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| author | Mohammed Gamal <m.gamal005@gmail.com> | 2008-09-01 04:52:24 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 10:15:25 +0200 |
| commit | fb4616f43148c5b3f3e453a47657572d1bda39ee (patch) | |
| tree | 875be2a5ef494832a577de867db623c3177ffe27 /arch/x86 | |
| parent | 20766c083e6ab3c33125f07c7ffe39914c106d98 (diff) | |
| download | op-kernel-dev-fb4616f43148c5b3f3e453a47657572d1bda39ee.zip op-kernel-dev-fb4616f43148c5b3f3e453a47657572d1bda39ee.tar.gz | |
KVM: x86 emulator: Add std and cld instructions (opcodes 0xfc-0xfd)
This adds the std and cld instructions to the emulator.
Encountered while running the BIOS with invalid guest
state emulation enabled.
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/x86_emulate.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index 66e0bd6..944f1f4 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -187,7 +187,7 @@ static u16 opcode_table[256] = { ImplicitOps, ImplicitOps, Group | Group3_Byte, Group | Group3, /* 0xF8 - 0xFF */ ImplicitOps, 0, ImplicitOps, ImplicitOps, - 0, 0, Group | Group4, Group | Group5, + ImplicitOps, ImplicitOps, Group | Group4, Group | Group5, }; static u16 twobyte_table[256] = { @@ -1762,6 +1762,14 @@ special_insn: ctxt->eflags |= X86_EFLAGS_IF; c->dst.type = OP_NONE; /* Disable writeback. */ break; + case 0xfc: /* cld */ + ctxt->eflags &= ~EFLG_DF; + c->dst.type = OP_NONE; /* Disable writeback. */ + break; + case 0xfd: /* std */ + ctxt->eflags |= EFLG_DF; + c->dst.type = OP_NONE; /* Disable writeback. */ + break; case 0xfe ... 0xff: /* Grp4/Grp5 */ rc = emulate_grp45(ctxt, ops); if (rc != 0) |
