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, bool IsLittleEndian);
28 virtual ~AArch64ELFObjectWriter();
31 unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
32 bool IsPCRel) const override;
38 AArch64ELFObjectWriter::AArch64ELFObjectWriter(uint8_t OSABI, bool IsLittleEndian)
39 : MCELFObjectTargetWriter(/*Is64Bit*/ true, OSABI, ELF::EM_AARCH64,
40 /*HasRelocationAddend*/ true)
43 AArch64ELFObjectWriter::~AArch64ELFObjectWriter()
46 unsigned AArch64ELFObjectWriter::GetRelocType(const MCValue &Target,
51 switch ((unsigned)Fixup.getKind()) {
53 llvm_unreachable("Unimplemented fixup -> relocation");
55 return ELF::R_AARCH64_PREL64;
57 return ELF::R_AARCH64_PREL32;
59 return ELF::R_AARCH64_PREL16;
60 case AArch64::fixup_a64_ld_prel:
61 Type = ELF::R_AARCH64_LD_PREL_LO19;
63 case AArch64::fixup_a64_adr_prel:
64 Type = ELF::R_AARCH64_ADR_PREL_LO21;
66 case AArch64::fixup_a64_adr_prel_page:
67 Type = ELF::R_AARCH64_ADR_PREL_PG_HI21;
69 case AArch64::fixup_a64_adr_prel_got_page:
70 Type = ELF::R_AARCH64_ADR_GOT_PAGE;
72 case AArch64::fixup_a64_tstbr:
73 Type = ELF::R_AARCH64_TSTBR14;
75 case AArch64::fixup_a64_condbr:
76 Type = ELF::R_AARCH64_CONDBR19;
78 case AArch64::fixup_a64_uncondbr:
79 Type = ELF::R_AARCH64_JUMP26;
81 case AArch64::fixup_a64_call:
82 Type = ELF::R_AARCH64_CALL26;
84 case AArch64::fixup_a64_adr_gottprel_page:
85 Type = ELF::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21;
87 case AArch64::fixup_a64_ld_gottprel_prel19:
88 Type = ELF::R_AARCH64_TLSIE_LD_GOTTPREL_PREL19;
90 case AArch64::fixup_a64_tlsdesc_adr_page:
91 Type = ELF::R_AARCH64_TLSDESC_ADR_PAGE;
95 switch ((unsigned)Fixup.getKind()) {
97 llvm_unreachable("Unimplemented fixup -> relocation");
99 return ELF::R_AARCH64_ABS64;
101 return ELF::R_AARCH64_ABS32;
103 return ELF::R_AARCH64_ABS16;
104 case AArch64::fixup_a64_add_lo12:
105 Type = ELF::R_AARCH64_ADD_ABS_LO12_NC;
107 case AArch64::fixup_a64_ld64_got_lo12_nc:
108 Type = ELF::R_AARCH64_LD64_GOT_LO12_NC;
110 case AArch64::fixup_a64_ldst8_lo12:
111 Type = ELF::R_AARCH64_LDST8_ABS_LO12_NC;
113 case AArch64::fixup_a64_ldst16_lo12:
114 Type = ELF::R_AARCH64_LDST16_ABS_LO12_NC;
116 case AArch64::fixup_a64_ldst32_lo12:
117 Type = ELF::R_AARCH64_LDST32_ABS_LO12_NC;
119 case AArch64::fixup_a64_ldst64_lo12:
120 Type = ELF::R_AARCH64_LDST64_ABS_LO12_NC;
122 case AArch64::fixup_a64_ldst128_lo12:
123 Type = ELF::R_AARCH64_LDST128_ABS_LO12_NC;
125 case AArch64::fixup_a64_movw_uabs_g0:
126 Type = ELF::R_AARCH64_MOVW_UABS_G0;
128 case AArch64::fixup_a64_movw_uabs_g0_nc:
129 Type = ELF::R_AARCH64_MOVW_UABS_G0_NC;
131 case AArch64::fixup_a64_movw_uabs_g1:
132 Type = ELF::R_AARCH64_MOVW_UABS_G1;
134 case AArch64::fixup_a64_movw_uabs_g1_nc:
135 Type = ELF::R_AARCH64_MOVW_UABS_G1_NC;
137 case AArch64::fixup_a64_movw_uabs_g2:
138 Type = ELF::R_AARCH64_MOVW_UABS_G2;
140 case AArch64::fixup_a64_movw_uabs_g2_nc:
141 Type = ELF::R_AARCH64_MOVW_UABS_G2_NC;
143 case AArch64::fixup_a64_movw_uabs_g3:
144 Type = ELF::R_AARCH64_MOVW_UABS_G3;
146 case AArch64::fixup_a64_movw_sabs_g0:
147 Type = ELF::R_AARCH64_MOVW_SABS_G0;
149 case AArch64::fixup_a64_movw_sabs_g1:
150 Type = ELF::R_AARCH64_MOVW_SABS_G1;
152 case AArch64::fixup_a64_movw_sabs_g2:
153 Type = ELF::R_AARCH64_MOVW_SABS_G2;
156 // TLS Local-dynamic block
157 case AArch64::fixup_a64_movw_dtprel_g2:
158 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G2;
160 case AArch64::fixup_a64_movw_dtprel_g1:
161 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G1;
163 case AArch64::fixup_a64_movw_dtprel_g1_nc:
164 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G1_NC;
166 case AArch64::fixup_a64_movw_dtprel_g0:
167 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G0;
169 case AArch64::fixup_a64_movw_dtprel_g0_nc:
170 Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC;
172 case AArch64::fixup_a64_add_dtprel_hi12:
173 Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_HI12;
175 case AArch64::fixup_a64_add_dtprel_lo12:
176 Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_LO12;
178 case AArch64::fixup_a64_add_dtprel_lo12_nc:
179 Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC;
181 case AArch64::fixup_a64_ldst8_dtprel_lo12:
182 Type = ELF::R_AARCH64_TLSLD_LDST8_DTPREL_LO12;
184 case AArch64::fixup_a64_ldst8_dtprel_lo12_nc:
185 Type = ELF::R_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC;
187 case AArch64::fixup_a64_ldst16_dtprel_lo12:
188 Type = ELF::R_AARCH64_TLSLD_LDST16_DTPREL_LO12;
190 case AArch64::fixup_a64_ldst16_dtprel_lo12_nc:
191 Type = ELF::R_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC;
193 case AArch64::fixup_a64_ldst32_dtprel_lo12:
194 Type = ELF::R_AARCH64_TLSLD_LDST32_DTPREL_LO12;
196 case AArch64::fixup_a64_ldst32_dtprel_lo12_nc:
197 Type = ELF::R_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC;
199 case AArch64::fixup_a64_ldst64_dtprel_lo12:
200 Type = ELF::R_AARCH64_TLSLD_LDST64_DTPREL_LO12;
202 case AArch64::fixup_a64_ldst64_dtprel_lo12_nc:
203 Type = ELF::R_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC;
206 // TLS initial-exec block
207 case AArch64::fixup_a64_movw_gottprel_g1:
208 Type = ELF::R_AARCH64_TLSIE_MOVW_GOTTPREL_G1;
210 case AArch64::fixup_a64_movw_gottprel_g0_nc:
211 Type = ELF::R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC;
213 case AArch64::fixup_a64_ld64_gottprel_lo12_nc:
214 Type = ELF::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC;
217 // TLS local-exec block
218 case AArch64::fixup_a64_movw_tprel_g2:
219 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G2;
221 case AArch64::fixup_a64_movw_tprel_g1:
222 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G1;
224 case AArch64::fixup_a64_movw_tprel_g1_nc:
225 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC;
227 case AArch64::fixup_a64_movw_tprel_g0:
228 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G0;
230 case AArch64::fixup_a64_movw_tprel_g0_nc:
231 Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC;
233 case AArch64::fixup_a64_add_tprel_hi12:
234 Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_HI12;
236 case AArch64::fixup_a64_add_tprel_lo12:
237 Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_LO12;
239 case AArch64::fixup_a64_add_tprel_lo12_nc:
240 Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC;
242 case AArch64::fixup_a64_ldst8_tprel_lo12:
243 Type = ELF::R_AARCH64_TLSLE_LDST8_TPREL_LO12;
245 case AArch64::fixup_a64_ldst8_tprel_lo12_nc:
246 Type = ELF::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC;
248 case AArch64::fixup_a64_ldst16_tprel_lo12:
249 Type = ELF::R_AARCH64_TLSLE_LDST16_TPREL_LO12;
251 case AArch64::fixup_a64_ldst16_tprel_lo12_nc:
252 Type = ELF::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC;
254 case AArch64::fixup_a64_ldst32_tprel_lo12:
255 Type = ELF::R_AARCH64_TLSLE_LDST32_TPREL_LO12;
257 case AArch64::fixup_a64_ldst32_tprel_lo12_nc:
258 Type = ELF::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC;
260 case AArch64::fixup_a64_ldst64_tprel_lo12:
261 Type = ELF::R_AARCH64_TLSLE_LDST64_TPREL_LO12;
263 case AArch64::fixup_a64_ldst64_tprel_lo12_nc:
264 Type = ELF::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC;
267 // TLS general-dynamic block
268 case AArch64::fixup_a64_tlsdesc_adr_page:
269 Type = ELF::R_AARCH64_TLSDESC_ADR_PAGE;
271 case AArch64::fixup_a64_tlsdesc_ld64_lo12_nc:
272 Type = ELF::R_AARCH64_TLSDESC_LD64_LO12_NC;
274 case AArch64::fixup_a64_tlsdesc_add_lo12_nc:
275 Type = ELF::R_AARCH64_TLSDESC_ADD_LO12_NC;
277 case AArch64::fixup_a64_tlsdesc_call:
278 Type = ELF::R_AARCH64_TLSDESC_CALL;
286 MCObjectWriter *llvm::createAArch64ELFObjectWriter(raw_ostream &OS,
288 bool IsLittleEndian) {
289 MCELFObjectTargetWriter *MOTW = new AArch64ELFObjectWriter(OSABI, IsLittleEndian);
290 return createELFObjectWriter(MOTW, OS, IsLittleEndian);