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DW_FORM_sec_offset should be a relocation on platforms that use

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a relocation across sections. Do this for DW_AT_stmt list in the
skeleton CU and check the relocations in the debug_info section.

Add a FIXME for multiple CUs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178969 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2013-04-07 03:43:09 +00:00
parent 16f1969328
commit 9a9e73b47d
4 changed files with 35 additions and 7 deletions
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17
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -170,6 +170,7 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
DwarfStrSectionSym = TextSectionSym = 0;
DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = DwarfLineSectionSym = 0;
DwarfAddrSectionSym = 0;
DwarfAbbrevDWOSectionSym = DwarfStrDWOSectionSym = 0;
FunctionBeginSym = FunctionEndSym = 0;
@ -1740,9 +1741,12 @@ void DwarfDebug::emitSectionLabels() {
emitSectionSym(Asm, TLOF.getDwarfPubTypesSection());
DwarfStrSectionSym =
emitSectionSym(Asm, TLOF.getDwarfStrSection(), "info_string");
if (useSplitDwarf())
if (useSplitDwarf()) {
DwarfStrDWOSectionSym =
emitSectionSym(Asm, TLOF.getDwarfStrDWOSection(), "skel_string");
DwarfAddrSectionSym =
emitSectionSym(Asm, TLOF.getDwarfAddrSection(), "addr_sec");
}
DwarfDebugRangeSectionSym = emitSectionSym(Asm, TLOF.getDwarfRangesSection(),
"debug_range");
@ -2510,9 +2514,13 @@ CompileUnit *DwarfDebug::constructSkeletonCU(const MDNode *N) {
// This should be a unique identifier when we want to build .dwp files.
NewCU->addUInt(Die, dwarf::DW_AT_GNU_dwo_id, dwarf::DW_FORM_data8, 0);
// FIXME: The addr base should be relative for each compile unit, however,
// this one is going to be 0 anyhow.
NewCU->addUInt(Die, dwarf::DW_AT_GNU_addr_base, dwarf::DW_FORM_sec_offset, 0);
// Relocate to the beginning of the addr_base section, else 0 for the beginning
// of the one for this compile unit.
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
NewCU->addLabel(Die, dwarf::DW_AT_GNU_addr_base, dwarf::DW_FORM_sec_offset,
DwarfAddrSectionSym);
else
NewCU->addUInt(Die, dwarf::DW_AT_GNU_addr_base, dwarf::DW_FORM_sec_offset, 0);
// 2.17.1 requires that we use DW_AT_low_pc for a single entry point
// into an entity. We're using 0, or a NULL label for this.
@ -2520,6 +2528,7 @@ CompileUnit *DwarfDebug::constructSkeletonCU(const MDNode *N) {
// DW_AT_stmt_list is a offset of line number information for this
// compile unit in debug_line section.
// FIXME: Should handle multiple compile units.
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
NewCU->addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_sec_offset,
DwarfLineSectionSym);