Re: Are BSD partitions not supported?

[Vladimir 'φ-coder/phcoder' Serbinenko]

C. P. Ghost wrote:
> 2010/5/19 Vladimir 'φ-coder/phcoder' Serbinenko <address@hidden>:
>   
>>> /usr/local/bin/gcc44 -o kernel.img kernel_img-kern_i386_pc_startup.o
>>> kernel_img-kern_i386_misc.o kernel_img-kern_main.o
>>> kernel_img-kern_device.o kernel_img-kern_disk.o kernel_img-kern_dl.o
>>> kernel_img-kern_file.o kernel_img-kern_fs.o kernel_img-kern_err.o
>>> kernel_img-kern_misc.o kernel_img-kern_mm.o kernel_img-kern_term.o
>>> kernel_img-kern_rescue_parser.o kernel_img-kern_rescue_reader.o
>>> kernel_img-kern_time.o kernel_img-kern_list.o
>>> kernel_img-kern_handler.o kernel_img-kern_command.o
>>> kernel_img-kern_corecmd.o kernel_img-kern___target_cpu__dl.o
>>> kernel_img-kern_i386_pc_init.o kernel_img-kern_i386_pc_mmap.o
>>> kernel_img-kern_parser.o kernel_img-kern_partition.o
>>> kernel_img-kern_i386_tsc.o kernel_img-kern_i386_pit.o
>>> kernel_img-kern_generic_rtc_get_time_ms.o
>>> kernel_img-kern_generic_millisleep.o kernel_img-kern_env.o
>>> kernel_img-term_i386_pc_console.o kernel_img-term_i386_vga_common.o
>>> kernel_img-symlist.o -nostdlib -static-libgcc  -m32
>>> -Wl,--build-id=none -lgcc  -nostdlib -Wl,-N  -Wl,-Ttext,0x8200 -mrtd
>>> -mregparm=3
>>> /usr/local/bin/ld: skipping incompatible
>>> /usr/local/lib/gcc44/gcc/x86_64-portbld-freebsd8.0/4.4.4/libgcc.a when
>>> searching for -lgcc
>>> /usr/local/bin/ld: skipping incompatible /usr/lib/libgcc.a when
>>> searching for -lgcc
>>> /usr/local/bin/ld: cannot find -lgcc
>>> collect2: ld returned 1 exit status
>>> gmake: *** [kernel.img] Error 1
>>>
>>>       
>> Normally you need 32-bit libgcc. As a test build you can just remove
>> -lgcc but this isn't supported.
>>     
>
> Ah, okay. If I remove -lgcc manually, everything compiles.
>
> This is what I get now (after reformatting the partition with newfs):
>
> phenom# grub-install --root-directory=/mnt --modules=ufs2 /dev/md5555
> /usr/local/sbin/grub-setup: warn: Your embedding area is unusually
> small.  core.img won't fit in it..
> /usr/local/sbin/grub-setup: warn: Embedding is not possible.  GRUB can
> only be installed in this setup by using blocklists.  However,
> blocklists are UNRELIABLE and their use is discouraged..
> /usr/local/sbin/grub-setup: error: if you really want blocklists, use --force.
>
> Using --force:
>
> phenom# grub-install --force --root-directory=/mnt --modules=ufs2 /dev/md5555
> /usr/local/sbin/grub-setup: warn: Your embedding area is unusually
> small.  core.img won't fit in it..
> /usr/local/sbin/grub-setup: warn: Embedding is not possible.  GRUB can
> only be installed in this setup by using blocklists.  However,
> blocklists are UNRELIABLE and their use is discouraged..
> Installation finished. No error reported.
>
> If I boot now with qemu:
>
> % qemu -hda bsddisk.img
> GRUB loading...
> Welcome to GRUB!
>
> error: no such partition.
> Entering rescue mode...
> grub rescue> _
>
> I compressed the image again: here it is now:
>
> http://www.cordula.ws/tempdir/bsddisk_2.7z
>
> -cpghost.
>
>   


-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko

=== modified file 'include/grub/bsdlabel.h'
--- include/grub/bsdlabel.h     2010-02-06 17:43:37 +0000
+++ include/grub/bsdlabel.h     2010-05-18 22:05:09 +0000
@@ -63,6 +63,8 @@
 #define        GRUB_PC_PARTITION_OPENBSD_TYPE_NTFS     18
 #define        GRUB_PC_PARTITION_OPENBSD_TYPE_RAID     19
 
+#define GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION 2
+
 /* The BSD partition entry.  */
 struct grub_partition_bsd_entry
 {

=== modified file 'kern/i386/pc/init.c'
--- kern/i386/pc/init.c 2010-02-06 23:52:31 +0000
+++ kern/i386/pc/init.c 2010-05-19 19:19:18 +0000
@@ -75,8 +75,8 @@
          ptr += grub_strlen (ptr);
 
          if (grub_install_bsd_part >= 0)
-           grub_snprintf (ptr, sizeof (dev) - (ptr - dev), ",%c",
-                          grub_install_bsd_part + 'a');
+           grub_snprintf (ptr, sizeof (dev) - (ptr - dev), ",%u",
+                          grub_install_bsd_part + 1);
          ptr += grub_strlen (ptr);
        }
 

=== modified file 'partmap/bsdlabel.c'
--- partmap/bsdlabel.c  2010-03-26 14:44:13 +0000
+++ partmap/bsdlabel.c  2010-05-18 22:13:37 +0000
@@ -37,9 +37,6 @@
   grub_disk_addr_t delta = 0;
   unsigned pos;
 
-  /* BSDLabel offsets are absolute even when it's embed inside partition.  */
-  delta = grub_partition_get_start (disk->partition);
-
   /* Read the BSD label.  */
   if (grub_disk_read (disk, GRUB_PC_PARTITION_BSD_LABEL_SECTOR,
                      0, sizeof (label), &label))
@@ -49,15 +46,36 @@
   if (label.magic != grub_cpu_to_le32 (GRUB_PC_PARTITION_BSD_LABEL_MAGIC))
     return grub_error (GRUB_ERR_BAD_PART_TABLE, "no signature");
 
+  /* A kludge to determine a base of be.offset.  */
+  if (GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION
+      < grub_cpu_to_le16 (label.num_partitions))
+    {
+      struct grub_partition_bsd_entry whole_disk_be;
+
+      pos = sizeof (label) + GRUB_PC_PARTITION_BSD_LABEL_SECTOR
+       * GRUB_DISK_SECTOR_SIZE + sizeof (struct grub_partition_bsd_entry)
+       * GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION;
+
+      if (grub_disk_read (disk, pos / GRUB_DISK_SECTOR_SIZE,
+                         pos % GRUB_DISK_SECTOR_SIZE, sizeof (whole_disk_be),
+                         &whole_disk_be))
+       return grub_errno;
+
+      delta = grub_le_to_cpu32 (whole_disk_be.offset);
+    }
+
   pos = sizeof (label) + GRUB_PC_PARTITION_BSD_LABEL_SECTOR
     * GRUB_DISK_SECTOR_SIZE;
 
   for (p.number = 0;
        p.number < grub_cpu_to_le16 (label.num_partitions);
-       p.number++)
+       p.number++, pos += sizeof (struct grub_partition_bsd_entry))
     {
       struct grub_partition_bsd_entry be;
 
+      if (p.number == GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION)
+       continue;
+
       p.offset = pos / GRUB_DISK_SECTOR_SIZE;
       p.index = pos % GRUB_DISK_SECTOR_SIZE;
 
@@ -68,11 +86,9 @@
       p.len = grub_le_to_cpu32 (be.size);
       p.partmap = &grub_bsdlabel_partition_map;
 
-      if (be.fs_type != GRUB_PC_PARTITION_BSD_TYPE_UNUSED)
+      if (p.len != 0)
        if (hook (disk, &p))
          return grub_errno;
-
-      pos += sizeof (struct grub_partition_bsd_entry);
     }
 
   return GRUB_ERR_NONE;

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