1 /* Update section header. 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_shdr (Elf_Scn *scn, GElf_Shdr *src) 30 { 31 int result = 0; 32 Elf *elf; 33 34 if (scn == NULL || src == NULL) 35 return 0; 36 37 elf = scn->elf; 38 rwlock_wrlock (elf->lock); 39 40 if (elf->class == ELFCLASS32) 41 { 42 Elf32_Shdr *shdr = scn->shdr.e32 ?: INTUSE(elf32_getshdr) (scn); 43 44 if (shdr == NULL) 45 { 46 __libelf_seterrno (ELF_E_INVALID_OPERAND); 47 goto out; 48 } 49 50 if (unlikely (src->sh_flags > 0xffffffffull) 51 || unlikely (src->sh_addr > 0xffffffffull) 52 || unlikely (src->sh_offset > 0xffffffffull) 53 || unlikely (src->sh_size > 0xffffffffull) 54 || unlikely (src->sh_addralign > 0xffffffffull) 55 || unlikely (src->sh_entsize > 0xffffffffull)) 56 { 57 __libelf_seterrno (ELF_E_INVALID_DATA); 58 goto out; 59 } 60 61 #define COPY(name) \ 62 shdr->name = src->name 63 COPY (sh_name); 64 COPY (sh_type); 65 COPY (sh_flags); 66 COPY (sh_addr); 67 COPY (sh_offset); 68 COPY (sh_size); 69 COPY (sh_link); 70 COPY (sh_info); 71 COPY (sh_addralign); 72 COPY (sh_entsize); 73 } 74 else 75 { 76 Elf64_Shdr *shdr = scn->shdr.e64 ?: INTUSE(elf64_getshdr) (scn); 77 78 if (shdr == NULL) 79 { 80 __libelf_seterrno (ELF_E_INVALID_OPERAND); 81 goto out; 82 } 83 84 /* We only have to copy the data. */ 85 (void) memcpy (shdr, src, sizeof (GElf_Shdr)); 86 } 87 88 result = 1; 89 90 out: 91 rwlock_unlock (elf->lock); 92 93 return result; 94 } 95
