1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006
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 ((struct bfd_link_info *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 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 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
357 case R_390_GNU_VTINHERIT:
358 cache_ptr->howto = &elf32_s390_vtinherit_howto;
361 case R_390_GNU_VTENTRY:
362 cache_ptr->howto = &elf32_s390_vtentry_howto;
366 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
368 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
372 cache_ptr->howto = &elf_howto_table[r_type];
376 /* A relocation function which doesn't do anything. */
377 static bfd_reloc_status_type
378 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
379 output_bfd, error_message)
380 bfd *abfd ATTRIBUTE_UNUSED;
381 arelent *reloc_entry;
382 asymbol *symbol ATTRIBUTE_UNUSED;
383 PTR data ATTRIBUTE_UNUSED;
384 asection *input_section;
386 char **error_message ATTRIBUTE_UNUSED;
389 reloc_entry->address += input_section->output_offset;
393 /* Handle the large displacement relocs. */
394 static bfd_reloc_status_type
395 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
396 output_bfd, error_message)
397 bfd *abfd ATTRIBUTE_UNUSED;
398 arelent *reloc_entry;
400 PTR data ATTRIBUTE_UNUSED;
401 asection *input_section;
403 char **error_message ATTRIBUTE_UNUSED;
405 reloc_howto_type *howto = reloc_entry->howto;
409 if (output_bfd != (bfd *) NULL
410 && (symbol->flags & BSF_SECTION_SYM) == 0
411 && (! howto->partial_inplace
412 || reloc_entry->addend == 0))
414 reloc_entry->address += input_section->output_offset;
418 if (output_bfd != NULL)
419 return bfd_reloc_continue;
421 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
422 return bfd_reloc_outofrange;
424 relocation = (symbol->value
425 + symbol->section->output_section->vma
426 + symbol->section->output_offset);
427 relocation += reloc_entry->addend;
428 if (howto->pc_relative)
430 relocation -= (input_section->output_section->vma
431 + input_section->output_offset);
432 relocation -= reloc_entry->address;
435 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
436 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
437 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
439 if ((bfd_signed_vma) relocation < - 0x80000
440 || (bfd_signed_vma) relocation > 0x7ffff)
441 return bfd_reloc_overflow;
447 elf_s390_is_local_label_name (abfd, name)
451 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
454 return _bfd_elf_is_local_label_name (abfd, name);
457 /* Functions for the 390 ELF linker. */
459 /* The name of the dynamic interpreter. This is put in the .interp
462 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
464 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
465 copying dynamic variables from a shared lib into an app's dynbss
466 section, and instead use a dynamic relocation to point into the
468 #define ELIMINATE_COPY_RELOCS 1
470 /* The size in bytes of the first entry in the procedure linkage table. */
471 #define PLT_FIRST_ENTRY_SIZE 32
472 /* The size in bytes of an entry in the procedure linkage table. */
473 #define PLT_ENTRY_SIZE 32
475 #define GOT_ENTRY_SIZE 4
477 /* The first three entries in a procedure linkage table are reserved,
478 and the initial contents are unimportant (we zero them out).
479 Subsequent entries look like this. See the SVR4 ABI 386
480 supplement to see how this works. */
482 /* For the s390, simple addr offset can only be 0 - 4096.
483 To use the full 2 GB address space, several instructions
484 are needed to load an address in a register and execute
485 a branch( or just saving the address)
487 Furthermore, only r 0 and 1 are free to use!!! */
489 /* The first 3 words in the GOT are then reserved.
490 Word 0 is the address of the dynamic table.
491 Word 1 is a pointer to a structure describing the object
492 Word 2 is used to point to the loader entry address.
494 The code for position independent PLT entries looks like this:
496 r12 holds addr of the current GOT at entry to the PLT
498 The GOT holds the address in the PLT to be executed.
499 The loader then gets:
500 24(15) = Pointer to the structure describing the object.
501 28(15) = Offset in symbol table
503 The loader must then find the module where the function is
504 and insert the address in the GOT.
506 Note: 390 can only address +- 64 K relative.
507 We check if offset > 65536, then make a relative branch -64xxx
508 back to a previous defined branch
510 PLT1: BASR 1,0 # 2 bytes
511 L 1,22(1) # 4 bytes Load offset in GOT in r 1
512 L 1,(1,12) # 4 bytes Load address from GOT in r1
513 BCR 15,1 # 2 bytes Jump to address
514 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
515 L 1,14(1) # 4 bytes Load offset in symol table in r1
516 BRC 15,-x # 4 bytes Jump to start of PLT
517 .word 0 # 2 bytes filler
518 .long ? # 4 bytes offset in GOT
519 .long ? # 4 bytes offset into symbol table
521 This was the general case. There are two additional, optimizes PLT
522 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
523 First the one for GOT offsets < 4096:
525 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
526 BCR 15,1 # 2 bytes Jump to address
527 .word 0,0,0 # 6 bytes filler
528 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
529 L 1,14(1) # 4 bytes Load offset in symbol table in r1
530 BRC 15,-x # 4 bytes Jump to start of PLT
531 .word 0,0,0 # 6 bytes filler
532 .long ? # 4 bytes offset into symbol table
534 Second the one for GOT offsets < 32768:
536 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
537 L 1,(1,12) # 4 bytes Load address from GOT to r1
538 BCR 15,1 # 2 bytes Jump to address
539 .word 0 # 2 bytes filler
540 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
541 L 1,14(1) # 4 bytes Load offset in symbol table in r1
542 BRC 15,-x # 4 bytes Jump to start of PLT
543 .word 0,0,0 # 6 bytes filler
544 .long ? # 4 bytes offset into symbol table
546 Total = 32 bytes per PLT entry
548 The code for static build PLT entries looks like this:
550 PLT1: BASR 1,0 # 2 bytes
551 L 1,22(1) # 4 bytes Load address of GOT entry
552 L 1,0(0,1) # 4 bytes Load address from GOT in r1
553 BCR 15,1 # 2 bytes Jump to address
554 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
555 L 1,14(1) # 4 bytes Load offset in symbol table in r1
556 BRC 15,-x # 4 bytes Jump to start of PLT
557 .word 0 # 2 bytes filler
558 .long ? # 4 bytes address of GOT entry
559 .long ? # 4 bytes offset into symbol table */
561 #define PLT_PIC_ENTRY_WORD0 0x0d105810
562 #define PLT_PIC_ENTRY_WORD1 0x10165811
563 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
564 #define PLT_PIC_ENTRY_WORD3 0x0d105810
565 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
567 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
568 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
569 #define PLT_PIC12_ENTRY_WORD2 0x00000000
570 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
571 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
573 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
574 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
575 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
576 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
577 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
579 #define PLT_ENTRY_WORD0 0x0d105810
580 #define PLT_ENTRY_WORD1 0x10165810
581 #define PLT_ENTRY_WORD2 0x100007f1
582 #define PLT_ENTRY_WORD3 0x0d105810
583 #define PLT_ENTRY_WORD4 0x100ea7f4
585 /* The first PLT entry pushes the offset into the symbol table
586 from R1 onto the stack at 8(15) and the loader object info
587 at 12(15), loads the loader address in R1 and jumps to it. */
589 /* The first entry in the PLT for PIC code:
592 ST 1,28(15) # R1 has offset into symbol table
593 L 1,4(12) # Get loader ino(object struct address)
594 ST 1,24(15) # Store address
595 L 1,8(12) # Entry address of loader in R1
596 BR 1 # Jump to loader
598 The first entry in the PLT for static code:
601 ST 1,28(15) # R1 has offset into symbol table
603 L 1,18(0,1) # Get address of GOT
604 MVC 24(4,15),4(1) # Move loader ino to stack
605 L 1,8(1) # Get address of loader
606 BR 1 # Jump to loader
608 .long got # address of GOT */
610 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
611 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
612 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
613 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
614 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
616 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
617 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
618 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
619 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
620 #define PLT_FIRST_ENTRY_WORD4 0x58101008
621 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
623 /* The s390 linker needs to keep track of the number of relocs that it
624 decides to copy as dynamic relocs in check_relocs for each symbol.
625 This is so that it can later discard them if they are found to be
626 unnecessary. We store the information in a field extending the
627 regular ELF linker hash table. */
629 struct elf_s390_dyn_relocs
631 struct elf_s390_dyn_relocs *next;
633 /* The input section of the reloc. */
636 /* Total number of relocs copied for the input section. */
639 /* Number of pc-relative relocs copied for the input section. */
640 bfd_size_type pc_count;
643 /* s390 ELF linker hash entry. */
645 struct elf_s390_link_hash_entry
647 struct elf_link_hash_entry elf;
649 /* Track dynamic relocs copied for this symbol. */
650 struct elf_s390_dyn_relocs *dyn_relocs;
652 /* Number of GOTPLT references for a function. */
653 bfd_signed_vma gotplt_refcount;
655 #define GOT_UNKNOWN 0
659 #define GOT_TLS_IE_NLT 4
660 unsigned char tls_type;
663 #define elf_s390_hash_entry(ent) \
664 ((struct elf_s390_link_hash_entry *)(ent))
666 struct elf_s390_obj_tdata
668 struct elf_obj_tdata root;
670 /* tls_type for each local got entry. */
671 char *local_got_tls_type;
674 #define elf_s390_tdata(abfd) \
675 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
677 #define elf_s390_local_got_tls_type(abfd) \
678 (elf_s390_tdata (abfd)->local_got_tls_type)
681 elf_s390_mkobject (abfd)
684 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
685 abfd->tdata.any = bfd_zalloc (abfd, amt);
686 if (abfd->tdata.any == NULL)
692 elf_s390_object_p (abfd)
695 /* Set the right machine number for an s390 elf32 file. */
696 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
699 /* s390 ELF linker hash table. */
701 struct elf_s390_link_hash_table
703 struct elf_link_hash_table elf;
705 /* Short-cuts to get to dynamic linker sections. */
715 bfd_signed_vma refcount;
719 /* Small local sym to section mapping cache. */
720 struct sym_sec_cache sym_sec;
723 /* Get the s390 ELF linker hash table from a link_info structure. */
725 #define elf_s390_hash_table(p) \
726 ((struct elf_s390_link_hash_table *) ((p)->hash))
728 /* Create an entry in an s390 ELF linker hash table. */
730 static struct bfd_hash_entry *
731 link_hash_newfunc (entry, table, string)
732 struct bfd_hash_entry *entry;
733 struct bfd_hash_table *table;
736 /* Allocate the structure if it has not already been allocated by a
740 entry = bfd_hash_allocate (table,
741 sizeof (struct elf_s390_link_hash_entry));
746 /* Call the allocation method of the superclass. */
747 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
750 struct elf_s390_link_hash_entry *eh;
752 eh = (struct elf_s390_link_hash_entry *) entry;
753 eh->dyn_relocs = NULL;
754 eh->gotplt_refcount = 0;
755 eh->tls_type = GOT_UNKNOWN;
761 /* Create an s390 ELF linker hash table. */
763 static struct bfd_link_hash_table *
764 elf_s390_link_hash_table_create (abfd)
767 struct elf_s390_link_hash_table *ret;
768 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
770 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
774 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
775 sizeof (struct elf_s390_link_hash_entry)))
788 ret->tls_ldm_got.refcount = 0;
789 ret->sym_sec.abfd = NULL;
791 return &ret->elf.root;
794 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
795 shortcuts to them in our hash table. */
798 create_got_section (dynobj, info)
800 struct bfd_link_info *info;
802 struct elf_s390_link_hash_table *htab;
804 if (! _bfd_elf_create_got_section (dynobj, info))
807 htab = elf_s390_hash_table (info);
808 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
809 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
810 if (!htab->sgot || !htab->sgotplt)
813 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
814 (SEC_ALLOC | SEC_LOAD
819 if (htab->srelgot == NULL
820 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
825 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
826 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
830 elf_s390_create_dynamic_sections (dynobj, info)
832 struct bfd_link_info *info;
834 struct elf_s390_link_hash_table *htab;
836 htab = elf_s390_hash_table (info);
837 if (!htab->sgot && !create_got_section (dynobj, info))
840 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
843 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
844 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
845 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
847 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
849 if (!htab->splt || !htab->srelplt || !htab->sdynbss
850 || (!info->shared && !htab->srelbss))
856 /* Copy the extra info we tack onto an elf_link_hash_entry. */
859 elf_s390_copy_indirect_symbol (info, dir, ind)
860 struct bfd_link_info *info;
861 struct elf_link_hash_entry *dir, *ind;
863 struct elf_s390_link_hash_entry *edir, *eind;
865 edir = (struct elf_s390_link_hash_entry *) dir;
866 eind = (struct elf_s390_link_hash_entry *) ind;
868 if (eind->dyn_relocs != NULL)
870 if (edir->dyn_relocs != NULL)
872 struct elf_s390_dyn_relocs **pp;
873 struct elf_s390_dyn_relocs *p;
875 /* Add reloc counts against the indirect sym to the direct sym
876 list. Merge any entries against the same section. */
877 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
879 struct elf_s390_dyn_relocs *q;
881 for (q = edir->dyn_relocs; q != NULL; q = q->next)
882 if (q->sec == p->sec)
884 q->pc_count += p->pc_count;
885 q->count += p->count;
892 *pp = edir->dyn_relocs;
895 edir->dyn_relocs = eind->dyn_relocs;
896 eind->dyn_relocs = NULL;
899 if (ind->root.type == bfd_link_hash_indirect
900 && dir->got.refcount <= 0)
902 edir->tls_type = eind->tls_type;
903 eind->tls_type = GOT_UNKNOWN;
906 if (ELIMINATE_COPY_RELOCS
907 && ind->root.type != bfd_link_hash_indirect
908 && dir->dynamic_adjusted)
910 /* If called to transfer flags for a weakdef during processing
911 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
912 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
913 dir->ref_dynamic |= ind->ref_dynamic;
914 dir->ref_regular |= ind->ref_regular;
915 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
916 dir->needs_plt |= ind->needs_plt;
919 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
923 elf_s390_tls_transition (info, r_type, is_local)
924 struct bfd_link_info *info;
936 return R_390_TLS_LE32;
937 return R_390_TLS_IE32;
938 case R_390_TLS_GOTIE32:
940 return R_390_TLS_LE32;
941 return R_390_TLS_GOTIE32;
942 case R_390_TLS_LDM32:
943 return R_390_TLS_LE32;
949 /* Look through the relocs for a section during the first phase, and
950 allocate space in the global offset table or procedure linkage
954 elf_s390_check_relocs (abfd, info, sec, relocs)
956 struct bfd_link_info *info;
958 const Elf_Internal_Rela *relocs;
960 struct elf_s390_link_hash_table *htab;
961 Elf_Internal_Shdr *symtab_hdr;
962 struct elf_link_hash_entry **sym_hashes;
963 const Elf_Internal_Rela *rel;
964 const Elf_Internal_Rela *rel_end;
966 bfd_signed_vma *local_got_refcounts;
967 int tls_type, old_tls_type;
969 if (info->relocatable)
972 htab = elf_s390_hash_table (info);
973 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
974 sym_hashes = elf_sym_hashes (abfd);
975 local_got_refcounts = elf_local_got_refcounts (abfd);
979 rel_end = relocs + sec->reloc_count;
980 for (rel = relocs; rel < rel_end; rel++)
983 unsigned long r_symndx;
984 struct elf_link_hash_entry *h;
986 r_symndx = ELF32_R_SYM (rel->r_info);
988 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
990 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
995 if (r_symndx < symtab_hdr->sh_info)
999 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1000 while (h->root.type == bfd_link_hash_indirect
1001 || h->root.type == bfd_link_hash_warning)
1002 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1005 /* Create got section and local_got_refcounts array if they
1007 r_type = elf_s390_tls_transition (info,
1008 ELF32_R_TYPE (rel->r_info),
1017 case R_390_GOTPLT12:
1018 case R_390_GOTPLT16:
1019 case R_390_GOTPLT20:
1020 case R_390_GOTPLT32:
1021 case R_390_GOTPLTENT:
1022 case R_390_TLS_GD32:
1023 case R_390_TLS_GOTIE12:
1024 case R_390_TLS_GOTIE20:
1025 case R_390_TLS_GOTIE32:
1026 case R_390_TLS_IEENT:
1027 case R_390_TLS_IE32:
1028 case R_390_TLS_LDM32:
1030 && local_got_refcounts == NULL)
1034 size = symtab_hdr->sh_info;
1035 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1036 local_got_refcounts = ((bfd_signed_vma *)
1037 bfd_zalloc (abfd, size));
1038 if (local_got_refcounts == NULL)
1040 elf_local_got_refcounts (abfd) = local_got_refcounts;
1041 elf_s390_local_got_tls_type (abfd)
1042 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1045 case R_390_GOTOFF16:
1046 case R_390_GOTOFF32:
1048 case R_390_GOTPCDBL:
1049 if (htab->sgot == NULL)
1051 if (htab->elf.dynobj == NULL)
1052 htab->elf.dynobj = abfd;
1053 if (!create_got_section (htab->elf.dynobj, info))
1060 case R_390_GOTOFF16:
1061 case R_390_GOTOFF32:
1063 case R_390_GOTPCDBL:
1064 /* Got is created, nothing to be done. */
1067 case R_390_PLT16DBL:
1068 case R_390_PLT32DBL:
1070 case R_390_PLTOFF16:
1071 case R_390_PLTOFF32:
1072 /* This symbol requires a procedure linkage table entry. We
1073 actually build the entry in adjust_dynamic_symbol,
1074 because this might be a case of linking PIC code which is
1075 never referenced by a dynamic object, in which case we
1076 don't need to generate a procedure linkage table entry
1079 /* If this is a local symbol, we resolve it directly without
1080 creating a procedure linkage table entry. */
1084 h->plt.refcount += 1;
1088 case R_390_GOTPLT12:
1089 case R_390_GOTPLT16:
1090 case R_390_GOTPLT20:
1091 case R_390_GOTPLT32:
1092 case R_390_GOTPLTENT:
1093 /* This symbol requires either a procedure linkage table entry
1094 or an entry in the local got. We actually build the entry
1095 in adjust_dynamic_symbol because whether this is really a
1096 global reference can change and with it the fact if we have
1097 to create a plt entry or a local got entry. To be able to
1098 make a once global symbol a local one we have to keep track
1099 of the number of gotplt references that exist for this
1103 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1105 h->plt.refcount += 1;
1108 local_got_refcounts[r_symndx] += 1;
1111 case R_390_TLS_LDM32:
1112 htab->tls_ldm_got.refcount += 1;
1115 case R_390_TLS_IE32:
1116 case R_390_TLS_GOTIE12:
1117 case R_390_TLS_GOTIE20:
1118 case R_390_TLS_GOTIE32:
1119 case R_390_TLS_IEENT:
1121 info->flags |= DF_STATIC_TLS;
1129 case R_390_TLS_GD32:
1130 /* This symbol requires a global offset table entry. */
1139 tls_type = GOT_NORMAL;
1141 case R_390_TLS_GD32:
1142 tls_type = GOT_TLS_GD;
1144 case R_390_TLS_IE32:
1145 case R_390_TLS_GOTIE32:
1146 tls_type = GOT_TLS_IE;
1148 case R_390_TLS_GOTIE12:
1149 case R_390_TLS_GOTIE20:
1150 case R_390_TLS_IEENT:
1151 tls_type = GOT_TLS_IE_NLT;
1157 h->got.refcount += 1;
1158 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1162 local_got_refcounts[r_symndx] += 1;
1163 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1165 /* If a TLS symbol is accessed using IE at least once,
1166 there is no point to use dynamic model for it. */
1167 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1169 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1171 (*_bfd_error_handler)
1172 (_("%B: `%s' accessed both as normal and thread local symbol"),
1173 abfd, h->root.root.string);
1176 if (old_tls_type > tls_type)
1177 tls_type = old_tls_type;
1180 if (old_tls_type != tls_type)
1183 elf_s390_hash_entry (h)->tls_type = tls_type;
1185 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1188 if (r_type != R_390_TLS_IE32)
1192 case R_390_TLS_LE32:
1195 info->flags |= DF_STATIC_TLS;
1205 if (h != NULL && !info->shared)
1207 /* If this reloc is in a read-only section, we might
1208 need a copy reloc. We can't check reliably at this
1209 stage whether the section is read-only, as input
1210 sections have not yet been mapped to output sections.
1211 Tentatively set the flag for now, and correct in
1212 adjust_dynamic_symbol. */
1215 /* We may need a .plt entry if the function this reloc
1216 refers to is in a shared lib. */
1217 h->plt.refcount += 1;
1220 /* If we are creating a shared library, and this is a reloc
1221 against a global symbol, or a non PC relative reloc
1222 against a local symbol, then we need to copy the reloc
1223 into the shared library. However, if we are linking with
1224 -Bsymbolic, we do not need to copy a reloc against a
1225 global symbol which is defined in an object we are
1226 including in the link (i.e., DEF_REGULAR is set). At
1227 this point we have not seen all the input files, so it is
1228 possible that DEF_REGULAR is not set now but will be set
1229 later (it is never cleared). In case of a weak definition,
1230 DEF_REGULAR may be cleared later by a strong definition in
1231 a shared library. We account for that possibility below by
1232 storing information in the relocs_copied field of the hash
1233 table entry. A similar situation occurs when creating
1234 shared libraries and symbol visibility changes render the
1237 If on the other hand, we are creating an executable, we
1238 may need to keep relocations for symbols satisfied by a
1239 dynamic library if we manage to avoid copy relocs for the
1242 && (sec->flags & SEC_ALLOC) != 0
1243 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1244 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1245 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1246 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1248 && (! info->symbolic
1249 || h->root.type == bfd_link_hash_defweak
1250 || !h->def_regular))))
1251 || (ELIMINATE_COPY_RELOCS
1253 && (sec->flags & SEC_ALLOC) != 0
1255 && (h->root.type == bfd_link_hash_defweak
1256 || !h->def_regular)))
1258 struct elf_s390_dyn_relocs *p;
1259 struct elf_s390_dyn_relocs **head;
1261 /* We must copy these reloc types into the output file.
1262 Create a reloc section in dynobj and make room for
1269 name = (bfd_elf_string_from_elf_section
1271 elf_elfheader (abfd)->e_shstrndx,
1272 elf_section_data (sec)->rel_hdr.sh_name));
1276 if (strncmp (name, ".rela", 5) != 0
1277 || strcmp (bfd_get_section_name (abfd, sec),
1280 (*_bfd_error_handler)
1281 (_("%B: bad relocation section name `%s\'"),
1285 if (htab->elf.dynobj == NULL)
1286 htab->elf.dynobj = abfd;
1288 dynobj = htab->elf.dynobj;
1289 sreloc = bfd_get_section_by_name (dynobj, name);
1294 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1295 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1296 if ((sec->flags & SEC_ALLOC) != 0)
1297 flags |= SEC_ALLOC | SEC_LOAD;
1298 sreloc = bfd_make_section_with_flags (dynobj,
1302 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1305 elf_section_data (sec)->sreloc = sreloc;
1308 /* If this is a global symbol, we count the number of
1309 relocations we need for this symbol. */
1312 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1316 /* Track dynamic relocs needed for local syms too.
1317 We really need local syms available to do this
1322 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1327 vpp = &elf_section_data (s)->local_dynrel;
1328 head = (struct elf_s390_dyn_relocs **) vpp;
1332 if (p == NULL || p->sec != sec)
1334 bfd_size_type amt = sizeof *p;
1336 p = ((struct elf_s390_dyn_relocs *)
1337 bfd_alloc (htab->elf.dynobj, amt));
1348 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1349 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1356 /* This relocation describes the C++ object vtable hierarchy.
1357 Reconstruct it for later use during GC. */
1358 case R_390_GNU_VTINHERIT:
1359 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1363 /* This relocation describes which C++ vtable entries are actually
1364 used. Record for later use during GC. */
1365 case R_390_GNU_VTENTRY:
1366 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1378 /* Return the section that should be marked against GC for a given
1382 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1384 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1385 Elf_Internal_Rela *rel;
1386 struct elf_link_hash_entry *h;
1387 Elf_Internal_Sym *sym;
1391 switch (ELF32_R_TYPE (rel->r_info))
1393 case R_390_GNU_VTINHERIT:
1394 case R_390_GNU_VTENTRY:
1398 switch (h->root.type)
1400 case bfd_link_hash_defined:
1401 case bfd_link_hash_defweak:
1402 return h->root.u.def.section;
1404 case bfd_link_hash_common:
1405 return h->root.u.c.p->section;
1413 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1418 /* Update the got entry reference counts for the section being removed. */
1421 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1423 struct bfd_link_info *info;
1425 const Elf_Internal_Rela *relocs;
1427 Elf_Internal_Shdr *symtab_hdr;
1428 struct elf_link_hash_entry **sym_hashes;
1429 bfd_signed_vma *local_got_refcounts;
1430 const Elf_Internal_Rela *rel, *relend;
1432 elf_section_data (sec)->local_dynrel = NULL;
1434 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1435 sym_hashes = elf_sym_hashes (abfd);
1436 local_got_refcounts = elf_local_got_refcounts (abfd);
1438 relend = relocs + sec->reloc_count;
1439 for (rel = relocs; rel < relend; rel++)
1441 unsigned long r_symndx;
1442 unsigned int r_type;
1443 struct elf_link_hash_entry *h = NULL;
1445 r_symndx = ELF32_R_SYM (rel->r_info);
1446 if (r_symndx >= symtab_hdr->sh_info)
1448 struct elf_s390_link_hash_entry *eh;
1449 struct elf_s390_dyn_relocs **pp;
1450 struct elf_s390_dyn_relocs *p;
1452 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1453 while (h->root.type == bfd_link_hash_indirect
1454 || h->root.type == bfd_link_hash_warning)
1455 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1456 eh = (struct elf_s390_link_hash_entry *) h;
1458 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1461 /* Everything must go for SEC. */
1467 r_type = ELF32_R_TYPE (rel->r_info);
1468 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1471 case R_390_TLS_LDM32:
1472 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1473 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1476 case R_390_TLS_GD32:
1477 case R_390_TLS_IE32:
1478 case R_390_TLS_GOTIE12:
1479 case R_390_TLS_GOTIE20:
1480 case R_390_TLS_GOTIE32:
1481 case R_390_TLS_IEENT:
1486 case R_390_GOTOFF16:
1487 case R_390_GOTOFF32:
1489 case R_390_GOTPCDBL:
1493 if (h->got.refcount > 0)
1494 h->got.refcount -= 1;
1496 else if (local_got_refcounts != NULL)
1498 if (local_got_refcounts[r_symndx] > 0)
1499 local_got_refcounts[r_symndx] -= 1;
1516 case R_390_PLT16DBL:
1517 case R_390_PLT32DBL:
1519 case R_390_PLTOFF16:
1520 case R_390_PLTOFF32:
1523 if (h->plt.refcount > 0)
1524 h->plt.refcount -= 1;
1528 case R_390_GOTPLT12:
1529 case R_390_GOTPLT16:
1530 case R_390_GOTPLT20:
1531 case R_390_GOTPLT32:
1532 case R_390_GOTPLTENT:
1535 if (h->plt.refcount > 0)
1537 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1538 h->plt.refcount -= 1;
1541 else if (local_got_refcounts != NULL)
1543 if (local_got_refcounts[r_symndx] > 0)
1544 local_got_refcounts[r_symndx] -= 1;
1556 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1557 entry but we found we will not create any. Called when we find we will
1558 not have any PLT for this symbol, by for example
1559 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1560 or elf_s390_size_dynamic_sections if no dynamic sections will be
1561 created (we're only linking static objects). */
1564 elf_s390_adjust_gotplt (h)
1565 struct elf_s390_link_hash_entry *h;
1567 if (h->elf.root.type == bfd_link_hash_warning)
1568 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1570 if (h->gotplt_refcount <= 0)
1573 /* We simply add the number of gotplt references to the number
1574 * of got references for this symbol. */
1575 h->elf.got.refcount += h->gotplt_refcount;
1576 h->gotplt_refcount = -1;
1579 /* Adjust a symbol defined by a dynamic object and referenced by a
1580 regular object. The current definition is in some section of the
1581 dynamic object, but we're not including those sections. We have to
1582 change the definition to something the rest of the link can
1586 elf_s390_adjust_dynamic_symbol (info, h)
1587 struct bfd_link_info *info;
1588 struct elf_link_hash_entry *h;
1590 struct elf_s390_link_hash_table *htab;
1592 unsigned int power_of_two;
1594 /* If this is a function, put it in the procedure linkage table. We
1595 will fill in the contents of the procedure linkage table later
1596 (although we could actually do it here). */
1597 if (h->type == STT_FUNC
1600 if (h->plt.refcount <= 0
1604 && h->root.type != bfd_link_hash_undefweak
1605 && h->root.type != bfd_link_hash_undefined))
1607 /* This case can occur if we saw a PLT32 reloc in an input
1608 file, but the symbol was never referred to by a dynamic
1609 object, or if all references were garbage collected. In
1610 such a case, we don't actually need to build a procedure
1611 linkage table, and we can just do a PC32 reloc instead. */
1612 h->plt.offset = (bfd_vma) -1;
1614 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1620 /* It's possible that we incorrectly decided a .plt reloc was
1621 needed for an R_390_PC32 reloc to a non-function sym in
1622 check_relocs. We can't decide accurately between function and
1623 non-function syms in check-relocs; Objects loaded later in
1624 the link may change h->type. So fix it now. */
1625 h->plt.offset = (bfd_vma) -1;
1627 /* If this is a weak symbol, and there is a real definition, the
1628 processor independent code will have arranged for us to see the
1629 real definition first, and we can just use the same value. */
1630 if (h->u.weakdef != NULL)
1632 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1633 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1634 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1635 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1636 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1637 h->non_got_ref = h->u.weakdef->non_got_ref;
1641 /* This is a reference to a symbol defined by a dynamic object which
1642 is not a function. */
1644 /* If we are creating a shared library, we must presume that the
1645 only references to the symbol are via the global offset table.
1646 For such cases we need not do anything here; the relocations will
1647 be handled correctly by relocate_section. */
1651 /* If there are no references to this symbol that do not use the
1652 GOT, we don't need to generate a copy reloc. */
1653 if (!h->non_got_ref)
1656 /* If -z nocopyreloc was given, we won't generate them either. */
1657 if (info->nocopyreloc)
1663 if (ELIMINATE_COPY_RELOCS)
1665 struct elf_s390_link_hash_entry * eh;
1666 struct elf_s390_dyn_relocs *p;
1668 eh = (struct elf_s390_link_hash_entry *) h;
1669 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1671 s = p->sec->output_section;
1672 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1676 /* If we didn't find any dynamic relocs in read-only sections, then
1677 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1687 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1688 h->root.root.string);
1692 /* We must allocate the symbol in our .dynbss section, which will
1693 become part of the .bss section of the executable. There will be
1694 an entry for this symbol in the .dynsym section. The dynamic
1695 object will contain position independent code, so all references
1696 from the dynamic object to this symbol will go through the global
1697 offset table. The dynamic linker will use the .dynsym entry to
1698 determine the address it must put in the global offset table, so
1699 both the dynamic object and the regular object will refer to the
1700 same memory location for the variable. */
1702 htab = elf_s390_hash_table (info);
1704 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1705 copy the initial value out of the dynamic object and into the
1706 runtime process image. */
1707 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1709 htab->srelbss->size += sizeof (Elf32_External_Rela);
1713 /* We need to figure out the alignment required for this symbol. I
1714 have no idea how ELF linkers handle this. */
1715 power_of_two = bfd_log2 (h->size);
1716 if (power_of_two > 3)
1719 /* Apply the required alignment. */
1721 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1722 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1724 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1728 /* Define the symbol as being at this point in the section. */
1729 h->root.u.def.section = s;
1730 h->root.u.def.value = s->size;
1732 /* Increment the section size to make room for the symbol. */
1738 /* Allocate space in .plt, .got and associated reloc sections for
1742 allocate_dynrelocs (h, inf)
1743 struct elf_link_hash_entry *h;
1746 struct bfd_link_info *info;
1747 struct elf_s390_link_hash_table *htab;
1748 struct elf_s390_link_hash_entry *eh;
1749 struct elf_s390_dyn_relocs *p;
1751 if (h->root.type == bfd_link_hash_indirect)
1754 if (h->root.type == bfd_link_hash_warning)
1755 /* When warning symbols are created, they **replace** the "real"
1756 entry in the hash table, thus we never get to see the real
1757 symbol in a hash traversal. So look at it now. */
1758 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1760 info = (struct bfd_link_info *) inf;
1761 htab = elf_s390_hash_table (info);
1763 if (htab->elf.dynamic_sections_created
1764 && h->plt.refcount > 0
1765 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1766 || h->root.type != bfd_link_hash_undefweak))
1768 /* Make sure this symbol is output as a dynamic symbol.
1769 Undefined weak syms won't yet be marked as dynamic. */
1770 if (h->dynindx == -1
1771 && !h->forced_local)
1773 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1778 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1780 asection *s = htab->splt;
1782 /* If this is the first .plt entry, make room for the special
1785 s->size += PLT_FIRST_ENTRY_SIZE;
1787 h->plt.offset = s->size;
1789 /* If this symbol is not defined in a regular file, and we are
1790 not generating a shared library, then set the symbol to this
1791 location in the .plt. This is required to make function
1792 pointers compare as equal between the normal executable and
1793 the shared library. */
1797 h->root.u.def.section = s;
1798 h->root.u.def.value = h->plt.offset;
1801 /* Make room for this entry. */
1802 s->size += PLT_ENTRY_SIZE;
1804 /* We also need to make an entry in the .got.plt section, which
1805 will be placed in the .got section by the linker script. */
1806 htab->sgotplt->size += GOT_ENTRY_SIZE;
1808 /* We also need to make an entry in the .rela.plt section. */
1809 htab->srelplt->size += sizeof (Elf32_External_Rela);
1813 h->plt.offset = (bfd_vma) -1;
1815 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1820 h->plt.offset = (bfd_vma) -1;
1822 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1825 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1826 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1827 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1828 we can save the dynamic TLS relocation. */
1829 if (h->got.refcount > 0
1832 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1834 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1835 /* For the GOTIE access without a literal pool entry the offset has
1836 to be stored somewhere. The immediate value in the instruction
1837 is not bit enough so the value is stored in the got. */
1839 h->got.offset = htab->sgot->size;
1840 htab->sgot->size += GOT_ENTRY_SIZE;
1843 h->got.offset = (bfd_vma) -1;
1845 else if (h->got.refcount > 0)
1849 int tls_type = elf_s390_hash_entry(h)->tls_type;
1851 /* Make sure this symbol is output as a dynamic symbol.
1852 Undefined weak syms won't yet be marked as dynamic. */
1853 if (h->dynindx == -1
1854 && !h->forced_local)
1856 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1861 h->got.offset = s->size;
1862 s->size += GOT_ENTRY_SIZE;
1863 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1864 if (tls_type == GOT_TLS_GD)
1865 s->size += GOT_ENTRY_SIZE;
1866 dyn = htab->elf.dynamic_sections_created;
1867 /* R_390_TLS_IE32 needs one dynamic relocation,
1868 R_390_TLS_GD32 needs one if local symbol and two if global. */
1869 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1870 || tls_type >= GOT_TLS_IE)
1871 htab->srelgot->size += sizeof (Elf32_External_Rela);
1872 else if (tls_type == GOT_TLS_GD)
1873 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1874 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1875 || h->root.type != bfd_link_hash_undefweak)
1877 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1878 htab->srelgot->size += sizeof (Elf32_External_Rela);
1881 h->got.offset = (bfd_vma) -1;
1883 eh = (struct elf_s390_link_hash_entry *) h;
1884 if (eh->dyn_relocs == NULL)
1887 /* In the shared -Bsymbolic case, discard space allocated for
1888 dynamic pc-relative relocs against symbols which turn out to be
1889 defined in regular objects. For the normal shared case, discard
1890 space for pc-relative relocs that have become local due to symbol
1891 visibility changes. */
1895 if (SYMBOL_REFERENCES_LOCAL (info, h))
1897 struct elf_s390_dyn_relocs **pp;
1899 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1901 p->count -= p->pc_count;
1910 /* Also discard relocs on undefined weak syms with non-default
1912 if (eh->dyn_relocs != NULL
1913 && h->root.type == bfd_link_hash_undefweak)
1915 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1916 eh->dyn_relocs = NULL;
1918 /* Make sure undefined weak symbols are output as a dynamic
1920 else if (h->dynindx == -1
1921 && !h->forced_local)
1923 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1928 else if (ELIMINATE_COPY_RELOCS)
1930 /* For the non-shared case, discard space for relocs against
1931 symbols which turn out to need copy relocs or are not
1937 || (htab->elf.dynamic_sections_created
1938 && (h->root.type == bfd_link_hash_undefweak
1939 || h->root.type == bfd_link_hash_undefined))))
1941 /* Make sure this symbol is output as a dynamic symbol.
1942 Undefined weak syms won't yet be marked as dynamic. */
1943 if (h->dynindx == -1
1944 && !h->forced_local)
1946 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1950 /* If that succeeded, we know we'll be keeping all the
1952 if (h->dynindx != -1)
1956 eh->dyn_relocs = NULL;
1961 /* Finally, allocate space. */
1962 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1964 asection *sreloc = elf_section_data (p->sec)->sreloc;
1966 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1972 /* Find any dynamic relocs that apply to read-only sections. */
1975 readonly_dynrelocs (h, inf)
1976 struct elf_link_hash_entry *h;
1979 struct elf_s390_link_hash_entry *eh;
1980 struct elf_s390_dyn_relocs *p;
1982 if (h->root.type == bfd_link_hash_warning)
1983 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1985 eh = (struct elf_s390_link_hash_entry *) h;
1986 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1988 asection *s = p->sec->output_section;
1990 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1992 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1994 info->flags |= DF_TEXTREL;
1996 /* Not an error, just cut short the traversal. */
2003 /* Set the sizes of the dynamic sections. */
2006 elf_s390_size_dynamic_sections (output_bfd, info)
2007 bfd *output_bfd ATTRIBUTE_UNUSED;
2008 struct bfd_link_info *info;
2010 struct elf_s390_link_hash_table *htab;
2016 htab = elf_s390_hash_table (info);
2017 dynobj = htab->elf.dynobj;
2021 if (htab->elf.dynamic_sections_created)
2023 /* Set the contents of the .interp section to the interpreter. */
2024 if (info->executable)
2026 s = bfd_get_section_by_name (dynobj, ".interp");
2029 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2030 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2034 /* Set up .got offsets for local syms, and space for local dynamic
2036 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2038 bfd_signed_vma *local_got;
2039 bfd_signed_vma *end_local_got;
2040 char *local_tls_type;
2041 bfd_size_type locsymcount;
2042 Elf_Internal_Shdr *symtab_hdr;
2045 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2048 for (s = ibfd->sections; s != NULL; s = s->next)
2050 struct elf_s390_dyn_relocs *p;
2052 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2054 if (!bfd_is_abs_section (p->sec)
2055 && bfd_is_abs_section (p->sec->output_section))
2057 /* Input section has been discarded, either because
2058 it is a copy of a linkonce section or due to
2059 linker script /DISCARD/, so we'll be discarding
2062 else if (p->count != 0)
2064 srela = elf_section_data (p->sec)->sreloc;
2065 srela->size += p->count * sizeof (Elf32_External_Rela);
2066 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2067 info->flags |= DF_TEXTREL;
2072 local_got = elf_local_got_refcounts (ibfd);
2076 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2077 locsymcount = symtab_hdr->sh_info;
2078 end_local_got = local_got + locsymcount;
2079 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2081 srela = htab->srelgot;
2082 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2086 *local_got = s->size;
2087 s->size += GOT_ENTRY_SIZE;
2088 if (*local_tls_type == GOT_TLS_GD)
2089 s->size += GOT_ENTRY_SIZE;
2091 srela->size += sizeof (Elf32_External_Rela);
2094 *local_got = (bfd_vma) -1;
2098 if (htab->tls_ldm_got.refcount > 0)
2100 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2102 htab->tls_ldm_got.offset = htab->sgot->size;
2103 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2104 htab->srelgot->size += sizeof (Elf32_External_Rela);
2107 htab->tls_ldm_got.offset = -1;
2109 /* Allocate global sym .plt and .got entries, and space for global
2110 sym dynamic relocs. */
2111 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2113 /* We now have determined the sizes of the various dynamic sections.
2114 Allocate memory for them. */
2116 for (s = dynobj->sections; s != NULL; s = s->next)
2118 if ((s->flags & SEC_LINKER_CREATED) == 0)
2123 || s == htab->sgotplt
2124 || s == htab->sdynbss)
2126 /* Strip this section if we don't need it; see the
2129 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2134 /* We use the reloc_count field as a counter if we need
2135 to copy relocs into the output file. */
2140 /* It's not one of our sections, so don't allocate space. */
2146 /* If we don't need this section, strip it from the
2147 output file. This is to handle .rela.bss and
2148 .rela.plt. We must create it in
2149 create_dynamic_sections, because it must be created
2150 before the linker maps input sections to output
2151 sections. The linker does that before
2152 adjust_dynamic_symbol is called, and it is that
2153 function which decides whether anything needs to go
2154 into these sections. */
2156 s->flags |= SEC_EXCLUDE;
2160 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2163 /* Allocate memory for the section contents. We use bfd_zalloc
2164 here in case unused entries are not reclaimed before the
2165 section's contents are written out. This should not happen,
2166 but this way if it does, we get a R_390_NONE reloc instead
2168 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2169 if (s->contents == NULL)
2173 if (htab->elf.dynamic_sections_created)
2175 /* Add some entries to the .dynamic section. We fill in the
2176 values later, in elf_s390_finish_dynamic_sections, but we
2177 must add the entries now so that we get the correct size for
2178 the .dynamic section. The DT_DEBUG entry is filled in by the
2179 dynamic linker and used by the debugger. */
2180 #define add_dynamic_entry(TAG, VAL) \
2181 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2183 if (info->executable)
2185 if (!add_dynamic_entry (DT_DEBUG, 0))
2189 if (htab->splt->size != 0)
2191 if (!add_dynamic_entry (DT_PLTGOT, 0)
2192 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2193 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2194 || !add_dynamic_entry (DT_JMPREL, 0))
2200 if (!add_dynamic_entry (DT_RELA, 0)
2201 || !add_dynamic_entry (DT_RELASZ, 0)
2202 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2205 /* If any dynamic relocs apply to a read-only section,
2206 then we need a DT_TEXTREL entry. */
2207 if ((info->flags & DF_TEXTREL) == 0)
2208 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2211 if ((info->flags & DF_TEXTREL) != 0)
2213 if (!add_dynamic_entry (DT_TEXTREL, 0))
2218 #undef add_dynamic_entry
2223 /* Return the base VMA address which should be subtracted from real addresses
2224 when resolving @dtpoff relocation.
2225 This is PT_TLS segment p_vaddr. */
2229 struct bfd_link_info *info;
2231 /* If tls_sec is NULL, we should have signalled an error already. */
2232 if (elf_hash_table (info)->tls_sec == NULL)
2234 return elf_hash_table (info)->tls_sec->vma;
2237 /* Return the relocation value for @tpoff relocation
2238 if STT_TLS virtual address is ADDRESS. */
2241 tpoff (info, address)
2242 struct bfd_link_info *info;
2245 struct elf_link_hash_table *htab = elf_hash_table (info);
2247 /* If tls_sec is NULL, we should have signalled an error already. */
2248 if (htab->tls_sec == NULL)
2250 return htab->tls_size + htab->tls_sec->vma - address;
2253 /* Complain if TLS instruction relocation is against an invalid
2257 invalid_tls_insn (input_bfd, input_section, rel)
2259 asection *input_section;
2260 Elf_Internal_Rela *rel;
2262 reloc_howto_type *howto;
2264 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2265 (*_bfd_error_handler)
2266 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2269 (long) rel->r_offset,
2271 bfd_set_error (bfd_error_bad_value);
2274 /* Relocate a 390 ELF section. */
2277 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2278 contents, relocs, local_syms, local_sections)
2280 struct bfd_link_info *info;
2282 asection *input_section;
2284 Elf_Internal_Rela *relocs;
2285 Elf_Internal_Sym *local_syms;
2286 asection **local_sections;
2288 struct elf_s390_link_hash_table *htab;
2289 Elf_Internal_Shdr *symtab_hdr;
2290 struct elf_link_hash_entry **sym_hashes;
2291 bfd_vma *local_got_offsets;
2292 Elf_Internal_Rela *rel;
2293 Elf_Internal_Rela *relend;
2295 if (info->relocatable)
2298 htab = elf_s390_hash_table (info);
2299 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2300 sym_hashes = elf_sym_hashes (input_bfd);
2301 local_got_offsets = elf_local_got_offsets (input_bfd);
2304 relend = relocs + input_section->reloc_count;
2305 for (; rel < relend; rel++)
2307 unsigned int r_type;
2308 reloc_howto_type *howto;
2309 unsigned long r_symndx;
2310 struct elf_link_hash_entry *h;
2311 Elf_Internal_Sym *sym;
2315 bfd_boolean unresolved_reloc;
2316 bfd_reloc_status_type r;
2319 r_type = ELF32_R_TYPE (rel->r_info);
2320 if (r_type == (int) R_390_GNU_VTINHERIT
2321 || r_type == (int) R_390_GNU_VTENTRY)
2323 if (r_type >= (int) R_390_max)
2325 bfd_set_error (bfd_error_bad_value);
2329 howto = elf_howto_table + r_type;
2330 r_symndx = ELF32_R_SYM (rel->r_info);
2332 /* This is a final link. */
2336 unresolved_reloc = FALSE;
2337 if (r_symndx < symtab_hdr->sh_info)
2339 sym = local_syms + r_symndx;
2340 sec = local_sections[r_symndx];
2341 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2345 bfd_boolean warned ATTRIBUTE_UNUSED;
2347 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2348 r_symndx, symtab_hdr, sym_hashes,
2350 unresolved_reloc, warned);
2355 case R_390_GOTPLT12:
2356 case R_390_GOTPLT16:
2357 case R_390_GOTPLT20:
2358 case R_390_GOTPLT32:
2359 case R_390_GOTPLTENT:
2360 /* There are three cases for a GOTPLT relocation. 1) The
2361 relocation is against the jump slot entry of a plt that
2362 will get emitted to the output file. 2) The relocation
2363 is against the jump slot of a plt entry that has been
2364 removed. elf_s390_adjust_gotplt has created a GOT entry
2365 as replacement. 3) The relocation is against a local symbol.
2366 Cases 2) and 3) are the same as the GOT relocation code
2367 so we just have to test for case 1 and fall through for
2369 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2374 Current offset - size first entry / entry size. */
2375 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2378 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2380 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2381 unresolved_reloc = FALSE;
2383 if (r_type == R_390_GOTPLTENT)
2384 relocation += htab->sgot->output_section->vma;
2394 /* Relocation is to the entry for this symbol in the global
2396 if (htab->sgot == NULL)
2403 off = h->got.offset;
2404 dyn = htab->elf.dynamic_sections_created;
2405 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2411 || (ELF_ST_VISIBILITY (h->other)
2412 && h->root.type == bfd_link_hash_undefweak))
2414 /* This is actually a static link, or it is a
2415 -Bsymbolic link and the symbol is defined
2416 locally, or the symbol was forced to be local
2417 because of a version file. We must initialize
2418 this entry in the global offset table. Since the
2419 offset must always be a multiple of 2, we use the
2420 least significant bit to record whether we have
2421 initialized it already.
2423 When doing a dynamic link, we create a .rel.got
2424 relocation entry to initialize the value. This
2425 is done in the finish_dynamic_symbol routine. */
2430 bfd_put_32 (output_bfd, relocation,
2431 htab->sgot->contents + off);
2436 unresolved_reloc = FALSE;
2440 if (local_got_offsets == NULL)
2443 off = local_got_offsets[r_symndx];
2445 /* The offset must always be a multiple of 4. We use
2446 the least significant bit to record whether we have
2447 already generated the necessary reloc. */
2452 bfd_put_32 (output_bfd, relocation,
2453 htab->sgot->contents + off);
2458 Elf_Internal_Rela outrel;
2461 srelgot = htab->srelgot;
2462 if (srelgot == NULL)
2465 outrel.r_offset = (htab->sgot->output_section->vma
2466 + htab->sgot->output_offset
2468 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2469 outrel.r_addend = relocation;
2470 loc = srelgot->contents;
2471 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2472 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2475 local_got_offsets[r_symndx] |= 1;
2479 if (off >= (bfd_vma) -2)
2482 relocation = htab->sgot->output_offset + off;
2484 /* For @GOTENT the relocation is against the offset between
2485 the instruction and the symbols entry in the GOT and not
2486 between the start of the GOT and the symbols entry. We
2487 add the vma of the GOT to get the correct value. */
2488 if ( r_type == R_390_GOTENT
2489 || r_type == R_390_GOTPLTENT)
2490 relocation += htab->sgot->output_section->vma;
2494 case R_390_GOTOFF16:
2495 case R_390_GOTOFF32:
2496 /* Relocation is relative to the start of the global offset
2499 /* Note that sgot->output_offset is not involved in this
2500 calculation. We always want the start of .got. If we
2501 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2502 permitted by the ABI, we might have to change this
2504 relocation -= htab->sgot->output_section->vma;
2508 case R_390_GOTPCDBL:
2509 /* Use global offset table as symbol value. */
2510 relocation = htab->sgot->output_section->vma;
2511 unresolved_reloc = FALSE;
2514 case R_390_PLT16DBL:
2515 case R_390_PLT32DBL:
2517 /* Relocation is to the entry for this symbol in the
2518 procedure linkage table. */
2520 /* Resolve a PLT32 reloc against a local symbol directly,
2521 without using the procedure linkage table. */
2525 if (h->plt.offset == (bfd_vma) -1
2526 || htab->splt == NULL)
2528 /* We didn't make a PLT entry for this symbol. This
2529 happens when statically linking PIC code, or when
2530 using -Bsymbolic. */
2534 relocation = (htab->splt->output_section->vma
2535 + htab->splt->output_offset
2537 unresolved_reloc = FALSE;
2540 case R_390_PLTOFF16:
2541 case R_390_PLTOFF32:
2542 /* Relocation is to the entry for this symbol in the
2543 procedure linkage table relative to the start of the GOT. */
2545 /* For local symbols or if we didn't make a PLT entry for
2546 this symbol resolve the symbol directly. */
2548 || h->plt.offset == (bfd_vma) -1
2549 || htab->splt == NULL)
2551 relocation -= htab->sgot->output_section->vma;
2555 relocation = (htab->splt->output_section->vma
2556 + htab->splt->output_offset
2558 - htab->sgot->output_section->vma);
2559 unresolved_reloc = FALSE;
2569 /* r_symndx will be zero only for relocs against symbols
2570 from removed linkonce sections, or sections discarded by
2573 || (input_section->flags & SEC_ALLOC) == 0)
2578 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2579 || h->root.type != bfd_link_hash_undefweak)
2580 && ((r_type != R_390_PC16
2581 && r_type != R_390_PC16DBL
2582 && r_type != R_390_PC32DBL
2583 && r_type != R_390_PC32)
2585 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2586 || (ELIMINATE_COPY_RELOCS
2593 || h->root.type == bfd_link_hash_undefweak
2594 || h->root.type == bfd_link_hash_undefined)))
2596 Elf_Internal_Rela outrel;
2597 bfd_boolean skip, relocate;
2601 /* When generating a shared object, these relocations
2602 are copied into the output file to be resolved at run
2609 _bfd_elf_section_offset (output_bfd, info, input_section,
2611 if (outrel.r_offset == (bfd_vma) -1)
2613 else if (outrel.r_offset == (bfd_vma) -2)
2614 skip = TRUE, relocate = TRUE;
2615 outrel.r_offset += (input_section->output_section->vma
2616 + input_section->output_offset);
2619 memset (&outrel, 0, sizeof outrel);
2622 && (r_type == R_390_PC16
2623 || r_type == R_390_PC16DBL
2624 || r_type == R_390_PC32DBL
2625 || r_type == R_390_PC32
2628 || !h->def_regular))
2630 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2631 outrel.r_addend = rel->r_addend;
2635 /* This symbol is local, or marked to become local. */
2636 outrel.r_addend = relocation + rel->r_addend;
2637 if (r_type == R_390_32)
2640 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2646 if (bfd_is_abs_section (sec))
2648 else if (sec == NULL || sec->owner == NULL)
2650 bfd_set_error(bfd_error_bad_value);
2657 osec = sec->output_section;
2658 sindx = elf_section_data (osec)->dynindx;
2659 BFD_ASSERT (sindx > 0);
2661 /* We are turning this relocation into one
2662 against a section symbol, so subtract out
2663 the output section's address but not the
2664 offset of the input section in the output
2667 outrel.r_addend -= osec->vma;
2669 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2673 sreloc = elf_section_data (input_section)->sreloc;
2677 loc = sreloc->contents;
2678 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2679 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2681 /* If this reloc is against an external symbol, we do
2682 not want to fiddle with the addend. Otherwise, we
2683 need to include the symbol value so that it becomes
2684 an addend for the dynamic reloc. */
2690 /* Relocations for tls literal pool entries. */
2691 case R_390_TLS_IE32:
2694 Elf_Internal_Rela outrel;
2698 outrel.r_offset = rel->r_offset
2699 + input_section->output_section->vma
2700 + input_section->output_offset;
2701 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2702 sreloc = elf_section_data (input_section)->sreloc;
2705 loc = sreloc->contents;
2706 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2707 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2711 case R_390_TLS_GD32:
2712 case R_390_TLS_GOTIE32:
2713 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2714 tls_type = GOT_UNKNOWN;
2715 if (h == NULL && local_got_offsets)
2716 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2719 tls_type = elf_s390_hash_entry(h)->tls_type;
2720 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2721 r_type = R_390_TLS_LE32;
2723 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2724 r_type = R_390_TLS_IE32;
2726 if (r_type == R_390_TLS_LE32)
2728 /* This relocation gets optimized away by the local exec
2729 access optimization. */
2730 BFD_ASSERT (! unresolved_reloc);
2731 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2732 contents + rel->r_offset);
2736 if (htab->sgot == NULL)
2740 off = h->got.offset;
2743 if (local_got_offsets == NULL)
2746 off = local_got_offsets[r_symndx];
2755 Elf_Internal_Rela outrel;
2759 if (htab->srelgot == NULL)
2762 outrel.r_offset = (htab->sgot->output_section->vma
2763 + htab->sgot->output_offset + off);
2765 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2766 if (r_type == R_390_TLS_GD32)
2767 dr_type = R_390_TLS_DTPMOD;
2769 dr_type = R_390_TLS_TPOFF;
2770 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2771 outrel.r_addend = relocation - dtpoff_base (info);
2773 outrel.r_addend = 0;
2774 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2775 loc = htab->srelgot->contents;
2776 loc += htab->srelgot->reloc_count++
2777 * sizeof (Elf32_External_Rela);
2778 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2780 if (r_type == R_390_TLS_GD32)
2784 BFD_ASSERT (! unresolved_reloc);
2785 bfd_put_32 (output_bfd,
2786 relocation - dtpoff_base (info),
2787 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2791 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2792 outrel.r_offset += GOT_ENTRY_SIZE;
2793 outrel.r_addend = 0;
2794 htab->srelgot->reloc_count++;
2795 loc += sizeof (Elf32_External_Rela);
2796 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2803 local_got_offsets[r_symndx] |= 1;
2806 if (off >= (bfd_vma) -2)
2808 if (r_type == ELF32_R_TYPE (rel->r_info))
2810 relocation = htab->sgot->output_offset + off;
2811 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2812 relocation += htab->sgot->output_section->vma;
2813 unresolved_reloc = FALSE;
2817 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2818 contents + rel->r_offset);
2823 case R_390_TLS_GOTIE12:
2824 case R_390_TLS_GOTIE20:
2825 case R_390_TLS_IEENT:
2828 if (local_got_offsets == NULL)
2830 off = local_got_offsets[r_symndx];
2832 goto emit_tls_relocs;
2836 off = h->got.offset;
2837 tls_type = elf_s390_hash_entry(h)->tls_type;
2838 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2839 goto emit_tls_relocs;
2842 if (htab->sgot == NULL)
2845 BFD_ASSERT (! unresolved_reloc);
2846 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2847 htab->sgot->contents + off);
2848 relocation = htab->sgot->output_offset + off;
2849 if (r_type == R_390_TLS_IEENT)
2850 relocation += htab->sgot->output_section->vma;
2851 unresolved_reloc = FALSE;
2854 case R_390_TLS_LDM32:
2856 /* The literal pool entry this relocation refers to gets ignored
2857 by the optimized code of the local exec model. Do nothing
2858 and the value will turn out zero. */
2861 if (htab->sgot == NULL)
2864 off = htab->tls_ldm_got.offset;
2869 Elf_Internal_Rela outrel;
2872 if (htab->srelgot == NULL)
2875 outrel.r_offset = (htab->sgot->output_section->vma
2876 + htab->sgot->output_offset + off);
2878 bfd_put_32 (output_bfd, 0,
2879 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2880 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2881 outrel.r_addend = 0;
2882 loc = htab->srelgot->contents;
2883 loc += htab->srelgot->reloc_count++
2884 * sizeof (Elf32_External_Rela);
2885 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2886 htab->tls_ldm_got.offset |= 1;
2888 relocation = htab->sgot->output_offset + off;
2889 unresolved_reloc = FALSE;
2892 case R_390_TLS_LE32:
2895 /* Linking a shared library with non-fpic code requires
2896 a R_390_TLS_TPOFF relocation. */
2897 Elf_Internal_Rela outrel;
2902 outrel.r_offset = rel->r_offset
2903 + input_section->output_section->vma
2904 + input_section->output_offset;
2905 if (h != NULL && h->dynindx != -1)
2909 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2911 outrel.r_addend = relocation - dtpoff_base (info);
2913 outrel.r_addend = 0;
2914 sreloc = elf_section_data (input_section)->sreloc;
2917 loc = sreloc->contents;
2918 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2919 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2923 BFD_ASSERT (! unresolved_reloc);
2924 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2925 contents + rel->r_offset);
2929 case R_390_TLS_LDO32:
2930 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2931 relocation -= dtpoff_base (info);
2933 /* When converting LDO to LE, we must negate. */
2934 relocation = -tpoff (info, relocation);
2937 /* Relocations for tls instructions. */
2938 case R_390_TLS_LOAD:
2939 case R_390_TLS_GDCALL:
2940 case R_390_TLS_LDCALL:
2941 tls_type = GOT_UNKNOWN;
2942 if (h == NULL && local_got_offsets)
2943 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2945 tls_type = elf_s390_hash_entry(h)->tls_type;
2947 if (tls_type == GOT_TLS_GD)
2950 if (r_type == R_390_TLS_LOAD)
2952 if (!info->shared && (h == NULL || h->dynindx == -1))
2954 /* IE->LE transition. Four valid cases:
2955 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2956 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2957 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2958 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2959 unsigned int insn, ry;
2961 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2963 if ((insn & 0xff00f000) == 0x58000000)
2964 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2965 ry = (insn & 0x000f0000);
2966 else if ((insn & 0xff0f0000) == 0x58000000)
2967 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2968 ry = (insn & 0x0000f000) << 4;
2969 else if ((insn & 0xff00f000) == 0x5800c000)
2970 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2971 ry = (insn & 0x000f0000);
2972 else if ((insn & 0xff0f0000) == 0x580c0000)
2973 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2974 ry = (insn & 0x0000f000) << 4;
2976 invalid_tls_insn (input_bfd, input_section, rel);
2977 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2978 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2981 else if (r_type == R_390_TLS_GDCALL)
2985 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2986 if ((insn & 0xff000fff) != 0x4d000000 &&
2987 (insn & 0xffff0000) != 0xc0e50000)
2988 invalid_tls_insn (input_bfd, input_section, rel);
2989 if (!info->shared && (h == NULL || h->dynindx == -1))
2991 if ((insn & 0xff000000) == 0x4d000000)
2993 /* GD->LE transition.
2994 bas %r14,0(%rx,%r13) -> bc 0,0 */
2999 /* GD->LE transition.
3000 brasl %r14,_tls_get_addr@plt -> brcl 0,. */
3002 bfd_put_16 (output_bfd, 0x0000,
3003 contents + rel->r_offset + 4);
3008 if ((insn & 0xff000000) == 0x4d000000)
3010 /* GD->IE transition.
3011 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3016 /* GD->IE transition.
3017 brasl %r14,__tls_get_addr@plt ->
3018 l %r2,0(%r2,%r12) ; bcr 0,0 */
3020 bfd_put_16 (output_bfd, 0x0700,
3021 contents + rel->r_offset + 4);
3024 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3026 else if (r_type == R_390_TLS_LDCALL)
3032 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3033 if ((insn & 0xff000fff) != 0x4d000000 &&
3034 (insn & 0xffff0000) != 0xc0e50000)
3035 invalid_tls_insn (input_bfd, input_section, rel);
3036 if ((insn & 0xff000000) == 0x4d000000)
3038 /* LD->LE transition.
3039 bas %r14,0(%rx,%r13) -> bc 0,0 */
3044 /* LD->LE transition.
3045 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3047 bfd_put_16 (output_bfd, 0x0000,
3048 contents + rel->r_offset + 4);
3050 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3059 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3060 because such sections are not SEC_ALLOC and thus ld.so will
3061 not process them. */
3062 if (unresolved_reloc
3063 && !((input_section->flags & SEC_DEBUGGING) != 0
3065 (*_bfd_error_handler)
3066 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3069 (long) rel->r_offset,
3071 h->root.root.string);
3073 if (r_type == R_390_20
3074 || r_type == R_390_GOT20
3075 || r_type == R_390_GOTPLT20
3076 || r_type == R_390_TLS_GOTIE20)
3078 relocation += rel->r_addend;
3079 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3080 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3081 contents, rel->r_offset,
3085 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3086 contents, rel->r_offset,
3087 relocation, rel->r_addend);
3089 if (r != bfd_reloc_ok)
3094 name = h->root.root.string;
3097 name = bfd_elf_string_from_elf_section (input_bfd,
3098 symtab_hdr->sh_link,
3103 name = bfd_section_name (input_bfd, sec);
3106 if (r == bfd_reloc_overflow)
3109 if (! ((*info->callbacks->reloc_overflow)
3110 (info, (h ? &h->root : NULL), name, howto->name,
3111 (bfd_vma) 0, input_bfd, input_section,
3117 (*_bfd_error_handler)
3118 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3119 input_bfd, input_section,
3120 (long) rel->r_offset, name, (int) r);
3129 /* Finish up dynamic symbol handling. We set the contents of various
3130 dynamic sections here. */
3133 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3135 struct bfd_link_info *info;
3136 struct elf_link_hash_entry *h;
3137 Elf_Internal_Sym *sym;
3139 struct elf_s390_link_hash_table *htab;
3141 htab = elf_s390_hash_table (info);
3143 if (h->plt.offset != (bfd_vma) -1)
3147 Elf_Internal_Rela rela;
3149 bfd_vma relative_offset;
3151 /* This symbol has an entry in the procedure linkage table. Set
3153 if (h->dynindx == -1
3154 || htab->splt == NULL
3155 || htab->sgotplt == NULL
3156 || htab->srelplt == NULL)
3160 Current offset - size first entry / entry size. */
3161 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3163 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3165 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3167 /* S390 uses halfwords for relative branch calc! */
3168 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3169 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3170 /* If offset is > 32768, branch to a previous branch
3171 390 can only handle +-64 K jumps. */
3172 if ( -32768 > (int) relative_offset )
3174 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3176 /* Fill in the entry in the procedure linkage table. */
3179 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3180 htab->splt->contents + h->plt.offset);
3181 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3182 htab->splt->contents + h->plt.offset + 4);
3183 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3184 htab->splt->contents + h->plt.offset + 8);
3185 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3186 htab->splt->contents + h->plt.offset + 12);
3187 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3188 htab->splt->contents + h->plt.offset + 16);
3189 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3190 htab->splt->contents + h->plt.offset + 20);
3191 bfd_put_32 (output_bfd,
3192 (htab->sgotplt->output_section->vma
3193 + htab->sgotplt->output_offset
3195 htab->splt->contents + h->plt.offset + 24);
3197 else if (got_offset < 4096)
3199 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3200 htab->splt->contents + h->plt.offset);
3201 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3202 htab->splt->contents + h->plt.offset + 4);
3203 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3204 htab->splt->contents + h->plt.offset + 8);
3205 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3206 htab->splt->contents + h->plt.offset + 12);
3207 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3208 htab->splt->contents + h->plt.offset + 16);
3209 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3210 htab->splt->contents + h->plt.offset + 20);
3211 bfd_put_32 (output_bfd, (bfd_vma) 0,
3212 htab->splt->contents + h->plt.offset + 24);
3214 else if (got_offset < 32768)
3216 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3217 htab->splt->contents + h->plt.offset);
3218 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3219 htab->splt->contents + h->plt.offset + 4);
3220 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3221 htab->splt->contents + h->plt.offset + 8);
3222 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3223 htab->splt->contents + h->plt.offset + 12);
3224 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3225 htab->splt->contents + h->plt.offset + 16);
3226 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3227 htab->splt->contents + h->plt.offset + 20);
3228 bfd_put_32 (output_bfd, (bfd_vma) 0,
3229 htab->splt->contents + h->plt.offset + 24);
3233 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3234 htab->splt->contents + h->plt.offset);
3235 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3236 htab->splt->contents + h->plt.offset + 4);
3237 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3238 htab->splt->contents + h->plt.offset + 8);
3239 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3240 htab->splt->contents + h->plt.offset + 12);
3241 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3242 htab->splt->contents + h->plt.offset + 16);
3243 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3244 htab->splt->contents + h->plt.offset + 20);
3245 bfd_put_32 (output_bfd, got_offset,
3246 htab->splt->contents + h->plt.offset + 24);
3248 /* Insert offset into reloc. table here. */
3249 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3250 htab->splt->contents + h->plt.offset + 28);
3252 /* Fill in the entry in the global offset table.
3253 Points to instruction after GOT offset. */
3254 bfd_put_32 (output_bfd,
3255 (htab->splt->output_section->vma
3256 + htab->splt->output_offset
3259 htab->sgotplt->contents + got_offset);
3261 /* Fill in the entry in the .rela.plt section. */
3262 rela.r_offset = (htab->sgotplt->output_section->vma
3263 + htab->sgotplt->output_offset
3265 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3267 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3268 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3270 if (!h->def_regular)
3272 /* Mark the symbol as undefined, rather than as defined in
3273 the .plt section. Leave the value alone. This is a clue
3274 for the dynamic linker, to make function pointer
3275 comparisons work between an application and shared
3277 sym->st_shndx = SHN_UNDEF;
3281 if (h->got.offset != (bfd_vma) -1
3282 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3283 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3284 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3286 Elf_Internal_Rela rela;
3289 /* This symbol has an entry in the global offset table. Set it
3292 if (htab->sgot == NULL || htab->srelgot == NULL)
3295 rela.r_offset = (htab->sgot->output_section->vma
3296 + htab->sgot->output_offset
3297 + (h->got.offset &~ (bfd_vma) 1));
3299 /* If this is a static link, or it is a -Bsymbolic link and the
3300 symbol is defined locally or was forced to be local because
3301 of a version file, we just want to emit a RELATIVE reloc.
3302 The entry in the global offset table will already have been
3303 initialized in the relocate_section function. */
3310 BFD_ASSERT((h->got.offset & 1) != 0);
3311 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3312 rela.r_addend = (h->root.u.def.value
3313 + h->root.u.def.section->output_section->vma
3314 + h->root.u.def.section->output_offset);
3318 BFD_ASSERT((h->got.offset & 1) == 0);
3319 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3320 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3324 loc = htab->srelgot->contents;
3325 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3326 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3331 Elf_Internal_Rela rela;
3334 /* This symbols needs a copy reloc. Set it up. */
3336 if (h->dynindx == -1
3337 || (h->root.type != bfd_link_hash_defined
3338 && h->root.type != bfd_link_hash_defweak)
3339 || htab->srelbss == NULL)
3342 rela.r_offset = (h->root.u.def.value
3343 + h->root.u.def.section->output_section->vma
3344 + h->root.u.def.section->output_offset);
3345 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3347 loc = htab->srelbss->contents;
3348 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3349 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3352 /* Mark some specially defined symbols as absolute. */
3353 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3354 || h == htab->elf.hgot
3355 || h == htab->elf.hplt)
3356 sym->st_shndx = SHN_ABS;
3361 /* Used to decide how to sort relocs in an optimal manner for the
3362 dynamic linker, before writing them out. */
3364 static enum elf_reloc_type_class
3365 elf_s390_reloc_type_class (rela)
3366 const Elf_Internal_Rela *rela;
3368 switch ((int) ELF32_R_TYPE (rela->r_info))
3370 case R_390_RELATIVE:
3371 return reloc_class_relative;
3372 case R_390_JMP_SLOT:
3373 return reloc_class_plt;
3375 return reloc_class_copy;
3377 return reloc_class_normal;
3381 /* Finish up the dynamic sections. */
3384 elf_s390_finish_dynamic_sections (output_bfd, info)
3386 struct bfd_link_info *info;
3388 struct elf_s390_link_hash_table *htab;
3392 htab = elf_s390_hash_table (info);
3393 dynobj = htab->elf.dynobj;
3394 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3396 if (htab->elf.dynamic_sections_created)
3398 Elf32_External_Dyn *dyncon, *dynconend;
3400 if (sdyn == NULL || htab->sgot == NULL)
3403 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3404 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3405 for (; dyncon < dynconend; dyncon++)
3407 Elf_Internal_Dyn dyn;
3410 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3418 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3422 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3426 s = htab->srelplt->output_section;
3427 dyn.d_un.d_val = s->size;
3431 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3434 /* Fill in the special first entry in the procedure linkage table. */
3435 if (htab->splt && htab->splt->size > 0)
3437 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3440 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3441 htab->splt->contents );
3442 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3443 htab->splt->contents +4 );
3444 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3445 htab->splt->contents +8 );
3446 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3447 htab->splt->contents +12 );
3448 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3449 htab->splt->contents +16 );
3453 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3454 htab->splt->contents );
3455 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3456 htab->splt->contents +4 );
3457 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3458 htab->splt->contents +8 );
3459 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3460 htab->splt->contents +12 );
3461 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3462 htab->splt->contents +16 );
3463 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3464 htab->splt->contents +20 );
3465 bfd_put_32 (output_bfd,
3466 htab->sgotplt->output_section->vma
3467 + htab->sgotplt->output_offset,
3468 htab->splt->contents + 24);
3470 elf_section_data (htab->splt->output_section)
3471 ->this_hdr.sh_entsize = 4;
3478 /* Fill in the first three entries in the global offset table. */
3479 if (htab->sgotplt->size > 0)
3481 bfd_put_32 (output_bfd,
3482 (sdyn == NULL ? (bfd_vma) 0
3483 : sdyn->output_section->vma + sdyn->output_offset),
3484 htab->sgotplt->contents);
3485 /* One entry for shared object struct ptr. */
3486 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3487 /* One entry for _dl_runtime_resolve. */
3488 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3491 elf_section_data (htab->sgotplt->output_section)
3492 ->this_hdr.sh_entsize = 4;
3498 elf_s390_grok_prstatus (abfd, note)
3500 Elf_Internal_Note * note;
3505 switch (note->descsz)
3510 case 224: /* S/390 Linux. */
3512 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3515 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3523 /* Make a ".reg/999" section. */
3524 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3525 size, note->descpos + offset);
3528 /* Return address for Ith PLT stub in section PLT, for relocation REL
3529 or (bfd_vma) -1 if it should not be included. */
3532 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3533 const arelent *rel ATTRIBUTE_UNUSED)
3535 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3539 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3540 #define TARGET_BIG_NAME "elf32-s390"
3541 #define ELF_ARCH bfd_arch_s390
3542 #define ELF_MACHINE_CODE EM_S390
3543 #define ELF_MACHINE_ALT1 EM_S390_OLD
3544 #define ELF_MAXPAGESIZE 0x1000
3546 #define elf_backend_can_gc_sections 1
3547 #define elf_backend_can_refcount 1
3548 #define elf_backend_want_got_plt 1
3549 #define elf_backend_plt_readonly 1
3550 #define elf_backend_want_plt_sym 0
3551 #define elf_backend_got_header_size 12
3552 #define elf_backend_rela_normal 1
3554 #define elf_info_to_howto elf_s390_info_to_howto
3556 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3557 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3558 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3560 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3561 #define elf_backend_check_relocs elf_s390_check_relocs
3562 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3563 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3564 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3565 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3566 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3567 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3568 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3569 #define elf_backend_relocate_section elf_s390_relocate_section
3570 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3571 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3572 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3573 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3575 #define bfd_elf32_mkobject elf_s390_mkobject
3576 #define elf_backend_object_p elf_s390_object_p
3578 #include "elf32-target.h"