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:
86 Type = ELF::R_PPC_REL24;
88 case PPC::fixup_ppc_brcond14:
89 case PPC::fixup_ppc_brcond14abs:
90 Type = ELF::R_PPC_REL14;
92 case PPC::fixup_ppc_half16:
94 default: llvm_unreachable("Unsupported Modifier");
95 case MCSymbolRefExpr::VK_None:
96 Type = ELF::R_PPC_REL16;
98 case MCSymbolRefExpr::VK_PPC_LO:
99 Type = ELF::R_PPC_REL16_LO;
101 case MCSymbolRefExpr::VK_PPC_HI:
102 Type = ELF::R_PPC_REL16_HI;
104 case MCSymbolRefExpr::VK_PPC_HA:
105 Type = ELF::R_PPC_REL16_HA;
111 Type = ELF::R_PPC_REL32;
115 Type = ELF::R_PPC64_REL64;
119 switch ((unsigned)Fixup.getKind()) {
120 default: llvm_unreachable("invalid fixup kind!");
121 case PPC::fixup_ppc_br24abs:
122 Type = ELF::R_PPC_ADDR24;
124 case PPC::fixup_ppc_brcond14abs:
125 Type = ELF::R_PPC_ADDR14; // XXX: or BRNTAKEN?_
127 case PPC::fixup_ppc_half16:
129 default: llvm_unreachable("Unsupported Modifier");
130 case MCSymbolRefExpr::VK_None:
131 Type = ELF::R_PPC_ADDR16;
133 case MCSymbolRefExpr::VK_PPC_LO:
134 Type = ELF::R_PPC_ADDR16_LO;
136 case MCSymbolRefExpr::VK_PPC_HI:
137 Type = ELF::R_PPC_ADDR16_HI;
139 case MCSymbolRefExpr::VK_PPC_HA:
140 Type = ELF::R_PPC_ADDR16_HA;
142 case MCSymbolRefExpr::VK_PPC_HIGHER:
143 Type = ELF::R_PPC64_ADDR16_HIGHER;
145 case MCSymbolRefExpr::VK_PPC_HIGHERA:
146 Type = ELF::R_PPC64_ADDR16_HIGHERA;
148 case MCSymbolRefExpr::VK_PPC_HIGHEST:
149 Type = ELF::R_PPC64_ADDR16_HIGHEST;
151 case MCSymbolRefExpr::VK_PPC_HIGHESTA:
152 Type = ELF::R_PPC64_ADDR16_HIGHESTA;
154 case MCSymbolRefExpr::VK_GOT:
155 Type = ELF::R_PPC_GOT16;
157 case MCSymbolRefExpr::VK_PPC_GOT_LO:
158 Type = ELF::R_PPC_GOT16_LO;
160 case MCSymbolRefExpr::VK_PPC_GOT_HI:
161 Type = ELF::R_PPC_GOT16_HI;
163 case MCSymbolRefExpr::VK_PPC_GOT_HA:
164 Type = ELF::R_PPC_GOT16_HA;
166 case MCSymbolRefExpr::VK_PPC_TOC:
167 Type = ELF::R_PPC64_TOC16;
169 case MCSymbolRefExpr::VK_PPC_TOC_LO:
170 Type = ELF::R_PPC64_TOC16_LO;
172 case MCSymbolRefExpr::VK_PPC_TOC_HI:
173 Type = ELF::R_PPC64_TOC16_HI;
175 case MCSymbolRefExpr::VK_PPC_TOC_HA:
176 Type = ELF::R_PPC64_TOC16_HA;
178 case MCSymbolRefExpr::VK_PPC_TPREL:
179 Type = ELF::R_PPC_TPREL16;
181 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
182 Type = ELF::R_PPC_TPREL16_LO;
184 case MCSymbolRefExpr::VK_PPC_TPREL_HI:
185 Type = ELF::R_PPC_TPREL16_HI;
187 case MCSymbolRefExpr::VK_PPC_TPREL_HA:
188 Type = ELF::R_PPC_TPREL16_HA;
190 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHER:
191 Type = ELF::R_PPC64_TPREL16_HIGHER;
193 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHERA:
194 Type = ELF::R_PPC64_TPREL16_HIGHERA;
196 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHEST:
197 Type = ELF::R_PPC64_TPREL16_HIGHEST;
199 case MCSymbolRefExpr::VK_PPC_TPREL_HIGHESTA:
200 Type = ELF::R_PPC64_TPREL16_HIGHESTA;
202 case MCSymbolRefExpr::VK_PPC_DTPREL:
203 Type = ELF::R_PPC64_DTPREL16;
205 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
206 Type = ELF::R_PPC64_DTPREL16_LO;
208 case MCSymbolRefExpr::VK_PPC_DTPREL_HI:
209 Type = ELF::R_PPC64_DTPREL16_HI;
211 case MCSymbolRefExpr::VK_PPC_DTPREL_HA:
212 Type = ELF::R_PPC64_DTPREL16_HA;
214 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHER:
215 Type = ELF::R_PPC64_DTPREL16_HIGHER;
217 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHERA:
218 Type = ELF::R_PPC64_DTPREL16_HIGHERA;
220 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHEST:
221 Type = ELF::R_PPC64_DTPREL16_HIGHEST;
223 case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHESTA:
224 Type = ELF::R_PPC64_DTPREL16_HIGHESTA;
226 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD:
227 Type = ELF::R_PPC64_GOT_TLSGD16;
229 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO:
230 Type = ELF::R_PPC64_GOT_TLSGD16_LO;
232 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HI:
233 Type = ELF::R_PPC64_GOT_TLSGD16_HI;
235 case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA:
236 Type = ELF::R_PPC64_GOT_TLSGD16_HA;
238 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD:
239 Type = ELF::R_PPC64_GOT_TLSLD16;
241 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO:
242 Type = ELF::R_PPC64_GOT_TLSLD16_LO;
244 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HI:
245 Type = ELF::R_PPC64_GOT_TLSLD16_HI;
247 case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA:
248 Type = ELF::R_PPC64_GOT_TLSLD16_HA;
250 case MCSymbolRefExpr::VK_PPC_GOT_TPREL:
251 /* We don't have R_PPC64_GOT_TPREL16, but since GOT offsets
252 are always 4-aligned, we can use R_PPC64_GOT_TPREL16_DS. */
253 Type = ELF::R_PPC64_GOT_TPREL16_DS;
255 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO:
256 /* We don't have R_PPC64_GOT_TPREL16_LO, but since GOT offsets
257 are always 4-aligned, we can use R_PPC64_GOT_TPREL16_LO_DS. */
258 Type = ELF::R_PPC64_GOT_TPREL16_LO_DS;
260 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HI:
261 Type = ELF::R_PPC64_GOT_TPREL16_HI;
263 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL:
264 /* We don't have R_PPC64_GOT_DTPREL16, but since GOT offsets
265 are always 4-aligned, we can use R_PPC64_GOT_DTPREL16_DS. */
266 Type = ELF::R_PPC64_GOT_DTPREL16_DS;
268 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO:
269 /* We don't have R_PPC64_GOT_DTPREL16_LO, but since GOT offsets
270 are always 4-aligned, we can use R_PPC64_GOT_DTPREL16_LO_DS. */
271 Type = ELF::R_PPC64_GOT_DTPREL16_LO_DS;
273 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA:
274 Type = ELF::R_PPC64_GOT_TPREL16_HA;
276 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HI:
277 Type = ELF::R_PPC64_GOT_DTPREL16_HI;
279 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HA:
280 Type = ELF::R_PPC64_GOT_DTPREL16_HA;
284 case PPC::fixup_ppc_half16ds:
286 default: llvm_unreachable("Unsupported Modifier");
287 case MCSymbolRefExpr::VK_None:
288 Type = ELF::R_PPC64_ADDR16_DS;
290 case MCSymbolRefExpr::VK_PPC_LO:
291 Type = ELF::R_PPC64_ADDR16_LO_DS;
293 case MCSymbolRefExpr::VK_GOT:
294 Type = ELF::R_PPC64_GOT16_DS;
296 case MCSymbolRefExpr::VK_PPC_GOT_LO:
297 Type = ELF::R_PPC64_GOT16_LO_DS;
299 case MCSymbolRefExpr::VK_PPC_TOC:
300 Type = ELF::R_PPC64_TOC16_DS;
302 case MCSymbolRefExpr::VK_PPC_TOC_LO:
303 Type = ELF::R_PPC64_TOC16_LO_DS;
305 case MCSymbolRefExpr::VK_PPC_TPREL:
306 Type = ELF::R_PPC64_TPREL16_DS;
308 case MCSymbolRefExpr::VK_PPC_TPREL_LO:
309 Type = ELF::R_PPC64_TPREL16_LO_DS;
311 case MCSymbolRefExpr::VK_PPC_DTPREL:
312 Type = ELF::R_PPC64_DTPREL16_DS;
314 case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
315 Type = ELF::R_PPC64_DTPREL16_LO_DS;
317 case MCSymbolRefExpr::VK_PPC_GOT_TPREL:
318 Type = ELF::R_PPC64_GOT_TPREL16_DS;
320 case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO:
321 Type = ELF::R_PPC64_GOT_TPREL16_LO_DS;
323 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL:
324 Type = ELF::R_PPC64_GOT_DTPREL16_DS;
326 case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO:
327 Type = ELF::R_PPC64_GOT_DTPREL16_LO_DS;
331 case PPC::fixup_ppc_nofixup:
333 default: llvm_unreachable("Unsupported Modifier");
334 case MCSymbolRefExpr::VK_PPC_TLSGD:
335 Type = ELF::R_PPC64_TLSGD;
337 case MCSymbolRefExpr::VK_PPC_TLSLD:
338 Type = ELF::R_PPC64_TLSLD;
340 case MCSymbolRefExpr::VK_PPC_TLS:
341 Type = ELF::R_PPC64_TLS;
347 default: llvm_unreachable("Unsupported Modifier");
348 case MCSymbolRefExpr::VK_PPC_TOCBASE:
349 Type = ELF::R_PPC64_TOC;
351 case MCSymbolRefExpr::VK_None:
352 Type = ELF::R_PPC64_ADDR64;
354 case MCSymbolRefExpr::VK_PPC_DTPMOD:
355 Type = ELF::R_PPC64_DTPMOD64;
357 case MCSymbolRefExpr::VK_PPC_TPREL:
358 Type = ELF::R_PPC64_TPREL64;
360 case MCSymbolRefExpr::VK_PPC_DTPREL:
361 Type = ELF::R_PPC64_DTPREL64;
366 Type = ELF::R_PPC_ADDR32;
369 Type = ELF::R_PPC_ADDR16;
376 unsigned PPCELFObjectWriter::GetRelocType(const MCValue &Target,
377 const MCFixup &Fixup,
378 bool IsPCRel) const {
379 return getRelocTypeInner(Target, Fixup, IsPCRel);
382 MCObjectWriter *llvm::createPPCELFObjectWriter(raw_ostream &OS,
386 MCELFObjectTargetWriter *MOTW = new PPCELFObjectWriter(Is64Bit, OSABI);
387 return createELFObjectWriter(MOTW, OS, IsLittleEndian);