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Add debug support for X86/ELF targets (Linux). This allows llvm-gcc4

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generated object modules to be debugged with gdb. Hopefully this helps
pre-release debugging.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31299 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2006-10-30 22:32:30 +00:00
parent 6ce644392e
commit 02b8511364
9 changed files with 59 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
lib/Target/TargetAsmInfo.cpp
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@@ -64,6 +64,7 @@ TargetAsmInfo::TargetAsmInfo() :
HasLEB128(false),
HasDotLoc(false),
HasDotFile(false),
DwarfRequiresFrameSection(true),
DwarfAbbrevSection(".debug_abbrev"),
DwarfInfoSection(".debug_info"),
DwarfLineSection(".debug_line"),

6
lib/Target/X86/X86ATTAsmPrinter.cpp
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@@ -52,7 +52,7 @@ std::string X86ATTAsmPrinter::getSectionForFunction(const Function &F) const {
/// method to print assembly for each instruction.
///
bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
if (Subtarget->isTargetDarwin()) {
if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF()) {
// Let PassManager know we need debug information and relay
// the MachineDebugInfo address on to DwarfWriter.
DW.SetDebugInfo(&getAnalysis<MachineDebugInfo>());
@@ -111,7 +111,7 @@ bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
F->getLinkage() == Function::WeakLinkage))
O << "_llvm$workaround$fake$stub_" << CurrentFnName << ":\n";
if (Subtarget->isTargetDarwin()) {
if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF()) {
// Emit pre-function debug information.
DW.BeginFunction(&MF);
}
@@ -141,7 +141,7 @@ bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
if (TAI->hasDotTypeDotSizeDirective())
O << "\t.size " << CurrentFnName << ", .-" << CurrentFnName << "\n";
if (Subtarget->isTargetDarwin()) {
if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF()) {
// Emit post-function debug information.
DW.EndFunction();
}

8
lib/Target/X86/X86AsmPrinter.cpp
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@@ -114,6 +114,9 @@ bool X86SharedAsmPrinter::doInitialization(Module &M) {
if (!Subtarget->is64Bit())
X86PICStyle = PICStyle::Stub;
// Emit initial debug information.
DW.BeginModule(&M);
} else if (Subtarget->isTargetELF()) {
// Emit initial debug information.
DW.BeginModule(&M);
}
@@ -278,7 +281,7 @@ bool X86SharedAsmPrinter::doFinalization(Module &M) {
O << "\t.long\t0\n";
}
// Emit initial debug information.
// Emit final debug information.
DW.EndModule();
// Funny Darwin hack: This flag tells the linker that no global symbols
@@ -287,6 +290,9 @@ bool X86SharedAsmPrinter::doFinalization(Module &M) {
// linker can safely perform dead code stripping. Since LLVM never
// generates code that does this, it is always safe to set.
O << "\t.subsections_via_symbols\n";
} else if (Subtarget->isTargetELF()) {
// Emit final debug information.
DW.EndModule();
}
AsmPrinter::doFinalization(M);

2
lib/Target/X86/X86AsmPrinter.h
View File

@@ -67,7 +67,7 @@ struct VISIBILITY_HIDDEN X86SharedAsmPrinter : public AsmPrinter {
void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
if (Subtarget->isTargetDarwin()) {
if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF()) {
AU.addRequired<MachineDebugInfo>();
}
MachineFunctionPass::getAnalysisUsage(AU);

2
lib/Target/X86/X86ISelLowering.cpp
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@@ -219,7 +219,7 @@ X86TargetLowering::X86TargetLowering(TargetMachine &TM)
setOperationAction(ISD::LOCATION, MVT::Other, Expand);
setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
// FIXME - use subtarget debug flags
if (!Subtarget->isTargetDarwin())
if (!Subtarget->isTargetDarwin() && !Subtarget->isTargetELF())
setOperationAction(ISD::DEBUG_LABEL, MVT::Other, Expand);
// VASTART needs to be custom lowered to use the VarArgsFrameIndex

6
lib/Target/X86/X86InstrInfo.td
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@@ -2451,9 +2451,9 @@ def DWARF_LOC : I<0, Pseudo, (ops i32imm:$line, i32imm:$col, i32imm:$file),
[(dwarf_loc (i32 imm:$line), (i32 imm:$col),
(i32 imm:$file))]>;
def DWARF_LABEL : I<0, Pseudo, (ops i32imm:$id),
"\nLdebug_loc${id:debug}:",
[(dwarf_label (i32 imm:$id))]>;
def DWARF_LABEL : I<0, Pseudo, (ops i32imm:$id),
"\n${:private}debug_loc${id:debug}:",
[(dwarf_label (i32 imm:$id))]>;
//===----------------------------------------------------------------------===//
// Non-Instruction Patterns

24
lib/Target/X86/X86TargetAsmInfo.cpp
View File

@@ -60,6 +60,30 @@ X86TargetAsmInfo::X86TargetAsmInfo(const X86TargetMachine &TM) {
DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
break;
case X86Subtarget::isELF:
// Set up DWARF directives
HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
// bool HasLEB128; // Defaults to false.
// hasDotLoc - True if target asm supports .loc directives.
// bool HasDotLoc; // Defaults to false.
// HasDotFile - True if target asm supports .file directives.
// bool HasDotFile; // Defaults to false.
PrivateGlobalPrefix = "."; // Prefix for private global symbols
DwarfRequiresFrameSection = false;
DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",@progbits";
DwarfInfoSection = "\t.section\t.debug_info,\"\",@progbits";
DwarfLineSection = "\t.section\t.debug_line,\"\",@progbits";
DwarfFrameSection = "\t.section\t.debug_frame,\"\",@progbits";
DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",@progbits";
DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",@progbits";
DwarfStrSection = "\t.section\t.debug_str,\"\",@progbits";
DwarfLocSection = "\t.section\t.debug_loc,\"\",@progbits";
DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
DwarfRangesSection = "\t.section\t.debug_ranges,\"\",@progbits";
DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
break;
case X86Subtarget::isCygwin:
GlobalPrefix = "_";
COMMDirectiveTakesAlignment = false;