1 //===-- ARMTargetAsmInfo.cpp - ARM 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 ARMTargetAsmInfo properties.
12 //===----------------------------------------------------------------------===//
14 #include "ARMTargetAsmInfo.h"
15 #include "ARMTargetMachine.h"
20 const char *const llvm::arm_asm_table[] = {
46 ARMDarwinTargetAsmInfo::ARMDarwinTargetAsmInfo(const ARMTargetMachine &TM):
47 ARMTargetAsmInfo<DarwinTargetAsmInfo>(TM) {
48 Subtarget = &TM.getSubtarget<ARMSubtarget>();
51 PrivateGlobalPrefix = "L";
52 LessPrivateGlobalPrefix = "l";
53 StringConstantPrefix = "\1LC";
54 BSSSection = 0; // no BSS section
55 ZeroDirective = "\t.space\t";
56 ZeroFillDirective = "\t.zerofill\t"; // Uses .zerofill
57 SetDirective = "\t.set\t";
58 WeakRefDirective = "\t.weak_reference\t";
59 WeakDefDirective = "\t.weak_definition ";
60 HiddenDirective = "\t.private_extern\t";
61 ProtectedDirective = NULL;
62 JumpTableDataSection = ".const";
63 CStringSection = "\t.cstring";
64 HasDotTypeDotSizeDirective = false;
65 HasSingleParameterDotFile = false;
66 NeedsIndirectEncoding = true;
67 AllowQuotesInName = true;
69 if (TM.getRelocationModel() == Reloc::Static) {
70 StaticCtorsSection = ".constructor";
71 StaticDtorsSection = ".destructor";
73 StaticCtorsSection = ".mod_init_func";
74 StaticDtorsSection = ".mod_term_func";
77 // In non-PIC modes, emit a special label before jump tables so that the
78 // linker can perform more accurate dead code stripping.
79 // Emit a local label that is preserved until the linker runs.
80 // We do not check the relocation model here since it can be overridden
82 JumpTableSpecialLabelPrefix = "l";
85 DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
86 DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
87 DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
88 DwarfFrameSection = ".section __DWARF,__debug_frame,regular,debug";
89 DwarfPubNamesSection = ".section __DWARF,__debug_pubnames,regular,debug";
90 DwarfPubTypesSection = ".section __DWARF,__debug_pubtypes,regular,debug";
91 DwarfStrSection = ".section __DWARF,__debug_str,regular,debug";
92 DwarfLocSection = ".section __DWARF,__debug_loc,regular,debug";
93 DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug";
94 DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
95 DwarfMacroInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
98 ARMELFTargetAsmInfo::ARMELFTargetAsmInfo(const ARMTargetMachine &TM):
99 ARMTargetAsmInfo<ELFTargetAsmInfo>(TM) {
100 Subtarget = &TM.getSubtarget<ARMSubtarget>();
104 AbsoluteDebugSectionOffsets = true;
105 CStringSection = ".rodata.str";
106 PrivateGlobalPrefix = ".L";
107 WeakRefDirective = "\t.weak\t";
108 SetDirective = "\t.set\t";
109 DwarfRequiresFrameSection = false;
110 DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",%progbits";
111 DwarfInfoSection = "\t.section\t.debug_info,\"\",%progbits";
112 DwarfLineSection = "\t.section\t.debug_line,\"\",%progbits";
113 DwarfFrameSection = "\t.section\t.debug_frame,\"\",%progbits";
114 DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",%progbits";
115 DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",%progbits";
116 DwarfStrSection = "\t.section\t.debug_str,\"\",%progbits";
117 DwarfLocSection = "\t.section\t.debug_loc,\"\",%progbits";
118 DwarfARangesSection = "\t.section\t.debug_aranges,\"\",%progbits";
119 DwarfRangesSection = "\t.section\t.debug_ranges,\"\",%progbits";
120 DwarfMacroInfoSection = "\t.section\t.debug_macinfo,\"\",%progbits";
122 if (Subtarget->isAAPCS_ABI()) {
123 StaticCtorsSection = "\t.section .init_array,\"aw\",%init_array";
124 StaticDtorsSection = "\t.section .fini_array,\"aw\",%fini_array";
126 StaticCtorsSection = "\t.section .ctors,\"aw\",%progbits";
127 StaticDtorsSection = "\t.section .dtors,\"aw\",%progbits";
131 /// Count the number of comma-separated arguments.
132 /// Do not try to detect errors.
133 template <class BaseTAI>
134 unsigned ARMTargetAsmInfo<BaseTAI>::countArguments(const char* p) const {
136 while (*p && isspace(*p) && *p != '\n')
139 while (*p && *p!='\n' &&
140 strncmp(p, BaseTAI::CommentString,
141 strlen(BaseTAI::CommentString))!=0) {
149 /// Count the length of a string enclosed in quote characters.
150 /// Do not try to detect errors.
151 template <class BaseTAI>
152 unsigned ARMTargetAsmInfo<BaseTAI>::countString(const char* p) const {
154 while (*p && isspace(*p) && *p!='\n')
156 if (!*p || *p != '\"')
158 while (*++p && *p != '\"')
163 /// ARM-specific version of TargetAsmInfo::getInlineAsmLength.
164 template <class BaseTAI>
165 unsigned ARMTargetAsmInfo<BaseTAI>::getInlineAsmLength(const char *s) const {
166 // Make a lowercase-folded version of s for counting purposes.
167 char *q, *s_copy = (char *)malloc(strlen(s) + 1);
169 for (q=s_copy; *q; q++)
171 const char *Str = s_copy;
173 // Count the number of bytes in the asm.
174 bool atInsnStart = true;
175 bool inTextSection = true;
177 for (; *Str; ++Str) {
180 while (*Str && isspace(*Str) && *Str != '\n')
183 for (const char* p = Str; *p && !isspace(*p); p++)
186 while (*Str && isspace(*Str) && *Str != '\n')
191 if (*Str == 0) break;
193 // Ignore everything from comment char(s) to EOL
194 if (strncmp(Str, BaseTAI::CommentString,
195 strlen(BaseTAI::CommentString)) == 0)
197 // FIXME do something like the following for non-Darwin
198 else if (*Str == '.' && Subtarget->isTargetDarwin()) {
202 // Some change the section, but don't generate code.
203 if (strncmp(Str, ".literal4", strlen(".literal4"))==0 ||
204 strncmp(Str, ".literal8", strlen(".literal8"))==0 ||
205 strncmp(Str, ".const", strlen(".const"))==0 ||
206 strncmp(Str, ".constructor", strlen(".constructor"))==0 ||
207 strncmp(Str, ".cstring", strlen(".cstring"))==0 ||
208 strncmp(Str, ".data", strlen(".data"))==0 ||
209 strncmp(Str, ".destructor", strlen(".destructor"))==0 ||
210 strncmp(Str, ".fvmlib_init0", strlen(".fvmlib_init0"))==0 ||
211 strncmp(Str, ".fvmlib_init1", strlen(".fvmlib_init1"))==0 ||
212 strncmp(Str, ".mod_init_func", strlen(".mod_init_func"))==0 ||
213 strncmp(Str, ".mod_term_func", strlen(".mod_term_func"))==0 ||
214 strncmp(Str, ".picsymbol_stub", strlen(".picsymbol_stub"))==0 ||
215 strncmp(Str, ".symbol_stub", strlen(".symbol_stub"))==0 ||
216 strncmp(Str, ".static_data", strlen(".static_data"))==0 ||
217 strncmp(Str, ".section", strlen(".section"))==0 ||
218 strncmp(Str, ".lazy_symbol_pointer", strlen(".lazy_symbol_pointer"))==0 ||
219 strncmp(Str, ".non_lazy_symbol_pointer", strlen(".non_lazy_symbol_pointer"))==0 ||
220 strncmp(Str, ".dyld", strlen(".dyld"))==0 ||
221 strncmp(Str, ".const_data", strlen(".const_data"))==0 ||
222 strncmp(Str, ".objc", strlen(".objc"))==0 || //// many directives
223 strncmp(Str, ".static_const", strlen(".static_const"))==0)
225 else if (strncmp(Str, ".text", strlen(".text"))==0)
226 inTextSection = true;
227 // Some can't really be handled without implementing significant pieces
228 // of an assembler. Others require dynamic adjustment of block sizes in
229 // AdjustBBOffsetsAfter; it's a big compile-time speed hit to check every
230 // instruction in there, and none of these are currently used in the kernel.
231 else if (strncmp(Str, ".macro", strlen(".macro"))==0 ||
232 strncmp(Str, ".if", strlen(".if"))==0 ||
233 strncmp(Str, ".align", strlen(".align"))==0 ||
234 strncmp(Str, ".fill", strlen(".fill"))==0 ||
235 strncmp(Str, ".space", strlen(".space"))==0 ||
236 strncmp(Str, ".zerofill", strlen(".zerofill"))==0 ||
237 strncmp(Str, ".p2align", strlen(".p2align"))==0 ||
238 strncmp(Str, ".p2alignw", strlen(".p2alignw"))==0 ||
239 strncmp(Str, ".p2alignl", strlen(".p2alignl"))==0 ||
240 strncmp(Str, ".align32", strlen(".p2align32"))==0 ||
241 strncmp(Str, ".include", strlen(".include"))==0)
242 cerr << "Directive " << Str << " in asm may lead to invalid offsets for" <<
243 " constant pools (the assembler will tell you if this happens).\n";
244 // Some generate code, but this is only interesting in the text section.
245 else if (inTextSection) {
246 if (strncmp(Str, ".long", strlen(".long"))==0)
247 Length += 4*countArguments(Str+strlen(".long"));
248 else if (strncmp(Str, ".short", strlen(".short"))==0)
249 Length += 2*countArguments(Str+strlen(".short"));
250 else if (strncmp(Str, ".byte", strlen(".byte"))==0)
251 Length += 1*countArguments(Str+strlen(".byte"));
252 else if (strncmp(Str, ".single", strlen(".single"))==0)
253 Length += 4*countArguments(Str+strlen(".single"));
254 else if (strncmp(Str, ".double", strlen(".double"))==0)
255 Length += 8*countArguments(Str+strlen(".double"));
256 else if (strncmp(Str, ".quad", strlen(".quad"))==0)
257 Length += 16*countArguments(Str+strlen(".quad"));
258 else if (strncmp(Str, ".ascii", strlen(".ascii"))==0)
259 Length += countString(Str+strlen(".ascii"));
260 else if (strncmp(Str, ".asciz", strlen(".asciz"))==0)
261 Length += countString(Str+strlen(".asciz"))+1;
263 } else if (inTextSection) {
266 if (Subtarget->isThumb()) {
267 // BL and BLX <non-reg> are 4 bytes, all others 2.
268 if (strncmp(Str, "blx", strlen("blx"))==0) {
269 const char* p = Str+3;
270 while (*p && isspace(*p))
272 if (*p == 'r' || *p=='R')
273 Length += 2; // BLX reg
275 Length += 4; // BLX non-reg
276 } else if (strncmp(Str, "bl", strlen("bl"))==0)
279 Length += 2; // Thumb anything else
285 if (*Str == '\n' || *Str == BaseTAI::SeparatorChar)
292 // Instantiate default implementation.
293 TEMPLATE_INSTANTIATION(class ARMTargetAsmInfo<TargetAsmInfo>);