diff options
Diffstat (limited to 'kexec/arch/i386/kexec-beoboot-x86.c')
| -rw-r--r-- | kexec/arch/i386/kexec-beoboot-x86.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/kexec/arch/i386/kexec-beoboot-x86.c b/kexec/arch/i386/kexec-beoboot-x86.c new file mode 100644 index 0000000..d949ab8 --- /dev/null +++ b/kexec/arch/i386/kexec-beoboot-x86.c @@ -0,0 +1,132 @@ +/*------------------------------------------------------------ -*- C -*- + * Eric Biederman <ebiederman@xmission.com> + * Erik Arjan Hendriks <hendriks@lanl.gov> + * + * 14 December 2004 + * This file is a derivative of the beoboot image loader, modified + * to work with kexec. + * + * This version is derivative from the orignal mkbootimg.c which is + * Copyright (C) 2000 Scyld Computing Corporation + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + + * + *--------------------------------------------------------------------*/ + +#define _GNU_SOURCE +#include <stdio.h> +#include <stdint.h> +#include <string.h> +#include <getopt.h> +#include <x86/x86-linux.h> +#include <boot/beoboot.h> +#include "../../kexec.h" +#include "kexec-x86.h" +#include <arch/options.h> + +int beoboot_probe(const char *buf, off_t len) +{ + struct beoboot_header bb_header; + const char *cmdline, *kernel; + int result; + if ((uintmax_t)len < (uintmax_t)sizeof(bb_header)) { + return -1; + } + memcpy(&bb_header, buf, sizeof(bb_header)); + if (memcmp(bb_header.magic, BEOBOOT_MAGIC, 4) != 0) { + return -1; + } + if (bb_header.arch != BEOBOOT_ARCH) { + return -1; + } + /* Make certain a bzImage is packed into there. + */ + cmdline = buf + sizeof(bb_header); + kernel = cmdline + bb_header.cmdline_size; + result = bzImage_probe(kernel, bb_header.kernel_size); + + return result; +} + +void beoboot_usage(void) +{ + printf( " --real-mode Use the kernels real mode entry point.\n" + ); + + /* No parameters are parsed */ +} + +#define SETUP_BASE 0x90000 +#define KERN32_BASE 0x100000 /* 1MB */ +#define INITRD_BASE 0x1000000 /* 16MB */ + +int beoboot_load(int argc, char **argv, const char *buf, off_t UNUSED(len), + struct kexec_info *info) +{ + struct beoboot_header bb_header; + const char *command_line, *kernel, *initrd; + + int real_mode_entry; + int opt; + int result; + + /* See options.h -- add any more there, too. */ + static const struct option options[] = { + KEXEC_ARCH_OPTIONS + { "real-mode", 0, 0, OPT_REAL_MODE }, + { 0, 0, 0, 0 }, + }; + static const char short_options[] = KEXEC_ARCH_OPT_STR ""; + + /* + * Parse the command line arguments + */ + real_mode_entry = 0; + while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) { + switch(opt) { + default: + /* Ignore core options */ + if (opt < OPT_ARCH_MAX) { + break; + } + case OPT_REAL_MODE: + real_mode_entry = 1; + break; + } + } + + + /* + * Parse the file + */ + memcpy(&bb_header, buf, sizeof(bb_header)); + command_line = buf + sizeof(bb_header); + kernel = command_line + bb_header.cmdline_size; + initrd = NULL; + if (bb_header.flags & BEOBOOT_INITRD_PRESENT) { + initrd = kernel + bb_header.kernel_size; + } + + result = do_bzImage_load(info, + kernel, bb_header.kernel_size, + command_line, bb_header.cmdline_size, + initrd, bb_header.initrd_size, + 0, 0, real_mode_entry); + + return result; +} + |