diff options
Diffstat (limited to 'arch/um')
123 files changed, 1971 insertions, 1730 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index 684e1f8b275..563301fe5df 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -7,7 +7,6 @@ config UML bool default y -# XXX: does UM have a mmu/swap? config MMU bool default y @@ -27,10 +26,6 @@ config UID16 bool default y -config RWSEM_GENERIC_SPINLOCK - bool - default y - config GENERIC_CALIBRATE_DELAY bool default y @@ -63,6 +58,30 @@ config STATIC_LINK chroot, and you disable CONFIG_MODE_TT, you probably want to say Y here. +config HOST_2G_2G + bool "2G/2G host address space split" + default n + depends on MODE_TT + help + This is needed when the host on which you run has a 2G/2G memory + split, instead of the customary 3G/1G. + + Note that to enable such a host + configuration, which makes sense only in some cases, you need special + host patches. + + So, if you do not know what to do here, say 'N'. + +config KERNEL_HALF_GIGS + int "Kernel address space size (in .5G units)" + default "1" + depends on MODE_TT + help + This determines the amount of address space that UML will allocate for + its own, measured in half Gigabyte units. The default is 1. + Change this only if you need to boot UML with an unusually large amount + of physical memory. + config MODE_SKAS bool "Separate Kernel Address Space support" default y @@ -180,23 +199,11 @@ config MAGIC_SYSRQ The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y unless you really know what this hack does. -config HOST_2G_2G - bool "2G/2G host address space split" - default n - help - This is needed when the host on which you run has a 2G/2G memory - split, instead of the customary 3G/1G. - - Note that to enable such a host - configuration, which makes sense only in some cases, you need special - host patches. - - So, if you do not know what to do here, say 'N'. - config SMP bool "Symmetric multi-processing support (EXPERIMENTAL)" default n - depends on (MODE_TT && EXPERIMENTAL && !SMP_BROKEN) || (BROKEN && SMP_BROKEN) + #SMP_BROKEN is for x86_64. + depends on MODE_TT && EXPERIMENTAL && (!SMP_BROKEN || (BROKEN && SMP_BROKEN)) help This option enables UML SMP support. It is NOT related to having a real SMP box. Not directly, at least. @@ -239,15 +246,6 @@ config NEST_LEVEL set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS. Only change this if you are running nested UMLs. -config KERNEL_HALF_GIGS - int "Kernel address space size (in .5G units)" - default "1" - help - This determines the amount of address space that UML will allocate for - its own, measured in half Gigabyte units. The default is 1. - Change this only if you need to boot UML with an unusually large amount - of physical memory. - config HIGHMEM bool "Highmem support" depends on !64BIT diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386 index 5d92cacd56c..c71b39a677a 100644 --- a/arch/um/Kconfig.i386 +++ b/arch/um/Kconfig.i386 @@ -1,3 +1,9 @@ +menu "Host processor type and features" + +source "arch/i386/Kconfig.cpu" + +endmenu + config UML_X86 bool default y @@ -42,7 +48,3 @@ config ARCH_HAS_SC_SIGNALS config ARCH_REUSE_HOST_VSYSCALL_AREA bool default y - -config X86_CMPXCHG - bool - default y diff --git a/arch/um/Kconfig.x86_64 b/arch/um/Kconfig.x86_64 index bd35e59419c..aae19bc4b06 100644 --- a/arch/um/Kconfig.x86_64 +++ b/arch/um/Kconfig.x86_64 @@ -6,6 +6,11 @@ config 64BIT bool default y +#XXX: this is so in the underlying arch, but it's wrong!!! +config RWSEM_GENERIC_SPINLOCK + bool + default y + config SEMAPHORE_SLEEPERS bool default y diff --git a/arch/um/Makefile b/arch/um/Makefile index 5b5af95721a..1b12feeba36 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -17,7 +17,7 @@ core-y += $(ARCH_DIR)/kernel/ \ # Have to precede the include because the included Makefiles reference them. SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \ - module.h vm-flags.h elf.h + module.h vm-flags.h elf.h ldt.h SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header)) # XXX: The "os" symlink is only used by arch/um/include/os.h, which includes @@ -28,8 +28,6 @@ SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header)) ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \ $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h -GEN_HEADERS += $(ARCH_DIR)/include/task.h $(ARCH_DIR)/include/kern_constants.h - um-modes-$(CONFIG_MODE_TT) += tt um-modes-$(CONFIG_MODE_SKAS) += skas @@ -45,9 +43,7 @@ endif ARCH_INCLUDE := -I$(ARCH_DIR)/include ifneq ($(KBUILD_SRC),) -ARCH_INCLUDE += -I$(ARCH_DIR)/include2 ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include -MRPROPER_DIRS += $(ARCH_DIR)/include2 endif SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH) @@ -64,7 +60,7 @@ AFLAGS += $(ARCH_INCLUDE) USER_CFLAGS := $(patsubst -I%,,$(CFLAGS)) USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ - $(MODE_INCLUDE) + $(MODE_INCLUDE) -D_FILE_OFFSET_BITS=64 # -Derrno=kernel_errno - This turns all kernel references to errno into # kernel_errno to separate them from the libc errno. This allows -fno-common @@ -87,10 +83,6 @@ CONFIG_KERNEL_HALF_GIGS ?= 0 SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000) -ifeq ($(CONFIG_MODE_SKAS), y) -$(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h -endif - .PHONY: linux all: linux @@ -111,7 +103,8 @@ else $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch) endif -archprepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS) +archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h +prepare: $(ARCH_DIR)/include/kern_constants.h LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib @@ -146,22 +139,20 @@ endef #When cleaning we don't include .config, so we don't include #TT or skas makefiles and don't clean skas_ptregs.h. CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \ - $(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h \ - $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/Kconfig.arch + $(ARCH_DIR)/include/user_constants.h \ + $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \ $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os archclean: - $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util - $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/os-$(OS)/util @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ -o -name '*.gcov' \) -type f -print | xargs rm -f $(SYMLINK_HEADERS): @echo ' SYMLINK $@' ifneq ($(KBUILD_SRC),) - ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ + $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ else $(Q)cd $(TOPDIR)/$(dir $@) ; \ ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) @@ -180,9 +171,7 @@ $(ARCH_DIR)/include/sysdep: @echo ' SYMLINK $@' ifneq ($(KBUILD_SRC),) $(Q)mkdir -p $(ARCH_DIR)/include - $(Q)mkdir -p $(ARCH_DIR)/include2 - $(Q)ln -fsn sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep - $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include2/sysdep + $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep else $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep endif @@ -202,8 +191,6 @@ endef define filechk_gen-asm-offsets (set -e; \ - echo "#ifndef __ASM_OFFSETS_H__"; \ - echo "#define __ASM_OFFSETS_H__"; \ echo "/*"; \ echo " * DO NOT MODIFY."; \ echo " *"; \ @@ -212,8 +199,7 @@ define filechk_gen-asm-offsets echo " */"; \ echo ""; \ sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ - echo ""; \ - echo "#endif" ) + echo ""; ) endef $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h @@ -222,50 +208,18 @@ $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h $(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c $(CC) $(USER_CFLAGS) -S -o $@ $< -$(ARCH_DIR)/user-offsets.h: $(ARCH_DIR)/user-offsets.s +$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s $(call filechk,gen-asm-offsets) -CLEAN_FILES += $(ARCH_DIR)/user-offsets.s $(ARCH_DIR)/user-offsets.h +CLEAN_FILES += $(ARCH_DIR)/user-offsets.s $(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \ - $(ARCH_SYMLINKS) \ - $(SYS_DIR)/sc.h \ - include/asm include/linux/version.h \ - include/config/MARKER \ - $(ARCH_DIR)/include/user_constants.h + archprepare $(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $< -$(ARCH_DIR)/kernel-offsets.h: $(ARCH_DIR)/kernel-offsets.s +$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/kernel-offsets.s $(call filechk,gen-asm-offsets) -CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s $(ARCH_DIR)/kernel-offsets.h - -$(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task - $(call filechk,gen_header) - -$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/os-$(OS)/util/mk_user_constants - $(call filechk,gen_header) - -$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/util/mk_constants - $(call filechk,gen_header) - -$(ARCH_DIR)/include/skas_ptregs.h: $(ARCH_DIR)/kernel/skas/util/mk_ptregs - $(call filechk,gen_header) - -$(ARCH_DIR)/os-$(OS)/util/mk_user_constants: $(ARCH_DIR)/os-$(OS)/util FORCE ; - -$(ARCH_DIR)/util/mk_task $(ARCH_DIR)/util/mk_constants: $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/util \ - FORCE ; - -$(ARCH_DIR)/kernel/skas/util/mk_ptregs: $(ARCH_DIR)/kernel/skas/util FORCE ; - -$(ARCH_DIR)/util: scripts_basic $(SYS_DIR)/sc.h $(ARCH_DIR)/kernel-offsets.h FORCE - $(Q)$(MAKE) $(build)=$@ - -$(ARCH_DIR)/kernel/skas/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE - $(Q)$(MAKE) $(build)=$@ - -$(ARCH_DIR)/os-$(OS)/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE - $(Q)$(MAKE) $(build)=$@ +CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s export SUBARCH USER_CFLAGS OS diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386 index 1ab431a53ac..7a0e04e34bf 100644 --- a/arch/um/Makefile-i386 +++ b/arch/um/Makefile-i386 @@ -17,8 +17,6 @@ ifeq ("$(origin SUBARCH)", "command line") ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)") CFLAGS += $(call cc-option,-m32) USER_CFLAGS += $(call cc-option,-m32) -HOSTCFLAGS += $(call cc-option,-m32) -HOSTLDFLAGS += $(call cc-option,-m32) AFLAGS += $(call cc-option,-m32) LINK-y += $(call cc-option,-m32) UML_OBJCOPYFLAGS += -F $(ELF_FORMAT) @@ -29,28 +27,11 @@ endif CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH) -ifneq ($(CONFIG_GPROF),y) -ARCH_CFLAGS += -DUM_FASTCALL -endif - -SYS_UTIL_DIR := $(ARCH_DIR)/sys-i386/util -SYS_HEADERS := $(SYS_DIR)/sc.h $(SYS_DIR)/thread.h - -prepare: $(SYS_HEADERS) - -$(SYS_DIR)/sc.h: $(SYS_UTIL_DIR)/mk_sc - $(call filechk,gen_header) - -$(SYS_DIR)/thread.h: $(SYS_UTIL_DIR)/mk_thread - $(call filechk,gen_header) - -$(SYS_UTIL_DIR)/mk_sc: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE - $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR) $@ - -$(SYS_UTIL_DIR)/mk_thread: scripts_basic $(ARCH_DIR)/kernel-offsets.h FORCE - $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR) $@ +# First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y. +include $(srctree)/arch/i386/Makefile.cpu -$(SYS_UTIL_DIR): scripts_basic include/asm FORCE - $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR) +# prevent gcc from keeping the stack 16 byte aligned. Taken from i386. +cflags-y += $(call cc-option,-mpreferred-stack-boundary=2) -CLEAN_FILES += $(SYS_HEADERS) +CFLAGS += $(cflags-y) +USER_CFLAGS += $(cflags-y) diff --git a/arch/um/Makefile-skas b/arch/um/Makefile-skas index fd18ec57227..ac35de5316a 100644 --- a/arch/um/Makefile-skas +++ b/arch/um/Makefile-skas @@ -10,5 +10,3 @@ CFLAGS-$(CONFIG_GCOV) += $(GCOV_OPT) CFLAGS-$(CONFIG_GPROF) += $(GPROF_OPT) LINK-$(CONFIG_GCOV) += $(GCOV_OPT) LINK-$(CONFIG_GPROF) += $(GPROF_OPT) - -GEN_HEADERS += $(ARCH_DIR)/include/skas_ptregs.h diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64 index 436abbba409..4f118d5cc2e 100644 --- a/arch/um/Makefile-x86_64 +++ b/arch/um/Makefile-x86_64 @@ -12,24 +12,3 @@ CHECKFLAGS += -m64 ELF_ARCH := i386:x86-64 ELF_FORMAT := elf64-x86-64 - -SYS_UTIL_DIR := $(ARCH_DIR)/sys-x86_64/util -SYS_DIR := $(ARCH_DIR)/include/sysdep-x86_64 - -SYS_HEADERS = $(SYS_DIR)/sc.h $(SYS_DIR)/thread.h - -prepare: $(SYS_HEADERS) - -$(SYS_DIR)/sc.h: $(SYS_UTIL_DIR)/mk_sc - $(call filechk,gen_header) - -$(SYS_DIR)/thread.h: $(SYS_UTIL_DIR)/mk_thread - $(call filechk,gen_header) - -$(SYS_UTIL_DIR)/mk_sc: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE - $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR) $@ - -$(SYS_UTIL_DIR)/mk_thread: scripts_basic $(GEN_HEADERS) $(ARCH_DIR)/kernel-offsets.h FORCE - $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR) $@ - -CLEAN_FILES += $(SYS_HEADERS) diff --git a/arch/um/drivers/Makefile b/arch/um/drivers/Makefile index 783e18cae09..de17d4c6e02 100644 --- a/arch/um/drivers/Makefile +++ b/arch/um/drivers/Makefile @@ -13,7 +13,7 @@ mcast-objs := mcast_kern.o mcast_user.o net-objs := net_kern.o net_user.o mconsole-objs := mconsole_kern.o mconsole_user.o hostaudio-objs := hostaudio_kern.o -ubd-objs := ubd_kern.o +ubd-objs := ubd_kern.o ubd_user.o port-objs := port_kern.o port_user.o harddog-objs := harddog_kern.o harddog_user.o diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c index 14a12d6b3df..5b58fad4529 100644 --- a/arch/um/drivers/chan_kern.c +++ b/arch/um/drivers/chan_kern.c @@ -19,18 +19,44 @@ #include "line.h" #include "os.h" -#ifdef CONFIG_NOCONFIG_CHAN +/* XXX: could well be moved to somewhere else, if needed. */ +static int my_printf(const char * fmt, ...) + __attribute__ ((format (printf, 1, 2))); + +static int my_printf(const char * fmt, ...) +{ + /* Yes, can be called on atomic context.*/ + char *buf = kmalloc(4096, GFP_ATOMIC); + va_list args; + int r; + + if (!buf) { + /* We print directly fmt. + * Yes, yes, yes, feel free to complain. */ + r = strlen(fmt); + } else { + va_start(args, fmt); + r = vsprintf(buf, fmt, args); + va_end(args); + fmt = buf; + } -/* The printk's here are wrong because we are complaining that there is no - * output device, but printk is printing to that output device. The user will - * never see the error. printf would be better, except it can't run on a - * kernel stack because it will overflow it. - * Use printk for now since that will avoid crashing. - */ + if (r) + r = os_write_file(1, fmt, r); + return r; + +} + +#ifdef CONFIG_NOCONFIG_CHAN +/* Despite its name, there's no added trailing newline. */ +static int my_puts(const char * buf) +{ + return os_write_file(1, buf, strlen(buf)); +} static void *not_configged_init(char *str, int device, struct chan_opts *opts) { - printk(KERN_ERR "Using a channel type which is configured out of " + my_puts("Using a channel type which is configured out of " "UML\n"); return(NULL); } @@ -38,35 +64,34 @@ static void *not_configged_init(char *str, int device, struct chan_opts *opts) static int not_configged_open(int input, int output, int primary, void *data, char **dev_out) { - printk(KERN_ERR "Using a channel type which is configured out of " + my_puts("Using a channel type which is configured out of " "UML\n"); return(-ENODEV); } static void not_configged_close(int fd, void *data) { - printk(KERN_ERR "Using a channel type which is configured out of " + my_puts("Using a channel type which is configured out of " "UML\n"); } static int not_configged_read(int fd, char *c_out, void *data) { - printk(KERN_ERR "Using a channel type which is configured out of " + my_puts("Using a channel type which is configured out of " "UML\n"); return(-EIO); } static int not_configged_write(int fd, const char *buf, int len, void *data) { - printk(KERN_ERR "Using a channel type which is configured out of " + my_puts("Using a channel type which is configured out of " "UML\n"); return(-EIO); } -static int not_configged_console_write(int fd, const char *buf, int len, - void *data) +static int not_configged_console_write(int fd, const char *buf, int len) { - printk(KERN_ERR "Using a channel type which is configured out of " + my_puts("Using a channel type which is configured out of " "UML\n"); return(-EIO); } @@ -74,14 +99,14 @@ static int not_configged_console_write(int fd, const char *buf, int len, static int not_configged_window_size(int fd, void *data, unsigned short *rows, unsigned short *cols) { - printk(KERN_ERR "Using a channel type which is configured out of " + my_puts("Using a channel type which is configured out of " "UML\n"); return(-ENODEV); } static void not_configged_free(void *data) { - printf(KERN_ERR "Using a channel type which is configured out of " + my_puts("Using a channel type which is configured out of " "UML\n"); } @@ -273,7 +298,7 @@ int console_write_chan(struct list_head *chans, const char *buf, int len) chan = list_entry(ele, struct chan, list); if(!chan->output || (chan->ops->console_write == NULL)) continue; - n = chan->ops->console_write(chan->fd, buf, len, chan->data); + n = chan->ops->console_write(chan->fd, buf, len); if(chan->primary) ret = n; } return(ret); @@ -457,7 +482,7 @@ static struct chan *parse_chan(char *str, int pri, int device, } } if(ops == NULL){ - printk(KERN_ERR "parse_chan couldn't parse \"%s\"\n", + my_printf("parse_chan couldn't parse \"%s\"\n", str); return(NULL); } @@ -465,7 +490,7 @@ static struct chan *parse_chan(char *str, int pri, int device, data = (*ops->init)(str, device, opts); if(data == NULL) return(NULL); - chan = kmalloc(sizeof(*chan), GFP_KERNEL); + chan = kmalloc(sizeof(*chan), GFP_ATOMIC); if(chan == NULL) return(NULL); *chan = ((struct chan) { .list = LIST_HEAD_INIT(chan->list), .primary = 1, diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c index de3bce71aeb..5d50d4a44ab 100644 --- a/arch/um/drivers/chan_user.c +++ b/arch/um/drivers/chan_user.c @@ -16,12 +16,11 @@ #include "user_util.h" #include "chan_user.h" #include "user.h" -#include "helper.h" #include "os.h" #include "choose-mode.h" #include "mode.h" -int generic_console_write(int fd, const char *buf, int n, void *unused) +int generic_console_write(int fd, const char *buf, int n) { struct termios save, new; int err; diff --git a/arch/um/drivers/cow.h b/arch/um/drivers/cow.h index 4fcf3a8d13f..dc36b222100 100644 --- a/arch/um/drivers/cow.h +++ b/arch/um/drivers/cow.h @@ -3,15 +3,40 @@ #include <asm/types.h> -#if defined(__BIG_ENDIAN) -# define ntohll(x) (x) -# define htonll(x) (x) -#elif defined(__LITTLE_ENDIAN) -# define ntohll(x) bswap_64(x) -# define htonll(x) bswap_64(x) +#if defined(__KERNEL__) + +# include <asm/byteorder.h> + +# if defined(__BIG_ENDIAN) +# define ntohll(x) (x) +# define htonll(x) (x) +# elif defined(__LITTLE_ENDIAN) +# define ntohll(x) be64_to_cpu(x) +# define htonll(x) cpu_to_be64(x) +# else +# error "Could not determine byte order" +# endif + #else -#error "__BYTE_ORDER not defined" +/* For the definition of ntohl, htonl and __BYTE_ORDER */ +#include <endian.h> +#include <netinet/in.h> +#if defined(__BYTE_ORDER) + +# if __BYTE_ORDER == __BIG_ENDIAN +# define ntohll(x) (x) +# define htonll(x) (x) +# elif __BYTE_ORDER == __LITTLE_ENDIAN +# define ntohll(x) bswap_64(x) +# define htonll(x) bswap_64(x) +# else +# error "Could not determine byte order: __BYTE_ORDER uncorrectly defined" +# endif + +#else /* ! defined(__BYTE_ORDER) */ +# error "Could not determine byte order: __BYTE_ORDER not defined" #endif +#endif /* ! defined(__KERNEL__) */ extern int init_cow_file(int fd, char *cow_file, char *backing_file, int sectorsize, int alignment, int *bitmap_offset_out, diff --git a/arch/um/drivers/cow_user.c b/arch/um/drivers/cow_user.c index a8ce6fc3ef2..fbe2217db5d 100644 --- a/arch/um/drivers/cow_user.c +++ b/arch/um/drivers/cow_user.c @@ -9,7 +9,6 @@ #include <sys/time.h> #include <sys/param.h> #include <sys/user.h> -#include <netinet/in.h> #include "os.h" diff --git a/arch/um/drivers/daemon_user.c b/arch/um/drivers/daemon_user.c index c1b03f7c1da..1bb085b2824 100644 --- a/arch/um/drivers/daemon_user.c +++ b/arch/um/drivers/daemon_user.c @@ -98,7 +98,7 @@ static int connect_to_switch(struct daemon_data *pri) printk("daemon_open : control setup request failed, err = %d\n", -n); err = -ENOTCONN; - goto out; + goto out_free; } n = os_read_file(pri->control, sun, sizeof(*sun)); @@ -106,12 +106,14 @@ static int connect_to_switch(struct daemon_data *pri) printk("daemon_open : read of data socket failed, err = %d\n", -n); err = -ENOTCONN; - goto out_close; + goto out_free; } pri->data_addr = sun; return(fd); + out_free: + kfree(sun); out_close: os_close_file(fd); out: diff --git a/arch/um/drivers/fd.c b/arch/um/drivers/fd.c index f0b888f66e0..3296e86a03a 100644 --- a/arch/um/drivers/fd.c +++ b/arch/um/drivers/fd.c @@ -76,13 +76,6 @@ static void fd_close(int fd, void *d) } } -static int fd_console_write(int fd, const char *buf, int n, void *d) -{ - struct fd_chan *data = d; - - return(generic_console_write(fd, buf, n, &data->tt)); -} - struct chan_ops fd_ops = { .type = "fd", .init = fd_init, @@ -90,7 +83,7 @@ struct chan_ops fd_ops = { .close = fd_close, .read = generic_read, .write = generic_write, - .console_write = fd_console_write, + .console_write = generic_console_write, .window_size = generic_window_size, .free = generic_free, .winch = 1, diff --git a/arch/um/drivers/harddog_kern.c b/arch/um/drivers/harddog_kern.c index 147ec19f6bb..49acb2badf3 100644 --- a/arch/um/drivers/harddog_kern.c +++ b/arch/um/drivers/harddog_kern.c @@ -46,7 +46,6 @@ #include <linux/smp_lock.h> #include <linux/init.h> #include <asm/uaccess.h> -#include "helper.h" #include "mconsole.h" MODULE_LICENSE("GPL"); diff --git a/arch/um/drivers/harddog_user.c b/arch/um/drivers/harddog_user.c index d934181b8d4..def013b5a3c 100644 --- a/arch/um/drivers/harddog_user.c +++ b/arch/um/drivers/harddog_user.c @@ -8,7 +8,6 @@ #include <errno.h> #include "user_util.h" #include "user.h" -#include "helper.h" #include "mconsole.h" #include "os.h" #include "choose-mode.h" diff --git a/arch/um/drivers/mcast_user.c b/arch/um/drivers/mcast_user.c index 5db136e2651..afe85bfa66e 100644 --- a/arch/um/drivers/mcast_user.c +++ b/arch/um/drivers/mcast_user.c @@ -54,7 +54,7 @@ static int mcast_open(void *data) struct mcast_data *pri = data; struct sockaddr_in *sin = pri->mcast_addr; struct ip_mreq mreq; - int fd, yes = 1, err = 0; + int fd, yes = 1, err = -EINVAL; if ((sin->sin_addr.s_addr == 0) || (sin->sin_port == 0)) @@ -63,40 +63,40 @@ static int mcast_open(void *data) fd = socket(AF_INET, SOCK_DGRAM, 0); if (fd < 0){ + err = -errno; printk("mcast_open : data socket failed, errno = %d\n", errno); - err = -errno; goto out; } if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) { + err = -errno; printk("mcast_open: SO_REUSEADDR failed, errno = %d\n", errno); - err = -errno; goto out_close; } /* set ttl according to config */ if (setsockopt(fd, SOL_IP, IP_MULTICAST_TTL, &pri->ttl, sizeof(pri->ttl)) < 0) { + err = -errno; printk("mcast_open: IP_MULTICAST_TTL failed, error = %d\n", errno); - err = -errno; goto out_close; } /* set LOOP, so data does get fed back to local sockets */ if (setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP, &yes, sizeof(yes)) < 0) { + err = -errno; printk("mcast_open: IP_MULTICAST_LOOP failed, error = %d\n", errno); - err = -errno; goto out_close; } /* bind socket to mcast address */ if (bind(fd, (struct sockaddr *) sin, sizeof(*sin)) < 0) { - printk("mcast_open : data bind failed, errno = %d\n", errno); err = -errno; + printk("mcast_open : data bind failed, errno = %d\n", errno); goto out_close; } @@ -105,22 +105,22 @@ static int mcast_open(void *data) mreq.imr_interface.s_addr = 0; if (setsockopt(fd, SOL_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) { + err = -errno; printk("mcast_open: IP_ADD_MEMBERSHIP failed, error = %d\n", errno); printk("There appears not to be a multicast-capable network " "interface on the host.\n"); printk("eth0 should be configured in order to use the " "multicast transport.\n"); - err = -errno; - goto out_close; + goto out_close; } return fd; out_close: - os_close_file(fd); + os_close_file(fd); out: - return err; + return err; } static void mcast_close(int fd, void *data) diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c index 1495007bf6c..84c73a300ac 100644 --- a/arch/um/drivers/net_kern.c +++ b/arch/um/drivers/net_kern.c @@ -20,6 +20,7 @@ #include "linux/ctype.h" #include "linux/bootmem.h" #include "linux/ethtool.h" +#include "linux/platform_device.h" #include "asm/uaccess.h" #include "user_util.h" #include "kern_util.h" @@ -95,7 +96,6 @@ irqreturn_t uml_net_interrupt(int irq, void *dev_id, struct pt_regs *regs) static int uml_net_open(struct net_device *dev) { struct uml_net_private *lp = dev->priv; - char addr[sizeof("255.255.255.255\0")]; int err; spin_lock(&lp->lock); @@ -106,7 +106,7 @@ static int uml_net_open(struct net_device *dev) } if(!lp->have_mac){ - dev_ip_addr(dev, addr, &lp->mac[2]); + dev_ip_addr(dev, &lp->mac[2]); set_ether_mac(dev, lp->mac); } @@ -243,34 +243,18 @@ static int uml_net_change_mtu(struct net_device *dev, int new_mtu) return err; } -static int uml_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) -{ - static const struct ethtool_drvinfo info = { - .cmd = ETHTOOL_GDRVINFO, - .driver = DRIVER_NAME, - .version = "42", - }; - void *useraddr; - u32 ethcmd; - - switch (cmd) { - case SIOCETHTOOL: - useraddr = ifr->ifr_data; - if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) - return -EFAULT; - switch (ethcmd) { - case ETHTOOL_GDRVINFO: - if (copy_to_user(useraddr, &info, sizeof(info))) - return -EFAULT; - return 0; - default: - return -EOPNOTSUPP; - } - default: - return -EINVAL; - } +static void uml_net_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + strcpy(info->driver, DRIVER_NAME); + strcpy(info->version, "42"); } +static struct ethtool_ops uml_net_ethtool_ops = { + .get_drvinfo = uml_net_get_drvinfo, + .get_link = ethtool_op_get_link, +}; + void uml_net_user_timer_expire(unsigned long _conn) { #ifdef undef @@ -284,9 +268,10 @@ void uml_net_user_timer_expire(unsigned long _conn) static DEFINE_SPINLOCK(devices_lock); static struct list_head devices = LIST_HEAD_INIT(devices); -static struct device_driver uml_net_driver = { - .name = DRIVER_NAME, - .bus = &platform_bus_type, +static struct platform_driver uml_net_driver = { + .driver = { + .name = DRIVER_NAME, + }, }; static int driver_registered; @@ -333,7 +318,7 @@ static int eth_configure(int n, void *init, char *mac, /* sysfs register */ if (!driver_registered) { - driver_register(¨_net_driver); + platform_driver_register(¨_net_driver); driver_registered = 1; } device->pdev.id = n; @@ -359,7 +344,7 @@ static int eth_configure(int n, void *init, char *mac, dev->tx_timeout = uml_net_tx_timeout; dev->set_mac_address = uml_net_set_mac; dev->change_mtu = uml_net_change_mtu; - dev->do_ioctl = uml_net_ioctl; + dev->ethtool_ops = ¨_net_ethtool_ops; dev->watchdog_timeo = (HZ >> 1); dev->irq = UM_ETH_IRQ; @@ -663,8 +648,6 @@ static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) { struct in_ifaddr *ifa = ptr; - u32 addr = ifa->ifa_address; - u32 netmask = ifa->ifa_mask; struct net_device *dev = ifa->ifa_dev->dev; struct uml_net_private *lp; void (*proc)(unsigned char *, unsigned char *, void *); @@ -684,14 +667,8 @@ static int uml_inetaddr_event(struct notifier_block *this, unsigned long event, break; } if(proc != NULL){ - addr_buf[0] = addr & 0xff; - addr_buf[1] = (addr >> 8) & 0xff; - addr_buf[2] = (addr >> 16) & 0xff; - addr_buf[3] = addr >> 24; - netmask_buf[0] = netmask & 0xff; - netmask_buf[1] = (netmask >> 8) & 0xff; - netmask_buf[2] = (netmask >> 16) & 0xff; - netmask_buf[3] = netmask >> 24; + memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf)); + memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf)); (*proc)(addr_buf, netmask_buf, &lp->user); } return(NOTIFY_DONE); @@ -773,27 +750,18 @@ int setup_etheraddr(char *str, unsigned char *addr) return(1); } -void dev_ip_addr(void *d, char *buf, char *bin_buf) +void dev_ip_addr(void *d, unsigned char *bin_buf) { struct net_device *dev = d; struct in_device *ip = dev->ip_ptr; struct in_ifaddr *in; - u32 addr; if((ip == NULL) || ((in = ip->ifa_list) == NULL)){ printk(KERN_WARNING "dev_ip_addr - device not assigned an " "IP address\n"); return; } - addr = in->ifa_address; - sprintf(buf, "%d.%d.%d.%d", addr & 0xff, (addr >> 8) & 0xff, - (addr >> 16) & 0xff, addr >> 24); - if(bin_buf){ - bin_buf[0] = addr & 0xff; - bin_buf[1] = (addr >> 8) & 0xff; - bin_buf[2] = (addr >> 16) & 0xff; - bin_buf[3] = addr >> 24; - } + memcpy(bin_buf, &in->ifa_address, sizeof(in->ifa_address)); } void set_ether_mac(void *d, unsigned char *addr) @@ -828,14 +796,8 @@ void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, if(ip == NULL) return; in = ip->ifa_list; while(in != NULL){ - address[0] = in->ifa_address & 0xff; - address[1] = (in->ifa_address >> 8) & 0xff; - address[2] = (in->ifa_address >> 16) & 0xff; - address[3] = in->ifa_address >> 24; - netmask[0] = in->ifa_mask & 0xff; - netmask[1] = (in->ifa_mask >> 8) & 0xff; - netmask[2] = (in->ifa_mask >> 16) & 0xff; - netmask[3] = in->ifa_mask >> 24; + memcpy(address, &in->ifa_address, sizeof(address)); + memcpy(netmask, &in->ifa_mask, sizeof(netmask)); (*cb)(address, netmask, arg); in = in->ifa_next; } diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c index 3730d4f1271..098fa65981a 100644 --- a/arch/um/drivers/net_user.c +++ b/arch/um/drivers/net_user.c @@ -16,7 +16,6 @@ #include "user_util.h" #include "kern_util.h" #include "net_user.h" -#include "helper.h" #include "os.h" int tap_open_common(void *dev, char *gate_addr) diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c index c41efd207fc..189839e4f1d 100644 --- a/arch/um/drivers/port_kern.c +++ b/arch/um/drivers/port_kern.c @@ -7,7 +7,6 @@ #include "linux/sched.h" #include "linux/slab.h" #include "linux/interrupt.h" -#include "linux/irq.h" #include "linux/spinlock.h" #include "linux/errno.h" #include "asm/atomic.h" diff --git a/arch/um/drivers/port_user.c b/arch/um/drivers/port_user.c index 14dd2002d2d..c43e8bb3250 100644 --- a/arch/um/drivers/port_user.c +++ b/arch/um/drivers/port_user.c @@ -18,7 +18,6 @@ #include "user.h" #include "chan_user.h" #include "port.h" -#include "helper.h" #include "os.h" struct port_chan { @@ -101,13 +100,6 @@ static void port_close(int fd, void *d) os_close_file(fd); } -static int port_console_write(int fd, const char *buf, int n, void *d) -{ - struct port_chan *data = d; - - return(generic_console_write(fd, buf, n, &data->tt)); -} - struct chan_ops port_ops = { .type = "port", .init = port_init, @@ -115,7 +107,7 @@ struct chan_ops port_ops = { .close = port_close, .read = generic_read, .write = generic_write, - .console_write = port_console_write, + .console_write = generic_console_write, .window_size = generic_window_size, .free = port_free, .winch = 1, diff --git a/arch/um/drivers/pty.c b/arch/um/drivers/pty.c index 0306a1b215b..1c555c38de4 100644 --- a/arch/um/drivers/pty.c +++ b/arch/um/drivers/pty.c @@ -118,13 +118,6 @@ static int pty_open(int input, int output, int primary, void *d, return(fd); } -static int pty_console_write(int fd, const char *buf, int n, void *d) -{ - struct pty_chan *data = d; - - return(generic_console_write(fd, buf, n, &data->tt)); -} - struct chan_ops pty_ops = { .type = "pty", .init = pty_chan_init, @@ -132,7 +125,7 @@ struct chan_ops pty_ops = { .close = generic_close, .read = generic_read, .write = generic_write, - .console_write = pty_console_write, + .console_write = generic_console_write, .window_size = generic_window_size, .free = generic_free, .winch = 0, @@ -145,7 +138,7 @@ struct chan_ops pts_ops = { .close = generic_close, .read = generic_read, .write = generic_write, - .console_write = pty_console_write, + .console_write = generic_console_write, .window_size = generic_window_size, .free = generic_free, .winch = 0, diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c index f9e22198e01..ba471f5864a 100644 --- a/arch/um/drivers/random.c +++ b/arch/um/drivers/random.c @@ -58,10 +58,8 @@ static ssize_t rng_dev_read (struct file *filp, char __user *buf, size_t size, if (filp->f_flags & O_NONBLOCK) return ret ? : -EAGAIN; - if(need_resched()){ - current->state = TASK_INTERRUPTIBLE; - schedule_timeout(1); - } + if(need_resched()) + schedule_timeout_interruptible(1); } else return n; if (signal_pending (current)) diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c index 71af444e591..89fbec185cc 100644 --- a/arch/um/drivers/slip_user.c +++ b/arch/um/drivers/slip_user.c @@ -14,7 +14,6 @@ #include "net_user.h" #include "slip.h" #include "slip_common.h" -#include "helper.h" #include "os.h" void slip_user_init(void *data, void *dev) diff --git a/arch/um/drivers/slirp_user.c b/arch/um/drivers/slirp_user.c index 8d91f663d82..b94c66114bc 100644 --- a/arch/um/drivers/slirp_user.c +++ b/arch/um/drivers/slirp_user.c @@ -13,7 +13,6 @@ #include "net_user.h" #include "slirp.h" #include "slip_common.h" -#include "helper.h" #include "os.h" void slirp_user_init(void *data, void *dev) diff --git a/arch/um/drivers/tty.c b/arch/um/drivers/tty.c index 6fbb670ee27..94c9265a4f2 100644 --- a/arch/um/drivers/tty.c +++ b/arch/um/drivers/tty.c @@ -60,13 +60,6 @@ static int tty_open(int input, int output, int primary, void *d, return(fd); } -static int tty_console_write(int fd, const char *buf, int n, void *d) -{ - struct tty_chan *data = d; - - return(generic_console_write(fd, buf, n, &data->tt)); -} - struct chan_ops tty_ops = { .type = "tty", .init = tty_chan_init, @@ -74,7 +67,7 @@ struct chan_ops tty_ops = { .close = generic_close, .read = generic_read, .write = generic_write, - .console_write = tty_console_write, + .console_write = generic_console_write, .window_size = generic_window_size, .free = generic_free, .winch = 0, diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c index e77a38da435..93898917cbe 100644 --- a/arch/um/drivers/ubd_kern.c +++ b/arch/um/drivers/ubd_kern.c @@ -35,7 +35,7 @@ #include "linux/blkpg.h" #include "linux/genhd.h" #include "linux/spinlock.h" -#include "asm/atomic.h" +#include "linux/platform_device.h" #include "asm/segment.h" #include "asm/uaccess.h" #include "asm/irq.h" @@ -54,21 +54,20 @@ #include "mem.h" #include "mem_kern.h" #include "cow.h" -#include "aio.h" enum ubd_req { UBD_READ, UBD_WRITE }; struct io_thread_req { - enum aio_type op; + enum ubd_req op; int fds[2]; unsigned long offsets[2]; unsigned long long offset; unsigned long length; char *buffer; int sectorsize; - int bitmap_offset; - long bitmap_start; - long bitmap_end; + unsigned long sector_mask; + unsigned long long cow_offset; + unsigned long bitmap_words[2]; int error; }; @@ -82,31 +81,28 @@ extern int create_cow_file(char *cow_file, char *backing_file, unsigned long *bitmap_len_out, int *data_offset_out); extern int read_cow_bitmap(int fd, void *buf, int offset, int len); -extern void do_io(struct io_thread_req *req, struct request *r, - unsigned long *bitmap); +extern void do_io(struct io_thread_req *req); -static inline int ubd_test_bit(__u64 bit, void *data) +static inline int ubd_test_bit(__u64 bit, unsigned char *data) { - unsigned char *buffer = data; __u64 n; int bits, off; - bits = sizeof(buffer[0]) * 8; + bits = sizeof(data[0]) * 8; n = bit / bits; off = bit % bits; - return((buffer[n] & (1 << off)) != 0); + return((data[n] & (1 << off)) != 0); } -static inline void ubd_set_bit(__u64 bit, void *data) +static inline void ubd_set_bit(__u64 bit, unsigned char *data) { - unsigned char *buffer = data; __u64 n; int bits, off; - bits = sizeof(buffer[0]) * 8; + bits = sizeof(data[0]) * 8; n = bit / bits; off = bit % bits; - buffer[n] |= (1 << off); + data[n] |= (1 << off); } /*End stuff from ubd_user.h*/ @@ -115,6 +111,8 @@ static inline void ubd_set_bit(__u64 bit, void *data) static DEFINE_SPINLOCK(ubd_io_lock); static DEFINE_SPINLOCK(ubd_lock); +static void (*do_ubd)(void); + static int ubd_open(struct inode * inode, struct file * filp); static int ubd_release(struct inode * inode, struct file * file); static int ubd_ioctl(struct inode * inode, struct file * file, @@ -161,8 +159,6 @@ struct cow { int data_offset; }; -#define MAX_SG 64 - struct ubd { char *file; int count; @@ -173,7 +169,6 @@ struct ubd { int no_cow; struct cow cow; struct platform_device pdev; - struct scatterlist sg[MAX_SG]; }; #define DEFAULT_COW { \ @@ -466,114 +461,81 @@ __uml_help(fakehd, ); static void do_ubd_request(request_queue_t * q); -static int in_ubd; + +/* Only changed by ubd_init, which is an initcall. */ +int thread_fd = -1; /* Changed by ubd_handler, which is serialized because interrupts only * happen on CPU 0. */ int intr_count = 0; -static void ubd_end_request(struct request *req, int bytes, int uptodate) +/* call ubd_finish if you need to serialize */ +static void __ubd_finish(struct request *req, int error) { - if (!end_that_request_first(req, uptodate, bytes >> 9)) { - add_disk_randomness(req->rq_disk); - end_that_request_last(req); + int nsect; + + if(error){ + end_request(req, 0); + return; } + nsect = req->current_nr_sectors; + req->sector += nsect; + req->buffer += nsect << 9; + req->errors = 0; + req->nr_sectors -= nsect; + req->current_nr_sectors = 0; + end_request(req, 1); } -/* call ubd_finish if you need to serialize */ -static void __ubd_finish(struct request *req, int bytes) +static inline void ubd_finish(struct request *req, int error) { - if(bytes < 0){ - ubd_end_request(req, 0, 0); - return; - } - - ubd_end_request(req, bytes, 1); + spin_lock(&ubd_io_lock); + __ubd_finish(req, error); + spin_unlock(&ubd_io_lock); } -static inline void ubd_finish(struct request *req, int bytes) +/* Called without ubd_io_lock held */ +static void ubd_handler(void) { - spin_lock(&ubd_io_lock); - __ubd_finish(req, bytes); - spin_unlock(&ubd_io_lock); + struct io_thread_req req; + struct request *rq = elv_next_request(ubd_queue); + int n; + + do_ubd = NULL; + intr_count++; + n = os_read_file(thread_fd, &req, sizeof(req)); + if(n != sizeof(req)){ + printk(KERN_ERR "Pid %d - spurious interrupt in ubd_handler, " + "err = %d\n", os_getpid(), -n); + spin_lock(&ubd_io_lock); + end_request(rq, 0); + spin_unlock(&ubd_io_lock); + return; + } + + ubd_finish(rq, req.error); + reactivate_fd(thread_fd, UBD_IRQ); + do_ubd_request(ubd_queue); } -struct bitmap_io { - atomic_t count; - struct aio_context aio; -}; - -struct ubd_aio { - struct aio_context aio; - struct request *req; - int len; - struct bitmap_io *bitmap; - void *bitmap_buf; -}; - -static int ubd_reply_fd = -1; - static irqreturn_t ubd_intr(int irq, void *dev, struct pt_regs *unused) { - struct aio_thread_reply reply; - struct ubd_aio *aio; - struct request *req; - int err, n, fd = (int) (long) dev; - - while(1){ - err = os_read_file(fd, &reply, sizeof(reply)); - if(err == -EAGAIN) - break; - if(err < 0){ - printk("ubd_aio_handler - read returned err %d\n", - -err); - break; - } - - aio = container_of(reply.data, struct ubd_aio, aio); - n = reply.err; - - if(n == 0){ - req = aio->req; - req->nr_sectors -= aio->len >> 9; - - if((aio->bitmap != NULL) && - (atomic_dec_and_test(&aio->bitmap->count))){ - aio->aio = aio->bitmap->aio; - aio->len = 0; - kfree(aio->bitmap); - aio->bitmap = NULL; - submit_aio(&aio->aio); - } - else { - if((req->nr_sectors == 0) && - (aio->bitmap == NULL)){ - int len = req->hard_nr_sectors << 9; - ubd_finish(req, len); - } - - if(aio->bitmap_buf != NULL) - kfree(aio->bitmap_buf); - kfree(aio); - } - } - else if(n < 0){ - ubd_finish(aio->req, n); - if(aio->bitmap != NULL) - kfree(aio->bitmap); - if(aio->bitmap_buf != NULL) - kfree(aio->bitmap_buf); - kfree(aio); - } - } - reactivate_fd(fd, UBD_IRQ); + ubd_handler(); + return(IRQ_HANDLED); +} - do_ubd_request(ubd_queue); +/* Only changed by ubd_init, which is an initcall. */ +static int io_pid = -1; - return(IRQ_HANDLED); +void kill_io_thread(void) +{ + if(io_pid != -1) + os_kill_process(io_pid, 1); } +__uml_exitcall(kill_io_thread); + static int ubd_file_size(struct ubd *dev, __u64 *size_out) { char *file; @@ -608,7 +570,7 @@ static int ubd_open_dev(struct ubd *dev) &dev->cow.data_offset, create_ptr); if((dev->fd == -ENOENT) && create_cow){ - dev->fd = create_cow_file(dev->file, dev->cow.file, + dev->fd = create_cow_file(dev->file, dev->cow.file, dev->openflags, 1 << 9, PAGE_SIZE, &dev->cow.bitmap_offset, &dev->cow.bitmap_len, @@ -861,19 +823,16 @@ static int ubd_mc_init(void) __initcall(ubd_mc_init); -static struct device_driver ubd_driver = { - .name = DRIVER_NAME, - .bus = &platform_bus_type, +static struct platform_driver ubd_driver = { + .driver = { + .name = DRIVER_NAME, + }, }; int ubd_init(void) { int i; - ubd_reply_fd = init_aio_irq(UBD_IRQ, "ubd", ubd_intr); - if(ubd_reply_fd < 0) - printk("Setting up ubd AIO failed, err = %d\n", ubd_reply_fd); - devfs_mk_dir("ubd"); if (register_blkdev(MAJOR_NR, "ubd")) return -1; @@ -884,7 +843,6 @@ int ubd_init(void) return -1; } - blk_queue_max_hw_segments(ubd_queue, MAX_SG); if (fake_major != MAJOR_NR) { char name[sizeof("ubd_nnn\0")]; @@ -893,15 +851,43 @@ int ubd_init(void) if (register_blkdev(fake_major, "ubd")) return -1; } - driver_register(&ubd_driver); + platform_driver_register(&ubd_driver); for (i = 0; i < MAX_DEV; i++) ubd_add(i); - return 0; } late_initcall(ubd_init); +int ubd_driver_init(void){ + unsigned long stack; + int err; + + /* Set by CONFIG_BLK_DEV_UBD_SYNC or ubd=sync.*/ + if(global_openflags.s){ + printk(KERN_INFO "ubd: Synchronous mode\n"); + /* Letting ubd=sync be like using ubd#s= instead of ubd#= is + * enough. So use anyway the io thread. */ + } + stack = alloc_stack(0, 0); + io_pid = start_io_thread(stack + PAGE_SIZE - sizeof(void *), + &thread_fd); + if(io_pid < 0){ + printk(KERN_ERR + "ubd : Failed to start I/O thread (errno = %d) - " + "falling back to synchronous I/O\n", -io_pid); + io_pid = -1; + return(0); + } + err = um_request_irq(UBD_IRQ, thread_fd, IRQ_READ, ubd_intr, + SA_INTERRUPT, "ubd", ubd_dev); + if(err != 0) + printk(KERN_ERR "um_request_irq failed - errno = %d\n", -err); + return(err); +} + +device_initcall(ubd_driver_init); + static int ubd_open(struct inode *inode, struct file *filp) { struct gendisk *disk = inode->i_bdev->bd_disk; @@ -939,55 +925,105 @@ static int ubd_release(struct inode * inode, struct file * file) return(0); } -static void cowify_bitmap(struct io_thread_req *req, unsigned long *bitmap) +static void cowify_bitmap(__u64 io_offset, int length, unsigned long *cow_mask, + __u64 *cow_offset, unsigned long *bitmap, + __u64 bitmap_offset, unsigned long *bitmap_words, + __u64 bitmap_len) { - __u64 sector = req->offset / req->sectorsize; - int i; + __u64 sector = io_offset >> 9; + int i, update_bitmap = 0; + + for(i = 0; i < length >> 9; i++){ + if(cow_mask != NULL) + ubd_set_bit(i, (unsigned char *) cow_mask); + if(ubd_test_bit(sector + i, (unsigned char *) bitmap)) + continue; - for(i = 0; i < req->length / req->sectorsize; i++){ - if(ubd_test_bit(sector + i, bitmap)) - continue; + update_bitmap = 1; + ubd_set_bit(sector + i, (unsigned char *) bitmap); + } + + if(!update_bitmap) + return; - if(req->bitmap_start == -1) - req->bitmap_start = sector + i; - req->bitmap_end = sector + i + 1; + *cow_offset = sector / (sizeof(unsigned long) * 8); - ubd_set_bit(sector + i, bitmap); - } + /* This takes care of the case where we're exactly at the end of the + * device, and *cow_offset + 1 is off the end. So, just back it up + * by one word. Thanks to Lynn Kerby for the fix and James McMechan + * for the original diagnosis. + */ + if(*cow_offset == ((bitmap_len + sizeof(unsigned long) - 1) / + sizeof(unsigned long) - 1)) + (*cow_offset)--; + + bitmap_words[0] = bitmap[*cow_offset]; + bitmap_words[1] = bitmap[*cow_offset + 1]; + + *cow_offset *= sizeof(unsigned long); + *cow_offset += bitmap_offset; +} + +static void cowify_req(struct io_thread_req *req, unsigned long *bitmap, + __u64 bitmap_offset, __u64 bitmap_len) +{ + __u64 sector = req->offset >> 9; + int i; + + if(req->length > (sizeof(req->sector_mask) * 8) << 9) + panic("Operation too long"); + + if(req->op == UBD_READ) { + for(i = 0; i < req->length >> 9; i++){ + if(ubd_test_bit(sector + i, (unsigned char *) bitmap)) + ubd_set_bit(i, (unsigned char *) + &req->sector_mask); + } + } + else cowify_bitmap(req->offset, req->length, &req->sector_mask, + &req->cow_offset, bitmap, bitmap_offset, + req->bitmap_words, bitmap_len); } /* Called with ubd_io_lock held */ -static int prepare_request(struct request *req, struct io_thread_req *io_req, - unsigned long long offset, int page_offset, - int len, struct page *page) +static int prepare_request(struct request *req, struct io_thread_req *io_req) { struct gendisk *disk = req->rq_disk; struct ubd *dev = disk->private_data; + __u64 offset; + int len; + + if(req->rq_status == RQ_INACTIVE) return(1); /* This should be impossible now */ if((rq_data_dir(req) == WRITE) && !dev->openflags.w){ printk("Write attempted on readonly ubd device %s\n", disk->disk_name); - ubd_end_request(req, 0, 0); + end_request(req, 0); return(1); } + offset = ((__u64) req->sector) << 9; + len = req->current_nr_sectors << 9; + io_req->fds[0] = (dev->cow.file != NULL) ? dev->cow.fd : dev->fd; io_req->fds[1] = dev->fd; + io_req->cow_offset = -1; io_req->offset = offset; io_req->length = len; io_req->error = 0; - io_req->op = (rq_data_dir(req) == READ) ? AIO_READ : AIO_WRITE; + io_req->sector_mask = 0; + + io_req->op = (rq_data_dir(req) == READ) ? UBD_READ : UBD_WRITE; io_req->offsets[0] = 0; io_req->offsets[1] = dev->cow.data_offset; - io_req->buffer = page_address(page) + page_offset; + io_req->buffer = req->buffer; io_req->sectorsize = 1 << 9; - io_req->bitmap_offset = dev->cow.bitmap_offset; - io_req->bitmap_start = -1; - io_req->bitmap_end = -1; - if((dev->cow.file != NULL) && (io_req->op == UBD_WRITE)) - cowify_bitmap(io_req, dev->cow.bitmap); + if(dev->cow.file != NULL) + cowify_req(io_req, dev->cow.bitmap, dev->cow.bitmap_offset, + dev->cow.bitmap_len); + return(0); } @@ -996,36 +1032,30 @@ static void do_ubd_request(request_queue_t *q) { struct io_thread_req io_req; struct request *req; - __u64 sector; - int err; - - if(in_ubd) - return; - in_ubd = 1; - while((req = elv_next_request(q)) != NULL){ - struct gendisk *disk = req->rq_disk; - struct ubd *dev = disk->private_data; - int n, i; - - blkdev_dequeue_request(req); - - sector = req->sector; - n = blk_rq_map_sg(q, req, dev->sg); - - for(i = 0; i < n; i++){ - struct scatterlist *sg = &dev->sg[i]; - - err = prepare_request(req, &io_req, sector << 9, - sg->offset, sg->length, - sg->page); - if(err) - continue; - - sector += sg->length >> 9; - do_io(&io_req, req, dev->cow.bitmap); + int err, n; + + if(thread_fd == -1){ + while((req = elv_next_request(q)) != NULL){ + err = prepare_request(req, &io_req); + if(!err){ + do_io(&io_req); + __ubd_finish(req, io_req.error); + } + } + } + else { + if(do_ubd || (req = elv_next_request(q)) == NULL) + return; + err = prepare_request(req, &io_req); + if(!err){ + do_ubd = ubd_handler; + n = os_write_file(thread_fd, (char *) &io_req, + sizeof(io_req)); + if(n != sizeof(io_req)) + printk("write to io thread failed, " + "errno = %d\n", -n); } } - in_ubd = 0; } static int ubd_ioctl(struct inode * inode, struct file * file, @@ -1241,95 +1271,131 @@ int create_cow_file(char *cow_file, char *backing_file, struct openflags flags, return(err); } -void do_io(struct io_thread_req *req, struct request *r, unsigned long *bitmap) +static int update_bitmap(struct io_thread_req *req) { - struct ubd_aio *aio; - struct bitmap_io *bitmap_io = NULL; - char *buf; - void *bitmap_buf = NULL; - unsigned long len, sector; - int nsectors, start, end, bit, err; - __u64 off; - - if(req->bitmap_start != -1){ - /* Round up to the nearest word */ - int round = sizeof(unsigned long); - len = (req->bitmap_end - req->bitmap_start + - round * 8 - 1) / (round * 8); - len *= round; - - off = req->bitmap_start / (8 * round); - off *= round; - - bitmap_io = kmalloc(sizeof(*bitmap_io), GFP_KERNEL); - if(bitmap_io == NULL){ - printk("Failed to kmalloc bitmap IO\n"); - req->error = 1; - return; - } + int n; - bitmap_buf = kmalloc(len, GFP_KERNEL); - if(bitmap_buf == NULL){ - printk("do_io : kmalloc of bitmap chunk " - "failed\n"); - kfree(bitmap_io); - req->error = 1; - return; - } - memcpy(bitmap_buf, &bitmap[off / sizeof(bitmap[0])], len); - - *bitmap_io = ((struct bitmap_io) - { .count = ATOMIC_INIT(0), - .aio = INIT_AIO(AIO_WRITE, req->fds[1], - bitmap_buf, len, - req->bitmap_offset + off, - ubd_reply_fd) } ); - } + if(req->cow_offset == -1) + return(0); - nsectors = req->length / req->sectorsize; - start = 0; - end = nsectors; - bit = 0; - do { - if(bitmap != NULL){ - sector = req->offset / req->sectorsize; - bit = ubd_test_bit(sector + start, bitmap); - end = start; - while((end < nsectors) && - (ubd_test_bit(sector + end, bitmap) == bit)) - end++; - } + n = os_seek_file(req->fds[1], req->cow_offset); + if(n < 0){ + printk("do_io - bitmap lseek failed : err = %d\n", -n); + return(1); + } - off = req->offsets[bit] + req->offset + - start * req->sectorsize; - len = (end - start) * req->sectorsize; - buf = &req->buffer[start * req->sectorsize]; + n = os_write_file(req->fds[1], &req->bitmap_words, + sizeof(req->bitmap_words)); + if(n != sizeof(req->bitmap_words)){ + printk("do_io - bitmap update failed, err = %d fd = %d\n", -n, + req->fds[1]); + return(1); + } - aio = kmalloc(sizeof(*aio), GFP_KERNEL); - if(aio == NULL){ - req->error = 1; - return; - } + return(0); +} - *aio = ((struct ubd_aio) - { .aio = INIT_AIO(req->op, req->fds[bit], buf, - len, off, ubd_reply_fd), - .len = len, - .req = r, - .bitmap = bitmap_io, - .bitmap_buf = bitmap_buf }); - - if(aio->bitmap != NULL) - atomic_inc(&aio->bitmap->count); - - err = submit_aio(&aio->aio); - if(err){ - printk("do_io - submit_aio failed, " - "err = %d\n", err); - req->error = 1; - return; - } +void do_io(struct io_thread_req *req) +{ + char *buf; + unsigned long len; + int n, nsectors, start, end, bit; + int err; + __u64 off; + + nsectors = req->length / req->sectorsize; + start = 0; + do { + bit = ubd_test_bit(start, (unsigned char *) &req->sector_mask); + end = start; + while((end < nsectors) && + (ubd_test_bit(end, (unsigned char *) + &req->sector_mask) == bit)) + end++; + + off = req->offset + req->offsets[bit] + + start * req->sectorsize; + len = (end - start) * req->sectorsize; + buf = &req->buffer[start * req->sectorsize]; + + err = os_seek_file(req->fds[bit], off); + if(err < 0){ + printk("do_io - lseek failed : err = %d\n", -err); + req->error = 1; + return; + } + if(req->op == UBD_READ){ + n = 0; + do { + buf = &buf[n]; + len -= n; + n = os_read_file(req->fds[bit], buf, len); + if (n < 0) { + printk("do_io - read failed, err = %d " + "fd = %d\n", -n, req->fds[bit]); + req->error = 1; + return; + } + } while((n < len) && (n != 0)); + if (n < len) memset(&buf[n], 0, len - n); + } else { + n = os_write_file(req->fds[bit], buf, len); + if(n != len){ + printk("do_io - write failed err = %d " + "fd = %d\n", -n, req->fds[bit]); + req->error = 1; + return; + } + } + + start = end; + } while(start < nsectors); - start = end; - } while(start < nsectors); + req->error = update_bitmap(req); } + +/* Changed in start_io_thread, which is serialized by being called only + * from ubd_init, which is an initcall. + */ +int kernel_fd = -1; + +/* Only changed by the io thread */ +int io_count = 0; + +int io_thread(void *arg) +{ + struct io_thread_req req; + int n; + + ignore_sigwinch_sig(); + while(1){ + n = os_read_file(kernel_fd, &req, sizeof(req)); + if(n != sizeof(req)){ + if(n < 0) + printk("io_thread - read failed, fd = %d, " + "err = %d\n", kernel_fd, -n); + else { + printk("io_thread - short read, fd = %d, " + "length = %d\n", kernel_fd, n); + } + continue; + } + io_count++; + do_io(&req); + n = os_write_file(kernel_fd, &req, sizeof(req)); + if(n != sizeof(req)) + printk("io_thread - write failed, fd = %d, err = %d\n", + kernel_fd, -n); + } +} + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ diff --git a/arch/um/drivers/ubd_user.c b/arch/um/drivers/ubd_user.c new file mode 100644 index 00000000000..b94d2bc4fe0 --- /dev/null +++ b/arch/um/drivers/ubd_user.c @@ -0,0 +1,75 @@ +/* + * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2001 Ridgerun,Inc (glonnon@ridgerun.com) + * Licensed under the GPL + */ + +#include <stddef.h> +#include <unistd.h> +#include <errno.h> +#include <sched.h> +#include <signal.h> +#include <string.h> +#include <netinet/in.h> +#include <sys/time.h> +#include <sys/socket.h> +#include <sys/mman.h> +#include <sys/param.h> +#include "asm/types.h" +#include "user_util.h" +#include "kern_util.h" +#include "user.h" +#include "ubd_user.h" +#include "os.h" +#include "cow.h" + +#include <endian.h> +#include <byteswap.h> + +void ignore_sigwinch_sig(void) +{ + signal(SIGWINCH, SIG_IGN); +} + +int start_io_thread(unsigned long sp, int *fd_out) +{ + int pid, fds[2], err; + + err = os_pipe(fds, 1, 1); + if(err < 0){ + printk("start_io_thread - os_pipe failed, err = %d\n", -err); + goto out; + } + + kernel_fd = fds[0]; + *fd_out = fds[1]; + + pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM | SIGCHLD, + NULL); + if(pid < 0){ + printk("start_io_thread - clone failed : errno = %d\n", errno); + err = -errno; + goto out_close; + } + + return(pid); + + out_close: + os_close_file(fds[0]); + os_close_file(fds[1]); + kernel_fd = -1; + *fd_out = -1; + out: + return(err); +} + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ diff --git a/arch/um/drivers/xterm.c b/arch/um/drivers/xterm.c index 90e0e5ff451..aaa63666104 100644 --- a/arch/um/drivers/xterm.c +++ b/arch/um/drivers/xterm.c @@ -14,7 +14,6 @@ #include <sys/socket.h> #include "kern_util.h" #include "chan_user.h" -#include "helper.h" #include "user_util.h" #include "user.h" #include "os.h" @@ -195,13 +194,6 @@ static void xterm_free(void *d) free(d); } -static int xterm_console_write(int fd, const char *buf, int n, void *d) -{ - struct xterm_chan *data = d; - - return(generic_console_write(fd, buf, n, &data->tt)); -} - struct chan_ops xterm_ops = { .type = "xterm", .init = xterm_init, @@ -209,7 +201,7 @@ struct chan_ops xterm_ops = { .close = xterm_close, .read = generic_read, .write = generic_write, - .console_write = xterm_console_write, + .console_write = generic_console_write, .window_size = generic_window_size, .free = xterm_free, .winch = 1, diff --git a/arch/um/include/aio.h b/arch/um/include/aio.h index 83f16877ab0..423bae9153f 100644 --- a/arch/um/include/aio.h +++ b/arch/um/include/aio.h @@ -14,27 +14,15 @@ struct aio_thread_reply { }; struct aio_context { - enum aio_type type; - int fd; - void *data; - int len; - unsigned long long offset; int reply_fd; struct aio_context *next; }; -#define INIT_AIO(aio_type, aio_fd, aio_data, aio_len, aio_offset, \ - aio_reply_fd) \ - { .type = aio_type, \ - .fd = aio_fd, \ - .data = aio_data, \ - .len = aio_len, \ - .offset = aio_offset, \ - .reply_fd = aio_reply_fd } - #define INIT_AIO_CONTEXT { .reply_fd = -1, \ .next = NULL } -extern int submit_aio(struct aio_context *aio); +extern int submit_aio(enum aio_type type, int fd, char *buf, int len, + unsigned long long offset, int reply_fd, + struct aio_context *aio); #endif diff --git a/arch/um/include/chan_user.h b/arch/um/include/chan_user.h index f77d9aa4c16..659bb3cac32 100644 --- a/arch/um/include/chan_user.h +++ b/arch/um/include/chan_user.h @@ -25,7 +25,7 @@ struct chan_ops { void (*close)(int, void *); int (*read)(int, char *, void *); int (*write)(int, const char *, int, void *); - int (*console_write)(int, const char *, int, void *); + int (*console_write)(int, const char *, int); int (*window_size)(int, void *, unsigned short *, unsigned short *); void (*free)(void *); int winch; @@ -37,7 +37,7 @@ extern struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops, tty_ops, extern void generic_close(int fd, void *unused); extern int generic_read(int fd, char *c_out, void *unused); extern int generic_write(int fd, const char *buf, int n, void *unused); -extern int generic_console_write(int fd, const char *buf, int n, void *state); +extern int generic_console_write(int fd, const char *buf, int n); extern int generic_window_size(int fd, void *unused, unsigned short *rows_out, unsigned short *cols_out); extern void generic_free(void *data); diff --git a/arch/um/include/common-offsets.h b/arch/um/include/common-offsets.h index 782ac3a3baf..356390d1f8b 100644 --- a/arch/um/include/common-offsets.h +++ b/arch/um/include/common-offsets.h @@ -1,7 +1,7 @@ /* for use by sys-$SUBARCH/kernel-offsets.c */ -OFFSET(TASK_REGS, task_struct, thread.regs); -OFFSET(TASK_PID, task_struct, pid); +OFFSET(HOST_TASK_REGS, task_struct, thread.regs); +OFFSET(HOST_TASK_PID, task_struct, pid); DEFINE(UM_KERN_PAGE_SIZE, PAGE_SIZE); DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC); DEFINE_STR(UM_KERN_EMERG, KERN_EMERG); diff --git a/arch/um/include/helper.h b/arch/um/include/helper.h deleted file mode 100644 index 162ac31192f..00000000000 --- a/arch/um/include/helper.h +++ /dev/null @@ -1,27 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#ifndef __HELPER_H__ -#define __HELPER_H__ - -extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, - unsigned long *stack_out); -extern int run_helper_thread(int (*proc)(void *), void *arg, - unsigned int flags, unsigned long *stack_out, - int stack_order); -extern int helper_wait(int pid); - -#endif - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/include/mem_user.h b/arch/um/include/mem_user.h index 9fef4123a65..a1064c5823b 100644 --- a/arch/um/include/mem_user.h +++ b/arch/um/include/mem_user.h @@ -57,7 +57,7 @@ extern int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem); extern unsigned long get_vm(unsigned long len); extern void setup_physmem(unsigned long start, unsigned long usable, - unsigned long len, unsigned long highmem); + unsigned long len, unsigned long long highmem); extern void add_iomem(char *name, int fd, unsigned long size); extern unsigned long phys_offset(unsigned long phys); extern void unmap_physmem(void); diff --git a/arch/um/include/net_kern.h b/arch/um/include/net_kern.h index 1c07949a13d..f7de6df60dd 100644 --- a/arch/um/include/net_kern.h +++ b/arch/um/include/net_kern.h @@ -6,10 +6,11 @@ #ifndef __UM_NET_KERN_H #define __UM_NET_KERN_H -#include "linux/netdevice.h" -#include "linux/skbuff.h" -#include "linux/socket.h" -#include "linux/list.h" +#include <linux/netdevice.h> +#include <linux/platform_device.h> +#include <linux/skbuff.h> +#include <linux/socket.h> +#include <linux/list.h> struct uml_net { struct list_head list; diff --git a/arch/um/include/net_user.h b/arch/um/include/net_user.h index 89885a77a77..800c403920b 100644 --- a/arch/um/include/net_user.h +++ b/arch/um/include/net_user.h @@ -25,7 +25,7 @@ struct net_user_info { }; extern void ether_user_init(void *data, void *dev); -extern void dev_ip_addr(void *d, char *buf, char *bin_buf); +extern void dev_ip_addr(void *d, unsigned char *bin_buf); extern void set_ether_mac(void *d, unsigned char *addr); extern void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *, void *), diff --git a/arch/um/include/os.h b/arch/um/include/os.h index 583329d0a53..2cccfa5b8ab 100644 --- a/arch/um/include/os.h +++ b/arch/um/include/os.h @@ -6,6 +6,7 @@ #ifndef __OS_H__ #define __OS_H__ +#include "uml-config.h" #include "asm/types.h" #include "../os/include/file.h" @@ -157,8 +158,16 @@ extern int os_lock_file(int fd, int excl); extern void os_early_checks(void); extern int can_do_skas(void); +/* Make sure they are clear when running in TT mode. Required by + * SEGV_MAYBE_FIXABLE */ +#ifdef UML_CONFIG_MODE_SKAS +#define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0) +#else +#define clear_can_do_skas() do {} while (0) +#endif + /* mem.c */ -extern int create_mem_file(unsigned long len); +extern int create_mem_file(unsigned long long len); /* process.c */ extern unsigned long os_process_pc(int pid); @@ -190,6 +199,20 @@ extern void forward_pending_sigio(int target); extern int start_fork_tramp(void *arg, unsigned long temp_stack, int clone_flags, int (*tramp)(void *)); +/* uaccess.c */ +extern unsigned long __do_user_copy(void *to, const void *from, int n, + void **fault_addr, void **fault_catcher, + void (*op)(void *to, const void *from, + int n), int *faulted_out); + +/* helper.c */ +extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, + unsigned long *stack_out); +extern int run_helper_thread(int (*proc)(void *), void *arg, + unsigned int flags, unsigned long *stack_out, + int stack_order); +extern int helper_wait(int pid); + #endif /* diff --git a/arch/um/include/registers.h b/arch/um/include/registers.h index 0a35e6d0baa..4892e5fcef0 100644 --- a/arch/um/include/registers.h +++ b/arch/um/include/registers.h @@ -15,16 +15,6 @@ extern void save_registers(int pid, union uml_pt_regs *regs); extern void restore_registers(int pid, union uml_pt_regs *regs); extern void init_registers(int pid); extern void get_safe_registers(unsigned long * regs); +extern void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer); #endif - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/include/skas_ptregs.h b/arch/um/include/skas_ptregs.h new file mode 100644 index 00000000000..73db19e9c07 --- /dev/null +++ b/arch/um/include/skas_ptregs.h @@ -0,0 +1,6 @@ +#ifndef __SKAS_PT_REGS_ +#define __SKAS_PT_REGS_ + +#include <user_constants.h> + +#endif diff --git a/arch/um/include/sysdep-i386/sc.h b/arch/um/include/sysdep-i386/sc.h new file mode 100644 index 00000000000..c57d1780ad3 --- /dev/null +++ b/arch/um/include/sysdep-i386/sc.h @@ -0,0 +1,44 @@ +#ifndef __SYSDEP_I386_SC_H +#define __SYSDEP_I386_SC_H + +#include <user_constants.h> + +#define SC_OFFSET(sc, field) \ + *((unsigned long *) &(((char *) (sc))[HOST_##field])) +#define SC_FP_OFFSET(sc, field) \ + *((unsigned long *) &(((char *) (SC_FPSTATE(sc)))[HOST_##field])) +#define SC_FP_OFFSET_PTR(sc, field, type) \ + ((type *) &(((char *) (SC_FPSTATE(sc)))[HOST_##field])) + +#define SC_IP(sc) SC_OFFSET(sc, SC_IP) +#define SC_SP(sc) SC_OFFSET(sc, SC_SP) +#define SC_FS(sc) SC_OFFSET(sc, SC_FS) +#define SC_GS(sc) SC_OFFSET(sc, SC_GS) +#define SC_DS(sc) SC_OFFSET(sc, SC_DS) +#define SC_ES(sc) SC_OFFSET(sc, SC_ES) +#define SC_SS(sc) SC_OFFSET(sc, SC_SS) +#define SC_CS(sc) SC_OFFSET(sc, SC_CS) +#define SC_EFLAGS(sc) SC_OFFSET(sc, SC_EFLAGS) +#define SC_EAX(sc) SC_OFFSET(sc, SC_EAX) +#define SC_EBX(sc) SC_OFFSET(sc, SC_EBX) +#define SC_ECX(sc) SC_OFFSET(sc, SC_ECX) +#define SC_EDX(sc) SC_OFFSET(sc, SC_EDX) +#define SC_EDI(sc) SC_OFFSET(sc, SC_EDI) +#define SC_ESI(sc) SC_OFFSET(sc, SC_ESI) +#define SC_EBP(sc) SC_OFFSET(sc, SC_EBP) +#define SC_TRAPNO(sc) SC_OFFSET(sc, SC_TRAPNO) +#define SC_ERR(sc) SC_OFFSET(sc, SC_ERR) +#define SC_CR2(sc) SC_OFFSET(sc, SC_CR2) +#define SC_FPSTATE(sc) SC_OFFSET(sc, SC_FPSTATE) +#define SC_SIGMASK(sc) SC_OFFSET(sc, SC_SIGMASK) +#define SC_FP_CW(sc) SC_FP_OFFSET(sc, SC_FP_CW) +#define SC_FP_SW(sc) SC_FP_OFFSET(sc, SC_FP_SW) +#define SC_FP_TAG(sc) SC_FP_OFFSET(sc, SC_FP_TAG) +#define SC_FP_IPOFF(sc) SC_FP_OFFSET(sc, SC_FP_IPOFF) +#define SC_FP_CSSEL(sc) SC_FP_OFFSET(sc, SC_FP_CSSEL) +#define SC_FP_DATAOFF(sc) SC_FP_OFFSET(sc, SC_FP_DATAOFF) +#define SC_FP_DATASEL(sc) SC_FP_OFFSET(sc, SC_FP_DATASEL) +#define SC_FP_ST(sc) SC_FP_OFFSET_PTR(sc, SC_FP_ST, struct _fpstate) +#define SC_FXSR_ENV(sc) SC_FP_OFFSET_PTR(sc, SC_FXSR_ENV, void) + +#endif diff --git a/arch/um/include/sysdep-i386/sigcontext.h b/arch/um/include/sysdep-i386/sigcontext.h index 1fe72926516..23fd2644d7e 100644 --- a/arch/um/include/sysdep-i386/sigcontext.h +++ b/arch/um/include/sysdep-i386/sigcontext.h @@ -6,6 +6,7 @@ #ifndef __SYS_SIGCONTEXT_I386_H #define __SYS_SIGCONTEXT_I386_H +#include "uml-config.h" #include <sysdep/sc.h> #define IP_RESTART_SYSCALL(ip) ((ip) -= 2) @@ -26,7 +27,14 @@ #define SC_START_SYSCALL(sc) do SC_EAX(sc) = -ENOSYS; while(0) /* This is Page Fault */ -#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14) +#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14) + +/* SKAS3 has no trap_no on i386, but get_skas_faultinfo() sets it to 0. */ +#ifdef UML_CONFIG_MODE_SKAS +#define SEGV_MAYBE_FIXABLE(fi) ((fi)->trap_no == 0 && ptrace_faultinfo) +#else +#define SEGV_MAYBE_FIXABLE(fi) 0 +#endif extern unsigned long *sc_sigmask(void *sc_ptr); extern int sc_get_fpregs(unsigned long buf, void *sc_ptr); diff --git a/arch/um/include/sysdep-i386/stub.h b/arch/um/include/sysdep-i386/stub.h index d3699fe1c61..6ba8cbbe0d3 100644 --- a/arch/um/include/sysdep-i386/stub.h +++ b/arch/um/include/sysdep-i386/stub.h @@ -16,45 +16,78 @@ extern void stub_clone_handler(void); #define STUB_MMAP_NR __NR_mmap2 #define MMAP_OFFSET(o) ((o) >> PAGE_SHIFT) +static inline long stub_syscall0(long syscall) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall)); + + return ret; +} + +static inline long stub_syscall1(long syscall, long arg1) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1)); + + return ret; +} + static inline long stub_syscall2(long syscall, long arg1, long arg2) { long ret; - __asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx"); - __asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx"); - __asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax"); - __asm__("int $0x80;" : : : "%eax"); - __asm__ __volatile__("movl %%eax, %0; " : "=g" (ret) :); - return(ret); + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2)); + + return ret; } static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3) { - __asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx"); - return(stub_syscall2(syscall, arg1, arg2)); + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2), "d" (arg3)); + + return ret; } static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3, long arg4) { - __asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi"); - return(stub_syscall3(syscall, arg1, arg2, arg3)); + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2), "d" (arg3), "S" (arg4)); + + return ret; +} + +static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3, + long arg4, long arg5) +{ + long ret; + + __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1), + "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5)); + + return ret; } static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3, long arg4, long arg5, long arg6) { long ret; - __asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax"); - __asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx"); - __asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx"); - __asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx"); - __asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi"); - __asm__("movl %0, %%edi; " : : "g" (arg5) : "%edi"); - __asm__ __volatile__("pushl %%ebp ; movl %1, %%ebp; " - "int $0x80; popl %%ebp ; " - "movl %%eax, %0; " : "=g" (ret) : "g" (arg6) : "%eax"); - return(ret); + + __asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; " + "int $0x80 ; pop %%ebp" + : "=a" (ret) + : "g" (syscall), "b" (arg1), "c" (arg2), "d" (arg3), + "S" (arg4), "D" (arg5), "0" (arg6)); + + return ret; } static inline void trap_myself(void) diff --git a/arch/um/include/sysdep-i386/syscalls.h b/arch/um/include/sysdep-i386/syscalls.h index a0d5b74d373..57bd79efbee 100644 --- a/arch/um/include/sysdep-i386/syscalls.h +++ b/arch/um/include/sysdep-i386/syscalls.h @@ -11,7 +11,6 @@ typedef long syscall_handler_t(struct pt_regs); /* Not declared on x86, incompatible declarations on x86_64, so these have * to go here rather than in sys_call_table.c */ -extern syscall_handler_t sys_ptrace; extern syscall_handler_t sys_rt_sigaction; extern syscall_handler_t old_mmap_i386; diff --git a/arch/um/include/sysdep-i386/thread.h b/arch/um/include/sysdep-i386/thread.h new file mode 100644 index 00000000000..243fed44d78 --- /dev/null +++ b/arch/um/include/sysdep-i386/thread.h @@ -0,0 +1,11 @@ +#ifndef __UM_THREAD_H +#define __UM_THREAD_H + +#include <kern_constants.h> + +#define TASK_DEBUGREGS(task) ((unsigned long *) &(((char *) (task))[HOST_TASK_DEBUGREGS])) +#ifdef UML_CONFIG_MODE_TT +#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[HOST_TASK_EXTERN_PID])) +#endif + +#endif diff --git a/arch/um/include/sysdep-x86_64/ptrace.h b/arch/um/include/sysdep-x86_64/ptrace.h index 331aa2d1f3f..8d353f0feec 100644 --- a/arch/um/include/sysdep-x86_64/ptrace.h +++ b/arch/um/include/sysdep-x86_64/ptrace.h @@ -183,10 +183,6 @@ struct syscall_args { case RBP: val = UPT_RBP(regs); break; \ case ORIG_RAX: val = UPT_ORIG_RAX(regs); break; \ case CS: val = UPT_CS(regs); break; \ - case DS: val = UPT_DS(regs); break; \ - case ES: val = UPT_ES(regs); break; \ - case FS: val = UPT_FS(regs); break; \ - case GS: val = UPT_GS(regs); break; \ case EFLAGS: val = UPT_EFLAGS(regs); break; \ default : \ panic("Bad register in UPT_REG : %d\n", reg); \ @@ -218,10 +214,6 @@ struct syscall_args { case RBP: UPT_RBP(regs) = __upt_val; break; \ case ORIG_RAX: UPT_ORIG_RAX(regs) = __upt_val; break; \ case CS: UPT_CS(regs) = __upt_val; break; \ - case DS: UPT_DS(regs) = __upt_val; break; \ - case ES: UPT_ES(regs) = __upt_val; break; \ - case FS: UPT_FS(regs) = __upt_val; break; \ - case GS: UPT_GS(regs) = __upt_val; break; \ case EFLAGS: UPT_EFLAGS(regs) = __upt_val; break; \ default : \ panic("Bad register in UPT_SET : %d\n", reg); \ diff --git a/arch/um/include/sysdep-x86_64/sc.h b/arch/um/include/sysdep-x86_64/sc.h new file mode 100644 index 00000000000..a160d9fcc59 --- /dev/null +++ b/arch/um/include/sysdep-x86_64/sc.h @@ -0,0 +1,45 @@ +#ifndef __SYSDEP_X86_64_SC_H +#define __SYSDEP_X86_64_SC_H + +/* Copyright (C) 2003 - 2004 PathScale, Inc + * Released under the GPL + */ + +#include <user_constants.h> + +#define SC_OFFSET(sc, field) \ + *((unsigned long *) &(((char *) (sc))[HOST_##field])) + +#define SC_RBX(sc) SC_OFFSET(sc, SC_RBX) +#define SC_RCX(sc) SC_OFFSET(sc, SC_RCX) +#define SC_RDX(sc) SC_OFFSET(sc, SC_RDX) +#define SC_RSI(sc) SC_OFFSET(sc, SC_RSI) +#define SC_RDI(sc) SC_OFFSET(sc, SC_RDI) +#define SC_RBP(sc) SC_OFFSET(sc, SC_RBP) +#define SC_RAX(sc) SC_OFFSET(sc, SC_RAX) +#define SC_R8(sc) SC_OFFSET(sc, SC_R8) +#define SC_R9(sc) SC_OFFSET(sc, SC_R9) +#define SC_R10(sc) SC_OFFSET(sc, SC_R10) +#define SC_R11(sc) SC_OFFSET(sc, SC_R11) +#define SC_R12(sc) SC_OFFSET(sc, SC_R12) +#define SC_R13(sc) SC_OFFSET(sc, SC_R13) +#define SC_R14(sc) SC_OFFSET(sc, SC_R14) +#define SC_R15(sc) SC_OFFSET(sc, SC_R15) +#define SC_IP(sc) SC_OFFSET(sc, SC_IP) +#define SC_SP(sc) SC_OFFSET(sc, SC_SP) +#define SC_CR2(sc) SC_OFFSET(sc, SC_CR2) +#define SC_ERR(sc) SC_OFFSET(sc, SC_ERR) +#define SC_TRAPNO(sc) SC_OFFSET(sc, SC_TRAPNO) +#define SC_CS(sc) SC_OFFSET(sc, SC_CS) +#define SC_FS(sc) SC_OFFSET(sc, SC_FS) +#define SC_GS(sc) SC_OFFSET(sc, SC_GS) +#define SC_EFLAGS(sc) SC_OFFSET(sc, SC_EFLAGS) +#define SC_SIGMASK(sc) SC_OFFSET(sc, SC_SIGMASK) +#if 0 +#define SC_ORIG_RAX(sc) SC_OFFSET(sc, SC_ORIG_RAX) +#define SC_DS(sc) SC_OFFSET(sc, SC_DS) +#define SC_ES(sc) SC_OFFSET(sc, SC_ES) +#define SC_SS(sc) SC_OFFSET(sc, SC_SS) +#endif + +#endif diff --git a/arch/um/include/sysdep-x86_64/sigcontext.h b/arch/um/include/sysdep-x86_64/sigcontext.h index 2a78260d15a..41073235e7a 100644 --- a/arch/um/include/sysdep-x86_64/sigcontext.h +++ b/arch/um/include/sysdep-x86_64/sigcontext.h @@ -31,7 +31,10 @@ #define SC_START_SYSCALL(sc) do SC_RAX(sc) = -ENOSYS; while(0) /* This is Page Fault */ -#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14) +#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14) + +/* No broken SKAS API, which doesn't pass trap_no, here. */ +#define SEGV_MAYBE_FIXABLE(fi) 0 extern unsigned long *sc_sigmask(void *sc_ptr); diff --git a/arch/um/include/sysdep-x86_64/stub.h b/arch/um/include/sysdep-x86_64/stub.h index f599058d826..c41689c13dc 100644 --- a/arch/um/include/sysdep-x86_64/stub.h +++ b/arch/um/include/sysdep-x86_64/stub.h @@ -6,7 +6,6 @@ #ifndef __SYSDEP_STUB_H #define __SYSDEP_STUB_H -#include <asm/ptrace.h> #include <asm/unistd.h> #include <sysdep/ptrace_user.h> @@ -17,37 +16,83 @@ extern void stub_clone_handler(void); #define STUB_MMAP_NR __NR_mmap #define MMAP_OFFSET(o) (o) +#define __syscall_clobber "r11","rcx","memory" +#define __syscall "syscall" + +static inline long stub_syscall0(long syscall) +{ + long ret; + + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall) : __syscall_clobber ); + + return ret; +} + static inline long stub_syscall2(long syscall, long arg1, long arg2) { long ret; - __asm__("movq %0, %%rsi; " : : "g" (arg2) : "%rsi"); - __asm__("movq %0, %%rdi; " : : "g" (arg1) : "%rdi"); - __asm__("movq %0, %%rax; " : : "g" (syscall) : "%rax"); - __asm__("syscall;" : : : "%rax", "%r11", "%rcx"); - __asm__ __volatile__("movq %%rax, %0; " : "=g" (ret) :); - return(ret); + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2) : __syscall_clobber ); + + return ret; } static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3) { - __asm__("movq %0, %%rdx; " : : "g" (arg3) : "%rdx"); - return(stub_syscall2(syscall, arg1, arg2)); + long ret; + + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3) + : __syscall_clobber ); + + return ret; } static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3, long arg4) { - __asm__("movq %0, %%r10; " : : "g" (arg4) : "%r10"); - return(stub_syscall3(syscall, arg1, arg2, arg3)); + long ret; + + __asm__ volatile ("movq %5,%%r10 ; " __syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4) + : __syscall_clobber, "r10" ); + + return ret; +} + +static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3, + long arg4, long arg5) +{ + long ret; + + __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; " __syscall + : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4), "g" (arg5) + : __syscall_clobber, "r10", "r8" ); + + return ret; } static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3, long arg4, long arg5, long arg6) { - __asm__("movq %0, %%r9; " : : "g" (arg6) : "%r9"); - __asm__("movq %0, %%r8; " : : "g" (arg5) : "%r8"); - return(stub_syscall4(syscall, arg1, arg2, arg3, arg4)); + long ret; + + __asm__ volatile ("movq %5,%%r10 ; movq %6,%%r8 ; " + "movq %7, %%r9; " __syscall : "=a" (ret) + : "0" (syscall), "D" (arg1), "S" (arg2), "d" (arg3), + "g" (arg4), "g" (arg5), "g" (arg6) + : __syscall_clobber, "r10", "r8", "r9" ); + + return ret; } static inline void trap_myself(void) diff --git a/arch/um/include/sysdep-x86_64/thread.h b/arch/um/include/sysdep-x86_64/thread.h new file mode 100644 index 00000000000..cbef3e1697f --- /dev/null +++ b/arch/um/include/sysdep-x86_64/thread.h @@ -0,0 +1,10 @@ +#ifndef __UM_THREAD_H +#define __UM_THREAD_H + +#include <kern_constants.h> + +#ifdef UML_CONFIG_MODE_TT +#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[HOST_TASK_EXTERN_PID])) +#endif + +#endif diff --git a/arch/um/include/task.h b/arch/um/include/task.h new file mode 100644 index 00000000000..6375ba7203c --- /dev/null +++ b/arch/um/include/task.h @@ -0,0 +1,9 @@ +#ifndef __TASK_H +#define __TASK_H + +#include <kern_constants.h> + +#define TASK_REGS(task) ((union uml_pt_regs *) &(((char *) (task))[HOST_TASK_REGS])) +#define TASK_PID(task) *((int *) &(((char *) (task))[HOST_TASK_PID])) + +#endif diff --git a/arch/um/include/tlb.h b/arch/um/include/tlb.h index 45d7da6c3b2..8efc1e0f1b8 100644 --- a/arch/um/include/tlb.h +++ b/arch/um/include/tlb.h @@ -34,7 +34,6 @@ struct host_vm_op { } u; }; -extern void mprotect_kernel_vm(int w); extern void force_flush_all(void); extern void fix_range_common(struct mm_struct *mm, unsigned long start_addr, unsigned long end_addr, int force, diff --git a/arch/um/include/um_uaccess.h b/arch/um/include/um_uaccess.h index 84c0868cd56..f8760a3f43b 100644 --- a/arch/um/include/um_uaccess.h +++ b/arch/um/include/um_uaccess.h @@ -17,8 +17,25 @@ #include "uaccess-skas.h" #endif +#define __under_task_size(addr, size) \ + (((unsigned long) (addr) < TASK_SIZE) && \ + (((unsigned long) (addr) + (size)) < TASK_SIZE)) + +#define __access_ok_vsyscall(type, addr, size) \ + ((type == VERIFY_READ) && \ + ((unsigned long) (addr) >= FIXADDR_USER_START) && \ + ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \ + ((unsigned long) (addr) + (size) >= (unsigned long)(addr))) + +#define __addr_range_nowrap(addr, size) \ + ((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) + #define access_ok(type, addr, size) \ - CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size) + (__addr_range_nowrap(addr, size) && \ + (__under_task_size(addr, size) || \ + __access_ok_vsyscall(type, addr, size) || \ + segment_eq(get_fs(), KERNEL_DS) || \ + CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size))) static inline int copy_from_user(void *to, const void __user *from, int n) { diff --git a/arch/um/include/uml_uaccess.h b/arch/um/include/uml_uaccess.h index f77eb642845..c0df11d06f5 100644 --- a/arch/um/include/uml_uaccess.h +++ b/arch/um/include/uml_uaccess.h @@ -8,10 +8,6 @@ extern int __do_copy_to_user(void *to, const void *from, int n, void **fault_addr, void **fault_catcher); -extern unsigned long __do_user_copy(void *to, const void *from, int n, - void **fault_addr, void **fault_catcher, - void (*op)(void *to, const void *from, - int n), int *faulted_out); void __do_copy(void *to, const void *from, int n); #endif diff --git a/arch/um/include/user.h b/arch/um/include/user.h index 57ee9e26122..0f865ef4691 100644 --- a/arch/um/include/user.h +++ b/arch/um/include/user.h @@ -14,7 +14,9 @@ extern void *um_kmalloc_atomic(int size); extern void kfree(void *ptr); extern int in_aton(char *str); extern int open_gdb_chan(void); -extern int strlcpy(char *, const char *, int); +/* These use size_t, however unsigned long is correct on both i386 and x86_64. */ +extern unsigned long strlcpy(char *, const char *, unsigned long); +extern unsigned long strlcat(char *, const char *, unsigned long); extern void *um_vmalloc(int size); extern void vfree(void *ptr); diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile index 1a0001b3850..3de9d21e36b 100644 --- a/arch/um/kernel/Makefile +++ b/arch/um/kernel/Makefile @@ -7,10 +7,10 @@ extra-y := vmlinux.lds clean-files := obj-y = config.o exec_kern.o exitcode.o \ - helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o physmem.o \ + init_task.o irq.o irq_user.o ksyms.o mem.o physmem.o \ process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \ signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o time.o \ - time_kern.o tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o \ + time_kern.o tlb.o trap_kern.o trap_user.o uaccess.o um_arch.o \ umid.o user_util.o obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o @@ -24,8 +24,7 @@ obj-$(CONFIG_MODE_SKAS) += skas/ user-objs-$(CONFIG_TTY_LOG) += tty_log.o -USER_OBJS := $(user-objs-y) config.o helper.o main.o time.o tty_log.o umid.o \ - user_util.o +USER_OBJS := $(user-objs-y) config.o time.o tty_log.o umid.o user_util.o include arch/um/scripts/Makefile.rules diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index dcd81497199..bbf94bf2921 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -9,7 +9,6 @@ #include "linux/kernel.h" #include "linux/module.h" #include "linux/smp.h" -#include "linux/irq.h" #include "linux/kernel_stat.h" #include "linux/interrupt.h" #include "linux/random.h" diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c index a97a72e516a..7713e7a6f47 100644 --- a/arch/um/kernel/ksyms.c +++ b/arch/um/kernel/ksyms.c @@ -20,7 +20,6 @@ #include "user_util.h" #include "mem_user.h" #include "os.h" -#include "helper.h" EXPORT_SYMBOL(stop); EXPORT_SYMBOL(uml_physmem); diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index ea008b031a8..fa4f915be5c 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -234,8 +234,8 @@ void paging_init(void) empty_bad_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE); for(i=0;i<sizeof(zones_size)/sizeof(zones_size[0]);i++) zones_size[i] = 0; - zones_size[0] = (end_iomem >> PAGE_SHIFT) - (uml_physmem >> PAGE_SHIFT); - zones_size[2] = highmem >> PAGE_SHIFT; + zones_size[ZONE_DMA] = (end_iomem >> PAGE_SHIFT) - (uml_physmem >> PAGE_SHIFT); + zones_size[ZONE_HIGHMEM] = highmem >> PAGE_SHIFT; free_area_init(zones_size); /* @@ -252,7 +252,7 @@ void paging_init(void) #endif } -struct page *arch_validate(struct page *page, int mask, int order) +struct page *arch_validate(struct page *page, gfp_t mask, int order) { unsigned long addr, zero = 0; int i; diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c index ea670fcc8af..f3b583a878a 100644 --- a/arch/um/kernel/physmem.c +++ b/arch/um/kernel/physmem.c @@ -246,7 +246,7 @@ int is_remapped(void *virt) /* Changed during early boot */ unsigned long high_physmem; -extern unsigned long physmem_size; +extern unsigned long long physmem_size; int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem) { @@ -321,7 +321,7 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len, extern int __syscall_stub_start, __binary_start; void setup_physmem(unsigned long start, unsigned long reserve_end, - unsigned long len, unsigned long highmem) + unsigned long len, unsigned long long highmem) { unsigned long reserve = reserve_end - start; int pfn = PFN_UP(__pa(reserve_end)); diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c index 39cf568ccfa..34b54a3e213 100644 --- a/arch/um/kernel/process_kern.c +++ b/arch/um/kernel/process_kern.c @@ -80,9 +80,10 @@ void free_stack(unsigned long stack, int order) unsigned long alloc_stack(int order, int atomic) { unsigned long page; - int flags = GFP_KERNEL; + gfp_t flags = GFP_KERNEL; - if(atomic) flags |= GFP_ATOMIC; + if (atomic) + flags = GFP_ATOMIC; page = __get_free_pages(flags, order); if(page == 0) return(0); @@ -221,6 +222,7 @@ void *um_virt_to_phys(struct task_struct *task, unsigned long addr, pud_t *pud; pmd_t *pmd; pte_t *pte; + pte_t ptent; if(task->mm == NULL) return(ERR_PTR(-EINVAL)); @@ -237,12 +239,13 @@ void *um_virt_to_phys(struct task_struct *task, unsigned long addr, return(ERR_PTR(-EINVAL)); pte = pte_offset_kernel(pmd, addr); - if(!pte_present(*pte)) + ptent = *pte; + if(!pte_present(ptent)) return(ERR_PTR(-EINVAL)); if(pte_out != NULL) - *pte_out = *pte; - return((void *) (pte_val(*pte) & PAGE_MASK) + (addr & ~PAGE_MASK)); + *pte_out = ptent; + return((void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK)); } char *current_cmd(void) diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c index 71af4d50389..98e09395c09 100644 --- a/arch/um/kernel/ptrace.c +++ b/arch/um/kernel/ptrace.c @@ -43,53 +43,10 @@ void ptrace_disable(struct task_struct *child) extern int peek_user(struct task_struct * child, long addr, long data); extern int poke_user(struct task_struct * child, long addr, long data); -long sys_ptrace(long request, long pid, long addr, long data) +long arch_ptrace(struct task_struct *child, long request, long addr, long data) { - struct task_struct *child; int i, ret; - lock_kernel(); - ret = -EPERM; - if (request == PTRACE_TRACEME) { - /* are we already being traced? */ - if (current->ptrace & PT_PTRACED) - goto out; - - ret = security_ptrace(current->parent, current); - if (ret) - goto out; - - /* set the ptrace bit in the process flags. */ - current->ptrace |= PT_PTRACED; - ret = 0; - goto out; - } - ret = -ESRCH; - read_lock(&tasklist_lock); - child = find_task_by_pid(pid); - if (child) - get_task_struct(child); - read_unlock(&tasklist_lock); - if (!child) - goto out; - - ret = -EPERM; - if (pid == 1) /* you may not mess with init */ - goto out_tsk; - - if (request == PTRACE_ATTACH) { - ret = ptrace_attach(child); - goto out_tsk; - } - -#ifdef SUBACH_PTRACE_SPECIAL - SUBARCH_PTRACE_SPECIAL(child,request,addr,data); -#endif - - ret = ptrace_check_attach(child, request == PTRACE_KILL); - if (ret < 0) - goto out_tsk; - switch (request) { /* when I and D space are separate, these will need to be fixed. */ case PTRACE_PEEKTEXT: /* read word at location addr. */ @@ -282,10 +239,7 @@ long sys_ptrace(long request, long pid, long addr, long data) ret = ptrace_request(child, request, addr, data); break; } - out_tsk: - put_task_struct(child); - out: - unlock_kernel(); + return ret; } diff --git a/arch/um/kernel/sigio_user.c b/arch/um/kernel/sigio_user.c index e89218958f3..48b1f644b9a 100644 --- a/arch/um/kernel/sigio_user.c +++ b/arch/um/kernel/sigio_user.c @@ -18,7 +18,6 @@ #include "kern_util.h" #include "user_util.h" #include "sigio.h" -#include "helper.h" #include "os.h" /* Changed during early boot */ @@ -225,7 +224,7 @@ static int need_poll(int n) next_poll.used = n; return(0); } - if(next_poll.poll != NULL) kfree(next_poll.poll); + kfree(next_poll.poll); next_poll.poll = um_kmalloc_atomic(n * sizeof(struct pollfd)); if(next_poll.poll == NULL){ printk("need_poll : failed to allocate new pollfds\n"); @@ -340,7 +339,7 @@ static int setup_initial_poll(int fd) { struct pollfd *p; - p = um_kmalloc(sizeof(struct pollfd)); + p = um_kmalloc_atomic(sizeof(struct pollfd)); if(p == NULL){ printk("setup_initial_poll : failed to allocate poll\n"); return(-1); diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile index db36c7c9594..8de471b59c1 100644 --- a/arch/um/kernel/skas/Makefile +++ b/arch/um/kernel/skas/Makefile @@ -6,8 +6,6 @@ obj-y := clone.o exec_kern.o mem.o mem_user.o mmu.o process.o process_kern.o \ syscall.o tlb.o trap_user.o uaccess.o -subdir- := util - USER_OBJS := process.o clone.o include arch/um/scripts/Makefile.rules diff --git a/arch/um/kernel/skas/clone.c b/arch/um/kernel/skas/clone.c index 4dc55f10cd1..cb37ce9124a 100644 --- a/arch/um/kernel/skas/clone.c +++ b/arch/um/kernel/skas/clone.c @@ -9,18 +9,24 @@ #include "stub-data.h" #include "uml-config.h" #include "sysdep/stub.h" +#include "kern_constants.h" /* This is in a separate file because it needs to be compiled with any * extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled + * + * Use UM_KERN_PAGE_SIZE instead of PAGE_SIZE because that calls getpagesize + * on some systems. */ + +#define STUB_DATA(field) (((struct stub_data *) UML_CONFIG_STUB_DATA)->field) + void __attribute__ ((__section__ (".__syscall_stub"))) stub_clone_handler(void) { long err; - struct stub_data *from = (struct stub_data *) UML_CONFIG_STUB_DATA; err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD, - UML_CONFIG_STUB_DATA + PAGE_SIZE / 2 - + UML_CONFIG_STUB_DATA + UM_KERN_PAGE_SIZE / 2 - sizeof(void *)); if(err != 0) goto out; @@ -30,15 +36,16 @@ stub_clone_handler(void) goto out; err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL, - (long) &from->timer, 0); + (long) &STUB_DATA(timer), 0); if(err) goto out; - err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA, PAGE_SIZE, - PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, - from->fd, from->offset); + err = stub_syscall6(STUB_MMAP_NR, UML_CONFIG_STUB_DATA, + UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE, + MAP_FIXED | MAP_SHARED, STUB_DATA(fd), + STUB_DATA(offset)); out: /* save current result. Parent: pid; child: retcode of mmap */ - from->err = err; + STUB_DATA(err) = err; trap_myself(); } diff --git a/arch/um/kernel/skas/include/mmu-skas.h b/arch/um/kernel/skas/include/mmu-skas.h index 09536f81ee4..44110c521e4 100644 --- a/arch/um/kernel/skas/include/mmu-skas.h +++ b/arch/um/kernel/skas/include/mmu-skas.h @@ -8,6 +8,7 @@ #include "linux/config.h" #include "mm_id.h" +#include "asm/ldt.h" struct mmu_context_skas { struct mm_id id; @@ -15,6 +16,7 @@ struct mmu_context_skas { #ifdef CONFIG_3_LEVEL_PGTABLES unsigned long last_pmd; #endif + uml_ldt_t ldt; }; extern void switch_mm_skas(struct mm_id * mm_idp); diff --git a/arch/um/kernel/skas/include/skas.h b/arch/um/kernel/skas/include/skas.h index 060934740f9..daa2f85b684 100644 --- a/arch/um/kernel/skas/include/skas.h +++ b/arch/um/kernel/skas/include/skas.h @@ -10,7 +10,8 @@ #include "sysdep/ptrace.h" extern int userspace_pid[]; -extern int proc_mm, ptrace_faultinfo; +extern int proc_mm, ptrace_faultinfo, ptrace_ldt; +extern int skas_needs_stub; extern void switch_threads(void *me, void *next); extern void thread_wait(void *sw, void *fb); diff --git a/arch/um/kernel/skas/include/uaccess-skas.h b/arch/um/kernel/skas/include/uaccess-skas.h index 7da0c2def0e..f611f83ad4f 100644 --- a/arch/um/kernel/skas/include/uaccess-skas.h +++ b/arch/um/kernel/skas/include/uaccess-skas.h @@ -9,14 +9,8 @@ #include "asm/errno.h" #include "asm/fixmap.h" -#define access_ok_skas(type, addr, size) \ - ((segment_eq(get_fs(), KERNEL_DS)) || \ - (((unsigned long) (addr) < TASK_SIZE) && \ - ((unsigned long) (addr) + (size) <= TASK_SIZE)) || \ - ((type == VERIFY_READ ) && \ - ((unsigned long) (addr) >= FIXADDR_USER_START) && \ - ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \ - ((unsigned long) (addr) + (size) >= (unsigned long)(addr)))) +/* No SKAS-specific checking. */ +#define access_ok_skas(type, addr, size) 0 extern int copy_from_user_skas(void *to, const void __user *from, int n); extern int copy_to_user_skas(void __user *to, const void *from, int n); diff --git a/arch/um/kernel/skas/mem.c b/arch/um/kernel/skas/mem.c index 147466d7ff4..88ab96c609c 100644 --- a/arch/um/kernel/skas/mem.c +++ b/arch/um/kernel/skas/mem.c @@ -20,7 +20,7 @@ unsigned long set_task_sizes_skas(int arg, unsigned long *host_size_out, *task_size_out = CONFIG_HOST_TASK_SIZE; #else *host_size_out = top; - if (proc_mm && ptrace_faultinfo) + if (!skas_needs_stub) *task_size_out = top; else *task_size_out = CONFIG_STUB_START & PGDIR_MASK; #endif diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c index 240143b616a..677871f1b37 100644 --- a/arch/um/kernel/skas/mmu.c +++ b/arch/um/kernel/skas/mmu.c @@ -15,6 +15,7 @@ #include "asm/mmu.h" #include "asm/pgalloc.h" #include "asm/pgtable.h" +#include "asm/ldt.h" #include "os.h" #include "skas.h" @@ -28,7 +29,6 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc, pmd_t *pmd; pte_t *pte; - spin_lock(&mm->page_table_lock); pgd = pgd_offset(mm, proc); pud = pud_alloc(mm, pgd, proc); if (!pud) @@ -63,7 +63,6 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc, *pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT)); *pte = pte_mkexec(*pte); *pte = pte_wrprotect(*pte); - spin_unlock(&mm->page_table_lock); return(0); out_pmd: @@ -71,19 +70,17 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc, out_pte: pmd_free(pmd); out: - spin_unlock(&mm->page_table_lock); return(-ENOMEM); } int init_new_context_skas(struct task_struct *task, struct mm_struct *mm) { - struct mm_struct *cur_mm = current->mm; - struct mm_id *cur_mm_id = &cur_mm->context.skas.id; - struct mm_id *mm_id = &mm->context.skas.id; + struct mmu_context_skas *from_mm = NULL; + struct mmu_context_skas *to_mm = &mm->context.skas; unsigned long stack = 0; - int from, ret = -ENOMEM; + int from_fd, ret = -ENOMEM; - if(!proc_mm || !ptrace_faultinfo){ + if(skas_needs_stub){ stack = get_zeroed_page(GFP_KERNEL); if(stack == 0) goto out; @@ -105,33 +102,43 @@ int init_new_context_skas(struct task_struct *task, struct mm_struct *mm) mm->nr_ptes--; } - mm_id->stack = stack; + + to_mm->id.stack = stack; + if(current->mm != NULL && current->mm != &init_mm) + from_mm = ¤t->mm->context.skas; if(proc_mm){ - if((cur_mm != NULL) && (cur_mm != &init_mm)) - from = cur_mm_id->u.mm_fd; - else from = -1; + if(from_mm) + from_fd = from_mm->id.u.mm_fd; + else from_fd = -1; - ret = new_mm(from, stack); + ret = new_mm(from_fd, stack); if(ret < 0){ printk("init_new_context_skas - new_mm failed, " "errno = %d\n", ret); goto out_free; } - mm_id->u.mm_fd = ret; + to_mm->id.u.mm_fd = ret; } else { - if((cur_mm != NULL) && (cur_mm != &init_mm)) - mm_id->u.pid = copy_context_skas0(stack, - cur_mm_id->u.pid); - else mm_id->u.pid = start_userspace(stack); + if(from_mm) + to_mm->id.u.pid = copy_context_skas0(stack, + from_mm->id.u.pid); + else to_mm->id.u.pid = start_userspace(stack); + } + + ret = init_new_ldt(to_mm, from_mm); + if(ret < 0){ + printk("init_new_context_skas - init_ldt" + " failed, errno = %d\n", ret); + goto out_free; } return 0; out_free: - if(mm_id->stack != 0) - free_page(mm_id->stack); + if(to_mm->id.stack != 0) + free_page(to_mm->id.stack); out: return ret; } @@ -147,6 +154,7 @@ void destroy_context_skas(struct mm_struct *mm) if(!proc_mm || !ptrace_faultinfo){ free_page(mmu->id.stack); + pte_lock_deinit(virt_to_page(mmu->last_page_table)); pte_free_kernel((pte_t *) mmu->last_page_table); dec_page_state(nr_page_table_pages); #ifdef CONFIG_3_LEVEL_PGTABLES diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c index 5cd0e992978..599d679bd4f 100644 --- a/arch/um/kernel/skas/process.c +++ b/arch/um/kernel/skas/process.c @@ -69,6 +69,17 @@ void wait_stub_done(int pid, int sig, char * fname) if((n < 0) || !WIFSTOPPED(status) || (WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){ + unsigned long regs[FRAME_SIZE]; + if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) + printk("Failed to get registers from stub, " + "errno = %d\n", errno); + else { + int i; + + printk("Stub registers -\n"); + for(i = 0; i < FRAME_SIZE; i++) + printk("\t%d - %lx\n", i, regs[i]); + } panic("%s : failed to wait for SIGUSR1/SIGTRAP, " "pid = %d, n = %d, errno = %d, status = 0x%x\n", fname, pid, n, errno, status); @@ -370,9 +381,9 @@ int copy_context_skas0(unsigned long new_stack, int pid) } /* - * This is used only, if proc_mm is available, while PTRACE_FAULTINFO - * isn't. Opening /proc/mm creates a new mm_context, which lacks the stub-pages - * Thus, we map them using /proc/mm-fd + * This is used only, if stub pages are needed, while proc_mm is + * availabl. Opening /proc/mm creates a new mm_context, which lacks + * the stub-pages. Thus, we map them using /proc/mm-fd */ void map_stub_pages(int fd, unsigned long code, unsigned long data, unsigned long stack) diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c index efe92e8aa2a..9c990253966 100644 --- a/arch/um/kernel/skas/process_kern.c +++ b/arch/um/kernel/skas/process_kern.c @@ -145,7 +145,7 @@ int new_mm(int from, unsigned long stack) "err = %d\n", -n); } - if(!ptrace_faultinfo) + if(skas_needs_stub) map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack); return(fd); diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c index 75195281081..a5a47528dec 100644 --- a/arch/um/kernel/skas/uaccess.c +++ b/arch/um/kernel/skas/uaccess.c @@ -143,7 +143,7 @@ int copy_from_user_skas(void *to, const void __user *from, int n) return(0); } - return(access_ok_skas(VERIFY_READ, from, n) ? + return(access_ok(VERIFY_READ, from, n) ? buffer_op((unsigned long) from, n, 0, copy_chunk_from_user, &to): n); } @@ -164,7 +164,7 @@ int copy_to_user_skas(void __user *to, const void *from, int n) return(0); } - return(access_ok_skas(VERIFY_WRITE, to, n) ? + return(access_ok(VERIFY_WRITE, to, n) ? buffer_op((unsigned long) to, n, 1, copy_chunk_to_user, &from) : n); } @@ -193,7 +193,7 @@ int strncpy_from_user_skas(char *dst, const char __user *src, int count) return(strnlen(dst, count)); } - if(!access_ok_skas(VERIFY_READ, src, 1)) + if(!access_ok(VERIFY_READ, src, 1)) return(-EFAULT); n = buffer_op((unsigned long) src, count, 0, strncpy_chunk_from_user, @@ -221,7 +221,7 @@ int clear_user_skas(void __user *mem, int len) return(0); } - return(access_ok_skas(VERIFY_WRITE, mem, len) ? + return(access_ok(VERIFY_WRITE, mem, len) ? buffer_op((unsigned long) mem, len, 1, clear_chunk, NULL) : len); } diff --git a/arch/um/kernel/skas/util/Makefile b/arch/um/kernel/skas/util/Makefile deleted file mode 100644 index f7b7eba8334..00000000000 --- a/arch/um/kernel/skas/util/Makefile +++ /dev/null @@ -1,5 +0,0 @@ -hostprogs-y := mk_ptregs -always := $(hostprogs-y) - -mk_ptregs-objs := mk_ptregs-$(SUBARCH).o -HOSTCFLAGS_mk_ptregs-$(SUBARCH).o := -I$(objtree)/arch/um diff --git a/arch/um/kernel/skas/util/mk_ptregs-i386.c b/arch/um/kernel/skas/util/mk_ptregs-i386.c deleted file mode 100644 index 1f96e1eeb8a..00000000000 --- a/arch/um/kernel/skas/util/mk_ptregs-i386.c +++ /dev/null @@ -1,49 +0,0 @@ -#include <stdio.h> -#include <user-offsets.h> - -#define SHOW(name) printf("#define %s %d\n", #name, name) - -int main(int argc, char **argv) -{ - printf("/* Automatically generated by " - "arch/um/kernel/skas/util/mk_ptregs */\n"); - printf("\n"); - printf("#ifndef __SKAS_PT_REGS_\n"); - printf("#define __SKAS_PT_REGS_\n"); - printf("\n"); - SHOW(HOST_FRAME_SIZE); - SHOW(HOST_FP_SIZE); - SHOW(HOST_XFP_SIZE); - - SHOW(HOST_IP); - SHOW(HOST_SP); - SHOW(HOST_EFLAGS); - SHOW(HOST_EAX); - SHOW(HOST_EBX); - SHOW(HOST_ECX); - SHOW(HOST_EDX); - SHOW(HOST_ESI); - SHOW(HOST_EDI); - SHOW(HOST_EBP); - SHOW(HOST_CS); - SHOW(HOST_SS); - SHOW(HOST_DS); - SHOW(HOST_FS); - SHOW(HOST_ES); - SHOW(HOST_GS); - - printf("\n"); - printf("#endif\n"); - return(0); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/skas/util/mk_ptregs-x86_64.c b/arch/um/kernel/skas/util/mk_ptregs-x86_64.c deleted file mode 100644 index 5fccbfe35f7..00000000000 --- a/arch/um/kernel/skas/util/mk_ptregs-x86_64.c +++ /dev/null @@ -1,66 +0,0 @@ -/* - * Copyright 2003 PathScale, Inc. - * - * Licensed under the GPL - */ - -#include <stdio.h> -#include <user-offsets.h> - -#define SHOW(name) \ - printf("#define %s (%d / sizeof(unsigned long))\n", #name, name) - -int main(int argc, char **argv) -{ - printf("/* Automatically generated by " - "arch/um/kernel/skas/util/mk_ptregs */\n"); - printf("\n"); - printf("#ifndef __SKAS_PT_REGS_\n"); - printf("#define __SKAS_PT_REGS_\n"); - SHOW(HOST_FRAME_SIZE); - SHOW(HOST_RBX); - SHOW(HOST_RCX); - SHOW(HOST_RDI); - SHOW(HOST_RSI); - SHOW(HOST_RDX); - SHOW(HOST_RBP); - SHOW(HOST_RAX); - SHOW(HOST_R8); - SHOW(HOST_R9); - SHOW(HOST_R10); - SHOW(HOST_R11); - SHOW(HOST_R12); - SHOW(HOST_R13); - SHOW(HOST_R14); - SHOW(HOST_R15); - SHOW(HOST_ORIG_RAX); - SHOW(HOST_CS); - SHOW(HOST_SS); - SHOW(HOST_EFLAGS); -#if 0 - SHOW(HOST_FS); - SHOW(HOST_GS); - SHOW(HOST_DS); - SHOW(HOST_ES); -#endif - - SHOW(HOST_IP); - SHOW(HOST_SP); - printf("#define HOST_FP_SIZE 0\n"); - printf("#define HOST_XFP_SIZE 0\n"); - printf("\n"); - printf("\n"); - printf("#endif\n"); - return(0); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/sysrq.c b/arch/um/kernel/sysrq.c index f80850091e7..b331e970002 100644 --- a/arch/um/kernel/sysrq.c +++ b/arch/um/kernel/sysrq.c @@ -62,13 +62,7 @@ void show_stack(struct task_struct *task, unsigned long *esp) if (esp == NULL) { if (task != current && task != NULL) { - /* XXX: Isn't this bogus? I.e. isn't this the - * *userspace* stack of this task? If not so, use this - * even when task == current (as in i386). - */ esp = (unsigned long *) KSTK_ESP(task); - /* Which one? No actual difference - just coding style.*/ - //esp = (unsigned long *) PT_REGS_IP(&task->thread.regs); } else { esp = (unsigned long *) &esp; } @@ -84,5 +78,5 @@ void show_stack(struct task_struct *task, unsigned long *esp) } printk("Call Trace: \n"); - show_trace(current, esp); + show_trace(task, esp); } diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time_kern.c index 4e08f7545d6..020ca79b8d3 100644 --- a/arch/um/kernel/time_kern.c +++ b/arch/um/kernel/time_kern.c @@ -22,10 +22,6 @@ #include "mode.h" #include "os.h" -u64 jiffies_64 = INITIAL_JIFFIES; - -EXPORT_SYMBOL(jiffies_64); - int hz(void) { return(HZ); diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c index 0a562c3c0fd..f5b0636f9ad 100644 --- a/arch/um/kernel/tlb.c +++ b/arch/um/kernel/tlb.c @@ -193,12 +193,12 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr, r = pte_read(*npte); w = pte_write(*npte); x = pte_exec(*npte); - if(!pte_dirty(*npte)) - w = 0; - if(!pte_young(*npte)){ - r = 0; - w = 0; - } + if (!pte_young(*npte)) { + r = 0; + w = 0; + } else if (!pte_dirty(*npte)) { + w = 0; + } if(force || pte_newpage(*npte)){ if(pte_present(*npte)) ret = add_mmap(addr, diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap_kern.c index 87cc6fd76ce..0d4c10a7360 100644 --- a/arch/um/kernel/trap_kern.c +++ b/arch/um/kernel/trap_kern.c @@ -18,6 +18,7 @@ #include "asm/a.out.h" #include "asm/current.h" #include "asm/irq.h" +#include "sysdep/sigcontext.h" #include "user_util.h" #include "kern_util.h" #include "kern.h" @@ -25,6 +26,9 @@ #include "mconsole_kern.h" #include "mem.h" #include "mem_kern.h" +#ifdef CONFIG_MODE_SKAS +#include "skas.h" +#endif /* Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by segv(). */ int handle_page_fault(unsigned long address, unsigned long ip, @@ -39,6 +43,12 @@ int handle_page_fault(unsigned long address, unsigned long ip, int err = -EFAULT; *code_out = SEGV_MAPERR; + + /* If the fault was during atomic operation, don't take the fault, just + * fail. */ + if (in_atomic()) + goto out_nosemaphore; + down_read(&mm->mmap_sem); vma = find_vma(mm, address); if(!vma) @@ -85,10 +95,20 @@ survive: pte = pte_offset_kernel(pmd, address); } while(!pte_present(*pte)); err = 0; + /* The below warning was added in place of + * pte_mkyoung(); if (is_write) pte_mkdirty(); + * If it's triggered, we'd see normally a hang here (a clean pte is + * marked read-only to emulate the dirty bit). + * However, the generic code can mark a PTE writable but clean on a + * concurrent read fault, triggering this harmlessly. So comment it out. + */ +#if 0 WARN_ON(!pte_young(*pte) || (is_write && !pte_dirty(*pte))); +#endif flush_tlb_page(vma, address); out: up_read(&mm->mmap_sem); +out_nosemaphore: return(err); /* @@ -125,7 +145,15 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, void *sc) } else if(current->mm == NULL) panic("Segfault with no mm"); - err = handle_page_fault(address, ip, is_write, is_user, &si.si_code); + + if (SEGV_IS_FIXABLE(&fi) || SEGV_MAYBE_FIXABLE(&fi)) + err = handle_page_fault(address, ip, is_write, is_user, &si.si_code); + else { + err = -EFAULT; + /* A thread accessed NULL, we get a fault, but CR2 is invalid. + * This code is used in __do_copy_from_user() of TT mode. */ + address = 0; + } catcher = current->thread.fault_catcher; if(!err) diff --git a/arch/um/kernel/tt/include/uaccess-tt.h b/arch/um/kernel/tt/include/uaccess-tt.h index dc2ebfa8c54..b9bfe9c481c 100644 --- a/arch/um/kernel/tt/include/uaccess-tt.h +++ b/arch/um/kernel/tt/include/uaccess-tt.h @@ -19,19 +19,13 @@ extern unsigned long end_vm; extern unsigned long uml_physmem; -#define under_task_size(addr, size) \ - (((unsigned long) (addr) < TASK_SIZE) && \ - (((unsigned long) (addr) + (size)) < TASK_SIZE)) - #define is_stack(addr, size) \ (((unsigned long) (addr) < STACK_TOP) && \ ((unsigned long) (addr) >= STACK_TOP - ABOVE_KMEM) && \ (((unsigned long) (addr) + (size)) <= STACK_TOP)) #define access_ok_tt(type, addr, size) \ - ((type == VERIFY_READ) || (segment_eq(get_fs(), KERNEL_DS)) || \ - (((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) && \ - (under_task_size(addr, size) || is_stack(addr, size)))) + (is_stack(addr, size)) extern unsigned long get_fault_addr(void); diff --git a/arch/um/kernel/tt/tlb.c b/arch/um/kernel/tt/tlb.c index f1d85dbb45b..ae6217c8613 100644 --- a/arch/um/kernel/tt/tlb.c +++ b/arch/um/kernel/tt/tlb.c @@ -74,42 +74,6 @@ void flush_tlb_kernel_range_tt(unsigned long start, unsigned long end) atomic_inc(&vmchange_seq); } -static void protect_vm_page(unsigned long addr, int w, int must_succeed) -{ - int err; - - err = protect_memory(addr, PAGE_SIZE, 1, w, 1, must_succeed); - if(err == 0) return; - else if((err == -EFAULT) || (err == -ENOMEM)){ - flush_tlb_kernel_range(addr, addr + PAGE_SIZE); - protect_vm_page(addr, w, 1); - } - else panic("protect_vm_page : protect failed, errno = %d\n", err); -} - -void mprotect_kernel_vm(int w) -{ - struct mm_struct *mm; - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - unsigned long addr; - - mm = &init_mm; - for(addr = start_vm; addr < end_vm;){ - pgd = pgd_offset(mm, addr); - pud = pud_offset(pgd, addr); - pmd = pmd_offset(pud, addr); - if(pmd_present(*pmd)){ - pte = pte_offset_kernel(pmd, addr); - if(pte_present(*pte)) protect_vm_page(addr, w, 0); - addr += PAGE_SIZE; - } - else addr += PMD_SIZE; - } -} - void flush_tlb_kernel_vm_tt(void) { flush_tlb_kernel_range(start_vm, end_vm); diff --git a/arch/um/kernel/tt/uaccess.c b/arch/um/kernel/tt/uaccess.c index a72aa632972..1cb60726567 100644 --- a/arch/um/kernel/tt/uaccess.c +++ b/arch/um/kernel/tt/uaccess.c @@ -8,7 +8,7 @@ int copy_from_user_tt(void *to, const void __user *from, int n) { - if(!access_ok_tt(VERIFY_READ, from, n)) + if(!access_ok(VERIFY_READ, from, n)) return(n); return(__do_copy_from_user(to, from, n, ¤t->thread.fault_addr, @@ -17,7 +17,7 @@ int copy_from_user_tt(void *to, const void __user *from, int n) int copy_to_user_tt(void __user *to, const void *from, int n) { - if(!access_ok_tt(VERIFY_WRITE, to, n)) + if(!access_ok(VERIFY_WRITE, to, n)) return(n); return(__do_copy_to_user(to, from, n, ¤t->thread.fault_addr, @@ -28,7 +28,7 @@ int strncpy_from_user_tt(char *dst, const char __user *src, int count) { int n; - if(!access_ok_tt(VERIFY_READ, src, 1)) + if(!access_ok(VERIFY_READ, src, 1)) return(-EFAULT); n = __do_strncpy_from_user(dst, src, count, @@ -47,7 +47,7 @@ int __clear_user_tt(void __user *mem, int len) int clear_user_tt(void __user *mem, int len) { - if(!access_ok_tt(VERIFY_WRITE, mem, len)) + if(!access_ok(VERIFY_WRITE, mem, len)) return(len); return(__do_clear_user(mem, len, ¤t->thread.fault_addr, diff --git a/arch/um/kernel/tt/uaccess_user.c b/arch/um/kernel/tt/uaccess_user.c index f01475512ec..6c92bbccb49 100644 --- a/arch/um/kernel/tt/uaccess_user.c +++ b/arch/um/kernel/tt/uaccess_user.c @@ -10,6 +10,7 @@ #include "uml_uaccess.h" #include "task.h" #include "kern_util.h" +#include "os.h" int __do_copy_from_user(void *to, const void *from, int n, void **fault_addr, void **fault_catcher) @@ -22,8 +23,15 @@ int __do_copy_from_user(void *to, const void *from, int n, __do_copy, &faulted); TASK_REGS(get_current())->tt = save; - if(!faulted) return(0); - else return(n - (fault - (unsigned long) from)); + if(!faulted) + return 0; + else if (fault) + return n - (fault - (unsigned long) from); + else + /* In case of a general protection fault, we don't have the + * fault address, so NULL is used instead. Pretend we didn't + * copy anything. */ + return n; } static void __do_strncpy(void *dst, const void *src, int count) diff --git a/arch/um/kernel/uaccess.c b/arch/um/kernel/uaccess.c new file mode 100644 index 00000000000..054e3de0784 --- /dev/null +++ b/arch/um/kernel/uaccess.c @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) + * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +/* These are here rather than tt/uaccess.c because skas mode needs them in + * order to do SIGBUS recovery when a tmpfs mount runs out of room. + */ + +#include <linux/string.h> +#include "os.h" + +void __do_copy(void *to, const void *from, int n) +{ + memcpy(to, from, n); +} + + +int __do_copy_to_user(void *to, const void *from, int n, + void **fault_addr, void **fault_catcher) +{ + unsigned long fault; + int faulted; + + fault = __do_user_copy(to, from, n, fault_addr, fault_catcher, + __do_copy, &faulted); + if(!faulted) return(0); + else return(n - (fault - (unsigned long) to)); +} diff --git a/arch/um/kernel/uaccess_user.c b/arch/um/kernel/uaccess_user.c deleted file mode 100644 index d035257ed0a..00000000000 --- a/arch/um/kernel/uaccess_user.c +++ /dev/null @@ -1,64 +0,0 @@ -/* - * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) - * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <setjmp.h> -#include <string.h> - -/* These are here rather than tt/uaccess.c because skas mode needs them in - * order to do SIGBUS recovery when a tmpfs mount runs out of room. - */ - -unsigned long __do_user_copy(void *to, const void *from, int n, - void **fault_addr, void **fault_catcher, - void (*op)(void *to, const void *from, - int n), int *faulted_out) -{ - unsigned long *faddrp = (unsigned long *) fault_addr, ret; - - sigjmp_buf jbuf; - *fault_catcher = &jbuf; - if(sigsetjmp(jbuf, 1) == 0){ - (*op)(to, from, n); - ret = 0; - *faulted_out = 0; - } - else { - ret = *faddrp; - *faulted_out = 1; - } - *fault_addr = NULL; - *fault_catcher = NULL; - return ret; -} - -void __do_copy(void *to, const void *from, int n) -{ - memcpy(to, from, n); -} - - -int __do_copy_to_user(void *to, const void *from, int n, - void **fault_addr, void **fault_catcher) -{ - unsigned long fault; - int faulted; - - fault = __do_user_copy(to, from, n, fault_addr, fault_catcher, - __do_copy, &faulted); - if(!faulted) return(0); - else return(n - (fault - (unsigned long) to)); -} - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index f0a275947d3..142a9493912 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -137,7 +137,7 @@ static char *argv1_end = NULL; /* Set in early boot */ static int have_root __initdata = 0; -long physmem_size = 32 * 1024 * 1024; +long long physmem_size = 32 * 1024 * 1024; void set_cmdline(char *cmd) { @@ -334,6 +334,8 @@ int linux_main(int argc, char **argv) add_arg(DEFAULT_COMMAND_LINE); os_early_checks(); + if (force_tt) + clear_can_do_skas(); mode_tt = force_tt ? 1 : !can_do_skas(); #ifndef CONFIG_MODE_TT if (mode_tt) { @@ -400,7 +402,7 @@ int linux_main(int argc, char **argv) #ifndef CONFIG_HIGHMEM highmem = 0; printf("CONFIG_HIGHMEM not enabled - physical memory shrunk " - "to %ld bytes\n", physmem_size); + "to %lu bytes\n", physmem_size); #endif } @@ -412,8 +414,8 @@ int linux_main(int argc, char **argv) setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem); if(init_maps(physmem_size, iomem_size, highmem)){ - printf("Failed to allocate mem_map for %ld bytes of physical " - "memory and %ld bytes of highmem\n", physmem_size, + printf("Failed to allocate mem_map for %lu bytes of physical " + "memory and %lu bytes of highmem\n", physmem_size, highmem); exit(1); } @@ -424,7 +426,7 @@ int linux_main(int argc, char **argv) end_vm = start_vm + virtmem_size; if(virtmem_size < physmem_size) - printf("Kernel virtual memory size shrunk to %ld bytes\n", + printf("Kernel virtual memory size shrunk to %lu bytes\n", virtmem_size); uml_postsetup(); diff --git a/arch/um/kernel/umid.c b/arch/um/kernel/umid.c index 186c2888501..0b21d59ba0c 100644 --- a/arch/um/kernel/umid.c +++ b/arch/um/kernel/umid.c @@ -31,6 +31,8 @@ static char *uml_dir = UML_DIR; /* Changed by set_umid */ static int umid_is_random = 1; static int umid_inited = 0; +/* Have we created the files? Should we remove them? */ +static int umid_owned = 0; static int make_umid(int (*printer)(const char *fmt, ...)); @@ -82,20 +84,21 @@ int __init umid_file_name(char *name, char *buf, int len) extern int tracing_pid; -static int __init create_pid_file(void) +static void __init create_pid_file(void) { char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")]; char pid[sizeof("nnnnn\0")]; int fd, n; - if(umid_file_name("pid", file, sizeof(file))) return 0; + if(umid_file_name("pid", file, sizeof(file))) + return; fd = os_open_file(file, of_create(of_excl(of_rdwr(OPENFLAGS()))), 0644); if(fd < 0){ printf("Open of machine pid file \"%s\" failed: %s\n", file, strerror(-fd)); - return 0; + return; } sprintf(pid, "%d\n", os_getpid()); @@ -103,7 +106,6 @@ static int __init create_pid_file(void) if(n != strlen(pid)) printf("Write of pid file failed - err = %d\n", -n); os_close_file(fd); - return 0; } static int actually_do_remove(char *dir) @@ -147,7 +149,8 @@ static int actually_do_remove(char *dir) void remove_umid_dir(void) { char dir[strlen(uml_dir) + UMID_LEN + 1]; - if(!umid_inited) return; + if (!umid_owned) + return; sprintf(dir, "%s%s", uml_dir, umid); actually_do_remove(dir); @@ -155,11 +158,12 @@ void remove_umid_dir(void) char *get_umid(int only_if_set) { - if(only_if_set && umid_is_random) return(NULL); - return(umid); + if(only_if_set && umid_is_random) + return NULL; + return umid; } -int not_dead_yet(char *dir) +static int not_dead_yet(char *dir) { char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")]; char pid[sizeof("nnnnn\0")], *end; @@ -193,7 +197,8 @@ int not_dead_yet(char *dir) (p == CHOOSE_MODE(tracing_pid, os_getpid()))) dead = 1; } - if(!dead) return(1); + if(!dead) + return(1); return(actually_do_remove(dir)); } @@ -232,16 +237,13 @@ static int __init make_uml_dir(void) strlcpy(dir, home, sizeof(dir)); uml_dir++; } + strlcat(dir, uml_dir, sizeof(dir)); len = strlen(dir); - strncat(dir, uml_dir, sizeof(dir) - len); - len = strlen(dir); - if((len > 0) && (len < sizeof(dir) - 1) && (dir[len - 1] != '/')){ - dir[len] = '/'; - dir[len + 1] = '\0'; - } + if (len > 0 && dir[len - 1] != '/') + strlcat(dir, "/", sizeof(dir)); uml_dir = malloc(strlen(dir) + 1); - if(uml_dir == NULL){ + if (uml_dir == NULL) { printf("make_uml_dir : malloc failed, errno = %d\n", errno); exit(1); } @@ -286,6 +288,7 @@ static int __init make_umid(int (*printer)(const char *fmt, ...)) if(errno == EEXIST){ if(not_dead_yet(tmp)){ (*printer)("umid '%s' is in use\n", umid); + umid_owned = 0; return(-1); } err = mkdir(tmp, 0777); @@ -296,7 +299,8 @@ static int __init make_umid(int (*printer)(const char *fmt, ...)) return(-1); } - return(0); + umid_owned = 1; + return 0; } __uml_setup("uml_dir=", set_uml_dir, @@ -309,7 +313,8 @@ static int __init make_umid_setup(void) /* one function with the ordering we need ... */ make_uml_dir(); make_umid(printf); - return create_pid_file(); + create_pid_file(); + return 0; } __uml_postsetup(make_umid_setup); diff --git a/arch/um/kernel/user_util.c b/arch/um/kernel/user_util.c index 41d17c71511..4c231161f25 100644 --- a/arch/um/kernel/user_util.c +++ b/arch/um/kernel/user_util.c @@ -27,7 +27,6 @@ #include "user.h" #include "mem_user.h" #include "init.h" -#include "helper.h" #include "ptrace_user.h" #include "uml-config.h" diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index d15ec2af6a2..b83ac8e21c3 100644 --- a/arch/um/os-Linux/Makefile +++ b/arch/um/os-Linux/Makefile @@ -3,11 +3,12 @@ # Licensed under the GPL # -obj-y = aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o time.o \ - tt.o tty.o user_syms.o drivers/ sys-$(SUBARCH)/ +obj-y = aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \ + start_up.o time.o tt.o tty.o uaccess.o user_syms.o drivers/ \ + sys-$(SUBARCH)/ -USER_OBJS := aio.o elf_aux.o file.o mem.o process.o signal.o start_up.o \ - time.o tt.o tty.o +USER_OBJS := aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \ + start_up.o time.o tt.o tty.o uaccess.o elf_aux.o: $(ARCH_DIR)/kernel-offsets.h CFLAGS_elf_aux.o += -I$(objtree)/arch/um diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c index f6e64026f99..ffa759addd3 100644 --- a/arch/um/os-Linux/aio.c +++ b/arch/um/os-Linux/aio.c @@ -6,42 +6,27 @@ #include <stdlib.h> #include <unistd.h> #include <signal.h> -#include <string.h> #include <errno.h> #include <sched.h> #include <sys/syscall.h> #include "os.h" -#include "helper.h" #include "aio.h" #include "init.h" #include "user.h" #include "mode.h" +struct aio_thread_req { + enum aio_type type; + int io_fd; + unsigned long long offset; + char *buf; + int len; + struct aio_context *aio; +}; + static int aio_req_fd_r = -1; static int aio_req_fd_w = -1; -static int update_aio(struct aio_context *aio, int res) -{ - if(res < 0) - aio->len = res; - else if((res == 0) && (aio->type == AIO_READ)){ - /* This is the EOF case - we have hit the end of the file - * and it ends in a partial block, so we fill the end of - * the block with zeros and claim success. - */ - memset(aio->data, 0, aio->len); - aio->len = 0; - } - else if(res > 0){ - aio->len -= res; - aio->data += res; - aio->offset += res; - return aio->len; - } - - return 0; -} - #if defined(HAVE_AIO_ABI) #include <linux/aio_abi.h> @@ -80,7 +65,8 @@ static long io_getevents(aio_context_t ctx_id, long min_nr, long nr, * that it now backs the mmapped area. */ -static int do_aio(aio_context_t ctx, struct aio_context *aio) +static int do_aio(aio_context_t ctx, enum aio_type type, int fd, char *buf, + int len, unsigned long long offset, struct aio_context *aio) { struct iocb iocb, *iocbp = &iocb; char c; @@ -88,39 +74,40 @@ static int do_aio(aio_context_t ctx, struct aio_context *aio) iocb = ((struct iocb) { .aio_data = (unsigned long) aio, .aio_reqprio = 0, - .aio_fildes = aio->fd, - .aio_buf = (unsigned long) aio->data, - .aio_nbytes = aio->len, - .aio_offset = aio->offset, + .aio_fildes = fd, + .aio_buf = (unsigned long) buf, + .aio_nbytes = len, + .aio_offset = offset, .aio_reserved1 = 0, .aio_reserved2 = 0, .aio_reserved3 = 0 }); - switch(aio->type){ + switch(type){ case AIO_READ: iocb.aio_lio_opcode = IOCB_CMD_PREAD; + err = io_submit(ctx, 1, &iocbp); break; case AIO_WRITE: iocb.aio_lio_opcode = IOCB_CMD_PWRITE; + err = io_submit(ctx, 1, &iocbp); break; case AIO_MMAP: iocb.aio_lio_opcode = IOCB_CMD_PREAD; iocb.aio_buf = (unsigned long) &c; iocb.aio_nbytes = sizeof(c); + err = io_submit(ctx, 1, &iocbp); break; default: - printk("Bogus op in do_aio - %d\n", aio->type); + printk("Bogus op in do_aio - %d\n", type); err = -EINVAL; - goto out; + break; } - err = io_submit(ctx, 1, &iocbp); if(err > 0) err = 0; else err = -errno; - out: return err; } @@ -129,9 +116,8 @@ static aio_context_t ctx = 0; static int aio_thread(void *arg) { struct aio_thread_reply reply; - struct aio_context *aio; struct io_event event; - int err, n; + int err, n, reply_fd; signal(SIGWINCH, SIG_IGN); @@ -144,22 +130,14 @@ static int aio_thread(void *arg) "errno = %d\n", errno); } else { - /* This is safe as we've just a pointer here. */ - aio = (struct aio_context *) (long) event.data; - if(update_aio(aio, event.res)){ - do_aio(ctx, aio); - continue; - } - reply = ((struct aio_thread_reply) - { .data = aio, - .err = aio->len }); - err = os_write_file(aio->reply_fd, &reply, - sizeof(reply)); + { .data = (void *) (long) event.data, + .err = event.res }); + reply_fd = ((struct aio_context *) reply.data)->reply_fd; + err = os_write_file(reply_fd, &reply, sizeof(reply)); if(err != sizeof(reply)) - printk("aio_thread - write failed, " - "fd = %d, err = %d\n", aio->reply_fd, - -err); + printk("aio_thread - write failed, fd = %d, " + "err = %d\n", aio_req_fd_r, -err); } } return 0; @@ -167,35 +145,35 @@ static int aio_thread(void *arg) #endif -static int do_not_aio(struct aio_context *aio) +static int do_not_aio(struct aio_thread_req *req) { char c; int err; - switch(aio->type){ + switch(req->type){ case AIO_READ: - err = os_seek_file(aio->fd, aio->offset); + err = os_seek_file(req->io_fd, req->offset); if(err) goto out; - err = os_read_file(aio->fd, aio->data, aio->len); + err = os_read_file(req->io_fd, req->buf, req->len); break; case AIO_WRITE: - err = os_seek_file(aio->fd, aio->offset); + err = os_seek_file(req->io_fd, req->offset); if(err) goto out; - err = os_write_file(aio->fd, aio->data, aio->len); + err = os_write_file(req->io_fd, req->buf, req->len); break; case AIO_MMAP: - err = os_seek_file(aio->fd, aio->offset); + err = os_seek_file(req->io_fd, req->offset); if(err) goto out; - err = os_read_file(aio->fd, &c, sizeof(c)); + err = os_read_file(req->io_fd, &c, sizeof(c)); break; default: - printk("do_not_aio - bad request type : %d\n", aio->type); + printk("do_not_aio - bad request type : %d\n", req->type); err = -EINVAL; break; } @@ -206,14 +184,14 @@ static int do_not_aio(struct aio_context *aio) static int not_aio_thread(void *arg) { - struct aio_context *aio; + struct aio_thread_req req; struct aio_thread_reply reply; int err; signal(SIGWINCH, SIG_IGN); while(1){ - err = os_read_file(aio_req_fd_r, &aio, sizeof(aio)); - if(err != sizeof(aio)){ + err = os_read_file(aio_req_fd_r, &req, sizeof(req)); + if(err != sizeof(req)){ if(err < 0) printk("not_aio_thread - read failed, " "fd = %d, err = %d\n", aio_req_fd_r, @@ -224,34 +202,17 @@ static int not_aio_thread(void *arg) } continue; } - again: - err = do_not_aio(aio); - - if(update_aio(aio, err)) - goto again; - - reply = ((struct aio_thread_reply) { .data = aio, - .err = aio->len }); - err = os_write_file(aio->reply_fd, &reply, sizeof(reply)); + err = do_not_aio(&req); + reply = ((struct aio_thread_reply) { .data = req.aio, + .err = err }); + err = os_write_file(req.aio->reply_fd, &reply, sizeof(reply)); if(err != sizeof(reply)) printk("not_aio_thread - write failed, fd = %d, " "err = %d\n", aio_req_fd_r, -err); } } -static int submit_aio_24(struct aio_context *aio) -{ - int err; - - err = os_write_file(aio_req_fd_w, &aio, sizeof(aio)); - if(err == sizeof(aio)) - err = 0; - - return err; -} - static int aio_pid = -1; -static int (*submit_proc)(struct aio_context *aio); static int init_aio_24(void) { @@ -283,33 +244,11 @@ static int init_aio_24(void) #endif printk("2.6 host AIO support not used - falling back to I/O " "thread\n"); - - submit_proc = submit_aio_24; - return 0; } #ifdef HAVE_AIO_ABI #define DEFAULT_24_AIO 0 -static int submit_aio_26(struct aio_context *aio) -{ - struct aio_thread_reply reply; - int err; - - err = do_aio(ctx, aio); - if(err){ - reply = ((struct aio_thread_reply) { .data = aio, - .err = err }); - err = os_write_file(aio->reply_fd, &reply, sizeof(reply)); - if(err != sizeof(reply)) - printk("submit_aio_26 - write failed, " - "fd = %d, err = %d\n", aio->reply_fd, -err); - else err = 0; - } - - return err; -} - static int init_aio_26(void) { unsigned long stack; @@ -330,22 +269,39 @@ static int init_aio_26(void) aio_pid = err; printk("Using 2.6 host AIO\n"); + return 0; +} + +static int submit_aio_26(enum aio_type type, int io_fd, char *buf, int len, + unsigned long long offset, struct aio_context *aio) +{ + struct aio_thread_reply reply; + int err; - submit_proc = submit_aio_26; + err = do_aio(ctx, type, io_fd, buf, len, offset, aio); + if(err){ + reply = ((struct aio_thread_reply) { .data = aio, + .err = err }); + err = os_write_file(aio->reply_fd, &reply, sizeof(reply)); + if(err != sizeof(reply)) + printk("submit_aio_26 - write failed, " + "fd = %d, err = %d\n", aio->reply_fd, -err); + else err = 0; + } - return 0; + return err; } #else #define DEFAULT_24_AIO 1 -static int submit_aio_26(struct aio_context *aio) +static int init_aio_26(void) { return -ENOSYS; } -static int init_aio_26(void) +static int submit_aio_26(enum aio_type type, int io_fd, char *buf, int len, + unsigned long long offset, struct aio_context *aio) { - submit_proc = submit_aio_26; return -ENOSYS; } #endif @@ -412,7 +368,33 @@ static void exit_aio(void) __uml_exitcall(exit_aio); -int submit_aio(struct aio_context *aio) +static int submit_aio_24(enum aio_type type, int io_fd, char *buf, int len, + unsigned long long offset, struct aio_context *aio) { - return (*submit_proc)(aio); + struct aio_thread_req req = { .type = type, + .io_fd = io_fd, + .offset = offset, + .buf = buf, + .len = len, + .aio = aio, + }; + int err; + + err = os_write_file(aio_req_fd_w, &req, sizeof(req)); + if(err == sizeof(req)) + err = 0; + + return err; +} + +int submit_aio(enum aio_type type, int io_fd, char *buf, int len, + unsigned long long offset, int reply_fd, + struct aio_context *aio) +{ + aio->reply_fd = reply_fd; + if(aio_24) + return submit_aio_24(type, io_fd, buf, len, offset, aio); + else { + return submit_aio_26(type, io_fd, buf, len, offset, aio); + } } diff --git a/arch/um/os-Linux/drivers/ethertap_user.c b/arch/um/os-Linux/drivers/ethertap_user.c index cd4d6544da7..901b85e8a1c 100644 --- a/arch/um/os-Linux/drivers/ethertap_user.c +++ b/arch/um/os-Linux/drivers/ethertap_user.c @@ -19,7 +19,6 @@ #include "user_util.h" #include "net_user.h" #include "etap.h" -#include "helper.h" #include "os.h" #define MAX_PACKET ETH_MAX_PACKET diff --git a/arch/um/os-Linux/drivers/tuntap_user.c b/arch/um/os-Linux/drivers/tuntap_user.c index 4ba9b17adf1..52945338b64 100644 --- a/arch/um/os-Linux/drivers/tuntap_user.c +++ b/arch/um/os-Linux/drivers/tuntap_user.c @@ -20,7 +20,6 @@ #include "kern_util.h" #include "user_util.h" #include "user.h" -#include "helper.h" #include "os.h" #define MAX_PACKET ETH_MAX_PACKET diff --git a/arch/um/os-Linux/elf_aux.c b/arch/um/os-Linux/elf_aux.c index ab33cb3c74e..5a99dd3fbed 100644 --- a/arch/um/os-Linux/elf_aux.c +++ b/arch/um/os-Linux/elf_aux.c @@ -12,7 +12,7 @@ #include "init.h" #include "elf_user.h" #include "mem_user.h" -#include <kernel-offsets.h> +#include <kern_constants.h> /* Use the one from the kernel - the host may miss it, if having old headers. */ #if UM_ELF_CLASS == UM_ELFCLASS32 diff --git a/arch/um/kernel/helper.c b/arch/um/os-Linux/helper.c index 33fb0bd3b11..36cc8475bcd 100644 --- a/arch/um/kernel/helper.c +++ b/arch/um/os-Linux/helper.c @@ -1,4 +1,4 @@ -/* +/* * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ @@ -13,7 +13,6 @@ #include "user.h" #include "kern_util.h" #include "user_util.h" -#include "helper.h" #include "os.h" struct helper_data { @@ -46,7 +45,7 @@ static int helper_child(void *arg) errval = errno; printk("execvp of '%s' failed - errno = %d\n", argv[0], errno); os_write_file(data->fd, &errval, sizeof(errval)); - os_kill_process(os_getpid(), 0); + kill(os_getpid(), SIGKILL); return(0); } @@ -90,7 +89,7 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, goto out_close; } - os_close_file(fds[1]); + close(fds[1]); fds[1] = -1; /*Read the errno value from the child.*/ @@ -98,7 +97,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, if(n < 0){ printk("run_helper : read on pipe failed, ret = %d\n", -n); ret = n; - os_kill_process(pid, 1); + kill(pid, SIGKILL); + CATCH_EINTR(waitpid(pid, NULL, 0)); } else if(n != 0){ CATCH_EINTR(n = waitpid(pid, NULL, 0)); @@ -109,8 +109,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, out_close: if (fds[1] != -1) - os_close_file(fds[1]); - os_close_file(fds[0]); + close(fds[1]); + close(fds[0]); out_free: if(stack_out == NULL) free_stack(stack, 0); @@ -118,7 +118,7 @@ out_free: return(ret); } -int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, +int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, unsigned long *stack_out, int stack_order) { unsigned long stack, sp; @@ -131,7 +131,7 @@ int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, pid = clone(proc, (void *) sp, flags | SIGCHLD, arg); if(pid < 0){ err = -errno; - printk("run_helper_thread : clone failed, errno = %d\n", + printk("run_helper_thread : clone failed, errno = %d\n", errno); return err; } diff --git a/arch/um/kernel/main.c b/arch/um/os-Linux/main.c index d31027f0fe3..23da27d2256 100644 --- a/arch/um/kernel/main.c +++ b/arch/um/os-Linux/main.c @@ -157,25 +157,25 @@ int main(int argc, char **argv, char **envp) */ change_sig(SIGPROF, 0); - /* This signal stuff used to be in the reboot case. However, - * sometimes a SIGVTALRM can come in when we're halting (reproducably - * when writing out gcov information, presumably because that takes - * some time) and cause a segfault. - */ - - /* stop timers and set SIG*ALRM to be ignored */ - disable_timer(); - - /* disable SIGIO for the fds and set SIGIO to be ignored */ - err = deactivate_all_fds(); - if(err) - printf("deactivate_all_fds failed, errno = %d\n", -err); - - /* Let any pending signals fire now. This ensures - * that they won't be delivered after the exec, when - * they are definitely not expected. - */ - unblock_signals(); + /* This signal stuff used to be in the reboot case. However, + * sometimes a SIGVTALRM can come in when we're halting (reproducably + * when writing out gcov information, presumably because that takes + * some time) and cause a segfault. + */ + + /* stop timers and set SIG*ALRM to be ignored */ + disable_timer(); + + /* disable SIGIO for the fds and set SIGIO to be ignored */ + err = deactivate_all_fds(); + if(err) + printf("deactivate_all_fds failed, errno = %d\n", -err); + + /* Let any pending signals fire now. This ensures + * that they won't be delivered after the exec, when + * they are definitely not expected. + */ + unblock_signals(); /* Reboot */ if(ret){ @@ -257,14 +257,3 @@ void __wrap_free(void *ptr) } else __real_free(ptr); } - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c index 8e71edaaf80..9d7d69a523b 100644 --- a/arch/um/os-Linux/mem.c +++ b/arch/um/os-Linux/mem.c @@ -88,7 +88,7 @@ int make_tempfile(const char *template, char **out_tempname, int do_unlink) * This proc is used in start_up.c * So it isn't 'static'. */ -int create_tmp_file(unsigned long len) +int create_tmp_file(unsigned long long len) { int fd, err; char zero; @@ -121,7 +121,7 @@ int create_tmp_file(unsigned long len) return(fd); } -static int create_anon_file(unsigned long len) +static int create_anon_file(unsigned long long len) { void *addr; int fd; @@ -144,7 +144,7 @@ static int create_anon_file(unsigned long len) extern int have_devanon; -int create_mem_file(unsigned long len) +int create_mem_file(unsigned long long len) { int err, fd; diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c index 6af83171ca4..37517d49c4a 100644 --- a/arch/um/os-Linux/start_up.c +++ b/arch/um/os-Linux/start_up.c @@ -135,7 +135,9 @@ static int stop_ptraced_child(int pid, void *stack, int exitcode, } int ptrace_faultinfo = 1; +int ptrace_ldt = 1; int proc_mm = 1; +int skas_needs_stub = 0; static int __init skas0_cmd_param(char *str, int* add) { @@ -143,11 +145,22 @@ static int __init skas0_cmd_param(char *str, int* add) return 0; } +/* The two __uml_setup would conflict, without this stupid alias. */ + +static int __init mode_skas0_cmd_param(char *str, int* add) + __attribute__((alias("skas0_cmd_param"))); + __uml_setup("skas0", skas0_cmd_param, "skas0\n" " Disables SKAS3 usage, so that SKAS0 is used, unless \n" " you specify mode=tt.\n\n"); +__uml_setup("mode=skas0", mode_skas0_cmd_param, + "mode=skas0\n" + " Disables SKAS3 usage, so that SKAS0 is used, unless you \n" + " specify mode=tt. Note that this was recently added - on \n" + " older kernels you must use simply \"skas0\".\n\n"); + static int force_sysemu_disabled = 0; static int __init nosysemu_cmd_param(char *str, int* add) @@ -283,7 +296,7 @@ static void __init check_ptrace(void) check_sysemu(); } -extern int create_tmp_file(unsigned long len); +extern int create_tmp_file(unsigned long long len); static void check_tmpexec(void) { @@ -341,14 +354,26 @@ __uml_setup("noptracefaultinfo", noptracefaultinfo_cmd_param, " it. To support PTRACE_FAULTINFO, the host needs to be patched\n" " using the current skas3 patch.\n\n"); +static int __init noptraceldt_cmd_param(char *str, int* add) +{ + ptrace_ldt = 0; + return 0; +} + +__uml_setup("noptraceldt", noptraceldt_cmd_param, +"noptraceldt\n" +" Turns off usage of PTRACE_LDT, even if host supports it.\n" +" To support PTRACE_LDT, the host needs to be patched using\n" +" the current skas3 patch.\n\n"); + #ifdef UML_CONFIG_MODE_SKAS -static inline void check_skas3_ptrace_support(void) +static inline void check_skas3_ptrace_faultinfo(void) { struct ptrace_faultinfo fi; void *stack; int pid, n; - printf("Checking for the skas3 patch in the host..."); + printf(" - PTRACE_FAULTINFO..."); pid = start_ptraced_child(&stack); n = ptrace(PTRACE_FAULTINFO, pid, 0, &fi); @@ -370,9 +395,49 @@ static inline void check_skas3_ptrace_support(void) stop_ptraced_child(pid, stack, 1, 1); } -int can_do_skas(void) +static inline void check_skas3_ptrace_ldt(void) { - printf("Checking for /proc/mm..."); +#ifdef PTRACE_LDT + void *stack; + int pid, n; + unsigned char ldtbuf[40]; + struct ptrace_ldt ldt_op = (struct ptrace_ldt) { + .func = 2, /* read default ldt */ + .ptr = ldtbuf, + .bytecount = sizeof(ldtbuf)}; + + printf(" - PTRACE_LDT..."); + pid = start_ptraced_child(&stack); + + n = ptrace(PTRACE_LDT, pid, 0, (unsigned long) &ldt_op); + if (n < 0) { + if(errno == EIO) + printf("not found\n"); + else { + perror("not found"); + } + ptrace_ldt = 0; + } + else { + if(ptrace_ldt) + printf("found\n"); + else + printf("found, but use is disabled\n"); + } + + stop_ptraced_child(pid, stack, 1, 1); +#else + /* PTRACE_LDT might be disabled via cmdline option. + * We want to override this, else we might use the stub + * without real need + */ + ptrace_ldt = 1; +#endif +} + +static inline void check_skas3_proc_mm(void) +{ + printf(" - /proc/mm..."); if (os_access("/proc/mm", OS_ACC_W_OK) < 0) { proc_mm = 0; printf("not found\n"); @@ -383,8 +448,19 @@ int can_do_skas(void) else printf("found\n"); } +} + +int can_do_skas(void) +{ + printf("Checking for the skas3 patch in the host:\n"); + + check_skas3_proc_mm(); + check_skas3_ptrace_faultinfo(); + check_skas3_ptrace_ldt(); + + if(!proc_mm || !ptrace_faultinfo || !ptrace_ldt) + skas_needs_stub = 1; - check_skas3_ptrace_support(); return 1; } #else diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c index 3125d320722..aee4812333c 100644 --- a/arch/um/os-Linux/sys-i386/registers.c +++ b/arch/um/os-Linux/sys-i386/registers.c @@ -5,6 +5,7 @@ #include <errno.h> #include <string.h> +#include <setjmp.h> #include "sysdep/ptrace_user.h" #include "sysdep/ptrace.h" #include "uml-config.h" @@ -126,13 +127,11 @@ void get_safe_registers(unsigned long *regs) memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long)); } -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ +void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer) +{ + struct __jmp_buf_tag *jmpbuf = buffer; + + UPT_SET(uml_regs, EIP, jmpbuf->__jmpbuf[JB_PC]); + UPT_SET(uml_regs, UESP, jmpbuf->__jmpbuf[JB_SP]); + UPT_SET(uml_regs, EBP, jmpbuf->__jmpbuf[JB_BP]); +} diff --git a/arch/um/os-Linux/sys-x86_64/registers.c b/arch/um/os-Linux/sys-x86_64/registers.c index 44438d15c3d..4b638dfb52b 100644 --- a/arch/um/os-Linux/sys-x86_64/registers.c +++ b/arch/um/os-Linux/sys-x86_64/registers.c @@ -5,6 +5,7 @@ #include <errno.h> #include <string.h> +#include <setjmp.h> #include "ptrace_user.h" #include "uml-config.h" #include "skas_ptregs.h" @@ -74,13 +75,11 @@ void get_safe_registers(unsigned long *regs) memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long)); } -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ +void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer) +{ + struct __jmp_buf_tag *jmpbuf = buffer; + + UPT_SET(uml_regs, RIP, jmpbuf->__jmpbuf[JB_PC]); + UPT_SET(uml_regs, RSP, jmpbuf->__jmpbuf[JB_RSP]); + UPT_SET(uml_regs, RBP, jmpbuf->__jmpbuf[JB_RBP]); +} diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c new file mode 100644 index 00000000000..38d710158c3 --- /dev/null +++ b/arch/um/os-Linux/uaccess.c @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) + * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <setjmp.h> +#include <string.h> + +unsigned long __do_user_copy(void *to, const void *from, int n, + void **fault_addr, void **fault_catcher, + void (*op)(void *to, const void *from, + int n), int *faulted_out) +{ + unsigned long *faddrp = (unsigned long *) fault_addr, ret; + + sigjmp_buf jbuf; + *fault_catcher = &jbuf; + if(sigsetjmp(jbuf, 1) == 0){ + (*op)(to, from, n); + ret = 0; + *faulted_out = 0; + } + else { + ret = *faddrp; + *faulted_out = 1; + } + *fault_addr = NULL; + *fault_catcher = NULL; + return ret; +} + diff --git a/arch/um/os-Linux/util/Makefile b/arch/um/os-Linux/util/Makefile deleted file mode 100644 index 9778aed0c31..00000000000 --- a/arch/um/os-Linux/util/Makefile +++ /dev/null @@ -1,4 +0,0 @@ -hostprogs-y := mk_user_constants -always := $(hostprogs-y) - -HOSTCFLAGS_mk_user_constants.o := -I$(objtree)/arch/um diff --git a/arch/um/os-Linux/util/mk_user_constants.c b/arch/um/os-Linux/util/mk_user_constants.c deleted file mode 100644 index 4838f30eecf..00000000000 --- a/arch/um/os-Linux/util/mk_user_constants.c +++ /dev/null @@ -1,23 +0,0 @@ -#include <stdio.h> -#include <user-offsets.h> - -int main(int argc, char **argv) -{ - printf("/*\n"); - printf(" * Generated by mk_user_constants\n"); - printf(" */\n"); - printf("\n"); - printf("#ifndef __UM_USER_CONSTANTS_H\n"); - printf("#define __UM_USER_CONSTANTS_H\n"); - printf("\n"); - /* I'd like to use FRAME_SIZE from ptrace.h here, but that's wrong on - * x86_64 (216 vs 168 bytes). user_regs_struct is the correct size on - * both x86_64 and i386. - */ - printf("#define UM_FRAME_SIZE %d\n", __UM_FRAME_SIZE); - - printf("\n"); - printf("#endif\n"); - - return(0); -} diff --git a/arch/um/scripts/Makefile.rules b/arch/um/scripts/Makefile.rules index 59a1291f477..b3fbf125709 100644 --- a/arch/um/scripts/Makefile.rules +++ b/arch/um/scripts/Makefile.rules @@ -7,8 +7,8 @@ USER_SINGLE_OBJS := \ USER_OBJS += $(filter %_user.o,$(obj-y) $(obj-m) $(USER_SINGLE_OBJS)) USER_OBJS := $(foreach file,$(USER_OBJS),$(obj)/$(file)) -$(USER_OBJS) : c_flags = -Wp,-MD,$(depfile) $(USER_CFLAGS) \ - $(CFLAGS_$(notdir $@)) +$(USER_OBJS) $(USER_OBJS:.o=.i) $(USER_OBJS:.o=.s) $(USER_OBJS:.o=.lst): \ + c_flags = -Wp,-MD,$(depfile) $(USER_CFLAGS) $(CFLAGS_$(notdir $@)) $(USER_OBJS): cmd_checksrc = $(USER_OBJS): quiet_cmd_checksrc = $(USER_OBJS): cmd_force_checksrc = @@ -26,8 +26,13 @@ define unprofile $(patsubst -pg,,$(patsubst -fprofile-arcs -ftest-coverage,,$(1))) endef +# cmd_make_link checks to see if the $(foo-dir) variable starts with a /. If +# so, it's considered to be a path relative to $(srcdir) rather than +# $(srcdir)/arch/$(SUBARCH). This is because x86_64 wants to get ldt.c from +# arch/um/sys-i386 rather than arch/i386 like the other borrowed files. So, +# it sets $(ldt.c-dir) to /arch/um/sys-i386. quiet_cmd_make_link = SYMLINK $@ -cmd_make_link = ln -sf $(srctree)/arch/$(SUBARCH)/$($(notdir $@)-dir)/$(notdir $@) $@ +cmd_make_link = rm -f $@; ln -sf $(srctree)$(if $(filter-out /%,$($(notdir $@)-dir)),/arch/$(SUBARCH))/$($(notdir $@)-dir)/$(notdir $@) $@ # this needs to be before the foreach, because targets does not accept # complete paths like $(obj)/$(f). To make sure this works, use a := assignment diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile index 4ca2a229da4..150059dbee1 100644 --- a/arch/um/sys-i386/Makefile +++ b/arch/um/sys-i386/Makefile @@ -5,7 +5,7 @@ obj-y = bitops.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \ obj-$(CONFIG_HIGHMEM) += highmem.o obj-$(CONFIG_MODULES) += module.o -USER_OBJS := bugs.o ptrace_user.o sigcontext.o fault.o +USER_OBJS := bugs.o ptrace_user.o sigcontext.o fault.o stub_segv.o SYMLINKS = bitops.c semaphore.c highmem.c module.c @@ -18,6 +18,4 @@ module.c-dir = kernel $(obj)/stub_segv.o : _c_flags = $(call unprofile,$(CFLAGS)) -subdir- := util - include arch/um/scripts/Makefile.unmap diff --git a/arch/um/sys-i386/kernel-offsets.c b/arch/um/sys-i386/kernel-offsets.c index a1070af2bcd..35db8505750 100644 --- a/arch/um/sys-i386/kernel-offsets.c +++ b/arch/um/sys-i386/kernel-offsets.c @@ -18,9 +18,9 @@ void foo(void) { - OFFSET(TASK_DEBUGREGS, task_struct, thread.arch.debugregs); + OFFSET(HOST_TASK_DEBUGREGS, task_struct, thread.arch.debugregs); #ifdef CONFIG_MODE_TT - OFFSET(TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid); + OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid); #endif #include <common-offsets.h> } diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c index 36b5c2c1328..17746b4c08f 100644 --- a/arch/um/sys-i386/ldt.c +++ b/arch/um/sys-i386/ldt.c @@ -3,53 +3,26 @@ * Licensed under the GPL */ +#include "linux/stddef.h" #include "linux/config.h" #include "linux/sched.h" #include "linux/slab.h" #include "linux/types.h" +#include "linux/errno.h" #include "asm/uaccess.h" -#include "asm/ptrace.h" #include "asm/smp.h" #include "asm/ldt.h" +#include "asm/unistd.h" #include "choose-mode.h" #include "kern.h" #include "mode_kern.h" -#ifdef CONFIG_MODE_TT - extern int modify_ldt(int func, void *ptr, unsigned long bytecount); -static int do_modify_ldt_tt(int func, void *ptr, unsigned long bytecount) -{ - return modify_ldt(func, ptr, bytecount); -} - -#endif - -#ifdef CONFIG_MODE_SKAS - -#include "skas.h" -#include "skas_ptrace.h" - -static int do_modify_ldt_skas(int func, void *ptr, unsigned long bytecount) -{ - struct ptrace_ldt ldt; - u32 cpu; - int res; - - ldt = ((struct ptrace_ldt) { .func = func, - .ptr = ptr, - .bytecount = bytecount }); - - cpu = get_cpu(); - res = ptrace(PTRACE_LDT, userspace_pid[cpu], 0, (unsigned long) &ldt); - put_cpu(); - - return res; -} -#endif +#ifdef CONFIG_MODE_TT -int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount) +static long do_modify_ldt_tt(int func, void __user *ptr, + unsigned long bytecount) { struct user_desc info; int res = 0; @@ -89,8 +62,7 @@ int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount) goto out; } - res = CHOOSE_MODE_PROC(do_modify_ldt_tt, do_modify_ldt_skas, func, - p, bytecount); + res = modify_ldt(func, p, bytecount); if(res < 0) goto out; @@ -108,3 +80,470 @@ out: kfree(buf); return res; } + +#endif + +#ifdef CONFIG_MODE_SKAS + +#include "skas.h" +#include "skas_ptrace.h" +#include "asm/mmu_context.h" + +long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc, + void **addr, int done) +{ + long res; + + if(proc_mm){ + /* This is a special handling for the case, that the mm to + * modify isn't current->active_mm. + * If this is called directly by modify_ldt, + * (current->active_mm->context.skas.u == mm_idp) + * will be true. So no call to switch_mm_skas(mm_idp) is done. + * If this is called in case of init_new_ldt or PTRACE_LDT, + * mm_idp won't belong to current->active_mm, but child->mm. + * So we need to switch child's mm into our userspace, then + * later switch back. + * + * Note: I'm unshure: should interrupts be disabled here? + */ + if(!current->active_mm || current->active_mm == &init_mm || + mm_idp != ¤t->active_mm->context.skas.id) + switch_mm_skas(mm_idp); + } + + if(ptrace_ldt) { + struct ptrace_ldt ldt_op = (struct ptrace_ldt) { + .func = func, + .ptr = desc, + .bytecount = sizeof(*desc)}; + u32 cpu; + int pid; + + if(!proc_mm) + pid = mm_idp->u.pid; + else { + cpu = get_cpu(); + pid = userspace_pid[cpu]; + } + + res = ptrace(PTRACE_LDT, pid, 0, (unsigned long) &ldt_op); + if(res) + res = errno; + + if(proc_mm) + put_cpu(); + } + else { + void *stub_addr; + res = syscall_stub_data(mm_idp, (unsigned long *)desc, + (sizeof(*desc) + sizeof(long) - 1) & + ~(sizeof(long) - 1), + addr, &stub_addr); + if(!res){ + unsigned long args[] = { func, + (unsigned long)stub_addr, + sizeof(*desc), + 0, 0, 0 }; + res = run_syscall_stub(mm_idp, __NR_modify_ldt, args, + 0, addr, done); + } + } + + if(proc_mm){ + /* This is the second part of special handling, that makes + * PTRACE_LDT possible to implement. + */ + if(current->active_mm && current->active_mm != &init_mm && + mm_idp != ¤t->active_mm->context.skas.id) + switch_mm_skas(¤t->active_mm->context.skas.id); + } + + return res; +} + +static long read_ldt_from_host(void __user * ptr, unsigned long bytecount) +{ + int res, n; + struct ptrace_ldt ptrace_ldt = (struct ptrace_ldt) { + .func = 0, + .bytecount = bytecount, + .ptr = (void *)kmalloc(bytecount, GFP_KERNEL)}; + u32 cpu; + + if(ptrace_ldt.ptr == NULL) + return -ENOMEM; + + /* This is called from sys_modify_ldt only, so userspace_pid gives + * us the right number + */ + + cpu = get_cpu(); + res = ptrace(PTRACE_LDT, userspace_pid[cpu], 0, + (unsigned long) &ptrace_ldt); + put_cpu(); + if(res < 0) + goto out; + + n = copy_to_user(ptr, ptrace_ldt.ptr, res); + if(n != 0) + res = -EFAULT; + + out: + kfree(ptrace_ldt.ptr); + + return res; +} + +/* + * In skas mode, we hold our own ldt data in UML. + * Thus, the code implementing sys_modify_ldt_skas + * is very similar to (and mostly stolen from) sys_modify_ldt + * for arch/i386/kernel/ldt.c + * The routines copied and modified in part are: + * - read_ldt + * - read_default_ldt + * - write_ldt + * - sys_modify_ldt_skas + */ + +static int read_ldt(void __user * ptr, unsigned long bytecount) +{ + int i, err = 0; + unsigned long size; + uml_ldt_t * ldt = ¤t->mm->context.skas.ldt; + + if(!ldt->entry_count) + goto out; + if(bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES) + bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES; + err = bytecount; + + if(ptrace_ldt){ + return read_ldt_from_host(ptr, bytecount); + } + + down(&ldt->semaphore); + if(ldt->entry_count <= LDT_DIRECT_ENTRIES){ + size = LDT_ENTRY_SIZE*LDT_DIRECT_ENTRIES; + if(size > bytecount) + size = bytecount; + if(copy_to_user(ptr, ldt->u.entries, size)) + err = -EFAULT; + bytecount -= size; + ptr += size; + } + else { + for(i=0; i<ldt->entry_count/LDT_ENTRIES_PER_PAGE && bytecount; + i++){ + size = PAGE_SIZE; + if(size > bytecount) + size = bytecount; + if(copy_to_user(ptr, ldt->u.pages[i], size)){ + err = -EFAULT; + break; + } + bytecount -= size; + ptr += size; + } + } + up(&ldt->semaphore); + + if(bytecount == 0 || err == -EFAULT) + goto out; + + if(clear_user(ptr, bytecount)) + err = -EFAULT; + +out: + return err; +} + +static int read_default_ldt(void __user * ptr, unsigned long bytecount) +{ + int err; + + if(bytecount > 5*LDT_ENTRY_SIZE) + bytecount = 5*LDT_ENTRY_SIZE; + + err = bytecount; + /* UML doesn't support lcall7 and lcall27. + * So, we don't really have a default ldt, but emulate + * an empty ldt of common host default ldt size. + */ + if(clear_user(ptr, bytecount)) + err = -EFAULT; + + return err; +} + +static int write_ldt(void __user * ptr, unsigned long bytecount, int func) +{ + uml_ldt_t * ldt = ¤t->mm->context.skas.ldt; + struct mm_id * mm_idp = ¤t->mm->context.skas.id; + int i, err; + struct user_desc ldt_info; + struct ldt_entry entry0, *ldt_p; + void *addr = NULL; + + err = -EINVAL; + if(bytecount != sizeof(ldt_info)) + goto out; + err = -EFAULT; + if(copy_from_user(&ldt_info, ptr, sizeof(ldt_info))) + goto out; + + err = -EINVAL; + if(ldt_info.entry_number >= LDT_ENTRIES) + goto out; + if(ldt_info.contents == 3){ + if (func == 1) + goto out; + if (ldt_info.seg_not_present == 0) + goto out; + } + + if(!ptrace_ldt) + down(&ldt->semaphore); + + err = write_ldt_entry(mm_idp, func, &ldt_info, &addr, 1); + if(err) + goto out_unlock; + else if(ptrace_ldt) { + /* With PTRACE_LDT available, this is used as a flag only */ + ldt->entry_count = 1; + goto out; + } + + if(ldt_info.entry_number >= ldt->entry_count && + ldt_info.entry_number >= LDT_DIRECT_ENTRIES){ + for(i=ldt->entry_count/LDT_ENTRIES_PER_PAGE; + i*LDT_ENTRIES_PER_PAGE <= ldt_info.entry_number; + i++){ + if(i == 0) + memcpy(&entry0, ldt->u.entries, + sizeof(entry0)); + ldt->u.pages[i] = (struct ldt_entry *) + __get_free_page(GFP_KERNEL|__GFP_ZERO); + if(!ldt->u.pages[i]){ + err = -ENOMEM; + /* Undo the change in host */ + memset(&ldt_info, 0, sizeof(ldt_info)); + write_ldt_entry(mm_idp, 1, &ldt_info, &addr, 1); + goto out_unlock; + } + if(i == 0) { + memcpy(ldt->u.pages[0], &entry0, + sizeof(entry0)); + memcpy(ldt->u.pages[0]+1, ldt->u.entries+1, + sizeof(entry0)*(LDT_DIRECT_ENTRIES-1)); + } + ldt->entry_count = (i + 1) * LDT_ENTRIES_PER_PAGE; + } + } + if(ldt->entry_count <= ldt_info.entry_number) + ldt->entry_count = ldt_info.entry_number + 1; + + if(ldt->entry_count <= LDT_DIRECT_ENTRIES) + ldt_p = ldt->u.entries + ldt_info.entry_number; + else + ldt_p = ldt->u.pages[ldt_info.entry_number/LDT_ENTRIES_PER_PAGE] + + ldt_info.entry_number%LDT_ENTRIES_PER_PAGE; + + if(ldt_info.base_addr == 0 && ldt_info.limit == 0 && + (func == 1 || LDT_empty(&ldt_info))){ + ldt_p->a = 0; + ldt_p->b = 0; + } + else{ + if (func == 1) + ldt_info.useable = 0; + ldt_p->a = LDT_entry_a(&ldt_info); + ldt_p->b = LDT_entry_b(&ldt_info); + } + err = 0; + +out_unlock: + up(&ldt->semaphore); +out: + return err; +} + +static long do_modify_ldt_skas(int func, void __user *ptr, + unsigned long bytecount) +{ + int ret = -ENOSYS; + + switch (func) { + case 0: + ret = read_ldt(ptr, bytecount); + break; + case 1: + case 0x11: + ret = write_ldt(ptr, bytecount, func); + break; + case 2: + ret = read_default_ldt(ptr, bytecount); + break; + } + return ret; +} + +short dummy_list[9] = {0, -1}; +short * host_ldt_entries = NULL; + +void ldt_get_host_info(void) +{ + long ret; + struct ldt_entry * ldt; + int i, size, k, order; + + host_ldt_entries = dummy_list+1; + + for(i = LDT_PAGES_MAX-1, order=0; i; i>>=1, order++); + + ldt = (struct ldt_entry *) + __get_free_pages(GFP_KERNEL|__GFP_ZERO, order); + if(ldt == NULL) { + printk("ldt_get_host_info: couldn't allocate buffer for host ldt\n"); + return; + } + + ret = modify_ldt(0, ldt, (1<<order)*PAGE_SIZE); + if(ret < 0) { + printk("ldt_get_host_info: couldn't read host ldt\n"); + goto out_free; + } + if(ret == 0) { + /* default_ldt is active, simply write an empty entry 0 */ + host_ldt_entries = dummy_list; + goto out_free; + } + + for(i=0, size=0; i<ret/LDT_ENTRY_SIZE; i++){ + if(ldt[i].a != 0 || ldt[i].b != 0) + size++; + } + + if(size < sizeof(dummy_list)/sizeof(dummy_list[0])) { + host_ldt_entries = dummy_list; + } + else { + size = (size + 1) * sizeof(dummy_list[0]); + host_ldt_entries = (short *)kmalloc(size, GFP_KERNEL); + if(host_ldt_entries == NULL) { + printk("ldt_get_host_info: couldn't allocate host ldt list\n"); + goto out_free; + } + } + + for(i=0, k=0; i<ret/LDT_ENTRY_SIZE; i++){ + if(ldt[i].a != 0 || ldt[i].b != 0) { + host_ldt_entries[k++] = i; + } + } + host_ldt_entries[k] = -1; + +out_free: + free_pages((unsigned long)ldt, order); +} + +long init_new_ldt(struct mmu_context_skas * new_mm, + struct mmu_context_skas * from_mm) +{ + struct user_desc desc; + short * num_p; + int i; + long page, err=0; + void *addr = NULL; + + memset(&desc, 0, sizeof(desc)); + + if(!ptrace_ldt) + init_MUTEX(&new_mm->ldt.semaphore); + + if(!from_mm){ + /* + * We have to initialize a clean ldt. + */ + if(proc_mm) { + /* + * If the new mm was created using proc_mm, host's + * default-ldt currently is assigned, which normally + * contains the call-gates for lcall7 and lcall27. + * To remove these gates, we simply write an empty + * entry as number 0 to the host. + */ + err = write_ldt_entry(&new_mm->id, 1, &desc, + &addr, 1); + } + else{ + /* + * Now we try to retrieve info about the ldt, we + * inherited from the host. All ldt-entries found + * will be reset in the following loop + */ + if(host_ldt_entries == NULL) + ldt_get_host_info(); + for(num_p=host_ldt_entries; *num_p != -1; num_p++){ + desc.entry_number = *num_p; + err = write_ldt_entry(&new_mm->id, 1, &desc, + &addr, *(num_p + 1) == -1); + if(err) + break; + } + } + new_mm->ldt.entry_count = 0; + } + else if (!ptrace_ldt) { + /* Our local LDT is used to supply the data for + * modify_ldt(READLDT), if PTRACE_LDT isn't available, + * i.e., we have to use the stub for modify_ldt, which + * can't handle the big read buffer of up to 64kB. + */ + down(&from_mm->ldt.semaphore); + if(from_mm->ldt.entry_count <= LDT_DIRECT_ENTRIES){ + memcpy(new_mm->ldt.u.entries, from_mm->ldt.u.entries, + sizeof(new_mm->ldt.u.entries)); + } + else{ + i = from_mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE; + while(i-->0){ + page = __get_free_page(GFP_KERNEL|__GFP_ZERO); + if (!page){ + err = -ENOMEM; + break; + } + new_mm->ldt.u.pages[i] = + (struct ldt_entry *) page; + memcpy(new_mm->ldt.u.pages[i], + from_mm->ldt.u.pages[i], PAGE_SIZE); + } + } + new_mm->ldt.entry_count = from_mm->ldt.entry_count; + up(&from_mm->ldt.semaphore); + } + + return err; +} + + +void free_ldt(struct mmu_context_skas * mm) +{ + int i; + + if(!ptrace_ldt && mm->ldt.entry_count > LDT_DIRECT_ENTRIES){ + i = mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE; + while(i-- > 0){ + free_page((long )mm->ldt.u.pages[i]); + } + } + mm->ldt.entry_count = 0; +} +#endif + +int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount) +{ + return(CHOOSE_MODE_PROC(do_modify_ldt_tt, do_modify_ldt_skas, func, + ptr, bytecount)); +} diff --git a/arch/um/sys-i386/stub_segv.c b/arch/um/sys-i386/stub_segv.c index 1e88b275eda..a37f672ec96 100644 --- a/arch/um/sys-i386/stub_segv.c +++ b/arch/um/sys-i386/stub_segv.c @@ -3,9 +3,11 @@ * Licensed under the GPL */ -#include <asm/signal.h> +#include <signal.h> +#include <sys/select.h> /* The only way I can see to get sigset_t */ #include <asm/unistd.h> #include "uml-config.h" +#include "sysdep/stub.h" #include "sysdep/sigcontext.h" #include "sysdep/faultinfo.h" @@ -13,13 +15,14 @@ void __attribute__ ((__section__ (".__syscall_stub"))) stub_segv_handler(int sig) { struct sigcontext *sc = (struct sigcontext *) (&sig + 1); + int pid; GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA), sc); - __asm__("movl %0, %%eax ; int $0x80": : "g" (__NR_getpid)); - __asm__("movl %%eax, %%ebx ; movl %0, %%eax ; movl %1, %%ecx ;" - "int $0x80": : "g" (__NR_kill), "g" (SIGUSR1)); + pid = stub_syscall0(__NR_getpid); + stub_syscall2(__NR_kill, pid, SIGUSR1); + /* Load pointer to sigcontext into esp, since we need to leave * the stack in its original form when we do the sigreturn here, by * hand. diff --git a/arch/um/sys-i386/sysrq.c b/arch/um/sys-i386/sysrq.c index e3706d15c4f..d5244f07053 100644 --- a/arch/um/sys-i386/sysrq.c +++ b/arch/um/sys-i386/sysrq.c @@ -88,9 +88,7 @@ void show_trace(struct task_struct* task, unsigned long * stack) task = current; if (task != current) { - //ebp = (unsigned long) KSTK_EBP(task); - /* Which one? No actual difference - just coding style.*/ - ebp = (unsigned long) PT_REGS_EBP(&task->thread.regs); + ebp = (unsigned long) KSTK_EBP(task); } else { asm ("movl %%ebp, %0" : "=r" (ebp) : ); } @@ -99,15 +97,6 @@ void show_trace(struct task_struct* task, unsigned long * stack) ((unsigned long)stack & (~(THREAD_SIZE - 1))); print_context_stack(context, stack, ebp); - /*while (((long) stack & (THREAD_SIZE-1)) != 0) { - addr = *stack; - if (__kernel_text_address(addr)) { - printk("%08lx: [<%08lx>]", (unsigned long) stack, addr); - print_symbol(" %s", addr); - printk("\n"); - } - stack++; - }*/ printk("\n"); } diff --git a/arch/um/sys-i386/user-offsets.c b/arch/um/sys-i386/user-offsets.c index 3ceaabceb3d..26b68675053 100644 --- a/arch/um/sys-i386/user-offsets.c +++ b/arch/um/sys-i386/user-offsets.c @@ -7,47 +7,48 @@ #define DEFINE(sym, val) \ asm volatile("\n->" #sym " %0 " #val : : "i" (val)) +#define DEFINE_LONGS(sym, val) \ + asm volatile("\n->" #sym " %0 " #val : : "i" (val/sizeof(unsigned long))) + #define OFFSET(sym, str, mem) \ DEFINE(sym, offsetof(struct str, mem)); void foo(void) { - OFFSET(SC_IP, sigcontext, eip); - OFFSET(SC_SP, sigcontext, esp); - OFFSET(SC_FS, sigcontext, fs); - OFFSET(SC_GS, sigcontext, gs); - OFFSET(SC_DS, sigcontext, ds); - OFFSET(SC_ES, sigcontext, es); - OFFSET(SC_SS, sigcontext, ss); - OFFSET(SC_CS, sigcontext, cs); - OFFSET(SC_EFLAGS, sigcontext, eflags); - OFFSET(SC_EAX, sigcontext, eax); - OFFSET(SC_EBX, sigcontext, ebx); - OFFSET(SC_ECX, sigcontext, ecx); - OFFSET(SC_EDX, sigcontext, edx); - OFFSET(SC_EDI, sigcontext, edi); - OFFSET(SC_ESI, sigcontext, esi); - OFFSET(SC_EBP, sigcontext, ebp); - OFFSET(SC_TRAPNO, sigcontext, trapno); - OFFSET(SC_ERR, sigcontext, err); - OFFSET(SC_CR2, sigcontext, cr2); - OFFSET(SC_FPSTATE, sigcontext, fpstate); - OFFSET(SC_SIGMASK, sigcontext, oldmask); - OFFSET(SC_FP_CW, _fpstate, cw); - OFFSET(SC_FP_SW, _fpstate, sw); - OFFSET(SC_FP_TAG, _fpstate, tag); - OFFSET(SC_FP_IPOFF, _fpstate, ipoff); - OFFSET(SC_FP_CSSEL, _fpstate, cssel); - OFFSET(SC_FP_DATAOFF, _fpstate, dataoff); - OFFSET(SC_FP_DATASEL, _fpstate, datasel); - OFFSET(SC_FP_ST, _fpstate, _st); - OFFSET(SC_FXSR_ENV, _fpstate, _fxsr_env); + OFFSET(HOST_SC_IP, sigcontext, eip); + OFFSET(HOST_SC_SP, sigcontext, esp); + OFFSET(HOST_SC_FS, sigcontext, fs); + OFFSET(HOST_SC_GS, sigcontext, gs); + OFFSET(HOST_SC_DS, sigcontext, ds); + OFFSET(HOST_SC_ES, sigcontext, es); + OFFSET(HOST_SC_SS, sigcontext, ss); + OFFSET(HOST_SC_CS, sigcontext, cs); + OFFSET(HOST_SC_EFLAGS, sigcontext, eflags); + OFFSET(HOST_SC_EAX, sigcontext, eax); + OFFSET(HOST_SC_EBX, sigcontext, ebx); + OFFSET(HOST_SC_ECX, sigcontext, ecx); + OFFSET(HOST_SC_EDX, sigcontext, edx); + OFFSET(HOST_SC_EDI, sigcontext, edi); + OFFSET(HOST_SC_ESI, sigcontext, esi); + OFFSET(HOST_SC_EBP, sigcontext, ebp); + OFFSET(HOST_SC_TRAPNO, sigcontext, trapno); + OFFSET(HOST_SC_ERR, sigcontext, err); + OFFSET(HOST_SC_CR2, sigcontext, cr2); + OFFSET(HOST_SC_FPSTATE, sigcontext, fpstate); + OFFSET(HOST_SC_SIGMASK, sigcontext, oldmask); + OFFSET(HOST_SC_FP_CW, _fpstate, cw); + OFFSET(HOST_SC_FP_SW, _fpstate, sw); + OFFSET(HOST_SC_FP_TAG, _fpstate, tag); + OFFSET(HOST_SC_FP_IPOFF, _fpstate, ipoff); + OFFSET(HOST_SC_FP_CSSEL, _fpstate, cssel); + OFFSET(HOST_SC_FP_DATAOFF, _fpstate, dataoff); + OFFSET(HOST_SC_FP_DATASEL, _fpstate, datasel); + OFFSET(HOST_SC_FP_ST, _fpstate, _st); + OFFSET(HOST_SC_FXSR_ENV, _fpstate, _fxsr_env); DEFINE(HOST_FRAME_SIZE, FRAME_SIZE); - DEFINE(HOST_FP_SIZE, - sizeof(struct user_i387_struct) / sizeof(unsigned long)); - DEFINE(HOST_XFP_SIZE, - sizeof(struct user_fxsr_struct) / sizeof(unsigned long)); + DEFINE_LONGS(HOST_FP_SIZE, sizeof(struct user_i387_struct)); + DEFINE_LONGS(HOST_XFP_SIZE, sizeof(struct user_fxsr_struct)); DEFINE(HOST_IP, EIP); DEFINE(HOST_SP, UESP); @@ -65,5 +66,5 @@ void foo(void) DEFINE(HOST_FS, FS); DEFINE(HOST_ES, ES); DEFINE(HOST_GS, GS); - DEFINE(__UM_FRAME_SIZE, sizeof(struct user_regs_struct)); + DEFINE(UM_FRAME_SIZE, sizeof(struct user_regs_struct)); } diff --git a/arch/um/sys-i386/util/Makefile b/arch/um/sys-i386/util/Makefile deleted file mode 100644 index bf61afd0b04..00000000000 --- a/arch/um/sys-i386/util/Makefile +++ /dev/null @@ -1,5 +0,0 @@ -hostprogs-y := mk_sc mk_thread -always := $(hostprogs-y) - -HOSTCFLAGS_mk_sc.o := -I$(objtree)/arch/um -HOSTCFLAGS_mk_thread.o := -I$(objtree)/arch/um diff --git a/arch/um/sys-i386/util/mk_sc.c b/arch/um/sys-i386/util/mk_sc.c deleted file mode 100644 index 04c0d73433a..00000000000 --- a/arch/um/sys-i386/util/mk_sc.c +++ /dev/null @@ -1,51 +0,0 @@ -#include <stdio.h> -#include <user-offsets.h> - -#define SC_OFFSET(name, field) \ - printf("#define " #name "(sc) *((unsigned long *) &(((char *) (sc))[%d]))\n",\ - name) - -#define SC_FP_OFFSET(name, field) \ - printf("#define " #name \ - "(sc) *((unsigned long *) &(((char *) (SC_FPSTATE(sc)))[%d]))\n",\ - name) - -#define SC_FP_OFFSET_PTR(name, field, type) \ - printf("#define " #name \ - "(sc) ((" type " *) &(((char *) (SC_FPSTATE(sc)))[%d]))\n",\ - name) - -int main(int argc, char **argv) -{ - SC_OFFSET(SC_IP, eip); - SC_OFFSET(SC_SP, esp); - SC_OFFSET(SC_FS, fs); - SC_OFFSET(SC_GS, gs); - SC_OFFSET(SC_DS, ds); - SC_OFFSET(SC_ES, es); - SC_OFFSET(SC_SS, ss); - SC_OFFSET(SC_CS, cs); - SC_OFFSET(SC_EFLAGS, eflags); - SC_OFFSET(SC_EAX, eax); - SC_OFFSET(SC_EBX, ebx); - SC_OFFSET(SC_ECX, ecx); - SC_OFFSET(SC_EDX, edx); - SC_OFFSET(SC_EDI, edi); - SC_OFFSET(SC_ESI, esi); - SC_OFFSET(SC_EBP, ebp); - SC_OFFSET(SC_TRAPNO, trapno); - SC_OFFSET(SC_ERR, err); - SC_OFFSET(SC_CR2, cr2); - SC_OFFSET(SC_FPSTATE, fpstate); - SC_OFFSET(SC_SIGMASK, oldmask); - SC_FP_OFFSET(SC_FP_CW, cw); - SC_FP_OFFSET(SC_FP_SW, sw); - SC_FP_OFFSET(SC_FP_TAG, tag); - SC_FP_OFFSET(SC_FP_IPOFF, ipoff); - SC_FP_OFFSET(SC_FP_CSSEL, cssel); - SC_FP_OFFSET(SC_FP_DATAOFF, dataoff); - SC_FP_OFFSET(SC_FP_DATASEL, datasel); - SC_FP_OFFSET_PTR(SC_FP_ST, _st, "struct _fpstate"); - SC_FP_OFFSET_PTR(SC_FXSR_ENV, _fxsr_env, "void"); - return(0); -} diff --git a/arch/um/sys-i386/util/mk_thread.c b/arch/um/sys-i386/util/mk_thread.c deleted file mode 100644 index 7470d0dda67..00000000000 --- a/arch/um/sys-i386/util/mk_thread.c +++ /dev/null @@ -1,22 +0,0 @@ -#include <stdio.h> -#include <kernel-offsets.h> - -int main(int argc, char **argv) -{ - printf("/*\n"); - printf(" * Generated by mk_thread\n"); - printf(" */\n"); - printf("\n"); - printf("#ifndef __UM_THREAD_H\n"); - printf("#define __UM_THREAD_H\n"); - printf("\n"); - printf("#define TASK_DEBUGREGS(task) ((unsigned long *) " - "&(((char *) (task))[%d]))\n", TASK_DEBUGREGS); -#ifdef TASK_EXTERN_PID - printf("#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[%d]))\n", - TASK_EXTERN_PID); -#endif - printf("\n"); - printf("#endif\n"); - return(0); -} diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile index f0ab574d1e9..00b2025427d 100644 --- a/arch/um/sys-x86_64/Makefile +++ b/arch/um/sys-x86_64/Makefile @@ -5,16 +5,16 @@ # #XXX: why into lib-y? -lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o mem.o memcpy.o \ +lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o ldt.o mem.o memcpy.o \ ptrace.o ptrace_user.o sigcontext.o signal.o stub.o \ stub_segv.o syscalls.o syscall_table.o sysrq.o thunk.o obj-y := ksyms.o obj-$(CONFIG_MODULES) += module.o um_module.o -USER_OBJS := ptrace_user.o sigcontext.o +USER_OBJS := ptrace_user.o sigcontext.o stub_segv.o -SYMLINKS = bitops.c csum-copy.S csum-partial.c csum-wrappers.c memcpy.S \ +SYMLINKS = bitops.c csum-copy.S csum-partial.c csum-wrappers.c ldt.c memcpy.S \ thunk.S module.c include arch/um/scripts/Makefile.rules @@ -23,12 +23,11 @@ bitops.c-dir = lib csum-copy.S-dir = lib csum-partial.c-dir = lib csum-wrappers.c-dir = lib +ldt.c-dir = /arch/um/sys-i386 memcpy.S-dir = lib thunk.S-dir = lib module.c-dir = kernel $(obj)/stub_segv.o: _c_flags = $(call unprofile,$(CFLAGS)) -subdir- := util - include arch/um/scripts/Makefile.unmap diff --git a/arch/um/sys-x86_64/kernel-offsets.c b/arch/um/sys-x86_64/kernel-offsets.c index 998541eade4..bfcb104b846 100644 --- a/arch/um/sys-x86_64/kernel-offsets.c +++ b/arch/um/sys-x86_64/kernel-offsets.c @@ -19,7 +19,7 @@ void foo(void) { #ifdef CONFIG_MODE_TT - OFFSET(TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid); + OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid); #endif #include <common-offsets.h> } diff --git a/arch/um/sys-x86_64/stub_segv.c b/arch/um/sys-x86_64/stub_segv.c index 65a131b362b..a2709953319 100644 --- a/arch/um/sys-x86_64/stub_segv.c +++ b/arch/um/sys-x86_64/stub_segv.c @@ -3,30 +3,49 @@ * Licensed under the GPL */ -#include <asm/signal.h> +#include <stddef.h> +#include <signal.h> #include <linux/compiler.h> #include <asm/unistd.h> -#include <asm/ucontext.h> #include "uml-config.h" #include "sysdep/sigcontext.h" #include "sysdep/faultinfo.h" +#include "sysdep/stub.h" + +/* Copied from sys-x86_64/signal.c - Can't find an equivalent definition + * in the libc headers anywhere. + */ +struct rt_sigframe +{ + char *pretcode; + struct ucontext uc; + struct siginfo info; +}; + +/* Copied here from <linux/kernel.h> - we're userspace. */ +#define container_of(ptr, type, member) ({ \ + const typeof( ((type *)0)->member ) *__mptr = (ptr); \ + (type *)( (char *)__mptr - offsetof(type,member) );}) void __attribute__ ((__section__ (".__syscall_stub"))) stub_segv_handler(int sig) { struct ucontext *uc; + int pid; __asm__("movq %%rdx, %0" : "=g" (uc) :); - GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA), - &uc->uc_mcontext); + GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA), + &uc->uc_mcontext); + + pid = stub_syscall0(__NR_getpid); + stub_syscall2(__NR_kill, pid, SIGUSR1); - __asm__("movq %0, %%rax ; syscall": : "g" (__NR_getpid)); - __asm__("movq %%rax, %%rdi ; movq %0, %%rax ; movq %1, %%rsi ;" - "syscall": : "g" (__NR_kill), "g" (SIGUSR1)); - /* Two popqs to restore the stack to the state just before entering - * the handler, one pops the return address, the other pops the frame - * pointer. + /* sys_sigreturn expects that the stack pointer will be 8 bytes into + * the signal frame. So, we use the ucontext pointer, which we know + * already, to get the signal frame pointer, and add 8 to that. */ - __asm__("popq %%rax ; popq %%rax ; movq %0, %%rax ; syscall" : : "g" - (__NR_rt_sigreturn)); + __asm__("movq %0, %%rsp; movq %1, %%rax ; syscall": : + "g" ((unsigned long) container_of(uc, struct rt_sigframe, + uc) + 8), + "g" (__NR_rt_sigreturn)); } diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c index 3259a4db453..6acee5c4ada 100644 --- a/arch/um/sys-x86_64/syscalls.c +++ b/arch/um/sys-x86_64/syscalls.c @@ -29,81 +29,6 @@ asmlinkage long sys_uname64(struct new_utsname __user * name) } #ifdef CONFIG_MODE_TT -extern int modify_ldt(int func, void *ptr, unsigned long bytecount); - -long sys_modify_ldt_tt(int func, void *ptr, unsigned long bytecount) -{ - /* XXX This should check VERIFY_WRITE depending on func, check this - * in i386 as well. - */ - if (!access_ok(VERIFY_READ, ptr, bytecount)) - return -EFAULT; - return(modify_ldt(func, ptr, bytecount)); -} -#endif - -#ifdef CONFIG_MODE_SKAS -extern int userspace_pid[]; - -#include "skas_ptrace.h" - -long sys_modify_ldt_skas(int func, void *ptr, unsigned long bytecount) -{ - struct ptrace_ldt ldt; - void *buf; - int res, n; - - buf = kmalloc(bytecount, GFP_KERNEL); - if(buf == NULL) - return(-ENOMEM); - - res = 0; - - switch(func){ - case 1: - case 0x11: - res = copy_from_user(buf, ptr, bytecount); - break; - } - - if(res != 0){ - res = -EFAULT; - goto out; - } - - ldt = ((struct ptrace_ldt) { .func = func, - .ptr = buf, - .bytecount = bytecount }); -#warning Need to look up userspace_pid by cpu - res = ptrace(PTRACE_LDT, userspace_pid[0], 0, (unsigned long) &ldt); - if(res < 0) - goto out; - - switch(func){ - case 0: - case 2: - n = res; - res = copy_to_user(ptr, buf, n); - if(res != 0) - res = -EFAULT; - else - res = n; - break; - } - - out: - kfree(buf); - return(res); -} -#endif - -long sys_modify_ldt(int func, void *ptr, unsigned long bytecount) -{ - return(CHOOSE_MODE_PROC(sys_modify_ldt_tt, sys_modify_ldt_skas, func, - ptr, bytecount)); -} - -#ifdef CONFIG_MODE_TT extern long arch_prctl(int code, unsigned long addr); static long arch_prctl_tt(int code, unsigned long addr) diff --git a/arch/um/sys-x86_64/user-offsets.c b/arch/um/sys-x86_64/user-offsets.c index 513d17ceafd..5a585bfbb8c 100644 --- a/arch/um/sys-x86_64/user-offsets.c +++ b/arch/um/sys-x86_64/user-offsets.c @@ -16,71 +16,76 @@ typedef __u32 u32; #define DEFINE(sym, val) \ asm volatile("\n->" #sym " %0 " #val : : "i" (val)) +#define DEFINE_LONGS(sym, val) \ + asm volatile("\n->" #sym " %0 " #val : : "i" (val/sizeof(unsigned long))) + #define OFFSET(sym, str, mem) \ DEFINE(sym, offsetof(struct str, mem)); void foo(void) { - OFFSET(SC_RBX, sigcontext, rbx); - OFFSET(SC_RCX, sigcontext, rcx); - OFFSET(SC_RDX, sigcontext, rdx); - OFFSET(SC_RSI, sigcontext, rsi); - OFFSET(SC_RDI, sigcontext, rdi); - OFFSET(SC_RBP, sigcontext, rbp); - OFFSET(SC_RAX, sigcontext, rax); - OFFSET(SC_R8, sigcontext, r8); - OFFSET(SC_R9, sigcontext, r9); - OFFSET(SC_R10, sigcontext, r10); - OFFSET(SC_R11, sigcontext, r11); - OFFSET(SC_R12, sigcontext, r12); - OFFSET(SC_R13, sigcontext, r13); - OFFSET(SC_R14, sigcontext, r14); - OFFSET(SC_R15, sigcontext, r15); - OFFSET(SC_IP, sigcontext, rip); - OFFSET(SC_SP, sigcontext, rsp); - OFFSET(SC_CR2, sigcontext, cr2); - OFFSET(SC_ERR, sigcontext, err); - OFFSET(SC_TRAPNO, sigcontext, trapno); - OFFSET(SC_CS, sigcontext, cs); - OFFSET(SC_FS, sigcontext, fs); - OFFSET(SC_GS, sigcontext, gs); - OFFSET(SC_EFLAGS, sigcontext, eflags); - OFFSET(SC_SIGMASK, sigcontext, oldmask); + OFFSET(HOST_SC_RBX, sigcontext, rbx); + OFFSET(HOST_SC_RCX, sigcontext, rcx); + OFFSET(HOST_SC_RDX, sigcontext, rdx); + OFFSET(HOST_SC_RSI, sigcontext, rsi); + OFFSET(HOST_SC_RDI, sigcontext, rdi); + OFFSET(HOST_SC_RBP, sigcontext, rbp); + OFFSET(HOST_SC_RAX, sigcontext, rax); + OFFSET(HOST_SC_R8, sigcontext, r8); + OFFSET(HOST_SC_R9, sigcontext, r9); + OFFSET(HOST_SC_R10, sigcontext, r10); + OFFSET(HOST_SC_R11, sigcontext, r11); + OFFSET(HOST_SC_R12, sigcontext, r12); + OFFSET(HOST_SC_R13, sigcontext, r13); + OFFSET(HOST_SC_R14, sigcontext, r14); + OFFSET(HOST_SC_R15, sigcontext, r15); + OFFSET(HOST_SC_IP, sigcontext, rip); + OFFSET(HOST_SC_SP, sigcontext, rsp); + OFFSET(HOST_SC_CR2, sigcontext, cr2); + OFFSET(HOST_SC_ERR, sigcontext, err); + OFFSET(HOST_SC_TRAPNO, sigcontext, trapno); + OFFSET(HOST_SC_CS, sigcontext, cs); + OFFSET(HOST_SC_FS, sigcontext, fs); + OFFSET(HOST_SC_GS, sigcontext, gs); + OFFSET(HOST_SC_EFLAGS, sigcontext, eflags); + OFFSET(HOST_SC_SIGMASK, sigcontext, oldmask); #if 0 - OFFSET(SC_ORIG_RAX, sigcontext, orig_rax); - OFFSET(SC_DS, sigcontext, ds); - OFFSET(SC_ES, sigcontext, es); - OFFSET(SC_SS, sigcontext, ss); + OFFSET(HOST_SC_ORIG_RAX, sigcontext, orig_rax); + OFFSET(HOST_SC_DS, sigcontext, ds); + OFFSET(HOST_SC_ES, sigcontext, es); + OFFSET(HOST_SC_SS, sigcontext, ss); #endif - DEFINE(HOST_FRAME_SIZE, FRAME_SIZE); - DEFINE(HOST_RBX, RBX); - DEFINE(HOST_RCX, RCX); - DEFINE(HOST_RDI, RDI); - DEFINE(HOST_RSI, RSI); - DEFINE(HOST_RDX, RDX); - DEFINE(HOST_RBP, RBP); - DEFINE(HOST_RAX, RAX); - DEFINE(HOST_R8, R8); - DEFINE(HOST_R9, R9); - DEFINE(HOST_R10, R10); - DEFINE(HOST_R11, R11); - DEFINE(HOST_R12, R12); - DEFINE(HOST_R13, R13); - DEFINE(HOST_R14, R14); - DEFINE(HOST_R15, R15); - DEFINE(HOST_ORIG_RAX, ORIG_RAX); - DEFINE(HOST_CS, CS); - DEFINE(HOST_SS, SS); - DEFINE(HOST_EFLAGS, EFLAGS); + DEFINE_LONGS(HOST_FRAME_SIZE, FRAME_SIZE); + DEFINE(HOST_FP_SIZE, 0); + DEFINE(HOST_XFP_SIZE, 0); + DEFINE_LONGS(HOST_RBX, RBX); + DEFINE_LONGS(HOST_RCX, RCX); + DEFINE_LONGS(HOST_RDI, RDI); + DEFINE_LONGS(HOST_RSI, RSI); + DEFINE_LONGS(HOST_RDX, RDX); + DEFINE_LONGS(HOST_RBP, RBP); + DEFINE_LONGS(HOST_RAX, RAX); + DEFINE_LONGS(HOST_R8, R8); + DEFINE_LONGS(HOST_R9, R9); + DEFINE_LONGS(HOST_R10, R10); + DEFINE_LONGS(HOST_R11, R11); + DEFINE_LONGS(HOST_R12, R12); + DEFINE_LONGS(HOST_R13, R13); + DEFINE_LONGS(HOST_R14, R14); + DEFINE_LONGS(HOST_R15, R15); + DEFINE_LONGS(HOST_ORIG_RAX, ORIG_RAX); + DEFINE_LONGS(HOST_CS, CS); + DEFINE_LONGS(HOST_SS, SS); + DEFINE_LONGS(HOST_EFLAGS, EFLAGS); #if 0 - DEFINE(HOST_FS, FS); - DEFINE(HOST_GS, GS); - DEFINE(HOST_DS, DS); - DEFINE(HOST_ES, ES); + DEFINE_LONGS(HOST_FS, FS); + DEFINE_LONGS(HOST_GS, GS); + DEFINE_LONGS(HOST_DS, DS); + DEFINE_LONGS(HOST_ES, ES); #endif - DEFINE(HOST_IP, RIP); - DEFINE(HOST_SP, RSP); - DEFINE(__UM_FRAME_SIZE, sizeof(struct user_regs_struct)); + DEFINE_LONGS(HOST_IP, RIP); + DEFINE_LONGS(HOST_SP, RSP); + DEFINE(UM_FRAME_SIZE, sizeof(struct user_regs_struct)); } diff --git a/arch/um/sys-x86_64/util/Makefile b/arch/um/sys-x86_64/util/Makefile deleted file mode 100644 index 75b052cfc20..00000000000 --- a/arch/um/sys-x86_64/util/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# Copyright 2003 - 2004 Pathscale, Inc -# Released under the GPL - -hostprogs-y := mk_sc mk_thread -always := $(hostprogs-y) - -HOSTCFLAGS_mk_sc.o := -I$(objtree)/arch/um -HOSTCFLAGS_mk_thread.o := -I$(objtree)/arch/um diff --git a/arch/um/sys-x86_64/util/mk_sc.c b/arch/um/sys-x86_64/util/mk_sc.c deleted file mode 100644 index 7619bc377c1..00000000000 --- a/arch/um/sys-x86_64/util/mk_sc.c +++ /dev/null @@ -1,47 +0,0 @@ -/* Copyright (C) 2003 - 2004 PathScale, Inc - * Released under the GPL - */ - -#include <stdio.h> -#include <user-offsets.h> - -#define SC_OFFSET(name) \ - printf("#define " #name \ - "(sc) *((unsigned long *) &(((char *) (sc))[%d]))\n",\ - name) - -int main(int argc, char **argv) -{ - SC_OFFSET(SC_RBX); - SC_OFFSET(SC_RCX); - SC_OFFSET(SC_RDX); - SC_OFFSET(SC_RSI); - SC_OFFSET(SC_RDI); - SC_OFFSET(SC_RBP); - SC_OFFSET(SC_RAX); - SC_OFFSET(SC_R8); - SC_OFFSET(SC_R9); - SC_OFFSET(SC_R10); - SC_OFFSET(SC_R11); - SC_OFFSET(SC_R12); - SC_OFFSET(SC_R13); - SC_OFFSET(SC_R14); - SC_OFFSET(SC_R15); - SC_OFFSET(SC_IP); - SC_OFFSET(SC_SP); - SC_OFFSET(SC_CR2); - SC_OFFSET(SC_ERR); - SC_OFFSET(SC_TRAPNO); - SC_OFFSET(SC_CS); - SC_OFFSET(SC_FS); - SC_OFFSET(SC_GS); - SC_OFFSET(SC_EFLAGS); - SC_OFFSET(SC_SIGMASK); -#if 0 - SC_OFFSET(SC_ORIG_RAX); - SC_OFFSET(SC_DS); - SC_OFFSET(SC_ES); - SC_OFFSET(SC_SS); -#endif - return(0); -} diff --git a/arch/um/sys-x86_64/util/mk_thread.c b/arch/um/sys-x86_64/util/mk_thread.c deleted file mode 100644 index 15517396e9c..00000000000 --- a/arch/um/sys-x86_64/util/mk_thread.c +++ /dev/null @@ -1,20 +0,0 @@ -#include <stdio.h> -#include <kernel-offsets.h> - -int main(int argc, char **argv) -{ - printf("/*\n"); - printf(" * Generated by mk_thread\n"); - printf(" */\n"); - printf("\n"); - printf("#ifndef __UM_THREAD_H\n"); - printf("#define __UM_THREAD_H\n"); - printf("\n"); -#ifdef TASK_EXTERN_PID - printf("#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[%d]))\n", - TASK_EXTERN_PID); -#endif - printf("\n"); - printf("#endif\n"); - return(0); -} diff --git a/arch/um/util/Makefile b/arch/um/util/Makefile deleted file mode 100644 index 4c7551c2803..00000000000 --- a/arch/um/util/Makefile +++ /dev/null @@ -1,5 +0,0 @@ -hostprogs-y := mk_task mk_constants -always := $(hostprogs-y) - -HOSTCFLAGS_mk_task.o := -I$(objtree)/arch/um -HOSTCFLAGS_mk_constants.o := -I$(objtree)/arch/um diff --git a/arch/um/util/mk_constants.c b/arch/um/util/mk_constants.c deleted file mode 100644 index ab217becc36..00000000000 --- a/arch/um/util/mk_constants.c +++ /dev/null @@ -1,32 +0,0 @@ -#include <stdio.h> -#include <kernel-offsets.h> - -#define SHOW_INT(sym) printf("#define %s %d\n", #sym, sym) -#define SHOW_STR(sym) printf("#define %s %s\n", #sym, sym) - -int main(int argc, char **argv) -{ - printf("/*\n"); - printf(" * Generated by mk_constants\n"); - printf(" */\n"); - printf("\n"); - printf("#ifndef __UM_CONSTANTS_H\n"); - printf("#define __UM_CONSTANTS_H\n"); - printf("\n"); - - SHOW_INT(UM_KERN_PAGE_SIZE); - - SHOW_STR(UM_KERN_EMERG); - SHOW_STR(UM_KERN_ALERT); - SHOW_STR(UM_KERN_CRIT); - SHOW_STR(UM_KERN_ERR); - SHOW_STR(UM_KERN_WARNING); - SHOW_STR(UM_KERN_NOTICE); - SHOW_STR(UM_KERN_INFO); - SHOW_STR(UM_KERN_DEBUG); - - SHOW_INT(UM_NSEC_PER_SEC); - printf("\n"); - printf("#endif\n"); - return(0); -} diff --git a/arch/um/util/mk_task.c b/arch/um/util/mk_task.c deleted file mode 100644 index 36c9606505e..00000000000 --- a/arch/um/util/mk_task.c +++ /dev/null @@ -1,30 +0,0 @@ -#include <stdio.h> -#include <kernel-offsets.h> - -void print_ptr(char *name, char *type, int offset) -{ - printf("#define %s(task) ((%s *) &(((char *) (task))[%d]))\n", name, type, - offset); -} - -void print(char *name, char *type, int offset) -{ - printf("#define %s(task) *((%s *) &(((char *) (task))[%d]))\n", name, type, - offset); -} - -int main(int argc, char **argv) -{ - printf("/*\n"); - printf(" * Generated by mk_task\n"); - printf(" */\n"); - printf("\n"); - printf("#ifndef __TASK_H\n"); - printf("#define __TASK_H\n"); - printf("\n"); - print_ptr("TASK_REGS", "union uml_pt_regs", TASK_REGS); - print("TASK_PID", "int", TASK_PID); - printf("\n"); - printf("#endif\n"); - return(0); -} |