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 MCValue &Target,
45 const MCFixup &Fixup) {
46 const MCExpr *Expr = Fixup.getValue();
48 if (Expr->getKind() != MCExpr::Target)
49 return Target.getAccessVariant();
51 switch (cast<PPCMCExpr>(Expr)->getKind()) {
52 case PPCMCExpr::VK_PPC_None:
53 return MCSymbolRefExpr::VK_None;
54 case PPCMCExpr::VK_PPC_LO:
55 return MCSymbolRefExpr::VK_PPC_LO;
56 case PPCMCExpr::VK_PPC_HI:
57 return MCSymbolRefExpr::VK_PPC_HI;
58 case PPCMCExpr::VK_PPC_HA:
59 return MCSymbolRefExpr::VK_PPC_HA;
60 case PPCMCExpr::VK_PPC_HIGHERA:
61 return MCSymbolRefExpr::VK_PPC_HIGHERA;
62 case PPCMCExpr::VK_PPC_HIGHER:
63 return MCSymbolRefExpr::VK_PPC_HIGHER;
64 case PPCMCExpr::VK_PPC_HIGHEST:
65 return MCSymbolRefExpr::VK_PPC_HIGHEST;
66 case PPCMCExpr::VK_PPC_HIGHESTA:
67 return MCSymbolRefExpr::VK_PPC_HIGHESTA;
69 llvm_unreachable("unknown PPCMCExpr kind");
72 unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
76 MCSymbolRefExpr::VariantKind Modifier = getAccessVariant(Target, Fixup);
78 // determine the type of the relocation
81 switch ((unsigned)Fixup.getKind()) {
83 llvm_unreachable("Unimplemented");
84 case PPC::fixup_ppc_br24:
85 case PPC::fixup_ppc_br24abs:
87 default: llvm_unreachable("Unsupported Modifier");
88 case MCSymbolRefExpr::VK_None:
89 Type = ELF::R_PPC_REL24;
91 case MCSymbolRefExpr::VK_PLT:
92 Type = ELF::R_PPC_PLTREL24;
96 case PPC::fixup_ppc_brcond14:
97 case PPC::fixup_ppc_brcond14abs:
98 Type = ELF::R_PPC_REL14;
100 case PPC::fixup_ppc_half16:
102 default: llvm_unreachable("Unsupported Modifier");
103 case MCSymbolRefExpr::VK_None:
104 Type = ELF::R_PPC_REL16;
106 case MCSymbolRefExpr::VK_PPC_LO:
107 Type = ELF::R_PPC_REL16_LO;
109 case MCSymbolRefExpr::VK_PPC_HI:
110 Type = ELF::R_PPC_REL16_HI;
112 case MCSymbolRefExpr::VK_PPC_HA:
113 Type = ELF::R_PPC_REL16_HA;
119 Type = ELF::R_PPC_REL32;
123 Type = ELF::R_PPC64_REL64;
127 switch ((unsigned)Fixup.getKind()) {
128 default: llvm_unreachable("invalid fixup kind!");
129 case PPC::fixup_ppc_br24abs:
130 Type = ELF::R_PPC_ADDR24;
132 case PPC::fixup_ppc_brcond14abs:
133 Type = ELF::R_PPC_ADDR14; // XXX: or BRNTAKEN?_
135 case PPC::fixup_ppc_half16:
137 default: llvm_unreachable("Unsupported Modifier");
138 case MCSymbolRefExpr::VK_None:
139 Type = ELF::R_PPC_ADDR16;
141 case MCSymbolRefExpr::VK_PPC_LO:
142 Type = ELF::R_PPC_ADDR16_LO;
144 case MCSymbolRefExpr::VK_PPC_HI:
145 Type = ELF::R_PPC_ADDR16_HI;
147 case MCSymbolRefExpr::VK_PPC_HA:
148 Type = ELF::R_PPC_ADDR16_HA;
150 case MCSymbolRefExpr::VK_PPC_HIGHER:
151 Type = ELF::R_PPC64_ADDR16_HIGHER;
153 case MCSymbolRefExpr::VK_PPC_HIGHERA:
154 Type = ELF::R_PPC64_ADDR16_HIGHERA;
156 case MCSymbolRefExpr::VK_PPC_HIGHEST:
157 Type = ELF::R_PPC64_ADDR16_HIGHEST;
159 case MCSymbolRefExpr::VK_PPC_HIGHESTA:
160 Type = ELF::R_PPC64_ADDR16_HIGHESTA;
162 case MCSymbolRefExpr::VK_GOT:
163 Type = ELF::R_PPC_GOT16;
165 case MCSymbolRefExpr::VK_PPC_GOT_LO:
166 Type = ELF::R_PPC_GOT16_LO;
168 case MCSymbolRefExpr::VK_PPC_GOT_HI:
169 Type = ELF::R_PPC_GOT16_HI;
171 case MCSymbolRefExpr::VK_PPC_GOT_HA:
172 Type = ELF::R_PPC_GOT16_HA;
174 case MCSymbolRefExpr::VK_PPC_TOC:
175 Type = ELF::R_PPC64_TOC16;
177 case MCSymbolRefExpr::VK_PPC_TOC_LO:
178 Type = ELF::R_PPC64_TOC16_LO;
180 case MCSymbolRefExpr::VK_PPC_TOC_HI:
181 Type = ELF::R_PPC64_TOC16_HI;
183 case MCSymbolRefExpr::VK_PPC_TOC_HA:
184 Type = ELF::R_PPC64_TOC16_HA;
186 case MCSymbolRefExpr::VK_PPC_TPREL:
187 Type = ELF::R_PPC_TPREL16;
189 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
190 Type = ELF::R_PPC_TPREL16_LO;
192 case MCSymbolRefExpr::VK_PPC_TPREL_HI:
193 Type = ELF::R_PPC_TPREL16_HI;
195 case MCSymbolRefExpr::VK_PPC_TPREL_HA:
196 Type = ELF::R_PPC_TPREL16_HA;
198 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHER:
199 Type = ELF::R_PPC64_TPREL16_HIGHER;
201 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHERA:
202 Type = ELF::R_PPC64_TPREL16_HIGHERA;
204 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHEST:
205 Type = ELF::R_PPC64_TPREL16_HIGHEST;
207 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHESTA:
208 Type = ELF::R_PPC64_TPREL16_HIGHESTA;
210 case MCSymbolRefExpr::VK_PPC_DTPREL:
211 Type = ELF::R_PPC64_DTPREL16;
213 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
214 Type = ELF::R_PPC64_DTPREL16_LO;
216 case MCSymbolRefExpr::VK_PPC_DTPREL_HI:
217 Type = ELF::R_PPC64_DTPREL16_HI;
219 case MCSymbolRefExpr::VK_PPC_DTPREL_HA:
220 Type = ELF::R_PPC64_DTPREL16_HA;
222 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHER:
223 Type = ELF::R_PPC64_DTPREL16_HIGHER;
225 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHERA:
226 Type = ELF::R_PPC64_DTPREL16_HIGHERA;
228 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHEST:
229 Type = ELF::R_PPC64_DTPREL16_HIGHEST;
231 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHESTA:
232 Type = ELF::R_PPC64_DTPREL16_HIGHESTA;
234 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD:
235 Type = ELF::R_PPC64_GOT_TLSGD16;
237 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO:
238 Type = ELF::R_PPC64_GOT_TLSGD16_LO;
240 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HI:
241 Type = ELF::R_PPC64_GOT_TLSGD16_HI;
243 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA:
244 Type = ELF::R_PPC64_GOT_TLSGD16_HA;
246 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD:
247 Type = ELF::R_PPC64_GOT_TLSLD16;
249 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO:
250 Type = ELF::R_PPC64_GOT_TLSLD16_LO;
252 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HI:
253 Type = ELF::R_PPC64_GOT_TLSLD16_HI;
255 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA:
256 Type = ELF::R_PPC64_GOT_TLSLD16_HA;
258 case MCSymbolRefExpr::VK_PPC_GOT_TPREL:
259 /* We don't have R_PPC64_GOT_TPREL16, but since GOT offsets
260 are always 4-aligned, we can use R_PPC64_GOT_TPREL16_DS. */
261 Type = ELF::R_PPC64_GOT_TPREL16_DS;
263 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO:
264 /* We don't have R_PPC64_GOT_TPREL16_LO, but since GOT offsets
265 are always 4-aligned, we can use R_PPC64_GOT_TPREL16_LO_DS. */
266 Type = ELF::R_PPC64_GOT_TPREL16_LO_DS;
268 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HI:
269 Type = ELF::R_PPC64_GOT_TPREL16_HI;
271 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL:
272 /* We don't have R_PPC64_GOT_DTPREL16, but since GOT offsets
273 are always 4-aligned, we can use R_PPC64_GOT_DTPREL16_DS. */
274 Type = ELF::R_PPC64_GOT_DTPREL16_DS;
276 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO:
277 /* We don't have R_PPC64_GOT_DTPREL16_LO, but since GOT offsets
278 are always 4-aligned, we can use R_PPC64_GOT_DTPREL16_LO_DS. */
279 Type = ELF::R_PPC64_GOT_DTPREL16_LO_DS;
281 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA:
282 Type = ELF::R_PPC64_GOT_TPREL16_HA;
284 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HI:
285 Type = ELF::R_PPC64_GOT_DTPREL16_HI;
287 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HA:
288 Type = ELF::R_PPC64_GOT_DTPREL16_HA;
292 case PPC::fixup_ppc_half16ds:
294 default: llvm_unreachable("Unsupported Modifier");
295 case MCSymbolRefExpr::VK_None:
296 Type = ELF::R_PPC64_ADDR16_DS;
298 case MCSymbolRefExpr::VK_PPC_LO:
299 Type = ELF::R_PPC64_ADDR16_LO_DS;
301 case MCSymbolRefExpr::VK_GOT:
302 Type = ELF::R_PPC64_GOT16_DS;
304 case MCSymbolRefExpr::VK_PPC_GOT_LO:
305 Type = ELF::R_PPC64_GOT16_LO_DS;
307 case MCSymbolRefExpr::VK_PPC_TOC:
308 Type = ELF::R_PPC64_TOC16_DS;
310 case MCSymbolRefExpr::VK_PPC_TOC_LO:
311 Type = ELF::R_PPC64_TOC16_LO_DS;
313 case MCSymbolRefExpr::VK_PPC_TPREL:
314 Type = ELF::R_PPC64_TPREL16_DS;
316 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
317 Type = ELF::R_PPC64_TPREL16_LO_DS;
319 case MCSymbolRefExpr::VK_PPC_DTPREL:
320 Type = ELF::R_PPC64_DTPREL16_DS;
322 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
323 Type = ELF::R_PPC64_DTPREL16_LO_DS;
325 case MCSymbolRefExpr::VK_PPC_GOT_TPREL:
326 Type = ELF::R_PPC64_GOT_TPREL16_DS;
328 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO:
329 Type = ELF::R_PPC64_GOT_TPREL16_LO_DS;
331 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL:
332 Type = ELF::R_PPC64_GOT_DTPREL16_DS;
334 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO:
335 Type = ELF::R_PPC64_GOT_DTPREL16_LO_DS;
339 case PPC::fixup_ppc_nofixup:
341 default: llvm_unreachable("Unsupported Modifier");
342 case MCSymbolRefExpr::VK_PPC_TLSGD:
343 Type = ELF::R_PPC64_TLSGD;
345 case MCSymbolRefExpr::VK_PPC_TLSLD:
346 Type = ELF::R_PPC64_TLSLD;
348 case MCSymbolRefExpr::VK_PPC_TLS:
349 Type = ELF::R_PPC64_TLS;
355 default: llvm_unreachable("Unsupported Modifier");
356 case MCSymbolRefExpr::VK_PPC_TOCBASE:
357 Type = ELF::R_PPC64_TOC;
359 case MCSymbolRefExpr::VK_None:
360 Type = ELF::R_PPC64_ADDR64;
362 case MCSymbolRefExpr::VK_PPC_DTPMOD:
363 Type = ELF::R_PPC64_DTPMOD64;
365 case MCSymbolRefExpr::VK_PPC_TPREL:
366 Type = ELF::R_PPC64_TPREL64;
368 case MCSymbolRefExpr::VK_PPC_DTPREL:
369 Type = ELF::R_PPC64_DTPREL64;
374 Type = ELF::R_PPC_ADDR32;
377 Type = ELF::R_PPC_ADDR16;
384 unsigned PPCELFObjectWriter::GetRelocType(const MCValue &Target,
385 const MCFixup &Fixup,
386 bool IsPCRel) const {
387 return getRelocTypeInner(Target, Fixup, IsPCRel);
390 MCObjectWriter *llvm::createPPCELFObjectWriter(raw_ostream &OS,
394 MCELFObjectTargetWriter *MOTW = new PPCELFObjectWriter(Is64Bit, OSABI);
395 return createELFObjectWriter(MOTW, OS, IsLittleEndian);