The Android Open Source Project | 593c365 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1 | /* Update information in dynamic table at the given index. |
| 2 | Copyright (C) 2000, 2001, 2002 Red Hat, Inc. |
| 3 | Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation, version 2. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software Foundation, |
| 16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 17 | |
| 18 | #ifdef HAVE_CONFIG_H |
| 19 | # include <config.h> |
| 20 | #endif |
| 21 | |
| 22 | #include <gelf.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #include "libelfP.h" |
| 26 | |
| 27 | |
| 28 | int |
| 29 | gelf_update_dyn (data, ndx, src) |
| 30 | Elf_Data *data; |
| 31 | int ndx; |
| 32 | GElf_Dyn *src; |
| 33 | { |
| 34 | Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data; |
| 35 | Elf_Scn *scn; |
| 36 | int result = 0; |
| 37 | |
| 38 | if (data == NULL) |
| 39 | return 0; |
| 40 | |
| 41 | if (unlikely (ndx < 0)) |
| 42 | { |
| 43 | __libelf_seterrno (ELF_E_INVALID_INDEX); |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | if (unlikely (data_scn->d.d_type != ELF_T_DYN)) |
| 48 | { |
| 49 | /* The type of the data better should match. */ |
| 50 | __libelf_seterrno (ELF_E_DATA_MISMATCH); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | scn = data_scn->s; |
| 55 | rwlock_wrlock (scn->elf->lock); |
| 56 | |
| 57 | if (scn->elf->class == ELFCLASS32) |
| 58 | { |
| 59 | Elf32_Dyn *dyn; |
| 60 | |
| 61 | /* There is the possibility that the values in the input are |
| 62 | too large. */ |
| 63 | if (unlikely (src->d_tag < -0x80000000ll) |
| 64 | || unlikely (src->d_tag > 0x7fffffffll) |
| 65 | || unlikely (src->d_un.d_val > 0xffffffffull)) |
| 66 | { |
| 67 | __libelf_seterrno (ELF_E_INVALID_DATA); |
| 68 | goto out; |
| 69 | } |
| 70 | |
| 71 | /* Check whether we have to resize the data buffer. */ |
| 72 | if (unlikely ((ndx + 1) * sizeof (Elf32_Dyn) > data_scn->d.d_size)) |
| 73 | { |
| 74 | __libelf_seterrno (ELF_E_INVALID_INDEX); |
| 75 | goto out; |
| 76 | } |
| 77 | |
| 78 | dyn = &((Elf32_Dyn *) data_scn->d.d_buf)[ndx]; |
| 79 | |
| 80 | dyn->d_tag = src->d_tag; |
| 81 | dyn->d_un.d_val = src->d_un.d_val; |
| 82 | } |
| 83 | else |
| 84 | { |
| 85 | /* Check whether we have to resize the data buffer. */ |
| 86 | if (unlikely ((ndx + 1) * sizeof (Elf64_Dyn) > data_scn->d.d_size)) |
| 87 | { |
| 88 | __libelf_seterrno (ELF_E_INVALID_INDEX); |
| 89 | goto out; |
| 90 | } |
| 91 | |
| 92 | ((Elf64_Dyn *) data_scn->d.d_buf)[ndx] = *src; |
| 93 | } |
| 94 | |
| 95 | result = 1; |
| 96 | |
| 97 | /* Mark the section as modified. */ |
| 98 | scn->flags |= ELF_F_DIRTY; |
| 99 | |
| 100 | out: |
| 101 | rwlock_unlock (scn->elf->lock); |
| 102 | |
| 103 | return result; |
| 104 | } |