diff options
Diffstat (limited to 'sysdeps/i386/dl-machine.h')
| -rw-r--r-- | sysdeps/i386/dl-machine.h | 43 |
1 files changed, 35 insertions, 8 deletions
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h index 1797ae5b87..f387a887c1 100644 --- a/sysdeps/i386/dl-machine.h +++ b/sysdeps/i386/dl-machine.h @@ -75,7 +75,7 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc, Elf32_Addr sym_loadaddr, const Elf32_Sym *sym) { - Elf32_Addr *const reloc_addr = (Elf32_Addr *) reloc->r_offset; + Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset); const Elf32_Addr sym_value = sym_loadaddr + sym->st_value; switch (ELF32_R_TYPE (reloc->r_info)) @@ -102,6 +102,20 @@ elf_machine_rel (struct link_map *map, } } +static inline void +elf_machine_lazy_rel (struct link_map *map, const Elf32_Rel *reloc) +{ + Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset); + switch (ELF32_R_TYPE (reloc->r_info)) + { + case R_386_JMP_SLOT: + *reloc_addr += map->l_addr; + break; + default: + assert (! "unexpected PLT reloc type"); + break; + } +} /* The i386 never uses Elf32_Rela relocations. */ #define ELF_MACHINE_NO_RELA 1 @@ -113,12 +127,14 @@ elf_machine_rel (struct link_map *map, static inline void elf_machine_runtime_setup (struct link_map *l) { + Elf32_Addr *got; extern void _dl_runtime_resolve (Elf32_Word); + /* The GOT entries for functions in the PLT have not yet been filled in. Their initial contents will arrange when called to push an offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1], and then jump to _GLOBAL_OFFSET_TABLE[2]. */ - Elf32_Addr *got = (Elf32_Addr *) l->l_info[DT_PLTGOT]->d_un.d_ptr; + got = (Elf32_Addr *) (l->l_addr + l->l_info[DT_PLTGOT]->d_un.d_ptr); got[1] = (Elf32_Addr) l; /* Identify this shared object. */ /* This function will get called to fix up the GOT entry indicated by the offset on the stack, and then jump to the resolved address. */ @@ -140,9 +156,20 @@ _dl_start_user:\n\ # Save the user entry point address in %edi.\n\ movl %eax, %edi\n\ # Point %ebx at the GOT. -1: call 2f\n\ -2: popl %ebx\n\ - addl $_GLOBAL_OFFSET_TABLE_+[.-2b], %ebx\n\ + call 0f\n\ +0: popl %ebx\n\ + addl $_GLOBAL_OFFSET_TABLE_+[.-0b], %ebx\n\ + # See if we were run as a command with the executable file\n\ + # name as an extra leading argument.\n\ + movl rtld_command@GOT(%ebx), %eax\n\ + movl (%eax),%eax\n\ + testl %eax,%eax\n\ + jz 0f\n\ + # Pop the original argument count, decrement it, and replace\n\ + # the original first argument pointer with the new count.\n\ + popl %eax\n\ + decl %eax\n\ + movl %eax,(%esp)\n\ # Call _dl_init_next to return the address of an initializer\n\ # function to run.\n\ 0: call _dl_init_next@PLT\n\ @@ -150,7 +177,7 @@ _dl_start_user:\n\ testl %eax,%eax\n\ jz 1f\n\ # Call the shared object initializer function.\n\ - # NOTE: We depend only on the registers (%ebx)\n\ + # NOTE: We depend only on the registers (%ebx and %edi)\n\ # and the return address pushed by this call;\n\ # the initializer is called with the stack just\n\ # as it appears on entry, and it is free to move\n\ @@ -159,8 +186,8 @@ _dl_start_user:\n\ call *%eax\n\ # Loop to call _dl_init_next for the next initializer.\n\ jmp 0b\n\ - # Pass our finalizer function to the user in %edx, as per ELF ABI.\n\ - leal _dl_fini@GOT(%ebx), %edx\n\ +1: # Pass our finalizer function to the user in %edx, as per ELF ABI.\n\ + movl _dl_fini@GOT(%ebx), %edx\n\ # Jump to the user's entry point.\n\ jmp *%edi\n\ "); |