1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2016 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 ATTRIBUTE_UNUSED,
329 Elf_Internal_Rela *dst)
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
334 case R_390_GNU_VTINHERIT:
335 cache_ptr->howto = &elf32_s390_vtinherit_howto;
338 case R_390_GNU_VTENTRY:
339 cache_ptr->howto = &elf32_s390_vtentry_howto;
343 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
345 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
349 cache_ptr->howto = &elf_howto_table[r_type];
353 /* A relocation function which doesn't do anything. */
354 static bfd_reloc_status_type
355 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
356 arelent *reloc_entry,
357 asymbol *symbol ATTRIBUTE_UNUSED,
358 void * data ATTRIBUTE_UNUSED,
359 asection *input_section,
361 char **error_message ATTRIBUTE_UNUSED)
364 reloc_entry->address += input_section->output_offset;
368 /* Handle the large displacement relocs. */
369 static bfd_reloc_status_type
370 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
371 arelent *reloc_entry,
373 void * data ATTRIBUTE_UNUSED,
374 asection *input_section,
376 char **error_message ATTRIBUTE_UNUSED)
378 reloc_howto_type *howto = reloc_entry->howto;
382 if (output_bfd != (bfd *) NULL
383 && (symbol->flags & BSF_SECTION_SYM) == 0
384 && (! howto->partial_inplace
385 || reloc_entry->addend == 0))
387 reloc_entry->address += input_section->output_offset;
391 if (output_bfd != NULL)
392 return bfd_reloc_continue;
394 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
395 return bfd_reloc_outofrange;
397 relocation = (symbol->value
398 + symbol->section->output_section->vma
399 + symbol->section->output_offset);
400 relocation += reloc_entry->addend;
401 if (howto->pc_relative)
403 relocation -= (input_section->output_section->vma
404 + input_section->output_offset);
405 relocation -= reloc_entry->address;
408 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
409 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
410 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
412 if ((bfd_signed_vma) relocation < - 0x80000
413 || (bfd_signed_vma) relocation > 0x7ffff)
414 return bfd_reloc_overflow;
420 elf_s390_is_local_label_name (bfd *abfd, const char *name)
422 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
425 return _bfd_elf_is_local_label_name (abfd, name);
428 /* Functions for the 390 ELF linker. */
430 /* The name of the dynamic interpreter. This is put in the .interp
433 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
435 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
436 copying dynamic variables from a shared lib into an app's dynbss
437 section, and instead use a dynamic relocation to point into the
439 #define ELIMINATE_COPY_RELOCS 1
441 /* The size in bytes of the first entry in the procedure linkage table. */
442 #define PLT_FIRST_ENTRY_SIZE 32
443 /* The size in bytes of an entry in the procedure linkage table. */
444 #define PLT_ENTRY_SIZE 32
446 #define GOT_ENTRY_SIZE 4
448 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
450 /* The first three entries in a procedure linkage table are reserved,
451 and the initial contents are unimportant (we zero them out).
452 Subsequent entries look like this. See the SVR4 ABI 386
453 supplement to see how this works. */
455 /* For the s390, simple addr offset can only be 0 - 4096.
456 To use the full 2 GB address space, several instructions
457 are needed to load an address in a register and execute
458 a branch( or just saving the address)
460 Furthermore, only r 0 and 1 are free to use!!! */
462 /* The first 3 words in the GOT are then reserved.
463 Word 0 is the address of the dynamic table.
464 Word 1 is a pointer to a structure describing the object
465 Word 2 is used to point to the loader entry address.
467 The code for position independent PLT entries looks like this:
469 r12 holds addr of the current GOT at entry to the PLT
471 The GOT holds the address in the PLT to be executed.
472 The loader then gets:
473 24(15) = Pointer to the structure describing the object.
474 28(15) = Offset into rela.plt
476 The loader must then find the module where the function is
477 and insert the address in the GOT.
479 Note: 390 can only address +- 64 K relative.
480 We check if offset > 65536, then make a relative branch -64xxx
481 back to a previous defined branch
483 PLT1: BASR 1,0 # 2 bytes
484 L 1,22(1) # 4 bytes Load offset in GOT in r 1
485 L 1,(1,12) # 4 bytes Load address from GOT in r1
486 BCR 15,1 # 2 bytes Jump to address
487 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
488 L 1,14(1) # 4 bytes Load offset in symol table in r1
489 BRC 15,-x # 4 bytes Jump to start of PLT
490 .word 0 # 2 bytes filler
491 .long ? # 4 bytes offset in GOT
492 .long ? # 4 bytes offset into rela.plt
494 This was the general case. There are two additional, optimizes PLT
495 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
496 First the one for GOT offsets < 4096:
498 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
499 BCR 15,1 # 2 bytes Jump to address
500 .word 0,0,0 # 6 bytes filler
501 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
502 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
503 BRC 15,-x # 4 bytes Jump to start of PLT
504 .word 0,0,0 # 6 bytes filler
505 .long ? # 4 bytes offset into rela.plt
507 Second the one for GOT offsets < 32768:
509 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
510 L 1,(1,12) # 4 bytes Load address from GOT to r1
511 BCR 15,1 # 2 bytes Jump to address
512 .word 0 # 2 bytes filler
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
514 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
515 BRC 15,-x # 4 bytes Jump to start of PLT
516 .word 0,0,0 # 6 bytes filler
517 .long ? # 4 bytes offset into rela.plt
519 Total = 32 bytes per PLT entry
521 The code for static build PLT entries looks like this:
523 PLT1: BASR 1,0 # 2 bytes
524 L 1,22(1) # 4 bytes Load address of GOT entry
525 L 1,0(0,1) # 4 bytes Load address from GOT in r1
526 BCR 15,1 # 2 bytes Jump to address
527 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
528 L 1,14(1) # 4 bytes Load offset in symbol table in r1
529 BRC 15,-x # 4 bytes Jump to start of PLT
530 .word 0 # 2 bytes filler
531 .long ? # 4 bytes address of GOT entry
532 .long ? # 4 bytes offset into rela.plt */
534 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
536 0x0d, 0x10, /* basr %r1,%r0 */
537 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
538 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
539 0x07, 0xf1, /* br %r1 */
540 0x0d, 0x10, /* basr %r1,%r0 */
541 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
542 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
543 0x00, 0x00, /* padding */
544 0x00, 0x00, 0x00, 0x00, /* GOT offset */
545 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
548 /* Generic PLT pic entry. */
549 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
551 0x0d, 0x10, /* basr %r1,%r0 */
552 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
553 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
554 0x07, 0xf1, /* br %r1 */
555 0x0d, 0x10, /* basr %r1,%r0 */
556 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
557 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
558 0x00, 0x00, /* padding */
559 0x00, 0x00, 0x00, 0x00, /* GOT offset */
560 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
563 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
564 when generating the PLT slot with the GOT offset. */
565 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
567 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
568 0x07, 0xf1, /* br %r1 */
569 0x00, 0x00, 0x00, 0x00, /* padding */
571 0x0d, 0x10, /* basr %r1,%r0 */
572 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
573 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
574 0x00, 0x00, 0x00, 0x00,
575 0x00, 0x00, 0x00, 0x00
578 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
579 when generating the PLT slot with the GOT offset. */
580 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
582 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
583 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
584 0x07, 0xf1, /* br %r1 */
586 0x0d, 0x10, /* basr %r1,%r0 */
587 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
588 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
589 0x00, 0x00, 0x00, 0x00,
590 0x00, 0x00, 0x00, 0x00,
594 /* The first PLT entry pushes the offset into the rela.plt
595 from R1 onto the stack at 8(15) and the loader object info
596 at 12(15), loads the loader address in R1 and jumps to it. */
598 /* The first entry in the PLT for PIC code:
601 ST 1,28(15) # R1 has offset into rela.plt
602 L 1,4(12) # Get loader ino(object struct address)
603 ST 1,24(15) # Store address
604 L 1,8(12) # Entry address of loader in R1
605 BR 1 # Jump to loader
607 The first entry in the PLT for static code:
610 ST 1,28(15) # R1 has offset into rela.plt
612 L 1,18(0,1) # Get address of GOT
613 MVC 24(4,15),4(1) # Move loader ino to stack
614 L 1,8(1) # Get address of loader
615 BR 1 # Jump to loader
617 .long got # address of GOT */
619 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
621 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
622 0x0d, 0x10, /* basr %r1,%r0 */
623 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
624 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
625 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
626 0x07, 0xf1, /* br %r1 */
627 0x00, 0x00, 0x00, 0x00,
628 0x00, 0x00, 0x00, 0x00,
632 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
634 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
635 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
636 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
637 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
638 0x07, 0xf1, /* br %r1 */
639 0x00, 0x00, 0x00, 0x00,
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00, 0x00, 0x00,
646 /* s390 ELF linker hash entry. */
648 struct elf_s390_link_hash_entry
650 struct elf_link_hash_entry elf;
652 /* Track dynamic relocs copied for this symbol. */
653 struct elf_dyn_relocs *dyn_relocs;
655 /* Number of GOTPLT references for a function. */
656 bfd_signed_vma gotplt_refcount;
658 #define GOT_UNKNOWN 0
662 #define GOT_TLS_IE_NLT 4
663 unsigned char tls_type;
665 /* For pointer equality reasons we might need to change the symbol
666 type from STT_GNU_IFUNC to STT_FUNC together with its value and
667 section entry. So after alloc_dynrelocs only these values should
668 be used. In order to check whether a symbol is IFUNC use
669 s390_is_ifunc_symbol_p. */
670 bfd_vma ifunc_resolver_address;
671 asection *ifunc_resolver_section;
674 #define elf_s390_hash_entry(ent) \
675 ((struct elf_s390_link_hash_entry *)(ent))
677 /* This structure represents an entry in the local PLT list needed for
678 local IFUNC symbols. */
681 /* The section of the local symbol.
682 Set in relocate_section and used in finish_dynamic_sections. */
687 bfd_signed_vma refcount;
692 /* NOTE: Keep this structure in sync with
693 the one declared in elf64-s390.c. */
694 struct elf_s390_obj_tdata
696 struct elf_obj_tdata root;
698 /* A local PLT is needed for ifunc symbols. */
699 struct plt_entry *local_plt;
701 /* TLS type for each local got entry. */
702 char *local_got_tls_type;
705 #define elf_s390_tdata(abfd) \
706 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
708 #define elf_s390_local_plt(abfd) \
709 (elf_s390_tdata (abfd)->local_plt)
711 #define elf_s390_local_got_tls_type(abfd) \
712 (elf_s390_tdata (abfd)->local_got_tls_type)
714 #define is_s390_elf(bfd) \
715 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
716 && elf_tdata (bfd) != NULL \
717 && elf_object_id (bfd) == S390_ELF_DATA)
720 elf_s390_mkobject (bfd *abfd)
722 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
727 elf_s390_object_p (bfd *abfd)
729 /* Set the right machine number for an s390 elf32 file. */
730 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
733 /* s390 ELF linker hash table. */
735 struct elf_s390_link_hash_table
737 struct elf_link_hash_table elf;
739 /* Short-cuts to get to dynamic linker sections. */
746 bfd_signed_vma refcount;
750 /* Small local sym cache. */
751 struct sym_cache sym_cache;
754 /* Get the s390 ELF linker hash table from a link_info structure. */
756 #define elf_s390_hash_table(p) \
757 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
758 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
761 #include "elf-s390-common.c"
763 /* Create an entry in an s390 ELF linker hash table. */
765 static struct bfd_hash_entry *
766 link_hash_newfunc (struct bfd_hash_entry *entry,
767 struct bfd_hash_table *table,
770 /* Allocate the structure if it has not already been allocated by a
774 entry = bfd_hash_allocate (table,
775 sizeof (struct elf_s390_link_hash_entry));
780 /* Call the allocation method of the superclass. */
781 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
784 struct elf_s390_link_hash_entry *eh;
786 eh = (struct elf_s390_link_hash_entry *) entry;
787 eh->dyn_relocs = NULL;
788 eh->gotplt_refcount = 0;
789 eh->tls_type = GOT_UNKNOWN;
790 eh->ifunc_resolver_address = 0;
791 eh->ifunc_resolver_section = NULL;
797 /* Create an s390 ELF linker hash table. */
799 static struct bfd_link_hash_table *
800 elf_s390_link_hash_table_create (bfd *abfd)
802 struct elf_s390_link_hash_table *ret;
803 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
805 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
809 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
810 sizeof (struct elf_s390_link_hash_entry),
817 return &ret->elf.root;
820 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
821 shortcuts to them in our hash table. */
824 create_got_section (bfd *dynobj, struct bfd_link_info *info)
826 struct elf_s390_link_hash_table *htab;
828 if (! _bfd_elf_create_got_section (dynobj, info))
831 htab = elf_s390_hash_table (info);
832 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
833 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
834 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
835 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
841 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
842 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
846 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
848 struct elf_s390_link_hash_table *htab;
850 htab = elf_s390_hash_table (info);
851 if (!htab->elf.sgot && !create_got_section (dynobj, info))
854 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
857 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
858 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
859 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
860 if (!bfd_link_pic (info))
861 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
863 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
864 || (!bfd_link_pic (info) && !htab->srelbss))
870 /* Copy the extra info we tack onto an elf_link_hash_entry. */
873 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
874 struct elf_link_hash_entry *dir,
875 struct elf_link_hash_entry *ind)
877 struct elf_s390_link_hash_entry *edir, *eind;
879 edir = (struct elf_s390_link_hash_entry *) dir;
880 eind = (struct elf_s390_link_hash_entry *) ind;
882 if (eind->dyn_relocs != NULL)
884 if (edir->dyn_relocs != NULL)
886 struct elf_dyn_relocs **pp;
887 struct elf_dyn_relocs *p;
889 /* Add reloc counts against the indirect sym to the direct sym
890 list. Merge any entries against the same section. */
891 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
893 struct elf_dyn_relocs *q;
895 for (q = edir->dyn_relocs; q != NULL; q = q->next)
896 if (q->sec == p->sec)
898 q->pc_count += p->pc_count;
899 q->count += p->count;
906 *pp = edir->dyn_relocs;
909 edir->dyn_relocs = eind->dyn_relocs;
910 eind->dyn_relocs = NULL;
913 if (ind->root.type == bfd_link_hash_indirect
914 && dir->got.refcount <= 0)
916 edir->tls_type = eind->tls_type;
917 eind->tls_type = GOT_UNKNOWN;
920 if (ELIMINATE_COPY_RELOCS
921 && ind->root.type != bfd_link_hash_indirect
922 && dir->dynamic_adjusted)
924 /* If called to transfer flags for a weakdef during processing
925 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
926 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
927 dir->ref_dynamic |= ind->ref_dynamic;
928 dir->ref_regular |= ind->ref_regular;
929 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
930 dir->needs_plt |= ind->needs_plt;
933 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
937 elf_s390_tls_transition (struct bfd_link_info *info,
941 if (bfd_link_pic (info))
949 return R_390_TLS_LE32;
950 return R_390_TLS_IE32;
951 case R_390_TLS_GOTIE32:
953 return R_390_TLS_LE32;
954 return R_390_TLS_GOTIE32;
955 case R_390_TLS_LDM32:
956 return R_390_TLS_LE32;
962 /* Look through the relocs for a section during the first phase, and
963 allocate space in the global offset table or procedure linkage
967 elf_s390_check_relocs (bfd *abfd,
968 struct bfd_link_info *info,
970 const Elf_Internal_Rela *relocs)
972 struct elf_s390_link_hash_table *htab;
973 Elf_Internal_Shdr *symtab_hdr;
974 struct elf_link_hash_entry **sym_hashes;
975 const Elf_Internal_Rela *rel;
976 const Elf_Internal_Rela *rel_end;
978 bfd_signed_vma *local_got_refcounts;
979 int tls_type, old_tls_type;
980 Elf_Internal_Sym *isym;
982 if (bfd_link_relocatable (info))
985 BFD_ASSERT (is_s390_elf (abfd));
987 htab = elf_s390_hash_table (info);
988 symtab_hdr = &elf_symtab_hdr (abfd);
989 sym_hashes = elf_sym_hashes (abfd);
990 local_got_refcounts = elf_local_got_refcounts (abfd);
994 rel_end = relocs + sec->reloc_count;
995 for (rel = relocs; rel < rel_end; rel++)
998 unsigned long r_symndx;
999 struct elf_link_hash_entry *h;
1001 r_symndx = ELF32_R_SYM (rel->r_info);
1003 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1005 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1010 if (r_symndx < symtab_hdr->sh_info)
1012 /* A local symbol. */
1013 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1018 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1020 struct plt_entry *plt;
1022 if (htab->elf.dynobj == NULL)
1023 htab->elf.dynobj = abfd;
1025 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1028 if (local_got_refcounts == NULL)
1030 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1032 local_got_refcounts = elf_local_got_refcounts (abfd);
1034 plt = elf_s390_local_plt (abfd);
1035 plt[r_symndx].plt.refcount++;
1041 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1042 while (h->root.type == bfd_link_hash_indirect
1043 || h->root.type == bfd_link_hash_warning)
1044 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1046 /* PR15323, ref flags aren't set for references in the same
1048 h->root.non_ir_ref = 1;
1051 /* Create got section and local_got_refcounts array if they
1053 r_type = elf_s390_tls_transition (info,
1054 ELF32_R_TYPE (rel->r_info),
1063 case R_390_GOTPLT12:
1064 case R_390_GOTPLT16:
1065 case R_390_GOTPLT20:
1066 case R_390_GOTPLT32:
1067 case R_390_GOTPLTENT:
1068 case R_390_TLS_GD32:
1069 case R_390_TLS_GOTIE12:
1070 case R_390_TLS_GOTIE20:
1071 case R_390_TLS_GOTIE32:
1072 case R_390_TLS_IEENT:
1073 case R_390_TLS_IE32:
1074 case R_390_TLS_LDM32:
1076 && local_got_refcounts == NULL)
1078 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1080 local_got_refcounts = elf_local_got_refcounts (abfd);
1083 case R_390_GOTOFF16:
1084 case R_390_GOTOFF32:
1086 case R_390_GOTPCDBL:
1087 if (htab->elf.sgot == NULL)
1089 if (htab->elf.dynobj == NULL)
1090 htab->elf.dynobj = abfd;
1091 if (!create_got_section (htab->elf.dynobj, info))
1098 if (htab->elf.dynobj == NULL)
1099 htab->elf.dynobj = abfd;
1100 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1103 /* Make sure an IFUNC symbol defined in a non-shared object
1104 always gets a PLT slot. */
1105 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1107 /* The symbol is called by the dynamic loader in order
1108 to resolve the relocation. So it is in fact also
1117 case R_390_GOTPCDBL:
1118 /* These relocs do not need a GOT slot. They just load the
1119 GOT pointer itself or address something else relative to
1120 the GOT. Since the GOT pointer has been set up above we
1123 case R_390_GOTOFF16:
1124 case R_390_GOTOFF32:
1125 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1128 case R_390_PLT12DBL:
1129 case R_390_PLT16DBL:
1130 case R_390_PLT24DBL:
1131 case R_390_PLT32DBL:
1133 case R_390_PLTOFF16:
1134 case R_390_PLTOFF32:
1135 /* This symbol requires a procedure linkage table entry. We
1136 actually build the entry in adjust_dynamic_symbol,
1137 because this might be a case of linking PIC code which is
1138 never referenced by a dynamic object, in which case we
1139 don't need to generate a procedure linkage table entry
1142 /* If this is a local symbol, we resolve it directly without
1143 creating a procedure linkage table entry. */
1147 h->plt.refcount += 1;
1151 case R_390_GOTPLT12:
1152 case R_390_GOTPLT16:
1153 case R_390_GOTPLT20:
1154 case R_390_GOTPLT32:
1155 case R_390_GOTPLTENT:
1156 /* This symbol requires either a procedure linkage table entry
1157 or an entry in the local got. We actually build the entry
1158 in adjust_dynamic_symbol because whether this is really a
1159 global reference can change and with it the fact if we have
1160 to create a plt entry or a local got entry. To be able to
1161 make a once global symbol a local one we have to keep track
1162 of the number of gotplt references that exist for this
1166 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1168 h->plt.refcount += 1;
1171 local_got_refcounts[r_symndx] += 1;
1174 case R_390_TLS_LDM32:
1175 htab->tls_ldm_got.refcount += 1;
1178 case R_390_TLS_IE32:
1179 case R_390_TLS_GOTIE12:
1180 case R_390_TLS_GOTIE20:
1181 case R_390_TLS_GOTIE32:
1182 case R_390_TLS_IEENT:
1183 if (bfd_link_pic (info))
1184 info->flags |= DF_STATIC_TLS;
1192 case R_390_TLS_GD32:
1193 /* This symbol requires a global offset table entry. */
1202 tls_type = GOT_NORMAL;
1204 case R_390_TLS_GD32:
1205 tls_type = GOT_TLS_GD;
1207 case R_390_TLS_IE32:
1208 case R_390_TLS_GOTIE32:
1209 tls_type = GOT_TLS_IE;
1211 case R_390_TLS_GOTIE12:
1212 case R_390_TLS_GOTIE20:
1213 case R_390_TLS_IEENT:
1214 tls_type = GOT_TLS_IE_NLT;
1220 h->got.refcount += 1;
1221 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1225 local_got_refcounts[r_symndx] += 1;
1226 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1228 /* If a TLS symbol is accessed using IE at least once,
1229 there is no point to use dynamic model for it. */
1230 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1232 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1234 (*_bfd_error_handler)
1235 (_("%B: `%s' accessed both as normal and thread local symbol"),
1236 abfd, h->root.root.string);
1239 if (old_tls_type > tls_type)
1240 tls_type = old_tls_type;
1243 if (old_tls_type != tls_type)
1246 elf_s390_hash_entry (h)->tls_type = tls_type;
1248 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1251 if (r_type != R_390_TLS_IE32)
1255 case R_390_TLS_LE32:
1256 /* For static linking and executables this reloc will be
1257 calculated at linktime otherwise a TLS_TPOFF runtime
1258 reloc will be generated. */
1259 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1262 if (!bfd_link_pic (info))
1264 info->flags |= DF_STATIC_TLS;
1276 if (h != NULL && bfd_link_executable (info))
1278 /* If this reloc is in a read-only section, we might
1279 need a copy reloc. We can't check reliably at this
1280 stage whether the section is read-only, as input
1281 sections have not yet been mapped to output sections.
1282 Tentatively set the flag for now, and correct in
1283 adjust_dynamic_symbol. */
1286 if (!bfd_link_pic (info))
1288 /* We may need a .plt entry if the function this reloc
1289 refers to is in a shared lib. */
1290 h->plt.refcount += 1;
1294 /* If we are creating a shared library, and this is a reloc
1295 against a global symbol, or a non PC relative reloc
1296 against a local symbol, then we need to copy the reloc
1297 into the shared library. However, if we are linking with
1298 -Bsymbolic, we do not need to copy a reloc against a
1299 global symbol which is defined in an object we are
1300 including in the link (i.e., DEF_REGULAR is set). At
1301 this point we have not seen all the input files, so it is
1302 possible that DEF_REGULAR is not set now but will be set
1303 later (it is never cleared). In case of a weak definition,
1304 DEF_REGULAR may be cleared later by a strong definition in
1305 a shared library. We account for that possibility below by
1306 storing information in the relocs_copied field of the hash
1307 table entry. A similar situation occurs when creating
1308 shared libraries and symbol visibility changes render the
1311 If on the other hand, we are creating an executable, we
1312 may need to keep relocations for symbols satisfied by a
1313 dynamic library if we manage to avoid copy relocs for the
1315 if ((bfd_link_pic (info)
1316 && (sec->flags & SEC_ALLOC) != 0
1317 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1318 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1319 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1320 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1321 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1322 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1324 && (! SYMBOLIC_BIND (info, h)
1325 || h->root.type == bfd_link_hash_defweak
1326 || !h->def_regular))))
1327 || (ELIMINATE_COPY_RELOCS
1328 && !bfd_link_pic (info)
1329 && (sec->flags & SEC_ALLOC) != 0
1331 && (h->root.type == bfd_link_hash_defweak
1332 || !h->def_regular)))
1334 struct elf_dyn_relocs *p;
1335 struct elf_dyn_relocs **head;
1337 /* We must copy these reloc types into the output file.
1338 Create a reloc section in dynobj and make room for
1342 if (htab->elf.dynobj == NULL)
1343 htab->elf.dynobj = abfd;
1345 sreloc = _bfd_elf_make_dynamic_reloc_section
1346 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1352 /* If this is a global symbol, we count the number of
1353 relocations we need for this symbol. */
1356 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1360 /* Track dynamic relocs needed for local syms too.
1361 We really need local syms available to do this
1366 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1371 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1375 vpp = &elf_section_data (s)->local_dynrel;
1376 head = (struct elf_dyn_relocs **) vpp;
1380 if (p == NULL || p->sec != sec)
1382 bfd_size_type amt = sizeof *p;
1384 p = ((struct elf_dyn_relocs *)
1385 bfd_alloc (htab->elf.dynobj, amt));
1396 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1397 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1398 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1399 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1400 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1401 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1406 /* This relocation describes the C++ object vtable hierarchy.
1407 Reconstruct it for later use during GC. */
1408 case R_390_GNU_VTINHERIT:
1409 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1413 /* This relocation describes which C++ vtable entries are actually
1414 used. Record for later use during GC. */
1415 case R_390_GNU_VTENTRY:
1416 BFD_ASSERT (h != NULL);
1418 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1430 /* Return the section that should be marked against GC for a given
1434 elf_s390_gc_mark_hook (asection *sec,
1435 struct bfd_link_info *info,
1436 Elf_Internal_Rela *rel,
1437 struct elf_link_hash_entry *h,
1438 Elf_Internal_Sym *sym)
1441 switch (ELF32_R_TYPE (rel->r_info))
1443 case R_390_GNU_VTINHERIT:
1444 case R_390_GNU_VTENTRY:
1447 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1451 /* Update the got entry reference counts for the section being removed. */
1454 elf_s390_gc_sweep_hook (bfd *abfd,
1455 struct bfd_link_info *info,
1457 const Elf_Internal_Rela *relocs)
1459 struct elf_s390_link_hash_table *htab;
1460 Elf_Internal_Shdr *symtab_hdr;
1461 struct elf_link_hash_entry **sym_hashes;
1462 bfd_signed_vma *local_got_refcounts;
1463 const Elf_Internal_Rela *rel, *relend;
1465 if (bfd_link_relocatable (info))
1468 htab = elf_s390_hash_table (info);
1472 elf_section_data (sec)->local_dynrel = NULL;
1474 symtab_hdr = &elf_symtab_hdr (abfd);
1475 sym_hashes = elf_sym_hashes (abfd);
1476 local_got_refcounts = elf_local_got_refcounts (abfd);
1478 relend = relocs + sec->reloc_count;
1479 for (rel = relocs; rel < relend; rel++)
1481 unsigned long r_symndx;
1482 unsigned int r_type;
1483 struct elf_link_hash_entry *h = NULL;
1485 r_symndx = ELF32_R_SYM (rel->r_info);
1486 if (r_symndx >= symtab_hdr->sh_info)
1488 struct elf_s390_link_hash_entry *eh;
1489 struct elf_dyn_relocs **pp;
1490 struct elf_dyn_relocs *p;
1492 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1493 while (h->root.type == bfd_link_hash_indirect
1494 || h->root.type == bfd_link_hash_warning)
1495 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1496 eh = (struct elf_s390_link_hash_entry *) h;
1498 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1501 /* Everything must go for SEC. */
1508 Elf_Internal_Sym *isym;
1510 /* A local symbol. */
1511 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1516 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1518 struct plt_entry *plt = elf_s390_local_plt (abfd);
1519 if (plt[r_symndx].plt.refcount > 0)
1520 plt[r_symndx].plt.refcount--;
1524 r_type = ELF32_R_TYPE (rel->r_info);
1525 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1528 case R_390_TLS_LDM32:
1529 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1530 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1533 case R_390_GOTOFF16:
1534 case R_390_GOTOFF32:
1535 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1542 case R_390_GOTPCDBL:
1545 case R_390_TLS_GD32:
1546 case R_390_TLS_IE32:
1547 case R_390_TLS_GOTIE12:
1548 case R_390_TLS_GOTIE20:
1549 case R_390_TLS_GOTIE32:
1550 case R_390_TLS_IEENT:
1558 if (h->got.refcount > 0)
1559 h->got.refcount -= 1;
1561 else if (local_got_refcounts != NULL)
1563 if (local_got_refcounts[r_symndx] > 0)
1564 local_got_refcounts[r_symndx] -= 1;
1579 if (bfd_link_pic (info))
1583 case R_390_PLT12DBL:
1584 case R_390_PLT16DBL:
1585 case R_390_PLT24DBL:
1586 case R_390_PLT32DBL:
1588 case R_390_PLTOFF16:
1589 case R_390_PLTOFF32:
1592 if (h->plt.refcount > 0)
1593 h->plt.refcount -= 1;
1597 case R_390_GOTPLT12:
1598 case R_390_GOTPLT16:
1599 case R_390_GOTPLT20:
1600 case R_390_GOTPLT32:
1601 case R_390_GOTPLTENT:
1604 if (h->plt.refcount > 0)
1606 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1607 h->plt.refcount -= 1;
1610 else if (local_got_refcounts != NULL)
1612 if (local_got_refcounts[r_symndx] > 0)
1613 local_got_refcounts[r_symndx] -= 1;
1625 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1626 entry but we found we will not create any. Called when we find we will
1627 not have any PLT for this symbol, by for example
1628 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1629 or elf_s390_size_dynamic_sections if no dynamic sections will be
1630 created (we're only linking static objects). */
1633 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1635 if (h->elf.root.type == bfd_link_hash_warning)
1636 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1638 if (h->gotplt_refcount <= 0)
1641 /* We simply add the number of gotplt references to the number
1642 * of got references for this symbol. */
1643 h->elf.got.refcount += h->gotplt_refcount;
1644 h->gotplt_refcount = -1;
1647 /* Adjust a symbol defined by a dynamic object and referenced by a
1648 regular object. The current definition is in some section of the
1649 dynamic object, but we're not including those sections. We have to
1650 change the definition to something the rest of the link can
1654 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1655 struct elf_link_hash_entry *h)
1657 struct elf_s390_link_hash_table *htab;
1660 /* STT_GNU_IFUNC symbol must go through PLT. */
1661 if (s390_is_ifunc_symbol_p (h))
1663 /* All local STT_GNU_IFUNC references must be treated as local
1664 calls via local PLT. */
1665 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1667 bfd_size_type pc_count = 0, count = 0;
1668 struct elf_dyn_relocs **pp;
1669 struct elf_s390_link_hash_entry *eh;
1670 struct elf_dyn_relocs *p;
1672 eh = (struct elf_s390_link_hash_entry *) h;
1673 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1675 pc_count += p->pc_count;
1676 p->count -= p->pc_count;
1685 if (pc_count || count)
1689 if (h->plt.refcount <= 0)
1690 h->plt.refcount = 1;
1692 h->plt.refcount += 1;
1696 if (h->plt.refcount <= 0)
1698 h->plt.offset = (bfd_vma) -1;
1704 /* If this is a function, put it in the procedure linkage table. We
1705 will fill in the contents of the procedure linkage table later
1706 (although we could actually do it here). */
1707 if (h->type == STT_FUNC
1710 if (h->plt.refcount <= 0
1711 || SYMBOL_CALLS_LOCAL (info, h)
1712 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1713 && h->root.type != bfd_link_hash_undefweak))
1715 /* This case can occur if we saw a PLT32 reloc in an input
1716 file, but the symbol was never referred to by a dynamic
1717 object, or if all references were garbage collected. In
1718 such a case, we don't actually need to build a procedure
1719 linkage table, and we can just do a PC32 reloc instead. */
1720 h->plt.offset = (bfd_vma) -1;
1722 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1728 /* It's possible that we incorrectly decided a .plt reloc was
1729 needed for an R_390_PC32 reloc to a non-function sym in
1730 check_relocs. We can't decide accurately between function and
1731 non-function syms in check-relocs; Objects loaded later in
1732 the link may change h->type. So fix it now. */
1733 h->plt.offset = (bfd_vma) -1;
1735 /* If this is a weak symbol, and there is a real definition, the
1736 processor independent code will have arranged for us to see the
1737 real definition first, and we can just use the same value. */
1738 if (h->u.weakdef != NULL)
1740 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1741 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1742 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1743 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1744 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1745 h->non_got_ref = h->u.weakdef->non_got_ref;
1749 /* This is a reference to a symbol defined by a dynamic object which
1750 is not a function. */
1752 /* If we are creating a shared library, we must presume that the
1753 only references to the symbol are via the global offset table.
1754 For such cases we need not do anything here; the relocations will
1755 be handled correctly by relocate_section. */
1756 if (bfd_link_pic (info))
1759 /* If there are no references to this symbol that do not use the
1760 GOT, we don't need to generate a copy reloc. */
1761 if (!h->non_got_ref)
1764 /* If -z nocopyreloc was given, we won't generate them either. */
1765 if (info->nocopyreloc)
1771 if (ELIMINATE_COPY_RELOCS)
1773 struct elf_s390_link_hash_entry * eh;
1774 struct elf_dyn_relocs *p;
1776 eh = (struct elf_s390_link_hash_entry *) h;
1777 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1779 s = p->sec->output_section;
1780 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1784 /* If we didn't find any dynamic relocs in read-only sections, then
1785 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1793 /* We must allocate the symbol in our .dynbss section, which will
1794 become part of the .bss section of the executable. There will be
1795 an entry for this symbol in the .dynsym section. The dynamic
1796 object will contain position independent code, so all references
1797 from the dynamic object to this symbol will go through the global
1798 offset table. The dynamic linker will use the .dynsym entry to
1799 determine the address it must put in the global offset table, so
1800 both the dynamic object and the regular object will refer to the
1801 same memory location for the variable. */
1803 htab = elf_s390_hash_table (info);
1805 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1806 copy the initial value out of the dynamic object and into the
1807 runtime process image. */
1808 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1810 htab->srelbss->size += sizeof (Elf32_External_Rela);
1816 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1819 /* Allocate space in .plt, .got and associated reloc sections for
1823 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1825 struct bfd_link_info *info;
1826 struct elf_s390_link_hash_table *htab;
1827 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1828 struct elf_dyn_relocs *p;
1830 if (h->root.type == bfd_link_hash_indirect)
1833 info = (struct bfd_link_info *) inf;
1834 htab = elf_s390_hash_table (info);
1836 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1837 here if it is defined and referenced in a non-shared object. */
1838 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1839 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1840 else if (htab->elf.dynamic_sections_created
1841 && h->plt.refcount > 0)
1843 /* Make sure this symbol is output as a dynamic symbol.
1844 Undefined weak syms won't yet be marked as dynamic. */
1845 if (h->dynindx == -1
1846 && !h->forced_local)
1848 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1852 if (bfd_link_pic (info)
1853 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1855 asection *s = htab->elf.splt;
1857 /* If this is the first .plt entry, make room for the special
1860 s->size += PLT_FIRST_ENTRY_SIZE;
1862 h->plt.offset = s->size;
1864 /* If this symbol is not defined in a regular file, and we are
1865 not generating a shared library, then set the symbol to this
1866 location in the .plt. This is required to make function
1867 pointers compare as equal between the normal executable and
1868 the shared library. */
1869 if (! bfd_link_pic (info)
1872 h->root.u.def.section = s;
1873 h->root.u.def.value = h->plt.offset;
1876 /* Make room for this entry. */
1877 s->size += PLT_ENTRY_SIZE;
1879 /* We also need to make an entry in the .got.plt section, which
1880 will be placed in the .got section by the linker script. */
1881 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1883 /* We also need to make an entry in the .rela.plt section. */
1884 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1888 h->plt.offset = (bfd_vma) -1;
1890 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1895 h->plt.offset = (bfd_vma) -1;
1897 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1900 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1901 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1902 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1903 we can save the dynamic TLS relocation. */
1904 if (h->got.refcount > 0
1905 && !bfd_link_pic (info)
1907 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1909 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1910 /* For the GOTIE access without a literal pool entry the offset has
1911 to be stored somewhere. The immediate value in the instruction
1912 is not bit enough so the value is stored in the got. */
1914 h->got.offset = htab->elf.sgot->size;
1915 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1918 h->got.offset = (bfd_vma) -1;
1920 else if (h->got.refcount > 0)
1924 int tls_type = elf_s390_hash_entry(h)->tls_type;
1926 /* Make sure this symbol is output as a dynamic symbol.
1927 Undefined weak syms won't yet be marked as dynamic. */
1928 if (h->dynindx == -1
1929 && !h->forced_local)
1931 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1936 h->got.offset = s->size;
1937 s->size += GOT_ENTRY_SIZE;
1938 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1939 if (tls_type == GOT_TLS_GD)
1940 s->size += GOT_ENTRY_SIZE;
1941 dyn = htab->elf.dynamic_sections_created;
1942 /* R_390_TLS_IE32 needs one dynamic relocation,
1943 R_390_TLS_GD32 needs one if local symbol and two if global. */
1944 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1945 || tls_type >= GOT_TLS_IE)
1946 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1947 else if (tls_type == GOT_TLS_GD)
1948 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1949 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1950 || h->root.type != bfd_link_hash_undefweak)
1951 && (bfd_link_pic (info)
1952 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1953 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1956 h->got.offset = (bfd_vma) -1;
1958 if (eh->dyn_relocs == NULL)
1961 /* In the shared -Bsymbolic case, discard space allocated for
1962 dynamic pc-relative relocs against symbols which turn out to be
1963 defined in regular objects. For the normal shared case, discard
1964 space for pc-relative relocs that have become local due to symbol
1965 visibility changes. */
1967 if (bfd_link_pic (info))
1969 if (SYMBOL_CALLS_LOCAL (info, h))
1971 struct elf_dyn_relocs **pp;
1973 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1975 p->count -= p->pc_count;
1984 /* Also discard relocs on undefined weak syms with non-default
1986 if (eh->dyn_relocs != NULL
1987 && h->root.type == bfd_link_hash_undefweak)
1989 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1990 eh->dyn_relocs = NULL;
1992 /* Make sure undefined weak symbols are output as a dynamic
1994 else if (h->dynindx == -1
1995 && !h->forced_local)
1997 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2002 else if (ELIMINATE_COPY_RELOCS)
2004 /* For the non-shared case, discard space for relocs against
2005 symbols which turn out to need copy relocs or are not
2011 || (htab->elf.dynamic_sections_created
2012 && (h->root.type == bfd_link_hash_undefweak
2013 || h->root.type == bfd_link_hash_undefined))))
2015 /* Make sure this symbol is output as a dynamic symbol.
2016 Undefined weak syms won't yet be marked as dynamic. */
2017 if (h->dynindx == -1
2018 && !h->forced_local)
2020 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2024 /* If that succeeded, we know we'll be keeping all the
2026 if (h->dynindx != -1)
2030 eh->dyn_relocs = NULL;
2035 /* Finally, allocate space. */
2036 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2038 asection *sreloc = elf_section_data (p->sec)->sreloc;
2040 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2046 /* Find any dynamic relocs that apply to read-only sections. */
2049 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2051 struct elf_s390_link_hash_entry *eh;
2052 struct elf_dyn_relocs *p;
2054 eh = (struct elf_s390_link_hash_entry *) h;
2055 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2057 asection *s = p->sec->output_section;
2059 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2061 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2063 info->flags |= DF_TEXTREL;
2065 /* Not an error, just cut short the traversal. */
2072 /* Set the sizes of the dynamic sections. */
2075 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2076 struct bfd_link_info *info)
2078 struct elf_s390_link_hash_table *htab;
2084 htab = elf_s390_hash_table (info);
2085 dynobj = htab->elf.dynobj;
2089 if (htab->elf.dynamic_sections_created)
2091 /* Set the contents of the .interp section to the interpreter. */
2092 if (bfd_link_executable (info) && !info->nointerp)
2094 s = bfd_get_linker_section (dynobj, ".interp");
2097 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2098 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2102 /* Set up .got offsets for local syms, and space for local dynamic
2104 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2106 bfd_signed_vma *local_got;
2107 bfd_signed_vma *end_local_got;
2108 char *local_tls_type;
2109 bfd_size_type locsymcount;
2110 Elf_Internal_Shdr *symtab_hdr;
2112 struct plt_entry *local_plt;
2115 if (! is_s390_elf (ibfd))
2118 for (s = ibfd->sections; s != NULL; s = s->next)
2120 struct elf_dyn_relocs *p;
2122 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2124 if (!bfd_is_abs_section (p->sec)
2125 && bfd_is_abs_section (p->sec->output_section))
2127 /* Input section has been discarded, either because
2128 it is a copy of a linkonce section or due to
2129 linker script /DISCARD/, so we'll be discarding
2132 else if (p->count != 0)
2134 srela = elf_section_data (p->sec)->sreloc;
2135 srela->size += p->count * sizeof (Elf32_External_Rela);
2136 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2137 info->flags |= DF_TEXTREL;
2142 local_got = elf_local_got_refcounts (ibfd);
2146 symtab_hdr = &elf_symtab_hdr (ibfd);
2147 locsymcount = symtab_hdr->sh_info;
2148 end_local_got = local_got + locsymcount;
2149 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2151 srela = htab->elf.srelgot;
2152 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2156 *local_got = s->size;
2157 s->size += GOT_ENTRY_SIZE;
2158 if (*local_tls_type == GOT_TLS_GD)
2159 s->size += GOT_ENTRY_SIZE;
2160 if (bfd_link_pic (info))
2161 srela->size += sizeof (Elf32_External_Rela);
2164 *local_got = (bfd_vma) -1;
2166 local_plt = elf_s390_local_plt (ibfd);
2167 for (i = 0; i < symtab_hdr->sh_info; i++)
2169 if (local_plt[i].plt.refcount > 0)
2171 local_plt[i].plt.offset = htab->elf.iplt->size;
2172 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2173 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2174 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2177 local_plt[i].plt.offset = (bfd_vma) -1;
2181 if (htab->tls_ldm_got.refcount > 0)
2183 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2185 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2186 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2187 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2190 htab->tls_ldm_got.offset = -1;
2192 /* Allocate global sym .plt and .got entries, and space for global
2193 sym dynamic relocs. */
2194 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2196 /* We now have determined the sizes of the various dynamic sections.
2197 Allocate memory for them. */
2199 for (s = dynobj->sections; s != NULL; s = s->next)
2201 if ((s->flags & SEC_LINKER_CREATED) == 0)
2204 if (s == htab->elf.splt
2205 || s == htab->elf.sgot
2206 || s == htab->elf.sgotplt
2207 || s == htab->sdynbss
2208 || s == htab->elf.iplt
2209 || s == htab->elf.igotplt
2210 || s == htab->irelifunc)
2212 /* Strip this section if we don't need it; see the
2215 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2220 /* We use the reloc_count field as a counter if we need
2221 to copy relocs into the output file. */
2226 /* It's not one of our sections, so don't allocate space. */
2232 /* If we don't need this section, strip it from the
2233 output file. This is to handle .rela.bss and
2234 .rela.plt. We must create it in
2235 create_dynamic_sections, because it must be created
2236 before the linker maps input sections to output
2237 sections. The linker does that before
2238 adjust_dynamic_symbol is called, and it is that
2239 function which decides whether anything needs to go
2240 into these sections. */
2242 s->flags |= SEC_EXCLUDE;
2246 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2249 /* Allocate memory for the section contents. We use bfd_zalloc
2250 here in case unused entries are not reclaimed before the
2251 section's contents are written out. This should not happen,
2252 but this way if it does, we get a R_390_NONE reloc instead
2254 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2255 if (s->contents == NULL)
2259 if (htab->elf.dynamic_sections_created)
2261 /* Add some entries to the .dynamic section. We fill in the
2262 values later, in elf_s390_finish_dynamic_sections, but we
2263 must add the entries now so that we get the correct size for
2264 the .dynamic section. The DT_DEBUG entry is filled in by the
2265 dynamic linker and used by the debugger. */
2266 #define add_dynamic_entry(TAG, VAL) \
2267 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2269 if (bfd_link_executable (info))
2271 if (!add_dynamic_entry (DT_DEBUG, 0))
2275 if (htab->elf.splt->size != 0)
2277 if (!add_dynamic_entry (DT_PLTGOT, 0)
2278 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2279 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2280 || !add_dynamic_entry (DT_JMPREL, 0))
2286 if (!add_dynamic_entry (DT_RELA, 0)
2287 || !add_dynamic_entry (DT_RELASZ, 0)
2288 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2291 /* If any dynamic relocs apply to a read-only section,
2292 then we need a DT_TEXTREL entry. */
2293 if ((info->flags & DF_TEXTREL) == 0)
2294 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2296 if ((info->flags & DF_TEXTREL) != 0)
2298 if (!add_dynamic_entry (DT_TEXTREL, 0))
2303 #undef add_dynamic_entry
2308 /* Return the base VMA address which should be subtracted from real addresses
2309 when resolving @dtpoff relocation.
2310 This is PT_TLS segment p_vaddr. */
2313 dtpoff_base (struct bfd_link_info *info)
2315 /* If tls_sec is NULL, we should have signalled an error already. */
2316 if (elf_hash_table (info)->tls_sec == NULL)
2318 return elf_hash_table (info)->tls_sec->vma;
2321 /* Return the relocation value for @tpoff relocation
2322 if STT_TLS virtual address is ADDRESS. */
2325 tpoff (struct bfd_link_info *info, bfd_vma address)
2327 struct elf_link_hash_table *htab = elf_hash_table (info);
2329 /* If tls_sec is NULL, we should have signalled an error already. */
2330 if (htab->tls_sec == NULL)
2332 return htab->tls_size + htab->tls_sec->vma - address;
2335 /* Complain if TLS instruction relocation is against an invalid
2339 invalid_tls_insn (bfd *input_bfd,
2340 asection *input_section,
2341 Elf_Internal_Rela *rel)
2343 reloc_howto_type *howto;
2345 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2346 (*_bfd_error_handler)
2347 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2350 (long) rel->r_offset,
2352 bfd_set_error (bfd_error_bad_value);
2355 /* Relocate a 390 ELF section. */
2358 elf_s390_relocate_section (bfd *output_bfd,
2359 struct bfd_link_info *info,
2361 asection *input_section,
2363 Elf_Internal_Rela *relocs,
2364 Elf_Internal_Sym *local_syms,
2365 asection **local_sections)
2367 struct elf_s390_link_hash_table *htab;
2368 Elf_Internal_Shdr *symtab_hdr;
2369 struct elf_link_hash_entry **sym_hashes;
2370 bfd_vma *local_got_offsets;
2371 Elf_Internal_Rela *rel;
2372 Elf_Internal_Rela *relend;
2374 BFD_ASSERT (is_s390_elf (input_bfd));
2376 htab = elf_s390_hash_table (info);
2377 symtab_hdr = &elf_symtab_hdr (input_bfd);
2378 sym_hashes = elf_sym_hashes (input_bfd);
2379 local_got_offsets = elf_local_got_offsets (input_bfd);
2382 relend = relocs + input_section->reloc_count;
2383 for (; rel < relend; rel++)
2385 unsigned int r_type;
2386 reloc_howto_type *howto;
2387 unsigned long r_symndx;
2388 struct elf_link_hash_entry *h;
2389 Elf_Internal_Sym *sym;
2393 bfd_boolean unresolved_reloc;
2394 bfd_reloc_status_type r;
2396 asection *base_got = htab->elf.sgot;
2398 r_type = ELF32_R_TYPE (rel->r_info);
2399 if (r_type == (int) R_390_GNU_VTINHERIT
2400 || r_type == (int) R_390_GNU_VTENTRY)
2402 if (r_type >= (int) R_390_max)
2404 bfd_set_error (bfd_error_bad_value);
2408 howto = elf_howto_table + r_type;
2409 r_symndx = ELF32_R_SYM (rel->r_info);
2414 unresolved_reloc = FALSE;
2415 if (r_symndx < symtab_hdr->sh_info)
2417 sym = local_syms + r_symndx;
2418 sec = local_sections[r_symndx];
2419 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2421 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2422 if (local_plt == NULL)
2425 /* Address of the PLT slot. */
2426 relocation = (htab->elf.iplt->output_section->vma
2427 + htab->elf.iplt->output_offset
2428 + local_plt[r_symndx].plt.offset);
2432 case R_390_PLTOFF16:
2433 case R_390_PLTOFF32:
2434 relocation -= htab->elf.sgot->output_section->vma;
2436 case R_390_GOTPLT12:
2437 case R_390_GOTPLT16:
2438 case R_390_GOTPLT20:
2439 case R_390_GOTPLT32:
2440 case R_390_GOTPLTENT:
2447 /* Write the PLT slot address into the GOT slot. */
2448 bfd_put_32 (output_bfd, relocation,
2449 htab->elf.sgot->contents +
2450 local_got_offsets[r_symndx]);
2451 relocation = (local_got_offsets[r_symndx] +
2452 htab->elf.sgot->output_offset);
2454 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2455 relocation += htab->elf.sgot->output_section->vma;
2461 /* The output section is needed later in
2462 finish_dynamic_section when creating the dynamic
2464 local_plt[r_symndx].sec = sec;
2468 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2472 bfd_boolean warned ATTRIBUTE_UNUSED;
2473 bfd_boolean ignored ATTRIBUTE_UNUSED;
2475 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2476 r_symndx, symtab_hdr, sym_hashes,
2478 unresolved_reloc, warned, ignored);
2481 if (sec != NULL && discarded_section (sec))
2482 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2483 rel, 1, relend, howto, 0, contents);
2485 if (bfd_link_relocatable (info))
2490 case R_390_GOTPLT12:
2491 case R_390_GOTPLT16:
2492 case R_390_GOTPLT20:
2493 case R_390_GOTPLT32:
2494 case R_390_GOTPLTENT:
2495 /* There are three cases for a GOTPLT relocation. 1) The
2496 relocation is against the jump slot entry of a plt that
2497 will get emitted to the output file. 2) The relocation
2498 is against the jump slot of a plt entry that has been
2499 removed. elf_s390_adjust_gotplt has created a GOT entry
2500 as replacement. 3) The relocation is against a local symbol.
2501 Cases 2) and 3) are the same as the GOT relocation code
2502 so we just have to test for case 1 and fall through for
2504 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2508 if (s390_is_ifunc_symbol_p (h))
2510 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2511 relocation = (plt_index * GOT_ENTRY_SIZE +
2512 htab->elf.igotplt->output_offset);
2513 if (r_type == R_390_GOTPLTENT)
2514 relocation += htab->elf.igotplt->output_section->vma;
2519 Current offset - size first entry / entry size. */
2520 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2523 /* Offset in GOT is PLT index plus GOT headers(3)
2524 times 4, addr & GOT addr. */
2525 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2526 if (r_type == R_390_GOTPLTENT)
2527 relocation += htab->elf.sgot->output_section->vma;
2529 unresolved_reloc = FALSE;
2539 /* Relocation is to the entry for this symbol in the global
2541 if (base_got == NULL)
2548 off = h->got.offset;
2549 dyn = htab->elf.dynamic_sections_created;
2551 if (s390_is_ifunc_symbol_p (h))
2553 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2554 if (off == (bfd_vma)-1)
2556 /* No explicit GOT usage so redirect to the
2558 base_got = htab->elf.igotplt;
2559 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2563 /* Explicit GOT slots must contain the address
2564 of the PLT slot. This will be handled in
2565 finish_dynamic_symbol. */
2568 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2569 bfd_link_pic (info),
2571 || (bfd_link_pic (info)
2572 && SYMBOL_REFERENCES_LOCAL (info, h))
2573 || (ELF_ST_VISIBILITY (h->other)
2574 && h->root.type == bfd_link_hash_undefweak))
2577 /* This is actually a static link, or it is a
2578 -Bsymbolic link and the symbol is defined
2579 locally, or the symbol was forced to be local
2580 because of a version file. We must initialize
2581 this entry in the global offset table. Since the
2582 offset must always be a multiple of 2, we use the
2583 least significant bit to record whether we have
2584 initialized it already.
2586 When doing a dynamic link, we create a .rel.got
2587 relocation entry to initialize the value. This
2588 is done in the finish_dynamic_symbol routine. */
2593 bfd_put_32 (output_bfd, relocation,
2594 base_got->contents + off);
2599 && bfd_link_pic (info)
2600 && SYMBOL_REFERENCES_LOCAL (info, h))
2601 /* lrl rx,sym@GOTENT -> larl rx, sym */
2602 && ((r_type == R_390_GOTENT
2603 && (bfd_get_16 (input_bfd,
2604 contents + rel->r_offset - 2)
2605 & 0xff0f) == 0xc40d)
2606 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2607 || (r_type == R_390_GOT20
2608 && (bfd_get_32 (input_bfd,
2609 contents + rel->r_offset - 2)
2610 & 0xff00f000) == 0xe300c000
2611 && bfd_get_8 (input_bfd,
2612 contents + rel->r_offset + 3) == 0x58)))
2614 unsigned short new_insn =
2615 (0xc000 | (bfd_get_8 (input_bfd,
2616 contents + rel->r_offset - 1) & 0xf0));
2617 bfd_put_16 (output_bfd, new_insn,
2618 contents + rel->r_offset - 2);
2619 r_type = R_390_PC32DBL;
2621 howto = elf_howto_table + r_type;
2622 relocation = h->root.u.def.value
2623 + h->root.u.def.section->output_section->vma
2624 + h->root.u.def.section->output_offset;
2629 unresolved_reloc = FALSE;
2633 if (local_got_offsets == NULL)
2636 off = local_got_offsets[r_symndx];
2638 /* The offset must always be a multiple of 4. We use
2639 the least significant bit to record whether we have
2640 already generated the necessary reloc. */
2645 bfd_put_32 (output_bfd, relocation,
2646 htab->elf.sgot->contents + off);
2648 if (bfd_link_pic (info))
2651 Elf_Internal_Rela outrel;
2654 srelgot = htab->elf.srelgot;
2655 if (srelgot == NULL)
2658 outrel.r_offset = (htab->elf.sgot->output_section->vma
2659 + htab->elf.sgot->output_offset
2661 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2662 outrel.r_addend = relocation;
2663 loc = srelgot->contents;
2664 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2665 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2668 local_got_offsets[r_symndx] |= 1;
2672 if (off >= (bfd_vma) -2)
2675 relocation = base_got->output_offset + off;
2677 /* For @GOTENT the relocation is against the offset between
2678 the instruction and the symbols entry in the GOT and not
2679 between the start of the GOT and the symbols entry. We
2680 add the vma of the GOT to get the correct value. */
2681 if ( r_type == R_390_GOTENT
2682 || r_type == R_390_GOTPLTENT)
2683 relocation += base_got->output_section->vma;
2687 case R_390_GOTOFF16:
2688 case R_390_GOTOFF32:
2689 /* Relocation is relative to the start of the global offset
2693 && s390_is_ifunc_symbol_p (h)
2695 && !bfd_link_executable (info))
2697 relocation = (htab->elf.iplt->output_section->vma
2698 + htab->elf.iplt->output_offset
2700 - htab->elf.sgot->output_section->vma);
2704 /* Note that sgot->output_offset is not involved in this
2705 calculation. We always want the start of .got. If we
2706 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2707 permitted by the ABI, we might have to change this
2709 relocation -= htab->elf.sgot->output_section->vma;
2713 case R_390_GOTPCDBL:
2714 /* Use global offset table as symbol value. */
2715 relocation = htab->elf.sgot->output_section->vma;
2716 unresolved_reloc = FALSE;
2719 case R_390_PLT12DBL:
2720 case R_390_PLT16DBL:
2721 case R_390_PLT24DBL:
2722 case R_390_PLT32DBL:
2724 /* Relocation is to the entry for this symbol in the
2725 procedure linkage table. */
2727 /* Resolve a PLT32 reloc against a local symbol directly,
2728 without using the procedure linkage table. */
2732 if (h->plt.offset == (bfd_vma) -1
2733 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2735 /* We didn't make a PLT entry for this symbol. This
2736 happens when statically linking PIC code, or when
2737 using -Bsymbolic. */
2741 if (s390_is_ifunc_symbol_p (h))
2742 relocation = (htab->elf.iplt->output_section->vma
2743 + htab->elf.iplt->output_offset
2746 relocation = (htab->elf.splt->output_section->vma
2747 + htab->elf.splt->output_offset
2749 unresolved_reloc = FALSE;
2752 case R_390_PLTOFF16:
2753 case R_390_PLTOFF32:
2754 /* Relocation is to the entry for this symbol in the
2755 procedure linkage table relative to the start of the GOT. */
2757 /* For local symbols or if we didn't make a PLT entry for
2758 this symbol resolve the symbol directly. */
2760 || h->plt.offset == (bfd_vma) -1
2761 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2763 relocation -= htab->elf.sgot->output_section->vma;
2767 if (s390_is_ifunc_symbol_p (h))
2768 relocation = (htab->elf.iplt->output_section->vma
2769 + htab->elf.iplt->output_offset
2771 - htab->elf.sgot->output_section->vma);
2773 relocation = (htab->elf.splt->output_section->vma
2774 + htab->elf.splt->output_offset
2776 - htab->elf.sgot->output_section->vma);
2777 unresolved_reloc = FALSE;
2787 && s390_is_ifunc_symbol_p (h)
2789 && !bfd_link_executable (info))
2791 /* This will not work our if the function does not
2792 happen to set up the GOT pointer for some other
2793 reason. 31 bit PLT entries require r12 to hold the
2795 FIXME: Implement an errorcheck.
2796 NOTE: It will work when brasl is not available
2797 (e.g. with -m31 -march=g5) since a local function
2798 call then does use GOTOFF which implies r12 being set
2800 relocation = (htab->elf.iplt->output_section->vma
2801 + htab->elf.iplt->output_offset
2810 && s390_is_ifunc_symbol_p (h)
2813 if (!bfd_link_pic (info) || !h->non_got_ref)
2815 /* For a non-shared object STT_GNU_IFUNC symbol must
2817 relocation = (htab->elf.iplt->output_section->vma
2818 + htab->elf.iplt->output_offset
2824 /* For shared objects a runtime relocation is needed. */
2826 Elf_Internal_Rela outrel;
2829 /* Need a dynamic relocation to get the real function
2831 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2835 if (outrel.r_offset == (bfd_vma) -1
2836 || outrel.r_offset == (bfd_vma) -2)
2839 outrel.r_offset += (input_section->output_section->vma
2840 + input_section->output_offset);
2842 if (h->dynindx == -1
2844 || bfd_link_executable (info))
2846 /* This symbol is resolved locally. */
2847 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2848 outrel.r_addend = (h->root.u.def.value
2849 + h->root.u.def.section->output_section->vma
2850 + h->root.u.def.section->output_offset);
2854 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2855 outrel.r_addend = 0;
2858 sreloc = htab->elf.irelifunc;
2859 elf_append_rela (output_bfd, sreloc, &outrel);
2861 /* If this reloc is against an external symbol, we
2862 do not want to fiddle with the addend. Otherwise,
2863 we need to include the symbol value so that it
2864 becomes an addend for the dynamic reloc. For an
2865 internal symbol, we have updated addend. */
2870 if ((input_section->flags & SEC_ALLOC) == 0)
2873 if ((bfd_link_pic (info)
2875 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2876 || h->root.type != bfd_link_hash_undefweak)
2877 && ((r_type != R_390_PC16
2878 && r_type != R_390_PC12DBL
2879 && r_type != R_390_PC16DBL
2880 && r_type != R_390_PC24DBL
2881 && r_type != R_390_PC32DBL
2882 && r_type != R_390_PC32)
2883 || !SYMBOL_CALLS_LOCAL (info, h)))
2884 || (ELIMINATE_COPY_RELOCS
2885 && !bfd_link_pic (info)
2891 || h->root.type == bfd_link_hash_undefweak
2892 || h->root.type == bfd_link_hash_undefined)))
2894 Elf_Internal_Rela outrel;
2895 bfd_boolean skip, relocate;
2899 /* When generating a shared object, these relocations
2900 are copied into the output file to be resolved at run
2907 _bfd_elf_section_offset (output_bfd, info, input_section,
2909 if (outrel.r_offset == (bfd_vma) -1)
2911 else if (outrel.r_offset == (bfd_vma) -2)
2912 skip = TRUE, relocate = TRUE;
2913 outrel.r_offset += (input_section->output_section->vma
2914 + input_section->output_offset);
2917 memset (&outrel, 0, sizeof outrel);
2920 && (r_type == R_390_PC16
2921 || r_type == R_390_PC12DBL
2922 || r_type == R_390_PC16DBL
2923 || r_type == R_390_PC24DBL
2924 || r_type == R_390_PC32DBL
2925 || r_type == R_390_PC32
2926 || !bfd_link_pic (info)
2927 || !SYMBOLIC_BIND (info, h)
2928 || !h->def_regular))
2930 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2931 outrel.r_addend = rel->r_addend;
2935 /* This symbol is local, or marked to become local. */
2936 outrel.r_addend = relocation + rel->r_addend;
2937 if (r_type == R_390_32)
2940 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2946 if (bfd_is_abs_section (sec))
2948 else if (sec == NULL || sec->owner == NULL)
2950 bfd_set_error(bfd_error_bad_value);
2957 osec = sec->output_section;
2958 sindx = elf_section_data (osec)->dynindx;
2961 osec = htab->elf.text_index_section;
2962 sindx = elf_section_data (osec)->dynindx;
2964 BFD_ASSERT (sindx != 0);
2966 /* We are turning this relocation into one
2967 against a section symbol, so subtract out
2968 the output section's address but not the
2969 offset of the input section in the output
2971 outrel.r_addend -= osec->vma;
2973 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2977 sreloc = elf_section_data (input_section)->sreloc;
2981 loc = sreloc->contents;
2982 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2983 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2985 /* If this reloc is against an external symbol, we do
2986 not want to fiddle with the addend. Otherwise, we
2987 need to include the symbol value so that it becomes
2988 an addend for the dynamic reloc. */
2994 /* Relocations for tls literal pool entries. */
2995 case R_390_TLS_IE32:
2996 if (bfd_link_pic (info))
2998 Elf_Internal_Rela outrel;
3002 outrel.r_offset = rel->r_offset
3003 + input_section->output_section->vma
3004 + input_section->output_offset;
3005 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3006 sreloc = elf_section_data (input_section)->sreloc;
3009 loc = sreloc->contents;
3010 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3011 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3015 case R_390_TLS_GD32:
3016 case R_390_TLS_GOTIE32:
3017 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
3018 tls_type = GOT_UNKNOWN;
3019 if (h == NULL && local_got_offsets)
3020 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3023 tls_type = elf_s390_hash_entry(h)->tls_type;
3024 if (!bfd_link_pic (info)
3026 && tls_type >= GOT_TLS_IE)
3027 r_type = R_390_TLS_LE32;
3029 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
3030 r_type = R_390_TLS_IE32;
3032 if (r_type == R_390_TLS_LE32)
3034 /* This relocation gets optimized away by the local exec
3035 access optimization. */
3036 BFD_ASSERT (! unresolved_reloc);
3037 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3038 contents + rel->r_offset);
3042 if (htab->elf.sgot == NULL)
3046 off = h->got.offset;
3049 if (local_got_offsets == NULL)
3052 off = local_got_offsets[r_symndx];
3061 Elf_Internal_Rela outrel;
3065 if (htab->elf.srelgot == NULL)
3068 outrel.r_offset = (htab->elf.sgot->output_section->vma
3069 + htab->elf.sgot->output_offset + off);
3071 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3072 if (r_type == R_390_TLS_GD32)
3073 dr_type = R_390_TLS_DTPMOD;
3075 dr_type = R_390_TLS_TPOFF;
3076 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3077 outrel.r_addend = relocation - dtpoff_base (info);
3079 outrel.r_addend = 0;
3080 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3081 loc = htab->elf.srelgot->contents;
3082 loc += htab->elf.srelgot->reloc_count++
3083 * sizeof (Elf32_External_Rela);
3084 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3086 if (r_type == R_390_TLS_GD32)
3090 BFD_ASSERT (! unresolved_reloc);
3091 bfd_put_32 (output_bfd,
3092 relocation - dtpoff_base (info),
3093 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3097 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3098 outrel.r_offset += GOT_ENTRY_SIZE;
3099 outrel.r_addend = 0;
3100 htab->elf.srelgot->reloc_count++;
3101 loc += sizeof (Elf32_External_Rela);
3102 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3109 local_got_offsets[r_symndx] |= 1;
3112 if (off >= (bfd_vma) -2)
3114 if (r_type == ELF32_R_TYPE (rel->r_info))
3116 relocation = htab->elf.sgot->output_offset + off;
3117 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3118 relocation += htab->elf.sgot->output_section->vma;
3119 unresolved_reloc = FALSE;
3123 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3124 contents + rel->r_offset);
3129 case R_390_TLS_GOTIE12:
3130 case R_390_TLS_GOTIE20:
3131 case R_390_TLS_IEENT:
3134 if (local_got_offsets == NULL)
3136 off = local_got_offsets[r_symndx];
3137 if (bfd_link_pic (info))
3138 goto emit_tls_relocs;
3142 off = h->got.offset;
3143 tls_type = elf_s390_hash_entry(h)->tls_type;
3144 if (bfd_link_pic (info)
3146 || tls_type < GOT_TLS_IE)
3147 goto emit_tls_relocs;
3150 if (htab->elf.sgot == NULL)
3153 BFD_ASSERT (! unresolved_reloc);
3154 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3155 htab->elf.sgot->contents + off);
3156 relocation = htab->elf.sgot->output_offset + off;
3157 if (r_type == R_390_TLS_IEENT)
3158 relocation += htab->elf.sgot->output_section->vma;
3159 unresolved_reloc = FALSE;
3162 case R_390_TLS_LDM32:
3163 if (! bfd_link_pic (info))
3164 /* The literal pool entry this relocation refers to gets ignored
3165 by the optimized code of the local exec model. Do nothing
3166 and the value will turn out zero. */
3169 if (htab->elf.sgot == NULL)
3172 off = htab->tls_ldm_got.offset;
3177 Elf_Internal_Rela outrel;
3180 if (htab->elf.srelgot == NULL)
3183 outrel.r_offset = (htab->elf.sgot->output_section->vma
3184 + htab->elf.sgot->output_offset + off);
3186 bfd_put_32 (output_bfd, 0,
3187 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3188 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3189 outrel.r_addend = 0;
3190 loc = htab->elf.srelgot->contents;
3191 loc += htab->elf.srelgot->reloc_count++
3192 * sizeof (Elf32_External_Rela);
3193 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3194 htab->tls_ldm_got.offset |= 1;
3196 relocation = htab->elf.sgot->output_offset + off;
3197 unresolved_reloc = FALSE;
3200 case R_390_TLS_LE32:
3201 if (bfd_link_dll (info))
3203 /* Linking a shared library with non-fpic code requires
3204 a R_390_TLS_TPOFF relocation. */
3205 Elf_Internal_Rela outrel;
3210 outrel.r_offset = rel->r_offset
3211 + input_section->output_section->vma
3212 + input_section->output_offset;
3213 if (h != NULL && h->dynindx != -1)
3217 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3219 outrel.r_addend = relocation - dtpoff_base (info);
3221 outrel.r_addend = 0;
3222 sreloc = elf_section_data (input_section)->sreloc;
3225 loc = sreloc->contents;
3226 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3227 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3231 BFD_ASSERT (! unresolved_reloc);
3232 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3233 contents + rel->r_offset);
3237 case R_390_TLS_LDO32:
3238 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3239 relocation -= dtpoff_base (info);
3241 /* When converting LDO to LE, we must negate. */
3242 relocation = -tpoff (info, relocation);
3245 /* Relocations for tls instructions. */
3246 case R_390_TLS_LOAD:
3247 case R_390_TLS_GDCALL:
3248 case R_390_TLS_LDCALL:
3249 tls_type = GOT_UNKNOWN;
3250 if (h == NULL && local_got_offsets)
3251 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3253 tls_type = elf_s390_hash_entry(h)->tls_type;
3255 if (tls_type == GOT_TLS_GD)
3258 if (r_type == R_390_TLS_LOAD)
3260 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3262 /* IE->LE transition. Four valid cases:
3263 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3264 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3265 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3266 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3267 unsigned int insn, ry;
3269 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3271 if ((insn & 0xff00f000) == 0x58000000)
3272 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3273 ry = (insn & 0x000f0000);
3274 else if ((insn & 0xff0f0000) == 0x58000000)
3275 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3276 ry = (insn & 0x0000f000) << 4;
3277 else if ((insn & 0xff00f000) == 0x5800c000)
3278 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3279 ry = (insn & 0x000f0000);
3280 else if ((insn & 0xff0f0000) == 0x580c0000)
3281 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3282 ry = (insn & 0x0000f000) << 4;
3284 invalid_tls_insn (input_bfd, input_section, rel);
3285 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3286 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3289 else if (r_type == R_390_TLS_GDCALL)
3293 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3294 if ((insn & 0xff000fff) != 0x4d000000 &&
3295 (insn & 0xffff0000) != 0xc0e50000 &&
3296 (insn & 0xff000000) != 0x0d000000)
3297 invalid_tls_insn (input_bfd, input_section, rel);
3298 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3300 if ((insn & 0xff000000) == 0x0d000000)
3302 /* GD->LE transition.
3303 basr rx, ry -> nopr r7 */
3304 insn = 0x07070000 | (insn & 0xffff);
3306 else if ((insn & 0xff000000) == 0x4d000000)
3308 /* GD->LE transition.
3309 bas %r14,0(%rx,%r13) -> bc 0,0 */
3314 /* GD->LE transition.
3315 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3317 bfd_put_16 (output_bfd, 0x0000,
3318 contents + rel->r_offset + 4);
3323 /* If basr is used in the pic case to invoke
3324 _tls_get_offset, something went wrong before. */
3325 if ((insn & 0xff000000) == 0x0d000000)
3326 invalid_tls_insn (input_bfd, input_section, rel);
3328 if ((insn & 0xff000000) == 0x4d000000)
3330 /* GD->IE transition.
3331 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3336 /* GD->IE transition.
3337 brasl %r14,__tls_get_addr@plt ->
3338 l %r2,0(%r2,%r12) ; bcr 0,0 */
3340 bfd_put_16 (output_bfd, 0x0700,
3341 contents + rel->r_offset + 4);
3344 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3346 else if (r_type == R_390_TLS_LDCALL)
3348 if (!bfd_link_pic (info))
3352 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3353 if ((insn & 0xff000fff) != 0x4d000000 &&
3354 (insn & 0xffff0000) != 0xc0e50000 &&
3355 (insn & 0xff000000) != 0x0d000000)
3356 invalid_tls_insn (input_bfd, input_section, rel);
3358 if ((insn & 0xff000000) == 0x0d000000)
3360 /* LD->LE transition.
3361 basr rx, ry -> nopr r7 */
3362 insn = 0x07070000 | (insn & 0xffff);
3364 else if ((insn & 0xff000000) == 0x4d000000)
3366 /* LD->LE transition.
3367 bas %r14,0(%rx,%r13) -> bc 0,0 */
3372 /* LD->LE transition.
3373 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3375 bfd_put_16 (output_bfd, 0x0000,
3376 contents + rel->r_offset + 4);
3378 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3387 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3388 because such sections are not SEC_ALLOC and thus ld.so will
3389 not process them. */
3390 if (unresolved_reloc
3391 && !((input_section->flags & SEC_DEBUGGING) != 0
3393 && _bfd_elf_section_offset (output_bfd, info, input_section,
3394 rel->r_offset) != (bfd_vma) -1)
3395 (*_bfd_error_handler)
3396 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3399 (long) rel->r_offset,
3401 h->root.root.string);
3405 /* When applying a 24 bit reloc we need to start one byte
3406 earlier. Otherwise the 32 bit get/put bfd operations might
3407 access a byte after the actual section. */
3408 if (r_type == R_390_PC24DBL
3409 || r_type == R_390_PLT24DBL)
3412 if (r_type == R_390_20
3413 || r_type == R_390_GOT20
3414 || r_type == R_390_GOTPLT20
3415 || r_type == R_390_TLS_GOTIE20)
3417 relocation += rel->r_addend;
3418 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3419 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3420 contents, rel->r_offset,
3424 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3425 contents, rel->r_offset,
3426 relocation, rel->r_addend);
3428 if (r != bfd_reloc_ok)
3433 name = h->root.root.string;
3436 name = bfd_elf_string_from_elf_section (input_bfd,
3437 symtab_hdr->sh_link,
3442 name = bfd_section_name (input_bfd, sec);
3445 if (r == bfd_reloc_overflow)
3446 (*info->callbacks->reloc_overflow)
3447 (info, (h ? &h->root : NULL), name, howto->name,
3448 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3451 (*_bfd_error_handler)
3452 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3453 input_bfd, input_section,
3454 (long) rel->r_offset, name, (int) r);
3463 /* Generate the PLT slots together with the dynamic relocations needed
3464 for IFUNC symbols. */
3467 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3468 struct bfd_link_info *info,
3469 struct elf_link_hash_entry *h,
3470 struct elf_s390_link_hash_table *htab,
3471 bfd_vma iplt_offset,
3472 bfd_vma resolver_address)
3476 bfd_vma igotiplt_offset;
3477 Elf_Internal_Rela rela;
3479 asection *plt, *gotplt, *relplt;
3480 bfd_vma relative_offset;
3482 if (htab->elf.iplt == NULL
3483 || htab->elf.igotplt == NULL
3484 || htab->elf.irelplt == NULL)
3487 gotplt = htab->elf.igotplt;
3488 relplt = htab->elf.irelplt;
3490 /* Index of the PLT slot within iplt section. */
3491 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3492 plt = htab->elf.iplt;
3493 /* Offset into the igot.plt section. */
3494 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3495 /* Offset into the got section. */
3496 got_offset = igotiplt_offset + gotplt->output_offset;
3498 /* S390 uses halfwords for relative branch calc! */
3499 relative_offset = - (plt->output_offset +
3500 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3501 /* If offset is > 32768, branch to a previous branch
3502 390 can only handle +-64 K jumps. */
3503 if ( -32768 > (int) relative_offset )
3505 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3507 /* Fill in the entry in the procedure linkage table. */
3508 if (!bfd_link_pic (info))
3510 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3513 /* Adjust jump to the first plt entry. */
3514 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3515 plt->contents + iplt_offset + 20);
3517 /* Push the GOT offset field. */
3518 bfd_put_32 (output_bfd,
3519 (gotplt->output_section->vma
3521 plt->contents + iplt_offset + 24);
3523 else if (got_offset < 4096)
3525 /* The GOT offset is small enough to be used directly as
3527 memcpy (plt->contents + iplt_offset,
3528 elf_s390_plt_pic12_entry,
3531 /* Put in the GOT offset as displacement value. The 0xc000
3532 value comes from the first word of the plt entry. Look
3533 at the elf_s390_plt_pic16_entry content. */
3534 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3535 plt->contents + iplt_offset + 2);
3537 /* Adjust the jump to the first plt entry. */
3538 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3539 plt->contents + iplt_offset + 20);
3541 else if (got_offset < 32768)
3543 /* The GOT offset is too big for a displacement but small
3544 enough to be a signed 16 bit immediate value as it can be
3545 used in an lhi instruction. */
3546 memcpy (plt->contents + iplt_offset,
3547 elf_s390_plt_pic16_entry,
3550 /* Put in the GOT offset for the lhi instruction. */
3551 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3552 plt->contents + iplt_offset + 2);
3554 /* Adjust the jump to the first plt entry. */
3555 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3556 plt->contents + iplt_offset + 20);
3560 memcpy (plt->contents + iplt_offset,
3561 elf_s390_plt_pic_entry,
3564 /* Adjust the jump to the first plt entry. */
3565 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3566 plt->contents + iplt_offset + 20);
3568 /* Push the GOT offset field. */
3569 bfd_put_32 (output_bfd, got_offset,
3570 plt->contents + iplt_offset + 24);
3572 /* Insert offset into reloc. table here. */
3573 bfd_put_32 (output_bfd, relplt->output_offset +
3574 iplt_index * RELA_ENTRY_SIZE,
3575 plt->contents + iplt_offset + 28);
3577 /* Fill in the entry in the global offset table.
3578 Points to instruction after GOT offset. */
3579 bfd_put_32 (output_bfd,
3580 (plt->output_section->vma
3581 + plt->output_offset
3584 gotplt->contents + igotiplt_offset);
3586 /* Fill in the entry in the .rela.plt section. */
3587 rela.r_offset = gotplt->output_section->vma + got_offset;
3591 || ((bfd_link_executable (info)
3592 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3595 /* The symbol can be locally resolved. */
3596 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3597 rela.r_addend = resolver_address;
3601 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3605 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3606 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3609 /* Finish up dynamic symbol handling. We set the contents of various
3610 dynamic sections here. */
3613 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3614 struct bfd_link_info *info,
3615 struct elf_link_hash_entry *h,
3616 Elf_Internal_Sym *sym)
3618 struct elf_s390_link_hash_table *htab;
3619 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3621 htab = elf_s390_hash_table (info);
3623 if (h->plt.offset != (bfd_vma) -1)
3627 Elf_Internal_Rela rela;
3629 bfd_vma relative_offset;
3631 /* This symbol has an entry in the procedure linkage table. Set
3633 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3635 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3636 htab, h->plt.offset,
3637 eh->ifunc_resolver_address +
3638 eh->ifunc_resolver_section->output_offset +
3639 eh->ifunc_resolver_section->output_section->vma);
3640 /* Do not return yet. Handling of explicit GOT slots of
3641 IFUNC symbols is below. */
3645 if (h->dynindx == -1
3646 || htab->elf.splt == NULL
3647 || htab->elf.sgotplt == NULL
3648 || htab->elf.srelplt == NULL)
3652 Current offset - size first entry / entry size. */
3653 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3655 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3657 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3659 /* S390 uses halfwords for relative branch calc! */
3660 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3661 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3662 /* If offset is > 32768, branch to a previous branch
3663 390 can only handle +-64 K jumps. */
3664 if ( -32768 > (int) relative_offset )
3666 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3668 /* Fill in the entry in the procedure linkage table. */
3669 if (!bfd_link_pic (info))
3671 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3674 /* Adjust jump to the first plt entry. */
3675 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3676 htab->elf.splt->contents + h->plt.offset + 20);
3678 /* Push the GOT offset field. */
3679 bfd_put_32 (output_bfd,
3680 (htab->elf.sgotplt->output_section->vma
3681 + htab->elf.sgotplt->output_offset
3683 htab->elf.splt->contents + h->plt.offset + 24);
3685 else if (got_offset < 4096)
3687 /* The GOT offset is small enough to be used directly as
3689 memcpy (htab->elf.splt->contents + h->plt.offset,
3690 elf_s390_plt_pic12_entry,
3693 /* Put in the GOT offset as displacement value. The 0xc000
3694 value comes from the first word of the plt entry. Look
3695 at the elf_s390_plt_pic12_entry content. */
3696 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3697 htab->elf.splt->contents + h->plt.offset + 2);
3699 /* Adjust the jump to the first plt entry. */
3700 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3701 htab->elf.splt->contents + h->plt.offset + 20);
3703 else if (got_offset < 32768)
3705 /* The GOT offset is too big for a displacement but small
3706 enough to be a signed 16 bit immediate value as it can be
3707 used in an lhi instruction. */
3708 memcpy (htab->elf.splt->contents + h->plt.offset,
3709 elf_s390_plt_pic16_entry,
3712 /* Put in the GOT offset for the lhi instruction. */
3713 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3714 htab->elf.splt->contents + h->plt.offset + 2);
3716 /* Adjust the jump to the first plt entry. */
3717 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3718 htab->elf.splt->contents + h->plt.offset + 20);
3722 memcpy (htab->elf.splt->contents + h->plt.offset,
3723 elf_s390_plt_pic_entry,
3726 /* Adjust the jump to the first plt entry. */
3727 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3728 htab->elf.splt->contents + h->plt.offset + 20);
3730 /* Push the GOT offset field. */
3731 bfd_put_32 (output_bfd, got_offset,
3732 htab->elf.splt->contents + h->plt.offset + 24);
3734 /* Insert offset into reloc. table here. */
3735 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3736 htab->elf.splt->contents + h->plt.offset + 28);
3738 /* Fill in the entry in the global offset table.
3739 Points to instruction after GOT offset. */
3740 bfd_put_32 (output_bfd,
3741 (htab->elf.splt->output_section->vma
3742 + htab->elf.splt->output_offset
3745 htab->elf.sgotplt->contents + got_offset);
3747 /* Fill in the entry in the .rela.plt section. */
3748 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3749 + htab->elf.sgotplt->output_offset
3751 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3753 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3754 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3756 if (!h->def_regular)
3758 /* Mark the symbol as undefined, rather than as defined in
3759 the .plt section. Leave the value alone. This is a clue
3760 for the dynamic linker, to make function pointer
3761 comparisons work between an application and shared
3763 sym->st_shndx = SHN_UNDEF;
3768 if (h->got.offset != (bfd_vma) -1
3769 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3770 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3771 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3773 Elf_Internal_Rela rela;
3776 /* This symbol has an entry in the global offset table. Set it
3779 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3782 rela.r_offset = (htab->elf.sgot->output_section->vma
3783 + htab->elf.sgot->output_offset
3784 + (h->got.offset &~ (bfd_vma) 1));
3786 /* If this is a static link, or it is a -Bsymbolic link and the
3787 symbol is defined locally or was forced to be local because
3788 of a version file, we just want to emit a RELATIVE reloc.
3789 The entry in the global offset table will already have been
3790 initialized in the relocate_section function. */
3791 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3793 if (bfd_link_pic (info))
3795 /* An explicit GOT slot usage needs GLOB_DAT. If the
3796 symbol references local the implicit got.iplt slot
3797 will be used and the IRELATIVE reloc has been created
3803 /* For non-shared objects explicit GOT slots must be
3804 filled with the PLT slot address for pointer
3805 equality reasons. */
3806 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3807 + htab->elf.iplt->output_offset
3809 htab->elf.sgot->contents + h->got.offset);
3813 else if (bfd_link_pic (info)
3814 && SYMBOL_REFERENCES_LOCAL (info, h))
3816 /* If this is a static link, or it is a -Bsymbolic link and
3817 the symbol is defined locally or was forced to be local
3818 because of a version file, we just want to emit a
3819 RELATIVE reloc. The entry in the global offset table
3820 will already have been initialized in the
3821 relocate_section function. */
3822 if (!h->def_regular)
3824 BFD_ASSERT((h->got.offset & 1) != 0);
3825 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3826 rela.r_addend = (h->root.u.def.value
3827 + h->root.u.def.section->output_section->vma
3828 + h->root.u.def.section->output_offset);
3832 BFD_ASSERT((h->got.offset & 1) == 0);
3834 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3835 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3839 loc = htab->elf.srelgot->contents;
3840 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3841 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3846 Elf_Internal_Rela rela;
3849 /* This symbols needs a copy reloc. Set it up. */
3851 if (h->dynindx == -1
3852 || (h->root.type != bfd_link_hash_defined
3853 && h->root.type != bfd_link_hash_defweak)
3854 || htab->srelbss == NULL)
3857 rela.r_offset = (h->root.u.def.value
3858 + h->root.u.def.section->output_section->vma
3859 + h->root.u.def.section->output_offset);
3860 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3862 loc = htab->srelbss->contents;
3863 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3864 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3867 /* Mark some specially defined symbols as absolute. */
3868 if (h == htab->elf.hdynamic
3869 || h == htab->elf.hgot
3870 || h == htab->elf.hplt)
3871 sym->st_shndx = SHN_ABS;
3876 /* Used to decide how to sort relocs in an optimal manner for the
3877 dynamic linker, before writing them out. */
3879 static enum elf_reloc_type_class
3880 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3881 const asection *rel_sec ATTRIBUTE_UNUSED,
3882 const Elf_Internal_Rela *rela)
3884 bfd *abfd = info->output_bfd;
3885 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3886 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3887 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3888 Elf_Internal_Sym sym;
3890 if (htab->elf.dynsym == NULL
3891 || !bed->s->swap_symbol_in (abfd,
3892 (htab->elf.dynsym->contents
3893 + r_symndx * bed->s->sizeof_sym),
3897 /* Check relocation against STT_GNU_IFUNC symbol. */
3898 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3899 return reloc_class_ifunc;
3901 switch ((int) ELF32_R_TYPE (rela->r_info))
3903 case R_390_RELATIVE:
3904 return reloc_class_relative;
3905 case R_390_JMP_SLOT:
3906 return reloc_class_plt;
3908 return reloc_class_copy;
3910 return reloc_class_normal;
3914 /* Finish up the dynamic sections. */
3917 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3918 struct bfd_link_info *info)
3920 struct elf_s390_link_hash_table *htab;
3926 htab = elf_s390_hash_table (info);
3927 dynobj = htab->elf.dynobj;
3928 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3930 if (htab->elf.dynamic_sections_created)
3932 Elf32_External_Dyn *dyncon, *dynconend;
3934 if (sdyn == NULL || htab->elf.sgot == NULL)
3937 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3938 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3939 for (; dyncon < dynconend; dyncon++)
3941 Elf_Internal_Dyn dyn;
3944 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3952 s = htab->elf.sgotplt;
3953 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3957 s = htab->elf.srelplt;
3958 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3962 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3966 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3969 /* Fill in the special first entry in the procedure linkage table. */
3970 if (htab->elf.splt && htab->elf.splt->size > 0)
3972 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3973 if (bfd_link_pic (info))
3975 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3976 PLT_FIRST_ENTRY_SIZE);
3980 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3981 PLT_FIRST_ENTRY_SIZE);
3982 bfd_put_32 (output_bfd,
3983 htab->elf.sgotplt->output_section->vma
3984 + htab->elf.sgotplt->output_offset,
3985 htab->elf.splt->contents + 24);
3987 elf_section_data (htab->elf.splt->output_section)
3988 ->this_hdr.sh_entsize = 4;
3993 if (htab->elf.sgotplt)
3995 /* Fill in the first three entries in the global offset table. */
3996 if (htab->elf.sgotplt->size > 0)
3998 bfd_put_32 (output_bfd,
3999 (sdyn == NULL ? (bfd_vma) 0
4000 : sdyn->output_section->vma + sdyn->output_offset),
4001 htab->elf.sgotplt->contents);
4002 /* One entry for shared object struct ptr. */
4003 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
4004 /* One entry for _dl_runtime_resolve. */
4005 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
4008 elf_section_data (htab->elf.sgotplt->output_section)
4009 ->this_hdr.sh_entsize = 4;
4011 /* Finish dynamic symbol for local IFUNC symbols. */
4012 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4014 struct plt_entry *local_plt;
4015 Elf_Internal_Sym *isym;
4016 Elf_Internal_Shdr *symtab_hdr;
4018 symtab_hdr = &elf_symtab_hdr (ibfd);
4020 local_plt = elf_s390_local_plt (ibfd);
4021 if (local_plt != NULL)
4022 for (i = 0; i < symtab_hdr->sh_info; i++)
4024 if (local_plt[i].plt.offset != (bfd_vma) -1)
4026 asection *sec = local_plt[i].sec;
4027 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
4031 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4032 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
4033 local_plt[i].plt.offset,
4035 + sec->output_section->vma
4036 + sec->output_offset);
4044 /* Support for core dump NOTE sections. */
4047 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
4052 switch (note->descsz)
4057 case 224: /* S/390 Linux. */
4059 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4062 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
4070 /* Make a ".reg/999" section. */
4071 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4072 size, note->descpos + offset);
4076 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
4078 switch (note->descsz)
4083 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
4084 elf_tdata (abfd)->core->pid
4085 = bfd_get_32 (abfd, note->descdata + 12);
4086 elf_tdata (abfd)->core->program
4087 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
4088 elf_tdata (abfd)->core->command
4089 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
4093 /* Note that for some reason, a spurious space is tacked
4094 onto the end of the args in some (at least one anyway)
4095 implementations, so strip it off if it exists. */
4098 char *command = elf_tdata (abfd)->core->command;
4099 int n = strlen (command);
4101 if (0 < n && command[n - 1] == ' ')
4102 command[n - 1] = '\0';
4109 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
4121 char data[124] = { 0 };
4122 const char *fname, *psargs;
4124 va_start (ap, note_type);
4125 fname = va_arg (ap, const char *);
4126 psargs = va_arg (ap, const char *);
4129 strncpy (data + 28, fname, 16);
4130 strncpy (data + 44, psargs, 80);
4131 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4132 &data, sizeof (data));
4137 char data[224] = { 0 };
4142 va_start (ap, note_type);
4143 pid = va_arg (ap, long);
4144 cursig = va_arg (ap, int);
4145 gregs = va_arg (ap, const void *);
4148 bfd_put_16 (abfd, cursig, data + 12);
4149 bfd_put_32 (abfd, pid, data + 24);
4150 memcpy (data + 72, gregs, 144);
4151 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4152 &data, sizeof (data));
4158 /* Return address for Ith PLT stub in section PLT, for relocation REL
4159 or (bfd_vma) -1 if it should not be included. */
4162 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4163 const arelent *rel ATTRIBUTE_UNUSED)
4165 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4168 /* Merge backend specific data from an object file to the output
4169 object file when linking. */
4172 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4174 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4177 if (!elf_s390_merge_obj_attributes (ibfd, obfd))
4180 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4185 #define TARGET_BIG_SYM s390_elf32_vec
4186 #define TARGET_BIG_NAME "elf32-s390"
4187 #define ELF_ARCH bfd_arch_s390
4188 #define ELF_TARGET_ID S390_ELF_DATA
4189 #define ELF_MACHINE_CODE EM_S390
4190 #define ELF_MACHINE_ALT1 EM_S390_OLD
4191 #define ELF_MAXPAGESIZE 0x1000
4193 #define elf_backend_can_gc_sections 1
4194 #define elf_backend_can_refcount 1
4195 #define elf_backend_want_got_plt 1
4196 #define elf_backend_plt_readonly 1
4197 #define elf_backend_want_plt_sym 0
4198 #define elf_backend_got_header_size 12
4199 #define elf_backend_rela_normal 1
4201 #define elf_info_to_howto elf_s390_info_to_howto
4203 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4204 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4205 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4206 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4208 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4210 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4211 #define elf_backend_check_relocs elf_s390_check_relocs
4212 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4213 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4214 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4215 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4216 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4217 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4218 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4219 #define elf_backend_relocate_section elf_s390_relocate_section
4220 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4221 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4222 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4223 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4224 #define elf_backend_write_core_note elf_s390_write_core_note
4225 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4226 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4227 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4229 #define bfd_elf32_mkobject elf_s390_mkobject
4230 #define elf_backend_object_p elf_s390_object_p
4232 #include "elf32-target.h"