1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Contributed by Carl B. Pedersen and Martin Schwidefsky.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 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 ((const struct elf_backend_data *, 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 static asection *elf_s390_gc_mark_hook
50 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
51 struct elf_link_hash_entry *, Elf_Internal_Sym *));
52 static bfd_boolean elf_s390_gc_sweep_hook
53 PARAMS ((bfd *, struct bfd_link_info *, asection *,
54 const Elf_Internal_Rela *));
55 struct elf_s390_link_hash_entry;
56 static void elf_s390_adjust_gotplt
57 PARAMS ((struct elf_s390_link_hash_entry *));
58 static bfd_boolean elf_s390_adjust_dynamic_symbol
59 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
60 static bfd_boolean allocate_dynrelocs
61 PARAMS ((struct elf_link_hash_entry *, PTR));
62 static bfd_boolean readonly_dynrelocs
63 PARAMS ((struct elf_link_hash_entry *, PTR));
64 static bfd_boolean elf_s390_size_dynamic_sections
65 PARAMS ((bfd *, struct bfd_link_info *));
66 static bfd_boolean elf_s390_relocate_section
67 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
68 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
69 static bfd_boolean elf_s390_finish_dynamic_symbol
70 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
72 static enum elf_reloc_type_class elf_s390_reloc_type_class
73 PARAMS ((const Elf_Internal_Rela *));
74 static bfd_boolean elf_s390_finish_dynamic_sections
75 PARAMS ((bfd *, struct bfd_link_info *));
76 static bfd_boolean elf_s390_mkobject
78 static bfd_boolean elf_s390_object_p
80 static bfd_boolean elf_s390_grok_prstatus
81 PARAMS ((bfd *, Elf_Internal_Note *));
82 static int elf_s390_tls_transition
83 PARAMS ((struct bfd_link_info *, int, int));
84 static bfd_reloc_status_type s390_tls_reloc
85 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
86 static bfd_vma dtpoff_base
87 PARAMS ((struct bfd_link_info *));
89 PARAMS ((struct bfd_link_info *, bfd_vma));
90 static void invalid_tls_insn
91 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
92 static bfd_reloc_status_type s390_elf_ldisp_reloc
93 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
97 /* The relocation "howto" table. */
99 static reloc_howto_type elf_howto_table[] =
101 HOWTO (R_390_NONE, /* type */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
105 FALSE, /* pc_relative */
107 complain_overflow_dont, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_390_NONE", /* name */
110 FALSE, /* partial_inplace */
113 FALSE), /* pcrel_offset */
115 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
117 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
118 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
119 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
121 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
123 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
125 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
127 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
131 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
133 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
135 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
137 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
139 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
141 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
143 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
145 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
147 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
149 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
151 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
153 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
155 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
157 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
158 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
159 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
160 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
161 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
163 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
165 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
166 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
167 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
168 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
170 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
172 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
173 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
175 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
177 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
179 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
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 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
187 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
188 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
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 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
192 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
193 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
194 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
196 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
197 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
199 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
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, 0xffffffff, TRUE),
202 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
203 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
204 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
205 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
206 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
207 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
208 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
210 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
212 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
213 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, 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 elf32_s390_vtinherit_howto =
226 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
227 static reloc_howto_type elf32_s390_vtentry_howto =
228 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
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];
283 case BFD_RELOC_390_GOTENT:
284 return &elf_howto_table[(int) R_390_GOTENT];
285 case BFD_RELOC_16_GOTOFF:
286 return &elf_howto_table[(int) R_390_GOTOFF16];
287 case BFD_RELOC_390_GOTPLT12:
288 return &elf_howto_table[(int) R_390_GOTPLT12];
289 case BFD_RELOC_390_GOTPLT16:
290 return &elf_howto_table[(int) R_390_GOTPLT16];
291 case BFD_RELOC_390_GOTPLT32:
292 return &elf_howto_table[(int) R_390_GOTPLT32];
293 case BFD_RELOC_390_GOTPLTENT:
294 return &elf_howto_table[(int) R_390_GOTPLTENT];
295 case BFD_RELOC_390_PLTOFF16:
296 return &elf_howto_table[(int) R_390_PLTOFF16];
297 case BFD_RELOC_390_PLTOFF32:
298 return &elf_howto_table[(int) R_390_PLTOFF32];
299 case BFD_RELOC_390_TLS_LOAD:
300 return &elf_howto_table[(int) R_390_TLS_LOAD];
301 case BFD_RELOC_390_TLS_GDCALL:
302 return &elf_howto_table[(int) R_390_TLS_GDCALL];
303 case BFD_RELOC_390_TLS_LDCALL:
304 return &elf_howto_table[(int) R_390_TLS_LDCALL];
305 case BFD_RELOC_390_TLS_GD32:
306 return &elf_howto_table[(int) R_390_TLS_GD32];
307 case BFD_RELOC_390_TLS_GOTIE12:
308 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
309 case BFD_RELOC_390_TLS_GOTIE32:
310 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
311 case BFD_RELOC_390_TLS_LDM32:
312 return &elf_howto_table[(int) R_390_TLS_LDM32];
313 case BFD_RELOC_390_TLS_IE32:
314 return &elf_howto_table[(int) R_390_TLS_IE32];
315 case BFD_RELOC_390_TLS_IEENT:
316 return &elf_howto_table[(int) R_390_TLS_IEENT];
317 case BFD_RELOC_390_TLS_LE32:
318 return &elf_howto_table[(int) R_390_TLS_LE32];
319 case BFD_RELOC_390_TLS_LDO32:
320 return &elf_howto_table[(int) R_390_TLS_LDO32];
321 case BFD_RELOC_390_TLS_DTPMOD:
322 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
323 case BFD_RELOC_390_TLS_DTPOFF:
324 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
325 case BFD_RELOC_390_TLS_TPOFF:
326 return &elf_howto_table[(int) R_390_TLS_TPOFF];
327 case BFD_RELOC_390_20:
328 return &elf_howto_table[(int) R_390_20];
329 case BFD_RELOC_390_GOT20:
330 return &elf_howto_table[(int) R_390_GOT20];
331 case BFD_RELOC_390_GOTPLT20:
332 return &elf_howto_table[(int) R_390_GOTPLT20];
333 case BFD_RELOC_390_TLS_GOTIE20:
334 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
335 case BFD_RELOC_VTABLE_INHERIT:
336 return &elf32_s390_vtinherit_howto;
337 case BFD_RELOC_VTABLE_ENTRY:
338 return &elf32_s390_vtentry_howto;
345 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
346 and elf32-s390.c has its own copy. */
349 elf_s390_info_to_howto (abfd, cache_ptr, dst)
350 bfd *abfd ATTRIBUTE_UNUSED;
352 Elf_Internal_Rela *dst;
354 switch (ELF32_R_TYPE(dst->r_info))
356 case R_390_GNU_VTINHERIT:
357 cache_ptr->howto = &elf32_s390_vtinherit_howto;
360 case R_390_GNU_VTENTRY:
361 cache_ptr->howto = &elf32_s390_vtentry_howto;
365 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
366 cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
370 /* A relocation function which doesn't do anything. */
371 static bfd_reloc_status_type
372 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
373 output_bfd, error_message)
374 bfd *abfd ATTRIBUTE_UNUSED;
375 arelent *reloc_entry;
376 asymbol *symbol ATTRIBUTE_UNUSED;
377 PTR data ATTRIBUTE_UNUSED;
378 asection *input_section;
380 char **error_message ATTRIBUTE_UNUSED;
383 reloc_entry->address += input_section->output_offset;
387 /* Handle the large displacement relocs. */
388 static bfd_reloc_status_type
389 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
390 output_bfd, error_message)
391 bfd *abfd ATTRIBUTE_UNUSED;
392 arelent *reloc_entry;
394 PTR data ATTRIBUTE_UNUSED;
395 asection *input_section;
397 char **error_message ATTRIBUTE_UNUSED;
399 reloc_howto_type *howto = reloc_entry->howto;
403 if (output_bfd != (bfd *) NULL
404 && (symbol->flags & BSF_SECTION_SYM) == 0
405 && (! howto->partial_inplace
406 || reloc_entry->addend == 0))
408 reloc_entry->address += input_section->output_offset;
412 if (output_bfd != NULL)
413 return bfd_reloc_continue;
415 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
416 return bfd_reloc_outofrange;
418 relocation = (symbol->value
419 + symbol->section->output_section->vma
420 + symbol->section->output_offset);
421 relocation += reloc_entry->addend;
422 if (howto->pc_relative)
424 relocation -= (input_section->output_section->vma
425 + input_section->output_offset);
426 relocation -= reloc_entry->address;
429 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
430 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
431 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
433 if ((bfd_signed_vma) relocation < - 0x80000
434 || (bfd_signed_vma) relocation > 0x7ffff)
435 return bfd_reloc_overflow;
441 elf_s390_is_local_label_name (abfd, name)
445 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
448 return _bfd_elf_is_local_label_name (abfd, name);
451 /* Functions for the 390 ELF linker. */
453 /* The name of the dynamic interpreter. This is put in the .interp
456 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
458 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
459 copying dynamic variables from a shared lib into an app's dynbss
460 section, and instead use a dynamic relocation to point into the
462 #define ELIMINATE_COPY_RELOCS 1
464 /* The size in bytes of the first entry in the procedure linkage table. */
465 #define PLT_FIRST_ENTRY_SIZE 32
466 /* The size in bytes of an entry in the procedure linkage table. */
467 #define PLT_ENTRY_SIZE 32
469 #define GOT_ENTRY_SIZE 4
471 /* The first three entries in a procedure linkage table are reserved,
472 and the initial contents are unimportant (we zero them out).
473 Subsequent entries look like this. See the SVR4 ABI 386
474 supplement to see how this works. */
476 /* For the s390, simple addr offset can only be 0 - 4096.
477 To use the full 2 GB address space, several instructions
478 are needed to load an address in a register and execute
479 a branch( or just saving the address)
481 Furthermore, only r 0 and 1 are free to use!!! */
483 /* The first 3 words in the GOT are then reserved.
484 Word 0 is the address of the dynamic table.
485 Word 1 is a pointer to a structure describing the object
486 Word 2 is used to point to the loader entry address.
488 The code for position independent PLT entries looks like this:
490 r12 holds addr of the current GOT at entry to the PLT
492 The GOT holds the address in the PLT to be executed.
493 The loader then gets:
494 24(15) = Pointer to the structure describing the object.
495 28(15) = Offset in symbol table
497 The loader must then find the module where the function is
498 and insert the address in the GOT.
500 Note: 390 can only address +- 64 K relative.
501 We check if offset > 65536, then make a relative branch -64xxx
502 back to a previous defined branch
504 PLT1: BASR 1,0 # 2 bytes
505 L 1,22(1) # 4 bytes Load offset in GOT in r 1
506 L 1,(1,12) # 4 bytes Load address from GOT in r1
507 BCR 15,1 # 2 bytes Jump to address
508 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
509 L 1,14(1) # 4 bytes Load offset in symol table in r1
510 BRC 15,-x # 4 bytes Jump to start of PLT
511 .word 0 # 2 bytes filler
512 .long ? # 4 bytes offset in GOT
513 .long ? # 4 bytes offset into symbol table
515 This was the general case. There are two additional, optimizes PLT
516 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
517 First the one for GOT offsets < 4096:
519 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
520 BCR 15,1 # 2 bytes Jump to address
521 .word 0,0,0 # 6 bytes filler
522 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
523 L 1,14(1) # 4 bytes Load offset in symbol table in r1
524 BRC 15,-x # 4 bytes Jump to start of PLT
525 .word 0,0,0 # 6 bytes filler
526 .long ? # 4 bytes offset into symbol table
528 Second the one for GOT offsets < 32768:
530 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
531 L 1,(1,12) # 4 bytes Load address from GOT to r1
532 BCR 15,1 # 2 bytes Jump to address
533 .word 0 # 2 bytes filler
534 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
535 L 1,14(1) # 4 bytes Load offset in symbol table in r1
536 BRC 15,-x # 4 bytes Jump to start of PLT
537 .word 0,0,0 # 6 bytes filler
538 .long ? # 4 bytes offset into symbol table
540 Total = 32 bytes per PLT entry
542 The code for static build PLT entries looks like this:
544 PLT1: BASR 1,0 # 2 bytes
545 L 1,22(1) # 4 bytes Load address of GOT entry
546 L 1,0(0,1) # 4 bytes Load address from GOT in r1
547 BCR 15,1 # 2 bytes Jump to address
548 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
549 L 1,14(1) # 4 bytes Load offset in symbol table in r1
550 BRC 15,-x # 4 bytes Jump to start of PLT
551 .word 0 # 2 bytes filler
552 .long ? # 4 bytes address of GOT entry
553 .long ? # 4 bytes offset into symbol table */
555 #define PLT_PIC_ENTRY_WORD0 0x0d105810
556 #define PLT_PIC_ENTRY_WORD1 0x10165811
557 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
558 #define PLT_PIC_ENTRY_WORD3 0x0d105810
559 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
561 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
562 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
563 #define PLT_PIC12_ENTRY_WORD2 0x00000000
564 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
565 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
567 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
568 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
569 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
570 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
571 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
573 #define PLT_ENTRY_WORD0 0x0d105810
574 #define PLT_ENTRY_WORD1 0x10165810
575 #define PLT_ENTRY_WORD2 0x100007f1
576 #define PLT_ENTRY_WORD3 0x0d105810
577 #define PLT_ENTRY_WORD4 0x100ea7f4
579 /* The first PLT entry pushes the offset into the symbol table
580 from R1 onto the stack at 8(15) and the loader object info
581 at 12(15), loads the loader address in R1 and jumps to it. */
583 /* The first entry in the PLT for PIC code:
586 ST 1,28(15) # R1 has offset into symbol table
587 L 1,4(12) # Get loader ino(object struct address)
588 ST 1,24(15) # Store address
589 L 1,8(12) # Entry address of loader in R1
590 BR 1 # Jump to loader
592 The first entry in the PLT for static code:
595 ST 1,28(15) # R1 has offset into symbol table
597 L 1,18(0,1) # Get address of GOT
598 MVC 24(4,15),4(1) # Move loader ino to stack
599 L 1,8(1) # Get address of loader
600 BR 1 # Jump to loader
602 .long got # address of GOT */
604 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
605 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
606 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
607 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
608 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
610 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
611 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
612 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
613 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
614 #define PLT_FIRST_ENTRY_WORD4 0x58101008
615 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
617 /* The s390 linker needs to keep track of the number of relocs that it
618 decides to copy as dynamic relocs in check_relocs for each symbol.
619 This is so that it can later discard them if they are found to be
620 unnecessary. We store the information in a field extending the
621 regular ELF linker hash table. */
623 struct elf_s390_dyn_relocs
625 struct elf_s390_dyn_relocs *next;
627 /* The input section of the reloc. */
630 /* Total number of relocs copied for the input section. */
633 /* Number of pc-relative relocs copied for the input section. */
634 bfd_size_type pc_count;
637 /* s390 ELF linker hash entry. */
639 struct elf_s390_link_hash_entry
641 struct elf_link_hash_entry elf;
643 /* Track dynamic relocs copied for this symbol. */
644 struct elf_s390_dyn_relocs *dyn_relocs;
646 /* Number of GOTPLT references for a function. */
647 bfd_signed_vma gotplt_refcount;
649 #define GOT_UNKNOWN 0
653 #define GOT_TLS_IE_NLT 4
654 unsigned char tls_type;
657 #define elf_s390_hash_entry(ent) \
658 ((struct elf_s390_link_hash_entry *)(ent))
660 struct elf_s390_obj_tdata
662 struct elf_obj_tdata root;
664 /* tls_type for each local got entry. */
665 char *local_got_tls_type;
668 #define elf_s390_tdata(abfd) \
669 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
671 #define elf_s390_local_got_tls_type(abfd) \
672 (elf_s390_tdata (abfd)->local_got_tls_type)
675 elf_s390_mkobject (abfd)
678 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
679 abfd->tdata.any = bfd_zalloc (abfd, amt);
680 if (abfd->tdata.any == NULL)
686 elf_s390_object_p (abfd)
689 /* Set the right machine number for an s390 elf32 file. */
690 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
693 /* s390 ELF linker hash table. */
695 struct elf_s390_link_hash_table
697 struct elf_link_hash_table elf;
699 /* Short-cuts to get to dynamic linker sections. */
709 bfd_signed_vma refcount;
713 /* Small local sym to section mapping cache. */
714 struct sym_sec_cache sym_sec;
717 /* Get the s390 ELF linker hash table from a link_info structure. */
719 #define elf_s390_hash_table(p) \
720 ((struct elf_s390_link_hash_table *) ((p)->hash))
722 /* Create an entry in an s390 ELF linker hash table. */
724 static struct bfd_hash_entry *
725 link_hash_newfunc (entry, table, string)
726 struct bfd_hash_entry *entry;
727 struct bfd_hash_table *table;
730 /* Allocate the structure if it has not already been allocated by a
734 entry = bfd_hash_allocate (table,
735 sizeof (struct elf_s390_link_hash_entry));
740 /* Call the allocation method of the superclass. */
741 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
744 struct elf_s390_link_hash_entry *eh;
746 eh = (struct elf_s390_link_hash_entry *) entry;
747 eh->dyn_relocs = NULL;
748 eh->gotplt_refcount = 0;
749 eh->tls_type = GOT_UNKNOWN;
755 /* Create an s390 ELF linker hash table. */
757 static struct bfd_link_hash_table *
758 elf_s390_link_hash_table_create (abfd)
761 struct elf_s390_link_hash_table *ret;
762 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
764 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
768 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
781 ret->tls_ldm_got.refcount = 0;
782 ret->sym_sec.abfd = NULL;
784 return &ret->elf.root;
787 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
788 shortcuts to them in our hash table. */
791 create_got_section (dynobj, info)
793 struct bfd_link_info *info;
795 struct elf_s390_link_hash_table *htab;
797 if (! _bfd_elf_create_got_section (dynobj, info))
800 htab = elf_s390_hash_table (info);
801 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
802 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
803 if (!htab->sgot || !htab->sgotplt)
806 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
807 (SEC_ALLOC | SEC_LOAD
812 if (htab->srelgot == NULL
813 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
818 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
819 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
823 elf_s390_create_dynamic_sections (dynobj, info)
825 struct bfd_link_info *info;
827 struct elf_s390_link_hash_table *htab;
829 htab = elf_s390_hash_table (info);
830 if (!htab->sgot && !create_got_section (dynobj, info))
833 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
836 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
837 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
838 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
840 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
842 if (!htab->splt || !htab->srelplt || !htab->sdynbss
843 || (!info->shared && !htab->srelbss))
849 /* Copy the extra info we tack onto an elf_link_hash_entry. */
852 elf_s390_copy_indirect_symbol (bed, dir, ind)
853 const struct elf_backend_data *bed;
854 struct elf_link_hash_entry *dir, *ind;
856 struct elf_s390_link_hash_entry *edir, *eind;
858 edir = (struct elf_s390_link_hash_entry *) dir;
859 eind = (struct elf_s390_link_hash_entry *) ind;
861 if (eind->dyn_relocs != NULL)
863 if (edir->dyn_relocs != NULL)
865 struct elf_s390_dyn_relocs **pp;
866 struct elf_s390_dyn_relocs *p;
868 if (ind->root.type == bfd_link_hash_indirect)
871 /* Add reloc counts against the weak sym to the strong sym
872 list. Merge any entries against the same section. */
873 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
875 struct elf_s390_dyn_relocs *q;
877 for (q = edir->dyn_relocs; q != NULL; q = q->next)
878 if (q->sec == p->sec)
880 q->pc_count += p->pc_count;
881 q->count += p->count;
888 *pp = edir->dyn_relocs;
891 edir->dyn_relocs = eind->dyn_relocs;
892 eind->dyn_relocs = NULL;
895 if (ind->root.type == bfd_link_hash_indirect
896 && dir->got.refcount <= 0)
898 edir->tls_type = eind->tls_type;
899 eind->tls_type = GOT_UNKNOWN;
902 if (ELIMINATE_COPY_RELOCS
903 && ind->root.type != bfd_link_hash_indirect
904 && dir->dynamic_adjusted)
906 /* If called to transfer flags for a weakdef during processing
907 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
908 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
909 dir->ref_dynamic |= ind->ref_dynamic;
910 dir->ref_regular |= ind->ref_regular;
911 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
912 dir->needs_plt |= ind->needs_plt;
915 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
919 elf_s390_tls_transition (info, r_type, is_local)
920 struct bfd_link_info *info;
932 return R_390_TLS_LE32;
933 return R_390_TLS_IE32;
934 case R_390_TLS_GOTIE32:
936 return R_390_TLS_LE32;
937 return R_390_TLS_GOTIE32;
938 case R_390_TLS_LDM32:
939 return R_390_TLS_LE32;
945 /* Look through the relocs for a section during the first phase, and
946 allocate space in the global offset table or procedure linkage
950 elf_s390_check_relocs (abfd, info, sec, relocs)
952 struct bfd_link_info *info;
954 const Elf_Internal_Rela *relocs;
956 struct elf_s390_link_hash_table *htab;
957 Elf_Internal_Shdr *symtab_hdr;
958 struct elf_link_hash_entry **sym_hashes;
959 const Elf_Internal_Rela *rel;
960 const Elf_Internal_Rela *rel_end;
962 bfd_signed_vma *local_got_refcounts;
963 int tls_type, old_tls_type;
965 if (info->relocatable)
968 htab = elf_s390_hash_table (info);
969 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
970 sym_hashes = elf_sym_hashes (abfd);
971 local_got_refcounts = elf_local_got_refcounts (abfd);
975 rel_end = relocs + sec->reloc_count;
976 for (rel = relocs; rel < rel_end; rel++)
979 unsigned long r_symndx;
980 struct elf_link_hash_entry *h;
982 r_symndx = ELF32_R_SYM (rel->r_info);
984 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
986 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
991 if (r_symndx < symtab_hdr->sh_info)
994 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
996 /* Create got section and local_got_refcounts array if they
998 r_type = elf_s390_tls_transition (info,
999 ELF32_R_TYPE (rel->r_info),
1008 case R_390_GOTPLT12:
1009 case R_390_GOTPLT16:
1010 case R_390_GOTPLT20:
1011 case R_390_GOTPLT32:
1012 case R_390_GOTPLTENT:
1013 case R_390_TLS_GD32:
1014 case R_390_TLS_GOTIE12:
1015 case R_390_TLS_GOTIE20:
1016 case R_390_TLS_GOTIE32:
1017 case R_390_TLS_IEENT:
1018 case R_390_TLS_IE32:
1019 case R_390_TLS_LDM32:
1021 && local_got_refcounts == NULL)
1025 size = symtab_hdr->sh_info;
1026 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1027 local_got_refcounts = ((bfd_signed_vma *)
1028 bfd_zalloc (abfd, size));
1029 if (local_got_refcounts == NULL)
1031 elf_local_got_refcounts (abfd) = local_got_refcounts;
1032 elf_s390_local_got_tls_type (abfd)
1033 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1036 case R_390_GOTOFF16:
1037 case R_390_GOTOFF32:
1039 case R_390_GOTPCDBL:
1040 if (htab->sgot == NULL)
1042 if (htab->elf.dynobj == NULL)
1043 htab->elf.dynobj = abfd;
1044 if (!create_got_section (htab->elf.dynobj, info))
1051 case R_390_GOTOFF16:
1052 case R_390_GOTOFF32:
1054 case R_390_GOTPCDBL:
1055 /* Got is created, nothing to be done. */
1058 case R_390_PLT16DBL:
1059 case R_390_PLT32DBL:
1061 case R_390_PLTOFF16:
1062 case R_390_PLTOFF32:
1063 /* This symbol requires a procedure linkage table entry. We
1064 actually build the entry in adjust_dynamic_symbol,
1065 because this might be a case of linking PIC code which is
1066 never referenced by a dynamic object, in which case we
1067 don't need to generate a procedure linkage table entry
1070 /* If this is a local symbol, we resolve it directly without
1071 creating a procedure linkage table entry. */
1075 h->plt.refcount += 1;
1079 case R_390_GOTPLT12:
1080 case R_390_GOTPLT16:
1081 case R_390_GOTPLT20:
1082 case R_390_GOTPLT32:
1083 case R_390_GOTPLTENT:
1084 /* This symbol requires either a procedure linkage table entry
1085 or an entry in the local got. We actually build the entry
1086 in adjust_dynamic_symbol because whether this is really a
1087 global reference can change and with it the fact if we have
1088 to create a plt entry or a local got entry. To be able to
1089 make a once global symbol a local one we have to keep track
1090 of the number of gotplt references that exist for this
1094 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1096 h->plt.refcount += 1;
1099 local_got_refcounts[r_symndx] += 1;
1102 case R_390_TLS_LDM32:
1103 htab->tls_ldm_got.refcount += 1;
1106 case R_390_TLS_IE32:
1107 case R_390_TLS_GOTIE12:
1108 case R_390_TLS_GOTIE20:
1109 case R_390_TLS_GOTIE32:
1110 case R_390_TLS_IEENT:
1112 info->flags |= DF_STATIC_TLS;
1120 case R_390_TLS_GD32:
1121 /* This symbol requires a global offset table entry. */
1130 tls_type = GOT_NORMAL;
1132 case R_390_TLS_GD32:
1133 tls_type = GOT_TLS_GD;
1135 case R_390_TLS_IE32:
1136 case R_390_TLS_GOTIE32:
1137 tls_type = GOT_TLS_IE;
1139 case R_390_TLS_GOTIE12:
1140 case R_390_TLS_GOTIE20:
1141 case R_390_TLS_IEENT:
1142 tls_type = GOT_TLS_IE_NLT;
1148 h->got.refcount += 1;
1149 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1153 local_got_refcounts[r_symndx] += 1;
1154 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1156 /* If a TLS symbol is accessed using IE at least once,
1157 there is no point to use dynamic model for it. */
1158 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1160 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1162 (*_bfd_error_handler)
1163 (_("%B: `%s' accessed both as normal and thread local symbol"),
1164 abfd, h->root.root.string);
1167 if (old_tls_type > tls_type)
1168 tls_type = old_tls_type;
1171 if (old_tls_type != tls_type)
1174 elf_s390_hash_entry (h)->tls_type = tls_type;
1176 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1179 if (r_type != R_390_TLS_IE32)
1183 case R_390_TLS_LE32:
1186 info->flags |= DF_STATIC_TLS;
1196 if (h != NULL && !info->shared)
1198 /* If this reloc is in a read-only section, we might
1199 need a copy reloc. We can't check reliably at this
1200 stage whether the section is read-only, as input
1201 sections have not yet been mapped to output sections.
1202 Tentatively set the flag for now, and correct in
1203 adjust_dynamic_symbol. */
1206 /* We may need a .plt entry if the function this reloc
1207 refers to is in a shared lib. */
1208 h->plt.refcount += 1;
1211 /* If we are creating a shared library, and this is a reloc
1212 against a global symbol, or a non PC relative reloc
1213 against a local symbol, then we need to copy the reloc
1214 into the shared library. However, if we are linking with
1215 -Bsymbolic, we do not need to copy a reloc against a
1216 global symbol which is defined in an object we are
1217 including in the link (i.e., DEF_REGULAR is set). At
1218 this point we have not seen all the input files, so it is
1219 possible that DEF_REGULAR is not set now but will be set
1220 later (it is never cleared). In case of a weak definition,
1221 DEF_REGULAR may be cleared later by a strong definition in
1222 a shared library. We account for that possibility below by
1223 storing information in the relocs_copied field of the hash
1224 table entry. A similar situation occurs when creating
1225 shared libraries and symbol visibility changes render the
1228 If on the other hand, we are creating an executable, we
1229 may need to keep relocations for symbols satisfied by a
1230 dynamic library if we manage to avoid copy relocs for the
1233 && (sec->flags & SEC_ALLOC) != 0
1234 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1235 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1236 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1237 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1239 && (! info->symbolic
1240 || h->root.type == bfd_link_hash_defweak
1241 || !h->def_regular))))
1242 || (ELIMINATE_COPY_RELOCS
1244 && (sec->flags & SEC_ALLOC) != 0
1246 && (h->root.type == bfd_link_hash_defweak
1247 || !h->def_regular)))
1249 struct elf_s390_dyn_relocs *p;
1250 struct elf_s390_dyn_relocs **head;
1252 /* We must copy these reloc types into the output file.
1253 Create a reloc section in dynobj and make room for
1260 name = (bfd_elf_string_from_elf_section
1262 elf_elfheader (abfd)->e_shstrndx,
1263 elf_section_data (sec)->rel_hdr.sh_name));
1267 if (strncmp (name, ".rela", 5) != 0
1268 || strcmp (bfd_get_section_name (abfd, sec),
1271 (*_bfd_error_handler)
1272 (_("%B: bad relocation section name `%s\'"),
1276 if (htab->elf.dynobj == NULL)
1277 htab->elf.dynobj = abfd;
1279 dynobj = htab->elf.dynobj;
1280 sreloc = bfd_get_section_by_name (dynobj, name);
1285 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1286 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1287 if ((sec->flags & SEC_ALLOC) != 0)
1288 flags |= SEC_ALLOC | SEC_LOAD;
1289 sreloc = bfd_make_section_with_flags (dynobj,
1293 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1296 elf_section_data (sec)->sreloc = sreloc;
1299 /* If this is a global symbol, we count the number of
1300 relocations we need for this symbol. */
1303 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1307 /* Track dynamic relocs needed for local syms too.
1308 We really need local syms available to do this
1312 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1317 head = ((struct elf_s390_dyn_relocs **)
1318 &elf_section_data (s)->local_dynrel);
1322 if (p == NULL || p->sec != sec)
1324 bfd_size_type amt = sizeof *p;
1326 p = ((struct elf_s390_dyn_relocs *)
1327 bfd_alloc (htab->elf.dynobj, amt));
1338 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1339 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1340 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1341 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1346 /* This relocation describes the C++ object vtable hierarchy.
1347 Reconstruct it for later use during GC. */
1348 case R_390_GNU_VTINHERIT:
1349 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1353 /* This relocation describes which C++ vtable entries are actually
1354 used. Record for later use during GC. */
1355 case R_390_GNU_VTENTRY:
1356 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1368 /* Return the section that should be marked against GC for a given
1372 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1374 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1375 Elf_Internal_Rela *rel;
1376 struct elf_link_hash_entry *h;
1377 Elf_Internal_Sym *sym;
1381 switch (ELF32_R_TYPE (rel->r_info))
1383 case R_390_GNU_VTINHERIT:
1384 case R_390_GNU_VTENTRY:
1388 switch (h->root.type)
1390 case bfd_link_hash_defined:
1391 case bfd_link_hash_defweak:
1392 return h->root.u.def.section;
1394 case bfd_link_hash_common:
1395 return h->root.u.c.p->section;
1403 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1408 /* Update the got entry reference counts for the section being removed. */
1411 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1413 struct bfd_link_info *info;
1415 const Elf_Internal_Rela *relocs;
1417 Elf_Internal_Shdr *symtab_hdr;
1418 struct elf_link_hash_entry **sym_hashes;
1419 bfd_signed_vma *local_got_refcounts;
1420 const Elf_Internal_Rela *rel, *relend;
1422 elf_section_data (sec)->local_dynrel = NULL;
1424 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1425 sym_hashes = elf_sym_hashes (abfd);
1426 local_got_refcounts = elf_local_got_refcounts (abfd);
1428 relend = relocs + sec->reloc_count;
1429 for (rel = relocs; rel < relend; rel++)
1431 unsigned long r_symndx;
1432 unsigned int r_type;
1433 struct elf_link_hash_entry *h = NULL;
1435 r_symndx = ELF32_R_SYM (rel->r_info);
1436 if (r_symndx >= symtab_hdr->sh_info)
1438 struct elf_s390_link_hash_entry *eh;
1439 struct elf_s390_dyn_relocs **pp;
1440 struct elf_s390_dyn_relocs *p;
1442 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1443 while (h->root.type == bfd_link_hash_indirect
1444 || h->root.type == bfd_link_hash_warning)
1445 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1446 eh = (struct elf_s390_link_hash_entry *) h;
1448 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1451 /* Everything must go for SEC. */
1457 r_type = ELF32_R_TYPE (rel->r_info);
1458 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1461 case R_390_TLS_LDM32:
1462 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1463 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1466 case R_390_TLS_GD32:
1467 case R_390_TLS_IE32:
1468 case R_390_TLS_GOTIE12:
1469 case R_390_TLS_GOTIE20:
1470 case R_390_TLS_GOTIE32:
1471 case R_390_TLS_IEENT:
1476 case R_390_GOTOFF16:
1477 case R_390_GOTOFF32:
1479 case R_390_GOTPCDBL:
1483 if (h->got.refcount > 0)
1484 h->got.refcount -= 1;
1486 else if (local_got_refcounts != NULL)
1488 if (local_got_refcounts[r_symndx] > 0)
1489 local_got_refcounts[r_symndx] -= 1;
1506 case R_390_PLT16DBL:
1507 case R_390_PLT32DBL:
1509 case R_390_PLTOFF16:
1510 case R_390_PLTOFF32:
1513 if (h->plt.refcount > 0)
1514 h->plt.refcount -= 1;
1518 case R_390_GOTPLT12:
1519 case R_390_GOTPLT16:
1520 case R_390_GOTPLT20:
1521 case R_390_GOTPLT32:
1522 case R_390_GOTPLTENT:
1525 if (h->plt.refcount > 0)
1527 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1528 h->plt.refcount -= 1;
1531 else if (local_got_refcounts != NULL)
1533 if (local_got_refcounts[r_symndx] > 0)
1534 local_got_refcounts[r_symndx] -= 1;
1546 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1547 entry but we found we will not create any. Called when we find we will
1548 not have any PLT for this symbol, by for example
1549 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1550 or elf_s390_size_dynamic_sections if no dynamic sections will be
1551 created (we're only linking static objects). */
1554 elf_s390_adjust_gotplt (h)
1555 struct elf_s390_link_hash_entry *h;
1557 if (h->elf.root.type == bfd_link_hash_warning)
1558 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1560 if (h->gotplt_refcount <= 0)
1563 /* We simply add the number of gotplt references to the number
1564 * of got references for this symbol. */
1565 h->elf.got.refcount += h->gotplt_refcount;
1566 h->gotplt_refcount = -1;
1569 /* Adjust a symbol defined by a dynamic object and referenced by a
1570 regular object. The current definition is in some section of the
1571 dynamic object, but we're not including those sections. We have to
1572 change the definition to something the rest of the link can
1576 elf_s390_adjust_dynamic_symbol (info, h)
1577 struct bfd_link_info *info;
1578 struct elf_link_hash_entry *h;
1580 struct elf_s390_link_hash_table *htab;
1582 unsigned int power_of_two;
1584 /* If this is a function, put it in the procedure linkage table. We
1585 will fill in the contents of the procedure linkage table later
1586 (although we could actually do it here). */
1587 if (h->type == STT_FUNC
1590 if (h->plt.refcount <= 0
1594 && h->root.type != bfd_link_hash_undefweak
1595 && h->root.type != bfd_link_hash_undefined))
1597 /* This case can occur if we saw a PLT32 reloc in an input
1598 file, but the symbol was never referred to by a dynamic
1599 object, or if all references were garbage collected. In
1600 such a case, we don't actually need to build a procedure
1601 linkage table, and we can just do a PC32 reloc instead. */
1602 h->plt.offset = (bfd_vma) -1;
1604 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1610 /* It's possible that we incorrectly decided a .plt reloc was
1611 needed for an R_390_PC32 reloc to a non-function sym in
1612 check_relocs. We can't decide accurately between function and
1613 non-function syms in check-relocs; Objects loaded later in
1614 the link may change h->type. So fix it now. */
1615 h->plt.offset = (bfd_vma) -1;
1617 /* If this is a weak symbol, and there is a real definition, the
1618 processor independent code will have arranged for us to see the
1619 real definition first, and we can just use the same value. */
1620 if (h->u.weakdef != NULL)
1622 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1623 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1624 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1625 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1626 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1627 h->non_got_ref = h->u.weakdef->non_got_ref;
1631 /* This is a reference to a symbol defined by a dynamic object which
1632 is not a function. */
1634 /* If we are creating a shared library, we must presume that the
1635 only references to the symbol are via the global offset table.
1636 For such cases we need not do anything here; the relocations will
1637 be handled correctly by relocate_section. */
1641 /* If there are no references to this symbol that do not use the
1642 GOT, we don't need to generate a copy reloc. */
1643 if (!h->non_got_ref)
1646 /* If -z nocopyreloc was given, we won't generate them either. */
1647 if (info->nocopyreloc)
1653 if (ELIMINATE_COPY_RELOCS)
1655 struct elf_s390_link_hash_entry * eh;
1656 struct elf_s390_dyn_relocs *p;
1658 eh = (struct elf_s390_link_hash_entry *) h;
1659 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1661 s = p->sec->output_section;
1662 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1666 /* If we didn't find any dynamic relocs in read-only sections, then
1667 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1675 /* We must allocate the symbol in our .dynbss section, which will
1676 become part of the .bss section of the executable. There will be
1677 an entry for this symbol in the .dynsym section. The dynamic
1678 object will contain position independent code, so all references
1679 from the dynamic object to this symbol will go through the global
1680 offset table. The dynamic linker will use the .dynsym entry to
1681 determine the address it must put in the global offset table, so
1682 both the dynamic object and the regular object will refer to the
1683 same memory location for the variable. */
1685 htab = elf_s390_hash_table (info);
1687 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1688 copy the initial value out of the dynamic object and into the
1689 runtime process image. */
1690 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1692 htab->srelbss->size += sizeof (Elf32_External_Rela);
1696 /* We need to figure out the alignment required for this symbol. I
1697 have no idea how ELF linkers handle this. */
1698 power_of_two = bfd_log2 (h->size);
1699 if (power_of_two > 3)
1702 /* Apply the required alignment. */
1704 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1705 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1707 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1711 /* Define the symbol as being at this point in the section. */
1712 h->root.u.def.section = s;
1713 h->root.u.def.value = s->size;
1715 /* Increment the section size to make room for the symbol. */
1721 /* Allocate space in .plt, .got and associated reloc sections for
1725 allocate_dynrelocs (h, inf)
1726 struct elf_link_hash_entry *h;
1729 struct bfd_link_info *info;
1730 struct elf_s390_link_hash_table *htab;
1731 struct elf_s390_link_hash_entry *eh;
1732 struct elf_s390_dyn_relocs *p;
1734 if (h->root.type == bfd_link_hash_indirect)
1737 if (h->root.type == bfd_link_hash_warning)
1738 /* When warning symbols are created, they **replace** the "real"
1739 entry in the hash table, thus we never get to see the real
1740 symbol in a hash traversal. So look at it now. */
1741 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1743 info = (struct bfd_link_info *) inf;
1744 htab = elf_s390_hash_table (info);
1746 if (htab->elf.dynamic_sections_created
1747 && h->plt.refcount > 0
1748 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1749 || h->root.type != bfd_link_hash_undefweak))
1751 /* Make sure this symbol is output as a dynamic symbol.
1752 Undefined weak syms won't yet be marked as dynamic. */
1753 if (h->dynindx == -1
1754 && !h->forced_local)
1756 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1761 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1763 asection *s = htab->splt;
1765 /* If this is the first .plt entry, make room for the special
1768 s->size += PLT_FIRST_ENTRY_SIZE;
1770 h->plt.offset = s->size;
1772 /* If this symbol is not defined in a regular file, and we are
1773 not generating a shared library, then set the symbol to this
1774 location in the .plt. This is required to make function
1775 pointers compare as equal between the normal executable and
1776 the shared library. */
1780 h->root.u.def.section = s;
1781 h->root.u.def.value = h->plt.offset;
1784 /* Make room for this entry. */
1785 s->size += PLT_ENTRY_SIZE;
1787 /* We also need to make an entry in the .got.plt section, which
1788 will be placed in the .got section by the linker script. */
1789 htab->sgotplt->size += GOT_ENTRY_SIZE;
1791 /* We also need to make an entry in the .rela.plt section. */
1792 htab->srelplt->size += sizeof (Elf32_External_Rela);
1796 h->plt.offset = (bfd_vma) -1;
1798 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1803 h->plt.offset = (bfd_vma) -1;
1805 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1808 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1809 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1810 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1811 we can save the dynamic TLS relocation. */
1812 if (h->got.refcount > 0
1815 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1817 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1818 /* For the GOTIE access without a literal pool entry the offset has
1819 to be stored somewhere. The immediate value in the instruction
1820 is not bit enough so the value is stored in the got. */
1822 h->got.offset = htab->sgot->size;
1823 htab->sgot->size += GOT_ENTRY_SIZE;
1826 h->got.offset = (bfd_vma) -1;
1828 else if (h->got.refcount > 0)
1832 int tls_type = elf_s390_hash_entry(h)->tls_type;
1834 /* Make sure this symbol is output as a dynamic symbol.
1835 Undefined weak syms won't yet be marked as dynamic. */
1836 if (h->dynindx == -1
1837 && !h->forced_local)
1839 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1844 h->got.offset = s->size;
1845 s->size += GOT_ENTRY_SIZE;
1846 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1847 if (tls_type == GOT_TLS_GD)
1848 s->size += GOT_ENTRY_SIZE;
1849 dyn = htab->elf.dynamic_sections_created;
1850 /* R_390_TLS_IE32 needs one dynamic relocation,
1851 R_390_TLS_GD32 needs one if local symbol and two if global. */
1852 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1853 || tls_type >= GOT_TLS_IE)
1854 htab->srelgot->size += sizeof (Elf32_External_Rela);
1855 else if (tls_type == GOT_TLS_GD)
1856 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1857 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1858 || h->root.type != bfd_link_hash_undefweak)
1860 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1861 htab->srelgot->size += sizeof (Elf32_External_Rela);
1864 h->got.offset = (bfd_vma) -1;
1866 eh = (struct elf_s390_link_hash_entry *) h;
1867 if (eh->dyn_relocs == NULL)
1870 /* In the shared -Bsymbolic case, discard space allocated for
1871 dynamic pc-relative relocs against symbols which turn out to be
1872 defined in regular objects. For the normal shared case, discard
1873 space for pc-relative relocs that have become local due to symbol
1874 visibility changes. */
1878 if (SYMBOL_REFERENCES_LOCAL (info, h))
1880 struct elf_s390_dyn_relocs **pp;
1882 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1884 p->count -= p->pc_count;
1893 /* Also discard relocs on undefined weak syms with non-default
1895 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1896 && h->root.type == bfd_link_hash_undefweak)
1897 eh->dyn_relocs = NULL;
1899 else if (ELIMINATE_COPY_RELOCS)
1901 /* For the non-shared case, discard space for relocs against
1902 symbols which turn out to need copy relocs or are not
1908 || (htab->elf.dynamic_sections_created
1909 && (h->root.type == bfd_link_hash_undefweak
1910 || h->root.type == bfd_link_hash_undefined))))
1912 /* Make sure this symbol is output as a dynamic symbol.
1913 Undefined weak syms won't yet be marked as dynamic. */
1914 if (h->dynindx == -1
1915 && !h->forced_local)
1917 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1921 /* If that succeeded, we know we'll be keeping all the
1923 if (h->dynindx != -1)
1927 eh->dyn_relocs = NULL;
1932 /* Finally, allocate space. */
1933 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1935 asection *sreloc = elf_section_data (p->sec)->sreloc;
1937 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1943 /* Find any dynamic relocs that apply to read-only sections. */
1946 readonly_dynrelocs (h, inf)
1947 struct elf_link_hash_entry *h;
1950 struct elf_s390_link_hash_entry *eh;
1951 struct elf_s390_dyn_relocs *p;
1953 if (h->root.type == bfd_link_hash_warning)
1954 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1956 eh = (struct elf_s390_link_hash_entry *) h;
1957 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1959 asection *s = p->sec->output_section;
1961 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1963 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1965 info->flags |= DF_TEXTREL;
1967 /* Not an error, just cut short the traversal. */
1974 /* Set the sizes of the dynamic sections. */
1977 elf_s390_size_dynamic_sections (output_bfd, info)
1978 bfd *output_bfd ATTRIBUTE_UNUSED;
1979 struct bfd_link_info *info;
1981 struct elf_s390_link_hash_table *htab;
1987 htab = elf_s390_hash_table (info);
1988 dynobj = htab->elf.dynobj;
1992 if (htab->elf.dynamic_sections_created)
1994 /* Set the contents of the .interp section to the interpreter. */
1995 if (info->executable)
1997 s = bfd_get_section_by_name (dynobj, ".interp");
2000 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2001 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2005 /* Set up .got offsets for local syms, and space for local dynamic
2007 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2009 bfd_signed_vma *local_got;
2010 bfd_signed_vma *end_local_got;
2011 char *local_tls_type;
2012 bfd_size_type locsymcount;
2013 Elf_Internal_Shdr *symtab_hdr;
2016 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2019 for (s = ibfd->sections; s != NULL; s = s->next)
2021 struct elf_s390_dyn_relocs *p;
2023 for (p = *((struct elf_s390_dyn_relocs **)
2024 &elf_section_data (s)->local_dynrel);
2028 if (!bfd_is_abs_section (p->sec)
2029 && bfd_is_abs_section (p->sec->output_section))
2031 /* Input section has been discarded, either because
2032 it is a copy of a linkonce section or due to
2033 linker script /DISCARD/, so we'll be discarding
2036 else if (p->count != 0)
2038 srela = elf_section_data (p->sec)->sreloc;
2039 srela->size += p->count * sizeof (Elf32_External_Rela);
2040 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2041 info->flags |= DF_TEXTREL;
2046 local_got = elf_local_got_refcounts (ibfd);
2050 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2051 locsymcount = symtab_hdr->sh_info;
2052 end_local_got = local_got + locsymcount;
2053 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2055 srela = htab->srelgot;
2056 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2060 *local_got = s->size;
2061 s->size += GOT_ENTRY_SIZE;
2062 if (*local_tls_type == GOT_TLS_GD)
2063 s->size += GOT_ENTRY_SIZE;
2065 srela->size += sizeof (Elf32_External_Rela);
2068 *local_got = (bfd_vma) -1;
2072 if (htab->tls_ldm_got.refcount > 0)
2074 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2076 htab->tls_ldm_got.offset = htab->sgot->size;
2077 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2078 htab->srelgot->size += sizeof (Elf32_External_Rela);
2081 htab->tls_ldm_got.offset = -1;
2083 /* Allocate global sym .plt and .got entries, and space for global
2084 sym dynamic relocs. */
2085 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2087 /* We now have determined the sizes of the various dynamic sections.
2088 Allocate memory for them. */
2090 for (s = dynobj->sections; s != NULL; s = s->next)
2092 if ((s->flags & SEC_LINKER_CREATED) == 0)
2097 || s == htab->sgotplt)
2099 /* Strip this section if we don't need it; see the
2102 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2107 /* We use the reloc_count field as a counter if we need
2108 to copy relocs into the output file. */
2113 /* It's not one of our sections, so don't allocate space. */
2119 /* If we don't need this section, strip it from the
2120 output file. This is to handle .rela.bss and
2121 .rela.plt. We must create it in
2122 create_dynamic_sections, because it must be created
2123 before the linker maps input sections to output
2124 sections. The linker does that before
2125 adjust_dynamic_symbol is called, and it is that
2126 function which decides whether anything needs to go
2127 into these sections. */
2129 s->flags |= SEC_EXCLUDE;
2133 /* Allocate memory for the section contents. We use bfd_zalloc
2134 here in case unused entries are not reclaimed before the
2135 section's contents are written out. This should not happen,
2136 but this way if it does, we get a R_390_NONE reloc instead
2138 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2139 if (s->contents == NULL)
2143 if (htab->elf.dynamic_sections_created)
2145 /* Add some entries to the .dynamic section. We fill in the
2146 values later, in elf_s390_finish_dynamic_sections, but we
2147 must add the entries now so that we get the correct size for
2148 the .dynamic section. The DT_DEBUG entry is filled in by the
2149 dynamic linker and used by the debugger. */
2150 #define add_dynamic_entry(TAG, VAL) \
2151 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2153 if (info->executable)
2155 if (!add_dynamic_entry (DT_DEBUG, 0))
2159 if (htab->splt->size != 0)
2161 if (!add_dynamic_entry (DT_PLTGOT, 0)
2162 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2163 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2164 || !add_dynamic_entry (DT_JMPREL, 0))
2170 if (!add_dynamic_entry (DT_RELA, 0)
2171 || !add_dynamic_entry (DT_RELASZ, 0)
2172 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2175 /* If any dynamic relocs apply to a read-only section,
2176 then we need a DT_TEXTREL entry. */
2177 if ((info->flags & DF_TEXTREL) == 0)
2178 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2181 if ((info->flags & DF_TEXTREL) != 0)
2183 if (!add_dynamic_entry (DT_TEXTREL, 0))
2188 #undef add_dynamic_entry
2193 /* Return the base VMA address which should be subtracted from real addresses
2194 when resolving @dtpoff relocation.
2195 This is PT_TLS segment p_vaddr. */
2199 struct bfd_link_info *info;
2201 /* If tls_sec is NULL, we should have signalled an error already. */
2202 if (elf_hash_table (info)->tls_sec == NULL)
2204 return elf_hash_table (info)->tls_sec->vma;
2207 /* Return the relocation value for @tpoff relocation
2208 if STT_TLS virtual address is ADDRESS. */
2211 tpoff (info, address)
2212 struct bfd_link_info *info;
2215 struct elf_link_hash_table *htab = elf_hash_table (info);
2217 /* If tls_sec is NULL, we should have signalled an error already. */
2218 if (htab->tls_sec == NULL)
2220 return htab->tls_size + htab->tls_sec->vma - address;
2223 /* Complain if TLS instruction relocation is against an invalid
2227 invalid_tls_insn (input_bfd, input_section, rel)
2229 asection *input_section;
2230 Elf_Internal_Rela *rel;
2232 reloc_howto_type *howto;
2234 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2235 (*_bfd_error_handler)
2236 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2239 (long) rel->r_offset,
2243 /* Relocate a 390 ELF section. */
2246 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2247 contents, relocs, local_syms, local_sections)
2249 struct bfd_link_info *info;
2251 asection *input_section;
2253 Elf_Internal_Rela *relocs;
2254 Elf_Internal_Sym *local_syms;
2255 asection **local_sections;
2257 struct elf_s390_link_hash_table *htab;
2258 Elf_Internal_Shdr *symtab_hdr;
2259 struct elf_link_hash_entry **sym_hashes;
2260 bfd_vma *local_got_offsets;
2261 Elf_Internal_Rela *rel;
2262 Elf_Internal_Rela *relend;
2264 if (info->relocatable)
2267 htab = elf_s390_hash_table (info);
2268 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2269 sym_hashes = elf_sym_hashes (input_bfd);
2270 local_got_offsets = elf_local_got_offsets (input_bfd);
2273 relend = relocs + input_section->reloc_count;
2274 for (; rel < relend; rel++)
2276 unsigned int r_type;
2277 reloc_howto_type *howto;
2278 unsigned long r_symndx;
2279 struct elf_link_hash_entry *h;
2280 Elf_Internal_Sym *sym;
2284 bfd_boolean unresolved_reloc;
2285 bfd_reloc_status_type r;
2288 r_type = ELF32_R_TYPE (rel->r_info);
2289 if (r_type == (int) R_390_GNU_VTINHERIT
2290 || r_type == (int) R_390_GNU_VTENTRY)
2292 if (r_type >= (int) R_390_max)
2294 bfd_set_error (bfd_error_bad_value);
2298 howto = elf_howto_table + r_type;
2299 r_symndx = ELF32_R_SYM (rel->r_info);
2301 /* This is a final link. */
2305 unresolved_reloc = FALSE;
2306 if (r_symndx < symtab_hdr->sh_info)
2308 sym = local_syms + r_symndx;
2309 sec = local_sections[r_symndx];
2310 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2314 bfd_boolean warned ATTRIBUTE_UNUSED;
2316 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2317 r_symndx, symtab_hdr, sym_hashes,
2319 unresolved_reloc, warned);
2324 case R_390_GOTPLT12:
2325 case R_390_GOTPLT16:
2326 case R_390_GOTPLT20:
2327 case R_390_GOTPLT32:
2328 case R_390_GOTPLTENT:
2329 /* There are three cases for a GOTPLT relocation. 1) The
2330 relocation is against the jump slot entry of a plt that
2331 will get emitted to the output file. 2) The relocation
2332 is against the jump slot of a plt entry that has been
2333 removed. elf_s390_adjust_gotplt has created a GOT entry
2334 as replacement. 3) The relocation is against a local symbol.
2335 Cases 2) and 3) are the same as the GOT relocation code
2336 so we just have to test for case 1 and fall through for
2338 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2343 Current offset - size first entry / entry size. */
2344 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2347 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2349 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2350 unresolved_reloc = FALSE;
2352 if (r_type == R_390_GOTPLTENT)
2353 relocation += htab->sgot->output_section->vma;
2363 /* Relocation is to the entry for this symbol in the global
2365 if (htab->sgot == NULL)
2372 off = h->got.offset;
2373 dyn = htab->elf.dynamic_sections_created;
2374 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2380 || (ELF_ST_VISIBILITY (h->other)
2381 && h->root.type == bfd_link_hash_undefweak))
2383 /* This is actually a static link, or it is a
2384 -Bsymbolic link and the symbol is defined
2385 locally, or the symbol was forced to be local
2386 because of a version file. We must initialize
2387 this entry in the global offset table. Since the
2388 offset must always be a multiple of 2, we use the
2389 least significant bit to record whether we have
2390 initialized it already.
2392 When doing a dynamic link, we create a .rel.got
2393 relocation entry to initialize the value. This
2394 is done in the finish_dynamic_symbol routine. */
2399 bfd_put_32 (output_bfd, relocation,
2400 htab->sgot->contents + off);
2405 unresolved_reloc = FALSE;
2409 if (local_got_offsets == NULL)
2412 off = local_got_offsets[r_symndx];
2414 /* The offset must always be a multiple of 4. We use
2415 the least significant bit to record whether we have
2416 already generated the necessary reloc. */
2421 bfd_put_32 (output_bfd, relocation,
2422 htab->sgot->contents + off);
2427 Elf_Internal_Rela outrel;
2430 srelgot = htab->srelgot;
2431 if (srelgot == NULL)
2434 outrel.r_offset = (htab->sgot->output_section->vma
2435 + htab->sgot->output_offset
2437 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2438 outrel.r_addend = relocation;
2439 loc = srelgot->contents;
2440 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2441 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2444 local_got_offsets[r_symndx] |= 1;
2448 if (off >= (bfd_vma) -2)
2451 relocation = htab->sgot->output_offset + off;
2453 /* For @GOTENT the relocation is against the offset between
2454 the instruction and the symbols entry in the GOT and not
2455 between the start of the GOT and the symbols entry. We
2456 add the vma of the GOT to get the correct value. */
2457 if ( r_type == R_390_GOTENT
2458 || r_type == R_390_GOTPLTENT)
2459 relocation += htab->sgot->output_section->vma;
2463 case R_390_GOTOFF16:
2464 case R_390_GOTOFF32:
2465 /* Relocation is relative to the start of the global offset
2468 /* Note that sgot->output_offset is not involved in this
2469 calculation. We always want the start of .got. If we
2470 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2471 permitted by the ABI, we might have to change this
2473 relocation -= htab->sgot->output_section->vma;
2477 case R_390_GOTPCDBL:
2478 /* Use global offset table as symbol value. */
2479 relocation = htab->sgot->output_section->vma;
2480 unresolved_reloc = FALSE;
2483 case R_390_PLT16DBL:
2484 case R_390_PLT32DBL:
2486 /* Relocation is to the entry for this symbol in the
2487 procedure linkage table. */
2489 /* Resolve a PLT32 reloc against a local symbol directly,
2490 without using the procedure linkage table. */
2494 if (h->plt.offset == (bfd_vma) -1
2495 || htab->splt == NULL)
2497 /* We didn't make a PLT entry for this symbol. This
2498 happens when statically linking PIC code, or when
2499 using -Bsymbolic. */
2503 relocation = (htab->splt->output_section->vma
2504 + htab->splt->output_offset
2506 unresolved_reloc = FALSE;
2509 case R_390_PLTOFF16:
2510 case R_390_PLTOFF32:
2511 /* Relocation is to the entry for this symbol in the
2512 procedure linkage table relative to the start of the GOT. */
2514 /* For local symbols or if we didn't make a PLT entry for
2515 this symbol resolve the symbol directly. */
2517 || h->plt.offset == (bfd_vma) -1
2518 || htab->splt == NULL)
2520 relocation -= htab->sgot->output_section->vma;
2524 relocation = (htab->splt->output_section->vma
2525 + htab->splt->output_offset
2527 - htab->sgot->output_section->vma);
2528 unresolved_reloc = FALSE;
2538 /* r_symndx will be zero only for relocs against symbols
2539 from removed linkonce sections, or sections discarded by
2542 || (input_section->flags & SEC_ALLOC) == 0)
2547 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2548 || h->root.type != bfd_link_hash_undefweak)
2549 && ((r_type != R_390_PC16
2550 && r_type != R_390_PC16DBL
2551 && r_type != R_390_PC32DBL
2552 && r_type != R_390_PC32)
2554 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2555 || (ELIMINATE_COPY_RELOCS
2562 || h->root.type == bfd_link_hash_undefweak
2563 || h->root.type == bfd_link_hash_undefined)))
2565 Elf_Internal_Rela outrel;
2566 bfd_boolean skip, relocate;
2570 /* When generating a shared object, these relocations
2571 are copied into the output file to be resolved at run
2578 _bfd_elf_section_offset (output_bfd, info, input_section,
2580 if (outrel.r_offset == (bfd_vma) -1)
2582 else if (outrel.r_offset == (bfd_vma) -2)
2583 skip = TRUE, relocate = TRUE;
2584 outrel.r_offset += (input_section->output_section->vma
2585 + input_section->output_offset);
2588 memset (&outrel, 0, sizeof outrel);
2591 && (r_type == R_390_PC16
2592 || r_type == R_390_PC16DBL
2593 || r_type == R_390_PC32DBL
2594 || r_type == R_390_PC32
2597 || !h->def_regular))
2599 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2600 outrel.r_addend = rel->r_addend;
2604 /* This symbol is local, or marked to become local. */
2605 outrel.r_addend = relocation + rel->r_addend;
2606 if (r_type == R_390_32)
2609 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2615 if (bfd_is_abs_section (sec))
2617 else if (sec == NULL || sec->owner == NULL)
2619 bfd_set_error(bfd_error_bad_value);
2626 osec = sec->output_section;
2627 sindx = elf_section_data (osec)->dynindx;
2628 BFD_ASSERT (sindx > 0);
2630 /* We are turning this relocation into one
2631 against a section symbol, so subtract out
2632 the output section's address but not the
2633 offset of the input section in the output
2636 outrel.r_addend -= osec->vma;
2638 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2642 sreloc = elf_section_data (input_section)->sreloc;
2646 loc = sreloc->contents;
2647 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2648 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2650 /* If this reloc is against an external symbol, we do
2651 not want to fiddle with the addend. Otherwise, we
2652 need to include the symbol value so that it becomes
2653 an addend for the dynamic reloc. */
2659 /* Relocations for tls literal pool entries. */
2660 case R_390_TLS_IE32:
2663 Elf_Internal_Rela outrel;
2667 outrel.r_offset = rel->r_offset
2668 + input_section->output_section->vma
2669 + input_section->output_offset;
2670 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2671 sreloc = elf_section_data (input_section)->sreloc;
2674 loc = sreloc->contents;
2675 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2676 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2680 case R_390_TLS_GD32:
2681 case R_390_TLS_GOTIE32:
2682 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2683 tls_type = GOT_UNKNOWN;
2684 if (h == NULL && local_got_offsets)
2685 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2688 tls_type = elf_s390_hash_entry(h)->tls_type;
2689 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2690 r_type = R_390_TLS_LE32;
2692 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2693 r_type = R_390_TLS_IE32;
2695 if (r_type == R_390_TLS_LE32)
2697 /* This relocation gets optimized away by the local exec
2698 access optimization. */
2699 BFD_ASSERT (! unresolved_reloc);
2700 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2701 contents + rel->r_offset);
2705 if (htab->sgot == NULL)
2709 off = h->got.offset;
2712 if (local_got_offsets == NULL)
2715 off = local_got_offsets[r_symndx];
2724 Elf_Internal_Rela outrel;
2728 if (htab->srelgot == NULL)
2731 outrel.r_offset = (htab->sgot->output_section->vma
2732 + htab->sgot->output_offset + off);
2734 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2735 if (r_type == R_390_TLS_GD32)
2736 dr_type = R_390_TLS_DTPMOD;
2738 dr_type = R_390_TLS_TPOFF;
2739 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2740 outrel.r_addend = relocation - dtpoff_base (info);
2742 outrel.r_addend = 0;
2743 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2744 loc = htab->srelgot->contents;
2745 loc += htab->srelgot->reloc_count++
2746 * sizeof (Elf32_External_Rela);
2747 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2749 if (r_type == R_390_TLS_GD32)
2753 BFD_ASSERT (! unresolved_reloc);
2754 bfd_put_32 (output_bfd,
2755 relocation - dtpoff_base (info),
2756 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2760 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2761 outrel.r_offset += GOT_ENTRY_SIZE;
2762 outrel.r_addend = 0;
2763 htab->srelgot->reloc_count++;
2764 loc += sizeof (Elf32_External_Rela);
2765 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2772 local_got_offsets[r_symndx] |= 1;
2775 if (off >= (bfd_vma) -2)
2777 if (r_type == ELF32_R_TYPE (rel->r_info))
2779 relocation = htab->sgot->output_offset + off;
2780 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2781 relocation += htab->sgot->output_section->vma;
2782 unresolved_reloc = FALSE;
2786 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2787 contents + rel->r_offset);
2792 case R_390_TLS_GOTIE12:
2793 case R_390_TLS_GOTIE20:
2794 case R_390_TLS_IEENT:
2797 if (local_got_offsets == NULL)
2799 off = local_got_offsets[r_symndx];
2801 goto emit_tls_relocs;
2805 off = h->got.offset;
2806 tls_type = elf_s390_hash_entry(h)->tls_type;
2807 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2808 goto emit_tls_relocs;
2811 if (htab->sgot == NULL)
2814 BFD_ASSERT (! unresolved_reloc);
2815 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2816 htab->sgot->contents + off);
2817 relocation = htab->sgot->output_offset + off;
2818 if (r_type == R_390_TLS_IEENT)
2819 relocation += htab->sgot->output_section->vma;
2820 unresolved_reloc = FALSE;
2823 case R_390_TLS_LDM32:
2825 /* The literal pool entry this relocation refers to gets ignored
2826 by the optimized code of the local exec model. Do nothing
2827 and the value will turn out zero. */
2830 if (htab->sgot == NULL)
2833 off = htab->tls_ldm_got.offset;
2838 Elf_Internal_Rela outrel;
2841 if (htab->srelgot == NULL)
2844 outrel.r_offset = (htab->sgot->output_section->vma
2845 + htab->sgot->output_offset + off);
2847 bfd_put_32 (output_bfd, 0,
2848 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2849 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2850 outrel.r_addend = 0;
2851 loc = htab->srelgot->contents;
2852 loc += htab->srelgot->reloc_count++
2853 * sizeof (Elf32_External_Rela);
2854 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2855 htab->tls_ldm_got.offset |= 1;
2857 relocation = htab->sgot->output_offset + off;
2858 unresolved_reloc = FALSE;
2861 case R_390_TLS_LE32:
2864 /* Linking a shared library with non-fpic code requires
2865 a R_390_TLS_TPOFF relocation. */
2866 Elf_Internal_Rela outrel;
2871 outrel.r_offset = rel->r_offset
2872 + input_section->output_section->vma
2873 + input_section->output_offset;
2874 if (h != NULL && h->dynindx != -1)
2878 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2880 outrel.r_addend = relocation - dtpoff_base (info);
2882 outrel.r_addend = 0;
2883 sreloc = elf_section_data (input_section)->sreloc;
2886 loc = sreloc->contents;
2887 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2888 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2892 BFD_ASSERT (! unresolved_reloc);
2893 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2894 contents + rel->r_offset);
2898 case R_390_TLS_LDO32:
2899 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2900 relocation -= dtpoff_base (info);
2902 /* When converting LDO to LE, we must negate. */
2903 relocation = -tpoff (info, relocation);
2906 /* Relocations for tls instructions. */
2907 case R_390_TLS_LOAD:
2908 case R_390_TLS_GDCALL:
2909 case R_390_TLS_LDCALL:
2910 tls_type = GOT_UNKNOWN;
2911 if (h == NULL && local_got_offsets)
2912 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2914 tls_type = elf_s390_hash_entry(h)->tls_type;
2916 if (tls_type == GOT_TLS_GD)
2919 if (r_type == R_390_TLS_LOAD)
2921 if (!info->shared && (h == NULL || h->dynindx == -1))
2923 /* IE->LE transition. Four valid cases:
2924 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2925 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2926 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2927 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2928 unsigned int insn, ry;
2930 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2932 if ((insn & 0xff00f000) == 0x58000000)
2933 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2934 ry = (insn & 0x000f0000);
2935 else if ((insn & 0xff0f0000) == 0x58000000)
2936 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2937 ry = (insn & 0x0000f000) << 4;
2938 else if ((insn & 0xff00f000) == 0x5800c000)
2939 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2940 ry = (insn & 0x000f0000);
2941 else if ((insn & 0xff0f0000) == 0x580c0000)
2942 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2943 ry = (insn & 0x0000f000) << 4;
2945 invalid_tls_insn (input_bfd, input_section, rel);
2946 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2947 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2950 else if (r_type == R_390_TLS_GDCALL)
2954 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2955 if ((insn & 0xff000fff) != 0x4d000000)
2956 invalid_tls_insn (input_bfd, input_section, rel);
2957 if (!info->shared && (h == NULL || h->dynindx == -1))
2958 /* GD->LE transition.
2959 bas %r14,0(%rx,%r13) -> bc 0,0 */
2962 /* GD->IE transition.
2963 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2965 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2967 else if (r_type == R_390_TLS_LDCALL)
2973 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2974 if ((insn & 0xff000fff) != 0x4d000000)
2975 invalid_tls_insn (input_bfd, input_section, rel);
2976 /* LD->LE transition.
2977 bas %r14,0(%rx,%r13) -> bc 0,0 */
2979 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2988 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2989 because such sections are not SEC_ALLOC and thus ld.so will
2990 not process them. */
2991 if (unresolved_reloc
2992 && !((input_section->flags & SEC_DEBUGGING) != 0
2994 (*_bfd_error_handler)
2995 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
2998 (long) rel->r_offset,
2999 h->root.root.string);
3001 if (r_type == R_390_20
3002 || r_type == R_390_GOT20
3003 || r_type == R_390_GOTPLT20
3004 || r_type == R_390_TLS_GOTIE20)
3006 relocation += rel->r_addend;
3007 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3008 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3009 contents, rel->r_offset,
3013 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3014 contents, rel->r_offset,
3015 relocation, rel->r_addend);
3017 if (r != bfd_reloc_ok)
3022 name = h->root.root.string;
3025 name = bfd_elf_string_from_elf_section (input_bfd,
3026 symtab_hdr->sh_link,
3031 name = bfd_section_name (input_bfd, sec);
3034 if (r == bfd_reloc_overflow)
3037 if (! ((*info->callbacks->reloc_overflow)
3038 (info, (h ? &h->root : NULL), name, howto->name,
3039 (bfd_vma) 0, input_bfd, input_section,
3045 (*_bfd_error_handler)
3046 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3047 input_bfd, input_section,
3048 (long) rel->r_offset, name, (int) r);
3057 /* Finish up dynamic symbol handling. We set the contents of various
3058 dynamic sections here. */
3061 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3063 struct bfd_link_info *info;
3064 struct elf_link_hash_entry *h;
3065 Elf_Internal_Sym *sym;
3067 struct elf_s390_link_hash_table *htab;
3069 htab = elf_s390_hash_table (info);
3071 if (h->plt.offset != (bfd_vma) -1)
3075 Elf_Internal_Rela rela;
3077 bfd_vma relative_offset;
3079 /* This symbol has an entry in the procedure linkage table. Set
3081 if (h->dynindx == -1
3082 || htab->splt == NULL
3083 || htab->sgotplt == NULL
3084 || htab->srelplt == NULL)
3088 Current offset - size first entry / entry size. */
3089 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3091 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3093 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3095 /* S390 uses halfwords for relative branch calc! */
3096 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3097 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3098 /* If offset is > 32768, branch to a previous branch
3099 390 can only handle +-64 K jumps. */
3100 if ( -32768 > (int) relative_offset )
3102 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3104 /* Fill in the entry in the procedure linkage table. */
3107 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3108 htab->splt->contents + h->plt.offset);
3109 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3110 htab->splt->contents + h->plt.offset + 4);
3111 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3112 htab->splt->contents + h->plt.offset + 8);
3113 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3114 htab->splt->contents + h->plt.offset + 12);
3115 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3116 htab->splt->contents + h->plt.offset + 16);
3117 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3118 htab->splt->contents + h->plt.offset + 20);
3119 bfd_put_32 (output_bfd,
3120 (htab->sgotplt->output_section->vma
3121 + htab->sgotplt->output_offset
3123 htab->splt->contents + h->plt.offset + 24);
3125 else if (got_offset < 4096)
3127 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3128 htab->splt->contents + h->plt.offset);
3129 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3130 htab->splt->contents + h->plt.offset + 4);
3131 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3132 htab->splt->contents + h->plt.offset + 8);
3133 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3134 htab->splt->contents + h->plt.offset + 12);
3135 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3136 htab->splt->contents + h->plt.offset + 16);
3137 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3138 htab->splt->contents + h->plt.offset + 20);
3139 bfd_put_32 (output_bfd, (bfd_vma) 0,
3140 htab->splt->contents + h->plt.offset + 24);
3142 else if (got_offset < 32768)
3144 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3145 htab->splt->contents + h->plt.offset);
3146 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3147 htab->splt->contents + h->plt.offset + 4);
3148 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3149 htab->splt->contents + h->plt.offset + 8);
3150 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3151 htab->splt->contents + h->plt.offset + 12);
3152 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3153 htab->splt->contents + h->plt.offset + 16);
3154 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3155 htab->splt->contents + h->plt.offset + 20);
3156 bfd_put_32 (output_bfd, (bfd_vma) 0,
3157 htab->splt->contents + h->plt.offset + 24);
3161 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3162 htab->splt->contents + h->plt.offset);
3163 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3164 htab->splt->contents + h->plt.offset + 4);
3165 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3166 htab->splt->contents + h->plt.offset + 8);
3167 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3168 htab->splt->contents + h->plt.offset + 12);
3169 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3170 htab->splt->contents + h->plt.offset + 16);
3171 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3172 htab->splt->contents + h->plt.offset + 20);
3173 bfd_put_32 (output_bfd, got_offset,
3174 htab->splt->contents + h->plt.offset + 24);
3176 /* Insert offset into reloc. table here. */
3177 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3178 htab->splt->contents + h->plt.offset + 28);
3180 /* Fill in the entry in the global offset table.
3181 Points to instruction after GOT offset. */
3182 bfd_put_32 (output_bfd,
3183 (htab->splt->output_section->vma
3184 + htab->splt->output_offset
3187 htab->sgotplt->contents + got_offset);
3189 /* Fill in the entry in the .rela.plt section. */
3190 rela.r_offset = (htab->sgotplt->output_section->vma
3191 + htab->sgotplt->output_offset
3193 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3195 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3196 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3198 if (!h->def_regular)
3200 /* Mark the symbol as undefined, rather than as defined in
3201 the .plt section. Leave the value alone. This is a clue
3202 for the dynamic linker, to make function pointer
3203 comparisons work between an application and shared
3205 sym->st_shndx = SHN_UNDEF;
3209 if (h->got.offset != (bfd_vma) -1
3210 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3211 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3212 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3214 Elf_Internal_Rela rela;
3217 /* This symbol has an entry in the global offset table. Set it
3220 if (htab->sgot == NULL || htab->srelgot == NULL)
3223 rela.r_offset = (htab->sgot->output_section->vma
3224 + htab->sgot->output_offset
3225 + (h->got.offset &~ (bfd_vma) 1));
3227 /* If this is a static link, or it is a -Bsymbolic link and the
3228 symbol is defined locally or was forced to be local because
3229 of a version file, we just want to emit a RELATIVE reloc.
3230 The entry in the global offset table will already have been
3231 initialized in the relocate_section function. */
3238 BFD_ASSERT((h->got.offset & 1) != 0);
3239 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3240 rela.r_addend = (h->root.u.def.value
3241 + h->root.u.def.section->output_section->vma
3242 + h->root.u.def.section->output_offset);
3246 BFD_ASSERT((h->got.offset & 1) == 0);
3247 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3248 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3252 loc = htab->srelgot->contents;
3253 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3254 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3259 Elf_Internal_Rela rela;
3262 /* This symbols needs a copy reloc. Set it up. */
3264 if (h->dynindx == -1
3265 || (h->root.type != bfd_link_hash_defined
3266 && h->root.type != bfd_link_hash_defweak)
3267 || htab->srelbss == NULL)
3270 rela.r_offset = (h->root.u.def.value
3271 + h->root.u.def.section->output_section->vma
3272 + h->root.u.def.section->output_offset);
3273 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3275 loc = htab->srelbss->contents;
3276 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3277 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3280 /* Mark some specially defined symbols as absolute. */
3281 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3282 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3283 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3284 sym->st_shndx = SHN_ABS;
3289 /* Used to decide how to sort relocs in an optimal manner for the
3290 dynamic linker, before writing them out. */
3292 static enum elf_reloc_type_class
3293 elf_s390_reloc_type_class (rela)
3294 const Elf_Internal_Rela *rela;
3296 switch ((int) ELF32_R_TYPE (rela->r_info))
3298 case R_390_RELATIVE:
3299 return reloc_class_relative;
3300 case R_390_JMP_SLOT:
3301 return reloc_class_plt;
3303 return reloc_class_copy;
3305 return reloc_class_normal;
3309 /* Finish up the dynamic sections. */
3312 elf_s390_finish_dynamic_sections (output_bfd, info)
3314 struct bfd_link_info *info;
3316 struct elf_s390_link_hash_table *htab;
3320 htab = elf_s390_hash_table (info);
3321 dynobj = htab->elf.dynobj;
3322 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3324 if (htab->elf.dynamic_sections_created)
3326 Elf32_External_Dyn *dyncon, *dynconend;
3328 if (sdyn == NULL || htab->sgot == NULL)
3331 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3332 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3333 for (; dyncon < dynconend; dyncon++)
3335 Elf_Internal_Dyn dyn;
3338 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3346 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3350 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3354 s = htab->srelplt->output_section;
3355 dyn.d_un.d_val = s->size;
3359 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3362 /* Fill in the special first entry in the procedure linkage table. */
3363 if (htab->splt && htab->splt->size > 0)
3365 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3368 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3369 htab->splt->contents );
3370 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3371 htab->splt->contents +4 );
3372 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3373 htab->splt->contents +8 );
3374 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3375 htab->splt->contents +12 );
3376 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3377 htab->splt->contents +16 );
3381 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3382 htab->splt->contents );
3383 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3384 htab->splt->contents +4 );
3385 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3386 htab->splt->contents +8 );
3387 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3388 htab->splt->contents +12 );
3389 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3390 htab->splt->contents +16 );
3391 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3392 htab->splt->contents +20 );
3393 bfd_put_32 (output_bfd,
3394 htab->sgotplt->output_section->vma
3395 + htab->sgotplt->output_offset,
3396 htab->splt->contents + 24);
3398 elf_section_data (htab->splt->output_section)
3399 ->this_hdr.sh_entsize = 4;
3406 /* Fill in the first three entries in the global offset table. */
3407 if (htab->sgotplt->size > 0)
3409 bfd_put_32 (output_bfd,
3410 (sdyn == NULL ? (bfd_vma) 0
3411 : sdyn->output_section->vma + sdyn->output_offset),
3412 htab->sgotplt->contents);
3413 /* One entry for shared object struct ptr. */
3414 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3415 /* One entry for _dl_runtime_resolve. */
3416 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3419 elf_section_data (htab->sgotplt->output_section)
3420 ->this_hdr.sh_entsize = 4;
3426 elf_s390_grok_prstatus (abfd, note)
3428 Elf_Internal_Note * note;
3433 switch (note->descsz)
3438 case 224: /* S/390 Linux. */
3440 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3443 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3451 /* Make a ".reg/999" section. */
3452 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3453 size, note->descpos + offset);
3456 /* Return address for Ith PLT stub in section PLT, for relocation REL
3457 or (bfd_vma) -1 if it should not be included. */
3460 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3461 const arelent *rel ATTRIBUTE_UNUSED)
3463 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3467 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3468 #define TARGET_BIG_NAME "elf32-s390"
3469 #define ELF_ARCH bfd_arch_s390
3470 #define ELF_MACHINE_CODE EM_S390
3471 #define ELF_MACHINE_ALT1 EM_S390_OLD
3472 #define ELF_MAXPAGESIZE 0x1000
3474 #define elf_backend_can_gc_sections 1
3475 #define elf_backend_can_refcount 1
3476 #define elf_backend_want_got_plt 1
3477 #define elf_backend_plt_readonly 1
3478 #define elf_backend_want_plt_sym 0
3479 #define elf_backend_got_header_size 12
3480 #define elf_backend_rela_normal 1
3482 #define elf_info_to_howto elf_s390_info_to_howto
3484 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3485 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3486 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3488 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3489 #define elf_backend_check_relocs elf_s390_check_relocs
3490 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3491 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3492 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3493 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3494 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3495 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3496 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3497 #define elf_backend_relocate_section elf_s390_relocate_section
3498 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3499 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3500 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3501 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3503 #define bfd_elf32_mkobject elf_s390_mkobject
3504 #define elf_backend_object_p elf_s390_object_p
3506 #include "elf32-target.h"