Author: tychon
Date: Thu Jun 26 17:15:41 2014
New Revision: 267921
URL: http://svnweb.freebsd.org/changeset/base/267921
Log:
Add support for emulating the move instruction: "mov r/m8, imm8".
Reviewed by: neel
Modified:
head/sys/amd64/vmm/vmm_instruction_emul.c
Modified: head/sys/amd64/vmm/vmm_instruction_emul.c
==============================================================================
--- head/sys/amd64/vmm/vmm_instruction_emul.c Thu Jun 26 17:10:07 2014
(r267920)
+++ head/sys/amd64/vmm/vmm_instruction_emul.c Thu Jun 26 17:15:41 2014
(r267921)
@@ -104,6 +104,12 @@ static const struct vie_op one_byte_opco
.op_byte = 0x8B,
.op_type = VIE_OP_TYPE_MOV,
},
+ [0xC6] = {
+ /* XXX Group 11 extended opcode - not just MOV */
+ .op_byte = 0xC6,
+ .op_type = VIE_OP_TYPE_MOV,
+ .op_flags = VIE_OP_F_IMM8,
+ },
[0xC7] = {
.op_byte = 0xC7,
.op_type = VIE_OP_TYPE_MOV,
@@ -310,6 +316,15 @@ emulate_mov(void *vm, int vcpuid, uint64
error = vie_update_register(vm, vcpuid, reg, val, size);
}
break;
+ case 0xC6:
+ /*
+ * MOV from imm8 to mem (ModRM:r/m)
+ * C6/0 mov r/m8, imm8
+ * REX + C6/0 mov r/m8, imm8
+ */
+ size = 1;
+ error = memwrite(vm, vcpuid, gpa, vie->immediate, size, arg);
+ break;
case 0xC7:
/*
* MOV from imm32 to mem (ModRM:r/m)
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