1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2011, 2012 Free Software Foundation, Inc.
4 Contributed by Carl B. Pedersen and Martin Schwidefsky.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 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 0, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
45 FALSE, /* pc_relative */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
53 FALSE), /* pcrel_offset */
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
166 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
168 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
170 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
174 /* GNU extension to record C++ vtable hierarchy. */
175 static reloc_howto_type elf32_s390_vtinherit_howto =
176 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
177 static reloc_howto_type elf32_s390_vtentry_howto =
178 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
180 static reloc_howto_type *
181 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182 bfd_reloc_code_real_type code)
187 return &elf_howto_table[(int) R_390_NONE];
189 return &elf_howto_table[(int) R_390_8];
190 case BFD_RELOC_390_12:
191 return &elf_howto_table[(int) R_390_12];
193 return &elf_howto_table[(int) R_390_16];
195 return &elf_howto_table[(int) R_390_32];
197 return &elf_howto_table[(int) R_390_32];
198 case BFD_RELOC_32_PCREL:
199 return &elf_howto_table[(int) R_390_PC32];
200 case BFD_RELOC_390_GOT12:
201 return &elf_howto_table[(int) R_390_GOT12];
202 case BFD_RELOC_32_GOT_PCREL:
203 return &elf_howto_table[(int) R_390_GOT32];
204 case BFD_RELOC_390_PLT32:
205 return &elf_howto_table[(int) R_390_PLT32];
206 case BFD_RELOC_390_COPY:
207 return &elf_howto_table[(int) R_390_COPY];
208 case BFD_RELOC_390_GLOB_DAT:
209 return &elf_howto_table[(int) R_390_GLOB_DAT];
210 case BFD_RELOC_390_JMP_SLOT:
211 return &elf_howto_table[(int) R_390_JMP_SLOT];
212 case BFD_RELOC_390_RELATIVE:
213 return &elf_howto_table[(int) R_390_RELATIVE];
214 case BFD_RELOC_32_GOTOFF:
215 return &elf_howto_table[(int) R_390_GOTOFF32];
216 case BFD_RELOC_390_GOTPC:
217 return &elf_howto_table[(int) R_390_GOTPC];
218 case BFD_RELOC_390_GOT16:
219 return &elf_howto_table[(int) R_390_GOT16];
220 case BFD_RELOC_16_PCREL:
221 return &elf_howto_table[(int) R_390_PC16];
222 case BFD_RELOC_390_PC12DBL:
223 return &elf_howto_table[(int) R_390_PC12DBL];
224 case BFD_RELOC_390_PLT12DBL:
225 return &elf_howto_table[(int) R_390_PLT12DBL];
226 case BFD_RELOC_390_PC16DBL:
227 return &elf_howto_table[(int) R_390_PC16DBL];
228 case BFD_RELOC_390_PLT16DBL:
229 return &elf_howto_table[(int) R_390_PLT16DBL];
230 case BFD_RELOC_390_PC24DBL:
231 return &elf_howto_table[(int) R_390_PC24DBL];
232 case BFD_RELOC_390_PLT24DBL:
233 return &elf_howto_table[(int) R_390_PLT24DBL];
234 case BFD_RELOC_390_PC32DBL:
235 return &elf_howto_table[(int) R_390_PC32DBL];
236 case BFD_RELOC_390_PLT32DBL:
237 return &elf_howto_table[(int) R_390_PLT32DBL];
238 case BFD_RELOC_390_GOTPCDBL:
239 return &elf_howto_table[(int) R_390_GOTPCDBL];
240 case BFD_RELOC_390_GOTENT:
241 return &elf_howto_table[(int) R_390_GOTENT];
242 case BFD_RELOC_16_GOTOFF:
243 return &elf_howto_table[(int) R_390_GOTOFF16];
244 case BFD_RELOC_390_GOTPLT12:
245 return &elf_howto_table[(int) R_390_GOTPLT12];
246 case BFD_RELOC_390_GOTPLT16:
247 return &elf_howto_table[(int) R_390_GOTPLT16];
248 case BFD_RELOC_390_GOTPLT32:
249 return &elf_howto_table[(int) R_390_GOTPLT32];
250 case BFD_RELOC_390_GOTPLTENT:
251 return &elf_howto_table[(int) R_390_GOTPLTENT];
252 case BFD_RELOC_390_PLTOFF16:
253 return &elf_howto_table[(int) R_390_PLTOFF16];
254 case BFD_RELOC_390_PLTOFF32:
255 return &elf_howto_table[(int) R_390_PLTOFF32];
256 case BFD_RELOC_390_TLS_LOAD:
257 return &elf_howto_table[(int) R_390_TLS_LOAD];
258 case BFD_RELOC_390_TLS_GDCALL:
259 return &elf_howto_table[(int) R_390_TLS_GDCALL];
260 case BFD_RELOC_390_TLS_LDCALL:
261 return &elf_howto_table[(int) R_390_TLS_LDCALL];
262 case BFD_RELOC_390_TLS_GD32:
263 return &elf_howto_table[(int) R_390_TLS_GD32];
264 case BFD_RELOC_390_TLS_GOTIE12:
265 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266 case BFD_RELOC_390_TLS_GOTIE32:
267 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268 case BFD_RELOC_390_TLS_LDM32:
269 return &elf_howto_table[(int) R_390_TLS_LDM32];
270 case BFD_RELOC_390_TLS_IE32:
271 return &elf_howto_table[(int) R_390_TLS_IE32];
272 case BFD_RELOC_390_TLS_IEENT:
273 return &elf_howto_table[(int) R_390_TLS_IEENT];
274 case BFD_RELOC_390_TLS_LE32:
275 return &elf_howto_table[(int) R_390_TLS_LE32];
276 case BFD_RELOC_390_TLS_LDO32:
277 return &elf_howto_table[(int) R_390_TLS_LDO32];
278 case BFD_RELOC_390_TLS_DTPMOD:
279 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280 case BFD_RELOC_390_TLS_DTPOFF:
281 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282 case BFD_RELOC_390_TLS_TPOFF:
283 return &elf_howto_table[(int) R_390_TLS_TPOFF];
284 case BFD_RELOC_390_20:
285 return &elf_howto_table[(int) R_390_20];
286 case BFD_RELOC_390_GOT20:
287 return &elf_howto_table[(int) R_390_GOT20];
288 case BFD_RELOC_390_GOTPLT20:
289 return &elf_howto_table[(int) R_390_GOTPLT20];
290 case BFD_RELOC_390_TLS_GOTIE20:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292 case BFD_RELOC_390_IRELATIVE:
293 return &elf_howto_table[(int) R_390_IRELATIVE];
294 case BFD_RELOC_VTABLE_INHERIT:
295 return &elf32_s390_vtinherit_howto;
296 case BFD_RELOC_VTABLE_ENTRY:
297 return &elf32_s390_vtentry_howto;
304 static reloc_howto_type *
305 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
310 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311 if (elf_howto_table[i].name != NULL
312 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313 return &elf_howto_table[i];
315 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316 return &elf32_s390_vtinherit_howto;
317 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318 return &elf32_s390_vtentry_howto;
323 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
324 and elf32-s390.c has its own copy. */
327 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
329 Elf_Internal_Rela *dst)
331 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
334 case R_390_GNU_VTINHERIT:
335 cache_ptr->howto = &elf32_s390_vtinherit_howto;
338 case R_390_GNU_VTENTRY:
339 cache_ptr->howto = &elf32_s390_vtentry_howto;
343 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
345 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
349 cache_ptr->howto = &elf_howto_table[r_type];
353 /* A relocation function which doesn't do anything. */
354 static bfd_reloc_status_type
355 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
356 arelent *reloc_entry,
357 asymbol *symbol ATTRIBUTE_UNUSED,
358 void * data ATTRIBUTE_UNUSED,
359 asection *input_section,
361 char **error_message ATTRIBUTE_UNUSED)
364 reloc_entry->address += input_section->output_offset;
368 /* Handle the large displacement relocs. */
369 static bfd_reloc_status_type
370 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
371 arelent *reloc_entry,
373 void * data ATTRIBUTE_UNUSED,
374 asection *input_section,
376 char **error_message ATTRIBUTE_UNUSED)
378 reloc_howto_type *howto = reloc_entry->howto;
382 if (output_bfd != (bfd *) NULL
383 && (symbol->flags & BSF_SECTION_SYM) == 0
384 && (! howto->partial_inplace
385 || reloc_entry->addend == 0))
387 reloc_entry->address += input_section->output_offset;
391 if (output_bfd != NULL)
392 return bfd_reloc_continue;
394 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
395 return bfd_reloc_outofrange;
397 relocation = (symbol->value
398 + symbol->section->output_section->vma
399 + symbol->section->output_offset);
400 relocation += reloc_entry->addend;
401 if (howto->pc_relative)
403 relocation -= (input_section->output_section->vma
404 + input_section->output_offset);
405 relocation -= reloc_entry->address;
408 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
409 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
410 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
412 if ((bfd_signed_vma) relocation < - 0x80000
413 || (bfd_signed_vma) relocation > 0x7ffff)
414 return bfd_reloc_overflow;
420 elf_s390_is_local_label_name (bfd *abfd, const char *name)
422 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
425 return _bfd_elf_is_local_label_name (abfd, name);
428 /* Functions for the 390 ELF linker. */
430 /* The name of the dynamic interpreter. This is put in the .interp
433 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
435 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
436 copying dynamic variables from a shared lib into an app's dynbss
437 section, and instead use a dynamic relocation to point into the
439 #define ELIMINATE_COPY_RELOCS 1
441 /* The size in bytes of the first entry in the procedure linkage table. */
442 #define PLT_FIRST_ENTRY_SIZE 32
443 /* The size in bytes of an entry in the procedure linkage table. */
444 #define PLT_ENTRY_SIZE 32
446 #define GOT_ENTRY_SIZE 4
448 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
450 /* The first three entries in a procedure linkage table are reserved,
451 and the initial contents are unimportant (we zero them out).
452 Subsequent entries look like this. See the SVR4 ABI 386
453 supplement to see how this works. */
455 /* For the s390, simple addr offset can only be 0 - 4096.
456 To use the full 2 GB address space, several instructions
457 are needed to load an address in a register and execute
458 a branch( or just saving the address)
460 Furthermore, only r 0 and 1 are free to use!!! */
462 /* The first 3 words in the GOT are then reserved.
463 Word 0 is the address of the dynamic table.
464 Word 1 is a pointer to a structure describing the object
465 Word 2 is used to point to the loader entry address.
467 The code for position independent PLT entries looks like this:
469 r12 holds addr of the current GOT at entry to the PLT
471 The GOT holds the address in the PLT to be executed.
472 The loader then gets:
473 24(15) = Pointer to the structure describing the object.
474 28(15) = Offset into rela.plt
476 The loader must then find the module where the function is
477 and insert the address in the GOT.
479 Note: 390 can only address +- 64 K relative.
480 We check if offset > 65536, then make a relative branch -64xxx
481 back to a previous defined branch
483 PLT1: BASR 1,0 # 2 bytes
484 L 1,22(1) # 4 bytes Load offset in GOT in r 1
485 L 1,(1,12) # 4 bytes Load address from GOT in r1
486 BCR 15,1 # 2 bytes Jump to address
487 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
488 L 1,14(1) # 4 bytes Load offset in symol table in r1
489 BRC 15,-x # 4 bytes Jump to start of PLT
490 .word 0 # 2 bytes filler
491 .long ? # 4 bytes offset in GOT
492 .long ? # 4 bytes offset into rela.plt
494 This was the general case. There are two additional, optimizes PLT
495 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
496 First the one for GOT offsets < 4096:
498 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
499 BCR 15,1 # 2 bytes Jump to address
500 .word 0,0,0 # 6 bytes filler
501 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
502 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
503 BRC 15,-x # 4 bytes Jump to start of PLT
504 .word 0,0,0 # 6 bytes filler
505 .long ? # 4 bytes offset into rela.plt
507 Second the one for GOT offsets < 32768:
509 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
510 L 1,(1,12) # 4 bytes Load address from GOT to r1
511 BCR 15,1 # 2 bytes Jump to address
512 .word 0 # 2 bytes filler
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
514 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
515 BRC 15,-x # 4 bytes Jump to start of PLT
516 .word 0,0,0 # 6 bytes filler
517 .long ? # 4 bytes offset into rela.plt
519 Total = 32 bytes per PLT entry
521 The code for static build PLT entries looks like this:
523 PLT1: BASR 1,0 # 2 bytes
524 L 1,22(1) # 4 bytes Load address of GOT entry
525 L 1,0(0,1) # 4 bytes Load address from GOT in r1
526 BCR 15,1 # 2 bytes Jump to address
527 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
528 L 1,14(1) # 4 bytes Load offset in symbol table in r1
529 BRC 15,-x # 4 bytes Jump to start of PLT
530 .word 0 # 2 bytes filler
531 .long ? # 4 bytes address of GOT entry
532 .long ? # 4 bytes offset into rela.plt */
534 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
536 0x0d, 0x10, /* basr %r1,%r0 */
537 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
538 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
539 0x07, 0xf1, /* br %r1 */
540 0x0d, 0x10, /* basr %r1,%r0 */
541 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
542 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
543 0x00, 0x00, /* padding */
544 0x00, 0x00, 0x00, 0x00, /* GOT offset */
545 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
548 /* Generic PLT pic entry. */
549 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
551 0x0d, 0x10, /* basr %r1,%r0 */
552 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
553 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
554 0x07, 0xf1, /* br %r1 */
555 0x0d, 0x10, /* basr %r1,%r0 */
556 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
557 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
558 0x00, 0x00, /* padding */
559 0x00, 0x00, 0x00, 0x00, /* GOT offset */
560 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
563 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
564 when generating the PLT slot with the GOT offset. */
565 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
567 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
568 0x07, 0xf1, /* br %r1 */
569 0x00, 0x00, 0x00, 0x00, /* padding */
571 0x0d, 0x10, /* basr %r1,%r0 */
572 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
573 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
574 0x00, 0x00, 0x00, 0x00,
575 0x00, 0x00, 0x00, 0x00
578 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
579 when generating the PLT slot with the GOT offset. */
580 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
582 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
583 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
584 0x07, 0xf1, /* br %r1 */
586 0x0d, 0x10, /* basr %r1,%r0 */
587 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
588 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
589 0x00, 0x00, 0x00, 0x00,
590 0x00, 0x00, 0x00, 0x00,
594 /* The first PLT entry pushes the offset into the rela.plt
595 from R1 onto the stack at 8(15) and the loader object info
596 at 12(15), loads the loader address in R1 and jumps to it. */
598 /* The first entry in the PLT for PIC code:
601 ST 1,28(15) # R1 has offset into rela.plt
602 L 1,4(12) # Get loader ino(object struct address)
603 ST 1,24(15) # Store address
604 L 1,8(12) # Entry address of loader in R1
605 BR 1 # Jump to loader
607 The first entry in the PLT for static code:
610 ST 1,28(15) # R1 has offset into rela.plt
612 L 1,18(0,1) # Get address of GOT
613 MVC 24(4,15),4(1) # Move loader ino to stack
614 L 1,8(1) # Get address of loader
615 BR 1 # Jump to loader
617 .long got # address of GOT */
619 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
621 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
622 0x0d, 0x10, /* basr %r1,%r0 */
623 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
624 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
625 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
626 0x07, 0xf1, /* br %r1 */
627 0x00, 0x00, 0x00, 0x00,
628 0x00, 0x00, 0x00, 0x00,
632 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
634 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
635 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
636 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
637 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
638 0x07, 0xf1, /* br %r1 */
639 0x00, 0x00, 0x00, 0x00,
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00, 0x00, 0x00,
646 /* s390 ELF linker hash entry. */
648 struct elf_s390_link_hash_entry
650 struct elf_link_hash_entry elf;
652 /* Track dynamic relocs copied for this symbol. */
653 struct elf_dyn_relocs *dyn_relocs;
655 /* Number of GOTPLT references for a function. */
656 bfd_signed_vma gotplt_refcount;
658 #define GOT_UNKNOWN 0
662 #define GOT_TLS_IE_NLT 4
663 unsigned char tls_type;
665 /* For pointer equality reasons we might need to change the symbol
666 type from STT_GNU_IFUNC to STT_FUNC together with its value and
667 section entry. So after alloc_dynrelocs only these values should
668 be used. In order to check whether a symbol is IFUNC use
669 s390_is_ifunc_symbol_p. */
670 bfd_vma ifunc_resolver_address;
671 asection *ifunc_resolver_section;
674 #define elf_s390_hash_entry(ent) \
675 ((struct elf_s390_link_hash_entry *)(ent))
677 /* This structure represents an entry in the local PLT list needed for
678 local IFUNC symbols. */
681 /* The section of the local symbol.
682 Set in relocate_section and used in finish_dynamic_sections. */
687 bfd_signed_vma refcount;
692 /* NOTE: Keep this structure in sync with
693 the one declared in elf64-s390.c. */
694 struct elf_s390_obj_tdata
696 struct elf_obj_tdata root;
698 /* A local PLT is needed for ifunc symbols. */
699 struct plt_entry *local_plt;
701 /* TLS type for each local got entry. */
702 char *local_got_tls_type;
705 #define elf_s390_tdata(abfd) \
706 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
708 #define elf_s390_local_plt(abfd) \
709 (elf_s390_tdata (abfd)->local_plt)
711 #define elf_s390_local_got_tls_type(abfd) \
712 (elf_s390_tdata (abfd)->local_got_tls_type)
714 #define is_s390_elf(bfd) \
715 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
716 && elf_tdata (bfd) != NULL \
717 && elf_object_id (bfd) == S390_ELF_DATA)
720 elf_s390_mkobject (bfd *abfd)
722 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
727 elf_s390_object_p (bfd *abfd)
729 /* Set the right machine number for an s390 elf32 file. */
730 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
733 /* s390 ELF linker hash table. */
735 struct elf_s390_link_hash_table
737 struct elf_link_hash_table elf;
739 /* Short-cuts to get to dynamic linker sections. */
746 bfd_signed_vma refcount;
750 /* Small local sym cache. */
751 struct sym_cache sym_cache;
754 /* Get the s390 ELF linker hash table from a link_info structure. */
756 #define elf_s390_hash_table(p) \
757 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
758 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
761 #include "elf-s390-common.c"
763 /* Create an entry in an s390 ELF linker hash table. */
765 static struct bfd_hash_entry *
766 link_hash_newfunc (struct bfd_hash_entry *entry,
767 struct bfd_hash_table *table,
770 /* Allocate the structure if it has not already been allocated by a
774 entry = bfd_hash_allocate (table,
775 sizeof (struct elf_s390_link_hash_entry));
780 /* Call the allocation method of the superclass. */
781 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
784 struct elf_s390_link_hash_entry *eh;
786 eh = (struct elf_s390_link_hash_entry *) entry;
787 eh->dyn_relocs = NULL;
788 eh->gotplt_refcount = 0;
789 eh->tls_type = GOT_UNKNOWN;
790 eh->ifunc_resolver_address = 0;
791 eh->ifunc_resolver_section = NULL;
797 /* Create an s390 ELF linker hash table. */
799 static struct bfd_link_hash_table *
800 elf_s390_link_hash_table_create (bfd *abfd)
802 struct elf_s390_link_hash_table *ret;
803 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
805 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
809 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
810 sizeof (struct elf_s390_link_hash_entry),
817 return &ret->elf.root;
820 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
821 shortcuts to them in our hash table. */
824 create_got_section (bfd *dynobj, struct bfd_link_info *info)
826 struct elf_s390_link_hash_table *htab;
828 if (! _bfd_elf_create_got_section (dynobj, info))
831 htab = elf_s390_hash_table (info);
832 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
833 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
834 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
835 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
841 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
842 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
846 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
848 struct elf_s390_link_hash_table *htab;
850 htab = elf_s390_hash_table (info);
851 if (!htab->elf.sgot && !create_got_section (dynobj, info))
854 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
857 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
858 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
859 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
861 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
863 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
864 || (!info->shared && !htab->srelbss))
870 /* Copy the extra info we tack onto an elf_link_hash_entry. */
873 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
874 struct elf_link_hash_entry *dir,
875 struct elf_link_hash_entry *ind)
877 struct elf_s390_link_hash_entry *edir, *eind;
879 edir = (struct elf_s390_link_hash_entry *) dir;
880 eind = (struct elf_s390_link_hash_entry *) ind;
882 if (eind->dyn_relocs != NULL)
884 if (edir->dyn_relocs != NULL)
886 struct elf_dyn_relocs **pp;
887 struct elf_dyn_relocs *p;
889 /* Add reloc counts against the indirect sym to the direct sym
890 list. Merge any entries against the same section. */
891 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
893 struct elf_dyn_relocs *q;
895 for (q = edir->dyn_relocs; q != NULL; q = q->next)
896 if (q->sec == p->sec)
898 q->pc_count += p->pc_count;
899 q->count += p->count;
906 *pp = edir->dyn_relocs;
909 edir->dyn_relocs = eind->dyn_relocs;
910 eind->dyn_relocs = NULL;
913 if (ind->root.type == bfd_link_hash_indirect
914 && dir->got.refcount <= 0)
916 edir->tls_type = eind->tls_type;
917 eind->tls_type = GOT_UNKNOWN;
920 if (ELIMINATE_COPY_RELOCS
921 && ind->root.type != bfd_link_hash_indirect
922 && dir->dynamic_adjusted)
924 /* If called to transfer flags for a weakdef during processing
925 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
926 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
927 dir->ref_dynamic |= ind->ref_dynamic;
928 dir->ref_regular |= ind->ref_regular;
929 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
930 dir->needs_plt |= ind->needs_plt;
933 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
937 elf_s390_tls_transition (struct bfd_link_info *info,
949 return R_390_TLS_LE32;
950 return R_390_TLS_IE32;
951 case R_390_TLS_GOTIE32:
953 return R_390_TLS_LE32;
954 return R_390_TLS_GOTIE32;
955 case R_390_TLS_LDM32:
956 return R_390_TLS_LE32;
962 /* Look through the relocs for a section during the first phase, and
963 allocate space in the global offset table or procedure linkage
967 elf_s390_check_relocs (bfd *abfd,
968 struct bfd_link_info *info,
970 const Elf_Internal_Rela *relocs)
972 struct elf_s390_link_hash_table *htab;
973 Elf_Internal_Shdr *symtab_hdr;
974 struct elf_link_hash_entry **sym_hashes;
975 const Elf_Internal_Rela *rel;
976 const Elf_Internal_Rela *rel_end;
978 bfd_signed_vma *local_got_refcounts;
979 int tls_type, old_tls_type;
980 Elf_Internal_Sym *isym;
982 if (info->relocatable)
985 BFD_ASSERT (is_s390_elf (abfd));
987 htab = elf_s390_hash_table (info);
988 symtab_hdr = &elf_symtab_hdr (abfd);
989 sym_hashes = elf_sym_hashes (abfd);
990 local_got_refcounts = elf_local_got_refcounts (abfd);
994 rel_end = relocs + sec->reloc_count;
995 for (rel = relocs; rel < rel_end; rel++)
998 unsigned long r_symndx;
999 struct elf_link_hash_entry *h;
1001 r_symndx = ELF32_R_SYM (rel->r_info);
1003 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1005 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1010 if (r_symndx < symtab_hdr->sh_info)
1012 /* A local symbol. */
1013 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1018 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1020 struct plt_entry *plt;
1022 if (htab->elf.dynobj == NULL)
1023 htab->elf.dynobj = abfd;
1025 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1028 if (local_got_refcounts == NULL)
1030 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1032 local_got_refcounts = elf_local_got_refcounts (abfd);
1034 plt = elf_s390_local_plt (abfd);
1035 plt[r_symndx].plt.refcount++;
1041 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1042 while (h->root.type == bfd_link_hash_indirect
1043 || h->root.type == bfd_link_hash_warning)
1044 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1046 /* PR15323, ref flags aren't set for references in the same
1048 h->root.non_ir_ref = 1;
1051 /* Create got section and local_got_refcounts array if they
1053 r_type = elf_s390_tls_transition (info,
1054 ELF32_R_TYPE (rel->r_info),
1063 case R_390_GOTPLT12:
1064 case R_390_GOTPLT16:
1065 case R_390_GOTPLT20:
1066 case R_390_GOTPLT32:
1067 case R_390_GOTPLTENT:
1068 case R_390_TLS_GD32:
1069 case R_390_TLS_GOTIE12:
1070 case R_390_TLS_GOTIE20:
1071 case R_390_TLS_GOTIE32:
1072 case R_390_TLS_IEENT:
1073 case R_390_TLS_IE32:
1074 case R_390_TLS_LDM32:
1076 && local_got_refcounts == NULL)
1078 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1080 local_got_refcounts = elf_local_got_refcounts (abfd);
1083 case R_390_GOTOFF16:
1084 case R_390_GOTOFF32:
1086 case R_390_GOTPCDBL:
1087 if (htab->elf.sgot == NULL)
1089 if (htab->elf.dynobj == NULL)
1090 htab->elf.dynobj = abfd;
1091 if (!create_got_section (htab->elf.dynobj, info))
1098 if (htab->elf.dynobj == NULL)
1099 htab->elf.dynobj = abfd;
1100 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1103 /* Make sure an IFUNC symbol defined in a non-shared object
1104 always gets a PLT slot. */
1105 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1107 /* The symbol is called by the dynamic loader in order
1108 to resolve the relocation. So it is in fact also
1116 case R_390_GOTOFF16:
1117 case R_390_GOTOFF32:
1119 case R_390_GOTPCDBL:
1120 /* These relocs do not need a GOT slot. They just load the
1121 GOT pointer itself or address something else relative to
1122 the GOT. Since the GOT pointer has been set up above we
1126 case R_390_PLT12DBL:
1127 case R_390_PLT16DBL:
1128 case R_390_PLT24DBL:
1129 case R_390_PLT32DBL:
1131 case R_390_PLTOFF16:
1132 case R_390_PLTOFF32:
1133 /* This symbol requires a procedure linkage table entry. We
1134 actually build the entry in adjust_dynamic_symbol,
1135 because this might be a case of linking PIC code which is
1136 never referenced by a dynamic object, in which case we
1137 don't need to generate a procedure linkage table entry
1140 /* If this is a local symbol, we resolve it directly without
1141 creating a procedure linkage table entry. */
1145 h->plt.refcount += 1;
1149 case R_390_GOTPLT12:
1150 case R_390_GOTPLT16:
1151 case R_390_GOTPLT20:
1152 case R_390_GOTPLT32:
1153 case R_390_GOTPLTENT:
1154 /* This symbol requires either a procedure linkage table entry
1155 or an entry in the local got. We actually build the entry
1156 in adjust_dynamic_symbol because whether this is really a
1157 global reference can change and with it the fact if we have
1158 to create a plt entry or a local got entry. To be able to
1159 make a once global symbol a local one we have to keep track
1160 of the number of gotplt references that exist for this
1164 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1166 h->plt.refcount += 1;
1169 local_got_refcounts[r_symndx] += 1;
1172 case R_390_TLS_LDM32:
1173 htab->tls_ldm_got.refcount += 1;
1176 case R_390_TLS_IE32:
1177 case R_390_TLS_GOTIE12:
1178 case R_390_TLS_GOTIE20:
1179 case R_390_TLS_GOTIE32:
1180 case R_390_TLS_IEENT:
1182 info->flags |= DF_STATIC_TLS;
1190 case R_390_TLS_GD32:
1191 /* This symbol requires a global offset table entry. */
1200 tls_type = GOT_NORMAL;
1202 case R_390_TLS_GD32:
1203 tls_type = GOT_TLS_GD;
1205 case R_390_TLS_IE32:
1206 case R_390_TLS_GOTIE32:
1207 tls_type = GOT_TLS_IE;
1209 case R_390_TLS_GOTIE12:
1210 case R_390_TLS_GOTIE20:
1211 case R_390_TLS_IEENT:
1212 tls_type = GOT_TLS_IE_NLT;
1218 h->got.refcount += 1;
1219 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1223 local_got_refcounts[r_symndx] += 1;
1224 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1226 /* If a TLS symbol is accessed using IE at least once,
1227 there is no point to use dynamic model for it. */
1228 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1230 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1232 (*_bfd_error_handler)
1233 (_("%B: `%s' accessed both as normal and thread local symbol"),
1234 abfd, h->root.root.string);
1237 if (old_tls_type > tls_type)
1238 tls_type = old_tls_type;
1241 if (old_tls_type != tls_type)
1244 elf_s390_hash_entry (h)->tls_type = tls_type;
1246 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1249 if (r_type != R_390_TLS_IE32)
1253 case R_390_TLS_LE32:
1256 info->flags |= DF_STATIC_TLS;
1270 /* If this reloc is in a read-only section, we might
1271 need a copy reloc. We can't check reliably at this
1272 stage whether the section is read-only, as input
1273 sections have not yet been mapped to output sections.
1274 Tentatively set the flag for now, and correct in
1275 adjust_dynamic_symbol. */
1280 /* We may need a .plt entry if the function this reloc
1281 refers to is in a shared lib. */
1282 h->plt.refcount += 1;
1286 /* If we are creating a shared library, and this is a reloc
1287 against a global symbol, or a non PC relative reloc
1288 against a local symbol, then we need to copy the reloc
1289 into the shared library. However, if we are linking with
1290 -Bsymbolic, we do not need to copy a reloc against a
1291 global symbol which is defined in an object we are
1292 including in the link (i.e., DEF_REGULAR is set). At
1293 this point we have not seen all the input files, so it is
1294 possible that DEF_REGULAR is not set now but will be set
1295 later (it is never cleared). In case of a weak definition,
1296 DEF_REGULAR may be cleared later by a strong definition in
1297 a shared library. We account for that possibility below by
1298 storing information in the relocs_copied field of the hash
1299 table entry. A similar situation occurs when creating
1300 shared libraries and symbol visibility changes render the
1303 If on the other hand, we are creating an executable, we
1304 may need to keep relocations for symbols satisfied by a
1305 dynamic library if we manage to avoid copy relocs for the
1308 && (sec->flags & SEC_ALLOC) != 0
1309 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1310 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1311 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1312 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1313 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1314 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1316 && (! SYMBOLIC_BIND (info, h)
1317 || h->root.type == bfd_link_hash_defweak
1318 || !h->def_regular))))
1319 || (ELIMINATE_COPY_RELOCS
1321 && (sec->flags & SEC_ALLOC) != 0
1323 && (h->root.type == bfd_link_hash_defweak
1324 || !h->def_regular)))
1326 struct elf_dyn_relocs *p;
1327 struct elf_dyn_relocs **head;
1329 /* We must copy these reloc types into the output file.
1330 Create a reloc section in dynobj and make room for
1334 if (htab->elf.dynobj == NULL)
1335 htab->elf.dynobj = abfd;
1337 sreloc = _bfd_elf_make_dynamic_reloc_section
1338 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1344 /* If this is a global symbol, we count the number of
1345 relocations we need for this symbol. */
1348 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1352 /* Track dynamic relocs needed for local syms too.
1353 We really need local syms available to do this
1358 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1363 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1367 vpp = &elf_section_data (s)->local_dynrel;
1368 head = (struct elf_dyn_relocs **) vpp;
1372 if (p == NULL || p->sec != sec)
1374 bfd_size_type amt = sizeof *p;
1376 p = ((struct elf_dyn_relocs *)
1377 bfd_alloc (htab->elf.dynobj, amt));
1388 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1389 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1390 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1391 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1392 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1393 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1398 /* This relocation describes the C++ object vtable hierarchy.
1399 Reconstruct it for later use during GC. */
1400 case R_390_GNU_VTINHERIT:
1401 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1405 /* This relocation describes which C++ vtable entries are actually
1406 used. Record for later use during GC. */
1407 case R_390_GNU_VTENTRY:
1408 BFD_ASSERT (h != NULL);
1410 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1422 /* Return the section that should be marked against GC for a given
1426 elf_s390_gc_mark_hook (asection *sec,
1427 struct bfd_link_info *info,
1428 Elf_Internal_Rela *rel,
1429 struct elf_link_hash_entry *h,
1430 Elf_Internal_Sym *sym)
1433 switch (ELF32_R_TYPE (rel->r_info))
1435 case R_390_GNU_VTINHERIT:
1436 case R_390_GNU_VTENTRY:
1439 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1443 /* Update the got entry reference counts for the section being removed. */
1446 elf_s390_gc_sweep_hook (bfd *abfd,
1447 struct bfd_link_info *info,
1449 const Elf_Internal_Rela *relocs)
1451 struct elf_s390_link_hash_table *htab;
1452 Elf_Internal_Shdr *symtab_hdr;
1453 struct elf_link_hash_entry **sym_hashes;
1454 bfd_signed_vma *local_got_refcounts;
1455 const Elf_Internal_Rela *rel, *relend;
1457 if (info->relocatable)
1460 htab = elf_s390_hash_table (info);
1464 elf_section_data (sec)->local_dynrel = NULL;
1466 symtab_hdr = &elf_symtab_hdr (abfd);
1467 sym_hashes = elf_sym_hashes (abfd);
1468 local_got_refcounts = elf_local_got_refcounts (abfd);
1470 relend = relocs + sec->reloc_count;
1471 for (rel = relocs; rel < relend; rel++)
1473 unsigned long r_symndx;
1474 unsigned int r_type;
1475 struct elf_link_hash_entry *h = NULL;
1477 r_symndx = ELF32_R_SYM (rel->r_info);
1478 if (r_symndx >= symtab_hdr->sh_info)
1480 struct elf_s390_link_hash_entry *eh;
1481 struct elf_dyn_relocs **pp;
1482 struct elf_dyn_relocs *p;
1484 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1485 while (h->root.type == bfd_link_hash_indirect
1486 || h->root.type == bfd_link_hash_warning)
1487 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1488 eh = (struct elf_s390_link_hash_entry *) h;
1490 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1493 /* Everything must go for SEC. */
1500 Elf_Internal_Sym *isym;
1502 /* A local symbol. */
1503 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1508 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1510 struct plt_entry *plt = elf_s390_local_plt (abfd);
1511 if (plt[r_symndx].plt.refcount > 0)
1512 plt[r_symndx].plt.refcount--;
1516 r_type = ELF32_R_TYPE (rel->r_info);
1517 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1520 case R_390_TLS_LDM32:
1521 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1522 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1525 case R_390_TLS_GD32:
1526 case R_390_TLS_IE32:
1527 case R_390_TLS_GOTIE12:
1528 case R_390_TLS_GOTIE20:
1529 case R_390_TLS_GOTIE32:
1530 case R_390_TLS_IEENT:
1535 case R_390_GOTOFF16:
1536 case R_390_GOTOFF32:
1538 case R_390_GOTPCDBL:
1542 if (h->got.refcount > 0)
1543 h->got.refcount -= 1;
1545 else if (local_got_refcounts != NULL)
1547 if (local_got_refcounts[r_symndx] > 0)
1548 local_got_refcounts[r_symndx] -= 1;
1567 case R_390_PLT12DBL:
1568 case R_390_PLT16DBL:
1569 case R_390_PLT24DBL:
1570 case R_390_PLT32DBL:
1572 case R_390_PLTOFF16:
1573 case R_390_PLTOFF32:
1576 if (h->plt.refcount > 0)
1577 h->plt.refcount -= 1;
1581 case R_390_GOTPLT12:
1582 case R_390_GOTPLT16:
1583 case R_390_GOTPLT20:
1584 case R_390_GOTPLT32:
1585 case R_390_GOTPLTENT:
1588 if (h->plt.refcount > 0)
1590 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1591 h->plt.refcount -= 1;
1594 else if (local_got_refcounts != NULL)
1596 if (local_got_refcounts[r_symndx] > 0)
1597 local_got_refcounts[r_symndx] -= 1;
1609 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1610 entry but we found we will not create any. Called when we find we will
1611 not have any PLT for this symbol, by for example
1612 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1613 or elf_s390_size_dynamic_sections if no dynamic sections will be
1614 created (we're only linking static objects). */
1617 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1619 if (h->elf.root.type == bfd_link_hash_warning)
1620 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1622 if (h->gotplt_refcount <= 0)
1625 /* We simply add the number of gotplt references to the number
1626 * of got references for this symbol. */
1627 h->elf.got.refcount += h->gotplt_refcount;
1628 h->gotplt_refcount = -1;
1631 /* Adjust a symbol defined by a dynamic object and referenced by a
1632 regular object. The current definition is in some section of the
1633 dynamic object, but we're not including those sections. We have to
1634 change the definition to something the rest of the link can
1638 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1639 struct elf_link_hash_entry *h)
1641 struct elf_s390_link_hash_table *htab;
1644 /* STT_GNU_IFUNC symbol must go through PLT. */
1645 if (s390_is_ifunc_symbol_p (h))
1648 /* If this is a function, put it in the procedure linkage table. We
1649 will fill in the contents of the procedure linkage table later
1650 (although we could actually do it here). */
1651 if (h->type == STT_FUNC
1654 if (h->plt.refcount <= 0
1655 || SYMBOL_CALLS_LOCAL (info, h)
1656 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1657 && h->root.type != bfd_link_hash_undefweak))
1659 /* This case can occur if we saw a PLT32 reloc in an input
1660 file, but the symbol was never referred to by a dynamic
1661 object, or if all references were garbage collected. In
1662 such a case, we don't actually need to build a procedure
1663 linkage table, and we can just do a PC32 reloc instead. */
1664 h->plt.offset = (bfd_vma) -1;
1666 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1672 /* It's possible that we incorrectly decided a .plt reloc was
1673 needed for an R_390_PC32 reloc to a non-function sym in
1674 check_relocs. We can't decide accurately between function and
1675 non-function syms in check-relocs; Objects loaded later in
1676 the link may change h->type. So fix it now. */
1677 h->plt.offset = (bfd_vma) -1;
1679 /* If this is a weak symbol, and there is a real definition, the
1680 processor independent code will have arranged for us to see the
1681 real definition first, and we can just use the same value. */
1682 if (h->u.weakdef != NULL)
1684 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1685 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1686 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1687 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1688 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1689 h->non_got_ref = h->u.weakdef->non_got_ref;
1693 /* This is a reference to a symbol defined by a dynamic object which
1694 is not a function. */
1696 /* If we are creating a shared library, we must presume that the
1697 only references to the symbol are via the global offset table.
1698 For such cases we need not do anything here; the relocations will
1699 be handled correctly by relocate_section. */
1703 /* If there are no references to this symbol that do not use the
1704 GOT, we don't need to generate a copy reloc. */
1705 if (!h->non_got_ref)
1708 /* If -z nocopyreloc was given, we won't generate them either. */
1709 if (info->nocopyreloc)
1715 if (ELIMINATE_COPY_RELOCS)
1717 struct elf_s390_link_hash_entry * eh;
1718 struct elf_dyn_relocs *p;
1720 eh = (struct elf_s390_link_hash_entry *) h;
1721 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1723 s = p->sec->output_section;
1724 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1728 /* If we didn't find any dynamic relocs in read-only sections, then
1729 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1737 /* We must allocate the symbol in our .dynbss section, which will
1738 become part of the .bss section of the executable. There will be
1739 an entry for this symbol in the .dynsym section. The dynamic
1740 object will contain position independent code, so all references
1741 from the dynamic object to this symbol will go through the global
1742 offset table. The dynamic linker will use the .dynsym entry to
1743 determine the address it must put in the global offset table, so
1744 both the dynamic object and the regular object will refer to the
1745 same memory location for the variable. */
1747 htab = elf_s390_hash_table (info);
1749 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1750 copy the initial value out of the dynamic object and into the
1751 runtime process image. */
1752 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1754 htab->srelbss->size += sizeof (Elf32_External_Rela);
1760 return _bfd_elf_adjust_dynamic_copy (h, s);
1763 /* Allocate space in .plt, .got and associated reloc sections for
1767 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1769 struct bfd_link_info *info;
1770 struct elf_s390_link_hash_table *htab;
1771 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1772 struct elf_dyn_relocs *p;
1774 if (h->root.type == bfd_link_hash_indirect)
1777 info = (struct bfd_link_info *) inf;
1778 htab = elf_s390_hash_table (info);
1780 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1781 here if it is defined and referenced in a non-shared object. */
1782 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1783 return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1785 else if (htab->elf.dynamic_sections_created
1786 && h->plt.refcount > 0)
1788 /* Make sure this symbol is output as a dynamic symbol.
1789 Undefined weak syms won't yet be marked as dynamic. */
1790 if (h->dynindx == -1
1791 && !h->forced_local)
1793 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1798 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1800 asection *s = htab->elf.splt;
1802 /* If this is the first .plt entry, make room for the special
1805 s->size += PLT_FIRST_ENTRY_SIZE;
1807 h->plt.offset = s->size;
1809 /* If this symbol is not defined in a regular file, and we are
1810 not generating a shared library, then set the symbol to this
1811 location in the .plt. This is required to make function
1812 pointers compare as equal between the normal executable and
1813 the shared library. */
1817 h->root.u.def.section = s;
1818 h->root.u.def.value = h->plt.offset;
1821 /* Make room for this entry. */
1822 s->size += PLT_ENTRY_SIZE;
1824 /* We also need to make an entry in the .got.plt section, which
1825 will be placed in the .got section by the linker script. */
1826 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1828 /* We also need to make an entry in the .rela.plt section. */
1829 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1833 h->plt.offset = (bfd_vma) -1;
1835 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1840 h->plt.offset = (bfd_vma) -1;
1842 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1845 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1846 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1847 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1848 we can save the dynamic TLS relocation. */
1849 if (h->got.refcount > 0
1852 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1854 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1855 /* For the GOTIE access without a literal pool entry the offset has
1856 to be stored somewhere. The immediate value in the instruction
1857 is not bit enough so the value is stored in the got. */
1859 h->got.offset = htab->elf.sgot->size;
1860 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1863 h->got.offset = (bfd_vma) -1;
1865 else if (h->got.refcount > 0)
1869 int tls_type = elf_s390_hash_entry(h)->tls_type;
1871 /* Make sure this symbol is output as a dynamic symbol.
1872 Undefined weak syms won't yet be marked as dynamic. */
1873 if (h->dynindx == -1
1874 && !h->forced_local)
1876 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1881 h->got.offset = s->size;
1882 s->size += GOT_ENTRY_SIZE;
1883 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1884 if (tls_type == GOT_TLS_GD)
1885 s->size += GOT_ENTRY_SIZE;
1886 dyn = htab->elf.dynamic_sections_created;
1887 /* R_390_TLS_IE32 needs one dynamic relocation,
1888 R_390_TLS_GD32 needs one if local symbol and two if global. */
1889 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1890 || tls_type >= GOT_TLS_IE)
1891 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1892 else if (tls_type == GOT_TLS_GD)
1893 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1894 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1895 || h->root.type != bfd_link_hash_undefweak)
1897 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1898 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1901 h->got.offset = (bfd_vma) -1;
1903 if (eh->dyn_relocs == NULL)
1906 /* In the shared -Bsymbolic case, discard space allocated for
1907 dynamic pc-relative relocs against symbols which turn out to be
1908 defined in regular objects. For the normal shared case, discard
1909 space for pc-relative relocs that have become local due to symbol
1910 visibility changes. */
1914 if (SYMBOL_CALLS_LOCAL (info, h))
1916 struct elf_dyn_relocs **pp;
1918 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1920 p->count -= p->pc_count;
1929 /* Also discard relocs on undefined weak syms with non-default
1931 if (eh->dyn_relocs != NULL
1932 && h->root.type == bfd_link_hash_undefweak)
1934 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1935 eh->dyn_relocs = NULL;
1937 /* Make sure undefined weak symbols are output as a dynamic
1939 else if (h->dynindx == -1
1940 && !h->forced_local)
1942 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1947 else if (ELIMINATE_COPY_RELOCS)
1949 /* For the non-shared case, discard space for relocs against
1950 symbols which turn out to need copy relocs or are not
1956 || (htab->elf.dynamic_sections_created
1957 && (h->root.type == bfd_link_hash_undefweak
1958 || h->root.type == bfd_link_hash_undefined))))
1960 /* Make sure this symbol is output as a dynamic symbol.
1961 Undefined weak syms won't yet be marked as dynamic. */
1962 if (h->dynindx == -1
1963 && !h->forced_local)
1965 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1969 /* If that succeeded, we know we'll be keeping all the
1971 if (h->dynindx != -1)
1975 eh->dyn_relocs = NULL;
1980 /* Finally, allocate space. */
1981 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1983 asection *sreloc = elf_section_data (p->sec)->sreloc;
1985 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1991 /* Find any dynamic relocs that apply to read-only sections. */
1994 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1996 struct elf_s390_link_hash_entry *eh;
1997 struct elf_dyn_relocs *p;
1999 eh = (struct elf_s390_link_hash_entry *) h;
2000 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2002 asection *s = p->sec->output_section;
2004 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2006 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2008 info->flags |= DF_TEXTREL;
2010 /* Not an error, just cut short the traversal. */
2017 /* Set the sizes of the dynamic sections. */
2020 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2021 struct bfd_link_info *info)
2023 struct elf_s390_link_hash_table *htab;
2029 htab = elf_s390_hash_table (info);
2030 dynobj = htab->elf.dynobj;
2034 if (htab->elf.dynamic_sections_created)
2036 /* Set the contents of the .interp section to the interpreter. */
2037 if (info->executable)
2039 s = bfd_get_linker_section (dynobj, ".interp");
2042 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2043 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2047 /* Set up .got offsets for local syms, and space for local dynamic
2049 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2051 bfd_signed_vma *local_got;
2052 bfd_signed_vma *end_local_got;
2053 char *local_tls_type;
2054 bfd_size_type locsymcount;
2055 Elf_Internal_Shdr *symtab_hdr;
2057 struct plt_entry *local_plt;
2060 if (! is_s390_elf (ibfd))
2063 for (s = ibfd->sections; s != NULL; s = s->next)
2065 struct elf_dyn_relocs *p;
2067 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2069 if (!bfd_is_abs_section (p->sec)
2070 && bfd_is_abs_section (p->sec->output_section))
2072 /* Input section has been discarded, either because
2073 it is a copy of a linkonce section or due to
2074 linker script /DISCARD/, so we'll be discarding
2077 else if (p->count != 0)
2079 srela = elf_section_data (p->sec)->sreloc;
2080 srela->size += p->count * sizeof (Elf32_External_Rela);
2081 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2082 info->flags |= DF_TEXTREL;
2087 local_got = elf_local_got_refcounts (ibfd);
2091 symtab_hdr = &elf_symtab_hdr (ibfd);
2092 locsymcount = symtab_hdr->sh_info;
2093 end_local_got = local_got + locsymcount;
2094 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2096 srela = htab->elf.srelgot;
2097 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2101 *local_got = s->size;
2102 s->size += GOT_ENTRY_SIZE;
2103 if (*local_tls_type == GOT_TLS_GD)
2104 s->size += GOT_ENTRY_SIZE;
2106 srela->size += sizeof (Elf32_External_Rela);
2109 *local_got = (bfd_vma) -1;
2111 local_plt = elf_s390_local_plt (ibfd);
2112 for (i = 0; i < symtab_hdr->sh_info; i++)
2114 if (local_plt[i].plt.refcount > 0)
2116 local_plt[i].plt.offset = htab->elf.iplt->size;
2117 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2118 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2119 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2122 local_plt[i].plt.offset = (bfd_vma) -1;
2126 if (htab->tls_ldm_got.refcount > 0)
2128 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2130 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2131 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2132 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2135 htab->tls_ldm_got.offset = -1;
2137 /* Allocate global sym .plt and .got entries, and space for global
2138 sym dynamic relocs. */
2139 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2141 /* We now have determined the sizes of the various dynamic sections.
2142 Allocate memory for them. */
2144 for (s = dynobj->sections; s != NULL; s = s->next)
2146 if ((s->flags & SEC_LINKER_CREATED) == 0)
2149 if (s == htab->elf.splt
2150 || s == htab->elf.sgot
2151 || s == htab->elf.sgotplt
2152 || s == htab->sdynbss
2153 || s == htab->elf.iplt
2154 || s == htab->elf.igotplt
2155 || s == htab->irelifunc)
2157 /* Strip this section if we don't need it; see the
2160 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2165 /* We use the reloc_count field as a counter if we need
2166 to copy relocs into the output file. */
2171 /* It's not one of our sections, so don't allocate space. */
2177 /* If we don't need this section, strip it from the
2178 output file. This is to handle .rela.bss and
2179 .rela.plt. We must create it in
2180 create_dynamic_sections, because it must be created
2181 before the linker maps input sections to output
2182 sections. The linker does that before
2183 adjust_dynamic_symbol is called, and it is that
2184 function which decides whether anything needs to go
2185 into these sections. */
2187 s->flags |= SEC_EXCLUDE;
2191 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2194 /* Allocate memory for the section contents. We use bfd_zalloc
2195 here in case unused entries are not reclaimed before the
2196 section's contents are written out. This should not happen,
2197 but this way if it does, we get a R_390_NONE reloc instead
2199 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2200 if (s->contents == NULL)
2204 if (htab->elf.dynamic_sections_created)
2206 /* Add some entries to the .dynamic section. We fill in the
2207 values later, in elf_s390_finish_dynamic_sections, but we
2208 must add the entries now so that we get the correct size for
2209 the .dynamic section. The DT_DEBUG entry is filled in by the
2210 dynamic linker and used by the debugger. */
2211 #define add_dynamic_entry(TAG, VAL) \
2212 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2214 if (info->executable)
2216 if (!add_dynamic_entry (DT_DEBUG, 0))
2220 if (htab->elf.splt->size != 0)
2222 if (!add_dynamic_entry (DT_PLTGOT, 0)
2223 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2224 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2225 || !add_dynamic_entry (DT_JMPREL, 0))
2231 if (!add_dynamic_entry (DT_RELA, 0)
2232 || !add_dynamic_entry (DT_RELASZ, 0)
2233 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2236 /* If any dynamic relocs apply to a read-only section,
2237 then we need a DT_TEXTREL entry. */
2238 if ((info->flags & DF_TEXTREL) == 0)
2239 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2241 if ((info->flags & DF_TEXTREL) != 0)
2243 if (!add_dynamic_entry (DT_TEXTREL, 0))
2248 #undef add_dynamic_entry
2253 /* Return the base VMA address which should be subtracted from real addresses
2254 when resolving @dtpoff relocation.
2255 This is PT_TLS segment p_vaddr. */
2258 dtpoff_base (struct bfd_link_info *info)
2260 /* If tls_sec is NULL, we should have signalled an error already. */
2261 if (elf_hash_table (info)->tls_sec == NULL)
2263 return elf_hash_table (info)->tls_sec->vma;
2266 /* Return the relocation value for @tpoff relocation
2267 if STT_TLS virtual address is ADDRESS. */
2270 tpoff (struct bfd_link_info *info, bfd_vma address)
2272 struct elf_link_hash_table *htab = elf_hash_table (info);
2274 /* If tls_sec is NULL, we should have signalled an error already. */
2275 if (htab->tls_sec == NULL)
2277 return htab->tls_size + htab->tls_sec->vma - address;
2280 /* Complain if TLS instruction relocation is against an invalid
2284 invalid_tls_insn (bfd *input_bfd,
2285 asection *input_section,
2286 Elf_Internal_Rela *rel)
2288 reloc_howto_type *howto;
2290 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2291 (*_bfd_error_handler)
2292 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2295 (long) rel->r_offset,
2297 bfd_set_error (bfd_error_bad_value);
2300 /* Relocate a 390 ELF section. */
2303 elf_s390_relocate_section (bfd *output_bfd,
2304 struct bfd_link_info *info,
2306 asection *input_section,
2308 Elf_Internal_Rela *relocs,
2309 Elf_Internal_Sym *local_syms,
2310 asection **local_sections)
2312 struct elf_s390_link_hash_table *htab;
2313 Elf_Internal_Shdr *symtab_hdr;
2314 struct elf_link_hash_entry **sym_hashes;
2315 bfd_vma *local_got_offsets;
2316 Elf_Internal_Rela *rel;
2317 Elf_Internal_Rela *relend;
2319 BFD_ASSERT (is_s390_elf (input_bfd));
2321 htab = elf_s390_hash_table (info);
2322 symtab_hdr = &elf_symtab_hdr (input_bfd);
2323 sym_hashes = elf_sym_hashes (input_bfd);
2324 local_got_offsets = elf_local_got_offsets (input_bfd);
2327 relend = relocs + input_section->reloc_count;
2328 for (; rel < relend; rel++)
2330 unsigned int r_type;
2331 reloc_howto_type *howto;
2332 unsigned long r_symndx;
2333 struct elf_link_hash_entry *h;
2334 Elf_Internal_Sym *sym;
2338 bfd_boolean unresolved_reloc;
2339 bfd_reloc_status_type r;
2341 asection *base_got = htab->elf.sgot;
2343 r_type = ELF32_R_TYPE (rel->r_info);
2344 if (r_type == (int) R_390_GNU_VTINHERIT
2345 || r_type == (int) R_390_GNU_VTENTRY)
2347 if (r_type >= (int) R_390_max)
2349 bfd_set_error (bfd_error_bad_value);
2353 howto = elf_howto_table + r_type;
2354 r_symndx = ELF32_R_SYM (rel->r_info);
2359 unresolved_reloc = FALSE;
2360 if (r_symndx < symtab_hdr->sh_info)
2362 sym = local_syms + r_symndx;
2363 sec = local_sections[r_symndx];
2364 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2366 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2367 if (local_plt == NULL)
2370 /* Address of the PLT slot. */
2371 relocation = (htab->elf.iplt->output_section->vma
2372 + htab->elf.iplt->output_offset
2373 + local_plt[r_symndx].plt.offset);
2377 case R_390_PLTOFF16:
2378 case R_390_PLTOFF32:
2379 relocation -= htab->elf.sgot->output_section->vma;
2381 case R_390_GOTPLT12:
2382 case R_390_GOTPLT16:
2383 case R_390_GOTPLT20:
2384 case R_390_GOTPLT32:
2385 case R_390_GOTPLTENT:
2392 /* Write the PLT slot address into the GOT slot. */
2393 bfd_put_32 (output_bfd, relocation,
2394 htab->elf.sgot->contents +
2395 local_got_offsets[r_symndx]);
2396 relocation = (local_got_offsets[r_symndx] +
2397 htab->elf.sgot->output_offset);
2399 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2400 relocation += htab->elf.sgot->output_section->vma;
2406 /* The output section is needed later in
2407 finish_dynamic_section when creating the dynamic
2409 local_plt[r_symndx].sec = sec;
2413 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2417 bfd_boolean warned ATTRIBUTE_UNUSED;
2418 bfd_boolean ignored ATTRIBUTE_UNUSED;
2420 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2421 r_symndx, symtab_hdr, sym_hashes,
2423 unresolved_reloc, warned, ignored);
2426 if (sec != NULL && discarded_section (sec))
2427 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2428 rel, 1, relend, howto, 0, contents);
2430 if (info->relocatable)
2435 case R_390_GOTPLT12:
2436 case R_390_GOTPLT16:
2437 case R_390_GOTPLT20:
2438 case R_390_GOTPLT32:
2439 case R_390_GOTPLTENT:
2440 /* There are three cases for a GOTPLT relocation. 1) The
2441 relocation is against the jump slot entry of a plt that
2442 will get emitted to the output file. 2) The relocation
2443 is against the jump slot of a plt entry that has been
2444 removed. elf_s390_adjust_gotplt has created a GOT entry
2445 as replacement. 3) The relocation is against a local symbol.
2446 Cases 2) and 3) are the same as the GOT relocation code
2447 so we just have to test for case 1 and fall through for
2449 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2453 if (s390_is_ifunc_symbol_p (h))
2455 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2456 relocation = (plt_index * GOT_ENTRY_SIZE +
2457 htab->elf.igotplt->output_offset);
2458 if (r_type == R_390_GOTPLTENT)
2459 relocation += htab->elf.igotplt->output_section->vma;
2464 Current offset - size first entry / entry size. */
2465 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2468 /* Offset in GOT is PLT index plus GOT headers(3)
2469 times 4, addr & GOT addr. */
2470 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2471 if (r_type == R_390_GOTPLTENT)
2472 relocation += htab->elf.sgot->output_section->vma;
2474 unresolved_reloc = FALSE;
2484 /* Relocation is to the entry for this symbol in the global
2486 if (base_got == NULL)
2493 off = h->got.offset;
2494 dyn = htab->elf.dynamic_sections_created;
2496 if (s390_is_ifunc_symbol_p (h))
2498 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2499 if (off == (bfd_vma)-1)
2501 /* No explicit GOT usage so redirect to the
2503 base_got = htab->elf.igotplt;
2504 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2508 /* Explicit GOT slots must contain the address
2509 of the PLT slot. This will be handled in
2510 finish_dynamic_symbol. */
2513 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2515 && SYMBOL_REFERENCES_LOCAL (info, h))
2516 || (ELF_ST_VISIBILITY (h->other)
2517 && h->root.type == bfd_link_hash_undefweak))
2520 /* This is actually a static link, or it is a
2521 -Bsymbolic link and the symbol is defined
2522 locally, or the symbol was forced to be local
2523 because of a version file. We must initialize
2524 this entry in the global offset table. Since the
2525 offset must always be a multiple of 2, we use the
2526 least significant bit to record whether we have
2527 initialized it already.
2529 When doing a dynamic link, we create a .rel.got
2530 relocation entry to initialize the value. This
2531 is done in the finish_dynamic_symbol routine. */
2536 bfd_put_32 (output_bfd, relocation,
2537 base_got->contents + off);
2543 && SYMBOL_REFERENCES_LOCAL (info, h))
2544 /* lrl rx,sym@GOTENT -> larl rx, sym */
2545 && ((r_type == R_390_GOTENT
2546 && (bfd_get_16 (input_bfd,
2547 contents + rel->r_offset - 2)
2548 & 0xff0f) == 0xc40d)
2549 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2550 || (r_type == R_390_GOT20
2551 && (bfd_get_32 (input_bfd,
2552 contents + rel->r_offset - 2)
2553 & 0xff00f000) == 0xe300c000
2554 && bfd_get_8 (input_bfd,
2555 contents + rel->r_offset + 3) == 0x58)))
2557 unsigned short new_insn =
2558 (0xc000 | (bfd_get_8 (input_bfd,
2559 contents + rel->r_offset - 1) & 0xf0));
2560 bfd_put_16 (output_bfd, new_insn,
2561 contents + rel->r_offset - 2);
2562 r_type = R_390_PC32DBL;
2564 howto = elf_howto_table + r_type;
2565 relocation = h->root.u.def.value
2566 + h->root.u.def.section->output_section->vma
2567 + h->root.u.def.section->output_offset;
2572 unresolved_reloc = FALSE;
2576 if (local_got_offsets == NULL)
2579 off = local_got_offsets[r_symndx];
2581 /* The offset must always be a multiple of 4. We use
2582 the least significant bit to record whether we have
2583 already generated the necessary reloc. */
2588 bfd_put_32 (output_bfd, relocation,
2589 htab->elf.sgot->contents + off);
2594 Elf_Internal_Rela outrel;
2597 srelgot = htab->elf.srelgot;
2598 if (srelgot == NULL)
2601 outrel.r_offset = (htab->elf.sgot->output_section->vma
2602 + htab->elf.sgot->output_offset
2604 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2605 outrel.r_addend = relocation;
2606 loc = srelgot->contents;
2607 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2608 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2611 local_got_offsets[r_symndx] |= 1;
2615 if (off >= (bfd_vma) -2)
2618 relocation = base_got->output_offset + off;
2620 /* For @GOTENT the relocation is against the offset between
2621 the instruction and the symbols entry in the GOT and not
2622 between the start of the GOT and the symbols entry. We
2623 add the vma of the GOT to get the correct value. */
2624 if ( r_type == R_390_GOTENT
2625 || r_type == R_390_GOTPLTENT)
2626 relocation += base_got->output_section->vma;
2630 case R_390_GOTOFF16:
2631 case R_390_GOTOFF32:
2632 /* Relocation is relative to the start of the global offset
2635 /* Note that sgot->output_offset is not involved in this
2636 calculation. We always want the start of .got. If we
2637 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2638 permitted by the ABI, we might have to change this
2640 relocation -= htab->elf.sgot->output_section->vma;
2644 case R_390_GOTPCDBL:
2645 /* Use global offset table as symbol value. */
2646 relocation = htab->elf.sgot->output_section->vma;
2647 unresolved_reloc = FALSE;
2650 case R_390_PLT12DBL:
2651 case R_390_PLT16DBL:
2652 case R_390_PLT24DBL:
2653 case R_390_PLT32DBL:
2655 /* Relocation is to the entry for this symbol in the
2656 procedure linkage table. */
2658 /* Resolve a PLT32 reloc against a local symbol directly,
2659 without using the procedure linkage table. */
2663 if (h->plt.offset == (bfd_vma) -1
2664 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2666 /* We didn't make a PLT entry for this symbol. This
2667 happens when statically linking PIC code, or when
2668 using -Bsymbolic. */
2672 if (s390_is_ifunc_symbol_p (h))
2673 relocation = (htab->elf.iplt->output_section->vma
2674 + htab->elf.iplt->output_offset
2677 relocation = (htab->elf.splt->output_section->vma
2678 + htab->elf.splt->output_offset
2680 unresolved_reloc = FALSE;
2683 case R_390_PLTOFF16:
2684 case R_390_PLTOFF32:
2685 /* Relocation is to the entry for this symbol in the
2686 procedure linkage table relative to the start of the GOT. */
2688 /* For local symbols or if we didn't make a PLT entry for
2689 this symbol resolve the symbol directly. */
2691 || h->plt.offset == (bfd_vma) -1
2692 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2694 relocation -= htab->elf.sgot->output_section->vma;
2698 if (s390_is_ifunc_symbol_p (h))
2699 relocation = (htab->elf.iplt->output_section->vma
2700 + htab->elf.iplt->output_offset
2702 - htab->elf.sgot->output_section->vma);
2704 relocation = (htab->elf.splt->output_section->vma
2705 + htab->elf.splt->output_offset
2707 - htab->elf.sgot->output_section->vma);
2708 unresolved_reloc = FALSE;
2721 && s390_is_ifunc_symbol_p (h)
2724 if (!info->shared || !h->non_got_ref)
2726 /* For a non-shared object STT_GNU_IFUNC symbol must
2728 relocation = (htab->elf.iplt->output_section->vma
2729 + htab->elf.iplt->output_offset
2735 /* For shared objects a runtime relocation is needed. */
2737 Elf_Internal_Rela outrel;
2740 /* Need a dynamic relocation to get the real function
2742 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2746 if (outrel.r_offset == (bfd_vma) -1
2747 || outrel.r_offset == (bfd_vma) -2)
2750 outrel.r_offset += (input_section->output_section->vma
2751 + input_section->output_offset);
2753 if (h->dynindx == -1
2755 || info->executable)
2757 /* This symbol is resolved locally. */
2758 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2759 outrel.r_addend = (h->root.u.def.value
2760 + h->root.u.def.section->output_section->vma
2761 + h->root.u.def.section->output_offset);
2765 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2766 outrel.r_addend = 0;
2769 sreloc = htab->elf.irelifunc;
2770 elf_append_rela (output_bfd, sreloc, &outrel);
2772 /* If this reloc is against an external symbol, we
2773 do not want to fiddle with the addend. Otherwise,
2774 we need to include the symbol value so that it
2775 becomes an addend for the dynamic reloc. For an
2776 internal symbol, we have updated addend. */
2781 if ((input_section->flags & SEC_ALLOC) == 0)
2786 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2787 || h->root.type != bfd_link_hash_undefweak)
2788 && ((r_type != R_390_PC16
2789 && r_type != R_390_PC12DBL
2790 && r_type != R_390_PC16DBL
2791 && r_type != R_390_PC24DBL
2792 && r_type != R_390_PC32DBL
2793 && r_type != R_390_PC32)
2794 || !SYMBOL_CALLS_LOCAL (info, h)))
2795 || (ELIMINATE_COPY_RELOCS
2802 || h->root.type == bfd_link_hash_undefweak
2803 || h->root.type == bfd_link_hash_undefined)))
2805 Elf_Internal_Rela outrel;
2806 bfd_boolean skip, relocate;
2810 /* When generating a shared object, these relocations
2811 are copied into the output file to be resolved at run
2818 _bfd_elf_section_offset (output_bfd, info, input_section,
2820 if (outrel.r_offset == (bfd_vma) -1)
2822 else if (outrel.r_offset == (bfd_vma) -2)
2823 skip = TRUE, relocate = TRUE;
2824 outrel.r_offset += (input_section->output_section->vma
2825 + input_section->output_offset);
2828 memset (&outrel, 0, sizeof outrel);
2831 && (r_type == R_390_PC16
2832 || r_type == R_390_PC12DBL
2833 || r_type == R_390_PC16DBL
2834 || r_type == R_390_PC24DBL
2835 || r_type == R_390_PC32DBL
2836 || r_type == R_390_PC32
2838 || !SYMBOLIC_BIND (info, h)
2839 || !h->def_regular))
2841 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2842 outrel.r_addend = rel->r_addend;
2846 /* This symbol is local, or marked to become local. */
2847 outrel.r_addend = relocation + rel->r_addend;
2848 if (r_type == R_390_32)
2851 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2857 if (bfd_is_abs_section (sec))
2859 else if (sec == NULL || sec->owner == NULL)
2861 bfd_set_error(bfd_error_bad_value);
2868 osec = sec->output_section;
2869 sindx = elf_section_data (osec)->dynindx;
2872 osec = htab->elf.text_index_section;
2873 sindx = elf_section_data (osec)->dynindx;
2875 BFD_ASSERT (sindx != 0);
2877 /* We are turning this relocation into one
2878 against a section symbol, so subtract out
2879 the output section's address but not the
2880 offset of the input section in the output
2882 outrel.r_addend -= osec->vma;
2884 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2888 sreloc = elf_section_data (input_section)->sreloc;
2892 loc = sreloc->contents;
2893 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2894 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2896 /* If this reloc is against an external symbol, we do
2897 not want to fiddle with the addend. Otherwise, we
2898 need to include the symbol value so that it becomes
2899 an addend for the dynamic reloc. */
2905 /* Relocations for tls literal pool entries. */
2906 case R_390_TLS_IE32:
2909 Elf_Internal_Rela outrel;
2913 outrel.r_offset = rel->r_offset
2914 + input_section->output_section->vma
2915 + input_section->output_offset;
2916 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2917 sreloc = elf_section_data (input_section)->sreloc;
2920 loc = sreloc->contents;
2921 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2922 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2926 case R_390_TLS_GD32:
2927 case R_390_TLS_GOTIE32:
2928 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2929 tls_type = GOT_UNKNOWN;
2930 if (h == NULL && local_got_offsets)
2931 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2934 tls_type = elf_s390_hash_entry(h)->tls_type;
2935 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2936 r_type = R_390_TLS_LE32;
2938 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2939 r_type = R_390_TLS_IE32;
2941 if (r_type == R_390_TLS_LE32)
2943 /* This relocation gets optimized away by the local exec
2944 access optimization. */
2945 BFD_ASSERT (! unresolved_reloc);
2946 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2947 contents + rel->r_offset);
2951 if (htab->elf.sgot == NULL)
2955 off = h->got.offset;
2958 if (local_got_offsets == NULL)
2961 off = local_got_offsets[r_symndx];
2970 Elf_Internal_Rela outrel;
2974 if (htab->elf.srelgot == NULL)
2977 outrel.r_offset = (htab->elf.sgot->output_section->vma
2978 + htab->elf.sgot->output_offset + off);
2980 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2981 if (r_type == R_390_TLS_GD32)
2982 dr_type = R_390_TLS_DTPMOD;
2984 dr_type = R_390_TLS_TPOFF;
2985 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2986 outrel.r_addend = relocation - dtpoff_base (info);
2988 outrel.r_addend = 0;
2989 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2990 loc = htab->elf.srelgot->contents;
2991 loc += htab->elf.srelgot->reloc_count++
2992 * sizeof (Elf32_External_Rela);
2993 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2995 if (r_type == R_390_TLS_GD32)
2999 BFD_ASSERT (! unresolved_reloc);
3000 bfd_put_32 (output_bfd,
3001 relocation - dtpoff_base (info),
3002 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3006 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3007 outrel.r_offset += GOT_ENTRY_SIZE;
3008 outrel.r_addend = 0;
3009 htab->elf.srelgot->reloc_count++;
3010 loc += sizeof (Elf32_External_Rela);
3011 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3018 local_got_offsets[r_symndx] |= 1;
3021 if (off >= (bfd_vma) -2)
3023 if (r_type == ELF32_R_TYPE (rel->r_info))
3025 relocation = htab->elf.sgot->output_offset + off;
3026 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3027 relocation += htab->elf.sgot->output_section->vma;
3028 unresolved_reloc = FALSE;
3032 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3033 contents + rel->r_offset);
3038 case R_390_TLS_GOTIE12:
3039 case R_390_TLS_GOTIE20:
3040 case R_390_TLS_IEENT:
3043 if (local_got_offsets == NULL)
3045 off = local_got_offsets[r_symndx];
3047 goto emit_tls_relocs;
3051 off = h->got.offset;
3052 tls_type = elf_s390_hash_entry(h)->tls_type;
3053 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3054 goto emit_tls_relocs;
3057 if (htab->elf.sgot == NULL)
3060 BFD_ASSERT (! unresolved_reloc);
3061 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3062 htab->elf.sgot->contents + off);
3063 relocation = htab->elf.sgot->output_offset + off;
3064 if (r_type == R_390_TLS_IEENT)
3065 relocation += htab->elf.sgot->output_section->vma;
3066 unresolved_reloc = FALSE;
3069 case R_390_TLS_LDM32:
3071 /* The literal pool entry this relocation refers to gets ignored
3072 by the optimized code of the local exec model. Do nothing
3073 and the value will turn out zero. */
3076 if (htab->elf.sgot == NULL)
3079 off = htab->tls_ldm_got.offset;
3084 Elf_Internal_Rela outrel;
3087 if (htab->elf.srelgot == NULL)
3090 outrel.r_offset = (htab->elf.sgot->output_section->vma
3091 + htab->elf.sgot->output_offset + off);
3093 bfd_put_32 (output_bfd, 0,
3094 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3095 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3096 outrel.r_addend = 0;
3097 loc = htab->elf.srelgot->contents;
3098 loc += htab->elf.srelgot->reloc_count++
3099 * sizeof (Elf32_External_Rela);
3100 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3101 htab->tls_ldm_got.offset |= 1;
3103 relocation = htab->elf.sgot->output_offset + off;
3104 unresolved_reloc = FALSE;
3107 case R_390_TLS_LE32:
3110 /* Linking a shared library with non-fpic code requires
3111 a R_390_TLS_TPOFF relocation. */
3112 Elf_Internal_Rela outrel;
3117 outrel.r_offset = rel->r_offset
3118 + input_section->output_section->vma
3119 + input_section->output_offset;
3120 if (h != NULL && h->dynindx != -1)
3124 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3126 outrel.r_addend = relocation - dtpoff_base (info);
3128 outrel.r_addend = 0;
3129 sreloc = elf_section_data (input_section)->sreloc;
3132 loc = sreloc->contents;
3133 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3134 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3138 BFD_ASSERT (! unresolved_reloc);
3139 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3140 contents + rel->r_offset);
3144 case R_390_TLS_LDO32:
3145 if (info->shared || (input_section->flags & SEC_DEBUGGING))
3146 relocation -= dtpoff_base (info);
3148 /* When converting LDO to LE, we must negate. */
3149 relocation = -tpoff (info, relocation);
3152 /* Relocations for tls instructions. */
3153 case R_390_TLS_LOAD:
3154 case R_390_TLS_GDCALL:
3155 case R_390_TLS_LDCALL:
3156 tls_type = GOT_UNKNOWN;
3157 if (h == NULL && local_got_offsets)
3158 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3160 tls_type = elf_s390_hash_entry(h)->tls_type;
3162 if (tls_type == GOT_TLS_GD)
3165 if (r_type == R_390_TLS_LOAD)
3167 if (!info->shared && (h == NULL || h->dynindx == -1))
3169 /* IE->LE transition. Four valid cases:
3170 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3171 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3172 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3173 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3174 unsigned int insn, ry;
3176 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3178 if ((insn & 0xff00f000) == 0x58000000)
3179 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3180 ry = (insn & 0x000f0000);
3181 else if ((insn & 0xff0f0000) == 0x58000000)
3182 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3183 ry = (insn & 0x0000f000) << 4;
3184 else if ((insn & 0xff00f000) == 0x5800c000)
3185 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3186 ry = (insn & 0x000f0000);
3187 else if ((insn & 0xff0f0000) == 0x580c0000)
3188 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3189 ry = (insn & 0x0000f000) << 4;
3191 invalid_tls_insn (input_bfd, input_section, rel);
3192 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3193 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3196 else if (r_type == R_390_TLS_GDCALL)
3200 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3201 if ((insn & 0xff000fff) != 0x4d000000 &&
3202 (insn & 0xffff0000) != 0xc0e50000 &&
3203 (insn & 0xff000000) != 0x0d000000)
3204 invalid_tls_insn (input_bfd, input_section, rel);
3205 if (!info->shared && (h == NULL || h->dynindx == -1))
3207 if ((insn & 0xff000000) == 0x0d000000)
3209 /* GD->LE transition.
3210 basr rx, ry -> nopr r7 */
3211 insn = 0x07070000 | (insn & 0xffff);
3213 else if ((insn & 0xff000000) == 0x4d000000)
3215 /* GD->LE transition.
3216 bas %r14,0(%rx,%r13) -> bc 0,0 */
3221 /* GD->LE transition.
3222 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3224 bfd_put_16 (output_bfd, 0x0000,
3225 contents + rel->r_offset + 4);
3230 /* If basr is used in the pic case to invoke
3231 _tls_get_offset, something went wrong before. */
3232 if ((insn & 0xff000000) == 0x0d000000)
3233 invalid_tls_insn (input_bfd, input_section, rel);
3235 if ((insn & 0xff000000) == 0x4d000000)
3237 /* GD->IE transition.
3238 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3243 /* GD->IE transition.
3244 brasl %r14,__tls_get_addr@plt ->
3245 l %r2,0(%r2,%r12) ; bcr 0,0 */
3247 bfd_put_16 (output_bfd, 0x0700,
3248 contents + rel->r_offset + 4);
3251 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3253 else if (r_type == R_390_TLS_LDCALL)
3259 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3260 if ((insn & 0xff000fff) != 0x4d000000 &&
3261 (insn & 0xffff0000) != 0xc0e50000 &&
3262 (insn & 0xff000000) != 0x0d000000)
3263 invalid_tls_insn (input_bfd, input_section, rel);
3265 if ((insn & 0xff000000) == 0x0d000000)
3267 /* LD->LE transition.
3268 basr rx, ry -> nopr r7 */
3269 insn = 0x07070000 | (insn & 0xffff);
3271 else if ((insn & 0xff000000) == 0x4d000000)
3273 /* LD->LE transition.
3274 bas %r14,0(%rx,%r13) -> bc 0,0 */
3279 /* LD->LE transition.
3280 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3282 bfd_put_16 (output_bfd, 0x0000,
3283 contents + rel->r_offset + 4);
3285 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3294 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3295 because such sections are not SEC_ALLOC and thus ld.so will
3296 not process them. */
3297 if (unresolved_reloc
3298 && !((input_section->flags & SEC_DEBUGGING) != 0
3300 && _bfd_elf_section_offset (output_bfd, info, input_section,
3301 rel->r_offset) != (bfd_vma) -1)
3302 (*_bfd_error_handler)
3303 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3306 (long) rel->r_offset,
3308 h->root.root.string);
3312 /* When applying a 24 bit reloc we need to start one byte
3313 earlier. Otherwise the 32 bit get/put bfd operations might
3314 access a byte after the actual section. */
3315 if (r_type == R_390_PC24DBL
3316 || r_type == R_390_PLT24DBL)
3319 if (r_type == R_390_20
3320 || r_type == R_390_GOT20
3321 || r_type == R_390_GOTPLT20
3322 || r_type == R_390_TLS_GOTIE20)
3324 relocation += rel->r_addend;
3325 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3326 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3327 contents, rel->r_offset,
3331 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3332 contents, rel->r_offset,
3333 relocation, rel->r_addend);
3335 if (r != bfd_reloc_ok)
3340 name = h->root.root.string;
3343 name = bfd_elf_string_from_elf_section (input_bfd,
3344 symtab_hdr->sh_link,
3349 name = bfd_section_name (input_bfd, sec);
3352 if (r == bfd_reloc_overflow)
3355 if (! ((*info->callbacks->reloc_overflow)
3356 (info, (h ? &h->root : NULL), name, howto->name,
3357 (bfd_vma) 0, input_bfd, input_section,
3363 (*_bfd_error_handler)
3364 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3365 input_bfd, input_section,
3366 (long) rel->r_offset, name, (int) r);
3375 /* Generate the PLT slots together with the dynamic relocations needed
3376 for IFUNC symbols. */
3379 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3380 struct bfd_link_info *info,
3381 struct elf_link_hash_entry *h,
3382 struct elf_s390_link_hash_table *htab,
3383 bfd_vma iplt_offset,
3384 bfd_vma resolver_address)
3388 bfd_vma igotiplt_offset;
3389 Elf_Internal_Rela rela;
3391 asection *plt, *gotplt, *relplt;
3392 bfd_vma relative_offset;
3394 if (htab->elf.iplt == NULL
3395 || htab->elf.igotplt == NULL
3396 || htab->elf.irelplt == NULL)
3399 gotplt = htab->elf.igotplt;
3400 relplt = htab->elf.irelplt;
3402 /* Index of the PLT slot within iplt section. */
3403 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3404 plt = htab->elf.iplt;
3405 /* Offset into the igot.plt section. */
3406 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3407 /* Offset into the got section. */
3408 got_offset = igotiplt_offset + gotplt->output_offset;
3410 /* S390 uses halfwords for relative branch calc! */
3411 relative_offset = - (plt->output_offset +
3412 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3413 /* If offset is > 32768, branch to a previous branch
3414 390 can only handle +-64 K jumps. */
3415 if ( -32768 > (int) relative_offset )
3417 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3419 /* Fill in the entry in the procedure linkage table. */
3422 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3425 /* Adjust jump to the first plt entry. */
3426 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3427 plt->contents + iplt_offset + 20);
3429 /* Push the GOT offset field. */
3430 bfd_put_32 (output_bfd,
3431 (gotplt->output_section->vma
3433 plt->contents + iplt_offset + 24);
3435 else if (got_offset < 4096)
3437 /* The GOT offset is small enough to be used directly as
3439 memcpy (plt->contents + iplt_offset,
3440 elf_s390_plt_pic12_entry,
3443 /* Put in the GOT offset as displacement value. The 0xc000
3444 value comes from the first word of the plt entry. Look
3445 at the elf_s390_plt_pic16_entry content. */
3446 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3447 plt->contents + iplt_offset + 2);
3449 /* Adjust the jump to the first plt entry. */
3450 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3451 plt->contents + iplt_offset + 20);
3453 else if (got_offset < 32768)
3455 /* The GOT offset is too big for a displacement but small
3456 enough to be a signed 16 bit immediate value as it can be
3457 used in an lhi instruction. */
3458 memcpy (plt->contents + iplt_offset,
3459 elf_s390_plt_pic16_entry,
3462 /* Put in the GOT offset for the lhi instruction. */
3463 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3464 plt->contents + iplt_offset + 2);
3466 /* Adjust the jump to the first plt entry. */
3467 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3468 plt->contents + iplt_offset + 20);
3472 memcpy (plt->contents + iplt_offset,
3473 elf_s390_plt_pic_entry,
3476 /* Adjust the jump to the first plt entry. */
3477 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3478 plt->contents + iplt_offset + 20);
3480 /* Push the GOT offset field. */
3481 bfd_put_32 (output_bfd, got_offset,
3482 plt->contents + iplt_offset + 24);
3484 /* Insert offset into reloc. table here. */
3485 bfd_put_32 (output_bfd, relplt->output_offset +
3486 iplt_index * RELA_ENTRY_SIZE,
3487 plt->contents + iplt_offset + 28);
3489 /* Fill in the entry in the global offset table.
3490 Points to instruction after GOT offset. */
3491 bfd_put_32 (output_bfd,
3492 (plt->output_section->vma
3493 + plt->output_offset
3496 gotplt->contents + igotiplt_offset);
3498 /* Fill in the entry in the .rela.plt section. */
3499 rela.r_offset = gotplt->output_section->vma + got_offset;
3503 || ((info->executable
3504 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3507 /* The symbol can be locally resolved. */
3508 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3509 rela.r_addend = resolver_address;
3513 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3517 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3518 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3521 /* Finish up dynamic symbol handling. We set the contents of various
3522 dynamic sections here. */
3525 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3526 struct bfd_link_info *info,
3527 struct elf_link_hash_entry *h,
3528 Elf_Internal_Sym *sym)
3530 struct elf_s390_link_hash_table *htab;
3531 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3533 htab = elf_s390_hash_table (info);
3535 if (h->plt.offset != (bfd_vma) -1)
3539 Elf_Internal_Rela rela;
3541 bfd_vma relative_offset;
3543 /* This symbol has an entry in the procedure linkage table. Set
3545 if (s390_is_ifunc_symbol_p (h))
3547 /* If we can resolve the IFUNC symbol locally we generate an
3549 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3550 eh->ifunc_resolver_address +
3551 eh->ifunc_resolver_section->output_offset +
3552 eh->ifunc_resolver_section->output_section->vma);
3553 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3554 symbols is below. */
3558 if (h->dynindx == -1
3559 || htab->elf.splt == NULL
3560 || htab->elf.sgotplt == NULL
3561 || htab->elf.srelplt == NULL)
3565 Current offset - size first entry / entry size. */
3566 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3568 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3570 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3572 /* S390 uses halfwords for relative branch calc! */
3573 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3574 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3575 /* If offset is > 32768, branch to a previous branch
3576 390 can only handle +-64 K jumps. */
3577 if ( -32768 > (int) relative_offset )
3579 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3581 /* Fill in the entry in the procedure linkage table. */
3584 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3587 /* Adjust jump to the first plt entry. */
3588 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3589 htab->elf.splt->contents + h->plt.offset + 20);
3591 /* Push the GOT offset field. */
3592 bfd_put_32 (output_bfd,
3593 (htab->elf.sgotplt->output_section->vma
3594 + htab->elf.sgotplt->output_offset
3596 htab->elf.splt->contents + h->plt.offset + 24);
3598 else if (got_offset < 4096)
3600 /* The GOT offset is small enough to be used directly as
3602 memcpy (htab->elf.splt->contents + h->plt.offset,
3603 elf_s390_plt_pic12_entry,
3606 /* Put in the GOT offset as displacement value. The 0xc000
3607 value comes from the first word of the plt entry. Look
3608 at the elf_s390_plt_pic16_entry content. */
3609 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3610 htab->elf.splt->contents + h->plt.offset + 2);
3612 /* Adjust the jump to the first plt entry. */
3613 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3614 htab->elf.splt->contents + h->plt.offset + 20);
3616 else if (got_offset < 32768)
3618 /* The GOT offset is too big for a displacement but small
3619 enough to be a signed 16 bit immediate value as it can be
3620 used in an lhi instruction. */
3621 memcpy (htab->elf.splt->contents + h->plt.offset,
3622 elf_s390_plt_pic16_entry,
3625 /* Put in the GOT offset for the lhi instruction. */
3626 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3627 htab->elf.splt->contents + h->plt.offset + 2);
3629 /* Adjust the jump to the first plt entry. */
3630 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3631 htab->elf.splt->contents + h->plt.offset + 20);
3635 memcpy (htab->elf.splt->contents + h->plt.offset,
3636 elf_s390_plt_pic_entry,
3639 /* Adjust the jump to the first plt entry. */
3640 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3641 htab->elf.splt->contents + h->plt.offset + 20);
3643 /* Push the GOT offset field. */
3644 bfd_put_32 (output_bfd, got_offset,
3645 htab->elf.splt->contents + h->plt.offset + 24);
3647 /* Insert offset into reloc. table here. */
3648 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3649 htab->elf.splt->contents + h->plt.offset + 28);
3651 /* Fill in the entry in the global offset table.
3652 Points to instruction after GOT offset. */
3653 bfd_put_32 (output_bfd,
3654 (htab->elf.splt->output_section->vma
3655 + htab->elf.splt->output_offset
3658 htab->elf.sgotplt->contents + got_offset);
3660 /* Fill in the entry in the .rela.plt section. */
3661 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3662 + htab->elf.sgotplt->output_offset
3664 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3666 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3667 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3669 if (!h->def_regular)
3671 /* Mark the symbol as undefined, rather than as defined in
3672 the .plt section. Leave the value alone. This is a clue
3673 for the dynamic linker, to make function pointer
3674 comparisons work between an application and shared
3676 sym->st_shndx = SHN_UNDEF;
3681 if (h->got.offset != (bfd_vma) -1
3682 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3683 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3684 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3686 Elf_Internal_Rela rela;
3689 /* This symbol has an entry in the global offset table. Set it
3692 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3695 rela.r_offset = (htab->elf.sgot->output_section->vma
3696 + htab->elf.sgot->output_offset
3697 + (h->got.offset &~ (bfd_vma) 1));
3699 /* If this is a static link, or it is a -Bsymbolic link and the
3700 symbol is defined locally or was forced to be local because
3701 of a version file, we just want to emit a RELATIVE reloc.
3702 The entry in the global offset table will already have been
3703 initialized in the relocate_section function. */
3704 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3708 /* An explicit GOT slot usage needs GLOB_DAT. If the
3709 symbol references local the implicit got.iplt slot
3710 will be used and the IRELATIVE reloc has been created
3716 /* For non-shared objects explicit GOT slots must be
3717 filled with the PLT slot address for pointer
3718 equality reasons. */
3719 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3720 + htab->elf.iplt->output_offset
3722 htab->elf.sgot->contents + h->got.offset);
3726 else if (info->shared
3727 && SYMBOL_REFERENCES_LOCAL (info, h))
3729 /* If this is a static link, or it is a -Bsymbolic link and
3730 the symbol is defined locally or was forced to be local
3731 because of a version file, we just want to emit a
3732 RELATIVE reloc. The entry in the global offset table
3733 will already have been initialized in the
3734 relocate_section function. */
3735 if (!h->def_regular)
3737 BFD_ASSERT((h->got.offset & 1) != 0);
3738 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3739 rela.r_addend = (h->root.u.def.value
3740 + h->root.u.def.section->output_section->vma
3741 + h->root.u.def.section->output_offset);
3745 BFD_ASSERT((h->got.offset & 1) == 0);
3747 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3748 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3752 loc = htab->elf.srelgot->contents;
3753 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3754 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3759 Elf_Internal_Rela rela;
3762 /* This symbols needs a copy reloc. Set it up. */
3764 if (h->dynindx == -1
3765 || (h->root.type != bfd_link_hash_defined
3766 && h->root.type != bfd_link_hash_defweak)
3767 || htab->srelbss == NULL)
3770 rela.r_offset = (h->root.u.def.value
3771 + h->root.u.def.section->output_section->vma
3772 + h->root.u.def.section->output_offset);
3773 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3775 loc = htab->srelbss->contents;
3776 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3777 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3780 /* Mark some specially defined symbols as absolute. */
3781 if (h == htab->elf.hdynamic
3782 || h == htab->elf.hgot
3783 || h == htab->elf.hplt)
3784 sym->st_shndx = SHN_ABS;
3789 /* Used to decide how to sort relocs in an optimal manner for the
3790 dynamic linker, before writing them out. */
3792 static enum elf_reloc_type_class
3793 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3794 const asection *rel_sec ATTRIBUTE_UNUSED,
3795 const Elf_Internal_Rela *rela)
3797 switch ((int) ELF32_R_TYPE (rela->r_info))
3799 case R_390_RELATIVE:
3800 return reloc_class_relative;
3801 case R_390_JMP_SLOT:
3802 return reloc_class_plt;
3804 return reloc_class_copy;
3806 return reloc_class_normal;
3810 /* Finish up the dynamic sections. */
3813 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3814 struct bfd_link_info *info)
3816 struct elf_s390_link_hash_table *htab;
3822 htab = elf_s390_hash_table (info);
3823 dynobj = htab->elf.dynobj;
3824 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3826 if (htab->elf.dynamic_sections_created)
3828 Elf32_External_Dyn *dyncon, *dynconend;
3830 if (sdyn == NULL || htab->elf.sgot == NULL)
3833 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3834 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3835 for (; dyncon < dynconend; dyncon++)
3837 Elf_Internal_Dyn dyn;
3840 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3848 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3852 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3856 s = htab->elf.srelplt->output_section;
3857 dyn.d_un.d_val = s->size;
3861 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3864 /* Fill in the special first entry in the procedure linkage table. */
3865 if (htab->elf.splt && htab->elf.splt->size > 0)
3867 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3870 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3871 PLT_FIRST_ENTRY_SIZE);
3875 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3876 PLT_FIRST_ENTRY_SIZE);
3877 bfd_put_32 (output_bfd,
3878 htab->elf.sgotplt->output_section->vma
3879 + htab->elf.sgotplt->output_offset,
3880 htab->elf.splt->contents + 24);
3882 elf_section_data (htab->elf.splt->output_section)
3883 ->this_hdr.sh_entsize = 4;
3888 if (htab->elf.sgotplt)
3890 /* Fill in the first three entries in the global offset table. */
3891 if (htab->elf.sgotplt->size > 0)
3893 bfd_put_32 (output_bfd,
3894 (sdyn == NULL ? (bfd_vma) 0
3895 : sdyn->output_section->vma + sdyn->output_offset),
3896 htab->elf.sgotplt->contents);
3897 /* One entry for shared object struct ptr. */
3898 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3899 /* One entry for _dl_runtime_resolve. */
3900 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3903 elf_section_data (htab->elf.sgotplt->output_section)
3904 ->this_hdr.sh_entsize = 4;
3906 /* Finish dynamic symbol for local IFUNC symbols. */
3907 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3909 struct plt_entry *local_plt;
3910 Elf_Internal_Sym *isym;
3911 Elf_Internal_Shdr *symtab_hdr;
3913 symtab_hdr = &elf_symtab_hdr (ibfd);
3915 local_plt = elf_s390_local_plt (ibfd);
3916 if (local_plt != NULL)
3917 for (i = 0; i < symtab_hdr->sh_info; i++)
3919 if (local_plt[i].plt.offset != (bfd_vma) -1)
3921 asection *sec = local_plt[i].sec;
3922 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3926 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3927 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3928 local_plt[i].plt.offset,
3930 + sec->output_section->vma
3931 + sec->output_offset);
3940 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3945 switch (note->descsz)
3950 case 224: /* S/390 Linux. */
3952 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3955 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3963 /* Make a ".reg/999" section. */
3964 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3965 size, note->descpos + offset);
3968 /* Return address for Ith PLT stub in section PLT, for relocation REL
3969 or (bfd_vma) -1 if it should not be included. */
3972 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3973 const arelent *rel ATTRIBUTE_UNUSED)
3975 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3979 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3981 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3986 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3987 #define TARGET_BIG_NAME "elf32-s390"
3988 #define ELF_ARCH bfd_arch_s390
3989 #define ELF_TARGET_ID S390_ELF_DATA
3990 #define ELF_MACHINE_CODE EM_S390
3991 #define ELF_MACHINE_ALT1 EM_S390_OLD
3992 #define ELF_MAXPAGESIZE 0x1000
3994 #define elf_backend_can_gc_sections 1
3995 #define elf_backend_can_refcount 1
3996 #define elf_backend_want_got_plt 1
3997 #define elf_backend_plt_readonly 1
3998 #define elf_backend_want_plt_sym 0
3999 #define elf_backend_got_header_size 12
4000 #define elf_backend_rela_normal 1
4002 #define elf_info_to_howto elf_s390_info_to_howto
4004 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4005 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4006 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4007 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4009 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4011 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4012 #define elf_backend_check_relocs elf_s390_check_relocs
4013 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4014 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4015 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4016 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4017 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4018 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4019 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4020 #define elf_backend_relocate_section elf_s390_relocate_section
4021 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4022 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4023 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4024 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4025 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4027 #define bfd_elf32_mkobject elf_s390_mkobject
4028 #define elf_backend_object_p elf_s390_object_p
4030 #include "elf32-target.h"