1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2017 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 /* xgettext:c-format */
346 _bfd_error_handler (_("%B: invalid relocation type %d"),
350 cache_ptr->howto = &elf_howto_table[r_type];
354 /* A relocation function which doesn't do anything. */
355 static bfd_reloc_status_type
356 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
357 arelent *reloc_entry,
358 asymbol *symbol ATTRIBUTE_UNUSED,
359 void * data ATTRIBUTE_UNUSED,
360 asection *input_section,
362 char **error_message ATTRIBUTE_UNUSED)
365 reloc_entry->address += input_section->output_offset;
369 /* Handle the large displacement relocs. */
370 static bfd_reloc_status_type
371 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
372 arelent *reloc_entry,
374 void * data ATTRIBUTE_UNUSED,
375 asection *input_section,
377 char **error_message ATTRIBUTE_UNUSED)
379 reloc_howto_type *howto = reloc_entry->howto;
383 if (output_bfd != (bfd *) NULL
384 && (symbol->flags & BSF_SECTION_SYM) == 0
385 && (! howto->partial_inplace
386 || reloc_entry->addend == 0))
388 reloc_entry->address += input_section->output_offset;
392 if (output_bfd != NULL)
393 return bfd_reloc_continue;
395 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
396 return bfd_reloc_outofrange;
398 relocation = (symbol->value
399 + symbol->section->output_section->vma
400 + symbol->section->output_offset);
401 relocation += reloc_entry->addend;
402 if (howto->pc_relative)
404 relocation -= (input_section->output_section->vma
405 + input_section->output_offset);
406 relocation -= reloc_entry->address;
409 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
410 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
411 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
413 if ((bfd_signed_vma) relocation < - 0x80000
414 || (bfd_signed_vma) relocation > 0x7ffff)
415 return bfd_reloc_overflow;
421 elf_s390_is_local_label_name (bfd *abfd, const char *name)
423 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
426 return _bfd_elf_is_local_label_name (abfd, name);
429 /* Functions for the 390 ELF linker. */
431 /* The name of the dynamic interpreter. This is put in the .interp
434 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
436 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
437 copying dynamic variables from a shared lib into an app's dynbss
438 section, and instead use a dynamic relocation to point into the
440 #define ELIMINATE_COPY_RELOCS 1
442 /* The size in bytes of the first entry in the procedure linkage table. */
443 #define PLT_FIRST_ENTRY_SIZE 32
444 /* The size in bytes of an entry in the procedure linkage table. */
445 #define PLT_ENTRY_SIZE 32
447 #define GOT_ENTRY_SIZE 4
449 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
451 /* The first three entries in a procedure linkage table are reserved,
452 and the initial contents are unimportant (we zero them out).
453 Subsequent entries look like this. See the SVR4 ABI 386
454 supplement to see how this works. */
456 /* For the s390, simple addr offset can only be 0 - 4096.
457 To use the full 2 GB address space, several instructions
458 are needed to load an address in a register and execute
459 a branch( or just saving the address)
461 Furthermore, only r 0 and 1 are free to use!!! */
463 /* The first 3 words in the GOT are then reserved.
464 Word 0 is the address of the dynamic table.
465 Word 1 is a pointer to a structure describing the object
466 Word 2 is used to point to the loader entry address.
468 The code for position independent PLT entries looks like this:
470 r12 holds addr of the current GOT at entry to the PLT
472 The GOT holds the address in the PLT to be executed.
473 The loader then gets:
474 24(15) = Pointer to the structure describing the object.
475 28(15) = Offset into rela.plt
477 The loader must then find the module where the function is
478 and insert the address in the GOT.
480 Note: 390 can only address +- 64 K relative.
481 We check if offset > 65536, then make a relative branch -64xxx
482 back to a previous defined branch
484 PLT1: BASR 1,0 # 2 bytes
485 L 1,22(1) # 4 bytes Load offset in GOT in r 1
486 L 1,(1,12) # 4 bytes Load address from GOT in r1
487 BCR 15,1 # 2 bytes Jump to address
488 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
489 L 1,14(1) # 4 bytes Load offset in symol table in r1
490 BRC 15,-x # 4 bytes Jump to start of PLT
491 .word 0 # 2 bytes filler
492 .long ? # 4 bytes offset in GOT
493 .long ? # 4 bytes offset into rela.plt
495 This was the general case. There are two additional, optimizes PLT
496 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
497 First the one for GOT offsets < 4096:
499 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
500 BCR 15,1 # 2 bytes Jump to address
501 .word 0,0,0 # 6 bytes filler
502 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
503 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
504 BRC 15,-x # 4 bytes Jump to start of PLT
505 .word 0,0,0 # 6 bytes filler
506 .long ? # 4 bytes offset into rela.plt
508 Second the one for GOT offsets < 32768:
510 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
511 L 1,(1,12) # 4 bytes Load address from GOT to r1
512 BCR 15,1 # 2 bytes Jump to address
513 .word 0 # 2 bytes filler
514 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
515 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
516 BRC 15,-x # 4 bytes Jump to start of PLT
517 .word 0,0,0 # 6 bytes filler
518 .long ? # 4 bytes offset into rela.plt
520 Total = 32 bytes per PLT entry
522 The code for static build PLT entries looks like this:
524 PLT1: BASR 1,0 # 2 bytes
525 L 1,22(1) # 4 bytes Load address of GOT entry
526 L 1,0(0,1) # 4 bytes Load address from GOT in r1
527 BCR 15,1 # 2 bytes Jump to address
528 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
529 L 1,14(1) # 4 bytes Load offset in symbol table in r1
530 BRC 15,-x # 4 bytes Jump to start of PLT
531 .word 0 # 2 bytes filler
532 .long ? # 4 bytes address of GOT entry
533 .long ? # 4 bytes offset into rela.plt */
535 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
537 0x0d, 0x10, /* basr %r1,%r0 */
538 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
539 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
540 0x07, 0xf1, /* br %r1 */
541 0x0d, 0x10, /* basr %r1,%r0 */
542 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
543 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
544 0x00, 0x00, /* padding */
545 0x00, 0x00, 0x00, 0x00, /* GOT offset */
546 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
549 /* Generic PLT pic entry. */
550 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
552 0x0d, 0x10, /* basr %r1,%r0 */
553 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
554 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
555 0x07, 0xf1, /* br %r1 */
556 0x0d, 0x10, /* basr %r1,%r0 */
557 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
558 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
559 0x00, 0x00, /* padding */
560 0x00, 0x00, 0x00, 0x00, /* GOT offset */
561 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
564 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
565 when generating the PLT slot with the GOT offset. */
566 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
568 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
569 0x07, 0xf1, /* br %r1 */
570 0x00, 0x00, 0x00, 0x00, /* padding */
572 0x0d, 0x10, /* basr %r1,%r0 */
573 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
574 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
575 0x00, 0x00, 0x00, 0x00,
576 0x00, 0x00, 0x00, 0x00
579 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
580 when generating the PLT slot with the GOT offset. */
581 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
583 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
584 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
585 0x07, 0xf1, /* br %r1 */
587 0x0d, 0x10, /* basr %r1,%r0 */
588 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
589 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
590 0x00, 0x00, 0x00, 0x00,
591 0x00, 0x00, 0x00, 0x00,
595 /* The first PLT entry pushes the offset into the rela.plt
596 from R1 onto the stack at 8(15) and the loader object info
597 at 12(15), loads the loader address in R1 and jumps to it. */
599 /* The first entry in the PLT for PIC code:
602 ST 1,28(15) # R1 has offset into rela.plt
603 L 1,4(12) # Get loader ino(object struct address)
604 ST 1,24(15) # Store address
605 L 1,8(12) # Entry address of loader in R1
606 BR 1 # Jump to loader
608 The first entry in the PLT for static code:
611 ST 1,28(15) # R1 has offset into rela.plt
613 L 1,18(0,1) # Get address of GOT
614 MVC 24(4,15),4(1) # Move loader ino to stack
615 L 1,8(1) # Get address of loader
616 BR 1 # Jump to loader
618 .long got # address of GOT */
620 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
622 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
623 0x0d, 0x10, /* basr %r1,%r0 */
624 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
625 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
626 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
627 0x07, 0xf1, /* br %r1 */
628 0x00, 0x00, 0x00, 0x00,
629 0x00, 0x00, 0x00, 0x00,
633 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
635 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
636 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
637 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
638 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
639 0x07, 0xf1, /* br %r1 */
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00, 0x00, 0x00,
642 0x00, 0x00, 0x00, 0x00,
647 /* s390 ELF linker hash entry. */
649 struct elf_s390_link_hash_entry
651 struct elf_link_hash_entry elf;
653 /* Track dynamic relocs copied for this symbol. */
654 struct elf_dyn_relocs *dyn_relocs;
656 /* Number of GOTPLT references for a function. */
657 bfd_signed_vma gotplt_refcount;
659 #define GOT_UNKNOWN 0
663 #define GOT_TLS_IE_NLT 4
664 unsigned char tls_type;
666 /* For pointer equality reasons we might need to change the symbol
667 type from STT_GNU_IFUNC to STT_FUNC together with its value and
668 section entry. So after alloc_dynrelocs only these values should
669 be used. In order to check whether a symbol is IFUNC use
670 s390_is_ifunc_symbol_p. */
671 bfd_vma ifunc_resolver_address;
672 asection *ifunc_resolver_section;
675 #define elf_s390_hash_entry(ent) \
676 ((struct elf_s390_link_hash_entry *)(ent))
678 /* This structure represents an entry in the local PLT list needed for
679 local IFUNC symbols. */
682 /* The section of the local symbol.
683 Set in relocate_section and used in finish_dynamic_sections. */
688 bfd_signed_vma refcount;
693 /* NOTE: Keep this structure in sync with
694 the one declared in elf64-s390.c. */
695 struct elf_s390_obj_tdata
697 struct elf_obj_tdata root;
699 /* A local PLT is needed for ifunc symbols. */
700 struct plt_entry *local_plt;
702 /* TLS type for each local got entry. */
703 char *local_got_tls_type;
706 #define elf_s390_tdata(abfd) \
707 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
709 #define elf_s390_local_plt(abfd) \
710 (elf_s390_tdata (abfd)->local_plt)
712 #define elf_s390_local_got_tls_type(abfd) \
713 (elf_s390_tdata (abfd)->local_got_tls_type)
715 #define is_s390_elf(bfd) \
716 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
717 && elf_tdata (bfd) != NULL \
718 && elf_object_id (bfd) == S390_ELF_DATA)
721 elf_s390_mkobject (bfd *abfd)
723 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
728 elf_s390_object_p (bfd *abfd)
730 /* Set the right machine number for an s390 elf32 file. */
731 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
734 /* s390 ELF linker hash table. */
736 struct elf_s390_link_hash_table
738 struct elf_link_hash_table elf;
740 /* Short-cuts to get to dynamic linker sections. */
745 bfd_signed_vma refcount;
749 /* Small local sym cache. */
750 struct sym_cache sym_cache;
753 /* Get the s390 ELF linker hash table from a link_info structure. */
755 #define elf_s390_hash_table(p) \
756 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
757 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
760 #include "elf-s390-common.c"
762 /* Create an entry in an s390 ELF linker hash table. */
764 static struct bfd_hash_entry *
765 link_hash_newfunc (struct bfd_hash_entry *entry,
766 struct bfd_hash_table *table,
769 /* Allocate the structure if it has not already been allocated by a
773 entry = bfd_hash_allocate (table,
774 sizeof (struct elf_s390_link_hash_entry));
779 /* Call the allocation method of the superclass. */
780 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
783 struct elf_s390_link_hash_entry *eh;
785 eh = (struct elf_s390_link_hash_entry *) entry;
786 eh->dyn_relocs = NULL;
787 eh->gotplt_refcount = 0;
788 eh->tls_type = GOT_UNKNOWN;
789 eh->ifunc_resolver_address = 0;
790 eh->ifunc_resolver_section = NULL;
796 /* Create an s390 ELF linker hash table. */
798 static struct bfd_link_hash_table *
799 elf_s390_link_hash_table_create (bfd *abfd)
801 struct elf_s390_link_hash_table *ret;
802 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
809 sizeof (struct elf_s390_link_hash_entry),
816 return &ret->elf.root;
819 /* Copy the extra info we tack onto an elf_link_hash_entry. */
822 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
823 struct elf_link_hash_entry *dir,
824 struct elf_link_hash_entry *ind)
826 struct elf_s390_link_hash_entry *edir, *eind;
828 edir = (struct elf_s390_link_hash_entry *) dir;
829 eind = (struct elf_s390_link_hash_entry *) ind;
831 if (eind->dyn_relocs != NULL)
833 if (edir->dyn_relocs != NULL)
835 struct elf_dyn_relocs **pp;
836 struct elf_dyn_relocs *p;
838 /* Add reloc counts against the indirect sym to the direct sym
839 list. Merge any entries against the same section. */
840 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
842 struct elf_dyn_relocs *q;
844 for (q = edir->dyn_relocs; q != NULL; q = q->next)
845 if (q->sec == p->sec)
847 q->pc_count += p->pc_count;
848 q->count += p->count;
855 *pp = edir->dyn_relocs;
858 edir->dyn_relocs = eind->dyn_relocs;
859 eind->dyn_relocs = NULL;
862 if (ind->root.type == bfd_link_hash_indirect
863 && dir->got.refcount <= 0)
865 edir->tls_type = eind->tls_type;
866 eind->tls_type = GOT_UNKNOWN;
869 if (ELIMINATE_COPY_RELOCS
870 && ind->root.type != bfd_link_hash_indirect
871 && dir->dynamic_adjusted)
873 /* If called to transfer flags for a weakdef during processing
874 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
875 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
876 if (dir->versioned != versioned_hidden)
877 dir->ref_dynamic |= ind->ref_dynamic;
878 dir->ref_regular |= ind->ref_regular;
879 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
880 dir->needs_plt |= ind->needs_plt;
883 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
887 elf_s390_tls_transition (struct bfd_link_info *info,
891 if (bfd_link_pic (info))
899 return R_390_TLS_LE32;
900 return R_390_TLS_IE32;
901 case R_390_TLS_GOTIE32:
903 return R_390_TLS_LE32;
904 return R_390_TLS_GOTIE32;
905 case R_390_TLS_LDM32:
906 return R_390_TLS_LE32;
912 /* Look through the relocs for a section during the first phase, and
913 allocate space in the global offset table or procedure linkage
917 elf_s390_check_relocs (bfd *abfd,
918 struct bfd_link_info *info,
920 const Elf_Internal_Rela *relocs)
922 struct elf_s390_link_hash_table *htab;
923 Elf_Internal_Shdr *symtab_hdr;
924 struct elf_link_hash_entry **sym_hashes;
925 const Elf_Internal_Rela *rel;
926 const Elf_Internal_Rela *rel_end;
928 bfd_signed_vma *local_got_refcounts;
929 int tls_type, old_tls_type;
930 Elf_Internal_Sym *isym;
932 if (bfd_link_relocatable (info))
935 BFD_ASSERT (is_s390_elf (abfd));
937 htab = elf_s390_hash_table (info);
938 symtab_hdr = &elf_symtab_hdr (abfd);
939 sym_hashes = elf_sym_hashes (abfd);
940 local_got_refcounts = elf_local_got_refcounts (abfd);
944 rel_end = relocs + sec->reloc_count;
945 for (rel = relocs; rel < rel_end; rel++)
948 unsigned long r_symndx;
949 struct elf_link_hash_entry *h;
951 r_symndx = ELF32_R_SYM (rel->r_info);
953 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
955 /* xgettext:c-format */
956 _bfd_error_handler (_("%B: bad symbol index: %d"),
961 if (r_symndx < symtab_hdr->sh_info)
963 /* A local symbol. */
964 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
969 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
971 struct plt_entry *plt;
973 if (htab->elf.dynobj == NULL)
974 htab->elf.dynobj = abfd;
976 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
979 if (local_got_refcounts == NULL)
981 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
983 local_got_refcounts = elf_local_got_refcounts (abfd);
985 plt = elf_s390_local_plt (abfd);
986 plt[r_symndx].plt.refcount++;
992 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
993 while (h->root.type == bfd_link_hash_indirect
994 || h->root.type == bfd_link_hash_warning)
995 h = (struct elf_link_hash_entry *) h->root.u.i.link;
997 /* PR15323, ref flags aren't set for references in the same
999 h->root.non_ir_ref_regular = 1;
1002 /* Create got section and local_got_refcounts array if they
1004 r_type = elf_s390_tls_transition (info,
1005 ELF32_R_TYPE (rel->r_info),
1014 case R_390_GOTPLT12:
1015 case R_390_GOTPLT16:
1016 case R_390_GOTPLT20:
1017 case R_390_GOTPLT32:
1018 case R_390_GOTPLTENT:
1019 case R_390_TLS_GD32:
1020 case R_390_TLS_GOTIE12:
1021 case R_390_TLS_GOTIE20:
1022 case R_390_TLS_GOTIE32:
1023 case R_390_TLS_IEENT:
1024 case R_390_TLS_IE32:
1025 case R_390_TLS_LDM32:
1027 && local_got_refcounts == NULL)
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1034 case R_390_GOTOFF16:
1035 case R_390_GOTOFF32:
1037 case R_390_GOTPCDBL:
1038 if (htab->elf.sgot == NULL)
1040 if (htab->elf.dynobj == NULL)
1041 htab->elf.dynobj = abfd;
1042 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1049 if (htab->elf.dynobj == NULL)
1050 htab->elf.dynobj = abfd;
1051 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1054 /* Make sure an IFUNC symbol defined in a non-shared object
1055 always gets a PLT slot. */
1056 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1058 /* The symbol is called by the dynamic loader in order
1059 to resolve the relocation. So it is in fact also
1068 case R_390_GOTPCDBL:
1069 /* These relocs do not need a GOT slot. They just load the
1070 GOT pointer itself or address something else relative to
1071 the GOT. Since the GOT pointer has been set up above we
1074 case R_390_GOTOFF16:
1075 case R_390_GOTOFF32:
1076 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1080 case R_390_PLT12DBL:
1081 case R_390_PLT16DBL:
1082 case R_390_PLT24DBL:
1083 case R_390_PLT32DBL:
1085 case R_390_PLTOFF16:
1086 case R_390_PLTOFF32:
1087 /* This symbol requires a procedure linkage table entry. We
1088 actually build the entry in adjust_dynamic_symbol,
1089 because this might be a case of linking PIC code which is
1090 never referenced by a dynamic object, in which case we
1091 don't need to generate a procedure linkage table entry
1094 /* If this is a local symbol, we resolve it directly without
1095 creating a procedure linkage table entry. */
1099 h->plt.refcount += 1;
1103 case R_390_GOTPLT12:
1104 case R_390_GOTPLT16:
1105 case R_390_GOTPLT20:
1106 case R_390_GOTPLT32:
1107 case R_390_GOTPLTENT:
1108 /* This symbol requires either a procedure linkage table entry
1109 or an entry in the local got. We actually build the entry
1110 in adjust_dynamic_symbol because whether this is really a
1111 global reference can change and with it the fact if we have
1112 to create a plt entry or a local got entry. To be able to
1113 make a once global symbol a local one we have to keep track
1114 of the number of gotplt references that exist for this
1118 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1120 h->plt.refcount += 1;
1123 local_got_refcounts[r_symndx] += 1;
1126 case R_390_TLS_LDM32:
1127 htab->tls_ldm_got.refcount += 1;
1130 case R_390_TLS_IE32:
1131 case R_390_TLS_GOTIE12:
1132 case R_390_TLS_GOTIE20:
1133 case R_390_TLS_GOTIE32:
1134 case R_390_TLS_IEENT:
1135 if (bfd_link_pic (info))
1136 info->flags |= DF_STATIC_TLS;
1144 case R_390_TLS_GD32:
1145 /* This symbol requires a global offset table entry. */
1154 tls_type = GOT_NORMAL;
1156 case R_390_TLS_GD32:
1157 tls_type = GOT_TLS_GD;
1159 case R_390_TLS_IE32:
1160 case R_390_TLS_GOTIE32:
1161 tls_type = GOT_TLS_IE;
1163 case R_390_TLS_GOTIE12:
1164 case R_390_TLS_GOTIE20:
1165 case R_390_TLS_IEENT:
1166 tls_type = GOT_TLS_IE_NLT;
1172 h->got.refcount += 1;
1173 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1177 local_got_refcounts[r_symndx] += 1;
1178 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1180 /* If a TLS symbol is accessed using IE at least once,
1181 there is no point to use dynamic model for it. */
1182 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1184 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1187 /* xgettext:c-format */
1188 (_("%B: `%s' accessed both as normal and thread local symbol"),
1189 abfd, h->root.root.string);
1192 if (old_tls_type > tls_type)
1193 tls_type = old_tls_type;
1196 if (old_tls_type != tls_type)
1199 elf_s390_hash_entry (h)->tls_type = tls_type;
1201 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1204 if (r_type != R_390_TLS_IE32)
1208 case R_390_TLS_LE32:
1209 /* For static linking and executables this reloc will be
1210 calculated at linktime otherwise a TLS_TPOFF runtime
1211 reloc will be generated. */
1212 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1215 if (!bfd_link_pic (info))
1217 info->flags |= DF_STATIC_TLS;
1229 if (h != NULL && bfd_link_executable (info))
1231 /* If this reloc is in a read-only section, we might
1232 need a copy reloc. We can't check reliably at this
1233 stage whether the section is read-only, as input
1234 sections have not yet been mapped to output sections.
1235 Tentatively set the flag for now, and correct in
1236 adjust_dynamic_symbol. */
1239 if (!bfd_link_pic (info))
1241 /* We may need a .plt entry if the function this reloc
1242 refers to is in a shared lib. */
1243 h->plt.refcount += 1;
1247 /* If we are creating a shared library, and this is a reloc
1248 against a global symbol, or a non PC relative reloc
1249 against a local symbol, then we need to copy the reloc
1250 into the shared library. However, if we are linking with
1251 -Bsymbolic, we do not need to copy a reloc against a
1252 global symbol which is defined in an object we are
1253 including in the link (i.e., DEF_REGULAR is set). At
1254 this point we have not seen all the input files, so it is
1255 possible that DEF_REGULAR is not set now but will be set
1256 later (it is never cleared). In case of a weak definition,
1257 DEF_REGULAR may be cleared later by a strong definition in
1258 a shared library. We account for that possibility below by
1259 storing information in the relocs_copied field of the hash
1260 table entry. A similar situation occurs when creating
1261 shared libraries and symbol visibility changes render the
1264 If on the other hand, we are creating an executable, we
1265 may need to keep relocations for symbols satisfied by a
1266 dynamic library if we manage to avoid copy relocs for the
1268 if ((bfd_link_pic (info)
1269 && (sec->flags & SEC_ALLOC) != 0
1270 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1272 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1273 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1274 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1275 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1277 && (! SYMBOLIC_BIND (info, h)
1278 || h->root.type == bfd_link_hash_defweak
1279 || !h->def_regular))))
1280 || (ELIMINATE_COPY_RELOCS
1281 && !bfd_link_pic (info)
1282 && (sec->flags & SEC_ALLOC) != 0
1284 && (h->root.type == bfd_link_hash_defweak
1285 || !h->def_regular)))
1287 struct elf_dyn_relocs *p;
1288 struct elf_dyn_relocs **head;
1290 /* We must copy these reloc types into the output file.
1291 Create a reloc section in dynobj and make room for
1295 if (htab->elf.dynobj == NULL)
1296 htab->elf.dynobj = abfd;
1298 sreloc = _bfd_elf_make_dynamic_reloc_section
1299 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1305 /* If this is a global symbol, we count the number of
1306 relocations we need for this symbol. */
1309 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1313 /* Track dynamic relocs needed for local syms too.
1314 We really need local syms available to do this
1319 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1324 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1328 vpp = &elf_section_data (s)->local_dynrel;
1329 head = (struct elf_dyn_relocs **) vpp;
1333 if (p == NULL || p->sec != sec)
1335 bfd_size_type amt = sizeof *p;
1337 p = ((struct elf_dyn_relocs *)
1338 bfd_alloc (htab->elf.dynobj, amt));
1349 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1353 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1354 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1359 /* This relocation describes the C++ object vtable hierarchy.
1360 Reconstruct it for later use during GC. */
1361 case R_390_GNU_VTINHERIT:
1362 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1366 /* This relocation describes which C++ vtable entries are actually
1367 used. Record for later use during GC. */
1368 case R_390_GNU_VTENTRY:
1369 BFD_ASSERT (h != NULL);
1371 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1383 /* Return the section that should be marked against GC for a given
1387 elf_s390_gc_mark_hook (asection *sec,
1388 struct bfd_link_info *info,
1389 Elf_Internal_Rela *rel,
1390 struct elf_link_hash_entry *h,
1391 Elf_Internal_Sym *sym)
1394 switch (ELF32_R_TYPE (rel->r_info))
1396 case R_390_GNU_VTINHERIT:
1397 case R_390_GNU_VTENTRY:
1400 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1404 /* Update the got entry reference counts for the section being removed. */
1407 elf_s390_gc_sweep_hook (bfd *abfd,
1408 struct bfd_link_info *info,
1410 const Elf_Internal_Rela *relocs)
1412 struct elf_s390_link_hash_table *htab;
1413 Elf_Internal_Shdr *symtab_hdr;
1414 struct elf_link_hash_entry **sym_hashes;
1415 bfd_signed_vma *local_got_refcounts;
1416 const Elf_Internal_Rela *rel, *relend;
1418 if (bfd_link_relocatable (info))
1421 htab = elf_s390_hash_table (info);
1425 elf_section_data (sec)->local_dynrel = NULL;
1427 symtab_hdr = &elf_symtab_hdr (abfd);
1428 sym_hashes = elf_sym_hashes (abfd);
1429 local_got_refcounts = elf_local_got_refcounts (abfd);
1431 relend = relocs + sec->reloc_count;
1432 for (rel = relocs; rel < relend; rel++)
1434 unsigned long r_symndx;
1435 unsigned int r_type;
1436 struct elf_link_hash_entry *h = NULL;
1438 r_symndx = ELF32_R_SYM (rel->r_info);
1439 if (r_symndx >= symtab_hdr->sh_info)
1441 struct elf_s390_link_hash_entry *eh;
1442 struct elf_dyn_relocs **pp;
1443 struct elf_dyn_relocs *p;
1445 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1446 while (h->root.type == bfd_link_hash_indirect
1447 || h->root.type == bfd_link_hash_warning)
1448 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1449 eh = (struct elf_s390_link_hash_entry *) h;
1451 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1454 /* Everything must go for SEC. */
1461 Elf_Internal_Sym *isym;
1463 /* A local symbol. */
1464 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1469 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1471 struct plt_entry *plt = elf_s390_local_plt (abfd);
1472 if (plt[r_symndx].plt.refcount > 0)
1473 plt[r_symndx].plt.refcount--;
1477 r_type = ELF32_R_TYPE (rel->r_info);
1478 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1481 case R_390_TLS_LDM32:
1482 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1483 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1486 case R_390_GOTOFF16:
1487 case R_390_GOTOFF32:
1488 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1495 case R_390_GOTPCDBL:
1498 case R_390_TLS_GD32:
1499 case R_390_TLS_IE32:
1500 case R_390_TLS_GOTIE12:
1501 case R_390_TLS_GOTIE20:
1502 case R_390_TLS_GOTIE32:
1503 case R_390_TLS_IEENT:
1511 if (h->got.refcount > 0)
1512 h->got.refcount -= 1;
1514 else if (local_got_refcounts != NULL)
1516 if (local_got_refcounts[r_symndx] > 0)
1517 local_got_refcounts[r_symndx] -= 1;
1532 if (bfd_link_pic (info))
1536 case R_390_PLT12DBL:
1537 case R_390_PLT16DBL:
1538 case R_390_PLT24DBL:
1539 case R_390_PLT32DBL:
1541 case R_390_PLTOFF16:
1542 case R_390_PLTOFF32:
1545 if (h->plt.refcount > 0)
1546 h->plt.refcount -= 1;
1550 case R_390_GOTPLT12:
1551 case R_390_GOTPLT16:
1552 case R_390_GOTPLT20:
1553 case R_390_GOTPLT32:
1554 case R_390_GOTPLTENT:
1557 if (h->plt.refcount > 0)
1559 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1560 h->plt.refcount -= 1;
1563 else if (local_got_refcounts != NULL)
1565 if (local_got_refcounts[r_symndx] > 0)
1566 local_got_refcounts[r_symndx] -= 1;
1578 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1579 entry but we found we will not create any. Called when we find we will
1580 not have any PLT for this symbol, by for example
1581 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1582 or elf_s390_size_dynamic_sections if no dynamic sections will be
1583 created (we're only linking static objects). */
1586 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1588 if (h->elf.root.type == bfd_link_hash_warning)
1589 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1591 if (h->gotplt_refcount <= 0)
1594 /* We simply add the number of gotplt references to the number
1595 * of got references for this symbol. */
1596 h->elf.got.refcount += h->gotplt_refcount;
1597 h->gotplt_refcount = -1;
1600 /* Adjust a symbol defined by a dynamic object and referenced by a
1601 regular object. The current definition is in some section of the
1602 dynamic object, but we're not including those sections. We have to
1603 change the definition to something the rest of the link can
1607 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1608 struct elf_link_hash_entry *h)
1610 struct elf_s390_link_hash_table *htab;
1613 /* STT_GNU_IFUNC symbol must go through PLT. */
1614 if (s390_is_ifunc_symbol_p (h))
1616 /* All local STT_GNU_IFUNC references must be treated as local
1617 calls via local PLT. */
1618 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1620 bfd_size_type pc_count = 0, count = 0;
1621 struct elf_dyn_relocs **pp;
1622 struct elf_s390_link_hash_entry *eh;
1623 struct elf_dyn_relocs *p;
1625 eh = (struct elf_s390_link_hash_entry *) h;
1626 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1628 pc_count += p->pc_count;
1629 p->count -= p->pc_count;
1638 if (pc_count || count)
1642 if (h->plt.refcount <= 0)
1643 h->plt.refcount = 1;
1645 h->plt.refcount += 1;
1649 if (h->plt.refcount <= 0)
1651 h->plt.offset = (bfd_vma) -1;
1657 /* If this is a function, put it in the procedure linkage table. We
1658 will fill in the contents of the procedure linkage table later
1659 (although we could actually do it here). */
1660 if (h->type == STT_FUNC
1663 if (h->plt.refcount <= 0
1664 || SYMBOL_CALLS_LOCAL (info, h)
1665 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1666 && h->root.type != bfd_link_hash_undefweak))
1668 /* This case can occur if we saw a PLT32 reloc in an input
1669 file, but the symbol was never referred to by a dynamic
1670 object, or if all references were garbage collected. In
1671 such a case, we don't actually need to build a procedure
1672 linkage table, and we can just do a PC32 reloc instead. */
1673 h->plt.offset = (bfd_vma) -1;
1675 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1681 /* It's possible that we incorrectly decided a .plt reloc was
1682 needed for an R_390_PC32 reloc to a non-function sym in
1683 check_relocs. We can't decide accurately between function and
1684 non-function syms in check-relocs; Objects loaded later in
1685 the link may change h->type. So fix it now. */
1686 h->plt.offset = (bfd_vma) -1;
1688 /* If this is a weak symbol, and there is a real definition, the
1689 processor independent code will have arranged for us to see the
1690 real definition first, and we can just use the same value. */
1691 if (h->u.weakdef != NULL)
1693 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1694 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1695 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1696 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1697 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1698 h->non_got_ref = h->u.weakdef->non_got_ref;
1702 /* This is a reference to a symbol defined by a dynamic object which
1703 is not a function. */
1705 /* If we are creating a shared library, we must presume that the
1706 only references to the symbol are via the global offset table.
1707 For such cases we need not do anything here; the relocations will
1708 be handled correctly by relocate_section. */
1709 if (bfd_link_pic (info))
1712 /* If there are no references to this symbol that do not use the
1713 GOT, we don't need to generate a copy reloc. */
1714 if (!h->non_got_ref)
1717 /* If -z nocopyreloc was given, we won't generate them either. */
1718 if (info->nocopyreloc)
1724 if (ELIMINATE_COPY_RELOCS)
1726 struct elf_s390_link_hash_entry * eh;
1727 struct elf_dyn_relocs *p;
1729 eh = (struct elf_s390_link_hash_entry *) h;
1730 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1732 s = p->sec->output_section;
1733 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1737 /* If we didn't find any dynamic relocs in read-only sections, then
1738 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1746 /* We must allocate the symbol in our .dynbss section, which will
1747 become part of the .bss section of the executable. There will be
1748 an entry for this symbol in the .dynsym section. The dynamic
1749 object will contain position independent code, so all references
1750 from the dynamic object to this symbol will go through the global
1751 offset table. The dynamic linker will use the .dynsym entry to
1752 determine the address it must put in the global offset table, so
1753 both the dynamic object and the regular object will refer to the
1754 same memory location for the variable. */
1756 htab = elf_s390_hash_table (info);
1758 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1759 copy the initial value out of the dynamic object and into the
1760 runtime process image. */
1761 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1763 s = htab->elf.sdynrelro;
1764 srel = htab->elf.sreldynrelro;
1768 s = htab->elf.sdynbss;
1769 srel = htab->elf.srelbss;
1771 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1773 srel->size += sizeof (Elf32_External_Rela);
1777 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1780 /* Allocate space in .plt, .got and associated reloc sections for
1784 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1786 struct bfd_link_info *info;
1787 struct elf_s390_link_hash_table *htab;
1788 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1789 struct elf_dyn_relocs *p;
1791 if (h->root.type == bfd_link_hash_indirect)
1794 info = (struct bfd_link_info *) inf;
1795 htab = elf_s390_hash_table (info);
1797 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1798 here if it is defined and referenced in a non-shared object. */
1799 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1800 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1801 else if (htab->elf.dynamic_sections_created
1802 && h->plt.refcount > 0)
1804 /* Make sure this symbol is output as a dynamic symbol.
1805 Undefined weak syms won't yet be marked as dynamic. */
1806 if (h->dynindx == -1
1807 && !h->forced_local)
1809 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1813 if (bfd_link_pic (info)
1814 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1816 asection *s = htab->elf.splt;
1818 /* If this is the first .plt entry, make room for the special
1821 s->size += PLT_FIRST_ENTRY_SIZE;
1823 h->plt.offset = s->size;
1825 /* If this symbol is not defined in a regular file, and we are
1826 not generating a shared library, then set the symbol to this
1827 location in the .plt. This is required to make function
1828 pointers compare as equal between the normal executable and
1829 the shared library. */
1830 if (! bfd_link_pic (info)
1833 h->root.u.def.section = s;
1834 h->root.u.def.value = h->plt.offset;
1837 /* Make room for this entry. */
1838 s->size += PLT_ENTRY_SIZE;
1840 /* We also need to make an entry in the .got.plt section, which
1841 will be placed in the .got section by the linker script. */
1842 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1844 /* We also need to make an entry in the .rela.plt section. */
1845 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1849 h->plt.offset = (bfd_vma) -1;
1851 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1856 h->plt.offset = (bfd_vma) -1;
1858 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1861 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1862 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1863 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1864 we can save the dynamic TLS relocation. */
1865 if (h->got.refcount > 0
1866 && !bfd_link_pic (info)
1868 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1870 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1871 /* For the GOTIE access without a literal pool entry the offset has
1872 to be stored somewhere. The immediate value in the instruction
1873 is not bit enough so the value is stored in the got. */
1875 h->got.offset = htab->elf.sgot->size;
1876 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1879 h->got.offset = (bfd_vma) -1;
1881 else if (h->got.refcount > 0)
1885 int tls_type = elf_s390_hash_entry(h)->tls_type;
1887 /* Make sure this symbol is output as a dynamic symbol.
1888 Undefined weak syms won't yet be marked as dynamic. */
1889 if (h->dynindx == -1
1890 && !h->forced_local)
1892 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1897 h->got.offset = s->size;
1898 s->size += GOT_ENTRY_SIZE;
1899 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1900 if (tls_type == GOT_TLS_GD)
1901 s->size += GOT_ENTRY_SIZE;
1902 dyn = htab->elf.dynamic_sections_created;
1903 /* R_390_TLS_IE32 needs one dynamic relocation,
1904 R_390_TLS_GD32 needs one if local symbol and two if global. */
1905 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1906 || tls_type >= GOT_TLS_IE)
1907 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1908 else if (tls_type == GOT_TLS_GD)
1909 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1910 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1911 || h->root.type != bfd_link_hash_undefweak)
1912 && (bfd_link_pic (info)
1913 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1914 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1917 h->got.offset = (bfd_vma) -1;
1919 if (eh->dyn_relocs == NULL)
1922 /* In the shared -Bsymbolic case, discard space allocated for
1923 dynamic pc-relative relocs against symbols which turn out to be
1924 defined in regular objects. For the normal shared case, discard
1925 space for pc-relative relocs that have become local due to symbol
1926 visibility changes. */
1928 if (bfd_link_pic (info))
1930 if (SYMBOL_CALLS_LOCAL (info, h))
1932 struct elf_dyn_relocs **pp;
1934 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1936 p->count -= p->pc_count;
1945 /* Also discard relocs on undefined weak syms with non-default
1947 if (eh->dyn_relocs != NULL
1948 && h->root.type == bfd_link_hash_undefweak)
1950 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1951 eh->dyn_relocs = NULL;
1953 /* Make sure undefined weak symbols are output as a dynamic
1955 else if (h->dynindx == -1
1956 && !h->forced_local)
1958 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1963 else if (ELIMINATE_COPY_RELOCS)
1965 /* For the non-shared case, discard space for relocs against
1966 symbols which turn out to need copy relocs or are not
1972 || (htab->elf.dynamic_sections_created
1973 && (h->root.type == bfd_link_hash_undefweak
1974 || h->root.type == bfd_link_hash_undefined))))
1976 /* Make sure this symbol is output as a dynamic symbol.
1977 Undefined weak syms won't yet be marked as dynamic. */
1978 if (h->dynindx == -1
1979 && !h->forced_local)
1981 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1985 /* If that succeeded, we know we'll be keeping all the
1987 if (h->dynindx != -1)
1991 eh->dyn_relocs = NULL;
1996 /* Finally, allocate space. */
1997 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1999 asection *sreloc = elf_section_data (p->sec)->sreloc;
2001 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2007 /* Find any dynamic relocs that apply to read-only sections. */
2010 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2012 struct elf_s390_link_hash_entry *eh;
2013 struct elf_dyn_relocs *p;
2015 eh = (struct elf_s390_link_hash_entry *) h;
2016 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2018 asection *s = p->sec->output_section;
2020 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2022 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2024 info->flags |= DF_TEXTREL;
2026 /* Not an error, just cut short the traversal. */
2033 /* Set the sizes of the dynamic sections. */
2036 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2037 struct bfd_link_info *info)
2039 struct elf_s390_link_hash_table *htab;
2045 htab = elf_s390_hash_table (info);
2046 dynobj = htab->elf.dynobj;
2050 if (htab->elf.dynamic_sections_created)
2052 /* Set the contents of the .interp section to the interpreter. */
2053 if (bfd_link_executable (info) && !info->nointerp)
2055 s = bfd_get_linker_section (dynobj, ".interp");
2058 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2059 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2063 /* Set up .got offsets for local syms, and space for local dynamic
2065 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2067 bfd_signed_vma *local_got;
2068 bfd_signed_vma *end_local_got;
2069 char *local_tls_type;
2070 bfd_size_type locsymcount;
2071 Elf_Internal_Shdr *symtab_hdr;
2073 struct plt_entry *local_plt;
2076 if (! is_s390_elf (ibfd))
2079 for (s = ibfd->sections; s != NULL; s = s->next)
2081 struct elf_dyn_relocs *p;
2083 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2085 if (!bfd_is_abs_section (p->sec)
2086 && bfd_is_abs_section (p->sec->output_section))
2088 /* Input section has been discarded, either because
2089 it is a copy of a linkonce section or due to
2090 linker script /DISCARD/, so we'll be discarding
2093 else if (p->count != 0)
2095 srela = elf_section_data (p->sec)->sreloc;
2096 srela->size += p->count * sizeof (Elf32_External_Rela);
2097 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2098 info->flags |= DF_TEXTREL;
2103 local_got = elf_local_got_refcounts (ibfd);
2107 symtab_hdr = &elf_symtab_hdr (ibfd);
2108 locsymcount = symtab_hdr->sh_info;
2109 end_local_got = local_got + locsymcount;
2110 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2112 srela = htab->elf.srelgot;
2113 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2117 *local_got = s->size;
2118 s->size += GOT_ENTRY_SIZE;
2119 if (*local_tls_type == GOT_TLS_GD)
2120 s->size += GOT_ENTRY_SIZE;
2121 if (bfd_link_pic (info))
2122 srela->size += sizeof (Elf32_External_Rela);
2125 *local_got = (bfd_vma) -1;
2127 local_plt = elf_s390_local_plt (ibfd);
2128 for (i = 0; i < symtab_hdr->sh_info; i++)
2130 if (local_plt[i].plt.refcount > 0)
2132 local_plt[i].plt.offset = htab->elf.iplt->size;
2133 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2134 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2135 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2138 local_plt[i].plt.offset = (bfd_vma) -1;
2142 if (htab->tls_ldm_got.refcount > 0)
2144 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2146 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2147 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2148 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2151 htab->tls_ldm_got.offset = -1;
2153 /* Allocate global sym .plt and .got entries, and space for global
2154 sym dynamic relocs. */
2155 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2157 /* We now have determined the sizes of the various dynamic sections.
2158 Allocate memory for them. */
2160 for (s = dynobj->sections; s != NULL; s = s->next)
2162 if ((s->flags & SEC_LINKER_CREATED) == 0)
2165 if (s == htab->elf.splt
2166 || s == htab->elf.sgot
2167 || s == htab->elf.sgotplt
2168 || s == htab->elf.sdynbss
2169 || s == htab->elf.sdynrelro
2170 || s == htab->elf.iplt
2171 || s == htab->elf.igotplt
2172 || s == htab->irelifunc)
2174 /* Strip this section if we don't need it; see the
2177 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2182 /* We use the reloc_count field as a counter if we need
2183 to copy relocs into the output file. */
2188 /* It's not one of our sections, so don't allocate space. */
2194 /* If we don't need this section, strip it from the
2195 output file. This is to handle .rela.bss and
2196 .rela.plt. We must create it in
2197 create_dynamic_sections, because it must be created
2198 before the linker maps input sections to output
2199 sections. The linker does that before
2200 adjust_dynamic_symbol is called, and it is that
2201 function which decides whether anything needs to go
2202 into these sections. */
2204 s->flags |= SEC_EXCLUDE;
2208 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2211 /* Allocate memory for the section contents. We use bfd_zalloc
2212 here in case unused entries are not reclaimed before the
2213 section's contents are written out. This should not happen,
2214 but this way if it does, we get a R_390_NONE reloc instead
2216 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2217 if (s->contents == NULL)
2221 if (htab->elf.dynamic_sections_created)
2223 /* Add some entries to the .dynamic section. We fill in the
2224 values later, in elf_s390_finish_dynamic_sections, but we
2225 must add the entries now so that we get the correct size for
2226 the .dynamic section. The DT_DEBUG entry is filled in by the
2227 dynamic linker and used by the debugger. */
2228 #define add_dynamic_entry(TAG, VAL) \
2229 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2231 if (bfd_link_executable (info))
2233 if (!add_dynamic_entry (DT_DEBUG, 0))
2237 if (htab->elf.splt->size != 0)
2239 if (!add_dynamic_entry (DT_PLTGOT, 0)
2240 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2241 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2242 || !add_dynamic_entry (DT_JMPREL, 0))
2248 if (!add_dynamic_entry (DT_RELA, 0)
2249 || !add_dynamic_entry (DT_RELASZ, 0)
2250 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2253 /* If any dynamic relocs apply to a read-only section,
2254 then we need a DT_TEXTREL entry. */
2255 if ((info->flags & DF_TEXTREL) == 0)
2256 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2258 if ((info->flags & DF_TEXTREL) != 0)
2260 if (!add_dynamic_entry (DT_TEXTREL, 0))
2265 #undef add_dynamic_entry
2270 /* Return the base VMA address which should be subtracted from real addresses
2271 when resolving @dtpoff relocation.
2272 This is PT_TLS segment p_vaddr. */
2275 dtpoff_base (struct bfd_link_info *info)
2277 /* If tls_sec is NULL, we should have signalled an error already. */
2278 if (elf_hash_table (info)->tls_sec == NULL)
2280 return elf_hash_table (info)->tls_sec->vma;
2283 /* Return the relocation value for @tpoff relocation
2284 if STT_TLS virtual address is ADDRESS. */
2287 tpoff (struct bfd_link_info *info, bfd_vma address)
2289 struct elf_link_hash_table *htab = elf_hash_table (info);
2291 /* If tls_sec is NULL, we should have signalled an error already. */
2292 if (htab->tls_sec == NULL)
2294 return htab->tls_size + htab->tls_sec->vma - address;
2297 /* Complain if TLS instruction relocation is against an invalid
2301 invalid_tls_insn (bfd *input_bfd,
2302 asection *input_section,
2303 Elf_Internal_Rela *rel)
2305 reloc_howto_type *howto;
2307 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2309 /* xgettext:c-format */
2310 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2313 (long) rel->r_offset,
2315 bfd_set_error (bfd_error_bad_value);
2318 /* Relocate a 390 ELF section. */
2321 elf_s390_relocate_section (bfd *output_bfd,
2322 struct bfd_link_info *info,
2324 asection *input_section,
2326 Elf_Internal_Rela *relocs,
2327 Elf_Internal_Sym *local_syms,
2328 asection **local_sections)
2330 struct elf_s390_link_hash_table *htab;
2331 Elf_Internal_Shdr *symtab_hdr;
2332 struct elf_link_hash_entry **sym_hashes;
2333 bfd_vma *local_got_offsets;
2334 Elf_Internal_Rela *rel;
2335 Elf_Internal_Rela *relend;
2337 BFD_ASSERT (is_s390_elf (input_bfd));
2339 htab = elf_s390_hash_table (info);
2340 symtab_hdr = &elf_symtab_hdr (input_bfd);
2341 sym_hashes = elf_sym_hashes (input_bfd);
2342 local_got_offsets = elf_local_got_offsets (input_bfd);
2345 relend = relocs + input_section->reloc_count;
2346 for (; rel < relend; rel++)
2348 unsigned int r_type;
2349 reloc_howto_type *howto;
2350 unsigned long r_symndx;
2351 struct elf_link_hash_entry *h;
2352 Elf_Internal_Sym *sym;
2356 bfd_boolean unresolved_reloc;
2357 bfd_reloc_status_type r;
2359 asection *base_got = htab->elf.sgot;
2361 r_type = ELF32_R_TYPE (rel->r_info);
2362 if (r_type == (int) R_390_GNU_VTINHERIT
2363 || r_type == (int) R_390_GNU_VTENTRY)
2365 if (r_type >= (int) R_390_max)
2367 bfd_set_error (bfd_error_bad_value);
2371 howto = elf_howto_table + r_type;
2372 r_symndx = ELF32_R_SYM (rel->r_info);
2377 unresolved_reloc = FALSE;
2378 if (r_symndx < symtab_hdr->sh_info)
2380 sym = local_syms + r_symndx;
2381 sec = local_sections[r_symndx];
2382 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2384 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2385 if (local_plt == NULL)
2388 /* Address of the PLT slot. */
2389 relocation = (htab->elf.iplt->output_section->vma
2390 + htab->elf.iplt->output_offset
2391 + local_plt[r_symndx].plt.offset);
2395 case R_390_PLTOFF16:
2396 case R_390_PLTOFF32:
2397 relocation -= htab->elf.sgot->output_section->vma;
2399 case R_390_GOTPLT12:
2400 case R_390_GOTPLT16:
2401 case R_390_GOTPLT20:
2402 case R_390_GOTPLT32:
2403 case R_390_GOTPLTENT:
2410 /* Write the PLT slot address into the GOT slot. */
2411 bfd_put_32 (output_bfd, relocation,
2412 htab->elf.sgot->contents +
2413 local_got_offsets[r_symndx]);
2414 relocation = (local_got_offsets[r_symndx] +
2415 htab->elf.sgot->output_offset);
2417 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2418 relocation += htab->elf.sgot->output_section->vma;
2424 /* The output section is needed later in
2425 finish_dynamic_section when creating the dynamic
2427 local_plt[r_symndx].sec = sec;
2431 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2435 bfd_boolean warned ATTRIBUTE_UNUSED;
2436 bfd_boolean ignored ATTRIBUTE_UNUSED;
2438 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2439 r_symndx, symtab_hdr, sym_hashes,
2441 unresolved_reloc, warned, ignored);
2444 if (sec != NULL && discarded_section (sec))
2445 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2446 rel, 1, relend, howto, 0, contents);
2448 if (bfd_link_relocatable (info))
2453 case R_390_GOTPLT12:
2454 case R_390_GOTPLT16:
2455 case R_390_GOTPLT20:
2456 case R_390_GOTPLT32:
2457 case R_390_GOTPLTENT:
2458 /* There are three cases for a GOTPLT relocation. 1) The
2459 relocation is against the jump slot entry of a plt that
2460 will get emitted to the output file. 2) The relocation
2461 is against the jump slot of a plt entry that has been
2462 removed. elf_s390_adjust_gotplt has created a GOT entry
2463 as replacement. 3) The relocation is against a local symbol.
2464 Cases 2) and 3) are the same as the GOT relocation code
2465 so we just have to test for case 1 and fall through for
2467 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2471 if (s390_is_ifunc_symbol_p (h))
2473 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2474 relocation = (plt_index * GOT_ENTRY_SIZE +
2475 htab->elf.igotplt->output_offset);
2476 if (r_type == R_390_GOTPLTENT)
2477 relocation += htab->elf.igotplt->output_section->vma;
2482 Current offset - size first entry / entry size. */
2483 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2486 /* Offset in GOT is PLT index plus GOT headers(3)
2487 times 4, addr & GOT addr. */
2488 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2489 if (r_type == R_390_GOTPLTENT)
2490 relocation += htab->elf.sgot->output_section->vma;
2492 unresolved_reloc = FALSE;
2502 /* Relocation is to the entry for this symbol in the global
2504 if (base_got == NULL)
2511 off = h->got.offset;
2512 dyn = htab->elf.dynamic_sections_created;
2514 if (s390_is_ifunc_symbol_p (h))
2516 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2517 if (off == (bfd_vma)-1)
2519 /* No explicit GOT usage so redirect to the
2521 base_got = htab->elf.igotplt;
2522 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2526 /* Explicit GOT slots must contain the address
2527 of the PLT slot. This will be handled in
2528 finish_dynamic_symbol. */
2531 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2532 bfd_link_pic (info),
2534 || (bfd_link_pic (info)
2535 && SYMBOL_REFERENCES_LOCAL (info, h))
2536 || (ELF_ST_VISIBILITY (h->other)
2537 && h->root.type == bfd_link_hash_undefweak))
2540 /* This is actually a static link, or it is a
2541 -Bsymbolic link and the symbol is defined
2542 locally, or the symbol was forced to be local
2543 because of a version file. We must initialize
2544 this entry in the global offset table. Since the
2545 offset must always be a multiple of 2, we use the
2546 least significant bit to record whether we have
2547 initialized it already.
2549 When doing a dynamic link, we create a .rel.got
2550 relocation entry to initialize the value. This
2551 is done in the finish_dynamic_symbol routine. */
2556 bfd_put_32 (output_bfd, relocation,
2557 base_got->contents + off);
2562 && bfd_link_pic (info)
2563 && SYMBOL_REFERENCES_LOCAL (info, h))
2564 /* lrl rx,sym@GOTENT -> larl rx, sym */
2565 && ((r_type == R_390_GOTENT
2566 && (bfd_get_16 (input_bfd,
2567 contents + rel->r_offset - 2)
2568 & 0xff0f) == 0xc40d)
2569 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2570 || (r_type == R_390_GOT20
2571 && (bfd_get_32 (input_bfd,
2572 contents + rel->r_offset - 2)
2573 & 0xff00f000) == 0xe300c000
2574 && bfd_get_8 (input_bfd,
2575 contents + rel->r_offset + 3) == 0x58)))
2577 unsigned short new_insn =
2578 (0xc000 | (bfd_get_8 (input_bfd,
2579 contents + rel->r_offset - 1) & 0xf0));
2580 bfd_put_16 (output_bfd, new_insn,
2581 contents + rel->r_offset - 2);
2582 r_type = R_390_PC32DBL;
2584 howto = elf_howto_table + r_type;
2585 relocation = h->root.u.def.value
2586 + h->root.u.def.section->output_section->vma
2587 + h->root.u.def.section->output_offset;
2592 unresolved_reloc = FALSE;
2596 if (local_got_offsets == NULL)
2599 off = local_got_offsets[r_symndx];
2601 /* The offset must always be a multiple of 4. We use
2602 the least significant bit to record whether we have
2603 already generated the necessary reloc. */
2608 bfd_put_32 (output_bfd, relocation,
2609 htab->elf.sgot->contents + off);
2611 if (bfd_link_pic (info))
2614 Elf_Internal_Rela outrel;
2617 srelgot = htab->elf.srelgot;
2618 if (srelgot == NULL)
2621 outrel.r_offset = (htab->elf.sgot->output_section->vma
2622 + htab->elf.sgot->output_offset
2624 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2625 outrel.r_addend = relocation;
2626 loc = srelgot->contents;
2627 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2628 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2631 local_got_offsets[r_symndx] |= 1;
2635 if (off >= (bfd_vma) -2)
2638 relocation = base_got->output_offset + off;
2640 /* For @GOTENT the relocation is against the offset between
2641 the instruction and the symbols entry in the GOT and not
2642 between the start of the GOT and the symbols entry. We
2643 add the vma of the GOT to get the correct value. */
2644 if ( r_type == R_390_GOTENT
2645 || r_type == R_390_GOTPLTENT)
2646 relocation += base_got->output_section->vma;
2650 case R_390_GOTOFF16:
2651 case R_390_GOTOFF32:
2652 /* Relocation is relative to the start of the global offset
2656 && s390_is_ifunc_symbol_p (h)
2658 && !bfd_link_executable (info))
2660 relocation = (htab->elf.iplt->output_section->vma
2661 + htab->elf.iplt->output_offset
2663 - htab->elf.sgot->output_section->vma);
2667 /* Note that sgot->output_offset is not involved in this
2668 calculation. We always want the start of .got. If we
2669 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2670 permitted by the ABI, we might have to change this
2672 relocation -= htab->elf.sgot->output_section->vma;
2676 case R_390_GOTPCDBL:
2677 /* Use global offset table as symbol value. */
2678 relocation = htab->elf.sgot->output_section->vma;
2679 unresolved_reloc = FALSE;
2682 case R_390_PLT12DBL:
2683 case R_390_PLT16DBL:
2684 case R_390_PLT24DBL:
2685 case R_390_PLT32DBL:
2687 /* Relocation is to the entry for this symbol in the
2688 procedure linkage table. */
2690 /* Resolve a PLT32 reloc against a local symbol directly,
2691 without using the procedure linkage table. */
2695 if (h->plt.offset == (bfd_vma) -1
2696 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2698 /* We didn't make a PLT entry for this symbol. This
2699 happens when statically linking PIC code, or when
2700 using -Bsymbolic. */
2704 if (s390_is_ifunc_symbol_p (h))
2705 relocation = (htab->elf.iplt->output_section->vma
2706 + htab->elf.iplt->output_offset
2709 relocation = (htab->elf.splt->output_section->vma
2710 + htab->elf.splt->output_offset
2712 unresolved_reloc = FALSE;
2715 case R_390_PLTOFF16:
2716 case R_390_PLTOFF32:
2717 /* Relocation is to the entry for this symbol in the
2718 procedure linkage table relative to the start of the GOT. */
2720 /* For local symbols or if we didn't make a PLT entry for
2721 this symbol resolve the symbol directly. */
2723 || h->plt.offset == (bfd_vma) -1
2724 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2726 relocation -= htab->elf.sgot->output_section->vma;
2730 if (s390_is_ifunc_symbol_p (h))
2731 relocation = (htab->elf.iplt->output_section->vma
2732 + htab->elf.iplt->output_offset
2734 - htab->elf.sgot->output_section->vma);
2736 relocation = (htab->elf.splt->output_section->vma
2737 + htab->elf.splt->output_offset
2739 - htab->elf.sgot->output_section->vma);
2740 unresolved_reloc = FALSE;
2750 && s390_is_ifunc_symbol_p (h)
2752 && !bfd_link_executable (info))
2754 /* This will not work our if the function does not
2755 happen to set up the GOT pointer for some other
2756 reason. 31 bit PLT entries require r12 to hold the
2758 FIXME: Implement an errorcheck.
2759 NOTE: It will work when brasl is not available
2760 (e.g. with -m31 -march=g5) since a local function
2761 call then does use GOTOFF which implies r12 being set
2763 relocation = (htab->elf.iplt->output_section->vma
2764 + htab->elf.iplt->output_offset
2774 && s390_is_ifunc_symbol_p (h)
2777 if (!bfd_link_pic (info))
2779 /* For a non-shared object STT_GNU_IFUNC symbol must
2781 relocation = (htab->elf.iplt->output_section->vma
2782 + htab->elf.iplt->output_offset
2788 /* For shared objects a runtime relocation is needed. */
2790 Elf_Internal_Rela outrel;
2793 /* Need a dynamic relocation to get the real function
2795 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2799 if (outrel.r_offset == (bfd_vma) -1
2800 || outrel.r_offset == (bfd_vma) -2)
2803 outrel.r_offset += (input_section->output_section->vma
2804 + input_section->output_offset);
2806 if (h->dynindx == -1
2808 || bfd_link_executable (info))
2810 /* This symbol is resolved locally. */
2811 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2812 outrel.r_addend = (h->root.u.def.value
2813 + h->root.u.def.section->output_section->vma
2814 + h->root.u.def.section->output_offset);
2818 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2819 outrel.r_addend = 0;
2822 sreloc = htab->elf.irelifunc;
2823 elf_append_rela (output_bfd, sreloc, &outrel);
2825 /* If this reloc is against an external symbol, we
2826 do not want to fiddle with the addend. Otherwise,
2827 we need to include the symbol value so that it
2828 becomes an addend for the dynamic reloc. For an
2829 internal symbol, we have updated addend. */
2834 if ((input_section->flags & SEC_ALLOC) == 0)
2837 if ((bfd_link_pic (info)
2839 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2840 || h->root.type != bfd_link_hash_undefweak)
2841 && ((r_type != R_390_PC16
2842 && r_type != R_390_PC12DBL
2843 && r_type != R_390_PC16DBL
2844 && r_type != R_390_PC24DBL
2845 && r_type != R_390_PC32DBL
2846 && r_type != R_390_PC32)
2847 || !SYMBOL_CALLS_LOCAL (info, h)))
2848 || (ELIMINATE_COPY_RELOCS
2849 && !bfd_link_pic (info)
2855 || h->root.type == bfd_link_hash_undefweak
2856 || h->root.type == bfd_link_hash_undefined)))
2858 Elf_Internal_Rela outrel;
2859 bfd_boolean skip, relocate;
2863 /* When generating a shared object, these relocations
2864 are copied into the output file to be resolved at run
2871 _bfd_elf_section_offset (output_bfd, info, input_section,
2873 if (outrel.r_offset == (bfd_vma) -1)
2875 else if (outrel.r_offset == (bfd_vma) -2)
2876 skip = TRUE, relocate = TRUE;
2877 outrel.r_offset += (input_section->output_section->vma
2878 + input_section->output_offset);
2881 memset (&outrel, 0, sizeof outrel);
2884 && (r_type == R_390_PC16
2885 || r_type == R_390_PC12DBL
2886 || r_type == R_390_PC16DBL
2887 || r_type == R_390_PC24DBL
2888 || r_type == R_390_PC32DBL
2889 || r_type == R_390_PC32
2890 || !bfd_link_pic (info)
2891 || !SYMBOLIC_BIND (info, h)
2892 || !h->def_regular))
2894 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2895 outrel.r_addend = rel->r_addend;
2899 /* This symbol is local, or marked to become local. */
2900 outrel.r_addend = relocation + rel->r_addend;
2901 if (r_type == R_390_32)
2904 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2910 if (bfd_is_abs_section (sec))
2912 else if (sec == NULL || sec->owner == NULL)
2914 bfd_set_error(bfd_error_bad_value);
2921 osec = sec->output_section;
2922 sindx = elf_section_data (osec)->dynindx;
2925 osec = htab->elf.text_index_section;
2926 sindx = elf_section_data (osec)->dynindx;
2928 BFD_ASSERT (sindx != 0);
2930 /* We are turning this relocation into one
2931 against a section symbol, so subtract out
2932 the output section's address but not the
2933 offset of the input section in the output
2935 outrel.r_addend -= osec->vma;
2937 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2941 sreloc = elf_section_data (input_section)->sreloc;
2945 loc = sreloc->contents;
2946 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2947 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2949 /* If this reloc is against an external symbol, we do
2950 not want to fiddle with the addend. Otherwise, we
2951 need to include the symbol value so that it becomes
2952 an addend for the dynamic reloc. */
2958 /* Relocations for tls literal pool entries. */
2959 case R_390_TLS_IE32:
2960 if (bfd_link_pic (info))
2962 Elf_Internal_Rela outrel;
2966 outrel.r_offset = rel->r_offset
2967 + input_section->output_section->vma
2968 + input_section->output_offset;
2969 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2970 sreloc = elf_section_data (input_section)->sreloc;
2973 loc = sreloc->contents;
2974 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2975 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2979 case R_390_TLS_GD32:
2980 case R_390_TLS_GOTIE32:
2981 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2982 tls_type = GOT_UNKNOWN;
2983 if (h == NULL && local_got_offsets)
2984 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2987 tls_type = elf_s390_hash_entry(h)->tls_type;
2988 if (!bfd_link_pic (info)
2990 && tls_type >= GOT_TLS_IE)
2991 r_type = R_390_TLS_LE32;
2993 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2994 r_type = R_390_TLS_IE32;
2996 if (r_type == R_390_TLS_LE32)
2998 /* This relocation gets optimized away by the local exec
2999 access optimization. */
3000 BFD_ASSERT (! unresolved_reloc);
3001 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3002 contents + rel->r_offset);
3006 if (htab->elf.sgot == NULL)
3010 off = h->got.offset;
3013 if (local_got_offsets == NULL)
3016 off = local_got_offsets[r_symndx];
3025 Elf_Internal_Rela outrel;
3029 if (htab->elf.srelgot == NULL)
3032 outrel.r_offset = (htab->elf.sgot->output_section->vma
3033 + htab->elf.sgot->output_offset + off);
3035 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3036 if (r_type == R_390_TLS_GD32)
3037 dr_type = R_390_TLS_DTPMOD;
3039 dr_type = R_390_TLS_TPOFF;
3040 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3041 outrel.r_addend = relocation - dtpoff_base (info);
3043 outrel.r_addend = 0;
3044 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3045 loc = htab->elf.srelgot->contents;
3046 loc += htab->elf.srelgot->reloc_count++
3047 * sizeof (Elf32_External_Rela);
3048 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3050 if (r_type == R_390_TLS_GD32)
3054 BFD_ASSERT (! unresolved_reloc);
3055 bfd_put_32 (output_bfd,
3056 relocation - dtpoff_base (info),
3057 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3061 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3062 outrel.r_offset += GOT_ENTRY_SIZE;
3063 outrel.r_addend = 0;
3064 htab->elf.srelgot->reloc_count++;
3065 loc += sizeof (Elf32_External_Rela);
3066 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3073 local_got_offsets[r_symndx] |= 1;
3076 if (off >= (bfd_vma) -2)
3078 if (r_type == ELF32_R_TYPE (rel->r_info))
3080 relocation = htab->elf.sgot->output_offset + off;
3081 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3082 relocation += htab->elf.sgot->output_section->vma;
3083 unresolved_reloc = FALSE;
3087 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3088 contents + rel->r_offset);
3093 case R_390_TLS_GOTIE12:
3094 case R_390_TLS_GOTIE20:
3095 case R_390_TLS_IEENT:
3098 if (local_got_offsets == NULL)
3100 off = local_got_offsets[r_symndx];
3101 if (bfd_link_pic (info))
3102 goto emit_tls_relocs;
3106 off = h->got.offset;
3107 tls_type = elf_s390_hash_entry(h)->tls_type;
3108 if (bfd_link_pic (info)
3110 || tls_type < GOT_TLS_IE)
3111 goto emit_tls_relocs;
3114 if (htab->elf.sgot == NULL)
3117 BFD_ASSERT (! unresolved_reloc);
3118 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3119 htab->elf.sgot->contents + off);
3120 relocation = htab->elf.sgot->output_offset + off;
3121 if (r_type == R_390_TLS_IEENT)
3122 relocation += htab->elf.sgot->output_section->vma;
3123 unresolved_reloc = FALSE;
3126 case R_390_TLS_LDM32:
3127 if (! bfd_link_pic (info))
3128 /* The literal pool entry this relocation refers to gets ignored
3129 by the optimized code of the local exec model. Do nothing
3130 and the value will turn out zero. */
3133 if (htab->elf.sgot == NULL)
3136 off = htab->tls_ldm_got.offset;
3141 Elf_Internal_Rela outrel;
3144 if (htab->elf.srelgot == NULL)
3147 outrel.r_offset = (htab->elf.sgot->output_section->vma
3148 + htab->elf.sgot->output_offset + off);
3150 bfd_put_32 (output_bfd, 0,
3151 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3152 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3153 outrel.r_addend = 0;
3154 loc = htab->elf.srelgot->contents;
3155 loc += htab->elf.srelgot->reloc_count++
3156 * sizeof (Elf32_External_Rela);
3157 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3158 htab->tls_ldm_got.offset |= 1;
3160 relocation = htab->elf.sgot->output_offset + off;
3161 unresolved_reloc = FALSE;
3164 case R_390_TLS_LE32:
3165 if (bfd_link_dll (info))
3167 /* Linking a shared library with non-fpic code requires
3168 a R_390_TLS_TPOFF relocation. */
3169 Elf_Internal_Rela outrel;
3174 outrel.r_offset = rel->r_offset
3175 + input_section->output_section->vma
3176 + input_section->output_offset;
3177 if (h != NULL && h->dynindx != -1)
3181 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3183 outrel.r_addend = relocation - dtpoff_base (info);
3185 outrel.r_addend = 0;
3186 sreloc = elf_section_data (input_section)->sreloc;
3189 loc = sreloc->contents;
3190 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3191 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3195 BFD_ASSERT (! unresolved_reloc);
3196 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3197 contents + rel->r_offset);
3201 case R_390_TLS_LDO32:
3202 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3203 relocation -= dtpoff_base (info);
3205 /* When converting LDO to LE, we must negate. */
3206 relocation = -tpoff (info, relocation);
3209 /* Relocations for tls instructions. */
3210 case R_390_TLS_LOAD:
3211 case R_390_TLS_GDCALL:
3212 case R_390_TLS_LDCALL:
3213 tls_type = GOT_UNKNOWN;
3214 if (h == NULL && local_got_offsets)
3215 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3217 tls_type = elf_s390_hash_entry(h)->tls_type;
3219 if (tls_type == GOT_TLS_GD)
3222 if (r_type == R_390_TLS_LOAD)
3224 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3226 /* IE->LE transition. Four valid cases:
3227 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3228 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3229 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3230 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3231 unsigned int insn, ry;
3233 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3234 if ((insn & 0xff00f000) == 0x58000000)
3235 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3236 ry = (insn & 0x000f0000);
3237 else if ((insn & 0xff0f0000) == 0x58000000)
3238 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3239 ry = (insn & 0x0000f000) << 4;
3240 else if ((insn & 0xff00f000) == 0x5800c000)
3241 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3242 ry = (insn & 0x000f0000);
3243 else if ((insn & 0xff0f0000) == 0x580c0000)
3244 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3245 ry = (insn & 0x0000f000) << 4;
3248 invalid_tls_insn (input_bfd, input_section, rel);
3251 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3252 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3255 else if (r_type == R_390_TLS_GDCALL)
3259 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3260 if ((insn & 0xff000fff) != 0x4d000000 &&
3261 (insn & 0xffff0000) != 0xc0e50000 &&
3262 (insn & 0xff000000) != 0x0d000000)
3264 invalid_tls_insn (input_bfd, input_section, rel);
3267 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3269 if ((insn & 0xff000000) == 0x0d000000)
3271 /* GD->LE transition.
3272 basr rx, ry -> nopr r7 */
3273 insn = 0x07070000 | (insn & 0xffff);
3275 else if ((insn & 0xff000000) == 0x4d000000)
3277 /* GD->LE transition.
3278 bas %r14,0(%rx,%r13) -> bc 0,0 */
3283 /* GD->LE transition.
3284 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3286 bfd_put_16 (output_bfd, 0x0000,
3287 contents + rel->r_offset + 4);
3292 /* If basr is used in the pic case to invoke
3293 _tls_get_offset, something went wrong before. */
3294 if ((insn & 0xff000000) == 0x0d000000)
3296 invalid_tls_insn (input_bfd, input_section, rel);
3300 if ((insn & 0xff000000) == 0x4d000000)
3302 /* GD->IE transition.
3303 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3308 /* GD->IE transition.
3309 brasl %r14,__tls_get_addr@plt ->
3310 l %r2,0(%r2,%r12) ; bcr 0,0 */
3312 bfd_put_16 (output_bfd, 0x0700,
3313 contents + rel->r_offset + 4);
3316 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3318 else if (r_type == R_390_TLS_LDCALL)
3320 if (!bfd_link_pic (info))
3324 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3325 if ((insn & 0xff000fff) != 0x4d000000 &&
3326 (insn & 0xffff0000) != 0xc0e50000 &&
3327 (insn & 0xff000000) != 0x0d000000)
3329 invalid_tls_insn (input_bfd, input_section, rel);
3333 if ((insn & 0xff000000) == 0x0d000000)
3335 /* LD->LE transition.
3336 basr rx, ry -> nopr r7 */
3337 insn = 0x07070000 | (insn & 0xffff);
3339 else if ((insn & 0xff000000) == 0x4d000000)
3341 /* LD->LE transition.
3342 bas %r14,0(%rx,%r13) -> bc 0,0 */
3347 /* LD->LE transition.
3348 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3350 bfd_put_16 (output_bfd, 0x0000,
3351 contents + rel->r_offset + 4);
3353 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3362 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3363 because such sections are not SEC_ALLOC and thus ld.so will
3364 not process them. */
3365 if (unresolved_reloc
3366 && !((input_section->flags & SEC_DEBUGGING) != 0
3368 && _bfd_elf_section_offset (output_bfd, info, input_section,
3369 rel->r_offset) != (bfd_vma) -1)
3371 /* xgettext:c-format */
3372 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3375 (long) rel->r_offset,
3377 h->root.root.string);
3381 /* When applying a 24 bit reloc we need to start one byte
3382 earlier. Otherwise the 32 bit get/put bfd operations might
3383 access a byte after the actual section. */
3384 if (r_type == R_390_PC24DBL
3385 || r_type == R_390_PLT24DBL)
3388 if (r_type == R_390_20
3389 || r_type == R_390_GOT20
3390 || r_type == R_390_GOTPLT20
3391 || r_type == R_390_TLS_GOTIE20)
3393 relocation += rel->r_addend;
3394 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3395 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3396 contents, rel->r_offset,
3400 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3401 contents, rel->r_offset,
3402 relocation, rel->r_addend);
3404 if (r != bfd_reloc_ok)
3409 name = h->root.root.string;
3412 name = bfd_elf_string_from_elf_section (input_bfd,
3413 symtab_hdr->sh_link,
3418 name = bfd_section_name (input_bfd, sec);
3421 if (r == bfd_reloc_overflow)
3422 (*info->callbacks->reloc_overflow)
3423 (info, (h ? &h->root : NULL), name, howto->name,
3424 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3428 /* xgettext:c-format */
3429 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3430 input_bfd, input_section,
3431 (long) rel->r_offset, name, (int) r);
3440 /* Generate the PLT slots together with the dynamic relocations needed
3441 for IFUNC symbols. */
3444 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3445 struct bfd_link_info *info,
3446 struct elf_link_hash_entry *h,
3447 struct elf_s390_link_hash_table *htab,
3448 bfd_vma iplt_offset,
3449 bfd_vma resolver_address)
3453 bfd_vma igotiplt_offset;
3454 Elf_Internal_Rela rela;
3456 asection *plt, *gotplt, *relplt;
3457 bfd_vma relative_offset;
3459 if (htab->elf.iplt == NULL
3460 || htab->elf.igotplt == NULL
3461 || htab->elf.irelplt == NULL)
3464 gotplt = htab->elf.igotplt;
3465 relplt = htab->elf.irelplt;
3467 /* Index of the PLT slot within iplt section. */
3468 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3469 plt = htab->elf.iplt;
3470 /* Offset into the igot.plt section. */
3471 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3472 /* Offset into the got section. */
3473 got_offset = igotiplt_offset + gotplt->output_offset;
3475 /* S390 uses halfwords for relative branch calc! */
3476 relative_offset = - (plt->output_offset +
3477 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3478 /* If offset is > 32768, branch to a previous branch
3479 390 can only handle +-64 K jumps. */
3480 if ( -32768 > (int) relative_offset )
3482 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3484 /* Fill in the entry in the procedure linkage table. */
3485 if (!bfd_link_pic (info))
3487 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3490 /* Adjust jump to the first plt entry. */
3491 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3492 plt->contents + iplt_offset + 20);
3494 /* Push the GOT offset field. */
3495 bfd_put_32 (output_bfd,
3496 (gotplt->output_section->vma
3498 plt->contents + iplt_offset + 24);
3500 else if (got_offset < 4096)
3502 /* The GOT offset is small enough to be used directly as
3504 memcpy (plt->contents + iplt_offset,
3505 elf_s390_plt_pic12_entry,
3508 /* Put in the GOT offset as displacement value. The 0xc000
3509 value comes from the first word of the plt entry. Look
3510 at the elf_s390_plt_pic16_entry content. */
3511 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3512 plt->contents + iplt_offset + 2);
3514 /* Adjust the jump to the first plt entry. */
3515 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3516 plt->contents + iplt_offset + 20);
3518 else if (got_offset < 32768)
3520 /* The GOT offset is too big for a displacement but small
3521 enough to be a signed 16 bit immediate value as it can be
3522 used in an lhi instruction. */
3523 memcpy (plt->contents + iplt_offset,
3524 elf_s390_plt_pic16_entry,
3527 /* Put in the GOT offset for the lhi instruction. */
3528 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3529 plt->contents + iplt_offset + 2);
3531 /* Adjust the jump to the first plt entry. */
3532 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3533 plt->contents + iplt_offset + 20);
3537 memcpy (plt->contents + iplt_offset,
3538 elf_s390_plt_pic_entry,
3541 /* Adjust the jump to the first plt entry. */
3542 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3543 plt->contents + iplt_offset + 20);
3545 /* Push the GOT offset field. */
3546 bfd_put_32 (output_bfd, got_offset,
3547 plt->contents + iplt_offset + 24);
3549 /* Insert offset into reloc. table here. */
3550 bfd_put_32 (output_bfd, relplt->output_offset +
3551 iplt_index * RELA_ENTRY_SIZE,
3552 plt->contents + iplt_offset + 28);
3554 /* Fill in the entry in the global offset table.
3555 Points to instruction after GOT offset. */
3556 bfd_put_32 (output_bfd,
3557 (plt->output_section->vma
3558 + plt->output_offset
3561 gotplt->contents + igotiplt_offset);
3563 /* Fill in the entry in the .rela.plt section. */
3564 rela.r_offset = gotplt->output_section->vma + got_offset;
3568 || ((bfd_link_executable (info)
3569 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3572 /* The symbol can be locally resolved. */
3573 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3574 rela.r_addend = resolver_address;
3578 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3582 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3583 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3586 /* Finish up dynamic symbol handling. We set the contents of various
3587 dynamic sections here. */
3590 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3591 struct bfd_link_info *info,
3592 struct elf_link_hash_entry *h,
3593 Elf_Internal_Sym *sym)
3595 struct elf_s390_link_hash_table *htab;
3596 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3598 htab = elf_s390_hash_table (info);
3600 if (h->plt.offset != (bfd_vma) -1)
3604 Elf_Internal_Rela rela;
3606 bfd_vma relative_offset;
3608 /* This symbol has an entry in the procedure linkage table. Set
3610 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3612 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3613 htab, h->plt.offset,
3614 eh->ifunc_resolver_address +
3615 eh->ifunc_resolver_section->output_offset +
3616 eh->ifunc_resolver_section->output_section->vma);
3617 /* Do not return yet. Handling of explicit GOT slots of
3618 IFUNC symbols is below. */
3622 if (h->dynindx == -1
3623 || htab->elf.splt == NULL
3624 || htab->elf.sgotplt == NULL
3625 || htab->elf.srelplt == NULL)
3629 Current offset - size first entry / entry size. */
3630 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3632 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3634 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3636 /* S390 uses halfwords for relative branch calc! */
3637 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3638 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3639 /* If offset is > 32768, branch to a previous branch
3640 390 can only handle +-64 K jumps. */
3641 if ( -32768 > (int) relative_offset )
3643 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3645 /* Fill in the entry in the procedure linkage table. */
3646 if (!bfd_link_pic (info))
3648 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3651 /* Adjust jump to the first plt entry. */
3652 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3653 htab->elf.splt->contents + h->plt.offset + 20);
3655 /* Push the GOT offset field. */
3656 bfd_put_32 (output_bfd,
3657 (htab->elf.sgotplt->output_section->vma
3658 + htab->elf.sgotplt->output_offset
3660 htab->elf.splt->contents + h->plt.offset + 24);
3662 else if (got_offset < 4096)
3664 /* The GOT offset is small enough to be used directly as
3666 memcpy (htab->elf.splt->contents + h->plt.offset,
3667 elf_s390_plt_pic12_entry,
3670 /* Put in the GOT offset as displacement value. The 0xc000
3671 value comes from the first word of the plt entry. Look
3672 at the elf_s390_plt_pic12_entry content. */
3673 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3674 htab->elf.splt->contents + h->plt.offset + 2);
3676 /* Adjust the jump to the first plt entry. */
3677 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3678 htab->elf.splt->contents + h->plt.offset + 20);
3680 else if (got_offset < 32768)
3682 /* The GOT offset is too big for a displacement but small
3683 enough to be a signed 16 bit immediate value as it can be
3684 used in an lhi instruction. */
3685 memcpy (htab->elf.splt->contents + h->plt.offset,
3686 elf_s390_plt_pic16_entry,
3689 /* Put in the GOT offset for the lhi instruction. */
3690 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3691 htab->elf.splt->contents + h->plt.offset + 2);
3693 /* Adjust the jump to the first plt entry. */
3694 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3695 htab->elf.splt->contents + h->plt.offset + 20);
3699 memcpy (htab->elf.splt->contents + h->plt.offset,
3700 elf_s390_plt_pic_entry,
3703 /* Adjust the jump to the first plt entry. */
3704 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3705 htab->elf.splt->contents + h->plt.offset + 20);
3707 /* Push the GOT offset field. */
3708 bfd_put_32 (output_bfd, got_offset,
3709 htab->elf.splt->contents + h->plt.offset + 24);
3711 /* Insert offset into reloc. table here. */
3712 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3713 htab->elf.splt->contents + h->plt.offset + 28);
3715 /* Fill in the entry in the global offset table.
3716 Points to instruction after GOT offset. */
3717 bfd_put_32 (output_bfd,
3718 (htab->elf.splt->output_section->vma
3719 + htab->elf.splt->output_offset
3722 htab->elf.sgotplt->contents + got_offset);
3724 /* Fill in the entry in the .rela.plt section. */
3725 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3726 + htab->elf.sgotplt->output_offset
3728 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3730 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3731 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3733 if (!h->def_regular)
3735 /* Mark the symbol as undefined, rather than as defined in
3736 the .plt section. Leave the value alone. This is a clue
3737 for the dynamic linker, to make function pointer
3738 comparisons work between an application and shared
3740 sym->st_shndx = SHN_UNDEF;
3745 if (h->got.offset != (bfd_vma) -1
3746 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3747 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3748 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3750 Elf_Internal_Rela rela;
3753 /* This symbol has an entry in the global offset table. Set it
3756 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3759 rela.r_offset = (htab->elf.sgot->output_section->vma
3760 + htab->elf.sgot->output_offset
3761 + (h->got.offset &~ (bfd_vma) 1));
3763 /* If this is a static link, or it is a -Bsymbolic link and the
3764 symbol is defined locally or was forced to be local because
3765 of a version file, we just want to emit a RELATIVE reloc.
3766 The entry in the global offset table will already have been
3767 initialized in the relocate_section function. */
3768 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3770 if (bfd_link_pic (info))
3772 /* An explicit GOT slot usage needs GLOB_DAT. If the
3773 symbol references local the implicit got.iplt slot
3774 will be used and the IRELATIVE reloc has been created
3780 /* For non-shared objects explicit GOT slots must be
3781 filled with the PLT slot address for pointer
3782 equality reasons. */
3783 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3784 + htab->elf.iplt->output_offset
3786 htab->elf.sgot->contents + h->got.offset);
3790 else if (bfd_link_pic (info)
3791 && SYMBOL_REFERENCES_LOCAL (info, h))
3793 /* If this is a static link, or it is a -Bsymbolic link and
3794 the symbol is defined locally or was forced to be local
3795 because of a version file, we just want to emit a
3796 RELATIVE reloc. The entry in the global offset table
3797 will already have been initialized in the
3798 relocate_section function. */
3799 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3801 BFD_ASSERT((h->got.offset & 1) != 0);
3802 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3803 rela.r_addend = (h->root.u.def.value
3804 + h->root.u.def.section->output_section->vma
3805 + h->root.u.def.section->output_offset);
3809 BFD_ASSERT((h->got.offset & 1) == 0);
3811 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3812 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3816 loc = htab->elf.srelgot->contents;
3817 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3818 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3823 Elf_Internal_Rela rela;
3827 /* This symbols needs a copy reloc. Set it up. */
3829 if (h->dynindx == -1
3830 || (h->root.type != bfd_link_hash_defined
3831 && h->root.type != bfd_link_hash_defweak)
3832 || htab->elf.srelbss == NULL
3833 || htab->elf.sreldynrelro == NULL)
3836 rela.r_offset = (h->root.u.def.value
3837 + h->root.u.def.section->output_section->vma
3838 + h->root.u.def.section->output_offset);
3839 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3841 if (h->root.u.def.section == htab->elf.sdynrelro)
3842 s = htab->elf.sreldynrelro;
3844 s = htab->elf.srelbss;
3845 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3846 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3849 /* Mark some specially defined symbols as absolute. */
3850 if (h == htab->elf.hdynamic
3851 || h == htab->elf.hgot
3852 || h == htab->elf.hplt)
3853 sym->st_shndx = SHN_ABS;
3858 /* Used to decide how to sort relocs in an optimal manner for the
3859 dynamic linker, before writing them out. */
3861 static enum elf_reloc_type_class
3862 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3863 const asection *rel_sec ATTRIBUTE_UNUSED,
3864 const Elf_Internal_Rela *rela)
3866 bfd *abfd = info->output_bfd;
3867 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3868 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3869 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3870 Elf_Internal_Sym sym;
3872 if (htab->elf.dynsym == NULL
3873 || !bed->s->swap_symbol_in (abfd,
3874 (htab->elf.dynsym->contents
3875 + r_symndx * bed->s->sizeof_sym),
3879 /* Check relocation against STT_GNU_IFUNC symbol. */
3880 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3881 return reloc_class_ifunc;
3883 switch ((int) ELF32_R_TYPE (rela->r_info))
3885 case R_390_RELATIVE:
3886 return reloc_class_relative;
3887 case R_390_JMP_SLOT:
3888 return reloc_class_plt;
3890 return reloc_class_copy;
3892 return reloc_class_normal;
3896 /* Finish up the dynamic sections. */
3899 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3900 struct bfd_link_info *info)
3902 struct elf_s390_link_hash_table *htab;
3908 htab = elf_s390_hash_table (info);
3909 dynobj = htab->elf.dynobj;
3910 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3912 if (htab->elf.dynamic_sections_created)
3914 Elf32_External_Dyn *dyncon, *dynconend;
3916 if (sdyn == NULL || htab->elf.sgot == NULL)
3919 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3920 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3921 for (; dyncon < dynconend; dyncon++)
3923 Elf_Internal_Dyn dyn;
3926 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3934 s = htab->elf.sgotplt;
3935 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3939 s = htab->elf.srelplt;
3940 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3944 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3948 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3951 /* Fill in the special first entry in the procedure linkage table. */
3952 if (htab->elf.splt && htab->elf.splt->size > 0)
3954 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3955 if (bfd_link_pic (info))
3957 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3958 PLT_FIRST_ENTRY_SIZE);
3962 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3963 PLT_FIRST_ENTRY_SIZE);
3964 bfd_put_32 (output_bfd,
3965 htab->elf.sgotplt->output_section->vma
3966 + htab->elf.sgotplt->output_offset,
3967 htab->elf.splt->contents + 24);
3969 elf_section_data (htab->elf.splt->output_section)
3970 ->this_hdr.sh_entsize = 4;
3975 if (htab->elf.sgotplt)
3977 /* Fill in the first three entries in the global offset table. */
3978 if (htab->elf.sgotplt->size > 0)
3980 bfd_put_32 (output_bfd,
3981 (sdyn == NULL ? (bfd_vma) 0
3982 : sdyn->output_section->vma + sdyn->output_offset),
3983 htab->elf.sgotplt->contents);
3984 /* One entry for shared object struct ptr. */
3985 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3986 /* One entry for _dl_runtime_resolve. */
3987 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3990 elf_section_data (htab->elf.sgotplt->output_section)
3991 ->this_hdr.sh_entsize = 4;
3993 /* Finish dynamic symbol for local IFUNC symbols. */
3994 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3996 struct plt_entry *local_plt;
3997 Elf_Internal_Sym *isym;
3998 Elf_Internal_Shdr *symtab_hdr;
4000 symtab_hdr = &elf_symtab_hdr (ibfd);
4002 local_plt = elf_s390_local_plt (ibfd);
4003 if (local_plt != NULL)
4004 for (i = 0; i < symtab_hdr->sh_info; i++)
4006 if (local_plt[i].plt.offset != (bfd_vma) -1)
4008 asection *sec = local_plt[i].sec;
4009 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
4013 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4014 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
4015 local_plt[i].plt.offset,
4017 + sec->output_section->vma
4018 + sec->output_offset);
4026 /* Support for core dump NOTE sections. */
4029 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
4034 switch (note->descsz)
4039 case 224: /* S/390 Linux. */
4041 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4044 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
4052 /* Make a ".reg/999" section. */
4053 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4054 size, note->descpos + offset);
4058 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
4060 switch (note->descsz)
4065 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
4066 elf_tdata (abfd)->core->pid
4067 = bfd_get_32 (abfd, note->descdata + 12);
4068 elf_tdata (abfd)->core->program
4069 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
4070 elf_tdata (abfd)->core->command
4071 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
4075 /* Note that for some reason, a spurious space is tacked
4076 onto the end of the args in some (at least one anyway)
4077 implementations, so strip it off if it exists. */
4080 char *command = elf_tdata (abfd)->core->command;
4081 int n = strlen (command);
4083 if (0 < n && command[n - 1] == ' ')
4084 command[n - 1] = '\0';
4091 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
4103 char data[124] = { 0 };
4104 const char *fname, *psargs;
4106 va_start (ap, note_type);
4107 fname = va_arg (ap, const char *);
4108 psargs = va_arg (ap, const char *);
4111 strncpy (data + 28, fname, 16);
4112 strncpy (data + 44, psargs, 80);
4113 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4114 &data, sizeof (data));
4119 char data[224] = { 0 };
4124 va_start (ap, note_type);
4125 pid = va_arg (ap, long);
4126 cursig = va_arg (ap, int);
4127 gregs = va_arg (ap, const void *);
4130 bfd_put_16 (abfd, cursig, data + 12);
4131 bfd_put_32 (abfd, pid, data + 24);
4132 memcpy (data + 72, gregs, 144);
4133 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4134 &data, sizeof (data));
4140 /* Return address for Ith PLT stub in section PLT, for relocation REL
4141 or (bfd_vma) -1 if it should not be included. */
4144 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4145 const arelent *rel ATTRIBUTE_UNUSED)
4147 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4150 /* Merge backend specific data from an object file to the output
4151 object file when linking. */
4154 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4156 bfd *obfd = info->output_bfd;
4158 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4161 if (!elf_s390_merge_obj_attributes (ibfd, info))
4164 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4169 #define TARGET_BIG_SYM s390_elf32_vec
4170 #define TARGET_BIG_NAME "elf32-s390"
4171 #define ELF_ARCH bfd_arch_s390
4172 #define ELF_TARGET_ID S390_ELF_DATA
4173 #define ELF_MACHINE_CODE EM_S390
4174 #define ELF_MACHINE_ALT1 EM_S390_OLD
4175 #define ELF_MAXPAGESIZE 0x1000
4177 #define elf_backend_can_gc_sections 1
4178 #define elf_backend_can_refcount 1
4179 #define elf_backend_want_got_plt 1
4180 #define elf_backend_plt_readonly 1
4181 #define elf_backend_want_plt_sym 0
4182 #define elf_backend_got_header_size 12
4183 #define elf_backend_want_dynrelro 1
4184 #define elf_backend_rela_normal 1
4186 #define elf_info_to_howto elf_s390_info_to_howto
4188 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4189 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4190 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4191 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4193 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4195 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4196 #define elf_backend_check_relocs elf_s390_check_relocs
4197 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4198 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4199 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4200 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4201 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4202 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4203 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4204 #define elf_backend_relocate_section elf_s390_relocate_section
4205 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4206 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4207 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4208 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4209 #define elf_backend_write_core_note elf_s390_write_core_note
4210 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4211 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4212 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4214 #define bfd_elf32_mkobject elf_s390_mkobject
4215 #define elf_backend_object_p elf_s390_object_p
4217 #include "elf32-target.h"