1 /* Get next section. 2 Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. 3 Contributed by Ulrich Drepper <drepper (at) redhat.com>, 1998. 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 <assert.h> 23 #include <libelf.h> 24 #include <stddef.h> 25 26 #include "libelfP.h" 27 28 29 Elf_Scn * 30 elf_nextscn (elf, scn) 31 Elf *elf; 32 Elf_Scn *scn; 33 { 34 Elf_Scn *result = NULL; 35 36 if (elf == NULL) 37 return NULL; 38 39 rwlock_rdlock (elf->lock); 40 41 if (scn == NULL) 42 { 43 /* If no section handle is given return the first (not 0th) section. */ 44 if (elf->class == ELFCLASS32 45 || (offsetof (Elf, state.elf32.scns) 46 == offsetof (Elf, state.elf64.scns))) 47 { 48 if (elf->state.elf32.scns.cnt > 1) 49 result = &elf->state.elf32.scns.data[1]; 50 } 51 else 52 { 53 if (elf->state.elf64.scns.cnt > 1) 54 result = &elf->state.elf64.scns.data[1]; 55 } 56 } 57 else 58 { 59 Elf_ScnList *list = scn->list; 60 61 if (scn + 1 < &list->data[list->cnt]) 62 result = scn + 1; 63 else if (scn + 1 == &list->data[list->max] 64 && (list = list->next) != NULL) 65 { 66 /* If there is another element in the section list it must 67 have at least one entry. */ 68 assert (list->cnt > 0); 69 result = &list->data[0]; 70 } 71 } 72 73 rwlock_unlock (elf->lock); 74 75 return result; 76 } 77 INTDEF(elf_nextscn) 78
