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gerrit-public.fairphone.software / toolchain / llvm-project / 876a0d0133f6d9fe801f368635fd4c20032f3f9e / . / llvm / lib / Target / PowerPC / MCTargetDesc / PPCELFObjectWriter.cpp
blob: 0155a89945d3fc5caea4b512d661e350bc981ad3 [file] [log] [blame]
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]1//===-- PPCELFObjectWriter.cpp - PPC ELF Writer ---------------------------===//
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
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]10#include "MCTargetDesc/PPCMCTargetDesc.h"
Chandler Carruthed0881b2012-12-03 16:50:05 +0000[diff] [blame]11#include "MCTargetDesc/PPCFixupKinds.h"
Bill Schmidta4f89842012-12-14 20:28:38 +0000[diff] [blame]12#include "llvm/ADT/STLExtras.h"
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]13#include "llvm/MC/MCELFObjectWriter.h"
Adhemerval Zanellaf2aceda2012-10-25 12:27:42 +0000[diff] [blame]14#include "llvm/MC/MCExpr.h"
15#include "llvm/MC/MCValue.h"
Chandler Carruthed0881b2012-12-03 16:50:05 +0000[diff] [blame]16#include "llvm/Support/ErrorHandling.h"
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]17
18using namespace llvm;
19
20namespace {
21 class PPCELFObjectWriter : public MCELFObjectTargetWriter {
22 public:
23 PPCELFObjectWriter(bool Is64Bit, uint8_t OSABI);
24
25 virtual ~PPCELFObjectWriter();
26 protected:
Adhemerval Zanellaf2aceda2012-10-25 12:27:42 +0000[diff] [blame]27 virtual unsigned getRelocTypeInner(const MCValue &Target,
28 const MCFixup &Fixup,
29 bool IsPCRel) const;
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]30 virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
31 bool IsPCRel, bool IsRelocWithSymbol,
32 int64_t Addend) const;
Adhemerval Zanellaf2aceda2012-10-25 12:27:42 +0000[diff] [blame]33 virtual const MCSymbol *undefinedExplicitRelSym(const MCValue &Target,
34 const MCFixup &Fixup,
35 bool IsPCRel) const;
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]36 };
37}
38
39PPCELFObjectWriter::PPCELFObjectWriter(bool Is64Bit, uint8_t OSABI)
40 : MCELFObjectTargetWriter(Is64Bit, OSABI,
41 Is64Bit ? ELF::EM_PPC64 : ELF::EM_PPC,
Rafael Espindola25009622011-12-22 18:38:06 +0000[diff] [blame]42 /*HasRelocationAddend*/ true) {}
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]43
44PPCELFObjectWriter::~PPCELFObjectWriter() {
45}
46
Adhemerval Zanellaf2aceda2012-10-25 12:27:42 +0000[diff] [blame]47unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
48 const MCFixup &Fixup,
49 bool IsPCRel) const
50{
51 MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
52 MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
53
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]54 // determine the type of the relocation
55 unsigned Type;
56 if (IsPCRel) {
57 switch ((unsigned)Fixup.getKind()) {
58 default:
59 llvm_unreachable("Unimplemented");
60 case PPC::fixup_ppc_br24:
61 Type = ELF::R_PPC_REL24;
62 break;
Ulrich Weigand72a7dc02013-04-26 15:38:30 +0000[diff] [blame]63 case PPC::fixup_ppc_brcond14:
64 Type = ELF::R_PPC_REL14;
65 break;
Adhemerval Zanella9b0b7812013-01-04 19:08:13 +0000[diff] [blame]66 case FK_Data_4:
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]67 case FK_PCRel_4:
68 Type = ELF::R_PPC_REL32;
69 break;
Adhemerval Zanella9b0b7812013-01-04 19:08:13 +0000[diff] [blame]70 case FK_Data_8:
71 case FK_PCRel_8:
72 Type = ELF::R_PPC64_REL64;
73 break;
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]74 }
75 } else {
76 switch ((unsigned)Fixup.getKind()) {
77 default: llvm_unreachable("invalid fixup kind!");
78 case PPC::fixup_ppc_br24:
79 Type = ELF::R_PPC_ADDR24;
80 break;
81 case PPC::fixup_ppc_brcond14:
Adhemerval Zanellaf2aceda2012-10-25 12:27:42 +0000[diff] [blame]82 Type = ELF::R_PPC_ADDR14; // XXX: or BRNTAKEN?_
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]83 break;
Ulrich Weigand6e23ac62013-05-17 12:37:21 +0000[diff] [blame]84 case PPC::fixup_ppc_half16:
Ulrich Weigand85578502012-11-13 19:24:36 +0000[diff] [blame]85 switch (Modifier) {
86 default: llvm_unreachable("Unsupported Modifier");
Ulrich Weigand85578502012-11-13 19:24:36 +0000[diff] [blame]87 case MCSymbolRefExpr::VK_None:
Ulrich Weigande4620532013-05-08 17:50:07 +0000[diff] [blame]88 Type = ELF::R_PPC_ADDR16;
89 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]90 case MCSymbolRefExpr::VK_PPC_LO:
Ulrich Weigand85578502012-11-13 19:24:36 +0000[diff] [blame]91 Type = ELF::R_PPC_ADDR16_LO;
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]92 break;
Ulrich Weigande67c5652013-06-21 14:42:49 +0000[diff] [blame]93 case MCSymbolRefExpr::VK_PPC_HI:
94 Type = ELF::R_PPC_ADDR16_HI;
95 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]96 case MCSymbolRefExpr::VK_PPC_HA:
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]97 Type = ELF::R_PPC_ADDR16_HA;
98 break;
Ulrich Weigande9126f52013-06-21 14:43:42 +0000[diff] [blame]99 case MCSymbolRefExpr::VK_PPC_HIGHER:
100 Type = ELF::R_PPC64_ADDR16_HIGHER;
101 break;
102 case MCSymbolRefExpr::VK_PPC_HIGHERA:
103 Type = ELF::R_PPC64_ADDR16_HIGHERA;
104 break;
105 case MCSymbolRefExpr::VK_PPC_HIGHEST:
106 Type = ELF::R_PPC64_ADDR16_HIGHEST;
107 break;
108 case MCSymbolRefExpr::VK_PPC_HIGHESTA:
109 Type = ELF::R_PPC64_ADDR16_HIGHESTA;
110 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]111 case MCSymbolRefExpr::VK_PPC_TOC:
Ulrich Weigand3e186012013-03-26 10:56:47 +0000[diff] [blame]112 Type = ELF::R_PPC64_TOC16;
113 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]114 case MCSymbolRefExpr::VK_PPC_TOC_LO:
Bill Schmidt34627e32012-11-27 17:35:46 +0000[diff] [blame]115 Type = ELF::R_PPC64_TOC16_LO;
116 break;
Ulrich Weigand72ddbd62013-06-21 14:43:10 +0000[diff] [blame]117 case MCSymbolRefExpr::VK_PPC_TOC_HI:
118 Type = ELF::R_PPC64_TOC16_HI;
119 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]120 case MCSymbolRefExpr::VK_PPC_TOC_HA:
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]121 Type = ELF::R_PPC64_TOC16_HA;
122 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]123 case MCSymbolRefExpr::VK_PPC_TPREL:
124 Type = ELF::R_PPC_TPREL16;
125 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]126 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]127 Type = ELF::R_PPC_TPREL16_LO;
128 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]129 case MCSymbolRefExpr::VK_PPC_TPREL_HI:
130 Type = ELF::R_PPC_TPREL16_HI;
131 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]132 case MCSymbolRefExpr::VK_PPC_TPREL_HA:
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]133 Type = ELF::R_PPC_TPREL16_HA;
134 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]135 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHER:
136 Type = ELF::R_PPC64_TPREL16_HIGHER;
137 break;
138 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHERA:
139 Type = ELF::R_PPC64_TPREL16_HIGHERA;
140 break;
141 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHEST:
142 Type = ELF::R_PPC64_TPREL16_HIGHEST;
143 break;
144 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHESTA:
145 Type = ELF::R_PPC64_TPREL16_HIGHESTA;
146 break;
147 case MCSymbolRefExpr::VK_PPC_DTPREL:
148 Type = ELF::R_PPC64_DTPREL16;
149 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]150 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]151 Type = ELF::R_PPC64_DTPREL16_LO;
152 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]153 case MCSymbolRefExpr::VK_PPC_DTPREL_HI:
154 Type = ELF::R_PPC64_DTPREL16_HI;
155 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]156 case MCSymbolRefExpr::VK_PPC_DTPREL_HA:
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]157 Type = ELF::R_PPC64_DTPREL16_HA;
158 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]159 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHER:
160 Type = ELF::R_PPC64_DTPREL16_HIGHER;
161 break;
162 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHERA:
163 Type = ELF::R_PPC64_DTPREL16_HIGHERA;
164 break;
165 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHEST:
166 Type = ELF::R_PPC64_DTPREL16_HIGHEST;
167 break;
168 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHESTA:
169 Type = ELF::R_PPC64_DTPREL16_HIGHESTA;
170 break;
171 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD:
172 Type = ELF::R_PPC64_GOT_TLSGD16;
173 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]174 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO:
Bill Schmidtc56f1d32012-12-11 20:30:11 +0000[diff] [blame]175 Type = ELF::R_PPC64_GOT_TLSGD16_LO;
176 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]177 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HI:
178 Type = ELF::R_PPC64_GOT_TLSGD16_HI;
179 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]180 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA:
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]181 Type = ELF::R_PPC64_GOT_TLSGD16_HA;
182 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]183 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD:
184 Type = ELF::R_PPC64_GOT_TLSLD16;
185 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]186 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO:
Bill Schmidt24b8dd62012-12-12 19:29:35 +0000[diff] [blame]187 Type = ELF::R_PPC64_GOT_TLSLD16_LO;
188 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]189 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HI:
190 Type = ELF::R_PPC64_GOT_TLSLD16_HI;
191 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]192 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA:
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]193 Type = ELF::R_PPC64_GOT_TLSLD16_HA;
194 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]195 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HI:
196 Type = ELF::R_PPC64_GOT_TPREL16_HI;
197 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]198 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA:
Ulrich Weigand9e90b3c2013-06-20 22:04:40 +0000[diff] [blame]199 Type = ELF::R_PPC64_GOT_TPREL16_HA;
200 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]201 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HI:
202 Type = ELF::R_PPC64_GOT_DTPREL16_HI;
203 break;
204 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HA:
205 Type = ELF::R_PPC64_GOT_DTPREL16_HA;
206 break;
Ulrich Weigand85578502012-11-13 19:24:36 +0000[diff] [blame]207 }
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]208 break;
Ulrich Weigand6e23ac62013-05-17 12:37:21 +0000[diff] [blame]209 case PPC::fixup_ppc_half16ds:
Bill Schmidt3822ef22013-02-21 00:05:29 +0000[diff] [blame]210 switch (Modifier) {
211 default: llvm_unreachable("Unsupported Modifier");
Bill Schmidt3822ef22013-02-21 00:05:29 +0000[diff] [blame]212 case MCSymbolRefExpr::VK_None:
Ulrich Weigand3e186012013-03-26 10:56:47 +0000[diff] [blame]213 Type = ELF::R_PPC64_ADDR16_DS;
Bill Schmidt3822ef22013-02-21 00:05:29 +0000[diff] [blame]214 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]215 case MCSymbolRefExpr::VK_PPC_LO:
Ulrich Weigande4620532013-05-08 17:50:07 +0000[diff] [blame]216 Type = ELF::R_PPC64_ADDR16_LO_DS;
217 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]218 case MCSymbolRefExpr::VK_PPC_TOC:
Bill Schmidt34627e32012-11-27 17:35:46 +0000[diff] [blame]219 Type = ELF::R_PPC64_TOC16_DS;
220 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]221 case MCSymbolRefExpr::VK_PPC_TOC_LO:
Bill Schmidt34627e32012-11-27 17:35:46 +0000[diff] [blame]222 Type = ELF::R_PPC64_TOC16_LO_DS;
223 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]224 case MCSymbolRefExpr::VK_PPC_TPREL:
225 Type = ELF::R_PPC64_TPREL16_DS;
226 break;
227 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
228 Type = ELF::R_PPC64_TPREL16_LO_DS;
229 break;
230 case MCSymbolRefExpr::VK_PPC_DTPREL:
231 Type = ELF::R_PPC64_DTPREL16_DS;
232 break;
233 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
234 Type = ELF::R_PPC64_DTPREL16_LO_DS;
235 break;
236 case MCSymbolRefExpr::VK_PPC_GOT_TPREL:
237 Type = ELF::R_PPC64_GOT_TPREL16_DS;
238 break;
Ulrich Weigandd51c09f2013-06-21 14:42:20 +0000[diff] [blame]239 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO:
Bill Schmidt9f0b4ec2012-12-14 17:02:38 +0000[diff] [blame]240 Type = ELF::R_PPC64_GOT_TPREL16_LO_DS;
Bill Schmidtca4a0c92012-12-04 16:18:08 +0000[diff] [blame]241 break;
Ulrich Weigand876a0d02013-06-21 14:44:15 +0000[diff] [blame^]242 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL:
243 Type = ELF::R_PPC64_GOT_DTPREL16_DS;
244 break;
245 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO:
246 Type = ELF::R_PPC64_GOT_DTPREL16_LO_DS;
247 break;
Bill Schmidt34627e32012-11-27 17:35:46 +0000[diff] [blame]248 }
Adhemerval Zanellaf2aceda2012-10-25 12:27:42 +0000[diff] [blame]249 break;
Bill Schmidtca4a0c92012-12-04 16:18:08 +0000[diff] [blame]250 case PPC::fixup_ppc_tlsreg:
251 Type = ELF::R_PPC64_TLS;
252 break;
Bill Schmidt24b8dd62012-12-12 19:29:35 +0000[diff] [blame]253 case PPC::fixup_ppc_nofixup:
254 switch (Modifier) {
255 default: llvm_unreachable("Unsupported Modifier");
256 case MCSymbolRefExpr::VK_PPC_TLSGD:
257 Type = ELF::R_PPC64_TLSGD;
258 break;
259 case MCSymbolRefExpr::VK_PPC_TLSLD:
260 Type = ELF::R_PPC64_TLSLD;
261 break;
262 }
Bill Schmidtc56f1d32012-12-11 20:30:11 +0000[diff] [blame]263 break;
Adhemerval Zanellaf2aceda2012-10-25 12:27:42 +0000[diff] [blame]264 case FK_Data_8:
265 switch (Modifier) {
266 default: llvm_unreachable("Unsupported Modifier");
Ulrich Weigand68e2e1b2013-06-20 22:39:42 +0000[diff] [blame]267 case MCSymbolRefExpr::VK_PPC_TOCBASE:
Adhemerval Zanellaf2aceda2012-10-25 12:27:42 +0000[diff] [blame]268 Type = ELF::R_PPC64_TOC;
269 break;
270 case MCSymbolRefExpr::VK_None:
271 Type = ELF::R_PPC64_ADDR64;
272 break;
273 }
274 break;
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]275 case FK_Data_4:
276 Type = ELF::R_PPC_ADDR32;
277 break;
278 case FK_Data_2:
279 Type = ELF::R_PPC_ADDR16;
280 break;
281 }
282 }
283 return Type;
284}
285
Adhemerval Zanellaf2aceda2012-10-25 12:27:42 +0000[diff] [blame]286unsigned PPCELFObjectWriter::GetRelocType(const MCValue &Target,
287 const MCFixup &Fixup,
288 bool IsPCRel,
289 bool IsRelocWithSymbol,
290 int64_t Addend) const {
291 return getRelocTypeInner(Target, Fixup, IsPCRel);
292}
293
294const MCSymbol *PPCELFObjectWriter::undefinedExplicitRelSym(const MCValue &Target,
295 const MCFixup &Fixup,
296 bool IsPCRel) const {
297 assert(Target.getSymA() && "SymA cannot be 0");
298 const MCSymbol &Symbol = Target.getSymA()->getSymbol().AliasedSymbol();
299
300 unsigned RelocType = getRelocTypeInner(Target, Fixup, IsPCRel);
301
302 // The .odp creation emits a relocation against the symbol ".TOC." which
303 // create a R_PPC64_TOC relocation. However the relocation symbol name
304 // in final object creation should be NULL, since the symbol does not
305 // really exist, it is just the reference to TOC base for the current
306 // object file.
307 bool EmitThisSym = RelocType != ELF::R_PPC64_TOC;
308
309 if (EmitThisSym && !Symbol.isTemporary())
310 return &Symbol;
311 return NULL;
312}
313
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]314MCObjectWriter *llvm::createPPCELFObjectWriter(raw_ostream &OS,
315 bool Is64Bit,
316 uint8_t OSABI) {
317 MCELFObjectTargetWriter *MOTW = new PPCELFObjectWriter(Is64Bit, OSABI);
Rafael Espindola25009622011-12-22 18:38:06 +0000[diff] [blame]318 return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false);
Rafael Espindola38a400d2011-12-22 01:57:09 +0000[diff] [blame]319}