1 //===-- PPCMachObjectWriter.cpp - PPC Mach-O Writer -----------------------===//
8 //===----------------------------------------------------------------------===//
31                                  const MCFixup &Fixup, MCValue Target,
36                            const MCFragment *Fragment, const MCFixup &Fixup,
45                         const MCFixup &Fixup, MCValue Target,  in recordRelocation()  argument
47     if (Writer->is64Bit()) {  in recordRelocation()
50       RecordPPCRelocation(Writer, Asm, Layout, Fragment, Fixup, Target,  in recordRelocation()
61     report_fatal_error("log2size(FixupKind): Unhandled fixup kind!");  in getFixupKindLog2Size()
81 /// Translates generic PPC fixup kind to Mach-O/PPC relocation type enum.
85                                                           // Fixup.getKind()  in getRelocType()
89                           : Target.getSymA()->getKind();  in getRelocType()
95       report_fatal_error("Unimplemented fixup kind (relative)");  in getRelocType()
105         llvm_unreachable("Unsupported modifier for half16 fixup");  in getRelocType()
121       report_fatal_error("Unimplemented fixup kind (absolute)!");  in getRelocType()
125         llvm_unreachable("Unsupported modifier for half16 fixup");  in getRelocType()
151   // The bitfield offsets that work (as determined by trial-and-error)  in makeRelocationInfo()
152   // are different than what is documented in the mach-o manuals.  in makeRelocationInfo()
169 …onceptual/MachORuntime/Reference/reference.html#//apple_ref/doc/uid/20001298-scattered_relocation_…  in makeScatteredRelocationInfo()
175 /// Compute fixup offset (address).
178                                const MCFixup &Fixup) {  in getFixupOffset()  argument
179   uint32_t FixupOffset = Layout.getFragmentOffset(Fragment) + Fixup.getOffset();  in getFixupOffset()
180   // On Mach-O, ppc_fixup_half16 relocations must refer to the  in getFixupOffset()
182   if (unsigned(Fixup.getKind()) == PPC::fixup_ppc_half16)  in getFixupOffset()
187 /// \return false if falling back to using non-scattered relocation,
193     const MCFragment *Fragment, const MCFixup &Fixup, MCValue Target,  in recordScatteredRelocation()  argument
196   const uint32_t FixupOffset = getFixupOffset(Layout, Fragment, Fixup);  in recordScatteredRelocation()
197   const MCFixupKind FK = Fixup.getKind();  in recordScatteredRelocation()
198   const unsigned IsPCRel = Writer->isFixupKindPCRel(Asm, FK);  in recordScatteredRelocation()
203   // and require two entries, the first for the add-symbol value,  in recordScatteredRelocation()
204   // the second for the subtract-symbol value.  in recordScatteredRelocation()
207   const MCSymbol *A = &Target.getSymA()->getSymbol();  in recordScatteredRelocation()
209   if (!A->getFragment())  in recordScatteredRelocation()
210     report_fatal_error("symbol '" + A->getName() +  in recordScatteredRelocation()
213   uint32_t Value = Writer->getSymbolAddress(*A, Layout);  in recordScatteredRelocation()
214   uint64_t SecAddr = Writer->getSectionAddress(A->getFragment()->getParent());  in recordScatteredRelocation()
219     const MCSymbol *SB = &B->getSymbol();  in recordScatteredRelocation()
221     if (!SB->getFragment())  in recordScatteredRelocation()
222       report_fatal_error("symbol '" + B->getSymbol().getName() +  in recordScatteredRelocation()
226     Value2 = Writer->getSymbolAddress(B->getSymbol(), Layout);  in recordScatteredRelocation()
227     FixedValue -= Writer->getSectionAddress(SB->getFragment()->getParent());  in recordScatteredRelocation()
244       Asm.getContext().reportError(Fixup.getLoc(),  in recordScatteredRelocation()
260       // It looks like this is not true for the FixedValue needed with Mach-O  in recordScatteredRelocation()
282     Writer->addRelocation(nullptr, Fragment->getParent(), MRE);  in recordScatteredRelocation()
284     // If the offset is more than 24-bits, it won't fit in a scattered  in recordScatteredRelocation()
285     // relocation offset field, so we fall back to using a non-scattered  in recordScatteredRelocation()
287     // the block and the linker is doing scattered loading on this  in recordScatteredRelocation()
296   Writer->addRelocation(nullptr, Fragment->getParent(), MRE);  in recordScatteredRelocation()
303     const MCFragment *Fragment, const MCFixup &Fixup, MCValue Target,  in RecordPPCRelocation()  argument
305   const MCFixupKind FK = Fixup.getKind(); // unsigned  in RecordPPCRelocation()
307   const bool IsPCRel = Writer->isFixupKindPCRel(Asm, FK);  in RecordPPCRelocation()
317     recordScatteredRelocation(Writer, Asm, Layout, Fragment, Fixup, Target,  in RecordPPCRelocation()
326     A = &Target.getSymA()->getSymbol();  in RecordPPCRelocation()
329   const uint32_t FixupOffset = getFixupOffset(Layout, Fragment, Fixup);  in RecordPPCRelocation()
344     if (A->isVariable()) {  in RecordPPCRelocation()
346       if (A->getVariableValue()->evaluateAsAbsolute(  in RecordPPCRelocation()
347               Res, Layout, Writer->getSectionAddressMap())) {  in RecordPPCRelocation()
354     if (Writer->doesSymbolRequireExternRelocation(*A)) {  in RecordPPCRelocation()
356       // For external relocations, make sure to offset the fixup value to  in RecordPPCRelocation()
359       if (!A->isUndefined())  in RecordPPCRelocation()
360         FixedValue -= Layout.getSymbolOffset(*A);  in RecordPPCRelocation()
362       // The index is the section ordinal (1-based).  in RecordPPCRelocation()
363       const MCSection &Sec = A->getSection();  in RecordPPCRelocation()
365       FixedValue += Writer->getSectionAddress(&Sec);  in RecordPPCRelocation()
368       FixedValue -= Writer->getSectionAddress(Fragment->getParent());  in RecordPPCRelocation()
374   Writer->addRelocation(RelSymbol, Fragment->getParent(), MRE);  in RecordPPCRelocation()