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https://github.com/c64scene-ar/llvm-6502.git
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f0144127b9
it is highly specific to the object file that will be generated in the end, this introduces a new TargetLoweringObjectFile interface that is implemented for each of ELF/MachO/COFF/Alpha/PIC16 and XCore. Though still is still a brutal and ugly refactoring, this is a major step towards goodness. This patch also: 1. fixes a bunch of dangling pointer problems in the PIC16 backend. 2. disables the TargetLowering copy ctor which PIC16 was accidentally using. 3. gets us closer to xcore having its own crazy target section flags and pic16 not having to shadow sections with its own objects. 4. fixes wierdness where ELF targets would set CStringSection but not CStringSection_. Factor the code better. 5. fixes some bugs in string lowering on ELF targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77294 91177308-0d34-0410-b5e6-96231b3b80d8
114 lines
4.4 KiB
C++
114 lines
4.4 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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// 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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