1 //===-- AArch64ELFObjectWriter.cpp - AArch64 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 // This file handles ELF-specific object emission, converting LLVM's internal
11 // fixups into the appropriate relocations.
13 //===----------------------------------------------------------------------===//
15 #include "MCTargetDesc/AArch64FixupKinds.h"
16 #include "MCTargetDesc/AArch64MCTargetDesc.h"
17 #include "llvm/MC/MCELFObjectWriter.h"
18 #include "llvm/MC/MCValue.h"
19 #include "llvm/Support/ErrorHandling.h"
24 class AArch64ELFObjectWriter : public MCELFObjectTargetWriter {
26 AArch64ELFObjectWriter(uint8_t OSABI);
28 virtual ~AArch64ELFObjectWriter();
31 virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
32 bool IsPCRel, bool IsRelocWithSymbol,
33 int64_t Addend) const;
38 AArch64ELFObjectWriter::AArch64ELFObjectWriter(uint8_t OSABI)
39 : MCELFObjectTargetWriter(/*Is64Bit*/ true, OSABI, ELF::EM_AARCH64,
40 /*HasRelocationAddend*/ true)
43 AArch64ELFObjectWriter::~AArch64ELFObjectWriter()
46 unsigned AArch64ELFObjectWriter::GetRelocType(const MCValue &Target,
49 bool IsRelocWithSymbol,
50 int64_t Addend) const {
53 switch ((unsigned)Fixup.getKind()) {
55 llvm_unreachable("Unimplemented fixup -> relocation");
57 return ELF::R_AARCH64_PREL64;
59 return ELF::R_AARCH64_PREL32;
61 return ELF::R_AARCH64_PREL16;
62 case AArch64::fixup_a64_ld_prel:
63 Type = ELF::R_AARCH64_LD_PREL_LO19;
65 case AArch64::fixup_a64_adr_prel:
66 Type = ELF::R_AARCH64_ADR_PREL_LO21;
68 case AArch64::fixup_a64_adr_prel_page:
69 Type = ELF::R_AARCH64_ADR_PREL_PG_HI21;
71 case AArch64::fixup_a64_adr_prel_got_page:
72 Type = ELF::R_AARCH64_ADR_GOT_PAGE;
74 case AArch64::fixup_a64_tstbr:
75 Type = ELF::R_AARCH64_TSTBR14;
77 case AArch64::fixup_a64_condbr:
78 Type = ELF::R_AARCH64_CONDBR19;
80 case AArch64::fixup_a64_uncondbr:
81 Type = ELF::R_AARCH64_JUMP26;
83 case AArch64::fixup_a64_call:
84 Type = ELF::R_AARCH64_CALL26;
86 case AArch64::fixup_a64_adr_gottprel_page:
87 Type = ELF::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21;
89 case AArch64::fixup_a64_ld_gottprel_prel19:
90 Type = ELF::R_AARCH64_TLSIE_LD_GOTTPREL_PREL19;
92 case AArch64::fixup_a64_tlsdesc_adr_page:
93 Type = ELF::R_AARCH64_TLSDESC_ADR_PAGE;
97 switch ((unsigned)Fixup.getKind()) {
99 llvm_unreachable("Unimplemented fixup -> relocation");
101 return ELF::R_AARCH64_ABS64;
103 return ELF::R_AARCH64_ABS32;
105 return ELF::R_AARCH64_ABS16;
106 case AArch64::fixup_a64_add_lo12:
107 Type = ELF::R_AARCH64_ADD_ABS_LO12_NC;
109 case AArch64::fixup_a64_ld64_got_lo12_nc:
110 Type = ELF::R_AARCH64_LD64_GOT_LO12_NC;
112 case AArch64::fixup_a64_ldst8_lo12:
113 Type = ELF::R_AARCH64_LDST8_ABS_LO12_NC;
115 case AArch64::fixup_a64_ldst16_lo12:
116 Type = ELF::R_AARCH64_LDST16_ABS_LO12_NC;
118 case AArch64::fixup_a64_ldst32_lo12:
119 Type = ELF::R_AARCH64_LDST32_ABS_LO12_NC;
121 case AArch64::fixup_a64_ldst64_lo12:
122 Type = ELF::R_AARCH64_LDST64_ABS_LO12_NC;
124 case AArch64::fixup_a64_ldst128_lo12:
125 Type = ELF::R_AARCH64_LDST128_ABS_LO12_NC;
127 case AArch64::fixup_a64_movw_uabs_g0:
128 Type = ELF::R_AARCH64_MOVW_UABS_G0;
130 case AArch64::fixup_a64_movw_uabs_g0_nc:
131 Type = ELF::R_AARCH64_MOVW_UABS_G0_NC;
133 case AArch64::fixup_a64_movw_uabs_g1:
134 Type = ELF::R_AARCH64_MOVW_UABS_G1;
136 case AArch64::fixup_a64_movw_uabs_g1_nc:
137 Type = ELF::R_AARCH64_MOVW_UABS_G1_NC;
139 case AArch64::fixup_a64_movw_uabs_g2:
140 Type = ELF::R_AARCH64_MOVW_UABS_G2;
142 case AArch64::fixup_a64_movw_uabs_g2_nc:
143 Type = ELF::R_AARCH64_MOVW_UABS_G2_NC;
145 case AArch64::fixup_a64_movw_uabs_g3:
146 Type = ELF::R_AARCH64_MOVW_UABS_G3;
148 case AArch64::fixup_a64_movw_sabs_g0:
149 Type = ELF::R_AARCH64_MOVW_SABS_G0;
151 case AArch64::fixup_a64_movw_sabs_g1:
152 Type = ELF::R_AARCH64_MOVW_SABS_G1;
154 case AArch64::fixup_a64_movw_sabs_g2:
155 Type = ELF::R_AARCH64_MOVW_SABS_G2;
158 // TLS Local-dynamic block
159 case AArch64::fixup_a64_movw_dtprel_g2:
160 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G2;
162 case AArch64::fixup_a64_movw_dtprel_g1:
163 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G1;
165 case AArch64::fixup_a64_movw_dtprel_g1_nc:
166 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G1_NC;
168 case AArch64::fixup_a64_movw_dtprel_g0:
169 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G0;
171 case AArch64::fixup_a64_movw_dtprel_g0_nc:
172 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC;
174 case AArch64::fixup_a64_add_dtprel_hi12:
175 Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_HI12;
177 case AArch64::fixup_a64_add_dtprel_lo12:
178 Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_LO12;
180 case AArch64::fixup_a64_add_dtprel_lo12_nc:
181 Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC;
183 case AArch64::fixup_a64_ldst8_dtprel_lo12:
184 Type = ELF::R_AARCH64_TLSLD_LDST8_DTPREL_LO12;
186 case AArch64::fixup_a64_ldst8_dtprel_lo12_nc:
187 Type = ELF::R_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC;
189 case AArch64::fixup_a64_ldst16_dtprel_lo12:
190 Type = ELF::R_AARCH64_TLSLD_LDST16_DTPREL_LO12;
192 case AArch64::fixup_a64_ldst16_dtprel_lo12_nc:
193 Type = ELF::R_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC;
195 case AArch64::fixup_a64_ldst32_dtprel_lo12:
196 Type = ELF::R_AARCH64_TLSLD_LDST32_DTPREL_LO12;
198 case AArch64::fixup_a64_ldst32_dtprel_lo12_nc:
199 Type = ELF::R_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC;
201 case AArch64::fixup_a64_ldst64_dtprel_lo12:
202 Type = ELF::R_AARCH64_TLSLD_LDST64_DTPREL_LO12;
204 case AArch64::fixup_a64_ldst64_dtprel_lo12_nc:
205 Type = ELF::R_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC;
208 // TLS initial-exec block
209 case AArch64::fixup_a64_movw_gottprel_g1:
210 Type = ELF::R_AARCH64_TLSIE_MOVW_GOTTPREL_G1;
212 case AArch64::fixup_a64_movw_gottprel_g0_nc:
213 Type = ELF::R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC;
215 case AArch64::fixup_a64_ld64_gottprel_lo12_nc:
216 Type = ELF::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC;
219 // TLS local-exec block
220 case AArch64::fixup_a64_movw_tprel_g2:
221 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G2;
223 case AArch64::fixup_a64_movw_tprel_g1:
224 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G1;
226 case AArch64::fixup_a64_movw_tprel_g1_nc:
227 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC;
229 case AArch64::fixup_a64_movw_tprel_g0:
230 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G0;
232 case AArch64::fixup_a64_movw_tprel_g0_nc:
233 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC;
235 case AArch64::fixup_a64_add_tprel_hi12:
236 Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_HI12;
238 case AArch64::fixup_a64_add_tprel_lo12:
239 Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_LO12;
241 case AArch64::fixup_a64_add_tprel_lo12_nc:
242 Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC;
244 case AArch64::fixup_a64_ldst8_tprel_lo12:
245 Type = ELF::R_AARCH64_TLSLE_LDST8_TPREL_LO12;
247 case AArch64::fixup_a64_ldst8_tprel_lo12_nc:
248 Type = ELF::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC;
250 case AArch64::fixup_a64_ldst16_tprel_lo12:
251 Type = ELF::R_AARCH64_TLSLE_LDST16_TPREL_LO12;
253 case AArch64::fixup_a64_ldst16_tprel_lo12_nc:
254 Type = ELF::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC;
256 case AArch64::fixup_a64_ldst32_tprel_lo12:
257 Type = ELF::R_AARCH64_TLSLE_LDST32_TPREL_LO12;
259 case AArch64::fixup_a64_ldst32_tprel_lo12_nc:
260 Type = ELF::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC;
262 case AArch64::fixup_a64_ldst64_tprel_lo12:
263 Type = ELF::R_AARCH64_TLSLE_LDST64_TPREL_LO12;
265 case AArch64::fixup_a64_ldst64_tprel_lo12_nc:
266 Type = ELF::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC;
269 // TLS general-dynamic block
270 case AArch64::fixup_a64_tlsdesc_adr_page:
271 Type = ELF::R_AARCH64_TLSDESC_ADR_PAGE;
273 case AArch64::fixup_a64_tlsdesc_ld64_lo12_nc:
274 Type = ELF::R_AARCH64_TLSDESC_LD64_LO12_NC;
276 case AArch64::fixup_a64_tlsdesc_add_lo12_nc:
277 Type = ELF::R_AARCH64_TLSDESC_ADD_LO12_NC;
279 case AArch64::fixup_a64_tlsdesc_call:
280 Type = ELF::R_AARCH64_TLSDESC_CALL;
288 MCObjectWriter *llvm::createAArch64ELFObjectWriter(raw_ostream &OS,
290 MCELFObjectTargetWriter *MOTW = new AArch64ELFObjectWriter(OSABI);
291 return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/true);