1/*-
2 * Copyright (c) 2006 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 <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/limits.h>
31
32#include <assert.h>
33#include <gelf.h>
34#include <osreldate.h>
35
36#include "_libelf.h"
37
38#if	__FreeBSD_version >= 700025
39
40GElf_Move *
41gelf_getmove(Elf_Data *d, int ndx, GElf_Move *dst)
42{
43	int ec;
44	Elf *e;
45	Elf_Scn *scn;
46	Elf32_Move *move32;
47	Elf64_Move *move64;
48	size_t msz;
49	uint32_t sh_type;
50
51	if (d == NULL || ndx < 0 || dst == NULL ||
52	    (scn = d->d_scn) == NULL ||
53	    (e = scn->s_elf) == NULL) {
54		LIBELF_SET_ERROR(ARGUMENT, 0);
55		return (NULL);
56	}
57
58	ec = e->e_class;
59	assert(ec == ELFCLASS32 || ec == ELFCLASS64);
60
61	if (ec == ELFCLASS32)
62		sh_type = scn->s_shdr.s_shdr32.sh_type;
63	else
64		sh_type = scn->s_shdr.s_shdr64.sh_type;
65
66	if (_libelf_xlate_shtype(sh_type) != ELF_T_MOVE) {
67		LIBELF_SET_ERROR(ARGUMENT, 0);
68		return (NULL);
69	}
70
71	msz = _libelf_msize(ELF_T_MOVE, ec, e->e_version);
72
73	assert(msz > 0);
74
75	if (msz * ndx >= d->d_size) {
76		LIBELF_SET_ERROR(ARGUMENT, 0);
77		return (NULL);
78	}
79
80	if (ec == ELFCLASS32) {
81
82		move32 = (Elf32_Move *) d->d_buf + ndx;
83
84		dst->m_value   = move32->m_value;
85		dst->m_info    = (Elf64_Xword) move32->m_info;
86		dst->m_poffset = (Elf64_Xword) move32->m_poffset;
87		dst->m_repeat  = move32->m_repeat;
88		dst->m_stride = move32->m_stride;
89	} else {
90
91		move64 = (Elf64_Move *) d->d_buf + ndx;
92
93		*dst = *move64;
94	}
95
96	return (dst);
97}
98
99int
100gelf_update_move(Elf_Data *d, int ndx, GElf_Move *gm)
101{
102	int ec;
103	Elf *e;
104	Elf_Scn *scn;
105	Elf32_Move *move32;
106	Elf64_Move *move64;
107	size_t msz;
108	uint32_t sh_type;
109
110	if (d == NULL || ndx < 0 || gm == NULL ||
111	    (scn = d->d_scn) == NULL ||
112	    (e = scn->s_elf) == NULL) {
113		LIBELF_SET_ERROR(ARGUMENT, 0);
114		return (0);
115	}
116
117	ec = e->e_class;
118	assert(ec == ELFCLASS32 || ec == ELFCLASS64);
119
120	if (ec == ELFCLASS32)
121		sh_type = scn->s_shdr.s_shdr32.sh_type;
122	else
123		sh_type = scn->s_shdr.s_shdr64.sh_type;
124
125	if (_libelf_xlate_shtype(sh_type) != ELF_T_MOVE) {
126		LIBELF_SET_ERROR(ARGUMENT, 0);
127		return (0);
128	}
129
130	msz = _libelf_msize(ELF_T_MOVE, ec, e->e_version);
131	assert(msz > 0);
132
133	if (msz * ndx >= d->d_size) {
134		LIBELF_SET_ERROR(ARGUMENT, 0);
135		return (0);
136	}
137
138	if (ec == ELFCLASS32) {
139		move32 = (Elf32_Move *) d->d_buf + ndx;
140
141		move32->m_value  = gm->m_value;
142		LIBELF_COPY_U32(move32, gm, m_info);
143		LIBELF_COPY_U32(move32, gm, m_poffset);
144		move32->m_repeat  = gm->m_repeat;
145		move32->m_stride = gm->m_stride;
146
147	} else {
148		move64 = (Elf64_Move *) d->d_buf + ndx;
149
150		*move64 = *gm;
151	}
152
153	return (1);
154}
155
156#endif	/* __FreeBSD_version >= 700025 */
157