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2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* hack-coff.c - hack the header of an xcoff file to fill in
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* a few fields needed by the Open Firmware xcoff loader on
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* Power Macs but not initialized by objcopy.
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*
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* Copyright (C) Paul Mackerras 1997.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include "rs6000.h"
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#define AOUT_MAGIC 0x010b
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#define get_16be(x) ((((unsigned char *)(x))[0] << 8) \
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+ ((unsigned char *)(x))[1])
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#define put_16be(x, v) (((unsigned char *)(x))[0] = (v) >> 8, \
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((unsigned char *)(x))[1] = (v) & 0xff)
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#define get_32be(x) ((((unsigned char *)(x))[0] << 24) \
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+ (((unsigned char *)(x))[1] << 16) \
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+ (((unsigned char *)(x))[2] << 8) \
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+ ((unsigned char *)(x))[3])
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int
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main(int ac, char **av)
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{
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int fd;
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int i, nsect;
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int aoutsz;
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struct external_filehdr fhdr;
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AOUTHDR aout;
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struct external_scnhdr shdr;
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if (ac != 2) {
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fprintf(stderr, "Usage: hack-coff coff-file\n");
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exit(1);
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}
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if ((fd = open(av[1], 2)) == -1) {
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perror(av[2]);
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exit(1);
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}
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if (read(fd, &fhdr, sizeof(fhdr)) != sizeof(fhdr))
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goto readerr;
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i = get_16be(fhdr.f_magic);
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if (i != U802TOCMAGIC && i != U802WRMAGIC && i != U802ROMAGIC) {
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fprintf(stderr, "%s: not an xcoff file\n", av[1]);
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exit(1);
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}
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aoutsz = get_16be(fhdr.f_opthdr);
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if (read(fd, &aout, aoutsz) != aoutsz)
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goto readerr;
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nsect = get_16be(fhdr.f_nscns);
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for (i = 0; i < nsect; ++i) {
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if (read(fd, &shdr, sizeof(shdr)) != sizeof(shdr))
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goto readerr;
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if (strcmp(shdr.s_name, ".text") == 0) {
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put_16be(aout.o_snentry, i+1);
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put_16be(aout.o_sntext, i+1);
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} else if (strcmp(shdr.s_name, ".data") == 0) {
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put_16be(aout.o_sndata, i+1);
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} else if (strcmp(shdr.s_name, ".bss") == 0) {
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put_16be(aout.o_snbss, i+1);
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}
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}
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put_16be(aout.magic, AOUT_MAGIC);
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if (lseek(fd, (long) sizeof(struct external_filehdr), 0) == -1
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|| write(fd, &aout, aoutsz) != aoutsz) {
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fprintf(stderr, "%s: write error\n", av[1]);
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exit(1);
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}
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close(fd);
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exit(0);
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readerr:
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fprintf(stderr, "%s: read error or file too short\n", av[1]);
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exit(1);
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}
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