6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

Changed to use the OutputBuffer instead of the methods in MachO and ELF

Browse Source 
writers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33311 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2007-01-17 22:22:31 +00:00
parent f341ccbff9
commit 203d3e4386
5 changed files with 199 additions and 347 deletions
Download Patch File Download Diff File Expand all files Collapse all files

162
lib/CodeGen/MachOWriter.cpp
View File

@@ -34,6 +34,7 @@
#include "llvm/Target/TargetJITInfo.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/OutputBuffer.h"
#include "llvm/Support/Streams.h"
#include <algorithm>
@@ -49,6 +50,9 @@ namespace llvm {
class MachOCodeEmitter : public MachineCodeEmitter {
MachOWriter &MOW;
/// Target machine description.
TargetMachine &TM;
/// Relocations - These are the relocations that the function needs, as
/// emitted.
std::vector<MachineRelocation> Relocations;
@@ -71,7 +75,7 @@ namespace llvm {
std::vector<intptr_t> MBBLocations;
public:
MachOCodeEmitter(MachOWriter &mow) : MOW(mow) {}
MachOCodeEmitter(MachOWriter &mow) : MOW(mow), TM(MOW.TM) {}
virtual void startFunction(MachineFunction &F);
virtual bool finishFunction(MachineFunction &F);
@@ -163,7 +167,7 @@ bool MachOCodeEmitter::finishFunction(MachineFunction &F) {
// Get a symbol for the function to add to the symbol table
const GlobalValue *FuncV = F.getFunction();
MachOSym FnSym(FuncV, MOW.Mang->getValueName(FuncV), MOS->Index, MOW.TM);
MachOSym FnSym(FuncV, MOW.Mang->getValueName(FuncV), MOS->Index, TM);
// Emit constant pool to appropriate section(s)
emitConstantPool(F.getConstantPool());
@@ -211,7 +215,7 @@ void MachOCodeEmitter::emitConstantPool(MachineConstantPool *MCP) {
if (CP.empty()) return;
// FIXME: handle PIC codegen
bool isPIC = MOW.TM.getRelocationModel() == Reloc::PIC_;
bool isPIC = TM.getRelocationModel() == Reloc::PIC_;
assert(!isPIC && "PIC codegen not yet handled for mach-o jump tables!");
// Although there is no strict necessity that I am aware of, we will do what
@@ -223,9 +227,11 @@ void MachOCodeEmitter::emitConstantPool(MachineConstantPool *MCP) {
// "giant object for PIC" optimization.
for (unsigned i = 0, e = CP.size(); i != e; ++i) {
const Type *Ty = CP[i].getType();
unsigned Size = MOW.TM.getTargetData()->getTypeSize(Ty);
unsigned Size = TM.getTargetData()->getTypeSize(Ty);
MachOWriter::MachOSection *Sec = MOW.getConstSection(Ty);
OutputBuffer SecDataOut(TM, Sec->SectionData);
CPLocations.push_back(Sec->SectionData.size());
CPSections.push_back(Sec->Index);
@@ -236,10 +242,10 @@ void MachOCodeEmitter::emitConstantPool(MachineConstantPool *MCP) {
// FIXME: need alignment?
// FIXME: share between here and AddSymbolToSection?
for (unsigned j = 0; j < Size; ++j)
MOW.outbyte(Sec->SectionData, 0);
SecDataOut.outbyte(0);
MOW.InitMem(CP[i].Val.ConstVal, &Sec->SectionData[0], CPLocations[i],
MOW.TM.getTargetData(), Sec->Relocations);
TM.getTargetData(), Sec->Relocations);
}
}
@@ -250,11 +256,12 @@ void MachOCodeEmitter::emitJumpTables(MachineJumpTableInfo *MJTI) {
if (JT.empty()) return;
// FIXME: handle PIC codegen
bool isPIC = MOW.TM.getRelocationModel() == Reloc::PIC_;
bool isPIC = TM.getRelocationModel() == Reloc::PIC_;
assert(!isPIC && "PIC codegen not yet handled for mach-o jump tables!");
MachOWriter::MachOSection *Sec = MOW.getJumpTableSection();
unsigned TextSecIndex = MOW.getTextSection()->Index;
OutputBuffer SecDataOut(TM, Sec->SectionData);
for (unsigned i = 0, e = JT.size(); i != e; ++i) {
// For each jump table, record its offset from the start of the section,
@@ -267,7 +274,7 @@ void MachOCodeEmitter::emitJumpTables(MachineJumpTableInfo *MJTI) {
MR.setResultPointer((void *)JTLocations[i]);
MR.setConstantVal(TextSecIndex);
Sec->Relocations.push_back(MR);
MOW.outaddr(Sec->SectionData, 0);
SecDataOut.outaddr(0);
}
}
// FIXME: remove when we have unified size + output buffer
@@ -302,6 +309,8 @@ void MachOWriter::AddSymbolToSection(MachOSection *Sec, GlobalVariable *GV) {
// Reserve space in the .bss section for this symbol while maintaining the
// desired section alignment, which must be at least as much as required by
// this symbol.
OutputBuffer SecDataOut(TM, Sec->SectionData);
if (Align) {
uint64_t OrigSize = Sec->size;
Align = Log2_32(Align);
@@ -312,7 +321,7 @@ void MachOWriter::AddSymbolToSection(MachOSection *Sec, GlobalVariable *GV) {
// FIXME: remove when we have unified size + output buffer
unsigned AlignedSize = Sec->size - OrigSize;
for (unsigned i = 0; i < AlignedSize; ++i)
outbyte(Sec->SectionData, 0);
SecDataOut.outbyte(0);
}
// Record the offset of the symbol, and then allocate space for it.
// FIXME: remove when we have unified size + output buffer
@@ -329,7 +338,7 @@ void MachOWriter::AddSymbolToSection(MachOSection *Sec, GlobalVariable *GV) {
// Allocate space in the section for the global.
for (unsigned i = 0; i < Size; ++i)
outbyte(Sec->SectionData, 0);
SecDataOut.outbyte(0);
}
void MachOWriter::EmitGlobal(GlobalVariable *GV) {
@@ -442,15 +451,17 @@ void MachOWriter::EmitHeaderAndLoadCommands() {
// Step #3: write the header to the file
// Local alias to shortenify coming code.
DataBuffer &FH = Header.HeaderData;
outword(FH, Header.magic);
outword(FH, Header.cputype);
outword(FH, Header.cpusubtype);
outword(FH, Header.filetype);
outword(FH, Header.ncmds);
outword(FH, Header.sizeofcmds);
outword(FH, Header.flags);
OutputBuffer FHOut(TM, FH);
FHOut.outword(Header.magic);
FHOut.outword(Header.cputype);
FHOut.outword(Header.cpusubtype);
FHOut.outword(Header.filetype);
FHOut.outword(Header.ncmds);
FHOut.outword(Header.sizeofcmds);
FHOut.outword(Header.flags);
if (is64Bit)
outword(FH, Header.reserved);
FHOut.outword(Header.reserved);
// Step #4: Finish filling in the segment load command and write it out
for (std::vector<MachOSection*>::iterator I = SectionList.begin(),
@@ -460,17 +471,17 @@ void MachOWriter::EmitHeaderAndLoadCommands() {
SEG.vmsize = SEG.filesize;
SEG.fileoff = Header.cmdSize(is64Bit) + Header.sizeofcmds;
outword(FH, SEG.cmd);
outword(FH, SEG.cmdsize);
outstring(FH, SEG.segname, 16);
outaddr(FH, SEG.vmaddr);
outaddr(FH, SEG.vmsize);
outaddr(FH, SEG.fileoff);
outaddr(FH, SEG.filesize);
outword(FH, SEG.maxprot);
outword(FH, SEG.initprot);
outword(FH, SEG.nsects);
outword(FH, SEG.flags);
FHOut.outword(SEG.cmd);
FHOut.outword(SEG.cmdsize);
FHOut.outstring(SEG.segname, 16);
FHOut.outaddr(SEG.vmaddr);
FHOut.outaddr(SEG.vmsize);
FHOut.outaddr(SEG.fileoff);
FHOut.outaddr(SEG.filesize);
FHOut.outword(SEG.maxprot);
FHOut.outword(SEG.initprot);
FHOut.outword(SEG.nsects);
FHOut.outword(SEG.flags);
// Step #5: Finish filling in the fields of the MachOSections
uint64_t currentAddr = 0;
@@ -497,19 +508,19 @@ void MachOWriter::EmitHeaderAndLoadCommands() {
currentAddr += MOS->nreloc * 8;
// write the finalized section command to the output buffer
outstring(FH, MOS->sectname, 16);
outstring(FH, MOS->segname, 16);
outaddr(FH, MOS->addr);
outaddr(FH, MOS->size);
outword(FH, MOS->offset);
outword(FH, MOS->align);
outword(FH, MOS->reloff);
outword(FH, MOS->nreloc);
outword(FH, MOS->flags);
outword(FH, MOS->reserved1);
outword(FH, MOS->reserved2);
FHOut.outstring(MOS->sectname, 16);
FHOut.outstring(MOS->segname, 16);
FHOut.outaddr(MOS->addr);
FHOut.outaddr(MOS->size);
FHOut.outword(MOS->offset);
FHOut.outword(MOS->align);
FHOut.outword(MOS->reloff);
FHOut.outword(MOS->nreloc);
FHOut.outword(MOS->flags);
FHOut.outword(MOS->reserved1);
FHOut.outword(MOS->reserved2);
if (is64Bit)
outword(FH, MOS->reserved3);
FHOut.outword(MOS->reserved3);
}
// Step #7: Emit the symbol table to temporary buffers, so that we know the
@@ -521,36 +532,36 @@ void MachOWriter::EmitHeaderAndLoadCommands() {
SymTab.nsyms = SymbolTable.size();
SymTab.stroff = SymTab.symoff + SymT.size();
SymTab.strsize = StrT.size();
outword(FH, SymTab.cmd);
outword(FH, SymTab.cmdsize);
outword(FH, SymTab.symoff);
outword(FH, SymTab.nsyms);
outword(FH, SymTab.stroff);
outword(FH, SymTab.strsize);
FHOut.outword(SymTab.cmd);
FHOut.outword(SymTab.cmdsize);
FHOut.outword(SymTab.symoff);
FHOut.outword(SymTab.nsyms);
FHOut.outword(SymTab.stroff);
FHOut.outword(SymTab.strsize);
// FIXME: set DySymTab fields appropriately
// We should probably just update these in BufferSymbolAndStringTable since
// thats where we're partitioning up the different kinds of symbols.
outword(FH, DySymTab.cmd);
outword(FH, DySymTab.cmdsize);
outword(FH, DySymTab.ilocalsym);
outword(FH, DySymTab.nlocalsym);
outword(FH, DySymTab.iextdefsym);
outword(FH, DySymTab.nextdefsym);
outword(FH, DySymTab.iundefsym);
outword(FH, DySymTab.nundefsym);
outword(FH, DySymTab.tocoff);
outword(FH, DySymTab.ntoc);
outword(FH, DySymTab.modtaboff);
outword(FH, DySymTab.nmodtab);
outword(FH, DySymTab.extrefsymoff);
outword(FH, DySymTab.nextrefsyms);
outword(FH, DySymTab.indirectsymoff);
outword(FH, DySymTab.nindirectsyms);
outword(FH, DySymTab.extreloff);
outword(FH, DySymTab.nextrel);
outword(FH, DySymTab.locreloff);
outword(FH, DySymTab.nlocrel);
FHOut.outword(DySymTab.cmd);
FHOut.outword(DySymTab.cmdsize);
FHOut.outword(DySymTab.ilocalsym);
FHOut.outword(DySymTab.nlocalsym);
FHOut.outword(DySymTab.iextdefsym);
FHOut.outword(DySymTab.nextdefsym);
FHOut.outword(DySymTab.iundefsym);
FHOut.outword(DySymTab.nundefsym);
FHOut.outword(DySymTab.tocoff);
FHOut.outword(DySymTab.ntoc);
FHOut.outword(DySymTab.modtaboff);
FHOut.outword(DySymTab.nmodtab);
FHOut.outword(DySymTab.extrefsymoff);
FHOut.outword(DySymTab.nextrefsyms);
FHOut.outword(DySymTab.indirectsymoff);
FHOut.outword(DySymTab.nindirectsyms);
FHOut.outword(DySymTab.extreloff);
FHOut.outword(DySymTab.nextrel);
FHOut.outword(DySymTab.locreloff);
FHOut.outword(DySymTab.nlocrel);
O.write((char*)&FH[0], FH.size());
}
@@ -627,7 +638,8 @@ void MachOWriter::BufferSymbolAndStringTable() {
// Write out a leading zero byte when emitting string table, for n_strx == 0
// which means an empty string.
outbyte(StrT, 0);
OutputBuffer StrTOut(TM, StrT);
StrTOut.outbyte(0);
// The order of the string table is:
// 1. strings for external symbols
@@ -640,10 +652,12 @@ void MachOWriter::BufferSymbolAndStringTable() {
I->n_strx = 0;
} else {
I->n_strx = StrT.size();
outstring(StrT, I->GVName, I->GVName.length()+1);
StrTOut.outstring(I->GVName, I->GVName.length()+1);
}
}
OutputBuffer SymTOut(TM, SymT);
for (std::vector<MachOSym>::iterator I = SymbolTable.begin(),
E = SymbolTable.end(); I != E; ++I) {
// Add the section base address to the section offset in the n_value field
@@ -654,11 +668,11 @@ void MachOWriter::BufferSymbolAndStringTable() {
I->n_value += GVSection[GV]->addr;
// Emit nlist to buffer
outword(SymT, I->n_strx);
outbyte(SymT, I->n_type);
outbyte(SymT, I->n_sect);
outhalf(SymT, I->n_desc);
outaddr(SymT, I->n_value);
SymTOut.outword(I->n_strx);
SymTOut.outbyte(I->n_type);
SymTOut.outbyte(I->n_sect);
SymTOut.outhalf(I->n_desc);
SymTOut.outaddr(I->n_value);
}
}