projects / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
S/390: ifunc: Handle GOTOFF relocs on ifunc symbols.
[binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/s390.h"
28
29 static bfd_reloc_status_type
30 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
31 asection *, bfd *, char **);
32 static bfd_reloc_status_type
33 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
34 asection *, bfd *, char **);
35
36 /* The relocation "howto" table. */
37
38 static reloc_howto_type elf_howto_table[] =
39 {
40 HOWTO (R_390_NONE, /* type */
41 0, /* rightshift */
42 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
43 0, /* bitsize */
44 FALSE, /* pc_relative */
45 0, /* bitpos */
46 complain_overflow_dont, /* complain_on_overflow */
47 bfd_elf_generic_reloc, /* special_function */
48 "R_390_NONE", /* name */
49 FALSE, /* partial_inplace */
50 0, /* src_mask */
51 0, /* dst_mask */
52 FALSE), /* pcrel_offset */
53
54 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
55 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
56 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
57 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
58 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
60 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
62 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
64 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
66 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
68 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
70 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
72 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
74 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
76 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
78 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
80 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
82 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
84 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
86 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
88 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
90 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
92 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
94 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
96 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
97 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
98 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
99 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
100 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
102 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
104 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
105 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
106 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
107 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
109 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
111 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
112 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
114 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
116 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
118 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
119 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
120 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
121 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
122 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
123 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
124 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
125 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
127 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
128 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
129 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
130 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
132 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
133 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
135 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
136 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
138 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
139 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
141 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
143 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
144 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
146 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
147 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
149 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
151 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
153 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
154 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
155 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
156 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
157 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
158 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
159 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
160 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
161 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
163 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
165 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
167 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
169 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
171 };
172
173 /* GNU extension to record C++ vtable hierarchy. */
174 static reloc_howto_type elf32_s390_vtinherit_howto =
175 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
176 static reloc_howto_type elf32_s390_vtentry_howto =
177 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);
178
179 static reloc_howto_type *
180 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
181 bfd_reloc_code_real_type code)
182 {
183 switch (code)
184 {
185 case BFD_RELOC_NONE:
186 return &elf_howto_table[(int) R_390_NONE];
187 case BFD_RELOC_8:
188 return &elf_howto_table[(int) R_390_8];
189 case BFD_RELOC_390_12:
190 return &elf_howto_table[(int) R_390_12];
191 case BFD_RELOC_16:
192 return &elf_howto_table[(int) R_390_16];
193 case BFD_RELOC_32:
194 return &elf_howto_table[(int) R_390_32];
195 case BFD_RELOC_CTOR:
196 return &elf_howto_table[(int) R_390_32];
197 case BFD_RELOC_32_PCREL:
198 return &elf_howto_table[(int) R_390_PC32];
199 case BFD_RELOC_390_GOT12:
200 return &elf_howto_table[(int) R_390_GOT12];
201 case BFD_RELOC_32_GOT_PCREL:
202 return &elf_howto_table[(int) R_390_GOT32];
203 case BFD_RELOC_390_PLT32:
204 return &elf_howto_table[(int) R_390_PLT32];
205 case BFD_RELOC_390_COPY:
206 return &elf_howto_table[(int) R_390_COPY];
207 case BFD_RELOC_390_GLOB_DAT:
208 return &elf_howto_table[(int) R_390_GLOB_DAT];
209 case BFD_RELOC_390_JMP_SLOT:
210 return &elf_howto_table[(int) R_390_JMP_SLOT];
211 case BFD_RELOC_390_RELATIVE:
212 return &elf_howto_table[(int) R_390_RELATIVE];
213 case BFD_RELOC_32_GOTOFF:
214 return &elf_howto_table[(int) R_390_GOTOFF32];
215 case BFD_RELOC_390_GOTPC:
216 return &elf_howto_table[(int) R_390_GOTPC];
217 case BFD_RELOC_390_GOT16:
218 return &elf_howto_table[(int) R_390_GOT16];
219 case BFD_RELOC_16_PCREL:
220 return &elf_howto_table[(int) R_390_PC16];
221 case BFD_RELOC_390_PC12DBL:
222 return &elf_howto_table[(int) R_390_PC12DBL];
223 case BFD_RELOC_390_PLT12DBL:
224 return &elf_howto_table[(int) R_390_PLT12DBL];
225 case BFD_RELOC_390_PC16DBL:
226 return &elf_howto_table[(int) R_390_PC16DBL];
227 case BFD_RELOC_390_PLT16DBL:
228 return &elf_howto_table[(int) R_390_PLT16DBL];
229 case BFD_RELOC_390_PC24DBL:
230 return &elf_howto_table[(int) R_390_PC24DBL];
231 case BFD_RELOC_390_PLT24DBL:
232 return &elf_howto_table[(int) R_390_PLT24DBL];
233 case BFD_RELOC_390_PC32DBL:
234 return &elf_howto_table[(int) R_390_PC32DBL];
235 case BFD_RELOC_390_PLT32DBL:
236 return &elf_howto_table[(int) R_390_PLT32DBL];
237 case BFD_RELOC_390_GOTPCDBL:
238 return &elf_howto_table[(int) R_390_GOTPCDBL];
239 case BFD_RELOC_390_GOTENT:
240 return &elf_howto_table[(int) R_390_GOTENT];
241 case BFD_RELOC_16_GOTOFF:
242 return &elf_howto_table[(int) R_390_GOTOFF16];
243 case BFD_RELOC_390_GOTPLT12:
244 return &elf_howto_table[(int) R_390_GOTPLT12];
245 case BFD_RELOC_390_GOTPLT16:
246 return &elf_howto_table[(int) R_390_GOTPLT16];
247 case BFD_RELOC_390_GOTPLT32:
248 return &elf_howto_table[(int) R_390_GOTPLT32];
249 case BFD_RELOC_390_GOTPLTENT:
250 return &elf_howto_table[(int) R_390_GOTPLTENT];
251 case BFD_RELOC_390_PLTOFF16:
252 return &elf_howto_table[(int) R_390_PLTOFF16];
253 case BFD_RELOC_390_PLTOFF32:
254 return &elf_howto_table[(int) R_390_PLTOFF32];
255 case BFD_RELOC_390_TLS_LOAD:
256 return &elf_howto_table[(int) R_390_TLS_LOAD];
257 case BFD_RELOC_390_TLS_GDCALL:
258 return &elf_howto_table[(int) R_390_TLS_GDCALL];
259 case BFD_RELOC_390_TLS_LDCALL:
260 return &elf_howto_table[(int) R_390_TLS_LDCALL];
261 case BFD_RELOC_390_TLS_GD32:
262 return &elf_howto_table[(int) R_390_TLS_GD32];
263 case BFD_RELOC_390_TLS_GOTIE12:
264 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
265 case BFD_RELOC_390_TLS_GOTIE32:
266 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
267 case BFD_RELOC_390_TLS_LDM32:
268 return &elf_howto_table[(int) R_390_TLS_LDM32];
269 case BFD_RELOC_390_TLS_IE32:
270 return &elf_howto_table[(int) R_390_TLS_IE32];
271 case BFD_RELOC_390_TLS_IEENT:
272 return &elf_howto_table[(int) R_390_TLS_IEENT];
273 case BFD_RELOC_390_TLS_LE32:
274 return &elf_howto_table[(int) R_390_TLS_LE32];
275 case BFD_RELOC_390_TLS_LDO32:
276 return &elf_howto_table[(int) R_390_TLS_LDO32];
277 case BFD_RELOC_390_TLS_DTPMOD:
278 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
279 case BFD_RELOC_390_TLS_DTPOFF:
280 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
281 case BFD_RELOC_390_TLS_TPOFF:
282 return &elf_howto_table[(int) R_390_TLS_TPOFF];
283 case BFD_RELOC_390_20:
284 return &elf_howto_table[(int) R_390_20];
285 case BFD_RELOC_390_GOT20:
286 return &elf_howto_table[(int) R_390_GOT20];
287 case BFD_RELOC_390_GOTPLT20:
288 return &elf_howto_table[(int) R_390_GOTPLT20];
289 case BFD_RELOC_390_TLS_GOTIE20:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
291 case BFD_RELOC_390_IRELATIVE:
292 return &elf_howto_table[(int) R_390_IRELATIVE];
293 case BFD_RELOC_VTABLE_INHERIT:
294 return &elf32_s390_vtinherit_howto;
295 case BFD_RELOC_VTABLE_ENTRY:
296 return &elf32_s390_vtentry_howto;
297 default:
298 break;
299 }
300 return 0;
301 }
302
303 static reloc_howto_type *
304 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
305 const char *r_name)
306 {
307 unsigned int i;
308
309 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
310 if (elf_howto_table[i].name != NULL
311 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
312 return &elf_howto_table[i];
313
314 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
315 return &elf32_s390_vtinherit_howto;
316 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
317 return &elf32_s390_vtentry_howto;
318
319 return NULL;
320 }
321
322 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
323 and elf32-s390.c has its own copy. */
324
325 static void
326 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
327 arelent *cache_ptr,
328 Elf_Internal_Rela *dst)
329 {
330 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
331 switch (r_type)
332 {
333 case R_390_GNU_VTINHERIT:
334 cache_ptr->howto = &elf32_s390_vtinherit_howto;
335 break;
336
337 case R_390_GNU_VTENTRY:
338 cache_ptr->howto = &elf32_s390_vtentry_howto;
339 break;
340
341 default:
342 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
343 {
344 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
345 abfd, (int) r_type);
346 r_type = R_390_NONE;
347 }
348 cache_ptr->howto = &elf_howto_table[r_type];
349 }
350 }
351
352 /* A relocation function which doesn't do anything. */
353 static bfd_reloc_status_type
354 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
355 arelent *reloc_entry,
356 asymbol *symbol ATTRIBUTE_UNUSED,
357 void * data ATTRIBUTE_UNUSED,
358 asection *input_section,
359 bfd *output_bfd,
360 char **error_message ATTRIBUTE_UNUSED)
361 {
362 if (output_bfd)
363 reloc_entry->address += input_section->output_offset;
364 return bfd_reloc_ok;
365 }
366
367 /* Handle the large displacement relocs. */
368 static bfd_reloc_status_type
369 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
370 arelent *reloc_entry,
371 asymbol *symbol,
372 void * data ATTRIBUTE_UNUSED,
373 asection *input_section,
374 bfd *output_bfd,
375 char **error_message ATTRIBUTE_UNUSED)
376 {
377 reloc_howto_type *howto = reloc_entry->howto;
378 bfd_vma relocation;
379 bfd_vma insn;
380
381 if (output_bfd != (bfd *) NULL
382 && (symbol->flags & BSF_SECTION_SYM) == 0
383 && (! howto->partial_inplace
384 || reloc_entry->addend == 0))
385 {
386 reloc_entry->address += input_section->output_offset;
387 return bfd_reloc_ok;
388 }
389
390 if (output_bfd != NULL)
391 return bfd_reloc_continue;
392
393 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
394 return bfd_reloc_outofrange;
395
396 relocation = (symbol->value
397 + symbol->section->output_section->vma
398 + symbol->section->output_offset);
399 relocation += reloc_entry->addend;
400 if (howto->pc_relative)
401 {
402 relocation -= (input_section->output_section->vma
403 + input_section->output_offset);
404 relocation -= reloc_entry->address;
405 }
406
407 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
408 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
409 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
410
411 if ((bfd_signed_vma) relocation < - 0x80000
412 || (bfd_signed_vma) relocation > 0x7ffff)
413 return bfd_reloc_overflow;
414 else
415 return bfd_reloc_ok;
416 }
417
418 static bfd_boolean
419 elf_s390_is_local_label_name (bfd *abfd, const char *name)
420 {
421 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
422 return TRUE;
423
424 return _bfd_elf_is_local_label_name (abfd, name);
425 }
426
427 /* Functions for the 390 ELF linker. */
428
429 /* The name of the dynamic interpreter. This is put in the .interp
430 section. */
431
432 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
433
434 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
435 copying dynamic variables from a shared lib into an app's dynbss
436 section, and instead use a dynamic relocation to point into the
437 shared lib. */
438 #define ELIMINATE_COPY_RELOCS 1
439
440 /* The size in bytes of the first entry in the procedure linkage table. */
441 #define PLT_FIRST_ENTRY_SIZE 32
442 /* The size in bytes of an entry in the procedure linkage table. */
443 #define PLT_ENTRY_SIZE 32
444
445 #define GOT_ENTRY_SIZE 4
446
447 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
448
449 /* The first three entries in a procedure linkage table are reserved,
450 and the initial contents are unimportant (we zero them out).
451 Subsequent entries look like this. See the SVR4 ABI 386
452 supplement to see how this works. */
453
454 /* For the s390, simple addr offset can only be 0 - 4096.
455 To use the full 2 GB address space, several instructions
456 are needed to load an address in a register and execute
457 a branch( or just saving the address)
458
459 Furthermore, only r 0 and 1 are free to use!!! */
460
461 /* The first 3 words in the GOT are then reserved.
462 Word 0 is the address of the dynamic table.
463 Word 1 is a pointer to a structure describing the object
464 Word 2 is used to point to the loader entry address.
465
466 The code for position independent PLT entries looks like this:
467
468 r12 holds addr of the current GOT at entry to the PLT
469
470 The GOT holds the address in the PLT to be executed.
471 The loader then gets:
472 24(15) = Pointer to the structure describing the object.
473 28(15) = Offset into rela.plt
474
475 The loader must then find the module where the function is
476 and insert the address in the GOT.
477
478 Note: 390 can only address +- 64 K relative.
479 We check if offset > 65536, then make a relative branch -64xxx
480 back to a previous defined branch
481
482 PLT1: BASR 1,0 # 2 bytes
483 L 1,22(1) # 4 bytes Load offset in GOT in r 1
484 L 1,(1,12) # 4 bytes Load address from GOT in r1
485 BCR 15,1 # 2 bytes Jump to address
486 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
487 L 1,14(1) # 4 bytes Load offset in symol table in r1
488 BRC 15,-x # 4 bytes Jump to start of PLT
489 .word 0 # 2 bytes filler
490 .long ? # 4 bytes offset in GOT
491 .long ? # 4 bytes offset into rela.plt
492
493 This was the general case. There are two additional, optimizes PLT
494 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
495 First the one for GOT offsets < 4096:
496
497 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
498 BCR 15,1 # 2 bytes Jump to address
499 .word 0,0,0 # 6 bytes filler
500 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
501 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
502 BRC 15,-x # 4 bytes Jump to start of PLT
503 .word 0,0,0 # 6 bytes filler
504 .long ? # 4 bytes offset into rela.plt
505
506 Second the one for GOT offsets < 32768:
507
508 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
509 L 1,(1,12) # 4 bytes Load address from GOT to r1
510 BCR 15,1 # 2 bytes Jump to address
511 .word 0 # 2 bytes filler
512 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
513 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
514 BRC 15,-x # 4 bytes Jump to start of PLT
515 .word 0,0,0 # 6 bytes filler
516 .long ? # 4 bytes offset into rela.plt
517
518 Total = 32 bytes per PLT entry
519
520 The code for static build PLT entries looks like this:
521
522 PLT1: BASR 1,0 # 2 bytes
523 L 1,22(1) # 4 bytes Load address of GOT entry
524 L 1,0(0,1) # 4 bytes Load address from GOT in r1
525 BCR 15,1 # 2 bytes Jump to address
526 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
527 L 1,14(1) # 4 bytes Load offset in symbol table in r1
528 BRC 15,-x # 4 bytes Jump to start of PLT
529 .word 0 # 2 bytes filler
530 .long ? # 4 bytes address of GOT entry
531 .long ? # 4 bytes offset into rela.plt */
532
533 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
534 {
535 0x0d, 0x10, /* basr %r1,%r0 */
536 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
537 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
538 0x07, 0xf1, /* br %r1 */
539 0x0d, 0x10, /* basr %r1,%r0 */
540 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
541 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
542 0x00, 0x00, /* padding */
543 0x00, 0x00, 0x00, 0x00, /* GOT offset */
544 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
545 };
546
547 /* Generic PLT pic entry. */
548 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
549 {
550 0x0d, 0x10, /* basr %r1,%r0 */
551 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
552 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
553 0x07, 0xf1, /* br %r1 */
554 0x0d, 0x10, /* basr %r1,%r0 */
555 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
556 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
557 0x00, 0x00, /* padding */
558 0x00, 0x00, 0x00, 0x00, /* GOT offset */
559 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
560 };
561
562 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
563 when generating the PLT slot with the GOT offset. */
564 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
565 {
566 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
567 0x07, 0xf1, /* br %r1 */
568 0x00, 0x00, 0x00, 0x00, /* padding */
569 0x00, 0x00,
570 0x0d, 0x10, /* basr %r1,%r0 */
571 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
572 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
573 0x00, 0x00, 0x00, 0x00,
574 0x00, 0x00, 0x00, 0x00
575 };
576
577 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
578 when generating the PLT slot with the GOT offset. */
579 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
580 {
581 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
582 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
583 0x07, 0xf1, /* br %r1 */
584 0x00, 0x00,
585 0x0d, 0x10, /* basr %r1,%r0 */
586 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
587 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
588 0x00, 0x00, 0x00, 0x00,
589 0x00, 0x00, 0x00, 0x00,
590 0x00, 0x00
591 };
592
593 /* The first PLT entry pushes the offset into the rela.plt
594 from R1 onto the stack at 8(15) and the loader object info
595 at 12(15), loads the loader address in R1 and jumps to it. */
596
597 /* The first entry in the PLT for PIC code:
598
599 PLT0:
600 ST 1,28(15) # R1 has offset into rela.plt
601 L 1,4(12) # Get loader ino(object struct address)
602 ST 1,24(15) # Store address
603 L 1,8(12) # Entry address of loader in R1
604 BR 1 # Jump to loader
605
606 The first entry in the PLT for static code:
607
608 PLT0:
609 ST 1,28(15) # R1 has offset into rela.plt
610 BASR 1,0
611 L 1,18(0,1) # Get address of GOT
612 MVC 24(4,15),4(1) # Move loader ino to stack
613 L 1,8(1) # Get address of loader
614 BR 1 # Jump to loader
615 .word 0 # filler
616 .long got # address of GOT */
617
618 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
619 {
620 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
621 0x0d, 0x10, /* basr %r1,%r0 */
622 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
623 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
624 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
625 0x07, 0xf1, /* br %r1 */
626 0x00, 0x00, 0x00, 0x00,
627 0x00, 0x00, 0x00, 0x00,
628 0x00, 0x00
629 };
630
631 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
632 {
633 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
634 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
635 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
636 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
637 0x07, 0xf1, /* br %r1 */
638 0x00, 0x00, 0x00, 0x00,
639 0x00, 0x00, 0x00, 0x00,
640 0x00, 0x00, 0x00, 0x00,
641 0x00, 0x00
642 };
643
644
645 /* s390 ELF linker hash entry. */
646
647 struct elf_s390_link_hash_entry
648 {
649 struct elf_link_hash_entry elf;
650
651 /* Track dynamic relocs copied for this symbol. */
652 struct elf_dyn_relocs *dyn_relocs;
653
654 /* Number of GOTPLT references for a function. */
655 bfd_signed_vma gotplt_refcount;
656
657 #define GOT_UNKNOWN 0
658 #define GOT_NORMAL 1
659 #define GOT_TLS_GD 2
660 #define GOT_TLS_IE 3
661 #define GOT_TLS_IE_NLT 4
662 unsigned char tls_type;
663
664 /* For pointer equality reasons we might need to change the symbol
665 type from STT_GNU_IFUNC to STT_FUNC together with its value and
666 section entry. So after alloc_dynrelocs only these values should
667 be used. In order to check whether a symbol is IFUNC use
668 s390_is_ifunc_symbol_p. */
669 bfd_vma ifunc_resolver_address;
670 asection *ifunc_resolver_section;
671 };
672
673 #define elf_s390_hash_entry(ent) \
674 ((struct elf_s390_link_hash_entry *)(ent))
675
676 /* This structure represents an entry in the local PLT list needed for
677 local IFUNC symbols. */
678 struct plt_entry
679 {
680 /* The section of the local symbol.
681 Set in relocate_section and used in finish_dynamic_sections. */
682 asection *sec;
683
684 union
685 {
686 bfd_signed_vma refcount;
687 bfd_vma offset;
688 } plt;
689 };
690
691 /* NOTE: Keep this structure in sync with
692 the one declared in elf64-s390.c. */
693 struct elf_s390_obj_tdata
694 {
695 struct elf_obj_tdata root;
696
697 /* A local PLT is needed for ifunc symbols. */
698 struct plt_entry *local_plt;
699
700 /* TLS type for each local got entry. */
701 char *local_got_tls_type;
702 };
703
704 #define elf_s390_tdata(abfd) \
705 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
706
707 #define elf_s390_local_plt(abfd) \
708 (elf_s390_tdata (abfd)->local_plt)
709
710 #define elf_s390_local_got_tls_type(abfd) \
711 (elf_s390_tdata (abfd)->local_got_tls_type)
712
713 #define is_s390_elf(bfd) \
714 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
715 && elf_tdata (bfd) != NULL \
716 && elf_object_id (bfd) == S390_ELF_DATA)
717
718 static bfd_boolean
719 elf_s390_mkobject (bfd *abfd)
720 {
721 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
722 S390_ELF_DATA);
723 }
724
725 static bfd_boolean
726 elf_s390_object_p (bfd *abfd)
727 {
728 /* Set the right machine number for an s390 elf32 file. */
729 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
730 }
731
732 /* s390 ELF linker hash table. */
733
734 struct elf_s390_link_hash_table
735 {
736 struct elf_link_hash_table elf;
737
738 /* Short-cuts to get to dynamic linker sections. */
739 asection *sdynbss;
740 asection *srelbss;
741 asection *irelifunc;
742
743 union
744 {
745 bfd_signed_vma refcount;
746 bfd_vma offset;
747 } tls_ldm_got;
748
749 /* Small local sym cache. */
750 struct sym_cache sym_cache;
751 };
752
753 /* Get the s390 ELF linker hash table from a link_info structure. */
754
755 #define elf_s390_hash_table(p) \
756 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
757 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
758
759 #undef ELF64
760 #include "elf-s390-common.c"
761
762 /* Create an entry in an s390 ELF linker hash table. */
763
764 static struct bfd_hash_entry *
765 link_hash_newfunc (struct bfd_hash_entry *entry,
766 struct bfd_hash_table *table,
767 const char *string)
768 {
769 /* Allocate the structure if it has not already been allocated by a
770 subclass. */
771 if (entry == NULL)
772 {
773 entry = bfd_hash_allocate (table,
774 sizeof (struct elf_s390_link_hash_entry));
775 if (entry == NULL)
776 return entry;
777 }
778
779 /* Call the allocation method of the superclass. */
780 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
781 if (entry != NULL)
782 {
783 struct elf_s390_link_hash_entry *eh;
784
785 eh = (struct elf_s390_link_hash_entry *) entry;
786 eh->dyn_relocs = NULL;
787 eh->gotplt_refcount = 0;
788 eh->tls_type = GOT_UNKNOWN;
789 eh->ifunc_resolver_address = 0;
790 eh->ifunc_resolver_section = NULL;
791 }
792
793 return entry;
794 }
795
796 /* Create an s390 ELF linker hash table. */
797
798 static struct bfd_link_hash_table *
799 elf_s390_link_hash_table_create (bfd *abfd)
800 {
801 struct elf_s390_link_hash_table *ret;
802 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
803
804 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
805 if (ret == NULL)
806 return NULL;
807
808 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
809 sizeof (struct elf_s390_link_hash_entry),
810 S390_ELF_DATA))
811 {
812 free (ret);
813 return NULL;
814 }
815
816 return &ret->elf.root;
817 }
818
819 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
820 shortcuts to them in our hash table. */
821
822 static bfd_boolean
823 create_got_section (bfd *dynobj, struct bfd_link_info *info)
824 {
825 struct elf_s390_link_hash_table *htab;
826
827 if (! _bfd_elf_create_got_section (dynobj, info))
828 return FALSE;
829
830 htab = elf_s390_hash_table (info);
831 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
832 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
833 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
834 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
835 abort ();
836
837 return TRUE;
838 }
839
840 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
841 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
842 hash table. */
843
844 static bfd_boolean
845 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
846 {
847 struct elf_s390_link_hash_table *htab;
848
849 htab = elf_s390_hash_table (info);
850 if (!htab->elf.sgot && !create_got_section (dynobj, info))
851 return FALSE;
852
853 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
854 return FALSE;
855
856 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
857 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
858 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
859 if (!bfd_link_pic (info))
860 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
861
862 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
863 || (!bfd_link_pic (info) && !htab->srelbss))
864 abort ();
865
866 return TRUE;
867 }
868
869 /* Copy the extra info we tack onto an elf_link_hash_entry. */
870
871 static void
872 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
873 struct elf_link_hash_entry *dir,
874 struct elf_link_hash_entry *ind)
875 {
876 struct elf_s390_link_hash_entry *edir, *eind;
877
878 edir = (struct elf_s390_link_hash_entry *) dir;
879 eind = (struct elf_s390_link_hash_entry *) ind;
880
881 if (eind->dyn_relocs != NULL)
882 {
883 if (edir->dyn_relocs != NULL)
884 {
885 struct elf_dyn_relocs **pp;
886 struct elf_dyn_relocs *p;
887
888 /* Add reloc counts against the indirect sym to the direct sym
889 list. Merge any entries against the same section. */
890 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
891 {
892 struct elf_dyn_relocs *q;
893
894 for (q = edir->dyn_relocs; q != NULL; q = q->next)
895 if (q->sec == p->sec)
896 {
897 q->pc_count += p->pc_count;
898 q->count += p->count;
899 *pp = p->next;
900 break;
901 }
902 if (q == NULL)
903 pp = &p->next;
904 }
905 *pp = edir->dyn_relocs;
906 }
907
908 edir->dyn_relocs = eind->dyn_relocs;
909 eind->dyn_relocs = NULL;
910 }
911
912 if (ind->root.type == bfd_link_hash_indirect
913 && dir->got.refcount <= 0)
914 {
915 edir->tls_type = eind->tls_type;
916 eind->tls_type = GOT_UNKNOWN;
917 }
918
919 if (ELIMINATE_COPY_RELOCS
920 && ind->root.type != bfd_link_hash_indirect
921 && dir->dynamic_adjusted)
922 {
923 /* If called to transfer flags for a weakdef during processing
924 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
925 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
926 dir->ref_dynamic |= ind->ref_dynamic;
927 dir->ref_regular |= ind->ref_regular;
928 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
929 dir->needs_plt |= ind->needs_plt;
930 }
931 else
932 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
933 }
934
935 static int
936 elf_s390_tls_transition (struct bfd_link_info *info,
937 int r_type,
938 int is_local)
939 {
940 if (bfd_link_pic (info))
941 return r_type;
942
943 switch (r_type)
944 {
945 case R_390_TLS_GD32:
946 case R_390_TLS_IE32:
947 if (is_local)
948 return R_390_TLS_LE32;
949 return R_390_TLS_IE32;
950 case R_390_TLS_GOTIE32:
951 if (is_local)
952 return R_390_TLS_LE32;
953 return R_390_TLS_GOTIE32;
954 case R_390_TLS_LDM32:
955 return R_390_TLS_LE32;
956 }
957
958 return r_type;
959 }
960
961 /* Look through the relocs for a section during the first phase, and
962 allocate space in the global offset table or procedure linkage
963 table. */
964
965 static bfd_boolean
966 elf_s390_check_relocs (bfd *abfd,
967 struct bfd_link_info *info,
968 asection *sec,
969 const Elf_Internal_Rela *relocs)
970 {
971 struct elf_s390_link_hash_table *htab;
972 Elf_Internal_Shdr *symtab_hdr;
973 struct elf_link_hash_entry **sym_hashes;
974 const Elf_Internal_Rela *rel;
975 const Elf_Internal_Rela *rel_end;
976 asection *sreloc;
977 bfd_signed_vma *local_got_refcounts;
978 int tls_type, old_tls_type;
979 Elf_Internal_Sym *isym;
980
981 if (bfd_link_relocatable (info))
982 return TRUE;
983
984 BFD_ASSERT (is_s390_elf (abfd));
985
986 htab = elf_s390_hash_table (info);
987 symtab_hdr = &elf_symtab_hdr (abfd);
988 sym_hashes = elf_sym_hashes (abfd);
989 local_got_refcounts = elf_local_got_refcounts (abfd);
990
991 sreloc = NULL;
992
993 rel_end = relocs + sec->reloc_count;
994 for (rel = relocs; rel < rel_end; rel++)
995 {
996 unsigned int r_type;
997 unsigned long r_symndx;
998 struct elf_link_hash_entry *h;
999
1000 r_symndx = ELF32_R_SYM (rel->r_info);
1001
1002 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1003 {
1004 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1005 abfd, r_symndx);
1006 return FALSE;
1007 }
1008
1009 if (r_symndx < symtab_hdr->sh_info)
1010 {
1011 /* A local symbol. */
1012 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1013 abfd, r_symndx);
1014 if (isym == NULL)
1015 return FALSE;
1016
1017 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1018 {
1019 struct plt_entry *plt;
1020
1021 if (htab->elf.dynobj == NULL)
1022 htab->elf.dynobj = abfd;
1023
1024 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1025 return FALSE;
1026
1027 if (local_got_refcounts == NULL)
1028 {
1029 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1030 return FALSE;
1031 local_got_refcounts = elf_local_got_refcounts (abfd);
1032 }
1033 plt = elf_s390_local_plt (abfd);
1034 plt[r_symndx].plt.refcount++;
1035 }
1036 h = NULL;
1037 }
1038 else
1039 {
1040 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1041 while (h->root.type == bfd_link_hash_indirect
1042 || h->root.type == bfd_link_hash_warning)
1043 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1044
1045 /* PR15323, ref flags aren't set for references in the same
1046 object. */
1047 h->root.non_ir_ref = 1;
1048 }
1049
1050 /* Create got section and local_got_refcounts array if they
1051 are needed. */
1052 r_type = elf_s390_tls_transition (info,
1053 ELF32_R_TYPE (rel->r_info),
1054 h == NULL);
1055 switch (r_type)
1056 {
1057 case R_390_GOT12:
1058 case R_390_GOT16:
1059 case R_390_GOT20:
1060 case R_390_GOT32:
1061 case R_390_GOTENT:
1062 case R_390_GOTPLT12:
1063 case R_390_GOTPLT16:
1064 case R_390_GOTPLT20:
1065 case R_390_GOTPLT32:
1066 case R_390_GOTPLTENT:
1067 case R_390_TLS_GD32:
1068 case R_390_TLS_GOTIE12:
1069 case R_390_TLS_GOTIE20:
1070 case R_390_TLS_GOTIE32:
1071 case R_390_TLS_IEENT:
1072 case R_390_TLS_IE32:
1073 case R_390_TLS_LDM32:
1074 if (h == NULL
1075 && local_got_refcounts == NULL)
1076 {
1077 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1078 return FALSE;
1079 local_got_refcounts = elf_local_got_refcounts (abfd);
1080 }
1081 /* Fall through. */
1082 case R_390_GOTOFF16:
1083 case R_390_GOTOFF32:
1084 case R_390_GOTPC:
1085 case R_390_GOTPCDBL:
1086 if (htab->elf.sgot == NULL)
1087 {
1088 if (htab->elf.dynobj == NULL)
1089 htab->elf.dynobj = abfd;
1090 if (!create_got_section (htab->elf.dynobj, info))
1091 return FALSE;
1092 }
1093 }
1094
1095 if (h != NULL)
1096 {
1097 if (htab->elf.dynobj == NULL)
1098 htab->elf.dynobj = abfd;
1099 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1100 return FALSE;
1101
1102 /* Make sure an IFUNC symbol defined in a non-shared object
1103 always gets a PLT slot. */
1104 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1105 {
1106 /* The symbol is called by the dynamic loader in order
1107 to resolve the relocation. So it is in fact also
1108 referenced. */
1109 h->ref_regular = 1;
1110 h->needs_plt = 1;
1111 }
1112 }
1113 switch (r_type)
1114 {
1115 case R_390_GOTPC:
1116 case R_390_GOTPCDBL:
1117 /* These relocs do not need a GOT slot. They just load the
1118 GOT pointer itself or address something else relative to
1119 the GOT. Since the GOT pointer has been set up above we
1120 are done. */
1121 break;
1122 case R_390_GOTOFF16:
1123 case R_390_GOTOFF32:
1124 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1125 break;
1126
1127 case R_390_PLT12DBL:
1128 case R_390_PLT16DBL:
1129 case R_390_PLT24DBL:
1130 case R_390_PLT32DBL:
1131 case R_390_PLT32:
1132 case R_390_PLTOFF16:
1133 case R_390_PLTOFF32:
1134 /* This symbol requires a procedure linkage table entry. We
1135 actually build the entry in adjust_dynamic_symbol,
1136 because this might be a case of linking PIC code which is
1137 never referenced by a dynamic object, in which case we
1138 don't need to generate a procedure linkage table entry
1139 after all. */
1140
1141 /* If this is a local symbol, we resolve it directly without
1142 creating a procedure linkage table entry. */
1143 if (h != NULL)
1144 {
1145 h->needs_plt = 1;
1146 h->plt.refcount += 1;
1147 }
1148 break;
1149
1150 case R_390_GOTPLT12:
1151 case R_390_GOTPLT16:
1152 case R_390_GOTPLT20:
1153 case R_390_GOTPLT32:
1154 case R_390_GOTPLTENT:
1155 /* This symbol requires either a procedure linkage table entry
1156 or an entry in the local got. We actually build the entry
1157 in adjust_dynamic_symbol because whether this is really a
1158 global reference can change and with it the fact if we have
1159 to create a plt entry or a local got entry. To be able to
1160 make a once global symbol a local one we have to keep track
1161 of the number of gotplt references that exist for this
1162 symbol. */
1163 if (h != NULL)
1164 {
1165 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1166 h->needs_plt = 1;
1167 h->plt.refcount += 1;
1168 }
1169 else
1170 local_got_refcounts[r_symndx] += 1;
1171 break;
1172
1173 case R_390_TLS_LDM32:
1174 htab->tls_ldm_got.refcount += 1;
1175 break;
1176
1177 case R_390_TLS_IE32:
1178 case R_390_TLS_GOTIE12:
1179 case R_390_TLS_GOTIE20:
1180 case R_390_TLS_GOTIE32:
1181 case R_390_TLS_IEENT:
1182 if (bfd_link_pic (info))
1183 info->flags |= DF_STATIC_TLS;
1184 /* Fall through. */
1185
1186 case R_390_GOT12:
1187 case R_390_GOT16:
1188 case R_390_GOT20:
1189 case R_390_GOT32:
1190 case R_390_GOTENT:
1191 case R_390_TLS_GD32:
1192 /* This symbol requires a global offset table entry. */
1193 switch (r_type)
1194 {
1195 default:
1196 case R_390_GOT12:
1197 case R_390_GOT16:
1198 case R_390_GOT20:
1199 case R_390_GOT32:
1200 case R_390_GOTENT:
1201 tls_type = GOT_NORMAL;
1202 break;
1203 case R_390_TLS_GD32:
1204 tls_type = GOT_TLS_GD;
1205 break;
1206 case R_390_TLS_IE32:
1207 case R_390_TLS_GOTIE32:
1208 tls_type = GOT_TLS_IE;
1209 break;
1210 case R_390_TLS_GOTIE12:
1211 case R_390_TLS_GOTIE20:
1212 case R_390_TLS_IEENT:
1213 tls_type = GOT_TLS_IE_NLT;
1214 break;
1215 }
1216
1217 if (h != NULL)
1218 {
1219 h->got.refcount += 1;
1220 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1221 }
1222 else
1223 {
1224 local_got_refcounts[r_symndx] += 1;
1225 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1226 }
1227 /* If a TLS symbol is accessed using IE at least once,
1228 there is no point to use dynamic model for it. */
1229 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1230 {
1231 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1232 {
1233 (*_bfd_error_handler)
1234 (_("%B: `%s' accessed both as normal and thread local symbol"),
1235 abfd, h->root.root.string);
1236 return FALSE;
1237 }
1238 if (old_tls_type > tls_type)
1239 tls_type = old_tls_type;
1240 }
1241
1242 if (old_tls_type != tls_type)
1243 {
1244 if (h != NULL)
1245 elf_s390_hash_entry (h)->tls_type = tls_type;
1246 else
1247 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1248 }
1249
1250 if (r_type != R_390_TLS_IE32)
1251 break;
1252 /* Fall through. */
1253
1254 case R_390_TLS_LE32:
1255 /* For static linking and executables this reloc will be
1256 calculated at linktime otherwise a TLS_TPOFF runtime
1257 reloc will be generated. */
1258 if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1259 break;
1260
1261 if (!bfd_link_pic (info))
1262 break;
1263 info->flags |= DF_STATIC_TLS;
1264 /* Fall through. */
1265
1266 case R_390_8:
1267 case R_390_16:
1268 case R_390_32:
1269 case R_390_PC16:
1270 case R_390_PC12DBL:
1271 case R_390_PC16DBL:
1272 case R_390_PC24DBL:
1273 case R_390_PC32DBL:
1274 case R_390_PC32:
1275 if (h != NULL)
1276 {
1277 /* If this reloc is in a read-only section, we might
1278 need a copy reloc. We can't check reliably at this
1279 stage whether the section is read-only, as input
1280 sections have not yet been mapped to output sections.
1281 Tentatively set the flag for now, and correct in
1282 adjust_dynamic_symbol. */
1283 h->non_got_ref = 1;
1284
1285 if (!bfd_link_pic (info))
1286 {
1287 /* We may need a .plt entry if the function this reloc
1288 refers to is in a shared lib. */
1289 h->plt.refcount += 1;
1290 }
1291 }
1292
1293 /* If we are creating a shared library, and this is a reloc
1294 against a global symbol, or a non PC relative reloc
1295 against a local symbol, then we need to copy the reloc
1296 into the shared library. However, if we are linking with
1297 -Bsymbolic, we do not need to copy a reloc against a
1298 global symbol which is defined in an object we are
1299 including in the link (i.e., DEF_REGULAR is set). At
1300 this point we have not seen all the input files, so it is
1301 possible that DEF_REGULAR is not set now but will be set
1302 later (it is never cleared). In case of a weak definition,
1303 DEF_REGULAR may be cleared later by a strong definition in
1304 a shared library. We account for that possibility below by
1305 storing information in the relocs_copied field of the hash
1306 table entry. A similar situation occurs when creating
1307 shared libraries and symbol visibility changes render the
1308 symbol local.
1309
1310 If on the other hand, we are creating an executable, we
1311 may need to keep relocations for symbols satisfied by a
1312 dynamic library if we manage to avoid copy relocs for the
1313 symbol. */
1314 if ((bfd_link_pic (info)
1315 && (sec->flags & SEC_ALLOC) != 0
1316 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1317 && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1318 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1319 && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1320 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1321 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1322 || (h != NULL
1323 && (! SYMBOLIC_BIND (info, h)
1324 || h->root.type == bfd_link_hash_defweak
1325 || !h->def_regular))))
1326 || (ELIMINATE_COPY_RELOCS
1327 && !bfd_link_pic (info)
1328 && (sec->flags & SEC_ALLOC) != 0
1329 && h != NULL
1330 && (h->root.type == bfd_link_hash_defweak
1331 || !h->def_regular)))
1332 {
1333 struct elf_dyn_relocs *p;
1334 struct elf_dyn_relocs **head;
1335
1336 /* We must copy these reloc types into the output file.
1337 Create a reloc section in dynobj and make room for
1338 this reloc. */
1339 if (sreloc == NULL)
1340 {
1341 if (htab->elf.dynobj == NULL)
1342 htab->elf.dynobj = abfd;
1343
1344 sreloc = _bfd_elf_make_dynamic_reloc_section
1345 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1346
1347 if (sreloc == NULL)
1348 return FALSE;
1349 }
1350
1351 /* If this is a global symbol, we count the number of
1352 relocations we need for this symbol. */
1353 if (h != NULL)
1354 {
1355 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1356 }
1357 else
1358 {
1359 /* Track dynamic relocs needed for local syms too.
1360 We really need local syms available to do this
1361 easily. Oh well. */
1362 asection *s;
1363 void *vpp;
1364
1365 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1366 abfd, r_symndx);
1367 if (isym == NULL)
1368 return FALSE;
1369
1370 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1371 if (s == NULL)
1372 s = sec;
1373
1374 vpp = &elf_section_data (s)->local_dynrel;
1375 head = (struct elf_dyn_relocs **) vpp;
1376 }
1377
1378 p = *head;
1379 if (p == NULL || p->sec != sec)
1380 {
1381 bfd_size_type amt = sizeof *p;
1382
1383 p = ((struct elf_dyn_relocs *)
1384 bfd_alloc (htab->elf.dynobj, amt));
1385 if (p == NULL)
1386 return FALSE;
1387 p->next = *head;
1388 *head = p;
1389 p->sec = sec;
1390 p->count = 0;
1391 p->pc_count = 0;
1392 }
1393
1394 p->count += 1;
1395 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1396 || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1397 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1398 || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1399 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1400 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1401 p->pc_count += 1;
1402 }
1403 break;
1404
1405 /* This relocation describes the C++ object vtable hierarchy.
1406 Reconstruct it for later use during GC. */
1407 case R_390_GNU_VTINHERIT:
1408 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1409 return FALSE;
1410 break;
1411
1412 /* This relocation describes which C++ vtable entries are actually
1413 used. Record for later use during GC. */
1414 case R_390_GNU_VTENTRY:
1415 BFD_ASSERT (h != NULL);
1416 if (h != NULL
1417 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1418 return FALSE;
1419 break;
1420
1421 default:
1422 break;
1423 }
1424 }
1425
1426 return TRUE;
1427 }
1428
1429 /* Return the section that should be marked against GC for a given
1430 relocation. */
1431
1432 static asection *
1433 elf_s390_gc_mark_hook (asection *sec,
1434 struct bfd_link_info *info,
1435 Elf_Internal_Rela *rel,
1436 struct elf_link_hash_entry *h,
1437 Elf_Internal_Sym *sym)
1438 {
1439 if (h != NULL)
1440 switch (ELF32_R_TYPE (rel->r_info))
1441 {
1442 case R_390_GNU_VTINHERIT:
1443 case R_390_GNU_VTENTRY:
1444 return NULL;
1445 }
1446 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1447
1448 }
1449
1450 /* Update the got entry reference counts for the section being removed. */
1451
1452 static bfd_boolean
1453 elf_s390_gc_sweep_hook (bfd *abfd,
1454 struct bfd_link_info *info,
1455 asection *sec,
1456 const Elf_Internal_Rela *relocs)
1457 {
1458 struct elf_s390_link_hash_table *htab;
1459 Elf_Internal_Shdr *symtab_hdr;
1460 struct elf_link_hash_entry **sym_hashes;
1461 bfd_signed_vma *local_got_refcounts;
1462 const Elf_Internal_Rela *rel, *relend;
1463
1464 if (bfd_link_relocatable (info))
1465 return TRUE;
1466
1467 htab = elf_s390_hash_table (info);
1468 if (htab == NULL)
1469 return FALSE;
1470
1471 elf_section_data (sec)->local_dynrel = NULL;
1472
1473 symtab_hdr = &elf_symtab_hdr (abfd);
1474 sym_hashes = elf_sym_hashes (abfd);
1475 local_got_refcounts = elf_local_got_refcounts (abfd);
1476
1477 relend = relocs + sec->reloc_count;
1478 for (rel = relocs; rel < relend; rel++)
1479 {
1480 unsigned long r_symndx;
1481 unsigned int r_type;
1482 struct elf_link_hash_entry *h = NULL;
1483
1484 r_symndx = ELF32_R_SYM (rel->r_info);
1485 if (r_symndx >= symtab_hdr->sh_info)
1486 {
1487 struct elf_s390_link_hash_entry *eh;
1488 struct elf_dyn_relocs **pp;
1489 struct elf_dyn_relocs *p;
1490
1491 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1492 while (h->root.type == bfd_link_hash_indirect
1493 || h->root.type == bfd_link_hash_warning)
1494 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1495 eh = (struct elf_s390_link_hash_entry *) h;
1496
1497 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1498 if (p->sec == sec)
1499 {
1500 /* Everything must go for SEC. */
1501 *pp = p->next;
1502 break;
1503 }
1504 }
1505 else
1506 {
1507 Elf_Internal_Sym *isym;
1508
1509 /* A local symbol. */
1510 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1511 abfd, r_symndx);
1512 if (isym == NULL)
1513 return FALSE;
1514
1515 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1516 {
1517 struct plt_entry *plt = elf_s390_local_plt (abfd);
1518 if (plt[r_symndx].plt.refcount > 0)
1519 plt[r_symndx].plt.refcount--;
1520 }
1521 }
1522
1523 r_type = ELF32_R_TYPE (rel->r_info);
1524 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1525 switch (r_type)
1526 {
1527 case R_390_TLS_LDM32:
1528 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1529 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1530 break;
1531
1532 case R_390_GOTOFF16:
1533 case R_390_GOTOFF32:
1534 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1535 {
1536 h->plt.refcount--;
1537 break;
1538 }
1539
1540 case R_390_GOTPC:
1541 case R_390_GOTPCDBL:
1542 break;
1543
1544 case R_390_TLS_GD32:
1545 case R_390_TLS_IE32:
1546 case R_390_TLS_GOTIE12:
1547 case R_390_TLS_GOTIE20:
1548 case R_390_TLS_GOTIE32:
1549 case R_390_TLS_IEENT:
1550 case R_390_GOT12:
1551 case R_390_GOT16:
1552 case R_390_GOT20:
1553 case R_390_GOT32:
1554 case R_390_GOTENT:
1555 if (h != NULL)
1556 {
1557 if (h->got.refcount > 0)
1558 h->got.refcount -= 1;
1559 }
1560 else if (local_got_refcounts != NULL)
1561 {
1562 if (local_got_refcounts[r_symndx] > 0)
1563 local_got_refcounts[r_symndx] -= 1;
1564 }
1565 break;
1566
1567 case R_390_8:
1568 case R_390_12:
1569 case R_390_16:
1570 case R_390_20:
1571 case R_390_32:
1572 case R_390_PC16:
1573 case R_390_PC12DBL:
1574 case R_390_PC16DBL:
1575 case R_390_PC24DBL:
1576 case R_390_PC32DBL:
1577 case R_390_PC32:
1578 if (bfd_link_pic (info))
1579 break;
1580 /* Fall through. */
1581
1582 case R_390_PLT12DBL:
1583 case R_390_PLT16DBL:
1584 case R_390_PLT24DBL:
1585 case R_390_PLT32DBL:
1586 case R_390_PLT32:
1587 case R_390_PLTOFF16:
1588 case R_390_PLTOFF32:
1589 if (h != NULL)
1590 {
1591 if (h->plt.refcount > 0)
1592 h->plt.refcount -= 1;
1593 }
1594 break;
1595
1596 case R_390_GOTPLT12:
1597 case R_390_GOTPLT16:
1598 case R_390_GOTPLT20:
1599 case R_390_GOTPLT32:
1600 case R_390_GOTPLTENT:
1601 if (h != NULL)
1602 {
1603 if (h->plt.refcount > 0)
1604 {
1605 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1606 h->plt.refcount -= 1;
1607 }
1608 }
1609 else if (local_got_refcounts != NULL)
1610 {
1611 if (local_got_refcounts[r_symndx] > 0)
1612 local_got_refcounts[r_symndx] -= 1;
1613 }
1614 break;
1615
1616 default:
1617 break;
1618 }
1619 }
1620
1621 return TRUE;
1622 }
1623
1624 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1625 entry but we found we will not create any. Called when we find we will
1626 not have any PLT for this symbol, by for example
1627 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1628 or elf_s390_size_dynamic_sections if no dynamic sections will be
1629 created (we're only linking static objects). */
1630
1631 static void
1632 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1633 {
1634 if (h->elf.root.type == bfd_link_hash_warning)
1635 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1636
1637 if (h->gotplt_refcount <= 0)
1638 return;
1639
1640 /* We simply add the number of gotplt references to the number
1641 * of got references for this symbol. */
1642 h->elf.got.refcount += h->gotplt_refcount;
1643 h->gotplt_refcount = -1;
1644 }
1645
1646 /* Adjust a symbol defined by a dynamic object and referenced by a
1647 regular object. The current definition is in some section of the
1648 dynamic object, but we're not including those sections. We have to
1649 change the definition to something the rest of the link can
1650 understand. */
1651
1652 static bfd_boolean
1653 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1654 struct elf_link_hash_entry *h)
1655 {
1656 struct elf_s390_link_hash_table *htab;
1657 asection *s;
1658
1659 /* STT_GNU_IFUNC symbol must go through PLT. */
1660 if (s390_is_ifunc_symbol_p (h))
1661 return TRUE;
1662
1663 /* If this is a function, put it in the procedure linkage table. We
1664 will fill in the contents of the procedure linkage table later
1665 (although we could actually do it here). */
1666 if (h->type == STT_FUNC
1667 || h->needs_plt)
1668 {
1669 if (h->plt.refcount <= 0
1670 || SYMBOL_CALLS_LOCAL (info, h)
1671 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1672 && h->root.type != bfd_link_hash_undefweak))
1673 {
1674 /* This case can occur if we saw a PLT32 reloc in an input
1675 file, but the symbol was never referred to by a dynamic
1676 object, or if all references were garbage collected. In
1677 such a case, we don't actually need to build a procedure
1678 linkage table, and we can just do a PC32 reloc instead. */
1679 h->plt.offset = (bfd_vma) -1;
1680 h->needs_plt = 0;
1681 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1682 }
1683
1684 return TRUE;
1685 }
1686 else
1687 /* It's possible that we incorrectly decided a .plt reloc was
1688 needed for an R_390_PC32 reloc to a non-function sym in
1689 check_relocs. We can't decide accurately between function and
1690 non-function syms in check-relocs; Objects loaded later in
1691 the link may change h->type. So fix it now. */
1692 h->plt.offset = (bfd_vma) -1;
1693
1694 /* If this is a weak symbol, and there is a real definition, the
1695 processor independent code will have arranged for us to see the
1696 real definition first, and we can just use the same value. */
1697 if (h->u.weakdef != NULL)
1698 {
1699 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1700 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1701 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1702 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1703 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1704 h->non_got_ref = h->u.weakdef->non_got_ref;
1705 return TRUE;
1706 }
1707
1708 /* This is a reference to a symbol defined by a dynamic object which
1709 is not a function. */
1710
1711 /* If we are creating a shared library, we must presume that the
1712 only references to the symbol are via the global offset table.
1713 For such cases we need not do anything here; the relocations will
1714 be handled correctly by relocate_section. */
1715 if (bfd_link_pic (info))
1716 return TRUE;
1717
1718 /* If there are no references to this symbol that do not use the
1719 GOT, we don't need to generate a copy reloc. */
1720 if (!h->non_got_ref)
1721 return TRUE;
1722
1723 /* If -z nocopyreloc was given, we won't generate them either. */
1724 if (info->nocopyreloc)
1725 {
1726 h->non_got_ref = 0;
1727 return TRUE;
1728 }
1729
1730 if (ELIMINATE_COPY_RELOCS)
1731 {
1732 struct elf_s390_link_hash_entry * eh;
1733 struct elf_dyn_relocs *p;
1734
1735 eh = (struct elf_s390_link_hash_entry *) h;
1736 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1737 {
1738 s = p->sec->output_section;
1739 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1740 break;
1741 }
1742
1743 /* If we didn't find any dynamic relocs in read-only sections, then
1744 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1745 if (p == NULL)
1746 {
1747 h->non_got_ref = 0;
1748 return TRUE;
1749 }
1750 }
1751
1752 /* We must allocate the symbol in our .dynbss section, which will
1753 become part of the .bss section of the executable. There will be
1754 an entry for this symbol in the .dynsym section. The dynamic
1755 object will contain position independent code, so all references
1756 from the dynamic object to this symbol will go through the global
1757 offset table. The dynamic linker will use the .dynsym entry to
1758 determine the address it must put in the global offset table, so
1759 both the dynamic object and the regular object will refer to the
1760 same memory location for the variable. */
1761
1762 htab = elf_s390_hash_table (info);
1763
1764 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1765 copy the initial value out of the dynamic object and into the
1766 runtime process image. */
1767 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1768 {
1769 htab->srelbss->size += sizeof (Elf32_External_Rela);
1770 h->needs_copy = 1;
1771 }
1772
1773 s = htab->sdynbss;
1774
1775 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1776 }
1777
1778 /* Allocate space in .plt, .got and associated reloc sections for
1779 dynamic relocs. */
1780
1781 static bfd_boolean
1782 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1783 {
1784 struct bfd_link_info *info;
1785 struct elf_s390_link_hash_table *htab;
1786 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1787 struct elf_dyn_relocs *p;
1788
1789 if (h->root.type == bfd_link_hash_indirect)
1790 return TRUE;
1791
1792 info = (struct bfd_link_info *) inf;
1793 htab = elf_s390_hash_table (info);
1794
1795 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1796 here if it is defined and referenced in a non-shared object. */
1797 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1798 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1799 else if (htab->elf.dynamic_sections_created
1800 && h->plt.refcount > 0)
1801 {
1802 /* Make sure this symbol is output as a dynamic symbol.
1803 Undefined weak syms won't yet be marked as dynamic. */
1804 if (h->dynindx == -1
1805 && !h->forced_local)
1806 {
1807 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1808 return FALSE;
1809 }
1810
1811 if (bfd_link_pic (info)
1812 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1813 {
1814 asection *s = htab->elf.splt;
1815
1816 /* If this is the first .plt entry, make room for the special
1817 first entry. */
1818 if (s->size == 0)
1819 s->size += PLT_FIRST_ENTRY_SIZE;
1820
1821 h->plt.offset = s->size;
1822
1823 /* If this symbol is not defined in a regular file, and we are
1824 not generating a shared library, then set the symbol to this
1825 location in the .plt. This is required to make function
1826 pointers compare as equal between the normal executable and
1827 the shared library. */
1828 if (! bfd_link_pic (info)
1829 && !h->def_regular)
1830 {
1831 h->root.u.def.section = s;
1832 h->root.u.def.value = h->plt.offset;
1833 }
1834
1835 /* Make room for this entry. */
1836 s->size += PLT_ENTRY_SIZE;
1837
1838 /* We also need to make an entry in the .got.plt section, which
1839 will be placed in the .got section by the linker script. */
1840 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1841
1842 /* We also need to make an entry in the .rela.plt section. */
1843 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1844 }
1845 else
1846 {
1847 h->plt.offset = (bfd_vma) -1;
1848 h->needs_plt = 0;
1849 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1850 }
1851 }
1852 else
1853 {
1854 h->plt.offset = (bfd_vma) -1;
1855 h->needs_plt = 0;
1856 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1857 }
1858
1859 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1860 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1861 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1862 we can save the dynamic TLS relocation. */
1863 if (h->got.refcount > 0
1864 && !bfd_link_pic (info)
1865 && h->dynindx == -1
1866 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1867 {
1868 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1869 /* For the GOTIE access without a literal pool entry the offset has
1870 to be stored somewhere. The immediate value in the instruction
1871 is not bit enough so the value is stored in the got. */
1872 {
1873 h->got.offset = htab->elf.sgot->size;
1874 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1875 }
1876 else
1877 h->got.offset = (bfd_vma) -1;
1878 }
1879 else if (h->got.refcount > 0)
1880 {
1881 asection *s;
1882 bfd_boolean dyn;
1883 int tls_type = elf_s390_hash_entry(h)->tls_type;
1884
1885 /* Make sure this symbol is output as a dynamic symbol.
1886 Undefined weak syms won't yet be marked as dynamic. */
1887 if (h->dynindx == -1
1888 && !h->forced_local)
1889 {
1890 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1891 return FALSE;
1892 }
1893
1894 s = htab->elf.sgot;
1895 h->got.offset = s->size;
1896 s->size += GOT_ENTRY_SIZE;
1897 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1898 if (tls_type == GOT_TLS_GD)
1899 s->size += GOT_ENTRY_SIZE;
1900 dyn = htab->elf.dynamic_sections_created;
1901 /* R_390_TLS_IE32 needs one dynamic relocation,
1902 R_390_TLS_GD32 needs one if local symbol and two if global. */
1903 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1904 || tls_type >= GOT_TLS_IE)
1905 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1906 else if (tls_type == GOT_TLS_GD)
1907 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1908 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1909 || h->root.type != bfd_link_hash_undefweak)
1910 && (bfd_link_pic (info)
1911 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1912 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1913 }
1914 else
1915 h->got.offset = (bfd_vma) -1;
1916
1917 if (eh->dyn_relocs == NULL)
1918 return TRUE;
1919
1920 /* In the shared -Bsymbolic case, discard space allocated for
1921 dynamic pc-relative relocs against symbols which turn out to be
1922 defined in regular objects. For the normal shared case, discard
1923 space for pc-relative relocs that have become local due to symbol
1924 visibility changes. */
1925
1926 if (bfd_link_pic (info))
1927 {
1928 if (SYMBOL_CALLS_LOCAL (info, h))
1929 {
1930 struct elf_dyn_relocs **pp;
1931
1932 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1933 {
1934 p->count -= p->pc_count;
1935 p->pc_count = 0;
1936 if (p->count == 0)
1937 *pp = p->next;
1938 else
1939 pp = &p->next;
1940 }
1941 }
1942
1943 /* Also discard relocs on undefined weak syms with non-default
1944 visibility. */
1945 if (eh->dyn_relocs != NULL
1946 && h->root.type == bfd_link_hash_undefweak)
1947 {
1948 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1949 eh->dyn_relocs = NULL;
1950
1951 /* Make sure undefined weak symbols are output as a dynamic
1952 symbol in PIEs. */
1953 else if (h->dynindx == -1
1954 && !h->forced_local)
1955 {
1956 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1957 return FALSE;
1958 }
1959 }
1960 }
1961 else if (ELIMINATE_COPY_RELOCS)
1962 {
1963 /* For the non-shared case, discard space for relocs against
1964 symbols which turn out to need copy relocs or are not
1965 dynamic. */
1966
1967 if (!h->non_got_ref
1968 && ((h->def_dynamic
1969 && !h->def_regular)
1970 || (htab->elf.dynamic_sections_created
1971 && (h->root.type == bfd_link_hash_undefweak
1972 || h->root.type == bfd_link_hash_undefined))))
1973 {
1974 /* Make sure this symbol is output as a dynamic symbol.
1975 Undefined weak syms won't yet be marked as dynamic. */
1976 if (h->dynindx == -1
1977 && !h->forced_local)
1978 {
1979 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1980 return FALSE;
1981 }
1982
1983 /* If that succeeded, we know we'll be keeping all the
1984 relocs. */
1985 if (h->dynindx != -1)
1986 goto keep;
1987 }
1988
1989 eh->dyn_relocs = NULL;
1990
1991 keep: ;
1992 }
1993
1994 /* Finally, allocate space. */
1995 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1996 {
1997 asection *sreloc = elf_section_data (p->sec)->sreloc;
1998
1999 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2000 }
2001
2002 return TRUE;
2003 }
2004
2005 /* Find any dynamic relocs that apply to read-only sections. */
2006
2007 static bfd_boolean
2008 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2009 {
2010 struct elf_s390_link_hash_entry *eh;
2011 struct elf_dyn_relocs *p;
2012
2013 eh = (struct elf_s390_link_hash_entry *) h;
2014 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2015 {
2016 asection *s = p->sec->output_section;
2017
2018 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2019 {
2020 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2021
2022 info->flags |= DF_TEXTREL;
2023
2024 /* Not an error, just cut short the traversal. */
2025 return FALSE;
2026 }
2027 }
2028 return TRUE;
2029 }
2030
2031 /* Set the sizes of the dynamic sections. */
2032
2033 static bfd_boolean
2034 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2035 struct bfd_link_info *info)
2036 {
2037 struct elf_s390_link_hash_table *htab;
2038 bfd *dynobj;
2039 asection *s;
2040 bfd_boolean relocs;
2041 bfd *ibfd;
2042
2043 htab = elf_s390_hash_table (info);
2044 dynobj = htab->elf.dynobj;
2045 if (dynobj == NULL)
2046 abort ();
2047
2048 if (htab->elf.dynamic_sections_created)
2049 {
2050 /* Set the contents of the .interp section to the interpreter. */
2051 if (bfd_link_executable (info) && !info->nointerp)
2052 {
2053 s = bfd_get_linker_section (dynobj, ".interp");
2054 if (s == NULL)
2055 abort ();
2056 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2057 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2058 }
2059 }
2060
2061 /* Set up .got offsets for local syms, and space for local dynamic
2062 relocs. */
2063 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2064 {
2065 bfd_signed_vma *local_got;
2066 bfd_signed_vma *end_local_got;
2067 char *local_tls_type;
2068 bfd_size_type locsymcount;
2069 Elf_Internal_Shdr *symtab_hdr;
2070 asection *srela;
2071 struct plt_entry *local_plt;
2072 unsigned int i;
2073
2074 if (! is_s390_elf (ibfd))
2075 continue;
2076
2077 for (s = ibfd->sections; s != NULL; s = s->next)
2078 {
2079 struct elf_dyn_relocs *p;
2080
2081 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2082 {
2083 if (!bfd_is_abs_section (p->sec)
2084 && bfd_is_abs_section (p->sec->output_section))
2085 {
2086 /* Input section has been discarded, either because
2087 it is a copy of a linkonce section or due to
2088 linker script /DISCARD/, so we'll be discarding
2089 the relocs too. */
2090 }
2091 else if (p->count != 0)
2092 {
2093 srela = elf_section_data (p->sec)->sreloc;
2094 srela->size += p->count * sizeof (Elf32_External_Rela);
2095 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2096 info->flags |= DF_TEXTREL;
2097 }
2098 }
2099 }
2100
2101 local_got = elf_local_got_refcounts (ibfd);
2102 if (!local_got)
2103 continue;
2104
2105 symtab_hdr = &elf_symtab_hdr (ibfd);
2106 locsymcount = symtab_hdr->sh_info;
2107 end_local_got = local_got + locsymcount;
2108 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2109 s = htab->elf.sgot;
2110 srela = htab->elf.srelgot;
2111 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2112 {
2113 if (*local_got > 0)
2114 {
2115 *local_got = s->size;
2116 s->size += GOT_ENTRY_SIZE;
2117 if (*local_tls_type == GOT_TLS_GD)
2118 s->size += GOT_ENTRY_SIZE;
2119 if (bfd_link_pic (info))
2120 srela->size += sizeof (Elf32_External_Rela);
2121 }
2122 else
2123 *local_got = (bfd_vma) -1;
2124 }
2125 local_plt = elf_s390_local_plt (ibfd);
2126 for (i = 0; i < symtab_hdr->sh_info; i++)
2127 {
2128 if (local_plt[i].plt.refcount > 0)
2129 {
2130 local_plt[i].plt.offset = htab->elf.iplt->size;
2131 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2132 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2133 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2134 }
2135 else
2136 local_plt[i].plt.offset = (bfd_vma) -1;
2137 }
2138 }
2139
2140 if (htab->tls_ldm_got.refcount > 0)
2141 {
2142 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2143 relocs. */
2144 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2145 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2146 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2147 }
2148 else
2149 htab->tls_ldm_got.offset = -1;
2150
2151 /* Allocate global sym .plt and .got entries, and space for global
2152 sym dynamic relocs. */
2153 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2154
2155 /* We now have determined the sizes of the various dynamic sections.
2156 Allocate memory for them. */
2157 relocs = FALSE;
2158 for (s = dynobj->sections; s != NULL; s = s->next)
2159 {
2160 if ((s->flags & SEC_LINKER_CREATED) == 0)
2161 continue;
2162
2163 if (s == htab->elf.splt
2164 || s == htab->elf.sgot
2165 || s == htab->elf.sgotplt
2166 || s == htab->sdynbss
2167 || s == htab->elf.iplt
2168 || s == htab->elf.igotplt
2169 || s == htab->irelifunc)
2170 {
2171 /* Strip this section if we don't need it; see the
2172 comment below. */
2173 }
2174 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2175 {
2176 if (s->size != 0)
2177 relocs = TRUE;
2178
2179 /* We use the reloc_count field as a counter if we need
2180 to copy relocs into the output file. */
2181 s->reloc_count = 0;
2182 }
2183 else
2184 {
2185 /* It's not one of our sections, so don't allocate space. */
2186 continue;
2187 }
2188
2189 if (s->size == 0)
2190 {
2191 /* If we don't need this section, strip it from the
2192 output file. This is to handle .rela.bss and
2193 .rela.plt. We must create it in
2194 create_dynamic_sections, because it must be created
2195 before the linker maps input sections to output
2196 sections. The linker does that before
2197 adjust_dynamic_symbol is called, and it is that
2198 function which decides whether anything needs to go
2199 into these sections. */
2200
2201 s->flags |= SEC_EXCLUDE;
2202 continue;
2203 }
2204
2205 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2206 continue;
2207
2208 /* Allocate memory for the section contents. We use bfd_zalloc
2209 here in case unused entries are not reclaimed before the
2210 section's contents are written out. This should not happen,
2211 but this way if it does, we get a R_390_NONE reloc instead
2212 of garbage. */
2213 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2214 if (s->contents == NULL)
2215 return FALSE;
2216 }
2217
2218 if (htab->elf.dynamic_sections_created)
2219 {
2220 /* Add some entries to the .dynamic section. We fill in the
2221 values later, in elf_s390_finish_dynamic_sections, but we
2222 must add the entries now so that we get the correct size for
2223 the .dynamic section. The DT_DEBUG entry is filled in by the
2224 dynamic linker and used by the debugger. */
2225 #define add_dynamic_entry(TAG, VAL) \
2226 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2227
2228 if (bfd_link_executable (info))
2229 {
2230 if (!add_dynamic_entry (DT_DEBUG, 0))
2231 return FALSE;
2232 }
2233
2234 if (htab->elf.splt->size != 0)
2235 {
2236 if (!add_dynamic_entry (DT_PLTGOT, 0)
2237 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2238 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2239 || !add_dynamic_entry (DT_JMPREL, 0))
2240 return FALSE;
2241 }
2242
2243 if (relocs)
2244 {
2245 if (!add_dynamic_entry (DT_RELA, 0)
2246 || !add_dynamic_entry (DT_RELASZ, 0)
2247 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2248 return FALSE;
2249
2250 /* If any dynamic relocs apply to a read-only section,
2251 then we need a DT_TEXTREL entry. */
2252 if ((info->flags & DF_TEXTREL) == 0)
2253 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2254
2255 if ((info->flags & DF_TEXTREL) != 0)
2256 {
2257 if (!add_dynamic_entry (DT_TEXTREL, 0))
2258 return FALSE;
2259 }
2260 }
2261 }
2262 #undef add_dynamic_entry
2263
2264 return TRUE;
2265 }
2266
2267 /* Return the base VMA address which should be subtracted from real addresses
2268 when resolving @dtpoff relocation.
2269 This is PT_TLS segment p_vaddr. */
2270
2271 static bfd_vma
2272 dtpoff_base (struct bfd_link_info *info)
2273 {
2274 /* If tls_sec is NULL, we should have signalled an error already. */
2275 if (elf_hash_table (info)->tls_sec == NULL)
2276 return 0;
2277 return elf_hash_table (info)->tls_sec->vma;
2278 }
2279
2280 /* Return the relocation value for @tpoff relocation
2281 if STT_TLS virtual address is ADDRESS. */
2282
2283 static bfd_vma
2284 tpoff (struct bfd_link_info *info, bfd_vma address)
2285 {
2286 struct elf_link_hash_table *htab = elf_hash_table (info);
2287
2288 /* If tls_sec is NULL, we should have signalled an error already. */
2289 if (htab->tls_sec == NULL)
2290 return 0;
2291 return htab->tls_size + htab->tls_sec->vma - address;
2292 }
2293
2294 /* Complain if TLS instruction relocation is against an invalid
2295 instruction. */
2296
2297 static void
2298 invalid_tls_insn (bfd *input_bfd,
2299 asection *input_section,
2300 Elf_Internal_Rela *rel)
2301 {
2302 reloc_howto_type *howto;
2303
2304 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2305 (*_bfd_error_handler)
2306 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2307 input_bfd,
2308 input_section,
2309 (long) rel->r_offset,
2310 howto->name);
2311 bfd_set_error (bfd_error_bad_value);
2312 }
2313
2314 /* Relocate a 390 ELF section. */
2315
2316 static bfd_boolean
2317 elf_s390_relocate_section (bfd *output_bfd,
2318 struct bfd_link_info *info,
2319 bfd *input_bfd,
2320 asection *input_section,
2321 bfd_byte *contents,
2322 Elf_Internal_Rela *relocs,
2323 Elf_Internal_Sym *local_syms,
2324 asection **local_sections)
2325 {
2326 struct elf_s390_link_hash_table *htab;
2327 Elf_Internal_Shdr *symtab_hdr;
2328 struct elf_link_hash_entry **sym_hashes;
2329 bfd_vma *local_got_offsets;
2330 Elf_Internal_Rela *rel;
2331 Elf_Internal_Rela *relend;
2332
2333 BFD_ASSERT (is_s390_elf (input_bfd));
2334
2335 htab = elf_s390_hash_table (info);
2336 symtab_hdr = &elf_symtab_hdr (input_bfd);
2337 sym_hashes = elf_sym_hashes (input_bfd);
2338 local_got_offsets = elf_local_got_offsets (input_bfd);
2339
2340 rel = relocs;
2341 relend = relocs + input_section->reloc_count;
2342 for (; rel < relend; rel++)
2343 {
2344 unsigned int r_type;
2345 reloc_howto_type *howto;
2346 unsigned long r_symndx;
2347 struct elf_link_hash_entry *h;
2348 Elf_Internal_Sym *sym;
2349 asection *sec;
2350 bfd_vma off;
2351 bfd_vma relocation;
2352 bfd_boolean unresolved_reloc;
2353 bfd_reloc_status_type r;
2354 int tls_type;
2355 asection *base_got = htab->elf.sgot;
2356
2357 r_type = ELF32_R_TYPE (rel->r_info);
2358 if (r_type == (int) R_390_GNU_VTINHERIT
2359 || r_type == (int) R_390_GNU_VTENTRY)
2360 continue;
2361 if (r_type >= (int) R_390_max)
2362 {
2363 bfd_set_error (bfd_error_bad_value);
2364 return FALSE;
2365 }
2366
2367 howto = elf_howto_table + r_type;
2368 r_symndx = ELF32_R_SYM (rel->r_info);
2369
2370 h = NULL;
2371 sym = NULL;
2372 sec = NULL;
2373 unresolved_reloc = FALSE;
2374 if (r_symndx < symtab_hdr->sh_info)
2375 {
2376 sym = local_syms + r_symndx;
2377 sec = local_sections[r_symndx];
2378 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2379 {
2380 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2381 if (local_plt == NULL)
2382 return FALSE;
2383
2384 /* Address of the PLT slot. */
2385 relocation = (htab->elf.iplt->output_section->vma
2386 + htab->elf.iplt->output_offset
2387 + local_plt[r_symndx].plt.offset);
2388
2389 switch (r_type)
2390 {
2391 case R_390_PLTOFF16:
2392 case R_390_PLTOFF32:
2393 relocation -= htab->elf.sgot->output_section->vma;
2394 break;
2395 case R_390_GOTPLT12:
2396 case R_390_GOTPLT16:
2397 case R_390_GOTPLT20:
2398 case R_390_GOTPLT32:
2399 case R_390_GOTPLTENT:
2400 case R_390_GOT12:
2401 case R_390_GOT16:
2402 case R_390_GOT20:
2403 case R_390_GOT32:
2404 case R_390_GOTENT:
2405 {
2406 /* Write the PLT slot address into the GOT slot. */
2407 bfd_put_32 (output_bfd, relocation,
2408 htab->elf.sgot->contents +
2409 local_got_offsets[r_symndx]);
2410 relocation = (local_got_offsets[r_symndx] +
2411 htab->elf.sgot->output_offset);
2412
2413 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2414 relocation += htab->elf.sgot->output_section->vma;
2415 break;
2416 }
2417 default:
2418 break;
2419 }
2420 /* The output section is needed later in
2421 finish_dynamic_section when creating the dynamic
2422 relocation. */
2423 local_plt[r_symndx].sec = sec;
2424 goto do_relocation;
2425 }
2426 else
2427 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2428 }
2429 else
2430 {
2431 bfd_boolean warned ATTRIBUTE_UNUSED;
2432 bfd_boolean ignored ATTRIBUTE_UNUSED;
2433
2434 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2435 r_symndx, symtab_hdr, sym_hashes,
2436 h, sec, relocation,
2437 unresolved_reloc, warned, ignored);
2438 }
2439
2440 if (sec != NULL && discarded_section (sec))
2441 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2442 rel, 1, relend, howto, 0, contents);
2443
2444 if (bfd_link_relocatable (info))
2445 continue;
2446
2447 switch (r_type)
2448 {
2449 case R_390_GOTPLT12:
2450 case R_390_GOTPLT16:
2451 case R_390_GOTPLT20:
2452 case R_390_GOTPLT32:
2453 case R_390_GOTPLTENT:
2454 /* There are three cases for a GOTPLT relocation. 1) The
2455 relocation is against the jump slot entry of a plt that
2456 will get emitted to the output file. 2) The relocation
2457 is against the jump slot of a plt entry that has been
2458 removed. elf_s390_adjust_gotplt has created a GOT entry
2459 as replacement. 3) The relocation is against a local symbol.
2460 Cases 2) and 3) are the same as the GOT relocation code
2461 so we just have to test for case 1 and fall through for
2462 the other two. */
2463 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2464 {
2465 bfd_vma plt_index;
2466
2467 if (s390_is_ifunc_symbol_p (h))
2468 {
2469 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2470 relocation = (plt_index * GOT_ENTRY_SIZE +
2471 htab->elf.igotplt->output_offset);
2472 if (r_type == R_390_GOTPLTENT)
2473 relocation += htab->elf.igotplt->output_section->vma;
2474 }
2475 else
2476 {
2477 /* Calc. index no.
2478 Current offset - size first entry / entry size. */
2479 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2480 PLT_ENTRY_SIZE;
2481
2482 /* Offset in GOT is PLT index plus GOT headers(3)
2483 times 4, addr & GOT addr. */
2484 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2485 if (r_type == R_390_GOTPLTENT)
2486 relocation += htab->elf.sgot->output_section->vma;
2487 }
2488 unresolved_reloc = FALSE;
2489
2490 }
2491 /* Fall through. */
2492
2493 case R_390_GOT12:
2494 case R_390_GOT16:
2495 case R_390_GOT20:
2496 case R_390_GOT32:
2497 case R_390_GOTENT:
2498 /* Relocation is to the entry for this symbol in the global
2499 offset table. */
2500 if (base_got == NULL)
2501 abort ();
2502
2503 if (h != NULL)
2504 {
2505 bfd_boolean dyn;
2506
2507 off = h->got.offset;
2508 dyn = htab->elf.dynamic_sections_created;
2509
2510 if (s390_is_ifunc_symbol_p (h))
2511 {
2512 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2513 if (off == (bfd_vma)-1)
2514 {
2515 /* No explicit GOT usage so redirect to the
2516 got.iplt slot. */
2517 base_got = htab->elf.igotplt;
2518 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2519 }
2520 else
2521 {
2522 /* Explicit GOT slots must contain the address
2523 of the PLT slot. This will be handled in
2524 finish_dynamic_symbol. */
2525 }
2526 }
2527 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2528 bfd_link_pic (info),
2529 h)
2530 || (bfd_link_pic (info)
2531 && SYMBOL_REFERENCES_LOCAL (info, h))
2532 || (ELF_ST_VISIBILITY (h->other)
2533 && h->root.type == bfd_link_hash_undefweak))
2534
2535 {
2536 /* This is actually a static link, or it is a
2537 -Bsymbolic link and the symbol is defined
2538 locally, or the symbol was forced to be local
2539 because of a version file. We must initialize
2540 this entry in the global offset table. Since the
2541 offset must always be a multiple of 2, we use the
2542 least significant bit to record whether we have
2543 initialized it already.
2544
2545 When doing a dynamic link, we create a .rel.got
2546 relocation entry to initialize the value. This
2547 is done in the finish_dynamic_symbol routine. */
2548 if ((off & 1) != 0)
2549 off &= ~1;
2550 else
2551 {
2552 bfd_put_32 (output_bfd, relocation,
2553 base_got->contents + off);
2554 h->got.offset |= 1;
2555 }
2556
2557 if ((h->def_regular
2558 && bfd_link_pic (info)
2559 && SYMBOL_REFERENCES_LOCAL (info, h))
2560 /* lrl rx,sym@GOTENT -> larl rx, sym */
2561 && ((r_type == R_390_GOTENT
2562 && (bfd_get_16 (input_bfd,
2563 contents + rel->r_offset - 2)
2564 & 0xff0f) == 0xc40d)
2565 /* ly rx, sym@GOT(r12) -> larl rx, sym */
2566 || (r_type == R_390_GOT20
2567 && (bfd_get_32 (input_bfd,
2568 contents + rel->r_offset - 2)
2569 & 0xff00f000) == 0xe300c000
2570 && bfd_get_8 (input_bfd,
2571 contents + rel->r_offset + 3) == 0x58)))
2572 {
2573 unsigned short new_insn =
2574 (0xc000 | (bfd_get_8 (input_bfd,
2575 contents + rel->r_offset - 1) & 0xf0));
2576 bfd_put_16 (output_bfd, new_insn,
2577 contents + rel->r_offset - 2);
2578 r_type = R_390_PC32DBL;
2579 rel->r_addend = 2;
2580 howto = elf_howto_table + r_type;
2581 relocation = h->root.u.def.value
2582 + h->root.u.def.section->output_section->vma
2583 + h->root.u.def.section->output_offset;
2584 goto do_relocation;
2585 }
2586 }
2587 else
2588 unresolved_reloc = FALSE;
2589 }
2590 else
2591 {
2592 if (local_got_offsets == NULL)
2593 abort ();
2594
2595 off = local_got_offsets[r_symndx];
2596
2597 /* The offset must always be a multiple of 4. We use
2598 the least significant bit to record whether we have
2599 already generated the necessary reloc. */
2600 if ((off & 1) != 0)
2601 off &= ~1;
2602 else
2603 {
2604 bfd_put_32 (output_bfd, relocation,
2605 htab->elf.sgot->contents + off);
2606
2607 if (bfd_link_pic (info))
2608 {
2609 asection *srelgot;
2610 Elf_Internal_Rela outrel;
2611 bfd_byte *loc;
2612
2613 srelgot = htab->elf.srelgot;
2614 if (srelgot == NULL)
2615 abort ();
2616
2617 outrel.r_offset = (htab->elf.sgot->output_section->vma
2618 + htab->elf.sgot->output_offset
2619 + off);
2620 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2621 outrel.r_addend = relocation;
2622 loc = srelgot->contents;
2623 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2624 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2625 }
2626
2627 local_got_offsets[r_symndx] |= 1;
2628 }
2629 }
2630
2631 if (off >= (bfd_vma) -2)
2632 abort ();
2633
2634 relocation = base_got->output_offset + off;
2635
2636 /* For @GOTENT the relocation is against the offset between
2637 the instruction and the symbols entry in the GOT and not
2638 between the start of the GOT and the symbols entry. We
2639 add the vma of the GOT to get the correct value. */
2640 if ( r_type == R_390_GOTENT
2641 || r_type == R_390_GOTPLTENT)
2642 relocation += base_got->output_section->vma;
2643
2644 break;
2645
2646 case R_390_GOTOFF16:
2647 case R_390_GOTOFF32:
2648 /* Relocation is relative to the start of the global offset
2649 table. */
2650
2651 if (h != NULL
2652 && s390_is_ifunc_symbol_p (h)
2653 && h->def_regular
2654 && !bfd_link_executable (info))
2655 {
2656 relocation = (htab->elf.iplt->output_section->vma
2657 + htab->elf.iplt->output_offset
2658 + h->plt.offset
2659 - htab->elf.sgot->output_section->vma);
2660 goto do_relocation;
2661 }
2662
2663 /* Note that sgot->output_offset is not involved in this
2664 calculation. We always want the start of .got. If we
2665 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2666 permitted by the ABI, we might have to change this
2667 calculation. */
2668 relocation -= htab->elf.sgot->output_section->vma;
2669 break;
2670
2671 case R_390_GOTPC:
2672 case R_390_GOTPCDBL:
2673 /* Use global offset table as symbol value. */
2674 relocation = htab->elf.sgot->output_section->vma;
2675 unresolved_reloc = FALSE;
2676 break;
2677
2678 case R_390_PLT12DBL:
2679 case R_390_PLT16DBL:
2680 case R_390_PLT24DBL:
2681 case R_390_PLT32DBL:
2682 case R_390_PLT32:
2683 /* Relocation is to the entry for this symbol in the
2684 procedure linkage table. */
2685
2686 /* Resolve a PLT32 reloc against a local symbol directly,
2687 without using the procedure linkage table. */
2688 if (h == NULL)
2689 break;
2690
2691 if (h->plt.offset == (bfd_vma) -1
2692 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2693 {
2694 /* We didn't make a PLT entry for this symbol. This
2695 happens when statically linking PIC code, or when
2696 using -Bsymbolic. */
2697 break;
2698 }
2699
2700 if (s390_is_ifunc_symbol_p (h))
2701 relocation = (htab->elf.iplt->output_section->vma
2702 + htab->elf.iplt->output_offset
2703 + h->plt.offset);
2704 else
2705 relocation = (htab->elf.splt->output_section->vma
2706 + htab->elf.splt->output_offset
2707 + h->plt.offset);
2708 unresolved_reloc = FALSE;
2709 break;
2710
2711 case R_390_PLTOFF16:
2712 case R_390_PLTOFF32:
2713 /* Relocation is to the entry for this symbol in the
2714 procedure linkage table relative to the start of the GOT. */
2715
2716 /* For local symbols or if we didn't make a PLT entry for
2717 this symbol resolve the symbol directly. */
2718 if (h == NULL
2719 || h->plt.offset == (bfd_vma) -1
2720 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2721 {
2722 relocation -= htab->elf.sgot->output_section->vma;
2723 break;
2724 }
2725
2726 if (s390_is_ifunc_symbol_p (h))
2727 relocation = (htab->elf.iplt->output_section->vma
2728 + htab->elf.iplt->output_offset
2729 + h->plt.offset
2730 - htab->elf.sgot->output_section->vma);
2731 else
2732 relocation = (htab->elf.splt->output_section->vma
2733 + htab->elf.splt->output_offset
2734 + h->plt.offset
2735 - htab->elf.sgot->output_section->vma);
2736 unresolved_reloc = FALSE;
2737 break;
2738
2739 case R_390_8:
2740 case R_390_16:
2741 case R_390_32:
2742 case R_390_PC16:
2743 case R_390_PC12DBL:
2744 case R_390_PC16DBL:
2745 case R_390_PC24DBL:
2746 case R_390_PC32DBL:
2747 case R_390_PC32:
2748 if (h != NULL
2749 && s390_is_ifunc_symbol_p (h)
2750 && h->def_regular)
2751 {
2752 if (!bfd_link_pic (info) || !h->non_got_ref)
2753 {
2754 /* For a non-shared object STT_GNU_IFUNC symbol must
2755 go through PLT. */
2756 relocation = (htab->elf.iplt->output_section->vma
2757 + htab->elf.iplt->output_offset
2758 + h ->plt.offset);
2759 goto do_relocation;
2760 }
2761 else
2762 {
2763 /* For shared objects a runtime relocation is needed. */
2764
2765 Elf_Internal_Rela outrel;
2766 asection *sreloc;
2767
2768 /* Need a dynamic relocation to get the real function
2769 address. */
2770 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2771 info,
2772 input_section,
2773 rel->r_offset);
2774 if (outrel.r_offset == (bfd_vma) -1
2775 || outrel.r_offset == (bfd_vma) -2)
2776 abort ();
2777
2778 outrel.r_offset += (input_section->output_section->vma
2779 + input_section->output_offset);
2780
2781 if (h->dynindx == -1
2782 || h->forced_local
2783 || bfd_link_executable (info))
2784 {
2785 /* This symbol is resolved locally. */
2786 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2787 outrel.r_addend = (h->root.u.def.value
2788 + h->root.u.def.section->output_section->vma
2789 + h->root.u.def.section->output_offset);
2790 }
2791 else
2792 {
2793 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2794 outrel.r_addend = 0;
2795 }
2796
2797 sreloc = htab->elf.irelifunc;
2798 elf_append_rela (output_bfd, sreloc, &outrel);
2799
2800 /* If this reloc is against an external symbol, we
2801 do not want to fiddle with the addend. Otherwise,
2802 we need to include the symbol value so that it
2803 becomes an addend for the dynamic reloc. For an
2804 internal symbol, we have updated addend. */
2805 continue;
2806 }
2807 }
2808
2809 if ((input_section->flags & SEC_ALLOC) == 0)
2810 break;
2811
2812 if ((bfd_link_pic (info)
2813 && (h == NULL
2814 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2815 || h->root.type != bfd_link_hash_undefweak)
2816 && ((r_type != R_390_PC16
2817 && r_type != R_390_PC12DBL
2818 && r_type != R_390_PC16DBL
2819 && r_type != R_390_PC24DBL
2820 && r_type != R_390_PC32DBL
2821 && r_type != R_390_PC32)
2822 || !SYMBOL_CALLS_LOCAL (info, h)))
2823 || (ELIMINATE_COPY_RELOCS
2824 && !bfd_link_pic (info)
2825 && h != NULL
2826 && h->dynindx != -1
2827 && !h->non_got_ref
2828 && ((h->def_dynamic
2829 && !h->def_regular)
2830 || h->root.type == bfd_link_hash_undefweak
2831 || h->root.type == bfd_link_hash_undefined)))
2832 {
2833 Elf_Internal_Rela outrel;
2834 bfd_boolean skip, relocate;
2835 asection *sreloc;
2836 bfd_byte *loc;
2837
2838 /* When generating a shared object, these relocations
2839 are copied into the output file to be resolved at run
2840 time. */
2841
2842 skip = FALSE;
2843 relocate = FALSE;
2844
2845 outrel.r_offset =
2846 _bfd_elf_section_offset (output_bfd, info, input_section,
2847 rel->r_offset);
2848 if (outrel.r_offset == (bfd_vma) -1)
2849 skip = TRUE;
2850 else if (outrel.r_offset == (bfd_vma) -2)
2851 skip = TRUE, relocate = TRUE;
2852 outrel.r_offset += (input_section->output_section->vma
2853 + input_section->output_offset);
2854
2855 if (skip)
2856 memset (&outrel, 0, sizeof outrel);
2857 else if (h != NULL
2858 && h->dynindx != -1
2859 && (r_type == R_390_PC16
2860 || r_type == R_390_PC12DBL
2861 || r_type == R_390_PC16DBL
2862 || r_type == R_390_PC24DBL
2863 || r_type == R_390_PC32DBL
2864 || r_type == R_390_PC32
2865 || !bfd_link_pic (info)
2866 || !SYMBOLIC_BIND (info, h)
2867 || !h->def_regular))
2868 {
2869 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2870 outrel.r_addend = rel->r_addend;
2871 }
2872 else
2873 {
2874 /* This symbol is local, or marked to become local. */
2875 outrel.r_addend = relocation + rel->r_addend;
2876 if (r_type == R_390_32)
2877 {
2878 relocate = TRUE;
2879 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2880 }
2881 else
2882 {
2883 long sindx;
2884
2885 if (bfd_is_abs_section (sec))
2886 sindx = 0;
2887 else if (sec == NULL || sec->owner == NULL)
2888 {
2889 bfd_set_error(bfd_error_bad_value);
2890 return FALSE;
2891 }
2892 else
2893 {
2894 asection *osec;
2895
2896 osec = sec->output_section;
2897 sindx = elf_section_data (osec)->dynindx;
2898 if (sindx == 0)
2899 {
2900 osec = htab->elf.text_index_section;
2901 sindx = elf_section_data (osec)->dynindx;
2902 }
2903 BFD_ASSERT (sindx != 0);
2904
2905 /* We are turning this relocation into one
2906 against a section symbol, so subtract out
2907 the output section's address but not the
2908 offset of the input section in the output
2909 section. */
2910 outrel.r_addend -= osec->vma;
2911 }
2912 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2913 }
2914 }
2915
2916 sreloc = elf_section_data (input_section)->sreloc;
2917 if (sreloc == NULL)
2918 abort ();
2919
2920 loc = sreloc->contents;
2921 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2922 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2923
2924 /* If this reloc is against an external symbol, we do
2925 not want to fiddle with the addend. Otherwise, we
2926 need to include the symbol value so that it becomes
2927 an addend for the dynamic reloc. */
2928 if (! relocate)
2929 continue;
2930 }
2931 break;
2932
2933 /* Relocations for tls literal pool entries. */
2934 case R_390_TLS_IE32:
2935 if (bfd_link_pic (info))
2936 {
2937 Elf_Internal_Rela outrel;
2938 asection *sreloc;
2939 bfd_byte *loc;
2940
2941 outrel.r_offset = rel->r_offset
2942 + input_section->output_section->vma
2943 + input_section->output_offset;
2944 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2945 sreloc = elf_section_data (input_section)->sreloc;
2946 if (sreloc == NULL)
2947 abort ();
2948 loc = sreloc->contents;
2949 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2950 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2951 }
2952 /* Fall through. */
2953
2954 case R_390_TLS_GD32:
2955 case R_390_TLS_GOTIE32:
2956 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2957 tls_type = GOT_UNKNOWN;
2958 if (h == NULL && local_got_offsets)
2959 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2960 else if (h != NULL)
2961 {
2962 tls_type = elf_s390_hash_entry(h)->tls_type;
2963 if (!bfd_link_pic (info)
2964 && h->dynindx == -1
2965 && tls_type >= GOT_TLS_IE)
2966 r_type = R_390_TLS_LE32;
2967 }
2968 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2969 r_type = R_390_TLS_IE32;
2970
2971 if (r_type == R_390_TLS_LE32)
2972 {
2973 /* This relocation gets optimized away by the local exec
2974 access optimization. */
2975 BFD_ASSERT (! unresolved_reloc);
2976 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2977 contents + rel->r_offset);
2978 continue;
2979 }
2980
2981 if (htab->elf.sgot == NULL)
2982 abort ();
2983
2984 if (h != NULL)
2985 off = h->got.offset;
2986 else
2987 {
2988 if (local_got_offsets == NULL)
2989 abort ();
2990
2991 off = local_got_offsets[r_symndx];
2992 }
2993
2994 emit_tls_relocs:
2995
2996 if ((off & 1) != 0)
2997 off &= ~1;
2998 else
2999 {
3000 Elf_Internal_Rela outrel;
3001 bfd_byte *loc;
3002 int dr_type, indx;
3003
3004 if (htab->elf.srelgot == NULL)
3005 abort ();
3006
3007 outrel.r_offset = (htab->elf.sgot->output_section->vma
3008 + htab->elf.sgot->output_offset + off);
3009
3010 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3011 if (r_type == R_390_TLS_GD32)
3012 dr_type = R_390_TLS_DTPMOD;
3013 else
3014 dr_type = R_390_TLS_TPOFF;
3015 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3016 outrel.r_addend = relocation - dtpoff_base (info);
3017 else
3018 outrel.r_addend = 0;
3019 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3020 loc = htab->elf.srelgot->contents;
3021 loc += htab->elf.srelgot->reloc_count++
3022 * sizeof (Elf32_External_Rela);
3023 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3024
3025 if (r_type == R_390_TLS_GD32)
3026 {
3027 if (indx == 0)
3028 {
3029 BFD_ASSERT (! unresolved_reloc);
3030 bfd_put_32 (output_bfd,
3031 relocation - dtpoff_base (info),
3032 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3033 }
3034 else
3035 {
3036 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
3037 outrel.r_offset += GOT_ENTRY_SIZE;
3038 outrel.r_addend = 0;
3039 htab->elf.srelgot->reloc_count++;
3040 loc += sizeof (Elf32_External_Rela);
3041 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3042 }
3043 }
3044
3045 if (h != NULL)
3046 h->got.offset |= 1;
3047 else
3048 local_got_offsets[r_symndx] |= 1;
3049 }
3050
3051 if (off >= (bfd_vma) -2)
3052 abort ();
3053 if (r_type == ELF32_R_TYPE (rel->r_info))
3054 {
3055 relocation = htab->elf.sgot->output_offset + off;
3056 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
3057 relocation += htab->elf.sgot->output_section->vma;
3058 unresolved_reloc = FALSE;
3059 }
3060 else
3061 {
3062 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
3063 contents + rel->r_offset);
3064 continue;
3065 }
3066 break;
3067
3068 case R_390_TLS_GOTIE12:
3069 case R_390_TLS_GOTIE20:
3070 case R_390_TLS_IEENT:
3071 if (h == NULL)
3072 {
3073 if (local_got_offsets == NULL)
3074 abort();
3075 off = local_got_offsets[r_symndx];
3076 if (bfd_link_pic (info))
3077 goto emit_tls_relocs;
3078 }
3079 else
3080 {
3081 off = h->got.offset;
3082 tls_type = elf_s390_hash_entry(h)->tls_type;
3083 if (bfd_link_pic (info)
3084 || h->dynindx != -1
3085 || tls_type < GOT_TLS_IE)
3086 goto emit_tls_relocs;
3087 }
3088
3089 if (htab->elf.sgot == NULL)
3090 abort ();
3091
3092 BFD_ASSERT (! unresolved_reloc);
3093 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3094 htab->elf.sgot->contents + off);
3095 relocation = htab->elf.sgot->output_offset + off;
3096 if (r_type == R_390_TLS_IEENT)
3097 relocation += htab->elf.sgot->output_section->vma;
3098 unresolved_reloc = FALSE;
3099 break;
3100
3101 case R_390_TLS_LDM32:
3102 if (! bfd_link_pic (info))
3103 /* The literal pool entry this relocation refers to gets ignored
3104 by the optimized code of the local exec model. Do nothing
3105 and the value will turn out zero. */
3106 continue;
3107
3108 if (htab->elf.sgot == NULL)
3109 abort ();
3110
3111 off = htab->tls_ldm_got.offset;
3112 if (off & 1)
3113 off &= ~1;
3114 else
3115 {
3116 Elf_Internal_Rela outrel;
3117 bfd_byte *loc;
3118
3119 if (htab->elf.srelgot == NULL)
3120 abort ();
3121
3122 outrel.r_offset = (htab->elf.sgot->output_section->vma
3123 + htab->elf.sgot->output_offset + off);
3124
3125 bfd_put_32 (output_bfd, 0,
3126 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3127 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3128 outrel.r_addend = 0;
3129 loc = htab->elf.srelgot->contents;
3130 loc += htab->elf.srelgot->reloc_count++
3131 * sizeof (Elf32_External_Rela);
3132 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3133 htab->tls_ldm_got.offset |= 1;
3134 }
3135 relocation = htab->elf.sgot->output_offset + off;
3136 unresolved_reloc = FALSE;
3137 break;
3138
3139 case R_390_TLS_LE32:
3140 if (bfd_link_dll (info))
3141 {
3142 /* Linking a shared library with non-fpic code requires
3143 a R_390_TLS_TPOFF relocation. */
3144 Elf_Internal_Rela outrel;
3145 asection *sreloc;
3146 bfd_byte *loc;
3147 int indx;
3148
3149 outrel.r_offset = rel->r_offset
3150 + input_section->output_section->vma
3151 + input_section->output_offset;
3152 if (h != NULL && h->dynindx != -1)
3153 indx = h->dynindx;
3154 else
3155 indx = 0;
3156 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3157 if (indx == 0)
3158 outrel.r_addend = relocation - dtpoff_base (info);
3159 else
3160 outrel.r_addend = 0;
3161 sreloc = elf_section_data (input_section)->sreloc;
3162 if (sreloc == NULL)
3163 abort ();
3164 loc = sreloc->contents;
3165 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3166 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3167 }
3168 else
3169 {
3170 BFD_ASSERT (! unresolved_reloc);
3171 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3172 contents + rel->r_offset);
3173 }
3174 continue;
3175
3176 case R_390_TLS_LDO32:
3177 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3178 relocation -= dtpoff_base (info);
3179 else
3180 /* When converting LDO to LE, we must negate. */
3181 relocation = -tpoff (info, relocation);
3182 break;
3183
3184 /* Relocations for tls instructions. */
3185 case R_390_TLS_LOAD:
3186 case R_390_TLS_GDCALL:
3187 case R_390_TLS_LDCALL:
3188 tls_type = GOT_UNKNOWN;
3189 if (h == NULL && local_got_offsets)
3190 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3191 else if (h != NULL)
3192 tls_type = elf_s390_hash_entry(h)->tls_type;
3193
3194 if (tls_type == GOT_TLS_GD)
3195 continue;
3196
3197 if (r_type == R_390_TLS_LOAD)
3198 {
3199 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3200 {
3201 /* IE->LE transition. Four valid cases:
3202 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3203 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3204 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3205 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3206 unsigned int insn, ry;
3207
3208 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3209 ry = 0;
3210 if ((insn & 0xff00f000) == 0x58000000)
3211 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3212 ry = (insn & 0x000f0000);
3213 else if ((insn & 0xff0f0000) == 0x58000000)
3214 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3215 ry = (insn & 0x0000f000) << 4;
3216 else if ((insn & 0xff00f000) == 0x5800c000)
3217 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3218 ry = (insn & 0x000f0000);
3219 else if ((insn & 0xff0f0000) == 0x580c0000)
3220 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3221 ry = (insn & 0x0000f000) << 4;
3222 else
3223 invalid_tls_insn (input_bfd, input_section, rel);
3224 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3225 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3226 }
3227 }
3228 else if (r_type == R_390_TLS_GDCALL)
3229 {
3230 unsigned int insn;
3231
3232 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3233 if ((insn & 0xff000fff) != 0x4d000000 &&
3234 (insn & 0xffff0000) != 0xc0e50000 &&
3235 (insn & 0xff000000) != 0x0d000000)
3236 invalid_tls_insn (input_bfd, input_section, rel);
3237 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3238 {
3239 if ((insn & 0xff000000) == 0x0d000000)
3240 {
3241 /* GD->LE transition.
3242 basr rx, ry -> nopr r7 */
3243 insn = 0x07070000 | (insn & 0xffff);
3244 }
3245 else if ((insn & 0xff000000) == 0x4d000000)
3246 {
3247 /* GD->LE transition.
3248 bas %r14,0(%rx,%r13) -> bc 0,0 */
3249 insn = 0x47000000;
3250 }
3251 else
3252 {
3253 /* GD->LE transition.
3254 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3255 insn = 0xc0040000;
3256 bfd_put_16 (output_bfd, 0x0000,
3257 contents + rel->r_offset + 4);
3258 }
3259 }
3260 else
3261 {
3262 /* If basr is used in the pic case to invoke
3263 _tls_get_offset, something went wrong before. */
3264 if ((insn & 0xff000000) == 0x0d000000)
3265 invalid_tls_insn (input_bfd, input_section, rel);
3266
3267 if ((insn & 0xff000000) == 0x4d000000)
3268 {
3269 /* GD->IE transition.
3270 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3271 insn = 0x5822c000;
3272 }
3273 else
3274 {
3275 /* GD->IE transition.
3276 brasl %r14,__tls_get_addr@plt ->
3277 l %r2,0(%r2,%r12) ; bcr 0,0 */
3278 insn = 0x5822c000;
3279 bfd_put_16 (output_bfd, 0x0700,
3280 contents + rel->r_offset + 4);
3281 }
3282 }
3283 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3284 }
3285 else if (r_type == R_390_TLS_LDCALL)
3286 {
3287 if (!bfd_link_pic (info))
3288 {
3289 unsigned int insn;
3290
3291 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3292 if ((insn & 0xff000fff) != 0x4d000000 &&
3293 (insn & 0xffff0000) != 0xc0e50000 &&
3294 (insn & 0xff000000) != 0x0d000000)
3295 invalid_tls_insn (input_bfd, input_section, rel);
3296
3297 if ((insn & 0xff000000) == 0x0d000000)
3298 {
3299 /* LD->LE transition.
3300 basr rx, ry -> nopr r7 */
3301 insn = 0x07070000 | (insn & 0xffff);
3302 }
3303 else if ((insn & 0xff000000) == 0x4d000000)
3304 {
3305 /* LD->LE transition.
3306 bas %r14,0(%rx,%r13) -> bc 0,0 */
3307 insn = 0x47000000;
3308 }
3309 else
3310 {
3311 /* LD->LE transition.
3312 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3313 insn = 0xc0040000;
3314 bfd_put_16 (output_bfd, 0x0000,
3315 contents + rel->r_offset + 4);
3316 }
3317 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3318 }
3319 }
3320 continue;
3321
3322 default:
3323 break;
3324 }
3325
3326 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3327 because such sections are not SEC_ALLOC and thus ld.so will
3328 not process them. */
3329 if (unresolved_reloc
3330 && !((input_section->flags & SEC_DEBUGGING) != 0
3331 && h->def_dynamic)
3332 && _bfd_elf_section_offset (output_bfd, info, input_section,
3333 rel->r_offset) != (bfd_vma) -1)
3334 (*_bfd_error_handler)
3335 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3336 input_bfd,
3337 input_section,
3338 (long) rel->r_offset,
3339 howto->name,
3340 h->root.root.string);
3341
3342 do_relocation:
3343
3344 /* When applying a 24 bit reloc we need to start one byte
3345 earlier. Otherwise the 32 bit get/put bfd operations might
3346 access a byte after the actual section. */
3347 if (r_type == R_390_PC24DBL
3348 || r_type == R_390_PLT24DBL)
3349 rel->r_offset--;
3350
3351 if (r_type == R_390_20
3352 || r_type == R_390_GOT20
3353 || r_type == R_390_GOTPLT20
3354 || r_type == R_390_TLS_GOTIE20)
3355 {
3356 relocation += rel->r_addend;
3357 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3358 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3359 contents, rel->r_offset,
3360 relocation, 0);
3361 }
3362 else
3363 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3364 contents, rel->r_offset,
3365 relocation, rel->r_addend);
3366
3367 if (r != bfd_reloc_ok)
3368 {
3369 const char *name;
3370
3371 if (h != NULL)
3372 name = h->root.root.string;
3373 else
3374 {
3375 name = bfd_elf_string_from_elf_section (input_bfd,
3376 symtab_hdr->sh_link,
3377 sym->st_name);
3378 if (name == NULL)
3379 return FALSE;
3380 if (*name == '\0')
3381 name = bfd_section_name (input_bfd, sec);
3382 }
3383
3384 if (r == bfd_reloc_overflow)
3385 {
3386
3387 if (! ((*info->callbacks->reloc_overflow)
3388 (info, (h ? &h->root : NULL), name, howto->name,
3389 (bfd_vma) 0, input_bfd, input_section,
3390 rel->r_offset)))
3391 return FALSE;
3392 }
3393 else
3394 {
3395 (*_bfd_error_handler)
3396 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3397 input_bfd, input_section,
3398 (long) rel->r_offset, name, (int) r);
3399 return FALSE;
3400 }
3401 }
3402 }
3403
3404 return TRUE;
3405 }
3406
3407 /* Generate the PLT slots together with the dynamic relocations needed
3408 for IFUNC symbols. */
3409
3410 static void
3411 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3412 struct bfd_link_info *info,
3413 struct elf_link_hash_entry *h,
3414 struct elf_s390_link_hash_table *htab,
3415 bfd_vma iplt_offset,
3416 bfd_vma resolver_address)
3417 {
3418 bfd_vma iplt_index;
3419 bfd_vma got_offset;
3420 bfd_vma igotiplt_offset;
3421 Elf_Internal_Rela rela;
3422 bfd_byte *loc;
3423 asection *plt, *gotplt, *relplt;
3424 bfd_vma relative_offset;
3425
3426 if (htab->elf.iplt == NULL
3427 || htab->elf.igotplt == NULL
3428 || htab->elf.irelplt == NULL)
3429 abort ();
3430
3431 gotplt = htab->elf.igotplt;
3432 relplt = htab->elf.irelplt;
3433
3434 /* Index of the PLT slot within iplt section. */
3435 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3436 plt = htab->elf.iplt;
3437 /* Offset into the igot.plt section. */
3438 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3439 /* Offset into the got section. */
3440 got_offset = igotiplt_offset + gotplt->output_offset;
3441
3442 /* S390 uses halfwords for relative branch calc! */
3443 relative_offset = - (plt->output_offset +
3444 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3445 /* If offset is > 32768, branch to a previous branch
3446 390 can only handle +-64 K jumps. */
3447 if ( -32768 > (int) relative_offset )
3448 relative_offset
3449 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3450
3451 /* Fill in the entry in the procedure linkage table. */
3452 if (!bfd_link_pic (info))
3453 {
3454 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3455 PLT_ENTRY_SIZE);
3456
3457 /* Adjust jump to the first plt entry. */
3458 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3459 plt->contents + iplt_offset + 20);
3460
3461 /* Push the GOT offset field. */
3462 bfd_put_32 (output_bfd,
3463 (gotplt->output_section->vma
3464 + got_offset),
3465 plt->contents + iplt_offset + 24);
3466 }
3467 else if (got_offset < 4096)
3468 {
3469 /* The GOT offset is small enough to be used directly as
3470 displacement. */
3471 memcpy (plt->contents + iplt_offset,
3472 elf_s390_plt_pic12_entry,
3473 PLT_ENTRY_SIZE);
3474
3475 /* Put in the GOT offset as displacement value. The 0xc000
3476 value comes from the first word of the plt entry. Look
3477 at the elf_s390_plt_pic16_entry content. */
3478 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3479 plt->contents + iplt_offset + 2);
3480
3481 /* Adjust the jump to the first plt entry. */
3482 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3483 plt->contents + iplt_offset + 20);
3484 }
3485 else if (got_offset < 32768)
3486 {
3487 /* The GOT offset is too big for a displacement but small
3488 enough to be a signed 16 bit immediate value as it can be
3489 used in an lhi instruction. */
3490 memcpy (plt->contents + iplt_offset,
3491 elf_s390_plt_pic16_entry,
3492 PLT_ENTRY_SIZE);
3493
3494 /* Put in the GOT offset for the lhi instruction. */
3495 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3496 plt->contents + iplt_offset + 2);
3497
3498 /* Adjust the jump to the first plt entry. */
3499 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3500 plt->contents + iplt_offset + 20);
3501 }
3502 else
3503 {
3504 memcpy (plt->contents + iplt_offset,
3505 elf_s390_plt_pic_entry,
3506 PLT_ENTRY_SIZE);
3507
3508 /* Adjust the jump to the first plt entry. */
3509 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3510 plt->contents + iplt_offset + 20);
3511
3512 /* Push the GOT offset field. */
3513 bfd_put_32 (output_bfd, got_offset,
3514 plt->contents + iplt_offset + 24);
3515 }
3516 /* Insert offset into reloc. table here. */
3517 bfd_put_32 (output_bfd, relplt->output_offset +
3518 iplt_index * RELA_ENTRY_SIZE,
3519 plt->contents + iplt_offset + 28);
3520
3521 /* Fill in the entry in the global offset table.
3522 Points to instruction after GOT offset. */
3523 bfd_put_32 (output_bfd,
3524 (plt->output_section->vma
3525 + plt->output_offset
3526 + iplt_offset
3527 + 12),
3528 gotplt->contents + igotiplt_offset);
3529
3530 /* Fill in the entry in the .rela.plt section. */
3531 rela.r_offset = gotplt->output_section->vma + got_offset;
3532
3533 if (!h
3534 || h->dynindx == -1
3535 || ((bfd_link_executable (info)
3536 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3537 && h->def_regular))
3538 {
3539 /* The symbol can be locally resolved. */
3540 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3541 rela.r_addend = resolver_address;
3542 }
3543 else
3544 {
3545 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3546 rela.r_addend = 0;
3547 }
3548
3549 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3550 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3551 }
3552
3553 /* Finish up dynamic symbol handling. We set the contents of various
3554 dynamic sections here. */
3555
3556 static bfd_boolean
3557 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3558 struct bfd_link_info *info,
3559 struct elf_link_hash_entry *h,
3560 Elf_Internal_Sym *sym)
3561 {
3562 struct elf_s390_link_hash_table *htab;
3563 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3564
3565 htab = elf_s390_hash_table (info);
3566
3567 if (h->plt.offset != (bfd_vma) -1)
3568 {
3569 bfd_vma plt_index;
3570 bfd_vma got_offset;
3571 Elf_Internal_Rela rela;
3572 bfd_byte *loc;
3573 bfd_vma relative_offset;
3574
3575 /* This symbol has an entry in the procedure linkage table. Set
3576 it up. */
3577 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3578 {
3579 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3580 htab, h->plt.offset,
3581 eh->ifunc_resolver_address +
3582 eh->ifunc_resolver_section->output_offset +
3583 eh->ifunc_resolver_section->output_section->vma);
3584 /* Do not return yet. Handling of explicit GOT slots of
3585 IFUNC symbols is below. */
3586 }
3587 else
3588 {
3589 if (h->dynindx == -1
3590 || htab->elf.splt == NULL
3591 || htab->elf.sgotplt == NULL
3592 || htab->elf.srelplt == NULL)
3593 abort ();
3594
3595 /* Calc. index no.
3596 Current offset - size first entry / entry size. */
3597 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3598
3599 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3600 addr & GOT addr. */
3601 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3602
3603 /* S390 uses halfwords for relative branch calc! */
3604 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3605 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3606 /* If offset is > 32768, branch to a previous branch
3607 390 can only handle +-64 K jumps. */
3608 if ( -32768 > (int) relative_offset )
3609 relative_offset
3610 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3611
3612 /* Fill in the entry in the procedure linkage table. */
3613 if (!bfd_link_pic (info))
3614 {
3615 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3616 PLT_ENTRY_SIZE);
3617
3618 /* Adjust jump to the first plt entry. */
3619 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3620 htab->elf.splt->contents + h->plt.offset + 20);
3621
3622 /* Push the GOT offset field. */
3623 bfd_put_32 (output_bfd,
3624 (htab->elf.sgotplt->output_section->vma
3625 + htab->elf.sgotplt->output_offset
3626 + got_offset),
3627 htab->elf.splt->contents + h->plt.offset + 24);
3628 }
3629 else if (got_offset < 4096)
3630 {
3631 /* The GOT offset is small enough to be used directly as
3632 displacement. */
3633 memcpy (htab->elf.splt->contents + h->plt.offset,
3634 elf_s390_plt_pic12_entry,
3635 PLT_ENTRY_SIZE);
3636
3637 /* Put in the GOT offset as displacement value. The 0xc000
3638 value comes from the first word of the plt entry. Look
3639 at the elf_s390_plt_pic16_entry content. */
3640 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3641 htab->elf.splt->contents + h->plt.offset + 2);
3642
3643 /* Adjust the jump to the first plt entry. */
3644 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3645 htab->elf.splt->contents + h->plt.offset + 20);
3646 }
3647 else if (got_offset < 32768)
3648 {
3649 /* The GOT offset is too big for a displacement but small
3650 enough to be a signed 16 bit immediate value as it can be
3651 used in an lhi instruction. */
3652 memcpy (htab->elf.splt->contents + h->plt.offset,
3653 elf_s390_plt_pic16_entry,
3654 PLT_ENTRY_SIZE);
3655
3656 /* Put in the GOT offset for the lhi instruction. */
3657 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3658 htab->elf.splt->contents + h->plt.offset + 2);
3659
3660 /* Adjust the jump to the first plt entry. */
3661 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3662 htab->elf.splt->contents + h->plt.offset + 20);
3663 }
3664 else
3665 {
3666 memcpy (htab->elf.splt->contents + h->plt.offset,
3667 elf_s390_plt_pic_entry,
3668 PLT_ENTRY_SIZE);
3669
3670 /* Adjust the jump to the first plt entry. */
3671 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3672 htab->elf.splt->contents + h->plt.offset + 20);
3673
3674 /* Push the GOT offset field. */
3675 bfd_put_32 (output_bfd, got_offset,
3676 htab->elf.splt->contents + h->plt.offset + 24);
3677 }
3678 /* Insert offset into reloc. table here. */
3679 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3680 htab->elf.splt->contents + h->plt.offset + 28);
3681
3682 /* Fill in the entry in the global offset table.
3683 Points to instruction after GOT offset. */
3684 bfd_put_32 (output_bfd,
3685 (htab->elf.splt->output_section->vma
3686 + htab->elf.splt->output_offset
3687 + h->plt.offset
3688 + 12),
3689 htab->elf.sgotplt->contents + got_offset);
3690
3691 /* Fill in the entry in the .rela.plt section. */
3692 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3693 + htab->elf.sgotplt->output_offset
3694 + got_offset);
3695 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3696 rela.r_addend = 0;
3697 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3698 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3699
3700 if (!h->def_regular)
3701 {
3702 /* Mark the symbol as undefined, rather than as defined in
3703 the .plt section. Leave the value alone. This is a clue
3704 for the dynamic linker, to make function pointer
3705 comparisons work between an application and shared
3706 library. */
3707 sym->st_shndx = SHN_UNDEF;
3708 }
3709 }
3710 }
3711
3712 if (h->got.offset != (bfd_vma) -1
3713 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3714 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3715 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3716 {
3717 Elf_Internal_Rela rela;
3718 bfd_byte *loc;
3719
3720 /* This symbol has an entry in the global offset table. Set it
3721 up. */
3722
3723 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3724 abort ();
3725
3726 rela.r_offset = (htab->elf.sgot->output_section->vma
3727 + htab->elf.sgot->output_offset
3728 + (h->got.offset &~ (bfd_vma) 1));
3729
3730 /* If this is a static link, or it is a -Bsymbolic link and the
3731 symbol is defined locally or was forced to be local because
3732 of a version file, we just want to emit a RELATIVE reloc.
3733 The entry in the global offset table will already have been
3734 initialized in the relocate_section function. */
3735 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3736 {
3737 if (bfd_link_pic (info))
3738 {
3739 /* An explicit GOT slot usage needs GLOB_DAT. If the
3740 symbol references local the implicit got.iplt slot
3741 will be used and the IRELATIVE reloc has been created
3742 above. */
3743 goto do_glob_dat;
3744 }
3745 else
3746 {
3747 /* For non-shared objects explicit GOT slots must be
3748 filled with the PLT slot address for pointer
3749 equality reasons. */
3750 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3751 + htab->elf.iplt->output_offset
3752 + h->plt.offset),
3753 htab->elf.sgot->contents + h->got.offset);
3754 return TRUE;
3755 }
3756 }
3757 else if (bfd_link_pic (info)
3758 && SYMBOL_REFERENCES_LOCAL (info, h))
3759 {
3760 /* If this is a static link, or it is a -Bsymbolic link and
3761 the symbol is defined locally or was forced to be local
3762 because of a version file, we just want to emit a
3763 RELATIVE reloc. The entry in the global offset table
3764 will already have been initialized in the
3765 relocate_section function. */
3766 if (!h->def_regular)
3767 return FALSE;
3768 BFD_ASSERT((h->got.offset & 1) != 0);
3769 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3770 rela.r_addend = (h->root.u.def.value
3771 + h->root.u.def.section->output_section->vma
3772 + h->root.u.def.section->output_offset);
3773 }
3774 else
3775 {
3776 BFD_ASSERT((h->got.offset & 1) == 0);
3777 do_glob_dat:
3778 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3779 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3780 rela.r_addend = 0;
3781 }
3782
3783 loc = htab->elf.srelgot->contents;
3784 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3785 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3786 }
3787
3788 if (h->needs_copy)
3789 {
3790 Elf_Internal_Rela rela;
3791 bfd_byte *loc;
3792
3793 /* This symbols needs a copy reloc. Set it up. */
3794
3795 if (h->dynindx == -1
3796 || (h->root.type != bfd_link_hash_defined
3797 && h->root.type != bfd_link_hash_defweak)
3798 || htab->srelbss == NULL)
3799 abort ();
3800
3801 rela.r_offset = (h->root.u.def.value
3802 + h->root.u.def.section->output_section->vma
3803 + h->root.u.def.section->output_offset);
3804 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3805 rela.r_addend = 0;
3806 loc = htab->srelbss->contents;
3807 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3808 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3809 }
3810
3811 /* Mark some specially defined symbols as absolute. */
3812 if (h == htab->elf.hdynamic
3813 || h == htab->elf.hgot
3814 || h == htab->elf.hplt)
3815 sym->st_shndx = SHN_ABS;
3816
3817 return TRUE;
3818 }
3819
3820 /* Used to decide how to sort relocs in an optimal manner for the
3821 dynamic linker, before writing them out. */
3822
3823 static enum elf_reloc_type_class
3824 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3825 const asection *rel_sec ATTRIBUTE_UNUSED,
3826 const Elf_Internal_Rela *rela)
3827 {
3828 bfd *abfd = info->output_bfd;
3829 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3830 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3831 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3832 Elf_Internal_Sym sym;
3833
3834 if (htab->elf.dynsym == NULL
3835 || !bed->s->swap_symbol_in (abfd,
3836 (htab->elf.dynsym->contents
3837 + r_symndx * bed->s->sizeof_sym),
3838 0, &sym))
3839 abort ();
3840
3841 /* Check relocation against STT_GNU_IFUNC symbol. */
3842 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3843 return reloc_class_ifunc;
3844
3845 switch ((int) ELF32_R_TYPE (rela->r_info))
3846 {
3847 case R_390_RELATIVE:
3848 return reloc_class_relative;
3849 case R_390_JMP_SLOT:
3850 return reloc_class_plt;
3851 case R_390_COPY:
3852 return reloc_class_copy;
3853 default:
3854 return reloc_class_normal;
3855 }
3856 }
3857
3858 /* Finish up the dynamic sections. */
3859
3860 static bfd_boolean
3861 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3862 struct bfd_link_info *info)
3863 {
3864 struct elf_s390_link_hash_table *htab;
3865 bfd *dynobj;
3866 asection *sdyn;
3867 bfd *ibfd;
3868 unsigned int i;
3869
3870 htab = elf_s390_hash_table (info);
3871 dynobj = htab->elf.dynobj;
3872 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3873
3874 if (htab->elf.dynamic_sections_created)
3875 {
3876 Elf32_External_Dyn *dyncon, *dynconend;
3877
3878 if (sdyn == NULL || htab->elf.sgot == NULL)
3879 abort ();
3880
3881 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3882 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3883 for (; dyncon < dynconend; dyncon++)
3884 {
3885 Elf_Internal_Dyn dyn;
3886 asection *s;
3887
3888 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3889
3890 switch (dyn.d_tag)
3891 {
3892 default:
3893 continue;
3894
3895 case DT_PLTGOT:
3896 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3897 break;
3898
3899 case DT_JMPREL:
3900 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3901 break;
3902
3903 case DT_PLTRELSZ:
3904 s = htab->elf.srelplt->output_section;
3905 dyn.d_un.d_val = s->size;
3906 break;
3907 }
3908
3909 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3910 }
3911
3912 /* Fill in the special first entry in the procedure linkage table. */
3913 if (htab->elf.splt && htab->elf.splt->size > 0)
3914 {
3915 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3916 if (bfd_link_pic (info))
3917 {
3918 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3919 PLT_FIRST_ENTRY_SIZE);
3920 }
3921 else
3922 {
3923 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3924 PLT_FIRST_ENTRY_SIZE);
3925 bfd_put_32 (output_bfd,
3926 htab->elf.sgotplt->output_section->vma
3927 + htab->elf.sgotplt->output_offset,
3928 htab->elf.splt->contents + 24);
3929 }
3930 elf_section_data (htab->elf.splt->output_section)
3931 ->this_hdr.sh_entsize = 4;
3932 }
3933
3934 }
3935
3936 if (htab->elf.sgotplt)
3937 {
3938 /* Fill in the first three entries in the global offset table. */
3939 if (htab->elf.sgotplt->size > 0)
3940 {
3941 bfd_put_32 (output_bfd,
3942 (sdyn == NULL ? (bfd_vma) 0
3943 : sdyn->output_section->vma + sdyn->output_offset),
3944 htab->elf.sgotplt->contents);
3945 /* One entry for shared object struct ptr. */
3946 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3947 /* One entry for _dl_runtime_resolve. */
3948 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3949 }
3950
3951 elf_section_data (htab->elf.sgotplt->output_section)
3952 ->this_hdr.sh_entsize = 4;
3953 }
3954 /* Finish dynamic symbol for local IFUNC symbols. */
3955 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3956 {
3957 struct plt_entry *local_plt;
3958 Elf_Internal_Sym *isym;
3959 Elf_Internal_Shdr *symtab_hdr;
3960
3961 symtab_hdr = &elf_symtab_hdr (ibfd);
3962
3963 local_plt = elf_s390_local_plt (ibfd);
3964 if (local_plt != NULL)
3965 for (i = 0; i < symtab_hdr->sh_info; i++)
3966 {
3967 if (local_plt[i].plt.offset != (bfd_vma) -1)
3968 {
3969 asection *sec = local_plt[i].sec;
3970 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3971 if (isym == NULL)
3972 return FALSE;
3973
3974 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3975 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3976 local_plt[i].plt.offset,
3977 isym->st_value
3978 + sec->output_section->vma
3979 + sec->output_offset);
3980
3981 }
3982 }
3983 }
3984 return TRUE;
3985 }
3986
3987 static bfd_boolean
3988 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3989 {
3990 int offset;
3991 unsigned int size;
3992
3993 switch (note->descsz)
3994 {
3995 default:
3996 return FALSE;
3997
3998 case 224: /* S/390 Linux. */
3999 /* pr_cursig */
4000 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
4001
4002 /* pr_pid */
4003 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
4004
4005 /* pr_reg */
4006 offset = 72;
4007 size = 144;
4008 break;
4009 }
4010
4011 /* Make a ".reg/999" section. */
4012 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
4013 size, note->descpos + offset);
4014 }
4015
4016 /* Return address for Ith PLT stub in section PLT, for relocation REL
4017 or (bfd_vma) -1 if it should not be included. */
4018
4019 static bfd_vma
4020 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
4021 const arelent *rel ATTRIBUTE_UNUSED)
4022 {
4023 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
4024 }
4025
4026 /* Merge backend specific data from an object file to the output
4027 object file when linking. */
4028
4029 static bfd_boolean
4030 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4031 {
4032 if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
4033 return TRUE;
4034
4035 if (!elf_s390_merge_obj_attributes (ibfd, obfd))
4036 return FALSE;
4037
4038 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
4039 return TRUE;
4040 }
4041
4042
4043 #define TARGET_BIG_SYM s390_elf32_vec
4044 #define TARGET_BIG_NAME "elf32-s390"
4045 #define ELF_ARCH bfd_arch_s390
4046 #define ELF_TARGET_ID S390_ELF_DATA
4047 #define ELF_MACHINE_CODE EM_S390
4048 #define ELF_MACHINE_ALT1 EM_S390_OLD
4049 #define ELF_MAXPAGESIZE 0x1000
4050
4051 #define elf_backend_can_gc_sections 1
4052 #define elf_backend_can_refcount 1
4053 #define elf_backend_want_got_plt 1
4054 #define elf_backend_plt_readonly 1
4055 #define elf_backend_want_plt_sym 0
4056 #define elf_backend_got_header_size 12
4057 #define elf_backend_rela_normal 1
4058
4059 #define elf_info_to_howto elf_s390_info_to_howto
4060
4061 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
4062 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
4063 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4064 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4065
4066 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
4067
4068 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4069 #define elf_backend_check_relocs elf_s390_check_relocs
4070 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4071 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
4072 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4073 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4074 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4075 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4076 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4077 #define elf_backend_relocate_section elf_s390_relocate_section
4078 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4079 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4080 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4081 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4082 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4083 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4084
4085 #define bfd_elf32_mkobject elf_s390_mkobject
4086 #define elf_backend_object_p elf_s390_object_p
4087
4088 #include "elf32-target.h"