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//===-- X86TargetObjInfo.h - Object File Info --------------------*- C++ -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Bill Wendling and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines target object file properties for X86
//
//===----------------------------------------------------------------------===//
#ifndef X86TARGETOBJINFO_H
#define X86TARGETOBJINFO_H
#include "llvm/Target/TargetObjInfo.h"
namespace llvm {
class TargetMachine;
struct ELFTargetObjInfo : public TargetObjInfo {
ELFTargetObjInfo(const TargetMachine &tm);
// align - Emit padding into the file until the current output position is
// aligned to the specified power of two boundary.
virtual void align(DataBuffer &Output, unsigned Boundary) const {
assert(Boundary && (Boundary & (Boundary - 1)) == 0 &&
"Must align to 2^k boundary");
size_t Size = Output.size();
if (Size & (Boundary - 1)) {
// Add padding to get alignment to the correct place.
size_t Pad = Boundary - (Size & (Boundary - 1));
Output.resize(Size + Pad);
}
}
//===------------------------------------------------------------------===//
// Out Functions - Output the specified value to the data buffer.
virtual void outbyte(DataBuffer &Output, unsigned char X) const {
Output.push_back(X);
}
virtual void outhalf(DataBuffer &Output, unsigned short X) const {
if (isLittleEndian) {
Output.push_back(X & 255);
Output.push_back(X >> 8);
} else {
Output.push_back(X >> 8);
Output.push_back(X & 255);
}
}
virtual void outword(DataBuffer &Output, unsigned X) const {
if (isLittleEndian) {
Output.push_back((X >> 0) & 255);
Output.push_back((X >> 8) & 255);
Output.push_back((X >> 16) & 255);
Output.push_back((X >> 24) & 255);
} else {
Output.push_back((X >> 24) & 255);
Output.push_back((X >> 16) & 255);
Output.push_back((X >> 8) & 255);
Output.push_back((X >> 0) & 255);
}
}
virtual void outxword(DataBuffer &Output, uint64_t X) const {
if (isLittleEndian) {
Output.push_back(unsigned(X >> 0) & 255);
Output.push_back(unsigned(X >> 8) & 255);
Output.push_back(unsigned(X >> 16) & 255);
Output.push_back(unsigned(X >> 24) & 255);
Output.push_back(unsigned(X >> 32) & 255);
Output.push_back(unsigned(X >> 40) & 255);
Output.push_back(unsigned(X >> 48) & 255);
Output.push_back(unsigned(X >> 56) & 255);
} else {
Output.push_back(unsigned(X >> 56) & 255);
Output.push_back(unsigned(X >> 48) & 255);
Output.push_back(unsigned(X >> 40) & 255);
Output.push_back(unsigned(X >> 32) & 255);
Output.push_back(unsigned(X >> 24) & 255);
Output.push_back(unsigned(X >> 16) & 255);
Output.push_back(unsigned(X >> 8) & 255);
Output.push_back(unsigned(X >> 0) & 255);
}
}
virtual void outaddr32(DataBuffer &Output, unsigned X) const {
outword(Output, X);
}
virtual void outaddr64(DataBuffer &Output, uint64_t X) const {
outxword(Output, X);
}
virtual void outaddr(DataBuffer &Output, uint64_t X) const {
if (!is64Bit)
outword(Output, (unsigned)X);
else
outxword(Output, X);
}
virtual void outstring(DataBuffer &Output, std::string &S,
unsigned Length) const {
// Not implemented
}
//===------------------------------------------------------------------===//
// Fix Functions - Replace an existing entry at an offset.
virtual void fixhalf(DataBuffer &Output, unsigned short X,
unsigned Offset) const {
unsigned char *P = &Output[Offset];
P[0] = (X >> (isLittleEndian ? 0 : 8)) & 255;
P[1] = (X >> (isLittleEndian ? 8 : 0)) & 255;
}
virtual void fixword(DataBuffer &Output, unsigned X,
unsigned Offset) const {
unsigned char *P = &Output[Offset];
P[0] = (X >> (isLittleEndian ? 0 : 24)) & 255;
P[1] = (X >> (isLittleEndian ? 8 : 16)) & 255;
P[2] = (X >> (isLittleEndian ? 16 : 8)) & 255;
P[3] = (X >> (isLittleEndian ? 24 : 0)) & 255;
}
virtual void fixaddr(DataBuffer &Output, uint64_t X,
unsigned Offset) const {
if (!is64Bit)
fixword(Output, (unsigned)X, Offset);
else
assert(0 && "Emission of 64-bit data not implemented yet!");
}
private:
/// Target machine description.
const TargetMachine &TM;
/// is64Bit/isLittleEndian - This information is inferred from the target
/// machine directly, indicating what header values and flags to set.
bool is64Bit, isLittleEndian;
};
} // end llvm namespace
#endif // X86TARGETOBJINFO_H
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