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fix PR7465, mishandling of lcall and ljmp: intersegment long

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call and jumps.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111496 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-08-19 01:18:43 +00:00
parent 694a15eabe
commit 59f8a6a666
5 changed files with 33 additions and 12 deletions
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1
lib/Target/X86/X86InstrFormats.td
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@ -39,6 +39,7 @@ def MRM_E8 : Format<39>;
def MRM_F0 : Format<40>;
def MRM_F8 : Format<41>;
def MRM_F9 : Format<42>;
def RawFrmImm16 : Format<43>;
// ImmType - This specifies the immediate type used by an instruction. This is
// part of the ad-hoc solution used to emit machine instruction encodings by our

7
lib/Target/X86/X86InstrInfo.h
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@ -311,6 +311,12 @@ namespace X86II {
MRM_F0 = 40,
MRM_F8 = 41,
MRM_F9 = 42,
/// RawFrmImm16 - This is used for CALL FAR instructions, which have two
/// immediates, the first of which is a 16 or 32-bit immediate (specified by
/// the imm encoding) and the second is a 16-bit fixed value. In the AMD
/// manual, this operand is described as pntr16:32 and pntr16:16
RawFrmImm16 = 43,
FormMask = 63,
@ -522,6 +528,7 @@ namespace X86II {
case X86II::AddRegFrm:
case X86II::MRMDestReg:
case X86II::MRMSrcReg:
case X86II::RawFrmImm16:
return -1;
case X86II::MRMDestMem:
return 0;

24
lib/Target/X86/X86InstrInfo.td
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@ -675,12 +675,12 @@ let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in {
def JMP32m : I<0xFF, MRM4m, (outs), (ins i32mem:$dst), "jmp{l}\t{*}$dst",
[(brind (loadi32 addr:$dst))]>, Requires<[In32BitMode]>;
def FARJMP16i : Iseg16<0xEA, RawFrm, (outs),
(ins i16imm:$seg, i16imm:$off),
"ljmp{w}\t$seg, $off", []>, OpSize;
def FARJMP32i : Iseg32<0xEA, RawFrm, (outs),
(ins i16imm:$seg, i32imm:$off),
"ljmp{l}\t$seg, $off", []>;
def FARJMP16i : Iseg16<0xEA, RawFrmImm16, (outs),
(ins i16imm:$off, i16imm:$seg),
"ljmp{w}\t{$seg, $off|$off, $seg}", []>, OpSize;
def FARJMP32i : Iseg32<0xEA, RawFrmImm16, (outs),
(ins i32imm:$off, i16imm:$seg),
"ljmp{l}\t{$seg, $off|$off, $seg}", []>;
def FARJMP16m : I<0xFF, MRM5m, (outs), (ins opaque32mem:$dst),
"ljmp{w}\t{*}$dst", []>, OpSize;
@ -716,12 +716,12 @@ let isCall = 1 in
def CALL32m : I<0xFF, MRM2m, (outs), (ins i32mem:$dst, variable_ops),
"call\t{*}$dst", [(X86call (loadi32 addr:$dst))]>;
def FARCALL16i : Iseg16<0x9A, RawFrm, (outs),
(ins i16imm:$seg, i16imm:$off),
"lcall{w}\t$seg, $off", []>, OpSize;
def FARCALL32i : Iseg32<0x9A, RawFrm, (outs),
(ins i16imm:$seg, i32imm:$off),
"lcall{l}\t$seg, $off", []>;
def FARCALL16i : Iseg16<0x9A, RawFrmImm16, (outs),
(ins i16imm:$off, i16imm:$seg),
"lcall{w}\t{$seg, $off|$off, $seg}", []>, OpSize;
def FARCALL32i : Iseg32<0x9A, RawFrmImm16, (outs),
(ins i32imm:$off, i16imm:$seg),
"lcall{l}\t{$seg, $off|$off, $seg}", []>;
def FARCALL16m : I<0xFF, MRM3m, (outs), (ins opaque32mem:$dst),
"lcall{w}\t{*}$dst", []>, OpSize;

8
lib/Target/X86/X86MCCodeEmitter.cpp
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@ -827,6 +827,14 @@ EncodeInstruction(const MCInst &MI, raw_ostream &OS,
case X86II::RawFrm:
EmitByte(BaseOpcode, CurByte, OS);
break;
case X86II::RawFrmImm16:
EmitByte(BaseOpcode, CurByte, OS);
EmitImmediate(MI.getOperand(CurOp++),
X86II::getSizeOfImm(TSFlags), getImmFixupKind(TSFlags),
CurByte, OS, Fixups);
EmitImmediate(MI.getOperand(CurOp++), 2, FK_Data_2, CurByte, OS, Fixups);
break;
case X86II::AddRegFrm:
EmitByte(BaseOpcode + GetX86RegNum(MI.getOperand(CurOp++)), CurByte, OS);

5
test/MC/AsmParser/X86/x86_32-new-encoder.s
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@ -418,3 +418,8 @@ retl
// CHECK: jmpl *8(%eax)
// CHECK: encoding: [0xff,0x60,0x08]
jmp *8(%eax)
// PR7465
// CHECK: lcalll $2, $4660
// CHECK: encoding: [0x9a,0x34,0x12,0x00,0x00,0x02,0x00]
lcalll $0x2, $0x1234