1 //===-- DarwinTargetAsmInfo.cpp - Darwin 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 defines target asm properties related what form asm statements
11 // should take in general on Darwin-based targets
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Constants.h"
16 #include "llvm/DerivedTypes.h"
17 #include "llvm/Function.h"
18 #include "llvm/GlobalVariable.h"
19 #include "llvm/ADT/StringExtras.h"
20 #include "llvm/Support/ErrorHandling.h"
21 #include "llvm/Support/Mangler.h"
22 #include "llvm/Target/DarwinTargetAsmInfo.h"
23 #include "llvm/Target/TargetMachine.h"
24 #include "llvm/Target/TargetData.h"
28 DarwinTargetAsmInfo::DarwinTargetAsmInfo(const TargetMachine &TM)
31 // Common settings for all Darwin targets.
34 PrivateGlobalPrefix = "L";
35 LinkerPrivateGlobalPrefix = "l"; // Marker for some ObjC metadata
37 NeedsIndirectEncoding = true;
38 AllowQuotesInName = true;
39 HasSingleParameterDotFile = false;
41 // In non-PIC modes, emit a special label before jump tables so that the
42 // linker can perform more accurate dead code stripping. We do not check the
43 // relocation model here since it can be overridden later.
44 JumpTableSpecialLabelPrefix = "l";
47 WeakDefDirective = "\t.weak_definition ";
48 WeakRefDirective = "\t.weak_reference ";
49 HiddenDirective = "\t.private_extern ";
52 CStringSection = "\t.cstring";
53 JumpTableDataSection = "\t.const";
56 if (TM.getRelocationModel() == Reloc::Static) {
57 StaticCtorsSection = ".constructor";
58 StaticDtorsSection = ".destructor";
60 StaticCtorsSection = ".mod_init_func";
61 StaticDtorsSection = ".mod_term_func";
64 // _foo.eh symbols are currently always exported so that the linker knows
65 // about them. This may not strictly be necessary on 10.6 and later, but it
66 // doesn't hurt anything.
67 Is_EHSymbolPrivate = 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 DwarfMacroInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
82 /// emitUsedDirectiveFor - On Darwin, internally linked data beginning with
83 /// the PrivateGlobalPrefix or the LinkerPrivateGlobalPrefix does not have the
84 /// directive emitted (this occurs in ObjC metadata).
85 bool DarwinTargetAsmInfo::emitUsedDirectiveFor(const GlobalValue* GV,
86 Mangler *Mang) const {
87 if (!GV) return false;
89 // Check whether the mangled name has the "Private" or "LinkerPrivate" prefix.
90 if (GV->hasLocalLinkage() && !isa<Function>(GV)) {
91 // FIXME: ObjC metadata is currently emitted as internal symbols that have
92 // \1L and \0l prefixes on them. Fix them to be Private/LinkerPrivate and
93 // this horrible hack can go away.
94 const std::string &Name = Mang->getMangledName(GV);
95 if (Name[0] == 'L' || Name[0] == 'l')