1 //===-- PPCELFObjectWriter.cpp - PPC 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 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/PPCMCTargetDesc.h"
11 #include "MCTargetDesc/PPCFixupKinds.h"
12 #include "llvm/ADT/STLExtras.h"
13 #include "llvm/MC/MCELFObjectWriter.h"
14 #include "llvm/MC/MCExpr.h"
15 #include "llvm/MC/MCValue.h"
16 #include "llvm/Support/ErrorHandling.h"
21 class PPCELFObjectWriter : public MCELFObjectTargetWriter {
23 PPCELFObjectWriter(bool Is64Bit, uint8_t OSABI);
25 virtual ~PPCELFObjectWriter();
27 virtual unsigned getRelocTypeInner(const MCValue &Target,
30 virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
31 bool IsPCRel, bool IsRelocWithSymbol,
32 int64_t Addend) const;
33 virtual const MCSymbol *undefinedExplicitRelSym(const MCValue &Target,
39 PPCELFObjectWriter::PPCELFObjectWriter(bool Is64Bit, uint8_t OSABI)
40 : MCELFObjectTargetWriter(Is64Bit, OSABI,
41 Is64Bit ? ELF::EM_PPC64 : ELF::EM_PPC,
42 /*HasRelocationAddend*/ true) {}
44 PPCELFObjectWriter::~PPCELFObjectWriter() {
47 unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
51 MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
52 MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
54 // determine the type of the relocation
57 switch ((unsigned)Fixup.getKind()) {
59 llvm_unreachable("Unimplemented");
60 case PPC::fixup_ppc_br24:
61 case PPC::fixup_ppc_br24abs:
62 Type = ELF::R_PPC_REL24;
64 case PPC::fixup_ppc_brcond14:
65 case PPC::fixup_ppc_brcond14abs:
66 Type = ELF::R_PPC_REL14;
68 case PPC::fixup_ppc_half16:
70 default: llvm_unreachable("Unsupported Modifier");
71 case MCSymbolRefExpr::VK_None:
72 Type = ELF::R_PPC_REL16;
74 case MCSymbolRefExpr::VK_PPC_LO:
75 Type = ELF::R_PPC_REL16_LO;
77 case MCSymbolRefExpr::VK_PPC_HI:
78 Type = ELF::R_PPC_REL16_HI;
80 case MCSymbolRefExpr::VK_PPC_HA:
81 Type = ELF::R_PPC_REL16_HA;
87 Type = ELF::R_PPC_REL32;
91 Type = ELF::R_PPC64_REL64;
95 switch ((unsigned)Fixup.getKind()) {
96 default: llvm_unreachable("invalid fixup kind!");
97 case PPC::fixup_ppc_br24abs:
98 Type = ELF::R_PPC_ADDR24;
100 case PPC::fixup_ppc_brcond14abs:
101 Type = ELF::R_PPC_ADDR14; // XXX: or BRNTAKEN?_
103 case PPC::fixup_ppc_half16:
105 default: llvm_unreachable("Unsupported Modifier");
106 case MCSymbolRefExpr::VK_None:
107 Type = ELF::R_PPC_ADDR16;
109 case MCSymbolRefExpr::VK_PPC_LO:
110 Type = ELF::R_PPC_ADDR16_LO;
112 case MCSymbolRefExpr::VK_PPC_HI:
113 Type = ELF::R_PPC_ADDR16_HI;
115 case MCSymbolRefExpr::VK_PPC_HA:
116 Type = ELF::R_PPC_ADDR16_HA;
118 case MCSymbolRefExpr::VK_PPC_HIGHER:
119 Type = ELF::R_PPC64_ADDR16_HIGHER;
121 case MCSymbolRefExpr::VK_PPC_HIGHERA:
122 Type = ELF::R_PPC64_ADDR16_HIGHERA;
124 case MCSymbolRefExpr::VK_PPC_HIGHEST:
125 Type = ELF::R_PPC64_ADDR16_HIGHEST;
127 case MCSymbolRefExpr::VK_PPC_HIGHESTA:
128 Type = ELF::R_PPC64_ADDR16_HIGHESTA;
130 case MCSymbolRefExpr::VK_GOT:
131 Type = ELF::R_PPC_GOT16;
133 case MCSymbolRefExpr::VK_PPC_GOT_LO:
134 Type = ELF::R_PPC_GOT16_LO;
136 case MCSymbolRefExpr::VK_PPC_GOT_HI:
137 Type = ELF::R_PPC_GOT16_HI;
139 case MCSymbolRefExpr::VK_PPC_GOT_HA:
140 Type = ELF::R_PPC_GOT16_HA;
142 case MCSymbolRefExpr::VK_PPC_TOC:
143 Type = ELF::R_PPC64_TOC16;
145 case MCSymbolRefExpr::VK_PPC_TOC_LO:
146 Type = ELF::R_PPC64_TOC16_LO;
148 case MCSymbolRefExpr::VK_PPC_TOC_HI:
149 Type = ELF::R_PPC64_TOC16_HI;
151 case MCSymbolRefExpr::VK_PPC_TOC_HA:
152 Type = ELF::R_PPC64_TOC16_HA;
154 case MCSymbolRefExpr::VK_PPC_TPREL:
155 Type = ELF::R_PPC_TPREL16;
157 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
158 Type = ELF::R_PPC_TPREL16_LO;
160 case MCSymbolRefExpr::VK_PPC_TPREL_HI:
161 Type = ELF::R_PPC_TPREL16_HI;
163 case MCSymbolRefExpr::VK_PPC_TPREL_HA:
164 Type = ELF::R_PPC_TPREL16_HA;
166 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHER:
167 Type = ELF::R_PPC64_TPREL16_HIGHER;
169 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHERA:
170 Type = ELF::R_PPC64_TPREL16_HIGHERA;
172 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHEST:
173 Type = ELF::R_PPC64_TPREL16_HIGHEST;
175 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHESTA:
176 Type = ELF::R_PPC64_TPREL16_HIGHESTA;
178 case MCSymbolRefExpr::VK_PPC_DTPREL:
179 Type = ELF::R_PPC64_DTPREL16;
181 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
182 Type = ELF::R_PPC64_DTPREL16_LO;
184 case MCSymbolRefExpr::VK_PPC_DTPREL_HI:
185 Type = ELF::R_PPC64_DTPREL16_HI;
187 case MCSymbolRefExpr::VK_PPC_DTPREL_HA:
188 Type = ELF::R_PPC64_DTPREL16_HA;
190 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHER:
191 Type = ELF::R_PPC64_DTPREL16_HIGHER;
193 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHERA:
194 Type = ELF::R_PPC64_DTPREL16_HIGHERA;
196 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHEST:
197 Type = ELF::R_PPC64_DTPREL16_HIGHEST;
199 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHESTA:
200 Type = ELF::R_PPC64_DTPREL16_HIGHESTA;
202 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD:
203 Type = ELF::R_PPC64_GOT_TLSGD16;
205 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO:
206 Type = ELF::R_PPC64_GOT_TLSGD16_LO;
208 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HI:
209 Type = ELF::R_PPC64_GOT_TLSGD16_HI;
211 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA:
212 Type = ELF::R_PPC64_GOT_TLSGD16_HA;
214 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD:
215 Type = ELF::R_PPC64_GOT_TLSLD16;
217 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO:
218 Type = ELF::R_PPC64_GOT_TLSLD16_LO;
220 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HI:
221 Type = ELF::R_PPC64_GOT_TLSLD16_HI;
223 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA:
224 Type = ELF::R_PPC64_GOT_TLSLD16_HA;
226 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HI:
227 Type = ELF::R_PPC64_GOT_TPREL16_HI;
229 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA:
230 Type = ELF::R_PPC64_GOT_TPREL16_HA;
232 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HI:
233 Type = ELF::R_PPC64_GOT_DTPREL16_HI;
235 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HA:
236 Type = ELF::R_PPC64_GOT_DTPREL16_HA;
240 case PPC::fixup_ppc_half16ds:
242 default: llvm_unreachable("Unsupported Modifier");
243 case MCSymbolRefExpr::VK_None:
244 Type = ELF::R_PPC64_ADDR16_DS;
246 case MCSymbolRefExpr::VK_PPC_LO:
247 Type = ELF::R_PPC64_ADDR16_LO_DS;
249 case MCSymbolRefExpr::VK_GOT:
250 Type = ELF::R_PPC64_GOT16_DS;
252 case MCSymbolRefExpr::VK_PPC_GOT_LO:
253 Type = ELF::R_PPC64_GOT16_LO_DS;
255 case MCSymbolRefExpr::VK_PPC_TOC:
256 Type = ELF::R_PPC64_TOC16_DS;
258 case MCSymbolRefExpr::VK_PPC_TOC_LO:
259 Type = ELF::R_PPC64_TOC16_LO_DS;
261 case MCSymbolRefExpr::VK_PPC_TPREL:
262 Type = ELF::R_PPC64_TPREL16_DS;
264 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
265 Type = ELF::R_PPC64_TPREL16_LO_DS;
267 case MCSymbolRefExpr::VK_PPC_DTPREL:
268 Type = ELF::R_PPC64_DTPREL16_DS;
270 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
271 Type = ELF::R_PPC64_DTPREL16_LO_DS;
273 case MCSymbolRefExpr::VK_PPC_GOT_TPREL:
274 Type = ELF::R_PPC64_GOT_TPREL16_DS;
276 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO:
277 Type = ELF::R_PPC64_GOT_TPREL16_LO_DS;
279 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL:
280 Type = ELF::R_PPC64_GOT_DTPREL16_DS;
282 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO:
283 Type = ELF::R_PPC64_GOT_DTPREL16_LO_DS;
287 case PPC::fixup_ppc_tlsreg:
288 Type = ELF::R_PPC64_TLS;
290 case PPC::fixup_ppc_nofixup:
292 default: llvm_unreachable("Unsupported Modifier");
293 case MCSymbolRefExpr::VK_PPC_TLSGD:
294 Type = ELF::R_PPC64_TLSGD;
296 case MCSymbolRefExpr::VK_PPC_TLSLD:
297 Type = ELF::R_PPC64_TLSLD;
303 default: llvm_unreachable("Unsupported Modifier");
304 case MCSymbolRefExpr::VK_PPC_TOCBASE:
305 Type = ELF::R_PPC64_TOC;
307 case MCSymbolRefExpr::VK_None:
308 Type = ELF::R_PPC64_ADDR64;
313 Type = ELF::R_PPC_ADDR32;
316 Type = ELF::R_PPC_ADDR16;
323 unsigned PPCELFObjectWriter::GetRelocType(const MCValue &Target,
324 const MCFixup &Fixup,
326 bool IsRelocWithSymbol,
327 int64_t Addend) const {
328 return getRelocTypeInner(Target, Fixup, IsPCRel);
331 const MCSymbol *PPCELFObjectWriter::undefinedExplicitRelSym(const MCValue &Target,
332 const MCFixup &Fixup,
333 bool IsPCRel) const {
334 assert(Target.getSymA() && "SymA cannot be 0");
335 const MCSymbol &Symbol = Target.getSymA()->getSymbol().AliasedSymbol();
337 unsigned RelocType = getRelocTypeInner(Target, Fixup, IsPCRel);
339 // The .odp creation emits a relocation against the symbol ".TOC." which
340 // create a R_PPC64_TOC relocation. However the relocation symbol name
341 // in final object creation should be NULL, since the symbol does not
342 // really exist, it is just the reference to TOC base for the current
344 bool EmitThisSym = RelocType != ELF::R_PPC64_TOC;
346 if (EmitThisSym && !Symbol.isTemporary())
351 MCObjectWriter *llvm::createPPCELFObjectWriter(raw_ostream &OS,
354 MCELFObjectTargetWriter *MOTW = new PPCELFObjectWriter(Is64Bit, OSABI);
355 return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false);