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[ARM] sext of a load is free
[llvm-core.git] / tools / llvm-readobj / ARMWinEHPrinter.cpp
blob4de14e2e78d5265a147d448cc31412b288d9de60
1 //===-- ARMWinEHPrinter.cpp - Windows on ARM EH Data Printer ----*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // Windows on ARM uses a series of serialised data structures (RuntimeFunction)
10 // to create a table of information for unwinding. In order to conserve space,
11 // there are two different ways that this data is represented.
12 //
13 // For functions with canonical forms for the prologue and epilogue, the data
14 // can be stored in a "packed" form. In this case, the data is packed into the
15 // RuntimeFunction's remaining 30-bits and can fully describe the entire frame.
16 //
17 // +---------------------------------------+
18 // | Function Entry Address |
19 // +---------------------------------------+
20 // | Packed Form Data |
21 // +---------------------------------------+
22 //
23 // This layout is parsed by Decoder::dumpPackedEntry. No unwind bytecode is
24 // associated with such a frame as they can be derived from the provided data.
25 // The decoder does not synthesize this data as it is unnecessary for the
26 // purposes of validation, with the synthesis being required only by a proper
27 // unwinder.
28 //
29 // For functions that are large or do not match canonical forms, the data is
30 // split up into two portions, with the actual data residing in the "exception
31 // data" table (.xdata) with a reference to the entry from the "procedure data"
32 // (.pdata) entry.
33 //
34 // The exception data contains information about the frame setup, all of the
35 // epilogue scopes (for functions for which there are multiple exit points) and
36 // the associated exception handler. Additionally, the entry contains byte-code
37 // describing how to unwind the function (c.f. Decoder::decodeOpcodes).
38 //
39 // +---------------------------------------+
40 // | Function Entry Address |
41 // +---------------------------------------+
42 // | Exception Data Entry Address |
43 // +---------------------------------------+
44 //
45 // This layout is parsed by Decoder::dumpUnpackedEntry. Such an entry must
46 // first resolve the exception data entry address. This structure
47 // (ExceptionDataRecord) has a variable sized header
48 // (c.f. ARM::WinEH::HeaderWords) and encodes most of the same information as
49 // the packed form. However, because this information is insufficient to
50 // synthesize the unwinding, there are associated unwinding bytecode which make
51 // up the bulk of the Decoder.
52 //
53 // The decoder itself is table-driven, using the first byte to determine the
54 // opcode and dispatching to the associated printing routine. The bytecode
55 // itself is a variable length instruction encoding that can fully describe the
56 // state of the stack and the necessary operations for unwinding to the
57 // beginning of the frame.
58 //
59 // The byte-code maintains a 1-1 instruction mapping, indicating both the width
60 // of the instruction (Thumb2 instructions are variable length, 16 or 32 bits
61 // wide) allowing the program to unwind from any point in the prologue, body, or
62 // epilogue of the function.
63
64 #include "ARMWinEHPrinter.h"
65 #include "Error.h"
66 #include "llvm/ADT/STLExtras.h"
67 #include "llvm/ADT/StringExtras.h"
68 #include "llvm/Support/ARMWinEH.h"
69 #include "llvm/Support/Format.h"
70
71 using namespace llvm;
72 using namespace llvm::object;
73 using namespace llvm::support;
74
75 namespace llvm {
76 raw_ostream &operator<<(raw_ostream &OS, const ARM::WinEH::ReturnType &RT) {
77 switch (RT) {
78 case ARM::WinEH::ReturnType::RT_POP:
79 OS << "pop {pc}";
80 break;
81 case ARM::WinEH::ReturnType::RT_B:
82 OS << "b target";
83 break;
84 case ARM::WinEH::ReturnType::RT_BW:
85 OS << "b.w target";
86 break;
87 case ARM::WinEH::ReturnType::RT_NoEpilogue:
88 OS << "(no epilogue)";
89 break;
90 }
91 return OS;
92 }
93 }
94
95 static std::string formatSymbol(StringRef Name, uint64_t Address,
96 uint64_t Offset = 0) {
97 std::string Buffer;
98 raw_string_ostream OS(Buffer);
99
100 if (!Name.empty())
101 OS << Name << " ";
102
103 if (Offset)
104 OS << format("+0x%X (0x%" PRIX64 ")", Offset, Address);
105 else if (!Name.empty())
106 OS << format("(0x%" PRIX64 ")", Address);
107 else
108 OS << format("0x%" PRIX64, Address);
109
110 return OS.str();
111 }
112
113 namespace llvm {
114 namespace ARM {
115 namespace WinEH {
116 const size_t Decoder::PDataEntrySize = sizeof(RuntimeFunction);
117
118 // TODO name the uops more appropriately
119 const Decoder::RingEntry Decoder::Ring[] = {
120 { 0x80, 0x00, 1, &Decoder::opcode_0xxxxxxx }, // UOP_STACK_FREE (16-bit)
121 { 0xc0, 0x80, 2, &Decoder::opcode_10Lxxxxx }, // UOP_POP (32-bit)
122 { 0xf0, 0xc0, 1, &Decoder::opcode_1100xxxx }, // UOP_STACK_SAVE (16-bit)
123 { 0xf8, 0xd0, 1, &Decoder::opcode_11010Lxx }, // UOP_POP (16-bit)
124 { 0xf8, 0xd8, 1, &Decoder::opcode_11011Lxx }, // UOP_POP (32-bit)
125 { 0xf8, 0xe0, 1, &Decoder::opcode_11100xxx }, // UOP_VPOP (32-bit)
126 { 0xfc, 0xe8, 2, &Decoder::opcode_111010xx }, // UOP_STACK_FREE (32-bit)
127 { 0xfe, 0xec, 2, &Decoder::opcode_1110110L }, // UOP_POP (16-bit)
128 { 0xff, 0xee, 2, &Decoder::opcode_11101110 }, // UOP_MICROSOFT_SPECIFIC (16-bit)
129 // UOP_PUSH_MACHINE_FRAME
130 // UOP_PUSH_CONTEXT
131 // UOP_PUSH_TRAP_FRAME
132 // UOP_REDZONE_RESTORE_LR
133 { 0xff, 0xef, 2, &Decoder::opcode_11101111 }, // UOP_LDRPC_POSTINC (32-bit)
134 { 0xff, 0xf5, 2, &Decoder::opcode_11110101 }, // UOP_VPOP (32-bit)
135 { 0xff, 0xf6, 2, &Decoder::opcode_11110110 }, // UOP_VPOP (32-bit)
136 { 0xff, 0xf7, 3, &Decoder::opcode_11110111 }, // UOP_STACK_RESTORE (16-bit)
137 { 0xff, 0xf8, 4, &Decoder::opcode_11111000 }, // UOP_STACK_RESTORE (16-bit)
138 { 0xff, 0xf9, 3, &Decoder::opcode_11111001 }, // UOP_STACK_RESTORE (32-bit)
139 { 0xff, 0xfa, 4, &Decoder::opcode_11111010 }, // UOP_STACK_RESTORE (32-bit)
140 { 0xff, 0xfb, 1, &Decoder::opcode_11111011 }, // UOP_NOP (16-bit)
141 { 0xff, 0xfc, 1, &Decoder::opcode_11111100 }, // UOP_NOP (32-bit)
142 { 0xff, 0xfd, 1, &Decoder::opcode_11111101 }, // UOP_NOP (16-bit) / END
143 { 0xff, 0xfe, 1, &Decoder::opcode_11111110 }, // UOP_NOP (32-bit) / END
144 { 0xff, 0xff, 1, &Decoder::opcode_11111111 }, // UOP_END
145 };
146
147
148 // Unwind opcodes for ARM64.
149 // https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling
150 const Decoder::RingEntry Decoder::Ring64[] = {
151 { 0xe0, 0x00, 1, &Decoder::opcode_alloc_s },
152 { 0xe0, 0x20, 1, &Decoder::opcode_save_r19r20_x },
153 { 0xc0, 0x40, 1, &Decoder::opcode_save_fplr },
154 { 0xc0, 0x80, 1, &Decoder::opcode_save_fplr_x },
155 { 0xf8, 0xc0, 2, &Decoder::opcode_alloc_m },
156 { 0xfc, 0xc8, 2, &Decoder::opcode_save_regp },
157 { 0xfc, 0xcc, 2, &Decoder::opcode_save_regp_x },
158 { 0xfc, 0xd0, 2, &Decoder::opcode_save_reg },
159 { 0xfe, 0xd4, 2, &Decoder::opcode_save_reg_x },
160 { 0xfe, 0xd6, 2, &Decoder::opcode_save_lrpair },
161 { 0xfe, 0xd8, 2, &Decoder::opcode_save_fregp },
162 { 0xfe, 0xda, 2, &Decoder::opcode_save_fregp_x },
163 { 0xfe, 0xdc, 2, &Decoder::opcode_save_freg },
164 { 0xff, 0xde, 2, &Decoder::opcode_save_freg_x },
165 { 0xff, 0xe0, 4, &Decoder::opcode_alloc_l },
166 { 0xff, 0xe1, 1, &Decoder::opcode_setfp },
167 { 0xff, 0xe2, 2, &Decoder::opcode_addfp },
168 { 0xff, 0xe3, 1, &Decoder::opcode_nop },
169 { 0xff, 0xe4, 1, &Decoder::opcode_end },
170 { 0xff, 0xe5, 1, &Decoder::opcode_end_c },
171 };
172
173 void Decoder::printRegisters(const std::pair<uint16_t, uint32_t> &RegisterMask) {
174 static const char * const GPRRegisterNames[16] = {
175 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
176 "r11", "ip", "sp", "lr", "pc",
177 };
178
179 const uint16_t GPRMask = std::get<0>(RegisterMask);
180 const uint16_t VFPMask = std::get<1>(RegisterMask);
181
182 OS << '{';
183 bool Comma = false;
184 for (unsigned RI = 0, RE = 11; RI < RE; ++RI) {
185 if (GPRMask & (1 << RI)) {
186 if (Comma)
187 OS << ", ";
188 OS << GPRRegisterNames[RI];
189 Comma = true;
190 }
191 }
192 for (unsigned RI = 0, RE = 32; RI < RE; ++RI) {
193 if (VFPMask & (1 << RI)) {
194 if (Comma)
195 OS << ", ";
196 OS << "d" << unsigned(RI);
197 Comma = true;
198 }
199 }
200 for (unsigned RI = 11, RE = 16; RI < RE; ++RI) {
201 if (GPRMask & (1 << RI)) {
202 if (Comma)
203 OS << ", ";
204 OS << GPRRegisterNames[RI];
205 Comma = true;
206 }
207 }
208 OS << '}';
209 }
210
211 ErrorOr<object::SectionRef>
212 Decoder::getSectionContaining(const COFFObjectFile &COFF, uint64_t VA) {
213 for (const auto &Section : COFF.sections()) {
214 uint64_t Address = Section.getAddress();
215 uint64_t Size = Section.getSize();
216
217 if (VA >= Address && (VA - Address) <= Size)
218 return Section;
219 }
220 return readobj_error::unknown_symbol;
221 }
222
223 ErrorOr<object::SymbolRef> Decoder::getSymbol(const COFFObjectFile &COFF,
224 uint64_t VA, bool FunctionOnly) {
225 for (const auto &Symbol : COFF.symbols()) {
226 Expected<SymbolRef::Type> Type = Symbol.getType();
227 if (!Type)
228 return errorToErrorCode(Type.takeError());
229 if (FunctionOnly && *Type != SymbolRef::ST_Function)
230 continue;
231
232 Expected<uint64_t> Address = Symbol.getAddress();
233 if (!Address)
234 return errorToErrorCode(Address.takeError());
235 if (*Address == VA)
236 return Symbol;
237 }
238 return readobj_error::unknown_symbol;
239 }
240
241 ErrorOr<SymbolRef> Decoder::getRelocatedSymbol(const COFFObjectFile &,
242 const SectionRef &Section,
243 uint64_t Offset) {
244 for (const auto &Relocation : Section.relocations()) {
245 uint64_t RelocationOffset = Relocation.getOffset();
246 if (RelocationOffset == Offset)
247 return *Relocation.getSymbol();
248 }
249 return readobj_error::unknown_symbol;
250 }
251
252 bool Decoder::opcode_0xxxxxxx(const uint8_t *OC, unsigned &Offset,
253 unsigned Length, bool Prologue) {
254 uint8_t Imm = OC[Offset] & 0x7f;
255 SW.startLine() << format("0x%02x ; %s sp, #(%u * 4)\n",
256 OC[Offset],
257 static_cast<const char *>(Prologue ? "sub" : "add"),
258 Imm);
259 ++Offset;
260 return false;
261 }
262
263 bool Decoder::opcode_10Lxxxxx(const uint8_t *OC, unsigned &Offset,
264 unsigned Length, bool Prologue) {
265 unsigned Link = (OC[Offset] & 0x20) >> 5;
266 uint16_t RegisterMask = (Link << (Prologue ? 14 : 15))
267 | ((OC[Offset + 0] & 0x1f) << 8)
268 | ((OC[Offset + 1] & 0xff) << 0);
269 assert((~RegisterMask & (1 << 13)) && "sp must not be set");
270 assert((~RegisterMask & (1 << (Prologue ? 15 : 14))) && "pc must not be set");
271
272 SW.startLine() << format("0x%02x 0x%02x ; %s.w ",
273 OC[Offset + 0], OC[Offset + 1],
274 Prologue ? "push" : "pop");
275 printRegisters(std::make_pair(RegisterMask, 0));
276 OS << '\n';
277
278 Offset += 2;
279 return false;
280 }
281
282 bool Decoder::opcode_1100xxxx(const uint8_t *OC, unsigned &Offset,
283 unsigned Length, bool Prologue) {
284 if (Prologue)
285 SW.startLine() << format("0x%02x ; mov r%u, sp\n",
286 OC[Offset], OC[Offset] & 0xf);
287 else
288 SW.startLine() << format("0x%02x ; mov sp, r%u\n",
289 OC[Offset], OC[Offset] & 0xf);
290 ++Offset;
291 return false;
292 }
293
294 bool Decoder::opcode_11010Lxx(const uint8_t *OC, unsigned &Offset,
295 unsigned Length, bool Prologue) {
296 unsigned Link = (OC[Offset] & 0x4) >> 3;
297 unsigned Count = (OC[Offset] & 0x3);
298
299 uint16_t GPRMask = (Link << (Prologue ? 14 : 15))
300 | (((1 << (Count + 1)) - 1) << 4);
301
302 SW.startLine() << format("0x%02x ; %s ", OC[Offset],
303 Prologue ? "push" : "pop");
304 printRegisters(std::make_pair(GPRMask, 0));
305 OS << '\n';
306
307 ++Offset;
308 return false;
309 }
310
311 bool Decoder::opcode_11011Lxx(const uint8_t *OC, unsigned &Offset,
312 unsigned Length, bool Prologue) {
313 unsigned Link = (OC[Offset] & 0x4) >> 2;
314 unsigned Count = (OC[Offset] & 0x3) + 4;
315
316 uint16_t GPRMask = (Link << (Prologue ? 14 : 15))
317 | (((1 << (Count + 1)) - 1) << 4);
318
319 SW.startLine() << format("0x%02x ; %s.w ", OC[Offset],
320 Prologue ? "push" : "pop");
321 printRegisters(std::make_pair(GPRMask, 0));
322 OS << '\n';
323
324 ++Offset;
325 return false;
326 }
327
328 bool Decoder::opcode_11100xxx(const uint8_t *OC, unsigned &Offset,
329 unsigned Length, bool Prologue) {
330 unsigned High = (OC[Offset] & 0x7);
331 uint32_t VFPMask = (((1 << (High + 1)) - 1) << 8);
332
333 SW.startLine() << format("0x%02x ; %s ", OC[Offset],
334 Prologue ? "vpush" : "vpop");
335 printRegisters(std::make_pair(0, VFPMask));
336 OS << '\n';
337
338 ++Offset;
339 return false;
340 }
341
342 bool Decoder::opcode_111010xx(const uint8_t *OC, unsigned &Offset,
343 unsigned Length, bool Prologue) {
344 uint16_t Imm = ((OC[Offset + 0] & 0x03) << 8) | ((OC[Offset + 1] & 0xff) << 0);
345
346 SW.startLine() << format("0x%02x 0x%02x ; %s.w sp, #(%u * 4)\n",
347 OC[Offset + 0], OC[Offset + 1],
348 static_cast<const char *>(Prologue ? "sub" : "add"),
349 Imm);
350
351 Offset += 2;
352 return false;
353 }
354
355 bool Decoder::opcode_1110110L(const uint8_t *OC, unsigned &Offset,
356 unsigned Length, bool Prologue) {
357 uint8_t GPRMask = ((OC[Offset + 0] & 0x01) << (Prologue ? 14 : 15))
358 | ((OC[Offset + 1] & 0xff) << 0);
359
360 SW.startLine() << format("0x%02x 0x%02x ; %s ", OC[Offset + 0],
361 OC[Offset + 1], Prologue ? "push" : "pop");
362 printRegisters(std::make_pair(GPRMask, 0));
363 OS << '\n';
364
365 Offset += 2;
366 return false;
367 }
368
369 bool Decoder::opcode_11101110(const uint8_t *OC, unsigned &Offset,
370 unsigned Length, bool Prologue) {
371 assert(!Prologue && "may not be used in prologue");
372
373 if (OC[Offset + 1] & 0xf0)
374 SW.startLine() << format("0x%02x 0x%02x ; reserved\n",
375 OC[Offset + 0], OC[Offset + 1]);
376 else
377 SW.startLine()
378 << format("0x%02x 0x%02x ; microsoft-specific (type: %u)\n",
379 OC[Offset + 0], OC[Offset + 1], OC[Offset + 1] & 0x0f);
380
381 Offset += 2;
382 return false;
383 }
384
385 bool Decoder::opcode_11101111(const uint8_t *OC, unsigned &Offset,
386 unsigned Length, bool Prologue) {
387 assert(!Prologue && "may not be used in prologue");
388
389 if (OC[Offset + 1] & 0xf0)
390 SW.startLine() << format("0x%02x 0x%02x ; reserved\n",
391 OC[Offset + 0], OC[Offset + 1]);
392 else
393 SW.startLine()
394 << format("0x%02x 0x%02x ; ldr.w lr, [sp], #%u\n",
395 OC[Offset + 0], OC[Offset + 1], OC[Offset + 1] << 2);
396
397 Offset += 2;
398 return false;
399 }
400
401 bool Decoder::opcode_11110101(const uint8_t *OC, unsigned &Offset,
402 unsigned Length, bool Prologue) {
403 unsigned Start = (OC[Offset + 1] & 0xf0) >> 4;
404 unsigned End = (OC[Offset + 1] & 0x0f) >> 0;
405 uint32_t VFPMask = ((1 << (End - Start)) - 1) << Start;
406
407 SW.startLine() << format("0x%02x 0x%02x ; %s ", OC[Offset + 0],
408 OC[Offset + 1], Prologue ? "vpush" : "vpop");
409 printRegisters(std::make_pair(0, VFPMask));
410 OS << '\n';
411
412 Offset += 2;
413 return false;
414 }
415
416 bool Decoder::opcode_11110110(const uint8_t *OC, unsigned &Offset,
417 unsigned Length, bool Prologue) {
418 unsigned Start = (OC[Offset + 1] & 0xf0) >> 4;
419 unsigned End = (OC[Offset + 1] & 0x0f) >> 0;
420 uint32_t VFPMask = ((1 << (End - Start)) - 1) << 16;
421
422 SW.startLine() << format("0x%02x 0x%02x ; %s ", OC[Offset + 0],
423 OC[Offset + 1], Prologue ? "vpush" : "vpop");
424 printRegisters(std::make_pair(0, VFPMask));
425 OS << '\n';
426
427 Offset += 2;
428 return false;
429 }
430
431 bool Decoder::opcode_11110111(const uint8_t *OC, unsigned &Offset,
432 unsigned Length, bool Prologue) {
433 uint32_t Imm = (OC[Offset + 1] << 8) | (OC[Offset + 2] << 0);
434
435 SW.startLine() << format("0x%02x 0x%02x 0x%02x ; %s sp, sp, #(%u * 4)\n",
436 OC[Offset + 0], OC[Offset + 1], OC[Offset + 2],
437 static_cast<const char *>(Prologue ? "sub" : "add"),
438 Imm);
439
440 Offset += 3;
441 return false;
442 }
443
444 bool Decoder::opcode_11111000(const uint8_t *OC, unsigned &Offset,
445 unsigned Length, bool Prologue) {
446 uint32_t Imm = (OC[Offset + 1] << 16)
447 | (OC[Offset + 2] << 8)
448 | (OC[Offset + 3] << 0);
449
450 SW.startLine()
451 << format("0x%02x 0x%02x 0x%02x 0x%02x ; %s sp, sp, #(%u * 4)\n",
452 OC[Offset + 0], OC[Offset + 1], OC[Offset + 2], OC[Offset + 3],
453 static_cast<const char *>(Prologue ? "sub" : "add"), Imm);
454
455 Offset += 4;
456 return false;
457 }
458
459 bool Decoder::opcode_11111001(const uint8_t *OC, unsigned &Offset,
460 unsigned Length, bool Prologue) {
461 uint32_t Imm = (OC[Offset + 1] << 8) | (OC[Offset + 2] << 0);
462
463 SW.startLine()
464 << format("0x%02x 0x%02x 0x%02x ; %s.w sp, sp, #(%u * 4)\n",
465 OC[Offset + 0], OC[Offset + 1], OC[Offset + 2],
466 static_cast<const char *>(Prologue ? "sub" : "add"), Imm);
467
468 Offset += 3;
469 return false;
470 }
471
472 bool Decoder::opcode_11111010(const uint8_t *OC, unsigned &Offset,
473 unsigned Length, bool Prologue) {
474 uint32_t Imm = (OC[Offset + 1] << 16)
475 | (OC[Offset + 2] << 8)
476 | (OC[Offset + 3] << 0);
477
478 SW.startLine()
479 << format("0x%02x 0x%02x 0x%02x 0x%02x ; %s.w sp, sp, #(%u * 4)\n",
480 OC[Offset + 0], OC[Offset + 1], OC[Offset + 2], OC[Offset + 3],
481 static_cast<const char *>(Prologue ? "sub" : "add"), Imm);
482
483 Offset += 4;
484 return false;
485 }
486
487 bool Decoder::opcode_11111011(const uint8_t *OC, unsigned &Offset,
488 unsigned Length, bool Prologue) {
489 SW.startLine() << format("0x%02x ; nop\n", OC[Offset]);
490 ++Offset;
491 return false;
492 }
493
494 bool Decoder::opcode_11111100(const uint8_t *OC, unsigned &Offset,
495 unsigned Length, bool Prologue) {
496 SW.startLine() << format("0x%02x ; nop.w\n", OC[Offset]);
497 ++Offset;
498 return false;
499 }
500
501 bool Decoder::opcode_11111101(const uint8_t *OC, unsigned &Offset,
502 unsigned Length, bool Prologue) {
503 SW.startLine() << format("0x%02x ; b\n", OC[Offset]);
504 ++Offset;
505 return true;
506 }
507
508 bool Decoder::opcode_11111110(const uint8_t *OC, unsigned &Offset,
509 unsigned Length, bool Prologue) {
510 SW.startLine() << format("0x%02x ; b.w\n", OC[Offset]);
511 ++Offset;
512 return true;
513 }
514
515 bool Decoder::opcode_11111111(const uint8_t *OC, unsigned &Offset,
516 unsigned Length, bool Prologue) {
517 ++Offset;
518 return true;
519 }
520
521 // ARM64 unwind codes start here.
522 bool Decoder::opcode_alloc_s(const uint8_t *OC, unsigned &Offset,
523 unsigned Length, bool Prologue) {
524 uint32_t NumBytes = (OC[Offset] & 0x1F) << 4;
525 SW.startLine() << format("0x%02x ; %s sp, #%u\n", OC[Offset],
526 static_cast<const char *>(Prologue ? "sub" : "add"),
527 NumBytes);
528 ++Offset;
529 return false;
530 }
531
532 bool Decoder::opcode_save_r19r20_x(const uint8_t *OC, unsigned &Offset,
533 unsigned Length, bool Prologue) {
534 uint32_t Off = (OC[Offset] & 0x1F) << 3;
535 if (Prologue)
536 SW.startLine() << format(
537 "0x%02x ; stp x19, x20, [sp, #-%u]!\n", OC[Offset], Off);
538 else
539 SW.startLine() << format(
540 "0x%02x ; ldp x19, x20, [sp], #%u\n", OC[Offset], Off);
541 ++Offset;
542 return false;
543 }
544
545 bool Decoder::opcode_save_fplr(const uint8_t *OC, unsigned &Offset,
546 unsigned Length, bool Prologue) {
547 uint32_t Off = (OC[Offset] & 0x3F) << 3;
548 SW.startLine() << format(
549 "0x%02x ; %s x29, x30, [sp, #%u]\n", OC[Offset],
550 static_cast<const char *>(Prologue ? "stp" : "ldp"), Off);
551 ++Offset;
552 return false;
553 }
554
555 bool Decoder::opcode_save_fplr_x(const uint8_t *OC, unsigned &Offset,
556 unsigned Length, bool Prologue) {
557 uint32_t Off = ((OC[Offset] & 0x3F) + 1) << 3;
558 if (Prologue)
559 SW.startLine() << format(
560 "0x%02x ; stp x29, x30, [sp, #-%u]!\n", OC[Offset], Off);
561 else
562 SW.startLine() << format(
563 "0x%02x ; ldp x29, x30, [sp], #%u\n", OC[Offset], Off);
564 ++Offset;
565 return false;
566 }
567
568 bool Decoder::opcode_alloc_m(const uint8_t *OC, unsigned &Offset,
569 unsigned Length, bool Prologue) {
570 uint32_t NumBytes = ((OC[Offset] & 0x07) << 8);
571 NumBytes |= (OC[Offset + 1] & 0xFF);
572 NumBytes <<= 4;
573 SW.startLine() << format("0x%02x%02x ; %s sp, #%u\n",
574 OC[Offset], OC[Offset + 1],
575 static_cast<const char *>(Prologue ? "sub" : "add"),
576 NumBytes);
577 Offset += 2;
578 return false;
579 }
580
581 bool Decoder::opcode_save_regp(const uint8_t *OC, unsigned &Offset,
582 unsigned Length, bool Prologue) {
583 uint32_t Reg = ((OC[Offset] & 0x03) << 8);
584 Reg |= (OC[Offset + 1] & 0xC0);
585 Reg >>= 6;
586 Reg += 19;
587 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3;
588 SW.startLine() << format(
589 "0x%02x%02x ; %s x%u, x%u, [sp, #%u]\n",
590 OC[Offset], OC[Offset + 1],
591 static_cast<const char *>(Prologue ? "stp" : "ldp"), Reg, Reg + 1, Off);
592 Offset += 2;
593 return false;
594 }
595
596 bool Decoder::opcode_save_regp_x(const uint8_t *OC, unsigned &Offset,
597 unsigned Length, bool Prologue) {
598 uint32_t Reg = ((OC[Offset] & 0x03) << 8);
599 Reg |= (OC[Offset + 1] & 0xC0);
600 Reg >>= 6;
601 Reg += 19;
602 uint32_t Off = ((OC[Offset + 1] & 0x3F) + 1) << 3;
603 if (Prologue)
604 SW.startLine() << format(
605 "0x%02x%02x ; stp x%u, x%u, [sp, #-%u]!\n",
606 OC[Offset], OC[Offset + 1], Reg,
607 Reg + 1, Off);
608 else
609 SW.startLine() << format(
610 "0x%02x%02x ; ldp x%u, x%u, [sp], #%u\n",
611 OC[Offset], OC[Offset + 1], Reg,
612 Reg + 1, Off);
613 Offset += 2;
614 return false;
615 }
616
617 bool Decoder::opcode_save_reg(const uint8_t *OC, unsigned &Offset,
618 unsigned Length, bool Prologue) {
619 uint32_t Reg = (OC[Offset] & 0x03) << 8;
620 Reg |= (OC[Offset + 1] & 0xC0);
621 Reg >>= 6;
622 Reg += 19;
623 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3;
624 SW.startLine() << format("0x%02x%02x ; %s x%u, [sp, #%u]\n",
625 OC[Offset], OC[Offset + 1],
626 static_cast<const char *>(Prologue ? "str" : "ldr"),
627 Reg, Off);
628 Offset += 2;
629 return false;
630 }
631
632 bool Decoder::opcode_save_reg_x(const uint8_t *OC, unsigned &Offset,
633 unsigned Length, bool Prologue) {
634 uint32_t Reg = (OC[Offset] & 0x01) << 8;
635 Reg |= (OC[Offset + 1] & 0xE0);
636 Reg >>= 5;
637 Reg += 19;
638 uint32_t Off = ((OC[Offset + 1] & 0x1F) + 1) << 3;
639 if (Prologue)
640 SW.startLine() << format("0x%02x%02x ; str x%u, [sp, #%u]!\n",
641 OC[Offset], OC[Offset + 1], Reg, Off);
642 else
643 SW.startLine() << format("0x%02x%02x ; ldr x%u, [sp], #%u\n",
644 OC[Offset], OC[Offset + 1], Reg, Off);
645 Offset += 2;
646 return false;
647 }
648
649 bool Decoder::opcode_save_lrpair(const uint8_t *OC, unsigned &Offset,
650 unsigned Length, bool Prologue) {
651 uint32_t Reg = (OC[Offset] & 0x01) << 8;
652 Reg |= (OC[Offset + 1] & 0xC0);
653 Reg >>= 6;
654 Reg *= 2;
655 Reg += 19;
656 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3;
657 SW.startLine() << format("0x%02x%02x ; %s x%u, lr, [sp, #%u]\n",
658 OC[Offset], OC[Offset + 1],
659 static_cast<const char *>(Prologue ? "stp" : "ldp"),
660 Reg, Off);
661 Offset += 2;
662 return false;
663 }
664
665 bool Decoder::opcode_save_fregp(const uint8_t *OC, unsigned &Offset,
666 unsigned Length, bool Prologue) {
667 uint32_t Reg = (OC[Offset] & 0x01) << 8;
668 Reg |= (OC[Offset + 1] & 0xC0);
669 Reg >>= 6;
670 Reg += 8;
671 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3;
672 SW.startLine() << format("0x%02x%02x ; %s d%u, d%u, [sp, #%u]\n",
673 OC[Offset], OC[Offset + 1],
674 static_cast<const char *>(Prologue ? "stp" : "ldp"),
675 Reg, Reg + 1, Off);
676 Offset += 2;
677 return false;
678 }
679
680 bool Decoder::opcode_save_fregp_x(const uint8_t *OC, unsigned &Offset,
681 unsigned Length, bool Prologue) {
682 uint32_t Reg = (OC[Offset] & 0x01) << 8;
683 Reg |= (OC[Offset + 1] & 0xC0);
684 Reg >>= 6;
685 Reg += 8;
686 uint32_t Off = ((OC[Offset + 1] & 0x3F) + 1) << 3;
687 if (Prologue)
688 SW.startLine() << format(
689 "0x%02x%02x ; stp d%u, d%u, [sp, #-%u]!\n", OC[Offset],
690 OC[Offset + 1], Reg, Reg + 1, Off);
691 else
692 SW.startLine() << format(
693 "0x%02x%02x ; ldp d%u, d%u, [sp], #%u\n", OC[Offset],
694 OC[Offset + 1], Reg, Reg + 1, Off);
695 Offset += 2;
696 return false;
697 }
698
699 bool Decoder::opcode_save_freg(const uint8_t *OC, unsigned &Offset,
700 unsigned Length, bool Prologue) {
701 uint32_t Reg = (OC[Offset] & 0x01) << 8;
702 Reg |= (OC[Offset + 1] & 0xC0);
703 Reg >>= 6;
704 Reg += 8;
705 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3;
706 SW.startLine() << format("0x%02x%02x ; %s d%u, [sp, #%u]\n",
707 OC[Offset], OC[Offset + 1],
708 static_cast<const char *>(Prologue ? "str" : "ldr"),
709 Reg, Off);
710 Offset += 2;
711 return false;
712 }
713
714 bool Decoder::opcode_save_freg_x(const uint8_t *OC, unsigned &Offset,
715 unsigned Length, bool Prologue) {
716 uint32_t Reg = ((OC[Offset + 1] & 0xE0) >> 5) + 8;
717 uint32_t Off = ((OC[Offset + 1] & 0x1F) + 1) << 3;
718 if (Prologue)
719 SW.startLine() << format(
720 "0x%02x%02x ; str d%u, [sp, #-%u]!\n", OC[Offset],
721 OC[Offset + 1], Reg, Off);
722 else
723 SW.startLine() << format(
724 "0x%02x%02x ; ldr d%u, [sp], #%u\n", OC[Offset],
725 OC[Offset + 1], Reg, Off);
726 Offset += 2;
727 return false;
728 }
729
730 bool Decoder::opcode_alloc_l(const uint8_t *OC, unsigned &Offset,
731 unsigned Length, bool Prologue) {
732 unsigned Off =
733 (OC[Offset + 1] << 16) | (OC[Offset + 2] << 8) | (OC[Offset + 3] << 0);
734 Off <<= 4;
735 SW.startLine() << format(
736 "0x%02x%02x%02x%02x ; %s sp, #%u\n", OC[Offset], OC[Offset + 1],
737 OC[Offset + 2], OC[Offset + 3],
738 static_cast<const char *>(Prologue ? "sub" : "add"), Off);
739 Offset += 4;
740 return false;
741 }
742
743 bool Decoder::opcode_setfp(const uint8_t *OC, unsigned &Offset, unsigned Length,
744 bool Prologue) {
745 SW.startLine() << format("0x%02x ; mov fp, sp\n", OC[Offset]);
746 ++Offset;
747 return false;
748 }
749
750 bool Decoder::opcode_addfp(const uint8_t *OC, unsigned &Offset, unsigned Length,
751 bool Prologue) {
752 unsigned NumBytes = OC[Offset + 1] << 3;
753 SW.startLine() << format("0x%02x%02x ; add fp, sp, #%u\n",
754 OC[Offset], OC[Offset + 1], NumBytes);
755 Offset += 2;
756 return false;
757 }
758
759 bool Decoder::opcode_nop(const uint8_t *OC, unsigned &Offset, unsigned Length,
760 bool Prologue) {
761 SW.startLine() << format("0x%02x ; nop\n", OC[Offset]);
762 ++Offset;
763 return false;
764 }
765
766 bool Decoder::opcode_end(const uint8_t *OC, unsigned &Offset, unsigned Length,
767 bool Prologue) {
768 SW.startLine() << format("0x%02x ; end\n", OC[Offset]);
769 ++Offset;
770 return true;
771 }
772
773 bool Decoder::opcode_end_c(const uint8_t *OC, unsigned &Offset, unsigned Length,
774 bool Prologue) {
775 SW.startLine() << format("0x%02x ; end_c\n", OC[Offset]);
776 ++Offset;
777 return true;
778 }
779
780 void Decoder::decodeOpcodes(ArrayRef<uint8_t> Opcodes, unsigned Offset,
781 bool Prologue) {
782 assert((!Prologue || Offset == 0) && "prologue should always use offset 0");
783 const RingEntry* DecodeRing = isAArch64 ? Ring64 : Ring;
784 bool Terminated = false;
785 for (unsigned OI = Offset, OE = Opcodes.size(); !Terminated && OI < OE; ) {
786 for (unsigned DI = 0;; ++DI) {
787 if ((isAArch64 && (DI >= array_lengthof(Ring64))) ||
788 (!isAArch64 && (DI >= array_lengthof(Ring)))) {
789 SW.startLine() << format("0x%02x ; Bad opcode!\n",
790 Opcodes.data()[OI]);
791 ++OI;
792 break;
793 }
794
795 if ((Opcodes[OI] & DecodeRing[DI].Mask) == DecodeRing[DI].Value) {
796 if (OI + DecodeRing[DI].Length > OE) {
797 SW.startLine() << format("Opcode 0x%02x goes past the unwind data\n",
798 Opcodes[OI]);
799 OI += DecodeRing[DI].Length;
800 break;
801 }
802 Terminated =
803 (this->*DecodeRing[DI].Routine)(Opcodes.data(), OI, 0, Prologue);
804 break;
805 }
806 }
807 }
808 }
809
810 bool Decoder::dumpXDataRecord(const COFFObjectFile &COFF,
811 const SectionRef &Section,
812 uint64_t FunctionAddress, uint64_t VA) {
813 ArrayRef<uint8_t> Contents;
814 if (COFF.getSectionContents(COFF.getCOFFSection(Section), Contents))
815 return false;
816
817 uint64_t SectionVA = Section.getAddress();
818 uint64_t Offset = VA - SectionVA;
819 const ulittle32_t *Data =
820 reinterpret_cast<const ulittle32_t *>(Contents.data() + Offset);
821
822 // Sanity check to ensure that the .xdata header is present.
823 // A header is one or two words, followed by at least one word to describe
824 // the unwind codes. Applicable to both ARM and AArch64.
825 if (Contents.size() - Offset < 8)
826 report_fatal_error(".xdata must be at least 8 bytes in size");
827
828 const ExceptionDataRecord XData(Data, isAArch64);
829 DictScope XRS(SW, "ExceptionData");
830 SW.printNumber("FunctionLength",
831 isAArch64 ? XData.FunctionLengthInBytesAArch64() :
832 XData.FunctionLengthInBytesARM());
833 SW.printNumber("Version", XData.Vers());
834 SW.printBoolean("ExceptionData", XData.X());
835 SW.printBoolean("EpiloguePacked", XData.E());
836 if (!isAArch64)
837 SW.printBoolean("Fragment", XData.F());
838 SW.printNumber(XData.E() ? "EpilogueOffset" : "EpilogueScopes",
839 XData.EpilogueCount());
840 uint64_t ByteCodeLength = XData.CodeWords() * sizeof(uint32_t);
841 SW.printNumber("ByteCodeLength", ByteCodeLength);
842
843 if ((int64_t)(Contents.size() - Offset - 4 * HeaderWords(XData) -
844 (XData.E() ? 0 : XData.EpilogueCount() * 4) -
845 (XData.X() ? 8 : 0)) < (int64_t)ByteCodeLength)
846 report_fatal_error("Malformed unwind data");
847
848 if (XData.E()) {
849 ArrayRef<uint8_t> UC = XData.UnwindByteCode();
850 if (isAArch64 || !XData.F()) {
851 ListScope PS(SW, "Prologue");
852 decodeOpcodes(UC, 0, /*Prologue=*/true);
853 }
854 if (XData.EpilogueCount()) {
855 ListScope ES(SW, "Epilogue");
856 decodeOpcodes(UC, XData.EpilogueCount(), /*Prologue=*/false);
857 }
858 } else {
859 {
860 ListScope PS(SW, "Prologue");
861 decodeOpcodes(XData.UnwindByteCode(), 0, /*Prologue=*/true);
862 }
863 ArrayRef<ulittle32_t> EpilogueScopes = XData.EpilogueScopes();
864 ListScope ESS(SW, "EpilogueScopes");
865 for (const EpilogueScope ES : EpilogueScopes) {
866 DictScope ESES(SW, "EpilogueScope");
867 SW.printNumber("StartOffset", ES.EpilogueStartOffset());
868 if (!isAArch64)
869 SW.printNumber("Condition", ES.Condition());
870 SW.printNumber("EpilogueStartIndex",
871 isAArch64 ? ES.EpilogueStartIndexAArch64()
872 : ES.EpilogueStartIndexARM());
873 if (ES.ES & ~0xffc3ffff)
874 SW.printNumber("ReservedBits", (ES.ES >> 18) & 0xF);
875
876 ListScope Opcodes(SW, "Opcodes");
877 decodeOpcodes(XData.UnwindByteCode(),
878 isAArch64 ? ES.EpilogueStartIndexAArch64()
879 : ES.EpilogueStartIndexARM(),
880 /*Prologue=*/false);
881 }
882 }
883
884 if (XData.X()) {
885 const uint32_t Address = XData.ExceptionHandlerRVA();
886 const uint32_t Parameter = XData.ExceptionHandlerParameter();
887 const size_t HandlerOffset = HeaderWords(XData)
888 + (XData.E() ? 0 : XData.EpilogueCount())
889 + XData.CodeWords();
890
891 ErrorOr<SymbolRef> Symbol = getRelocatedSymbol(
892 COFF, Section, Offset + HandlerOffset * sizeof(uint32_t));
893 if (!Symbol)
894 Symbol = getSymbol(COFF, Address, /*FunctionOnly=*/true);
895 if (!Symbol) {
896 ListScope EHS(SW, "ExceptionHandler");
897 SW.printString("Routine", "(null)");
898 return true;
899 }
900
901 Expected<StringRef> Name = Symbol->getName();
902 if (!Name) {
903 std::string Buf;
904 llvm::raw_string_ostream OS(Buf);
905 logAllUnhandledErrors(Name.takeError(), OS);
906 OS.flush();
907 report_fatal_error(Buf);
908 }
909
910 ListScope EHS(SW, "ExceptionHandler");
911 SW.printString("Routine", formatSymbol(*Name, Address));
912 SW.printHex("Parameter", Parameter);
913 }
914
915 return true;
916 }
917
918 bool Decoder::dumpUnpackedEntry(const COFFObjectFile &COFF,
919 const SectionRef Section, uint64_t Offset,
920 unsigned Index, const RuntimeFunction &RF) {
921 assert(RF.Flag() == RuntimeFunctionFlag::RFF_Unpacked &&
922 "packed entry cannot be treated as an unpacked entry");
923
924 ErrorOr<SymbolRef> Function = getRelocatedSymbol(COFF, Section, Offset);
925 if (!Function)
926 Function = getSymbol(COFF, RF.BeginAddress, /*FunctionOnly=*/true);
927
928 ErrorOr<SymbolRef> XDataRecord = getRelocatedSymbol(COFF, Section, Offset + 4);
929 if (!XDataRecord)
930 XDataRecord = getSymbol(COFF, RF.ExceptionInformationRVA());
931
932 if (!RF.BeginAddress && !Function)
933 return false;
934 if (!RF.UnwindData && !XDataRecord)
935 return false;
936
937 StringRef FunctionName;
938 uint64_t FunctionAddress;
939 if (Function) {
940 Expected<StringRef> FunctionNameOrErr = Function->getName();
941 if (!FunctionNameOrErr) {
942 std::string Buf;
943 llvm::raw_string_ostream OS(Buf);
944 logAllUnhandledErrors(FunctionNameOrErr.takeError(), OS);
945 OS.flush();
946 report_fatal_error(Buf);
947 }
948 FunctionName = *FunctionNameOrErr;
949 Expected<uint64_t> FunctionAddressOrErr = Function->getAddress();
950 if (!FunctionAddressOrErr) {
951 std::string Buf;
952 llvm::raw_string_ostream OS(Buf);
953 logAllUnhandledErrors(FunctionAddressOrErr.takeError(), OS);
954 OS.flush();
955 report_fatal_error(Buf);
956 }
957 FunctionAddress = *FunctionAddressOrErr;
958 } else {
959 FunctionAddress = COFF.getImageBase() + RF.BeginAddress;
960 }
961
962 SW.printString("Function", formatSymbol(FunctionName, FunctionAddress));
963
964 if (XDataRecord) {
965 Expected<StringRef> Name = XDataRecord->getName();
966 if (!Name) {
967 std::string Buf;
968 llvm::raw_string_ostream OS(Buf);
969 logAllUnhandledErrors(Name.takeError(), OS);
970 OS.flush();
971 report_fatal_error(Buf);
972 }
973
974 Expected<uint64_t> AddressOrErr = XDataRecord->getAddress();
975 if (!AddressOrErr) {
976 std::string Buf;
977 llvm::raw_string_ostream OS(Buf);
978 logAllUnhandledErrors(AddressOrErr.takeError(), OS);
979 OS.flush();
980 report_fatal_error(Buf);
981 }
982 uint64_t Address = *AddressOrErr;
983
984 SW.printString("ExceptionRecord", formatSymbol(*Name, Address));
985
986 Expected<section_iterator> SIOrErr = XDataRecord->getSection();
987 if (!SIOrErr) {
988 // TODO: Actually report errors helpfully.
989 consumeError(SIOrErr.takeError());
990 return false;
991 }
992 section_iterator SI = *SIOrErr;
993
994 // FIXME: Do we need to add an offset from the relocation?
995 return dumpXDataRecord(COFF, *SI, FunctionAddress,
996 RF.ExceptionInformationRVA());
997 } else {
998 uint64_t Address = COFF.getImageBase() + RF.ExceptionInformationRVA();
999 SW.printString("ExceptionRecord", formatSymbol("", Address));
1000
1001 ErrorOr<SectionRef> Section = getSectionContaining(COFF, Address);
1002 if (!Section)
1003 return false;
1004
1005 return dumpXDataRecord(COFF, *Section, FunctionAddress, Address);
1006 }
1007 }
1008
1009 bool Decoder::dumpPackedEntry(const object::COFFObjectFile &COFF,
1010 const SectionRef Section, uint64_t Offset,
1011 unsigned Index, const RuntimeFunction &RF) {
1012 assert((RF.Flag() == RuntimeFunctionFlag::RFF_Packed ||
1013 RF.Flag() == RuntimeFunctionFlag::RFF_PackedFragment) &&
1014 "unpacked entry cannot be treated as a packed entry");
1015
1016 ErrorOr<SymbolRef> Function = getRelocatedSymbol(COFF, Section, Offset);
1017 if (!Function)
1018 Function = getSymbol(COFF, RF.BeginAddress, /*FunctionOnly=*/true);
1019
1020 StringRef FunctionName;
1021 uint64_t FunctionAddress;
1022 if (Function) {
1023 Expected<StringRef> FunctionNameOrErr = Function->getName();
1024 if (!FunctionNameOrErr) {
1025 std::string Buf;
1026 llvm::raw_string_ostream OS(Buf);
1027 logAllUnhandledErrors(FunctionNameOrErr.takeError(), OS);
1028 OS.flush();
1029 report_fatal_error(Buf);
1030 }
1031 FunctionName = *FunctionNameOrErr;
1032 Expected<uint64_t> FunctionAddressOrErr = Function->getAddress();
1033 if (!FunctionAddressOrErr) {
1034 std::string Buf;
1035 llvm::raw_string_ostream OS(Buf);
1036 logAllUnhandledErrors(FunctionAddressOrErr.takeError(), OS);
1037 OS.flush();
1038 report_fatal_error(Buf);
1039 }
1040 FunctionAddress = *FunctionAddressOrErr;
1041 } else {
1042 const pe32_header *PEHeader;
1043 if (COFF.getPE32Header(PEHeader))
1044 return false;
1045 FunctionAddress = PEHeader->ImageBase + RF.BeginAddress;
1046 }
1047
1048 SW.printString("Function", formatSymbol(FunctionName, FunctionAddress));
1049 if (!isAArch64)
1050 SW.printBoolean("Fragment",
1051 RF.Flag() == RuntimeFunctionFlag::RFF_PackedFragment);
1052 SW.printNumber("FunctionLength", RF.FunctionLength());
1053 SW.startLine() << "ReturnType: " << RF.Ret() << '\n';
1054 SW.printBoolean("HomedParameters", RF.H());
1055 SW.startLine() << "SavedRegisters: ";
1056 printRegisters(SavedRegisterMask(RF));
1057 OS << '\n';
1058 SW.printNumber("StackAdjustment", StackAdjustment(RF) << 2);
1059
1060 return true;
1061 }
1062
1063 bool Decoder::dumpProcedureDataEntry(const COFFObjectFile &COFF,
1064 const SectionRef Section, unsigned Index,
1065 ArrayRef<uint8_t> Contents) {
1066 uint64_t Offset = PDataEntrySize * Index;
1067 const ulittle32_t *Data =
1068 reinterpret_cast<const ulittle32_t *>(Contents.data() + Offset);
1069
1070 const RuntimeFunction Entry(Data);
1071 DictScope RFS(SW, "RuntimeFunction");
1072 if (Entry.Flag() == RuntimeFunctionFlag::RFF_Unpacked)
1073 return dumpUnpackedEntry(COFF, Section, Offset, Index, Entry);
1074 if (isAArch64) {
1075 SW.startLine() << "Packed unwind data not yet supported for ARM64\n";
1076 return true;
1077 }
1078 return dumpPackedEntry(COFF, Section, Offset, Index, Entry);
1079 }
1080
1081 void Decoder::dumpProcedureData(const COFFObjectFile &COFF,
1082 const SectionRef Section) {
1083 ArrayRef<uint8_t> Contents;
1084 if (COFF.getSectionContents(COFF.getCOFFSection(Section), Contents))
1085 return;
1086
1087 if (Contents.size() % PDataEntrySize) {
1088 errs() << ".pdata content is not " << PDataEntrySize << "-byte aligned\n";
1089 return;
1090 }
1091
1092 for (unsigned EI = 0, EE = Contents.size() / PDataEntrySize; EI < EE; ++EI)
1093 if (!dumpProcedureDataEntry(COFF, Section, EI, Contents))
1094 break;
1095 }
1096
1097 Error Decoder::dumpProcedureData(const COFFObjectFile &COFF) {
1098 for (const auto &Section : COFF.sections()) {
1099 Expected<StringRef> NameOrErr =
1100 COFF.getSectionName(COFF.getCOFFSection(Section));
1101 if (!NameOrErr)
1102 return NameOrErr.takeError();
1103
1104 if (NameOrErr->startswith(".pdata"))
1105 dumpProcedureData(COFF, Section);
1106 }
1107 return Error::success();
1108 }
1109 }
1110 }
1111 }
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