Removed some useless code:

- gcc assumes that %ecx and %edx are clobbered (due to calling
  conventions), thus there is no need for saving/restoring those two
  registers.
- %es is reset to default value by real_to_prot, thus there is no need
  for saving/restorig that register.
Submitted by:	tegge

2 files changed, 2 insertions, 24 deletions

diff --git a/sys/i386/boot/biosboot/bios.S b/sys/i386/boot/biosboot/bios.S
index 3bce011..884b7b6 100644
--- a/sys/i386/boot/biosboot/bios.S
+++ b/sys/i386/boot/biosboot/bios.S
@@ -24,7 +24,7 @@
  * the rights to redistribute these changes.
  *
  *	from: Mach, Revision 2.2  92/04/04  11:34:26  rpd
- *	$Id$
+ *	$Id: bios.S,v 1.9 1997/02/22 09:30:05 peter Exp $
  */
 
 /*
@@ -77,9 +77,6 @@ ENTRY(biosread)
 	push	%ebx
 	push	%esi
 	push	%edi
-	push	%ecx
-	push	%edx
-	push	%es
 
 	movb	0x10(%ebp), %dh
 	movw	0x0c(%ebp), %cx
@@ -111,9 +108,6 @@ ENTRY(biosread)
 	xor	%eax, %eax
 	movb	%bh, %al		/* return value in %ax */
 
-	pop	%es
-	pop	%edx
-	pop	%ecx
 	pop	%edi
 	pop	%esi
 	pop	%ebx
@@ -138,7 +132,6 @@ ENTRY(putc)
 	push	%ebx
 	push	%esi
 	push    %edi
-	push	%ecx
 
 	movb	0x8(%ebp), %cl
 
@@ -155,7 +148,6 @@ ENTRY(putc)
 	data32
 	call	EXT(real_to_prot)
 
-	pop	%ecx
 	pop	%edi
 	pop	%esi
 	pop	%ebx
@@ -252,12 +244,9 @@ nochar:
 ENTRY(get_diskinfo)
 	push	%ebp
 	mov	%esp, %ebp
-	push	%es
 	push	%ebx
 	push	%esi
 	push	%edi
-	push	%ecx
-	push	%edx
 
 	movb	0x8(%ebp), %dl		/* diskinfo(drive #) */
 	call	EXT(prot_to_real)	/* enter real mode */
@@ -306,12 +295,9 @@ ok:
 	andb	$0x3f, %cl		/* mask of cylinder gunk */
 	movb	%cl, %al		/* max sector (and # sectors) */
 
-	pop	%edx
-	pop	%ecx
 	pop	%edi
 	pop	%esi
 	pop	%ebx
-	pop	%es
 	pop	%ebp
 	ret
 
diff --git a/sys/i386/boot/biosboot/serial.S b/sys/i386/boot/biosboot/serial.S
index 90356a0..09060ab 100644
--- a/sys/i386/boot/biosboot/serial.S
+++ b/sys/i386/boot/biosboot/serial.S
@@ -24,7 +24,7 @@
  * the rights to redistribute these changes.
  *
  *	from: Mach, Revision 2.2  92/04/04  11:34:26  rpd
- *	$Id$
+ *	$Id: serial.S,v 1.6 1997/02/22 09:30:11 peter Exp $
  */
 
 /*
@@ -93,7 +93,6 @@ WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 ENTRY(serial_putc)
 	push	%ebp
 	mov	%esp, %ebp
-	push	%edx
 
 	mov	$COMCONSOLE + 5, %edx	# line status reg
 1:	inb	%dx, %al
@@ -105,7 +104,6 @@ ENTRY(serial_putc)
 	sub	$5, %edx	# TX output reg
 	outb	%al, %dx	# send this one
 
-	pop	%edx
 	pop	%ebp
 	ret
 
@@ -117,7 +115,6 @@ ENTRY(serial_putc)
 ENTRY(serial_getc)
 	push	%ebp
 	mov	%esp, %ebp
-	push	%edx
 
 	mov	$COMCONSOLE + 5, %edx	# line status reg
 1:
@@ -134,7 +131,6 @@ ENTRY(serial_getc)
 	jne	2f
 	mov	$0x08, %eax	# look like BS
 2:
-	pop	%edx
 	pop	%ebp
 	ret
 
@@ -145,14 +141,12 @@ ENTRY(serial_getc)
 ENTRY(serial_ischar)
 	push	%ebp
 	mov	%esp, %ebp
-	push	%edx
 
 	xorl	%eax, %eax
 	mov	$COMCONSOLE + 5, %edx	# line status reg
 	inb	%dx, %al
 	andb	$0x01, %al		# RX char available?
 
-	pop	%edx
 	pop	%ebp
 	ret
 
@@ -163,7 +157,6 @@ ENTRY(serial_ischar)
 ENTRY(init_serial)
 	push	%ebp
 	mov	%esp, %ebp
-	push	%edx
 
 	mov	$COMCONSOLE + 3, %edx	# line control reg
 	movb	$0x80, %al
@@ -195,6 +188,5 @@ ENTRY(init_serial)
 	add	$5, %edx
 	jmp	1b
 2:
-	pop	%edx
 	pop	%ebp
 	ret