2 * Copyright (c) 2006,2008 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>
34 ELFTC_VCSID("$Id: libelf_extended.c 2225 2011-11-26 18:55:54Z jkoshy $");
37 * Retrieve section #0, allocating a new section if needed.
40 _libelf_getscn0(Elf *e)
44 if ((s = STAILQ_FIRST(&e->e_u.e_elf.e_scn)) != NULL)
47 return (_libelf_allocate_scn(e, (size_t) SHN_UNDEF));
51 _libelf_setshnum(Elf *e, void *eh, int ec, size_t shnum)
55 if (shnum >= SHN_LORESERVE) {
56 if ((scn = _libelf_getscn0(e)) == NULL)
59 assert(scn->s_ndx == SHN_UNDEF);
62 scn->s_shdr.s_shdr32.sh_size = shnum;
64 scn->s_shdr.s_shdr64.sh_size = shnum;
66 (void) elf_flagshdr(scn, ELF_C_SET, ELF_F_DIRTY);
72 ((Elf32_Ehdr *) eh)->e_shnum = shnum;
74 ((Elf64_Ehdr *) eh)->e_shnum = shnum;
81 _libelf_setshstrndx(Elf *e, void *eh, int ec, size_t shstrndx)
85 if (shstrndx >= SHN_LORESERVE) {
86 if ((scn = _libelf_getscn0(e)) == NULL)
89 assert(scn->s_ndx == SHN_UNDEF);
92 scn->s_shdr.s_shdr32.sh_link = shstrndx;
94 scn->s_shdr.s_shdr64.sh_link = shstrndx;
96 (void) elf_flagshdr(scn, ELF_C_SET, ELF_F_DIRTY);
98 shstrndx = SHN_XINDEX;
101 if (ec == ELFCLASS32)
102 ((Elf32_Ehdr *) eh)->e_shstrndx = shstrndx;
104 ((Elf64_Ehdr *) eh)->e_shstrndx = shstrndx;
110 _libelf_setphnum(Elf *e, void *eh, int ec, size_t phnum)
114 if (phnum >= PN_XNUM) {
115 if ((scn = _libelf_getscn0(e)) == NULL)
118 assert(scn->s_ndx == SHN_UNDEF);
120 if (ec == ELFCLASS32)
121 scn->s_shdr.s_shdr32.sh_info = phnum;
123 scn->s_shdr.s_shdr64.sh_info = phnum;
125 (void) elf_flagshdr(scn, ELF_C_SET, ELF_F_DIRTY);
130 if (ec == ELFCLASS32)
131 ((Elf32_Ehdr *) eh)->e_phnum = phnum;
133 ((Elf64_Ehdr *) eh)->e_phnum = phnum;