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 <libelf.h>
31
32 #include "_libelf.h"
33
34 unsigned int
elf_flagdata(Elf_Data * d,Elf_Cmd c,unsigned int flags)35 elf_flagdata(Elf_Data *d, Elf_Cmd c, unsigned int flags)
36 {
37 Elf *e;
38 Elf_Scn *scn;
39 unsigned int r;
40
41 if (d == NULL)
42 return (0);
43
44 if ((c != ELF_C_SET && c != ELF_C_CLR) || (scn = d->d_scn) == NULL ||
45 (e = scn->s_elf) == NULL || e->e_kind != ELF_K_ELF ||
46 (flags & ~ELF_F_DIRTY) != 0) {
47 LIBELF_SET_ERROR(ARGUMENT, 0);
48 return (0);
49 }
50
51 if (c == ELF_C_SET)
52 r = scn->s_flags |= flags;
53 else
54 r = scn->s_flags &= ~flags;
55
56 return (r);
57 }
58
59 unsigned int
elf_flagehdr(Elf * e,Elf_Cmd c,unsigned int flags)60 elf_flagehdr(Elf *e, Elf_Cmd c, unsigned int flags)
61 {
62 int ec;
63 void *ehdr;
64
65 if (e == NULL)
66 return (0);
67
68 if ((c != ELF_C_SET && c != ELF_C_CLR) ||
69 (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 ||
70 ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
71 LIBELF_SET_ERROR(ARGUMENT, 0);
72 return (0);
73 }
74
75 if (ec == ELFCLASS32)
76 ehdr = e->e_u.e_elf.e_ehdr.e_ehdr32;
77 else
78 ehdr = e->e_u.e_elf.e_ehdr.e_ehdr64;
79
80 if (ehdr == NULL) {
81 LIBELF_SET_ERROR(SEQUENCE, 0);
82 return (0);
83 }
84
85 return (elf_flagelf(e, c, flags));
86 }
87
88 unsigned int
elf_flagelf(Elf * e,Elf_Cmd c,unsigned int flags)89 elf_flagelf(Elf *e, Elf_Cmd c, unsigned int flags)
90 {
91 int r;
92
93 if (e == NULL)
94 return (0);
95
96 if ((c != ELF_C_SET && c != ELF_C_CLR) ||
97 (e->e_kind != ELF_K_ELF) ||
98 (flags & ~(ELF_F_DIRTY|ELF_F_LAYOUT)) != 0) {
99 LIBELF_SET_ERROR(ARGUMENT, 0);
100 return (0);
101 }
102
103 if (c == ELF_C_SET)
104 r = e->e_flags |= flags;
105 else
106 r = e->e_flags &= ~flags;
107 return (r);
108 }
109
110 unsigned int
elf_flagphdr(Elf * e,Elf_Cmd c,unsigned int flags)111 elf_flagphdr(Elf *e, Elf_Cmd c, unsigned int flags)
112 {
113 int ec;
114 void *phdr;
115
116 if (e == NULL)
117 return (0);
118
119 if ((c != ELF_C_SET && c != ELF_C_CLR) ||
120 (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 ||
121 ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
122 LIBELF_SET_ERROR(ARGUMENT, 0);
123 return (0);
124 }
125
126 if (ec == ELFCLASS32)
127 phdr = e->e_u.e_elf.e_phdr.e_phdr32;
128 else
129 phdr = e->e_u.e_elf.e_phdr.e_phdr64;
130
131 if (phdr == NULL) {
132 LIBELF_SET_ERROR(SEQUENCE, 0);
133 return (0);
134 }
135
136 return (elf_flagelf(e, c, flags));
137 }
138
139 unsigned int
elf_flagscn(Elf_Scn * s,Elf_Cmd c,unsigned int flags)140 elf_flagscn(Elf_Scn *s, Elf_Cmd c, unsigned int flags)
141 {
142 int r;
143
144 if (s == NULL)
145 return (0);
146
147 if ((c != ELF_C_SET && c != ELF_C_CLR) ||
148 (flags & ~ELF_F_DIRTY) != 0) {
149 LIBELF_SET_ERROR(ARGUMENT, 0);
150 return (0);
151 }
152
153 if (c == ELF_C_SET)
154 r = s->s_flags |= flags;
155 else
156 r = s->s_flags &= ~flags;
157 return (r);
158 }
159
160 unsigned int
elf_flagshdr(Elf_Scn * s,Elf_Cmd c,unsigned int flags)161 elf_flagshdr(Elf_Scn *s, Elf_Cmd c, unsigned int flags)
162 {
163 return (elf_flagscn(s, c, flags));
164 }
165