1 files changed, 124 insertions, 88 deletions

diff --git a/include/asm-x86/elf.h b/include/asm-x86/elf.h
index ec42a4d2e83b..d9c94e707289 100644
--- a/include/asm-x86/elf.h
+++ b/include/asm-x86/elf.h
@@ -73,18 +73,23 @@ typedef struct user_fxsr_struct elf_fpxregset_t;
 #endif
 
 #ifdef __KERNEL__
+#include <asm/vdso.h>
 
-#ifdef CONFIG_X86_32
-#include <asm/processor.h>
-#include <asm/system.h>         /* for savesegment */
-#include <asm/desc.h>
+extern unsigned int vdso_enabled;
 
 /*
  * This is used to ensure we don't load something for the wrong architecture.
  */
-#define elf_check_arch(x) \
+#define elf_check_arch_ia32(x) \
         (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
 
+#ifdef CONFIG_X86_32
+#include <asm/processor.h>
+#include <asm/system.h>         /* for savesegment */
+#include <asm/desc.h>
+
+#define elf_check_arch(x)       elf_check_arch_ia32(x)
+
 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
    contains a pointer to a function which might be registered using `atexit'.
    This provides a mean for the dynamic linker to call DT_FINI functions for
@@ -96,36 +101,38 @@ typedef struct user_fxsr_struct elf_fpxregset_t;
    just to make things more deterministic.
  */
 #define ELF_PLAT_INIT(_r, load_addr)    do { \
-        _r->ebx = 0; _r->ecx = 0; _r->edx = 0; \
-        _r->esi = 0; _r->edi = 0; _r->ebp = 0; \
-        _r->eax = 0; \
+        _r->bx = 0; _r->cx = 0; _r->dx = 0; \
+        _r->si = 0; _r->di = 0; _r->bp = 0; \
+        _r->ax = 0; \
 } while (0)
 
-/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
-   now struct_user_regs, they are different) */
-
-#define ELF_CORE_COPY_REGS(pr_reg, regs)                \
-        pr_reg[0] = regs->ebx;                          \
-        pr_reg[1] = regs->ecx;                          \
-        pr_reg[2] = regs->edx;                          \
-        pr_reg[3] = regs->esi;                          \
-        pr_reg[4] = regs->edi;                          \
-        pr_reg[5] = regs->ebp;                          \
-        pr_reg[6] = regs->eax;                          \
-        pr_reg[7] = regs->xds & 0xffff;                 \
-        pr_reg[8] = regs->xes & 0xffff;                 \
-        pr_reg[9] = regs->xfs & 0xffff;                 \
-        savesegment(gs,pr_reg[10]);                     \
-        pr_reg[11] = regs->orig_eax;                    \
-        pr_reg[12] = regs->eip;                         \
-        pr_reg[13] = regs->xcs & 0xffff;                \
-        pr_reg[14] = regs->eflags;                      \
-        pr_reg[15] = regs->esp;                         \
-        pr_reg[16] = regs->xss & 0xffff;
+/*
+ * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
+ * now struct_user_regs, they are different)
+ */
+
+#define ELF_CORE_COPY_REGS(pr_reg, regs) do {           \
+        pr_reg[0] = regs->bx;                           \
+        pr_reg[1] = regs->cx;                           \
+        pr_reg[2] = regs->dx;                           \
+        pr_reg[3] = regs->si;                           \
+        pr_reg[4] = regs->di;                           \
+        pr_reg[5] = regs->bp;                           \
+        pr_reg[6] = regs->ax;                           \
+        pr_reg[7] = regs->ds & 0xffff;                  \
+        pr_reg[8] = regs->es & 0xffff;                  \
+        pr_reg[9] = regs->fs & 0xffff;                  \
+        savesegment(gs, pr_reg[10]);                    \
+        pr_reg[11] = regs->orig_ax;                     \
+        pr_reg[12] = regs->ip;                          \
+        pr_reg[13] = regs->cs & 0xffff;                 \
+        pr_reg[14] = regs->flags;                       \
+        pr_reg[15] = regs->sp;                          \
+        pr_reg[16] = regs->ss & 0xffff;                 \
+} while (0);
 
 #define ELF_PLATFORM    (utsname()->machine)
 #define set_personality_64bit() do { } while (0)
-extern unsigned int vdso_enabled;
 
 #else /* CONFIG_X86_32 */
 
@@ -137,28 +144,57 @@ extern unsigned int vdso_enabled;
 #define elf_check_arch(x) \
         ((x)->e_machine == EM_X86_64)
 
+#define compat_elf_check_arch(x)        elf_check_arch_ia32(x)
+
+static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
+{
+        asm volatile("movl %0,%%fs" :: "r" (0));
+        asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS));
+        load_gs_index(0);
+        regs->ip = ip;
+        regs->sp = sp;
+        regs->flags = X86_EFLAGS_IF;
+        regs->cs = __USER32_CS;
+        regs->ss = __USER32_DS;
+}
+
+static inline void elf_common_init(struct thread_struct *t,
+                                   struct pt_regs *regs, const u16 ds)
+{
+        regs->ax = regs->bx = regs->cx = regs->dx = 0;
+        regs->si = regs->di = regs->bp = 0;
+        regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
+        regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
+        t->fs = t->gs = 0;
+        t->fsindex = t->gsindex = 0;
+        t->ds = t->es = ds;
+}
+
 #define ELF_PLAT_INIT(_r, load_addr)    do {              \
-        struct task_struct *cur = current;                \
-        (_r)->rbx = 0; (_r)->rcx = 0; (_r)->rdx = 0;      \
-        (_r)->rsi = 0; (_r)->rdi = 0; (_r)->rbp = 0;      \
-        (_r)->rax = 0;                                    \
-        (_r)->r8 = 0;                                     \
-        (_r)->r9 = 0;                                     \
-        (_r)->r10 = 0;                                    \
-        (_r)->r11 = 0;                                    \
-        (_r)->r12 = 0;                                    \
-        (_r)->r13 = 0;                                    \
-        (_r)->r14 = 0;                                    \
-        (_r)->r15 = 0;                                    \
-        cur->thread.fs = 0; cur->thread.gs = 0;           \
-        cur->thread.fsindex = 0; cur->thread.gsindex = 0; \
-        cur->thread.ds = 0; cur->thread.es = 0;           \
+        elf_common_init(&current->thread, _r, 0);         \
         clear_thread_flag(TIF_IA32);                      \
 } while (0)
 
-/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
-   now struct_user_regs, they are different). Assumes current is the process
-   getting dumped. */
+#define COMPAT_ELF_PLAT_INIT(regs, load_addr)   \
+        elf_common_init(&current->thread, regs, __USER_DS)
+#define compat_start_thread(regs, ip, sp)       do {            \
+                start_ia32_thread(regs, ip, sp);                \
+                set_fs(USER_DS);                                \
+        } while (0)
+#define COMPAT_SET_PERSONALITY(ex, ibcs2)       do {            \
+                if (test_thread_flag(TIF_IA32))                 \
+                        clear_thread_flag(TIF_ABI_PENDING);     \
+                else                                            \
+                        set_thread_flag(TIF_ABI_PENDING);       \
+                current->personality |= force_personality32;    \
+        } while (0)
+#define COMPAT_ELF_PLATFORM                     ("i686")
+
+/*
+ * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
+ * now struct_user_regs, they are different). Assumes current is the process
+ * getting dumped.
+ */
 
 #define ELF_CORE_COPY_REGS(pr_reg, regs)  do {                  \
         unsigned v;                                             \
@@ -166,22 +202,22 @@ extern unsigned int vdso_enabled;
         (pr_reg)[1] = (regs)->r14;                              \
         (pr_reg)[2] = (regs)->r13;                              \
         (pr_reg)[3] = (regs)->r12;                              \
-        (pr_reg)[4] = (regs)->rbp;                              \
-        (pr_reg)[5] = (regs)->rbx;                              \
+        (pr_reg)[4] = (regs)->bp;                               \
+        (pr_reg)[5] = (regs)->bx;                               \
         (pr_reg)[6] = (regs)->r11;                              \
         (pr_reg)[7] = (regs)->r10;                              \
         (pr_reg)[8] = (regs)->r9;                               \
         (pr_reg)[9] = (regs)->r8;                               \
-        (pr_reg)[10] = (regs)->rax;                             \
-        (pr_reg)[11] = (regs)->rcx;                             \
-        (pr_reg)[12] = (regs)->rdx;                             \
-        (pr_reg)[13] = (regs)->rsi;                             \
-        (pr_reg)[14] = (regs)->rdi;                             \
-        (pr_reg)[15] = (regs)->orig_rax;                        \
-        (pr_reg)[16] = (regs)->rip;                             \
+        (pr_reg)[10] = (regs)->ax;                              \
+        (pr_reg)[11] = (regs)->cx;                              \
+        (pr_reg)[12] = (regs)->dx;                              \
+        (pr_reg)[13] = (regs)->si;                              \
+        (pr_reg)[14] = (regs)->di;                              \
+        (pr_reg)[15] = (regs)->orig_ax;                         \
+        (pr_reg)[16] = (regs)->ip;                              \
         (pr_reg)[17] = (regs)->cs;                              \
-        (pr_reg)[18] = (regs)->eflags;                          \
-        (pr_reg)[19] = (regs)->rsp;                             \
+        (pr_reg)[18] = (regs)->flags;                           \
+        (pr_reg)[19] = (regs)->sp;                              \
         (pr_reg)[20] = (regs)->ss;                              \
         (pr_reg)[21] = current->thread.fs;                      \
         (pr_reg)[22] = current->thread.gs;                      \
@@ -189,15 +225,17 @@ extern unsigned int vdso_enabled;
         asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v;       \
         asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v;       \
         asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v;       \
-} while(0);
+} while (0);
 
 /* I'm not sure if we can use '-' here */
 #define ELF_PLATFORM       ("x86_64")
 extern void set_personality_64bit(void);
-extern int vdso_enabled;
+extern unsigned int sysctl_vsyscall32;
+extern int force_personality32;
 
 #endif /* !CONFIG_X86_32 */
 
+#define CORE_DUMP_USE_REGSET
 #define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE       4096
 
@@ -232,43 +270,24 @@ extern int vdso_enabled;
 
 struct task_struct;
 
-extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
-extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
-
-#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
-#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
+#define ARCH_DLINFO_IA32(vdso_enabled) \
+do if (vdso_enabled) {                                                  \
+                NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY);                    \
+                NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE);        \
+} while (0)
 
 #ifdef CONFIG_X86_32
-extern int dump_task_extended_fpu (struct task_struct *,
-                                   struct user_fxsr_struct *);
-#define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) \
-        dump_task_extended_fpu(tsk, elf_xfpregs)
-#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
 
 #define VDSO_HIGH_BASE          (__fix_to_virt(FIX_VDSO))
-#define VDSO_CURRENT_BASE       ((unsigned long)current->mm->context.vdso)
-#define VDSO_PRELINK            0
-
-#define VDSO_SYM(x) \
-                (VDSO_CURRENT_BASE + (unsigned long)(x) - VDSO_PRELINK)
-
-#define VDSO_HIGH_EHDR          ((const struct elfhdr *) VDSO_HIGH_BASE)
-#define VDSO_EHDR               ((const struct elfhdr *) VDSO_CURRENT_BASE)
 
-extern void __kernel_vsyscall;
-
-#define VDSO_ENTRY              VDSO_SYM(&__kernel_vsyscall)
+#define ARCH_DLINFO             ARCH_DLINFO_IA32(vdso_enabled)
 
 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
 
-#define ARCH_DLINFO \
-do if (vdso_enabled) {                                                  \
-                NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY);                    \
-                NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE);        \
-} while (0)
-
 #else /* CONFIG_X86_32 */
 
+#define VDSO_HIGH_BASE          0xffffe000U /* CONFIG_COMPAT_VDSO address */
+
 /* 1GB for 64bit, 8MB for 32bit */
 #define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
 
@@ -277,14 +296,31 @@ do if (vdso_enabled) {						\
         NEW_AUX_ENT(AT_SYSINFO_EHDR,(unsigned long)current->mm->context.vdso);\
 } while (0)
 
+#define AT_SYSINFO              32
+
+#define COMPAT_ARCH_DLINFO      ARCH_DLINFO_IA32(sysctl_vsyscall32)
+
+#define COMPAT_ELF_ET_DYN_BASE  (TASK_UNMAPPED_BASE + 0x1000000)
+
 #endif /* !CONFIG_X86_32 */
 
+#define VDSO_CURRENT_BASE       ((unsigned long)current->mm->context.vdso)
+
+#define VDSO_ENTRY \
+        ((unsigned long) VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
+
 struct linux_binprm;
 
 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
                                        int executable_stack);
 
+extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
+#define compat_arch_setup_additional_pages      syscall32_setup_pages
+
+extern unsigned long arch_randomize_brk(struct mm_struct *mm);
+#define arch_randomize_brk arch_randomize_brk
+
 #endif /* __KERNEL__ */
 
 #endif