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-rw-r--r--sysdeps/i386/dl-machine.h149
1 files changed, 28 insertions, 121 deletions
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index c48d9d325e..78c083f6ab 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -1,5 +1,5 @@
/* Machine-dependent ELF dynamic relocation inline functions. i386 version.
- Copyright (C) 1995-2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1995-2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -129,7 +129,8 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
{
got[2] = (Elf32_Addr) &_dl_runtime_profile;
- if (_dl_name_match_p (GLRO(dl_profile), l))
+ if (GLRO(dl_profile) != NULL
+ && _dl_name_match_p (GLRO(dl_profile), l))
/* This is the object we are looking for. Say that we really
want profiling and the timers are started. */
GL(dl_profile_map) = l;
@@ -154,112 +155,18 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
destroys the passed register information. */
/* GKM FIXME: Fix trampoline to pass bounds so we can do
without the `__unbounded' qualifier. */
-#define ARCH_FIXUP_ATTRIBUTE __attribute__ ((regparm (3), unused))
+#define ARCH_FIXUP_ATTRIBUTE __attribute__ ((regparm (3), stdcall, unused))
-static ElfW(Addr) fixup (struct link_map *__unbounded l,
- ElfW(Word) reloc_offset)
+extern ElfW(Addr) _dl_fixup (struct link_map *__unbounded l,
+ ElfW(Word) reloc_offset)
ARCH_FIXUP_ATTRIBUTE;
-static ElfW(Addr) profile_fixup (struct link_map *l, ElfW(Word) reloc_offset,
- ElfW(Addr) retaddr)
+extern ElfW(Addr) _dl_profile_fixup (struct link_map *l,
+ ElfW(Word) reloc_offset,
+ ElfW(Addr) retaddr, void *regs,
+ long int *framesizep)
ARCH_FIXUP_ATTRIBUTE;
# endif
-/* This code is used in dl-runtime.c to call the `fixup' function
- and then redirect to the address it returns. */
-# if !defined PROF && !__BOUNDED_POINTERS__
-# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\
- .text\n\
- .globl _dl_runtime_resolve\n\
- .type _dl_runtime_resolve, @function\n\
- " CFI_STARTPROC "\n\
- .align 16\n\
-_dl_runtime_resolve:\n\
- " CFI_ADJUST_CFA_OFFSET (8) "\n\
- pushl %eax # Preserve registers otherwise clobbered.\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %edx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- movl 16(%esp), %edx # Copy args pushed by PLT in register. Note\n\
- movl 12(%esp), %eax # that `fixup' takes its parameters in regs.\n\
- call fixup # Call resolver.\n\
- popl %edx # Get register content back.\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- xchgl %eax, (%esp) # Get %eax contents end store function address.\n\
- ret $8 # Jump to function address.\n\
- " CFI_ENDPROC "\n\
- .size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
-\n\
- .globl _dl_runtime_profile\n\
- .type _dl_runtime_profile, @function\n\
- " CFI_STARTPROC "\n\
- .align 16\n\
-_dl_runtime_profile:\n\
- " CFI_ADJUST_CFA_OFFSET (8) "\n\
- pushl %eax # Preserve registers otherwise clobbered.\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %edx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- movl 20(%esp), %ecx # Load return address\n\
- movl 16(%esp), %edx # Copy args pushed by PLT in register. Note\n\
- movl 12(%esp), %eax # that `fixup' takes its parameters in regs.\n\
- call profile_fixup # Call resolver.\n\
- popl %edx # Get register content back.\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- xchgl %eax, (%esp) # Get %eax contents end store function address.\n\
- ret $8 # Jump to function address.\n\
- " CFI_ENDPROC "\n\
- .size _dl_runtime_profile, .-_dl_runtime_profile\n\
- .previous\n\
-");
-# else
-# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\n\
- .text\n\
- .globl _dl_runtime_resolve\n\
- .globl _dl_runtime_profile\n\
- .type _dl_runtime_resolve, @function\n\
- .type _dl_runtime_profile, @function\n\
- " CFI_STARTPROC "\n\
- .align 16\n\
-_dl_runtime_resolve:\n\
-_dl_runtime_profile:\n\
- " CFI_ADJUST_CFA_OFFSET (8) "\n\
- pushl %eax # Preserve registers otherwise clobbered.\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %edx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- movl 16(%esp), %edx # Push the arguments for `fixup'\n\
- movl 12(%esp), %eax\n\
- pushl %edx\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- pushl %eax\n\
- " CFI_ADJUST_CFA_OFFSET (4) "\n\
- call fixup # Call resolver.\n\
- popl %edx # Pop the parameters\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %edx # Get register content back.\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- popl %ecx\n\
- " CFI_ADJUST_CFA_OFFSET (-4) "\n\
- xchgl %eax, (%esp) # Get %eax contents end store function address.\n\
- ret $8 # Jump to function address.\n\
- " CFI_ENDPROC "\n\
- .size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
- .size _dl_runtime_profile, .-_dl_runtime_profile\n\
- .previous\n\
-");
-# endif
#endif
/* Mask identifying addresses reserved for the user program,
@@ -308,11 +215,21 @@ _dl_start_user:\n\
movl _rtld_local@GOTOFF(%ebx), %eax\n\
leal 8(%esp,%edx,4), %esi\n\
leal 4(%esp), %ecx\n\
+ movl %esp, %ebp\n\
+ # Make sure _dl_init is run with 16 byte aligned stack.\n\
+ andl $-16, %esp\n\
+ pushl %eax\n\
+ pushl %eax\n\
+ pushl %ebp\n\
pushl %esi\n\
+ # Clear %ebp, so that even constructors have terminated backchain.\n\
+ xorl %ebp, %ebp\n\
# Call the function to run the initializers.\n\
call _dl_init_internal@PLT\n\
# Pass our finalizer function to the user in %edx, as per ELF ABI.\n\
leal _dl_fini@GOTOFF(%ebx), %edx\n\
+ # Restore %esp _start expects.\n\
+ movl (%esp), %esp\n\
# Jump to the user's entry point.\n\
jmp *%edi\n\
.previous\n\
@@ -375,9 +292,14 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc,
return value;
}
+
+/* Names of the architecture-specific auditing callback functions. */
+#define ARCH_LA_PLTENTER i86_gnu_pltenter
+#define ARCH_LA_PLTEXIT i86_gnu_pltexit
+
#endif /* !dl_machine_h */
-#ifdef RESOLVE
+#ifdef RESOLVE_MAP
/* The i386 never uses Elf32_Rela relocations for the dynamic linker.
Prelinked libraries may use Elf32_Rela though. */
@@ -422,17 +344,8 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc,
#endif /* !RTLD_BOOTSTRAP and have no -z combreloc */
{
const Elf32_Sym *const refsym = sym;
-#if defined USE_TLS && !defined RTLD_BOOTSTRAP
struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
- Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value;
-#else
- Elf32_Addr value = RESOLVE (&sym, version, r_type);
-
-# ifndef RTLD_BOOTSTRAP
- if (sym != NULL)
-# endif
- value += sym->st_value;
-#endif /* use TLS and !RTLD_BOOTSTRAP */
+ Elf32_Addr value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value;
switch (r_type)
{
@@ -549,14 +462,8 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
# ifndef RESOLVE_CONFLICT_FIND_MAP
const Elf32_Sym *const refsym = sym;
# endif
-# ifdef USE_TLS
struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value;
-# else
- Elf32_Addr value = RESOLVE (&sym, version, r_type);
- if (sym != NULL)
- value += sym->st_value;
-# endif
switch (ELF32_R_TYPE (reloc->r_info))
{
@@ -692,4 +599,4 @@ elf_machine_lazy_rela (struct link_map *map,
#endif /* !RTLD_BOOTSTRAP */
-#endif /* RESOLVE */
+#endif /* RESOLVE_MAP */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-28 11:40:20 +0000