diff options
Diffstat (limited to 'arch/um/kernel')
| -rw-r--r-- | arch/um/kernel/Makefile | 7 | ||||
| -rw-r--r-- | arch/um/kernel/helper.c | 165 | ||||
| -rw-r--r-- | arch/um/kernel/ksyms.c | 1 | ||||
| -rw-r--r-- | arch/um/kernel/main.c | 270 | ||||
| -rw-r--r-- | arch/um/kernel/mem.c | 4 | ||||
| -rw-r--r-- | arch/um/kernel/physmem.c | 4 | ||||
| -rw-r--r-- | arch/um/kernel/ptrace.c | 50 | ||||
| -rw-r--r-- | arch/um/kernel/sigio_user.c | 3 | ||||
| -rw-r--r-- | arch/um/kernel/skas/include/mmu-skas.h | 2 | ||||
| -rw-r--r-- | arch/um/kernel/skas/include/skas.h | 3 | ||||
| -rw-r--r-- | arch/um/kernel/skas/mem.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/skas/mmu.c | 44 | ||||
| -rw-r--r-- | arch/um/kernel/skas/process.c | 17 | ||||
| -rw-r--r-- | arch/um/kernel/skas/process_kern.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/tt/uaccess_user.c | 1 | ||||
| -rw-r--r-- | arch/um/kernel/uaccess.c | 30 | ||||
| -rw-r--r-- | arch/um/kernel/uaccess_user.c | 64 | ||||
| -rw-r--r-- | arch/um/kernel/um_arch.c | 10 | ||||
| -rw-r--r-- | arch/um/kernel/user_util.c | 1 |
19 files changed, 93 insertions, 587 deletions
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/helper.c b/arch/um/kernel/helper.c deleted file mode 100644 index 33fb0bd3b11..00000000000 --- a/arch/um/kernel/helper.c +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <errno.h> -#include <sched.h> -#include <sys/signal.h> -#include <sys/wait.h> -#include "user.h" -#include "kern_util.h" -#include "user_util.h" -#include "helper.h" -#include "os.h" - -struct helper_data { - void (*pre_exec)(void*); - void *pre_data; - char **argv; - int fd; -}; - -/* Debugging aid, changed only from gdb */ -int helper_pause = 0; - -static void helper_hup(int sig) -{ -} - -static int helper_child(void *arg) -{ - struct helper_data *data = arg; - char **argv = data->argv; - int errval; - - if(helper_pause){ - signal(SIGHUP, helper_hup); - pause(); - } - if(data->pre_exec != NULL) - (*data->pre_exec)(data->pre_data); - execvp(argv[0], argv); - 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); - return(0); -} - -/* Returns either the pid of the child process we run or -E* on failure. - * XXX The alloc_stack here breaks if this is called in the tracing thread */ -int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, - unsigned long *stack_out) -{ - struct helper_data data; - unsigned long stack, sp; - int pid, fds[2], ret, n; - - if((stack_out != NULL) && (*stack_out != 0)) - stack = *stack_out; - else stack = alloc_stack(0, um_in_interrupt()); - if(stack == 0) - return(-ENOMEM); - - ret = os_pipe(fds, 1, 0); - if(ret < 0){ - printk("run_helper : pipe failed, ret = %d\n", -ret); - goto out_free; - } - - ret = os_set_exec_close(fds[1], 1); - if(ret < 0){ - printk("run_helper : setting FD_CLOEXEC failed, ret = %d\n", - -ret); - goto out_close; - } - - sp = stack + page_size() - sizeof(void *); - data.pre_exec = pre_exec; - data.pre_data = pre_data; - data.argv = argv; - data.fd = fds[1]; - pid = clone(helper_child, (void *) sp, CLONE_VM | SIGCHLD, &data); - if(pid < 0){ - ret = -errno; - printk("run_helper : clone failed, errno = %d\n", errno); - goto out_close; - } - - os_close_file(fds[1]); - fds[1] = -1; - - /*Read the errno value from the child.*/ - n = os_read_file(fds[0], &ret, sizeof(ret)); - if(n < 0){ - printk("run_helper : read on pipe failed, ret = %d\n", -n); - ret = n; - os_kill_process(pid, 1); - } - else if(n != 0){ - CATCH_EINTR(n = waitpid(pid, NULL, 0)); - ret = -errno; - } else { - ret = pid; - } - -out_close: - if (fds[1] != -1) - os_close_file(fds[1]); - os_close_file(fds[0]); -out_free: - if(stack_out == NULL) - free_stack(stack, 0); - else *stack_out = stack; - return(ret); -} - -int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags, - unsigned long *stack_out, int stack_order) -{ - unsigned long stack, sp; - int pid, status, err; - - stack = alloc_stack(stack_order, um_in_interrupt()); - if(stack == 0) return(-ENOMEM); - - sp = stack + (page_size() << stack_order) - sizeof(void *); - pid = clone(proc, (void *) sp, flags | SIGCHLD, arg); - if(pid < 0){ - err = -errno; - printk("run_helper_thread : clone failed, errno = %d\n", - errno); - return err; - } - if(stack_out == NULL){ - CATCH_EINTR(pid = waitpid(pid, &status, 0)); - if(pid < 0){ - err = -errno; - printk("run_helper_thread - wait failed, errno = %d\n", - errno); - pid = err; - } - if(!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) - printk("run_helper_thread - thread returned status " - "0x%x\n", status); - free_stack(stack, stack_order); - } - else *stack_out = stack; - return(pid); -} - -int helper_wait(int pid) -{ - int ret; - - CATCH_EINTR(ret = waitpid(pid, NULL, WNOHANG)); - if(ret < 0){ - ret = -errno; - printk("helper_wait : waitpid failed, errno = %d\n", errno); - } - return(ret); -} 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/main.c b/arch/um/kernel/main.c deleted file mode 100644 index d31027f0fe3..00000000000 --- a/arch/um/kernel/main.c +++ /dev/null @@ -1,270 +0,0 @@ -/* - * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com) - * Licensed under the GPL - */ - -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <signal.h> -#include <errno.h> -#include <sys/resource.h> -#include <sys/mman.h> -#include <sys/user.h> -#include <asm/page.h> -#include "user_util.h" -#include "kern_util.h" -#include "mem_user.h" -#include "signal_user.h" -#include "time_user.h" -#include "irq_user.h" -#include "user.h" -#include "init.h" -#include "mode.h" -#include "choose-mode.h" -#include "uml-config.h" -#include "os.h" - -/* Set in set_stklim, which is called from main and __wrap_malloc. - * __wrap_malloc only calls it if main hasn't started. - */ -unsigned long stacksizelim; - -/* Set in main */ -char *linux_prog; - -#define PGD_BOUND (4 * 1024 * 1024) -#define STACKSIZE (8 * 1024 * 1024) -#define THREAD_NAME_LEN (256) - -static void set_stklim(void) -{ - struct rlimit lim; - - if(getrlimit(RLIMIT_STACK, &lim) < 0){ - perror("getrlimit"); - exit(1); - } - if((lim.rlim_cur == RLIM_INFINITY) || (lim.rlim_cur > STACKSIZE)){ - lim.rlim_cur = STACKSIZE; - if(setrlimit(RLIMIT_STACK, &lim) < 0){ - perror("setrlimit"); - exit(1); - } - } - stacksizelim = (lim.rlim_cur + PGD_BOUND - 1) & ~(PGD_BOUND - 1); -} - -static __init void do_uml_initcalls(void) -{ - initcall_t *call; - - call = &__uml_initcall_start; - while (call < &__uml_initcall_end){; - (*call)(); - call++; - } -} - -static void last_ditch_exit(int sig) -{ - signal(SIGINT, SIG_DFL); - signal(SIGTERM, SIG_DFL); - signal(SIGHUP, SIG_DFL); - uml_cleanup(); - exit(1); -} - -extern int uml_exitcode; - -extern void scan_elf_aux( char **envp); - -int main(int argc, char **argv, char **envp) -{ - char **new_argv; - sigset_t mask; - int ret, i, err; - - /* Enable all signals except SIGIO - in some environments, we can - * enter with some signals blocked - */ - - sigemptyset(&mask); - sigaddset(&mask, SIGIO); - if(sigprocmask(SIG_SETMASK, &mask, NULL) < 0){ - perror("sigprocmask"); - exit(1); - } - -#ifdef UML_CONFIG_CMDLINE_ON_HOST - /* Allocate memory for thread command lines */ - if(argc < 2 || strlen(argv[1]) < THREAD_NAME_LEN - 1){ - - char padding[THREAD_NAME_LEN] = { - [ 0 ... THREAD_NAME_LEN - 2] = ' ', '\0' - }; - - new_argv = malloc((argc + 2) * sizeof(char*)); - if(!new_argv) { - perror("Allocating extended argv"); - exit(1); - } - - new_argv[0] = argv[0]; - new_argv[1] = padding; - - for(i = 2; i <= argc; i++) - new_argv[i] = argv[i - 1]; - new_argv[argc + 1] = NULL; - - execvp(new_argv[0], new_argv); - perror("execing with extended args"); - exit(1); - } -#endif - - linux_prog = argv[0]; - - set_stklim(); - - new_argv = malloc((argc + 1) * sizeof(char *)); - if(new_argv == NULL){ - perror("Mallocing argv"); - exit(1); - } - for(i=0;i<argc;i++){ - new_argv[i] = strdup(argv[i]); - if(new_argv[i] == NULL){ - perror("Mallocing an arg"); - exit(1); - } - } - new_argv[argc] = NULL; - - set_handler(SIGINT, last_ditch_exit, SA_ONESHOT | SA_NODEFER, -1); - set_handler(SIGTERM, last_ditch_exit, SA_ONESHOT | SA_NODEFER, -1); - set_handler(SIGHUP, last_ditch_exit, SA_ONESHOT | SA_NODEFER, -1); - - scan_elf_aux( envp); - - do_uml_initcalls(); - ret = linux_main(argc, argv); - - /* Disable SIGPROF - I have no idea why libc doesn't do this or turn - * off the profiling time, but UML dies with a SIGPROF just before - * exiting when profiling is active. - */ - 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(); - - /* Reboot */ - if(ret){ - printf("\n"); - execvp(new_argv[0], new_argv); - perror("Failed to exec kernel"); - ret = 1; - } - printf("\n"); - return(uml_exitcode); -} - -#define CAN_KMALLOC() \ - (kmalloc_ok && CHOOSE_MODE((os_getpid() != tracing_pid), 1)) - -extern void *__real_malloc(int); - -void *__wrap_malloc(int size) -{ - void *ret; - - if(!CAN_KMALLOC()) - return(__real_malloc(size)); - else if(size <= PAGE_SIZE) /* finding contiguos pages can be hard*/ - ret = um_kmalloc(size); - else ret = um_vmalloc(size); - - /* glibc people insist that if malloc fails, errno should be - * set by malloc as well. So we do. - */ - if(ret == NULL) - errno = ENOMEM; - - return(ret); -} - -void *__wrap_calloc(int n, int size) -{ - void *ptr = __wrap_malloc(n * size); - - if(ptr == NULL) return(NULL); - memset(ptr, 0, n * size); - return(ptr); -} - -extern void __real_free(void *); - -extern unsigned long high_physmem; - -void __wrap_free(void *ptr) -{ - unsigned long addr = (unsigned long) ptr; - - /* We need to know how the allocation happened, so it can be correctly - * freed. This is done by seeing what region of memory the pointer is - * in - - * physical memory - kmalloc/kfree - * kernel virtual memory - vmalloc/vfree - * anywhere else - malloc/free - * If kmalloc is not yet possible, then either high_physmem and/or - * end_vm are still 0 (as at startup), in which case we call free, or - * we have set them, but anyway addr has not been allocated from those - * areas. So, in both cases __real_free is called. - * - * CAN_KMALLOC is checked because it would be bad to free a buffer - * with kmalloc/vmalloc after they have been turned off during - * shutdown. - * XXX: However, we sometimes shutdown CAN_KMALLOC temporarily, so - * there is a possibility for memory leaks. - */ - - if((addr >= uml_physmem) && (addr < high_physmem)){ - if(CAN_KMALLOC()) - kfree(ptr); - } - else if((addr >= start_vm) && (addr < end_vm)){ - if(CAN_KMALLOC()) - vfree(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/kernel/mem.c b/arch/um/kernel/mem.c index 462cc9d6538..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); /* 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/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 a52751108aa..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"); 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/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 9e5e39cea82..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" @@ -74,13 +75,12 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc, 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; @@ -102,33 +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; } 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/tt/uaccess_user.c b/arch/um/kernel/tt/uaccess_user.c index 8c220f054b6..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) 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 93dc782dc1c..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) { @@ -402,7 +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 } @@ -414,8 +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); } @@ -426,7 +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/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" |