1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2010, 2011, 2012 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 /* NOTE: Keep this structure in sync with
633 the one declared in elf32-s390.c. */
634 struct elf_s390_obj_tdata
636 struct elf_obj_tdata root;
638 /* TLS type for each local got entry. */
639 char *local_got_tls_type;
642 #define elf_s390_tdata(abfd) \
643 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
645 #define elf_s390_local_got_tls_type(abfd) \
646 (elf_s390_tdata (abfd)->local_got_tls_type)
648 #define is_s390_elf(bfd) \
649 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
650 && elf_tdata (bfd) != NULL \
651 && elf_object_id (bfd) == S390_ELF_DATA)
654 elf_s390_mkobject (bfd *abfd)
656 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
661 elf_s390_object_p (abfd)
664 /* Set the right machine number for an s390 elf32 file. */
665 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
668 /* s390 ELF linker hash table. */
670 struct elf_s390_link_hash_table
672 struct elf_link_hash_table elf;
674 /* Short-cuts to get to dynamic linker sections. */
684 bfd_signed_vma refcount;
688 /* Small local sym cache. */
689 struct sym_cache sym_cache;
692 /* Get the s390 ELF linker hash table from a link_info structure. */
694 #define elf_s390_hash_table(p) \
695 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
696 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
698 /* Create an entry in an s390 ELF linker hash table. */
700 static struct bfd_hash_entry *
701 link_hash_newfunc (entry, table, string)
702 struct bfd_hash_entry *entry;
703 struct bfd_hash_table *table;
706 /* Allocate the structure if it has not already been allocated by a
710 entry = bfd_hash_allocate (table,
711 sizeof (struct elf_s390_link_hash_entry));
716 /* Call the allocation method of the superclass. */
717 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
720 struct elf_s390_link_hash_entry *eh;
722 eh = (struct elf_s390_link_hash_entry *) entry;
723 eh->dyn_relocs = NULL;
724 eh->gotplt_refcount = 0;
725 eh->tls_type = GOT_UNKNOWN;
731 /* Create an s390 ELF linker hash table. */
733 static struct bfd_link_hash_table *
734 elf_s390_link_hash_table_create (abfd)
737 struct elf_s390_link_hash_table *ret;
738 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
740 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
744 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
745 sizeof (struct elf_s390_link_hash_entry),
759 ret->tls_ldm_got.refcount = 0;
760 ret->sym_cache.abfd = NULL;
762 return &ret->elf.root;
765 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
766 shortcuts to them in our hash table. */
769 create_got_section (bfd *dynobj,
770 struct bfd_link_info *info)
772 struct elf_s390_link_hash_table *htab;
774 if (! _bfd_elf_create_got_section (dynobj, info))
777 htab = elf_s390_hash_table (info);
781 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
782 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
783 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
784 if (!htab->sgot || !htab->sgotplt || !htab->srelgot)
789 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
790 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
794 elf_s390_create_dynamic_sections (bfd *dynobj,
795 struct bfd_link_info *info)
797 struct elf_s390_link_hash_table *htab;
799 htab = elf_s390_hash_table (info);
803 if (!htab->sgot && !create_got_section (dynobj, info))
806 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
809 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
810 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
811 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
813 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
815 if (!htab->splt || !htab->srelplt || !htab->sdynbss
816 || (!info->shared && !htab->srelbss))
822 /* Copy the extra info we tack onto an elf_link_hash_entry. */
825 elf_s390_copy_indirect_symbol (info, dir, ind)
826 struct bfd_link_info *info;
827 struct elf_link_hash_entry *dir, *ind;
829 struct elf_s390_link_hash_entry *edir, *eind;
831 edir = (struct elf_s390_link_hash_entry *) dir;
832 eind = (struct elf_s390_link_hash_entry *) ind;
834 if (eind->dyn_relocs != NULL)
836 if (edir->dyn_relocs != NULL)
838 struct elf_s390_dyn_relocs **pp;
839 struct elf_s390_dyn_relocs *p;
841 /* Add reloc counts against the indirect sym to the direct sym
842 list. Merge any entries against the same section. */
843 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
845 struct elf_s390_dyn_relocs *q;
847 for (q = edir->dyn_relocs; q != NULL; q = q->next)
848 if (q->sec == p->sec)
850 q->pc_count += p->pc_count;
851 q->count += p->count;
858 *pp = edir->dyn_relocs;
861 edir->dyn_relocs = eind->dyn_relocs;
862 eind->dyn_relocs = NULL;
865 if (ind->root.type == bfd_link_hash_indirect
866 && dir->got.refcount <= 0)
868 edir->tls_type = eind->tls_type;
869 eind->tls_type = GOT_UNKNOWN;
872 if (ELIMINATE_COPY_RELOCS
873 && ind->root.type != bfd_link_hash_indirect
874 && dir->dynamic_adjusted)
876 /* If called to transfer flags for a weakdef during processing
877 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
878 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
879 dir->ref_dynamic |= ind->ref_dynamic;
880 dir->ref_regular |= ind->ref_regular;
881 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
882 dir->needs_plt |= ind->needs_plt;
885 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
889 elf_s390_tls_transition (info, r_type, is_local)
890 struct bfd_link_info *info;
902 return R_390_TLS_LE64;
903 return R_390_TLS_IE64;
904 case R_390_TLS_GOTIE64:
906 return R_390_TLS_LE64;
907 return R_390_TLS_GOTIE64;
908 case R_390_TLS_LDM64:
909 return R_390_TLS_LE64;
915 /* Look through the relocs for a section during the first phase, and
916 allocate space in the global offset table or procedure linkage
920 elf_s390_check_relocs (bfd *abfd,
921 struct bfd_link_info *info,
923 const Elf_Internal_Rela *relocs)
925 struct elf_s390_link_hash_table *htab;
926 Elf_Internal_Shdr *symtab_hdr;
927 struct elf_link_hash_entry **sym_hashes;
928 const Elf_Internal_Rela *rel;
929 const Elf_Internal_Rela *rel_end;
931 bfd_signed_vma *local_got_refcounts;
932 int tls_type, old_tls_type;
934 if (info->relocatable)
937 BFD_ASSERT (is_s390_elf (abfd));
939 htab = elf_s390_hash_table (info);
943 symtab_hdr = &elf_symtab_hdr (abfd);
944 sym_hashes = elf_sym_hashes (abfd);
945 local_got_refcounts = elf_local_got_refcounts (abfd);
949 rel_end = relocs + sec->reloc_count;
950 for (rel = relocs; rel < rel_end; rel++)
953 unsigned long r_symndx;
954 struct elf_link_hash_entry *h;
956 r_symndx = ELF64_R_SYM (rel->r_info);
958 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
960 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
966 if (r_symndx < symtab_hdr->sh_info)
970 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
971 while (h->root.type == bfd_link_hash_indirect
972 || h->root.type == bfd_link_hash_warning)
973 h = (struct elf_link_hash_entry *) h->root.u.i.link;
976 /* Create got section and local_got_refcounts array if they
978 r_type = elf_s390_tls_transition (info,
979 ELF64_R_TYPE (rel->r_info),
994 case R_390_GOTPLTENT:
996 case R_390_TLS_GOTIE12:
997 case R_390_TLS_GOTIE20:
998 case R_390_TLS_GOTIE64:
999 case R_390_TLS_IEENT:
1000 case R_390_TLS_IE64:
1001 case R_390_TLS_LDM64:
1003 && local_got_refcounts == NULL)
1007 size = symtab_hdr->sh_info;
1008 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1009 local_got_refcounts = ((bfd_signed_vma *)
1010 bfd_zalloc (abfd, size));
1011 if (local_got_refcounts == NULL)
1013 elf_local_got_refcounts (abfd) = local_got_refcounts;
1014 elf_s390_local_got_tls_type (abfd)
1015 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1018 case R_390_GOTOFF16:
1019 case R_390_GOTOFF32:
1020 case R_390_GOTOFF64:
1022 case R_390_GOTPCDBL:
1023 if (htab->sgot == NULL)
1025 if (htab->elf.dynobj == NULL)
1026 htab->elf.dynobj = abfd;
1027 if (!create_got_section (htab->elf.dynobj, info))
1034 case R_390_GOTOFF16:
1035 case R_390_GOTOFF32:
1036 case R_390_GOTOFF64:
1038 case R_390_GOTPCDBL:
1039 /* Got is created, nothing to be done. */
1042 case R_390_PLT16DBL:
1044 case R_390_PLT32DBL:
1046 case R_390_PLTOFF16:
1047 case R_390_PLTOFF32:
1048 case R_390_PLTOFF64:
1049 /* This symbol requires a procedure linkage table entry. We
1050 actually build the entry in adjust_dynamic_symbol,
1051 because this might be a case of linking PIC code which is
1052 never referenced by a dynamic object, in which case we
1053 don't need to generate a procedure linkage table entry
1056 /* If this is a local symbol, we resolve it directly without
1057 creating a procedure linkage table entry. */
1061 h->plt.refcount += 1;
1065 case R_390_GOTPLT12:
1066 case R_390_GOTPLT16:
1067 case R_390_GOTPLT20:
1068 case R_390_GOTPLT32:
1069 case R_390_GOTPLT64:
1070 case R_390_GOTPLTENT:
1071 /* This symbol requires either a procedure linkage table entry
1072 or an entry in the local got. We actually build the entry
1073 in adjust_dynamic_symbol because whether this is really a
1074 global reference can change and with it the fact if we have
1075 to create a plt entry or a local got entry. To be able to
1076 make a once global symbol a local one we have to keep track
1077 of the number of gotplt references that exist for this
1081 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1083 h->plt.refcount += 1;
1086 local_got_refcounts[r_symndx] += 1;
1089 case R_390_TLS_LDM64:
1090 htab->tls_ldm_got.refcount += 1;
1093 case R_390_TLS_IE64:
1094 case R_390_TLS_GOTIE12:
1095 case R_390_TLS_GOTIE20:
1096 case R_390_TLS_GOTIE64:
1097 case R_390_TLS_IEENT:
1099 info->flags |= DF_STATIC_TLS;
1108 case R_390_TLS_GD64:
1109 /* This symbol requires a global offset table entry. */
1118 tls_type = GOT_NORMAL;
1120 case R_390_TLS_GD64:
1121 tls_type = GOT_TLS_GD;
1123 case R_390_TLS_IE64:
1124 case R_390_TLS_GOTIE64:
1125 tls_type = GOT_TLS_IE;
1127 case R_390_TLS_GOTIE12:
1128 case R_390_TLS_GOTIE20:
1129 case R_390_TLS_IEENT:
1130 tls_type = GOT_TLS_IE_NLT;
1136 h->got.refcount += 1;
1137 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1141 local_got_refcounts[r_symndx] += 1;
1142 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1144 /* If a TLS symbol is accessed using IE at least once,
1145 there is no point to use dynamic model for it. */
1146 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1148 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1150 (*_bfd_error_handler)
1151 (_("%B: `%s' accessed both as normal and thread local symbol"),
1152 abfd, h->root.root.string);
1155 if (old_tls_type > tls_type)
1156 tls_type = old_tls_type;
1159 if (old_tls_type != tls_type)
1162 elf_s390_hash_entry (h)->tls_type = tls_type;
1164 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1167 if (r_type != R_390_TLS_IE64)
1171 case R_390_TLS_LE64:
1174 info->flags |= DF_STATIC_TLS;
1186 if (h != NULL && !info->shared)
1188 /* If this reloc is in a read-only section, we might
1189 need a copy reloc. We can't check reliably at this
1190 stage whether the section is read-only, as input
1191 sections have not yet been mapped to output sections.
1192 Tentatively set the flag for now, and correct in
1193 adjust_dynamic_symbol. */
1196 /* We may need a .plt entry if the function this reloc
1197 refers to is in a shared lib. */
1198 h->plt.refcount += 1;
1201 /* If we are creating a shared library, and this is a reloc
1202 against a global symbol, or a non PC relative reloc
1203 against a local symbol, then we need to copy the reloc
1204 into the shared library. However, if we are linking with
1205 -Bsymbolic, we do not need to copy a reloc against a
1206 global symbol which is defined in an object we are
1207 including in the link (i.e., DEF_REGULAR is set). At
1208 this point we have not seen all the input files, so it is
1209 possible that DEF_REGULAR is not set now but will be set
1210 later (it is never cleared). In case of a weak definition,
1211 DEF_REGULAR may be cleared later by a strong definition in
1212 a shared library. We account for that possibility below by
1213 storing information in the relocs_copied field of the hash
1214 table entry. A similar situation occurs when creating
1215 shared libraries and symbol visibility changes render the
1218 If on the other hand, we are creating an executable, we
1219 may need to keep relocations for symbols satisfied by a
1220 dynamic library if we manage to avoid copy relocs for the
1223 && (sec->flags & SEC_ALLOC) != 0
1224 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1225 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1226 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1227 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1228 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1230 && (! SYMBOLIC_BIND (info, h)
1231 || h->root.type == bfd_link_hash_defweak
1232 || !h->def_regular))))
1233 || (ELIMINATE_COPY_RELOCS
1235 && (sec->flags & SEC_ALLOC) != 0
1237 && (h->root.type == bfd_link_hash_defweak
1238 || !h->def_regular)))
1240 struct elf_s390_dyn_relocs *p;
1241 struct elf_s390_dyn_relocs **head;
1243 /* We must copy these reloc types into the output file.
1244 Create a reloc section in dynobj and make room for
1248 if (htab->elf.dynobj == NULL)
1249 htab->elf.dynobj = abfd;
1251 sreloc = _bfd_elf_make_dynamic_reloc_section
1252 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1258 /* If this is a global symbol, we count the number of
1259 relocations we need for this symbol. */
1262 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1266 /* Track dynamic relocs needed for local syms too.
1267 We really need local syms available to do this
1271 Elf_Internal_Sym *isym;
1273 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1278 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1282 vpp = &elf_section_data (s)->local_dynrel;
1283 head = (struct elf_s390_dyn_relocs **) vpp;
1287 if (p == NULL || p->sec != sec)
1289 bfd_size_type amt = sizeof *p;
1290 p = ((struct elf_s390_dyn_relocs *)
1291 bfd_alloc (htab->elf.dynobj, amt));
1302 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1303 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1304 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1305 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1306 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1311 /* This relocation describes the C++ object vtable hierarchy.
1312 Reconstruct it for later use during GC. */
1313 case R_390_GNU_VTINHERIT:
1314 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1318 /* This relocation describes which C++ vtable entries are actually
1319 used. Record for later use during GC. */
1320 case R_390_GNU_VTENTRY:
1321 BFD_ASSERT (h != NULL);
1323 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1335 /* Return the section that should be marked against GC for a given
1339 elf_s390_gc_mark_hook (asection *sec,
1340 struct bfd_link_info *info,
1341 Elf_Internal_Rela *rel,
1342 struct elf_link_hash_entry *h,
1343 Elf_Internal_Sym *sym)
1346 switch (ELF64_R_TYPE (rel->r_info))
1348 case R_390_GNU_VTINHERIT:
1349 case R_390_GNU_VTENTRY:
1353 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1356 /* Update the got entry reference counts for the section being removed. */
1359 elf_s390_gc_sweep_hook (bfd *abfd,
1360 struct bfd_link_info *info,
1362 const Elf_Internal_Rela *relocs)
1364 struct elf_s390_link_hash_table *htab;
1365 Elf_Internal_Shdr *symtab_hdr;
1366 struct elf_link_hash_entry **sym_hashes;
1367 bfd_signed_vma *local_got_refcounts;
1368 const Elf_Internal_Rela *rel, *relend;
1370 if (info->relocatable)
1373 htab = elf_s390_hash_table (info);
1377 elf_section_data (sec)->local_dynrel = NULL;
1379 symtab_hdr = &elf_symtab_hdr (abfd);
1380 sym_hashes = elf_sym_hashes (abfd);
1381 local_got_refcounts = elf_local_got_refcounts (abfd);
1383 relend = relocs + sec->reloc_count;
1384 for (rel = relocs; rel < relend; rel++)
1386 unsigned long r_symndx;
1387 unsigned int r_type;
1388 struct elf_link_hash_entry *h = NULL;
1390 r_symndx = ELF64_R_SYM (rel->r_info);
1391 if (r_symndx >= symtab_hdr->sh_info)
1393 struct elf_s390_link_hash_entry *eh;
1394 struct elf_s390_dyn_relocs **pp;
1395 struct elf_s390_dyn_relocs *p;
1397 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1398 while (h->root.type == bfd_link_hash_indirect
1399 || h->root.type == bfd_link_hash_warning)
1400 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1401 eh = (struct elf_s390_link_hash_entry *) h;
1403 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1406 /* Everything must go for SEC. */
1412 r_type = ELF64_R_TYPE (rel->r_info);
1413 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1416 case R_390_TLS_LDM64:
1417 if (htab->tls_ldm_got.refcount > 0)
1418 htab->tls_ldm_got.refcount -= 1;
1421 case R_390_TLS_GD64:
1422 case R_390_TLS_IE64:
1423 case R_390_TLS_GOTIE12:
1424 case R_390_TLS_GOTIE20:
1425 case R_390_TLS_GOTIE64:
1426 case R_390_TLS_IEENT:
1432 case R_390_GOTOFF16:
1433 case R_390_GOTOFF32:
1434 case R_390_GOTOFF64:
1436 case R_390_GOTPCDBL:
1440 if (h->got.refcount > 0)
1441 h->got.refcount -= 1;
1443 else if (local_got_refcounts != NULL)
1445 if (local_got_refcounts[r_symndx] > 0)
1446 local_got_refcounts[r_symndx] -= 1;
1465 case R_390_PLT16DBL:
1467 case R_390_PLT32DBL:
1469 case R_390_PLTOFF16:
1470 case R_390_PLTOFF32:
1471 case R_390_PLTOFF64:
1474 if (h->plt.refcount > 0)
1475 h->plt.refcount -= 1;
1479 case R_390_GOTPLT12:
1480 case R_390_GOTPLT16:
1481 case R_390_GOTPLT20:
1482 case R_390_GOTPLT32:
1483 case R_390_GOTPLT64:
1484 case R_390_GOTPLTENT:
1487 if (h->plt.refcount > 0)
1489 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1490 h->plt.refcount -= 1;
1493 else if (local_got_refcounts != NULL)
1495 if (local_got_refcounts[r_symndx] > 0)
1496 local_got_refcounts[r_symndx] -= 1;
1508 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1509 entry but we found we will not create any. Called when we find we will
1510 not have any PLT for this symbol, by for example
1511 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1512 or elf_s390_size_dynamic_sections if no dynamic sections will be
1513 created (we're only linking static objects). */
1516 elf_s390_adjust_gotplt (h)
1517 struct elf_s390_link_hash_entry *h;
1519 if (h->elf.root.type == bfd_link_hash_warning)
1520 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1522 if (h->gotplt_refcount <= 0)
1525 /* We simply add the number of gotplt references to the number
1526 * of got references for this symbol. */
1527 h->elf.got.refcount += h->gotplt_refcount;
1528 h->gotplt_refcount = -1;
1531 /* Adjust a symbol defined by a dynamic object and referenced by a
1532 regular object. The current definition is in some section of the
1533 dynamic object, but we're not including those sections. We have to
1534 change the definition to something the rest of the link can
1538 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1539 struct elf_link_hash_entry *h)
1541 struct elf_s390_link_hash_table *htab;
1544 /* If this is a function, put it in the procedure linkage table. We
1545 will fill in the contents of the procedure linkage table later
1546 (although we could actually do it here). */
1547 if (h->type == STT_FUNC
1550 if (h->plt.refcount <= 0
1551 || SYMBOL_CALLS_LOCAL (info, h)
1552 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1553 && h->root.type == bfd_link_hash_undefweak))
1555 /* This case can occur if we saw a PLT32 reloc in an input
1556 file, but the symbol was never referred to by a dynamic
1557 object, or if all references were garbage collected. In
1558 such a case, we don't actually need to build a procedure
1559 linkage table, and we can just do a PC32 reloc instead. */
1560 h->plt.offset = (bfd_vma) -1;
1562 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1568 /* It's possible that we incorrectly decided a .plt reloc was
1569 needed for an R_390_PC32 reloc to a non-function sym in
1570 check_relocs. We can't decide accurately between function and
1571 non-function syms in check-relocs; Objects loaded later in
1572 the link may change h->type. So fix it now. */
1573 h->plt.offset = (bfd_vma) -1;
1575 /* If this is a weak symbol, and there is a real definition, the
1576 processor independent code will have arranged for us to see the
1577 real definition first, and we can just use the same value. */
1578 if (h->u.weakdef != NULL)
1580 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1581 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1582 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1583 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1584 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1585 h->non_got_ref = h->u.weakdef->non_got_ref;
1589 /* This is a reference to a symbol defined by a dynamic object which
1590 is not a function. */
1592 /* If we are creating a shared library, we must presume that the
1593 only references to the symbol are via the global offset table.
1594 For such cases we need not do anything here; the relocations will
1595 be handled correctly by relocate_section. */
1599 /* If there are no references to this symbol that do not use the
1600 GOT, we don't need to generate a copy reloc. */
1601 if (!h->non_got_ref)
1604 /* If -z nocopyreloc was given, we won't generate them either. */
1605 if (info->nocopyreloc)
1611 if (ELIMINATE_COPY_RELOCS)
1613 struct elf_s390_link_hash_entry * eh;
1614 struct elf_s390_dyn_relocs *p;
1616 eh = (struct elf_s390_link_hash_entry *) h;
1617 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1619 s = p->sec->output_section;
1620 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1624 /* If we didn't find any dynamic relocs in read-only sections, then
1625 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1633 /* We must allocate the symbol in our .dynbss section, which will
1634 become part of the .bss section of the executable. There will be
1635 an entry for this symbol in the .dynsym section. The dynamic
1636 object will contain position independent code, so all references
1637 from the dynamic object to this symbol will go through the global
1638 offset table. The dynamic linker will use the .dynsym entry to
1639 determine the address it must put in the global offset table, so
1640 both the dynamic object and the regular object will refer to the
1641 same memory location for the variable. */
1643 htab = elf_s390_hash_table (info);
1647 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1648 copy the initial value out of the dynamic object and into the
1649 runtime process image. */
1650 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1652 htab->srelbss->size += sizeof (Elf64_External_Rela);
1658 return _bfd_elf_adjust_dynamic_copy (h, s);
1661 /* Allocate space in .plt, .got and associated reloc sections for
1665 allocate_dynrelocs (struct elf_link_hash_entry *h,
1668 struct bfd_link_info *info;
1669 struct elf_s390_link_hash_table *htab;
1670 struct elf_s390_link_hash_entry *eh;
1671 struct elf_s390_dyn_relocs *p;
1673 if (h->root.type == bfd_link_hash_indirect)
1676 info = (struct bfd_link_info *) inf;
1677 htab = elf_s390_hash_table (info);
1681 if (htab->elf.dynamic_sections_created
1682 && h->plt.refcount > 0)
1684 /* Make sure this symbol is output as a dynamic symbol.
1685 Undefined weak syms won't yet be marked as dynamic. */
1686 if (h->dynindx == -1
1687 && !h->forced_local)
1689 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1694 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1696 asection *s = htab->splt;
1698 /* If this is the first .plt entry, make room for the special
1701 s->size += PLT_FIRST_ENTRY_SIZE;
1703 h->plt.offset = s->size;
1705 /* If this symbol is not defined in a regular file, and we are
1706 not generating a shared library, then set the symbol to this
1707 location in the .plt. This is required to make function
1708 pointers compare as equal between the normal executable and
1709 the shared library. */
1713 h->root.u.def.section = s;
1714 h->root.u.def.value = h->plt.offset;
1717 /* Make room for this entry. */
1718 s->size += PLT_ENTRY_SIZE;
1720 /* We also need to make an entry in the .got.plt section, which
1721 will be placed in the .got section by the linker script. */
1722 htab->sgotplt->size += GOT_ENTRY_SIZE;
1724 /* We also need to make an entry in the .rela.plt section. */
1725 htab->srelplt->size += sizeof (Elf64_External_Rela);
1729 h->plt.offset = (bfd_vma) -1;
1731 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1736 h->plt.offset = (bfd_vma) -1;
1738 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1741 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1742 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1743 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1744 we can save the dynamic TLS relocation. */
1745 if (h->got.refcount > 0
1748 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1750 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1751 /* For the GOTIE access without a literal pool entry the offset has
1752 to be stored somewhere. The immediate value in the instruction
1753 is not bit enough so the value is stored in the got. */
1755 h->got.offset = htab->sgot->size;
1756 htab->sgot->size += GOT_ENTRY_SIZE;
1759 h->got.offset = (bfd_vma) -1;
1761 else if (h->got.refcount > 0)
1765 int tls_type = elf_s390_hash_entry(h)->tls_type;
1767 /* Make sure this symbol is output as a dynamic symbol.
1768 Undefined weak syms won't yet be marked as dynamic. */
1769 if (h->dynindx == -1
1770 && !h->forced_local)
1772 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1777 h->got.offset = s->size;
1778 s->size += GOT_ENTRY_SIZE;
1779 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1780 if (tls_type == GOT_TLS_GD)
1781 s->size += GOT_ENTRY_SIZE;
1782 dyn = htab->elf.dynamic_sections_created;
1783 /* R_390_TLS_IE64 needs one dynamic relocation,
1784 R_390_TLS_GD64 needs one if local symbol and two if global. */
1785 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1786 || tls_type >= GOT_TLS_IE)
1787 htab->srelgot->size += sizeof (Elf64_External_Rela);
1788 else if (tls_type == GOT_TLS_GD)
1789 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1790 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1791 || h->root.type != bfd_link_hash_undefweak)
1793 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1794 htab->srelgot->size += sizeof (Elf64_External_Rela);
1797 h->got.offset = (bfd_vma) -1;
1799 eh = (struct elf_s390_link_hash_entry *) h;
1800 if (eh->dyn_relocs == NULL)
1803 /* In the shared -Bsymbolic case, discard space allocated for
1804 dynamic pc-relative relocs against symbols which turn out to be
1805 defined in regular objects. For the normal shared case, discard
1806 space for pc-relative relocs that have become local due to symbol
1807 visibility changes. */
1811 if (SYMBOL_CALLS_LOCAL (info, h))
1813 struct elf_s390_dyn_relocs **pp;
1815 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1817 p->count -= p->pc_count;
1826 /* Also discard relocs on undefined weak syms with non-default
1828 if (eh->dyn_relocs != NULL
1829 && h->root.type == bfd_link_hash_undefweak)
1831 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1832 eh->dyn_relocs = NULL;
1834 /* Make sure undefined weak symbols are output as a dynamic
1836 else if (h->dynindx == -1
1837 && !h->forced_local)
1839 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1844 else if (ELIMINATE_COPY_RELOCS)
1846 /* For the non-shared case, discard space for relocs against
1847 symbols which turn out to need copy relocs or are not
1853 || (htab->elf.dynamic_sections_created
1854 && (h->root.type == bfd_link_hash_undefweak
1855 || h->root.type == bfd_link_hash_undefined))))
1857 /* Make sure this symbol is output as a dynamic symbol.
1858 Undefined weak syms won't yet be marked as dynamic. */
1859 if (h->dynindx == -1
1860 && !h->forced_local)
1862 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1866 /* If that succeeded, we know we'll be keeping all the
1868 if (h->dynindx != -1)
1872 eh->dyn_relocs = NULL;
1877 /* Finally, allocate space. */
1878 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1880 asection *sreloc = elf_section_data (p->sec)->sreloc;
1881 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1887 /* Find any dynamic relocs that apply to read-only sections. */
1890 readonly_dynrelocs (h, inf)
1891 struct elf_link_hash_entry *h;
1894 struct elf_s390_link_hash_entry *eh;
1895 struct elf_s390_dyn_relocs *p;
1897 eh = (struct elf_s390_link_hash_entry *) h;
1898 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1900 asection *s = p->sec->output_section;
1902 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1904 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1906 info->flags |= DF_TEXTREL;
1908 /* Not an error, just cut short the traversal. */
1915 /* Set the sizes of the dynamic sections. */
1918 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1919 struct bfd_link_info *info)
1921 struct elf_s390_link_hash_table *htab;
1927 htab = elf_s390_hash_table (info);
1931 dynobj = htab->elf.dynobj;
1935 if (htab->elf.dynamic_sections_created)
1937 /* Set the contents of the .interp section to the interpreter. */
1938 if (info->executable)
1940 s = bfd_get_section_by_name (dynobj, ".interp");
1943 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1944 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1948 /* Set up .got offsets for local syms, and space for local dynamic
1950 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1952 bfd_signed_vma *local_got;
1953 bfd_signed_vma *end_local_got;
1954 char *local_tls_type;
1955 bfd_size_type locsymcount;
1956 Elf_Internal_Shdr *symtab_hdr;
1959 if (! is_s390_elf (ibfd))
1962 for (s = ibfd->sections; s != NULL; s = s->next)
1964 struct elf_s390_dyn_relocs *p;
1966 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1968 if (!bfd_is_abs_section (p->sec)
1969 && bfd_is_abs_section (p->sec->output_section))
1971 /* Input section has been discarded, either because
1972 it is a copy of a linkonce section or due to
1973 linker script /DISCARD/, so we'll be discarding
1976 else if (p->count != 0)
1978 srela = elf_section_data (p->sec)->sreloc;
1979 srela->size += p->count * sizeof (Elf64_External_Rela);
1980 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1981 info->flags |= DF_TEXTREL;
1986 local_got = elf_local_got_refcounts (ibfd);
1990 symtab_hdr = &elf_symtab_hdr (ibfd);
1991 locsymcount = symtab_hdr->sh_info;
1992 end_local_got = local_got + locsymcount;
1993 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1995 srela = htab->srelgot;
1996 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2000 *local_got = s->size;
2001 s->size += GOT_ENTRY_SIZE;
2002 if (*local_tls_type == GOT_TLS_GD)
2003 s->size += GOT_ENTRY_SIZE;
2005 srela->size += sizeof (Elf64_External_Rela);
2008 *local_got = (bfd_vma) -1;
2012 if (htab->tls_ldm_got.refcount > 0)
2014 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2016 htab->tls_ldm_got.offset = htab->sgot->size;
2017 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2018 htab->srelgot->size += sizeof (Elf64_External_Rela);
2021 htab->tls_ldm_got.offset = -1;
2023 /* Allocate global sym .plt and .got entries, and space for global
2024 sym dynamic relocs. */
2025 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2027 /* We now have determined the sizes of the various dynamic sections.
2028 Allocate memory for them. */
2030 for (s = dynobj->sections; s != NULL; s = s->next)
2032 if ((s->flags & SEC_LINKER_CREATED) == 0)
2037 || s == htab->sgotplt
2038 || s == htab->sdynbss)
2040 /* Strip this section if we don't need it; see the
2043 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2045 if (s->size != 0 && s != htab->srelplt)
2048 /* We use the reloc_count field as a counter if we need
2049 to copy relocs into the output file. */
2054 /* It's not one of our sections, so don't allocate space. */
2060 /* If we don't need this section, strip it from the
2061 output file. This is to handle .rela.bss and
2062 .rela.plt. We must create it in
2063 create_dynamic_sections, because it must be created
2064 before the linker maps input sections to output
2065 sections. The linker does that before
2066 adjust_dynamic_symbol is called, and it is that
2067 function which decides whether anything needs to go
2068 into these sections. */
2070 s->flags |= SEC_EXCLUDE;
2074 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2077 /* Allocate memory for the section contents. We use bfd_zalloc
2078 here in case unused entries are not reclaimed before the
2079 section's contents are written out. This should not happen,
2080 but this way if it does, we get a R_390_NONE reloc instead
2082 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2083 if (s->contents == NULL)
2087 if (htab->elf.dynamic_sections_created)
2089 /* Add some entries to the .dynamic section. We fill in the
2090 values later, in elf_s390_finish_dynamic_sections, but we
2091 must add the entries now so that we get the correct size for
2092 the .dynamic section. The DT_DEBUG entry is filled in by the
2093 dynamic linker and used by the debugger. */
2094 #define add_dynamic_entry(TAG, VAL) \
2095 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2097 if (info->executable)
2099 if (!add_dynamic_entry (DT_DEBUG, 0))
2103 if (htab->splt->size != 0)
2105 if (!add_dynamic_entry (DT_PLTGOT, 0)
2106 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2107 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2108 || !add_dynamic_entry (DT_JMPREL, 0))
2114 if (!add_dynamic_entry (DT_RELA, 0)
2115 || !add_dynamic_entry (DT_RELASZ, 0)
2116 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2119 /* If any dynamic relocs apply to a read-only section,
2120 then we need a DT_TEXTREL entry. */
2121 if ((info->flags & DF_TEXTREL) == 0)
2122 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2125 if ((info->flags & DF_TEXTREL) != 0)
2127 if (!add_dynamic_entry (DT_TEXTREL, 0))
2132 #undef add_dynamic_entry
2137 /* Return the base VMA address which should be subtracted from real addresses
2138 when resolving @dtpoff relocation.
2139 This is PT_TLS segment p_vaddr. */
2143 struct bfd_link_info *info;
2145 /* If tls_sec is NULL, we should have signalled an error already. */
2146 if (elf_hash_table (info)->tls_sec == NULL)
2148 return elf_hash_table (info)->tls_sec->vma;
2151 /* Return the relocation value for @tpoff relocation
2152 if STT_TLS virtual address is ADDRESS. */
2155 tpoff (info, address)
2156 struct bfd_link_info *info;
2159 struct elf_link_hash_table *htab = elf_hash_table (info);
2161 /* If tls_sec is NULL, we should have signalled an error already. */
2162 if (htab->tls_sec == NULL)
2164 return htab->tls_size + htab->tls_sec->vma - address;
2167 /* Complain if TLS instruction relocation is against an invalid
2171 invalid_tls_insn (input_bfd, input_section, rel)
2173 asection *input_section;
2174 Elf_Internal_Rela *rel;
2176 reloc_howto_type *howto;
2178 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2179 (*_bfd_error_handler)
2180 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2183 (long) rel->r_offset,
2185 bfd_set_error (bfd_error_bad_value);
2188 /* Relocate a 390 ELF section. */
2191 elf_s390_relocate_section (bfd *output_bfd,
2192 struct bfd_link_info *info,
2194 asection *input_section,
2196 Elf_Internal_Rela *relocs,
2197 Elf_Internal_Sym *local_syms,
2198 asection **local_sections)
2200 struct elf_s390_link_hash_table *htab;
2201 Elf_Internal_Shdr *symtab_hdr;
2202 struct elf_link_hash_entry **sym_hashes;
2203 bfd_vma *local_got_offsets;
2204 Elf_Internal_Rela *rel;
2205 Elf_Internal_Rela *relend;
2207 BFD_ASSERT (is_s390_elf (input_bfd));
2209 htab = elf_s390_hash_table (info);
2213 symtab_hdr = &elf_symtab_hdr (input_bfd);
2214 sym_hashes = elf_sym_hashes (input_bfd);
2215 local_got_offsets = elf_local_got_offsets (input_bfd);
2218 relend = relocs + input_section->reloc_count;
2219 for (; rel < relend; rel++)
2221 unsigned int r_type;
2222 reloc_howto_type *howto;
2223 unsigned long r_symndx;
2224 struct elf_link_hash_entry *h;
2225 Elf_Internal_Sym *sym;
2229 bfd_boolean unresolved_reloc;
2230 bfd_reloc_status_type r;
2233 r_type = ELF64_R_TYPE (rel->r_info);
2234 if (r_type == (int) R_390_GNU_VTINHERIT
2235 || r_type == (int) R_390_GNU_VTENTRY)
2237 if (r_type >= (int) R_390_max)
2239 bfd_set_error (bfd_error_bad_value);
2243 howto = elf_howto_table + r_type;
2244 r_symndx = ELF64_R_SYM (rel->r_info);
2249 unresolved_reloc = FALSE;
2250 if (r_symndx < symtab_hdr->sh_info)
2252 sym = local_syms + r_symndx;
2253 sec = local_sections[r_symndx];
2254 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2258 bfd_boolean warned ATTRIBUTE_UNUSED;
2260 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2261 r_symndx, symtab_hdr, sym_hashes,
2263 unresolved_reloc, warned);
2266 if (sec != NULL && elf_discarded_section (sec))
2267 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2268 rel, relend, howto, contents);
2270 if (info->relocatable)
2275 case R_390_GOTPLT12:
2276 case R_390_GOTPLT16:
2277 case R_390_GOTPLT20:
2278 case R_390_GOTPLT32:
2279 case R_390_GOTPLT64:
2280 case R_390_GOTPLTENT:
2281 /* There are three cases for a GOTPLT relocation. 1) The
2282 relocation is against the jump slot entry of a plt that
2283 will get emitted to the output file. 2) The relocation
2284 is against the jump slot of a plt entry that has been
2285 removed. elf_s390_adjust_gotplt has created a GOT entry
2286 as replacement. 3) The relocation is against a local symbol.
2287 Cases 2) and 3) are the same as the GOT relocation code
2288 so we just have to test for case 1 and fall through for
2290 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2295 Current offset - size first entry / entry size. */
2296 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2299 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2301 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2302 unresolved_reloc = FALSE;
2304 if (r_type == R_390_GOTPLTENT)
2305 relocation += htab->sgot->output_section->vma;
2316 /* Relocation is to the entry for this symbol in the global
2318 if (htab->sgot == NULL)
2325 off = h->got.offset;
2326 dyn = htab->elf.dynamic_sections_created;
2327 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2329 && SYMBOL_REFERENCES_LOCAL (info, h))
2330 || (ELF_ST_VISIBILITY (h->other)
2331 && h->root.type == bfd_link_hash_undefweak))
2333 /* This is actually a static link, or it is a
2334 -Bsymbolic link and the symbol is defined
2335 locally, or the symbol was forced to be local
2336 because of a version file. We must initialize
2337 this entry in the global offset table. Since the
2338 offset must always be a multiple of 2, we use the
2339 least significant bit to record whether we have
2340 initialized it already.
2342 When doing a dynamic link, we create a .rel.got
2343 relocation entry to initialize the value. This
2344 is done in the finish_dynamic_symbol routine. */
2349 bfd_put_64 (output_bfd, relocation,
2350 htab->sgot->contents + off);
2355 unresolved_reloc = FALSE;
2359 if (local_got_offsets == NULL)
2362 off = local_got_offsets[r_symndx];
2364 /* The offset must always be a multiple of 8. We use
2365 the least significant bit to record whether we have
2366 already generated the necessary reloc. */
2371 bfd_put_64 (output_bfd, relocation,
2372 htab->sgot->contents + off);
2377 Elf_Internal_Rela outrel;
2384 outrel.r_offset = (htab->sgot->output_section->vma
2385 + htab->sgot->output_offset
2387 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2388 outrel.r_addend = relocation;
2390 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2391 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2394 local_got_offsets[r_symndx] |= 1;
2398 if (off >= (bfd_vma) -2)
2401 relocation = htab->sgot->output_offset + off;
2403 /* For @GOTENT the relocation is against the offset between
2404 the instruction and the symbols entry in the GOT and not
2405 between the start of the GOT and the symbols entry. We
2406 add the vma of the GOT to get the correct value. */
2407 if ( r_type == R_390_GOTENT
2408 || r_type == R_390_GOTPLTENT)
2409 relocation += htab->sgot->output_section->vma;
2413 case R_390_GOTOFF16:
2414 case R_390_GOTOFF32:
2415 case R_390_GOTOFF64:
2416 /* Relocation is relative to the start of the global offset
2419 /* Note that sgot->output_offset is not involved in this
2420 calculation. We always want the start of .got. If we
2421 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2422 permitted by the ABI, we might have to change this
2424 relocation -= htab->sgot->output_section->vma;
2428 case R_390_GOTPCDBL:
2429 /* Use global offset table as symbol value. */
2430 relocation = htab->sgot->output_section->vma;
2431 unresolved_reloc = FALSE;
2434 case R_390_PLT16DBL:
2436 case R_390_PLT32DBL:
2438 /* Relocation is to the entry for this symbol in the
2439 procedure linkage table. */
2441 /* Resolve a PLT32 reloc against a local symbol directly,
2442 without using the procedure linkage table. */
2446 if (h->plt.offset == (bfd_vma) -1
2447 || htab->splt == NULL)
2449 /* We didn't make a PLT entry for this symbol. This
2450 happens when statically linking PIC code, or when
2451 using -Bsymbolic. */
2455 relocation = (htab->splt->output_section->vma
2456 + htab->splt->output_offset
2458 unresolved_reloc = FALSE;
2461 case R_390_PLTOFF16:
2462 case R_390_PLTOFF32:
2463 case R_390_PLTOFF64:
2464 /* Relocation is to the entry for this symbol in the
2465 procedure linkage table relative to the start of the GOT. */
2467 /* For local symbols or if we didn't make a PLT entry for
2468 this symbol resolve the symbol directly. */
2470 || h->plt.offset == (bfd_vma) -1
2471 || htab->splt == NULL)
2473 relocation -= htab->sgot->output_section->vma;
2477 relocation = (htab->splt->output_section->vma
2478 + htab->splt->output_offset
2480 - htab->sgot->output_section->vma);
2481 unresolved_reloc = FALSE;
2493 if ((input_section->flags & SEC_ALLOC) == 0)
2498 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2499 || h->root.type != bfd_link_hash_undefweak)
2500 && ((r_type != R_390_PC16
2501 && r_type != R_390_PC16DBL
2502 && r_type != R_390_PC32
2503 && r_type != R_390_PC32DBL
2504 && r_type != R_390_PC64)
2505 || !SYMBOL_CALLS_LOCAL (info, h)))
2506 || (ELIMINATE_COPY_RELOCS
2513 || h->root.type == bfd_link_hash_undefweak
2514 || h->root.type == bfd_link_hash_undefined)))
2516 Elf_Internal_Rela outrel;
2517 bfd_boolean skip, relocate;
2521 /* When generating a shared object, these relocations
2522 are copied into the output file to be resolved at run
2528 _bfd_elf_section_offset (output_bfd, info, input_section,
2530 if (outrel.r_offset == (bfd_vma) -1)
2532 else if (outrel.r_offset == (bfd_vma) -2)
2533 skip = TRUE, relocate = TRUE;
2535 outrel.r_offset += (input_section->output_section->vma
2536 + input_section->output_offset);
2539 memset (&outrel, 0, sizeof outrel);
2542 && (r_type == R_390_PC16
2543 || r_type == R_390_PC16DBL
2544 || r_type == R_390_PC32
2545 || r_type == R_390_PC32DBL
2546 || r_type == R_390_PC64
2548 || !SYMBOLIC_BIND (info, h)
2549 || !h->def_regular))
2551 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2552 outrel.r_addend = rel->r_addend;
2556 /* This symbol is local, or marked to become local. */
2557 outrel.r_addend = relocation + rel->r_addend;
2558 if (r_type == R_390_64)
2561 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2567 if (bfd_is_abs_section (sec))
2569 else if (sec == NULL || sec->owner == NULL)
2571 bfd_set_error(bfd_error_bad_value);
2578 osec = sec->output_section;
2579 sindx = elf_section_data (osec)->dynindx;
2583 osec = htab->elf.text_index_section;
2584 sindx = elf_section_data (osec)->dynindx;
2586 BFD_ASSERT (sindx != 0);
2588 /* We are turning this relocation into one
2589 against a section symbol, so subtract out
2590 the output section's address but not the
2591 offset of the input section in the output
2593 outrel.r_addend -= osec->vma;
2595 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2599 sreloc = elf_section_data (input_section)->sreloc;
2603 loc = sreloc->contents;
2604 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2605 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2607 /* If this reloc is against an external symbol, we do
2608 not want to fiddle with the addend. Otherwise, we
2609 need to include the symbol value so that it becomes
2610 an addend for the dynamic reloc. */
2617 /* Relocations for tls literal pool entries. */
2618 case R_390_TLS_IE64:
2621 Elf_Internal_Rela outrel;
2625 outrel.r_offset = rel->r_offset
2626 + input_section->output_section->vma
2627 + input_section->output_offset;
2628 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2629 sreloc = elf_section_data (input_section)->sreloc;
2632 loc = sreloc->contents;
2633 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2634 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2638 case R_390_TLS_GD64:
2639 case R_390_TLS_GOTIE64:
2640 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2641 tls_type = GOT_UNKNOWN;
2642 if (h == NULL && local_got_offsets)
2643 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2646 tls_type = elf_s390_hash_entry(h)->tls_type;
2647 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2648 r_type = R_390_TLS_LE64;
2650 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2651 r_type = R_390_TLS_IE64;
2653 if (r_type == R_390_TLS_LE64)
2655 /* This relocation gets optimized away by the local exec
2656 access optimization. */
2657 BFD_ASSERT (! unresolved_reloc);
2658 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2659 contents + rel->r_offset);
2663 if (htab->sgot == NULL)
2667 off = h->got.offset;
2670 if (local_got_offsets == NULL)
2673 off = local_got_offsets[r_symndx];
2682 Elf_Internal_Rela outrel;
2686 if (htab->srelgot == NULL)
2689 outrel.r_offset = (htab->sgot->output_section->vma
2690 + htab->sgot->output_offset + off);
2692 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2693 if (r_type == R_390_TLS_GD64)
2694 dr_type = R_390_TLS_DTPMOD;
2696 dr_type = R_390_TLS_TPOFF;
2697 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2698 outrel.r_addend = relocation - dtpoff_base (info);
2700 outrel.r_addend = 0;
2701 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2702 loc = htab->srelgot->contents;
2703 loc += htab->srelgot->reloc_count++
2704 * sizeof (Elf64_External_Rela);
2705 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2707 if (r_type == R_390_TLS_GD64)
2711 BFD_ASSERT (! unresolved_reloc);
2712 bfd_put_64 (output_bfd,
2713 relocation - dtpoff_base (info),
2714 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2718 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2719 outrel.r_offset += GOT_ENTRY_SIZE;
2720 outrel.r_addend = 0;
2721 htab->srelgot->reloc_count++;
2722 loc += sizeof (Elf64_External_Rela);
2723 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2730 local_got_offsets[r_symndx] |= 1;
2733 if (off >= (bfd_vma) -2)
2735 if (r_type == ELF64_R_TYPE (rel->r_info))
2737 relocation = htab->sgot->output_offset + off;
2738 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2739 relocation += htab->sgot->output_section->vma;
2740 unresolved_reloc = FALSE;
2744 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2745 contents + rel->r_offset);
2750 case R_390_TLS_GOTIE12:
2751 case R_390_TLS_GOTIE20:
2752 case R_390_TLS_IEENT:
2755 if (local_got_offsets == NULL)
2757 off = local_got_offsets[r_symndx];
2759 goto emit_tls_relocs;
2763 off = h->got.offset;
2764 tls_type = elf_s390_hash_entry(h)->tls_type;
2765 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2766 goto emit_tls_relocs;
2769 if (htab->sgot == NULL)
2772 BFD_ASSERT (! unresolved_reloc);
2773 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2774 htab->sgot->contents + off);
2775 relocation = htab->sgot->output_offset + off;
2776 if (r_type == R_390_TLS_IEENT)
2777 relocation += htab->sgot->output_section->vma;
2778 unresolved_reloc = FALSE;
2781 case R_390_TLS_LDM64:
2783 /* The literal pool entry this relocation refers to gets ignored
2784 by the optimized code of the local exec model. Do nothing
2785 and the value will turn out zero. */
2788 if (htab->sgot == NULL)
2791 off = htab->tls_ldm_got.offset;
2796 Elf_Internal_Rela outrel;
2799 if (htab->srelgot == NULL)
2802 outrel.r_offset = (htab->sgot->output_section->vma
2803 + htab->sgot->output_offset + off);
2805 bfd_put_64 (output_bfd, 0,
2806 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2807 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2808 outrel.r_addend = 0;
2809 loc = htab->srelgot->contents;
2810 loc += htab->srelgot->reloc_count++
2811 * sizeof (Elf64_External_Rela);
2812 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2813 htab->tls_ldm_got.offset |= 1;
2815 relocation = htab->sgot->output_offset + off;
2816 unresolved_reloc = FALSE;
2819 case R_390_TLS_LE64:
2822 /* Linking a shared library with non-fpic code requires
2823 a R_390_TLS_TPOFF relocation. */
2824 Elf_Internal_Rela outrel;
2829 outrel.r_offset = rel->r_offset
2830 + input_section->output_section->vma
2831 + input_section->output_offset;
2832 if (h != NULL && h->dynindx != -1)
2836 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2838 outrel.r_addend = relocation - dtpoff_base (info);
2840 outrel.r_addend = 0;
2841 sreloc = elf_section_data (input_section)->sreloc;
2844 loc = sreloc->contents;
2845 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2846 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2850 BFD_ASSERT (! unresolved_reloc);
2851 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2852 contents + rel->r_offset);
2856 case R_390_TLS_LDO64:
2857 if (info->shared || (input_section->flags & SEC_DEBUGGING))
2858 relocation -= dtpoff_base (info);
2860 /* When converting LDO to LE, we must negate. */
2861 relocation = -tpoff (info, relocation);
2864 /* Relocations for tls instructions. */
2865 case R_390_TLS_LOAD:
2866 case R_390_TLS_GDCALL:
2867 case R_390_TLS_LDCALL:
2868 tls_type = GOT_UNKNOWN;
2869 if (h == NULL && local_got_offsets)
2870 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2872 tls_type = elf_s390_hash_entry(h)->tls_type;
2874 if (tls_type == GOT_TLS_GD)
2877 if (r_type == R_390_TLS_LOAD)
2879 if (!info->shared && (h == NULL || h->dynindx == -1))
2881 /* IE->LE transition. Four valid cases:
2882 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2883 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2884 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2885 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2886 unsigned int insn0, insn1, ry;
2888 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2889 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2890 if (insn1 != 0x0004)
2891 invalid_tls_insn (input_bfd, input_section, rel);
2893 if ((insn0 & 0xff00f000) == 0xe3000000)
2894 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2895 ry = (insn0 & 0x000f0000);
2896 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2897 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2898 ry = (insn0 & 0x0000f000) << 4;
2899 else if ((insn0 & 0xff00f000) == 0xe300c000)
2900 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2901 ry = (insn0 & 0x000f0000);
2902 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2903 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2904 ry = (insn0 & 0x0000f000) << 4;
2906 invalid_tls_insn (input_bfd, input_section, rel);
2907 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2909 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2910 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2913 else if (r_type == R_390_TLS_GDCALL)
2915 unsigned int insn0, insn1;
2917 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2918 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2919 if ((insn0 & 0xffff0000) != 0xc0e50000)
2920 invalid_tls_insn (input_bfd, input_section, rel);
2921 if (!info->shared && (h == NULL || h->dynindx == -1))
2923 /* GD->LE transition.
2924 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2930 /* GD->IE transition.
2931 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2935 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2936 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2938 else if (r_type == R_390_TLS_LDCALL)
2942 unsigned int insn0, insn1;
2944 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2945 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2946 if ((insn0 & 0xffff0000) != 0xc0e50000)
2947 invalid_tls_insn (input_bfd, input_section, rel);
2948 /* LD->LE transition.
2949 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2952 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2953 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2962 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2963 because such sections are not SEC_ALLOC and thus ld.so will
2964 not process them. */
2965 if (unresolved_reloc
2966 && !((input_section->flags & SEC_DEBUGGING) != 0
2968 && _bfd_elf_section_offset (output_bfd, info, input_section,
2969 rel->r_offset) != (bfd_vma) -1)
2970 (*_bfd_error_handler)
2971 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
2974 (long) rel->r_offset,
2976 h->root.root.string);
2978 if (r_type == R_390_20
2979 || r_type == R_390_GOT20
2980 || r_type == R_390_GOTPLT20
2981 || r_type == R_390_TLS_GOTIE20)
2983 relocation += rel->r_addend;
2984 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
2985 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2986 contents, rel->r_offset,
2990 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2991 contents, rel->r_offset,
2992 relocation, rel->r_addend);
2994 if (r != bfd_reloc_ok)
2999 name = h->root.root.string;
3002 name = bfd_elf_string_from_elf_section (input_bfd,
3003 symtab_hdr->sh_link,
3008 name = bfd_section_name (input_bfd, sec);
3011 if (r == bfd_reloc_overflow)
3014 if (! ((*info->callbacks->reloc_overflow)
3015 (info, (h ? &h->root : NULL), name, howto->name,
3016 (bfd_vma) 0, input_bfd, input_section,
3022 (*_bfd_error_handler)
3023 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3024 input_bfd, input_section,
3025 (long) rel->r_offset, name, (int) r);
3034 /* Finish up dynamic symbol handling. We set the contents of various
3035 dynamic sections here. */
3038 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3039 struct bfd_link_info *info,
3040 struct elf_link_hash_entry *h,
3041 Elf_Internal_Sym *sym)
3043 struct elf_s390_link_hash_table *htab;
3045 htab = elf_s390_hash_table (info);
3049 if (h->plt.offset != (bfd_vma) -1)
3053 Elf_Internal_Rela rela;
3056 /* This symbol has an entry in the procedure linkage table. Set
3059 if (h->dynindx == -1
3060 || htab->splt == NULL
3061 || htab->sgotplt == NULL
3062 || htab->srelplt == NULL)
3066 Current offset - size first entry / entry size. */
3067 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3069 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3071 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3073 /* Fill in the blueprint of a PLT. */
3074 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3075 htab->splt->contents + h->plt.offset);
3076 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3077 htab->splt->contents + h->plt.offset + 4);
3078 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3079 htab->splt->contents + h->plt.offset + 8);
3080 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3081 htab->splt->contents + h->plt.offset + 12);
3082 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3083 htab->splt->contents + h->plt.offset + 16);
3084 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3085 htab->splt->contents + h->plt.offset + 20);
3086 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3087 htab->splt->contents + h->plt.offset + 24);
3088 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3089 htab->splt->contents + h->plt.offset + 28);
3090 /* Fixup the relative address to the GOT entry */
3091 bfd_put_32 (output_bfd,
3092 (htab->sgotplt->output_section->vma +
3093 htab->sgotplt->output_offset + got_offset
3094 - (htab->splt->output_section->vma + h->plt.offset))/2,
3095 htab->splt->contents + h->plt.offset + 2);
3096 /* Fixup the relative branch to PLT 0 */
3097 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3098 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3099 htab->splt->contents + h->plt.offset + 24);
3100 /* Fixup offset into symbol table */
3101 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3102 htab->splt->contents + h->plt.offset + 28);
3104 /* Fill in the entry in the global offset table.
3105 Points to instruction after GOT offset. */
3106 bfd_put_64 (output_bfd,
3107 (htab->splt->output_section->vma
3108 + htab->splt->output_offset
3111 htab->sgotplt->contents + got_offset);
3113 /* Fill in the entry in the .rela.plt section. */
3114 rela.r_offset = (htab->sgotplt->output_section->vma
3115 + htab->sgotplt->output_offset
3117 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3119 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3120 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3122 if (!h->def_regular)
3124 /* Mark the symbol as undefined, rather than as defined in
3125 the .plt section. Leave the value alone. This is a clue
3126 for the dynamic linker, to make function pointer
3127 comparisons work between an application and shared
3129 sym->st_shndx = SHN_UNDEF;
3133 if (h->got.offset != (bfd_vma) -1
3134 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3135 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3136 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3138 Elf_Internal_Rela rela;
3141 /* This symbol has an entry in the global offset table. Set it
3143 if (htab->sgot == NULL || htab->srelgot == NULL)
3146 rela.r_offset = (htab->sgot->output_section->vma
3147 + htab->sgot->output_offset
3148 + (h->got.offset &~ (bfd_vma) 1));
3150 /* If this is a static link, or it is a -Bsymbolic link and the
3151 symbol is defined locally or was forced to be local because
3152 of a version file, we just want to emit a RELATIVE reloc.
3153 The entry in the global offset table will already have been
3154 initialized in the relocate_section function. */
3156 && SYMBOL_REFERENCES_LOCAL (info, h))
3158 if (!h->def_regular)
3160 BFD_ASSERT((h->got.offset & 1) != 0);
3161 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3162 rela.r_addend = (h->root.u.def.value
3163 + h->root.u.def.section->output_section->vma
3164 + h->root.u.def.section->output_offset);
3168 BFD_ASSERT((h->got.offset & 1) == 0);
3169 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3170 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3174 loc = htab->srelgot->contents;
3175 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3176 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3181 Elf_Internal_Rela rela;
3184 /* This symbols needs a copy reloc. Set it up. */
3186 if (h->dynindx == -1
3187 || (h->root.type != bfd_link_hash_defined
3188 && h->root.type != bfd_link_hash_defweak)
3189 || htab->srelbss == NULL)
3192 rela.r_offset = (h->root.u.def.value
3193 + h->root.u.def.section->output_section->vma
3194 + h->root.u.def.section->output_offset);
3195 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3197 loc = htab->srelbss->contents;
3198 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3199 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3202 /* Mark some specially defined symbols as absolute. */
3203 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3204 || h == htab->elf.hgot
3205 || h == htab->elf.hplt)
3206 sym->st_shndx = SHN_ABS;
3211 /* Used to decide how to sort relocs in an optimal manner for the
3212 dynamic linker, before writing them out. */
3214 static enum elf_reloc_type_class
3215 elf_s390_reloc_type_class (rela)
3216 const Elf_Internal_Rela *rela;
3218 switch ((int) ELF64_R_TYPE (rela->r_info))
3220 case R_390_RELATIVE:
3221 return reloc_class_relative;
3222 case R_390_JMP_SLOT:
3223 return reloc_class_plt;
3225 return reloc_class_copy;
3227 return reloc_class_normal;
3231 /* Finish up the dynamic sections. */
3234 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3235 struct bfd_link_info *info)
3237 struct elf_s390_link_hash_table *htab;
3241 htab = elf_s390_hash_table (info);
3245 dynobj = htab->elf.dynobj;
3246 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3248 if (htab->elf.dynamic_sections_created)
3250 Elf64_External_Dyn *dyncon, *dynconend;
3252 if (sdyn == NULL || htab->sgot == NULL)
3255 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3256 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3257 for (; dyncon < dynconend; dyncon++)
3259 Elf_Internal_Dyn dyn;
3262 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3270 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3274 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3278 s = htab->srelplt->output_section;
3279 dyn.d_un.d_val = s->size;
3283 /* The procedure linkage table relocs (DT_JMPREL) should
3284 not be included in the overall relocs (DT_RELA).
3285 Therefore, we override the DT_RELASZ entry here to
3286 make it not include the JMPREL relocs. Since the
3287 linker script arranges for .rela.plt to follow all
3288 other relocation sections, we don't have to worry
3289 about changing the DT_RELA entry. */
3290 s = htab->srelplt->output_section;
3291 dyn.d_un.d_val -= s->size;
3295 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3298 /* Fill in the special first entry in the procedure linkage table. */
3299 if (htab->splt && htab->splt->size > 0)
3301 /* fill in blueprint for plt 0 entry */
3302 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3303 htab->splt->contents );
3304 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3305 htab->splt->contents +4 );
3306 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3307 htab->splt->contents +12 );
3308 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3309 htab->splt->contents +16 );
3310 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3311 htab->splt->contents +20 );
3312 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3313 htab->splt->contents + 24);
3314 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3315 htab->splt->contents + 28 );
3316 /* Fixup relative address to start of GOT */
3317 bfd_put_32 (output_bfd,
3318 (htab->sgotplt->output_section->vma +
3319 htab->sgotplt->output_offset
3320 - htab->splt->output_section->vma - 6)/2,
3321 htab->splt->contents + 8);
3323 elf_section_data (htab->splt->output_section)
3324 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3329 /* Fill in the first three entries in the global offset table. */
3330 if (htab->sgotplt->size > 0)
3332 bfd_put_64 (output_bfd,
3333 (sdyn == NULL ? (bfd_vma) 0
3334 : sdyn->output_section->vma + sdyn->output_offset),
3335 htab->sgotplt->contents);
3336 /* One entry for shared object struct ptr. */
3337 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3338 /* One entry for _dl_runtime_resolve. */
3339 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3342 elf_section_data (htab->sgot->output_section)
3343 ->this_hdr.sh_entsize = 8;
3348 /* Return address for Ith PLT stub in section PLT, for relocation REL
3349 or (bfd_vma) -1 if it should not be included. */
3352 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3353 const arelent *rel ATTRIBUTE_UNUSED)
3355 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3359 /* Why was the hash table entry size definition changed from
3360 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3361 this is the only reason for the s390_elf64_size_info structure. */
3363 const struct elf_size_info s390_elf64_size_info =
3365 sizeof (Elf64_External_Ehdr),
3366 sizeof (Elf64_External_Phdr),
3367 sizeof (Elf64_External_Shdr),
3368 sizeof (Elf64_External_Rel),
3369 sizeof (Elf64_External_Rela),
3370 sizeof (Elf64_External_Sym),
3371 sizeof (Elf64_External_Dyn),
3372 sizeof (Elf_External_Note),
3373 8, /* hash-table entry size. */
3374 1, /* internal relocations per external relocations. */
3375 64, /* arch_size. */
3376 3, /* log_file_align. */
3377 ELFCLASS64, EV_CURRENT,
3378 bfd_elf64_write_out_phdrs,
3379 bfd_elf64_write_shdrs_and_ehdr,
3380 bfd_elf64_checksum_contents,
3381 bfd_elf64_write_relocs,
3382 bfd_elf64_swap_symbol_in,
3383 bfd_elf64_swap_symbol_out,
3384 bfd_elf64_slurp_reloc_table,
3385 bfd_elf64_slurp_symbol_table,
3386 bfd_elf64_swap_dyn_in,
3387 bfd_elf64_swap_dyn_out,
3388 bfd_elf64_swap_reloc_in,
3389 bfd_elf64_swap_reloc_out,
3390 bfd_elf64_swap_reloca_in,
3391 bfd_elf64_swap_reloca_out
3394 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3395 #define TARGET_BIG_NAME "elf64-s390"
3396 #define ELF_ARCH bfd_arch_s390
3397 #define ELF_TARGET_ID S390_ELF_DATA
3398 #define ELF_MACHINE_CODE EM_S390
3399 #define ELF_MACHINE_ALT1 EM_S390_OLD
3400 #define ELF_MAXPAGESIZE 0x1000
3402 #define elf_backend_size_info s390_elf64_size_info
3404 #define elf_backend_can_gc_sections 1
3405 #define elf_backend_can_refcount 1
3406 #define elf_backend_want_got_plt 1
3407 #define elf_backend_plt_readonly 1
3408 #define elf_backend_want_plt_sym 0
3409 #define elf_backend_got_header_size 24
3410 #define elf_backend_rela_normal 1
3412 #define elf_info_to_howto elf_s390_info_to_howto
3414 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3415 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3416 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3417 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3419 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3420 #define elf_backend_check_relocs elf_s390_check_relocs
3421 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3422 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3423 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3424 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3425 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3426 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3427 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3428 #define elf_backend_relocate_section elf_s390_relocate_section
3429 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3430 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3431 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3432 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3434 #define bfd_elf64_mkobject elf_s390_mkobject
3435 #define elf_backend_object_p elf_s390_object_p
3437 #include "elf64-target.h"