1 //===-- MipsELFObjectWriter.cpp - Mips ELF Writer -------------------------===//
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 //===----------------------------------------------------------------------===//
12 #include "MCTargetDesc/MipsBaseInfo.h"
13 #include "MCTargetDesc/MipsFixupKinds.h"
14 #include "MCTargetDesc/MipsMCExpr.h"
15 #include "MCTargetDesc/MipsMCTargetDesc.h"
16 #include "llvm/ADT/STLExtras.h"
17 #include "llvm/MC/MCAssembler.h"
18 #include "llvm/MC/MCELFObjectWriter.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCSection.h"
21 #include "llvm/MC/MCSymbolELF.h"
22 #include "llvm/MC/MCValue.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Support/ErrorHandling.h"
26 #define DEBUG_TYPE "mips-elf-object-writer"
31 /// Holds additional information needed by the relocation ordering algorithm.
32 struct MipsRelocationEntry {
33 const ELFRelocationEntry R; ///< The relocation.
34 bool Matched; ///< Is this relocation part of a match.
36 MipsRelocationEntry(const ELFRelocationEntry &R) : R(R), Matched(false) {}
38 void print(raw_ostream &Out) const {
40 Out << ", Matched=" << Matched;
45 raw_ostream &operator<<(raw_ostream &OS, const MipsRelocationEntry &RHS) {
51 class MipsELFObjectWriter : public MCELFObjectTargetWriter {
53 MipsELFObjectWriter(bool _is64Bit, uint8_t OSABI, bool _isN64,
56 ~MipsELFObjectWriter() override;
58 unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
59 const MCFixup &Fixup, bool IsPCRel) const override;
60 bool needsRelocateWithSymbol(const MCSymbol &Sym,
61 unsigned Type) const override;
62 virtual void sortRelocs(const MCAssembler &Asm,
63 std::vector<ELFRelocationEntry> &Relocs) override;
66 /// Copy elements in the range [First, Last) to d1 when the predicate is true or
67 /// d2 when the predicate is false. This is essentially both std::copy_if and
68 /// std::remove_copy_if combined into a single pass.
69 template <class InputIt, class OutputIt1, class OutputIt2, class UnaryPredicate>
70 std::pair<OutputIt1, OutputIt2> copy_if_else(InputIt First, InputIt Last,
71 OutputIt1 d1, OutputIt2 d2,
72 UnaryPredicate Predicate) {
73 for (InputIt I = First; I != Last; ++I) {
83 return std::make_pair(d1, d2);
86 /// The possible results of the Predicate function used by find_best.
87 enum FindBestPredicateResult {
88 FindBest_NoMatch = 0, ///< The current element is not a match.
89 FindBest_Match, ///< The current element is a match but better ones are
91 FindBest_PerfectMatch, ///< The current element is an unbeatable match.
94 /// Find the best match in the range [First, Last).
96 /// An element matches when Predicate(X) returns FindBest_Match or
97 /// FindBest_PerfectMatch. A value of FindBest_PerfectMatch also terminates
98 /// the search. BetterThan(A, B) is a comparator that returns true when A is a
99 /// better match than B. The return value is the position of the best match.
101 /// This is similar to std::find_if but finds the best of multiple possible
103 template <class InputIt, class UnaryPredicate, class Comparator>
104 InputIt find_best(InputIt First, InputIt Last, UnaryPredicate Predicate,
105 Comparator BetterThan) {
108 for (InputIt I = First; I != Last; ++I) {
109 unsigned Matched = Predicate(*I);
110 if (Matched != FindBest_NoMatch) {
111 DEBUG(dbgs() << std::distance(First, I) << " is a match (";
112 I->print(dbgs()); dbgs() << ")\n");
113 if (Best == Last || BetterThan(*I, *Best)) {
114 DEBUG(dbgs() << ".. and it beats the last one\n");
118 if (Matched == FindBest_PerfectMatch) {
119 DEBUG(dbgs() << ".. and it is unbeatable\n");
127 /// Determine the low relocation that matches the given relocation.
128 /// If the relocation does not need a low relocation then the return value
129 /// is ELF::R_MIPS_NONE.
131 /// The relocations that need a matching low part are
132 /// R_(MIPS|MICROMIPS|MIPS16)_HI16 for all symbols and
133 /// R_(MIPS|MICROMIPS|MIPS16)_GOT16 for local symbols only.
134 static unsigned getMatchingLoType(const ELFRelocationEntry &Reloc) {
135 unsigned Type = Reloc.Type;
136 if (Type == ELF::R_MIPS_HI16)
137 return ELF::R_MIPS_LO16;
138 if (Type == ELF::R_MICROMIPS_HI16)
139 return ELF::R_MICROMIPS_LO16;
140 if (Type == ELF::R_MIPS16_HI16)
141 return ELF::R_MIPS16_LO16;
143 if (Reloc.OriginalSymbol->getBinding() != ELF::STB_LOCAL)
144 return ELF::R_MIPS_NONE;
146 if (Type == ELF::R_MIPS_GOT16)
147 return ELF::R_MIPS_LO16;
148 if (Type == ELF::R_MICROMIPS_GOT16)
149 return ELF::R_MICROMIPS_LO16;
150 if (Type == ELF::R_MIPS16_GOT16)
151 return ELF::R_MIPS16_LO16;
153 return ELF::R_MIPS_NONE;
156 /// Determine whether a relocation (X) matches the one given in R.
158 /// A relocation matches if:
159 /// - It's type matches that of a corresponding low part. This is provided in
160 /// MatchingType for efficiency.
161 /// - It's based on the same symbol.
162 /// - It's offset of greater or equal to that of the one given in R.
163 /// It should be noted that this rule assumes the programmer does not use
164 /// offsets that exceed the alignment of the symbol. The carry-bit will be
165 /// incorrect if this is not true.
167 /// A matching relocation is unbeatable if:
168 /// - It is not already involved in a match.
169 /// - It's offset is exactly that of the one given in R.
170 static FindBestPredicateResult isMatchingReloc(const MipsRelocationEntry &X,
171 const ELFRelocationEntry &R,
172 unsigned MatchingType) {
173 if (X.R.Type == MatchingType && X.R.OriginalSymbol == R.OriginalSymbol) {
175 X.R.OriginalAddend == R.OriginalAddend)
176 return FindBest_PerfectMatch;
177 else if (X.R.OriginalAddend >= R.OriginalAddend)
178 return FindBest_Match;
180 return FindBest_NoMatch;
183 /// Determine whether Candidate or PreviousBest is the better match.
184 /// The return value is true if Candidate is the better match.
186 /// A matching relocation is a better match if:
187 /// - It has a smaller addend.
188 /// - It is not already involved in a match.
189 static bool compareMatchingRelocs(const MipsRelocationEntry &Candidate,
190 const MipsRelocationEntry &PreviousBest) {
191 if (Candidate.R.OriginalAddend != PreviousBest.R.OriginalAddend)
192 return Candidate.R.OriginalAddend < PreviousBest.R.OriginalAddend;
193 return PreviousBest.Matched && !Candidate.Matched;
197 /// Print all the relocations.
198 template <class Container>
199 static void dumpRelocs(const char *Prefix, const Container &Relocs) {
200 for (const auto &R : Relocs)
201 dbgs() << Prefix << R << "\n";
205 } // end anonymous namespace
207 MipsELFObjectWriter::MipsELFObjectWriter(bool _is64Bit, uint8_t OSABI,
208 bool _isN64, bool IsLittleEndian)
209 : MCELFObjectTargetWriter(_is64Bit, OSABI, ELF::EM_MIPS,
210 /*HasRelocationAddend*/ _isN64,
213 MipsELFObjectWriter::~MipsELFObjectWriter() {}
215 unsigned MipsELFObjectWriter::getRelocType(MCContext &Ctx,
216 const MCValue &Target,
217 const MCFixup &Fixup,
218 bool IsPCRel) const {
219 // Determine the type of the relocation.
220 unsigned Kind = (unsigned)Fixup.getKind();
223 case Mips::fixup_Mips_NONE:
224 return ELF::R_MIPS_NONE;
225 case Mips::fixup_Mips_16:
227 return IsPCRel ? ELF::R_MIPS_PC16 : ELF::R_MIPS_16;
228 case Mips::fixup_Mips_32:
230 return IsPCRel ? ELF::R_MIPS_PC32 : ELF::R_MIPS_32;
235 case Mips::fixup_Mips_Branch_PCRel:
236 case Mips::fixup_Mips_PC16:
237 return ELF::R_MIPS_PC16;
238 case Mips::fixup_MICROMIPS_PC7_S1:
239 return ELF::R_MICROMIPS_PC7_S1;
240 case Mips::fixup_MICROMIPS_PC10_S1:
241 return ELF::R_MICROMIPS_PC10_S1;
242 case Mips::fixup_MICROMIPS_PC16_S1:
243 return ELF::R_MICROMIPS_PC16_S1;
244 case Mips::fixup_MICROMIPS_PC26_S1:
245 return ELF::R_MICROMIPS_PC26_S1;
246 case Mips::fixup_MICROMIPS_PC19_S2:
247 return ELF::R_MICROMIPS_PC19_S2;
248 case Mips::fixup_MICROMIPS_PC18_S3:
249 return ELF::R_MICROMIPS_PC18_S3;
250 case Mips::fixup_MICROMIPS_PC21_S1:
251 return ELF::R_MICROMIPS_PC21_S1;
252 case Mips::fixup_MIPS_PC19_S2:
253 return ELF::R_MIPS_PC19_S2;
254 case Mips::fixup_MIPS_PC18_S3:
255 return ELF::R_MIPS_PC18_S3;
256 case Mips::fixup_MIPS_PC21_S2:
257 return ELF::R_MIPS_PC21_S2;
258 case Mips::fixup_MIPS_PC26_S2:
259 return ELF::R_MIPS_PC26_S2;
260 case Mips::fixup_MIPS_PCHI16:
261 return ELF::R_MIPS_PCHI16;
262 case Mips::fixup_MIPS_PCLO16:
263 return ELF::R_MIPS_PCLO16;
266 llvm_unreachable("invalid PC-relative fixup kind!");
270 case Mips::fixup_Mips_64:
272 return ELF::R_MIPS_64;
274 return ELF::R_MIPS_TLS_DTPREL32;
276 return ELF::R_MIPS_TLS_DTPREL64;
278 return ELF::R_MIPS_TLS_TPREL32;
280 return ELF::R_MIPS_TLS_TPREL64;
283 unsigned Type = (unsigned)ELF::R_MIPS_NONE;
284 Type = setRType((unsigned)ELF::R_MIPS_GPREL32, Type);
285 Type = setRType2((unsigned)ELF::R_MIPS_64, Type);
286 Type = setRType3((unsigned)ELF::R_MIPS_NONE, Type);
289 return ELF::R_MIPS_GPREL32;
290 case Mips::fixup_Mips_GPREL16:
291 return ELF::R_MIPS_GPREL16;
292 case Mips::fixup_Mips_26:
293 return ELF::R_MIPS_26;
294 case Mips::fixup_Mips_CALL16:
295 return ELF::R_MIPS_CALL16;
296 case Mips::fixup_Mips_GOT:
297 return ELF::R_MIPS_GOT16;
298 case Mips::fixup_Mips_HI16:
299 return ELF::R_MIPS_HI16;
300 case Mips::fixup_Mips_LO16:
301 return ELF::R_MIPS_LO16;
302 case Mips::fixup_Mips_TLSGD:
303 return ELF::R_MIPS_TLS_GD;
304 case Mips::fixup_Mips_GOTTPREL:
305 return ELF::R_MIPS_TLS_GOTTPREL;
306 case Mips::fixup_Mips_TPREL_HI:
307 return ELF::R_MIPS_TLS_TPREL_HI16;
308 case Mips::fixup_Mips_TPREL_LO:
309 return ELF::R_MIPS_TLS_TPREL_LO16;
310 case Mips::fixup_Mips_TLSLDM:
311 return ELF::R_MIPS_TLS_LDM;
312 case Mips::fixup_Mips_DTPREL_HI:
313 return ELF::R_MIPS_TLS_DTPREL_HI16;
314 case Mips::fixup_Mips_DTPREL_LO:
315 return ELF::R_MIPS_TLS_DTPREL_LO16;
316 case Mips::fixup_Mips_GOT_PAGE:
317 return ELF::R_MIPS_GOT_PAGE;
318 case Mips::fixup_Mips_GOT_OFST:
319 return ELF::R_MIPS_GOT_OFST;
320 case Mips::fixup_Mips_GOT_DISP:
321 return ELF::R_MIPS_GOT_DISP;
322 case Mips::fixup_Mips_GPOFF_HI: {
323 unsigned Type = (unsigned)ELF::R_MIPS_NONE;
324 Type = setRType((unsigned)ELF::R_MIPS_GPREL16, Type);
325 Type = setRType2((unsigned)ELF::R_MIPS_SUB, Type);
326 Type = setRType3((unsigned)ELF::R_MIPS_HI16, Type);
329 case Mips::fixup_Mips_GPOFF_LO: {
330 unsigned Type = (unsigned)ELF::R_MIPS_NONE;
331 Type = setRType((unsigned)ELF::R_MIPS_GPREL16, Type);
332 Type = setRType2((unsigned)ELF::R_MIPS_SUB, Type);
333 Type = setRType3((unsigned)ELF::R_MIPS_LO16, Type);
336 case Mips::fixup_Mips_HIGHER:
337 return ELF::R_MIPS_HIGHER;
338 case Mips::fixup_Mips_HIGHEST:
339 return ELF::R_MIPS_HIGHEST;
340 case Mips::fixup_Mips_SUB:
341 return ELF::R_MIPS_SUB;
342 case Mips::fixup_Mips_GOT_HI16:
343 return ELF::R_MIPS_GOT_HI16;
344 case Mips::fixup_Mips_GOT_LO16:
345 return ELF::R_MIPS_GOT_LO16;
346 case Mips::fixup_Mips_CALL_HI16:
347 return ELF::R_MIPS_CALL_HI16;
348 case Mips::fixup_Mips_CALL_LO16:
349 return ELF::R_MIPS_CALL_LO16;
350 case Mips::fixup_MICROMIPS_26_S1:
351 return ELF::R_MICROMIPS_26_S1;
352 case Mips::fixup_MICROMIPS_HI16:
353 return ELF::R_MICROMIPS_HI16;
354 case Mips::fixup_MICROMIPS_LO16:
355 return ELF::R_MICROMIPS_LO16;
356 case Mips::fixup_MICROMIPS_GOT16:
357 return ELF::R_MICROMIPS_GOT16;
358 case Mips::fixup_MICROMIPS_CALL16:
359 return ELF::R_MICROMIPS_CALL16;
360 case Mips::fixup_MICROMIPS_GOT_DISP:
361 return ELF::R_MICROMIPS_GOT_DISP;
362 case Mips::fixup_MICROMIPS_GOT_PAGE:
363 return ELF::R_MICROMIPS_GOT_PAGE;
364 case Mips::fixup_MICROMIPS_GOT_OFST:
365 return ELF::R_MICROMIPS_GOT_OFST;
366 case Mips::fixup_MICROMIPS_TLS_GD:
367 return ELF::R_MICROMIPS_TLS_GD;
368 case Mips::fixup_MICROMIPS_TLS_LDM:
369 return ELF::R_MICROMIPS_TLS_LDM;
370 case Mips::fixup_MICROMIPS_TLS_DTPREL_HI16:
371 return ELF::R_MICROMIPS_TLS_DTPREL_HI16;
372 case Mips::fixup_MICROMIPS_TLS_DTPREL_LO16:
373 return ELF::R_MICROMIPS_TLS_DTPREL_LO16;
374 case Mips::fixup_MICROMIPS_TLS_TPREL_HI16:
375 return ELF::R_MICROMIPS_TLS_TPREL_HI16;
376 case Mips::fixup_MICROMIPS_TLS_TPREL_LO16:
377 return ELF::R_MICROMIPS_TLS_TPREL_LO16;
378 case Mips::fixup_MICROMIPS_SUB:
379 return ELF::R_MICROMIPS_SUB;
382 llvm_unreachable("invalid fixup kind!");
385 /// Sort relocation table entries by offset except where another order is
386 /// required by the MIPS ABI.
388 /// MIPS has a few relocations that have an AHL component in the expression used
389 /// to evaluate them. This AHL component is an addend with the same number of
390 /// bits as a symbol value but not all of our ABI's are able to supply a
391 /// sufficiently sized addend in a single relocation.
393 /// The O32 ABI for example, uses REL relocations which store the addend in the
394 /// section data. All the relocations with AHL components affect 16-bit fields
395 /// so the addend for a single relocation is limited to 16-bit. This ABI
396 /// resolves the limitation by linking relocations (e.g. R_MIPS_HI16 and
397 /// R_MIPS_LO16) and distributing the addend between the linked relocations. The
398 /// ABI mandates that such relocations must be next to each other in a
399 /// particular order (e.g. R_MIPS_HI16 must be immediately followed by a
400 /// matching R_MIPS_LO16) but the rule is less strict in practice.
402 /// The de facto standard is lenient in the following ways:
403 /// - 'Immediately following' does not refer to the next relocation entry but
404 /// the next matching relocation.
405 /// - There may be multiple high parts relocations for one low part relocation.
406 /// - There may be multiple low part relocations for one high part relocation.
407 /// - The AHL addend in each part does not have to be exactly equal as long as
408 /// the difference does not affect the carry bit from bit 15 into 16. This is
409 /// to allow, for example, the use of %lo(foo) and %lo(foo+4) when loading
410 /// both halves of a long long.
412 /// See getMatchingLoType() for a description of which high part relocations
413 /// match which low part relocations. One particular thing to note is that
414 /// R_MIPS_GOT16 and similar only have AHL addends if they refer to local
417 /// It should also be noted that this function is not affected by whether
418 /// the symbol was kept or rewritten into a section-relative equivalent. We
419 /// always match using the expressions from the source.
420 void MipsELFObjectWriter::sortRelocs(const MCAssembler &Asm,
421 std::vector<ELFRelocationEntry> &Relocs) {
423 // We do not need to sort the relocation table for RELA relocations which
424 // N32/N64 uses as the relocation addend contains the value we require,
425 // rather than it being split across a pair of relocations.
426 if (hasRelocationAddend())
429 if (Relocs.size() < 2)
432 // Sort relocations by the address they are applied to.
433 std::sort(Relocs.begin(), Relocs.end(),
434 [](const ELFRelocationEntry &A, const ELFRelocationEntry &B) {
435 return A.Offset < B.Offset;
438 std::list<MipsRelocationEntry> Sorted;
439 std::list<ELFRelocationEntry> Remainder;
441 DEBUG(dumpRelocs("R: ", Relocs));
443 // Separate the movable relocations (AHL relocations using the high bits) from
444 // the immobile relocations (everything else). This does not preserve high/low
445 // matches that already existed in the input.
446 copy_if_else(Relocs.begin(), Relocs.end(), std::back_inserter(Remainder),
447 std::back_inserter(Sorted), [](const ELFRelocationEntry &Reloc) {
448 return getMatchingLoType(Reloc) != ELF::R_MIPS_NONE;
451 for (auto &R : Remainder) {
452 DEBUG(dbgs() << "Matching: " << R << "\n");
454 unsigned MatchingType = getMatchingLoType(R);
455 assert(MatchingType != ELF::R_MIPS_NONE &&
456 "Wrong list for reloc that doesn't need a match");
458 // Find the best matching relocation for the current high part.
459 // See isMatchingReloc for a description of a matching relocation and
460 // compareMatchingRelocs for a description of what 'best' means.
461 auto InsertionPoint =
462 find_best(Sorted.begin(), Sorted.end(),
463 [&R, &MatchingType](const MipsRelocationEntry &X) {
464 return isMatchingReloc(X, R, MatchingType);
466 compareMatchingRelocs);
468 // If we matched then insert the high part in front of the match and mark
469 // both relocations as being involved in a match. We only mark the high
470 // part for cosmetic reasons in the debug output.
472 // If we failed to find a match then the high part is orphaned. This is not
473 // permitted since the relocation cannot be evaluated without knowing the
474 // carry-in. We can sometimes handle this using a matching low part that is
475 // already used in a match but we already cover that case in
476 // isMatchingReloc and compareMatchingRelocs. For the remaining cases we
477 // should insert the high part at the end of the list. This will cause the
478 // linker to fail but the alternative is to cause the linker to bind the
479 // high part to a semi-matching low part and silently calculate the wrong
480 // value. Unfortunately we have no means to warn the user that we did this
481 // so leave it up to the linker to complain about it.
482 if (InsertionPoint != Sorted.end())
483 InsertionPoint->Matched = true;
484 Sorted.insert(InsertionPoint, R)->Matched = true;
487 DEBUG(dumpRelocs("S: ", Sorted));
489 assert(Relocs.size() == Sorted.size() && "Some relocs were not consumed");
491 // Overwrite the original vector with the sorted elements. The caller expects
492 // them in reverse order.
494 for (const auto &R : reverse(Sorted))
495 Relocs[CopyTo++] = R.R;
498 bool MipsELFObjectWriter::needsRelocateWithSymbol(const MCSymbol &Sym,
499 unsigned Type) const {
500 // If it's a compound relocation for N64 then we need the relocation if any
501 // sub-relocation needs it.
502 if (!isUInt<8>(Type))
503 return needsRelocateWithSymbol(Sym, Type & 0xff) ||
504 needsRelocateWithSymbol(Sym, (Type >> 8) & 0xff) ||
505 needsRelocateWithSymbol(Sym, (Type >> 16) & 0xff);
509 errs() << Type << "\n";
510 llvm_unreachable("Unexpected relocation");
513 // This relocation doesn't affect the section data.
514 case ELF::R_MIPS_NONE:
517 // On REL ABI's (e.g. O32), these relocations form pairs. The pairing is done
518 // by the static linker by matching the symbol and offset.
519 // We only see one relocation at a time but it's still safe to relocate with
520 // the section so long as both relocations make the same decision.
522 // Some older linkers may require the symbol for particular cases. Such cases
523 // are not supported yet but can be added as required.
524 case ELF::R_MIPS_GOT16:
525 case ELF::R_MIPS16_GOT16:
526 case ELF::R_MICROMIPS_GOT16:
527 case ELF::R_MIPS_HI16:
528 case ELF::R_MIPS16_HI16:
529 case ELF::R_MICROMIPS_HI16:
530 case ELF::R_MIPS_LO16:
531 case ELF::R_MIPS16_LO16:
532 case ELF::R_MICROMIPS_LO16:
533 // FIXME: It should be safe to return false for the STO_MIPS_MICROMIPS but
534 // we neglect to handle the adjustment to the LSB of the addend that
535 // it causes in applyFixup() and similar.
536 if (cast<MCSymbolELF>(Sym).getOther() & ELF::STO_MIPS_MICROMIPS)
540 case ELF::R_MIPS_GOT_PAGE:
541 case ELF::R_MICROMIPS_GOT_PAGE:
542 case ELF::R_MIPS_GOT_OFST:
543 case ELF::R_MICROMIPS_GOT_OFST:
546 case ELF::R_MIPS_GPREL32:
547 if (cast<MCSymbolELF>(Sym).getOther() & ELF::STO_MIPS_MICROMIPS)
552 case ELF::R_MIPS_GPREL16:
553 case ELF::R_MIPS_PC16:
554 case ELF::R_MIPS_SUB:
557 // FIXME: Many of these relocations should probably return false but this
558 // hasn't been confirmed to be safe yet.
559 case ELF::R_MIPS_REL32:
560 case ELF::R_MIPS_LITERAL:
561 case ELF::R_MIPS_CALL16:
562 case ELF::R_MIPS_SHIFT5:
563 case ELF::R_MIPS_SHIFT6:
564 case ELF::R_MIPS_GOT_DISP:
565 case ELF::R_MIPS_GOT_HI16:
566 case ELF::R_MIPS_GOT_LO16:
567 case ELF::R_MIPS_INSERT_A:
568 case ELF::R_MIPS_INSERT_B:
569 case ELF::R_MIPS_DELETE:
570 case ELF::R_MIPS_HIGHER:
571 case ELF::R_MIPS_HIGHEST:
572 case ELF::R_MIPS_CALL_HI16:
573 case ELF::R_MIPS_CALL_LO16:
574 case ELF::R_MIPS_SCN_DISP:
575 case ELF::R_MIPS_REL16:
576 case ELF::R_MIPS_ADD_IMMEDIATE:
577 case ELF::R_MIPS_PJUMP:
578 case ELF::R_MIPS_RELGOT:
579 case ELF::R_MIPS_JALR:
580 case ELF::R_MIPS_TLS_DTPMOD32:
581 case ELF::R_MIPS_TLS_DTPREL32:
582 case ELF::R_MIPS_TLS_DTPMOD64:
583 case ELF::R_MIPS_TLS_DTPREL64:
584 case ELF::R_MIPS_TLS_GD:
585 case ELF::R_MIPS_TLS_LDM:
586 case ELF::R_MIPS_TLS_DTPREL_HI16:
587 case ELF::R_MIPS_TLS_DTPREL_LO16:
588 case ELF::R_MIPS_TLS_GOTTPREL:
589 case ELF::R_MIPS_TLS_TPREL32:
590 case ELF::R_MIPS_TLS_TPREL64:
591 case ELF::R_MIPS_TLS_TPREL_HI16:
592 case ELF::R_MIPS_TLS_TPREL_LO16:
593 case ELF::R_MIPS_GLOB_DAT:
594 case ELF::R_MIPS_PC21_S2:
595 case ELF::R_MIPS_PC26_S2:
596 case ELF::R_MIPS_PC18_S3:
597 case ELF::R_MIPS_PC19_S2:
598 case ELF::R_MIPS_PCHI16:
599 case ELF::R_MIPS_PCLO16:
600 case ELF::R_MIPS_COPY:
601 case ELF::R_MIPS_JUMP_SLOT:
602 case ELF::R_MIPS_NUM:
603 case ELF::R_MIPS_PC32:
605 case ELF::R_MICROMIPS_26_S1:
606 case ELF::R_MICROMIPS_GPREL16:
607 case ELF::R_MICROMIPS_LITERAL:
608 case ELF::R_MICROMIPS_PC7_S1:
609 case ELF::R_MICROMIPS_PC10_S1:
610 case ELF::R_MICROMIPS_PC16_S1:
611 case ELF::R_MICROMIPS_CALL16:
612 case ELF::R_MICROMIPS_GOT_DISP:
613 case ELF::R_MICROMIPS_GOT_HI16:
614 case ELF::R_MICROMIPS_GOT_LO16:
615 case ELF::R_MICROMIPS_SUB:
616 case ELF::R_MICROMIPS_HIGHER:
617 case ELF::R_MICROMIPS_HIGHEST:
618 case ELF::R_MICROMIPS_CALL_HI16:
619 case ELF::R_MICROMIPS_CALL_LO16:
620 case ELF::R_MICROMIPS_SCN_DISP:
621 case ELF::R_MICROMIPS_JALR:
622 case ELF::R_MICROMIPS_HI0_LO16:
623 case ELF::R_MICROMIPS_TLS_GD:
624 case ELF::R_MICROMIPS_TLS_LDM:
625 case ELF::R_MICROMIPS_TLS_DTPREL_HI16:
626 case ELF::R_MICROMIPS_TLS_DTPREL_LO16:
627 case ELF::R_MICROMIPS_TLS_GOTTPREL:
628 case ELF::R_MICROMIPS_TLS_TPREL_HI16:
629 case ELF::R_MICROMIPS_TLS_TPREL_LO16:
630 case ELF::R_MICROMIPS_GPREL7_S2:
631 case ELF::R_MICROMIPS_PC23_S2:
632 case ELF::R_MICROMIPS_PC21_S1:
633 case ELF::R_MICROMIPS_PC26_S1:
634 case ELF::R_MICROMIPS_PC18_S3:
635 case ELF::R_MICROMIPS_PC19_S2:
638 // FIXME: Many of these should probably return false but MIPS16 isn't
639 // supported by the integrated assembler.
640 case ELF::R_MIPS16_26:
641 case ELF::R_MIPS16_GPREL:
642 case ELF::R_MIPS16_CALL16:
643 case ELF::R_MIPS16_TLS_GD:
644 case ELF::R_MIPS16_TLS_LDM:
645 case ELF::R_MIPS16_TLS_DTPREL_HI16:
646 case ELF::R_MIPS16_TLS_DTPREL_LO16:
647 case ELF::R_MIPS16_TLS_GOTTPREL:
648 case ELF::R_MIPS16_TLS_TPREL_HI16:
649 case ELF::R_MIPS16_TLS_TPREL_LO16:
650 llvm_unreachable("Unsupported MIPS16 relocation");
655 MCObjectWriter *llvm::createMipsELFObjectWriter(raw_pwrite_stream &OS,
659 MCELFObjectTargetWriter *MOTW =
660 new MipsELFObjectWriter(Is64Bit, OSABI, Is64Bit, IsLittleEndian);
661 return createELFObjectWriter(MOTW, OS, IsLittleEndian);