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 PPCDarwinTargetAsmInfo::PPCDarwinTargetAsmInfo(const PPCTargetMachine &TM):
23 PPCTargetAsmInfo<DarwinTargetAsmInfo>(TM) {
27 PrivateGlobalPrefix = "L";
28 LessPrivateGlobalPrefix = "l";
29 StringConstantPrefix = "\1LC";
30 ConstantPoolSection = "\t.const\t";
31 JumpTableDataSection = ".const";
32 CStringSection = "\t.cstring";
33 if (TM.getRelocationModel() == Reloc::Static) {
34 StaticCtorsSection = ".constructor";
35 StaticDtorsSection = ".destructor";
37 StaticCtorsSection = ".mod_init_func";
38 StaticDtorsSection = ".mod_term_func";
40 SwitchToSectionDirective = "\t.section ";
41 UsedDirective = "\t.no_dead_strip\t";
42 WeakDefDirective = "\t.weak_definition ";
43 WeakRefDirective = "\t.weak_reference ";
44 HiddenDirective = "\t.private_extern ";
45 SupportsExceptionHandling = true;
46 NeedsIndirectEncoding = true;
51 ".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
52 DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
53 GlobalEHDirective = "\t.globl\t";
54 SupportsWeakOmittedEHFrame = false;
56 DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
57 DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
58 DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
59 DwarfFrameSection = ".section __DWARF,__debug_frame,regular,debug";
60 DwarfPubNamesSection = ".section __DWARF,__debug_pubnames,regular,debug";
61 DwarfPubTypesSection = ".section __DWARF,__debug_pubtypes,regular,debug";
62 DwarfStrSection = ".section __DWARF,__debug_str,regular,debug";
63 DwarfLocSection = ".section __DWARF,__debug_loc,regular,debug";
64 DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug";
65 DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
66 DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
68 // In non-PIC modes, emit a special label before jump tables so that the
69 // linker can perform more accurate dead code stripping.
70 if (TM.getRelocationModel() != Reloc::PIC_) {
71 // Emit a local label that is preserved until the linker runs.
72 JumpTableSpecialLabelPrefix = "l";
76 /// PreferredEHDataFormat - This hook allows the target to select data
77 /// format used for encoding pointers in exception handling data. Reason is
78 /// 0 for data, 1 for code labels, 2 for function pointers. Global is true
79 /// if the symbol can be relocated.
81 PPCDarwinTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
83 if (Reason == DwarfEncoding::Functions && Global)
84 return (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4);
85 else if (Reason == DwarfEncoding::CodeLabels || !Global)
86 return DW_EH_PE_pcrel;
88 return DW_EH_PE_absptr;
92 PPCLinuxTargetAsmInfo::PPCLinuxTargetAsmInfo(const PPCTargetMachine &TM) :
93 PPCTargetAsmInfo<ELFTargetAsmInfo>(TM) {
96 PrivateGlobalPrefix = "";
97 ConstantPoolSection = "\t.section .rodata.cst4\t";
98 JumpTableDataSection = ".section .rodata.cst4";
99 CStringSection = ".rodata.str";
100 StaticCtorsSection = ".section\t.ctors,\"aw\",@progbits";
101 StaticDtorsSection = ".section\t.dtors,\"aw\",@progbits";
102 UsedDirective = "\t# .no_dead_strip\t";
103 WeakRefDirective = "\t.weak\t";
104 BSSSection = "\t.section\t\".sbss\",\"aw\",@nobits";
106 // PPC/Linux normally uses named section for BSS.
107 BSSSection_ = getNamedSection("\t.bss",
108 SectionFlags::Writeable | SectionFlags::BSS,
109 /* Override */ true);
112 AbsoluteDebugSectionOffsets = true;
113 SupportsDebugInformation = true;
114 DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",@progbits";
115 DwarfInfoSection = "\t.section\t.debug_info,\"\",@progbits";
116 DwarfLineSection = "\t.section\t.debug_line,\"\",@progbits";
117 DwarfFrameSection = "\t.section\t.debug_frame,\"\",@progbits";
118 DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",@progbits";
119 DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",@progbits";
120 DwarfStrSection = "\t.section\t.debug_str,\"\",@progbits";
121 DwarfLocSection = "\t.section\t.debug_loc,\"\",@progbits";
122 DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
123 DwarfRangesSection = "\t.section\t.debug_ranges,\"\",@progbits";
124 DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
128 // Set up DWARF directives
129 HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
131 // Exceptions handling
132 if (!TM.getSubtargetImpl()->isPPC64())
133 SupportsExceptionHandling = true;
134 AbsoluteEHSectionOffsets = false;
135 DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
136 DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
139 /// PreferredEHDataFormat - This hook allows the target to select data
140 /// format used for encoding pointers in exception handling data. Reason is
141 /// 0 for data, 1 for code labels, 2 for function pointers. Global is true
142 /// if the symbol can be relocated.
144 PPCLinuxTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
146 // We really need to write something here.
147 return TargetAsmInfo::PreferredEHDataFormat(Reason, Global);
150 // Instantiate default implementation.
151 TEMPLATE_INSTANTIATION(class PPCTargetAsmInfo<TargetAsmInfo>);