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132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
/*-
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* Copyright (c) 2006 Joseph Koshy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/limits.h>
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#include <assert.h>
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#include <gelf.h>
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#include <libelf.h>
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#include "_libelf.h"
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Elf32_Shdr *
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elf32_getshdr(Elf_Scn *s)
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{
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return (_libelf_getshdr(s, ELFCLASS32));
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}
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Elf64_Shdr *
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elf64_getshdr(Elf_Scn *s)
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{
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return (_libelf_getshdr(s, ELFCLASS64));
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}
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GElf_Shdr *
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gelf_getshdr(Elf_Scn *s, GElf_Shdr *d)
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{
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int ec;
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void *sh;
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Elf32_Shdr *sh32;
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Elf64_Shdr *sh64;
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if (d == NULL) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (NULL);
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}
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if ((sh = _libelf_getshdr(s, ELFCLASSNONE)) == NULL)
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return (NULL);
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ec = s->s_elf->e_class;
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assert(ec == ELFCLASS32 || ec == ELFCLASS64);
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if (ec == ELFCLASS32) {
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sh32 = (Elf32_Shdr *) sh;
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d->sh_name = sh32->sh_name;
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d->sh_type = sh32->sh_type;
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d->sh_flags = (Elf64_Xword) sh32->sh_flags;
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d->sh_addr = (Elf64_Addr) sh32->sh_addr;
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d->sh_offset = (Elf64_Off) sh32->sh_offset;
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d->sh_size = (Elf64_Xword) sh32->sh_size;
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d->sh_link = sh32->sh_link;
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d->sh_info = sh32->sh_info;
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d->sh_addralign = (Elf64_Xword) sh32->sh_addralign;
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d->sh_entsize = (Elf64_Xword) sh32->sh_entsize;
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} else {
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sh64 = (Elf64_Shdr *) sh;
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*d = *sh64;
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}
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return (d);
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}
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int
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gelf_update_shdr(Elf_Scn *scn, GElf_Shdr *s)
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{
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int ec;
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Elf *e;
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Elf32_Shdr *sh32;
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if (s == NULL || scn == NULL || (e = scn->s_elf) == NULL ||
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e->e_kind != ELF_K_ELF ||
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((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (0);
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}
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if (e->e_cmd == ELF_C_READ) {
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LIBELF_SET_ERROR(MODE, 0);
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return (0);
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}
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if (ec == ELFCLASS64) {
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scn->s_shdr.s_shdr64 = *s;
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return (1);
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}
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sh32 = &scn->s_shdr.s_shdr32;
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sh32->sh_name = s->sh_name;
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sh32->sh_type = s->sh_type;
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LIBELF_COPY_U32(sh32, s, sh_flags);
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LIBELF_COPY_U32(sh32, s, sh_addr);
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LIBELF_COPY_U32(sh32, s, sh_offset);
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LIBELF_COPY_U32(sh32, s, sh_size);
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sh32->sh_link = s->sh_link;
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sh32->sh_info = s->sh_info;
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LIBELF_COPY_U32(sh32, s, sh_addralign);
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LIBELF_COPY_U32(sh32, s, sh_entsize);
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(void) elf_flagscn(scn, ELF_C_SET, ELF_F_DIRTY);
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return (1);
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}
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