grub-0.97-patch1-startups

grub for dos ,people can use it in dos for calling linux

+
+	movl	$8, %ecx
+	movl	$ABS(option_fat16), %esi
+	movl	%ebx, %edi
+
+	cld
+	repz cmpsb
+
+	jnz	3f
+
+	xorl	%ebx, %ebx	# invalid file descriptor for CLOSE below
+	
+	cmpl	$0xfffffff7, ABS(fstypes)
+	jnz	2f
+	movl	$0, ABS(fstypes)
+2:
+	orb	$2, ABS(fstypes)
+	jmp	1b
+
+3:
+
+	/* check --fat32 */
+
+	movl	$8, %ecx
+	movl	$ABS(option_fat32), %esi
+	movl	%ebx, %edi
+
+	cld
+	repz cmpsb
+
+	jnz	3f
+
+	xorl	%ebx, %ebx	# invalid file descriptor for CLOSE below
+	
+	cmpl	$0xfffffff7, ABS(fstypes)
+	jnz	2f
+	movl	$0, ABS(fstypes)
+2:
+	orb	$4, ABS(fstypes)
+	jmp	1b
+
+3:
+
+	/* check --ntfs */
+
+	movl	$7, %ecx
+	movl	$ABS(option_ntfs), %esi
+	movl	%ebx, %edi
+
+	cld
+	repz cmpsb
+
+	jnz	3f
+
+	xorl	%ebx, %ebx	# invalid file descriptor for CLOSE below
+	
+	cmpl	$0xfffffff7, ABS(fstypes)
+	jnz	2f
+	movl	$0, ABS(fstypes)
+2:
+	orb	$8, ABS(fstypes)
+	jmp	1b
+
+3:
+
+	/* check --ext2 */
+
+	movl	$7, %ecx
+	movl	$ABS(option_ext2), %esi
+	movl	%ebx, %edi
+
+	cld
+	repz cmpsb
+
+	jnz	3f
+
+	xorl	%ebx, %ebx	# invalid file descriptor for CLOSE below
+	
+	cmpl	$0xfffffff7, ABS(fstypes)
+	jnz	2f
+	movl	$0, ABS(fstypes)
+2:
+	orb	$0x10, ABS(fstypes)
+	jmp	1b
+
+3:
+
+	/* check --vfat */
+
+	movl	$7, %ecx
+	movl	$ABS(option_vfat), %esi
+	movl	%ebx, %edi
+
+	cld
+	repz cmpsb
+
+	jnz	3f
+
+	xorl	%ebx, %ebx	# invalid file descriptor for CLOSE below
+	
+	cmpl	$0xfffffff7, ABS(fstypes)
+	jnz	2f
+	movl	$0, ABS(fstypes)
+2:
+	orb	$7, ABS(fstypes)
+	jmp	1b
+
+3:
+
+	movl	$ABS(msg_invalid_option), %ecx
+	jmp	4f	/* error */
+
+1:
+
+//----------------------------------------------------------------------------
+	/* end of arguments */
+
+	/* ECX=EBX=0 */
+
+	xorl	%ebx, %ebx	# invalid file descriptor for CLOSE below
+	
+	testl	%eax, %eax		# filename already specified?
+	//cmpl	$0, ABS(filename)	# filename already specified?
+	movl	$ABS(msg_no_file), %ecx
+	jz	4f	/* error */
+
+	xchgl	%eax, %ebx		# move EAX to EBX
+	//movl	ABS(filename), %ebx	# move filename to EBX
+
+	/* EBX points to the pathname of the file. */
+
+	/* check if preferred_partition matches preferred_drive */
+
+	movb	ABS(preferred_drive), %al
+	movb	ABS(preferred_partition), %ah
+
+	cmpb	$0xff, %al
+	jne	1f
+
+	movl	%ebx, %edi	# save EBX to EDI
+	xorl	%ebx, %ebx	# invalid file descriptor for CLOSE below
+	cmpb	$0xff, %ah
+	movl	$ABS(msg_partition_without_drive), %ecx
+	jne	4f	/* error */
+	movl	%edi, %ebx	# restore EBX from EDI
+1:
+
+	/* EBX points to the pathname of the file. */
+
+	movl	%ebx, %edi	# save EBX to EDI
+	xorl	%ebx, %ebx	# invalid file descriptor for CLOSE below
+	
+	cmpl	$0xffffffff, ABS(floppy)
+	je	1f		# --floppy is not specified
+
+	/* if --floppy is specified, should not specify the options for MBR. */
+	cmpl	$1, ABS(backup_mbr)
+	movl	$ABS(msg_option_backup_mbr_with_floppy), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0, ABS(mbr_floppy)
+	movl	$ABS(msg_option_mbr_floppy_with_floppy), %ecx
+	jnz	4f	/* error */
+	
+	cmpl	$0, ABS(mbr_osbr)
+	movl	$ABS(msg_option_mbr_osbr_with_floppy), %ecx
+	jnz	4f	/* error */
+	
+	cmpl	$0, ABS(boot_prevmbr)
+	movl	$ABS(msg_option_boot_prevmbr_with_floppy), %ecx
+	jnz	4f	/* error */
+	
+	cmpl	$0xff, ABS(preferred_drive)
+	movl	$ABS(msg_option_preferred_drive_with_floppy), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xff, ABS(preferred_partition)
+	movl	$ABS(msg_option_preferred_partition_with_floppy), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffffffff, ABS(install_partition)
+	movl	$ABS(msg_option_install_partition_with_floppy), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffffff05, ABS(time_out)
+	movl	$ABS(msg_option_time_out_with_floppy), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffff3920, ABS(hot_key)
+	movl	$ABS(msg_option_hot_key_with_floppy), %ecx
+	jnz	4f	/* error */
+	
+	/* for a floppy, start_sector should be 0, and
+	 * for a partition, start_sector should be non-zero
+	 */
+	cmpl	$0xff, ABS(floppy)
+	je	2f		# a real floppy
+
+	/* a single partition */
+	cmpl	$0, ABS(start_sector)
+	movl	$ABS(msg_partition_start), %ecx
+	jz	4f	/* error */
+
+	jmp	3f	
+2:
+	/* a real floppy */
+	/* */
+	cmpl	$0xffffffff, ABS(start_sector)
+	je	3f
+	cmpl	$0, ABS(start_sector)
+	movl	$ABS(msg_floppy_start), %ecx
+	jnz	4f	/* error */
+
+3:
+	jmp	2f
+1:
+
+	/* EBX=0 */
+
+	cmpl	$0xffffffff, ABS(install_partition)
+	je	1f		# --install-partition is not specified
+
+	/* should not specify --install-partition with options for MBR. */
+	cmpl	$1, ABS(backup_mbr)
+	movl	$ABS(msg_option_backup_mbr_with_partition), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0, ABS(mbr_floppy)
+	movl	$ABS(msg_option_mbr_floppy_with_partition), %ecx
+	jnz	4f	/* error */
+	
+	cmpl	$0, ABS(mbr_osbr)
+	movl	$ABS(msg_option_mbr_osbr_with_partition), %ecx
+	jnz	4f	/* error */
+	
+	cmpl	$0, ABS(boot_prevmbr)
+	movl	$ABS(msg_option_boot_prevmbr_with_partition), %ecx
+	jnz	4f	/* error */
+	
+	cmpl	$0xff, ABS(preferred_drive)
+	movl	$ABS(msg_option_preferred_drive_with_partition), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xff, ABS(preferred_partition)
+	movl	$ABS(msg_option_preferred_partition_with_partition), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffffff05, ABS(time_out)
+	movl	$ABS(msg_option_time_out_with_partition), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffff3920, ABS(hot_key)
+	movl	$ABS(msg_option_hot_key_with_partition), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffffff3f, ABS(sectors_per_track)
+	movl	$ABS(msg_option_sectors_per_track_with_partition), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffff00ff, ABS(heads)
+	movl	$ABS(msg_option_heads_with_partition), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffffffff, ABS(start_sector)
+	movl	$ABS(msg_option_start_sector_with_partition), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0, ABS(total_sectors)
+	movl	$ABS(msg_option_total_sectors_with_partition), %ecx
+	jnz	4f	/* error */
+
+	jmp	2f
+1:
+
+	/* EBX=0 */
+
+	/* this is an MBR device. Should not specify floppy-specific options. */
+
+	testl	$1, ABS(boot_prevmbr)	/* --boot-prevmbr-first specified? */
+	jnz	2f			/* Yes, specified. Continue */
+	/* No, not specified. */
+	/* Should not specify --time-out without --boot-prevmbr-first. */
+	cmpl	$0xffffff05, ABS(time_out)
+	movl	$ABS(msg_option_time_out_without_prevmbr), %ecx
+	jne	4f	/* error */
+
+	/* Should not specify --hot-key without --boot-prevmbr-first. */
+	cmpl	$0xffff3920, ABS(hot_key)
+	movl	$ABS(msg_option_hot_key_without_prevmbr), %ecx
+	jne	4f	/* error */
+
+2:
+
+	/* EBX=0, EDI points to the pathname of the file. */
+
+//----------------------------------------------------------------------------
+	movl	%edi, %ebx	# restore EBX from EDI
+	
+	/* EBX=EDI points to the pathname of the file. */
+
+#ifdef __DOS_16
+
+	xorl	%eax, %eax
+	//movl	%ebx, %edi	/* EBX points to the pathname of the file. */
+	movl	$0xfe, %ebx
+	call	7f	/* parse_number */
+	jc	2f	/* invalid number */
+	/* EBX holds the bios drive number */
+	movl	%ebx, ABS(bios_drive_number)
+	jmp	1f
+2:
+	//AH = 3Dh	//OPEN EXISTING FILE
+	//AL = access and sharing modes (see #01402)
+	//DS:DX -> ASCIZ filename
+	//CL = attribute mask of files to look for (server call only)
+
+	//Return:
+	//CF clear if successful AX = file handle
+	//CF set on error AX = error code (01h,02h,03h,04h,05h,0Ch,56h)
+
+	movzbl	ABS(read_only), %eax
+	movb	$0x3d, %ah	// open file for read/write
+	movl	%edi, %edx	// DS:DX points to ASCIZ filename
+	int	$0x21
+	jnc	1f
+	negl	%eax		/* EAX < 0 */
+1:
+#else
+
+	/* int open(const char *pathname, int flags, mode_t mode) */
+
+	movl	$5, %eax	# sys_open
+	movzbl	ABS(read_only), %ecx	# O_RDWR = 02
+	int	$0x80
+#endif
+	xorl	%ebx, %ebx	# invalid file descriptor for CLOSE below
+	movl	$ABS(msg_open_file_rw), %ecx
+	cmpw	$2, ABS(read_only)
+	je	1f
+	movl	$ABS(msg_open_file_ro), %ecx
+1:
+	testl	%eax, %eax
+	js	4f	/* error */
+
+//----------------------------------------------------------------------------
+	/* open file succeeded */
+
+	pushl	%eax		# file descriptor, or 0 if specified BIOS drive
+	movl	%eax, %ebx
+
+	/* EBX and the stack holds the file descriptor number or 0 */
+	
+#ifdef __DOS_16
+
+	xorl	%eax, %eax
+	cmpl	$0xff, ABS(bios_drive_number)
+	je	1f
+	movw	$0x204, %ax	# read 4 sectors of the MBR
+	movw	$ABS(mbr_63_sectors), %bx
+	movw	$1, %cx
+	movw	ABS(bios_drive_number), %dx
+	int	$0x13
+	jmp	2f
+1:
+	//READ FROM FILE OR DEVICE
+
+	//AH = 3Fh
+	//BX = file handle
+	//CX = number of bytes to read
+	//DS:DX -> buffer for data
+
+	//Return:
+	//CF clear if successful AX = number of bytes actually read (0 if at EOF before call)
+       	//CF set on error AX = error code (05h,06h) 
+	movl	$0x3f00, %eax
+	movl	$(63*512), %ecx
+	movl	$ABS(mbr_63_sectors), %edx
+	int	$0x21
+2:
+	jnc	1f
+	negl	%eax
+1:
+#else
+	/* ssize_t read(int fd, void *buf, size_t count) */
+
+	movl	$3, %eax	# sys_read
+	movl	$ABS(mbr_63_sectors), %ecx
+	movl	$(63*512), %edx	# read 63 sectors
+	int	$0x80
+#endif
+
+	popl	%ebx		# file descriptor, or 0 if specified BIOS drive
+	testl	%eax, %eax
+	movl	$ABS(msg_read_file), %ecx
+	js	4f	/* error */
+
+//----------------------------------------------------------------------------
+
+	/* rewind the file for write! important! */
+
+	pushl	%ebx		# file descriptor, or 0 if specified BIOS drive
+
+#ifdef __DOS_16
+
+	xorl	%eax, %eax
+	cmpl	$0xff, ABS(bios_drive_number)
+	jne	1f
+	//LSEEK - SET CURRENT FILE POSITION
+
+	//AH = 42h
+	//AL = origin of move
+	//	00h start of file
+	//	01h current file position
+	//	02h end of file
+	//BX = file handle
+	//CX:DX = (signed) offset from origin of new file position
+
+	//Return:
+	//CF clear if successful DX:AX = new file position in bytes from start of file
+	//CF set on error AX = error code (01h,06h) 
+	movl	$0x4200, %eax
+	movl	$0, %ecx
+	movl	$0, %edx
+	int	$0x21
+	jnc	1f
+	negl	%eax
+1:
+#else
+	/* off_t lseek(int fildes, off_t offset, int whence) */
+
+	movl	$19, %eax	# sys_lseek
+	movl	$0, %ecx
+	movl	$0, %edx	# SEEK_SET = 0
+	int	$0x80
+#endif
+
+	popl	%ebx		# file descriptor, or 0 if specified BIOS drive
+	testl	%eax, %eax
+	movl	$ABS(msg_lseek_file), %ecx
+	js	4f	/* error */
+
+//----------------------------------------------------------------------------
+	/* remember EBX holds file descriptor number, and don't touch it */
+
+	/* check if the partition table is valid. */
+
+	movl	$ABS(mbr_63_sectors), %esi
+	cmpw	$0xAA55, 0x1fe(iSI)
+	movl	$ABS(msg_boot_signature_mbr), %ecx
+	//jne	4f	/* error */
+	clc
+	jne	2f
+
+	call	9f	/* probe_geometry */
+	jnc	1f
+
+2:
+
+	/* should be floppy since no partition table or no boot signature. */
+
+	/* CF=0 means no boot signature, CF=1 means no partition table. */
+
+	jnc	2f
+
+	movl	$ABS(msg_invalid_partition_table), %ecx
+2:
+	cmpl	$0xffffffff, ABS(floppy)	/* Is --floppy specified? */
+	je	4f	/* error */
+	
+	/* Yes, --floppy is specified */
+
+	/* ESI points to ABS(mbr_63_sectors) */
+	call	5f	/* floppy routine */
+	movl	$0, %ecx
+	jc	4f	/* error */
+	
+	jmp	2f	/* write file */
+1:
+
+//----------------------------------------------------------------------------
+	/* the image type is MBR. So, should not specify --floppy */
+
+	cmpl	$0xffffffff, ABS(floppy)
+	movl	$ABS(msg_floppy_partition_table), %ecx
+	jne	4f	/* error */
+	
+	cmpl	$0xffffff3f, ABS(sectors_per_track)
+	movl	$ABS(msg_option_sectors_per_track_for_mbr), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffff00ff, ABS(heads)
+	movl	$ABS(msg_option_heads_for_mbr), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffffffff, ABS(start_sector)
+	movl	$ABS(msg_option_start_sector_for_mbr), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0, ABS(total_sectors)
+	movl	$ABS(msg_option_total_sectors_for_mbr), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xffffffff, ABS(lba)
+	movl	$ABS(msg_option_lba_for_mbr), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$0xfffffff7, ABS(fstypes)
+	movl	$ABS(msg_option_fstypes_for_mbr), %ecx
+	jnz	4f	/* error */
+
+	cmpl	$((pre_stage2_start - _start1) / 512), ABS(probed_sectors_per_track)
+	movl	$ABS(msg_sectors_per_track), %ecx
+	jb	4f	/* error */
+
+	cmpl	$0xffffffff, ABS(install_partition)
+	movl	$ABS(msg_option_install_partition_not_implemented), %ecx
+	je	1f
+	jmp	4f	/* error */
+	/* EBX holds the file descriptor number or 0 if it is BIOS drive */
+	/* move partition table forward to the beginning of the 17th sector */
+	movl	$ABS(mbr_63_sectors + 0x01be), %esi
+	movl	$ABS(mbr_63_sectors + 0x2000), %edi
+	movl	$0x10, %ecx	# 0x10 dwords = 0x40 bytes
+
+	cld
+	repz movsl
+
+	/* initialize the current_partition number */
+	movzbl	ABS(install_partition), %eax
+	movl	%eax, ABS(current_partition)
+
+3:
+	/* load the next partition and modify the boot record */
+	call	0f	/* partition */
+	jc	3f	/* done */
+	call	2f	/* write to file */
+	incl	ABS(current_partition)
+	movw	ABS(install_partition), %ax
+	addb	%ah, %al	/* Max partition number for install */
+	cmpb	%al, ABS(current_partition)
+	jbe	3b
+3:
+	/* all partitions have been installed. */
+	
+	xorl	%eax, %eax	# exit code = 0
+	
+#ifdef __DOS_16
+	
+	movb	$0x4c, %ah	// EXIT - TERMINATE WITH RETURN CODE in AL
+	int	$0x21		// call DOS
+
+#else
+	xchgl	%eax, %ebx	# move exit code in EAX to EBX
+	movl	$1, %eax	# sys_exit
+	int	$0x80
+#endif
+		
+	ret
+
+1:
+//----------------------------------------------------------------------------
+	/* backup mbr */
+
+	/* auto backup */
+	cmpl	$1, ABS(backup_mbr)
+	jnz	1f
+
+	/* check if the second sector consists of 512 dups of one byte */
+	movb	ABS(mbr_63_sectors + 0x200), %al
+	movl	$ABS(mbr_63_sectors + 0x200), %edi
+	movl	$0x200, %ecx
+
+	cld
+	repz scasb
+
+	jz	1f			# yes, enable backup
+
+	movl	$0, ABS(backup_mbr)	# no, do not backup
+
+1:
+