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//===-- PPCTargetAsmInfo.cpp - PPC asm properties ---------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declarations of the DarwinTargetAsmInfo properties.
//
//===----------------------------------------------------------------------===//
#include "PPCTargetAsmInfo.h"
#include "PPCTargetMachine.h"
#include "llvm/Function.h"
#include "llvm/Support/Dwarf.h"
using namespace llvm;
using namespace llvm::dwarf;
PPCDarwinTargetAsmInfo::PPCDarwinTargetAsmInfo(const PPCTargetMachine &TM) :
PPCTargetAsmInfo<DarwinTargetAsmInfo>(TM) {
PCSymbol = ".";
CommentString = ";";
ConstantPoolSection = "\t.const\t";
UsedDirective = "\t.no_dead_strip\t";
SupportsExceptionHandling = true;
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;
}
/// 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;
}
const char *PPCDarwinTargetAsmInfo::getEHGlobalPrefix() const {
const PPCSubtarget* Subtarget = &TM.getSubtarget<PPCSubtarget>();
if (Subtarget->getDarwinVers() > 9)
return PrivateGlobalPrefix;
return "";
}
PPCLinuxTargetAsmInfo::PPCLinuxTargetAsmInfo(const PPCTargetMachine &TM) :
PPCTargetAsmInfo<ELFTargetAsmInfo>(TM) {
CommentString = "#";
GlobalPrefix = "";
PrivateGlobalPrefix = ".L";
ConstantPoolSection = "\t.section .rodata.cst4\t";
JumpTableDataSection = ".section .rodata.cst4";
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_ = getOrCreateSection("\t.bss", true, SectionKind::BSS);
// 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";
DwarfMacroInfoSection = "\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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