Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 1 | /* Update RELA relocation information at given index. |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame^] | 2 | Copyright (C) 2000, 2001, 2002, 2005, 2009, 2014 Red Hat, Inc. |
| 3 | This file is part of elfutils. |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 4 | Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| 5 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame^] | 6 | This file is free software; you can redistribute it and/or modify |
| 7 | it under the terms of either |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 8 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame^] | 9 | * the GNU Lesser General Public License as published by the Free |
| 10 | Software Foundation; either version 3 of the License, or (at |
| 11 | your option) any later version |
| 12 | |
| 13 | or |
| 14 | |
| 15 | * the GNU General Public License as published by the Free |
| 16 | Software Foundation; either version 2 of the License, or (at |
| 17 | your option) any later version |
| 18 | |
| 19 | or both in parallel, as here. |
| 20 | |
| 21 | elfutils is distributed in the hope that it will be useful, but |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 22 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 24 | General Public License for more details. |
| 25 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame^] | 26 | You should have received copies of the GNU General Public License and |
| 27 | the GNU Lesser General Public License along with this program. If |
| 28 | not, see <http://www.gnu.org/licenses/>. */ |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 29 | |
| 30 | #ifdef HAVE_CONFIG_H |
| 31 | # include <config.h> |
| 32 | #endif |
| 33 | |
| 34 | #include <gelf.h> |
| 35 | #include <stdlib.h> |
| 36 | |
| 37 | #include "libelfP.h" |
| 38 | |
| 39 | |
| 40 | int |
| 41 | gelf_update_rela (Elf_Data *dst, int ndx, GElf_Rela *src) |
| 42 | { |
| 43 | Elf_Data_Scn *data_scn = (Elf_Data_Scn *) dst; |
| 44 | Elf_Scn *scn; |
| 45 | int result = 0; |
| 46 | |
| 47 | if (dst == NULL) |
| 48 | return 0; |
| 49 | |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 50 | if (unlikely (data_scn->d.d_type != ELF_T_RELA)) |
| 51 | { |
| 52 | /* The type of the data better should match. */ |
| 53 | __libelf_seterrno (ELF_E_DATA_MISMATCH); |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | scn = data_scn->s; |
| 58 | rwlock_wrlock (scn->elf->lock); |
| 59 | |
| 60 | if (scn->elf->class == ELFCLASS32) |
| 61 | { |
| 62 | Elf32_Rela *rel; |
| 63 | |
| 64 | /* There is the possibility that the values in the input are |
| 65 | too large. */ |
| 66 | if (unlikely (src->r_offset > 0xffffffffull) |
| 67 | || unlikely (GELF_R_SYM (src->r_info) > 0xffffff) |
| 68 | || unlikely (GELF_R_TYPE (src->r_info) > 0xff) |
| 69 | || unlikely (src->r_addend < -0x80000000ll) |
| 70 | || unlikely (src->r_addend > 0x7fffffffll)) |
| 71 | { |
| 72 | __libelf_seterrno (ELF_E_INVALID_DATA); |
| 73 | goto out; |
| 74 | } |
| 75 | |
| 76 | /* Check whether we have to resize the data buffer. */ |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame^] | 77 | if (INVALID_NDX (ndx, Elf32_Rela, &data_scn->d)) |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 78 | { |
| 79 | __libelf_seterrno (ELF_E_INVALID_INDEX); |
| 80 | goto out; |
| 81 | } |
| 82 | |
| 83 | rel = &((Elf32_Rela *) data_scn->d.d_buf)[ndx]; |
| 84 | |
| 85 | rel->r_offset = src->r_offset; |
| 86 | rel->r_info = ELF32_R_INFO (GELF_R_SYM (src->r_info), |
| 87 | GELF_R_TYPE (src->r_info)); |
| 88 | rel->r_addend = src->r_addend; |
| 89 | } |
| 90 | else |
| 91 | { |
| 92 | /* Check whether we have to resize the data buffer. */ |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame^] | 93 | if (INVALID_NDX (ndx, Elf64_Rela, &data_scn->d)) |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 94 | { |
| 95 | __libelf_seterrno (ELF_E_INVALID_INDEX); |
| 96 | goto out; |
| 97 | } |
| 98 | |
| 99 | ((Elf64_Rela *) data_scn->d.d_buf)[ndx] = *src; |
| 100 | } |
| 101 | |
| 102 | result = 1; |
| 103 | |
| 104 | /* Mark the section as modified. */ |
| 105 | scn->flags |= ELF_F_DIRTY; |
| 106 | |
| 107 | out: |
| 108 | rwlock_unlock (scn->elf->lock); |
| 109 | |
| 110 | return result; |
| 111 | } |