diff options
Diffstat (limited to 'lib/Target/ARM/Disassembler/ARMDisassembler.cpp')
| -rw-r--r-- | lib/Target/ARM/Disassembler/ARMDisassembler.cpp | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp index 0b93f91..bb0fc9b 100644 --- a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp +++ b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp @@ -359,6 +359,8 @@ static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn, uint64_t Address, const void *Decoder); +static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn, + uint64_t Address, const void *Decoder); static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val, @@ -1733,6 +1735,29 @@ static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn, return S; } +static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn, + uint64_t Address, const void *Decoder) { + DecodeStatus S = MCDisassembler::Success; + + unsigned Rd = fieldFromInstruction(Insn, 12, 4); + unsigned Rm = fieldFromInstruction(Insn, 0, 4); + unsigned Rn = fieldFromInstruction(Insn, 16, 4); + unsigned pred = fieldFromInstruction(Insn, 28, 4); + + if (pred == 0xF) + return DecodeCPSInstruction(Inst, Insn, Address, Decoder); + + if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder))) + return MCDisassembler::Fail; + if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder))) + return MCDisassembler::Fail; + if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder))) + return MCDisassembler::Fail; + if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder))) + return MCDisassembler::Fail; + return S; +} + static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst, unsigned Insn, uint64_t Address, const void *Decoder) { @@ -1827,6 +1852,13 @@ static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn, DecodeStatus S = MCDisassembler::Success; + // This decoder is called from multiple location that do not check + // the full encoding is valid before they do. + if (fieldFromInstruction(Insn, 5, 1) != 0 || + fieldFromInstruction(Insn, 16, 1) != 0 || + fieldFromInstruction(Insn, 20, 8) != 0x10) + return MCDisassembler::Fail; + // imod == '01' --> UNPREDICTABLE // NOTE: Even though this is technically UNPREDICTABLE, we choose to // return failure here. The '01' imod value is unprintable, so there's |