1 //===-- PPCTargetAsmInfo.cpp - PPC asm properties ---------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the declarations of the DarwinTargetAsmInfo properties.
12 //===----------------------------------------------------------------------===//
14 #include "PPCTargetAsmInfo.h"
15 #include "PPCTargetMachine.h"
16 #include "llvm/Function.h"
17 #include "llvm/Support/Dwarf.h"
20 using namespace llvm::dwarf;
22 PPCTargetAsmInfo::PPCTargetAsmInfo(const PPCTargetMachine &TM) {
23 bool isPPC64 = TM.getSubtargetImpl()->isPPC64();
25 ZeroDirective = "\t.space\t";
26 SetDirective = "\t.set";
27 Data64bitsDirective = isPPC64 ? "\t.quad\t" : 0;
28 AlignmentIsInBytes = false;
29 LCOMMDirective = "\t.lcomm\t";
30 InlineAsmStart = "# InlineAsm Start";
31 InlineAsmEnd = "# InlineAsm End";
32 AssemblerDialect = TM.getSubtargetImpl()->getAsmFlavor();
35 PPCDarwinTargetAsmInfo::PPCDarwinTargetAsmInfo(const PPCTargetMachine &TM):
36 PPCTargetAsmInfo(TM), DarwinTargetAsmInfo(TM) {
40 PrivateGlobalPrefix = "L";
41 LessPrivateGlobalPrefix = "l";
42 StringConstantPrefix = "\1LC";
43 ConstantPoolSection = "\t.const\t";
44 JumpTableDataSection = ".const";
45 CStringSection = "\t.cstring";
46 if (TM.getRelocationModel() == Reloc::Static) {
47 StaticCtorsSection = ".constructor";
48 StaticDtorsSection = ".destructor";
50 StaticCtorsSection = ".mod_init_func";
51 StaticDtorsSection = ".mod_term_func";
53 SwitchToSectionDirective = "\t.section ";
54 UsedDirective = "\t.no_dead_strip\t";
55 WeakDefDirective = "\t.weak_definition ";
56 WeakRefDirective = "\t.weak_reference ";
57 HiddenDirective = "\t.private_extern ";
58 SupportsExceptionHandling = true;
59 NeedsIndirectEncoding = true;
64 ".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
65 DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
66 GlobalEHDirective = "\t.globl\t";
67 SupportsWeakOmittedEHFrame = false;
69 DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
70 DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
71 DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
72 DwarfFrameSection = ".section __DWARF,__debug_frame,regular,debug";
73 DwarfPubNamesSection = ".section __DWARF,__debug_pubnames,regular,debug";
74 DwarfPubTypesSection = ".section __DWARF,__debug_pubtypes,regular,debug";
75 DwarfStrSection = ".section __DWARF,__debug_str,regular,debug";
76 DwarfLocSection = ".section __DWARF,__debug_loc,regular,debug";
77 DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug";
78 DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
79 DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
81 // In non-PIC modes, emit a special label before jump tables so that the
82 // linker can perform more accurate dead code stripping.
83 if (TM.getRelocationModel() != Reloc::PIC_) {
84 // Emit a local label that is preserved until the linker runs.
85 JumpTableSpecialLabelPrefix = "l";
89 /// PreferredEHDataFormat - This hook allows the target to select data
90 /// format used for encoding pointers in exception handling data. Reason is
91 /// 0 for data, 1 for code labels, 2 for function pointers. Global is true
92 /// if the symbol can be relocated.
94 PPCDarwinTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
96 if (Reason == DwarfEncoding::Functions && Global)
97 return (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4);
98 else if (Reason == DwarfEncoding::CodeLabels || !Global)
99 return DW_EH_PE_pcrel;
101 return DW_EH_PE_absptr;
105 PPCLinuxTargetAsmInfo::PPCLinuxTargetAsmInfo(const PPCTargetMachine &TM) :
106 PPCTargetAsmInfo(TM), ELFTargetAsmInfo(TM) {
109 PrivateGlobalPrefix = "";
110 ConstantPoolSection = "\t.section .rodata.cst4\t";
111 JumpTableDataSection = ".section .rodata.cst4";
112 CStringSection = ".rodata.str";
113 StaticCtorsSection = ".section\t.ctors,\"aw\",@progbits";
114 StaticDtorsSection = ".section\t.dtors,\"aw\",@progbits";
115 UsedDirective = "\t# .no_dead_strip\t";
116 WeakRefDirective = "\t.weak\t";
117 BSSSection = "\t.section\t\".sbss\",\"aw\",@nobits";
119 // PPC/Linux normally uses named section for BSS.
120 BSSSection_ = getNamedSection("\t.bss",
121 SectionFlags::Writeable | SectionFlags::BSS,
122 /* Override */ true);
125 AbsoluteDebugSectionOffsets = true;
126 SupportsDebugInformation = true;
127 DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",@progbits";
128 DwarfInfoSection = "\t.section\t.debug_info,\"\",@progbits";
129 DwarfLineSection = "\t.section\t.debug_line,\"\",@progbits";
130 DwarfFrameSection = "\t.section\t.debug_frame,\"\",@progbits";
131 DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",@progbits";
132 DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",@progbits";
133 DwarfStrSection = "\t.section\t.debug_str,\"\",@progbits";
134 DwarfLocSection = "\t.section\t.debug_loc,\"\",@progbits";
135 DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
136 DwarfRangesSection = "\t.section\t.debug_ranges,\"\",@progbits";
137 DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
141 // Set up DWARF directives
142 HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
144 // Exceptions handling
145 if (!TM.getSubtargetImpl()->isPPC64())
146 SupportsExceptionHandling = true;
147 AbsoluteEHSectionOffsets = false;
148 DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
149 DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
152 /// PreferredEHDataFormat - This hook allows the target to select data
153 /// format used for encoding pointers in exception handling data. Reason is
154 /// 0 for data, 1 for code labels, 2 for function pointers. Global is true
155 /// if the symbol can be relocated.
157 PPCLinuxTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
159 // We really need to write something here.
160 return TargetAsmInfo::PreferredEHDataFormat(Reason, Global);