1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
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
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 struct elf_s390_link_hash_entry;
50 static void elf_s390_adjust_gotplt
51 PARAMS ((struct elf_s390_link_hash_entry *));
52 static bfd_boolean elf_s390_adjust_dynamic_symbol
53 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
54 static bfd_boolean allocate_dynrelocs
55 PARAMS ((struct elf_link_hash_entry *, PTR));
56 static bfd_boolean readonly_dynrelocs
57 PARAMS ((struct elf_link_hash_entry *, PTR));
58 static bfd_boolean elf_s390_size_dynamic_sections
59 PARAMS ((bfd *, struct bfd_link_info *));
60 static bfd_boolean elf_s390_relocate_section
61 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
63 static bfd_boolean elf_s390_finish_dynamic_symbol
64 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
66 static enum elf_reloc_type_class elf_s390_reloc_type_class
67 PARAMS ((const Elf_Internal_Rela *));
68 static bfd_boolean elf_s390_finish_dynamic_sections
69 PARAMS ((bfd *, struct bfd_link_info *));
70 static bfd_boolean elf_s390_object_p
72 static int elf_s390_tls_transition
73 PARAMS ((struct bfd_link_info *, int, int));
74 static bfd_reloc_status_type s390_tls_reloc
75 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
76 static bfd_vma dtpoff_base
77 PARAMS ((struct bfd_link_info *));
79 PARAMS ((struct bfd_link_info *, bfd_vma));
80 static void invalid_tls_insn
81 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
82 static bfd_reloc_status_type s390_elf_ldisp_reloc
83 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
87 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
88 from smaller values. Start with zero, widen, *then* decrement. */
89 #define MINUS_ONE (((bfd_vma)0) - 1)
91 /* The relocation "howto" table. */
92 static reloc_howto_type elf_howto_table[] =
94 HOWTO (R_390_NONE, /* type */
96 0, /* size (0 = byte, 1 = short, 2 = long) */
98 FALSE, /* pc_relative */
100 complain_overflow_dont, /* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_390_NONE", /* name */
103 FALSE, /* partial_inplace */
106 FALSE), /* pcrel_offset */
108 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
110 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
111 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
112 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
114 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
116 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
118 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
120 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
122 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
124 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
126 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
128 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
130 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
132 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
134 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
136 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
138 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
140 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
142 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
144 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
146 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
148 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
150 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
152 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
154 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
156 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
158 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
160 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
162 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
164 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
165 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
166 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
168 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
170 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
172 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
174 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
176 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
178 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
180 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
181 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
182 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
183 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
184 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
185 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
186 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
187 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
188 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
189 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
190 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
191 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
192 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
193 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
194 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
195 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
196 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
197 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
198 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
199 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
200 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
202 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
203 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
204 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
205 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
206 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
207 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
208 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
210 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
212 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
213 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
214 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
215 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
216 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
217 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
218 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
219 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
220 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
221 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
224 /* GNU extension to record C++ vtable hierarchy. */
225 static reloc_howto_type elf64_s390_vtinherit_howto =
226 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
227 static reloc_howto_type elf64_s390_vtentry_howto =
228 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
230 static reloc_howto_type *
231 elf_s390_reloc_type_lookup (abfd, code)
232 bfd *abfd ATTRIBUTE_UNUSED;
233 bfd_reloc_code_real_type code;
238 return &elf_howto_table[(int) R_390_NONE];
240 return &elf_howto_table[(int) R_390_8];
241 case BFD_RELOC_390_12:
242 return &elf_howto_table[(int) R_390_12];
244 return &elf_howto_table[(int) R_390_16];
246 return &elf_howto_table[(int) R_390_32];
248 return &elf_howto_table[(int) R_390_32];
249 case BFD_RELOC_32_PCREL:
250 return &elf_howto_table[(int) R_390_PC32];
251 case BFD_RELOC_390_GOT12:
252 return &elf_howto_table[(int) R_390_GOT12];
253 case BFD_RELOC_32_GOT_PCREL:
254 return &elf_howto_table[(int) R_390_GOT32];
255 case BFD_RELOC_390_PLT32:
256 return &elf_howto_table[(int) R_390_PLT32];
257 case BFD_RELOC_390_COPY:
258 return &elf_howto_table[(int) R_390_COPY];
259 case BFD_RELOC_390_GLOB_DAT:
260 return &elf_howto_table[(int) R_390_GLOB_DAT];
261 case BFD_RELOC_390_JMP_SLOT:
262 return &elf_howto_table[(int) R_390_JMP_SLOT];
263 case BFD_RELOC_390_RELATIVE:
264 return &elf_howto_table[(int) R_390_RELATIVE];
265 case BFD_RELOC_32_GOTOFF:
266 return &elf_howto_table[(int) R_390_GOTOFF32];
267 case BFD_RELOC_390_GOTPC:
268 return &elf_howto_table[(int) R_390_GOTPC];
269 case BFD_RELOC_390_GOT16:
270 return &elf_howto_table[(int) R_390_GOT16];
271 case BFD_RELOC_16_PCREL:
272 return &elf_howto_table[(int) R_390_PC16];
273 case BFD_RELOC_390_PC16DBL:
274 return &elf_howto_table[(int) R_390_PC16DBL];
275 case BFD_RELOC_390_PLT16DBL:
276 return &elf_howto_table[(int) R_390_PLT16DBL];
277 case BFD_RELOC_390_PC32DBL:
278 return &elf_howto_table[(int) R_390_PC32DBL];
279 case BFD_RELOC_390_PLT32DBL:
280 return &elf_howto_table[(int) R_390_PLT32DBL];
281 case BFD_RELOC_390_GOTPCDBL:
282 return &elf_howto_table[(int) R_390_GOTPCDBL];
284 return &elf_howto_table[(int) R_390_64];
285 case BFD_RELOC_64_PCREL:
286 return &elf_howto_table[(int) R_390_PC64];
287 case BFD_RELOC_390_GOT64:
288 return &elf_howto_table[(int) R_390_GOT64];
289 case BFD_RELOC_390_PLT64:
290 return &elf_howto_table[(int) R_390_PLT64];
291 case BFD_RELOC_390_GOTENT:
292 return &elf_howto_table[(int) R_390_GOTENT];
293 case BFD_RELOC_16_GOTOFF:
294 return &elf_howto_table[(int) R_390_GOTOFF16];
295 case BFD_RELOC_390_GOTOFF64:
296 return &elf_howto_table[(int) R_390_GOTOFF64];
297 case BFD_RELOC_390_GOTPLT12:
298 return &elf_howto_table[(int) R_390_GOTPLT12];
299 case BFD_RELOC_390_GOTPLT16:
300 return &elf_howto_table[(int) R_390_GOTPLT16];
301 case BFD_RELOC_390_GOTPLT32:
302 return &elf_howto_table[(int) R_390_GOTPLT32];
303 case BFD_RELOC_390_GOTPLT64:
304 return &elf_howto_table[(int) R_390_GOTPLT64];
305 case BFD_RELOC_390_GOTPLTENT:
306 return &elf_howto_table[(int) R_390_GOTPLTENT];
307 case BFD_RELOC_390_PLTOFF16:
308 return &elf_howto_table[(int) R_390_PLTOFF16];
309 case BFD_RELOC_390_PLTOFF32:
310 return &elf_howto_table[(int) R_390_PLTOFF32];
311 case BFD_RELOC_390_PLTOFF64:
312 return &elf_howto_table[(int) R_390_PLTOFF64];
313 case BFD_RELOC_390_TLS_LOAD:
314 return &elf_howto_table[(int) R_390_TLS_LOAD];
315 case BFD_RELOC_390_TLS_GDCALL:
316 return &elf_howto_table[(int) R_390_TLS_GDCALL];
317 case BFD_RELOC_390_TLS_LDCALL:
318 return &elf_howto_table[(int) R_390_TLS_LDCALL];
319 case BFD_RELOC_390_TLS_GD64:
320 return &elf_howto_table[(int) R_390_TLS_GD64];
321 case BFD_RELOC_390_TLS_GOTIE12:
322 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
323 case BFD_RELOC_390_TLS_GOTIE64:
324 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
325 case BFD_RELOC_390_TLS_LDM64:
326 return &elf_howto_table[(int) R_390_TLS_LDM64];
327 case BFD_RELOC_390_TLS_IE64:
328 return &elf_howto_table[(int) R_390_TLS_IE64];
329 case BFD_RELOC_390_TLS_IEENT:
330 return &elf_howto_table[(int) R_390_TLS_IEENT];
331 case BFD_RELOC_390_TLS_LE64:
332 return &elf_howto_table[(int) R_390_TLS_LE64];
333 case BFD_RELOC_390_TLS_LDO64:
334 return &elf_howto_table[(int) R_390_TLS_LDO64];
335 case BFD_RELOC_390_TLS_DTPMOD:
336 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
337 case BFD_RELOC_390_TLS_DTPOFF:
338 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
339 case BFD_RELOC_390_TLS_TPOFF:
340 return &elf_howto_table[(int) R_390_TLS_TPOFF];
341 case BFD_RELOC_390_20:
342 return &elf_howto_table[(int) R_390_20];
343 case BFD_RELOC_390_GOT20:
344 return &elf_howto_table[(int) R_390_GOT20];
345 case BFD_RELOC_390_GOTPLT20:
346 return &elf_howto_table[(int) R_390_GOTPLT20];
347 case BFD_RELOC_390_TLS_GOTIE20:
348 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
349 case BFD_RELOC_VTABLE_INHERIT:
350 return &elf64_s390_vtinherit_howto;
351 case BFD_RELOC_VTABLE_ENTRY:
352 return &elf64_s390_vtentry_howto;
359 static reloc_howto_type *
360 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
366 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
368 if (elf_howto_table[i].name != NULL
369 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
370 return &elf_howto_table[i];
372 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
373 return &elf64_s390_vtinherit_howto;
374 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
375 return &elf64_s390_vtentry_howto;
380 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
381 and elf64-s390.c has its own copy. */
384 elf_s390_info_to_howto (abfd, cache_ptr, dst)
385 bfd *abfd ATTRIBUTE_UNUSED;
387 Elf_Internal_Rela *dst;
389 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
392 case R_390_GNU_VTINHERIT:
393 cache_ptr->howto = &elf64_s390_vtinherit_howto;
396 case R_390_GNU_VTENTRY:
397 cache_ptr->howto = &elf64_s390_vtentry_howto;
401 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
403 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
407 cache_ptr->howto = &elf_howto_table[r_type];
411 /* A relocation function which doesn't do anything. */
412 static bfd_reloc_status_type
413 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
414 output_bfd, error_message)
415 bfd *abfd ATTRIBUTE_UNUSED;
416 arelent *reloc_entry;
417 asymbol *symbol ATTRIBUTE_UNUSED;
418 PTR data ATTRIBUTE_UNUSED;
419 asection *input_section;
421 char **error_message ATTRIBUTE_UNUSED;
424 reloc_entry->address += input_section->output_offset;
428 /* Handle the large displacement relocs. */
429 static bfd_reloc_status_type
430 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
431 output_bfd, error_message)
433 arelent *reloc_entry;
436 asection *input_section;
438 char **error_message ATTRIBUTE_UNUSED;
440 reloc_howto_type *howto = reloc_entry->howto;
444 if (output_bfd != (bfd *) NULL
445 && (symbol->flags & BSF_SECTION_SYM) == 0
446 && (! howto->partial_inplace
447 || reloc_entry->addend == 0))
449 reloc_entry->address += input_section->output_offset;
452 if (output_bfd != NULL)
453 return bfd_reloc_continue;
455 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
456 return bfd_reloc_outofrange;
458 relocation = (symbol->value
459 + symbol->section->output_section->vma
460 + symbol->section->output_offset);
461 relocation += reloc_entry->addend;
462 if (howto->pc_relative)
464 relocation -= (input_section->output_section->vma
465 + input_section->output_offset);
466 relocation -= reloc_entry->address;
469 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
470 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
471 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
473 if ((bfd_signed_vma) relocation < - 0x80000
474 || (bfd_signed_vma) relocation > 0x7ffff)
475 return bfd_reloc_overflow;
481 elf_s390_is_local_label_name (abfd, name)
485 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
488 return _bfd_elf_is_local_label_name (abfd, name);
491 /* Functions for the 390 ELF linker. */
493 /* The name of the dynamic interpreter. This is put in the .interp
496 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
498 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
499 copying dynamic variables from a shared lib into an app's dynbss
500 section, and instead use a dynamic relocation to point into the
502 #define ELIMINATE_COPY_RELOCS 1
504 /* The size in bytes of the first entry in the procedure linkage table. */
505 #define PLT_FIRST_ENTRY_SIZE 32
506 /* The size in bytes of an entry in the procedure linkage table. */
507 #define PLT_ENTRY_SIZE 32
509 #define GOT_ENTRY_SIZE 8
511 /* The first three entries in a procedure linkage table are reserved,
512 and the initial contents are unimportant (we zero them out).
513 Subsequent entries look like this. See the SVR4 ABI 386
514 supplement to see how this works. */
516 /* For the s390, simple addr offset can only be 0 - 4096.
517 To use the full 16777216 TB address space, several instructions
518 are needed to load an address in a register and execute
519 a branch( or just saving the address)
521 Furthermore, only r 0 and 1 are free to use!!! */
523 /* The first 3 words in the GOT are then reserved.
524 Word 0 is the address of the dynamic table.
525 Word 1 is a pointer to a structure describing the object
526 Word 2 is used to point to the loader entry address.
528 The code for PLT entries looks like this:
530 The GOT holds the address in the PLT to be executed.
531 The loader then gets:
532 24(15) = Pointer to the structure describing the object.
533 28(15) = Offset in symbol table
534 The loader must then find the module where the function is
535 and insert the address in the GOT.
537 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
538 LG 1,0(1) # 6 bytes Load address from GOT in r1
539 BCR 15,1 # 2 bytes Jump to address
540 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
541 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
542 BRCL 15,-x # 6 bytes Jump to start of PLT
543 .long ? # 4 bytes offset into symbol table
545 Total = 32 bytes per PLT entry
546 Fixup at offset 2: relative address to GOT entry
547 Fixup at offset 22: relative branch to PLT0
548 Fixup at offset 28: 32 bit offset into symbol table
550 A 32 bit offset into the symbol table is enough. It allows for symbol
551 tables up to a size of 2 gigabyte. A single dynamic object (the main
552 program, any shared library) is limited to 4GB in size and I want to see
553 the program that manages to have a symbol table of more than 2 GB with a
554 total size of at max 4 GB. */
556 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
557 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
558 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
559 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
560 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
561 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
562 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
563 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
565 /* The first PLT entry pushes the offset into the symbol table
566 from R1 onto the stack at 8(15) and the loader object info
567 at 12(15), loads the loader address in R1 and jumps to it. */
569 /* The first entry in the PLT:
572 STG 1,56(15) # r1 contains the offset into the symbol table
573 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
574 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
575 LG 1,16(1) # get entry address of loader
576 BCR 15,1 # jump to loader
578 Fixup at offset 8: relative address to start of GOT. */
580 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
581 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
582 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
583 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
584 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
585 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
586 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
587 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
589 /* The s390 linker needs to keep track of the number of relocs that it
590 decides to copy as dynamic relocs in check_relocs for each symbol.
591 This is so that it can later discard them if they are found to be
592 unnecessary. We store the information in a field extending the
593 regular ELF linker hash table. */
595 struct elf_s390_dyn_relocs
597 struct elf_s390_dyn_relocs *next;
599 /* The input section of the reloc. */
602 /* Total number of relocs copied for the input section. */
605 /* Number of pc-relative relocs copied for the input section. */
606 bfd_size_type pc_count;
609 /* s390 ELF linker hash entry. */
611 struct elf_s390_link_hash_entry
613 struct elf_link_hash_entry elf;
615 /* Track dynamic relocs copied for this symbol. */
616 struct elf_s390_dyn_relocs *dyn_relocs;
618 /* Number of GOTPLT references for a function. */
619 bfd_signed_vma gotplt_refcount;
621 #define GOT_UNKNOWN 0
625 #define GOT_TLS_IE_NLT 3
626 unsigned char tls_type;
629 #define elf_s390_hash_entry(ent) \
630 ((struct elf_s390_link_hash_entry *)(ent))
632 struct elf_s390_obj_tdata
634 struct elf_obj_tdata root;
636 /* tls_type for each local got entry. */
637 char *local_got_tls_type;
640 #define elf_s390_tdata(abfd) \
641 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
643 #define elf_s390_local_got_tls_type(abfd) \
644 (elf_s390_tdata (abfd)->local_got_tls_type)
647 elf_s390_mkobject (bfd *abfd)
649 if (abfd->tdata.any == NULL)
651 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
652 abfd->tdata.any = bfd_zalloc (abfd, amt);
653 if (abfd->tdata.any == NULL)
656 return bfd_elf_mkobject (abfd);
660 elf_s390_object_p (abfd)
663 /* Set the right machine number for an s390 elf32 file. */
664 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
667 /* s390 ELF linker hash table. */
669 struct elf_s390_link_hash_table
671 struct elf_link_hash_table elf;
673 /* Short-cuts to get to dynamic linker sections. */
683 bfd_signed_vma refcount;
687 /* Small local sym to section mapping cache. */
688 struct sym_sec_cache sym_sec;
691 /* Get the s390 ELF linker hash table from a link_info structure. */
693 #define elf_s390_hash_table(p) \
694 ((struct elf_s390_link_hash_table *) ((p)->hash))
696 /* Create an entry in an s390 ELF linker hash table. */
698 static struct bfd_hash_entry *
699 link_hash_newfunc (entry, table, string)
700 struct bfd_hash_entry *entry;
701 struct bfd_hash_table *table;
704 /* Allocate the structure if it has not already been allocated by a
708 entry = bfd_hash_allocate (table,
709 sizeof (struct elf_s390_link_hash_entry));
714 /* Call the allocation method of the superclass. */
715 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
718 struct elf_s390_link_hash_entry *eh;
720 eh = (struct elf_s390_link_hash_entry *) entry;
721 eh->dyn_relocs = NULL;
722 eh->gotplt_refcount = 0;
723 eh->tls_type = GOT_UNKNOWN;
729 /* Create an s390 ELF linker hash table. */
731 static struct bfd_link_hash_table *
732 elf_s390_link_hash_table_create (abfd)
735 struct elf_s390_link_hash_table *ret;
736 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
738 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
742 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
743 sizeof (struct elf_s390_link_hash_entry)))
756 ret->tls_ldm_got.refcount = 0;
757 ret->sym_sec.abfd = NULL;
759 return &ret->elf.root;
762 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
763 shortcuts to them in our hash table. */
766 create_got_section (dynobj, info)
768 struct bfd_link_info *info;
770 struct elf_s390_link_hash_table *htab;
772 if (! _bfd_elf_create_got_section (dynobj, info))
775 htab = elf_s390_hash_table (info);
776 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
777 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
778 if (!htab->sgot || !htab->sgotplt)
781 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
782 (SEC_ALLOC | SEC_LOAD
787 if (htab->srelgot == NULL
788 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
793 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
794 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
798 elf_s390_create_dynamic_sections (dynobj, info)
800 struct bfd_link_info *info;
802 struct elf_s390_link_hash_table *htab;
804 htab = elf_s390_hash_table (info);
805 if (!htab->sgot && !create_got_section (dynobj, info))
808 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
811 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
812 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
813 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
815 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
817 if (!htab->splt || !htab->srelplt || !htab->sdynbss
818 || (!info->shared && !htab->srelbss))
824 /* Copy the extra info we tack onto an elf_link_hash_entry. */
827 elf_s390_copy_indirect_symbol (info, dir, ind)
828 struct bfd_link_info *info;
829 struct elf_link_hash_entry *dir, *ind;
831 struct elf_s390_link_hash_entry *edir, *eind;
833 edir = (struct elf_s390_link_hash_entry *) dir;
834 eind = (struct elf_s390_link_hash_entry *) ind;
836 if (eind->dyn_relocs != NULL)
838 if (edir->dyn_relocs != NULL)
840 struct elf_s390_dyn_relocs **pp;
841 struct elf_s390_dyn_relocs *p;
843 /* Add reloc counts against the indirect sym to the direct sym
844 list. Merge any entries against the same section. */
845 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
847 struct elf_s390_dyn_relocs *q;
849 for (q = edir->dyn_relocs; q != NULL; q = q->next)
850 if (q->sec == p->sec)
852 q->pc_count += p->pc_count;
853 q->count += p->count;
860 *pp = edir->dyn_relocs;
863 edir->dyn_relocs = eind->dyn_relocs;
864 eind->dyn_relocs = NULL;
867 if (ind->root.type == bfd_link_hash_indirect
868 && dir->got.refcount <= 0)
870 edir->tls_type = eind->tls_type;
871 eind->tls_type = GOT_UNKNOWN;
874 if (ELIMINATE_COPY_RELOCS
875 && ind->root.type != bfd_link_hash_indirect
876 && dir->dynamic_adjusted)
878 /* If called to transfer flags for a weakdef during processing
879 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
880 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
881 dir->ref_dynamic |= ind->ref_dynamic;
882 dir->ref_regular |= ind->ref_regular;
883 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
884 dir->needs_plt |= ind->needs_plt;
887 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
891 elf_s390_tls_transition (info, r_type, is_local)
892 struct bfd_link_info *info;
904 return R_390_TLS_LE64;
905 return R_390_TLS_IE64;
906 case R_390_TLS_GOTIE64:
908 return R_390_TLS_LE64;
909 return R_390_TLS_GOTIE64;
910 case R_390_TLS_LDM64:
911 return R_390_TLS_LE64;
917 /* Look through the relocs for a section during the first phase, and
918 allocate space in the global offset table or procedure linkage
922 elf_s390_check_relocs (abfd, info, sec, relocs)
924 struct bfd_link_info *info;
926 const Elf_Internal_Rela *relocs;
928 struct elf_s390_link_hash_table *htab;
929 Elf_Internal_Shdr *symtab_hdr;
930 struct elf_link_hash_entry **sym_hashes;
931 const Elf_Internal_Rela *rel;
932 const Elf_Internal_Rela *rel_end;
934 bfd_signed_vma *local_got_refcounts;
935 int tls_type, old_tls_type;
937 if (info->relocatable)
940 htab = elf_s390_hash_table (info);
941 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
942 sym_hashes = elf_sym_hashes (abfd);
943 local_got_refcounts = elf_local_got_refcounts (abfd);
947 rel_end = relocs + sec->reloc_count;
948 for (rel = relocs; rel < rel_end; rel++)
951 unsigned long r_symndx;
952 struct elf_link_hash_entry *h;
954 r_symndx = ELF64_R_SYM (rel->r_info);
956 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
958 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
964 if (r_symndx < symtab_hdr->sh_info)
968 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
969 while (h->root.type == bfd_link_hash_indirect
970 || h->root.type == bfd_link_hash_warning)
971 h = (struct elf_link_hash_entry *) h->root.u.i.link;
974 /* Create got section and local_got_refcounts array if they
976 r_type = elf_s390_tls_transition (info,
977 ELF64_R_TYPE (rel->r_info),
992 case R_390_GOTPLTENT:
994 case R_390_TLS_GOTIE12:
995 case R_390_TLS_GOTIE20:
996 case R_390_TLS_GOTIE64:
997 case R_390_TLS_IEENT:
999 case R_390_TLS_LDM64:
1001 && local_got_refcounts == NULL)
1005 size = symtab_hdr->sh_info;
1006 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1007 local_got_refcounts = ((bfd_signed_vma *)
1008 bfd_zalloc (abfd, size));
1009 if (local_got_refcounts == NULL)
1011 elf_local_got_refcounts (abfd) = local_got_refcounts;
1012 elf_s390_local_got_tls_type (abfd)
1013 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1016 case R_390_GOTOFF16:
1017 case R_390_GOTOFF32:
1018 case R_390_GOTOFF64:
1020 case R_390_GOTPCDBL:
1021 if (htab->sgot == NULL)
1023 if (htab->elf.dynobj == NULL)
1024 htab->elf.dynobj = abfd;
1025 if (!create_got_section (htab->elf.dynobj, info))
1032 case R_390_GOTOFF16:
1033 case R_390_GOTOFF32:
1034 case R_390_GOTOFF64:
1036 case R_390_GOTPCDBL:
1037 /* Got is created, nothing to be done. */
1040 case R_390_PLT16DBL:
1042 case R_390_PLT32DBL:
1044 case R_390_PLTOFF16:
1045 case R_390_PLTOFF32:
1046 case R_390_PLTOFF64:
1047 /* This symbol requires a procedure linkage table entry. We
1048 actually build the entry in adjust_dynamic_symbol,
1049 because this might be a case of linking PIC code which is
1050 never referenced by a dynamic object, in which case we
1051 don't need to generate a procedure linkage table entry
1054 /* If this is a local symbol, we resolve it directly without
1055 creating a procedure linkage table entry. */
1059 h->plt.refcount += 1;
1063 case R_390_GOTPLT12:
1064 case R_390_GOTPLT16:
1065 case R_390_GOTPLT20:
1066 case R_390_GOTPLT32:
1067 case R_390_GOTPLT64:
1068 case R_390_GOTPLTENT:
1069 /* This symbol requires either a procedure linkage table entry
1070 or an entry in the local got. We actually build the entry
1071 in adjust_dynamic_symbol because whether this is really a
1072 global reference can change and with it the fact if we have
1073 to create a plt entry or a local got entry. To be able to
1074 make a once global symbol a local one we have to keep track
1075 of the number of gotplt references that exist for this
1079 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1081 h->plt.refcount += 1;
1084 local_got_refcounts[r_symndx] += 1;
1087 case R_390_TLS_LDM64:
1088 htab->tls_ldm_got.refcount += 1;
1091 case R_390_TLS_IE64:
1092 case R_390_TLS_GOTIE12:
1093 case R_390_TLS_GOTIE20:
1094 case R_390_TLS_GOTIE64:
1095 case R_390_TLS_IEENT:
1097 info->flags |= DF_STATIC_TLS;
1106 case R_390_TLS_GD64:
1107 /* This symbol requires a global offset table entry. */
1116 tls_type = GOT_NORMAL;
1118 case R_390_TLS_GD64:
1119 tls_type = GOT_TLS_GD;
1121 case R_390_TLS_IE64:
1122 case R_390_TLS_GOTIE64:
1123 tls_type = GOT_TLS_IE;
1125 case R_390_TLS_GOTIE12:
1126 case R_390_TLS_GOTIE20:
1127 case R_390_TLS_IEENT:
1128 tls_type = GOT_TLS_IE_NLT;
1134 h->got.refcount += 1;
1135 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1139 local_got_refcounts[r_symndx] += 1;
1140 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1142 /* If a TLS symbol is accessed using IE at least once,
1143 there is no point to use dynamic model for it. */
1144 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1146 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1148 (*_bfd_error_handler)
1149 (_("%B: `%s' accessed both as normal and thread local symbol"),
1150 abfd, h->root.root.string);
1153 if (old_tls_type > tls_type)
1154 tls_type = old_tls_type;
1157 if (old_tls_type != tls_type)
1160 elf_s390_hash_entry (h)->tls_type = tls_type;
1162 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1165 if (r_type != R_390_TLS_IE64)
1169 case R_390_TLS_LE64:
1172 info->flags |= DF_STATIC_TLS;
1184 if (h != NULL && !info->shared)
1186 /* If this reloc is in a read-only section, we might
1187 need a copy reloc. We can't check reliably at this
1188 stage whether the section is read-only, as input
1189 sections have not yet been mapped to output sections.
1190 Tentatively set the flag for now, and correct in
1191 adjust_dynamic_symbol. */
1194 /* We may need a .plt entry if the function this reloc
1195 refers to is in a shared lib. */
1196 h->plt.refcount += 1;
1199 /* If we are creating a shared library, and this is a reloc
1200 against a global symbol, or a non PC relative reloc
1201 against a local symbol, then we need to copy the reloc
1202 into the shared library. However, if we are linking with
1203 -Bsymbolic, we do not need to copy a reloc against a
1204 global symbol which is defined in an object we are
1205 including in the link (i.e., DEF_REGULAR is set). At
1206 this point we have not seen all the input files, so it is
1207 possible that DEF_REGULAR is not set now but will be set
1208 later (it is never cleared). In case of a weak definition,
1209 DEF_REGULAR may be cleared later by a strong definition in
1210 a shared library. We account for that possibility below by
1211 storing information in the relocs_copied field of the hash
1212 table entry. A similar situation occurs when creating
1213 shared libraries and symbol visibility changes render the
1216 If on the other hand, we are creating an executable, we
1217 may need to keep relocations for symbols satisfied by a
1218 dynamic library if we manage to avoid copy relocs for the
1221 && (sec->flags & SEC_ALLOC) != 0
1222 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1223 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1224 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1225 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1226 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1228 && (! info->symbolic
1229 || h->root.type == bfd_link_hash_defweak
1230 || !h->def_regular))))
1231 || (ELIMINATE_COPY_RELOCS
1233 && (sec->flags & SEC_ALLOC) != 0
1235 && (h->root.type == bfd_link_hash_defweak
1236 || !h->def_regular)))
1238 struct elf_s390_dyn_relocs *p;
1239 struct elf_s390_dyn_relocs **head;
1241 /* We must copy these reloc types into the output file.
1242 Create a reloc section in dynobj and make room for
1249 name = (bfd_elf_string_from_elf_section
1251 elf_elfheader (abfd)->e_shstrndx,
1252 elf_section_data (sec)->rel_hdr.sh_name));
1256 if (! CONST_STRNEQ (name, ".rela")
1257 || strcmp (bfd_get_section_name (abfd, sec),
1260 (*_bfd_error_handler)
1261 (_("%B: bad relocation section name `%s\'"),
1265 if (htab->elf.dynobj == NULL)
1266 htab->elf.dynobj = abfd;
1268 dynobj = htab->elf.dynobj;
1269 sreloc = bfd_get_section_by_name (dynobj, name);
1274 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1275 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1276 if ((sec->flags & SEC_ALLOC) != 0)
1277 flags |= SEC_ALLOC | SEC_LOAD;
1278 sreloc = bfd_make_section_with_flags (dynobj,
1282 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1285 elf_section_data (sec)->sreloc = sreloc;
1288 /* If this is a global symbol, we count the number of
1289 relocations we need for this symbol. */
1292 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1296 /* Track dynamic relocs needed for local syms too.
1297 We really need local syms available to do this
1303 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1308 vpp = &elf_section_data (s)->local_dynrel;
1309 head = (struct elf_s390_dyn_relocs **) vpp;
1313 if (p == NULL || p->sec != sec)
1315 bfd_size_type amt = sizeof *p;
1316 p = ((struct elf_s390_dyn_relocs *)
1317 bfd_alloc (htab->elf.dynobj, amt));
1328 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1329 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1330 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1331 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1332 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1337 /* This relocation describes the C++ object vtable hierarchy.
1338 Reconstruct it for later use during GC. */
1339 case R_390_GNU_VTINHERIT:
1340 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1344 /* This relocation describes which C++ vtable entries are actually
1345 used. Record for later use during GC. */
1346 case R_390_GNU_VTENTRY:
1347 BFD_ASSERT (h != NULL);
1349 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1361 /* Return the section that should be marked against GC for a given
1365 elf_s390_gc_mark_hook (asection *sec,
1366 struct bfd_link_info *info,
1367 Elf_Internal_Rela *rel,
1368 struct elf_link_hash_entry *h,
1369 Elf_Internal_Sym *sym)
1372 switch (ELF64_R_TYPE (rel->r_info))
1374 case R_390_GNU_VTINHERIT:
1375 case R_390_GNU_VTENTRY:
1379 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1382 /* Update the got entry reference counts for the section being removed. */
1385 elf_s390_gc_sweep_hook (bfd *abfd,
1386 struct bfd_link_info *info,
1388 const Elf_Internal_Rela *relocs)
1390 Elf_Internal_Shdr *symtab_hdr;
1391 struct elf_link_hash_entry **sym_hashes;
1392 bfd_signed_vma *local_got_refcounts;
1393 const Elf_Internal_Rela *rel, *relend;
1395 if (info->relocatable)
1398 elf_section_data (sec)->local_dynrel = NULL;
1400 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1401 sym_hashes = elf_sym_hashes (abfd);
1402 local_got_refcounts = elf_local_got_refcounts (abfd);
1404 relend = relocs + sec->reloc_count;
1405 for (rel = relocs; rel < relend; rel++)
1407 unsigned long r_symndx;
1408 unsigned int r_type;
1409 struct elf_link_hash_entry *h = NULL;
1411 r_symndx = ELF64_R_SYM (rel->r_info);
1412 if (r_symndx >= symtab_hdr->sh_info)
1414 struct elf_s390_link_hash_entry *eh;
1415 struct elf_s390_dyn_relocs **pp;
1416 struct elf_s390_dyn_relocs *p;
1418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1419 while (h->root.type == bfd_link_hash_indirect
1420 || h->root.type == bfd_link_hash_warning)
1421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1422 eh = (struct elf_s390_link_hash_entry *) h;
1424 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1427 /* Everything must go for SEC. */
1433 r_type = ELF64_R_TYPE (rel->r_info);
1434 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1437 case R_390_TLS_LDM64:
1438 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1439 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1442 case R_390_TLS_GD64:
1443 case R_390_TLS_IE64:
1444 case R_390_TLS_GOTIE12:
1445 case R_390_TLS_GOTIE20:
1446 case R_390_TLS_GOTIE64:
1447 case R_390_TLS_IEENT:
1453 case R_390_GOTOFF16:
1454 case R_390_GOTOFF32:
1455 case R_390_GOTOFF64:
1457 case R_390_GOTPCDBL:
1461 if (h->got.refcount > 0)
1462 h->got.refcount -= 1;
1464 else if (local_got_refcounts != NULL)
1466 if (local_got_refcounts[r_symndx] > 0)
1467 local_got_refcounts[r_symndx] -= 1;
1486 case R_390_PLT16DBL:
1488 case R_390_PLT32DBL:
1490 case R_390_PLTOFF16:
1491 case R_390_PLTOFF32:
1492 case R_390_PLTOFF64:
1495 if (h->plt.refcount > 0)
1496 h->plt.refcount -= 1;
1500 case R_390_GOTPLT12:
1501 case R_390_GOTPLT16:
1502 case R_390_GOTPLT20:
1503 case R_390_GOTPLT32:
1504 case R_390_GOTPLT64:
1505 case R_390_GOTPLTENT:
1508 if (h->plt.refcount > 0)
1510 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1511 h->plt.refcount -= 1;
1514 else if (local_got_refcounts != NULL)
1516 if (local_got_refcounts[r_symndx] > 0)
1517 local_got_refcounts[r_symndx] -= 1;
1529 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1530 entry but we found we will not create any. Called when we find we will
1531 not have any PLT for this symbol, by for example
1532 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1533 or elf_s390_size_dynamic_sections if no dynamic sections will be
1534 created (we're only linking static objects). */
1537 elf_s390_adjust_gotplt (h)
1538 struct elf_s390_link_hash_entry *h;
1540 if (h->elf.root.type == bfd_link_hash_warning)
1541 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1543 if (h->gotplt_refcount <= 0)
1546 /* We simply add the number of gotplt references to the number
1547 * of got references for this symbol. */
1548 h->elf.got.refcount += h->gotplt_refcount;
1549 h->gotplt_refcount = -1;
1552 /* Adjust a symbol defined by a dynamic object and referenced by a
1553 regular object. The current definition is in some section of the
1554 dynamic object, but we're not including those sections. We have to
1555 change the definition to something the rest of the link can
1559 elf_s390_adjust_dynamic_symbol (info, h)
1560 struct bfd_link_info *info;
1561 struct elf_link_hash_entry *h;
1563 struct elf_s390_link_hash_table *htab;
1566 /* If this is a function, put it in the procedure linkage table. We
1567 will fill in the contents of the procedure linkage table later
1568 (although we could actually do it here). */
1569 if (h->type == STT_FUNC
1572 if (h->plt.refcount <= 0
1576 && h->root.type != bfd_link_hash_undefweak
1577 && h->root.type != bfd_link_hash_undefined))
1579 /* This case can occur if we saw a PLT32 reloc in an input
1580 file, but the symbol was never referred to by a dynamic
1581 object, or if all references were garbage collected. In
1582 such a case, we don't actually need to build a procedure
1583 linkage table, and we can just do a PC32 reloc instead. */
1584 h->plt.offset = (bfd_vma) -1;
1586 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1592 /* It's possible that we incorrectly decided a .plt reloc was
1593 needed for an R_390_PC32 reloc to a non-function sym in
1594 check_relocs. We can't decide accurately between function and
1595 non-function syms in check-relocs; Objects loaded later in
1596 the link may change h->type. So fix it now. */
1597 h->plt.offset = (bfd_vma) -1;
1599 /* If this is a weak symbol, and there is a real definition, the
1600 processor independent code will have arranged for us to see the
1601 real definition first, and we can just use the same value. */
1602 if (h->u.weakdef != NULL)
1604 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1605 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1606 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1607 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1608 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1609 h->non_got_ref = h->u.weakdef->non_got_ref;
1613 /* This is a reference to a symbol defined by a dynamic object which
1614 is not a function. */
1616 /* If we are creating a shared library, we must presume that the
1617 only references to the symbol are via the global offset table.
1618 For such cases we need not do anything here; the relocations will
1619 be handled correctly by relocate_section. */
1623 /* If there are no references to this symbol that do not use the
1624 GOT, we don't need to generate a copy reloc. */
1625 if (!h->non_got_ref)
1628 /* If -z nocopyreloc was given, we won't generate them either. */
1629 if (info->nocopyreloc)
1635 if (ELIMINATE_COPY_RELOCS)
1637 struct elf_s390_link_hash_entry * eh;
1638 struct elf_s390_dyn_relocs *p;
1640 eh = (struct elf_s390_link_hash_entry *) h;
1641 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1643 s = p->sec->output_section;
1644 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1648 /* If we didn't find any dynamic relocs in read-only sections, then
1649 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1659 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1660 h->root.root.string);
1664 /* We must allocate the symbol in our .dynbss section, which will
1665 become part of the .bss section of the executable. There will be
1666 an entry for this symbol in the .dynsym section. The dynamic
1667 object will contain position independent code, so all references
1668 from the dynamic object to this symbol will go through the global
1669 offset table. The dynamic linker will use the .dynsym entry to
1670 determine the address it must put in the global offset table, so
1671 both the dynamic object and the regular object will refer to the
1672 same memory location for the variable. */
1674 htab = elf_s390_hash_table (info);
1676 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1677 copy the initial value out of the dynamic object and into the
1678 runtime process image. */
1679 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1681 htab->srelbss->size += sizeof (Elf64_External_Rela);
1687 return _bfd_elf_adjust_dynamic_copy (h, s);
1690 /* Allocate space in .plt, .got and associated reloc sections for
1694 allocate_dynrelocs (h, inf)
1695 struct elf_link_hash_entry *h;
1698 struct bfd_link_info *info;
1699 struct elf_s390_link_hash_table *htab;
1700 struct elf_s390_link_hash_entry *eh;
1701 struct elf_s390_dyn_relocs *p;
1703 if (h->root.type == bfd_link_hash_indirect)
1706 if (h->root.type == bfd_link_hash_warning)
1707 /* When warning symbols are created, they **replace** the "real"
1708 entry in the hash table, thus we never get to see the real
1709 symbol in a hash traversal. So look at it now. */
1710 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1712 info = (struct bfd_link_info *) inf;
1713 htab = elf_s390_hash_table (info);
1715 if (htab->elf.dynamic_sections_created
1716 && h->plt.refcount > 0
1717 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1718 || h->root.type != bfd_link_hash_undefweak))
1720 /* Make sure this symbol is output as a dynamic symbol.
1721 Undefined weak syms won't yet be marked as dynamic. */
1722 if (h->dynindx == -1
1723 && !h->forced_local)
1725 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1730 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1732 asection *s = htab->splt;
1734 /* If this is the first .plt entry, make room for the special
1737 s->size += PLT_FIRST_ENTRY_SIZE;
1739 h->plt.offset = s->size;
1741 /* If this symbol is not defined in a regular file, and we are
1742 not generating a shared library, then set the symbol to this
1743 location in the .plt. This is required to make function
1744 pointers compare as equal between the normal executable and
1745 the shared library. */
1749 h->root.u.def.section = s;
1750 h->root.u.def.value = h->plt.offset;
1753 /* Make room for this entry. */
1754 s->size += PLT_ENTRY_SIZE;
1756 /* We also need to make an entry in the .got.plt section, which
1757 will be placed in the .got section by the linker script. */
1758 htab->sgotplt->size += GOT_ENTRY_SIZE;
1760 /* We also need to make an entry in the .rela.plt section. */
1761 htab->srelplt->size += sizeof (Elf64_External_Rela);
1765 h->plt.offset = (bfd_vma) -1;
1767 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1772 h->plt.offset = (bfd_vma) -1;
1774 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1777 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1778 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1779 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1780 we can save the dynamic TLS relocation. */
1781 if (h->got.refcount > 0
1784 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1786 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1787 /* For the GOTIE access without a literal pool entry the offset has
1788 to be stored somewhere. The immediate value in the instruction
1789 is not bit enough so the value is stored in the got. */
1791 h->got.offset = htab->sgot->size;
1792 htab->sgot->size += GOT_ENTRY_SIZE;
1795 h->got.offset = (bfd_vma) -1;
1797 else if (h->got.refcount > 0)
1801 int tls_type = elf_s390_hash_entry(h)->tls_type;
1803 /* Make sure this symbol is output as a dynamic symbol.
1804 Undefined weak syms won't yet be marked as dynamic. */
1805 if (h->dynindx == -1
1806 && !h->forced_local)
1808 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1813 h->got.offset = s->size;
1814 s->size += GOT_ENTRY_SIZE;
1815 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1816 if (tls_type == GOT_TLS_GD)
1817 s->size += GOT_ENTRY_SIZE;
1818 dyn = htab->elf.dynamic_sections_created;
1819 /* R_390_TLS_IE64 needs one dynamic relocation,
1820 R_390_TLS_GD64 needs one if local symbol and two if global. */
1821 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1822 || tls_type >= GOT_TLS_IE)
1823 htab->srelgot->size += sizeof (Elf64_External_Rela);
1824 else if (tls_type == GOT_TLS_GD)
1825 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1826 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1827 || h->root.type != bfd_link_hash_undefweak)
1829 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1830 htab->srelgot->size += sizeof (Elf64_External_Rela);
1833 h->got.offset = (bfd_vma) -1;
1835 eh = (struct elf_s390_link_hash_entry *) h;
1836 if (eh->dyn_relocs == NULL)
1839 /* In the shared -Bsymbolic case, discard space allocated for
1840 dynamic pc-relative relocs against symbols which turn out to be
1841 defined in regular objects. For the normal shared case, discard
1842 space for pc-relative relocs that have become local due to symbol
1843 visibility changes. */
1847 if (SYMBOL_REFERENCES_LOCAL (info, h))
1849 struct elf_s390_dyn_relocs **pp;
1851 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1853 p->count -= p->pc_count;
1862 /* Also discard relocs on undefined weak syms with non-default
1864 if (eh->dyn_relocs != NULL
1865 && h->root.type == bfd_link_hash_undefweak)
1867 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1868 eh->dyn_relocs = NULL;
1870 /* Make sure undefined weak symbols are output as a dynamic
1872 else if (h->dynindx == -1
1873 && !h->forced_local)
1875 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1880 else if (ELIMINATE_COPY_RELOCS)
1882 /* For the non-shared case, discard space for relocs against
1883 symbols which turn out to need copy relocs or are not
1889 || (htab->elf.dynamic_sections_created
1890 && (h->root.type == bfd_link_hash_undefweak
1891 || h->root.type == bfd_link_hash_undefined))))
1893 /* Make sure this symbol is output as a dynamic symbol.
1894 Undefined weak syms won't yet be marked as dynamic. */
1895 if (h->dynindx == -1
1896 && !h->forced_local)
1898 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1902 /* If that succeeded, we know we'll be keeping all the
1904 if (h->dynindx != -1)
1908 eh->dyn_relocs = NULL;
1913 /* Finally, allocate space. */
1914 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1916 asection *sreloc = elf_section_data (p->sec)->sreloc;
1917 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1923 /* Find any dynamic relocs that apply to read-only sections. */
1926 readonly_dynrelocs (h, inf)
1927 struct elf_link_hash_entry *h;
1930 struct elf_s390_link_hash_entry *eh;
1931 struct elf_s390_dyn_relocs *p;
1933 if (h->root.type == bfd_link_hash_warning)
1934 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1936 eh = (struct elf_s390_link_hash_entry *) h;
1937 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1939 asection *s = p->sec->output_section;
1941 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1943 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1945 info->flags |= DF_TEXTREL;
1947 /* Not an error, just cut short the traversal. */
1954 /* Set the sizes of the dynamic sections. */
1957 elf_s390_size_dynamic_sections (output_bfd, info)
1958 bfd *output_bfd ATTRIBUTE_UNUSED;
1959 struct bfd_link_info *info;
1961 struct elf_s390_link_hash_table *htab;
1967 htab = elf_s390_hash_table (info);
1968 dynobj = htab->elf.dynobj;
1972 if (htab->elf.dynamic_sections_created)
1974 /* Set the contents of the .interp section to the interpreter. */
1975 if (info->executable)
1977 s = bfd_get_section_by_name (dynobj, ".interp");
1980 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1981 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1985 /* Set up .got offsets for local syms, and space for local dynamic
1987 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1989 bfd_signed_vma *local_got;
1990 bfd_signed_vma *end_local_got;
1991 char *local_tls_type;
1992 bfd_size_type locsymcount;
1993 Elf_Internal_Shdr *symtab_hdr;
1996 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1999 for (s = ibfd->sections; s != NULL; s = s->next)
2001 struct elf_s390_dyn_relocs *p;
2003 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2005 if (!bfd_is_abs_section (p->sec)
2006 && bfd_is_abs_section (p->sec->output_section))
2008 /* Input section has been discarded, either because
2009 it is a copy of a linkonce section or due to
2010 linker script /DISCARD/, so we'll be discarding
2013 else if (p->count != 0)
2015 srela = elf_section_data (p->sec)->sreloc;
2016 srela->size += p->count * sizeof (Elf64_External_Rela);
2017 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2018 info->flags |= DF_TEXTREL;
2023 local_got = elf_local_got_refcounts (ibfd);
2027 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2028 locsymcount = symtab_hdr->sh_info;
2029 end_local_got = local_got + locsymcount;
2030 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2032 srela = htab->srelgot;
2033 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2037 *local_got = s->size;
2038 s->size += GOT_ENTRY_SIZE;
2039 if (*local_tls_type == GOT_TLS_GD)
2040 s->size += GOT_ENTRY_SIZE;
2042 srela->size += sizeof (Elf64_External_Rela);
2045 *local_got = (bfd_vma) -1;
2049 if (htab->tls_ldm_got.refcount > 0)
2051 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2053 htab->tls_ldm_got.offset = htab->sgot->size;
2054 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2055 htab->srelgot->size += sizeof (Elf64_External_Rela);
2058 htab->tls_ldm_got.offset = -1;
2060 /* Allocate global sym .plt and .got entries, and space for global
2061 sym dynamic relocs. */
2062 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2064 /* We now have determined the sizes of the various dynamic sections.
2065 Allocate memory for them. */
2067 for (s = dynobj->sections; s != NULL; s = s->next)
2069 if ((s->flags & SEC_LINKER_CREATED) == 0)
2074 || s == htab->sgotplt
2075 || s == htab->sdynbss)
2077 /* Strip this section if we don't need it; see the
2080 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2082 if (s->size != 0 && s != htab->srelplt)
2085 /* We use the reloc_count field as a counter if we need
2086 to copy relocs into the output file. */
2091 /* It's not one of our sections, so don't allocate space. */
2097 /* If we don't need this section, strip it from the
2098 output file. This is to handle .rela.bss and
2099 .rela.plt. We must create it in
2100 create_dynamic_sections, because it must be created
2101 before the linker maps input sections to output
2102 sections. The linker does that before
2103 adjust_dynamic_symbol is called, and it is that
2104 function which decides whether anything needs to go
2105 into these sections. */
2107 s->flags |= SEC_EXCLUDE;
2111 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2114 /* Allocate memory for the section contents. We use bfd_zalloc
2115 here in case unused entries are not reclaimed before the
2116 section's contents are written out. This should not happen,
2117 but this way if it does, we get a R_390_NONE reloc instead
2119 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2120 if (s->contents == NULL)
2124 if (htab->elf.dynamic_sections_created)
2126 /* Add some entries to the .dynamic section. We fill in the
2127 values later, in elf_s390_finish_dynamic_sections, but we
2128 must add the entries now so that we get the correct size for
2129 the .dynamic section. The DT_DEBUG entry is filled in by the
2130 dynamic linker and used by the debugger. */
2131 #define add_dynamic_entry(TAG, VAL) \
2132 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2134 if (info->executable)
2136 if (!add_dynamic_entry (DT_DEBUG, 0))
2140 if (htab->splt->size != 0)
2142 if (!add_dynamic_entry (DT_PLTGOT, 0)
2143 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2144 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2145 || !add_dynamic_entry (DT_JMPREL, 0))
2151 if (!add_dynamic_entry (DT_RELA, 0)
2152 || !add_dynamic_entry (DT_RELASZ, 0)
2153 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2156 /* If any dynamic relocs apply to a read-only section,
2157 then we need a DT_TEXTREL entry. */
2158 if ((info->flags & DF_TEXTREL) == 0)
2159 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2162 if ((info->flags & DF_TEXTREL) != 0)
2164 if (!add_dynamic_entry (DT_TEXTREL, 0))
2169 #undef add_dynamic_entry
2174 /* Return the base VMA address which should be subtracted from real addresses
2175 when resolving @dtpoff relocation.
2176 This is PT_TLS segment p_vaddr. */
2180 struct bfd_link_info *info;
2182 /* If tls_sec is NULL, we should have signalled an error already. */
2183 if (elf_hash_table (info)->tls_sec == NULL)
2185 return elf_hash_table (info)->tls_sec->vma;
2188 /* Return the relocation value for @tpoff relocation
2189 if STT_TLS virtual address is ADDRESS. */
2192 tpoff (info, address)
2193 struct bfd_link_info *info;
2196 struct elf_link_hash_table *htab = elf_hash_table (info);
2198 /* If tls_sec is NULL, we should have signalled an error already. */
2199 if (htab->tls_sec == NULL)
2201 return htab->tls_size + htab->tls_sec->vma - address;
2204 /* Complain if TLS instruction relocation is against an invalid
2208 invalid_tls_insn (input_bfd, input_section, rel)
2210 asection *input_section;
2211 Elf_Internal_Rela *rel;
2213 reloc_howto_type *howto;
2215 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2216 (*_bfd_error_handler)
2217 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2220 (long) rel->r_offset,
2222 bfd_set_error (bfd_error_bad_value);
2225 /* Relocate a 390 ELF section. */
2228 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2229 contents, relocs, local_syms, local_sections)
2231 struct bfd_link_info *info;
2233 asection *input_section;
2235 Elf_Internal_Rela *relocs;
2236 Elf_Internal_Sym *local_syms;
2237 asection **local_sections;
2239 struct elf_s390_link_hash_table *htab;
2240 Elf_Internal_Shdr *symtab_hdr;
2241 struct elf_link_hash_entry **sym_hashes;
2242 bfd_vma *local_got_offsets;
2243 Elf_Internal_Rela *rel;
2244 Elf_Internal_Rela *relend;
2246 htab = elf_s390_hash_table (info);
2247 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2248 sym_hashes = elf_sym_hashes (input_bfd);
2249 local_got_offsets = elf_local_got_offsets (input_bfd);
2252 relend = relocs + input_section->reloc_count;
2253 for (; rel < relend; rel++)
2255 unsigned int r_type;
2256 reloc_howto_type *howto;
2257 unsigned long r_symndx;
2258 struct elf_link_hash_entry *h;
2259 Elf_Internal_Sym *sym;
2263 bfd_boolean unresolved_reloc;
2264 bfd_reloc_status_type r;
2267 r_type = ELF64_R_TYPE (rel->r_info);
2268 if (r_type == (int) R_390_GNU_VTINHERIT
2269 || r_type == (int) R_390_GNU_VTENTRY)
2271 if (r_type >= (int) R_390_max)
2273 bfd_set_error (bfd_error_bad_value);
2277 howto = elf_howto_table + r_type;
2278 r_symndx = ELF64_R_SYM (rel->r_info);
2283 unresolved_reloc = FALSE;
2284 if (r_symndx < symtab_hdr->sh_info)
2286 sym = local_syms + r_symndx;
2287 sec = local_sections[r_symndx];
2288 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2292 bfd_boolean warned ATTRIBUTE_UNUSED;
2294 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2295 r_symndx, symtab_hdr, sym_hashes,
2297 unresolved_reloc, warned);
2300 if (sec != NULL && elf_discarded_section (sec))
2302 /* For relocs against symbols from removed linkonce sections,
2303 or sections discarded by a linker script, we just want the
2304 section contents zeroed. Avoid any special processing. */
2305 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2311 if (info->relocatable)
2316 case R_390_GOTPLT12:
2317 case R_390_GOTPLT16:
2318 case R_390_GOTPLT20:
2319 case R_390_GOTPLT32:
2320 case R_390_GOTPLT64:
2321 case R_390_GOTPLTENT:
2322 /* There are three cases for a GOTPLT relocation. 1) The
2323 relocation is against the jump slot entry of a plt that
2324 will get emitted to the output file. 2) The relocation
2325 is against the jump slot of a plt entry that has been
2326 removed. elf_s390_adjust_gotplt has created a GOT entry
2327 as replacement. 3) The relocation is against a local symbol.
2328 Cases 2) and 3) are the same as the GOT relocation code
2329 so we just have to test for case 1 and fall through for
2331 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2336 Current offset - size first entry / entry size. */
2337 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2340 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2342 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2343 unresolved_reloc = FALSE;
2345 if (r_type == R_390_GOTPLTENT)
2346 relocation += htab->sgot->output_section->vma;
2357 /* Relocation is to the entry for this symbol in the global
2359 if (htab->sgot == NULL)
2366 off = h->got.offset;
2367 dyn = htab->elf.dynamic_sections_created;
2368 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2374 || (ELF_ST_VISIBILITY (h->other)
2375 && h->root.type == bfd_link_hash_undefweak))
2377 /* This is actually a static link, or it is a
2378 -Bsymbolic link and the symbol is defined
2379 locally, or the symbol was forced to be local
2380 because of a version file. We must initialize
2381 this entry in the global offset table. Since the
2382 offset must always be a multiple of 2, we use the
2383 least significant bit to record whether we have
2384 initialized it already.
2386 When doing a dynamic link, we create a .rel.got
2387 relocation entry to initialize the value. This
2388 is done in the finish_dynamic_symbol routine. */
2393 bfd_put_64 (output_bfd, relocation,
2394 htab->sgot->contents + off);
2399 unresolved_reloc = FALSE;
2403 if (local_got_offsets == NULL)
2406 off = local_got_offsets[r_symndx];
2408 /* The offset must always be a multiple of 8. We use
2409 the least significant bit to record whether we have
2410 already generated the necessary reloc. */
2415 bfd_put_64 (output_bfd, relocation,
2416 htab->sgot->contents + off);
2421 Elf_Internal_Rela outrel;
2428 outrel.r_offset = (htab->sgot->output_section->vma
2429 + htab->sgot->output_offset
2431 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2432 outrel.r_addend = relocation;
2434 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2435 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2438 local_got_offsets[r_symndx] |= 1;
2442 if (off >= (bfd_vma) -2)
2445 relocation = htab->sgot->output_offset + off;
2447 /* For @GOTENT the relocation is against the offset between
2448 the instruction and the symbols entry in the GOT and not
2449 between the start of the GOT and the symbols entry. We
2450 add the vma of the GOT to get the correct value. */
2451 if ( r_type == R_390_GOTENT
2452 || r_type == R_390_GOTPLTENT)
2453 relocation += htab->sgot->output_section->vma;
2457 case R_390_GOTOFF16:
2458 case R_390_GOTOFF32:
2459 case R_390_GOTOFF64:
2460 /* Relocation is relative to the start of the global offset
2463 /* Note that sgot->output_offset is not involved in this
2464 calculation. We always want the start of .got. If we
2465 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2466 permitted by the ABI, we might have to change this
2468 relocation -= htab->sgot->output_section->vma;
2472 case R_390_GOTPCDBL:
2473 /* Use global offset table as symbol value. */
2474 relocation = htab->sgot->output_section->vma;
2475 unresolved_reloc = FALSE;
2478 case R_390_PLT16DBL:
2480 case R_390_PLT32DBL:
2482 /* Relocation is to the entry for this symbol in the
2483 procedure linkage table. */
2485 /* Resolve a PLT32 reloc against a local symbol directly,
2486 without using the procedure linkage table. */
2490 if (h->plt.offset == (bfd_vma) -1
2491 || htab->splt == NULL)
2493 /* We didn't make a PLT entry for this symbol. This
2494 happens when statically linking PIC code, or when
2495 using -Bsymbolic. */
2499 relocation = (htab->splt->output_section->vma
2500 + htab->splt->output_offset
2502 unresolved_reloc = FALSE;
2505 case R_390_PLTOFF16:
2506 case R_390_PLTOFF32:
2507 case R_390_PLTOFF64:
2508 /* Relocation is to the entry for this symbol in the
2509 procedure linkage table relative to the start of the GOT. */
2511 /* For local symbols or if we didn't make a PLT entry for
2512 this symbol resolve the symbol directly. */
2514 || h->plt.offset == (bfd_vma) -1
2515 || htab->splt == NULL)
2517 relocation -= htab->sgot->output_section->vma;
2521 relocation = (htab->splt->output_section->vma
2522 + htab->splt->output_offset
2524 - htab->sgot->output_section->vma);
2525 unresolved_reloc = FALSE;
2537 if ((input_section->flags & SEC_ALLOC) == 0)
2542 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2543 || h->root.type != bfd_link_hash_undefweak)
2544 && ((r_type != R_390_PC16
2545 && r_type != R_390_PC16DBL
2546 && r_type != R_390_PC32
2547 && r_type != R_390_PC32DBL
2548 && r_type != R_390_PC64)
2550 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2551 || (ELIMINATE_COPY_RELOCS
2558 || h->root.type == bfd_link_hash_undefweak
2559 || h->root.type == bfd_link_hash_undefined)))
2561 Elf_Internal_Rela outrel;
2562 bfd_boolean skip, relocate;
2566 /* When generating a shared object, these relocations
2567 are copied into the output file to be resolved at run
2573 _bfd_elf_section_offset (output_bfd, info, input_section,
2575 if (outrel.r_offset == (bfd_vma) -1)
2577 else if (outrel.r_offset == (bfd_vma) -2)
2578 skip = TRUE, relocate = TRUE;
2580 outrel.r_offset += (input_section->output_section->vma
2581 + input_section->output_offset);
2584 memset (&outrel, 0, sizeof outrel);
2587 && (r_type == R_390_PC16
2588 || r_type == R_390_PC16DBL
2589 || r_type == R_390_PC32
2590 || r_type == R_390_PC32DBL
2591 || r_type == R_390_PC64
2594 || !h->def_regular))
2596 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2597 outrel.r_addend = rel->r_addend;
2601 /* This symbol is local, or marked to become local. */
2602 outrel.r_addend = relocation + rel->r_addend;
2603 if (r_type == R_390_64)
2606 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2612 if (bfd_is_abs_section (sec))
2614 else if (sec == NULL || sec->owner == NULL)
2616 bfd_set_error(bfd_error_bad_value);
2623 osec = sec->output_section;
2624 sindx = elf_section_data (osec)->dynindx;
2628 osec = htab->elf.text_index_section;
2629 sindx = elf_section_data (osec)->dynindx;
2631 BFD_ASSERT (sindx != 0);
2633 /* We are turning this relocation into one
2634 against a section symbol, so subtract out
2635 the output section's address but not the
2636 offset of the input section in the output
2638 outrel.r_addend -= osec->vma;
2640 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2644 sreloc = elf_section_data (input_section)->sreloc;
2648 loc = sreloc->contents;
2649 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2650 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2652 /* If this reloc is against an external symbol, we do
2653 not want to fiddle with the addend. Otherwise, we
2654 need to include the symbol value so that it becomes
2655 an addend for the dynamic reloc. */
2662 /* Relocations for tls literal pool entries. */
2663 case R_390_TLS_IE64:
2666 Elf_Internal_Rela outrel;
2670 outrel.r_offset = rel->r_offset
2671 + input_section->output_section->vma
2672 + input_section->output_offset;
2673 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2674 sreloc = elf_section_data (input_section)->sreloc;
2677 loc = sreloc->contents;
2678 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2679 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2683 case R_390_TLS_GD64:
2684 case R_390_TLS_GOTIE64:
2685 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2686 tls_type = GOT_UNKNOWN;
2687 if (h == NULL && local_got_offsets)
2688 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2691 tls_type = elf_s390_hash_entry(h)->tls_type;
2692 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2693 r_type = R_390_TLS_LE64;
2695 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2696 r_type = R_390_TLS_IE64;
2698 if (r_type == R_390_TLS_LE64)
2700 /* This relocation gets optimized away by the local exec
2701 access optimization. */
2702 BFD_ASSERT (! unresolved_reloc);
2703 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2704 contents + rel->r_offset);
2708 if (htab->sgot == NULL)
2712 off = h->got.offset;
2715 if (local_got_offsets == NULL)
2718 off = local_got_offsets[r_symndx];
2727 Elf_Internal_Rela outrel;
2731 if (htab->srelgot == NULL)
2734 outrel.r_offset = (htab->sgot->output_section->vma
2735 + htab->sgot->output_offset + off);
2737 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2738 if (r_type == R_390_TLS_GD64)
2739 dr_type = R_390_TLS_DTPMOD;
2741 dr_type = R_390_TLS_TPOFF;
2742 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2743 outrel.r_addend = relocation - dtpoff_base (info);
2745 outrel.r_addend = 0;
2746 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2747 loc = htab->srelgot->contents;
2748 loc += htab->srelgot->reloc_count++
2749 * sizeof (Elf64_External_Rela);
2750 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2752 if (r_type == R_390_TLS_GD64)
2756 BFD_ASSERT (! unresolved_reloc);
2757 bfd_put_64 (output_bfd,
2758 relocation - dtpoff_base (info),
2759 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2763 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2764 outrel.r_offset += GOT_ENTRY_SIZE;
2765 outrel.r_addend = 0;
2766 htab->srelgot->reloc_count++;
2767 loc += sizeof (Elf64_External_Rela);
2768 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2775 local_got_offsets[r_symndx] |= 1;
2778 if (off >= (bfd_vma) -2)
2780 if (r_type == ELF64_R_TYPE (rel->r_info))
2782 relocation = htab->sgot->output_offset + off;
2783 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2784 relocation += htab->sgot->output_section->vma;
2785 unresolved_reloc = FALSE;
2789 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2790 contents + rel->r_offset);
2795 case R_390_TLS_GOTIE12:
2796 case R_390_TLS_GOTIE20:
2797 case R_390_TLS_IEENT:
2800 if (local_got_offsets == NULL)
2802 off = local_got_offsets[r_symndx];
2804 goto emit_tls_relocs;
2808 off = h->got.offset;
2809 tls_type = elf_s390_hash_entry(h)->tls_type;
2810 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2811 goto emit_tls_relocs;
2814 if (htab->sgot == NULL)
2817 BFD_ASSERT (! unresolved_reloc);
2818 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2819 htab->sgot->contents + off);
2820 relocation = htab->sgot->output_offset + off;
2821 if (r_type == R_390_TLS_IEENT)
2822 relocation += htab->sgot->output_section->vma;
2823 unresolved_reloc = FALSE;
2826 case R_390_TLS_LDM64:
2828 /* The literal pool entry this relocation refers to gets ignored
2829 by the optimized code of the local exec model. Do nothing
2830 and the value will turn out zero. */
2833 if (htab->sgot == NULL)
2836 off = htab->tls_ldm_got.offset;
2841 Elf_Internal_Rela outrel;
2844 if (htab->srelgot == NULL)
2847 outrel.r_offset = (htab->sgot->output_section->vma
2848 + htab->sgot->output_offset + off);
2850 bfd_put_64 (output_bfd, 0,
2851 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2852 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2853 outrel.r_addend = 0;
2854 loc = htab->srelgot->contents;
2855 loc += htab->srelgot->reloc_count++
2856 * sizeof (Elf64_External_Rela);
2857 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2858 htab->tls_ldm_got.offset |= 1;
2860 relocation = htab->sgot->output_offset + off;
2861 unresolved_reloc = FALSE;
2864 case R_390_TLS_LE64:
2867 /* Linking a shared library with non-fpic code requires
2868 a R_390_TLS_TPOFF relocation. */
2869 Elf_Internal_Rela outrel;
2874 outrel.r_offset = rel->r_offset
2875 + input_section->output_section->vma
2876 + input_section->output_offset;
2877 if (h != NULL && h->dynindx != -1)
2881 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2883 outrel.r_addend = relocation - dtpoff_base (info);
2885 outrel.r_addend = 0;
2886 sreloc = elf_section_data (input_section)->sreloc;
2889 loc = sreloc->contents;
2890 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2891 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2895 BFD_ASSERT (! unresolved_reloc);
2896 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2897 contents + rel->r_offset);
2901 case R_390_TLS_LDO64:
2903 relocation -= dtpoff_base (info);
2905 /* When converting LDO to LE, we must negate. */
2906 relocation = -tpoff (info, relocation);
2909 /* Relocations for tls instructions. */
2910 case R_390_TLS_LOAD:
2911 case R_390_TLS_GDCALL:
2912 case R_390_TLS_LDCALL:
2913 tls_type = GOT_UNKNOWN;
2914 if (h == NULL && local_got_offsets)
2915 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2917 tls_type = elf_s390_hash_entry(h)->tls_type;
2919 if (tls_type == GOT_TLS_GD)
2922 if (r_type == R_390_TLS_LOAD)
2924 if (!info->shared && (h == NULL || h->dynindx == -1))
2926 /* IE->LE transition. Four valid cases:
2927 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2928 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2929 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2930 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2931 unsigned int insn0, insn1, ry;
2933 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2934 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2935 if (insn1 != 0x0004)
2936 invalid_tls_insn (input_bfd, input_section, rel);
2938 if ((insn0 & 0xff00f000) == 0xe3000000)
2939 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2940 ry = (insn0 & 0x000f0000);
2941 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2942 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2943 ry = (insn0 & 0x0000f000) << 4;
2944 else if ((insn0 & 0xff00f000) == 0xe300c000)
2945 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2946 ry = (insn0 & 0x000f0000);
2947 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2948 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2949 ry = (insn0 & 0x0000f000) << 4;
2951 invalid_tls_insn (input_bfd, input_section, rel);
2952 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2954 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2955 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2958 else if (r_type == R_390_TLS_GDCALL)
2960 unsigned int insn0, insn1;
2962 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2963 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2964 if ((insn0 & 0xffff0000) != 0xc0e50000)
2965 invalid_tls_insn (input_bfd, input_section, rel);
2966 if (!info->shared && (h == NULL || h->dynindx == -1))
2968 /* GD->LE transition.
2969 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2975 /* GD->IE transition.
2976 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2980 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2981 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2983 else if (r_type == R_390_TLS_LDCALL)
2987 unsigned int insn0, insn1;
2989 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2990 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2991 if ((insn0 & 0xffff0000) != 0xc0e50000)
2992 invalid_tls_insn (input_bfd, input_section, rel);
2993 /* LD->LE transition.
2994 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2997 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2998 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3007 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3008 because such sections are not SEC_ALLOC and thus ld.so will
3009 not process them. */
3010 if (unresolved_reloc
3011 && !((input_section->flags & SEC_DEBUGGING) != 0
3013 (*_bfd_error_handler)
3014 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3017 (long) rel->r_offset,
3019 h->root.root.string);
3021 if (r_type == R_390_20
3022 || r_type == R_390_GOT20
3023 || r_type == R_390_GOTPLT20
3024 || r_type == R_390_TLS_GOTIE20)
3026 relocation += rel->r_addend;
3027 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3028 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3029 contents, rel->r_offset,
3033 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3034 contents, rel->r_offset,
3035 relocation, rel->r_addend);
3037 if (r != bfd_reloc_ok)
3042 name = h->root.root.string;
3045 name = bfd_elf_string_from_elf_section (input_bfd,
3046 symtab_hdr->sh_link,
3051 name = bfd_section_name (input_bfd, sec);
3054 if (r == bfd_reloc_overflow)
3057 if (! ((*info->callbacks->reloc_overflow)
3058 (info, (h ? &h->root : NULL), name, howto->name,
3059 (bfd_vma) 0, input_bfd, input_section,
3065 (*_bfd_error_handler)
3066 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3067 input_bfd, input_section,
3068 (long) rel->r_offset, name, (int) r);
3077 /* Finish up dynamic symbol handling. We set the contents of various
3078 dynamic sections here. */
3081 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3083 struct bfd_link_info *info;
3084 struct elf_link_hash_entry *h;
3085 Elf_Internal_Sym *sym;
3087 struct elf_s390_link_hash_table *htab;
3089 htab = elf_s390_hash_table (info);
3091 if (h->plt.offset != (bfd_vma) -1)
3095 Elf_Internal_Rela rela;
3098 /* This symbol has an entry in the procedure linkage table. Set
3101 if (h->dynindx == -1
3102 || htab->splt == NULL
3103 || htab->sgotplt == NULL
3104 || htab->srelplt == NULL)
3108 Current offset - size first entry / entry size. */
3109 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3111 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3113 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3115 /* Fill in the blueprint of a PLT. */
3116 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3117 htab->splt->contents + h->plt.offset);
3118 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3119 htab->splt->contents + h->plt.offset + 4);
3120 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3121 htab->splt->contents + h->plt.offset + 8);
3122 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3123 htab->splt->contents + h->plt.offset + 12);
3124 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3125 htab->splt->contents + h->plt.offset + 16);
3126 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3127 htab->splt->contents + h->plt.offset + 20);
3128 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3129 htab->splt->contents + h->plt.offset + 24);
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3131 htab->splt->contents + h->plt.offset + 28);
3132 /* Fixup the relative address to the GOT entry */
3133 bfd_put_32 (output_bfd,
3134 (htab->sgotplt->output_section->vma +
3135 htab->sgotplt->output_offset + got_offset
3136 - (htab->splt->output_section->vma + h->plt.offset))/2,
3137 htab->splt->contents + h->plt.offset + 2);
3138 /* Fixup the relative branch to PLT 0 */
3139 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3140 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3141 htab->splt->contents + h->plt.offset + 24);
3142 /* Fixup offset into symbol table */
3143 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3144 htab->splt->contents + h->plt.offset + 28);
3146 /* Fill in the entry in the global offset table.
3147 Points to instruction after GOT offset. */
3148 bfd_put_64 (output_bfd,
3149 (htab->splt->output_section->vma
3150 + htab->splt->output_offset
3153 htab->sgotplt->contents + got_offset);
3155 /* Fill in the entry in the .rela.plt section. */
3156 rela.r_offset = (htab->sgotplt->output_section->vma
3157 + htab->sgotplt->output_offset
3159 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3161 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3162 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3164 if (!h->def_regular)
3166 /* Mark the symbol as undefined, rather than as defined in
3167 the .plt section. Leave the value alone. This is a clue
3168 for the dynamic linker, to make function pointer
3169 comparisons work between an application and shared
3171 sym->st_shndx = SHN_UNDEF;
3175 if (h->got.offset != (bfd_vma) -1
3176 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3177 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3178 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3180 Elf_Internal_Rela rela;
3183 /* This symbol has an entry in the global offset table. Set it
3185 if (htab->sgot == NULL || htab->srelgot == NULL)
3188 rela.r_offset = (htab->sgot->output_section->vma
3189 + htab->sgot->output_offset
3190 + (h->got.offset &~ (bfd_vma) 1));
3192 /* If this is a static link, or it is a -Bsymbolic link and the
3193 symbol is defined locally or was forced to be local because
3194 of a version file, we just want to emit a RELATIVE reloc.
3195 The entry in the global offset table will already have been
3196 initialized in the relocate_section function. */
3203 BFD_ASSERT((h->got.offset & 1) != 0);
3204 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3205 rela.r_addend = (h->root.u.def.value
3206 + h->root.u.def.section->output_section->vma
3207 + h->root.u.def.section->output_offset);
3211 BFD_ASSERT((h->got.offset & 1) == 0);
3212 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3213 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3217 loc = htab->srelgot->contents;
3218 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3219 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3224 Elf_Internal_Rela rela;
3227 /* This symbols needs a copy reloc. Set it up. */
3229 if (h->dynindx == -1
3230 || (h->root.type != bfd_link_hash_defined
3231 && h->root.type != bfd_link_hash_defweak)
3232 || htab->srelbss == NULL)
3235 rela.r_offset = (h->root.u.def.value
3236 + h->root.u.def.section->output_section->vma
3237 + h->root.u.def.section->output_offset);
3238 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3240 loc = htab->srelbss->contents;
3241 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3242 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3245 /* Mark some specially defined symbols as absolute. */
3246 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3247 || h == htab->elf.hgot
3248 || h == htab->elf.hplt)
3249 sym->st_shndx = SHN_ABS;
3254 /* Used to decide how to sort relocs in an optimal manner for the
3255 dynamic linker, before writing them out. */
3257 static enum elf_reloc_type_class
3258 elf_s390_reloc_type_class (rela)
3259 const Elf_Internal_Rela *rela;
3261 switch ((int) ELF64_R_TYPE (rela->r_info))
3263 case R_390_RELATIVE:
3264 return reloc_class_relative;
3265 case R_390_JMP_SLOT:
3266 return reloc_class_plt;
3268 return reloc_class_copy;
3270 return reloc_class_normal;
3274 /* Finish up the dynamic sections. */
3277 elf_s390_finish_dynamic_sections (output_bfd, info)
3279 struct bfd_link_info *info;
3281 struct elf_s390_link_hash_table *htab;
3285 htab = elf_s390_hash_table (info);
3286 dynobj = htab->elf.dynobj;
3287 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3289 if (htab->elf.dynamic_sections_created)
3291 Elf64_External_Dyn *dyncon, *dynconend;
3293 if (sdyn == NULL || htab->sgot == NULL)
3296 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3297 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3298 for (; dyncon < dynconend; dyncon++)
3300 Elf_Internal_Dyn dyn;
3303 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3311 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3315 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3319 s = htab->srelplt->output_section;
3320 dyn.d_un.d_val = s->size;
3324 /* The procedure linkage table relocs (DT_JMPREL) should
3325 not be included in the overall relocs (DT_RELA).
3326 Therefore, we override the DT_RELASZ entry here to
3327 make it not include the JMPREL relocs. Since the
3328 linker script arranges for .rela.plt to follow all
3329 other relocation sections, we don't have to worry
3330 about changing the DT_RELA entry. */
3331 s = htab->srelplt->output_section;
3332 dyn.d_un.d_val -= s->size;
3336 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3339 /* Fill in the special first entry in the procedure linkage table. */
3340 if (htab->splt && htab->splt->size > 0)
3342 /* fill in blueprint for plt 0 entry */
3343 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3344 htab->splt->contents );
3345 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3346 htab->splt->contents +4 );
3347 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3348 htab->splt->contents +12 );
3349 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3350 htab->splt->contents +16 );
3351 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3352 htab->splt->contents +20 );
3353 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3354 htab->splt->contents + 24);
3355 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3356 htab->splt->contents + 28 );
3357 /* Fixup relative address to start of GOT */
3358 bfd_put_32 (output_bfd,
3359 (htab->sgotplt->output_section->vma +
3360 htab->sgotplt->output_offset
3361 - htab->splt->output_section->vma - 6)/2,
3362 htab->splt->contents + 8);
3364 elf_section_data (htab->splt->output_section)
3365 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3370 /* Fill in the first three entries in the global offset table. */
3371 if (htab->sgotplt->size > 0)
3373 bfd_put_64 (output_bfd,
3374 (sdyn == NULL ? (bfd_vma) 0
3375 : sdyn->output_section->vma + sdyn->output_offset),
3376 htab->sgotplt->contents);
3377 /* One entry for shared object struct ptr. */
3378 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3379 /* One entry for _dl_runtime_resolve. */
3380 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3383 elf_section_data (htab->sgot->output_section)
3384 ->this_hdr.sh_entsize = 8;
3389 /* Return address for Ith PLT stub in section PLT, for relocation REL
3390 or (bfd_vma) -1 if it should not be included. */
3393 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3394 const arelent *rel ATTRIBUTE_UNUSED)
3396 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3400 /* Why was the hash table entry size definition changed from
3401 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3402 this is the only reason for the s390_elf64_size_info structure. */
3404 const struct elf_size_info s390_elf64_size_info =
3406 sizeof (Elf64_External_Ehdr),
3407 sizeof (Elf64_External_Phdr),
3408 sizeof (Elf64_External_Shdr),
3409 sizeof (Elf64_External_Rel),
3410 sizeof (Elf64_External_Rela),
3411 sizeof (Elf64_External_Sym),
3412 sizeof (Elf64_External_Dyn),
3413 sizeof (Elf_External_Note),
3414 8, /* hash-table entry size. */
3415 1, /* internal relocations per external relocations. */
3416 64, /* arch_size. */
3417 3, /* log_file_align. */
3418 ELFCLASS64, EV_CURRENT,
3419 bfd_elf64_write_out_phdrs,
3420 bfd_elf64_write_shdrs_and_ehdr,
3421 bfd_elf64_checksum_contents,
3422 bfd_elf64_write_relocs,
3423 bfd_elf64_swap_symbol_in,
3424 bfd_elf64_swap_symbol_out,
3425 bfd_elf64_slurp_reloc_table,
3426 bfd_elf64_slurp_symbol_table,
3427 bfd_elf64_swap_dyn_in,
3428 bfd_elf64_swap_dyn_out,
3429 bfd_elf64_swap_reloc_in,
3430 bfd_elf64_swap_reloc_out,
3431 bfd_elf64_swap_reloca_in,
3432 bfd_elf64_swap_reloca_out
3435 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3436 #define TARGET_BIG_NAME "elf64-s390"
3437 #define ELF_ARCH bfd_arch_s390
3438 #define ELF_MACHINE_CODE EM_S390
3439 #define ELF_MACHINE_ALT1 EM_S390_OLD
3440 #define ELF_MAXPAGESIZE 0x1000
3442 #define elf_backend_size_info s390_elf64_size_info
3444 #define elf_backend_can_gc_sections 1
3445 #define elf_backend_can_refcount 1
3446 #define elf_backend_want_got_plt 1
3447 #define elf_backend_plt_readonly 1
3448 #define elf_backend_want_plt_sym 0
3449 #define elf_backend_got_header_size 24
3450 #define elf_backend_rela_normal 1
3452 #define elf_info_to_howto elf_s390_info_to_howto
3454 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3455 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3456 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3457 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3459 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3460 #define elf_backend_check_relocs elf_s390_check_relocs
3461 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3462 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3463 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3464 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3465 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3466 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3467 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3468 #define elf_backend_relocate_section elf_s390_relocate_section
3469 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3470 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3471 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3472 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3474 #define bfd_elf64_mkobject elf_s390_mkobject
3475 #define elf_backend_object_p elf_s390_object_p
3477 #include "elf64-target.h"