Adding upstream version 2.06.upstream/2.06upstream

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

1 files changed, 151 insertions, 0 deletions

diff --git a/grub-core/partmap/sunpc.c b/grub-core/partmap/sunpc.c
new file mode 100644
index 0000000..73a430c
--- /dev/null
+++ b/grub-core/partmap/sunpc.c
@@ -0,0 +1,151 @@
+/* sunpc.c - Read SUN PC style partition tables.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2005,2006,2007,2009  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/partition.h>
+#include <grub/disk.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/dl.h>
+#include <grub/symbol.h>
+#include <grub/types.h>
+#include <grub/err.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#define GRUB_PARTMAP_SUN_PC_MAGIC 0xDABE
+#define GRUB_PARTMAP_SUN_PC_MAX_PARTS 16
+#define GRUB_PARTMAP_SUN_PC_WHOLE_DISK_ID 0x05
+
+struct grub_sun_pc_partition_descriptor
+{
+  grub_uint16_t id;
+  grub_uint16_t unused;
+  grub_uint32_t start_sector;
+  grub_uint32_t num_sectors;
+} GRUB_PACKED;
+
+struct grub_sun_pc_block
+{
+  grub_uint8_t unused[72];
+  struct grub_sun_pc_partition_descriptor partitions[GRUB_PARTMAP_SUN_PC_MAX_PARTS];
+  grub_uint8_t unused2[244];
+  grub_uint16_t  magic;         /* Magic number.  */
+  grub_uint16_t  csum;          /* Label xor'd checksum.  */
+} GRUB_PACKED;
+
+static struct grub_partition_map grub_sun_pc_partition_map;
+
+/* Verify checksum (true=ok).  */
+static int
+grub_sun_is_valid (grub_uint16_t *label)
+{
+  grub_uint16_t *pos;
+  grub_uint16_t sum = 0;
+
+  for (pos = label;
+       pos < (label + sizeof (struct grub_sun_pc_block) / 2);
+       pos++)
+    sum ^= *pos;
+
+  return ! sum;
+}
+
+static grub_err_t
+sun_pc_partition_map_iterate (grub_disk_t disk,
+			      grub_partition_iterate_hook_t hook,
+			      void *hook_data)
+{
+  grub_partition_t p;
+  union
+  {
+    struct grub_sun_pc_block sun_block;
+    grub_uint16_t raw[0];
+  } block;
+  int partnum;
+  grub_err_t err;
+
+  p = (grub_partition_t) grub_zalloc (sizeof (struct grub_partition));
+  if (! p)
+    return grub_errno;
+
+  p->partmap = &grub_sun_pc_partition_map;
+  err = grub_disk_read (disk, 1, 0, sizeof (struct grub_sun_pc_block), &block);
+  if (err)
+    {
+      grub_free (p);
+      return err;
+    }
+  
+  if (GRUB_PARTMAP_SUN_PC_MAGIC != grub_le_to_cpu16 (block.sun_block.magic))
+    {
+      grub_free (p);
+      return grub_error (GRUB_ERR_BAD_PART_TABLE, 
+			 "not a sun_pc partition table");
+    }
+
+  if (! grub_sun_is_valid (block.raw))
+    {
+      grub_free (p);
+      return grub_error (GRUB_ERR_BAD_PART_TABLE, "invalid checksum");
+    }
+
+  /* Maybe another error value would be better, because partition
+     table _is_ recognized but invalid.  */
+  for (partnum = 0; partnum < GRUB_PARTMAP_SUN_PC_MAX_PARTS; partnum++)
+    {
+      struct grub_sun_pc_partition_descriptor *desc;
+
+      if (block.sun_block.partitions[partnum].id == 0
+	  || block.sun_block.partitions[partnum].id
+	  == GRUB_PARTMAP_SUN_PC_WHOLE_DISK_ID)
+	continue;
+
+      desc = &block.sun_block.partitions[partnum];
+      p->start = grub_le_to_cpu32 (desc->start_sector);
+      p->len = grub_le_to_cpu32 (desc->num_sectors);
+      p->number = partnum;
+      if (p->len)
+	{
+	  if (hook (disk, p, hook_data))
+	    partnum = GRUB_PARTMAP_SUN_PC_MAX_PARTS;
+	}
+    }
+
+  grub_free (p);
+
+  return grub_errno;
+}
+
+/* Partition map type.  */
+static struct grub_partition_map grub_sun_pc_partition_map =
+  {
+    .name = "sunpc",
+    .iterate = sun_pc_partition_map_iterate,
+  };
+
+GRUB_MOD_INIT(part_sunpc)
+{
+  grub_partition_map_register (&grub_sun_pc_partition_map);
+}
+
+GRUB_MOD_FINI(part_sunpc)
+{
+  grub_partition_map_unregister (&grub_sun_pc_partition_map);
+}
+