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 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. */
1635 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1636 h->root.root.string);
1640 /* We must allocate the symbol in our .dynbss section, which will
1641 become part of the .bss section of the executable. There will be
1642 an entry for this symbol in the .dynsym section. The dynamic
1643 object will contain position independent code, so all references
1644 from the dynamic object to this symbol will go through the global
1645 offset table. The dynamic linker will use the .dynsym entry to
1646 determine the address it must put in the global offset table, so
1647 both the dynamic object and the regular object will refer to the
1648 same memory location for the variable. */
1650 htab = elf_s390_hash_table (info);
1654 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1655 copy the initial value out of the dynamic object and into the
1656 runtime process image. */
1657 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1659 htab->srelbss->size += sizeof (Elf64_External_Rela);
1665 return _bfd_elf_adjust_dynamic_copy (h, s);
1668 /* Allocate space in .plt, .got and associated reloc sections for
1672 allocate_dynrelocs (struct elf_link_hash_entry *h,
1675 struct bfd_link_info *info;
1676 struct elf_s390_link_hash_table *htab;
1677 struct elf_s390_link_hash_entry *eh;
1678 struct elf_s390_dyn_relocs *p;
1680 if (h->root.type == bfd_link_hash_indirect)
1683 info = (struct bfd_link_info *) inf;
1684 htab = elf_s390_hash_table (info);
1688 if (htab->elf.dynamic_sections_created
1689 && h->plt.refcount > 0)
1691 /* Make sure this symbol is output as a dynamic symbol.
1692 Undefined weak syms won't yet be marked as dynamic. */
1693 if (h->dynindx == -1
1694 && !h->forced_local)
1696 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1701 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1703 asection *s = htab->splt;
1705 /* If this is the first .plt entry, make room for the special
1708 s->size += PLT_FIRST_ENTRY_SIZE;
1710 h->plt.offset = s->size;
1712 /* If this symbol is not defined in a regular file, and we are
1713 not generating a shared library, then set the symbol to this
1714 location in the .plt. This is required to make function
1715 pointers compare as equal between the normal executable and
1716 the shared library. */
1720 h->root.u.def.section = s;
1721 h->root.u.def.value = h->plt.offset;
1724 /* Make room for this entry. */
1725 s->size += PLT_ENTRY_SIZE;
1727 /* We also need to make an entry in the .got.plt section, which
1728 will be placed in the .got section by the linker script. */
1729 htab->sgotplt->size += GOT_ENTRY_SIZE;
1731 /* We also need to make an entry in the .rela.plt section. */
1732 htab->srelplt->size += sizeof (Elf64_External_Rela);
1736 h->plt.offset = (bfd_vma) -1;
1738 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1743 h->plt.offset = (bfd_vma) -1;
1745 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1748 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1749 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1750 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1751 we can save the dynamic TLS relocation. */
1752 if (h->got.refcount > 0
1755 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1757 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1758 /* For the GOTIE access without a literal pool entry the offset has
1759 to be stored somewhere. The immediate value in the instruction
1760 is not bit enough so the value is stored in the got. */
1762 h->got.offset = htab->sgot->size;
1763 htab->sgot->size += GOT_ENTRY_SIZE;
1766 h->got.offset = (bfd_vma) -1;
1768 else if (h->got.refcount > 0)
1772 int tls_type = elf_s390_hash_entry(h)->tls_type;
1774 /* Make sure this symbol is output as a dynamic symbol.
1775 Undefined weak syms won't yet be marked as dynamic. */
1776 if (h->dynindx == -1
1777 && !h->forced_local)
1779 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1784 h->got.offset = s->size;
1785 s->size += GOT_ENTRY_SIZE;
1786 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1787 if (tls_type == GOT_TLS_GD)
1788 s->size += GOT_ENTRY_SIZE;
1789 dyn = htab->elf.dynamic_sections_created;
1790 /* R_390_TLS_IE64 needs one dynamic relocation,
1791 R_390_TLS_GD64 needs one if local symbol and two if global. */
1792 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1793 || tls_type >= GOT_TLS_IE)
1794 htab->srelgot->size += sizeof (Elf64_External_Rela);
1795 else if (tls_type == GOT_TLS_GD)
1796 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1797 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1798 || h->root.type != bfd_link_hash_undefweak)
1800 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1801 htab->srelgot->size += sizeof (Elf64_External_Rela);
1804 h->got.offset = (bfd_vma) -1;
1806 eh = (struct elf_s390_link_hash_entry *) h;
1807 if (eh->dyn_relocs == NULL)
1810 /* In the shared -Bsymbolic case, discard space allocated for
1811 dynamic pc-relative relocs against symbols which turn out to be
1812 defined in regular objects. For the normal shared case, discard
1813 space for pc-relative relocs that have become local due to symbol
1814 visibility changes. */
1818 if (SYMBOL_CALLS_LOCAL (info, h))
1820 struct elf_s390_dyn_relocs **pp;
1822 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1824 p->count -= p->pc_count;
1833 /* Also discard relocs on undefined weak syms with non-default
1835 if (eh->dyn_relocs != NULL
1836 && h->root.type == bfd_link_hash_undefweak)
1838 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1839 eh->dyn_relocs = NULL;
1841 /* Make sure undefined weak symbols are output as a dynamic
1843 else if (h->dynindx == -1
1844 && !h->forced_local)
1846 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1851 else if (ELIMINATE_COPY_RELOCS)
1853 /* For the non-shared case, discard space for relocs against
1854 symbols which turn out to need copy relocs or are not
1860 || (htab->elf.dynamic_sections_created
1861 && (h->root.type == bfd_link_hash_undefweak
1862 || h->root.type == bfd_link_hash_undefined))))
1864 /* Make sure this symbol is output as a dynamic symbol.
1865 Undefined weak syms won't yet be marked as dynamic. */
1866 if (h->dynindx == -1
1867 && !h->forced_local)
1869 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1873 /* If that succeeded, we know we'll be keeping all the
1875 if (h->dynindx != -1)
1879 eh->dyn_relocs = NULL;
1884 /* Finally, allocate space. */
1885 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1887 asection *sreloc = elf_section_data (p->sec)->sreloc;
1888 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1894 /* Find any dynamic relocs that apply to read-only sections. */
1897 readonly_dynrelocs (h, inf)
1898 struct elf_link_hash_entry *h;
1901 struct elf_s390_link_hash_entry *eh;
1902 struct elf_s390_dyn_relocs *p;
1904 eh = (struct elf_s390_link_hash_entry *) h;
1905 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1907 asection *s = p->sec->output_section;
1909 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1911 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1913 info->flags |= DF_TEXTREL;
1915 /* Not an error, just cut short the traversal. */
1922 /* Set the sizes of the dynamic sections. */
1925 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1926 struct bfd_link_info *info)
1928 struct elf_s390_link_hash_table *htab;
1934 htab = elf_s390_hash_table (info);
1938 dynobj = htab->elf.dynobj;
1942 if (htab->elf.dynamic_sections_created)
1944 /* Set the contents of the .interp section to the interpreter. */
1945 if (info->executable)
1947 s = bfd_get_section_by_name (dynobj, ".interp");
1950 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1951 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1955 /* Set up .got offsets for local syms, and space for local dynamic
1957 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1959 bfd_signed_vma *local_got;
1960 bfd_signed_vma *end_local_got;
1961 char *local_tls_type;
1962 bfd_size_type locsymcount;
1963 Elf_Internal_Shdr *symtab_hdr;
1966 if (! is_s390_elf (ibfd))
1969 for (s = ibfd->sections; s != NULL; s = s->next)
1971 struct elf_s390_dyn_relocs *p;
1973 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1975 if (!bfd_is_abs_section (p->sec)
1976 && bfd_is_abs_section (p->sec->output_section))
1978 /* Input section has been discarded, either because
1979 it is a copy of a linkonce section or due to
1980 linker script /DISCARD/, so we'll be discarding
1983 else if (p->count != 0)
1985 srela = elf_section_data (p->sec)->sreloc;
1986 srela->size += p->count * sizeof (Elf64_External_Rela);
1987 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1988 info->flags |= DF_TEXTREL;
1993 local_got = elf_local_got_refcounts (ibfd);
1997 symtab_hdr = &elf_symtab_hdr (ibfd);
1998 locsymcount = symtab_hdr->sh_info;
1999 end_local_got = local_got + locsymcount;
2000 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2002 srela = htab->srelgot;
2003 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2007 *local_got = s->size;
2008 s->size += GOT_ENTRY_SIZE;
2009 if (*local_tls_type == GOT_TLS_GD)
2010 s->size += GOT_ENTRY_SIZE;
2012 srela->size += sizeof (Elf64_External_Rela);
2015 *local_got = (bfd_vma) -1;
2019 if (htab->tls_ldm_got.refcount > 0)
2021 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2023 htab->tls_ldm_got.offset = htab->sgot->size;
2024 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2025 htab->srelgot->size += sizeof (Elf64_External_Rela);
2028 htab->tls_ldm_got.offset = -1;
2030 /* Allocate global sym .plt and .got entries, and space for global
2031 sym dynamic relocs. */
2032 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2034 /* We now have determined the sizes of the various dynamic sections.
2035 Allocate memory for them. */
2037 for (s = dynobj->sections; s != NULL; s = s->next)
2039 if ((s->flags & SEC_LINKER_CREATED) == 0)
2044 || s == htab->sgotplt
2045 || s == htab->sdynbss)
2047 /* Strip this section if we don't need it; see the
2050 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2052 if (s->size != 0 && s != htab->srelplt)
2055 /* We use the reloc_count field as a counter if we need
2056 to copy relocs into the output file. */
2061 /* It's not one of our sections, so don't allocate space. */
2067 /* If we don't need this section, strip it from the
2068 output file. This is to handle .rela.bss and
2069 .rela.plt. We must create it in
2070 create_dynamic_sections, because it must be created
2071 before the linker maps input sections to output
2072 sections. The linker does that before
2073 adjust_dynamic_symbol is called, and it is that
2074 function which decides whether anything needs to go
2075 into these sections. */
2077 s->flags |= SEC_EXCLUDE;
2081 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2084 /* Allocate memory for the section contents. We use bfd_zalloc
2085 here in case unused entries are not reclaimed before the
2086 section's contents are written out. This should not happen,
2087 but this way if it does, we get a R_390_NONE reloc instead
2089 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2090 if (s->contents == NULL)
2094 if (htab->elf.dynamic_sections_created)
2096 /* Add some entries to the .dynamic section. We fill in the
2097 values later, in elf_s390_finish_dynamic_sections, but we
2098 must add the entries now so that we get the correct size for
2099 the .dynamic section. The DT_DEBUG entry is filled in by the
2100 dynamic linker and used by the debugger. */
2101 #define add_dynamic_entry(TAG, VAL) \
2102 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2104 if (info->executable)
2106 if (!add_dynamic_entry (DT_DEBUG, 0))
2110 if (htab->splt->size != 0)
2112 if (!add_dynamic_entry (DT_PLTGOT, 0)
2113 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2114 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2115 || !add_dynamic_entry (DT_JMPREL, 0))
2121 if (!add_dynamic_entry (DT_RELA, 0)
2122 || !add_dynamic_entry (DT_RELASZ, 0)
2123 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2126 /* If any dynamic relocs apply to a read-only section,
2127 then we need a DT_TEXTREL entry. */
2128 if ((info->flags & DF_TEXTREL) == 0)
2129 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2132 if ((info->flags & DF_TEXTREL) != 0)
2134 if (!add_dynamic_entry (DT_TEXTREL, 0))
2139 #undef add_dynamic_entry
2144 /* Return the base VMA address which should be subtracted from real addresses
2145 when resolving @dtpoff relocation.
2146 This is PT_TLS segment p_vaddr. */
2150 struct bfd_link_info *info;
2152 /* If tls_sec is NULL, we should have signalled an error already. */
2153 if (elf_hash_table (info)->tls_sec == NULL)
2155 return elf_hash_table (info)->tls_sec->vma;
2158 /* Return the relocation value for @tpoff relocation
2159 if STT_TLS virtual address is ADDRESS. */
2162 tpoff (info, address)
2163 struct bfd_link_info *info;
2166 struct elf_link_hash_table *htab = elf_hash_table (info);
2168 /* If tls_sec is NULL, we should have signalled an error already. */
2169 if (htab->tls_sec == NULL)
2171 return htab->tls_size + htab->tls_sec->vma - address;
2174 /* Complain if TLS instruction relocation is against an invalid
2178 invalid_tls_insn (input_bfd, input_section, rel)
2180 asection *input_section;
2181 Elf_Internal_Rela *rel;
2183 reloc_howto_type *howto;
2185 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2186 (*_bfd_error_handler)
2187 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2190 (long) rel->r_offset,
2192 bfd_set_error (bfd_error_bad_value);
2195 /* Relocate a 390 ELF section. */
2198 elf_s390_relocate_section (bfd *output_bfd,
2199 struct bfd_link_info *info,
2201 asection *input_section,
2203 Elf_Internal_Rela *relocs,
2204 Elf_Internal_Sym *local_syms,
2205 asection **local_sections)
2207 struct elf_s390_link_hash_table *htab;
2208 Elf_Internal_Shdr *symtab_hdr;
2209 struct elf_link_hash_entry **sym_hashes;
2210 bfd_vma *local_got_offsets;
2211 Elf_Internal_Rela *rel;
2212 Elf_Internal_Rela *relend;
2214 BFD_ASSERT (is_s390_elf (input_bfd));
2216 htab = elf_s390_hash_table (info);
2220 symtab_hdr = &elf_symtab_hdr (input_bfd);
2221 sym_hashes = elf_sym_hashes (input_bfd);
2222 local_got_offsets = elf_local_got_offsets (input_bfd);
2225 relend = relocs + input_section->reloc_count;
2226 for (; rel < relend; rel++)
2228 unsigned int r_type;
2229 reloc_howto_type *howto;
2230 unsigned long r_symndx;
2231 struct elf_link_hash_entry *h;
2232 Elf_Internal_Sym *sym;
2236 bfd_boolean unresolved_reloc;
2237 bfd_reloc_status_type r;
2240 r_type = ELF64_R_TYPE (rel->r_info);
2241 if (r_type == (int) R_390_GNU_VTINHERIT
2242 || r_type == (int) R_390_GNU_VTENTRY)
2244 if (r_type >= (int) R_390_max)
2246 bfd_set_error (bfd_error_bad_value);
2250 howto = elf_howto_table + r_type;
2251 r_symndx = ELF64_R_SYM (rel->r_info);
2256 unresolved_reloc = FALSE;
2257 if (r_symndx < symtab_hdr->sh_info)
2259 sym = local_syms + r_symndx;
2260 sec = local_sections[r_symndx];
2261 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2265 bfd_boolean warned ATTRIBUTE_UNUSED;
2267 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2268 r_symndx, symtab_hdr, sym_hashes,
2270 unresolved_reloc, warned);
2273 if (sec != NULL && elf_discarded_section (sec))
2274 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2275 rel, relend, howto, contents);
2277 if (info->relocatable)
2282 case R_390_GOTPLT12:
2283 case R_390_GOTPLT16:
2284 case R_390_GOTPLT20:
2285 case R_390_GOTPLT32:
2286 case R_390_GOTPLT64:
2287 case R_390_GOTPLTENT:
2288 /* There are three cases for a GOTPLT relocation. 1) The
2289 relocation is against the jump slot entry of a plt that
2290 will get emitted to the output file. 2) The relocation
2291 is against the jump slot of a plt entry that has been
2292 removed. elf_s390_adjust_gotplt has created a GOT entry
2293 as replacement. 3) The relocation is against a local symbol.
2294 Cases 2) and 3) are the same as the GOT relocation code
2295 so we just have to test for case 1 and fall through for
2297 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2302 Current offset - size first entry / entry size. */
2303 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2306 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2308 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2309 unresolved_reloc = FALSE;
2311 if (r_type == R_390_GOTPLTENT)
2312 relocation += htab->sgot->output_section->vma;
2323 /* Relocation is to the entry for this symbol in the global
2325 if (htab->sgot == NULL)
2332 off = h->got.offset;
2333 dyn = htab->elf.dynamic_sections_created;
2334 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2336 && SYMBOL_REFERENCES_LOCAL (info, h))
2337 || (ELF_ST_VISIBILITY (h->other)
2338 && h->root.type == bfd_link_hash_undefweak))
2340 /* This is actually a static link, or it is a
2341 -Bsymbolic link and the symbol is defined
2342 locally, or the symbol was forced to be local
2343 because of a version file. We must initialize
2344 this entry in the global offset table. Since the
2345 offset must always be a multiple of 2, we use the
2346 least significant bit to record whether we have
2347 initialized it already.
2349 When doing a dynamic link, we create a .rel.got
2350 relocation entry to initialize the value. This
2351 is done in the finish_dynamic_symbol routine. */
2356 bfd_put_64 (output_bfd, relocation,
2357 htab->sgot->contents + off);
2362 unresolved_reloc = FALSE;
2366 if (local_got_offsets == NULL)
2369 off = local_got_offsets[r_symndx];
2371 /* The offset must always be a multiple of 8. We use
2372 the least significant bit to record whether we have
2373 already generated the necessary reloc. */
2378 bfd_put_64 (output_bfd, relocation,
2379 htab->sgot->contents + off);
2384 Elf_Internal_Rela outrel;
2391 outrel.r_offset = (htab->sgot->output_section->vma
2392 + htab->sgot->output_offset
2394 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2395 outrel.r_addend = relocation;
2397 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2398 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2401 local_got_offsets[r_symndx] |= 1;
2405 if (off >= (bfd_vma) -2)
2408 relocation = htab->sgot->output_offset + off;
2410 /* For @GOTENT the relocation is against the offset between
2411 the instruction and the symbols entry in the GOT and not
2412 between the start of the GOT and the symbols entry. We
2413 add the vma of the GOT to get the correct value. */
2414 if ( r_type == R_390_GOTENT
2415 || r_type == R_390_GOTPLTENT)
2416 relocation += htab->sgot->output_section->vma;
2420 case R_390_GOTOFF16:
2421 case R_390_GOTOFF32:
2422 case R_390_GOTOFF64:
2423 /* Relocation is relative to the start of the global offset
2426 /* Note that sgot->output_offset is not involved in this
2427 calculation. We always want the start of .got. If we
2428 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2429 permitted by the ABI, we might have to change this
2431 relocation -= htab->sgot->output_section->vma;
2435 case R_390_GOTPCDBL:
2436 /* Use global offset table as symbol value. */
2437 relocation = htab->sgot->output_section->vma;
2438 unresolved_reloc = FALSE;
2441 case R_390_PLT16DBL:
2443 case R_390_PLT32DBL:
2445 /* Relocation is to the entry for this symbol in the
2446 procedure linkage table. */
2448 /* Resolve a PLT32 reloc against a local symbol directly,
2449 without using the procedure linkage table. */
2453 if (h->plt.offset == (bfd_vma) -1
2454 || htab->splt == NULL)
2456 /* We didn't make a PLT entry for this symbol. This
2457 happens when statically linking PIC code, or when
2458 using -Bsymbolic. */
2462 relocation = (htab->splt->output_section->vma
2463 + htab->splt->output_offset
2465 unresolved_reloc = FALSE;
2468 case R_390_PLTOFF16:
2469 case R_390_PLTOFF32:
2470 case R_390_PLTOFF64:
2471 /* Relocation is to the entry for this symbol in the
2472 procedure linkage table relative to the start of the GOT. */
2474 /* For local symbols or if we didn't make a PLT entry for
2475 this symbol resolve the symbol directly. */
2477 || h->plt.offset == (bfd_vma) -1
2478 || htab->splt == NULL)
2480 relocation -= htab->sgot->output_section->vma;
2484 relocation = (htab->splt->output_section->vma
2485 + htab->splt->output_offset
2487 - htab->sgot->output_section->vma);
2488 unresolved_reloc = FALSE;
2500 if ((input_section->flags & SEC_ALLOC) == 0)
2505 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2506 || h->root.type != bfd_link_hash_undefweak)
2507 && ((r_type != R_390_PC16
2508 && r_type != R_390_PC16DBL
2509 && r_type != R_390_PC32
2510 && r_type != R_390_PC32DBL
2511 && r_type != R_390_PC64)
2512 || !SYMBOL_CALLS_LOCAL (info, h)))
2513 || (ELIMINATE_COPY_RELOCS
2520 || h->root.type == bfd_link_hash_undefweak
2521 || h->root.type == bfd_link_hash_undefined)))
2523 Elf_Internal_Rela outrel;
2524 bfd_boolean skip, relocate;
2528 /* When generating a shared object, these relocations
2529 are copied into the output file to be resolved at run
2535 _bfd_elf_section_offset (output_bfd, info, input_section,
2537 if (outrel.r_offset == (bfd_vma) -1)
2539 else if (outrel.r_offset == (bfd_vma) -2)
2540 skip = TRUE, relocate = TRUE;
2542 outrel.r_offset += (input_section->output_section->vma
2543 + input_section->output_offset);
2546 memset (&outrel, 0, sizeof outrel);
2549 && (r_type == R_390_PC16
2550 || r_type == R_390_PC16DBL
2551 || r_type == R_390_PC32
2552 || r_type == R_390_PC32DBL
2553 || r_type == R_390_PC64
2555 || !SYMBOLIC_BIND (info, h)
2556 || !h->def_regular))
2558 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2559 outrel.r_addend = rel->r_addend;
2563 /* This symbol is local, or marked to become local. */
2564 outrel.r_addend = relocation + rel->r_addend;
2565 if (r_type == R_390_64)
2568 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2574 if (bfd_is_abs_section (sec))
2576 else if (sec == NULL || sec->owner == NULL)
2578 bfd_set_error(bfd_error_bad_value);
2585 osec = sec->output_section;
2586 sindx = elf_section_data (osec)->dynindx;
2590 osec = htab->elf.text_index_section;
2591 sindx = elf_section_data (osec)->dynindx;
2593 BFD_ASSERT (sindx != 0);
2595 /* We are turning this relocation into one
2596 against a section symbol, so subtract out
2597 the output section's address but not the
2598 offset of the input section in the output
2600 outrel.r_addend -= osec->vma;
2602 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2606 sreloc = elf_section_data (input_section)->sreloc;
2610 loc = sreloc->contents;
2611 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2612 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2614 /* If this reloc is against an external symbol, we do
2615 not want to fiddle with the addend. Otherwise, we
2616 need to include the symbol value so that it becomes
2617 an addend for the dynamic reloc. */
2624 /* Relocations for tls literal pool entries. */
2625 case R_390_TLS_IE64:
2628 Elf_Internal_Rela outrel;
2632 outrel.r_offset = rel->r_offset
2633 + input_section->output_section->vma
2634 + input_section->output_offset;
2635 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2636 sreloc = elf_section_data (input_section)->sreloc;
2639 loc = sreloc->contents;
2640 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2641 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2645 case R_390_TLS_GD64:
2646 case R_390_TLS_GOTIE64:
2647 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2648 tls_type = GOT_UNKNOWN;
2649 if (h == NULL && local_got_offsets)
2650 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2653 tls_type = elf_s390_hash_entry(h)->tls_type;
2654 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2655 r_type = R_390_TLS_LE64;
2657 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2658 r_type = R_390_TLS_IE64;
2660 if (r_type == R_390_TLS_LE64)
2662 /* This relocation gets optimized away by the local exec
2663 access optimization. */
2664 BFD_ASSERT (! unresolved_reloc);
2665 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2666 contents + rel->r_offset);
2670 if (htab->sgot == NULL)
2674 off = h->got.offset;
2677 if (local_got_offsets == NULL)
2680 off = local_got_offsets[r_symndx];
2689 Elf_Internal_Rela outrel;
2693 if (htab->srelgot == NULL)
2696 outrel.r_offset = (htab->sgot->output_section->vma
2697 + htab->sgot->output_offset + off);
2699 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2700 if (r_type == R_390_TLS_GD64)
2701 dr_type = R_390_TLS_DTPMOD;
2703 dr_type = R_390_TLS_TPOFF;
2704 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2705 outrel.r_addend = relocation - dtpoff_base (info);
2707 outrel.r_addend = 0;
2708 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2709 loc = htab->srelgot->contents;
2710 loc += htab->srelgot->reloc_count++
2711 * sizeof (Elf64_External_Rela);
2712 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2714 if (r_type == R_390_TLS_GD64)
2718 BFD_ASSERT (! unresolved_reloc);
2719 bfd_put_64 (output_bfd,
2720 relocation - dtpoff_base (info),
2721 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2725 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2726 outrel.r_offset += GOT_ENTRY_SIZE;
2727 outrel.r_addend = 0;
2728 htab->srelgot->reloc_count++;
2729 loc += sizeof (Elf64_External_Rela);
2730 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2737 local_got_offsets[r_symndx] |= 1;
2740 if (off >= (bfd_vma) -2)
2742 if (r_type == ELF64_R_TYPE (rel->r_info))
2744 relocation = htab->sgot->output_offset + off;
2745 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2746 relocation += htab->sgot->output_section->vma;
2747 unresolved_reloc = FALSE;
2751 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2752 contents + rel->r_offset);
2757 case R_390_TLS_GOTIE12:
2758 case R_390_TLS_GOTIE20:
2759 case R_390_TLS_IEENT:
2762 if (local_got_offsets == NULL)
2764 off = local_got_offsets[r_symndx];
2766 goto emit_tls_relocs;
2770 off = h->got.offset;
2771 tls_type = elf_s390_hash_entry(h)->tls_type;
2772 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2773 goto emit_tls_relocs;
2776 if (htab->sgot == NULL)
2779 BFD_ASSERT (! unresolved_reloc);
2780 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2781 htab->sgot->contents + off);
2782 relocation = htab->sgot->output_offset + off;
2783 if (r_type == R_390_TLS_IEENT)
2784 relocation += htab->sgot->output_section->vma;
2785 unresolved_reloc = FALSE;
2788 case R_390_TLS_LDM64:
2790 /* The literal pool entry this relocation refers to gets ignored
2791 by the optimized code of the local exec model. Do nothing
2792 and the value will turn out zero. */
2795 if (htab->sgot == NULL)
2798 off = htab->tls_ldm_got.offset;
2803 Elf_Internal_Rela outrel;
2806 if (htab->srelgot == NULL)
2809 outrel.r_offset = (htab->sgot->output_section->vma
2810 + htab->sgot->output_offset + off);
2812 bfd_put_64 (output_bfd, 0,
2813 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2814 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2815 outrel.r_addend = 0;
2816 loc = htab->srelgot->contents;
2817 loc += htab->srelgot->reloc_count++
2818 * sizeof (Elf64_External_Rela);
2819 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2820 htab->tls_ldm_got.offset |= 1;
2822 relocation = htab->sgot->output_offset + off;
2823 unresolved_reloc = FALSE;
2826 case R_390_TLS_LE64:
2829 /* Linking a shared library with non-fpic code requires
2830 a R_390_TLS_TPOFF relocation. */
2831 Elf_Internal_Rela outrel;
2836 outrel.r_offset = rel->r_offset
2837 + input_section->output_section->vma
2838 + input_section->output_offset;
2839 if (h != NULL && h->dynindx != -1)
2843 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2845 outrel.r_addend = relocation - dtpoff_base (info);
2847 outrel.r_addend = 0;
2848 sreloc = elf_section_data (input_section)->sreloc;
2851 loc = sreloc->contents;
2852 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2853 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2857 BFD_ASSERT (! unresolved_reloc);
2858 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2859 contents + rel->r_offset);
2863 case R_390_TLS_LDO64:
2865 relocation -= dtpoff_base (info);
2867 /* When converting LDO to LE, we must negate. */
2868 relocation = -tpoff (info, relocation);
2871 /* Relocations for tls instructions. */
2872 case R_390_TLS_LOAD:
2873 case R_390_TLS_GDCALL:
2874 case R_390_TLS_LDCALL:
2875 tls_type = GOT_UNKNOWN;
2876 if (h == NULL && local_got_offsets)
2877 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2879 tls_type = elf_s390_hash_entry(h)->tls_type;
2881 if (tls_type == GOT_TLS_GD)
2884 if (r_type == R_390_TLS_LOAD)
2886 if (!info->shared && (h == NULL || h->dynindx == -1))
2888 /* IE->LE transition. Four valid cases:
2889 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2890 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2891 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2892 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2893 unsigned int insn0, insn1, ry;
2895 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2896 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2897 if (insn1 != 0x0004)
2898 invalid_tls_insn (input_bfd, input_section, rel);
2900 if ((insn0 & 0xff00f000) == 0xe3000000)
2901 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2902 ry = (insn0 & 0x000f0000);
2903 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2904 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2905 ry = (insn0 & 0x0000f000) << 4;
2906 else if ((insn0 & 0xff00f000) == 0xe300c000)
2907 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2908 ry = (insn0 & 0x000f0000);
2909 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2910 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2911 ry = (insn0 & 0x0000f000) << 4;
2913 invalid_tls_insn (input_bfd, input_section, rel);
2914 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2916 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2917 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2920 else if (r_type == R_390_TLS_GDCALL)
2922 unsigned int insn0, insn1;
2924 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2925 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2926 if ((insn0 & 0xffff0000) != 0xc0e50000)
2927 invalid_tls_insn (input_bfd, input_section, rel);
2928 if (!info->shared && (h == NULL || h->dynindx == -1))
2930 /* GD->LE transition.
2931 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2937 /* GD->IE transition.
2938 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2942 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2943 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2945 else if (r_type == R_390_TLS_LDCALL)
2949 unsigned int insn0, insn1;
2951 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2952 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2953 if ((insn0 & 0xffff0000) != 0xc0e50000)
2954 invalid_tls_insn (input_bfd, input_section, rel);
2955 /* LD->LE transition.
2956 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2959 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2960 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2969 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2970 because such sections are not SEC_ALLOC and thus ld.so will
2971 not process them. */
2972 if (unresolved_reloc
2973 && !((input_section->flags & SEC_DEBUGGING) != 0
2975 (*_bfd_error_handler)
2976 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
2979 (long) rel->r_offset,
2981 h->root.root.string);
2983 if (r_type == R_390_20
2984 || r_type == R_390_GOT20
2985 || r_type == R_390_GOTPLT20
2986 || r_type == R_390_TLS_GOTIE20)
2988 relocation += rel->r_addend;
2989 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
2990 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2991 contents, rel->r_offset,
2995 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2996 contents, rel->r_offset,
2997 relocation, rel->r_addend);
2999 if (r != bfd_reloc_ok)
3004 name = h->root.root.string;
3007 name = bfd_elf_string_from_elf_section (input_bfd,
3008 symtab_hdr->sh_link,
3013 name = bfd_section_name (input_bfd, sec);
3016 if (r == bfd_reloc_overflow)
3019 if (! ((*info->callbacks->reloc_overflow)
3020 (info, (h ? &h->root : NULL), name, howto->name,
3021 (bfd_vma) 0, input_bfd, input_section,
3027 (*_bfd_error_handler)
3028 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3029 input_bfd, input_section,
3030 (long) rel->r_offset, name, (int) r);
3039 /* Finish up dynamic symbol handling. We set the contents of various
3040 dynamic sections here. */
3043 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3044 struct bfd_link_info *info,
3045 struct elf_link_hash_entry *h,
3046 Elf_Internal_Sym *sym)
3048 struct elf_s390_link_hash_table *htab;
3050 htab = elf_s390_hash_table (info);
3054 if (h->plt.offset != (bfd_vma) -1)
3058 Elf_Internal_Rela rela;
3061 /* This symbol has an entry in the procedure linkage table. Set
3064 if (h->dynindx == -1
3065 || htab->splt == NULL
3066 || htab->sgotplt == NULL
3067 || htab->srelplt == NULL)
3071 Current offset - size first entry / entry size. */
3072 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3074 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3076 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3078 /* Fill in the blueprint of a PLT. */
3079 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3080 htab->splt->contents + h->plt.offset);
3081 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3082 htab->splt->contents + h->plt.offset + 4);
3083 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3084 htab->splt->contents + h->plt.offset + 8);
3085 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3086 htab->splt->contents + h->plt.offset + 12);
3087 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3088 htab->splt->contents + h->plt.offset + 16);
3089 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3090 htab->splt->contents + h->plt.offset + 20);
3091 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3092 htab->splt->contents + h->plt.offset + 24);
3093 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3094 htab->splt->contents + h->plt.offset + 28);
3095 /* Fixup the relative address to the GOT entry */
3096 bfd_put_32 (output_bfd,
3097 (htab->sgotplt->output_section->vma +
3098 htab->sgotplt->output_offset + got_offset
3099 - (htab->splt->output_section->vma + h->plt.offset))/2,
3100 htab->splt->contents + h->plt.offset + 2);
3101 /* Fixup the relative branch to PLT 0 */
3102 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3103 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3104 htab->splt->contents + h->plt.offset + 24);
3105 /* Fixup offset into symbol table */
3106 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3107 htab->splt->contents + h->plt.offset + 28);
3109 /* Fill in the entry in the global offset table.
3110 Points to instruction after GOT offset. */
3111 bfd_put_64 (output_bfd,
3112 (htab->splt->output_section->vma
3113 + htab->splt->output_offset
3116 htab->sgotplt->contents + got_offset);
3118 /* Fill in the entry in the .rela.plt section. */
3119 rela.r_offset = (htab->sgotplt->output_section->vma
3120 + htab->sgotplt->output_offset
3122 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3124 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3125 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3127 if (!h->def_regular)
3129 /* Mark the symbol as undefined, rather than as defined in
3130 the .plt section. Leave the value alone. This is a clue
3131 for the dynamic linker, to make function pointer
3132 comparisons work between an application and shared
3134 sym->st_shndx = SHN_UNDEF;
3138 if (h->got.offset != (bfd_vma) -1
3139 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3140 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3141 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3143 Elf_Internal_Rela rela;
3146 /* This symbol has an entry in the global offset table. Set it
3148 if (htab->sgot == NULL || htab->srelgot == NULL)
3151 rela.r_offset = (htab->sgot->output_section->vma
3152 + htab->sgot->output_offset
3153 + (h->got.offset &~ (bfd_vma) 1));
3155 /* If this is a static link, or it is a -Bsymbolic link and the
3156 symbol is defined locally or was forced to be local because
3157 of a version file, we just want to emit a RELATIVE reloc.
3158 The entry in the global offset table will already have been
3159 initialized in the relocate_section function. */
3161 && SYMBOL_REFERENCES_LOCAL (info, h))
3163 if (!h->def_regular)
3165 BFD_ASSERT((h->got.offset & 1) != 0);
3166 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3167 rela.r_addend = (h->root.u.def.value
3168 + h->root.u.def.section->output_section->vma
3169 + h->root.u.def.section->output_offset);
3173 BFD_ASSERT((h->got.offset & 1) == 0);
3174 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3175 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3179 loc = htab->srelgot->contents;
3180 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3181 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3186 Elf_Internal_Rela rela;
3189 /* This symbols needs a copy reloc. Set it up. */
3191 if (h->dynindx == -1
3192 || (h->root.type != bfd_link_hash_defined
3193 && h->root.type != bfd_link_hash_defweak)
3194 || htab->srelbss == NULL)
3197 rela.r_offset = (h->root.u.def.value
3198 + h->root.u.def.section->output_section->vma
3199 + h->root.u.def.section->output_offset);
3200 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3202 loc = htab->srelbss->contents;
3203 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3204 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3207 /* Mark some specially defined symbols as absolute. */
3208 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3209 || h == htab->elf.hgot
3210 || h == htab->elf.hplt)
3211 sym->st_shndx = SHN_ABS;
3216 /* Used to decide how to sort relocs in an optimal manner for the
3217 dynamic linker, before writing them out. */
3219 static enum elf_reloc_type_class
3220 elf_s390_reloc_type_class (rela)
3221 const Elf_Internal_Rela *rela;
3223 switch ((int) ELF64_R_TYPE (rela->r_info))
3225 case R_390_RELATIVE:
3226 return reloc_class_relative;
3227 case R_390_JMP_SLOT:
3228 return reloc_class_plt;
3230 return reloc_class_copy;
3232 return reloc_class_normal;
3236 /* Finish up the dynamic sections. */
3239 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3240 struct bfd_link_info *info)
3242 struct elf_s390_link_hash_table *htab;
3246 htab = elf_s390_hash_table (info);
3250 dynobj = htab->elf.dynobj;
3251 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3253 if (htab->elf.dynamic_sections_created)
3255 Elf64_External_Dyn *dyncon, *dynconend;
3257 if (sdyn == NULL || htab->sgot == NULL)
3260 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3261 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3262 for (; dyncon < dynconend; dyncon++)
3264 Elf_Internal_Dyn dyn;
3267 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3275 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3279 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3283 s = htab->srelplt->output_section;
3284 dyn.d_un.d_val = s->size;
3288 /* The procedure linkage table relocs (DT_JMPREL) should
3289 not be included in the overall relocs (DT_RELA).
3290 Therefore, we override the DT_RELASZ entry here to
3291 make it not include the JMPREL relocs. Since the
3292 linker script arranges for .rela.plt to follow all
3293 other relocation sections, we don't have to worry
3294 about changing the DT_RELA entry. */
3295 s = htab->srelplt->output_section;
3296 dyn.d_un.d_val -= s->size;
3300 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3303 /* Fill in the special first entry in the procedure linkage table. */
3304 if (htab->splt && htab->splt->size > 0)
3306 /* fill in blueprint for plt 0 entry */
3307 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3308 htab->splt->contents );
3309 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3310 htab->splt->contents +4 );
3311 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3312 htab->splt->contents +12 );
3313 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3314 htab->splt->contents +16 );
3315 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3316 htab->splt->contents +20 );
3317 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3318 htab->splt->contents + 24);
3319 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3320 htab->splt->contents + 28 );
3321 /* Fixup relative address to start of GOT */
3322 bfd_put_32 (output_bfd,
3323 (htab->sgotplt->output_section->vma +
3324 htab->sgotplt->output_offset
3325 - htab->splt->output_section->vma - 6)/2,
3326 htab->splt->contents + 8);
3328 elf_section_data (htab->splt->output_section)
3329 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3334 /* Fill in the first three entries in the global offset table. */
3335 if (htab->sgotplt->size > 0)
3337 bfd_put_64 (output_bfd,
3338 (sdyn == NULL ? (bfd_vma) 0
3339 : sdyn->output_section->vma + sdyn->output_offset),
3340 htab->sgotplt->contents);
3341 /* One entry for shared object struct ptr. */
3342 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3343 /* One entry for _dl_runtime_resolve. */
3344 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3347 elf_section_data (htab->sgot->output_section)
3348 ->this_hdr.sh_entsize = 8;
3353 /* Return address for Ith PLT stub in section PLT, for relocation REL
3354 or (bfd_vma) -1 if it should not be included. */
3357 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3358 const arelent *rel ATTRIBUTE_UNUSED)
3360 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3364 /* Why was the hash table entry size definition changed from
3365 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3366 this is the only reason for the s390_elf64_size_info structure. */
3368 const struct elf_size_info s390_elf64_size_info =
3370 sizeof (Elf64_External_Ehdr),
3371 sizeof (Elf64_External_Phdr),
3372 sizeof (Elf64_External_Shdr),
3373 sizeof (Elf64_External_Rel),
3374 sizeof (Elf64_External_Rela),
3375 sizeof (Elf64_External_Sym),
3376 sizeof (Elf64_External_Dyn),
3377 sizeof (Elf_External_Note),
3378 8, /* hash-table entry size. */
3379 1, /* internal relocations per external relocations. */
3380 64, /* arch_size. */
3381 3, /* log_file_align. */
3382 ELFCLASS64, EV_CURRENT,
3383 bfd_elf64_write_out_phdrs,
3384 bfd_elf64_write_shdrs_and_ehdr,
3385 bfd_elf64_checksum_contents,
3386 bfd_elf64_write_relocs,
3387 bfd_elf64_swap_symbol_in,
3388 bfd_elf64_swap_symbol_out,
3389 bfd_elf64_slurp_reloc_table,
3390 bfd_elf64_slurp_symbol_table,
3391 bfd_elf64_swap_dyn_in,
3392 bfd_elf64_swap_dyn_out,
3393 bfd_elf64_swap_reloc_in,
3394 bfd_elf64_swap_reloc_out,
3395 bfd_elf64_swap_reloca_in,
3396 bfd_elf64_swap_reloca_out
3399 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3400 #define TARGET_BIG_NAME "elf64-s390"
3401 #define ELF_ARCH bfd_arch_s390
3402 #define ELF_TARGET_ID S390_ELF_DATA
3403 #define ELF_MACHINE_CODE EM_S390
3404 #define ELF_MACHINE_ALT1 EM_S390_OLD
3405 #define ELF_MAXPAGESIZE 0x1000
3407 #define elf_backend_size_info s390_elf64_size_info
3409 #define elf_backend_can_gc_sections 1
3410 #define elf_backend_can_refcount 1
3411 #define elf_backend_want_got_plt 1
3412 #define elf_backend_plt_readonly 1
3413 #define elf_backend_want_plt_sym 0
3414 #define elf_backend_got_header_size 24
3415 #define elf_backend_rela_normal 1
3417 #define elf_info_to_howto elf_s390_info_to_howto
3419 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3420 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3421 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3422 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3424 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3425 #define elf_backend_check_relocs elf_s390_check_relocs
3426 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3427 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3428 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3429 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3430 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3431 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3432 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3433 #define elf_backend_relocate_section elf_s390_relocate_section
3434 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3435 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3436 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3437 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3439 #define bfd_elf64_mkobject elf_s390_mkobject
3440 #define elf_backend_object_p elf_s390_object_p
3442 #include "elf64-target.h"