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authorSimon Glass <sjg@chromium.org>2014-11-14 20:56:43 -0700
committerSimon Glass <sjg@chromium.org>2014-11-25 07:11:17 -0700
commit8c6ec412b450ad790fc373674a34313c8f6e3f6e (patch)
tree882cbd362c562a41f3eb689a6a45b3d95e19a69c
parentb3521f2e495c8cd91226af9b34f2d7ef5a24c665 (diff)
downloadblackbird-obmc-uboot-8c6ec412b450ad790fc373674a34313c8f6e3f6e.tar.gz
blackbird-obmc-uboot-8c6ec412b450ad790fc373674a34313c8f6e3f6e.zip
bios_emulator: Always print errors when opcode decode fails
This is a rare event and should not happen. When it does it is confusing to work out why. At least we should print a message. Adjust the emulator to always print decode errors to the console. Signed-off-by: Simon Glass <sjg@chromium.org>
-rw-r--r--drivers/bios_emulator/include/x86emu/debug.h6
-rw-r--r--drivers/bios_emulator/x86emu/ops.c30
-rw-r--r--drivers/bios_emulator/x86emu/ops2.c4
3 files changed, 22 insertions, 18 deletions
diff --git a/drivers/bios_emulator/include/x86emu/debug.h b/drivers/bios_emulator/include/x86emu/debug.h
index 12d6c7ffd7..304b2bf007 100644
--- a/drivers/bios_emulator/include/x86emu/debug.h
+++ b/drivers/bios_emulator/include/x86emu/debug.h
@@ -99,7 +99,11 @@
# define DEBUG_DECODE_NOPRINT() 0
#endif
-#ifdef CONFIG_X86EMU_DEBUG
+# define ERR_PRINTF(x) printf(x)
+# define ERR_PRINTF2(x, y) printf(x, y)
+
+#ifdef CONFIG_X86EMU_DEBUG103
+
# define DECODE_PRINTF(x) if (DEBUG_DECODE()) \
x86emu_decode_printf(x)
diff --git a/drivers/bios_emulator/x86emu/ops.c b/drivers/bios_emulator/x86emu/ops.c
index c853260198..2bb5e2d9d5 100644
--- a/drivers/bios_emulator/x86emu/ops.c
+++ b/drivers/bios_emulator/x86emu/ops.c
@@ -179,7 +179,7 @@ void x86emuOp_illegal_op(
{
START_OF_INSTR();
if (M.x86.R_SP != 0) {
- DECODE_PRINTF("ILLEGAL X86 OPCODE\n");
+ ERR_PRINTF("ILLEGAL X86 OPCODE\n");
TRACE_REGS();
DB( printk("%04x:%04x: %02X ILLEGAL X86 OPCODE!\n",
M.x86.R_CS, M.x86.R_IP-1,op1));
@@ -2148,7 +2148,7 @@ void x86emuOp_pop_RM(u8 X86EMU_UNUSED(op1))
DECODE_PRINTF("POP\t");
FETCH_DECODE_MODRM(mod, rh, rl);
if (rh != 0) {
- DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
+ ERR_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
HALT_SYS();
}
if (mod < 3) {
@@ -3347,7 +3347,7 @@ void x86emuOp_mov_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
DECODE_PRINTF("MOV\t");
FETCH_DECODE_MODRM(mod, rh, rl);
if (rh != 0) {
- DECODE_PRINTF("ILLEGAL DECODE OF OPCODE c6\n");
+ ERR_PRINTF("ILLEGAL DECODE OF OPCODE c6\n");
HALT_SYS();
}
if (mod < 3) {
@@ -3381,7 +3381,7 @@ void x86emuOp_mov_word_RM_IMM(u8 X86EMU_UNUSED(op1))
DECODE_PRINTF("MOV\t");
FETCH_DECODE_MODRM(mod, rh, rl);
if (rh != 0) {
- DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
+ ERR_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
HALT_SYS();
}
if (mod < 3) {
@@ -3968,7 +3968,7 @@ void x86emuOp_aam(u8 X86EMU_UNUSED(op1))
DECODE_PRINTF("AAM\n");
a = fetch_byte_imm(); /* this is a stupid encoding. */
if (a != 10) {
- DECODE_PRINTF("ERROR DECODING AAM\n");
+ ERR_PRINTF("ERROR DECODING AAM\n");
TRACE_REGS();
HALT_SYS();
}
@@ -4443,7 +4443,7 @@ void x86emuOp_opcF6_byte_RM(u8 X86EMU_UNUSED(op1))
test_byte(destval, srcval);
break;
case 1:
- DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ ERR_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
HALT_SYS();
break;
case 2:
@@ -4490,7 +4490,7 @@ void x86emuOp_opcF6_byte_RM(u8 X86EMU_UNUSED(op1))
test_byte(*destreg, srcval);
break;
case 1:
- DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ ERR_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
HALT_SYS();
break;
case 2:
@@ -4559,7 +4559,7 @@ void x86emuOp_opcF7_word_RM(u8 X86EMU_UNUSED(op1))
test_long(destval, srcval);
break;
case 1:
- DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n");
+ ERR_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n");
HALT_SYS();
break;
case 2:
@@ -4611,7 +4611,7 @@ void x86emuOp_opcF7_word_RM(u8 X86EMU_UNUSED(op1))
test_word(destval, srcval);
break;
case 1:
- DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n");
+ ERR_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n");
HALT_SYS();
break;
case 2:
@@ -4666,7 +4666,7 @@ void x86emuOp_opcF7_word_RM(u8 X86EMU_UNUSED(op1))
test_long(*destreg, srcval);
break;
case 1:
- DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ ERR_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
HALT_SYS();
break;
case 2:
@@ -4715,7 +4715,7 @@ void x86emuOp_opcF7_word_RM(u8 X86EMU_UNUSED(op1))
test_word(*destreg, srcval);
break;
case 1:
- DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ ERR_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
HALT_SYS();
break;
case 2:
@@ -4879,7 +4879,7 @@ void x86emuOp_opcFE_byte_RM(u8 X86EMU_UNUSED(op1))
case 5:
case 6:
case 7:
- DECODE_PRINTF2("ILLEGAL OP MAJOR OP 0xFE MINOR OP %x \n", mod);
+ ERR_PRINTF2("ILLEGAL OP MAJOR OP 0xFE MINOR OP %x\n", mod);
HALT_SYS();
break;
}
@@ -4961,7 +4961,7 @@ void x86emuOp_opcFF_word_RM(u8 X86EMU_UNUSED(op1))
DECODE_PRINTF("PUSH\t");
break;
case 7:
- DECODE_PRINTF("ILLEGAL DECODING OF OPCODE FF\t");
+ ERR_PRINTF("ILLEGAL DECODING OF OPCODE FF\t");
HALT_SYS();
break;
}
@@ -5092,7 +5092,7 @@ void x86emuOp_opcFF_word_RM(u8 X86EMU_UNUSED(op1))
M.x86.R_IP = *destreg;
break;
case 3: /* jmp far ptr ... */
- DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n");
+ ERR_PRINTF("OPERATION UNDEFINED 0XFF\n");
TRACE_AND_STEP();
HALT_SYS();
break;
@@ -5104,7 +5104,7 @@ void x86emuOp_opcFF_word_RM(u8 X86EMU_UNUSED(op1))
M.x86.R_IP = (u16) (*destreg);
break;
case 5: /* jmp far ptr ... */
- DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n");
+ ERR_PRINTF("OPERATION UNDEFINED 0XFF\n");
TRACE_AND_STEP();
HALT_SYS();
break;
diff --git a/drivers/bios_emulator/x86emu/ops2.c b/drivers/bios_emulator/x86emu/ops2.c
index 59dbb422dd..be4ef36443 100644
--- a/drivers/bios_emulator/x86emu/ops2.c
+++ b/drivers/bios_emulator/x86emu/ops2.c
@@ -58,7 +58,7 @@ void x86emuOp2_illegal_op(
u8 op2)
{
START_OF_INSTR();
- DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n");
+ ERR_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n");
TRACE_REGS();
printk("%04x:%04x: %02X ILLEGAL EXTENDED X86 OPCODE!\n",
M.x86.R_CS, M.x86.R_IP-2,op2);
@@ -1089,7 +1089,7 @@ void x86emuOp2_btX_I(u8 X86EMU_UNUSED(op2))
DECODE_PRINTF("BTC\t");
break;
default:
- DECODE_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n");
+ ERR_PRINTF("ILLEGAL EXTENDED X86 OPCODE\n");
TRACE_REGS();
printk("%04x:%04x: %02X%02X ILLEGAL EXTENDED X86 OPCODE EXTENSION!\n",
M.x86.R_CS, M.x86.R_IP-3,op2, (mod<<6)|(rh<<3)|rl);
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