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https://github.com/c64scene-ar/llvm-6502.git
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8c6ed05157
Eliminate the PersonalityPrefix/Suffix & NeedsIndirectEncoding fields from MAI: they aren't part of the asm syntax, they are related to the structure of the object file. To replace their functionality, add a new TLOF::getSymbolForDwarfGlobalReference method which asks targets to decide how to reference a global from EH in a pc-relative way. The default implementation just returns the symbol. The default darwin implementation references the symbol through an indirect $non_lazy_ptr stub. The bizarro x86-64 darwin specialization handles the weird "foo@GOTPCREL+4" hack. DwarfException.cpp now uses this to emit the reference to the symbol in the right way, and this also eliminates another horrible hack from DwarfException.cpp: - if (strcmp(MAI->getPersonalitySuffix(), "+4@GOTPCREL")) - O << "-" << MAI->getPCSymbol(); git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81991 91177308-0d34-0410-b5e6-96231b3b80d8
124 lines
3.4 KiB
C++
124 lines
3.4 KiB
C++
//===-- X86MCAsmInfo.cpp - X86 asm properties -----------------------------===//
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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 X86MCAsmInfo properties.
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//
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//===----------------------------------------------------------------------===//
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#include "X86MCAsmInfo.h"
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#include "X86TargetMachine.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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enum AsmWriterFlavorTy {
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// Note: This numbering has to match the GCC assembler dialects for inline
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// asm alternatives to work right.
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ATT = 0, Intel = 1
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};
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static cl::opt<AsmWriterFlavorTy>
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AsmWriterFlavor("x86-asm-syntax", cl::init(ATT),
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cl::desc("Choose style of code to emit from X86 backend:"),
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cl::values(clEnumValN(ATT, "att", "Emit AT&T-style assembly"),
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clEnumValN(Intel, "intel", "Emit Intel-style assembly"),
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clEnumValEnd));
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static const char *const x86_asm_table[] = {
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"{si}", "S",
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"{di}", "D",
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"{ax}", "a",
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"{cx}", "c",
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"{memory}", "memory",
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"{flags}", "",
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"{dirflag}", "",
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"{fpsr}", "",
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"{cc}", "cc",
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0,0};
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X86MCAsmInfoDarwin::X86MCAsmInfoDarwin(const Triple &Triple) {
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AsmTransCBE = x86_asm_table;
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AssemblerDialect = AsmWriterFlavor;
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bool is64Bit = Triple.getArch() == Triple::x86_64;
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TextAlignFillValue = 0x90;
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if (!is64Bit)
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Data64bitsDirective = 0; // we can't emit a 64-bit unit
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// Leopard and above support aligned common symbols.
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COMMDirectiveTakesAlignment = Triple.getDarwinMajorNumber() >= 9;
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CommentString = "##";
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PCSymbol = ".";
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SupportsDebugInformation = true;
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DwarfUsesInlineInfoSection = true;
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// Exceptions handling
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ExceptionsType = ExceptionHandling::Dwarf;
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AbsoluteEHSectionOffsets = false;
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}
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X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &Triple) {
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AsmTransCBE = x86_asm_table;
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AssemblerDialect = AsmWriterFlavor;
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PrivateGlobalPrefix = ".L";
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WeakRefDirective = "\t.weak\t";
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SetDirective = "\t.set\t";
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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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// Debug Information
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AbsoluteDebugSectionOffsets = true;
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SupportsDebugInformation = true;
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// Exceptions handling
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ExceptionsType = ExceptionHandling::Dwarf;
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AbsoluteEHSectionOffsets = false;
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// On Linux we must declare when we can use a non-executable stack.
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if (Triple.getOS() == Triple::Linux)
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NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
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}
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X86MCAsmInfoCOFF::X86MCAsmInfoCOFF(const Triple &Triple) {
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AsmTransCBE = x86_asm_table;
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AssemblerDialect = AsmWriterFlavor;
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}
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X86WinMCAsmInfo::X86WinMCAsmInfo(const Triple &Triple) {
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AsmTransCBE = x86_asm_table;
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AssemblerDialect = AsmWriterFlavor;
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GlobalPrefix = "_";
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CommentString = ";";
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PrivateGlobalPrefix = "$";
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AlignDirective = "\tALIGN\t";
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ZeroDirective = "\tdb\t";
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ZeroDirectiveSuffix = " dup(0)";
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AsciiDirective = "\tdb\t";
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AscizDirective = 0;
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Data8bitsDirective = "\tdb\t";
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Data16bitsDirective = "\tdw\t";
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Data32bitsDirective = "\tdd\t";
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Data64bitsDirective = "\tdq\t";
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HasDotTypeDotSizeDirective = false;
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HasSingleParameterDotFile = false;
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AlignmentIsInBytes = true;
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}
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