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 *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 *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 *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 *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 *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 *Strings[] = {
196 "Not Permitted", "NEONv1", "NEONv2+FMA", "ARMv8-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 *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 *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 *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 *Strings[] = { "Absolute", "PC-relative", "Not Permitted" };
243
244 uint64_t Value = ParseInteger(Data, Offset);
245 StringRef ValueDesc =
246 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
247 PrintAttribute(Tag, Value, ValueDesc);
248 }
249
ABI_PCS_GOT_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)250 void ARMAttributeParser::ABI_PCS_GOT_use(AttrType Tag, const uint8_t *Data,
251 uint32_t &Offset) {
252 static const char *Strings[] = { "Not Permitted", "Direct", "GOT-Indirect" };
253
254 uint64_t Value = ParseInteger(Data, Offset);
255 StringRef ValueDesc =
256 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
257 PrintAttribute(Tag, Value, ValueDesc);
258 }
259
ABI_PCS_wchar_t(AttrType Tag,const uint8_t * Data,uint32_t & Offset)260 void ARMAttributeParser::ABI_PCS_wchar_t(AttrType Tag, const uint8_t *Data,
261 uint32_t &Offset) {
262 static const char *Strings[] = {
263 "Not Permitted", "Unknown", "2-byte", "Unknown", "4-byte"
264 };
265
266 uint64_t Value = ParseInteger(Data, Offset);
267 StringRef ValueDesc =
268 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
269 PrintAttribute(Tag, Value, ValueDesc);
270 }
271
ABI_FP_rounding(AttrType Tag,const uint8_t * Data,uint32_t & Offset)272 void ARMAttributeParser::ABI_FP_rounding(AttrType Tag, const uint8_t *Data,
273 uint32_t &Offset) {
274 static const char *Strings[] = { "IEEE-754", "Runtime" };
275
276 uint64_t Value = ParseInteger(Data, Offset);
277 StringRef ValueDesc =
278 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
279 PrintAttribute(Tag, Value, ValueDesc);
280 }
281
ABI_FP_denormal(AttrType Tag,const uint8_t * Data,uint32_t & Offset)282 void ARMAttributeParser::ABI_FP_denormal(AttrType Tag, const uint8_t *Data,
283 uint32_t &Offset) {
284 static const char *Strings[] = { "Unsupported", "IEEE-754", "Sign Only" };
285
286 uint64_t Value = ParseInteger(Data, Offset);
287 StringRef ValueDesc =
288 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
289 PrintAttribute(Tag, Value, ValueDesc);
290 }
291
ABI_FP_exceptions(AttrType Tag,const uint8_t * Data,uint32_t & Offset)292 void ARMAttributeParser::ABI_FP_exceptions(AttrType Tag, const uint8_t *Data,
293 uint32_t &Offset) {
294 static const char *Strings[] = { "Not Permitted", "IEEE-754" };
295
296 uint64_t Value = ParseInteger(Data, Offset);
297 StringRef ValueDesc =
298 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
299 PrintAttribute(Tag, Value, ValueDesc);
300 }
301
ABI_FP_user_exceptions(AttrType Tag,const uint8_t * Data,uint32_t & Offset)302 void ARMAttributeParser::ABI_FP_user_exceptions(AttrType Tag,
303 const uint8_t *Data,
304 uint32_t &Offset) {
305 static const char *Strings[] = { "Not Permitted", "IEEE-754" };
306
307 uint64_t Value = ParseInteger(Data, Offset);
308 StringRef ValueDesc =
309 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
310 PrintAttribute(Tag, Value, ValueDesc);
311 }
312
ABI_FP_number_model(AttrType Tag,const uint8_t * Data,uint32_t & Offset)313 void ARMAttributeParser::ABI_FP_number_model(AttrType Tag, const uint8_t *Data,
314 uint32_t &Offset) {
315 static const char *Strings[] = {
316 "Not Permitted", "Finite Only", "RTABI", "IEEE-754"
317 };
318
319 uint64_t Value = ParseInteger(Data, Offset);
320 StringRef ValueDesc =
321 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
322 PrintAttribute(Tag, Value, ValueDesc);
323 }
324
ABI_align_needed(AttrType Tag,const uint8_t * Data,uint32_t & Offset)325 void ARMAttributeParser::ABI_align_needed(AttrType Tag, const uint8_t *Data,
326 uint32_t &Offset) {
327 static const char *Strings[] = {
328 "Not Permitted", "8-byte alignment", "4-byte alignment", "Reserved"
329 };
330
331 uint64_t Value = ParseInteger(Data, Offset);
332
333 std::string Description;
334 if (Value < array_lengthof(Strings))
335 Description = std::string(Strings[Value]);
336 else if (Value <= 12)
337 Description = std::string("8-byte alignment, ") + utostr(1 << Value)
338 + std::string("-byte extended alignment");
339 else
340 Description = "Invalid";
341
342 PrintAttribute(Tag, Value, Description);
343 }
344
ABI_align_preserved(AttrType Tag,const uint8_t * Data,uint32_t & Offset)345 void ARMAttributeParser::ABI_align_preserved(AttrType Tag, const uint8_t *Data,
346 uint32_t &Offset) {
347 static const char *Strings[] = {
348 "Not Required", "8-byte data alignment", "8-byte data and code alignment",
349 "Reserved"
350 };
351
352 uint64_t Value = ParseInteger(Data, Offset);
353
354 std::string Description;
355 if (Value < array_lengthof(Strings))
356 Description = std::string(Strings[Value]);
357 else if (Value <= 12)
358 Description = std::string("8-byte stack alignment, ") + utostr(1 << Value)
359 + std::string("-byte data alignment");
360 else
361 Description = "Invalid";
362
363 PrintAttribute(Tag, Value, Description);
364 }
365
ABI_enum_size(AttrType Tag,const uint8_t * Data,uint32_t & Offset)366 void ARMAttributeParser::ABI_enum_size(AttrType Tag, const uint8_t *Data,
367 uint32_t &Offset) {
368 static const char *Strings[] = {
369 "Not Permitted", "Packed", "Int32", "External Int32"
370 };
371
372 uint64_t Value = ParseInteger(Data, Offset);
373 StringRef ValueDesc =
374 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
375 PrintAttribute(Tag, Value, ValueDesc);
376 }
377
ABI_HardFP_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)378 void ARMAttributeParser::ABI_HardFP_use(AttrType Tag, const uint8_t *Data,
379 uint32_t &Offset) {
380 static const char *Strings[] = {
381 "Tag_FP_arch", "Single-Precision", "Reserved", "Tag_FP_arch (deprecated)"
382 };
383
384 uint64_t Value = ParseInteger(Data, Offset);
385 StringRef ValueDesc =
386 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
387 PrintAttribute(Tag, Value, ValueDesc);
388 }
389
ABI_VFP_args(AttrType Tag,const uint8_t * Data,uint32_t & Offset)390 void ARMAttributeParser::ABI_VFP_args(AttrType Tag, const uint8_t *Data,
391 uint32_t &Offset) {
392 static const char *Strings[] = {
393 "AAPCS", "AAPCS VFP", "Custom", "Not Permitted"
394 };
395
396 uint64_t Value = ParseInteger(Data, Offset);
397 StringRef ValueDesc =
398 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
399 PrintAttribute(Tag, Value, ValueDesc);
400 }
401
ABI_WMMX_args(AttrType Tag,const uint8_t * Data,uint32_t & Offset)402 void ARMAttributeParser::ABI_WMMX_args(AttrType Tag, const uint8_t *Data,
403 uint32_t &Offset) {
404 static const char *Strings[] = { "AAPCS", "iWMMX", "Custom" };
405
406 uint64_t Value = ParseInteger(Data, Offset);
407 StringRef ValueDesc =
408 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
409 PrintAttribute(Tag, Value, ValueDesc);
410 }
411
ABI_optimization_goals(AttrType Tag,const uint8_t * Data,uint32_t & Offset)412 void ARMAttributeParser::ABI_optimization_goals(AttrType Tag,
413 const uint8_t *Data,
414 uint32_t &Offset) {
415 static const char *Strings[] = {
416 "None", "Speed", "Aggressive Speed", "Size", "Aggressive Size", "Debugging",
417 "Best Debugging"
418 };
419
420 uint64_t Value = ParseInteger(Data, Offset);
421 StringRef ValueDesc =
422 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
423 PrintAttribute(Tag, Value, ValueDesc);
424 }
425
ABI_FP_optimization_goals(AttrType Tag,const uint8_t * Data,uint32_t & Offset)426 void ARMAttributeParser::ABI_FP_optimization_goals(AttrType Tag,
427 const uint8_t *Data,
428 uint32_t &Offset) {
429 static const char *Strings[] = {
430 "None", "Speed", "Aggressive Speed", "Size", "Aggressive Size", "Accuracy",
431 "Best Accuracy"
432 };
433
434 uint64_t Value = ParseInteger(Data, Offset);
435 StringRef ValueDesc =
436 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
437 PrintAttribute(Tag, Value, ValueDesc);
438 }
439
compatibility(AttrType Tag,const uint8_t * Data,uint32_t & Offset)440 void ARMAttributeParser::compatibility(AttrType Tag, const uint8_t *Data,
441 uint32_t &Offset) {
442 uint64_t Integer = ParseInteger(Data, Offset);
443 StringRef String = ParseString(Data, Offset);
444
445 DictScope AS(SW, "Attribute");
446 SW.printNumber("Tag", Tag);
447 SW.startLine() << "Value: " << Integer << ", " << String << '\n';
448 SW.printString("TagName", AttrTypeAsString(Tag, /*TagPrefix*/false));
449 switch (Integer) {
450 case 0:
451 SW.printString("Description", StringRef("No Specific Requirements"));
452 break;
453 case 1:
454 SW.printString("Description", StringRef("AEABI Conformant"));
455 break;
456 default:
457 SW.printString("Description", StringRef("AEABI Non-Conformant"));
458 break;
459 }
460 }
461
CPU_unaligned_access(AttrType Tag,const uint8_t * Data,uint32_t & Offset)462 void ARMAttributeParser::CPU_unaligned_access(AttrType Tag, const uint8_t *Data,
463 uint32_t &Offset) {
464 static const char *Strings[] = { "Not Permitted", "v6-style" };
465
466 uint64_t Value = ParseInteger(Data, Offset);
467 StringRef ValueDesc =
468 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
469 PrintAttribute(Tag, Value, ValueDesc);
470 }
471
FP_HP_extension(AttrType Tag,const uint8_t * Data,uint32_t & Offset)472 void ARMAttributeParser::FP_HP_extension(AttrType Tag, const uint8_t *Data,
473 uint32_t &Offset) {
474 static const char *Strings[] = { "If Available", "Permitted" };
475
476 uint64_t Value = ParseInteger(Data, Offset);
477 StringRef ValueDesc =
478 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
479 PrintAttribute(Tag, Value, ValueDesc);
480 }
481
ABI_FP_16bit_format(AttrType Tag,const uint8_t * Data,uint32_t & Offset)482 void ARMAttributeParser::ABI_FP_16bit_format(AttrType Tag, const uint8_t *Data,
483 uint32_t &Offset) {
484 static const char *Strings[] = { "Not Permitted", "IEEE-754", "VFPv3" };
485
486 uint64_t Value = ParseInteger(Data, Offset);
487 StringRef ValueDesc =
488 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
489 PrintAttribute(Tag, Value, ValueDesc);
490 }
491
MPextension_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)492 void ARMAttributeParser::MPextension_use(AttrType Tag, const uint8_t *Data,
493 uint32_t &Offset) {
494 static const char *Strings[] = { "Not Permitted", "Permitted" };
495
496 uint64_t Value = ParseInteger(Data, Offset);
497 StringRef ValueDesc =
498 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
499 PrintAttribute(Tag, Value, ValueDesc);
500 }
501
DIV_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)502 void ARMAttributeParser::DIV_use(AttrType Tag, const uint8_t *Data,
503 uint32_t &Offset) {
504 static const char *Strings[] = {
505 "If Available", "Not Permitted", "Permitted"
506 };
507
508 uint64_t Value = ParseInteger(Data, Offset);
509 StringRef ValueDesc =
510 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
511 PrintAttribute(Tag, Value, ValueDesc);
512 }
513
T2EE_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)514 void ARMAttributeParser::T2EE_use(AttrType Tag, const uint8_t *Data,
515 uint32_t &Offset) {
516 static const char *Strings[] = { "Not Permitted", "Permitted" };
517
518 uint64_t Value = ParseInteger(Data, Offset);
519 StringRef ValueDesc =
520 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
521 PrintAttribute(Tag, Value, ValueDesc);
522 }
523
Virtualization_use(AttrType Tag,const uint8_t * Data,uint32_t & Offset)524 void ARMAttributeParser::Virtualization_use(AttrType Tag, const uint8_t *Data,
525 uint32_t &Offset) {
526 static const char *Strings[] = {
527 "Not Permitted", "TrustZone", "Virtualization Extensions",
528 "TrustZone + Virtualization Extensions"
529 };
530
531 uint64_t Value = ParseInteger(Data, Offset);
532 StringRef ValueDesc =
533 (Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
534 PrintAttribute(Tag, Value, ValueDesc);
535 }
536
nodefaults(AttrType Tag,const uint8_t * Data,uint32_t & Offset)537 void ARMAttributeParser::nodefaults(AttrType Tag, const uint8_t *Data,
538 uint32_t &Offset) {
539 uint64_t Value = ParseInteger(Data, Offset);
540 PrintAttribute(Tag, Value, "Unspecified Tags UNDEFINED");
541 }
542
ParseIndexList(const uint8_t * Data,uint32_t & Offset,SmallVectorImpl<uint8_t> & IndexList)543 void ARMAttributeParser::ParseIndexList(const uint8_t *Data, uint32_t &Offset,
544 SmallVectorImpl<uint8_t> &IndexList) {
545 for (;;) {
546 unsigned Length;
547 uint64_t Value = decodeULEB128(Data + Offset, &Length);
548 Offset = Offset + Length;
549 if (Value == 0)
550 break;
551 IndexList.push_back(Value);
552 }
553 }
554
ParseAttributeList(const uint8_t * Data,uint32_t & Offset,uint32_t Length)555 void ARMAttributeParser::ParseAttributeList(const uint8_t *Data,
556 uint32_t &Offset, uint32_t Length) {
557 while (Offset < Length) {
558 unsigned Length;
559 uint64_t Tag = decodeULEB128(Data + Offset, &Length);
560 Offset += Length;
561
562 bool Handled = false;
563 for (unsigned AHI = 0, AHE = array_lengthof(DisplayRoutines);
564 AHI != AHE && !Handled; ++AHI) {
565 if (DisplayRoutines[AHI].Attribute == Tag) {
566 (this->*DisplayRoutines[AHI].Routine)(ARMBuildAttrs::AttrType(Tag),
567 Data, Offset);
568 Handled = true;
569 break;
570 }
571 }
572 if (!Handled) {
573 if (Tag < 32) {
574 errs() << "unhandled AEABI Tag " << Tag
575 << " (" << ARMBuildAttrs::AttrTypeAsString(Tag) << ")\n";
576 continue;
577 }
578
579 if (Tag % 2 == 0)
580 IntegerAttribute(ARMBuildAttrs::AttrType(Tag), Data, Offset);
581 else
582 StringAttribute(ARMBuildAttrs::AttrType(Tag), Data, Offset);
583 }
584 }
585 }
586
ParseSubsection(const uint8_t * Data,uint32_t Length)587 void ARMAttributeParser::ParseSubsection(const uint8_t *Data, uint32_t Length) {
588 uint32_t Offset = sizeof(uint32_t); /* SectionLength */
589
590 SW.printNumber("SectionLength", Length);
591
592 const char *VendorName = reinterpret_cast<const char*>(Data + Offset);
593 size_t VendorNameLength = std::strlen(VendorName);
594 SW.printString("Vendor", StringRef(VendorName, VendorNameLength));
595 Offset = Offset + VendorNameLength + 1;
596
597 if (StringRef(VendorName, VendorNameLength).lower() != "aeabi")
598 return;
599
600 while (Offset < Length) {
601 /// Tag_File | Tag_Section | Tag_Symbol uleb128:byte-size
602 uint8_t Tag = Data[Offset];
603 SW.printEnum("Tag", Tag, makeArrayRef(TagNames));
604 Offset = Offset + sizeof(Tag);
605
606 uint32_t Size =
607 *reinterpret_cast<const support::ulittle32_t*>(Data + Offset);
608 SW.printNumber("Size", Size);
609 Offset = Offset + sizeof(Size);
610
611 if (Size > Length) {
612 errs() << "subsection length greater than section length\n";
613 return;
614 }
615
616 StringRef ScopeName, IndexName;
617 SmallVector<uint8_t, 8> Indicies;
618 switch (Tag) {
619 case ARMBuildAttrs::File:
620 ScopeName = "FileAttributes";
621 break;
622 case ARMBuildAttrs::Section:
623 ScopeName = "SectionAttributes";
624 IndexName = "Sections";
625 ParseIndexList(Data, Offset, Indicies);
626 break;
627 case ARMBuildAttrs::Symbol:
628 ScopeName = "SymbolAttributes";
629 IndexName = "Symbols";
630 ParseIndexList(Data, Offset, Indicies);
631 break;
632 default:
633 errs() << "unrecognised tag: 0x" << utohexstr(Tag) << '\n';
634 return;
635 }
636
637 DictScope ASS(SW, ScopeName);
638
639 if (!Indicies.empty())
640 SW.printList(IndexName, Indicies);
641
642 ParseAttributeList(Data, Offset, Length);
643 }
644 }
645
Parse(ArrayRef<uint8_t> Section)646 void ARMAttributeParser::Parse(ArrayRef<uint8_t> Section) {
647 size_t Offset = 1;
648 unsigned SectionNumber = 0;
649
650 while (Offset < Section.size()) {
651 uint32_t SectionLength =
652 *reinterpret_cast<const support::ulittle32_t*>(Section.data() + Offset);
653
654 SW.startLine() << "Section " << ++SectionNumber << " {\n";
655 SW.indent();
656
657 ParseSubsection(Section.data() + Offset, SectionLength);
658 Offset = Offset + SectionLength;
659
660 SW.unindent();
661 SW.startLine() << "}\n";
662 }
663 }
664 }
665
666