#ifndef ELFCODEEMITTER_H
#define ELFCODEEMITTER_H
-#include "ELFWriter.h"
-#include "llvm/CodeGen/MachineCodeEmitter.h"
+#include "llvm/CodeGen/ObjectCodeEmitter.h"
#include <vector>
namespace llvm {
+ class ELFWriter;
+ class ELFSection;
/// ELFCodeEmitter - This class is used by the ELFWriter to
/// emit the code for functions to the ELF file.
- class ELFCodeEmitter : public MachineCodeEmitter {
+ class ELFCodeEmitter : public ObjectCodeEmitter {
ELFWriter &EW;
+
+ /// Target machine description
TargetMachine &TM;
- ELFWriter::ELFSection *ES; // Section to write to.
- uint8_t *FnStartPtr;
- public:
- explicit ELFCodeEmitter(ELFWriter &ew) : EW(ew), TM(EW.TM) {}
- void startFunction(MachineFunction &F);
- bool finishFunction(MachineFunction &F);
+ /// Section containing code for functions
+ ELFSection *ES;
+ /// Relocations - Record relocations needed by the current function
+ std::vector<MachineRelocation> Relocations;
+
+ /// FnStartPtr - Function offset from the beginning of ELFSection 'ES'
+ uintptr_t FnStartOff;
+
+ /// JumpTableSectionIdx - Holds the index of the Jump Table Section
+ unsigned JumpTableSectionIdx;
+ public:
+ explicit ELFCodeEmitter(ELFWriter &ew) : EW(ew), TM(EW.TM),
+ JumpTableSectionIdx(0) {}
+
+ /// addRelocation - Register new relocations for this function
void addRelocation(const MachineRelocation &MR) {
- assert(0 && "relo not handled yet!");
+ Relocations.push_back(MR);
}
- virtual void StartMachineBasicBlock(MachineBasicBlock *MBB) {
- }
+ /// emitConstantPool - For each constant pool entry, figure out which
+ /// section the constant should live in and emit data to it
+ void emitConstantPool(MachineConstantPool *MCP);
- virtual uintptr_t getConstantPoolEntryAddress(unsigned Index) const {
- assert(0 && "CP not implementated yet!");
- return 0;
- }
- virtual uintptr_t getJumpTableEntryAddress(unsigned Index) const {
- assert(0 && "JT not implementated yet!");
- return 0;
- }
+ /// emitJumpTables - Emit all the jump tables for a given jump table
+ /// info and record them to the appropriate section.
+ void emitJumpTables(MachineJumpTableInfo *MJTI);
- virtual uintptr_t getMachineBasicBlockAddress(MachineBasicBlock *MBB) const {
- assert(0 && "JT not implementated yet!");
- return 0;
+ void startFunction(MachineFunction &F);
+ bool finishFunction(MachineFunction &F);
+
+ /// emitLabel - Emits a label
+ virtual void emitLabel(uint64_t LabelID) {
+ assert("emitLabel not implemented");
}
+ /// getLabelAddress - Return the address of the specified LabelID,
+ /// only usable after the LabelID has been emitted.
virtual uintptr_t getLabelAddress(uint64_t Label) const {
- assert(0 && "Label address not implementated yet!");
- abort();
+ assert("getLabelAddress not implemented");
return 0;
}
- virtual void emitLabel(uint64_t LabelID) {
- assert(0 && "emit Label not implementated yet!");
- abort();
- }
-
- virtual void setModuleInfo(llvm::MachineModuleInfo* MMI) { }
+ virtual void setModuleInfo(llvm::MachineModuleInfo* MMI) {}
- /// JIT SPECIFIC FUNCTIONS - DO NOT IMPLEMENT THESE HERE!
- void startGVStub(const GlobalValue* F, unsigned StubSize,
- unsigned Alignment = 1) {
- assert(0 && "JIT specific function called!");
- abort();
- }
- void startGVStub(const GlobalValue* F, void *Buffer, unsigned StubSize) {
- assert(0 && "JIT specific function called!");
- abort();
- }
- void *finishGVStub(const GlobalValue *F) {
- assert(0 && "JIT specific function called!");
- abort();
- return 0;
- }
}; // end class ELFCodeEmitter
} // end namespace llvm