[PATCH] x86emu: Respect the LEA 67h address size prefix.

[Aaron Plattner]

From: Christian Zander <chzander at nvidia.com>

Signed-off-by: Christian Zander <chzander at nvidia.com>
Signed-off-by: Aaron Plattner <aplattner at nvidia.com>
---
This change fixes console restore on some newer NVIDIA boards.  Tiago,
you'll want this in libx86 once it's reviewed.

 hw/xfree86/x86emu/ops.c |   70 ++++++++++++++++++++++++++++++-----------------
 1 files changed, 45 insertions(+), 25 deletions(-)

diff --git a/hw/xfree86/x86emu/ops.c b/hw/xfree86/x86emu/ops.c
index 37ae2c9..21a0347 100644
--- a/hw/xfree86/x86emu/ops.c
+++ b/hw/xfree86/x86emu/ops.c
@@ -6567,42 +6567,62 @@ Handles opcode 0x8d
 static void x86emuOp_lea_word_R_M(u8 X86EMU_UNUSED(op1))
 {
     int mod, rl, rh;
-    u16 *srcreg;
     uint destoffset;
 
-/*
- * TODO: Need to handle address size prefix!
- *
- * lea  eax,[eax+ebx*2] ??
- */
-    
     START_OF_INSTR();
     DECODE_PRINTF("LEA\t");
     FETCH_DECODE_MODRM(mod, rh, rl);
     switch (mod) {
     case 0:
-        srcreg = DECODE_RM_WORD_REGISTER(rh);
-        DECODE_PRINTF(",");
-        destoffset = decode_rm00_address(rl);
-        DECODE_PRINTF("\n");
-        TRACE_AND_STEP();
-        *srcreg = (u16)destoffset;
+        if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+            u32 *srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            destoffset = decode_rm00_address(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *srcreg = (u32)destoffset;
+        } else {
+            u16 *srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            destoffset = decode_rm00_address(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *srcreg = (u16)destoffset;
+        }
         break;
     case 1:
-        srcreg = DECODE_RM_WORD_REGISTER(rh);
-        DECODE_PRINTF(",");
-        destoffset = decode_rm01_address(rl);
-        DECODE_PRINTF("\n");
-        TRACE_AND_STEP();
-        *srcreg = (u16)destoffset;
+        if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+            u32 *srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            destoffset = decode_rm01_address(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *srcreg = (u32)destoffset;
+        } else {
+            u16 *srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            destoffset = decode_rm01_address(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *srcreg = (u16)destoffset;
+        }
         break;
     case 2:
-        srcreg = DECODE_RM_WORD_REGISTER(rh);
-        DECODE_PRINTF(",");
-        destoffset = decode_rm10_address(rl);
-        DECODE_PRINTF("\n");
-        TRACE_AND_STEP();
-        *srcreg = (u16)destoffset;
+        if (M.x86.mode & SYSMODE_PREFIX_ADDR) {
+            u32 *srcreg = DECODE_RM_LONG_REGISTER(rh);
+            DECODE_PRINTF(",");
+            destoffset = decode_rm10_address(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *srcreg = (u32)destoffset;
+        } else {
+            u16 *srcreg = DECODE_RM_WORD_REGISTER(rh);
+            DECODE_PRINTF(",");
+            destoffset = decode_rm10_address(rl);
+            DECODE_PRINTF("\n");
+            TRACE_AND_STEP();
+            *srcreg = (u16)destoffset;
+        }
         break;
     case 3:                     /* register to register */
         /* undefined.  Do nothing. */
-- 
1.6.3.3