diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/um/Kconfig.i386 | 14 | ||||
-rw-r--r-- | arch/um/Kconfig.x86_64 | 14 | ||||
-rw-r--r-- | arch/um/defconfig | 3 | ||||
-rw-r--r-- | arch/um/include/as-layout.h | 24 | ||||
-rw-r--r-- | arch/um/include/sysdep-i386/stub.h | 11 | ||||
-rw-r--r-- | arch/um/include/sysdep-x86_64/stub.h | 13 | ||||
-rw-r--r-- | arch/um/kernel/exec.c | 3 | ||||
-rw-r--r-- | arch/um/kernel/skas/clone.c | 6 | ||||
-rw-r--r-- | arch/um/kernel/skas/mmu.c | 5 | ||||
-rw-r--r-- | arch/um/kernel/skas/process.c | 2 | ||||
-rw-r--r-- | arch/um/kernel/tlb.c | 6 | ||||
-rw-r--r-- | arch/um/kernel/um_arch.c | 3 | ||||
-rw-r--r-- | arch/um/os-Linux/skas/mem.c | 8 | ||||
-rw-r--r-- | arch/um/os-Linux/skas/process.c | 21 | ||||
-rw-r--r-- | arch/um/sys-i386/stub.S | 9 | ||||
-rw-r--r-- | arch/um/sys-i386/stub_segv.c | 4 | ||||
-rw-r--r-- | arch/um/sys-x86_64/stub.S | 9 | ||||
-rw-r--r-- | arch/um/sys-x86_64/stub_segv.c | 3 |
18 files changed, 81 insertions, 77 deletions
diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386 index d6cffb27fff..9876d80d85d 100644 --- a/arch/um/Kconfig.i386 +++ b/arch/um/Kconfig.i386 @@ -65,20 +65,6 @@ config 3_LEVEL_PGTABLES However, this it experimental on 32-bit architectures, so if unsure say N (on x86-64 it's automatically enabled, instead, as it's safe there). -config STUB_CODE - hex - default 0xbfffe000 if !HOST_VMSPLIT_2G - default 0x7fffe000 if HOST_VMSPLIT_2G - -config STUB_DATA - hex - default 0xbffff000 if !HOST_VMSPLIT_2G - default 0x7ffff000 if HOST_VMSPLIT_2G - -config STUB_START - hex - default STUB_CODE - config ARCH_HAS_SC_SIGNALS bool default y diff --git a/arch/um/Kconfig.x86_64 b/arch/um/Kconfig.x86_64 index f60e9e50642..d632e9a89cc 100644 --- a/arch/um/Kconfig.x86_64 +++ b/arch/um/Kconfig.x86_64 @@ -17,24 +17,12 @@ config SEMAPHORE_SLEEPERS config TOP_ADDR hex - default 0x80000000 + default 0x7fc0000000 config 3_LEVEL_PGTABLES bool default y -config STUB_CODE - hex - default 0x7fbfffe000 - -config STUB_DATA - hex - default 0x7fbffff000 - -config STUB_START - hex - default STUB_CODE - config ARCH_HAS_SC_SIGNALS bool default n diff --git a/arch/um/defconfig b/arch/um/defconfig index 1cbbe980f10..f609edede06 100644 --- a/arch/um/defconfig +++ b/arch/um/defconfig @@ -59,9 +59,6 @@ CONFIG_SEMAPHORE_SLEEPERS=y # CONFIG_HOST_2G_2G is not set CONFIG_TOP_ADDR=0xc0000000 # CONFIG_3_LEVEL_PGTABLES is not set -CONFIG_STUB_CODE=0xbfffe000 -CONFIG_STUB_DATA=0xbffff000 -CONFIG_STUB_START=0xbfffe000 CONFIG_ARCH_HAS_SC_SIGNALS=y CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA=y CONFIG_GENERIC_HWEIGHT=y diff --git a/arch/um/include/as-layout.h b/arch/um/include/as-layout.h index 2f16a1c7d61..a5cdf953e04 100644 --- a/arch/um/include/as-layout.h +++ b/arch/um/include/as-layout.h @@ -6,6 +6,28 @@ #ifndef __START_H__ #define __START_H__ +#include "uml-config.h" +#include "kern_constants.h" + +/* + * Assembly doesn't want any casting, but C does, so define these + * without casts here, and define new symbols with casts inside the C + * section. + */ +#define ASM_STUB_CODE (UML_CONFIG_TOP_ADDR - 2 * UM_KERN_PAGE_SIZE) +#define ASM_STUB_DATA (UML_CONFIG_TOP_ADDR - UM_KERN_PAGE_SIZE) +#define ASM_STUB_START ASM_STUB_CODE + +/* + * This file is included by the assembly stubs, which just want the + * definitions above. + */ +#ifndef __ASSEMBLY__ + +#define STUB_CODE ((unsigned long) ASM_STUB_CODE) +#define STUB_DATA ((unsigned long) ASM_STUB_DATA) +#define STUB_START ((unsigned long) ASM_STUB_START) + #include "sysdep/ptrace.h" struct cpu_task { @@ -32,3 +54,5 @@ extern int linux_main(int argc, char **argv); extern void (*sig_info[])(int, struct uml_pt_regs *); #endif + +#endif diff --git a/arch/um/include/sysdep-i386/stub.h b/arch/um/include/sysdep-i386/stub.h index 19c85f330fc..8c097b87fca 100644 --- a/arch/um/include/sysdep-i386/stub.h +++ b/arch/um/include/sysdep-i386/stub.h @@ -9,6 +9,7 @@ #include <sys/mman.h> #include <asm/ptrace.h> #include <asm/unistd.h> +#include "as-layout.h" #include "stub-data.h" #include "kern_constants.h" #include "uml-config.h" @@ -89,12 +90,12 @@ static inline void remap_stack(int fd, unsigned long offset) { __asm__ volatile ("movl %%eax,%%ebp ; movl %0,%%eax ; int $0x80 ;" "movl %7, %%ebx ; movl %%eax, (%%ebx)" - : : "g" (STUB_MMAP_NR), "b" (UML_CONFIG_STUB_DATA), - "c" (UM_KERN_PAGE_SIZE), + : : "g" (STUB_MMAP_NR), "b" (STUB_DATA), + "c" (UM_KERN_PAGE_SIZE), "d" (PROT_READ | PROT_WRITE), - "S" (MAP_FIXED | MAP_SHARED), "D" (fd), - "a" (offset), - "i" (&((struct stub_data *) UML_CONFIG_STUB_DATA)->err) + "S" (MAP_FIXED | MAP_SHARED), "D" (fd), + "a" (offset), + "i" (&((struct stub_data *) STUB_DATA)->err) : "memory"); } diff --git a/arch/um/include/sysdep-x86_64/stub.h b/arch/um/include/sysdep-x86_64/stub.h index 92e989f8176..655f9c2de3a 100644 --- a/arch/um/include/sysdep-x86_64/stub.h +++ b/arch/um/include/sysdep-x86_64/stub.h @@ -9,6 +9,7 @@ #include <sys/mman.h> #include <asm/unistd.h> #include <sysdep/ptrace_user.h> +#include "as-layout.h" #include "stub-data.h" #include "kern_constants.h" #include "uml-config.h" @@ -94,13 +95,13 @@ static inline void remap_stack(long fd, unsigned long offset) { __asm__ volatile ("movq %4,%%r10 ; movq %5,%%r8 ; " "movq %6, %%r9; " __syscall "; movq %7, %%rbx ; " - "movq %%rax, (%%rbx)": - : "a" (STUB_MMAP_NR), "D" (UML_CONFIG_STUB_DATA), - "S" (UM_KERN_PAGE_SIZE), - "d" (PROT_READ | PROT_WRITE), - "g" (MAP_FIXED | MAP_SHARED), "g" (fd), + "movq %%rax, (%%rbx)": + : "a" (STUB_MMAP_NR), "D" (STUB_DATA), + "S" (UM_KERN_PAGE_SIZE), + "d" (PROT_READ | PROT_WRITE), + "g" (MAP_FIXED | MAP_SHARED), "g" (fd), "g" (offset), - "i" (&((struct stub_data *) UML_CONFIG_STUB_DATA)->err) + "i" (&((struct stub_data *) STUB_DATA)->err) : __syscall_clobber, "r10", "r8", "r9" ); } diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c index 7c77adecd91..8196450451c 100644 --- a/arch/um/kernel/exec.c +++ b/arch/um/kernel/exec.c @@ -11,6 +11,7 @@ #include "asm/current.h" #include "asm/processor.h" #include "asm/uaccess.h" +#include "as-layout.h" #include "mem_user.h" #include "skas.h" #include "os.h" @@ -18,7 +19,7 @@ void flush_thread(void) { void *data = NULL; - unsigned long end = proc_mm ? task_size : CONFIG_STUB_START; + unsigned long end = proc_mm ? task_size : STUB_START; int ret; arch_flush_thread(¤t->thread.arch); diff --git a/arch/um/kernel/skas/clone.c b/arch/um/kernel/skas/clone.c index 47b812b3bca..d119f4f7d89 100644 --- a/arch/um/kernel/skas/clone.c +++ b/arch/um/kernel/skas/clone.c @@ -4,6 +4,7 @@ #include <sys/time.h> #include <asm/unistd.h> #include <asm/page.h> +#include "as-layout.h" #include "ptrace_user.h" #include "skas.h" #include "stub-data.h" @@ -21,12 +22,11 @@ void __attribute__ ((__section__ (".__syscall_stub"))) stub_clone_handler(void) { - struct stub_data *data = (struct stub_data *) UML_CONFIG_STUB_DATA; + struct stub_data *data = (struct stub_data *) STUB_DATA; long err; err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD, - UML_CONFIG_STUB_DATA + UM_KERN_PAGE_SIZE / 2 - - sizeof(void *)); + STUB_DATA + UM_KERN_PAGE_SIZE / 2 - sizeof(void *)); if(err != 0) goto out; diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c index ae79888cf52..f859ec306cd 100644 --- a/arch/um/kernel/skas/mmu.c +++ b/arch/um/kernel/skas/mmu.c @@ -7,6 +7,7 @@ #include "linux/sched.h" #include "asm/pgalloc.h" #include "asm/pgtable.h" +#include "as-layout.h" #include "os.h" #include "skas.h" @@ -83,12 +84,12 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm) */ mm->pgd[USER_PTRS_PER_PGD] = __pgd(0); - ret = init_stub_pte(mm, CONFIG_STUB_CODE, + ret = init_stub_pte(mm, STUB_CODE, (unsigned long) &__syscall_stub_start); if (ret) goto out_free; - ret = init_stub_pte(mm, CONFIG_STUB_DATA, stack); + ret = init_stub_pte(mm, STUB_DATA, stack); if (ret) goto out_free; diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c index 0297e63f972..fce389c2342 100644 --- a/arch/um/kernel/skas/process.c +++ b/arch/um/kernel/skas/process.c @@ -18,7 +18,7 @@ int new_mm(unsigned long stack) return fd; if (skas_needs_stub) - map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack); + map_stub_pages(fd, STUB_CODE, STUB_DATA, stack); return fd; } diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c index 942f20ea888..f4a0e407eee 100644 --- a/arch/um/kernel/tlb.c +++ b/arch/um/kernel/tlb.c @@ -485,8 +485,8 @@ void __flush_tlb_one(unsigned long addr) static void fix_range(struct mm_struct *mm, unsigned long start_addr, unsigned long end_addr, int force) { - if (!proc_mm && (end_addr > CONFIG_STUB_START)) - end_addr = CONFIG_STUB_START; + if (!proc_mm && (end_addr > STUB_START)) + end_addr = STUB_START; fix_range_common(mm, start_addr, end_addr, force); } @@ -510,7 +510,7 @@ void flush_tlb_mm(struct mm_struct *mm) if (atomic_read(&mm->mm_users) == 0) return; - end = proc_mm ? task_size : CONFIG_STUB_START; + end = proc_mm ? task_size : STUB_START; fix_range(mm, 0, end, 0); } diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index 1993e5e1225..f1c71393f57 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -242,7 +242,8 @@ static unsigned long set_task_sizes_skas(unsigned long *task_size_out) if (!skas_needs_stub) *task_size_out = host_task_size; - else *task_size_out = CONFIG_STUB_START & PGDIR_MASK; + else + *task_size_out = STUB_START & PGDIR_MASK; return host_task_size; } diff --git a/arch/um/os-Linux/skas/mem.c b/arch/um/os-Linux/skas/mem.c index d58d11179bb..484e68f9f7a 100644 --- a/arch/um/os-Linux/skas/mem.c +++ b/arch/um/os-Linux/skas/mem.c @@ -10,6 +10,7 @@ #include <sys/mman.h> #include "init.h" #include "kern_constants.h" +#include "as-layout.h" #include "mm_id.h" #include "os.h" #include "proc_mm.h" @@ -40,7 +41,7 @@ static unsigned long syscall_regs[MAX_REG_NR]; static int __init init_syscall_regs(void) { get_safe_registers(syscall_regs); - syscall_regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE + + syscall_regs[REGS_IP_INDEX] = STUB_CODE + ((unsigned long) &batch_syscall_stub - (unsigned long) &__syscall_stub_start); return 0; @@ -93,8 +94,7 @@ static inline long do_syscall_stub(struct mm_id * mm_idp, void **addr) ret = *((unsigned long *) mm_idp->stack); offset = *((unsigned long *) mm_idp->stack + 1); if (offset) { - data = (unsigned long *)(mm_idp->stack + - offset - UML_CONFIG_STUB_DATA); + data = (unsigned long *)(mm_idp->stack + offset - STUB_DATA); printk(UM_KERN_ERR "do_syscall_stub : ret = %ld, offset = %ld, " "data = %p\n", ret, offset, data); syscall = (unsigned long *)((unsigned long)data + data[0]); @@ -182,7 +182,7 @@ long syscall_stub_data(struct mm_id * mm_idp, memcpy(stack + 1, data, data_count * sizeof(long)); *stub_addr = (void *)(((unsigned long)(stack + 1) & - ~UM_KERN_PAGE_MASK) + UML_CONFIG_STUB_DATA); + ~UM_KERN_PAGE_MASK) + STUB_DATA); return 0; } diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index 8548f126d62..e60d6e6c5a5 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -191,22 +191,23 @@ static int userspace_tramp(void *stack) int fd; unsigned long long offset; fd = phys_mapping(to_phys(&__syscall_stub_start), &offset); - addr = mmap64((void *) UML_CONFIG_STUB_CODE, UM_KERN_PAGE_SIZE, + addr = mmap64((void *) STUB_CODE, UM_KERN_PAGE_SIZE, PROT_EXEC, MAP_FIXED | MAP_PRIVATE, fd, offset); if (addr == MAP_FAILED) { - printk(UM_KERN_ERR "mapping mmap stub failed, " - "errno = %d\n", errno); + printk(UM_KERN_ERR "mapping mmap stub at 0x%lx failed, " + "errno = %d\n", STUB_CODE, errno); exit(1); } if (stack != NULL) { fd = phys_mapping(to_phys(stack), &offset); - addr = mmap((void *) UML_CONFIG_STUB_DATA, + addr = mmap((void *) STUB_DATA, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, fd, offset); if (addr == MAP_FAILED) { printk(UM_KERN_ERR "mapping segfault stack " - "failed, errno = %d\n", errno); + "at 0x%lx failed, errno = %d\n", + STUB_DATA, errno); exit(1); } } @@ -214,11 +215,11 @@ static int userspace_tramp(void *stack) if (!ptrace_faultinfo && (stack != NULL)) { struct sigaction sa; - unsigned long v = UML_CONFIG_STUB_CODE + + unsigned long v = STUB_CODE + (unsigned long) stub_segv_handler - (unsigned long) &__syscall_stub_start; - set_sigstack((void *) UML_CONFIG_STUB_DATA, UM_KERN_PAGE_SIZE); + set_sigstack((void *) STUB_DATA, UM_KERN_PAGE_SIZE); sigemptyset(&sa.sa_mask); sigaddset(&sa.sa_mask, SIGIO); sigaddset(&sa.sa_mask, SIGWINCH); @@ -382,10 +383,10 @@ static int __init init_thread_regs(void) { get_safe_registers(thread_regs); /* Set parent's instruction pointer to start of clone-stub */ - thread_regs[REGS_IP_INDEX] = UML_CONFIG_STUB_CODE + + thread_regs[REGS_IP_INDEX] = STUB_CODE + (unsigned long) stub_clone_handler - (unsigned long) &__syscall_stub_start; - thread_regs[REGS_SP_INDEX] = UML_CONFIG_STUB_DATA + UM_KERN_PAGE_SIZE - + thread_regs[REGS_SP_INDEX] = STUB_DATA + UM_KERN_PAGE_SIZE - sizeof(void *); #ifdef __SIGNAL_FRAMESIZE thread_regs[REGS_SP_INDEX] -= __SIGNAL_FRAMESIZE; @@ -443,7 +444,7 @@ int copy_context_skas0(unsigned long new_stack, int pid) * child's stack and check it. */ wait_stub_done(pid); - if (child_data->err != UML_CONFIG_STUB_DATA) + if (child_data->err != STUB_DATA) panic("copy_context_skas0 - stub-child reports error %ld\n", child_data->err); diff --git a/arch/um/sys-i386/stub.S b/arch/um/sys-i386/stub.S index 6a70d9ab5c2..e730772c401 100644 --- a/arch/um/sys-i386/stub.S +++ b/arch/um/sys-i386/stub.S @@ -1,4 +1,5 @@ #include "uml-config.h" +#include "as-layout.h" .globl syscall_stub .section .__syscall_stub, "x" @@ -6,7 +7,7 @@ .globl batch_syscall_stub batch_syscall_stub: /* load pointer to first operation */ - mov $(UML_CONFIG_STUB_DATA+8), %esp + mov $(ASM_STUB_DATA+8), %esp again: /* load length of additional data */ @@ -14,12 +15,12 @@ again: /* if(length == 0) : end of list */ /* write possible 0 to header */ - mov %eax, UML_CONFIG_STUB_DATA+4 + mov %eax, ASM_STUB_DATA+4 cmpl $0, %eax jz done /* save current pointer */ - mov %esp, UML_CONFIG_STUB_DATA+4 + mov %esp, ASM_STUB_DATA+4 /* skip additional data */ add %eax, %esp @@ -45,7 +46,7 @@ again: done: /* save return value */ - mov %eax, UML_CONFIG_STUB_DATA + mov %eax, ASM_STUB_DATA /* stop */ int3 diff --git a/arch/um/sys-i386/stub_segv.c b/arch/um/sys-i386/stub_segv.c index 2355dc19c46..b3999cb76bf 100644 --- a/arch/um/sys-i386/stub_segv.c +++ b/arch/um/sys-i386/stub_segv.c @@ -6,6 +6,7 @@ #include <signal.h> #include <sys/select.h> /* The only way I can see to get sigset_t */ #include <asm/unistd.h> +#include "as-layout.h" #include "uml-config.h" #include "sysdep/stub.h" #include "sysdep/sigcontext.h" @@ -17,8 +18,7 @@ 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); + GET_FAULTINFO_FROM_SC(*((struct faultinfo *) STUB_DATA), sc); pid = stub_syscall0(__NR_getpid); stub_syscall2(__NR_kill, pid, SIGUSR1); diff --git a/arch/um/sys-x86_64/stub.S b/arch/um/sys-x86_64/stub.S index 03c27973578..4afe204a6af 100644 --- a/arch/um/sys-x86_64/stub.S +++ b/arch/um/sys-x86_64/stub.S @@ -1,4 +1,5 @@ #include "uml-config.h" +#include "as-layout.h" .globl syscall_stub .section .__syscall_stub, "x" @@ -7,18 +8,18 @@ syscall_stub: /* We don't have 64-bit constants, so this constructs the address * we need. */ - movq $(UML_CONFIG_STUB_DATA >> 32), %rbx + movq $(ASM_STUB_DATA >> 32), %rbx salq $32, %rbx - movq $(UML_CONFIG_STUB_DATA & 0xffffffff), %rcx + movq $(ASM_STUB_DATA & 0xffffffff), %rcx or %rcx, %rbx movq %rax, (%rbx) int3 .globl batch_syscall_stub batch_syscall_stub: - mov $(UML_CONFIG_STUB_DATA >> 32), %rbx + mov $(ASM_STUB_DATA >> 32), %rbx sal $32, %rbx - mov $(UML_CONFIG_STUB_DATA & 0xffffffff), %rax + mov $(ASM_STUB_DATA & 0xffffffff), %rax or %rax, %rbx /* load pointer to first operation */ mov %rbx, %rsp diff --git a/arch/um/sys-x86_64/stub_segv.c b/arch/um/sys-x86_64/stub_segv.c index 652fa34c2cd..3afb590f007 100644 --- a/arch/um/sys-x86_64/stub_segv.c +++ b/arch/um/sys-x86_64/stub_segv.c @@ -6,6 +6,7 @@ #include <stddef.h> #include <signal.h> #include <asm/unistd.h> +#include "as-layout.h" #include "uml-config.h" #include "sysdep/sigcontext.h" #include "sysdep/faultinfo.h" @@ -33,7 +34,7 @@ stub_segv_handler(int sig) int pid; __asm__ __volatile__("movq %%rdx, %0" : "=g" (uc) :); - GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA), + GET_FAULTINFO_FROM_SC(*((struct faultinfo *) STUB_DATA), &uc->uc_mcontext); pid = stub_syscall0(__NR_getpid); |