MCAsmStreamer(MCContext &Context, formatted_raw_ostream &os,
bool isVerboseAsm, bool useCFI, bool useDwarfDirectory,
MCInstPrinter *printer, MCCodeEmitter *emitter,
MCAsmBackend *asmbackend, bool showInst)
: MCStreamer(Context), OS(os), MAI(Context.getAsmInfo()),
InstPrinter(printer), Emitter(emitter), AsmBackend(asmbackend),
CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm),
ShowInst(showInst), UseCFI(useCFI),
UseDwarfDirectory(useDwarfDirectory) {
if (InstPrinter && IsVerboseAsm)
InstPrinter->setCommentStream(CommentStream);
}
static unsigned getRelocType64(MCContext &Ctx, SMLoc Loc,
MCSymbolRefExpr::VariantKind Modifier,
X86_64RelType Type, bool IsPCRel,
unsigned Kind) {
switch (Modifier) {
default:
llvm_unreachable("Unimplemented");
case MCSymbolRefExpr::VK_None:
switch (Type) {
case RT64_64:
return IsPCRel ? ELF::R_X86_64_PC64 : ELF::R_X86_64_64;
case RT64_32:
return IsPCRel ? ELF::R_X86_64_PC32 : ELF::R_X86_64_32;
case RT64_32S:
return ELF::R_X86_64_32S;
case RT64_16:
return IsPCRel ? ELF::R_X86_64_PC16 : ELF::R_X86_64_16;
case RT64_8:
return IsPCRel ? ELF::R_X86_64_PC8 : ELF::R_X86_64_8;
}
case MCSymbolRefExpr::VK_GOT:
switch (Type) {
case RT64_64:
return IsPCRel ? ELF::R_X86_64_GOTPC64 : ELF::R_X86_64_GOT64;
case RT64_32:
return IsPCRel ? ELF::R_X86_64_GOTPC32 : ELF::R_X86_64_GOT32;
case RT64_32S:
case RT64_16:
case RT64_8:
llvm_unreachable("Unimplemented");
}
case MCSymbolRefExpr::VK_GOTOFF:
assert(Type == RT64_64);
assert(!IsPCRel);
return ELF::R_X86_64_GOTOFF64;
case MCSymbolRefExpr::VK_TPOFF:
assert(!IsPCRel);
switch (Type) {
case RT64_64:
return ELF::R_X86_64_TPOFF64;
case RT64_32:
return ELF::R_X86_64_TPOFF32;
case RT64_32S:
case RT64_16:
case RT64_8:
llvm_unreachable("Unimplemented");
}
case MCSymbolRefExpr::VK_DTPOFF:
assert(!IsPCRel);
switch (Type) {
case RT64_64:
return ELF::R_X86_64_DTPOFF64;
case RT64_32:
return ELF::R_X86_64_DTPOFF32;
case RT64_32S:
case RT64_16:
case RT64_8:
llvm_unreachable("Unimplemented");
}
case MCSymbolRefExpr::VK_SIZE:
assert(!IsPCRel);
switch (Type) {
case RT64_64:
return ELF::R_X86_64_SIZE64;
case RT64_32:
return ELF::R_X86_64_SIZE32;
case RT64_32S:
case RT64_16:
case RT64_8:
llvm_unreachable("Unimplemented");
}
case MCSymbolRefExpr::VK_TLSCALL:
return ELF::R_X86_64_TLSDESC_CALL;
case MCSymbolRefExpr::VK_TLSDESC:
return ELF::R_X86_64_GOTPC32_TLSDESC;
case MCSymbolRefExpr::VK_TLSGD:
checkIs32(Ctx, Loc, Type);
return ELF::R_X86_64_TLSGD;
case MCSymbolRefExpr::VK_GOTTPOFF:
checkIs32(Ctx, Loc, Type);
return ELF::R_X86_64_GOTTPOFF;
case MCSymbolRefExpr::VK_TLSLD:
checkIs32(Ctx, Loc, Type);
return ELF::R_X86_64_TLSLD;
case MCSymbolRefExpr::VK_PLT:
checkIs32(Ctx, Loc, Type);
return ELF::R_X86_64_PLT32;
case MCSymbolRefExpr::VK_GOTPCREL:
checkIs32(Ctx, Loc, Type);
// Older versions of ld.bfd/ld.gold/lld
// do not support GOTPCRELX/REX_GOTPCRELX,
// and we want to keep back-compatibility.
if (!Ctx.getAsmInfo()->canRelaxRelocations())
return ELF::R_X86_64_GOTPCREL;
switch (Kind) {
default:
return ELF::R_X86_64_GOTPCREL;
case X86::reloc_riprel_4byte_relax:
return ELF::R_X86_64_GOTPCRELX;
case X86::reloc_riprel_4byte_relax_rex:
case X86::reloc_riprel_4byte_movq_load:
return ELF::R_X86_64_REX_GOTPCRELX;
}
}
}
