diff options
| author | Yeting Kuo <46629943+yetingk@users.noreply.github.com> | 2023-12-30 15:40:20 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-12-30 15:40:20 +0800 |
| commit | 3dc0638cfc19e140daff7bf1281648daca8212fa (patch) | |
| tree | 22fb1ca484f500994dcc448d5bd133fa6315bb19 /llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp | |
| parent | fe2e677aa7aebedd316b1a688db8410855a213c1 (diff) | |
| download | llvm-3dc0638cfc19e140daff7bf1281648daca8212fa.zip llvm-3dc0638cfc19e140daff7bf1281648daca8212fa.tar.gz llvm-3dc0638cfc19e140daff7bf1281648daca8212fa.tar.bz2 | |
[RISCV] Add MC layer support for Zicfiss. (#66043)
The patch adds the instructions in Zicfiss extension. Zicfiss extension
is to support shadow stack for control flow integrity. This patch is
based on version [0.3.1].
[0.3.1]: https://github.com/riscv/riscv-cfi/releases/tag/v0.3.1
Diffstat (limited to 'llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp')
| -rw-r--r-- | llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp b/llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp index a639634..ed80da1 100644 --- a/llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp +++ b/llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp @@ -74,6 +74,17 @@ static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, uint32_t RegNo, return MCDisassembler::Success; } +static DecodeStatus DecodeGPRX1X5RegisterClass(MCInst &Inst, uint32_t RegNo, + uint64_t Address, + const MCDisassembler *Decoder) { + MCRegister Reg = RISCV::X0 + RegNo; + if (Reg != RISCV::X1 && Reg != RISCV::X5) + return MCDisassembler::Fail; + + Inst.addOperand(MCOperand::createReg(Reg)); + return MCDisassembler::Success; +} + static DecodeStatus DecodeFPR16RegisterClass(MCInst &Inst, uint32_t RegNo, uint64_t Address, const MCDisassembler *Decoder) { @@ -359,6 +370,10 @@ static DecodeStatus decodeRegReg(MCInst &Inst, uint32_t Insn, uint64_t Address, static DecodeStatus decodeZcmpSpimm(MCInst &Inst, unsigned Imm, uint64_t Address, const void *Decoder); +static DecodeStatus decodeCSSPushPopchk(MCInst &Inst, uint32_t Insn, + uint64_t Address, + const MCDisassembler *Decoder); + #include "RISCVGenDisassemblerTables.inc" static DecodeStatus decodeRVCInstrRdRs1ImmZero(MCInst &Inst, uint32_t Insn, @@ -373,6 +388,16 @@ static DecodeStatus decodeRVCInstrRdRs1ImmZero(MCInst &Inst, uint32_t Insn, return MCDisassembler::Success; } +static DecodeStatus decodeCSSPushPopchk(MCInst &Inst, uint32_t Insn, + uint64_t Address, + const MCDisassembler *Decoder) { + uint32_t Rs1 = fieldFromInstruction(Insn, 7, 5); + DecodeStatus Result = DecodeGPRX1X5RegisterClass(Inst, Rs1, Address, Decoder); + (void)Result; + assert(Result == MCDisassembler::Success && "Invalid register"); + return MCDisassembler::Success; +} + static DecodeStatus decodeRVCInstrRdSImm(MCInst &Inst, uint32_t Insn, uint64_t Address, const MCDisassembler *Decoder) { @@ -596,6 +621,8 @@ DecodeStatus RISCVDisassembler::getInstruction(MCInst &MI, uint64_t &Size, TRY_TO_DECODE_AND_ADD_SP(!STI.hasFeature(RISCV::Feature64Bit), DecoderTableRISCV32Only_16, "RISCV32Only_16 table (16-bit Instruction)"); + TRY_TO_DECODE_FEATURE(RISCV::FeatureStdExtZicfiss, DecoderTableZicfiss16, + "RVZicfiss table (Shadow Stack)"); TRY_TO_DECODE_FEATURE(RISCV::FeatureStdExtZcmt, DecoderTableRVZcmt16, "Zcmt table (16-bit Table Jump Instructions)"); TRY_TO_DECODE_FEATURE( |