#ifndef ARM_UNWIND_OP_ASM_H
#define ARM_UNWIND_OP_ASM_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.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);
}
void Reset() {
Ops.clear();
OpBegins.clear();
OpBegins.push_back(0);
HasPersonality = 0;
}
void setPersonality(const MCSymbol *Per) {
HasPersonality = 1;
}
void EmitRegSave(uint32_t RegSave);
void EmitVFPRegSave(uint32_t VFPRegSave);
void EmitSetSP(uint16_t Reg);
void EmitSPOffset(int64_t Offset);
void EmitRaw(const SmallVectorImpl<uint8_t> &Opcodes) {
Ops.insert(Ops.end(), Opcodes.begin(), Opcodes.end());
OpBegins.push_back(OpBegins.back() + Opcodes.size());
}
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);
}
};
}
#endif // ARM_UNWIND_OP_ASM_H