1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001 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 *));
73 #define USE_RELA 1 /* We want RELA relocations, not REL. */
77 /* The relocation "howto" table. */
79 static reloc_howto_type elf_howto_table[] =
81 HOWTO (R_390_NONE, /* type */
83 0, /* size (0 = byte, 1 = short, 2 = long) */
85 false, /* pc_relative */
87 complain_overflow_dont, /* complain_on_overflow */
88 bfd_elf_generic_reloc, /* special_function */
89 "R_390_NONE", /* name */
90 false, /* partial_inplace */
93 false), /* pcrel_offset */
95 HOWTO(R_390_8, 0, 0, 8, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_8", false, 0,0x000000ff, false),
96 HOWTO(R_390_12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_12", false, 0,0x00000fff, false),
97 HOWTO(R_390_16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_16", false, 0,0x0000ffff, false),
98 HOWTO(R_390_32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_32", false, 0,0xffffffff, false),
99 HOWTO(R_390_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC32", false, 0,0xffffffff, true),
100 HOWTO(R_390_GOT12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_GOT12", false, 0,0x00000fff, false),
101 HOWTO(R_390_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT32", false, 0,0xffffffff, false),
102 HOWTO(R_390_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32", false, 0,0xffffffff, true),
103 HOWTO(R_390_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_COPY", false, 0,0xffffffff, false),
104 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),
105 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),
106 HOWTO(R_390_RELATIVE, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_RELATIVE",false, 0,0xffffffff, false),
107 HOWTO(R_390_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF", false, 0,0xffffffff, false),
108 HOWTO(R_390_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,0xffffffff, true),
109 HOWTO(R_390_GOT16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT16", false, 0,0x0000ffff, false),
110 HOWTO(R_390_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16", false, 0,0x0000ffff, true),
111 HOWTO(R_390_PC16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16DBL", false, 0,0x0000ffff, true),
112 HOWTO(R_390_PLT16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true),
115 /* GNU extension to record C++ vtable hierarchy. */
116 static reloc_howto_type elf32_s390_vtinherit_howto =
117 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false);
118 static reloc_howto_type elf32_s390_vtentry_howto =
119 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);
121 static reloc_howto_type *
122 elf_s390_reloc_type_lookup (abfd, code)
123 bfd *abfd ATTRIBUTE_UNUSED;
124 bfd_reloc_code_real_type code;
129 return &elf_howto_table[(int) R_390_NONE];
131 return &elf_howto_table[(int) R_390_8];
132 case BFD_RELOC_390_12:
133 return &elf_howto_table[(int) R_390_12];
135 return &elf_howto_table[(int) R_390_16];
137 return &elf_howto_table[(int) R_390_32];
139 return &elf_howto_table[(int) R_390_32];
140 case BFD_RELOC_32_PCREL:
141 return &elf_howto_table[(int) R_390_PC32];
142 case BFD_RELOC_390_GOT12:
143 return &elf_howto_table[(int) R_390_GOT12];
144 case BFD_RELOC_32_GOT_PCREL:
145 return &elf_howto_table[(int) R_390_GOT32];
146 case BFD_RELOC_390_PLT32:
147 return &elf_howto_table[(int) R_390_PLT32];
148 case BFD_RELOC_390_COPY:
149 return &elf_howto_table[(int) R_390_COPY];
150 case BFD_RELOC_390_GLOB_DAT:
151 return &elf_howto_table[(int) R_390_GLOB_DAT];
152 case BFD_RELOC_390_JMP_SLOT:
153 return &elf_howto_table[(int) R_390_JMP_SLOT];
154 case BFD_RELOC_390_RELATIVE:
155 return &elf_howto_table[(int) R_390_RELATIVE];
156 case BFD_RELOC_32_GOTOFF:
157 return &elf_howto_table[(int) R_390_GOTOFF];
158 case BFD_RELOC_390_GOTPC:
159 return &elf_howto_table[(int) R_390_GOTPC];
160 case BFD_RELOC_390_GOT16:
161 return &elf_howto_table[(int) R_390_GOT16];
162 case BFD_RELOC_16_PCREL:
163 return &elf_howto_table[(int) R_390_PC16];
164 case BFD_RELOC_390_PC16DBL:
165 return &elf_howto_table[(int) R_390_PC16DBL];
166 case BFD_RELOC_390_PLT16DBL:
167 return &elf_howto_table[(int) R_390_PLT16DBL];
168 case BFD_RELOC_VTABLE_INHERIT:
169 return &elf32_s390_vtinherit_howto;
170 case BFD_RELOC_VTABLE_ENTRY:
171 return &elf32_s390_vtentry_howto;
178 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
179 and elf32-s390.c has its own copy. */
182 elf_s390_info_to_howto (abfd, cache_ptr, dst)
183 bfd *abfd ATTRIBUTE_UNUSED;
185 Elf_Internal_Rela *dst;
187 switch (ELF32_R_TYPE(dst->r_info))
189 case R_390_GNU_VTINHERIT:
190 cache_ptr->howto = &elf32_s390_vtinherit_howto;
193 case R_390_GNU_VTENTRY:
194 cache_ptr->howto = &elf32_s390_vtentry_howto;
198 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
199 cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
204 elf_s390_is_local_label_name (abfd, name)
208 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
211 return _bfd_elf_is_local_label_name (abfd, name);
214 /* Functions for the 390 ELF linker. */
216 /* The name of the dynamic interpreter. This is put in the .interp
219 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
221 /* The size in bytes of the first entry in the procedure linkage table. */
222 #define PLT_FIRST_ENTRY_SIZE 32
223 /* The size in bytes of an entry in the procedure linkage table. */
224 #define PLT_ENTRY_SIZE 32
226 #define GOT_ENTRY_SIZE 4
228 /* The first three entries in a procedure linkage table are reserved,
229 and the initial contents are unimportant (we zero them out).
230 Subsequent entries look like this. See the SVR4 ABI 386
231 supplement to see how this works. */
233 /* For the s390, simple addr offset can only be 0 - 4096.
234 To use the full 2 GB address space, several instructions
235 are needed to load an address in a register and execute
236 a branch( or just saving the address)
238 Furthermore, only r 0 and 1 are free to use!!! */
240 /* The first 3 words in the GOT are then reserved.
241 Word 0 is the address of the dynamic table.
242 Word 1 is a pointer to a structure describing the object
243 Word 2 is used to point to the loader entry address.
245 The code for position independand PLT entries looks like this:
247 r12 holds addr of the current GOT at entry to the PLT
249 The GOT holds the address in the PLT to be executed.
250 The loader then gets:
251 24(15) = Pointer to the structure describing the object.
252 28(15) = Offset in symbol table
254 The loader must then find the module where the function is
255 and insert the address in the GOT.
257 Note: 390 can only address +- 64 K relative.
258 We check if offset > 65536, then make a relative branch -64xxx
259 back to a previous defined branch
261 PLT1: BASR 1,0 # 2 bytes
262 L 1,22(1) # 4 bytes Load offset in GOT in r 1
263 L 1,(1,12) # 4 bytes Load address from GOT in r1
264 BCR 15,1 # 2 bytes Jump to address
265 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
266 L 1,14(1) # 4 bytes Load offset in symol table in r1
267 BRC 15,-x # 4 bytes Jump to start of PLT
268 .word 0 # 2 bytes filler
269 .long ? # 4 bytes offset in GOT
270 .long ? # 4 bytes offset into symbol table
272 This was the general case. There are two additional, optimizes PLT
273 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
274 First the one for GOT offsets < 4096:
276 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
277 BCR 15,1 # 2 bytes Jump to address
278 .word 0,0,0 # 6 bytes filler
279 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
280 L 1,14(1) # 4 bytes Load offset in symbol table in r1
281 BRC 15,-x # 4 bytes Jump to start of PLT
282 .word 0,0,0 # 6 bytes filler
283 .long ? # 4 bytes offset into symbol table
285 Second the one for GOT offsets < 32768:
287 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
288 L 1,(1,12) # 4 bytes Load address from GOT to r1
289 BCR 15,1 # 2 bytes Jump to address
290 .word 0 # 2 bytes filler
291 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
292 L 1,14(1) # 4 bytes Load offset in symbol table in r1
293 BRC 15,-x # 4 bytes Jump to start of PLT
294 .word 0,0,0 # 6 bytes filler
295 .long ? # 4 bytes offset into symbol table
297 Total = 32 bytes per PLT entry
299 The code for static build PLT entries looks like this:
301 PLT1: BASR 1,0 # 2 bytes
302 L 1,22(1) # 4 bytes Load address of GOT entry
303 L 1,0(0,1) # 4 bytes Load address from GOT in r1
304 BCR 15,1 # 2 bytes Jump to address
305 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
306 L 1,14(1) # 4 bytes Load offset in symbol table in r1
307 BRC 15,-x # 4 bytes Jump to start of PLT
308 .word 0 # 2 bytes filler
309 .long ? # 4 bytes address of GOT entry
310 .long ? # 4 bytes offset into symbol table */
312 #define PLT_PIC_ENTRY_WORD0 0x0d105810
313 #define PLT_PIC_ENTRY_WORD1 0x10165811
314 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
315 #define PLT_PIC_ENTRY_WORD3 0x0d105810
316 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
318 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
319 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
320 #define PLT_PIC12_ENTRY_WORD2 0x00000000
321 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
322 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
324 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
325 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
326 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
327 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
328 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
330 #define PLT_ENTRY_WORD0 0x0d105810
331 #define PLT_ENTRY_WORD1 0x10165810
332 #define PLT_ENTRY_WORD2 0x100007f1
333 #define PLT_ENTRY_WORD3 0x0d105810
334 #define PLT_ENTRY_WORD4 0x100ea7f4
336 /* The first PLT entry pushes the offset into the symbol table
337 from R1 onto the stack at 8(15) and the loader object info
338 at 12(15), loads the loader address in R1 and jumps to it. */
340 /* The first entry in the PLT for PIC code:
343 ST 1,28(15) # R1 has offset into symbol table
344 L 1,4(12) # Get loader ino(object struct address)
345 ST 1,24(15) # Store address
346 L 1,8(12) # Entry address of loader in R1
347 BR 1 # Jump to loader
349 The first entry in the PLT for static code:
352 ST 1,28(15) # R1 has offset into symbol table
354 L 1,18(0,1) # Get address of GOT
355 MVC 24(4,15),4(1) # Move loader ino to stack
356 L 1,8(1) # Get address of loader
357 BR 1 # Jump to loader
359 .long got # address of GOT */
361 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
362 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
363 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
364 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
365 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
367 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
368 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
369 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
370 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
371 #define PLT_FIRST_ENTRY_WORD4 0x58101008
372 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
374 /* The s390 linker needs to keep track of the number of relocs that it
375 decides to copy as dynamic relocs in check_relocs for each symbol.
376 This is so that it can later discard them if they are found to be
377 unnecessary. We store the information in a field extending the
378 regular ELF linker hash table. */
380 struct elf_s390_dyn_relocs
382 struct elf_s390_dyn_relocs *next;
384 /* The input section of the reloc. */
387 /* Total number of relocs copied for the input section. */
390 /* Number of pc-relative relocs copied for the input section. */
391 bfd_size_type pc_count;
394 /* s390 ELF linker hash entry. */
396 struct elf_s390_link_hash_entry
398 struct elf_link_hash_entry elf;
400 /* Track dynamic relocs copied for this symbol. */
401 struct elf_s390_dyn_relocs *dyn_relocs;
404 /* s390 ELF linker hash table. */
406 struct elf_s390_link_hash_table
408 struct elf_link_hash_table elf;
410 /* Short-cuts to get to dynamic linker sections. */
419 /* Small local sym to section mapping cache. */
420 struct sym_sec_cache sym_sec;
423 /* Get the s390 ELF linker hash table from a link_info structure. */
425 #define elf_s390_hash_table(p) \
426 ((struct elf_s390_link_hash_table *) ((p)->hash))
428 /* Create an entry in an s390 ELF linker hash table. */
430 static struct bfd_hash_entry *
431 link_hash_newfunc (entry, table, string)
432 struct bfd_hash_entry *entry;
433 struct bfd_hash_table *table;
436 /* Allocate the structure if it has not already been allocated by a
440 entry = bfd_hash_allocate (table,
441 sizeof (struct elf_s390_link_hash_entry));
446 /* Call the allocation method of the superclass. */
447 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
450 struct elf_s390_link_hash_entry *eh;
452 eh = (struct elf_s390_link_hash_entry *) entry;
453 eh->dyn_relocs = NULL;
459 /* Create an s390 ELF linker hash table. */
461 static struct bfd_link_hash_table *
462 elf_s390_link_hash_table_create (abfd)
465 struct elf_s390_link_hash_table *ret;
466 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
468 ret = (struct elf_s390_link_hash_table *) bfd_alloc (abfd, amt);
472 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
474 bfd_release (abfd, ret);
485 ret->sym_sec.abfd = NULL;
487 return &ret->elf.root;
490 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
491 shortcuts to them in our hash table. */
494 create_got_section (dynobj, info)
496 struct bfd_link_info *info;
498 struct elf_s390_link_hash_table *htab;
500 if (! _bfd_elf_create_got_section (dynobj, info))
503 htab = elf_s390_hash_table (info);
504 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
505 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
506 if (!htab->sgot || !htab->sgotplt)
509 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
510 if (htab->srelgot == NULL
511 || ! bfd_set_section_flags (dynobj, htab->srelgot,
512 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
513 | SEC_IN_MEMORY | SEC_LINKER_CREATED
515 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
520 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
521 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
525 elf_s390_create_dynamic_sections (dynobj, info)
527 struct bfd_link_info *info;
529 struct elf_s390_link_hash_table *htab;
531 htab = elf_s390_hash_table (info);
532 if (!htab->sgot && !create_got_section (dynobj, info))
535 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
538 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
539 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
540 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
542 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
544 if (!htab->splt || !htab->srelplt || !htab->sdynbss
545 || (!info->shared && !htab->srelbss))
551 /* Copy the extra info we tack onto an elf_link_hash_entry. */
554 elf_s390_copy_indirect_symbol (dir, ind)
555 struct elf_link_hash_entry *dir, *ind;
557 struct elf_s390_link_hash_entry *edir, *eind;
559 edir = (struct elf_s390_link_hash_entry *) dir;
560 eind = (struct elf_s390_link_hash_entry *) ind;
562 if (eind->dyn_relocs != NULL)
564 if (edir->dyn_relocs != NULL)
566 struct elf_s390_dyn_relocs **pp;
567 struct elf_s390_dyn_relocs *p;
569 if (ind->root.type == bfd_link_hash_indirect)
572 /* Add reloc counts against the weak sym to the strong sym
573 list. Merge any entries against the same section. */
574 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
576 struct elf_s390_dyn_relocs *q;
578 for (q = edir->dyn_relocs; q != NULL; q = q->next)
579 if (q->sec == p->sec)
581 q->pc_count += p->pc_count;
582 q->count += p->count;
589 *pp = edir->dyn_relocs;
592 edir->dyn_relocs = eind->dyn_relocs;
593 eind->dyn_relocs = NULL;
596 _bfd_elf_link_hash_copy_indirect (dir, ind);
599 /* Look through the relocs for a section during the first phase, and
600 allocate space in the global offset table or procedure linkage
604 elf_s390_check_relocs (abfd, info, sec, relocs)
606 struct bfd_link_info *info;
608 const Elf_Internal_Rela *relocs;
610 struct elf_s390_link_hash_table *htab;
611 Elf_Internal_Shdr *symtab_hdr;
612 struct elf_link_hash_entry **sym_hashes;
613 const Elf_Internal_Rela *rel;
614 const Elf_Internal_Rela *rel_end;
617 if (info->relocateable)
620 htab = elf_s390_hash_table (info);
621 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
622 sym_hashes = elf_sym_hashes (abfd);
626 rel_end = relocs + sec->reloc_count;
627 for (rel = relocs; rel < rel_end; rel++)
629 unsigned long r_symndx;
630 struct elf_link_hash_entry *h;
632 r_symndx = ELF32_R_SYM (rel->r_info);
634 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
636 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
637 bfd_archive_filename (abfd),
642 if (r_symndx < symtab_hdr->sh_info)
645 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
647 switch (ELF32_R_TYPE (rel->r_info))
652 /* This symbol requires a global offset table entry. */
655 h->got.refcount += 1;
659 bfd_signed_vma *local_got_refcounts;
661 /* This is a global offset table entry for a local symbol. */
662 local_got_refcounts = elf_local_got_refcounts (abfd);
663 if (local_got_refcounts == NULL)
667 size = symtab_hdr->sh_info;
668 size *= sizeof (bfd_signed_vma);
669 local_got_refcounts = ((bfd_signed_vma *)
670 bfd_zalloc (abfd, size));
671 if (local_got_refcounts == NULL)
673 elf_local_got_refcounts (abfd) = local_got_refcounts;
675 local_got_refcounts[r_symndx] += 1;
681 if (htab->sgot == NULL)
683 if (htab->elf.dynobj == NULL)
684 htab->elf.dynobj = abfd;
685 if (!create_got_section (htab->elf.dynobj, info))
692 /* This symbol requires a procedure linkage table entry. We
693 actually build the entry in adjust_dynamic_symbol,
694 because this might be a case of linking PIC code which is
695 never referenced by a dynamic object, in which case we
696 don't need to generate a procedure linkage table entry
699 /* If this is a local symbol, we resolve it directly without
700 creating a procedure linkage table entry. */
704 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
705 h->plt.refcount += 1;
714 if (h != NULL && !info->shared)
716 /* If this reloc is in a read-only section, we might
717 need a copy reloc. We can't check reliably at this
718 stage whether the section is read-only, as input
719 sections have not yet been mapped to output sections.
720 Tentatively set the flag for now, and correct in
721 adjust_dynamic_symbol. */
722 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
724 /* We may need a .plt entry if the function this reloc
725 refers to is in a shared lib. */
726 h->plt.refcount += 1;
729 /* If we are creating a shared library, and this is a reloc
730 against a global symbol, or a non PC relative reloc
731 against a local symbol, then we need to copy the reloc
732 into the shared library. However, if we are linking with
733 -Bsymbolic, we do not need to copy a reloc against a
734 global symbol which is defined in an object we are
735 including in the link (i.e., DEF_REGULAR is set). At
736 this point we have not seen all the input files, so it is
737 possible that DEF_REGULAR is not set now but will be set
738 later (it is never cleared). In case of a weak definition,
739 DEF_REGULAR may be cleared later by a strong definition in
740 a shared library. We account for that possibility below by
741 storing information in the relocs_copied field of the hash
742 table entry. A similar situation occurs when creating
743 shared libraries and symbol visibility changes render the
746 If on the other hand, we are creating an executable, we
747 may need to keep relocations for symbols satisfied by a
748 dynamic library if we manage to avoid copy relocs for the
751 && (sec->flags & SEC_ALLOC) != 0
752 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
753 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
754 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
757 || h->root.type == bfd_link_hash_defweak
758 || (h->elf_link_hash_flags
759 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
761 && (sec->flags & SEC_ALLOC) != 0
763 && (h->root.type == bfd_link_hash_defweak
764 || (h->elf_link_hash_flags
765 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
767 struct elf_s390_dyn_relocs *p;
768 struct elf_s390_dyn_relocs **head;
770 /* We must copy these reloc types into the output file.
771 Create a reloc section in dynobj and make room for
778 name = (bfd_elf_string_from_elf_section
780 elf_elfheader (abfd)->e_shstrndx,
781 elf_section_data (sec)->rel_hdr.sh_name));
785 if (strncmp (name, ".rela", 5) != 0
786 || strcmp (bfd_get_section_name (abfd, sec),
789 (*_bfd_error_handler)
790 (_("%s: bad relocation section name `%s\'"),
791 bfd_archive_filename (abfd), name);
794 if (htab->elf.dynobj == NULL)
795 htab->elf.dynobj = abfd;
797 dynobj = htab->elf.dynobj;
798 sreloc = bfd_get_section_by_name (dynobj, name);
803 sreloc = bfd_make_section (dynobj, name);
804 flags = (SEC_HAS_CONTENTS | SEC_READONLY
805 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
806 if ((sec->flags & SEC_ALLOC) != 0)
807 flags |= SEC_ALLOC | SEC_LOAD;
809 || ! bfd_set_section_flags (dynobj, sreloc, flags)
810 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
813 elf_section_data (sec)->sreloc = sreloc;
816 /* If this is a global symbol, we count the number of
817 relocations we need for this symbol. */
820 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
824 /* Track dynamic relocs needed for local syms too.
825 We really need local syms available to do this
829 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
834 head = ((struct elf_s390_dyn_relocs **)
835 &elf_section_data (s)->local_dynrel);
839 if (p == NULL || p->sec != sec)
841 bfd_size_type amt = sizeof *p;
842 p = ((struct elf_s390_dyn_relocs *)
843 bfd_alloc (htab->elf.dynobj, amt));
854 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
855 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
856 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
861 /* This relocation describes the C++ object vtable hierarchy.
862 Reconstruct it for later use during GC. */
863 case R_390_GNU_VTINHERIT:
864 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
868 /* This relocation describes which C++ vtable entries are actually
869 used. Record for later use during GC. */
870 case R_390_GNU_VTENTRY:
871 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
883 /* Return the section that should be marked against GC for a given
887 elf_s390_gc_mark_hook (abfd, info, rel, h, sym)
889 struct bfd_link_info *info ATTRIBUTE_UNUSED;
890 Elf_Internal_Rela *rel;
891 struct elf_link_hash_entry *h;
892 Elf_Internal_Sym *sym;
896 switch (ELF32_R_TYPE (rel->r_info))
898 case R_390_GNU_VTINHERIT:
899 case R_390_GNU_VTENTRY:
903 switch (h->root.type)
905 case bfd_link_hash_defined:
906 case bfd_link_hash_defweak:
907 return h->root.u.def.section;
909 case bfd_link_hash_common:
910 return h->root.u.c.p->section;
919 return bfd_section_from_elf_index (abfd, sym->st_shndx);
925 /* Update the got entry reference counts for the section being removed. */
928 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
930 struct bfd_link_info *info;
932 const Elf_Internal_Rela *relocs;
934 Elf_Internal_Shdr *symtab_hdr;
935 struct elf_link_hash_entry **sym_hashes;
936 bfd_signed_vma *local_got_refcounts;
937 const Elf_Internal_Rela *rel, *relend;
938 unsigned long r_symndx;
939 struct elf_link_hash_entry *h;
941 elf_section_data (sec)->local_dynrel = NULL;
943 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
944 sym_hashes = elf_sym_hashes (abfd);
945 local_got_refcounts = elf_local_got_refcounts (abfd);
947 relend = relocs + sec->reloc_count;
948 for (rel = relocs; rel < relend; rel++)
949 switch (ELF32_R_TYPE (rel->r_info))
956 r_symndx = ELF32_R_SYM (rel->r_info);
957 if (r_symndx >= symtab_hdr->sh_info)
959 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
960 if (h->got.refcount > 0)
961 h->got.refcount -= 1;
963 else if (local_got_refcounts != NULL)
965 if (local_got_refcounts[r_symndx] > 0)
966 local_got_refcounts[r_symndx] -= 1;
977 r_symndx = ELF32_R_SYM (rel->r_info);
978 if (r_symndx >= symtab_hdr->sh_info)
980 struct elf_s390_link_hash_entry *eh;
981 struct elf_s390_dyn_relocs **pp;
982 struct elf_s390_dyn_relocs *p;
984 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
986 if (!info->shared && h->plt.refcount > 0)
987 h->plt.refcount -= 1;
989 eh = (struct elf_s390_link_hash_entry *) h;
991 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
994 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
995 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
996 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1006 case R_390_PLT16DBL:
1008 r_symndx = ELF32_R_SYM (rel->r_info);
1009 if (r_symndx >= symtab_hdr->sh_info)
1011 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1012 if (h->plt.refcount > 0)
1013 h->plt.refcount -= 1;
1024 /* Adjust a symbol defined by a dynamic object and referenced by a
1025 regular object. The current definition is in some section of the
1026 dynamic object, but we're not including those sections. We have to
1027 change the definition to something the rest of the link can
1031 elf_s390_adjust_dynamic_symbol (info, h)
1032 struct bfd_link_info *info;
1033 struct elf_link_hash_entry *h;
1035 struct elf_s390_link_hash_table *htab;
1036 struct elf_s390_link_hash_entry * eh;
1037 struct elf_s390_dyn_relocs *p;
1039 unsigned int power_of_two;
1041 /* If this is a function, put it in the procedure linkage table. We
1042 will fill in the contents of the procedure linkage table later
1043 (although we could actually do it here). */
1044 if (h->type == STT_FUNC
1045 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1047 if (h->plt.refcount <= 0
1049 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
1050 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
1052 /* This case can occur if we saw a PLT32 reloc in an input
1053 file, but the symbol was never referred to by a dynamic
1054 object, or if all references were garbage collected. In
1055 such a case, we don't actually need to build a procedure
1056 linkage table, and we can just do a PC32 reloc instead. */
1057 h->plt.offset = (bfd_vma) -1;
1058 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1064 /* It's possible that we incorrectly decided a .plt reloc was
1065 needed for an R_390_PC32 reloc to a non-function sym in
1066 check_relocs. We can't decide accurately between function and
1067 non-function syms in check-relocs; Objects loaded later in
1068 the link may change h->type. So fix it now. */
1069 h->plt.offset = (bfd_vma) -1;
1071 /* If this is a weak symbol, and there is a real definition, the
1072 processor independent code will have arranged for us to see the
1073 real definition first, and we can just use the same value. */
1074 if (h->weakdef != NULL)
1076 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1077 || h->weakdef->root.type == bfd_link_hash_defweak);
1078 h->root.u.def.section = h->weakdef->root.u.def.section;
1079 h->root.u.def.value = h->weakdef->root.u.def.value;
1083 /* This is a reference to a symbol defined by a dynamic object which
1084 is not a function. */
1086 /* If we are creating a shared library, we must presume that the
1087 only references to the symbol are via the global offset table.
1088 For such cases we need not do anything here; the relocations will
1089 be handled correctly by relocate_section. */
1093 /* If there are no references to this symbol that do not use the
1094 GOT, we don't need to generate a copy reloc. */
1095 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1098 /* If -z nocopyreloc was given, we won't generate them either. */
1099 if (info->nocopyreloc)
1101 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1105 eh = (struct elf_s390_link_hash_entry *) h;
1106 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1108 s = p->sec->output_section;
1109 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1113 /* If we didn't find any dynamic relocs in read-only sections, then
1114 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1117 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1121 /* We must allocate the symbol in our .dynbss section, which will
1122 become part of the .bss section of the executable. There will be
1123 an entry for this symbol in the .dynsym section. The dynamic
1124 object will contain position independent code, so all references
1125 from the dynamic object to this symbol will go through the global
1126 offset table. The dynamic linker will use the .dynsym entry to
1127 determine the address it must put in the global offset table, so
1128 both the dynamic object and the regular object will refer to the
1129 same memory location for the variable. */
1131 htab = elf_s390_hash_table (info);
1133 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1134 copy the initial value out of the dynamic object and into the
1135 runtime process image. */
1136 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1138 htab->srelbss->_raw_size += sizeof (Elf32_External_Rela);
1139 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1142 /* We need to figure out the alignment required for this symbol. I
1143 have no idea how ELF linkers handle this. */
1144 power_of_two = bfd_log2 (h->size);
1145 if (power_of_two > 3)
1148 /* Apply the required alignment. */
1150 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1151 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1153 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1157 /* Define the symbol as being at this point in the section. */
1158 h->root.u.def.section = s;
1159 h->root.u.def.value = s->_raw_size;
1161 /* Increment the section size to make room for the symbol. */
1162 s->_raw_size += h->size;
1167 /* This is the condition under which elf_s390_finish_dynamic_symbol
1168 will be called from elflink.h. If elflink.h doesn't call our
1169 finish_dynamic_symbol routine, we'll need to do something about
1170 initializing any .plt and .got entries in elf_s390_relocate_section. */
1171 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1173 && ((INFO)->shared \
1174 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1175 && ((H)->dynindx != -1 \
1176 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1178 /* Allocate space in .plt, .got and associated reloc sections for
1182 allocate_dynrelocs (h, inf)
1183 struct elf_link_hash_entry *h;
1186 struct bfd_link_info *info;
1187 struct elf_s390_link_hash_table *htab;
1188 struct elf_s390_link_hash_entry *eh;
1189 struct elf_s390_dyn_relocs *p;
1191 if (h->root.type == bfd_link_hash_indirect
1192 || h->root.type == bfd_link_hash_warning)
1195 info = (struct bfd_link_info *) inf;
1196 htab = elf_s390_hash_table (info);
1198 if (htab->elf.dynamic_sections_created
1199 && h->plt.refcount > 0)
1201 /* Make sure this symbol is output as a dynamic symbol.
1202 Undefined weak syms won't yet be marked as dynamic. */
1203 if (h->dynindx == -1
1204 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1206 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1210 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
1212 asection *s = htab->splt;
1214 /* If this is the first .plt entry, make room for the special
1216 if (s->_raw_size == 0)
1217 s->_raw_size += PLT_FIRST_ENTRY_SIZE;
1219 h->plt.offset = s->_raw_size;
1221 /* If this symbol is not defined in a regular file, and we are
1222 not generating a shared library, then set the symbol to this
1223 location in the .plt. This is required to make function
1224 pointers compare as equal between the normal executable and
1225 the shared library. */
1227 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1229 h->root.u.def.section = s;
1230 h->root.u.def.value = h->plt.offset;
1233 /* Make room for this entry. */
1234 s->_raw_size += PLT_ENTRY_SIZE;
1236 /* We also need to make an entry in the .got.plt section, which
1237 will be placed in the .got section by the linker script. */
1238 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1240 /* We also need to make an entry in the .rela.plt section. */
1241 htab->srelplt->_raw_size += sizeof (Elf32_External_Rela);
1245 h->plt.offset = (bfd_vma) -1;
1246 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1251 h->plt.offset = (bfd_vma) -1;
1252 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1255 if (h->got.refcount > 0)
1260 /* Make sure this symbol is output as a dynamic symbol.
1261 Undefined weak syms won't yet be marked as dynamic. */
1262 if (h->dynindx == -1
1263 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1265 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1270 h->got.offset = s->_raw_size;
1271 s->_raw_size += GOT_ENTRY_SIZE;
1272 dyn = htab->elf.dynamic_sections_created;
1273 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
1274 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
1277 h->got.offset = (bfd_vma) -1;
1279 eh = (struct elf_s390_link_hash_entry *) h;
1280 if (eh->dyn_relocs == NULL)
1283 /* In the shared -Bsymbolic case, discard space allocated for
1284 dynamic pc-relative relocs against symbols which turn out to be
1285 defined in regular objects. For the normal shared case, discard
1286 space for pc-relative relocs that have become local due to symbol
1287 visibility changes. */
1291 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1292 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1295 struct elf_s390_dyn_relocs **pp;
1297 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1299 p->count -= p->pc_count;
1310 /* For the non-shared case, discard space for relocs against
1311 symbols which turn out to need copy relocs or are not
1314 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1315 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1316 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1317 || (htab->elf.dynamic_sections_created
1318 && (h->root.type == bfd_link_hash_undefweak
1319 || h->root.type == bfd_link_hash_undefined))))
1321 /* Make sure this symbol is output as a dynamic symbol.
1322 Undefined weak syms won't yet be marked as dynamic. */
1323 if (h->dynindx == -1
1324 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1326 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1330 /* If that succeeded, we know we'll be keeping all the
1332 if (h->dynindx != -1)
1336 eh->dyn_relocs = NULL;
1341 /* Finally, allocate space. */
1342 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1344 asection *sreloc = elf_section_data (p->sec)->sreloc;
1345 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
1351 /* Find any dynamic relocs that apply to read-only sections. */
1354 readonly_dynrelocs (h, inf)
1355 struct elf_link_hash_entry *h;
1358 struct elf_s390_link_hash_entry *eh;
1359 struct elf_s390_dyn_relocs *p;
1361 eh = (struct elf_s390_link_hash_entry *) h;
1362 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1364 asection *s = p->sec->output_section;
1366 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1368 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1370 info->flags |= DF_TEXTREL;
1372 /* Not an error, just cut short the traversal. */
1379 /* Set the sizes of the dynamic sections. */
1382 elf_s390_size_dynamic_sections (output_bfd, info)
1383 bfd *output_bfd ATTRIBUTE_UNUSED;
1384 struct bfd_link_info *info;
1386 struct elf_s390_link_hash_table *htab;
1392 htab = elf_s390_hash_table (info);
1393 dynobj = htab->elf.dynobj;
1397 if (htab->elf.dynamic_sections_created)
1399 /* Set the contents of the .interp section to the interpreter. */
1402 s = bfd_get_section_by_name (dynobj, ".interp");
1405 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1406 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1410 /* Set up .got offsets for local syms, and space for local dynamic
1412 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1414 bfd_signed_vma *local_got;
1415 bfd_signed_vma *end_local_got;
1416 bfd_size_type locsymcount;
1417 Elf_Internal_Shdr *symtab_hdr;
1420 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1423 for (s = ibfd->sections; s != NULL; s = s->next)
1425 struct elf_s390_dyn_relocs *p;
1427 for (p = *((struct elf_s390_dyn_relocs **)
1428 &elf_section_data (s)->local_dynrel);
1432 if (!bfd_is_abs_section (p->sec)
1433 && bfd_is_abs_section (p->sec->output_section))
1435 /* Input section has been discarded, either because
1436 it is a copy of a linkonce section or due to
1437 linker script /DISCARD/, so we'll be discarding
1442 srela = elf_section_data (p->sec)->sreloc;
1443 srela->_raw_size += p->count * sizeof (Elf32_External_Rela);
1448 local_got = elf_local_got_refcounts (ibfd);
1452 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1453 locsymcount = symtab_hdr->sh_info;
1454 end_local_got = local_got + locsymcount;
1456 srela = htab->srelgot;
1457 for (; local_got < end_local_got; ++local_got)
1461 *local_got = s->_raw_size;
1462 s->_raw_size += GOT_ENTRY_SIZE;
1464 srela->_raw_size += sizeof (Elf32_External_Rela);
1467 *local_got = (bfd_vma) -1;
1471 /* Allocate global sym .plt and .got entries, and space for global
1472 sym dynamic relocs. */
1473 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1475 /* We now have determined the sizes of the various dynamic sections.
1476 Allocate memory for them. */
1478 for (s = dynobj->sections; s != NULL; s = s->next)
1480 if ((s->flags & SEC_LINKER_CREATED) == 0)
1485 || s == htab->sgotplt)
1487 /* Strip this section if we don't need it; see the
1490 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
1492 if (s->_raw_size != 0 && s != htab->srelplt)
1495 /* We use the reloc_count field as a counter if we need
1496 to copy relocs into the output file. */
1501 /* It's not one of our sections, so don't allocate space. */
1505 if (s->_raw_size == 0)
1507 /* If we don't need this section, strip it from the
1508 output file. This is to handle .rela.bss and
1509 .rela.plt. We must create it in
1510 create_dynamic_sections, because it must be created
1511 before the linker maps input sections to output
1512 sections. The linker does that before
1513 adjust_dynamic_symbol is called, and it is that
1514 function which decides whether anything needs to go
1515 into these sections. */
1517 _bfd_strip_section_from_output (info, s);
1521 /* Allocate memory for the section contents. We use bfd_zalloc
1522 here in case unused entries are not reclaimed before the
1523 section's contents are written out. This should not happen,
1524 but this way if it does, we get a R_390_NONE reloc instead
1526 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1527 if (s->contents == NULL)
1531 if (htab->elf.dynamic_sections_created)
1533 /* Add some entries to the .dynamic section. We fill in the
1534 values later, in elf_s390_finish_dynamic_sections, but we
1535 must add the entries now so that we get the correct size for
1536 the .dynamic section. The DT_DEBUG entry is filled in by the
1537 dynamic linker and used by the debugger. */
1538 #define add_dynamic_entry(TAG, VAL) \
1539 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1543 if (!add_dynamic_entry (DT_DEBUG, 0))
1547 if (htab->splt->_raw_size != 0)
1549 if (!add_dynamic_entry (DT_PLTGOT, 0)
1550 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1551 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1552 || !add_dynamic_entry (DT_JMPREL, 0))
1558 if (!add_dynamic_entry (DT_RELA, 0)
1559 || !add_dynamic_entry (DT_RELASZ, 0)
1560 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1563 /* If any dynamic relocs apply to a read-only section,
1564 then we need a DT_TEXTREL entry. */
1565 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, (PTR) info);
1567 if ((info->flags & DF_TEXTREL) != 0)
1569 if (!add_dynamic_entry (DT_TEXTREL, 0))
1574 #undef add_dynamic_entry
1579 /* Relocate a 390 ELF section. */
1582 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
1583 contents, relocs, local_syms, local_sections)
1585 struct bfd_link_info *info;
1587 asection *input_section;
1589 Elf_Internal_Rela *relocs;
1590 Elf_Internal_Sym *local_syms;
1591 asection **local_sections;
1593 struct elf_s390_link_hash_table *htab;
1594 Elf_Internal_Shdr *symtab_hdr;
1595 struct elf_link_hash_entry **sym_hashes;
1596 bfd_vma *local_got_offsets;
1597 Elf_Internal_Rela *rel;
1598 Elf_Internal_Rela *relend;
1600 htab = elf_s390_hash_table (info);
1601 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1602 sym_hashes = elf_sym_hashes (input_bfd);
1603 local_got_offsets = elf_local_got_offsets (input_bfd);
1606 relend = relocs + input_section->reloc_count;
1607 for (; rel < relend; rel++)
1610 reloc_howto_type *howto;
1611 unsigned long r_symndx;
1612 struct elf_link_hash_entry *h;
1613 Elf_Internal_Sym *sym;
1617 boolean unresolved_reloc;
1618 bfd_reloc_status_type r;
1620 r_type = ELF32_R_TYPE (rel->r_info);
1621 if (r_type == (int) R_390_GNU_VTINHERIT
1622 || r_type == (int) R_390_GNU_VTENTRY)
1624 if (r_type < 0 || r_type >= (int) R_390_max)
1626 bfd_set_error (bfd_error_bad_value);
1629 howto = elf_howto_table + r_type;
1631 r_symndx = ELF32_R_SYM (rel->r_info);
1633 if (info->relocateable)
1635 /* This is a relocateable link. We don't have to change
1636 anything, unless the reloc is against a section symbol,
1637 in which case we have to adjust according to where the
1638 section symbol winds up in the output section. */
1639 if (r_symndx < symtab_hdr->sh_info)
1641 sym = local_syms + r_symndx;
1642 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1644 sec = local_sections[r_symndx];
1645 rel->r_addend += sec->output_offset + sym->st_value;
1652 /* This is a final link. */
1656 unresolved_reloc = false;
1657 if (r_symndx < symtab_hdr->sh_info)
1659 sym = local_syms + r_symndx;
1660 sec = local_sections[r_symndx];
1661 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1665 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1666 while (h->root.type == bfd_link_hash_indirect
1667 || h->root.type == bfd_link_hash_warning)
1668 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1670 if (h->root.type == bfd_link_hash_defined
1671 || h->root.type == bfd_link_hash_defweak)
1673 sec = h->root.u.def.section;
1674 if (sec->output_section == NULL)
1676 /* Set a flag that will be cleared later if we find a
1677 relocation value for this symbol. output_section
1678 is typically NULL for symbols satisfied by a shared
1680 unresolved_reloc = true;
1684 relocation = (h->root.u.def.value
1685 + sec->output_section->vma
1686 + sec->output_offset);
1688 else if (h->root.type == bfd_link_hash_undefweak)
1690 else if (info->shared
1691 && (!info->symbolic || info->allow_shlib_undefined)
1692 && !info->no_undefined
1693 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1697 if (! ((*info->callbacks->undefined_symbol)
1698 (info, h->root.root.string, input_bfd,
1699 input_section, rel->r_offset,
1700 (!info->shared || info->no_undefined
1701 || ELF_ST_VISIBILITY (h->other)))))
1712 /* Relocation is to the entry for this symbol in the global
1714 if (htab->sgot == NULL)
1721 off = h->got.offset;
1722 dyn = htab->elf.dynamic_sections_created;
1723 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
1727 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
1728 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1730 /* This is actually a static link, or it is a
1731 -Bsymbolic link and the symbol is defined
1732 locally, or the symbol was forced to be local
1733 because of a version file. We must initialize
1734 this entry in the global offset table. Since the
1735 offset must always be a multiple of 2, we use the
1736 least significant bit to record whether we have
1737 initialized it already.
1739 When doing a dynamic link, we create a .rel.got
1740 relocation entry to initialize the value. This
1741 is done in the finish_dynamic_symbol routine. */
1746 bfd_put_32 (output_bfd, relocation,
1747 htab->sgot->contents + off);
1752 unresolved_reloc = false;
1756 if (local_got_offsets == NULL)
1759 off = local_got_offsets[r_symndx];
1761 /* The offset must always be a multiple of 4. We use
1762 the least significant bit to record whether we have
1763 already generated the necessary reloc. */
1768 bfd_put_32 (output_bfd, relocation,
1769 htab->sgot->contents + off);
1774 Elf_Internal_Rela outrel;
1775 Elf32_External_Rela *loc;
1777 srelgot = htab->srelgot;
1778 if (srelgot == NULL)
1781 outrel.r_offset = (htab->sgot->output_section->vma
1782 + htab->sgot->output_offset
1784 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
1785 outrel.r_addend = relocation;
1786 loc = (Elf32_External_Rela *) srelgot->contents;
1787 loc += srelgot->reloc_count++;
1788 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1791 local_got_offsets[r_symndx] |= 1;
1795 if (off >= (bfd_vma) -2)
1798 relocation = htab->sgot->output_offset + off;
1802 /* Relocation is relative to the start of the global offset
1805 /* Note that sgot->output_offset is not involved in this
1806 calculation. We always want the start of .got. If we
1807 defined _GLOBAL_OFFSET_TABLE in a different way, as is
1808 permitted by the ABI, we might have to change this
1810 relocation -= htab->sgot->output_section->vma;
1814 /* Use global offset table as symbol value. */
1815 relocation = htab->sgot->output_section->vma;
1816 unresolved_reloc = false;
1819 case R_390_PLT16DBL:
1821 /* Relocation is to the entry for this symbol in the
1822 procedure linkage table. */
1824 /* Resolve a PLT32 reloc against a local symbol directly,
1825 without using the procedure linkage table. */
1829 if (h->plt.offset == (bfd_vma) -1
1830 || htab->splt == NULL)
1832 /* We didn't make a PLT entry for this symbol. This
1833 happens when statically linking PIC code, or when
1834 using -Bsymbolic. */
1838 relocation = (htab->splt->output_section->vma
1839 + htab->splt->output_offset
1841 unresolved_reloc = false;
1850 /* r_symndx will be zero only for relocs against symbols
1851 from removed linkonce sections, or sections discarded by
1854 || (input_section->flags & SEC_ALLOC) == 0)
1858 && ((r_type != R_390_PC16
1859 && r_type != R_390_PC16DBL
1860 && r_type != R_390_PC32)
1863 && (! info->symbolic
1864 || (h->elf_link_hash_flags
1865 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1869 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1870 && (((h->elf_link_hash_flags
1871 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1872 && (h->elf_link_hash_flags
1873 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1874 || h->root.type == bfd_link_hash_undefweak
1875 || h->root.type == bfd_link_hash_undefined)))
1877 Elf_Internal_Rela outrel;
1878 boolean skip, relocate;
1880 Elf32_External_Rela *loc;
1882 /* When generating a shared object, these relocations
1883 are copied into the output file to be resolved at run
1889 _bfd_elf_section_offset (output_bfd, info, input_section,
1891 if (outrel.r_offset == (bfd_vma) -1)
1893 outrel.r_offset += (input_section->output_section->vma
1894 + input_section->output_offset);
1898 memset (&outrel, 0, sizeof outrel);
1903 && (r_type == R_390_PC16
1904 || r_type == R_390_PC16DBL
1905 || r_type == R_390_PC32
1908 || (h->elf_link_hash_flags
1909 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1912 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1913 outrel.r_addend = rel->r_addend;
1917 /* This symbol is local, or marked to become local. */
1919 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
1920 outrel.r_addend = relocation + rel->r_addend;
1923 sreloc = elf_section_data (input_section)->sreloc;
1927 loc = (Elf32_External_Rela *) sreloc->contents;
1928 loc += sreloc->reloc_count++;
1929 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1931 /* If this reloc is against an external symbol, we do
1932 not want to fiddle with the addend. Otherwise, we
1933 need to include the symbol value so that it becomes
1934 an addend for the dynamic reloc. */
1944 if (unresolved_reloc
1946 && (input_section->flags & SEC_DEBUGGING) != 0
1947 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
1948 (*_bfd_error_handler)
1949 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
1950 bfd_archive_filename (input_bfd),
1951 bfd_get_section_name (input_bfd, input_section),
1952 (long) rel->r_offset,
1953 h->root.root.string);
1955 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1956 contents, rel->r_offset,
1957 relocation, rel->r_addend);
1959 if (r != bfd_reloc_ok)
1964 name = h->root.root.string;
1967 name = bfd_elf_string_from_elf_section (input_bfd,
1968 symtab_hdr->sh_link,
1973 name = bfd_section_name (input_bfd, sec);
1976 if (r == bfd_reloc_overflow)
1979 if (! ((*info->callbacks->reloc_overflow)
1980 (info, name, howto->name, (bfd_vma) 0,
1981 input_bfd, input_section, rel->r_offset)))
1986 (*_bfd_error_handler)
1987 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
1988 bfd_archive_filename (input_bfd),
1989 bfd_get_section_name (input_bfd, input_section),
1990 (long) rel->r_offset, name, (int) r);
1999 /* Finish up dynamic symbol handling. We set the contents of various
2000 dynamic sections here. */
2003 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
2005 struct bfd_link_info *info;
2006 struct elf_link_hash_entry *h;
2007 Elf_Internal_Sym *sym;
2009 struct elf_s390_link_hash_table *htab;
2011 htab = elf_s390_hash_table (info);
2013 if (h->plt.offset != (bfd_vma) -1)
2017 Elf_Internal_Rela rela;
2018 Elf32_External_Rela *loc;
2019 bfd_vma relative_offset;
2021 /* This symbol has an entry in the procedure linkage table. Set
2024 if (h->dynindx == -1
2025 || htab->splt == NULL
2026 || htab->sgotplt == NULL
2027 || htab->srelplt == NULL)
2031 Current offset - size first entry / entry size. */
2032 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
2034 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2036 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
2038 /* S390 uses halfwords for relative branch calc! */
2039 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
2040 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
2041 /* If offset is > 32768, branch to a previous branch
2042 390 can only handle +-64 K jumps. */
2043 if ( -32768 > (int) relative_offset )
2045 -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
2047 /* Fill in the entry in the procedure linkage table. */
2050 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
2051 htab->splt->contents + h->plt.offset);
2052 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
2053 htab->splt->contents + h->plt.offset + 4);
2054 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
2055 htab->splt->contents + h->plt.offset + 8);
2056 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
2057 htab->splt->contents + h->plt.offset + 12);
2058 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
2059 htab->splt->contents + h->plt.offset + 16);
2060 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2061 htab->splt->contents + h->plt.offset + 20);
2062 bfd_put_32 (output_bfd,
2063 (htab->sgotplt->output_section->vma
2064 + htab->sgotplt->output_offset
2066 htab->splt->contents + h->plt.offset + 24);
2068 else if (got_offset < 4096)
2070 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
2071 htab->splt->contents + h->plt.offset);
2072 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
2073 htab->splt->contents + h->plt.offset + 4);
2074 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
2075 htab->splt->contents + h->plt.offset + 8);
2076 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
2077 htab->splt->contents + h->plt.offset + 12);
2078 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
2079 htab->splt->contents + h->plt.offset + 16);
2080 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2081 htab->splt->contents + h->plt.offset + 20);
2082 bfd_put_32 (output_bfd, (bfd_vma) 0,
2083 htab->splt->contents + h->plt.offset + 24);
2085 else if (got_offset < 32768)
2087 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
2088 htab->splt->contents + h->plt.offset);
2089 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
2090 htab->splt->contents + h->plt.offset + 4);
2091 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
2092 htab->splt->contents + h->plt.offset + 8);
2093 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
2094 htab->splt->contents + h->plt.offset + 12);
2095 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
2096 htab->splt->contents + h->plt.offset + 16);
2097 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2098 htab->splt->contents + h->plt.offset + 20);
2099 bfd_put_32 (output_bfd, (bfd_vma) 0,
2100 htab->splt->contents + h->plt.offset + 24);
2104 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
2105 htab->splt->contents + h->plt.offset);
2106 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
2107 htab->splt->contents + h->plt.offset + 4);
2108 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
2109 htab->splt->contents + h->plt.offset + 8);
2110 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
2111 htab->splt->contents + h->plt.offset + 12);
2112 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
2113 htab->splt->contents + h->plt.offset + 16);
2114 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
2115 htab->splt->contents + h->plt.offset + 20);
2116 bfd_put_32 (output_bfd, got_offset,
2117 htab->splt->contents + h->plt.offset + 24);
2119 /* Insert offset into reloc. table here. */
2120 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
2121 htab->splt->contents + h->plt.offset + 28);
2123 /* Fill in the entry in the global offset table.
2124 Points to instruction after GOT offset. */
2125 bfd_put_32 (output_bfd,
2126 (htab->splt->output_section->vma
2127 + htab->splt->output_offset
2130 htab->sgotplt->contents + got_offset);
2132 /* Fill in the entry in the .rela.plt section. */
2133 rela.r_offset = (htab->sgotplt->output_section->vma
2134 + htab->sgotplt->output_offset
2136 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
2138 loc = (Elf32_External_Rela *) htab->srelplt->contents + plt_index;
2139 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2141 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2143 /* Mark the symbol as undefined, rather than as defined in
2144 the .plt section. Leave the value alone. This is a clue
2145 for the dynamic linker, to make function pointer
2146 comparisons work between an application and shared
2148 sym->st_shndx = SHN_UNDEF;
2152 if (h->got.offset != (bfd_vma) -1)
2154 Elf_Internal_Rela rela;
2155 Elf32_External_Rela *loc;
2157 /* This symbol has an entry in the global offset table. Set it
2160 if (htab->sgot == NULL || htab->srelgot == NULL)
2163 rela.r_offset = (htab->sgot->output_section->vma
2164 + htab->sgot->output_offset
2165 + (h->got.offset &~ (bfd_vma) 1));
2167 /* If this is a static link, or it is a -Bsymbolic link and the
2168 symbol is defined locally or was forced to be local because
2169 of a version file, we just want to emit a RELATIVE reloc.
2170 The entry in the global offset table will already have been
2171 initialized in the relocate_section function. */
2175 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2176 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2178 BFD_ASSERT((h->got.offset & 1) != 0);
2179 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2180 rela.r_addend = (h->root.u.def.value
2181 + h->root.u.def.section->output_section->vma
2182 + h->root.u.def.section->output_offset);
2186 BFD_ASSERT((h->got.offset & 1) == 0);
2187 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
2188 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
2192 loc = (Elf32_External_Rela *) htab->srelgot->contents;
2193 loc += htab->srelgot->reloc_count++;
2194 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2197 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2199 Elf_Internal_Rela rela;
2200 Elf32_External_Rela *loc;
2202 /* This symbols needs a copy reloc. Set it up. */
2204 if (h->dynindx == -1
2205 || (h->root.type != bfd_link_hash_defined
2206 && h->root.type != bfd_link_hash_defweak)
2207 || htab->srelbss == NULL)
2210 rela.r_offset = (h->root.u.def.value
2211 + h->root.u.def.section->output_section->vma
2212 + h->root.u.def.section->output_offset);
2213 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
2215 loc = (Elf32_External_Rela *) htab->srelbss->contents;
2216 loc += htab->srelbss->reloc_count++;
2217 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2220 /* Mark some specially defined symbols as absolute. */
2221 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2222 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2223 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2224 sym->st_shndx = SHN_ABS;
2229 /* Used to decide how to sort relocs in an optimal manner for the
2230 dynamic linker, before writing them out. */
2232 static enum elf_reloc_type_class
2233 elf_s390_reloc_type_class (rela)
2234 const Elf_Internal_Rela *rela;
2236 switch ((int) ELF32_R_TYPE (rela->r_info))
2238 case R_390_RELATIVE:
2239 return reloc_class_relative;
2240 case R_390_JMP_SLOT:
2241 return reloc_class_plt;
2243 return reloc_class_copy;
2245 return reloc_class_normal;
2249 /* Finish up the dynamic sections. */
2252 elf_s390_finish_dynamic_sections (output_bfd, info)
2254 struct bfd_link_info *info;
2256 struct elf_s390_link_hash_table *htab;
2260 htab = elf_s390_hash_table (info);
2261 dynobj = htab->elf.dynobj;
2262 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2264 if (htab->elf.dynamic_sections_created)
2266 Elf32_External_Dyn *dyncon, *dynconend;
2268 if (sdyn == NULL || htab->sgot == NULL)
2271 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2272 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2273 for (; dyncon < dynconend; dyncon++)
2275 Elf_Internal_Dyn dyn;
2278 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2286 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
2290 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
2294 s = htab->srelplt->output_section;
2295 if (s->_cooked_size != 0)
2296 dyn.d_un.d_val = s->_cooked_size;
2298 dyn.d_un.d_val = s->_raw_size;
2302 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2305 /* Fill in the special first entry in the procedure linkage table. */
2306 if (htab->splt && htab->splt->_raw_size > 0)
2308 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
2311 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
2312 htab->splt->contents );
2313 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
2314 htab->splt->contents +4 );
2315 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
2316 htab->splt->contents +8 );
2317 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
2318 htab->splt->contents +12 );
2319 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
2320 htab->splt->contents +16 );
2324 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
2325 htab->splt->contents );
2326 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
2327 htab->splt->contents +4 );
2328 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
2329 htab->splt->contents +8 );
2330 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
2331 htab->splt->contents +12 );
2332 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
2333 htab->splt->contents +16 );
2334 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
2335 htab->splt->contents +20 );
2336 bfd_put_32 (output_bfd,
2337 htab->sgotplt->output_section->vma
2338 + htab->sgotplt->output_offset,
2339 htab->splt->contents + 24);
2341 elf_section_data (htab->splt->output_section)
2342 ->this_hdr.sh_entsize = 4;
2349 /* Fill in the first three entries in the global offset table. */
2350 if (htab->sgotplt->_raw_size > 0)
2352 bfd_put_32 (output_bfd,
2353 (sdyn == NULL ? (bfd_vma) 0
2354 : sdyn->output_section->vma + sdyn->output_offset),
2355 htab->sgotplt->contents);
2356 /* One entry for shared object struct ptr. */
2357 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
2358 /* One entry for _dl_runtime_resolve. */
2359 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
2362 elf_section_data (htab->sgotplt->output_section)
2363 ->this_hdr.sh_entsize = 4;
2369 elf_s390_object_p (abfd)
2372 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_esa);
2376 elf_s390_grok_prstatus (abfd, note)
2378 Elf_Internal_Note * note;
2381 unsigned int raw_size;
2383 switch (note->descsz)
2388 case 224: /* S/390 Linux. */
2390 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2393 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
2401 /* Make a ".reg/999" section. */
2402 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2403 raw_size, note->descpos + offset);
2406 #define TARGET_BIG_SYM bfd_elf32_s390_vec
2407 #define TARGET_BIG_NAME "elf32-s390"
2408 #define ELF_ARCH bfd_arch_s390
2409 #define ELF_MACHINE_CODE EM_S390
2410 #define ELF_MACHINE_ALT1 EM_S390_OLD
2411 #define ELF_MAXPAGESIZE 0x1000
2413 #define elf_backend_can_gc_sections 1
2414 #define elf_backend_can_refcount 1
2415 #define elf_backend_want_got_plt 1
2416 #define elf_backend_plt_readonly 1
2417 #define elf_backend_want_plt_sym 0
2418 #define elf_backend_got_header_size 12
2419 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
2421 #define elf_info_to_howto elf_s390_info_to_howto
2423 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
2424 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
2425 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
2427 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
2428 #define elf_backend_check_relocs elf_s390_check_relocs
2429 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
2430 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
2431 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
2432 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
2433 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
2434 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
2435 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
2436 #define elf_backend_relocate_section elf_s390_relocate_section
2437 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
2438 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
2439 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
2441 #define elf_backend_object_p elf_s390_object_p
2443 #include "elf32-target.h"