[Xen-changelog] [xen-unstable] hvm rombios: Fix int15, func 0x86 (udelay).

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1177413238 -3600
# Node ID f71d167a6c6d7038fedc3d748db334f8ebba6467
# Parent  a7bd11fd5b1b6f4a82135db09dfe654e8966fabe
hvm rombios: Fix int15, func 0x86 (udelay).
Was reading argument from wrong stack location with recent versions of
bcc. Doing the access from [bp] rather than [sp] is safer as the
former does not change all the time.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 tools/firmware/rombios/rombios.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diff -r a7bd11fd5b1b -r f71d167a6c6d tools/firmware/rombios/rombios.c
--- a/tools/firmware/rombios/rombios.c  Tue Apr 24 12:12:48 2007 +0100
+++ b/tools/firmware/rombios/rombios.c  Tue Apr 24 12:13:58 2007 +0100
@@ -4157,15 +4157,12 @@ BX_DEBUG_INT15("int15 AX=%04x\n",regs.u.
       DX = regs.u.r16.dx;
 
 ASM_START
-      sti
-
       ;; Get the count in eax
-      mov  bx, sp
       SEG SS
-        mov  ax, _int15_function.CX [bx]
+        mov  ax, .int15_function32.CX [bp]
       shl  eax, #16
       SEG SS
-        mov  ax, _int15_function.DX [bx]
+        mov  ax, .int15_function32.DX [bp]
 
       ;; convert to numbers of 15usec ticks
       mov ebx, #15

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