diff options
Diffstat (limited to 'sysdeps/x86_64/dl-machine.h')
| -rw-r--r-- | sysdeps/x86_64/dl-machine.h | 136 |
1 files changed, 10 insertions, 126 deletions
diff --git a/sysdeps/x86_64/dl-machine.h b/sysdeps/x86_64/dl-machine.h index b932f51d15..18bff95dcd 100644 --- a/sysdeps/x86_64/dl-machine.h +++ b/sysdeps/x86_64/dl-machine.h @@ -116,7 +116,8 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile) { got[2] = (Elf64_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; @@ -130,128 +131,6 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile) return lazy; } -/* This code is used in dl-runtime.c to call the `fixup' function - and then redirect to the address it returns. */ -#ifndef PROF -# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\n\ - .text\n\ - .globl _dl_runtime_resolve\n\ - .type _dl_runtime_resolve, @function\n\ - .align 16\n\ - " CFI_STARTPROC "\n\ -_dl_runtime_resolve:\n\ - subq $56,%rsp\n\ - " CFI_ADJUST_CFA_OFFSET(72)" # Incorporate PLT\n\ - movq %rax,(%rsp) # Preserve registers otherwise clobbered.\n\ - movq %rcx,8(%rsp)\n\ - movq %rdx,16(%rsp)\n\ - movq %rsi,24(%rsp)\n\ - movq %rdi,32(%rsp)\n\ - movq %r8,40(%rsp)\n\ - movq %r9,48(%rsp)\n\ - movq 64(%rsp), %rsi # Copy args pushed by PLT in register.\n\ - movq %rsi,%r11 # Multiply by 24\n\ - addq %r11,%rsi\n\ - addq %r11,%rsi\n\ - shlq $3, %rsi\n\ - movq 56(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset\n\ - call fixup # Call resolver.\n\ - movq %rax, %r11 # Save return value\n\ - movq 48(%rsp),%r9 # Get register content back.\n\ - movq 40(%rsp),%r8\n\ - movq 32(%rsp),%rdi\n\ - movq 24(%rsp),%rsi\n\ - movq 16(%rsp),%rdx\n\ - movq 8(%rsp),%rcx\n\ - movq (%rsp),%rax\n\ - addq $72,%rsp # Adjust stack(PLT did 2 pushes)\n\ - " CFI_ADJUST_CFA_OFFSET(-72)" \n\ - jmp *%r11 # 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\ - .align 16\n\ - " CFI_STARTPROC "\n\ -_dl_runtime_profile:\n\ - subq $56,%rsp\n\ - " CFI_ADJUST_CFA_OFFSET(72)" # Incorporate PLT\n\ - movq %rax,(%rsp) # Preserve registers otherwise clobbered.\n\ - movq %rcx,8(%rsp)\n\ - movq %rdx,16(%rsp)\n\ - movq %rsi,24(%rsp)\n\ - movq %rdi,32(%rsp)\n\ - movq %r8,40(%rsp)\n\ - movq %r9,48(%rsp)\n\ - movq 72(%rsp), %rdx # Load return address if needed\n\ - movq 64(%rsp), %rsi # Copy args pushed by PLT in register.\n\ - movq %rsi,%r11 # Multiply by 24\n\ - addq %r11,%rsi\n\ - addq %r11,%rsi\n\ - shlq $3, %rsi\n\ - movq 56(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset\n\ - call profile_fixup # Call resolver.\n\ - movq %rax, %r11 # Save return value\n\ - movq 48(%rsp),%r9 # Get register content back.\n\ - movq 40(%rsp),%r8\n\ - movq 32(%rsp),%rdi\n\ - movq 24(%rsp),%rsi\n\ - movq 16(%rsp),%rdx\n\ - movq 8(%rsp),%rcx\n\ - movq (%rsp),%rax\n\ - addq $72,%rsp # Adjust stack\n\ - " CFI_ADJUST_CFA_OFFSET(-72)"\n\ - jmp *%r11 # 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\ - .align 16\n\ - " CFI_STARTPROC "\n\ -_dl_runtime_resolve:\n\ -_dl_runtime_profile:\n\ - subq $56,%rsp\n\ - " CFI_ADJUST_CFA_OFFSET(72)" # Incorporate PLT\n\ - movq %rax,(%rsp) # Preserve registers otherwise clobbered.\n\ - movq %rcx,8(%rsp)\n\ - movq %rdx,16(%rsp)\n\ - movq %rsi,24(%rsp)\n\ - movq %rdi,32(%rsp)\n\ - movq %r8,40(%rsp)\n\ - movq %r9,48(%rsp)\n\ - movq 64(%rsp), %rsi # Copy args pushed by PLT in register.\n\ - movq %rsi,%r11 # Multiply by 24\n\ - addq %r11,%rsi\n\ - addq %r11,%rsi\n\ - shlq $3, %rsi\n\ - movq 56(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset\n\ - call fixup # Call resolver.\n\ - movq %rax, %r11 # Save return value\n\ - movq 48(%rsp),%r9 # Get register content back.\n\ - movq 40(%rsp),%r8\n\ - movq 32(%rsp),%rdi\n\ - movq 24(%rsp),%rsi\n\ - movq 16(%rsp),%rdx\n\ - movq 8(%rsp),%rcx\n\ - movq (%rsp),%rax\n\ - addq $72,%rsp # Adjust stack\n\ - " CFI_ADJUST_CFA_OFFSET(-72)"\n\ - jmp *%r11 # 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 - /* Initial entry point code for the dynamic linker. The C function `_dl_start' is the real entry point; its return value is the user program's entry point. */ @@ -348,9 +227,14 @@ elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc, return value; } + +/* Names of the architecture-specific auditing callback functions. */ +#define ARCH_LA_PLTENTER x86_64_gnu_pltenter +#define ARCH_LA_PLTEXIT x86_64_gnu_pltexit + #endif /* !dl_machine_h */ -#ifdef RESOLVE +#ifdef RESOLVE_MAP /* Perform the relocation specified by RELOC and SYM (which is fully resolved). MAP is the object containing the reloc. */ @@ -390,7 +274,7 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc, #ifndef RTLD_BOOTSTRAP const Elf64_Sym *const refsym = sym; #endif -#if defined USE_TLS && !defined RTLD_BOOTSTRAP +#ifndef RTLD_BOOTSTRAP struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type); Elf64_Addr value = (sym == NULL ? 0 : (Elf64_Addr) sym_map->l_addr + sym->st_value); @@ -553,4 +437,4 @@ elf_machine_lazy_rel (struct link_map *map, _dl_reloc_bad_type (map, r_type, 1); } -#endif /* RESOLVE */ +#endif /* RESOLVE_MAP */ |