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file as.info-5 was initially added on branch binutils-2_10-branch.
[binutils.git] / bfd / elf32-sparc.c
blob70d65a5f87bd3510805cf4a2e5f124c3c91efbe1
1 /* SPARC-specific support for 32-bit ELF
2 Copyright (C) 1993, 94, 95, 96, 97, 98, 99, 2000
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "bfdlink.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf/sparc.h"
27 #include "opcode/sparc.h"
28
29 static reloc_howto_type *elf32_sparc_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf32_sparc_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static boolean elf32_sparc_check_relocs
34 PARAMS ((bfd *, struct bfd_link_info *, asection *,
35 const Elf_Internal_Rela *));
36 static boolean elf32_sparc_adjust_dynamic_symbol
37 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
38 static boolean elf32_sparc_size_dynamic_sections
39 PARAMS ((bfd *, struct bfd_link_info *));
40 static boolean elf32_sparc_relax_section
41 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
42 static boolean elf32_sparc_relocate_section
43 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
44 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
45 static boolean elf32_sparc_finish_dynamic_symbol
46 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
47 Elf_Internal_Sym *));
48 static boolean elf32_sparc_finish_dynamic_sections
49 PARAMS ((bfd *, struct bfd_link_info *));
50 static boolean elf32_sparc_merge_private_bfd_data PARAMS ((bfd *, bfd *));
51 static boolean elf32_sparc_object_p
52 PARAMS ((bfd *));
53 static void elf32_sparc_final_write_processing
54 PARAMS ((bfd *, boolean));
55 \f
56 /* The relocation "howto" table. */
57
58 static bfd_reloc_status_type sparc_elf_notsupported_reloc
59 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
60 static bfd_reloc_status_type sparc_elf_wdisp16_reloc
61 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
62
63 reloc_howto_type _bfd_sparc_elf_howto_table[] =
64 {
65 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
66 HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true),
67 HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true),
68 HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true),
69 HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true),
70 HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true),
71 HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0x00ffffff,true),
72 HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true),
73 HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true),
74 HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true),
75 HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true),
76 HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true),
77 HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true),
78 HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true),
79 HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true),
80 HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true),
81 HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true),
82 HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true),
83 HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true),
84 HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true),
85 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),
86 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),
87 HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true),
88 HOWTO(R_SPARC_UA32, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0x00000000,true),
89 HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PLT32", false,0,0x00000000,true),
90 HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true),
91 HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true),
92 HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true),
93 HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true),
94 HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true),
95 HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true),
96 HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true),
97 /* These are for sparc64 in a 64 bit environment.
98 Values need to be here because the table is indexed by reloc number. */
99 HOWTO(R_SPARC_64, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_64", false,0,0x00000000,true),
100 HOWTO(R_SPARC_OLO10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_OLO10", false,0,0x00000000,true),
101 HOWTO(R_SPARC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HH22", false,0,0x00000000,true),
102 HOWTO(R_SPARC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HM10", false,0,0x00000000,true),
103 HOWTO(R_SPARC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LM22", false,0,0x00000000,true),
104 HOWTO(R_SPARC_PC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HH22", false,0,0x00000000,true),
105 HOWTO(R_SPARC_PC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HM10", false,0,0x00000000,true),
106 HOWTO(R_SPARC_PC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_LM22", false,0,0x00000000,true),
107 /* End sparc64 in 64 bit environment values.
108 The following are for sparc64 in a 32 bit environment. */
109 HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true),
110 HOWTO(R_SPARC_WDISP19, 2,2,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true),
111 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),
112 HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true),
113 HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true),
114 HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true),
115 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
116 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
117 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
118 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
119 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
120 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
121 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
122 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
123 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
124 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
125 HOWTO(R_SPARC_REV32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_REV32", false,0,0xffffffff,true),
126 };
127 static reloc_howto_type elf32_sparc_vtinherit_howto =
128 HOWTO (R_SPARC_GNU_VTINHERIT, 0,2,0,false,0,complain_overflow_dont, NULL, "R_SPARC_GNU_VTINHERIT", false,0, 0, false);
129 static reloc_howto_type elf32_sparc_vtentry_howto =
130 HOWTO (R_SPARC_GNU_VTENTRY, 0,2,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_SPARC_GNU_VTENTRY", false,0,0, false);
131
132
133 struct elf_reloc_map {
134 bfd_reloc_code_real_type bfd_reloc_val;
135 unsigned char elf_reloc_val;
136 };
137
138 static CONST struct elf_reloc_map sparc_reloc_map[] =
139 {
140 { BFD_RELOC_NONE, R_SPARC_NONE, },
141 { BFD_RELOC_16, R_SPARC_16, },
142 { BFD_RELOC_8, R_SPARC_8 },
143 { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
144 { BFD_RELOC_CTOR, R_SPARC_32 },
145 { BFD_RELOC_32, R_SPARC_32 },
146 { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
147 { BFD_RELOC_HI22, R_SPARC_HI22 },
148 { BFD_RELOC_LO10, R_SPARC_LO10, },
149 { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
150 { BFD_RELOC_SPARC22, R_SPARC_22 },
151 { BFD_RELOC_SPARC13, R_SPARC_13 },
152 { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
153 { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
154 { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
155 { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
156 { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
157 { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
158 { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
159 { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
160 { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
161 { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
162 { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
163 /* ??? Doesn't dwarf use this? */
164 /*{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
165 {BFD_RELOC_SPARC_10, R_SPARC_10},
166 {BFD_RELOC_SPARC_11, R_SPARC_11},
167 {BFD_RELOC_SPARC_64, R_SPARC_64},
168 {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10},
169 {BFD_RELOC_SPARC_HH22, R_SPARC_HH22},
170 {BFD_RELOC_SPARC_HM10, R_SPARC_HM10},
171 {BFD_RELOC_SPARC_LM22, R_SPARC_LM22},
172 {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22},
173 {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10},
174 {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22},
175 {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16},
176 {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19},
177 {BFD_RELOC_SPARC_7, R_SPARC_7},
178 {BFD_RELOC_SPARC_5, R_SPARC_5},
179 {BFD_RELOC_SPARC_6, R_SPARC_6},
180 {BFD_RELOC_SPARC_REV32, R_SPARC_REV32 },
181 {BFD_RELOC_VTABLE_INHERIT, R_SPARC_GNU_VTINHERIT},
182 {BFD_RELOC_VTABLE_ENTRY, R_SPARC_GNU_VTENTRY},
183 };
184
185 static reloc_howto_type *
186 elf32_sparc_reloc_type_lookup (abfd, code)
187 bfd *abfd ATTRIBUTE_UNUSED;
188 bfd_reloc_code_real_type code;
189 {
190 unsigned int i;
191
192 switch (code)
193 {
194 case BFD_RELOC_VTABLE_INHERIT:
195 return &elf32_sparc_vtinherit_howto;
196
197 case BFD_RELOC_VTABLE_ENTRY:
198 return &elf32_sparc_vtentry_howto;
199
200 default:
201 for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++)
202 {
203 if (sparc_reloc_map[i].bfd_reloc_val == code)
204 return &_bfd_sparc_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val];
205 }
206 }
207 bfd_set_error (bfd_error_bad_value);
208 return NULL;
209 }
210
211 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
212 and elf64-sparc.c has its own copy. */
213
214 static void
215 elf32_sparc_info_to_howto (abfd, cache_ptr, dst)
216 bfd *abfd ATTRIBUTE_UNUSED;
217 arelent *cache_ptr;
218 Elf_Internal_Rela *dst;
219 {
220 switch (ELF32_R_TYPE(dst->r_info))
221 {
222 case R_SPARC_GNU_VTINHERIT:
223 cache_ptr->howto = &elf32_sparc_vtinherit_howto;
224 break;
225
226 case R_SPARC_GNU_VTENTRY:
227 cache_ptr->howto = &elf32_sparc_vtentry_howto;
228 break;
229
230 default:
231 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_SPARC_max_std);
232 cache_ptr->howto = &_bfd_sparc_elf_howto_table[ELF32_R_TYPE(dst->r_info)];
233 }
234 }
235 \f
236 /* For unsupported relocs. */
237
238 static bfd_reloc_status_type
239 sparc_elf_notsupported_reloc (abfd,
240 reloc_entry,
241 symbol,
242 data,
243 input_section,
244 output_bfd,
245 error_message)
246 bfd *abfd ATTRIBUTE_UNUSED;
247 arelent *reloc_entry ATTRIBUTE_UNUSED;
248 asymbol *symbol ATTRIBUTE_UNUSED;
249 PTR data ATTRIBUTE_UNUSED;
250 asection *input_section ATTRIBUTE_UNUSED;
251 bfd *output_bfd ATTRIBUTE_UNUSED;
252 char **error_message ATTRIBUTE_UNUSED;
253 {
254 return bfd_reloc_notsupported;
255 }
256
257 /* Handle the WDISP16 reloc. */
258
259 static bfd_reloc_status_type
260 sparc_elf_wdisp16_reloc (abfd,
261 reloc_entry,
262 symbol,
263 data,
264 input_section,
265 output_bfd,
266 error_message)
267 bfd *abfd;
268 arelent *reloc_entry;
269 asymbol *symbol;
270 PTR data;
271 asection *input_section;
272 bfd *output_bfd;
273 char **error_message ATTRIBUTE_UNUSED;
274 {
275 bfd_vma relocation;
276 bfd_vma x;
277
278 if (output_bfd != (bfd *) NULL
279 && (symbol->flags & BSF_SECTION_SYM) == 0
280 && (! reloc_entry->howto->partial_inplace
281 || reloc_entry->addend == 0))
282 {
283 reloc_entry->address += input_section->output_offset;
284 return bfd_reloc_ok;
285 }
286
287 if (output_bfd != NULL)
288 return bfd_reloc_continue;
289
290 if (reloc_entry->address > input_section->_cooked_size)
291 return bfd_reloc_outofrange;
292
293 relocation = (symbol->value
294 + symbol->section->output_section->vma
295 + symbol->section->output_offset);
296 relocation += reloc_entry->addend;
297 relocation -= (input_section->output_section->vma
298 + input_section->output_offset);
299 relocation -= reloc_entry->address;
300
301 x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
302 x |= ((((relocation >> 2) & 0xc000) << 6)
303 | ((relocation >> 2) & 0x3fff));
304 bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address);
305
306 if ((bfd_signed_vma) relocation < - 0x40000
307 || (bfd_signed_vma) relocation > 0x3ffff)
308 return bfd_reloc_overflow;
309 else
310 return bfd_reloc_ok;
311 }
312 \f
313 /* Functions for the SPARC ELF linker. */
314
315 /* The name of the dynamic interpreter. This is put in the .interp
316 section. */
317
318 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
319
320 /* The nop opcode we use. */
321
322 #define SPARC_NOP 0x01000000
323
324 /* The size in bytes of an entry in the procedure linkage table. */
325
326 #define PLT_ENTRY_SIZE 12
327
328 /* The first four entries in a procedure linkage table are reserved,
329 and the initial contents are unimportant (we zero them out).
330 Subsequent entries look like this. See the SVR4 ABI SPARC
331 supplement to see how this works. */
332
333 /* sethi %hi(.-.plt0),%g1. We fill in the address later. */
334 #define PLT_ENTRY_WORD0 0x03000000
335 /* b,a .plt0. We fill in the offset later. */
336 #define PLT_ENTRY_WORD1 0x30800000
337 /* nop. */
338 #define PLT_ENTRY_WORD2 SPARC_NOP
339
340 /* Look through the relocs for a section during the first phase, and
341 allocate space in the global offset table or procedure linkage
342 table. */
343
344 static boolean
345 elf32_sparc_check_relocs (abfd, info, sec, relocs)
346 bfd *abfd;
347 struct bfd_link_info *info;
348 asection *sec;
349 const Elf_Internal_Rela *relocs;
350 {
351 bfd *dynobj;
352 Elf_Internal_Shdr *symtab_hdr;
353 struct elf_link_hash_entry **sym_hashes;
354 bfd_vma *local_got_offsets;
355 const Elf_Internal_Rela *rel;
356 const Elf_Internal_Rela *rel_end;
357 asection *sgot;
358 asection *srelgot;
359 asection *sreloc;
360
361 if (info->relocateable)
362 return true;
363
364 dynobj = elf_hash_table (info)->dynobj;
365 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
366 sym_hashes = elf_sym_hashes (abfd);
367 local_got_offsets = elf_local_got_offsets (abfd);
368
369 sgot = NULL;
370 srelgot = NULL;
371 sreloc = NULL;
372
373 rel_end = relocs + sec->reloc_count;
374 for (rel = relocs; rel < rel_end; rel++)
375 {
376 unsigned long r_symndx;
377 struct elf_link_hash_entry *h;
378
379 r_symndx = ELF32_R_SYM (rel->r_info);
380 if (r_symndx < symtab_hdr->sh_info)
381 h = NULL;
382 else
383 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
384
385 switch (ELF32_R_TYPE (rel->r_info))
386 {
387 case R_SPARC_GOT10:
388 case R_SPARC_GOT13:
389 case R_SPARC_GOT22:
390 /* This symbol requires a global offset table entry. */
391
392 if (dynobj == NULL)
393 {
394 /* Create the .got section. */
395 elf_hash_table (info)->dynobj = dynobj = abfd;
396 if (! _bfd_elf_create_got_section (dynobj, info))
397 return false;
398 }
399
400 if (sgot == NULL)
401 {
402 sgot = bfd_get_section_by_name (dynobj, ".got");
403 BFD_ASSERT (sgot != NULL);
404 }
405
406 if (srelgot == NULL
407 && (h != NULL || info->shared))
408 {
409 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
410 if (srelgot == NULL)
411 {
412 srelgot = bfd_make_section (dynobj, ".rela.got");
413 if (srelgot == NULL
414 || ! bfd_set_section_flags (dynobj, srelgot,
415 (SEC_ALLOC
416 | SEC_LOAD
417 | SEC_HAS_CONTENTS
418 | SEC_IN_MEMORY
419 | SEC_LINKER_CREATED
420 | SEC_READONLY))
421 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
422 return false;
423 }
424 }
425
426 if (h != NULL)
427 {
428 if (h->got.offset != (bfd_vma) -1)
429 {
430 /* We have already allocated space in the .got. */
431 break;
432 }
433 h->got.offset = sgot->_raw_size;
434
435 /* Make sure this symbol is output as a dynamic symbol. */
436 if (h->dynindx == -1)
437 {
438 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
439 return false;
440 }
441
442 srelgot->_raw_size += sizeof (Elf32_External_Rela);
443 }
444 else
445 {
446 /* This is a global offset table entry for a local
447 symbol. */
448 if (local_got_offsets == NULL)
449 {
450 size_t size;
451 register unsigned int i;
452
453 size = symtab_hdr->sh_info * sizeof (bfd_vma);
454 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
455 if (local_got_offsets == NULL)
456 return false;
457 elf_local_got_offsets (abfd) = local_got_offsets;
458 for (i = 0; i < symtab_hdr->sh_info; i++)
459 local_got_offsets[i] = (bfd_vma) -1;
460 }
461 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
462 {
463 /* We have already allocated space in the .got. */
464 break;
465 }
466 local_got_offsets[r_symndx] = sgot->_raw_size;
467
468 if (info->shared)
469 {
470 /* If we are generating a shared object, we need to
471 output a R_SPARC_RELATIVE reloc so that the
472 dynamic linker can adjust this GOT entry. */
473 srelgot->_raw_size += sizeof (Elf32_External_Rela);
474 }
475 }
476
477 sgot->_raw_size += 4;
478
479 /* If the .got section is more than 0x1000 bytes, we add
480 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13
481 bit relocations have a greater chance of working. */
482 if (sgot->_raw_size >= 0x1000
483 && elf_hash_table (info)->hgot->root.u.def.value == 0)
484 elf_hash_table (info)->hgot->root.u.def.value = 0x1000;
485
486 break;
487
488 case R_SPARC_WPLT30:
489 /* This symbol requires a procedure linkage table entry. We
490 actually build the entry in adjust_dynamic_symbol,
491 because this might be a case of linking PIC code without
492 linking in any dynamic objects, in which case we don't
493 need to generate a procedure linkage table after all. */
494
495 if (h == NULL)
496 {
497 /* The Solaris native assembler will generate a WPLT30
498 reloc for a local symbol if you assemble a call from
499 one section to another when using -K pic. We treat
500 it as WDISP30. */
501 break;
502 }
503
504 /* Make sure this symbol is output as a dynamic symbol. */
505 if (h->dynindx == -1)
506 {
507 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
508 return false;
509 }
510
511 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
512
513 break;
514
515 case R_SPARC_PC10:
516 case R_SPARC_PC22:
517 if (h != NULL)
518 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
519
520 if (h != NULL
521 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
522 break;
523 /* Fall through. */
524 case R_SPARC_DISP8:
525 case R_SPARC_DISP16:
526 case R_SPARC_DISP32:
527 case R_SPARC_WDISP30:
528 case R_SPARC_WDISP22:
529 case R_SPARC_WDISP19:
530 case R_SPARC_WDISP16:
531 if (h != NULL)
532 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
533
534 /* If we are linking with -Bsymbolic, we do not need to copy
535 a PC relative reloc against a global symbol which is
536 defined in an object we are including in the link (i.e.,
537 DEF_REGULAR is set). FIXME: At this point we have not
538 seen all the input files, so it is possible that
539 DEF_REGULAR is not set now but will be set later (it is
540 never cleared). This needs to be handled as in
541 elf32-i386.c. */
542 if (h == NULL
543 || (info->symbolic
544 && (h->elf_link_hash_flags
545 & ELF_LINK_HASH_DEF_REGULAR) != 0))
546 break;
547 /* Fall through. */
548 case R_SPARC_8:
549 case R_SPARC_16:
550 case R_SPARC_32:
551 case R_SPARC_HI22:
552 case R_SPARC_22:
553 case R_SPARC_13:
554 case R_SPARC_LO10:
555 case R_SPARC_UA32:
556 if (h != NULL)
557 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
558
559 if (info->shared)
560 {
561 /* When creating a shared object, we must copy these
562 relocs into the output file. We create a reloc
563 section in dynobj and make room for the reloc. */
564 if (sreloc == NULL)
565 {
566 const char *name;
567
568 name = (bfd_elf_string_from_elf_section
569 (abfd,
570 elf_elfheader (abfd)->e_shstrndx,
571 elf_section_data (sec)->rel_hdr.sh_name));
572 if (name == NULL)
573 return false;
574
575 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
576 && strcmp (bfd_get_section_name (abfd, sec),
577 name + 5) == 0);
578
579 sreloc = bfd_get_section_by_name (dynobj, name);
580 if (sreloc == NULL)
581 {
582 flagword flags;
583
584 sreloc = bfd_make_section (dynobj, name);
585 flags = (SEC_HAS_CONTENTS | SEC_READONLY
586 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
587 if ((sec->flags & SEC_ALLOC) != 0)
588 flags |= SEC_ALLOC | SEC_LOAD;
589 if (sreloc == NULL
590 || ! bfd_set_section_flags (dynobj, sreloc, flags)
591 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
592 return false;
593 }
594 }
595
596 sreloc->_raw_size += sizeof (Elf32_External_Rela);
597 }
598
599 break;
600
601 case R_SPARC_GNU_VTINHERIT:
602 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
603 return false;
604 break;
605
606 case R_SPARC_GNU_VTENTRY:
607 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
608 return false;
609 break;
610
611 default:
612 break;
613 }
614 }
615
616 return true;
617 }
618
619 static asection *
620 elf32_sparc_gc_mark_hook (abfd, info, rel, h, sym)
621 bfd *abfd;
622 struct bfd_link_info *info ATTRIBUTE_UNUSED;
623 Elf_Internal_Rela *rel;
624 struct elf_link_hash_entry *h;
625 Elf_Internal_Sym *sym;
626 {
627
628 if (h != NULL)
629 {
630 switch (ELF32_R_TYPE (rel->r_info))
631 {
632 case R_SPARC_GNU_VTINHERIT:
633 case R_SPARC_GNU_VTENTRY:
634 break;
635
636 default:
637 switch (h->root.type)
638 {
639 case bfd_link_hash_defined:
640 case bfd_link_hash_defweak:
641 return h->root.u.def.section;
642
643 case bfd_link_hash_common:
644 return h->root.u.c.p->section;
645
646 default:
647 break;
648 }
649 }
650 }
651 else
652 {
653 if (!(elf_bad_symtab (abfd)
654 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
655 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
656 && sym->st_shndx != SHN_COMMON))
657 {
658 return bfd_section_from_elf_index (abfd, sym->st_shndx);
659 }
660 }
661
662 return NULL;
663 }
664
665 /* Update the got entry reference counts for the section being removed. */
666 static boolean
667 elf32_sparc_gc_sweep_hook (abfd, info, sec, relocs)
668 bfd *abfd;
669 struct bfd_link_info *info ATTRIBUTE_UNUSED;
670 asection *sec;
671 const Elf_Internal_Rela *relocs;
672 {
673
674 Elf_Internal_Shdr *symtab_hdr;
675 struct elf_link_hash_entry **sym_hashes;
676 bfd_signed_vma *local_got_refcounts;
677 const Elf_Internal_Rela *rel, *relend;
678 unsigned long r_symndx;
679 struct elf_link_hash_entry *h;
680
681 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
682 sym_hashes = elf_sym_hashes (abfd);
683 local_got_refcounts = elf_local_got_refcounts (abfd);
684
685 relend = relocs + sec->reloc_count;
686 for (rel = relocs; rel < relend; rel++)
687 switch (ELF32_R_TYPE (rel->r_info))
688 {
689 case R_SPARC_GOT10:
690 case R_SPARC_GOT13:
691 case R_SPARC_GOT22:
692 r_symndx = ELF32_R_SYM (rel->r_info);
693 if (r_symndx >= symtab_hdr->sh_info)
694 {
695 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
696 if (h->got.refcount > 0)
697 h->got.refcount--;
698 }
699 else
700 {
701 if (local_got_refcounts[r_symndx] > 0)
702 local_got_refcounts[r_symndx]--;
703 }
704 break;
705
706 case R_SPARC_PLT32:
707 case R_SPARC_HIPLT22:
708 case R_SPARC_LOPLT10:
709 case R_SPARC_PCPLT32:
710 case R_SPARC_PCPLT10:
711 r_symndx = ELF32_R_SYM (rel->r_info);
712 if (r_symndx >= symtab_hdr->sh_info)
713 {
714 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
715 if (h->plt.refcount > 0)
716 h->plt.refcount--;
717 }
718 break;
719
720 default:
721 break;
722 }
723
724 return true;
725 }
726
727 /* Adjust a symbol defined by a dynamic object and referenced by a
728 regular object. The current definition is in some section of the
729 dynamic object, but we're not including those sections. We have to
730 change the definition to something the rest of the link can
731 understand. */
732
733 static boolean
734 elf32_sparc_adjust_dynamic_symbol (info, h)
735 struct bfd_link_info *info;
736 struct elf_link_hash_entry *h;
737 {
738 bfd *dynobj;
739 asection *s;
740 unsigned int power_of_two;
741
742 dynobj = elf_hash_table (info)->dynobj;
743
744 /* Make sure we know what is going on here. */
745 BFD_ASSERT (dynobj != NULL
746 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
747 || h->weakdef != NULL
748 || ((h->elf_link_hash_flags
749 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
750 && (h->elf_link_hash_flags
751 & ELF_LINK_HASH_REF_REGULAR) != 0
752 && (h->elf_link_hash_flags
753 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
754
755 /* If this is a function, put it in the procedure linkage table. We
756 will fill in the contents of the procedure linkage table later
757 (although we could actually do it here). The STT_NOTYPE
758 condition is a hack specifically for the Oracle libraries
759 delivered for Solaris; for some inexplicable reason, they define
760 some of their functions as STT_NOTYPE when they really should be
761 STT_FUNC. */
762 if (h->type == STT_FUNC
763 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
764 || (h->type == STT_NOTYPE
765 && (h->root.type == bfd_link_hash_defined
766 || h->root.type == bfd_link_hash_defweak)
767 && (h->root.u.def.section->flags & SEC_CODE) != 0))
768 {
769 if (! elf_hash_table (info)->dynamic_sections_created
770 || ((!info->shared || info->symbolic || h->dynindx == -1)
771 && (h->elf_link_hash_flags
772 & ELF_LINK_HASH_DEF_REGULAR) != 0))
773 {
774 /* This case can occur if we saw a WPLT30 reloc in an input
775 file, but none of the input files were dynamic objects.
776 Or, when linking the main application or a -Bsymbolic
777 shared library against PIC code. Or when a global symbol
778 has been made private, e.g. via versioning.
779
780 In these cases we know what value the symbol will resolve
781 to, so we don't actually need to build a procedure linkage
782 table, and we can just do a WDISP30 reloc instead. */
783
784 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
785 return true;
786 }
787
788 s = bfd_get_section_by_name (dynobj, ".plt");
789 BFD_ASSERT (s != NULL);
790
791 /* The first four entries in .plt are reserved. */
792 if (s->_raw_size == 0)
793 s->_raw_size = 4 * PLT_ENTRY_SIZE;
794
795 /* The procedure linkage table has a maximum size. */
796 if (s->_raw_size >= 0x400000)
797 {
798 bfd_set_error (bfd_error_bad_value);
799 return false;
800 }
801
802 /* If this symbol is not defined in a regular file, and we are
803 not generating a shared library, then set the symbol to this
804 location in the .plt. This is required to make function
805 pointers compare as equal between the normal executable and
806 the shared library. */
807 if (! info->shared
808 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
809 {
810 h->root.u.def.section = s;
811 h->root.u.def.value = s->_raw_size;
812 }
813
814 h->plt.offset = s->_raw_size;
815
816 /* Make room for this entry. */
817 s->_raw_size += PLT_ENTRY_SIZE;
818
819 /* We also need to make an entry in the .rela.plt section. */
820
821 s = bfd_get_section_by_name (dynobj, ".rela.plt");
822 BFD_ASSERT (s != NULL);
823 s->_raw_size += sizeof (Elf32_External_Rela);
824
825 return true;
826 }
827
828 /* If this is a weak symbol, and there is a real definition, the
829 processor independent code will have arranged for us to see the
830 real definition first, and we can just use the same value. */
831 if (h->weakdef != NULL)
832 {
833 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
834 || h->weakdef->root.type == bfd_link_hash_defweak);
835 h->root.u.def.section = h->weakdef->root.u.def.section;
836 h->root.u.def.value = h->weakdef->root.u.def.value;
837 return true;
838 }
839
840 /* This is a reference to a symbol defined by a dynamic object which
841 is not a function. */
842
843 /* If we are creating a shared library, we must presume that the
844 only references to the symbol are via the global offset table.
845 For such cases we need not do anything here; the relocations will
846 be handled correctly by relocate_section. */
847 if (info->shared)
848 return true;
849
850 /* If there are no references to this symbol that do not use the
851 GOT, we don't need to generate a copy reloc. */
852 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
853 return true;
854
855 /* We must allocate the symbol in our .dynbss section, which will
856 become part of the .bss section of the executable. There will be
857 an entry for this symbol in the .dynsym section. The dynamic
858 object will contain position independent code, so all references
859 from the dynamic object to this symbol will go through the global
860 offset table. The dynamic linker will use the .dynsym entry to
861 determine the address it must put in the global offset table, so
862 both the dynamic object and the regular object will refer to the
863 same memory location for the variable. */
864
865 s = bfd_get_section_by_name (dynobj, ".dynbss");
866 BFD_ASSERT (s != NULL);
867
868 /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker
869 to copy the initial value out of the dynamic object and into the
870 runtime process image. We need to remember the offset into the
871 .rel.bss section we are going to use. */
872 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
873 {
874 asection *srel;
875
876 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
877 BFD_ASSERT (srel != NULL);
878 srel->_raw_size += sizeof (Elf32_External_Rela);
879 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
880 }
881
882 /* We need to figure out the alignment required for this symbol. I
883 have no idea how ELF linkers handle this. */
884 power_of_two = bfd_log2 (h->size);
885 if (power_of_two > 3)
886 power_of_two = 3;
887
888 /* Apply the required alignment. */
889 s->_raw_size = BFD_ALIGN (s->_raw_size,
890 (bfd_size_type) (1 << power_of_two));
891 if (power_of_two > bfd_get_section_alignment (dynobj, s))
892 {
893 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
894 return false;
895 }
896
897 /* Define the symbol as being at this point in the section. */
898 h->root.u.def.section = s;
899 h->root.u.def.value = s->_raw_size;
900
901 /* Increment the section size to make room for the symbol. */
902 s->_raw_size += h->size;
903
904 return true;
905 }
906
907 /* Set the sizes of the dynamic sections. */
908
909 static boolean
910 elf32_sparc_size_dynamic_sections (output_bfd, info)
911 bfd *output_bfd;
912 struct bfd_link_info *info;
913 {
914 bfd *dynobj;
915 asection *s;
916 boolean reltext;
917 boolean relplt;
918
919 dynobj = elf_hash_table (info)->dynobj;
920 BFD_ASSERT (dynobj != NULL);
921
922 if (elf_hash_table (info)->dynamic_sections_created)
923 {
924 /* Set the contents of the .interp section to the interpreter. */
925 if (! info->shared)
926 {
927 s = bfd_get_section_by_name (dynobj, ".interp");
928 BFD_ASSERT (s != NULL);
929 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
930 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
931 }
932
933 /* Make space for the trailing nop in .plt. */
934 s = bfd_get_section_by_name (dynobj, ".plt");
935 BFD_ASSERT (s != NULL);
936 if (s->_raw_size > 0)
937 s->_raw_size += 4;
938 }
939 else
940 {
941 /* We may have created entries in the .rela.got section.
942 However, if we are not creating the dynamic sections, we will
943 not actually use these entries. Reset the size of .rela.got,
944 which will cause it to get stripped from the output file
945 below. */
946 s = bfd_get_section_by_name (dynobj, ".rela.got");
947 if (s != NULL)
948 s->_raw_size = 0;
949 }
950
951 /* The check_relocs and adjust_dynamic_symbol entry points have
952 determined the sizes of the various dynamic sections. Allocate
953 memory for them. */
954 reltext = false;
955 relplt = false;
956 for (s = dynobj->sections; s != NULL; s = s->next)
957 {
958 const char *name;
959 boolean strip;
960
961 if ((s->flags & SEC_LINKER_CREATED) == 0)
962 continue;
963
964 /* It's OK to base decisions on the section name, because none
965 of the dynobj section names depend upon the input files. */
966 name = bfd_get_section_name (dynobj, s);
967
968 strip = false;
969
970 if (strncmp (name, ".rela", 5) == 0)
971 {
972 if (s->_raw_size == 0)
973 {
974 /* If we don't need this section, strip it from the
975 output file. This is to handle .rela.bss and
976 .rel.plt. We must create it in
977 create_dynamic_sections, because it must be created
978 before the linker maps input sections to output
979 sections. The linker does that before
980 adjust_dynamic_symbol is called, and it is that
981 function which decides whether anything needs to go
982 into these sections. */
983 strip = true;
984 }
985 else
986 {
987 const char *outname;
988 asection *target;
989
990 /* If this relocation section applies to a read only
991 section, then we probably need a DT_TEXTREL entry. */
992 outname = bfd_get_section_name (output_bfd,
993 s->output_section);
994 target = bfd_get_section_by_name (output_bfd, outname + 5);
995 if (target != NULL
996 && (target->flags & SEC_READONLY) != 0
997 && (target->flags & SEC_ALLOC) != 0)
998 reltext = true;
999
1000 if (strcmp (name, ".rela.plt") == 0)
1001 relplt = true;
1002
1003 /* We use the reloc_count field as a counter if we need
1004 to copy relocs into the output file. */
1005 s->reloc_count = 0;
1006 }
1007 }
1008 else if (strcmp (name, ".plt") != 0
1009 && strcmp (name, ".got") != 0)
1010 {
1011 /* It's not one of our sections, so don't allocate space. */
1012 continue;
1013 }
1014
1015 if (strip)
1016 {
1017 _bfd_strip_section_from_output (info, s);
1018 continue;
1019 }
1020
1021 /* Allocate memory for the section contents. */
1022 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
1023 if (s->contents == NULL && s->_raw_size != 0)
1024 return false;
1025 }
1026
1027 if (elf_hash_table (info)->dynamic_sections_created)
1028 {
1029 /* Add some entries to the .dynamic section. We fill in the
1030 values later, in elf32_sparc_finish_dynamic_sections, but we
1031 must add the entries now so that we get the correct size for
1032 the .dynamic section. The DT_DEBUG entry is filled in by the
1033 dynamic linker and used by the debugger. */
1034 if (! info->shared)
1035 {
1036 if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
1037 return false;
1038 }
1039
1040 if (relplt)
1041 {
1042 if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
1043 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
1044 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
1045 || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
1046 return false;
1047 }
1048
1049 if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
1050 || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
1051 || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
1052 sizeof (Elf32_External_Rela)))
1053 return false;
1054
1055 if (reltext)
1056 {
1057 if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
1058 return false;
1059 }
1060 }
1061
1062 return true;
1063 }
1064
1065
1066 #define SET_SEC_DO_RELAX(section) do { elf_section_data(section)->tdata = (void *)1; } while (0)
1067 #define SEC_DO_RELAX(section) (elf_section_data(section)->tdata == (void *)1)
1068
1069 /*ARGSUSED*/
1070 static boolean
1071 elf32_sparc_relax_section (abfd, section, link_info, again)
1072 bfd *abfd ATTRIBUTE_UNUSED;
1073 asection *section ATTRIBUTE_UNUSED;
1074 struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
1075 boolean *again;
1076 {
1077 *again = false;
1078 SET_SEC_DO_RELAX (section);
1079 return true;
1080 }
1081
1082 /* Relocate a SPARC ELF section. */
1083
1084 static boolean
1085 elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section,
1086 contents, relocs, local_syms, local_sections)
1087 bfd *output_bfd;
1088 struct bfd_link_info *info;
1089 bfd *input_bfd;
1090 asection *input_section;
1091 bfd_byte *contents;
1092 Elf_Internal_Rela *relocs;
1093 Elf_Internal_Sym *local_syms;
1094 asection **local_sections;
1095 {
1096 bfd *dynobj;
1097 Elf_Internal_Shdr *symtab_hdr;
1098 struct elf_link_hash_entry **sym_hashes;
1099 bfd_vma *local_got_offsets;
1100 bfd_vma got_base;
1101 asection *sgot;
1102 asection *splt;
1103 asection *sreloc;
1104 Elf_Internal_Rela *rel;
1105 Elf_Internal_Rela *relend;
1106
1107 dynobj = elf_hash_table (info)->dynobj;
1108 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1109 sym_hashes = elf_sym_hashes (input_bfd);
1110 local_got_offsets = elf_local_got_offsets (input_bfd);
1111
1112 if (elf_hash_table (info)->hgot == NULL)
1113 got_base = 0;
1114 else
1115 got_base = elf_hash_table (info)->hgot->root.u.def.value;
1116
1117 sgot = NULL;
1118 splt = NULL;
1119 sreloc = NULL;
1120
1121 rel = relocs;
1122 relend = relocs + input_section->reloc_count;
1123 for (; rel < relend; rel++)
1124 {
1125 int r_type;
1126 reloc_howto_type *howto;
1127 unsigned long r_symndx;
1128 struct elf_link_hash_entry *h;
1129 Elf_Internal_Sym *sym;
1130 asection *sec;
1131 bfd_vma relocation;
1132 bfd_reloc_status_type r;
1133
1134 r_type = ELF32_R_TYPE (rel->r_info);
1135
1136 if (r_type == R_SPARC_GNU_VTINHERIT
1137 || r_type == R_SPARC_GNU_VTENTRY)
1138 continue;
1139
1140 if (r_type < 0 || r_type >= (int) R_SPARC_max_std)
1141 {
1142 bfd_set_error (bfd_error_bad_value);
1143 return false;
1144 }
1145 howto = _bfd_sparc_elf_howto_table + r_type;
1146
1147 r_symndx = ELF32_R_SYM (rel->r_info);
1148
1149 if (info->relocateable)
1150 {
1151 /* This is a relocateable link. We don't have to change
1152 anything, unless the reloc is against a section symbol,
1153 in which case we have to adjust according to where the
1154 section symbol winds up in the output section. */
1155 if (r_symndx < symtab_hdr->sh_info)
1156 {
1157 sym = local_syms + r_symndx;
1158 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1159 {
1160 sec = local_sections[r_symndx];
1161 rel->r_addend += sec->output_offset + sym->st_value;
1162 }
1163 }
1164
1165 continue;
1166 }
1167
1168 /* This is a final link. */
1169 h = NULL;
1170 sym = NULL;
1171 sec = NULL;
1172 if (r_symndx < symtab_hdr->sh_info)
1173 {
1174 sym = local_syms + r_symndx;
1175 sec = local_sections[r_symndx];
1176 relocation = (sec->output_section->vma
1177 + sec->output_offset
1178 + sym->st_value);
1179 }
1180 else
1181 {
1182 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1183 while (h->root.type == bfd_link_hash_indirect
1184 || h->root.type == bfd_link_hash_warning)
1185 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1186 if (h->root.type == bfd_link_hash_defined
1187 || h->root.type == bfd_link_hash_defweak)
1188 {
1189 sec = h->root.u.def.section;
1190 if ((r_type == R_SPARC_WPLT30
1191 && h->plt.offset != (bfd_vma) -1)
1192 || ((r_type == R_SPARC_GOT10
1193 || r_type == R_SPARC_GOT13
1194 || r_type == R_SPARC_GOT22)
1195 && elf_hash_table (info)->dynamic_sections_created
1196 && (! info->shared
1197 || (! info->symbolic && h->dynindx != -1)
1198 || (h->elf_link_hash_flags
1199 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1200 || (info->shared
1201 && ((! info->symbolic && h->dynindx != -1)
1202 || (h->elf_link_hash_flags
1203 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1204 && (r_type == R_SPARC_8
1205 || r_type == R_SPARC_16
1206 || r_type == R_SPARC_32
1207 || r_type == R_SPARC_DISP8
1208 || r_type == R_SPARC_DISP16
1209 || r_type == R_SPARC_DISP32
1210 || r_type == R_SPARC_WDISP30
1211 || r_type == R_SPARC_WDISP22
1212 || r_type == R_SPARC_WDISP19
1213 || r_type == R_SPARC_WDISP16
1214 || r_type == R_SPARC_HI22
1215 || r_type == R_SPARC_22
1216 || r_type == R_SPARC_13
1217 || r_type == R_SPARC_LO10
1218 || r_type == R_SPARC_UA32
1219 || ((r_type == R_SPARC_PC10
1220 || r_type == R_SPARC_PC22)
1221 && strcmp (h->root.root.string,
1222 "_GLOBAL_OFFSET_TABLE_") != 0))))
1223 {
1224 /* In these cases, we don't need the relocation
1225 value. We check specially because in some
1226 obscure cases sec->output_section will be NULL. */
1227 relocation = 0;
1228 }
1229 else
1230 relocation = (h->root.u.def.value
1231 + sec->output_section->vma
1232 + sec->output_offset);
1233 }
1234 else if (h->root.type == bfd_link_hash_undefweak)
1235 relocation = 0;
1236 else if (info->shared && !info->symbolic
1237 && !info->no_undefined
1238 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1239 relocation = 0;
1240 else
1241 {
1242 if (! ((*info->callbacks->undefined_symbol)
1243 (info, h->root.root.string, input_bfd,
1244 input_section, rel->r_offset,
1245 (!info->shared || info->no_undefined
1246 || ELF_ST_VISIBILITY (h->other)))))
1247 return false;
1248 relocation = 0;
1249 }
1250 }
1251
1252 switch (r_type)
1253 {
1254 case R_SPARC_GOT10:
1255 case R_SPARC_GOT13:
1256 case R_SPARC_GOT22:
1257 /* Relocation is to the entry for this symbol in the global
1258 offset table. */
1259 if (sgot == NULL)
1260 {
1261 sgot = bfd_get_section_by_name (dynobj, ".got");
1262 BFD_ASSERT (sgot != NULL);
1263 }
1264
1265 if (h != NULL)
1266 {
1267 bfd_vma off;
1268
1269 off = h->got.offset;
1270 BFD_ASSERT (off != (bfd_vma) -1);
1271
1272 if (! elf_hash_table (info)->dynamic_sections_created
1273 || (info->shared
1274 && (info->symbolic || h->dynindx == -1)
1275 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1276 {
1277 /* This is actually a static link, or it is a
1278 -Bsymbolic link and the symbol is defined
1279 locally, or the symbol was forced to be local
1280 because of a version file. We must initialize
1281 this entry in the global offset table. Since the
1282 offset must always be a multiple of 4, we use the
1283 least significant bit to record whether we have
1284 initialized it already.
1285
1286 When doing a dynamic link, we create a .rela.got
1287 relocation entry to initialize the value. This
1288 is done in the finish_dynamic_symbol routine. */
1289 if ((off & 1) != 0)
1290 off &= ~1;
1291 else
1292 {
1293 bfd_put_32 (output_bfd, relocation,
1294 sgot->contents + off);
1295 h->got.offset |= 1;
1296 }
1297 }
1298
1299 relocation = sgot->output_offset + off - got_base;
1300 }
1301 else
1302 {
1303 bfd_vma off;
1304
1305 BFD_ASSERT (local_got_offsets != NULL
1306 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1307
1308 off = local_got_offsets[r_symndx];
1309
1310 /* The offset must always be a multiple of 4. We use
1311 the least significant bit to record whether we have
1312 already processed this entry. */
1313 if ((off & 1) != 0)
1314 off &= ~1;
1315 else
1316 {
1317 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1318
1319 if (info->shared)
1320 {
1321 asection *srelgot;
1322 Elf_Internal_Rela outrel;
1323
1324 /* We need to generate a R_SPARC_RELATIVE reloc
1325 for the dynamic linker. */
1326 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1327 BFD_ASSERT (srelgot != NULL);
1328
1329 outrel.r_offset = (sgot->output_section->vma
1330 + sgot->output_offset
1331 + off);
1332 outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
1333 outrel.r_addend = 0;
1334 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1335 (((Elf32_External_Rela *)
1336 srelgot->contents)
1337 + srelgot->reloc_count));
1338 ++srelgot->reloc_count;
1339 }
1340
1341 local_got_offsets[r_symndx] |= 1;
1342 }
1343
1344 relocation = sgot->output_offset + off - got_base;
1345 }
1346
1347 break;
1348
1349 case R_SPARC_WPLT30:
1350 /* Relocation is to the entry for this symbol in the
1351 procedure linkage table. */
1352
1353 /* The Solaris native assembler will generate a WPLT30 reloc
1354 for a local symbol if you assemble a call from one
1355 section to another when using -K pic. We treat it as
1356 WDISP30. */
1357 if (h == NULL)
1358 break;
1359
1360 if (h->plt.offset == (bfd_vma) -1)
1361 {
1362 /* We didn't make a PLT entry for this symbol. This
1363 happens when statically linking PIC code, or when
1364 using -Bsymbolic. */
1365 break;
1366 }
1367
1368 if (splt == NULL)
1369 {
1370 splt = bfd_get_section_by_name (dynobj, ".plt");
1371 BFD_ASSERT (splt != NULL);
1372 }
1373
1374 relocation = (splt->output_section->vma
1375 + splt->output_offset
1376 + h->plt.offset);
1377 break;
1378
1379 case R_SPARC_PC10:
1380 case R_SPARC_PC22:
1381 if (h != NULL
1382 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1383 break;
1384 /* Fall through. */
1385 case R_SPARC_DISP8:
1386 case R_SPARC_DISP16:
1387 case R_SPARC_DISP32:
1388 case R_SPARC_WDISP30:
1389 case R_SPARC_WDISP22:
1390 case R_SPARC_WDISP19:
1391 case R_SPARC_WDISP16:
1392 if (h == NULL
1393 || (info->symbolic
1394 && (h->elf_link_hash_flags
1395 & ELF_LINK_HASH_DEF_REGULAR) != 0))
1396 break;
1397 /* Fall through. */
1398 case R_SPARC_8:
1399 case R_SPARC_16:
1400 case R_SPARC_32:
1401 case R_SPARC_HI22:
1402 case R_SPARC_22:
1403 case R_SPARC_13:
1404 case R_SPARC_LO10:
1405 case R_SPARC_UA32:
1406 if (info->shared)
1407 {
1408 Elf_Internal_Rela outrel;
1409 boolean skip;
1410
1411 /* When generating a shared object, these relocations
1412 are copied into the output file to be resolved at run
1413 time. */
1414
1415 if (sreloc == NULL)
1416 {
1417 const char *name;
1418
1419 name = (bfd_elf_string_from_elf_section
1420 (input_bfd,
1421 elf_elfheader (input_bfd)->e_shstrndx,
1422 elf_section_data (input_section)->rel_hdr.sh_name));
1423 if (name == NULL)
1424 return false;
1425
1426 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1427 && strcmp (bfd_get_section_name (input_bfd,
1428 input_section),
1429 name + 5) == 0);
1430
1431 sreloc = bfd_get_section_by_name (dynobj, name);
1432 BFD_ASSERT (sreloc != NULL);
1433 }
1434
1435 skip = false;
1436
1437 if (elf_section_data (input_section)->stab_info == NULL)
1438 outrel.r_offset = rel->r_offset;
1439 else
1440 {
1441 bfd_vma off;
1442
1443 off = (_bfd_stab_section_offset
1444 (output_bfd, &elf_hash_table (info)->stab_info,
1445 input_section,
1446 &elf_section_data (input_section)->stab_info,
1447 rel->r_offset));
1448 if (off == (bfd_vma) -1)
1449 skip = true;
1450 outrel.r_offset = off;
1451 }
1452
1453 outrel.r_offset += (input_section->output_section->vma
1454 + input_section->output_offset);
1455
1456 if (skip)
1457 memset (&outrel, 0, sizeof outrel);
1458 /* h->dynindx may be -1 if the symbol was marked to
1459 become local. */
1460 else if (h != NULL
1461 && ((! info->symbolic && h->dynindx != -1)
1462 || (h->elf_link_hash_flags
1463 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1464 {
1465 BFD_ASSERT (h->dynindx != -1);
1466 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1467 outrel.r_addend = rel->r_addend;
1468 }
1469 else
1470 {
1471 if (r_type == R_SPARC_32)
1472 {
1473 outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
1474 outrel.r_addend = relocation + rel->r_addend;
1475 }
1476 else
1477 {
1478 long indx;
1479
1480 if (h == NULL)
1481 sec = local_sections[r_symndx];
1482 else
1483 {
1484 BFD_ASSERT (h->root.type == bfd_link_hash_defined
1485 || (h->root.type
1486 == bfd_link_hash_defweak));
1487 sec = h->root.u.def.section;
1488 }
1489 if (sec != NULL && bfd_is_abs_section (sec))
1490 indx = 0;
1491 else if (sec == NULL || sec->owner == NULL)
1492 {
1493 bfd_set_error (bfd_error_bad_value);
1494 return false;
1495 }
1496 else
1497 {
1498 asection *osec;
1499
1500 osec = sec->output_section;
1501 indx = elf_section_data (osec)->dynindx;
1502
1503 /* FIXME: we really should be able to link non-pic
1504 shared libraries. */
1505 if (indx == 0)
1506 {
1507 BFD_FAIL ();
1508 (*_bfd_error_handler)
1509 (_("%s: probably compiled without -fPIC?"),
1510 bfd_get_filename (input_bfd));
1511 bfd_set_error (bfd_error_bad_value);
1512 return false;
1513 }
1514 }
1515
1516 outrel.r_info = ELF32_R_INFO (indx, r_type);
1517 outrel.r_addend = relocation + rel->r_addend;
1518 }
1519 }
1520
1521 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1522 (((Elf32_External_Rela *)
1523 sreloc->contents)
1524 + sreloc->reloc_count));
1525 ++sreloc->reloc_count;
1526
1527 /* This reloc will be computed at runtime, so there's no
1528 need to do anything now, unless this is a RELATIVE
1529 reloc in an unallocated section. */
1530 if (skip
1531 || (input_section->flags & SEC_ALLOC) != 0
1532 || ELF32_R_TYPE (outrel.r_info) != R_SPARC_RELATIVE)
1533 continue;
1534 }
1535 break;
1536
1537 default:
1538 break;
1539 }
1540
1541 r = bfd_reloc_continue;
1542 if (r_type == R_SPARC_WDISP16)
1543 {
1544 bfd_vma x;
1545
1546 relocation += rel->r_addend;
1547 relocation -= (input_section->output_section->vma
1548 + input_section->output_offset);
1549 relocation -= rel->r_offset;
1550
1551 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
1552 x |= ((((relocation >> 2) & 0xc000) << 6)
1553 | ((relocation >> 2) & 0x3fff));
1554 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
1555
1556 if ((bfd_signed_vma) relocation < - 0x40000
1557 || (bfd_signed_vma) relocation > 0x3ffff)
1558 r = bfd_reloc_overflow;
1559 else
1560 r = bfd_reloc_ok;
1561 }
1562 else if (r_type == R_SPARC_REV32)
1563 {
1564 bfd_vma x;
1565
1566 relocation = relocation + rel->r_addend;
1567
1568 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
1569 x = x + relocation;
1570 bfd_putl32 (/*input_bfd,*/ x, contents + rel->r_offset);
1571 r = bfd_reloc_ok;
1572 }
1573 else if ((r_type == R_SPARC_WDISP30 || r_type == R_SPARC_WPLT30)
1574 && SEC_DO_RELAX (input_section)
1575 && rel->r_offset + 4 < input_section->_raw_size)
1576 {
1577 #define G0 0
1578 #define O7 15
1579 #define XCC (2 << 20)
1580 #define COND(x) (((x)&0xf)<<25)
1581 #define CONDA COND(0x8)
1582 #define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC)
1583 #define INSN_BA (F2(0,2) | CONDA)
1584 #define INSN_OR F3(2, 0x2, 0)
1585 #define INSN_NOP F2(0,4)
1586
1587 bfd_vma x, y;
1588
1589 /* If the instruction is a call with either:
1590 restore
1591 arithmetic instruction with rd == %o7
1592 where rs1 != %o7 and rs2 if it is register != %o7
1593 then we can optimize if the call destination is near
1594 by changing the call into a branch always. */
1595 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
1596 y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
1597 if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2))
1598 {
1599 if (((y & OP3(~0)) == OP3(0x3d) /* restore */
1600 || ((y & OP3(0x28)) == 0 /* arithmetic */
1601 && (y & RD(~0)) == RD(O7)))
1602 && (y & RS1(~0)) != RS1(O7)
1603 && ((y & F3I(~0))
1604 || (y & RS2(~0)) != RS2(O7)))
1605 {
1606 bfd_vma reloc;
1607
1608 reloc = relocation + rel->r_addend - rel->r_offset;
1609 reloc -= (input_section->output_section->vma
1610 + input_section->output_offset);
1611
1612 /* Ensure the reloc fits into simm22. */
1613 if ((reloc & 3) == 0
1614 && ((reloc & ~(bfd_vma)0x7fffff) == 0
1615 || ((reloc | 0x7fffff) == ~(bfd_vma)0)))
1616 {
1617 reloc >>= 2;
1618
1619 /* Check whether it fits into simm19 on v9. */
1620 if (((reloc & 0x3c0000) == 0
1621 || (reloc & 0x3c0000) == 0x3c0000)
1622 && (elf_elfheader (output_bfd)->e_flags & EF_SPARC_32PLUS))
1623 x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */
1624 else
1625 x = INSN_BA | (reloc & 0x3fffff); /* ba */
1626 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
1627 r = bfd_reloc_ok;
1628 if (rel->r_offset >= 4
1629 && (y & (0xffffffff ^ RS1(~0)))
1630 == (INSN_OR | RD(O7) | RS2(G0)))
1631 {
1632 bfd_vma z;
1633 unsigned int reg;
1634
1635 z = bfd_get_32 (input_bfd,
1636 contents + rel->r_offset - 4);
1637 if ((z & (0xffffffff ^ RD(~0)))
1638 != (INSN_OR | RS1(O7) | RS2(G0)))
1639 break;
1640
1641 /* The sequence was
1642 or %o7, %g0, %rN
1643 call foo
1644 or %rN, %g0, %o7
1645
1646 If call foo was replaced with ba, replace
1647 or %rN, %g0, %o7 with nop. */
1648
1649 reg = (y & RS1(~0)) >> 14;
1650 if (reg != ((z & RD(~0)) >> 25)
1651 || reg == G0 || reg == O7)
1652 break;
1653
1654 bfd_put_32 (input_bfd, INSN_NOP,
1655 contents + rel->r_offset + 4);
1656 }
1657
1658 }
1659 }
1660 }
1661 }
1662
1663 if (r == bfd_reloc_continue)
1664 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1665 contents, rel->r_offset,
1666 relocation, rel->r_addend);
1667
1668
1669 if (r != bfd_reloc_ok)
1670 {
1671 switch (r)
1672 {
1673 default:
1674 case bfd_reloc_outofrange:
1675 abort ();
1676 case bfd_reloc_overflow:
1677 {
1678 const char *name;
1679
1680 if (h != NULL)
1681 name = h->root.root.string;
1682 else
1683 {
1684 name = bfd_elf_string_from_elf_section (input_bfd,
1685 symtab_hdr->sh_link,
1686 sym->st_name);
1687 if (name == NULL)
1688 return false;
1689 if (*name == '\0')
1690 name = bfd_section_name (input_bfd, sec);
1691 }
1692 if (! ((*info->callbacks->reloc_overflow)
1693 (info, name, howto->name, (bfd_vma) 0,
1694 input_bfd, input_section, rel->r_offset)))
1695 return false;
1696 }
1697 break;
1698 }
1699 }
1700 }
1701
1702 return true;
1703 }
1704
1705 /* Finish up dynamic symbol handling. We set the contents of various
1706 dynamic sections here. */
1707
1708 static boolean
1709 elf32_sparc_finish_dynamic_symbol (output_bfd, info, h, sym)
1710 bfd *output_bfd;
1711 struct bfd_link_info *info;
1712 struct elf_link_hash_entry *h;
1713 Elf_Internal_Sym *sym;
1714 {
1715 bfd *dynobj;
1716
1717 dynobj = elf_hash_table (info)->dynobj;
1718
1719 if (h->plt.offset != (bfd_vma) -1)
1720 {
1721 asection *splt;
1722 asection *srela;
1723 Elf_Internal_Rela rela;
1724
1725 /* This symbol has an entry in the procedure linkage table. Set
1726 it up. */
1727
1728 BFD_ASSERT (h->dynindx != -1);
1729
1730 splt = bfd_get_section_by_name (dynobj, ".plt");
1731 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1732 BFD_ASSERT (splt != NULL && srela != NULL);
1733
1734 /* Fill in the entry in the procedure linkage table. */
1735 bfd_put_32 (output_bfd,
1736 PLT_ENTRY_WORD0 + h->plt.offset,
1737 splt->contents + h->plt.offset);
1738 bfd_put_32 (output_bfd,
1739 (PLT_ENTRY_WORD1
1740 + (((- (h->plt.offset + 4)) >> 2) & 0x3fffff)),
1741 splt->contents + h->plt.offset + 4);
1742 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
1743 splt->contents + h->plt.offset + 8);
1744
1745 /* Fill in the entry in the .rela.plt section. */
1746 rela.r_offset = (splt->output_section->vma
1747 + splt->output_offset
1748 + h->plt.offset);
1749 rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_JMP_SLOT);
1750 rela.r_addend = 0;
1751 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1752 ((Elf32_External_Rela *) srela->contents
1753 + h->plt.offset / PLT_ENTRY_SIZE - 4));
1754
1755 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1756 {
1757 /* Mark the symbol as undefined, rather than as defined in
1758 the .plt section. Leave the value alone. */
1759 sym->st_shndx = SHN_UNDEF;
1760 }
1761 }
1762
1763 if (h->got.offset != (bfd_vma) -1)
1764 {
1765 asection *sgot;
1766 asection *srela;
1767 Elf_Internal_Rela rela;
1768
1769 /* This symbol has an entry in the global offset table. Set it
1770 up. */
1771
1772 sgot = bfd_get_section_by_name (dynobj, ".got");
1773 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1774 BFD_ASSERT (sgot != NULL && srela != NULL);
1775
1776 rela.r_offset = (sgot->output_section->vma
1777 + sgot->output_offset
1778 + (h->got.offset &~ 1));
1779
1780 /* If this is a -Bsymbolic link, and the symbol is defined
1781 locally, we just want to emit a RELATIVE reloc. Likewise if
1782 the symbol was forced to be local because of a version file.
1783 The entry in the global offset table will already have been
1784 initialized in the relocate_section function. */
1785 if (info->shared
1786 && (info->symbolic || h->dynindx == -1)
1787 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
1788 rela.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
1789 else
1790 {
1791 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
1792 rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_GLOB_DAT);
1793 }
1794
1795 rela.r_addend = 0;
1796 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1797 ((Elf32_External_Rela *) srela->contents
1798 + srela->reloc_count));
1799 ++srela->reloc_count;
1800 }
1801
1802 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
1803 {
1804 asection *s;
1805 Elf_Internal_Rela rela;
1806
1807 /* This symbols needs a copy reloc. Set it up. */
1808
1809 BFD_ASSERT (h->dynindx != -1);
1810
1811 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1812 ".rela.bss");
1813 BFD_ASSERT (s != NULL);
1814
1815 rela.r_offset = (h->root.u.def.value
1816 + h->root.u.def.section->output_section->vma
1817 + h->root.u.def.section->output_offset);
1818 rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_COPY);
1819 rela.r_addend = 0;
1820 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1821 ((Elf32_External_Rela *) s->contents
1822 + s->reloc_count));
1823 ++s->reloc_count;
1824 }
1825
1826 /* Mark some specially defined symbols as absolute. */
1827 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1828 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
1829 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
1830 sym->st_shndx = SHN_ABS;
1831
1832 return true;
1833 }
1834
1835 /* Finish up the dynamic sections. */
1836
1837 static boolean
1838 elf32_sparc_finish_dynamic_sections (output_bfd, info)
1839 bfd *output_bfd;
1840 struct bfd_link_info *info;
1841 {
1842 bfd *dynobj;
1843 asection *sdyn;
1844 asection *sgot;
1845
1846 dynobj = elf_hash_table (info)->dynobj;
1847
1848 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1849
1850 if (elf_hash_table (info)->dynamic_sections_created)
1851 {
1852 asection *splt;
1853 Elf32_External_Dyn *dyncon, *dynconend;
1854
1855 splt = bfd_get_section_by_name (dynobj, ".plt");
1856 BFD_ASSERT (splt != NULL && sdyn != NULL);
1857
1858 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1859 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
1860 for (; dyncon < dynconend; dyncon++)
1861 {
1862 Elf_Internal_Dyn dyn;
1863 const char *name;
1864 boolean size;
1865
1866 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1867
1868 switch (dyn.d_tag)
1869 {
1870 case DT_PLTGOT: name = ".plt"; size = false; break;
1871 case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
1872 case DT_JMPREL: name = ".rela.plt"; size = false; break;
1873 default: name = NULL; size = false; break;
1874 }
1875
1876 if (name != NULL)
1877 {
1878 asection *s;
1879
1880 s = bfd_get_section_by_name (output_bfd, name);
1881 if (s == NULL)
1882 dyn.d_un.d_val = 0;
1883 else
1884 {
1885 if (! size)
1886 dyn.d_un.d_ptr = s->vma;
1887 else
1888 {
1889 if (s->_cooked_size != 0)
1890 dyn.d_un.d_val = s->_cooked_size;
1891 else
1892 dyn.d_un.d_val = s->_raw_size;
1893 }
1894 }
1895 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1896 }
1897 }
1898
1899 /* Clear the first four entries in the procedure linkage table,
1900 and put a nop in the last four bytes. */
1901 if (splt->_raw_size > 0)
1902 {
1903 memset (splt->contents, 0, 4 * PLT_ENTRY_SIZE);
1904 bfd_put_32 (output_bfd, SPARC_NOP,
1905 splt->contents + splt->_raw_size - 4);
1906 }
1907
1908 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
1909 PLT_ENTRY_SIZE;
1910 }
1911
1912 /* Set the first entry in the global offset table to the address of
1913 the dynamic section. */
1914 sgot = bfd_get_section_by_name (dynobj, ".got");
1915 BFD_ASSERT (sgot != NULL);
1916 if (sgot->_raw_size > 0)
1917 {
1918 if (sdyn == NULL)
1919 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1920 else
1921 bfd_put_32 (output_bfd,
1922 sdyn->output_section->vma + sdyn->output_offset,
1923 sgot->contents);
1924 }
1925
1926 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1927
1928 return true;
1929 }
1930 \f
1931 /* Functions for dealing with the e_flags field.
1932
1933 We don't define set_private_flags or copy_private_bfd_data because
1934 the only currently defined values are based on the bfd mach number,
1935 so we use the latter instead and defer setting e_flags until the
1936 file is written out. */
1937
1938 /* Merge backend specific data from an object file to the output
1939 object file when linking. */
1940
1941 static boolean
1942 elf32_sparc_merge_private_bfd_data (ibfd, obfd)
1943 bfd *ibfd;
1944 bfd *obfd;
1945 {
1946 boolean error;
1947 /* FIXME: This should not be static. */
1948 static unsigned long previous_ibfd_e_flags = (unsigned long) -1;
1949
1950 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1951 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1952 return true;
1953
1954 error = false;
1955
1956 #if 0
1957 /* ??? The native linker doesn't do this so we can't (otherwise gcc would
1958 have to know which linker is being used). Instead, the native linker
1959 bumps up the architecture level when it has to. However, I still think
1960 warnings like these are good, so it would be nice to have them turned on
1961 by some option. */
1962
1963 /* If the output machine is normal sparc, we can't allow v9 input files. */
1964 if (bfd_get_mach (obfd) == bfd_mach_sparc
1965 && (bfd_get_mach (ibfd) == bfd_mach_sparc_v8plus
1966 || bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa))
1967 {
1968 error = true;
1969 (*_bfd_error_handler)
1970 (_("%s: compiled for a v8plus system and target is v8"),
1971 bfd_get_filename (ibfd));
1972 }
1973 /* If the output machine is v9, we can't allow v9+vis input files. */
1974 if (bfd_get_mach (obfd) == bfd_mach_sparc_v8plus
1975 && bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa)
1976 {
1977 error = true;
1978 (*_bfd_error_handler)
1979 (_("%s: compiled for a v8plusa system and target is v8plus"),
1980 bfd_get_filename (ibfd));
1981 }
1982 #else
1983 if (bfd_get_mach (ibfd) >= bfd_mach_sparc_v9)
1984 {
1985 error = true;
1986 (*_bfd_error_handler)
1987 (_("%s: compiled for a 64 bit system and target is 32 bit"),
1988 bfd_get_filename (ibfd));
1989 }
1990 else if ((ibfd->flags & DYNAMIC) == 0)
1991 {
1992 if (bfd_get_mach (obfd) < bfd_get_mach (ibfd))
1993 bfd_set_arch_mach (obfd, bfd_arch_sparc, bfd_get_mach (ibfd));
1994 }
1995 #endif
1996
1997 if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA)
1998 != previous_ibfd_e_flags)
1999 && previous_ibfd_e_flags != (unsigned long) -1)
2000 {
2001 (*_bfd_error_handler)
2002 (_("%s: linking little endian files with big endian files"),
2003 bfd_get_filename (ibfd));
2004 error = true;
2005 }
2006 previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA;
2007
2008 if (error)
2009 {
2010 bfd_set_error (bfd_error_bad_value);
2011 return false;
2012 }
2013
2014 return true;
2015 }
2016 \f
2017 /* Set the right machine number. */
2018
2019 static boolean
2020 elf32_sparc_object_p (abfd)
2021 bfd *abfd;
2022 {
2023 if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS)
2024 {
2025 if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1)
2026 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
2027 bfd_mach_sparc_v8plusa);
2028 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS)
2029 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
2030 bfd_mach_sparc_v8plus);
2031 else
2032 return false;
2033 }
2034 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_LEDATA)
2035 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
2036 bfd_mach_sparc_sparclite_le);
2037 else
2038 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
2039 }
2040
2041 /* The final processing done just before writing out the object file.
2042 We need to set the e_machine field appropriately. */
2043
2044 static void
2045 elf32_sparc_final_write_processing (abfd, linker)
2046 bfd *abfd;
2047 boolean linker ATTRIBUTE_UNUSED;
2048 {
2049 switch (bfd_get_mach (abfd))
2050 {
2051 case bfd_mach_sparc :
2052 break; /* nothing to do */
2053 case bfd_mach_sparc_v8plus :
2054 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
2055 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
2056 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS;
2057 break;
2058 case bfd_mach_sparc_v8plusa :
2059 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
2060 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
2061 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1;
2062 break;
2063 case bfd_mach_sparc_sparclite_le :
2064 elf_elfheader (abfd)->e_machine = EM_SPARC;
2065 elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA;
2066 break;
2067 default :
2068 abort ();
2069 break;
2070 }
2071 }
2072 \f
2073 #define TARGET_BIG_SYM bfd_elf32_sparc_vec
2074 #define TARGET_BIG_NAME "elf32-sparc"
2075 #define ELF_ARCH bfd_arch_sparc
2076 #define ELF_MACHINE_CODE EM_SPARC
2077 #define ELF_MACHINE_ALT1 EM_SPARC32PLUS
2078 #define ELF_MAXPAGESIZE 0x10000
2079
2080 #define bfd_elf32_bfd_reloc_type_lookup elf32_sparc_reloc_type_lookup
2081 #define bfd_elf32_bfd_relax_section elf32_sparc_relax_section
2082 #define elf_info_to_howto elf32_sparc_info_to_howto
2083 #define elf_backend_create_dynamic_sections \
2084 _bfd_elf_create_dynamic_sections
2085 #define elf_backend_check_relocs elf32_sparc_check_relocs
2086 #define elf_backend_adjust_dynamic_symbol \
2087 elf32_sparc_adjust_dynamic_symbol
2088 #define elf_backend_size_dynamic_sections \
2089 elf32_sparc_size_dynamic_sections
2090 #define elf_backend_relocate_section elf32_sparc_relocate_section
2091 #define elf_backend_finish_dynamic_symbol \
2092 elf32_sparc_finish_dynamic_symbol
2093 #define elf_backend_finish_dynamic_sections \
2094 elf32_sparc_finish_dynamic_sections
2095 #define bfd_elf32_bfd_merge_private_bfd_data \
2096 elf32_sparc_merge_private_bfd_data
2097 #define elf_backend_object_p elf32_sparc_object_p
2098 #define elf_backend_final_write_processing \
2099 elf32_sparc_final_write_processing
2100 #define elf_backend_gc_mark_hook elf32_sparc_gc_mark_hook
2101 #define elf_backend_gc_sweep_hook elf32_sparc_gc_sweep_hook
2102
2103 #define elf_backend_can_gc_sections 1
2104 #define elf_backend_want_got_plt 0
2105 #define elf_backend_plt_readonly 0
2106 #define elf_backend_want_plt_sym 1
2107 #define elf_backend_got_header_size 4
2108 #define elf_backend_plt_header_size (4*PLT_ENTRY_SIZE)
2109
2110 #include "elf32-target.h"
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