1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
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 ((asection *, 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 *));
75 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
76 from smaller values. Start with zero, widen, *then* decrement. */
77 #define MINUS_ONE (((bfd_vma)0) - 1)
79 /* 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, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_COPY", false, 0,MINUS_ONE, false),
105 HOWTO(R_390_GLOB_DAT, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GLOB_DAT",false, 0,MINUS_ONE, false),
106 HOWTO(R_390_JMP_SLOT, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_JMP_SLOT",false, 0,MINUS_ONE, false),
107 HOWTO(R_390_RELATIVE, 0, 4, 64, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_RELATIVE",false, 0,MINUS_ONE, false),
108 HOWTO(R_390_GOTOFF, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF", false, 0,MINUS_ONE, false),
109 HOWTO(R_390_GOTPC, 0, 4, 64, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,MINUS_ONE, 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,MINUS_ONE, true),
117 HOWTO(R_390_64, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_64", false, 0,MINUS_ONE, false),
118 HOWTO(R_390_PC64, 0, 4, 64, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC64", false, 0,MINUS_ONE, true),
119 HOWTO(R_390_GOT64, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT64", false, 0,MINUS_ONE, false),
120 HOWTO(R_390_PLT64, 0, 4, 64, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT64", false, 0,MINUS_ONE, true),
121 HOWTO(R_390_GOTENT, 1, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTENT", false, 0,MINUS_ONE, true),
124 /* GNU extension to record C++ vtable hierarchy. */
125 static reloc_howto_type elf64_s390_vtinherit_howto =
126 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false);
127 static reloc_howto_type elf64_s390_vtentry_howto =
128 HOWTO (R_390_GNU_VTENTRY, 0,4,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", false,0,0, false);
130 static reloc_howto_type *
131 elf_s390_reloc_type_lookup (abfd, code)
132 bfd *abfd ATTRIBUTE_UNUSED;
133 bfd_reloc_code_real_type code;
138 return &elf_howto_table[(int) R_390_NONE];
140 return &elf_howto_table[(int) R_390_8];
141 case BFD_RELOC_390_12:
142 return &elf_howto_table[(int) R_390_12];
144 return &elf_howto_table[(int) R_390_16];
146 return &elf_howto_table[(int) R_390_32];
148 return &elf_howto_table[(int) R_390_32];
149 case BFD_RELOC_32_PCREL:
150 return &elf_howto_table[(int) R_390_PC32];
151 case BFD_RELOC_390_GOT12:
152 return &elf_howto_table[(int) R_390_GOT12];
153 case BFD_RELOC_32_GOT_PCREL:
154 return &elf_howto_table[(int) R_390_GOT32];
155 case BFD_RELOC_390_PLT32:
156 return &elf_howto_table[(int) R_390_PLT32];
157 case BFD_RELOC_390_COPY:
158 return &elf_howto_table[(int) R_390_COPY];
159 case BFD_RELOC_390_GLOB_DAT:
160 return &elf_howto_table[(int) R_390_GLOB_DAT];
161 case BFD_RELOC_390_JMP_SLOT:
162 return &elf_howto_table[(int) R_390_JMP_SLOT];
163 case BFD_RELOC_390_RELATIVE:
164 return &elf_howto_table[(int) R_390_RELATIVE];
165 case BFD_RELOC_32_GOTOFF:
166 return &elf_howto_table[(int) R_390_GOTOFF];
167 case BFD_RELOC_390_GOTPC:
168 return &elf_howto_table[(int) R_390_GOTPC];
169 case BFD_RELOC_390_GOT16:
170 return &elf_howto_table[(int) R_390_GOT16];
171 case BFD_RELOC_16_PCREL:
172 return &elf_howto_table[(int) R_390_PC16];
173 case BFD_RELOC_390_PC16DBL:
174 return &elf_howto_table[(int) R_390_PC16DBL];
175 case BFD_RELOC_390_PLT16DBL:
176 return &elf_howto_table[(int) R_390_PLT16DBL];
177 case BFD_RELOC_VTABLE_INHERIT:
178 return &elf64_s390_vtinherit_howto;
179 case BFD_RELOC_VTABLE_ENTRY:
180 return &elf64_s390_vtentry_howto;
181 case BFD_RELOC_390_PC32DBL:
182 return &elf_howto_table[(int) R_390_PC32DBL];
183 case BFD_RELOC_390_PLT32DBL:
184 return &elf_howto_table[(int) R_390_PLT32DBL];
185 case BFD_RELOC_390_GOTPCDBL:
186 return &elf_howto_table[(int) R_390_GOTPCDBL];
188 return &elf_howto_table[(int) R_390_64];
189 case BFD_RELOC_64_PCREL:
190 return &elf_howto_table[(int) R_390_PC64];
191 case BFD_RELOC_390_GOT64:
192 return &elf_howto_table[(int) R_390_GOT64];
193 case BFD_RELOC_390_PLT64:
194 return &elf_howto_table[(int) R_390_PLT64];
195 case BFD_RELOC_390_GOTENT:
196 return &elf_howto_table[(int) R_390_GOTENT];
203 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
204 and elf64-s390.c has its own copy. */
207 elf_s390_info_to_howto (abfd, cache_ptr, dst)
208 bfd *abfd ATTRIBUTE_UNUSED;
210 Elf_Internal_Rela *dst;
212 switch (ELF64_R_TYPE(dst->r_info))
214 case R_390_GNU_VTINHERIT:
215 cache_ptr->howto = &elf64_s390_vtinherit_howto;
218 case R_390_GNU_VTENTRY:
219 cache_ptr->howto = &elf64_s390_vtentry_howto;
223 BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
224 cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)];
229 elf_s390_is_local_label_name (abfd, name)
233 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
236 return _bfd_elf_is_local_label_name (abfd, name);
239 /* Functions for the 390 ELF linker. */
241 /* The name of the dynamic interpreter. This is put in the .interp
244 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
246 /* The size in bytes of the first entry in the procedure linkage table. */
247 #define PLT_FIRST_ENTRY_SIZE 32
248 /* The size in bytes of an entry in the procedure linkage table. */
249 #define PLT_ENTRY_SIZE 32
251 #define GOT_ENTRY_SIZE 8
253 /* The first three entries in a procedure linkage table are reserved,
254 and the initial contents are unimportant (we zero them out).
255 Subsequent entries look like this. See the SVR4 ABI 386
256 supplement to see how this works. */
258 /* For the s390, simple addr offset can only be 0 - 4096.
259 To use the full 16777216 TB address space, several instructions
260 are needed to load an address in a register and execute
261 a branch( or just saving the address)
263 Furthermore, only r 0 and 1 are free to use!!! */
265 /* The first 3 words in the GOT are then reserved.
266 Word 0 is the address of the dynamic table.
267 Word 1 is a pointer to a structure describing the object
268 Word 2 is used to point to the loader entry address.
270 The code for PLT entries looks like this:
272 The GOT holds the address in the PLT to be executed.
273 The loader then gets:
274 24(15) = Pointer to the structure describing the object.
275 28(15) = Offset in symbol table
276 The loader must then find the module where the function is
277 and insert the address in the GOT.
279 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
280 LG 1,0(1) # 6 bytes Load address from GOT in r1
281 BCR 15,1 # 2 bytes Jump to address
282 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
283 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
284 BRCL 15,-x # 6 bytes Jump to start of PLT
285 .long ? # 4 bytes offset into symbol table
287 Total = 32 bytes per PLT entry
288 Fixup at offset 2: relative address to GOT entry
289 Fixup at offset 22: relative branch to PLT0
290 Fixup at offset 28: 32 bit offset into symbol table
292 A 32 bit offset into the symbol table is enough. It allows for symbol
293 tables up to a size of 2 gigabyte. A single dynamic object (the main
294 program, any shared library) is limited to 4GB in size and I want to see
295 the program that manages to have a symbol table of more than 2 GB with a
296 total size of at max 4 GB. */
298 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
299 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
300 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
301 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
302 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
303 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
304 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
305 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
307 /* The first PLT entry pushes the offset into the symbol table
308 from R1 onto the stack at 8(15) and the loader object info
309 at 12(15), loads the loader address in R1 and jumps to it. */
311 /* The first entry in the PLT:
314 STG 1,56(15) # r1 contains the offset into the symbol table
315 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
316 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
317 LG 1,16(1) # get entry address of loader
318 BCR 15,1 # jump to loader
320 Fixup at offset 8: relative address to start of GOT. */
322 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
323 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
324 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
325 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
326 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
327 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
328 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
329 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
331 /* The s390 linker needs to keep track of the number of relocs that it
332 decides to copy as dynamic relocs in check_relocs for each symbol.
333 This is so that it can later discard them if they are found to be
334 unnecessary. We store the information in a field extending the
335 regular ELF linker hash table. */
337 struct elf_s390_dyn_relocs
339 struct elf_s390_dyn_relocs *next;
341 /* The input section of the reloc. */
344 /* Total number of relocs copied for the input section. */
347 /* Number of pc-relative relocs copied for the input section. */
348 bfd_size_type pc_count;
351 /* s390 ELF linker hash entry. */
353 struct elf_s390_link_hash_entry
355 struct elf_link_hash_entry elf;
357 /* Track dynamic relocs copied for this symbol. */
358 struct elf_s390_dyn_relocs *dyn_relocs;
361 /* s390 ELF linker hash table. */
363 struct elf_s390_link_hash_table
365 struct elf_link_hash_table elf;
367 /* Short-cuts to get to dynamic linker sections. */
376 /* Small local sym to section mapping cache. */
377 struct sym_sec_cache sym_sec;
380 /* Get the s390 ELF linker hash table from a link_info structure. */
382 #define elf_s390_hash_table(p) \
383 ((struct elf_s390_link_hash_table *) ((p)->hash))
385 /* Create an entry in an s390 ELF linker hash table. */
387 static struct bfd_hash_entry *
388 link_hash_newfunc (entry, table, string)
389 struct bfd_hash_entry *entry;
390 struct bfd_hash_table *table;
393 /* Allocate the structure if it has not already been allocated by a
397 entry = bfd_hash_allocate (table,
398 sizeof (struct elf_s390_link_hash_entry));
403 /* Call the allocation method of the superclass. */
404 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
407 struct elf_s390_link_hash_entry *eh;
409 eh = (struct elf_s390_link_hash_entry *) entry;
410 eh->dyn_relocs = NULL;
416 /* Create an s390 ELF linker hash table. */
418 static struct bfd_link_hash_table *
419 elf_s390_link_hash_table_create (abfd)
422 struct elf_s390_link_hash_table *ret;
423 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
425 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
429 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
442 ret->sym_sec.abfd = NULL;
444 return &ret->elf.root;
447 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
448 shortcuts to them in our hash table. */
451 create_got_section (dynobj, info)
453 struct bfd_link_info *info;
455 struct elf_s390_link_hash_table *htab;
457 if (! _bfd_elf_create_got_section (dynobj, info))
460 htab = elf_s390_hash_table (info);
461 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
462 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
463 if (!htab->sgot || !htab->sgotplt)
466 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
467 if (htab->srelgot == NULL
468 || ! bfd_set_section_flags (dynobj, htab->srelgot,
469 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
470 | SEC_IN_MEMORY | SEC_LINKER_CREATED
472 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
477 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
478 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
482 elf_s390_create_dynamic_sections (dynobj, info)
484 struct bfd_link_info *info;
486 struct elf_s390_link_hash_table *htab;
488 htab = elf_s390_hash_table (info);
489 if (!htab->sgot && !create_got_section (dynobj, info))
492 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
495 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
496 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
497 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
499 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
501 if (!htab->splt || !htab->srelplt || !htab->sdynbss
502 || (!info->shared && !htab->srelbss))
508 /* Copy the extra info we tack onto an elf_link_hash_entry. */
511 elf_s390_copy_indirect_symbol (dir, ind)
512 struct elf_link_hash_entry *dir, *ind;
514 struct elf_s390_link_hash_entry *edir, *eind;
516 edir = (struct elf_s390_link_hash_entry *) dir;
517 eind = (struct elf_s390_link_hash_entry *) ind;
519 if (eind->dyn_relocs != NULL)
521 if (edir->dyn_relocs != NULL)
523 struct elf_s390_dyn_relocs **pp;
524 struct elf_s390_dyn_relocs *p;
526 if (ind->root.type == bfd_link_hash_indirect)
529 /* Add reloc counts against the weak sym to the strong sym
530 list. Merge any entries against the same section. */
531 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
533 struct elf_s390_dyn_relocs *q;
535 for (q = edir->dyn_relocs; q != NULL; q = q->next)
536 if (q->sec == p->sec)
538 q->pc_count += p->pc_count;
539 q->count += p->count;
546 *pp = edir->dyn_relocs;
549 edir->dyn_relocs = eind->dyn_relocs;
550 eind->dyn_relocs = NULL;
553 _bfd_elf_link_hash_copy_indirect (dir, ind);
556 /* Look through the relocs for a section during the first phase, and
557 allocate space in the global offset table or procedure linkage
561 elf_s390_check_relocs (abfd, info, sec, relocs)
563 struct bfd_link_info *info;
565 const Elf_Internal_Rela *relocs;
567 struct elf_s390_link_hash_table *htab;
568 Elf_Internal_Shdr *symtab_hdr;
569 struct elf_link_hash_entry **sym_hashes;
570 const Elf_Internal_Rela *rel;
571 const Elf_Internal_Rela *rel_end;
574 if (info->relocateable)
577 htab = elf_s390_hash_table (info);
578 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
579 sym_hashes = elf_sym_hashes (abfd);
583 rel_end = relocs + sec->reloc_count;
584 for (rel = relocs; rel < rel_end; rel++)
586 unsigned long r_symndx;
587 struct elf_link_hash_entry *h;
589 r_symndx = ELF64_R_SYM (rel->r_info);
591 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
593 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
594 bfd_archive_filename (abfd),
599 if (r_symndx < symtab_hdr->sh_info)
602 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
604 switch (ELF64_R_TYPE (rel->r_info))
611 /* This symbol requires a global offset table entry. */
614 h->got.refcount += 1;
618 bfd_signed_vma *local_got_refcounts;
620 /* This is a global offset table entry for a local symbol. */
621 local_got_refcounts = elf_local_got_refcounts (abfd);
622 if (local_got_refcounts == NULL)
626 size = symtab_hdr->sh_info;
627 size *= sizeof (bfd_signed_vma);
628 local_got_refcounts = ((bfd_signed_vma *)
629 bfd_zalloc (abfd, size));
630 if (local_got_refcounts == NULL)
632 elf_local_got_refcounts (abfd) = local_got_refcounts;
634 local_got_refcounts[r_symndx] += 1;
641 if (htab->sgot == NULL)
643 if (htab->elf.dynobj == NULL)
644 htab->elf.dynobj = abfd;
645 if (!create_got_section (htab->elf.dynobj, info))
654 /* This symbol requires a procedure linkage table entry. We
655 actually build the entry in adjust_dynamic_symbol,
656 because this might be a case of linking PIC code which is
657 never referenced by a dynamic object, in which case we
658 don't need to generate a procedure linkage table entry
661 /* If this is a local symbol, we resolve it directly without
662 creating a procedure linkage table entry. */
666 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
667 h->plt.refcount += 1;
679 if (h != NULL && !info->shared)
681 /* If this reloc is in a read-only section, we might
682 need a copy reloc. We can't check reliably at this
683 stage whether the section is read-only, as input
684 sections have not yet been mapped to output sections.
685 Tentatively set the flag for now, and correct in
686 adjust_dynamic_symbol. */
687 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
689 /* We may need a .plt entry if the function this reloc
690 refers to is in a shared lib. */
691 h->plt.refcount += 1;
694 /* If we are creating a shared library, and this is a reloc
695 against a global symbol, or a non PC relative reloc
696 against a local symbol, then we need to copy the reloc
697 into the shared library. However, if we are linking with
698 -Bsymbolic, we do not need to copy a reloc against a
699 global symbol which is defined in an object we are
700 including in the link (i.e., DEF_REGULAR is set). At
701 this point we have not seen all the input files, so it is
702 possible that DEF_REGULAR is not set now but will be set
703 later (it is never cleared). In case of a weak definition,
704 DEF_REGULAR may be cleared later by a strong definition in
705 a shared library. We account for that possibility below by
706 storing information in the relocs_copied field of the hash
707 table entry. A similar situation occurs when creating
708 shared libraries and symbol visibility changes render the
711 If on the other hand, we are creating an executable, we
712 may need to keep relocations for symbols satisfied by a
713 dynamic library if we manage to avoid copy relocs for the
716 && (sec->flags & SEC_ALLOC) != 0
717 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
718 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
719 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
720 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
721 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
724 || h->root.type == bfd_link_hash_defweak
725 || (h->elf_link_hash_flags
726 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
728 && (sec->flags & SEC_ALLOC) != 0
730 && (h->root.type == bfd_link_hash_defweak
731 || (h->elf_link_hash_flags
732 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
734 struct elf_s390_dyn_relocs *p;
735 struct elf_s390_dyn_relocs **head;
737 /* We must copy these reloc types into the output file.
738 Create a reloc section in dynobj and make room for
745 name = (bfd_elf_string_from_elf_section
747 elf_elfheader (abfd)->e_shstrndx,
748 elf_section_data (sec)->rel_hdr.sh_name));
752 if (strncmp (name, ".rela", 5) != 0
753 || strcmp (bfd_get_section_name (abfd, sec),
756 (*_bfd_error_handler)
757 (_("%s: bad relocation section name `%s\'"),
758 bfd_archive_filename (abfd), name);
761 if (htab->elf.dynobj == NULL)
762 htab->elf.dynobj = abfd;
764 dynobj = htab->elf.dynobj;
765 sreloc = bfd_get_section_by_name (dynobj, name);
770 sreloc = bfd_make_section (dynobj, name);
771 flags = (SEC_HAS_CONTENTS | SEC_READONLY
772 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
773 if ((sec->flags & SEC_ALLOC) != 0)
774 flags |= SEC_ALLOC | SEC_LOAD;
776 || ! bfd_set_section_flags (dynobj, sreloc, flags)
777 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
780 elf_section_data (sec)->sreloc = sreloc;
783 /* If this is a global symbol, we count the number of
784 relocations we need for this symbol. */
787 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
791 /* Track dynamic relocs needed for local syms too.
792 We really need local syms available to do this
796 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
801 head = ((struct elf_s390_dyn_relocs **)
802 &elf_section_data (s)->local_dynrel);
806 if (p == NULL || p->sec != sec)
808 bfd_size_type amt = sizeof *p;
809 p = ((struct elf_s390_dyn_relocs *)
810 bfd_alloc (htab->elf.dynobj, amt));
821 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
822 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
823 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
824 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
825 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
830 /* This relocation describes the C++ object vtable hierarchy.
831 Reconstruct it for later use during GC. */
832 case R_390_GNU_VTINHERIT:
833 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
837 /* This relocation describes which C++ vtable entries are actually
838 used. Record for later use during GC. */
839 case R_390_GNU_VTENTRY:
840 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
852 /* Return the section that should be marked against GC for a given
856 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
858 struct bfd_link_info *info ATTRIBUTE_UNUSED;
859 Elf_Internal_Rela *rel;
860 struct elf_link_hash_entry *h;
861 Elf_Internal_Sym *sym;
865 switch (ELF64_R_TYPE (rel->r_info))
867 case R_390_GNU_VTINHERIT:
868 case R_390_GNU_VTENTRY:
872 switch (h->root.type)
874 case bfd_link_hash_defined:
875 case bfd_link_hash_defweak:
876 return h->root.u.def.section;
878 case bfd_link_hash_common:
879 return h->root.u.c.p->section;
887 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
892 /* Update the got entry reference counts for the section being removed. */
895 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
897 struct bfd_link_info *info;
899 const Elf_Internal_Rela *relocs;
901 Elf_Internal_Shdr *symtab_hdr;
902 struct elf_link_hash_entry **sym_hashes;
903 bfd_signed_vma *local_got_refcounts;
904 const Elf_Internal_Rela *rel, *relend;
905 unsigned long r_symndx;
906 struct elf_link_hash_entry *h;
908 elf_section_data (sec)->local_dynrel = NULL;
910 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
911 sym_hashes = elf_sym_hashes (abfd);
912 local_got_refcounts = elf_local_got_refcounts (abfd);
914 relend = relocs + sec->reloc_count;
915 for (rel = relocs; rel < relend; rel++)
916 switch (ELF64_R_TYPE (rel->r_info))
926 r_symndx = ELF64_R_SYM (rel->r_info);
927 if (r_symndx >= symtab_hdr->sh_info)
929 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
930 if (h->got.refcount > 0)
931 h->got.refcount -= 1;
933 else if (local_got_refcounts != NULL)
935 if (local_got_refcounts[r_symndx] > 0)
936 local_got_refcounts[r_symndx] -= 1;
950 r_symndx = ELF64_R_SYM (rel->r_info);
951 if (r_symndx >= symtab_hdr->sh_info)
953 struct elf_s390_link_hash_entry *eh;
954 struct elf_s390_dyn_relocs **pp;
955 struct elf_s390_dyn_relocs *p;
957 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
959 if (!info->shared && h->plt.refcount > 0)
960 h->plt.refcount -= 1;
962 eh = (struct elf_s390_link_hash_entry *) h;
964 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
967 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
968 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
969 || ELF64_R_TYPE (rel->r_info) == R_390_PC32)
983 r_symndx = ELF64_R_SYM (rel->r_info);
984 if (r_symndx >= symtab_hdr->sh_info)
986 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
987 if (h->plt.refcount > 0)
988 h->plt.refcount -= 1;
999 /* Adjust a symbol defined by a dynamic object and referenced by a
1000 regular object. The current definition is in some section of the
1001 dynamic object, but we're not including those sections. We have to
1002 change the definition to something the rest of the link can
1006 elf_s390_adjust_dynamic_symbol (info, h)
1007 struct bfd_link_info *info;
1008 struct elf_link_hash_entry *h;
1010 struct elf_s390_link_hash_table *htab;
1011 struct elf_s390_link_hash_entry * eh;
1012 struct elf_s390_dyn_relocs *p;
1014 unsigned int power_of_two;
1016 /* If this is a function, put it in the procedure linkage table. We
1017 will fill in the contents of the procedure linkage table later
1018 (although we could actually do it here). */
1019 if (h->type == STT_FUNC
1020 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1022 if (h->plt.refcount <= 0
1024 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
1025 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1026 && h->root.type != bfd_link_hash_undefweak
1027 && h->root.type != bfd_link_hash_undefined))
1029 /* This case can occur if we saw a PLT32 reloc in an input
1030 file, but the symbol was never referred to by a dynamic
1031 object, or if all references were garbage collected. In
1032 such a case, we don't actually need to build a procedure
1033 linkage table, and we can just do a PC32 reloc instead. */
1034 h->plt.offset = (bfd_vma) -1;
1035 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1041 /* It's possible that we incorrectly decided a .plt reloc was
1042 needed for an R_390_PC32 reloc to a non-function sym in
1043 check_relocs. We can't decide accurately between function and
1044 non-function syms in check-relocs; Objects loaded later in
1045 the link may change h->type. So fix it now. */
1046 h->plt.offset = (bfd_vma) -1;
1048 /* If this is a weak symbol, and there is a real definition, the
1049 processor independent code will have arranged for us to see the
1050 real definition first, and we can just use the same value. */
1051 if (h->weakdef != NULL)
1053 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1054 || h->weakdef->root.type == bfd_link_hash_defweak);
1055 h->root.u.def.section = h->weakdef->root.u.def.section;
1056 h->root.u.def.value = h->weakdef->root.u.def.value;
1060 /* This is a reference to a symbol defined by a dynamic object which
1061 is not a function. */
1063 /* If we are creating a shared library, we must presume that the
1064 only references to the symbol are via the global offset table.
1065 For such cases we need not do anything here; the relocations will
1066 be handled correctly by relocate_section. */
1070 /* If there are no references to this symbol that do not use the
1071 GOT, we don't need to generate a copy reloc. */
1072 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1075 /* If -z nocopyreloc was given, we won't generate them either. */
1076 if (info->nocopyreloc)
1078 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1082 eh = (struct elf_s390_link_hash_entry *) h;
1083 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1085 s = p->sec->output_section;
1086 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1090 /* If we didn't find any dynamic relocs in read-only sections, then
1091 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1094 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1098 /* We must allocate the symbol in our .dynbss section, which will
1099 become part of the .bss section of the executable. There will be
1100 an entry for this symbol in the .dynsym section. The dynamic
1101 object will contain position independent code, so all references
1102 from the dynamic object to this symbol will go through the global
1103 offset table. The dynamic linker will use the .dynsym entry to
1104 determine the address it must put in the global offset table, so
1105 both the dynamic object and the regular object will refer to the
1106 same memory location for the variable. */
1108 htab = elf_s390_hash_table (info);
1110 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1111 copy the initial value out of the dynamic object and into the
1112 runtime process image. */
1113 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1115 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
1116 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1119 /* We need to figure out the alignment required for this symbol. I
1120 have no idea how ELF linkers handle this. */
1121 power_of_two = bfd_log2 (h->size);
1122 if (power_of_two > 3)
1125 /* Apply the required alignment. */
1127 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1128 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1130 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1134 /* Define the symbol as being at this point in the section. */
1135 h->root.u.def.section = s;
1136 h->root.u.def.value = s->_raw_size;
1138 /* Increment the section size to make room for the symbol. */
1139 s->_raw_size += h->size;
1144 /* This is the condition under which elf_s390_finish_dynamic_symbol
1145 will be called from elflink.h. If elflink.h doesn't call our
1146 finish_dynamic_symbol routine, we'll need to do something about
1147 initializing any .plt and .got entries in elf_s390_relocate_section. */
1148 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1150 && ((INFO)->shared \
1151 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1152 && ((H)->dynindx != -1 \
1153 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1155 /* Allocate space in .plt, .got and associated reloc sections for
1159 allocate_dynrelocs (h, inf)
1160 struct elf_link_hash_entry *h;
1163 struct bfd_link_info *info;
1164 struct elf_s390_link_hash_table *htab;
1165 struct elf_s390_link_hash_entry *eh;
1166 struct elf_s390_dyn_relocs *p;
1168 if (h->root.type == bfd_link_hash_indirect)
1171 if (h->root.type == bfd_link_hash_warning)
1172 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1174 info = (struct bfd_link_info *) inf;
1175 htab = elf_s390_hash_table (info);
1177 if (htab->elf.dynamic_sections_created
1178 && h->plt.refcount > 0)
1180 /* Make sure this symbol is output as a dynamic symbol.
1181 Undefined weak syms won't yet be marked as dynamic. */
1182 if (h->dynindx == -1
1183 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1185 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1189 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
1191 asection *s = htab->splt;
1193 /* If this is the first .plt entry, make room for the special
1195 if (s->_raw_size == 0)
1196 s->_raw_size += PLT_FIRST_ENTRY_SIZE;
1198 h->plt.offset = s->_raw_size;
1200 /* If this symbol is not defined in a regular file, and we are
1201 not generating a shared library, then set the symbol to this
1202 location in the .plt. This is required to make function
1203 pointers compare as equal between the normal executable and
1204 the shared library. */
1206 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1208 h->root.u.def.section = s;
1209 h->root.u.def.value = h->plt.offset;
1212 /* Make room for this entry. */
1213 s->_raw_size += PLT_ENTRY_SIZE;
1215 /* We also need to make an entry in the .got.plt section, which
1216 will be placed in the .got section by the linker script. */
1217 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1219 /* We also need to make an entry in the .rela.plt section. */
1220 htab->srelplt->_raw_size += sizeof (Elf64_External_Rela);
1224 h->plt.offset = (bfd_vma) -1;
1225 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1230 h->plt.offset = (bfd_vma) -1;
1231 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1234 if (h->got.refcount > 0)
1239 /* Make sure this symbol is output as a dynamic symbol.
1240 Undefined weak syms won't yet be marked as dynamic. */
1241 if (h->dynindx == -1
1242 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1244 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1249 h->got.offset = s->_raw_size;
1250 s->_raw_size += GOT_ENTRY_SIZE;
1251 dyn = htab->elf.dynamic_sections_created;
1252 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
1253 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1256 h->got.offset = (bfd_vma) -1;
1258 eh = (struct elf_s390_link_hash_entry *) h;
1259 if (eh->dyn_relocs == NULL)
1262 /* In the shared -Bsymbolic case, discard space allocated for
1263 dynamic pc-relative relocs against symbols which turn out to be
1264 defined in regular objects. For the normal shared case, discard
1265 space for pc-relative relocs that have become local due to symbol
1266 visibility changes. */
1270 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1271 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1274 struct elf_s390_dyn_relocs **pp;
1276 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1278 p->count -= p->pc_count;
1289 /* For the non-shared case, discard space for relocs against
1290 symbols which turn out to need copy relocs or are not
1293 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1294 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1295 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1296 || (htab->elf.dynamic_sections_created
1297 && (h->root.type == bfd_link_hash_undefweak
1298 || h->root.type == bfd_link_hash_undefined))))
1300 /* Make sure this symbol is output as a dynamic symbol.
1301 Undefined weak syms won't yet be marked as dynamic. */
1302 if (h->dynindx == -1
1303 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1305 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
1309 /* If that succeeded, we know we'll be keeping all the
1311 if (h->dynindx != -1)
1315 eh->dyn_relocs = NULL;
1320 /* Finally, allocate space. */
1321 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1323 asection *sreloc = elf_section_data (p->sec)->sreloc;
1324 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
1330 /* Find any dynamic relocs that apply to read-only sections. */
1333 readonly_dynrelocs (h, inf)
1334 struct elf_link_hash_entry *h;
1337 struct elf_s390_link_hash_entry *eh;
1338 struct elf_s390_dyn_relocs *p;
1340 if (h->root.type == bfd_link_hash_warning)
1341 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1343 eh = (struct elf_s390_link_hash_entry *) h;
1344 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1346 asection *s = p->sec->output_section;
1348 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1350 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1352 info->flags |= DF_TEXTREL;
1354 /* Not an error, just cut short the traversal. */
1361 /* Set the sizes of the dynamic sections. */
1364 elf_s390_size_dynamic_sections (output_bfd, info)
1365 bfd *output_bfd ATTRIBUTE_UNUSED;
1366 struct bfd_link_info *info;
1368 struct elf_s390_link_hash_table *htab;
1374 htab = elf_s390_hash_table (info);
1375 dynobj = htab->elf.dynobj;
1379 if (htab->elf.dynamic_sections_created)
1381 /* Set the contents of the .interp section to the interpreter. */
1384 s = bfd_get_section_by_name (dynobj, ".interp");
1387 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1388 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1392 /* Set up .got offsets for local syms, and space for local dynamic
1394 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1396 bfd_signed_vma *local_got;
1397 bfd_signed_vma *end_local_got;
1398 bfd_size_type locsymcount;
1399 Elf_Internal_Shdr *symtab_hdr;
1402 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1405 for (s = ibfd->sections; s != NULL; s = s->next)
1407 struct elf_s390_dyn_relocs *p;
1409 for (p = *((struct elf_s390_dyn_relocs **)
1410 &elf_section_data (s)->local_dynrel);
1414 if (!bfd_is_abs_section (p->sec)
1415 && bfd_is_abs_section (p->sec->output_section))
1417 /* Input section has been discarded, either because
1418 it is a copy of a linkonce section or due to
1419 linker script /DISCARD/, so we'll be discarding
1422 else if (p->count != 0)
1424 srela = elf_section_data (p->sec)->sreloc;
1425 srela->_raw_size += p->count * sizeof (Elf64_External_Rela);
1426 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1427 info->flags |= DF_TEXTREL;
1432 local_got = elf_local_got_refcounts (ibfd);
1436 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1437 locsymcount = symtab_hdr->sh_info;
1438 end_local_got = local_got + locsymcount;
1440 srela = htab->srelgot;
1441 for (; local_got < end_local_got; ++local_got)
1445 *local_got = s->_raw_size;
1446 s->_raw_size += GOT_ENTRY_SIZE;
1448 srela->_raw_size += sizeof (Elf64_External_Rela);
1451 *local_got = (bfd_vma) -1;
1455 /* Allocate global sym .plt and .got entries, and space for global
1456 sym dynamic relocs. */
1457 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1459 /* We now have determined the sizes of the various dynamic sections.
1460 Allocate memory for them. */
1462 for (s = dynobj->sections; s != NULL; s = s->next)
1464 if ((s->flags & SEC_LINKER_CREATED) == 0)
1469 || s == htab->sgotplt)
1471 /* Strip this section if we don't need it; see the
1474 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
1476 if (s->_raw_size != 0 && s != htab->srelplt)
1479 /* We use the reloc_count field as a counter if we need
1480 to copy relocs into the output file. */
1485 /* It's not one of our sections, so don't allocate space. */
1489 if (s->_raw_size == 0)
1491 /* If we don't need this section, strip it from the
1492 output file. This is to handle .rela.bss and
1493 .rela.plt. We must create it in
1494 create_dynamic_sections, because it must be created
1495 before the linker maps input sections to output
1496 sections. The linker does that before
1497 adjust_dynamic_symbol is called, and it is that
1498 function which decides whether anything needs to go
1499 into these sections. */
1501 _bfd_strip_section_from_output (info, s);
1505 /* Allocate memory for the section contents. We use bfd_zalloc
1506 here in case unused entries are not reclaimed before the
1507 section's contents are written out. This should not happen,
1508 but this way if it does, we get a R_390_NONE reloc instead
1510 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1511 if (s->contents == NULL)
1515 if (htab->elf.dynamic_sections_created)
1517 /* Add some entries to the .dynamic section. We fill in the
1518 values later, in elf_s390_finish_dynamic_sections, but we
1519 must add the entries now so that we get the correct size for
1520 the .dynamic section. The DT_DEBUG entry is filled in by the
1521 dynamic linker and used by the debugger. */
1522 #define add_dynamic_entry(TAG, VAL) \
1523 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1527 if (!add_dynamic_entry (DT_DEBUG, 0))
1531 if (htab->splt->_raw_size != 0)
1533 if (!add_dynamic_entry (DT_PLTGOT, 0)
1534 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1535 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1536 || !add_dynamic_entry (DT_JMPREL, 0))
1542 if (!add_dynamic_entry (DT_RELA, 0)
1543 || !add_dynamic_entry (DT_RELASZ, 0)
1544 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
1547 /* If any dynamic relocs apply to a read-only section,
1548 then we need a DT_TEXTREL entry. */
1549 if ((info->flags & DF_TEXTREL) == 0)
1550 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1553 if ((info->flags & DF_TEXTREL) != 0)
1555 if (!add_dynamic_entry (DT_TEXTREL, 0))
1560 #undef add_dynamic_entry
1565 /* Relocate a 390 ELF section. */
1568 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
1569 contents, relocs, local_syms, local_sections)
1571 struct bfd_link_info *info;
1573 asection *input_section;
1575 Elf_Internal_Rela *relocs;
1576 Elf_Internal_Sym *local_syms;
1577 asection **local_sections;
1579 struct elf_s390_link_hash_table *htab;
1580 Elf_Internal_Shdr *symtab_hdr;
1581 struct elf_link_hash_entry **sym_hashes;
1582 bfd_vma *local_got_offsets;
1583 Elf_Internal_Rela *rel;
1584 Elf_Internal_Rela *relend;
1586 if (info->relocateable)
1589 htab = elf_s390_hash_table (info);
1590 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1591 sym_hashes = elf_sym_hashes (input_bfd);
1592 local_got_offsets = elf_local_got_offsets (input_bfd);
1595 relend = relocs + input_section->reloc_count;
1596 for (; rel < relend; rel++)
1599 reloc_howto_type *howto;
1600 unsigned long r_symndx;
1601 struct elf_link_hash_entry *h;
1602 Elf_Internal_Sym *sym;
1606 boolean unresolved_reloc;
1607 bfd_reloc_status_type r;
1609 r_type = ELF64_R_TYPE (rel->r_info);
1610 if (r_type == (int) R_390_GNU_VTINHERIT
1611 || r_type == (int) R_390_GNU_VTENTRY)
1613 if (r_type < 0 || r_type >= (int) R_390_max)
1615 bfd_set_error (bfd_error_bad_value);
1619 howto = elf_howto_table + r_type;
1620 r_symndx = ELF64_R_SYM (rel->r_info);
1624 unresolved_reloc = false;
1625 if (r_symndx < symtab_hdr->sh_info)
1627 sym = local_syms + r_symndx;
1628 sec = local_sections[r_symndx];
1629 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1633 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1634 while (h->root.type == bfd_link_hash_indirect
1635 || h->root.type == bfd_link_hash_warning)
1636 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1638 if (h->root.type == bfd_link_hash_defined
1639 || h->root.type == bfd_link_hash_defweak)
1641 sec = h->root.u.def.section;
1642 if (sec->output_section == NULL)
1644 /* Set a flag that will be cleared later if we find a
1645 relocation value for this symbol. output_section
1646 is typically NULL for symbols satisfied by a shared
1648 unresolved_reloc = true;
1652 relocation = (h->root.u.def.value
1653 + sec->output_section->vma
1654 + sec->output_offset);
1656 else if (h->root.type == bfd_link_hash_undefweak)
1658 else if (info->shared
1659 && (!info->symbolic || info->allow_shlib_undefined)
1660 && !info->no_undefined
1661 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1665 if (! ((*info->callbacks->undefined_symbol)
1666 (info, h->root.root.string, input_bfd,
1667 input_section, rel->r_offset,
1668 (!info->shared || info->no_undefined
1669 || ELF_ST_VISIBILITY (h->other)))))
1682 /* Relocation is to the entry for this symbol in the global
1684 if (htab->sgot == NULL)
1691 off = h->got.offset;
1692 dyn = htab->elf.dynamic_sections_created;
1693 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
1697 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
1698 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1700 /* This is actually a static link, or it is a
1701 -Bsymbolic link and the symbol is defined
1702 locally, or the symbol was forced to be local
1703 because of a version file. We must initialize
1704 this entry in the global offset table. Since the
1705 offset must always be a multiple of 2, we use the
1706 least significant bit to record whether we have
1707 initialized it already.
1709 When doing a dynamic link, we create a .rel.got
1710 relocation entry to initialize the value. This
1711 is done in the finish_dynamic_symbol routine. */
1716 bfd_put_64 (output_bfd, relocation,
1717 htab->sgot->contents + off);
1722 unresolved_reloc = false;
1726 if (local_got_offsets == NULL)
1729 off = local_got_offsets[r_symndx];
1731 /* The offset must always be a multiple of 8. We use
1732 the least significant bit to record whether we have
1733 already generated the necessary reloc. */
1738 bfd_put_64 (output_bfd, relocation,
1739 htab->sgot->contents + off);
1744 Elf_Internal_Rela outrel;
1745 Elf64_External_Rela *loc;
1747 srelgot = htab->srelgot;
1748 if (srelgot == NULL)
1751 outrel.r_offset = (htab->sgot->output_section->vma
1752 + htab->sgot->output_offset
1754 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
1755 outrel.r_addend = relocation;
1756 loc = (Elf64_External_Rela *) srelgot->contents;
1757 loc += srelgot->reloc_count++;
1758 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
1761 local_got_offsets[r_symndx] |= 1;
1765 if (off >= (bfd_vma) -2)
1768 relocation = htab->sgot->output_offset + off;
1771 * For @GOTENT the relocation is against the offset between
1772 * the instruction and the symbols entry in the GOT and not
1773 * between the start of the GOT and the symbols entry. We
1774 * add the vma of the GOT to get the correct value.
1776 if (r_type == R_390_GOTENT)
1777 relocation += htab->sgot->output_section->vma;
1782 /* Relocation is relative to the start of the global offset
1785 /* Note that sgot->output_offset is not involved in this
1786 calculation. We always want the start of .got. If we
1787 defined _GLOBAL_OFFSET_TABLE in a different way, as is
1788 permitted by the ABI, we might have to change this
1790 relocation -= htab->sgot->output_section->vma;
1795 case R_390_GOTPCDBL:
1796 /* Use global offset table as symbol value. */
1797 relocation = htab->sgot->output_section->vma;
1798 unresolved_reloc = false;
1801 case R_390_PLT16DBL:
1803 case R_390_PLT32DBL:
1805 /* Relocation is to the entry for this symbol in the
1806 procedure linkage table. */
1808 /* Resolve a PLT32 reloc against a local symbol directly,
1809 without using the procedure linkage table. */
1813 if (h->plt.offset == (bfd_vma) -1
1814 || htab->splt == NULL)
1816 /* We didn't make a PLT entry for this symbol. This
1817 happens when statically linking PIC code, or when
1818 using -Bsymbolic. */
1822 relocation = (htab->splt->output_section->vma
1823 + htab->splt->output_offset
1825 unresolved_reloc = false;
1837 /* r_symndx will be zero only for relocs against symbols
1838 from removed linkonce sections, or sections discarded by
1841 || (input_section->flags & SEC_ALLOC) == 0)
1845 && ((r_type != R_390_PC16
1846 && r_type != R_390_PC16DBL
1847 && r_type != R_390_PC32
1848 && r_type != R_390_PC32DBL
1849 && r_type != R_390_PC64)
1852 && (! info->symbolic
1853 || (h->elf_link_hash_flags
1854 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1858 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1859 && (((h->elf_link_hash_flags
1860 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1861 && (h->elf_link_hash_flags
1862 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1863 || h->root.type == bfd_link_hash_undefweak
1864 || h->root.type == bfd_link_hash_undefined)))
1866 Elf_Internal_Rela outrel;
1867 boolean skip, relocate;
1869 Elf64_External_Rela *loc;
1871 /* When generating a shared object, these relocations
1872 are copied into the output file to be resolved at run
1879 _bfd_elf_section_offset (output_bfd, info, input_section,
1881 if (outrel.r_offset == (bfd_vma) -1)
1883 else if (outrel.r_offset == (bfd_vma) -2)
1884 skip = true, relocate = true;
1886 outrel.r_offset += (input_section->output_section->vma
1887 + input_section->output_offset);
1890 memset (&outrel, 0, sizeof outrel);
1893 && (r_type == R_390_PC16
1894 || r_type == R_390_PC16DBL
1895 || r_type == R_390_PC32
1896 || r_type == R_390_PC32DBL
1897 || r_type == R_390_PC64
1900 || (h->elf_link_hash_flags
1901 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1903 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
1904 outrel.r_addend = rel->r_addend;
1908 /* This symbol is local, or marked to become local. */
1910 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
1911 outrel.r_addend = relocation + rel->r_addend;
1914 sreloc = elf_section_data (input_section)->sreloc;
1918 loc = (Elf64_External_Rela *) sreloc->contents;
1919 loc += sreloc->reloc_count++;
1920 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
1922 /* If this reloc is against an external symbol, we do
1923 not want to fiddle with the addend. Otherwise, we
1924 need to include the symbol value so that it becomes
1925 an addend for the dynamic reloc. */
1936 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1937 because such sections are not SEC_ALLOC and thus ld.so will
1938 not process them. */
1939 if (unresolved_reloc
1940 && !((input_section->flags & SEC_DEBUGGING) != 0
1941 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
1942 (*_bfd_error_handler)
1943 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
1944 bfd_archive_filename (input_bfd),
1945 bfd_get_section_name (input_bfd, input_section),
1946 (long) rel->r_offset,
1947 h->root.root.string);
1949 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1950 contents, rel->r_offset,
1951 relocation, rel->r_addend);
1953 if (r != bfd_reloc_ok)
1958 name = h->root.root.string;
1961 name = bfd_elf_string_from_elf_section (input_bfd,
1962 symtab_hdr->sh_link,
1967 name = bfd_section_name (input_bfd, sec);
1970 if (r == bfd_reloc_overflow)
1973 if (! ((*info->callbacks->reloc_overflow)
1974 (info, name, howto->name, (bfd_vma) 0,
1975 input_bfd, input_section, rel->r_offset)))
1980 (*_bfd_error_handler)
1981 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
1982 bfd_archive_filename (input_bfd),
1983 bfd_get_section_name (input_bfd, input_section),
1984 (long) rel->r_offset, name, (int) r);
1993 /* Finish up dynamic symbol handling. We set the contents of various
1994 dynamic sections here. */
1997 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
1999 struct bfd_link_info *info;
2000 struct elf_link_hash_entry *h;
2001 Elf_Internal_Sym *sym;
2003 struct elf_s390_link_hash_table *htab;
2005 htab = elf_s390_hash_table (info);
2007 if (h->plt.offset != (bfd_vma) -1)
2011 Elf_Internal_Rela rela;
2012 Elf64_External_Rela *loc;
2014 /* This symbol has an entry in the procedure linkage table. Set
2017 if (h->dynindx == -1
2018 || htab->splt == NULL
2019 || htab->sgotplt == NULL
2020 || htab->srelplt == NULL)
2024 Current offset - size first entry / entry size. */
2025 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
2027 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
2029 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
2031 /* Fill in the blueprint of a PLT. */
2032 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
2033 htab->splt->contents + h->plt.offset);
2034 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
2035 htab->splt->contents + h->plt.offset + 4);
2036 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
2037 htab->splt->contents + h->plt.offset + 8);
2038 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
2039 htab->splt->contents + h->plt.offset + 12);
2040 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
2041 htab->splt->contents + h->plt.offset + 16);
2042 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
2043 htab->splt->contents + h->plt.offset + 20);
2044 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
2045 htab->splt->contents + h->plt.offset + 24);
2046 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
2047 htab->splt->contents + h->plt.offset + 28);
2048 /* Fixup the relative address to the GOT entry */
2049 bfd_put_32 (output_bfd,
2050 (htab->sgotplt->output_section->vma +
2051 htab->sgotplt->output_offset + got_offset
2052 - (htab->splt->output_section->vma + h->plt.offset))/2,
2053 htab->splt->contents + h->plt.offset + 2);
2054 /* Fixup the relative branch to PLT 0 */
2055 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
2056 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
2057 htab->splt->contents + h->plt.offset + 24);
2058 /* Fixup offset into symbol table */
2059 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
2060 htab->splt->contents + h->plt.offset + 28);
2062 /* Fill in the entry in the global offset table.
2063 Points to instruction after GOT offset. */
2064 bfd_put_64 (output_bfd,
2065 (htab->splt->output_section->vma
2066 + htab->splt->output_offset
2069 htab->sgotplt->contents + got_offset);
2071 /* Fill in the entry in the .rela.plt section. */
2072 rela.r_offset = (htab->sgotplt->output_section->vma
2073 + htab->sgotplt->output_offset
2075 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
2077 loc = (Elf64_External_Rela *) htab->srelplt->contents + plt_index;
2078 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
2080 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2082 /* Mark the symbol as undefined, rather than as defined in
2083 the .plt section. Leave the value alone. This is a clue
2084 for the dynamic linker, to make function pointer
2085 comparisons work between an application and shared
2087 sym->st_shndx = SHN_UNDEF;
2091 if (h->got.offset != (bfd_vma) -1)
2093 Elf_Internal_Rela rela;
2094 Elf64_External_Rela *loc;
2096 /* This symbol has an entry in the global offset table. Set it
2099 if (htab->sgot == NULL || htab->srelgot == NULL)
2102 rela.r_offset = (htab->sgot->output_section->vma
2103 + htab->sgot->output_offset
2104 + (h->got.offset &~ (bfd_vma) 1));
2106 /* If this is a static link, or it is a -Bsymbolic link and the
2107 symbol is defined locally or was forced to be local because
2108 of a version file, we just want to emit a RELATIVE reloc.
2109 The entry in the global offset table will already have been
2110 initialized in the relocate_section function. */
2114 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2115 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2117 BFD_ASSERT((h->got.offset & 1) != 0);
2118 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2119 rela.r_addend = (h->root.u.def.value
2120 + h->root.u.def.section->output_section->vma
2121 + h->root.u.def.section->output_offset);
2125 BFD_ASSERT((h->got.offset & 1) == 0);
2126 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
2127 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
2131 loc = (Elf64_External_Rela *) htab->srelgot->contents;
2132 loc += htab->srelgot->reloc_count++;
2133 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
2136 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2138 Elf_Internal_Rela rela;
2139 Elf64_External_Rela *loc;
2141 /* This symbols needs a copy reloc. Set it up. */
2143 if (h->dynindx == -1
2144 || (h->root.type != bfd_link_hash_defined
2145 && h->root.type != bfd_link_hash_defweak)
2146 || htab->srelbss == NULL)
2149 rela.r_offset = (h->root.u.def.value
2150 + h->root.u.def.section->output_section->vma
2151 + h->root.u.def.section->output_offset);
2152 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
2154 loc = (Elf64_External_Rela *) htab->srelbss->contents;
2155 loc += htab->srelbss->reloc_count++;
2156 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
2159 /* Mark some specially defined symbols as absolute. */
2160 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2161 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2162 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2163 sym->st_shndx = SHN_ABS;
2168 /* Used to decide how to sort relocs in an optimal manner for the
2169 dynamic linker, before writing them out. */
2171 static enum elf_reloc_type_class
2172 elf_s390_reloc_type_class (rela)
2173 const Elf_Internal_Rela *rela;
2175 switch ((int) ELF64_R_TYPE (rela->r_info))
2177 case R_390_RELATIVE:
2178 return reloc_class_relative;
2179 case R_390_JMP_SLOT:
2180 return reloc_class_plt;
2182 return reloc_class_copy;
2184 return reloc_class_normal;
2188 /* Finish up the dynamic sections. */
2191 elf_s390_finish_dynamic_sections (output_bfd, info)
2193 struct bfd_link_info *info;
2195 struct elf_s390_link_hash_table *htab;
2199 htab = elf_s390_hash_table (info);
2200 dynobj = htab->elf.dynobj;
2201 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2203 if (htab->elf.dynamic_sections_created)
2205 Elf64_External_Dyn *dyncon, *dynconend;
2207 if (sdyn == NULL || htab->sgot == NULL)
2210 dyncon = (Elf64_External_Dyn *) sdyn->contents;
2211 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2212 for (; dyncon < dynconend; dyncon++)
2214 Elf_Internal_Dyn dyn;
2217 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
2225 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
2229 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
2233 s = htab->srelplt->output_section;
2234 if (s->_cooked_size != 0)
2235 dyn.d_un.d_val = s->_cooked_size;
2237 dyn.d_un.d_val = s->_raw_size;
2241 /* The procedure linkage table relocs (DT_JMPREL) should
2242 not be included in the overall relocs (DT_RELA).
2243 Therefore, we override the DT_RELASZ entry here to
2244 make it not include the JMPREL relocs. Since the
2245 linker script arranges for .rela.plt to follow all
2246 other relocation sections, we don't have to worry
2247 about changing the DT_RELA entry. */
2248 s = htab->srelplt->output_section;
2249 if (s->_cooked_size != 0)
2250 dyn.d_un.d_val -= s->_cooked_size;
2252 dyn.d_un.d_val -= s->_raw_size;
2256 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2259 /* Fill in the special first entry in the procedure linkage table. */
2260 if (htab->splt && htab->splt->_raw_size > 0)
2262 /* fill in blueprint for plt 0 entry */
2263 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
2264 htab->splt->contents );
2265 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
2266 htab->splt->contents +4 );
2267 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
2268 htab->splt->contents +12 );
2269 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
2270 htab->splt->contents +16 );
2271 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
2272 htab->splt->contents +20 );
2273 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
2274 htab->splt->contents + 24);
2275 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
2276 htab->splt->contents + 28 );
2277 /* Fixup relative address to start of GOT */
2278 bfd_put_32 (output_bfd,
2279 (htab->sgotplt->output_section->vma +
2280 htab->sgotplt->output_offset
2281 - htab->splt->output_section->vma - 6)/2,
2282 htab->splt->contents + 8);
2284 elf_section_data (htab->splt->output_section)
2285 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
2290 /* Fill in the first three entries in the global offset table. */
2291 if (htab->sgotplt->_raw_size > 0)
2293 bfd_put_64 (output_bfd,
2294 (sdyn == NULL ? (bfd_vma) 0
2295 : sdyn->output_section->vma + sdyn->output_offset),
2296 htab->sgotplt->contents);
2297 /* One entry for shared object struct ptr. */
2298 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
2299 /* One entry for _dl_runtime_resolve. */
2300 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
2303 elf_section_data (htab->sgot->output_section)
2304 ->this_hdr.sh_entsize = 8;
2310 elf_s390_object_p (abfd)
2313 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
2317 * Why was the hash table entry size definition changed from
2318 * ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
2319 * this is the only reason for the s390_elf64_size_info structure.
2322 const struct elf_size_info s390_elf64_size_info =
2324 sizeof (Elf64_External_Ehdr),
2325 sizeof (Elf64_External_Phdr),
2326 sizeof (Elf64_External_Shdr),
2327 sizeof (Elf64_External_Rel),
2328 sizeof (Elf64_External_Rela),
2329 sizeof (Elf64_External_Sym),
2330 sizeof (Elf64_External_Dyn),
2331 sizeof (Elf_External_Note),
2332 8, /* hash-table entry size */
2333 1, /* internal relocations per external relocations */
2336 ELFCLASS64, EV_CURRENT,
2337 bfd_elf64_write_out_phdrs,
2338 bfd_elf64_write_shdrs_and_ehdr,
2339 bfd_elf64_write_relocs,
2340 bfd_elf64_swap_symbol_in,
2341 bfd_elf64_swap_symbol_out,
2342 bfd_elf64_slurp_reloc_table,
2343 bfd_elf64_slurp_symbol_table,
2344 bfd_elf64_swap_dyn_in,
2345 bfd_elf64_swap_dyn_out,
2352 #define TARGET_BIG_SYM bfd_elf64_s390_vec
2353 #define TARGET_BIG_NAME "elf64-s390"
2354 #define ELF_ARCH bfd_arch_s390
2355 #define ELF_MACHINE_CODE EM_S390
2356 #define ELF_MACHINE_ALT1 EM_S390_OLD
2357 #define ELF_MAXPAGESIZE 0x1000
2359 #define elf_backend_size_info s390_elf64_size_info
2361 #define elf_backend_can_gc_sections 1
2362 #define elf_backend_can_refcount 1
2363 #define elf_backend_want_got_plt 1
2364 #define elf_backend_plt_readonly 1
2365 #define elf_backend_want_plt_sym 0
2366 #define elf_backend_got_header_size 24
2367 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
2368 #define elf_backend_rela_normal 1
2370 #define elf_info_to_howto elf_s390_info_to_howto
2372 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
2373 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
2374 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
2376 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
2377 #define elf_backend_check_relocs elf_s390_check_relocs
2378 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
2379 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
2380 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
2381 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
2382 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
2383 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
2384 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
2385 #define elf_backend_relocate_section elf_s390_relocate_section
2386 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
2387 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
2389 #define elf_backend_object_p elf_s390_object_p
2391 #include "elf64-target.h"