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-rw-r--r--sys/i386/boot/biosboot/bios.S26
1 files changed, 25 insertions, 1 deletions
diff --git a/sys/i386/boot/biosboot/bios.S b/sys/i386/boot/biosboot/bios.S
index 3a45e85..a3ff7e2 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: bios.S,v 1.4 1994/11/18 05:02:12 phk Exp $
+ * $Id: bios.S,v 1.5 1995/09/03 05:36:13 julian Exp $
*/
/*
@@ -75,6 +75,8 @@ ENTRY(biosread)
mov %esp, %ebp
push %ebx
+ push %esi
+ push %edi
push %ecx
push %edx
push %es
@@ -112,6 +114,8 @@ ENTRY(biosread)
pop %es
pop %edx
pop %ecx
+ pop %edi
+ pop %esi
pop %ebx
pop %ebp
@@ -132,6 +136,8 @@ ENTRY(putc)
push %ebp
mov %esp, %ebp
push %ebx
+ push %esi
+ push %edi
push %ecx
movb 0x8(%ebp), %cl
@@ -150,6 +156,8 @@ ENTRY(putc)
call EXT(real_to_prot)
pop %ecx
+ pop %edi
+ pop %esi
pop %ebx
pop %ebp
ret
@@ -167,6 +175,8 @@ ENTRY(getc)
push %ebp
mov %esp, %ebp
push %ebx /* save %ebx */
+ push %esi
+ push %edi
call EXT(prot_to_real)
@@ -183,6 +193,8 @@ ENTRY(getc)
xor %eax, %eax
movb %bl, %al
+ pop %edi
+ pop %esi
pop %ebx
pop %ebp
ret
@@ -203,6 +215,8 @@ ENTRY(ischar)
push %ebp
mov %esp, %ebp
push %ebx
+ push %esi
+ push %edi
call EXT(prot_to_real) /* enter real mode */
@@ -222,6 +236,8 @@ nochar:
xor %eax, %eax
movb %bl, %al
+ pop %edi
+ pop %esi
pop %ebx
pop %ebp
ret
@@ -238,6 +254,8 @@ ENTRY(get_diskinfo)
mov %esp, %ebp
push %es
push %ebx
+ push %esi
+ push %edi
push %ecx
push %edx
@@ -290,6 +308,8 @@ ok:
pop %edx
pop %ecx
+ pop %edi
+ pop %esi
pop %ebx
pop %es
pop %ebp
@@ -309,6 +329,8 @@ ENTRY(memsize)
push %ebp
mov %esp, %ebp
push %ebx
+ push %esi
+ push %edi
mov 8(%ebp), %ebx
@@ -336,6 +358,8 @@ xdone:
call EXT(real_to_prot)
mov %ebx, %eax
+ pop %edi
+ pop %esi
pop %ebx
pop %ebp
ret
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