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[binutils.git] / bfd / elf64-sparc.c
blobc3a3f05a0b24af425e91e661e88a2904cfcbf2bd
1 /* SPARC-specific support for 64-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
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 "libbfd.h"
24 #include "elf-bfd.h"
25 #include "opcode/sparc.h"
26
27 /* This is defined if one wants to build upward compatible binaries
28 with the original sparc64-elf toolchain. The support is kept in for
29 now but is turned off by default. dje 970930 */
30 /*#define SPARC64_OLD_RELOCS*/
31
32 #include "elf/sparc.h"
33
34 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
35 #define MINUS_ONE (~ (bfd_vma) 0)
36
37 static struct bfd_link_hash_table * sparc64_elf_bfd_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_reloc_status_type init_insn_reloc
40 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *,
41 bfd *, bfd_vma *, bfd_vma *));
42 static reloc_howto_type *sparc64_elf_reloc_type_lookup
43 PARAMS ((bfd *, bfd_reloc_code_real_type));
44 static void sparc64_elf_info_to_howto
45 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
46
47 static void sparc64_elf_build_plt
48 PARAMS ((bfd *, unsigned char *, int));
49 static bfd_vma sparc64_elf_plt_entry_offset
50 PARAMS ((bfd_vma));
51 static bfd_vma sparc64_elf_plt_ptr_offset
52 PARAMS ((bfd_vma, bfd_vma));
53
54 static bfd_boolean sparc64_elf_check_relocs
55 PARAMS ((bfd *, struct bfd_link_info *, asection *sec,
56 const Elf_Internal_Rela *));
57 static bfd_boolean sparc64_elf_adjust_dynamic_symbol
58 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
59 static bfd_boolean sparc64_elf_size_dynamic_sections
60 PARAMS ((bfd *, struct bfd_link_info *));
61 static int sparc64_elf_get_symbol_type
62 PARAMS (( Elf_Internal_Sym *, int));
63 static bfd_boolean sparc64_elf_add_symbol_hook
64 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
65 const char **, flagword *, asection **, bfd_vma *));
66 static bfd_boolean sparc64_elf_output_arch_syms
67 PARAMS ((bfd *, struct bfd_link_info *, PTR,
68 bfd_boolean (*) (PTR, const char *, Elf_Internal_Sym *, asection *)));
69 static void sparc64_elf_symbol_processing
70 PARAMS ((bfd *, asymbol *));
71
72 static bfd_boolean sparc64_elf_merge_private_bfd_data
73 PARAMS ((bfd *, bfd *));
74
75 static bfd_boolean sparc64_elf_fake_sections
76 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
77
78 static const char *sparc64_elf_print_symbol_all
79 PARAMS ((bfd *, PTR, asymbol *));
80 static bfd_boolean sparc64_elf_relax_section
81 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
82 static bfd_boolean sparc64_elf_relocate_section
83 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
84 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
85 static bfd_boolean sparc64_elf_finish_dynamic_symbol
86 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
87 Elf_Internal_Sym *));
88 static bfd_boolean sparc64_elf_finish_dynamic_sections
89 PARAMS ((bfd *, struct bfd_link_info *));
90 static bfd_boolean sparc64_elf_object_p PARAMS ((bfd *));
91 static long sparc64_elf_get_reloc_upper_bound PARAMS ((bfd *, asection *));
92 static long sparc64_elf_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
93 static bfd_boolean sparc64_elf_slurp_one_reloc_table
94 PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, asymbol **, bfd_boolean));
95 static bfd_boolean sparc64_elf_slurp_reloc_table
96 PARAMS ((bfd *, asection *, asymbol **, bfd_boolean));
97 static long sparc64_elf_canonicalize_dynamic_reloc
98 PARAMS ((bfd *, arelent **, asymbol **));
99 static void sparc64_elf_write_relocs PARAMS ((bfd *, asection *, PTR));
100 static enum elf_reloc_type_class sparc64_elf_reloc_type_class
101 PARAMS ((const Elf_Internal_Rela *));
102 \f
103 /* The relocation "howto" table. */
104
105 static bfd_reloc_status_type sparc_elf_notsup_reloc
106 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
107 static bfd_reloc_status_type sparc_elf_wdisp16_reloc
108 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
109 static bfd_reloc_status_type sparc_elf_hix22_reloc
110 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
111 static bfd_reloc_status_type sparc_elf_lox10_reloc
112 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
113
114 static reloc_howto_type sparc64_elf_howto_table[] =
115 {
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_8, 0,0, 8,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", FALSE,0,0x000000ff,TRUE),
118 HOWTO(R_SPARC_16, 0,1,16,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", FALSE,0,0x0000ffff,TRUE),
119 HOWTO(R_SPARC_32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", FALSE,0,0xffffffff,TRUE),
120 HOWTO(R_SPARC_DISP8, 0,0, 8,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", FALSE,0,0x000000ff,TRUE),
121 HOWTO(R_SPARC_DISP16, 0,1,16,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", FALSE,0,0x0000ffff,TRUE),
122 HOWTO(R_SPARC_DISP32, 0,2,32,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", FALSE,0,0xffffffff,TRUE),
123 HOWTO(R_SPARC_WDISP30, 2,2,30,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", FALSE,0,0x3fffffff,TRUE),
124 HOWTO(R_SPARC_WDISP22, 2,2,22,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", FALSE,0,0x003fffff,TRUE),
125 HOWTO(R_SPARC_HI22, 10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", FALSE,0,0x003fffff,TRUE),
126 HOWTO(R_SPARC_22, 0,2,22,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", FALSE,0,0x003fffff,TRUE),
127 HOWTO(R_SPARC_13, 0,2,13,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", FALSE,0,0x00001fff,TRUE),
128 HOWTO(R_SPARC_LO10, 0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", FALSE,0,0x000003ff,TRUE),
129 HOWTO(R_SPARC_GOT10, 0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", FALSE,0,0x000003ff,TRUE),
130 HOWTO(R_SPARC_GOT13, 0,2,13,FALSE,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", FALSE,0,0x00001fff,TRUE),
131 HOWTO(R_SPARC_GOT22, 10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", FALSE,0,0x003fffff,TRUE),
132 HOWTO(R_SPARC_PC10, 0,2,10,TRUE, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", FALSE,0,0x000003ff,TRUE),
133 HOWTO(R_SPARC_PC22, 10,2,22,TRUE, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", FALSE,0,0x003fffff,TRUE),
134 HOWTO(R_SPARC_WPLT30, 2,2,30,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", FALSE,0,0x3fffffff,TRUE),
135 HOWTO(R_SPARC_COPY, 0,0,00,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", FALSE,0,0x00000000,TRUE),
136 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),
137 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),
138 HOWTO(R_SPARC_RELATIVE, 0,0,00,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",FALSE,0,0x00000000,TRUE),
139 HOWTO(R_SPARC_UA32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA32", FALSE,0,0xffffffff,TRUE),
140 #ifndef SPARC64_OLD_RELOCS
141 HOWTO(R_SPARC_PLT32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT32", FALSE,0,0xffffffff,TRUE),
142 /* These aren't implemented yet. */
143 HOWTO(R_SPARC_HIPLT22, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_HIPLT22", FALSE,0,0x00000000,TRUE),
144 HOWTO(R_SPARC_LOPLT10, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_LOPLT10", FALSE,0,0x00000000,TRUE),
145 HOWTO(R_SPARC_PCPLT32, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT32", FALSE,0,0x00000000,TRUE),
146 HOWTO(R_SPARC_PCPLT22, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT22", FALSE,0,0x00000000,TRUE),
147 HOWTO(R_SPARC_PCPLT10, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT10", FALSE,0,0x00000000,TRUE),
148 #endif
149 HOWTO(R_SPARC_10, 0,2,10,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", FALSE,0,0x000003ff,TRUE),
150 HOWTO(R_SPARC_11, 0,2,11,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", FALSE,0,0x000007ff,TRUE),
151 HOWTO(R_SPARC_64, 0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", FALSE,0,MINUS_ONE, TRUE),
152 HOWTO(R_SPARC_OLO10, 0,2,13,FALSE,0,complain_overflow_signed, sparc_elf_notsup_reloc, "R_SPARC_OLO10", FALSE,0,0x00001fff,TRUE),
153 HOWTO(R_SPARC_HH22, 42,2,22,FALSE,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_HH22", FALSE,0,0x003fffff,TRUE),
154 HOWTO(R_SPARC_HM10, 32,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", FALSE,0,0x000003ff,TRUE),
155 HOWTO(R_SPARC_LM22, 10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", FALSE,0,0x003fffff,TRUE),
156 HOWTO(R_SPARC_PC_HH22, 42,2,22,TRUE, 0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_PC_HH22", FALSE,0,0x003fffff,TRUE),
157 HOWTO(R_SPARC_PC_HM10, 32,2,10,TRUE, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_HM10", FALSE,0,0x000003ff,TRUE),
158 HOWTO(R_SPARC_PC_LM22, 10,2,22,TRUE, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_LM22", FALSE,0,0x003fffff,TRUE),
159 HOWTO(R_SPARC_WDISP16, 2,2,16,TRUE, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", FALSE,0,0x00000000,TRUE),
160 HOWTO(R_SPARC_WDISP19, 2,2,19,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", FALSE,0,0x0007ffff,TRUE),
161 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),
162 HOWTO(R_SPARC_7, 0,2, 7,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", FALSE,0,0x0000007f,TRUE),
163 HOWTO(R_SPARC_5, 0,2, 5,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", FALSE,0,0x0000001f,TRUE),
164 HOWTO(R_SPARC_6, 0,2, 6,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", FALSE,0,0x0000003f,TRUE),
165 HOWTO(R_SPARC_DISP64, 0,4,64,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP64", FALSE,0,MINUS_ONE, TRUE),
166 HOWTO(R_SPARC_PLT64, 0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT64", FALSE,0,MINUS_ONE, TRUE),
167 HOWTO(R_SPARC_HIX22, 0,4, 0,FALSE,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_HIX22", FALSE,0,MINUS_ONE, FALSE),
168 HOWTO(R_SPARC_LOX10, 0,4, 0,FALSE,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_LOX10", FALSE,0,MINUS_ONE, FALSE),
169 HOWTO(R_SPARC_H44, 22,2,22,FALSE,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_H44", FALSE,0,0x003fffff,FALSE),
170 HOWTO(R_SPARC_M44, 12,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_M44", FALSE,0,0x000003ff,FALSE),
171 HOWTO(R_SPARC_L44, 0,2,13,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_L44", FALSE,0,0x00000fff,FALSE),
172 HOWTO(R_SPARC_REGISTER, 0,4, 0,FALSE,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",FALSE,0,MINUS_ONE, FALSE),
173 HOWTO(R_SPARC_UA64, 0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA64", FALSE,0,MINUS_ONE, TRUE),
174 HOWTO(R_SPARC_UA16, 0,1,16,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", FALSE,0,0x0000ffff,TRUE)
175 };
176
177 struct elf_reloc_map {
178 bfd_reloc_code_real_type bfd_reloc_val;
179 unsigned char elf_reloc_val;
180 };
181
182 static const struct elf_reloc_map sparc_reloc_map[] =
183 {
184 { BFD_RELOC_NONE, R_SPARC_NONE, },
185 { BFD_RELOC_16, R_SPARC_16, },
186 { BFD_RELOC_16_PCREL, R_SPARC_DISP16 },
187 { BFD_RELOC_8, R_SPARC_8 },
188 { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
189 { BFD_RELOC_CTOR, R_SPARC_64 },
190 { BFD_RELOC_32, R_SPARC_32 },
191 { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
192 { BFD_RELOC_HI22, R_SPARC_HI22 },
193 { BFD_RELOC_LO10, R_SPARC_LO10, },
194 { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
195 { BFD_RELOC_64_PCREL, R_SPARC_DISP64 },
196 { BFD_RELOC_SPARC22, R_SPARC_22 },
197 { BFD_RELOC_SPARC13, R_SPARC_13 },
198 { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
199 { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
200 { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
201 { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
202 { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
203 { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
204 { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
205 { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
206 { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
207 { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
208 { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
209 { BFD_RELOC_SPARC_UA16, R_SPARC_UA16 },
210 { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 },
211 { BFD_RELOC_SPARC_UA64, R_SPARC_UA64 },
212 { BFD_RELOC_SPARC_10, R_SPARC_10 },
213 { BFD_RELOC_SPARC_11, R_SPARC_11 },
214 { BFD_RELOC_SPARC_64, R_SPARC_64 },
215 { BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10 },
216 { BFD_RELOC_SPARC_HH22, R_SPARC_HH22 },
217 { BFD_RELOC_SPARC_HM10, R_SPARC_HM10 },
218 { BFD_RELOC_SPARC_LM22, R_SPARC_LM22 },
219 { BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22 },
220 { BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10 },
221 { BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22 },
222 { BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16 },
223 { BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19 },
224 { BFD_RELOC_SPARC_7, R_SPARC_7 },
225 { BFD_RELOC_SPARC_5, R_SPARC_5 },
226 { BFD_RELOC_SPARC_6, R_SPARC_6 },
227 { BFD_RELOC_SPARC_DISP64, R_SPARC_DISP64 },
228 #ifndef SPARC64_OLD_RELOCS
229 { BFD_RELOC_SPARC_PLT32, R_SPARC_PLT32 },
230 #endif
231 { BFD_RELOC_SPARC_PLT64, R_SPARC_PLT64 },
232 { BFD_RELOC_SPARC_HIX22, R_SPARC_HIX22 },
233 { BFD_RELOC_SPARC_LOX10, R_SPARC_LOX10 },
234 { BFD_RELOC_SPARC_H44, R_SPARC_H44 },
235 { BFD_RELOC_SPARC_M44, R_SPARC_M44 },
236 { BFD_RELOC_SPARC_L44, R_SPARC_L44 },
237 { BFD_RELOC_SPARC_REGISTER, R_SPARC_REGISTER }
238 };
239
240 static reloc_howto_type *
241 sparc64_elf_reloc_type_lookup (abfd, code)
242 bfd *abfd ATTRIBUTE_UNUSED;
243 bfd_reloc_code_real_type code;
244 {
245 unsigned int i;
246 for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++)
247 {
248 if (sparc_reloc_map[i].bfd_reloc_val == code)
249 return &sparc64_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val];
250 }
251 return 0;
252 }
253
254 static void
255 sparc64_elf_info_to_howto (abfd, cache_ptr, dst)
256 bfd *abfd ATTRIBUTE_UNUSED;
257 arelent *cache_ptr;
258 Elf_Internal_Rela *dst;
259 {
260 BFD_ASSERT (ELF64_R_TYPE_ID (dst->r_info) < (unsigned int) R_SPARC_max_std);
261 cache_ptr->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (dst->r_info)];
262 }
263 \f
264 /* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA
265 section can represent up to two relocs, we must tell the user to allocate
266 more space. */
267
268 static long
269 sparc64_elf_get_reloc_upper_bound (abfd, sec)
270 bfd *abfd ATTRIBUTE_UNUSED;
271 asection *sec;
272 {
273 return (sec->reloc_count * 2 + 1) * sizeof (arelent *);
274 }
275
276 static long
277 sparc64_elf_get_dynamic_reloc_upper_bound (abfd)
278 bfd *abfd;
279 {
280 return _bfd_elf_get_dynamic_reloc_upper_bound (abfd) * 2;
281 }
282
283 /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of
284 them. We cannot use generic elf routines for this, because R_SPARC_OLO10
285 has secondary addend in ELF64_R_TYPE_DATA. We handle it as two relocations
286 for the same location, R_SPARC_LO10 and R_SPARC_13. */
287
288 static bfd_boolean
289 sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols, dynamic)
290 bfd *abfd;
291 asection *asect;
292 Elf_Internal_Shdr *rel_hdr;
293 asymbol **symbols;
294 bfd_boolean dynamic;
295 {
296 PTR allocated = NULL;
297 bfd_byte *native_relocs;
298 arelent *relent;
299 unsigned int i;
300 int entsize;
301 bfd_size_type count;
302 arelent *relents;
303
304 allocated = (PTR) bfd_malloc (rel_hdr->sh_size);
305 if (allocated == NULL)
306 goto error_return;
307
308 if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
309 || bfd_bread (allocated, rel_hdr->sh_size, abfd) != rel_hdr->sh_size)
310 goto error_return;
311
312 native_relocs = (bfd_byte *) allocated;
313
314 relents = asect->relocation + asect->reloc_count;
315
316 entsize = rel_hdr->sh_entsize;
317 BFD_ASSERT (entsize == sizeof (Elf64_External_Rela));
318
319 count = rel_hdr->sh_size / entsize;
320
321 for (i = 0, relent = relents; i < count;
322 i++, relent++, native_relocs += entsize)
323 {
324 Elf_Internal_Rela rela;
325
326 bfd_elf64_swap_reloca_in (abfd, native_relocs, &rela);
327
328 /* The address of an ELF reloc is section relative for an object
329 file, and absolute for an executable file or shared library.
330 The address of a normal BFD reloc is always section relative,
331 and the address of a dynamic reloc is absolute.. */
332 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
333 relent->address = rela.r_offset;
334 else
335 relent->address = rela.r_offset - asect->vma;
336
337 if (ELF64_R_SYM (rela.r_info) == 0)
338 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
339 else
340 {
341 asymbol **ps, *s;
342
343 ps = symbols + ELF64_R_SYM (rela.r_info) - 1;
344 s = *ps;
345
346 /* Canonicalize ELF section symbols. FIXME: Why? */
347 if ((s->flags & BSF_SECTION_SYM) == 0)
348 relent->sym_ptr_ptr = ps;
349 else
350 relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
351 }
352
353 relent->addend = rela.r_addend;
354
355 BFD_ASSERT (ELF64_R_TYPE_ID (rela.r_info) < (unsigned int) R_SPARC_max_std);
356 if (ELF64_R_TYPE_ID (rela.r_info) == R_SPARC_OLO10)
357 {
358 relent->howto = &sparc64_elf_howto_table[R_SPARC_LO10];
359 relent[1].address = relent->address;
360 relent++;
361 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
362 relent->addend = ELF64_R_TYPE_DATA (rela.r_info);
363 relent->howto = &sparc64_elf_howto_table[R_SPARC_13];
364 }
365 else
366 relent->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (rela.r_info)];
367 }
368
369 asect->reloc_count += relent - relents;
370
371 if (allocated != NULL)
372 free (allocated);
373
374 return TRUE;
375
376 error_return:
377 if (allocated != NULL)
378 free (allocated);
379 return FALSE;
380 }
381
382 /* Read in and swap the external relocs. */
383
384 static bfd_boolean
385 sparc64_elf_slurp_reloc_table (abfd, asect, symbols, dynamic)
386 bfd *abfd;
387 asection *asect;
388 asymbol **symbols;
389 bfd_boolean dynamic;
390 {
391 struct bfd_elf_section_data * const d = elf_section_data (asect);
392 Elf_Internal_Shdr *rel_hdr;
393 Elf_Internal_Shdr *rel_hdr2;
394 bfd_size_type amt;
395
396 if (asect->relocation != NULL)
397 return TRUE;
398
399 if (! dynamic)
400 {
401 if ((asect->flags & SEC_RELOC) == 0
402 || asect->reloc_count == 0)
403 return TRUE;
404
405 rel_hdr = &d->rel_hdr;
406 rel_hdr2 = d->rel_hdr2;
407
408 BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset
409 || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
410 }
411 else
412 {
413 /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
414 case because relocations against this section may use the
415 dynamic symbol table, and in that case bfd_section_from_shdr
416 in elf.c does not update the RELOC_COUNT. */
417 if (asect->_raw_size == 0)
418 return TRUE;
419
420 rel_hdr = &d->this_hdr;
421 asect->reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
422 rel_hdr2 = NULL;
423 }
424
425 amt = asect->reloc_count;
426 amt *= 2 * sizeof (arelent);
427 asect->relocation = (arelent *) bfd_alloc (abfd, amt);
428 if (asect->relocation == NULL)
429 return FALSE;
430
431 /* The sparc64_elf_slurp_one_reloc_table routine increments reloc_count. */
432 asect->reloc_count = 0;
433
434 if (!sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols,
435 dynamic))
436 return FALSE;
437
438 if (rel_hdr2
439 && !sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols,
440 dynamic))
441 return FALSE;
442
443 return TRUE;
444 }
445
446 /* Canonicalize the dynamic relocation entries. Note that we return
447 the dynamic relocations as a single block, although they are
448 actually associated with particular sections; the interface, which
449 was designed for SunOS style shared libraries, expects that there
450 is only one set of dynamic relocs. Any section that was actually
451 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
452 the dynamic symbol table, is considered to be a dynamic reloc
453 section. */
454
455 static long
456 sparc64_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
457 bfd *abfd;
458 arelent **storage;
459 asymbol **syms;
460 {
461 asection *s;
462 long ret;
463
464 if (elf_dynsymtab (abfd) == 0)
465 {
466 bfd_set_error (bfd_error_invalid_operation);
467 return -1;
468 }
469
470 ret = 0;
471 for (s = abfd->sections; s != NULL; s = s->next)
472 {
473 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
474 && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
475 {
476 arelent *p;
477 long count, i;
478
479 if (! sparc64_elf_slurp_reloc_table (abfd, s, syms, TRUE))
480 return -1;
481 count = s->reloc_count;
482 p = s->relocation;
483 for (i = 0; i < count; i++)
484 *storage++ = p++;
485 ret += count;
486 }
487 }
488
489 *storage = NULL;
490
491 return ret;
492 }
493
494 /* Write out the relocs. */
495
496 static void
497 sparc64_elf_write_relocs (abfd, sec, data)
498 bfd *abfd;
499 asection *sec;
500 PTR data;
501 {
502 bfd_boolean *failedp = (bfd_boolean *) data;
503 Elf_Internal_Shdr *rela_hdr;
504 Elf64_External_Rela *outbound_relocas, *src_rela;
505 unsigned int idx, count;
506 asymbol *last_sym = 0;
507 int last_sym_idx = 0;
508
509 /* If we have already failed, don't do anything. */
510 if (*failedp)
511 return;
512
513 if ((sec->flags & SEC_RELOC) == 0)
514 return;
515
516 /* The linker backend writes the relocs out itself, and sets the
517 reloc_count field to zero to inhibit writing them here. Also,
518 sometimes the SEC_RELOC flag gets set even when there aren't any
519 relocs. */
520 if (sec->reloc_count == 0)
521 return;
522
523 /* We can combine two relocs that refer to the same address
524 into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the
525 latter is R_SPARC_13 with no associated symbol. */
526 count = 0;
527 for (idx = 0; idx < sec->reloc_count; idx++)
528 {
529 bfd_vma addr;
530
531 ++count;
532
533 addr = sec->orelocation[idx]->address;
534 if (sec->orelocation[idx]->howto->type == R_SPARC_LO10
535 && idx < sec->reloc_count - 1)
536 {
537 arelent *r = sec->orelocation[idx + 1];
538
539 if (r->howto->type == R_SPARC_13
540 && r->address == addr
541 && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
542 && (*r->sym_ptr_ptr)->value == 0)
543 ++idx;
544 }
545 }
546
547 rela_hdr = &elf_section_data (sec)->rel_hdr;
548
549 rela_hdr->sh_size = rela_hdr->sh_entsize * count;
550 rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
551 if (rela_hdr->contents == NULL)
552 {
553 *failedp = TRUE;
554 return;
555 }
556
557 /* Figure out whether the relocations are RELA or REL relocations. */
558 if (rela_hdr->sh_type != SHT_RELA)
559 abort ();
560
561 /* orelocation has the data, reloc_count has the count... */
562 outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents;
563 src_rela = outbound_relocas;
564
565 for (idx = 0; idx < sec->reloc_count; idx++)
566 {
567 Elf_Internal_Rela dst_rela;
568 arelent *ptr;
569 asymbol *sym;
570 int n;
571
572 ptr = sec->orelocation[idx];
573
574 /* The address of an ELF reloc is section relative for an object
575 file, and absolute for an executable file or shared library.
576 The address of a BFD reloc is always section relative. */
577 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
578 dst_rela.r_offset = ptr->address;
579 else
580 dst_rela.r_offset = ptr->address + sec->vma;
581
582 sym = *ptr->sym_ptr_ptr;
583 if (sym == last_sym)
584 n = last_sym_idx;
585 else if (bfd_is_abs_section (sym->section) && sym->value == 0)
586 n = STN_UNDEF;
587 else
588 {
589 last_sym = sym;
590 n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
591 if (n < 0)
592 {
593 *failedp = TRUE;
594 return;
595 }
596 last_sym_idx = n;
597 }
598
599 if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
600 && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
601 && ! _bfd_elf_validate_reloc (abfd, ptr))
602 {
603 *failedp = TRUE;
604 return;
605 }
606
607 if (ptr->howto->type == R_SPARC_LO10
608 && idx < sec->reloc_count - 1)
609 {
610 arelent *r = sec->orelocation[idx + 1];
611
612 if (r->howto->type == R_SPARC_13
613 && r->address == ptr->address
614 && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
615 && (*r->sym_ptr_ptr)->value == 0)
616 {
617 idx++;
618 dst_rela.r_info
619 = ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend,
620 R_SPARC_OLO10));
621 }
622 else
623 dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10);
624 }
625 else
626 dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type);
627
628 dst_rela.r_addend = ptr->addend;
629 bfd_elf64_swap_reloca_out (abfd, &dst_rela, (bfd_byte *) src_rela);
630 ++src_rela;
631 }
632 }
633 \f
634 /* Sparc64 ELF linker hash table. */
635
636 struct sparc64_elf_app_reg
637 {
638 unsigned char bind;
639 unsigned short shndx;
640 bfd *abfd;
641 char *name;
642 };
643
644 struct sparc64_elf_link_hash_table
645 {
646 struct elf_link_hash_table root;
647
648 struct sparc64_elf_app_reg app_regs [4];
649 };
650
651 /* Get the Sparc64 ELF linker hash table from a link_info structure. */
652
653 #define sparc64_elf_hash_table(p) \
654 ((struct sparc64_elf_link_hash_table *) ((p)->hash))
655
656 /* Create a Sparc64 ELF linker hash table. */
657
658 static struct bfd_link_hash_table *
659 sparc64_elf_bfd_link_hash_table_create (abfd)
660 bfd *abfd;
661 {
662 struct sparc64_elf_link_hash_table *ret;
663 bfd_size_type amt = sizeof (struct sparc64_elf_link_hash_table);
664
665 ret = (struct sparc64_elf_link_hash_table *) bfd_zmalloc (amt);
666 if (ret == (struct sparc64_elf_link_hash_table *) NULL)
667 return NULL;
668
669 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
670 _bfd_elf_link_hash_newfunc))
671 {
672 free (ret);
673 return NULL;
674 }
675
676 return &ret->root.root;
677 }
678 \f
679 /* Utility for performing the standard initial work of an instruction
680 relocation.
681 *PRELOCATION will contain the relocated item.
682 *PINSN will contain the instruction from the input stream.
683 If the result is `bfd_reloc_other' the caller can continue with
684 performing the relocation. Otherwise it must stop and return the
685 value to its caller. */
686
687 static bfd_reloc_status_type
688 init_insn_reloc (abfd,
689 reloc_entry,
690 symbol,
691 data,
692 input_section,
693 output_bfd,
694 prelocation,
695 pinsn)
696 bfd *abfd;
697 arelent *reloc_entry;
698 asymbol *symbol;
699 PTR data;
700 asection *input_section;
701 bfd *output_bfd;
702 bfd_vma *prelocation;
703 bfd_vma *pinsn;
704 {
705 bfd_vma relocation;
706 reloc_howto_type *howto = reloc_entry->howto;
707
708 if (output_bfd != (bfd *) NULL
709 && (symbol->flags & BSF_SECTION_SYM) == 0
710 && (! howto->partial_inplace
711 || reloc_entry->addend == 0))
712 {
713 reloc_entry->address += input_section->output_offset;
714 return bfd_reloc_ok;
715 }
716
717 /* This works because partial_inplace is FALSE. */
718 if (output_bfd != NULL)
719 return bfd_reloc_continue;
720
721 if (reloc_entry->address > input_section->_cooked_size)
722 return bfd_reloc_outofrange;
723
724 relocation = (symbol->value
725 + symbol->section->output_section->vma
726 + symbol->section->output_offset);
727 relocation += reloc_entry->addend;
728 if (howto->pc_relative)
729 {
730 relocation -= (input_section->output_section->vma
731 + input_section->output_offset);
732 relocation -= reloc_entry->address;
733 }
734
735 *prelocation = relocation;
736 *pinsn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
737 return bfd_reloc_other;
738 }
739
740 /* For unsupported relocs. */
741
742 static bfd_reloc_status_type
743 sparc_elf_notsup_reloc (abfd,
744 reloc_entry,
745 symbol,
746 data,
747 input_section,
748 output_bfd,
749 error_message)
750 bfd *abfd ATTRIBUTE_UNUSED;
751 arelent *reloc_entry ATTRIBUTE_UNUSED;
752 asymbol *symbol ATTRIBUTE_UNUSED;
753 PTR data ATTRIBUTE_UNUSED;
754 asection *input_section ATTRIBUTE_UNUSED;
755 bfd *output_bfd ATTRIBUTE_UNUSED;
756 char **error_message ATTRIBUTE_UNUSED;
757 {
758 return bfd_reloc_notsupported;
759 }
760
761 /* Handle the WDISP16 reloc. */
762
763 static bfd_reloc_status_type
764 sparc_elf_wdisp16_reloc (abfd, reloc_entry, symbol, data, input_section,
765 output_bfd, error_message)
766 bfd *abfd;
767 arelent *reloc_entry;
768 asymbol *symbol;
769 PTR data;
770 asection *input_section;
771 bfd *output_bfd;
772 char **error_message ATTRIBUTE_UNUSED;
773 {
774 bfd_vma relocation;
775 bfd_vma insn;
776 bfd_reloc_status_type status;
777
778 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
779 input_section, output_bfd, &relocation, &insn);
780 if (status != bfd_reloc_other)
781 return status;
782
783 insn &= ~ (bfd_vma) 0x303fff;
784 insn |= (((relocation >> 2) & 0xc000) << 6) | ((relocation >> 2) & 0x3fff);
785 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
786
787 if ((bfd_signed_vma) relocation < - 0x40000
788 || (bfd_signed_vma) relocation > 0x3ffff)
789 return bfd_reloc_overflow;
790 else
791 return bfd_reloc_ok;
792 }
793
794 /* Handle the HIX22 reloc. */
795
796 static bfd_reloc_status_type
797 sparc_elf_hix22_reloc (abfd,
798 reloc_entry,
799 symbol,
800 data,
801 input_section,
802 output_bfd,
803 error_message)
804 bfd *abfd;
805 arelent *reloc_entry;
806 asymbol *symbol;
807 PTR data;
808 asection *input_section;
809 bfd *output_bfd;
810 char **error_message ATTRIBUTE_UNUSED;
811 {
812 bfd_vma relocation;
813 bfd_vma insn;
814 bfd_reloc_status_type status;
815
816 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
817 input_section, output_bfd, &relocation, &insn);
818 if (status != bfd_reloc_other)
819 return status;
820
821 relocation ^= MINUS_ONE;
822 insn = (insn &~ (bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff);
823 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
824
825 if ((relocation & ~ (bfd_vma) 0xffffffff) != 0)
826 return bfd_reloc_overflow;
827 else
828 return bfd_reloc_ok;
829 }
830
831 /* Handle the LOX10 reloc. */
832
833 static bfd_reloc_status_type
834 sparc_elf_lox10_reloc (abfd,
835 reloc_entry,
836 symbol,
837 data,
838 input_section,
839 output_bfd,
840 error_message)
841 bfd *abfd;
842 arelent *reloc_entry;
843 asymbol *symbol;
844 PTR data;
845 asection *input_section;
846 bfd *output_bfd;
847 char **error_message ATTRIBUTE_UNUSED;
848 {
849 bfd_vma relocation;
850 bfd_vma insn;
851 bfd_reloc_status_type status;
852
853 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
854 input_section, output_bfd, &relocation, &insn);
855 if (status != bfd_reloc_other)
856 return status;
857
858 insn = (insn &~ (bfd_vma) 0x1fff) | 0x1c00 | (relocation & 0x3ff);
859 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
860
861 return bfd_reloc_ok;
862 }
863 \f
864 /* PLT/GOT stuff */
865
866 /* Both the headers and the entries are icache aligned. */
867 #define PLT_ENTRY_SIZE 32
868 #define PLT_HEADER_SIZE (4 * PLT_ENTRY_SIZE)
869 #define LARGE_PLT_THRESHOLD 32768
870 #define GOT_RESERVED_ENTRIES 1
871
872 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1"
873
874 /* Fill in the .plt section. */
875
876 static void
877 sparc64_elf_build_plt (output_bfd, contents, nentries)
878 bfd *output_bfd;
879 unsigned char *contents;
880 int nentries;
881 {
882 const unsigned int nop = 0x01000000;
883 int i, j;
884
885 /* The first four entries are reserved, and are initially undefined.
886 We fill them with `illtrap 0' to force ld.so to do something. */
887
888 for (i = 0; i < PLT_HEADER_SIZE/4; ++i)
889 bfd_put_32 (output_bfd, (bfd_vma) 0, contents+i*4);
890
891 /* The first 32768 entries are close enough to plt1 to get there via
892 a straight branch. */
893
894 for (i = 4; i < LARGE_PLT_THRESHOLD && i < nentries; ++i)
895 {
896 unsigned char *entry = contents + i * PLT_ENTRY_SIZE;
897 unsigned int sethi, ba;
898
899 /* sethi (. - plt0), %g1 */
900 sethi = 0x03000000 | (i * PLT_ENTRY_SIZE);
901
902 /* ba,a,pt %xcc, plt1 */
903 ba = 0x30680000 | (((contents+PLT_ENTRY_SIZE) - (entry+4)) / 4 & 0x7ffff);
904
905 bfd_put_32 (output_bfd, (bfd_vma) sethi, entry);
906 bfd_put_32 (output_bfd, (bfd_vma) ba, entry + 4);
907 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 8);
908 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 12);
909 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 16);
910 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 20);
911 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 24);
912 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 28);
913 }
914
915 /* Now the tricky bit. Entries 32768 and higher are grouped in blocks of
916 160: 160 entries and 160 pointers. This is to separate code from data,
917 which is much friendlier on the cache. */
918
919 for (; i < nentries; i += 160)
920 {
921 int block = (i + 160 <= nentries ? 160 : nentries - i);
922 for (j = 0; j < block; ++j)
923 {
924 unsigned char *entry, *ptr;
925 unsigned int ldx;
926
927 entry = contents + i*PLT_ENTRY_SIZE + j*4*6;
928 ptr = contents + i*PLT_ENTRY_SIZE + block*4*6 + j*8;
929
930 /* ldx [%o7 + ptr - (entry+4)], %g1 */
931 ldx = 0xc25be000 | ((ptr - (entry+4)) & 0x1fff);
932
933 /* mov %o7,%g5
934 call .+8
935 nop
936 ldx [%o7+P],%g1
937 jmpl %o7+%g1,%g1
938 mov %g5,%o7 */
939 bfd_put_32 (output_bfd, (bfd_vma) 0x8a10000f, entry);
940 bfd_put_32 (output_bfd, (bfd_vma) 0x40000002, entry + 4);
941 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 8);
942 bfd_put_32 (output_bfd, (bfd_vma) ldx, entry + 12);
943 bfd_put_32 (output_bfd, (bfd_vma) 0x83c3c001, entry + 16);
944 bfd_put_32 (output_bfd, (bfd_vma) 0x9e100005, entry + 20);
945
946 bfd_put_64 (output_bfd, (bfd_vma) (contents - (entry + 4)), ptr);
947 }
948 }
949 }
950
951 /* Return the offset of a particular plt entry within the .plt section. */
952
953 static bfd_vma
954 sparc64_elf_plt_entry_offset (index)
955 bfd_vma index;
956 {
957 bfd_vma block, ofs;
958
959 if (index < LARGE_PLT_THRESHOLD)
960 return index * PLT_ENTRY_SIZE;
961
962 /* See above for details. */
963
964 block = (index - LARGE_PLT_THRESHOLD) / 160;
965 ofs = (index - LARGE_PLT_THRESHOLD) % 160;
966
967 return (LARGE_PLT_THRESHOLD + block * 160) * PLT_ENTRY_SIZE + ofs * 6 * 4;
968 }
969
970 static bfd_vma
971 sparc64_elf_plt_ptr_offset (index, max)
972 bfd_vma index;
973 bfd_vma max;
974 {
975 bfd_vma block, ofs, last;
976
977 BFD_ASSERT(index >= LARGE_PLT_THRESHOLD);
978
979 /* See above for details. */
980
981 block = (((index - LARGE_PLT_THRESHOLD) / 160) * 160) + LARGE_PLT_THRESHOLD;
982 ofs = index - block;
983 if (block + 160 > max)
984 last = (max - LARGE_PLT_THRESHOLD) % 160;
985 else
986 last = 160;
987
988 return (block * PLT_ENTRY_SIZE
989 + last * 6*4
990 + ofs * 8);
991 }
992 \f
993 /* Look through the relocs for a section during the first phase, and
994 allocate space in the global offset table or procedure linkage
995 table. */
996
997 static bfd_boolean
998 sparc64_elf_check_relocs (abfd, info, sec, relocs)
999 bfd *abfd;
1000 struct bfd_link_info *info;
1001 asection *sec;
1002 const Elf_Internal_Rela *relocs;
1003 {
1004 bfd *dynobj;
1005 Elf_Internal_Shdr *symtab_hdr;
1006 struct elf_link_hash_entry **sym_hashes;
1007 bfd_vma *local_got_offsets;
1008 const Elf_Internal_Rela *rel;
1009 const Elf_Internal_Rela *rel_end;
1010 asection *sgot;
1011 asection *srelgot;
1012 asection *sreloc;
1013
1014 if (info->relocateable || !(sec->flags & SEC_ALLOC))
1015 return TRUE;
1016
1017 dynobj = elf_hash_table (info)->dynobj;
1018 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1019 sym_hashes = elf_sym_hashes (abfd);
1020 local_got_offsets = elf_local_got_offsets (abfd);
1021
1022 sgot = NULL;
1023 srelgot = NULL;
1024 sreloc = NULL;
1025
1026 rel_end = relocs + NUM_SHDR_ENTRIES (& elf_section_data (sec)->rel_hdr);
1027 for (rel = relocs; rel < rel_end; rel++)
1028 {
1029 unsigned long r_symndx;
1030 struct elf_link_hash_entry *h;
1031
1032 r_symndx = ELF64_R_SYM (rel->r_info);
1033 if (r_symndx < symtab_hdr->sh_info)
1034 h = NULL;
1035 else
1036 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1037
1038 switch (ELF64_R_TYPE_ID (rel->r_info))
1039 {
1040 case R_SPARC_GOT10:
1041 case R_SPARC_GOT13:
1042 case R_SPARC_GOT22:
1043 /* This symbol requires a global offset table entry. */
1044
1045 if (dynobj == NULL)
1046 {
1047 /* Create the .got section. */
1048 elf_hash_table (info)->dynobj = dynobj = abfd;
1049 if (! _bfd_elf_create_got_section (dynobj, info))
1050 return FALSE;
1051 }
1052
1053 if (sgot == NULL)
1054 {
1055 sgot = bfd_get_section_by_name (dynobj, ".got");
1056 BFD_ASSERT (sgot != NULL);
1057 }
1058
1059 if (srelgot == NULL && (h != NULL || info->shared))
1060 {
1061 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1062 if (srelgot == NULL)
1063 {
1064 srelgot = bfd_make_section (dynobj, ".rela.got");
1065 if (srelgot == NULL
1066 || ! bfd_set_section_flags (dynobj, srelgot,
1067 (SEC_ALLOC
1068 | SEC_LOAD
1069 | SEC_HAS_CONTENTS
1070 | SEC_IN_MEMORY
1071 | SEC_LINKER_CREATED
1072 | SEC_READONLY))
1073 || ! bfd_set_section_alignment (dynobj, srelgot, 3))
1074 return FALSE;
1075 }
1076 }
1077
1078 if (h != NULL)
1079 {
1080 if (h->got.offset != (bfd_vma) -1)
1081 {
1082 /* We have already allocated space in the .got. */
1083 break;
1084 }
1085 h->got.offset = sgot->_raw_size;
1086
1087 /* Make sure this symbol is output as a dynamic symbol. */
1088 if (h->dynindx == -1)
1089 {
1090 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1091 return FALSE;
1092 }
1093
1094 srelgot->_raw_size += sizeof (Elf64_External_Rela);
1095 }
1096 else
1097 {
1098 /* This is a global offset table entry for a local
1099 symbol. */
1100 if (local_got_offsets == NULL)
1101 {
1102 bfd_size_type size;
1103 register unsigned int i;
1104
1105 size = symtab_hdr->sh_info;
1106 size *= sizeof (bfd_vma);
1107 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
1108 if (local_got_offsets == NULL)
1109 return FALSE;
1110 elf_local_got_offsets (abfd) = local_got_offsets;
1111 for (i = 0; i < symtab_hdr->sh_info; i++)
1112 local_got_offsets[i] = (bfd_vma) -1;
1113 }
1114 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
1115 {
1116 /* We have already allocated space in the .got. */
1117 break;
1118 }
1119 local_got_offsets[r_symndx] = sgot->_raw_size;
1120
1121 if (info->shared)
1122 {
1123 /* If we are generating a shared object, we need to
1124 output a R_SPARC_RELATIVE reloc so that the
1125 dynamic linker can adjust this GOT entry. */
1126 srelgot->_raw_size += sizeof (Elf64_External_Rela);
1127 }
1128 }
1129
1130 sgot->_raw_size += 8;
1131
1132 #if 0
1133 /* Doesn't work for 64-bit -fPIC, since sethi/or builds
1134 unsigned numbers. If we permit ourselves to modify
1135 code so we get sethi/xor, this could work.
1136 Question: do we consider conditionally re-enabling
1137 this for -fpic, once we know about object code models? */
1138 /* If the .got section is more than 0x1000 bytes, we add
1139 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13
1140 bit relocations have a greater chance of working. */
1141 if (sgot->_raw_size >= 0x1000
1142 && elf_hash_table (info)->hgot->root.u.def.value == 0)
1143 elf_hash_table (info)->hgot->root.u.def.value = 0x1000;
1144 #endif
1145
1146 break;
1147
1148 case R_SPARC_WPLT30:
1149 case R_SPARC_PLT32:
1150 case R_SPARC_HIPLT22:
1151 case R_SPARC_LOPLT10:
1152 case R_SPARC_PCPLT32:
1153 case R_SPARC_PCPLT22:
1154 case R_SPARC_PCPLT10:
1155 case R_SPARC_PLT64:
1156 /* This symbol requires a procedure linkage table entry. We
1157 actually build the entry in adjust_dynamic_symbol,
1158 because this might be a case of linking PIC code without
1159 linking in any dynamic objects, in which case we don't
1160 need to generate a procedure linkage table after all. */
1161
1162 if (h == NULL)
1163 {
1164 /* It does not make sense to have a procedure linkage
1165 table entry for a local symbol. */
1166 bfd_set_error (bfd_error_bad_value);
1167 return FALSE;
1168 }
1169
1170 /* Make sure this symbol is output as a dynamic symbol. */
1171 if (h->dynindx == -1)
1172 {
1173 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1174 return FALSE;
1175 }
1176
1177 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1178 if (ELF64_R_TYPE_ID (rel->r_info) != R_SPARC_PLT32
1179 && ELF64_R_TYPE_ID (rel->r_info) != R_SPARC_PLT64)
1180 break;
1181 /* Fall through. */
1182 case R_SPARC_PC10:
1183 case R_SPARC_PC22:
1184 case R_SPARC_PC_HH22:
1185 case R_SPARC_PC_HM10:
1186 case R_SPARC_PC_LM22:
1187 if (h != NULL
1188 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1189 break;
1190 /* Fall through. */
1191 case R_SPARC_DISP8:
1192 case R_SPARC_DISP16:
1193 case R_SPARC_DISP32:
1194 case R_SPARC_DISP64:
1195 case R_SPARC_WDISP30:
1196 case R_SPARC_WDISP22:
1197 case R_SPARC_WDISP19:
1198 case R_SPARC_WDISP16:
1199 if (h == NULL)
1200 break;
1201 /* Fall through. */
1202 case R_SPARC_8:
1203 case R_SPARC_16:
1204 case R_SPARC_32:
1205 case R_SPARC_HI22:
1206 case R_SPARC_22:
1207 case R_SPARC_13:
1208 case R_SPARC_LO10:
1209 case R_SPARC_UA32:
1210 case R_SPARC_10:
1211 case R_SPARC_11:
1212 case R_SPARC_64:
1213 case R_SPARC_OLO10:
1214 case R_SPARC_HH22:
1215 case R_SPARC_HM10:
1216 case R_SPARC_LM22:
1217 case R_SPARC_7:
1218 case R_SPARC_5:
1219 case R_SPARC_6:
1220 case R_SPARC_HIX22:
1221 case R_SPARC_LOX10:
1222 case R_SPARC_H44:
1223 case R_SPARC_M44:
1224 case R_SPARC_L44:
1225 case R_SPARC_UA64:
1226 case R_SPARC_UA16:
1227 /* When creating a shared object, we must copy these relocs
1228 into the output file. We create a reloc section in
1229 dynobj and make room for the reloc.
1230
1231 But don't do this for debugging sections -- this shows up
1232 with DWARF2 -- first because they are not loaded, and
1233 second because DWARF sez the debug info is not to be
1234 biased by the load address. */
1235 if (info->shared && (sec->flags & SEC_ALLOC))
1236 {
1237 if (sreloc == NULL)
1238 {
1239 const char *name;
1240
1241 name = (bfd_elf_string_from_elf_section
1242 (abfd,
1243 elf_elfheader (abfd)->e_shstrndx,
1244 elf_section_data (sec)->rel_hdr.sh_name));
1245 if (name == NULL)
1246 return FALSE;
1247
1248 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1249 && strcmp (bfd_get_section_name (abfd, sec),
1250 name + 5) == 0);
1251
1252 sreloc = bfd_get_section_by_name (dynobj, name);
1253 if (sreloc == NULL)
1254 {
1255 flagword flags;
1256
1257 sreloc = bfd_make_section (dynobj, name);
1258 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1259 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1260 if ((sec->flags & SEC_ALLOC) != 0)
1261 flags |= SEC_ALLOC | SEC_LOAD;
1262 if (sreloc == NULL
1263 || ! bfd_set_section_flags (dynobj, sreloc, flags)
1264 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1265 return FALSE;
1266 }
1267 if (sec->flags & SEC_READONLY)
1268 info->flags |= DF_TEXTREL;
1269 }
1270
1271 sreloc->_raw_size += sizeof (Elf64_External_Rela);
1272 }
1273 break;
1274
1275 case R_SPARC_REGISTER:
1276 /* Nothing to do. */
1277 break;
1278
1279 default:
1280 (*_bfd_error_handler) (_("%s: check_relocs: unhandled reloc type %d"),
1281 bfd_archive_filename (abfd),
1282 ELF64_R_TYPE_ID (rel->r_info));
1283 return FALSE;
1284 }
1285 }
1286
1287 return TRUE;
1288 }
1289
1290 /* Hook called by the linker routine which adds symbols from an object
1291 file. We use it for STT_REGISTER symbols. */
1292
1293 static bfd_boolean
1294 sparc64_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
1295 bfd *abfd;
1296 struct bfd_link_info *info;
1297 const Elf_Internal_Sym *sym;
1298 const char **namep;
1299 flagword *flagsp ATTRIBUTE_UNUSED;
1300 asection **secp ATTRIBUTE_UNUSED;
1301 bfd_vma *valp ATTRIBUTE_UNUSED;
1302 {
1303 static const char *const stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" };
1304
1305 if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER)
1306 {
1307 int reg;
1308 struct sparc64_elf_app_reg *p;
1309
1310 reg = (int)sym->st_value;
1311 switch (reg & ~1)
1312 {
1313 case 2: reg -= 2; break;
1314 case 6: reg -= 4; break;
1315 default:
1316 (*_bfd_error_handler)
1317 (_("%s: Only registers %%g[2367] can be declared using STT_REGISTER"),
1318 bfd_archive_filename (abfd));
1319 return FALSE;
1320 }
1321
1322 if (info->hash->creator != abfd->xvec
1323 || (abfd->flags & DYNAMIC) != 0)
1324 {
1325 /* STT_REGISTER only works when linking an elf64_sparc object.
1326 If STT_REGISTER comes from a dynamic object, don't put it into
1327 the output bfd. The dynamic linker will recheck it. */
1328 *namep = NULL;
1329 return TRUE;
1330 }
1331
1332 p = sparc64_elf_hash_table(info)->app_regs + reg;
1333
1334 if (p->name != NULL && strcmp (p->name, *namep))
1335 {
1336 (*_bfd_error_handler)
1337 (_("Register %%g%d used incompatibly: %s in %s, previously %s in %s"),
1338 (int) sym->st_value,
1339 **namep ? *namep : "#scratch", bfd_archive_filename (abfd),
1340 *p->name ? p->name : "#scratch", bfd_archive_filename (p->abfd));
1341 return FALSE;
1342 }
1343
1344 if (p->name == NULL)
1345 {
1346 if (**namep)
1347 {
1348 struct elf_link_hash_entry *h;
1349
1350 h = (struct elf_link_hash_entry *)
1351 bfd_link_hash_lookup (info->hash, *namep, FALSE, FALSE, FALSE);
1352
1353 if (h != NULL)
1354 {
1355 unsigned char type = h->type;
1356
1357 if (type > STT_FUNC)
1358 type = 0;
1359 (*_bfd_error_handler)
1360 (_("Symbol `%s' has differing types: REGISTER in %s, previously %s in %s"),
1361 *namep, bfd_archive_filename (abfd),
1362 stt_types[type], bfd_archive_filename (p->abfd));
1363 return FALSE;
1364 }
1365
1366 p->name = bfd_hash_allocate (&info->hash->table,
1367 strlen (*namep) + 1);
1368 if (!p->name)
1369 return FALSE;
1370
1371 strcpy (p->name, *namep);
1372 }
1373 else
1374 p->name = "";
1375 p->bind = ELF_ST_BIND (sym->st_info);
1376 p->abfd = abfd;
1377 p->shndx = sym->st_shndx;
1378 }
1379 else
1380 {
1381 if (p->bind == STB_WEAK
1382 && ELF_ST_BIND (sym->st_info) == STB_GLOBAL)
1383 {
1384 p->bind = STB_GLOBAL;
1385 p->abfd = abfd;
1386 }
1387 }
1388 *namep = NULL;
1389 return TRUE;
1390 }
1391 else if (*namep && **namep
1392 && info->hash->creator == abfd->xvec)
1393 {
1394 int i;
1395 struct sparc64_elf_app_reg *p;
1396
1397 p = sparc64_elf_hash_table(info)->app_regs;
1398 for (i = 0; i < 4; i++, p++)
1399 if (p->name != NULL && ! strcmp (p->name, *namep))
1400 {
1401 unsigned char type = ELF_ST_TYPE (sym->st_info);
1402
1403 if (type > STT_FUNC)
1404 type = 0;
1405 (*_bfd_error_handler)
1406 (_("Symbol `%s' has differing types: %s in %s, previously REGISTER in %s"),
1407 *namep, stt_types[type], bfd_archive_filename (abfd),
1408 bfd_archive_filename (p->abfd));
1409 return FALSE;
1410 }
1411 }
1412 return TRUE;
1413 }
1414
1415 /* This function takes care of emiting STT_REGISTER symbols
1416 which we cannot easily keep in the symbol hash table. */
1417
1418 static bfd_boolean
1419 sparc64_elf_output_arch_syms (output_bfd, info, finfo, func)
1420 bfd *output_bfd ATTRIBUTE_UNUSED;
1421 struct bfd_link_info *info;
1422 PTR finfo;
1423 bfd_boolean (*func)
1424 PARAMS ((PTR, const char *, Elf_Internal_Sym *, asection *));
1425 {
1426 int reg;
1427 struct sparc64_elf_app_reg *app_regs =
1428 sparc64_elf_hash_table(info)->app_regs;
1429 Elf_Internal_Sym sym;
1430
1431 /* We arranged in size_dynamic_sections to put the STT_REGISTER entries
1432 at the end of the dynlocal list, so they came at the end of the local
1433 symbols in the symtab. Except that they aren't STB_LOCAL, so we need
1434 to back up symtab->sh_info. */
1435 if (elf_hash_table (info)->dynlocal)
1436 {
1437 bfd * dynobj = elf_hash_table (info)->dynobj;
1438 asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym");
1439 struct elf_link_local_dynamic_entry *e;
1440
1441 for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
1442 if (e->input_indx == -1)
1443 break;
1444 if (e)
1445 {
1446 elf_section_data (dynsymsec->output_section)->this_hdr.sh_info
1447 = e->dynindx;
1448 }
1449 }
1450
1451 if (info->strip == strip_all)
1452 return TRUE;
1453
1454 for (reg = 0; reg < 4; reg++)
1455 if (app_regs [reg].name != NULL)
1456 {
1457 if (info->strip == strip_some
1458 && bfd_hash_lookup (info->keep_hash,
1459 app_regs [reg].name,
1460 FALSE, FALSE) == NULL)
1461 continue;
1462
1463 sym.st_value = reg < 2 ? reg + 2 : reg + 4;
1464 sym.st_size = 0;
1465 sym.st_other = 0;
1466 sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER);
1467 sym.st_shndx = app_regs [reg].shndx;
1468 if (! (*func) (finfo, app_regs [reg].name, &sym,
1469 sym.st_shndx == SHN_ABS
1470 ? bfd_abs_section_ptr : bfd_und_section_ptr))
1471 return FALSE;
1472 }
1473
1474 return TRUE;
1475 }
1476
1477 static int
1478 sparc64_elf_get_symbol_type (elf_sym, type)
1479 Elf_Internal_Sym * elf_sym;
1480 int type;
1481 {
1482 if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER)
1483 return STT_REGISTER;
1484 else
1485 return type;
1486 }
1487
1488 /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL
1489 even in SHN_UNDEF section. */
1490
1491 static void
1492 sparc64_elf_symbol_processing (abfd, asym)
1493 bfd *abfd ATTRIBUTE_UNUSED;
1494 asymbol *asym;
1495 {
1496 elf_symbol_type *elfsym;
1497
1498 elfsym = (elf_symbol_type *) asym;
1499 if (elfsym->internal_elf_sym.st_info
1500 == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER))
1501 {
1502 asym->flags |= BSF_GLOBAL;
1503 }
1504 }
1505
1506 /* Adjust a symbol defined by a dynamic object and referenced by a
1507 regular object. The current definition is in some section of the
1508 dynamic object, but we're not including those sections. We have to
1509 change the definition to something the rest of the link can
1510 understand. */
1511
1512 static bfd_boolean
1513 sparc64_elf_adjust_dynamic_symbol (info, h)
1514 struct bfd_link_info *info;
1515 struct elf_link_hash_entry *h;
1516 {
1517 bfd *dynobj;
1518 asection *s;
1519 unsigned int power_of_two;
1520
1521 dynobj = elf_hash_table (info)->dynobj;
1522
1523 /* Make sure we know what is going on here. */
1524 BFD_ASSERT (dynobj != NULL
1525 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
1526 || h->weakdef != NULL
1527 || ((h->elf_link_hash_flags
1528 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1529 && (h->elf_link_hash_flags
1530 & ELF_LINK_HASH_REF_REGULAR) != 0
1531 && (h->elf_link_hash_flags
1532 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
1533
1534 /* If this is a function, put it in the procedure linkage table. We
1535 will fill in the contents of the procedure linkage table later
1536 (although we could actually do it here). The STT_NOTYPE
1537 condition is a hack specifically for the Oracle libraries
1538 delivered for Solaris; for some inexplicable reason, they define
1539 some of their functions as STT_NOTYPE when they really should be
1540 STT_FUNC. */
1541 if (h->type == STT_FUNC
1542 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
1543 || (h->type == STT_NOTYPE
1544 && (h->root.type == bfd_link_hash_defined
1545 || h->root.type == bfd_link_hash_defweak)
1546 && (h->root.u.def.section->flags & SEC_CODE) != 0))
1547 {
1548 if (! elf_hash_table (info)->dynamic_sections_created)
1549 {
1550 /* This case can occur if we saw a WPLT30 reloc in an input
1551 file, but none of the input files were dynamic objects.
1552 In such a case, we don't actually need to build a
1553 procedure linkage table, and we can just do a WDISP30
1554 reloc instead. */
1555 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
1556 return TRUE;
1557 }
1558
1559 s = bfd_get_section_by_name (dynobj, ".plt");
1560 BFD_ASSERT (s != NULL);
1561
1562 /* The first four bit in .plt is reserved. */
1563 if (s->_raw_size == 0)
1564 s->_raw_size = PLT_HEADER_SIZE;
1565
1566 /* To simplify matters later, just store the plt index here. */
1567 h->plt.offset = s->_raw_size / PLT_ENTRY_SIZE;
1568
1569 /* If this symbol is not defined in a regular file, and we are
1570 not generating a shared library, then set the symbol to this
1571 location in the .plt. This is required to make function
1572 pointers compare as equal between the normal executable and
1573 the shared library. */
1574 if (! info->shared
1575 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1576 {
1577 h->root.u.def.section = s;
1578 h->root.u.def.value = sparc64_elf_plt_entry_offset (h->plt.offset);
1579 }
1580
1581 /* Make room for this entry. */
1582 s->_raw_size += PLT_ENTRY_SIZE;
1583
1584 /* We also need to make an entry in the .rela.plt section. */
1585
1586 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1587 BFD_ASSERT (s != NULL);
1588
1589 s->_raw_size += sizeof (Elf64_External_Rela);
1590
1591 /* The procedure linkage table size is bounded by the magnitude
1592 of the offset we can describe in the entry. */
1593 if (s->_raw_size >= (bfd_vma)1 << 32)
1594 {
1595 bfd_set_error (bfd_error_bad_value);
1596 return FALSE;
1597 }
1598
1599 return TRUE;
1600 }
1601
1602 /* If this is a weak symbol, and there is a real definition, the
1603 processor independent code will have arranged for us to see the
1604 real definition first, and we can just use the same value. */
1605 if (h->weakdef != NULL)
1606 {
1607 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1608 || h->weakdef->root.type == bfd_link_hash_defweak);
1609 h->root.u.def.section = h->weakdef->root.u.def.section;
1610 h->root.u.def.value = h->weakdef->root.u.def.value;
1611 return TRUE;
1612 }
1613
1614 /* This is a reference to a symbol defined by a dynamic object which
1615 is not a function. */
1616
1617 /* If we are creating a shared library, we must presume that the
1618 only references to the symbol are via the global offset table.
1619 For such cases we need not do anything here; the relocations will
1620 be handled correctly by relocate_section. */
1621 if (info->shared)
1622 return TRUE;
1623
1624 /* We must allocate the symbol in our .dynbss section, which will
1625 become part of the .bss section of the executable. There will be
1626 an entry for this symbol in the .dynsym section. The dynamic
1627 object will contain position independent code, so all references
1628 from the dynamic object to this symbol will go through the global
1629 offset table. The dynamic linker will use the .dynsym entry to
1630 determine the address it must put in the global offset table, so
1631 both the dynamic object and the regular object will refer to the
1632 same memory location for the variable. */
1633
1634 s = bfd_get_section_by_name (dynobj, ".dynbss");
1635 BFD_ASSERT (s != NULL);
1636
1637 /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker
1638 to copy the initial value out of the dynamic object and into the
1639 runtime process image. We need to remember the offset into the
1640 .rel.bss section we are going to use. */
1641 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1642 {
1643 asection *srel;
1644
1645 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1646 BFD_ASSERT (srel != NULL);
1647 srel->_raw_size += sizeof (Elf64_External_Rela);
1648 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1649 }
1650
1651 /* We need to figure out the alignment required for this symbol. I
1652 have no idea how ELF linkers handle this. 16-bytes is the size
1653 of the largest type that requires hard alignment -- long double. */
1654 power_of_two = bfd_log2 (h->size);
1655 if (power_of_two > 4)
1656 power_of_two = 4;
1657
1658 /* Apply the required alignment. */
1659 s->_raw_size = BFD_ALIGN (s->_raw_size,
1660 (bfd_size_type) (1 << power_of_two));
1661 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1662 {
1663 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
1664 return FALSE;
1665 }
1666
1667 /* Define the symbol as being at this point in the section. */
1668 h->root.u.def.section = s;
1669 h->root.u.def.value = s->_raw_size;
1670
1671 /* Increment the section size to make room for the symbol. */
1672 s->_raw_size += h->size;
1673
1674 return TRUE;
1675 }
1676
1677 /* Set the sizes of the dynamic sections. */
1678
1679 static bfd_boolean
1680 sparc64_elf_size_dynamic_sections (output_bfd, info)
1681 bfd *output_bfd;
1682 struct bfd_link_info *info;
1683 {
1684 bfd *dynobj;
1685 asection *s;
1686 bfd_boolean relplt;
1687
1688 dynobj = elf_hash_table (info)->dynobj;
1689 BFD_ASSERT (dynobj != NULL);
1690
1691 if (elf_hash_table (info)->dynamic_sections_created)
1692 {
1693 /* Set the contents of the .interp section to the interpreter. */
1694 if (! info->shared)
1695 {
1696 s = bfd_get_section_by_name (dynobj, ".interp");
1697 BFD_ASSERT (s != NULL);
1698 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1699 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1700 }
1701 }
1702 else
1703 {
1704 /* We may have created entries in the .rela.got section.
1705 However, if we are not creating the dynamic sections, we will
1706 not actually use these entries. Reset the size of .rela.got,
1707 which will cause it to get stripped from the output file
1708 below. */
1709 s = bfd_get_section_by_name (dynobj, ".rela.got");
1710 if (s != NULL)
1711 s->_raw_size = 0;
1712 }
1713
1714 /* The check_relocs and adjust_dynamic_symbol entry points have
1715 determined the sizes of the various dynamic sections. Allocate
1716 memory for them. */
1717 relplt = FALSE;
1718 for (s = dynobj->sections; s != NULL; s = s->next)
1719 {
1720 const char *name;
1721 bfd_boolean strip;
1722
1723 if ((s->flags & SEC_LINKER_CREATED) == 0)
1724 continue;
1725
1726 /* It's OK to base decisions on the section name, because none
1727 of the dynobj section names depend upon the input files. */
1728 name = bfd_get_section_name (dynobj, s);
1729
1730 strip = FALSE;
1731
1732 if (strncmp (name, ".rela", 5) == 0)
1733 {
1734 if (s->_raw_size == 0)
1735 {
1736 /* If we don't need this section, strip it from the
1737 output file. This is to handle .rela.bss and
1738 .rel.plt. We must create it in
1739 create_dynamic_sections, because it must be created
1740 before the linker maps input sections to output
1741 sections. The linker does that before
1742 adjust_dynamic_symbol is called, and it is that
1743 function which decides whether anything needs to go
1744 into these sections. */
1745 strip = TRUE;
1746 }
1747 else
1748 {
1749 if (strcmp (name, ".rela.plt") == 0)
1750 relplt = TRUE;
1751
1752 /* We use the reloc_count field as a counter if we need
1753 to copy relocs into the output file. */
1754 s->reloc_count = 0;
1755 }
1756 }
1757 else if (strcmp (name, ".plt") != 0
1758 && strncmp (name, ".got", 4) != 0)
1759 {
1760 /* It's not one of our sections, so don't allocate space. */
1761 continue;
1762 }
1763
1764 if (strip)
1765 {
1766 _bfd_strip_section_from_output (info, s);
1767 continue;
1768 }
1769
1770 /* Allocate memory for the section contents. Zero the memory
1771 for the benefit of .rela.plt, which has 4 unused entries
1772 at the beginning, and we don't want garbage. */
1773 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1774 if (s->contents == NULL && s->_raw_size != 0)
1775 return FALSE;
1776 }
1777
1778 if (elf_hash_table (info)->dynamic_sections_created)
1779 {
1780 /* Add some entries to the .dynamic section. We fill in the
1781 values later, in sparc64_elf_finish_dynamic_sections, but we
1782 must add the entries now so that we get the correct size for
1783 the .dynamic section. The DT_DEBUG entry is filled in by the
1784 dynamic linker and used by the debugger. */
1785 #define add_dynamic_entry(TAG, VAL) \
1786 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1787
1788 int reg;
1789 struct sparc64_elf_app_reg * app_regs;
1790 struct elf_strtab_hash *dynstr;
1791 struct elf_link_hash_table *eht = elf_hash_table (info);
1792
1793 if (!info->shared)
1794 {
1795 if (!add_dynamic_entry (DT_DEBUG, 0))
1796 return FALSE;
1797 }
1798
1799 if (relplt)
1800 {
1801 if (!add_dynamic_entry (DT_PLTGOT, 0)
1802 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1803 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1804 || !add_dynamic_entry (DT_JMPREL, 0))
1805 return FALSE;
1806 }
1807
1808 if (!add_dynamic_entry (DT_RELA, 0)
1809 || !add_dynamic_entry (DT_RELASZ, 0)
1810 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
1811 return FALSE;
1812
1813 if (info->flags & DF_TEXTREL)
1814 {
1815 if (!add_dynamic_entry (DT_TEXTREL, 0))
1816 return FALSE;
1817 }
1818
1819 /* Add dynamic STT_REGISTER symbols and corresponding DT_SPARC_REGISTER
1820 entries if needed. */
1821 app_regs = sparc64_elf_hash_table (info)->app_regs;
1822 dynstr = eht->dynstr;
1823
1824 for (reg = 0; reg < 4; reg++)
1825 if (app_regs [reg].name != NULL)
1826 {
1827 struct elf_link_local_dynamic_entry *entry, *e;
1828
1829 if (!add_dynamic_entry (DT_SPARC_REGISTER, 0))
1830 return FALSE;
1831
1832 entry = (struct elf_link_local_dynamic_entry *)
1833 bfd_hash_allocate (&info->hash->table, sizeof (*entry));
1834 if (entry == NULL)
1835 return FALSE;
1836
1837 /* We cheat here a little bit: the symbol will not be local, so we
1838 put it at the end of the dynlocal linked list. We will fix it
1839 later on, as we have to fix other fields anyway. */
1840 entry->isym.st_value = reg < 2 ? reg + 2 : reg + 4;
1841 entry->isym.st_size = 0;
1842 if (*app_regs [reg].name != '\0')
1843 entry->isym.st_name
1844 = _bfd_elf_strtab_add (dynstr, app_regs[reg].name, FALSE);
1845 else
1846 entry->isym.st_name = 0;
1847 entry->isym.st_other = 0;
1848 entry->isym.st_info = ELF_ST_INFO (app_regs [reg].bind,
1849 STT_REGISTER);
1850 entry->isym.st_shndx = app_regs [reg].shndx;
1851 entry->next = NULL;
1852 entry->input_bfd = output_bfd;
1853 entry->input_indx = -1;
1854
1855 if (eht->dynlocal == NULL)
1856 eht->dynlocal = entry;
1857 else
1858 {
1859 for (e = eht->dynlocal; e->next; e = e->next)
1860 ;
1861 e->next = entry;
1862 }
1863 eht->dynsymcount++;
1864 }
1865 }
1866 #undef add_dynamic_entry
1867
1868 return TRUE;
1869 }
1870 \f
1871 #define SET_SEC_DO_RELAX(section) do { elf_section_data(section)->tdata = (void *)1; } while (0)
1872 #define SEC_DO_RELAX(section) (elf_section_data(section)->tdata == (void *)1)
1873
1874 static bfd_boolean
1875 sparc64_elf_relax_section (abfd, section, link_info, again)
1876 bfd *abfd ATTRIBUTE_UNUSED;
1877 asection *section ATTRIBUTE_UNUSED;
1878 struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
1879 bfd_boolean *again;
1880 {
1881 *again = FALSE;
1882 SET_SEC_DO_RELAX (section);
1883 return TRUE;
1884 }
1885 \f
1886 /* This is the condition under which finish_dynamic_symbol will be called
1887 from elflink.h. If elflink.h doesn't call our finish_dynamic_symbol
1888 routine, we'll need to do something about initializing any .plt and
1889 .got entries in relocate_section. */
1890 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1891 ((DYN) \
1892 && ((INFO)->shared \
1893 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1894 && ((H)->dynindx != -1 \
1895 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1896
1897 /* Relocate a SPARC64 ELF section. */
1898
1899 static bfd_boolean
1900 sparc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1901 contents, relocs, local_syms, local_sections)
1902 bfd *output_bfd;
1903 struct bfd_link_info *info;
1904 bfd *input_bfd;
1905 asection *input_section;
1906 bfd_byte *contents;
1907 Elf_Internal_Rela *relocs;
1908 Elf_Internal_Sym *local_syms;
1909 asection **local_sections;
1910 {
1911 bfd *dynobj;
1912 Elf_Internal_Shdr *symtab_hdr;
1913 struct elf_link_hash_entry **sym_hashes;
1914 bfd_vma *local_got_offsets;
1915 bfd_vma got_base;
1916 asection *sgot;
1917 asection *splt;
1918 asection *sreloc;
1919 Elf_Internal_Rela *rel;
1920 Elf_Internal_Rela *relend;
1921
1922 if (info->relocateable)
1923 return TRUE;
1924
1925 dynobj = elf_hash_table (info)->dynobj;
1926 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1927 sym_hashes = elf_sym_hashes (input_bfd);
1928 local_got_offsets = elf_local_got_offsets (input_bfd);
1929
1930 if (elf_hash_table(info)->hgot == NULL)
1931 got_base = 0;
1932 else
1933 got_base = elf_hash_table (info)->hgot->root.u.def.value;
1934
1935 sgot = splt = sreloc = NULL;
1936
1937 rel = relocs;
1938 relend = relocs + NUM_SHDR_ENTRIES (& elf_section_data (input_section)->rel_hdr);
1939 for (; rel < relend; rel++)
1940 {
1941 int r_type;
1942 reloc_howto_type *howto;
1943 unsigned long r_symndx;
1944 struct elf_link_hash_entry *h;
1945 Elf_Internal_Sym *sym;
1946 asection *sec;
1947 bfd_vma relocation, off;
1948 bfd_reloc_status_type r;
1949 bfd_boolean is_plt = FALSE;
1950 bfd_boolean unresolved_reloc;
1951
1952 r_type = ELF64_R_TYPE_ID (rel->r_info);
1953 if (r_type < 0 || r_type >= (int) R_SPARC_max_std)
1954 {
1955 bfd_set_error (bfd_error_bad_value);
1956 return FALSE;
1957 }
1958 howto = sparc64_elf_howto_table + r_type;
1959
1960 /* This is a final link. */
1961 r_symndx = ELF64_R_SYM (rel->r_info);
1962 h = NULL;
1963 sym = NULL;
1964 sec = NULL;
1965 unresolved_reloc = FALSE;
1966 if (r_symndx < symtab_hdr->sh_info)
1967 {
1968 sym = local_syms + r_symndx;
1969 sec = local_sections[r_symndx];
1970 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1971 }
1972 else
1973 {
1974 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1975 while (h->root.type == bfd_link_hash_indirect
1976 || h->root.type == bfd_link_hash_warning)
1977 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1978
1979 relocation = 0;
1980 if (h->root.type == bfd_link_hash_defined
1981 || h->root.type == bfd_link_hash_defweak)
1982 {
1983 sec = h->root.u.def.section;
1984 if (sec->output_section == NULL)
1985 /* Set a flag that will be cleared later if we find a
1986 relocation value for this symbol. output_section
1987 is typically NULL for symbols satisfied by a shared
1988 library. */
1989 unresolved_reloc = TRUE;
1990 else
1991 relocation = (h->root.u.def.value
1992 + sec->output_section->vma
1993 + sec->output_offset);
1994 }
1995 else if (h->root.type == bfd_link_hash_undefweak)
1996 ;
1997 else if (info->shared
1998 && (!info->symbolic || info->allow_shlib_undefined)
1999 && !info->no_undefined
2000 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2001 ;
2002 else
2003 {
2004 if (! ((*info->callbacks->undefined_symbol)
2005 (info, h->root.root.string, input_bfd,
2006 input_section, rel->r_offset,
2007 (!info->shared || info->no_undefined
2008 || ELF_ST_VISIBILITY (h->other)))))
2009 return FALSE;
2010
2011 /* To avoid generating warning messages about truncated
2012 relocations, set the relocation's address to be the same as
2013 the start of this section. */
2014
2015 if (input_section->output_section != NULL)
2016 relocation = input_section->output_section->vma;
2017 else
2018 relocation = 0;
2019 }
2020 }
2021
2022 do_dynreloc:
2023 /* When generating a shared object, these relocations are copied
2024 into the output file to be resolved at run time. */
2025 if (info->shared && r_symndx != 0 && (input_section->flags & SEC_ALLOC))
2026 {
2027 switch (r_type)
2028 {
2029 case R_SPARC_PC10:
2030 case R_SPARC_PC22:
2031 case R_SPARC_PC_HH22:
2032 case R_SPARC_PC_HM10:
2033 case R_SPARC_PC_LM22:
2034 if (h != NULL
2035 && !strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_"))
2036 break;
2037 /* Fall through. */
2038 case R_SPARC_DISP8:
2039 case R_SPARC_DISP16:
2040 case R_SPARC_DISP32:
2041 case R_SPARC_DISP64:
2042 case R_SPARC_WDISP30:
2043 case R_SPARC_WDISP22:
2044 case R_SPARC_WDISP19:
2045 case R_SPARC_WDISP16:
2046 if (h == NULL)
2047 break;
2048 /* Fall through. */
2049 case R_SPARC_8:
2050 case R_SPARC_16:
2051 case R_SPARC_32:
2052 case R_SPARC_HI22:
2053 case R_SPARC_22:
2054 case R_SPARC_13:
2055 case R_SPARC_LO10:
2056 case R_SPARC_UA32:
2057 case R_SPARC_10:
2058 case R_SPARC_11:
2059 case R_SPARC_64:
2060 case R_SPARC_OLO10:
2061 case R_SPARC_HH22:
2062 case R_SPARC_HM10:
2063 case R_SPARC_LM22:
2064 case R_SPARC_7:
2065 case R_SPARC_5:
2066 case R_SPARC_6:
2067 case R_SPARC_HIX22:
2068 case R_SPARC_LOX10:
2069 case R_SPARC_H44:
2070 case R_SPARC_M44:
2071 case R_SPARC_L44:
2072 case R_SPARC_UA64:
2073 case R_SPARC_UA16:
2074 {
2075 Elf_Internal_Rela outrel;
2076 bfd_byte *loc;
2077 bfd_boolean skip, relocate;
2078
2079 if (sreloc == NULL)
2080 {
2081 const char *name =
2082 (bfd_elf_string_from_elf_section
2083 (input_bfd,
2084 elf_elfheader (input_bfd)->e_shstrndx,
2085 elf_section_data (input_section)->rel_hdr.sh_name));
2086
2087 if (name == NULL)
2088 return FALSE;
2089
2090 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2091 && strcmp (bfd_get_section_name(input_bfd,
2092 input_section),
2093 name + 5) == 0);
2094
2095 sreloc = bfd_get_section_by_name (dynobj, name);
2096 BFD_ASSERT (sreloc != NULL);
2097 }
2098
2099 skip = FALSE;
2100 relocate = FALSE;
2101
2102 outrel.r_offset =
2103 _bfd_elf_section_offset (output_bfd, info, input_section,
2104 rel->r_offset);
2105 if (outrel.r_offset == (bfd_vma) -1)
2106 skip = TRUE;
2107 else if (outrel.r_offset == (bfd_vma) -2)
2108 skip = TRUE, relocate = TRUE;
2109
2110 outrel.r_offset += (input_section->output_section->vma
2111 + input_section->output_offset);
2112
2113 /* Optimize unaligned reloc usage now that we know where
2114 it finally resides. */
2115 switch (r_type)
2116 {
2117 case R_SPARC_16:
2118 if (outrel.r_offset & 1) r_type = R_SPARC_UA16;
2119 break;
2120 case R_SPARC_UA16:
2121 if (!(outrel.r_offset & 1)) r_type = R_SPARC_16;
2122 break;
2123 case R_SPARC_32:
2124 if (outrel.r_offset & 3) r_type = R_SPARC_UA32;
2125 break;
2126 case R_SPARC_UA32:
2127 if (!(outrel.r_offset & 3)) r_type = R_SPARC_32;
2128 break;
2129 case R_SPARC_64:
2130 if (outrel.r_offset & 7) r_type = R_SPARC_UA64;
2131 break;
2132 case R_SPARC_UA64:
2133 if (!(outrel.r_offset & 7)) r_type = R_SPARC_64;
2134 break;
2135 case R_SPARC_DISP8:
2136 case R_SPARC_DISP16:
2137 case R_SPARC_DISP32:
2138 case R_SPARC_DISP64:
2139 /* If the symbol is not dynamic, we should not keep
2140 a dynamic relocation. But an .rela.* slot has been
2141 allocated for it, output R_SPARC_NONE.
2142 FIXME: Add code tracking needed dynamic relocs as
2143 e.g. i386 has. */
2144 if (h->dynindx == -1)
2145 skip = TRUE, relocate = TRUE;
2146 break;
2147 }
2148
2149 if (skip)
2150 memset (&outrel, 0, sizeof outrel);
2151 /* h->dynindx may be -1 if the symbol was marked to
2152 become local. */
2153 else if (h != NULL && ! is_plt
2154 && ((! info->symbolic && h->dynindx != -1)
2155 || (h->elf_link_hash_flags
2156 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2157 {
2158 BFD_ASSERT (h->dynindx != -1);
2159 outrel.r_info
2160 = ELF64_R_INFO (h->dynindx,
2161 ELF64_R_TYPE_INFO (
2162 ELF64_R_TYPE_DATA (rel->r_info),
2163 r_type));
2164 outrel.r_addend = rel->r_addend;
2165 }
2166 else
2167 {
2168 outrel.r_addend = relocation + rel->r_addend;
2169 if (r_type == R_SPARC_64)
2170 outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE);
2171 else
2172 {
2173 long indx;
2174
2175 if (is_plt)
2176 sec = splt;
2177 else if (h == NULL)
2178 sec = local_sections[r_symndx];
2179 else
2180 {
2181 BFD_ASSERT (h->root.type == bfd_link_hash_defined
2182 || (h->root.type
2183 == bfd_link_hash_defweak));
2184 sec = h->root.u.def.section;
2185 }
2186 if (sec != NULL && bfd_is_abs_section (sec))
2187 indx = 0;
2188 else if (sec == NULL || sec->owner == NULL)
2189 {
2190 bfd_set_error (bfd_error_bad_value);
2191 return FALSE;
2192 }
2193 else
2194 {
2195 asection *osec;
2196
2197 osec = sec->output_section;
2198 indx = elf_section_data (osec)->dynindx;
2199
2200 /* We are turning this relocation into one
2201 against a section symbol, so subtract out
2202 the output section's address but not the
2203 offset of the input section in the output
2204 section. */
2205 outrel.r_addend -= osec->vma;
2206
2207 /* FIXME: we really should be able to link non-pic
2208 shared libraries. */
2209 if (indx == 0)
2210 {
2211 BFD_FAIL ();
2212 (*_bfd_error_handler)
2213 (_("%s: probably compiled without -fPIC?"),
2214 bfd_archive_filename (input_bfd));
2215 bfd_set_error (bfd_error_bad_value);
2216 return FALSE;
2217 }
2218 }
2219
2220 outrel.r_info
2221 = ELF64_R_INFO (indx,
2222 ELF64_R_TYPE_INFO (
2223 ELF64_R_TYPE_DATA (rel->r_info),
2224 r_type));
2225 }
2226 }
2227
2228 loc = sreloc->contents;
2229 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2230 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2231
2232 /* This reloc will be computed at runtime, so there's no
2233 need to do anything now. */
2234 if (! relocate)
2235 continue;
2236 }
2237 break;
2238 }
2239 }
2240
2241 switch (r_type)
2242 {
2243 case R_SPARC_GOT10:
2244 case R_SPARC_GOT13:
2245 case R_SPARC_GOT22:
2246 /* Relocation is to the entry for this symbol in the global
2247 offset table. */
2248 if (sgot == NULL)
2249 {
2250 sgot = bfd_get_section_by_name (dynobj, ".got");
2251 BFD_ASSERT (sgot != NULL);
2252 }
2253
2254 if (h != NULL)
2255 {
2256 bfd_boolean dyn;
2257
2258 off = h->got.offset;
2259 BFD_ASSERT (off != (bfd_vma) -1);
2260 dyn = elf_hash_table (info)->dynamic_sections_created;
2261
2262 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
2263 || (info->shared
2264 && (info->symbolic
2265 || h->dynindx == -1
2266 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2267 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2268 {
2269 /* This is actually a static link, or it is a -Bsymbolic
2270 link and the symbol is defined locally, or the symbol
2271 was forced to be local because of a version file. We
2272 must initialize this entry in the global offset table.
2273 Since the offset must always be a multiple of 8, we
2274 use the least significant bit to record whether we
2275 have initialized it already.
2276
2277 When doing a dynamic link, we create a .rela.got
2278 relocation entry to initialize the value. This is
2279 done in the finish_dynamic_symbol routine. */
2280
2281 if ((off & 1) != 0)
2282 off &= ~1;
2283 else
2284 {
2285 bfd_put_64 (output_bfd, relocation,
2286 sgot->contents + off);
2287 h->got.offset |= 1;
2288 }
2289 }
2290 else
2291 unresolved_reloc = FALSE;
2292 }
2293 else
2294 {
2295 BFD_ASSERT (local_got_offsets != NULL);
2296 off = local_got_offsets[r_symndx];
2297 BFD_ASSERT (off != (bfd_vma) -1);
2298
2299 /* The offset must always be a multiple of 8. We use
2300 the least significant bit to record whether we have
2301 already processed this entry. */
2302 if ((off & 1) != 0)
2303 off &= ~1;
2304 else
2305 {
2306 local_got_offsets[r_symndx] |= 1;
2307
2308 if (info->shared)
2309 {
2310 asection *s;
2311 Elf_Internal_Rela outrel;
2312 bfd_byte *loc;
2313
2314 /* The Solaris 2.7 64-bit linker adds the contents
2315 of the location to the value of the reloc.
2316 Note this is different behaviour to the
2317 32-bit linker, which both adds the contents
2318 and ignores the addend. So clear the location. */
2319 bfd_put_64 (output_bfd, (bfd_vma) 0,
2320 sgot->contents + off);
2321
2322 /* We need to generate a R_SPARC_RELATIVE reloc
2323 for the dynamic linker. */
2324 s = bfd_get_section_by_name(dynobj, ".rela.got");
2325 BFD_ASSERT (s != NULL);
2326
2327 outrel.r_offset = (sgot->output_section->vma
2328 + sgot->output_offset
2329 + off);
2330 outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE);
2331 outrel.r_addend = relocation;
2332 loc = s->contents;
2333 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2334 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2335 }
2336 else
2337 bfd_put_64 (output_bfd, relocation, sgot->contents + off);
2338 }
2339 }
2340 relocation = sgot->output_offset + off - got_base;
2341 goto do_default;
2342
2343 case R_SPARC_WPLT30:
2344 case R_SPARC_PLT32:
2345 case R_SPARC_HIPLT22:
2346 case R_SPARC_LOPLT10:
2347 case R_SPARC_PCPLT32:
2348 case R_SPARC_PCPLT22:
2349 case R_SPARC_PCPLT10:
2350 case R_SPARC_PLT64:
2351 /* Relocation is to the entry for this symbol in the
2352 procedure linkage table. */
2353 BFD_ASSERT (h != NULL);
2354
2355 if (h->plt.offset == (bfd_vma) -1)
2356 {
2357 /* We didn't make a PLT entry for this symbol. This
2358 happens when statically linking PIC code, or when
2359 using -Bsymbolic. */
2360 goto do_default;
2361 }
2362
2363 if (splt == NULL)
2364 {
2365 splt = bfd_get_section_by_name (dynobj, ".plt");
2366 BFD_ASSERT (splt != NULL);
2367 }
2368
2369 relocation = (splt->output_section->vma
2370 + splt->output_offset
2371 + sparc64_elf_plt_entry_offset (h->plt.offset));
2372 unresolved_reloc = FALSE;
2373 if (r_type == R_SPARC_WPLT30)
2374 goto do_wplt30;
2375 if (r_type == R_SPARC_PLT32 || r_type == R_SPARC_PLT64)
2376 {
2377 r_type = r_type == R_SPARC_PLT32 ? R_SPARC_32 : R_SPARC_64;
2378 is_plt = TRUE;
2379 goto do_dynreloc;
2380 }
2381 goto do_default;
2382
2383 case R_SPARC_OLO10:
2384 {
2385 bfd_vma x;
2386
2387 relocation += rel->r_addend;
2388 relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info);
2389
2390 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2391 x = (x & ~(bfd_vma) 0x1fff) | (relocation & 0x1fff);
2392 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2393
2394 r = bfd_check_overflow (howto->complain_on_overflow,
2395 howto->bitsize, howto->rightshift,
2396 bfd_arch_bits_per_address (input_bfd),
2397 relocation);
2398 }
2399 break;
2400
2401 case R_SPARC_WDISP16:
2402 {
2403 bfd_vma x;
2404
2405 relocation += rel->r_addend;
2406 /* Adjust for pc-relative-ness. */
2407 relocation -= (input_section->output_section->vma
2408 + input_section->output_offset);
2409 relocation -= rel->r_offset;
2410
2411 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2412 x &= ~(bfd_vma) 0x303fff;
2413 x |= ((((relocation >> 2) & 0xc000) << 6)
2414 | ((relocation >> 2) & 0x3fff));
2415 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2416
2417 r = bfd_check_overflow (howto->complain_on_overflow,
2418 howto->bitsize, howto->rightshift,
2419 bfd_arch_bits_per_address (input_bfd),
2420 relocation);
2421 }
2422 break;
2423
2424 case R_SPARC_HIX22:
2425 {
2426 bfd_vma x;
2427
2428 relocation += rel->r_addend;
2429 relocation = relocation ^ MINUS_ONE;
2430
2431 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2432 x = (x & ~(bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff);
2433 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2434
2435 r = bfd_check_overflow (howto->complain_on_overflow,
2436 howto->bitsize, howto->rightshift,
2437 bfd_arch_bits_per_address (input_bfd),
2438 relocation);
2439 }
2440 break;
2441
2442 case R_SPARC_LOX10:
2443 {
2444 bfd_vma x;
2445
2446 relocation += rel->r_addend;
2447 relocation = (relocation & 0x3ff) | 0x1c00;
2448
2449 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2450 x = (x & ~(bfd_vma) 0x1fff) | relocation;
2451 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2452
2453 r = bfd_reloc_ok;
2454 }
2455 break;
2456
2457 case R_SPARC_WDISP30:
2458 do_wplt30:
2459 if (SEC_DO_RELAX (input_section)
2460 && rel->r_offset + 4 < input_section->_raw_size)
2461 {
2462 #define G0 0
2463 #define O7 15
2464 #define XCC (2 << 20)
2465 #define COND(x) (((x)&0xf)<<25)
2466 #define CONDA COND(0x8)
2467 #define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC)
2468 #define INSN_BA (F2(0,2) | CONDA)
2469 #define INSN_OR F3(2, 0x2, 0)
2470 #define INSN_NOP F2(0,4)
2471
2472 bfd_vma x, y;
2473
2474 /* If the instruction is a call with either:
2475 restore
2476 arithmetic instruction with rd == %o7
2477 where rs1 != %o7 and rs2 if it is register != %o7
2478 then we can optimize if the call destination is near
2479 by changing the call into a branch always. */
2480 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2481 y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
2482 if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2))
2483 {
2484 if (((y & OP3(~0)) == OP3(0x3d) /* restore */
2485 || ((y & OP3(0x28)) == 0 /* arithmetic */
2486 && (y & RD(~0)) == RD(O7)))
2487 && (y & RS1(~0)) != RS1(O7)
2488 && ((y & F3I(~0))
2489 || (y & RS2(~0)) != RS2(O7)))
2490 {
2491 bfd_vma reloc;
2492
2493 reloc = relocation + rel->r_addend - rel->r_offset;
2494 reloc -= (input_section->output_section->vma
2495 + input_section->output_offset);
2496 if (reloc & 3)
2497 goto do_default;
2498
2499 /* Ensure the branch fits into simm22. */
2500 if ((reloc & ~(bfd_vma)0x7fffff)
2501 && ((reloc | 0x7fffff) != MINUS_ONE))
2502 goto do_default;
2503 reloc >>= 2;
2504
2505 /* Check whether it fits into simm19. */
2506 if ((reloc & 0x3c0000) == 0
2507 || (reloc & 0x3c0000) == 0x3c0000)
2508 x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */
2509 else
2510 x = INSN_BA | (reloc & 0x3fffff); /* ba */
2511 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2512 r = bfd_reloc_ok;
2513 if (rel->r_offset >= 4
2514 && (y & (0xffffffff ^ RS1(~0)))
2515 == (INSN_OR | RD(O7) | RS2(G0)))
2516 {
2517 bfd_vma z;
2518 unsigned int reg;
2519
2520 z = bfd_get_32 (input_bfd,
2521 contents + rel->r_offset - 4);
2522 if ((z & (0xffffffff ^ RD(~0)))
2523 != (INSN_OR | RS1(O7) | RS2(G0)))
2524 break;
2525
2526 /* The sequence was
2527 or %o7, %g0, %rN
2528 call foo
2529 or %rN, %g0, %o7
2530
2531 If call foo was replaced with ba, replace
2532 or %rN, %g0, %o7 with nop. */
2533
2534 reg = (y & RS1(~0)) >> 14;
2535 if (reg != ((z & RD(~0)) >> 25)
2536 || reg == G0 || reg == O7)
2537 break;
2538
2539 bfd_put_32 (input_bfd, (bfd_vma) INSN_NOP,
2540 contents + rel->r_offset + 4);
2541 }
2542 break;
2543 }
2544 }
2545 }
2546 /* FALLTHROUGH */
2547
2548 default:
2549 do_default:
2550 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2551 contents, rel->r_offset,
2552 relocation, rel->r_addend);
2553 break;
2554 }
2555
2556 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2557 because such sections are not SEC_ALLOC and thus ld.so will
2558 not process them. */
2559 if (unresolved_reloc
2560 && !((input_section->flags & SEC_DEBUGGING) != 0
2561 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2562 (*_bfd_error_handler)
2563 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2564 bfd_archive_filename (input_bfd),
2565 bfd_get_section_name (input_bfd, input_section),
2566 (long) rel->r_offset,
2567 h->root.root.string);
2568
2569 switch (r)
2570 {
2571 case bfd_reloc_ok:
2572 break;
2573
2574 default:
2575 case bfd_reloc_outofrange:
2576 abort ();
2577
2578 case bfd_reloc_overflow:
2579 {
2580 const char *name;
2581
2582 /* The Solaris native linker silently disregards
2583 overflows. We don't, but this breaks stabs debugging
2584 info, whose relocations are only 32-bits wide. Ignore
2585 overflows for discarded entries. */
2586 if (r_type == R_SPARC_32
2587 && _bfd_elf_section_offset (output_bfd, info, input_section,
2588 rel->r_offset) == (bfd_vma) -1)
2589 break;
2590
2591 if (h != NULL)
2592 {
2593 if (h->root.type == bfd_link_hash_undefweak
2594 && howto->pc_relative)
2595 {
2596 /* Assume this is a call protected by other code that
2597 detect the symbol is undefined. If this is the case,
2598 we can safely ignore the overflow. If not, the
2599 program is hosed anyway, and a little warning isn't
2600 going to help. */
2601 break;
2602 }
2603
2604 name = h->root.root.string;
2605 }
2606 else
2607 {
2608 name = (bfd_elf_string_from_elf_section
2609 (input_bfd,
2610 symtab_hdr->sh_link,
2611 sym->st_name));
2612 if (name == NULL)
2613 return FALSE;
2614 if (*name == '\0')
2615 name = bfd_section_name (input_bfd, sec);
2616 }
2617 if (! ((*info->callbacks->reloc_overflow)
2618 (info, name, howto->name, (bfd_vma) 0,
2619 input_bfd, input_section, rel->r_offset)))
2620 return FALSE;
2621 }
2622 break;
2623 }
2624 }
2625
2626 return TRUE;
2627 }
2628
2629 /* Finish up dynamic symbol handling. We set the contents of various
2630 dynamic sections here. */
2631
2632 static bfd_boolean
2633 sparc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
2634 bfd *output_bfd;
2635 struct bfd_link_info *info;
2636 struct elf_link_hash_entry *h;
2637 Elf_Internal_Sym *sym;
2638 {
2639 bfd *dynobj;
2640
2641 dynobj = elf_hash_table (info)->dynobj;
2642
2643 if (h->plt.offset != (bfd_vma) -1)
2644 {
2645 asection *splt;
2646 asection *srela;
2647 Elf_Internal_Rela rela;
2648 bfd_byte *loc;
2649
2650 /* This symbol has an entry in the PLT. Set it up. */
2651
2652 BFD_ASSERT (h->dynindx != -1);
2653
2654 splt = bfd_get_section_by_name (dynobj, ".plt");
2655 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2656 BFD_ASSERT (splt != NULL && srela != NULL);
2657
2658 /* Fill in the entry in the .rela.plt section. */
2659
2660 if (h->plt.offset < LARGE_PLT_THRESHOLD)
2661 {
2662 rela.r_offset = sparc64_elf_plt_entry_offset (h->plt.offset);
2663 rela.r_addend = 0;
2664 }
2665 else
2666 {
2667 bfd_vma max = splt->_raw_size / PLT_ENTRY_SIZE;
2668 rela.r_offset = sparc64_elf_plt_ptr_offset (h->plt.offset, max);
2669 rela.r_addend = -(sparc64_elf_plt_entry_offset (h->plt.offset) + 4)
2670 -(splt->output_section->vma + splt->output_offset);
2671 }
2672 rela.r_offset += (splt->output_section->vma + splt->output_offset);
2673 rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_JMP_SLOT);
2674
2675 /* Adjust for the first 4 reserved elements in the .plt section
2676 when setting the offset in the .rela.plt section.
2677 Sun forgot to read their own ABI and copied elf32-sparc behaviour,
2678 thus .plt[4] has corresponding .rela.plt[0] and so on. */
2679
2680 loc = srela->contents;
2681 loc += (h->plt.offset - 4) * sizeof (Elf64_External_Rela);
2682 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
2683
2684 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2685 {
2686 /* Mark the symbol as undefined, rather than as defined in
2687 the .plt section. Leave the value alone. */
2688 sym->st_shndx = SHN_UNDEF;
2689 /* If the symbol is weak, we do need to clear the value.
2690 Otherwise, the PLT entry would provide a definition for
2691 the symbol even if the symbol wasn't defined anywhere,
2692 and so the symbol would never be NULL. */
2693 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
2694 == 0)
2695 sym->st_value = 0;
2696 }
2697 }
2698
2699 if (h->got.offset != (bfd_vma) -1)
2700 {
2701 asection *sgot;
2702 asection *srela;
2703 Elf_Internal_Rela rela;
2704 bfd_byte *loc;
2705
2706 /* This symbol has an entry in the GOT. Set it up. */
2707
2708 sgot = bfd_get_section_by_name (dynobj, ".got");
2709 srela = bfd_get_section_by_name (dynobj, ".rela.got");
2710 BFD_ASSERT (sgot != NULL && srela != NULL);
2711
2712 rela.r_offset = (sgot->output_section->vma
2713 + sgot->output_offset
2714 + (h->got.offset &~ (bfd_vma) 1));
2715
2716 /* If this is a -Bsymbolic link, and the symbol is defined
2717 locally, we just want to emit a RELATIVE reloc. Likewise if
2718 the symbol was forced to be local because of a version file.
2719 The entry in the global offset table will already have been
2720 initialized in the relocate_section function. */
2721 if (info->shared
2722 && (info->symbolic || h->dynindx == -1)
2723 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2724 {
2725 asection *sec = h->root.u.def.section;
2726 rela.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE);
2727 rela.r_addend = (h->root.u.def.value
2728 + sec->output_section->vma
2729 + sec->output_offset);
2730 }
2731 else
2732 {
2733 rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_GLOB_DAT);
2734 rela.r_addend = 0;
2735 }
2736
2737 bfd_put_64 (output_bfd, (bfd_vma) 0,
2738 sgot->contents + (h->got.offset &~ (bfd_vma) 1));
2739 loc = srela->contents;
2740 loc += srela->reloc_count++ * sizeof (Elf64_External_Rela);
2741 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
2742 }
2743
2744 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2745 {
2746 asection *s;
2747 Elf_Internal_Rela rela;
2748 bfd_byte *loc;
2749
2750 /* This symbols needs a copy reloc. Set it up. */
2751
2752 BFD_ASSERT (h->dynindx != -1);
2753
2754 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2755 ".rela.bss");
2756 BFD_ASSERT (s != NULL);
2757
2758 rela.r_offset = (h->root.u.def.value
2759 + h->root.u.def.section->output_section->vma
2760 + h->root.u.def.section->output_offset);
2761 rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_COPY);
2762 rela.r_addend = 0;
2763 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
2764 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
2765 }
2766
2767 /* Mark some specially defined symbols as absolute. */
2768 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2769 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2770 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2771 sym->st_shndx = SHN_ABS;
2772
2773 return TRUE;
2774 }
2775
2776 /* Finish up the dynamic sections. */
2777
2778 static bfd_boolean
2779 sparc64_elf_finish_dynamic_sections (output_bfd, info)
2780 bfd *output_bfd;
2781 struct bfd_link_info *info;
2782 {
2783 bfd *dynobj;
2784 int stt_regidx = -1;
2785 asection *sdyn;
2786 asection *sgot;
2787
2788 dynobj = elf_hash_table (info)->dynobj;
2789
2790 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2791
2792 if (elf_hash_table (info)->dynamic_sections_created)
2793 {
2794 asection *splt;
2795 Elf64_External_Dyn *dyncon, *dynconend;
2796
2797 splt = bfd_get_section_by_name (dynobj, ".plt");
2798 BFD_ASSERT (splt != NULL && sdyn != NULL);
2799
2800 dyncon = (Elf64_External_Dyn *) sdyn->contents;
2801 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2802 for (; dyncon < dynconend; dyncon++)
2803 {
2804 Elf_Internal_Dyn dyn;
2805 const char *name;
2806 bfd_boolean size;
2807
2808 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
2809
2810 switch (dyn.d_tag)
2811 {
2812 case DT_PLTGOT: name = ".plt"; size = FALSE; break;
2813 case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
2814 case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
2815 case DT_SPARC_REGISTER:
2816 if (stt_regidx == -1)
2817 {
2818 stt_regidx =
2819 _bfd_elf_link_lookup_local_dynindx (info, output_bfd, -1);
2820 if (stt_regidx == -1)
2821 return FALSE;
2822 }
2823 dyn.d_un.d_val = stt_regidx++;
2824 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2825 /* fallthrough */
2826 default: name = NULL; size = FALSE; break;
2827 }
2828
2829 if (name != NULL)
2830 {
2831 asection *s;
2832
2833 s = bfd_get_section_by_name (output_bfd, name);
2834 if (s == NULL)
2835 dyn.d_un.d_val = 0;
2836 else
2837 {
2838 if (! size)
2839 dyn.d_un.d_ptr = s->vma;
2840 else
2841 {
2842 if (s->_cooked_size != 0)
2843 dyn.d_un.d_val = s->_cooked_size;
2844 else
2845 dyn.d_un.d_val = s->_raw_size;
2846 }
2847 }
2848 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2849 }
2850 }
2851
2852 /* Initialize the contents of the .plt section. */
2853 if (splt->_raw_size > 0)
2854 {
2855 sparc64_elf_build_plt (output_bfd, splt->contents,
2856 (int) (splt->_raw_size / PLT_ENTRY_SIZE));
2857 }
2858
2859 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
2860 PLT_ENTRY_SIZE;
2861 }
2862
2863 /* Set the first entry in the global offset table to the address of
2864 the dynamic section. */
2865 sgot = bfd_get_section_by_name (dynobj, ".got");
2866 BFD_ASSERT (sgot != NULL);
2867 if (sgot->_raw_size > 0)
2868 {
2869 if (sdyn == NULL)
2870 bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents);
2871 else
2872 bfd_put_64 (output_bfd,
2873 sdyn->output_section->vma + sdyn->output_offset,
2874 sgot->contents);
2875 }
2876
2877 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 8;
2878
2879 return TRUE;
2880 }
2881
2882 static enum elf_reloc_type_class
2883 sparc64_elf_reloc_type_class (rela)
2884 const Elf_Internal_Rela *rela;
2885 {
2886 switch ((int) ELF64_R_TYPE (rela->r_info))
2887 {
2888 case R_SPARC_RELATIVE:
2889 return reloc_class_relative;
2890 case R_SPARC_JMP_SLOT:
2891 return reloc_class_plt;
2892 case R_SPARC_COPY:
2893 return reloc_class_copy;
2894 default:
2895 return reloc_class_normal;
2896 }
2897 }
2898 \f
2899 /* Functions for dealing with the e_flags field. */
2900
2901 /* Merge backend specific data from an object file to the output
2902 object file when linking. */
2903
2904 static bfd_boolean
2905 sparc64_elf_merge_private_bfd_data (ibfd, obfd)
2906 bfd *ibfd;
2907 bfd *obfd;
2908 {
2909 bfd_boolean error;
2910 flagword new_flags, old_flags;
2911 int new_mm, old_mm;
2912
2913 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2914 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2915 return TRUE;
2916
2917 new_flags = elf_elfheader (ibfd)->e_flags;
2918 old_flags = elf_elfheader (obfd)->e_flags;
2919
2920 if (!elf_flags_init (obfd)) /* First call, no flags set */
2921 {
2922 elf_flags_init (obfd) = TRUE;
2923 elf_elfheader (obfd)->e_flags = new_flags;
2924 }
2925
2926 else if (new_flags == old_flags) /* Compatible flags are ok */
2927 ;
2928
2929 else /* Incompatible flags */
2930 {
2931 error = FALSE;
2932
2933 #define EF_SPARC_ISA_EXTENSIONS \
2934 (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1)
2935
2936 if ((ibfd->flags & DYNAMIC) != 0)
2937 {
2938 /* We don't want dynamic objects memory ordering and
2939 architecture to have any role. That's what dynamic linker
2940 should do. */
2941 new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS);
2942 new_flags |= (old_flags
2943 & (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS));
2944 }
2945 else
2946 {
2947 /* Choose the highest architecture requirements. */
2948 old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS);
2949 new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS);
2950 if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3))
2951 && (old_flags & EF_SPARC_HAL_R1))
2952 {
2953 error = TRUE;
2954 (*_bfd_error_handler)
2955 (_("%s: linking UltraSPARC specific with HAL specific code"),
2956 bfd_archive_filename (ibfd));
2957 }
2958 /* Choose the most restrictive memory ordering. */
2959 old_mm = (old_flags & EF_SPARCV9_MM);
2960 new_mm = (new_flags & EF_SPARCV9_MM);
2961 old_flags &= ~EF_SPARCV9_MM;
2962 new_flags &= ~EF_SPARCV9_MM;
2963 if (new_mm < old_mm)
2964 old_mm = new_mm;
2965 old_flags |= old_mm;
2966 new_flags |= old_mm;
2967 }
2968
2969 /* Warn about any other mismatches */
2970 if (new_flags != old_flags)
2971 {
2972 error = TRUE;
2973 (*_bfd_error_handler)
2974 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
2975 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
2976 }
2977
2978 elf_elfheader (obfd)->e_flags = old_flags;
2979
2980 if (error)
2981 {
2982 bfd_set_error (bfd_error_bad_value);
2983 return FALSE;
2984 }
2985 }
2986 return TRUE;
2987 }
2988
2989 /* MARCO: Set the correct entry size for the .stab section. */
2990
2991 static bfd_boolean
2992 sparc64_elf_fake_sections (abfd, hdr, sec)
2993 bfd *abfd ATTRIBUTE_UNUSED;
2994 Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED;
2995 asection *sec;
2996 {
2997 const char *name;
2998
2999 name = bfd_get_section_name (abfd, sec);
3000
3001 if (strcmp (name, ".stab") == 0)
3002 {
3003 /* Even in the 64bit case the stab entries are only 12 bytes long. */
3004 elf_section_data (sec)->this_hdr.sh_entsize = 12;
3005 }
3006
3007 return TRUE;
3008 }
3009 \f
3010 /* Print a STT_REGISTER symbol to file FILE. */
3011
3012 static const char *
3013 sparc64_elf_print_symbol_all (abfd, filep, symbol)
3014 bfd *abfd ATTRIBUTE_UNUSED;
3015 PTR filep;
3016 asymbol *symbol;
3017 {
3018 FILE *file = (FILE *) filep;
3019 int reg, type;
3020
3021 if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info)
3022 != STT_REGISTER)
3023 return NULL;
3024
3025 reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
3026 type = symbol->flags;
3027 fprintf (file, "REG_%c%c%11s%c%c R", "GOLI" [reg / 8], '0' + (reg & 7), "",
3028 ((type & BSF_LOCAL)
3029 ? (type & BSF_GLOBAL) ? '!' : 'l'
3030 : (type & BSF_GLOBAL) ? 'g' : ' '),
3031 (type & BSF_WEAK) ? 'w' : ' ');
3032 if (symbol->name == NULL || symbol->name [0] == '\0')
3033 return "#scratch";
3034 else
3035 return symbol->name;
3036 }
3037 \f
3038 /* Set the right machine number for a SPARC64 ELF file. */
3039
3040 static bfd_boolean
3041 sparc64_elf_object_p (abfd)
3042 bfd *abfd;
3043 {
3044 unsigned long mach = bfd_mach_sparc_v9;
3045
3046 if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3)
3047 mach = bfd_mach_sparc_v9b;
3048 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1)
3049 mach = bfd_mach_sparc_v9a;
3050 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach);
3051 }
3052
3053 /* Relocations in the 64 bit SPARC ELF ABI are more complex than in
3054 standard ELF, because R_SPARC_OLO10 has secondary addend in
3055 ELF64_R_TYPE_DATA field. This structure is used to redirect the
3056 relocation handling routines. */
3057
3058 const struct elf_size_info sparc64_elf_size_info =
3059 {
3060 sizeof (Elf64_External_Ehdr),
3061 sizeof (Elf64_External_Phdr),
3062 sizeof (Elf64_External_Shdr),
3063 sizeof (Elf64_External_Rel),
3064 sizeof (Elf64_External_Rela),
3065 sizeof (Elf64_External_Sym),
3066 sizeof (Elf64_External_Dyn),
3067 sizeof (Elf_External_Note),
3068 4, /* hash-table entry size */
3069 /* internal relocations per external relocations.
3070 For link purposes we use just 1 internal per
3071 1 external, for assembly and slurp symbol table
3072 we use 2. */
3073 1,
3074 64, /* arch_size */
3075 8, /* file_align */
3076 ELFCLASS64,
3077 EV_CURRENT,
3078 bfd_elf64_write_out_phdrs,
3079 bfd_elf64_write_shdrs_and_ehdr,
3080 sparc64_elf_write_relocs,
3081 bfd_elf64_swap_symbol_in,
3082 bfd_elf64_swap_symbol_out,
3083 sparc64_elf_slurp_reloc_table,
3084 bfd_elf64_slurp_symbol_table,
3085 bfd_elf64_swap_dyn_in,
3086 bfd_elf64_swap_dyn_out,
3087 bfd_elf64_swap_reloc_in,
3088 bfd_elf64_swap_reloc_out,
3089 bfd_elf64_swap_reloca_in,
3090 bfd_elf64_swap_reloca_out
3091 };
3092
3093 #define TARGET_BIG_SYM bfd_elf64_sparc_vec
3094 #define TARGET_BIG_NAME "elf64-sparc"
3095 #define ELF_ARCH bfd_arch_sparc
3096 #define ELF_MAXPAGESIZE 0x100000
3097
3098 /* This is the official ABI value. */
3099 #define ELF_MACHINE_CODE EM_SPARCV9
3100
3101 /* This is the value that we used before the ABI was released. */
3102 #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9
3103
3104 #define bfd_elf64_bfd_link_hash_table_create \
3105 sparc64_elf_bfd_link_hash_table_create
3106
3107 #define elf_info_to_howto \
3108 sparc64_elf_info_to_howto
3109 #define bfd_elf64_get_reloc_upper_bound \
3110 sparc64_elf_get_reloc_upper_bound
3111 #define bfd_elf64_get_dynamic_reloc_upper_bound \
3112 sparc64_elf_get_dynamic_reloc_upper_bound
3113 #define bfd_elf64_canonicalize_dynamic_reloc \
3114 sparc64_elf_canonicalize_dynamic_reloc
3115 #define bfd_elf64_bfd_reloc_type_lookup \
3116 sparc64_elf_reloc_type_lookup
3117 #define bfd_elf64_bfd_relax_section \
3118 sparc64_elf_relax_section
3119
3120 #define elf_backend_create_dynamic_sections \
3121 _bfd_elf_create_dynamic_sections
3122 #define elf_backend_add_symbol_hook \
3123 sparc64_elf_add_symbol_hook
3124 #define elf_backend_get_symbol_type \
3125 sparc64_elf_get_symbol_type
3126 #define elf_backend_symbol_processing \
3127 sparc64_elf_symbol_processing
3128 #define elf_backend_check_relocs \
3129 sparc64_elf_check_relocs
3130 #define elf_backend_adjust_dynamic_symbol \
3131 sparc64_elf_adjust_dynamic_symbol
3132 #define elf_backend_size_dynamic_sections \
3133 sparc64_elf_size_dynamic_sections
3134 #define elf_backend_relocate_section \
3135 sparc64_elf_relocate_section
3136 #define elf_backend_finish_dynamic_symbol \
3137 sparc64_elf_finish_dynamic_symbol
3138 #define elf_backend_finish_dynamic_sections \
3139 sparc64_elf_finish_dynamic_sections
3140 #define elf_backend_print_symbol_all \
3141 sparc64_elf_print_symbol_all
3142 #define elf_backend_output_arch_syms \
3143 sparc64_elf_output_arch_syms
3144 #define bfd_elf64_bfd_merge_private_bfd_data \
3145 sparc64_elf_merge_private_bfd_data
3146 #define elf_backend_fake_sections \
3147 sparc64_elf_fake_sections
3148
3149 #define elf_backend_size_info \
3150 sparc64_elf_size_info
3151 #define elf_backend_object_p \
3152 sparc64_elf_object_p
3153 #define elf_backend_reloc_type_class \
3154 sparc64_elf_reloc_type_class
3155
3156 #define elf_backend_want_got_plt 0
3157 #define elf_backend_plt_readonly 0
3158 #define elf_backend_want_plt_sym 1
3159 #define elf_backend_rela_normal 1
3160
3161 /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table. */
3162 #define elf_backend_plt_alignment 8
3163
3164 #define elf_backend_got_header_size 8
3165 #define elf_backend_plt_header_size PLT_HEADER_SIZE
3166
3167 #include "elf64-target.h"
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