Adding upstream version 2.06.upstream/2.06upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

11 files changed, 1716 insertions, 0 deletions

diff --git a/grub-core/kern/emu/argp_common.c b/grub-core/kern/emu/argp_common.c
new file mode 100644
index 0000000..1668858
--- /dev/null
+++ b/grub-core/kern/emu/argp_common.c
@@ -0,0 +1,41 @@
+/* grub-setup.c - make GRUB usable */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012  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 <config.h>
+#include <config-util.h>
+
+#pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#pragma GCC diagnostic ignored "-Wmissing-declarations"
+
+#define _GNU_SOURCE	1
+#include <stdlib.h>
+#include <unistd.h>
+#include <progname.h>
+#include <argp.h>
+
+/* Print the version information.  */
+static void
+print_version (FILE *stream, struct argp_state *state)
+{
+  fprintf (stream, "%s (%s) %s\n", program_name, PACKAGE_NAME, PACKAGE_VERSION);
+}
+void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
+
+/* Set the bug report address */
+const char *argp_program_bug_address = "<"PACKAGE_BUGREPORT">";
diff --git a/grub-core/kern/emu/cache.c b/grub-core/kern/emu/cache.c
new file mode 100644
index 0000000..113682c
--- /dev/null
+++ b/grub-core/kern/emu/cache.c
@@ -0,0 +1,35 @@
+#ifndef GRUB_MACHINE_EMU
+#error "This source is only meant for grub-emu platform"
+#endif
+
+#include <grub/cache.h>
+
+#if defined(__ia64__)
+#include "../ia64/cache.c"
+#elif defined (__arm__) || defined (__aarch64__)
+
+void __clear_cache (void *beg, void *end);
+
+void
+grub_arch_sync_caches (void *address, grub_size_t len)
+{
+  __clear_cache (address, (char *) address + len);
+}
+
+#elif defined (__mips__)
+void _flush_cache (void *address, grub_size_t len, int type);
+
+void
+grub_arch_sync_caches (void *address, grub_size_t len)
+{
+  return _flush_cache (address, len, 0);
+}
+
+#elif defined(__riscv)
+void
+grub_arch_sync_caches (void *address, grub_size_t len)
+{
+}
+
+#endif
+
diff --git a/grub-core/kern/emu/cache_s.S b/grub-core/kern/emu/cache_s.S
new file mode 100644
index 0000000..2245cdd
--- /dev/null
+++ b/grub-core/kern/emu/cache_s.S
@@ -0,0 +1,15 @@
+#ifndef GRUB_MACHINE_EMU
+#error "This source is only meant for grub-emu platform"
+#endif
+
+#if defined(__i386__) || defined(__x86_64__)
+/* Nothing is necessary.  */
+#elif defined(__sparc__)
+#include "../sparc64/cache.S"
+#elif defined(__powerpc__)
+#include "../powerpc/cache.S"
+#elif defined(__ia64__) || defined(__arm__) || defined(__aarch64__) || \
+      defined(__mips__) || defined(__riscv)
+#else
+#error "No target cpu type is defined"
+#endif
diff --git a/grub-core/kern/emu/full.c b/grub-core/kern/emu/full.c
new file mode 100644
index 0000000..e8d63b1
--- /dev/null
+++ b/grub-core/kern/emu/full.c
@@ -0,0 +1,69 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 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 <config.h>
+#include <grub/dl.h>
+#include <grub/env.h>
+#include <grub/kernel.h>
+#include <grub/misc.h>
+#include <grub/emu/misc.h>
+#include <grub/disk.h>
+
+const int grub_no_modules = 1;
+
+void
+grub_register_exported_symbols (void)
+{
+}
+
+grub_err_t
+grub_arch_dl_check_header (void *ehdr)
+{
+  (void) ehdr;
+  return GRUB_ERR_BAD_MODULE;
+}
+
+grub_err_t
+grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
+			       Elf_Shdr *s, grub_dl_segment_t seg)
+{
+  (void) mod;
+  (void) ehdr;
+  (void) s;
+  (void) seg;
+  return GRUB_ERR_BAD_MODULE;
+}
+
+#if !defined (__i386__) && !defined (__x86_64__)
+grub_err_t
+grub_arch_dl_get_tramp_got_size (const void *ehdr __attribute__ ((unused)),
+			         grub_size_t *tramp, grub_size_t *got)
+{
+  *tramp = 0;
+  *got = 0;
+  return GRUB_ERR_BAD_MODULE;
+}
+#endif
+
+#ifdef GRUB_LINKER_HAVE_INIT
+void
+grub_arch_dl_init_linker (void)
+{
+}
+#endif
+
diff --git a/grub-core/kern/emu/hostdisk.c b/grub-core/kern/emu/hostdisk.c
new file mode 100644
index 0000000..d975265
--- /dev/null
+++ b/grub-core/kern/emu/hostdisk.c
@@ -0,0 +1,686 @@
+/* hostdisk.c - emulate biosdisk */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2004,2006,2007,2008,2009,2010  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 <config-util.h>
+
+#include <grub/disk.h>
+#include <grub/partition.h>
+#include <grub/msdos_partition.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/emu/misc.h>
+#include <grub/emu/hostdisk.h>
+#include <grub/emu/getroot.h>
+#include <grub/misc.h>
+#include <grub/i18n.h>
+#include <grub/list.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <assert.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <limits.h>
+
+#ifdef __linux__
+# include <sys/ioctl.h>         /* ioctl */
+# include <sys/mount.h>
+# ifndef BLKFLSBUF
+#  define BLKFLSBUF     _IO (0x12,97)   /* flush buffer cache */
+# endif /* ! BLKFLSBUF */
+#endif /* __linux__ */
+
+static struct
+{
+  char *drive;
+  char *device;
+  int device_map;
+} map[256];
+
+static int
+unescape_cmp (const char *a, const char *b_escaped)
+{
+  while (*a || *b_escaped)
+    {
+      if (*b_escaped == '\\' && b_escaped[1] != 0)
+	b_escaped++;
+      if (*a < *b_escaped)
+	return -1;
+      if (*a > *b_escaped)
+	return +1;
+      a++;
+      b_escaped++;
+    }
+  if (*a)
+    return +1;
+  if (*b_escaped)
+    return -1;
+  return 0;
+}
+
+static int
+find_grub_drive (const char *name)
+{
+  unsigned int i;
+
+  if (name)
+    {
+      for (i = 0; i < ARRAY_SIZE (map); i++)
+	if (map[i].drive && unescape_cmp (map[i].drive, name) == 0)
+	  return i;
+    }
+
+  return -1;
+}
+
+static int
+find_free_slot (void)
+{
+  unsigned int i;
+
+  for (i = 0; i < ARRAY_SIZE (map); i++)
+    if (! map[i].drive)
+      return i;
+
+  return -1;
+}
+
+static int
+grub_util_biosdisk_iterate (grub_disk_dev_iterate_hook_t hook, void *hook_data,
+			    grub_disk_pull_t pull)
+{
+  unsigned i;
+
+  if (pull != GRUB_DISK_PULL_NONE)
+    return 0;
+
+  for (i = 0; i < ARRAY_SIZE (map); i++)
+    if (map[i].drive && hook (map[i].drive, hook_data))
+      return 1;
+
+  return 0;
+}
+
+static grub_err_t
+grub_util_biosdisk_open (const char *name, grub_disk_t disk)
+{
+  int drive;
+  struct grub_util_hostdisk_data *data;
+
+  drive = find_grub_drive (name);
+  grub_util_info ("drive = %d", drive);
+  if (drive < 0)
+    return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
+		       "no mapping exists for `%s'", name);
+
+  disk->id = drive;
+  disk->data = data = xmalloc (sizeof (struct grub_util_hostdisk_data));
+  data->dev = NULL;
+  data->access_mode = 0;
+  data->fd = GRUB_UTIL_FD_INVALID;
+  data->is_disk = 0;
+  data->device_map = map[drive].device_map;
+
+  /* Get the size.  */
+  {
+    grub_util_fd_t fd;
+
+    fd = grub_util_fd_open (map[drive].device, GRUB_UTIL_FD_O_RDONLY);
+
+    if (!GRUB_UTIL_FD_IS_VALID(fd))
+      return grub_error (GRUB_ERR_UNKNOWN_DEVICE, N_("cannot open `%s': %s"),
+			 map[drive].device, grub_util_fd_strerror ());
+
+    disk->total_sectors = grub_util_get_fd_size (fd, map[drive].device,
+						 &disk->log_sector_size);
+    disk->total_sectors >>= disk->log_sector_size;
+    disk->max_agglomerate = GRUB_DISK_MAX_MAX_AGGLOMERATE;
+
+#if GRUB_UTIL_FD_STAT_IS_FUNCTIONAL
+    {
+      struct stat st;
+# if GRUB_DISK_DEVS_ARE_CHAR
+      if (fstat (fd, &st) >= 0 && S_ISCHR (st.st_mode))
+# else
+      if (fstat (fd, &st) >= 0 && S_ISBLK (st.st_mode))
+# endif
+	data->is_disk = 1;
+    }
+#endif
+
+    grub_util_fd_close (fd);
+
+    grub_util_info ("the size of %s is %" GRUB_HOST_PRIuLONG_LONG,
+		    name, (unsigned long long) disk->total_sectors);
+
+    return GRUB_ERR_NONE;
+  }
+}
+
+const char *
+grub_hostdisk_os_dev_to_grub_drive (const char *os_disk, int add)
+{
+  unsigned int i;
+  char *canon;
+
+  canon = grub_canonicalize_file_name (os_disk);
+  if (!canon)
+    canon = xstrdup (os_disk);
+
+  for (i = 0; i < ARRAY_SIZE (map); i++)
+    if (! map[i].device)
+      break;
+    else if (strcmp (map[i].device, canon) == 0)
+      {
+	free (canon);
+	return map[i].drive;
+      }
+
+  if (!add)
+    {
+      free (canon);
+      return NULL;
+    }
+
+  if (i == ARRAY_SIZE (map))
+    /* TRANSLATORS: it refers to the lack of free slots.  */
+    grub_util_error ("%s", _("device count exceeds limit"));
+
+  map[i].device = canon;
+  map[i].drive = xmalloc (sizeof ("hostdisk/") + strlen (os_disk));
+  strcpy (map[i].drive, "hostdisk/");
+  strcpy (map[i].drive + sizeof ("hostdisk/") - 1, os_disk);
+  map[i].device_map = 0;
+
+  grub_hostdisk_flush_initial_buffer (os_disk);
+
+  return map[i].drive;
+}
+
+#ifndef __linux__
+grub_util_fd_t
+grub_util_fd_open_device (const grub_disk_t disk, grub_disk_addr_t sector, int flags,
+			  grub_disk_addr_t *max)
+{
+  grub_util_fd_t fd;
+  struct grub_util_hostdisk_data *data = disk->data;
+
+  *max = ~0ULL;
+
+  flags |= GRUB_UTIL_FD_O_SYNC;
+
+  if (data->dev && strcmp (data->dev, map[disk->id].device) == 0 &&
+      data->access_mode == (flags & O_ACCMODE))
+    {
+      grub_dprintf ("hostdisk", "reusing open device `%s'\n", data->dev);
+      fd = data->fd;
+    }
+  else
+    {
+      free (data->dev);
+      data->dev = 0;
+      if (GRUB_UTIL_FD_IS_VALID(data->fd))
+	{
+	    if (data->access_mode == O_RDWR || data->access_mode == O_WRONLY)
+	      grub_util_fd_sync (data->fd);
+	    grub_util_fd_close (data->fd);
+	    data->fd = GRUB_UTIL_FD_INVALID;
+	}
+
+      fd = grub_util_fd_open (map[disk->id].device, flags);
+      if (GRUB_UTIL_FD_IS_VALID(fd))
+	{
+	  data->dev = xstrdup (map[disk->id].device);
+	  data->access_mode = (flags & O_ACCMODE);
+	  data->fd = fd;
+	}
+    }
+
+  if (!GRUB_UTIL_FD_IS_VALID(data->fd))
+    {
+      grub_error (GRUB_ERR_BAD_DEVICE, N_("cannot open `%s': %s"),
+		  map[disk->id].device, grub_util_fd_strerror ());
+      return GRUB_UTIL_FD_INVALID;
+    }
+
+  if (grub_util_fd_seek (fd, sector << disk->log_sector_size))
+    {
+      grub_util_fd_close (fd);
+      grub_error (GRUB_ERR_BAD_DEVICE, N_("cannot seek `%s': %s"),
+		  map[disk->id].device, grub_util_fd_strerror ());
+
+      return GRUB_UTIL_FD_INVALID;
+    }
+
+  return fd;
+}
+#endif
+
+
+static grub_err_t
+grub_util_biosdisk_read (grub_disk_t disk, grub_disk_addr_t sector,
+			 grub_size_t size, char *buf)
+{
+  while (size)
+    {
+      grub_util_fd_t fd;
+      grub_disk_addr_t max = ~0ULL;
+      fd = grub_util_fd_open_device (disk, sector, GRUB_UTIL_FD_O_RDONLY, &max);
+      if (!GRUB_UTIL_FD_IS_VALID (fd))
+	return grub_errno;
+
+#ifdef __linux__
+      if (sector == 0)
+	/* Work around a bug in Linux ez remapping.  Linux remaps all
+	   sectors that are read together with the MBR in one read.  It
+	   should only remap the MBR, so we split the read in two
+	   parts. -jochen  */
+	max = 1;
+#endif /* __linux__ */
+
+      if (max > size)
+	max = size;
+
+      if (grub_util_fd_read (fd, buf, max << disk->log_sector_size)
+	  != (ssize_t) (max << disk->log_sector_size))
+	return grub_error (GRUB_ERR_READ_ERROR, N_("cannot read `%s': %s"),
+			   map[disk->id].device, grub_util_fd_strerror ());
+      size -= max;
+      buf += (max << disk->log_sector_size);
+      sector += max;
+    }
+  return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_util_biosdisk_write (grub_disk_t disk, grub_disk_addr_t sector,
+			  grub_size_t size, const char *buf)
+{
+  while (size)
+    {
+      grub_util_fd_t fd;
+      grub_disk_addr_t max = ~0ULL;
+      fd = grub_util_fd_open_device (disk, sector, GRUB_UTIL_FD_O_WRONLY, &max);
+      if (!GRUB_UTIL_FD_IS_VALID (fd))
+	return grub_errno;
+
+#ifdef __linux__
+      if (sector == 0)
+	/* Work around a bug in Linux ez remapping.  Linux remaps all
+	   sectors that are write together with the MBR in one write.  It
+	   should only remap the MBR, so we split the write in two
+	   parts. -jochen  */
+	max = 1;
+#endif /* __linux__ */
+
+      if (max > size)
+	max = size;
+
+      if (grub_util_fd_write (fd, buf, max << disk->log_sector_size)
+	  != (ssize_t) (max << disk->log_sector_size))
+	return grub_error (GRUB_ERR_WRITE_ERROR, N_("cannot write to `%s': %s"),
+			   map[disk->id].device, grub_util_fd_strerror ());
+      size -= max;
+      buf += (max << disk->log_sector_size);
+    }
+  return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_util_biosdisk_flush (struct grub_disk *disk)
+{
+  struct grub_util_hostdisk_data *data = disk->data;
+
+  if (disk->dev->id != GRUB_DISK_DEVICE_BIOSDISK_ID)
+    return GRUB_ERR_NONE;
+  if (!GRUB_UTIL_FD_IS_VALID (data->fd))
+    {
+      grub_disk_addr_t max;
+      data->fd = grub_util_fd_open_device (disk, 0, GRUB_UTIL_FD_O_RDONLY, &max);
+      if (!GRUB_UTIL_FD_IS_VALID (data->fd))
+	return grub_errno;
+    }
+  grub_util_fd_sync (data->fd);
+#ifdef __linux__
+  if (data->is_disk)
+    ioctl (data->fd, BLKFLSBUF, 0);
+#endif
+  return GRUB_ERR_NONE;
+}
+
+static void
+grub_util_biosdisk_close (struct grub_disk *disk)
+{
+  struct grub_util_hostdisk_data *data = disk->data;
+
+  free (data->dev);
+  if (GRUB_UTIL_FD_IS_VALID (data->fd))
+    {
+      if (data->access_mode == O_RDWR || data->access_mode == O_WRONLY)
+	grub_util_biosdisk_flush (disk);
+      grub_util_fd_close (data->fd);
+    }
+  free (data);
+}
+
+static struct grub_disk_dev grub_util_biosdisk_dev =
+  {
+    .name = "hostdisk",
+    .id = GRUB_DISK_DEVICE_HOSTDISK_ID,
+    .disk_iterate = grub_util_biosdisk_iterate,
+    .disk_open = grub_util_biosdisk_open,
+    .disk_close = grub_util_biosdisk_close,
+    .disk_read = grub_util_biosdisk_read,
+    .disk_write = grub_util_biosdisk_write,
+    .next = 0
+  };
+
+static int
+grub_util_check_file_presence (const char *p)
+{
+#if !GRUB_UTIL_FD_STAT_IS_FUNCTIONAL
+  grub_util_fd_t h;
+  h = grub_util_fd_open (p, GRUB_UTIL_FD_O_RDONLY);
+  if (!GRUB_UTIL_FD_IS_VALID(h))
+    return 0;
+  grub_util_fd_close (h);
+  return 1;
+#else
+  struct stat st;
+
+  if (stat (p, &st) == -1)
+    return 0;
+  return 1;
+#endif
+}
+
+static void
+read_device_map (const char *dev_map)
+{
+  FILE *fp;
+  char buf[1024];	/* XXX */
+  int lineno = 0;
+
+  if (!dev_map || dev_map[0] == '\0')
+    {
+      grub_util_info ("no device.map");
+      return;
+    }
+
+  fp = grub_util_fopen (dev_map, "r");
+  if (! fp)
+    {
+      grub_util_info (_("cannot open `%s': %s"), dev_map, strerror (errno));
+      return;
+    }
+
+  while (fgets (buf, sizeof (buf), fp))
+    {
+      char *p = buf;
+      char *e;
+      char *drive_e, *drive_p;
+      int drive;
+
+      lineno++;
+
+      /* Skip leading spaces.  */
+      while (*p && grub_isspace (*p))
+	p++;
+
+      /* If the first character is `#' or NUL, skip this line.  */
+      if (*p == '\0' || *p == '#')
+	continue;
+
+      if (*p != '(')
+	{
+	  char *tmp;
+	  tmp = xasprintf (_("missing `%c' symbol"), '(');
+	  grub_util_error ("%s:%d: %s", dev_map, lineno, tmp);
+	}
+
+      p++;
+      /* Find a free slot.  */
+      drive = find_free_slot ();
+      if (drive < 0)
+	grub_util_error ("%s:%d: %s", dev_map, lineno, _("device count exceeds limit"));
+
+      e = p;
+      p = strchr (p, ')');
+      if (! p)
+	{
+	  char *tmp;
+	  tmp = xasprintf (_("missing `%c' symbol"), ')');
+	  grub_util_error ("%s:%d: %s", dev_map, lineno, tmp);
+	}
+
+      map[drive].drive = 0;
+      if ((e[0] == 'f' || e[0] == 'h' || e[0] == 'c') && e[1] == 'd')
+	{
+	  char *ptr;
+	  for (ptr = e + 2; ptr < p; ptr++)
+	    if (!grub_isdigit (*ptr))
+	      break;
+	  if (ptr == p)
+	    {
+	      map[drive].drive = xmalloc (p - e + sizeof ('\0'));
+	      strncpy (map[drive].drive, e, p - e + sizeof ('\0'));
+	      map[drive].drive[p - e] = '\0';
+	    }
+	  if (*ptr == ',')
+	    {
+	      *p = 0;
+
+	      /* TRANSLATORS: Only one entry is ignored. However the suggestion
+		 is to correct/delete the whole file.
+		 device.map is a file indicating which
+		 devices are available at boot time. Fedora populated it with
+		 entries like (hd0,1) /dev/sda1 which would mean that every
+		 partition is a separate disk for BIOS. Such entries were
+		 inactive in GRUB due to its bug which is now gone. Without
+		 this additional check these entries would be harmful now.
+	      */
+	      grub_util_warn (_("the device.map entry `%s' is invalid. "
+				"Ignoring it. Please correct or "
+				"delete your device.map"), e);
+	      continue;
+	    }
+	}
+      drive_e = e;
+      drive_p = p;
+      map[drive].device_map = 1;
+
+      p++;
+      /* Skip leading spaces.  */
+      while (*p && grub_isspace (*p))
+	p++;
+
+      if (*p == '\0')
+	grub_util_error ("%s:%d: %s", dev_map, lineno, _("filename expected"));
+
+      /* NUL-terminate the filename.  */
+      e = p;
+      while (*e && ! grub_isspace (*e))
+	e++;
+      *e = '\0';
+
+      if (!grub_util_check_file_presence (p))
+	{
+	  free (map[drive].drive);
+	  map[drive].drive = NULL;
+	  grub_util_info ("Cannot stat `%s', skipping", p);
+	  continue;
+	}
+
+      /* On Linux, the devfs uses symbolic links horribly, and that
+	 confuses the interface very much, so use realpath to expand
+	 symbolic links.  */
+      map[drive].device = grub_canonicalize_file_name (p);
+      if (! map[drive].device)
+	map[drive].device = xstrdup (p);
+      
+      if (!map[drive].drive)
+	{
+	  char c;
+	  map[drive].drive = xmalloc (sizeof ("hostdisk/") + strlen (p));
+	  memcpy (map[drive].drive, "hostdisk/", sizeof ("hostdisk/") - 1);
+	  strcpy (map[drive].drive + sizeof ("hostdisk/") - 1, p);
+	  c = *drive_p;
+	  *drive_p = 0;
+	  /* TRANSLATORS: device.map is a filename. Not to be translated.
+	     device.map specifies disk correspondance overrides. Previously
+	     one could create any kind of device name with this. Due to
+	     some problems we decided to limit it to just a handful
+	     possibilities.  */
+	  grub_util_warn (_("the drive name `%s' in device.map is incorrect. "
+			    "Using %s instead. "
+			    "Please use the form [hfc]d[0-9]* "
+			    "(E.g. `hd0' or `cd')"),
+			  drive_e, map[drive].drive);
+	  *drive_p = c;
+	}
+
+      grub_util_info ("adding `%s' -> `%s' from device.map", map[drive].drive,
+		      map[drive].device);
+
+      grub_hostdisk_flush_initial_buffer (map[drive].device);
+    }
+
+  fclose (fp);
+}
+
+void
+grub_util_biosdisk_init (const char *dev_map)
+{
+  read_device_map (dev_map);
+  grub_disk_dev_register (&grub_util_biosdisk_dev);
+}
+
+void
+grub_util_biosdisk_fini (void)
+{
+  unsigned i;
+
+  for (i = 0; i < ARRAY_SIZE(map); i++)
+    {
+      if (map[i].drive)
+	free (map[i].drive);
+      if (map[i].device)
+	free (map[i].device);
+      map[i].drive = map[i].device = NULL;
+    }
+
+  grub_disk_dev_unregister (&grub_util_biosdisk_dev);
+}
+
+const char *
+grub_util_biosdisk_get_compatibility_hint (grub_disk_t disk)
+{
+  if (disk->dev != &grub_util_biosdisk_dev || map[disk->id].device_map)
+    return disk->name;
+  return 0;
+}
+
+const char *
+grub_util_biosdisk_get_osdev (grub_disk_t disk)
+{
+  if (disk->dev != &grub_util_biosdisk_dev)
+    return 0;
+
+  return map[disk->id].device;
+}
+
+
+static char *
+grub_util_path_concat_real (size_t n, int ext, va_list ap)
+{
+  size_t totlen = 0;
+  char **l = xcalloc (n + ext, sizeof (l[0]));
+  char *r, *p, *pi;
+  size_t i;
+  int first = 1;
+
+  for (i = 0; i < n + ext; i++)
+    {
+      l[i] = va_arg (ap, char *);
+      if (l[i])
+	totlen += strlen (l[i]) + 1;
+    }
+
+  r = xmalloc (totlen + 10);
+
+  p = r;
+  for (i = 0; i < n; i++)
+    {
+      pi = l[i];
+      if (!pi)
+	continue;
+      while (*pi == '/')
+	pi++;
+      if ((p != r || (pi != l[i] && first)) && (p == r || *(p - 1) != '/'))
+	*p++ = '/';
+      first = 0;
+      p = grub_stpcpy (p, pi);
+      while (p != r && p != r + 1 && *(p - 1) == '/')
+	p--;
+    }
+
+  if (ext && l[i])
+    p = grub_stpcpy (p, l[i]);
+
+  *p = '\0';
+
+  free (l);
+
+  return r;
+}
+
+char *
+grub_util_path_concat (size_t n, ...)
+{
+  va_list ap;
+  char *r;
+
+  va_start (ap, n);
+
+  r = grub_util_path_concat_real (n, 0, ap);
+
+  va_end (ap);
+
+  return r;
+}
+
+char *
+grub_util_path_concat_ext (size_t n, ...)
+{
+  va_list ap;
+  char *r;
+
+  va_start (ap, n);
+
+  r = grub_util_path_concat_real (n, 1, ap);
+
+  va_end (ap);
+
+  return r;
+}
diff --git a/grub-core/kern/emu/hostfs.c b/grub-core/kern/emu/hostfs.c
new file mode 100644
index 0000000..cb53210
--- /dev/null
+++ b/grub-core/kern/emu/hostfs.c
@@ -0,0 +1,200 @@
+/* hostfs.c - Dummy filesystem to provide access to the hosts filesystem  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 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 <config-util.h>
+
+#include <grub/fs.h>
+#include <grub/file.h>
+#include <grub/disk.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/dl.h>
+#include <grub/util/misc.h>
+#include <grub/emu/hostdisk.h>
+#include <grub/i18n.h>
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+static int
+is_dir (const char *path, const char *name)
+{
+  int len1 = strlen(path);
+  int len2 = strlen(name);
+  int ret;
+
+  char *pathname = xmalloc (len1 + 1 + len2 + 1 + 13);
+  strcpy (pathname, path);
+
+  /* Avoid UNC-path "//name" on Cygwin.  */
+  if (len1 > 0 && pathname[len1 - 1] != '/')
+    strcat (pathname, "/");
+
+  strcat (pathname, name);
+
+  ret = grub_util_is_directory (pathname);
+  free (pathname);
+  return ret;
+}
+
+struct grub_hostfs_data
+{
+  char *filename;
+  grub_util_fd_t f;
+};
+
+static grub_err_t
+grub_hostfs_dir (grub_device_t device, const char *path,
+		 grub_fs_dir_hook_t hook, void *hook_data)
+{
+  grub_util_fd_dir_t dir;
+
+  /* Check if the disk is our dummy disk.  */
+  if (grub_strcmp (device->disk->name, "host"))
+    return grub_error (GRUB_ERR_BAD_FS, "not a hostfs");
+
+  dir = grub_util_fd_opendir (path);
+  if (! dir)
+    return grub_error (GRUB_ERR_BAD_FILENAME,
+		       N_("can't open `%s': %s"), path,
+		       grub_util_fd_strerror ());
+
+  while (1)
+    {
+      grub_util_fd_dirent_t de;
+      struct grub_dirhook_info info;
+      grub_memset (&info, 0, sizeof (info));
+
+      de = grub_util_fd_readdir (dir);
+      if (! de)
+	break;
+
+      info.dir = !! is_dir (path, de->d_name);
+      hook (de->d_name, &info, hook_data);
+
+    }
+
+  grub_util_fd_closedir (dir);
+
+  return GRUB_ERR_NONE;
+}
+
+/* Open a file named NAME and initialize FILE.  */
+static grub_err_t
+grub_hostfs_open (struct grub_file *file, const char *name)
+{
+  grub_util_fd_t f;
+  struct grub_hostfs_data *data;
+
+  f = grub_util_fd_open (name, GRUB_UTIL_FD_O_RDONLY);
+  if (! GRUB_UTIL_FD_IS_VALID (f))
+    return grub_error (GRUB_ERR_BAD_FILENAME,
+		       N_("can't open `%s': %s"), name,
+		       strerror (errno));
+  data = grub_malloc (sizeof (*data));
+  if (!data)
+    {
+      grub_util_fd_close (f);
+      return grub_errno;
+    }
+  data->filename = grub_strdup (name);
+  if (!data->filename)
+    {
+      grub_free (data);
+      grub_util_fd_close (f);
+      return grub_errno;
+    }
+
+  data->f = f;  
+
+  file->data = data;
+
+  file->size = grub_util_get_fd_size (f, name, NULL);
+
+  return GRUB_ERR_NONE;
+}
+
+static grub_ssize_t
+grub_hostfs_read (grub_file_t file, char *buf, grub_size_t len)
+{
+  struct grub_hostfs_data *data;
+
+  data = file->data;
+  if (grub_util_fd_seek (data->f, file->offset) != 0)
+    {
+      grub_error (GRUB_ERR_OUT_OF_RANGE, N_("cannot seek `%s': %s"),
+		  data->filename, grub_util_fd_strerror ());
+      return -1;
+    }
+
+  unsigned int s = grub_util_fd_read (data->f, buf, len);
+  if (s != len)
+    grub_error (GRUB_ERR_FILE_READ_ERROR, N_("cannot read `%s': %s"),
+		data->filename, grub_util_fd_strerror ());
+
+  return (signed) s;
+}
+
+static grub_err_t
+grub_hostfs_close (grub_file_t file)
+{
+  struct grub_hostfs_data *data;
+
+  data = file->data;
+  grub_util_fd_close (data->f);
+  grub_free (data->filename);
+  grub_free (data);
+
+  return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_hostfs_label (grub_device_t device __attribute ((unused)),
+		   char **label __attribute ((unused)))
+{
+  *label = 0;
+  return GRUB_ERR_NONE;
+}
+
+#undef open
+#undef close
+
+static struct grub_fs grub_hostfs_fs =
+  {
+    .name = "hostfs",
+    .fs_dir = grub_hostfs_dir,
+    .fs_open = grub_hostfs_open,
+    .fs_read = grub_hostfs_read,
+    .fs_close = grub_hostfs_close,
+    .fs_label = grub_hostfs_label,
+    .next = 0
+  };
+
+
+
+GRUB_MOD_INIT(hostfs)
+{
+  grub_fs_register (&grub_hostfs_fs);
+}
+
+GRUB_MOD_FINI(hostfs)
+{
+  grub_fs_unregister (&grub_hostfs_fs);
+}
diff --git a/grub-core/kern/emu/lite.c b/grub-core/kern/emu/lite.c
new file mode 100644
index 0000000..b327d4e
--- /dev/null
+++ b/grub-core/kern/emu/lite.c
@@ -0,0 +1,47 @@
+#include <config.h>
+#include <grub/emu/misc.h>
+
+#ifndef GRUB_MACHINE_EMU
+#error "This source is only meant for grub-emu platform"
+#endif
+
+#if defined(__i386__)
+#include "../i386/dl.c"
+#elif defined(__x86_64__)
+#include "../x86_64/dl.c"
+#elif defined(__sparc__)
+#include "../sparc64/dl.c"
+#elif defined(__mips__)
+#include "../mips/dl.c"
+#elif defined(__powerpc__)
+#include "../powerpc/dl.c"
+#elif defined(__ia64__)
+#include "../ia64/dl_helper.c"
+#include "../ia64/dl.c"
+#elif defined(__arm__)
+#include "../arm/dl_helper.c"
+#include "../arm/dl.c"
+#elif defined(__aarch64__)
+#include "../arm64/dl_helper.c"
+#include "../arm64/dl.c"
+#elif defined(__riscv)
+#include "../riscv/dl.c"
+#else
+#error "No target cpu type is defined"
+#endif
+
+const int grub_no_modules = 0;
+
+/* grub-emu-lite supports dynamic module loading, so it won't have any
+   embedded modules.  */
+void
+grub_init_all (void)
+{
+  return;
+}
+
+void
+grub_fini_all (void)
+{
+  return;
+}
diff --git a/grub-core/kern/emu/main.c b/grub-core/kern/emu/main.c
new file mode 100644
index 0000000..425bb96
--- /dev/null
+++ b/grub-core/kern/emu/main.c
@@ -0,0 +1,286 @@
+/*
+ *  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 <config.h>
+#include <config-util.h>
+
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <setjmp.h>
+#include <string.h>
+#include <signal.h>
+#include <sys/types.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 <grub/loader.h>
+#include <grub/util/misc.h>
+
+#pragma GCC diagnostic ignored "-Wmissing-prototypes"
+
+#include "progname.h"
+#include <argp.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 *root_dev = NULL, *dir = NULL;
+
+grub_addr_t grub_modbase = 0;
+
+void
+grub_reboot (void)
+{
+  longjmp (main_env, 1);
+  grub_fatal ("longjmp failed");
+}
+
+void
+grub_exit (void)
+{
+  grub_reboot ();
+}
+
+void
+grub_machine_init (void)
+{
+}
+
+void
+grub_machine_get_bootlocation (char **device, char **path)
+{
+  *device = root_dev;
+  *path = dir;
+}
+
+void
+grub_machine_fini (int flags)
+{
+  if (flags & GRUB_LOADER_FLAG_NORETURN)
+    grub_console_fini ();
+}
+
+
+
+#define OPT_MEMDISK 257
+
+static struct argp_option options[] = {
+  {"root",      'r', N_("DEVICE_NAME"), 0, N_("Set root device."), 2},
+  {"device-map",  'm', N_("FILE"), 0,
+   /* TRANSLATORS: There are many devices in device map.  */
+   N_("use FILE as the device map [default=%s]"), 0},
+  {"memdisk",  OPT_MEMDISK, N_("FILE"), 0,
+   /* TRANSLATORS: There are many devices in device map.  */
+   N_("use FILE as memdisk"), 0},
+  {"directory",  'd', N_("DIR"), 0,
+   N_("use GRUB files in the directory DIR [default=%s]"), 0},
+  {"verbose",     'v', 0,      0, N_("print verbose messages."), 0},
+  {"hold",     'H', N_("SECS"),      OPTION_ARG_OPTIONAL, N_("wait until a debugger will attach"), 0},
+  { 0, 0, 0, 0, 0, 0 }
+};
+
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
+
+static char *
+help_filter (int key, const char *text, void *input __attribute__ ((unused)))
+{
+  switch (key)
+    {
+    case 'd':
+      return xasprintf (text, DEFAULT_DIRECTORY);
+    case 'm':
+      return xasprintf (text, DEFAULT_DEVICE_MAP);
+    default:
+      return (char *) text;
+    }
+}
+
+#pragma GCC diagnostic error "-Wformat-nonliteral"
+
+struct arguments
+{
+  const char *dev_map;
+  const char *mem_disk;
+  int hold;
+};
+
+static error_t
+argp_parser (int key, char *arg, struct argp_state *state)
+{
+  /* Get the input argument from argp_parse, which we
+     know is a pointer to our arguments structure. */
+  struct arguments *arguments = state->input;
+
+  switch (key)
+    {
+    case OPT_MEMDISK:
+      arguments->mem_disk = arg;
+      break;
+    case 'r':
+      free (root_dev);
+      root_dev = xstrdup (arg);
+      break;
+    case 'd':
+      free (dir);
+      dir = xstrdup (arg);
+      break;
+    case 'm':
+      arguments->dev_map = arg;
+      break;
+    case 'H':
+      arguments->hold = (arg ? atoi (arg) : -1);
+      break;
+    case 'v':
+      verbosity++;
+      break;
+
+    case ARGP_KEY_ARG:
+      {
+	/* Too many arguments. */
+	fprintf (stderr, _("Unknown extra argument `%s'."), arg);
+	fprintf (stderr, "\n");
+	argp_usage (state);
+      }
+      break;
+
+    default:
+      return ARGP_ERR_UNKNOWN;
+    }
+  return 0;
+}
+
+static struct argp argp = {
+  options, argp_parser, NULL,
+  N_("GRUB emulator."),
+  NULL, help_filter, NULL
+};
+
+
+
+#pragma GCC diagnostic ignored "-Wmissing-prototypes"
+
+int
+main (int argc, char *argv[])
+{
+  struct arguments arguments =
+    { 
+      .dev_map = DEFAULT_DEVICE_MAP,
+      .hold = 0,
+      .mem_disk = 0,
+    };
+  volatile int hold = 0;
+  size_t total_module_size = sizeof (struct grub_module_info), memdisk_size = 0;
+  struct grub_module_info *modinfo;
+  void *mods;
+
+  grub_util_host_init (&argc, &argv);
+
+  dir = xstrdup (DEFAULT_DIRECTORY);
+
+  if (argp_parse (&argp, argc, argv, 0, 0, &arguments) != 0)
+    {
+      fprintf (stderr, "%s", _("Error in parsing command line arguments\n"));
+      exit(1);
+    }
+
+  if (arguments.mem_disk)
+    {
+      memdisk_size = ALIGN_UP(grub_util_get_image_size (arguments.mem_disk), 512);
+      total_module_size += memdisk_size + sizeof (struct grub_module_header);
+    }
+
+  mods = xmalloc (total_module_size);
+  modinfo = grub_memset (mods, 0, total_module_size);
+  mods = (char *) (modinfo + 1);
+
+  modinfo->magic = GRUB_MODULE_MAGIC;
+  modinfo->offset = sizeof (struct grub_module_info);
+  modinfo->size = total_module_size;
+
+  if (arguments.mem_disk)
+    {
+      struct grub_module_header *header = (struct grub_module_header *) mods;
+      header->type = OBJ_TYPE_MEMDISK;
+      header->size = memdisk_size + sizeof (*header);
+      mods = header + 1;
+
+      grub_util_load_image (arguments.mem_disk, mods);
+      mods = (char *) mods + memdisk_size;
+    }
+
+  grub_modbase = (grub_addr_t) modinfo;
+
+  hold = arguments.hold;
+  /* Wait until the ARGS.HOLD variable is cleared by an attached debugger. */
+  if (hold && verbosity > 0)
+    /* TRANSLATORS: In this case GRUB tells user what he has to do.  */
+    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_console_init ();
+  grub_host_init ();
+
+  /* XXX: This is a bit unportable.  */
+  grub_util_biosdisk_init (arguments.dev_map);
+
+  grub_init_all ();
+
+  grub_hostfs_init ();
+
+  /* Make sure that there is a root device.  */
+  if (! root_dev)
+    root_dev = grub_strdup ("host");
+
+  dir = xstrdup (dir);
+
+  /* Start GRUB!  */
+  if (setjmp (main_env) == 0)
+    grub_main ();
+
+  grub_fini_all ();
+  grub_hostfs_fini ();
+  grub_host_fini ();
+
+  grub_machine_fini (GRUB_LOADER_FLAG_NORETURN);
+
+  return 0;
+}
diff --git a/grub-core/kern/emu/misc.c b/grub-core/kern/emu/misc.c
new file mode 100644
index 0000000..dfd8a8e
--- /dev/null
+++ b/grub-core/kern/emu/misc.c
@@ -0,0 +1,216 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2005,2006,2007,2008,2009,2010  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/>.
+ */
+
+#ifndef GRUB_BUILD
+#include <config-util.h>
+#endif
+#include <config.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/types.h>
+
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/env.h>
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/i18n.h>
+#include <grub/time.h>
+#include <grub/emu/misc.h>
+
+int verbosity;
+
+void
+grub_util_warn (const char *fmt, ...)
+{
+  va_list ap;
+
+  fprintf (stderr, _("%s: warning:"), program_name);
+  fprintf (stderr, " ");
+  va_start (ap, fmt);
+  vfprintf (stderr, fmt, ap);
+  va_end (ap);
+  fprintf (stderr, ".\n");
+  fflush (stderr);
+}
+
+void
+grub_util_info (const char *fmt, ...)
+{
+  if (verbosity > 0)
+    {
+      va_list ap;
+
+      fprintf (stderr, _("%s: info:"), program_name);
+      fprintf (stderr, " ");
+      va_start (ap, fmt);
+      vfprintf (stderr, fmt, ap);
+      va_end (ap);
+      fprintf (stderr, ".\n");
+      fflush (stderr);
+    }
+}
+
+void
+grub_util_error (const char *fmt, ...)
+{
+  va_list ap;
+
+  fprintf (stderr, _("%s: error:"), program_name);
+  fprintf (stderr, " ");
+  va_start (ap, fmt);
+  vfprintf (stderr, fmt, ap);
+  va_end (ap);
+  fprintf (stderr, ".\n");
+  exit (1);
+}
+
+void *
+xcalloc (grub_size_t nmemb, grub_size_t size)
+{
+  void *p;
+
+  p = calloc (nmemb, size);
+  if (!p)
+    grub_util_error ("%s", _("out of memory"));
+
+  return p;
+}
+
+void *
+xmalloc (grub_size_t size)
+{
+  void *p;
+
+  p = malloc (size);
+  if (! p)
+    grub_util_error ("%s", _("out of memory"));
+
+  return p;
+}
+
+void *
+xrealloc (void *ptr, grub_size_t size)
+{
+  ptr = realloc (ptr, size);
+  if (! ptr)
+    grub_util_error ("%s", _("out of memory"));
+
+  return ptr;
+}
+
+char *
+xstrdup (const char *str)
+{
+  size_t len;
+  char *newstr;
+
+  len = strlen (str);
+  newstr = (char *) xmalloc (len + 1);
+  memcpy (newstr, str, len + 1);
+
+  return newstr;
+}
+
+#if !defined (GRUB_MKFONT) && !defined (GRUB_BUILD)
+char *
+xasprintf (const char *fmt, ...)
+{ 
+  va_list ap;
+  char *result;
+  
+  va_start (ap, fmt);
+  result = grub_xvasprintf (fmt, ap);
+  va_end (ap);
+  if (!result)
+    grub_util_error ("%s", _("out of memory"));
+  
+  return result;
+}
+#endif
+
+#if !defined (GRUB_MACHINE_EMU) || defined (GRUB_UTIL)
+void
+grub_exit (void)
+{
+  exit (1);
+}
+#endif
+
+grub_uint64_t
+grub_get_time_ms (void)
+{
+  struct timeval tv;
+
+  gettimeofday (&tv, 0);
+
+  return (tv.tv_sec * 1000 + tv.tv_usec / 1000);
+}
+
+size_t
+grub_util_get_image_size (const char *path)
+{
+  FILE *f;
+  size_t ret;
+  off_t sz;
+
+  f = grub_util_fopen (path, "rb");
+
+  if (!f)
+    grub_util_error (_("cannot open `%s': %s"), path, strerror (errno));
+
+  fseeko (f, 0, SEEK_END);
+  
+  sz = ftello (f);
+  if (sz < 0)
+    grub_util_error (_("cannot open `%s': %s"), path, strerror (errno));
+  if (sz != (size_t) sz)
+    grub_util_error (_("file `%s' is too big"), path);
+  ret = (size_t) sz;
+
+  fclose (f);
+
+  return ret;
+}
+
+void
+grub_util_load_image (const char *path, char *buf)
+{
+  FILE *fp;
+  size_t size;
+
+  grub_util_info ("reading %s", path);
+
+  size = grub_util_get_image_size (path);
+
+  fp = grub_util_fopen (path, "rb");
+  if (! fp)
+    grub_util_error (_("cannot open `%s': %s"), path,
+		     strerror (errno));
+
+  if (fread (buf, 1, size, fp) != size)
+    grub_util_error (_("cannot read `%s': %s"), path,
+		     strerror (errno));
+
+  fclose (fp);
+}
diff --git a/grub-core/kern/emu/mm.c b/grub-core/kern/emu/mm.c
new file mode 100644
index 0000000..4d1046a
--- /dev/null
+++ b/grub-core/kern/emu/mm.c
@@ -0,0 +1,75 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2005,2006,2007,2008,2009,2010  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 <config-util.h>
+
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/mm.h>
+#include <stdlib.h>
+#include <string.h>
+#include <grub/i18n.h>
+
+void *
+grub_calloc (grub_size_t nmemb, grub_size_t size)
+{
+  void *ret;
+  ret = calloc (nmemb, size);
+  if (!ret)
+    grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
+  return ret;
+}
+
+void *
+grub_malloc (grub_size_t size)
+{
+  void *ret;
+  ret = malloc (size);
+  if (!ret)
+    grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
+  return ret;
+}
+
+void *
+grub_zalloc (grub_size_t size)
+{
+  void *ret;
+
+  ret = grub_malloc (size);
+  if (!ret)
+    return NULL;
+  memset (ret, 0, size);
+  return ret;
+}
+
+void
+grub_free (void *ptr)
+{
+  if (ptr)
+    free (ptr);
+}
+
+void *
+grub_realloc (void *ptr, grub_size_t size)
+{
+  void *ret;
+  ret = realloc (ptr, size);
+  if (!ret)
+    grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
+  return ret;
+}
diff --git a/grub-core/kern/emu/time.c b/grub-core/kern/emu/time.c
new file mode 100644
index 0000000..5da8092
--- /dev/null
+++ b/grub-core/kern/emu/time.c
@@ -0,0 +1,46 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 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 <grub/datetime.h>
+#include <time.h>
+
+grub_err_t
+grub_get_datetime (struct grub_datetime *datetime)
+{
+  struct tm *mytm;
+  time_t mytime;
+
+  mytime = time (&mytime);
+  mytm = gmtime (&mytime);
+
+  datetime->year = mytm->tm_year + 1900;
+  datetime->month = mytm->tm_mon + 1;
+  datetime->day = mytm->tm_mday;
+  datetime->hour = mytm->tm_hour;
+  datetime->minute = mytm->tm_min;
+  datetime->second = mytm->tm_sec;
+
+  return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_set_datetime (struct grub_datetime *datetime __attribute__ ((unused)))
+{
+  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+		     "no clock setting routine available");
+}