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 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
559 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
560 0x07, 0xf1, /* br %r1 */
561 0x0d, 0x10, /* basr %r1,%r0 */
562 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
563 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
564 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
567 /* The first PLT entry pushes the offset into the symbol table
568 from R1 onto the stack at 8(15) and the loader object info
569 at 12(15), loads the loader address in R1 and jumps to it. */
571 /* The first entry in the PLT:
574 STG 1,56(15) # r1 contains the offset into the symbol table
575 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
576 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
577 LG 1,16(1) # get entry address of loader
578 BCR 15,1 # jump to loader
580 Fixup at offset 8: relative address to start of GOT. */
582 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
584 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
585 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
586 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
587 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
588 0x07, 0xf1, /* br %r1 */
589 0x07, 0x00, /* nopr %r0 */
590 0x07, 0x00, /* nopr %r0 */
591 0x07, 0x00 /* nopr %r0 */
595 /* s390 ELF linker hash entry. */
597 struct elf_s390_link_hash_entry
599 struct elf_link_hash_entry elf;
601 /* Track dynamic relocs copied for this symbol. */
602 struct elf_dyn_relocs *dyn_relocs;
604 /* Number of GOTPLT references for a function. */
605 bfd_signed_vma gotplt_refcount;
607 #define GOT_UNKNOWN 0
611 #define GOT_TLS_IE_NLT 3
612 unsigned char tls_type;
615 #define elf_s390_hash_entry(ent) \
616 ((struct elf_s390_link_hash_entry *)(ent))
618 /* NOTE: Keep this structure in sync with
619 the one declared in elf32-s390.c. */
620 struct elf_s390_obj_tdata
622 struct elf_obj_tdata root;
624 /* TLS type for each local got entry. */
625 char *local_got_tls_type;
628 #define elf_s390_tdata(abfd) \
629 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
631 #define elf_s390_local_got_tls_type(abfd) \
632 (elf_s390_tdata (abfd)->local_got_tls_type)
634 #define is_s390_elf(bfd) \
635 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
636 && elf_tdata (bfd) != NULL \
637 && elf_object_id (bfd) == S390_ELF_DATA)
640 elf_s390_mkobject (bfd *abfd)
642 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
647 elf_s390_object_p (abfd)
650 /* Set the right machine number for an s390 elf32 file. */
651 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
654 /* s390 ELF linker hash table. */
656 struct elf_s390_link_hash_table
658 struct elf_link_hash_table elf;
660 /* Short-cuts to get to dynamic linker sections. */
670 bfd_signed_vma refcount;
674 /* Small local sym cache. */
675 struct sym_cache sym_cache;
678 /* Get the s390 ELF linker hash table from a link_info structure. */
680 #define elf_s390_hash_table(p) \
681 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
682 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
684 /* Create an entry in an s390 ELF linker hash table. */
686 static struct bfd_hash_entry *
687 link_hash_newfunc (entry, table, string)
688 struct bfd_hash_entry *entry;
689 struct bfd_hash_table *table;
692 /* Allocate the structure if it has not already been allocated by a
696 entry = bfd_hash_allocate (table,
697 sizeof (struct elf_s390_link_hash_entry));
702 /* Call the allocation method of the superclass. */
703 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
706 struct elf_s390_link_hash_entry *eh;
708 eh = (struct elf_s390_link_hash_entry *) entry;
709 eh->dyn_relocs = NULL;
710 eh->gotplt_refcount = 0;
711 eh->tls_type = GOT_UNKNOWN;
717 /* Create an s390 ELF linker hash table. */
719 static struct bfd_link_hash_table *
720 elf_s390_link_hash_table_create (abfd)
723 struct elf_s390_link_hash_table *ret;
724 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
726 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
730 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
731 sizeof (struct elf_s390_link_hash_entry),
745 ret->tls_ldm_got.refcount = 0;
746 ret->sym_cache.abfd = NULL;
748 return &ret->elf.root;
751 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
752 shortcuts to them in our hash table. */
755 create_got_section (bfd *dynobj,
756 struct bfd_link_info *info)
758 struct elf_s390_link_hash_table *htab;
760 if (! _bfd_elf_create_got_section (dynobj, info))
763 htab = elf_s390_hash_table (info);
767 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
768 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
769 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
770 if (!htab->sgot || !htab->sgotplt || !htab->srelgot)
775 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
776 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
780 elf_s390_create_dynamic_sections (bfd *dynobj,
781 struct bfd_link_info *info)
783 struct elf_s390_link_hash_table *htab;
785 htab = elf_s390_hash_table (info);
789 if (!htab->sgot && !create_got_section (dynobj, info))
792 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
795 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
796 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
797 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
799 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
801 if (!htab->splt || !htab->srelplt || !htab->sdynbss
802 || (!info->shared && !htab->srelbss))
808 /* Copy the extra info we tack onto an elf_link_hash_entry. */
811 elf_s390_copy_indirect_symbol (info, dir, ind)
812 struct bfd_link_info *info;
813 struct elf_link_hash_entry *dir, *ind;
815 struct elf_s390_link_hash_entry *edir, *eind;
817 edir = (struct elf_s390_link_hash_entry *) dir;
818 eind = (struct elf_s390_link_hash_entry *) ind;
820 if (eind->dyn_relocs != NULL)
822 if (edir->dyn_relocs != NULL)
824 struct elf_dyn_relocs **pp;
825 struct elf_dyn_relocs *p;
827 /* Add reloc counts against the indirect sym to the direct sym
828 list. Merge any entries against the same section. */
829 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
831 struct elf_dyn_relocs *q;
833 for (q = edir->dyn_relocs; q != NULL; q = q->next)
834 if (q->sec == p->sec)
836 q->pc_count += p->pc_count;
837 q->count += p->count;
844 *pp = edir->dyn_relocs;
847 edir->dyn_relocs = eind->dyn_relocs;
848 eind->dyn_relocs = NULL;
851 if (ind->root.type == bfd_link_hash_indirect
852 && dir->got.refcount <= 0)
854 edir->tls_type = eind->tls_type;
855 eind->tls_type = GOT_UNKNOWN;
858 if (ELIMINATE_COPY_RELOCS
859 && ind->root.type != bfd_link_hash_indirect
860 && dir->dynamic_adjusted)
862 /* If called to transfer flags for a weakdef during processing
863 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
864 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
865 dir->ref_dynamic |= ind->ref_dynamic;
866 dir->ref_regular |= ind->ref_regular;
867 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
868 dir->needs_plt |= ind->needs_plt;
871 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
875 elf_s390_tls_transition (info, r_type, is_local)
876 struct bfd_link_info *info;
888 return R_390_TLS_LE64;
889 return R_390_TLS_IE64;
890 case R_390_TLS_GOTIE64:
892 return R_390_TLS_LE64;
893 return R_390_TLS_GOTIE64;
894 case R_390_TLS_LDM64:
895 return R_390_TLS_LE64;
901 /* Look through the relocs for a section during the first phase, and
902 allocate space in the global offset table or procedure linkage
906 elf_s390_check_relocs (bfd *abfd,
907 struct bfd_link_info *info,
909 const Elf_Internal_Rela *relocs)
911 struct elf_s390_link_hash_table *htab;
912 Elf_Internal_Shdr *symtab_hdr;
913 struct elf_link_hash_entry **sym_hashes;
914 const Elf_Internal_Rela *rel;
915 const Elf_Internal_Rela *rel_end;
917 bfd_signed_vma *local_got_refcounts;
918 int tls_type, old_tls_type;
920 if (info->relocatable)
923 BFD_ASSERT (is_s390_elf (abfd));
925 htab = elf_s390_hash_table (info);
929 symtab_hdr = &elf_symtab_hdr (abfd);
930 sym_hashes = elf_sym_hashes (abfd);
931 local_got_refcounts = elf_local_got_refcounts (abfd);
935 rel_end = relocs + sec->reloc_count;
936 for (rel = relocs; rel < rel_end; rel++)
939 unsigned long r_symndx;
940 struct elf_link_hash_entry *h;
942 r_symndx = ELF64_R_SYM (rel->r_info);
944 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
946 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
952 if (r_symndx < symtab_hdr->sh_info)
956 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
957 while (h->root.type == bfd_link_hash_indirect
958 || h->root.type == bfd_link_hash_warning)
959 h = (struct elf_link_hash_entry *) h->root.u.i.link;
962 /* Create got section and local_got_refcounts array if they
964 r_type = elf_s390_tls_transition (info,
965 ELF64_R_TYPE (rel->r_info),
980 case R_390_GOTPLTENT:
982 case R_390_TLS_GOTIE12:
983 case R_390_TLS_GOTIE20:
984 case R_390_TLS_GOTIE64:
985 case R_390_TLS_IEENT:
987 case R_390_TLS_LDM64:
989 && local_got_refcounts == NULL)
993 size = symtab_hdr->sh_info;
994 size *= (sizeof (bfd_signed_vma) + sizeof(char));
995 local_got_refcounts = ((bfd_signed_vma *)
996 bfd_zalloc (abfd, size));
997 if (local_got_refcounts == NULL)
999 elf_local_got_refcounts (abfd) = local_got_refcounts;
1000 elf_s390_local_got_tls_type (abfd)
1001 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1004 case R_390_GOTOFF16:
1005 case R_390_GOTOFF32:
1006 case R_390_GOTOFF64:
1008 case R_390_GOTPCDBL:
1009 if (htab->sgot == NULL)
1011 if (htab->elf.dynobj == NULL)
1012 htab->elf.dynobj = abfd;
1013 if (!create_got_section (htab->elf.dynobj, info))
1020 case R_390_GOTOFF16:
1021 case R_390_GOTOFF32:
1022 case R_390_GOTOFF64:
1024 case R_390_GOTPCDBL:
1025 /* Got is created, nothing to be done. */
1028 case R_390_PLT16DBL:
1030 case R_390_PLT32DBL:
1032 case R_390_PLTOFF16:
1033 case R_390_PLTOFF32:
1034 case R_390_PLTOFF64:
1035 /* This symbol requires a procedure linkage table entry. We
1036 actually build the entry in adjust_dynamic_symbol,
1037 because this might be a case of linking PIC code which is
1038 never referenced by a dynamic object, in which case we
1039 don't need to generate a procedure linkage table entry
1042 /* If this is a local symbol, we resolve it directly without
1043 creating a procedure linkage table entry. */
1047 h->plt.refcount += 1;
1051 case R_390_GOTPLT12:
1052 case R_390_GOTPLT16:
1053 case R_390_GOTPLT20:
1054 case R_390_GOTPLT32:
1055 case R_390_GOTPLT64:
1056 case R_390_GOTPLTENT:
1057 /* This symbol requires either a procedure linkage table entry
1058 or an entry in the local got. We actually build the entry
1059 in adjust_dynamic_symbol because whether this is really a
1060 global reference can change and with it the fact if we have
1061 to create a plt entry or a local got entry. To be able to
1062 make a once global symbol a local one we have to keep track
1063 of the number of gotplt references that exist for this
1067 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1069 h->plt.refcount += 1;
1072 local_got_refcounts[r_symndx] += 1;
1075 case R_390_TLS_LDM64:
1076 htab->tls_ldm_got.refcount += 1;
1079 case R_390_TLS_IE64:
1080 case R_390_TLS_GOTIE12:
1081 case R_390_TLS_GOTIE20:
1082 case R_390_TLS_GOTIE64:
1083 case R_390_TLS_IEENT:
1085 info->flags |= DF_STATIC_TLS;
1094 case R_390_TLS_GD64:
1095 /* This symbol requires a global offset table entry. */
1104 tls_type = GOT_NORMAL;
1106 case R_390_TLS_GD64:
1107 tls_type = GOT_TLS_GD;
1109 case R_390_TLS_IE64:
1110 case R_390_TLS_GOTIE64:
1111 tls_type = GOT_TLS_IE;
1113 case R_390_TLS_GOTIE12:
1114 case R_390_TLS_GOTIE20:
1115 case R_390_TLS_IEENT:
1116 tls_type = GOT_TLS_IE_NLT;
1122 h->got.refcount += 1;
1123 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1127 local_got_refcounts[r_symndx] += 1;
1128 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1130 /* If a TLS symbol is accessed using IE at least once,
1131 there is no point to use dynamic model for it. */
1132 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1134 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1136 (*_bfd_error_handler)
1137 (_("%B: `%s' accessed both as normal and thread local symbol"),
1138 abfd, h->root.root.string);
1141 if (old_tls_type > tls_type)
1142 tls_type = old_tls_type;
1145 if (old_tls_type != tls_type)
1148 elf_s390_hash_entry (h)->tls_type = tls_type;
1150 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1153 if (r_type != R_390_TLS_IE64)
1157 case R_390_TLS_LE64:
1160 info->flags |= DF_STATIC_TLS;
1172 if (h != NULL && !info->shared)
1174 /* If this reloc is in a read-only section, we might
1175 need a copy reloc. We can't check reliably at this
1176 stage whether the section is read-only, as input
1177 sections have not yet been mapped to output sections.
1178 Tentatively set the flag for now, and correct in
1179 adjust_dynamic_symbol. */
1182 /* We may need a .plt entry if the function this reloc
1183 refers to is in a shared lib. */
1184 h->plt.refcount += 1;
1187 /* If we are creating a shared library, and this is a reloc
1188 against a global symbol, or a non PC relative reloc
1189 against a local symbol, then we need to copy the reloc
1190 into the shared library. However, if we are linking with
1191 -Bsymbolic, we do not need to copy a reloc against a
1192 global symbol which is defined in an object we are
1193 including in the link (i.e., DEF_REGULAR is set). At
1194 this point we have not seen all the input files, so it is
1195 possible that DEF_REGULAR is not set now but will be set
1196 later (it is never cleared). In case of a weak definition,
1197 DEF_REGULAR may be cleared later by a strong definition in
1198 a shared library. We account for that possibility below by
1199 storing information in the relocs_copied field of the hash
1200 table entry. A similar situation occurs when creating
1201 shared libraries and symbol visibility changes render the
1204 If on the other hand, we are creating an executable, we
1205 may need to keep relocations for symbols satisfied by a
1206 dynamic library if we manage to avoid copy relocs for the
1209 && (sec->flags & SEC_ALLOC) != 0
1210 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1211 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1212 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1213 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1214 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1216 && (! SYMBOLIC_BIND (info, h)
1217 || h->root.type == bfd_link_hash_defweak
1218 || !h->def_regular))))
1219 || (ELIMINATE_COPY_RELOCS
1221 && (sec->flags & SEC_ALLOC) != 0
1223 && (h->root.type == bfd_link_hash_defweak
1224 || !h->def_regular)))
1226 struct elf_dyn_relocs *p;
1227 struct elf_dyn_relocs **head;
1229 /* We must copy these reloc types into the output file.
1230 Create a reloc section in dynobj and make room for
1234 if (htab->elf.dynobj == NULL)
1235 htab->elf.dynobj = abfd;
1237 sreloc = _bfd_elf_make_dynamic_reloc_section
1238 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1244 /* If this is a global symbol, we count the number of
1245 relocations we need for this symbol. */
1248 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1252 /* Track dynamic relocs needed for local syms too.
1253 We really need local syms available to do this
1257 Elf_Internal_Sym *isym;
1259 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1264 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1268 vpp = &elf_section_data (s)->local_dynrel;
1269 head = (struct elf_dyn_relocs **) vpp;
1273 if (p == NULL || p->sec != sec)
1275 bfd_size_type amt = sizeof *p;
1276 p = ((struct elf_dyn_relocs *)
1277 bfd_alloc (htab->elf.dynobj, amt));
1288 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1289 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1290 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1291 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1292 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1297 /* This relocation describes the C++ object vtable hierarchy.
1298 Reconstruct it for later use during GC. */
1299 case R_390_GNU_VTINHERIT:
1300 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1304 /* This relocation describes which C++ vtable entries are actually
1305 used. Record for later use during GC. */
1306 case R_390_GNU_VTENTRY:
1307 BFD_ASSERT (h != NULL);
1309 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1321 /* Return the section that should be marked against GC for a given
1325 elf_s390_gc_mark_hook (asection *sec,
1326 struct bfd_link_info *info,
1327 Elf_Internal_Rela *rel,
1328 struct elf_link_hash_entry *h,
1329 Elf_Internal_Sym *sym)
1332 switch (ELF64_R_TYPE (rel->r_info))
1334 case R_390_GNU_VTINHERIT:
1335 case R_390_GNU_VTENTRY:
1339 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1342 /* Update the got entry reference counts for the section being removed. */
1345 elf_s390_gc_sweep_hook (bfd *abfd,
1346 struct bfd_link_info *info,
1348 const Elf_Internal_Rela *relocs)
1350 struct elf_s390_link_hash_table *htab;
1351 Elf_Internal_Shdr *symtab_hdr;
1352 struct elf_link_hash_entry **sym_hashes;
1353 bfd_signed_vma *local_got_refcounts;
1354 const Elf_Internal_Rela *rel, *relend;
1356 if (info->relocatable)
1359 htab = elf_s390_hash_table (info);
1363 elf_section_data (sec)->local_dynrel = NULL;
1365 symtab_hdr = &elf_symtab_hdr (abfd);
1366 sym_hashes = elf_sym_hashes (abfd);
1367 local_got_refcounts = elf_local_got_refcounts (abfd);
1369 relend = relocs + sec->reloc_count;
1370 for (rel = relocs; rel < relend; rel++)
1372 unsigned long r_symndx;
1373 unsigned int r_type;
1374 struct elf_link_hash_entry *h = NULL;
1376 r_symndx = ELF64_R_SYM (rel->r_info);
1377 if (r_symndx >= symtab_hdr->sh_info)
1379 struct elf_s390_link_hash_entry *eh;
1380 struct elf_dyn_relocs **pp;
1381 struct elf_dyn_relocs *p;
1383 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1384 while (h->root.type == bfd_link_hash_indirect
1385 || h->root.type == bfd_link_hash_warning)
1386 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1387 eh = (struct elf_s390_link_hash_entry *) h;
1389 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1392 /* Everything must go for SEC. */
1398 r_type = ELF64_R_TYPE (rel->r_info);
1399 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1402 case R_390_TLS_LDM64:
1403 if (htab->tls_ldm_got.refcount > 0)
1404 htab->tls_ldm_got.refcount -= 1;
1407 case R_390_TLS_GD64:
1408 case R_390_TLS_IE64:
1409 case R_390_TLS_GOTIE12:
1410 case R_390_TLS_GOTIE20:
1411 case R_390_TLS_GOTIE64:
1412 case R_390_TLS_IEENT:
1418 case R_390_GOTOFF16:
1419 case R_390_GOTOFF32:
1420 case R_390_GOTOFF64:
1422 case R_390_GOTPCDBL:
1426 if (h->got.refcount > 0)
1427 h->got.refcount -= 1;
1429 else if (local_got_refcounts != NULL)
1431 if (local_got_refcounts[r_symndx] > 0)
1432 local_got_refcounts[r_symndx] -= 1;
1451 case R_390_PLT16DBL:
1453 case R_390_PLT32DBL:
1455 case R_390_PLTOFF16:
1456 case R_390_PLTOFF32:
1457 case R_390_PLTOFF64:
1460 if (h->plt.refcount > 0)
1461 h->plt.refcount -= 1;
1465 case R_390_GOTPLT12:
1466 case R_390_GOTPLT16:
1467 case R_390_GOTPLT20:
1468 case R_390_GOTPLT32:
1469 case R_390_GOTPLT64:
1470 case R_390_GOTPLTENT:
1473 if (h->plt.refcount > 0)
1475 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1476 h->plt.refcount -= 1;
1479 else if (local_got_refcounts != NULL)
1481 if (local_got_refcounts[r_symndx] > 0)
1482 local_got_refcounts[r_symndx] -= 1;
1494 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1495 entry but we found we will not create any. Called when we find we will
1496 not have any PLT for this symbol, by for example
1497 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1498 or elf_s390_size_dynamic_sections if no dynamic sections will be
1499 created (we're only linking static objects). */
1502 elf_s390_adjust_gotplt (h)
1503 struct elf_s390_link_hash_entry *h;
1505 if (h->elf.root.type == bfd_link_hash_warning)
1506 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1508 if (h->gotplt_refcount <= 0)
1511 /* We simply add the number of gotplt references to the number
1512 * of got references for this symbol. */
1513 h->elf.got.refcount += h->gotplt_refcount;
1514 h->gotplt_refcount = -1;
1517 /* Adjust a symbol defined by a dynamic object and referenced by a
1518 regular object. The current definition is in some section of the
1519 dynamic object, but we're not including those sections. We have to
1520 change the definition to something the rest of the link can
1524 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1525 struct elf_link_hash_entry *h)
1527 struct elf_s390_link_hash_table *htab;
1530 /* If this is a function, put it in the procedure linkage table. We
1531 will fill in the contents of the procedure linkage table later
1532 (although we could actually do it here). */
1533 if (h->type == STT_FUNC
1536 if (h->plt.refcount <= 0
1537 || SYMBOL_CALLS_LOCAL (info, h)
1538 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1539 && h->root.type == bfd_link_hash_undefweak))
1541 /* This case can occur if we saw a PLT32 reloc in an input
1542 file, but the symbol was never referred to by a dynamic
1543 object, or if all references were garbage collected. In
1544 such a case, we don't actually need to build a procedure
1545 linkage table, and we can just do a PC32 reloc instead. */
1546 h->plt.offset = (bfd_vma) -1;
1548 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1554 /* It's possible that we incorrectly decided a .plt reloc was
1555 needed for an R_390_PC32 reloc to a non-function sym in
1556 check_relocs. We can't decide accurately between function and
1557 non-function syms in check-relocs; Objects loaded later in
1558 the link may change h->type. So fix it now. */
1559 h->plt.offset = (bfd_vma) -1;
1561 /* If this is a weak symbol, and there is a real definition, the
1562 processor independent code will have arranged for us to see the
1563 real definition first, and we can just use the same value. */
1564 if (h->u.weakdef != NULL)
1566 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1567 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1568 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1569 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1570 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1571 h->non_got_ref = h->u.weakdef->non_got_ref;
1575 /* This is a reference to a symbol defined by a dynamic object which
1576 is not a function. */
1578 /* If we are creating a shared library, we must presume that the
1579 only references to the symbol are via the global offset table.
1580 For such cases we need not do anything here; the relocations will
1581 be handled correctly by relocate_section. */
1585 /* If there are no references to this symbol that do not use the
1586 GOT, we don't need to generate a copy reloc. */
1587 if (!h->non_got_ref)
1590 /* If -z nocopyreloc was given, we won't generate them either. */
1591 if (info->nocopyreloc)
1597 if (ELIMINATE_COPY_RELOCS)
1599 struct elf_s390_link_hash_entry * eh;
1600 struct elf_dyn_relocs *p;
1602 eh = (struct elf_s390_link_hash_entry *) h;
1603 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1605 s = p->sec->output_section;
1606 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1610 /* If we didn't find any dynamic relocs in read-only sections, then
1611 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1619 /* We must allocate the symbol in our .dynbss section, which will
1620 become part of the .bss section of the executable. There will be
1621 an entry for this symbol in the .dynsym section. The dynamic
1622 object will contain position independent code, so all references
1623 from the dynamic object to this symbol will go through the global
1624 offset table. The dynamic linker will use the .dynsym entry to
1625 determine the address it must put in the global offset table, so
1626 both the dynamic object and the regular object will refer to the
1627 same memory location for the variable. */
1629 htab = elf_s390_hash_table (info);
1633 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1634 copy the initial value out of the dynamic object and into the
1635 runtime process image. */
1636 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1638 htab->srelbss->size += sizeof (Elf64_External_Rela);
1644 return _bfd_elf_adjust_dynamic_copy (h, s);
1647 /* Allocate space in .plt, .got and associated reloc sections for
1651 allocate_dynrelocs (struct elf_link_hash_entry *h,
1654 struct bfd_link_info *info;
1655 struct elf_s390_link_hash_table *htab;
1656 struct elf_s390_link_hash_entry *eh;
1657 struct elf_dyn_relocs *p;
1659 if (h->root.type == bfd_link_hash_indirect)
1662 info = (struct bfd_link_info *) inf;
1663 htab = elf_s390_hash_table (info);
1667 if (htab->elf.dynamic_sections_created
1668 && h->plt.refcount > 0)
1670 /* Make sure this symbol is output as a dynamic symbol.
1671 Undefined weak syms won't yet be marked as dynamic. */
1672 if (h->dynindx == -1
1673 && !h->forced_local)
1675 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1680 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1682 asection *s = htab->splt;
1684 /* If this is the first .plt entry, make room for the special
1687 s->size += PLT_FIRST_ENTRY_SIZE;
1689 h->plt.offset = s->size;
1691 /* If this symbol is not defined in a regular file, and we are
1692 not generating a shared library, then set the symbol to this
1693 location in the .plt. This is required to make function
1694 pointers compare as equal between the normal executable and
1695 the shared library. */
1699 h->root.u.def.section = s;
1700 h->root.u.def.value = h->plt.offset;
1703 /* Make room for this entry. */
1704 s->size += PLT_ENTRY_SIZE;
1706 /* We also need to make an entry in the .got.plt section, which
1707 will be placed in the .got section by the linker script. */
1708 htab->sgotplt->size += GOT_ENTRY_SIZE;
1710 /* We also need to make an entry in the .rela.plt section. */
1711 htab->srelplt->size += sizeof (Elf64_External_Rela);
1715 h->plt.offset = (bfd_vma) -1;
1717 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1722 h->plt.offset = (bfd_vma) -1;
1724 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1727 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1728 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1729 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1730 we can save the dynamic TLS relocation. */
1731 if (h->got.refcount > 0
1734 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1736 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1737 /* For the GOTIE access without a literal pool entry the offset has
1738 to be stored somewhere. The immediate value in the instruction
1739 is not bit enough so the value is stored in the got. */
1741 h->got.offset = htab->sgot->size;
1742 htab->sgot->size += GOT_ENTRY_SIZE;
1745 h->got.offset = (bfd_vma) -1;
1747 else if (h->got.refcount > 0)
1751 int tls_type = elf_s390_hash_entry(h)->tls_type;
1753 /* Make sure this symbol is output as a dynamic symbol.
1754 Undefined weak syms won't yet be marked as dynamic. */
1755 if (h->dynindx == -1
1756 && !h->forced_local)
1758 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1763 h->got.offset = s->size;
1764 s->size += GOT_ENTRY_SIZE;
1765 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1766 if (tls_type == GOT_TLS_GD)
1767 s->size += GOT_ENTRY_SIZE;
1768 dyn = htab->elf.dynamic_sections_created;
1769 /* R_390_TLS_IE64 needs one dynamic relocation,
1770 R_390_TLS_GD64 needs one if local symbol and two if global. */
1771 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1772 || tls_type >= GOT_TLS_IE)
1773 htab->srelgot->size += sizeof (Elf64_External_Rela);
1774 else if (tls_type == GOT_TLS_GD)
1775 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1776 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1777 || h->root.type != bfd_link_hash_undefweak)
1779 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1780 htab->srelgot->size += sizeof (Elf64_External_Rela);
1783 h->got.offset = (bfd_vma) -1;
1785 eh = (struct elf_s390_link_hash_entry *) h;
1786 if (eh->dyn_relocs == NULL)
1789 /* In the shared -Bsymbolic case, discard space allocated for
1790 dynamic pc-relative relocs against symbols which turn out to be
1791 defined in regular objects. For the normal shared case, discard
1792 space for pc-relative relocs that have become local due to symbol
1793 visibility changes. */
1797 if (SYMBOL_CALLS_LOCAL (info, h))
1799 struct elf_dyn_relocs **pp;
1801 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1803 p->count -= p->pc_count;
1812 /* Also discard relocs on undefined weak syms with non-default
1814 if (eh->dyn_relocs != NULL
1815 && h->root.type == bfd_link_hash_undefweak)
1817 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1818 eh->dyn_relocs = NULL;
1820 /* Make sure undefined weak symbols are output as a dynamic
1822 else if (h->dynindx == -1
1823 && !h->forced_local)
1825 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1830 else if (ELIMINATE_COPY_RELOCS)
1832 /* For the non-shared case, discard space for relocs against
1833 symbols which turn out to need copy relocs or are not
1839 || (htab->elf.dynamic_sections_created
1840 && (h->root.type == bfd_link_hash_undefweak
1841 || h->root.type == bfd_link_hash_undefined))))
1843 /* Make sure this symbol is output as a dynamic symbol.
1844 Undefined weak syms won't yet be marked as dynamic. */
1845 if (h->dynindx == -1
1846 && !h->forced_local)
1848 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1852 /* If that succeeded, we know we'll be keeping all the
1854 if (h->dynindx != -1)
1858 eh->dyn_relocs = NULL;
1863 /* Finally, allocate space. */
1864 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1866 asection *sreloc = elf_section_data (p->sec)->sreloc;
1867 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1873 /* Find any dynamic relocs that apply to read-only sections. */
1876 readonly_dynrelocs (h, inf)
1877 struct elf_link_hash_entry *h;
1880 struct elf_s390_link_hash_entry *eh;
1881 struct elf_dyn_relocs *p;
1883 eh = (struct elf_s390_link_hash_entry *) h;
1884 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1886 asection *s = p->sec->output_section;
1888 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1890 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1892 info->flags |= DF_TEXTREL;
1894 /* Not an error, just cut short the traversal. */
1901 /* Set the sizes of the dynamic sections. */
1904 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1905 struct bfd_link_info *info)
1907 struct elf_s390_link_hash_table *htab;
1913 htab = elf_s390_hash_table (info);
1917 dynobj = htab->elf.dynobj;
1921 if (htab->elf.dynamic_sections_created)
1923 /* Set the contents of the .interp section to the interpreter. */
1924 if (info->executable)
1926 s = bfd_get_section_by_name (dynobj, ".interp");
1929 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1930 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1934 /* Set up .got offsets for local syms, and space for local dynamic
1936 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1938 bfd_signed_vma *local_got;
1939 bfd_signed_vma *end_local_got;
1940 char *local_tls_type;
1941 bfd_size_type locsymcount;
1942 Elf_Internal_Shdr *symtab_hdr;
1945 if (! is_s390_elf (ibfd))
1948 for (s = ibfd->sections; s != NULL; s = s->next)
1950 struct elf_dyn_relocs *p;
1952 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1954 if (!bfd_is_abs_section (p->sec)
1955 && bfd_is_abs_section (p->sec->output_section))
1957 /* Input section has been discarded, either because
1958 it is a copy of a linkonce section or due to
1959 linker script /DISCARD/, so we'll be discarding
1962 else if (p->count != 0)
1964 srela = elf_section_data (p->sec)->sreloc;
1965 srela->size += p->count * sizeof (Elf64_External_Rela);
1966 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1967 info->flags |= DF_TEXTREL;
1972 local_got = elf_local_got_refcounts (ibfd);
1976 symtab_hdr = &elf_symtab_hdr (ibfd);
1977 locsymcount = symtab_hdr->sh_info;
1978 end_local_got = local_got + locsymcount;
1979 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1981 srela = htab->srelgot;
1982 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1986 *local_got = s->size;
1987 s->size += GOT_ENTRY_SIZE;
1988 if (*local_tls_type == GOT_TLS_GD)
1989 s->size += GOT_ENTRY_SIZE;
1991 srela->size += sizeof (Elf64_External_Rela);
1994 *local_got = (bfd_vma) -1;
1998 if (htab->tls_ldm_got.refcount > 0)
2000 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2002 htab->tls_ldm_got.offset = htab->sgot->size;
2003 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2004 htab->srelgot->size += sizeof (Elf64_External_Rela);
2007 htab->tls_ldm_got.offset = -1;
2009 /* Allocate global sym .plt and .got entries, and space for global
2010 sym dynamic relocs. */
2011 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2013 /* We now have determined the sizes of the various dynamic sections.
2014 Allocate memory for them. */
2016 for (s = dynobj->sections; s != NULL; s = s->next)
2018 if ((s->flags & SEC_LINKER_CREATED) == 0)
2023 || s == htab->sgotplt
2024 || s == htab->sdynbss)
2026 /* Strip this section if we don't need it; see the
2029 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2031 if (s->size != 0 && s != htab->srelplt)
2034 /* We use the reloc_count field as a counter if we need
2035 to copy relocs into the output file. */
2040 /* It's not one of our sections, so don't allocate space. */
2046 /* If we don't need this section, strip it from the
2047 output file. This is to handle .rela.bss and
2048 .rela.plt. We must create it in
2049 create_dynamic_sections, because it must be created
2050 before the linker maps input sections to output
2051 sections. The linker does that before
2052 adjust_dynamic_symbol is called, and it is that
2053 function which decides whether anything needs to go
2054 into these sections. */
2056 s->flags |= SEC_EXCLUDE;
2060 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2063 /* Allocate memory for the section contents. We use bfd_zalloc
2064 here in case unused entries are not reclaimed before the
2065 section's contents are written out. This should not happen,
2066 but this way if it does, we get a R_390_NONE reloc instead
2068 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2069 if (s->contents == NULL)
2073 if (htab->elf.dynamic_sections_created)
2075 /* Add some entries to the .dynamic section. We fill in the
2076 values later, in elf_s390_finish_dynamic_sections, but we
2077 must add the entries now so that we get the correct size for
2078 the .dynamic section. The DT_DEBUG entry is filled in by the
2079 dynamic linker and used by the debugger. */
2080 #define add_dynamic_entry(TAG, VAL) \
2081 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2083 if (info->executable)
2085 if (!add_dynamic_entry (DT_DEBUG, 0))
2089 if (htab->splt->size != 0)
2091 if (!add_dynamic_entry (DT_PLTGOT, 0)
2092 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2093 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2094 || !add_dynamic_entry (DT_JMPREL, 0))
2100 if (!add_dynamic_entry (DT_RELA, 0)
2101 || !add_dynamic_entry (DT_RELASZ, 0)
2102 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2105 /* If any dynamic relocs apply to a read-only section,
2106 then we need a DT_TEXTREL entry. */
2107 if ((info->flags & DF_TEXTREL) == 0)
2108 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2111 if ((info->flags & DF_TEXTREL) != 0)
2113 if (!add_dynamic_entry (DT_TEXTREL, 0))
2118 #undef add_dynamic_entry
2123 /* Return the base VMA address which should be subtracted from real addresses
2124 when resolving @dtpoff relocation.
2125 This is PT_TLS segment p_vaddr. */
2129 struct bfd_link_info *info;
2131 /* If tls_sec is NULL, we should have signalled an error already. */
2132 if (elf_hash_table (info)->tls_sec == NULL)
2134 return elf_hash_table (info)->tls_sec->vma;
2137 /* Return the relocation value for @tpoff relocation
2138 if STT_TLS virtual address is ADDRESS. */
2141 tpoff (info, address)
2142 struct bfd_link_info *info;
2145 struct elf_link_hash_table *htab = elf_hash_table (info);
2147 /* If tls_sec is NULL, we should have signalled an error already. */
2148 if (htab->tls_sec == NULL)
2150 return htab->tls_size + htab->tls_sec->vma - address;
2153 /* Complain if TLS instruction relocation is against an invalid
2157 invalid_tls_insn (input_bfd, input_section, rel)
2159 asection *input_section;
2160 Elf_Internal_Rela *rel;
2162 reloc_howto_type *howto;
2164 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2165 (*_bfd_error_handler)
2166 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2169 (long) rel->r_offset,
2171 bfd_set_error (bfd_error_bad_value);
2174 /* Relocate a 390 ELF section. */
2177 elf_s390_relocate_section (bfd *output_bfd,
2178 struct bfd_link_info *info,
2180 asection *input_section,
2182 Elf_Internal_Rela *relocs,
2183 Elf_Internal_Sym *local_syms,
2184 asection **local_sections)
2186 struct elf_s390_link_hash_table *htab;
2187 Elf_Internal_Shdr *symtab_hdr;
2188 struct elf_link_hash_entry **sym_hashes;
2189 bfd_vma *local_got_offsets;
2190 Elf_Internal_Rela *rel;
2191 Elf_Internal_Rela *relend;
2193 BFD_ASSERT (is_s390_elf (input_bfd));
2195 htab = elf_s390_hash_table (info);
2199 symtab_hdr = &elf_symtab_hdr (input_bfd);
2200 sym_hashes = elf_sym_hashes (input_bfd);
2201 local_got_offsets = elf_local_got_offsets (input_bfd);
2204 relend = relocs + input_section->reloc_count;
2205 for (; rel < relend; rel++)
2207 unsigned int r_type;
2208 reloc_howto_type *howto;
2209 unsigned long r_symndx;
2210 struct elf_link_hash_entry *h;
2211 Elf_Internal_Sym *sym;
2215 bfd_boolean unresolved_reloc;
2216 bfd_reloc_status_type r;
2219 r_type = ELF64_R_TYPE (rel->r_info);
2220 if (r_type == (int) R_390_GNU_VTINHERIT
2221 || r_type == (int) R_390_GNU_VTENTRY)
2223 if (r_type >= (int) R_390_max)
2225 bfd_set_error (bfd_error_bad_value);
2229 howto = elf_howto_table + r_type;
2230 r_symndx = ELF64_R_SYM (rel->r_info);
2235 unresolved_reloc = FALSE;
2236 if (r_symndx < symtab_hdr->sh_info)
2238 sym = local_syms + r_symndx;
2239 sec = local_sections[r_symndx];
2240 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2244 bfd_boolean warned ATTRIBUTE_UNUSED;
2246 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2247 r_symndx, symtab_hdr, sym_hashes,
2249 unresolved_reloc, warned);
2252 if (sec != NULL && elf_discarded_section (sec))
2253 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2254 rel, relend, howto, contents);
2256 if (info->relocatable)
2261 case R_390_GOTPLT12:
2262 case R_390_GOTPLT16:
2263 case R_390_GOTPLT20:
2264 case R_390_GOTPLT32:
2265 case R_390_GOTPLT64:
2266 case R_390_GOTPLTENT:
2267 /* There are three cases for a GOTPLT relocation. 1) The
2268 relocation is against the jump slot entry of a plt that
2269 will get emitted to the output file. 2) The relocation
2270 is against the jump slot of a plt entry that has been
2271 removed. elf_s390_adjust_gotplt has created a GOT entry
2272 as replacement. 3) The relocation is against a local symbol.
2273 Cases 2) and 3) are the same as the GOT relocation code
2274 so we just have to test for case 1 and fall through for
2276 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2281 Current offset - size first entry / entry size. */
2282 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2285 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2287 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2288 unresolved_reloc = FALSE;
2290 if (r_type == R_390_GOTPLTENT)
2291 relocation += htab->sgot->output_section->vma;
2302 /* Relocation is to the entry for this symbol in the global
2304 if (htab->sgot == NULL)
2311 off = h->got.offset;
2312 dyn = htab->elf.dynamic_sections_created;
2313 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2315 && SYMBOL_REFERENCES_LOCAL (info, h))
2316 || (ELF_ST_VISIBILITY (h->other)
2317 && h->root.type == bfd_link_hash_undefweak))
2319 /* This is actually a static link, or it is a
2320 -Bsymbolic link and the symbol is defined
2321 locally, or the symbol was forced to be local
2322 because of a version file. We must initialize
2323 this entry in the global offset table. Since the
2324 offset must always be a multiple of 2, we use the
2325 least significant bit to record whether we have
2326 initialized it already.
2328 When doing a dynamic link, we create a .rel.got
2329 relocation entry to initialize the value. This
2330 is done in the finish_dynamic_symbol routine. */
2335 bfd_put_64 (output_bfd, relocation,
2336 htab->sgot->contents + off);
2341 unresolved_reloc = FALSE;
2345 if (local_got_offsets == NULL)
2348 off = local_got_offsets[r_symndx];
2350 /* The offset must always be a multiple of 8. We use
2351 the least significant bit to record whether we have
2352 already generated the necessary reloc. */
2357 bfd_put_64 (output_bfd, relocation,
2358 htab->sgot->contents + off);
2363 Elf_Internal_Rela outrel;
2370 outrel.r_offset = (htab->sgot->output_section->vma
2371 + htab->sgot->output_offset
2373 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2374 outrel.r_addend = relocation;
2376 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2377 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2380 local_got_offsets[r_symndx] |= 1;
2384 if (off >= (bfd_vma) -2)
2387 relocation = htab->sgot->output_offset + off;
2389 /* For @GOTENT the relocation is against the offset between
2390 the instruction and the symbols entry in the GOT and not
2391 between the start of the GOT and the symbols entry. We
2392 add the vma of the GOT to get the correct value. */
2393 if ( r_type == R_390_GOTENT
2394 || r_type == R_390_GOTPLTENT)
2395 relocation += htab->sgot->output_section->vma;
2399 case R_390_GOTOFF16:
2400 case R_390_GOTOFF32:
2401 case R_390_GOTOFF64:
2402 /* Relocation is relative to the start of the global offset
2405 /* Note that sgot->output_offset is not involved in this
2406 calculation. We always want the start of .got. If we
2407 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2408 permitted by the ABI, we might have to change this
2410 relocation -= htab->sgot->output_section->vma;
2414 case R_390_GOTPCDBL:
2415 /* Use global offset table as symbol value. */
2416 relocation = htab->sgot->output_section->vma;
2417 unresolved_reloc = FALSE;
2420 case R_390_PLT16DBL:
2422 case R_390_PLT32DBL:
2424 /* Relocation is to the entry for this symbol in the
2425 procedure linkage table. */
2427 /* Resolve a PLT32 reloc against a local symbol directly,
2428 without using the procedure linkage table. */
2432 if (h->plt.offset == (bfd_vma) -1
2433 || htab->splt == NULL)
2435 /* We didn't make a PLT entry for this symbol. This
2436 happens when statically linking PIC code, or when
2437 using -Bsymbolic. */
2441 relocation = (htab->splt->output_section->vma
2442 + htab->splt->output_offset
2444 unresolved_reloc = FALSE;
2447 case R_390_PLTOFF16:
2448 case R_390_PLTOFF32:
2449 case R_390_PLTOFF64:
2450 /* Relocation is to the entry for this symbol in the
2451 procedure linkage table relative to the start of the GOT. */
2453 /* For local symbols or if we didn't make a PLT entry for
2454 this symbol resolve the symbol directly. */
2456 || h->plt.offset == (bfd_vma) -1
2457 || htab->splt == NULL)
2459 relocation -= htab->sgot->output_section->vma;
2463 relocation = (htab->splt->output_section->vma
2464 + htab->splt->output_offset
2466 - htab->sgot->output_section->vma);
2467 unresolved_reloc = FALSE;
2479 if ((input_section->flags & SEC_ALLOC) == 0)
2484 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2485 || h->root.type != bfd_link_hash_undefweak)
2486 && ((r_type != R_390_PC16
2487 && r_type != R_390_PC16DBL
2488 && r_type != R_390_PC32
2489 && r_type != R_390_PC32DBL
2490 && r_type != R_390_PC64)
2491 || !SYMBOL_CALLS_LOCAL (info, h)))
2492 || (ELIMINATE_COPY_RELOCS
2499 || h->root.type == bfd_link_hash_undefweak
2500 || h->root.type == bfd_link_hash_undefined)))
2502 Elf_Internal_Rela outrel;
2503 bfd_boolean skip, relocate;
2507 /* When generating a shared object, these relocations
2508 are copied into the output file to be resolved at run
2514 _bfd_elf_section_offset (output_bfd, info, input_section,
2516 if (outrel.r_offset == (bfd_vma) -1)
2518 else if (outrel.r_offset == (bfd_vma) -2)
2519 skip = TRUE, relocate = TRUE;
2521 outrel.r_offset += (input_section->output_section->vma
2522 + input_section->output_offset);
2525 memset (&outrel, 0, sizeof outrel);
2528 && (r_type == R_390_PC16
2529 || r_type == R_390_PC16DBL
2530 || r_type == R_390_PC32
2531 || r_type == R_390_PC32DBL
2532 || r_type == R_390_PC64
2534 || !SYMBOLIC_BIND (info, h)
2535 || !h->def_regular))
2537 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2538 outrel.r_addend = rel->r_addend;
2542 /* This symbol is local, or marked to become local. */
2543 outrel.r_addend = relocation + rel->r_addend;
2544 if (r_type == R_390_64)
2547 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2553 if (bfd_is_abs_section (sec))
2555 else if (sec == NULL || sec->owner == NULL)
2557 bfd_set_error(bfd_error_bad_value);
2564 osec = sec->output_section;
2565 sindx = elf_section_data (osec)->dynindx;
2569 osec = htab->elf.text_index_section;
2570 sindx = elf_section_data (osec)->dynindx;
2572 BFD_ASSERT (sindx != 0);
2574 /* We are turning this relocation into one
2575 against a section symbol, so subtract out
2576 the output section's address but not the
2577 offset of the input section in the output
2579 outrel.r_addend -= osec->vma;
2581 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2585 sreloc = elf_section_data (input_section)->sreloc;
2589 loc = sreloc->contents;
2590 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2591 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2593 /* If this reloc is against an external symbol, we do
2594 not want to fiddle with the addend. Otherwise, we
2595 need to include the symbol value so that it becomes
2596 an addend for the dynamic reloc. */
2603 /* Relocations for tls literal pool entries. */
2604 case R_390_TLS_IE64:
2607 Elf_Internal_Rela outrel;
2611 outrel.r_offset = rel->r_offset
2612 + input_section->output_section->vma
2613 + input_section->output_offset;
2614 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2615 sreloc = elf_section_data (input_section)->sreloc;
2618 loc = sreloc->contents;
2619 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2620 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2624 case R_390_TLS_GD64:
2625 case R_390_TLS_GOTIE64:
2626 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2627 tls_type = GOT_UNKNOWN;
2628 if (h == NULL && local_got_offsets)
2629 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2632 tls_type = elf_s390_hash_entry(h)->tls_type;
2633 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2634 r_type = R_390_TLS_LE64;
2636 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2637 r_type = R_390_TLS_IE64;
2639 if (r_type == R_390_TLS_LE64)
2641 /* This relocation gets optimized away by the local exec
2642 access optimization. */
2643 BFD_ASSERT (! unresolved_reloc);
2644 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2645 contents + rel->r_offset);
2649 if (htab->sgot == NULL)
2653 off = h->got.offset;
2656 if (local_got_offsets == NULL)
2659 off = local_got_offsets[r_symndx];
2668 Elf_Internal_Rela outrel;
2672 if (htab->srelgot == NULL)
2675 outrel.r_offset = (htab->sgot->output_section->vma
2676 + htab->sgot->output_offset + off);
2678 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2679 if (r_type == R_390_TLS_GD64)
2680 dr_type = R_390_TLS_DTPMOD;
2682 dr_type = R_390_TLS_TPOFF;
2683 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2684 outrel.r_addend = relocation - dtpoff_base (info);
2686 outrel.r_addend = 0;
2687 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2688 loc = htab->srelgot->contents;
2689 loc += htab->srelgot->reloc_count++
2690 * sizeof (Elf64_External_Rela);
2691 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2693 if (r_type == R_390_TLS_GD64)
2697 BFD_ASSERT (! unresolved_reloc);
2698 bfd_put_64 (output_bfd,
2699 relocation - dtpoff_base (info),
2700 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2704 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2705 outrel.r_offset += GOT_ENTRY_SIZE;
2706 outrel.r_addend = 0;
2707 htab->srelgot->reloc_count++;
2708 loc += sizeof (Elf64_External_Rela);
2709 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2716 local_got_offsets[r_symndx] |= 1;
2719 if (off >= (bfd_vma) -2)
2721 if (r_type == ELF64_R_TYPE (rel->r_info))
2723 relocation = htab->sgot->output_offset + off;
2724 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2725 relocation += htab->sgot->output_section->vma;
2726 unresolved_reloc = FALSE;
2730 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2731 contents + rel->r_offset);
2736 case R_390_TLS_GOTIE12:
2737 case R_390_TLS_GOTIE20:
2738 case R_390_TLS_IEENT:
2741 if (local_got_offsets == NULL)
2743 off = local_got_offsets[r_symndx];
2745 goto emit_tls_relocs;
2749 off = h->got.offset;
2750 tls_type = elf_s390_hash_entry(h)->tls_type;
2751 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2752 goto emit_tls_relocs;
2755 if (htab->sgot == NULL)
2758 BFD_ASSERT (! unresolved_reloc);
2759 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2760 htab->sgot->contents + off);
2761 relocation = htab->sgot->output_offset + off;
2762 if (r_type == R_390_TLS_IEENT)
2763 relocation += htab->sgot->output_section->vma;
2764 unresolved_reloc = FALSE;
2767 case R_390_TLS_LDM64:
2769 /* The literal pool entry this relocation refers to gets ignored
2770 by the optimized code of the local exec model. Do nothing
2771 and the value will turn out zero. */
2774 if (htab->sgot == NULL)
2777 off = htab->tls_ldm_got.offset;
2782 Elf_Internal_Rela outrel;
2785 if (htab->srelgot == NULL)
2788 outrel.r_offset = (htab->sgot->output_section->vma
2789 + htab->sgot->output_offset + off);
2791 bfd_put_64 (output_bfd, 0,
2792 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2793 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2794 outrel.r_addend = 0;
2795 loc = htab->srelgot->contents;
2796 loc += htab->srelgot->reloc_count++
2797 * sizeof (Elf64_External_Rela);
2798 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2799 htab->tls_ldm_got.offset |= 1;
2801 relocation = htab->sgot->output_offset + off;
2802 unresolved_reloc = FALSE;
2805 case R_390_TLS_LE64:
2808 /* Linking a shared library with non-fpic code requires
2809 a R_390_TLS_TPOFF relocation. */
2810 Elf_Internal_Rela outrel;
2815 outrel.r_offset = rel->r_offset
2816 + input_section->output_section->vma
2817 + input_section->output_offset;
2818 if (h != NULL && h->dynindx != -1)
2822 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2824 outrel.r_addend = relocation - dtpoff_base (info);
2826 outrel.r_addend = 0;
2827 sreloc = elf_section_data (input_section)->sreloc;
2830 loc = sreloc->contents;
2831 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2832 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2836 BFD_ASSERT (! unresolved_reloc);
2837 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2838 contents + rel->r_offset);
2842 case R_390_TLS_LDO64:
2843 if (info->shared || (input_section->flags & SEC_DEBUGGING))
2844 relocation -= dtpoff_base (info);
2846 /* When converting LDO to LE, we must negate. */
2847 relocation = -tpoff (info, relocation);
2850 /* Relocations for tls instructions. */
2851 case R_390_TLS_LOAD:
2852 case R_390_TLS_GDCALL:
2853 case R_390_TLS_LDCALL:
2854 tls_type = GOT_UNKNOWN;
2855 if (h == NULL && local_got_offsets)
2856 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2858 tls_type = elf_s390_hash_entry(h)->tls_type;
2860 if (tls_type == GOT_TLS_GD)
2863 if (r_type == R_390_TLS_LOAD)
2865 if (!info->shared && (h == NULL || h->dynindx == -1))
2867 /* IE->LE transition. Four valid cases:
2868 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2869 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2870 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2871 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2872 unsigned int insn0, insn1, ry;
2874 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2875 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2876 if (insn1 != 0x0004)
2877 invalid_tls_insn (input_bfd, input_section, rel);
2879 if ((insn0 & 0xff00f000) == 0xe3000000)
2880 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2881 ry = (insn0 & 0x000f0000);
2882 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2883 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2884 ry = (insn0 & 0x0000f000) << 4;
2885 else if ((insn0 & 0xff00f000) == 0xe300c000)
2886 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2887 ry = (insn0 & 0x000f0000);
2888 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2889 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2890 ry = (insn0 & 0x0000f000) << 4;
2892 invalid_tls_insn (input_bfd, input_section, rel);
2893 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2895 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2896 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2899 else if (r_type == R_390_TLS_GDCALL)
2901 unsigned int insn0, insn1;
2903 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2904 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2905 if ((insn0 & 0xffff0000) != 0xc0e50000)
2906 invalid_tls_insn (input_bfd, input_section, rel);
2907 if (!info->shared && (h == NULL || h->dynindx == -1))
2909 /* GD->LE transition.
2910 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2916 /* GD->IE transition.
2917 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2921 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2922 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2924 else if (r_type == R_390_TLS_LDCALL)
2928 unsigned int insn0, insn1;
2930 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2931 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2932 if ((insn0 & 0xffff0000) != 0xc0e50000)
2933 invalid_tls_insn (input_bfd, input_section, rel);
2934 /* LD->LE transition.
2935 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2938 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2939 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2948 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2949 because such sections are not SEC_ALLOC and thus ld.so will
2950 not process them. */
2951 if (unresolved_reloc
2952 && !((input_section->flags & SEC_DEBUGGING) != 0
2954 && _bfd_elf_section_offset (output_bfd, info, input_section,
2955 rel->r_offset) != (bfd_vma) -1)
2956 (*_bfd_error_handler)
2957 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
2960 (long) rel->r_offset,
2962 h->root.root.string);
2964 if (r_type == R_390_20
2965 || r_type == R_390_GOT20
2966 || r_type == R_390_GOTPLT20
2967 || r_type == R_390_TLS_GOTIE20)
2969 relocation += rel->r_addend;
2970 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
2971 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2972 contents, rel->r_offset,
2976 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2977 contents, rel->r_offset,
2978 relocation, rel->r_addend);
2980 if (r != bfd_reloc_ok)
2985 name = h->root.root.string;
2988 name = bfd_elf_string_from_elf_section (input_bfd,
2989 symtab_hdr->sh_link,
2994 name = bfd_section_name (input_bfd, sec);
2997 if (r == bfd_reloc_overflow)
3000 if (! ((*info->callbacks->reloc_overflow)
3001 (info, (h ? &h->root : NULL), name, howto->name,
3002 (bfd_vma) 0, input_bfd, input_section,
3008 (*_bfd_error_handler)
3009 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3010 input_bfd, input_section,
3011 (long) rel->r_offset, name, (int) r);
3020 /* Finish up dynamic symbol handling. We set the contents of various
3021 dynamic sections here. */
3024 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3025 struct bfd_link_info *info,
3026 struct elf_link_hash_entry *h,
3027 Elf_Internal_Sym *sym)
3029 struct elf_s390_link_hash_table *htab;
3031 htab = elf_s390_hash_table (info);
3035 if (h->plt.offset != (bfd_vma) -1)
3039 Elf_Internal_Rela rela;
3042 /* This symbol has an entry in the procedure linkage table. Set
3045 if (h->dynindx == -1
3046 || htab->splt == NULL
3047 || htab->sgotplt == NULL
3048 || htab->srelplt == NULL)
3052 Current offset - size first entry / entry size. */
3053 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3055 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3057 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3059 /* Fill in the blueprint of a PLT. */
3060 memcpy (htab->splt->contents + h->plt.offset, elf_s390x_plt_entry,
3063 /* Fixup the relative address to the GOT entry */
3064 bfd_put_32 (output_bfd,
3065 (htab->sgotplt->output_section->vma +
3066 htab->sgotplt->output_offset + got_offset
3067 - (htab->splt->output_section->vma + h->plt.offset))/2,
3068 htab->splt->contents + h->plt.offset + 2);
3069 /* Fixup the relative branch to PLT 0 */
3070 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3071 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3072 htab->splt->contents + h->plt.offset + 24);
3073 /* Fixup offset into symbol table */
3074 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3075 htab->splt->contents + h->plt.offset + 28);
3077 /* Fill in the entry in the global offset table.
3078 Points to instruction after GOT offset. */
3079 bfd_put_64 (output_bfd,
3080 (htab->splt->output_section->vma
3081 + htab->splt->output_offset
3084 htab->sgotplt->contents + got_offset);
3086 /* Fill in the entry in the .rela.plt section. */
3087 rela.r_offset = (htab->sgotplt->output_section->vma
3088 + htab->sgotplt->output_offset
3090 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3092 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3093 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3095 if (!h->def_regular)
3097 /* Mark the symbol as undefined, rather than as defined in
3098 the .plt section. Leave the value alone. This is a clue
3099 for the dynamic linker, to make function pointer
3100 comparisons work between an application and shared
3102 sym->st_shndx = SHN_UNDEF;
3106 if (h->got.offset != (bfd_vma) -1
3107 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3108 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3109 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3111 Elf_Internal_Rela rela;
3114 /* This symbol has an entry in the global offset table. Set it
3116 if (htab->sgot == NULL || htab->srelgot == NULL)
3119 rela.r_offset = (htab->sgot->output_section->vma
3120 + htab->sgot->output_offset
3121 + (h->got.offset &~ (bfd_vma) 1));
3123 /* If this is a static link, or it is a -Bsymbolic link and the
3124 symbol is defined locally or was forced to be local because
3125 of a version file, we just want to emit a RELATIVE reloc.
3126 The entry in the global offset table will already have been
3127 initialized in the relocate_section function. */
3129 && SYMBOL_REFERENCES_LOCAL (info, h))
3131 if (!h->def_regular)
3133 BFD_ASSERT((h->got.offset & 1) != 0);
3134 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3135 rela.r_addend = (h->root.u.def.value
3136 + h->root.u.def.section->output_section->vma
3137 + h->root.u.def.section->output_offset);
3141 BFD_ASSERT((h->got.offset & 1) == 0);
3142 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3143 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3147 loc = htab->srelgot->contents;
3148 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3149 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3154 Elf_Internal_Rela rela;
3157 /* This symbols needs a copy reloc. Set it up. */
3159 if (h->dynindx == -1
3160 || (h->root.type != bfd_link_hash_defined
3161 && h->root.type != bfd_link_hash_defweak)
3162 || htab->srelbss == NULL)
3165 rela.r_offset = (h->root.u.def.value
3166 + h->root.u.def.section->output_section->vma
3167 + h->root.u.def.section->output_offset);
3168 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3170 loc = htab->srelbss->contents;
3171 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3172 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3175 /* Mark some specially defined symbols as absolute. */
3176 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3177 || h == htab->elf.hgot
3178 || h == htab->elf.hplt)
3179 sym->st_shndx = SHN_ABS;
3184 /* Used to decide how to sort relocs in an optimal manner for the
3185 dynamic linker, before writing them out. */
3187 static enum elf_reloc_type_class
3188 elf_s390_reloc_type_class (rela)
3189 const Elf_Internal_Rela *rela;
3191 switch ((int) ELF64_R_TYPE (rela->r_info))
3193 case R_390_RELATIVE:
3194 return reloc_class_relative;
3195 case R_390_JMP_SLOT:
3196 return reloc_class_plt;
3198 return reloc_class_copy;
3200 return reloc_class_normal;
3204 /* Finish up the dynamic sections. */
3207 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3208 struct bfd_link_info *info)
3210 struct elf_s390_link_hash_table *htab;
3214 htab = elf_s390_hash_table (info);
3218 dynobj = htab->elf.dynobj;
3219 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3221 if (htab->elf.dynamic_sections_created)
3223 Elf64_External_Dyn *dyncon, *dynconend;
3225 if (sdyn == NULL || htab->sgot == NULL)
3228 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3229 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3230 for (; dyncon < dynconend; dyncon++)
3232 Elf_Internal_Dyn dyn;
3235 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3243 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3247 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3251 s = htab->srelplt->output_section;
3252 dyn.d_un.d_val = s->size;
3256 /* The procedure linkage table relocs (DT_JMPREL) should
3257 not be included in the overall relocs (DT_RELA).
3258 Therefore, we override the DT_RELASZ entry here to
3259 make it not include the JMPREL relocs. Since the
3260 linker script arranges for .rela.plt to follow all
3261 other relocation sections, we don't have to worry
3262 about changing the DT_RELA entry. */
3263 s = htab->srelplt->output_section;
3264 dyn.d_un.d_val -= s->size;
3268 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3271 /* Fill in the special first entry in the procedure linkage table. */
3272 if (htab->splt && htab->splt->size > 0)
3274 /* fill in blueprint for plt 0 entry */
3275 memcpy (htab->splt->contents, elf_s390x_first_plt_entry,
3276 PLT_FIRST_ENTRY_SIZE);
3277 /* Fixup relative address to start of GOT */
3278 bfd_put_32 (output_bfd,
3279 (htab->sgotplt->output_section->vma +
3280 htab->sgotplt->output_offset
3281 - htab->splt->output_section->vma - 6)/2,
3282 htab->splt->contents + 8);
3284 elf_section_data (htab->splt->output_section)
3285 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3290 /* Fill in the first three entries in the global offset table. */
3291 if (htab->sgotplt->size > 0)
3293 bfd_put_64 (output_bfd,
3294 (sdyn == NULL ? (bfd_vma) 0
3295 : sdyn->output_section->vma + sdyn->output_offset),
3296 htab->sgotplt->contents);
3297 /* One entry for shared object struct ptr. */
3298 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3299 /* One entry for _dl_runtime_resolve. */
3300 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3303 elf_section_data (htab->sgot->output_section)
3304 ->this_hdr.sh_entsize = 8;
3309 /* Return address for Ith PLT stub in section PLT, for relocation REL
3310 or (bfd_vma) -1 if it should not be included. */
3313 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3314 const arelent *rel ATTRIBUTE_UNUSED)
3316 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3320 /* Why was the hash table entry size definition changed from
3321 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3322 this is the only reason for the s390_elf64_size_info structure. */
3324 const struct elf_size_info s390_elf64_size_info =
3326 sizeof (Elf64_External_Ehdr),
3327 sizeof (Elf64_External_Phdr),
3328 sizeof (Elf64_External_Shdr),
3329 sizeof (Elf64_External_Rel),
3330 sizeof (Elf64_External_Rela),
3331 sizeof (Elf64_External_Sym),
3332 sizeof (Elf64_External_Dyn),
3333 sizeof (Elf_External_Note),
3334 8, /* hash-table entry size. */
3335 1, /* internal relocations per external relocations. */
3336 64, /* arch_size. */
3337 3, /* log_file_align. */
3338 ELFCLASS64, EV_CURRENT,
3339 bfd_elf64_write_out_phdrs,
3340 bfd_elf64_write_shdrs_and_ehdr,
3341 bfd_elf64_checksum_contents,
3342 bfd_elf64_write_relocs,
3343 bfd_elf64_swap_symbol_in,
3344 bfd_elf64_swap_symbol_out,
3345 bfd_elf64_slurp_reloc_table,
3346 bfd_elf64_slurp_symbol_table,
3347 bfd_elf64_swap_dyn_in,
3348 bfd_elf64_swap_dyn_out,
3349 bfd_elf64_swap_reloc_in,
3350 bfd_elf64_swap_reloc_out,
3351 bfd_elf64_swap_reloca_in,
3352 bfd_elf64_swap_reloca_out
3355 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3356 #define TARGET_BIG_NAME "elf64-s390"
3357 #define ELF_ARCH bfd_arch_s390
3358 #define ELF_TARGET_ID S390_ELF_DATA
3359 #define ELF_MACHINE_CODE EM_S390
3360 #define ELF_MACHINE_ALT1 EM_S390_OLD
3361 #define ELF_MAXPAGESIZE 0x1000
3363 #define elf_backend_size_info s390_elf64_size_info
3365 #define elf_backend_can_gc_sections 1
3366 #define elf_backend_can_refcount 1
3367 #define elf_backend_want_got_plt 1
3368 #define elf_backend_plt_readonly 1
3369 #define elf_backend_want_plt_sym 0
3370 #define elf_backend_got_header_size 24
3371 #define elf_backend_rela_normal 1
3373 #define elf_info_to_howto elf_s390_info_to_howto
3375 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3376 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3377 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3378 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3380 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3381 #define elf_backend_check_relocs elf_s390_check_relocs
3382 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3383 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3384 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3385 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3386 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3387 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3388 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3389 #define elf_backend_relocate_section elf_s390_relocate_section
3390 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3391 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3392 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3393 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3395 #define bfd_elf64_mkobject elf_s390_mkobject
3396 #define elf_backend_object_p elf_s390_object_p
3398 #include "elf64-target.h"