1 //===-- ARMTargetAsmInfo.cpp - ARM asm properties ---------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by James M. Laskey and is distributed under the
6 // University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the declarations of the ARMTargetAsmInfo properties.
12 //===----------------------------------------------------------------------===//
14 #include "ARMTargetAsmInfo.h"
15 #include "ARMTargetMachine.h"
20 ARMTargetAsmInfo::ARMTargetAsmInfo(const ARMTargetMachine &TM) {
21 const ARMSubtarget *Subtarget = &TM.getSubtarget<ARMSubtarget>();
22 if (Subtarget->isTargetDarwin()) {
24 PrivateGlobalPrefix = "L";
25 BSSSection = 0; // no BSS section.
26 ZeroFillDirective = "\t.zerofill\t"; // Uses .zerofill
27 SetDirective = "\t.set";
28 WeakRefDirective = "\t.weak_reference\t";
29 HiddenDirective = "\t.private_extern\t";
30 JumpTableDataSection = ".const";
31 CStringSection = "\t.cstring";
32 FourByteConstantSection = "\t.literal4\n";
33 EightByteConstantSection = "\t.literal8\n";
34 ReadOnlySection = "\t.const\n";
35 HasDotTypeDotSizeDirective = false;
36 if (TM.getRelocationModel() == Reloc::Static) {
37 StaticCtorsSection = ".constructor";
38 StaticDtorsSection = ".destructor";
40 StaticCtorsSection = ".mod_init_func";
41 StaticDtorsSection = ".mod_term_func";
44 // In non-PIC modes, emit a special label before jump tables so that the
45 // linker can perform more accurate dead code stripping.
46 if (TM.getRelocationModel() != Reloc::PIC_) {
47 // Emit a local label that is preserved until the linker runs.
48 JumpTableSpecialLabelPrefix = "l";
52 DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
53 DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
54 DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
55 DwarfFrameSection = ".section __DWARF,__debug_frame,regular,debug";
56 DwarfPubNamesSection = ".section __DWARF,__debug_pubnames,regular,debug";
57 DwarfPubTypesSection = ".section __DWARF,__debug_pubtypes,regular,debug";
58 DwarfStrSection = ".section __DWARF,__debug_str,regular,debug";
59 DwarfLocSection = ".section __DWARF,__debug_loc,regular,debug";
60 DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug";
61 DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
62 DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
64 PrivateGlobalPrefix = ".L";
65 WeakRefDirective = "\t.weak\t";
66 if (Subtarget->isAAPCS_ABI()) {
67 StaticCtorsSection = "\t.section .init_array,\"aw\",%init_array";
68 StaticDtorsSection = "\t.section .fini_array,\"aw\",%fini_array";
70 StaticCtorsSection = "\t.section .ctors,\"aw\",%progbits";
71 StaticDtorsSection = "\t.section .dtors,\"aw\",%progbits";
73 TLSDataSection = "\t.section .tdata,\"awT\",%progbits";
74 TLSBSSSection = "\t.section .tbss,\"awT\",%nobits";
77 ZeroDirective = "\t.space\t";
78 AlignmentIsInBytes = false;
79 Data64bitsDirective = 0;
81 DataSection = "\t.data";
82 ConstantPoolSection = "\t.text\n";
83 COMMDirectiveTakesAlignment = false;
84 InlineAsmStart = "@ InlineAsm Start";
85 InlineAsmEnd = "@ InlineAsm End";
86 LCOMMDirective = "\t.lcomm\t";
87 isThumb = Subtarget->isThumb();
90 /// ARM-specific version of TargetAsmInfo::getInlineAsmLength.
91 unsigned ARMTargetAsmInfo::getInlineAsmLength(const char *Str) const {
92 // Count the number of bytes in the asm.
93 bool atInsnStart = true;
98 while (*Str && isspace(*Str) && *Str != '\n')
101 for (const char* p = Str; *p && !isspace(*p); p++)
106 // Ignore everything from comment char(s) to EOL
107 if (strncmp(Str, CommentString, strlen(CommentString))==-0)
113 // BL and BLX <non-reg> are 4 bytes, all others 2.
115 if ((*Str=='b' || *Str=='B') &&
116 (*(Str+1)=='l' || *(Str+1)=='L')) {
117 if (*(Str+2)=='x' || *(Str+2)=='X') {
118 const char* p = Str+3;
119 while (*p && isspace(*p))
121 if (*p == 'r' || *p=='R')
122 Length += 2; // BLX reg
124 Length += 4; // BLX non-reg
129 Length += 2; // Thumb anything else
135 if (*Str == '\n' || *Str == SeparatorChar)