diff --git a/ChangeLog.arm b/ChangeLog.arm index 9db4a3499e..4c1207ace1 100644 --- a/ChangeLog.arm +++ b/ChangeLog.arm @@ -1,3 +1,10 @@ +2011-04-26 Richard Sandiford + + * sysdeps/arm/dl-machine.h (elf_machine_rel): Handle STT_GNU_IFUNC + and R_ARM_IRELATIVE. + (elf_machine_rela): Likewise. + * sysdeps/arm/dl-irel.h: New file. + 2011-04-11 Joseph Myers * sysdeps/arm/dl-tls.h (TLS_DTV_UNALLOCATED): Define. diff --git a/sysdeps/arm/dl-irel.h b/sysdeps/arm/dl-irel.h new file mode 100644 index 0000000000..735e0a3ad6 --- /dev/null +++ b/sysdeps/arm/dl-irel.h @@ -0,0 +1,45 @@ +/* Machine-dependent ELF indirect relocation inline functions. + ARM version. + Copyright (C) 2009, 2010 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _DL_IREL_H +#define _DL_IREL_H + +#include +#include + +#define ELF_MACHINE_IREL 1 + +static inline void +__attribute ((always_inline)) +elf_irel (const Elf32_Rel *reloc) +{ + Elf32_Addr *const reloc_addr = (void *) reloc->r_offset; + const unsigned long int r_type = ELF32_R_TYPE (reloc->r_info); + + if (__builtin_expect (r_type == R_ARM_IRELATIVE, 1)) + { + Elf32_Addr value = ((Elf32_Addr (*) (void)) (*reloc_addr)) (); + *reloc_addr = value; + } + else + __libc_fatal ("unexpected reloc type in static binary"); +} + +#endif /* dl-irel.h */ diff --git a/sysdeps/arm/dl-machine.h b/sysdeps/arm/dl-machine.h index 9929f76c3e..b5d477be61 100644 --- a/sysdeps/arm/dl-machine.h +++ b/sysdeps/arm/dl-machine.h @@ -374,6 +374,12 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc, struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type); Elf32_Addr value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value; + if (sym != NULL + && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, + 0) + && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)) + value = ((Elf32_Addr (*) (void)) value) (); + switch (r_type) { case R_ARM_COPY: @@ -487,7 +493,8 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc, *reloc_addr = value; } break; -#if defined USE_TLS && !defined RTLD_BOOTSTRAP +#if !defined RTLD_BOOTSTRAP +#if defined USE_TLS case R_ARM_TLS_DTPMOD32: /* Get the information from the link map returned by the resolv function. */ @@ -507,6 +514,12 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc, *reloc_addr += sym->st_value + sym_map->l_tls_offset; } break; +#endif + case R_ARM_IRELATIVE: + value = map->l_addr + *reloc_addr; + value = ((Elf32_Addr (*) (void)) value) (); + *reloc_addr = value; + break; #endif default: _dl_reloc_bad_type (map, r_type, 0); @@ -537,6 +550,12 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc, struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type); Elf32_Addr value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value; + if (sym != NULL + && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, + 0) + && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)) + value = ((Elf32_Addr (*) (void)) value) (); + switch (r_type) { # ifndef RESOLVE_CONFLICT_FIND_MAP @@ -588,7 +607,8 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc, *reloc_addr = value; } break; -#if defined USE_TLS && !defined RTLD_BOOTSTRAP +#if !defined RTLD_BOOTSTRAP +#if defined USE_TLS case R_ARM_TLS_DTPMOD32: /* Get the information from the link map returned by the resolv function. */ @@ -608,6 +628,12 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc, + reloc->r_addend); } break; +#endif + case R_ARM_IRELATIVE: + value = map->l_addr + *reloc_addr; + value = ((Elf32_Addr (*) (void)) value) (); + *reloc_addr = value; + break; #endif default: _dl_reloc_bad_type (map, r_type, 0);