#ifndef MACHOWRITER_H
#define MACHOWRITER_H
-#include "MachO.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetMachOWriterInfo.h"
-#include <map>
namespace llvm {
class GlobalVariable;
class Mangler;
- class MachineCodeEmitter;
- class MachOCodeEmitter;
- class OutputBuffer;
- class raw_ostream;
-
-
+ class MCCodeEmitter;
+ class MCContext;
+ class MCStreamer;
+
/// MachOWriter - This class implements the common target-independent code for
/// writing Mach-O files. Targets should derive a class from this to
/// parameterize the output format.
///
class MachOWriter : public MachineFunctionPass {
- friend class MachOCodeEmitter;
- public:
static char ID;
- MachineCodeEmitter &getMachineCodeEmitter() const {
- return *(MachineCodeEmitter*)MCE;
- }
-
- MachOWriter(raw_ostream &O, TargetMachine &TM);
- virtual ~MachOWriter();
-
- virtual const char *getPassName() const {
- return "Mach-O Writer";
- }
protected:
/// Output stream to send the resultant object file to.
///
- raw_ostream &O;
+ formatted_raw_ostream &O;
/// Target machine description.
///
TargetMachine &TM;
- /// Mang - The object used to perform name mangling for this module.
+ /// Target Asm Printer information.
///
- Mangler *Mang;
+ const MCAsmInfo *MAI;
- /// MCE - The MachineCodeEmitter object that we are exposing to emit machine
+ /// MCCE - The MCCodeEmitter object that we are exposing to emit machine
/// code for functions to the .o file.
-
- MachOCodeEmitter *MCE;
-
- /// is64Bit/isLittleEndian - This information is inferred from the target
- /// machine directly, indicating what header values and flags to set.
-
- bool is64Bit, isLittleEndian;
-
- // Target Asm Info
-
- const TargetAsmInfo *TAI;
-
- /// Header - An instance of MachOHeader that we will update while we build
- /// the file, and then emit during finalization.
+ MCCodeEmitter *MCCE;
+
+ /// OutContext - This is the context for the output file that we are
+ /// streaming. This owns all of the global MC-related objects for the
+ /// generated translation unit.
+ MCContext &OutContext;
+
+ /// OutStreamer - This is the MCStreamer object for the file we are
+ /// generating. This contains the transient state for the current
+ /// translation unit that we are generating (such as the current section
+ /// etc).
+ MCStreamer &OutStreamer;
+
+ /// Name-mangler for global names.
+ ///
+ Mangler *Mang;
- MachOHeader Header;
-
/// doInitialization - Emit the file header and all of the global variables
/// for the module to the Mach-O file.
-
bool doInitialization(Module &M);
- bool runOnMachineFunction(MachineFunction &MF);
-
/// doFinalization - Now that the module has been completely processed, emit
/// the Mach-O file to 'O'.
-
bool doFinalization(Module &M);
- private:
-
- /// SectionList - This is the list of sections that we have emitted to the
- /// file. Once the file has been completely built, the segment load command
- /// SectionCommands are constructed from this info.
-
- std::vector<MachOSection*> SectionList;
-
- /// SectionLookup - This is a mapping from section name to SectionList entry
-
- std::map<std::string, MachOSection*> SectionLookup;
-
- /// GVSection - This is a mapping from a GlobalValue to a MachOSection,
- /// to aid in emitting relocations.
-
- std::map<GlobalValue*, MachOSection*> GVSection;
-
- /// GVOffset - This is a mapping from a GlobalValue to an offset from the
- /// start of the section in which the GV resides, to aid in emitting
- /// relocations.
-
- std::map<GlobalValue*, intptr_t> GVOffset;
-
- /// getSection - Return the section with the specified name, creating a new
- /// section if one does not already exist.
-
- MachOSection *getSection(const std::string &seg, const std::string §,
- unsigned Flags = 0) {
- MachOSection *MOS = SectionLookup[seg+sect];
- if (MOS) return MOS;
-
- MOS = new MachOSection(seg, sect);
- SectionList.push_back(MOS);
- MOS->Index = SectionList.size();
- MOS->flags = MachOSection::S_REGULAR | Flags;
- SectionLookup[seg+sect] = MOS;
- return MOS;
- }
- MachOSection *getTextSection(bool isCode = true) {
- if (isCode)
- return getSection("__TEXT", "__text",
- MachOSection::S_ATTR_PURE_INSTRUCTIONS |
- MachOSection::S_ATTR_SOME_INSTRUCTIONS);
- else
- return getSection("__TEXT", "__text");
- }
- MachOSection *getBSSSection() {
- return getSection("__DATA", "__bss", MachOSection::S_ZEROFILL);
- }
- MachOSection *getDataSection() {
- return getSection("__DATA", "__data");
- }
- MachOSection *getConstSection(Constant *C) {
- const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
- if (CVA && CVA->isCString())
- return getSection("__TEXT", "__cstring",
- MachOSection::S_CSTRING_LITERALS);
-
- const Type *Ty = C->getType();
- if (Ty->isPrimitiveType() || Ty->isInteger()) {
- unsigned Size = TM.getTargetData()->getTypeAllocSize(Ty);
- switch(Size) {
- default: break; // Fall through to __TEXT,__const
- case 4:
- return getSection("__TEXT", "__literal4",
- MachOSection::S_4BYTE_LITERALS);
- case 8:
- return getSection("__TEXT", "__literal8",
- MachOSection::S_8BYTE_LITERALS);
- case 16:
- return getSection("__TEXT", "__literal16",
- MachOSection::S_16BYTE_LITERALS);
- }
- }
- return getSection("__TEXT", "__const");
- }
- MachOSection *getJumpTableSection() {
- if (TM.getRelocationModel() == Reloc::PIC_)
- return getTextSection(false);
- else
- return getSection("__TEXT", "__const");
- }
-
- /// MachOSymTab - This struct contains information about the offsets and
- /// size of symbol table information.
- /// segment.
- struct MachOSymTab {
- uint32_t cmd; // LC_SYMTAB
- uint32_t cmdsize; // sizeof( MachOSymTab )
- uint32_t symoff; // symbol table offset
- uint32_t nsyms; // number of symbol table entries
- uint32_t stroff; // string table offset
- uint32_t strsize; // string table size in bytes
-
- // Constants for the cmd field
- // see <mach-o/loader.h>
- enum { LC_SYMTAB = 0x02 // link-edit stab symbol table info
- };
-
- MachOSymTab() : cmd(LC_SYMTAB), cmdsize(6 * sizeof(uint32_t)), symoff(0),
- nsyms(0), stroff(0), strsize(0) { }
- };
-
- /// SymTab - The "stab" style symbol table information
- MachOSymTab SymTab;
- /// DySymTab - symbol table info for the dynamic link editor
- MachODySymTab DySymTab;
-
- protected:
-
- /// SymbolTable - This is the list of symbols we have emitted to the file.
- /// This actually gets rearranged before emission to the file (to put the
- /// local symbols first in the list).
- std::vector<MachOSym> SymbolTable;
-
- /// SymT - A buffer to hold the symbol table before we write it out at the
- /// appropriate location in the file.
- DataBuffer SymT;
-
- /// StrT - A buffer to hold the string table before we write it out at the
- /// appropriate location in the file.
- DataBuffer StrT;
+ bool runOnMachineFunction(MachineFunction &MF);
- /// PendingSyms - This is a list of externally defined symbols that we have
- /// been asked to emit, but have not seen a reference to. When a reference
- /// is seen, the symbol will move from this list to the SymbolTable.
- std::vector<GlobalValue*> PendingGlobals;
+ public:
+ explicit MachOWriter(formatted_raw_ostream &O, TargetMachine &TM,
+ const MCAsmInfo *T, MCCodeEmitter *MCE);
- /// DynamicSymbolTable - This is just a vector of indices into
- /// SymbolTable to aid in emitting the DYSYMTAB load command.
- std::vector<unsigned> DynamicSymbolTable;
+ virtual ~MachOWriter();
- static void InitMem(const Constant *C, void *Addr, intptr_t Offset,
- const TargetData *TD,
- std::vector<MachineRelocation> &MRs);
-
- private:
- void AddSymbolToSection(MachOSection *MOS, GlobalVariable *GV);
- void EmitGlobal(GlobalVariable *GV);
- void EmitHeaderAndLoadCommands();
- void EmitSections();
- void EmitRelocations();
- void BufferSymbolAndStringTable();
- void CalculateRelocations(MachOSection &MOS);
-
- MachineRelocation GetJTRelocation(unsigned Offset,
- MachineBasicBlock *MBB) const {
- return TM.getMachOWriterInfo()->GetJTRelocation(Offset, MBB);
- }
-
- /// GetTargetRelocation - Returns the number of relocations.
- unsigned GetTargetRelocation(MachineRelocation &MR,
- unsigned FromIdx,
- unsigned ToAddr,
- unsigned ToIndex,
- OutputBuffer &RelocOut,
- OutputBuffer &SecOut,
- bool Scattered,
- bool Extern) {
- return TM.getMachOWriterInfo()->GetTargetRelocation(MR, FromIdx, ToAddr,
- ToIndex, RelocOut,
- SecOut, Scattered,
- Extern);
+ virtual const char *getPassName() const {
+ return "Mach-O Writer";
}
};
}
projects / oota-llvm.git / blobdiff