839529caa9
Some notable improvements include: readelf: - Add AArch64 relocation definitions. - Report value of unknown relocation types. elfcopy: - Consider symbols with STB_GNU_UNIQUE binding as global symbols. - Fixed support for VMA adjustment for loadable sections found in relocatable objects. - Handle nameless global symbols. - Improve wildcard matching for !-prefixed symbols. - Add PE/COFF support. elfdump: - Improve section type reporting. - Add MIPS-specific section types. This update also includes a significant number of bug fixes. PR: 207091 [exp-run] Sponsored by: The FreeBSD Foundation
146 lines
3.6 KiB
C
146 lines
3.6 KiB
C
/*-
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* Copyright (c) 2015 Kai Wang
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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/stat.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "_libpe.h"
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ELFTC_VCSID("$Id: libpe_init.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
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int
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libpe_open_object(PE *pe)
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{
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struct stat sb;
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mode_t mode;
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char magic[sizeof(PE_DosHdr)];
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if (fstat(pe->pe_fd, &sb) < 0)
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return (-1);
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mode = sb.st_mode;
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pe->pe_fsize = (size_t) sb.st_size;
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/* Reject unsupported file types. */
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if (!S_ISREG(mode) && !S_ISCHR(mode) && !S_ISFIFO(mode) &&
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!S_ISSOCK(mode)) {
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errno = EINVAL;
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return (-1);
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}
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/* Read/Write mode is not supported for non-regular file. */
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if (pe->pe_cmd == PE_C_RDWR && !S_ISREG(mode)) {
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errno = EINVAL;
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return (-1);
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}
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/* The minimal file should at least contain a COFF header. */
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if (S_ISREG(mode) && pe->pe_fsize < sizeof(PE_CoffHdr)) {
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errno = ENOENT;
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return (-1);
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}
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/*
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* Search for MS-DOS header or COFF header.
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*/
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if (read(pe->pe_fd, magic, 2) != 2) {
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errno = EIO;
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return (-1);
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}
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if (magic[0] == 'M' && magic[1] == 'Z') {
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pe->pe_obj = PE_O_PE32;
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if (read(pe->pe_fd, &magic[2], sizeof(PE_DosHdr) - 2) !=
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(ssize_t) sizeof(PE_DosHdr) - 2) {
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errno = EIO;
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return (-1);
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}
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return (libpe_parse_msdos_header(pe, magic));
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} else if (magic[0] == 'P' && magic[1] == 'E') {
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if (read(pe->pe_fd, magic, 2) != 2) {
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errno = EIO;
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return (-1);
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}
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if (magic[0] == '\0' && magic[1] == '\0') {
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pe->pe_obj = PE_O_PE32;
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if (read(pe->pe_fd, magic, sizeof(PE_CoffHdr)) !=
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(ssize_t) sizeof(PE_CoffHdr)) {
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errno = EIO;
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return (-1);
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}
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return (libpe_parse_coff_header(pe, magic));
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}
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errno = ENOENT;
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return (-1);
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} else {
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pe->pe_obj = PE_O_COFF;
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if (read(pe->pe_fd, &magic[2], sizeof(PE_CoffHdr) - 2) !=
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(ssize_t) sizeof(PE_CoffHdr) - 2) {
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errno = EIO;
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return (-1);
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}
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return (libpe_parse_coff_header(pe, magic));
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}
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}
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void
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libpe_release_object(PE *pe)
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{
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PE_Scn *ps, *_ps;
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if (pe->pe_dh)
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free(pe->pe_dh);
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if (pe->pe_rh) {
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free(pe->pe_rh->rh_compid);
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free(pe->pe_rh->rh_cnt);
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free(pe->pe_rh);
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}
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if (pe->pe_ch)
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free(pe->pe_ch);
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if (pe->pe_oh)
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free(pe->pe_oh);
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if (pe->pe_dd)
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free(pe->pe_dd);
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if (pe->pe_stub)
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free(pe->pe_stub);
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STAILQ_FOREACH_SAFE(ps, &pe->pe_scn, ps_next, _ps)
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libpe_release_scn(ps);
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free(pe);
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}
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