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//===-- X86TargetAsmInfo.cpp - X86 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 X86TargetAsmInfo properties.
//
//===----------------------------------------------------------------------===//
#include "X86TargetAsmInfo.h"
#include "X86TargetMachine.h"
#include "X86Subtarget.h"
#include "llvm/DerivedTypes.h"
#include "llvm/InlineAsm.h"
#include "llvm/Instructions.h"
#include "llvm/Intrinsics.h"
#include "llvm/Module.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
using namespace llvm::dwarf;
const char *const llvm::x86_asm_table[] = {
"{si}", "S",
"{di}", "D",
"{ax}", "a",
"{cx}", "c",
"{memory}", "memory",
"{flags}", "",
"{dirflag}", "",
"{fpsr}", "",
"{cc}", "cc",
0,0};
X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
X86TargetAsmInfo<DarwinTargetAsmInfo>(TM) {
const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
bool is64Bit = Subtarget->is64Bit();
AlignmentIsInBytes = false;
TextAlignFillValue = 0x90;
if (!is64Bit)
Data64bitsDirective = 0; // we can't emit a 64-bit unit
ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
ZeroFillDirective = "\t.zerofill\t"; // Uses .zerofill
if (TM.getRelocationModel() != Reloc::Static)
ConstantPoolSection = "\t.const_data";
else
ConstantPoolSection = "\t.const\n";
LCOMMDirective = "\t.lcomm\t";
// Leopard and above support aligned common symbols.
COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
HasDotTypeDotSizeDirective = false;
if (is64Bit) {
PersonalityPrefix = "";
PersonalitySuffix = "+4@GOTPCREL";
} else {
PersonalityPrefix = "L";
PersonalitySuffix = "$non_lazy_ptr";
}
InlineAsmStart = "## InlineAsm Start";
InlineAsmEnd = "## InlineAsm End";
CommentString = "##";
SetDirective = "\t.set";
PCSymbol = ".";
UsedDirective = "\t.no_dead_strip\t";
ProtectedDirective = "\t.globl\t";
SupportsDebugInformation = true;
DwarfDebugInlineSection = ".section __DWARF,__debug_inlined,regular,debug";
DwarfUsesInlineInfoSection = true;
// Exceptions handling
SupportsExceptionHandling = true;
GlobalEHDirective = "\t.globl\t";
SupportsWeakOmittedEHFrame = false;
AbsoluteEHSectionOffsets = false;
DwarfEHFrameSection =
".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
}
unsigned
X86DarwinTargetAsmInfo::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);
if (Reason == DwarfEncoding::CodeLabels || !Global)
return DW_EH_PE_pcrel;
return DW_EH_PE_absptr;
}
const char *
X86DarwinTargetAsmInfo::getEHGlobalPrefix() const {
const X86Subtarget* Subtarget = &TM.getSubtarget<X86Subtarget>();
if (Subtarget->getDarwinVers() > 9)
return PrivateGlobalPrefix;
return "";
}
X86ELFTargetAsmInfo::X86ELFTargetAsmInfo(const X86TargetMachine &TM) :
X86TargetAsmInfo<ELFTargetAsmInfo>(TM) {
CStringSection = ".rodata.str";
PrivateGlobalPrefix = ".L";
WeakRefDirective = "\t.weak\t";
SetDirective = "\t.set\t";
PCSymbol = ".";
// Set up DWARF directives
HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
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";
// Exceptions handling
SupportsExceptionHandling = true;
AbsoluteEHSectionOffsets = false;
DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
// On Linux we must declare when we can use a non-executable stack.
if (TM.getSubtarget<X86Subtarget>().isLinux())
NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
}
unsigned
X86ELFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
CodeModel::Model CM = TM.getCodeModel();
bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
if (TM.getRelocationModel() == Reloc::PIC_) {
unsigned Format = 0;
if (!is64Bit)
// 32 bit targets always encode pointers as 4 bytes
Format = DW_EH_PE_sdata4;
else {
// 64 bit targets encode pointers in 4 bytes iff:
// - code model is small OR
// - code model is medium and we're emitting externally visible symbols
// or any code symbols
if (CM == CodeModel::Small ||
(CM == CodeModel::Medium && (Global ||
Reason != DwarfEncoding::Data)))
Format = DW_EH_PE_sdata4;
else
Format = DW_EH_PE_sdata8;
}
if (Global)
Format |= DW_EH_PE_indirect;
return (Format | DW_EH_PE_pcrel);
} else {
if (is64Bit &&
(CM == CodeModel::Small ||
(CM == CodeModel::Medium && Reason != DwarfEncoding::Data)))
return DW_EH_PE_udata4;
else
return DW_EH_PE_absptr;
}
}
unsigned
X86COFFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
CodeModel::Model CM = TM.getCodeModel();
bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
if (TM.getRelocationModel() == Reloc::PIC_) {
unsigned Format = 0;
if (!is64Bit)
// 32 bit targets always encode pointers as 4 bytes
Format = DW_EH_PE_sdata4;
else {
// 64 bit targets encode pointers in 4 bytes iff:
// - code model is small OR
// - code model is medium and we're emitting externally visible symbols
// or any code symbols
if (CM == CodeModel::Small ||
(CM == CodeModel::Medium && (Global ||
Reason != DwarfEncoding::Data)))
Format = DW_EH_PE_sdata4;
else
Format = DW_EH_PE_sdata8;
}
if (Global)
Format |= DW_EH_PE_indirect;
return (Format | DW_EH_PE_pcrel);
}
if (is64Bit &&
(CM == CodeModel::Small ||
(CM == CodeModel::Medium && Reason != DwarfEncoding::Data)))
return DW_EH_PE_udata4;
return DW_EH_PE_absptr;
}
X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
X86TargetAsmInfo<TargetAsmInfo>(TM) {
GlobalPrefix = "_";
CommentString = ";";
InlineAsmStart = "; InlineAsm Start";
InlineAsmEnd = "; InlineAsm End";
PrivateGlobalPrefix = "$";
AlignDirective = "\tALIGN\t";
ZeroDirective = "\tdb\t";
ZeroDirectiveSuffix = " dup(0)";
AsciiDirective = "\tdb\t";
AscizDirective = 0;
Data8bitsDirective = "\tdb\t";
Data16bitsDirective = "\tdw\t";
Data32bitsDirective = "\tdd\t";
Data64bitsDirective = "\tdq\t";
HasDotTypeDotSizeDirective = false;
HasSingleParameterDotFile = false;
AlignmentIsInBytes = true;
TextSection = getOrCreateSection("_text", true, SectionKind::Text);
DataSection = getOrCreateSection("_data", true, SectionKind::DataRel);
JumpTableDataSection = NULL;
SwitchToSectionDirective = "";
TextSectionStartSuffix = "\tSEGMENT PARA 'CODE'";
DataSectionStartSuffix = "\tSEGMENT PARA 'DATA'";
SectionEndDirectiveSuffix = "\tends\n";
}
// Instantiate default implementation.
TEMPLATE_INSTANTIATION(class X86TargetAsmInfo<TargetAsmInfo>);
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