//
// The LLVM Compiler Infrastructure
//
-// This file was developed by James M. Laskey and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "PPCTargetAsmInfo.h"
#include "PPCTargetMachine.h"
#include "llvm/Function.h"
+#include "llvm/Support/Dwarf.h"
+
using namespace llvm;
+using namespace llvm::dwarf;
-PPCTargetAsmInfo::PPCTargetAsmInfo(const PPCTargetMachine &TM) {
- bool isPPC64 = TM.getSubtargetImpl()->isPPC64();
-
- ZeroDirective = "\t.space\t";
- SetDirective = "\t.set";
- Data64bitsDirective = isPPC64 ? "\t.quad\t" : 0;
- AlignmentIsInBytes = false;
- LCOMMDirective = "\t.lcomm\t";
- InlineAsmStart = "# InlineAsm Start";
- InlineAsmEnd = "# InlineAsm End";
-
+PPCDarwinTargetAsmInfo::PPCDarwinTargetAsmInfo(const PPCTargetMachine &TM):
+ PPCTargetAsmInfo<DarwinTargetAsmInfo>(TM) {
+ PCSymbol = ".";
+ CommentString = ";";
+ GlobalPrefix = "_";
+ PrivateGlobalPrefix = "L";
+ LessPrivateGlobalPrefix = "l";
+ StringConstantPrefix = "\1LC";
+ ConstantPoolSection = "\t.const\t";
+ JumpTableDataSection = ".const";
+ CStringSection = "\t.cstring";
+ if (TM.getRelocationModel() == Reloc::Static) {
+ StaticCtorsSection = ".constructor";
+ StaticDtorsSection = ".destructor";
+ } else {
+ StaticCtorsSection = ".mod_init_func";
+ StaticDtorsSection = ".mod_term_func";
+ }
+ HasSingleParameterDotFile = false;
+ SwitchToSectionDirective = "\t.section ";
+ UsedDirective = "\t.no_dead_strip\t";
+ WeakDefDirective = "\t.weak_definition ";
+ WeakRefDirective = "\t.weak_reference ";
+ HiddenDirective = "\t.private_extern ";
+ SupportsExceptionHandling = true;
+ NeedsIndirectEncoding = true;
NeedsSet = true;
- AddressSize = isPPC64 ? 8 : 4;
+ BSSSection = 0;
+
+ DwarfEHFrameSection =
+ ".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
+ DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
+ GlobalEHDirective = "\t.globl\t";
+ SupportsWeakOmittedEHFrame = false;
+
DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug";
DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
+
+ // In non-PIC modes, emit a special label before jump tables so that the
+ // linker can perform more accurate dead code stripping.
+ if (TM.getRelocationModel() != Reloc::PIC_) {
+ // Emit a local label that is preserved until the linker runs.
+ JumpTableSpecialLabelPrefix = "l";
+ }
}
-DarwinTargetAsmInfo::DarwinTargetAsmInfo(const PPCTargetMachine &TM)
-: PPCTargetAsmInfo(TM)
-{
- CommentString = ";";
- GlobalPrefix = "_";
- PrivateGlobalPrefix = "L";
- ConstantPoolSection = "\t.const\t";
- JumpTableDataSection = ".const";
- CStringSection = "\t.cstring";
- StaticCtorsSection = ".mod_init_func";
- StaticDtorsSection = ".mod_term_func";
- UsedDirective = "\t.no_dead_strip\t";
- WeakRefDirective = "\t.weak_reference\t";
- HiddenDirective = "\t.private_extern\t";
+/// PreferredEHDataFormat - This hook allows the target to select data
+/// format used for encoding pointers in exception handling data. Reason is
+/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
+/// if the symbol can be relocated.
+unsigned
+PPCDarwinTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
+ bool Global) const {
+ if (Reason == DwarfEncoding::Functions && Global)
+ return (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4);
+ else if (Reason == DwarfEncoding::CodeLabels || !Global)
+ return DW_EH_PE_pcrel;
+ else
+ return DW_EH_PE_absptr;
}
-LinuxTargetAsmInfo::LinuxTargetAsmInfo(const PPCTargetMachine &TM)
-: PPCTargetAsmInfo(TM)
+const char *
+PPCDarwinTargetAsmInfo::getEHGlobalPrefix() const
{
+ const PPCSubtarget* Subtarget = &TM.getSubtarget<PPCSubtarget>();
+ if (Subtarget->getDarwinVers() > 9)
+ return PrivateGlobalPrefix;
+ else
+ return "";
+}
+
+PPCLinuxTargetAsmInfo::PPCLinuxTargetAsmInfo(const PPCTargetMachine &TM) :
+ PPCTargetAsmInfo<ELFTargetAsmInfo>(TM) {
CommentString = "#";
GlobalPrefix = "";
- PrivateGlobalPrefix = "";
+ PrivateGlobalPrefix = ".L";
ConstantPoolSection = "\t.section .rodata.cst4\t";
JumpTableDataSection = ".section .rodata.cst4";
- CStringSection = "\t.section\t.rodata";
+ CStringSection = ".rodata.str";
StaticCtorsSection = ".section\t.ctors,\"aw\",@progbits";
StaticDtorsSection = ".section\t.dtors,\"aw\",@progbits";
UsedDirective = "\t# .no_dead_strip\t";
WeakRefDirective = "\t.weak\t";
+ BSSSection = "\t.section\t\".sbss\",\"aw\",@nobits";
+
+ // PPC/Linux normally uses named section for BSS.
+ BSSSection_ = getNamedSection("\t.bss",
+ SectionFlags::Writeable | SectionFlags::BSS,
+ /* Override */ true);
+
+ // Debug Information
+ AbsoluteDebugSectionOffsets = true;
+ SupportsDebugInformation = true;
+ 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";
+
+ PCSymbol = ".";
+
+ // Set up DWARF directives
+ HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
+
+ // Exceptions handling
+ if (!TM.getSubtargetImpl()->isPPC64())
+ SupportsExceptionHandling = true;
+ AbsoluteEHSectionOffsets = false;
+ DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
+ DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
}
+
+/// PreferredEHDataFormat - This hook allows the target to select data
+/// format used for encoding pointers in exception handling data. Reason is
+/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
+/// if the symbol can be relocated.
+unsigned
+PPCLinuxTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
+ bool Global) const {
+ // We really need to write something here.
+ return TargetAsmInfo::PreferredEHDataFormat(Reason, Global);
+}
+
+// Instantiate default implementation.
+TEMPLATE_INSTANTIATION(class PPCTargetAsmInfo<TargetAsmInfo>);
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