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their appropriate sections before the code itself. They need to be emitted before the function because on some targets (x86 but not x86_64) the later may reference a JT or CP entry address llvm-svn: 76672
79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
//===-- lib/CodeGen/ELFCodeEmitter.h ----------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ELFCODEEMITTER_H
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#define ELFCODEEMITTER_H
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#include "llvm/CodeGen/ObjectCodeEmitter.h"
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#include <vector>
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namespace llvm {
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class ELFWriter;
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class ELFSection;
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/// ELFCodeEmitter - This class is used by the ELFWriter to
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/// emit the code for functions to the ELF file.
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class ELFCodeEmitter : public ObjectCodeEmitter {
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ELFWriter &EW;
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/// Target machine description
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TargetMachine &TM;
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/// Section containing code for functions
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ELFSection *ES;
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/// Relocations - Record relocations needed by the current function
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std::vector<MachineRelocation> Relocations;
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/// JTRelocations - Record relocations needed by the relocation
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/// section.
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std::vector<MachineRelocation> JTRelocations;
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/// FnStartPtr - Function offset from the beginning of ELFSection 'ES'
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uintptr_t FnStartOff;
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public:
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explicit ELFCodeEmitter(ELFWriter &ew) : EW(ew), TM(EW.TM) {}
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/// addRelocation - Register new relocations for this function
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void addRelocation(const MachineRelocation &MR) {
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Relocations.push_back(MR);
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}
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/// emitConstantPool - For each constant pool entry, figure out which
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/// section the constant should live in and emit data to it
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void emitConstantPool(MachineConstantPool *MCP);
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/// emitJumpTables - Emit all the jump tables for a given jump table
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/// info and record them to the appropriate section.
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void emitJumpTables(MachineJumpTableInfo *MJTI);
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void startFunction(MachineFunction &F);
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bool finishFunction(MachineFunction &F);
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/// emitLabel - Emits a label
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virtual void emitLabel(uint64_t LabelID) {
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assert("emitLabel not implemented");
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}
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/// getLabelAddress - Return the address of the specified LabelID,
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/// only usable after the LabelID has been emitted.
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virtual uintptr_t getLabelAddress(uint64_t Label) const {
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assert("getLabelAddress not implemented");
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return 0;
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}
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virtual void setModuleInfo(llvm::MachineModuleInfo* MMI) {}
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}; // end class ELFCodeEmitter
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} // end namespace llvm
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#endif
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