1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2014 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 0, /* 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");
860 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
862 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
863 || (!info->shared && !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,
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 (info->relocatable)
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:
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:
1255 info->flags |= DF_STATIC_TLS;
1269 /* If this reloc is in a read-only section, we might
1270 need a copy reloc. We can't check reliably at this
1271 stage whether the section is read-only, as input
1272 sections have not yet been mapped to output sections.
1273 Tentatively set the flag for now, and correct in
1274 adjust_dynamic_symbol. */
1279 /* We may need a .plt entry if the function this reloc
1280 refers to is in a shared lib. */
1281 h->plt.refcount += 1;
1285 /* If we are creating a shared library, and this is a reloc
1286 against a global symbol, or a non PC relative reloc
1287 against a local symbol, then we need to copy the reloc
1288 into the shared library. However, if we are linking with
1289 -Bsymbolic, we do not need to copy a reloc against a
1290 global symbol which is defined in an object we are
1291 including in the link (i.e., DEF_REGULAR is set). At
1292 this point we have not seen all the input files, so it is
1293 possible that DEF_REGULAR is not set now but will be set
1294 later (it is never cleared). In case of a weak definition,
1295 DEF_REGULAR may be cleared later by a strong definition in
1296 a shared library. We account for that possibility below by
1297 storing information in the relocs_copied field of the hash
1298 table entry. A similar situation occurs when creating
1299 shared libraries and symbol visibility changes render the
1302 If on the other hand, we are creating an executable, we
1303 may need to keep relocations for symbols satisfied by a
1304 dynamic library if we manage to avoid copy relocs for the
1307 && (sec->flags & SEC_ALLOC) != 0
1308 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1309 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1310 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1311 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1312 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1313 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1315 && (! SYMBOLIC_BIND (info, h)
1316 || h->root.type == bfd_link_hash_defweak
1317 || !h->def_regular))))
1318 || (ELIMINATE_COPY_RELOCS
1320 && (sec->flags & SEC_ALLOC) != 0
1322 && (h->root.type == bfd_link_hash_defweak
1323 || !h->def_regular)))
1325 struct elf_dyn_relocs *p;
1326 struct elf_dyn_relocs **head;
1328 /* We must copy these reloc types into the output file.
1329 Create a reloc section in dynobj and make room for
1333 if (htab->elf.dynobj == NULL)
1334 htab->elf.dynobj = abfd;
1336 sreloc = _bfd_elf_make_dynamic_reloc_section
1337 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1343 /* If this is a global symbol, we count the number of
1344 relocations we need for this symbol. */
1347 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1351 /* Track dynamic relocs needed for local syms too.
1352 We really need local syms available to do this
1357 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1362 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1366 vpp = &elf_section_data (s)->local_dynrel;
1367 head = (struct elf_dyn_relocs **) vpp;
1371 if (p == NULL || p->sec != sec)
1373 bfd_size_type amt = sizeof *p;
1375 p = ((struct elf_dyn_relocs *)
1376 bfd_alloc (htab->elf.dynobj, amt));
1387 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1388 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1389 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1390 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1391 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1392 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1397 /* This relocation describes the C++ object vtable hierarchy.
1398 Reconstruct it for later use during GC. */
1399 case R_390_GNU_VTINHERIT:
1400 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1404 /* This relocation describes which C++ vtable entries are actually
1405 used. Record for later use during GC. */
1406 case R_390_GNU_VTENTRY:
1407 BFD_ASSERT (h != NULL);
1409 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1421 /* Return the section that should be marked against GC for a given
1425 elf_s390_gc_mark_hook (asection *sec,
1426 struct bfd_link_info *info,
1427 Elf_Internal_Rela *rel,
1428 struct elf_link_hash_entry *h,
1429 Elf_Internal_Sym *sym)
1432 switch (ELF32_R_TYPE (rel->r_info))
1434 case R_390_GNU_VTINHERIT:
1435 case R_390_GNU_VTENTRY:
1438 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1442 /* Update the got entry reference counts for the section being removed. */
1445 elf_s390_gc_sweep_hook (bfd *abfd,
1446 struct bfd_link_info *info,
1448 const Elf_Internal_Rela *relocs)
1450 struct elf_s390_link_hash_table *htab;
1451 Elf_Internal_Shdr *symtab_hdr;
1452 struct elf_link_hash_entry **sym_hashes;
1453 bfd_signed_vma *local_got_refcounts;
1454 const Elf_Internal_Rela *rel, *relend;
1456 if (info->relocatable)
1459 htab = elf_s390_hash_table (info);
1463 elf_section_data (sec)->local_dynrel = NULL;
1465 symtab_hdr = &elf_symtab_hdr (abfd);
1466 sym_hashes = elf_sym_hashes (abfd);
1467 local_got_refcounts = elf_local_got_refcounts (abfd);
1469 relend = relocs + sec->reloc_count;
1470 for (rel = relocs; rel < relend; rel++)
1472 unsigned long r_symndx;
1473 unsigned int r_type;
1474 struct elf_link_hash_entry *h = NULL;
1476 r_symndx = ELF32_R_SYM (rel->r_info);
1477 if (r_symndx >= symtab_hdr->sh_info)
1479 struct elf_s390_link_hash_entry *eh;
1480 struct elf_dyn_relocs **pp;
1481 struct elf_dyn_relocs *p;
1483 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1484 while (h->root.type == bfd_link_hash_indirect
1485 || h->root.type == bfd_link_hash_warning)
1486 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1487 eh = (struct elf_s390_link_hash_entry *) h;
1489 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1492 /* Everything must go for SEC. */
1499 Elf_Internal_Sym *isym;
1501 /* A local symbol. */
1502 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1507 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1509 struct plt_entry *plt = elf_s390_local_plt (abfd);
1510 if (plt[r_symndx].plt.refcount > 0)
1511 plt[r_symndx].plt.refcount--;
1515 r_type = ELF32_R_TYPE (rel->r_info);
1516 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1519 case R_390_TLS_LDM32:
1520 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1521 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1524 case R_390_TLS_GD32:
1525 case R_390_TLS_IE32:
1526 case R_390_TLS_GOTIE12:
1527 case R_390_TLS_GOTIE20:
1528 case R_390_TLS_GOTIE32:
1529 case R_390_TLS_IEENT:
1534 case R_390_GOTOFF16:
1535 case R_390_GOTOFF32:
1537 case R_390_GOTPCDBL:
1541 if (h->got.refcount > 0)
1542 h->got.refcount -= 1;
1544 else if (local_got_refcounts != NULL)
1546 if (local_got_refcounts[r_symndx] > 0)
1547 local_got_refcounts[r_symndx] -= 1;
1566 case R_390_PLT12DBL:
1567 case R_390_PLT16DBL:
1568 case R_390_PLT24DBL:
1569 case R_390_PLT32DBL:
1571 case R_390_PLTOFF16:
1572 case R_390_PLTOFF32:
1575 if (h->plt.refcount > 0)
1576 h->plt.refcount -= 1;
1580 case R_390_GOTPLT12:
1581 case R_390_GOTPLT16:
1582 case R_390_GOTPLT20:
1583 case R_390_GOTPLT32:
1584 case R_390_GOTPLTENT:
1587 if (h->plt.refcount > 0)
1589 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1590 h->plt.refcount -= 1;
1593 else if (local_got_refcounts != NULL)
1595 if (local_got_refcounts[r_symndx] > 0)
1596 local_got_refcounts[r_symndx] -= 1;
1608 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1609 entry but we found we will not create any. Called when we find we will
1610 not have any PLT for this symbol, by for example
1611 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1612 or elf_s390_size_dynamic_sections if no dynamic sections will be
1613 created (we're only linking static objects). */
1616 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1618 if (h->elf.root.type == bfd_link_hash_warning)
1619 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1621 if (h->gotplt_refcount <= 0)
1624 /* We simply add the number of gotplt references to the number
1625 * of got references for this symbol. */
1626 h->elf.got.refcount += h->gotplt_refcount;
1627 h->gotplt_refcount = -1;
1630 /* Adjust a symbol defined by a dynamic object and referenced by a
1631 regular object. The current definition is in some section of the
1632 dynamic object, but we're not including those sections. We have to
1633 change the definition to something the rest of the link can
1637 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1638 struct elf_link_hash_entry *h)
1640 struct elf_s390_link_hash_table *htab;
1643 /* STT_GNU_IFUNC symbol must go through PLT. */
1644 if (s390_is_ifunc_symbol_p (h))
1647 /* If this is a function, put it in the procedure linkage table. We
1648 will fill in the contents of the procedure linkage table later
1649 (although we could actually do it here). */
1650 if (h->type == STT_FUNC
1653 if (h->plt.refcount <= 0
1654 || SYMBOL_CALLS_LOCAL (info, h)
1655 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1656 && h->root.type != bfd_link_hash_undefweak))
1658 /* This case can occur if we saw a PLT32 reloc in an input
1659 file, but the symbol was never referred to by a dynamic
1660 object, or if all references were garbage collected. In
1661 such a case, we don't actually need to build a procedure
1662 linkage table, and we can just do a PC32 reloc instead. */
1663 h->plt.offset = (bfd_vma) -1;
1665 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1671 /* It's possible that we incorrectly decided a .plt reloc was
1672 needed for an R_390_PC32 reloc to a non-function sym in
1673 check_relocs. We can't decide accurately between function and
1674 non-function syms in check-relocs; Objects loaded later in
1675 the link may change h->type. So fix it now. */
1676 h->plt.offset = (bfd_vma) -1;
1678 /* If this is a weak symbol, and there is a real definition, the
1679 processor independent code will have arranged for us to see the
1680 real definition first, and we can just use the same value. */
1681 if (h->u.weakdef != NULL)
1683 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1684 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1685 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1686 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1687 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1688 h->non_got_ref = h->u.weakdef->non_got_ref;
1692 /* This is a reference to a symbol defined by a dynamic object which
1693 is not a function. */
1695 /* If we are creating a shared library, we must presume that the
1696 only references to the symbol are via the global offset table.
1697 For such cases we need not do anything here; the relocations will
1698 be handled correctly by relocate_section. */
1702 /* If there are no references to this symbol that do not use the
1703 GOT, we don't need to generate a copy reloc. */
1704 if (!h->non_got_ref)
1707 /* If -z nocopyreloc was given, we won't generate them either. */
1708 if (info->nocopyreloc)
1714 if (ELIMINATE_COPY_RELOCS)
1716 struct elf_s390_link_hash_entry * eh;
1717 struct elf_dyn_relocs *p;
1719 eh = (struct elf_s390_link_hash_entry *) h;
1720 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1722 s = p->sec->output_section;
1723 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1727 /* If we didn't find any dynamic relocs in read-only sections, then
1728 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1736 /* We must allocate the symbol in our .dynbss section, which will
1737 become part of the .bss section of the executable. There will be
1738 an entry for this symbol in the .dynsym section. The dynamic
1739 object will contain position independent code, so all references
1740 from the dynamic object to this symbol will go through the global
1741 offset table. The dynamic linker will use the .dynsym entry to
1742 determine the address it must put in the global offset table, so
1743 both the dynamic object and the regular object will refer to the
1744 same memory location for the variable. */
1746 htab = elf_s390_hash_table (info);
1748 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1749 copy the initial value out of the dynamic object and into the
1750 runtime process image. */
1751 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1753 htab->srelbss->size += sizeof (Elf32_External_Rela);
1759 return _bfd_elf_adjust_dynamic_copy (h, s);
1762 /* Allocate space in .plt, .got and associated reloc sections for
1766 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1768 struct bfd_link_info *info;
1769 struct elf_s390_link_hash_table *htab;
1770 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1771 struct elf_dyn_relocs *p;
1773 if (h->root.type == bfd_link_hash_indirect)
1776 info = (struct bfd_link_info *) inf;
1777 htab = elf_s390_hash_table (info);
1779 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1780 here if it is defined and referenced in a non-shared object. */
1781 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1782 return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1784 else if (htab->elf.dynamic_sections_created
1785 && h->plt.refcount > 0)
1787 /* Make sure this symbol is output as a dynamic symbol.
1788 Undefined weak syms won't yet be marked as dynamic. */
1789 if (h->dynindx == -1
1790 && !h->forced_local)
1792 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1797 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1799 asection *s = htab->elf.splt;
1801 /* If this is the first .plt entry, make room for the special
1804 s->size += PLT_FIRST_ENTRY_SIZE;
1806 h->plt.offset = s->size;
1808 /* If this symbol is not defined in a regular file, and we are
1809 not generating a shared library, then set the symbol to this
1810 location in the .plt. This is required to make function
1811 pointers compare as equal between the normal executable and
1812 the shared library. */
1816 h->root.u.def.section = s;
1817 h->root.u.def.value = h->plt.offset;
1820 /* Make room for this entry. */
1821 s->size += PLT_ENTRY_SIZE;
1823 /* We also need to make an entry in the .got.plt section, which
1824 will be placed in the .got section by the linker script. */
1825 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1827 /* We also need to make an entry in the .rela.plt section. */
1828 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1832 h->plt.offset = (bfd_vma) -1;
1834 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1839 h->plt.offset = (bfd_vma) -1;
1841 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1844 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1845 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1846 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1847 we can save the dynamic TLS relocation. */
1848 if (h->got.refcount > 0
1851 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1853 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1854 /* For the GOTIE access without a literal pool entry the offset has
1855 to be stored somewhere. The immediate value in the instruction
1856 is not bit enough so the value is stored in the got. */
1858 h->got.offset = htab->elf.sgot->size;
1859 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1862 h->got.offset = (bfd_vma) -1;
1864 else if (h->got.refcount > 0)
1868 int tls_type = elf_s390_hash_entry(h)->tls_type;
1870 /* Make sure this symbol is output as a dynamic symbol.
1871 Undefined weak syms won't yet be marked as dynamic. */
1872 if (h->dynindx == -1
1873 && !h->forced_local)
1875 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1880 h->got.offset = s->size;
1881 s->size += GOT_ENTRY_SIZE;
1882 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1883 if (tls_type == GOT_TLS_GD)
1884 s->size += GOT_ENTRY_SIZE;
1885 dyn = htab->elf.dynamic_sections_created;
1886 /* R_390_TLS_IE32 needs one dynamic relocation,
1887 R_390_TLS_GD32 needs one if local symbol and two if global. */
1888 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1889 || tls_type >= GOT_TLS_IE)
1890 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1891 else if (tls_type == GOT_TLS_GD)
1892 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1893 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1894 || h->root.type != bfd_link_hash_undefweak)
1896 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1897 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1900 h->got.offset = (bfd_vma) -1;
1902 if (eh->dyn_relocs == NULL)
1905 /* In the shared -Bsymbolic case, discard space allocated for
1906 dynamic pc-relative relocs against symbols which turn out to be
1907 defined in regular objects. For the normal shared case, discard
1908 space for pc-relative relocs that have become local due to symbol
1909 visibility changes. */
1913 if (SYMBOL_CALLS_LOCAL (info, h))
1915 struct elf_dyn_relocs **pp;
1917 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1919 p->count -= p->pc_count;
1928 /* Also discard relocs on undefined weak syms with non-default
1930 if (eh->dyn_relocs != NULL
1931 && h->root.type == bfd_link_hash_undefweak)
1933 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1934 eh->dyn_relocs = NULL;
1936 /* Make sure undefined weak symbols are output as a dynamic
1938 else if (h->dynindx == -1
1939 && !h->forced_local)
1941 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1946 else if (ELIMINATE_COPY_RELOCS)
1948 /* For the non-shared case, discard space for relocs against
1949 symbols which turn out to need copy relocs or are not
1955 || (htab->elf.dynamic_sections_created
1956 && (h->root.type == bfd_link_hash_undefweak
1957 || h->root.type == bfd_link_hash_undefined))))
1959 /* Make sure this symbol is output as a dynamic symbol.
1960 Undefined weak syms won't yet be marked as dynamic. */
1961 if (h->dynindx == -1
1962 && !h->forced_local)
1964 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1968 /* If that succeeded, we know we'll be keeping all the
1970 if (h->dynindx != -1)
1974 eh->dyn_relocs = NULL;
1979 /* Finally, allocate space. */
1980 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1982 asection *sreloc = elf_section_data (p->sec)->sreloc;
1984 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1990 /* Find any dynamic relocs that apply to read-only sections. */
1993 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1995 struct elf_s390_link_hash_entry *eh;
1996 struct elf_dyn_relocs *p;
1998 eh = (struct elf_s390_link_hash_entry *) h;
1999 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2001 asection *s = p->sec->output_section;
2003 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2005 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2007 info->flags |= DF_TEXTREL;
2009 /* Not an error, just cut short the traversal. */
2016 /* Set the sizes of the dynamic sections. */
2019 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2020 struct bfd_link_info *info)
2022 struct elf_s390_link_hash_table *htab;
2028 htab = elf_s390_hash_table (info);
2029 dynobj = htab->elf.dynobj;
2033 if (htab->elf.dynamic_sections_created)
2035 /* Set the contents of the .interp section to the interpreter. */
2036 if (info->executable)
2038 s = bfd_get_linker_section (dynobj, ".interp");
2041 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2042 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2046 /* Set up .got offsets for local syms, and space for local dynamic
2048 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2050 bfd_signed_vma *local_got;
2051 bfd_signed_vma *end_local_got;
2052 char *local_tls_type;
2053 bfd_size_type locsymcount;
2054 Elf_Internal_Shdr *symtab_hdr;
2056 struct plt_entry *local_plt;
2059 if (! is_s390_elf (ibfd))
2062 for (s = ibfd->sections; s != NULL; s = s->next)
2064 struct elf_dyn_relocs *p;
2066 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2068 if (!bfd_is_abs_section (p->sec)
2069 && bfd_is_abs_section (p->sec->output_section))
2071 /* Input section has been discarded, either because
2072 it is a copy of a linkonce section or due to
2073 linker script /DISCARD/, so we'll be discarding
2076 else if (p->count != 0)
2078 srela = elf_section_data (p->sec)->sreloc;
2079 srela->size += p->count * sizeof (Elf32_External_Rela);
2080 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2081 info->flags |= DF_TEXTREL;
2086 local_got = elf_local_got_refcounts (ibfd);
2090 symtab_hdr = &elf_symtab_hdr (ibfd);
2091 locsymcount = symtab_hdr->sh_info;
2092 end_local_got = local_got + locsymcount;
2093 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2095 srela = htab->elf.srelgot;
2096 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2100 *local_got = s->size;
2101 s->size += GOT_ENTRY_SIZE;
2102 if (*local_tls_type == GOT_TLS_GD)
2103 s->size += GOT_ENTRY_SIZE;
2105 srela->size += sizeof (Elf32_External_Rela);
2108 *local_got = (bfd_vma) -1;
2110 local_plt = elf_s390_local_plt (ibfd);
2111 for (i = 0; i < symtab_hdr->sh_info; i++)
2113 if (local_plt[i].plt.refcount > 0)
2115 local_plt[i].plt.offset = htab->elf.iplt->size;
2116 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2117 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2118 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2121 local_plt[i].plt.offset = (bfd_vma) -1;
2125 if (htab->tls_ldm_got.refcount > 0)
2127 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2129 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2130 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2131 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2134 htab->tls_ldm_got.offset = -1;
2136 /* Allocate global sym .plt and .got entries, and space for global
2137 sym dynamic relocs. */
2138 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2140 /* We now have determined the sizes of the various dynamic sections.
2141 Allocate memory for them. */
2143 for (s = dynobj->sections; s != NULL; s = s->next)
2145 if ((s->flags & SEC_LINKER_CREATED) == 0)
2148 if (s == htab->elf.splt
2149 || s == htab->elf.sgot
2150 || s == htab->elf.sgotplt
2151 || s == htab->sdynbss
2152 || s == htab->elf.iplt
2153 || s == htab->elf.igotplt
2154 || s == htab->irelifunc)
2156 /* Strip this section if we don't need it; see the
2159 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2164 /* We use the reloc_count field as a counter if we need
2165 to copy relocs into the output file. */
2170 /* It's not one of our sections, so don't allocate space. */
2176 /* If we don't need this section, strip it from the
2177 output file. This is to handle .rela.bss and
2178 .rela.plt. We must create it in
2179 create_dynamic_sections, because it must be created
2180 before the linker maps input sections to output
2181 sections. The linker does that before
2182 adjust_dynamic_symbol is called, and it is that
2183 function which decides whether anything needs to go
2184 into these sections. */
2186 s->flags |= SEC_EXCLUDE;
2190 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2193 /* Allocate memory for the section contents. We use bfd_zalloc
2194 here in case unused entries are not reclaimed before the
2195 section's contents are written out. This should not happen,
2196 but this way if it does, we get a R_390_NONE reloc instead
2198 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2199 if (s->contents == NULL)
2203 if (htab->elf.dynamic_sections_created)
2205 /* Add some entries to the .dynamic section. We fill in the
2206 values later, in elf_s390_finish_dynamic_sections, but we
2207 must add the entries now so that we get the correct size for
2208 the .dynamic section. The DT_DEBUG entry is filled in by the
2209 dynamic linker and used by the debugger. */
2210 #define add_dynamic_entry(TAG, VAL) \
2211 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2213 if (info->executable)
2215 if (!add_dynamic_entry (DT_DEBUG, 0))
2219 if (htab->elf.splt->size != 0)
2221 if (!add_dynamic_entry (DT_PLTGOT, 0)
2222 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2223 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2224 || !add_dynamic_entry (DT_JMPREL, 0))
2230 if (!add_dynamic_entry (DT_RELA, 0)
2231 || !add_dynamic_entry (DT_RELASZ, 0)
2232 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2235 /* If any dynamic relocs apply to a read-only section,
2236 then we need a DT_TEXTREL entry. */
2237 if ((info->flags & DF_TEXTREL) == 0)
2238 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2240 if ((info->flags & DF_TEXTREL) != 0)
2242 if (!add_dynamic_entry (DT_TEXTREL, 0))
2247 #undef add_dynamic_entry
2252 /* Return the base VMA address which should be subtracted from real addresses
2253 when resolving @dtpoff relocation.
2254 This is PT_TLS segment p_vaddr. */
2257 dtpoff_base (struct bfd_link_info *info)
2259 /* If tls_sec is NULL, we should have signalled an error already. */
2260 if (elf_hash_table (info)->tls_sec == NULL)
2262 return elf_hash_table (info)->tls_sec->vma;
2265 /* Return the relocation value for @tpoff relocation
2266 if STT_TLS virtual address is ADDRESS. */
2269 tpoff (struct bfd_link_info *info, bfd_vma address)
2271 struct elf_link_hash_table *htab = elf_hash_table (info);
2273 /* If tls_sec is NULL, we should have signalled an error already. */
2274 if (htab->tls_sec == NULL)
2276 return htab->tls_size + htab->tls_sec->vma - address;
2279 /* Complain if TLS instruction relocation is against an invalid
2283 invalid_tls_insn (bfd *input_bfd,
2284 asection *input_section,
2285 Elf_Internal_Rela *rel)
2287 reloc_howto_type *howto;
2289 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2290 (*_bfd_error_handler)
2291 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2294 (long) rel->r_offset,
2296 bfd_set_error (bfd_error_bad_value);
2299 /* Relocate a 390 ELF section. */
2302 elf_s390_relocate_section (bfd *output_bfd,
2303 struct bfd_link_info *info,
2305 asection *input_section,
2307 Elf_Internal_Rela *relocs,
2308 Elf_Internal_Sym *local_syms,
2309 asection **local_sections)
2311 struct elf_s390_link_hash_table *htab;
2312 Elf_Internal_Shdr *symtab_hdr;
2313 struct elf_link_hash_entry **sym_hashes;
2314 bfd_vma *local_got_offsets;
2315 Elf_Internal_Rela *rel;
2316 Elf_Internal_Rela *relend;
2318 BFD_ASSERT (is_s390_elf (input_bfd));
2320 htab = elf_s390_hash_table (info);
2321 symtab_hdr = &elf_symtab_hdr (input_bfd);
2322 sym_hashes = elf_sym_hashes (input_bfd);
2323 local_got_offsets = elf_local_got_offsets (input_bfd);
2326 relend = relocs + input_section->reloc_count;
2327 for (; rel < relend; rel++)
2329 unsigned int r_type;
2330 reloc_howto_type *howto;
2331 unsigned long r_symndx;
2332 struct elf_link_hash_entry *h;
2333 Elf_Internal_Sym *sym;
2337 bfd_boolean unresolved_reloc;
2338 bfd_reloc_status_type r;
2340 asection *base_got = htab->elf.sgot;
2342 r_type = ELF32_R_TYPE (rel->r_info);
2343 if (r_type == (int) R_390_GNU_VTINHERIT
2344 || r_type == (int) R_390_GNU_VTENTRY)
2346 if (r_type >= (int) R_390_max)
2348 bfd_set_error (bfd_error_bad_value);
2352 howto = elf_howto_table + r_type;
2353 r_symndx = ELF32_R_SYM (rel->r_info);
2358 unresolved_reloc = FALSE;
2359 if (r_symndx < symtab_hdr->sh_info)
2361 sym = local_syms + r_symndx;
2362 sec = local_sections[r_symndx];
2363 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2365 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2366 if (local_plt == NULL)
2369 /* Address of the PLT slot. */
2370 relocation = (htab->elf.iplt->output_section->vma
2371 + htab->elf.iplt->output_offset
2372 + local_plt[r_symndx].plt.offset);
2376 case R_390_PLTOFF16:
2377 case R_390_PLTOFF32:
2378 relocation -= htab->elf.sgot->output_section->vma;
2380 case R_390_GOTPLT12:
2381 case R_390_GOTPLT16:
2382 case R_390_GOTPLT20:
2383 case R_390_GOTPLT32:
2384 case R_390_GOTPLTENT:
2391 /* Write the PLT slot address into the GOT slot. */
2392 bfd_put_32 (output_bfd, relocation,
2393 htab->elf.sgot->contents +
2394 local_got_offsets[r_symndx]);
2395 relocation = (local_got_offsets[r_symndx] +
2396 htab->elf.sgot->output_offset);
2398 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2399 relocation += htab->elf.sgot->output_section->vma;
2405 /* The output section is needed later in
2406 finish_dynamic_section when creating the dynamic
2408 local_plt[r_symndx].sec = sec;
2412 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2416 bfd_boolean warned ATTRIBUTE_UNUSED;
2417 bfd_boolean ignored ATTRIBUTE_UNUSED;
2419 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2420 r_symndx, symtab_hdr, sym_hashes,
2422 unresolved_reloc, warned, ignored);
2425 if (sec != NULL && discarded_section (sec))
2426 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2427 rel, 1, relend, howto, 0, contents);
2429 if (info->relocatable)
2434 case R_390_GOTPLT12:
2435 case R_390_GOTPLT16:
2436 case R_390_GOTPLT20:
2437 case R_390_GOTPLT32:
2438 case R_390_GOTPLTENT:
2439 /* There are three cases for a GOTPLT relocation. 1) The
2440 relocation is against the jump slot entry of a plt that
2441 will get emitted to the output file. 2) The relocation
2442 is against the jump slot of a plt entry that has been
2443 removed. elf_s390_adjust_gotplt has created a GOT entry
2444 as replacement. 3) The relocation is against a local symbol.
2445 Cases 2) and 3) are the same as the GOT relocation code
2446 so we just have to test for case 1 and fall through for
2448 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2452 if (s390_is_ifunc_symbol_p (h))
2454 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2455 relocation = (plt_index * GOT_ENTRY_SIZE +
2456 htab->elf.igotplt->output_offset);
2457 if (r_type == R_390_GOTPLTENT)
2458 relocation += htab->elf.igotplt->output_section->vma;
2463 Current offset - size first entry / entry size. */
2464 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2467 /* Offset in GOT is PLT index plus GOT headers(3)
2468 times 4, addr & GOT addr. */
2469 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2470 if (r_type == R_390_GOTPLTENT)
2471 relocation += htab->elf.sgot->output_section->vma;
2473 unresolved_reloc = FALSE;
2483 /* Relocation is to the entry for this symbol in the global
2485 if (base_got == NULL)
2492 off = h->got.offset;
2493 dyn = htab->elf.dynamic_sections_created;
2495 if (s390_is_ifunc_symbol_p (h))
2497 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2498 if (off == (bfd_vma)-1)
2500 /* No explicit GOT usage so redirect to the
2502 base_got = htab->elf.igotplt;
2503 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2507 /* Explicit GOT slots must contain the address
2508 of the PLT slot. This will be handled in
2509 finish_dynamic_symbol. */
2512 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2514 && SYMBOL_REFERENCES_LOCAL (info, h))
2515 || (ELF_ST_VISIBILITY (h->other)
2516 && h->root.type == bfd_link_hash_undefweak))
2519 /* This is actually a static link, or it is a
2520 -Bsymbolic link and the symbol is defined
2521 locally, or the symbol was forced to be local
2522 because of a version file. We must initialize
2523 this entry in the global offset table. Since the
2524 offset must always be a multiple of 2, we use the
2525 least significant bit to record whether we have
2526 initialized it already.
2528 When doing a dynamic link, we create a .rel.got
2529 relocation entry to initialize the value. This
2530 is done in the finish_dynamic_symbol routine. */
2535 bfd_put_32 (output_bfd, relocation,
2536 base_got->contents + off);
2542 && SYMBOL_REFERENCES_LOCAL (info, h))
2543 /* lrl rx,sym@GOTENT -> larl rx, sym */
2544 && ((r_type == R_390_GOTENT
2545 && (bfd_get_16 (input_bfd,
2546 contents + rel->r_offset - 2)
2547 & 0xff0f) == 0xc40d)
2548 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2549 || (r_type == R_390_GOT20
2550 && (bfd_get_32 (input_bfd,
2551 contents + rel->r_offset - 2)
2552 & 0xff00f000) == 0xe300c000
2553 && bfd_get_8 (input_bfd,
2554 contents + rel->r_offset + 3) == 0x58)))
2556 unsigned short new_insn =
2557 (0xc000 | (bfd_get_8 (input_bfd,
2558 contents + rel->r_offset - 1) & 0xf0));
2559 bfd_put_16 (output_bfd, new_insn,
2560 contents + rel->r_offset - 2);
2561 r_type = R_390_PC32DBL;
2563 howto = elf_howto_table + r_type;
2564 relocation = h->root.u.def.value
2565 + h->root.u.def.section->output_section->vma
2566 + h->root.u.def.section->output_offset;
2571 unresolved_reloc = FALSE;
2575 if (local_got_offsets == NULL)
2578 off = local_got_offsets[r_symndx];
2580 /* The offset must always be a multiple of 4. We use
2581 the least significant bit to record whether we have
2582 already generated the necessary reloc. */
2587 bfd_put_32 (output_bfd, relocation,
2588 htab->elf.sgot->contents + off);
2593 Elf_Internal_Rela outrel;
2596 srelgot = htab->elf.srelgot;
2597 if (srelgot == NULL)
2600 outrel.r_offset = (htab->elf.sgot->output_section->vma
2601 + htab->elf.sgot->output_offset
2603 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2604 outrel.r_addend = relocation;
2605 loc = srelgot->contents;
2606 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2607 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2610 local_got_offsets[r_symndx] |= 1;
2614 if (off >= (bfd_vma) -2)
2617 relocation = base_got->output_offset + off;
2619 /* For @GOTENT the relocation is against the offset between
2620 the instruction and the symbols entry in the GOT and not
2621 between the start of the GOT and the symbols entry. We
2622 add the vma of the GOT to get the correct value. */
2623 if ( r_type == R_390_GOTENT
2624 || r_type == R_390_GOTPLTENT)
2625 relocation += base_got->output_section->vma;
2629 case R_390_GOTOFF16:
2630 case R_390_GOTOFF32:
2631 /* Relocation is relative to the start of the global offset
2634 /* Note that sgot->output_offset is not involved in this
2635 calculation. We always want the start of .got. If we
2636 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2637 permitted by the ABI, we might have to change this
2639 relocation -= htab->elf.sgot->output_section->vma;
2643 case R_390_GOTPCDBL:
2644 /* Use global offset table as symbol value. */
2645 relocation = htab->elf.sgot->output_section->vma;
2646 unresolved_reloc = FALSE;
2649 case R_390_PLT12DBL:
2650 case R_390_PLT16DBL:
2651 case R_390_PLT24DBL:
2652 case R_390_PLT32DBL:
2654 /* Relocation is to the entry for this symbol in the
2655 procedure linkage table. */
2657 /* Resolve a PLT32 reloc against a local symbol directly,
2658 without using the procedure linkage table. */
2662 if (h->plt.offset == (bfd_vma) -1
2663 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2665 /* We didn't make a PLT entry for this symbol. This
2666 happens when statically linking PIC code, or when
2667 using -Bsymbolic. */
2671 if (s390_is_ifunc_symbol_p (h))
2672 relocation = (htab->elf.iplt->output_section->vma
2673 + htab->elf.iplt->output_offset
2676 relocation = (htab->elf.splt->output_section->vma
2677 + htab->elf.splt->output_offset
2679 unresolved_reloc = FALSE;
2682 case R_390_PLTOFF16:
2683 case R_390_PLTOFF32:
2684 /* Relocation is to the entry for this symbol in the
2685 procedure linkage table relative to the start of the GOT. */
2687 /* For local symbols or if we didn't make a PLT entry for
2688 this symbol resolve the symbol directly. */
2690 || h->plt.offset == (bfd_vma) -1
2691 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2693 relocation -= htab->elf.sgot->output_section->vma;
2697 if (s390_is_ifunc_symbol_p (h))
2698 relocation = (htab->elf.iplt->output_section->vma
2699 + htab->elf.iplt->output_offset
2701 - htab->elf.sgot->output_section->vma);
2703 relocation = (htab->elf.splt->output_section->vma
2704 + htab->elf.splt->output_offset
2706 - htab->elf.sgot->output_section->vma);
2707 unresolved_reloc = FALSE;
2720 && s390_is_ifunc_symbol_p (h)
2723 if (!info->shared || !h->non_got_ref)
2725 /* For a non-shared object STT_GNU_IFUNC symbol must
2727 relocation = (htab->elf.iplt->output_section->vma
2728 + htab->elf.iplt->output_offset
2734 /* For shared objects a runtime relocation is needed. */
2736 Elf_Internal_Rela outrel;
2739 /* Need a dynamic relocation to get the real function
2741 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2745 if (outrel.r_offset == (bfd_vma) -1
2746 || outrel.r_offset == (bfd_vma) -2)
2749 outrel.r_offset += (input_section->output_section->vma
2750 + input_section->output_offset);
2752 if (h->dynindx == -1
2754 || info->executable)
2756 /* This symbol is resolved locally. */
2757 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2758 outrel.r_addend = (h->root.u.def.value
2759 + h->root.u.def.section->output_section->vma
2760 + h->root.u.def.section->output_offset);
2764 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2765 outrel.r_addend = 0;
2768 sreloc = htab->elf.irelifunc;
2769 elf_append_rela (output_bfd, sreloc, &outrel);
2771 /* If this reloc is against an external symbol, we
2772 do not want to fiddle with the addend. Otherwise,
2773 we need to include the symbol value so that it
2774 becomes an addend for the dynamic reloc. For an
2775 internal symbol, we have updated addend. */
2780 if ((input_section->flags & SEC_ALLOC) == 0)
2785 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2786 || h->root.type != bfd_link_hash_undefweak)
2787 && ((r_type != R_390_PC16
2788 && r_type != R_390_PC12DBL
2789 && r_type != R_390_PC16DBL
2790 && r_type != R_390_PC24DBL
2791 && r_type != R_390_PC32DBL
2792 && r_type != R_390_PC32)
2793 || !SYMBOL_CALLS_LOCAL (info, h)))
2794 || (ELIMINATE_COPY_RELOCS
2801 || h->root.type == bfd_link_hash_undefweak
2802 || h->root.type == bfd_link_hash_undefined)))
2804 Elf_Internal_Rela outrel;
2805 bfd_boolean skip, relocate;
2809 /* When generating a shared object, these relocations
2810 are copied into the output file to be resolved at run
2817 _bfd_elf_section_offset (output_bfd, info, input_section,
2819 if (outrel.r_offset == (bfd_vma) -1)
2821 else if (outrel.r_offset == (bfd_vma) -2)
2822 skip = TRUE, relocate = TRUE;
2823 outrel.r_offset += (input_section->output_section->vma
2824 + input_section->output_offset);
2827 memset (&outrel, 0, sizeof outrel);
2830 && (r_type == R_390_PC16
2831 || r_type == R_390_PC12DBL
2832 || r_type == R_390_PC16DBL
2833 || r_type == R_390_PC24DBL
2834 || r_type == R_390_PC32DBL
2835 || r_type == R_390_PC32
2837 || !SYMBOLIC_BIND (info, h)
2838 || !h->def_regular))
2840 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2841 outrel.r_addend = rel->r_addend;
2845 /* This symbol is local, or marked to become local. */
2846 outrel.r_addend = relocation + rel->r_addend;
2847 if (r_type == R_390_32)
2850 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2856 if (bfd_is_abs_section (sec))
2858 else if (sec == NULL || sec->owner == NULL)
2860 bfd_set_error(bfd_error_bad_value);
2867 osec = sec->output_section;
2868 sindx = elf_section_data (osec)->dynindx;
2871 osec = htab->elf.text_index_section;
2872 sindx = elf_section_data (osec)->dynindx;
2874 BFD_ASSERT (sindx != 0);
2876 /* We are turning this relocation into one
2877 against a section symbol, so subtract out
2878 the output section's address but not the
2879 offset of the input section in the output
2881 outrel.r_addend -= osec->vma;
2883 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2887 sreloc = elf_section_data (input_section)->sreloc;
2891 loc = sreloc->contents;
2892 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2893 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2895 /* If this reloc is against an external symbol, we do
2896 not want to fiddle with the addend. Otherwise, we
2897 need to include the symbol value so that it becomes
2898 an addend for the dynamic reloc. */
2904 /* Relocations for tls literal pool entries. */
2905 case R_390_TLS_IE32:
2908 Elf_Internal_Rela outrel;
2912 outrel.r_offset = rel->r_offset
2913 + input_section->output_section->vma
2914 + input_section->output_offset;
2915 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2916 sreloc = elf_section_data (input_section)->sreloc;
2919 loc = sreloc->contents;
2920 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2921 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2925 case R_390_TLS_GD32:
2926 case R_390_TLS_GOTIE32:
2927 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2928 tls_type = GOT_UNKNOWN;
2929 if (h == NULL && local_got_offsets)
2930 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2933 tls_type = elf_s390_hash_entry(h)->tls_type;
2934 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2935 r_type = R_390_TLS_LE32;
2937 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2938 r_type = R_390_TLS_IE32;
2940 if (r_type == R_390_TLS_LE32)
2942 /* This relocation gets optimized away by the local exec
2943 access optimization. */
2944 BFD_ASSERT (! unresolved_reloc);
2945 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2946 contents + rel->r_offset);
2950 if (htab->elf.sgot == NULL)
2954 off = h->got.offset;
2957 if (local_got_offsets == NULL)
2960 off = local_got_offsets[r_symndx];
2969 Elf_Internal_Rela outrel;
2973 if (htab->elf.srelgot == NULL)
2976 outrel.r_offset = (htab->elf.sgot->output_section->vma
2977 + htab->elf.sgot->output_offset + off);
2979 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2980 if (r_type == R_390_TLS_GD32)
2981 dr_type = R_390_TLS_DTPMOD;
2983 dr_type = R_390_TLS_TPOFF;
2984 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2985 outrel.r_addend = relocation - dtpoff_base (info);
2987 outrel.r_addend = 0;
2988 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2989 loc = htab->elf.srelgot->contents;
2990 loc += htab->elf.srelgot->reloc_count++
2991 * sizeof (Elf32_External_Rela);
2992 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2994 if (r_type == R_390_TLS_GD32)
2998 BFD_ASSERT (! unresolved_reloc);
2999 bfd_put_32 (output_bfd,
3000 relocation - dtpoff_base (info),
3001 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3005 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3006 outrel.r_offset += GOT_ENTRY_SIZE;
3007 outrel.r_addend = 0;
3008 htab->elf.srelgot->reloc_count++;
3009 loc += sizeof (Elf32_External_Rela);
3010 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3017 local_got_offsets[r_symndx] |= 1;
3020 if (off >= (bfd_vma) -2)
3022 if (r_type == ELF32_R_TYPE (rel->r_info))
3024 relocation = htab->elf.sgot->output_offset + off;
3025 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3026 relocation += htab->elf.sgot->output_section->vma;
3027 unresolved_reloc = FALSE;
3031 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3032 contents + rel->r_offset);
3037 case R_390_TLS_GOTIE12:
3038 case R_390_TLS_GOTIE20:
3039 case R_390_TLS_IEENT:
3042 if (local_got_offsets == NULL)
3044 off = local_got_offsets[r_symndx];
3046 goto emit_tls_relocs;
3050 off = h->got.offset;
3051 tls_type = elf_s390_hash_entry(h)->tls_type;
3052 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3053 goto emit_tls_relocs;
3056 if (htab->elf.sgot == NULL)
3059 BFD_ASSERT (! unresolved_reloc);
3060 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3061 htab->elf.sgot->contents + off);
3062 relocation = htab->elf.sgot->output_offset + off;
3063 if (r_type == R_390_TLS_IEENT)
3064 relocation += htab->elf.sgot->output_section->vma;
3065 unresolved_reloc = FALSE;
3068 case R_390_TLS_LDM32:
3070 /* The literal pool entry this relocation refers to gets ignored
3071 by the optimized code of the local exec model. Do nothing
3072 and the value will turn out zero. */
3075 if (htab->elf.sgot == NULL)
3078 off = htab->tls_ldm_got.offset;
3083 Elf_Internal_Rela outrel;
3086 if (htab->elf.srelgot == NULL)
3089 outrel.r_offset = (htab->elf.sgot->output_section->vma
3090 + htab->elf.sgot->output_offset + off);
3092 bfd_put_32 (output_bfd, 0,
3093 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3094 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3095 outrel.r_addend = 0;
3096 loc = htab->elf.srelgot->contents;
3097 loc += htab->elf.srelgot->reloc_count++
3098 * sizeof (Elf32_External_Rela);
3099 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3100 htab->tls_ldm_got.offset |= 1;
3102 relocation = htab->elf.sgot->output_offset + off;
3103 unresolved_reloc = FALSE;
3106 case R_390_TLS_LE32:
3109 /* Linking a shared library with non-fpic code requires
3110 a R_390_TLS_TPOFF relocation. */
3111 Elf_Internal_Rela outrel;
3116 outrel.r_offset = rel->r_offset
3117 + input_section->output_section->vma
3118 + input_section->output_offset;
3119 if (h != NULL && h->dynindx != -1)
3123 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3125 outrel.r_addend = relocation - dtpoff_base (info);
3127 outrel.r_addend = 0;
3128 sreloc = elf_section_data (input_section)->sreloc;
3131 loc = sreloc->contents;
3132 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3133 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3137 BFD_ASSERT (! unresolved_reloc);
3138 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3139 contents + rel->r_offset);
3143 case R_390_TLS_LDO32:
3144 if (info->shared || (input_section->flags & SEC_DEBUGGING))
3145 relocation -= dtpoff_base (info);
3147 /* When converting LDO to LE, we must negate. */
3148 relocation = -tpoff (info, relocation);
3151 /* Relocations for tls instructions. */
3152 case R_390_TLS_LOAD:
3153 case R_390_TLS_GDCALL:
3154 case R_390_TLS_LDCALL:
3155 tls_type = GOT_UNKNOWN;
3156 if (h == NULL && local_got_offsets)
3157 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3159 tls_type = elf_s390_hash_entry(h)->tls_type;
3161 if (tls_type == GOT_TLS_GD)
3164 if (r_type == R_390_TLS_LOAD)
3166 if (!info->shared && (h == NULL || h->dynindx == -1))
3168 /* IE->LE transition. Four valid cases:
3169 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3170 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3171 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3172 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3173 unsigned int insn, ry;
3175 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3177 if ((insn & 0xff00f000) == 0x58000000)
3178 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3179 ry = (insn & 0x000f0000);
3180 else if ((insn & 0xff0f0000) == 0x58000000)
3181 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3182 ry = (insn & 0x0000f000) << 4;
3183 else if ((insn & 0xff00f000) == 0x5800c000)
3184 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3185 ry = (insn & 0x000f0000);
3186 else if ((insn & 0xff0f0000) == 0x580c0000)
3187 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3188 ry = (insn & 0x0000f000) << 4;
3190 invalid_tls_insn (input_bfd, input_section, rel);
3191 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3192 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3195 else if (r_type == R_390_TLS_GDCALL)
3199 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3200 if ((insn & 0xff000fff) != 0x4d000000 &&
3201 (insn & 0xffff0000) != 0xc0e50000 &&
3202 (insn & 0xff000000) != 0x0d000000)
3203 invalid_tls_insn (input_bfd, input_section, rel);
3204 if (!info->shared && (h == NULL || h->dynindx == -1))
3206 if ((insn & 0xff000000) == 0x0d000000)
3208 /* GD->LE transition.
3209 basr rx, ry -> nopr r7 */
3210 insn = 0x07070000 | (insn & 0xffff);
3212 else if ((insn & 0xff000000) == 0x4d000000)
3214 /* GD->LE transition.
3215 bas %r14,0(%rx,%r13) -> bc 0,0 */
3220 /* GD->LE transition.
3221 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3223 bfd_put_16 (output_bfd, 0x0000,
3224 contents + rel->r_offset + 4);
3229 /* If basr is used in the pic case to invoke
3230 _tls_get_offset, something went wrong before. */
3231 if ((insn & 0xff000000) == 0x0d000000)
3232 invalid_tls_insn (input_bfd, input_section, rel);
3234 if ((insn & 0xff000000) == 0x4d000000)
3236 /* GD->IE transition.
3237 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3242 /* GD->IE transition.
3243 brasl %r14,__tls_get_addr@plt ->
3244 l %r2,0(%r2,%r12) ; bcr 0,0 */
3246 bfd_put_16 (output_bfd, 0x0700,
3247 contents + rel->r_offset + 4);
3250 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3252 else if (r_type == R_390_TLS_LDCALL)
3258 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3259 if ((insn & 0xff000fff) != 0x4d000000 &&
3260 (insn & 0xffff0000) != 0xc0e50000 &&
3261 (insn & 0xff000000) != 0x0d000000)
3262 invalid_tls_insn (input_bfd, input_section, rel);
3264 if ((insn & 0xff000000) == 0x0d000000)
3266 /* LD->LE transition.
3267 basr rx, ry -> nopr r7 */
3268 insn = 0x07070000 | (insn & 0xffff);
3270 else if ((insn & 0xff000000) == 0x4d000000)
3272 /* LD->LE transition.
3273 bas %r14,0(%rx,%r13) -> bc 0,0 */
3278 /* LD->LE transition.
3279 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3281 bfd_put_16 (output_bfd, 0x0000,
3282 contents + rel->r_offset + 4);
3284 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3293 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3294 because such sections are not SEC_ALLOC and thus ld.so will
3295 not process them. */
3296 if (unresolved_reloc
3297 && !((input_section->flags & SEC_DEBUGGING) != 0
3299 && _bfd_elf_section_offset (output_bfd, info, input_section,
3300 rel->r_offset) != (bfd_vma) -1)
3301 (*_bfd_error_handler)
3302 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3305 (long) rel->r_offset,
3307 h->root.root.string);
3311 /* When applying a 24 bit reloc we need to start one byte
3312 earlier. Otherwise the 32 bit get/put bfd operations might
3313 access a byte after the actual section. */
3314 if (r_type == R_390_PC24DBL
3315 || r_type == R_390_PLT24DBL)
3318 if (r_type == R_390_20
3319 || r_type == R_390_GOT20
3320 || r_type == R_390_GOTPLT20
3321 || r_type == R_390_TLS_GOTIE20)
3323 relocation += rel->r_addend;
3324 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3325 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3326 contents, rel->r_offset,
3330 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3331 contents, rel->r_offset,
3332 relocation, rel->r_addend);
3334 if (r != bfd_reloc_ok)
3339 name = h->root.root.string;
3342 name = bfd_elf_string_from_elf_section (input_bfd,
3343 symtab_hdr->sh_link,
3348 name = bfd_section_name (input_bfd, sec);
3351 if (r == bfd_reloc_overflow)
3354 if (! ((*info->callbacks->reloc_overflow)
3355 (info, (h ? &h->root : NULL), name, howto->name,
3356 (bfd_vma) 0, input_bfd, input_section,
3362 (*_bfd_error_handler)
3363 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3364 input_bfd, input_section,
3365 (long) rel->r_offset, name, (int) r);
3374 /* Generate the PLT slots together with the dynamic relocations needed
3375 for IFUNC symbols. */
3378 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3379 struct bfd_link_info *info,
3380 struct elf_link_hash_entry *h,
3381 struct elf_s390_link_hash_table *htab,
3382 bfd_vma iplt_offset,
3383 bfd_vma resolver_address)
3387 bfd_vma igotiplt_offset;
3388 Elf_Internal_Rela rela;
3390 asection *plt, *gotplt, *relplt;
3391 bfd_vma relative_offset;
3393 if (htab->elf.iplt == NULL
3394 || htab->elf.igotplt == NULL
3395 || htab->elf.irelplt == NULL)
3398 gotplt = htab->elf.igotplt;
3399 relplt = htab->elf.irelplt;
3401 /* Index of the PLT slot within iplt section. */
3402 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3403 plt = htab->elf.iplt;
3404 /* Offset into the igot.plt section. */
3405 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3406 /* Offset into the got section. */
3407 got_offset = igotiplt_offset + gotplt->output_offset;
3409 /* S390 uses halfwords for relative branch calc! */
3410 relative_offset = - (plt->output_offset +
3411 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3412 /* If offset is > 32768, branch to a previous branch
3413 390 can only handle +-64 K jumps. */
3414 if ( -32768 > (int) relative_offset )
3416 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3418 /* Fill in the entry in the procedure linkage table. */
3421 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3424 /* Adjust jump to the first plt entry. */
3425 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3426 plt->contents + iplt_offset + 20);
3428 /* Push the GOT offset field. */
3429 bfd_put_32 (output_bfd,
3430 (gotplt->output_section->vma
3432 plt->contents + iplt_offset + 24);
3434 else if (got_offset < 4096)
3436 /* The GOT offset is small enough to be used directly as
3438 memcpy (plt->contents + iplt_offset,
3439 elf_s390_plt_pic12_entry,
3442 /* Put in the GOT offset as displacement value. The 0xc000
3443 value comes from the first word of the plt entry. Look
3444 at the elf_s390_plt_pic16_entry content. */
3445 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3446 plt->contents + iplt_offset + 2);
3448 /* Adjust the jump to the first plt entry. */
3449 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3450 plt->contents + iplt_offset + 20);
3452 else if (got_offset < 32768)
3454 /* The GOT offset is too big for a displacement but small
3455 enough to be a signed 16 bit immediate value as it can be
3456 used in an lhi instruction. */
3457 memcpy (plt->contents + iplt_offset,
3458 elf_s390_plt_pic16_entry,
3461 /* Put in the GOT offset for the lhi instruction. */
3462 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3463 plt->contents + iplt_offset + 2);
3465 /* Adjust the jump to the first plt entry. */
3466 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3467 plt->contents + iplt_offset + 20);
3471 memcpy (plt->contents + iplt_offset,
3472 elf_s390_plt_pic_entry,
3475 /* Adjust the jump to the first plt entry. */
3476 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3477 plt->contents + iplt_offset + 20);
3479 /* Push the GOT offset field. */
3480 bfd_put_32 (output_bfd, got_offset,
3481 plt->contents + iplt_offset + 24);
3483 /* Insert offset into reloc. table here. */
3484 bfd_put_32 (output_bfd, relplt->output_offset +
3485 iplt_index * RELA_ENTRY_SIZE,
3486 plt->contents + iplt_offset + 28);
3488 /* Fill in the entry in the global offset table.
3489 Points to instruction after GOT offset. */
3490 bfd_put_32 (output_bfd,
3491 (plt->output_section->vma
3492 + plt->output_offset
3495 gotplt->contents + igotiplt_offset);
3497 /* Fill in the entry in the .rela.plt section. */
3498 rela.r_offset = gotplt->output_section->vma + got_offset;
3502 || ((info->executable
3503 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3506 /* The symbol can be locally resolved. */
3507 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3508 rela.r_addend = resolver_address;
3512 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3516 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3517 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3520 /* Finish up dynamic symbol handling. We set the contents of various
3521 dynamic sections here. */
3524 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3525 struct bfd_link_info *info,
3526 struct elf_link_hash_entry *h,
3527 Elf_Internal_Sym *sym)
3529 struct elf_s390_link_hash_table *htab;
3530 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3532 htab = elf_s390_hash_table (info);
3534 if (h->plt.offset != (bfd_vma) -1)
3538 Elf_Internal_Rela rela;
3540 bfd_vma relative_offset;
3542 /* This symbol has an entry in the procedure linkage table. Set
3544 if (s390_is_ifunc_symbol_p (h))
3546 /* If we can resolve the IFUNC symbol locally we generate an
3548 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3549 eh->ifunc_resolver_address +
3550 eh->ifunc_resolver_section->output_offset +
3551 eh->ifunc_resolver_section->output_section->vma);
3552 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3553 symbols is below. */
3557 if (h->dynindx == -1
3558 || htab->elf.splt == NULL
3559 || htab->elf.sgotplt == NULL
3560 || htab->elf.srelplt == NULL)
3564 Current offset - size first entry / entry size. */
3565 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3567 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3569 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3571 /* S390 uses halfwords for relative branch calc! */
3572 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3573 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3574 /* If offset is > 32768, branch to a previous branch
3575 390 can only handle +-64 K jumps. */
3576 if ( -32768 > (int) relative_offset )
3578 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3580 /* Fill in the entry in the procedure linkage table. */
3583 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3586 /* Adjust jump to the first plt entry. */
3587 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3588 htab->elf.splt->contents + h->plt.offset + 20);
3590 /* Push the GOT offset field. */
3591 bfd_put_32 (output_bfd,
3592 (htab->elf.sgotplt->output_section->vma
3593 + htab->elf.sgotplt->output_offset
3595 htab->elf.splt->contents + h->plt.offset + 24);
3597 else if (got_offset < 4096)
3599 /* The GOT offset is small enough to be used directly as
3601 memcpy (htab->elf.splt->contents + h->plt.offset,
3602 elf_s390_plt_pic12_entry,
3605 /* Put in the GOT offset as displacement value. The 0xc000
3606 value comes from the first word of the plt entry. Look
3607 at the elf_s390_plt_pic16_entry content. */
3608 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3609 htab->elf.splt->contents + h->plt.offset + 2);
3611 /* Adjust the jump to the first plt entry. */
3612 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3613 htab->elf.splt->contents + h->plt.offset + 20);
3615 else if (got_offset < 32768)
3617 /* The GOT offset is too big for a displacement but small
3618 enough to be a signed 16 bit immediate value as it can be
3619 used in an lhi instruction. */
3620 memcpy (htab->elf.splt->contents + h->plt.offset,
3621 elf_s390_plt_pic16_entry,
3624 /* Put in the GOT offset for the lhi instruction. */
3625 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3626 htab->elf.splt->contents + h->plt.offset + 2);
3628 /* Adjust the jump to the first plt entry. */
3629 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3630 htab->elf.splt->contents + h->plt.offset + 20);
3634 memcpy (htab->elf.splt->contents + h->plt.offset,
3635 elf_s390_plt_pic_entry,
3638 /* Adjust the jump to the first plt entry. */
3639 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3640 htab->elf.splt->contents + h->plt.offset + 20);
3642 /* Push the GOT offset field. */
3643 bfd_put_32 (output_bfd, got_offset,
3644 htab->elf.splt->contents + h->plt.offset + 24);
3646 /* Insert offset into reloc. table here. */
3647 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3648 htab->elf.splt->contents + h->plt.offset + 28);
3650 /* Fill in the entry in the global offset table.
3651 Points to instruction after GOT offset. */
3652 bfd_put_32 (output_bfd,
3653 (htab->elf.splt->output_section->vma
3654 + htab->elf.splt->output_offset
3657 htab->elf.sgotplt->contents + got_offset);
3659 /* Fill in the entry in the .rela.plt section. */
3660 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3661 + htab->elf.sgotplt->output_offset
3663 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3665 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3666 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3668 if (!h->def_regular)
3670 /* Mark the symbol as undefined, rather than as defined in
3671 the .plt section. Leave the value alone. This is a clue
3672 for the dynamic linker, to make function pointer
3673 comparisons work between an application and shared
3675 sym->st_shndx = SHN_UNDEF;
3680 if (h->got.offset != (bfd_vma) -1
3681 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3682 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3683 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3685 Elf_Internal_Rela rela;
3688 /* This symbol has an entry in the global offset table. Set it
3691 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3694 rela.r_offset = (htab->elf.sgot->output_section->vma
3695 + htab->elf.sgot->output_offset
3696 + (h->got.offset &~ (bfd_vma) 1));
3698 /* If this is a static link, or it is a -Bsymbolic link and the
3699 symbol is defined locally or was forced to be local because
3700 of a version file, we just want to emit a RELATIVE reloc.
3701 The entry in the global offset table will already have been
3702 initialized in the relocate_section function. */
3703 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3707 /* An explicit GOT slot usage needs GLOB_DAT. If the
3708 symbol references local the implicit got.iplt slot
3709 will be used and the IRELATIVE reloc has been created
3715 /* For non-shared objects explicit GOT slots must be
3716 filled with the PLT slot address for pointer
3717 equality reasons. */
3718 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3719 + htab->elf.iplt->output_offset
3721 htab->elf.sgot->contents + h->got.offset);
3725 else if (info->shared
3726 && SYMBOL_REFERENCES_LOCAL (info, h))
3728 /* If this is a static link, or it is a -Bsymbolic link and
3729 the symbol is defined locally or was forced to be local
3730 because of a version file, we just want to emit a
3731 RELATIVE reloc. The entry in the global offset table
3732 will already have been initialized in the
3733 relocate_section function. */
3734 if (!h->def_regular)
3736 BFD_ASSERT((h->got.offset & 1) != 0);
3737 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3738 rela.r_addend = (h->root.u.def.value
3739 + h->root.u.def.section->output_section->vma
3740 + h->root.u.def.section->output_offset);
3744 BFD_ASSERT((h->got.offset & 1) == 0);
3746 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3747 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3751 loc = htab->elf.srelgot->contents;
3752 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3753 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3758 Elf_Internal_Rela rela;
3761 /* This symbols needs a copy reloc. Set it up. */
3763 if (h->dynindx == -1
3764 || (h->root.type != bfd_link_hash_defined
3765 && h->root.type != bfd_link_hash_defweak)
3766 || htab->srelbss == NULL)
3769 rela.r_offset = (h->root.u.def.value
3770 + h->root.u.def.section->output_section->vma
3771 + h->root.u.def.section->output_offset);
3772 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3774 loc = htab->srelbss->contents;
3775 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3776 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3779 /* Mark some specially defined symbols as absolute. */
3780 if (h == htab->elf.hdynamic
3781 || h == htab->elf.hgot
3782 || h == htab->elf.hplt)
3783 sym->st_shndx = SHN_ABS;
3788 /* Used to decide how to sort relocs in an optimal manner for the
3789 dynamic linker, before writing them out. */
3791 static enum elf_reloc_type_class
3792 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3793 const asection *rel_sec ATTRIBUTE_UNUSED,
3794 const Elf_Internal_Rela *rela)
3796 switch ((int) ELF32_R_TYPE (rela->r_info))
3798 case R_390_RELATIVE:
3799 return reloc_class_relative;
3800 case R_390_JMP_SLOT:
3801 return reloc_class_plt;
3803 return reloc_class_copy;
3805 return reloc_class_normal;
3809 /* Finish up the dynamic sections. */
3812 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3813 struct bfd_link_info *info)
3815 struct elf_s390_link_hash_table *htab;
3821 htab = elf_s390_hash_table (info);
3822 dynobj = htab->elf.dynobj;
3823 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3825 if (htab->elf.dynamic_sections_created)
3827 Elf32_External_Dyn *dyncon, *dynconend;
3829 if (sdyn == NULL || htab->elf.sgot == NULL)
3832 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3833 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3834 for (; dyncon < dynconend; dyncon++)
3836 Elf_Internal_Dyn dyn;
3839 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3847 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3851 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3855 s = htab->elf.srelplt->output_section;
3856 dyn.d_un.d_val = s->size;
3860 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3863 /* Fill in the special first entry in the procedure linkage table. */
3864 if (htab->elf.splt && htab->elf.splt->size > 0)
3866 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3869 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3870 PLT_FIRST_ENTRY_SIZE);
3874 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3875 PLT_FIRST_ENTRY_SIZE);
3876 bfd_put_32 (output_bfd,
3877 htab->elf.sgotplt->output_section->vma
3878 + htab->elf.sgotplt->output_offset,
3879 htab->elf.splt->contents + 24);
3881 elf_section_data (htab->elf.splt->output_section)
3882 ->this_hdr.sh_entsize = 4;
3887 if (htab->elf.sgotplt)
3889 /* Fill in the first three entries in the global offset table. */
3890 if (htab->elf.sgotplt->size > 0)
3892 bfd_put_32 (output_bfd,
3893 (sdyn == NULL ? (bfd_vma) 0
3894 : sdyn->output_section->vma + sdyn->output_offset),
3895 htab->elf.sgotplt->contents);
3896 /* One entry for shared object struct ptr. */
3897 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3898 /* One entry for _dl_runtime_resolve. */
3899 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3902 elf_section_data (htab->elf.sgotplt->output_section)
3903 ->this_hdr.sh_entsize = 4;
3905 /* Finish dynamic symbol for local IFUNC symbols. */
3906 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3908 struct plt_entry *local_plt;
3909 Elf_Internal_Sym *isym;
3910 Elf_Internal_Shdr *symtab_hdr;
3912 symtab_hdr = &elf_symtab_hdr (ibfd);
3914 local_plt = elf_s390_local_plt (ibfd);
3915 if (local_plt != NULL)
3916 for (i = 0; i < symtab_hdr->sh_info; i++)
3918 if (local_plt[i].plt.offset != (bfd_vma) -1)
3920 asection *sec = local_plt[i].sec;
3921 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3925 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3926 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3927 local_plt[i].plt.offset,
3929 + sec->output_section->vma
3930 + sec->output_offset);
3939 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3944 switch (note->descsz)
3949 case 224: /* S/390 Linux. */
3951 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3954 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3962 /* Make a ".reg/999" section. */
3963 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3964 size, note->descpos + offset);
3967 /* Return address for Ith PLT stub in section PLT, for relocation REL
3968 or (bfd_vma) -1 if it should not be included. */
3971 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3972 const arelent *rel ATTRIBUTE_UNUSED)
3974 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3978 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3980 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3985 #define TARGET_BIG_SYM s390_elf32_vec
3986 #define TARGET_BIG_NAME "elf32-s390"
3987 #define ELF_ARCH bfd_arch_s390
3988 #define ELF_TARGET_ID S390_ELF_DATA
3989 #define ELF_MACHINE_CODE EM_S390
3990 #define ELF_MACHINE_ALT1 EM_S390_OLD
3991 #define ELF_MAXPAGESIZE 0x1000
3993 #define elf_backend_can_gc_sections 1
3994 #define elf_backend_can_refcount 1
3995 #define elf_backend_want_got_plt 1
3996 #define elf_backend_plt_readonly 1
3997 #define elf_backend_want_plt_sym 0
3998 #define elf_backend_got_header_size 12
3999 #define elf_backend_rela_normal 1
4001 #define elf_info_to_howto elf_s390_info_to_howto
4003 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4004 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4005 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4006 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4008 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4010 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4011 #define elf_backend_check_relocs elf_s390_check_relocs
4012 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4013 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4014 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4015 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4016 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4017 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4018 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4019 #define elf_backend_relocate_section elf_s390_relocate_section
4020 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4021 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4022 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4023 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4024 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4026 #define bfd_elf32_mkobject elf_s390_mkobject
4027 #define elf_backend_object_p elf_s390_object_p
4029 #include "elf32-target.h"