mirror of
https://git.proxmox.com/git/grub2
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286 lines
6.5 KiB
C
286 lines
6.5 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2004,2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <config-util.h>
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#include <time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <setjmp.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <grub/dl.h>
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#include <grub/mm.h>
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#include <grub/setjmp.h>
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#include <grub/fs.h>
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#include <grub/emu/hostdisk.h>
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#include <grub/time.h>
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#include <grub/emu/console.h>
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#include <grub/emu/misc.h>
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#include <grub/kernel.h>
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#include <grub/normal.h>
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#include <grub/emu/getroot.h>
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#include <grub/env.h>
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#include <grub/partition.h>
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#include <grub/i18n.h>
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#include <grub/loader.h>
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#include <grub/util/misc.h>
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#pragma GCC diagnostic ignored "-Wmissing-prototypes"
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#include "progname.h"
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#include <argp.h>
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#define ENABLE_RELOCATABLE 0
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/* Used for going back to the main function. */
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static jmp_buf main_env;
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/* Store the prefix specified by an argument. */
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static char *root_dev = NULL, *dir = NULL;
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grub_addr_t grub_modbase = 0;
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void
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grub_reboot (void)
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{
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longjmp (main_env, 1);
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}
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void
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grub_exit (void)
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{
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grub_reboot ();
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}
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void
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grub_machine_init (void)
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{
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}
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void
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grub_machine_get_bootlocation (char **device, char **path)
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{
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*device = root_dev;
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*path = dir;
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}
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void
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grub_machine_fini (int flags)
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{
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if (flags & GRUB_LOADER_FLAG_NORETURN)
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grub_console_fini ();
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}
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#define OPT_MEMDISK 257
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static struct argp_option options[] = {
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{"root", 'r', N_("DEVICE_NAME"), 0, N_("Set root device."), 2},
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{"device-map", 'm', N_("FILE"), 0,
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/* TRANSLATORS: There are many devices in device map. */
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N_("use FILE as the device map [default=%s]"), 0},
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{"memdisk", OPT_MEMDISK, N_("FILE"), 0,
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/* TRANSLATORS: There are many devices in device map. */
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N_("use FILE as memdisk"), 0},
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{"directory", 'd', N_("DIR"), 0,
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N_("use GRUB files in the directory DIR [default=%s]"), 0},
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{"verbose", 'v', 0, 0, N_("print verbose messages."), 0},
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{"hold", 'H', N_("SECS"), OPTION_ARG_OPTIONAL, N_("wait until a debugger will attach"), 0},
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{ 0, 0, 0, 0, 0, 0 }
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};
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#pragma GCC diagnostic ignored "-Wformat-nonliteral"
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static char *
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help_filter (int key, const char *text, void *input __attribute__ ((unused)))
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{
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switch (key)
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{
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case 'd':
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return xasprintf (text, DEFAULT_DIRECTORY);
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case 'm':
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return xasprintf (text, DEFAULT_DEVICE_MAP);
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default:
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return (char *) text;
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}
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}
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#pragma GCC diagnostic error "-Wformat-nonliteral"
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struct arguments
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{
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const char *dev_map;
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const char *mem_disk;
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int hold;
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};
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static error_t
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argp_parser (int key, char *arg, struct argp_state *state)
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{
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/* Get the input argument from argp_parse, which we
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know is a pointer to our arguments structure. */
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struct arguments *arguments = state->input;
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switch (key)
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{
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case OPT_MEMDISK:
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arguments->mem_disk = arg;
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break;
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case 'r':
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free (root_dev);
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root_dev = xstrdup (arg);
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break;
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case 'd':
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free (dir);
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dir = xstrdup (arg);
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break;
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case 'm':
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arguments->dev_map = arg;
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break;
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case 'H':
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arguments->hold = (arg ? atoi (arg) : -1);
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break;
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case 'v':
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verbosity++;
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break;
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case ARGP_KEY_ARG:
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{
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/* Too many arguments. */
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fprintf (stderr, _("Unknown extra argument `%s'."), arg);
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fprintf (stderr, "\n");
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argp_usage (state);
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}
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break;
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default:
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return ARGP_ERR_UNKNOWN;
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}
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return 0;
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}
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static struct argp argp = {
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options, argp_parser, NULL,
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N_("GRUB emulator."),
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NULL, help_filter, NULL
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};
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#pragma GCC diagnostic ignored "-Wmissing-prototypes"
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int
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main (int argc, char *argv[])
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{
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struct arguments arguments =
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{
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.dev_map = DEFAULT_DEVICE_MAP,
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.hold = 0,
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.mem_disk = 0,
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};
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volatile int hold = 0;
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size_t total_module_size = sizeof (struct grub_module_info), memdisk_size = 0;
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struct grub_module_info *modinfo;
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void *mods;
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grub_util_host_init (&argc, &argv);
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dir = xstrdup (DEFAULT_DIRECTORY);
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if (argp_parse (&argp, argc, argv, 0, 0, &arguments) != 0)
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{
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fprintf (stderr, "%s", _("Error in parsing command line arguments\n"));
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exit(1);
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}
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if (arguments.mem_disk)
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{
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memdisk_size = ALIGN_UP(grub_util_get_image_size (arguments.mem_disk), 512);
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total_module_size += memdisk_size + sizeof (struct grub_module_header);
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}
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mods = xmalloc (total_module_size);
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modinfo = grub_memset (mods, 0, total_module_size);
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mods = (char *) (modinfo + 1);
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modinfo->magic = GRUB_MODULE_MAGIC;
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modinfo->offset = sizeof (struct grub_module_info);
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modinfo->size = total_module_size;
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if (arguments.mem_disk)
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{
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struct grub_module_header *header = (struct grub_module_header *) mods;
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header->type = OBJ_TYPE_MEMDISK;
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header->size = memdisk_size + sizeof (*header);
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mods = header + 1;
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grub_util_load_image (arguments.mem_disk, mods);
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mods = (char *) mods + memdisk_size;
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}
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grub_modbase = (grub_addr_t) modinfo;
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hold = arguments.hold;
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/* Wait until the ARGS.HOLD variable is cleared by an attached debugger. */
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if (hold && verbosity > 0)
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/* TRANSLATORS: In this case GRUB tells user what he has to do. */
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printf (_("Run `gdb %s %d', and set ARGS.HOLD to zero.\n"),
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program_name, (int) getpid ());
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while (hold)
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{
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if (hold > 0)
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hold--;
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sleep (1);
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}
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signal (SIGINT, SIG_IGN);
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grub_console_init ();
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grub_host_init ();
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/* XXX: This is a bit unportable. */
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grub_util_biosdisk_init (arguments.dev_map);
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grub_init_all ();
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grub_hostfs_init ();
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/* Make sure that there is a root device. */
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if (! root_dev)
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root_dev = grub_strdup ("host");
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dir = xstrdup (dir);
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/* Start GRUB! */
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if (setjmp (main_env) == 0)
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grub_main ();
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grub_fini_all ();
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grub_hostfs_fini ();
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grub_host_fini ();
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grub_machine_fini (GRUB_LOADER_FLAG_NORETURN);
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return 0;
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}
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