#ifndef LLVM_MC_MCELFOBJECTWRITER_H
#define LLVM_MC_MCELFOBJECTWRITER_H
-#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/ADT/Triple.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/ELF.h"
+#include <vector>
namespace llvm {
+class MCAssembler;
+class MCFixup;
+class MCFragment;
+class MCObjectWriter;
+class MCSymbol;
+class MCValue;
+
+/// @name Relocation Data
+/// @{
+
+struct ELFRelocationEntry {
+ // Make these big enough for both 32-bit and 64-bit
+ uint64_t r_offset;
+ int Index;
+ unsigned Type;
+ const MCSymbol *Symbol;
+ uint64_t r_addend;
+ const MCFixup *Fixup;
+
+ ELFRelocationEntry()
+ : r_offset(0), Index(0), Type(0), Symbol(0), r_addend(0), Fixup(0) {}
+
+ ELFRelocationEntry(uint64_t RelocOffset, int Idx, unsigned RelType,
+ const MCSymbol *Sym, uint64_t Addend, const MCFixup &Fixup)
+ : r_offset(RelocOffset), Index(Idx), Type(RelType), Symbol(Sym),
+ r_addend(Addend), Fixup(&Fixup) {}
+
+ // Support lexicographic sorting.
+ bool operator<(const ELFRelocationEntry &RE) const {
+ return RE.r_offset < r_offset;
+ }
+};
+
class MCELFObjectTargetWriter {
const uint8_t OSABI;
const uint16_t EMachine;
const unsigned HasRelocationAddend : 1;
const unsigned Is64Bit : 1;
+ const unsigned IsN64 : 1;
protected:
MCELFObjectTargetWriter(bool Is64Bit_, uint8_t OSABI_,
- uint16_t EMachine_, bool HasRelocationAddend_);
+ uint16_t EMachine_, bool HasRelocationAddend,
+ bool IsN64=false);
public:
static uint8_t getOSABI(Triple::OSType OSType) {
virtual void adjustFixupOffset(const MCFixup &Fixup,
uint64_t &RelocOffset);
+ virtual void sortRelocs(const MCAssembler &Asm,
+ std::vector<ELFRelocationEntry> &Relocs);
/// @name Accessors
/// @{
uint16_t getEMachine() { return EMachine; }
bool hasRelocationAddend() { return HasRelocationAddend; }
bool is64Bit() const { return Is64Bit; }
+ bool isN64() const { return IsN64; }
/// @}
+
+ // Instead of changing everyone's API we pack the N64 Type fields
+ // into the existing 32 bit data unsigned.
+#define R_TYPE_SHIFT 0
+#define R_TYPE_MASK 0xffffff00
+#define R_TYPE2_SHIFT 8
+#define R_TYPE2_MASK 0xffff00ff
+#define R_TYPE3_SHIFT 16
+#define R_TYPE3_MASK 0xff00ffff
+#define R_SSYM_SHIFT 24
+#define R_SSYM_MASK 0x00ffffff
+
+ // N64 relocation type accessors
+ unsigned getRType(uint32_t Type) const {
+ return (unsigned)((Type >> R_TYPE_SHIFT) & 0xff);
+ }
+ unsigned getRType2(uint32_t Type) const {
+ return (unsigned)((Type >> R_TYPE2_SHIFT) & 0xff);
+ }
+ unsigned getRType3(uint32_t Type) const {
+ return (unsigned)((Type >> R_TYPE3_SHIFT) & 0xff);
+ }
+ unsigned getRSsym(uint32_t Type) const {
+ return (unsigned)((Type >> R_SSYM_SHIFT) & 0xff);
+ }
+
+ // N64 relocation type setting
+ unsigned setRType(unsigned Value, unsigned Type) const {
+ return ((Type & R_TYPE_MASK) | ((Value & 0xff) << R_TYPE_SHIFT));
+ }
+ unsigned setRType2(unsigned Value, unsigned Type) const {
+ return (Type & R_TYPE2_MASK) | ((Value & 0xff) << R_TYPE2_SHIFT);
+ }
+ unsigned setRType3(unsigned Value, unsigned Type) const {
+ return (Type & R_TYPE3_MASK) | ((Value & 0xff) << R_TYPE3_SHIFT);
+ }
+ unsigned setRSsym(unsigned Value, unsigned Type) const {
+ return (Type & R_SSYM_MASK) | ((Value & 0xff) << R_SSYM_SHIFT);
+ }
};
/// \brief Construct a new ELF writer instance.