Petr Machata | 98c8a73 | 2013-11-26 03:10:31 +0100 | [diff] [blame] | 1 | /* AArch64 specific symbolic name handling. |
| 2 | Copyright (C) 2013 Red Hat, Inc. |
| 3 | This file is part of elfutils. |
| 4 | |
| 5 | This file is free software; you can redistribute it and/or modify |
| 6 | it under the terms of either |
| 7 | |
| 8 | * the GNU Lesser General Public License as published by the Free |
| 9 | Software Foundation; either version 3 of the License, or (at |
| 10 | your option) any later version |
| 11 | |
| 12 | or |
| 13 | |
| 14 | * the GNU General Public License as published by the Free |
| 15 | Software Foundation; either version 2 of the License, or (at |
| 16 | your option) any later version |
| 17 | |
| 18 | or both in parallel, as here. |
| 19 | |
| 20 | elfutils is distributed in the hope that it will be useful, but |
| 21 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 23 | General Public License for more details. |
| 24 | |
| 25 | You should have received copies of the GNU General Public License and |
| 26 | the GNU Lesser General Public License along with this program. If |
| 27 | not, see <http://www.gnu.org/licenses/>. */ |
| 28 | |
| 29 | #ifdef HAVE_CONFIG_H |
| 30 | # include <config.h> |
| 31 | #endif |
| 32 | |
| 33 | #include <elf.h> |
| 34 | #include <stddef.h> |
Mark Wielaard | c2ba078 | 2013-12-19 16:11:19 +0100 | [diff] [blame] | 35 | #include <string.h> |
Petr Machata | 98c8a73 | 2013-11-26 03:10:31 +0100 | [diff] [blame] | 36 | |
| 37 | #define BACKEND aarch64_ |
| 38 | #include "libebl_CPU.h" |
| 39 | |
| 40 | |
| 41 | /* Check for the simple reloc types. */ |
| 42 | Elf_Type |
| 43 | aarch64_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type) |
| 44 | { |
| 45 | switch (type) |
| 46 | { |
| 47 | case R_AARCH64_ABS64: |
| 48 | return ELF_T_XWORD; |
| 49 | case R_AARCH64_ABS32: |
| 50 | return ELF_T_WORD; |
| 51 | case R_AARCH64_ABS16: |
| 52 | return ELF_T_HALF; |
| 53 | |
| 54 | default: |
| 55 | return ELF_T_NUM; |
| 56 | } |
| 57 | } |
Mark Wielaard | c2ba078 | 2013-12-19 16:11:19 +0100 | [diff] [blame] | 58 | |
| 59 | /* If this is the _GLOBAL_OFFSET_TABLE_ symbol, then it should point to |
| 60 | .got[0] even if there is a .got.plt section. */ |
| 61 | bool |
| 62 | aarch64_check_special_symbol (Elf *elf, GElf_Ehdr *ehdr, const GElf_Sym *sym, |
| 63 | const char *name, const GElf_Shdr *destshdr) |
| 64 | { |
| 65 | if (name != NULL |
| 66 | && strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 67 | { |
| 68 | const char *sname = elf_strptr (elf, ehdr->e_shstrndx, destshdr->sh_name); |
| 69 | if (sname != NULL && strcmp (sname, ".got.plt") == 0) |
| 70 | { |
| 71 | Elf_Scn *scn = NULL; |
| 72 | while ((scn = elf_nextscn (elf, scn)) != NULL) |
| 73 | { |
| 74 | GElf_Shdr shdr_mem; |
| 75 | GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); |
Mark Wielaard | 0535e51 | 2014-01-14 22:14:23 +0100 | [diff] [blame] | 76 | if (shdr != NULL) |
| 77 | { |
| 78 | sname = elf_strptr (elf, ehdr->e_shstrndx, shdr->sh_name); |
| 79 | if (sname != NULL && strcmp (sname, ".got") == 0) |
| 80 | return sym->st_value == shdr->sh_addr; |
| 81 | } |
Mark Wielaard | c2ba078 | 2013-12-19 16:11:19 +0100 | [diff] [blame] | 82 | } |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | return false; |
| 87 | } |