[src/trunk]: src/sys/arch/i386/stand/lib %bl is part of %bx, %bx contains the...

[jakllsch <jakllsch%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/881e655270cc
branches:  trunk
changeset: 762357:881e655270cc
user:      jakllsch <jakllsch%NetBSD.org@localhost>
date:      Sun Feb 20 05:45:48 2011 +0000

description:
%bl is part of %bx, %bx contains the address we requested from the BIOS.
Thus, use %cl instead of %bl for return value storage.

diffstat:

 sys/arch/i386/stand/lib/biosmemps2.S |  13 ++++++-------
 1 files changed, 6 insertions(+), 7 deletions(-)

diffs (47 lines):

diff -r 0b0d5e727c82 -r 881e655270cc sys/arch/i386/stand/lib/biosmemps2.S
--- a/sys/arch/i386/stand/lib/biosmemps2.S      Sun Feb 20 05:42:34 2011 +0000
+++ b/sys/arch/i386/stand/lib/biosmemps2.S      Sun Feb 20 05:45:48 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: biosmemps2.S,v 1.4 2009/11/21 11:52:57 dsl Exp $       */
+/*     $NetBSD: biosmemps2.S,v 1.5 2011/02/20 05:45:48 jakllsch Exp $  */
 
 /*-
  * Copyright (c) 2003 The NetBSD Foundation, Inc.
@@ -56,7 +56,7 @@
        # do int15, function 0xc0 call to discover if C7h is supported
        movb    $0xc0, %ah
        int     $0x15
-       setc    %bl
+       setc    %cl
        jc      out             # 0xc0 not supported if carry set
 
        # check feature byte 2, bit 4 to see if return memory map is supported
@@ -64,8 +64,8 @@
        andb    $0x10, %al
        jnz     getmem          # 0xc7 supported
        
-       # set %bl to indicate failure, and exit
-       movb    $2, %bl
+       # set %cl to indicate failure, and exit
+       movb    $2, %cl
        jmp     out
 
 getmem:
@@ -81,15 +81,14 @@
        # actually call int15, function 0xc7 now
        movb    $0xc7, %ah
        int     $0x15
-       setc    %bl             # save carry
+       setc    %cl             # save carry
        pop     %ds
 
 out:
        calll   _C_LABEL(real_to_prot)
        .code32
 
-       xorl    %eax, %eax
-       movb    %bl, %al        # return value in %ax
+       movzbl  %cl, %eax       # return value in %eax
 
        pop     %edi
        pop     %esi