1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
5 This file is part of BFD, the Binary File Descriptor library.
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 3 of the License, or
10 (at your option) any later version.
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.
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., 51 Franklin Street - Fifth Floor, Boston, MA
29 static bfd_reloc_status_type
30 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
31 asection *, bfd *, char **);
32 static bfd_reloc_status_type
33 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
34 asection *, bfd *, char **);
36 /* The relocation "howto" table. */
38 static reloc_howto_type elf_howto_table[] =
40 HOWTO (R_390_NONE, /* type */
42 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
44 FALSE, /* pc_relative */
46 complain_overflow_dont, /* complain_on_overflow */
47 bfd_elf_generic_reloc, /* special_function */
48 "R_390_NONE", /* name */
49 FALSE, /* partial_inplace */
52 FALSE), /* pcrel_offset */
54 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
55 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
56 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
57 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
58 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
60 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
62 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
64 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
66 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
68 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
70 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
72 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
74 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
76 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
78 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
80 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
82 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
84 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
86 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
88 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
90 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
92 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
94 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
96 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
97 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
98 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
99 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
100 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
102 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
104 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
105 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
106 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
107 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
109 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
111 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
112 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
114 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
116 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
118 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
119 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
120 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
121 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
122 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
123 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
124 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
125 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
127 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
128 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
129 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
130 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
132 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
133 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
135 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
136 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
138 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
139 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
141 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
143 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
144 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
146 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
147 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
149 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
151 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
153 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
154 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
155 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
156 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
157 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
158 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
159 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
160 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
161 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
163 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
165 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
167 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
169 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
173 /* GNU extension to record C++ vtable hierarchy. */
174 static reloc_howto_type elf32_s390_vtinherit_howto =
175 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
176 static reloc_howto_type elf32_s390_vtentry_howto =
177 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
179 static reloc_howto_type *
180 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
181 bfd_reloc_code_real_type code)
186 return &elf_howto_table[(int) R_390_NONE];
188 return &elf_howto_table[(int) R_390_8];
189 case BFD_RELOC_390_12:
190 return &elf_howto_table[(int) R_390_12];
192 return &elf_howto_table[(int) R_390_16];
194 return &elf_howto_table[(int) R_390_32];
196 return &elf_howto_table[(int) R_390_32];
197 case BFD_RELOC_32_PCREL:
198 return &elf_howto_table[(int) R_390_PC32];
199 case BFD_RELOC_390_GOT12:
200 return &elf_howto_table[(int) R_390_GOT12];
201 case BFD_RELOC_32_GOT_PCREL:
202 return &elf_howto_table[(int) R_390_GOT32];
203 case BFD_RELOC_390_PLT32:
204 return &elf_howto_table[(int) R_390_PLT32];
205 case BFD_RELOC_390_COPY:
206 return &elf_howto_table[(int) R_390_COPY];
207 case BFD_RELOC_390_GLOB_DAT:
208 return &elf_howto_table[(int) R_390_GLOB_DAT];
209 case BFD_RELOC_390_JMP_SLOT:
210 return &elf_howto_table[(int) R_390_JMP_SLOT];
211 case BFD_RELOC_390_RELATIVE:
212 return &elf_howto_table[(int) R_390_RELATIVE];
213 case BFD_RELOC_32_GOTOFF:
214 return &elf_howto_table[(int) R_390_GOTOFF32];
215 case BFD_RELOC_390_GOTPC:
216 return &elf_howto_table[(int) R_390_GOTPC];
217 case BFD_RELOC_390_GOT16:
218 return &elf_howto_table[(int) R_390_GOT16];
219 case BFD_RELOC_16_PCREL:
220 return &elf_howto_table[(int) R_390_PC16];
221 case BFD_RELOC_390_PC12DBL:
222 return &elf_howto_table[(int) R_390_PC12DBL];
223 case BFD_RELOC_390_PLT12DBL:
224 return &elf_howto_table[(int) R_390_PLT12DBL];
225 case BFD_RELOC_390_PC16DBL:
226 return &elf_howto_table[(int) R_390_PC16DBL];
227 case BFD_RELOC_390_PLT16DBL:
228 return &elf_howto_table[(int) R_390_PLT16DBL];
229 case BFD_RELOC_390_PC24DBL:
230 return &elf_howto_table[(int) R_390_PC24DBL];
231 case BFD_RELOC_390_PLT24DBL:
232 return &elf_howto_table[(int) R_390_PLT24DBL];
233 case BFD_RELOC_390_PC32DBL:
234 return &elf_howto_table[(int) R_390_PC32DBL];
235 case BFD_RELOC_390_PLT32DBL:
236 return &elf_howto_table[(int) R_390_PLT32DBL];
237 case BFD_RELOC_390_GOTPCDBL:
238 return &elf_howto_table[(int) R_390_GOTPCDBL];
239 case BFD_RELOC_390_GOTENT:
240 return &elf_howto_table[(int) R_390_GOTENT];
241 case BFD_RELOC_16_GOTOFF:
242 return &elf_howto_table[(int) R_390_GOTOFF16];
243 case BFD_RELOC_390_GOTPLT12:
244 return &elf_howto_table[(int) R_390_GOTPLT12];
245 case BFD_RELOC_390_GOTPLT16:
246 return &elf_howto_table[(int) R_390_GOTPLT16];
247 case BFD_RELOC_390_GOTPLT32:
248 return &elf_howto_table[(int) R_390_GOTPLT32];
249 case BFD_RELOC_390_GOTPLTENT:
250 return &elf_howto_table[(int) R_390_GOTPLTENT];
251 case BFD_RELOC_390_PLTOFF16:
252 return &elf_howto_table[(int) R_390_PLTOFF16];
253 case BFD_RELOC_390_PLTOFF32:
254 return &elf_howto_table[(int) R_390_PLTOFF32];
255 case BFD_RELOC_390_TLS_LOAD:
256 return &elf_howto_table[(int) R_390_TLS_LOAD];
257 case BFD_RELOC_390_TLS_GDCALL:
258 return &elf_howto_table[(int) R_390_TLS_GDCALL];
259 case BFD_RELOC_390_TLS_LDCALL:
260 return &elf_howto_table[(int) R_390_TLS_LDCALL];
261 case BFD_RELOC_390_TLS_GD32:
262 return &elf_howto_table[(int) R_390_TLS_GD32];
263 case BFD_RELOC_390_TLS_GOTIE12:
264 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
265 case BFD_RELOC_390_TLS_GOTIE32:
266 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
267 case BFD_RELOC_390_TLS_LDM32:
268 return &elf_howto_table[(int) R_390_TLS_LDM32];
269 case BFD_RELOC_390_TLS_IE32:
270 return &elf_howto_table[(int) R_390_TLS_IE32];
271 case BFD_RELOC_390_TLS_IEENT:
272 return &elf_howto_table[(int) R_390_TLS_IEENT];
273 case BFD_RELOC_390_TLS_LE32:
274 return &elf_howto_table[(int) R_390_TLS_LE32];
275 case BFD_RELOC_390_TLS_LDO32:
276 return &elf_howto_table[(int) R_390_TLS_LDO32];
277 case BFD_RELOC_390_TLS_DTPMOD:
278 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
279 case BFD_RELOC_390_TLS_DTPOFF:
280 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
281 case BFD_RELOC_390_TLS_TPOFF:
282 return &elf_howto_table[(int) R_390_TLS_TPOFF];
283 case BFD_RELOC_390_20:
284 return &elf_howto_table[(int) R_390_20];
285 case BFD_RELOC_390_GOT20:
286 return &elf_howto_table[(int) R_390_GOT20];
287 case BFD_RELOC_390_GOTPLT20:
288 return &elf_howto_table[(int) R_390_GOTPLT20];
289 case BFD_RELOC_390_TLS_GOTIE20:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
291 case BFD_RELOC_390_IRELATIVE:
292 return &elf_howto_table[(int) R_390_IRELATIVE];
293 case BFD_RELOC_VTABLE_INHERIT:
294 return &elf32_s390_vtinherit_howto;
295 case BFD_RELOC_VTABLE_ENTRY:
296 return &elf32_s390_vtentry_howto;
303 static reloc_howto_type *
304 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
309 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
310 if (elf_howto_table[i].name != NULL
311 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
312 return &elf_howto_table[i];
314 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
315 return &elf32_s390_vtinherit_howto;
316 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
317 return &elf32_s390_vtentry_howto;
322 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
323 and elf32-s390.c has its own copy. */
326 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
328 Elf_Internal_Rela *dst)
330 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
333 case R_390_GNU_VTINHERIT:
334 cache_ptr->howto = &elf32_s390_vtinherit_howto;
337 case R_390_GNU_VTENTRY:
338 cache_ptr->howto = &elf32_s390_vtentry_howto;
342 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
344 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
348 cache_ptr->howto = &elf_howto_table[r_type];
352 /* A relocation function which doesn't do anything. */
353 static bfd_reloc_status_type
354 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
355 arelent *reloc_entry,
356 asymbol *symbol ATTRIBUTE_UNUSED,
357 void * data ATTRIBUTE_UNUSED,
358 asection *input_section,
360 char **error_message ATTRIBUTE_UNUSED)
363 reloc_entry->address += input_section->output_offset;
367 /* Handle the large displacement relocs. */
368 static bfd_reloc_status_type
369 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
370 arelent *reloc_entry,
372 void * data ATTRIBUTE_UNUSED,
373 asection *input_section,
375 char **error_message ATTRIBUTE_UNUSED)
377 reloc_howto_type *howto = reloc_entry->howto;
381 if (output_bfd != (bfd *) NULL
382 && (symbol->flags & BSF_SECTION_SYM) == 0
383 && (! howto->partial_inplace
384 || reloc_entry->addend == 0))
386 reloc_entry->address += input_section->output_offset;
390 if (output_bfd != NULL)
391 return bfd_reloc_continue;
393 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
394 return bfd_reloc_outofrange;
396 relocation = (symbol->value
397 + symbol->section->output_section->vma
398 + symbol->section->output_offset);
399 relocation += reloc_entry->addend;
400 if (howto->pc_relative)
402 relocation -= (input_section->output_section->vma
403 + input_section->output_offset);
404 relocation -= reloc_entry->address;
407 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
408 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
409 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
411 if ((bfd_signed_vma) relocation < - 0x80000
412 || (bfd_signed_vma) relocation > 0x7ffff)
413 return bfd_reloc_overflow;
419 elf_s390_is_local_label_name (bfd *abfd, const char *name)
421 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
424 return _bfd_elf_is_local_label_name (abfd, name);
427 /* Functions for the 390 ELF linker. */
429 /* The name of the dynamic interpreter. This is put in the .interp
432 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
434 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
435 copying dynamic variables from a shared lib into an app's dynbss
436 section, and instead use a dynamic relocation to point into the
438 #define ELIMINATE_COPY_RELOCS 1
440 /* The size in bytes of the first entry in the procedure linkage table. */
441 #define PLT_FIRST_ENTRY_SIZE 32
442 /* The size in bytes of an entry in the procedure linkage table. */
443 #define PLT_ENTRY_SIZE 32
445 #define GOT_ENTRY_SIZE 4
447 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
449 /* The first three entries in a procedure linkage table are reserved,
450 and the initial contents are unimportant (we zero them out).
451 Subsequent entries look like this. See the SVR4 ABI 386
452 supplement to see how this works. */
454 /* For the s390, simple addr offset can only be 0 - 4096.
455 To use the full 2 GB address space, several instructions
456 are needed to load an address in a register and execute
457 a branch( or just saving the address)
459 Furthermore, only r 0 and 1 are free to use!!! */
461 /* The first 3 words in the GOT are then reserved.
462 Word 0 is the address of the dynamic table.
463 Word 1 is a pointer to a structure describing the object
464 Word 2 is used to point to the loader entry address.
466 The code for position independent PLT entries looks like this:
468 r12 holds addr of the current GOT at entry to the PLT
470 The GOT holds the address in the PLT to be executed.
471 The loader then gets:
472 24(15) = Pointer to the structure describing the object.
473 28(15) = Offset into rela.plt
475 The loader must then find the module where the function is
476 and insert the address in the GOT.
478 Note: 390 can only address +- 64 K relative.
479 We check if offset > 65536, then make a relative branch -64xxx
480 back to a previous defined branch
482 PLT1: BASR 1,0 # 2 bytes
483 L 1,22(1) # 4 bytes Load offset in GOT in r 1
484 L 1,(1,12) # 4 bytes Load address from GOT in r1
485 BCR 15,1 # 2 bytes Jump to address
486 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
487 L 1,14(1) # 4 bytes Load offset in symol table in r1
488 BRC 15,-x # 4 bytes Jump to start of PLT
489 .word 0 # 2 bytes filler
490 .long ? # 4 bytes offset in GOT
491 .long ? # 4 bytes offset into rela.plt
493 This was the general case. There are two additional, optimizes PLT
494 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
495 First the one for GOT offsets < 4096:
497 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
498 BCR 15,1 # 2 bytes Jump to address
499 .word 0,0,0 # 6 bytes filler
500 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
501 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
502 BRC 15,-x # 4 bytes Jump to start of PLT
503 .word 0,0,0 # 6 bytes filler
504 .long ? # 4 bytes offset into rela.plt
506 Second the one for GOT offsets < 32768:
508 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
509 L 1,(1,12) # 4 bytes Load address from GOT to r1
510 BCR 15,1 # 2 bytes Jump to address
511 .word 0 # 2 bytes filler
512 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
513 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
514 BRC 15,-x # 4 bytes Jump to start of PLT
515 .word 0,0,0 # 6 bytes filler
516 .long ? # 4 bytes offset into rela.plt
518 Total = 32 bytes per PLT entry
520 The code for static build PLT entries looks like this:
522 PLT1: BASR 1,0 # 2 bytes
523 L 1,22(1) # 4 bytes Load address of GOT entry
524 L 1,0(0,1) # 4 bytes Load address from GOT in r1
525 BCR 15,1 # 2 bytes Jump to address
526 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
527 L 1,14(1) # 4 bytes Load offset in symbol table in r1
528 BRC 15,-x # 4 bytes Jump to start of PLT
529 .word 0 # 2 bytes filler
530 .long ? # 4 bytes address of GOT entry
531 .long ? # 4 bytes offset into rela.plt */
533 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
535 0x0d, 0x10, /* basr %r1,%r0 */
536 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
537 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
538 0x07, 0xf1, /* br %r1 */
539 0x0d, 0x10, /* basr %r1,%r0 */
540 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
541 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
542 0x00, 0x00, /* padding */
543 0x00, 0x00, 0x00, 0x00, /* GOT offset */
544 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
547 /* Generic PLT pic entry. */
548 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
550 0x0d, 0x10, /* basr %r1,%r0 */
551 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
552 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
553 0x07, 0xf1, /* br %r1 */
554 0x0d, 0x10, /* basr %r1,%r0 */
555 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
556 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
557 0x00, 0x00, /* padding */
558 0x00, 0x00, 0x00, 0x00, /* GOT offset */
559 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
562 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
563 when generating the PLT slot with the GOT offset. */
564 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
566 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
567 0x07, 0xf1, /* br %r1 */
568 0x00, 0x00, 0x00, 0x00, /* padding */
570 0x0d, 0x10, /* basr %r1,%r0 */
571 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
572 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
573 0x00, 0x00, 0x00, 0x00,
574 0x00, 0x00, 0x00, 0x00
577 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
578 when generating the PLT slot with the GOT offset. */
579 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
581 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
582 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
583 0x07, 0xf1, /* br %r1 */
585 0x0d, 0x10, /* basr %r1,%r0 */
586 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
587 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
588 0x00, 0x00, 0x00, 0x00,
589 0x00, 0x00, 0x00, 0x00,
593 /* The first PLT entry pushes the offset into the rela.plt
594 from R1 onto the stack at 8(15) and the loader object info
595 at 12(15), loads the loader address in R1 and jumps to it. */
597 /* The first entry in the PLT for PIC code:
600 ST 1,28(15) # R1 has offset into rela.plt
601 L 1,4(12) # Get loader ino(object struct address)
602 ST 1,24(15) # Store address
603 L 1,8(12) # Entry address of loader in R1
604 BR 1 # Jump to loader
606 The first entry in the PLT for static code:
609 ST 1,28(15) # R1 has offset into rela.plt
611 L 1,18(0,1) # Get address of GOT
612 MVC 24(4,15),4(1) # Move loader ino to stack
613 L 1,8(1) # Get address of loader
614 BR 1 # Jump to loader
616 .long got # address of GOT */
618 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
620 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
621 0x0d, 0x10, /* basr %r1,%r0 */
622 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
623 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
624 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
625 0x07, 0xf1, /* br %r1 */
626 0x00, 0x00, 0x00, 0x00,
627 0x00, 0x00, 0x00, 0x00,
631 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
633 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
634 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
635 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
636 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
637 0x07, 0xf1, /* br %r1 */
638 0x00, 0x00, 0x00, 0x00,
639 0x00, 0x00, 0x00, 0x00,
640 0x00, 0x00, 0x00, 0x00,
645 /* s390 ELF linker hash entry. */
647 struct elf_s390_link_hash_entry
649 struct elf_link_hash_entry elf;
651 /* Track dynamic relocs copied for this symbol. */
652 struct elf_dyn_relocs *dyn_relocs;
654 /* Number of GOTPLT references for a function. */
655 bfd_signed_vma gotplt_refcount;
657 #define GOT_UNKNOWN 0
661 #define GOT_TLS_IE_NLT 4
662 unsigned char tls_type;
664 /* For pointer equality reasons we might need to change the symbol
665 type from STT_GNU_IFUNC to STT_FUNC together with its value and
666 section entry. So after alloc_dynrelocs only these values should
667 be used. In order to check whether a symbol is IFUNC use
668 s390_is_ifunc_symbol_p. */
669 bfd_vma ifunc_resolver_address;
670 asection *ifunc_resolver_section;
673 #define elf_s390_hash_entry(ent) \
674 ((struct elf_s390_link_hash_entry *)(ent))
676 /* This structure represents an entry in the local PLT list needed for
677 local IFUNC symbols. */
680 /* The section of the local symbol.
681 Set in relocate_section and used in finish_dynamic_sections. */
686 bfd_signed_vma refcount;
691 /* NOTE: Keep this structure in sync with
692 the one declared in elf64-s390.c. */
693 struct elf_s390_obj_tdata
695 struct elf_obj_tdata root;
697 /* A local PLT is needed for ifunc symbols. */
698 struct plt_entry *local_plt;
700 /* TLS type for each local got entry. */
701 char *local_got_tls_type;
704 #define elf_s390_tdata(abfd) \
705 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
707 #define elf_s390_local_plt(abfd) \
708 (elf_s390_tdata (abfd)->local_plt)
710 #define elf_s390_local_got_tls_type(abfd) \
711 (elf_s390_tdata (abfd)->local_got_tls_type)
713 #define is_s390_elf(bfd) \
714 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
715 && elf_tdata (bfd) != NULL \
716 && elf_object_id (bfd) == S390_ELF_DATA)
719 elf_s390_mkobject (bfd *abfd)
721 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
726 elf_s390_object_p (bfd *abfd)
728 /* Set the right machine number for an s390 elf32 file. */
729 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
732 /* s390 ELF linker hash table. */
734 struct elf_s390_link_hash_table
736 struct elf_link_hash_table elf;
738 /* Short-cuts to get to dynamic linker sections. */
745 bfd_signed_vma refcount;
749 /* Small local sym cache. */
750 struct sym_cache sym_cache;
753 /* Get the s390 ELF linker hash table from a link_info structure. */
755 #define elf_s390_hash_table(p) \
756 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
757 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
760 #include "elf-s390-common.c"
762 /* Create an entry in an s390 ELF linker hash table. */
764 static struct bfd_hash_entry *
765 link_hash_newfunc (struct bfd_hash_entry *entry,
766 struct bfd_hash_table *table,
769 /* Allocate the structure if it has not already been allocated by a
773 entry = bfd_hash_allocate (table,
774 sizeof (struct elf_s390_link_hash_entry));
779 /* Call the allocation method of the superclass. */
780 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
783 struct elf_s390_link_hash_entry *eh;
785 eh = (struct elf_s390_link_hash_entry *) entry;
786 eh->dyn_relocs = NULL;
787 eh->gotplt_refcount = 0;
788 eh->tls_type = GOT_UNKNOWN;
789 eh->ifunc_resolver_address = 0;
790 eh->ifunc_resolver_section = NULL;
796 /* Create an s390 ELF linker hash table. */
798 static struct bfd_link_hash_table *
799 elf_s390_link_hash_table_create (bfd *abfd)
801 struct elf_s390_link_hash_table *ret;
802 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
809 sizeof (struct elf_s390_link_hash_entry),
816 return &ret->elf.root;
819 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
820 shortcuts to them in our hash table. */
823 create_got_section (bfd *dynobj, struct bfd_link_info *info)
825 struct elf_s390_link_hash_table *htab;
827 if (! _bfd_elf_create_got_section (dynobj, info))
830 htab = elf_s390_hash_table (info);
831 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
832 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
833 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
834 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
840 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
841 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
845 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
847 struct elf_s390_link_hash_table *htab;
849 htab = elf_s390_hash_table (info);
850 if (!htab->elf.sgot && !create_got_section (dynobj, info))
853 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
856 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
857 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
858 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
859 if (!bfd_link_pic (info))
860 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
862 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
863 || (!bfd_link_pic (info) && !htab->srelbss))
869 /* Copy the extra info we tack onto an elf_link_hash_entry. */
872 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
873 struct elf_link_hash_entry *dir,
874 struct elf_link_hash_entry *ind)
876 struct elf_s390_link_hash_entry *edir, *eind;
878 edir = (struct elf_s390_link_hash_entry *) dir;
879 eind = (struct elf_s390_link_hash_entry *) ind;
881 if (eind->dyn_relocs != NULL)
883 if (edir->dyn_relocs != NULL)
885 struct elf_dyn_relocs **pp;
886 struct elf_dyn_relocs *p;
888 /* Add reloc counts against the indirect sym to the direct sym
889 list. Merge any entries against the same section. */
890 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
892 struct elf_dyn_relocs *q;
894 for (q = edir->dyn_relocs; q != NULL; q = q->next)
895 if (q->sec == p->sec)
897 q->pc_count += p->pc_count;
898 q->count += p->count;
905 *pp = edir->dyn_relocs;
908 edir->dyn_relocs = eind->dyn_relocs;
909 eind->dyn_relocs = NULL;
912 if (ind->root.type == bfd_link_hash_indirect
913 && dir->got.refcount <= 0)
915 edir->tls_type = eind->tls_type;
916 eind->tls_type = GOT_UNKNOWN;
919 if (ELIMINATE_COPY_RELOCS
920 && ind->root.type != bfd_link_hash_indirect
921 && dir->dynamic_adjusted)
923 /* If called to transfer flags for a weakdef during processing
924 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
925 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
926 dir->ref_dynamic |= ind->ref_dynamic;
927 dir->ref_regular |= ind->ref_regular;
928 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
929 dir->needs_plt |= ind->needs_plt;
932 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
936 elf_s390_tls_transition (struct bfd_link_info *info,
940 if (bfd_link_pic (info))
948 return R_390_TLS_LE32;
949 return R_390_TLS_IE32;
950 case R_390_TLS_GOTIE32:
952 return R_390_TLS_LE32;
953 return R_390_TLS_GOTIE32;
954 case R_390_TLS_LDM32:
955 return R_390_TLS_LE32;
961 /* Look through the relocs for a section during the first phase, and
962 allocate space in the global offset table or procedure linkage
966 elf_s390_check_relocs (bfd *abfd,
967 struct bfd_link_info *info,
969 const Elf_Internal_Rela *relocs)
971 struct elf_s390_link_hash_table *htab;
972 Elf_Internal_Shdr *symtab_hdr;
973 struct elf_link_hash_entry **sym_hashes;
974 const Elf_Internal_Rela *rel;
975 const Elf_Internal_Rela *rel_end;
977 bfd_signed_vma *local_got_refcounts;
978 int tls_type, old_tls_type;
979 Elf_Internal_Sym *isym;
981 if (bfd_link_relocatable (info))
984 BFD_ASSERT (is_s390_elf (abfd));
986 htab = elf_s390_hash_table (info);
987 symtab_hdr = &elf_symtab_hdr (abfd);
988 sym_hashes = elf_sym_hashes (abfd);
989 local_got_refcounts = elf_local_got_refcounts (abfd);
993 rel_end = relocs + sec->reloc_count;
994 for (rel = relocs; rel < rel_end; rel++)
997 unsigned long r_symndx;
998 struct elf_link_hash_entry *h;
1000 r_symndx = ELF32_R_SYM (rel->r_info);
1002 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1004 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1009 if (r_symndx < symtab_hdr->sh_info)
1011 /* A local symbol. */
1012 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1017 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1019 struct plt_entry *plt;
1021 if (htab->elf.dynobj == NULL)
1022 htab->elf.dynobj = abfd;
1024 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1027 if (local_got_refcounts == NULL)
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1033 plt = elf_s390_local_plt (abfd);
1034 plt[r_symndx].plt.refcount++;
1040 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1041 while (h->root.type == bfd_link_hash_indirect
1042 || h->root.type == bfd_link_hash_warning)
1043 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1045 /* PR15323, ref flags aren't set for references in the same
1047 h->root.non_ir_ref = 1;
1050 /* Create got section and local_got_refcounts array if they
1052 r_type = elf_s390_tls_transition (info,
1053 ELF32_R_TYPE (rel->r_info),
1062 case R_390_GOTPLT12:
1063 case R_390_GOTPLT16:
1064 case R_390_GOTPLT20:
1065 case R_390_GOTPLT32:
1066 case R_390_GOTPLTENT:
1067 case R_390_TLS_GD32:
1068 case R_390_TLS_GOTIE12:
1069 case R_390_TLS_GOTIE20:
1070 case R_390_TLS_GOTIE32:
1071 case R_390_TLS_IEENT:
1072 case R_390_TLS_IE32:
1073 case R_390_TLS_LDM32:
1075 && local_got_refcounts == NULL)
1077 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1079 local_got_refcounts = elf_local_got_refcounts (abfd);
1082 case R_390_GOTOFF16:
1083 case R_390_GOTOFF32:
1085 case R_390_GOTPCDBL:
1086 if (htab->elf.sgot == NULL)
1088 if (htab->elf.dynobj == NULL)
1089 htab->elf.dynobj = abfd;
1090 if (!create_got_section (htab->elf.dynobj, info))
1097 if (htab->elf.dynobj == NULL)
1098 htab->elf.dynobj = abfd;
1099 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1102 /* Make sure an IFUNC symbol defined in a non-shared object
1103 always gets a PLT slot. */
1104 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1106 /* The symbol is called by the dynamic loader in order
1107 to resolve the relocation. So it is in fact also
1116 case R_390_GOTPCDBL:
1117 /* These relocs do not need a GOT slot. They just load the
1118 GOT pointer itself or address something else relative to
1119 the GOT. Since the GOT pointer has been set up above we
1122 case R_390_GOTOFF16:
1123 case R_390_GOTOFF32:
1124 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1127 case R_390_PLT12DBL:
1128 case R_390_PLT16DBL:
1129 case R_390_PLT24DBL:
1130 case R_390_PLT32DBL:
1132 case R_390_PLTOFF16:
1133 case R_390_PLTOFF32:
1134 /* This symbol requires a procedure linkage table entry. We
1135 actually build the entry in adjust_dynamic_symbol,
1136 because this might be a case of linking PIC code which is
1137 never referenced by a dynamic object, in which case we
1138 don't need to generate a procedure linkage table entry
1141 /* If this is a local symbol, we resolve it directly without
1142 creating a procedure linkage table entry. */
1146 h->plt.refcount += 1;
1150 case R_390_GOTPLT12:
1151 case R_390_GOTPLT16:
1152 case R_390_GOTPLT20:
1153 case R_390_GOTPLT32:
1154 case R_390_GOTPLTENT:
1155 /* This symbol requires either a procedure linkage table entry
1156 or an entry in the local got. We actually build the entry
1157 in adjust_dynamic_symbol because whether this is really a
1158 global reference can change and with it the fact if we have
1159 to create a plt entry or a local got entry. To be able to
1160 make a once global symbol a local one we have to keep track
1161 of the number of gotplt references that exist for this
1165 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1167 h->plt.refcount += 1;
1170 local_got_refcounts[r_symndx] += 1;
1173 case R_390_TLS_LDM32:
1174 htab->tls_ldm_got.refcount += 1;
1177 case R_390_TLS_IE32:
1178 case R_390_TLS_GOTIE12:
1179 case R_390_TLS_GOTIE20:
1180 case R_390_TLS_GOTIE32:
1181 case R_390_TLS_IEENT:
1182 if (bfd_link_pic (info))
1183 info->flags |= DF_STATIC_TLS;
1191 case R_390_TLS_GD32:
1192 /* This symbol requires a global offset table entry. */
1201 tls_type = GOT_NORMAL;
1203 case R_390_TLS_GD32:
1204 tls_type = GOT_TLS_GD;
1206 case R_390_TLS_IE32:
1207 case R_390_TLS_GOTIE32:
1208 tls_type = GOT_TLS_IE;
1210 case R_390_TLS_GOTIE12:
1211 case R_390_TLS_GOTIE20:
1212 case R_390_TLS_IEENT:
1213 tls_type = GOT_TLS_IE_NLT;
1219 h->got.refcount += 1;
1220 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1224 local_got_refcounts[r_symndx] += 1;
1225 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1227 /* If a TLS symbol is accessed using IE at least once,
1228 there is no point to use dynamic model for it. */
1229 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1231 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1233 (*_bfd_error_handler)
1234 (_("%B: `%s' accessed both as normal and thread local symbol"),
1235 abfd, h->root.root.string);
1238 if (old_tls_type > tls_type)
1239 tls_type = old_tls_type;
1242 if (old_tls_type != tls_type)
1245 elf_s390_hash_entry (h)->tls_type = tls_type;
1247 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1250 if (r_type != R_390_TLS_IE32)
1254 case R_390_TLS_LE32:
1255 /* For static linking and executables this reloc will be
1256 calculated at linktime otherwise a TLS_TPOFF runtime
1257 reloc will be generated. */
1258 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1261 if (!bfd_link_pic (info))
1263 info->flags |= DF_STATIC_TLS;
1275 if (h != NULL && bfd_link_executable (info))
1277 /* If this reloc is in a read-only section, we might
1278 need a copy reloc. We can't check reliably at this
1279 stage whether the section is read-only, as input
1280 sections have not yet been mapped to output sections.
1281 Tentatively set the flag for now, and correct in
1282 adjust_dynamic_symbol. */
1285 if (!bfd_link_pic (info))
1287 /* We may need a .plt entry if the function this reloc
1288 refers to is in a shared lib. */
1289 h->plt.refcount += 1;
1293 /* If we are creating a shared library, and this is a reloc
1294 against a global symbol, or a non PC relative reloc
1295 against a local symbol, then we need to copy the reloc
1296 into the shared library. However, if we are linking with
1297 -Bsymbolic, we do not need to copy a reloc against a
1298 global symbol which is defined in an object we are
1299 including in the link (i.e., DEF_REGULAR is set). At
1300 this point we have not seen all the input files, so it is
1301 possible that DEF_REGULAR is not set now but will be set
1302 later (it is never cleared). In case of a weak definition,
1303 DEF_REGULAR may be cleared later by a strong definition in
1304 a shared library. We account for that possibility below by
1305 storing information in the relocs_copied field of the hash
1306 table entry. A similar situation occurs when creating
1307 shared libraries and symbol visibility changes render the
1310 If on the other hand, we are creating an executable, we
1311 may need to keep relocations for symbols satisfied by a
1312 dynamic library if we manage to avoid copy relocs for the
1314 if ((bfd_link_pic (info)
1315 && (sec->flags & SEC_ALLOC) != 0
1316 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1317 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1318 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1319 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1320 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1321 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1323 && (! SYMBOLIC_BIND (info, h)
1324 || h->root.type == bfd_link_hash_defweak
1325 || !h->def_regular))))
1326 || (ELIMINATE_COPY_RELOCS
1327 && !bfd_link_pic (info)
1328 && (sec->flags & SEC_ALLOC) != 0
1330 && (h->root.type == bfd_link_hash_defweak
1331 || !h->def_regular)))
1333 struct elf_dyn_relocs *p;
1334 struct elf_dyn_relocs **head;
1336 /* We must copy these reloc types into the output file.
1337 Create a reloc section in dynobj and make room for
1341 if (htab->elf.dynobj == NULL)
1342 htab->elf.dynobj = abfd;
1344 sreloc = _bfd_elf_make_dynamic_reloc_section
1345 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1351 /* If this is a global symbol, we count the number of
1352 relocations we need for this symbol. */
1355 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1359 /* Track dynamic relocs needed for local syms too.
1360 We really need local syms available to do this
1365 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1370 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1374 vpp = &elf_section_data (s)->local_dynrel;
1375 head = (struct elf_dyn_relocs **) vpp;
1379 if (p == NULL || p->sec != sec)
1381 bfd_size_type amt = sizeof *p;
1383 p = ((struct elf_dyn_relocs *)
1384 bfd_alloc (htab->elf.dynobj, amt));
1395 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1396 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1397 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1398 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1399 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1400 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1405 /* This relocation describes the C++ object vtable hierarchy.
1406 Reconstruct it for later use during GC. */
1407 case R_390_GNU_VTINHERIT:
1408 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1412 /* This relocation describes which C++ vtable entries are actually
1413 used. Record for later use during GC. */
1414 case R_390_GNU_VTENTRY:
1415 BFD_ASSERT (h != NULL);
1417 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1429 /* Return the section that should be marked against GC for a given
1433 elf_s390_gc_mark_hook (asection *sec,
1434 struct bfd_link_info *info,
1435 Elf_Internal_Rela *rel,
1436 struct elf_link_hash_entry *h,
1437 Elf_Internal_Sym *sym)
1440 switch (ELF32_R_TYPE (rel->r_info))
1442 case R_390_GNU_VTINHERIT:
1443 case R_390_GNU_VTENTRY:
1446 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1450 /* Update the got entry reference counts for the section being removed. */
1453 elf_s390_gc_sweep_hook (bfd *abfd,
1454 struct bfd_link_info *info,
1456 const Elf_Internal_Rela *relocs)
1458 struct elf_s390_link_hash_table *htab;
1459 Elf_Internal_Shdr *symtab_hdr;
1460 struct elf_link_hash_entry **sym_hashes;
1461 bfd_signed_vma *local_got_refcounts;
1462 const Elf_Internal_Rela *rel, *relend;
1464 if (bfd_link_relocatable (info))
1467 htab = elf_s390_hash_table (info);
1471 elf_section_data (sec)->local_dynrel = NULL;
1473 symtab_hdr = &elf_symtab_hdr (abfd);
1474 sym_hashes = elf_sym_hashes (abfd);
1475 local_got_refcounts = elf_local_got_refcounts (abfd);
1477 relend = relocs + sec->reloc_count;
1478 for (rel = relocs; rel < relend; rel++)
1480 unsigned long r_symndx;
1481 unsigned int r_type;
1482 struct elf_link_hash_entry *h = NULL;
1484 r_symndx = ELF32_R_SYM (rel->r_info);
1485 if (r_symndx >= symtab_hdr->sh_info)
1487 struct elf_s390_link_hash_entry *eh;
1488 struct elf_dyn_relocs **pp;
1489 struct elf_dyn_relocs *p;
1491 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1492 while (h->root.type == bfd_link_hash_indirect
1493 || h->root.type == bfd_link_hash_warning)
1494 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1495 eh = (struct elf_s390_link_hash_entry *) h;
1497 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1500 /* Everything must go for SEC. */
1507 Elf_Internal_Sym *isym;
1509 /* A local symbol. */
1510 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1515 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1517 struct plt_entry *plt = elf_s390_local_plt (abfd);
1518 if (plt[r_symndx].plt.refcount > 0)
1519 plt[r_symndx].plt.refcount--;
1523 r_type = ELF32_R_TYPE (rel->r_info);
1524 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1527 case R_390_TLS_LDM32:
1528 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1529 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1532 case R_390_GOTOFF16:
1533 case R_390_GOTOFF32:
1534 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1541 case R_390_GOTPCDBL:
1544 case R_390_TLS_GD32:
1545 case R_390_TLS_IE32:
1546 case R_390_TLS_GOTIE12:
1547 case R_390_TLS_GOTIE20:
1548 case R_390_TLS_GOTIE32:
1549 case R_390_TLS_IEENT:
1557 if (h->got.refcount > 0)
1558 h->got.refcount -= 1;
1560 else if (local_got_refcounts != NULL)
1562 if (local_got_refcounts[r_symndx] > 0)
1563 local_got_refcounts[r_symndx] -= 1;
1578 if (bfd_link_pic (info))
1582 case R_390_PLT12DBL:
1583 case R_390_PLT16DBL:
1584 case R_390_PLT24DBL:
1585 case R_390_PLT32DBL:
1587 case R_390_PLTOFF16:
1588 case R_390_PLTOFF32:
1591 if (h->plt.refcount > 0)
1592 h->plt.refcount -= 1;
1596 case R_390_GOTPLT12:
1597 case R_390_GOTPLT16:
1598 case R_390_GOTPLT20:
1599 case R_390_GOTPLT32:
1600 case R_390_GOTPLTENT:
1603 if (h->plt.refcount > 0)
1605 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1606 h->plt.refcount -= 1;
1609 else if (local_got_refcounts != NULL)
1611 if (local_got_refcounts[r_symndx] > 0)
1612 local_got_refcounts[r_symndx] -= 1;
1624 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1625 entry but we found we will not create any. Called when we find we will
1626 not have any PLT for this symbol, by for example
1627 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1628 or elf_s390_size_dynamic_sections if no dynamic sections will be
1629 created (we're only linking static objects). */
1632 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1634 if (h->elf.root.type == bfd_link_hash_warning)
1635 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1637 if (h->gotplt_refcount <= 0)
1640 /* We simply add the number of gotplt references to the number
1641 * of got references for this symbol. */
1642 h->elf.got.refcount += h->gotplt_refcount;
1643 h->gotplt_refcount = -1;
1646 /* Adjust a symbol defined by a dynamic object and referenced by a
1647 regular object. The current definition is in some section of the
1648 dynamic object, but we're not including those sections. We have to
1649 change the definition to something the rest of the link can
1653 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1654 struct elf_link_hash_entry *h)
1656 struct elf_s390_link_hash_table *htab;
1659 /* STT_GNU_IFUNC symbol must go through PLT. */
1660 if (s390_is_ifunc_symbol_p (h))
1662 /* All local STT_GNU_IFUNC references must be treated as local
1663 calls via local PLT. */
1664 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1666 bfd_size_type pc_count = 0, count = 0;
1667 struct elf_dyn_relocs **pp;
1668 struct elf_s390_link_hash_entry *eh;
1669 struct elf_dyn_relocs *p;
1671 eh = (struct elf_s390_link_hash_entry *) h;
1672 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1674 pc_count += p->pc_count;
1675 p->count -= p->pc_count;
1684 if (pc_count || count)
1688 if (h->plt.refcount <= 0)
1689 h->plt.refcount = 1;
1691 h->plt.refcount += 1;
1695 if (h->plt.refcount <= 0)
1697 h->plt.offset = (bfd_vma) -1;
1703 /* If this is a function, put it in the procedure linkage table. We
1704 will fill in the contents of the procedure linkage table later
1705 (although we could actually do it here). */
1706 if (h->type == STT_FUNC
1709 if (h->plt.refcount <= 0
1710 || SYMBOL_CALLS_LOCAL (info, h)
1711 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1712 && h->root.type != bfd_link_hash_undefweak))
1714 /* This case can occur if we saw a PLT32 reloc in an input
1715 file, but the symbol was never referred to by a dynamic
1716 object, or if all references were garbage collected. In
1717 such a case, we don't actually need to build a procedure
1718 linkage table, and we can just do a PC32 reloc instead. */
1719 h->plt.offset = (bfd_vma) -1;
1721 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1727 /* It's possible that we incorrectly decided a .plt reloc was
1728 needed for an R_390_PC32 reloc to a non-function sym in
1729 check_relocs. We can't decide accurately between function and
1730 non-function syms in check-relocs; Objects loaded later in
1731 the link may change h->type. So fix it now. */
1732 h->plt.offset = (bfd_vma) -1;
1734 /* If this is a weak symbol, and there is a real definition, the
1735 processor independent code will have arranged for us to see the
1736 real definition first, and we can just use the same value. */
1737 if (h->u.weakdef != NULL)
1739 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1740 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1741 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1742 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1743 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1744 h->non_got_ref = h->u.weakdef->non_got_ref;
1748 /* This is a reference to a symbol defined by a dynamic object which
1749 is not a function. */
1751 /* If we are creating a shared library, we must presume that the
1752 only references to the symbol are via the global offset table.
1753 For such cases we need not do anything here; the relocations will
1754 be handled correctly by relocate_section. */
1755 if (bfd_link_pic (info))
1758 /* If there are no references to this symbol that do not use the
1759 GOT, we don't need to generate a copy reloc. */
1760 if (!h->non_got_ref)
1763 /* If -z nocopyreloc was given, we won't generate them either. */
1764 if (info->nocopyreloc)
1770 if (ELIMINATE_COPY_RELOCS)
1772 struct elf_s390_link_hash_entry * eh;
1773 struct elf_dyn_relocs *p;
1775 eh = (struct elf_s390_link_hash_entry *) h;
1776 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1778 s = p->sec->output_section;
1779 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1783 /* If we didn't find any dynamic relocs in read-only sections, then
1784 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1792 /* We must allocate the symbol in our .dynbss section, which will
1793 become part of the .bss section of the executable. There will be
1794 an entry for this symbol in the .dynsym section. The dynamic
1795 object will contain position independent code, so all references
1796 from the dynamic object to this symbol will go through the global
1797 offset table. The dynamic linker will use the .dynsym entry to
1798 determine the address it must put in the global offset table, so
1799 both the dynamic object and the regular object will refer to the
1800 same memory location for the variable. */
1802 htab = elf_s390_hash_table (info);
1804 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1805 copy the initial value out of the dynamic object and into the
1806 runtime process image. */
1807 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1809 htab->srelbss->size += sizeof (Elf32_External_Rela);
1815 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1818 /* Allocate space in .plt, .got and associated reloc sections for
1822 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1824 struct bfd_link_info *info;
1825 struct elf_s390_link_hash_table *htab;
1826 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1827 struct elf_dyn_relocs *p;
1829 if (h->root.type == bfd_link_hash_indirect)
1832 info = (struct bfd_link_info *) inf;
1833 htab = elf_s390_hash_table (info);
1835 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1836 here if it is defined and referenced in a non-shared object. */
1837 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1838 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1839 else if (htab->elf.dynamic_sections_created
1840 && h->plt.refcount > 0)
1842 /* Make sure this symbol is output as a dynamic symbol.
1843 Undefined weak syms won't yet be marked as dynamic. */
1844 if (h->dynindx == -1
1845 && !h->forced_local)
1847 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1851 if (bfd_link_pic (info)
1852 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1854 asection *s = htab->elf.splt;
1856 /* If this is the first .plt entry, make room for the special
1859 s->size += PLT_FIRST_ENTRY_SIZE;
1861 h->plt.offset = s->size;
1863 /* If this symbol is not defined in a regular file, and we are
1864 not generating a shared library, then set the symbol to this
1865 location in the .plt. This is required to make function
1866 pointers compare as equal between the normal executable and
1867 the shared library. */
1868 if (! bfd_link_pic (info)
1871 h->root.u.def.section = s;
1872 h->root.u.def.value = h->plt.offset;
1875 /* Make room for this entry. */
1876 s->size += PLT_ENTRY_SIZE;
1878 /* We also need to make an entry in the .got.plt section, which
1879 will be placed in the .got section by the linker script. */
1880 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1882 /* We also need to make an entry in the .rela.plt section. */
1883 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1887 h->plt.offset = (bfd_vma) -1;
1889 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1894 h->plt.offset = (bfd_vma) -1;
1896 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1899 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1900 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1901 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1902 we can save the dynamic TLS relocation. */
1903 if (h->got.refcount > 0
1904 && !bfd_link_pic (info)
1906 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1908 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1909 /* For the GOTIE access without a literal pool entry the offset has
1910 to be stored somewhere. The immediate value in the instruction
1911 is not bit enough so the value is stored in the got. */
1913 h->got.offset = htab->elf.sgot->size;
1914 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1917 h->got.offset = (bfd_vma) -1;
1919 else if (h->got.refcount > 0)
1923 int tls_type = elf_s390_hash_entry(h)->tls_type;
1925 /* Make sure this symbol is output as a dynamic symbol.
1926 Undefined weak syms won't yet be marked as dynamic. */
1927 if (h->dynindx == -1
1928 && !h->forced_local)
1930 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1935 h->got.offset = s->size;
1936 s->size += GOT_ENTRY_SIZE;
1937 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1938 if (tls_type == GOT_TLS_GD)
1939 s->size += GOT_ENTRY_SIZE;
1940 dyn = htab->elf.dynamic_sections_created;
1941 /* R_390_TLS_IE32 needs one dynamic relocation,
1942 R_390_TLS_GD32 needs one if local symbol and two if global. */
1943 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1944 || tls_type >= GOT_TLS_IE)
1945 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1946 else if (tls_type == GOT_TLS_GD)
1947 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1948 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1949 || h->root.type != bfd_link_hash_undefweak)
1950 && (bfd_link_pic (info)
1951 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1952 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1955 h->got.offset = (bfd_vma) -1;
1957 if (eh->dyn_relocs == NULL)
1960 /* In the shared -Bsymbolic case, discard space allocated for
1961 dynamic pc-relative relocs against symbols which turn out to be
1962 defined in regular objects. For the normal shared case, discard
1963 space for pc-relative relocs that have become local due to symbol
1964 visibility changes. */
1966 if (bfd_link_pic (info))
1968 if (SYMBOL_CALLS_LOCAL (info, h))
1970 struct elf_dyn_relocs **pp;
1972 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1974 p->count -= p->pc_count;
1983 /* Also discard relocs on undefined weak syms with non-default
1985 if (eh->dyn_relocs != NULL
1986 && h->root.type == bfd_link_hash_undefweak)
1988 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1989 eh->dyn_relocs = NULL;
1991 /* Make sure undefined weak symbols are output as a dynamic
1993 else if (h->dynindx == -1
1994 && !h->forced_local)
1996 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2001 else if (ELIMINATE_COPY_RELOCS)
2003 /* For the non-shared case, discard space for relocs against
2004 symbols which turn out to need copy relocs or are not
2010 || (htab->elf.dynamic_sections_created
2011 && (h->root.type == bfd_link_hash_undefweak
2012 || h->root.type == bfd_link_hash_undefined))))
2014 /* Make sure this symbol is output as a dynamic symbol.
2015 Undefined weak syms won't yet be marked as dynamic. */
2016 if (h->dynindx == -1
2017 && !h->forced_local)
2019 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2023 /* If that succeeded, we know we'll be keeping all the
2025 if (h->dynindx != -1)
2029 eh->dyn_relocs = NULL;
2034 /* Finally, allocate space. */
2035 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2037 asection *sreloc = elf_section_data (p->sec)->sreloc;
2039 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2045 /* Find any dynamic relocs that apply to read-only sections. */
2048 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2050 struct elf_s390_link_hash_entry *eh;
2051 struct elf_dyn_relocs *p;
2053 eh = (struct elf_s390_link_hash_entry *) h;
2054 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2056 asection *s = p->sec->output_section;
2058 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2060 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2062 info->flags |= DF_TEXTREL;
2064 /* Not an error, just cut short the traversal. */
2071 /* Set the sizes of the dynamic sections. */
2074 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2075 struct bfd_link_info *info)
2077 struct elf_s390_link_hash_table *htab;
2083 htab = elf_s390_hash_table (info);
2084 dynobj = htab->elf.dynobj;
2088 if (htab->elf.dynamic_sections_created)
2090 /* Set the contents of the .interp section to the interpreter. */
2091 if (bfd_link_executable (info) && !info->nointerp)
2093 s = bfd_get_linker_section (dynobj, ".interp");
2096 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2097 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2101 /* Set up .got offsets for local syms, and space for local dynamic
2103 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2105 bfd_signed_vma *local_got;
2106 bfd_signed_vma *end_local_got;
2107 char *local_tls_type;
2108 bfd_size_type locsymcount;
2109 Elf_Internal_Shdr *symtab_hdr;
2111 struct plt_entry *local_plt;
2114 if (! is_s390_elf (ibfd))
2117 for (s = ibfd->sections; s != NULL; s = s->next)
2119 struct elf_dyn_relocs *p;
2121 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2123 if (!bfd_is_abs_section (p->sec)
2124 && bfd_is_abs_section (p->sec->output_section))
2126 /* Input section has been discarded, either because
2127 it is a copy of a linkonce section or due to
2128 linker script /DISCARD/, so we'll be discarding
2131 else if (p->count != 0)
2133 srela = elf_section_data (p->sec)->sreloc;
2134 srela->size += p->count * sizeof (Elf32_External_Rela);
2135 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2136 info->flags |= DF_TEXTREL;
2141 local_got = elf_local_got_refcounts (ibfd);
2145 symtab_hdr = &elf_symtab_hdr (ibfd);
2146 locsymcount = symtab_hdr->sh_info;
2147 end_local_got = local_got + locsymcount;
2148 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2150 srela = htab->elf.srelgot;
2151 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2155 *local_got = s->size;
2156 s->size += GOT_ENTRY_SIZE;
2157 if (*local_tls_type == GOT_TLS_GD)
2158 s->size += GOT_ENTRY_SIZE;
2159 if (bfd_link_pic (info))
2160 srela->size += sizeof (Elf32_External_Rela);
2163 *local_got = (bfd_vma) -1;
2165 local_plt = elf_s390_local_plt (ibfd);
2166 for (i = 0; i < symtab_hdr->sh_info; i++)
2168 if (local_plt[i].plt.refcount > 0)
2170 local_plt[i].plt.offset = htab->elf.iplt->size;
2171 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2172 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2173 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2176 local_plt[i].plt.offset = (bfd_vma) -1;
2180 if (htab->tls_ldm_got.refcount > 0)
2182 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2184 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2185 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2186 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2189 htab->tls_ldm_got.offset = -1;
2191 /* Allocate global sym .plt and .got entries, and space for global
2192 sym dynamic relocs. */
2193 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2195 /* We now have determined the sizes of the various dynamic sections.
2196 Allocate memory for them. */
2198 for (s = dynobj->sections; s != NULL; s = s->next)
2200 if ((s->flags & SEC_LINKER_CREATED) == 0)
2203 if (s == htab->elf.splt
2204 || s == htab->elf.sgot
2205 || s == htab->elf.sgotplt
2206 || s == htab->sdynbss
2207 || s == htab->elf.iplt
2208 || s == htab->elf.igotplt
2209 || s == htab->irelifunc)
2211 /* Strip this section if we don't need it; see the
2214 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2219 /* We use the reloc_count field as a counter if we need
2220 to copy relocs into the output file. */
2225 /* It's not one of our sections, so don't allocate space. */
2231 /* If we don't need this section, strip it from the
2232 output file. This is to handle .rela.bss and
2233 .rela.plt. We must create it in
2234 create_dynamic_sections, because it must be created
2235 before the linker maps input sections to output
2236 sections. The linker does that before
2237 adjust_dynamic_symbol is called, and it is that
2238 function which decides whether anything needs to go
2239 into these sections. */
2241 s->flags |= SEC_EXCLUDE;
2245 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2248 /* Allocate memory for the section contents. We use bfd_zalloc
2249 here in case unused entries are not reclaimed before the
2250 section's contents are written out. This should not happen,
2251 but this way if it does, we get a R_390_NONE reloc instead
2253 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2254 if (s->contents == NULL)
2258 if (htab->elf.dynamic_sections_created)
2260 /* Add some entries to the .dynamic section. We fill in the
2261 values later, in elf_s390_finish_dynamic_sections, but we
2262 must add the entries now so that we get the correct size for
2263 the .dynamic section. The DT_DEBUG entry is filled in by the
2264 dynamic linker and used by the debugger. */
2265 #define add_dynamic_entry(TAG, VAL) \
2266 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2268 if (bfd_link_executable (info))
2270 if (!add_dynamic_entry (DT_DEBUG, 0))
2274 if (htab->elf.splt->size != 0)
2276 if (!add_dynamic_entry (DT_PLTGOT, 0)
2277 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2278 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2279 || !add_dynamic_entry (DT_JMPREL, 0))
2285 if (!add_dynamic_entry (DT_RELA, 0)
2286 || !add_dynamic_entry (DT_RELASZ, 0)
2287 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2290 /* If any dynamic relocs apply to a read-only section,
2291 then we need a DT_TEXTREL entry. */
2292 if ((info->flags & DF_TEXTREL) == 0)
2293 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2295 if ((info->flags & DF_TEXTREL) != 0)
2297 if (!add_dynamic_entry (DT_TEXTREL, 0))
2302 #undef add_dynamic_entry
2307 /* Return the base VMA address which should be subtracted from real addresses
2308 when resolving @dtpoff relocation.
2309 This is PT_TLS segment p_vaddr. */
2312 dtpoff_base (struct bfd_link_info *info)
2314 /* If tls_sec is NULL, we should have signalled an error already. */
2315 if (elf_hash_table (info)->tls_sec == NULL)
2317 return elf_hash_table (info)->tls_sec->vma;
2320 /* Return the relocation value for @tpoff relocation
2321 if STT_TLS virtual address is ADDRESS. */
2324 tpoff (struct bfd_link_info *info, bfd_vma address)
2326 struct elf_link_hash_table *htab = elf_hash_table (info);
2328 /* If tls_sec is NULL, we should have signalled an error already. */
2329 if (htab->tls_sec == NULL)
2331 return htab->tls_size + htab->tls_sec->vma - address;
2334 /* Complain if TLS instruction relocation is against an invalid
2338 invalid_tls_insn (bfd *input_bfd,
2339 asection *input_section,
2340 Elf_Internal_Rela *rel)
2342 reloc_howto_type *howto;
2344 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2345 (*_bfd_error_handler)
2346 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2349 (long) rel->r_offset,
2351 bfd_set_error (bfd_error_bad_value);
2354 /* Relocate a 390 ELF section. */
2357 elf_s390_relocate_section (bfd *output_bfd,
2358 struct bfd_link_info *info,
2360 asection *input_section,
2362 Elf_Internal_Rela *relocs,
2363 Elf_Internal_Sym *local_syms,
2364 asection **local_sections)
2366 struct elf_s390_link_hash_table *htab;
2367 Elf_Internal_Shdr *symtab_hdr;
2368 struct elf_link_hash_entry **sym_hashes;
2369 bfd_vma *local_got_offsets;
2370 Elf_Internal_Rela *rel;
2371 Elf_Internal_Rela *relend;
2373 BFD_ASSERT (is_s390_elf (input_bfd));
2375 htab = elf_s390_hash_table (info);
2376 symtab_hdr = &elf_symtab_hdr (input_bfd);
2377 sym_hashes = elf_sym_hashes (input_bfd);
2378 local_got_offsets = elf_local_got_offsets (input_bfd);
2381 relend = relocs + input_section->reloc_count;
2382 for (; rel < relend; rel++)
2384 unsigned int r_type;
2385 reloc_howto_type *howto;
2386 unsigned long r_symndx;
2387 struct elf_link_hash_entry *h;
2388 Elf_Internal_Sym *sym;
2392 bfd_boolean unresolved_reloc;
2393 bfd_reloc_status_type r;
2395 asection *base_got = htab->elf.sgot;
2397 r_type = ELF32_R_TYPE (rel->r_info);
2398 if (r_type == (int) R_390_GNU_VTINHERIT
2399 || r_type == (int) R_390_GNU_VTENTRY)
2401 if (r_type >= (int) R_390_max)
2403 bfd_set_error (bfd_error_bad_value);
2407 howto = elf_howto_table + r_type;
2408 r_symndx = ELF32_R_SYM (rel->r_info);
2413 unresolved_reloc = FALSE;
2414 if (r_symndx < symtab_hdr->sh_info)
2416 sym = local_syms + r_symndx;
2417 sec = local_sections[r_symndx];
2418 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2420 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2421 if (local_plt == NULL)
2424 /* Address of the PLT slot. */
2425 relocation = (htab->elf.iplt->output_section->vma
2426 + htab->elf.iplt->output_offset
2427 + local_plt[r_symndx].plt.offset);
2431 case R_390_PLTOFF16:
2432 case R_390_PLTOFF32:
2433 relocation -= htab->elf.sgot->output_section->vma;
2435 case R_390_GOTPLT12:
2436 case R_390_GOTPLT16:
2437 case R_390_GOTPLT20:
2438 case R_390_GOTPLT32:
2439 case R_390_GOTPLTENT:
2446 /* Write the PLT slot address into the GOT slot. */
2447 bfd_put_32 (output_bfd, relocation,
2448 htab->elf.sgot->contents +
2449 local_got_offsets[r_symndx]);
2450 relocation = (local_got_offsets[r_symndx] +
2451 htab->elf.sgot->output_offset);
2453 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2454 relocation += htab->elf.sgot->output_section->vma;
2460 /* The output section is needed later in
2461 finish_dynamic_section when creating the dynamic
2463 local_plt[r_symndx].sec = sec;
2467 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2471 bfd_boolean warned ATTRIBUTE_UNUSED;
2472 bfd_boolean ignored ATTRIBUTE_UNUSED;
2474 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2475 r_symndx, symtab_hdr, sym_hashes,
2477 unresolved_reloc, warned, ignored);
2480 if (sec != NULL && discarded_section (sec))
2481 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2482 rel, 1, relend, howto, 0, contents);
2484 if (bfd_link_relocatable (info))
2489 case R_390_GOTPLT12:
2490 case R_390_GOTPLT16:
2491 case R_390_GOTPLT20:
2492 case R_390_GOTPLT32:
2493 case R_390_GOTPLTENT:
2494 /* There are three cases for a GOTPLT relocation. 1) The
2495 relocation is against the jump slot entry of a plt that
2496 will get emitted to the output file. 2) The relocation
2497 is against the jump slot of a plt entry that has been
2498 removed. elf_s390_adjust_gotplt has created a GOT entry
2499 as replacement. 3) The relocation is against a local symbol.
2500 Cases 2) and 3) are the same as the GOT relocation code
2501 so we just have to test for case 1 and fall through for
2503 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2507 if (s390_is_ifunc_symbol_p (h))
2509 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2510 relocation = (plt_index * GOT_ENTRY_SIZE +
2511 htab->elf.igotplt->output_offset);
2512 if (r_type == R_390_GOTPLTENT)
2513 relocation += htab->elf.igotplt->output_section->vma;
2518 Current offset - size first entry / entry size. */
2519 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2522 /* Offset in GOT is PLT index plus GOT headers(3)
2523 times 4, addr & GOT addr. */
2524 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2525 if (r_type == R_390_GOTPLTENT)
2526 relocation += htab->elf.sgot->output_section->vma;
2528 unresolved_reloc = FALSE;
2538 /* Relocation is to the entry for this symbol in the global
2540 if (base_got == NULL)
2547 off = h->got.offset;
2548 dyn = htab->elf.dynamic_sections_created;
2550 if (s390_is_ifunc_symbol_p (h))
2552 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2553 if (off == (bfd_vma)-1)
2555 /* No explicit GOT usage so redirect to the
2557 base_got = htab->elf.igotplt;
2558 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2562 /* Explicit GOT slots must contain the address
2563 of the PLT slot. This will be handled in
2564 finish_dynamic_symbol. */
2567 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2568 bfd_link_pic (info),
2570 || (bfd_link_pic (info)
2571 && SYMBOL_REFERENCES_LOCAL (info, h))
2572 || (ELF_ST_VISIBILITY (h->other)
2573 && h->root.type == bfd_link_hash_undefweak))
2576 /* This is actually a static link, or it is a
2577 -Bsymbolic link and the symbol is defined
2578 locally, or the symbol was forced to be local
2579 because of a version file. We must initialize
2580 this entry in the global offset table. Since the
2581 offset must always be a multiple of 2, we use the
2582 least significant bit to record whether we have
2583 initialized it already.
2585 When doing a dynamic link, we create a .rel.got
2586 relocation entry to initialize the value. This
2587 is done in the finish_dynamic_symbol routine. */
2592 bfd_put_32 (output_bfd, relocation,
2593 base_got->contents + off);
2598 && bfd_link_pic (info)
2599 && SYMBOL_REFERENCES_LOCAL (info, h))
2600 /* lrl rx,sym@GOTENT -> larl rx, sym */
2601 && ((r_type == R_390_GOTENT
2602 && (bfd_get_16 (input_bfd,
2603 contents + rel->r_offset - 2)
2604 & 0xff0f) == 0xc40d)
2605 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2606 || (r_type == R_390_GOT20
2607 && (bfd_get_32 (input_bfd,
2608 contents + rel->r_offset - 2)
2609 & 0xff00f000) == 0xe300c000
2610 && bfd_get_8 (input_bfd,
2611 contents + rel->r_offset + 3) == 0x58)))
2613 unsigned short new_insn =
2614 (0xc000 | (bfd_get_8 (input_bfd,
2615 contents + rel->r_offset - 1) & 0xf0));
2616 bfd_put_16 (output_bfd, new_insn,
2617 contents + rel->r_offset - 2);
2618 r_type = R_390_PC32DBL;
2620 howto = elf_howto_table + r_type;
2621 relocation = h->root.u.def.value
2622 + h->root.u.def.section->output_section->vma
2623 + h->root.u.def.section->output_offset;
2628 unresolved_reloc = FALSE;
2632 if (local_got_offsets == NULL)
2635 off = local_got_offsets[r_symndx];
2637 /* The offset must always be a multiple of 4. We use
2638 the least significant bit to record whether we have
2639 already generated the necessary reloc. */
2644 bfd_put_32 (output_bfd, relocation,
2645 htab->elf.sgot->contents + off);
2647 if (bfd_link_pic (info))
2650 Elf_Internal_Rela outrel;
2653 srelgot = htab->elf.srelgot;
2654 if (srelgot == NULL)
2657 outrel.r_offset = (htab->elf.sgot->output_section->vma
2658 + htab->elf.sgot->output_offset
2660 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2661 outrel.r_addend = relocation;
2662 loc = srelgot->contents;
2663 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2664 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2667 local_got_offsets[r_symndx] |= 1;
2671 if (off >= (bfd_vma) -2)
2674 relocation = base_got->output_offset + off;
2676 /* For @GOTENT the relocation is against the offset between
2677 the instruction and the symbols entry in the GOT and not
2678 between the start of the GOT and the symbols entry. We
2679 add the vma of the GOT to get the correct value. */
2680 if ( r_type == R_390_GOTENT
2681 || r_type == R_390_GOTPLTENT)
2682 relocation += base_got->output_section->vma;
2686 case R_390_GOTOFF16:
2687 case R_390_GOTOFF32:
2688 /* Relocation is relative to the start of the global offset
2692 && s390_is_ifunc_symbol_p (h)
2694 && !bfd_link_executable (info))
2696 relocation = (htab->elf.iplt->output_section->vma
2697 + htab->elf.iplt->output_offset
2699 - htab->elf.sgot->output_section->vma);
2703 /* Note that sgot->output_offset is not involved in this
2704 calculation. We always want the start of .got. If we
2705 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2706 permitted by the ABI, we might have to change this
2708 relocation -= htab->elf.sgot->output_section->vma;
2712 case R_390_GOTPCDBL:
2713 /* Use global offset table as symbol value. */
2714 relocation = htab->elf.sgot->output_section->vma;
2715 unresolved_reloc = FALSE;
2718 case R_390_PLT12DBL:
2719 case R_390_PLT16DBL:
2720 case R_390_PLT24DBL:
2721 case R_390_PLT32DBL:
2723 /* Relocation is to the entry for this symbol in the
2724 procedure linkage table. */
2726 /* Resolve a PLT32 reloc against a local symbol directly,
2727 without using the procedure linkage table. */
2731 if (h->plt.offset == (bfd_vma) -1
2732 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2734 /* We didn't make a PLT entry for this symbol. This
2735 happens when statically linking PIC code, or when
2736 using -Bsymbolic. */
2740 if (s390_is_ifunc_symbol_p (h))
2741 relocation = (htab->elf.iplt->output_section->vma
2742 + htab->elf.iplt->output_offset
2745 relocation = (htab->elf.splt->output_section->vma
2746 + htab->elf.splt->output_offset
2748 unresolved_reloc = FALSE;
2751 case R_390_PLTOFF16:
2752 case R_390_PLTOFF32:
2753 /* Relocation is to the entry for this symbol in the
2754 procedure linkage table relative to the start of the GOT. */
2756 /* For local symbols or if we didn't make a PLT entry for
2757 this symbol resolve the symbol directly. */
2759 || h->plt.offset == (bfd_vma) -1
2760 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2762 relocation -= htab->elf.sgot->output_section->vma;
2766 if (s390_is_ifunc_symbol_p (h))
2767 relocation = (htab->elf.iplt->output_section->vma
2768 + htab->elf.iplt->output_offset
2770 - htab->elf.sgot->output_section->vma);
2772 relocation = (htab->elf.splt->output_section->vma
2773 + htab->elf.splt->output_offset
2775 - htab->elf.sgot->output_section->vma);
2776 unresolved_reloc = FALSE;
2786 && s390_is_ifunc_symbol_p (h)
2788 && !bfd_link_executable (info))
2790 /* This will not work our if the function does not
2791 happen to set up the GOT pointer for some other
2792 reason. 31 bit PLT entries require r12 to hold the
2794 FIXME: Implement an errorcheck.
2795 NOTE: It will work when brasl is not available
2796 (e.g. with -m31 -march=g5) since a local function
2797 call then does use GOTOFF which implies r12 being set
2799 relocation = (htab->elf.iplt->output_section->vma
2800 + htab->elf.iplt->output_offset
2809 && s390_is_ifunc_symbol_p (h)
2812 if (!bfd_link_pic (info) || !h->non_got_ref)
2814 /* For a non-shared object STT_GNU_IFUNC symbol must
2816 relocation = (htab->elf.iplt->output_section->vma
2817 + htab->elf.iplt->output_offset
2823 /* For shared objects a runtime relocation is needed. */
2825 Elf_Internal_Rela outrel;
2828 /* Need a dynamic relocation to get the real function
2830 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2834 if (outrel.r_offset == (bfd_vma) -1
2835 || outrel.r_offset == (bfd_vma) -2)
2838 outrel.r_offset += (input_section->output_section->vma
2839 + input_section->output_offset);
2841 if (h->dynindx == -1
2843 || bfd_link_executable (info))
2845 /* This symbol is resolved locally. */
2846 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2847 outrel.r_addend = (h->root.u.def.value
2848 + h->root.u.def.section->output_section->vma
2849 + h->root.u.def.section->output_offset);
2853 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2854 outrel.r_addend = 0;
2857 sreloc = htab->elf.irelifunc;
2858 elf_append_rela (output_bfd, sreloc, &outrel);
2860 /* If this reloc is against an external symbol, we
2861 do not want to fiddle with the addend. Otherwise,
2862 we need to include the symbol value so that it
2863 becomes an addend for the dynamic reloc. For an
2864 internal symbol, we have updated addend. */
2869 if ((input_section->flags & SEC_ALLOC) == 0)
2872 if ((bfd_link_pic (info)
2874 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2875 || h->root.type != bfd_link_hash_undefweak)
2876 && ((r_type != R_390_PC16
2877 && r_type != R_390_PC12DBL
2878 && r_type != R_390_PC16DBL
2879 && r_type != R_390_PC24DBL
2880 && r_type != R_390_PC32DBL
2881 && r_type != R_390_PC32)
2882 || !SYMBOL_CALLS_LOCAL (info, h)))
2883 || (ELIMINATE_COPY_RELOCS
2884 && !bfd_link_pic (info)
2890 || h->root.type == bfd_link_hash_undefweak
2891 || h->root.type == bfd_link_hash_undefined)))
2893 Elf_Internal_Rela outrel;
2894 bfd_boolean skip, relocate;
2898 /* When generating a shared object, these relocations
2899 are copied into the output file to be resolved at run
2906 _bfd_elf_section_offset (output_bfd, info, input_section,
2908 if (outrel.r_offset == (bfd_vma) -1)
2910 else if (outrel.r_offset == (bfd_vma) -2)
2911 skip = TRUE, relocate = TRUE;
2912 outrel.r_offset += (input_section->output_section->vma
2913 + input_section->output_offset);
2916 memset (&outrel, 0, sizeof outrel);
2919 && (r_type == R_390_PC16
2920 || r_type == R_390_PC12DBL
2921 || r_type == R_390_PC16DBL
2922 || r_type == R_390_PC24DBL
2923 || r_type == R_390_PC32DBL
2924 || r_type == R_390_PC32
2925 || !bfd_link_pic (info)
2926 || !SYMBOLIC_BIND (info, h)
2927 || !h->def_regular))
2929 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2930 outrel.r_addend = rel->r_addend;
2934 /* This symbol is local, or marked to become local. */
2935 outrel.r_addend = relocation + rel->r_addend;
2936 if (r_type == R_390_32)
2939 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2945 if (bfd_is_abs_section (sec))
2947 else if (sec == NULL || sec->owner == NULL)
2949 bfd_set_error(bfd_error_bad_value);
2956 osec = sec->output_section;
2957 sindx = elf_section_data (osec)->dynindx;
2960 osec = htab->elf.text_index_section;
2961 sindx = elf_section_data (osec)->dynindx;
2963 BFD_ASSERT (sindx != 0);
2965 /* We are turning this relocation into one
2966 against a section symbol, so subtract out
2967 the output section's address but not the
2968 offset of the input section in the output
2970 outrel.r_addend -= osec->vma;
2972 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2976 sreloc = elf_section_data (input_section)->sreloc;
2980 loc = sreloc->contents;
2981 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2982 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2984 /* If this reloc is against an external symbol, we do
2985 not want to fiddle with the addend. Otherwise, we
2986 need to include the symbol value so that it becomes
2987 an addend for the dynamic reloc. */
2993 /* Relocations for tls literal pool entries. */
2994 case R_390_TLS_IE32:
2995 if (bfd_link_pic (info))
2997 Elf_Internal_Rela outrel;
3001 outrel.r_offset = rel->r_offset
3002 + input_section->output_section->vma
3003 + input_section->output_offset;
3004 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3005 sreloc = elf_section_data (input_section)->sreloc;
3008 loc = sreloc->contents;
3009 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3010 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3014 case R_390_TLS_GD32:
3015 case R_390_TLS_GOTIE32:
3016 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
3017 tls_type = GOT_UNKNOWN;
3018 if (h == NULL && local_got_offsets)
3019 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3022 tls_type = elf_s390_hash_entry(h)->tls_type;
3023 if (!bfd_link_pic (info)
3025 && tls_type >= GOT_TLS_IE)
3026 r_type = R_390_TLS_LE32;
3028 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
3029 r_type = R_390_TLS_IE32;
3031 if (r_type == R_390_TLS_LE32)
3033 /* This relocation gets optimized away by the local exec
3034 access optimization. */
3035 BFD_ASSERT (! unresolved_reloc);
3036 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3037 contents + rel->r_offset);
3041 if (htab->elf.sgot == NULL)
3045 off = h->got.offset;
3048 if (local_got_offsets == NULL)
3051 off = local_got_offsets[r_symndx];
3060 Elf_Internal_Rela outrel;
3064 if (htab->elf.srelgot == NULL)
3067 outrel.r_offset = (htab->elf.sgot->output_section->vma
3068 + htab->elf.sgot->output_offset + off);
3070 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3071 if (r_type == R_390_TLS_GD32)
3072 dr_type = R_390_TLS_DTPMOD;
3074 dr_type = R_390_TLS_TPOFF;
3075 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3076 outrel.r_addend = relocation - dtpoff_base (info);
3078 outrel.r_addend = 0;
3079 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3080 loc = htab->elf.srelgot->contents;
3081 loc += htab->elf.srelgot->reloc_count++
3082 * sizeof (Elf32_External_Rela);
3083 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3085 if (r_type == R_390_TLS_GD32)
3089 BFD_ASSERT (! unresolved_reloc);
3090 bfd_put_32 (output_bfd,
3091 relocation - dtpoff_base (info),
3092 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3096 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3097 outrel.r_offset += GOT_ENTRY_SIZE;
3098 outrel.r_addend = 0;
3099 htab->elf.srelgot->reloc_count++;
3100 loc += sizeof (Elf32_External_Rela);
3101 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3108 local_got_offsets[r_symndx] |= 1;
3111 if (off >= (bfd_vma) -2)
3113 if (r_type == ELF32_R_TYPE (rel->r_info))
3115 relocation = htab->elf.sgot->output_offset + off;
3116 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3117 relocation += htab->elf.sgot->output_section->vma;
3118 unresolved_reloc = FALSE;
3122 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3123 contents + rel->r_offset);
3128 case R_390_TLS_GOTIE12:
3129 case R_390_TLS_GOTIE20:
3130 case R_390_TLS_IEENT:
3133 if (local_got_offsets == NULL)
3135 off = local_got_offsets[r_symndx];
3136 if (bfd_link_pic (info))
3137 goto emit_tls_relocs;
3141 off = h->got.offset;
3142 tls_type = elf_s390_hash_entry(h)->tls_type;
3143 if (bfd_link_pic (info)
3145 || tls_type < GOT_TLS_IE)
3146 goto emit_tls_relocs;
3149 if (htab->elf.sgot == NULL)
3152 BFD_ASSERT (! unresolved_reloc);
3153 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3154 htab->elf.sgot->contents + off);
3155 relocation = htab->elf.sgot->output_offset + off;
3156 if (r_type == R_390_TLS_IEENT)
3157 relocation += htab->elf.sgot->output_section->vma;
3158 unresolved_reloc = FALSE;
3161 case R_390_TLS_LDM32:
3162 if (! bfd_link_pic (info))
3163 /* The literal pool entry this relocation refers to gets ignored
3164 by the optimized code of the local exec model. Do nothing
3165 and the value will turn out zero. */
3168 if (htab->elf.sgot == NULL)
3171 off = htab->tls_ldm_got.offset;
3176 Elf_Internal_Rela outrel;
3179 if (htab->elf.srelgot == NULL)
3182 outrel.r_offset = (htab->elf.sgot->output_section->vma
3183 + htab->elf.sgot->output_offset + off);
3185 bfd_put_32 (output_bfd, 0,
3186 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3187 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3188 outrel.r_addend = 0;
3189 loc = htab->elf.srelgot->contents;
3190 loc += htab->elf.srelgot->reloc_count++
3191 * sizeof (Elf32_External_Rela);
3192 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3193 htab->tls_ldm_got.offset |= 1;
3195 relocation = htab->elf.sgot->output_offset + off;
3196 unresolved_reloc = FALSE;
3199 case R_390_TLS_LE32:
3200 if (bfd_link_dll (info))
3202 /* Linking a shared library with non-fpic code requires
3203 a R_390_TLS_TPOFF relocation. */
3204 Elf_Internal_Rela outrel;
3209 outrel.r_offset = rel->r_offset
3210 + input_section->output_section->vma
3211 + input_section->output_offset;
3212 if (h != NULL && h->dynindx != -1)
3216 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3218 outrel.r_addend = relocation - dtpoff_base (info);
3220 outrel.r_addend = 0;
3221 sreloc = elf_section_data (input_section)->sreloc;
3224 loc = sreloc->contents;
3225 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3226 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3230 BFD_ASSERT (! unresolved_reloc);
3231 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3232 contents + rel->r_offset);
3236 case R_390_TLS_LDO32:
3237 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3238 relocation -= dtpoff_base (info);
3240 /* When converting LDO to LE, we must negate. */
3241 relocation = -tpoff (info, relocation);
3244 /* Relocations for tls instructions. */
3245 case R_390_TLS_LOAD:
3246 case R_390_TLS_GDCALL:
3247 case R_390_TLS_LDCALL:
3248 tls_type = GOT_UNKNOWN;
3249 if (h == NULL && local_got_offsets)
3250 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3252 tls_type = elf_s390_hash_entry(h)->tls_type;
3254 if (tls_type == GOT_TLS_GD)
3257 if (r_type == R_390_TLS_LOAD)
3259 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3261 /* IE->LE transition. Four valid cases:
3262 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3263 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3264 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3265 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3266 unsigned int insn, ry;
3268 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3270 if ((insn & 0xff00f000) == 0x58000000)
3271 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3272 ry = (insn & 0x000f0000);
3273 else if ((insn & 0xff0f0000) == 0x58000000)
3274 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3275 ry = (insn & 0x0000f000) << 4;
3276 else if ((insn & 0xff00f000) == 0x5800c000)
3277 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3278 ry = (insn & 0x000f0000);
3279 else if ((insn & 0xff0f0000) == 0x580c0000)
3280 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3281 ry = (insn & 0x0000f000) << 4;
3283 invalid_tls_insn (input_bfd, input_section, rel);
3284 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3285 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3288 else if (r_type == R_390_TLS_GDCALL)
3292 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3293 if ((insn & 0xff000fff) != 0x4d000000 &&
3294 (insn & 0xffff0000) != 0xc0e50000 &&
3295 (insn & 0xff000000) != 0x0d000000)
3296 invalid_tls_insn (input_bfd, input_section, rel);
3297 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3299 if ((insn & 0xff000000) == 0x0d000000)
3301 /* GD->LE transition.
3302 basr rx, ry -> nopr r7 */
3303 insn = 0x07070000 | (insn & 0xffff);
3305 else if ((insn & 0xff000000) == 0x4d000000)
3307 /* GD->LE transition.
3308 bas %r14,0(%rx,%r13) -> bc 0,0 */
3313 /* GD->LE transition.
3314 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3316 bfd_put_16 (output_bfd, 0x0000,
3317 contents + rel->r_offset + 4);
3322 /* If basr is used in the pic case to invoke
3323 _tls_get_offset, something went wrong before. */
3324 if ((insn & 0xff000000) == 0x0d000000)
3325 invalid_tls_insn (input_bfd, input_section, rel);
3327 if ((insn & 0xff000000) == 0x4d000000)
3329 /* GD->IE transition.
3330 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3335 /* GD->IE transition.
3336 brasl %r14,__tls_get_addr@plt ->
3337 l %r2,0(%r2,%r12) ; bcr 0,0 */
3339 bfd_put_16 (output_bfd, 0x0700,
3340 contents + rel->r_offset + 4);
3343 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3345 else if (r_type == R_390_TLS_LDCALL)
3347 if (!bfd_link_pic (info))
3351 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3352 if ((insn & 0xff000fff) != 0x4d000000 &&
3353 (insn & 0xffff0000) != 0xc0e50000 &&
3354 (insn & 0xff000000) != 0x0d000000)
3355 invalid_tls_insn (input_bfd, input_section, rel);
3357 if ((insn & 0xff000000) == 0x0d000000)
3359 /* LD->LE transition.
3360 basr rx, ry -> nopr r7 */
3361 insn = 0x07070000 | (insn & 0xffff);
3363 else if ((insn & 0xff000000) == 0x4d000000)
3365 /* LD->LE transition.
3366 bas %r14,0(%rx,%r13) -> bc 0,0 */
3371 /* LD->LE transition.
3372 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3374 bfd_put_16 (output_bfd, 0x0000,
3375 contents + rel->r_offset + 4);
3377 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3386 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3387 because such sections are not SEC_ALLOC and thus ld.so will
3388 not process them. */
3389 if (unresolved_reloc
3390 && !((input_section->flags & SEC_DEBUGGING) != 0
3392 && _bfd_elf_section_offset (output_bfd, info, input_section,
3393 rel->r_offset) != (bfd_vma) -1)
3394 (*_bfd_error_handler)
3395 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3398 (long) rel->r_offset,
3400 h->root.root.string);
3404 /* When applying a 24 bit reloc we need to start one byte
3405 earlier. Otherwise the 32 bit get/put bfd operations might
3406 access a byte after the actual section. */
3407 if (r_type == R_390_PC24DBL
3408 || r_type == R_390_PLT24DBL)
3411 if (r_type == R_390_20
3412 || r_type == R_390_GOT20
3413 || r_type == R_390_GOTPLT20
3414 || r_type == R_390_TLS_GOTIE20)
3416 relocation += rel->r_addend;
3417 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3418 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3419 contents, rel->r_offset,
3423 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3424 contents, rel->r_offset,
3425 relocation, rel->r_addend);
3427 if (r != bfd_reloc_ok)
3432 name = h->root.root.string;
3435 name = bfd_elf_string_from_elf_section (input_bfd,
3436 symtab_hdr->sh_link,
3441 name = bfd_section_name (input_bfd, sec);
3444 if (r == bfd_reloc_overflow)
3447 if (! ((*info->callbacks->reloc_overflow)
3448 (info, (h ? &h->root : NULL), name, howto->name,
3449 (bfd_vma) 0, input_bfd, input_section,
3455 (*_bfd_error_handler)
3456 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3457 input_bfd, input_section,
3458 (long) rel->r_offset, name, (int) r);
3467 /* Generate the PLT slots together with the dynamic relocations needed
3468 for IFUNC symbols. */
3471 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3472 struct bfd_link_info *info,
3473 struct elf_link_hash_entry *h,
3474 struct elf_s390_link_hash_table *htab,
3475 bfd_vma iplt_offset,
3476 bfd_vma resolver_address)
3480 bfd_vma igotiplt_offset;
3481 Elf_Internal_Rela rela;
3483 asection *plt, *gotplt, *relplt;
3484 bfd_vma relative_offset;
3486 if (htab->elf.iplt == NULL
3487 || htab->elf.igotplt == NULL
3488 || htab->elf.irelplt == NULL)
3491 gotplt = htab->elf.igotplt;
3492 relplt = htab->elf.irelplt;
3494 /* Index of the PLT slot within iplt section. */
3495 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3496 plt = htab->elf.iplt;
3497 /* Offset into the igot.plt section. */
3498 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3499 /* Offset into the got section. */
3500 got_offset = igotiplt_offset + gotplt->output_offset;
3502 /* S390 uses halfwords for relative branch calc! */
3503 relative_offset = - (plt->output_offset +
3504 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3505 /* If offset is > 32768, branch to a previous branch
3506 390 can only handle +-64 K jumps. */
3507 if ( -32768 > (int) relative_offset )
3509 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3511 /* Fill in the entry in the procedure linkage table. */
3512 if (!bfd_link_pic (info))
3514 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3517 /* Adjust jump to the first plt entry. */
3518 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3519 plt->contents + iplt_offset + 20);
3521 /* Push the GOT offset field. */
3522 bfd_put_32 (output_bfd,
3523 (gotplt->output_section->vma
3525 plt->contents + iplt_offset + 24);
3527 else if (got_offset < 4096)
3529 /* The GOT offset is small enough to be used directly as
3531 memcpy (plt->contents + iplt_offset,
3532 elf_s390_plt_pic12_entry,
3535 /* Put in the GOT offset as displacement value. The 0xc000
3536 value comes from the first word of the plt entry. Look
3537 at the elf_s390_plt_pic16_entry content. */
3538 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3539 plt->contents + iplt_offset + 2);
3541 /* Adjust the jump to the first plt entry. */
3542 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3543 plt->contents + iplt_offset + 20);
3545 else if (got_offset < 32768)
3547 /* The GOT offset is too big for a displacement but small
3548 enough to be a signed 16 bit immediate value as it can be
3549 used in an lhi instruction. */
3550 memcpy (plt->contents + iplt_offset,
3551 elf_s390_plt_pic16_entry,
3554 /* Put in the GOT offset for the lhi instruction. */
3555 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3556 plt->contents + iplt_offset + 2);
3558 /* Adjust the jump to the first plt entry. */
3559 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3560 plt->contents + iplt_offset + 20);
3564 memcpy (plt->contents + iplt_offset,
3565 elf_s390_plt_pic_entry,
3568 /* Adjust the jump to the first plt entry. */
3569 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3570 plt->contents + iplt_offset + 20);
3572 /* Push the GOT offset field. */
3573 bfd_put_32 (output_bfd, got_offset,
3574 plt->contents + iplt_offset + 24);
3576 /* Insert offset into reloc. table here. */
3577 bfd_put_32 (output_bfd, relplt->output_offset +
3578 iplt_index * RELA_ENTRY_SIZE,
3579 plt->contents + iplt_offset + 28);
3581 /* Fill in the entry in the global offset table.
3582 Points to instruction after GOT offset. */
3583 bfd_put_32 (output_bfd,
3584 (plt->output_section->vma
3585 + plt->output_offset
3588 gotplt->contents + igotiplt_offset);
3590 /* Fill in the entry in the .rela.plt section. */
3591 rela.r_offset = gotplt->output_section->vma + got_offset;
3595 || ((bfd_link_executable (info)
3596 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3599 /* The symbol can be locally resolved. */
3600 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3601 rela.r_addend = resolver_address;
3605 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3609 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3610 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3613 /* Finish up dynamic symbol handling. We set the contents of various
3614 dynamic sections here. */
3617 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3618 struct bfd_link_info *info,
3619 struct elf_link_hash_entry *h,
3620 Elf_Internal_Sym *sym)
3622 struct elf_s390_link_hash_table *htab;
3623 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3625 htab = elf_s390_hash_table (info);
3627 if (h->plt.offset != (bfd_vma) -1)
3631 Elf_Internal_Rela rela;
3633 bfd_vma relative_offset;
3635 /* This symbol has an entry in the procedure linkage table. Set
3637 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3639 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3640 htab, h->plt.offset,
3641 eh->ifunc_resolver_address +
3642 eh->ifunc_resolver_section->output_offset +
3643 eh->ifunc_resolver_section->output_section->vma);
3644 /* Do not return yet. Handling of explicit GOT slots of
3645 IFUNC symbols is below. */
3649 if (h->dynindx == -1
3650 || htab->elf.splt == NULL
3651 || htab->elf.sgotplt == NULL
3652 || htab->elf.srelplt == NULL)
3656 Current offset - size first entry / entry size. */
3657 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3659 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3661 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3663 /* S390 uses halfwords for relative branch calc! */
3664 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3665 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3666 /* If offset is > 32768, branch to a previous branch
3667 390 can only handle +-64 K jumps. */
3668 if ( -32768 > (int) relative_offset )
3670 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3672 /* Fill in the entry in the procedure linkage table. */
3673 if (!bfd_link_pic (info))
3675 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3678 /* Adjust jump to the first plt entry. */
3679 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3680 htab->elf.splt->contents + h->plt.offset + 20);
3682 /* Push the GOT offset field. */
3683 bfd_put_32 (output_bfd,
3684 (htab->elf.sgotplt->output_section->vma
3685 + htab->elf.sgotplt->output_offset
3687 htab->elf.splt->contents + h->plt.offset + 24);
3689 else if (got_offset < 4096)
3691 /* The GOT offset is small enough to be used directly as
3693 memcpy (htab->elf.splt->contents + h->plt.offset,
3694 elf_s390_plt_pic12_entry,
3697 /* Put in the GOT offset as displacement value. The 0xc000
3698 value comes from the first word of the plt entry. Look
3699 at the elf_s390_plt_pic16_entry content. */
3700 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3701 htab->elf.splt->contents + h->plt.offset + 2);
3703 /* Adjust the jump to the first plt entry. */
3704 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3705 htab->elf.splt->contents + h->plt.offset + 20);
3707 else if (got_offset < 32768)
3709 /* The GOT offset is too big for a displacement but small
3710 enough to be a signed 16 bit immediate value as it can be
3711 used in an lhi instruction. */
3712 memcpy (htab->elf.splt->contents + h->plt.offset,
3713 elf_s390_plt_pic16_entry,
3716 /* Put in the GOT offset for the lhi instruction. */
3717 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3718 htab->elf.splt->contents + h->plt.offset + 2);
3720 /* Adjust the jump to the first plt entry. */
3721 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3722 htab->elf.splt->contents + h->plt.offset + 20);
3726 memcpy (htab->elf.splt->contents + h->plt.offset,
3727 elf_s390_plt_pic_entry,
3730 /* Adjust the jump to the first plt entry. */
3731 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3732 htab->elf.splt->contents + h->plt.offset + 20);
3734 /* Push the GOT offset field. */
3735 bfd_put_32 (output_bfd, got_offset,
3736 htab->elf.splt->contents + h->plt.offset + 24);
3738 /* Insert offset into reloc. table here. */
3739 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3740 htab->elf.splt->contents + h->plt.offset + 28);
3742 /* Fill in the entry in the global offset table.
3743 Points to instruction after GOT offset. */
3744 bfd_put_32 (output_bfd,
3745 (htab->elf.splt->output_section->vma
3746 + htab->elf.splt->output_offset
3749 htab->elf.sgotplt->contents + got_offset);
3751 /* Fill in the entry in the .rela.plt section. */
3752 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3753 + htab->elf.sgotplt->output_offset
3755 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3757 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3758 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3760 if (!h->def_regular)
3762 /* Mark the symbol as undefined, rather than as defined in
3763 the .plt section. Leave the value alone. This is a clue
3764 for the dynamic linker, to make function pointer
3765 comparisons work between an application and shared
3767 sym->st_shndx = SHN_UNDEF;
3772 if (h->got.offset != (bfd_vma) -1
3773 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3774 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3775 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3777 Elf_Internal_Rela rela;
3780 /* This symbol has an entry in the global offset table. Set it
3783 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3786 rela.r_offset = (htab->elf.sgot->output_section->vma
3787 + htab->elf.sgot->output_offset
3788 + (h->got.offset &~ (bfd_vma) 1));
3790 /* If this is a static link, or it is a -Bsymbolic link and the
3791 symbol is defined locally or was forced to be local because
3792 of a version file, we just want to emit a RELATIVE reloc.
3793 The entry in the global offset table will already have been
3794 initialized in the relocate_section function. */
3795 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3797 if (bfd_link_pic (info))
3799 /* An explicit GOT slot usage needs GLOB_DAT. If the
3800 symbol references local the implicit got.iplt slot
3801 will be used and the IRELATIVE reloc has been created
3807 /* For non-shared objects explicit GOT slots must be
3808 filled with the PLT slot address for pointer
3809 equality reasons. */
3810 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3811 + htab->elf.iplt->output_offset
3813 htab->elf.sgot->contents + h->got.offset);
3817 else if (bfd_link_pic (info)
3818 && SYMBOL_REFERENCES_LOCAL (info, h))
3820 /* If this is a static link, or it is a -Bsymbolic link and
3821 the symbol is defined locally or was forced to be local
3822 because of a version file, we just want to emit a
3823 RELATIVE reloc. The entry in the global offset table
3824 will already have been initialized in the
3825 relocate_section function. */
3826 if (!h->def_regular)
3828 BFD_ASSERT((h->got.offset & 1) != 0);
3829 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3830 rela.r_addend = (h->root.u.def.value
3831 + h->root.u.def.section->output_section->vma
3832 + h->root.u.def.section->output_offset);
3836 BFD_ASSERT((h->got.offset & 1) == 0);
3838 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3839 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3843 loc = htab->elf.srelgot->contents;
3844 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3845 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3850 Elf_Internal_Rela rela;
3853 /* This symbols needs a copy reloc. Set it up. */
3855 if (h->dynindx == -1
3856 || (h->root.type != bfd_link_hash_defined
3857 && h->root.type != bfd_link_hash_defweak)
3858 || htab->srelbss == NULL)
3861 rela.r_offset = (h->root.u.def.value
3862 + h->root.u.def.section->output_section->vma
3863 + h->root.u.def.section->output_offset);
3864 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3866 loc = htab->srelbss->contents;
3867 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3868 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3871 /* Mark some specially defined symbols as absolute. */
3872 if (h == htab->elf.hdynamic
3873 || h == htab->elf.hgot
3874 || h == htab->elf.hplt)
3875 sym->st_shndx = SHN_ABS;
3880 /* Used to decide how to sort relocs in an optimal manner for the
3881 dynamic linker, before writing them out. */
3883 static enum elf_reloc_type_class
3884 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3885 const asection *rel_sec ATTRIBUTE_UNUSED,
3886 const Elf_Internal_Rela *rela)
3888 bfd *abfd = info->output_bfd;
3889 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3890 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3891 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3892 Elf_Internal_Sym sym;
3894 if (htab->elf.dynsym == NULL
3895 || !bed->s->swap_symbol_in (abfd,
3896 (htab->elf.dynsym->contents
3897 + r_symndx * bed->s->sizeof_sym),
3901 /* Check relocation against STT_GNU_IFUNC symbol. */
3902 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3903 return reloc_class_ifunc;
3905 switch ((int) ELF32_R_TYPE (rela->r_info))
3907 case R_390_RELATIVE:
3908 return reloc_class_relative;
3909 case R_390_JMP_SLOT:
3910 return reloc_class_plt;
3912 return reloc_class_copy;
3914 return reloc_class_normal;
3918 /* Finish up the dynamic sections. */
3921 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3922 struct bfd_link_info *info)
3924 struct elf_s390_link_hash_table *htab;
3930 htab = elf_s390_hash_table (info);
3931 dynobj = htab->elf.dynobj;
3932 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3934 if (htab->elf.dynamic_sections_created)
3936 Elf32_External_Dyn *dyncon, *dynconend;
3938 if (sdyn == NULL || htab->elf.sgot == NULL)
3941 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3942 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3943 for (; dyncon < dynconend; dyncon++)
3945 Elf_Internal_Dyn dyn;
3948 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3956 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3960 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3964 s = htab->elf.srelplt->output_section;
3965 dyn.d_un.d_val = s->size;
3969 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3972 /* Fill in the special first entry in the procedure linkage table. */
3973 if (htab->elf.splt && htab->elf.splt->size > 0)
3975 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3976 if (bfd_link_pic (info))
3978 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3979 PLT_FIRST_ENTRY_SIZE);
3983 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3984 PLT_FIRST_ENTRY_SIZE);
3985 bfd_put_32 (output_bfd,
3986 htab->elf.sgotplt->output_section->vma
3987 + htab->elf.sgotplt->output_offset,
3988 htab->elf.splt->contents + 24);
3990 elf_section_data (htab->elf.splt->output_section)
3991 ->this_hdr.sh_entsize = 4;
3996 if (htab->elf.sgotplt)
3998 /* Fill in the first three entries in the global offset table. */
3999 if (htab->elf.sgotplt->size > 0)
4001 bfd_put_32 (output_bfd,
4002 (sdyn == NULL ? (bfd_vma) 0
4003 : sdyn->output_section->vma + sdyn->output_offset),
4004 htab->elf.sgotplt->contents);
4005 /* One entry for shared object struct ptr. */
4006 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
4007 /* One entry for _dl_runtime_resolve. */
4008 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
4011 elf_section_data (htab->elf.sgotplt->output_section)
4012 ->this_hdr.sh_entsize = 4;
4014 /* Finish dynamic symbol for local IFUNC symbols. */
4015 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4017 struct plt_entry *local_plt;
4018 Elf_Internal_Sym *isym;
4019 Elf_Internal_Shdr *symtab_hdr;
4021 symtab_hdr = &elf_symtab_hdr (ibfd);
4023 local_plt = elf_s390_local_plt (ibfd);
4024 if (local_plt != NULL)
4025 for (i = 0; i < symtab_hdr->sh_info; i++)
4027 if (local_plt[i].plt.offset != (bfd_vma) -1)
4029 asection *sec = local_plt[i].sec;
4030 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
4034 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4035 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
4036 local_plt[i].plt.offset,
4038 + sec->output_section->vma
4039 + sec->output_offset);
4048 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
4053 switch (note->descsz)
4058 case 224: /* S/390 Linux. */
4060 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4063 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
4071 /* Make a ".reg/999" section. */
4072 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4073 size, note->descpos + offset);
4076 /* Return address for Ith PLT stub in section PLT, for relocation REL
4077 or (bfd_vma) -1 if it should not be included. */
4080 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4081 const arelent *rel ATTRIBUTE_UNUSED)
4083 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4086 /* Merge backend specific data from an object file to the output
4087 object file when linking. */
4090 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4092 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4095 if (!elf_s390_merge_obj_attributes (ibfd, obfd))
4098 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4103 #define TARGET_BIG_SYM s390_elf32_vec
4104 #define TARGET_BIG_NAME "elf32-s390"
4105 #define ELF_ARCH bfd_arch_s390
4106 #define ELF_TARGET_ID S390_ELF_DATA
4107 #define ELF_MACHINE_CODE EM_S390
4108 #define ELF_MACHINE_ALT1 EM_S390_OLD
4109 #define ELF_MAXPAGESIZE 0x1000
4111 #define elf_backend_can_gc_sections 1
4112 #define elf_backend_can_refcount 1
4113 #define elf_backend_want_got_plt 1
4114 #define elf_backend_plt_readonly 1
4115 #define elf_backend_want_plt_sym 0
4116 #define elf_backend_got_header_size 12
4117 #define elf_backend_rela_normal 1
4119 #define elf_info_to_howto elf_s390_info_to_howto
4121 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4122 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4123 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4124 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4126 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4128 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4129 #define elf_backend_check_relocs elf_s390_check_relocs
4130 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4131 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4132 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4133 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4134 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4135 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4136 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4137 #define elf_backend_relocate_section elf_s390_relocate_section
4138 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4139 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4140 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4141 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4142 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4143 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4145 #define bfd_elf32_mkobject elf_s390_mkobject
4146 #define elf_backend_object_p elf_s390_object_p
4148 #include "elf32-target.h"