iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: x86 emulator: sort opcodes into ascending order

Browse Source 
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Nitin A Kamble 2007-09-15 10:13:07 +03:00 committed by Avi Kivity
parent 054b136967
commit 7de752482c
1 changed files with 49 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

99
drivers/kvm/x86_emulate.c
View File

@ -978,19 +978,8 @@ push:
dst.val = src.val;
lock_prefix = 1;
break;
case 0xa0 ... 0xa1: /* mov */
dst.ptr = (unsigned long *)&_regs[VCPU_REGS_RAX];
dst.val = src.val;
_eip += ad_bytes; /* skip src displacement */
break;
case 0xa2 ... 0xa3: /* mov */
dst.val = (unsigned long)_regs[VCPU_REGS_RAX];
_eip += ad_bytes; /* skip dst displacement */
break;
case 0x88 ... 0x8b: /* mov */
case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */
dst.val = src.val;
break;
goto mov;
case 0x8f: /* pop (sole member of Grp1a) */
/* 64-bit mode: POP always pops a 64-bit operand. */
if (mode == X86EMUL_MODE_PROT64)
@ -1001,6 +990,15 @@ push:
goto done;
register_address_increment(_regs[VCPU_REGS_RSP], dst.bytes);
break;
case 0xa0 ... 0xa1: /* mov */
dst.ptr = (unsigned long *)&_regs[VCPU_REGS_RAX];
dst.val = src.val;
_eip += ad_bytes; /* skip src displacement */
break;
case 0xa2 ... 0xa3: /* mov */
dst.val = (unsigned long)_regs[VCPU_REGS_RAX];
_eip += ad_bytes; /* skip dst displacement */
break;
case 0xc0 ... 0xc1:
grp2: /* Grp2 */
switch (modrm_reg) {
@ -1028,6 +1026,10 @@ push:
break;
}
break;
case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */
mov:
dst.val = src.val;
break;
case 0xd0 ... 0xd1: /* Grp2 */
src.val = 1;
goto grp2;
@ -1186,6 +1188,17 @@ special_insn:
dst.ptr = (void *) register_address(
ctxt->ss_base, _regs[VCPU_REGS_RSP]);
break;
case 0x58 ... 0x5f: /* pop reg */
dst.ptr = (unsigned long *)&_regs[b & 0x7];
pop_instruction:
if ((rc = ops->read_std(register_address(ctxt->ss_base,
_regs[VCPU_REGS_RSP]), dst.ptr, op_bytes, ctxt->vcpu))
!= 0)
goto done;
register_address_increment(_regs[VCPU_REGS_RSP], op_bytes);
no_wb = 1; /* Disable writeback. */
break;
case 0x6c: /* insb */
case 0x6d: /* insw/insd */
if (kvm_emulate_pio_string(ctxt->vcpu, NULL,
@ -1217,12 +1230,15 @@ special_insn:
) == 0)
return -1;
return 0;
case 0x9c: /* pushf */
src.val = (unsigned long) _eflags;
goto push;
break;
case 0xc3: /* ret */
dst.ptr = &_eip;
goto pop_instruction;
case 0xf4: /* hlt */
ctxt->vcpu->halt_request = 1;
goto done;
}
if (rep_prefix) {
if (_regs[VCPU_REGS_RCX] == 0) {
@ -1271,24 +1287,7 @@ special_insn:
case 0xae ... 0xaf: /* scas */
DPRINTF("Urk! I don't handle SCAS.\n");
goto cannot_emulate;
case 0xf4: /* hlt */
ctxt->vcpu->halt_request = 1;
goto done;
case 0xc3: /* ret */
dst.ptr = &_eip;
goto pop_instruction;
case 0x58 ... 0x5f: /* pop reg */
dst.ptr = (unsigned long *)&_regs[b & 0x7];
pop_instruction:
if ((rc = ops->read_std(register_address(ctxt->ss_base,
_regs[VCPU_REGS_RSP]), dst.ptr, op_bytes, ctxt->vcpu))
!= 0)
goto done;
register_address_increment(_regs[VCPU_REGS_RSP], op_bytes);
no_wb = 1; /* Disable writeback. */
break;
}
goto writeback;
@ -1382,6 +1381,16 @@ twobyte_insn:
/* Odd cmov opcodes (lsb == 1) have inverted sense. */
no_wb ^= b & 1;
break;
case 0xa3:
bt: /* bt */
src.val &= (dst.bytes << 3) - 1; /* only subword offset */
emulate_2op_SrcV_nobyte("bt", src, dst, _eflags);
break;
case 0xab:
bts: /* bts */
src.val &= (dst.bytes << 3) - 1; /* only subword offset */
emulate_2op_SrcV_nobyte("bts", src, dst, _eflags);
break;
case 0xb0 ... 0xb1: /* cmpxchg */
/*
* Save real source value, then compare EAX against
@ -1399,30 +1408,15 @@ twobyte_insn:
dst.ptr = (unsigned long *)&_regs[VCPU_REGS_RAX];
}
break;
case 0xa3:
bt: /* bt */
src.val &= (dst.bytes << 3) - 1; /* only subword offset */
emulate_2op_SrcV_nobyte("bt", src, dst, _eflags);
break;
case 0xb3:
btr: /* btr */
src.val &= (dst.bytes << 3) - 1; /* only subword offset */
emulate_2op_SrcV_nobyte("btr", src, dst, _eflags);
break;
case 0xab:
bts: /* bts */
src.val &= (dst.bytes << 3) - 1; /* only subword offset */
emulate_2op_SrcV_nobyte("bts", src, dst, _eflags);
break;
case 0xb6 ... 0xb7: /* movzx */
dst.bytes = op_bytes;
dst.val = (d & ByteOp) ? (u8) src.val : (u16) src.val;
break;
case 0xbb:
btc: /* btc */
src.val &= (dst.bytes << 3) - 1; /* only subword offset */
emulate_2op_SrcV_nobyte("btc", src, dst, _eflags);
break;
case 0xba: /* Grp8 */
switch (modrm_reg & 3) {
case 0:
@ -1435,6 +1429,11 @@ twobyte_insn:
goto btc;
}
break;
case 0xbb:
btc: /* btc */
src.val &= (dst.bytes << 3) - 1; /* only subword offset */
emulate_2op_SrcV_nobyte("btc", src, dst, _eflags);
break;
case 0xbe ... 0xbf: /* movsx */
dst.bytes = op_bytes;
dst.val = (d & ByteOp) ? (s8) src.val : (s16) src.val;
@ -1446,14 +1445,14 @@ twobyte_special_insn:
/* Disable writeback. */
no_wb = 1;
switch (b) {
case 0x06:
emulate_clts(ctxt->vcpu);
break;
case 0x09: /* wbinvd */
break;
case 0x0d: /* GrpP (prefetch) */
case 0x18: /* Grp16 (prefetch/nop) */
break;
case 0x06:
emulate_clts(ctxt->vcpu);
break;
case 0x20: /* mov cr, reg */
if (modrm_mod != 3)
goto cannot_emulate;