1 /* SPARC-specific support for ELF
2 Copyright (C) 2005-2022 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21
22 /* This file handles functionality common to the different SPARC ABI's. */
23
24 #include "sysdep.h"
25 #include "bfd.h"
26 #include "bfdlink.h"
27 #include "libbfd.h"
28 #include "libiberty.h"
29 #include "elf-bfd.h"
30 #include "elf/sparc.h"
31 #include "opcode/sparc.h"
32 #include "elfxx-sparc.h"
33 #include "elf-vxworks.h"
34 #include "objalloc.h"
35 #include "hashtab.h"
36
37 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
38 #define MINUS_ONE (~ (bfd_vma) 0)
39
40 #define ABI_64_P(abfd) \
41 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
42
43 /* The relocation "howto" table. */
44
45 /* Utility for performing the standard initial work of an instruction
46 relocation.
47 *PRELOCATION will contain the relocated item.
48 *PINSN will contain the instruction from the input stream.
49 If the result is `bfd_reloc_other' the caller can continue with
50 performing the relocation. Otherwise it must stop and return the
51 value to its caller. */
52
53 static bfd_reloc_status_type
init_insn_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,bfd_vma * prelocation,bfd_vma * pinsn)54 init_insn_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
55 void * data, asection *input_section, bfd *output_bfd,
56 bfd_vma *prelocation, bfd_vma *pinsn)
57 {
58 bfd_vma relocation;
59 reloc_howto_type *howto = reloc_entry->howto;
60
61 if (output_bfd != (bfd *) NULL
62 && (symbol->flags & BSF_SECTION_SYM) == 0
63 && (! howto->partial_inplace
64 || reloc_entry->addend == 0))
65 {
66 reloc_entry->address += input_section->output_offset;
67 return bfd_reloc_ok;
68 }
69
70 /* This works because partial_inplace is FALSE. */
71 if (output_bfd != NULL)
72 return bfd_reloc_continue;
73
74 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
75 return bfd_reloc_outofrange;
76
77 relocation = (symbol->value
78 + symbol->section->output_section->vma
79 + symbol->section->output_offset);
80 relocation += reloc_entry->addend;
81 if (howto->pc_relative)
82 {
83 relocation -= (input_section->output_section->vma
84 + input_section->output_offset);
85 relocation -= reloc_entry->address;
86 }
87
88 *prelocation = relocation;
89 *pinsn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
90 return bfd_reloc_other;
91 }
92
93 /* For unsupported relocs. */
94
95 static bfd_reloc_status_type
sparc_elf_notsup_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry ATTRIBUTE_UNUSED,asymbol * symbol ATTRIBUTE_UNUSED,void * data ATTRIBUTE_UNUSED,asection * input_section ATTRIBUTE_UNUSED,bfd * output_bfd ATTRIBUTE_UNUSED,char ** error_message ATTRIBUTE_UNUSED)96 sparc_elf_notsup_reloc (bfd *abfd ATTRIBUTE_UNUSED,
97 arelent *reloc_entry ATTRIBUTE_UNUSED,
98 asymbol *symbol ATTRIBUTE_UNUSED,
99 void * data ATTRIBUTE_UNUSED,
100 asection *input_section ATTRIBUTE_UNUSED,
101 bfd *output_bfd ATTRIBUTE_UNUSED,
102 char **error_message ATTRIBUTE_UNUSED)
103 {
104 return bfd_reloc_notsupported;
105 }
106
107 /* Handle the WDISP16 reloc. */
108
109 static bfd_reloc_status_type
sparc_elf_wdisp16_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)110 sparc_elf_wdisp16_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
111 void * data, asection *input_section, bfd *output_bfd,
112 char **error_message ATTRIBUTE_UNUSED)
113 {
114 bfd_vma relocation;
115 bfd_vma insn;
116 bfd_reloc_status_type status;
117
118 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
119 input_section, output_bfd, &relocation, &insn);
120 if (status != bfd_reloc_other)
121 return status;
122
123 insn &= ~ (bfd_vma) 0x303fff;
124 insn |= (((relocation >> 2) & 0xc000) << 6) | ((relocation >> 2) & 0x3fff);
125 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
126
127 if ((bfd_signed_vma) relocation < - 0x40000
128 || (bfd_signed_vma) relocation > 0x3ffff)
129 return bfd_reloc_overflow;
130 else
131 return bfd_reloc_ok;
132 }
133
134 /* Handle the WDISP10 reloc. */
135
136 static bfd_reloc_status_type
sparc_elf_wdisp10_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)137 sparc_elf_wdisp10_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
138 void * data, asection *input_section, bfd *output_bfd,
139 char **error_message ATTRIBUTE_UNUSED)
140 {
141 bfd_vma relocation;
142 bfd_vma insn;
143 bfd_reloc_status_type status;
144
145 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
146 input_section, output_bfd, &relocation, &insn);
147 if (status != bfd_reloc_other)
148 return status;
149
150 insn &= ~ (bfd_vma) 0x181fe0;
151 insn |= (((relocation >> 2) & 0x300) << 11)
152 | (((relocation >> 2) & 0xff) << 5);
153 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
154
155 if ((bfd_signed_vma) relocation < - 0x1000
156 || (bfd_signed_vma) relocation > 0xfff)
157 return bfd_reloc_overflow;
158 else
159 return bfd_reloc_ok;
160 }
161
162 /* Handle the HIX22 reloc. */
163
164 static bfd_reloc_status_type
sparc_elf_hix22_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)165 sparc_elf_hix22_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
166 void * data, asection *input_section, bfd *output_bfd,
167 char **error_message ATTRIBUTE_UNUSED)
168 {
169 bfd_vma relocation;
170 bfd_vma insn;
171 bfd_reloc_status_type status;
172
173 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
174 input_section, output_bfd, &relocation, &insn);
175 if (status != bfd_reloc_other)
176 return status;
177
178 relocation ^= MINUS_ONE;
179 insn = (insn &~ (bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff);
180 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
181
182 if ((relocation & ~ (bfd_vma) 0xffffffff) != 0)
183 return bfd_reloc_overflow;
184 else
185 return bfd_reloc_ok;
186 }
187
188 /* Handle the LOX10 reloc. */
189
190 static bfd_reloc_status_type
sparc_elf_lox10_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)191 sparc_elf_lox10_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
192 void * data, asection *input_section, bfd *output_bfd,
193 char **error_message ATTRIBUTE_UNUSED)
194 {
195 bfd_vma relocation;
196 bfd_vma insn;
197 bfd_reloc_status_type status;
198
199 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
200 input_section, output_bfd, &relocation, &insn);
201 if (status != bfd_reloc_other)
202 return status;
203
204 insn = (insn &~ (bfd_vma) 0x1fff) | 0x1c00 | (relocation & 0x3ff);
205 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
206
207 return bfd_reloc_ok;
208 }
209
210 static reloc_howto_type _bfd_sparc_elf_howto_table[] =
211 {
212 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
213 HOWTO(R_SPARC_8, 0,1, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true),
214 HOWTO(R_SPARC_16, 0,2,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true),
215 HOWTO(R_SPARC_32, 0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true),
216 HOWTO(R_SPARC_DISP8, 0,1, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true),
217 HOWTO(R_SPARC_DISP16, 0,2,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true),
218 HOWTO(R_SPARC_DISP32, 0,4,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0xffffffff,true),
219 HOWTO(R_SPARC_WDISP30, 2,4,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true),
220 HOWTO(R_SPARC_WDISP22, 2,4,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true),
221 HOWTO(R_SPARC_HI22, 10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true),
222 HOWTO(R_SPARC_22, 0,4,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true),
223 HOWTO(R_SPARC_13, 0,4,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true),
224 HOWTO(R_SPARC_LO10, 0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true),
225 HOWTO(R_SPARC_GOT10, 0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true),
226 HOWTO(R_SPARC_GOT13, 0,4,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true),
227 HOWTO(R_SPARC_GOT22, 10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true),
228 HOWTO(R_SPARC_PC10, 0,4,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true),
229 HOWTO(R_SPARC_PC22, 10,4,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true),
230 HOWTO(R_SPARC_WPLT30, 2,4,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true),
231 HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true),
232 HOWTO(R_SPARC_GLOB_DAT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT",false,0,0x00000000,true),
233 HOWTO(R_SPARC_JMP_SLOT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_SLOT",false,0,0x00000000,true),
234 HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true),
235 HOWTO(R_SPARC_UA32, 0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0xffffffff,true),
236 HOWTO(R_SPARC_PLT32, 0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT32", false,0,0xffffffff,true),
237 HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true),
238 HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true),
239 HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true),
240 HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true),
241 HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true),
242 HOWTO(R_SPARC_10, 0,4,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true),
243 HOWTO(R_SPARC_11, 0,4,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true),
244 HOWTO(R_SPARC_64, 0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", false,0,MINUS_ONE, true),
245 HOWTO(R_SPARC_OLO10, 0,4,13,false,0,complain_overflow_signed, sparc_elf_notsup_reloc, "R_SPARC_OLO10", false,0,0x00001fff,true),
246 HOWTO(R_SPARC_HH22, 42,4,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true),
247 HOWTO(R_SPARC_HM10, 32,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true),
248 HOWTO(R_SPARC_LM22, 10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true),
249 HOWTO(R_SPARC_PC_HH22, 42,4,22,true, 0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_PC_HH22", false,0,0x003fffff,true),
250 HOWTO(R_SPARC_PC_HM10, 32,4,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_HM10", false,0,0x000003ff,true),
251 HOWTO(R_SPARC_PC_LM22, 10,4,22,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_LM22", false,0,0x003fffff,true),
252 HOWTO(R_SPARC_WDISP16, 2,4,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true),
253 HOWTO(R_SPARC_WDISP19, 2,4,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true),
254 HOWTO(R_SPARC_UNUSED_42, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UNUSED_42",false,0,0x00000000,true),
255 HOWTO(R_SPARC_7, 0,4, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true),
256 HOWTO(R_SPARC_5, 0,4, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true),
257 HOWTO(R_SPARC_6, 0,4, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true),
258 HOWTO(R_SPARC_DISP64, 0,8,64,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP64", false,0,MINUS_ONE, true),
259 HOWTO(R_SPARC_PLT64, 0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT64", false,0,MINUS_ONE, true),
260 HOWTO(R_SPARC_HIX22, 0,8, 0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_HIX22", false,0,MINUS_ONE, false),
261 HOWTO(R_SPARC_LOX10, 0,8, 0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_LOX10", false,0,MINUS_ONE, false),
262 HOWTO(R_SPARC_H44, 22,4,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_H44", false,0,0x003fffff,false),
263 HOWTO(R_SPARC_M44, 12,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_M44", false,0,0x000003ff,false),
264 HOWTO(R_SPARC_L44, 0,4,13,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_L44", false,0,0x00000fff,false),
265 HOWTO(R_SPARC_REGISTER, 0,8, 0,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",false,0,MINUS_ONE, false),
266 HOWTO(R_SPARC_UA64, 0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA64", false,0,MINUS_ONE, true),
267 HOWTO(R_SPARC_UA16, 0,2,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", false,0,0x0000ffff,true),
268 HOWTO(R_SPARC_TLS_GD_HI22,10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_HI22",false,0,0x003fffff,true),
269 HOWTO(R_SPARC_TLS_GD_LO10,0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_LO10",false,0,0x000003ff,true),
270 HOWTO(R_SPARC_TLS_GD_ADD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_ADD",false,0,0x00000000,true),
271 HOWTO(R_SPARC_TLS_GD_CALL,2,4,30,true,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_CALL",false,0,0x3fffffff,true),
272 HOWTO(R_SPARC_TLS_LDM_HI22,10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_HI22",false,0,0x003fffff,true),
273 HOWTO(R_SPARC_TLS_LDM_LO10,0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_LO10",false,0,0x000003ff,true),
274 HOWTO(R_SPARC_TLS_LDM_ADD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_ADD",false,0,0x00000000,true),
275 HOWTO(R_SPARC_TLS_LDM_CALL,2,4,30,true,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_CALL",false,0,0x3fffffff,true),
276 HOWTO(R_SPARC_TLS_LDO_HIX22,0,4,0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_TLS_LDO_HIX22",false,0,0x003fffff, false),
277 HOWTO(R_SPARC_TLS_LDO_LOX10,0,4,0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_TLS_LDO_LOX10",false,0,0x000003ff, false),
278 HOWTO(R_SPARC_TLS_LDO_ADD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDO_ADD",false,0,0x00000000,true),
279 HOWTO(R_SPARC_TLS_IE_HI22,10,4,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_HI22",false,0,0x003fffff,true),
280 HOWTO(R_SPARC_TLS_IE_LO10,0,4,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LO10",false,0,0x000003ff,true),
281 HOWTO(R_SPARC_TLS_IE_LD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LD",false,0,0x00000000,true),
282 HOWTO(R_SPARC_TLS_IE_LDX,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LDX",false,0,0x00000000,true),
283 HOWTO(R_SPARC_TLS_IE_ADD,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_ADD",false,0,0x00000000,true),
284 HOWTO(R_SPARC_TLS_LE_HIX22,0,4,0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_TLS_LE_HIX22",false,0,0x003fffff, false),
285 HOWTO(R_SPARC_TLS_LE_LOX10,0,4,0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_TLS_LE_LOX10",false,0,0x000003ff, false),
286 HOWTO(R_SPARC_TLS_DTPMOD32,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_DTPMOD32",false,0,0x00000000,true),
287 HOWTO(R_SPARC_TLS_DTPMOD64,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_DTPMOD64",false,0,0x00000000,true),
288 HOWTO(R_SPARC_TLS_DTPOFF32,0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_TLS_DTPOFF32",false,0,0xffffffff,true),
289 HOWTO(R_SPARC_TLS_DTPOFF64,0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_TLS_DTPOFF64",false,0,MINUS_ONE,true),
290 HOWTO(R_SPARC_TLS_TPOFF32,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_TPOFF32",false,0,0x00000000,true),
291 HOWTO(R_SPARC_TLS_TPOFF64,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_TPOFF64",false,0,0x00000000,true),
292 HOWTO(R_SPARC_GOTDATA_HIX22,0,4,0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_GOTDATA_HIX22",false,0,0x003fffff, false),
293 HOWTO(R_SPARC_GOTDATA_LOX10,0,4,0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_GOTDATA_LOX10",false,0,0x000003ff, false),
294 HOWTO(R_SPARC_GOTDATA_OP_HIX22,0,4,0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_GOTDATA_OP_HIX22",false,0,0x003fffff, false),
295 HOWTO(R_SPARC_GOTDATA_OP_LOX10,0,4,0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_GOTDATA_OP_LOX10",false,0,0x000003ff, false),
296 HOWTO(R_SPARC_GOTDATA_OP,0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOTDATA_OP",false,0,0x00000000,true),
297 HOWTO(R_SPARC_H34,12,4,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc,"R_SPARC_H34",false,0,0x003fffff,false),
298 HOWTO(R_SPARC_SIZE32,0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_SIZE32",false,0,0xffffffff,true),
299 HOWTO(R_SPARC_SIZE64,0,8,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_SIZE64",false,0,MINUS_ONE, true),
300 HOWTO(R_SPARC_WDISP10,2,4,10,true, 0,complain_overflow_signed,sparc_elf_wdisp10_reloc,"R_SPARC_WDISP10",false,0,0x00000000,true),
301 };
302 static reloc_howto_type sparc_jmp_irel_howto =
303 HOWTO(R_SPARC_JMP_IREL, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_IREL",false,0,0x00000000,true);
304 static reloc_howto_type sparc_irelative_howto =
305 HOWTO(R_SPARC_IRELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_IRELATIVE",false,0,0x00000000,true);
306 static reloc_howto_type sparc_vtinherit_howto =
307 HOWTO (R_SPARC_GNU_VTINHERIT, 0,4,0,false,0,complain_overflow_dont, NULL, "R_SPARC_GNU_VTINHERIT", false,0, 0, false);
308 static reloc_howto_type sparc_vtentry_howto =
309 HOWTO (R_SPARC_GNU_VTENTRY, 0,4,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_SPARC_GNU_VTENTRY", false,0,0, false);
310 static reloc_howto_type sparc_rev32_howto =
311 HOWTO(R_SPARC_REV32, 0,4,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_REV32", false,0,0xffffffff,true);
312
313 reloc_howto_type *
_bfd_sparc_elf_reloc_type_lookup(bfd * abfd,bfd_reloc_code_real_type code)314 _bfd_sparc_elf_reloc_type_lookup (bfd *abfd,
315 bfd_reloc_code_real_type code)
316 {
317 /* We explicitly handle each relocation type in the switch
318 instead of using a lookup table for efficiency. */
319 switch (code)
320 {
321 case BFD_RELOC_NONE:
322 return &_bfd_sparc_elf_howto_table[R_SPARC_NONE];
323
324 case BFD_RELOC_8:
325 return &_bfd_sparc_elf_howto_table[R_SPARC_8];
326
327 case BFD_RELOC_16:
328 return &_bfd_sparc_elf_howto_table[R_SPARC_16];
329
330 case BFD_RELOC_32:
331 return &_bfd_sparc_elf_howto_table[R_SPARC_32];
332
333 case BFD_RELOC_8_PCREL:
334 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP8];
335
336 case BFD_RELOC_16_PCREL:
337 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP16];
338
339 case BFD_RELOC_32_PCREL:
340 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP32];
341
342 case BFD_RELOC_32_PCREL_S2:
343 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP30];
344
345 case BFD_RELOC_SPARC_WDISP22:
346 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP22];
347
348 case BFD_RELOC_HI22:
349 return &_bfd_sparc_elf_howto_table[R_SPARC_HI22];
350
351 case BFD_RELOC_SPARC22:
352 return &_bfd_sparc_elf_howto_table[R_SPARC_22];
353
354 case BFD_RELOC_SPARC13:
355 return &_bfd_sparc_elf_howto_table[R_SPARC_13];
356
357 case BFD_RELOC_LO10:
358 return &_bfd_sparc_elf_howto_table[R_SPARC_LO10];
359
360 case BFD_RELOC_SPARC_GOT10:
361 return &_bfd_sparc_elf_howto_table[R_SPARC_GOT10];
362
363 case BFD_RELOC_SPARC_GOT13:
364 return &_bfd_sparc_elf_howto_table[R_SPARC_GOT13];
365
366 case BFD_RELOC_SPARC_GOT22:
367 return &_bfd_sparc_elf_howto_table[R_SPARC_GOT22];
368
369 case BFD_RELOC_SPARC_PC10:
370 return &_bfd_sparc_elf_howto_table[R_SPARC_PC10];
371
372 case BFD_RELOC_SPARC_PC22:
373 return &_bfd_sparc_elf_howto_table[R_SPARC_PC22];
374
375 case BFD_RELOC_SPARC_WPLT30:
376 return &_bfd_sparc_elf_howto_table[R_SPARC_WPLT30];
377
378 case BFD_RELOC_SPARC_COPY:
379 return &_bfd_sparc_elf_howto_table[R_SPARC_COPY];
380
381 case BFD_RELOC_SPARC_GLOB_DAT:
382 return &_bfd_sparc_elf_howto_table[R_SPARC_GLOB_DAT];
383
384 case BFD_RELOC_SPARC_JMP_SLOT:
385 return &_bfd_sparc_elf_howto_table[R_SPARC_JMP_SLOT];
386
387 case BFD_RELOC_SPARC_RELATIVE:
388 return &_bfd_sparc_elf_howto_table[R_SPARC_RELATIVE];
389
390 case BFD_RELOC_SPARC_UA32:
391 return &_bfd_sparc_elf_howto_table[R_SPARC_UA32];
392
393 case BFD_RELOC_SPARC_PLT32:
394 return &_bfd_sparc_elf_howto_table[R_SPARC_PLT32];
395
396 case BFD_RELOC_SPARC_10:
397 return &_bfd_sparc_elf_howto_table[R_SPARC_10];
398
399 case BFD_RELOC_SPARC_11:
400 return &_bfd_sparc_elf_howto_table[R_SPARC_11];
401
402 case BFD_RELOC_SPARC_64:
403 return &_bfd_sparc_elf_howto_table[R_SPARC_64];
404
405 case BFD_RELOC_SPARC_OLO10:
406 return &_bfd_sparc_elf_howto_table[R_SPARC_OLO10];
407
408 case BFD_RELOC_SPARC_HH22:
409 return &_bfd_sparc_elf_howto_table[R_SPARC_HH22];
410
411 case BFD_RELOC_SPARC_HM10:
412 return &_bfd_sparc_elf_howto_table[R_SPARC_HM10];
413
414 case BFD_RELOC_SPARC_LM22:
415 return &_bfd_sparc_elf_howto_table[R_SPARC_LM22];
416
417 case BFD_RELOC_SPARC_PC_HH22:
418 return &_bfd_sparc_elf_howto_table[R_SPARC_PC_HH22];
419
420 case BFD_RELOC_SPARC_PC_HM10:
421 return &_bfd_sparc_elf_howto_table[R_SPARC_PC_HM10];
422
423 case BFD_RELOC_SPARC_PC_LM22:
424 return &_bfd_sparc_elf_howto_table[R_SPARC_PC_LM22];
425
426 case BFD_RELOC_SPARC_WDISP16:
427 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP16];
428
429 case BFD_RELOC_SPARC_WDISP19:
430 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP19];
431
432 case BFD_RELOC_SPARC_7:
433 return &_bfd_sparc_elf_howto_table[R_SPARC_7];
434
435 case BFD_RELOC_SPARC_5:
436 return &_bfd_sparc_elf_howto_table[R_SPARC_5];
437
438 case BFD_RELOC_SPARC_6:
439 return &_bfd_sparc_elf_howto_table[R_SPARC_6];
440
441 case BFD_RELOC_SPARC_DISP64:
442 return &_bfd_sparc_elf_howto_table[R_SPARC_DISP64];
443
444 case BFD_RELOC_SPARC_PLT64:
445 return &_bfd_sparc_elf_howto_table[R_SPARC_PLT64];
446
447 case BFD_RELOC_SPARC_HIX22:
448 return &_bfd_sparc_elf_howto_table[R_SPARC_HIX22];
449
450 case BFD_RELOC_SPARC_LOX10:
451 return &_bfd_sparc_elf_howto_table[R_SPARC_LOX10];
452
453 case BFD_RELOC_SPARC_H44:
454 return &_bfd_sparc_elf_howto_table[R_SPARC_H44];
455
456 case BFD_RELOC_SPARC_M44:
457 return &_bfd_sparc_elf_howto_table[R_SPARC_M44];
458
459 case BFD_RELOC_SPARC_L44:
460 return &_bfd_sparc_elf_howto_table[R_SPARC_L44];
461
462 case BFD_RELOC_SPARC_REGISTER:
463 return &_bfd_sparc_elf_howto_table[R_SPARC_REGISTER];
464
465 case BFD_RELOC_SPARC_UA64:
466 return &_bfd_sparc_elf_howto_table[R_SPARC_UA64];
467
468 case BFD_RELOC_SPARC_UA16:
469 return &_bfd_sparc_elf_howto_table[R_SPARC_UA16];
470
471 case BFD_RELOC_SPARC_TLS_GD_HI22:
472 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_HI22];
473
474 case BFD_RELOC_SPARC_TLS_GD_LO10:
475 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_LO10];
476
477 case BFD_RELOC_SPARC_TLS_GD_ADD:
478 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_ADD];
479
480 case BFD_RELOC_SPARC_TLS_GD_CALL:
481 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_GD_CALL];
482
483 case BFD_RELOC_SPARC_TLS_LDM_HI22:
484 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_HI22];
485
486 case BFD_RELOC_SPARC_TLS_LDM_LO10:
487 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_LO10];
488
489 case BFD_RELOC_SPARC_TLS_LDM_ADD:
490 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_ADD];
491
492 case BFD_RELOC_SPARC_TLS_LDM_CALL:
493 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDM_CALL];
494
495 case BFD_RELOC_SPARC_TLS_LDO_HIX22:
496 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDO_HIX22];
497
498 case BFD_RELOC_SPARC_TLS_LDO_LOX10:
499 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDO_LOX10];
500
501 case BFD_RELOC_SPARC_TLS_LDO_ADD:
502 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LDO_ADD];
503
504 case BFD_RELOC_SPARC_TLS_IE_HI22:
505 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_HI22];
506
507 case BFD_RELOC_SPARC_TLS_IE_LO10:
508 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_LO10];
509
510 case BFD_RELOC_SPARC_TLS_IE_LD:
511 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_LD];
512
513 case BFD_RELOC_SPARC_TLS_IE_LDX:
514 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_LDX];
515
516 case BFD_RELOC_SPARC_TLS_IE_ADD:
517 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_IE_ADD];
518
519 case BFD_RELOC_SPARC_TLS_LE_HIX22:
520 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LE_HIX22];
521
522 case BFD_RELOC_SPARC_TLS_LE_LOX10:
523 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_LE_LOX10];
524
525 case BFD_RELOC_SPARC_TLS_DTPMOD32:
526 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPMOD32];
527
528 case BFD_RELOC_SPARC_TLS_DTPMOD64:
529 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPMOD64];
530
531 case BFD_RELOC_SPARC_TLS_DTPOFF32:
532 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPOFF32];
533
534 case BFD_RELOC_SPARC_TLS_DTPOFF64:
535 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_DTPOFF64];
536
537 case BFD_RELOC_SPARC_TLS_TPOFF32:
538 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_TPOFF32];
539
540 case BFD_RELOC_SPARC_TLS_TPOFF64:
541 return &_bfd_sparc_elf_howto_table[R_SPARC_TLS_TPOFF64];
542
543 case BFD_RELOC_SPARC_GOTDATA_HIX22:
544 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_HIX22];
545
546 case BFD_RELOC_SPARC_GOTDATA_LOX10:
547 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_LOX10];
548
549 case BFD_RELOC_SPARC_GOTDATA_OP_HIX22:
550 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_OP_HIX22];
551
552 case BFD_RELOC_SPARC_GOTDATA_OP_LOX10:
553 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_OP_LOX10];
554
555 case BFD_RELOC_SPARC_GOTDATA_OP:
556 return &_bfd_sparc_elf_howto_table[R_SPARC_GOTDATA_OP];
557
558 case BFD_RELOC_SPARC_H34:
559 return &_bfd_sparc_elf_howto_table[R_SPARC_H34];
560
561 case BFD_RELOC_SPARC_SIZE32:
562 return &_bfd_sparc_elf_howto_table[R_SPARC_SIZE32];
563
564 case BFD_RELOC_SPARC_SIZE64:
565 return &_bfd_sparc_elf_howto_table[R_SPARC_SIZE64];
566
567 case BFD_RELOC_SPARC_WDISP10:
568 return &_bfd_sparc_elf_howto_table[R_SPARC_WDISP10];
569
570 case BFD_RELOC_SPARC_JMP_IREL:
571 return &sparc_jmp_irel_howto;
572
573 case BFD_RELOC_SPARC_IRELATIVE:
574 return &sparc_irelative_howto;
575
576 case BFD_RELOC_VTABLE_INHERIT:
577 return &sparc_vtinherit_howto;
578
579 case BFD_RELOC_VTABLE_ENTRY:
580 return &sparc_vtentry_howto;
581
582 case BFD_RELOC_SPARC_REV32:
583 return &sparc_rev32_howto;
584
585 default:
586 break;
587 }
588 /* xgettext:c-format */
589 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
590 bfd_set_error (bfd_error_bad_value);
591 return NULL;
592 }
593
594 reloc_howto_type *
_bfd_sparc_elf_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)595 _bfd_sparc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
596 const char *r_name)
597 {
598 unsigned int i;
599
600 for (i = 0; i < ARRAY_SIZE (_bfd_sparc_elf_howto_table); i++)
601 if (_bfd_sparc_elf_howto_table[i].name != NULL
602 && strcasecmp (_bfd_sparc_elf_howto_table[i].name, r_name) == 0)
603 return &_bfd_sparc_elf_howto_table[i];
604
605 if (strcasecmp (sparc_vtinherit_howto.name, r_name) == 0)
606 return &sparc_vtinherit_howto;
607 if (strcasecmp (sparc_vtentry_howto.name, r_name) == 0)
608 return &sparc_vtentry_howto;
609 if (strcasecmp (sparc_rev32_howto.name, r_name) == 0)
610 return &sparc_rev32_howto;
611
612 return NULL;
613 }
614
615 reloc_howto_type *
_bfd_sparc_elf_info_to_howto_ptr(bfd * abfd ATTRIBUTE_UNUSED,unsigned int r_type)616 _bfd_sparc_elf_info_to_howto_ptr (bfd *abfd ATTRIBUTE_UNUSED,
617 unsigned int r_type)
618 {
619 switch (r_type)
620 {
621 case R_SPARC_JMP_IREL:
622 return &sparc_jmp_irel_howto;
623
624 case R_SPARC_IRELATIVE:
625 return &sparc_irelative_howto;
626
627 case R_SPARC_GNU_VTINHERIT:
628 return &sparc_vtinherit_howto;
629
630 case R_SPARC_GNU_VTENTRY:
631 return &sparc_vtentry_howto;
632
633 case R_SPARC_REV32:
634 return &sparc_rev32_howto;
635
636 default:
637 if (r_type >= (unsigned int) R_SPARC_max_std)
638 {
639 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
640 abfd, r_type);
641 bfd_set_error (bfd_error_bad_value);
642 return NULL;
643 }
644 return &_bfd_sparc_elf_howto_table[r_type];
645 }
646 }
647
648 /* Both 32-bit and 64-bit sparc encode this in an identical manner,
649 so just take advantage of that. */
650 #define SPARC_ELF_R_TYPE(r_info) \
651 ((r_info) & 0xff)
652
653 bool
_bfd_sparc_elf_info_to_howto(bfd * abfd,arelent * cache_ptr,Elf_Internal_Rela * dst)654 _bfd_sparc_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
655 Elf_Internal_Rela *dst)
656 {
657 unsigned int r_type = SPARC_ELF_R_TYPE (dst->r_info);
658
659 if ((cache_ptr->howto = _bfd_sparc_elf_info_to_howto_ptr (abfd, r_type)) == NULL)
660 {
661 bfd_set_error (bfd_error_bad_value);
662 return false;
663 }
664 return true;
665 }
666
667
668 /* The nop opcode we use. */
669 #define SPARC_NOP 0x01000000
670
671 #define SPARC_INSN_BYTES 4
672
673 /* Is an undefined weak symbol resolved to 0 ?
674 Reference to an undefined weak symbol is resolved to 0 when
675 building an executable if it isn't dynamic and
676 1. Has non-GOT/non-PLT relocations in text section.
677 Or
678 2. Has no GOT/PLT relocation. */
679 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \
680 ((EH)->elf.root.type == bfd_link_hash_undefweak \
681 && bfd_link_executable (INFO) \
682 && (_bfd_sparc_elf_hash_table (INFO)->interp == NULL \
683 || !(INFO)->dynamic_undefined_weak \
684 || (EH)->has_non_got_reloc \
685 || !(EH)->has_got_reloc))
686
687 /* SPARC ELF linker hash entry. */
688
689 struct _bfd_sparc_elf_link_hash_entry
690 {
691 struct elf_link_hash_entry elf;
692
693 #define GOT_UNKNOWN 0
694 #define GOT_NORMAL 1
695 #define GOT_TLS_GD 2
696 #define GOT_TLS_IE 3
697 unsigned char tls_type;
698
699 /* Symbol has GOT or PLT relocations. */
700 unsigned int has_got_reloc : 1;
701
702 /* Symbol has old-style, non-relaxable GOT relocations. */
703 unsigned int has_old_style_got_reloc : 1;
704
705 /* Symbol has non-GOT/non-PLT relocations in text sections. */
706 unsigned int has_non_got_reloc : 1;
707
708 };
709
710 #define _bfd_sparc_elf_hash_entry(ent) ((struct _bfd_sparc_elf_link_hash_entry *)(ent))
711
712 struct _bfd_sparc_elf_obj_tdata
713 {
714 struct elf_obj_tdata root;
715
716 /* tls_type for each local got entry. */
717 char *local_got_tls_type;
718
719 /* TRUE if TLS GD relocs has been seen for this object. */
720 bool has_tlsgd;
721 };
722
723 #define _bfd_sparc_elf_tdata(abfd) \
724 ((struct _bfd_sparc_elf_obj_tdata *) (abfd)->tdata.any)
725
726 #define _bfd_sparc_elf_local_got_tls_type(abfd) \
727 (_bfd_sparc_elf_tdata (abfd)->local_got_tls_type)
728
729 #define is_sparc_elf(bfd) \
730 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
731 && elf_tdata (bfd) != NULL \
732 && elf_object_id (bfd) == SPARC_ELF_DATA)
733
734 bool
_bfd_sparc_elf_mkobject(bfd * abfd)735 _bfd_sparc_elf_mkobject (bfd *abfd)
736 {
737 return bfd_elf_allocate_object (abfd, sizeof (struct _bfd_sparc_elf_obj_tdata),
738 SPARC_ELF_DATA);
739 }
740
741 static void
sparc_put_word_32(bfd * abfd,bfd_vma val,void * ptr)742 sparc_put_word_32 (bfd *abfd, bfd_vma val, void *ptr)
743 {
744 bfd_put_32 (abfd, val, ptr);
745 }
746
747 static void
sparc_put_word_64(bfd * abfd,bfd_vma val,void * ptr)748 sparc_put_word_64 (bfd *abfd, bfd_vma val, void *ptr)
749 {
750 bfd_put_64 (abfd, val, ptr);
751 }
752
753 static void
sparc_elf_append_rela(bfd * abfd,asection * s,Elf_Internal_Rela * rel)754 sparc_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel)
755 {
756 const struct elf_backend_data *bed;
757 bfd_byte *loc;
758
759 bed = get_elf_backend_data (abfd);
760 BFD_ASSERT (s->reloc_count * bed->s->sizeof_rela < s->size);
761 loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela);
762 bed->s->swap_reloca_out (abfd, rel, loc);
763 }
764
765 static bfd_vma
sparc_elf_r_info_64(Elf_Internal_Rela * in_rel ATTRIBUTE_UNUSED,bfd_vma rel_index ATTRIBUTE_UNUSED,bfd_vma type ATTRIBUTE_UNUSED)766 sparc_elf_r_info_64 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED,
767 bfd_vma rel_index ATTRIBUTE_UNUSED,
768 bfd_vma type ATTRIBUTE_UNUSED)
769 {
770 return ELF64_R_INFO (rel_index,
771 (in_rel ?
772 ELF64_R_TYPE_INFO (ELF64_R_TYPE_DATA (in_rel->r_info),
773 type) : type));
774 }
775
776 static bfd_vma
sparc_elf_r_info_32(Elf_Internal_Rela * in_rel ATTRIBUTE_UNUSED,bfd_vma rel_index,bfd_vma type)777 sparc_elf_r_info_32 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED,
778 bfd_vma rel_index, bfd_vma type)
779 {
780 return ELF32_R_INFO (rel_index, type);
781 }
782
783 static bfd_vma
sparc_elf_r_symndx_64(bfd_vma r_info)784 sparc_elf_r_symndx_64 (bfd_vma r_info)
785 {
786 bfd_vma r_symndx = ELF32_R_SYM (r_info);
787 return (r_symndx >> 24);
788 }
789
790 static bfd_vma
sparc_elf_r_symndx_32(bfd_vma r_info)791 sparc_elf_r_symndx_32 (bfd_vma r_info)
792 {
793 return ELF32_R_SYM (r_info);
794 }
795
796 /* PLT/GOT stuff */
797
798 #define PLT32_ENTRY_SIZE 12
799 #define PLT32_HEADER_SIZE (4 * PLT32_ENTRY_SIZE)
800
801 /* The first four entries in a 32-bit procedure linkage table are reserved,
802 and the initial contents are unimportant (we zero them out).
803 Subsequent entries look like this. See the SVR4 ABI SPARC
804 supplement to see how this works. */
805
806 /* sethi %hi(.-.plt0),%g1. We fill in the address later. */
807 #define PLT32_ENTRY_WORD0 0x03000000
808 /* b,a .plt0. We fill in the offset later. */
809 #define PLT32_ENTRY_WORD1 0x30800000
810 /* nop. */
811 #define PLT32_ENTRY_WORD2 SPARC_NOP
812
813 static int
sparc32_plt_entry_build(bfd * output_bfd,asection * splt,bfd_vma offset,bfd_vma max ATTRIBUTE_UNUSED,bfd_vma * r_offset)814 sparc32_plt_entry_build (bfd *output_bfd, asection *splt, bfd_vma offset,
815 bfd_vma max ATTRIBUTE_UNUSED,
816 bfd_vma *r_offset)
817 {
818 bfd_put_32 (output_bfd,
819 PLT32_ENTRY_WORD0 + offset,
820 splt->contents + offset);
821 bfd_put_32 (output_bfd,
822 (PLT32_ENTRY_WORD1
823 + (((- (offset + 4)) >> 2) & 0x3fffff)),
824 splt->contents + offset + 4);
825 bfd_put_32 (output_bfd, (bfd_vma) PLT32_ENTRY_WORD2,
826 splt->contents + offset + 8);
827
828 *r_offset = offset;
829
830 return offset / PLT32_ENTRY_SIZE - 4;
831 }
832
833 /* Both the headers and the entries are icache aligned. */
834 #define PLT64_ENTRY_SIZE 32
835 #define PLT64_HEADER_SIZE (4 * PLT64_ENTRY_SIZE)
836 #define PLT64_LARGE_THRESHOLD 32768
837
838 static int
sparc64_plt_entry_build(bfd * output_bfd,asection * splt,bfd_vma offset,bfd_vma max,bfd_vma * r_offset)839 sparc64_plt_entry_build (bfd *output_bfd, asection *splt, bfd_vma offset,
840 bfd_vma max, bfd_vma *r_offset)
841 {
842 unsigned char *entry = splt->contents + offset;
843 const unsigned int nop = SPARC_NOP;
844 int plt_index;
845
846 if (offset < (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE))
847 {
848 unsigned int sethi, ba;
849
850 *r_offset = offset;
851
852 plt_index = (offset / PLT64_ENTRY_SIZE);
853
854 sethi = 0x03000000 | (plt_index * PLT64_ENTRY_SIZE);
855 ba = 0x30680000
856 | (((splt->contents + PLT64_ENTRY_SIZE) - (entry + 4)) / 4 & 0x7ffff);
857
858 bfd_put_32 (output_bfd, (bfd_vma) sethi, entry);
859 bfd_put_32 (output_bfd, (bfd_vma) ba, entry + 4);
860 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 8);
861 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 12);
862 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 16);
863 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 20);
864 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 24);
865 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 28);
866 }
867 else
868 {
869 unsigned char *ptr;
870 unsigned int ldx;
871 int block, last_block, ofs, last_ofs, chunks_this_block;
872 const int insn_chunk_size = (6 * 4);
873 const int ptr_chunk_size = (1 * 8);
874 const int entries_per_block = 160;
875 const int block_size = entries_per_block * (insn_chunk_size
876 + ptr_chunk_size);
877
878 /* Entries 32768 and higher are grouped into blocks of 160.
879 The blocks are further subdivided into 160 sequences of
880 6 instructions and 160 pointers. If a block does not require
881 the full 160 entries, let's say it requires N, then there
882 will be N sequences of 6 instructions and N pointers. */
883
884 offset -= (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE);
885 max -= (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE);
886
887 block = offset / block_size;
888 last_block = max / block_size;
889 if (block != last_block)
890 {
891 chunks_this_block = 160;
892 }
893 else
894 {
895 last_ofs = max % block_size;
896 chunks_this_block = last_ofs / (insn_chunk_size + ptr_chunk_size);
897 }
898
899 ofs = offset % block_size;
900
901 plt_index = (PLT64_LARGE_THRESHOLD +
902 (block * 160) +
903 (ofs / insn_chunk_size));
904
905 ptr = splt->contents
906 + (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE)
907 + (block * block_size)
908 + (chunks_this_block * insn_chunk_size)
909 + (ofs / insn_chunk_size) * ptr_chunk_size;
910
911 *r_offset = (bfd_vma) (ptr - splt->contents);
912
913 ldx = 0xc25be000 | ((ptr - (entry+4)) & 0x1fff);
914
915 /* mov %o7,%g5
916 call .+8
917 nop
918 ldx [%o7+P],%g1
919 jmpl %o7+%g1,%g1
920 mov %g5,%o7 */
921 bfd_put_32 (output_bfd, (bfd_vma) 0x8a10000f, entry);
922 bfd_put_32 (output_bfd, (bfd_vma) 0x40000002, entry + 4);
923 bfd_put_32 (output_bfd, (bfd_vma) SPARC_NOP, entry + 8);
924 bfd_put_32 (output_bfd, (bfd_vma) ldx, entry + 12);
925 bfd_put_32 (output_bfd, (bfd_vma) 0x83c3c001, entry + 16);
926 bfd_put_32 (output_bfd, (bfd_vma) 0x9e100005, entry + 20);
927
928 bfd_put_64 (output_bfd, (bfd_vma) (splt->contents - (entry + 4)), ptr);
929 }
930
931 return plt_index - 4;
932 }
933
934 /* The format of the first PLT entry in a VxWorks executable. */
935 static const bfd_vma sparc_vxworks_exec_plt0_entry[] =
936 {
937 0x05000000, /* sethi %hi(_GLOBAL_OFFSET_TABLE_+8), %g2 */
938 0x8410a000, /* or %g2, %lo(_GLOBAL_OFFSET_TABLE_+8), %g2 */
939 0xc4008000, /* ld [ %g2 ], %g2 */
940 0x81c08000, /* jmp %g2 */
941 0x01000000 /* nop */
942 };
943
944 /* The format of subsequent PLT entries. */
945 static const bfd_vma sparc_vxworks_exec_plt_entry[] =
946 {
947 0x03000000, /* sethi %hi(_GLOBAL_OFFSET_TABLE_+f@got), %g1 */
948 0x82106000, /* or %g1, %lo(_GLOBAL_OFFSET_TABLE_+f@got), %g1 */
949 0xc2004000, /* ld [ %g1 ], %g1 */
950 0x81c04000, /* jmp %g1 */
951 0x01000000, /* nop */
952 0x03000000, /* sethi %hi(f@pltindex), %g1 */
953 0x10800000, /* b _PLT_resolve */
954 0x82106000 /* or %g1, %lo(f@pltindex), %g1 */
955 };
956
957 /* The format of the first PLT entry in a VxWorks shared object. */
958 static const bfd_vma sparc_vxworks_shared_plt0_entry[] =
959 {
960 0xc405e008, /* ld [ %l7 + 8 ], %g2 */
961 0x81c08000, /* jmp %g2 */
962 0x01000000 /* nop */
963 };
964
965 /* The format of subsequent PLT entries. */
966 static const bfd_vma sparc_vxworks_shared_plt_entry[] =
967 {
968 0x03000000, /* sethi %hi(f@got), %g1 */
969 0x82106000, /* or %g1, %lo(f@got), %g1 */
970 0xc205c001, /* ld [ %l7 + %g1 ], %g1 */
971 0x81c04000, /* jmp %g1 */
972 0x01000000, /* nop */
973 0x03000000, /* sethi %hi(f@pltindex), %g1 */
974 0x10800000, /* b _PLT_resolve */
975 0x82106000 /* or %g1, %lo(f@pltindex), %g1 */
976 };
977
978 #define SPARC_ELF_PUT_WORD(htab, bfd, val, ptr) \
979 htab->put_word(bfd, val, ptr)
980
981 #define SPARC_ELF_R_INFO(htab, in_rel, index, type) \
982 htab->r_info(in_rel, index, type)
983
984 #define SPARC_ELF_R_SYMNDX(htab, r_info) \
985 htab->r_symndx(r_info)
986
987 #define SPARC_ELF_WORD_BYTES(htab) \
988 htab->bytes_per_word
989
990 #define SPARC_ELF_RELA_BYTES(htab) \
991 htab->bytes_per_rela
992
993 #define SPARC_ELF_DTPOFF_RELOC(htab) \
994 htab->dtpoff_reloc
995
996 #define SPARC_ELF_DTPMOD_RELOC(htab) \
997 htab->dtpmod_reloc
998
999 #define SPARC_ELF_TPOFF_RELOC(htab) \
1000 htab->tpoff_reloc
1001
1002 #define SPARC_ELF_BUILD_PLT_ENTRY(htab, obfd, splt, off, max, r_off) \
1003 htab->build_plt_entry (obfd, splt, off, max, r_off)
1004
1005 /* Create an entry in an SPARC ELF linker hash table. */
1006
1007 static struct bfd_hash_entry *
link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)1008 link_hash_newfunc (struct bfd_hash_entry *entry,
1009 struct bfd_hash_table *table, const char *string)
1010 {
1011 /* Allocate the structure if it has not already been allocated by a
1012 subclass. */
1013 if (entry == NULL)
1014 {
1015 entry = bfd_hash_allocate (table,
1016 sizeof (struct _bfd_sparc_elf_link_hash_entry));
1017 if (entry == NULL)
1018 return entry;
1019 }
1020
1021 /* Call the allocation method of the superclass. */
1022 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1023 if (entry != NULL)
1024 {
1025 struct _bfd_sparc_elf_link_hash_entry *eh;
1026
1027 eh = (struct _bfd_sparc_elf_link_hash_entry *) entry;
1028 eh->tls_type = GOT_UNKNOWN;
1029 eh->has_got_reloc = 0;
1030 eh->has_non_got_reloc = 0;
1031 }
1032
1033 return entry;
1034 }
1035
1036 /* The name of the dynamic interpreter. This is put in the .interp
1037 section. */
1038
1039 #define ELF32_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1040 #define ELF64_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1"
1041
1042 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1043 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1044 as global symbol. We reuse indx and dynstr_index for local symbol
1045 hash since they aren't used by global symbols in this backend. */
1046
1047 static hashval_t
elf_sparc_local_htab_hash(const void * ptr)1048 elf_sparc_local_htab_hash (const void *ptr)
1049 {
1050 struct elf_link_hash_entry *h
1051 = (struct elf_link_hash_entry *) ptr;
1052 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1053 }
1054
1055 /* Compare local hash entries. */
1056
1057 static int
elf_sparc_local_htab_eq(const void * ptr1,const void * ptr2)1058 elf_sparc_local_htab_eq (const void *ptr1, const void *ptr2)
1059 {
1060 struct elf_link_hash_entry *h1
1061 = (struct elf_link_hash_entry *) ptr1;
1062 struct elf_link_hash_entry *h2
1063 = (struct elf_link_hash_entry *) ptr2;
1064
1065 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
1066 }
1067
1068 /* Find and/or create a hash entry for local symbol. */
1069
1070 static struct elf_link_hash_entry *
elf_sparc_get_local_sym_hash(struct _bfd_sparc_elf_link_hash_table * htab,bfd * abfd,const Elf_Internal_Rela * rel,bool create)1071 elf_sparc_get_local_sym_hash (struct _bfd_sparc_elf_link_hash_table *htab,
1072 bfd *abfd, const Elf_Internal_Rela *rel,
1073 bool create)
1074 {
1075 struct _bfd_sparc_elf_link_hash_entry e, *ret;
1076 asection *sec = abfd->sections;
1077 unsigned long r_symndx;
1078 hashval_t h;
1079 void **slot;
1080
1081 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info);
1082 h = ELF_LOCAL_SYMBOL_HASH (sec->id, r_symndx);
1083
1084 e.elf.indx = sec->id;
1085 e.elf.dynstr_index = r_symndx;
1086 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
1087 create ? INSERT : NO_INSERT);
1088
1089 if (!slot)
1090 return NULL;
1091
1092 if (*slot)
1093 {
1094 ret = (struct _bfd_sparc_elf_link_hash_entry *) *slot;
1095 return &ret->elf;
1096 }
1097
1098 ret = (struct _bfd_sparc_elf_link_hash_entry *)
1099 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
1100 sizeof (struct _bfd_sparc_elf_link_hash_entry));
1101 if (ret)
1102 {
1103 memset (ret, 0, sizeof (*ret));
1104 ret->elf.indx = sec->id;
1105 ret->elf.dynstr_index = r_symndx;
1106 ret->elf.dynindx = -1;
1107 ret->elf.plt.offset = (bfd_vma) -1;
1108 ret->elf.got.offset = (bfd_vma) -1;
1109 *slot = ret;
1110 }
1111 return &ret->elf;
1112 }
1113
1114 /* Destroy a SPARC ELF linker hash table. */
1115
1116 static void
_bfd_sparc_elf_link_hash_table_free(bfd * obfd)1117 _bfd_sparc_elf_link_hash_table_free (bfd *obfd)
1118 {
1119 struct _bfd_sparc_elf_link_hash_table *htab
1120 = (struct _bfd_sparc_elf_link_hash_table *) obfd->link.hash;
1121
1122 if (htab->loc_hash_table)
1123 htab_delete (htab->loc_hash_table);
1124 if (htab->loc_hash_memory)
1125 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1126 _bfd_elf_link_hash_table_free (obfd);
1127 }
1128
1129 /* Create a SPARC ELF linker hash table. */
1130
1131 struct bfd_link_hash_table *
_bfd_sparc_elf_link_hash_table_create(bfd * abfd)1132 _bfd_sparc_elf_link_hash_table_create (bfd *abfd)
1133 {
1134 struct _bfd_sparc_elf_link_hash_table *ret;
1135 size_t amt = sizeof (struct _bfd_sparc_elf_link_hash_table);
1136
1137 ret = (struct _bfd_sparc_elf_link_hash_table *) bfd_zmalloc (amt);
1138 if (ret == NULL)
1139 return NULL;
1140
1141 if (ABI_64_P (abfd))
1142 {
1143 ret->put_word = sparc_put_word_64;
1144 ret->r_info = sparc_elf_r_info_64;
1145 ret->r_symndx = sparc_elf_r_symndx_64;
1146 ret->dtpoff_reloc = R_SPARC_TLS_DTPOFF64;
1147 ret->dtpmod_reloc = R_SPARC_TLS_DTPMOD64;
1148 ret->tpoff_reloc = R_SPARC_TLS_TPOFF64;
1149 ret->word_align_power = 3;
1150 ret->align_power_max = 4;
1151 ret->bytes_per_word = 8;
1152 ret->bytes_per_rela = sizeof (Elf64_External_Rela);
1153 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1154 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1155
1156 ret->build_plt_entry = sparc64_plt_entry_build;
1157 ret->plt_header_size = PLT64_HEADER_SIZE;
1158 ret->plt_entry_size = PLT64_ENTRY_SIZE;
1159 }
1160 else
1161 {
1162 ret->put_word = sparc_put_word_32;
1163 ret->r_info = sparc_elf_r_info_32;
1164 ret->r_symndx = sparc_elf_r_symndx_32;
1165 ret->dtpoff_reloc = R_SPARC_TLS_DTPOFF32;
1166 ret->dtpmod_reloc = R_SPARC_TLS_DTPMOD32;
1167 ret->tpoff_reloc = R_SPARC_TLS_TPOFF32;
1168 ret->word_align_power = 2;
1169 ret->align_power_max = 3;
1170 ret->bytes_per_word = 4;
1171 ret->bytes_per_rela = sizeof (Elf32_External_Rela);
1172 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1173 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1174
1175 ret->build_plt_entry = sparc32_plt_entry_build;
1176 ret->plt_header_size = PLT32_HEADER_SIZE;
1177 ret->plt_entry_size = PLT32_ENTRY_SIZE;
1178 }
1179
1180 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
1181 sizeof (struct _bfd_sparc_elf_link_hash_entry),
1182 SPARC_ELF_DATA))
1183 {
1184 free (ret);
1185 return NULL;
1186 }
1187
1188 ret->loc_hash_table = htab_try_create (1024,
1189 elf_sparc_local_htab_hash,
1190 elf_sparc_local_htab_eq,
1191 NULL);
1192 ret->loc_hash_memory = objalloc_create ();
1193 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1194 {
1195 _bfd_sparc_elf_link_hash_table_free (abfd);
1196 return NULL;
1197 }
1198 ret->elf.root.hash_table_free = _bfd_sparc_elf_link_hash_table_free;
1199
1200 return &ret->elf.root;
1201 }
1202
1203 /* Create .plt, .rela.plt, .got, .rela.got, .dynbss, and
1204 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1205 hash table. */
1206
1207 bool
_bfd_sparc_elf_create_dynamic_sections(bfd * dynobj,struct bfd_link_info * info)1208 _bfd_sparc_elf_create_dynamic_sections (bfd *dynobj,
1209 struct bfd_link_info *info)
1210 {
1211 struct _bfd_sparc_elf_link_hash_table *htab;
1212
1213 htab = _bfd_sparc_elf_hash_table (info);
1214 BFD_ASSERT (htab != NULL);
1215
1216 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1217 return false;
1218
1219 if (htab->elf.target_os == is_vxworks)
1220 {
1221 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
1222 return false;
1223 if (bfd_link_pic (info))
1224 {
1225 htab->plt_header_size
1226 = 4 * ARRAY_SIZE (sparc_vxworks_shared_plt0_entry);
1227 htab->plt_entry_size
1228 = 4 * ARRAY_SIZE (sparc_vxworks_shared_plt_entry);
1229 }
1230 else
1231 {
1232 htab->plt_header_size
1233 = 4 * ARRAY_SIZE (sparc_vxworks_exec_plt0_entry);
1234 htab->plt_entry_size
1235 = 4 * ARRAY_SIZE (sparc_vxworks_exec_plt_entry);
1236 }
1237 }
1238
1239 if (!htab->elf.splt || !htab->elf.srelplt || !htab->elf.sdynbss
1240 || (!bfd_link_pic (info) && !htab->elf.srelbss))
1241 abort ();
1242
1243 return true;
1244 }
1245
1246 static bool
create_ifunc_sections(bfd * abfd,struct bfd_link_info * info)1247 create_ifunc_sections (bfd *abfd, struct bfd_link_info *info)
1248 {
1249 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1250 struct elf_link_hash_table *htab = elf_hash_table (info);
1251 flagword flags, pltflags;
1252 asection *s;
1253
1254 if (htab->irelifunc != NULL || htab->iplt != NULL)
1255 return true;
1256
1257 flags = bed->dynamic_sec_flags;
1258 pltflags = flags | SEC_ALLOC | SEC_CODE | SEC_LOAD;
1259
1260 s = bfd_make_section_with_flags (abfd, ".iplt", pltflags);
1261 if (s == NULL
1262 || !bfd_set_section_alignment (s, bed->plt_alignment))
1263 return false;
1264 htab->iplt = s;
1265
1266 s = bfd_make_section_with_flags (abfd, ".rela.iplt",
1267 flags | SEC_READONLY);
1268 if (s == NULL
1269 || !bfd_set_section_alignment (s, bed->s->log_file_align))
1270 return false;
1271 htab->irelplt = s;
1272
1273 return true;
1274 }
1275
1276 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1277
1278 void
_bfd_sparc_elf_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)1279 _bfd_sparc_elf_copy_indirect_symbol (struct bfd_link_info *info,
1280 struct elf_link_hash_entry *dir,
1281 struct elf_link_hash_entry *ind)
1282 {
1283 struct _bfd_sparc_elf_link_hash_entry *edir, *eind;
1284
1285 edir = (struct _bfd_sparc_elf_link_hash_entry *) dir;
1286 eind = (struct _bfd_sparc_elf_link_hash_entry *) ind;
1287
1288 if (ind->root.type == bfd_link_hash_indirect && dir->got.refcount <= 0)
1289 {
1290 edir->tls_type = eind->tls_type;
1291 eind->tls_type = GOT_UNKNOWN;
1292 }
1293
1294 /* Copy has_got_reloc and has_non_got_reloc. */
1295 edir->has_got_reloc |= eind->has_got_reloc;
1296 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1297
1298 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1299 }
1300
1301 static int
sparc_elf_tls_transition(struct bfd_link_info * info,bfd * abfd,int r_type,int is_local)1302 sparc_elf_tls_transition (struct bfd_link_info *info, bfd *abfd,
1303 int r_type, int is_local)
1304 {
1305 if (! ABI_64_P (abfd)
1306 && r_type == R_SPARC_TLS_GD_HI22
1307 && ! _bfd_sparc_elf_tdata (abfd)->has_tlsgd)
1308 return R_SPARC_REV32;
1309
1310 if (!bfd_link_executable (info))
1311 return r_type;
1312
1313 switch (r_type)
1314 {
1315 case R_SPARC_TLS_GD_HI22:
1316 return is_local ? R_SPARC_TLS_LE_HIX22 : R_SPARC_TLS_IE_HI22;
1317 case R_SPARC_TLS_GD_LO10:
1318 return is_local ? R_SPARC_TLS_LE_LOX10 : R_SPARC_TLS_IE_LO10;
1319 case R_SPARC_TLS_LDM_HI22:
1320 return R_SPARC_TLS_LE_HIX22;
1321 case R_SPARC_TLS_LDM_LO10:
1322 return R_SPARC_TLS_LE_LOX10;
1323 case R_SPARC_TLS_IE_HI22:
1324 return is_local ? R_SPARC_TLS_LE_HIX22 : r_type;
1325 case R_SPARC_TLS_IE_LO10:
1326 return is_local ? R_SPARC_TLS_LE_LOX10 : r_type;
1327 }
1328
1329 return r_type;
1330 }
1331
1332 /* Look through the relocs for a section during the first phase, and
1333 allocate space in the global offset table or procedure linkage
1334 table. */
1335
1336 bool
_bfd_sparc_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)1337 _bfd_sparc_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
1338 asection *sec, const Elf_Internal_Rela *relocs)
1339 {
1340 struct _bfd_sparc_elf_link_hash_table *htab;
1341 Elf_Internal_Shdr *symtab_hdr;
1342 struct elf_link_hash_entry **sym_hashes;
1343 const Elf_Internal_Rela *rel;
1344 const Elf_Internal_Rela *rel_end;
1345 asection *sreloc;
1346 int num_relocs;
1347 bool checked_tlsgd = false;
1348
1349 if (bfd_link_relocatable (info))
1350 return true;
1351
1352 htab = _bfd_sparc_elf_hash_table (info);
1353 BFD_ASSERT (htab != NULL);
1354 symtab_hdr = &elf_symtab_hdr (abfd);
1355 sym_hashes = elf_sym_hashes (abfd);
1356
1357 sreloc = NULL;
1358
1359 if (ABI_64_P (abfd))
1360 num_relocs = NUM_SHDR_ENTRIES (_bfd_elf_single_rel_hdr (sec));
1361 else
1362 num_relocs = sec->reloc_count;
1363
1364 BFD_ASSERT (is_sparc_elf (abfd) || num_relocs == 0);
1365
1366 if (htab->elf.dynobj == NULL)
1367 htab->elf.dynobj = abfd;
1368 if (!create_ifunc_sections (htab->elf.dynobj, info))
1369 return false;
1370
1371 rel_end = relocs + num_relocs;
1372 for (rel = relocs; rel < rel_end; rel++)
1373 {
1374 unsigned int r_type;
1375 unsigned int r_symndx;
1376 struct elf_link_hash_entry *h;
1377 struct _bfd_sparc_elf_link_hash_entry *eh;
1378 Elf_Internal_Sym *isym;
1379
1380 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info);
1381 r_type = SPARC_ELF_R_TYPE (rel->r_info);
1382
1383 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1384 {
1385 /* xgettext:c-format */
1386 _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd, r_symndx);
1387 return false;
1388 }
1389
1390 isym = NULL;
1391 if (r_symndx < symtab_hdr->sh_info)
1392 {
1393 /* A local symbol. */
1394 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd,
1395 r_symndx);
1396 if (isym == NULL)
1397 return false;
1398
1399 /* Check relocation against local STT_GNU_IFUNC symbol. */
1400 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1401 {
1402 h = elf_sparc_get_local_sym_hash (htab, abfd, rel, true);
1403 if (h == NULL)
1404 return false;
1405
1406 /* Fake a STT_GNU_IFUNC symbol. */
1407 h->type = STT_GNU_IFUNC;
1408 h->def_regular = 1;
1409 h->ref_regular = 1;
1410 h->forced_local = 1;
1411 h->root.type = bfd_link_hash_defined;
1412 }
1413 else
1414 h = NULL;
1415 }
1416 else
1417 {
1418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1419 while (h->root.type == bfd_link_hash_indirect
1420 || h->root.type == bfd_link_hash_warning)
1421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1422 }
1423
1424 if (h && h->type == STT_GNU_IFUNC && h->def_regular)
1425 {
1426 h->ref_regular = 1;
1427 h->plt.refcount += 1;
1428 }
1429
1430 /* Compatibility with old R_SPARC_REV32 reloc conflicting
1431 with R_SPARC_TLS_GD_HI22. */
1432 if (! ABI_64_P (abfd) && ! checked_tlsgd)
1433 switch (r_type)
1434 {
1435 case R_SPARC_TLS_GD_HI22:
1436 {
1437 const Elf_Internal_Rela *relt;
1438
1439 for (relt = rel + 1; relt < rel_end; relt++)
1440 if (ELF32_R_TYPE (relt->r_info) == R_SPARC_TLS_GD_LO10
1441 || ELF32_R_TYPE (relt->r_info) == R_SPARC_TLS_GD_ADD
1442 || ELF32_R_TYPE (relt->r_info) == R_SPARC_TLS_GD_CALL)
1443 break;
1444 checked_tlsgd = true;
1445 _bfd_sparc_elf_tdata (abfd)->has_tlsgd = relt < rel_end;
1446 }
1447 break;
1448 case R_SPARC_TLS_GD_LO10:
1449 case R_SPARC_TLS_GD_ADD:
1450 case R_SPARC_TLS_GD_CALL:
1451 checked_tlsgd = true;
1452 _bfd_sparc_elf_tdata (abfd)->has_tlsgd = true;
1453 break;
1454 }
1455
1456 r_type = sparc_elf_tls_transition (info, abfd, r_type, h == NULL);
1457 eh = (struct _bfd_sparc_elf_link_hash_entry *) h;
1458
1459 switch (r_type)
1460 {
1461 case R_SPARC_TLS_LDM_HI22:
1462 case R_SPARC_TLS_LDM_LO10:
1463 htab->tls_ldm_got.refcount += 1;
1464 if (eh != NULL)
1465 eh->has_got_reloc = 1;
1466 break;
1467
1468 case R_SPARC_TLS_LE_HIX22:
1469 case R_SPARC_TLS_LE_LOX10:
1470 if (!bfd_link_executable (info))
1471 goto r_sparc_plt32;
1472 break;
1473
1474 case R_SPARC_TLS_IE_HI22:
1475 case R_SPARC_TLS_IE_LO10:
1476 if (!bfd_link_executable (info))
1477 info->flags |= DF_STATIC_TLS;
1478 /* Fall through */
1479
1480 case R_SPARC_GOT10:
1481 case R_SPARC_GOT13:
1482 case R_SPARC_GOT22:
1483 case R_SPARC_GOTDATA_HIX22:
1484 case R_SPARC_GOTDATA_LOX10:
1485 case R_SPARC_GOTDATA_OP_HIX22:
1486 case R_SPARC_GOTDATA_OP_LOX10:
1487 case R_SPARC_TLS_GD_HI22:
1488 case R_SPARC_TLS_GD_LO10:
1489 /* This symbol requires a global offset table entry. */
1490 {
1491 int tls_type, old_tls_type;
1492
1493 switch (r_type)
1494 {
1495 case R_SPARC_TLS_GD_HI22:
1496 case R_SPARC_TLS_GD_LO10:
1497 tls_type = GOT_TLS_GD;
1498 break;
1499 case R_SPARC_TLS_IE_HI22:
1500 case R_SPARC_TLS_IE_LO10:
1501 tls_type = GOT_TLS_IE;
1502 break;
1503 default:
1504 tls_type = GOT_NORMAL;
1505 break;
1506 }
1507
1508 if (h != NULL)
1509 {
1510 h->got.refcount += 1;
1511 old_tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type;
1512 }
1513 else
1514 {
1515 bfd_signed_vma *local_got_refcounts;
1516
1517 /* This is a global offset table entry for a local symbol. */
1518 local_got_refcounts = elf_local_got_refcounts (abfd);
1519 if (local_got_refcounts == NULL)
1520 {
1521 bfd_size_type size;
1522
1523 size = symtab_hdr->sh_info;
1524 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1525 local_got_refcounts = ((bfd_signed_vma *)
1526 bfd_zalloc (abfd, size));
1527 if (local_got_refcounts == NULL)
1528 return false;
1529 elf_local_got_refcounts (abfd) = local_got_refcounts;
1530 _bfd_sparc_elf_local_got_tls_type (abfd)
1531 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1532 }
1533
1534 if (r_type != R_SPARC_GOTDATA_OP_HIX22
1535 && r_type != R_SPARC_GOTDATA_OP_LOX10)
1536 local_got_refcounts[r_symndx] += 1;
1537
1538 old_tls_type
1539 = _bfd_sparc_elf_local_got_tls_type (abfd) [r_symndx];
1540 }
1541
1542 /* If a TLS symbol is accessed using IE at least once, there is no
1543 point in using the dynamic model for it. */
1544 if (old_tls_type != tls_type)
1545 {
1546 if (old_tls_type == GOT_UNKNOWN)
1547 ;
1548 else if (old_tls_type == GOT_TLS_GD && tls_type == GOT_TLS_IE)
1549 ;
1550 else if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD)
1551 tls_type = old_tls_type;
1552 else
1553 {
1554 _bfd_error_handler
1555 /* xgettext:c-format */
1556 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1557 abfd, h ? h->root.root.string : "<local>");
1558 return false;
1559 }
1560
1561 if (h != NULL)
1562 _bfd_sparc_elf_hash_entry (h)->tls_type = tls_type;
1563 else
1564 _bfd_sparc_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
1565 }
1566 }
1567
1568 if (!htab->elf.sgot
1569 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
1570 return false;
1571
1572 if (eh != NULL)
1573 {
1574 eh->has_got_reloc = 1;
1575 if (r_type == R_SPARC_GOT10
1576 || r_type == R_SPARC_GOT13
1577 || r_type == R_SPARC_GOT22)
1578 eh->has_old_style_got_reloc = 1;
1579 }
1580 break;
1581
1582 case R_SPARC_TLS_GD_CALL:
1583 case R_SPARC_TLS_LDM_CALL:
1584 if (bfd_link_executable (info))
1585 break;
1586
1587 /* Essentially R_SPARC_WPLT30 relocs against __tls_get_addr. */
1588 h = (struct elf_link_hash_entry *)
1589 bfd_link_hash_lookup (info->hash, "__tls_get_addr", false,
1590 false, true);
1591 BFD_ASSERT (h != NULL);
1592 /* Fall through */
1593
1594 case R_SPARC_WPLT30:
1595 case R_SPARC_PLT32:
1596 case R_SPARC_PLT64:
1597 case R_SPARC_HIPLT22:
1598 case R_SPARC_LOPLT10:
1599 case R_SPARC_PCPLT32:
1600 case R_SPARC_PCPLT22:
1601 case R_SPARC_PCPLT10:
1602 /* This symbol requires a procedure linkage table entry.
1603 We actually build the entry in adjust_dynamic_symbol,
1604 because this might be a case of linking PIC code without
1605 linking in any dynamic objects, in which case we don't
1606 need to generate a procedure linkage table after all. */
1607
1608 if (h == NULL)
1609 {
1610 if (! ABI_64_P (abfd))
1611 {
1612 /* The Solaris native assembler will generate a WPLT30
1613 reloc for a local symbol if you assemble a call from
1614 one section to another when using -K pic. We treat
1615 it as WDISP30. */
1616 if (r_type == R_SPARC_PLT32)
1617 goto r_sparc_plt32;
1618 break;
1619 }
1620 /* PR 7027: We need similar behaviour for 64-bit binaries. */
1621 else if (r_type == R_SPARC_WPLT30)
1622 break;
1623
1624 /* It does not make sense to have a procedure linkage
1625 table entry for a local symbol. */
1626 bfd_set_error (bfd_error_bad_value);
1627 return false;
1628 }
1629
1630 h->needs_plt = 1;
1631
1632 if (r_type == R_SPARC_PLT32 || r_type == R_SPARC_PLT64)
1633 goto r_sparc_plt32;
1634
1635 h->plt.refcount += 1;
1636
1637 eh = (struct _bfd_sparc_elf_link_hash_entry *) h;
1638 eh->has_got_reloc = 1;
1639 break;
1640
1641 case R_SPARC_PC10:
1642 case R_SPARC_PC22:
1643 case R_SPARC_PC_HH22:
1644 case R_SPARC_PC_HM10:
1645 case R_SPARC_PC_LM22:
1646 if (h != NULL)
1647 h->non_got_ref = 1;
1648
1649 if (h != NULL
1650 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1651 break;
1652 /* Fall through. */
1653
1654 case R_SPARC_DISP8:
1655 case R_SPARC_DISP16:
1656 case R_SPARC_DISP32:
1657 case R_SPARC_DISP64:
1658 case R_SPARC_WDISP30:
1659 case R_SPARC_WDISP22:
1660 case R_SPARC_WDISP19:
1661 case R_SPARC_WDISP16:
1662 case R_SPARC_WDISP10:
1663 case R_SPARC_8:
1664 case R_SPARC_16:
1665 case R_SPARC_32:
1666 case R_SPARC_HI22:
1667 case R_SPARC_22:
1668 case R_SPARC_13:
1669 case R_SPARC_LO10:
1670 case R_SPARC_UA16:
1671 case R_SPARC_UA32:
1672 case R_SPARC_10:
1673 case R_SPARC_11:
1674 case R_SPARC_64:
1675 case R_SPARC_OLO10:
1676 case R_SPARC_HH22:
1677 case R_SPARC_HM10:
1678 case R_SPARC_LM22:
1679 case R_SPARC_7:
1680 case R_SPARC_5:
1681 case R_SPARC_6:
1682 case R_SPARC_HIX22:
1683 case R_SPARC_LOX10:
1684 case R_SPARC_H44:
1685 case R_SPARC_M44:
1686 case R_SPARC_L44:
1687 case R_SPARC_H34:
1688 case R_SPARC_UA64:
1689 if (h != NULL)
1690 h->non_got_ref = 1;
1691
1692 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1693 eh->has_non_got_reloc = 1;
1694
1695 r_sparc_plt32:
1696 if (h != NULL && !bfd_link_pic (info))
1697 {
1698 /* We may need a .plt entry if the function this reloc
1699 refers to is in a shared lib. */
1700 h->plt.refcount += 1;
1701 }
1702
1703 /* If we are creating a shared library, and this is a reloc
1704 against a global symbol, or a non PC relative reloc
1705 against a local symbol, then we need to copy the reloc
1706 into the shared library. However, if we are linking with
1707 -Bsymbolic, we do not need to copy a reloc against a
1708 global symbol which is defined in an object we are
1709 including in the link (i.e., DEF_REGULAR is set). At
1710 this point we have not seen all the input files, so it is
1711 possible that DEF_REGULAR is not set now but will be set
1712 later (it is never cleared). In case of a weak definition,
1713 DEF_REGULAR may be cleared later by a strong definition in
1714 a shared library. We account for that possibility below by
1715 storing information in the relocs_copied field of the hash
1716 table entry. A similar situation occurs when creating
1717 shared libraries and symbol visibility changes render the
1718 symbol local.
1719
1720 If on the other hand, we are creating an executable, we
1721 may need to keep relocations for symbols satisfied by a
1722 dynamic library if we manage to avoid copy relocs for the
1723 symbol. */
1724 if ((bfd_link_pic (info)
1725 && (sec->flags & SEC_ALLOC) != 0
1726 && (! _bfd_sparc_elf_howto_table[r_type].pc_relative
1727 || (h != NULL
1728 && (! SYMBOLIC_BIND (info, h)
1729 || h->root.type == bfd_link_hash_defweak
1730 || !h->def_regular))))
1731 || (!bfd_link_pic (info)
1732 && (sec->flags & SEC_ALLOC) != 0
1733 && h != NULL
1734 && (h->root.type == bfd_link_hash_defweak
1735 || !h->def_regular))
1736 || (!bfd_link_pic (info)
1737 && h != NULL
1738 && h->type == STT_GNU_IFUNC))
1739 {
1740 struct elf_dyn_relocs *p;
1741 struct elf_dyn_relocs **head;
1742
1743 /* When creating a shared object, we must copy these
1744 relocs into the output file. We create a reloc
1745 section in dynobj and make room for the reloc. */
1746 if (sreloc == NULL)
1747 {
1748 sreloc = _bfd_elf_make_dynamic_reloc_section
1749 (sec, htab->elf.dynobj, htab->word_align_power,
1750 abfd, /*rela?*/ true);
1751
1752 if (sreloc == NULL)
1753 return false;
1754 }
1755
1756 /* If this is a global symbol, we count the number of
1757 relocations we need for this symbol. */
1758 if (h != NULL)
1759 head = &h->dyn_relocs;
1760 else
1761 {
1762 /* Track dynamic relocs needed for local syms too.
1763 We really need local syms available to do this
1764 easily. Oh well. */
1765 asection *s;
1766 void *vpp;
1767
1768 BFD_ASSERT (isym != NULL);
1769 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1770 if (s == NULL)
1771 s = sec;
1772
1773 vpp = &elf_section_data (s)->local_dynrel;
1774 head = (struct elf_dyn_relocs **) vpp;
1775 }
1776
1777 p = *head;
1778 if (p == NULL || p->sec != sec)
1779 {
1780 size_t amt = sizeof *p;
1781 p = ((struct elf_dyn_relocs *)
1782 bfd_alloc (htab->elf.dynobj, amt));
1783 if (p == NULL)
1784 return false;
1785 p->next = *head;
1786 *head = p;
1787 p->sec = sec;
1788 p->count = 0;
1789 p->pc_count = 0;
1790 }
1791
1792 p->count += 1;
1793 if (_bfd_sparc_elf_howto_table[r_type].pc_relative)
1794 p->pc_count += 1;
1795 }
1796
1797 break;
1798
1799 case R_SPARC_GNU_VTINHERIT:
1800 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1801 return false;
1802 break;
1803
1804 case R_SPARC_GNU_VTENTRY:
1805 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1806 return false;
1807 break;
1808
1809 case R_SPARC_REGISTER:
1810 /* Nothing to do. */
1811 break;
1812
1813 default:
1814 break;
1815 }
1816 }
1817
1818 return true;
1819 }
1820
1821 asection *
_bfd_sparc_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)1822 _bfd_sparc_elf_gc_mark_hook (asection *sec,
1823 struct bfd_link_info *info,
1824 Elf_Internal_Rela *rel,
1825 struct elf_link_hash_entry *h,
1826 Elf_Internal_Sym *sym)
1827 {
1828 if (h != NULL)
1829 switch (SPARC_ELF_R_TYPE (rel->r_info))
1830 {
1831 case R_SPARC_GNU_VTINHERIT:
1832 case R_SPARC_GNU_VTENTRY:
1833 return NULL;
1834 }
1835
1836 if (!bfd_link_executable (info))
1837 {
1838 switch (SPARC_ELF_R_TYPE (rel->r_info))
1839 {
1840 case R_SPARC_TLS_GD_CALL:
1841 case R_SPARC_TLS_LDM_CALL:
1842 /* This reloc implicitly references __tls_get_addr. We know
1843 another reloc will reference the same symbol as the one
1844 on this reloc, so the real symbol and section will be
1845 gc marked when processing the other reloc. That lets
1846 us handle __tls_get_addr here. */
1847 h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr",
1848 false, false, true);
1849 BFD_ASSERT (h != NULL);
1850 h->mark = 1;
1851 if (h->is_weakalias)
1852 weakdef (h)->mark = 1;
1853 sym = NULL;
1854 }
1855 }
1856
1857 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1858 }
1859
1860 static Elf_Internal_Rela *
sparc_elf_find_reloc_at_ofs(Elf_Internal_Rela * rel,Elf_Internal_Rela * relend,bfd_vma offset)1861 sparc_elf_find_reloc_at_ofs (Elf_Internal_Rela *rel,
1862 Elf_Internal_Rela *relend,
1863 bfd_vma offset)
1864 {
1865 while (rel < relend)
1866 {
1867 if (rel->r_offset == offset)
1868 return rel;
1869 rel++;
1870 }
1871 return NULL;
1872 }
1873
1874 /* Remove undefined weak symbol from the dynamic symbol table if it
1875 is resolved to 0. */
1876
1877 bool
_bfd_sparc_elf_fixup_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)1878 _bfd_sparc_elf_fixup_symbol (struct bfd_link_info *info,
1879 struct elf_link_hash_entry *h)
1880 {
1881 if (h->dynindx != -1
1882 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
1883 _bfd_sparc_elf_hash_entry (h)))
1884 {
1885 h->dynindx = -1;
1886 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1887 h->dynstr_index);
1888 }
1889 return true;
1890 }
1891
1892 /* Adjust a symbol defined by a dynamic object and referenced by a
1893 regular object. The current definition is in some section of the
1894 dynamic object, but we're not including those sections. We have to
1895 change the definition to something the rest of the link can
1896 understand. */
1897
1898 bool
_bfd_sparc_elf_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)1899 _bfd_sparc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
1900 struct elf_link_hash_entry *h)
1901 {
1902 struct _bfd_sparc_elf_link_hash_table *htab;
1903 asection *s, *srel;
1904
1905 htab = _bfd_sparc_elf_hash_table (info);
1906 BFD_ASSERT (htab != NULL);
1907
1908 /* Make sure we know what is going on here. */
1909 BFD_ASSERT (htab->elf.dynobj != NULL
1910 && (h->needs_plt
1911 || h->type == STT_GNU_IFUNC
1912 || h->is_weakalias
1913 || (h->def_dynamic
1914 && h->ref_regular
1915 && !h->def_regular)));
1916
1917 /* If this is a function, put it in the procedure linkage table. We
1918 will fill in the contents of the procedure linkage table later
1919 (although we could actually do it here). The STT_NOTYPE
1920 condition is a hack specifically for the Oracle libraries
1921 delivered for Solaris; for some inexplicable reason, they define
1922 some of their functions as STT_NOTYPE when they really should be
1923 STT_FUNC. */
1924 if (h->type == STT_FUNC
1925 || h->type == STT_GNU_IFUNC
1926 || h->needs_plt
1927 || (h->type == STT_NOTYPE
1928 && (h->root.type == bfd_link_hash_defined
1929 || h->root.type == bfd_link_hash_defweak)
1930 && (h->root.u.def.section->flags & SEC_CODE) != 0))
1931 {
1932 if (h->plt.refcount <= 0
1933 || (h->type != STT_GNU_IFUNC
1934 && (SYMBOL_CALLS_LOCAL (info, h)
1935 || (h->root.type == bfd_link_hash_undefweak
1936 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))))
1937 {
1938 /* This case can occur if we saw a WPLT30 reloc in an input
1939 file, but the symbol was never referred to by a dynamic
1940 object, or if all references were garbage collected. In
1941 such a case, we don't actually need to build a procedure
1942 linkage table, and we can just do a WDISP30 reloc instead. */
1943 h->plt.offset = (bfd_vma) -1;
1944 h->needs_plt = 0;
1945 }
1946
1947 return true;
1948 }
1949 else
1950 h->plt.offset = (bfd_vma) -1;
1951
1952 /* If this is a weak symbol, and there is a real definition, the
1953 processor independent code will have arranged for us to see the
1954 real definition first, and we can just use the same value. */
1955 if (h->is_weakalias)
1956 {
1957 struct elf_link_hash_entry *def = weakdef (h);
1958 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1959 h->root.u.def.section = def->root.u.def.section;
1960 h->root.u.def.value = def->root.u.def.value;
1961 return true;
1962 }
1963
1964 /* This is a reference to a symbol defined by a dynamic object which
1965 is not a function. */
1966
1967 /* If we are creating a shared library, we must presume that the
1968 only references to the symbol are via the global offset table.
1969 For such cases we need not do anything here; the relocations will
1970 be handled correctly by relocate_section. */
1971 if (bfd_link_pic (info))
1972 return true;
1973
1974 /* If there are no references to this symbol that do not use the
1975 GOT, we don't need to generate a copy reloc. */
1976 if (!h->non_got_ref)
1977 return true;
1978
1979 /* If -z nocopyreloc was given, we won't generate them either. */
1980 if (info->nocopyreloc)
1981 {
1982 h->non_got_ref = 0;
1983 return true;
1984 }
1985
1986 /* If we don't find any dynamic relocs in read-only sections, then
1987 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1988 if (!_bfd_elf_readonly_dynrelocs (h))
1989 {
1990 h->non_got_ref = 0;
1991 return true;
1992 }
1993
1994 /* We must allocate the symbol in our .dynbss section, which will
1995 become part of the .bss section of the executable. There will be
1996 an entry for this symbol in the .dynsym section. The dynamic
1997 object will contain position independent code, so all references
1998 from the dynamic object to this symbol will go through the global
1999 offset table. The dynamic linker will use the .dynsym entry to
2000 determine the address it must put in the global offset table, so
2001 both the dynamic object and the regular object will refer to the
2002 same memory location for the variable. */
2003
2004 /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker
2005 to copy the initial value out of the dynamic object and into the
2006 runtime process image. We need to remember the offset into the
2007 .rel.bss section we are going to use. */
2008 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2009 {
2010 s = htab->elf.sdynrelro;
2011 srel = htab->elf.sreldynrelro;
2012 }
2013 else
2014 {
2015 s = htab->elf.sdynbss;
2016 srel = htab->elf.srelbss;
2017 }
2018 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2019 {
2020 srel->size += SPARC_ELF_RELA_BYTES (htab);
2021 h->needs_copy = 1;
2022 }
2023
2024 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2025 }
2026
2027 /* Allocate space in .plt, .got and associated reloc sections for
2028 dynamic relocs. */
2029
2030 static bool
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)2031 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2032 {
2033 struct bfd_link_info *info;
2034 struct _bfd_sparc_elf_link_hash_table *htab;
2035 struct _bfd_sparc_elf_link_hash_entry *eh;
2036 struct elf_dyn_relocs *p;
2037 bool resolved_to_zero;
2038
2039 if (h->root.type == bfd_link_hash_indirect)
2040 return true;
2041
2042 info = (struct bfd_link_info *) inf;
2043 htab = _bfd_sparc_elf_hash_table (info);
2044 BFD_ASSERT (htab != NULL);
2045
2046 eh = (struct _bfd_sparc_elf_link_hash_entry *) h;
2047 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
2048
2049 if ((htab->elf.dynamic_sections_created
2050 && h->plt.refcount > 0)
2051 || (h->type == STT_GNU_IFUNC
2052 && h->def_regular
2053 && h->ref_regular))
2054 {
2055 /* Undefined weak syms won't yet be marked as dynamic. */
2056 if (h->root.type == bfd_link_hash_undefweak
2057 && !resolved_to_zero
2058 && h->dynindx == -1
2059 && !h->forced_local)
2060 {
2061 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2062 return false;
2063 }
2064
2065 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)
2066 || (h->type == STT_GNU_IFUNC
2067 && h->def_regular))
2068 {
2069 asection *s = htab->elf.splt;
2070
2071 if (s == NULL)
2072 s = htab->elf.iplt;
2073
2074 /* Allocate room for the header. */
2075 if (s->size == 0)
2076 {
2077 s->size = htab->plt_header_size;
2078
2079 /* Allocate space for the .rela.plt.unloaded relocations. */
2080 if (htab->elf.target_os == is_vxworks
2081 && !bfd_link_pic (info))
2082 htab->srelplt2->size = sizeof (Elf32_External_Rela) * 2;
2083 }
2084
2085 /* The procedure linkage table size is bounded by the magnitude
2086 of the offset we can describe in the entry. */
2087 if (s->size >= (SPARC_ELF_WORD_BYTES(htab) == 8 ?
2088 (((bfd_vma)1 << 31) << 1) : 0x400000))
2089 {
2090 bfd_set_error (bfd_error_bad_value);
2091 return false;
2092 }
2093
2094 if (SPARC_ELF_WORD_BYTES(htab) == 8
2095 && s->size >= PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE)
2096 {
2097 bfd_vma off = s->size - PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE;
2098
2099
2100 off = (off % (160 * PLT64_ENTRY_SIZE)) / PLT64_ENTRY_SIZE;
2101
2102 h->plt.offset = (s->size - (off * 8));
2103 }
2104 else
2105 h->plt.offset = s->size;
2106
2107 /* If this symbol is not defined in a regular file, and we are
2108 not generating a shared library, then set the symbol to this
2109 location in the .plt. This is required to make function
2110 pointers compare as equal between the normal executable and
2111 the shared library. */
2112 if (! bfd_link_pic (info)
2113 && !h->def_regular)
2114 {
2115 h->root.u.def.section = s;
2116 h->root.u.def.value = h->plt.offset;
2117 }
2118
2119 /* Make room for this entry. */
2120 s->size += htab->plt_entry_size;
2121
2122 /* There should be no PLT relocations against resolved undefined
2123 weak symbols in the executable. */
2124 if (!resolved_to_zero)
2125 {
2126 /* We also need to make an entry in the .rela.plt section. */
2127 if (s == htab->elf.splt)
2128 htab->elf.srelplt->size += SPARC_ELF_RELA_BYTES (htab);
2129 else
2130 htab->elf.irelplt->size += SPARC_ELF_RELA_BYTES (htab);
2131 }
2132
2133 if (htab->elf.target_os == is_vxworks)
2134 {
2135 /* Allocate space for the .got.plt entry. */
2136 htab->elf.sgotplt->size += 4;
2137
2138 /* ...and for the .rela.plt.unloaded relocations. */
2139 if (!bfd_link_pic (info))
2140 htab->srelplt2->size += sizeof (Elf32_External_Rela) * 3;
2141 }
2142 }
2143 else
2144 {
2145 h->plt.offset = (bfd_vma) -1;
2146 h->needs_plt = 0;
2147 }
2148 }
2149 else
2150 {
2151 h->plt.offset = (bfd_vma) -1;
2152 h->needs_plt = 0;
2153 }
2154
2155 /* If R_SPARC_TLS_IE_{HI22,LO10} symbol is now local to the binary,
2156 make it a R_SPARC_TLS_LE_{HI22,LO10} requiring no TLS entry. */
2157 if (h->got.refcount > 0
2158 && bfd_link_executable (info)
2159 && h->dynindx == -1
2160 && _bfd_sparc_elf_hash_entry(h)->tls_type == GOT_TLS_IE)
2161 h->got.offset = (bfd_vma) -1;
2162 else if (h->got.refcount > 0)
2163 {
2164 asection *s;
2165 bool dyn;
2166 int tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type;
2167
2168 /* Undefined weak syms won't yet be marked as dynamic. */
2169 if (h->root.type == bfd_link_hash_undefweak
2170 && !resolved_to_zero
2171 && h->dynindx == -1
2172 && !h->forced_local)
2173 {
2174 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2175 return false;
2176 }
2177
2178 s = htab->elf.sgot;
2179 h->got.offset = s->size;
2180 s->size += SPARC_ELF_WORD_BYTES (htab);
2181 /* R_SPARC_TLS_GD_HI{22,LO10} needs 2 consecutive GOT slots. */
2182 if (tls_type == GOT_TLS_GD)
2183 s->size += SPARC_ELF_WORD_BYTES (htab);
2184 dyn = htab->elf.dynamic_sections_created;
2185 /* R_SPARC_TLS_IE_{HI22,LO10} needs one dynamic relocation,
2186 R_SPARC_TLS_GD_{HI22,LO10} needs one if local and two if global. */
2187 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
2188 || tls_type == GOT_TLS_IE
2189 || h->type == STT_GNU_IFUNC)
2190 htab->elf.srelgot->size += SPARC_ELF_RELA_BYTES (htab);
2191 else if (tls_type == GOT_TLS_GD)
2192 htab->elf.srelgot->size += 2 * SPARC_ELF_RELA_BYTES (htab);
2193 else if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
2194 /* Even if the symbol isn't dynamic, we may generate a
2195 reloc for the dynamic linker in PIC mode. */
2196 || (h->dynindx == -1
2197 && !h->forced_local
2198 && h->root.type != bfd_link_hash_undefweak
2199 && bfd_link_pic (info)))
2200 /* No dynamic relocations are needed against resolved
2201 undefined weak symbols in an executable. */
2202 && !(h->root.type == bfd_link_hash_undefweak
2203 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2204 || resolved_to_zero)))
2205 htab->elf.srelgot->size += SPARC_ELF_RELA_BYTES (htab);
2206 }
2207 else
2208 h->got.offset = (bfd_vma) -1;
2209
2210 if (h->dyn_relocs == NULL)
2211 return true;
2212
2213 /* In the shared -Bsymbolic case, discard space allocated for
2214 dynamic pc-relative relocs against symbols which turn out to be
2215 defined in regular objects. For the normal shared case, discard
2216 space for pc-relative relocs that have become local due to symbol
2217 visibility changes. */
2218
2219 if (bfd_link_pic (info))
2220 {
2221 if (SYMBOL_CALLS_LOCAL (info, h))
2222 {
2223 struct elf_dyn_relocs **pp;
2224
2225 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
2226 {
2227 p->count -= p->pc_count;
2228 p->pc_count = 0;
2229 if (p->count == 0)
2230 *pp = p->next;
2231 else
2232 pp = &p->next;
2233 }
2234 }
2235
2236 if (htab->elf.target_os == is_vxworks)
2237 {
2238 struct elf_dyn_relocs **pp;
2239
2240 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
2241 {
2242 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2243 *pp = p->next;
2244 else
2245 pp = &p->next;
2246 }
2247 }
2248
2249 /* Also discard relocs on undefined weak syms with non-default
2250 visibility or in PIE. */
2251 if (h->dyn_relocs != NULL
2252 && h->root.type == bfd_link_hash_undefweak)
2253 {
2254 /* An undefined weak symbol is never
2255 bound locally in a shared library. */
2256
2257 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2258 || resolved_to_zero)
2259 {
2260 if (h->non_got_ref)
2261 {
2262 /* Keep dynamic non-GOT/non-PLT relocation so that we
2263 can branch to 0 without PLT. */
2264 struct elf_dyn_relocs **pp;
2265
2266 for (pp = &h->dyn_relocs; (p = *pp) != NULL;)
2267 if (p->pc_count == 0)
2268 *pp = p->next;
2269 else
2270 {
2271 /* Remove other relocations. */
2272 p->count = p->pc_count;
2273 pp = &p->next;
2274 }
2275
2276 if (h->dyn_relocs != NULL)
2277 {
2278 /* Make sure undefined weak symbols are output
2279 as dynamic symbols in PIEs for dynamic non-GOT
2280 non-PLT reloations. */
2281 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2282 return false;
2283 }
2284 }
2285 else
2286 h->dyn_relocs = NULL;
2287 }
2288
2289 /* Make sure undefined weak symbols are output as a dynamic
2290 symbol in PIEs. */
2291 else if (h->dynindx == -1
2292 && !h->forced_local)
2293 {
2294 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2295 return false;
2296 }
2297 }
2298 }
2299 else
2300 {
2301 /* For the non-shared case, discard space for relocs against
2302 symbols which turn out to need copy relocs or are not
2303 dynamic. */
2304
2305 if ((!h->non_got_ref
2306 || (h->root.type == bfd_link_hash_undefweak
2307 && !resolved_to_zero))
2308 && ((h->def_dynamic
2309 && !h->def_regular)
2310 || (htab->elf.dynamic_sections_created
2311 && (h->root.type == bfd_link_hash_undefweak
2312 || h->root.type == bfd_link_hash_undefined))))
2313 {
2314 /* Undefined weak syms won't yet be marked as dynamic. */
2315 if (h->root.type == bfd_link_hash_undefweak
2316 && !resolved_to_zero
2317 && h->dynindx == -1
2318 && !h->forced_local)
2319 {
2320 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2321 return false;
2322 }
2323
2324 /* If that succeeded, we know we'll be keeping all the
2325 relocs. */
2326 if (h->dynindx != -1)
2327 goto keep;
2328 }
2329
2330 h->dyn_relocs = NULL;
2331
2332 keep: ;
2333 }
2334
2335 /* Finally, allocate space. */
2336 for (p = h->dyn_relocs; p != NULL; p = p->next)
2337 {
2338 asection *sreloc = elf_section_data (p->sec)->sreloc;
2339 sreloc->size += p->count * SPARC_ELF_RELA_BYTES (htab);
2340 }
2341
2342 return true;
2343 }
2344
2345 /* Allocate space in .plt, .got and associated reloc sections for
2346 local dynamic relocs. */
2347
2348 static int
allocate_local_dynrelocs(void ** slot,void * inf)2349 allocate_local_dynrelocs (void **slot, void *inf)
2350 {
2351 struct elf_link_hash_entry *h
2352 = (struct elf_link_hash_entry *) *slot;
2353
2354 if (h->type != STT_GNU_IFUNC
2355 || !h->def_regular
2356 || !h->ref_regular
2357 || !h->forced_local
2358 || h->root.type != bfd_link_hash_defined)
2359 abort ();
2360
2361 return allocate_dynrelocs (h, inf);
2362 }
2363
2364 /* Return true if the dynamic symbol for a given section should be
2365 omitted when creating a shared library. */
2366
2367 bool
_bfd_sparc_elf_omit_section_dynsym(bfd * output_bfd,struct bfd_link_info * info,asection * p)2368 _bfd_sparc_elf_omit_section_dynsym (bfd *output_bfd,
2369 struct bfd_link_info *info,
2370 asection *p)
2371 {
2372 /* We keep the .got section symbol so that explicit relocations
2373 against the _GLOBAL_OFFSET_TABLE_ symbol emitted in PIC mode
2374 can be turned into relocations against the .got symbol. */
2375 if (strcmp (p->name, ".got") == 0)
2376 return false;
2377
2378 return _bfd_elf_omit_section_dynsym_default (output_bfd, info, p);
2379 }
2380
2381 /* Set the sizes of the dynamic sections. */
2382
2383 bool
_bfd_sparc_elf_size_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)2384 _bfd_sparc_elf_size_dynamic_sections (bfd *output_bfd,
2385 struct bfd_link_info *info)
2386 {
2387 struct _bfd_sparc_elf_link_hash_table *htab;
2388 bfd *dynobj;
2389 asection *s;
2390 bfd *ibfd;
2391
2392 htab = _bfd_sparc_elf_hash_table (info);
2393 BFD_ASSERT (htab != NULL);
2394 dynobj = htab->elf.dynobj;
2395 BFD_ASSERT (dynobj != NULL);
2396
2397 if (elf_hash_table (info)->dynamic_sections_created)
2398 {
2399 /* Set the contents of the .interp section to the interpreter. */
2400 if (bfd_link_executable (info) && !info->nointerp)
2401 {
2402 s = bfd_get_linker_section (dynobj, ".interp");
2403 BFD_ASSERT (s != NULL);
2404 s->size = htab->dynamic_interpreter_size;
2405 s->contents = (unsigned char *) htab->dynamic_interpreter;
2406 htab->interp = s;
2407 }
2408 }
2409
2410 /* Set up .got offsets for local syms, and space for local dynamic
2411 relocs. */
2412 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2413 {
2414 bfd_signed_vma *local_got;
2415 bfd_signed_vma *end_local_got;
2416 char *local_tls_type;
2417 bfd_size_type locsymcount;
2418 Elf_Internal_Shdr *symtab_hdr;
2419 asection *srel;
2420
2421 if (! is_sparc_elf (ibfd))
2422 continue;
2423
2424 for (s = ibfd->sections; s != NULL; s = s->next)
2425 {
2426 struct elf_dyn_relocs *p;
2427
2428 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2429 {
2430 if (!bfd_is_abs_section (p->sec)
2431 && bfd_is_abs_section (p->sec->output_section))
2432 {
2433 /* Input section has been discarded, either because
2434 it is a copy of a linkonce section or due to
2435 linker script /DISCARD/, so we'll be discarding
2436 the relocs too. */
2437 }
2438 else if (htab->elf.target_os == is_vxworks
2439 && strcmp (p->sec->output_section->name,
2440 ".tls_vars") == 0)
2441 {
2442 /* Relocations in vxworks .tls_vars sections are
2443 handled specially by the loader. */
2444 }
2445 else if (p->count != 0)
2446 {
2447 srel = elf_section_data (p->sec)->sreloc;
2448 if (!htab->elf.dynamic_sections_created)
2449 srel = htab->elf.irelplt;
2450 srel->size += p->count * SPARC_ELF_RELA_BYTES (htab);
2451 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2452 {
2453 info->flags |= DF_TEXTREL;
2454 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
2455 p->sec->owner, p->sec);
2456 }
2457 }
2458 }
2459 }
2460
2461 local_got = elf_local_got_refcounts (ibfd);
2462 if (!local_got)
2463 continue;
2464
2465 symtab_hdr = &elf_symtab_hdr (ibfd);
2466 locsymcount = symtab_hdr->sh_info;
2467 end_local_got = local_got + locsymcount;
2468 local_tls_type = _bfd_sparc_elf_local_got_tls_type (ibfd);
2469 s = htab->elf.sgot;
2470 srel = htab->elf.srelgot;
2471 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2472 {
2473 if (*local_got > 0)
2474 {
2475 *local_got = s->size;
2476 s->size += SPARC_ELF_WORD_BYTES (htab);
2477 if (*local_tls_type == GOT_TLS_GD)
2478 s->size += SPARC_ELF_WORD_BYTES (htab);
2479 if (bfd_link_pic (info)
2480 || *local_tls_type == GOT_TLS_GD
2481 || *local_tls_type == GOT_TLS_IE)
2482 srel->size += SPARC_ELF_RELA_BYTES (htab);
2483 }
2484 else
2485 *local_got = (bfd_vma) -1;
2486 }
2487 }
2488
2489 if (htab->tls_ldm_got.refcount > 0)
2490 {
2491 /* Allocate 2 got entries and 1 dynamic reloc for
2492 R_SPARC_TLS_LDM_{HI22,LO10} relocs. */
2493 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2494 htab->elf.sgot->size += (2 * SPARC_ELF_WORD_BYTES (htab));
2495 htab->elf.srelgot->size += SPARC_ELF_RELA_BYTES (htab);
2496 }
2497 else
2498 htab->tls_ldm_got.offset = -1;
2499
2500 /* Allocate global sym .plt and .got entries, and space for global
2501 sym dynamic relocs. */
2502 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2503
2504 /* Allocate .plt and .got entries, and space for local symbols. */
2505 htab_traverse (htab->loc_hash_table, allocate_local_dynrelocs, info);
2506
2507 if (! ABI_64_P (output_bfd)
2508 && htab->elf.target_os != is_vxworks
2509 && elf_hash_table (info)->dynamic_sections_created)
2510 {
2511 /* Make space for the trailing nop in .plt. */
2512 if (htab->elf.splt->size > 0)
2513 htab->elf.splt->size += 1 * SPARC_INSN_BYTES;
2514
2515 /* If the .got section is more than 0x1000 bytes, we add
2516 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13
2517 bit relocations have a greater chance of working.
2518
2519 FIXME: Make this optimization work for 64-bit too. */
2520 if (htab->elf.sgot->size >= 0x1000
2521 && elf_hash_table (info)->hgot->root.u.def.value == 0)
2522 elf_hash_table (info)->hgot->root.u.def.value = 0x1000;
2523 }
2524
2525 /* The check_relocs and adjust_dynamic_symbol entry points have
2526 determined the sizes of the various dynamic sections. Allocate
2527 memory for them. */
2528 for (s = dynobj->sections; s != NULL; s = s->next)
2529 {
2530 if ((s->flags & SEC_LINKER_CREATED) == 0)
2531 continue;
2532
2533 if (s == htab->elf.splt
2534 || s == htab->elf.sgot
2535 || s == htab->elf.sdynbss
2536 || s == htab->elf.sdynrelro
2537 || s == htab->elf.iplt
2538 || s == htab->elf.sgotplt)
2539 {
2540 /* Strip this section if we don't need it; see the
2541 comment below. */
2542 }
2543 else if (startswith (s->name, ".rela"))
2544 {
2545 if (s->size != 0)
2546 {
2547 /* We use the reloc_count field as a counter if we need
2548 to copy relocs into the output file. */
2549 s->reloc_count = 0;
2550 }
2551 }
2552 else
2553 {
2554 /* It's not one of our sections. */
2555 continue;
2556 }
2557
2558 if (s->size == 0)
2559 {
2560 /* If we don't need this section, strip it from the
2561 output file. This is mostly to handle .rela.bss and
2562 .rela.plt. We must create both sections in
2563 create_dynamic_sections, because they must be created
2564 before the linker maps input sections to output
2565 sections. The linker does that before
2566 adjust_dynamic_symbol is called, and it is that
2567 function which decides whether anything needs to go
2568 into these sections. */
2569 s->flags |= SEC_EXCLUDE;
2570 continue;
2571 }
2572
2573 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2574 continue;
2575
2576 /* Allocate memory for the section contents. Zero the memory
2577 for the benefit of .rela.plt, which has 4 unused entries
2578 at the beginning, and we don't want garbage. */
2579 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2580 if (s->contents == NULL)
2581 return false;
2582 }
2583
2584 if (elf_hash_table (info)->dynamic_sections_created)
2585 {
2586 /* Add some entries to the .dynamic section. We fill in the
2587 values later, in _bfd_sparc_elf_finish_dynamic_sections, but we
2588 must add the entries now so that we get the correct size for
2589 the .dynamic section. The DT_DEBUG entry is filled in by the
2590 dynamic linker and used by the debugger. */
2591 #define add_dynamic_entry(TAG, VAL) \
2592 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2593
2594 if (!_bfd_elf_maybe_vxworks_add_dynamic_tags (output_bfd, info,
2595 true))
2596 return false;
2597
2598 if (ABI_64_P (output_bfd))
2599 {
2600 int reg;
2601 struct _bfd_sparc_elf_app_reg * app_regs;
2602 struct elf_strtab_hash *dynstr;
2603 struct elf_link_hash_table *eht = elf_hash_table (info);
2604
2605 /* Add dynamic STT_REGISTER symbols and corresponding DT_SPARC_REGISTER
2606 entries if needed. */
2607 app_regs = _bfd_sparc_elf_hash_table (info)->app_regs;
2608 dynstr = eht->dynstr;
2609
2610 for (reg = 0; reg < 4; reg++)
2611 if (app_regs [reg].name != NULL)
2612 {
2613 struct elf_link_local_dynamic_entry *entry, *e;
2614
2615 if (!add_dynamic_entry (DT_SPARC_REGISTER, 0))
2616 return false;
2617
2618 entry = (struct elf_link_local_dynamic_entry *)
2619 bfd_hash_allocate (&info->hash->table, sizeof (*entry));
2620 if (entry == NULL)
2621 return false;
2622
2623 /* We cheat here a little bit: the symbol will not be local, so we
2624 put it at the end of the dynlocal linked list. We will fix it
2625 later on, as we have to fix other fields anyway. */
2626 entry->isym.st_value = reg < 2 ? reg + 2 : reg + 4;
2627 entry->isym.st_size = 0;
2628 if (*app_regs [reg].name != '\0')
2629 entry->isym.st_name
2630 = _bfd_elf_strtab_add (dynstr, app_regs[reg].name, false);
2631 else
2632 entry->isym.st_name = 0;
2633 entry->isym.st_other = 0;
2634 entry->isym.st_info = ELF_ST_INFO (app_regs [reg].bind,
2635 STT_REGISTER);
2636 entry->isym.st_shndx = app_regs [reg].shndx;
2637 entry->isym.st_target_internal = 0;
2638 entry->next = NULL;
2639 entry->input_bfd = output_bfd;
2640 entry->input_indx = -1;
2641
2642 if (eht->dynlocal == NULL)
2643 eht->dynlocal = entry;
2644 else
2645 {
2646 for (e = eht->dynlocal; e->next; e = e->next)
2647 ;
2648 e->next = entry;
2649 }
2650 eht->dynsymcount++;
2651 }
2652 }
2653 }
2654 #undef add_dynamic_entry
2655
2656 return true;
2657 }
2658
2659 bool
_bfd_sparc_elf_new_section_hook(bfd * abfd,asection * sec)2660 _bfd_sparc_elf_new_section_hook (bfd *abfd, asection *sec)
2661 {
2662 if (!sec->used_by_bfd)
2663 {
2664 struct _bfd_sparc_elf_section_data *sdata;
2665 size_t amt = sizeof (*sdata);
2666
2667 sdata = bfd_zalloc (abfd, amt);
2668 if (sdata == NULL)
2669 return false;
2670 sec->used_by_bfd = sdata;
2671 }
2672
2673 return _bfd_elf_new_section_hook (abfd, sec);
2674 }
2675
2676 bool
_bfd_sparc_elf_relax_section(bfd * abfd ATTRIBUTE_UNUSED,struct bfd_section * section,struct bfd_link_info * link_info ATTRIBUTE_UNUSED,bool * again)2677 _bfd_sparc_elf_relax_section (bfd *abfd ATTRIBUTE_UNUSED,
2678 struct bfd_section *section,
2679 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2680 bool *again)
2681 {
2682 if (bfd_link_relocatable (link_info))
2683 (*link_info->callbacks->einfo)
2684 (_("%P%F: --relax and -r may not be used together\n"));
2685
2686 *again = false;
2687 sec_do_relax (section) = 1;
2688 return true;
2689 }
2690
2691 /* Return the base VMA address which should be subtracted from real addresses
2692 when resolving @dtpoff relocation.
2693 This is PT_TLS segment p_vaddr. */
2694
2695 static bfd_vma
dtpoff_base(struct bfd_link_info * info)2696 dtpoff_base (struct bfd_link_info *info)
2697 {
2698 /* If tls_sec is NULL, we should have signalled an error already. */
2699 if (elf_hash_table (info)->tls_sec == NULL)
2700 return 0;
2701 return elf_hash_table (info)->tls_sec->vma;
2702 }
2703
2704 /* Return the relocation value for @tpoff relocation
2705 if STT_TLS virtual address is ADDRESS. */
2706
2707 static bfd_vma
tpoff(struct bfd_link_info * info,bfd_vma address)2708 tpoff (struct bfd_link_info *info, bfd_vma address)
2709 {
2710 struct elf_link_hash_table *htab = elf_hash_table (info);
2711 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2712 bfd_vma static_tls_size;
2713
2714 /* If tls_sec is NULL, we should have signalled an error already. */
2715 if (htab->tls_sec == NULL)
2716 return 0;
2717
2718 /* Consider special static TLS alignment requirements. */
2719 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2720 return address - static_tls_size - htab->tls_sec->vma;
2721 }
2722
2723 /* Return the relocation value for a %gdop relocation. */
2724
2725 static bfd_vma
gdopoff(struct bfd_link_info * info,bfd_vma address)2726 gdopoff (struct bfd_link_info *info, bfd_vma address)
2727 {
2728 struct elf_link_hash_table *htab = elf_hash_table (info);
2729 bfd_vma got_base;
2730
2731 got_base = (htab->hgot->root.u.def.value
2732 + htab->hgot->root.u.def.section->output_offset
2733 + htab->hgot->root.u.def.section->output_section->vma);
2734
2735 return address - got_base;
2736 }
2737
2738 /* Return whether H is local and its ADDRESS is within 4G of
2739 _GLOBAL_OFFSET_TABLE_ and thus the offset may be calculated by a
2740 sethi, xor sequence. */
2741
2742 static bool
gdop_relative_offset_ok(struct bfd_link_info * info,struct elf_link_hash_entry * h,bfd_vma address ATTRIBUTE_UNUSED)2743 gdop_relative_offset_ok (struct bfd_link_info *info,
2744 struct elf_link_hash_entry *h,
2745 bfd_vma address ATTRIBUTE_UNUSED)
2746 {
2747 if (!SYMBOL_REFERENCES_LOCAL (info, h))
2748 return false;
2749 /* If H is undefined, ADDRESS will be zero. We can't allow a
2750 relative offset to "zero" when producing PIEs or shared libs.
2751 Note that to get here with an undefined symbol it must also be
2752 hidden or internal visibility. */
2753 if (bfd_link_pic (info)
2754 && h != NULL
2755 && (h->root.type == bfd_link_hash_undefweak
2756 || h->root.type == bfd_link_hash_undefined))
2757 return false;
2758 #ifdef BFD64
2759 return gdopoff (info, address) + ((bfd_vma) 1 << 32) < (bfd_vma) 2 << 32;
2760 #else
2761 return true;
2762 #endif
2763 }
2764
2765 /* Relocate a SPARC ELF section. */
2766
2767 int
_bfd_sparc_elf_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)2768 _bfd_sparc_elf_relocate_section (bfd *output_bfd,
2769 struct bfd_link_info *info,
2770 bfd *input_bfd,
2771 asection *input_section,
2772 bfd_byte *contents,
2773 Elf_Internal_Rela *relocs,
2774 Elf_Internal_Sym *local_syms,
2775 asection **local_sections)
2776 {
2777 struct _bfd_sparc_elf_link_hash_table *htab;
2778 Elf_Internal_Shdr *symtab_hdr;
2779 struct elf_link_hash_entry **sym_hashes;
2780 bfd_vma *local_got_offsets;
2781 bfd_vma got_base;
2782 asection *sreloc;
2783 Elf_Internal_Rela *rel;
2784 Elf_Internal_Rela *relend;
2785 int num_relocs;
2786 bool is_vxworks_tls;
2787
2788 htab = _bfd_sparc_elf_hash_table (info);
2789 BFD_ASSERT (htab != NULL);
2790 symtab_hdr = &elf_symtab_hdr (input_bfd);
2791 sym_hashes = elf_sym_hashes (input_bfd);
2792 local_got_offsets = elf_local_got_offsets (input_bfd);
2793
2794 if (elf_hash_table (info)->hgot == NULL)
2795 got_base = 0;
2796 else
2797 got_base = elf_hash_table (info)->hgot->root.u.def.value;
2798
2799 sreloc = elf_section_data (input_section)->sreloc;
2800 /* We have to handle relocations in vxworks .tls_vars sections
2801 specially, because the dynamic loader is 'weird'. */
2802 is_vxworks_tls = (htab->elf.target_os == is_vxworks
2803 && bfd_link_pic (info)
2804 && !strcmp (input_section->output_section->name,
2805 ".tls_vars"));
2806
2807 rel = relocs;
2808 if (ABI_64_P (output_bfd))
2809 num_relocs = NUM_SHDR_ENTRIES (_bfd_elf_single_rel_hdr (input_section));
2810 else
2811 num_relocs = input_section->reloc_count;
2812 relend = relocs + num_relocs;
2813 for (; rel < relend; rel++)
2814 {
2815 int r_type, tls_type;
2816 reloc_howto_type *howto;
2817 unsigned long r_symndx;
2818 struct elf_link_hash_entry *h;
2819 struct _bfd_sparc_elf_link_hash_entry *eh;
2820 Elf_Internal_Sym *sym;
2821 asection *sec;
2822 bfd_vma relocation, off;
2823 bfd_reloc_status_type r;
2824 bool is_plt = false;
2825 bool unresolved_reloc;
2826 bool resolved_to_zero;
2827 bool relative_reloc;
2828
2829 r_type = SPARC_ELF_R_TYPE (rel->r_info);
2830 if (r_type == R_SPARC_GNU_VTINHERIT
2831 || r_type == R_SPARC_GNU_VTENTRY)
2832 continue;
2833
2834 if (r_type < 0 || r_type >= (int) R_SPARC_max_std)
2835 {
2836 bfd_set_error (bfd_error_bad_value);
2837 return false;
2838 }
2839
2840 howto = _bfd_sparc_elf_howto_table + r_type;
2841 r_symndx = SPARC_ELF_R_SYMNDX (htab, rel->r_info);
2842 h = NULL;
2843 sym = NULL;
2844 sec = NULL;
2845 unresolved_reloc = false;
2846 if (r_symndx < symtab_hdr->sh_info)
2847 {
2848 sym = local_syms + r_symndx;
2849 sec = local_sections[r_symndx];
2850 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2851
2852 if (!bfd_link_relocatable (info)
2853 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2854 {
2855 /* Relocate against local STT_GNU_IFUNC symbol. */
2856 h = elf_sparc_get_local_sym_hash (htab, input_bfd,
2857 rel, false);
2858 if (h == NULL)
2859 abort ();
2860
2861 /* Set STT_GNU_IFUNC symbol value. */
2862 h->root.u.def.value = sym->st_value;
2863 h->root.u.def.section = sec;
2864 }
2865 }
2866 else
2867 {
2868 bool warned, ignored;
2869
2870 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2871 r_symndx, symtab_hdr, sym_hashes,
2872 h, sec, relocation,
2873 unresolved_reloc, warned, ignored);
2874 if (warned)
2875 {
2876 /* To avoid generating warning messages about truncated
2877 relocations, set the relocation's address to be the same as
2878 the start of this section. */
2879 if (input_section->output_section != NULL)
2880 relocation = input_section->output_section->vma;
2881 else
2882 relocation = 0;
2883 }
2884 }
2885
2886 if (sec != NULL && discarded_section (sec))
2887 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2888 rel, 1, relend, howto, 0, contents);
2889
2890 if (bfd_link_relocatable (info))
2891 continue;
2892
2893 if (h != NULL
2894 && h->type == STT_GNU_IFUNC
2895 && h->def_regular)
2896 {
2897 asection *plt_sec;
2898 const char *name;
2899
2900 if ((input_section->flags & SEC_ALLOC) == 0
2901 || h->plt.offset == (bfd_vma) -1)
2902 {
2903 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2904 STT_GNU_IFUNC symbol as STT_FUNC. */
2905 if (elf_section_type (input_section) == SHT_NOTE)
2906 goto skip_ifunc;
2907
2908 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2909 sections because such sections are not SEC_ALLOC and
2910 thus ld.so will not process them. */
2911 if ((input_section->flags & SEC_ALLOC) == 0
2912 && (input_section->flags & SEC_DEBUGGING) != 0)
2913 continue;
2914
2915 _bfd_error_handler
2916 /* xgettext:c-format */
2917 (_("%pB(%pA+%#" PRIx64 "): "
2918 "unresolvable %s relocation against symbol `%s'"),
2919 input_bfd,
2920 input_section,
2921 (uint64_t) rel->r_offset,
2922 howto->name,
2923 h->root.root.string);
2924 bfd_set_error (bfd_error_bad_value);
2925 return false;
2926 }
2927
2928 plt_sec = htab->elf.splt;
2929 if (! plt_sec)
2930 plt_sec =htab->elf.iplt;
2931
2932 switch (r_type)
2933 {
2934 case R_SPARC_GOTDATA_OP:
2935 continue;
2936
2937 case R_SPARC_GOTDATA_OP_HIX22:
2938 case R_SPARC_GOTDATA_OP_LOX10:
2939 r_type = (r_type == R_SPARC_GOTDATA_OP_HIX22
2940 ? R_SPARC_GOT22
2941 : R_SPARC_GOT10);
2942 howto = _bfd_sparc_elf_howto_table + r_type;
2943 /* Fall through. */
2944
2945 case R_SPARC_GOT10:
2946 case R_SPARC_GOT13:
2947 case R_SPARC_GOT22:
2948 if (htab->elf.sgot == NULL)
2949 abort ();
2950 off = h->got.offset;
2951 if (off == (bfd_vma) -1)
2952 abort();
2953 relocation = htab->elf.sgot->output_offset + off - got_base;
2954 goto do_relocation;
2955
2956 case R_SPARC_WPLT30:
2957 case R_SPARC_WDISP30:
2958 relocation = (plt_sec->output_section->vma
2959 + plt_sec->output_offset + h->plt.offset);
2960 goto do_relocation;
2961
2962 case R_SPARC_32:
2963 case R_SPARC_64:
2964 if (bfd_link_pic (info) && h->non_got_ref)
2965 {
2966 Elf_Internal_Rela outrel;
2967 bfd_vma offset;
2968
2969 offset = _bfd_elf_section_offset (output_bfd, info,
2970 input_section,
2971 rel->r_offset);
2972 if (offset == (bfd_vma) -1
2973 || offset == (bfd_vma) -2)
2974 abort();
2975
2976 outrel.r_offset = (input_section->output_section->vma
2977 + input_section->output_offset
2978 + offset);
2979
2980 if (h->dynindx == -1
2981 || h->forced_local
2982 || bfd_link_executable (info))
2983 {
2984 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL,
2985 0, R_SPARC_IRELATIVE);
2986 outrel.r_addend = relocation + rel->r_addend;
2987 }
2988 else
2989 {
2990 if (h->dynindx == -1)
2991 abort();
2992 outrel.r_info = SPARC_ELF_R_INFO (htab, rel, h->dynindx, r_type);
2993 outrel.r_addend = rel->r_addend;
2994 }
2995
2996 sparc_elf_append_rela (output_bfd, sreloc, &outrel);
2997 continue;
2998 }
2999
3000 relocation = (plt_sec->output_section->vma
3001 + plt_sec->output_offset + h->plt.offset);
3002 goto do_relocation;
3003
3004 case R_SPARC_HI22:
3005 case R_SPARC_LO10:
3006 /* We should only see such relocs in static links. */
3007 if (bfd_link_pic (info))
3008 abort();
3009 relocation = (plt_sec->output_section->vma
3010 + plt_sec->output_offset + h->plt.offset);
3011 goto do_relocation;
3012
3013 default:
3014 if (h->root.root.string)
3015 name = h->root.root.string;
3016 else
3017 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3018 NULL);
3019 _bfd_error_handler
3020 /* xgettext:c-format */
3021 (_("%pB: relocation %s against STT_GNU_IFUNC "
3022 "symbol `%s' isn't handled by %s"), input_bfd,
3023 _bfd_sparc_elf_howto_table[r_type].name,
3024 name, __FUNCTION__);
3025 bfd_set_error (bfd_error_bad_value);
3026 return false;
3027 }
3028 }
3029
3030 skip_ifunc:
3031 eh = (struct _bfd_sparc_elf_link_hash_entry *) h;
3032 resolved_to_zero = eh && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
3033
3034 switch (r_type)
3035 {
3036 case R_SPARC_GOTDATA_OP_HIX22:
3037 case R_SPARC_GOTDATA_OP_LOX10:
3038 if (gdop_relative_offset_ok (info, h, relocation))
3039 {
3040 r_type = (r_type == R_SPARC_GOTDATA_OP_HIX22
3041 ? R_SPARC_GOTDATA_HIX22
3042 : R_SPARC_GOTDATA_LOX10);
3043 howto = _bfd_sparc_elf_howto_table + r_type;
3044 }
3045 break;
3046
3047 case R_SPARC_GOTDATA_OP:
3048 if (gdop_relative_offset_ok (info, h, relocation))
3049 {
3050 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3051
3052 /* {ld,ldx} [%rs1 + %rs2], %rd --> add %rs1, %rs2, %rd */
3053 relocation = 0x80000000 | (insn & 0x3e07c01f);
3054 bfd_put_32 (output_bfd, relocation, contents + rel->r_offset);
3055
3056 /* If the symbol is global but not dynamic, an .rela.* slot has
3057 been allocated for it in the GOT so output R_SPARC_NONE here,
3058 if it isn't also subject to another, old-style GOT relocation.
3059 See also the handling of these GOT relocations just below. */
3060 if (h != NULL
3061 && h->dynindx == -1
3062 && !h->forced_local
3063 && h->root.type != bfd_link_hash_undefweak
3064 && !eh->has_old_style_got_reloc
3065 && (h->got.offset & 1) == 0
3066 && bfd_link_pic (info))
3067 {
3068 asection *s = htab->elf.srelgot;
3069 Elf_Internal_Rela outrel;
3070
3071 BFD_ASSERT (s != NULL);
3072
3073 memset (&outrel, 0, sizeof outrel);
3074 sparc_elf_append_rela (output_bfd, s, &outrel);
3075 h->got.offset |= 1;
3076 }
3077 }
3078 continue;
3079 }
3080
3081 switch (r_type)
3082 {
3083 case R_SPARC_GOTDATA_HIX22:
3084 case R_SPARC_GOTDATA_LOX10:
3085 relocation = gdopoff (info, relocation);
3086 break;
3087
3088 case R_SPARC_GOTDATA_OP_HIX22:
3089 case R_SPARC_GOTDATA_OP_LOX10:
3090 case R_SPARC_GOT10:
3091 case R_SPARC_GOT13:
3092 case R_SPARC_GOT22:
3093 /* Relocation is to the entry for this symbol in the global
3094 offset table. */
3095 if (htab->elf.sgot == NULL)
3096 abort ();
3097
3098 relative_reloc = false;
3099 if (h != NULL)
3100 {
3101 bool dyn;
3102
3103 off = h->got.offset;
3104 BFD_ASSERT (off != (bfd_vma) -1);
3105 dyn = elf_hash_table (info)->dynamic_sections_created;
3106
3107 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3108 bfd_link_pic (info),
3109 h)
3110 || (bfd_link_pic (info)
3111 && SYMBOL_REFERENCES_LOCAL (info, h)))
3112 {
3113 /* This is actually a static link, or it is a
3114 -Bsymbolic link and the symbol is defined
3115 locally, or the symbol was forced to be local
3116 because of a version file. We must initialize
3117 this entry in the global offset table. Since the
3118 offset must always be a multiple of 8 for 64-bit
3119 and 4 for 32-bit, we use the least significant bit
3120 to record whether we have initialized it already.
3121
3122 When doing a dynamic link, we create a .rela.got
3123 relocation entry to initialize the value. This
3124 is done in the finish_dynamic_symbol routine. */
3125 if ((off & 1) != 0)
3126 off &= ~1;
3127 else
3128 {
3129 /* If this symbol isn't dynamic in PIC mode, treat it
3130 like a local symbol in PIC mode below. */
3131 if (h->dynindx == -1
3132 && !h->forced_local
3133 && h->root.type != bfd_link_hash_undefweak
3134 && bfd_link_pic (info))
3135 relative_reloc = true;
3136 else
3137 SPARC_ELF_PUT_WORD (htab, output_bfd, relocation,
3138 htab->elf.sgot->contents + off);
3139 h->got.offset |= 1;
3140 }
3141 }
3142 else
3143 unresolved_reloc = false;
3144 }
3145 else
3146 {
3147 BFD_ASSERT (local_got_offsets != NULL
3148 && local_got_offsets[r_symndx] != (bfd_vma) -1);
3149
3150 off = local_got_offsets[r_symndx];
3151
3152 /* The offset must always be a multiple of 8 on 64-bit and
3153 4 on 32-bit. We use the least significant bit to record
3154 whether we have already processed this entry. */
3155 if ((off & 1) != 0)
3156 off &= ~1;
3157 else
3158 {
3159 /* For a local symbol in PIC mode, we need to generate a
3160 R_SPARC_RELATIVE reloc for the dynamic linker. */
3161 if (bfd_link_pic (info))
3162 relative_reloc = true;
3163 else
3164 SPARC_ELF_PUT_WORD (htab, output_bfd, relocation,
3165 htab->elf.sgot->contents + off);
3166 local_got_offsets[r_symndx] |= 1;
3167 }
3168 }
3169
3170 if (relative_reloc)
3171 {
3172 asection *s = htab->elf.srelgot;
3173 Elf_Internal_Rela outrel;
3174
3175 BFD_ASSERT (s != NULL);
3176
3177 outrel.r_offset = (htab->elf.sgot->output_section->vma
3178 + htab->elf.sgot->output_offset
3179 + off);
3180 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL,
3181 0, R_SPARC_RELATIVE);
3182 outrel.r_addend = relocation;
3183 sparc_elf_append_rela (output_bfd, s, &outrel);
3184 /* Versions of glibc ld.so at least up to 2.26 wrongly
3185 add the section contents to the value calculated for
3186 a RELATIVE reloc. Zero the contents to work around
3187 this bug. */
3188 relocation = 0;
3189 SPARC_ELF_PUT_WORD (htab, output_bfd, relocation,
3190 htab->elf.sgot->contents + off);
3191 }
3192
3193 relocation = htab->elf.sgot->output_offset + off - got_base;
3194 break;
3195
3196 case R_SPARC_PLT32:
3197 case R_SPARC_PLT64:
3198 if (h == NULL || h->plt.offset == (bfd_vma) -1)
3199 {
3200 r_type = (r_type == R_SPARC_PLT32) ? R_SPARC_32 : R_SPARC_64;
3201 goto r_sparc_plt32;
3202 }
3203 /* Fall through. */
3204
3205 case R_SPARC_WPLT30:
3206 case R_SPARC_HIPLT22:
3207 case R_SPARC_LOPLT10:
3208 case R_SPARC_PCPLT32:
3209 case R_SPARC_PCPLT22:
3210 case R_SPARC_PCPLT10:
3211 r_sparc_wplt30:
3212 /* Relocation is to the entry for this symbol in the
3213 procedure linkage table. */
3214
3215 if (! ABI_64_P (output_bfd))
3216 {
3217 /* The Solaris native assembler will generate a WPLT30 reloc
3218 for a local symbol if you assemble a call from one
3219 section to another when using -K pic. We treat it as
3220 WDISP30. */
3221 if (h == NULL)
3222 break;
3223 }
3224 /* PR 7027: We need similar behaviour for 64-bit binaries. */
3225 else if (r_type == R_SPARC_WPLT30 && h == NULL)
3226 break;
3227 else
3228 {
3229 BFD_ASSERT (h != NULL);
3230 }
3231
3232 if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL)
3233 {
3234 /* We didn't make a PLT entry for this symbol. This
3235 happens when statically linking PIC code, or when
3236 using -Bsymbolic. */
3237 break;
3238 }
3239
3240 relocation = (htab->elf.splt->output_section->vma
3241 + htab->elf.splt->output_offset
3242 + h->plt.offset);
3243 unresolved_reloc = false;
3244 if (r_type == R_SPARC_PLT32 || r_type == R_SPARC_PLT64)
3245 {
3246 r_type = r_type == R_SPARC_PLT32 ? R_SPARC_32 : R_SPARC_64;
3247 is_plt = true;
3248 goto r_sparc_plt32;
3249 }
3250 break;
3251
3252 case R_SPARC_PC10:
3253 case R_SPARC_PC22:
3254 case R_SPARC_PC_HH22:
3255 case R_SPARC_PC_HM10:
3256 case R_SPARC_PC_LM22:
3257 if (h != NULL
3258 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3259 break;
3260 /* Fall through. */
3261 case R_SPARC_DISP8:
3262 case R_SPARC_DISP16:
3263 case R_SPARC_DISP32:
3264 case R_SPARC_DISP64:
3265 case R_SPARC_WDISP30:
3266 case R_SPARC_WDISP22:
3267 case R_SPARC_WDISP19:
3268 case R_SPARC_WDISP16:
3269 case R_SPARC_WDISP10:
3270 case R_SPARC_8:
3271 case R_SPARC_16:
3272 case R_SPARC_32:
3273 case R_SPARC_HI22:
3274 case R_SPARC_22:
3275 case R_SPARC_13:
3276 case R_SPARC_LO10:
3277 case R_SPARC_UA16:
3278 case R_SPARC_UA32:
3279 case R_SPARC_10:
3280 case R_SPARC_11:
3281 case R_SPARC_64:
3282 case R_SPARC_OLO10:
3283 case R_SPARC_HH22:
3284 case R_SPARC_HM10:
3285 case R_SPARC_LM22:
3286 case R_SPARC_7:
3287 case R_SPARC_5:
3288 case R_SPARC_6:
3289 case R_SPARC_HIX22:
3290 case R_SPARC_LOX10:
3291 case R_SPARC_H44:
3292 case R_SPARC_M44:
3293 case R_SPARC_L44:
3294 case R_SPARC_H34:
3295 case R_SPARC_UA64:
3296 r_sparc_plt32:
3297 if ((input_section->flags & SEC_ALLOC) == 0 || is_vxworks_tls)
3298 break;
3299
3300 /* Copy dynamic function pointer relocations. Don't generate
3301 dynamic relocations against resolved undefined weak symbols
3302 in PIE. */
3303 if ((bfd_link_pic (info)
3304 && (h == NULL
3305 || !(h->root.type == bfd_link_hash_undefweak
3306 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3307 || resolved_to_zero)))
3308 && (! howto->pc_relative
3309 || !SYMBOL_CALLS_LOCAL (info, h)))
3310 || (!bfd_link_pic (info)
3311 && h != NULL
3312 && h->dynindx != -1
3313 && !h->non_got_ref
3314 && ((h->def_dynamic
3315 && !h->def_regular)
3316 || (h->root.type == bfd_link_hash_undefweak
3317 && !resolved_to_zero)
3318 || h->root.type == bfd_link_hash_undefined)))
3319 {
3320 Elf_Internal_Rela outrel;
3321 bool skip, relocate = false;
3322
3323 /* When generating a shared object, these relocations
3324 are copied into the output file to be resolved at run
3325 time. */
3326
3327 BFD_ASSERT (sreloc != NULL);
3328
3329 skip = false;
3330
3331 outrel.r_offset =
3332 _bfd_elf_section_offset (output_bfd, info, input_section,
3333 rel->r_offset);
3334 if (outrel.r_offset == (bfd_vma) -1)
3335 skip = true;
3336 else if (outrel.r_offset == (bfd_vma) -2)
3337 skip = true, relocate = true;
3338 outrel.r_offset += (input_section->output_section->vma
3339 + input_section->output_offset);
3340
3341 /* Optimize unaligned reloc usage now that we know where
3342 it finally resides. */
3343 switch (r_type)
3344 {
3345 case R_SPARC_16:
3346 if (outrel.r_offset & 1)
3347 r_type = R_SPARC_UA16;
3348 break;
3349 case R_SPARC_UA16:
3350 if (!(outrel.r_offset & 1))
3351 r_type = R_SPARC_16;
3352 break;
3353 case R_SPARC_32:
3354 if (outrel.r_offset & 3)
3355 r_type = R_SPARC_UA32;
3356 break;
3357 case R_SPARC_UA32:
3358 if (!(outrel.r_offset & 3))
3359 r_type = R_SPARC_32;
3360 break;
3361 case R_SPARC_64:
3362 if (outrel.r_offset & 7)
3363 r_type = R_SPARC_UA64;
3364 break;
3365 case R_SPARC_UA64:
3366 if (!(outrel.r_offset & 7))
3367 r_type = R_SPARC_64;
3368 break;
3369 case R_SPARC_DISP8:
3370 case R_SPARC_DISP16:
3371 case R_SPARC_DISP32:
3372 case R_SPARC_DISP64:
3373 /* If the symbol is not dynamic, we should not keep
3374 a dynamic relocation. But an .rela.* slot has been
3375 allocated for it, output R_SPARC_NONE.
3376 FIXME: Add code tracking needed dynamic relocs as
3377 e.g. i386 has. */
3378 if (h->dynindx == -1)
3379 skip = true, relocate = true;
3380 break;
3381 }
3382
3383 if (skip)
3384 memset (&outrel, 0, sizeof outrel);
3385 /* h->dynindx may be -1 if the symbol was marked to
3386 become local. */
3387 else if (h != NULL
3388 && h->dynindx != -1
3389 && (_bfd_sparc_elf_howto_table[r_type].pc_relative
3390 || !bfd_link_pic (info)
3391 || !SYMBOLIC_BIND (info, h)
3392 || !h->def_regular))
3393 {
3394 outrel.r_info = SPARC_ELF_R_INFO (htab, rel, h->dynindx, r_type);
3395 outrel.r_addend = rel->r_addend;
3396 }
3397 else
3398 {
3399 if ( (!ABI_64_P (output_bfd) && r_type == R_SPARC_32)
3400 || (ABI_64_P (output_bfd) && r_type == R_SPARC_64))
3401 {
3402 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL,
3403 0, R_SPARC_RELATIVE);
3404 outrel.r_addend = relocation + rel->r_addend;
3405 }
3406 else
3407 {
3408 long indx;
3409
3410 outrel.r_addend = relocation + rel->r_addend;
3411
3412 if (is_plt)
3413 sec = htab->elf.splt;
3414
3415 if (bfd_is_abs_section (sec))
3416 indx = 0;
3417 else if (sec == NULL || sec->owner == NULL)
3418 {
3419 bfd_set_error (bfd_error_bad_value);
3420 return false;
3421 }
3422 else
3423 {
3424 asection *osec;
3425
3426 /* We are turning this relocation into one
3427 against a section symbol. It would be
3428 proper to subtract the symbol's value,
3429 osec->vma, from the emitted reloc addend,
3430 but ld.so expects buggy relocs. */
3431 osec = sec->output_section;
3432 indx = elf_section_data (osec)->dynindx;
3433
3434 if (indx == 0)
3435 {
3436 osec = htab->elf.text_index_section;
3437 indx = elf_section_data (osec)->dynindx;
3438 }
3439
3440 /* FIXME: we really should be able to link non-pic
3441 shared libraries. */
3442 if (indx == 0)
3443 {
3444 BFD_FAIL ();
3445 _bfd_error_handler
3446 (_("%pB: probably compiled without -fPIC?"),
3447 input_bfd);
3448 bfd_set_error (bfd_error_bad_value);
3449 return false;
3450 }
3451 }
3452
3453 outrel.r_info = SPARC_ELF_R_INFO (htab, rel, indx,
3454 r_type);
3455 }
3456 }
3457
3458 sparc_elf_append_rela (output_bfd, sreloc, &outrel);
3459
3460 /* This reloc will be computed at runtime, so there's no
3461 need to do anything now. */
3462 if (! relocate)
3463 continue;
3464 }
3465 break;
3466
3467 case R_SPARC_TLS_GD_HI22:
3468 case R_SPARC_TLS_GD_LO10:
3469 case R_SPARC_TLS_IE_HI22:
3470 case R_SPARC_TLS_IE_LO10:
3471 r_type = sparc_elf_tls_transition (info, input_bfd, r_type,
3472 h == NULL || h->dynindx == -1);
3473 if (r_type == R_SPARC_REV32)
3474 break;
3475 if (h != NULL)
3476 tls_type = _bfd_sparc_elf_hash_entry (h)->tls_type;
3477 else if (local_got_offsets)
3478 tls_type = _bfd_sparc_elf_local_got_tls_type (input_bfd) [r_symndx];
3479 else if (h != NULL)
3480 {
3481 tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type;
3482 if (!bfd_link_dll (info)
3483 && h->dynindx == -1
3484 && tls_type == GOT_TLS_IE)
3485 switch (SPARC_ELF_R_TYPE (rel->r_info))
3486 {
3487 case R_SPARC_TLS_GD_HI22:
3488 case R_SPARC_TLS_IE_HI22:
3489 r_type = R_SPARC_TLS_LE_HIX22;
3490 break;
3491 default:
3492 r_type = R_SPARC_TLS_LE_LOX10;
3493 break;
3494 }
3495 }
3496 else
3497 tls_type = GOT_UNKNOWN;
3498 if (tls_type == GOT_TLS_IE)
3499 switch (r_type)
3500 {
3501 case R_SPARC_TLS_GD_HI22:
3502 r_type = R_SPARC_TLS_IE_HI22;
3503 break;
3504 case R_SPARC_TLS_GD_LO10:
3505 r_type = R_SPARC_TLS_IE_LO10;
3506 break;
3507 }
3508
3509 if (r_type == R_SPARC_TLS_LE_HIX22)
3510 {
3511 relocation = tpoff (info, relocation);
3512 break;
3513 }
3514 if (r_type == R_SPARC_TLS_LE_LOX10)
3515 {
3516 /* Change add into xor. */
3517 relocation = tpoff (info, relocation);
3518 bfd_put_32 (output_bfd, (bfd_get_32 (input_bfd,
3519 contents + rel->r_offset)
3520 | 0x80182000), contents + rel->r_offset);
3521 break;
3522 }
3523
3524 if (h != NULL)
3525 {
3526 off = h->got.offset;
3527 h->got.offset |= 1;
3528 }
3529 else
3530 {
3531 BFD_ASSERT (local_got_offsets != NULL);
3532 off = local_got_offsets[r_symndx];
3533 local_got_offsets[r_symndx] |= 1;
3534 }
3535
3536 r_sparc_tlsldm:
3537 if (htab->elf.sgot == NULL)
3538 abort ();
3539
3540 if ((off & 1) != 0)
3541 off &= ~1;
3542 else
3543 {
3544 Elf_Internal_Rela outrel;
3545 int dr_type, indx;
3546
3547 if (htab->elf.srelgot == NULL)
3548 abort ();
3549
3550 SPARC_ELF_PUT_WORD (htab, output_bfd, 0,
3551 htab->elf.sgot->contents + off);
3552 outrel.r_offset = (htab->elf.sgot->output_section->vma
3553 + htab->elf.sgot->output_offset + off);
3554 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3555 if (r_type == R_SPARC_TLS_IE_HI22
3556 || r_type == R_SPARC_TLS_IE_LO10)
3557 dr_type = SPARC_ELF_TPOFF_RELOC (htab);
3558 else
3559 dr_type = SPARC_ELF_DTPMOD_RELOC (htab);
3560 if (dr_type == SPARC_ELF_TPOFF_RELOC (htab) && indx == 0)
3561 outrel.r_addend = relocation - dtpoff_base (info);
3562 else
3563 outrel.r_addend = 0;
3564 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, indx, dr_type);
3565 sparc_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel);
3566
3567 if (r_type == R_SPARC_TLS_GD_HI22
3568 || r_type == R_SPARC_TLS_GD_LO10)
3569 {
3570 if (indx == 0)
3571 {
3572 BFD_ASSERT (! unresolved_reloc);
3573 SPARC_ELF_PUT_WORD (htab, output_bfd,
3574 relocation - dtpoff_base (info),
3575 (htab->elf.sgot->contents + off
3576 + SPARC_ELF_WORD_BYTES (htab)));
3577 }
3578 else
3579 {
3580 SPARC_ELF_PUT_WORD (htab, output_bfd, 0,
3581 (htab->elf.sgot->contents + off
3582 + SPARC_ELF_WORD_BYTES (htab)));
3583 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, indx,
3584 SPARC_ELF_DTPOFF_RELOC (htab));
3585 outrel.r_offset += SPARC_ELF_WORD_BYTES (htab);
3586 sparc_elf_append_rela (output_bfd, htab->elf.srelgot,
3587 &outrel);
3588 }
3589 }
3590 else if (dr_type == SPARC_ELF_DTPMOD_RELOC (htab))
3591 {
3592 SPARC_ELF_PUT_WORD (htab, output_bfd, 0,
3593 (htab->elf.sgot->contents + off
3594 + SPARC_ELF_WORD_BYTES (htab)));
3595 }
3596 }
3597
3598 if (off >= (bfd_vma) -2)
3599 abort ();
3600
3601 relocation = htab->elf.sgot->output_offset + off - got_base;
3602 unresolved_reloc = false;
3603 howto = _bfd_sparc_elf_howto_table + r_type;
3604 break;
3605
3606 case R_SPARC_TLS_LDM_HI22:
3607 case R_SPARC_TLS_LDM_LO10:
3608 /* LD -> LE */
3609 if (bfd_link_executable (info))
3610 {
3611 bfd_put_32 (output_bfd, SPARC_NOP, contents + rel->r_offset);
3612 continue;
3613 }
3614 off = htab->tls_ldm_got.offset;
3615 htab->tls_ldm_got.offset |= 1;
3616 goto r_sparc_tlsldm;
3617
3618 case R_SPARC_TLS_LDO_HIX22:
3619 case R_SPARC_TLS_LDO_LOX10:
3620 /* LD -> LE */
3621 if (bfd_link_executable (info))
3622 {
3623 if (r_type == R_SPARC_TLS_LDO_HIX22)
3624 r_type = R_SPARC_TLS_LE_HIX22;
3625 else
3626 r_type = R_SPARC_TLS_LE_LOX10;
3627 }
3628 else
3629 {
3630 relocation -= dtpoff_base (info);
3631 break;
3632 }
3633 /* Fall through. */
3634
3635 case R_SPARC_TLS_LE_HIX22:
3636 case R_SPARC_TLS_LE_LOX10:
3637 if (!bfd_link_executable (info))
3638 {
3639 Elf_Internal_Rela outrel;
3640 bfd_vma offset
3641 = _bfd_elf_section_offset (output_bfd, info, input_section,
3642 rel->r_offset);
3643 if (offset == (bfd_vma) -1 || offset == (bfd_vma) -2)
3644 memset (&outrel, 0, sizeof outrel);
3645 else
3646 {
3647 outrel.r_offset = offset
3648 + input_section->output_section->vma
3649 + input_section->output_offset;
3650 outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, r_type);
3651 outrel.r_addend
3652 = relocation - dtpoff_base (info) + rel->r_addend;
3653 }
3654
3655 BFD_ASSERT (sreloc != NULL);
3656 sparc_elf_append_rela (output_bfd, sreloc, &outrel);
3657 continue;
3658 }
3659 relocation = tpoff (info, relocation);
3660 break;
3661
3662 case R_SPARC_TLS_LDM_CALL:
3663 /* LD -> LE */
3664 if (bfd_link_executable (info))
3665 {
3666 /* mov %g0, %o0 */
3667 bfd_put_32 (output_bfd, 0x90100000, contents + rel->r_offset);
3668 continue;
3669 }
3670 /* Fall through */
3671
3672 case R_SPARC_TLS_GD_CALL:
3673 if (h != NULL)
3674 tls_type = _bfd_sparc_elf_hash_entry (h)->tls_type;
3675 else if (local_got_offsets)
3676 tls_type = _bfd_sparc_elf_local_got_tls_type (input_bfd) [r_symndx];
3677 else if (h != NULL)
3678 tls_type = _bfd_sparc_elf_hash_entry(h)->tls_type;
3679 else
3680 tls_type = GOT_UNKNOWN;
3681 /* GD -> IE or LE */
3682 if (bfd_link_executable (info)
3683 || (r_type == R_SPARC_TLS_GD_CALL && tls_type == GOT_TLS_IE))
3684 {
3685 Elf_Internal_Rela *rel2;
3686 bfd_vma insn;
3687
3688 /* GD -> LE */
3689 if (bfd_link_executable (info) && (h == NULL || h->dynindx == -1))
3690 {
3691 bfd_put_32 (output_bfd, SPARC_NOP, contents + rel->r_offset);
3692 continue;
3693 }
3694
3695 /* GD -> IE */
3696 if (rel + 1 < relend
3697 && SPARC_ELF_R_TYPE (rel[1].r_info) == R_SPARC_TLS_GD_ADD
3698 && rel[1].r_offset == rel->r_offset + 4
3699 && SPARC_ELF_R_SYMNDX (htab, rel[1].r_info) == r_symndx
3700 && (((insn = bfd_get_32 (input_bfd,
3701 contents + rel[1].r_offset))
3702 >> 25) & 0x1f) == 8)
3703 {
3704 /* We have
3705 call __tls_get_addr, %tgd_call(foo)
3706 add %reg1, %reg2, %o0, %tgd_add(foo)
3707 and change it into IE:
3708 {ld,ldx} [%reg1 + %reg2], %o0, %tie_ldx(foo)
3709 add %g7, %o0, %o0, %tie_add(foo).
3710 add is 0x80000000 | (rd << 25) | (rs1 << 14) | rs2,
3711 ld is 0xc0000000 | (rd << 25) | (rs1 << 14) | rs2,
3712 ldx is 0xc0580000 | (rd << 25) | (rs1 << 14) | rs2. */
3713 bfd_put_32 (output_bfd, insn | (ABI_64_P (output_bfd) ? 0xc0580000 : 0xc0000000),
3714 contents + rel->r_offset);
3715 bfd_put_32 (output_bfd, 0x9001c008,
3716 contents + rel->r_offset + 4);
3717 rel++;
3718 continue;
3719 }
3720
3721 /* We cannot just overwrite the delay slot instruction,
3722 as it might be what puts the %o0 argument to
3723 __tls_get_addr into place. So we have to transpose
3724 the delay slot with the add we patch in. */
3725 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
3726 bfd_put_32 (output_bfd, insn,
3727 contents + rel->r_offset);
3728 bfd_put_32 (output_bfd, 0x9001c008,
3729 contents + rel->r_offset + 4);
3730
3731 rel2 = rel;
3732 while ((rel2 = sparc_elf_find_reloc_at_ofs (rel2 + 1, relend,
3733 rel->r_offset + 4))
3734 != NULL)
3735 {
3736 /* If the instruction we moved has a relocation attached to
3737 it, adjust the offset so that it will apply to the correct
3738 instruction. */
3739 rel2->r_offset -= 4;
3740 }
3741 continue;
3742 }
3743
3744 h = (struct elf_link_hash_entry *)
3745 bfd_link_hash_lookup (info->hash, "__tls_get_addr", false,
3746 false, true);
3747 BFD_ASSERT (h != NULL);
3748 r_type = R_SPARC_WPLT30;
3749 howto = _bfd_sparc_elf_howto_table + r_type;
3750 goto r_sparc_wplt30;
3751
3752 case R_SPARC_TLS_GD_ADD:
3753 if (h != NULL)
3754 tls_type = _bfd_sparc_elf_hash_entry (h)->tls_type;
3755 else if (local_got_offsets)
3756 tls_type = _bfd_sparc_elf_local_got_tls_type (input_bfd) [r_symndx];
3757 else
3758 tls_type = GOT_UNKNOWN;
3759 /* GD -> IE or LE */
3760 if (bfd_link_executable (info) || tls_type == GOT_TLS_IE)
3761 {
3762 /* add %reg1, %reg2, %reg3, %tgd_add(foo)
3763 changed into IE:
3764 {ld,ldx} [%reg1 + %reg2], %reg3, %tie_ldx(foo)
3765 or LE:
3766 add %g7, %reg2, %reg3. */
3767 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3768 if (bfd_link_executable (info) && (h == NULL || h->dynindx == -1))
3769 relocation = (insn & ~0x7c000) | 0x1c000;
3770 else
3771 relocation = insn | (ABI_64_P (output_bfd) ? 0xc0580000 : 0xc0000000);
3772 bfd_put_32 (output_bfd, relocation, contents + rel->r_offset);
3773 }
3774 continue;
3775
3776 case R_SPARC_TLS_LDM_ADD:
3777 /* LD -> LE */
3778 if (bfd_link_executable (info))
3779 bfd_put_32 (output_bfd, SPARC_NOP, contents + rel->r_offset);
3780 continue;
3781
3782 case R_SPARC_TLS_LDO_ADD:
3783 /* LD -> LE */
3784 if (bfd_link_executable (info))
3785 {
3786 /* Change rs1 into %g7. */
3787 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3788 insn = (insn & ~0x7c000) | 0x1c000;
3789 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3790 }
3791 continue;
3792
3793 case R_SPARC_TLS_IE_LD:
3794 case R_SPARC_TLS_IE_LDX:
3795 /* IE -> LE */
3796 if (bfd_link_executable (info) && (h == NULL || h->dynindx == -1))
3797 {
3798 bfd_vma insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3799 int rs2 = insn & 0x1f;
3800 int rd = (insn >> 25) & 0x1f;
3801
3802 if (rs2 == rd)
3803 relocation = SPARC_NOP;
3804 else
3805 relocation = 0x80100000 | (insn & 0x3e00001f);
3806 bfd_put_32 (output_bfd, relocation, contents + rel->r_offset);
3807 }
3808 continue;
3809
3810 case R_SPARC_TLS_IE_ADD:
3811 /* Totally useless relocation. */
3812 continue;
3813
3814 case R_SPARC_TLS_DTPOFF32:
3815 case R_SPARC_TLS_DTPOFF64:
3816 relocation -= dtpoff_base (info);
3817 break;
3818
3819 default:
3820 break;
3821 }
3822
3823 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3824 because such sections are not SEC_ALLOC and thus ld.so will
3825 not process them. */
3826 if (unresolved_reloc
3827 && !((input_section->flags & SEC_DEBUGGING) != 0
3828 && h->def_dynamic)
3829 && _bfd_elf_section_offset (output_bfd, info, input_section,
3830 rel->r_offset) != (bfd_vma) -1)
3831 _bfd_error_handler
3832 /* xgettext:c-format */
3833 (_("%pB(%pA+%#" PRIx64 "): "
3834 "unresolvable %s relocation against symbol `%s'"),
3835 input_bfd,
3836 input_section,
3837 (uint64_t) rel->r_offset,
3838 howto->name,
3839 h->root.root.string);
3840
3841 r = bfd_reloc_continue;
3842 if (r_type == R_SPARC_OLO10)
3843 {
3844 bfd_vma x;
3845
3846 if (! ABI_64_P (output_bfd))
3847 abort ();
3848
3849 relocation += rel->r_addend;
3850 relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info);
3851
3852 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
3853 x = (x & ~(bfd_vma) 0x1fff) | (relocation & 0x1fff);
3854 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
3855
3856 r = bfd_check_overflow (howto->complain_on_overflow,
3857 howto->bitsize, howto->rightshift,
3858 bfd_arch_bits_per_address (input_bfd),
3859 relocation);
3860 }
3861 else if (r_type == R_SPARC_WDISP16)
3862 {
3863 bfd_vma x;
3864
3865 relocation += rel->r_addend;
3866 relocation -= (input_section->output_section->vma
3867 + input_section->output_offset);
3868 relocation -= rel->r_offset;
3869
3870 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
3871 x |= ((((relocation >> 2) & 0xc000) << 6)
3872 | ((relocation >> 2) & 0x3fff));
3873 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
3874
3875 r = bfd_check_overflow (howto->complain_on_overflow,
3876 howto->bitsize, howto->rightshift,
3877 bfd_arch_bits_per_address (input_bfd),
3878 relocation);
3879 }
3880 else if (r_type == R_SPARC_WDISP10)
3881 {
3882 bfd_vma x;
3883
3884 relocation += rel->r_addend;
3885 relocation -= (input_section->output_section->vma
3886 + input_section->output_offset);
3887 relocation -= rel->r_offset;
3888
3889 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
3890 x |= ((((relocation >> 2) & 0x300) << 11)
3891 | (((relocation >> 2) & 0xff) << 5));
3892 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
3893
3894 r = bfd_check_overflow (howto->complain_on_overflow,
3895 howto->bitsize, howto->rightshift,
3896 bfd_arch_bits_per_address (input_bfd),
3897 relocation);
3898 }
3899 else if (r_type == R_SPARC_REV32)
3900 {
3901 bfd_vma x;
3902
3903 relocation = relocation + rel->r_addend;
3904
3905 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
3906 x = x + relocation;
3907 bfd_putl32 (/*input_bfd,*/ x, contents + rel->r_offset);
3908 r = bfd_reloc_ok;
3909 }
3910 else if (r_type == R_SPARC_TLS_LDO_HIX22
3911 || r_type == R_SPARC_TLS_LE_HIX22)
3912 {
3913 bfd_vma x;
3914
3915 relocation += rel->r_addend;
3916 if (r_type == R_SPARC_TLS_LE_HIX22)
3917 relocation ^= MINUS_ONE;
3918
3919 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
3920 x = (x & ~(bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff);
3921 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
3922 r = bfd_reloc_ok;
3923 }
3924 else if (r_type == R_SPARC_TLS_LDO_LOX10
3925 || r_type == R_SPARC_TLS_LE_LOX10)
3926 {
3927 bfd_vma x;
3928
3929 relocation += rel->r_addend;
3930 relocation &= 0x3ff;
3931 if (r_type == R_SPARC_TLS_LE_LOX10)
3932 relocation |= 0x1c00;
3933
3934 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
3935 x = (x & ~(bfd_vma) 0x1fff) | relocation;
3936 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
3937
3938 r = bfd_reloc_ok;
3939 }
3940 else if (r_type == R_SPARC_HIX22
3941 || r_type == R_SPARC_GOTDATA_HIX22
3942 || r_type == R_SPARC_GOTDATA_OP_HIX22)
3943 {
3944 bfd_vma x;
3945
3946 relocation += rel->r_addend;
3947 if (r_type == R_SPARC_HIX22
3948 || (bfd_signed_vma) relocation < 0)
3949 relocation = relocation ^ MINUS_ONE;
3950
3951 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
3952 x = (x & ~(bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff);
3953 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
3954
3955 r = bfd_check_overflow (howto->complain_on_overflow,
3956 howto->bitsize, howto->rightshift,
3957 bfd_arch_bits_per_address (input_bfd),
3958 relocation);
3959 }
3960 else if (r_type == R_SPARC_LOX10
3961 || r_type == R_SPARC_GOTDATA_LOX10
3962 || r_type == R_SPARC_GOTDATA_OP_LOX10)
3963 {
3964 bfd_vma x;
3965
3966 relocation += rel->r_addend;
3967 if (r_type == R_SPARC_LOX10
3968 || (bfd_signed_vma) relocation < 0)
3969 relocation = (relocation & 0x3ff) | 0x1c00;
3970 else
3971 relocation = (relocation & 0x3ff);
3972
3973 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
3974 x = (x & ~(bfd_vma) 0x1fff) | relocation;
3975 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
3976
3977 r = bfd_reloc_ok;
3978 }
3979 else if ((r_type == R_SPARC_WDISP30 || r_type == R_SPARC_WPLT30)
3980 && sec_do_relax (input_section)
3981 && rel->r_offset + 4 < input_section->size)
3982 {
3983 #define G0 0
3984 #define O7 15
3985 #define XCC (2 << 20)
3986 #define COND(x) (((x)&0xf)<<25)
3987 #define CONDA COND(0x8)
3988 #define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC)
3989 #define INSN_BA (F2(0,2) | CONDA)
3990 #define INSN_OR F3(2, 0x2, 0)
3991 #define INSN_NOP F2(0,4)
3992
3993 bfd_vma x, y;
3994
3995 /* If the instruction is a call with either:
3996 restore
3997 arithmetic instruction with rd == %o7
3998 where rs1 != %o7 and rs2 if it is register != %o7
3999 then we can optimize if the call destination is near
4000 by changing the call into a branch always. */
4001 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
4002 y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
4003 if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2))
4004 {
4005 if (((y & OP3(~0)) == OP3(0x3d) /* restore */
4006 || ((y & OP3(0x28)) == 0 /* arithmetic */
4007 && (y & RD(~0)) == RD(O7)))
4008 && (y & RS1(~0)) != RS1(O7)
4009 && ((y & F3I(~0))
4010 || (y & RS2(~0)) != RS2(O7)))
4011 {
4012 bfd_vma reloc;
4013
4014 reloc = relocation + rel->r_addend - rel->r_offset;
4015 reloc -= (input_section->output_section->vma
4016 + input_section->output_offset);
4017
4018 /* Ensure the branch fits into simm22. */
4019 if ((reloc & 3) == 0
4020 && ((reloc & ~(bfd_vma)0x7fffff) == 0
4021 || ((reloc | 0x7fffff) == ~(bfd_vma)0)))
4022 {
4023 reloc >>= 2;
4024
4025 /* Check whether it fits into simm19. */
4026 if (((reloc & 0x3c0000) == 0
4027 || (reloc & 0x3c0000) == 0x3c0000)
4028 && (ABI_64_P (output_bfd)
4029 || elf_elfheader (output_bfd)->e_flags & EF_SPARC_32PLUS))
4030 x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */
4031 else
4032 x = INSN_BA | (reloc & 0x3fffff); /* ba */
4033 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
4034 r = bfd_reloc_ok;
4035 if (rel->r_offset >= 4
4036 && (y & (0xffffffff ^ RS1(~0)))
4037 == (INSN_OR | RD(O7) | RS2(G0)))
4038 {
4039 bfd_vma z;
4040 unsigned int reg;
4041
4042 z = bfd_get_32 (input_bfd,
4043 contents + rel->r_offset - 4);
4044 if ((z & (0xffffffff ^ RD(~0)))
4045 != (INSN_OR | RS1(O7) | RS2(G0)))
4046 continue;
4047
4048 /* The sequence was
4049 or %o7, %g0, %rN
4050 call foo
4051 or %rN, %g0, %o7
4052
4053 If call foo was replaced with ba, replace
4054 or %rN, %g0, %o7 with nop. */
4055
4056 reg = (y & RS1(~0)) >> 14;
4057 if (reg != ((z & RD(~0)) >> 25)
4058 || reg == G0 || reg == O7)
4059 continue;
4060
4061 bfd_put_32 (input_bfd, (bfd_vma) INSN_NOP,
4062 contents + rel->r_offset + 4);
4063 }
4064
4065 }
4066 }
4067 }
4068 }
4069
4070 if (r == bfd_reloc_continue)
4071 {
4072 do_relocation:
4073 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4074 contents, rel->r_offset,
4075 relocation, rel->r_addend);
4076 }
4077 if (r != bfd_reloc_ok)
4078 {
4079 switch (r)
4080 {
4081 default:
4082 case bfd_reloc_outofrange:
4083 abort ();
4084 case bfd_reloc_overflow:
4085 {
4086 const char *name;
4087
4088 /* The Solaris native linker silently disregards overflows.
4089 We don't, but this breaks stabs debugging info, whose
4090 relocations are only 32-bits wide. Ignore overflows in
4091 this case and also for discarded entries. */
4092 if ((r_type == R_SPARC_32
4093 || r_type == R_SPARC_UA32
4094 || r_type == R_SPARC_DISP32)
4095 && (((input_section->flags & SEC_DEBUGGING) != 0
4096 && strcmp (bfd_section_name (input_section),
4097 ".stab") == 0)
4098 || _bfd_elf_section_offset (output_bfd, info,
4099 input_section,
4100 rel->r_offset)
4101 == (bfd_vma)-1))
4102 break;
4103
4104 if (h != NULL)
4105 {
4106 /* Assume this is a call protected by other code that
4107 detect the symbol is undefined. If this is the case,
4108 we can safely ignore the overflow. If not, the
4109 program is hosed anyway, and a little warning isn't
4110 going to help. */
4111 if (h->root.type == bfd_link_hash_undefweak
4112 && howto->pc_relative)
4113 break;
4114
4115 name = NULL;
4116 }
4117 else
4118 {
4119 name = bfd_elf_string_from_elf_section (input_bfd,
4120 symtab_hdr->sh_link,
4121 sym->st_name);
4122 if (name == NULL)
4123 return false;
4124 if (*name == '\0')
4125 name = bfd_section_name (sec);
4126 }
4127 (*info->callbacks->reloc_overflow)
4128 (info, (h ? &h->root : NULL), name, howto->name,
4129 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4130 }
4131 break;
4132 }
4133 }
4134 }
4135
4136 return true;
4137 }
4138
4139 /* Build a VxWorks PLT entry. PLT_INDEX is the index of the PLT entry
4140 and PLT_OFFSET is the byte offset from the start of .plt. GOT_OFFSET
4141 is the offset of the associated .got.plt entry from
4142 _GLOBAL_OFFSET_TABLE_. */
4143
4144 static void
sparc_vxworks_build_plt_entry(bfd * output_bfd,struct bfd_link_info * info,bfd_vma plt_offset,bfd_vma plt_index,bfd_vma got_offset)4145 sparc_vxworks_build_plt_entry (bfd *output_bfd, struct bfd_link_info *info,
4146 bfd_vma plt_offset, bfd_vma plt_index,
4147 bfd_vma got_offset)
4148 {
4149 bfd_vma got_base;
4150 const bfd_vma *plt_entry;
4151 struct _bfd_sparc_elf_link_hash_table *htab;
4152 bfd_byte *loc;
4153 Elf_Internal_Rela rela;
4154
4155 htab = _bfd_sparc_elf_hash_table (info);
4156 BFD_ASSERT (htab != NULL);
4157
4158 if (bfd_link_pic (info))
4159 {
4160 plt_entry = sparc_vxworks_shared_plt_entry;
4161 got_base = 0;
4162 }
4163 else
4164 {
4165 plt_entry = sparc_vxworks_exec_plt_entry;
4166 got_base = (htab->elf.hgot->root.u.def.value
4167 + htab->elf.hgot->root.u.def.section->output_offset
4168 + htab->elf.hgot->root.u.def.section->output_section->vma);
4169 }
4170
4171 /* Fill in the entry in the procedure linkage table. */
4172 bfd_put_32 (output_bfd, plt_entry[0] + ((got_base + got_offset) >> 10),
4173 htab->elf.splt->contents + plt_offset);
4174 bfd_put_32 (output_bfd, plt_entry[1] + ((got_base + got_offset) & 0x3ff),
4175 htab->elf.splt->contents + plt_offset + 4);
4176 bfd_put_32 (output_bfd, plt_entry[2],
4177 htab->elf.splt->contents + plt_offset + 8);
4178 bfd_put_32 (output_bfd, plt_entry[3],
4179 htab->elf.splt->contents + plt_offset + 12);
4180 bfd_put_32 (output_bfd, plt_entry[4],
4181 htab->elf.splt->contents + plt_offset + 16);
4182 bfd_put_32 (output_bfd, plt_entry[5] + (plt_index >> 10),
4183 htab->elf.splt->contents + plt_offset + 20);
4184 /* PC-relative displacement for a branch to the start of
4185 the PLT section. */
4186 bfd_put_32 (output_bfd, plt_entry[6] + (((-plt_offset - 24) >> 2)
4187 & 0x003fffff),
4188 htab->elf.splt->contents + plt_offset + 24);
4189 bfd_put_32 (output_bfd, plt_entry[7] + (plt_index & 0x3ff),
4190 htab->elf.splt->contents + plt_offset + 28);
4191
4192 /* Fill in the .got.plt entry, pointing initially at the
4193 second half of the PLT entry. */
4194 BFD_ASSERT (htab->elf.sgotplt != NULL);
4195 bfd_put_32 (output_bfd,
4196 htab->elf.splt->output_section->vma
4197 + htab->elf.splt->output_offset
4198 + plt_offset + 20,
4199 htab->elf.sgotplt->contents + got_offset);
4200
4201 /* Add relocations to .rela.plt.unloaded. */
4202 if (!bfd_link_pic (info))
4203 {
4204 loc = (htab->srelplt2->contents
4205 + (2 + 3 * plt_index) * sizeof (Elf32_External_Rela));
4206
4207 /* Relocate the initial sethi. */
4208 rela.r_offset = (htab->elf.splt->output_section->vma
4209 + htab->elf.splt->output_offset
4210 + plt_offset);
4211 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22);
4212 rela.r_addend = got_offset;
4213 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4214 loc += sizeof (Elf32_External_Rela);
4215
4216 /* Likewise the following or. */
4217 rela.r_offset += 4;
4218 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10);
4219 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4220 loc += sizeof (Elf32_External_Rela);
4221
4222 /* Relocate the .got.plt entry. */
4223 rela.r_offset = (htab->elf.sgotplt->output_section->vma
4224 + htab->elf.sgotplt->output_offset
4225 + got_offset);
4226 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_SPARC_32);
4227 rela.r_addend = plt_offset + 20;
4228 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4229 }
4230 }
4231
4232 /* Finish up dynamic symbol handling. We set the contents of various
4233 dynamic sections here. */
4234
4235 bool
_bfd_sparc_elf_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)4236 _bfd_sparc_elf_finish_dynamic_symbol (bfd *output_bfd,
4237 struct bfd_link_info *info,
4238 struct elf_link_hash_entry *h,
4239 Elf_Internal_Sym *sym)
4240 {
4241 struct _bfd_sparc_elf_link_hash_table *htab;
4242 const struct elf_backend_data *bed;
4243 struct _bfd_sparc_elf_link_hash_entry *eh;
4244 bool resolved_to_zero;
4245
4246 htab = _bfd_sparc_elf_hash_table (info);
4247 BFD_ASSERT (htab != NULL);
4248 bed = get_elf_backend_data (output_bfd);
4249
4250 eh = (struct _bfd_sparc_elf_link_hash_entry *) h;
4251
4252 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4253 resolved undefined weak symbols in executable so that their
4254 references have value 0 at run-time. */
4255 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
4256
4257 if (h->plt.offset != (bfd_vma) -1)
4258 {
4259 asection *splt;
4260 asection *srela;
4261 Elf_Internal_Rela rela;
4262 bfd_byte *loc;
4263 bfd_vma r_offset, got_offset;
4264 int rela_index;
4265
4266 /* When building a static executable, use .iplt and
4267 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4268 if (htab->elf.splt != NULL)
4269 {
4270 splt = htab->elf.splt;
4271 srela = htab->elf.srelplt;
4272 }
4273 else
4274 {
4275 splt = htab->elf.iplt;
4276 srela = htab->elf.irelplt;
4277 }
4278
4279 if (splt == NULL || srela == NULL)
4280 abort ();
4281
4282 /* Fill in the entry in the .rela.plt section. */
4283 if (htab->elf.target_os == is_vxworks)
4284 {
4285 /* Work out the index of this PLT entry. */
4286 rela_index = ((h->plt.offset - htab->plt_header_size)
4287 / htab->plt_entry_size);
4288
4289 /* Calculate the offset of the associated .got.plt entry.
4290 The first three entries are reserved. */
4291 got_offset = (rela_index + 3) * 4;
4292
4293 sparc_vxworks_build_plt_entry (output_bfd, info, h->plt.offset,
4294 rela_index, got_offset);
4295
4296
4297 /* On VxWorks, the relocation points to the .got.plt entry,
4298 not the .plt entry. */
4299 rela.r_offset = (htab->elf.sgotplt->output_section->vma
4300 + htab->elf.sgotplt->output_offset
4301 + got_offset);
4302 rela.r_addend = 0;
4303 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx,
4304 R_SPARC_JMP_SLOT);
4305 }
4306 else
4307 {
4308 bool ifunc = false;
4309
4310 /* Fill in the entry in the procedure linkage table. */
4311 rela_index = SPARC_ELF_BUILD_PLT_ENTRY (htab, output_bfd, splt,
4312 h->plt.offset, splt->size,
4313 &r_offset);
4314
4315 if (h == NULL
4316 || h->dynindx == -1
4317 || ((bfd_link_executable (info)
4318 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4319 && h->def_regular
4320 && h->type == STT_GNU_IFUNC))
4321 {
4322 ifunc = true;
4323 BFD_ASSERT (h == NULL
4324 || (h->type == STT_GNU_IFUNC
4325 && h->def_regular
4326 && (h->root.type == bfd_link_hash_defined
4327 || h->root.type == bfd_link_hash_defweak)));
4328 }
4329
4330 rela.r_offset = r_offset
4331 + (splt->output_section->vma + splt->output_offset);
4332 if (ABI_64_P (output_bfd)
4333 && h->plt.offset >= (PLT64_LARGE_THRESHOLD * PLT64_ENTRY_SIZE))
4334 {
4335 if (ifunc)
4336 {
4337 rela.r_addend = (h->root.u.def.section->output_section->vma
4338 + h->root.u.def.section->output_offset
4339 + h->root.u.def.value);
4340 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0,
4341 R_SPARC_IRELATIVE);
4342 }
4343 else
4344 {
4345 rela.r_addend = (-(h->plt.offset + 4)
4346 - splt->output_section->vma
4347 - splt->output_offset);
4348 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx,
4349 R_SPARC_JMP_SLOT);
4350 }
4351 }
4352 else
4353 {
4354 if (ifunc)
4355 {
4356 rela.r_addend = (h->root.u.def.section->output_section->vma
4357 + h->root.u.def.section->output_offset
4358 + h->root.u.def.value);
4359 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0,
4360 R_SPARC_JMP_IREL);
4361 }
4362 else
4363 {
4364 rela.r_addend = 0;
4365 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx,
4366 R_SPARC_JMP_SLOT);
4367 }
4368 }
4369 }
4370
4371 /* Adjust for the first 4 reserved elements in the .plt section
4372 when setting the offset in the .rela.plt section.
4373 Sun forgot to read their own ABI and copied elf32-sparc behaviour,
4374 thus .plt[4] has corresponding .rela.plt[0] and so on. */
4375
4376 loc = srela->contents;
4377 loc += rela_index * bed->s->sizeof_rela;
4378 bed->s->swap_reloca_out (output_bfd, &rela, loc);
4379
4380 if (!resolved_to_zero && !h->def_regular)
4381 {
4382 /* Mark the symbol as undefined, rather than as defined in
4383 the .plt section. Leave the value alone. */
4384 sym->st_shndx = SHN_UNDEF;
4385 /* If the symbol is weak, we do need to clear the value.
4386 Otherwise, the PLT entry would provide a definition for
4387 the symbol even if the symbol wasn't defined anywhere,
4388 and so the symbol would never be NULL. */
4389 if (!h->ref_regular_nonweak)
4390 sym->st_value = 0;
4391 }
4392 }
4393
4394 /* Don't generate dynamic GOT relocation against resolved undefined weak
4395 symbols in an executable. */
4396 if (h->got.offset != (bfd_vma) -1
4397 && _bfd_sparc_elf_hash_entry(h)->tls_type != GOT_TLS_GD
4398 && _bfd_sparc_elf_hash_entry(h)->tls_type != GOT_TLS_IE
4399 && !(h->root.type == bfd_link_hash_undefweak
4400 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4401 || resolved_to_zero)))
4402 {
4403 asection *sgot;
4404 asection *srela;
4405 Elf_Internal_Rela rela;
4406
4407 /* This symbol has an entry in the GOT. Set it up. */
4408
4409 sgot = htab->elf.sgot;
4410 srela = htab->elf.srelgot;
4411 BFD_ASSERT (sgot != NULL && srela != NULL);
4412
4413 rela.r_offset = (sgot->output_section->vma
4414 + sgot->output_offset
4415 + (h->got.offset &~ (bfd_vma) 1));
4416
4417 /* If this is a -Bsymbolic link, and the symbol is defined
4418 locally, we just want to emit a RELATIVE reloc. Likewise if
4419 the symbol was forced to be local because of a version file.
4420 The entry in the global offset table will already have been
4421 initialized in the relocate_section function. */
4422 if (! bfd_link_pic (info)
4423 && h->type == STT_GNU_IFUNC
4424 && h->def_regular)
4425 {
4426 asection *plt;
4427
4428 /* We load the GOT entry with the PLT entry. */
4429 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4430 SPARC_ELF_PUT_WORD (htab, output_bfd,
4431 (plt->output_section->vma
4432 + plt->output_offset + h->plt.offset),
4433 htab->elf.sgot->contents
4434 + (h->got.offset & ~(bfd_vma) 1));
4435 return true;
4436 }
4437
4438 if (bfd_link_pic (info)
4439 && (h->root.type == bfd_link_hash_defined
4440 || h->root.type == bfd_link_hash_defweak)
4441 && SYMBOL_REFERENCES_LOCAL (info, h))
4442 {
4443 asection *sec = h->root.u.def.section;
4444 if (h->type == STT_GNU_IFUNC)
4445 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, R_SPARC_IRELATIVE);
4446 else
4447 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, 0, R_SPARC_RELATIVE);
4448 rela.r_addend = (h->root.u.def.value
4449 + sec->output_section->vma
4450 + sec->output_offset);
4451 }
4452 else
4453 {
4454 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, R_SPARC_GLOB_DAT);
4455 rela.r_addend = 0;
4456 }
4457
4458 SPARC_ELF_PUT_WORD (htab, output_bfd, 0,
4459 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
4460 sparc_elf_append_rela (output_bfd, srela, &rela);
4461 }
4462
4463 if (h->needs_copy)
4464 {
4465 asection *s;
4466 Elf_Internal_Rela rela;
4467
4468 /* This symbols needs a copy reloc. Set it up. */
4469 BFD_ASSERT (h->dynindx != -1);
4470
4471 rela.r_offset = (h->root.u.def.value
4472 + h->root.u.def.section->output_section->vma
4473 + h->root.u.def.section->output_offset);
4474 rela.r_info = SPARC_ELF_R_INFO (htab, NULL, h->dynindx, R_SPARC_COPY);
4475 rela.r_addend = 0;
4476 if (h->root.u.def.section == htab->elf.sdynrelro)
4477 s = htab->elf.sreldynrelro;
4478 else
4479 s = htab->elf.srelbss;
4480 sparc_elf_append_rela (output_bfd, s, &rela);
4481 }
4482
4483 /* Mark some specially defined symbols as absolute. On VxWorks,
4484 _GLOBAL_OFFSET_TABLE_ is not absolute: it is relative to the
4485 ".got" section. Likewise _PROCEDURE_LINKAGE_TABLE_ and ".plt". */
4486 if (sym != NULL
4487 && (h == htab->elf.hdynamic
4488 || (htab->elf.target_os != is_vxworks
4489 && (h == htab->elf.hgot || h == htab->elf.hplt))))
4490 sym->st_shndx = SHN_ABS;
4491
4492 return true;
4493 }
4494
4495 /* Finish up the dynamic sections. */
4496
4497 static bool
sparc_finish_dyn(bfd * output_bfd,struct bfd_link_info * info,bfd * dynobj,asection * sdyn,asection * splt ATTRIBUTE_UNUSED)4498 sparc_finish_dyn (bfd *output_bfd, struct bfd_link_info *info,
4499 bfd *dynobj, asection *sdyn,
4500 asection *splt ATTRIBUTE_UNUSED)
4501 {
4502 struct _bfd_sparc_elf_link_hash_table *htab;
4503 const struct elf_backend_data *bed;
4504 bfd_byte *dyncon, *dynconend;
4505 size_t dynsize;
4506 int stt_regidx = -1;
4507 bool abi_64_p;
4508
4509 htab = _bfd_sparc_elf_hash_table (info);
4510 BFD_ASSERT (htab != NULL);
4511 bed = get_elf_backend_data (output_bfd);
4512 dynsize = bed->s->sizeof_dyn;
4513 dynconend = sdyn->contents + sdyn->size;
4514 abi_64_p = ABI_64_P (output_bfd);
4515 for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize)
4516 {
4517 Elf_Internal_Dyn dyn;
4518 bool size;
4519
4520 bed->s->swap_dyn_in (dynobj, dyncon, &dyn);
4521
4522 if (htab->elf.target_os == is_vxworks && dyn.d_tag == DT_PLTGOT)
4523 {
4524 /* On VxWorks, DT_PLTGOT should point to the start of the GOT,
4525 not to the start of the PLT. */
4526 if (htab->elf.sgotplt)
4527 {
4528 dyn.d_un.d_val = (htab->elf.sgotplt->output_section->vma
4529 + htab->elf.sgotplt->output_offset);
4530 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon);
4531 }
4532 }
4533 else if (htab->elf.target_os == is_vxworks
4534 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4535 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon);
4536 else if (abi_64_p && dyn.d_tag == DT_SPARC_REGISTER)
4537 {
4538 if (stt_regidx == -1)
4539 {
4540 stt_regidx =
4541 _bfd_elf_link_lookup_local_dynindx (info, output_bfd, -1);
4542 if (stt_regidx == -1)
4543 return false;
4544 }
4545 dyn.d_un.d_val = stt_regidx++;
4546 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon);
4547 }
4548 else
4549 {
4550 asection *s;
4551
4552 switch (dyn.d_tag)
4553 {
4554 case DT_PLTGOT:
4555 s = htab->elf.splt;
4556 size = false;
4557 break;
4558 case DT_PLTRELSZ:
4559 s = htab->elf.srelplt;
4560 size = true;
4561 break;
4562 case DT_JMPREL:
4563 s = htab->elf.srelplt;
4564 size = false;
4565 break;
4566 default:
4567 continue;
4568 }
4569
4570 if (s == NULL)
4571 dyn.d_un.d_val = 0;
4572 else
4573 {
4574 if (!size)
4575 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4576 else
4577 dyn.d_un.d_val = s->size;
4578 }
4579 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon);
4580 }
4581 }
4582 return true;
4583 }
4584
4585 /* Install the first PLT entry in a VxWorks executable and make sure that
4586 .rela.plt.unloaded relocations have the correct symbol indexes. */
4587
4588 static void
sparc_vxworks_finish_exec_plt(bfd * output_bfd,struct bfd_link_info * info)4589 sparc_vxworks_finish_exec_plt (bfd *output_bfd, struct bfd_link_info *info)
4590 {
4591 struct _bfd_sparc_elf_link_hash_table *htab;
4592 Elf_Internal_Rela rela;
4593 bfd_vma got_base;
4594 bfd_byte *loc;
4595
4596 htab = _bfd_sparc_elf_hash_table (info);
4597 BFD_ASSERT (htab != NULL);
4598
4599 /* Calculate the absolute value of _GLOBAL_OFFSET_TABLE_. */
4600 got_base = (htab->elf.hgot->root.u.def.section->output_section->vma
4601 + htab->elf.hgot->root.u.def.section->output_offset
4602 + htab->elf.hgot->root.u.def.value);
4603
4604 /* Install the initial PLT entry. */
4605 bfd_put_32 (output_bfd,
4606 sparc_vxworks_exec_plt0_entry[0] + ((got_base + 8) >> 10),
4607 htab->elf.splt->contents);
4608 bfd_put_32 (output_bfd,
4609 sparc_vxworks_exec_plt0_entry[1] + ((got_base + 8) & 0x3ff),
4610 htab->elf.splt->contents + 4);
4611 bfd_put_32 (output_bfd,
4612 sparc_vxworks_exec_plt0_entry[2],
4613 htab->elf.splt->contents + 8);
4614 bfd_put_32 (output_bfd,
4615 sparc_vxworks_exec_plt0_entry[3],
4616 htab->elf.splt->contents + 12);
4617 bfd_put_32 (output_bfd,
4618 sparc_vxworks_exec_plt0_entry[4],
4619 htab->elf.splt->contents + 16);
4620
4621 loc = htab->srelplt2->contents;
4622
4623 /* Add an unloaded relocation for the initial entry's "sethi". */
4624 rela.r_offset = (htab->elf.splt->output_section->vma
4625 + htab->elf.splt->output_offset);
4626 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22);
4627 rela.r_addend = 8;
4628 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4629 loc += sizeof (Elf32_External_Rela);
4630
4631 /* Likewise the following "or". */
4632 rela.r_offset += 4;
4633 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10);
4634 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
4635 loc += sizeof (Elf32_External_Rela);
4636
4637 /* Fix up the remaining .rela.plt.unloaded relocations. They may have
4638 the wrong symbol index for _G_O_T_ or _P_L_T_ depending on the order
4639 in which symbols were output. */
4640 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
4641 {
4642 Elf_Internal_Rela rel;
4643
4644 /* The entry's initial "sethi" (against _G_O_T_). */
4645 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
4646 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_HI22);
4647 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4648 loc += sizeof (Elf32_External_Rela);
4649
4650 /* The following "or" (also against _G_O_T_). */
4651 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
4652 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_SPARC_LO10);
4653 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4654 loc += sizeof (Elf32_External_Rela);
4655
4656 /* The .got.plt entry (against _P_L_T_). */
4657 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
4658 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_SPARC_32);
4659 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4660 loc += sizeof (Elf32_External_Rela);
4661 }
4662 }
4663
4664 /* Install the first PLT entry in a VxWorks shared object. */
4665
4666 static void
sparc_vxworks_finish_shared_plt(bfd * output_bfd,struct bfd_link_info * info)4667 sparc_vxworks_finish_shared_plt (bfd *output_bfd, struct bfd_link_info *info)
4668 {
4669 struct _bfd_sparc_elf_link_hash_table *htab;
4670 unsigned int i;
4671
4672 htab = _bfd_sparc_elf_hash_table (info);
4673 BFD_ASSERT (htab != NULL);
4674
4675 for (i = 0; i < ARRAY_SIZE (sparc_vxworks_shared_plt0_entry); i++)
4676 bfd_put_32 (output_bfd, sparc_vxworks_shared_plt0_entry[i],
4677 htab->elf.splt->contents + i * 4);
4678 }
4679
4680 /* Finish up local dynamic symbol handling. We set the contents of
4681 various dynamic sections here. */
4682
4683 static int
finish_local_dynamic_symbol(void ** slot,void * inf)4684 finish_local_dynamic_symbol (void **slot, void *inf)
4685 {
4686 struct elf_link_hash_entry *h
4687 = (struct elf_link_hash_entry *) *slot;
4688 struct bfd_link_info *info
4689 = (struct bfd_link_info *) inf;
4690
4691 return _bfd_sparc_elf_finish_dynamic_symbol (info->output_bfd, info,
4692 h, NULL);
4693 }
4694
4695 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4696 here since undefined weak symbol may not be dynamic and may not be
4697 called for _bfd_sparc_elf_finish_dynamic_symbol. */
4698
4699 static bool
pie_finish_undefweak_symbol(struct bfd_hash_entry * bh,void * inf)4700 pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
4701 void *inf)
4702 {
4703 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
4704 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4705
4706 if (h->root.type != bfd_link_hash_undefweak
4707 || h->dynindx != -1)
4708 return true;
4709
4710 return _bfd_sparc_elf_finish_dynamic_symbol (info->output_bfd, info,
4711 h, NULL);
4712 }
4713
4714 bool
_bfd_sparc_elf_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)4715 _bfd_sparc_elf_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
4716 {
4717 bfd *dynobj;
4718 asection *sdyn;
4719 struct _bfd_sparc_elf_link_hash_table *htab;
4720
4721 htab = _bfd_sparc_elf_hash_table (info);
4722 BFD_ASSERT (htab != NULL);
4723 dynobj = htab->elf.dynobj;
4724
4725 /* We arranged in size_dynamic_sections to put the STT_REGISTER
4726 entries at the end of the dynlocal list, so they came at the end
4727 of the local symbols in the symtab. Except that they aren't
4728 STB_LOCAL, so we need to back up symtab->sh_info. */
4729 if (ABI_64_P (output_bfd)
4730 && elf_hash_table (info)->dynlocal)
4731 {
4732 asection *dynsymsec = bfd_get_linker_section (dynobj, ".dynsym");
4733 struct elf_link_local_dynamic_entry *e;
4734
4735 for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
4736 if (e->input_indx == -1)
4737 break;
4738 if (e)
4739 elf_section_data (dynsymsec->output_section)->this_hdr.sh_info
4740 = e->dynindx;
4741 }
4742
4743 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4744
4745 if (elf_hash_table (info)->dynamic_sections_created)
4746 {
4747 asection *splt;
4748
4749 splt = htab->elf.splt;
4750 BFD_ASSERT (splt != NULL && sdyn != NULL);
4751
4752 if (!sparc_finish_dyn (output_bfd, info, dynobj, sdyn, splt))
4753 return false;
4754
4755 /* Initialize the contents of the .plt section. */
4756 if (splt->size > 0)
4757 {
4758 if (htab->elf.target_os == is_vxworks)
4759 {
4760 if (bfd_link_pic (info))
4761 sparc_vxworks_finish_shared_plt (output_bfd, info);
4762 else
4763 sparc_vxworks_finish_exec_plt (output_bfd, info);
4764 }
4765 else
4766 {
4767 memset (splt->contents, 0, htab->plt_header_size);
4768 if (!ABI_64_P (output_bfd))
4769 bfd_put_32 (output_bfd, (bfd_vma) SPARC_NOP,
4770 splt->contents + splt->size - 4);
4771 }
4772 }
4773
4774 if (elf_section_data (splt->output_section) != NULL)
4775 elf_section_data (splt->output_section)->this_hdr.sh_entsize
4776 = ((htab->elf.target_os == is_vxworks
4777 || !ABI_64_P (output_bfd))
4778 ? 0 : htab->plt_entry_size);
4779 }
4780
4781 /* Set the first entry in the global offset table to the address of
4782 the dynamic section. */
4783 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4784 {
4785 bfd_vma val = (sdyn ?
4786 sdyn->output_section->vma + sdyn->output_offset :
4787 0);
4788
4789 SPARC_ELF_PUT_WORD (htab, output_bfd, val, htab->elf.sgot->contents);
4790 }
4791
4792 if (htab->elf.sgot)
4793 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize =
4794 SPARC_ELF_WORD_BYTES (htab);
4795
4796 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4797 htab_traverse (htab->loc_hash_table, finish_local_dynamic_symbol, info);
4798
4799 /* Fill PLT entries for undefined weak symbols in PIE. */
4800 if (bfd_link_pie (info))
4801 bfd_hash_traverse (&info->hash->table,
4802 pie_finish_undefweak_symbol,
4803 info);
4804 return true;
4805 }
4806
4807
4808 /* Set the right machine number for a SPARC ELF file. */
4809
4810 bool
_bfd_sparc_elf_object_p(bfd * abfd)4811 _bfd_sparc_elf_object_p (bfd *abfd)
4812 {
4813 obj_attribute *attrs = elf_known_obj_attributes (abfd)[OBJ_ATTR_GNU];
4814 obj_attribute *hwcaps = &attrs[Tag_GNU_Sparc_HWCAPS];
4815 obj_attribute *hwcaps2 = &attrs[Tag_GNU_Sparc_HWCAPS2];
4816
4817 unsigned int v9c_hwcaps_mask = ELF_SPARC_HWCAP_ASI_BLK_INIT;
4818 unsigned int v9d_hwcaps_mask = (ELF_SPARC_HWCAP_FMAF
4819 | ELF_SPARC_HWCAP_VIS3
4820 | ELF_SPARC_HWCAP_HPC);
4821 unsigned int v9e_hwcaps_mask = (ELF_SPARC_HWCAP_AES
4822 | ELF_SPARC_HWCAP_DES
4823 | ELF_SPARC_HWCAP_KASUMI
4824 | ELF_SPARC_HWCAP_CAMELLIA
4825 | ELF_SPARC_HWCAP_MD5
4826 | ELF_SPARC_HWCAP_SHA1
4827 | ELF_SPARC_HWCAP_SHA256
4828 | ELF_SPARC_HWCAP_SHA512
4829 | ELF_SPARC_HWCAP_MPMUL
4830 | ELF_SPARC_HWCAP_MONT
4831 | ELF_SPARC_HWCAP_CRC32C
4832 | ELF_SPARC_HWCAP_CBCOND
4833 | ELF_SPARC_HWCAP_PAUSE);
4834 unsigned int v9v_hwcaps_mask = (ELF_SPARC_HWCAP_FJFMAU
4835 | ELF_SPARC_HWCAP_IMA);
4836 unsigned int v9m_hwcaps2_mask = (ELF_SPARC_HWCAP2_SPARC5
4837 | ELF_SPARC_HWCAP2_MWAIT
4838 | ELF_SPARC_HWCAP2_XMPMUL
4839 | ELF_SPARC_HWCAP2_XMONT);
4840 unsigned int m8_hwcaps2_mask = (ELF_SPARC_HWCAP2_SPARC6
4841 | ELF_SPARC_HWCAP2_ONADDSUB
4842 | ELF_SPARC_HWCAP2_ONMUL
4843 | ELF_SPARC_HWCAP2_ONDIV
4844 | ELF_SPARC_HWCAP2_DICTUNP
4845 | ELF_SPARC_HWCAP2_FPCMPSHL
4846 | ELF_SPARC_HWCAP2_RLE
4847 | ELF_SPARC_HWCAP2_SHA3);
4848
4849 if (ABI_64_P (abfd))
4850 {
4851 unsigned long mach = bfd_mach_sparc_v9;
4852
4853 if (hwcaps2->i & m8_hwcaps2_mask)
4854 mach = bfd_mach_sparc_v9m8;
4855 else if (hwcaps2->i & v9m_hwcaps2_mask)
4856 mach = bfd_mach_sparc_v9m;
4857 else if (hwcaps->i & v9v_hwcaps_mask)
4858 mach = bfd_mach_sparc_v9v;
4859 else if (hwcaps->i & v9e_hwcaps_mask)
4860 mach = bfd_mach_sparc_v9e;
4861 else if (hwcaps->i & v9d_hwcaps_mask)
4862 mach = bfd_mach_sparc_v9d;
4863 else if (hwcaps->i & v9c_hwcaps_mask)
4864 mach = bfd_mach_sparc_v9c;
4865 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3)
4866 mach = bfd_mach_sparc_v9b;
4867 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1)
4868 mach = bfd_mach_sparc_v9a;
4869 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach);
4870 }
4871 else
4872 {
4873 if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS)
4874 {
4875 if (hwcaps2->i & m8_hwcaps2_mask)
4876 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4877 bfd_mach_sparc_v8plusm8);
4878 else if (hwcaps2->i & v9m_hwcaps2_mask)
4879 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4880 bfd_mach_sparc_v8plusm);
4881 else if (hwcaps->i & v9v_hwcaps_mask)
4882 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4883 bfd_mach_sparc_v8plusv);
4884 else if (hwcaps->i & v9e_hwcaps_mask)
4885 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4886 bfd_mach_sparc_v8pluse);
4887 else if (hwcaps->i & v9d_hwcaps_mask)
4888 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4889 bfd_mach_sparc_v8plusd);
4890 else if (hwcaps->i & v9c_hwcaps_mask)
4891 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4892 bfd_mach_sparc_v8plusc);
4893 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3)
4894 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4895 bfd_mach_sparc_v8plusb);
4896 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1)
4897 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4898 bfd_mach_sparc_v8plusa);
4899 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS)
4900 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4901 bfd_mach_sparc_v8plus);
4902 else
4903 return false;
4904 }
4905 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_LEDATA)
4906 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
4907 bfd_mach_sparc_sparclite_le);
4908 else
4909 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
4910 }
4911 }
4912
4913 /* Return address for Ith PLT stub in section PLT, for relocation REL
4914 or (bfd_vma) -1 if it should not be included. */
4915
4916 bfd_vma
_bfd_sparc_elf_plt_sym_val(bfd_vma i,const asection * plt,const arelent * rel)4917 _bfd_sparc_elf_plt_sym_val (bfd_vma i, const asection *plt, const arelent *rel)
4918 {
4919 if (ABI_64_P (plt->owner))
4920 {
4921 bfd_vma j;
4922
4923 i += PLT64_HEADER_SIZE / PLT64_ENTRY_SIZE;
4924 if (i < PLT64_LARGE_THRESHOLD)
4925 return plt->vma + i * PLT64_ENTRY_SIZE;
4926
4927 j = (i - PLT64_LARGE_THRESHOLD) % 160;
4928 i -= j;
4929 return plt->vma + i * PLT64_ENTRY_SIZE + j * 4 * 6;
4930 }
4931 else
4932 return rel->address;
4933 }
4934
4935 /* Merge backend specific data from an object file to the output
4936 object file when linking. */
4937
4938 bool
_bfd_sparc_elf_merge_private_bfd_data(bfd * ibfd,struct bfd_link_info * info)4939 _bfd_sparc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4940 {
4941 bfd *obfd = info->output_bfd;
4942 obj_attribute *in_attr, *in_attrs;
4943 obj_attribute *out_attr, *out_attrs;
4944
4945 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4946 {
4947 /* This is the first object. Copy the attributes. */
4948 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4949
4950 /* Use the Tag_null value to indicate the attributes have been
4951 initialized. */
4952 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4953
4954 return true;
4955 }
4956
4957 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4958 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4959
4960 in_attr = &in_attrs[Tag_GNU_Sparc_HWCAPS];
4961 out_attr = &out_attrs[Tag_GNU_Sparc_HWCAPS];
4962
4963 out_attr->i |= in_attr->i;
4964 out_attr->type = 1;
4965
4966 in_attr = &in_attrs[Tag_GNU_Sparc_HWCAPS2];
4967 out_attr = &out_attrs[Tag_GNU_Sparc_HWCAPS2];
4968
4969 out_attr->i |= in_attr->i;
4970 out_attr->type = 1;
4971
4972 /* Merge Tag_compatibility attributes and any common GNU ones. */
4973 _bfd_elf_merge_object_attributes (ibfd, info);
4974
4975 return true;
4976 }
4977