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 int 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;
998 /* Create got section and local_got_refcounts array if they
1000 r_type = elf_s390_tls_transition (info,
1001 ELF32_R_TYPE (rel->r_info),
1010 case R_390_GOTPLT12:
1011 case R_390_GOTPLT16:
1012 case R_390_GOTPLT20:
1013 case R_390_GOTPLT32:
1014 case R_390_GOTPLTENT:
1015 case R_390_TLS_GD32:
1016 case R_390_TLS_GOTIE12:
1017 case R_390_TLS_GOTIE20:
1018 case R_390_TLS_GOTIE32:
1019 case R_390_TLS_IEENT:
1020 case R_390_TLS_IE32:
1021 case R_390_TLS_LDM32:
1023 && local_got_refcounts == NULL)
1025 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1027 local_got_refcounts = elf_local_got_refcounts (abfd);
1030 case R_390_GOTOFF16:
1031 case R_390_GOTOFF32:
1033 case R_390_GOTPCDBL:
1034 if (htab->elf.sgot == NULL)
1036 if (htab->elf.dynobj == NULL)
1037 htab->elf.dynobj = abfd;
1038 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1045 if (htab->elf.dynobj == NULL)
1046 htab->elf.dynobj = abfd;
1047 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1050 /* Make sure an IFUNC symbol defined in a non-shared object
1051 always gets a PLT slot. */
1052 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1054 /* The symbol is called by the dynamic loader in order
1055 to resolve the relocation. So it is in fact also
1064 case R_390_GOTPCDBL:
1065 /* These relocs do not need a GOT slot. They just load the
1066 GOT pointer itself or address something else relative to
1067 the GOT. Since the GOT pointer has been set up above we
1070 case R_390_GOTOFF16:
1071 case R_390_GOTOFF32:
1072 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1076 case R_390_PLT12DBL:
1077 case R_390_PLT16DBL:
1078 case R_390_PLT24DBL:
1079 case R_390_PLT32DBL:
1081 case R_390_PLTOFF16:
1082 case R_390_PLTOFF32:
1083 /* This symbol requires a procedure linkage table entry. We
1084 actually build the entry in adjust_dynamic_symbol,
1085 because this might be a case of linking PIC code which is
1086 never referenced by a dynamic object, in which case we
1087 don't need to generate a procedure linkage table entry
1090 /* If this is a local symbol, we resolve it directly without
1091 creating a procedure linkage table entry. */
1095 h->plt.refcount += 1;
1099 case R_390_GOTPLT12:
1100 case R_390_GOTPLT16:
1101 case R_390_GOTPLT20:
1102 case R_390_GOTPLT32:
1103 case R_390_GOTPLTENT:
1104 /* This symbol requires either a procedure linkage table entry
1105 or an entry in the local got. We actually build the entry
1106 in adjust_dynamic_symbol because whether this is really a
1107 global reference can change and with it the fact if we have
1108 to create a plt entry or a local got entry. To be able to
1109 make a once global symbol a local one we have to keep track
1110 of the number of gotplt references that exist for this
1114 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1116 h->plt.refcount += 1;
1119 local_got_refcounts[r_symndx] += 1;
1122 case R_390_TLS_LDM32:
1123 htab->tls_ldm_got.refcount += 1;
1126 case R_390_TLS_IE32:
1127 case R_390_TLS_GOTIE12:
1128 case R_390_TLS_GOTIE20:
1129 case R_390_TLS_GOTIE32:
1130 case R_390_TLS_IEENT:
1131 if (bfd_link_pic (info))
1132 info->flags |= DF_STATIC_TLS;
1140 case R_390_TLS_GD32:
1141 /* This symbol requires a global offset table entry. */
1150 tls_type = GOT_NORMAL;
1152 case R_390_TLS_GD32:
1153 tls_type = GOT_TLS_GD;
1155 case R_390_TLS_IE32:
1156 case R_390_TLS_GOTIE32:
1157 tls_type = GOT_TLS_IE;
1159 case R_390_TLS_GOTIE12:
1160 case R_390_TLS_GOTIE20:
1161 case R_390_TLS_IEENT:
1162 tls_type = GOT_TLS_IE_NLT;
1168 h->got.refcount += 1;
1169 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1173 local_got_refcounts[r_symndx] += 1;
1174 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1176 /* If a TLS symbol is accessed using IE at least once,
1177 there is no point to use dynamic model for it. */
1178 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1180 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1183 /* xgettext:c-format */
1184 (_("%B: `%s' accessed both as normal and thread local symbol"),
1185 abfd, h->root.root.string);
1188 if (old_tls_type > tls_type)
1189 tls_type = old_tls_type;
1192 if (old_tls_type != tls_type)
1195 elf_s390_hash_entry (h)->tls_type = tls_type;
1197 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1200 if (r_type != R_390_TLS_IE32)
1204 case R_390_TLS_LE32:
1205 /* For static linking and executables this reloc will be
1206 calculated at linktime otherwise a TLS_TPOFF runtime
1207 reloc will be generated. */
1208 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1211 if (!bfd_link_pic (info))
1213 info->flags |= DF_STATIC_TLS;
1225 if (h != NULL && bfd_link_executable (info))
1227 /* If this reloc is in a read-only section, we might
1228 need a copy reloc. We can't check reliably at this
1229 stage whether the section is read-only, as input
1230 sections have not yet been mapped to output sections.
1231 Tentatively set the flag for now, and correct in
1232 adjust_dynamic_symbol. */
1235 if (!bfd_link_pic (info))
1237 /* We may need a .plt entry if the function this reloc
1238 refers to is in a shared lib. */
1239 h->plt.refcount += 1;
1243 /* If we are creating a shared library, and this is a reloc
1244 against a global symbol, or a non PC relative reloc
1245 against a local symbol, then we need to copy the reloc
1246 into the shared library. However, if we are linking with
1247 -Bsymbolic, we do not need to copy a reloc against a
1248 global symbol which is defined in an object we are
1249 including in the link (i.e., DEF_REGULAR is set). At
1250 this point we have not seen all the input files, so it is
1251 possible that DEF_REGULAR is not set now but will be set
1252 later (it is never cleared). In case of a weak definition,
1253 DEF_REGULAR may be cleared later by a strong definition in
1254 a shared library. We account for that possibility below by
1255 storing information in the relocs_copied field of the hash
1256 table entry. A similar situation occurs when creating
1257 shared libraries and symbol visibility changes render the
1260 If on the other hand, we are creating an executable, we
1261 may need to keep relocations for symbols satisfied by a
1262 dynamic library if we manage to avoid copy relocs for the
1264 if ((bfd_link_pic (info)
1265 && (sec->flags & SEC_ALLOC) != 0
1266 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1267 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1268 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1269 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1270 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1271 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1273 && (! SYMBOLIC_BIND (info, h)
1274 || h->root.type == bfd_link_hash_defweak
1275 || !h->def_regular))))
1276 || (ELIMINATE_COPY_RELOCS
1277 && !bfd_link_pic (info)
1278 && (sec->flags & SEC_ALLOC) != 0
1280 && (h->root.type == bfd_link_hash_defweak
1281 || !h->def_regular)))
1283 struct elf_dyn_relocs *p;
1284 struct elf_dyn_relocs **head;
1286 /* We must copy these reloc types into the output file.
1287 Create a reloc section in dynobj and make room for
1291 if (htab->elf.dynobj == NULL)
1292 htab->elf.dynobj = abfd;
1294 sreloc = _bfd_elf_make_dynamic_reloc_section
1295 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1301 /* If this is a global symbol, we count the number of
1302 relocations we need for this symbol. */
1305 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1309 /* Track dynamic relocs needed for local syms too.
1310 We really need local syms available to do this
1315 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1320 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1324 vpp = &elf_section_data (s)->local_dynrel;
1325 head = (struct elf_dyn_relocs **) vpp;
1329 if (p == NULL || p->sec != sec)
1331 bfd_size_type amt = sizeof *p;
1333 p = ((struct elf_dyn_relocs *)
1334 bfd_alloc (htab->elf.dynobj, amt));
1345 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1346 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1347 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1348 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1349 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1355 /* This relocation describes the C++ object vtable hierarchy.
1356 Reconstruct it for later use during GC. */
1357 case R_390_GNU_VTINHERIT:
1358 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1362 /* This relocation describes which C++ vtable entries are actually
1363 used. Record for later use during GC. */
1364 case R_390_GNU_VTENTRY:
1365 BFD_ASSERT (h != NULL);
1367 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1379 /* Return the section that should be marked against GC for a given
1383 elf_s390_gc_mark_hook (asection *sec,
1384 struct bfd_link_info *info,
1385 Elf_Internal_Rela *rel,
1386 struct elf_link_hash_entry *h,
1387 Elf_Internal_Sym *sym)
1390 switch (ELF32_R_TYPE (rel->r_info))
1392 case R_390_GNU_VTINHERIT:
1393 case R_390_GNU_VTENTRY:
1396 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1400 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1401 entry but we found we will not create any. Called when we find we will
1402 not have any PLT for this symbol, by for example
1403 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1404 or elf_s390_size_dynamic_sections if no dynamic sections will be
1405 created (we're only linking static objects). */
1408 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1410 if (h->elf.root.type == bfd_link_hash_warning)
1411 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1413 if (h->gotplt_refcount <= 0)
1416 /* We simply add the number of gotplt references to the number
1417 * of got references for this symbol. */
1418 h->elf.got.refcount += h->gotplt_refcount;
1419 h->gotplt_refcount = -1;
1422 /* Find dynamic relocs for H that apply to read-only sections. */
1425 readonly_dynrelocs (struct elf_link_hash_entry *h)
1427 struct elf_dyn_relocs *p;
1429 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1431 asection *s = p->sec->output_section;
1433 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1439 /* Adjust a symbol defined by a dynamic object and referenced by a
1440 regular object. The current definition is in some section of the
1441 dynamic object, but we're not including those sections. We have to
1442 change the definition to something the rest of the link can
1446 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1447 struct elf_link_hash_entry *h)
1449 struct elf_s390_link_hash_table *htab;
1452 /* STT_GNU_IFUNC symbol must go through PLT. */
1453 if (s390_is_ifunc_symbol_p (h))
1455 /* All local STT_GNU_IFUNC references must be treated as local
1456 calls via local PLT. */
1457 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1459 bfd_size_type pc_count = 0, count = 0;
1460 struct elf_dyn_relocs **pp;
1461 struct elf_s390_link_hash_entry *eh;
1462 struct elf_dyn_relocs *p;
1464 eh = (struct elf_s390_link_hash_entry *) h;
1465 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1467 pc_count += p->pc_count;
1468 p->count -= p->pc_count;
1477 if (pc_count || count)
1481 if (h->plt.refcount <= 0)
1482 h->plt.refcount = 1;
1484 h->plt.refcount += 1;
1488 if (h->plt.refcount <= 0)
1490 h->plt.offset = (bfd_vma) -1;
1496 /* If this is a function, put it in the procedure linkage table. We
1497 will fill in the contents of the procedure linkage table later
1498 (although we could actually do it here). */
1499 if (h->type == STT_FUNC
1502 if (h->plt.refcount <= 0
1503 || SYMBOL_CALLS_LOCAL (info, h)
1504 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1505 && h->root.type != bfd_link_hash_undefweak))
1507 /* This case can occur if we saw a PLT32 reloc in an input
1508 file, but the symbol was never referred to by a dynamic
1509 object, or if all references were garbage collected. In
1510 such a case, we don't actually need to build a procedure
1511 linkage table, and we can just do a PC32 reloc instead. */
1512 h->plt.offset = (bfd_vma) -1;
1514 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1520 /* It's possible that we incorrectly decided a .plt reloc was
1521 needed for an R_390_PC32 reloc to a non-function sym in
1522 check_relocs. We can't decide accurately between function and
1523 non-function syms in check-relocs; Objects loaded later in
1524 the link may change h->type. So fix it now. */
1525 h->plt.offset = (bfd_vma) -1;
1527 /* If this is a weak symbol, and there is a real definition, the
1528 processor independent code will have arranged for us to see the
1529 real definition first, and we can just use the same value. */
1530 if (h->is_weakalias)
1532 struct elf_link_hash_entry *def = weakdef (h);
1533 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1534 h->root.u.def.section = def->root.u.def.section;
1535 h->root.u.def.value = def->root.u.def.value;
1536 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1537 h->non_got_ref = def->non_got_ref;
1541 /* This is a reference to a symbol defined by a dynamic object which
1542 is not a function. */
1544 /* If we are creating a shared library, we must presume that the
1545 only references to the symbol are via the global offset table.
1546 For such cases we need not do anything here; the relocations will
1547 be handled correctly by relocate_section. */
1548 if (bfd_link_pic (info))
1551 /* If there are no references to this symbol that do not use the
1552 GOT, we don't need to generate a copy reloc. */
1553 if (!h->non_got_ref)
1556 /* If -z nocopyreloc was given, we won't generate them either. */
1557 if (info->nocopyreloc)
1563 if (ELIMINATE_COPY_RELOCS)
1565 struct elf_s390_link_hash_entry * eh;
1566 struct elf_dyn_relocs *p;
1568 eh = (struct elf_s390_link_hash_entry *) h;
1569 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1571 s = p->sec->output_section;
1572 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1576 /* If we didn't find any dynamic relocs in read-only sections, then
1577 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1585 /* We must allocate the symbol in our .dynbss section, which will
1586 become part of the .bss section of the executable. There will be
1587 an entry for this symbol in the .dynsym section. The dynamic
1588 object will contain position independent code, so all references
1589 from the dynamic object to this symbol will go through the global
1590 offset table. The dynamic linker will use the .dynsym entry to
1591 determine the address it must put in the global offset table, so
1592 both the dynamic object and the regular object will refer to the
1593 same memory location for the variable. */
1595 htab = elf_s390_hash_table (info);
1597 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1598 copy the initial value out of the dynamic object and into the
1599 runtime process image. */
1600 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1602 s = htab->elf.sdynrelro;
1603 srel = htab->elf.sreldynrelro;
1607 s = htab->elf.sdynbss;
1608 srel = htab->elf.srelbss;
1610 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1612 srel->size += sizeof (Elf32_External_Rela);
1616 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1619 /* Allocate space in .plt, .got and associated reloc sections for
1623 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1625 struct bfd_link_info *info;
1626 struct elf_s390_link_hash_table *htab;
1627 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1628 struct elf_dyn_relocs *p;
1630 if (h->root.type == bfd_link_hash_indirect)
1633 info = (struct bfd_link_info *) inf;
1634 htab = elf_s390_hash_table (info);
1636 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1637 here if it is defined and referenced in a non-shared object. */
1638 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1639 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1640 else if (htab->elf.dynamic_sections_created
1641 && h->plt.refcount > 0)
1643 /* Make sure this symbol is output as a dynamic symbol.
1644 Undefined weak syms won't yet be marked as dynamic. */
1645 if (h->dynindx == -1
1646 && !h->forced_local)
1648 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1652 if (bfd_link_pic (info)
1653 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1655 asection *s = htab->elf.splt;
1657 /* If this is the first .plt entry, make room for the special
1660 s->size += PLT_FIRST_ENTRY_SIZE;
1662 h->plt.offset = s->size;
1664 /* If this symbol is not defined in a regular file, and we are
1665 not generating a shared library, then set the symbol to this
1666 location in the .plt. This is required to make function
1667 pointers compare as equal between the normal executable and
1668 the shared library. */
1669 if (! bfd_link_pic (info)
1672 h->root.u.def.section = s;
1673 h->root.u.def.value = h->plt.offset;
1676 /* Make room for this entry. */
1677 s->size += PLT_ENTRY_SIZE;
1679 /* We also need to make an entry in the .got.plt section, which
1680 will be placed in the .got section by the linker script. */
1681 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1683 /* We also need to make an entry in the .rela.plt section. */
1684 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1688 h->plt.offset = (bfd_vma) -1;
1690 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1695 h->plt.offset = (bfd_vma) -1;
1697 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1700 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1701 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1702 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1703 we can save the dynamic TLS relocation. */
1704 if (h->got.refcount > 0
1705 && !bfd_link_pic (info)
1707 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1709 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1710 /* For the GOTIE access without a literal pool entry the offset has
1711 to be stored somewhere. The immediate value in the instruction
1712 is not bit enough so the value is stored in the got. */
1714 h->got.offset = htab->elf.sgot->size;
1715 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1718 h->got.offset = (bfd_vma) -1;
1720 else if (h->got.refcount > 0)
1724 int tls_type = elf_s390_hash_entry(h)->tls_type;
1726 /* Make sure this symbol is output as a dynamic symbol.
1727 Undefined weak syms won't yet be marked as dynamic. */
1728 if (h->dynindx == -1
1729 && !h->forced_local)
1731 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1736 h->got.offset = s->size;
1737 s->size += GOT_ENTRY_SIZE;
1738 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1739 if (tls_type == GOT_TLS_GD)
1740 s->size += GOT_ENTRY_SIZE;
1741 dyn = htab->elf.dynamic_sections_created;
1742 /* R_390_TLS_IE32 needs one dynamic relocation,
1743 R_390_TLS_GD32 needs one if local symbol and two if global. */
1744 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1745 || tls_type >= GOT_TLS_IE)
1746 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1747 else if (tls_type == GOT_TLS_GD)
1748 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1749 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1750 || h->root.type != bfd_link_hash_undefweak)
1751 && (bfd_link_pic (info)
1752 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1753 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1756 h->got.offset = (bfd_vma) -1;
1758 if (eh->dyn_relocs == NULL)
1761 /* In the shared -Bsymbolic case, discard space allocated for
1762 dynamic pc-relative relocs against symbols which turn out to be
1763 defined in regular objects. For the normal shared case, discard
1764 space for pc-relative relocs that have become local due to symbol
1765 visibility changes. */
1767 if (bfd_link_pic (info))
1769 if (SYMBOL_CALLS_LOCAL (info, h))
1771 struct elf_dyn_relocs **pp;
1773 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1775 p->count -= p->pc_count;
1784 /* Also discard relocs on undefined weak syms with non-default
1786 if (eh->dyn_relocs != NULL
1787 && h->root.type == bfd_link_hash_undefweak)
1789 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1790 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1791 eh->dyn_relocs = NULL;
1793 /* Make sure undefined weak symbols are output as a dynamic
1795 else if (h->dynindx == -1
1796 && !h->forced_local)
1798 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1803 else if (ELIMINATE_COPY_RELOCS)
1805 /* For the non-shared case, discard space for relocs against
1806 symbols which turn out to need copy relocs or are not
1812 || (htab->elf.dynamic_sections_created
1813 && (h->root.type == bfd_link_hash_undefweak
1814 || h->root.type == bfd_link_hash_undefined))))
1816 /* Make sure this symbol is output as a dynamic symbol.
1817 Undefined weak syms won't yet be marked as dynamic. */
1818 if (h->dynindx == -1
1819 && !h->forced_local)
1821 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1825 /* If that succeeded, we know we'll be keeping all the
1827 if (h->dynindx != -1)
1831 eh->dyn_relocs = NULL;
1836 /* Finally, allocate space. */
1837 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1839 asection *sreloc = elf_section_data (p->sec)->sreloc;
1841 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1847 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1848 read-only sections. */
1851 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1855 if (h->root.type == bfd_link_hash_indirect)
1858 sec = readonly_dynrelocs (h);
1861 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1863 info->flags |= DF_TEXTREL;
1864 info->callbacks->minfo
1865 (_("%B: dynamic relocation against `%T' in read-only section `%A'\n"),
1866 sec->owner, h->root.root.string, sec);
1868 /* Not an error, just cut short the traversal. */
1874 /* Set the sizes of the dynamic sections. */
1877 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1878 struct bfd_link_info *info)
1880 struct elf_s390_link_hash_table *htab;
1886 htab = elf_s390_hash_table (info);
1887 dynobj = htab->elf.dynobj;
1891 if (htab->elf.dynamic_sections_created)
1893 /* Set the contents of the .interp section to the interpreter. */
1894 if (bfd_link_executable (info) && !info->nointerp)
1896 s = bfd_get_linker_section (dynobj, ".interp");
1899 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1900 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1904 /* Set up .got offsets for local syms, and space for local dynamic
1906 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1908 bfd_signed_vma *local_got;
1909 bfd_signed_vma *end_local_got;
1910 char *local_tls_type;
1911 bfd_size_type locsymcount;
1912 Elf_Internal_Shdr *symtab_hdr;
1914 struct plt_entry *local_plt;
1917 if (! is_s390_elf (ibfd))
1920 for (s = ibfd->sections; s != NULL; s = s->next)
1922 struct elf_dyn_relocs *p;
1924 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1926 if (!bfd_is_abs_section (p->sec)
1927 && bfd_is_abs_section (p->sec->output_section))
1929 /* Input section has been discarded, either because
1930 it is a copy of a linkonce section or due to
1931 linker script /DISCARD/, so we'll be discarding
1934 else if (p->count != 0)
1936 srela = elf_section_data (p->sec)->sreloc;
1937 srela->size += p->count * sizeof (Elf32_External_Rela);
1938 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1939 info->flags |= DF_TEXTREL;
1944 local_got = elf_local_got_refcounts (ibfd);
1948 symtab_hdr = &elf_symtab_hdr (ibfd);
1949 locsymcount = symtab_hdr->sh_info;
1950 end_local_got = local_got + locsymcount;
1951 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1953 srela = htab->elf.srelgot;
1954 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1958 *local_got = s->size;
1959 s->size += GOT_ENTRY_SIZE;
1960 if (*local_tls_type == GOT_TLS_GD)
1961 s->size += GOT_ENTRY_SIZE;
1962 if (bfd_link_pic (info))
1963 srela->size += sizeof (Elf32_External_Rela);
1966 *local_got = (bfd_vma) -1;
1968 local_plt = elf_s390_local_plt (ibfd);
1969 for (i = 0; i < symtab_hdr->sh_info; i++)
1971 if (local_plt[i].plt.refcount > 0)
1973 local_plt[i].plt.offset = htab->elf.iplt->size;
1974 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1975 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1976 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1979 local_plt[i].plt.offset = (bfd_vma) -1;
1983 if (htab->tls_ldm_got.refcount > 0)
1985 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1987 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1988 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1989 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1992 htab->tls_ldm_got.offset = -1;
1994 /* Allocate global sym .plt and .got entries, and space for global
1995 sym dynamic relocs. */
1996 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1998 /* We now have determined the sizes of the various dynamic sections.
1999 Allocate memory for them. */
2001 for (s = dynobj->sections; s != NULL; s = s->next)
2003 if ((s->flags & SEC_LINKER_CREATED) == 0)
2006 if (s == htab->elf.splt
2007 || s == htab->elf.sgot
2008 || s == htab->elf.sgotplt
2009 || s == htab->elf.sdynbss
2010 || s == htab->elf.sdynrelro
2011 || s == htab->elf.iplt
2012 || s == htab->elf.igotplt
2013 || s == htab->irelifunc)
2015 /* Strip this section if we don't need it; see the
2018 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2023 /* We use the reloc_count field as a counter if we need
2024 to copy relocs into the output file. */
2029 /* It's not one of our sections, so don't allocate space. */
2035 /* If we don't need this section, strip it from the
2036 output file. This is to handle .rela.bss and
2037 .rela.plt. We must create it in
2038 create_dynamic_sections, because it must be created
2039 before the linker maps input sections to output
2040 sections. The linker does that before
2041 adjust_dynamic_symbol is called, and it is that
2042 function which decides whether anything needs to go
2043 into these sections. */
2045 s->flags |= SEC_EXCLUDE;
2049 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2052 /* Allocate memory for the section contents. We use bfd_zalloc
2053 here in case unused entries are not reclaimed before the
2054 section's contents are written out. This should not happen,
2055 but this way if it does, we get a R_390_NONE reloc instead
2057 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2058 if (s->contents == NULL)
2062 if (htab->elf.dynamic_sections_created)
2064 /* Add some entries to the .dynamic section. We fill in the
2065 values later, in elf_s390_finish_dynamic_sections, but we
2066 must add the entries now so that we get the correct size for
2067 the .dynamic section. The DT_DEBUG entry is filled in by the
2068 dynamic linker and used by the debugger. */
2069 #define add_dynamic_entry(TAG, VAL) \
2070 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2072 if (bfd_link_executable (info))
2074 if (!add_dynamic_entry (DT_DEBUG, 0))
2078 if (htab->elf.splt->size != 0)
2080 if (!add_dynamic_entry (DT_PLTGOT, 0)
2081 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2082 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2083 || !add_dynamic_entry (DT_JMPREL, 0))
2089 if (!add_dynamic_entry (DT_RELA, 0)
2090 || !add_dynamic_entry (DT_RELASZ, 0)
2091 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2094 /* If any dynamic relocs apply to a read-only section,
2095 then we need a DT_TEXTREL entry. */
2096 if ((info->flags & DF_TEXTREL) == 0)
2097 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2099 if ((info->flags & DF_TEXTREL) != 0)
2101 if (!add_dynamic_entry (DT_TEXTREL, 0))
2106 #undef add_dynamic_entry
2111 /* Return the base VMA address which should be subtracted from real addresses
2112 when resolving @dtpoff relocation.
2113 This is PT_TLS segment p_vaddr. */
2116 dtpoff_base (struct bfd_link_info *info)
2118 /* If tls_sec is NULL, we should have signalled an error already. */
2119 if (elf_hash_table (info)->tls_sec == NULL)
2121 return elf_hash_table (info)->tls_sec->vma;
2124 /* Return the relocation value for @tpoff relocation
2125 if STT_TLS virtual address is ADDRESS. */
2128 tpoff (struct bfd_link_info *info, bfd_vma address)
2130 struct elf_link_hash_table *htab = elf_hash_table (info);
2132 /* If tls_sec is NULL, we should have signalled an error already. */
2133 if (htab->tls_sec == NULL)
2135 return htab->tls_size + htab->tls_sec->vma - address;
2138 /* Complain if TLS instruction relocation is against an invalid
2142 invalid_tls_insn (bfd *input_bfd,
2143 asection *input_section,
2144 Elf_Internal_Rela *rel)
2146 reloc_howto_type *howto;
2148 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2150 /* xgettext:c-format */
2151 (_("%B(%A+%#Lx): invalid instruction for TLS relocation %s"),
2156 bfd_set_error (bfd_error_bad_value);
2159 /* Relocate a 390 ELF section. */
2162 elf_s390_relocate_section (bfd *output_bfd,
2163 struct bfd_link_info *info,
2165 asection *input_section,
2167 Elf_Internal_Rela *relocs,
2168 Elf_Internal_Sym *local_syms,
2169 asection **local_sections)
2171 struct elf_s390_link_hash_table *htab;
2172 Elf_Internal_Shdr *symtab_hdr;
2173 struct elf_link_hash_entry **sym_hashes;
2174 bfd_vma *local_got_offsets;
2175 Elf_Internal_Rela *rel;
2176 Elf_Internal_Rela *relend;
2178 BFD_ASSERT (is_s390_elf (input_bfd));
2180 htab = elf_s390_hash_table (info);
2181 symtab_hdr = &elf_symtab_hdr (input_bfd);
2182 sym_hashes = elf_sym_hashes (input_bfd);
2183 local_got_offsets = elf_local_got_offsets (input_bfd);
2186 relend = relocs + input_section->reloc_count;
2187 for (; rel < relend; rel++)
2189 unsigned int r_type;
2190 reloc_howto_type *howto;
2191 unsigned long r_symndx;
2192 struct elf_link_hash_entry *h;
2193 Elf_Internal_Sym *sym;
2197 bfd_boolean unresolved_reloc;
2198 bfd_reloc_status_type r;
2200 asection *base_got = htab->elf.sgot;
2201 bfd_boolean resolved_to_zero;
2203 r_type = ELF32_R_TYPE (rel->r_info);
2204 if (r_type == (int) R_390_GNU_VTINHERIT
2205 || r_type == (int) R_390_GNU_VTENTRY)
2207 if (r_type >= (int) R_390_max)
2209 bfd_set_error (bfd_error_bad_value);
2213 howto = elf_howto_table + r_type;
2214 r_symndx = ELF32_R_SYM (rel->r_info);
2219 unresolved_reloc = FALSE;
2220 if (r_symndx < symtab_hdr->sh_info)
2222 sym = local_syms + r_symndx;
2223 sec = local_sections[r_symndx];
2224 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2226 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2227 if (local_plt == NULL)
2230 /* Address of the PLT slot. */
2231 relocation = (htab->elf.iplt->output_section->vma
2232 + htab->elf.iplt->output_offset
2233 + local_plt[r_symndx].plt.offset);
2237 case R_390_PLTOFF16:
2238 case R_390_PLTOFF32:
2239 relocation -= htab->elf.sgot->output_section->vma;
2241 case R_390_GOTPLT12:
2242 case R_390_GOTPLT16:
2243 case R_390_GOTPLT20:
2244 case R_390_GOTPLT32:
2245 case R_390_GOTPLTENT:
2252 /* Write the PLT slot address into the GOT slot. */
2253 bfd_put_32 (output_bfd, relocation,
2254 htab->elf.sgot->contents +
2255 local_got_offsets[r_symndx]);
2256 relocation = (local_got_offsets[r_symndx] +
2257 htab->elf.sgot->output_offset);
2259 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2260 relocation += htab->elf.sgot->output_section->vma;
2266 /* The output section is needed later in
2267 finish_dynamic_section when creating the dynamic
2269 local_plt[r_symndx].sec = sec;
2273 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2277 bfd_boolean warned ATTRIBUTE_UNUSED;
2278 bfd_boolean ignored ATTRIBUTE_UNUSED;
2280 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2281 r_symndx, symtab_hdr, sym_hashes,
2283 unresolved_reloc, warned, ignored);
2286 if (sec != NULL && discarded_section (sec))
2287 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2288 rel, 1, relend, howto, 0, contents);
2290 if (bfd_link_relocatable (info))
2293 resolved_to_zero = (h != NULL
2294 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2298 case R_390_GOTPLT12:
2299 case R_390_GOTPLT16:
2300 case R_390_GOTPLT20:
2301 case R_390_GOTPLT32:
2302 case R_390_GOTPLTENT:
2303 /* There are three cases for a GOTPLT relocation. 1) The
2304 relocation is against the jump slot entry of a plt that
2305 will get emitted to the output file. 2) The relocation
2306 is against the jump slot of a plt entry that has been
2307 removed. elf_s390_adjust_gotplt has created a GOT entry
2308 as replacement. 3) The relocation is against a local symbol.
2309 Cases 2) and 3) are the same as the GOT relocation code
2310 so we just have to test for case 1 and fall through for
2312 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2316 if (s390_is_ifunc_symbol_p (h))
2318 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2319 relocation = (plt_index * GOT_ENTRY_SIZE +
2320 htab->elf.igotplt->output_offset);
2321 if (r_type == R_390_GOTPLTENT)
2322 relocation += htab->elf.igotplt->output_section->vma;
2327 Current offset - size first entry / entry size. */
2328 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2331 /* Offset in GOT is PLT index plus GOT headers(3)
2332 times 4, addr & GOT addr. */
2333 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2334 if (r_type == R_390_GOTPLTENT)
2335 relocation += htab->elf.sgot->output_section->vma;
2337 unresolved_reloc = FALSE;
2347 /* Relocation is to the entry for this symbol in the global
2349 if (base_got == NULL)
2356 off = h->got.offset;
2357 dyn = htab->elf.dynamic_sections_created;
2359 if (s390_is_ifunc_symbol_p (h))
2361 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2362 if (off == (bfd_vma)-1)
2364 /* No explicit GOT usage so redirect to the
2366 base_got = htab->elf.igotplt;
2367 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2371 /* Explicit GOT slots must contain the address
2372 of the PLT slot. This will be handled in
2373 finish_dynamic_symbol. */
2376 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2377 bfd_link_pic (info),
2379 || (bfd_link_pic (info)
2380 && SYMBOL_REFERENCES_LOCAL (info, h))
2381 || (ELF_ST_VISIBILITY (h->other)
2382 && h->root.type == bfd_link_hash_undefweak))
2385 /* This is actually a static link, or it is a
2386 -Bsymbolic link and the symbol is defined
2387 locally, or the symbol was forced to be local
2388 because of a version file. We must initialize
2389 this entry in the global offset table. Since the
2390 offset must always be a multiple of 2, we use the
2391 least significant bit to record whether we have
2392 initialized it already.
2394 When doing a dynamic link, we create a .rel.got
2395 relocation entry to initialize the value. This
2396 is done in the finish_dynamic_symbol routine. */
2401 bfd_put_32 (output_bfd, relocation,
2402 base_got->contents + off);
2407 && bfd_link_pic (info)
2408 && SYMBOL_REFERENCES_LOCAL (info, h))
2409 /* lrl rx,sym@GOTENT -> larl rx, sym */
2410 && ((r_type == R_390_GOTENT
2411 && (bfd_get_16 (input_bfd,
2412 contents + rel->r_offset - 2)
2413 & 0xff0f) == 0xc40d)
2414 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2415 || (r_type == R_390_GOT20
2416 && (bfd_get_32 (input_bfd,
2417 contents + rel->r_offset - 2)
2418 & 0xff00f000) == 0xe300c000
2419 && bfd_get_8 (input_bfd,
2420 contents + rel->r_offset + 3) == 0x58)))
2422 unsigned short new_insn =
2423 (0xc000 | (bfd_get_8 (input_bfd,
2424 contents + rel->r_offset - 1) & 0xf0));
2425 bfd_put_16 (output_bfd, new_insn,
2426 contents + rel->r_offset - 2);
2427 r_type = R_390_PC32DBL;
2429 howto = elf_howto_table + r_type;
2430 relocation = h->root.u.def.value
2431 + h->root.u.def.section->output_section->vma
2432 + h->root.u.def.section->output_offset;
2437 unresolved_reloc = FALSE;
2441 if (local_got_offsets == NULL)
2444 off = local_got_offsets[r_symndx];
2446 /* The offset must always be a multiple of 4. We use
2447 the least significant bit to record whether we have
2448 already generated the necessary reloc. */
2453 bfd_put_32 (output_bfd, relocation,
2454 htab->elf.sgot->contents + off);
2456 if (bfd_link_pic (info))
2459 Elf_Internal_Rela outrel;
2462 srelgot = htab->elf.srelgot;
2463 if (srelgot == NULL)
2466 outrel.r_offset = (htab->elf.sgot->output_section->vma
2467 + htab->elf.sgot->output_offset
2469 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2470 outrel.r_addend = relocation;
2471 loc = srelgot->contents;
2472 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2473 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2476 local_got_offsets[r_symndx] |= 1;
2480 if (off >= (bfd_vma) -2)
2483 relocation = base_got->output_offset + off;
2485 /* For @GOTENT the relocation is against the offset between
2486 the instruction and the symbols entry in the GOT and not
2487 between the start of the GOT and the symbols entry. We
2488 add the vma of the GOT to get the correct value. */
2489 if ( r_type == R_390_GOTENT
2490 || r_type == R_390_GOTPLTENT)
2491 relocation += base_got->output_section->vma;
2495 case R_390_GOTOFF16:
2496 case R_390_GOTOFF32:
2497 /* Relocation is relative to the start of the global offset
2501 && s390_is_ifunc_symbol_p (h)
2503 && !bfd_link_executable (info))
2505 relocation = (htab->elf.iplt->output_section->vma
2506 + htab->elf.iplt->output_offset
2508 - htab->elf.sgot->output_section->vma);
2512 /* Note that sgot->output_offset is not involved in this
2513 calculation. We always want the start of .got. If we
2514 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2515 permitted by the ABI, we might have to change this
2517 relocation -= htab->elf.sgot->output_section->vma;
2521 case R_390_GOTPCDBL:
2522 /* Use global offset table as symbol value. */
2523 relocation = htab->elf.sgot->output_section->vma;
2524 unresolved_reloc = FALSE;
2527 case R_390_PLT12DBL:
2528 case R_390_PLT16DBL:
2529 case R_390_PLT24DBL:
2530 case R_390_PLT32DBL:
2532 /* Relocation is to the entry for this symbol in the
2533 procedure linkage table. */
2535 /* Resolve a PLT32 reloc against a local symbol directly,
2536 without using the procedure linkage table. */
2540 if (h->plt.offset == (bfd_vma) -1
2541 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2543 /* We didn't make a PLT entry for this symbol. This
2544 happens when statically linking PIC code, or when
2545 using -Bsymbolic. */
2549 if (s390_is_ifunc_symbol_p (h))
2550 relocation = (htab->elf.iplt->output_section->vma
2551 + htab->elf.iplt->output_offset
2554 relocation = (htab->elf.splt->output_section->vma
2555 + htab->elf.splt->output_offset
2557 unresolved_reloc = FALSE;
2560 case R_390_PLTOFF16:
2561 case R_390_PLTOFF32:
2562 /* Relocation is to the entry for this symbol in the
2563 procedure linkage table relative to the start of the GOT. */
2565 /* For local symbols or if we didn't make a PLT entry for
2566 this symbol resolve the symbol directly. */
2568 || h->plt.offset == (bfd_vma) -1
2569 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2571 relocation -= htab->elf.sgot->output_section->vma;
2575 if (s390_is_ifunc_symbol_p (h))
2576 relocation = (htab->elf.iplt->output_section->vma
2577 + htab->elf.iplt->output_offset
2579 - htab->elf.sgot->output_section->vma);
2581 relocation = (htab->elf.splt->output_section->vma
2582 + htab->elf.splt->output_offset
2584 - htab->elf.sgot->output_section->vma);
2585 unresolved_reloc = FALSE;
2595 && s390_is_ifunc_symbol_p (h)
2597 && !bfd_link_executable (info))
2599 /* This will not work our if the function does not
2600 happen to set up the GOT pointer for some other
2601 reason. 31 bit PLT entries require r12 to hold the
2603 FIXME: Implement an errorcheck.
2604 NOTE: It will work when brasl is not available
2605 (e.g. with -m31 -march=g5) since a local function
2606 call then does use GOTOFF which implies r12 being set
2608 relocation = (htab->elf.iplt->output_section->vma
2609 + htab->elf.iplt->output_offset
2619 && s390_is_ifunc_symbol_p (h)
2622 if (!bfd_link_pic (info))
2624 /* For a non-shared object STT_GNU_IFUNC symbol must
2626 relocation = (htab->elf.iplt->output_section->vma
2627 + htab->elf.iplt->output_offset
2633 /* For shared objects a runtime relocation is needed. */
2635 Elf_Internal_Rela outrel;
2638 /* Need a dynamic relocation to get the real function
2640 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2644 if (outrel.r_offset == (bfd_vma) -1
2645 || outrel.r_offset == (bfd_vma) -2)
2648 outrel.r_offset += (input_section->output_section->vma
2649 + input_section->output_offset);
2651 if (h->dynindx == -1
2653 || bfd_link_executable (info))
2655 /* This symbol is resolved locally. */
2656 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2657 outrel.r_addend = (h->root.u.def.value
2658 + h->root.u.def.section->output_section->vma
2659 + h->root.u.def.section->output_offset);
2663 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2664 outrel.r_addend = 0;
2667 sreloc = htab->elf.irelifunc;
2668 elf_append_rela (output_bfd, sreloc, &outrel);
2670 /* If this reloc is against an external symbol, we
2671 do not want to fiddle with the addend. Otherwise,
2672 we need to include the symbol value so that it
2673 becomes an addend for the dynamic reloc. For an
2674 internal symbol, we have updated addend. */
2679 if ((input_section->flags & SEC_ALLOC) == 0)
2682 if ((bfd_link_pic (info)
2684 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2685 && !resolved_to_zero)
2686 || h->root.type != bfd_link_hash_undefweak)
2687 && ((r_type != R_390_PC16
2688 && r_type != R_390_PC12DBL
2689 && r_type != R_390_PC16DBL
2690 && r_type != R_390_PC24DBL
2691 && r_type != R_390_PC32DBL
2692 && r_type != R_390_PC32)
2693 || !SYMBOL_CALLS_LOCAL (info, h)))
2694 || (ELIMINATE_COPY_RELOCS
2695 && !bfd_link_pic (info)
2701 || h->root.type == bfd_link_hash_undefweak
2702 || h->root.type == bfd_link_hash_undefined)))
2704 Elf_Internal_Rela outrel;
2705 bfd_boolean skip, relocate;
2709 /* When generating a shared object, these relocations
2710 are copied into the output file to be resolved at run
2717 _bfd_elf_section_offset (output_bfd, info, input_section,
2719 if (outrel.r_offset == (bfd_vma) -1)
2721 else if (outrel.r_offset == (bfd_vma) -2)
2722 skip = TRUE, relocate = TRUE;
2723 outrel.r_offset += (input_section->output_section->vma
2724 + input_section->output_offset);
2727 memset (&outrel, 0, sizeof outrel);
2730 && (r_type == R_390_PC16
2731 || r_type == R_390_PC12DBL
2732 || r_type == R_390_PC16DBL
2733 || r_type == R_390_PC24DBL
2734 || r_type == R_390_PC32DBL
2735 || r_type == R_390_PC32
2736 || !bfd_link_pic (info)
2737 || !SYMBOLIC_BIND (info, h)
2738 || !h->def_regular))
2740 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2741 outrel.r_addend = rel->r_addend;
2745 /* This symbol is local, or marked to become local. */
2746 outrel.r_addend = relocation + rel->r_addend;
2747 if (r_type == R_390_32)
2750 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2756 if (bfd_is_abs_section (sec))
2758 else if (sec == NULL || sec->owner == NULL)
2760 bfd_set_error(bfd_error_bad_value);
2767 osec = sec->output_section;
2768 sindx = elf_section_data (osec)->dynindx;
2771 osec = htab->elf.text_index_section;
2772 sindx = elf_section_data (osec)->dynindx;
2774 BFD_ASSERT (sindx != 0);
2776 /* We are turning this relocation into one
2777 against a section symbol, so subtract out
2778 the output section's address but not the
2779 offset of the input section in the output
2781 outrel.r_addend -= osec->vma;
2783 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2787 sreloc = elf_section_data (input_section)->sreloc;
2791 loc = sreloc->contents;
2792 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2793 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2795 /* If this reloc is against an external symbol, we do
2796 not want to fiddle with the addend. Otherwise, we
2797 need to include the symbol value so that it becomes
2798 an addend for the dynamic reloc. */
2804 /* Relocations for tls literal pool entries. */
2805 case R_390_TLS_IE32:
2806 if (bfd_link_pic (info))
2808 Elf_Internal_Rela outrel;
2812 outrel.r_offset = rel->r_offset
2813 + input_section->output_section->vma
2814 + input_section->output_offset;
2815 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2816 sreloc = elf_section_data (input_section)->sreloc;
2819 loc = sreloc->contents;
2820 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2821 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2825 case R_390_TLS_GD32:
2826 case R_390_TLS_GOTIE32:
2827 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2828 tls_type = GOT_UNKNOWN;
2829 if (h == NULL && local_got_offsets)
2830 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2833 tls_type = elf_s390_hash_entry(h)->tls_type;
2834 if (!bfd_link_pic (info)
2836 && tls_type >= GOT_TLS_IE)
2837 r_type = R_390_TLS_LE32;
2839 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2840 r_type = R_390_TLS_IE32;
2842 if (r_type == R_390_TLS_LE32)
2844 /* This relocation gets optimized away by the local exec
2845 access optimization. */
2846 BFD_ASSERT (! unresolved_reloc);
2847 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2848 contents + rel->r_offset);
2852 if (htab->elf.sgot == NULL)
2856 off = h->got.offset;
2859 if (local_got_offsets == NULL)
2862 off = local_got_offsets[r_symndx];
2871 Elf_Internal_Rela outrel;
2875 if (htab->elf.srelgot == NULL)
2878 outrel.r_offset = (htab->elf.sgot->output_section->vma
2879 + htab->elf.sgot->output_offset + off);
2881 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2882 if (r_type == R_390_TLS_GD32)
2883 dr_type = R_390_TLS_DTPMOD;
2885 dr_type = R_390_TLS_TPOFF;
2886 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2887 outrel.r_addend = relocation - dtpoff_base (info);
2889 outrel.r_addend = 0;
2890 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2891 loc = htab->elf.srelgot->contents;
2892 loc += htab->elf.srelgot->reloc_count++
2893 * sizeof (Elf32_External_Rela);
2894 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2896 if (r_type == R_390_TLS_GD32)
2900 BFD_ASSERT (! unresolved_reloc);
2901 bfd_put_32 (output_bfd,
2902 relocation - dtpoff_base (info),
2903 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2907 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2908 outrel.r_offset += GOT_ENTRY_SIZE;
2909 outrel.r_addend = 0;
2910 htab->elf.srelgot->reloc_count++;
2911 loc += sizeof (Elf32_External_Rela);
2912 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2919 local_got_offsets[r_symndx] |= 1;
2922 if (off >= (bfd_vma) -2)
2924 if (r_type == ELF32_R_TYPE (rel->r_info))
2926 relocation = htab->elf.sgot->output_offset + off;
2927 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2928 relocation += htab->elf.sgot->output_section->vma;
2929 unresolved_reloc = FALSE;
2933 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2934 contents + rel->r_offset);
2939 case R_390_TLS_GOTIE12:
2940 case R_390_TLS_GOTIE20:
2941 case R_390_TLS_IEENT:
2944 if (local_got_offsets == NULL)
2946 off = local_got_offsets[r_symndx];
2947 if (bfd_link_pic (info))
2948 goto emit_tls_relocs;
2952 off = h->got.offset;
2953 tls_type = elf_s390_hash_entry(h)->tls_type;
2954 if (bfd_link_pic (info)
2956 || tls_type < GOT_TLS_IE)
2957 goto emit_tls_relocs;
2960 if (htab->elf.sgot == NULL)
2963 BFD_ASSERT (! unresolved_reloc);
2964 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2965 htab->elf.sgot->contents + off);
2966 relocation = htab->elf.sgot->output_offset + off;
2967 if (r_type == R_390_TLS_IEENT)
2968 relocation += htab->elf.sgot->output_section->vma;
2969 unresolved_reloc = FALSE;
2972 case R_390_TLS_LDM32:
2973 if (! bfd_link_pic (info))
2974 /* The literal pool entry this relocation refers to gets ignored
2975 by the optimized code of the local exec model. Do nothing
2976 and the value will turn out zero. */
2979 if (htab->elf.sgot == NULL)
2982 off = htab->tls_ldm_got.offset;
2987 Elf_Internal_Rela outrel;
2990 if (htab->elf.srelgot == NULL)
2993 outrel.r_offset = (htab->elf.sgot->output_section->vma
2994 + htab->elf.sgot->output_offset + off);
2996 bfd_put_32 (output_bfd, 0,
2997 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2998 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2999 outrel.r_addend = 0;
3000 loc = htab->elf.srelgot->contents;
3001 loc += htab->elf.srelgot->reloc_count++
3002 * sizeof (Elf32_External_Rela);
3003 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3004 htab->tls_ldm_got.offset |= 1;
3006 relocation = htab->elf.sgot->output_offset + off;
3007 unresolved_reloc = FALSE;
3010 case R_390_TLS_LE32:
3011 if (bfd_link_dll (info))
3013 /* Linking a shared library with non-fpic code requires
3014 a R_390_TLS_TPOFF relocation. */
3015 Elf_Internal_Rela outrel;
3020 outrel.r_offset = rel->r_offset
3021 + input_section->output_section->vma
3022 + input_section->output_offset;
3023 if (h != NULL && h->dynindx != -1)
3027 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3029 outrel.r_addend = relocation - dtpoff_base (info);
3031 outrel.r_addend = 0;
3032 sreloc = elf_section_data (input_section)->sreloc;
3035 loc = sreloc->contents;
3036 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3037 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3041 BFD_ASSERT (! unresolved_reloc);
3042 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3043 contents + rel->r_offset);
3047 case R_390_TLS_LDO32:
3048 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3049 relocation -= dtpoff_base (info);
3051 /* When converting LDO to LE, we must negate. */
3052 relocation = -tpoff (info, relocation);
3055 /* Relocations for tls instructions. */
3056 case R_390_TLS_LOAD:
3057 case R_390_TLS_GDCALL:
3058 case R_390_TLS_LDCALL:
3059 tls_type = GOT_UNKNOWN;
3060 if (h == NULL && local_got_offsets)
3061 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3063 tls_type = elf_s390_hash_entry(h)->tls_type;
3065 if (tls_type == GOT_TLS_GD)
3068 if (r_type == R_390_TLS_LOAD)
3070 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3072 /* IE->LE transition. Four valid cases:
3073 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3074 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3075 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3076 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3077 unsigned int insn, ry;
3079 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3080 if ((insn & 0xff00f000) == 0x58000000)
3081 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3082 ry = (insn & 0x000f0000);
3083 else if ((insn & 0xff0f0000) == 0x58000000)
3084 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3085 ry = (insn & 0x0000f000) << 4;
3086 else if ((insn & 0xff00f000) == 0x5800c000)
3087 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3088 ry = (insn & 0x000f0000);
3089 else if ((insn & 0xff0f0000) == 0x580c0000)
3090 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3091 ry = (insn & 0x0000f000) << 4;
3094 invalid_tls_insn (input_bfd, input_section, rel);
3097 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3098 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3101 else if (r_type == R_390_TLS_GDCALL)
3105 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3106 if ((insn & 0xff000fff) != 0x4d000000 &&
3107 (insn & 0xffff0000) != 0xc0e50000 &&
3108 (insn & 0xff000000) != 0x0d000000)
3110 invalid_tls_insn (input_bfd, input_section, rel);
3113 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3115 if ((insn & 0xff000000) == 0x0d000000)
3117 /* GD->LE transition.
3118 basr rx, ry -> nopr r7 */
3119 insn = 0x07070000 | (insn & 0xffff);
3121 else if ((insn & 0xff000000) == 0x4d000000)
3123 /* GD->LE transition.
3124 bas %r14,0(%rx,%r13) -> bc 0,0 */
3129 /* GD->LE transition.
3130 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3132 bfd_put_16 (output_bfd, 0x0000,
3133 contents + rel->r_offset + 4);
3138 /* If basr is used in the pic case to invoke
3139 _tls_get_offset, something went wrong before. */
3140 if ((insn & 0xff000000) == 0x0d000000)
3142 invalid_tls_insn (input_bfd, input_section, rel);
3146 if ((insn & 0xff000000) == 0x4d000000)
3148 /* GD->IE transition.
3149 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3154 /* GD->IE transition.
3155 brasl %r14,__tls_get_addr@plt ->
3156 l %r2,0(%r2,%r12) ; bcr 0,0 */
3158 bfd_put_16 (output_bfd, 0x0700,
3159 contents + rel->r_offset + 4);
3162 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3164 else if (r_type == R_390_TLS_LDCALL)
3166 if (!bfd_link_pic (info))
3170 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3171 if ((insn & 0xff000fff) != 0x4d000000 &&
3172 (insn & 0xffff0000) != 0xc0e50000 &&
3173 (insn & 0xff000000) != 0x0d000000)
3175 invalid_tls_insn (input_bfd, input_section, rel);
3179 if ((insn & 0xff000000) == 0x0d000000)
3181 /* LD->LE transition.
3182 basr rx, ry -> nopr r7 */
3183 insn = 0x07070000 | (insn & 0xffff);
3185 else if ((insn & 0xff000000) == 0x4d000000)
3187 /* LD->LE transition.
3188 bas %r14,0(%rx,%r13) -> bc 0,0 */
3193 /* LD->LE transition.
3194 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3196 bfd_put_16 (output_bfd, 0x0000,
3197 contents + rel->r_offset + 4);
3199 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3208 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3209 because such sections are not SEC_ALLOC and thus ld.so will
3210 not process them. */
3211 if (unresolved_reloc
3212 && !((input_section->flags & SEC_DEBUGGING) != 0
3214 && _bfd_elf_section_offset (output_bfd, info, input_section,
3215 rel->r_offset) != (bfd_vma) -1)
3217 /* xgettext:c-format */
3218 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3223 h->root.root.string);
3227 /* When applying a 24 bit reloc we need to start one byte
3228 earlier. Otherwise the 32 bit get/put bfd operations might
3229 access a byte after the actual section. */
3230 if (r_type == R_390_PC24DBL
3231 || r_type == R_390_PLT24DBL)
3234 if (r_type == R_390_20
3235 || r_type == R_390_GOT20
3236 || r_type == R_390_GOTPLT20
3237 || r_type == R_390_TLS_GOTIE20)
3239 relocation += rel->r_addend;
3240 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3241 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3242 contents, rel->r_offset,
3246 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3247 contents, rel->r_offset,
3248 relocation, rel->r_addend);
3250 if (r != bfd_reloc_ok)
3255 name = h->root.root.string;
3258 name = bfd_elf_string_from_elf_section (input_bfd,
3259 symtab_hdr->sh_link,
3264 name = bfd_section_name (input_bfd, sec);
3267 if (r == bfd_reloc_overflow)
3268 (*info->callbacks->reloc_overflow)
3269 (info, (h ? &h->root : NULL), name, howto->name,
3270 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3274 /* xgettext:c-format */
3275 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3276 input_bfd, input_section,
3277 rel->r_offset, name, (int) r);
3286 /* Generate the PLT slots together with the dynamic relocations needed
3287 for IFUNC symbols. */
3290 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3291 struct bfd_link_info *info,
3292 struct elf_link_hash_entry *h,
3293 struct elf_s390_link_hash_table *htab,
3294 bfd_vma iplt_offset,
3295 bfd_vma resolver_address)
3299 bfd_vma igotiplt_offset;
3300 Elf_Internal_Rela rela;
3302 asection *plt, *gotplt, *relplt;
3303 bfd_vma relative_offset;
3305 if (htab->elf.iplt == NULL
3306 || htab->elf.igotplt == NULL
3307 || htab->elf.irelplt == NULL)
3310 gotplt = htab->elf.igotplt;
3311 relplt = htab->elf.irelplt;
3313 /* Index of the PLT slot within iplt section. */
3314 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3315 plt = htab->elf.iplt;
3316 /* Offset into the igot.plt section. */
3317 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3318 /* Offset into the got section. */
3319 got_offset = igotiplt_offset + gotplt->output_offset;
3321 /* S390 uses halfwords for relative branch calc! */
3322 relative_offset = - (plt->output_offset +
3323 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3324 /* If offset is > 32768, branch to a previous branch
3325 390 can only handle +-64 K jumps. */
3326 if ( -32768 > (int) relative_offset )
3328 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3330 /* Fill in the entry in the procedure linkage table. */
3331 if (!bfd_link_pic (info))
3333 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3336 /* Adjust jump to the first plt entry. */
3337 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3338 plt->contents + iplt_offset + 20);
3340 /* Push the GOT offset field. */
3341 bfd_put_32 (output_bfd,
3342 (gotplt->output_section->vma
3344 plt->contents + iplt_offset + 24);
3346 else if (got_offset < 4096)
3348 /* The GOT offset is small enough to be used directly as
3350 memcpy (plt->contents + iplt_offset,
3351 elf_s390_plt_pic12_entry,
3354 /* Put in the GOT offset as displacement value. The 0xc000
3355 value comes from the first word of the plt entry. Look
3356 at the elf_s390_plt_pic16_entry content. */
3357 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3358 plt->contents + iplt_offset + 2);
3360 /* Adjust the jump to the first plt entry. */
3361 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3362 plt->contents + iplt_offset + 20);
3364 else if (got_offset < 32768)
3366 /* The GOT offset is too big for a displacement but small
3367 enough to be a signed 16 bit immediate value as it can be
3368 used in an lhi instruction. */
3369 memcpy (plt->contents + iplt_offset,
3370 elf_s390_plt_pic16_entry,
3373 /* Put in the GOT offset for the lhi instruction. */
3374 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3375 plt->contents + iplt_offset + 2);
3377 /* Adjust the jump to the first plt entry. */
3378 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3379 plt->contents + iplt_offset + 20);
3383 memcpy (plt->contents + iplt_offset,
3384 elf_s390_plt_pic_entry,
3387 /* Adjust the jump to the first plt entry. */
3388 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3389 plt->contents + iplt_offset + 20);
3391 /* Push the GOT offset field. */
3392 bfd_put_32 (output_bfd, got_offset,
3393 plt->contents + iplt_offset + 24);
3395 /* Insert offset into reloc. table here. */
3396 bfd_put_32 (output_bfd, relplt->output_offset +
3397 iplt_index * RELA_ENTRY_SIZE,
3398 plt->contents + iplt_offset + 28);
3400 /* Fill in the entry in the global offset table.
3401 Points to instruction after GOT offset. */
3402 bfd_put_32 (output_bfd,
3403 (plt->output_section->vma
3404 + plt->output_offset
3407 gotplt->contents + igotiplt_offset);
3409 /* Fill in the entry in the .rela.plt section. */
3410 rela.r_offset = gotplt->output_section->vma + got_offset;
3414 || ((bfd_link_executable (info)
3415 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3418 /* The symbol can be locally resolved. */
3419 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3420 rela.r_addend = resolver_address;
3424 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3428 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3429 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3432 /* Finish up dynamic symbol handling. We set the contents of various
3433 dynamic sections here. */
3436 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3437 struct bfd_link_info *info,
3438 struct elf_link_hash_entry *h,
3439 Elf_Internal_Sym *sym)
3441 struct elf_s390_link_hash_table *htab;
3442 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3444 htab = elf_s390_hash_table (info);
3446 if (h->plt.offset != (bfd_vma) -1)
3450 Elf_Internal_Rela rela;
3452 bfd_vma relative_offset;
3454 /* This symbol has an entry in the procedure linkage table. Set
3456 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3458 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3459 htab, h->plt.offset,
3460 eh->ifunc_resolver_address +
3461 eh->ifunc_resolver_section->output_offset +
3462 eh->ifunc_resolver_section->output_section->vma);
3463 /* Do not return yet. Handling of explicit GOT slots of
3464 IFUNC symbols is below. */
3468 if (h->dynindx == -1
3469 || htab->elf.splt == NULL
3470 || htab->elf.sgotplt == NULL
3471 || htab->elf.srelplt == NULL)
3475 Current offset - size first entry / entry size. */
3476 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3478 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3480 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3482 /* S390 uses halfwords for relative branch calc! */
3483 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3484 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3485 /* If offset is > 32768, branch to a previous branch
3486 390 can only handle +-64 K jumps. */
3487 if ( -32768 > (int) relative_offset )
3489 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3491 /* Fill in the entry in the procedure linkage table. */
3492 if (!bfd_link_pic (info))
3494 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3497 /* Adjust jump to the first plt entry. */
3498 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3499 htab->elf.splt->contents + h->plt.offset + 20);
3501 /* Push the GOT offset field. */
3502 bfd_put_32 (output_bfd,
3503 (htab->elf.sgotplt->output_section->vma
3504 + htab->elf.sgotplt->output_offset
3506 htab->elf.splt->contents + h->plt.offset + 24);
3508 else if (got_offset < 4096)
3510 /* The GOT offset is small enough to be used directly as
3512 memcpy (htab->elf.splt->contents + h->plt.offset,
3513 elf_s390_plt_pic12_entry,
3516 /* Put in the GOT offset as displacement value. The 0xc000
3517 value comes from the first word of the plt entry. Look
3518 at the elf_s390_plt_pic12_entry content. */
3519 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3520 htab->elf.splt->contents + h->plt.offset + 2);
3522 /* Adjust the jump to the first plt entry. */
3523 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3524 htab->elf.splt->contents + h->plt.offset + 20);
3526 else if (got_offset < 32768)
3528 /* The GOT offset is too big for a displacement but small
3529 enough to be a signed 16 bit immediate value as it can be
3530 used in an lhi instruction. */
3531 memcpy (htab->elf.splt->contents + h->plt.offset,
3532 elf_s390_plt_pic16_entry,
3535 /* Put in the GOT offset for the lhi instruction. */
3536 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3537 htab->elf.splt->contents + h->plt.offset + 2);
3539 /* Adjust the jump to the first plt entry. */
3540 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3541 htab->elf.splt->contents + h->plt.offset + 20);
3545 memcpy (htab->elf.splt->contents + h->plt.offset,
3546 elf_s390_plt_pic_entry,
3549 /* Adjust the jump to the first plt entry. */
3550 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3551 htab->elf.splt->contents + h->plt.offset + 20);
3553 /* Push the GOT offset field. */
3554 bfd_put_32 (output_bfd, got_offset,
3555 htab->elf.splt->contents + h->plt.offset + 24);
3557 /* Insert offset into reloc. table here. */
3558 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3559 htab->elf.splt->contents + h->plt.offset + 28);
3561 /* Fill in the entry in the global offset table.
3562 Points to instruction after GOT offset. */
3563 bfd_put_32 (output_bfd,
3564 (htab->elf.splt->output_section->vma
3565 + htab->elf.splt->output_offset
3568 htab->elf.sgotplt->contents + got_offset);
3570 /* Fill in the entry in the .rela.plt section. */
3571 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3572 + htab->elf.sgotplt->output_offset
3574 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3576 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3577 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3579 if (!h->def_regular)
3581 /* Mark the symbol as undefined, rather than as defined in
3582 the .plt section. Leave the value alone. This is a clue
3583 for the dynamic linker, to make function pointer
3584 comparisons work between an application and shared
3586 sym->st_shndx = SHN_UNDEF;
3591 if (h->got.offset != (bfd_vma) -1
3592 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3593 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3594 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3596 Elf_Internal_Rela rela;
3599 /* This symbol has an entry in the global offset table. Set it
3602 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3605 rela.r_offset = (htab->elf.sgot->output_section->vma
3606 + htab->elf.sgot->output_offset
3607 + (h->got.offset &~ (bfd_vma) 1));
3609 /* If this is a static link, or it is a -Bsymbolic link and the
3610 symbol is defined locally or was forced to be local because
3611 of a version file, we just want to emit a RELATIVE reloc.
3612 The entry in the global offset table will already have been
3613 initialized in the relocate_section function. */
3614 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3616 if (bfd_link_pic (info))
3618 /* An explicit GOT slot usage needs GLOB_DAT. If the
3619 symbol references local the implicit got.iplt slot
3620 will be used and the IRELATIVE reloc has been created
3626 /* For non-shared objects explicit GOT slots must be
3627 filled with the PLT slot address for pointer
3628 equality reasons. */
3629 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3630 + htab->elf.iplt->output_offset
3632 htab->elf.sgot->contents + h->got.offset);
3636 else if (bfd_link_pic (info)
3637 && SYMBOL_REFERENCES_LOCAL (info, h))
3639 /* If this is a static link, or it is a -Bsymbolic link and
3640 the symbol is defined locally or was forced to be local
3641 because of a version file, we just want to emit a
3642 RELATIVE reloc. The entry in the global offset table
3643 will already have been initialized in the
3644 relocate_section function. */
3645 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3647 BFD_ASSERT((h->got.offset & 1) != 0);
3648 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3649 rela.r_addend = (h->root.u.def.value
3650 + h->root.u.def.section->output_section->vma
3651 + h->root.u.def.section->output_offset);
3655 BFD_ASSERT((h->got.offset & 1) == 0);
3657 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3658 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3662 loc = htab->elf.srelgot->contents;
3663 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3664 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3669 Elf_Internal_Rela rela;
3673 /* This symbols needs a copy reloc. Set it up. */
3675 if (h->dynindx == -1
3676 || (h->root.type != bfd_link_hash_defined
3677 && h->root.type != bfd_link_hash_defweak)
3678 || htab->elf.srelbss == NULL
3679 || htab->elf.sreldynrelro == NULL)
3682 rela.r_offset = (h->root.u.def.value
3683 + h->root.u.def.section->output_section->vma
3684 + h->root.u.def.section->output_offset);
3685 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3687 if (h->root.u.def.section == htab->elf.sdynrelro)
3688 s = htab->elf.sreldynrelro;
3690 s = htab->elf.srelbss;
3691 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3692 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3695 /* Mark some specially defined symbols as absolute. */
3696 if (h == htab->elf.hdynamic
3697 || h == htab->elf.hgot
3698 || h == htab->elf.hplt)
3699 sym->st_shndx = SHN_ABS;
3704 /* Used to decide how to sort relocs in an optimal manner for the
3705 dynamic linker, before writing them out. */
3707 static enum elf_reloc_type_class
3708 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3709 const asection *rel_sec ATTRIBUTE_UNUSED,
3710 const Elf_Internal_Rela *rela)
3712 bfd *abfd = info->output_bfd;
3713 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3714 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3715 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3716 Elf_Internal_Sym sym;
3718 if (htab->elf.dynsym == NULL
3719 || !bed->s->swap_symbol_in (abfd,
3720 (htab->elf.dynsym->contents
3721 + r_symndx * bed->s->sizeof_sym),
3725 /* Check relocation against STT_GNU_IFUNC symbol. */
3726 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3727 return reloc_class_ifunc;
3729 switch ((int) ELF32_R_TYPE (rela->r_info))
3731 case R_390_RELATIVE:
3732 return reloc_class_relative;
3733 case R_390_JMP_SLOT:
3734 return reloc_class_plt;
3736 return reloc_class_copy;
3738 return reloc_class_normal;
3742 /* Finish up the dynamic sections. */
3745 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3746 struct bfd_link_info *info)
3748 struct elf_s390_link_hash_table *htab;
3754 htab = elf_s390_hash_table (info);
3755 dynobj = htab->elf.dynobj;
3756 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3758 if (htab->elf.dynamic_sections_created)
3760 Elf32_External_Dyn *dyncon, *dynconend;
3762 if (sdyn == NULL || htab->elf.sgot == NULL)
3765 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3766 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3767 for (; dyncon < dynconend; dyncon++)
3769 Elf_Internal_Dyn dyn;
3772 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3780 s = htab->elf.sgotplt;
3781 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3785 s = htab->elf.srelplt;
3786 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3790 dyn.d_un.d_val = htab->elf.srelplt->size;
3791 if (htab->elf.irelplt)
3792 dyn.d_un.d_val += htab->elf.irelplt->size;
3796 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3799 /* Fill in the special first entry in the procedure linkage table. */
3800 if (htab->elf.splt && htab->elf.splt->size > 0)
3802 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3803 if (bfd_link_pic (info))
3805 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3806 PLT_FIRST_ENTRY_SIZE);
3810 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3811 PLT_FIRST_ENTRY_SIZE);
3812 bfd_put_32 (output_bfd,
3813 htab->elf.sgotplt->output_section->vma
3814 + htab->elf.sgotplt->output_offset,
3815 htab->elf.splt->contents + 24);
3817 elf_section_data (htab->elf.splt->output_section)
3818 ->this_hdr.sh_entsize = 4;
3823 if (htab->elf.sgotplt)
3825 /* Fill in the first three entries in the global offset table. */
3826 if (htab->elf.sgotplt->size > 0)
3828 bfd_put_32 (output_bfd,
3829 (sdyn == NULL ? (bfd_vma) 0
3830 : sdyn->output_section->vma + sdyn->output_offset),
3831 htab->elf.sgotplt->contents);
3832 /* One entry for shared object struct ptr. */
3833 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3834 /* One entry for _dl_runtime_resolve. */
3835 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3838 elf_section_data (htab->elf.sgotplt->output_section)
3839 ->this_hdr.sh_entsize = 4;
3841 /* Finish dynamic symbol for local IFUNC symbols. */
3842 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3844 struct plt_entry *local_plt;
3845 Elf_Internal_Sym *isym;
3846 Elf_Internal_Shdr *symtab_hdr;
3848 symtab_hdr = &elf_symtab_hdr (ibfd);
3850 if (!is_s390_elf (ibfd))
3853 local_plt = elf_s390_local_plt (ibfd);
3854 if (local_plt != NULL)
3855 for (i = 0; i < symtab_hdr->sh_info; i++)
3857 if (local_plt[i].plt.offset != (bfd_vma) -1)
3859 asection *sec = local_plt[i].sec;
3860 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3864 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3865 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3866 local_plt[i].plt.offset,
3868 + sec->output_section->vma
3869 + sec->output_offset);
3877 /* Support for core dump NOTE sections. */
3880 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3885 switch (note->descsz)
3890 case 224: /* S/390 Linux. */
3892 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3895 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3903 /* Make a ".reg/999" section. */
3904 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3905 size, note->descpos + offset);
3909 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3911 switch (note->descsz)
3916 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
3917 elf_tdata (abfd)->core->pid
3918 = bfd_get_32 (abfd, note->descdata + 12);
3919 elf_tdata (abfd)->core->program
3920 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3921 elf_tdata (abfd)->core->command
3922 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3926 /* Note that for some reason, a spurious space is tacked
3927 onto the end of the args in some (at least one anyway)
3928 implementations, so strip it off if it exists. */
3931 char *command = elf_tdata (abfd)->core->command;
3932 int n = strlen (command);
3934 if (0 < n && command[n - 1] == ' ')
3935 command[n - 1] = '\0';
3942 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3954 char data[124] = { 0 };
3955 const char *fname, *psargs;
3957 va_start (ap, note_type);
3958 fname = va_arg (ap, const char *);
3959 psargs = va_arg (ap, const char *);
3962 strncpy (data + 28, fname, 16);
3963 strncpy (data + 44, psargs, 80);
3964 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3965 &data, sizeof (data));
3970 char data[224] = { 0 };
3975 va_start (ap, note_type);
3976 pid = va_arg (ap, long);
3977 cursig = va_arg (ap, int);
3978 gregs = va_arg (ap, const void *);
3981 bfd_put_16 (abfd, cursig, data + 12);
3982 bfd_put_32 (abfd, pid, data + 24);
3983 memcpy (data + 72, gregs, 144);
3984 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3985 &data, sizeof (data));
3991 /* Return address for Ith PLT stub in section PLT, for relocation REL
3992 or (bfd_vma) -1 if it should not be included. */
3995 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3996 const arelent *rel ATTRIBUTE_UNUSED)
3998 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4001 /* Merge backend specific data from an object file to the output
4002 object file when linking. */
4005 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4007 bfd *obfd = info->output_bfd;
4009 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4012 if (!elf_s390_merge_obj_attributes (ibfd, info))
4015 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4020 #define TARGET_BIG_SYM s390_elf32_vec
4021 #define TARGET_BIG_NAME "elf32-s390"
4022 #define ELF_ARCH bfd_arch_s390
4023 #define ELF_TARGET_ID S390_ELF_DATA
4024 #define ELF_MACHINE_CODE EM_S390
4025 #define ELF_MACHINE_ALT1 EM_S390_OLD
4026 #define ELF_MAXPAGESIZE 0x1000
4028 #define elf_backend_can_gc_sections 1
4029 #define elf_backend_can_refcount 1
4030 #define elf_backend_want_got_plt 1
4031 #define elf_backend_plt_readonly 1
4032 #define elf_backend_want_plt_sym 0
4033 #define elf_backend_got_header_size 12
4034 #define elf_backend_want_dynrelro 1
4035 #define elf_backend_rela_normal 1
4037 #define elf_info_to_howto elf_s390_info_to_howto
4039 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4040 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4041 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4042 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4044 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4046 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4047 #define elf_backend_check_relocs elf_s390_check_relocs
4048 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4049 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4050 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4051 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4052 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4053 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4054 #define elf_backend_relocate_section elf_s390_relocate_section
4055 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4056 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4057 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4058 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4059 #define elf_backend_write_core_note elf_s390_write_core_note
4060 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4061 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4062 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4064 #define bfd_elf32_mkobject elf_s390_mkobject
4065 #define elf_backend_object_p elf_s390_object_p
4067 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4069 #include "elf32-target.h"