1 /* Return the size of an object file type.
2 Copyright (C) 1998-2010, 2015 Red Hat, Inc.
3 This file is part of elfutils.
4 Written by Ulrich Drepper <drepper@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 <gelf.h>
35 #include <stddef.h>
36
37 #include "libelfP.h"
38
39
40 /* These are the sizes for all the known types. */
41 const size_t __libelf_type_sizes[ELFCLASSNUM - 1][ELF_T_NUM] =
42 {
43 [ELFCLASS32 - 1] = {
44 #define TYPE_SIZES(LIBELFBITS) \
45 [ELF_T_ADDR] = ELFW2(LIBELFBITS, FSZ_ADDR), \
46 [ELF_T_OFF] = ELFW2(LIBELFBITS, FSZ_OFF), \
47 [ELF_T_BYTE] = 1, \
48 [ELF_T_HALF] = ELFW2(LIBELFBITS, FSZ_HALF), \
49 [ELF_T_WORD] = ELFW2(LIBELFBITS, FSZ_WORD), \
50 [ELF_T_SWORD] = ELFW2(LIBELFBITS, FSZ_SWORD), \
51 [ELF_T_XWORD] = ELFW2(LIBELFBITS, FSZ_XWORD), \
52 [ELF_T_SXWORD] = ELFW2(LIBELFBITS, FSZ_SXWORD), \
53 [ELF_T_EHDR] = sizeof (ElfW2(LIBELFBITS, Ext_Ehdr)), \
54 [ELF_T_SHDR] = sizeof (ElfW2(LIBELFBITS, Ext_Shdr)), \
55 [ELF_T_SYM] = sizeof (ElfW2(LIBELFBITS, Ext_Sym)), \
56 [ELF_T_REL] = sizeof (ElfW2(LIBELFBITS, Ext_Rel)), \
57 [ELF_T_RELA] = sizeof (ElfW2(LIBELFBITS, Ext_Rela)), \
58 [ELF_T_PHDR] = sizeof (ElfW2(LIBELFBITS, Ext_Phdr)), \
59 [ELF_T_DYN] = sizeof (ElfW2(LIBELFBITS, Ext_Dyn)), \
60 [ELF_T_VDEF] = sizeof (ElfW2(LIBELFBITS, Ext_Verdef)), \
61 [ELF_T_VDAUX] = sizeof (ElfW2(LIBELFBITS, Ext_Verdaux)), \
62 [ELF_T_VNEED] = sizeof (ElfW2(LIBELFBITS, Ext_Verneed)), \
63 [ELF_T_VNAUX] = sizeof (ElfW2(LIBELFBITS, Ext_Vernaux)), \
64 [ELF_T_NHDR] = sizeof (ElfW2(LIBELFBITS, Ext_Nhdr)), \
65 /* Note the header size is the same, but padding is different. */ \
66 [ELF_T_NHDR8] = sizeof (ElfW2(LIBELFBITS, Ext_Nhdr)), \
67 [ELF_T_SYMINFO] = sizeof (ElfW2(LIBELFBITS, Ext_Syminfo)), \
68 [ELF_T_MOVE] = sizeof (ElfW2(LIBELFBITS, Ext_Move)), \
69 [ELF_T_LIB] = sizeof (ElfW2(LIBELFBITS, Ext_Lib)), \
70 [ELF_T_AUXV] = sizeof (ElfW2(LIBELFBITS, Ext_auxv_t)), \
71 [ELF_T_CHDR] = sizeof (ElfW2(LIBELFBITS, Ext_Chdr)), \
72 [ELF_T_GNUHASH] = ELFW2(LIBELFBITS, FSZ_WORD)
73 TYPE_SIZES (32)
74 },
75 [ELFCLASS64 - 1] = {
76 TYPE_SIZES (64)
77 }
78 };
79
80
81 size_t
gelf_fsize(Elf * elf,Elf_Type type,size_t count,unsigned int version)82 gelf_fsize (Elf *elf, Elf_Type type, size_t count, unsigned int version)
83 {
84 /* We do not have differences between file and memory sizes. Better
85 not since otherwise `mmap' would not work. */
86 if (elf == NULL)
87 return 0;
88
89 if (version != EV_CURRENT)
90 {
91 __libelf_seterrno (ELF_E_UNKNOWN_VERSION);
92 return 0;
93 }
94
95 if (type >= ELF_T_NUM)
96 {
97 __libelf_seterrno (ELF_E_UNKNOWN_TYPE);
98 return 0;
99 }
100
101 return count * __libelf_type_sizes[elf->class - 1][type];
102 }
103 INTDEF(gelf_fsize)
104