diff options
| author | Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> | 2008-05-27 10:19:08 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-07-20 12:42:27 +0300 |
| commit | 954cd36f7613ac6d084abe33114dd45a8e0dbe92 (patch) | |
| tree | 85f69477e28d69fb8e2584fd8c8c26275da8194b /arch/x86 | |
| parent | 89c696383d6eb493351a89d450d8ad7a55cbe1da (diff) | |
KVM: x86 emulator: add support for jmp far 0xea
Add support for jmp far (opcode 0xea) instruction.
Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Laurent Vivier <laurent.vivier@bull.net>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/x86_emulate.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index a928aa6cdad..48b62cc3bd0 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -168,7 +168,8 @@ static u16 opcode_table[256] = { /* 0xE0 - 0xE7 */ 0, 0, 0, 0, 0, 0, 0, 0, /* 0xE8 - 0xEF */ - ImplicitOps | Stack, SrcImm|ImplicitOps, 0, SrcImmByte|ImplicitOps, + ImplicitOps | Stack, SrcImm | ImplicitOps, + ImplicitOps, SrcImmByte | ImplicitOps, 0, 0, 0, 0, /* 0xF0 - 0xF7 */ 0, 0, 0, 0, @@ -1661,7 +1662,33 @@ special_insn: break; } case 0xe9: /* jmp rel */ - case 0xeb: /* jmp rel short */ + goto jmp; + case 0xea: /* jmp far */ { + uint32_t eip; + uint16_t sel; + + switch (c->op_bytes) { + case 2: + eip = insn_fetch(u16, 2, c->eip); + break; + case 4: + eip = insn_fetch(u32, 4, c->eip); + break; + default: + DPRINTF("jmp far: Invalid op_bytes\n"); + goto cannot_emulate; + } + sel = insn_fetch(u16, 2, c->eip); + if (kvm_load_segment_descriptor(ctxt->vcpu, sel, 9, VCPU_SREG_CS) < 0) { + DPRINTF("jmp far: Failed to load CS descriptor\n"); + goto cannot_emulate; + } + + c->eip = eip; + break; + } + case 0xeb: + jmp: /* jmp rel short */ jmp_rel(c, c->src.val); c->dst.type = OP_NONE; /* Disable writeback. */ break; |