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[HVM][MMIO] Support decode of 0x83 opcode (or imm8,m32/64').
This instruction is used by both WinXP during an SMP installation and by Sun Solaris. With this patch Sun Solaris UP is able to boot. Windows SMP gets a bit further but still has issues. Signed-off-by: Tom Woller <thomas.woller@amd.com> Signed-off-by: Travis Betak <tbetak.woller@amd.com>
This commit is contained in:
kaf24@firebug.cl.cam.ac.uk committed
1 parent
a47f6548d9
commit
93254fc385
1 file changed
+13
-2
@@ -426,19 +426,30 @@ static int hvm_decode(int realmode, unsigned char *opcode, struct instruction *i
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case 0x80:
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case 0x81:
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case 0x83:
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{
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unsigned char ins_subtype = (opcode[1] >> 3) & 7;
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if (opcode[0] == 0x80) {
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GET_OP_SIZE_FOR_BYTE(size_reg);
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instr->op_size = BYTE;
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} else {
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} else if (opcode[0] == 0x81) {
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GET_OP_SIZE_FOR_NONEBYTE(instr->op_size);
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size_reg = instr->op_size;
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} else if (opcode[0] == 0x83) {
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GET_OP_SIZE_FOR_NONEBYTE(size_reg);
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instr->op_size = size_reg;
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}
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/* opcode 0x83 always has a single byte operand */
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if (opcode[0] == 0x83)
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instr->immediate =
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(signed char)get_immediate(realmode, opcode+1, BYTE);
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else
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instr->immediate =
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get_immediate(realmode, opcode+1, instr->op_size);
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instr->operand[0] = mk_operand(size_reg, 0, 0, IMMEDIATE);
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instr->immediate = get_immediate(realmode, opcode+1, instr->op_size);
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instr->operand[1] = mk_operand(size_reg, 0, 0, MEMORY);
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switch (ins_subtype) {
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