1 /* Return raw section content. 2 Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc. 3 This file is part of elfutils. 4 Contributed by Ulrich Drepper <drepper (at) redhat.com>, 1998. 5 6 This file is free software; you can redistribute it and/or modify 7 it under the terms of either 8 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 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 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/>. */ 29 30 #ifdef HAVE_CONFIG_H 31 # include <config.h> 32 #endif 33 34 #include <stdlib.h> 35 36 #include "libelfP.h" 37 38 39 Elf_Data * 40 elf_rawdata (Elf_Scn *scn, Elf_Data *data) 41 { 42 if (scn == NULL || scn->elf->kind != ELF_K_ELF) 43 { 44 __libelf_seterrno (ELF_E_INVALID_HANDLE); 45 return NULL; 46 } 47 48 /* If `data' is not NULL this means we are not addressing the initial 49 data in the file. But this also means this data is already read 50 (since otherwise it is not possible to have a valid `data' pointer) 51 and all the data structures are initialized as well. In this case 52 we can simply walk the list of data records. */ 53 if (data != NULL 54 || (scn->data_read != 0 && (scn->flags & ELF_F_FILEDATA) == 0)) 55 { 56 /* We don't allow accessing any but the data read from the file 57 as raw. */ 58 __libelf_seterrno (ELF_E_DATA_MISMATCH); 59 return NULL; 60 } 61 62 /* If the data for this section was not yet initialized do it now. */ 63 if (scn->data_read == 0) 64 { 65 /* First thing we do is to read the data from the file. There is 66 always a file (or memory region) associated with this descriptor 67 since otherwise the `data_read' flag would be set. */ 68 if (__libelf_set_rawdata (scn) != 0) 69 /* Something went wrong. The error value is already set. */ 70 return NULL; 71 } 72 73 /* Return the first data element in the list. */ 74 return &scn->rawdata.d; 75 } 76 INTDEF(elf_rawdata) 77
