aboutsummaryrefslogtreecommitdiff
path: root/target/i386/emulate/x86_emu.c
diff options
context:
space:
mode:
Diffstat (limited to 'target/i386/emulate/x86_emu.c')
-rw-r--r--target/i386/emulate/x86_emu.c129
1 files changed, 67 insertions, 62 deletions
diff --git a/target/i386/emulate/x86_emu.c b/target/i386/emulate/x86_emu.c
index 26a4876..db7a7f7 100644
--- a/target/i386/emulate/x86_emu.c
+++ b/target/i386/emulate/x86_emu.c
@@ -31,8 +31,8 @@
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA
+// License along with this library; if not, see
+// <https://www.gnu.org/licenses/>.
/////////////////////////////////////////////////////////////////////////
#include "qemu/osdep.h"
@@ -52,7 +52,7 @@
uint8_t v2 = (uint8_t)decode->op[1].val; \
uint8_t diff = v1 cmd v2; \
if (save_res) { \
- write_val_ext(env, decode->op[0].ptr, diff, 1); \
+ write_val_ext(env, &decode->op[0], diff, 1); \
} \
FLAGS_FUNC##8(env, v1, v2, diff); \
break; \
@@ -63,7 +63,7 @@
uint16_t v2 = (uint16_t)decode->op[1].val; \
uint16_t diff = v1 cmd v2; \
if (save_res) { \
- write_val_ext(env, decode->op[0].ptr, diff, 2); \
+ write_val_ext(env, &decode->op[0], diff, 2); \
} \
FLAGS_FUNC##16(env, v1, v2, diff); \
break; \
@@ -74,7 +74,7 @@
uint32_t v2 = (uint32_t)decode->op[1].val; \
uint32_t diff = v1 cmd v2; \
if (save_res) { \
- write_val_ext(env, decode->op[0].ptr, diff, 4); \
+ write_val_ext(env, &decode->op[0], diff, 4); \
} \
FLAGS_FUNC##32(env, v1, v2, diff); \
break; \
@@ -121,7 +121,7 @@ void write_reg(CPUX86State *env, int reg, target_ulong val, int size)
}
}
-target_ulong read_val_from_reg(target_ulong reg_ptr, int size)
+target_ulong read_val_from_reg(void *reg_ptr, int size)
{
target_ulong val;
@@ -144,7 +144,7 @@ target_ulong read_val_from_reg(target_ulong reg_ptr, int size)
return val;
}
-void write_val_to_reg(target_ulong reg_ptr, target_ulong val, int size)
+void write_val_to_reg(void *reg_ptr, target_ulong val, int size)
{
switch (size) {
case 1:
@@ -164,18 +164,18 @@ void write_val_to_reg(target_ulong reg_ptr, target_ulong val, int size)
}
}
-static bool is_host_reg(CPUX86State *env, target_ulong ptr)
+static void write_val_to_mem(CPUX86State *env, target_ulong ptr, target_ulong val, int size)
{
- return (ptr - (target_ulong)&env->regs[0]) < sizeof(env->regs);
+ emul_ops->write_mem(env_cpu(env), &val, ptr, size);
}
-void write_val_ext(CPUX86State *env, target_ulong ptr, target_ulong val, int size)
+void write_val_ext(CPUX86State *env, struct x86_decode_op *decode, target_ulong val, int size)
{
- if (is_host_reg(env, ptr)) {
- write_val_to_reg(ptr, val, size);
- return;
+ if (decode->type == X86_VAR_REG) {
+ write_val_to_reg(decode->regptr, val, size);
+ } else {
+ write_val_to_mem(env, decode->addr, val, size);
}
- emul_ops->write_mem(env_cpu(env), &val, ptr, size);
}
uint8_t *read_mmio(CPUX86State *env, target_ulong ptr, int bytes)
@@ -185,15 +185,11 @@ uint8_t *read_mmio(CPUX86State *env, target_ulong ptr, int bytes)
}
-target_ulong read_val_ext(CPUX86State *env, target_ulong ptr, int size)
+static target_ulong read_val_from_mem(CPUX86State *env, target_long ptr, int size)
{
target_ulong val;
uint8_t *mmio_ptr;
- if (is_host_reg(env, ptr)) {
- return read_val_from_reg(ptr, size);
- }
-
mmio_ptr = read_mmio(env, ptr, size);
switch (size) {
case 1:
@@ -215,6 +211,15 @@ target_ulong read_val_ext(CPUX86State *env, target_ulong ptr, int size)
return val;
}
+target_ulong read_val_ext(CPUX86State *env, struct x86_decode_op *decode, int size)
+{
+ if (decode->type == X86_VAR_REG) {
+ return read_val_from_reg(decode->regptr, size);
+ } else {
+ return read_val_from_mem(env, decode->addr, size);
+ }
+}
+
static void fetch_operands(CPUX86State *env, struct x86_decode *decode,
int n, bool val_op0, bool val_op1, bool val_op2)
{
@@ -226,25 +231,25 @@ static void fetch_operands(CPUX86State *env, struct x86_decode *decode,
case X86_VAR_IMMEDIATE:
break;
case X86_VAR_REG:
- VM_PANIC_ON(!decode->op[i].ptr);
+ VM_PANIC_ON(!decode->op[i].regptr);
if (calc_val[i]) {
- decode->op[i].val = read_val_from_reg(decode->op[i].ptr,
+ decode->op[i].val = read_val_from_reg(decode->op[i].regptr,
decode->operand_size);
}
break;
case X86_VAR_RM:
calc_modrm_operand(env, decode, &decode->op[i]);
if (calc_val[i]) {
- decode->op[i].val = read_val_ext(env, decode->op[i].ptr,
+ decode->op[i].val = read_val_ext(env, &decode->op[i],
decode->operand_size);
}
break;
case X86_VAR_OFFSET:
- decode->op[i].ptr = decode_linear_addr(env, decode,
- decode->op[i].ptr,
- R_DS);
+ decode->op[i].addr = decode_linear_addr(env, decode,
+ decode->op[i].addr,
+ R_DS);
if (calc_val[i]) {
- decode->op[i].val = read_val_ext(env, decode->op[i].ptr,
+ decode->op[i].val = read_val_ext(env, &decode->op[i],
decode->operand_size);
}
break;
@@ -257,7 +262,7 @@ static void fetch_operands(CPUX86State *env, struct x86_decode *decode,
static void exec_mov(CPUX86State *env, struct x86_decode *decode)
{
fetch_operands(env, decode, 2, false, true, false);
- write_val_ext(env, decode->op[0].ptr, decode->op[1].val,
+ write_val_ext(env, &decode->op[0], decode->op[1].val,
decode->operand_size);
env->eip += decode->len;
@@ -312,7 +317,7 @@ static void exec_neg(CPUX86State *env, struct x86_decode *decode)
fetch_operands(env, decode, 2, true, true, false);
val = 0 - sign(decode->op[1].val, decode->operand_size);
- write_val_ext(env, decode->op[1].ptr, val, decode->operand_size);
+ write_val_ext(env, &decode->op[1], val, decode->operand_size);
if (4 == decode->operand_size) {
SET_FLAGS_OSZAPC_SUB32(env, 0, 0 - val, val);
@@ -363,7 +368,7 @@ static void exec_not(CPUX86State *env, struct x86_decode *decode)
{
fetch_operands(env, decode, 1, true, false, false);
- write_val_ext(env, decode->op[0].ptr, ~decode->op[0].val,
+ write_val_ext(env, &decode->op[0], ~decode->op[0].val,
decode->operand_size);
env->eip += decode->len;
}
@@ -382,8 +387,8 @@ void exec_movzx(CPUX86State *env, struct x86_decode *decode)
}
decode->operand_size = src_op_size;
calc_modrm_operand(env, decode, &decode->op[1]);
- decode->op[1].val = read_val_ext(env, decode->op[1].ptr, src_op_size);
- write_val_ext(env, decode->op[0].ptr, decode->op[1].val, op_size);
+ decode->op[1].val = read_val_ext(env, &decode->op[1], src_op_size);
+ write_val_ext(env, &decode->op[0], decode->op[1].val, op_size);
env->eip += decode->len;
}
@@ -469,10 +474,10 @@ static inline void string_rep(CPUX86State *env, struct x86_decode *decode,
while (rcx--) {
func(env, decode);
write_reg(env, R_ECX, rcx, decode->addressing_size);
- if ((PREFIX_REP == rep) && !get_ZF(env)) {
+ if ((PREFIX_REP == rep) && !env->cc_dst) {
break;
}
- if ((PREFIX_REPN == rep) && get_ZF(env)) {
+ if ((PREFIX_REPN == rep) && env->cc_dst) {
break;
}
}
@@ -535,8 +540,8 @@ static void exec_movs_single(CPUX86State *env, struct x86_decode *decode)
dst_addr = linear_addr_size(env_cpu(env), RDI(env),
decode->addressing_size, R_ES);
- val = read_val_ext(env, src_addr, decode->operand_size);
- write_val_ext(env, dst_addr, val, decode->operand_size);
+ val = read_val_from_mem(env, src_addr, decode->operand_size);
+ write_val_to_mem(env, dst_addr, val, decode->operand_size);
string_increment_reg(env, R_ESI, decode);
string_increment_reg(env, R_EDI, decode);
@@ -563,9 +568,9 @@ static void exec_cmps_single(CPUX86State *env, struct x86_decode *decode)
decode->addressing_size, R_ES);
decode->op[0].type = X86_VAR_IMMEDIATE;
- decode->op[0].val = read_val_ext(env, src_addr, decode->operand_size);
+ decode->op[0].val = read_val_from_mem(env, src_addr, decode->operand_size);
decode->op[1].type = X86_VAR_IMMEDIATE;
- decode->op[1].val = read_val_ext(env, dst_addr, decode->operand_size);
+ decode->op[1].val = read_val_from_mem(env, dst_addr, decode->operand_size);
EXEC_2OP_FLAGS_CMD(env, decode, -, SET_FLAGS_OSZAPC_SUB, false);
@@ -697,15 +702,15 @@ static void do_bt(CPUX86State *env, struct x86_decode *decode, int flag)
if (decode->op[0].type != X86_VAR_REG) {
if (4 == decode->operand_size) {
displacement = ((int32_t) (decode->op[1].val & 0xffffffe0)) / 32;
- decode->op[0].ptr += 4 * displacement;
+ decode->op[0].addr += 4 * displacement;
} else if (2 == decode->operand_size) {
displacement = ((int16_t) (decode->op[1].val & 0xfff0)) / 16;
- decode->op[0].ptr += 2 * displacement;
+ decode->op[0].addr += 2 * displacement;
} else {
VM_PANIC("bt 64bit\n");
}
}
- decode->op[0].val = read_val_ext(env, decode->op[0].ptr,
+ decode->op[0].val = read_val_ext(env, &decode->op[0],
decode->operand_size);
cf = (decode->op[0].val >> index) & 0x01;
@@ -723,7 +728,7 @@ static void do_bt(CPUX86State *env, struct x86_decode *decode, int flag)
decode->op[0].val &= ~(1u << index);
break;
}
- write_val_ext(env, decode->op[0].ptr, decode->op[0].val,
+ write_val_ext(env, &decode->op[0], decode->op[0].val,
decode->operand_size);
set_CF(env, cf);
}
@@ -775,7 +780,7 @@ void exec_shl(CPUX86State *env, struct x86_decode *decode)
of = cf ^ (res >> 7);
}
- write_val_ext(env, decode->op[0].ptr, res, 1);
+ write_val_ext(env, &decode->op[0], res, 1);
SET_FLAGS_OSZAPC_LOGIC8(env, 0, 0, res);
SET_FLAGS_OxxxxC(env, of, cf);
break;
@@ -791,7 +796,7 @@ void exec_shl(CPUX86State *env, struct x86_decode *decode)
of = cf ^ (res >> 15); /* of = cf ^ result15 */
}
- write_val_ext(env, decode->op[0].ptr, res, 2);
+ write_val_ext(env, &decode->op[0], res, 2);
SET_FLAGS_OSZAPC_LOGIC16(env, 0, 0, res);
SET_FLAGS_OxxxxC(env, of, cf);
break;
@@ -800,7 +805,7 @@ void exec_shl(CPUX86State *env, struct x86_decode *decode)
{
uint32_t res = decode->op[0].val << count;
- write_val_ext(env, decode->op[0].ptr, res, 4);
+ write_val_ext(env, &decode->op[0], res, 4);
SET_FLAGS_OSZAPC_LOGIC32(env, 0, 0, res);
cf = (decode->op[0].val >> (32 - count)) & 0x1;
of = cf ^ (res >> 31); /* of = cf ^ result31 */
@@ -831,10 +836,10 @@ void exec_movsx(CPUX86State *env, struct x86_decode *decode)
decode->operand_size = src_op_size;
calc_modrm_operand(env, decode, &decode->op[1]);
- decode->op[1].val = sign(read_val_ext(env, decode->op[1].ptr, src_op_size),
+ decode->op[1].val = sign(read_val_ext(env, &decode->op[1], src_op_size),
src_op_size);
- write_val_ext(env, decode->op[0].ptr, decode->op[1].val, op_size);
+ write_val_ext(env, &decode->op[0], decode->op[1].val, op_size);
env->eip += decode->len;
}
@@ -862,7 +867,7 @@ void exec_ror(CPUX86State *env, struct x86_decode *decode)
count &= 0x7; /* use only bottom 3 bits */
res = ((uint8_t)decode->op[0].val >> count) |
((uint8_t)decode->op[0].val << (8 - count));
- write_val_ext(env, decode->op[0].ptr, res, 1);
+ write_val_ext(env, &decode->op[0], res, 1);
bit6 = (res >> 6) & 1;
bit7 = (res >> 7) & 1;
/* set eflags: ROR count affects the following flags: C, O */
@@ -886,7 +891,7 @@ void exec_ror(CPUX86State *env, struct x86_decode *decode)
count &= 0x0f; /* use only 4 LSB's */
res = ((uint16_t)decode->op[0].val >> count) |
((uint16_t)decode->op[0].val << (16 - count));
- write_val_ext(env, decode->op[0].ptr, res, 2);
+ write_val_ext(env, &decode->op[0], res, 2);
bit14 = (res >> 14) & 1;
bit15 = (res >> 15) & 1;
@@ -904,7 +909,7 @@ void exec_ror(CPUX86State *env, struct x86_decode *decode)
if (count) {
res = ((uint32_t)decode->op[0].val >> count) |
((uint32_t)decode->op[0].val << (32 - count));
- write_val_ext(env, decode->op[0].ptr, res, 4);
+ write_val_ext(env, &decode->op[0], res, 4);
bit31 = (res >> 31) & 1;
bit30 = (res >> 30) & 1;
@@ -941,7 +946,7 @@ void exec_rol(CPUX86State *env, struct x86_decode *decode)
res = ((uint8_t)decode->op[0].val << count) |
((uint8_t)decode->op[0].val >> (8 - count));
- write_val_ext(env, decode->op[0].ptr, res, 1);
+ write_val_ext(env, &decode->op[0], res, 1);
/* set eflags:
* ROL count affects the following flags: C, O
*/
@@ -968,7 +973,7 @@ void exec_rol(CPUX86State *env, struct x86_decode *decode)
res = ((uint16_t)decode->op[0].val << count) |
((uint16_t)decode->op[0].val >> (16 - count));
- write_val_ext(env, decode->op[0].ptr, res, 2);
+ write_val_ext(env, &decode->op[0], res, 2);
bit0 = (res & 0x1);
bit15 = (res >> 15);
/* of = cf ^ result15 */
@@ -986,7 +991,7 @@ void exec_rol(CPUX86State *env, struct x86_decode *decode)
res = ((uint32_t)decode->op[0].val << count) |
((uint32_t)decode->op[0].val >> (32 - count));
- write_val_ext(env, decode->op[0].ptr, res, 4);
+ write_val_ext(env, &decode->op[0], res, 4);
bit0 = (res & 0x1);
bit31 = (res >> 31);
/* of = cf ^ result31 */
@@ -1024,7 +1029,7 @@ void exec_rcl(CPUX86State *env, struct x86_decode *decode)
(op1_8 >> (9 - count));
}
- write_val_ext(env, decode->op[0].ptr, res, 1);
+ write_val_ext(env, &decode->op[0], res, 1);
cf = (op1_8 >> (8 - count)) & 0x01;
of = cf ^ (res >> 7); /* of = cf ^ result7 */
@@ -1050,7 +1055,7 @@ void exec_rcl(CPUX86State *env, struct x86_decode *decode)
(op1_16 >> (17 - count));
}
- write_val_ext(env, decode->op[0].ptr, res, 2);
+ write_val_ext(env, &decode->op[0], res, 2);
cf = (op1_16 >> (16 - count)) & 0x1;
of = cf ^ (res >> 15); /* of = cf ^ result15 */
@@ -1073,7 +1078,7 @@ void exec_rcl(CPUX86State *env, struct x86_decode *decode)
(op1_32 >> (33 - count));
}
- write_val_ext(env, decode->op[0].ptr, res, 4);
+ write_val_ext(env, &decode->op[0], res, 4);
cf = (op1_32 >> (32 - count)) & 0x1;
of = cf ^ (res >> 31); /* of = cf ^ result31 */
@@ -1105,7 +1110,7 @@ void exec_rcr(CPUX86State *env, struct x86_decode *decode)
res = (op1_8 >> count) | (get_CF(env) << (8 - count)) |
(op1_8 << (9 - count));
- write_val_ext(env, decode->op[0].ptr, res, 1);
+ write_val_ext(env, &decode->op[0], res, 1);
cf = (op1_8 >> (count - 1)) & 0x1;
of = (((res << 1) ^ res) >> 7) & 0x1; /* of = result6 ^ result7 */
@@ -1124,7 +1129,7 @@ void exec_rcr(CPUX86State *env, struct x86_decode *decode)
res = (op1_16 >> count) | (get_CF(env) << (16 - count)) |
(op1_16 << (17 - count));
- write_val_ext(env, decode->op[0].ptr, res, 2);
+ write_val_ext(env, &decode->op[0], res, 2);
cf = (op1_16 >> (count - 1)) & 0x1;
of = ((uint16_t)((res << 1) ^ res) >> 15) & 0x1; /* of = result15 ^
@@ -1148,7 +1153,7 @@ void exec_rcr(CPUX86State *env, struct x86_decode *decode)
(op1_32 << (33 - count));
}
- write_val_ext(env, decode->op[0].ptr, res, 4);
+ write_val_ext(env, &decode->op[0], res, 4);
cf = (op1_32 >> (count - 1)) & 0x1;
of = ((res << 1) ^ res) >> 31; /* of = result30 ^ result31 */
@@ -1163,9 +1168,9 @@ static void exec_xchg(CPUX86State *env, struct x86_decode *decode)
{
fetch_operands(env, decode, 2, true, true, false);
- write_val_ext(env, decode->op[0].ptr, decode->op[1].val,
+ write_val_ext(env, &decode->op[0], decode->op[1].val,
decode->operand_size);
- write_val_ext(env, decode->op[1].ptr, decode->op[0].val,
+ write_val_ext(env, &decode->op[1], decode->op[0].val,
decode->operand_size);
env->eip += decode->len;
@@ -1174,7 +1179,7 @@ static void exec_xchg(CPUX86State *env, struct x86_decode *decode)
static void exec_xadd(CPUX86State *env, struct x86_decode *decode)
{
EXEC_2OP_FLAGS_CMD(env, decode, +, SET_FLAGS_OSZAPC_ADD, true);
- write_val_ext(env, decode->op[1].ptr, decode->op[0].val,
+ write_val_ext(env, &decode->op[1], decode->op[0].val,
decode->operand_size);
env->eip += decode->len;
@@ -1241,7 +1246,7 @@ static void init_cmd_handler(void)
bool exec_instruction(CPUX86State *env, struct x86_decode *ins)
{
if (!_cmd_handler[ins->cmd].handler) {
- printf("Unimplemented handler (%llx) for %d (%x %x) \n", env->eip,
+ printf("Unimplemented handler (" TARGET_FMT_lx ") for %d (%x %x) \n", env->eip,
ins->cmd, ins->opcode[0],
ins->opcode_len > 1 ? ins->opcode[1] : 0);
env->eip += ins->len;
generated by cgit v1.1 at 2025-07-03 01:18:44 +0000