1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2019 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
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
37 /* The relocation "howto" table. */
39 static reloc_howto_type elf_howto_table[] =
41 HOWTO (R_390_NONE, /* type */
43 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
45 FALSE, /* pc_relative */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
53 FALSE), /* pcrel_offset */
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
174 /* GNU extension to record C++ vtable hierarchy. */
175 static reloc_howto_type elf32_s390_vtinherit_howto =
176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
177 static reloc_howto_type elf32_s390_vtentry_howto =
178 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);
180 static reloc_howto_type *
181 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182 bfd_reloc_code_real_type code)
187 return &elf_howto_table[(int) R_390_NONE];
189 return &elf_howto_table[(int) R_390_8];
190 case BFD_RELOC_390_12:
191 return &elf_howto_table[(int) R_390_12];
193 return &elf_howto_table[(int) R_390_16];
195 return &elf_howto_table[(int) R_390_32];
197 return &elf_howto_table[(int) R_390_32];
198 case BFD_RELOC_32_PCREL:
199 return &elf_howto_table[(int) R_390_PC32];
200 case BFD_RELOC_390_GOT12:
201 return &elf_howto_table[(int) R_390_GOT12];
202 case BFD_RELOC_32_GOT_PCREL:
203 return &elf_howto_table[(int) R_390_GOT32];
204 case BFD_RELOC_390_PLT32:
205 return &elf_howto_table[(int) R_390_PLT32];
206 case BFD_RELOC_390_COPY:
207 return &elf_howto_table[(int) R_390_COPY];
208 case BFD_RELOC_390_GLOB_DAT:
209 return &elf_howto_table[(int) R_390_GLOB_DAT];
210 case BFD_RELOC_390_JMP_SLOT:
211 return &elf_howto_table[(int) R_390_JMP_SLOT];
212 case BFD_RELOC_390_RELATIVE:
213 return &elf_howto_table[(int) R_390_RELATIVE];
214 case BFD_RELOC_32_GOTOFF:
215 return &elf_howto_table[(int) R_390_GOTOFF32];
216 case BFD_RELOC_390_GOTPC:
217 return &elf_howto_table[(int) R_390_GOTPC];
218 case BFD_RELOC_390_GOT16:
219 return &elf_howto_table[(int) R_390_GOT16];
220 case BFD_RELOC_16_PCREL:
221 return &elf_howto_table[(int) R_390_PC16];
222 case BFD_RELOC_390_PC12DBL:
223 return &elf_howto_table[(int) R_390_PC12DBL];
224 case BFD_RELOC_390_PLT12DBL:
225 return &elf_howto_table[(int) R_390_PLT12DBL];
226 case BFD_RELOC_390_PC16DBL:
227 return &elf_howto_table[(int) R_390_PC16DBL];
228 case BFD_RELOC_390_PLT16DBL:
229 return &elf_howto_table[(int) R_390_PLT16DBL];
230 case BFD_RELOC_390_PC24DBL:
231 return &elf_howto_table[(int) R_390_PC24DBL];
232 case BFD_RELOC_390_PLT24DBL:
233 return &elf_howto_table[(int) R_390_PLT24DBL];
234 case BFD_RELOC_390_PC32DBL:
235 return &elf_howto_table[(int) R_390_PC32DBL];
236 case BFD_RELOC_390_PLT32DBL:
237 return &elf_howto_table[(int) R_390_PLT32DBL];
238 case BFD_RELOC_390_GOTPCDBL:
239 return &elf_howto_table[(int) R_390_GOTPCDBL];
240 case BFD_RELOC_390_GOTENT:
241 return &elf_howto_table[(int) R_390_GOTENT];
242 case BFD_RELOC_16_GOTOFF:
243 return &elf_howto_table[(int) R_390_GOTOFF16];
244 case BFD_RELOC_390_GOTPLT12:
245 return &elf_howto_table[(int) R_390_GOTPLT12];
246 case BFD_RELOC_390_GOTPLT16:
247 return &elf_howto_table[(int) R_390_GOTPLT16];
248 case BFD_RELOC_390_GOTPLT32:
249 return &elf_howto_table[(int) R_390_GOTPLT32];
250 case BFD_RELOC_390_GOTPLTENT:
251 return &elf_howto_table[(int) R_390_GOTPLTENT];
252 case BFD_RELOC_390_PLTOFF16:
253 return &elf_howto_table[(int) R_390_PLTOFF16];
254 case BFD_RELOC_390_PLTOFF32:
255 return &elf_howto_table[(int) R_390_PLTOFF32];
256 case BFD_RELOC_390_TLS_LOAD:
257 return &elf_howto_table[(int) R_390_TLS_LOAD];
258 case BFD_RELOC_390_TLS_GDCALL:
259 return &elf_howto_table[(int) R_390_TLS_GDCALL];
260 case BFD_RELOC_390_TLS_LDCALL:
261 return &elf_howto_table[(int) R_390_TLS_LDCALL];
262 case BFD_RELOC_390_TLS_GD32:
263 return &elf_howto_table[(int) R_390_TLS_GD32];
264 case BFD_RELOC_390_TLS_GOTIE12:
265 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266 case BFD_RELOC_390_TLS_GOTIE32:
267 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268 case BFD_RELOC_390_TLS_LDM32:
269 return &elf_howto_table[(int) R_390_TLS_LDM32];
270 case BFD_RELOC_390_TLS_IE32:
271 return &elf_howto_table[(int) R_390_TLS_IE32];
272 case BFD_RELOC_390_TLS_IEENT:
273 return &elf_howto_table[(int) R_390_TLS_IEENT];
274 case BFD_RELOC_390_TLS_LE32:
275 return &elf_howto_table[(int) R_390_TLS_LE32];
276 case BFD_RELOC_390_TLS_LDO32:
277 return &elf_howto_table[(int) R_390_TLS_LDO32];
278 case BFD_RELOC_390_TLS_DTPMOD:
279 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280 case BFD_RELOC_390_TLS_DTPOFF:
281 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282 case BFD_RELOC_390_TLS_TPOFF:
283 return &elf_howto_table[(int) R_390_TLS_TPOFF];
284 case BFD_RELOC_390_20:
285 return &elf_howto_table[(int) R_390_20];
286 case BFD_RELOC_390_GOT20:
287 return &elf_howto_table[(int) R_390_GOT20];
288 case BFD_RELOC_390_GOTPLT20:
289 return &elf_howto_table[(int) R_390_GOTPLT20];
290 case BFD_RELOC_390_TLS_GOTIE20:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292 case BFD_RELOC_390_IRELATIVE:
293 return &elf_howto_table[(int) R_390_IRELATIVE];
294 case BFD_RELOC_VTABLE_INHERIT:
295 return &elf32_s390_vtinherit_howto;
296 case BFD_RELOC_VTABLE_ENTRY:
297 return &elf32_s390_vtentry_howto;
304 static reloc_howto_type *
305 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311 if (elf_howto_table[i].name != NULL
312 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313 return &elf_howto_table[i];
315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316 return &elf32_s390_vtinherit_howto;
317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318 return &elf32_s390_vtentry_howto;
323 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
324 and elf32-s390.c has its own copy. */
327 elf_s390_info_to_howto (bfd *abfd,
329 Elf_Internal_Rela *dst)
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
335 case R_390_GNU_VTINHERIT:
336 cache_ptr->howto = &elf32_s390_vtinherit_howto;
339 case R_390_GNU_VTENTRY:
340 cache_ptr->howto = &elf32_s390_vtentry_howto;
344 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
346 /* xgettext:c-format */
347 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
349 bfd_set_error (bfd_error_bad_value);
352 cache_ptr->howto = &elf_howto_table[r_type];
358 /* A relocation function which doesn't do anything. */
359 static bfd_reloc_status_type
360 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
361 arelent *reloc_entry,
362 asymbol *symbol ATTRIBUTE_UNUSED,
363 void * data ATTRIBUTE_UNUSED,
364 asection *input_section,
366 char **error_message ATTRIBUTE_UNUSED)
369 reloc_entry->address += input_section->output_offset;
373 /* Handle the large displacement relocs. */
374 static bfd_reloc_status_type
375 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
376 arelent *reloc_entry,
378 void * data ATTRIBUTE_UNUSED,
379 asection *input_section,
381 char **error_message ATTRIBUTE_UNUSED)
383 reloc_howto_type *howto = reloc_entry->howto;
387 if (output_bfd != (bfd *) NULL
388 && (symbol->flags & BSF_SECTION_SYM) == 0
389 && (! howto->partial_inplace
390 || reloc_entry->addend == 0))
392 reloc_entry->address += input_section->output_offset;
396 if (output_bfd != NULL)
397 return bfd_reloc_continue;
399 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
400 return bfd_reloc_outofrange;
402 relocation = (symbol->value
403 + symbol->section->output_section->vma
404 + symbol->section->output_offset);
405 relocation += reloc_entry->addend;
406 if (howto->pc_relative)
408 relocation -= (input_section->output_section->vma
409 + input_section->output_offset);
410 relocation -= reloc_entry->address;
413 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
414 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
415 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
417 if ((bfd_signed_vma) relocation < - 0x80000
418 || (bfd_signed_vma) relocation > 0x7ffff)
419 return bfd_reloc_overflow;
425 elf_s390_is_local_label_name (bfd *abfd, const char *name)
427 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
430 return _bfd_elf_is_local_label_name (abfd, name);
433 /* Functions for the 390 ELF linker. */
435 /* The name of the dynamic interpreter. This is put in the .interp
438 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
440 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
441 copying dynamic variables from a shared lib into an app's dynbss
442 section, and instead use a dynamic relocation to point into the
444 #define ELIMINATE_COPY_RELOCS 1
446 /* The size in bytes of the first entry in the procedure linkage table. */
447 #define PLT_FIRST_ENTRY_SIZE 32
448 /* The size in bytes of an entry in the procedure linkage table. */
449 #define PLT_ENTRY_SIZE 32
451 #define GOT_ENTRY_SIZE 4
453 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
455 /* The first three entries in a procedure linkage table are reserved,
456 and the initial contents are unimportant (we zero them out).
457 Subsequent entries look like this. See the SVR4 ABI 386
458 supplement to see how this works. */
460 /* For the s390, simple addr offset can only be 0 - 4096.
461 To use the full 2 GB address space, several instructions
462 are needed to load an address in a register and execute
463 a branch( or just saving the address)
465 Furthermore, only r 0 and 1 are free to use!!! */
467 /* The first 3 words in the GOT are then reserved.
468 Word 0 is the address of the dynamic table.
469 Word 1 is a pointer to a structure describing the object
470 Word 2 is used to point to the loader entry address.
472 The code for position independent PLT entries looks like this:
474 r12 holds addr of the current GOT at entry to the PLT
476 The GOT holds the address in the PLT to be executed.
477 The loader then gets:
478 24(15) = Pointer to the structure describing the object.
479 28(15) = Offset into rela.plt
481 The loader must then find the module where the function is
482 and insert the address in the GOT.
484 Note: 390 can only address +- 64 K relative.
485 We check if offset > 65536, then make a relative branch -64xxx
486 back to a previous defined branch
488 PLT1: BASR 1,0 # 2 bytes
489 L 1,22(1) # 4 bytes Load offset in GOT in r 1
490 L 1,(1,12) # 4 bytes Load address from GOT in r1
491 BCR 15,1 # 2 bytes Jump to address
492 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
493 L 1,14(1) # 4 bytes Load offset in symol table in r1
494 BRC 15,-x # 4 bytes Jump to start of PLT
495 .word 0 # 2 bytes filler
496 .long ? # 4 bytes offset in GOT
497 .long ? # 4 bytes offset into rela.plt
499 This was the general case. There are two additional, optimizes PLT
500 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
501 First the one for GOT offsets < 4096:
503 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
504 BCR 15,1 # 2 bytes Jump to address
505 .word 0,0,0 # 6 bytes filler
506 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
507 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
508 BRC 15,-x # 4 bytes Jump to start of PLT
509 .word 0,0,0 # 6 bytes filler
510 .long ? # 4 bytes offset into rela.plt
512 Second the one for GOT offsets < 32768:
514 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
515 L 1,(1,12) # 4 bytes Load address from GOT to r1
516 BCR 15,1 # 2 bytes Jump to address
517 .word 0 # 2 bytes filler
518 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
519 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
520 BRC 15,-x # 4 bytes Jump to start of PLT
521 .word 0,0,0 # 6 bytes filler
522 .long ? # 4 bytes offset into rela.plt
524 Total = 32 bytes per PLT entry
526 The code for static build PLT entries looks like this:
528 PLT1: BASR 1,0 # 2 bytes
529 L 1,22(1) # 4 bytes Load address of GOT entry
530 L 1,0(0,1) # 4 bytes Load address from GOT in r1
531 BCR 15,1 # 2 bytes Jump to address
532 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
533 L 1,14(1) # 4 bytes Load offset in symbol table in r1
534 BRC 15,-x # 4 bytes Jump to start of PLT
535 .word 0 # 2 bytes filler
536 .long ? # 4 bytes address of GOT entry
537 .long ? # 4 bytes offset into rela.plt */
539 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
543 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
544 0x07, 0xf1, /* br %r1 */
545 0x0d, 0x10, /* basr %r1,%r0 */
546 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
547 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
548 0x00, 0x00, /* padding */
549 0x00, 0x00, 0x00, 0x00, /* GOT offset */
550 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
553 /* Generic PLT pic entry. */
554 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
558 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
559 0x07, 0xf1, /* br %r1 */
560 0x0d, 0x10, /* basr %r1,%r0 */
561 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
562 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
563 0x00, 0x00, /* padding */
564 0x00, 0x00, 0x00, 0x00, /* GOT offset */
565 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
568 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
569 when generating the PLT slot with the GOT offset. */
570 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
572 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
573 0x07, 0xf1, /* br %r1 */
574 0x00, 0x00, 0x00, 0x00, /* padding */
576 0x0d, 0x10, /* basr %r1,%r0 */
577 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
578 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
579 0x00, 0x00, 0x00, 0x00,
580 0x00, 0x00, 0x00, 0x00
583 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
584 when generating the PLT slot with the GOT offset. */
585 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
587 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
588 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
589 0x07, 0xf1, /* br %r1 */
591 0x0d, 0x10, /* basr %r1,%r0 */
592 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
593 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
594 0x00, 0x00, 0x00, 0x00,
595 0x00, 0x00, 0x00, 0x00,
599 /* The first PLT entry pushes the offset into the rela.plt
600 from R1 onto the stack at 8(15) and the loader object info
601 at 12(15), loads the loader address in R1 and jumps to it. */
603 /* The first entry in the PLT for PIC code:
606 ST 1,28(15) # R1 has offset into rela.plt
607 L 1,4(12) # Get loader ino(object struct address)
608 ST 1,24(15) # Store address
609 L 1,8(12) # Entry address of loader in R1
610 BR 1 # Jump to loader
612 The first entry in the PLT for static code:
615 ST 1,28(15) # R1 has offset into rela.plt
617 L 1,18(0,1) # Get address of GOT
618 MVC 24(4,15),4(1) # Move loader ino to stack
619 L 1,8(1) # Get address of loader
620 BR 1 # Jump to loader
622 .long got # address of GOT */
624 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
626 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
627 0x0d, 0x10, /* basr %r1,%r0 */
628 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
629 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
630 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
631 0x07, 0xf1, /* br %r1 */
632 0x00, 0x00, 0x00, 0x00,
633 0x00, 0x00, 0x00, 0x00,
637 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
639 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
640 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
641 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
642 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
643 0x07, 0xf1, /* br %r1 */
644 0x00, 0x00, 0x00, 0x00,
645 0x00, 0x00, 0x00, 0x00,
646 0x00, 0x00, 0x00, 0x00,
651 /* s390 ELF linker hash entry. */
653 struct elf_s390_link_hash_entry
655 struct elf_link_hash_entry elf;
657 /* Track dynamic relocs copied for this symbol. */
658 struct elf_dyn_relocs *dyn_relocs;
660 /* Number of GOTPLT references for a function. */
661 bfd_signed_vma gotplt_refcount;
663 #define GOT_UNKNOWN 0
667 #define GOT_TLS_IE_NLT 4
668 unsigned char tls_type;
670 /* For pointer equality reasons we might need to change the symbol
671 type from STT_GNU_IFUNC to STT_FUNC together with its value and
672 section entry. So after alloc_dynrelocs only these values should
673 be used. In order to check whether a symbol is IFUNC use
674 s390_is_ifunc_symbol_p. */
675 bfd_vma ifunc_resolver_address;
676 asection *ifunc_resolver_section;
679 #define elf_s390_hash_entry(ent) \
680 ((struct elf_s390_link_hash_entry *)(ent))
682 /* This structure represents an entry in the local PLT list needed for
683 local IFUNC symbols. */
686 /* The section of the local symbol.
687 Set in relocate_section and used in finish_dynamic_sections. */
692 bfd_signed_vma refcount;
697 /* NOTE: Keep this structure in sync with
698 the one declared in elf64-s390.c. */
699 struct elf_s390_obj_tdata
701 struct elf_obj_tdata root;
703 /* A local PLT is needed for ifunc symbols. */
704 struct plt_entry *local_plt;
706 /* TLS type for each local got entry. */
707 char *local_got_tls_type;
710 #define elf_s390_tdata(abfd) \
711 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
713 #define elf_s390_local_plt(abfd) \
714 (elf_s390_tdata (abfd)->local_plt)
716 #define elf_s390_local_got_tls_type(abfd) \
717 (elf_s390_tdata (abfd)->local_got_tls_type)
719 #define is_s390_elf(bfd) \
720 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
721 && elf_tdata (bfd) != NULL \
722 && elf_object_id (bfd) == S390_ELF_DATA)
725 elf_s390_mkobject (bfd *abfd)
727 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
732 elf_s390_object_p (bfd *abfd)
734 /* Set the right machine number for an s390 elf32 file. */
735 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
738 /* s390 ELF linker hash table. */
740 struct elf_s390_link_hash_table
742 struct elf_link_hash_table elf;
744 /* Short-cuts to get to dynamic linker sections. */
749 bfd_signed_vma refcount;
753 /* Small local sym cache. */
754 struct sym_cache sym_cache;
757 /* Get the s390 ELF linker hash table from a link_info structure. */
759 #define elf_s390_hash_table(p) \
760 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
761 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
764 #include "elf-s390-common.c"
766 /* Create an entry in an s390 ELF linker hash table. */
768 static struct bfd_hash_entry *
769 link_hash_newfunc (struct bfd_hash_entry *entry,
770 struct bfd_hash_table *table,
773 /* Allocate the structure if it has not already been allocated by a
777 entry = bfd_hash_allocate (table,
778 sizeof (struct elf_s390_link_hash_entry));
783 /* Call the allocation method of the superclass. */
784 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
787 struct elf_s390_link_hash_entry *eh;
789 eh = (struct elf_s390_link_hash_entry *) entry;
790 eh->dyn_relocs = NULL;
791 eh->gotplt_refcount = 0;
792 eh->tls_type = GOT_UNKNOWN;
793 eh->ifunc_resolver_address = 0;
794 eh->ifunc_resolver_section = NULL;
800 /* Create an s390 ELF linker hash table. */
802 static struct bfd_link_hash_table *
803 elf_s390_link_hash_table_create (bfd *abfd)
805 struct elf_s390_link_hash_table *ret;
806 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
808 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
812 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
813 sizeof (struct elf_s390_link_hash_entry),
820 return &ret->elf.root;
823 /* Copy the extra info we tack onto an elf_link_hash_entry. */
826 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
827 struct elf_link_hash_entry *dir,
828 struct elf_link_hash_entry *ind)
830 struct elf_s390_link_hash_entry *edir, *eind;
832 edir = (struct elf_s390_link_hash_entry *) dir;
833 eind = (struct elf_s390_link_hash_entry *) ind;
835 if (eind->dyn_relocs != NULL)
837 if (edir->dyn_relocs != NULL)
839 struct elf_dyn_relocs **pp;
840 struct elf_dyn_relocs *p;
842 /* Add reloc counts against the indirect sym to the direct sym
843 list. Merge any entries against the same section. */
844 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
846 struct elf_dyn_relocs *q;
848 for (q = edir->dyn_relocs; q != NULL; q = q->next)
849 if (q->sec == p->sec)
851 q->pc_count += p->pc_count;
852 q->count += p->count;
859 *pp = edir->dyn_relocs;
862 edir->dyn_relocs = eind->dyn_relocs;
863 eind->dyn_relocs = NULL;
866 if (ind->root.type == bfd_link_hash_indirect
867 && dir->got.refcount <= 0)
869 edir->tls_type = eind->tls_type;
870 eind->tls_type = GOT_UNKNOWN;
873 if (ELIMINATE_COPY_RELOCS
874 && ind->root.type != bfd_link_hash_indirect
875 && dir->dynamic_adjusted)
877 /* If called to transfer flags for a weakdef during processing
878 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
879 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
880 if (dir->versioned != versioned_hidden)
881 dir->ref_dynamic |= ind->ref_dynamic;
882 dir->ref_regular |= ind->ref_regular;
883 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
884 dir->needs_plt |= ind->needs_plt;
887 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
891 elf_s390_tls_transition (struct bfd_link_info *info,
895 if (bfd_link_pic (info))
903 return R_390_TLS_LE32;
904 return R_390_TLS_IE32;
905 case R_390_TLS_GOTIE32:
907 return R_390_TLS_LE32;
908 return R_390_TLS_GOTIE32;
909 case R_390_TLS_LDM32:
910 return R_390_TLS_LE32;
916 /* Look through the relocs for a section during the first phase, and
917 allocate space in the global offset table or procedure linkage
921 elf_s390_check_relocs (bfd *abfd,
922 struct bfd_link_info *info,
924 const Elf_Internal_Rela *relocs)
926 struct elf_s390_link_hash_table *htab;
927 Elf_Internal_Shdr *symtab_hdr;
928 struct elf_link_hash_entry **sym_hashes;
929 const Elf_Internal_Rela *rel;
930 const Elf_Internal_Rela *rel_end;
932 bfd_signed_vma *local_got_refcounts;
933 int tls_type, old_tls_type;
934 Elf_Internal_Sym *isym;
936 if (bfd_link_relocatable (info))
939 BFD_ASSERT (is_s390_elf (abfd));
941 htab = elf_s390_hash_table (info);
942 symtab_hdr = &elf_symtab_hdr (abfd);
943 sym_hashes = elf_sym_hashes (abfd);
944 local_got_refcounts = elf_local_got_refcounts (abfd);
948 rel_end = relocs + sec->reloc_count;
949 for (rel = relocs; rel < rel_end; rel++)
952 unsigned int r_symndx;
953 struct elf_link_hash_entry *h;
955 r_symndx = ELF32_R_SYM (rel->r_info);
957 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
959 /* xgettext:c-format */
960 _bfd_error_handler (_("%pB: bad symbol index: %d"),
965 if (r_symndx < symtab_hdr->sh_info)
967 /* A local symbol. */
968 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
973 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
975 struct plt_entry *plt;
977 if (htab->elf.dynobj == NULL)
978 htab->elf.dynobj = abfd;
980 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
983 if (local_got_refcounts == NULL)
985 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
987 local_got_refcounts = elf_local_got_refcounts (abfd);
989 plt = elf_s390_local_plt (abfd);
990 plt[r_symndx].plt.refcount++;
996 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
997 while (h->root.type == bfd_link_hash_indirect
998 || h->root.type == bfd_link_hash_warning)
999 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1002 /* Create got section and local_got_refcounts array if they
1004 r_type = elf_s390_tls_transition (info,
1005 ELF32_R_TYPE (rel->r_info),
1014 case R_390_GOTPLT12:
1015 case R_390_GOTPLT16:
1016 case R_390_GOTPLT20:
1017 case R_390_GOTPLT32:
1018 case R_390_GOTPLTENT:
1019 case R_390_TLS_GD32:
1020 case R_390_TLS_GOTIE12:
1021 case R_390_TLS_GOTIE20:
1022 case R_390_TLS_GOTIE32:
1023 case R_390_TLS_IEENT:
1024 case R_390_TLS_IE32:
1025 case R_390_TLS_LDM32:
1027 && local_got_refcounts == NULL)
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1034 case R_390_GOTOFF16:
1035 case R_390_GOTOFF32:
1037 case R_390_GOTPCDBL:
1038 if (htab->elf.sgot == NULL)
1040 if (htab->elf.dynobj == NULL)
1041 htab->elf.dynobj = abfd;
1042 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1049 if (htab->elf.dynobj == NULL)
1050 htab->elf.dynobj = abfd;
1051 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1054 /* Make sure an IFUNC symbol defined in a non-shared object
1055 always gets a PLT slot. */
1056 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1058 /* The symbol is called by the dynamic loader in order
1059 to resolve the relocation. So it is in fact also
1068 case R_390_GOTPCDBL:
1069 /* These relocs do not need a GOT slot. They just load the
1070 GOT pointer itself or address something else relative to
1071 the GOT. Since the GOT pointer has been set up above we
1074 case R_390_GOTOFF16:
1075 case R_390_GOTOFF32:
1076 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1080 case R_390_PLT12DBL:
1081 case R_390_PLT16DBL:
1082 case R_390_PLT24DBL:
1083 case R_390_PLT32DBL:
1085 case R_390_PLTOFF16:
1086 case R_390_PLTOFF32:
1087 /* This symbol requires a procedure linkage table entry. We
1088 actually build the entry in adjust_dynamic_symbol,
1089 because this might be a case of linking PIC code which is
1090 never referenced by a dynamic object, in which case we
1091 don't need to generate a procedure linkage table entry
1094 /* If this is a local symbol, we resolve it directly without
1095 creating a procedure linkage table entry. */
1099 h->plt.refcount += 1;
1103 case R_390_GOTPLT12:
1104 case R_390_GOTPLT16:
1105 case R_390_GOTPLT20:
1106 case R_390_GOTPLT32:
1107 case R_390_GOTPLTENT:
1108 /* This symbol requires either a procedure linkage table entry
1109 or an entry in the local got. We actually build the entry
1110 in adjust_dynamic_symbol because whether this is really a
1111 global reference can change and with it the fact if we have
1112 to create a plt entry or a local got entry. To be able to
1113 make a once global symbol a local one we have to keep track
1114 of the number of gotplt references that exist for this
1118 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1120 h->plt.refcount += 1;
1123 local_got_refcounts[r_symndx] += 1;
1126 case R_390_TLS_LDM32:
1127 htab->tls_ldm_got.refcount += 1;
1130 case R_390_TLS_IE32:
1131 case R_390_TLS_GOTIE12:
1132 case R_390_TLS_GOTIE20:
1133 case R_390_TLS_GOTIE32:
1134 case R_390_TLS_IEENT:
1135 if (bfd_link_pic (info))
1136 info->flags |= DF_STATIC_TLS;
1144 case R_390_TLS_GD32:
1145 /* This symbol requires a global offset table entry. */
1154 tls_type = GOT_NORMAL;
1156 case R_390_TLS_GD32:
1157 tls_type = GOT_TLS_GD;
1159 case R_390_TLS_IE32:
1160 case R_390_TLS_GOTIE32:
1161 tls_type = GOT_TLS_IE;
1163 case R_390_TLS_GOTIE12:
1164 case R_390_TLS_GOTIE20:
1165 case R_390_TLS_IEENT:
1166 tls_type = GOT_TLS_IE_NLT;
1172 h->got.refcount += 1;
1173 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1177 local_got_refcounts[r_symndx] += 1;
1178 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1180 /* If a TLS symbol is accessed using IE at least once,
1181 there is no point to use dynamic model for it. */
1182 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1184 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1187 /* xgettext:c-format */
1188 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1189 abfd, h->root.root.string);
1192 if (old_tls_type > tls_type)
1193 tls_type = old_tls_type;
1196 if (old_tls_type != tls_type)
1199 elf_s390_hash_entry (h)->tls_type = tls_type;
1201 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1204 if (r_type != R_390_TLS_IE32)
1208 case R_390_TLS_LE32:
1209 /* For static linking and executables this reloc will be
1210 calculated at linktime otherwise a TLS_TPOFF runtime
1211 reloc will be generated. */
1212 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1215 if (!bfd_link_pic (info))
1217 info->flags |= DF_STATIC_TLS;
1229 if (h != NULL && bfd_link_executable (info))
1231 /* If this reloc is in a read-only section, we might
1232 need a copy reloc. We can't check reliably at this
1233 stage whether the section is read-only, as input
1234 sections have not yet been mapped to output sections.
1235 Tentatively set the flag for now, and correct in
1236 adjust_dynamic_symbol. */
1239 if (!bfd_link_pic (info))
1241 /* We may need a .plt entry if the function this reloc
1242 refers to is in a shared lib. */
1243 h->plt.refcount += 1;
1247 /* If we are creating a shared library, and this is a reloc
1248 against a global symbol, or a non PC relative reloc
1249 against a local symbol, then we need to copy the reloc
1250 into the shared library. However, if we are linking with
1251 -Bsymbolic, we do not need to copy a reloc against a
1252 global symbol which is defined in an object we are
1253 including in the link (i.e., DEF_REGULAR is set). At
1254 this point we have not seen all the input files, so it is
1255 possible that DEF_REGULAR is not set now but will be set
1256 later (it is never cleared). In case of a weak definition,
1257 DEF_REGULAR may be cleared later by a strong definition in
1258 a shared library. We account for that possibility below by
1259 storing information in the relocs_copied field of the hash
1260 table entry. A similar situation occurs when creating
1261 shared libraries and symbol visibility changes render the
1264 If on the other hand, we are creating an executable, we
1265 may need to keep relocations for symbols satisfied by a
1266 dynamic library if we manage to avoid copy relocs for the
1268 if ((bfd_link_pic (info)
1269 && (sec->flags & SEC_ALLOC) != 0
1270 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1272 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1273 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1274 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1275 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1277 && (! SYMBOLIC_BIND (info, h)
1278 || h->root.type == bfd_link_hash_defweak
1279 || !h->def_regular))))
1280 || (ELIMINATE_COPY_RELOCS
1281 && !bfd_link_pic (info)
1282 && (sec->flags & SEC_ALLOC) != 0
1284 && (h->root.type == bfd_link_hash_defweak
1285 || !h->def_regular)))
1287 struct elf_dyn_relocs *p;
1288 struct elf_dyn_relocs **head;
1290 /* We must copy these reloc types into the output file.
1291 Create a reloc section in dynobj and make room for
1295 if (htab->elf.dynobj == NULL)
1296 htab->elf.dynobj = abfd;
1298 sreloc = _bfd_elf_make_dynamic_reloc_section
1299 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1305 /* If this is a global symbol, we count the number of
1306 relocations we need for this symbol. */
1309 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1313 /* Track dynamic relocs needed for local syms too.
1314 We really need local syms available to do this
1319 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1324 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1328 vpp = &elf_section_data (s)->local_dynrel;
1329 head = (struct elf_dyn_relocs **) vpp;
1333 if (p == NULL || p->sec != sec)
1335 bfd_size_type amt = sizeof *p;
1337 p = ((struct elf_dyn_relocs *)
1338 bfd_alloc (htab->elf.dynobj, amt));
1349 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1353 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1354 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1359 /* This relocation describes the C++ object vtable hierarchy.
1360 Reconstruct it for later use during GC. */
1361 case R_390_GNU_VTINHERIT:
1362 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1366 /* This relocation describes which C++ vtable entries are actually
1367 used. Record for later use during GC. */
1368 case R_390_GNU_VTENTRY:
1369 BFD_ASSERT (h != NULL);
1371 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1383 /* Return the section that should be marked against GC for a given
1387 elf_s390_gc_mark_hook (asection *sec,
1388 struct bfd_link_info *info,
1389 Elf_Internal_Rela *rel,
1390 struct elf_link_hash_entry *h,
1391 Elf_Internal_Sym *sym)
1394 switch (ELF32_R_TYPE (rel->r_info))
1396 case R_390_GNU_VTINHERIT:
1397 case R_390_GNU_VTENTRY:
1400 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1404 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1405 entry but we found we will not create any. Called when we find we will
1406 not have any PLT for this symbol, by for example
1407 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1408 or elf_s390_size_dynamic_sections if no dynamic sections will be
1409 created (we're only linking static objects). */
1412 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1414 if (h->elf.root.type == bfd_link_hash_warning)
1415 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1417 if (h->gotplt_refcount <= 0)
1420 /* We simply add the number of gotplt references to the number
1421 * of got references for this symbol. */
1422 h->elf.got.refcount += h->gotplt_refcount;
1423 h->gotplt_refcount = -1;
1426 /* Find dynamic relocs for H that apply to read-only sections. */
1429 readonly_dynrelocs (struct elf_link_hash_entry *h)
1431 struct elf_dyn_relocs *p;
1433 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1435 asection *s = p->sec->output_section;
1437 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1443 /* Adjust a symbol defined by a dynamic object and referenced by a
1444 regular object. The current definition is in some section of the
1445 dynamic object, but we're not including those sections. We have to
1446 change the definition to something the rest of the link can
1450 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1451 struct elf_link_hash_entry *h)
1453 struct elf_s390_link_hash_table *htab;
1456 /* STT_GNU_IFUNC symbol must go through PLT. */
1457 if (s390_is_ifunc_symbol_p (h))
1459 /* All local STT_GNU_IFUNC references must be treated as local
1460 calls via local PLT. */
1461 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1463 bfd_size_type pc_count = 0, count = 0;
1464 struct elf_dyn_relocs **pp;
1465 struct elf_s390_link_hash_entry *eh;
1466 struct elf_dyn_relocs *p;
1468 eh = (struct elf_s390_link_hash_entry *) h;
1469 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1471 pc_count += p->pc_count;
1472 p->count -= p->pc_count;
1481 if (pc_count || count)
1485 if (h->plt.refcount <= 0)
1486 h->plt.refcount = 1;
1488 h->plt.refcount += 1;
1492 if (h->plt.refcount <= 0)
1494 h->plt.offset = (bfd_vma) -1;
1500 /* If this is a function, put it in the procedure linkage table. We
1501 will fill in the contents of the procedure linkage table later
1502 (although we could actually do it here). */
1503 if (h->type == STT_FUNC
1506 if (h->plt.refcount <= 0
1507 || SYMBOL_CALLS_LOCAL (info, h)
1508 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1509 && h->root.type != bfd_link_hash_undefweak))
1511 /* This case can occur if we saw a PLT32 reloc in an input
1512 file, but the symbol was never referred to by a dynamic
1513 object, or if all references were garbage collected. In
1514 such a case, we don't actually need to build a procedure
1515 linkage table, and we can just do a PC32 reloc instead. */
1516 h->plt.offset = (bfd_vma) -1;
1518 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1524 /* It's possible that we incorrectly decided a .plt reloc was
1525 needed for an R_390_PC32 reloc to a non-function sym in
1526 check_relocs. We can't decide accurately between function and
1527 non-function syms in check-relocs; Objects loaded later in
1528 the link may change h->type. So fix it now. */
1529 h->plt.offset = (bfd_vma) -1;
1531 /* If this is a weak symbol, and there is a real definition, the
1532 processor independent code will have arranged for us to see the
1533 real definition first, and we can just use the same value. */
1534 if (h->is_weakalias)
1536 struct elf_link_hash_entry *def = weakdef (h);
1537 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1538 h->root.u.def.section = def->root.u.def.section;
1539 h->root.u.def.value = def->root.u.def.value;
1540 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1541 h->non_got_ref = def->non_got_ref;
1545 /* This is a reference to a symbol defined by a dynamic object which
1546 is not a function. */
1548 /* If we are creating a shared library, we must presume that the
1549 only references to the symbol are via the global offset table.
1550 For such cases we need not do anything here; the relocations will
1551 be handled correctly by relocate_section. */
1552 if (bfd_link_pic (info))
1555 /* If there are no references to this symbol that do not use the
1556 GOT, we don't need to generate a copy reloc. */
1557 if (!h->non_got_ref)
1560 /* If -z nocopyreloc was given, we won't generate them either. */
1561 if (info->nocopyreloc)
1567 /* If we don't find any dynamic relocs in read-only sections, then
1568 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1569 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1575 /* We must allocate the symbol in our .dynbss section, which will
1576 become part of the .bss section of the executable. There will be
1577 an entry for this symbol in the .dynsym section. The dynamic
1578 object will contain position independent code, so all references
1579 from the dynamic object to this symbol will go through the global
1580 offset table. The dynamic linker will use the .dynsym entry to
1581 determine the address it must put in the global offset table, so
1582 both the dynamic object and the regular object will refer to the
1583 same memory location for the variable. */
1585 htab = elf_s390_hash_table (info);
1587 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1588 copy the initial value out of the dynamic object and into the
1589 runtime process image. */
1590 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1592 s = htab->elf.sdynrelro;
1593 srel = htab->elf.sreldynrelro;
1597 s = htab->elf.sdynbss;
1598 srel = htab->elf.srelbss;
1600 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1602 srel->size += sizeof (Elf32_External_Rela);
1606 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1609 /* Allocate space in .plt, .got and associated reloc sections for
1613 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1615 struct bfd_link_info *info;
1616 struct elf_s390_link_hash_table *htab;
1617 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1618 struct elf_dyn_relocs *p;
1620 if (h->root.type == bfd_link_hash_indirect)
1623 info = (struct bfd_link_info *) inf;
1624 htab = elf_s390_hash_table (info);
1626 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1627 here if it is defined and referenced in a non-shared object. */
1628 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1629 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1630 else if (htab->elf.dynamic_sections_created
1631 && h->plt.refcount > 0)
1633 /* Make sure this symbol is output as a dynamic symbol.
1634 Undefined weak syms won't yet be marked as dynamic. */
1635 if (h->dynindx == -1
1636 && !h->forced_local)
1638 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1642 if (bfd_link_pic (info)
1643 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1645 asection *s = htab->elf.splt;
1647 /* If this is the first .plt entry, make room for the special
1650 s->size += PLT_FIRST_ENTRY_SIZE;
1652 h->plt.offset = s->size;
1654 /* If this symbol is not defined in a regular file, and we are
1655 not generating a shared library, then set the symbol to this
1656 location in the .plt. This is required to make function
1657 pointers compare as equal between the normal executable and
1658 the shared library. */
1659 if (! bfd_link_pic (info)
1662 h->root.u.def.section = s;
1663 h->root.u.def.value = h->plt.offset;
1666 /* Make room for this entry. */
1667 s->size += PLT_ENTRY_SIZE;
1669 /* We also need to make an entry in the .got.plt section. */
1670 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1672 /* We also need to make an entry in the .rela.plt section. */
1673 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1677 h->plt.offset = (bfd_vma) -1;
1679 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1684 h->plt.offset = (bfd_vma) -1;
1686 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1689 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1690 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1691 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1692 we can save the dynamic TLS relocation. */
1693 if (h->got.refcount > 0
1694 && !bfd_link_pic (info)
1696 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1698 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1699 /* For the GOTIE access without a literal pool entry the offset has
1700 to be stored somewhere. The immediate value in the instruction
1701 is not bit enough so the value is stored in the got. */
1703 h->got.offset = htab->elf.sgot->size;
1704 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1707 h->got.offset = (bfd_vma) -1;
1709 else if (h->got.refcount > 0)
1713 int tls_type = elf_s390_hash_entry(h)->tls_type;
1715 /* Make sure this symbol is output as a dynamic symbol.
1716 Undefined weak syms won't yet be marked as dynamic. */
1717 if (h->dynindx == -1
1718 && !h->forced_local)
1720 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1725 h->got.offset = s->size;
1726 s->size += GOT_ENTRY_SIZE;
1727 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1728 if (tls_type == GOT_TLS_GD)
1729 s->size += GOT_ENTRY_SIZE;
1730 dyn = htab->elf.dynamic_sections_created;
1731 /* R_390_TLS_IE32 needs one dynamic relocation,
1732 R_390_TLS_GD32 needs one if local symbol and two if global. */
1733 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1734 || tls_type >= GOT_TLS_IE)
1735 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1736 else if (tls_type == GOT_TLS_GD)
1737 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1738 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1739 || h->root.type != bfd_link_hash_undefweak)
1740 && (bfd_link_pic (info)
1741 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1742 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1745 h->got.offset = (bfd_vma) -1;
1747 if (eh->dyn_relocs == NULL)
1750 /* In the shared -Bsymbolic case, discard space allocated for
1751 dynamic pc-relative relocs against symbols which turn out to be
1752 defined in regular objects. For the normal shared case, discard
1753 space for pc-relative relocs that have become local due to symbol
1754 visibility changes. */
1756 if (bfd_link_pic (info))
1758 if (SYMBOL_CALLS_LOCAL (info, h))
1760 struct elf_dyn_relocs **pp;
1762 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1764 p->count -= p->pc_count;
1773 /* Also discard relocs on undefined weak syms with non-default
1775 if (eh->dyn_relocs != NULL
1776 && h->root.type == bfd_link_hash_undefweak)
1778 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1779 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1780 eh->dyn_relocs = NULL;
1782 /* Make sure undefined weak symbols are output as a dynamic
1784 else if (h->dynindx == -1
1785 && !h->forced_local)
1787 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1792 else if (ELIMINATE_COPY_RELOCS)
1794 /* For the non-shared case, discard space for relocs against
1795 symbols which turn out to need copy relocs or are not
1801 || (htab->elf.dynamic_sections_created
1802 && (h->root.type == bfd_link_hash_undefweak
1803 || h->root.type == bfd_link_hash_undefined))))
1805 /* Make sure this symbol is output as a dynamic symbol.
1806 Undefined weak syms won't yet be marked as dynamic. */
1807 if (h->dynindx == -1
1808 && !h->forced_local)
1810 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1814 /* If that succeeded, we know we'll be keeping all the
1816 if (h->dynindx != -1)
1820 eh->dyn_relocs = NULL;
1825 /* Finally, allocate space. */
1826 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1828 asection *sreloc = elf_section_data (p->sec)->sreloc;
1830 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1836 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1837 read-only sections. */
1840 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1844 if (h->root.type == bfd_link_hash_indirect)
1847 sec = readonly_dynrelocs (h);
1850 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1852 info->flags |= DF_TEXTREL;
1853 info->callbacks->minfo
1854 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1855 sec->owner, h->root.root.string, sec);
1857 /* Not an error, just cut short the traversal. */
1863 /* Set the sizes of the dynamic sections. */
1866 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1867 struct bfd_link_info *info)
1869 struct elf_s390_link_hash_table *htab;
1875 htab = elf_s390_hash_table (info);
1876 dynobj = htab->elf.dynobj;
1880 if (htab->elf.dynamic_sections_created)
1882 /* Set the contents of the .interp section to the interpreter. */
1883 if (bfd_link_executable (info) && !info->nointerp)
1885 s = bfd_get_linker_section (dynobj, ".interp");
1888 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1889 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1893 /* Set up .got offsets for local syms, and space for local dynamic
1895 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1897 bfd_signed_vma *local_got;
1898 bfd_signed_vma *end_local_got;
1899 char *local_tls_type;
1900 bfd_size_type locsymcount;
1901 Elf_Internal_Shdr *symtab_hdr;
1903 struct plt_entry *local_plt;
1906 if (! is_s390_elf (ibfd))
1909 for (s = ibfd->sections; s != NULL; s = s->next)
1911 struct elf_dyn_relocs *p;
1913 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1915 if (!bfd_is_abs_section (p->sec)
1916 && bfd_is_abs_section (p->sec->output_section))
1918 /* Input section has been discarded, either because
1919 it is a copy of a linkonce section or due to
1920 linker script /DISCARD/, so we'll be discarding
1923 else if (p->count != 0)
1925 srela = elf_section_data (p->sec)->sreloc;
1926 srela->size += p->count * sizeof (Elf32_External_Rela);
1927 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1928 info->flags |= DF_TEXTREL;
1933 local_got = elf_local_got_refcounts (ibfd);
1937 symtab_hdr = &elf_symtab_hdr (ibfd);
1938 locsymcount = symtab_hdr->sh_info;
1939 end_local_got = local_got + locsymcount;
1940 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1942 srela = htab->elf.srelgot;
1943 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1947 *local_got = s->size;
1948 s->size += GOT_ENTRY_SIZE;
1949 if (*local_tls_type == GOT_TLS_GD)
1950 s->size += GOT_ENTRY_SIZE;
1951 if (bfd_link_pic (info))
1952 srela->size += sizeof (Elf32_External_Rela);
1955 *local_got = (bfd_vma) -1;
1957 local_plt = elf_s390_local_plt (ibfd);
1958 for (i = 0; i < symtab_hdr->sh_info; i++)
1960 if (local_plt[i].plt.refcount > 0)
1962 local_plt[i].plt.offset = htab->elf.iplt->size;
1963 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1964 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1965 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1968 local_plt[i].plt.offset = (bfd_vma) -1;
1972 if (htab->tls_ldm_got.refcount > 0)
1974 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1976 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1977 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1978 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1981 htab->tls_ldm_got.offset = -1;
1983 /* Allocate global sym .plt and .got entries, and space for global
1984 sym dynamic relocs. */
1985 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1987 /* We now have determined the sizes of the various dynamic sections.
1988 Allocate memory for them. */
1990 for (s = dynobj->sections; s != NULL; s = s->next)
1992 if ((s->flags & SEC_LINKER_CREATED) == 0)
1995 if (s == htab->elf.splt
1996 || s == htab->elf.sgot
1997 || s == htab->elf.sgotplt
1998 || s == htab->elf.sdynbss
1999 || s == htab->elf.sdynrelro
2000 || s == htab->elf.iplt
2001 || s == htab->elf.igotplt
2002 || s == htab->irelifunc)
2004 /* Strip this section if we don't need it; see the
2007 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2012 /* We use the reloc_count field as a counter if we need
2013 to copy relocs into the output file. */
2018 /* It's not one of our sections, so don't allocate space. */
2024 /* If we don't need this section, strip it from the
2025 output file. This is to handle .rela.bss and
2026 .rela.plt. We must create it in
2027 create_dynamic_sections, because it must be created
2028 before the linker maps input sections to output
2029 sections. The linker does that before
2030 adjust_dynamic_symbol is called, and it is that
2031 function which decides whether anything needs to go
2032 into these sections. */
2034 s->flags |= SEC_EXCLUDE;
2038 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2041 /* Allocate memory for the section contents. We use bfd_zalloc
2042 here in case unused entries are not reclaimed before the
2043 section's contents are written out. This should not happen,
2044 but this way if it does, we get a R_390_NONE reloc instead
2046 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2047 if (s->contents == NULL)
2051 if (htab->elf.dynamic_sections_created)
2053 /* Add some entries to the .dynamic section. We fill in the
2054 values later, in elf_s390_finish_dynamic_sections, but we
2055 must add the entries now so that we get the correct size for
2056 the .dynamic section. The DT_DEBUG entry is filled in by the
2057 dynamic linker and used by the debugger. */
2058 #define add_dynamic_entry(TAG, VAL) \
2059 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2061 if (bfd_link_executable (info))
2063 if (!add_dynamic_entry (DT_DEBUG, 0))
2067 if (htab->elf.splt->size != 0)
2069 if (!add_dynamic_entry (DT_PLTGOT, 0)
2070 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2071 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2072 || !add_dynamic_entry (DT_JMPREL, 0))
2078 if (!add_dynamic_entry (DT_RELA, 0)
2079 || !add_dynamic_entry (DT_RELASZ, 0)
2080 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2083 /* If any dynamic relocs apply to a read-only section,
2084 then we need a DT_TEXTREL entry. */
2085 if ((info->flags & DF_TEXTREL) == 0)
2086 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2088 if ((info->flags & DF_TEXTREL) != 0)
2090 if (!add_dynamic_entry (DT_TEXTREL, 0))
2095 #undef add_dynamic_entry
2100 /* Return the base VMA address which should be subtracted from real addresses
2101 when resolving @dtpoff relocation.
2102 This is PT_TLS segment p_vaddr. */
2105 dtpoff_base (struct bfd_link_info *info)
2107 /* If tls_sec is NULL, we should have signalled an error already. */
2108 if (elf_hash_table (info)->tls_sec == NULL)
2110 return elf_hash_table (info)->tls_sec->vma;
2113 /* Return the relocation value for @tpoff relocation
2114 if STT_TLS virtual address is ADDRESS. */
2117 tpoff (struct bfd_link_info *info, bfd_vma address)
2119 struct elf_link_hash_table *htab = elf_hash_table (info);
2121 /* If tls_sec is NULL, we should have signalled an error already. */
2122 if (htab->tls_sec == NULL)
2124 return htab->tls_size + htab->tls_sec->vma - address;
2127 /* Complain if TLS instruction relocation is against an invalid
2131 invalid_tls_insn (bfd *input_bfd,
2132 asection *input_section,
2133 Elf_Internal_Rela *rel)
2135 reloc_howto_type *howto;
2137 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2139 /* xgettext:c-format */
2140 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2143 (uint64_t) rel->r_offset,
2145 bfd_set_error (bfd_error_bad_value);
2148 /* Relocate a 390 ELF section. */
2151 elf_s390_relocate_section (bfd *output_bfd,
2152 struct bfd_link_info *info,
2154 asection *input_section,
2156 Elf_Internal_Rela *relocs,
2157 Elf_Internal_Sym *local_syms,
2158 asection **local_sections)
2160 struct elf_s390_link_hash_table *htab;
2161 Elf_Internal_Shdr *symtab_hdr;
2162 struct elf_link_hash_entry **sym_hashes;
2163 bfd_vma *local_got_offsets;
2164 Elf_Internal_Rela *rel;
2165 Elf_Internal_Rela *relend;
2167 if (!is_s390_elf (input_bfd))
2169 bfd_set_error (bfd_error_wrong_format);
2173 htab = elf_s390_hash_table (info);
2174 symtab_hdr = &elf_symtab_hdr (input_bfd);
2175 sym_hashes = elf_sym_hashes (input_bfd);
2176 local_got_offsets = elf_local_got_offsets (input_bfd);
2179 relend = relocs + input_section->reloc_count;
2180 for (; rel < relend; rel++)
2182 unsigned int r_type;
2183 reloc_howto_type *howto;
2184 unsigned long r_symndx;
2185 struct elf_link_hash_entry *h;
2186 Elf_Internal_Sym *sym;
2190 bfd_boolean unresolved_reloc;
2191 bfd_reloc_status_type r;
2193 asection *base_got = htab->elf.sgot;
2194 bfd_boolean resolved_to_zero;
2196 r_type = ELF32_R_TYPE (rel->r_info);
2197 if (r_type == (int) R_390_GNU_VTINHERIT
2198 || r_type == (int) R_390_GNU_VTENTRY)
2200 if (r_type >= (int) R_390_max)
2202 bfd_set_error (bfd_error_bad_value);
2206 howto = elf_howto_table + r_type;
2207 r_symndx = ELF32_R_SYM (rel->r_info);
2212 unresolved_reloc = FALSE;
2213 if (r_symndx < symtab_hdr->sh_info)
2215 sym = local_syms + r_symndx;
2216 sec = local_sections[r_symndx];
2217 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2219 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2220 if (local_plt == NULL)
2223 /* Address of the PLT slot. */
2224 relocation = (htab->elf.iplt->output_section->vma
2225 + htab->elf.iplt->output_offset
2226 + local_plt[r_symndx].plt.offset);
2230 case R_390_PLTOFF16:
2231 case R_390_PLTOFF32:
2232 relocation -= htab->elf.sgot->output_section->vma;
2234 case R_390_GOTPLT12:
2235 case R_390_GOTPLT16:
2236 case R_390_GOTPLT20:
2237 case R_390_GOTPLT32:
2238 case R_390_GOTPLTENT:
2245 /* Write the PLT slot address into the GOT slot. */
2246 bfd_put_32 (output_bfd, relocation,
2247 htab->elf.sgot->contents +
2248 local_got_offsets[r_symndx]);
2249 relocation = (local_got_offsets[r_symndx] +
2250 htab->elf.sgot->output_offset);
2252 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2253 relocation += htab->elf.sgot->output_section->vma;
2259 /* The output section is needed later in
2260 finish_dynamic_section when creating the dynamic
2262 local_plt[r_symndx].sec = sec;
2266 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2270 bfd_boolean warned ATTRIBUTE_UNUSED;
2271 bfd_boolean ignored ATTRIBUTE_UNUSED;
2273 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2274 r_symndx, symtab_hdr, sym_hashes,
2276 unresolved_reloc, warned, ignored);
2279 if (sec != NULL && discarded_section (sec))
2280 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2281 rel, 1, relend, howto, 0, contents);
2283 if (bfd_link_relocatable (info))
2286 resolved_to_zero = (h != NULL
2287 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2291 case R_390_GOTPLT12:
2292 case R_390_GOTPLT16:
2293 case R_390_GOTPLT20:
2294 case R_390_GOTPLT32:
2295 case R_390_GOTPLTENT:
2296 /* There are three cases for a GOTPLT relocation. 1) The
2297 relocation is against the jump slot entry of a plt that
2298 will get emitted to the output file. 2) The relocation
2299 is against the jump slot of a plt entry that has been
2300 removed. elf_s390_adjust_gotplt has created a GOT entry
2301 as replacement. 3) The relocation is against a local symbol.
2302 Cases 2) and 3) are the same as the GOT relocation code
2303 so we just have to test for case 1 and fall through for
2305 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2309 if (s390_is_ifunc_symbol_p (h))
2311 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2312 relocation = (plt_index * GOT_ENTRY_SIZE +
2313 htab->elf.igotplt->output_offset);
2314 if (r_type == R_390_GOTPLTENT)
2315 relocation += htab->elf.igotplt->output_section->vma;
2320 Current offset - size first entry / entry size. */
2321 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2324 /* Offset in GOT is PLT index plus GOT headers(3)
2325 times 4, addr & GOT addr. */
2326 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2327 if (r_type == R_390_GOTPLTENT)
2328 relocation += htab->elf.sgot->output_section->vma;
2330 unresolved_reloc = FALSE;
2340 /* Relocation is to the entry for this symbol in the global
2342 if (base_got == NULL)
2349 off = h->got.offset;
2350 dyn = htab->elf.dynamic_sections_created;
2352 if (s390_is_ifunc_symbol_p (h))
2354 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2355 if (off == (bfd_vma)-1)
2357 /* No explicit GOT usage so redirect to the
2359 base_got = htab->elf.igotplt;
2360 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2364 /* Explicit GOT slots must contain the address
2365 of the PLT slot. This will be handled in
2366 finish_dynamic_symbol. */
2369 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2370 bfd_link_pic (info),
2372 || (bfd_link_pic (info)
2373 && SYMBOL_REFERENCES_LOCAL (info, h))
2374 || (ELF_ST_VISIBILITY (h->other)
2375 && h->root.type == bfd_link_hash_undefweak))
2378 /* This is actually a static link, or it is a
2379 -Bsymbolic link and the symbol is defined
2380 locally, or the symbol was forced to be local
2381 because of a version file. We must initialize
2382 this entry in the global offset table. Since the
2383 offset must always be a multiple of 2, we use the
2384 least significant bit to record whether we have
2385 initialized it already.
2387 When doing a dynamic link, we create a .rel.got
2388 relocation entry to initialize the value. This
2389 is done in the finish_dynamic_symbol routine. */
2394 bfd_put_32 (output_bfd, relocation,
2395 base_got->contents + off);
2400 && bfd_link_pic (info)
2401 && SYMBOL_REFERENCES_LOCAL (info, h))
2402 /* lrl rx,sym@GOTENT -> larl rx, sym */
2403 && ((r_type == R_390_GOTENT
2404 && (bfd_get_16 (input_bfd,
2405 contents + rel->r_offset - 2)
2406 & 0xff0f) == 0xc40d)
2407 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2408 || (r_type == R_390_GOT20
2409 && (bfd_get_32 (input_bfd,
2410 contents + rel->r_offset - 2)
2411 & 0xff00f000) == 0xe300c000
2412 && bfd_get_8 (input_bfd,
2413 contents + rel->r_offset + 3) == 0x58)))
2415 unsigned short new_insn =
2416 (0xc000 | (bfd_get_8 (input_bfd,
2417 contents + rel->r_offset - 1) & 0xf0));
2418 bfd_put_16 (output_bfd, new_insn,
2419 contents + rel->r_offset - 2);
2420 r_type = R_390_PC32DBL;
2422 howto = elf_howto_table + r_type;
2423 relocation = h->root.u.def.value
2424 + h->root.u.def.section->output_section->vma
2425 + h->root.u.def.section->output_offset;
2430 unresolved_reloc = FALSE;
2434 if (local_got_offsets == NULL)
2437 off = local_got_offsets[r_symndx];
2439 /* The offset must always be a multiple of 4. We use
2440 the least significant bit to record whether we have
2441 already generated the necessary reloc. */
2446 bfd_put_32 (output_bfd, relocation,
2447 htab->elf.sgot->contents + off);
2449 if (bfd_link_pic (info))
2452 Elf_Internal_Rela outrel;
2455 srelgot = htab->elf.srelgot;
2456 if (srelgot == NULL)
2459 outrel.r_offset = (htab->elf.sgot->output_section->vma
2460 + htab->elf.sgot->output_offset
2462 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2463 outrel.r_addend = relocation;
2464 loc = srelgot->contents;
2465 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2466 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2469 local_got_offsets[r_symndx] |= 1;
2473 if (off >= (bfd_vma) -2)
2476 relocation = base_got->output_offset + off;
2478 /* For @GOTENT the relocation is against the offset between
2479 the instruction and the symbols entry in the GOT and not
2480 between the start of the GOT and the symbols entry. We
2481 add the vma of the GOT to get the correct value. */
2482 if ( r_type == R_390_GOTENT
2483 || r_type == R_390_GOTPLTENT)
2484 relocation += base_got->output_section->vma;
2488 case R_390_GOTOFF16:
2489 case R_390_GOTOFF32:
2490 /* Relocation is relative to the start of the global offset
2494 && s390_is_ifunc_symbol_p (h)
2496 && !bfd_link_executable (info))
2498 relocation = (htab->elf.iplt->output_section->vma
2499 + htab->elf.iplt->output_offset
2501 - htab->elf.sgot->output_section->vma);
2505 /* Note that sgot->output_offset is not involved in this
2506 calculation. We always want the start of .got. If we
2507 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2508 permitted by the ABI, we might have to change this
2510 relocation -= htab->elf.sgot->output_section->vma;
2514 case R_390_GOTPCDBL:
2515 /* Use global offset table as symbol value. */
2516 relocation = htab->elf.sgot->output_section->vma;
2517 unresolved_reloc = FALSE;
2520 case R_390_PLT12DBL:
2521 case R_390_PLT16DBL:
2522 case R_390_PLT24DBL:
2523 case R_390_PLT32DBL:
2525 /* Relocation is to the entry for this symbol in the
2526 procedure linkage table. */
2528 /* Resolve a PLT32 reloc against a local symbol directly,
2529 without using the procedure linkage table. */
2533 if (h->plt.offset == (bfd_vma) -1
2534 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2536 /* We didn't make a PLT entry for this symbol. This
2537 happens when statically linking PIC code, or when
2538 using -Bsymbolic. */
2542 if (s390_is_ifunc_symbol_p (h))
2543 relocation = (htab->elf.iplt->output_section->vma
2544 + htab->elf.iplt->output_offset
2547 relocation = (htab->elf.splt->output_section->vma
2548 + htab->elf.splt->output_offset
2550 unresolved_reloc = FALSE;
2553 case R_390_PLTOFF16:
2554 case R_390_PLTOFF32:
2555 /* Relocation is to the entry for this symbol in the
2556 procedure linkage table relative to the start of the GOT. */
2558 /* For local symbols or if we didn't make a PLT entry for
2559 this symbol resolve the symbol directly. */
2561 || h->plt.offset == (bfd_vma) -1
2562 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2564 relocation -= htab->elf.sgot->output_section->vma;
2568 if (s390_is_ifunc_symbol_p (h))
2569 relocation = (htab->elf.iplt->output_section->vma
2570 + htab->elf.iplt->output_offset
2572 - htab->elf.sgot->output_section->vma);
2574 relocation = (htab->elf.splt->output_section->vma
2575 + htab->elf.splt->output_offset
2577 - htab->elf.sgot->output_section->vma);
2578 unresolved_reloc = FALSE;
2588 && s390_is_ifunc_symbol_p (h)
2590 && !bfd_link_executable (info))
2592 /* This will not work our if the function does not
2593 happen to set up the GOT pointer for some other
2594 reason. 31 bit PLT entries require r12 to hold the
2596 FIXME: Implement an errorcheck.
2597 NOTE: It will work when brasl is not available
2598 (e.g. with -m31 -march=g5) since a local function
2599 call then does use GOTOFF which implies r12 being set
2601 relocation = (htab->elf.iplt->output_section->vma
2602 + htab->elf.iplt->output_offset
2611 if ((input_section->flags & SEC_ALLOC) == 0)
2615 && s390_is_ifunc_symbol_p (h)
2618 if (!bfd_link_pic (info))
2620 /* For a non-shared object STT_GNU_IFUNC symbol must
2622 relocation = (htab->elf.iplt->output_section->vma
2623 + htab->elf.iplt->output_offset
2629 /* For shared objects a runtime relocation is needed. */
2631 Elf_Internal_Rela outrel;
2634 /* Need a dynamic relocation to get the real function
2636 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2640 if (outrel.r_offset == (bfd_vma) -1
2641 || outrel.r_offset == (bfd_vma) -2)
2644 outrel.r_offset += (input_section->output_section->vma
2645 + input_section->output_offset);
2647 if (h->dynindx == -1
2649 || bfd_link_executable (info))
2651 /* This symbol is resolved locally. */
2652 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2653 outrel.r_addend = (h->root.u.def.value
2654 + h->root.u.def.section->output_section->vma
2655 + h->root.u.def.section->output_offset);
2659 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2660 outrel.r_addend = 0;
2663 sreloc = htab->elf.irelifunc;
2664 elf_append_rela (output_bfd, sreloc, &outrel);
2666 /* If this reloc is against an external symbol, we
2667 do not want to fiddle with the addend. Otherwise,
2668 we need to include the symbol value so that it
2669 becomes an addend for the dynamic reloc. For an
2670 internal symbol, we have updated addend. */
2675 if ((bfd_link_pic (info)
2677 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2678 && !resolved_to_zero)
2679 || h->root.type != bfd_link_hash_undefweak)
2680 && ((r_type != R_390_PC16
2681 && r_type != R_390_PC12DBL
2682 && r_type != R_390_PC16DBL
2683 && r_type != R_390_PC24DBL
2684 && r_type != R_390_PC32DBL
2685 && r_type != R_390_PC32)
2686 || !SYMBOL_CALLS_LOCAL (info, h)))
2687 || (ELIMINATE_COPY_RELOCS
2688 && !bfd_link_pic (info)
2694 || h->root.type == bfd_link_hash_undefweak
2695 || h->root.type == bfd_link_hash_undefined)))
2697 Elf_Internal_Rela outrel;
2698 bfd_boolean skip, relocate;
2702 /* When generating a shared object, these relocations
2703 are copied into the output file to be resolved at run
2710 _bfd_elf_section_offset (output_bfd, info, input_section,
2712 if (outrel.r_offset == (bfd_vma) -1)
2714 else if (outrel.r_offset == (bfd_vma) -2)
2715 skip = TRUE, relocate = TRUE;
2716 outrel.r_offset += (input_section->output_section->vma
2717 + input_section->output_offset);
2720 memset (&outrel, 0, sizeof outrel);
2723 && (r_type == R_390_PC16
2724 || r_type == R_390_PC12DBL
2725 || r_type == R_390_PC16DBL
2726 || r_type == R_390_PC24DBL
2727 || r_type == R_390_PC32DBL
2728 || r_type == R_390_PC32
2729 || !bfd_link_pic (info)
2730 || !SYMBOLIC_BIND (info, h)
2731 || !h->def_regular))
2733 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2734 outrel.r_addend = rel->r_addend;
2738 /* This symbol is local, or marked to become local. */
2739 outrel.r_addend = relocation + rel->r_addend;
2740 if (r_type == R_390_32)
2743 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2749 if (bfd_is_abs_section (sec))
2751 else if (sec == NULL || sec->owner == NULL)
2753 bfd_set_error(bfd_error_bad_value);
2760 osec = sec->output_section;
2761 sindx = elf_section_data (osec)->dynindx;
2764 osec = htab->elf.text_index_section;
2765 sindx = elf_section_data (osec)->dynindx;
2767 BFD_ASSERT (sindx != 0);
2769 /* We are turning this relocation into one
2770 against a section symbol, so subtract out
2771 the output section's address but not the
2772 offset of the input section in the output
2774 outrel.r_addend -= osec->vma;
2776 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2780 sreloc = elf_section_data (input_section)->sreloc;
2784 loc = sreloc->contents;
2785 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2786 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2788 /* If this reloc is against an external symbol, we do
2789 not want to fiddle with the addend. Otherwise, we
2790 need to include the symbol value so that it becomes
2791 an addend for the dynamic reloc. */
2797 /* Relocations for tls literal pool entries. */
2798 case R_390_TLS_IE32:
2799 if (bfd_link_pic (info))
2801 Elf_Internal_Rela outrel;
2805 outrel.r_offset = rel->r_offset
2806 + input_section->output_section->vma
2807 + input_section->output_offset;
2808 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2809 sreloc = elf_section_data (input_section)->sreloc;
2812 loc = sreloc->contents;
2813 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2814 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2818 case R_390_TLS_GD32:
2819 case R_390_TLS_GOTIE32:
2820 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2821 tls_type = GOT_UNKNOWN;
2822 if (h == NULL && local_got_offsets)
2823 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2826 tls_type = elf_s390_hash_entry(h)->tls_type;
2827 if (!bfd_link_pic (info)
2829 && tls_type >= GOT_TLS_IE)
2830 r_type = R_390_TLS_LE32;
2832 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2833 r_type = R_390_TLS_IE32;
2835 if (r_type == R_390_TLS_LE32)
2837 /* This relocation gets optimized away by the local exec
2838 access optimization. */
2839 BFD_ASSERT (! unresolved_reloc);
2840 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2841 contents + rel->r_offset);
2845 if (htab->elf.sgot == NULL)
2849 off = h->got.offset;
2852 if (local_got_offsets == NULL)
2855 off = local_got_offsets[r_symndx];
2864 Elf_Internal_Rela outrel;
2868 if (htab->elf.srelgot == NULL)
2871 outrel.r_offset = (htab->elf.sgot->output_section->vma
2872 + htab->elf.sgot->output_offset + off);
2874 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2875 if (r_type == R_390_TLS_GD32)
2876 dr_type = R_390_TLS_DTPMOD;
2878 dr_type = R_390_TLS_TPOFF;
2879 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2880 outrel.r_addend = relocation - dtpoff_base (info);
2882 outrel.r_addend = 0;
2883 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2884 loc = htab->elf.srelgot->contents;
2885 loc += htab->elf.srelgot->reloc_count++
2886 * sizeof (Elf32_External_Rela);
2887 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2889 if (r_type == R_390_TLS_GD32)
2893 BFD_ASSERT (! unresolved_reloc);
2894 bfd_put_32 (output_bfd,
2895 relocation - dtpoff_base (info),
2896 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2900 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2901 outrel.r_offset += GOT_ENTRY_SIZE;
2902 outrel.r_addend = 0;
2903 htab->elf.srelgot->reloc_count++;
2904 loc += sizeof (Elf32_External_Rela);
2905 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2912 local_got_offsets[r_symndx] |= 1;
2915 if (off >= (bfd_vma) -2)
2917 if (r_type == ELF32_R_TYPE (rel->r_info))
2919 relocation = htab->elf.sgot->output_offset + off;
2920 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2921 relocation += htab->elf.sgot->output_section->vma;
2922 unresolved_reloc = FALSE;
2926 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2927 contents + rel->r_offset);
2932 case R_390_TLS_GOTIE12:
2933 case R_390_TLS_GOTIE20:
2934 case R_390_TLS_IEENT:
2937 if (local_got_offsets == NULL)
2939 off = local_got_offsets[r_symndx];
2940 if (bfd_link_pic (info))
2941 goto emit_tls_relocs;
2945 off = h->got.offset;
2946 tls_type = elf_s390_hash_entry(h)->tls_type;
2947 if (bfd_link_pic (info)
2949 || tls_type < GOT_TLS_IE)
2950 goto emit_tls_relocs;
2953 if (htab->elf.sgot == NULL)
2956 BFD_ASSERT (! unresolved_reloc);
2957 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2958 htab->elf.sgot->contents + off);
2959 relocation = htab->elf.sgot->output_offset + off;
2960 if (r_type == R_390_TLS_IEENT)
2961 relocation += htab->elf.sgot->output_section->vma;
2962 unresolved_reloc = FALSE;
2965 case R_390_TLS_LDM32:
2966 if (! bfd_link_pic (info))
2967 /* The literal pool entry this relocation refers to gets ignored
2968 by the optimized code of the local exec model. Do nothing
2969 and the value will turn out zero. */
2972 if (htab->elf.sgot == NULL)
2975 off = htab->tls_ldm_got.offset;
2980 Elf_Internal_Rela outrel;
2983 if (htab->elf.srelgot == NULL)
2986 outrel.r_offset = (htab->elf.sgot->output_section->vma
2987 + htab->elf.sgot->output_offset + off);
2989 bfd_put_32 (output_bfd, 0,
2990 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2991 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2992 outrel.r_addend = 0;
2993 loc = htab->elf.srelgot->contents;
2994 loc += htab->elf.srelgot->reloc_count++
2995 * sizeof (Elf32_External_Rela);
2996 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2997 htab->tls_ldm_got.offset |= 1;
2999 relocation = htab->elf.sgot->output_offset + off;
3000 unresolved_reloc = FALSE;
3003 case R_390_TLS_LE32:
3004 if (bfd_link_dll (info))
3006 /* Linking a shared library with non-fpic code requires
3007 a R_390_TLS_TPOFF relocation. */
3008 Elf_Internal_Rela outrel;
3013 outrel.r_offset = rel->r_offset
3014 + input_section->output_section->vma
3015 + input_section->output_offset;
3016 if (h != NULL && h->dynindx != -1)
3020 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3022 outrel.r_addend = relocation - dtpoff_base (info);
3024 outrel.r_addend = 0;
3025 sreloc = elf_section_data (input_section)->sreloc;
3028 loc = sreloc->contents;
3029 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3030 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3034 BFD_ASSERT (! unresolved_reloc);
3035 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3036 contents + rel->r_offset);
3040 case R_390_TLS_LDO32:
3041 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3042 relocation -= dtpoff_base (info);
3044 /* When converting LDO to LE, we must negate. */
3045 relocation = -tpoff (info, relocation);
3048 /* Relocations for tls instructions. */
3049 case R_390_TLS_LOAD:
3050 case R_390_TLS_GDCALL:
3051 case R_390_TLS_LDCALL:
3052 tls_type = GOT_UNKNOWN;
3053 if (h == NULL && local_got_offsets)
3054 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3056 tls_type = elf_s390_hash_entry(h)->tls_type;
3058 if (tls_type == GOT_TLS_GD)
3061 if (r_type == R_390_TLS_LOAD)
3063 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3065 /* IE->LE transition. Four valid cases:
3066 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3067 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3068 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3069 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3070 unsigned int insn, ry;
3072 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3073 if ((insn & 0xff00f000) == 0x58000000)
3074 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3075 ry = (insn & 0x000f0000);
3076 else if ((insn & 0xff0f0000) == 0x58000000)
3077 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3078 ry = (insn & 0x0000f000) << 4;
3079 else if ((insn & 0xff00f000) == 0x5800c000)
3080 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3081 ry = (insn & 0x000f0000);
3082 else if ((insn & 0xff0f0000) == 0x580c0000)
3083 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3084 ry = (insn & 0x0000f000) << 4;
3087 invalid_tls_insn (input_bfd, input_section, rel);
3090 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3091 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3094 else if (r_type == R_390_TLS_GDCALL)
3098 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3099 if ((insn & 0xff000fff) != 0x4d000000 &&
3100 (insn & 0xffff0000) != 0xc0e50000 &&
3101 (insn & 0xff000000) != 0x0d000000)
3103 invalid_tls_insn (input_bfd, input_section, rel);
3106 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3108 if ((insn & 0xff000000) == 0x0d000000)
3110 /* GD->LE transition.
3111 basr rx, ry -> nopr r7 */
3112 insn = 0x07070000 | (insn & 0xffff);
3114 else if ((insn & 0xff000000) == 0x4d000000)
3116 /* GD->LE transition.
3117 bas %r14,0(%rx,%r13) -> bc 0,0 */
3122 /* GD->LE transition.
3123 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3125 bfd_put_16 (output_bfd, 0x0000,
3126 contents + rel->r_offset + 4);
3131 /* If basr is used in the pic case to invoke
3132 _tls_get_offset, something went wrong before. */
3133 if ((insn & 0xff000000) == 0x0d000000)
3135 invalid_tls_insn (input_bfd, input_section, rel);
3139 if ((insn & 0xff000000) == 0x4d000000)
3141 /* GD->IE transition.
3142 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3147 /* GD->IE transition.
3148 brasl %r14,__tls_get_addr@plt ->
3149 l %r2,0(%r2,%r12) ; bcr 0,0 */
3151 bfd_put_16 (output_bfd, 0x0700,
3152 contents + rel->r_offset + 4);
3155 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3157 else if (r_type == R_390_TLS_LDCALL)
3159 if (!bfd_link_pic (info))
3163 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3164 if ((insn & 0xff000fff) != 0x4d000000 &&
3165 (insn & 0xffff0000) != 0xc0e50000 &&
3166 (insn & 0xff000000) != 0x0d000000)
3168 invalid_tls_insn (input_bfd, input_section, rel);
3172 if ((insn & 0xff000000) == 0x0d000000)
3174 /* LD->LE transition.
3175 basr rx, ry -> nopr r7 */
3176 insn = 0x07070000 | (insn & 0xffff);
3178 else if ((insn & 0xff000000) == 0x4d000000)
3180 /* LD->LE transition.
3181 bas %r14,0(%rx,%r13) -> bc 0,0 */
3186 /* LD->LE transition.
3187 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3189 bfd_put_16 (output_bfd, 0x0000,
3190 contents + rel->r_offset + 4);
3192 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3201 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3202 because such sections are not SEC_ALLOC and thus ld.so will
3203 not process them. */
3204 if (unresolved_reloc
3205 && !((input_section->flags & SEC_DEBUGGING) != 0
3207 && _bfd_elf_section_offset (output_bfd, info, input_section,
3208 rel->r_offset) != (bfd_vma) -1)
3210 /* xgettext:c-format */
3211 (_("%pB(%pA+%#" PRIx64 "): "
3212 "unresolvable %s relocation against symbol `%s'"),
3215 (uint64_t) rel->r_offset,
3217 h->root.root.string);
3221 /* When applying a 24 bit reloc we need to start one byte
3222 earlier. Otherwise the 32 bit get/put bfd operations might
3223 access a byte after the actual section. */
3224 if (r_type == R_390_PC24DBL
3225 || r_type == R_390_PLT24DBL)
3228 if (r_type == R_390_20
3229 || r_type == R_390_GOT20
3230 || r_type == R_390_GOTPLT20
3231 || r_type == R_390_TLS_GOTIE20)
3233 relocation += rel->r_addend;
3234 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3235 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3236 contents, rel->r_offset,
3240 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3241 contents, rel->r_offset,
3242 relocation, rel->r_addend);
3244 if (r != bfd_reloc_ok)
3249 name = h->root.root.string;
3252 name = bfd_elf_string_from_elf_section (input_bfd,
3253 symtab_hdr->sh_link,
3258 name = bfd_section_name (input_bfd, sec);
3261 if (r == bfd_reloc_overflow)
3262 (*info->callbacks->reloc_overflow)
3263 (info, (h ? &h->root : NULL), name, howto->name,
3264 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3268 /* xgettext:c-format */
3269 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3270 input_bfd, input_section,
3271 (uint64_t) rel->r_offset, name, (int) r);
3280 /* Generate the PLT slots together with the dynamic relocations needed
3281 for IFUNC symbols. */
3284 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3285 struct bfd_link_info *info,
3286 struct elf_link_hash_entry *h,
3287 struct elf_s390_link_hash_table *htab,
3288 bfd_vma iplt_offset,
3289 bfd_vma resolver_address)
3293 bfd_vma igotiplt_offset;
3294 Elf_Internal_Rela rela;
3296 asection *plt, *gotplt, *relplt;
3297 bfd_vma relative_offset;
3299 if (htab->elf.iplt == NULL
3300 || htab->elf.igotplt == NULL
3301 || htab->elf.irelplt == NULL)
3304 gotplt = htab->elf.igotplt;
3305 relplt = htab->elf.irelplt;
3307 /* Index of the PLT slot within iplt section. */
3308 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3309 plt = htab->elf.iplt;
3310 /* Offset into the igot.plt section. */
3311 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3312 /* Offset into the got section. */
3313 got_offset = igotiplt_offset + gotplt->output_offset;
3315 /* S390 uses halfwords for relative branch calc! */
3316 relative_offset = - (plt->output_offset +
3317 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3318 /* If offset is > 32768, branch to a previous branch
3319 390 can only handle +-64 K jumps. */
3320 if ( -32768 > (int) relative_offset )
3322 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3324 /* Fill in the entry in the procedure linkage table. */
3325 if (!bfd_link_pic (info))
3327 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3330 /* Adjust jump to the first plt entry. */
3331 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3332 plt->contents + iplt_offset + 20);
3334 /* Push the GOT offset field. */
3335 bfd_put_32 (output_bfd,
3336 (gotplt->output_section->vma
3338 plt->contents + iplt_offset + 24);
3340 else if (got_offset < 4096)
3342 /* The GOT offset is small enough to be used directly as
3344 memcpy (plt->contents + iplt_offset,
3345 elf_s390_plt_pic12_entry,
3348 /* Put in the GOT offset as displacement value. The 0xc000
3349 value comes from the first word of the plt entry. Look
3350 at the elf_s390_plt_pic16_entry content. */
3351 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3352 plt->contents + iplt_offset + 2);
3354 /* Adjust the jump to the first plt entry. */
3355 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3356 plt->contents + iplt_offset + 20);
3358 else if (got_offset < 32768)
3360 /* The GOT offset is too big for a displacement but small
3361 enough to be a signed 16 bit immediate value as it can be
3362 used in an lhi instruction. */
3363 memcpy (plt->contents + iplt_offset,
3364 elf_s390_plt_pic16_entry,
3367 /* Put in the GOT offset for the lhi instruction. */
3368 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3369 plt->contents + iplt_offset + 2);
3371 /* Adjust the jump to the first plt entry. */
3372 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3373 plt->contents + iplt_offset + 20);
3377 memcpy (plt->contents + iplt_offset,
3378 elf_s390_plt_pic_entry,
3381 /* Adjust the jump to the first plt entry. */
3382 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3383 plt->contents + iplt_offset + 20);
3385 /* Push the GOT offset field. */
3386 bfd_put_32 (output_bfd, got_offset,
3387 plt->contents + iplt_offset + 24);
3389 /* Insert offset into reloc. table here. */
3390 bfd_put_32 (output_bfd, relplt->output_offset +
3391 iplt_index * RELA_ENTRY_SIZE,
3392 plt->contents + iplt_offset + 28);
3394 /* Fill in the entry in the global offset table.
3395 Points to instruction after GOT offset. */
3396 bfd_put_32 (output_bfd,
3397 (plt->output_section->vma
3398 + plt->output_offset
3401 gotplt->contents + igotiplt_offset);
3403 /* Fill in the entry in the .rela.plt section. */
3404 rela.r_offset = gotplt->output_section->vma + got_offset;
3408 || ((bfd_link_executable (info)
3409 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3412 /* The symbol can be locally resolved. */
3413 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3414 rela.r_addend = resolver_address;
3418 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3422 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3423 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3426 /* Finish up dynamic symbol handling. We set the contents of various
3427 dynamic sections here. */
3430 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3431 struct bfd_link_info *info,
3432 struct elf_link_hash_entry *h,
3433 Elf_Internal_Sym *sym)
3435 struct elf_s390_link_hash_table *htab;
3436 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3438 htab = elf_s390_hash_table (info);
3440 if (h->plt.offset != (bfd_vma) -1)
3444 Elf_Internal_Rela rela;
3446 bfd_vma relative_offset;
3448 /* This symbol has an entry in the procedure linkage table. Set
3450 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3452 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3453 htab, h->plt.offset,
3454 eh->ifunc_resolver_address +
3455 eh->ifunc_resolver_section->output_offset +
3456 eh->ifunc_resolver_section->output_section->vma);
3457 /* Do not return yet. Handling of explicit GOT slots of
3458 IFUNC symbols is below. */
3462 if (h->dynindx == -1
3463 || htab->elf.splt == NULL
3464 || htab->elf.sgotplt == NULL
3465 || htab->elf.srelplt == NULL)
3469 Current offset - size first entry / entry size. */
3470 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3472 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3474 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3476 /* S390 uses halfwords for relative branch calc! */
3477 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3478 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3479 /* If offset is > 32768, branch to a previous branch
3480 390 can only handle +-64 K jumps. */
3481 if ( -32768 > (int) relative_offset )
3483 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3485 /* Fill in the entry in the procedure linkage table. */
3486 if (!bfd_link_pic (info))
3488 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3491 /* Adjust jump to the first plt entry. */
3492 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3493 htab->elf.splt->contents + h->plt.offset + 20);
3495 /* Push the GOT offset field. */
3496 bfd_put_32 (output_bfd,
3497 (htab->elf.sgotplt->output_section->vma
3498 + htab->elf.sgotplt->output_offset
3500 htab->elf.splt->contents + h->plt.offset + 24);
3502 else if (got_offset < 4096)
3504 /* The GOT offset is small enough to be used directly as
3506 memcpy (htab->elf.splt->contents + h->plt.offset,
3507 elf_s390_plt_pic12_entry,
3510 /* Put in the GOT offset as displacement value. The 0xc000
3511 value comes from the first word of the plt entry. Look
3512 at the elf_s390_plt_pic12_entry content. */
3513 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3514 htab->elf.splt->contents + h->plt.offset + 2);
3516 /* Adjust the jump to the first plt entry. */
3517 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3518 htab->elf.splt->contents + h->plt.offset + 20);
3520 else if (got_offset < 32768)
3522 /* The GOT offset is too big for a displacement but small
3523 enough to be a signed 16 bit immediate value as it can be
3524 used in an lhi instruction. */
3525 memcpy (htab->elf.splt->contents + h->plt.offset,
3526 elf_s390_plt_pic16_entry,
3529 /* Put in the GOT offset for the lhi instruction. */
3530 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3531 htab->elf.splt->contents + h->plt.offset + 2);
3533 /* Adjust the jump to the first plt entry. */
3534 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3535 htab->elf.splt->contents + h->plt.offset + 20);
3539 memcpy (htab->elf.splt->contents + h->plt.offset,
3540 elf_s390_plt_pic_entry,
3543 /* Adjust the jump to the first plt entry. */
3544 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3545 htab->elf.splt->contents + h->plt.offset + 20);
3547 /* Push the GOT offset field. */
3548 bfd_put_32 (output_bfd, got_offset,
3549 htab->elf.splt->contents + h->plt.offset + 24);
3551 /* Insert offset into reloc. table here. */
3552 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3553 htab->elf.splt->contents + h->plt.offset + 28);
3555 /* Fill in the entry in the global offset table.
3556 Points to instruction after GOT offset. */
3557 bfd_put_32 (output_bfd,
3558 (htab->elf.splt->output_section->vma
3559 + htab->elf.splt->output_offset
3562 htab->elf.sgotplt->contents + got_offset);
3564 /* Fill in the entry in the .rela.plt section. */
3565 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3566 + htab->elf.sgotplt->output_offset
3568 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3570 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3571 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3573 if (!h->def_regular)
3575 /* Mark the symbol as undefined, rather than as defined in
3576 the .plt section. Leave the value alone. This is a clue
3577 for the dynamic linker, to make function pointer
3578 comparisons work between an application and shared
3580 sym->st_shndx = SHN_UNDEF;
3585 if (h->got.offset != (bfd_vma) -1
3586 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3587 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3588 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3590 Elf_Internal_Rela rela;
3593 /* This symbol has an entry in the global offset table. Set it
3596 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3599 rela.r_offset = (htab->elf.sgot->output_section->vma
3600 + htab->elf.sgot->output_offset
3601 + (h->got.offset &~ (bfd_vma) 1));
3603 /* If this is a static link, or it is a -Bsymbolic link and the
3604 symbol is defined locally or was forced to be local because
3605 of a version file, we just want to emit a RELATIVE reloc.
3606 The entry in the global offset table will already have been
3607 initialized in the relocate_section function. */
3608 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3610 if (bfd_link_pic (info))
3612 /* An explicit GOT slot usage needs GLOB_DAT. If the
3613 symbol references local the implicit got.iplt slot
3614 will be used and the IRELATIVE reloc has been created
3620 /* For non-shared objects explicit GOT slots must be
3621 filled with the PLT slot address for pointer
3622 equality reasons. */
3623 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3624 + htab->elf.iplt->output_offset
3626 htab->elf.sgot->contents + h->got.offset);
3630 else if (bfd_link_pic (info)
3631 && SYMBOL_REFERENCES_LOCAL (info, h))
3633 /* If this is a static link, or it is a -Bsymbolic link and
3634 the symbol is defined locally or was forced to be local
3635 because of a version file, we just want to emit a
3636 RELATIVE reloc. The entry in the global offset table
3637 will already have been initialized in the
3638 relocate_section function. */
3639 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3641 BFD_ASSERT((h->got.offset & 1) != 0);
3642 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3643 rela.r_addend = (h->root.u.def.value
3644 + h->root.u.def.section->output_section->vma
3645 + h->root.u.def.section->output_offset);
3649 BFD_ASSERT((h->got.offset & 1) == 0);
3651 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3652 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3656 loc = htab->elf.srelgot->contents;
3657 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3658 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3663 Elf_Internal_Rela rela;
3667 /* This symbols needs a copy reloc. Set it up. */
3669 if (h->dynindx == -1
3670 || (h->root.type != bfd_link_hash_defined
3671 && h->root.type != bfd_link_hash_defweak)
3672 || htab->elf.srelbss == NULL
3673 || htab->elf.sreldynrelro == NULL)
3676 rela.r_offset = (h->root.u.def.value
3677 + h->root.u.def.section->output_section->vma
3678 + h->root.u.def.section->output_offset);
3679 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3681 if (h->root.u.def.section == htab->elf.sdynrelro)
3682 s = htab->elf.sreldynrelro;
3684 s = htab->elf.srelbss;
3685 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3686 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3689 /* Mark some specially defined symbols as absolute. */
3690 if (h == htab->elf.hdynamic
3691 || h == htab->elf.hgot
3692 || h == htab->elf.hplt)
3693 sym->st_shndx = SHN_ABS;
3698 /* Used to decide how to sort relocs in an optimal manner for the
3699 dynamic linker, before writing them out. */
3701 static enum elf_reloc_type_class
3702 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3703 const asection *rel_sec ATTRIBUTE_UNUSED,
3704 const Elf_Internal_Rela *rela)
3706 bfd *abfd = info->output_bfd;
3707 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3708 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3709 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3710 Elf_Internal_Sym sym;
3712 if (htab->elf.dynsym == NULL
3713 || !bed->s->swap_symbol_in (abfd,
3714 (htab->elf.dynsym->contents
3715 + r_symndx * bed->s->sizeof_sym),
3719 /* Check relocation against STT_GNU_IFUNC symbol. */
3720 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3721 return reloc_class_ifunc;
3723 switch ((int) ELF32_R_TYPE (rela->r_info))
3725 case R_390_RELATIVE:
3726 return reloc_class_relative;
3727 case R_390_JMP_SLOT:
3728 return reloc_class_plt;
3730 return reloc_class_copy;
3732 return reloc_class_normal;
3736 /* Finish up the dynamic sections. */
3739 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3740 struct bfd_link_info *info)
3742 struct elf_s390_link_hash_table *htab;
3748 htab = elf_s390_hash_table (info);
3749 dynobj = htab->elf.dynobj;
3750 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3752 if (htab->elf.dynamic_sections_created)
3754 Elf32_External_Dyn *dyncon, *dynconend;
3756 if (sdyn == NULL || htab->elf.sgot == NULL)
3759 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3760 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3761 for (; dyncon < dynconend; dyncon++)
3763 Elf_Internal_Dyn dyn;
3766 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3774 s = htab->elf.sgotplt;
3775 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3779 s = htab->elf.srelplt;
3780 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3784 dyn.d_un.d_val = htab->elf.srelplt->size;
3785 if (htab->elf.irelplt)
3786 dyn.d_un.d_val += htab->elf.irelplt->size;
3790 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3793 /* Fill in the special first entry in the procedure linkage table. */
3794 if (htab->elf.splt && htab->elf.splt->size > 0)
3796 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3797 if (bfd_link_pic (info))
3799 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3800 PLT_FIRST_ENTRY_SIZE);
3804 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3805 PLT_FIRST_ENTRY_SIZE);
3806 bfd_put_32 (output_bfd,
3807 htab->elf.sgotplt->output_section->vma
3808 + htab->elf.sgotplt->output_offset,
3809 htab->elf.splt->contents + 24);
3811 elf_section_data (htab->elf.splt->output_section)
3812 ->this_hdr.sh_entsize = 4;
3817 if (htab->elf.sgotplt)
3819 /* Fill in the first three entries in the global offset table. */
3820 if (htab->elf.sgotplt->size > 0)
3822 bfd_put_32 (output_bfd,
3823 (sdyn == NULL ? (bfd_vma) 0
3824 : sdyn->output_section->vma + sdyn->output_offset),
3825 htab->elf.sgotplt->contents);
3826 /* One entry for shared object struct ptr. */
3827 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3828 /* One entry for _dl_runtime_resolve. */
3829 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3832 elf_section_data (htab->elf.sgotplt->output_section)
3833 ->this_hdr.sh_entsize = 4;
3835 /* Finish dynamic symbol for local IFUNC symbols. */
3836 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3838 struct plt_entry *local_plt;
3839 Elf_Internal_Sym *isym;
3840 Elf_Internal_Shdr *symtab_hdr;
3842 symtab_hdr = &elf_symtab_hdr (ibfd);
3844 if (!is_s390_elf (ibfd))
3847 local_plt = elf_s390_local_plt (ibfd);
3848 if (local_plt != NULL)
3849 for (i = 0; i < symtab_hdr->sh_info; i++)
3851 if (local_plt[i].plt.offset != (bfd_vma) -1)
3853 asection *sec = local_plt[i].sec;
3854 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3858 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3859 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3860 local_plt[i].plt.offset,
3862 + sec->output_section->vma
3863 + sec->output_offset);
3871 /* Support for core dump NOTE sections. */
3874 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3879 switch (note->descsz)
3884 case 224: /* S/390 Linux. */
3886 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3889 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3897 /* Make a ".reg/999" section. */
3898 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3899 size, note->descpos + offset);
3903 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3905 switch (note->descsz)
3910 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3911 elf_tdata (abfd)->core->pid
3912 = bfd_get_32 (abfd, note->descdata + 12);
3913 elf_tdata (abfd)->core->program
3914 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3915 elf_tdata (abfd)->core->command
3916 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3920 /* Note that for some reason, a spurious space is tacked
3921 onto the end of the args in some (at least one anyway)
3922 implementations, so strip it off if it exists. */
3925 char *command = elf_tdata (abfd)->core->command;
3926 int n = strlen (command);
3928 if (0 < n && command[n - 1] == ' ')
3929 command[n - 1] = '\0';
3936 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3948 char data[124] ATTRIBUTE_NONSTRING = { 0 };
3949 const char *fname, *psargs;
3951 va_start (ap, note_type);
3952 fname = va_arg (ap, const char *);
3953 psargs = va_arg (ap, const char *);
3956 strncpy (data + 28, fname, 16);
3957 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3959 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3960 -Wstringop-truncation:
3961 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3963 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3965 strncpy (data + 44, psargs, 80);
3966 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3969 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3970 &data, sizeof (data));
3975 char data[224] = { 0 };
3980 va_start (ap, note_type);
3981 pid = va_arg (ap, long);
3982 cursig = va_arg (ap, int);
3983 gregs = va_arg (ap, const void *);
3986 bfd_put_16 (abfd, cursig, data + 12);
3987 bfd_put_32 (abfd, pid, data + 24);
3988 memcpy (data + 72, gregs, 144);
3989 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3990 &data, sizeof (data));
3996 /* Return address for Ith PLT stub in section PLT, for relocation REL
3997 or (bfd_vma) -1 if it should not be included. */
4000 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4001 const arelent *rel ATTRIBUTE_UNUSED)
4003 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4006 /* Merge backend specific data from an object file to the output
4007 object file when linking. */
4010 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4012 bfd *obfd = info->output_bfd;
4014 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4017 if (!elf_s390_merge_obj_attributes (ibfd, info))
4020 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4025 #define TARGET_BIG_SYM s390_elf32_vec
4026 #define TARGET_BIG_NAME "elf32-s390"
4027 #define ELF_ARCH bfd_arch_s390
4028 #define ELF_TARGET_ID S390_ELF_DATA
4029 #define ELF_MACHINE_CODE EM_S390
4030 #define ELF_MACHINE_ALT1 EM_S390_OLD
4031 #define ELF_MAXPAGESIZE 0x1000
4033 #define elf_backend_can_gc_sections 1
4034 #define elf_backend_can_refcount 1
4035 #define elf_backend_want_got_plt 1
4036 #define elf_backend_plt_readonly 1
4037 #define elf_backend_want_plt_sym 0
4038 #define elf_backend_got_header_size 12
4039 #define elf_backend_want_dynrelro 1
4040 #define elf_backend_rela_normal 1
4042 #define elf_info_to_howto elf_s390_info_to_howto
4044 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4045 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4046 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4047 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4049 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4051 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4052 #define elf_backend_check_relocs elf_s390_check_relocs
4053 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4054 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4055 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4056 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4057 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4058 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4059 #define elf_backend_relocate_section elf_s390_relocate_section
4060 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4061 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4062 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4063 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4064 #define elf_backend_write_core_note elf_s390_write_core_note
4065 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4066 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4068 #define bfd_elf32_mkobject elf_s390_mkobject
4069 #define elf_backend_object_p elf_s390_object_p
4071 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4073 #include "elf32-target.h"