1 //===--- ARMAttributeParser.cpp - ARM Attribute Information Printer -------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "ARMAttributeParser.h"
11 #include "StreamWriter.h"
12 #include "llvm/ADT/STLExtras.h"
13 #include "llvm/ADT/StringExtras.h"
14 #include "llvm/Support/LEB128.h"
15
16 using namespace llvm;
17 using namespace llvm::ARMBuildAttrs;
18
19
20 static const EnumEntry<unsigned> TagNames[] = {
21 { "Tag_File", ARMBuildAttrs::File },
22 { "Tag_Section", ARMBuildAttrs::Section },
23 { "Tag_Symbol", ARMBuildAttrs::Symbol },
24 };
25
26 namespace llvm {
27 #define ATTRIBUTE_HANDLER(Attr_) \
28 { ARMBuildAttrs::Attr_, &ARMAttributeParser::Attr_ }
29
30 const ARMAttributeParser::DisplayHandler
31 ARMAttributeParser::DisplayRoutines[] = {
32 { ARMBuildAttrs::CPU_raw_name, &ARMAttributeParser::StringAttribute, },
33 { ARMBuildAttrs::CPU_name, &ARMAttributeParser::StringAttribute },
34 ATTRIBUTE_HANDLER(CPU_arch),
35 ATTRIBUTE_HANDLER(CPU_arch_profile),
36 ATTRIBUTE_HANDLER(ARM_ISA_use),
37 ATTRIBUTE_HANDLER(THUMB_ISA_use),
38 ATTRIBUTE_HANDLER(FP_arch),
39 ATTRIBUTE_HANDLER(WMMX_arch),
40 ATTRIBUTE_HANDLER(Advanced_SIMD_arch),
41 ATTRIBUTE_HANDLER(PCS_config),
42 ATTRIBUTE_HANDLER(ABI_PCS_R9_use),
43 ATTRIBUTE_HANDLER(ABI_PCS_RW_data),
44 ATTRIBUTE_HANDLER(ABI_PCS_RO_data),
45 ATTRIBUTE_HANDLER(ABI_PCS_GOT_use),
46 ATTRIBUTE_HANDLER(ABI_PCS_wchar_t),
47 ATTRIBUTE_HANDLER(ABI_FP_rounding),
48 ATTRIBUTE_HANDLER(ABI_FP_denormal),
49 ATTRIBUTE_HANDLER(ABI_FP_exceptions),
50 ATTRIBUTE_HANDLER(ABI_FP_user_exceptions),
51 ATTRIBUTE_HANDLER(ABI_FP_number_model),
52 ATTRIBUTE_HANDLER(ABI_align_needed),
53 ATTRIBUTE_HANDLER(ABI_align_preserved),
54 ATTRIBUTE_HANDLER(ABI_enum_size),
55 ATTRIBUTE_HANDLER(ABI_HardFP_use),
56 ATTRIBUTE_HANDLER(ABI_VFP_args),
57 ATTRIBUTE_HANDLER(ABI_WMMX_args),
58 ATTRIBUTE_HANDLER(ABI_optimization_goals),
59 ATTRIBUTE_HANDLER(ABI_FP_optimization_goals),
60 ATTRIBUTE_HANDLER(compatibility),
61 ATTRIBUTE_HANDLER(CPU_unaligned_access),
62 ATTRIBUTE_HANDLER(FP_HP_extension),
63 ATTRIBUTE_HANDLER(ABI_FP_16bit_format),
64 ATTRIBUTE_HANDLER(MPextension_use),
65 ATTRIBUTE_HANDLER(DIV_use),
66 ATTRIBUTE_HANDLER(T2EE_use),
67 ATTRIBUTE_HANDLER(Virtualization_use),
68 ATTRIBUTE_HANDLER(nodefaults)
69 };
70
71 #undef ATTRIBUTE_HANDLER
72
ParseInteger(const uint8_t * Data,uint32_t & Offset)73 uint64_t ARMAttributeParser::ParseInteger(const uint8_t *Data,
74 uint32_t &Offset) {
75 unsigned Length;
76 uint64_t Value = decodeULEB128(Data + Offset, &Length);
77 Offset = Offset + Length;
78 return Value;
79 }
80
ParseString(const uint8_t * Data,uint32_t & Offset)81 StringRef ARMAttributeParser::ParseString(const uint8_t *Data,
82 uint32_t &Offset) {
83 const char *String = reinterpret_cast<const char*>(Data + Offset);
84 size_t Length = std::strlen(String);
85 Offset = Offset + Length + 1;
86 return StringRef(String, Length);
87 }
88
IntegerAttribute(AttrType Tag,const uint8_t * Data,uint32_t & Offset)89 void ARMAttributeParser::IntegerAttribute(AttrType Tag, const uint8_t *Data,
90 uint32_t &Offset) {
91 SW.printNumber(ARMBuildAttrs::AttrTypeAsString(Tag),
92 ParseInteger(Data, Offset));
93 }
94
StringAttribute(AttrType Tag,const uint8_t * Data,uint32_t & Offset)95 void ARMAttributeParser::StringAttribute(AttrType Tag, const uint8_t *Data,
96 uint32_t &Offset) {
97 StringRef TagName = ARMBuildAttrs::AttrTypeAsString(Tag, /*TagPrefix*/false);
98
99 DictScope AS(SW, "Attribute");
100 SW.printNumber("Tag", Tag);
101 if (!TagName.empty())
102 SW.printString("TagName", TagName);
103 SW.printString("Value", ParseString(Data, Offset));
104 }
105
PrintAttribute(unsigned Tag,unsigned Value,StringRef ValueDesc)106 void ARMAttributeParser::PrintAttribute(unsigned Tag, unsigned Value,
107 StringRef ValueDesc) {
108 StringRef TagName = ARMBuildAttrs::AttrTypeAsString(Tag, /*TagPrefix*/false);
109
110 DictScope AS(SW, "Attribute");
111 SW.printNumber("Tag", Tag);
112 SW.printNumber("Value", Value);
113 if (!TagName.empty())
114 SW.printString("TagName", TagName);
115 if (!ValueDesc.empty())
116 SW.printString("Description", ValueDesc);
117 }
118
CPU_arch(AttrType Tag,const uint8_t * Data,uint32_t & Offset)119 void ARMAttributeParser::CPU_arch(AttrType Tag, const uint8_t *Data,
120 uint32_t &Offset) {
121 static const char *const Strings[] = {
122 "Pre-v4", "ARM v4", "ARM v4T", "ARM v5T", "ARM v5TE", "ARM v5TEJ", "ARM v6",
123 "ARM v6KZ", "ARM v6T2", "ARM v6K", "ARM v7", "ARM v6-M", "ARM v6S-M",
124 "ARM v7E-M", "ARM v8"
125 };
126
127 uint64_t Value = ParseInteger(Data, Offset);
128 StringRef ValueDesc =
129 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
130 PrintAttribute(Tag, Value, ValueDesc);
131 }
132
CPU_arch_profile(AttrType Tag,const uint8_t * Data,uint32_t & Offset)133 void ARMAttributeParser::CPU_arch_profile(AttrType Tag, const uint8_t *Data,
134 uint32_t &Offset) {
135 uint64_t Encoded = ParseInteger(Data, Offset);
136
137 StringRef Profile;
138 switch (Encoded) {
139 default: Profile = "Unknown"; break;
140 case 'A': Profile = "Application"; break;
141 case 'R': Profile = "Real-time"; break;
142 case 'M': Profile = "Microcontroller"; break;
143 case 'S': Profile = "Classic"; break;
144 case 0: Profile = "None"; break;
145 }
146
147 PrintAttribute(Tag, Encoded, Profile);
148 }
149
ARM_ISA_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)150 void ARMAttributeParser::ARM_ISA_use(AttrType Tag, const uint8_t *Data,
151 uint32_t &Offset) {
152 static const char *const Strings[] = { "Not Permitted", "Permitted" };
153
154 uint64_t Value = ParseInteger(Data, Offset);
155 StringRef ValueDesc =
156 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
157 PrintAttribute(Tag, Value, ValueDesc);
158 }
159
THUMB_ISA_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)160 void ARMAttributeParser::THUMB_ISA_use(AttrType Tag, const uint8_t *Data,
161 uint32_t &Offset) {
162 static const char *const Strings[] = { "Not Permitted", "Thumb-1", "Thumb-2" };
163
164 uint64_t Value = ParseInteger(Data, Offset);
165 StringRef ValueDesc =
166 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
167 PrintAttribute(Tag, Value, ValueDesc);
168 }
169
FP_arch(AttrType Tag,const uint8_t * Data,uint32_t & Offset)170 void ARMAttributeParser::FP_arch(AttrType Tag, const uint8_t *Data,
171 uint32_t &Offset) {
172 static const char *const Strings[] = {
173 "Not Permitted", "VFPv1", "VFPv2", "VFPv3", "VFPv3-D16", "VFPv4",
174 "VFPv4-D16", "ARMv8-a FP", "ARMv8-a FP-D16"
175 };
176
177 uint64_t Value = ParseInteger(Data, Offset);
178 StringRef ValueDesc =
179 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
180 PrintAttribute(Tag, Value, ValueDesc);
181 }
182
WMMX_arch(AttrType Tag,const uint8_t * Data,uint32_t & Offset)183 void ARMAttributeParser::WMMX_arch(AttrType Tag, const uint8_t *Data,
184 uint32_t &Offset) {
185 static const char *const Strings[] = { "Not Permitted", "WMMXv1", "WMMXv2" };
186
187 uint64_t Value = ParseInteger(Data, Offset);
188 StringRef ValueDesc =
189 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
190 PrintAttribute(Tag, Value, ValueDesc);
191 }
192
Advanced_SIMD_arch(AttrType Tag,const uint8_t * Data,uint32_t & Offset)193 void ARMAttributeParser::Advanced_SIMD_arch(AttrType Tag, const uint8_t *Data,
194 uint32_t &Offset) {
195 static const char *const Strings[] = {
196 "Not Permitted", "NEONv1", "NEONv2+FMA", "ARMv8-a NEON", "ARMv8.1-a NEON"
197 };
198
199 uint64_t Value = ParseInteger(Data, Offset);
200 StringRef ValueDesc =
201 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
202 PrintAttribute(Tag, Value, ValueDesc);
203 }
204
PCS_config(AttrType Tag,const uint8_t * Data,uint32_t & Offset)205 void ARMAttributeParser::PCS_config(AttrType Tag, const uint8_t *Data,
206 uint32_t &Offset) {
207 static const char *const Strings[] = {
208 "None", "Bare Platform", "Linux Application", "Linux DSO", "Palm OS 2004",
209 "Reserved (Palm OS)", "Symbian OS 2004", "Reserved (Symbian OS)"
210 };
211
212 uint64_t Value = ParseInteger(Data, Offset);
213 StringRef ValueDesc =
214 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
215 PrintAttribute(Tag, Value, ValueDesc);
216 }
217
ABI_PCS_R9_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)218 void ARMAttributeParser::ABI_PCS_R9_use(AttrType Tag, const uint8_t *Data,
219 uint32_t &Offset) {
220 static const char *const Strings[] = { "v6", "Static Base", "TLS", "Unused" };
221
222 uint64_t Value = ParseInteger(Data, Offset);
223 StringRef ValueDesc =
224 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
225 PrintAttribute(Tag, Value, ValueDesc);
226 }
227
ABI_PCS_RW_data(AttrType Tag,const uint8_t * Data,uint32_t & Offset)228 void ARMAttributeParser::ABI_PCS_RW_data(AttrType Tag, const uint8_t *Data,
229 uint32_t &Offset) {
230 static const char *const Strings[] = {
231 "Absolute", "PC-relative", "SB-relative", "Not Permitted"
232 };
233
234 uint64_t Value = ParseInteger(Data, Offset);
235 StringRef ValueDesc =
236 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
237 PrintAttribute(Tag, Value, ValueDesc);
238 }
239
ABI_PCS_RO_data(AttrType Tag,const uint8_t * Data,uint32_t & Offset)240 void ARMAttributeParser::ABI_PCS_RO_data(AttrType Tag, const uint8_t *Data,
241 uint32_t &Offset) {
242 static const char *const Strings[] = {
243 "Absolute", "PC-relative", "Not Permitted"
244 };
245
246 uint64_t Value = ParseInteger(Data, Offset);
247 StringRef ValueDesc =
248 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
249 PrintAttribute(Tag, Value, ValueDesc);
250 }
251
ABI_PCS_GOT_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)252 void ARMAttributeParser::ABI_PCS_GOT_use(AttrType Tag, const uint8_t *Data,
253 uint32_t &Offset) {
254 static const char *const Strings[] = {
255 "Not Permitted", "Direct", "GOT-Indirect"
256 };
257
258 uint64_t Value = ParseInteger(Data, Offset);
259 StringRef ValueDesc =
260 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
261 PrintAttribute(Tag, Value, ValueDesc);
262 }
263
ABI_PCS_wchar_t(AttrType Tag,const uint8_t * Data,uint32_t & Offset)264 void ARMAttributeParser::ABI_PCS_wchar_t(AttrType Tag, const uint8_t *Data,
265 uint32_t &Offset) {
266 static const char *const Strings[] = {
267 "Not Permitted", "Unknown", "2-byte", "Unknown", "4-byte"
268 };
269
270 uint64_t Value = ParseInteger(Data, Offset);
271 StringRef ValueDesc =
272 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
273 PrintAttribute(Tag, Value, ValueDesc);
274 }
275
ABI_FP_rounding(AttrType Tag,const uint8_t * Data,uint32_t & Offset)276 void ARMAttributeParser::ABI_FP_rounding(AttrType Tag, const uint8_t *Data,
277 uint32_t &Offset) {
278 static const char *const Strings[] = { "IEEE-754", "Runtime" };
279
280 uint64_t Value = ParseInteger(Data, Offset);
281 StringRef ValueDesc =
282 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
283 PrintAttribute(Tag, Value, ValueDesc);
284 }
285
ABI_FP_denormal(AttrType Tag,const uint8_t * Data,uint32_t & Offset)286 void ARMAttributeParser::ABI_FP_denormal(AttrType Tag, const uint8_t *Data,
287 uint32_t &Offset) {
288 static const char *const Strings[] = {
289 "Unsupported", "IEEE-754", "Sign Only"
290 };
291
292 uint64_t Value = ParseInteger(Data, Offset);
293 StringRef ValueDesc =
294 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
295 PrintAttribute(Tag, Value, ValueDesc);
296 }
297
ABI_FP_exceptions(AttrType Tag,const uint8_t * Data,uint32_t & Offset)298 void ARMAttributeParser::ABI_FP_exceptions(AttrType Tag, const uint8_t *Data,
299 uint32_t &Offset) {
300 static const char *const Strings[] = { "Not Permitted", "IEEE-754" };
301
302 uint64_t Value = ParseInteger(Data, Offset);
303 StringRef ValueDesc =
304 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
305 PrintAttribute(Tag, Value, ValueDesc);
306 }
307
ABI_FP_user_exceptions(AttrType Tag,const uint8_t * Data,uint32_t & Offset)308 void ARMAttributeParser::ABI_FP_user_exceptions(AttrType Tag,
309 const uint8_t *Data,
310 uint32_t &Offset) {
311 static const char *const Strings[] = { "Not Permitted", "IEEE-754" };
312
313 uint64_t Value = ParseInteger(Data, Offset);
314 StringRef ValueDesc =
315 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
316 PrintAttribute(Tag, Value, ValueDesc);
317 }
318
ABI_FP_number_model(AttrType Tag,const uint8_t * Data,uint32_t & Offset)319 void ARMAttributeParser::ABI_FP_number_model(AttrType Tag, const uint8_t *Data,
320 uint32_t &Offset) {
321 static const char *const Strings[] = {
322 "Not Permitted", "Finite Only", "RTABI", "IEEE-754"
323 };
324
325 uint64_t Value = ParseInteger(Data, Offset);
326 StringRef ValueDesc =
327 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
328 PrintAttribute(Tag, Value, ValueDesc);
329 }
330
ABI_align_needed(AttrType Tag,const uint8_t * Data,uint32_t & Offset)331 void ARMAttributeParser::ABI_align_needed(AttrType Tag, const uint8_t *Data,
332 uint32_t &Offset) {
333 static const char *const Strings[] = {
334 "Not Permitted", "8-byte alignment", "4-byte alignment", "Reserved"
335 };
336
337 uint64_t Value = ParseInteger(Data, Offset);
338
339 std::string Description;
340 if (Value < array_lengthof(Strings))
341 Description = std::string(Strings[Value]);
342 else if (Value <= 12)
343 Description = std::string("8-byte alignment, ") + utostr(1 << Value)
344 + std::string("-byte extended alignment");
345 else
346 Description = "Invalid";
347
348 PrintAttribute(Tag, Value, Description);
349 }
350
ABI_align_preserved(AttrType Tag,const uint8_t * Data,uint32_t & Offset)351 void ARMAttributeParser::ABI_align_preserved(AttrType Tag, const uint8_t *Data,
352 uint32_t &Offset) {
353 static const char *const Strings[] = {
354 "Not Required", "8-byte data alignment", "8-byte data and code alignment",
355 "Reserved"
356 };
357
358 uint64_t Value = ParseInteger(Data, Offset);
359
360 std::string Description;
361 if (Value < array_lengthof(Strings))
362 Description = std::string(Strings[Value]);
363 else if (Value <= 12)
364 Description = std::string("8-byte stack alignment, ") + utostr(1 << Value)
365 + std::string("-byte data alignment");
366 else
367 Description = "Invalid";
368
369 PrintAttribute(Tag, Value, Description);
370 }
371
ABI_enum_size(AttrType Tag,const uint8_t * Data,uint32_t & Offset)372 void ARMAttributeParser::ABI_enum_size(AttrType Tag, const uint8_t *Data,
373 uint32_t &Offset) {
374 static const char *const Strings[] = {
375 "Not Permitted", "Packed", "Int32", "External Int32"
376 };
377
378 uint64_t Value = ParseInteger(Data, Offset);
379 StringRef ValueDesc =
380 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
381 PrintAttribute(Tag, Value, ValueDesc);
382 }
383
ABI_HardFP_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)384 void ARMAttributeParser::ABI_HardFP_use(AttrType Tag, const uint8_t *Data,
385 uint32_t &Offset) {
386 static const char *const Strings[] = {
387 "Tag_FP_arch", "Single-Precision", "Reserved", "Tag_FP_arch (deprecated)"
388 };
389
390 uint64_t Value = ParseInteger(Data, Offset);
391 StringRef ValueDesc =
392 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
393 PrintAttribute(Tag, Value, ValueDesc);
394 }
395
ABI_VFP_args(AttrType Tag,const uint8_t * Data,uint32_t & Offset)396 void ARMAttributeParser::ABI_VFP_args(AttrType Tag, const uint8_t *Data,
397 uint32_t &Offset) {
398 static const char *const Strings[] = {
399 "AAPCS", "AAPCS VFP", "Custom", "Not Permitted"
400 };
401
402 uint64_t Value = ParseInteger(Data, Offset);
403 StringRef ValueDesc =
404 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
405 PrintAttribute(Tag, Value, ValueDesc);
406 }
407
ABI_WMMX_args(AttrType Tag,const uint8_t * Data,uint32_t & Offset)408 void ARMAttributeParser::ABI_WMMX_args(AttrType Tag, const uint8_t *Data,
409 uint32_t &Offset) {
410 static const char *const Strings[] = { "AAPCS", "iWMMX", "Custom" };
411
412 uint64_t Value = ParseInteger(Data, Offset);
413 StringRef ValueDesc =
414 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
415 PrintAttribute(Tag, Value, ValueDesc);
416 }
417
ABI_optimization_goals(AttrType Tag,const uint8_t * Data,uint32_t & Offset)418 void ARMAttributeParser::ABI_optimization_goals(AttrType Tag,
419 const uint8_t *Data,
420 uint32_t &Offset) {
421 static const char *const Strings[] = {
422 "None", "Speed", "Aggressive Speed", "Size", "Aggressive Size", "Debugging",
423 "Best Debugging"
424 };
425
426 uint64_t Value = ParseInteger(Data, Offset);
427 StringRef ValueDesc =
428 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
429 PrintAttribute(Tag, Value, ValueDesc);
430 }
431
ABI_FP_optimization_goals(AttrType Tag,const uint8_t * Data,uint32_t & Offset)432 void ARMAttributeParser::ABI_FP_optimization_goals(AttrType Tag,
433 const uint8_t *Data,
434 uint32_t &Offset) {
435 static const char *const Strings[] = {
436 "None", "Speed", "Aggressive Speed", "Size", "Aggressive Size", "Accuracy",
437 "Best Accuracy"
438 };
439
440 uint64_t Value = ParseInteger(Data, Offset);
441 StringRef ValueDesc =
442 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
443 PrintAttribute(Tag, Value, ValueDesc);
444 }
445
compatibility(AttrType Tag,const uint8_t * Data,uint32_t & Offset)446 void ARMAttributeParser::compatibility(AttrType Tag, const uint8_t *Data,
447 uint32_t &Offset) {
448 uint64_t Integer = ParseInteger(Data, Offset);
449 StringRef String = ParseString(Data, Offset);
450
451 DictScope AS(SW, "Attribute");
452 SW.printNumber("Tag", Tag);
453 SW.startLine() << "Value: " << Integer << ", " << String << '\n';
454 SW.printString("TagName", AttrTypeAsString(Tag, /*TagPrefix*/false));
455 switch (Integer) {
456 case 0:
457 SW.printString("Description", StringRef("No Specific Requirements"));
458 break;
459 case 1:
460 SW.printString("Description", StringRef("AEABI Conformant"));
461 break;
462 default:
463 SW.printString("Description", StringRef("AEABI Non-Conformant"));
464 break;
465 }
466 }
467
CPU_unaligned_access(AttrType Tag,const uint8_t * Data,uint32_t & Offset)468 void ARMAttributeParser::CPU_unaligned_access(AttrType Tag, const uint8_t *Data,
469 uint32_t &Offset) {
470 static const char *const Strings[] = { "Not Permitted", "v6-style" };
471
472 uint64_t Value = ParseInteger(Data, Offset);
473 StringRef ValueDesc =
474 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
475 PrintAttribute(Tag, Value, ValueDesc);
476 }
477
FP_HP_extension(AttrType Tag,const uint8_t * Data,uint32_t & Offset)478 void ARMAttributeParser::FP_HP_extension(AttrType Tag, const uint8_t *Data,
479 uint32_t &Offset) {
480 static const char *const Strings[] = { "If Available", "Permitted" };
481
482 uint64_t Value = ParseInteger(Data, Offset);
483 StringRef ValueDesc =
484 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
485 PrintAttribute(Tag, Value, ValueDesc);
486 }
487
ABI_FP_16bit_format(AttrType Tag,const uint8_t * Data,uint32_t & Offset)488 void ARMAttributeParser::ABI_FP_16bit_format(AttrType Tag, const uint8_t *Data,
489 uint32_t &Offset) {
490 static const char *const Strings[] = { "Not Permitted", "IEEE-754", "VFPv3" };
491
492 uint64_t Value = ParseInteger(Data, Offset);
493 StringRef ValueDesc =
494 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
495 PrintAttribute(Tag, Value, ValueDesc);
496 }
497
MPextension_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)498 void ARMAttributeParser::MPextension_use(AttrType Tag, const uint8_t *Data,
499 uint32_t &Offset) {
500 static const char *const Strings[] = { "Not Permitted", "Permitted" };
501
502 uint64_t Value = ParseInteger(Data, Offset);
503 StringRef ValueDesc =
504 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
505 PrintAttribute(Tag, Value, ValueDesc);
506 }
507
DIV_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)508 void ARMAttributeParser::DIV_use(AttrType Tag, const uint8_t *Data,
509 uint32_t &Offset) {
510 static const char *const Strings[] = {
511 "If Available", "Not Permitted", "Permitted"
512 };
513
514 uint64_t Value = ParseInteger(Data, Offset);
515 StringRef ValueDesc =
516 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
517 PrintAttribute(Tag, Value, ValueDesc);
518 }
519
T2EE_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)520 void ARMAttributeParser::T2EE_use(AttrType Tag, const uint8_t *Data,
521 uint32_t &Offset) {
522 static const char *const Strings[] = { "Not Permitted", "Permitted" };
523
524 uint64_t Value = ParseInteger(Data, Offset);
525 StringRef ValueDesc =
526 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
527 PrintAttribute(Tag, Value, ValueDesc);
528 }
529
Virtualization_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)530 void ARMAttributeParser::Virtualization_use(AttrType Tag, const uint8_t *Data,
531 uint32_t &Offset) {
532 static const char *const Strings[] = {
533 "Not Permitted", "TrustZone", "Virtualization Extensions",
534 "TrustZone + Virtualization Extensions"
535 };
536
537 uint64_t Value = ParseInteger(Data, Offset);
538 StringRef ValueDesc =
539 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
540 PrintAttribute(Tag, Value, ValueDesc);
541 }
542
nodefaults(AttrType Tag,const uint8_t * Data,uint32_t & Offset)543 void ARMAttributeParser::nodefaults(AttrType Tag, const uint8_t *Data,
544 uint32_t &Offset) {
545 uint64_t Value = ParseInteger(Data, Offset);
546 PrintAttribute(Tag, Value, "Unspecified Tags UNDEFINED");
547 }
548
ParseIndexList(const uint8_t * Data,uint32_t & Offset,SmallVectorImpl<uint8_t> & IndexList)549 void ARMAttributeParser::ParseIndexList(const uint8_t *Data, uint32_t &Offset,
550 SmallVectorImpl<uint8_t> &IndexList) {
551 for (;;) {
552 unsigned Length;
553 uint64_t Value = decodeULEB128(Data + Offset, &Length);
554 Offset = Offset + Length;
555 if (Value == 0)
556 break;
557 IndexList.push_back(Value);
558 }
559 }
560
ParseAttributeList(const uint8_t * Data,uint32_t & Offset,uint32_t Length)561 void ARMAttributeParser::ParseAttributeList(const uint8_t *Data,
562 uint32_t &Offset, uint32_t Length) {
563 while (Offset < Length) {
564 unsigned Length;
565 uint64_t Tag = decodeULEB128(Data + Offset, &Length);
566 Offset += Length;
567
568 bool Handled = false;
569 for (unsigned AHI = 0, AHE = array_lengthof(DisplayRoutines);
570 AHI != AHE && !Handled; ++AHI) {
571 if (DisplayRoutines[AHI].Attribute == Tag) {
572 (this->*DisplayRoutines[AHI].Routine)(ARMBuildAttrs::AttrType(Tag),
573 Data, Offset);
574 Handled = true;
575 break;
576 }
577 }
578 if (!Handled) {
579 if (Tag < 32) {
580 errs() << "unhandled AEABI Tag " << Tag
581 << " (" << ARMBuildAttrs::AttrTypeAsString(Tag) << ")\n";
582 continue;
583 }
584
585 if (Tag % 2 == 0)
586 IntegerAttribute(ARMBuildAttrs::AttrType(Tag), Data, Offset);
587 else
588 StringAttribute(ARMBuildAttrs::AttrType(Tag), Data, Offset);
589 }
590 }
591 }
592
ParseSubsection(const uint8_t * Data,uint32_t Length)593 void ARMAttributeParser::ParseSubsection(const uint8_t *Data, uint32_t Length) {
594 uint32_t Offset = sizeof(uint32_t); /* SectionLength */
595
596 SW.printNumber("SectionLength", Length);
597
598 const char *VendorName = reinterpret_cast<const char*>(Data + Offset);
599 size_t VendorNameLength = std::strlen(VendorName);
600 SW.printString("Vendor", StringRef(VendorName, VendorNameLength));
601 Offset = Offset + VendorNameLength + 1;
602
603 if (StringRef(VendorName, VendorNameLength).lower() != "aeabi")
604 return;
605
606 while (Offset < Length) {
607 /// Tag_File | Tag_Section | Tag_Symbol uleb128:byte-size
608 uint8_t Tag = Data[Offset];
609 SW.printEnum("Tag", Tag, makeArrayRef(TagNames));
610 Offset = Offset + sizeof(Tag);
611
612 uint32_t Size =
613 *reinterpret_cast<const support::ulittle32_t*>(Data + Offset);
614 SW.printNumber("Size", Size);
615 Offset = Offset + sizeof(Size);
616
617 if (Size > Length) {
618 errs() << "subsection length greater than section length\n";
619 return;
620 }
621
622 StringRef ScopeName, IndexName;
623 SmallVector<uint8_t, 8> Indicies;
624 switch (Tag) {
625 case ARMBuildAttrs::File:
626 ScopeName = "FileAttributes";
627 break;
628 case ARMBuildAttrs::Section:
629 ScopeName = "SectionAttributes";
630 IndexName = "Sections";
631 ParseIndexList(Data, Offset, Indicies);
632 break;
633 case ARMBuildAttrs::Symbol:
634 ScopeName = "SymbolAttributes";
635 IndexName = "Symbols";
636 ParseIndexList(Data, Offset, Indicies);
637 break;
638 default:
639 errs() << "unrecognised tag: 0x" << utohexstr(Tag) << '\n';
640 return;
641 }
642
643 DictScope ASS(SW, ScopeName);
644
645 if (!Indicies.empty())
646 SW.printList(IndexName, Indicies);
647
648 ParseAttributeList(Data, Offset, Length);
649 }
650 }
651
Parse(ArrayRef<uint8_t> Section)652 void ARMAttributeParser::Parse(ArrayRef<uint8_t> Section) {
653 size_t Offset = 1;
654 unsigned SectionNumber = 0;
655
656 while (Offset < Section.size()) {
657 uint32_t SectionLength =
658 *reinterpret_cast<const support::ulittle32_t*>(Section.data() + Offset);
659
660 SW.startLine() << "Section " << ++SectionNumber << " {\n";
661 SW.indent();
662
663 ParseSubsection(Section.data() + Offset, SectionLength);
664 Offset = Offset + SectionLength;
665
666 SW.unindent();
667 SW.startLine() << "}\n";
668 }
669 }
670 }
671
672