From 25e09515ad227965a31fde020aa406afdb0c4492 Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Sat, 25 Sep 2010 21:42:13 +0200
Subject: [PATCH] Make mb header to protected part

---
 grub-core/kern/i386/pc/startup.S | 106 +++++++++++++++----------------
 include/grub/offsets.h           |   4 +-
 2 files changed, 53 insertions(+), 57 deletions(-)

diff --git a/grub-core/kern/i386/pc/startup.S b/grub-core/kern/i386/pc/startup.S
index 9319df98e..c4abc31b8 100644
--- a/grub-core/kern/i386/pc/startup.S
+++ b/grub-core/kern/i386/pc/startup.S
@@ -109,7 +109,58 @@ bss_start:
 bss_end:
 	.long 0
 #endif
+/*
+ *  This is the area for all of the special variables.
+ */
 
+VARIABLE(grub_boot_drive)
+	.byte	0
+
+/* the real mode code continues... */
+LOCAL (codestart):
+	cli		/* we're not safe here! */
+
+	/* set up %ds, %ss, and %es */
+	xorw	%ax, %ax
+	movw	%ax, %ds
+	movw	%ax, %ss
+	movw	%ax, %es
+
+	/* set up the real mode/BIOS stack */
+	movl	$GRUB_MEMORY_MACHINE_REAL_STACK, %ebp
+	movl	%ebp, %esp
+
+	sti		/* we're safe again */
+
+	/* save the boot drive */
+	ADDR32	movb	%dl, EXT_C(grub_boot_drive)
+
+	/* reset disk system (%ah = 0) */
+	int	$0x13
+
+	/* transition to protected mode */
+	DATA32	call real_to_prot
+
+	/* The ".code32" directive takes GAS out of 16-bit mode. */
+	.code32
+
+	incl	%eax
+	call	grub_gate_a20
+
+	movl	EXT_C(grub_compressed_size), %edx
+	addl    $(GRUB_KERNEL_MACHINE_RAW_SIZE - GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART), %edx
+	movl    reed_solomon_redundancy, %ecx
+	leal    _start + GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART, %eax
+	testl   %edx, %edx
+	jz post_reed_solomon
+	call    EXT_C (grub_reed_solomon_recover)
+	jmp post_reed_solomon
+
+#include <rs_decoder.S>
+
+	.text
+
+	. = _start + GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART
 /*
  * 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,
@@ -173,53 +224,7 @@ multiboot_trampoline:
         movb    $0xFF, %dh
 	/* enter the usual booting */
 	call	prot_to_real
-	.code16
 
-/* the real mode code continues... */
-LOCAL (codestart):
-	cli		/* we're not safe here! */
-
-	/* set up %ds, %ss, and %es */
-	xorw	%ax, %ax
-	movw	%ax, %ds
-	movw	%ax, %ss
-	movw	%ax, %es
-
-	/* set up the real mode/BIOS stack */
-	movl	$GRUB_MEMORY_MACHINE_REAL_STACK, %ebp
-	movl	%ebp, %esp
-
-	sti		/* we're safe again */
-
-	/* save the boot drive */
-	ADDR32	movb	%dl, EXT_C(grub_boot_drive)
-
-	/* reset disk system (%ah = 0) */
-	int	$0x13
-
-	/* transition to protected mode */
-	DATA32	call real_to_prot
-
-	/* The ".code32" directive takes GAS out of 16-bit mode. */
-	.code32
-
-	incl	%eax
-	call	grub_gate_a20
-
-	movl	EXT_C(grub_compressed_size), %edx
-	addl    $(GRUB_KERNEL_MACHINE_RAW_SIZE - GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART), %edx
-	movl    reed_solomon_redundancy, %ecx
-	leal    _start + GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART, %eax
-	testl   %edx, %edx
-	jz post_reed_solomon
-	call    EXT_C (grub_reed_solomon_recover)
-	jmp post_reed_solomon
-
-#include <rs_decoder.S>
-
-	.text
-
-	. = _start + GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART
 post_reed_solomon:
 
 #ifdef ENABLE_LZMA
@@ -289,15 +294,6 @@ post_reed_solomon:
 	 */
 	call EXT_C(grub_main)
 
-/*
- *  This is the area for all of the special variables.
- */
-
-VARIABLE(grub_boot_drive)
-	.byte	0
-
-	.p2align	2	/* force 4-byte alignment */
-
 #include "../realmode.S"
 
 /*
diff --git a/include/grub/offsets.h b/include/grub/offsets.h
index 28db0115c..f11dffaca 100644
--- a/include/grub/offsets.h
+++ b/include/grub/offsets.h
@@ -41,9 +41,9 @@
 #define GRUB_KERNEL_I386_PC_MULTIBOOT_SIGNATURE 0x20
 
 /* The size of the first region which won't be compressed.  */
-#define GRUB_KERNEL_I386_PC_RAW_SIZE		0xc80
+#define GRUB_KERNEL_I386_PC_RAW_SIZE		0xc90
 
-#define GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART 0x75c
+#define GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_PART 0x6f8
 
 /* The offset of GRUB_PREFIX.  */
 #define GRUB_KERNEL_I386_PC_PREFIX		GRUB_KERNEL_I386_PC_RAW_SIZE