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* elflink.h (elf_gc_mark): Pass in the section whose relocs we are
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
CommitLineData
a85d7ed0 1/* IBM S/390-specific support for 32-bit ELF
e92d460e 2 Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
a85d7ed0
NC		 3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22#include "bfd.h"
23#include "sysdep.h"
24#include "bfdlink.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
27
28static reloc_howto_type *elf_s390_reloc_type_lookup
29 PARAMS ((bfd *, bfd_reloc_code_real_type));
30static void elf_s390_info_to_howto
31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
0451c93c
MS		 32static boolean elf_s390_is_local_label_name
33 PARAMS ((bfd *, const char *));
34static struct bfd_hash_entry *link_hash_newfunc
a85d7ed0
NC		 35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36static struct bfd_link_hash_table *elf_s390_link_hash_table_create
37 PARAMS ((bfd *));
0451c93c
MS		 38static boolean create_got_section
39 PARAMS((bfd *, struct bfd_link_info *));
40static boolean elf_s390_create_dynamic_sections
41 PARAMS((bfd *, struct bfd_link_info *));
42static void elf_s390_copy_indirect_symbol
43 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
a85d7ed0
NC		 44static boolean elf_s390_check_relocs
45 PARAMS ((bfd *, struct bfd_link_info *, asection *,
46 const Elf_Internal_Rela *));
5a65713f 47static asection *elf_s390_gc_mark_hook
1e2f5b6e 48 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
0451c93c 49 struct elf_link_hash_entry *, Elf_Internal_Sym *));
5a65713f
AJ		 50static boolean elf_s390_gc_sweep_hook
51 PARAMS ((bfd *, struct bfd_link_info *, asection *,
52 const Elf_Internal_Rela *));
a85d7ed0
NC		 53static boolean elf_s390_adjust_dynamic_symbol
54 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
0451c93c
MS		 55static boolean allocate_dynrelocs
56 PARAMS ((struct elf_link_hash_entry *, PTR));
57static boolean readonly_dynrelocs
58 PARAMS ((struct elf_link_hash_entry *, PTR));
a85d7ed0
NC		 59static boolean elf_s390_size_dynamic_sections
60 PARAMS ((bfd *, struct bfd_link_info *));
61static boolean elf_s390_relocate_section
62 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
63 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
64static boolean elf_s390_finish_dynamic_symbol
65 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
66 Elf_Internal_Sym *));
0451c93c
MS		 67static enum elf_reloc_type_class elf_s390_reloc_type_class
68 PARAMS ((const Elf_Internal_Rela *));
a85d7ed0
NC		 69static boolean elf_s390_finish_dynamic_sections
70 PARAMS ((bfd *, struct bfd_link_info *));
5a65713f 71static boolean elf_s390_object_p PARAMS ((bfd *));
248866a8 72static boolean elf_s390_grok_prstatus PARAMS ((bfd *, Elf_Internal_Note *));
a85d7ed0
NC		 73
74#define USE_RELA 1 /* We want RELA relocations, not REL. */
75
76#include "elf/s390.h"
77
78/* The relocation "howto" table. */
79
80static reloc_howto_type elf_howto_table[] =
81{
82 HOWTO (R_390_NONE, /* type */
83 0, /* rightshift */
84 0, /* size (0 = byte, 1 = short, 2 = long) */
85 0, /* bitsize */
86 false, /* pc_relative */
87 0, /* bitpos */
88 complain_overflow_dont, /* complain_on_overflow */
89 bfd_elf_generic_reloc, /* special_function */
90 "R_390_NONE", /* name */
91 false, /* partial_inplace */
92 0, /* src_mask */
93 0, /* dst_mask */
94 false), /* pcrel_offset */
95
96 HOWTO(R_390_8, 0, 0, 8, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_8", false, 0,0x000000ff, false),
97 HOWTO(R_390_12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_12", false, 0,0x00000fff, false),
98 HOWTO(R_390_16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_16", false, 0,0x0000ffff, false),
99 HOWTO(R_390_32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_32", false, 0,0xffffffff, false),
100 HOWTO(R_390_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC32", false, 0,0xffffffff, true),
101 HOWTO(R_390_GOT12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_GOT12", false, 0,0x00000fff, false),
102 HOWTO(R_390_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT32", false, 0,0xffffffff, false),
103 HOWTO(R_390_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32", false, 0,0xffffffff, true),
104 HOWTO(R_390_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_COPY", false, 0,0xffffffff, false),
105 HOWTO(R_390_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GLOB_DAT",false, 0,0xffffffff, false),
106 HOWTO(R_390_JMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_JMP_SLOT",false, 0,0xffffffff, false),
107 HOWTO(R_390_RELATIVE, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_RELATIVE",false, 0,0xffffffff, false),
108 HOWTO(R_390_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF", false, 0,0xffffffff, false),
109 HOWTO(R_390_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,0xffffffff, true),
110 HOWTO(R_390_GOT16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT16", false, 0,0x0000ffff, false),
111 HOWTO(R_390_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16", false, 0,0x0000ffff, true),
112 HOWTO(R_390_PC16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16DBL", false, 0,0x0000ffff, true),
113 HOWTO(R_390_PLT16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true),
befc3abb
MS		 114 HOWTO(R_390_PC32DBL, 1, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC32DBL", false, 0,0xffffffff, true),
115 HOWTO(R_390_PLT32DBL, 1, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32DBL", false, 0,0xffffffff, true),
116 HOWTO(R_390_GOTPCDBL, 1, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPCDBL", false, 0,0xffffffff, true),
117 HOWTO(R_390_GOTENT, 1, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTENT", false, 0,0xffffffff, true),
a85d7ed0
NC		 118};
119
120/* GNU extension to record C++ vtable hierarchy. */
121static reloc_howto_type elf32_s390_vtinherit_howto =
122 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false);
123static reloc_howto_type elf32_s390_vtentry_howto =
dc810e39 124 HOWTO (R_390_GNU_VTENTRY, 0,2,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", false,0,0, false);
a85d7ed0
NC		 125
126static reloc_howto_type *
127elf_s390_reloc_type_lookup (abfd, code)
128 bfd *abfd ATTRIBUTE_UNUSED;
129 bfd_reloc_code_real_type code;
130{
ec338859 131 switch (code)
0451c93c
MS		 132 {
133 case BFD_RELOC_NONE:
134 return &elf_howto_table[(int) R_390_NONE];
135 case BFD_RELOC_8:
136 return &elf_howto_table[(int) R_390_8];
137 case BFD_RELOC_390_12:
138 return &elf_howto_table[(int) R_390_12];
139 case BFD_RELOC_16:
140 return &elf_howto_table[(int) R_390_16];
141 case BFD_RELOC_32:
142 return &elf_howto_table[(int) R_390_32];
143 case BFD_RELOC_CTOR:
144 return &elf_howto_table[(int) R_390_32];
145 case BFD_RELOC_32_PCREL:
146 return &elf_howto_table[(int) R_390_PC32];
147 case BFD_RELOC_390_GOT12:
148 return &elf_howto_table[(int) R_390_GOT12];
149 case BFD_RELOC_32_GOT_PCREL:
150 return &elf_howto_table[(int) R_390_GOT32];
151 case BFD_RELOC_390_PLT32:
152 return &elf_howto_table[(int) R_390_PLT32];
153 case BFD_RELOC_390_COPY:
154 return &elf_howto_table[(int) R_390_COPY];
155 case BFD_RELOC_390_GLOB_DAT:
156 return &elf_howto_table[(int) R_390_GLOB_DAT];
157 case BFD_RELOC_390_JMP_SLOT:
158 return &elf_howto_table[(int) R_390_JMP_SLOT];
159 case BFD_RELOC_390_RELATIVE:
160 return &elf_howto_table[(int) R_390_RELATIVE];
161 case BFD_RELOC_32_GOTOFF:
162 return &elf_howto_table[(int) R_390_GOTOFF];
163 case BFD_RELOC_390_GOTPC:
164 return &elf_howto_table[(int) R_390_GOTPC];
165 case BFD_RELOC_390_GOT16:
166 return &elf_howto_table[(int) R_390_GOT16];
167 case BFD_RELOC_16_PCREL:
168 return &elf_howto_table[(int) R_390_PC16];
169 case BFD_RELOC_390_PC16DBL:
170 return &elf_howto_table[(int) R_390_PC16DBL];
171 case BFD_RELOC_390_PLT16DBL:
172 return &elf_howto_table[(int) R_390_PLT16DBL];
befc3abb
MS		 173 case BFD_RELOC_390_PC32DBL:
174 return &elf_howto_table[(int) R_390_PC32DBL];
175 case BFD_RELOC_390_PLT32DBL:
176 return &elf_howto_table[(int) R_390_PLT32DBL];
177 case BFD_RELOC_390_GOTPCDBL:
178 return &elf_howto_table[(int) R_390_GOTPCDBL];
179 case BFD_RELOC_390_GOTENT:
180 return &elf_howto_table[(int) R_390_GOTENT];
0451c93c
MS		 181 case BFD_RELOC_VTABLE_INHERIT:
182 return &elf32_s390_vtinherit_howto;
183 case BFD_RELOC_VTABLE_ENTRY:
184 return &elf32_s390_vtentry_howto;
185 default:
186 break;
187 }
a85d7ed0
NC		 188 return 0;
189}
190
191/* We need to use ELF32_R_TYPE so we have our own copy of this function,
192 and elf32-s390.c has its own copy. */
193
194static void
195elf_s390_info_to_howto (abfd, cache_ptr, dst)
196 bfd *abfd ATTRIBUTE_UNUSED;
197 arelent *cache_ptr;
198 Elf_Internal_Rela *dst;
199{
200 switch (ELF32_R_TYPE(dst->r_info))
201 {
202 case R_390_GNU_VTINHERIT:
203 cache_ptr->howto = &elf32_s390_vtinherit_howto;
204 break;
205
206 case R_390_GNU_VTENTRY:
207 cache_ptr->howto = &elf32_s390_vtentry_howto;
208 break;
209
210 default:
211 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
212 cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
dc810e39 213 }
a85d7ed0
NC		 214}
215
216static boolean
217elf_s390_is_local_label_name (abfd, name)
218 bfd *abfd;
219 const char *name;
220{
221 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
222 return true;
223
224 return _bfd_elf_is_local_label_name (abfd, name);
225}
226
227/* Functions for the 390 ELF linker. */
228
229/* The name of the dynamic interpreter. This is put in the .interp
230 section. */
231
232#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
233
a85d7ed0
NC		 234/* The size in bytes of the first entry in the procedure linkage table. */
235#define PLT_FIRST_ENTRY_SIZE 32
236/* The size in bytes of an entry in the procedure linkage table. */
dc810e39 237#define PLT_ENTRY_SIZE 32
a85d7ed0
NC		 238
239#define GOT_ENTRY_SIZE 4
240
241/* The first three entries in a procedure linkage table are reserved,
242 and the initial contents are unimportant (we zero them out).
243 Subsequent entries look like this. See the SVR4 ABI 386
244 supplement to see how this works. */
245
246/* For the s390, simple addr offset can only be 0 - 4096.
247 To use the full 2 GB address space, several instructions
248 are needed to load an address in a register and execute
249 a branch( or just saving the address)
250
dc810e39 251 Furthermore, only r 0 and 1 are free to use!!! */
a85d7ed0
NC		 252
253/* The first 3 words in the GOT are then reserved.
254 Word 0 is the address of the dynamic table.
255 Word 1 is a pointer to a structure describing the object
256 Word 2 is used to point to the loader entry address.
257
258 The code for position independand PLT entries looks like this:
259
260 r12 holds addr of the current GOT at entry to the PLT
261
262 The GOT holds the address in the PLT to be executed.
263 The loader then gets:
264 24(15) = Pointer to the structure describing the object.
dc810e39 265 28(15) = Offset in symbol table
a85d7ed0
NC		 266
267 The loader must then find the module where the function is
268 and insert the address in the GOT.
269
270 Note: 390 can only address +- 64 K relative.
271 We check if offset > 65536, then make a relative branch -64xxx
272 back to a previous defined branch
273
274PLT1: BASR 1,0 # 2 bytes
275 L 1,22(1) # 4 bytes Load offset in GOT in r 1
276 L 1,(1,12) # 4 bytes Load address from GOT in r1
277 BCR 15,1 # 2 bytes Jump to address
278RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
279 L 1,14(1) # 4 bytes Load offset in symol table in r1
280 BRC 15,-x # 4 bytes Jump to start of PLT
281 .word 0 # 2 bytes filler
282 .long ? # 4 bytes offset in GOT
283 .long ? # 4 bytes offset into symbol table
284
285 This was the general case. There are two additional, optimizes PLT
286 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
287 First the one for GOT offsets < 4096:
288
289PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
290 BCR 15,1 # 2 bytes Jump to address
291 .word 0,0,0 # 6 bytes filler
292RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
293 L 1,14(1) # 4 bytes Load offset in symbol table in r1
294 BRC 15,-x # 4 bytes Jump to start of PLT
295 .word 0,0,0 # 6 bytes filler
296 .long ? # 4 bytes offset into symbol table
297
298 Second the one for GOT offsets < 32768:
299
300PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
301 L 1,(1,12) # 4 bytes Load address from GOT to r1
302 BCR 15,1 # 2 bytes Jump to address
303 .word 0 # 2 bytes filler
304RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
305 L 1,14(1) # 4 bytes Load offset in symbol table in r1
306 BRC 15,-x # 4 bytes Jump to start of PLT
307 .word 0,0,0 # 6 bytes filler
308 .long ? # 4 bytes offset into symbol table
309
310Total = 32 bytes per PLT entry
311
312 The code for static build PLT entries looks like this:
313
314PLT1: BASR 1,0 # 2 bytes
315 L 1,22(1) # 4 bytes Load address of GOT entry
316 L 1,0(0,1) # 4 bytes Load address from GOT in r1
317 BCR 15,1 # 2 bytes Jump to address
318RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
319 L 1,14(1) # 4 bytes Load offset in symbol table in r1
320 BRC 15,-x # 4 bytes Jump to start of PLT
321 .word 0 # 2 bytes filler
322 .long ? # 4 bytes address of GOT entry
323 .long ? # 4 bytes offset into symbol table */
324
325#define PLT_PIC_ENTRY_WORD0 0x0d105810
326#define PLT_PIC_ENTRY_WORD1 0x10165811
327#define PLT_PIC_ENTRY_WORD2 0xc00007f1
328#define PLT_PIC_ENTRY_WORD3 0x0d105810
329#define PLT_PIC_ENTRY_WORD4 0x100ea7f4
330
331#define PLT_PIC12_ENTRY_WORD0 0x5810c000
332#define PLT_PIC12_ENTRY_WORD1 0x07f10000
333#define PLT_PIC12_ENTRY_WORD2 0x00000000
334#define PLT_PIC12_ENTRY_WORD3 0x0d105810
335#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
336
337#define PLT_PIC16_ENTRY_WORD0 0xa7180000
338#define PLT_PIC16_ENTRY_WORD1 0x5811c000
339#define PLT_PIC16_ENTRY_WORD2 0x07f10000
340#define PLT_PIC16_ENTRY_WORD3 0x0d105810
341#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
342
343#define PLT_ENTRY_WORD0 0x0d105810
344#define PLT_ENTRY_WORD1 0x10165810
345#define PLT_ENTRY_WORD2 0x100007f1
346#define PLT_ENTRY_WORD3 0x0d105810
347#define PLT_ENTRY_WORD4 0x100ea7f4
348
349/* The first PLT entry pushes the offset into the symbol table
350 from R1 onto the stack at 8(15) and the loader object info
351 at 12(15), loads the loader address in R1 and jumps to it. */
352
353/* The first entry in the PLT for PIC code:
354
355PLT0:
356 ST 1,28(15) # R1 has offset into symbol table
357 L 1,4(12) # Get loader ino(object struct address)
dc810e39 358 ST 1,24(15) # Store address
a85d7ed0
NC		 359 L 1,8(12) # Entry address of loader in R1
360 BR 1 # Jump to loader
361
362 The first entry in the PLT for static code:
363
364PLT0:
365 ST 1,28(15) # R1 has offset into symbol table
366 BASR 1,0
367 L 1,18(0,1) # Get address of GOT
368 MVC 24(4,15),4(1) # Move loader ino to stack
369 L 1,8(1) # Get address of loader
370 BR 1 # Jump to loader
371 .word 0 # filler
372 .long got # address of GOT */
373
374#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
375#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
376#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
377#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
378#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
379
380#define PLT_FIRST_ENTRY_WORD0 0x5010f01c
381#define PLT_FIRST_ENTRY_WORD1 0x0d105810
382#define PLT_FIRST_ENTRY_WORD2 0x1012D203
383#define PLT_FIRST_ENTRY_WORD3 0xf0181004
384#define PLT_FIRST_ENTRY_WORD4 0x58101008
385#define PLT_FIRST_ENTRY_WORD5 0x07f10000
386
387/* The s390 linker needs to keep track of the number of relocs that it
0451c93c
MS		 388 decides to copy as dynamic relocs in check_relocs for each symbol.
389 This is so that it can later discard them if they are found to be
390 unnecessary. We store the information in a field extending the
391 regular ELF linker hash table. */
a85d7ed0 392
0451c93c 393struct elf_s390_dyn_relocs
a85d7ed0 394{
0451c93c
MS		 395 struct elf_s390_dyn_relocs *next;
396
397 /* The input section of the reloc. */
398 asection *sec;
399
400 /* Total number of relocs copied for the input section. */
a85d7ed0 401 bfd_size_type count;
0451c93c
MS		 402
403 /* Number of pc-relative relocs copied for the input section. */
404 bfd_size_type pc_count;
a85d7ed0
NC		 405};
406
407/* s390 ELF linker hash entry. */
408
409struct elf_s390_link_hash_entry
410{
0451c93c 411 struct elf_link_hash_entry elf;
a85d7ed0 412
0451c93c
MS		 413 /* Track dynamic relocs copied for this symbol. */
414 struct elf_s390_dyn_relocs *dyn_relocs;
a85d7ed0
NC		 415};
416
417/* s390 ELF linker hash table. */
418
419struct elf_s390_link_hash_table
420{
0451c93c 421 struct elf_link_hash_table elf;
a85d7ed0 422
0451c93c
MS		 423 /* Short-cuts to get to dynamic linker sections. */
424 asection *sgot;
425 asection *sgotplt;
426 asection *srelgot;
427 asection *splt;
428 asection *srelplt;
429 asection *sdynbss;
430 asection *srelbss;
ec338859
AM		 431
432 /* Small local sym to section mapping cache. */
433 struct sym_sec_cache sym_sec;
0451c93c 434};
a85d7ed0
NC		 435
436/* Get the s390 ELF linker hash table from a link_info structure. */
437
438#define elf_s390_hash_table(p) \
439 ((struct elf_s390_link_hash_table *) ((p)->hash))
440
441/* Create an entry in an s390 ELF linker hash table. */
442
443static struct bfd_hash_entry *
0451c93c 444link_hash_newfunc (entry, table, string)
a85d7ed0
NC		 445 struct bfd_hash_entry *entry;
446 struct bfd_hash_table *table;
447 const char *string;
448{
a85d7ed0
NC		 449 /* Allocate the structure if it has not already been allocated by a
450 subclass. */
0451c93c
MS		 451 if (entry == NULL)
452 {
453 entry = bfd_hash_allocate (table,
454 sizeof (struct elf_s390_link_hash_entry));
455 if (entry == NULL)
456 return entry;
457 }
ec338859 458
a85d7ed0 459 /* Call the allocation method of the superclass. */
0451c93c
MS		 460 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
461 if (entry != NULL)
a85d7ed0 462 {
0451c93c 463 struct elf_s390_link_hash_entry *eh;
ec338859 464
0451c93c
MS		 465 eh = (struct elf_s390_link_hash_entry *) entry;
466 eh->dyn_relocs = NULL;
a85d7ed0
NC		 467 }
468
0451c93c 469 return entry;
a85d7ed0
NC		 470}
471
472/* Create an s390 ELF linker hash table. */
473
474static struct bfd_link_hash_table *
475elf_s390_link_hash_table_create (abfd)
476 bfd *abfd;
477{
478 struct elf_s390_link_hash_table *ret;
dc810e39 479 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
a85d7ed0 480
e2d34d7d 481 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
0451c93c 482 if (ret == NULL)
a85d7ed0
NC		 483 return NULL;
484
0451c93c 485 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
a85d7ed0 486 {
e2d34d7d 487 free (ret);
a85d7ed0
NC		 488 return NULL;
489 }
490
0451c93c
MS		 491 ret->sgot = NULL;
492 ret->sgotplt = NULL;
493 ret->srelgot = NULL;
494 ret->splt = NULL;
495 ret->srelplt = NULL;
496 ret->sdynbss = NULL;
497 ret->srelbss = NULL;
ec338859 498 ret->sym_sec.abfd = NULL;
0451c93c
MS		 499
500 return &ret->elf.root;
501}
502
503/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
504 shortcuts to them in our hash table. */
505
506static boolean
507create_got_section (dynobj, info)
508 bfd *dynobj;
509 struct bfd_link_info *info;
510{
511 struct elf_s390_link_hash_table *htab;
512
513 if (! _bfd_elf_create_got_section (dynobj, info))
514 return false;
515
516 htab = elf_s390_hash_table (info);
517 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
518 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
519 if (!htab->sgot || !htab->sgotplt)
520 abort ();
521
522 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
523 if (htab->srelgot == NULL
524 || ! bfd_set_section_flags (dynobj, htab->srelgot,
525 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
526 | SEC_IN_MEMORY | SEC_LINKER_CREATED
527 | SEC_READONLY))
528 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
529 return false;
530 return true;
531}
532
533/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
534 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
535 hash table. */
536
537static boolean
538elf_s390_create_dynamic_sections (dynobj, info)
539 bfd *dynobj;
540 struct bfd_link_info *info;
541{
542 struct elf_s390_link_hash_table *htab;
543
544 htab = elf_s390_hash_table (info);
545 if (!htab->sgot && !create_got_section (dynobj, info))
546 return false;
547
548 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
549 return false;
550
551 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
552 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
553 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
554 if (!info->shared)
555 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
556
557 if (!htab->splt || !htab->srelplt || !htab->sdynbss
558 || (!info->shared && !htab->srelbss))
559 abort ();
560
561 return true;
a85d7ed0
NC		 562}
563
0451c93c
MS		 564/* Copy the extra info we tack onto an elf_link_hash_entry. */
565
566static void
567elf_s390_copy_indirect_symbol (dir, ind)
568 struct elf_link_hash_entry *dir, *ind;
569{
570 struct elf_s390_link_hash_entry *edir, *eind;
571
572 edir = (struct elf_s390_link_hash_entry *) dir;
573 eind = (struct elf_s390_link_hash_entry *) ind;
574
575 if (eind->dyn_relocs != NULL)
576 {
577 if (edir->dyn_relocs != NULL)
578 {
579 struct elf_s390_dyn_relocs **pp;
580 struct elf_s390_dyn_relocs *p;
581
582 if (ind->root.type == bfd_link_hash_indirect)
583 abort ();
584
585 /* Add reloc counts against the weak sym to the strong sym
586 list. Merge any entries against the same section. */
587 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
588 {
589 struct elf_s390_dyn_relocs *q;
590
591 for (q = edir->dyn_relocs; q != NULL; q = q->next)
592 if (q->sec == p->sec)
593 {
594 q->pc_count += p->pc_count;
595 q->count += p->count;
596 *pp = p->next;
597 break;
598 }
599 if (q == NULL)
600 pp = &p->next;
601 }
602 *pp = edir->dyn_relocs;
603 }
604
605 edir->dyn_relocs = eind->dyn_relocs;
606 eind->dyn_relocs = NULL;
607 }
608
609 _bfd_elf_link_hash_copy_indirect (dir, ind);
610}
a85d7ed0
NC		 611
612/* Look through the relocs for a section during the first phase, and
613 allocate space in the global offset table or procedure linkage
614 table. */
615
616static boolean
617elf_s390_check_relocs (abfd, info, sec, relocs)
618 bfd *abfd;
619 struct bfd_link_info *info;
620 asection *sec;
621 const Elf_Internal_Rela *relocs;
622{
0451c93c 623 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 624 Elf_Internal_Shdr *symtab_hdr;
625 struct elf_link_hash_entry **sym_hashes;
a85d7ed0
NC		 626 const Elf_Internal_Rela *rel;
627 const Elf_Internal_Rela *rel_end;
a85d7ed0
NC		 628 asection *sreloc;
629
630 if (info->relocateable)
631 return true;
632
0451c93c 633 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 634 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
635 sym_hashes = elf_sym_hashes (abfd);
a85d7ed0 636
a85d7ed0
NC		 637 sreloc = NULL;
638
639 rel_end = relocs + sec->reloc_count;
640 for (rel = relocs; rel < rel_end; rel++)
641 {
642 unsigned long r_symndx;
643 struct elf_link_hash_entry *h;
644
645 r_symndx = ELF32_R_SYM (rel->r_info);
646
0451c93c
MS		 647 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
648 {
649 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
650 bfd_archive_filename (abfd),
651 r_symndx);
652 return false;
653 }
654
a85d7ed0
NC		 655 if (r_symndx < symtab_hdr->sh_info)
656 h = NULL;
657 else
dc810e39 658 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
a85d7ed0 659
a85d7ed0
NC		 660 switch (ELF32_R_TYPE (rel->r_info))
661 {
662 case R_390_GOT12:
663 case R_390_GOT16:
664 case R_390_GOT32:
befc3abb 665 case R_390_GOTENT:
a85d7ed0 666 /* This symbol requires a global offset table entry. */
a85d7ed0
NC		 667 if (h != NULL)
668 {
51b64d56 669 h->got.refcount += 1;
a85d7ed0
NC		 670 }
671 else
672 {
0451c93c
MS		 673 bfd_signed_vma *local_got_refcounts;
674
a85d7ed0 675 /* This is a global offset table entry for a local symbol. */
0451c93c 676 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0
NC		 677 if (local_got_refcounts == NULL)
678 {
dc810e39 679 bfd_size_type size;
a85d7ed0 680
dc810e39
AM		 681 size = symtab_hdr->sh_info;
682 size *= sizeof (bfd_signed_vma);
0451c93c
MS		 683 local_got_refcounts = ((bfd_signed_vma *)
684 bfd_zalloc (abfd, size));
a85d7ed0
NC		 685 if (local_got_refcounts == NULL)
686 return false;
687 elf_local_got_refcounts (abfd) = local_got_refcounts;
a85d7ed0 688 }
51b64d56 689 local_got_refcounts[r_symndx] += 1;
a85d7ed0 690 }
0451c93c
MS		 691 /* Fall through */
692
693 case R_390_GOTOFF:
694 case R_390_GOTPC:
befc3abb 695 case R_390_GOTPCDBL:
0451c93c
MS		 696 if (htab->sgot == NULL)
697 {
698 if (htab->elf.dynobj == NULL)
699 htab->elf.dynobj = abfd;
700 if (!create_got_section (htab->elf.dynobj, info))
701 return false;
702 }
a85d7ed0
NC		 703 break;
704
705 case R_390_PLT16DBL:
befc3abb 706 case R_390_PLT32DBL:
a85d7ed0
NC		 707 case R_390_PLT32:
708 /* This symbol requires a procedure linkage table entry. We
709 actually build the entry in adjust_dynamic_symbol,
710 because this might be a case of linking PIC code which is
711 never referenced by a dynamic object, in which case we
712 don't need to generate a procedure linkage table entry
713 after all. */
714
715 /* If this is a local symbol, we resolve it directly without
716 creating a procedure linkage table entry. */
717 if (h == NULL)
718 continue;
719
51b64d56
AM		 720 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
721 h->plt.refcount += 1;
a85d7ed0
NC		 722 break;
723
724 case R_390_8:
725 case R_390_16:
726 case R_390_32:
727 case R_390_PC16:
728 case R_390_PC16DBL:
befc3abb 729 case R_390_PC32DBL:
a85d7ed0 730 case R_390_PC32:
0451c93c
MS		 731 if (h != NULL && !info->shared)
732 {
733 /* If this reloc is in a read-only section, we might
734 need a copy reloc. We can't check reliably at this
735 stage whether the section is read-only, as input
736 sections have not yet been mapped to output sections.
737 Tentatively set the flag for now, and correct in
738 adjust_dynamic_symbol. */
739 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
ec338859 740
0451c93c
MS		 741 /* We may need a .plt entry if the function this reloc
742 refers to is in a shared lib. */
743 h->plt.refcount += 1;
744 }
a85d7ed0
NC		 745
746 /* If we are creating a shared library, and this is a reloc
0451c93c
MS		 747 against a global symbol, or a non PC relative reloc
748 against a local symbol, then we need to copy the reloc
749 into the shared library. However, if we are linking with
750 -Bsymbolic, we do not need to copy a reloc against a
751 global symbol which is defined in an object we are
752 including in the link (i.e., DEF_REGULAR is set). At
753 this point we have not seen all the input files, so it is
754 possible that DEF_REGULAR is not set now but will be set
755 later (it is never cleared). In case of a weak definition,
756 DEF_REGULAR may be cleared later by a strong definition in
757 a shared library. We account for that possibility below by
758 storing information in the relocs_copied field of the hash
759 table entry. A similar situation occurs when creating
760 shared libraries and symbol visibility changes render the
761 symbol local.
762
763 If on the other hand, we are creating an executable, we
764 may need to keep relocations for symbols satisfied by a
765 dynamic library if we manage to avoid copy relocs for the
766 symbol. */
767 if ((info->shared
768 && (sec->flags & SEC_ALLOC) != 0
ec338859 769 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
0451c93c 770 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
befc3abb 771 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
0451c93c
MS		 772 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
773 || (h != NULL
774 && (! info->symbolic
775 || h->root.type == bfd_link_hash_defweak
776 || (h->elf_link_hash_flags
777 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
778 || (!info->shared
779 && (sec->flags & SEC_ALLOC) != 0
780 && h != NULL
781 && (h->root.type == bfd_link_hash_defweak
782 || (h->elf_link_hash_flags
783 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
a85d7ed0 784 {
ec338859
AM		 785 struct elf_s390_dyn_relocs *p;
786 struct elf_s390_dyn_relocs **head;
787
0451c93c
MS		 788 /* We must copy these reloc types into the output file.
789 Create a reloc section in dynobj and make room for
790 this reloc. */
a85d7ed0
NC		 791 if (sreloc == NULL)
792 {
793 const char *name;
0451c93c 794 bfd *dynobj;
ec338859 795
a85d7ed0
NC		 796 name = (bfd_elf_string_from_elf_section
797 (abfd,
798 elf_elfheader (abfd)->e_shstrndx,
799 elf_section_data (sec)->rel_hdr.sh_name));
800 if (name == NULL)
801 return false;
802
0451c93c
MS		 803 if (strncmp (name, ".rela", 5) != 0
804 || strcmp (bfd_get_section_name (abfd, sec),
805 name + 5) != 0)
806 {
807 (*_bfd_error_handler)
808 (_("%s: bad relocation section name `%s\'"),
809 bfd_archive_filename (abfd), name);
810 }
811
812 if (htab->elf.dynobj == NULL)
813 htab->elf.dynobj = abfd;
a85d7ed0 814
0451c93c 815 dynobj = htab->elf.dynobj;
a85d7ed0
NC		 816 sreloc = bfd_get_section_by_name (dynobj, name);
817 if (sreloc == NULL)
818 {
819 flagword flags;
820
821 sreloc = bfd_make_section (dynobj, name);
822 flags = (SEC_HAS_CONTENTS | SEC_READONLY
823 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
824 if ((sec->flags & SEC_ALLOC) != 0)
825 flags |= SEC_ALLOC | SEC_LOAD;
826 if (sreloc == NULL
827 || ! bfd_set_section_flags (dynobj, sreloc, flags)
828 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
829 return false;
830 }
0451c93c 831 elf_section_data (sec)->sreloc = sreloc;
a85d7ed0
NC		 832 }
833
0451c93c
MS		 834 /* If this is a global symbol, we count the number of
835 relocations we need for this symbol. */
836 if (h != NULL)
a85d7ed0 837 {
ec338859 838 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
0451c93c
MS		 839 }
840 else
841 {
ec338859
AM		 842 /* Track dynamic relocs needed for local syms too.
843 We really need local syms available to do this
844 easily. Oh well. */
845
846 asection *s;
847 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
848 sec, r_symndx);
849 if (s == NULL)
850 return false;
851
852 head = ((struct elf_s390_dyn_relocs **)
853 &elf_section_data (s)->local_dynrel);
854 }
855
856 p = *head;
857 if (p == NULL || p->sec != sec)
858 {
859 bfd_size_type amt = sizeof *p;
860 p = ((struct elf_s390_dyn_relocs *)
861 bfd_alloc (htab->elf.dynobj, amt));
862 if (p == NULL)
863 return false;
864 p->next = *head;
865 *head = p;
866 p->sec = sec;
867 p->count = 0;
868 p->pc_count = 0;
a85d7ed0 869 }
ec338859
AM		 870
871 p->count += 1;
872 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
873 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
befc3abb 874 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
ec338859
AM		 875 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
876 p->pc_count += 1;
a85d7ed0 877 }
a85d7ed0 878 break;
ec338859 879
a85d7ed0
NC		 880 /* This relocation describes the C++ object vtable hierarchy.
881 Reconstruct it for later use during GC. */
882 case R_390_GNU_VTINHERIT:
883 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
884 return false;
885 break;
ec338859 886
a85d7ed0
NC		 887 /* This relocation describes which C++ vtable entries are actually
888 used. Record for later use during GC. */
889 case R_390_GNU_VTENTRY:
db727808 890 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
a85d7ed0
NC		 891 return false;
892 break;
ec338859 893
a85d7ed0
NC		 894 default:
895 break;
896 }
897 }
898
899 return true;
900}
901
902/* Return the section that should be marked against GC for a given
903 relocation. */
904
905static asection *
1e2f5b6e
AM		 906elf_s390_gc_mark_hook (sec, info, rel, h, sym)
907 asection *sec;
a85d7ed0
NC		 908 struct bfd_link_info *info ATTRIBUTE_UNUSED;
909 Elf_Internal_Rela *rel;
910 struct elf_link_hash_entry *h;
911 Elf_Internal_Sym *sym;
912{
913 if (h != NULL)
914 {
915 switch (ELF32_R_TYPE (rel->r_info))
916 {
917 case R_390_GNU_VTINHERIT:
918 case R_390_GNU_VTENTRY:
919 break;
920
921 default:
922 switch (h->root.type)
923 {
924 case bfd_link_hash_defined:
925 case bfd_link_hash_defweak:
926 return h->root.u.def.section;
927
928 case bfd_link_hash_common:
929 return h->root.u.c.p->section;
930
931 default:
932 break;
933 }
934 }
935 }
936 else
1e2f5b6e 937 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
a85d7ed0
NC		 938
939 return NULL;
940}
941
942/* Update the got entry reference counts for the section being removed. */
943
944static boolean
945elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
0451c93c
MS		 946 bfd *abfd;
947 struct bfd_link_info *info;
948 asection *sec;
949 const Elf_Internal_Rela *relocs;
a85d7ed0
NC		 950{
951 Elf_Internal_Shdr *symtab_hdr;
952 struct elf_link_hash_entry **sym_hashes;
953 bfd_signed_vma *local_got_refcounts;
954 const Elf_Internal_Rela *rel, *relend;
955 unsigned long r_symndx;
956 struct elf_link_hash_entry *h;
a85d7ed0 957
ec338859 958 elf_section_data (sec)->local_dynrel = NULL;
a85d7ed0 959
0451c93c
MS		 960 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
961 sym_hashes = elf_sym_hashes (abfd);
962 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0
NC		 963
964 relend = relocs + sec->reloc_count;
965 for (rel = relocs; rel < relend; rel++)
966 switch (ELF32_R_TYPE (rel->r_info))
967 {
968 case R_390_GOT12:
969 case R_390_GOT16:
970 case R_390_GOT32:
971 case R_390_GOTOFF:
972 case R_390_GOTPC:
befc3abb
MS		 973 case R_390_GOTPCDBL:
974 case R_390_GOTENT:
a85d7ed0
NC		 975 r_symndx = ELF32_R_SYM (rel->r_info);
976 if (r_symndx >= symtab_hdr->sh_info)
977 {
978 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
979 if (h->got.refcount > 0)
0451c93c 980 h->got.refcount -= 1;
a85d7ed0
NC		 981 }
982 else if (local_got_refcounts != NULL)
983 {
984 if (local_got_refcounts[r_symndx] > 0)
0451c93c
MS		 985 local_got_refcounts[r_symndx] -= 1;
986 }
987 break;
988
989 case R_390_8:
990 case R_390_12:
991 case R_390_16:
992 case R_390_32:
993 case R_390_PC16:
994 case R_390_PC16DBL:
befc3abb 995 case R_390_PC32DBL:
0451c93c
MS		 996 case R_390_PC32:
997 r_symndx = ELF32_R_SYM (rel->r_info);
998 if (r_symndx >= symtab_hdr->sh_info)
999 {
1000 struct elf_s390_link_hash_entry *eh;
1001 struct elf_s390_dyn_relocs **pp;
1002 struct elf_s390_dyn_relocs *p;
1003
1004 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1005
1006 if (!info->shared && h->plt.refcount > 0)
1007 h->plt.refcount -= 1;
1008
1009 eh = (struct elf_s390_link_hash_entry *) h;
1010
1011 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1012 if (p->sec == sec)
1013 {
1014 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1015 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
befc3abb 1016 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
0451c93c
MS		 1017 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1018 p->pc_count -= 1;
1019 p->count -= 1;
1020 if (p->count == 0)
1021 *pp = p->next;
1022 break;
1023 }
a85d7ed0
NC		 1024 }
1025 break;
1026
1027 case R_390_PLT16DBL:
befc3abb 1028 case R_390_PLT32DBL:
a85d7ed0
NC		 1029 case R_390_PLT32:
1030 r_symndx = ELF32_R_SYM (rel->r_info);
1031 if (r_symndx >= symtab_hdr->sh_info)
1032 {
1033 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1034 if (h->plt.refcount > 0)
1035 h->plt.refcount -= 1;
1036 }
1037 break;
1038
1039 default:
1040 break;
1041 }
1042
1043 return true;
1044}
1045
1046/* Adjust a symbol defined by a dynamic object and referenced by a
1047 regular object. The current definition is in some section of the
1048 dynamic object, but we're not including those sections. We have to
1049 change the definition to something the rest of the link can
1050 understand. */
1051
1052static boolean
1053elf_s390_adjust_dynamic_symbol (info, h)
1054 struct bfd_link_info *info;
1055 struct elf_link_hash_entry *h;
1056{
0451c93c
MS		 1057 struct elf_s390_link_hash_table *htab;
1058 struct elf_s390_link_hash_entry * eh;
1059 struct elf_s390_dyn_relocs *p;
a85d7ed0
NC		 1060 asection *s;
1061 unsigned int power_of_two;
1062
a85d7ed0
NC		 1063 /* If this is a function, put it in the procedure linkage table. We
1064 will fill in the contents of the procedure linkage table later
cedb70c5 1065 (although we could actually do it here). */
a85d7ed0
NC		 1066 if (h->type == STT_FUNC
1067 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1068 {
0451c93c
MS		 1069 if (h->plt.refcount <= 0
1070 || (! info->shared
1071 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
f9cd9119
MS		 1072 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1073 && h->root.type != bfd_link_hash_undefweak
1074 && h->root.type != bfd_link_hash_undefined))
a85d7ed0
NC		 1075 {
1076 /* This case can occur if we saw a PLT32 reloc in an input
1077 file, but the symbol was never referred to by a dynamic
1078 object, or if all references were garbage collected. In
1079 such a case, we don't actually need to build a procedure
1080 linkage table, and we can just do a PC32 reloc instead. */
1081 h->plt.offset = (bfd_vma) -1;
1082 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
a85d7ed0
NC		 1083 }
1084
a85d7ed0
NC		 1085 return true;
1086 }
bbd7ec4a 1087 else
0451c93c
MS		 1088 /* It's possible that we incorrectly decided a .plt reloc was
1089 needed for an R_390_PC32 reloc to a non-function sym in
1090 check_relocs. We can't decide accurately between function and
1091 non-function syms in check-relocs; Objects loaded later in
1092 the link may change h->type. So fix it now. */
bbd7ec4a 1093 h->plt.offset = (bfd_vma) -1;
a85d7ed0
NC		 1094
1095 /* If this is a weak symbol, and there is a real definition, the
1096 processor independent code will have arranged for us to see the
1097 real definition first, and we can just use the same value. */
1098 if (h->weakdef != NULL)
1099 {
1100 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1101 || h->weakdef->root.type == bfd_link_hash_defweak);
1102 h->root.u.def.section = h->weakdef->root.u.def.section;
1103 h->root.u.def.value = h->weakdef->root.u.def.value;
1104 return true;
1105 }
1106
1107 /* This is a reference to a symbol defined by a dynamic object which
1108 is not a function. */
1109
1110 /* If we are creating a shared library, we must presume that the
1111 only references to the symbol are via the global offset table.
1112 For such cases we need not do anything here; the relocations will
1113 be handled correctly by relocate_section. */
1114 if (info->shared)
1115 return true;
1116
1117 /* If there are no references to this symbol that do not use the
1118 GOT, we don't need to generate a copy reloc. */
1119 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1120 return true;
1121
0451c93c
MS		 1122 /* If -z nocopyreloc was given, we won't generate them either. */
1123 if (info->nocopyreloc)
1124 {
1125 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1126 return true;
1127 }
1128
1129 eh = (struct elf_s390_link_hash_entry *) h;
1130 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1131 {
1132 s = p->sec->output_section;
1133 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1134 break;
1135 }
1136
1137 /* If we didn't find any dynamic relocs in read-only sections, then
ec338859 1138 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
0451c93c
MS		 1139 if (p == NULL)
1140 {
1141 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1142 return true;
1143 }
1144
a85d7ed0
NC		 1145 /* We must allocate the symbol in our .dynbss section, which will
1146 become part of the .bss section of the executable. There will be
1147 an entry for this symbol in the .dynsym section. The dynamic
1148 object will contain position independent code, so all references
1149 from the dynamic object to this symbol will go through the global
1150 offset table. The dynamic linker will use the .dynsym entry to
1151 determine the address it must put in the global offset table, so
1152 both the dynamic object and the regular object will refer to the
1153 same memory location for the variable. */
1154
0451c93c 1155 htab = elf_s390_hash_table (info);
a85d7ed0 1156
0451c93c
MS		 1157 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1158 copy the initial value out of the dynamic object and into the
1159 runtime process image. */
a85d7ed0
NC		 1160 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1161 {
0451c93c 1162 htab->srelbss->_raw_size += sizeof (Elf32_External_Rela);
a85d7ed0
NC		 1163 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1164 }
1165
1166 /* We need to figure out the alignment required for this symbol. I
1167 have no idea how ELF linkers handle this. */
1168 power_of_two = bfd_log2 (h->size);
1169 if (power_of_two > 3)
1170 power_of_two = 3;
1171
1172 /* Apply the required alignment. */
0451c93c
MS		 1173 s = htab->sdynbss;
1174 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1175 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
a85d7ed0 1176 {
0451c93c 1177 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
a85d7ed0
NC		 1178 return false;
1179 }
1180
1181 /* Define the symbol as being at this point in the section. */
1182 h->root.u.def.section = s;
1183 h->root.u.def.value = s->_raw_size;
1184
1185 /* Increment the section size to make room for the symbol. */
1186 s->_raw_size += h->size;
1187
1188 return true;
1189}
1190
0451c93c
MS		 1191/* This is the condition under which elf_s390_finish_dynamic_symbol
1192 will be called from elflink.h. If elflink.h doesn't call our
1193 finish_dynamic_symbol routine, we'll need to do something about
1194 initializing any .plt and .got entries in elf_s390_relocate_section. */
1195#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1196 ((DYN) \
1197 && ((INFO)->shared \
1198 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1199 && ((H)->dynindx != -1 \
1200 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1201
1202/* Allocate space in .plt, .got and associated reloc sections for
1203 dynamic relocs. */
1204
1205static boolean
1206allocate_dynrelocs (h, inf)
1207 struct elf_link_hash_entry *h;
1208 PTR inf;
1209{
1210 struct bfd_link_info *info;
1211 struct elf_s390_link_hash_table *htab;
1212 struct elf_s390_link_hash_entry *eh;
1213 struct elf_s390_dyn_relocs *p;
1214
e92d460e 1215 if (h->root.type == bfd_link_hash_indirect)
0451c93c
MS		 1216 return true;
1217
e92d460e
AM		 1218 if (h->root.type == bfd_link_hash_warning)
1219 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1220
0451c93c
MS		 1221 info = (struct bfd_link_info *) inf;
1222 htab = elf_s390_hash_table (info);
1223
1224 if (htab->elf.dynamic_sections_created
1225 && h->plt.refcount > 0)
1226 {
1227 /* Make sure this symbol is output as a dynamic symbol.
1228 Undefined weak syms won't yet be marked as dynamic. */
1229 if (h->dynindx == -1
1230 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1231 {
1232 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1233 return false;
1234 }
1235
1236 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
1237 {
1238 asection *s = htab->splt;
1239
1240 /* If this is the first .plt entry, make room for the special
1241 first entry. */
1242 if (s->_raw_size == 0)
1243 s->_raw_size += PLT_FIRST_ENTRY_SIZE;
1244
1245 h->plt.offset = s->_raw_size;
1246
1247 /* If this symbol is not defined in a regular file, and we are
1248 not generating a shared library, then set the symbol to this
1249 location in the .plt. This is required to make function
1250 pointers compare as equal between the normal executable and
1251 the shared library. */
1252 if (! info->shared
1253 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1254 {
1255 h->root.u.def.section = s;
1256 h->root.u.def.value = h->plt.offset;
1257 }
ec338859 1258
0451c93c
MS		 1259 /* Make room for this entry. */
1260 s->_raw_size += PLT_ENTRY_SIZE;
ec338859 1261
0451c93c
MS		 1262 /* We also need to make an entry in the .got.plt section, which
1263 will be placed in the .got section by the linker script. */
1264 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1265
1266 /* We also need to make an entry in the .rela.plt section. */
1267 htab->srelplt->_raw_size += sizeof (Elf32_External_Rela);
1268 }
1269 else
1270 {
1271 h->plt.offset = (bfd_vma) -1;
1272 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1273 }
ec338859 1274 }
0451c93c
MS		 1275 else
1276 {
1277 h->plt.offset = (bfd_vma) -1;
1278 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
ec338859
AM		 1279 }
1280
0451c93c
MS		 1281 if (h->got.refcount > 0)
1282 {
1283 asection *s;
1284 boolean dyn;
1285
1286 /* Make sure this symbol is output as a dynamic symbol.
1287 Undefined weak syms won't yet be marked as dynamic. */
1288 if (h->dynindx == -1
1289 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1290 {
1291 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1292 return false;
1293 }
1294
1295 s = htab->sgot;
1296 h->got.offset = s->_raw_size;
1297 s->_raw_size += GOT_ENTRY_SIZE;
1298 dyn = htab->elf.dynamic_sections_created;
1299 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
1300 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
1301 }
1302 else
1303 h->got.offset = (bfd_vma) -1;
1304
1305 eh = (struct elf_s390_link_hash_entry *) h;
1306 if (eh->dyn_relocs == NULL)
1307 return true;
1308
1309 /* In the shared -Bsymbolic case, discard space allocated for
1310 dynamic pc-relative relocs against symbols which turn out to be
1311 defined in regular objects. For the normal shared case, discard
1312 space for pc-relative relocs that have become local due to symbol
1313 visibility changes. */
1314
1315 if (info->shared)
1316 {
1317 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1318 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1319 || info->symbolic))
1320 {
1321 struct elf_s390_dyn_relocs **pp;
1322
1323 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1324 {
1325 p->count -= p->pc_count;
1326 p->pc_count = 0;
1327 if (p->count == 0)
1328 *pp = p->next;
1329 else
1330 pp = &p->next;
1331 }
1332 }
1333 }
1334 else
1335 {
1336 /* For the non-shared case, discard space for relocs against
1337 symbols which turn out to need copy relocs or are not
1338 dynamic. */
1339
1340 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1341 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1342 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1343 || (htab->elf.dynamic_sections_created
1344 && (h->root.type == bfd_link_hash_undefweak
1345 || h->root.type == bfd_link_hash_undefined))))
1346 {
1347 /* Make sure this symbol is output as a dynamic symbol.
1348 Undefined weak syms won't yet be marked as dynamic. */
1349 if (h->dynindx == -1
1350 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1351 {
1352 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1353 return false;
1354 }
1355
1356 /* If that succeeded, we know we'll be keeping all the
1357 relocs. */
1358 if (h->dynindx != -1)
1359 goto keep;
1360 }
1361
1362 eh->dyn_relocs = NULL;
1363
ec338859 1364 keep: ;
0451c93c
MS		 1365 }
1366
1367 /* Finally, allocate space. */
1368 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1369 {
1370 asection *sreloc = elf_section_data (p->sec)->sreloc;
1371 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
1372 }
1373
1374 return true;
1375}
1376
1377/* Find any dynamic relocs that apply to read-only sections. */
1378
1379static boolean
1380readonly_dynrelocs (h, inf)
1381 struct elf_link_hash_entry *h;
1382 PTR inf;
1383{
1384 struct elf_s390_link_hash_entry *eh;
1385 struct elf_s390_dyn_relocs *p;
1386
e92d460e
AM		 1387 if (h->root.type == bfd_link_hash_warning)
1388 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1389
0451c93c
MS		 1390 eh = (struct elf_s390_link_hash_entry *) h;
1391 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1392 {
1393 asection *s = p->sec->output_section;
1394
1395 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1396 {
1397 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1398
1399 info->flags |= DF_TEXTREL;
1400
1401 /* Not an error, just cut short the traversal. */
1402 return false;
1403 }
1404 }
1405 return true;
1406}
1407
a85d7ed0
NC		 1408/* Set the sizes of the dynamic sections. */
1409
1410static boolean
1411elf_s390_size_dynamic_sections (output_bfd, info)
29c2fb7c 1412 bfd *output_bfd ATTRIBUTE_UNUSED;
a85d7ed0
NC		 1413 struct bfd_link_info *info;
1414{
0451c93c 1415 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1416 bfd *dynobj;
1417 asection *s;
a85d7ed0 1418 boolean relocs;
0451c93c 1419 bfd *ibfd;
a85d7ed0 1420
0451c93c
MS		 1421 htab = elf_s390_hash_table (info);
1422 dynobj = htab->elf.dynobj;
1423 if (dynobj == NULL)
1424 abort ();
a85d7ed0 1425
0451c93c 1426 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 1427 {
1428 /* Set the contents of the .interp section to the interpreter. */
1429 if (! info->shared)
1430 {
1431 s = bfd_get_section_by_name (dynobj, ".interp");
0451c93c
MS		 1432 if (s == NULL)
1433 abort ();
a85d7ed0
NC		 1434 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1435 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1436 }
1437 }
a85d7ed0 1438
0451c93c
MS		 1439 /* Set up .got offsets for local syms, and space for local dynamic
1440 relocs. */
1441 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
a85d7ed0 1442 {
0451c93c
MS		 1443 bfd_signed_vma *local_got;
1444 bfd_signed_vma *end_local_got;
1445 bfd_size_type locsymcount;
1446 Elf_Internal_Shdr *symtab_hdr;
1447 asection *srela;
a85d7ed0 1448
0451c93c 1449 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
a85d7ed0
NC		 1450 continue;
1451
0451c93c 1452 for (s = ibfd->sections; s != NULL; s = s->next)
a85d7ed0 1453 {
ec338859 1454 struct elf_s390_dyn_relocs *p;
0451c93c 1455
ec338859
AM		 1456 for (p = *((struct elf_s390_dyn_relocs **)
1457 &elf_section_data (s)->local_dynrel);
1458 p != NULL;
1459 p = p->next)
a85d7ed0 1460 {
ec338859
AM		 1461 if (!bfd_is_abs_section (p->sec)
1462 && bfd_is_abs_section (p->sec->output_section))
1463 {
1464 /* Input section has been discarded, either because
1465 it is a copy of a linkonce section or due to
1466 linker script /DISCARD/, so we'll be discarding
1467 the relocs too. */
1468 }
248866a8 1469 else if (p->count != 0)
ec338859
AM		 1470 {
1471 srela = elf_section_data (p->sec)->sreloc;
1472 srela->_raw_size += p->count * sizeof (Elf32_External_Rela);
248866a8
AM		 1473 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1474 info->flags |= DF_TEXTREL;
ec338859 1475 }
a85d7ed0
NC		 1476 }
1477 }
0451c93c
MS		 1478
1479 local_got = elf_local_got_refcounts (ibfd);
1480 if (!local_got)
1481 continue;
1482
1483 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1484 locsymcount = symtab_hdr->sh_info;
1485 end_local_got = local_got + locsymcount;
1486 s = htab->sgot;
1487 srela = htab->srelgot;
1488 for (; local_got < end_local_got; ++local_got)
a85d7ed0 1489 {
0451c93c 1490 if (*local_got > 0)
a85d7ed0 1491 {
0451c93c
MS		 1492 *local_got = s->_raw_size;
1493 s->_raw_size += GOT_ENTRY_SIZE;
1494 if (info->shared)
1495 srela->_raw_size += sizeof (Elf32_External_Rela);
a85d7ed0
NC		 1496 }
1497 else
0451c93c
MS		 1498 *local_got = (bfd_vma) -1;
1499 }
1500 }
1501
1502 /* Allocate global sym .plt and .got entries, and space for global
1503 sym dynamic relocs. */
1504 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1505
1506 /* We now have determined the sizes of the various dynamic sections.
1507 Allocate memory for them. */
1508 relocs = false;
1509 for (s = dynobj->sections; s != NULL; s = s->next)
1510 {
1511 if ((s->flags & SEC_LINKER_CREATED) == 0)
1512 continue;
1513
1514 if (s == htab->splt
1515 || s == htab->sgot
1516 || s == htab->sgotplt)
1517 {
1518 /* Strip this section if we don't need it; see the
1519 comment below. */
a85d7ed0 1520 }
0451c93c
MS		 1521 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
1522 {
1523 if (s->_raw_size != 0 && s != htab->srelplt)
1524 relocs = true;
ec338859 1525
0451c93c
MS		 1526 /* We use the reloc_count field as a counter if we need
1527 to copy relocs into the output file. */
1528 s->reloc_count = 0;
1529 }
1530 else
a85d7ed0
NC		 1531 {
1532 /* It's not one of our sections, so don't allocate space. */
1533 continue;
1534 }
1535
0451c93c 1536 if (s->_raw_size == 0)
a85d7ed0 1537 {
0451c93c
MS		 1538 /* If we don't need this section, strip it from the
1539 output file. This is to handle .rela.bss and
1540 .rela.plt. We must create it in
1541 create_dynamic_sections, because it must be created
1542 before the linker maps input sections to output
1543 sections. The linker does that before
1544 adjust_dynamic_symbol is called, and it is that
1545 function which decides whether anything needs to go
1546 into these sections. */
1547
a85d7ed0
NC		 1548 _bfd_strip_section_from_output (info, s);
1549 continue;
1550 }
1551
0451c93c
MS		 1552 /* Allocate memory for the section contents. We use bfd_zalloc
1553 here in case unused entries are not reclaimed before the
1554 section's contents are written out. This should not happen,
1555 but this way if it does, we get a R_390_NONE reloc instead
1556 of garbage. */
1557 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1558 if (s->contents == NULL)
a85d7ed0
NC		 1559 return false;
1560 }
ec338859 1561
0451c93c 1562 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 1563 {
1564 /* Add some entries to the .dynamic section. We fill in the
1565 values later, in elf_s390_finish_dynamic_sections, but we
1566 must add the entries now so that we get the correct size for
1567 the .dynamic section. The DT_DEBUG entry is filled in by the
1568 dynamic linker and used by the debugger. */
dc810e39
AM		 1569#define add_dynamic_entry(TAG, VAL) \
1570 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
ec338859 1571
a85d7ed0
NC		 1572 if (! info->shared)
1573 {
dc810e39 1574 if (!add_dynamic_entry (DT_DEBUG, 0))
a85d7ed0
NC		 1575 return false;
1576 }
ec338859 1577
0451c93c 1578 if (htab->splt->_raw_size != 0)
a85d7ed0 1579 {
dc810e39
AM		 1580 if (!add_dynamic_entry (DT_PLTGOT, 0)
1581 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1582 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1583 || !add_dynamic_entry (DT_JMPREL, 0))
a85d7ed0
NC		 1584 return false;
1585 }
ec338859 1586
a85d7ed0
NC		 1587 if (relocs)
1588 {
dc810e39
AM		 1589 if (!add_dynamic_entry (DT_RELA, 0)
1590 || !add_dynamic_entry (DT_RELASZ, 0)
1591 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
a85d7ed0 1592 return false;
a85d7ed0 1593
0451c93c
MS		 1594 /* If any dynamic relocs apply to a read-only section,
1595 then we need a DT_TEXTREL entry. */
248866a8
AM		 1596 if ((info->flags & DF_TEXTREL) == 0)
1597 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1598 (PTR) info);
ec338859 1599
0451c93c
MS		 1600 if ((info->flags & DF_TEXTREL) != 0)
1601 {
1602 if (!add_dynamic_entry (DT_TEXTREL, 0))
1603 return false;
1604 }
a85d7ed0
NC		 1605 }
1606 }
dc810e39 1607#undef add_dynamic_entry
ec338859 1608
a85d7ed0
NC		 1609 return true;
1610}
1611
a85d7ed0
NC		 1612/* Relocate a 390 ELF section. */
1613
1614static boolean
1615elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
1616 contents, relocs, local_syms, local_sections)
1617 bfd *output_bfd;
1618 struct bfd_link_info *info;
1619 bfd *input_bfd;
1620 asection *input_section;
1621 bfd_byte *contents;
1622 Elf_Internal_Rela *relocs;
1623 Elf_Internal_Sym *local_syms;
1624 asection **local_sections;
1625{
0451c93c 1626 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1627 Elf_Internal_Shdr *symtab_hdr;
1628 struct elf_link_hash_entry **sym_hashes;
1629 bfd_vma *local_got_offsets;
a85d7ed0
NC		 1630 Elf_Internal_Rela *rel;
1631 Elf_Internal_Rela *relend;
1632
b491616a
AM		 1633 if (info->relocateable)
1634 return true;
1635
0451c93c 1636 htab = elf_s390_hash_table (info);
a85d7ed0
NC		 1637 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1638 sym_hashes = elf_sym_hashes (input_bfd);
1639 local_got_offsets = elf_local_got_offsets (input_bfd);
1640
a85d7ed0
NC		 1641 rel = relocs;
1642 relend = relocs + input_section->reloc_count;
1643 for (; rel < relend; rel++)
1644 {
1645 int r_type;
1646 reloc_howto_type *howto;
1647 unsigned long r_symndx;
1648 struct elf_link_hash_entry *h;
1649 Elf_Internal_Sym *sym;
1650 asection *sec;
0451c93c 1651 bfd_vma off;
a85d7ed0 1652 bfd_vma relocation;
0451c93c 1653 boolean unresolved_reloc;
a85d7ed0 1654 bfd_reloc_status_type r;
ec338859 1655
a85d7ed0
NC		 1656 r_type = ELF32_R_TYPE (rel->r_info);
1657 if (r_type == (int) R_390_GNU_VTINHERIT
1658 || r_type == (int) R_390_GNU_VTENTRY)
1659 continue;
1660 if (r_type < 0 || r_type >= (int) R_390_max)
1661 {
1662 bfd_set_error (bfd_error_bad_value);
1663 return false;
1664 }
ec338859 1665
b491616a 1666 howto = elf_howto_table + r_type;
a85d7ed0 1667 r_symndx = ELF32_R_SYM (rel->r_info);
a85d7ed0
NC		 1668 h = NULL;
1669 sym = NULL;
1670 sec = NULL;
0451c93c 1671 unresolved_reloc = false;
a85d7ed0
NC		 1672 if (r_symndx < symtab_hdr->sh_info)
1673 {
1674 sym = local_syms + r_symndx;
1675 sec = local_sections[r_symndx];
f8df10f4 1676 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
a85d7ed0
NC		 1677 }
1678 else
1679 {
1680 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1681 while (h->root.type == bfd_link_hash_indirect
1682 || h->root.type == bfd_link_hash_warning)
1683 h = (struct elf_link_hash_entry *) h->root.u.i.link;
ec338859 1684
a85d7ed0
NC		 1685 if (h->root.type == bfd_link_hash_defined
1686 || h->root.type == bfd_link_hash_defweak)
1687 {
1688 sec = h->root.u.def.section;
27018c3f 1689 if (sec->output_section == NULL)
a85d7ed0 1690 {
0451c93c
MS		 1691 /* Set a flag that will be cleared later if we find a
1692 relocation value for this symbol. output_section
1693 is typically NULL for symbols satisfied by a shared
1694 library. */
1695 unresolved_reloc = true;
a85d7ed0
NC		 1696 relocation = 0;
1697 }
1698 else
1699 relocation = (h->root.u.def.value
1700 + sec->output_section->vma
1701 + sec->output_offset);
1702 }
1703 else if (h->root.type == bfd_link_hash_undefweak)
1704 relocation = 0;
671bae9c
NC		 1705 else if (info->shared
1706 && (!info->symbolic || info->allow_shlib_undefined)
a85d7ed0
NC		 1707 && !info->no_undefined
1708 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1709 relocation = 0;
1710 else
1711 {
1712 if (! ((*info->callbacks->undefined_symbol)
1713 (info, h->root.root.string, input_bfd,
1714 input_section, rel->r_offset,
0451c93c
MS		 1715 (!info->shared || info->no_undefined
1716 || ELF_ST_VISIBILITY (h->other)))))
a85d7ed0
NC		 1717 return false;
1718 relocation = 0;
1719 }
1720 }
ec338859 1721
a85d7ed0
NC		 1722 switch (r_type)
1723 {
1724 case R_390_GOT12:
1725 case R_390_GOT16:
1726 case R_390_GOT32:
befc3abb 1727 case R_390_GOTENT:
a85d7ed0
NC		 1728 /* Relocation is to the entry for this symbol in the global
1729 offset table. */
0451c93c
MS		 1730 if (htab->sgot == NULL)
1731 abort ();
ec338859 1732
a85d7ed0
NC		 1733 if (h != NULL)
1734 {
0451c93c 1735 boolean dyn;
ec338859 1736
a85d7ed0 1737 off = h->got.offset;
0451c93c
MS		 1738 dyn = htab->elf.dynamic_sections_created;
1739 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
a85d7ed0 1740 || (info->shared
0451c93c
MS		 1741 && (info->symbolic
1742 || h->dynindx == -1
1743 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
a85d7ed0
NC		 1744 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1745 {
1746 /* This is actually a static link, or it is a
1747 -Bsymbolic link and the symbol is defined
1748 locally, or the symbol was forced to be local
1749 because of a version file. We must initialize
1750 this entry in the global offset table. Since the
1751 offset must always be a multiple of 2, we use the
1752 least significant bit to record whether we have
1753 initialized it already.
1754
1755 When doing a dynamic link, we create a .rel.got
1756 relocation entry to initialize the value. This
1757 is done in the finish_dynamic_symbol routine. */
1758 if ((off & 1) != 0)
1759 off &= ~1;
1760 else
1761 {
1762 bfd_put_32 (output_bfd, relocation,
0451c93c 1763 htab->sgot->contents + off);
a85d7ed0
NC		 1764 h->got.offset |= 1;
1765 }
1766 }
0451c93c
MS		 1767 else
1768 unresolved_reloc = false;
a85d7ed0
NC		 1769 }
1770 else
1771 {
0451c93c
MS		 1772 if (local_got_offsets == NULL)
1773 abort ();
a85d7ed0
NC		 1774
1775 off = local_got_offsets[r_symndx];
1776
1777 /* The offset must always be a multiple of 4. We use
1778 the least significant bit to record whether we have
1779 already generated the necessary reloc. */
1780 if ((off & 1) != 0)
1781 off &= ~1;
1782 else
1783 {
0451c93c
MS		 1784 bfd_put_32 (output_bfd, relocation,
1785 htab->sgot->contents + off);
a85d7ed0
NC		 1786
1787 if (info->shared)
1788 {
1789 asection *srelgot;
1790 Elf_Internal_Rela outrel;
0451c93c 1791 Elf32_External_Rela *loc;
a85d7ed0 1792
0451c93c
MS		 1793 srelgot = htab->srelgot;
1794 if (srelgot == NULL)
1795 abort ();
a85d7ed0 1796
0451c93c
MS		 1797 outrel.r_offset = (htab->sgot->output_section->vma
1798 + htab->sgot->output_offset
a85d7ed0
NC		 1799 + off);
1800 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
1801 outrel.r_addend = relocation;
0451c93c
MS		 1802 loc = (Elf32_External_Rela *) srelgot->contents;
1803 loc += srelgot->reloc_count++;
1804 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
a85d7ed0
NC		 1805 }
1806
1807 local_got_offsets[r_symndx] |= 1;
1808 }
a85d7ed0
NC		 1809 }
1810
0451c93c
MS		 1811 if (off >= (bfd_vma) -2)
1812 abort ();
a85d7ed0 1813
0451c93c 1814 relocation = htab->sgot->output_offset + off;
befc3abb
MS		 1815
1816 /*
1817 * For @GOTENT the relocation is against the offset between
1818 * the instruction and the symbols entry in the GOT and not
1819 * between the start of the GOT and the symbols entry. We
1820 * add the vma of the GOT to get the correct value.
1821 */
1822 if (r_type == R_390_GOTENT)
1823 relocation += htab->sgot->output_section->vma;
1824
a85d7ed0 1825 break;
dc810e39 1826
a85d7ed0
NC		 1827 case R_390_GOTOFF:
1828 /* Relocation is relative to the start of the global offset
1829 table. */
1830
a85d7ed0
NC		 1831 /* Note that sgot->output_offset is not involved in this
1832 calculation. We always want the start of .got. If we
1833 defined _GLOBAL_OFFSET_TABLE in a different way, as is
1834 permitted by the ABI, we might have to change this
1835 calculation. */
0451c93c 1836 relocation -= htab->sgot->output_section->vma;
a85d7ed0
NC		 1837 break;
1838
1839 case R_390_GOTPC:
befc3abb 1840 case R_390_GOTPCDBL:
a85d7ed0 1841 /* Use global offset table as symbol value. */
0451c93c
MS		 1842 relocation = htab->sgot->output_section->vma;
1843 unresolved_reloc = false;
a85d7ed0
NC		 1844 break;
1845
1846 case R_390_PLT16DBL:
befc3abb 1847 case R_390_PLT32DBL:
a85d7ed0
NC		 1848 case R_390_PLT32:
1849 /* Relocation is to the entry for this symbol in the
1850 procedure linkage table. */
1851
1852 /* Resolve a PLT32 reloc against a local symbol directly,
1853 without using the procedure linkage table. */
1854 if (h == NULL)
1855 break;
1856
0451c93c
MS		 1857 if (h->plt.offset == (bfd_vma) -1
1858 || htab->splt == NULL)
a85d7ed0
NC		 1859 {
1860 /* We didn't make a PLT entry for this symbol. This
1861 happens when statically linking PIC code, or when
1862 using -Bsymbolic. */
1863 break;
1864 }
1865
0451c93c
MS		 1866 relocation = (htab->splt->output_section->vma
1867 + htab->splt->output_offset
a85d7ed0 1868 + h->plt.offset);
0451c93c 1869 unresolved_reloc = false;
a85d7ed0
NC		 1870 break;
1871
1872 case R_390_8:
1873 case R_390_16:
1874 case R_390_32:
1875 case R_390_PC16:
1876 case R_390_PC16DBL:
befc3abb 1877 case R_390_PC32DBL:
a85d7ed0 1878 case R_390_PC32:
ec338859
AM		 1879 /* r_symndx will be zero only for relocs against symbols
1880 from removed linkonce sections, or sections discarded by
1881 a linker script. */
1882 if (r_symndx == 0
1883 || (input_section->flags & SEC_ALLOC) == 0)
1884 break;
1885
0451c93c 1886 if ((info->shared
0451c93c
MS		 1887 && ((r_type != R_390_PC16
1888 && r_type != R_390_PC16DBL
befc3abb 1889 && r_type != R_390_PC32DBL
0451c93c
MS		 1890 && r_type != R_390_PC32)
1891 || (h != NULL
1892 && h->dynindx != -1
1893 && (! info->symbolic
1894 || (h->elf_link_hash_flags
1895 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1896 || (!info->shared
0451c93c
MS		 1897 && h != NULL
1898 && h->dynindx != -1
1899 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1900 && (((h->elf_link_hash_flags
1901 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1902 && (h->elf_link_hash_flags
1903 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1904 || h->root.type == bfd_link_hash_undefweak
1905 || h->root.type == bfd_link_hash_undefined)))
a85d7ed0
NC		 1906 {
1907 Elf_Internal_Rela outrel;
1908 boolean skip, relocate;
0451c93c
MS		 1909 asection *sreloc;
1910 Elf32_External_Rela *loc;
ec338859 1911
0451c93c
MS		 1912 /* When generating a shared object, these relocations
1913 are copied into the output file to be resolved at run
1914 time. */
ec338859 1915
a85d7ed0 1916 skip = false;
0bb2d96a 1917 relocate = false;
ec338859 1918
c629eae0
JJ		 1919 outrel.r_offset =
1920 _bfd_elf_section_offset (output_bfd, info, input_section,
1921 rel->r_offset);
1922 if (outrel.r_offset == (bfd_vma) -1)
1923 skip = true;
0bb2d96a
JJ		 1924 else if (outrel.r_offset == (bfd_vma) -2)
1925 skip = true, relocate = true;
a85d7ed0
NC		 1926 outrel.r_offset += (input_section->output_section->vma
1927 + input_section->output_offset);
ec338859 1928
a85d7ed0 1929 if (skip)
0bb2d96a 1930 memset (&outrel, 0, sizeof outrel);
0451c93c
MS		 1931 else if (h != NULL
1932 && h->dynindx != -1
1933 && (r_type == R_390_PC16
1934 || r_type == R_390_PC16DBL
befc3abb 1935 || r_type == R_390_PC32DBL
0451c93c
MS		 1936 || r_type == R_390_PC32
1937 || !info->shared
1938 || !info->symbolic
1939 || (h->elf_link_hash_flags
1940 & ELF_LINK_HASH_DEF_REGULAR) == 0))
a85d7ed0 1941 {
a85d7ed0 1942 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
27018c3f 1943 outrel.r_addend = rel->r_addend;
a85d7ed0
NC		 1944 }
1945 else
1946 {
0451c93c
MS		 1947 /* This symbol is local, or marked to become local. */
1948 relocate = true;
1949 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
1950 outrel.r_addend = relocation + rel->r_addend;
a85d7ed0 1951 }
ec338859 1952
0451c93c
MS		 1953 sreloc = elf_section_data (input_section)->sreloc;
1954 if (sreloc == NULL)
1955 abort ();
ec338859 1956
0451c93c
MS		 1957 loc = (Elf32_External_Rela *) sreloc->contents;
1958 loc += sreloc->reloc_count++;
1959 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
ec338859 1960
a85d7ed0
NC		 1961 /* If this reloc is against an external symbol, we do
1962 not want to fiddle with the addend. Otherwise, we
1963 need to include the symbol value so that it becomes
1964 an addend for the dynamic reloc. */
1965 if (! relocate)
1966 continue;
1967 }
0451c93c 1968 break;
ec338859 1969
0451c93c
MS		 1970 default:
1971 break;
1972 }
ec338859 1973
0451c93c
MS		 1974 if (unresolved_reloc
1975 && !(info->shared
1976 && (input_section->flags & SEC_DEBUGGING) != 0
1977 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
1978 (*_bfd_error_handler)
1979 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
1980 bfd_archive_filename (input_bfd),
1981 bfd_get_section_name (input_bfd, input_section),
1982 (long) rel->r_offset,
1983 h->root.root.string);
ec338859 1984
a85d7ed0 1985 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
0451c93c
MS		 1986 contents, rel->r_offset,
1987 relocation, rel->r_addend);
ec338859 1988
a85d7ed0
NC		 1989 if (r != bfd_reloc_ok)
1990 {
0451c93c 1991 const char *name;
ec338859 1992
0451c93c
MS		 1993 if (h != NULL)
1994 name = h->root.root.string;
1995 else
a85d7ed0 1996 {
0451c93c
MS		 1997 name = bfd_elf_string_from_elf_section (input_bfd,
1998 symtab_hdr->sh_link,
1999 sym->st_name);
2000 if (name == NULL)
2001 return false;
2002 if (*name == '\0')
2003 name = bfd_section_name (input_bfd, sec);
2004 }
ec338859 2005
0451c93c
MS		 2006 if (r == bfd_reloc_overflow)
2007 {
ec338859 2008
0451c93c
MS		 2009 if (! ((*info->callbacks->reloc_overflow)
2010 (info, name, howto->name, (bfd_vma) 0,
2011 input_bfd, input_section, rel->r_offset)))
2012 return false;
2013 }
2014 else
2015 {
2016 (*_bfd_error_handler)
2017 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2018 bfd_archive_filename (input_bfd),
2019 bfd_get_section_name (input_bfd, input_section),
2020 (long) rel->r_offset, name, (int) r);
2021 return false;
a85d7ed0
NC		 2022 }
2023 }
2024 }
ec338859 2025
a85d7ed0
NC		 2026 return true;
2027}
2028
2029/* Finish up dynamic symbol handling. We set the contents of various
2030 dynamic sections here. */
2031
2032static boolean
2033elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
2034 bfd *output_bfd;
2035 struct bfd_link_info *info;
2036 struct elf_link_hash_entry *h;
2037 Elf_Internal_Sym *sym;
2038{
0451c93c 2039 struct elf_s390_link_hash_table *htab;
ec338859 2040
0451c93c 2041 htab = elf_s390_hash_table (info);
ec338859 2042
a85d7ed0
NC		 2043 if (h->plt.offset != (bfd_vma) -1)
2044 {
0451c93c
MS		 2045 bfd_vma plt_index;
2046 bfd_vma got_offset;
a85d7ed0 2047 Elf_Internal_Rela rela;
0451c93c 2048 Elf32_External_Rela *loc;
a85d7ed0 2049 bfd_vma relative_offset;
ec338859 2050
a85d7ed0
NC		 2051 /* This symbol has an entry in the procedure linkage table. Set
2052 it up. */
ec338859 2053
0451c93c
MS		 2054 if (h->dynindx == -1
2055 || htab->splt == NULL
2056 || htab->sgotplt == NULL
2057 || htab->srelplt == NULL)
2058 abort ();
a85d7ed0 2059
dc810e39 2060 /* Calc. index no.
a85d7ed0
NC		 2061 Current offset - size first entry / entry size. */
2062 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
2063
2064 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2065 addr & GOT addr. */
2066 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
2067
2068 /* S390 uses halfwords for relative branch calc! */
dc810e39
AM		 2069 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
2070 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
a85d7ed0
NC		 2071 /* If offset is > 32768, branch to a previous branch
2072 390 can only handle +-64 K jumps. */
dc810e39
AM		 2073 if ( -32768 > (int) relative_offset )
2074 relative_offset =
2075 -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
a85d7ed0
NC		 2076
2077 /* Fill in the entry in the procedure linkage table. */
2078 if (!info->shared)
0451c93c
MS		 2079 {
2080 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
2081 htab->splt->contents + h->plt.offset);
2082 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
2083 htab->splt->contents + h->plt.offset + 4);
2084 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
2085 htab->splt->contents + h->plt.offset + 8);
2086 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
2087 htab->splt->contents + h->plt.offset + 12);
2088 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
2089 htab->splt->contents + h->plt.offset + 16);
2090 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2091 htab->splt->contents + h->plt.offset + 20);
2092 bfd_put_32 (output_bfd,
2093 (htab->sgotplt->output_section->vma
2094 + htab->sgotplt->output_offset
2095 + got_offset),
2096 htab->splt->contents + h->plt.offset + 24);
2097 }
a85d7ed0 2098 else if (got_offset < 4096)
0451c93c
MS		 2099 {
2100 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
2101 htab->splt->contents + h->plt.offset);
2102 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
2103 htab->splt->contents + h->plt.offset + 4);
2104 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
2105 htab->splt->contents + h->plt.offset + 8);
2106 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
2107 htab->splt->contents + h->plt.offset + 12);
2108 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
2109 htab->splt->contents + h->plt.offset + 16);
2110 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2111 htab->splt->contents + h->plt.offset + 20);
2112 bfd_put_32 (output_bfd, (bfd_vma) 0,
2113 htab->splt->contents + h->plt.offset + 24);
2114 }
a85d7ed0 2115 else if (got_offset < 32768)
0451c93c
MS		 2116 {
2117 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
2118 htab->splt->contents + h->plt.offset);
2119 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
2120 htab->splt->contents + h->plt.offset + 4);
2121 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
2122 htab->splt->contents + h->plt.offset + 8);
2123 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
2124 htab->splt->contents + h->plt.offset + 12);
2125 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
2126 htab->splt->contents + h->plt.offset + 16);
2127 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2128 htab->splt->contents + h->plt.offset + 20);
2129 bfd_put_32 (output_bfd, (bfd_vma) 0,
2130 htab->splt->contents + h->plt.offset + 24);
2131 }
a85d7ed0 2132 else
0451c93c
MS		 2133 {
2134 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
2135 htab->splt->contents + h->plt.offset);
2136 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
2137 htab->splt->contents + h->plt.offset + 4);
2138 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
2139 htab->splt->contents + h->plt.offset + 8);
2140 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
2141 htab->splt->contents + h->plt.offset + 12);
2142 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
2143 htab->splt->contents + h->plt.offset + 16);
2144 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2145 htab->splt->contents + h->plt.offset + 20);
2146 bfd_put_32 (output_bfd, got_offset,
2147 htab->splt->contents + h->plt.offset + 24);
2148 }
a85d7ed0
NC		 2149 /* Insert offset into reloc. table here. */
2150 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
0451c93c 2151 htab->splt->contents + h->plt.offset + 28);
a85d7ed0
NC		 2152
2153 /* Fill in the entry in the global offset table.
2154 Points to instruction after GOT offset. */
2155 bfd_put_32 (output_bfd,
0451c93c
MS		 2156 (htab->splt->output_section->vma
2157 + htab->splt->output_offset
a85d7ed0
NC		 2158 + h->plt.offset
2159 + 12),
0451c93c 2160 htab->sgotplt->contents + got_offset);
a85d7ed0 2161
0451c93c
MS		 2162 /* Fill in the entry in the .rela.plt section. */
2163 rela.r_offset = (htab->sgotplt->output_section->vma
2164 + htab->sgotplt->output_offset
2165 + got_offset);
2166 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
2167 rela.r_addend = 0;
2168 loc = (Elf32_External_Rela *) htab->srelplt->contents + plt_index;
2169 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
ec338859 2170
a85d7ed0
NC		 2171 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2172 {
2173 /* Mark the symbol as undefined, rather than as defined in
0451c93c
MS		 2174 the .plt section. Leave the value alone. This is a clue
2175 for the dynamic linker, to make function pointer
2176 comparisons work between an application and shared
ec338859 2177 library. */
a85d7ed0
NC		 2178 sym->st_shndx = SHN_UNDEF;
2179 }
2180 }
ec338859 2181
a85d7ed0
NC		 2182 if (h->got.offset != (bfd_vma) -1)
2183 {
a85d7ed0 2184 Elf_Internal_Rela rela;
0451c93c 2185 Elf32_External_Rela *loc;
a85d7ed0
NC		 2186
2187 /* This symbol has an entry in the global offset table. Set it
2188 up. */
2189
0451c93c
MS		 2190 if (htab->sgot == NULL || htab->srelgot == NULL)
2191 abort ();
a85d7ed0 2192
0451c93c
MS		 2193 rela.r_offset = (htab->sgot->output_section->vma
2194 + htab->sgot->output_offset
dc810e39 2195 + (h->got.offset &~ (bfd_vma) 1));
a85d7ed0
NC		 2196
2197 /* If this is a static link, or it is a -Bsymbolic link and the
2198 symbol is defined locally or was forced to be local because
2199 of a version file, we just want to emit a RELATIVE reloc.
2200 The entry in the global offset table will already have been
2201 initialized in the relocate_section function. */
0451c93c
MS		 2202 if (info->shared
2203 && (info->symbolic
2204 || h->dynindx == -1
2205 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2206 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2207 {
2208 BFD_ASSERT((h->got.offset & 1) != 0);
2209 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2210 rela.r_addend = (h->root.u.def.value
a85d7ed0
NC		 2211 + h->root.u.def.section->output_section->vma
2212 + h->root.u.def.section->output_offset);
2213 }
2214 else
2215 {
2216 BFD_ASSERT((h->got.offset & 1) == 0);
0451c93c 2217 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
a85d7ed0
NC		 2218 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
2219 rela.r_addend = 0;
2220 }
2221
0451c93c
MS		 2222 loc = (Elf32_External_Rela *) htab->srelgot->contents;
2223 loc += htab->srelgot->reloc_count++;
2224 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 2225 }
2226
2227 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2228 {
a85d7ed0 2229 Elf_Internal_Rela rela;
0451c93c 2230 Elf32_External_Rela *loc;
a85d7ed0
NC		 2231
2232 /* This symbols needs a copy reloc. Set it up. */
2233
0451c93c
MS		 2234 if (h->dynindx == -1
2235 || (h->root.type != bfd_link_hash_defined
2236 && h->root.type != bfd_link_hash_defweak)
2237 || htab->srelbss == NULL)
2238 abort ();
a85d7ed0
NC		 2239
2240 rela.r_offset = (h->root.u.def.value
2241 + h->root.u.def.section->output_section->vma
2242 + h->root.u.def.section->output_offset);
2243 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
2244 rela.r_addend = 0;
0451c93c
MS		 2245 loc = (Elf32_External_Rela *) htab->srelbss->contents;
2246 loc += htab->srelbss->reloc_count++;
2247 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 2248 }
2249
2250 /* Mark some specially defined symbols as absolute. */
2251 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2252 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2253 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2254 sym->st_shndx = SHN_ABS;
2255
2256 return true;
2257}
2258
0451c93c
MS		 2259/* Used to decide how to sort relocs in an optimal manner for the
2260 dynamic linker, before writing them out. */
2261
2262static enum elf_reloc_type_class
2263elf_s390_reloc_type_class (rela)
2264 const Elf_Internal_Rela *rela;
2265{
2266 switch ((int) ELF32_R_TYPE (rela->r_info))
2267 {
2268 case R_390_RELATIVE:
2269 return reloc_class_relative;
2270 case R_390_JMP_SLOT:
2271 return reloc_class_plt;
2272 case R_390_COPY:
2273 return reloc_class_copy;
2274 default:
2275 return reloc_class_normal;
2276 }
2277}
2278
a85d7ed0
NC		 2279/* Finish up the dynamic sections. */
2280
2281static boolean
2282elf_s390_finish_dynamic_sections (output_bfd, info)
2283 bfd *output_bfd;
2284 struct bfd_link_info *info;
2285{
0451c93c 2286 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 2287 bfd *dynobj;
2288 asection *sdyn;
a85d7ed0 2289
0451c93c
MS		 2290 htab = elf_s390_hash_table (info);
2291 dynobj = htab->elf.dynobj;
a85d7ed0
NC		 2292 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2293
0451c93c 2294 if (htab->elf.dynamic_sections_created)
a85d7ed0 2295 {
a85d7ed0
NC		 2296 Elf32_External_Dyn *dyncon, *dynconend;
2297
0451c93c
MS		 2298 if (sdyn == NULL || htab->sgot == NULL)
2299 abort ();
a85d7ed0
NC		 2300
2301 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2302 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2303 for (; dyncon < dynconend; dyncon++)
2304 {
2305 Elf_Internal_Dyn dyn;
a85d7ed0 2306 asection *s;
ec338859 2307
a85d7ed0 2308 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
ec338859 2309
a85d7ed0
NC		 2310 switch (dyn.d_tag)
2311 {
2312 default:
0451c93c 2313 continue;
ec338859 2314
a85d7ed0 2315 case DT_PLTGOT:
0451c93c
MS		 2316 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
2317 break;
ec338859 2318
a85d7ed0 2319 case DT_JMPREL:
0451c93c 2320 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
a85d7ed0
NC		 2321 break;
2322
2323 case DT_PLTRELSZ:
0451c93c 2324 s = htab->srelplt->output_section;
a85d7ed0
NC		 2325 if (s->_cooked_size != 0)
2326 dyn.d_un.d_val = s->_cooked_size;
2327 else
2328 dyn.d_un.d_val = s->_raw_size;
a85d7ed0
NC		 2329 break;
2330 }
0451c93c
MS		 2331
2332 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
a85d7ed0
NC		 2333 }
2334
2335 /* Fill in the special first entry in the procedure linkage table. */
0451c93c 2336 if (htab->splt && htab->splt->_raw_size > 0)
a85d7ed0 2337 {
0451c93c 2338 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
a85d7ed0 2339 if (info->shared)
0451c93c 2340 {
dc810e39 2341 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
0451c93c 2342 htab->splt->contents );
dc810e39 2343 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
0451c93c 2344 htab->splt->contents +4 );
dc810e39 2345 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
0451c93c 2346 htab->splt->contents +8 );
dc810e39 2347 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
0451c93c 2348 htab->splt->contents +12 );
dc810e39 2349 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
0451c93c 2350 htab->splt->contents +16 );
a85d7ed0
NC		 2351 }
2352 else
2353 {
0451c93c
MS		 2354 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
2355 htab->splt->contents );
dc810e39 2356 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
0451c93c 2357 htab->splt->contents +4 );
dc810e39 2358 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
0451c93c 2359 htab->splt->contents +8 );
dc810e39 2360 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
0451c93c 2361 htab->splt->contents +12 );
dc810e39 2362 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
0451c93c 2363 htab->splt->contents +16 );
dc810e39 2364 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
0451c93c 2365 htab->splt->contents +20 );
a85d7ed0 2366 bfd_put_32 (output_bfd,
0451c93c
MS		 2367 htab->sgotplt->output_section->vma
2368 + htab->sgotplt->output_offset,
2369 htab->splt->contents + 24);
a85d7ed0 2370 }
0451c93c
MS		 2371 elf_section_data (htab->splt->output_section)
2372 ->this_hdr.sh_entsize = 4;
a85d7ed0
NC		 2373 }
2374
2375 }
2376
0451c93c 2377 if (htab->sgotplt)
a85d7ed0 2378 {
0451c93c
MS		 2379 /* Fill in the first three entries in the global offset table. */
2380 if (htab->sgotplt->_raw_size > 0)
2381 {
2382 bfd_put_32 (output_bfd,
2383 (sdyn == NULL ? (bfd_vma) 0
2384 : sdyn->output_section->vma + sdyn->output_offset),
2385 htab->sgotplt->contents);
2386 /* One entry for shared object struct ptr. */
2387 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
2388 /* One entry for _dl_runtime_resolve. */
2389 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
2390 }
a85d7ed0 2391
0451c93c
MS		 2392 elf_section_data (htab->sgotplt->output_section)
2393 ->this_hdr.sh_entsize = 4;
2394 }
a85d7ed0
NC		 2395 return true;
2396}
2397
2398static boolean
2399elf_s390_object_p (abfd)
2400 bfd *abfd;
2401{
befc3abb 2402 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
a85d7ed0
NC		 2403}
2404
979f4a38
NC		 2405static boolean
2406elf_s390_grok_prstatus (abfd, note)
2407 bfd * abfd;
2408 Elf_Internal_Note * note;
2409{
2410 int offset;
2411 unsigned int raw_size;
2412
2413 switch (note->descsz)
2414 {
2415 default:
2416 return false;
2417
2418 case 224: /* S/390 Linux. */
2419 /* pr_cursig */
2420 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2421
2422 /* pr_pid */
2423 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
2424
2425 /* pr_reg */
2426 offset = 72;
2427 raw_size = 144;
2428 break;
2429 }
2430
2431 /* Make a ".reg/999" section. */
2432 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2433 raw_size, note->descpos + offset);
2434}
2435
a85d7ed0
NC		 2436#define TARGET_BIG_SYM bfd_elf32_s390_vec
2437#define TARGET_BIG_NAME "elf32-s390"
2438#define ELF_ARCH bfd_arch_s390
2439#define ELF_MACHINE_CODE EM_S390
2440#define ELF_MACHINE_ALT1 EM_S390_OLD
2441#define ELF_MAXPAGESIZE 0x1000
2442
2443#define elf_backend_can_gc_sections 1
51b64d56 2444#define elf_backend_can_refcount 1
a85d7ed0
NC		 2445#define elf_backend_want_got_plt 1
2446#define elf_backend_plt_readonly 1
2447#define elf_backend_want_plt_sym 0
2448#define elf_backend_got_header_size 12
2449#define elf_backend_plt_header_size PLT_ENTRY_SIZE
b491616a 2450#define elf_backend_rela_normal 1
a85d7ed0
NC		 2451
2452#define elf_info_to_howto elf_s390_info_to_howto
2453
a85d7ed0
NC		 2454#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
2455#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
2456#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
2457
2458#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
2459#define elf_backend_check_relocs elf_s390_check_relocs
0451c93c
MS		 2460#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
2461#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
a85d7ed0
NC		 2462#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
2463#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
2464#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
2465#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
0451c93c 2466#define elf_backend_reloc_type_class elf_s390_reloc_type_class
a85d7ed0
NC		 2467#define elf_backend_relocate_section elf_s390_relocate_section
2468#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
29c2fb7c 2469#define elf_backend_reloc_type_class elf_s390_reloc_type_class
979f4a38 2470#define elf_backend_grok_prstatus elf_s390_grok_prstatus
a85d7ed0
NC		 2471
2472#define elf_backend_object_p elf_s390_object_p
2473
2474#include "elf32-target.h"
GDB Binutils - Deliverables
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