diff options
Diffstat (limited to 'grub-core/kern/emu/main.c')
| -rw-r--r-- | grub-core/kern/emu/main.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/grub-core/kern/emu/main.c b/grub-core/kern/emu/main.c new file mode 100644 index 0000000..0a76459 --- /dev/null +++ b/grub-core/kern/emu/main.c @@ -0,0 +1,259 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2003,2004,2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc. + * + * GRUB 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 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <time.h> +#include <stdio.h> +#include <stdlib.h> +#include <setjmp.h> +#include <sys/stat.h> +#include <string.h> +#include <signal.h> +#include <sys/types.h> +#include <unistd.h> + +#include <grub/dl.h> +#include <grub/mm.h> +#include <grub/setjmp.h> +#include <grub/fs.h> +#include <grub/emu/hostdisk.h> +#include <grub/time.h> +#include <grub/emu/console.h> +#include <grub/emu/misc.h> +#include <grub/kernel.h> +#include <grub/normal.h> +#include <grub/emu/getroot.h> +#include <grub/env.h> +#include <grub/partition.h> +#include <grub/i18n.h> + +#include "progname.h" + +#define ENABLE_RELOCATABLE 0 + +/* Used for going back to the main function. */ +static jmp_buf main_env; + +/* Store the prefix specified by an argument. */ +static char *prefix = NULL; + +int grub_no_autoload; + +grub_addr_t +grub_arch_modules_addr (void) +{ + return 0; +} + +void +grub_reboot (void) +{ + longjmp (main_env, 1); +} + +void +grub_machine_init (void) +{ +} + +void +grub_machine_set_prefix (void) +{ + grub_env_set ("prefix", prefix); + free (prefix); + prefix = 0; +} + +void +grub_machine_fini (void) +{ + grub_console_fini (); +} + + + +static struct option options[] = + { + {"root-device", required_argument, 0, 'r'}, + {"device-map", required_argument, 0, 'm'}, + {"directory", required_argument, 0, 'd'}, + {"hold", optional_argument, 0, 'H'}, + {"help", no_argument, 0, 'h'}, + {"version", no_argument, 0, 'V'}, + {"verbose", no_argument, 0, 'v'}, + { 0, 0, 0, 0 } + }; + +static int +usage (int status) +{ + if (status) + fprintf (stderr, + "Try `%s --help' for more information.\n", program_name); + else + printf ( + "Usage: %s [OPTION]...\n" + "\n" + "GRUB emulator.\n" + "\n" + " -r, --root-device=DEV use DEV as the root device [default=guessed]\n" + " -m, --device-map=FILE use FILE as the device map [default=%s]\n" + " -d, --directory=DIR use GRUB files in the directory DIR [default=%s]\n" + " -v, --verbose print verbose messages\n" + " -H, --hold[=SECONDS] wait until a debugger will attach\n" + " -h, --help display this message and exit\n" + " -V, --version print version information and exit\n" + "\n" + "Report bugs to <%s>.\n", program_name, DEFAULT_DEVICE_MAP, DEFAULT_DIRECTORY, PACKAGE_BUGREPORT); + return status; +} + + +void grub_hostfs_init (void); +void grub_hostfs_fini (void); +void grub_host_init (void); +void grub_host_fini (void); +void grub_emu_init (void); + +int +main (int argc, char *argv[]) +{ + char *root_dev = 0; + char *dir = DEFAULT_DIRECTORY; + char *dev_map = DEFAULT_DEVICE_MAP; + volatile int hold = 0; + int opt; + + set_program_name (argv[0]); + + while ((opt = getopt_long (argc, argv, "r:d:m:vH:hV", options, 0)) != -1) + switch (opt) + { + case 'r': + root_dev = optarg; + break; + case 'd': + dir = optarg; + break; + case 'm': + dev_map = optarg; + break; + case 'v': + verbosity++; + break; + case 'H': + hold = (optarg ? atoi (optarg) : -1); + break; + case 'h': + return usage (0); + case 'V': + printf ("%s (%s) %s\n", program_name, PACKAGE_NAME, PACKAGE_VERSION); + return 0; + default: + return usage (1); + } + + if (optind < argc) + { + fprintf (stderr, "Unknown extra argument `%s'.\n", argv[optind]); + return usage (1); + } + + /* Wait until the ARGS.HOLD variable is cleared by an attached debugger. */ + if (hold && verbosity > 0) + printf ("Run \"gdb %s %d\", and set ARGS.HOLD to zero.\n", + program_name, (int) getpid ()); + while (hold) + { + if (hold > 0) + hold--; + + sleep (1); + } + + signal (SIGINT, SIG_IGN); + grub_emu_init (); + grub_console_init (); + grub_host_init (); + + /* XXX: This is a bit unportable. */ + grub_util_biosdisk_init (dev_map); + + grub_init_all (); + + grub_hostfs_init (); + + grub_emu_post_init (); + + /* Make sure that there is a root device. */ + if (! root_dev) + { + char *device_name = grub_guess_root_device (dir); + if (! device_name) + grub_util_error ("cannot find a device for %s", dir); + + root_dev = grub_util_get_grub_dev (device_name); + if (! root_dev) + { + grub_util_info ("guessing the root device failed, because of `%s'", + grub_errmsg); + grub_util_error ("cannot guess the root device. Specify the option `--root-device'"); + } + } + + if (strcmp (root_dev, "host") == 0) + dir = xstrdup (dir); + else + dir = grub_make_system_path_relative_to_its_root (dir); + prefix = xmalloc (strlen (root_dev) + 2 + strlen (dir) + 1); + sprintf (prefix, "(%s)%s", root_dev, dir); + free (dir); + + /* Start GRUB! */ + if (setjmp (main_env) == 0) + grub_main (); + + grub_fini_all (); + grub_hostfs_fini (); + grub_host_fini (); + + grub_machine_fini (); + + return 0; +} + +#ifdef __MINGW32__ + +void +grub_millisleep (grub_uint32_t ms) +{ + Sleep (ms); +} + +#else + +void +grub_millisleep (grub_uint32_t ms) +{ + struct timespec ts; + + ts.tv_sec = ms / 1000; + ts.tv_nsec = (ms % 1000) * 1000000; + nanosleep (&ts, NULL); +} + +#endif |