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Emit relocations from .debug_aranges to .debug_info for asm files

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167926 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov
2012-11-14 09:55:38 +00:00
parent 1e65676a12
commit 15ab115df5
2 changed files with 61 additions and 11 deletions
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28
lib/MC/MCDwarf.cpp
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@@ -484,7 +484,8 @@ static void EmitGenDwarfAbbrev(MCStreamer *MCOS) {
// .debug_aranges section. Which contains a header and a table of pairs of
// PointerSize'ed values for the address and size of section(s) with line table
// entries (just the default .text in our case) and a terminating pair of zeros.
static void EmitGenDwarfAranges(MCStreamer *MCOS) {
static void EmitGenDwarfAranges(MCStreamer *MCOS,
const MCSymbol *InfoSectionSymbol) {
MCContext &context = MCOS->getContext();
// Create a symbol at the end of the section that we are creating the dwarf
@@ -523,8 +524,11 @@ static void EmitGenDwarfAranges(MCStreamer *MCOS) {
// The 2 byte version, which is 2.
MCOS->EmitIntValue(2, 2);
// The 4 byte offset to the compile unit in the .debug_info from the start
// of the .debug_info, it is at the start of that section so this is zero.
MCOS->EmitIntValue(0, 4);
// of the .debug_info.
if (InfoSectionSymbol)
MCOS->EmitSymbolValue(InfoSectionSymbol, 4);
else
MCOS->EmitIntValue(0, 4);
// The 1 byte size of an address.
MCOS->EmitIntValue(AddrSize, 1);
// The 1 byte size of a segment descriptor, we use a value of zero.
@@ -705,15 +709,21 @@ void MCGenDwarfInfo::Emit(MCStreamer *MCOS, const MCSymbol *LineSectionSymbol) {
// Create the dwarf sections in this order (.debug_line already created).
MCContext &context = MCOS->getContext();
const MCAsmInfo &AsmInfo = context.getAsmInfo();
bool CreateDwarfSectionSymbols =
AsmInfo.doesDwarfUseRelocationsAcrossSections();
if (!CreateDwarfSectionSymbols)
LineSectionSymbol = NULL;
MCSymbol *AbbrevSectionSymbol = NULL;
MCSymbol *InfoSectionSymbol = NULL;
MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection());
if (CreateDwarfSectionSymbols) {
InfoSectionSymbol = context.CreateTempSymbol();
MCOS->EmitLabel(InfoSectionSymbol);
}
MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection());
MCSymbol *AbbrevSectionSymbol;
if (AsmInfo.doesDwarfUseRelocationsAcrossSections()) {
if (CreateDwarfSectionSymbols) {
AbbrevSectionSymbol = context.CreateTempSymbol();
MCOS->EmitLabel(AbbrevSectionSymbol);
} else {
AbbrevSectionSymbol = NULL;
LineSectionSymbol = NULL;
}
MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection());
@@ -722,7 +732,7 @@ void MCGenDwarfInfo::Emit(MCStreamer *MCOS, const MCSymbol *LineSectionSymbol) {
return;
// Output the data for .debug_aranges section.
EmitGenDwarfAranges(MCOS);
EmitGenDwarfAranges(MCOS, InfoSectionSymbol);
// Output the data for .debug_abbrev section.
EmitGenDwarfAbbrev(MCOS);