freebsd-dev/contrib/elftoolchain/libpe/libpe_utils.c
Ed Maste 839529caa9 Update ELF Tool Chain to upstream rev 3400
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
2016-02-12 20:54:02 +00:00

70 lines
2.0 KiB
C

/*-
* Copyright (c) 2016 Kai Wang
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "_libpe.h"
ELFTC_VCSID("$Id: libpe_utils.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
off_t
libpe_align(PE *pe, off_t off, size_t align)
{
off_t n;
assert(align > 0 && (align & (align - 1)) == 0);
n = roundup(off, align);
if (n > off) {
if (libpe_pad(pe, n - off) < 0)
return (-1);
}
return (n);
}
int
libpe_pad(PE *pe, size_t pad)
{
char tmp[128];
size_t s;
memset(tmp, 0, sizeof(tmp));
for (; pad > 0; pad -= s) {
s = pad > sizeof(tmp) ? sizeof(tmp) : pad;
if (write(pe->pe_fd, tmp, s) != (ssize_t) s) {
errno = EIO;
return (-1);
}
}
return (0);
}