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 "MCTargetDesc/PPCMCExpr.h"
13 #include "llvm/ADT/STLExtras.h"
14 #include "llvm/MC/MCELFObjectWriter.h"
15 #include "llvm/MC/MCExpr.h"
16 #include "llvm/MC/MCValue.h"
17 #include "llvm/Support/ErrorHandling.h"
22 class PPCELFObjectWriter : public MCELFObjectTargetWriter {
24 PPCELFObjectWriter(bool Is64Bit, uint8_t OSABI);
26 virtual ~PPCELFObjectWriter();
28 virtual unsigned getRelocTypeInner(const MCValue &Target,
31 unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
32 bool IsPCRel) const override;
36 PPCELFObjectWriter::PPCELFObjectWriter(bool Is64Bit, uint8_t OSABI)
37 : MCELFObjectTargetWriter(Is64Bit, OSABI,
38 Is64Bit ? ELF::EM_PPC64 : ELF::EM_PPC,
39 /*HasRelocationAddend*/ true) {}
41 PPCELFObjectWriter::~PPCELFObjectWriter() {
44 static MCSymbolRefExpr::VariantKind getAccessVariant(const MCFixup &Fixup) {
45 const MCExpr *Expr = Fixup.getValue();
47 if (Expr->getKind() != MCExpr::Target)
48 return Fixup.getAccessVariant();
50 switch (cast<PPCMCExpr>(Expr)->getKind()) {
51 case PPCMCExpr::VK_PPC_None:
52 return MCSymbolRefExpr::VK_None;
53 case PPCMCExpr::VK_PPC_LO:
54 return MCSymbolRefExpr::VK_PPC_LO;
55 case PPCMCExpr::VK_PPC_HI:
56 return MCSymbolRefExpr::VK_PPC_HI;
57 case PPCMCExpr::VK_PPC_HA:
58 return MCSymbolRefExpr::VK_PPC_HA;
59 case PPCMCExpr::VK_PPC_HIGHERA:
60 return MCSymbolRefExpr::VK_PPC_HIGHERA;
61 case PPCMCExpr::VK_PPC_HIGHER:
62 return MCSymbolRefExpr::VK_PPC_HIGHER;
63 case PPCMCExpr::VK_PPC_HIGHEST:
64 return MCSymbolRefExpr::VK_PPC_HIGHEST;
65 case PPCMCExpr::VK_PPC_HIGHESTA:
66 return MCSymbolRefExpr::VK_PPC_HIGHESTA;
68 llvm_unreachable("unknown PPCMCExpr kind");
71 unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
75 MCSymbolRefExpr::VariantKind Modifier = getAccessVariant(Fixup);
77 // determine the type of the relocation
80 switch ((unsigned)Fixup.getKind()) {
82 llvm_unreachable("Unimplemented");
83 case PPC::fixup_ppc_br24:
84 case PPC::fixup_ppc_br24abs:
85 Type = ELF::R_PPC_REL24;
87 case PPC::fixup_ppc_brcond14:
88 case PPC::fixup_ppc_brcond14abs:
89 Type = ELF::R_PPC_REL14;
91 case PPC::fixup_ppc_half16:
93 default: llvm_unreachable("Unsupported Modifier");
94 case MCSymbolRefExpr::VK_None:
95 Type = ELF::R_PPC_REL16;
97 case MCSymbolRefExpr::VK_PPC_LO:
98 Type = ELF::R_PPC_REL16_LO;
100 case MCSymbolRefExpr::VK_PPC_HI:
101 Type = ELF::R_PPC_REL16_HI;
103 case MCSymbolRefExpr::VK_PPC_HA:
104 Type = ELF::R_PPC_REL16_HA;
110 Type = ELF::R_PPC_REL32;
114 Type = ELF::R_PPC64_REL64;
118 switch ((unsigned)Fixup.getKind()) {
119 default: llvm_unreachable("invalid fixup kind!");
120 case PPC::fixup_ppc_br24abs:
121 Type = ELF::R_PPC_ADDR24;
123 case PPC::fixup_ppc_brcond14abs:
124 Type = ELF::R_PPC_ADDR14; // XXX: or BRNTAKEN?_
126 case PPC::fixup_ppc_half16:
128 default: llvm_unreachable("Unsupported Modifier");
129 case MCSymbolRefExpr::VK_None:
130 Type = ELF::R_PPC_ADDR16;
132 case MCSymbolRefExpr::VK_PPC_LO:
133 Type = ELF::R_PPC_ADDR16_LO;
135 case MCSymbolRefExpr::VK_PPC_HI:
136 Type = ELF::R_PPC_ADDR16_HI;
138 case MCSymbolRefExpr::VK_PPC_HA:
139 Type = ELF::R_PPC_ADDR16_HA;
141 case MCSymbolRefExpr::VK_PPC_HIGHER:
142 Type = ELF::R_PPC64_ADDR16_HIGHER;
144 case MCSymbolRefExpr::VK_PPC_HIGHERA:
145 Type = ELF::R_PPC64_ADDR16_HIGHERA;
147 case MCSymbolRefExpr::VK_PPC_HIGHEST:
148 Type = ELF::R_PPC64_ADDR16_HIGHEST;
150 case MCSymbolRefExpr::VK_PPC_HIGHESTA:
151 Type = ELF::R_PPC64_ADDR16_HIGHESTA;
153 case MCSymbolRefExpr::VK_GOT:
154 Type = ELF::R_PPC_GOT16;
156 case MCSymbolRefExpr::VK_PPC_GOT_LO:
157 Type = ELF::R_PPC_GOT16_LO;
159 case MCSymbolRefExpr::VK_PPC_GOT_HI:
160 Type = ELF::R_PPC_GOT16_HI;
162 case MCSymbolRefExpr::VK_PPC_GOT_HA:
163 Type = ELF::R_PPC_GOT16_HA;
165 case MCSymbolRefExpr::VK_PPC_TOC:
166 Type = ELF::R_PPC64_TOC16;
168 case MCSymbolRefExpr::VK_PPC_TOC_LO:
169 Type = ELF::R_PPC64_TOC16_LO;
171 case MCSymbolRefExpr::VK_PPC_TOC_HI:
172 Type = ELF::R_PPC64_TOC16_HI;
174 case MCSymbolRefExpr::VK_PPC_TOC_HA:
175 Type = ELF::R_PPC64_TOC16_HA;
177 case MCSymbolRefExpr::VK_PPC_TPREL:
178 Type = ELF::R_PPC_TPREL16;
180 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
181 Type = ELF::R_PPC_TPREL16_LO;
183 case MCSymbolRefExpr::VK_PPC_TPREL_HI:
184 Type = ELF::R_PPC_TPREL16_HI;
186 case MCSymbolRefExpr::VK_PPC_TPREL_HA:
187 Type = ELF::R_PPC_TPREL16_HA;
189 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHER:
190 Type = ELF::R_PPC64_TPREL16_HIGHER;
192 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHERA:
193 Type = ELF::R_PPC64_TPREL16_HIGHERA;
195 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHEST:
196 Type = ELF::R_PPC64_TPREL16_HIGHEST;
198 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHESTA:
199 Type = ELF::R_PPC64_TPREL16_HIGHESTA;
201 case MCSymbolRefExpr::VK_PPC_DTPREL:
202 Type = ELF::R_PPC64_DTPREL16;
204 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
205 Type = ELF::R_PPC64_DTPREL16_LO;
207 case MCSymbolRefExpr::VK_PPC_DTPREL_HI:
208 Type = ELF::R_PPC64_DTPREL16_HI;
210 case MCSymbolRefExpr::VK_PPC_DTPREL_HA:
211 Type = ELF::R_PPC64_DTPREL16_HA;
213 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHER:
214 Type = ELF::R_PPC64_DTPREL16_HIGHER;
216 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHERA:
217 Type = ELF::R_PPC64_DTPREL16_HIGHERA;
219 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHEST:
220 Type = ELF::R_PPC64_DTPREL16_HIGHEST;
222 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHESTA:
223 Type = ELF::R_PPC64_DTPREL16_HIGHESTA;
225 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD:
226 Type = ELF::R_PPC64_GOT_TLSGD16;
228 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO:
229 Type = ELF::R_PPC64_GOT_TLSGD16_LO;
231 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HI:
232 Type = ELF::R_PPC64_GOT_TLSGD16_HI;
234 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA:
235 Type = ELF::R_PPC64_GOT_TLSGD16_HA;
237 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD:
238 Type = ELF::R_PPC64_GOT_TLSLD16;
240 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO:
241 Type = ELF::R_PPC64_GOT_TLSLD16_LO;
243 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HI:
244 Type = ELF::R_PPC64_GOT_TLSLD16_HI;
246 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA:
247 Type = ELF::R_PPC64_GOT_TLSLD16_HA;
249 case MCSymbolRefExpr::VK_PPC_GOT_TPREL:
250 /* We don't have R_PPC64_GOT_TPREL16, but since GOT offsets
251 are always 4-aligned, we can use R_PPC64_GOT_TPREL16_DS. */
252 Type = ELF::R_PPC64_GOT_TPREL16_DS;
254 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO:
255 /* We don't have R_PPC64_GOT_TPREL16_LO, but since GOT offsets
256 are always 4-aligned, we can use R_PPC64_GOT_TPREL16_LO_DS. */
257 Type = ELF::R_PPC64_GOT_TPREL16_LO_DS;
259 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HI:
260 Type = ELF::R_PPC64_GOT_TPREL16_HI;
262 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL:
263 /* We don't have R_PPC64_GOT_DTPREL16, but since GOT offsets
264 are always 4-aligned, we can use R_PPC64_GOT_DTPREL16_DS. */
265 Type = ELF::R_PPC64_GOT_DTPREL16_DS;
267 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO:
268 /* We don't have R_PPC64_GOT_DTPREL16_LO, but since GOT offsets
269 are always 4-aligned, we can use R_PPC64_GOT_DTPREL16_LO_DS. */
270 Type = ELF::R_PPC64_GOT_DTPREL16_LO_DS;
272 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA:
273 Type = ELF::R_PPC64_GOT_TPREL16_HA;
275 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HI:
276 Type = ELF::R_PPC64_GOT_DTPREL16_HI;
278 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HA:
279 Type = ELF::R_PPC64_GOT_DTPREL16_HA;
283 case PPC::fixup_ppc_half16ds:
285 default: llvm_unreachable("Unsupported Modifier");
286 case MCSymbolRefExpr::VK_None:
287 Type = ELF::R_PPC64_ADDR16_DS;
289 case MCSymbolRefExpr::VK_PPC_LO:
290 Type = ELF::R_PPC64_ADDR16_LO_DS;
292 case MCSymbolRefExpr::VK_GOT:
293 Type = ELF::R_PPC64_GOT16_DS;
295 case MCSymbolRefExpr::VK_PPC_GOT_LO:
296 Type = ELF::R_PPC64_GOT16_LO_DS;
298 case MCSymbolRefExpr::VK_PPC_TOC:
299 Type = ELF::R_PPC64_TOC16_DS;
301 case MCSymbolRefExpr::VK_PPC_TOC_LO:
302 Type = ELF::R_PPC64_TOC16_LO_DS;
304 case MCSymbolRefExpr::VK_PPC_TPREL:
305 Type = ELF::R_PPC64_TPREL16_DS;
307 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
308 Type = ELF::R_PPC64_TPREL16_LO_DS;
310 case MCSymbolRefExpr::VK_PPC_DTPREL:
311 Type = ELF::R_PPC64_DTPREL16_DS;
313 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
314 Type = ELF::R_PPC64_DTPREL16_LO_DS;
316 case MCSymbolRefExpr::VK_PPC_GOT_TPREL:
317 Type = ELF::R_PPC64_GOT_TPREL16_DS;
319 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO:
320 Type = ELF::R_PPC64_GOT_TPREL16_LO_DS;
322 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL:
323 Type = ELF::R_PPC64_GOT_DTPREL16_DS;
325 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO:
326 Type = ELF::R_PPC64_GOT_DTPREL16_LO_DS;
330 case PPC::fixup_ppc_nofixup:
332 default: llvm_unreachable("Unsupported Modifier");
333 case MCSymbolRefExpr::VK_PPC_TLSGD:
334 Type = ELF::R_PPC64_TLSGD;
336 case MCSymbolRefExpr::VK_PPC_TLSLD:
337 Type = ELF::R_PPC64_TLSLD;
339 case MCSymbolRefExpr::VK_PPC_TLS:
340 Type = ELF::R_PPC64_TLS;
346 default: llvm_unreachable("Unsupported Modifier");
347 case MCSymbolRefExpr::VK_PPC_TOCBASE:
348 Type = ELF::R_PPC64_TOC;
350 case MCSymbolRefExpr::VK_None:
351 Type = ELF::R_PPC64_ADDR64;
353 case MCSymbolRefExpr::VK_PPC_DTPMOD:
354 Type = ELF::R_PPC64_DTPMOD64;
356 case MCSymbolRefExpr::VK_PPC_TPREL:
357 Type = ELF::R_PPC64_TPREL64;
359 case MCSymbolRefExpr::VK_PPC_DTPREL:
360 Type = ELF::R_PPC64_DTPREL64;
365 Type = ELF::R_PPC_ADDR32;
368 Type = ELF::R_PPC_ADDR16;
375 unsigned PPCELFObjectWriter::GetRelocType(const MCValue &Target,
376 const MCFixup &Fixup,
377 bool IsPCRel) const {
378 return getRelocTypeInner(Target, Fixup, IsPCRel);
381 MCObjectWriter *llvm::createPPCELFObjectWriter(raw_ostream &OS,
385 MCELFObjectTargetWriter *MOTW = new PPCELFObjectWriter(Is64Bit, OSABI);
386 return createELFObjectWriter(MOTW, OS, IsLittleEndian);