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Add the DW_AT_GNU_addr_base for the skeleton cu. Add support for

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emitting the dwarf32 version of DW_FORM_sec_offset and correct
disassembler support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172698 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2013-01-17 02:59:59 +00:00
parent 5ed625c3cf
commit d96c72a14c
4 changed files with 10 additions and 5 deletions
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2
lib/CodeGen/AsmPrinter/DIE.cpp
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@ -193,6 +193,7 @@ void DIEInteger::EmitValue(AsmPrinter *Asm, unsigned Form) const {
case dwarf::DW_FORM_data1: Size = 1; break;
case dwarf::DW_FORM_ref2: // Fall thru
case dwarf::DW_FORM_data2: Size = 2; break;
case dwarf::DW_FORM_sec_offset: // Fall thru
case dwarf::DW_FORM_ref4: // Fall thru
case dwarf::DW_FORM_data4: Size = 4; break;
case dwarf::DW_FORM_ref8: // Fall thru
@ -218,6 +219,7 @@ unsigned DIEInteger::SizeOf(AsmPrinter *AP, unsigned Form) const {
case dwarf::DW_FORM_data1: return sizeof(int8_t);
case dwarf::DW_FORM_ref2: // Fall thru
case dwarf::DW_FORM_data2: return sizeof(int16_t);
case dwarf::DW_FORM_sec_offset: // Fall thru
case dwarf::DW_FORM_ref4: // Fall thru
case dwarf::DW_FORM_data4: return sizeof(int32_t);
case dwarf::DW_FORM_ref8: // Fall thru

6
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -2443,7 +2443,11 @@ CompileUnit *DwarfDebug::constructSkeletonCU(const MDNode *N) {
// FIXME: This should be the .dwo file.
NewCU->addLocalString(Die, dwarf::DW_AT_GNU_dwo_name, FN);
// FIXME: We also need DW_AT_addr_base and DW_AT_dwo_id.
// FIXME: We also need DW_AT_dwo_id.
// 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);
// 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.

6
lib/DebugInfo/DWARFFormValue.cpp
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@ -173,10 +173,8 @@ DWARFFormValue::extractValue(DataExtractor data, uint32_t *offset_ptr,
indirect = true;
break;
case DW_FORM_sec_offset:
if (cu->getAddressByteSize() == 4)
Value.uval = data.getU32(offset_ptr);
else
Value.uval = data.getU64(offset_ptr);
// FIXME: This is 64-bit for DWARF64.
Value.uval = data.getU32(offset_ptr);
break;
case DW_FORM_flag_present:
Value.uval = 1;

1
test/DebugInfo/X86/fission-cu.ll
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@ -22,6 +22,7 @@
; CHECK: .debug_info contents:
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_GNU_dwo_name [DW_FORM_strp] ( .debug_str[0x00000000] = "baz.c")
; CHECK: DW_AT_GNU_addr_base [DW_FORM_sec_offset] (0x0000000000000000)
; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
; CHECK: DW_AT_stmt_list [DW_FORM_data4] (0x00000000)
; CHECK: DW_AT_comp_dir [DW_FORM_strp] ( .debug_str[0x00000006] = "/usr/local/google/home/echristo/tmp")