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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
40 _libelf_getphdr(Elf *e, int ec)
42 size_t phnum, phentsize;
48 int (*xlator)(char *_d, size_t _dsz, char *_s, size_t _c, int _swap);
50 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
53 LIBELF_SET_ERROR(ARGUMENT, 0);
57 if ((phdr = (ec == ELFCLASS32 ?
58 (void *) e->e_u.e_elf.e_phdr.e_phdr32 :
59 (void *) e->e_u.e_elf.e_phdr.e_phdr64)) != NULL)
63 * Check the PHDR related fields in the EHDR for sanity.
66 if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL)
69 phnum = e->e_u.e_elf.e_nphdr;
71 if (ec == ELFCLASS32) {
72 eh32 = (Elf32_Ehdr *) ehdr;
73 phentsize = eh32->e_phentsize;
74 phoff = (uint64_t) eh32->e_phoff;
76 eh64 = (Elf64_Ehdr *) ehdr;
77 phentsize = eh64->e_phentsize;
78 phoff = (uint64_t) eh64->e_phoff;
81 fsz = gelf_fsize(e, ELF_T_PHDR, phnum, e->e_version);
85 if ((uint64_t) e->e_rawsize < (phoff + fsz)) {
86 LIBELF_SET_ERROR(HEADER, 0);
90 msz = _libelf_msize(ELF_T_PHDR, ec, EV_CURRENT);
94 if ((phdr = calloc(phnum, msz)) == NULL) {
95 LIBELF_SET_ERROR(RESOURCE, 0);
100 e->e_u.e_elf.e_phdr.e_phdr32 = phdr;
102 e->e_u.e_elf.e_phdr.e_phdr64 = phdr;
105 xlator = _libelf_get_translator(ELF_T_PHDR, ELF_TOMEMORY, ec);
106 (*xlator)(phdr, phnum * msz, e->e_rawfile + phoff, phnum,
107 e->e_byteorder != LIBELF_PRIVATE(byteorder));
113 _libelf_newphdr(Elf *e, int ec, size_t count)
115 void *ehdr, *newphdr, *oldphdr;
119 LIBELF_SET_ERROR(ARGUMENT, 0);
123 if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL) {
124 LIBELF_SET_ERROR(SEQUENCE, 0);
128 assert(e->e_class == ec);
129 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
130 assert(e->e_version == EV_CURRENT);
132 msz = _libelf_msize(ELF_T_PHDR, ec, e->e_version);
137 if (count > 0 && (newphdr = calloc(count, msz)) == NULL) {
138 LIBELF_SET_ERROR(RESOURCE, 0);
142 if (ec == ELFCLASS32) {
143 if ((oldphdr = (void *) e->e_u.e_elf.e_phdr.e_phdr32) != NULL)
145 e->e_u.e_elf.e_phdr.e_phdr32 = (Elf32_Phdr *) newphdr;
147 if ((oldphdr = (void *) e->e_u.e_elf.e_phdr.e_phdr64) != NULL)
149 e->e_u.e_elf.e_phdr.e_phdr64 = (Elf64_Phdr *) newphdr;
152 e->e_u.e_elf.e_nphdr = count;
154 elf_flagphdr(e, ELF_C_SET, ELF_F_DIRTY);