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2009-06-16 Pavel Roskin <proski@gnu.org>

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* boot/i386/pc/boot.S: Remove root_drive.  Assert offset of
	boot_drive_check by using GRUB_BOOT_MACHINE_DRIVE_CHECK.  Don't
	save %dx, we only need %dl and we never change it.
	* boot/i386/pc/cdboot.S: Don't set the root drive.
	* boot/i386/pc/pxeboot.S: Likewise.
	* include/grub/i386/pc/boot.h: Remove
	GRUB_BOOT_MACHINE_ROOT_DRIVE, adjust
	GRUB_BOOT_MACHINE_DRIVE_CHECK.
	* include/grub/i386/pc/kernel.h: Remove grub_root_drive.
	* kern/i386/pc/init.c (make_install_device): Remove references
	to grub_root_drive.
	* kern/i386/pc/startup.S: Likewise.
	* util/i386/pc/grub-setup.c (setup): Don't set root_drive.
This commit is contained in:
proski 2009-06-15 23:25:38 +00:00
parent 693fe63766
commit 3ef17a2ebf
9 changed files with 27 additions and 36 deletions
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16
ChangeLog
View file

@ -1,3 +1,19 @@
2009-06-16 Pavel Roskin <proski@gnu.org>
* boot/i386/pc/boot.S: Remove root_drive. Assert offset of
boot_drive_check by using GRUB_BOOT_MACHINE_DRIVE_CHECK. Don't
save %dx, we only need %dl and we never change it.
* boot/i386/pc/cdboot.S: Don't set the root drive.
* boot/i386/pc/pxeboot.S: Likewise.
* include/grub/i386/pc/boot.h: Remove
GRUB_BOOT_MACHINE_ROOT_DRIVE, adjust
GRUB_BOOT_MACHINE_DRIVE_CHECK.
* include/grub/i386/pc/kernel.h: Remove grub_root_drive.
* kern/i386/pc/init.c (make_install_device): Remove references
to grub_root_drive.
* kern/i386/pc/startup.S: Likewise.
* util/i386/pc/grub-setup.c (setup): Don't set root_drive.
2009-06-16 Vladimir Serbinenko <phcoder@gmail.com>
xnu_uuid command

11
boot/i386/pc/boot.S
View file

@ -102,8 +102,6 @@ kernel_sector:
boot_drive:
.byte 0xff /* the disk to load kernel from */
/* 0xff means use the boot drive */
root_drive:
.byte 0xff
after_BPB:
@ -118,6 +116,7 @@ after_BPB:
* possible boot drive. If GRUB is installed into a floppy,
* this does nothing (only jump).
*/
. = _start + GRUB_BOOT_MACHINE_DRIVE_CHECK
boot_drive_check:
jmp 1f /* grub-setup may overwrite this jump */
testb $0x80, %dl
@ -151,14 +150,12 @@ real_start:
/*
* Check if we have a forced disk reference here
*/
/* assign root_drive at the same time */
#ifdef APPLE_CC
boot_drive_abs = ABS (boot_drive)
movw boot_drive_abs, %ax
movb boot_drive_abs, %al
#else
movw ABS(boot_drive), %ax
movb ABS(boot_drive), %al
#endif
movb %ah, %dh
cmpb $0xff, %al
je 1f
movb %al, %dl
@ -343,7 +340,6 @@ setup_sectors:
/* restore %dl */
popw %dx
pushw %dx
/* head start */
movb %al, %dh
@ -399,7 +395,6 @@ copy_buffer:
popw %ds
popa
popw %dx
/* boot kernel */
#ifdef APPLE_CC

3
boot/i386/pc/cdboot.S
View file

@ -86,9 +86,6 @@ bi_reserved:
call read_cdrom
/* Root drive will default to boot drive */
movb $0xFF, %dh
ljmp $(DATA_ADDR >> 4), $0
/*

3
boot/i386/pc/pxeboot.S
View file

@ -27,8 +27,7 @@
_start:
start:
/* Root drive will default to boot drive */
movb $0xFF, %dh
/* Use drive number 0x7F for PXE */
movb $0x7F, %dl
/* Jump to the real world */

5
include/grub/i386/pc/boot.h
View file

@ -34,9 +34,6 @@
/* The offset of BOOT_DRIVE. */
#define GRUB_BOOT_MACHINE_BOOT_DRIVE 0x4c
/* The offset of ROOT_DRIVE. */
#define GRUB_BOOT_MACHINE_ROOT_DRIVE 0x4d
/* The offset of KERNEL_ADDRESS. */
#define GRUB_BOOT_MACHINE_KERNEL_ADDRESS 0x40
@ -47,7 +44,7 @@
#define GRUB_BOOT_MACHINE_KERNEL_SEGMENT 0x42
/* The offset of BOOT_DRIVE_CHECK. */
#define GRUB_BOOT_MACHINE_DRIVE_CHECK 0x4f
#define GRUB_BOOT_MACHINE_DRIVE_CHECK 0x4e
/* The offset of a magic number used by Windows NT. */
#define GRUB_BOOT_MACHINE_WINDOWS_NT_MAGIC 0x1b8

3
include/grub/i386/pc/kernel.h
View file

@ -71,9 +71,6 @@ extern char grub_prefix[];
/* The boot BIOS drive number. */
extern grub_uint8_t EXPORT_VAR(grub_boot_drive);
/* The root BIOS drive number. */
extern grub_uint8_t grub_root_drive;
#endif /* ! ASM_FILE */
#endif /* ! KERNEL_MACHINE_HEADER */

11
kern/i386/pc/init.c
View file

@ -60,13 +60,10 @@ make_install_device (void)
if (grub_prefix[0] != '(')
{
/* If the root drive is not set explicitly, assume that it is identical
to the boot drive. */
if (grub_root_drive == 0xFF)
grub_root_drive = grub_boot_drive;
grub_sprintf (dev, "(%cd%u", (grub_root_drive & 0x80) ? 'h' : 'f',
grub_root_drive & 0x7f);
/* No hardcoded root partition - make it from the boot drive and the
partition number encoded at the install time. */
grub_sprintf (dev, "(%cd%u", (grub_boot_drive & 0x80) ? 'h' : 'f',
grub_boot_drive & 0x7f);
if (grub_install_dos_part >= 0)
grub_sprintf (dev + grub_strlen (dev), ",%u", grub_install_dos_part + 1);

6
kern/i386/pc/startup.S
View file

@ -195,9 +195,8 @@ codestart:
sti /* we're safe again */
/* save boot and root drive references */
/* save the boot drive */
ADDR32 movb %dl, EXT_C(grub_boot_drive)
ADDR32 movb %dh, EXT_C(grub_root_drive)
/* reset disk system (%ah = 0) */
int $0x13
@ -300,9 +299,6 @@ codestart:
VARIABLE(grub_boot_drive)
.byte 0
VARIABLE(grub_root_drive)
.byte 0
.p2align 2 /* force 4-byte alignment */
/*

5
util/i386/pc/grub-setup.c
View file

@ -94,7 +94,7 @@ setup (const char *dir,
grub_uint16_t core_sectors;
grub_device_t root_dev, dest_dev;
const char *dest_partmap;
grub_uint8_t *boot_drive, *root_drive;
grub_uint8_t *boot_drive;
grub_disk_addr_t *kernel_sector;
grub_uint16_t *boot_drive_check;
struct boot_blocklist *first_block, *block;
@ -207,7 +207,6 @@ setup (const char *dir,
/* Set the addresses of variables in the boot image. */
boot_drive = (grub_uint8_t *) (boot_img + GRUB_BOOT_MACHINE_BOOT_DRIVE);
root_drive = (grub_uint8_t *) (boot_img + GRUB_BOOT_MACHINE_ROOT_DRIVE);
kernel_sector = (grub_disk_addr_t *) (boot_img
+ GRUB_BOOT_MACHINE_KERNEL_SECTOR);
boot_drive_check = (grub_uint16_t *) (boot_img
@ -379,7 +378,6 @@ setup (const char *dir,
/* FIXME: can this be skipped? */
*boot_drive = 0xFF;
*root_drive = 0xFF;
*kernel_sector = grub_cpu_to_le64 (embed_region.start);
@ -513,7 +511,6 @@ unable_to_embed:
/* FIXME: can this be skipped? */
*boot_drive = 0xFF;
*root_drive = 0xFF;
*install_dos_part = grub_cpu_to_le32 (dos_part);
*install_bsd_part = grub_cpu_to_le32 (bsd_part);