From e308faf24f68e262d92d294a01ddca7a17e76762 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Sun, 20 Jul 1997 14:56:40 +0000 Subject: Sync with Linux 2.1.46. --- arch/sparc/boot/Makefile | 15 ++++++- arch/sparc/boot/piggyback.c | 100 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 113 insertions(+), 2 deletions(-) create mode 100644 arch/sparc/boot/piggyback.c (limited to 'arch/sparc/boot') diff --git a/arch/sparc/boot/Makefile b/arch/sparc/boot/Makefile index b9d54e652..af462db3a 100644 --- a/arch/sparc/boot/Makefile +++ b/arch/sparc/boot/Makefile @@ -1,12 +1,23 @@ -# $Id: Makefile,v 1.3 1996/08/04 08:40:58 ecd Exp $ -# Makefile for the Sparc low level /boot module. +# $Id: Makefile,v 1.4 1997/07/11 11:05:18 jj Exp $ +# Makefile for the Sparc boot stuff. # # Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) +# Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + +ROOT_IMG =/usr/src/root.img +ELFTOAOUT =elftoaout all: boot boot: @echo "Nothing special to be done for 'boot' on Linux/SPARC." +tftpboot.img: piggyback + $(ELFTOAOUT) $(TOPDIR)/vmlinux -o tftpboot.img + ./piggyback tftpboot.img $(TOPDIR)/System.map $(ROOT_IMG) + +piggyback: piggyback.c + $(HOSTCC) $(HOSTCFLAGS) -o piggyback piggyback.c + dep: diff --git a/arch/sparc/boot/piggyback.c b/arch/sparc/boot/piggyback.c new file mode 100644 index 000000000..21a32932a --- /dev/null +++ b/arch/sparc/boot/piggyback.c @@ -0,0 +1,100 @@ +/* $Id: piggyback.c,v 1.1 1997/07/18 06:26:14 ralf Exp $ + Simple utility to make a single-image install kernel with initial ramdisk + for Sparc tftpbooting without need to set up nfs. + + Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + + 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. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Note: run this on an a.out kernel (use elftoaout for it), as PROM looks for a.out image onlly + usage: piggyback vmlinux System.map tail, where tail is gzipped fs of the initial ramdisk */ + +void die(char *str) +{ + perror (str); + exit(1); +} + +int main(int argc,char **argv) +{ + char buffer [1024], *q, *r; + unsigned int i, j, k, start, end, offset; + FILE *map; + struct stat s; + int image, tail; + + if (stat (argv[3], &s) < 0) die (argv[3]); + map = fopen (argv[2], "r"); + if (!map) die(argv[2]); + while (fgets (buffer, 1024, map)) { + if (!strcmp (buffer + 11, "start\n")) + start = strtoul (buffer, NULL, 16); + else if (!strcmp (buffer + 11, "end\n")) + end = strtoul (buffer, NULL, 16); + } + fclose (map); + if ((image = open(argv[1],O_RDWR)) < 0) die(argv[1]); + if (read(image,buffer,512) != 512) die(argv[1]); + if (!memcmp (buffer, "\177ELF", 4)) { + unsigned int *p = (unsigned int *)(buffer + *(unsigned int *)(buffer + 28)); + + i = p[1] + *(unsigned int *)(buffer + 24) - p[2]; + if (lseek(image,i,0) < 0) die("lseek"); + if (read(image,buffer,512) != 512) die(argv[1]); + j = 0; + } else if (*(unsigned int *)buffer == 0x01030107) { + i = j = 32; + } else { + fprintf (stderr, "Not ELF nor a.out. Don't blame me.\n"); + exit(1); + } + k = i; + i += ((*(unsigned short *)(buffer + j + 2))<<2) - 512; + if (lseek(image,i,0) < 0) die("lseek"); + if (read(image,buffer,1024) != 1024) die(argv[1]); + for (q = buffer, r = q + 512; q < r; q += 4) { + if (*q == 'H' && q[1] == 'd' && q[2] == 'r' && q[3] == 'S') + break; + } + if (q == r) { + fprintf (stderr, "Couldn't find headers signature in the kernel.\n"); + exit(1); + } + offset = i + (q - buffer) + 10; + if (lseek(image, offset, 0) < 0) die ("lseek"); + *(unsigned *)buffer = 0; + *(unsigned *)(buffer + 4) = 0x01000000; + *(unsigned *)(buffer + 8) = ((end + 32 + 4095) & ~4095); + *(unsigned *)(buffer + 12) = s.st_size; + if (write(image,buffer+2,14) != 14) die (argv[1]); + if (lseek(image, k - start + ((end + 32 + 4095) & ~4095), 0) < 0) die ("lseek"); + if ((tail = open(argv[3],O_RDONLY)) < 0) die(argv[3]); + while ((i = read (tail,buffer,1024)) > 0) + if (write(image,buffer,i) != i) die (argv[1]); + if (close(image) < 0) die("close"); + if (close(tail) < 0) die("close"); + return 0; +} -- cgit v1.2.3