本文整理汇总了C++中MCSymbolData::getIndex方法的典型用法代码示例。如果您正苦于以下问题：C++ MCSymbolData::getIndex方法的具体用法？C++ MCSymbolData::getIndex怎么用？C++ MCSymbolData::getIndex使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MCSymbolData的用法示例。
在下文中一共展示了MCSymbolData::getIndex方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: RecordTLVPRelocation
void X86MachObjectWriter::RecordX86Relocation(MachObjectWriter *Writer,
const MCAssembler &Asm,
const MCAsmLayout &Layout,
const MCFragment *Fragment,
const MCFixup &Fixup,
MCValue Target,
uint64_t &FixedValue) {
unsigned IsPCRel = Writer->isFixupKindPCRel(Asm, Fixup.getKind());
unsigned Log2Size = getFixupKindLog2Size(Fixup.getKind());
// If this is a 32-bit TLVP reloc it's handled a bit differently.
if (Target.getSymA() &&
Target.getSymA()->getKind() == MCSymbolRefExpr::VK_TLVP) {
RecordTLVPRelocation(Writer, Asm, Layout, Fragment, Fixup, Target,
FixedValue);
return;
}
// If this is a difference or a defined symbol plus an offset, then we need a
// scattered relocation entry. Differences always require scattered
// relocations.
if (Target.getSymB()) {
RecordScatteredRelocation(Writer, Asm, Layout, Fragment, Fixup,
Target, Log2Size, FixedValue);
return;
}
// Get the symbol data, if any.
MCSymbolData *SD = 0;
if (Target.getSymA())
SD = &Asm.getSymbolData(Target.getSymA()->getSymbol());
// If this is an internal relocation with an offset, it also needs a scattered
// relocation entry.
uint32_t Offset = Target.getConstant();
if (IsPCRel)
Offset += 1 << Log2Size;
// Try to record the scattered relocation if needed. Fall back to non
// scattered if necessary (see comments in RecordScatteredRelocation()
// for details).
if (Offset && SD && !Writer->doesSymbolRequireExternRelocation(SD) &&
RecordScatteredRelocation(Writer, Asm, Layout, Fragment, Fixup,
Target, Log2Size, FixedValue))
return;
// See <reloc.h>.
uint32_t FixupOffset = Layout.getFragmentOffset(Fragment)+Fixup.getOffset();
unsigned Index = 0;
unsigned IsExtern = 0;
unsigned Type = 0;
if (Target.isAbsolute()) { // constant
// SymbolNum of 0 indicates the absolute section.
//
// FIXME: Currently, these are never generated (see code below). I cannot
// find a case where they are actually emitted.
Type = macho::RIT_Vanilla;
} else {
// Resolve constant variables.
if (SD->getSymbol().isVariable()) {
int64_t Res;
if (SD->getSymbol().getVariableValue()->EvaluateAsAbsolute(
Res, Layout, Writer->getSectionAddressMap())) {
FixedValue = Res;
return;
}
}
// Check whether we need an external or internal relocation.
if (Writer->doesSymbolRequireExternRelocation(SD)) {
IsExtern = 1;
Index = SD->getIndex();
// For external relocations, make sure to offset the fixup value to
// compensate for the addend of the symbol address, if it was
// undefined. This occurs with weak definitions, for example.
if (!SD->Symbol->isUndefined())
FixedValue -= Layout.getSymbolOffset(SD);
} else {
// The index is the section ordinal (1-based).
const MCSectionData &SymSD = Asm.getSectionData(
SD->getSymbol().getSection());
Index = SymSD.getOrdinal() + 1;
FixedValue += Writer->getSectionAddress(&SymSD);
}
if (IsPCRel)
FixedValue -= Writer->getSectionAddress(Fragment->getParent());
Type = macho::RIT_Vanilla;
}
// struct relocation_info (8 bytes)
macho::RelocationEntry MRE;
MRE.Word0 = FixupOffset;
MRE.Word1 = ((Index << 0) |
(IsPCRel << 24) |
(Log2Size << 25) |
(IsExtern << 27) |
(Type << 28));
Writer->addRelocation(Fragment->getParent(), MRE);
}