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 (at) 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 } 105
