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
32 ELFTC_VCSID("$Id: libelf_extended.c 3174 2015-03-27 17:13:41Z emaste $");
35 * Retrieve section #0, allocating a new section if needed.
38 _libelf_getscn0(Elf *e)
42 if ((s = STAILQ_FIRST(&e->e_u.e_elf.e_scn)) != NULL)
45 return (_libelf_allocate_scn(e, (size_t) SHN_UNDEF));
49 _libelf_setshnum(Elf *e, void *eh, int ec, size_t shnum)
53 if (shnum >= SHN_LORESERVE) {
54 if ((scn = _libelf_getscn0(e)) == NULL)
57 assert(scn->s_ndx == SHN_UNDEF);
60 scn->s_shdr.s_shdr32.sh_size = shnum;
62 scn->s_shdr.s_shdr64.sh_size = shnum;
64 (void) elf_flagshdr(scn, ELF_C_SET, ELF_F_DIRTY);
70 ((Elf32_Ehdr *) eh)->e_shnum = shnum & 0xFFFFU;
72 ((Elf64_Ehdr *) eh)->e_shnum = shnum & 0xFFFFU;
79 _libelf_setshstrndx(Elf *e, void *eh, int ec, size_t shstrndx)
83 if (shstrndx >= SHN_LORESERVE) {
84 if ((scn = _libelf_getscn0(e)) == NULL)
87 assert(scn->s_ndx == SHN_UNDEF);
90 scn->s_shdr.s_shdr32.sh_link = shstrndx;
92 scn->s_shdr.s_shdr64.sh_link = shstrndx;
94 (void) elf_flagshdr(scn, ELF_C_SET, ELF_F_DIRTY);
96 shstrndx = SHN_XINDEX;
100 ((Elf32_Ehdr *) eh)->e_shstrndx = shstrndx & 0xFFFFU;
102 ((Elf64_Ehdr *) eh)->e_shstrndx = shstrndx & 0xFFFFU;
108 _libelf_setphnum(Elf *e, void *eh, int ec, size_t phnum)
112 if (phnum >= PN_XNUM) {
113 if ((scn = _libelf_getscn0(e)) == NULL)
116 assert(scn->s_ndx == SHN_UNDEF);
118 if (ec == ELFCLASS32)
119 scn->s_shdr.s_shdr32.sh_info = phnum;
121 scn->s_shdr.s_shdr64.sh_info = phnum;
123 (void) elf_flagshdr(scn, ELF_C_SET, ELF_F_DIRTY);
128 if (ec == ELFCLASS32)
129 ((Elf32_Ehdr *) eh)->e_phnum = phnum & 0xFFFFU;
131 ((Elf64_Ehdr *) eh)->e_phnum = phnum & 0xFFFFU;