Moved the GetTargetRelocation method to the PPCMachOWriterInfo object. The
PPCMachOWriter is now trivial. llvm-svn: 33818
This commit is contained in:
Bill Wendling
parent
c85e32c730
commit
2c350921e2
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@ -12,35 +12,17 @@
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//
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//===----------------------------------------------------------------------===//
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#include "PPCRelocations.h"
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#include "PPCTargetMachine.h"
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#include "llvm/PassManager.h"
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#include "llvm/CodeGen/MachOWriter.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/OutputBuffer.h"
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using namespace llvm;
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namespace {
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class VISIBILITY_HIDDEN PPCMachOWriter : public MachOWriter {
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public:
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struct VISIBILITY_HIDDEN PPCMachOWriter : public MachOWriter {
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PPCMachOWriter(std::ostream &O, PPCTargetMachine &TM)
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: MachOWriter(O, TM) {}
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virtual void GetTargetRelocation(MachineRelocation &MR, MachOSection &From,
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MachOSection &To, bool Scattered);
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// Constants for the relocation r_type field.
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// see <mach-o/ppc/reloc.h>
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enum { PPC_RELOC_VANILLA, // generic relocation
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PPC_RELOC_PAIR, // the second relocation entry of a pair
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PPC_RELOC_BR14, // 14 bit branch displacement to word address
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PPC_RELOC_BR24, // 24 bit branch displacement to word address
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PPC_RELOC_HI16, // a PAIR follows with the low 16 bits
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PPC_RELOC_LO16, // a PAIR follows with the high 16 bits
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PPC_RELOC_HA16, // a PAIR follows, which is sign extended to 32b
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PPC_RELOC_LO14 // LO16 with low 2 bits implicitly zero
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};
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};
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}
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/// addPPCMachOObjectWriterPass - Returns a pass that outputs the generated code
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@ -52,115 +34,3 @@ void llvm::addPPCMachOObjectWriterPass(FunctionPassManager &FPM,
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FPM.add(MOW);
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FPM.add(createPPCCodeEmitterPass(TM, MOW->getMachineCodeEmitter()));
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}
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/// GetTargetRelocation - For the MachineRelocation MR, convert it to one or
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/// more PowerPC MachORelocation(s), add the new relocations to the
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/// MachOSection, and rewrite the instruction at the section offset if required
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/// by that relocation type.
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void PPCMachOWriter::GetTargetRelocation(MachineRelocation &MR,
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MachOSection &From,
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MachOSection &To,
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bool Scattered) {
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uint64_t Addr = 0;
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// Keep track of whether or not this is an externally defined relocation.
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bool isExtern = false;
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// Get the address of whatever it is we're relocating, if possible.
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if (!isExtern)
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Addr = (uintptr_t)MR.getResultPointer() + To.addr;
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switch ((PPC::RelocationType)MR.getRelocationType()) {
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default: assert(0 && "Unknown PPC relocation type!");
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case PPC::reloc_absolute_low_ix:
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assert(0 && "Unhandled PPC relocation type!");
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break;
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case PPC::reloc_vanilla:
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{
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// FIXME: need to handle 64 bit vanilla relocs
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MachORelocation VANILLA(MR.getMachineCodeOffset(), To.Index, false, 2,
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isExtern, PPC_RELOC_VANILLA, Scattered,
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(intptr_t)MR.getResultPointer());
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++From.nreloc;
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OutputBuffer RelocOut(From.RelocBuffer, is64Bit, isLittleEndian);
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OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
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if (Scattered) {
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RelocOut.outword(VANILLA.getPackedFields());
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RelocOut.outword(VANILLA.getAddress());
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} else {
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RelocOut.outword(VANILLA.getAddress());
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RelocOut.outword(VANILLA.getPackedFields());
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}
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intptr_t SymbolOffset;
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if (Scattered)
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SymbolOffset = Addr + MR.getConstantVal();
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else
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SymbolOffset = Addr;
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printf("vanilla fixup: sec_%x[%x] = %x\n", From.Index, unsigned(MR.getMachineCodeOffset()), (unsigned)SymbolOffset);
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SecOut.fixword(SymbolOffset, MR.getMachineCodeOffset());
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}
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break;
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case PPC::reloc_pcrel_bx:
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{
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Addr -= MR.getMachineCodeOffset();
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Addr >>= 2;
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Addr &= 0xFFFFFF;
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Addr <<= 2;
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Addr |= (From.SectionData[MR.getMachineCodeOffset()] << 24);
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OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
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SecOut.fixword(Addr, MR.getMachineCodeOffset());
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break;
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}
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case PPC::reloc_pcrel_bcx:
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{
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Addr -= MR.getMachineCodeOffset();
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Addr &= 0xFFFC;
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OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
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SecOut.fixhalf(Addr, MR.getMachineCodeOffset() + 2);
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break;
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}
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case PPC::reloc_absolute_high:
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{
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MachORelocation HA16(MR.getMachineCodeOffset(), To.Index, false, 2,
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isExtern, PPC_RELOC_HA16);
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MachORelocation PAIR(Addr & 0xFFFF, 0xFFFFFF, false, 2, isExtern,
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PPC_RELOC_PAIR);
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++From.nreloc;
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++From.nreloc;
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OutputBuffer RelocOut(From.RelocBuffer, is64Bit, isLittleEndian);
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RelocOut.outword(HA16.r_address);
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RelocOut.outword(HA16.getPackedFields());
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RelocOut.outword(PAIR.r_address);
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RelocOut.outword(PAIR.getPackedFields());
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Addr += 0x8000;
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OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
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SecOut.fixhalf(Addr >> 16, MR.getMachineCodeOffset() + 2);
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break;
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}
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case PPC::reloc_absolute_low:
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{
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MachORelocation LO16(MR.getMachineCodeOffset(), To.Index, false, 2,
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isExtern, PPC_RELOC_LO16);
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MachORelocation PAIR(Addr >> 16, 0xFFFFFF, false, 2, isExtern,
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PPC_RELOC_PAIR);
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++From.nreloc;
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++From.nreloc;
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OutputBuffer RelocOut(From.RelocBuffer, is64Bit, isLittleEndian);
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RelocOut.outword(LO16.r_address);
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RelocOut.outword(LO16.getPackedFields());
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RelocOut.outword(PAIR.r_address);
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RelocOut.outword(PAIR.getPackedFields());
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OutputBuffer SecOut(From.SectionData, is64Bit, isLittleEndian);
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SecOut.fixhalf(Addr, MR.getMachineCodeOffset() + 2);
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break;
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}
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}
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}
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