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2000-08-03 H.J. Lu <[email protected]>
[binutils.git] / bfd / elf32-sparc.c
CommitLineData
252b5132 1/* SPARC-specific support for 32-bit ELF
37fb6db1
ILT		 2 Copyright (C) 1993, 94, 95, 96, 97, 98, 99, 2000
3 Free Software Foundation, Inc.
252b5132
RH		 4
5This file is part of BFD, the Binary File Descriptor library.
6
7This program is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2 of the License, or
10(at your option) any later version.
11
12This program is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with this program; if not, write to the Free Software
19Foundation, 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"
f7775d95 27#include "opcode/sparc.h"
252b5132
RH		 28
29static reloc_howto_type *elf32_sparc_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31static void elf32_sparc_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33static boolean elf32_sparc_check_relocs
34 PARAMS ((bfd *, struct bfd_link_info *, asection *,
35 const Elf_Internal_Rela *));
36static boolean elf32_sparc_adjust_dynamic_symbol
37 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
252b5132
RH		 38static boolean elf32_sparc_size_dynamic_sections
39 PARAMS ((bfd *, struct bfd_link_info *));
f7775d95
JJ		 40static boolean elf32_sparc_relax_section
41 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
252b5132
RH		 42static boolean elf32_sparc_relocate_section
43 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
44 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
45static boolean elf32_sparc_finish_dynamic_symbol
46 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
47 Elf_Internal_Sym *));
48static boolean elf32_sparc_finish_dynamic_sections
49 PARAMS ((bfd *, struct bfd_link_info *));
50static boolean elf32_sparc_merge_private_bfd_data PARAMS ((bfd *, bfd *));
51static boolean elf32_sparc_object_p
52 PARAMS ((bfd *));
53static void elf32_sparc_final_write_processing
54 PARAMS ((bfd *, boolean));
55\f
56/* The relocation "howto" table. */
57
58static bfd_reloc_status_type sparc_elf_notsupported_reloc
59 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
60static bfd_reloc_status_type sparc_elf_wdisp16_reloc
61 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
62
63reloc_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};
127static 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);
129static 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
133struct elf_reloc_map {
134 bfd_reloc_code_real_type bfd_reloc_val;
135 unsigned char elf_reloc_val;
136};
137
138static 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
185static reloc_howto_type *
186elf32_sparc_reloc_type_lookup (abfd, code)
5f771d47 187 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH		 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
214static void
215elf32_sparc_info_to_howto (abfd, cache_ptr, dst)
5f771d47 216 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH		 217 arelent *cache_ptr;
218 Elf_Internal_Rela *dst;
219{
60dac299
RH		 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 }
252b5132
RH		 234}
235\f
236/* For unsupported relocs. */
237
238static bfd_reloc_status_type
239sparc_elf_notsupported_reloc (abfd,
240 reloc_entry,
241 symbol,
242 data,
243 input_section,
244 output_bfd,
245 error_message)
5f771d47
ILT		 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;
252b5132
RH		 253{
254 return bfd_reloc_notsupported;
255}
256
257/* Handle the WDISP16 reloc. */
258
259static bfd_reloc_status_type
260sparc_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;
5f771d47 273 char **error_message ATTRIBUTE_UNUSED;
252b5132
RH		 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
344static boolean
345elf32_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:
7843f00e
ILT		 517 if (h != NULL)
518 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
519
252b5132
RH		 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:
7843f00e
ILT		 531 if (h != NULL)
532 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
533
252b5132
RH		 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:
7843f00e
ILT		 556 if (h != NULL)
557 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
558
252b5132
RH		 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
619static asection *
620elf32_sparc_gc_mark_hook (abfd, info, rel, h, sym)
621 bfd *abfd;
5f771d47 622 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 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;
e049a0de
ILT		 645
646 default:
647 break;
252b5132
RH		 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. */
666static boolean
667elf32_sparc_gc_sweep_hook (abfd, info, sec, relocs)
668 bfd *abfd;
5f771d47 669 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 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
733static boolean
734elf32_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
7843f00e
ILT		 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
252b5132
RH		 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
909static boolean
910elf32_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 {
7f8d5fc9 1017 _bfd_strip_section_from_output (info, s);
252b5132
RH		 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;
d6cf2879 1059 info->flags |= DF_TEXTREL;
252b5132
RH		 1060 }
1061 }
1062
252b5132
RH		 1063 return true;
1064}
1065
f7775d95
JJ		 1066
1067#define SET_SEC_DO_RELAX(section) do { elf_section_data(section)->tdata = (void *)1; } while (0)
1068#define SEC_DO_RELAX(section) (elf_section_data(section)->tdata == (void *)1)
1069
1070/*ARGSUSED*/
1071static boolean
1072elf32_sparc_relax_section (abfd, section, link_info, again)
1073 bfd *abfd ATTRIBUTE_UNUSED;
1074 asection *section ATTRIBUTE_UNUSED;
1075 struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
1076 boolean *again;
1077{
1078 *again = false;
1079 SET_SEC_DO_RELAX (section);
1080 return true;
1081}
1082
252b5132
RH		 1083/* Relocate a SPARC ELF section. */
1084
1085static boolean
1086elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section,
1087 contents, relocs, local_syms, local_sections)
1088 bfd *output_bfd;
1089 struct bfd_link_info *info;
1090 bfd *input_bfd;
1091 asection *input_section;
1092 bfd_byte *contents;
1093 Elf_Internal_Rela *relocs;
1094 Elf_Internal_Sym *local_syms;
1095 asection **local_sections;
1096{
1097 bfd *dynobj;
1098 Elf_Internal_Shdr *symtab_hdr;
1099 struct elf_link_hash_entry **sym_hashes;
1100 bfd_vma *local_got_offsets;
1101 bfd_vma got_base;
1102 asection *sgot;
1103 asection *splt;
1104 asection *sreloc;
1105 Elf_Internal_Rela *rel;
1106 Elf_Internal_Rela *relend;
1107
1108 dynobj = elf_hash_table (info)->dynobj;
1109 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1110 sym_hashes = elf_sym_hashes (input_bfd);
1111 local_got_offsets = elf_local_got_offsets (input_bfd);
1112
1113 if (elf_hash_table (info)->hgot == NULL)
1114 got_base = 0;
1115 else
1116 got_base = elf_hash_table (info)->hgot->root.u.def.value;
1117
1118 sgot = NULL;
1119 splt = NULL;
1120 sreloc = NULL;
1121
1122 rel = relocs;
1123 relend = relocs + input_section->reloc_count;
1124 for (; rel < relend; rel++)
1125 {
1126 int r_type;
1127 reloc_howto_type *howto;
1128 unsigned long r_symndx;
1129 struct elf_link_hash_entry *h;
1130 Elf_Internal_Sym *sym;
1131 asection *sec;
1132 bfd_vma relocation;
1133 bfd_reloc_status_type r;
1134
1135 r_type = ELF32_R_TYPE (rel->r_info);
1136
1137 if (r_type == R_SPARC_GNU_VTINHERIT
1138 || r_type == R_SPARC_GNU_VTENTRY)
1139 continue;
1140
60dac299 1141 if (r_type < 0 || r_type >= (int) R_SPARC_max_std)
252b5132
RH		 1142 {
1143 bfd_set_error (bfd_error_bad_value);
1144 return false;
1145 }
1146 howto = _bfd_sparc_elf_howto_table + r_type;
1147
1148 r_symndx = ELF32_R_SYM (rel->r_info);
1149
1150 if (info->relocateable)
1151 {
1152 /* This is a relocateable link. We don't have to change
1153 anything, unless the reloc is against a section symbol,
1154 in which case we have to adjust according to where the
1155 section symbol winds up in the output section. */
1156 if (r_symndx < symtab_hdr->sh_info)
1157 {
1158 sym = local_syms + r_symndx;
1159 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1160 {
1161 sec = local_sections[r_symndx];
1162 rel->r_addend += sec->output_offset + sym->st_value;
1163 }
1164 }
1165
1166 continue;
1167 }
1168
1169 /* This is a final link. */
1170 h = NULL;
1171 sym = NULL;
1172 sec = NULL;
1173 if (r_symndx < symtab_hdr->sh_info)
1174 {
1175 sym = local_syms + r_symndx;
1176 sec = local_sections[r_symndx];
1177 relocation = (sec->output_section->vma
1178 + sec->output_offset
1179 + sym->st_value);
1180 }
1181 else
1182 {
1183 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1184 while (h->root.type == bfd_link_hash_indirect
1185 || h->root.type == bfd_link_hash_warning)
1186 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1187 if (h->root.type == bfd_link_hash_defined
1188 || h->root.type == bfd_link_hash_defweak)
1189 {
1190 sec = h->root.u.def.section;
1191 if ((r_type == R_SPARC_WPLT30
1192 && h->plt.offset != (bfd_vma) -1)
1193 || ((r_type == R_SPARC_GOT10
1194 || r_type == R_SPARC_GOT13
1195 || r_type == R_SPARC_GOT22)
1196 && elf_hash_table (info)->dynamic_sections_created
1197 && (! info->shared
1198 || (! info->symbolic && h->dynindx != -1)
1199 || (h->elf_link_hash_flags
1200 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1201 || (info->shared
1202 && ((! info->symbolic && h->dynindx != -1)
1203 || (h->elf_link_hash_flags
1204 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1205 && (r_type == R_SPARC_8
1206 || r_type == R_SPARC_16
1207 || r_type == R_SPARC_32
1208 || r_type == R_SPARC_DISP8
1209 || r_type == R_SPARC_DISP16
1210 || r_type == R_SPARC_DISP32
1211 || r_type == R_SPARC_WDISP30
1212 || r_type == R_SPARC_WDISP22
1213 || r_type == R_SPARC_WDISP19
1214 || r_type == R_SPARC_WDISP16
1215 || r_type == R_SPARC_HI22
1216 || r_type == R_SPARC_22
1217 || r_type == R_SPARC_13
1218 || r_type == R_SPARC_LO10
1219 || r_type == R_SPARC_UA32
1220 || ((r_type == R_SPARC_PC10
1221 || r_type == R_SPARC_PC22)
1222 && strcmp (h->root.root.string,
1223 "_GLOBAL_OFFSET_TABLE_") != 0))))
1224 {
1225 /* In these cases, we don't need the relocation
1226 value. We check specially because in some
1227 obscure cases sec->output_section will be NULL. */
1228 relocation = 0;
1229 }
1230 else
1231 relocation = (h->root.u.def.value
1232 + sec->output_section->vma
1233 + sec->output_offset);
1234 }
1235 else if (h->root.type == bfd_link_hash_undefweak)
1236 relocation = 0;
3a27a730
L		 1237 else if (info->shared && !info->symbolic
1238 && !info->no_undefined
1239 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
252b5132
RH		 1240 relocation = 0;
1241 else
1242 {
1243 if (! ((*info->callbacks->undefined_symbol)
1244 (info, h->root.root.string, input_bfd,
5cc7c785 1245 input_section, rel->r_offset,
3a27a730
L		 1246 (!info->shared || info->no_undefined
1247 || ELF_ST_VISIBILITY (h->other)))))
252b5132
RH		 1248 return false;
1249 relocation = 0;
1250 }
1251 }
1252
1253 switch (r_type)
1254 {
1255 case R_SPARC_GOT10:
1256 case R_SPARC_GOT13:
1257 case R_SPARC_GOT22:
1258 /* Relocation is to the entry for this symbol in the global
1259 offset table. */
1260 if (sgot == NULL)
1261 {
1262 sgot = bfd_get_section_by_name (dynobj, ".got");
1263 BFD_ASSERT (sgot != NULL);
1264 }
1265
1266 if (h != NULL)
1267 {
1268 bfd_vma off;
1269
1270 off = h->got.offset;
1271 BFD_ASSERT (off != (bfd_vma) -1);
1272
1273 if (! elf_hash_table (info)->dynamic_sections_created
1274 || (info->shared
1275 && (info->symbolic || h->dynindx == -1)
1276 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1277 {
1278 /* This is actually a static link, or it is a
1279 -Bsymbolic link and the symbol is defined
1280 locally, or the symbol was forced to be local
1281 because of a version file. We must initialize
1282 this entry in the global offset table. Since the
1283 offset must always be a multiple of 4, we use the
1284 least significant bit to record whether we have
1285 initialized it already.
1286
1287 When doing a dynamic link, we create a .rela.got
1288 relocation entry to initialize the value. This
1289 is done in the finish_dynamic_symbol routine. */
1290 if ((off & 1) != 0)
1291 off &= ~1;
1292 else
1293 {
1294 bfd_put_32 (output_bfd, relocation,
1295 sgot->contents + off);
1296 h->got.offset |= 1;
1297 }
1298 }
1299
1300 relocation = sgot->output_offset + off - got_base;
1301 }
1302 else
1303 {
1304 bfd_vma off;
1305
1306 BFD_ASSERT (local_got_offsets != NULL
1307 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1308
1309 off = local_got_offsets[r_symndx];
1310
1311 /* The offset must always be a multiple of 4. We use
1312 the least significant bit to record whether we have
1313 already processed this entry. */
1314 if ((off & 1) != 0)
1315 off &= ~1;
1316 else
1317 {
1318 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1319
1320 if (info->shared)
1321 {
1322 asection *srelgot;
1323 Elf_Internal_Rela outrel;
1324
1325 /* We need to generate a R_SPARC_RELATIVE reloc
1326 for the dynamic linker. */
1327 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1328 BFD_ASSERT (srelgot != NULL);
1329
1330 outrel.r_offset = (sgot->output_section->vma
1331 + sgot->output_offset
1332 + off);
1333 outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
1334 outrel.r_addend = 0;
1335 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1336 (((Elf32_External_Rela *)
1337 srelgot->contents)
1338 + srelgot->reloc_count));
1339 ++srelgot->reloc_count;
1340 }
1341
1342 local_got_offsets[r_symndx] |= 1;
1343 }
1344
1345 relocation = sgot->output_offset + off - got_base;
1346 }
1347
1348 break;
1349
1350 case R_SPARC_WPLT30:
1351 /* Relocation is to the entry for this symbol in the
1352 procedure linkage table. */
1353
1354 /* The Solaris native assembler will generate a WPLT30 reloc
1355 for a local symbol if you assemble a call from one
1356 section to another when using -K pic. We treat it as
1357 WDISP30. */
1358 if (h == NULL)
1359 break;
1360
1361 if (h->plt.offset == (bfd_vma) -1)
1362 {
1363 /* We didn't make a PLT entry for this symbol. This
1364 happens when statically linking PIC code, or when
1365 using -Bsymbolic. */
1366 break;
1367 }
1368
1369 if (splt == NULL)
1370 {
1371 splt = bfd_get_section_by_name (dynobj, ".plt");
1372 BFD_ASSERT (splt != NULL);
1373 }
1374
1375 relocation = (splt->output_section->vma
1376 + splt->output_offset
1377 + h->plt.offset);
1378 break;
1379
1380 case R_SPARC_PC10:
1381 case R_SPARC_PC22:
1382 if (h != NULL
1383 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1384 break;
1385 /* Fall through. */
1386 case R_SPARC_DISP8:
1387 case R_SPARC_DISP16:
1388 case R_SPARC_DISP32:
1389 case R_SPARC_WDISP30:
1390 case R_SPARC_WDISP22:
1391 case R_SPARC_WDISP19:
1392 case R_SPARC_WDISP16:
1393 if (h == NULL
1394 || (info->symbolic
1395 && (h->elf_link_hash_flags
1396 & ELF_LINK_HASH_DEF_REGULAR) != 0))
1397 break;
1398 /* Fall through. */
1399 case R_SPARC_8:
1400 case R_SPARC_16:
1401 case R_SPARC_32:
1402 case R_SPARC_HI22:
1403 case R_SPARC_22:
1404 case R_SPARC_13:
1405 case R_SPARC_LO10:
1406 case R_SPARC_UA32:
1407 if (info->shared)
1408 {
1409 Elf_Internal_Rela outrel;
1410 boolean skip;
1411
1412 /* When generating a shared object, these relocations
1413 are copied into the output file to be resolved at run
1414 time. */
1415
1416 if (sreloc == NULL)
1417 {
1418 const char *name;
1419
1420 name = (bfd_elf_string_from_elf_section
1421 (input_bfd,
1422 elf_elfheader (input_bfd)->e_shstrndx,
1423 elf_section_data (input_section)->rel_hdr.sh_name));
1424 if (name == NULL)
1425 return false;
1426
1427 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1428 && strcmp (bfd_get_section_name (input_bfd,
1429 input_section),
1430 name + 5) == 0);
1431
1432 sreloc = bfd_get_section_by_name (dynobj, name);
1433 BFD_ASSERT (sreloc != NULL);
1434 }
1435
1436 skip = false;
1437
1438 if (elf_section_data (input_section)->stab_info == NULL)
1439 outrel.r_offset = rel->r_offset;
1440 else
1441 {
1442 bfd_vma off;
1443
1444 off = (_bfd_stab_section_offset
1445 (output_bfd, &elf_hash_table (info)->stab_info,
1446 input_section,
1447 &elf_section_data (input_section)->stab_info,
1448 rel->r_offset));
1449 if (off == (bfd_vma) -1)
1450 skip = true;
1451 outrel.r_offset = off;
1452 }
1453
1454 outrel.r_offset += (input_section->output_section->vma
1455 + input_section->output_offset);
1456
1457 if (skip)
1458 memset (&outrel, 0, sizeof outrel);
1459 /* h->dynindx may be -1 if the symbol was marked to
1460 become local. */
1461 else if (h != NULL
1462 && ((! info->symbolic && h->dynindx != -1)
1463 || (h->elf_link_hash_flags
1464 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1465 {
1466 BFD_ASSERT (h->dynindx != -1);
1467 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1468 outrel.r_addend = rel->r_addend;
1469 }
1470 else
1471 {
1472 if (r_type == R_SPARC_32)
1473 {
1474 outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
1475 outrel.r_addend = relocation + rel->r_addend;
1476 }
1477 else
1478 {
1479 long indx;
1480
1481 if (h == NULL)
1482 sec = local_sections[r_symndx];
1483 else
1484 {
1485 BFD_ASSERT (h->root.type == bfd_link_hash_defined
1486 || (h->root.type
1487 == bfd_link_hash_defweak));
1488 sec = h->root.u.def.section;
1489 }
1490 if (sec != NULL && bfd_is_abs_section (sec))
1491 indx = 0;
1492 else if (sec == NULL || sec->owner == NULL)
1493 {
1494 bfd_set_error (bfd_error_bad_value);
1495 return false;
1496 }
1497 else
1498 {
1499 asection *osec;
1500
1501 osec = sec->output_section;
1502 indx = elf_section_data (osec)->dynindx;
1503
1504 /* FIXME: we really should be able to link non-pic
1505 shared libraries. */
1506 if (indx == 0)
1507 {
1508 BFD_FAIL ();
1509 (*_bfd_error_handler)
1510 (_("%s: probably compiled without -fPIC?"),
1511 bfd_get_filename (input_bfd));
1512 bfd_set_error (bfd_error_bad_value);
1513 return false;
1514 }
1515 }
1516
1517 outrel.r_info = ELF32_R_INFO (indx, r_type);
840a9995 1518 outrel.r_addend = relocation + rel->r_addend;
252b5132
RH		 1519 }
1520 }
1521
1522 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1523 (((Elf32_External_Rela *)
1524 sreloc->contents)
1525 + sreloc->reloc_count));
1526 ++sreloc->reloc_count;
1527
1528 /* This reloc will be computed at runtime, so there's no
1529 need to do anything now, unless this is a RELATIVE
1530 reloc in an unallocated section. */
1531 if (skip
1532 || (input_section->flags & SEC_ALLOC) != 0
1533 || ELF32_R_TYPE (outrel.r_info) != R_SPARC_RELATIVE)
1534 continue;
1535 }
1536 break;
1537
1538 default:
1539 break;
1540 }
1541
f7775d95 1542 r = bfd_reloc_continue;
252b5132
RH		 1543 if (r_type == R_SPARC_WDISP16)
1544 {
1545 bfd_vma x;
1546
1547 relocation += rel->r_addend;
1548 relocation -= (input_section->output_section->vma
1549 + input_section->output_offset);
1550 relocation -= rel->r_offset;
1551
1552 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
1553 x |= ((((relocation >> 2) & 0xc000) << 6)
1554 | ((relocation >> 2) & 0x3fff));
1555 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
1556
1557 if ((bfd_signed_vma) relocation < - 0x40000
1558 || (bfd_signed_vma) relocation > 0x3ffff)
1559 r = bfd_reloc_overflow;
1560 else
1561 r = bfd_reloc_ok;
1562 }
1563 else if (r_type == R_SPARC_REV32)
1564 {
1565 bfd_vma x;
1566
1567 relocation = relocation + rel->r_addend;
1568
1569 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
1570 x = x + relocation;
1571 bfd_putl32 (/*input_bfd,*/ x, contents + rel->r_offset);
1572 r = bfd_reloc_ok;
1573 }
f7775d95
JJ		 1574 else if ((r_type == R_SPARC_WDISP30 || r_type == R_SPARC_WPLT30)
1575 && SEC_DO_RELAX (input_section)
1576 && rel->r_offset + 4 < input_section->_raw_size)
1577 {
1578#define G0 0
1579#define O7 15
1580#define XCC (2 << 20)
1581#define COND(x) (((x)&0xf)<<25)
1582#define CONDA COND(0x8)
1583#define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC)
1584#define INSN_BA (F2(0,2) | CONDA)
1585#define INSN_OR F3(2, 0x2, 0)
1586#define INSN_NOP F2(0,4)
1587
1588 bfd_vma x, y;
1589
1590 /* If the instruction is a call with either:
1591 restore
1592 arithmetic instruction with rd == %o7
1593 where rs1 != %o7 and rs2 if it is register != %o7
1594 then we can optimize if the call destination is near
1595 by changing the call into a branch always. */
1596 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
1597 y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
1598 if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2))
1599 {
1600 if (((y & OP3(~0)) == OP3(0x3d) /* restore */
1601 || ((y & OP3(0x28)) == 0 /* arithmetic */
1602 && (y & RD(~0)) == RD(O7)))
1603 && (y & RS1(~0)) != RS1(O7)
1604 && ((y & F3I(~0))
1605 || (y & RS2(~0)) != RS2(O7)))
1606 {
1607 bfd_vma reloc;
1608
1609 reloc = relocation + rel->r_addend - rel->r_offset;
1610 reloc -= (input_section->output_section->vma
1611 + input_section->output_offset);
1612
1613 /* Ensure the reloc fits into simm22. */
1614 if ((reloc & 3) == 0
1615 && ((reloc & ~(bfd_vma)0x7fffff) == 0
1616 || ((reloc | 0x7fffff) == ~(bfd_vma)0)))
1617 {
1618 reloc >>= 2;
1619
1620 /* Check whether it fits into simm19 on v9. */
1621 if (((reloc & 0x3c0000) == 0
1622 || (reloc & 0x3c0000) == 0x3c0000)
1623 && (elf_elfheader (output_bfd)->e_flags & EF_SPARC_32PLUS))
1624 x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */
1625 else
1626 x = INSN_BA | (reloc & 0x3fffff); /* ba */
1627 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
1628 r = bfd_reloc_ok;
1629 if (rel->r_offset >= 4
1630 && (y & (0xffffffff ^ RS1(~0)))
1631 == (INSN_OR | RD(O7) | RS2(G0)))
1632 {
1633 bfd_vma z;
1634 unsigned int reg;
1635
1636 z = bfd_get_32 (input_bfd,
1637 contents + rel->r_offset - 4);
1638 if ((z & (0xffffffff ^ RD(~0)))
1639 != (INSN_OR | RS1(O7) | RS2(G0)))
1640 break;
1641
1642 /* The sequence was
1643 or %o7, %g0, %rN
1644 call foo
1645 or %rN, %g0, %o7
1646
1647 If call foo was replaced with ba, replace
1648 or %rN, %g0, %o7 with nop. */
1649
1650 reg = (y & RS1(~0)) >> 14;
1651 if (reg != ((z & RD(~0)) >> 25)
1652 || reg == G0 || reg == O7)
1653 break;
1654
1655 bfd_put_32 (input_bfd, INSN_NOP,
1656 contents + rel->r_offset + 4);
1657 }
1658
1659 }
1660 }
1661 }
1662 }
1663
1664 if (r == bfd_reloc_continue)
252b5132
RH		 1665 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1666 contents, rel->r_offset,
1667 relocation, rel->r_addend);
1668
1669
1670 if (r != bfd_reloc_ok)
1671 {
1672 switch (r)
1673 {
1674 default:
1675 case bfd_reloc_outofrange:
1676 abort ();
1677 case bfd_reloc_overflow:
1678 {
1679 const char *name;
1680
1681 if (h != NULL)
1682 name = h->root.root.string;
1683 else
1684 {
1685 name = bfd_elf_string_from_elf_section (input_bfd,
1686 symtab_hdr->sh_link,
1687 sym->st_name);
1688 if (name == NULL)
1689 return false;
1690 if (*name == '\0')
1691 name = bfd_section_name (input_bfd, sec);
1692 }
1693 if (! ((*info->callbacks->reloc_overflow)
1694 (info, name, howto->name, (bfd_vma) 0,
1695 input_bfd, input_section, rel->r_offset)))
1696 return false;
1697 }
1698 break;
1699 }
1700 }
1701 }
1702
1703 return true;
1704}
1705
1706/* Finish up dynamic symbol handling. We set the contents of various
1707 dynamic sections here. */
1708
1709static boolean
1710elf32_sparc_finish_dynamic_symbol (output_bfd, info, h, sym)
1711 bfd *output_bfd;
1712 struct bfd_link_info *info;
1713 struct elf_link_hash_entry *h;
1714 Elf_Internal_Sym *sym;
1715{
1716 bfd *dynobj;
1717
1718 dynobj = elf_hash_table (info)->dynobj;
1719
1720 if (h->plt.offset != (bfd_vma) -1)
1721 {
1722 asection *splt;
1723 asection *srela;
1724 Elf_Internal_Rela rela;
1725
1726 /* This symbol has an entry in the procedure linkage table. Set
1727 it up. */
1728
1729 BFD_ASSERT (h->dynindx != -1);
1730
1731 splt = bfd_get_section_by_name (dynobj, ".plt");
1732 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1733 BFD_ASSERT (splt != NULL && srela != NULL);
1734
1735 /* Fill in the entry in the procedure linkage table. */
1736 bfd_put_32 (output_bfd,
1737 PLT_ENTRY_WORD0 + h->plt.offset,
1738 splt->contents + h->plt.offset);
1739 bfd_put_32 (output_bfd,
1740 (PLT_ENTRY_WORD1
1741 + (((- (h->plt.offset + 4)) >> 2) & 0x3fffff)),
1742 splt->contents + h->plt.offset + 4);
1743 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
1744 splt->contents + h->plt.offset + 8);
1745
1746 /* Fill in the entry in the .rela.plt section. */
1747 rela.r_offset = (splt->output_section->vma
1748 + splt->output_offset
1749 + h->plt.offset);
1750 rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_JMP_SLOT);
1751 rela.r_addend = 0;
1752 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1753 ((Elf32_External_Rela *) srela->contents
1754 + h->plt.offset / PLT_ENTRY_SIZE - 4));
1755
1756 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1757 {
1758 /* Mark the symbol as undefined, rather than as defined in
1759 the .plt section. Leave the value alone. */
1760 sym->st_shndx = SHN_UNDEF;
1761 }
1762 }
1763
1764 if (h->got.offset != (bfd_vma) -1)
1765 {
1766 asection *sgot;
1767 asection *srela;
1768 Elf_Internal_Rela rela;
1769
1770 /* This symbol has an entry in the global offset table. Set it
1771 up. */
1772
1773 sgot = bfd_get_section_by_name (dynobj, ".got");
1774 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1775 BFD_ASSERT (sgot != NULL && srela != NULL);
1776
1777 rela.r_offset = (sgot->output_section->vma
1778 + sgot->output_offset
1779 + (h->got.offset &~ 1));
1780
1781 /* If this is a -Bsymbolic link, and the symbol is defined
1782 locally, we just want to emit a RELATIVE reloc. Likewise if
1783 the symbol was forced to be local because of a version file.
1784 The entry in the global offset table will already have been
1785 initialized in the relocate_section function. */
1786 if (info->shared
1787 && (info->symbolic || h->dynindx == -1)
1788 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
1789 rela.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
1790 else
1791 {
1792 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
1793 rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_GLOB_DAT);
1794 }
1795
1796 rela.r_addend = 0;
1797 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1798 ((Elf32_External_Rela *) srela->contents
1799 + srela->reloc_count));
1800 ++srela->reloc_count;
1801 }
1802
1803 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
1804 {
1805 asection *s;
1806 Elf_Internal_Rela rela;
1807
1808 /* This symbols needs a copy reloc. Set it up. */
1809
1810 BFD_ASSERT (h->dynindx != -1);
1811
1812 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1813 ".rela.bss");
1814 BFD_ASSERT (s != NULL);
1815
1816 rela.r_offset = (h->root.u.def.value
1817 + h->root.u.def.section->output_section->vma
1818 + h->root.u.def.section->output_offset);
1819 rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_COPY);
1820 rela.r_addend = 0;
1821 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1822 ((Elf32_External_Rela *) s->contents
1823 + s->reloc_count));
1824 ++s->reloc_count;
1825 }
1826
1827 /* Mark some specially defined symbols as absolute. */
1828 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1829 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
1830 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
1831 sym->st_shndx = SHN_ABS;
1832
1833 return true;
1834}
1835
1836/* Finish up the dynamic sections. */
1837
1838static boolean
1839elf32_sparc_finish_dynamic_sections (output_bfd, info)
1840 bfd *output_bfd;
1841 struct bfd_link_info *info;
1842{
1843 bfd *dynobj;
1844 asection *sdyn;
1845 asection *sgot;
1846
1847 dynobj = elf_hash_table (info)->dynobj;
1848
1849 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1850
1851 if (elf_hash_table (info)->dynamic_sections_created)
1852 {
1853 asection *splt;
1854 Elf32_External_Dyn *dyncon, *dynconend;
1855
1856 splt = bfd_get_section_by_name (dynobj, ".plt");
1857 BFD_ASSERT (splt != NULL && sdyn != NULL);
1858
1859 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1860 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
1861 for (; dyncon < dynconend; dyncon++)
1862 {
1863 Elf_Internal_Dyn dyn;
1864 const char *name;
1865 boolean size;
1866
1867 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1868
1869 switch (dyn.d_tag)
1870 {
1871 case DT_PLTGOT: name = ".plt"; size = false; break;
1872 case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
1873 case DT_JMPREL: name = ".rela.plt"; size = false; break;
1874 default: name = NULL; size = false; break;
1875 }
1876
1877 if (name != NULL)
1878 {
1879 asection *s;
1880
1881 s = bfd_get_section_by_name (output_bfd, name);
1882 if (s == NULL)
1883 dyn.d_un.d_val = 0;
1884 else
1885 {
1886 if (! size)
1887 dyn.d_un.d_ptr = s->vma;
1888 else
1889 {
1890 if (s->_cooked_size != 0)
1891 dyn.d_un.d_val = s->_cooked_size;
1892 else
1893 dyn.d_un.d_val = s->_raw_size;
1894 }
1895 }
1896 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1897 }
1898 }
1899
1900 /* Clear the first four entries in the procedure linkage table,
1901 and put a nop in the last four bytes. */
1902 if (splt->_raw_size > 0)
1903 {
1904 memset (splt->contents, 0, 4 * PLT_ENTRY_SIZE);
1905 bfd_put_32 (output_bfd, SPARC_NOP,
1906 splt->contents + splt->_raw_size - 4);
1907 }
1908
1909 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
1910 PLT_ENTRY_SIZE;
1911 }
1912
1913 /* Set the first entry in the global offset table to the address of
1914 the dynamic section. */
1915 sgot = bfd_get_section_by_name (dynobj, ".got");
1916 BFD_ASSERT (sgot != NULL);
1917 if (sgot->_raw_size > 0)
1918 {
1919 if (sdyn == NULL)
1920 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1921 else
1922 bfd_put_32 (output_bfd,
1923 sdyn->output_section->vma + sdyn->output_offset,
1924 sgot->contents);
1925 }
1926
1927 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1928
252b5132
RH		 1929 return true;
1930}
1931\f
1932/* Functions for dealing with the e_flags field.
1933
1934 We don't define set_private_flags or copy_private_bfd_data because
1935 the only currently defined values are based on the bfd mach number,
1936 so we use the latter instead and defer setting e_flags until the
1937 file is written out. */
1938
1939/* Merge backend specific data from an object file to the output
1940 object file when linking. */
1941
1942static boolean
1943elf32_sparc_merge_private_bfd_data (ibfd, obfd)
1944 bfd *ibfd;
1945 bfd *obfd;
1946{
1947 boolean error;
5f771d47
ILT		 1948 /* FIXME: This should not be static. */
1949 static unsigned long previous_ibfd_e_flags = (unsigned long) -1;
252b5132
RH		 1950
1951 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1952 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1953 return true;
1954
1955 error = false;
1956
1957#if 0
1958 /* ??? The native linker doesn't do this so we can't (otherwise gcc would
1959 have to know which linker is being used). Instead, the native linker
1960 bumps up the architecture level when it has to. However, I still think
1961 warnings like these are good, so it would be nice to have them turned on
1962 by some option. */
1963
1964 /* If the output machine is normal sparc, we can't allow v9 input files. */
1965 if (bfd_get_mach (obfd) == bfd_mach_sparc
1966 && (bfd_get_mach (ibfd) == bfd_mach_sparc_v8plus
1967 || bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa))
1968 {
1969 error = true;
1970 (*_bfd_error_handler)
1971 (_("%s: compiled for a v8plus system and target is v8"),
1972 bfd_get_filename (ibfd));
1973 }
1974 /* If the output machine is v9, we can't allow v9+vis input files. */
1975 if (bfd_get_mach (obfd) == bfd_mach_sparc_v8plus
1976 && bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa)
1977 {
1978 error = true;
1979 (*_bfd_error_handler)
1980 (_("%s: compiled for a v8plusa system and target is v8plus"),
1981 bfd_get_filename (ibfd));
1982 }
1983#else
1984 if (bfd_get_mach (ibfd) >= bfd_mach_sparc_v9)
1985 {
1986 error = true;
1987 (*_bfd_error_handler)
1988 (_("%s: compiled for a 64 bit system and target is 32 bit"),
1989 bfd_get_filename (ibfd));
1990 }
37fb6db1
ILT		 1991 else if ((ibfd->flags & DYNAMIC) == 0)
1992 {
1993 if (bfd_get_mach (obfd) < bfd_get_mach (ibfd))
1994 bfd_set_arch_mach (obfd, bfd_arch_sparc, bfd_get_mach (ibfd));
1995 }
252b5132
RH		 1996#endif
1997
1998 if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA)
1999 != previous_ibfd_e_flags)
5f771d47 2000 && previous_ibfd_e_flags != (unsigned long) -1)
252b5132
RH		 2001 {
2002 (*_bfd_error_handler)
2003 (_("%s: linking little endian files with big endian files"),
2004 bfd_get_filename (ibfd));
2005 error = true;
2006 }
2007 previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA;
2008
2009 if (error)
2010 {
2011 bfd_set_error (bfd_error_bad_value);
2012 return false;
2013 }
2014
2015 return true;
2016}
2017\f
2018/* Set the right machine number. */
2019
2020static boolean
2021elf32_sparc_object_p (abfd)
2022 bfd *abfd;
2023{
2024 if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS)
2025 {
2026 if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1)
2027 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
2028 bfd_mach_sparc_v8plusa);
2029 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS)
2030 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
2031 bfd_mach_sparc_v8plus);
2032 else
2033 return false;
2034 }
2035 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_LEDATA)
2036 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
2037 bfd_mach_sparc_sparclite_le);
2038 else
2039 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
2040}
2041
2042/* The final processing done just before writing out the object file.
2043 We need to set the e_machine field appropriately. */
2044
2045static void
2046elf32_sparc_final_write_processing (abfd, linker)
2047 bfd *abfd;
5f771d47 2048 boolean linker ATTRIBUTE_UNUSED;
252b5132
RH		 2049{
2050 switch (bfd_get_mach (abfd))
2051 {
2052 case bfd_mach_sparc :
2053 break; /* nothing to do */
2054 case bfd_mach_sparc_v8plus :
2055 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
2056 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
2057 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS;
2058 break;
2059 case bfd_mach_sparc_v8plusa :
2060 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
2061 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
2062 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1;
2063 break;
2064 case bfd_mach_sparc_sparclite_le :
2065 elf_elfheader (abfd)->e_machine = EM_SPARC;
2066 elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA;
2067 break;
2068 default :
2069 abort ();
2070 break;
2071 }
2072}
2073\f
2074#define TARGET_BIG_SYM bfd_elf32_sparc_vec
2075#define TARGET_BIG_NAME "elf32-sparc"
2076#define ELF_ARCH bfd_arch_sparc
2077#define ELF_MACHINE_CODE EM_SPARC
2078#define ELF_MACHINE_ALT1 EM_SPARC32PLUS
2079#define ELF_MAXPAGESIZE 0x10000
2080
2081#define bfd_elf32_bfd_reloc_type_lookup elf32_sparc_reloc_type_lookup
f7775d95 2082#define bfd_elf32_bfd_relax_section elf32_sparc_relax_section
252b5132
RH		 2083#define elf_info_to_howto elf32_sparc_info_to_howto
2084#define elf_backend_create_dynamic_sections \
2085 _bfd_elf_create_dynamic_sections
2086#define elf_backend_check_relocs elf32_sparc_check_relocs
2087#define elf_backend_adjust_dynamic_symbol \
2088 elf32_sparc_adjust_dynamic_symbol
2089#define elf_backend_size_dynamic_sections \
2090 elf32_sparc_size_dynamic_sections
2091#define elf_backend_relocate_section elf32_sparc_relocate_section
2092#define elf_backend_finish_dynamic_symbol \
2093 elf32_sparc_finish_dynamic_symbol
2094#define elf_backend_finish_dynamic_sections \
2095 elf32_sparc_finish_dynamic_sections
2096#define bfd_elf32_bfd_merge_private_bfd_data \
2097 elf32_sparc_merge_private_bfd_data
2098#define elf_backend_object_p elf32_sparc_object_p
2099#define elf_backend_final_write_processing \
2100 elf32_sparc_final_write_processing
2101#define elf_backend_gc_mark_hook elf32_sparc_gc_mark_hook
2102#define elf_backend_gc_sweep_hook elf32_sparc_gc_sweep_hook
2103
2104#define elf_backend_can_gc_sections 1
2105#define elf_backend_want_got_plt 0
2106#define elf_backend_plt_readonly 0
2107#define elf_backend_want_plt_sym 1
2108#define elf_backend_got_header_size 4
2109#define elf_backend_plt_header_size (4*PLT_ENTRY_SIZE)
2110
2111#include "elf32-target.h"
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