2005-09-29 Yoshinori K. Okuji <okuji@enbug.org>

Make GRUB's kernel compliant to Multiboot Specification.

        * kern/i386/pc/startup.S (multiboot_header): New label.
        (multiboot_entry): Likewise.
        (multiboot_trampoline): Likewise.

        * include/grub/i386/pc/kernel.h (GRUB_KERNEL_MACHINE_RAW_SIZE):
        Increased to 0x4A0.

        * fs/xfs.c (grub_xfs_iterate_dir): Fix a syntax error. You may not
        put parentheses after a question mark.
        [!GRUB_UTIL] (my_mod): New variable.

        * util/grub-emu.c (main): Call grub_xfs_init and grub_xfs_fini.

ChangeLog

@@ -1,3 +1,20 @@
+2005-09-29  Yoshinori K. Okuji  <okuji@enbug.org>
+
+	Make GRUB's kernel compliant to Multiboot Specification.
+	
+	* kern/i386/pc/startup.S (multiboot_header): New label.
+	(multiboot_entry): Likewise.
+	(multiboot_trampoline): Likewise.
+
+	* include/grub/i386/pc/kernel.h (GRUB_KERNEL_MACHINE_RAW_SIZE):
+	Increased to 0x4A0.
+
+	* fs/xfs.c (grub_xfs_iterate_dir): Fix a syntax error. You may not
+	put parentheses after a question mark.
+	[!GRUB_UTIL] (my_mod): New variable.
+
+	* util/grub-emu.c (main): Call grub_xfs_init and grub_xfs_fini.
+
 2005-09-28  Marco Gerards  <mgerards@xs4all.nl>
 
 	Adds support for the XFS filesystem.  Btrees are not supported

fs/xfs.c

@@ -119,6 +119,11 @@ struct grub_xfs_data
   struct grub_fshelp_node diropen;
 
 };
+
+#ifndef GRUB_UTIL
+static grub_dl_t my_mod;
+#endif
+
 
 
 /* Filetype information as used in inodes.  */
@@ -300,6 +305,7 @@ grub_xfs_iterate_dir (grub_fshelp_node_t dir,
 				grub_fshelp_node_t node))
 {
   struct grub_fshelp_node *diro = (struct grub_fshelp_node *) dir;
+  auto int call_hook (grub_uint64_t ino, char *filename);
     
   int call_hook (grub_uint64_t ino, char *filename)
     {
@@ -370,8 +376,8 @@ grub_xfs_iterate_dir (grub_fshelp_node_t dir,
 
 	    de = ((struct grub_xfs_dir_entry *) 
 		  (((char *) de)+ sizeof (struct grub_xfs_dir_entry) + de->len
-		   + (smallino ? (sizeof (grub_uint32_t)
+		   + (smallino ? sizeof (grub_uint32_t)
-				  : sizeof (grub_uint64_t))) - 1));
+		      : sizeof (grub_uint64_t))) - 1);
 	  }
 	break;
       }

include/grub/i386/pc/kernel.h

@@ -39,7 +39,7 @@
 #define GRUB_KERNEL_MACHINE_PREFIX		0x1c
 
 /* The size of the first region which won't be compressed.  */
-#define GRUB_KERNEL_MACHINE_RAW_SIZE		0x440
+#define GRUB_KERNEL_MACHINE_RAW_SIZE		0x4A0
 
 #ifndef ASM_FILE
 

kern/i386/pc/startup.S

@@ -104,6 +104,66 @@ VARIABLE(grub_prefix)
 
 	. = EXT_C(start) + 0x50
 
+/*
+ * Support for booting GRUB from a Multiboot boot loader (e.g. GRUB itself).
+ * This uses the a.out kludge to load raw binary to the area starting at 1MB,
+ * and relocates itself after loaded.
+ */
+multiboot_header:
+	/* magic */
+	.long	0x1BADB002
+	/* flags */
+	.long	(1 << 16)
+	/* checksum */
+	.long	-0x1BADB002 - (1 << 16)
+	/* header addr */
+	.long	multiboot_header - _start + 0x100000 + 0x200
+	/* load addr */
+	.long	0x100000
+	/* load end addr */
+	.long	0
+	/* bss end addr */
+	.long	0
+	/* entry addr */
+	.long	multiboot_entry - _start + 0x100000 + 0x200
+	
+multiboot_entry:
+	.code32
+	/* obtain the boot device */
+	movl	12(%ebx), %edx
+
+	/* relocate the code */
+	movl	$(GRUB_KERNEL_MACHINE_RAW_SIZE + 0x200), %ecx
+	addl	EXT_C(grub_compressed_size) - _start + 0x100000 + 0x200, %ecx
+	movl	$0x100000, %esi
+	movl	$GRUB_BOOT_MACHINE_KERNEL_ADDR, %edi
+	cld
+	rep
+	movsb
+	/* jump to the real address */
+	movl	$multiboot_trampoline, %eax
+	jmp	*%eax
+	
+multiboot_trampoline:
+	/* fill the boot information */
+	movl	%edx, %eax
+	shrl	$8, %eax
+	xorl	%ebx, %ebx
+	cmpb	$0xFF, %al
+	je	1f
+	movb	%ah, %bl
+	movl	%ebx, EXT_C(grub_install_dos_part)
+1:
+	cmpb	$0xFF, %ah
+	je	2f
+	movb	%al, %bl
+	movl	%ebx, EXT_C(grub_install_bsd_part)
+2:
+	shrl	$24, %edx
+	/* enter the usual booting */
+	call	prot_to_real
+	.code16
+	
 /* the real mode code continues... */
 codestart:
 	cli		/* we're not safe here! */

util/grub-emu.c

@@ -196,6 +196,7 @@ main (int argc, char *argv[])
 
   /* Initialize the default modules.  */
   grub_iso9660_init ();
+  grub_xfs_init ();
   grub_fat_init ();
   grub_ext2_init ();
   grub_ufs_init ();
@@ -241,6 +242,7 @@ main (int argc, char *argv[])
   grub_hfs_fini ();
   grub_jfs_fini ();
   grub_fat_fini ();
+  grub_xfs_fini ();
   grub_boot_fini ();
   grub_cmp_fini ();
   grub_cat_fini ();