diff options
| author | Avi Kivity <avi@qumranet.com> | 2008-01-18 12:58:04 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 11:53:14 +0300 |
| commit | 7d858a19efe5844a98e060931570359b70dea6d1 (patch) | |
| tree | 62ee800fb0f1a8a976ab47b015717b34636f3275 /arch/x86/kvm | |
| parent | 43bb19cd3398d3f544d8e2d6ed6c5c5d7b4e5819 (diff) | |
KVM: x86 emulator: Group decoding for group 3
This adds group decoding support for opcodes 0xf6, 0xf7 (group 3).
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/x86_emulate.c | 34 |
1 files changed, 10 insertions, 24 deletions
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index cf1ce7c316a..52e65ae37f0 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -70,7 +70,7 @@ #define GroupMask 0xff /* Group number stored in bits 0:7 */ enum { - Group1A, + Group1A, Group3_Byte, Group3, }; static u16 opcode_table[256] = { @@ -171,8 +171,7 @@ static u16 opcode_table[256] = { 0, 0, 0, 0, /* 0xF0 - 0xF7 */ 0, 0, 0, 0, - ImplicitOps, ImplicitOps, - ByteOp | DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM, + ImplicitOps, ImplicitOps, Group | Group3_Byte, Group | Group3, /* 0xF8 - 0xFF */ ImplicitOps, 0, ImplicitOps, ImplicitOps, 0, 0, ByteOp | DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM @@ -239,6 +238,14 @@ static u16 twobyte_table[256] = { static u16 group_table[] = { [Group1A*8] = DstMem | SrcNone | ModRM | Mov | Stack, 0, 0, 0, 0, 0, 0, 0, + [Group3_Byte*8] = + ByteOp | SrcImm | DstMem | ModRM, 0, + ByteOp | DstMem | SrcNone | ModRM, ByteOp | DstMem | SrcNone | ModRM, + 0, 0, 0, 0, + [Group3*8] = + DstMem | SrcImm | ModRM | SrcImm, 0, + DstMem | SrcNone | ModRM, ByteOp | DstMem | SrcNone | ModRM, + 0, 0, 0, 0, }; static u16 group2_table[] = { @@ -1070,26 +1077,6 @@ static inline int emulate_grp3(struct x86_emulate_ctxt *ctxt, switch (c->modrm_reg) { case 0 ... 1: /* test */ - /* - * Special case in Grp3: test has an immediate - * source operand. - */ - c->src.type = OP_IMM; - c->src.ptr = (unsigned long *)c->eip; - c->src.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; - if (c->src.bytes == 8) - c->src.bytes = 4; - switch (c->src.bytes) { - case 1: - c->src.val = insn_fetch(s8, 1, c->eip); - break; - case 2: - c->src.val = insn_fetch(s16, 2, c->eip); - break; - case 4: - c->src.val = insn_fetch(s32, 4, c->eip); - break; - } emulate_2op_SrcV("test", c->src, c->dst, ctxt->eflags); break; case 2: /* not */ @@ -1103,7 +1090,6 @@ static inline int emulate_grp3(struct x86_emulate_ctxt *ctxt, rc = X86EMUL_UNHANDLEABLE; break; } -done: return rc; } |