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[romprefix] Preserve %edi when issuing INT 1A,B101

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INT 1A,B101 (get PCI BIOS version) will overwrite %edi.
This commit is contained in:
Michael Brown
2008-08-26 05:03:19 +01:00
parent 07581d3faa
commit d5732b0272
1 changed files with 3 additions and 1 deletions
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4
src/arch/i386/prefix/romprefix.S
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@@ -177,6 +177,7 @@ init:
/* Check for PCI BIOS version */ /* Check for PCI BIOS version */
pushl %ebx pushl %ebx
pushl %edx pushl %edx
pushl %edi
stc stc
movw $0xb101, %ax movw $0xb101, %ax
int $0x1a int $0x1a
@@ -199,7 +200,8 @@ init:
1: /* PCI <3.0: set %gs (runtime segment) = %cs (init-time segment) */ 1: /* PCI <3.0: set %gs (runtime segment) = %cs (init-time segment) */
pushw %cs pushw %cs
popw %gs popw %gs
2: popl %edx 2: popl %edi
popl %edx
popl %ebx popl %ebx
/* Check for PnP BIOS */ /* Check for PnP BIOS */