diff options
author | Paul Mackerras <paulus@samba.org> | 2006-01-14 05:04:06 +0100 |
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committer | Paul Mackerras <paulus@samba.org> | 2006-01-14 05:04:06 +0100 |
commit | 66a45dd3620ee5f913ba1af3d2dca8b9bdfa2b96 (patch) | |
tree | f98b25a1004d6e6bc84244186db61e76d5b2fe1c /arch/powerpc/boot/hack-coff.c | |
parent | [PATCH] powerpc: macio-adb build fix (diff) | |
download | linux-66a45dd3620ee5f913ba1af3d2dca8b9bdfa2b96.tar.xz linux-66a45dd3620ee5f913ba1af3d2dca8b9bdfa2b96.zip |
powerpc: Make COFF zImages for old 32-bit powermacs
This adds code to build zImage.coff and/or zImage.initrd.coff when
CONFIG_PPC32 and CONFIG_PPC_PMAC are defined. It also restructures
the OF client code and adds some workarounds for OF quirks on the
older machines.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/boot/hack-coff.c')
-rw-r--r-- | arch/powerpc/boot/hack-coff.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/powerpc/boot/hack-coff.c b/arch/powerpc/boot/hack-coff.c new file mode 100644 index 000000000000..5e5a6573a1ef --- /dev/null +++ b/arch/powerpc/boot/hack-coff.c @@ -0,0 +1,84 @@ +/* + * hack-coff.c - hack the header of an xcoff file to fill in + * a few fields needed by the Open Firmware xcoff loader on + * Power Macs but not initialized by objcopy. + * + * Copyright (C) Paul Mackerras 1997. + * + * 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. + */ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <string.h> +#include "rs6000.h" + +#define AOUT_MAGIC 0x010b + +#define get_16be(x) ((((unsigned char *)(x))[0] << 8) \ + + ((unsigned char *)(x))[1]) +#define put_16be(x, v) (((unsigned char *)(x))[0] = (v) >> 8, \ + ((unsigned char *)(x))[1] = (v) & 0xff) +#define get_32be(x) ((((unsigned char *)(x))[0] << 24) \ + + (((unsigned char *)(x))[1] << 16) \ + + (((unsigned char *)(x))[2] << 8) \ + + ((unsigned char *)(x))[3]) + +int +main(int ac, char **av) +{ + int fd; + int i, nsect; + int aoutsz; + struct external_filehdr fhdr; + AOUTHDR aout; + struct external_scnhdr shdr; + + if (ac != 2) { + fprintf(stderr, "Usage: hack-coff coff-file\n"); + exit(1); + } + if ((fd = open(av[1], 2)) == -1) { + perror(av[2]); + exit(1); + } + if (read(fd, &fhdr, sizeof(fhdr)) != sizeof(fhdr)) + goto readerr; + i = get_16be(fhdr.f_magic); + if (i != U802TOCMAGIC && i != U802WRMAGIC && i != U802ROMAGIC) { + fprintf(stderr, "%s: not an xcoff file\n", av[1]); + exit(1); + } + aoutsz = get_16be(fhdr.f_opthdr); + if (read(fd, &aout, aoutsz) != aoutsz) + goto readerr; + nsect = get_16be(fhdr.f_nscns); + for (i = 0; i < nsect; ++i) { + if (read(fd, &shdr, sizeof(shdr)) != sizeof(shdr)) + goto readerr; + if (strcmp(shdr.s_name, ".text") == 0) { + put_16be(aout.o_snentry, i+1); + put_16be(aout.o_sntext, i+1); + } else if (strcmp(shdr.s_name, ".data") == 0) { + put_16be(aout.o_sndata, i+1); + } else if (strcmp(shdr.s_name, ".bss") == 0) { + put_16be(aout.o_snbss, i+1); + } + } + put_16be(aout.magic, AOUT_MAGIC); + if (lseek(fd, (long) sizeof(struct external_filehdr), 0) == -1 + || write(fd, &aout, aoutsz) != aoutsz) { + fprintf(stderr, "%s: write error\n", av[1]); + exit(1); + } + close(fd); + exit(0); + +readerr: + fprintf(stderr, "%s: read error or file too short\n", av[1]); + exit(1); +} |