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Diffstat (limited to 'include/asm-x86/elf.h')
-rw-r--r--include/asm-x86/elf.h212
1 files changed, 124 insertions, 88 deletions
diff --git a/include/asm-x86/elf.h b/include/asm-x86/elf.h
index ec42a4d2e83..d9c94e70728 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
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-10 06:55:32 +0000