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
1115 case R_390_GOTOFF16:
1116 case R_390_GOTOFF32:
1118 case R_390_GOTPCDBL:
1119 /* These relocs do not need a GOT slot. They just load the
1120 GOT pointer itself or address something else relative to
1121 the GOT. Since the GOT pointer has been set up above we
1125 case R_390_PLT12DBL:
1126 case R_390_PLT16DBL:
1127 case R_390_PLT24DBL:
1128 case R_390_PLT32DBL:
1130 case R_390_PLTOFF16:
1131 case R_390_PLTOFF32:
1132 /* This symbol requires a procedure linkage table entry. We
1133 actually build the entry in adjust_dynamic_symbol,
1134 because this might be a case of linking PIC code which is
1135 never referenced by a dynamic object, in which case we
1136 don't need to generate a procedure linkage table entry
1139 /* If this is a local symbol, we resolve it directly without
1140 creating a procedure linkage table entry. */
1144 h->plt.refcount += 1;
1148 case R_390_GOTPLT12:
1149 case R_390_GOTPLT16:
1150 case R_390_GOTPLT20:
1151 case R_390_GOTPLT32:
1152 case R_390_GOTPLTENT:
1153 /* This symbol requires either a procedure linkage table entry
1154 or an entry in the local got. We actually build the entry
1155 in adjust_dynamic_symbol because whether this is really a
1156 global reference can change and with it the fact if we have
1157 to create a plt entry or a local got entry. To be able to
1158 make a once global symbol a local one we have to keep track
1159 of the number of gotplt references that exist for this
1163 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1165 h->plt.refcount += 1;
1168 local_got_refcounts[r_symndx] += 1;
1171 case R_390_TLS_LDM32:
1172 htab->tls_ldm_got.refcount += 1;
1175 case R_390_TLS_IE32:
1176 case R_390_TLS_GOTIE12:
1177 case R_390_TLS_GOTIE20:
1178 case R_390_TLS_GOTIE32:
1179 case R_390_TLS_IEENT:
1180 if (bfd_link_pic (info))
1181 info->flags |= DF_STATIC_TLS;
1189 case R_390_TLS_GD32:
1190 /* This symbol requires a global offset table entry. */
1199 tls_type = GOT_NORMAL;
1201 case R_390_TLS_GD32:
1202 tls_type = GOT_TLS_GD;
1204 case R_390_TLS_IE32:
1205 case R_390_TLS_GOTIE32:
1206 tls_type = GOT_TLS_IE;
1208 case R_390_TLS_GOTIE12:
1209 case R_390_TLS_GOTIE20:
1210 case R_390_TLS_IEENT:
1211 tls_type = GOT_TLS_IE_NLT;
1217 h->got.refcount += 1;
1218 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1222 local_got_refcounts[r_symndx] += 1;
1223 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1225 /* If a TLS symbol is accessed using IE at least once,
1226 there is no point to use dynamic model for it. */
1227 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1229 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1231 (*_bfd_error_handler)
1232 (_("%B: `%s' accessed both as normal and thread local symbol"),
1233 abfd, h->root.root.string);
1236 if (old_tls_type > tls_type)
1237 tls_type = old_tls_type;
1240 if (old_tls_type != tls_type)
1243 elf_s390_hash_entry (h)->tls_type = tls_type;
1245 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1248 if (r_type != R_390_TLS_IE32)
1252 case R_390_TLS_LE32:
1253 /* For static linking and executables this reloc will be
1254 calculated at linktime otherwise a TLS_TPOFF runtime
1255 reloc will be generated. */
1256 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1259 if (!bfd_link_pic (info))
1261 info->flags |= DF_STATIC_TLS;
1275 /* If this reloc is in a read-only section, we might
1276 need a copy reloc. We can't check reliably at this
1277 stage whether the section is read-only, as input
1278 sections have not yet been mapped to output sections.
1279 Tentatively set the flag for now, and correct in
1280 adjust_dynamic_symbol. */
1283 if (!bfd_link_pic (info))
1285 /* We may need a .plt entry if the function this reloc
1286 refers to is in a shared lib. */
1287 h->plt.refcount += 1;
1291 /* If we are creating a shared library, and this is a reloc
1292 against a global symbol, or a non PC relative reloc
1293 against a local symbol, then we need to copy the reloc
1294 into the shared library. However, if we are linking with
1295 -Bsymbolic, we do not need to copy a reloc against a
1296 global symbol which is defined in an object we are
1297 including in the link (i.e., DEF_REGULAR is set). At
1298 this point we have not seen all the input files, so it is
1299 possible that DEF_REGULAR is not set now but will be set
1300 later (it is never cleared). In case of a weak definition,
1301 DEF_REGULAR may be cleared later by a strong definition in
1302 a shared library. We account for that possibility below by
1303 storing information in the relocs_copied field of the hash
1304 table entry. A similar situation occurs when creating
1305 shared libraries and symbol visibility changes render the
1308 If on the other hand, we are creating an executable, we
1309 may need to keep relocations for symbols satisfied by a
1310 dynamic library if we manage to avoid copy relocs for the
1312 if ((bfd_link_pic (info)
1313 && (sec->flags & SEC_ALLOC) != 0
1314 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1315 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1316 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1317 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1318 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1319 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1321 && (! SYMBOLIC_BIND (info, h)
1322 || h->root.type == bfd_link_hash_defweak
1323 || !h->def_regular))))
1324 || (ELIMINATE_COPY_RELOCS
1325 && !bfd_link_pic (info)
1326 && (sec->flags & SEC_ALLOC) != 0
1328 && (h->root.type == bfd_link_hash_defweak
1329 || !h->def_regular)))
1331 struct elf_dyn_relocs *p;
1332 struct elf_dyn_relocs **head;
1334 /* We must copy these reloc types into the output file.
1335 Create a reloc section in dynobj and make room for
1339 if (htab->elf.dynobj == NULL)
1340 htab->elf.dynobj = abfd;
1342 sreloc = _bfd_elf_make_dynamic_reloc_section
1343 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1349 /* If this is a global symbol, we count the number of
1350 relocations we need for this symbol. */
1353 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1357 /* Track dynamic relocs needed for local syms too.
1358 We really need local syms available to do this
1363 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1368 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1372 vpp = &elf_section_data (s)->local_dynrel;
1373 head = (struct elf_dyn_relocs **) vpp;
1377 if (p == NULL || p->sec != sec)
1379 bfd_size_type amt = sizeof *p;
1381 p = ((struct elf_dyn_relocs *)
1382 bfd_alloc (htab->elf.dynobj, amt));
1393 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1394 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1395 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1396 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1397 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1398 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1403 /* This relocation describes the C++ object vtable hierarchy.
1404 Reconstruct it for later use during GC. */
1405 case R_390_GNU_VTINHERIT:
1406 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1410 /* This relocation describes which C++ vtable entries are actually
1411 used. Record for later use during GC. */
1412 case R_390_GNU_VTENTRY:
1413 BFD_ASSERT (h != NULL);
1415 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1427 /* Return the section that should be marked against GC for a given
1431 elf_s390_gc_mark_hook (asection *sec,
1432 struct bfd_link_info *info,
1433 Elf_Internal_Rela *rel,
1434 struct elf_link_hash_entry *h,
1435 Elf_Internal_Sym *sym)
1438 switch (ELF32_R_TYPE (rel->r_info))
1440 case R_390_GNU_VTINHERIT:
1441 case R_390_GNU_VTENTRY:
1444 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1448 /* Update the got entry reference counts for the section being removed. */
1451 elf_s390_gc_sweep_hook (bfd *abfd,
1452 struct bfd_link_info *info,
1454 const Elf_Internal_Rela *relocs)
1456 struct elf_s390_link_hash_table *htab;
1457 Elf_Internal_Shdr *symtab_hdr;
1458 struct elf_link_hash_entry **sym_hashes;
1459 bfd_signed_vma *local_got_refcounts;
1460 const Elf_Internal_Rela *rel, *relend;
1462 if (bfd_link_relocatable (info))
1465 htab = elf_s390_hash_table (info);
1469 elf_section_data (sec)->local_dynrel = NULL;
1471 symtab_hdr = &elf_symtab_hdr (abfd);
1472 sym_hashes = elf_sym_hashes (abfd);
1473 local_got_refcounts = elf_local_got_refcounts (abfd);
1475 relend = relocs + sec->reloc_count;
1476 for (rel = relocs; rel < relend; rel++)
1478 unsigned long r_symndx;
1479 unsigned int r_type;
1480 struct elf_link_hash_entry *h = NULL;
1482 r_symndx = ELF32_R_SYM (rel->r_info);
1483 if (r_symndx >= symtab_hdr->sh_info)
1485 struct elf_s390_link_hash_entry *eh;
1486 struct elf_dyn_relocs **pp;
1487 struct elf_dyn_relocs *p;
1489 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1490 while (h->root.type == bfd_link_hash_indirect
1491 || h->root.type == bfd_link_hash_warning)
1492 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1493 eh = (struct elf_s390_link_hash_entry *) h;
1495 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1498 /* Everything must go for SEC. */
1505 Elf_Internal_Sym *isym;
1507 /* A local symbol. */
1508 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1513 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1515 struct plt_entry *plt = elf_s390_local_plt (abfd);
1516 if (plt[r_symndx].plt.refcount > 0)
1517 plt[r_symndx].plt.refcount--;
1521 r_type = ELF32_R_TYPE (rel->r_info);
1522 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1525 case R_390_TLS_LDM32:
1526 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1527 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1530 case R_390_GOTOFF16:
1531 case R_390_GOTOFF32:
1533 case R_390_GOTPCDBL:
1536 case R_390_TLS_GD32:
1537 case R_390_TLS_IE32:
1538 case R_390_TLS_GOTIE12:
1539 case R_390_TLS_GOTIE20:
1540 case R_390_TLS_GOTIE32:
1541 case R_390_TLS_IEENT:
1549 if (h->got.refcount > 0)
1550 h->got.refcount -= 1;
1552 else if (local_got_refcounts != NULL)
1554 if (local_got_refcounts[r_symndx] > 0)
1555 local_got_refcounts[r_symndx] -= 1;
1570 if (bfd_link_pic (info))
1574 case R_390_PLT12DBL:
1575 case R_390_PLT16DBL:
1576 case R_390_PLT24DBL:
1577 case R_390_PLT32DBL:
1579 case R_390_PLTOFF16:
1580 case R_390_PLTOFF32:
1583 if (h->plt.refcount > 0)
1584 h->plt.refcount -= 1;
1588 case R_390_GOTPLT12:
1589 case R_390_GOTPLT16:
1590 case R_390_GOTPLT20:
1591 case R_390_GOTPLT32:
1592 case R_390_GOTPLTENT:
1595 if (h->plt.refcount > 0)
1597 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1598 h->plt.refcount -= 1;
1601 else if (local_got_refcounts != NULL)
1603 if (local_got_refcounts[r_symndx] > 0)
1604 local_got_refcounts[r_symndx] -= 1;
1616 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1617 entry but we found we will not create any. Called when we find we will
1618 not have any PLT for this symbol, by for example
1619 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1620 or elf_s390_size_dynamic_sections if no dynamic sections will be
1621 created (we're only linking static objects). */
1624 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1626 if (h->elf.root.type == bfd_link_hash_warning)
1627 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1629 if (h->gotplt_refcount <= 0)
1632 /* We simply add the number of gotplt references to the number
1633 * of got references for this symbol. */
1634 h->elf.got.refcount += h->gotplt_refcount;
1635 h->gotplt_refcount = -1;
1638 /* Adjust a symbol defined by a dynamic object and referenced by a
1639 regular object. The current definition is in some section of the
1640 dynamic object, but we're not including those sections. We have to
1641 change the definition to something the rest of the link can
1645 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1646 struct elf_link_hash_entry *h)
1648 struct elf_s390_link_hash_table *htab;
1651 /* STT_GNU_IFUNC symbol must go through PLT. */
1652 if (s390_is_ifunc_symbol_p (h))
1655 /* If this is a function, put it in the procedure linkage table. We
1656 will fill in the contents of the procedure linkage table later
1657 (although we could actually do it here). */
1658 if (h->type == STT_FUNC
1661 if (h->plt.refcount <= 0
1662 || SYMBOL_CALLS_LOCAL (info, h)
1663 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1664 && h->root.type != bfd_link_hash_undefweak))
1666 /* This case can occur if we saw a PLT32 reloc in an input
1667 file, but the symbol was never referred to by a dynamic
1668 object, or if all references were garbage collected. In
1669 such a case, we don't actually need to build a procedure
1670 linkage table, and we can just do a PC32 reloc instead. */
1671 h->plt.offset = (bfd_vma) -1;
1673 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1679 /* It's possible that we incorrectly decided a .plt reloc was
1680 needed for an R_390_PC32 reloc to a non-function sym in
1681 check_relocs. We can't decide accurately between function and
1682 non-function syms in check-relocs; Objects loaded later in
1683 the link may change h->type. So fix it now. */
1684 h->plt.offset = (bfd_vma) -1;
1686 /* If this is a weak symbol, and there is a real definition, the
1687 processor independent code will have arranged for us to see the
1688 real definition first, and we can just use the same value. */
1689 if (h->u.weakdef != NULL)
1691 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1692 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1693 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1694 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1695 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1696 h->non_got_ref = h->u.weakdef->non_got_ref;
1700 /* This is a reference to a symbol defined by a dynamic object which
1701 is not a function. */
1703 /* If we are creating a shared library, we must presume that the
1704 only references to the symbol are via the global offset table.
1705 For such cases we need not do anything here; the relocations will
1706 be handled correctly by relocate_section. */
1707 if (bfd_link_pic (info))
1710 /* If there are no references to this symbol that do not use the
1711 GOT, we don't need to generate a copy reloc. */
1712 if (!h->non_got_ref)
1715 /* If -z nocopyreloc was given, we won't generate them either. */
1716 if (info->nocopyreloc)
1722 if (ELIMINATE_COPY_RELOCS)
1724 struct elf_s390_link_hash_entry * eh;
1725 struct elf_dyn_relocs *p;
1727 eh = (struct elf_s390_link_hash_entry *) h;
1728 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1730 s = p->sec->output_section;
1731 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1735 /* If we didn't find any dynamic relocs in read-only sections, then
1736 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1744 /* We must allocate the symbol in our .dynbss section, which will
1745 become part of the .bss section of the executable. There will be
1746 an entry for this symbol in the .dynsym section. The dynamic
1747 object will contain position independent code, so all references
1748 from the dynamic object to this symbol will go through the global
1749 offset table. The dynamic linker will use the .dynsym entry to
1750 determine the address it must put in the global offset table, so
1751 both the dynamic object and the regular object will refer to the
1752 same memory location for the variable. */
1754 htab = elf_s390_hash_table (info);
1756 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1757 copy the initial value out of the dynamic object and into the
1758 runtime process image. */
1759 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1761 htab->srelbss->size += sizeof (Elf32_External_Rela);
1767 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1770 /* Allocate space in .plt, .got and associated reloc sections for
1774 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1776 struct bfd_link_info *info;
1777 struct elf_s390_link_hash_table *htab;
1778 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1779 struct elf_dyn_relocs *p;
1781 if (h->root.type == bfd_link_hash_indirect)
1784 info = (struct bfd_link_info *) inf;
1785 htab = elf_s390_hash_table (info);
1787 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1788 here if it is defined and referenced in a non-shared object. */
1789 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1790 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1791 else if (htab->elf.dynamic_sections_created
1792 && h->plt.refcount > 0)
1794 /* Make sure this symbol is output as a dynamic symbol.
1795 Undefined weak syms won't yet be marked as dynamic. */
1796 if (h->dynindx == -1
1797 && !h->forced_local)
1799 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1803 if (bfd_link_pic (info)
1804 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1806 asection *s = htab->elf.splt;
1808 /* If this is the first .plt entry, make room for the special
1811 s->size += PLT_FIRST_ENTRY_SIZE;
1813 h->plt.offset = s->size;
1815 /* If this symbol is not defined in a regular file, and we are
1816 not generating a shared library, then set the symbol to this
1817 location in the .plt. This is required to make function
1818 pointers compare as equal between the normal executable and
1819 the shared library. */
1820 if (! bfd_link_pic (info)
1823 h->root.u.def.section = s;
1824 h->root.u.def.value = h->plt.offset;
1827 /* Make room for this entry. */
1828 s->size += PLT_ENTRY_SIZE;
1830 /* We also need to make an entry in the .got.plt section, which
1831 will be placed in the .got section by the linker script. */
1832 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1834 /* We also need to make an entry in the .rela.plt section. */
1835 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1839 h->plt.offset = (bfd_vma) -1;
1841 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1846 h->plt.offset = (bfd_vma) -1;
1848 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1851 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1852 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1853 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1854 we can save the dynamic TLS relocation. */
1855 if (h->got.refcount > 0
1856 && !bfd_link_pic (info)
1858 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1860 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1861 /* For the GOTIE access without a literal pool entry the offset has
1862 to be stored somewhere. The immediate value in the instruction
1863 is not bit enough so the value is stored in the got. */
1865 h->got.offset = htab->elf.sgot->size;
1866 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1869 h->got.offset = (bfd_vma) -1;
1871 else if (h->got.refcount > 0)
1875 int tls_type = elf_s390_hash_entry(h)->tls_type;
1877 /* Make sure this symbol is output as a dynamic symbol.
1878 Undefined weak syms won't yet be marked as dynamic. */
1879 if (h->dynindx == -1
1880 && !h->forced_local)
1882 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1887 h->got.offset = s->size;
1888 s->size += GOT_ENTRY_SIZE;
1889 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1890 if (tls_type == GOT_TLS_GD)
1891 s->size += GOT_ENTRY_SIZE;
1892 dyn = htab->elf.dynamic_sections_created;
1893 /* R_390_TLS_IE32 needs one dynamic relocation,
1894 R_390_TLS_GD32 needs one if local symbol and two if global. */
1895 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1896 || tls_type >= GOT_TLS_IE)
1897 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1898 else if (tls_type == GOT_TLS_GD)
1899 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1900 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1901 || h->root.type != bfd_link_hash_undefweak)
1902 && (bfd_link_pic (info)
1903 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1904 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1907 h->got.offset = (bfd_vma) -1;
1909 if (eh->dyn_relocs == NULL)
1912 /* In the shared -Bsymbolic case, discard space allocated for
1913 dynamic pc-relative relocs against symbols which turn out to be
1914 defined in regular objects. For the normal shared case, discard
1915 space for pc-relative relocs that have become local due to symbol
1916 visibility changes. */
1918 if (bfd_link_pic (info))
1920 if (SYMBOL_CALLS_LOCAL (info, h))
1922 struct elf_dyn_relocs **pp;
1924 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1926 p->count -= p->pc_count;
1935 /* Also discard relocs on undefined weak syms with non-default
1937 if (eh->dyn_relocs != NULL
1938 && h->root.type == bfd_link_hash_undefweak)
1940 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1941 eh->dyn_relocs = NULL;
1943 /* Make sure undefined weak symbols are output as a dynamic
1945 else if (h->dynindx == -1
1946 && !h->forced_local)
1948 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1953 else if (ELIMINATE_COPY_RELOCS)
1955 /* For the non-shared case, discard space for relocs against
1956 symbols which turn out to need copy relocs or are not
1962 || (htab->elf.dynamic_sections_created
1963 && (h->root.type == bfd_link_hash_undefweak
1964 || h->root.type == bfd_link_hash_undefined))))
1966 /* Make sure this symbol is output as a dynamic symbol.
1967 Undefined weak syms won't yet be marked as dynamic. */
1968 if (h->dynindx == -1
1969 && !h->forced_local)
1971 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1975 /* If that succeeded, we know we'll be keeping all the
1977 if (h->dynindx != -1)
1981 eh->dyn_relocs = NULL;
1986 /* Finally, allocate space. */
1987 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1989 asection *sreloc = elf_section_data (p->sec)->sreloc;
1991 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1997 /* Find any dynamic relocs that apply to read-only sections. */
2000 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2002 struct elf_s390_link_hash_entry *eh;
2003 struct elf_dyn_relocs *p;
2005 eh = (struct elf_s390_link_hash_entry *) h;
2006 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2008 asection *s = p->sec->output_section;
2010 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2012 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2014 info->flags |= DF_TEXTREL;
2016 /* Not an error, just cut short the traversal. */
2023 /* Set the sizes of the dynamic sections. */
2026 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2027 struct bfd_link_info *info)
2029 struct elf_s390_link_hash_table *htab;
2035 htab = elf_s390_hash_table (info);
2036 dynobj = htab->elf.dynobj;
2040 if (htab->elf.dynamic_sections_created)
2042 /* Set the contents of the .interp section to the interpreter. */
2043 if (bfd_link_executable (info) && !info->nointerp)
2045 s = bfd_get_linker_section (dynobj, ".interp");
2048 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2049 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2053 /* Set up .got offsets for local syms, and space for local dynamic
2055 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2057 bfd_signed_vma *local_got;
2058 bfd_signed_vma *end_local_got;
2059 char *local_tls_type;
2060 bfd_size_type locsymcount;
2061 Elf_Internal_Shdr *symtab_hdr;
2063 struct plt_entry *local_plt;
2066 if (! is_s390_elf (ibfd))
2069 for (s = ibfd->sections; s != NULL; s = s->next)
2071 struct elf_dyn_relocs *p;
2073 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2075 if (!bfd_is_abs_section (p->sec)
2076 && bfd_is_abs_section (p->sec->output_section))
2078 /* Input section has been discarded, either because
2079 it is a copy of a linkonce section or due to
2080 linker script /DISCARD/, so we'll be discarding
2083 else if (p->count != 0)
2085 srela = elf_section_data (p->sec)->sreloc;
2086 srela->size += p->count * sizeof (Elf32_External_Rela);
2087 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2088 info->flags |= DF_TEXTREL;
2093 local_got = elf_local_got_refcounts (ibfd);
2097 symtab_hdr = &elf_symtab_hdr (ibfd);
2098 locsymcount = symtab_hdr->sh_info;
2099 end_local_got = local_got + locsymcount;
2100 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2102 srela = htab->elf.srelgot;
2103 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2107 *local_got = s->size;
2108 s->size += GOT_ENTRY_SIZE;
2109 if (*local_tls_type == GOT_TLS_GD)
2110 s->size += GOT_ENTRY_SIZE;
2111 if (bfd_link_pic (info))
2112 srela->size += sizeof (Elf32_External_Rela);
2115 *local_got = (bfd_vma) -1;
2117 local_plt = elf_s390_local_plt (ibfd);
2118 for (i = 0; i < symtab_hdr->sh_info; i++)
2120 if (local_plt[i].plt.refcount > 0)
2122 local_plt[i].plt.offset = htab->elf.iplt->size;
2123 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2124 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2125 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2128 local_plt[i].plt.offset = (bfd_vma) -1;
2132 if (htab->tls_ldm_got.refcount > 0)
2134 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2136 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2137 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2138 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2141 htab->tls_ldm_got.offset = -1;
2143 /* Allocate global sym .plt and .got entries, and space for global
2144 sym dynamic relocs. */
2145 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2147 /* We now have determined the sizes of the various dynamic sections.
2148 Allocate memory for them. */
2150 for (s = dynobj->sections; s != NULL; s = s->next)
2152 if ((s->flags & SEC_LINKER_CREATED) == 0)
2155 if (s == htab->elf.splt
2156 || s == htab->elf.sgot
2157 || s == htab->elf.sgotplt
2158 || s == htab->sdynbss
2159 || s == htab->elf.iplt
2160 || s == htab->elf.igotplt
2161 || s == htab->irelifunc)
2163 /* Strip this section if we don't need it; see the
2166 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2171 /* We use the reloc_count field as a counter if we need
2172 to copy relocs into the output file. */
2177 /* It's not one of our sections, so don't allocate space. */
2183 /* If we don't need this section, strip it from the
2184 output file. This is to handle .rela.bss and
2185 .rela.plt. We must create it in
2186 create_dynamic_sections, because it must be created
2187 before the linker maps input sections to output
2188 sections. The linker does that before
2189 adjust_dynamic_symbol is called, and it is that
2190 function which decides whether anything needs to go
2191 into these sections. */
2193 s->flags |= SEC_EXCLUDE;
2197 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2200 /* Allocate memory for the section contents. We use bfd_zalloc
2201 here in case unused entries are not reclaimed before the
2202 section's contents are written out. This should not happen,
2203 but this way if it does, we get a R_390_NONE reloc instead
2205 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2206 if (s->contents == NULL)
2210 if (htab->elf.dynamic_sections_created)
2212 /* Add some entries to the .dynamic section. We fill in the
2213 values later, in elf_s390_finish_dynamic_sections, but we
2214 must add the entries now so that we get the correct size for
2215 the .dynamic section. The DT_DEBUG entry is filled in by the
2216 dynamic linker and used by the debugger. */
2217 #define add_dynamic_entry(TAG, VAL) \
2218 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2220 if (bfd_link_executable (info))
2222 if (!add_dynamic_entry (DT_DEBUG, 0))
2226 if (htab->elf.splt->size != 0)
2228 if (!add_dynamic_entry (DT_PLTGOT, 0)
2229 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2230 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2231 || !add_dynamic_entry (DT_JMPREL, 0))
2237 if (!add_dynamic_entry (DT_RELA, 0)
2238 || !add_dynamic_entry (DT_RELASZ, 0)
2239 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2242 /* If any dynamic relocs apply to a read-only section,
2243 then we need a DT_TEXTREL entry. */
2244 if ((info->flags & DF_TEXTREL) == 0)
2245 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2247 if ((info->flags & DF_TEXTREL) != 0)
2249 if (!add_dynamic_entry (DT_TEXTREL, 0))
2254 #undef add_dynamic_entry
2259 /* Return the base VMA address which should be subtracted from real addresses
2260 when resolving @dtpoff relocation.
2261 This is PT_TLS segment p_vaddr. */
2264 dtpoff_base (struct bfd_link_info *info)
2266 /* If tls_sec is NULL, we should have signalled an error already. */
2267 if (elf_hash_table (info)->tls_sec == NULL)
2269 return elf_hash_table (info)->tls_sec->vma;
2272 /* Return the relocation value for @tpoff relocation
2273 if STT_TLS virtual address is ADDRESS. */
2276 tpoff (struct bfd_link_info *info, bfd_vma address)
2278 struct elf_link_hash_table *htab = elf_hash_table (info);
2280 /* If tls_sec is NULL, we should have signalled an error already. */
2281 if (htab->tls_sec == NULL)
2283 return htab->tls_size + htab->tls_sec->vma - address;
2286 /* Complain if TLS instruction relocation is against an invalid
2290 invalid_tls_insn (bfd *input_bfd,
2291 asection *input_section,
2292 Elf_Internal_Rela *rel)
2294 reloc_howto_type *howto;
2296 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2297 (*_bfd_error_handler)
2298 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2301 (long) rel->r_offset,
2303 bfd_set_error (bfd_error_bad_value);
2306 /* Relocate a 390 ELF section. */
2309 elf_s390_relocate_section (bfd *output_bfd,
2310 struct bfd_link_info *info,
2312 asection *input_section,
2314 Elf_Internal_Rela *relocs,
2315 Elf_Internal_Sym *local_syms,
2316 asection **local_sections)
2318 struct elf_s390_link_hash_table *htab;
2319 Elf_Internal_Shdr *symtab_hdr;
2320 struct elf_link_hash_entry **sym_hashes;
2321 bfd_vma *local_got_offsets;
2322 Elf_Internal_Rela *rel;
2323 Elf_Internal_Rela *relend;
2325 BFD_ASSERT (is_s390_elf (input_bfd));
2327 htab = elf_s390_hash_table (info);
2328 symtab_hdr = &elf_symtab_hdr (input_bfd);
2329 sym_hashes = elf_sym_hashes (input_bfd);
2330 local_got_offsets = elf_local_got_offsets (input_bfd);
2333 relend = relocs + input_section->reloc_count;
2334 for (; rel < relend; rel++)
2336 unsigned int r_type;
2337 reloc_howto_type *howto;
2338 unsigned long r_symndx;
2339 struct elf_link_hash_entry *h;
2340 Elf_Internal_Sym *sym;
2344 bfd_boolean unresolved_reloc;
2345 bfd_reloc_status_type r;
2347 asection *base_got = htab->elf.sgot;
2349 r_type = ELF32_R_TYPE (rel->r_info);
2350 if (r_type == (int) R_390_GNU_VTINHERIT
2351 || r_type == (int) R_390_GNU_VTENTRY)
2353 if (r_type >= (int) R_390_max)
2355 bfd_set_error (bfd_error_bad_value);
2359 howto = elf_howto_table + r_type;
2360 r_symndx = ELF32_R_SYM (rel->r_info);
2365 unresolved_reloc = FALSE;
2366 if (r_symndx < symtab_hdr->sh_info)
2368 sym = local_syms + r_symndx;
2369 sec = local_sections[r_symndx];
2370 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2372 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2373 if (local_plt == NULL)
2376 /* Address of the PLT slot. */
2377 relocation = (htab->elf.iplt->output_section->vma
2378 + htab->elf.iplt->output_offset
2379 + local_plt[r_symndx].plt.offset);
2383 case R_390_PLTOFF16:
2384 case R_390_PLTOFF32:
2385 relocation -= htab->elf.sgot->output_section->vma;
2387 case R_390_GOTPLT12:
2388 case R_390_GOTPLT16:
2389 case R_390_GOTPLT20:
2390 case R_390_GOTPLT32:
2391 case R_390_GOTPLTENT:
2398 /* Write the PLT slot address into the GOT slot. */
2399 bfd_put_32 (output_bfd, relocation,
2400 htab->elf.sgot->contents +
2401 local_got_offsets[r_symndx]);
2402 relocation = (local_got_offsets[r_symndx] +
2403 htab->elf.sgot->output_offset);
2405 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2406 relocation += htab->elf.sgot->output_section->vma;
2412 /* The output section is needed later in
2413 finish_dynamic_section when creating the dynamic
2415 local_plt[r_symndx].sec = sec;
2419 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2423 bfd_boolean warned ATTRIBUTE_UNUSED;
2424 bfd_boolean ignored ATTRIBUTE_UNUSED;
2426 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2427 r_symndx, symtab_hdr, sym_hashes,
2429 unresolved_reloc, warned, ignored);
2432 if (sec != NULL && discarded_section (sec))
2433 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2434 rel, 1, relend, howto, 0, contents);
2436 if (bfd_link_relocatable (info))
2441 case R_390_GOTPLT12:
2442 case R_390_GOTPLT16:
2443 case R_390_GOTPLT20:
2444 case R_390_GOTPLT32:
2445 case R_390_GOTPLTENT:
2446 /* There are three cases for a GOTPLT relocation. 1) The
2447 relocation is against the jump slot entry of a plt that
2448 will get emitted to the output file. 2) The relocation
2449 is against the jump slot of a plt entry that has been
2450 removed. elf_s390_adjust_gotplt has created a GOT entry
2451 as replacement. 3) The relocation is against a local symbol.
2452 Cases 2) and 3) are the same as the GOT relocation code
2453 so we just have to test for case 1 and fall through for
2455 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2459 if (s390_is_ifunc_symbol_p (h))
2461 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2462 relocation = (plt_index * GOT_ENTRY_SIZE +
2463 htab->elf.igotplt->output_offset);
2464 if (r_type == R_390_GOTPLTENT)
2465 relocation += htab->elf.igotplt->output_section->vma;
2470 Current offset - size first entry / entry size. */
2471 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2474 /* Offset in GOT is PLT index plus GOT headers(3)
2475 times 4, addr & GOT addr. */
2476 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2477 if (r_type == R_390_GOTPLTENT)
2478 relocation += htab->elf.sgot->output_section->vma;
2480 unresolved_reloc = FALSE;
2490 /* Relocation is to the entry for this symbol in the global
2492 if (base_got == NULL)
2499 off = h->got.offset;
2500 dyn = htab->elf.dynamic_sections_created;
2502 if (s390_is_ifunc_symbol_p (h))
2504 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2505 if (off == (bfd_vma)-1)
2507 /* No explicit GOT usage so redirect to the
2509 base_got = htab->elf.igotplt;
2510 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2514 /* Explicit GOT slots must contain the address
2515 of the PLT slot. This will be handled in
2516 finish_dynamic_symbol. */
2519 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2520 bfd_link_pic (info),
2522 || (bfd_link_pic (info)
2523 && SYMBOL_REFERENCES_LOCAL (info, h))
2524 || (ELF_ST_VISIBILITY (h->other)
2525 && h->root.type == bfd_link_hash_undefweak))
2528 /* This is actually a static link, or it is a
2529 -Bsymbolic link and the symbol is defined
2530 locally, or the symbol was forced to be local
2531 because of a version file. We must initialize
2532 this entry in the global offset table. Since the
2533 offset must always be a multiple of 2, we use the
2534 least significant bit to record whether we have
2535 initialized it already.
2537 When doing a dynamic link, we create a .rel.got
2538 relocation entry to initialize the value. This
2539 is done in the finish_dynamic_symbol routine. */
2544 bfd_put_32 (output_bfd, relocation,
2545 base_got->contents + off);
2550 && bfd_link_pic (info)
2551 && SYMBOL_REFERENCES_LOCAL (info, h))
2552 /* lrl rx,sym@GOTENT -> larl rx, sym */
2553 && ((r_type == R_390_GOTENT
2554 && (bfd_get_16 (input_bfd,
2555 contents + rel->r_offset - 2)
2556 & 0xff0f) == 0xc40d)
2557 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2558 || (r_type == R_390_GOT20
2559 && (bfd_get_32 (input_bfd,
2560 contents + rel->r_offset - 2)
2561 & 0xff00f000) == 0xe300c000
2562 && bfd_get_8 (input_bfd,
2563 contents + rel->r_offset + 3) == 0x58)))
2565 unsigned short new_insn =
2566 (0xc000 | (bfd_get_8 (input_bfd,
2567 contents + rel->r_offset - 1) & 0xf0));
2568 bfd_put_16 (output_bfd, new_insn,
2569 contents + rel->r_offset - 2);
2570 r_type = R_390_PC32DBL;
2572 howto = elf_howto_table + r_type;
2573 relocation = h->root.u.def.value
2574 + h->root.u.def.section->output_section->vma
2575 + h->root.u.def.section->output_offset;
2580 unresolved_reloc = FALSE;
2584 if (local_got_offsets == NULL)
2587 off = local_got_offsets[r_symndx];
2589 /* The offset must always be a multiple of 4. We use
2590 the least significant bit to record whether we have
2591 already generated the necessary reloc. */
2596 bfd_put_32 (output_bfd, relocation,
2597 htab->elf.sgot->contents + off);
2599 if (bfd_link_pic (info))
2602 Elf_Internal_Rela outrel;
2605 srelgot = htab->elf.srelgot;
2606 if (srelgot == NULL)
2609 outrel.r_offset = (htab->elf.sgot->output_section->vma
2610 + htab->elf.sgot->output_offset
2612 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2613 outrel.r_addend = relocation;
2614 loc = srelgot->contents;
2615 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2616 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2619 local_got_offsets[r_symndx] |= 1;
2623 if (off >= (bfd_vma) -2)
2626 relocation = base_got->output_offset + off;
2628 /* For @GOTENT the relocation is against the offset between
2629 the instruction and the symbols entry in the GOT and not
2630 between the start of the GOT and the symbols entry. We
2631 add the vma of the GOT to get the correct value. */
2632 if ( r_type == R_390_GOTENT
2633 || r_type == R_390_GOTPLTENT)
2634 relocation += base_got->output_section->vma;
2638 case R_390_GOTOFF16:
2639 case R_390_GOTOFF32:
2640 /* Relocation is relative to the start of the global offset
2643 /* Note that sgot->output_offset is not involved in this
2644 calculation. We always want the start of .got. If we
2645 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2646 permitted by the ABI, we might have to change this
2648 relocation -= htab->elf.sgot->output_section->vma;
2652 case R_390_GOTPCDBL:
2653 /* Use global offset table as symbol value. */
2654 relocation = htab->elf.sgot->output_section->vma;
2655 unresolved_reloc = FALSE;
2658 case R_390_PLT12DBL:
2659 case R_390_PLT16DBL:
2660 case R_390_PLT24DBL:
2661 case R_390_PLT32DBL:
2663 /* Relocation is to the entry for this symbol in the
2664 procedure linkage table. */
2666 /* Resolve a PLT32 reloc against a local symbol directly,
2667 without using the procedure linkage table. */
2671 if (h->plt.offset == (bfd_vma) -1
2672 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2674 /* We didn't make a PLT entry for this symbol. This
2675 happens when statically linking PIC code, or when
2676 using -Bsymbolic. */
2680 if (s390_is_ifunc_symbol_p (h))
2681 relocation = (htab->elf.iplt->output_section->vma
2682 + htab->elf.iplt->output_offset
2685 relocation = (htab->elf.splt->output_section->vma
2686 + htab->elf.splt->output_offset
2688 unresolved_reloc = FALSE;
2691 case R_390_PLTOFF16:
2692 case R_390_PLTOFF32:
2693 /* Relocation is to the entry for this symbol in the
2694 procedure linkage table relative to the start of the GOT. */
2696 /* For local symbols or if we didn't make a PLT entry for
2697 this symbol resolve the symbol directly. */
2699 || h->plt.offset == (bfd_vma) -1
2700 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2702 relocation -= htab->elf.sgot->output_section->vma;
2706 if (s390_is_ifunc_symbol_p (h))
2707 relocation = (htab->elf.iplt->output_section->vma
2708 + htab->elf.iplt->output_offset
2710 - htab->elf.sgot->output_section->vma);
2712 relocation = (htab->elf.splt->output_section->vma
2713 + htab->elf.splt->output_offset
2715 - htab->elf.sgot->output_section->vma);
2716 unresolved_reloc = FALSE;
2729 && s390_is_ifunc_symbol_p (h)
2732 if (!bfd_link_pic (info) || !h->non_got_ref)
2734 /* For a non-shared object STT_GNU_IFUNC symbol must
2736 relocation = (htab->elf.iplt->output_section->vma
2737 + htab->elf.iplt->output_offset
2743 /* For shared objects a runtime relocation is needed. */
2745 Elf_Internal_Rela outrel;
2748 /* Need a dynamic relocation to get the real function
2750 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2754 if (outrel.r_offset == (bfd_vma) -1
2755 || outrel.r_offset == (bfd_vma) -2)
2758 outrel.r_offset += (input_section->output_section->vma
2759 + input_section->output_offset);
2761 if (h->dynindx == -1
2763 || bfd_link_executable (info))
2765 /* This symbol is resolved locally. */
2766 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2767 outrel.r_addend = (h->root.u.def.value
2768 + h->root.u.def.section->output_section->vma
2769 + h->root.u.def.section->output_offset);
2773 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2774 outrel.r_addend = 0;
2777 sreloc = htab->elf.irelifunc;
2778 elf_append_rela (output_bfd, sreloc, &outrel);
2780 /* If this reloc is against an external symbol, we
2781 do not want to fiddle with the addend. Otherwise,
2782 we need to include the symbol value so that it
2783 becomes an addend for the dynamic reloc. For an
2784 internal symbol, we have updated addend. */
2789 if ((input_section->flags & SEC_ALLOC) == 0)
2792 if ((bfd_link_pic (info)
2794 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2795 || h->root.type != bfd_link_hash_undefweak)
2796 && ((r_type != R_390_PC16
2797 && r_type != R_390_PC12DBL
2798 && r_type != R_390_PC16DBL
2799 && r_type != R_390_PC24DBL
2800 && r_type != R_390_PC32DBL
2801 && r_type != R_390_PC32)
2802 || !SYMBOL_CALLS_LOCAL (info, h)))
2803 || (ELIMINATE_COPY_RELOCS
2804 && !bfd_link_pic (info)
2810 || h->root.type == bfd_link_hash_undefweak
2811 || h->root.type == bfd_link_hash_undefined)))
2813 Elf_Internal_Rela outrel;
2814 bfd_boolean skip, relocate;
2818 /* When generating a shared object, these relocations
2819 are copied into the output file to be resolved at run
2826 _bfd_elf_section_offset (output_bfd, info, input_section,
2828 if (outrel.r_offset == (bfd_vma) -1)
2830 else if (outrel.r_offset == (bfd_vma) -2)
2831 skip = TRUE, relocate = TRUE;
2832 outrel.r_offset += (input_section->output_section->vma
2833 + input_section->output_offset);
2836 memset (&outrel, 0, sizeof outrel);
2839 && (r_type == R_390_PC16
2840 || r_type == R_390_PC12DBL
2841 || r_type == R_390_PC16DBL
2842 || r_type == R_390_PC24DBL
2843 || r_type == R_390_PC32DBL
2844 || r_type == R_390_PC32
2845 || !bfd_link_pic (info)
2846 || !SYMBOLIC_BIND (info, h)
2847 || !h->def_regular))
2849 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2850 outrel.r_addend = rel->r_addend;
2854 /* This symbol is local, or marked to become local. */
2855 outrel.r_addend = relocation + rel->r_addend;
2856 if (r_type == R_390_32)
2859 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2865 if (bfd_is_abs_section (sec))
2867 else if (sec == NULL || sec->owner == NULL)
2869 bfd_set_error(bfd_error_bad_value);
2876 osec = sec->output_section;
2877 sindx = elf_section_data (osec)->dynindx;
2880 osec = htab->elf.text_index_section;
2881 sindx = elf_section_data (osec)->dynindx;
2883 BFD_ASSERT (sindx != 0);
2885 /* We are turning this relocation into one
2886 against a section symbol, so subtract out
2887 the output section's address but not the
2888 offset of the input section in the output
2890 outrel.r_addend -= osec->vma;
2892 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2896 sreloc = elf_section_data (input_section)->sreloc;
2900 loc = sreloc->contents;
2901 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2902 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2904 /* If this reloc is against an external symbol, we do
2905 not want to fiddle with the addend. Otherwise, we
2906 need to include the symbol value so that it becomes
2907 an addend for the dynamic reloc. */
2913 /* Relocations for tls literal pool entries. */
2914 case R_390_TLS_IE32:
2915 if (bfd_link_pic (info))
2917 Elf_Internal_Rela outrel;
2921 outrel.r_offset = rel->r_offset
2922 + input_section->output_section->vma
2923 + input_section->output_offset;
2924 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2925 sreloc = elf_section_data (input_section)->sreloc;
2928 loc = sreloc->contents;
2929 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2930 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2934 case R_390_TLS_GD32:
2935 case R_390_TLS_GOTIE32:
2936 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2937 tls_type = GOT_UNKNOWN;
2938 if (h == NULL && local_got_offsets)
2939 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2942 tls_type = elf_s390_hash_entry(h)->tls_type;
2943 if (!bfd_link_pic (info)
2945 && tls_type >= GOT_TLS_IE)
2946 r_type = R_390_TLS_LE32;
2948 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2949 r_type = R_390_TLS_IE32;
2951 if (r_type == R_390_TLS_LE32)
2953 /* This relocation gets optimized away by the local exec
2954 access optimization. */
2955 BFD_ASSERT (! unresolved_reloc);
2956 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2957 contents + rel->r_offset);
2961 if (htab->elf.sgot == NULL)
2965 off = h->got.offset;
2968 if (local_got_offsets == NULL)
2971 off = local_got_offsets[r_symndx];
2980 Elf_Internal_Rela outrel;
2984 if (htab->elf.srelgot == NULL)
2987 outrel.r_offset = (htab->elf.sgot->output_section->vma
2988 + htab->elf.sgot->output_offset + off);
2990 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2991 if (r_type == R_390_TLS_GD32)
2992 dr_type = R_390_TLS_DTPMOD;
2994 dr_type = R_390_TLS_TPOFF;
2995 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2996 outrel.r_addend = relocation - dtpoff_base (info);
2998 outrel.r_addend = 0;
2999 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3000 loc = htab->elf.srelgot->contents;
3001 loc += htab->elf.srelgot->reloc_count++
3002 * sizeof (Elf32_External_Rela);
3003 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3005 if (r_type == R_390_TLS_GD32)
3009 BFD_ASSERT (! unresolved_reloc);
3010 bfd_put_32 (output_bfd,
3011 relocation - dtpoff_base (info),
3012 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3016 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3017 outrel.r_offset += GOT_ENTRY_SIZE;
3018 outrel.r_addend = 0;
3019 htab->elf.srelgot->reloc_count++;
3020 loc += sizeof (Elf32_External_Rela);
3021 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3028 local_got_offsets[r_symndx] |= 1;
3031 if (off >= (bfd_vma) -2)
3033 if (r_type == ELF32_R_TYPE (rel->r_info))
3035 relocation = htab->elf.sgot->output_offset + off;
3036 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3037 relocation += htab->elf.sgot->output_section->vma;
3038 unresolved_reloc = FALSE;
3042 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3043 contents + rel->r_offset);
3048 case R_390_TLS_GOTIE12:
3049 case R_390_TLS_GOTIE20:
3050 case R_390_TLS_IEENT:
3053 if (local_got_offsets == NULL)
3055 off = local_got_offsets[r_symndx];
3056 if (bfd_link_pic (info))
3057 goto emit_tls_relocs;
3061 off = h->got.offset;
3062 tls_type = elf_s390_hash_entry(h)->tls_type;
3063 if (bfd_link_pic (info)
3065 || tls_type < GOT_TLS_IE)
3066 goto emit_tls_relocs;
3069 if (htab->elf.sgot == NULL)
3072 BFD_ASSERT (! unresolved_reloc);
3073 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3074 htab->elf.sgot->contents + off);
3075 relocation = htab->elf.sgot->output_offset + off;
3076 if (r_type == R_390_TLS_IEENT)
3077 relocation += htab->elf.sgot->output_section->vma;
3078 unresolved_reloc = FALSE;
3081 case R_390_TLS_LDM32:
3082 if (! bfd_link_pic (info))
3083 /* The literal pool entry this relocation refers to gets ignored
3084 by the optimized code of the local exec model. Do nothing
3085 and the value will turn out zero. */
3088 if (htab->elf.sgot == NULL)
3091 off = htab->tls_ldm_got.offset;
3096 Elf_Internal_Rela outrel;
3099 if (htab->elf.srelgot == NULL)
3102 outrel.r_offset = (htab->elf.sgot->output_section->vma
3103 + htab->elf.sgot->output_offset + off);
3105 bfd_put_32 (output_bfd, 0,
3106 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3107 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3108 outrel.r_addend = 0;
3109 loc = htab->elf.srelgot->contents;
3110 loc += htab->elf.srelgot->reloc_count++
3111 * sizeof (Elf32_External_Rela);
3112 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3113 htab->tls_ldm_got.offset |= 1;
3115 relocation = htab->elf.sgot->output_offset + off;
3116 unresolved_reloc = FALSE;
3119 case R_390_TLS_LE32:
3120 if (bfd_link_dll (info))
3122 /* Linking a shared library with non-fpic code requires
3123 a R_390_TLS_TPOFF relocation. */
3124 Elf_Internal_Rela outrel;
3129 outrel.r_offset = rel->r_offset
3130 + input_section->output_section->vma
3131 + input_section->output_offset;
3132 if (h != NULL && h->dynindx != -1)
3136 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3138 outrel.r_addend = relocation - dtpoff_base (info);
3140 outrel.r_addend = 0;
3141 sreloc = elf_section_data (input_section)->sreloc;
3144 loc = sreloc->contents;
3145 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3146 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3150 BFD_ASSERT (! unresolved_reloc);
3151 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3152 contents + rel->r_offset);
3156 case R_390_TLS_LDO32:
3157 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3158 relocation -= dtpoff_base (info);
3160 /* When converting LDO to LE, we must negate. */
3161 relocation = -tpoff (info, relocation);
3164 /* Relocations for tls instructions. */
3165 case R_390_TLS_LOAD:
3166 case R_390_TLS_GDCALL:
3167 case R_390_TLS_LDCALL:
3168 tls_type = GOT_UNKNOWN;
3169 if (h == NULL && local_got_offsets)
3170 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3172 tls_type = elf_s390_hash_entry(h)->tls_type;
3174 if (tls_type == GOT_TLS_GD)
3177 if (r_type == R_390_TLS_LOAD)
3179 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3181 /* IE->LE transition. Four valid cases:
3182 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3183 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3184 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3185 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3186 unsigned int insn, ry;
3188 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3190 if ((insn & 0xff00f000) == 0x58000000)
3191 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3192 ry = (insn & 0x000f0000);
3193 else if ((insn & 0xff0f0000) == 0x58000000)
3194 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3195 ry = (insn & 0x0000f000) << 4;
3196 else if ((insn & 0xff00f000) == 0x5800c000)
3197 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3198 ry = (insn & 0x000f0000);
3199 else if ((insn & 0xff0f0000) == 0x580c0000)
3200 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3201 ry = (insn & 0x0000f000) << 4;
3203 invalid_tls_insn (input_bfd, input_section, rel);
3204 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3205 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3208 else if (r_type == R_390_TLS_GDCALL)
3212 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3213 if ((insn & 0xff000fff) != 0x4d000000 &&
3214 (insn & 0xffff0000) != 0xc0e50000 &&
3215 (insn & 0xff000000) != 0x0d000000)
3216 invalid_tls_insn (input_bfd, input_section, rel);
3217 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3219 if ((insn & 0xff000000) == 0x0d000000)
3221 /* GD->LE transition.
3222 basr rx, ry -> nopr r7 */
3223 insn = 0x07070000 | (insn & 0xffff);
3225 else if ((insn & 0xff000000) == 0x4d000000)
3227 /* GD->LE transition.
3228 bas %r14,0(%rx,%r13) -> bc 0,0 */
3233 /* GD->LE transition.
3234 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3236 bfd_put_16 (output_bfd, 0x0000,
3237 contents + rel->r_offset + 4);
3242 /* If basr is used in the pic case to invoke
3243 _tls_get_offset, something went wrong before. */
3244 if ((insn & 0xff000000) == 0x0d000000)
3245 invalid_tls_insn (input_bfd, input_section, rel);
3247 if ((insn & 0xff000000) == 0x4d000000)
3249 /* GD->IE transition.
3250 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3255 /* GD->IE transition.
3256 brasl %r14,__tls_get_addr@plt ->
3257 l %r2,0(%r2,%r12) ; bcr 0,0 */
3259 bfd_put_16 (output_bfd, 0x0700,
3260 contents + rel->r_offset + 4);
3263 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3265 else if (r_type == R_390_TLS_LDCALL)
3267 if (!bfd_link_pic (info))
3271 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3272 if ((insn & 0xff000fff) != 0x4d000000 &&
3273 (insn & 0xffff0000) != 0xc0e50000 &&
3274 (insn & 0xff000000) != 0x0d000000)
3275 invalid_tls_insn (input_bfd, input_section, rel);
3277 if ((insn & 0xff000000) == 0x0d000000)
3279 /* LD->LE transition.
3280 basr rx, ry -> nopr r7 */
3281 insn = 0x07070000 | (insn & 0xffff);
3283 else if ((insn & 0xff000000) == 0x4d000000)
3285 /* LD->LE transition.
3286 bas %r14,0(%rx,%r13) -> bc 0,0 */
3291 /* LD->LE transition.
3292 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3294 bfd_put_16 (output_bfd, 0x0000,
3295 contents + rel->r_offset + 4);
3297 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3306 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3307 because such sections are not SEC_ALLOC and thus ld.so will
3308 not process them. */
3309 if (unresolved_reloc
3310 && !((input_section->flags & SEC_DEBUGGING) != 0
3312 && _bfd_elf_section_offset (output_bfd, info, input_section,
3313 rel->r_offset) != (bfd_vma) -1)
3314 (*_bfd_error_handler)
3315 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3318 (long) rel->r_offset,
3320 h->root.root.string);
3324 /* When applying a 24 bit reloc we need to start one byte
3325 earlier. Otherwise the 32 bit get/put bfd operations might
3326 access a byte after the actual section. */
3327 if (r_type == R_390_PC24DBL
3328 || r_type == R_390_PLT24DBL)
3331 if (r_type == R_390_20
3332 || r_type == R_390_GOT20
3333 || r_type == R_390_GOTPLT20
3334 || r_type == R_390_TLS_GOTIE20)
3336 relocation += rel->r_addend;
3337 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3338 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3339 contents, rel->r_offset,
3343 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3344 contents, rel->r_offset,
3345 relocation, rel->r_addend);
3347 if (r != bfd_reloc_ok)
3352 name = h->root.root.string;
3355 name = bfd_elf_string_from_elf_section (input_bfd,
3356 symtab_hdr->sh_link,
3361 name = bfd_section_name (input_bfd, sec);
3364 if (r == bfd_reloc_overflow)
3367 if (! ((*info->callbacks->reloc_overflow)
3368 (info, (h ? &h->root : NULL), name, howto->name,
3369 (bfd_vma) 0, input_bfd, input_section,
3375 (*_bfd_error_handler)
3376 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3377 input_bfd, input_section,
3378 (long) rel->r_offset, name, (int) r);
3387 /* Generate the PLT slots together with the dynamic relocations needed
3388 for IFUNC symbols. */
3391 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3392 struct bfd_link_info *info,
3393 struct elf_link_hash_entry *h,
3394 struct elf_s390_link_hash_table *htab,
3395 bfd_vma iplt_offset,
3396 bfd_vma resolver_address)
3400 bfd_vma igotiplt_offset;
3401 Elf_Internal_Rela rela;
3403 asection *plt, *gotplt, *relplt;
3404 bfd_vma relative_offset;
3406 if (htab->elf.iplt == NULL
3407 || htab->elf.igotplt == NULL
3408 || htab->elf.irelplt == NULL)
3411 gotplt = htab->elf.igotplt;
3412 relplt = htab->elf.irelplt;
3414 /* Index of the PLT slot within iplt section. */
3415 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3416 plt = htab->elf.iplt;
3417 /* Offset into the igot.plt section. */
3418 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3419 /* Offset into the got section. */
3420 got_offset = igotiplt_offset + gotplt->output_offset;
3422 /* S390 uses halfwords for relative branch calc! */
3423 relative_offset = - (plt->output_offset +
3424 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3425 /* If offset is > 32768, branch to a previous branch
3426 390 can only handle +-64 K jumps. */
3427 if ( -32768 > (int) relative_offset )
3429 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3431 /* Fill in the entry in the procedure linkage table. */
3432 if (!bfd_link_pic (info))
3434 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3437 /* Adjust jump to the first plt entry. */
3438 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3439 plt->contents + iplt_offset + 20);
3441 /* Push the GOT offset field. */
3442 bfd_put_32 (output_bfd,
3443 (gotplt->output_section->vma
3445 plt->contents + iplt_offset + 24);
3447 else if (got_offset < 4096)
3449 /* The GOT offset is small enough to be used directly as
3451 memcpy (plt->contents + iplt_offset,
3452 elf_s390_plt_pic12_entry,
3455 /* Put in the GOT offset as displacement value. The 0xc000
3456 value comes from the first word of the plt entry. Look
3457 at the elf_s390_plt_pic16_entry content. */
3458 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3459 plt->contents + iplt_offset + 2);
3461 /* Adjust the jump to the first plt entry. */
3462 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3463 plt->contents + iplt_offset + 20);
3465 else if (got_offset < 32768)
3467 /* The GOT offset is too big for a displacement but small
3468 enough to be a signed 16 bit immediate value as it can be
3469 used in an lhi instruction. */
3470 memcpy (plt->contents + iplt_offset,
3471 elf_s390_plt_pic16_entry,
3474 /* Put in the GOT offset for the lhi instruction. */
3475 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3476 plt->contents + iplt_offset + 2);
3478 /* Adjust the jump to the first plt entry. */
3479 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3480 plt->contents + iplt_offset + 20);
3484 memcpy (plt->contents + iplt_offset,
3485 elf_s390_plt_pic_entry,
3488 /* Adjust the jump to the first plt entry. */
3489 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3490 plt->contents + iplt_offset + 20);
3492 /* Push the GOT offset field. */
3493 bfd_put_32 (output_bfd, got_offset,
3494 plt->contents + iplt_offset + 24);
3496 /* Insert offset into reloc. table here. */
3497 bfd_put_32 (output_bfd, relplt->output_offset +
3498 iplt_index * RELA_ENTRY_SIZE,
3499 plt->contents + iplt_offset + 28);
3501 /* Fill in the entry in the global offset table.
3502 Points to instruction after GOT offset. */
3503 bfd_put_32 (output_bfd,
3504 (plt->output_section->vma
3505 + plt->output_offset
3508 gotplt->contents + igotiplt_offset);
3510 /* Fill in the entry in the .rela.plt section. */
3511 rela.r_offset = gotplt->output_section->vma + got_offset;
3515 || ((bfd_link_executable (info)
3516 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3519 /* The symbol can be locally resolved. */
3520 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3521 rela.r_addend = resolver_address;
3525 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3529 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3530 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3533 /* Finish up dynamic symbol handling. We set the contents of various
3534 dynamic sections here. */
3537 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3538 struct bfd_link_info *info,
3539 struct elf_link_hash_entry *h,
3540 Elf_Internal_Sym *sym)
3542 struct elf_s390_link_hash_table *htab;
3543 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3545 htab = elf_s390_hash_table (info);
3547 if (h->plt.offset != (bfd_vma) -1)
3551 Elf_Internal_Rela rela;
3553 bfd_vma relative_offset;
3555 /* This symbol has an entry in the procedure linkage table. Set
3557 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3559 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3560 htab, h->plt.offset,
3561 eh->ifunc_resolver_address +
3562 eh->ifunc_resolver_section->output_offset +
3563 eh->ifunc_resolver_section->output_section->vma);
3564 /* Do not return yet. Handling of explicit GOT slots of
3565 IFUNC symbols is below. */
3569 if (h->dynindx == -1
3570 || htab->elf.splt == NULL
3571 || htab->elf.sgotplt == NULL
3572 || htab->elf.srelplt == NULL)
3576 Current offset - size first entry / entry size. */
3577 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3579 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3581 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3583 /* S390 uses halfwords for relative branch calc! */
3584 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3585 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3586 /* If offset is > 32768, branch to a previous branch
3587 390 can only handle +-64 K jumps. */
3588 if ( -32768 > (int) relative_offset )
3590 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3592 /* Fill in the entry in the procedure linkage table. */
3593 if (!bfd_link_pic (info))
3595 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3598 /* Adjust jump to the first plt entry. */
3599 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3600 htab->elf.splt->contents + h->plt.offset + 20);
3602 /* Push the GOT offset field. */
3603 bfd_put_32 (output_bfd,
3604 (htab->elf.sgotplt->output_section->vma
3605 + htab->elf.sgotplt->output_offset
3607 htab->elf.splt->contents + h->plt.offset + 24);
3609 else if (got_offset < 4096)
3611 /* The GOT offset is small enough to be used directly as
3613 memcpy (htab->elf.splt->contents + h->plt.offset,
3614 elf_s390_plt_pic12_entry,
3617 /* Put in the GOT offset as displacement value. The 0xc000
3618 value comes from the first word of the plt entry. Look
3619 at the elf_s390_plt_pic16_entry content. */
3620 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3621 htab->elf.splt->contents + h->plt.offset + 2);
3623 /* Adjust the jump to the first plt entry. */
3624 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3625 htab->elf.splt->contents + h->plt.offset + 20);
3627 else if (got_offset < 32768)
3629 /* The GOT offset is too big for a displacement but small
3630 enough to be a signed 16 bit immediate value as it can be
3631 used in an lhi instruction. */
3632 memcpy (htab->elf.splt->contents + h->plt.offset,
3633 elf_s390_plt_pic16_entry,
3636 /* Put in the GOT offset for the lhi instruction. */
3637 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3638 htab->elf.splt->contents + h->plt.offset + 2);
3640 /* Adjust the jump to the first plt entry. */
3641 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3642 htab->elf.splt->contents + h->plt.offset + 20);
3646 memcpy (htab->elf.splt->contents + h->plt.offset,
3647 elf_s390_plt_pic_entry,
3650 /* Adjust the jump to the first plt entry. */
3651 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3652 htab->elf.splt->contents + h->plt.offset + 20);
3654 /* Push the GOT offset field. */
3655 bfd_put_32 (output_bfd, got_offset,
3656 htab->elf.splt->contents + h->plt.offset + 24);
3658 /* Insert offset into reloc. table here. */
3659 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3660 htab->elf.splt->contents + h->plt.offset + 28);
3662 /* Fill in the entry in the global offset table.
3663 Points to instruction after GOT offset. */
3664 bfd_put_32 (output_bfd,
3665 (htab->elf.splt->output_section->vma
3666 + htab->elf.splt->output_offset
3669 htab->elf.sgotplt->contents + got_offset);
3671 /* Fill in the entry in the .rela.plt section. */
3672 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3673 + htab->elf.sgotplt->output_offset
3675 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3677 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3678 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3680 if (!h->def_regular)
3682 /* Mark the symbol as undefined, rather than as defined in
3683 the .plt section. Leave the value alone. This is a clue
3684 for the dynamic linker, to make function pointer
3685 comparisons work between an application and shared
3687 sym->st_shndx = SHN_UNDEF;
3692 if (h->got.offset != (bfd_vma) -1
3693 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3694 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3695 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3697 Elf_Internal_Rela rela;
3700 /* This symbol has an entry in the global offset table. Set it
3703 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3706 rela.r_offset = (htab->elf.sgot->output_section->vma
3707 + htab->elf.sgot->output_offset
3708 + (h->got.offset &~ (bfd_vma) 1));
3710 /* If this is a static link, or it is a -Bsymbolic link and the
3711 symbol is defined locally or was forced to be local because
3712 of a version file, we just want to emit a RELATIVE reloc.
3713 The entry in the global offset table will already have been
3714 initialized in the relocate_section function. */
3715 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3717 if (bfd_link_pic (info))
3719 /* An explicit GOT slot usage needs GLOB_DAT. If the
3720 symbol references local the implicit got.iplt slot
3721 will be used and the IRELATIVE reloc has been created
3727 /* For non-shared objects explicit GOT slots must be
3728 filled with the PLT slot address for pointer
3729 equality reasons. */
3730 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3731 + htab->elf.iplt->output_offset
3733 htab->elf.sgot->contents + h->got.offset);
3737 else if (bfd_link_pic (info)
3738 && SYMBOL_REFERENCES_LOCAL (info, h))
3740 /* If this is a static link, or it is a -Bsymbolic link and
3741 the symbol is defined locally or was forced to be local
3742 because of a version file, we just want to emit a
3743 RELATIVE reloc. The entry in the global offset table
3744 will already have been initialized in the
3745 relocate_section function. */
3746 if (!h->def_regular)
3748 BFD_ASSERT((h->got.offset & 1) != 0);
3749 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3750 rela.r_addend = (h->root.u.def.value
3751 + h->root.u.def.section->output_section->vma
3752 + h->root.u.def.section->output_offset);
3756 BFD_ASSERT((h->got.offset & 1) == 0);
3758 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3759 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3763 loc = htab->elf.srelgot->contents;
3764 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3765 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3770 Elf_Internal_Rela rela;
3773 /* This symbols needs a copy reloc. Set it up. */
3775 if (h->dynindx == -1
3776 || (h->root.type != bfd_link_hash_defined
3777 && h->root.type != bfd_link_hash_defweak)
3778 || htab->srelbss == NULL)
3781 rela.r_offset = (h->root.u.def.value
3782 + h->root.u.def.section->output_section->vma
3783 + h->root.u.def.section->output_offset);
3784 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3786 loc = htab->srelbss->contents;
3787 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3788 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3791 /* Mark some specially defined symbols as absolute. */
3792 if (h == htab->elf.hdynamic
3793 || h == htab->elf.hgot
3794 || h == htab->elf.hplt)
3795 sym->st_shndx = SHN_ABS;
3800 /* Used to decide how to sort relocs in an optimal manner for the
3801 dynamic linker, before writing them out. */
3803 static enum elf_reloc_type_class
3804 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3805 const asection *rel_sec ATTRIBUTE_UNUSED,
3806 const Elf_Internal_Rela *rela)
3808 switch ((int) ELF32_R_TYPE (rela->r_info))
3810 case R_390_RELATIVE:
3811 return reloc_class_relative;
3812 case R_390_JMP_SLOT:
3813 return reloc_class_plt;
3815 return reloc_class_copy;
3817 return reloc_class_normal;
3821 /* Finish up the dynamic sections. */
3824 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3825 struct bfd_link_info *info)
3827 struct elf_s390_link_hash_table *htab;
3833 htab = elf_s390_hash_table (info);
3834 dynobj = htab->elf.dynobj;
3835 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3837 if (htab->elf.dynamic_sections_created)
3839 Elf32_External_Dyn *dyncon, *dynconend;
3841 if (sdyn == NULL || htab->elf.sgot == NULL)
3844 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3845 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3846 for (; dyncon < dynconend; dyncon++)
3848 Elf_Internal_Dyn dyn;
3851 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3859 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3863 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3867 s = htab->elf.srelplt->output_section;
3868 dyn.d_un.d_val = s->size;
3872 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3875 /* Fill in the special first entry in the procedure linkage table. */
3876 if (htab->elf.splt && htab->elf.splt->size > 0)
3878 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3879 if (bfd_link_pic (info))
3881 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3882 PLT_FIRST_ENTRY_SIZE);
3886 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3887 PLT_FIRST_ENTRY_SIZE);
3888 bfd_put_32 (output_bfd,
3889 htab->elf.sgotplt->output_section->vma
3890 + htab->elf.sgotplt->output_offset,
3891 htab->elf.splt->contents + 24);
3893 elf_section_data (htab->elf.splt->output_section)
3894 ->this_hdr.sh_entsize = 4;
3899 if (htab->elf.sgotplt)
3901 /* Fill in the first three entries in the global offset table. */
3902 if (htab->elf.sgotplt->size > 0)
3904 bfd_put_32 (output_bfd,
3905 (sdyn == NULL ? (bfd_vma) 0
3906 : sdyn->output_section->vma + sdyn->output_offset),
3907 htab->elf.sgotplt->contents);
3908 /* One entry for shared object struct ptr. */
3909 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3910 /* One entry for _dl_runtime_resolve. */
3911 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3914 elf_section_data (htab->elf.sgotplt->output_section)
3915 ->this_hdr.sh_entsize = 4;
3917 /* Finish dynamic symbol for local IFUNC symbols. */
3918 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3920 struct plt_entry *local_plt;
3921 Elf_Internal_Sym *isym;
3922 Elf_Internal_Shdr *symtab_hdr;
3924 symtab_hdr = &elf_symtab_hdr (ibfd);
3926 local_plt = elf_s390_local_plt (ibfd);
3927 if (local_plt != NULL)
3928 for (i = 0; i < symtab_hdr->sh_info; i++)
3930 if (local_plt[i].plt.offset != (bfd_vma) -1)
3932 asection *sec = local_plt[i].sec;
3933 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3937 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3938 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3939 local_plt[i].plt.offset,
3941 + sec->output_section->vma
3942 + sec->output_offset);
3951 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3956 switch (note->descsz)
3961 case 224: /* S/390 Linux. */
3963 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3966 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3974 /* Make a ".reg/999" section. */
3975 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3976 size, note->descpos + offset);
3979 /* Return address for Ith PLT stub in section PLT, for relocation REL
3980 or (bfd_vma) -1 if it should not be included. */
3983 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3984 const arelent *rel ATTRIBUTE_UNUSED)
3986 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3989 /* Merge backend specific data from an object file to the output
3990 object file when linking. */
3993 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3995 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3998 if (!elf_s390_merge_obj_attributes (ibfd, obfd))
4001 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4006 #define TARGET_BIG_SYM s390_elf32_vec
4007 #define TARGET_BIG_NAME "elf32-s390"
4008 #define ELF_ARCH bfd_arch_s390
4009 #define ELF_TARGET_ID S390_ELF_DATA
4010 #define ELF_MACHINE_CODE EM_S390
4011 #define ELF_MACHINE_ALT1 EM_S390_OLD
4012 #define ELF_MAXPAGESIZE 0x1000
4014 #define elf_backend_can_gc_sections 1
4015 #define elf_backend_can_refcount 1
4016 #define elf_backend_want_got_plt 1
4017 #define elf_backend_plt_readonly 1
4018 #define elf_backend_want_plt_sym 0
4019 #define elf_backend_got_header_size 12
4020 #define elf_backend_rela_normal 1
4022 #define elf_info_to_howto elf_s390_info_to_howto
4024 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4025 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4026 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4027 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4029 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4031 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4032 #define elf_backend_check_relocs elf_s390_check_relocs
4033 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4034 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4035 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4036 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4037 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4038 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4039 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4040 #define elf_backend_relocate_section elf_s390_relocate_section
4041 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4042 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4043 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4044 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4045 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4046 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4048 #define bfd_elf32_mkobject elf_s390_mkobject
4049 #define elf_backend_object_p elf_s390_object_p
4051 #include "elf32-target.h"