xref: /freebsd/contrib/elftoolchain/libelf/libelf_msize.m4 (revision cfd6422a5217410fbd66f7a7a8a64d9d85e61229) 
1/*-
2 * Copyright (c) 2006,2008-2011 Joseph Koshy
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <assert.h>
28#include <libelf.h>
29#include <string.h>
30
31#include "_libelf.h"
32
33ELFTC_VCSID("$Id: libelf_msize.m4 3732 2019-04-22 11:08:38Z jkoshy $");
34
35/* WARNING: GENERATED FROM __file__. */
36
37struct msize {
38	size_t	msz32;
39	size_t	msz64;
40};
41
42divert(-1)
43include(SRCDIR`/elf_types.m4')
44
45/*
46 * ELF types whose memory representations have a variable size.
47 */
48define(BYTE_SIZE,	1)
49define(GNUHASH_SIZE,	1)
50define(NOTE_SIZE,	1)
51define(VDEF_SIZE,	1)
52define(VNEED_SIZE,	1)
53
54/*
55 * Unimplemented types.
56 */
57define(MOVEP_SIZE,	0)
58define(SXWORD_SIZE32,	0)
59define(XWORD_SIZE32,	0)
60
61define(`DEFINE_ELF_MSIZE',
62  `ifdef($1`_SIZE',
63    `define($1_SIZE32,$1_SIZE)
64     define($1_SIZE64,$1_SIZE)',
65    `ifdef($1`_SIZE32',`',
66      `define($1_SIZE32,sizeof(Elf32_$2))')
67     ifdef($1`_SIZE64',`',
68      `define($1_SIZE64,sizeof(Elf64_$2))')')')
69define(`DEFINE_ELF_MSIZES',
70  `ifelse($#,1,`',
71    `DEFINE_ELF_MSIZE($1)
72     DEFINE_ELF_MSIZES(shift($@))')')
73
74DEFINE_ELF_MSIZES(ELF_TYPE_LIST)
75
76define(`MSIZE',
77  `[ELF_T_$1] = { .msz32 = $1_SIZE32, .msz64 = $1_SIZE64 },
78')
79define(`MSIZES',
80  `ifelse($#,1,`',
81    `MSIZE($1)
82MSIZES(shift($@))')')
83
84divert(0)
85
86static struct msize msize[ELF_T_NUM] = {
87MSIZES(ELF_TYPE_LIST)
88};
89
90/*
91 * Returns the memory size of the specified ELF type 't' of ELF
92 * class 'ec' and ELF version 'version'.
93 *
94 * If the specified combination of ELF type, class, and version is
95 * unsupported then a value of 0 will be returned and the appropriate
96 * library error code set.
97 */
98size_t
99_libelf_msize(Elf_Type t, int elfclass, unsigned int version)
100{
101	size_t sz;
102
103	assert(elfclass == ELFCLASS32 || elfclass == ELFCLASS64);
104	assert((signed) t >= ELF_T_FIRST && t <= ELF_T_LAST);
105
106	if (version != EV_CURRENT) {
107		LIBELF_SET_ERROR(VERSION, 0);
108		return (0);
109	}
110
111	sz = (elfclass == ELFCLASS32) ? msize[t].msz32 : msize[t].msz64;
112
113	if (sz == 0) {
114		LIBELF_SET_ERROR(UNIMPL, 0);
115		return (0);
116	}
117
118	return (sz);
119}
120