2 * Copyright (c) 2006 Joseph Koshy
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
36 * Retrieve section #0, allocating a new section if needed.
39 _libelf_getscn0(Elf *e)
43 if ((s = STAILQ_FIRST(&e->e_u.e_elf.e_scn)) != NULL)
46 return (_libelf_allocate_scn(e, (size_t) SHN_UNDEF));
50 _libelf_setshnum(Elf *e, void *eh, int ec, size_t shnum)
54 if (shnum >= SHN_LORESERVE) {
55 if ((scn = _libelf_getscn0(e)) == NULL)
58 assert(scn->s_ndx == SHN_UNDEF);
61 scn->s_shdr.s_shdr32.sh_size = shnum;
63 scn->s_shdr.s_shdr64.sh_size = shnum;
65 (void) elf_flagshdr(scn, ELF_C_SET, ELF_F_DIRTY);
71 ((Elf32_Ehdr *) eh)->e_shnum = shnum;
73 ((Elf64_Ehdr *) eh)->e_shnum = shnum;
80 _libelf_setshstrndx(Elf *e, void *eh, int ec, size_t shstrndx)
84 if (shstrndx >= SHN_LORESERVE) {
85 if ((scn = _libelf_getscn0(e)) == NULL)
88 assert(scn->s_ndx == SHN_UNDEF);
91 scn->s_shdr.s_shdr32.sh_link = shstrndx;
93 scn->s_shdr.s_shdr64.sh_link = shstrndx;
95 (void) elf_flagshdr(scn, ELF_C_SET, ELF_F_DIRTY);
97 shstrndx = SHN_XINDEX;
100 if (ec == ELFCLASS32)
101 ((Elf32_Ehdr *) eh)->e_shstrndx = shstrndx;
103 ((Elf64_Ehdr *) eh)->e_shstrndx = shstrndx;
109 _libelf_setphnum(Elf *e, void *eh, int ec, size_t phnum)
113 if (phnum >= PN_XNUM) {
114 if ((scn = _libelf_getscn0(e)) == NULL)
117 assert(scn->s_ndx == SHN_UNDEF);
119 if (ec == ELFCLASS32)
120 scn->s_shdr.s_shdr32.sh_info = phnum;
122 scn->s_shdr.s_shdr64.sh_info = phnum;
124 (void) elf_flagshdr(scn, ELF_C_SET, ELF_F_DIRTY);
129 if (ec == ELFCLASS32)
130 ((Elf32_Ehdr *) eh)->e_phnum = phnum;
132 ((Elf64_Ehdr *) eh)->e_phnum = phnum;