1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 struct elf_s390_link_hash_entry;
50 static void elf_s390_adjust_gotplt
51 PARAMS ((struct elf_s390_link_hash_entry *));
52 static bfd_boolean elf_s390_adjust_dynamic_symbol
53 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
54 static bfd_boolean allocate_dynrelocs
55 PARAMS ((struct elf_link_hash_entry *, PTR));
56 static bfd_boolean readonly_dynrelocs
57 PARAMS ((struct elf_link_hash_entry *, PTR));
58 static bfd_boolean elf_s390_size_dynamic_sections
59 PARAMS ((bfd *, struct bfd_link_info *));
60 static bfd_boolean elf_s390_relocate_section
61 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
63 static bfd_boolean elf_s390_finish_dynamic_symbol
64 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
66 static enum elf_reloc_type_class elf_s390_reloc_type_class
67 PARAMS ((const Elf_Internal_Rela *));
68 static bfd_boolean elf_s390_finish_dynamic_sections
69 PARAMS ((bfd *, struct bfd_link_info *));
70 static bfd_boolean elf_s390_object_p
72 static bfd_boolean elf_s390_grok_prstatus
73 PARAMS ((bfd *, Elf_Internal_Note *));
74 static int elf_s390_tls_transition
75 PARAMS ((struct bfd_link_info *, int, int));
76 static bfd_reloc_status_type s390_tls_reloc
77 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
78 static bfd_vma dtpoff_base
79 PARAMS ((struct bfd_link_info *));
81 PARAMS ((struct bfd_link_info *, bfd_vma));
82 static void invalid_tls_insn
83 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
84 static bfd_reloc_status_type s390_elf_ldisp_reloc
85 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
89 /* The relocation "howto" table. */
91 static reloc_howto_type elf_howto_table[] =
93 HOWTO (R_390_NONE, /* type */
95 0, /* size (0 = byte, 1 = short, 2 = long) */
97 FALSE, /* pc_relative */
99 complain_overflow_dont, /* complain_on_overflow */
100 bfd_elf_generic_reloc, /* special_function */
101 "R_390_NONE", /* name */
102 FALSE, /* partial_inplace */
105 FALSE), /* pcrel_offset */
107 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
109 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
110 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
111 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
113 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
115 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
117 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
119 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
123 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
125 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
127 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
131 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
133 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
135 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
137 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
139 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
141 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
143 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
145 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
147 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
149 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
150 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
151 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
152 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
153 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
155 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
157 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
158 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
159 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
160 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
162 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
164 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
165 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
167 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
169 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
171 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
172 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
173 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
174 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
175 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
176 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
177 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
178 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
180 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
181 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
182 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
183 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
184 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
185 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
186 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
187 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
188 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
189 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
190 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
191 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
192 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
193 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
194 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
196 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
197 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
199 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
200 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
202 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
203 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
204 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
205 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
206 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
207 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
208 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
209 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
210 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
211 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
212 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
213 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
216 /* GNU extension to record C++ vtable hierarchy. */
217 static reloc_howto_type elf32_s390_vtinherit_howto =
218 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
219 static reloc_howto_type elf32_s390_vtentry_howto =
220 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);
222 static reloc_howto_type *
223 elf_s390_reloc_type_lookup (abfd, code)
224 bfd *abfd ATTRIBUTE_UNUSED;
225 bfd_reloc_code_real_type code;
230 return &elf_howto_table[(int) R_390_NONE];
232 return &elf_howto_table[(int) R_390_8];
233 case BFD_RELOC_390_12:
234 return &elf_howto_table[(int) R_390_12];
236 return &elf_howto_table[(int) R_390_16];
238 return &elf_howto_table[(int) R_390_32];
240 return &elf_howto_table[(int) R_390_32];
241 case BFD_RELOC_32_PCREL:
242 return &elf_howto_table[(int) R_390_PC32];
243 case BFD_RELOC_390_GOT12:
244 return &elf_howto_table[(int) R_390_GOT12];
245 case BFD_RELOC_32_GOT_PCREL:
246 return &elf_howto_table[(int) R_390_GOT32];
247 case BFD_RELOC_390_PLT32:
248 return &elf_howto_table[(int) R_390_PLT32];
249 case BFD_RELOC_390_COPY:
250 return &elf_howto_table[(int) R_390_COPY];
251 case BFD_RELOC_390_GLOB_DAT:
252 return &elf_howto_table[(int) R_390_GLOB_DAT];
253 case BFD_RELOC_390_JMP_SLOT:
254 return &elf_howto_table[(int) R_390_JMP_SLOT];
255 case BFD_RELOC_390_RELATIVE:
256 return &elf_howto_table[(int) R_390_RELATIVE];
257 case BFD_RELOC_32_GOTOFF:
258 return &elf_howto_table[(int) R_390_GOTOFF32];
259 case BFD_RELOC_390_GOTPC:
260 return &elf_howto_table[(int) R_390_GOTPC];
261 case BFD_RELOC_390_GOT16:
262 return &elf_howto_table[(int) R_390_GOT16];
263 case BFD_RELOC_16_PCREL:
264 return &elf_howto_table[(int) R_390_PC16];
265 case BFD_RELOC_390_PC16DBL:
266 return &elf_howto_table[(int) R_390_PC16DBL];
267 case BFD_RELOC_390_PLT16DBL:
268 return &elf_howto_table[(int) R_390_PLT16DBL];
269 case BFD_RELOC_390_PC32DBL:
270 return &elf_howto_table[(int) R_390_PC32DBL];
271 case BFD_RELOC_390_PLT32DBL:
272 return &elf_howto_table[(int) R_390_PLT32DBL];
273 case BFD_RELOC_390_GOTPCDBL:
274 return &elf_howto_table[(int) R_390_GOTPCDBL];
275 case BFD_RELOC_390_GOTENT:
276 return &elf_howto_table[(int) R_390_GOTENT];
277 case BFD_RELOC_16_GOTOFF:
278 return &elf_howto_table[(int) R_390_GOTOFF16];
279 case BFD_RELOC_390_GOTPLT12:
280 return &elf_howto_table[(int) R_390_GOTPLT12];
281 case BFD_RELOC_390_GOTPLT16:
282 return &elf_howto_table[(int) R_390_GOTPLT16];
283 case BFD_RELOC_390_GOTPLT32:
284 return &elf_howto_table[(int) R_390_GOTPLT32];
285 case BFD_RELOC_390_GOTPLTENT:
286 return &elf_howto_table[(int) R_390_GOTPLTENT];
287 case BFD_RELOC_390_PLTOFF16:
288 return &elf_howto_table[(int) R_390_PLTOFF16];
289 case BFD_RELOC_390_PLTOFF32:
290 return &elf_howto_table[(int) R_390_PLTOFF32];
291 case BFD_RELOC_390_TLS_LOAD:
292 return &elf_howto_table[(int) R_390_TLS_LOAD];
293 case BFD_RELOC_390_TLS_GDCALL:
294 return &elf_howto_table[(int) R_390_TLS_GDCALL];
295 case BFD_RELOC_390_TLS_LDCALL:
296 return &elf_howto_table[(int) R_390_TLS_LDCALL];
297 case BFD_RELOC_390_TLS_GD32:
298 return &elf_howto_table[(int) R_390_TLS_GD32];
299 case BFD_RELOC_390_TLS_GOTIE12:
300 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
301 case BFD_RELOC_390_TLS_GOTIE32:
302 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
303 case BFD_RELOC_390_TLS_LDM32:
304 return &elf_howto_table[(int) R_390_TLS_LDM32];
305 case BFD_RELOC_390_TLS_IE32:
306 return &elf_howto_table[(int) R_390_TLS_IE32];
307 case BFD_RELOC_390_TLS_IEENT:
308 return &elf_howto_table[(int) R_390_TLS_IEENT];
309 case BFD_RELOC_390_TLS_LE32:
310 return &elf_howto_table[(int) R_390_TLS_LE32];
311 case BFD_RELOC_390_TLS_LDO32:
312 return &elf_howto_table[(int) R_390_TLS_LDO32];
313 case BFD_RELOC_390_TLS_DTPMOD:
314 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
315 case BFD_RELOC_390_TLS_DTPOFF:
316 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
317 case BFD_RELOC_390_TLS_TPOFF:
318 return &elf_howto_table[(int) R_390_TLS_TPOFF];
319 case BFD_RELOC_390_20:
320 return &elf_howto_table[(int) R_390_20];
321 case BFD_RELOC_390_GOT20:
322 return &elf_howto_table[(int) R_390_GOT20];
323 case BFD_RELOC_390_GOTPLT20:
324 return &elf_howto_table[(int) R_390_GOTPLT20];
325 case BFD_RELOC_390_TLS_GOTIE20:
326 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
327 case BFD_RELOC_VTABLE_INHERIT:
328 return &elf32_s390_vtinherit_howto;
329 case BFD_RELOC_VTABLE_ENTRY:
330 return &elf32_s390_vtentry_howto;
337 static reloc_howto_type *
338 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
343 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
344 if (elf_howto_table[i].name != NULL
345 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
346 return &elf_howto_table[i];
348 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
349 return &elf32_s390_vtinherit_howto;
350 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
351 return &elf32_s390_vtentry_howto;
356 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
357 and elf32-s390.c has its own copy. */
360 elf_s390_info_to_howto (abfd, cache_ptr, dst)
361 bfd *abfd ATTRIBUTE_UNUSED;
363 Elf_Internal_Rela *dst;
365 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
368 case R_390_GNU_VTINHERIT:
369 cache_ptr->howto = &elf32_s390_vtinherit_howto;
372 case R_390_GNU_VTENTRY:
373 cache_ptr->howto = &elf32_s390_vtentry_howto;
377 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
379 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
383 cache_ptr->howto = &elf_howto_table[r_type];
387 /* A relocation function which doesn't do anything. */
388 static bfd_reloc_status_type
389 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
390 output_bfd, error_message)
391 bfd *abfd ATTRIBUTE_UNUSED;
392 arelent *reloc_entry;
393 asymbol *symbol ATTRIBUTE_UNUSED;
394 PTR data ATTRIBUTE_UNUSED;
395 asection *input_section;
397 char **error_message ATTRIBUTE_UNUSED;
400 reloc_entry->address += input_section->output_offset;
404 /* Handle the large displacement relocs. */
405 static bfd_reloc_status_type
406 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
407 output_bfd, error_message)
408 bfd *abfd ATTRIBUTE_UNUSED;
409 arelent *reloc_entry;
411 PTR data ATTRIBUTE_UNUSED;
412 asection *input_section;
414 char **error_message ATTRIBUTE_UNUSED;
416 reloc_howto_type *howto = reloc_entry->howto;
420 if (output_bfd != (bfd *) NULL
421 && (symbol->flags & BSF_SECTION_SYM) == 0
422 && (! howto->partial_inplace
423 || reloc_entry->addend == 0))
425 reloc_entry->address += input_section->output_offset;
429 if (output_bfd != NULL)
430 return bfd_reloc_continue;
432 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
433 return bfd_reloc_outofrange;
435 relocation = (symbol->value
436 + symbol->section->output_section->vma
437 + symbol->section->output_offset);
438 relocation += reloc_entry->addend;
439 if (howto->pc_relative)
441 relocation -= (input_section->output_section->vma
442 + input_section->output_offset);
443 relocation -= reloc_entry->address;
446 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
447 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
448 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
450 if ((bfd_signed_vma) relocation < - 0x80000
451 || (bfd_signed_vma) relocation > 0x7ffff)
452 return bfd_reloc_overflow;
458 elf_s390_is_local_label_name (abfd, name)
462 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
465 return _bfd_elf_is_local_label_name (abfd, name);
468 /* Functions for the 390 ELF linker. */
470 /* The name of the dynamic interpreter. This is put in the .interp
473 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
475 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
476 copying dynamic variables from a shared lib into an app's dynbss
477 section, and instead use a dynamic relocation to point into the
479 #define ELIMINATE_COPY_RELOCS 1
481 /* The size in bytes of the first entry in the procedure linkage table. */
482 #define PLT_FIRST_ENTRY_SIZE 32
483 /* The size in bytes of an entry in the procedure linkage table. */
484 #define PLT_ENTRY_SIZE 32
486 #define GOT_ENTRY_SIZE 4
488 /* The first three entries in a procedure linkage table are reserved,
489 and the initial contents are unimportant (we zero them out).
490 Subsequent entries look like this. See the SVR4 ABI 386
491 supplement to see how this works. */
493 /* For the s390, simple addr offset can only be 0 - 4096.
494 To use the full 2 GB address space, several instructions
495 are needed to load an address in a register and execute
496 a branch( or just saving the address)
498 Furthermore, only r 0 and 1 are free to use!!! */
500 /* The first 3 words in the GOT are then reserved.
501 Word 0 is the address of the dynamic table.
502 Word 1 is a pointer to a structure describing the object
503 Word 2 is used to point to the loader entry address.
505 The code for position independent PLT entries looks like this:
507 r12 holds addr of the current GOT at entry to the PLT
509 The GOT holds the address in the PLT to be executed.
510 The loader then gets:
511 24(15) = Pointer to the structure describing the object.
512 28(15) = Offset in symbol table
514 The loader must then find the module where the function is
515 and insert the address in the GOT.
517 Note: 390 can only address +- 64 K relative.
518 We check if offset > 65536, then make a relative branch -64xxx
519 back to a previous defined branch
521 PLT1: BASR 1,0 # 2 bytes
522 L 1,22(1) # 4 bytes Load offset in GOT in r 1
523 L 1,(1,12) # 4 bytes Load address from GOT in r1
524 BCR 15,1 # 2 bytes Jump to address
525 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
526 L 1,14(1) # 4 bytes Load offset in symol table in r1
527 BRC 15,-x # 4 bytes Jump to start of PLT
528 .word 0 # 2 bytes filler
529 .long ? # 4 bytes offset in GOT
530 .long ? # 4 bytes offset into symbol table
532 This was the general case. There are two additional, optimizes PLT
533 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
534 First the one for GOT offsets < 4096:
536 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
537 BCR 15,1 # 2 bytes Jump to address
538 .word 0,0,0 # 6 bytes filler
539 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
540 L 1,14(1) # 4 bytes Load offset in symbol table in r1
541 BRC 15,-x # 4 bytes Jump to start of PLT
542 .word 0,0,0 # 6 bytes filler
543 .long ? # 4 bytes offset into symbol table
545 Second the one for GOT offsets < 32768:
547 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
548 L 1,(1,12) # 4 bytes Load address from GOT to r1
549 BCR 15,1 # 2 bytes Jump to address
550 .word 0 # 2 bytes filler
551 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
552 L 1,14(1) # 4 bytes Load offset in symbol table in r1
553 BRC 15,-x # 4 bytes Jump to start of PLT
554 .word 0,0,0 # 6 bytes filler
555 .long ? # 4 bytes offset into symbol table
557 Total = 32 bytes per PLT entry
559 The code for static build PLT entries looks like this:
561 PLT1: BASR 1,0 # 2 bytes
562 L 1,22(1) # 4 bytes Load address of GOT entry
563 L 1,0(0,1) # 4 bytes Load address from GOT in r1
564 BCR 15,1 # 2 bytes Jump to address
565 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
566 L 1,14(1) # 4 bytes Load offset in symbol table in r1
567 BRC 15,-x # 4 bytes Jump to start of PLT
568 .word 0 # 2 bytes filler
569 .long ? # 4 bytes address of GOT entry
570 .long ? # 4 bytes offset into symbol table */
572 #define PLT_PIC_ENTRY_WORD0 0x0d105810
573 #define PLT_PIC_ENTRY_WORD1 0x10165811
574 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
575 #define PLT_PIC_ENTRY_WORD3 0x0d105810
576 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
578 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
579 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
580 #define PLT_PIC12_ENTRY_WORD2 0x00000000
581 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
582 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
584 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
585 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
586 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
587 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
588 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
590 #define PLT_ENTRY_WORD0 0x0d105810
591 #define PLT_ENTRY_WORD1 0x10165810
592 #define PLT_ENTRY_WORD2 0x100007f1
593 #define PLT_ENTRY_WORD3 0x0d105810
594 #define PLT_ENTRY_WORD4 0x100ea7f4
596 /* The first PLT entry pushes the offset into the symbol table
597 from R1 onto the stack at 8(15) and the loader object info
598 at 12(15), loads the loader address in R1 and jumps to it. */
600 /* The first entry in the PLT for PIC code:
603 ST 1,28(15) # R1 has offset into symbol table
604 L 1,4(12) # Get loader ino(object struct address)
605 ST 1,24(15) # Store address
606 L 1,8(12) # Entry address of loader in R1
607 BR 1 # Jump to loader
609 The first entry in the PLT for static code:
612 ST 1,28(15) # R1 has offset into symbol table
614 L 1,18(0,1) # Get address of GOT
615 MVC 24(4,15),4(1) # Move loader ino to stack
616 L 1,8(1) # Get address of loader
617 BR 1 # Jump to loader
619 .long got # address of GOT */
621 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
622 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
623 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
624 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
625 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
627 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
628 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
629 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
630 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
631 #define PLT_FIRST_ENTRY_WORD4 0x58101008
632 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
634 /* The s390 linker needs to keep track of the number of relocs that it
635 decides to copy as dynamic relocs in check_relocs for each symbol.
636 This is so that it can later discard them if they are found to be
637 unnecessary. We store the information in a field extending the
638 regular ELF linker hash table. */
640 struct elf_s390_dyn_relocs
642 struct elf_s390_dyn_relocs *next;
644 /* The input section of the reloc. */
647 /* Total number of relocs copied for the input section. */
650 /* Number of pc-relative relocs copied for the input section. */
651 bfd_size_type pc_count;
654 /* s390 ELF linker hash entry. */
656 struct elf_s390_link_hash_entry
658 struct elf_link_hash_entry elf;
660 /* Track dynamic relocs copied for this symbol. */
661 struct elf_s390_dyn_relocs *dyn_relocs;
663 /* Number of GOTPLT references for a function. */
664 bfd_signed_vma gotplt_refcount;
666 #define GOT_UNKNOWN 0
670 #define GOT_TLS_IE_NLT 4
671 unsigned char tls_type;
674 #define elf_s390_hash_entry(ent) \
675 ((struct elf_s390_link_hash_entry *)(ent))
677 /* NOTE: Keep this structure in sync with
678 the one declared in elf64-s390.c. */
679 struct elf_s390_obj_tdata
681 struct elf_obj_tdata root;
683 /* TLS type for each local got entry. */
684 char *local_got_tls_type;
687 #define elf_s390_tdata(abfd) \
688 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
690 #define elf_s390_local_got_tls_type(abfd) \
691 (elf_s390_tdata (abfd)->local_got_tls_type)
693 #define is_s390_elf(bfd) \
694 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
695 && elf_tdata (bfd) != NULL \
696 && elf_object_id (bfd) == S390_ELF_TDATA)
699 elf_s390_mkobject (bfd *abfd)
701 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
706 elf_s390_object_p (abfd)
709 /* Set the right machine number for an s390 elf32 file. */
710 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
713 /* s390 ELF linker hash table. */
715 struct elf_s390_link_hash_table
717 struct elf_link_hash_table elf;
719 /* Short-cuts to get to dynamic linker sections. */
729 bfd_signed_vma refcount;
733 /* Small local sym cache. */
734 struct sym_cache sym_cache;
737 /* Get the s390 ELF linker hash table from a link_info structure. */
739 #define elf_s390_hash_table(p) \
740 ((struct elf_s390_link_hash_table *) ((p)->hash))
742 /* Create an entry in an s390 ELF linker hash table. */
744 static struct bfd_hash_entry *
745 link_hash_newfunc (entry, table, string)
746 struct bfd_hash_entry *entry;
747 struct bfd_hash_table *table;
750 /* Allocate the structure if it has not already been allocated by a
754 entry = bfd_hash_allocate (table,
755 sizeof (struct elf_s390_link_hash_entry));
760 /* Call the allocation method of the superclass. */
761 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
764 struct elf_s390_link_hash_entry *eh;
766 eh = (struct elf_s390_link_hash_entry *) entry;
767 eh->dyn_relocs = NULL;
768 eh->gotplt_refcount = 0;
769 eh->tls_type = GOT_UNKNOWN;
775 /* Create an s390 ELF linker hash table. */
777 static struct bfd_link_hash_table *
778 elf_s390_link_hash_table_create (abfd)
781 struct elf_s390_link_hash_table *ret;
782 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
784 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
788 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
789 sizeof (struct elf_s390_link_hash_entry)))
802 ret->tls_ldm_got.refcount = 0;
803 ret->sym_cache.abfd = NULL;
805 return &ret->elf.root;
808 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
809 shortcuts to them in our hash table. */
812 create_got_section (dynobj, info)
814 struct bfd_link_info *info;
816 struct elf_s390_link_hash_table *htab;
818 if (! _bfd_elf_create_got_section (dynobj, info))
821 htab = elf_s390_hash_table (info);
822 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
823 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
824 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
825 if (!htab->sgot || !htab->sgotplt || !htab->srelgot)
831 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
832 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
836 elf_s390_create_dynamic_sections (dynobj, info)
838 struct bfd_link_info *info;
840 struct elf_s390_link_hash_table *htab;
842 htab = elf_s390_hash_table (info);
843 if (!htab->sgot && !create_got_section (dynobj, info))
846 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
849 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
850 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
851 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
853 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
855 if (!htab->splt || !htab->srelplt || !htab->sdynbss
856 || (!info->shared && !htab->srelbss))
862 /* Copy the extra info we tack onto an elf_link_hash_entry. */
865 elf_s390_copy_indirect_symbol (info, dir, ind)
866 struct bfd_link_info *info;
867 struct elf_link_hash_entry *dir, *ind;
869 struct elf_s390_link_hash_entry *edir, *eind;
871 edir = (struct elf_s390_link_hash_entry *) dir;
872 eind = (struct elf_s390_link_hash_entry *) ind;
874 if (eind->dyn_relocs != NULL)
876 if (edir->dyn_relocs != NULL)
878 struct elf_s390_dyn_relocs **pp;
879 struct elf_s390_dyn_relocs *p;
881 /* Add reloc counts against the indirect sym to the direct sym
882 list. Merge any entries against the same section. */
883 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
885 struct elf_s390_dyn_relocs *q;
887 for (q = edir->dyn_relocs; q != NULL; q = q->next)
888 if (q->sec == p->sec)
890 q->pc_count += p->pc_count;
891 q->count += p->count;
898 *pp = edir->dyn_relocs;
901 edir->dyn_relocs = eind->dyn_relocs;
902 eind->dyn_relocs = NULL;
905 if (ind->root.type == bfd_link_hash_indirect
906 && dir->got.refcount <= 0)
908 edir->tls_type = eind->tls_type;
909 eind->tls_type = GOT_UNKNOWN;
912 if (ELIMINATE_COPY_RELOCS
913 && ind->root.type != bfd_link_hash_indirect
914 && dir->dynamic_adjusted)
916 /* If called to transfer flags for a weakdef during processing
917 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
918 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
919 dir->ref_dynamic |= ind->ref_dynamic;
920 dir->ref_regular |= ind->ref_regular;
921 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
922 dir->needs_plt |= ind->needs_plt;
925 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
929 elf_s390_tls_transition (info, r_type, is_local)
930 struct bfd_link_info *info;
942 return R_390_TLS_LE32;
943 return R_390_TLS_IE32;
944 case R_390_TLS_GOTIE32:
946 return R_390_TLS_LE32;
947 return R_390_TLS_GOTIE32;
948 case R_390_TLS_LDM32:
949 return R_390_TLS_LE32;
955 /* Look through the relocs for a section during the first phase, and
956 allocate space in the global offset table or procedure linkage
960 elf_s390_check_relocs (abfd, info, sec, relocs)
962 struct bfd_link_info *info;
964 const Elf_Internal_Rela *relocs;
966 struct elf_s390_link_hash_table *htab;
967 Elf_Internal_Shdr *symtab_hdr;
968 struct elf_link_hash_entry **sym_hashes;
969 const Elf_Internal_Rela *rel;
970 const Elf_Internal_Rela *rel_end;
972 bfd_signed_vma *local_got_refcounts;
973 int tls_type, old_tls_type;
975 if (info->relocatable)
978 BFD_ASSERT (is_s390_elf (abfd));
980 htab = elf_s390_hash_table (info);
981 symtab_hdr = &elf_symtab_hdr (abfd);
982 sym_hashes = elf_sym_hashes (abfd);
983 local_got_refcounts = elf_local_got_refcounts (abfd);
987 rel_end = relocs + sec->reloc_count;
988 for (rel = relocs; rel < rel_end; rel++)
991 unsigned long r_symndx;
992 struct elf_link_hash_entry *h;
994 r_symndx = ELF32_R_SYM (rel->r_info);
996 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
998 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1003 if (r_symndx < symtab_hdr->sh_info)
1007 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1008 while (h->root.type == bfd_link_hash_indirect
1009 || h->root.type == bfd_link_hash_warning)
1010 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1013 /* Create got section and local_got_refcounts array if they
1015 r_type = elf_s390_tls_transition (info,
1016 ELF32_R_TYPE (rel->r_info),
1025 case R_390_GOTPLT12:
1026 case R_390_GOTPLT16:
1027 case R_390_GOTPLT20:
1028 case R_390_GOTPLT32:
1029 case R_390_GOTPLTENT:
1030 case R_390_TLS_GD32:
1031 case R_390_TLS_GOTIE12:
1032 case R_390_TLS_GOTIE20:
1033 case R_390_TLS_GOTIE32:
1034 case R_390_TLS_IEENT:
1035 case R_390_TLS_IE32:
1036 case R_390_TLS_LDM32:
1038 && local_got_refcounts == NULL)
1042 size = symtab_hdr->sh_info;
1043 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1044 local_got_refcounts = ((bfd_signed_vma *)
1045 bfd_zalloc (abfd, size));
1046 if (local_got_refcounts == NULL)
1048 elf_local_got_refcounts (abfd) = local_got_refcounts;
1049 elf_s390_local_got_tls_type (abfd)
1050 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1053 case R_390_GOTOFF16:
1054 case R_390_GOTOFF32:
1056 case R_390_GOTPCDBL:
1057 if (htab->sgot == NULL)
1059 if (htab->elf.dynobj == NULL)
1060 htab->elf.dynobj = abfd;
1061 if (!create_got_section (htab->elf.dynobj, info))
1068 case R_390_GOTOFF16:
1069 case R_390_GOTOFF32:
1071 case R_390_GOTPCDBL:
1072 /* Got is created, nothing to be done. */
1075 case R_390_PLT16DBL:
1076 case R_390_PLT32DBL:
1078 case R_390_PLTOFF16:
1079 case R_390_PLTOFF32:
1080 /* This symbol requires a procedure linkage table entry. We
1081 actually build the entry in adjust_dynamic_symbol,
1082 because this might be a case of linking PIC code which is
1083 never referenced by a dynamic object, in which case we
1084 don't need to generate a procedure linkage table entry
1087 /* If this is a local symbol, we resolve it directly without
1088 creating a procedure linkage table entry. */
1092 h->plt.refcount += 1;
1096 case R_390_GOTPLT12:
1097 case R_390_GOTPLT16:
1098 case R_390_GOTPLT20:
1099 case R_390_GOTPLT32:
1100 case R_390_GOTPLTENT:
1101 /* This symbol requires either a procedure linkage table entry
1102 or an entry in the local got. We actually build the entry
1103 in adjust_dynamic_symbol because whether this is really a
1104 global reference can change and with it the fact if we have
1105 to create a plt entry or a local got entry. To be able to
1106 make a once global symbol a local one we have to keep track
1107 of the number of gotplt references that exist for this
1111 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1113 h->plt.refcount += 1;
1116 local_got_refcounts[r_symndx] += 1;
1119 case R_390_TLS_LDM32:
1120 htab->tls_ldm_got.refcount += 1;
1123 case R_390_TLS_IE32:
1124 case R_390_TLS_GOTIE12:
1125 case R_390_TLS_GOTIE20:
1126 case R_390_TLS_GOTIE32:
1127 case R_390_TLS_IEENT:
1129 info->flags |= DF_STATIC_TLS;
1137 case R_390_TLS_GD32:
1138 /* This symbol requires a global offset table entry. */
1147 tls_type = GOT_NORMAL;
1149 case R_390_TLS_GD32:
1150 tls_type = GOT_TLS_GD;
1152 case R_390_TLS_IE32:
1153 case R_390_TLS_GOTIE32:
1154 tls_type = GOT_TLS_IE;
1156 case R_390_TLS_GOTIE12:
1157 case R_390_TLS_GOTIE20:
1158 case R_390_TLS_IEENT:
1159 tls_type = GOT_TLS_IE_NLT;
1165 h->got.refcount += 1;
1166 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1170 local_got_refcounts[r_symndx] += 1;
1171 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1173 /* If a TLS symbol is accessed using IE at least once,
1174 there is no point to use dynamic model for it. */
1175 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1177 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1179 (*_bfd_error_handler)
1180 (_("%B: `%s' accessed both as normal and thread local symbol"),
1181 abfd, h->root.root.string);
1184 if (old_tls_type > tls_type)
1185 tls_type = old_tls_type;
1188 if (old_tls_type != tls_type)
1191 elf_s390_hash_entry (h)->tls_type = tls_type;
1193 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1196 if (r_type != R_390_TLS_IE32)
1200 case R_390_TLS_LE32:
1203 info->flags |= DF_STATIC_TLS;
1213 if (h != NULL && !info->shared)
1215 /* If this reloc is in a read-only section, we might
1216 need a copy reloc. We can't check reliably at this
1217 stage whether the section is read-only, as input
1218 sections have not yet been mapped to output sections.
1219 Tentatively set the flag for now, and correct in
1220 adjust_dynamic_symbol. */
1223 /* We may need a .plt entry if the function this reloc
1224 refers to is in a shared lib. */
1225 h->plt.refcount += 1;
1228 /* If we are creating a shared library, and this is a reloc
1229 against a global symbol, or a non PC relative reloc
1230 against a local symbol, then we need to copy the reloc
1231 into the shared library. However, if we are linking with
1232 -Bsymbolic, we do not need to copy a reloc against a
1233 global symbol which is defined in an object we are
1234 including in the link (i.e., DEF_REGULAR is set). At
1235 this point we have not seen all the input files, so it is
1236 possible that DEF_REGULAR is not set now but will be set
1237 later (it is never cleared). In case of a weak definition,
1238 DEF_REGULAR may be cleared later by a strong definition in
1239 a shared library. We account for that possibility below by
1240 storing information in the relocs_copied field of the hash
1241 table entry. A similar situation occurs when creating
1242 shared libraries and symbol visibility changes render the
1245 If on the other hand, we are creating an executable, we
1246 may need to keep relocations for symbols satisfied by a
1247 dynamic library if we manage to avoid copy relocs for the
1250 && (sec->flags & SEC_ALLOC) != 0
1251 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1252 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1253 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1254 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1256 && (! SYMBOLIC_BIND (info, h)
1257 || h->root.type == bfd_link_hash_defweak
1258 || !h->def_regular))))
1259 || (ELIMINATE_COPY_RELOCS
1261 && (sec->flags & SEC_ALLOC) != 0
1263 && (h->root.type == bfd_link_hash_defweak
1264 || !h->def_regular)))
1266 struct elf_s390_dyn_relocs *p;
1267 struct elf_s390_dyn_relocs **head;
1269 /* We must copy these reloc types into the output file.
1270 Create a reloc section in dynobj and make room for
1274 if (htab->elf.dynobj == NULL)
1275 htab->elf.dynobj = abfd;
1277 sreloc = _bfd_elf_make_dynamic_reloc_section
1278 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1284 /* If this is a global symbol, we count the number of
1285 relocations we need for this symbol. */
1288 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1292 /* Track dynamic relocs needed for local syms too.
1293 We really need local syms available to do this
1297 Elf_Internal_Sym *isym;
1299 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1304 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1308 vpp = &elf_section_data (s)->local_dynrel;
1309 head = (struct elf_s390_dyn_relocs **) vpp;
1313 if (p == NULL || p->sec != sec)
1315 bfd_size_type amt = sizeof *p;
1317 p = ((struct elf_s390_dyn_relocs *)
1318 bfd_alloc (htab->elf.dynobj, amt));
1329 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1330 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1331 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1332 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1337 /* This relocation describes the C++ object vtable hierarchy.
1338 Reconstruct it for later use during GC. */
1339 case R_390_GNU_VTINHERIT:
1340 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1344 /* This relocation describes which C++ vtable entries are actually
1345 used. Record for later use during GC. */
1346 case R_390_GNU_VTENTRY:
1347 BFD_ASSERT (h != NULL);
1349 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1361 /* Return the section that should be marked against GC for a given
1365 elf_s390_gc_mark_hook (asection *sec,
1366 struct bfd_link_info *info,
1367 Elf_Internal_Rela *rel,
1368 struct elf_link_hash_entry *h,
1369 Elf_Internal_Sym *sym)
1372 switch (ELF32_R_TYPE (rel->r_info))
1374 case R_390_GNU_VTINHERIT:
1375 case R_390_GNU_VTENTRY:
1378 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1382 /* Update the got entry reference counts for the section being removed. */
1385 elf_s390_gc_sweep_hook (bfd *abfd,
1386 struct bfd_link_info *info,
1388 const Elf_Internal_Rela *relocs)
1390 Elf_Internal_Shdr *symtab_hdr;
1391 struct elf_link_hash_entry **sym_hashes;
1392 bfd_signed_vma *local_got_refcounts;
1393 const Elf_Internal_Rela *rel, *relend;
1395 if (info->relocatable)
1398 elf_section_data (sec)->local_dynrel = NULL;
1400 symtab_hdr = &elf_symtab_hdr (abfd);
1401 sym_hashes = elf_sym_hashes (abfd);
1402 local_got_refcounts = elf_local_got_refcounts (abfd);
1404 relend = relocs + sec->reloc_count;
1405 for (rel = relocs; rel < relend; rel++)
1407 unsigned long r_symndx;
1408 unsigned int r_type;
1409 struct elf_link_hash_entry *h = NULL;
1411 r_symndx = ELF32_R_SYM (rel->r_info);
1412 if (r_symndx >= symtab_hdr->sh_info)
1414 struct elf_s390_link_hash_entry *eh;
1415 struct elf_s390_dyn_relocs **pp;
1416 struct elf_s390_dyn_relocs *p;
1418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1419 while (h->root.type == bfd_link_hash_indirect
1420 || h->root.type == bfd_link_hash_warning)
1421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1422 eh = (struct elf_s390_link_hash_entry *) h;
1424 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1427 /* Everything must go for SEC. */
1433 r_type = ELF32_R_TYPE (rel->r_info);
1434 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1437 case R_390_TLS_LDM32:
1438 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1439 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1442 case R_390_TLS_GD32:
1443 case R_390_TLS_IE32:
1444 case R_390_TLS_GOTIE12:
1445 case R_390_TLS_GOTIE20:
1446 case R_390_TLS_GOTIE32:
1447 case R_390_TLS_IEENT:
1452 case R_390_GOTOFF16:
1453 case R_390_GOTOFF32:
1455 case R_390_GOTPCDBL:
1459 if (h->got.refcount > 0)
1460 h->got.refcount -= 1;
1462 else if (local_got_refcounts != NULL)
1464 if (local_got_refcounts[r_symndx] > 0)
1465 local_got_refcounts[r_symndx] -= 1;
1482 case R_390_PLT16DBL:
1483 case R_390_PLT32DBL:
1485 case R_390_PLTOFF16:
1486 case R_390_PLTOFF32:
1489 if (h->plt.refcount > 0)
1490 h->plt.refcount -= 1;
1494 case R_390_GOTPLT12:
1495 case R_390_GOTPLT16:
1496 case R_390_GOTPLT20:
1497 case R_390_GOTPLT32:
1498 case R_390_GOTPLTENT:
1501 if (h->plt.refcount > 0)
1503 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1504 h->plt.refcount -= 1;
1507 else if (local_got_refcounts != NULL)
1509 if (local_got_refcounts[r_symndx] > 0)
1510 local_got_refcounts[r_symndx] -= 1;
1522 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1523 entry but we found we will not create any. Called when we find we will
1524 not have any PLT for this symbol, by for example
1525 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1526 or elf_s390_size_dynamic_sections if no dynamic sections will be
1527 created (we're only linking static objects). */
1530 elf_s390_adjust_gotplt (h)
1531 struct elf_s390_link_hash_entry *h;
1533 if (h->elf.root.type == bfd_link_hash_warning)
1534 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1536 if (h->gotplt_refcount <= 0)
1539 /* We simply add the number of gotplt references to the number
1540 * of got references for this symbol. */
1541 h->elf.got.refcount += h->gotplt_refcount;
1542 h->gotplt_refcount = -1;
1545 /* Adjust a symbol defined by a dynamic object and referenced by a
1546 regular object. The current definition is in some section of the
1547 dynamic object, but we're not including those sections. We have to
1548 change the definition to something the rest of the link can
1552 elf_s390_adjust_dynamic_symbol (info, h)
1553 struct bfd_link_info *info;
1554 struct elf_link_hash_entry *h;
1556 struct elf_s390_link_hash_table *htab;
1559 /* If this is a function, put it in the procedure linkage table. We
1560 will fill in the contents of the procedure linkage table later
1561 (although we could actually do it here). */
1562 if (h->type == STT_FUNC
1565 if (h->plt.refcount <= 0
1566 || SYMBOL_CALLS_LOCAL (info, h)
1567 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1568 && h->root.type != bfd_link_hash_undefweak))
1570 /* This case can occur if we saw a PLT32 reloc in an input
1571 file, but the symbol was never referred to by a dynamic
1572 object, or if all references were garbage collected. In
1573 such a case, we don't actually need to build a procedure
1574 linkage table, and we can just do a PC32 reloc instead. */
1575 h->plt.offset = (bfd_vma) -1;
1577 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1583 /* It's possible that we incorrectly decided a .plt reloc was
1584 needed for an R_390_PC32 reloc to a non-function sym in
1585 check_relocs. We can't decide accurately between function and
1586 non-function syms in check-relocs; Objects loaded later in
1587 the link may change h->type. So fix it now. */
1588 h->plt.offset = (bfd_vma) -1;
1590 /* If this is a weak symbol, and there is a real definition, the
1591 processor independent code will have arranged for us to see the
1592 real definition first, and we can just use the same value. */
1593 if (h->u.weakdef != NULL)
1595 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1596 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1597 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1598 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1599 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1600 h->non_got_ref = h->u.weakdef->non_got_ref;
1604 /* This is a reference to a symbol defined by a dynamic object which
1605 is not a function. */
1607 /* If we are creating a shared library, we must presume that the
1608 only references to the symbol are via the global offset table.
1609 For such cases we need not do anything here; the relocations will
1610 be handled correctly by relocate_section. */
1614 /* If there are no references to this symbol that do not use the
1615 GOT, we don't need to generate a copy reloc. */
1616 if (!h->non_got_ref)
1619 /* If -z nocopyreloc was given, we won't generate them either. */
1620 if (info->nocopyreloc)
1626 if (ELIMINATE_COPY_RELOCS)
1628 struct elf_s390_link_hash_entry * eh;
1629 struct elf_s390_dyn_relocs *p;
1631 eh = (struct elf_s390_link_hash_entry *) h;
1632 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1634 s = p->sec->output_section;
1635 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1639 /* If we didn't find any dynamic relocs in read-only sections, then
1640 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1650 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1651 h->root.root.string);
1655 /* We must allocate the symbol in our .dynbss section, which will
1656 become part of the .bss section of the executable. There will be
1657 an entry for this symbol in the .dynsym section. The dynamic
1658 object will contain position independent code, so all references
1659 from the dynamic object to this symbol will go through the global
1660 offset table. The dynamic linker will use the .dynsym entry to
1661 determine the address it must put in the global offset table, so
1662 both the dynamic object and the regular object will refer to the
1663 same memory location for the variable. */
1665 htab = elf_s390_hash_table (info);
1667 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1668 copy the initial value out of the dynamic object and into the
1669 runtime process image. */
1670 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1672 htab->srelbss->size += sizeof (Elf32_External_Rela);
1678 return _bfd_elf_adjust_dynamic_copy (h, s);
1681 /* Allocate space in .plt, .got and associated reloc sections for
1685 allocate_dynrelocs (h, inf)
1686 struct elf_link_hash_entry *h;
1689 struct bfd_link_info *info;
1690 struct elf_s390_link_hash_table *htab;
1691 struct elf_s390_link_hash_entry *eh;
1692 struct elf_s390_dyn_relocs *p;
1694 if (h->root.type == bfd_link_hash_indirect)
1697 if (h->root.type == bfd_link_hash_warning)
1698 /* When warning symbols are created, they **replace** the "real"
1699 entry in the hash table, thus we never get to see the real
1700 symbol in a hash traversal. So look at it now. */
1701 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1703 info = (struct bfd_link_info *) inf;
1704 htab = elf_s390_hash_table (info);
1706 if (htab->elf.dynamic_sections_created
1707 && h->plt.refcount > 0)
1709 /* Make sure this symbol is output as a dynamic symbol.
1710 Undefined weak syms won't yet be marked as dynamic. */
1711 if (h->dynindx == -1
1712 && !h->forced_local)
1714 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1719 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1721 asection *s = htab->splt;
1723 /* If this is the first .plt entry, make room for the special
1726 s->size += PLT_FIRST_ENTRY_SIZE;
1728 h->plt.offset = s->size;
1730 /* If this symbol is not defined in a regular file, and we are
1731 not generating a shared library, then set the symbol to this
1732 location in the .plt. This is required to make function
1733 pointers compare as equal between the normal executable and
1734 the shared library. */
1738 h->root.u.def.section = s;
1739 h->root.u.def.value = h->plt.offset;
1742 /* Make room for this entry. */
1743 s->size += PLT_ENTRY_SIZE;
1745 /* We also need to make an entry in the .got.plt section, which
1746 will be placed in the .got section by the linker script. */
1747 htab->sgotplt->size += GOT_ENTRY_SIZE;
1749 /* We also need to make an entry in the .rela.plt section. */
1750 htab->srelplt->size += sizeof (Elf32_External_Rela);
1754 h->plt.offset = (bfd_vma) -1;
1756 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1761 h->plt.offset = (bfd_vma) -1;
1763 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1766 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1767 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1768 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1769 we can save the dynamic TLS relocation. */
1770 if (h->got.refcount > 0
1773 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1775 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1776 /* For the GOTIE access without a literal pool entry the offset has
1777 to be stored somewhere. The immediate value in the instruction
1778 is not bit enough so the value is stored in the got. */
1780 h->got.offset = htab->sgot->size;
1781 htab->sgot->size += GOT_ENTRY_SIZE;
1784 h->got.offset = (bfd_vma) -1;
1786 else if (h->got.refcount > 0)
1790 int tls_type = elf_s390_hash_entry(h)->tls_type;
1792 /* Make sure this symbol is output as a dynamic symbol.
1793 Undefined weak syms won't yet be marked as dynamic. */
1794 if (h->dynindx == -1
1795 && !h->forced_local)
1797 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1802 h->got.offset = s->size;
1803 s->size += GOT_ENTRY_SIZE;
1804 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1805 if (tls_type == GOT_TLS_GD)
1806 s->size += GOT_ENTRY_SIZE;
1807 dyn = htab->elf.dynamic_sections_created;
1808 /* R_390_TLS_IE32 needs one dynamic relocation,
1809 R_390_TLS_GD32 needs one if local symbol and two if global. */
1810 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1811 || tls_type >= GOT_TLS_IE)
1812 htab->srelgot->size += sizeof (Elf32_External_Rela);
1813 else if (tls_type == GOT_TLS_GD)
1814 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1815 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1816 || h->root.type != bfd_link_hash_undefweak)
1818 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1819 htab->srelgot->size += sizeof (Elf32_External_Rela);
1822 h->got.offset = (bfd_vma) -1;
1824 eh = (struct elf_s390_link_hash_entry *) h;
1825 if (eh->dyn_relocs == NULL)
1828 /* In the shared -Bsymbolic case, discard space allocated for
1829 dynamic pc-relative relocs against symbols which turn out to be
1830 defined in regular objects. For the normal shared case, discard
1831 space for pc-relative relocs that have become local due to symbol
1832 visibility changes. */
1836 if (SYMBOL_CALLS_LOCAL (info, h))
1838 struct elf_s390_dyn_relocs **pp;
1840 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1842 p->count -= p->pc_count;
1851 /* Also discard relocs on undefined weak syms with non-default
1853 if (eh->dyn_relocs != NULL
1854 && h->root.type == bfd_link_hash_undefweak)
1856 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1857 eh->dyn_relocs = NULL;
1859 /* Make sure undefined weak symbols are output as a dynamic
1861 else if (h->dynindx == -1
1862 && !h->forced_local)
1864 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1869 else if (ELIMINATE_COPY_RELOCS)
1871 /* For the non-shared case, discard space for relocs against
1872 symbols which turn out to need copy relocs or are not
1878 || (htab->elf.dynamic_sections_created
1879 && (h->root.type == bfd_link_hash_undefweak
1880 || h->root.type == bfd_link_hash_undefined))))
1882 /* Make sure this symbol is output as a dynamic symbol.
1883 Undefined weak syms won't yet be marked as dynamic. */
1884 if (h->dynindx == -1
1885 && !h->forced_local)
1887 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1891 /* If that succeeded, we know we'll be keeping all the
1893 if (h->dynindx != -1)
1897 eh->dyn_relocs = NULL;
1902 /* Finally, allocate space. */
1903 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1905 asection *sreloc = elf_section_data (p->sec)->sreloc;
1907 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1913 /* Find any dynamic relocs that apply to read-only sections. */
1916 readonly_dynrelocs (h, inf)
1917 struct elf_link_hash_entry *h;
1920 struct elf_s390_link_hash_entry *eh;
1921 struct elf_s390_dyn_relocs *p;
1923 if (h->root.type == bfd_link_hash_warning)
1924 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1926 eh = (struct elf_s390_link_hash_entry *) h;
1927 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1929 asection *s = p->sec->output_section;
1931 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1933 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1935 info->flags |= DF_TEXTREL;
1937 /* Not an error, just cut short the traversal. */
1944 /* Set the sizes of the dynamic sections. */
1947 elf_s390_size_dynamic_sections (output_bfd, info)
1948 bfd *output_bfd ATTRIBUTE_UNUSED;
1949 struct bfd_link_info *info;
1951 struct elf_s390_link_hash_table *htab;
1957 htab = elf_s390_hash_table (info);
1958 dynobj = htab->elf.dynobj;
1962 if (htab->elf.dynamic_sections_created)
1964 /* Set the contents of the .interp section to the interpreter. */
1965 if (info->executable)
1967 s = bfd_get_section_by_name (dynobj, ".interp");
1970 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1971 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1975 /* Set up .got offsets for local syms, and space for local dynamic
1977 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1979 bfd_signed_vma *local_got;
1980 bfd_signed_vma *end_local_got;
1981 char *local_tls_type;
1982 bfd_size_type locsymcount;
1983 Elf_Internal_Shdr *symtab_hdr;
1986 if (! is_s390_elf (ibfd))
1989 for (s = ibfd->sections; s != NULL; s = s->next)
1991 struct elf_s390_dyn_relocs *p;
1993 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1995 if (!bfd_is_abs_section (p->sec)
1996 && bfd_is_abs_section (p->sec->output_section))
1998 /* Input section has been discarded, either because
1999 it is a copy of a linkonce section or due to
2000 linker script /DISCARD/, so we'll be discarding
2003 else if (p->count != 0)
2005 srela = elf_section_data (p->sec)->sreloc;
2006 srela->size += p->count * sizeof (Elf32_External_Rela);
2007 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2008 info->flags |= DF_TEXTREL;
2013 local_got = elf_local_got_refcounts (ibfd);
2017 symtab_hdr = &elf_symtab_hdr (ibfd);
2018 locsymcount = symtab_hdr->sh_info;
2019 end_local_got = local_got + locsymcount;
2020 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2022 srela = htab->srelgot;
2023 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2027 *local_got = s->size;
2028 s->size += GOT_ENTRY_SIZE;
2029 if (*local_tls_type == GOT_TLS_GD)
2030 s->size += GOT_ENTRY_SIZE;
2032 srela->size += sizeof (Elf32_External_Rela);
2035 *local_got = (bfd_vma) -1;
2039 if (htab->tls_ldm_got.refcount > 0)
2041 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2043 htab->tls_ldm_got.offset = htab->sgot->size;
2044 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2045 htab->srelgot->size += sizeof (Elf32_External_Rela);
2048 htab->tls_ldm_got.offset = -1;
2050 /* Allocate global sym .plt and .got entries, and space for global
2051 sym dynamic relocs. */
2052 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2054 /* We now have determined the sizes of the various dynamic sections.
2055 Allocate memory for them. */
2057 for (s = dynobj->sections; s != NULL; s = s->next)
2059 if ((s->flags & SEC_LINKER_CREATED) == 0)
2064 || s == htab->sgotplt
2065 || s == htab->sdynbss)
2067 /* Strip this section if we don't need it; see the
2070 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2075 /* We use the reloc_count field as a counter if we need
2076 to copy relocs into the output file. */
2081 /* It's not one of our sections, so don't allocate space. */
2087 /* If we don't need this section, strip it from the
2088 output file. This is to handle .rela.bss and
2089 .rela.plt. We must create it in
2090 create_dynamic_sections, because it must be created
2091 before the linker maps input sections to output
2092 sections. The linker does that before
2093 adjust_dynamic_symbol is called, and it is that
2094 function which decides whether anything needs to go
2095 into these sections. */
2097 s->flags |= SEC_EXCLUDE;
2101 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2104 /* Allocate memory for the section contents. We use bfd_zalloc
2105 here in case unused entries are not reclaimed before the
2106 section's contents are written out. This should not happen,
2107 but this way if it does, we get a R_390_NONE reloc instead
2109 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2110 if (s->contents == NULL)
2114 if (htab->elf.dynamic_sections_created)
2116 /* Add some entries to the .dynamic section. We fill in the
2117 values later, in elf_s390_finish_dynamic_sections, but we
2118 must add the entries now so that we get the correct size for
2119 the .dynamic section. The DT_DEBUG entry is filled in by the
2120 dynamic linker and used by the debugger. */
2121 #define add_dynamic_entry(TAG, VAL) \
2122 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2124 if (info->executable)
2126 if (!add_dynamic_entry (DT_DEBUG, 0))
2130 if (htab->splt->size != 0)
2132 if (!add_dynamic_entry (DT_PLTGOT, 0)
2133 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2134 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2135 || !add_dynamic_entry (DT_JMPREL, 0))
2141 if (!add_dynamic_entry (DT_RELA, 0)
2142 || !add_dynamic_entry (DT_RELASZ, 0)
2143 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2146 /* If any dynamic relocs apply to a read-only section,
2147 then we need a DT_TEXTREL entry. */
2148 if ((info->flags & DF_TEXTREL) == 0)
2149 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2152 if ((info->flags & DF_TEXTREL) != 0)
2154 if (!add_dynamic_entry (DT_TEXTREL, 0))
2159 #undef add_dynamic_entry
2164 /* Return the base VMA address which should be subtracted from real addresses
2165 when resolving @dtpoff relocation.
2166 This is PT_TLS segment p_vaddr. */
2170 struct bfd_link_info *info;
2172 /* If tls_sec is NULL, we should have signalled an error already. */
2173 if (elf_hash_table (info)->tls_sec == NULL)
2175 return elf_hash_table (info)->tls_sec->vma;
2178 /* Return the relocation value for @tpoff relocation
2179 if STT_TLS virtual address is ADDRESS. */
2182 tpoff (info, address)
2183 struct bfd_link_info *info;
2186 struct elf_link_hash_table *htab = elf_hash_table (info);
2188 /* If tls_sec is NULL, we should have signalled an error already. */
2189 if (htab->tls_sec == NULL)
2191 return htab->tls_size + htab->tls_sec->vma - address;
2194 /* Complain if TLS instruction relocation is against an invalid
2198 invalid_tls_insn (input_bfd, input_section, rel)
2200 asection *input_section;
2201 Elf_Internal_Rela *rel;
2203 reloc_howto_type *howto;
2205 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2206 (*_bfd_error_handler)
2207 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2210 (long) rel->r_offset,
2212 bfd_set_error (bfd_error_bad_value);
2215 /* Relocate a 390 ELF section. */
2218 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2219 contents, relocs, local_syms, local_sections)
2221 struct bfd_link_info *info;
2223 asection *input_section;
2225 Elf_Internal_Rela *relocs;
2226 Elf_Internal_Sym *local_syms;
2227 asection **local_sections;
2229 struct elf_s390_link_hash_table *htab;
2230 Elf_Internal_Shdr *symtab_hdr;
2231 struct elf_link_hash_entry **sym_hashes;
2232 bfd_vma *local_got_offsets;
2233 Elf_Internal_Rela *rel;
2234 Elf_Internal_Rela *relend;
2236 BFD_ASSERT (is_s390_elf (input_bfd));
2238 htab = elf_s390_hash_table (info);
2239 symtab_hdr = &elf_symtab_hdr (input_bfd);
2240 sym_hashes = elf_sym_hashes (input_bfd);
2241 local_got_offsets = elf_local_got_offsets (input_bfd);
2244 relend = relocs + input_section->reloc_count;
2245 for (; rel < relend; rel++)
2247 unsigned int r_type;
2248 reloc_howto_type *howto;
2249 unsigned long r_symndx;
2250 struct elf_link_hash_entry *h;
2251 Elf_Internal_Sym *sym;
2255 bfd_boolean unresolved_reloc;
2256 bfd_reloc_status_type r;
2259 r_type = ELF32_R_TYPE (rel->r_info);
2260 if (r_type == (int) R_390_GNU_VTINHERIT
2261 || r_type == (int) R_390_GNU_VTENTRY)
2263 if (r_type >= (int) R_390_max)
2265 bfd_set_error (bfd_error_bad_value);
2269 howto = elf_howto_table + r_type;
2270 r_symndx = ELF32_R_SYM (rel->r_info);
2275 unresolved_reloc = FALSE;
2276 if (r_symndx < symtab_hdr->sh_info)
2278 sym = local_syms + r_symndx;
2279 sec = local_sections[r_symndx];
2280 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2284 bfd_boolean warned ATTRIBUTE_UNUSED;
2286 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2287 r_symndx, symtab_hdr, sym_hashes,
2289 unresolved_reloc, warned);
2292 if (sec != NULL && elf_discarded_section (sec))
2294 /* For relocs against symbols from removed linkonce sections,
2295 or sections discarded by a linker script, we just want the
2296 section contents zeroed. Avoid any special processing. */
2297 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2303 if (info->relocatable)
2308 case R_390_GOTPLT12:
2309 case R_390_GOTPLT16:
2310 case R_390_GOTPLT20:
2311 case R_390_GOTPLT32:
2312 case R_390_GOTPLTENT:
2313 /* There are three cases for a GOTPLT relocation. 1) The
2314 relocation is against the jump slot entry of a plt that
2315 will get emitted to the output file. 2) The relocation
2316 is against the jump slot of a plt entry that has been
2317 removed. elf_s390_adjust_gotplt has created a GOT entry
2318 as replacement. 3) The relocation is against a local symbol.
2319 Cases 2) and 3) are the same as the GOT relocation code
2320 so we just have to test for case 1 and fall through for
2322 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2327 Current offset - size first entry / entry size. */
2328 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2331 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2333 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2334 unresolved_reloc = FALSE;
2336 if (r_type == R_390_GOTPLTENT)
2337 relocation += htab->sgot->output_section->vma;
2347 /* Relocation is to the entry for this symbol in the global
2349 if (htab->sgot == NULL)
2356 off = h->got.offset;
2357 dyn = htab->elf.dynamic_sections_created;
2358 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2360 && SYMBOL_REFERENCES_LOCAL (info, h))
2361 || (ELF_ST_VISIBILITY (h->other)
2362 && h->root.type == bfd_link_hash_undefweak))
2364 /* This is actually a static link, or it is a
2365 -Bsymbolic link and the symbol is defined
2366 locally, or the symbol was forced to be local
2367 because of a version file. We must initialize
2368 this entry in the global offset table. Since the
2369 offset must always be a multiple of 2, we use the
2370 least significant bit to record whether we have
2371 initialized it already.
2373 When doing a dynamic link, we create a .rel.got
2374 relocation entry to initialize the value. This
2375 is done in the finish_dynamic_symbol routine. */
2380 bfd_put_32 (output_bfd, relocation,
2381 htab->sgot->contents + off);
2386 unresolved_reloc = FALSE;
2390 if (local_got_offsets == NULL)
2393 off = local_got_offsets[r_symndx];
2395 /* The offset must always be a multiple of 4. We use
2396 the least significant bit to record whether we have
2397 already generated the necessary reloc. */
2402 bfd_put_32 (output_bfd, relocation,
2403 htab->sgot->contents + off);
2408 Elf_Internal_Rela outrel;
2411 srelgot = htab->srelgot;
2412 if (srelgot == NULL)
2415 outrel.r_offset = (htab->sgot->output_section->vma
2416 + htab->sgot->output_offset
2418 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2419 outrel.r_addend = relocation;
2420 loc = srelgot->contents;
2421 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2422 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2425 local_got_offsets[r_symndx] |= 1;
2429 if (off >= (bfd_vma) -2)
2432 relocation = htab->sgot->output_offset + off;
2434 /* For @GOTENT the relocation is against the offset between
2435 the instruction and the symbols entry in the GOT and not
2436 between the start of the GOT and the symbols entry. We
2437 add the vma of the GOT to get the correct value. */
2438 if ( r_type == R_390_GOTENT
2439 || r_type == R_390_GOTPLTENT)
2440 relocation += htab->sgot->output_section->vma;
2444 case R_390_GOTOFF16:
2445 case R_390_GOTOFF32:
2446 /* Relocation is relative to the start of the global offset
2449 /* Note that sgot->output_offset is not involved in this
2450 calculation. We always want the start of .got. If we
2451 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2452 permitted by the ABI, we might have to change this
2454 relocation -= htab->sgot->output_section->vma;
2458 case R_390_GOTPCDBL:
2459 /* Use global offset table as symbol value. */
2460 relocation = htab->sgot->output_section->vma;
2461 unresolved_reloc = FALSE;
2464 case R_390_PLT16DBL:
2465 case R_390_PLT32DBL:
2467 /* Relocation is to the entry for this symbol in the
2468 procedure linkage table. */
2470 /* Resolve a PLT32 reloc against a local symbol directly,
2471 without using the procedure linkage table. */
2475 if (h->plt.offset == (bfd_vma) -1
2476 || htab->splt == NULL)
2478 /* We didn't make a PLT entry for this symbol. This
2479 happens when statically linking PIC code, or when
2480 using -Bsymbolic. */
2484 relocation = (htab->splt->output_section->vma
2485 + htab->splt->output_offset
2487 unresolved_reloc = FALSE;
2490 case R_390_PLTOFF16:
2491 case R_390_PLTOFF32:
2492 /* Relocation is to the entry for this symbol in the
2493 procedure linkage table relative to the start of the GOT. */
2495 /* For local symbols or if we didn't make a PLT entry for
2496 this symbol resolve the symbol directly. */
2498 || h->plt.offset == (bfd_vma) -1
2499 || htab->splt == NULL)
2501 relocation -= htab->sgot->output_section->vma;
2505 relocation = (htab->splt->output_section->vma
2506 + htab->splt->output_offset
2508 - htab->sgot->output_section->vma);
2509 unresolved_reloc = FALSE;
2519 if ((input_section->flags & SEC_ALLOC) == 0)
2524 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2525 || h->root.type != bfd_link_hash_undefweak)
2526 && ((r_type != R_390_PC16
2527 && r_type != R_390_PC16DBL
2528 && r_type != R_390_PC32DBL
2529 && r_type != R_390_PC32)
2530 || !SYMBOL_CALLS_LOCAL (info, h)))
2531 || (ELIMINATE_COPY_RELOCS
2538 || h->root.type == bfd_link_hash_undefweak
2539 || h->root.type == bfd_link_hash_undefined)))
2541 Elf_Internal_Rela outrel;
2542 bfd_boolean skip, relocate;
2546 /* When generating a shared object, these relocations
2547 are copied into the output file to be resolved at run
2554 _bfd_elf_section_offset (output_bfd, info, input_section,
2556 if (outrel.r_offset == (bfd_vma) -1)
2558 else if (outrel.r_offset == (bfd_vma) -2)
2559 skip = TRUE, relocate = TRUE;
2560 outrel.r_offset += (input_section->output_section->vma
2561 + input_section->output_offset);
2564 memset (&outrel, 0, sizeof outrel);
2567 && (r_type == R_390_PC16
2568 || r_type == R_390_PC16DBL
2569 || r_type == R_390_PC32DBL
2570 || r_type == R_390_PC32
2572 || !SYMBOLIC_BIND (info, h)
2573 || !h->def_regular))
2575 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2576 outrel.r_addend = rel->r_addend;
2580 /* This symbol is local, or marked to become local. */
2581 outrel.r_addend = relocation + rel->r_addend;
2582 if (r_type == R_390_32)
2585 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2591 if (bfd_is_abs_section (sec))
2593 else if (sec == NULL || sec->owner == NULL)
2595 bfd_set_error(bfd_error_bad_value);
2602 osec = sec->output_section;
2603 sindx = elf_section_data (osec)->dynindx;
2606 osec = htab->elf.text_index_section;
2607 sindx = elf_section_data (osec)->dynindx;
2609 BFD_ASSERT (sindx != 0);
2611 /* We are turning this relocation into one
2612 against a section symbol, so subtract out
2613 the output section's address but not the
2614 offset of the input section in the output
2616 outrel.r_addend -= osec->vma;
2618 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2622 sreloc = elf_section_data (input_section)->sreloc;
2626 loc = sreloc->contents;
2627 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2628 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2630 /* If this reloc is against an external symbol, we do
2631 not want to fiddle with the addend. Otherwise, we
2632 need to include the symbol value so that it becomes
2633 an addend for the dynamic reloc. */
2639 /* Relocations for tls literal pool entries. */
2640 case R_390_TLS_IE32:
2643 Elf_Internal_Rela outrel;
2647 outrel.r_offset = rel->r_offset
2648 + input_section->output_section->vma
2649 + input_section->output_offset;
2650 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2651 sreloc = elf_section_data (input_section)->sreloc;
2654 loc = sreloc->contents;
2655 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2656 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2660 case R_390_TLS_GD32:
2661 case R_390_TLS_GOTIE32:
2662 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2663 tls_type = GOT_UNKNOWN;
2664 if (h == NULL && local_got_offsets)
2665 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2668 tls_type = elf_s390_hash_entry(h)->tls_type;
2669 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2670 r_type = R_390_TLS_LE32;
2672 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2673 r_type = R_390_TLS_IE32;
2675 if (r_type == R_390_TLS_LE32)
2677 /* This relocation gets optimized away by the local exec
2678 access optimization. */
2679 BFD_ASSERT (! unresolved_reloc);
2680 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2681 contents + rel->r_offset);
2685 if (htab->sgot == NULL)
2689 off = h->got.offset;
2692 if (local_got_offsets == NULL)
2695 off = local_got_offsets[r_symndx];
2704 Elf_Internal_Rela outrel;
2708 if (htab->srelgot == NULL)
2711 outrel.r_offset = (htab->sgot->output_section->vma
2712 + htab->sgot->output_offset + off);
2714 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2715 if (r_type == R_390_TLS_GD32)
2716 dr_type = R_390_TLS_DTPMOD;
2718 dr_type = R_390_TLS_TPOFF;
2719 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2720 outrel.r_addend = relocation - dtpoff_base (info);
2722 outrel.r_addend = 0;
2723 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2724 loc = htab->srelgot->contents;
2725 loc += htab->srelgot->reloc_count++
2726 * sizeof (Elf32_External_Rela);
2727 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2729 if (r_type == R_390_TLS_GD32)
2733 BFD_ASSERT (! unresolved_reloc);
2734 bfd_put_32 (output_bfd,
2735 relocation - dtpoff_base (info),
2736 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2740 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2741 outrel.r_offset += GOT_ENTRY_SIZE;
2742 outrel.r_addend = 0;
2743 htab->srelgot->reloc_count++;
2744 loc += sizeof (Elf32_External_Rela);
2745 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2752 local_got_offsets[r_symndx] |= 1;
2755 if (off >= (bfd_vma) -2)
2757 if (r_type == ELF32_R_TYPE (rel->r_info))
2759 relocation = htab->sgot->output_offset + off;
2760 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2761 relocation += htab->sgot->output_section->vma;
2762 unresolved_reloc = FALSE;
2766 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2767 contents + rel->r_offset);
2772 case R_390_TLS_GOTIE12:
2773 case R_390_TLS_GOTIE20:
2774 case R_390_TLS_IEENT:
2777 if (local_got_offsets == NULL)
2779 off = local_got_offsets[r_symndx];
2781 goto emit_tls_relocs;
2785 off = h->got.offset;
2786 tls_type = elf_s390_hash_entry(h)->tls_type;
2787 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2788 goto emit_tls_relocs;
2791 if (htab->sgot == NULL)
2794 BFD_ASSERT (! unresolved_reloc);
2795 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2796 htab->sgot->contents + off);
2797 relocation = htab->sgot->output_offset + off;
2798 if (r_type == R_390_TLS_IEENT)
2799 relocation += htab->sgot->output_section->vma;
2800 unresolved_reloc = FALSE;
2803 case R_390_TLS_LDM32:
2805 /* The literal pool entry this relocation refers to gets ignored
2806 by the optimized code of the local exec model. Do nothing
2807 and the value will turn out zero. */
2810 if (htab->sgot == NULL)
2813 off = htab->tls_ldm_got.offset;
2818 Elf_Internal_Rela outrel;
2821 if (htab->srelgot == NULL)
2824 outrel.r_offset = (htab->sgot->output_section->vma
2825 + htab->sgot->output_offset + off);
2827 bfd_put_32 (output_bfd, 0,
2828 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2829 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2830 outrel.r_addend = 0;
2831 loc = htab->srelgot->contents;
2832 loc += htab->srelgot->reloc_count++
2833 * sizeof (Elf32_External_Rela);
2834 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2835 htab->tls_ldm_got.offset |= 1;
2837 relocation = htab->sgot->output_offset + off;
2838 unresolved_reloc = FALSE;
2841 case R_390_TLS_LE32:
2844 /* Linking a shared library with non-fpic code requires
2845 a R_390_TLS_TPOFF relocation. */
2846 Elf_Internal_Rela outrel;
2851 outrel.r_offset = rel->r_offset
2852 + input_section->output_section->vma
2853 + input_section->output_offset;
2854 if (h != NULL && h->dynindx != -1)
2858 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2860 outrel.r_addend = relocation - dtpoff_base (info);
2862 outrel.r_addend = 0;
2863 sreloc = elf_section_data (input_section)->sreloc;
2866 loc = sreloc->contents;
2867 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2868 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2872 BFD_ASSERT (! unresolved_reloc);
2873 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2874 contents + rel->r_offset);
2878 case R_390_TLS_LDO32:
2880 relocation -= dtpoff_base (info);
2882 /* When converting LDO to LE, we must negate. */
2883 relocation = -tpoff (info, relocation);
2886 /* Relocations for tls instructions. */
2887 case R_390_TLS_LOAD:
2888 case R_390_TLS_GDCALL:
2889 case R_390_TLS_LDCALL:
2890 tls_type = GOT_UNKNOWN;
2891 if (h == NULL && local_got_offsets)
2892 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2894 tls_type = elf_s390_hash_entry(h)->tls_type;
2896 if (tls_type == GOT_TLS_GD)
2899 if (r_type == R_390_TLS_LOAD)
2901 if (!info->shared && (h == NULL || h->dynindx == -1))
2903 /* IE->LE transition. Four valid cases:
2904 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2905 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2906 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2907 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2908 unsigned int insn, ry;
2910 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2912 if ((insn & 0xff00f000) == 0x58000000)
2913 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2914 ry = (insn & 0x000f0000);
2915 else if ((insn & 0xff0f0000) == 0x58000000)
2916 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2917 ry = (insn & 0x0000f000) << 4;
2918 else if ((insn & 0xff00f000) == 0x5800c000)
2919 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2920 ry = (insn & 0x000f0000);
2921 else if ((insn & 0xff0f0000) == 0x580c0000)
2922 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2923 ry = (insn & 0x0000f000) << 4;
2925 invalid_tls_insn (input_bfd, input_section, rel);
2926 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2927 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2930 else if (r_type == R_390_TLS_GDCALL)
2934 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2935 if ((insn & 0xff000fff) != 0x4d000000 &&
2936 (insn & 0xffff0000) != 0xc0e50000)
2937 invalid_tls_insn (input_bfd, input_section, rel);
2938 if (!info->shared && (h == NULL || h->dynindx == -1))
2940 if ((insn & 0xff000000) == 0x4d000000)
2942 /* GD->LE transition.
2943 bas %r14,0(%rx,%r13) -> bc 0,0 */
2948 /* GD->LE transition.
2949 brasl %r14,_tls_get_addr@plt -> brcl 0,. */
2951 bfd_put_16 (output_bfd, 0x0000,
2952 contents + rel->r_offset + 4);
2957 if ((insn & 0xff000000) == 0x4d000000)
2959 /* GD->IE transition.
2960 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2965 /* GD->IE transition.
2966 brasl %r14,__tls_get_addr@plt ->
2967 l %r2,0(%r2,%r12) ; bcr 0,0 */
2969 bfd_put_16 (output_bfd, 0x0700,
2970 contents + rel->r_offset + 4);
2973 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2975 else if (r_type == R_390_TLS_LDCALL)
2981 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2982 if ((insn & 0xff000fff) != 0x4d000000 &&
2983 (insn & 0xffff0000) != 0xc0e50000)
2984 invalid_tls_insn (input_bfd, input_section, rel);
2985 if ((insn & 0xff000000) == 0x4d000000)
2987 /* LD->LE transition.
2988 bas %r14,0(%rx,%r13) -> bc 0,0 */
2993 /* LD->LE transition.
2994 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2996 bfd_put_16 (output_bfd, 0x0000,
2997 contents + rel->r_offset + 4);
2999 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3008 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3009 because such sections are not SEC_ALLOC and thus ld.so will
3010 not process them. */
3011 if (unresolved_reloc
3012 && !((input_section->flags & SEC_DEBUGGING) != 0
3014 (*_bfd_error_handler)
3015 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3018 (long) rel->r_offset,
3020 h->root.root.string);
3022 if (r_type == R_390_20
3023 || r_type == R_390_GOT20
3024 || r_type == R_390_GOTPLT20
3025 || r_type == R_390_TLS_GOTIE20)
3027 relocation += rel->r_addend;
3028 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3029 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3030 contents, rel->r_offset,
3034 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3035 contents, rel->r_offset,
3036 relocation, rel->r_addend);
3038 if (r != bfd_reloc_ok)
3043 name = h->root.root.string;
3046 name = bfd_elf_string_from_elf_section (input_bfd,
3047 symtab_hdr->sh_link,
3052 name = bfd_section_name (input_bfd, sec);
3055 if (r == bfd_reloc_overflow)
3058 if (! ((*info->callbacks->reloc_overflow)
3059 (info, (h ? &h->root : NULL), name, howto->name,
3060 (bfd_vma) 0, input_bfd, input_section,
3066 (*_bfd_error_handler)
3067 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3068 input_bfd, input_section,
3069 (long) rel->r_offset, name, (int) r);
3078 /* Finish up dynamic symbol handling. We set the contents of various
3079 dynamic sections here. */
3082 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3084 struct bfd_link_info *info;
3085 struct elf_link_hash_entry *h;
3086 Elf_Internal_Sym *sym;
3088 struct elf_s390_link_hash_table *htab;
3090 htab = elf_s390_hash_table (info);
3092 if (h->plt.offset != (bfd_vma) -1)
3096 Elf_Internal_Rela rela;
3098 bfd_vma relative_offset;
3100 /* This symbol has an entry in the procedure linkage table. Set
3102 if (h->dynindx == -1
3103 || htab->splt == NULL
3104 || htab->sgotplt == NULL
3105 || htab->srelplt == NULL)
3109 Current offset - size first entry / entry size. */
3110 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3112 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3114 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3116 /* S390 uses halfwords for relative branch calc! */
3117 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3118 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3119 /* If offset is > 32768, branch to a previous branch
3120 390 can only handle +-64 K jumps. */
3121 if ( -32768 > (int) relative_offset )
3123 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3125 /* Fill in the entry in the procedure linkage table. */
3128 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3129 htab->splt->contents + h->plt.offset);
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3131 htab->splt->contents + h->plt.offset + 4);
3132 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3133 htab->splt->contents + h->plt.offset + 8);
3134 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3135 htab->splt->contents + h->plt.offset + 12);
3136 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3137 htab->splt->contents + h->plt.offset + 16);
3138 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3139 htab->splt->contents + h->plt.offset + 20);
3140 bfd_put_32 (output_bfd,
3141 (htab->sgotplt->output_section->vma
3142 + htab->sgotplt->output_offset
3144 htab->splt->contents + h->plt.offset + 24);
3146 else if (got_offset < 4096)
3148 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3149 htab->splt->contents + h->plt.offset);
3150 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3151 htab->splt->contents + h->plt.offset + 4);
3152 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3153 htab->splt->contents + h->plt.offset + 8);
3154 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3155 htab->splt->contents + h->plt.offset + 12);
3156 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3157 htab->splt->contents + h->plt.offset + 16);
3158 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3159 htab->splt->contents + h->plt.offset + 20);
3160 bfd_put_32 (output_bfd, (bfd_vma) 0,
3161 htab->splt->contents + h->plt.offset + 24);
3163 else if (got_offset < 32768)
3165 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3166 htab->splt->contents + h->plt.offset);
3167 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3168 htab->splt->contents + h->plt.offset + 4);
3169 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3170 htab->splt->contents + h->plt.offset + 8);
3171 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3172 htab->splt->contents + h->plt.offset + 12);
3173 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3174 htab->splt->contents + h->plt.offset + 16);
3175 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3176 htab->splt->contents + h->plt.offset + 20);
3177 bfd_put_32 (output_bfd, (bfd_vma) 0,
3178 htab->splt->contents + h->plt.offset + 24);
3182 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3183 htab->splt->contents + h->plt.offset);
3184 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3185 htab->splt->contents + h->plt.offset + 4);
3186 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3187 htab->splt->contents + h->plt.offset + 8);
3188 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3189 htab->splt->contents + h->plt.offset + 12);
3190 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3191 htab->splt->contents + h->plt.offset + 16);
3192 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3193 htab->splt->contents + h->plt.offset + 20);
3194 bfd_put_32 (output_bfd, got_offset,
3195 htab->splt->contents + h->plt.offset + 24);
3197 /* Insert offset into reloc. table here. */
3198 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3199 htab->splt->contents + h->plt.offset + 28);
3201 /* Fill in the entry in the global offset table.
3202 Points to instruction after GOT offset. */
3203 bfd_put_32 (output_bfd,
3204 (htab->splt->output_section->vma
3205 + htab->splt->output_offset
3208 htab->sgotplt->contents + got_offset);
3210 /* Fill in the entry in the .rela.plt section. */
3211 rela.r_offset = (htab->sgotplt->output_section->vma
3212 + htab->sgotplt->output_offset
3214 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3216 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3217 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3219 if (!h->def_regular)
3221 /* Mark the symbol as undefined, rather than as defined in
3222 the .plt section. Leave the value alone. This is a clue
3223 for the dynamic linker, to make function pointer
3224 comparisons work between an application and shared
3226 sym->st_shndx = SHN_UNDEF;
3230 if (h->got.offset != (bfd_vma) -1
3231 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3232 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3233 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3235 Elf_Internal_Rela rela;
3238 /* This symbol has an entry in the global offset table. Set it
3241 if (htab->sgot == NULL || htab->srelgot == NULL)
3244 rela.r_offset = (htab->sgot->output_section->vma
3245 + htab->sgot->output_offset
3246 + (h->got.offset &~ (bfd_vma) 1));
3248 /* If this is a static link, or it is a -Bsymbolic link and the
3249 symbol is defined locally or was forced to be local because
3250 of a version file, we just want to emit a RELATIVE reloc.
3251 The entry in the global offset table will already have been
3252 initialized in the relocate_section function. */
3254 && SYMBOL_REFERENCES_LOCAL (info, h))
3256 if (!h->def_regular)
3258 BFD_ASSERT((h->got.offset & 1) != 0);
3259 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3260 rela.r_addend = (h->root.u.def.value
3261 + h->root.u.def.section->output_section->vma
3262 + h->root.u.def.section->output_offset);
3266 BFD_ASSERT((h->got.offset & 1) == 0);
3267 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3268 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3272 loc = htab->srelgot->contents;
3273 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3274 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3279 Elf_Internal_Rela rela;
3282 /* This symbols needs a copy reloc. Set it up. */
3284 if (h->dynindx == -1
3285 || (h->root.type != bfd_link_hash_defined
3286 && h->root.type != bfd_link_hash_defweak)
3287 || htab->srelbss == NULL)
3290 rela.r_offset = (h->root.u.def.value
3291 + h->root.u.def.section->output_section->vma
3292 + h->root.u.def.section->output_offset);
3293 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3295 loc = htab->srelbss->contents;
3296 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3297 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3300 /* Mark some specially defined symbols as absolute. */
3301 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3302 || h == htab->elf.hgot
3303 || h == htab->elf.hplt)
3304 sym->st_shndx = SHN_ABS;
3309 /* Used to decide how to sort relocs in an optimal manner for the
3310 dynamic linker, before writing them out. */
3312 static enum elf_reloc_type_class
3313 elf_s390_reloc_type_class (rela)
3314 const Elf_Internal_Rela *rela;
3316 switch ((int) ELF32_R_TYPE (rela->r_info))
3318 case R_390_RELATIVE:
3319 return reloc_class_relative;
3320 case R_390_JMP_SLOT:
3321 return reloc_class_plt;
3323 return reloc_class_copy;
3325 return reloc_class_normal;
3329 /* Finish up the dynamic sections. */
3332 elf_s390_finish_dynamic_sections (output_bfd, info)
3334 struct bfd_link_info *info;
3336 struct elf_s390_link_hash_table *htab;
3340 htab = elf_s390_hash_table (info);
3341 dynobj = htab->elf.dynobj;
3342 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3344 if (htab->elf.dynamic_sections_created)
3346 Elf32_External_Dyn *dyncon, *dynconend;
3348 if (sdyn == NULL || htab->sgot == NULL)
3351 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3352 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3353 for (; dyncon < dynconend; dyncon++)
3355 Elf_Internal_Dyn dyn;
3358 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3366 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3370 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3374 s = htab->srelplt->output_section;
3375 dyn.d_un.d_val = s->size;
3379 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3382 /* Fill in the special first entry in the procedure linkage table. */
3383 if (htab->splt && htab->splt->size > 0)
3385 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3388 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3389 htab->splt->contents );
3390 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3391 htab->splt->contents +4 );
3392 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3393 htab->splt->contents +8 );
3394 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3395 htab->splt->contents +12 );
3396 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3397 htab->splt->contents +16 );
3401 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3402 htab->splt->contents );
3403 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3404 htab->splt->contents +4 );
3405 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3406 htab->splt->contents +8 );
3407 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3408 htab->splt->contents +12 );
3409 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3410 htab->splt->contents +16 );
3411 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3412 htab->splt->contents +20 );
3413 bfd_put_32 (output_bfd,
3414 htab->sgotplt->output_section->vma
3415 + htab->sgotplt->output_offset,
3416 htab->splt->contents + 24);
3418 elf_section_data (htab->splt->output_section)
3419 ->this_hdr.sh_entsize = 4;
3426 /* Fill in the first three entries in the global offset table. */
3427 if (htab->sgotplt->size > 0)
3429 bfd_put_32 (output_bfd,
3430 (sdyn == NULL ? (bfd_vma) 0
3431 : sdyn->output_section->vma + sdyn->output_offset),
3432 htab->sgotplt->contents);
3433 /* One entry for shared object struct ptr. */
3434 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3435 /* One entry for _dl_runtime_resolve. */
3436 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3439 elf_section_data (htab->sgotplt->output_section)
3440 ->this_hdr.sh_entsize = 4;
3446 elf_s390_grok_prstatus (abfd, note)
3448 Elf_Internal_Note * note;
3453 switch (note->descsz)
3458 case 224: /* S/390 Linux. */
3460 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3463 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3471 /* Make a ".reg/999" section. */
3472 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3473 size, note->descpos + offset);
3476 /* Return address for Ith PLT stub in section PLT, for relocation REL
3477 or (bfd_vma) -1 if it should not be included. */
3480 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3481 const arelent *rel ATTRIBUTE_UNUSED)
3483 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3487 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3488 #define TARGET_BIG_NAME "elf32-s390"
3489 #define ELF_ARCH bfd_arch_s390
3490 #define ELF_MACHINE_CODE EM_S390
3491 #define ELF_MACHINE_ALT1 EM_S390_OLD
3492 #define ELF_MAXPAGESIZE 0x1000
3494 #define elf_backend_can_gc_sections 1
3495 #define elf_backend_can_refcount 1
3496 #define elf_backend_want_got_plt 1
3497 #define elf_backend_plt_readonly 1
3498 #define elf_backend_want_plt_sym 0
3499 #define elf_backend_got_header_size 12
3500 #define elf_backend_rela_normal 1
3502 #define elf_info_to_howto elf_s390_info_to_howto
3504 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3505 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3506 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3507 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3509 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3510 #define elf_backend_check_relocs elf_s390_check_relocs
3511 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3512 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3513 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3514 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3515 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3516 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3517 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3518 #define elf_backend_relocate_section elf_s390_relocate_section
3519 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3520 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3521 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3522 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3523 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3525 #define bfd_elf32_mkobject elf_s390_mkobject
3526 #define elf_backend_object_p elf_s390_object_p
3528 #include "elf32-target.h"