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117 lines
4.5 KiB
C++
117 lines
4.5 KiB
C++
//===-- PPCTargetAsmInfo.cpp - PPC asm properties ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declarations of the DarwinTargetAsmInfo properties.
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//
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//===----------------------------------------------------------------------===//
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#include "PPCTargetAsmInfo.h"
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#include "PPCTargetMachine.h"
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#include "llvm/Function.h"
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#include "llvm/Support/Dwarf.h"
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using namespace llvm;
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using namespace llvm::dwarf;
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PPCDarwinTargetAsmInfo::PPCDarwinTargetAsmInfo(const PPCTargetMachine &TM) :
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PPCTargetAsmInfo<DarwinTargetAsmInfo>(TM) {
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PCSymbol = ".";
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CommentString = ";";
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ConstantPoolSection = "\t.const\t";
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UsedDirective = "\t.no_dead_strip\t";
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SupportsExceptionHandling = true;
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DwarfEHFrameSection =
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".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
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DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
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GlobalEHDirective = "\t.globl\t";
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SupportsWeakOmittedEHFrame = false;
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}
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/// PreferredEHDataFormat - This hook allows the target to select data
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/// format used for encoding pointers in exception handling data. Reason is
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/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
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/// if the symbol can be relocated.
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unsigned
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PPCDarwinTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
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bool Global) const {
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if (Reason == DwarfEncoding::Functions && Global)
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return (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4);
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else if (Reason == DwarfEncoding::CodeLabels || !Global)
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return DW_EH_PE_pcrel;
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else
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return DW_EH_PE_absptr;
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}
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const char *PPCDarwinTargetAsmInfo::getEHGlobalPrefix() const {
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const PPCSubtarget* Subtarget = &TM.getSubtarget<PPCSubtarget>();
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if (Subtarget->getDarwinVers() > 9)
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return PrivateGlobalPrefix;
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return "";
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}
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PPCLinuxTargetAsmInfo::PPCLinuxTargetAsmInfo(const PPCTargetMachine &TM) :
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PPCTargetAsmInfo<ELFTargetAsmInfo>(TM) {
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CommentString = "#";
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GlobalPrefix = "";
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PrivateGlobalPrefix = ".L";
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ConstantPoolSection = "\t.section .rodata.cst4\t";
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JumpTableDataSection = ".section .rodata.cst4";
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CStringSection = ".rodata.str";
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StaticCtorsSection = ".section\t.ctors,\"aw\",@progbits";
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StaticDtorsSection = ".section\t.dtors,\"aw\",@progbits";
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UsedDirective = "\t# .no_dead_strip\t";
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WeakRefDirective = "\t.weak\t";
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BSSSection = "\t.section\t\".sbss\",\"aw\",@nobits";
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// PPC/Linux normally uses named section for BSS.
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BSSSection_ = getOrCreateSection("\t.bss", true, SectionKind::BSS);
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// Debug Information
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AbsoluteDebugSectionOffsets = true;
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SupportsDebugInformation = true;
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DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",@progbits";
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DwarfInfoSection = "\t.section\t.debug_info,\"\",@progbits";
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DwarfLineSection = "\t.section\t.debug_line,\"\",@progbits";
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DwarfFrameSection = "\t.section\t.debug_frame,\"\",@progbits";
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DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",@progbits";
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DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",@progbits";
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DwarfStrSection = "\t.section\t.debug_str,\"\",@progbits";
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DwarfLocSection = "\t.section\t.debug_loc,\"\",@progbits";
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DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
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DwarfRangesSection = "\t.section\t.debug_ranges,\"\",@progbits";
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DwarfMacroInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
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PCSymbol = ".";
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// Set up DWARF directives
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HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
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// Exceptions handling
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if (!TM.getSubtargetImpl()->isPPC64())
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SupportsExceptionHandling = true;
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AbsoluteEHSectionOffsets = false;
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DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
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DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
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}
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/// PreferredEHDataFormat - This hook allows the target to select data
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/// format used for encoding pointers in exception handling data. Reason is
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/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
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/// if the symbol can be relocated.
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unsigned
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PPCLinuxTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
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bool Global) const {
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// We really need to write something here.
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return TargetAsmInfo::PreferredEHDataFormat(Reason, Global);
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}
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// Instantiate default implementation.
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TEMPLATE_INSTANTIATION(class PPCTargetAsmInfo<TargetAsmInfo>);
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