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2013-07-05 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2010, 2011, 2012 Free Software Foundation, Inc.
4 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/s390.h"
29
30 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
31 from smaller values. Start with zero, widen, *then* decrement. */
32 #define MINUS_ONE (((bfd_vma)0) - 1)
33
34 static bfd_reloc_status_type
35 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
36 asection *, bfd *, char **);
37 static bfd_reloc_status_type
38 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
39 asection *, bfd *, char **);
40
41 /* The relocation "howto" table. */
42 static reloc_howto_type elf_howto_table[] =
43 {
44 HOWTO (R_390_NONE, /* type */
45 0, /* rightshift */
46 0, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
47 0, /* bitsize */
48 FALSE, /* pc_relative */
49 0, /* bitpos */
50 complain_overflow_dont, /* complain_on_overflow */
51 bfd_elf_generic_reloc, /* special_function */
52 "R_390_NONE", /* name */
53 FALSE, /* partial_inplace */
54 0, /* src_mask */
55 0, /* dst_mask */
56 FALSE), /* pcrel_offset */
57
58 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
60 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
61 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
62 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
64 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
66 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
68 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
70 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
72 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
74 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
76 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
78 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
80 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
82 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
84 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
86 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
88 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
90 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
92 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
94 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
96 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
98 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
100 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
102 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
104 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
106 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
108 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
110 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
112 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
114 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
115 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
116 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
118 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
120 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
122 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
124 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
126 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
128 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
130 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
131 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
132 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
133 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
134 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
136 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
137 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
139 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
140 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
141 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
142 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
145 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
147 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
148 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
150 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
152 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
153 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
155 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
156 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
158 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
160 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
162 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
164 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
165 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
166 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
167 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
168 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
169 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
170 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
171 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
172 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
174 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
176 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
178 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
180 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
181 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
182 };
183
184 /* GNU extension to record C++ vtable hierarchy. */
185 static reloc_howto_type elf64_s390_vtinherit_howto =
186 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
187 static reloc_howto_type elf64_s390_vtentry_howto =
188 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
189
190 static reloc_howto_type *
191 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
192 bfd_reloc_code_real_type code)
193 {
194 switch (code)
195 {
196 case BFD_RELOC_NONE:
197 return &elf_howto_table[(int) R_390_NONE];
198 case BFD_RELOC_8:
199 return &elf_howto_table[(int) R_390_8];
200 case BFD_RELOC_390_12:
201 return &elf_howto_table[(int) R_390_12];
202 case BFD_RELOC_16:
203 return &elf_howto_table[(int) R_390_16];
204 case BFD_RELOC_32:
205 return &elf_howto_table[(int) R_390_32];
206 case BFD_RELOC_CTOR:
207 return &elf_howto_table[(int) R_390_32];
208 case BFD_RELOC_32_PCREL:
209 return &elf_howto_table[(int) R_390_PC32];
210 case BFD_RELOC_390_GOT12:
211 return &elf_howto_table[(int) R_390_GOT12];
212 case BFD_RELOC_32_GOT_PCREL:
213 return &elf_howto_table[(int) R_390_GOT32];
214 case BFD_RELOC_390_PLT32:
215 return &elf_howto_table[(int) R_390_PLT32];
216 case BFD_RELOC_390_COPY:
217 return &elf_howto_table[(int) R_390_COPY];
218 case BFD_RELOC_390_GLOB_DAT:
219 return &elf_howto_table[(int) R_390_GLOB_DAT];
220 case BFD_RELOC_390_JMP_SLOT:
221 return &elf_howto_table[(int) R_390_JMP_SLOT];
222 case BFD_RELOC_390_RELATIVE:
223 return &elf_howto_table[(int) R_390_RELATIVE];
224 case BFD_RELOC_32_GOTOFF:
225 return &elf_howto_table[(int) R_390_GOTOFF32];
226 case BFD_RELOC_390_GOTPC:
227 return &elf_howto_table[(int) R_390_GOTPC];
228 case BFD_RELOC_390_GOT16:
229 return &elf_howto_table[(int) R_390_GOT16];
230 case BFD_RELOC_16_PCREL:
231 return &elf_howto_table[(int) R_390_PC16];
232 case BFD_RELOC_390_PC12DBL:
233 return &elf_howto_table[(int) R_390_PC12DBL];
234 case BFD_RELOC_390_PLT12DBL:
235 return &elf_howto_table[(int) R_390_PLT12DBL];
236 case BFD_RELOC_390_PC16DBL:
237 return &elf_howto_table[(int) R_390_PC16DBL];
238 case BFD_RELOC_390_PLT16DBL:
239 return &elf_howto_table[(int) R_390_PLT16DBL];
240 case BFD_RELOC_390_PC24DBL:
241 return &elf_howto_table[(int) R_390_PC24DBL];
242 case BFD_RELOC_390_PLT24DBL:
243 return &elf_howto_table[(int) R_390_PLT24DBL];
244 case BFD_RELOC_390_PC32DBL:
245 return &elf_howto_table[(int) R_390_PC32DBL];
246 case BFD_RELOC_390_PLT32DBL:
247 return &elf_howto_table[(int) R_390_PLT32DBL];
248 case BFD_RELOC_390_GOTPCDBL:
249 return &elf_howto_table[(int) R_390_GOTPCDBL];
250 case BFD_RELOC_64:
251 return &elf_howto_table[(int) R_390_64];
252 case BFD_RELOC_64_PCREL:
253 return &elf_howto_table[(int) R_390_PC64];
254 case BFD_RELOC_390_GOT64:
255 return &elf_howto_table[(int) R_390_GOT64];
256 case BFD_RELOC_390_PLT64:
257 return &elf_howto_table[(int) R_390_PLT64];
258 case BFD_RELOC_390_GOTENT:
259 return &elf_howto_table[(int) R_390_GOTENT];
260 case BFD_RELOC_16_GOTOFF:
261 return &elf_howto_table[(int) R_390_GOTOFF16];
262 case BFD_RELOC_390_GOTOFF64:
263 return &elf_howto_table[(int) R_390_GOTOFF64];
264 case BFD_RELOC_390_GOTPLT12:
265 return &elf_howto_table[(int) R_390_GOTPLT12];
266 case BFD_RELOC_390_GOTPLT16:
267 return &elf_howto_table[(int) R_390_GOTPLT16];
268 case BFD_RELOC_390_GOTPLT32:
269 return &elf_howto_table[(int) R_390_GOTPLT32];
270 case BFD_RELOC_390_GOTPLT64:
271 return &elf_howto_table[(int) R_390_GOTPLT64];
272 case BFD_RELOC_390_GOTPLTENT:
273 return &elf_howto_table[(int) R_390_GOTPLTENT];
274 case BFD_RELOC_390_PLTOFF16:
275 return &elf_howto_table[(int) R_390_PLTOFF16];
276 case BFD_RELOC_390_PLTOFF32:
277 return &elf_howto_table[(int) R_390_PLTOFF32];
278 case BFD_RELOC_390_PLTOFF64:
279 return &elf_howto_table[(int) R_390_PLTOFF64];
280 case BFD_RELOC_390_TLS_LOAD:
281 return &elf_howto_table[(int) R_390_TLS_LOAD];
282 case BFD_RELOC_390_TLS_GDCALL:
283 return &elf_howto_table[(int) R_390_TLS_GDCALL];
284 case BFD_RELOC_390_TLS_LDCALL:
285 return &elf_howto_table[(int) R_390_TLS_LDCALL];
286 case BFD_RELOC_390_TLS_GD64:
287 return &elf_howto_table[(int) R_390_TLS_GD64];
288 case BFD_RELOC_390_TLS_GOTIE12:
289 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
290 case BFD_RELOC_390_TLS_GOTIE64:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
292 case BFD_RELOC_390_TLS_LDM64:
293 return &elf_howto_table[(int) R_390_TLS_LDM64];
294 case BFD_RELOC_390_TLS_IE64:
295 return &elf_howto_table[(int) R_390_TLS_IE64];
296 case BFD_RELOC_390_TLS_IEENT:
297 return &elf_howto_table[(int) R_390_TLS_IEENT];
298 case BFD_RELOC_390_TLS_LE64:
299 return &elf_howto_table[(int) R_390_TLS_LE64];
300 case BFD_RELOC_390_TLS_LDO64:
301 return &elf_howto_table[(int) R_390_TLS_LDO64];
302 case BFD_RELOC_390_TLS_DTPMOD:
303 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
304 case BFD_RELOC_390_TLS_DTPOFF:
305 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
306 case BFD_RELOC_390_TLS_TPOFF:
307 return &elf_howto_table[(int) R_390_TLS_TPOFF];
308 case BFD_RELOC_390_20:
309 return &elf_howto_table[(int) R_390_20];
310 case BFD_RELOC_390_GOT20:
311 return &elf_howto_table[(int) R_390_GOT20];
312 case BFD_RELOC_390_GOTPLT20:
313 return &elf_howto_table[(int) R_390_GOTPLT20];
314 case BFD_RELOC_390_TLS_GOTIE20:
315 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
316 case BFD_RELOC_390_IRELATIVE:
317 return &elf_howto_table[(int) R_390_IRELATIVE];
318 case BFD_RELOC_VTABLE_INHERIT:
319 return &elf64_s390_vtinherit_howto;
320 case BFD_RELOC_VTABLE_ENTRY:
321 return &elf64_s390_vtentry_howto;
322 default:
323 break;
324 }
325 return 0;
326 }
327
328 static reloc_howto_type *
329 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
330 const char *r_name)
331 {
332 unsigned int i;
333
334 for (i = 0;
335 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
336 i++)
337 if (elf_howto_table[i].name != NULL
338 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
339 return &elf_howto_table[i];
340
341 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
342 return &elf64_s390_vtinherit_howto;
343 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
344 return &elf64_s390_vtentry_howto;
345
346 return NULL;
347 }
348
349 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
350 and elf64-s390.c has its own copy. */
351
352 static void
353 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
354 arelent *cache_ptr,
355 Elf_Internal_Rela *dst)
356 {
357 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
358 switch (r_type)
359 {
360 case R_390_GNU_VTINHERIT:
361 cache_ptr->howto = &elf64_s390_vtinherit_howto;
362 break;
363
364 case R_390_GNU_VTENTRY:
365 cache_ptr->howto = &elf64_s390_vtentry_howto;
366 break;
367
368 default:
369 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
370 {
371 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
372 abfd, (int) r_type);
373 r_type = R_390_NONE;
374 }
375 cache_ptr->howto = &elf_howto_table[r_type];
376 }
377 }
378
379 /* A relocation function which doesn't do anything. */
380 static bfd_reloc_status_type
381 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
382 arelent *reloc_entry,
383 asymbol *symbol ATTRIBUTE_UNUSED,
384 void * data ATTRIBUTE_UNUSED,
385 asection *input_section,
386 bfd *output_bfd,
387 char **error_message ATTRIBUTE_UNUSED)
388 {
389 if (output_bfd)
390 reloc_entry->address += input_section->output_offset;
391 return bfd_reloc_ok;
392 }
393
394 /* Handle the large displacement relocs. */
395 static bfd_reloc_status_type
396 s390_elf_ldisp_reloc (bfd *abfd,
397 arelent *reloc_entry,
398 asymbol *symbol,
399 void * data,
400 asection *input_section,
401 bfd *output_bfd,
402 char **error_message ATTRIBUTE_UNUSED)
403 {
404 reloc_howto_type *howto = reloc_entry->howto;
405 bfd_vma relocation;
406 bfd_vma insn;
407
408 if (output_bfd != (bfd *) NULL
409 && (symbol->flags & BSF_SECTION_SYM) == 0
410 && (! howto->partial_inplace
411 || reloc_entry->addend == 0))
412 {
413 reloc_entry->address += input_section->output_offset;
414 return bfd_reloc_ok;
415 }
416 if (output_bfd != NULL)
417 return bfd_reloc_continue;
418
419 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
420 return bfd_reloc_outofrange;
421
422 relocation = (symbol->value
423 + symbol->section->output_section->vma
424 + symbol->section->output_offset);
425 relocation += reloc_entry->addend;
426 if (howto->pc_relative)
427 {
428 relocation -= (input_section->output_section->vma
429 + input_section->output_offset);
430 relocation -= reloc_entry->address;
431 }
432
433 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
434 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
435 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
436
437 if ((bfd_signed_vma) relocation < - 0x80000
438 || (bfd_signed_vma) relocation > 0x7ffff)
439 return bfd_reloc_overflow;
440 else
441 return bfd_reloc_ok;
442 }
443
444 static bfd_boolean
445 elf_s390_is_local_label_name (bfd *abfd, const char *name)
446 {
447 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
448 return TRUE;
449
450 return _bfd_elf_is_local_label_name (abfd, name);
451 }
452
453 /* Functions for the 390 ELF linker. */
454
455 /* The name of the dynamic interpreter. This is put in the .interp
456 section. */
457
458 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
459
460 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
461 copying dynamic variables from a shared lib into an app's dynbss
462 section, and instead use a dynamic relocation to point into the
463 shared lib. */
464 #define ELIMINATE_COPY_RELOCS 1
465
466 /* The size in bytes of the first entry in the procedure linkage table. */
467 #define PLT_FIRST_ENTRY_SIZE 32
468 /* The size in bytes of an entry in the procedure linkage table. */
469 #define PLT_ENTRY_SIZE 32
470
471 #define GOT_ENTRY_SIZE 8
472
473 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
474
475 /* The first three entries in a procedure linkage table are reserved,
476 and the initial contents are unimportant (we zero them out).
477 Subsequent entries look like this. See the SVR4 ABI 386
478 supplement to see how this works. */
479
480 /* For the s390, simple addr offset can only be 0 - 4096.
481 To use the full 16777216 TB address space, several instructions
482 are needed to load an address in a register and execute
483 a branch( or just saving the address)
484
485 Furthermore, only r 0 and 1 are free to use!!! */
486
487 /* The first 3 words in the GOT are then reserved.
488 Word 0 is the address of the dynamic table.
489 Word 1 is a pointer to a structure describing the object
490 Word 2 is used to point to the loader entry address.
491
492 The code for PLT entries looks like this:
493
494 The GOT holds the address in the PLT to be executed.
495 The loader then gets:
496 24(15) = Pointer to the structure describing the object.
497 28(15) = Offset in symbol table
498 The loader must then find the module where the function is
499 and insert the address in the GOT.
500
501 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
502 LG 1,0(1) # 6 bytes Load address from GOT in r1
503 BCR 15,1 # 2 bytes Jump to address
504 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
505 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
506 BRCL 15,-x # 6 bytes Jump to start of PLT
507 .long ? # 4 bytes offset into .rela.plt
508
509 Total = 32 bytes per PLT entry
510 Fixup at offset 2: relative address to GOT entry
511 Fixup at offset 22: relative branch to PLT0
512 Fixup at offset 28: 32 bit offset into .rela.plt
513
514 A 32 bit offset into the symbol table is enough. It allows for
515 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
516 object (the main program, any shared library) is limited to 4GB in
517 size. Having a .rela.plt of 2GB would already make the .plt
518 section bigger than 8GB. */
519
520 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
521 {
522 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
523 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
524 0x07, 0xf1, /* br %r1 */
525 0x0d, 0x10, /* basr %r1,%r0 */
526 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
527 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
528 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
529 };
530
531 /* The first PLT entry pushes the offset into the symbol table
532 from R1 onto the stack at 56(15) and the loader object info
533 at 48(15), loads the loader address in R1 and jumps to it. */
534
535 /* The first entry in the PLT:
536
537 PLT0:
538 STG 1,56(15) # r1 contains the offset into the symbol table
539 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
540 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
541 LG 1,16(1) # get entry address of loader
542 BCR 15,1 # jump to loader
543
544 Fixup at offset 8: relative address to start of GOT. */
545
546 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
547 {
548 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
549 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
550 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
551 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
552 0x07, 0xf1, /* br %r1 */
553 0x07, 0x00, /* nopr %r0 */
554 0x07, 0x00, /* nopr %r0 */
555 0x07, 0x00 /* nopr %r0 */
556 };
557
558
559 /* s390 ELF linker hash entry. */
560
561 struct elf_s390_link_hash_entry
562 {
563 struct elf_link_hash_entry elf;
564
565 /* Track dynamic relocs copied for this symbol. */
566 struct elf_dyn_relocs *dyn_relocs;
567
568 /* Number of GOTPLT references for a function. */
569 bfd_signed_vma gotplt_refcount;
570
571 #define GOT_UNKNOWN 0
572 #define GOT_NORMAL 1
573 #define GOT_TLS_GD 2
574 #define GOT_TLS_IE 3
575 #define GOT_TLS_IE_NLT 3
576 unsigned char tls_type;
577
578 /* For pointer equality reasons we might need to change the symbol
579 type from STT_GNU_IFUNC to STT_FUNC together with its value and
580 section entry. So after alloc_dynrelocs only these values should
581 be used. In order to check whether a symbol is IFUNC use
582 s390_is_ifunc_symbol_p. */
583 bfd_vma ifunc_resolver_address;
584 asection *ifunc_resolver_section;
585 };
586
587 #define elf_s390_hash_entry(ent) \
588 ((struct elf_s390_link_hash_entry *)(ent))
589
590 /* This structure represents an entry in the local PLT list needed for
591 local IFUNC symbols. */
592 struct plt_entry
593 {
594 /* The section of the local symbol.
595 Set in relocate_section and used in finish_dynamic_sections. */
596 asection *sec;
597
598 union
599 {
600 bfd_signed_vma refcount;
601 bfd_vma offset;
602 } plt;
603 };
604
605 /* NOTE: Keep this structure in sync with
606 the one declared in elf32-s390.c. */
607 struct elf_s390_obj_tdata
608 {
609 struct elf_obj_tdata root;
610
611 /* A local PLT is needed for ifunc symbols. */
612 struct plt_entry *local_plt;
613
614 /* TLS type for each local got entry. */
615 char *local_got_tls_type;
616 };
617
618 #define elf_s390_tdata(abfd) \
619 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
620
621 #define elf_s390_local_plt(abfd) \
622 (elf_s390_tdata (abfd)->local_plt)
623
624 #define elf_s390_local_got_tls_type(abfd) \
625 (elf_s390_tdata (abfd)->local_got_tls_type)
626
627 #define is_s390_elf(bfd) \
628 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
629 && elf_tdata (bfd) != NULL \
630 && elf_object_id (bfd) == S390_ELF_DATA)
631
632 static bfd_boolean
633 elf_s390_mkobject (bfd *abfd)
634 {
635 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
636 S390_ELF_DATA);
637 }
638
639 static bfd_boolean
640 elf_s390_object_p (bfd *abfd)
641 {
642 /* Set the right machine number for an s390 elf32 file. */
643 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
644 }
645
646 /* s390 ELF linker hash table. */
647
648 struct elf_s390_link_hash_table
649 {
650 struct elf_link_hash_table elf;
651
652 /* Short-cuts to get to dynamic linker sections. */
653 asection *sdynbss;
654 asection *srelbss;
655 asection *irelifunc;
656
657 union {
658 bfd_signed_vma refcount;
659 bfd_vma offset;
660 } tls_ldm_got;
661
662 /* Small local sym cache. */
663 struct sym_cache sym_cache;
664 };
665
666 /* Get the s390 ELF linker hash table from a link_info structure. */
667
668 #define elf_s390_hash_table(p) \
669 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
670 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
671
672 #define ELF64 1
673 #include "elf-s390-common.c"
674
675 /* Create an entry in an s390 ELF linker hash table. */
676
677 static struct bfd_hash_entry *
678 link_hash_newfunc (struct bfd_hash_entry *entry,
679 struct bfd_hash_table *table,
680 const char *string)
681 {
682 /* Allocate the structure if it has not already been allocated by a
683 subclass. */
684 if (entry == NULL)
685 {
686 entry = bfd_hash_allocate (table,
687 sizeof (struct elf_s390_link_hash_entry));
688 if (entry == NULL)
689 return entry;
690 }
691
692 /* Call the allocation method of the superclass. */
693 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
694 if (entry != NULL)
695 {
696 struct elf_s390_link_hash_entry *eh;
697
698 eh = (struct elf_s390_link_hash_entry *) entry;
699 eh->dyn_relocs = NULL;
700 eh->gotplt_refcount = 0;
701 eh->tls_type = GOT_UNKNOWN;
702 eh->ifunc_resolver_address = 0;
703 eh->ifunc_resolver_section = NULL;
704 }
705
706 return entry;
707 }
708
709 /* Create an s390 ELF linker hash table. */
710
711 static struct bfd_link_hash_table *
712 elf_s390_link_hash_table_create (bfd *abfd)
713 {
714 struct elf_s390_link_hash_table *ret;
715 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
716
717 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
718 if (ret == NULL)
719 return NULL;
720
721 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
722 sizeof (struct elf_s390_link_hash_entry),
723 S390_ELF_DATA))
724 {
725 free (ret);
726 return NULL;
727 }
728
729 return &ret->elf.root;
730 }
731
732 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
733 shortcuts to them in our hash table. */
734
735 static bfd_boolean
736 create_got_section (bfd *dynobj,
737 struct bfd_link_info *info)
738 {
739 struct elf_s390_link_hash_table *htab;
740
741 if (! _bfd_elf_create_got_section (dynobj, info))
742 return FALSE;
743
744 htab = elf_s390_hash_table (info);
745 if (htab == NULL)
746 return FALSE;
747
748 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
749 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
750 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
751 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
752 abort ();
753 return TRUE;
754 }
755
756 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
757 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
758 hash table. */
759
760 static bfd_boolean
761 elf_s390_create_dynamic_sections (bfd *dynobj,
762 struct bfd_link_info *info)
763 {
764 struct elf_s390_link_hash_table *htab;
765
766 htab = elf_s390_hash_table (info);
767 if (htab == NULL)
768 return FALSE;
769
770 if (!htab->elf.sgot && !create_got_section (dynobj, info))
771 return FALSE;
772
773 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
774 return FALSE;
775
776 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
777 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
778 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
779 if (!info->shared)
780 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
781
782 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
783 || (!info->shared && !htab->srelbss))
784 abort ();
785
786 return TRUE;
787 }
788
789 /* Copy the extra info we tack onto an elf_link_hash_entry. */
790
791 static void
792 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
793 struct elf_link_hash_entry *dir,
794 struct elf_link_hash_entry *ind)
795 {
796 struct elf_s390_link_hash_entry *edir, *eind;
797
798 edir = (struct elf_s390_link_hash_entry *) dir;
799 eind = (struct elf_s390_link_hash_entry *) ind;
800
801 if (eind->dyn_relocs != NULL)
802 {
803 if (edir->dyn_relocs != NULL)
804 {
805 struct elf_dyn_relocs **pp;
806 struct elf_dyn_relocs *p;
807
808 /* Add reloc counts against the indirect sym to the direct sym
809 list. Merge any entries against the same section. */
810 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
811 {
812 struct elf_dyn_relocs *q;
813
814 for (q = edir->dyn_relocs; q != NULL; q = q->next)
815 if (q->sec == p->sec)
816 {
817 q->pc_count += p->pc_count;
818 q->count += p->count;
819 *pp = p->next;
820 break;
821 }
822 if (q == NULL)
823 pp = &p->next;
824 }
825 *pp = edir->dyn_relocs;
826 }
827
828 edir->dyn_relocs = eind->dyn_relocs;
829 eind->dyn_relocs = NULL;
830 }
831
832 if (ind->root.type == bfd_link_hash_indirect
833 && dir->got.refcount <= 0)
834 {
835 edir->tls_type = eind->tls_type;
836 eind->tls_type = GOT_UNKNOWN;
837 }
838
839 if (ELIMINATE_COPY_RELOCS
840 && ind->root.type != bfd_link_hash_indirect
841 && dir->dynamic_adjusted)
842 {
843 /* If called to transfer flags for a weakdef during processing
844 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
845 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
846 dir->ref_dynamic |= ind->ref_dynamic;
847 dir->ref_regular |= ind->ref_regular;
848 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
849 dir->needs_plt |= ind->needs_plt;
850 }
851 else
852 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
853 }
854
855 static int
856 elf_s390_tls_transition (struct bfd_link_info *info,
857 int r_type,
858 int is_local)
859 {
860 if (info->shared)
861 return r_type;
862
863 switch (r_type)
864 {
865 case R_390_TLS_GD64:
866 case R_390_TLS_IE64:
867 if (is_local)
868 return R_390_TLS_LE64;
869 return R_390_TLS_IE64;
870 case R_390_TLS_GOTIE64:
871 if (is_local)
872 return R_390_TLS_LE64;
873 return R_390_TLS_GOTIE64;
874 case R_390_TLS_LDM64:
875 return R_390_TLS_LE64;
876 }
877
878 return r_type;
879 }
880
881 /* Look through the relocs for a section during the first phase, and
882 allocate space in the global offset table or procedure linkage
883 table. */
884
885 static bfd_boolean
886 elf_s390_check_relocs (bfd *abfd,
887 struct bfd_link_info *info,
888 asection *sec,
889 const Elf_Internal_Rela *relocs)
890 {
891 struct elf_s390_link_hash_table *htab;
892 Elf_Internal_Shdr *symtab_hdr;
893 struct elf_link_hash_entry **sym_hashes;
894 const Elf_Internal_Rela *rel;
895 const Elf_Internal_Rela *rel_end;
896 asection *sreloc;
897 bfd_signed_vma *local_got_refcounts;
898 int tls_type, old_tls_type;
899
900 if (info->relocatable)
901 return TRUE;
902
903 BFD_ASSERT (is_s390_elf (abfd));
904
905 htab = elf_s390_hash_table (info);
906 if (htab == NULL)
907 return FALSE;
908
909 symtab_hdr = &elf_symtab_hdr (abfd);
910 sym_hashes = elf_sym_hashes (abfd);
911 local_got_refcounts = elf_local_got_refcounts (abfd);
912
913 sreloc = NULL;
914
915 rel_end = relocs + sec->reloc_count;
916 for (rel = relocs; rel < rel_end; rel++)
917 {
918 unsigned int r_type;
919 unsigned long r_symndx;
920 struct elf_link_hash_entry *h;
921 Elf_Internal_Sym *isym;
922
923 r_symndx = ELF64_R_SYM (rel->r_info);
924
925 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
926 {
927 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
928 abfd,
929 r_symndx);
930 return FALSE;
931 }
932
933 if (r_symndx < symtab_hdr->sh_info)
934 {
935 /* A local symbol. */
936 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
937 abfd, r_symndx);
938 if (isym == NULL)
939 return FALSE;
940
941 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
942 {
943 struct plt_entry *plt;
944
945 if (htab->elf.dynobj == NULL)
946 htab->elf.dynobj = abfd;
947
948 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
949 return FALSE;
950
951 if (local_got_refcounts == NULL)
952 {
953 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
954 return FALSE;
955 local_got_refcounts = elf_local_got_refcounts (abfd);
956 }
957 plt = elf_s390_local_plt (abfd);
958 plt[r_symndx].plt.refcount++;
959 }
960 h = NULL;
961 }
962 else
963 {
964 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
965 while (h->root.type == bfd_link_hash_indirect
966 || h->root.type == bfd_link_hash_warning)
967 h = (struct elf_link_hash_entry *) h->root.u.i.link;
968
969 /* PR15323, ref flags aren't set for references in the same
970 object. */
971 h->root.non_ir_ref = 1;
972 }
973
974 /* Create got section and local_got_refcounts array if they
975 are needed. */
976 r_type = elf_s390_tls_transition (info,
977 ELF64_R_TYPE (rel->r_info),
978 h == NULL);
979 switch (r_type)
980 {
981 case R_390_GOT12:
982 case R_390_GOT16:
983 case R_390_GOT20:
984 case R_390_GOT32:
985 case R_390_GOT64:
986 case R_390_GOTENT:
987 case R_390_GOTPLT12:
988 case R_390_GOTPLT16:
989 case R_390_GOTPLT20:
990 case R_390_GOTPLT32:
991 case R_390_GOTPLT64:
992 case R_390_GOTPLTENT:
993 case R_390_TLS_GD64:
994 case R_390_TLS_GOTIE12:
995 case R_390_TLS_GOTIE20:
996 case R_390_TLS_GOTIE64:
997 case R_390_TLS_IEENT:
998 case R_390_TLS_IE64:
999 case R_390_TLS_LDM64:
1000 if (h == NULL
1001 && local_got_refcounts == NULL)
1002 {
1003 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1004 return FALSE;
1005 local_got_refcounts = elf_local_got_refcounts (abfd);
1006 }
1007
1008 /* Fall through. */
1009 case R_390_GOTOFF16:
1010 case R_390_GOTOFF32:
1011 case R_390_GOTOFF64:
1012 case R_390_GOTPC:
1013 case R_390_GOTPCDBL:
1014 if (htab->elf.sgot == NULL)
1015 {
1016 if (htab->elf.dynobj == NULL)
1017 htab->elf.dynobj = abfd;
1018 if (!create_got_section (htab->elf.dynobj, info))
1019 return FALSE;
1020 }
1021 }
1022
1023 if (h != NULL)
1024 {
1025 if (htab->elf.dynobj == NULL)
1026 htab->elf.dynobj = abfd;
1027 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1028 return FALSE;
1029
1030 /* Make sure an IFUNC symbol defined in a non-shared object
1031 always gets a PLT slot. */
1032 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1033 {
1034 /* The symbol is called by the dynamic loader in order
1035 to resolve the relocation. So it is in fact also
1036 referenced. */
1037 h->ref_regular = 1;
1038 h->needs_plt = 1;
1039 }
1040 }
1041
1042 switch (r_type)
1043 {
1044 case R_390_GOTOFF16:
1045 case R_390_GOTOFF32:
1046 case R_390_GOTOFF64:
1047 case R_390_GOTPC:
1048 case R_390_GOTPCDBL:
1049 /* These relocs do not need a GOT slot. They just load the
1050 GOT pointer itself or address something else relative to
1051 the GOT. Since the GOT pointer has been set up above we
1052 are done. */
1053 break;
1054
1055 case R_390_PLT12DBL:
1056 case R_390_PLT16DBL:
1057 case R_390_PLT24DBL:
1058 case R_390_PLT32:
1059 case R_390_PLT32DBL:
1060 case R_390_PLT64:
1061 case R_390_PLTOFF16:
1062 case R_390_PLTOFF32:
1063 case R_390_PLTOFF64:
1064 /* This symbol requires a procedure linkage table entry. We
1065 actually build the entry in adjust_dynamic_symbol,
1066 because this might be a case of linking PIC code which is
1067 never referenced by a dynamic object, in which case we
1068 don't need to generate a procedure linkage table entry
1069 after all. */
1070
1071 /* If this is a local symbol, we resolve it directly without
1072 creating a procedure linkage table entry. */
1073 if (h != NULL)
1074 {
1075 h->needs_plt = 1;
1076 h->plt.refcount += 1;
1077 }
1078 break;
1079
1080 case R_390_GOTPLT12:
1081 case R_390_GOTPLT16:
1082 case R_390_GOTPLT20:
1083 case R_390_GOTPLT32:
1084 case R_390_GOTPLT64:
1085 case R_390_GOTPLTENT:
1086 /* This symbol requires either a procedure linkage table entry
1087 or an entry in the local got. We actually build the entry
1088 in adjust_dynamic_symbol because whether this is really a
1089 global reference can change and with it the fact if we have
1090 to create a plt entry or a local got entry. To be able to
1091 make a once global symbol a local one we have to keep track
1092 of the number of gotplt references that exist for this
1093 symbol. */
1094 if (h != NULL)
1095 {
1096 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1097 h->needs_plt = 1;
1098 h->plt.refcount += 1;
1099 }
1100 else
1101 local_got_refcounts[r_symndx] += 1;
1102 break;
1103
1104 case R_390_TLS_LDM64:
1105 htab->tls_ldm_got.refcount += 1;
1106 break;
1107
1108 case R_390_TLS_IE64:
1109 case R_390_TLS_GOTIE12:
1110 case R_390_TLS_GOTIE20:
1111 case R_390_TLS_GOTIE64:
1112 case R_390_TLS_IEENT:
1113 if (info->shared)
1114 info->flags |= DF_STATIC_TLS;
1115 /* Fall through */
1116
1117 case R_390_GOT12:
1118 case R_390_GOT16:
1119 case R_390_GOT20:
1120 case R_390_GOT32:
1121 case R_390_GOT64:
1122 case R_390_GOTENT:
1123 case R_390_TLS_GD64:
1124 /* This symbol requires a global offset table entry. */
1125 switch (r_type)
1126 {
1127 default:
1128 case R_390_GOT12:
1129 case R_390_GOT16:
1130 case R_390_GOT20:
1131 case R_390_GOT32:
1132 case R_390_GOTENT:
1133 tls_type = GOT_NORMAL;
1134 break;
1135 case R_390_TLS_GD64:
1136 tls_type = GOT_TLS_GD;
1137 break;
1138 case R_390_TLS_IE64:
1139 case R_390_TLS_GOTIE64:
1140 tls_type = GOT_TLS_IE;
1141 break;
1142 case R_390_TLS_GOTIE12:
1143 case R_390_TLS_GOTIE20:
1144 case R_390_TLS_IEENT:
1145 tls_type = GOT_TLS_IE_NLT;
1146 break;
1147 }
1148
1149 if (h != NULL)
1150 {
1151 h->got.refcount += 1;
1152 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1153 }
1154 else
1155 {
1156 local_got_refcounts[r_symndx] += 1;
1157 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1158 }
1159 /* If a TLS symbol is accessed using IE at least once,
1160 there is no point to use dynamic model for it. */
1161 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1162 {
1163 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1164 {
1165 (*_bfd_error_handler)
1166 (_("%B: `%s' accessed both as normal and thread local symbol"),
1167 abfd, h->root.root.string);
1168 return FALSE;
1169 }
1170 if (old_tls_type > tls_type)
1171 tls_type = old_tls_type;
1172 }
1173
1174 if (old_tls_type != tls_type)
1175 {
1176 if (h != NULL)
1177 elf_s390_hash_entry (h)->tls_type = tls_type;
1178 else
1179 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1180 }
1181
1182 if (r_type != R_390_TLS_IE64)
1183 break;
1184 /* Fall through */
1185
1186 case R_390_TLS_LE64:
1187 if (!info->shared)
1188 break;
1189 info->flags |= DF_STATIC_TLS;
1190 /* Fall through */
1191
1192 case R_390_8:
1193 case R_390_16:
1194 case R_390_32:
1195 case R_390_64:
1196 case R_390_PC12DBL:
1197 case R_390_PC16:
1198 case R_390_PC16DBL:
1199 case R_390_PC24DBL:
1200 case R_390_PC32:
1201 case R_390_PC32DBL:
1202 case R_390_PC64:
1203 if (h != NULL)
1204 {
1205 /* If this reloc is in a read-only section, we might
1206 need a copy reloc. We can't check reliably at this
1207 stage whether the section is read-only, as input
1208 sections have not yet been mapped to output sections.
1209 Tentatively set the flag for now, and correct in
1210 adjust_dynamic_symbol. */
1211 h->non_got_ref = 1;
1212
1213 if (!info->shared)
1214 {
1215 /* We may need a .plt entry if the function this reloc
1216 refers to is in a shared lib. */
1217 h->plt.refcount += 1;
1218 }
1219 }
1220
1221 /* If we are creating a shared library, and this is a reloc
1222 against a global symbol, or a non PC relative reloc
1223 against a local symbol, then we need to copy the reloc
1224 into the shared library. However, if we are linking with
1225 -Bsymbolic, we do not need to copy a reloc against a
1226 global symbol which is defined in an object we are
1227 including in the link (i.e., DEF_REGULAR is set). At
1228 this point we have not seen all the input files, so it is
1229 possible that DEF_REGULAR is not set now but will be set
1230 later (it is never cleared). In case of a weak definition,
1231 DEF_REGULAR may be cleared later by a strong definition in
1232 a shared library. We account for that possibility below by
1233 storing information in the relocs_copied field of the hash
1234 table entry. A similar situation occurs when creating
1235 shared libraries and symbol visibility changes render the
1236 symbol local.
1237
1238 If on the other hand, we are creating an executable, we
1239 may need to keep relocations for symbols satisfied by a
1240 dynamic library if we manage to avoid copy relocs for the
1241 symbol. */
1242 if ((info->shared
1243 && (sec->flags & SEC_ALLOC) != 0
1244 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1245 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1246 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1247 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1248 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1249 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1250 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1251 || (h != NULL
1252 && (! SYMBOLIC_BIND (info, h)
1253 || h->root.type == bfd_link_hash_defweak
1254 || !h->def_regular))))
1255 || (ELIMINATE_COPY_RELOCS
1256 && !info->shared
1257 && (sec->flags & SEC_ALLOC) != 0
1258 && h != NULL
1259 && (h->root.type == bfd_link_hash_defweak
1260 || !h->def_regular)))
1261 {
1262 struct elf_dyn_relocs *p;
1263 struct elf_dyn_relocs **head;
1264
1265 /* We must copy these reloc types into the output file.
1266 Create a reloc section in dynobj and make room for
1267 this reloc. */
1268 if (sreloc == NULL)
1269 {
1270 if (htab->elf.dynobj == NULL)
1271 htab->elf.dynobj = abfd;
1272
1273 sreloc = _bfd_elf_make_dynamic_reloc_section
1274 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1275
1276 if (sreloc == NULL)
1277 return FALSE;
1278 }
1279
1280 /* If this is a global symbol, we count the number of
1281 relocations we need for this symbol. */
1282 if (h != NULL)
1283 {
1284 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1285 }
1286 else
1287 {
1288 /* Track dynamic relocs needed for local syms too.
1289 We really need local syms available to do this
1290 easily. Oh well. */
1291 asection *s;
1292 void *vpp;
1293
1294 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1295 abfd, r_symndx);
1296 if (isym == NULL)
1297 return FALSE;
1298
1299 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1300 if (s == NULL)
1301 s = sec;
1302
1303 vpp = &elf_section_data (s)->local_dynrel;
1304 head = (struct elf_dyn_relocs **) vpp;
1305 }
1306
1307 p = *head;
1308 if (p == NULL || p->sec != sec)
1309 {
1310 bfd_size_type amt = sizeof *p;
1311 p = ((struct elf_dyn_relocs *)
1312 bfd_alloc (htab->elf.dynobj, amt));
1313 if (p == NULL)
1314 return FALSE;
1315 p->next = *head;
1316 *head = p;
1317 p->sec = sec;
1318 p->count = 0;
1319 p->pc_count = 0;
1320 }
1321
1322 p->count += 1;
1323 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1324 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1325 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1326 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1327 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1328 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1329 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1330 p->pc_count += 1;
1331 }
1332 break;
1333
1334 /* This relocation describes the C++ object vtable hierarchy.
1335 Reconstruct it for later use during GC. */
1336 case R_390_GNU_VTINHERIT:
1337 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1338 return FALSE;
1339 break;
1340
1341 /* This relocation describes which C++ vtable entries are actually
1342 used. Record for later use during GC. */
1343 case R_390_GNU_VTENTRY:
1344 BFD_ASSERT (h != NULL);
1345 if (h != NULL
1346 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1347 return FALSE;
1348 break;
1349
1350 default:
1351 break;
1352 }
1353 }
1354
1355 return TRUE;
1356 }
1357
1358 /* Return the section that should be marked against GC for a given
1359 relocation. */
1360
1361 static asection *
1362 elf_s390_gc_mark_hook (asection *sec,
1363 struct bfd_link_info *info,
1364 Elf_Internal_Rela *rel,
1365 struct elf_link_hash_entry *h,
1366 Elf_Internal_Sym *sym)
1367 {
1368 if (h != NULL)
1369 switch (ELF64_R_TYPE (rel->r_info))
1370 {
1371 case R_390_GNU_VTINHERIT:
1372 case R_390_GNU_VTENTRY:
1373 return NULL;
1374 }
1375
1376 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1377 }
1378
1379 /* Update the got entry reference counts for the section being removed. */
1380
1381 static bfd_boolean
1382 elf_s390_gc_sweep_hook (bfd *abfd,
1383 struct bfd_link_info *info,
1384 asection *sec,
1385 const Elf_Internal_Rela *relocs)
1386 {
1387 struct elf_s390_link_hash_table *htab;
1388 Elf_Internal_Shdr *symtab_hdr;
1389 struct elf_link_hash_entry **sym_hashes;
1390 bfd_signed_vma *local_got_refcounts;
1391 const Elf_Internal_Rela *rel, *relend;
1392
1393 if (info->relocatable)
1394 return TRUE;
1395
1396 htab = elf_s390_hash_table (info);
1397 if (htab == NULL)
1398 return FALSE;
1399
1400 elf_section_data (sec)->local_dynrel = NULL;
1401
1402 symtab_hdr = &elf_symtab_hdr (abfd);
1403 sym_hashes = elf_sym_hashes (abfd);
1404 local_got_refcounts = elf_local_got_refcounts (abfd);
1405
1406 relend = relocs + sec->reloc_count;
1407 for (rel = relocs; rel < relend; rel++)
1408 {
1409 unsigned long r_symndx;
1410 unsigned int r_type;
1411 struct elf_link_hash_entry *h = NULL;
1412
1413 r_symndx = ELF64_R_SYM (rel->r_info);
1414 if (r_symndx >= symtab_hdr->sh_info)
1415 {
1416 struct elf_s390_link_hash_entry *eh;
1417 struct elf_dyn_relocs **pp;
1418 struct elf_dyn_relocs *p;
1419
1420 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1421 while (h->root.type == bfd_link_hash_indirect
1422 || h->root.type == bfd_link_hash_warning)
1423 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1424 eh = (struct elf_s390_link_hash_entry *) h;
1425
1426 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1427 if (p->sec == sec)
1428 {
1429 /* Everything must go for SEC. */
1430 *pp = p->next;
1431 break;
1432 }
1433 }
1434 else
1435 {
1436 Elf_Internal_Sym *isym;
1437
1438 /* A local symbol. */
1439 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1440 abfd, r_symndx);
1441 if (isym == NULL)
1442 return FALSE;
1443
1444 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1445 {
1446 struct plt_entry *plt = elf_s390_local_plt (abfd);
1447 if (plt[r_symndx].plt.refcount > 0)
1448 plt[r_symndx].plt.refcount--;
1449 }
1450 }
1451
1452 r_type = ELF64_R_TYPE (rel->r_info);
1453 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1454 switch (r_type)
1455 {
1456 case R_390_TLS_LDM64:
1457 if (htab->tls_ldm_got.refcount > 0)
1458 htab->tls_ldm_got.refcount -= 1;
1459 break;
1460
1461 case R_390_TLS_GD64:
1462 case R_390_TLS_IE64:
1463 case R_390_TLS_GOTIE12:
1464 case R_390_TLS_GOTIE20:
1465 case R_390_TLS_GOTIE64:
1466 case R_390_TLS_IEENT:
1467 case R_390_GOT12:
1468 case R_390_GOT16:
1469 case R_390_GOT20:
1470 case R_390_GOT32:
1471 case R_390_GOT64:
1472 case R_390_GOTOFF16:
1473 case R_390_GOTOFF32:
1474 case R_390_GOTOFF64:
1475 case R_390_GOTPC:
1476 case R_390_GOTPCDBL:
1477 case R_390_GOTENT:
1478 if (h != NULL)
1479 {
1480 if (h->got.refcount > 0)
1481 h->got.refcount -= 1;
1482 }
1483 else if (local_got_refcounts != NULL)
1484 {
1485 if (local_got_refcounts[r_symndx] > 0)
1486 local_got_refcounts[r_symndx] -= 1;
1487 }
1488 break;
1489
1490 case R_390_8:
1491 case R_390_12:
1492 case R_390_16:
1493 case R_390_20:
1494 case R_390_32:
1495 case R_390_64:
1496 case R_390_PC16:
1497 case R_390_PC12DBL:
1498 case R_390_PC16DBL:
1499 case R_390_PC24DBL:
1500 case R_390_PC32:
1501 case R_390_PC32DBL:
1502 case R_390_PC64:
1503 if (info->shared)
1504 break;
1505 /* Fall through */
1506
1507 case R_390_PLT12DBL:
1508 case R_390_PLT16DBL:
1509 case R_390_PLT24DBL:
1510 case R_390_PLT32:
1511 case R_390_PLT32DBL:
1512 case R_390_PLT64:
1513 case R_390_PLTOFF16:
1514 case R_390_PLTOFF32:
1515 case R_390_PLTOFF64:
1516 if (h != NULL)
1517 {
1518 if (h->plt.refcount > 0)
1519 h->plt.refcount -= 1;
1520 }
1521 break;
1522
1523 case R_390_GOTPLT12:
1524 case R_390_GOTPLT16:
1525 case R_390_GOTPLT20:
1526 case R_390_GOTPLT32:
1527 case R_390_GOTPLT64:
1528 case R_390_GOTPLTENT:
1529 if (h != NULL)
1530 {
1531 if (h->plt.refcount > 0)
1532 {
1533 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1534 h->plt.refcount -= 1;
1535 }
1536 }
1537 else if (local_got_refcounts != NULL)
1538 {
1539 if (local_got_refcounts[r_symndx] > 0)
1540 local_got_refcounts[r_symndx] -= 1;
1541 }
1542 break;
1543
1544 default:
1545 break;
1546 }
1547 }
1548
1549 return TRUE;
1550 }
1551
1552 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1553 entry but we found we will not create any. Called when we find we will
1554 not have any PLT for this symbol, by for example
1555 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1556 or elf_s390_size_dynamic_sections if no dynamic sections will be
1557 created (we're only linking static objects). */
1558
1559 static void
1560 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1561 {
1562 if (h->elf.root.type == bfd_link_hash_warning)
1563 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1564
1565 if (h->gotplt_refcount <= 0)
1566 return;
1567
1568 /* We simply add the number of gotplt references to the number
1569 * of got references for this symbol. */
1570 h->elf.got.refcount += h->gotplt_refcount;
1571 h->gotplt_refcount = -1;
1572 }
1573
1574 /* Adjust a symbol defined by a dynamic object and referenced by a
1575 regular object. The current definition is in some section of the
1576 dynamic object, but we're not including those sections. We have to
1577 change the definition to something the rest of the link can
1578 understand. */
1579
1580 static bfd_boolean
1581 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1582 struct elf_link_hash_entry *h)
1583 {
1584 struct elf_s390_link_hash_table *htab;
1585 asection *s;
1586
1587 /* STT_GNU_IFUNC symbol must go through PLT. */
1588 if (s390_is_ifunc_symbol_p (h))
1589 return TRUE;
1590
1591 /* If this is a function, put it in the procedure linkage table. We
1592 will fill in the contents of the procedure linkage table later
1593 (although we could actually do it here). */
1594 if (h->type == STT_FUNC
1595 || h->needs_plt)
1596 {
1597 if (h->plt.refcount <= 0
1598 || SYMBOL_CALLS_LOCAL (info, h)
1599 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1600 && h->root.type == bfd_link_hash_undefweak))
1601 {
1602 /* This case can occur if we saw a PLT32 reloc in an input
1603 file, but the symbol was never referred to by a dynamic
1604 object, or if all references were garbage collected. In
1605 such a case, we don't actually need to build a procedure
1606 linkage table, and we can just do a PC32 reloc instead. */
1607 h->plt.offset = (bfd_vma) -1;
1608 h->needs_plt = 0;
1609 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1610 }
1611
1612 return TRUE;
1613 }
1614 else
1615 /* It's possible that we incorrectly decided a .plt reloc was
1616 needed for an R_390_PC32 reloc to a non-function sym in
1617 check_relocs. We can't decide accurately between function and
1618 non-function syms in check-relocs; Objects loaded later in
1619 the link may change h->type. So fix it now. */
1620 h->plt.offset = (bfd_vma) -1;
1621
1622 /* If this is a weak symbol, and there is a real definition, the
1623 processor independent code will have arranged for us to see the
1624 real definition first, and we can just use the same value. */
1625 if (h->u.weakdef != NULL)
1626 {
1627 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1628 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1629 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1630 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1631 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1632 h->non_got_ref = h->u.weakdef->non_got_ref;
1633 return TRUE;
1634 }
1635
1636 /* This is a reference to a symbol defined by a dynamic object which
1637 is not a function. */
1638
1639 /* If we are creating a shared library, we must presume that the
1640 only references to the symbol are via the global offset table.
1641 For such cases we need not do anything here; the relocations will
1642 be handled correctly by relocate_section. */
1643 if (info->shared)
1644 return TRUE;
1645
1646 /* If there are no references to this symbol that do not use the
1647 GOT, we don't need to generate a copy reloc. */
1648 if (!h->non_got_ref)
1649 return TRUE;
1650
1651 /* If -z nocopyreloc was given, we won't generate them either. */
1652 if (info->nocopyreloc)
1653 {
1654 h->non_got_ref = 0;
1655 return TRUE;
1656 }
1657
1658 if (ELIMINATE_COPY_RELOCS)
1659 {
1660 struct elf_s390_link_hash_entry * eh;
1661 struct elf_dyn_relocs *p;
1662
1663 eh = (struct elf_s390_link_hash_entry *) h;
1664 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1665 {
1666 s = p->sec->output_section;
1667 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1668 break;
1669 }
1670
1671 /* If we didn't find any dynamic relocs in read-only sections, then
1672 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1673 if (p == NULL)
1674 {
1675 h->non_got_ref = 0;
1676 return TRUE;
1677 }
1678 }
1679
1680 /* We must allocate the symbol in our .dynbss section, which will
1681 become part of the .bss section of the executable. There will be
1682 an entry for this symbol in the .dynsym section. The dynamic
1683 object will contain position independent code, so all references
1684 from the dynamic object to this symbol will go through the global
1685 offset table. The dynamic linker will use the .dynsym entry to
1686 determine the address it must put in the global offset table, so
1687 both the dynamic object and the regular object will refer to the
1688 same memory location for the variable. */
1689
1690 htab = elf_s390_hash_table (info);
1691 if (htab == NULL)
1692 return FALSE;
1693
1694 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1695 copy the initial value out of the dynamic object and into the
1696 runtime process image. */
1697 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1698 {
1699 htab->srelbss->size += sizeof (Elf64_External_Rela);
1700 h->needs_copy = 1;
1701 }
1702
1703 s = htab->sdynbss;
1704
1705 return _bfd_elf_adjust_dynamic_copy (h, s);
1706 }
1707
1708 /* Allocate space in .plt, .got and associated reloc sections for
1709 dynamic relocs. */
1710
1711 static bfd_boolean
1712 allocate_dynrelocs (struct elf_link_hash_entry *h,
1713 void * inf)
1714 {
1715 struct bfd_link_info *info;
1716 struct elf_s390_link_hash_table *htab;
1717 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1718 struct elf_dyn_relocs *p;
1719
1720 if (h->root.type == bfd_link_hash_indirect)
1721 return TRUE;
1722
1723 info = (struct bfd_link_info *) inf;
1724 htab = elf_s390_hash_table (info);
1725 if (htab == NULL)
1726 return FALSE;
1727
1728 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1729 here if it is defined and referenced in a non-shared object. */
1730 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1731 return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1732 &eh->dyn_relocs);
1733 else if (htab->elf.dynamic_sections_created
1734 && h->plt.refcount > 0)
1735 {
1736 /* Make sure this symbol is output as a dynamic symbol.
1737 Undefined weak syms won't yet be marked as dynamic. */
1738 if (h->dynindx == -1
1739 && !h->forced_local)
1740 {
1741 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1742 return FALSE;
1743 }
1744
1745 if (info->shared
1746 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1747 {
1748 asection *s = htab->elf.splt;
1749
1750 /* If this is the first .plt entry, make room for the special
1751 first entry. */
1752 if (s->size == 0)
1753 s->size += PLT_FIRST_ENTRY_SIZE;
1754
1755 h->plt.offset = s->size;
1756
1757 /* If this symbol is not defined in a regular file, and we are
1758 not generating a shared library, then set the symbol to this
1759 location in the .plt. This is required to make function
1760 pointers compare as equal between the normal executable and
1761 the shared library. */
1762 if (! info->shared
1763 && !h->def_regular)
1764 {
1765 h->root.u.def.section = s;
1766 h->root.u.def.value = h->plt.offset;
1767 }
1768
1769 /* Make room for this entry. */
1770 s->size += PLT_ENTRY_SIZE;
1771
1772 /* We also need to make an entry in the .got.plt section, which
1773 will be placed in the .got section by the linker script. */
1774 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1775
1776 /* We also need to make an entry in the .rela.plt section. */
1777 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1778 }
1779 else
1780 {
1781 h->plt.offset = (bfd_vma) -1;
1782 h->needs_plt = 0;
1783 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1784 }
1785 }
1786 else
1787 {
1788 h->plt.offset = (bfd_vma) -1;
1789 h->needs_plt = 0;
1790 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1791 }
1792
1793 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1794 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1795 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1796 we can save the dynamic TLS relocation. */
1797 if (h->got.refcount > 0
1798 && !info->shared
1799 && h->dynindx == -1
1800 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1801 {
1802 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1803 /* For the GOTIE access without a literal pool entry the offset has
1804 to be stored somewhere. The immediate value in the instruction
1805 is not bit enough so the value is stored in the got. */
1806 {
1807 h->got.offset = htab->elf.sgot->size;
1808 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1809 }
1810 else
1811 h->got.offset = (bfd_vma) -1;
1812 }
1813 else if (h->got.refcount > 0)
1814 {
1815 asection *s;
1816 bfd_boolean dyn;
1817 int tls_type = elf_s390_hash_entry(h)->tls_type;
1818
1819 /* Make sure this symbol is output as a dynamic symbol.
1820 Undefined weak syms won't yet be marked as dynamic. */
1821 if (h->dynindx == -1
1822 && !h->forced_local)
1823 {
1824 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1825 return FALSE;
1826 }
1827
1828 s = htab->elf.sgot;
1829 h->got.offset = s->size;
1830 s->size += GOT_ENTRY_SIZE;
1831 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1832 if (tls_type == GOT_TLS_GD)
1833 s->size += GOT_ENTRY_SIZE;
1834 dyn = htab->elf.dynamic_sections_created;
1835 /* R_390_TLS_IE64 needs one dynamic relocation,
1836 R_390_TLS_GD64 needs one if local symbol and two if global. */
1837 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1838 || tls_type >= GOT_TLS_IE)
1839 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1840 else if (tls_type == GOT_TLS_GD)
1841 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1842 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1843 || h->root.type != bfd_link_hash_undefweak)
1844 && (info->shared
1845 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1846 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1847 }
1848 else
1849 h->got.offset = (bfd_vma) -1;
1850
1851 if (eh->dyn_relocs == NULL)
1852 return TRUE;
1853
1854 /* In the shared -Bsymbolic case, discard space allocated for
1855 dynamic pc-relative relocs against symbols which turn out to be
1856 defined in regular objects. For the normal shared case, discard
1857 space for pc-relative relocs that have become local due to symbol
1858 visibility changes. */
1859
1860 if (info->shared)
1861 {
1862 if (SYMBOL_CALLS_LOCAL (info, h))
1863 {
1864 struct elf_dyn_relocs **pp;
1865
1866 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1867 {
1868 p->count -= p->pc_count;
1869 p->pc_count = 0;
1870 if (p->count == 0)
1871 *pp = p->next;
1872 else
1873 pp = &p->next;
1874 }
1875 }
1876
1877 /* Also discard relocs on undefined weak syms with non-default
1878 visibility. */
1879 if (eh->dyn_relocs != NULL
1880 && h->root.type == bfd_link_hash_undefweak)
1881 {
1882 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1883 eh->dyn_relocs = NULL;
1884
1885 /* Make sure undefined weak symbols are output as a dynamic
1886 symbol in PIEs. */
1887 else 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 }
1895 else if (ELIMINATE_COPY_RELOCS)
1896 {
1897 /* For the non-shared case, discard space for relocs against
1898 symbols which turn out to need copy relocs or are not
1899 dynamic. */
1900
1901 if (!h->non_got_ref
1902 && ((h->def_dynamic
1903 && !h->def_regular)
1904 || (htab->elf.dynamic_sections_created
1905 && (h->root.type == bfd_link_hash_undefweak
1906 || h->root.type == bfd_link_hash_undefined))))
1907 {
1908 /* Make sure this symbol is output as a dynamic symbol.
1909 Undefined weak syms won't yet be marked as dynamic. */
1910 if (h->dynindx == -1
1911 && !h->forced_local)
1912 {
1913 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1914 return FALSE;
1915 }
1916
1917 /* If that succeeded, we know we'll be keeping all the
1918 relocs. */
1919 if (h->dynindx != -1)
1920 goto keep;
1921 }
1922
1923 eh->dyn_relocs = NULL;
1924
1925 keep: ;
1926 }
1927
1928 /* Finally, allocate space. */
1929 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1930 {
1931 asection *sreloc = elf_section_data (p->sec)->sreloc;
1932 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1933 }
1934
1935 return TRUE;
1936 }
1937
1938 /* Find any dynamic relocs that apply to read-only sections. */
1939
1940 static bfd_boolean
1941 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1942 {
1943 struct elf_s390_link_hash_entry *eh;
1944 struct elf_dyn_relocs *p;
1945
1946 eh = (struct elf_s390_link_hash_entry *) h;
1947 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1948 {
1949 asection *s = p->sec->output_section;
1950
1951 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1952 {
1953 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1954
1955 info->flags |= DF_TEXTREL;
1956
1957 /* Not an error, just cut short the traversal. */
1958 return FALSE;
1959 }
1960 }
1961 return TRUE;
1962 }
1963
1964 /* Set the sizes of the dynamic sections. */
1965
1966 static bfd_boolean
1967 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1968 struct bfd_link_info *info)
1969 {
1970 struct elf_s390_link_hash_table *htab;
1971 bfd *dynobj;
1972 asection *s;
1973 bfd_boolean relocs;
1974 bfd *ibfd;
1975
1976 htab = elf_s390_hash_table (info);
1977 if (htab == NULL)
1978 return FALSE;
1979
1980 dynobj = htab->elf.dynobj;
1981 if (dynobj == NULL)
1982 abort ();
1983
1984 if (htab->elf.dynamic_sections_created)
1985 {
1986 /* Set the contents of the .interp section to the interpreter. */
1987 if (info->executable)
1988 {
1989 s = bfd_get_linker_section (dynobj, ".interp");
1990 if (s == NULL)
1991 abort ();
1992 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1993 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1994 }
1995 }
1996
1997 /* Set up .got offsets for local syms, and space for local dynamic
1998 relocs. */
1999 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2000 {
2001 bfd_signed_vma *local_got;
2002 bfd_signed_vma *end_local_got;
2003 char *local_tls_type;
2004 bfd_size_type locsymcount;
2005 Elf_Internal_Shdr *symtab_hdr;
2006 asection *srela;
2007 struct plt_entry *local_plt;
2008 unsigned int i;
2009
2010 if (! is_s390_elf (ibfd))
2011 continue;
2012
2013 for (s = ibfd->sections; s != NULL; s = s->next)
2014 {
2015 struct elf_dyn_relocs *p;
2016
2017 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2018 {
2019 if (!bfd_is_abs_section (p->sec)
2020 && bfd_is_abs_section (p->sec->output_section))
2021 {
2022 /* Input section has been discarded, either because
2023 it is a copy of a linkonce section or due to
2024 linker script /DISCARD/, so we'll be discarding
2025 the relocs too. */
2026 }
2027 else if (p->count != 0)
2028 {
2029 srela = elf_section_data (p->sec)->sreloc;
2030 srela->size += p->count * sizeof (Elf64_External_Rela);
2031 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2032 info->flags |= DF_TEXTREL;
2033 }
2034 }
2035 }
2036
2037 local_got = elf_local_got_refcounts (ibfd);
2038 if (!local_got)
2039 continue;
2040
2041 symtab_hdr = &elf_symtab_hdr (ibfd);
2042 locsymcount = symtab_hdr->sh_info;
2043 end_local_got = local_got + locsymcount;
2044 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2045 s = htab->elf.sgot;
2046 srela = htab->elf.srelgot;
2047 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2048 {
2049 if (*local_got > 0)
2050 {
2051 *local_got = s->size;
2052 s->size += GOT_ENTRY_SIZE;
2053 if (*local_tls_type == GOT_TLS_GD)
2054 s->size += GOT_ENTRY_SIZE;
2055 if (info->shared)
2056 srela->size += sizeof (Elf64_External_Rela);
2057 }
2058 else
2059 *local_got = (bfd_vma) -1;
2060 }
2061
2062 local_plt = elf_s390_local_plt (ibfd);
2063 for (i = 0; i < symtab_hdr->sh_info; i++)
2064 {
2065 if (local_plt[i].plt.refcount > 0)
2066 {
2067 local_plt[i].plt.offset = htab->elf.iplt->size;
2068 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2069 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2070 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2071 }
2072 else
2073 local_plt[i].plt.offset = (bfd_vma) -1;
2074 }
2075 }
2076
2077 if (htab->tls_ldm_got.refcount > 0)
2078 {
2079 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2080 relocs. */
2081 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2082 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2083 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2084 }
2085 else
2086 htab->tls_ldm_got.offset = -1;
2087
2088 /* Allocate global sym .plt and .got entries, and space for global
2089 sym dynamic relocs. */
2090 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2091
2092 /* We now have determined the sizes of the various dynamic sections.
2093 Allocate memory for them. */
2094 relocs = FALSE;
2095 for (s = dynobj->sections; s != NULL; s = s->next)
2096 {
2097 if ((s->flags & SEC_LINKER_CREATED) == 0)
2098 continue;
2099
2100 if (s == htab->elf.splt
2101 || s == htab->elf.sgot
2102 || s == htab->elf.sgotplt
2103 || s == htab->sdynbss
2104 || s == htab->elf.iplt
2105 || s == htab->elf.igotplt
2106 || s == htab->irelifunc)
2107 {
2108 /* Strip this section if we don't need it; see the
2109 comment below. */
2110 }
2111 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2112 {
2113 if (s->size != 0 && s != htab->elf.srelplt)
2114 relocs = TRUE;
2115
2116 /* We use the reloc_count field as a counter if we need
2117 to copy relocs into the output file. */
2118 s->reloc_count = 0;
2119 }
2120 else
2121 {
2122 /* It's not one of our sections, so don't allocate space. */
2123 continue;
2124 }
2125
2126 if (s->size == 0)
2127 {
2128 /* If we don't need this section, strip it from the
2129 output file. This is to handle .rela.bss and
2130 .rela.plt. We must create it in
2131 create_dynamic_sections, because it must be created
2132 before the linker maps input sections to output
2133 sections. The linker does that before
2134 adjust_dynamic_symbol is called, and it is that
2135 function which decides whether anything needs to go
2136 into these sections. */
2137
2138 s->flags |= SEC_EXCLUDE;
2139 continue;
2140 }
2141
2142 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2143 continue;
2144
2145 /* Allocate memory for the section contents. We use bfd_zalloc
2146 here in case unused entries are not reclaimed before the
2147 section's contents are written out. This should not happen,
2148 but this way if it does, we get a R_390_NONE reloc instead
2149 of garbage. */
2150 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2151 if (s->contents == NULL)
2152 return FALSE;
2153 }
2154
2155 if (htab->elf.dynamic_sections_created)
2156 {
2157 /* Add some entries to the .dynamic section. We fill in the
2158 values later, in elf_s390_finish_dynamic_sections, but we
2159 must add the entries now so that we get the correct size for
2160 the .dynamic section. The DT_DEBUG entry is filled in by the
2161 dynamic linker and used by the debugger. */
2162 #define add_dynamic_entry(TAG, VAL) \
2163 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2164
2165 if (info->executable)
2166 {
2167 if (!add_dynamic_entry (DT_DEBUG, 0))
2168 return FALSE;
2169 }
2170
2171 if (htab->elf.splt->size != 0)
2172 {
2173 if (!add_dynamic_entry (DT_PLTGOT, 0)
2174 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2175 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2176 || !add_dynamic_entry (DT_JMPREL, 0))
2177 return FALSE;
2178 }
2179
2180 if (relocs)
2181 {
2182 if (!add_dynamic_entry (DT_RELA, 0)
2183 || !add_dynamic_entry (DT_RELASZ, 0)
2184 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2185 return FALSE;
2186
2187 /* If any dynamic relocs apply to a read-only section,
2188 then we need a DT_TEXTREL entry. */
2189 if ((info->flags & DF_TEXTREL) == 0)
2190 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2191 info);
2192
2193 if ((info->flags & DF_TEXTREL) != 0)
2194 {
2195 if (!add_dynamic_entry (DT_TEXTREL, 0))
2196 return FALSE;
2197 }
2198 }
2199 }
2200 #undef add_dynamic_entry
2201
2202 return TRUE;
2203 }
2204
2205 /* Return the base VMA address which should be subtracted from real addresses
2206 when resolving @dtpoff relocation.
2207 This is PT_TLS segment p_vaddr. */
2208
2209 static bfd_vma
2210 dtpoff_base (struct bfd_link_info *info)
2211 {
2212 /* If tls_sec is NULL, we should have signalled an error already. */
2213 if (elf_hash_table (info)->tls_sec == NULL)
2214 return 0;
2215 return elf_hash_table (info)->tls_sec->vma;
2216 }
2217
2218 /* Return the relocation value for @tpoff relocation
2219 if STT_TLS virtual address is ADDRESS. */
2220
2221 static bfd_vma
2222 tpoff (struct bfd_link_info *info, bfd_vma address)
2223 {
2224 struct elf_link_hash_table *htab = elf_hash_table (info);
2225
2226 /* If tls_sec is NULL, we should have signalled an error already. */
2227 if (htab->tls_sec == NULL)
2228 return 0;
2229 return htab->tls_size + htab->tls_sec->vma - address;
2230 }
2231
2232 /* Complain if TLS instruction relocation is against an invalid
2233 instruction. */
2234
2235 static void
2236 invalid_tls_insn (bfd *input_bfd,
2237 asection *input_section,
2238 Elf_Internal_Rela *rel)
2239 {
2240 reloc_howto_type *howto;
2241
2242 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2243 (*_bfd_error_handler)
2244 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2245 input_bfd,
2246 input_section,
2247 (long) rel->r_offset,
2248 howto->name);
2249 bfd_set_error (bfd_error_bad_value);
2250 }
2251
2252 /* Relocate a 390 ELF section. */
2253
2254 static bfd_boolean
2255 elf_s390_relocate_section (bfd *output_bfd,
2256 struct bfd_link_info *info,
2257 bfd *input_bfd,
2258 asection *input_section,
2259 bfd_byte *contents,
2260 Elf_Internal_Rela *relocs,
2261 Elf_Internal_Sym *local_syms,
2262 asection **local_sections)
2263 {
2264 struct elf_s390_link_hash_table *htab;
2265 Elf_Internal_Shdr *symtab_hdr;
2266 struct elf_link_hash_entry **sym_hashes;
2267 bfd_vma *local_got_offsets;
2268 Elf_Internal_Rela *rel;
2269 Elf_Internal_Rela *relend;
2270
2271 BFD_ASSERT (is_s390_elf (input_bfd));
2272
2273 htab = elf_s390_hash_table (info);
2274 if (htab == NULL)
2275 return FALSE;
2276
2277 symtab_hdr = &elf_symtab_hdr (input_bfd);
2278 sym_hashes = elf_sym_hashes (input_bfd);
2279 local_got_offsets = elf_local_got_offsets (input_bfd);
2280
2281 rel = relocs;
2282 relend = relocs + input_section->reloc_count;
2283 for (; rel < relend; rel++)
2284 {
2285 unsigned int r_type;
2286 reloc_howto_type *howto;
2287 unsigned long r_symndx;
2288 struct elf_link_hash_entry *h;
2289 Elf_Internal_Sym *sym;
2290 asection *sec;
2291 bfd_vma off;
2292 bfd_vma relocation;
2293 bfd_boolean unresolved_reloc;
2294 bfd_reloc_status_type r;
2295 int tls_type;
2296 asection *base_got = htab->elf.sgot;
2297
2298 r_type = ELF64_R_TYPE (rel->r_info);
2299 if (r_type == (int) R_390_GNU_VTINHERIT
2300 || r_type == (int) R_390_GNU_VTENTRY)
2301 continue;
2302 if (r_type >= (int) R_390_max)
2303 {
2304 bfd_set_error (bfd_error_bad_value);
2305 return FALSE;
2306 }
2307
2308 howto = elf_howto_table + r_type;
2309 r_symndx = ELF64_R_SYM (rel->r_info);
2310
2311 h = NULL;
2312 sym = NULL;
2313 sec = NULL;
2314 unresolved_reloc = FALSE;
2315 if (r_symndx < symtab_hdr->sh_info)
2316 {
2317 sym = local_syms + r_symndx;
2318 sec = local_sections[r_symndx];
2319
2320 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2321 {
2322 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2323 if (local_plt == NULL)
2324 return FALSE;
2325
2326 /* Address of the PLT slot. */
2327 relocation = (htab->elf.iplt->output_section->vma
2328 + htab->elf.iplt->output_offset
2329 + local_plt[r_symndx].plt.offset);
2330
2331 switch (r_type)
2332 {
2333 case R_390_PLTOFF16:
2334 case R_390_PLTOFF32:
2335 case R_390_PLTOFF64:
2336 relocation -= htab->elf.sgot->output_section->vma;
2337 break;
2338 case R_390_GOTPLT12:
2339 case R_390_GOTPLT16:
2340 case R_390_GOTPLT20:
2341 case R_390_GOTPLT32:
2342 case R_390_GOTPLT64:
2343 case R_390_GOTPLTENT:
2344 case R_390_GOT12:
2345 case R_390_GOT16:
2346 case R_390_GOT20:
2347 case R_390_GOT32:
2348 case R_390_GOT64:
2349 case R_390_GOTENT:
2350 {
2351 /* Write the PLT slot address into the GOT slot. */
2352 bfd_put_64 (output_bfd, relocation,
2353 htab->elf.sgot->contents +
2354 local_got_offsets[r_symndx]);
2355 relocation = (local_got_offsets[r_symndx] +
2356 htab->elf.sgot->output_offset);
2357
2358 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2359 relocation += htab->elf.sgot->output_section->vma;
2360 break;
2361 }
2362 default:
2363 break;
2364 }
2365 /* The output section is needed later in
2366 finish_dynamic_section when creating the dynamic
2367 relocation. */
2368 local_plt[r_symndx].sec = sec;
2369 goto do_relocation;
2370 }
2371 else
2372 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2373 }
2374 else
2375 {
2376 bfd_boolean warned ATTRIBUTE_UNUSED;
2377
2378 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2379 r_symndx, symtab_hdr, sym_hashes,
2380 h, sec, relocation,
2381 unresolved_reloc, warned);
2382 }
2383
2384 if (sec != NULL && discarded_section (sec))
2385 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2386 rel, 1, relend, howto, 0, contents);
2387
2388 if (info->relocatable)
2389 continue;
2390
2391 switch (r_type)
2392 {
2393 case R_390_GOTPLT12:
2394 case R_390_GOTPLT16:
2395 case R_390_GOTPLT20:
2396 case R_390_GOTPLT32:
2397 case R_390_GOTPLT64:
2398 case R_390_GOTPLTENT:
2399 /* There are three cases for a GOTPLT relocation. 1) The
2400 relocation is against the jump slot entry of a plt that
2401 will get emitted to the output file. 2) The relocation
2402 is against the jump slot of a plt entry that has been
2403 removed. elf_s390_adjust_gotplt has created a GOT entry
2404 as replacement. 3) The relocation is against a local symbol.
2405 Cases 2) and 3) are the same as the GOT relocation code
2406 so we just have to test for case 1 and fall through for
2407 the other two. */
2408 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2409 {
2410 bfd_vma plt_index;
2411
2412 if (s390_is_ifunc_symbol_p (h))
2413 {
2414 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2415 relocation = (plt_index * GOT_ENTRY_SIZE +
2416 htab->elf.igotplt->output_offset);
2417 if (r_type == R_390_GOTPLTENT)
2418 relocation += htab->elf.igotplt->output_section->vma;
2419 }
2420 else
2421 {
2422 /* Calc. index no.
2423 Current offset - size first entry / entry size. */
2424 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2425 PLT_ENTRY_SIZE;
2426
2427 /* Offset in GOT is PLT index plus GOT headers(3)
2428 times 4, addr & GOT addr. */
2429 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2430 if (r_type == R_390_GOTPLTENT)
2431 relocation += htab->elf.sgot->output_section->vma;
2432 }
2433 unresolved_reloc = FALSE;
2434 break;
2435 }
2436 /* Fall through. */
2437
2438 case R_390_GOT12:
2439 case R_390_GOT16:
2440 case R_390_GOT20:
2441 case R_390_GOT32:
2442 case R_390_GOT64:
2443 case R_390_GOTENT:
2444 /* Relocation is to the entry for this symbol in the global
2445 offset table. */
2446 if (base_got == NULL)
2447 abort ();
2448
2449 if (h != NULL)
2450 {
2451 bfd_boolean dyn;
2452
2453 off = h->got.offset;
2454 dyn = htab->elf.dynamic_sections_created;
2455
2456 if (s390_is_ifunc_symbol_p (h))
2457 {
2458 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2459 if (off == (bfd_vma)-1)
2460 {
2461 /* No explicit GOT usage so redirect to the
2462 got.iplt slot. */
2463 base_got = htab->elf.igotplt;
2464 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2465 }
2466 else
2467 {
2468 /* Explicit GOT slots must contain the address
2469 of the PLT slot. This will be handled in
2470 finish_dynamic_symbol. */
2471 }
2472 }
2473 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2474 || (info->shared
2475 && SYMBOL_REFERENCES_LOCAL (info, h))
2476 || (ELF_ST_VISIBILITY (h->other)
2477 && h->root.type == bfd_link_hash_undefweak))
2478 {
2479 /* This is actually a static link, or it is a
2480 -Bsymbolic link and the symbol is defined
2481 locally, or the symbol was forced to be local
2482 because of a version file. We must initialize
2483 this entry in the global offset table. Since the
2484 offset must always be a multiple of 2, we use the
2485 least significant bit to record whether we have
2486 initialized it already.
2487
2488 When doing a dynamic link, we create a .rel.got
2489 relocation entry to initialize the value. This
2490 is done in the finish_dynamic_symbol routine. */
2491 if ((off & 1) != 0)
2492 off &= ~1;
2493 else
2494 {
2495 bfd_put_64 (output_bfd, relocation,
2496 base_got->contents + off);
2497 h->got.offset |= 1;
2498 }
2499 }
2500 else
2501 unresolved_reloc = FALSE;
2502 }
2503 else
2504 {
2505 if (local_got_offsets == NULL)
2506 abort ();
2507
2508 off = local_got_offsets[r_symndx];
2509
2510 /* The offset must always be a multiple of 8. We use
2511 the least significant bit to record whether we have
2512 already generated the necessary reloc. */
2513 if ((off & 1) != 0)
2514 off &= ~1;
2515 else
2516 {
2517 bfd_put_64 (output_bfd, relocation,
2518 htab->elf.sgot->contents + off);
2519
2520 if (info->shared)
2521 {
2522 asection *s;
2523 Elf_Internal_Rela outrel;
2524 bfd_byte *loc;
2525
2526 s = htab->elf.srelgot;
2527 if (s == NULL)
2528 abort ();
2529
2530 outrel.r_offset = (htab->elf.sgot->output_section->vma
2531 + htab->elf.sgot->output_offset
2532 + off);
2533 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2534 outrel.r_addend = relocation;
2535 loc = s->contents;
2536 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2537 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2538 }
2539
2540 local_got_offsets[r_symndx] |= 1;
2541 }
2542 }
2543
2544 if (off >= (bfd_vma) -2)
2545 abort ();
2546
2547 relocation = base_got->output_offset + off;
2548
2549 /* For @GOTENT the relocation is against the offset between
2550 the instruction and the symbols entry in the GOT and not
2551 between the start of the GOT and the symbols entry. We
2552 add the vma of the GOT to get the correct value. */
2553 if ( r_type == R_390_GOTENT
2554 || r_type == R_390_GOTPLTENT)
2555 relocation += base_got->output_section->vma;
2556
2557 break;
2558
2559 case R_390_GOTOFF16:
2560 case R_390_GOTOFF32:
2561 case R_390_GOTOFF64:
2562 /* Relocation is relative to the start of the global offset
2563 table. */
2564
2565 /* Note that sgot->output_offset is not involved in this
2566 calculation. We always want the start of .got. If we
2567 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2568 permitted by the ABI, we might have to change this
2569 calculation. */
2570 relocation -= htab->elf.sgot->output_section->vma;
2571 break;
2572
2573 case R_390_GOTPC:
2574 case R_390_GOTPCDBL:
2575 /* Use global offset table as symbol value. */
2576 relocation = htab->elf.sgot->output_section->vma;
2577 unresolved_reloc = FALSE;
2578 break;
2579
2580 case R_390_PLT12DBL:
2581 case R_390_PLT16DBL:
2582 case R_390_PLT24DBL:
2583 case R_390_PLT32:
2584 case R_390_PLT32DBL:
2585 case R_390_PLT64:
2586 /* Relocation is to the entry for this symbol in the
2587 procedure linkage table. */
2588
2589 /* Resolve a PLT32 reloc against a local symbol directly,
2590 without using the procedure linkage table. */
2591 if (h == NULL)
2592 break;
2593
2594 if (h->plt.offset == (bfd_vma) -1
2595 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2596 {
2597 /* We didn't make a PLT entry for this symbol. This
2598 happens when statically linking PIC code, or when
2599 using -Bsymbolic. */
2600 break;
2601 }
2602 if (s390_is_ifunc_symbol_p (h))
2603 relocation = (htab->elf.iplt->output_section->vma
2604 + htab->elf.iplt->output_offset
2605 + h->plt.offset);
2606 else
2607 relocation = (htab->elf.splt->output_section->vma
2608 + htab->elf.splt->output_offset
2609 + h->plt.offset);
2610 unresolved_reloc = FALSE;
2611 break;
2612
2613 case R_390_PLTOFF16:
2614 case R_390_PLTOFF32:
2615 case R_390_PLTOFF64:
2616 /* Relocation is to the entry for this symbol in the
2617 procedure linkage table relative to the start of the GOT. */
2618
2619 /* For local symbols or if we didn't make a PLT entry for
2620 this symbol resolve the symbol directly. */
2621 if (h == NULL
2622 || h->plt.offset == (bfd_vma) -1
2623 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2624 {
2625 relocation -= htab->elf.sgot->output_section->vma;
2626 break;
2627 }
2628
2629 if (s390_is_ifunc_symbol_p (h))
2630 relocation = (htab->elf.iplt->output_section->vma
2631 + htab->elf.iplt->output_offset
2632 + h->plt.offset
2633 - htab->elf.sgot->output_section->vma);
2634 else
2635 relocation = (htab->elf.splt->output_section->vma
2636 + htab->elf.splt->output_offset
2637 + h->plt.offset
2638 - htab->elf.sgot->output_section->vma);
2639 unresolved_reloc = FALSE;
2640 break;
2641
2642 case R_390_8:
2643 case R_390_16:
2644 case R_390_32:
2645 case R_390_64:
2646 case R_390_PC16:
2647 case R_390_PC12DBL:
2648 case R_390_PC16DBL:
2649 case R_390_PC24DBL:
2650 case R_390_PC32:
2651 case R_390_PC32DBL:
2652 case R_390_PC64:
2653
2654 if (h != NULL
2655 && s390_is_ifunc_symbol_p (h)
2656 && h->def_regular)
2657 {
2658 if (!info->shared || !h->non_got_ref)
2659 {
2660 /* For a non-shared object STT_GNU_IFUNC symbol must
2661 go through PLT. */
2662 relocation = (htab->elf.iplt->output_section->vma
2663 + htab->elf.iplt->output_offset
2664 + h ->plt.offset);
2665 goto do_relocation;
2666 }
2667 else
2668 {
2669 /* For shared objects a runtime relocation is needed. */
2670
2671 Elf_Internal_Rela outrel;
2672 asection *sreloc;
2673
2674 /* Need a dynamic relocation to get the real function
2675 address. */
2676 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2677 info,
2678 input_section,
2679 rel->r_offset);
2680 if (outrel.r_offset == (bfd_vma) -1
2681 || outrel.r_offset == (bfd_vma) -2)
2682 abort ();
2683
2684 outrel.r_offset += (input_section->output_section->vma
2685 + input_section->output_offset);
2686
2687 if (h->dynindx == -1
2688 || h->forced_local
2689 || info->executable)
2690 {
2691 /* This symbol is resolved locally. */
2692 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2693 outrel.r_addend = (h->root.u.def.value
2694 + h->root.u.def.section->output_section->vma
2695 + h->root.u.def.section->output_offset);
2696 }
2697 else
2698 {
2699 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2700 outrel.r_addend = 0;
2701 }
2702
2703 sreloc = htab->elf.irelifunc;
2704 elf_append_rela (output_bfd, sreloc, &outrel);
2705
2706 /* If this reloc is against an external symbol, we
2707 do not want to fiddle with the addend. Otherwise,
2708 we need to include the symbol value so that it
2709 becomes an addend for the dynamic reloc. For an
2710 internal symbol, we have updated addend. */
2711 continue;
2712 }
2713 }
2714
2715 if ((input_section->flags & SEC_ALLOC) == 0)
2716 break;
2717
2718 if ((info->shared
2719 && (h == NULL
2720 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2721 || h->root.type != bfd_link_hash_undefweak)
2722 && ((r_type != R_390_PC16
2723 && r_type != R_390_PC12DBL
2724 && r_type != R_390_PC16DBL
2725 && r_type != R_390_PC24DBL
2726 && r_type != R_390_PC32
2727 && r_type != R_390_PC32DBL
2728 && r_type != R_390_PC64)
2729 || !SYMBOL_CALLS_LOCAL (info, h)))
2730 || (ELIMINATE_COPY_RELOCS
2731 && !info->shared
2732 && h != NULL
2733 && h->dynindx != -1
2734 && !h->non_got_ref
2735 && ((h->def_dynamic
2736 && !h->def_regular)
2737 || h->root.type == bfd_link_hash_undefweak
2738 || h->root.type == bfd_link_hash_undefined)))
2739 {
2740 Elf_Internal_Rela outrel;
2741 bfd_boolean skip, relocate;
2742 asection *sreloc;
2743 bfd_byte *loc;
2744
2745 /* When generating a shared object, these relocations
2746 are copied into the output file to be resolved at run
2747 time. */
2748 skip = FALSE;
2749 relocate = FALSE;
2750
2751 outrel.r_offset =
2752 _bfd_elf_section_offset (output_bfd, info, input_section,
2753 rel->r_offset);
2754 if (outrel.r_offset == (bfd_vma) -1)
2755 skip = TRUE;
2756 else if (outrel.r_offset == (bfd_vma) -2)
2757 skip = TRUE, relocate = TRUE;
2758
2759 outrel.r_offset += (input_section->output_section->vma
2760 + input_section->output_offset);
2761
2762 if (skip)
2763 memset (&outrel, 0, sizeof outrel);
2764 else if (h != NULL
2765 && h->dynindx != -1
2766 && (r_type == R_390_PC16
2767 || r_type == R_390_PC12DBL
2768 || r_type == R_390_PC16DBL
2769 || r_type == R_390_PC24DBL
2770 || r_type == R_390_PC32
2771 || r_type == R_390_PC32DBL
2772 || r_type == R_390_PC64
2773 || !info->shared
2774 || !SYMBOLIC_BIND (info, h)
2775 || !h->def_regular))
2776 {
2777 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2778 outrel.r_addend = rel->r_addend;
2779 }
2780 else
2781 {
2782 /* This symbol is local, or marked to become local. */
2783 outrel.r_addend = relocation + rel->r_addend;
2784 if (r_type == R_390_64)
2785 {
2786 relocate = TRUE;
2787 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2788 }
2789 else
2790 {
2791 long sindx;
2792
2793 if (bfd_is_abs_section (sec))
2794 sindx = 0;
2795 else if (sec == NULL || sec->owner == NULL)
2796 {
2797 bfd_set_error(bfd_error_bad_value);
2798 return FALSE;
2799 }
2800 else
2801 {
2802 asection *osec;
2803
2804 osec = sec->output_section;
2805 sindx = elf_section_data (osec)->dynindx;
2806
2807 if (sindx == 0)
2808 {
2809 osec = htab->elf.text_index_section;
2810 sindx = elf_section_data (osec)->dynindx;
2811 }
2812 BFD_ASSERT (sindx != 0);
2813
2814 /* We are turning this relocation into one
2815 against a section symbol, so subtract out
2816 the output section's address but not the
2817 offset of the input section in the output
2818 section. */
2819 outrel.r_addend -= osec->vma;
2820 }
2821 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2822 }
2823 }
2824
2825 sreloc = elf_section_data (input_section)->sreloc;
2826 if (sreloc == NULL)
2827 abort ();
2828
2829 loc = sreloc->contents;
2830 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2831 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2832
2833 /* If this reloc is against an external symbol, we do
2834 not want to fiddle with the addend. Otherwise, we
2835 need to include the symbol value so that it becomes
2836 an addend for the dynamic reloc. */
2837 if (! relocate)
2838 continue;
2839 }
2840
2841 break;
2842
2843 /* Relocations for tls literal pool entries. */
2844 case R_390_TLS_IE64:
2845 if (info->shared)
2846 {
2847 Elf_Internal_Rela outrel;
2848 asection *sreloc;
2849 bfd_byte *loc;
2850
2851 outrel.r_offset = rel->r_offset
2852 + input_section->output_section->vma
2853 + input_section->output_offset;
2854 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2855 sreloc = elf_section_data (input_section)->sreloc;
2856 if (sreloc == NULL)
2857 abort ();
2858 loc = sreloc->contents;
2859 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2860 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2861 }
2862 /* Fall through. */
2863
2864 case R_390_TLS_GD64:
2865 case R_390_TLS_GOTIE64:
2866 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2867 tls_type = GOT_UNKNOWN;
2868 if (h == NULL && local_got_offsets)
2869 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2870 else if (h != NULL)
2871 {
2872 tls_type = elf_s390_hash_entry(h)->tls_type;
2873 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2874 r_type = R_390_TLS_LE64;
2875 }
2876 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2877 r_type = R_390_TLS_IE64;
2878
2879 if (r_type == R_390_TLS_LE64)
2880 {
2881 /* This relocation gets optimized away by the local exec
2882 access optimization. */
2883 BFD_ASSERT (! unresolved_reloc);
2884 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2885 contents + rel->r_offset);
2886 continue;
2887 }
2888
2889 if (htab->elf.sgot == NULL)
2890 abort ();
2891
2892 if (h != NULL)
2893 off = h->got.offset;
2894 else
2895 {
2896 if (local_got_offsets == NULL)
2897 abort ();
2898
2899 off = local_got_offsets[r_symndx];
2900 }
2901
2902 emit_tls_relocs:
2903
2904 if ((off & 1) != 0)
2905 off &= ~1;
2906 else
2907 {
2908 Elf_Internal_Rela outrel;
2909 bfd_byte *loc;
2910 int dr_type, indx;
2911
2912 if (htab->elf.srelgot == NULL)
2913 abort ();
2914
2915 outrel.r_offset = (htab->elf.sgot->output_section->vma
2916 + htab->elf.sgot->output_offset + off);
2917
2918 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2919 if (r_type == R_390_TLS_GD64)
2920 dr_type = R_390_TLS_DTPMOD;
2921 else
2922 dr_type = R_390_TLS_TPOFF;
2923 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2924 outrel.r_addend = relocation - dtpoff_base (info);
2925 else
2926 outrel.r_addend = 0;
2927 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2928 loc = htab->elf.srelgot->contents;
2929 loc += htab->elf.srelgot->reloc_count++
2930 * sizeof (Elf64_External_Rela);
2931 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2932
2933 if (r_type == R_390_TLS_GD64)
2934 {
2935 if (indx == 0)
2936 {
2937 BFD_ASSERT (! unresolved_reloc);
2938 bfd_put_64 (output_bfd,
2939 relocation - dtpoff_base (info),
2940 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2941 }
2942 else
2943 {
2944 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2945 outrel.r_offset += GOT_ENTRY_SIZE;
2946 outrel.r_addend = 0;
2947 htab->elf.srelgot->reloc_count++;
2948 loc += sizeof (Elf64_External_Rela);
2949 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2950 }
2951 }
2952
2953 if (h != NULL)
2954 h->got.offset |= 1;
2955 else
2956 local_got_offsets[r_symndx] |= 1;
2957 }
2958
2959 if (off >= (bfd_vma) -2)
2960 abort ();
2961 if (r_type == ELF64_R_TYPE (rel->r_info))
2962 {
2963 relocation = htab->elf.sgot->output_offset + off;
2964 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2965 relocation += htab->elf.sgot->output_section->vma;
2966 unresolved_reloc = FALSE;
2967 }
2968 else
2969 {
2970 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2971 contents + rel->r_offset);
2972 continue;
2973 }
2974 break;
2975
2976 case R_390_TLS_GOTIE12:
2977 case R_390_TLS_GOTIE20:
2978 case R_390_TLS_IEENT:
2979 if (h == NULL)
2980 {
2981 if (local_got_offsets == NULL)
2982 abort();
2983 off = local_got_offsets[r_symndx];
2984 if (info->shared)
2985 goto emit_tls_relocs;
2986 }
2987 else
2988 {
2989 off = h->got.offset;
2990 tls_type = elf_s390_hash_entry(h)->tls_type;
2991 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2992 goto emit_tls_relocs;
2993 }
2994
2995 if (htab->elf.sgot == NULL)
2996 abort ();
2997
2998 BFD_ASSERT (! unresolved_reloc);
2999 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3000 htab->elf.sgot->contents + off);
3001 relocation = htab->elf.sgot->output_offset + off;
3002 if (r_type == R_390_TLS_IEENT)
3003 relocation += htab->elf.sgot->output_section->vma;
3004 unresolved_reloc = FALSE;
3005 break;
3006
3007 case R_390_TLS_LDM64:
3008 if (! info->shared)
3009 /* The literal pool entry this relocation refers to gets ignored
3010 by the optimized code of the local exec model. Do nothing
3011 and the value will turn out zero. */
3012 continue;
3013
3014 if (htab->elf.sgot == NULL)
3015 abort ();
3016
3017 off = htab->tls_ldm_got.offset;
3018 if (off & 1)
3019 off &= ~1;
3020 else
3021 {
3022 Elf_Internal_Rela outrel;
3023 bfd_byte *loc;
3024
3025 if (htab->elf.srelgot == NULL)
3026 abort ();
3027
3028 outrel.r_offset = (htab->elf.sgot->output_section->vma
3029 + htab->elf.sgot->output_offset + off);
3030
3031 bfd_put_64 (output_bfd, 0,
3032 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3033 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3034 outrel.r_addend = 0;
3035 loc = htab->elf.srelgot->contents;
3036 loc += htab->elf.srelgot->reloc_count++
3037 * sizeof (Elf64_External_Rela);
3038 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3039 htab->tls_ldm_got.offset |= 1;
3040 }
3041 relocation = htab->elf.sgot->output_offset + off;
3042 unresolved_reloc = FALSE;
3043 break;
3044
3045 case R_390_TLS_LE64:
3046 if (info->shared)
3047 {
3048 /* Linking a shared library with non-fpic code requires
3049 a R_390_TLS_TPOFF relocation. */
3050 Elf_Internal_Rela outrel;
3051 asection *sreloc;
3052 bfd_byte *loc;
3053 int indx;
3054
3055 outrel.r_offset = rel->r_offset
3056 + input_section->output_section->vma
3057 + input_section->output_offset;
3058 if (h != NULL && h->dynindx != -1)
3059 indx = h->dynindx;
3060 else
3061 indx = 0;
3062 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3063 if (indx == 0)
3064 outrel.r_addend = relocation - dtpoff_base (info);
3065 else
3066 outrel.r_addend = 0;
3067 sreloc = elf_section_data (input_section)->sreloc;
3068 if (sreloc == NULL)
3069 abort ();
3070 loc = sreloc->contents;
3071 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3072 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3073 }
3074 else
3075 {
3076 BFD_ASSERT (! unresolved_reloc);
3077 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3078 contents + rel->r_offset);
3079 }
3080 continue;
3081
3082 case R_390_TLS_LDO64:
3083 if (info->shared || (input_section->flags & SEC_DEBUGGING))
3084 relocation -= dtpoff_base (info);
3085 else
3086 /* When converting LDO to LE, we must negate. */
3087 relocation = -tpoff (info, relocation);
3088 break;
3089
3090 /* Relocations for tls instructions. */
3091 case R_390_TLS_LOAD:
3092 case R_390_TLS_GDCALL:
3093 case R_390_TLS_LDCALL:
3094 tls_type = GOT_UNKNOWN;
3095 if (h == NULL && local_got_offsets)
3096 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3097 else if (h != NULL)
3098 tls_type = elf_s390_hash_entry(h)->tls_type;
3099
3100 if (tls_type == GOT_TLS_GD)
3101 continue;
3102
3103 if (r_type == R_390_TLS_LOAD)
3104 {
3105 if (!info->shared && (h == NULL || h->dynindx == -1))
3106 {
3107 /* IE->LE transition. Four valid cases:
3108 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3109 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3110 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3111 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3112 unsigned int insn0, insn1, ry;
3113
3114 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3115 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3116 if (insn1 != 0x0004)
3117 invalid_tls_insn (input_bfd, input_section, rel);
3118 ry = 0;
3119 if ((insn0 & 0xff00f000) == 0xe3000000)
3120 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3121 ry = (insn0 & 0x000f0000);
3122 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3123 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3124 ry = (insn0 & 0x0000f000) << 4;
3125 else if ((insn0 & 0xff00f000) == 0xe300c000)
3126 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3127 ry = (insn0 & 0x000f0000);
3128 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3129 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3130 ry = (insn0 & 0x0000f000) << 4;
3131 else
3132 invalid_tls_insn (input_bfd, input_section, rel);
3133 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3134 insn1 = 0x000d;
3135 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3136 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3137 }
3138 }
3139 else if (r_type == R_390_TLS_GDCALL)
3140 {
3141 unsigned int insn0, insn1;
3142
3143 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3144 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3145 if ((insn0 & 0xffff0000) != 0xc0e50000)
3146 invalid_tls_insn (input_bfd, input_section, rel);
3147 if (!info->shared && (h == NULL || h->dynindx == -1))
3148 {
3149 /* GD->LE transition.
3150 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3151 insn0 = 0xc0040000;
3152 insn1 = 0x0000;
3153 }
3154 else
3155 {
3156 /* GD->IE transition.
3157 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3158 insn0 = 0xe322c000;
3159 insn1 = 0x0004;
3160 }
3161 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3162 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3163 }
3164 else if (r_type == R_390_TLS_LDCALL)
3165 {
3166 if (!info->shared)
3167 {
3168 unsigned int insn0, insn1;
3169
3170 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3171 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3172 if ((insn0 & 0xffff0000) != 0xc0e50000)
3173 invalid_tls_insn (input_bfd, input_section, rel);
3174 /* LD->LE transition.
3175 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3176 insn0 = 0xc0040000;
3177 insn1 = 0x0000;
3178 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3179 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3180 }
3181 }
3182 continue;
3183
3184 default:
3185 break;
3186 }
3187
3188 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3189 because such sections are not SEC_ALLOC and thus ld.so will
3190 not process them. */
3191 if (unresolved_reloc
3192 && !((input_section->flags & SEC_DEBUGGING) != 0
3193 && h->def_dynamic)
3194 && _bfd_elf_section_offset (output_bfd, info, input_section,
3195 rel->r_offset) != (bfd_vma) -1)
3196 (*_bfd_error_handler)
3197 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3198 input_bfd,
3199 input_section,
3200 (long) rel->r_offset,
3201 howto->name,
3202 h->root.root.string);
3203
3204 do_relocation:
3205
3206 /* When applying a 24 bit reloc we need to start one byte
3207 earlier. Otherwise the 32 bit get/put bfd operations might
3208 access a byte after the actual section. */
3209 if (r_type == R_390_PC24DBL
3210 || r_type == R_390_PLT24DBL)
3211 rel->r_offset--;
3212
3213 if (r_type == R_390_20
3214 || r_type == R_390_GOT20
3215 || r_type == R_390_GOTPLT20
3216 || r_type == R_390_TLS_GOTIE20)
3217 {
3218 relocation += rel->r_addend;
3219 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3220 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3221 contents, rel->r_offset,
3222 relocation, 0);
3223 }
3224 else
3225 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3226 contents, rel->r_offset,
3227 relocation, rel->r_addend);
3228
3229 if (r != bfd_reloc_ok)
3230 {
3231 const char *name;
3232
3233 if (h != NULL)
3234 name = h->root.root.string;
3235 else
3236 {
3237 name = bfd_elf_string_from_elf_section (input_bfd,
3238 symtab_hdr->sh_link,
3239 sym->st_name);
3240 if (name == NULL)
3241 return FALSE;
3242 if (*name == '\0')
3243 name = bfd_section_name (input_bfd, sec);
3244 }
3245
3246 if (r == bfd_reloc_overflow)
3247 {
3248
3249 if (! ((*info->callbacks->reloc_overflow)
3250 (info, (h ? &h->root : NULL), name, howto->name,
3251 (bfd_vma) 0, input_bfd, input_section,
3252 rel->r_offset)))
3253 return FALSE;
3254 }
3255 else
3256 {
3257 (*_bfd_error_handler)
3258 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3259 input_bfd, input_section,
3260 (long) rel->r_offset, name, (int) r);
3261 return FALSE;
3262 }
3263 }
3264 }
3265
3266 return TRUE;
3267 }
3268
3269 /* Generate the PLT slots together with the dynamic relocations needed
3270 for IFUNC symbols. */
3271
3272 static void
3273 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3274 struct bfd_link_info *info,
3275 struct elf_link_hash_entry *h,
3276 struct elf_s390_link_hash_table *htab,
3277 bfd_vma plt_offset,
3278 bfd_vma resolver_address)
3279 {
3280 bfd_vma plt_index;
3281 bfd_vma got_offset;
3282 Elf_Internal_Rela rela;
3283 bfd_byte *loc;
3284 asection *plt, *gotplt, *relplt;
3285
3286 if (htab->elf.iplt == NULL
3287 || htab->elf.igotplt == NULL
3288 || htab->elf.irelplt == NULL)
3289 abort ();
3290
3291 /* Index of the PLT slot within iplt section. */
3292 plt_index = plt_offset / PLT_ENTRY_SIZE;
3293 plt = htab->elf.iplt;
3294 /* Offset into the igot.plt section. */
3295 got_offset = plt_index * GOT_ENTRY_SIZE;
3296 gotplt = htab->elf.igotplt;
3297 relplt = htab->elf.irelplt;
3298
3299 /* Fill in the blueprint of a PLT. */
3300 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3301 PLT_ENTRY_SIZE);
3302
3303 /* Fixup the relative address to the GOT entry */
3304 bfd_put_32 (output_bfd,
3305 (gotplt->output_section->vma +
3306 gotplt->output_offset + got_offset
3307 - (plt->output_section->vma +
3308 plt->output_offset +
3309 plt_offset))/2,
3310 plt->contents + plt_offset + 2);
3311 /* Fixup the relative branch to PLT 0 */
3312 bfd_put_32 (output_bfd, - (plt->output_offset +
3313 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3314 plt->contents + plt_offset + 24);
3315 /* Fixup offset into .rela.plt section. */
3316 bfd_put_32 (output_bfd, relplt->output_offset +
3317 plt_index * sizeof (Elf64_External_Rela),
3318 plt->contents + plt_offset + 28);
3319
3320 /* Fill in the entry in the global offset table.
3321 Points to instruction after GOT offset. */
3322 bfd_put_64 (output_bfd,
3323 (plt->output_section->vma
3324 + plt->output_offset
3325 + plt_offset
3326 + 14),
3327 gotplt->contents + got_offset);
3328
3329 /* Fill in the entry in the .rela.plt section. */
3330 rela.r_offset = (gotplt->output_section->vma
3331 + gotplt->output_offset
3332 + got_offset);
3333
3334 if (!h
3335 || h->dynindx == -1
3336 || ((info->executable
3337 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3338 && h->def_regular))
3339 {
3340 /* The symbol can be locally resolved. */
3341 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3342 rela.r_addend = resolver_address;
3343 }
3344 else
3345 {
3346 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3347 rela.r_addend = 0;
3348 }
3349
3350 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3351 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3352 }
3353
3354
3355 /* Finish up dynamic symbol handling. We set the contents of various
3356 dynamic sections here. */
3357
3358 static bfd_boolean
3359 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3360 struct bfd_link_info *info,
3361 struct elf_link_hash_entry *h,
3362 Elf_Internal_Sym *sym)
3363 {
3364 struct elf_s390_link_hash_table *htab;
3365 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3366
3367 htab = elf_s390_hash_table (info);
3368 if (htab == NULL)
3369 return FALSE;
3370
3371 if (h->plt.offset != (bfd_vma) -1)
3372 {
3373 bfd_vma plt_index;
3374 bfd_vma got_offset;
3375 Elf_Internal_Rela rela;
3376 bfd_byte *loc;
3377
3378 /* This symbol has an entry in the procedure linkage table. Set
3379 it up. */
3380 if (s390_is_ifunc_symbol_p (h))
3381 {
3382 /* If we can resolve the IFUNC symbol locally we generate an
3383 IRELATIVE reloc. */
3384 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3385 eh->ifunc_resolver_address +
3386 eh->ifunc_resolver_section->output_offset +
3387 eh->ifunc_resolver_section->output_section->vma);
3388 ;
3389 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3390 symbols is below. */
3391 }
3392 else
3393 {
3394 if (h->dynindx == -1
3395 || htab->elf.splt == NULL
3396 || htab->elf.sgotplt == NULL
3397 || htab->elf.srelplt == NULL)
3398 abort ();
3399
3400 /* Calc. index no.
3401 Current offset - size first entry / entry size. */
3402 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3403
3404 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3405 addr & GOT addr. */
3406 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3407
3408 /* Fill in the blueprint of a PLT. */
3409 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3410 PLT_ENTRY_SIZE);
3411
3412 /* Fixup the relative address to the GOT entry */
3413 bfd_put_32 (output_bfd,
3414 (htab->elf.sgotplt->output_section->vma +
3415 htab->elf.sgotplt->output_offset + got_offset
3416 - (htab->elf.splt->output_section->vma +
3417 htab->elf.splt->output_offset +
3418 h->plt.offset))/2,
3419 htab->elf.splt->contents + h->plt.offset + 2);
3420 /* Fixup the relative branch to PLT 0 */
3421 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3422 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3423 htab->elf.splt->contents + h->plt.offset + 24);
3424 /* Fixup offset into .rela.plt section. */
3425 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3426 htab->elf.splt->contents + h->plt.offset + 28);
3427
3428 /* Fill in the entry in the global offset table.
3429 Points to instruction after GOT offset. */
3430 bfd_put_64 (output_bfd,
3431 (htab->elf.splt->output_section->vma
3432 + htab->elf.splt->output_offset
3433 + h->plt.offset
3434 + 14),
3435 htab->elf.sgotplt->contents + got_offset);
3436
3437 /* Fill in the entry in the .rela.plt section. */
3438 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3439 + htab->elf.sgotplt->output_offset
3440 + got_offset);
3441 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3442 rela.r_addend = 0;
3443 loc = htab->elf.srelplt->contents + plt_index *
3444 sizeof (Elf64_External_Rela);
3445 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3446
3447 if (!h->def_regular)
3448 {
3449 /* Mark the symbol as undefined, rather than as defined in
3450 the .plt section. Leave the value alone. This is a clue
3451 for the dynamic linker, to make function pointer
3452 comparisons work between an application and shared
3453 library. */
3454 sym->st_shndx = SHN_UNDEF;
3455 }
3456 }
3457 }
3458
3459 if (h->got.offset != (bfd_vma) -1
3460 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3461 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3462 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3463 {
3464 Elf_Internal_Rela rela;
3465 bfd_byte *loc;
3466
3467 /* This symbol has an entry in the global offset table. Set it
3468 up. */
3469 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3470 abort ();
3471
3472 rela.r_offset = (htab->elf.sgot->output_section->vma
3473 + htab->elf.sgot->output_offset
3474 + (h->got.offset &~ (bfd_vma) 1));
3475
3476 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3477 {
3478 if (info->shared)
3479 {
3480 /* An explicit GOT slot usage needs GLOB_DAT. If the
3481 symbol references local the implicit got.iplt slot
3482 will be used and the IRELATIVE reloc has been created
3483 above. */
3484 goto do_glob_dat;
3485 }
3486 else
3487 {
3488 /* For non-shared objects explicit GOT slots must be
3489 filled with the PLT slot address for pointer
3490 equality reasons. */
3491 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3492 + htab->elf.iplt->output_offset
3493 + h->plt.offset),
3494 htab->elf.sgot->contents + h->got.offset);
3495 return TRUE;
3496 }
3497 }
3498 else if (info->shared
3499 && SYMBOL_REFERENCES_LOCAL (info, h))
3500 {
3501 /* If this is a static link, or it is a -Bsymbolic link and
3502 the symbol is defined locally or was forced to be local
3503 because of a version file, we just want to emit a
3504 RELATIVE reloc. The entry in the global offset table
3505 will already have been initialized in the
3506 relocate_section function. */
3507 if (!h->def_regular)
3508 return FALSE;
3509 BFD_ASSERT((h->got.offset & 1) != 0);
3510 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3511 rela.r_addend = (h->root.u.def.value
3512 + h->root.u.def.section->output_section->vma
3513 + h->root.u.def.section->output_offset);
3514 }
3515 else
3516 {
3517 BFD_ASSERT((h->got.offset & 1) == 0);
3518 do_glob_dat:
3519 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3520 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3521 rela.r_addend = 0;
3522 }
3523
3524 loc = htab->elf.srelgot->contents;
3525 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3526 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3527 }
3528
3529 if (h->needs_copy)
3530 {
3531 Elf_Internal_Rela rela;
3532 bfd_byte *loc;
3533
3534 /* This symbols needs a copy reloc. Set it up. */
3535
3536 if (h->dynindx == -1
3537 || (h->root.type != bfd_link_hash_defined
3538 && h->root.type != bfd_link_hash_defweak)
3539 || htab->srelbss == NULL)
3540 abort ();
3541
3542 rela.r_offset = (h->root.u.def.value
3543 + h->root.u.def.section->output_section->vma
3544 + h->root.u.def.section->output_offset);
3545 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3546 rela.r_addend = 0;
3547 loc = htab->srelbss->contents;
3548 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3549 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3550 }
3551
3552 /* Mark some specially defined symbols as absolute. */
3553 if (h == htab->elf.hdynamic
3554 || h == htab->elf.hgot
3555 || h == htab->elf.hplt)
3556 sym->st_shndx = SHN_ABS;
3557
3558 return TRUE;
3559 }
3560
3561 /* Used to decide how to sort relocs in an optimal manner for the
3562 dynamic linker, before writing them out. */
3563
3564 static enum elf_reloc_type_class
3565 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3566 const asection *rel_sec ATTRIBUTE_UNUSED,
3567 const Elf_Internal_Rela *rela)
3568 {
3569 switch ((int) ELF64_R_TYPE (rela->r_info))
3570 {
3571 case R_390_RELATIVE:
3572 return reloc_class_relative;
3573 case R_390_JMP_SLOT:
3574 return reloc_class_plt;
3575 case R_390_COPY:
3576 return reloc_class_copy;
3577 default:
3578 return reloc_class_normal;
3579 }
3580 }
3581
3582 /* Finish up the dynamic sections. */
3583
3584 static bfd_boolean
3585 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3586 struct bfd_link_info *info)
3587 {
3588 struct elf_s390_link_hash_table *htab;
3589 bfd *dynobj;
3590 asection *sdyn;
3591 bfd *ibfd;
3592 unsigned int i;
3593
3594 htab = elf_s390_hash_table (info);
3595 if (htab == NULL)
3596 return FALSE;
3597
3598 dynobj = htab->elf.dynobj;
3599 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3600
3601 if (htab->elf.dynamic_sections_created)
3602 {
3603 Elf64_External_Dyn *dyncon, *dynconend;
3604
3605 if (sdyn == NULL || htab->elf.sgot == NULL)
3606 abort ();
3607
3608 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3609 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3610 for (; dyncon < dynconend; dyncon++)
3611 {
3612 Elf_Internal_Dyn dyn;
3613 asection *s;
3614
3615 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3616
3617 switch (dyn.d_tag)
3618 {
3619 default:
3620 continue;
3621
3622 case DT_PLTGOT:
3623 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3624 break;
3625
3626 case DT_JMPREL:
3627 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3628 break;
3629
3630 case DT_PLTRELSZ:
3631 s = htab->elf.srelplt->output_section;
3632 dyn.d_un.d_val = s->size;
3633 break;
3634
3635 case DT_RELASZ:
3636 /* The procedure linkage table relocs (DT_JMPREL) should
3637 not be included in the overall relocs (DT_RELA).
3638 Therefore, we override the DT_RELASZ entry here to
3639 make it not include the JMPREL relocs. Since the
3640 linker script arranges for .rela.plt to follow all
3641 other relocation sections, we don't have to worry
3642 about changing the DT_RELA entry. */
3643 s = htab->elf.srelplt->output_section;
3644 dyn.d_un.d_val -= s->size;
3645 break;
3646 }
3647
3648 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3649 }
3650
3651 /* Fill in the special first entry in the procedure linkage table. */
3652 if (htab->elf.splt && htab->elf.splt->size > 0)
3653 {
3654 /* fill in blueprint for plt 0 entry */
3655 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3656 PLT_FIRST_ENTRY_SIZE);
3657 /* Fixup relative address to start of GOT */
3658 bfd_put_32 (output_bfd,
3659 (htab->elf.sgotplt->output_section->vma +
3660 htab->elf.sgotplt->output_offset
3661 - htab->elf.splt->output_section->vma - 6)/2,
3662 htab->elf.splt->contents + 8);
3663 }
3664 elf_section_data (htab->elf.splt->output_section)
3665 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3666 }
3667
3668 if (htab->elf.sgotplt)
3669 {
3670 /* Fill in the first three entries in the global offset table. */
3671 if (htab->elf.sgotplt->size > 0)
3672 {
3673 bfd_put_64 (output_bfd,
3674 (sdyn == NULL ? (bfd_vma) 0
3675 : sdyn->output_section->vma + sdyn->output_offset),
3676 htab->elf.sgotplt->contents);
3677 /* One entry for shared object struct ptr. */
3678 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3679 /* One entry for _dl_runtime_resolve. */
3680 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
3681 }
3682
3683 elf_section_data (htab->elf.sgot->output_section)
3684 ->this_hdr.sh_entsize = 8;
3685 }
3686
3687 /* Finish dynamic symbol for local IFUNC symbols. */
3688 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3689 {
3690 struct plt_entry *local_plt;
3691 Elf_Internal_Sym *isym;
3692 Elf_Internal_Shdr *symtab_hdr;
3693
3694 symtab_hdr = &elf_symtab_hdr (ibfd);
3695
3696 local_plt = elf_s390_local_plt (ibfd);
3697 if (local_plt != NULL)
3698 for (i = 0; i < symtab_hdr->sh_info; i++)
3699 {
3700 if (local_plt[i].plt.offset != (bfd_vma) -1)
3701 {
3702 asection *sec = local_plt[i].sec;
3703 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3704 if (isym == NULL)
3705 return FALSE;
3706
3707 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3708 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3709 local_plt[i].plt.offset,
3710 isym->st_value
3711 + sec->output_section->vma
3712 + sec->output_offset);
3713
3714 }
3715 }
3716 }
3717
3718 return TRUE;
3719 }
3720
3721 /* Return address for Ith PLT stub in section PLT, for relocation REL
3722 or (bfd_vma) -1 if it should not be included. */
3723
3724 static bfd_vma
3725 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3726 const arelent *rel ATTRIBUTE_UNUSED)
3727 {
3728 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3729 }
3730
3731 /* Why was the hash table entry size definition changed from
3732 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3733 this is the only reason for the s390_elf64_size_info structure. */
3734
3735 const struct elf_size_info s390_elf64_size_info =
3736 {
3737 sizeof (Elf64_External_Ehdr),
3738 sizeof (Elf64_External_Phdr),
3739 sizeof (Elf64_External_Shdr),
3740 sizeof (Elf64_External_Rel),
3741 sizeof (Elf64_External_Rela),
3742 sizeof (Elf64_External_Sym),
3743 sizeof (Elf64_External_Dyn),
3744 sizeof (Elf_External_Note),
3745 8, /* hash-table entry size. */
3746 1, /* internal relocations per external relocations. */
3747 64, /* arch_size. */
3748 3, /* log_file_align. */
3749 ELFCLASS64, EV_CURRENT,
3750 bfd_elf64_write_out_phdrs,
3751 bfd_elf64_write_shdrs_and_ehdr,
3752 bfd_elf64_checksum_contents,
3753 bfd_elf64_write_relocs,
3754 bfd_elf64_swap_symbol_in,
3755 bfd_elf64_swap_symbol_out,
3756 bfd_elf64_slurp_reloc_table,
3757 bfd_elf64_slurp_symbol_table,
3758 bfd_elf64_swap_dyn_in,
3759 bfd_elf64_swap_dyn_out,
3760 bfd_elf64_swap_reloc_in,
3761 bfd_elf64_swap_reloc_out,
3762 bfd_elf64_swap_reloca_in,
3763 bfd_elf64_swap_reloca_out
3764 };
3765
3766 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3767 #define TARGET_BIG_NAME "elf64-s390"
3768 #define ELF_ARCH bfd_arch_s390
3769 #define ELF_TARGET_ID S390_ELF_DATA
3770 #define ELF_MACHINE_CODE EM_S390
3771 #define ELF_MACHINE_ALT1 EM_S390_OLD
3772 #define ELF_MAXPAGESIZE 0x1000
3773
3774 #define elf_backend_size_info s390_elf64_size_info
3775
3776 #define elf_backend_can_gc_sections 1
3777 #define elf_backend_can_refcount 1
3778 #define elf_backend_want_got_plt 1
3779 #define elf_backend_plt_readonly 1
3780 #define elf_backend_want_plt_sym 0
3781 #define elf_backend_got_header_size 24
3782 #define elf_backend_rela_normal 1
3783
3784 #define elf_info_to_howto elf_s390_info_to_howto
3785
3786 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3787 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3788 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3789 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3790
3791 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3792 #define elf_backend_check_relocs elf_s390_check_relocs
3793 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3794 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3795 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3796 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3797 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3798 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3799 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3800 #define elf_backend_relocate_section elf_s390_relocate_section
3801 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3802 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3803 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3804 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3805
3806 #define bfd_elf64_mkobject elf_s390_mkobject
3807 #define elf_backend_object_p elf_s390_object_p
3808
3809 /* Enable ELF64 archive functions. */
3810 #define bfd_elf64_archive_functions
3811 extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
3812 extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
3813
3814 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3815 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3816 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3817 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3818 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3819 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3820 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3821 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3822 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3823
3824 #include "elf64-target.h"
GDB Binutils - Deliverables
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