1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
37 /* The relocation "howto" table. */
39 static reloc_howto_type elf_howto_table[] =
41 HOWTO (R_390_NONE, /* type */
43 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
45 FALSE, /* pc_relative */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
53 FALSE), /* pcrel_offset */
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
174 /* GNU extension to record C++ vtable hierarchy. */
175 static reloc_howto_type elf32_s390_vtinherit_howto =
176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
177 static reloc_howto_type elf32_s390_vtentry_howto =
178 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
180 static reloc_howto_type *
181 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182 bfd_reloc_code_real_type code)
187 return &elf_howto_table[(int) R_390_NONE];
189 return &elf_howto_table[(int) R_390_8];
190 case BFD_RELOC_390_12:
191 return &elf_howto_table[(int) R_390_12];
193 return &elf_howto_table[(int) R_390_16];
195 return &elf_howto_table[(int) R_390_32];
197 return &elf_howto_table[(int) R_390_32];
198 case BFD_RELOC_32_PCREL:
199 return &elf_howto_table[(int) R_390_PC32];
200 case BFD_RELOC_390_GOT12:
201 return &elf_howto_table[(int) R_390_GOT12];
202 case BFD_RELOC_32_GOT_PCREL:
203 return &elf_howto_table[(int) R_390_GOT32];
204 case BFD_RELOC_390_PLT32:
205 return &elf_howto_table[(int) R_390_PLT32];
206 case BFD_RELOC_390_COPY:
207 return &elf_howto_table[(int) R_390_COPY];
208 case BFD_RELOC_390_GLOB_DAT:
209 return &elf_howto_table[(int) R_390_GLOB_DAT];
210 case BFD_RELOC_390_JMP_SLOT:
211 return &elf_howto_table[(int) R_390_JMP_SLOT];
212 case BFD_RELOC_390_RELATIVE:
213 return &elf_howto_table[(int) R_390_RELATIVE];
214 case BFD_RELOC_32_GOTOFF:
215 return &elf_howto_table[(int) R_390_GOTOFF32];
216 case BFD_RELOC_390_GOTPC:
217 return &elf_howto_table[(int) R_390_GOTPC];
218 case BFD_RELOC_390_GOT16:
219 return &elf_howto_table[(int) R_390_GOT16];
220 case BFD_RELOC_16_PCREL:
221 return &elf_howto_table[(int) R_390_PC16];
222 case BFD_RELOC_390_PC12DBL:
223 return &elf_howto_table[(int) R_390_PC12DBL];
224 case BFD_RELOC_390_PLT12DBL:
225 return &elf_howto_table[(int) R_390_PLT12DBL];
226 case BFD_RELOC_390_PC16DBL:
227 return &elf_howto_table[(int) R_390_PC16DBL];
228 case BFD_RELOC_390_PLT16DBL:
229 return &elf_howto_table[(int) R_390_PLT16DBL];
230 case BFD_RELOC_390_PC24DBL:
231 return &elf_howto_table[(int) R_390_PC24DBL];
232 case BFD_RELOC_390_PLT24DBL:
233 return &elf_howto_table[(int) R_390_PLT24DBL];
234 case BFD_RELOC_390_PC32DBL:
235 return &elf_howto_table[(int) R_390_PC32DBL];
236 case BFD_RELOC_390_PLT32DBL:
237 return &elf_howto_table[(int) R_390_PLT32DBL];
238 case BFD_RELOC_390_GOTPCDBL:
239 return &elf_howto_table[(int) R_390_GOTPCDBL];
240 case BFD_RELOC_390_GOTENT:
241 return &elf_howto_table[(int) R_390_GOTENT];
242 case BFD_RELOC_16_GOTOFF:
243 return &elf_howto_table[(int) R_390_GOTOFF16];
244 case BFD_RELOC_390_GOTPLT12:
245 return &elf_howto_table[(int) R_390_GOTPLT12];
246 case BFD_RELOC_390_GOTPLT16:
247 return &elf_howto_table[(int) R_390_GOTPLT16];
248 case BFD_RELOC_390_GOTPLT32:
249 return &elf_howto_table[(int) R_390_GOTPLT32];
250 case BFD_RELOC_390_GOTPLTENT:
251 return &elf_howto_table[(int) R_390_GOTPLTENT];
252 case BFD_RELOC_390_PLTOFF16:
253 return &elf_howto_table[(int) R_390_PLTOFF16];
254 case BFD_RELOC_390_PLTOFF32:
255 return &elf_howto_table[(int) R_390_PLTOFF32];
256 case BFD_RELOC_390_TLS_LOAD:
257 return &elf_howto_table[(int) R_390_TLS_LOAD];
258 case BFD_RELOC_390_TLS_GDCALL:
259 return &elf_howto_table[(int) R_390_TLS_GDCALL];
260 case BFD_RELOC_390_TLS_LDCALL:
261 return &elf_howto_table[(int) R_390_TLS_LDCALL];
262 case BFD_RELOC_390_TLS_GD32:
263 return &elf_howto_table[(int) R_390_TLS_GD32];
264 case BFD_RELOC_390_TLS_GOTIE12:
265 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266 case BFD_RELOC_390_TLS_GOTIE32:
267 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268 case BFD_RELOC_390_TLS_LDM32:
269 return &elf_howto_table[(int) R_390_TLS_LDM32];
270 case BFD_RELOC_390_TLS_IE32:
271 return &elf_howto_table[(int) R_390_TLS_IE32];
272 case BFD_RELOC_390_TLS_IEENT:
273 return &elf_howto_table[(int) R_390_TLS_IEENT];
274 case BFD_RELOC_390_TLS_LE32:
275 return &elf_howto_table[(int) R_390_TLS_LE32];
276 case BFD_RELOC_390_TLS_LDO32:
277 return &elf_howto_table[(int) R_390_TLS_LDO32];
278 case BFD_RELOC_390_TLS_DTPMOD:
279 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280 case BFD_RELOC_390_TLS_DTPOFF:
281 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282 case BFD_RELOC_390_TLS_TPOFF:
283 return &elf_howto_table[(int) R_390_TLS_TPOFF];
284 case BFD_RELOC_390_20:
285 return &elf_howto_table[(int) R_390_20];
286 case BFD_RELOC_390_GOT20:
287 return &elf_howto_table[(int) R_390_GOT20];
288 case BFD_RELOC_390_GOTPLT20:
289 return &elf_howto_table[(int) R_390_GOTPLT20];
290 case BFD_RELOC_390_TLS_GOTIE20:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292 case BFD_RELOC_390_IRELATIVE:
293 return &elf_howto_table[(int) R_390_IRELATIVE];
294 case BFD_RELOC_VTABLE_INHERIT:
295 return &elf32_s390_vtinherit_howto;
296 case BFD_RELOC_VTABLE_ENTRY:
297 return &elf32_s390_vtentry_howto;
304 static reloc_howto_type *
305 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311 if (elf_howto_table[i].name != NULL
312 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313 return &elf_howto_table[i];
315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316 return &elf32_s390_vtinherit_howto;
317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318 return &elf32_s390_vtentry_howto;
323 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
324 and elf32-s390.c has its own copy. */
327 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
329 Elf_Internal_Rela *dst)
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
334 case R_390_GNU_VTINHERIT:
335 cache_ptr->howto = &elf32_s390_vtinherit_howto;
338 case R_390_GNU_VTENTRY:
339 cache_ptr->howto = &elf32_s390_vtentry_howto;
343 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
345 /* 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. */
747 bfd_signed_vma refcount;
751 /* Small local sym cache. */
752 struct sym_cache sym_cache;
755 /* Get the s390 ELF linker hash table from a link_info structure. */
757 #define elf_s390_hash_table(p) \
758 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
759 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
762 #include "elf-s390-common.c"
764 /* Create an entry in an s390 ELF linker hash table. */
766 static struct bfd_hash_entry *
767 link_hash_newfunc (struct bfd_hash_entry *entry,
768 struct bfd_hash_table *table,
771 /* Allocate the structure if it has not already been allocated by a
775 entry = bfd_hash_allocate (table,
776 sizeof (struct elf_s390_link_hash_entry));
781 /* Call the allocation method of the superclass. */
782 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
785 struct elf_s390_link_hash_entry *eh;
787 eh = (struct elf_s390_link_hash_entry *) entry;
788 eh->dyn_relocs = NULL;
789 eh->gotplt_refcount = 0;
790 eh->tls_type = GOT_UNKNOWN;
791 eh->ifunc_resolver_address = 0;
792 eh->ifunc_resolver_section = NULL;
798 /* Create an s390 ELF linker hash table. */
800 static struct bfd_link_hash_table *
801 elf_s390_link_hash_table_create (bfd *abfd)
803 struct elf_s390_link_hash_table *ret;
804 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
806 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
810 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
811 sizeof (struct elf_s390_link_hash_entry),
818 return &ret->elf.root;
821 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
822 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
826 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
828 struct elf_s390_link_hash_table *htab;
830 htab = elf_s390_hash_table (info);
831 if (!htab->elf.sgot && !_bfd_elf_create_got_section (dynobj, info))
834 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
837 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
838 if (!bfd_link_pic (info))
839 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
841 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
842 || (!bfd_link_pic (info) && !htab->srelbss))
848 /* Copy the extra info we tack onto an elf_link_hash_entry. */
851 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
852 struct elf_link_hash_entry *dir,
853 struct elf_link_hash_entry *ind)
855 struct elf_s390_link_hash_entry *edir, *eind;
857 edir = (struct elf_s390_link_hash_entry *) dir;
858 eind = (struct elf_s390_link_hash_entry *) ind;
860 if (eind->dyn_relocs != NULL)
862 if (edir->dyn_relocs != NULL)
864 struct elf_dyn_relocs **pp;
865 struct elf_dyn_relocs *p;
867 /* Add reloc counts against the indirect sym to the direct sym
868 list. Merge any entries against the same section. */
869 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
871 struct elf_dyn_relocs *q;
873 for (q = edir->dyn_relocs; q != NULL; q = q->next)
874 if (q->sec == p->sec)
876 q->pc_count += p->pc_count;
877 q->count += p->count;
884 *pp = edir->dyn_relocs;
887 edir->dyn_relocs = eind->dyn_relocs;
888 eind->dyn_relocs = NULL;
891 if (ind->root.type == bfd_link_hash_indirect
892 && dir->got.refcount <= 0)
894 edir->tls_type = eind->tls_type;
895 eind->tls_type = GOT_UNKNOWN;
898 if (ELIMINATE_COPY_RELOCS
899 && ind->root.type != bfd_link_hash_indirect
900 && dir->dynamic_adjusted)
902 /* If called to transfer flags for a weakdef during processing
903 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
904 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
905 dir->ref_dynamic |= ind->ref_dynamic;
906 dir->ref_regular |= ind->ref_regular;
907 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
908 dir->needs_plt |= ind->needs_plt;
911 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
915 elf_s390_tls_transition (struct bfd_link_info *info,
919 if (bfd_link_pic (info))
927 return R_390_TLS_LE32;
928 return R_390_TLS_IE32;
929 case R_390_TLS_GOTIE32:
931 return R_390_TLS_LE32;
932 return R_390_TLS_GOTIE32;
933 case R_390_TLS_LDM32:
934 return R_390_TLS_LE32;
940 /* Look through the relocs for a section during the first phase, and
941 allocate space in the global offset table or procedure linkage
945 elf_s390_check_relocs (bfd *abfd,
946 struct bfd_link_info *info,
948 const Elf_Internal_Rela *relocs)
950 struct elf_s390_link_hash_table *htab;
951 Elf_Internal_Shdr *symtab_hdr;
952 struct elf_link_hash_entry **sym_hashes;
953 const Elf_Internal_Rela *rel;
954 const Elf_Internal_Rela *rel_end;
956 bfd_signed_vma *local_got_refcounts;
957 int tls_type, old_tls_type;
958 Elf_Internal_Sym *isym;
960 if (bfd_link_relocatable (info))
963 BFD_ASSERT (is_s390_elf (abfd));
965 htab = elf_s390_hash_table (info);
966 symtab_hdr = &elf_symtab_hdr (abfd);
967 sym_hashes = elf_sym_hashes (abfd);
968 local_got_refcounts = elf_local_got_refcounts (abfd);
972 rel_end = relocs + sec->reloc_count;
973 for (rel = relocs; rel < rel_end; rel++)
976 unsigned long r_symndx;
977 struct elf_link_hash_entry *h;
979 r_symndx = ELF32_R_SYM (rel->r_info);
981 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
983 /* xgettext:c-format */
984 _bfd_error_handler (_("%B: bad symbol index: %d"),
989 if (r_symndx < symtab_hdr->sh_info)
991 /* A local symbol. */
992 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
997 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
999 struct plt_entry *plt;
1001 if (htab->elf.dynobj == NULL)
1002 htab->elf.dynobj = abfd;
1004 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1007 if (local_got_refcounts == NULL)
1009 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1011 local_got_refcounts = elf_local_got_refcounts (abfd);
1013 plt = elf_s390_local_plt (abfd);
1014 plt[r_symndx].plt.refcount++;
1020 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1021 while (h->root.type == bfd_link_hash_indirect
1022 || h->root.type == bfd_link_hash_warning)
1023 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1025 /* PR15323, ref flags aren't set for references in the same
1027 h->root.non_ir_ref = 1;
1030 /* Create got section and local_got_refcounts array if they
1032 r_type = elf_s390_tls_transition (info,
1033 ELF32_R_TYPE (rel->r_info),
1042 case R_390_GOTPLT12:
1043 case R_390_GOTPLT16:
1044 case R_390_GOTPLT20:
1045 case R_390_GOTPLT32:
1046 case R_390_GOTPLTENT:
1047 case R_390_TLS_GD32:
1048 case R_390_TLS_GOTIE12:
1049 case R_390_TLS_GOTIE20:
1050 case R_390_TLS_GOTIE32:
1051 case R_390_TLS_IEENT:
1052 case R_390_TLS_IE32:
1053 case R_390_TLS_LDM32:
1055 && local_got_refcounts == NULL)
1057 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1059 local_got_refcounts = elf_local_got_refcounts (abfd);
1062 case R_390_GOTOFF16:
1063 case R_390_GOTOFF32:
1065 case R_390_GOTPCDBL:
1066 if (htab->elf.sgot == NULL)
1068 if (htab->elf.dynobj == NULL)
1069 htab->elf.dynobj = abfd;
1070 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1077 if (htab->elf.dynobj == NULL)
1078 htab->elf.dynobj = abfd;
1079 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1082 /* Make sure an IFUNC symbol defined in a non-shared object
1083 always gets a PLT slot. */
1084 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1086 /* The symbol is called by the dynamic loader in order
1087 to resolve the relocation. So it is in fact also
1096 case R_390_GOTPCDBL:
1097 /* These relocs do not need a GOT slot. They just load the
1098 GOT pointer itself or address something else relative to
1099 the GOT. Since the GOT pointer has been set up above we
1102 case R_390_GOTOFF16:
1103 case R_390_GOTOFF32:
1104 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1108 case R_390_PLT12DBL:
1109 case R_390_PLT16DBL:
1110 case R_390_PLT24DBL:
1111 case R_390_PLT32DBL:
1113 case R_390_PLTOFF16:
1114 case R_390_PLTOFF32:
1115 /* This symbol requires a procedure linkage table entry. We
1116 actually build the entry in adjust_dynamic_symbol,
1117 because this might be a case of linking PIC code which is
1118 never referenced by a dynamic object, in which case we
1119 don't need to generate a procedure linkage table entry
1122 /* If this is a local symbol, we resolve it directly without
1123 creating a procedure linkage table entry. */
1127 h->plt.refcount += 1;
1131 case R_390_GOTPLT12:
1132 case R_390_GOTPLT16:
1133 case R_390_GOTPLT20:
1134 case R_390_GOTPLT32:
1135 case R_390_GOTPLTENT:
1136 /* This symbol requires either a procedure linkage table entry
1137 or an entry in the local got. We actually build the entry
1138 in adjust_dynamic_symbol because whether this is really a
1139 global reference can change and with it the fact if we have
1140 to create a plt entry or a local got entry. To be able to
1141 make a once global symbol a local one we have to keep track
1142 of the number of gotplt references that exist for this
1146 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1148 h->plt.refcount += 1;
1151 local_got_refcounts[r_symndx] += 1;
1154 case R_390_TLS_LDM32:
1155 htab->tls_ldm_got.refcount += 1;
1158 case R_390_TLS_IE32:
1159 case R_390_TLS_GOTIE12:
1160 case R_390_TLS_GOTIE20:
1161 case R_390_TLS_GOTIE32:
1162 case R_390_TLS_IEENT:
1163 if (bfd_link_pic (info))
1164 info->flags |= DF_STATIC_TLS;
1172 case R_390_TLS_GD32:
1173 /* This symbol requires a global offset table entry. */
1182 tls_type = GOT_NORMAL;
1184 case R_390_TLS_GD32:
1185 tls_type = GOT_TLS_GD;
1187 case R_390_TLS_IE32:
1188 case R_390_TLS_GOTIE32:
1189 tls_type = GOT_TLS_IE;
1191 case R_390_TLS_GOTIE12:
1192 case R_390_TLS_GOTIE20:
1193 case R_390_TLS_IEENT:
1194 tls_type = GOT_TLS_IE_NLT;
1200 h->got.refcount += 1;
1201 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1205 local_got_refcounts[r_symndx] += 1;
1206 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1208 /* If a TLS symbol is accessed using IE at least once,
1209 there is no point to use dynamic model for it. */
1210 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1212 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1215 /* xgettext:c-format */
1216 (_("%B: `%s' accessed both as normal and thread local symbol"),
1217 abfd, h->root.root.string);
1220 if (old_tls_type > tls_type)
1221 tls_type = old_tls_type;
1224 if (old_tls_type != tls_type)
1227 elf_s390_hash_entry (h)->tls_type = tls_type;
1229 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1232 if (r_type != R_390_TLS_IE32)
1236 case R_390_TLS_LE32:
1237 /* For static linking and executables this reloc will be
1238 calculated at linktime otherwise a TLS_TPOFF runtime
1239 reloc will be generated. */
1240 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1243 if (!bfd_link_pic (info))
1245 info->flags |= DF_STATIC_TLS;
1257 if (h != NULL && bfd_link_executable (info))
1259 /* If this reloc is in a read-only section, we might
1260 need a copy reloc. We can't check reliably at this
1261 stage whether the section is read-only, as input
1262 sections have not yet been mapped to output sections.
1263 Tentatively set the flag for now, and correct in
1264 adjust_dynamic_symbol. */
1267 if (!bfd_link_pic (info))
1269 /* We may need a .plt entry if the function this reloc
1270 refers to is in a shared lib. */
1271 h->plt.refcount += 1;
1275 /* If we are creating a shared library, and this is a reloc
1276 against a global symbol, or a non PC relative reloc
1277 against a local symbol, then we need to copy the reloc
1278 into the shared library. However, if we are linking with
1279 -Bsymbolic, we do not need to copy a reloc against a
1280 global symbol which is defined in an object we are
1281 including in the link (i.e., DEF_REGULAR is set). At
1282 this point we have not seen all the input files, so it is
1283 possible that DEF_REGULAR is not set now but will be set
1284 later (it is never cleared). In case of a weak definition,
1285 DEF_REGULAR may be cleared later by a strong definition in
1286 a shared library. We account for that possibility below by
1287 storing information in the relocs_copied field of the hash
1288 table entry. A similar situation occurs when creating
1289 shared libraries and symbol visibility changes render the
1292 If on the other hand, we are creating an executable, we
1293 may need to keep relocations for symbols satisfied by a
1294 dynamic library if we manage to avoid copy relocs for the
1296 if ((bfd_link_pic (info)
1297 && (sec->flags & SEC_ALLOC) != 0
1298 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1299 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1300 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1301 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1302 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1303 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1305 && (! SYMBOLIC_BIND (info, h)
1306 || h->root.type == bfd_link_hash_defweak
1307 || !h->def_regular))))
1308 || (ELIMINATE_COPY_RELOCS
1309 && !bfd_link_pic (info)
1310 && (sec->flags & SEC_ALLOC) != 0
1312 && (h->root.type == bfd_link_hash_defweak
1313 || !h->def_regular)))
1315 struct elf_dyn_relocs *p;
1316 struct elf_dyn_relocs **head;
1318 /* We must copy these reloc types into the output file.
1319 Create a reloc section in dynobj and make room for
1323 if (htab->elf.dynobj == NULL)
1324 htab->elf.dynobj = abfd;
1326 sreloc = _bfd_elf_make_dynamic_reloc_section
1327 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1333 /* If this is a global symbol, we count the number of
1334 relocations we need for this symbol. */
1337 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1341 /* Track dynamic relocs needed for local syms too.
1342 We really need local syms available to do this
1347 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1352 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1356 vpp = &elf_section_data (s)->local_dynrel;
1357 head = (struct elf_dyn_relocs **) vpp;
1361 if (p == NULL || p->sec != sec)
1363 bfd_size_type amt = sizeof *p;
1365 p = ((struct elf_dyn_relocs *)
1366 bfd_alloc (htab->elf.dynobj, amt));
1377 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1378 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1379 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1380 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1381 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1382 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1387 /* This relocation describes the C++ object vtable hierarchy.
1388 Reconstruct it for later use during GC. */
1389 case R_390_GNU_VTINHERIT:
1390 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1394 /* This relocation describes which C++ vtable entries are actually
1395 used. Record for later use during GC. */
1396 case R_390_GNU_VTENTRY:
1397 BFD_ASSERT (h != NULL);
1399 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1411 /* Return the section that should be marked against GC for a given
1415 elf_s390_gc_mark_hook (asection *sec,
1416 struct bfd_link_info *info,
1417 Elf_Internal_Rela *rel,
1418 struct elf_link_hash_entry *h,
1419 Elf_Internal_Sym *sym)
1422 switch (ELF32_R_TYPE (rel->r_info))
1424 case R_390_GNU_VTINHERIT:
1425 case R_390_GNU_VTENTRY:
1428 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1432 /* Update the got entry reference counts for the section being removed. */
1435 elf_s390_gc_sweep_hook (bfd *abfd,
1436 struct bfd_link_info *info,
1438 const Elf_Internal_Rela *relocs)
1440 struct elf_s390_link_hash_table *htab;
1441 Elf_Internal_Shdr *symtab_hdr;
1442 struct elf_link_hash_entry **sym_hashes;
1443 bfd_signed_vma *local_got_refcounts;
1444 const Elf_Internal_Rela *rel, *relend;
1446 if (bfd_link_relocatable (info))
1449 htab = elf_s390_hash_table (info);
1453 elf_section_data (sec)->local_dynrel = NULL;
1455 symtab_hdr = &elf_symtab_hdr (abfd);
1456 sym_hashes = elf_sym_hashes (abfd);
1457 local_got_refcounts = elf_local_got_refcounts (abfd);
1459 relend = relocs + sec->reloc_count;
1460 for (rel = relocs; rel < relend; rel++)
1462 unsigned long r_symndx;
1463 unsigned int r_type;
1464 struct elf_link_hash_entry *h = NULL;
1466 r_symndx = ELF32_R_SYM (rel->r_info);
1467 if (r_symndx >= symtab_hdr->sh_info)
1469 struct elf_s390_link_hash_entry *eh;
1470 struct elf_dyn_relocs **pp;
1471 struct elf_dyn_relocs *p;
1473 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1474 while (h->root.type == bfd_link_hash_indirect
1475 || h->root.type == bfd_link_hash_warning)
1476 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1477 eh = (struct elf_s390_link_hash_entry *) h;
1479 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1482 /* Everything must go for SEC. */
1489 Elf_Internal_Sym *isym;
1491 /* A local symbol. */
1492 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1497 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1499 struct plt_entry *plt = elf_s390_local_plt (abfd);
1500 if (plt[r_symndx].plt.refcount > 0)
1501 plt[r_symndx].plt.refcount--;
1505 r_type = ELF32_R_TYPE (rel->r_info);
1506 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1509 case R_390_TLS_LDM32:
1510 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1511 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1514 case R_390_GOTOFF16:
1515 case R_390_GOTOFF32:
1516 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1523 case R_390_GOTPCDBL:
1526 case R_390_TLS_GD32:
1527 case R_390_TLS_IE32:
1528 case R_390_TLS_GOTIE12:
1529 case R_390_TLS_GOTIE20:
1530 case R_390_TLS_GOTIE32:
1531 case R_390_TLS_IEENT:
1539 if (h->got.refcount > 0)
1540 h->got.refcount -= 1;
1542 else if (local_got_refcounts != NULL)
1544 if (local_got_refcounts[r_symndx] > 0)
1545 local_got_refcounts[r_symndx] -= 1;
1560 if (bfd_link_pic (info))
1564 case R_390_PLT12DBL:
1565 case R_390_PLT16DBL:
1566 case R_390_PLT24DBL:
1567 case R_390_PLT32DBL:
1569 case R_390_PLTOFF16:
1570 case R_390_PLTOFF32:
1573 if (h->plt.refcount > 0)
1574 h->plt.refcount -= 1;
1578 case R_390_GOTPLT12:
1579 case R_390_GOTPLT16:
1580 case R_390_GOTPLT20:
1581 case R_390_GOTPLT32:
1582 case R_390_GOTPLTENT:
1585 if (h->plt.refcount > 0)
1587 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1588 h->plt.refcount -= 1;
1591 else if (local_got_refcounts != NULL)
1593 if (local_got_refcounts[r_symndx] > 0)
1594 local_got_refcounts[r_symndx] -= 1;
1606 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1607 entry but we found we will not create any. Called when we find we will
1608 not have any PLT for this symbol, by for example
1609 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1610 or elf_s390_size_dynamic_sections if no dynamic sections will be
1611 created (we're only linking static objects). */
1614 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1616 if (h->elf.root.type == bfd_link_hash_warning)
1617 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1619 if (h->gotplt_refcount <= 0)
1622 /* We simply add the number of gotplt references to the number
1623 * of got references for this symbol. */
1624 h->elf.got.refcount += h->gotplt_refcount;
1625 h->gotplt_refcount = -1;
1628 /* Adjust a symbol defined by a dynamic object and referenced by a
1629 regular object. The current definition is in some section of the
1630 dynamic object, but we're not including those sections. We have to
1631 change the definition to something the rest of the link can
1635 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1636 struct elf_link_hash_entry *h)
1638 struct elf_s390_link_hash_table *htab;
1641 /* STT_GNU_IFUNC symbol must go through PLT. */
1642 if (s390_is_ifunc_symbol_p (h))
1644 /* All local STT_GNU_IFUNC references must be treated as local
1645 calls via local PLT. */
1646 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1648 bfd_size_type pc_count = 0, count = 0;
1649 struct elf_dyn_relocs **pp;
1650 struct elf_s390_link_hash_entry *eh;
1651 struct elf_dyn_relocs *p;
1653 eh = (struct elf_s390_link_hash_entry *) h;
1654 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1656 pc_count += p->pc_count;
1657 p->count -= p->pc_count;
1666 if (pc_count || count)
1670 if (h->plt.refcount <= 0)
1671 h->plt.refcount = 1;
1673 h->plt.refcount += 1;
1677 if (h->plt.refcount <= 0)
1679 h->plt.offset = (bfd_vma) -1;
1685 /* If this is a function, put it in the procedure linkage table. We
1686 will fill in the contents of the procedure linkage table later
1687 (although we could actually do it here). */
1688 if (h->type == STT_FUNC
1691 if (h->plt.refcount <= 0
1692 || SYMBOL_CALLS_LOCAL (info, h)
1693 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1694 && h->root.type != bfd_link_hash_undefweak))
1696 /* This case can occur if we saw a PLT32 reloc in an input
1697 file, but the symbol was never referred to by a dynamic
1698 object, or if all references were garbage collected. In
1699 such a case, we don't actually need to build a procedure
1700 linkage table, and we can just do a PC32 reloc instead. */
1701 h->plt.offset = (bfd_vma) -1;
1703 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1709 /* It's possible that we incorrectly decided a .plt reloc was
1710 needed for an R_390_PC32 reloc to a non-function sym in
1711 check_relocs. We can't decide accurately between function and
1712 non-function syms in check-relocs; Objects loaded later in
1713 the link may change h->type. So fix it now. */
1714 h->plt.offset = (bfd_vma) -1;
1716 /* If this is a weak symbol, and there is a real definition, the
1717 processor independent code will have arranged for us to see the
1718 real definition first, and we can just use the same value. */
1719 if (h->u.weakdef != NULL)
1721 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1722 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1723 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1724 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1725 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1726 h->non_got_ref = h->u.weakdef->non_got_ref;
1730 /* This is a reference to a symbol defined by a dynamic object which
1731 is not a function. */
1733 /* If we are creating a shared library, we must presume that the
1734 only references to the symbol are via the global offset table.
1735 For such cases we need not do anything here; the relocations will
1736 be handled correctly by relocate_section. */
1737 if (bfd_link_pic (info))
1740 /* If there are no references to this symbol that do not use the
1741 GOT, we don't need to generate a copy reloc. */
1742 if (!h->non_got_ref)
1745 /* If -z nocopyreloc was given, we won't generate them either. */
1746 if (info->nocopyreloc)
1752 if (ELIMINATE_COPY_RELOCS)
1754 struct elf_s390_link_hash_entry * eh;
1755 struct elf_dyn_relocs *p;
1757 eh = (struct elf_s390_link_hash_entry *) h;
1758 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1760 s = p->sec->output_section;
1761 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1765 /* If we didn't find any dynamic relocs in read-only sections, then
1766 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1774 /* We must allocate the symbol in our .dynbss section, which will
1775 become part of the .bss section of the executable. There will be
1776 an entry for this symbol in the .dynsym section. The dynamic
1777 object will contain position independent code, so all references
1778 from the dynamic object to this symbol will go through the global
1779 offset table. The dynamic linker will use the .dynsym entry to
1780 determine the address it must put in the global offset table, so
1781 both the dynamic object and the regular object will refer to the
1782 same memory location for the variable. */
1784 htab = elf_s390_hash_table (info);
1786 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1787 copy the initial value out of the dynamic object and into the
1788 runtime process image. */
1789 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1791 htab->srelbss->size += sizeof (Elf32_External_Rela);
1797 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1800 /* Allocate space in .plt, .got and associated reloc sections for
1804 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1806 struct bfd_link_info *info;
1807 struct elf_s390_link_hash_table *htab;
1808 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1809 struct elf_dyn_relocs *p;
1811 if (h->root.type == bfd_link_hash_indirect)
1814 info = (struct bfd_link_info *) inf;
1815 htab = elf_s390_hash_table (info);
1817 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1818 here if it is defined and referenced in a non-shared object. */
1819 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1820 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1821 else if (htab->elf.dynamic_sections_created
1822 && h->plt.refcount > 0)
1824 /* Make sure this symbol is output as a dynamic symbol.
1825 Undefined weak syms won't yet be marked as dynamic. */
1826 if (h->dynindx == -1
1827 && !h->forced_local)
1829 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1833 if (bfd_link_pic (info)
1834 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1836 asection *s = htab->elf.splt;
1838 /* If this is the first .plt entry, make room for the special
1841 s->size += PLT_FIRST_ENTRY_SIZE;
1843 h->plt.offset = s->size;
1845 /* If this symbol is not defined in a regular file, and we are
1846 not generating a shared library, then set the symbol to this
1847 location in the .plt. This is required to make function
1848 pointers compare as equal between the normal executable and
1849 the shared library. */
1850 if (! bfd_link_pic (info)
1853 h->root.u.def.section = s;
1854 h->root.u.def.value = h->plt.offset;
1857 /* Make room for this entry. */
1858 s->size += PLT_ENTRY_SIZE;
1860 /* We also need to make an entry in the .got.plt section, which
1861 will be placed in the .got section by the linker script. */
1862 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1864 /* We also need to make an entry in the .rela.plt section. */
1865 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1869 h->plt.offset = (bfd_vma) -1;
1871 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1876 h->plt.offset = (bfd_vma) -1;
1878 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1881 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1882 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1883 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1884 we can save the dynamic TLS relocation. */
1885 if (h->got.refcount > 0
1886 && !bfd_link_pic (info)
1888 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1890 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1891 /* For the GOTIE access without a literal pool entry the offset has
1892 to be stored somewhere. The immediate value in the instruction
1893 is not bit enough so the value is stored in the got. */
1895 h->got.offset = htab->elf.sgot->size;
1896 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1899 h->got.offset = (bfd_vma) -1;
1901 else if (h->got.refcount > 0)
1905 int tls_type = elf_s390_hash_entry(h)->tls_type;
1907 /* Make sure this symbol is output as a dynamic symbol.
1908 Undefined weak syms won't yet be marked as dynamic. */
1909 if (h->dynindx == -1
1910 && !h->forced_local)
1912 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1917 h->got.offset = s->size;
1918 s->size += GOT_ENTRY_SIZE;
1919 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1920 if (tls_type == GOT_TLS_GD)
1921 s->size += GOT_ENTRY_SIZE;
1922 dyn = htab->elf.dynamic_sections_created;
1923 /* R_390_TLS_IE32 needs one dynamic relocation,
1924 R_390_TLS_GD32 needs one if local symbol and two if global. */
1925 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1926 || tls_type >= GOT_TLS_IE)
1927 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1928 else if (tls_type == GOT_TLS_GD)
1929 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1930 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1931 || h->root.type != bfd_link_hash_undefweak)
1932 && (bfd_link_pic (info)
1933 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1934 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1937 h->got.offset = (bfd_vma) -1;
1939 if (eh->dyn_relocs == NULL)
1942 /* In the shared -Bsymbolic case, discard space allocated for
1943 dynamic pc-relative relocs against symbols which turn out to be
1944 defined in regular objects. For the normal shared case, discard
1945 space for pc-relative relocs that have become local due to symbol
1946 visibility changes. */
1948 if (bfd_link_pic (info))
1950 if (SYMBOL_CALLS_LOCAL (info, h))
1952 struct elf_dyn_relocs **pp;
1954 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1956 p->count -= p->pc_count;
1965 /* Also discard relocs on undefined weak syms with non-default
1967 if (eh->dyn_relocs != NULL
1968 && h->root.type == bfd_link_hash_undefweak)
1970 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1971 eh->dyn_relocs = NULL;
1973 /* Make sure undefined weak symbols are output as a dynamic
1975 else if (h->dynindx == -1
1976 && !h->forced_local)
1978 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1983 else if (ELIMINATE_COPY_RELOCS)
1985 /* For the non-shared case, discard space for relocs against
1986 symbols which turn out to need copy relocs or are not
1992 || (htab->elf.dynamic_sections_created
1993 && (h->root.type == bfd_link_hash_undefweak
1994 || h->root.type == bfd_link_hash_undefined))))
1996 /* Make sure this symbol is output as a dynamic symbol.
1997 Undefined weak syms won't yet be marked as dynamic. */
1998 if (h->dynindx == -1
1999 && !h->forced_local)
2001 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2005 /* If that succeeded, we know we'll be keeping all the
2007 if (h->dynindx != -1)
2011 eh->dyn_relocs = NULL;
2016 /* Finally, allocate space. */
2017 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2019 asection *sreloc = elf_section_data (p->sec)->sreloc;
2021 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2027 /* Find any dynamic relocs that apply to read-only sections. */
2030 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2032 struct elf_s390_link_hash_entry *eh;
2033 struct elf_dyn_relocs *p;
2035 eh = (struct elf_s390_link_hash_entry *) h;
2036 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2038 asection *s = p->sec->output_section;
2040 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2042 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2044 info->flags |= DF_TEXTREL;
2046 /* Not an error, just cut short the traversal. */
2053 /* Set the sizes of the dynamic sections. */
2056 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2057 struct bfd_link_info *info)
2059 struct elf_s390_link_hash_table *htab;
2065 htab = elf_s390_hash_table (info);
2066 dynobj = htab->elf.dynobj;
2070 if (htab->elf.dynamic_sections_created)
2072 /* Set the contents of the .interp section to the interpreter. */
2073 if (bfd_link_executable (info) && !info->nointerp)
2075 s = bfd_get_linker_section (dynobj, ".interp");
2078 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2079 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2083 /* Set up .got offsets for local syms, and space for local dynamic
2085 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2087 bfd_signed_vma *local_got;
2088 bfd_signed_vma *end_local_got;
2089 char *local_tls_type;
2090 bfd_size_type locsymcount;
2091 Elf_Internal_Shdr *symtab_hdr;
2093 struct plt_entry *local_plt;
2096 if (! is_s390_elf (ibfd))
2099 for (s = ibfd->sections; s != NULL; s = s->next)
2101 struct elf_dyn_relocs *p;
2103 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2105 if (!bfd_is_abs_section (p->sec)
2106 && bfd_is_abs_section (p->sec->output_section))
2108 /* Input section has been discarded, either because
2109 it is a copy of a linkonce section or due to
2110 linker script /DISCARD/, so we'll be discarding
2113 else if (p->count != 0)
2115 srela = elf_section_data (p->sec)->sreloc;
2116 srela->size += p->count * sizeof (Elf32_External_Rela);
2117 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2118 info->flags |= DF_TEXTREL;
2123 local_got = elf_local_got_refcounts (ibfd);
2127 symtab_hdr = &elf_symtab_hdr (ibfd);
2128 locsymcount = symtab_hdr->sh_info;
2129 end_local_got = local_got + locsymcount;
2130 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2132 srela = htab->elf.srelgot;
2133 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2137 *local_got = s->size;
2138 s->size += GOT_ENTRY_SIZE;
2139 if (*local_tls_type == GOT_TLS_GD)
2140 s->size += GOT_ENTRY_SIZE;
2141 if (bfd_link_pic (info))
2142 srela->size += sizeof (Elf32_External_Rela);
2145 *local_got = (bfd_vma) -1;
2147 local_plt = elf_s390_local_plt (ibfd);
2148 for (i = 0; i < symtab_hdr->sh_info; i++)
2150 if (local_plt[i].plt.refcount > 0)
2152 local_plt[i].plt.offset = htab->elf.iplt->size;
2153 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2154 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2155 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2158 local_plt[i].plt.offset = (bfd_vma) -1;
2162 if (htab->tls_ldm_got.refcount > 0)
2164 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2166 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2167 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2168 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2171 htab->tls_ldm_got.offset = -1;
2173 /* Allocate global sym .plt and .got entries, and space for global
2174 sym dynamic relocs. */
2175 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2177 /* We now have determined the sizes of the various dynamic sections.
2178 Allocate memory for them. */
2180 for (s = dynobj->sections; s != NULL; s = s->next)
2182 if ((s->flags & SEC_LINKER_CREATED) == 0)
2185 if (s == htab->elf.splt
2186 || s == htab->elf.sgot
2187 || s == htab->elf.sgotplt
2188 || s == htab->sdynbss
2189 || s == htab->elf.iplt
2190 || s == htab->elf.igotplt
2191 || s == htab->irelifunc)
2193 /* Strip this section if we don't need it; see the
2196 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2201 /* We use the reloc_count field as a counter if we need
2202 to copy relocs into the output file. */
2207 /* It's not one of our sections, so don't allocate space. */
2213 /* If we don't need this section, strip it from the
2214 output file. This is to handle .rela.bss and
2215 .rela.plt. We must create it in
2216 create_dynamic_sections, because it must be created
2217 before the linker maps input sections to output
2218 sections. The linker does that before
2219 adjust_dynamic_symbol is called, and it is that
2220 function which decides whether anything needs to go
2221 into these sections. */
2223 s->flags |= SEC_EXCLUDE;
2227 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2230 /* Allocate memory for the section contents. We use bfd_zalloc
2231 here in case unused entries are not reclaimed before the
2232 section's contents are written out. This should not happen,
2233 but this way if it does, we get a R_390_NONE reloc instead
2235 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2236 if (s->contents == NULL)
2240 if (htab->elf.dynamic_sections_created)
2242 /* Add some entries to the .dynamic section. We fill in the
2243 values later, in elf_s390_finish_dynamic_sections, but we
2244 must add the entries now so that we get the correct size for
2245 the .dynamic section. The DT_DEBUG entry is filled in by the
2246 dynamic linker and used by the debugger. */
2247 #define add_dynamic_entry(TAG, VAL) \
2248 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2250 if (bfd_link_executable (info))
2252 if (!add_dynamic_entry (DT_DEBUG, 0))
2256 if (htab->elf.splt->size != 0)
2258 if (!add_dynamic_entry (DT_PLTGOT, 0)
2259 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2260 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2261 || !add_dynamic_entry (DT_JMPREL, 0))
2267 if (!add_dynamic_entry (DT_RELA, 0)
2268 || !add_dynamic_entry (DT_RELASZ, 0)
2269 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2272 /* If any dynamic relocs apply to a read-only section,
2273 then we need a DT_TEXTREL entry. */
2274 if ((info->flags & DF_TEXTREL) == 0)
2275 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2277 if ((info->flags & DF_TEXTREL) != 0)
2279 if (!add_dynamic_entry (DT_TEXTREL, 0))
2284 #undef add_dynamic_entry
2289 /* Return the base VMA address which should be subtracted from real addresses
2290 when resolving @dtpoff relocation.
2291 This is PT_TLS segment p_vaddr. */
2294 dtpoff_base (struct bfd_link_info *info)
2296 /* If tls_sec is NULL, we should have signalled an error already. */
2297 if (elf_hash_table (info)->tls_sec == NULL)
2299 return elf_hash_table (info)->tls_sec->vma;
2302 /* Return the relocation value for @tpoff relocation
2303 if STT_TLS virtual address is ADDRESS. */
2306 tpoff (struct bfd_link_info *info, bfd_vma address)
2308 struct elf_link_hash_table *htab = elf_hash_table (info);
2310 /* If tls_sec is NULL, we should have signalled an error already. */
2311 if (htab->tls_sec == NULL)
2313 return htab->tls_size + htab->tls_sec->vma - address;
2316 /* Complain if TLS instruction relocation is against an invalid
2320 invalid_tls_insn (bfd *input_bfd,
2321 asection *input_section,
2322 Elf_Internal_Rela *rel)
2324 reloc_howto_type *howto;
2326 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2328 /* xgettext:c-format */
2329 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2332 (long) rel->r_offset,
2334 bfd_set_error (bfd_error_bad_value);
2337 /* Relocate a 390 ELF section. */
2340 elf_s390_relocate_section (bfd *output_bfd,
2341 struct bfd_link_info *info,
2343 asection *input_section,
2345 Elf_Internal_Rela *relocs,
2346 Elf_Internal_Sym *local_syms,
2347 asection **local_sections)
2349 struct elf_s390_link_hash_table *htab;
2350 Elf_Internal_Shdr *symtab_hdr;
2351 struct elf_link_hash_entry **sym_hashes;
2352 bfd_vma *local_got_offsets;
2353 Elf_Internal_Rela *rel;
2354 Elf_Internal_Rela *relend;
2356 BFD_ASSERT (is_s390_elf (input_bfd));
2358 htab = elf_s390_hash_table (info);
2359 symtab_hdr = &elf_symtab_hdr (input_bfd);
2360 sym_hashes = elf_sym_hashes (input_bfd);
2361 local_got_offsets = elf_local_got_offsets (input_bfd);
2364 relend = relocs + input_section->reloc_count;
2365 for (; rel < relend; rel++)
2367 unsigned int r_type;
2368 reloc_howto_type *howto;
2369 unsigned long r_symndx;
2370 struct elf_link_hash_entry *h;
2371 Elf_Internal_Sym *sym;
2375 bfd_boolean unresolved_reloc;
2376 bfd_reloc_status_type r;
2378 asection *base_got = htab->elf.sgot;
2380 r_type = ELF32_R_TYPE (rel->r_info);
2381 if (r_type == (int) R_390_GNU_VTINHERIT
2382 || r_type == (int) R_390_GNU_VTENTRY)
2384 if (r_type >= (int) R_390_max)
2386 bfd_set_error (bfd_error_bad_value);
2390 howto = elf_howto_table + r_type;
2391 r_symndx = ELF32_R_SYM (rel->r_info);
2396 unresolved_reloc = FALSE;
2397 if (r_symndx < symtab_hdr->sh_info)
2399 sym = local_syms + r_symndx;
2400 sec = local_sections[r_symndx];
2401 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2403 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2404 if (local_plt == NULL)
2407 /* Address of the PLT slot. */
2408 relocation = (htab->elf.iplt->output_section->vma
2409 + htab->elf.iplt->output_offset
2410 + local_plt[r_symndx].plt.offset);
2414 case R_390_PLTOFF16:
2415 case R_390_PLTOFF32:
2416 relocation -= htab->elf.sgot->output_section->vma;
2418 case R_390_GOTPLT12:
2419 case R_390_GOTPLT16:
2420 case R_390_GOTPLT20:
2421 case R_390_GOTPLT32:
2422 case R_390_GOTPLTENT:
2429 /* Write the PLT slot address into the GOT slot. */
2430 bfd_put_32 (output_bfd, relocation,
2431 htab->elf.sgot->contents +
2432 local_got_offsets[r_symndx]);
2433 relocation = (local_got_offsets[r_symndx] +
2434 htab->elf.sgot->output_offset);
2436 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2437 relocation += htab->elf.sgot->output_section->vma;
2443 /* The output section is needed later in
2444 finish_dynamic_section when creating the dynamic
2446 local_plt[r_symndx].sec = sec;
2450 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2454 bfd_boolean warned ATTRIBUTE_UNUSED;
2455 bfd_boolean ignored ATTRIBUTE_UNUSED;
2457 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2458 r_symndx, symtab_hdr, sym_hashes,
2460 unresolved_reloc, warned, ignored);
2463 if (sec != NULL && discarded_section (sec))
2464 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2465 rel, 1, relend, howto, 0, contents);
2467 if (bfd_link_relocatable (info))
2472 case R_390_GOTPLT12:
2473 case R_390_GOTPLT16:
2474 case R_390_GOTPLT20:
2475 case R_390_GOTPLT32:
2476 case R_390_GOTPLTENT:
2477 /* There are three cases for a GOTPLT relocation. 1) The
2478 relocation is against the jump slot entry of a plt that
2479 will get emitted to the output file. 2) The relocation
2480 is against the jump slot of a plt entry that has been
2481 removed. elf_s390_adjust_gotplt has created a GOT entry
2482 as replacement. 3) The relocation is against a local symbol.
2483 Cases 2) and 3) are the same as the GOT relocation code
2484 so we just have to test for case 1 and fall through for
2486 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2490 if (s390_is_ifunc_symbol_p (h))
2492 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2493 relocation = (plt_index * GOT_ENTRY_SIZE +
2494 htab->elf.igotplt->output_offset);
2495 if (r_type == R_390_GOTPLTENT)
2496 relocation += htab->elf.igotplt->output_section->vma;
2501 Current offset - size first entry / entry size. */
2502 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2505 /* Offset in GOT is PLT index plus GOT headers(3)
2506 times 4, addr & GOT addr. */
2507 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2508 if (r_type == R_390_GOTPLTENT)
2509 relocation += htab->elf.sgot->output_section->vma;
2511 unresolved_reloc = FALSE;
2521 /* Relocation is to the entry for this symbol in the global
2523 if (base_got == NULL)
2530 off = h->got.offset;
2531 dyn = htab->elf.dynamic_sections_created;
2533 if (s390_is_ifunc_symbol_p (h))
2535 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2536 if (off == (bfd_vma)-1)
2538 /* No explicit GOT usage so redirect to the
2540 base_got = htab->elf.igotplt;
2541 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2545 /* Explicit GOT slots must contain the address
2546 of the PLT slot. This will be handled in
2547 finish_dynamic_symbol. */
2550 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2551 bfd_link_pic (info),
2553 || (bfd_link_pic (info)
2554 && SYMBOL_REFERENCES_LOCAL (info, h))
2555 || (ELF_ST_VISIBILITY (h->other)
2556 && h->root.type == bfd_link_hash_undefweak))
2559 /* This is actually a static link, or it is a
2560 -Bsymbolic link and the symbol is defined
2561 locally, or the symbol was forced to be local
2562 because of a version file. We must initialize
2563 this entry in the global offset table. Since the
2564 offset must always be a multiple of 2, we use the
2565 least significant bit to record whether we have
2566 initialized it already.
2568 When doing a dynamic link, we create a .rel.got
2569 relocation entry to initialize the value. This
2570 is done in the finish_dynamic_symbol routine. */
2575 bfd_put_32 (output_bfd, relocation,
2576 base_got->contents + off);
2581 && bfd_link_pic (info)
2582 && SYMBOL_REFERENCES_LOCAL (info, h))
2583 /* lrl rx,sym@GOTENT -> larl rx, sym */
2584 && ((r_type == R_390_GOTENT
2585 && (bfd_get_16 (input_bfd,
2586 contents + rel->r_offset - 2)
2587 & 0xff0f) == 0xc40d)
2588 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2589 || (r_type == R_390_GOT20
2590 && (bfd_get_32 (input_bfd,
2591 contents + rel->r_offset - 2)
2592 & 0xff00f000) == 0xe300c000
2593 && bfd_get_8 (input_bfd,
2594 contents + rel->r_offset + 3) == 0x58)))
2596 unsigned short new_insn =
2597 (0xc000 | (bfd_get_8 (input_bfd,
2598 contents + rel->r_offset - 1) & 0xf0));
2599 bfd_put_16 (output_bfd, new_insn,
2600 contents + rel->r_offset - 2);
2601 r_type = R_390_PC32DBL;
2603 howto = elf_howto_table + r_type;
2604 relocation = h->root.u.def.value
2605 + h->root.u.def.section->output_section->vma
2606 + h->root.u.def.section->output_offset;
2611 unresolved_reloc = FALSE;
2615 if (local_got_offsets == NULL)
2618 off = local_got_offsets[r_symndx];
2620 /* The offset must always be a multiple of 4. We use
2621 the least significant bit to record whether we have
2622 already generated the necessary reloc. */
2627 bfd_put_32 (output_bfd, relocation,
2628 htab->elf.sgot->contents + off);
2630 if (bfd_link_pic (info))
2633 Elf_Internal_Rela outrel;
2636 srelgot = htab->elf.srelgot;
2637 if (srelgot == NULL)
2640 outrel.r_offset = (htab->elf.sgot->output_section->vma
2641 + htab->elf.sgot->output_offset
2643 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2644 outrel.r_addend = relocation;
2645 loc = srelgot->contents;
2646 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2647 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2650 local_got_offsets[r_symndx] |= 1;
2654 if (off >= (bfd_vma) -2)
2657 relocation = base_got->output_offset + off;
2659 /* For @GOTENT the relocation is against the offset between
2660 the instruction and the symbols entry in the GOT and not
2661 between the start of the GOT and the symbols entry. We
2662 add the vma of the GOT to get the correct value. */
2663 if ( r_type == R_390_GOTENT
2664 || r_type == R_390_GOTPLTENT)
2665 relocation += base_got->output_section->vma;
2669 case R_390_GOTOFF16:
2670 case R_390_GOTOFF32:
2671 /* Relocation is relative to the start of the global offset
2675 && s390_is_ifunc_symbol_p (h)
2677 && !bfd_link_executable (info))
2679 relocation = (htab->elf.iplt->output_section->vma
2680 + htab->elf.iplt->output_offset
2682 - htab->elf.sgot->output_section->vma);
2686 /* Note that sgot->output_offset is not involved in this
2687 calculation. We always want the start of .got. If we
2688 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2689 permitted by the ABI, we might have to change this
2691 relocation -= htab->elf.sgot->output_section->vma;
2695 case R_390_GOTPCDBL:
2696 /* Use global offset table as symbol value. */
2697 relocation = htab->elf.sgot->output_section->vma;
2698 unresolved_reloc = FALSE;
2701 case R_390_PLT12DBL:
2702 case R_390_PLT16DBL:
2703 case R_390_PLT24DBL:
2704 case R_390_PLT32DBL:
2706 /* Relocation is to the entry for this symbol in the
2707 procedure linkage table. */
2709 /* Resolve a PLT32 reloc against a local symbol directly,
2710 without using the procedure linkage table. */
2714 if (h->plt.offset == (bfd_vma) -1
2715 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2717 /* We didn't make a PLT entry for this symbol. This
2718 happens when statically linking PIC code, or when
2719 using -Bsymbolic. */
2723 if (s390_is_ifunc_symbol_p (h))
2724 relocation = (htab->elf.iplt->output_section->vma
2725 + htab->elf.iplt->output_offset
2728 relocation = (htab->elf.splt->output_section->vma
2729 + htab->elf.splt->output_offset
2731 unresolved_reloc = FALSE;
2734 case R_390_PLTOFF16:
2735 case R_390_PLTOFF32:
2736 /* Relocation is to the entry for this symbol in the
2737 procedure linkage table relative to the start of the GOT. */
2739 /* For local symbols or if we didn't make a PLT entry for
2740 this symbol resolve the symbol directly. */
2742 || h->plt.offset == (bfd_vma) -1
2743 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2745 relocation -= htab->elf.sgot->output_section->vma;
2749 if (s390_is_ifunc_symbol_p (h))
2750 relocation = (htab->elf.iplt->output_section->vma
2751 + htab->elf.iplt->output_offset
2753 - htab->elf.sgot->output_section->vma);
2755 relocation = (htab->elf.splt->output_section->vma
2756 + htab->elf.splt->output_offset
2758 - htab->elf.sgot->output_section->vma);
2759 unresolved_reloc = FALSE;
2769 && s390_is_ifunc_symbol_p (h)
2771 && !bfd_link_executable (info))
2773 /* This will not work our if the function does not
2774 happen to set up the GOT pointer for some other
2775 reason. 31 bit PLT entries require r12 to hold the
2777 FIXME: Implement an errorcheck.
2778 NOTE: It will work when brasl is not available
2779 (e.g. with -m31 -march=g5) since a local function
2780 call then does use GOTOFF which implies r12 being set
2782 relocation = (htab->elf.iplt->output_section->vma
2783 + htab->elf.iplt->output_offset
2793 && s390_is_ifunc_symbol_p (h)
2796 if (!bfd_link_pic (info) || !h->non_got_ref)
2798 /* For a non-shared object STT_GNU_IFUNC symbol must
2800 relocation = (htab->elf.iplt->output_section->vma
2801 + htab->elf.iplt->output_offset
2807 /* For shared objects a runtime relocation is needed. */
2809 Elf_Internal_Rela outrel;
2812 /* Need a dynamic relocation to get the real function
2814 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2818 if (outrel.r_offset == (bfd_vma) -1
2819 || outrel.r_offset == (bfd_vma) -2)
2822 outrel.r_offset += (input_section->output_section->vma
2823 + input_section->output_offset);
2825 if (h->dynindx == -1
2827 || bfd_link_executable (info))
2829 /* This symbol is resolved locally. */
2830 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2831 outrel.r_addend = (h->root.u.def.value
2832 + h->root.u.def.section->output_section->vma
2833 + h->root.u.def.section->output_offset);
2837 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2838 outrel.r_addend = 0;
2841 sreloc = htab->elf.irelifunc;
2842 elf_append_rela (output_bfd, sreloc, &outrel);
2844 /* If this reloc is against an external symbol, we
2845 do not want to fiddle with the addend. Otherwise,
2846 we need to include the symbol value so that it
2847 becomes an addend for the dynamic reloc. For an
2848 internal symbol, we have updated addend. */
2853 if ((input_section->flags & SEC_ALLOC) == 0)
2856 if ((bfd_link_pic (info)
2858 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2859 || h->root.type != bfd_link_hash_undefweak)
2860 && ((r_type != R_390_PC16
2861 && r_type != R_390_PC12DBL
2862 && r_type != R_390_PC16DBL
2863 && r_type != R_390_PC24DBL
2864 && r_type != R_390_PC32DBL
2865 && r_type != R_390_PC32)
2866 || !SYMBOL_CALLS_LOCAL (info, h)))
2867 || (ELIMINATE_COPY_RELOCS
2868 && !bfd_link_pic (info)
2874 || h->root.type == bfd_link_hash_undefweak
2875 || h->root.type == bfd_link_hash_undefined)))
2877 Elf_Internal_Rela outrel;
2878 bfd_boolean skip, relocate;
2882 /* When generating a shared object, these relocations
2883 are copied into the output file to be resolved at run
2890 _bfd_elf_section_offset (output_bfd, info, input_section,
2892 if (outrel.r_offset == (bfd_vma) -1)
2894 else if (outrel.r_offset == (bfd_vma) -2)
2895 skip = TRUE, relocate = TRUE;
2896 outrel.r_offset += (input_section->output_section->vma
2897 + input_section->output_offset);
2900 memset (&outrel, 0, sizeof outrel);
2903 && (r_type == R_390_PC16
2904 || r_type == R_390_PC12DBL
2905 || r_type == R_390_PC16DBL
2906 || r_type == R_390_PC24DBL
2907 || r_type == R_390_PC32DBL
2908 || r_type == R_390_PC32
2909 || !bfd_link_pic (info)
2910 || !SYMBOLIC_BIND (info, h)
2911 || !h->def_regular))
2913 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2914 outrel.r_addend = rel->r_addend;
2918 /* This symbol is local, or marked to become local. */
2919 outrel.r_addend = relocation + rel->r_addend;
2920 if (r_type == R_390_32)
2923 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2929 if (bfd_is_abs_section (sec))
2931 else if (sec == NULL || sec->owner == NULL)
2933 bfd_set_error(bfd_error_bad_value);
2940 osec = sec->output_section;
2941 sindx = elf_section_data (osec)->dynindx;
2944 osec = htab->elf.text_index_section;
2945 sindx = elf_section_data (osec)->dynindx;
2947 BFD_ASSERT (sindx != 0);
2949 /* We are turning this relocation into one
2950 against a section symbol, so subtract out
2951 the output section's address but not the
2952 offset of the input section in the output
2954 outrel.r_addend -= osec->vma;
2956 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2960 sreloc = elf_section_data (input_section)->sreloc;
2964 loc = sreloc->contents;
2965 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2966 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2968 /* If this reloc is against an external symbol, we do
2969 not want to fiddle with the addend. Otherwise, we
2970 need to include the symbol value so that it becomes
2971 an addend for the dynamic reloc. */
2977 /* Relocations for tls literal pool entries. */
2978 case R_390_TLS_IE32:
2979 if (bfd_link_pic (info))
2981 Elf_Internal_Rela outrel;
2985 outrel.r_offset = rel->r_offset
2986 + input_section->output_section->vma
2987 + input_section->output_offset;
2988 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2989 sreloc = elf_section_data (input_section)->sreloc;
2992 loc = sreloc->contents;
2993 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2994 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2998 case R_390_TLS_GD32:
2999 case R_390_TLS_GOTIE32:
3000 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
3001 tls_type = GOT_UNKNOWN;
3002 if (h == NULL && local_got_offsets)
3003 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3006 tls_type = elf_s390_hash_entry(h)->tls_type;
3007 if (!bfd_link_pic (info)
3009 && tls_type >= GOT_TLS_IE)
3010 r_type = R_390_TLS_LE32;
3012 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
3013 r_type = R_390_TLS_IE32;
3015 if (r_type == R_390_TLS_LE32)
3017 /* This relocation gets optimized away by the local exec
3018 access optimization. */
3019 BFD_ASSERT (! unresolved_reloc);
3020 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3021 contents + rel->r_offset);
3025 if (htab->elf.sgot == NULL)
3029 off = h->got.offset;
3032 if (local_got_offsets == NULL)
3035 off = local_got_offsets[r_symndx];
3044 Elf_Internal_Rela outrel;
3048 if (htab->elf.srelgot == NULL)
3051 outrel.r_offset = (htab->elf.sgot->output_section->vma
3052 + htab->elf.sgot->output_offset + off);
3054 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3055 if (r_type == R_390_TLS_GD32)
3056 dr_type = R_390_TLS_DTPMOD;
3058 dr_type = R_390_TLS_TPOFF;
3059 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3060 outrel.r_addend = relocation - dtpoff_base (info);
3062 outrel.r_addend = 0;
3063 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3064 loc = htab->elf.srelgot->contents;
3065 loc += htab->elf.srelgot->reloc_count++
3066 * sizeof (Elf32_External_Rela);
3067 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3069 if (r_type == R_390_TLS_GD32)
3073 BFD_ASSERT (! unresolved_reloc);
3074 bfd_put_32 (output_bfd,
3075 relocation - dtpoff_base (info),
3076 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3080 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3081 outrel.r_offset += GOT_ENTRY_SIZE;
3082 outrel.r_addend = 0;
3083 htab->elf.srelgot->reloc_count++;
3084 loc += sizeof (Elf32_External_Rela);
3085 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3092 local_got_offsets[r_symndx] |= 1;
3095 if (off >= (bfd_vma) -2)
3097 if (r_type == ELF32_R_TYPE (rel->r_info))
3099 relocation = htab->elf.sgot->output_offset + off;
3100 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3101 relocation += htab->elf.sgot->output_section->vma;
3102 unresolved_reloc = FALSE;
3106 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3107 contents + rel->r_offset);
3112 case R_390_TLS_GOTIE12:
3113 case R_390_TLS_GOTIE20:
3114 case R_390_TLS_IEENT:
3117 if (local_got_offsets == NULL)
3119 off = local_got_offsets[r_symndx];
3120 if (bfd_link_pic (info))
3121 goto emit_tls_relocs;
3125 off = h->got.offset;
3126 tls_type = elf_s390_hash_entry(h)->tls_type;
3127 if (bfd_link_pic (info)
3129 || tls_type < GOT_TLS_IE)
3130 goto emit_tls_relocs;
3133 if (htab->elf.sgot == NULL)
3136 BFD_ASSERT (! unresolved_reloc);
3137 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3138 htab->elf.sgot->contents + off);
3139 relocation = htab->elf.sgot->output_offset + off;
3140 if (r_type == R_390_TLS_IEENT)
3141 relocation += htab->elf.sgot->output_section->vma;
3142 unresolved_reloc = FALSE;
3145 case R_390_TLS_LDM32:
3146 if (! bfd_link_pic (info))
3147 /* The literal pool entry this relocation refers to gets ignored
3148 by the optimized code of the local exec model. Do nothing
3149 and the value will turn out zero. */
3152 if (htab->elf.sgot == NULL)
3155 off = htab->tls_ldm_got.offset;
3160 Elf_Internal_Rela outrel;
3163 if (htab->elf.srelgot == NULL)
3166 outrel.r_offset = (htab->elf.sgot->output_section->vma
3167 + htab->elf.sgot->output_offset + off);
3169 bfd_put_32 (output_bfd, 0,
3170 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3171 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3172 outrel.r_addend = 0;
3173 loc = htab->elf.srelgot->contents;
3174 loc += htab->elf.srelgot->reloc_count++
3175 * sizeof (Elf32_External_Rela);
3176 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3177 htab->tls_ldm_got.offset |= 1;
3179 relocation = htab->elf.sgot->output_offset + off;
3180 unresolved_reloc = FALSE;
3183 case R_390_TLS_LE32:
3184 if (bfd_link_dll (info))
3186 /* Linking a shared library with non-fpic code requires
3187 a R_390_TLS_TPOFF relocation. */
3188 Elf_Internal_Rela outrel;
3193 outrel.r_offset = rel->r_offset
3194 + input_section->output_section->vma
3195 + input_section->output_offset;
3196 if (h != NULL && h->dynindx != -1)
3200 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3202 outrel.r_addend = relocation - dtpoff_base (info);
3204 outrel.r_addend = 0;
3205 sreloc = elf_section_data (input_section)->sreloc;
3208 loc = sreloc->contents;
3209 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3210 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3214 BFD_ASSERT (! unresolved_reloc);
3215 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3216 contents + rel->r_offset);
3220 case R_390_TLS_LDO32:
3221 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3222 relocation -= dtpoff_base (info);
3224 /* When converting LDO to LE, we must negate. */
3225 relocation = -tpoff (info, relocation);
3228 /* Relocations for tls instructions. */
3229 case R_390_TLS_LOAD:
3230 case R_390_TLS_GDCALL:
3231 case R_390_TLS_LDCALL:
3232 tls_type = GOT_UNKNOWN;
3233 if (h == NULL && local_got_offsets)
3234 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3236 tls_type = elf_s390_hash_entry(h)->tls_type;
3238 if (tls_type == GOT_TLS_GD)
3241 if (r_type == R_390_TLS_LOAD)
3243 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3245 /* IE->LE transition. Four valid cases:
3246 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3247 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3248 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3249 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3250 unsigned int insn, ry;
3252 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3254 if ((insn & 0xff00f000) == 0x58000000)
3255 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3256 ry = (insn & 0x000f0000);
3257 else if ((insn & 0xff0f0000) == 0x58000000)
3258 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3259 ry = (insn & 0x0000f000) << 4;
3260 else if ((insn & 0xff00f000) == 0x5800c000)
3261 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3262 ry = (insn & 0x000f0000);
3263 else if ((insn & 0xff0f0000) == 0x580c0000)
3264 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3265 ry = (insn & 0x0000f000) << 4;
3267 invalid_tls_insn (input_bfd, input_section, rel);
3268 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3269 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3272 else if (r_type == R_390_TLS_GDCALL)
3276 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3277 if ((insn & 0xff000fff) != 0x4d000000 &&
3278 (insn & 0xffff0000) != 0xc0e50000 &&
3279 (insn & 0xff000000) != 0x0d000000)
3280 invalid_tls_insn (input_bfd, input_section, rel);
3281 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3283 if ((insn & 0xff000000) == 0x0d000000)
3285 /* GD->LE transition.
3286 basr rx, ry -> nopr r7 */
3287 insn = 0x07070000 | (insn & 0xffff);
3289 else if ((insn & 0xff000000) == 0x4d000000)
3291 /* GD->LE transition.
3292 bas %r14,0(%rx,%r13) -> bc 0,0 */
3297 /* GD->LE transition.
3298 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3300 bfd_put_16 (output_bfd, 0x0000,
3301 contents + rel->r_offset + 4);
3306 /* If basr is used in the pic case to invoke
3307 _tls_get_offset, something went wrong before. */
3308 if ((insn & 0xff000000) == 0x0d000000)
3309 invalid_tls_insn (input_bfd, input_section, rel);
3311 if ((insn & 0xff000000) == 0x4d000000)
3313 /* GD->IE transition.
3314 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3319 /* GD->IE transition.
3320 brasl %r14,__tls_get_addr@plt ->
3321 l %r2,0(%r2,%r12) ; bcr 0,0 */
3323 bfd_put_16 (output_bfd, 0x0700,
3324 contents + rel->r_offset + 4);
3327 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3329 else if (r_type == R_390_TLS_LDCALL)
3331 if (!bfd_link_pic (info))
3335 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3336 if ((insn & 0xff000fff) != 0x4d000000 &&
3337 (insn & 0xffff0000) != 0xc0e50000 &&
3338 (insn & 0xff000000) != 0x0d000000)
3339 invalid_tls_insn (input_bfd, input_section, rel);
3341 if ((insn & 0xff000000) == 0x0d000000)
3343 /* LD->LE transition.
3344 basr rx, ry -> nopr r7 */
3345 insn = 0x07070000 | (insn & 0xffff);
3347 else if ((insn & 0xff000000) == 0x4d000000)
3349 /* LD->LE transition.
3350 bas %r14,0(%rx,%r13) -> bc 0,0 */
3355 /* LD->LE transition.
3356 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3358 bfd_put_16 (output_bfd, 0x0000,
3359 contents + rel->r_offset + 4);
3361 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3370 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3371 because such sections are not SEC_ALLOC and thus ld.so will
3372 not process them. */
3373 if (unresolved_reloc
3374 && !((input_section->flags & SEC_DEBUGGING) != 0
3376 && _bfd_elf_section_offset (output_bfd, info, input_section,
3377 rel->r_offset) != (bfd_vma) -1)
3379 /* xgettext:c-format */
3380 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3383 (long) rel->r_offset,
3385 h->root.root.string);
3389 /* When applying a 24 bit reloc we need to start one byte
3390 earlier. Otherwise the 32 bit get/put bfd operations might
3391 access a byte after the actual section. */
3392 if (r_type == R_390_PC24DBL
3393 || r_type == R_390_PLT24DBL)
3396 if (r_type == R_390_20
3397 || r_type == R_390_GOT20
3398 || r_type == R_390_GOTPLT20
3399 || r_type == R_390_TLS_GOTIE20)
3401 relocation += rel->r_addend;
3402 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3403 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3404 contents, rel->r_offset,
3408 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3409 contents, rel->r_offset,
3410 relocation, rel->r_addend);
3412 if (r != bfd_reloc_ok)
3417 name = h->root.root.string;
3420 name = bfd_elf_string_from_elf_section (input_bfd,
3421 symtab_hdr->sh_link,
3426 name = bfd_section_name (input_bfd, sec);
3429 if (r == bfd_reloc_overflow)
3430 (*info->callbacks->reloc_overflow)
3431 (info, (h ? &h->root : NULL), name, howto->name,
3432 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3436 /* xgettext:c-format */
3437 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3438 input_bfd, input_section,
3439 (long) rel->r_offset, name, (int) r);
3448 /* Generate the PLT slots together with the dynamic relocations needed
3449 for IFUNC symbols. */
3452 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3453 struct bfd_link_info *info,
3454 struct elf_link_hash_entry *h,
3455 struct elf_s390_link_hash_table *htab,
3456 bfd_vma iplt_offset,
3457 bfd_vma resolver_address)
3461 bfd_vma igotiplt_offset;
3462 Elf_Internal_Rela rela;
3464 asection *plt, *gotplt, *relplt;
3465 bfd_vma relative_offset;
3467 if (htab->elf.iplt == NULL
3468 || htab->elf.igotplt == NULL
3469 || htab->elf.irelplt == NULL)
3472 gotplt = htab->elf.igotplt;
3473 relplt = htab->elf.irelplt;
3475 /* Index of the PLT slot within iplt section. */
3476 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3477 plt = htab->elf.iplt;
3478 /* Offset into the igot.plt section. */
3479 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3480 /* Offset into the got section. */
3481 got_offset = igotiplt_offset + gotplt->output_offset;
3483 /* S390 uses halfwords for relative branch calc! */
3484 relative_offset = - (plt->output_offset +
3485 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3486 /* If offset is > 32768, branch to a previous branch
3487 390 can only handle +-64 K jumps. */
3488 if ( -32768 > (int) relative_offset )
3490 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3492 /* Fill in the entry in the procedure linkage table. */
3493 if (!bfd_link_pic (info))
3495 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3498 /* Adjust jump to the first plt entry. */
3499 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3500 plt->contents + iplt_offset + 20);
3502 /* Push the GOT offset field. */
3503 bfd_put_32 (output_bfd,
3504 (gotplt->output_section->vma
3506 plt->contents + iplt_offset + 24);
3508 else if (got_offset < 4096)
3510 /* The GOT offset is small enough to be used directly as
3512 memcpy (plt->contents + iplt_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_pic16_entry content. */
3519 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3520 plt->contents + iplt_offset + 2);
3522 /* Adjust the jump to the first plt entry. */
3523 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3524 plt->contents + iplt_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 (plt->contents + iplt_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 plt->contents + iplt_offset + 2);
3539 /* Adjust the jump to the first plt entry. */
3540 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3541 plt->contents + iplt_offset + 20);
3545 memcpy (plt->contents + iplt_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 plt->contents + iplt_offset + 20);
3553 /* Push the GOT offset field. */
3554 bfd_put_32 (output_bfd, got_offset,
3555 plt->contents + iplt_offset + 24);
3557 /* Insert offset into reloc. table here. */
3558 bfd_put_32 (output_bfd, relplt->output_offset +
3559 iplt_index * RELA_ENTRY_SIZE,
3560 plt->contents + iplt_offset + 28);
3562 /* Fill in the entry in the global offset table.
3563 Points to instruction after GOT offset. */
3564 bfd_put_32 (output_bfd,
3565 (plt->output_section->vma
3566 + plt->output_offset
3569 gotplt->contents + igotiplt_offset);
3571 /* Fill in the entry in the .rela.plt section. */
3572 rela.r_offset = gotplt->output_section->vma + got_offset;
3576 || ((bfd_link_executable (info)
3577 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3580 /* The symbol can be locally resolved. */
3581 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3582 rela.r_addend = resolver_address;
3586 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3590 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3591 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3594 /* Finish up dynamic symbol handling. We set the contents of various
3595 dynamic sections here. */
3598 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3599 struct bfd_link_info *info,
3600 struct elf_link_hash_entry *h,
3601 Elf_Internal_Sym *sym)
3603 struct elf_s390_link_hash_table *htab;
3604 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3606 htab = elf_s390_hash_table (info);
3608 if (h->plt.offset != (bfd_vma) -1)
3612 Elf_Internal_Rela rela;
3614 bfd_vma relative_offset;
3616 /* This symbol has an entry in the procedure linkage table. Set
3618 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3620 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3621 htab, h->plt.offset,
3622 eh->ifunc_resolver_address +
3623 eh->ifunc_resolver_section->output_offset +
3624 eh->ifunc_resolver_section->output_section->vma);
3625 /* Do not return yet. Handling of explicit GOT slots of
3626 IFUNC symbols is below. */
3630 if (h->dynindx == -1
3631 || htab->elf.splt == NULL
3632 || htab->elf.sgotplt == NULL
3633 || htab->elf.srelplt == NULL)
3637 Current offset - size first entry / entry size. */
3638 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3640 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3642 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3644 /* S390 uses halfwords for relative branch calc! */
3645 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3646 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3647 /* If offset is > 32768, branch to a previous branch
3648 390 can only handle +-64 K jumps. */
3649 if ( -32768 > (int) relative_offset )
3651 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3653 /* Fill in the entry in the procedure linkage table. */
3654 if (!bfd_link_pic (info))
3656 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3659 /* Adjust jump to the first plt entry. */
3660 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3661 htab->elf.splt->contents + h->plt.offset + 20);
3663 /* Push the GOT offset field. */
3664 bfd_put_32 (output_bfd,
3665 (htab->elf.sgotplt->output_section->vma
3666 + htab->elf.sgotplt->output_offset
3668 htab->elf.splt->contents + h->plt.offset + 24);
3670 else if (got_offset < 4096)
3672 /* The GOT offset is small enough to be used directly as
3674 memcpy (htab->elf.splt->contents + h->plt.offset,
3675 elf_s390_plt_pic12_entry,
3678 /* Put in the GOT offset as displacement value. The 0xc000
3679 value comes from the first word of the plt entry. Look
3680 at the elf_s390_plt_pic12_entry content. */
3681 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3682 htab->elf.splt->contents + h->plt.offset + 2);
3684 /* Adjust the jump to the first plt entry. */
3685 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3686 htab->elf.splt->contents + h->plt.offset + 20);
3688 else if (got_offset < 32768)
3690 /* The GOT offset is too big for a displacement but small
3691 enough to be a signed 16 bit immediate value as it can be
3692 used in an lhi instruction. */
3693 memcpy (htab->elf.splt->contents + h->plt.offset,
3694 elf_s390_plt_pic16_entry,
3697 /* Put in the GOT offset for the lhi instruction. */
3698 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3699 htab->elf.splt->contents + h->plt.offset + 2);
3701 /* Adjust the jump to the first plt entry. */
3702 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3703 htab->elf.splt->contents + h->plt.offset + 20);
3707 memcpy (htab->elf.splt->contents + h->plt.offset,
3708 elf_s390_plt_pic_entry,
3711 /* Adjust the jump to the first plt entry. */
3712 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3713 htab->elf.splt->contents + h->plt.offset + 20);
3715 /* Push the GOT offset field. */
3716 bfd_put_32 (output_bfd, got_offset,
3717 htab->elf.splt->contents + h->plt.offset + 24);
3719 /* Insert offset into reloc. table here. */
3720 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3721 htab->elf.splt->contents + h->plt.offset + 28);
3723 /* Fill in the entry in the global offset table.
3724 Points to instruction after GOT offset. */
3725 bfd_put_32 (output_bfd,
3726 (htab->elf.splt->output_section->vma
3727 + htab->elf.splt->output_offset
3730 htab->elf.sgotplt->contents + got_offset);
3732 /* Fill in the entry in the .rela.plt section. */
3733 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3734 + htab->elf.sgotplt->output_offset
3736 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3738 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3739 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3741 if (!h->def_regular)
3743 /* Mark the symbol as undefined, rather than as defined in
3744 the .plt section. Leave the value alone. This is a clue
3745 for the dynamic linker, to make function pointer
3746 comparisons work between an application and shared
3748 sym->st_shndx = SHN_UNDEF;
3753 if (h->got.offset != (bfd_vma) -1
3754 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3755 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3756 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3758 Elf_Internal_Rela rela;
3761 /* This symbol has an entry in the global offset table. Set it
3764 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3767 rela.r_offset = (htab->elf.sgot->output_section->vma
3768 + htab->elf.sgot->output_offset
3769 + (h->got.offset &~ (bfd_vma) 1));
3771 /* If this is a static link, or it is a -Bsymbolic link and the
3772 symbol is defined locally or was forced to be local because
3773 of a version file, we just want to emit a RELATIVE reloc.
3774 The entry in the global offset table will already have been
3775 initialized in the relocate_section function. */
3776 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3778 if (bfd_link_pic (info))
3780 /* An explicit GOT slot usage needs GLOB_DAT. If the
3781 symbol references local the implicit got.iplt slot
3782 will be used and the IRELATIVE reloc has been created
3788 /* For non-shared objects explicit GOT slots must be
3789 filled with the PLT slot address for pointer
3790 equality reasons. */
3791 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3792 + htab->elf.iplt->output_offset
3794 htab->elf.sgot->contents + h->got.offset);
3798 else if (bfd_link_pic (info)
3799 && SYMBOL_REFERENCES_LOCAL (info, h))
3801 /* If this is a static link, or it is a -Bsymbolic link and
3802 the symbol is defined locally or was forced to be local
3803 because of a version file, we just want to emit a
3804 RELATIVE reloc. The entry in the global offset table
3805 will already have been initialized in the
3806 relocate_section function. */
3807 if (!h->def_regular)
3809 BFD_ASSERT((h->got.offset & 1) != 0);
3810 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3811 rela.r_addend = (h->root.u.def.value
3812 + h->root.u.def.section->output_section->vma
3813 + h->root.u.def.section->output_offset);
3817 BFD_ASSERT((h->got.offset & 1) == 0);
3819 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3820 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3824 loc = htab->elf.srelgot->contents;
3825 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3826 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3831 Elf_Internal_Rela rela;
3834 /* This symbols needs a copy reloc. Set it up. */
3836 if (h->dynindx == -1
3837 || (h->root.type != bfd_link_hash_defined
3838 && h->root.type != bfd_link_hash_defweak)
3839 || htab->srelbss == NULL)
3842 rela.r_offset = (h->root.u.def.value
3843 + h->root.u.def.section->output_section->vma
3844 + h->root.u.def.section->output_offset);
3845 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3847 loc = htab->srelbss->contents;
3848 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3849 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3852 /* Mark some specially defined symbols as absolute. */
3853 if (h == htab->elf.hdynamic
3854 || h == htab->elf.hgot
3855 || h == htab->elf.hplt)
3856 sym->st_shndx = SHN_ABS;
3861 /* Used to decide how to sort relocs in an optimal manner for the
3862 dynamic linker, before writing them out. */
3864 static enum elf_reloc_type_class
3865 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3866 const asection *rel_sec ATTRIBUTE_UNUSED,
3867 const Elf_Internal_Rela *rela)
3869 bfd *abfd = info->output_bfd;
3870 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3871 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3872 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3873 Elf_Internal_Sym sym;
3875 if (htab->elf.dynsym == NULL
3876 || !bed->s->swap_symbol_in (abfd,
3877 (htab->elf.dynsym->contents
3878 + r_symndx * bed->s->sizeof_sym),
3882 /* Check relocation against STT_GNU_IFUNC symbol. */
3883 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3884 return reloc_class_ifunc;
3886 switch ((int) ELF32_R_TYPE (rela->r_info))
3888 case R_390_RELATIVE:
3889 return reloc_class_relative;
3890 case R_390_JMP_SLOT:
3891 return reloc_class_plt;
3893 return reloc_class_copy;
3895 return reloc_class_normal;
3899 /* Finish up the dynamic sections. */
3902 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3903 struct bfd_link_info *info)
3905 struct elf_s390_link_hash_table *htab;
3911 htab = elf_s390_hash_table (info);
3912 dynobj = htab->elf.dynobj;
3913 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3915 if (htab->elf.dynamic_sections_created)
3917 Elf32_External_Dyn *dyncon, *dynconend;
3919 if (sdyn == NULL || htab->elf.sgot == NULL)
3922 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3923 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3924 for (; dyncon < dynconend; dyncon++)
3926 Elf_Internal_Dyn dyn;
3929 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3937 s = htab->elf.sgotplt;
3938 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3942 s = htab->elf.srelplt;
3943 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3947 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3951 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3954 /* Fill in the special first entry in the procedure linkage table. */
3955 if (htab->elf.splt && htab->elf.splt->size > 0)
3957 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3958 if (bfd_link_pic (info))
3960 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3961 PLT_FIRST_ENTRY_SIZE);
3965 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3966 PLT_FIRST_ENTRY_SIZE);
3967 bfd_put_32 (output_bfd,
3968 htab->elf.sgotplt->output_section->vma
3969 + htab->elf.sgotplt->output_offset,
3970 htab->elf.splt->contents + 24);
3972 elf_section_data (htab->elf.splt->output_section)
3973 ->this_hdr.sh_entsize = 4;
3978 if (htab->elf.sgotplt)
3980 /* Fill in the first three entries in the global offset table. */
3981 if (htab->elf.sgotplt->size > 0)
3983 bfd_put_32 (output_bfd,
3984 (sdyn == NULL ? (bfd_vma) 0
3985 : sdyn->output_section->vma + sdyn->output_offset),
3986 htab->elf.sgotplt->contents);
3987 /* One entry for shared object struct ptr. */
3988 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3989 /* One entry for _dl_runtime_resolve. */
3990 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3993 elf_section_data (htab->elf.sgotplt->output_section)
3994 ->this_hdr.sh_entsize = 4;
3996 /* Finish dynamic symbol for local IFUNC symbols. */
3997 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3999 struct plt_entry *local_plt;
4000 Elf_Internal_Sym *isym;
4001 Elf_Internal_Shdr *symtab_hdr;
4003 symtab_hdr = &elf_symtab_hdr (ibfd);
4005 local_plt = elf_s390_local_plt (ibfd);
4006 if (local_plt != NULL)
4007 for (i = 0; i < symtab_hdr->sh_info; i++)
4009 if (local_plt[i].plt.offset != (bfd_vma) -1)
4011 asection *sec = local_plt[i].sec;
4012 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
4016 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4017 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
4018 local_plt[i].plt.offset,
4020 + sec->output_section->vma
4021 + sec->output_offset);
4029 /* Support for core dump NOTE sections. */
4032 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
4037 switch (note->descsz)
4042 case 224: /* S/390 Linux. */
4044 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4047 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
4055 /* Make a ".reg/999" section. */
4056 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4057 size, note->descpos + offset);
4061 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
4063 switch (note->descsz)
4068 case 124: /* sizeof(struct elf_prpsinfo) on s390 */
4069 elf_tdata (abfd)->core->pid
4070 = bfd_get_32 (abfd, note->descdata + 12);
4071 elf_tdata (abfd)->core->program
4072 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
4073 elf_tdata (abfd)->core->command
4074 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
4078 /* Note that for some reason, a spurious space is tacked
4079 onto the end of the args in some (at least one anyway)
4080 implementations, so strip it off if it exists. */
4083 char *command = elf_tdata (abfd)->core->command;
4084 int n = strlen (command);
4086 if (0 < n && command[n - 1] == ' ')
4087 command[n - 1] = '\0';
4094 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
4106 char data[124] = { 0 };
4107 const char *fname, *psargs;
4109 va_start (ap, note_type);
4110 fname = va_arg (ap, const char *);
4111 psargs = va_arg (ap, const char *);
4114 strncpy (data + 28, fname, 16);
4115 strncpy (data + 44, psargs, 80);
4116 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4117 &data, sizeof (data));
4122 char data[224] = { 0 };
4127 va_start (ap, note_type);
4128 pid = va_arg (ap, long);
4129 cursig = va_arg (ap, int);
4130 gregs = va_arg (ap, const void *);
4133 bfd_put_16 (abfd, cursig, data + 12);
4134 bfd_put_32 (abfd, pid, data + 24);
4135 memcpy (data + 72, gregs, 144);
4136 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
4137 &data, sizeof (data));
4143 /* Return address for Ith PLT stub in section PLT, for relocation REL
4144 or (bfd_vma) -1 if it should not be included. */
4147 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4148 const arelent *rel ATTRIBUTE_UNUSED)
4150 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4153 /* Merge backend specific data from an object file to the output
4154 object file when linking. */
4157 elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4159 bfd *obfd = info->output_bfd;
4161 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4164 if (!elf_s390_merge_obj_attributes (ibfd, info))
4167 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4172 #define TARGET_BIG_SYM s390_elf32_vec
4173 #define TARGET_BIG_NAME "elf32-s390"
4174 #define ELF_ARCH bfd_arch_s390
4175 #define ELF_TARGET_ID S390_ELF_DATA
4176 #define ELF_MACHINE_CODE EM_S390
4177 #define ELF_MACHINE_ALT1 EM_S390_OLD
4178 #define ELF_MAXPAGESIZE 0x1000
4180 #define elf_backend_can_gc_sections 1
4181 #define elf_backend_can_refcount 1
4182 #define elf_backend_want_got_plt 1
4183 #define elf_backend_plt_readonly 1
4184 #define elf_backend_want_plt_sym 0
4185 #define elf_backend_got_header_size 12
4186 #define elf_backend_rela_normal 1
4188 #define elf_info_to_howto elf_s390_info_to_howto
4190 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4191 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4192 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4193 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4195 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4197 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4198 #define elf_backend_check_relocs elf_s390_check_relocs
4199 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4200 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4201 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4202 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4203 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4204 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4205 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4206 #define elf_backend_relocate_section elf_s390_relocate_section
4207 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4208 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4209 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4210 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4211 #define elf_backend_write_core_note elf_s390_write_core_note
4212 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4213 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4214 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4216 #define bfd_elf32_mkobject elf_s390_mkobject
4217 #define elf_backend_object_p elf_s390_object_p
4219 #include "elf32-target.h"