1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
5 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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
28 static reloc_howto_type *elf_s390_reloc_type_lookup
29 PARAMS ((bfd *, bfd_reloc_code_real_type));
30 static void elf_s390_info_to_howto
31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
32 static boolean elf_s390_is_local_label_name
33 PARAMS ((bfd *, const char *));
34 static struct bfd_hash_entry *link_hash_newfunc
35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 static boolean create_got_section
39 PARAMS((bfd *, struct bfd_link_info *));
40 static boolean elf_s390_create_dynamic_sections
41 PARAMS((bfd *, struct bfd_link_info *));
42 static void elf_s390_copy_indirect_symbol
43 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
44 static boolean elf_s390_check_relocs
45 PARAMS ((bfd *, struct bfd_link_info *, asection *,
46 const Elf_Internal_Rela *));
47 static asection *elf_s390_gc_mark_hook
48 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
49 struct elf_link_hash_entry *, Elf_Internal_Sym *));
50 static boolean elf_s390_gc_sweep_hook
51 PARAMS ((bfd *, struct bfd_link_info *, asection *,
52 const Elf_Internal_Rela *));
53 static boolean elf_s390_adjust_dynamic_symbol
54 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
55 static boolean allocate_dynrelocs
56 PARAMS ((struct elf_link_hash_entry *, PTR));
57 static boolean readonly_dynrelocs
58 PARAMS ((struct elf_link_hash_entry *, PTR));
59 static boolean elf_s390_size_dynamic_sections
60 PARAMS ((bfd *, struct bfd_link_info *));
61 static boolean elf_s390_relocate_section
62 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
63 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
64 static boolean elf_s390_finish_dynamic_symbol
65 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
67 static enum elf_reloc_type_class elf_s390_reloc_type_class
68 PARAMS ((const Elf_Internal_Rela *));
69 static boolean elf_s390_finish_dynamic_sections
70 PARAMS ((bfd *, struct bfd_link_info *));
71 static boolean elf_s390_object_p PARAMS ((bfd *));
72 static boolean elf_s390_grok_prstatus PARAMS ((bfd *, Elf_Internal_Note *));
74 #define USE_RELA 1 /* We want RELA relocations, not REL. */
78 /* The relocation "howto" table. */
80 static reloc_howto_type elf_howto_table[] =
82 HOWTO (R_390_NONE, /* type */
84 0, /* size (0 = byte, 1 = short, 2 = long) */
86 false, /* pc_relative */
88 complain_overflow_dont, /* complain_on_overflow */
89 bfd_elf_generic_reloc, /* special_function */
90 "R_390_NONE", /* name */
91 false, /* partial_inplace */
94 false), /* pcrel_offset */
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),
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),
120 /* GNU extension to record C++ vtable hierarchy. */
121 static 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);
123 static reloc_howto_type elf32_s390_vtentry_howto =
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);
126 static reloc_howto_type *
127 elf_s390_reloc_type_lookup (abfd, code)
128 bfd *abfd ATTRIBUTE_UNUSED;
129 bfd_reloc_code_real_type code;
134 return &elf_howto_table[(int) R_390_NONE];
136 return &elf_howto_table[(int) R_390_8];
137 case BFD_RELOC_390_12:
138 return &elf_howto_table[(int) R_390_12];
140 return &elf_howto_table[(int) R_390_16];
142 return &elf_howto_table[(int) R_390_32];
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];
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];
181 case BFD_RELOC_VTABLE_INHERIT:
182 return &elf32_s390_vtinherit_howto;
183 case BFD_RELOC_VTABLE_ENTRY:
184 return &elf32_s390_vtentry_howto;
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. */
195 elf_s390_info_to_howto (abfd, cache_ptr, dst)
196 bfd *abfd ATTRIBUTE_UNUSED;
198 Elf_Internal_Rela *dst;
200 switch (ELF32_R_TYPE(dst->r_info))
202 case R_390_GNU_VTINHERIT:
203 cache_ptr->howto = &elf32_s390_vtinherit_howto;
206 case R_390_GNU_VTENTRY:
207 cache_ptr->howto = &elf32_s390_vtentry_howto;
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)];
217 elf_s390_is_local_label_name (abfd, name)
221 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
224 return _bfd_elf_is_local_label_name (abfd, name);
227 /* Functions for the 390 ELF linker. */
229 /* The name of the dynamic interpreter. This is put in the .interp
232 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
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. */
237 #define PLT_ENTRY_SIZE 32
239 #define GOT_ENTRY_SIZE 4
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. */
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)
251 Furthermore, only r 0 and 1 are free to use!!! */
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.
258 The code for position independand PLT entries looks like this:
260 r12 holds addr of the current GOT at entry to the PLT
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.
265 28(15) = Offset in symbol table
267 The loader must then find the module where the function is
268 and insert the address in the GOT.
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
274 PLT1: 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
278 RET1: 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
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:
289 PLT1: 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
292 RET1: 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
298 Second the one for GOT offsets < 32768:
300 PLT1: 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
304 RET1: 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
310 Total = 32 bytes per PLT entry
312 The code for static build PLT entries looks like this:
314 PLT1: 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
318 RET1: 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 */
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
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
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
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
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. */
353 /* The first entry in the PLT for PIC code:
356 ST 1,28(15) # R1 has offset into symbol table
357 L 1,4(12) # Get loader ino(object struct address)
358 ST 1,24(15) # Store address
359 L 1,8(12) # Entry address of loader in R1
360 BR 1 # Jump to loader
362 The first entry in the PLT for static code:
365 ST 1,28(15) # R1 has offset into symbol table
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
372 .long got # address of GOT */
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
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
387 /* The s390 linker needs to keep track of the number of relocs that it
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. */
393 struct elf_s390_dyn_relocs
395 struct elf_s390_dyn_relocs *next;
397 /* The input section of the reloc. */
400 /* Total number of relocs copied for the input section. */
403 /* Number of pc-relative relocs copied for the input section. */
404 bfd_size_type pc_count;
407 /* s390 ELF linker hash entry. */
409 struct elf_s390_link_hash_entry
411 struct elf_link_hash_entry elf;
413 /* Track dynamic relocs copied for this symbol. */
414 struct elf_s390_dyn_relocs *dyn_relocs;
417 /* s390 ELF linker hash table. */
419 struct elf_s390_link_hash_table
421 struct elf_link_hash_table elf;
423 /* Short-cuts to get to dynamic linker sections. */
432 /* Small local sym to section mapping cache. */
433 struct sym_sec_cache sym_sec;
436 /* Get the s390 ELF linker hash table from a link_info structure. */
438 #define elf_s390_hash_table(p) \
439 ((struct elf_s390_link_hash_table *) ((p)->hash))
441 /* Create an entry in an s390 ELF linker hash table. */
443 static struct bfd_hash_entry *
444 link_hash_newfunc (entry, table, string)
445 struct bfd_hash_entry *entry;
446 struct bfd_hash_table *table;
449 /* Allocate the structure if it has not already been allocated by a
453 entry = bfd_hash_allocate (table,
454 sizeof (struct elf_s390_link_hash_entry));
459 /* Call the allocation method of the superclass. */
460 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
463 struct elf_s390_link_hash_entry *eh;
465 eh = (struct elf_s390_link_hash_entry *) entry;
466 eh->dyn_relocs = NULL;
472 /* Create an s390 ELF linker hash table. */
474 static struct bfd_link_hash_table *
475 elf_s390_link_hash_table_create (abfd)
478 struct elf_s390_link_hash_table *ret;
479 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
481 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
485 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
498 ret->sym_sec.abfd = NULL;
500 return &ret->elf.root;
503 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
504 shortcuts to them in our hash table. */
507 create_got_section (dynobj, info)
509 struct bfd_link_info *info;
511 struct elf_s390_link_hash_table *htab;
513 if (! _bfd_elf_create_got_section (dynobj, info))
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)
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
528 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
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
538 elf_s390_create_dynamic_sections (dynobj, info)
540 struct bfd_link_info *info;
542 struct elf_s390_link_hash_table *htab;
544 htab = elf_s390_hash_table (info);
545 if (!htab->sgot && !create_got_section (dynobj, info))
548 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
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");
555 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
557 if (!htab->splt || !htab->srelplt || !htab->sdynbss
558 || (!info->shared && !htab->srelbss))
564 /* Copy the extra info we tack onto an elf_link_hash_entry. */
567 elf_s390_copy_indirect_symbol (dir, ind)
568 struct elf_link_hash_entry *dir, *ind;
570 struct elf_s390_link_hash_entry *edir, *eind;
572 edir = (struct elf_s390_link_hash_entry *) dir;
573 eind = (struct elf_s390_link_hash_entry *) ind;
575 if (eind->dyn_relocs != NULL)
577 if (edir->dyn_relocs != NULL)
579 struct elf_s390_dyn_relocs **pp;
580 struct elf_s390_dyn_relocs *p;
582 if (ind->root.type == bfd_link_hash_indirect)
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; )
589 struct elf_s390_dyn_relocs *q;
591 for (q = edir->dyn_relocs; q != NULL; q = q->next)
592 if (q->sec == p->sec)
594 q->pc_count += p->pc_count;
595 q->count += p->count;
602 *pp = edir->dyn_relocs;
605 edir->dyn_relocs = eind->dyn_relocs;
606 eind->dyn_relocs = NULL;
609 _bfd_elf_link_hash_copy_indirect (dir, ind);
612 /* Look through the relocs for a section during the first phase, and
613 allocate space in the global offset table or procedure linkage
617 elf_s390_check_relocs (abfd, info, sec, relocs)
619 struct bfd_link_info *info;
621 const Elf_Internal_Rela *relocs;
623 struct elf_s390_link_hash_table *htab;
624 Elf_Internal_Shdr *symtab_hdr;
625 struct elf_link_hash_entry **sym_hashes;
626 const Elf_Internal_Rela *rel;
627 const Elf_Internal_Rela *rel_end;
630 if (info->relocateable)
633 htab = elf_s390_hash_table (info);
634 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
635 sym_hashes = elf_sym_hashes (abfd);
639 rel_end = relocs + sec->reloc_count;
640 for (rel = relocs; rel < rel_end; rel++)
642 unsigned long r_symndx;
643 struct elf_link_hash_entry *h;
645 r_symndx = ELF32_R_SYM (rel->r_info);
647 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
649 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
650 bfd_archive_filename (abfd),
655 if (r_symndx < symtab_hdr->sh_info)
658 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
660 switch (ELF32_R_TYPE (rel->r_info))
666 /* This symbol requires a global offset table entry. */
669 h->got.refcount += 1;
673 bfd_signed_vma *local_got_refcounts;
675 /* This is a global offset table entry for a local symbol. */
676 local_got_refcounts = elf_local_got_refcounts (abfd);
677 if (local_got_refcounts == NULL)
681 size = symtab_hdr->sh_info;
682 size *= sizeof (bfd_signed_vma);
683 local_got_refcounts = ((bfd_signed_vma *)
684 bfd_zalloc (abfd, size));
685 if (local_got_refcounts == NULL)
687 elf_local_got_refcounts (abfd) = local_got_refcounts;
689 local_got_refcounts[r_symndx] += 1;
696 if (htab->sgot == NULL)
698 if (htab->elf.dynobj == NULL)
699 htab->elf.dynobj = abfd;
700 if (!create_got_section (htab->elf.dynobj, info))
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
715 /* If this is a local symbol, we resolve it directly without
716 creating a procedure linkage table entry. */
720 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
721 h->plt.refcount += 1;
731 if (h != NULL && !info->shared)
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;
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;
746 /* If we are creating a shared library, and this is a reloc
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
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
768 && (sec->flags & SEC_ALLOC) != 0
769 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
770 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
771 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
772 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
775 || h->root.type == bfd_link_hash_defweak
776 || (h->elf_link_hash_flags
777 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
779 && (sec->flags & SEC_ALLOC) != 0
781 && (h->root.type == bfd_link_hash_defweak
782 || (h->elf_link_hash_flags
783 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
785 struct elf_s390_dyn_relocs *p;
786 struct elf_s390_dyn_relocs **head;
788 /* We must copy these reloc types into the output file.
789 Create a reloc section in dynobj and make room for
796 name = (bfd_elf_string_from_elf_section
798 elf_elfheader (abfd)->e_shstrndx,
799 elf_section_data (sec)->rel_hdr.sh_name));
803 if (strncmp (name, ".rela", 5) != 0
804 || strcmp (bfd_get_section_name (abfd, sec),
807 (*_bfd_error_handler)
808 (_("%s: bad relocation section name `%s\'"),
809 bfd_archive_filename (abfd), name);
812 if (htab->elf.dynobj == NULL)
813 htab->elf.dynobj = abfd;
815 dynobj = htab->elf.dynobj;
816 sreloc = bfd_get_section_by_name (dynobj, name);
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;
827 || ! bfd_set_section_flags (dynobj, sreloc, flags)
828 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
831 elf_section_data (sec)->sreloc = sreloc;
834 /* If this is a global symbol, we count the number of
835 relocations we need for this symbol. */
838 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
842 /* Track dynamic relocs needed for local syms too.
843 We really need local syms available to do this
847 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
852 head = ((struct elf_s390_dyn_relocs **)
853 &elf_section_data (s)->local_dynrel);
857 if (p == NULL || p->sec != sec)
859 bfd_size_type amt = sizeof *p;
860 p = ((struct elf_s390_dyn_relocs *)
861 bfd_alloc (htab->elf.dynobj, amt));
872 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
873 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
874 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
875 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
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))
887 /* This relocation describes which C++ vtable entries are actually
888 used. Record for later use during GC. */
889 case R_390_GNU_VTENTRY:
890 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
902 /* Return the section that should be marked against GC for a given
906 elf_s390_gc_mark_hook (abfd, info, rel, h, sym)
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;
915 switch (ELF32_R_TYPE (rel->r_info))
917 case R_390_GNU_VTINHERIT:
918 case R_390_GNU_VTENTRY:
922 switch (h->root.type)
924 case bfd_link_hash_defined:
925 case bfd_link_hash_defweak:
926 return h->root.u.def.section;
928 case bfd_link_hash_common:
929 return h->root.u.c.p->section;
938 return bfd_section_from_elf_index (abfd, sym->st_shndx);
944 /* Update the got entry reference counts for the section being removed. */
947 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
949 struct bfd_link_info *info;
951 const Elf_Internal_Rela *relocs;
953 Elf_Internal_Shdr *symtab_hdr;
954 struct elf_link_hash_entry **sym_hashes;
955 bfd_signed_vma *local_got_refcounts;
956 const Elf_Internal_Rela *rel, *relend;
957 unsigned long r_symndx;
958 struct elf_link_hash_entry *h;
960 elf_section_data (sec)->local_dynrel = NULL;
962 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
963 sym_hashes = elf_sym_hashes (abfd);
964 local_got_refcounts = elf_local_got_refcounts (abfd);
966 relend = relocs + sec->reloc_count;
967 for (rel = relocs; rel < relend; rel++)
968 switch (ELF32_R_TYPE (rel->r_info))
977 r_symndx = ELF32_R_SYM (rel->r_info);
978 if (r_symndx >= symtab_hdr->sh_info)
980 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
981 if (h->got.refcount > 0)
982 h->got.refcount -= 1;
984 else if (local_got_refcounts != NULL)
986 if (local_got_refcounts[r_symndx] > 0)
987 local_got_refcounts[r_symndx] -= 1;
999 r_symndx = ELF32_R_SYM (rel->r_info);
1000 if (r_symndx >= symtab_hdr->sh_info)
1002 struct elf_s390_link_hash_entry *eh;
1003 struct elf_s390_dyn_relocs **pp;
1004 struct elf_s390_dyn_relocs *p;
1006 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1008 if (!info->shared && h->plt.refcount > 0)
1009 h->plt.refcount -= 1;
1011 eh = (struct elf_s390_link_hash_entry *) h;
1013 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1016 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1017 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1018 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1019 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1029 case R_390_PLT16DBL:
1030 case R_390_PLT32DBL:
1032 r_symndx = ELF32_R_SYM (rel->r_info);
1033 if (r_symndx >= symtab_hdr->sh_info)
1035 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1036 if (h->plt.refcount > 0)
1037 h->plt.refcount -= 1;
1048 /* Adjust a symbol defined by a dynamic object and referenced by a
1049 regular object. The current definition is in some section of the
1050 dynamic object, but we're not including those sections. We have to
1051 change the definition to something the rest of the link can
1055 elf_s390_adjust_dynamic_symbol (info, h)
1056 struct bfd_link_info *info;
1057 struct elf_link_hash_entry *h;
1059 struct elf_s390_link_hash_table *htab;
1060 struct elf_s390_link_hash_entry * eh;
1061 struct elf_s390_dyn_relocs *p;
1063 unsigned int power_of_two;
1065 /* If this is a function, put it in the procedure linkage table. We
1066 will fill in the contents of the procedure linkage table later
1067 (although we could actually do it here). */
1068 if (h->type == STT_FUNC
1069 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1071 if (h->plt.refcount <= 0
1073 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
1074 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1075 && h->root.type != bfd_link_hash_undefweak
1076 && h->root.type != bfd_link_hash_undefined))
1078 /* This case can occur if we saw a PLT32 reloc in an input
1079 file, but the symbol was never referred to by a dynamic
1080 object, or if all references were garbage collected. In
1081 such a case, we don't actually need to build a procedure
1082 linkage table, and we can just do a PC32 reloc instead. */
1083 h->plt.offset = (bfd_vma) -1;
1084 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1090 /* It's possible that we incorrectly decided a .plt reloc was
1091 needed for an R_390_PC32 reloc to a non-function sym in
1092 check_relocs. We can't decide accurately between function and
1093 non-function syms in check-relocs; Objects loaded later in
1094 the link may change h->type. So fix it now. */
1095 h->plt.offset = (bfd_vma) -1;
1097 /* If this is a weak symbol, and there is a real definition, the
1098 processor independent code will have arranged for us to see the
1099 real definition first, and we can just use the same value. */
1100 if (h->weakdef != NULL)
1102 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1103 || h->weakdef->root.type == bfd_link_hash_defweak);
1104 h->root.u.def.section = h->weakdef->root.u.def.section;
1105 h->root.u.def.value = h->weakdef->root.u.def.value;
1109 /* This is a reference to a symbol defined by a dynamic object which
1110 is not a function. */
1112 /* If we are creating a shared library, we must presume that the
1113 only references to the symbol are via the global offset table.
1114 For such cases we need not do anything here; the relocations will
1115 be handled correctly by relocate_section. */
1119 /* If there are no references to this symbol that do not use the
1120 GOT, we don't need to generate a copy reloc. */
1121 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1124 /* If -z nocopyreloc was given, we won't generate them either. */
1125 if (info->nocopyreloc)
1127 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1131 eh = (struct elf_s390_link_hash_entry *) h;
1132 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1134 s = p->sec->output_section;
1135 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1139 /* If we didn't find any dynamic relocs in read-only sections, then
1140 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1143 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1147 /* We must allocate the symbol in our .dynbss section, which will
1148 become part of the .bss section of the executable. There will be
1149 an entry for this symbol in the .dynsym section. The dynamic
1150 object will contain position independent code, so all references
1151 from the dynamic object to this symbol will go through the global
1152 offset table. The dynamic linker will use the .dynsym entry to
1153 determine the address it must put in the global offset table, so
1154 both the dynamic object and the regular object will refer to the
1155 same memory location for the variable. */
1157 htab = elf_s390_hash_table (info);
1159 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1160 copy the initial value out of the dynamic object and into the
1161 runtime process image. */
1162 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1164 htab->srelbss->_raw_size += sizeof (Elf32_External_Rela);
1165 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1168 /* We need to figure out the alignment required for this symbol. I
1169 have no idea how ELF linkers handle this. */
1170 power_of_two = bfd_log2 (h->size);
1171 if (power_of_two > 3)
1174 /* Apply the required alignment. */
1176 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1177 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1179 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1183 /* Define the symbol as being at this point in the section. */
1184 h->root.u.def.section = s;
1185 h->root.u.def.value = s->_raw_size;
1187 /* Increment the section size to make room for the symbol. */
1188 s->_raw_size += h->size;
1193 /* This is the condition under which elf_s390_finish_dynamic_symbol
1194 will be called from elflink.h. If elflink.h doesn't call our
1195 finish_dynamic_symbol routine, we'll need to do something about
1196 initializing any .plt and .got entries in elf_s390_relocate_section. */
1197 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1199 && ((INFO)->shared \
1200 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1201 && ((H)->dynindx != -1 \
1202 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1204 /* Allocate space in .plt, .got and associated reloc sections for
1208 allocate_dynrelocs (h, inf)
1209 struct elf_link_hash_entry *h;
1212 struct bfd_link_info *info;
1213 struct elf_s390_link_hash_table *htab;
1214 struct elf_s390_link_hash_entry *eh;
1215 struct elf_s390_dyn_relocs *p;
1217 if (h->root.type == bfd_link_hash_indirect)
1220 if (h->root.type == bfd_link_hash_warning)
1221 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1223 info = (struct bfd_link_info *) inf;
1224 htab = elf_s390_hash_table (info);
1226 if (htab->elf.dynamic_sections_created
1227 && h->plt.refcount > 0)
1229 /* Make sure this symbol is output as a dynamic symbol.
1230 Undefined weak syms won't yet be marked as dynamic. */
1231 if (h->dynindx == -1
1232 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1234 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1238 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
1240 asection *s = htab->splt;
1242 /* If this is the first .plt entry, make room for the special
1244 if (s->_raw_size == 0)
1245 s->_raw_size += PLT_FIRST_ENTRY_SIZE;
1247 h->plt.offset = s->_raw_size;
1249 /* If this symbol is not defined in a regular file, and we are
1250 not generating a shared library, then set the symbol to this
1251 location in the .plt. This is required to make function
1252 pointers compare as equal between the normal executable and
1253 the shared library. */
1255 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1257 h->root.u.def.section = s;
1258 h->root.u.def.value = h->plt.offset;
1261 /* Make room for this entry. */
1262 s->_raw_size += PLT_ENTRY_SIZE;
1264 /* We also need to make an entry in the .got.plt section, which
1265 will be placed in the .got section by the linker script. */
1266 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1268 /* We also need to make an entry in the .rela.plt section. */
1269 htab->srelplt->_raw_size += sizeof (Elf32_External_Rela);
1273 h->plt.offset = (bfd_vma) -1;
1274 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1279 h->plt.offset = (bfd_vma) -1;
1280 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1283 if (h->got.refcount > 0)
1288 /* Make sure this symbol is output as a dynamic symbol.
1289 Undefined weak syms won't yet be marked as dynamic. */
1290 if (h->dynindx == -1
1291 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1293 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1298 h->got.offset = s->_raw_size;
1299 s->_raw_size += GOT_ENTRY_SIZE;
1300 dyn = htab->elf.dynamic_sections_created;
1301 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
1302 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
1305 h->got.offset = (bfd_vma) -1;
1307 eh = (struct elf_s390_link_hash_entry *) h;
1308 if (eh->dyn_relocs == NULL)
1311 /* In the shared -Bsymbolic case, discard space allocated for
1312 dynamic pc-relative relocs against symbols which turn out to be
1313 defined in regular objects. For the normal shared case, discard
1314 space for pc-relative relocs that have become local due to symbol
1315 visibility changes. */
1319 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1320 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1323 struct elf_s390_dyn_relocs **pp;
1325 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1327 p->count -= p->pc_count;
1338 /* For the non-shared case, discard space for relocs against
1339 symbols which turn out to need copy relocs or are not
1342 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1343 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1344 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1345 || (htab->elf.dynamic_sections_created
1346 && (h->root.type == bfd_link_hash_undefweak
1347 || h->root.type == bfd_link_hash_undefined))))
1349 /* Make sure this symbol is output as a dynamic symbol.
1350 Undefined weak syms won't yet be marked as dynamic. */
1351 if (h->dynindx == -1
1352 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1354 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1358 /* If that succeeded, we know we'll be keeping all the
1360 if (h->dynindx != -1)
1364 eh->dyn_relocs = NULL;
1369 /* Finally, allocate space. */
1370 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1372 asection *sreloc = elf_section_data (p->sec)->sreloc;
1373 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
1379 /* Find any dynamic relocs that apply to read-only sections. */
1382 readonly_dynrelocs (h, inf)
1383 struct elf_link_hash_entry *h;
1386 struct elf_s390_link_hash_entry *eh;
1387 struct elf_s390_dyn_relocs *p;
1389 if (h->root.type == bfd_link_hash_warning)
1390 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1392 eh = (struct elf_s390_link_hash_entry *) h;
1393 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1395 asection *s = p->sec->output_section;
1397 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1399 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1401 info->flags |= DF_TEXTREL;
1403 /* Not an error, just cut short the traversal. */
1410 /* Set the sizes of the dynamic sections. */
1413 elf_s390_size_dynamic_sections (output_bfd, info)
1414 bfd *output_bfd ATTRIBUTE_UNUSED;
1415 struct bfd_link_info *info;
1417 struct elf_s390_link_hash_table *htab;
1423 htab = elf_s390_hash_table (info);
1424 dynobj = htab->elf.dynobj;
1428 if (htab->elf.dynamic_sections_created)
1430 /* Set the contents of the .interp section to the interpreter. */
1433 s = bfd_get_section_by_name (dynobj, ".interp");
1436 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1437 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1441 /* Set up .got offsets for local syms, and space for local dynamic
1443 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1445 bfd_signed_vma *local_got;
1446 bfd_signed_vma *end_local_got;
1447 bfd_size_type locsymcount;
1448 Elf_Internal_Shdr *symtab_hdr;
1451 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1454 for (s = ibfd->sections; s != NULL; s = s->next)
1456 struct elf_s390_dyn_relocs *p;
1458 for (p = *((struct elf_s390_dyn_relocs **)
1459 &elf_section_data (s)->local_dynrel);
1463 if (!bfd_is_abs_section (p->sec)
1464 && bfd_is_abs_section (p->sec->output_section))
1466 /* Input section has been discarded, either because
1467 it is a copy of a linkonce section or due to
1468 linker script /DISCARD/, so we'll be discarding
1471 else if (p->count != 0)
1473 srela = elf_section_data (p->sec)->sreloc;
1474 srela->_raw_size += p->count * sizeof (Elf32_External_Rela);
1475 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1476 info->flags |= DF_TEXTREL;
1481 local_got = elf_local_got_refcounts (ibfd);
1485 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1486 locsymcount = symtab_hdr->sh_info;
1487 end_local_got = local_got + locsymcount;
1489 srela = htab->srelgot;
1490 for (; local_got < end_local_got; ++local_got)
1494 *local_got = s->_raw_size;
1495 s->_raw_size += GOT_ENTRY_SIZE;
1497 srela->_raw_size += sizeof (Elf32_External_Rela);
1500 *local_got = (bfd_vma) -1;
1504 /* Allocate global sym .plt and .got entries, and space for global
1505 sym dynamic relocs. */
1506 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1508 /* We now have determined the sizes of the various dynamic sections.
1509 Allocate memory for them. */
1511 for (s = dynobj->sections; s != NULL; s = s->next)
1513 if ((s->flags & SEC_LINKER_CREATED) == 0)
1518 || s == htab->sgotplt)
1520 /* Strip this section if we don't need it; see the
1523 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
1525 if (s->_raw_size != 0 && s != htab->srelplt)
1528 /* We use the reloc_count field as a counter if we need
1529 to copy relocs into the output file. */
1534 /* It's not one of our sections, so don't allocate space. */
1538 if (s->_raw_size == 0)
1540 /* If we don't need this section, strip it from the
1541 output file. This is to handle .rela.bss and
1542 .rela.plt. We must create it in
1543 create_dynamic_sections, because it must be created
1544 before the linker maps input sections to output
1545 sections. The linker does that before
1546 adjust_dynamic_symbol is called, and it is that
1547 function which decides whether anything needs to go
1548 into these sections. */
1550 _bfd_strip_section_from_output (info, s);
1554 /* Allocate memory for the section contents. We use bfd_zalloc
1555 here in case unused entries are not reclaimed before the
1556 section's contents are written out. This should not happen,
1557 but this way if it does, we get a R_390_NONE reloc instead
1559 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1560 if (s->contents == NULL)
1564 if (htab->elf.dynamic_sections_created)
1566 /* Add some entries to the .dynamic section. We fill in the
1567 values later, in elf_s390_finish_dynamic_sections, but we
1568 must add the entries now so that we get the correct size for
1569 the .dynamic section. The DT_DEBUG entry is filled in by the
1570 dynamic linker and used by the debugger. */
1571 #define add_dynamic_entry(TAG, VAL) \
1572 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1576 if (!add_dynamic_entry (DT_DEBUG, 0))
1580 if (htab->splt->_raw_size != 0)
1582 if (!add_dynamic_entry (DT_PLTGOT, 0)
1583 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1584 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1585 || !add_dynamic_entry (DT_JMPREL, 0))
1591 if (!add_dynamic_entry (DT_RELA, 0)
1592 || !add_dynamic_entry (DT_RELASZ, 0)
1593 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1596 /* If any dynamic relocs apply to a read-only section,
1597 then we need a DT_TEXTREL entry. */
1598 if ((info->flags & DF_TEXTREL) == 0)
1599 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1602 if ((info->flags & DF_TEXTREL) != 0)
1604 if (!add_dynamic_entry (DT_TEXTREL, 0))
1609 #undef add_dynamic_entry
1614 /* Relocate a 390 ELF section. */
1617 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
1618 contents, relocs, local_syms, local_sections)
1620 struct bfd_link_info *info;
1622 asection *input_section;
1624 Elf_Internal_Rela *relocs;
1625 Elf_Internal_Sym *local_syms;
1626 asection **local_sections;
1628 struct elf_s390_link_hash_table *htab;
1629 Elf_Internal_Shdr *symtab_hdr;
1630 struct elf_link_hash_entry **sym_hashes;
1631 bfd_vma *local_got_offsets;
1632 Elf_Internal_Rela *rel;
1633 Elf_Internal_Rela *relend;
1635 htab = elf_s390_hash_table (info);
1636 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1637 sym_hashes = elf_sym_hashes (input_bfd);
1638 local_got_offsets = elf_local_got_offsets (input_bfd);
1641 relend = relocs + input_section->reloc_count;
1642 for (; rel < relend; rel++)
1645 reloc_howto_type *howto;
1646 unsigned long r_symndx;
1647 struct elf_link_hash_entry *h;
1648 Elf_Internal_Sym *sym;
1652 boolean unresolved_reloc;
1653 bfd_reloc_status_type r;
1655 r_type = ELF32_R_TYPE (rel->r_info);
1656 if (r_type == (int) R_390_GNU_VTINHERIT
1657 || r_type == (int) R_390_GNU_VTENTRY)
1659 if (r_type < 0 || r_type >= (int) R_390_max)
1661 bfd_set_error (bfd_error_bad_value);
1664 howto = elf_howto_table + r_type;
1666 r_symndx = ELF32_R_SYM (rel->r_info);
1668 if (info->relocateable)
1670 /* This is a relocateable link. We don't have to change
1671 anything, unless the reloc is against a section symbol,
1672 in which case we have to adjust according to where the
1673 section symbol winds up in the output section. */
1674 if (r_symndx < symtab_hdr->sh_info)
1676 sym = local_syms + r_symndx;
1677 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1679 sec = local_sections[r_symndx];
1680 rel->r_addend += sec->output_offset + sym->st_value;
1687 /* This is a final link. */
1691 unresolved_reloc = false;
1692 if (r_symndx < symtab_hdr->sh_info)
1694 sym = local_syms + r_symndx;
1695 sec = local_sections[r_symndx];
1696 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1700 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1701 while (h->root.type == bfd_link_hash_indirect
1702 || h->root.type == bfd_link_hash_warning)
1703 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1705 if (h->root.type == bfd_link_hash_defined
1706 || h->root.type == bfd_link_hash_defweak)
1708 sec = h->root.u.def.section;
1709 if (sec->output_section == NULL)
1711 /* Set a flag that will be cleared later if we find a
1712 relocation value for this symbol. output_section
1713 is typically NULL for symbols satisfied by a shared
1715 unresolved_reloc = true;
1719 relocation = (h->root.u.def.value
1720 + sec->output_section->vma
1721 + sec->output_offset);
1723 else if (h->root.type == bfd_link_hash_undefweak)
1725 else if (info->shared
1726 && (!info->symbolic || info->allow_shlib_undefined)
1727 && !info->no_undefined
1728 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1732 if (! ((*info->callbacks->undefined_symbol)
1733 (info, h->root.root.string, input_bfd,
1734 input_section, rel->r_offset,
1735 (!info->shared || info->no_undefined
1736 || ELF_ST_VISIBILITY (h->other)))))
1748 /* Relocation is to the entry for this symbol in the global
1750 if (htab->sgot == NULL)
1757 off = h->got.offset;
1758 dyn = htab->elf.dynamic_sections_created;
1759 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
1763 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
1764 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1766 /* This is actually a static link, or it is a
1767 -Bsymbolic link and the symbol is defined
1768 locally, or the symbol was forced to be local
1769 because of a version file. We must initialize
1770 this entry in the global offset table. Since the
1771 offset must always be a multiple of 2, we use the
1772 least significant bit to record whether we have
1773 initialized it already.
1775 When doing a dynamic link, we create a .rel.got
1776 relocation entry to initialize the value. This
1777 is done in the finish_dynamic_symbol routine. */
1782 bfd_put_32 (output_bfd, relocation,
1783 htab->sgot->contents + off);
1788 unresolved_reloc = false;
1792 if (local_got_offsets == NULL)
1795 off = local_got_offsets[r_symndx];
1797 /* The offset must always be a multiple of 4. We use
1798 the least significant bit to record whether we have
1799 already generated the necessary reloc. */
1804 bfd_put_32 (output_bfd, relocation,
1805 htab->sgot->contents + off);
1810 Elf_Internal_Rela outrel;
1811 Elf32_External_Rela *loc;
1813 srelgot = htab->srelgot;
1814 if (srelgot == NULL)
1817 outrel.r_offset = (htab->sgot->output_section->vma
1818 + htab->sgot->output_offset
1820 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
1821 outrel.r_addend = relocation;
1822 loc = (Elf32_External_Rela *) srelgot->contents;
1823 loc += srelgot->reloc_count++;
1824 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1827 local_got_offsets[r_symndx] |= 1;
1831 if (off >= (bfd_vma) -2)
1834 relocation = htab->sgot->output_offset + off;
1837 * For @GOTENT the relocation is against the offset between
1838 * the instruction and the symbols entry in the GOT and not
1839 * between the start of the GOT and the symbols entry. We
1840 * add the vma of the GOT to get the correct value.
1842 if (r_type == R_390_GOTENT)
1843 relocation += htab->sgot->output_section->vma;
1848 /* Relocation is relative to the start of the global offset
1851 /* Note that sgot->output_offset is not involved in this
1852 calculation. We always want the start of .got. If we
1853 defined _GLOBAL_OFFSET_TABLE in a different way, as is
1854 permitted by the ABI, we might have to change this
1856 relocation -= htab->sgot->output_section->vma;
1860 case R_390_GOTPCDBL:
1861 /* Use global offset table as symbol value. */
1862 relocation = htab->sgot->output_section->vma;
1863 unresolved_reloc = false;
1866 case R_390_PLT16DBL:
1867 case R_390_PLT32DBL:
1869 /* Relocation is to the entry for this symbol in the
1870 procedure linkage table. */
1872 /* Resolve a PLT32 reloc against a local symbol directly,
1873 without using the procedure linkage table. */
1877 if (h->plt.offset == (bfd_vma) -1
1878 || htab->splt == NULL)
1880 /* We didn't make a PLT entry for this symbol. This
1881 happens when statically linking PIC code, or when
1882 using -Bsymbolic. */
1886 relocation = (htab->splt->output_section->vma
1887 + htab->splt->output_offset
1889 unresolved_reloc = false;
1899 /* r_symndx will be zero only for relocs against symbols
1900 from removed linkonce sections, or sections discarded by
1903 || (input_section->flags & SEC_ALLOC) == 0)
1907 && ((r_type != R_390_PC16
1908 && r_type != R_390_PC16DBL
1909 && r_type != R_390_PC32DBL
1910 && r_type != R_390_PC32)
1913 && (! info->symbolic
1914 || (h->elf_link_hash_flags
1915 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1919 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1920 && (((h->elf_link_hash_flags
1921 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1922 && (h->elf_link_hash_flags
1923 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1924 || h->root.type == bfd_link_hash_undefweak
1925 || h->root.type == bfd_link_hash_undefined)))
1927 Elf_Internal_Rela outrel;
1928 boolean skip, relocate;
1930 Elf32_External_Rela *loc;
1932 /* When generating a shared object, these relocations
1933 are copied into the output file to be resolved at run
1940 _bfd_elf_section_offset (output_bfd, info, input_section,
1942 if (outrel.r_offset == (bfd_vma) -1)
1944 else if (outrel.r_offset == (bfd_vma) -2)
1945 skip = true, relocate = true;
1946 outrel.r_offset += (input_section->output_section->vma
1947 + input_section->output_offset);
1950 memset (&outrel, 0, sizeof outrel);
1953 && (r_type == R_390_PC16
1954 || r_type == R_390_PC16DBL
1955 || r_type == R_390_PC32DBL
1956 || r_type == R_390_PC32
1959 || (h->elf_link_hash_flags
1960 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1962 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1963 outrel.r_addend = rel->r_addend;
1967 /* This symbol is local, or marked to become local. */
1969 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
1970 outrel.r_addend = relocation + rel->r_addend;
1973 sreloc = elf_section_data (input_section)->sreloc;
1977 loc = (Elf32_External_Rela *) sreloc->contents;
1978 loc += sreloc->reloc_count++;
1979 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1981 /* If this reloc is against an external symbol, we do
1982 not want to fiddle with the addend. Otherwise, we
1983 need to include the symbol value so that it becomes
1984 an addend for the dynamic reloc. */
1994 if (unresolved_reloc
1996 && (input_section->flags & SEC_DEBUGGING) != 0
1997 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
1998 (*_bfd_error_handler)
1999 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2000 bfd_archive_filename (input_bfd),
2001 bfd_get_section_name (input_bfd, input_section),
2002 (long) rel->r_offset,
2003 h->root.root.string);
2005 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2006 contents, rel->r_offset,
2007 relocation, rel->r_addend);
2009 if (r != bfd_reloc_ok)
2014 name = h->root.root.string;
2017 name = bfd_elf_string_from_elf_section (input_bfd,
2018 symtab_hdr->sh_link,
2023 name = bfd_section_name (input_bfd, sec);
2026 if (r == bfd_reloc_overflow)
2029 if (! ((*info->callbacks->reloc_overflow)
2030 (info, name, howto->name, (bfd_vma) 0,
2031 input_bfd, input_section, rel->r_offset)))
2036 (*_bfd_error_handler)
2037 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2038 bfd_archive_filename (input_bfd),
2039 bfd_get_section_name (input_bfd, input_section),
2040 (long) rel->r_offset, name, (int) r);
2049 /* Finish up dynamic symbol handling. We set the contents of various
2050 dynamic sections here. */
2053 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
2055 struct bfd_link_info *info;
2056 struct elf_link_hash_entry *h;
2057 Elf_Internal_Sym *sym;
2059 struct elf_s390_link_hash_table *htab;
2061 htab = elf_s390_hash_table (info);
2063 if (h->plt.offset != (bfd_vma) -1)
2067 Elf_Internal_Rela rela;
2068 Elf32_External_Rela *loc;
2069 bfd_vma relative_offset;
2071 /* This symbol has an entry in the procedure linkage table. Set
2074 if (h->dynindx == -1
2075 || htab->splt == NULL
2076 || htab->sgotplt == NULL
2077 || htab->srelplt == NULL)
2081 Current offset - size first entry / entry size. */
2082 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
2084 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2086 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
2088 /* S390 uses halfwords for relative branch calc! */
2089 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
2090 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
2091 /* If offset is > 32768, branch to a previous branch
2092 390 can only handle +-64 K jumps. */
2093 if ( -32768 > (int) relative_offset )
2095 -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
2097 /* Fill in the entry in the procedure linkage table. */
2100 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
2101 htab->splt->contents + h->plt.offset);
2102 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
2103 htab->splt->contents + h->plt.offset + 4);
2104 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
2105 htab->splt->contents + h->plt.offset + 8);
2106 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
2107 htab->splt->contents + h->plt.offset + 12);
2108 bfd_put_32 (output_bfd, (bfd_vma) PLT_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,
2113 (htab->sgotplt->output_section->vma
2114 + htab->sgotplt->output_offset
2116 htab->splt->contents + h->plt.offset + 24);
2118 else if (got_offset < 4096)
2120 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
2121 htab->splt->contents + h->plt.offset);
2122 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
2123 htab->splt->contents + h->plt.offset + 4);
2124 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
2125 htab->splt->contents + h->plt.offset + 8);
2126 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
2127 htab->splt->contents + h->plt.offset + 12);
2128 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
2129 htab->splt->contents + h->plt.offset + 16);
2130 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2131 htab->splt->contents + h->plt.offset + 20);
2132 bfd_put_32 (output_bfd, (bfd_vma) 0,
2133 htab->splt->contents + h->plt.offset + 24);
2135 else if (got_offset < 32768)
2137 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
2138 htab->splt->contents + h->plt.offset);
2139 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
2140 htab->splt->contents + h->plt.offset + 4);
2141 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
2142 htab->splt->contents + h->plt.offset + 8);
2143 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
2144 htab->splt->contents + h->plt.offset + 12);
2145 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
2146 htab->splt->contents + h->plt.offset + 16);
2147 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2148 htab->splt->contents + h->plt.offset + 20);
2149 bfd_put_32 (output_bfd, (bfd_vma) 0,
2150 htab->splt->contents + h->plt.offset + 24);
2154 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
2155 htab->splt->contents + h->plt.offset);
2156 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
2157 htab->splt->contents + h->plt.offset + 4);
2158 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
2159 htab->splt->contents + h->plt.offset + 8);
2160 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
2161 htab->splt->contents + h->plt.offset + 12);
2162 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
2163 htab->splt->contents + h->plt.offset + 16);
2164 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2165 htab->splt->contents + h->plt.offset + 20);
2166 bfd_put_32 (output_bfd, got_offset,
2167 htab->splt->contents + h->plt.offset + 24);
2169 /* Insert offset into reloc. table here. */
2170 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
2171 htab->splt->contents + h->plt.offset + 28);
2173 /* Fill in the entry in the global offset table.
2174 Points to instruction after GOT offset. */
2175 bfd_put_32 (output_bfd,
2176 (htab->splt->output_section->vma
2177 + htab->splt->output_offset
2180 htab->sgotplt->contents + got_offset);
2182 /* Fill in the entry in the .rela.plt section. */
2183 rela.r_offset = (htab->sgotplt->output_section->vma
2184 + htab->sgotplt->output_offset
2186 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
2188 loc = (Elf32_External_Rela *) htab->srelplt->contents + plt_index;
2189 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2191 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2193 /* Mark the symbol as undefined, rather than as defined in
2194 the .plt section. Leave the value alone. This is a clue
2195 for the dynamic linker, to make function pointer
2196 comparisons work between an application and shared
2198 sym->st_shndx = SHN_UNDEF;
2202 if (h->got.offset != (bfd_vma) -1)
2204 Elf_Internal_Rela rela;
2205 Elf32_External_Rela *loc;
2207 /* This symbol has an entry in the global offset table. Set it
2210 if (htab->sgot == NULL || htab->srelgot == NULL)
2213 rela.r_offset = (htab->sgot->output_section->vma
2214 + htab->sgot->output_offset
2215 + (h->got.offset &~ (bfd_vma) 1));
2217 /* If this is a static link, or it is a -Bsymbolic link and the
2218 symbol is defined locally or was forced to be local because
2219 of a version file, we just want to emit a RELATIVE reloc.
2220 The entry in the global offset table will already have been
2221 initialized in the relocate_section function. */
2225 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2226 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2228 BFD_ASSERT((h->got.offset & 1) != 0);
2229 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2230 rela.r_addend = (h->root.u.def.value
2231 + h->root.u.def.section->output_section->vma
2232 + h->root.u.def.section->output_offset);
2236 BFD_ASSERT((h->got.offset & 1) == 0);
2237 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
2238 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
2242 loc = (Elf32_External_Rela *) htab->srelgot->contents;
2243 loc += htab->srelgot->reloc_count++;
2244 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2247 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2249 Elf_Internal_Rela rela;
2250 Elf32_External_Rela *loc;
2252 /* This symbols needs a copy reloc. Set it up. */
2254 if (h->dynindx == -1
2255 || (h->root.type != bfd_link_hash_defined
2256 && h->root.type != bfd_link_hash_defweak)
2257 || htab->srelbss == NULL)
2260 rela.r_offset = (h->root.u.def.value
2261 + h->root.u.def.section->output_section->vma
2262 + h->root.u.def.section->output_offset);
2263 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
2265 loc = (Elf32_External_Rela *) htab->srelbss->contents;
2266 loc += htab->srelbss->reloc_count++;
2267 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2270 /* Mark some specially defined symbols as absolute. */
2271 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2272 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2273 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2274 sym->st_shndx = SHN_ABS;
2279 /* Used to decide how to sort relocs in an optimal manner for the
2280 dynamic linker, before writing them out. */
2282 static enum elf_reloc_type_class
2283 elf_s390_reloc_type_class (rela)
2284 const Elf_Internal_Rela *rela;
2286 switch ((int) ELF32_R_TYPE (rela->r_info))
2288 case R_390_RELATIVE:
2289 return reloc_class_relative;
2290 case R_390_JMP_SLOT:
2291 return reloc_class_plt;
2293 return reloc_class_copy;
2295 return reloc_class_normal;
2299 /* Finish up the dynamic sections. */
2302 elf_s390_finish_dynamic_sections (output_bfd, info)
2304 struct bfd_link_info *info;
2306 struct elf_s390_link_hash_table *htab;
2310 htab = elf_s390_hash_table (info);
2311 dynobj = htab->elf.dynobj;
2312 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2314 if (htab->elf.dynamic_sections_created)
2316 Elf32_External_Dyn *dyncon, *dynconend;
2318 if (sdyn == NULL || htab->sgot == NULL)
2321 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2322 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2323 for (; dyncon < dynconend; dyncon++)
2325 Elf_Internal_Dyn dyn;
2328 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2336 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
2340 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
2344 s = htab->srelplt->output_section;
2345 if (s->_cooked_size != 0)
2346 dyn.d_un.d_val = s->_cooked_size;
2348 dyn.d_un.d_val = s->_raw_size;
2352 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2355 /* Fill in the special first entry in the procedure linkage table. */
2356 if (htab->splt && htab->splt->_raw_size > 0)
2358 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
2361 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
2362 htab->splt->contents );
2363 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
2364 htab->splt->contents +4 );
2365 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
2366 htab->splt->contents +8 );
2367 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
2368 htab->splt->contents +12 );
2369 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
2370 htab->splt->contents +16 );
2374 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
2375 htab->splt->contents );
2376 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
2377 htab->splt->contents +4 );
2378 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
2379 htab->splt->contents +8 );
2380 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
2381 htab->splt->contents +12 );
2382 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
2383 htab->splt->contents +16 );
2384 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
2385 htab->splt->contents +20 );
2386 bfd_put_32 (output_bfd,
2387 htab->sgotplt->output_section->vma
2388 + htab->sgotplt->output_offset,
2389 htab->splt->contents + 24);
2391 elf_section_data (htab->splt->output_section)
2392 ->this_hdr.sh_entsize = 4;
2399 /* Fill in the first three entries in the global offset table. */
2400 if (htab->sgotplt->_raw_size > 0)
2402 bfd_put_32 (output_bfd,
2403 (sdyn == NULL ? (bfd_vma) 0
2404 : sdyn->output_section->vma + sdyn->output_offset),
2405 htab->sgotplt->contents);
2406 /* One entry for shared object struct ptr. */
2407 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
2408 /* One entry for _dl_runtime_resolve. */
2409 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
2412 elf_section_data (htab->sgotplt->output_section)
2413 ->this_hdr.sh_entsize = 4;
2419 elf_s390_object_p (abfd)
2422 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
2426 elf_s390_grok_prstatus (abfd, note)
2428 Elf_Internal_Note * note;
2431 unsigned int raw_size;
2433 switch (note->descsz)
2438 case 224: /* S/390 Linux. */
2440 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2443 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
2451 /* Make a ".reg/999" section. */
2452 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2453 raw_size, note->descpos + offset);
2456 #define TARGET_BIG_SYM bfd_elf32_s390_vec
2457 #define TARGET_BIG_NAME "elf32-s390"
2458 #define ELF_ARCH bfd_arch_s390
2459 #define ELF_MACHINE_CODE EM_S390
2460 #define ELF_MACHINE_ALT1 EM_S390_OLD
2461 #define ELF_MAXPAGESIZE 0x1000
2463 #define elf_backend_can_gc_sections 1
2464 #define elf_backend_can_refcount 1
2465 #define elf_backend_want_got_plt 1
2466 #define elf_backend_plt_readonly 1
2467 #define elf_backend_want_plt_sym 0
2468 #define elf_backend_got_header_size 12
2469 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
2471 #define elf_info_to_howto elf_s390_info_to_howto
2473 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
2474 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
2475 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
2477 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
2478 #define elf_backend_check_relocs elf_s390_check_relocs
2479 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
2480 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
2481 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
2482 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
2483 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
2484 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
2485 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
2486 #define elf_backend_relocate_section elf_s390_relocate_section
2487 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
2488 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
2489 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
2491 #define elf_backend_object_p elf_s390_object_p
2493 #include "elf32-target.h"