94 lines
2.4 KiB
C++
94 lines
2.4 KiB
C++
//===-- ARMUnwindOpAsm.h - ARM Unwind Opcodes Assembler ---------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares the unwind opcode assmebler for ARM exception handling
|
|
// table.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_ARM_MCTARGETDESC_ARMUNWINDOPASM_H
|
|
#define LLVM_LIB_TARGET_ARM_MCTARGETDESC_ARMUNWINDOPASM_H
|
|
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/Support/ARMEHABI.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
|
|
namespace llvm {
|
|
|
|
class MCSymbol;
|
|
|
|
class UnwindOpcodeAssembler {
|
|
private:
|
|
llvm::SmallVector<uint8_t, 32> Ops;
|
|
llvm::SmallVector<unsigned, 8> OpBegins;
|
|
bool HasPersonality;
|
|
|
|
public:
|
|
UnwindOpcodeAssembler()
|
|
: HasPersonality(0) {
|
|
OpBegins.push_back(0);
|
|
}
|
|
|
|
/// Reset the unwind opcode assembler.
|
|
void Reset() {
|
|
Ops.clear();
|
|
OpBegins.clear();
|
|
OpBegins.push_back(0);
|
|
HasPersonality = 0;
|
|
}
|
|
|
|
/// Set the personality
|
|
void setPersonality(const MCSymbol *Per) {
|
|
HasPersonality = 1;
|
|
}
|
|
|
|
/// Emit unwind opcodes for .save directives
|
|
void EmitRegSave(uint32_t RegSave);
|
|
|
|
/// Emit unwind opcodes for .vsave directives
|
|
void EmitVFPRegSave(uint32_t VFPRegSave);
|
|
|
|
/// Emit unwind opcodes to copy address from source register to $sp.
|
|
void EmitSetSP(uint16_t Reg);
|
|
|
|
/// Emit unwind opcodes to add $sp with an offset.
|
|
void EmitSPOffset(int64_t Offset);
|
|
|
|
/// Emit unwind raw opcodes
|
|
void EmitRaw(const SmallVectorImpl<uint8_t> &Opcodes) {
|
|
Ops.insert(Ops.end(), Opcodes.begin(), Opcodes.end());
|
|
OpBegins.push_back(OpBegins.back() + Opcodes.size());
|
|
}
|
|
|
|
/// Finalize the unwind opcode sequence for EmitBytes()
|
|
void Finalize(unsigned &PersonalityIndex,
|
|
SmallVectorImpl<uint8_t> &Result);
|
|
|
|
private:
|
|
void EmitInt8(unsigned Opcode) {
|
|
Ops.push_back(Opcode & 0xff);
|
|
OpBegins.push_back(OpBegins.back() + 1);
|
|
}
|
|
|
|
void EmitInt16(unsigned Opcode) {
|
|
Ops.push_back((Opcode >> 8) & 0xff);
|
|
Ops.push_back(Opcode & 0xff);
|
|
OpBegins.push_back(OpBegins.back() + 2);
|
|
}
|
|
|
|
void EmitBytes(const uint8_t *Opcode, size_t Size) {
|
|
Ops.insert(Ops.end(), Opcode, Opcode + Size);
|
|
OpBegins.push_back(OpBegins.back() + Size);
|
|
}
|
|
};
|
|
|
|
} // namespace llvm
|
|
|
|
#endif
|