1 /* Motorola 68k series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
29 #include "opcode/m68k.h"
32 elf_m68k_discard_copies (struct elf_link_hash_entry
*, void *);
34 static reloc_howto_type howto_table
[] =
36 HOWTO(R_68K_NONE
, 0, 0, 0, FALSE
,0, complain_overflow_dont
, bfd_elf_generic_reloc
, "R_68K_NONE", FALSE
, 0, 0x00000000,FALSE
),
37 HOWTO(R_68K_32
, 0, 2,32, FALSE
,0, complain_overflow_bitfield
, bfd_elf_generic_reloc
, "R_68K_32", FALSE
, 0, 0xffffffff,FALSE
),
38 HOWTO(R_68K_16
, 0, 1,16, FALSE
,0, complain_overflow_bitfield
, bfd_elf_generic_reloc
, "R_68K_16", FALSE
, 0, 0x0000ffff,FALSE
),
39 HOWTO(R_68K_8
, 0, 0, 8, FALSE
,0, complain_overflow_bitfield
, bfd_elf_generic_reloc
, "R_68K_8", FALSE
, 0, 0x000000ff,FALSE
),
40 HOWTO(R_68K_PC32
, 0, 2,32, TRUE
, 0, complain_overflow_bitfield
, bfd_elf_generic_reloc
, "R_68K_PC32", FALSE
, 0, 0xffffffff,TRUE
),
41 HOWTO(R_68K_PC16
, 0, 1,16, TRUE
, 0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_PC16", FALSE
, 0, 0x0000ffff,TRUE
),
42 HOWTO(R_68K_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_PC8", FALSE
, 0, 0x000000ff,TRUE
),
43 HOWTO(R_68K_GOT32
, 0, 2,32, TRUE
, 0, complain_overflow_bitfield
, bfd_elf_generic_reloc
, "R_68K_GOT32", FALSE
, 0, 0xffffffff,TRUE
),
44 HOWTO(R_68K_GOT16
, 0, 1,16, TRUE
, 0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_GOT16", FALSE
, 0, 0x0000ffff,TRUE
),
45 HOWTO(R_68K_GOT8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_GOT8", FALSE
, 0, 0x000000ff,TRUE
),
46 HOWTO(R_68K_GOT32O
, 0, 2,32, FALSE
,0, complain_overflow_bitfield
, bfd_elf_generic_reloc
, "R_68K_GOT32O", FALSE
, 0, 0xffffffff,FALSE
),
47 HOWTO(R_68K_GOT16O
, 0, 1,16, FALSE
,0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_GOT16O", FALSE
, 0, 0x0000ffff,FALSE
),
48 HOWTO(R_68K_GOT8O
, 0, 0, 8, FALSE
,0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_GOT8O", FALSE
, 0, 0x000000ff,FALSE
),
49 HOWTO(R_68K_PLT32
, 0, 2,32, TRUE
, 0, complain_overflow_bitfield
, bfd_elf_generic_reloc
, "R_68K_PLT32", FALSE
, 0, 0xffffffff,TRUE
),
50 HOWTO(R_68K_PLT16
, 0, 1,16, TRUE
, 0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_PLT16", FALSE
, 0, 0x0000ffff,TRUE
),
51 HOWTO(R_68K_PLT8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_PLT8", FALSE
, 0, 0x000000ff,TRUE
),
52 HOWTO(R_68K_PLT32O
, 0, 2,32, FALSE
,0, complain_overflow_bitfield
, bfd_elf_generic_reloc
, "R_68K_PLT32O", FALSE
, 0, 0xffffffff,FALSE
),
53 HOWTO(R_68K_PLT16O
, 0, 1,16, FALSE
,0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_PLT16O", FALSE
, 0, 0x0000ffff,FALSE
),
54 HOWTO(R_68K_PLT8O
, 0, 0, 8, FALSE
,0, complain_overflow_signed
, bfd_elf_generic_reloc
, "R_68K_PLT8O", FALSE
, 0, 0x000000ff,FALSE
),
55 HOWTO(R_68K_COPY
, 0, 0, 0, FALSE
,0, complain_overflow_dont
, bfd_elf_generic_reloc
, "R_68K_COPY", FALSE
, 0, 0xffffffff,FALSE
),
56 HOWTO(R_68K_GLOB_DAT
, 0, 2,32, FALSE
,0, complain_overflow_dont
, bfd_elf_generic_reloc
, "R_68K_GLOB_DAT", FALSE
, 0, 0xffffffff,FALSE
),
57 HOWTO(R_68K_JMP_SLOT
, 0, 2,32, FALSE
,0, complain_overflow_dont
, bfd_elf_generic_reloc
, "R_68K_JMP_SLOT", FALSE
, 0, 0xffffffff,FALSE
),
58 HOWTO(R_68K_RELATIVE
, 0, 2,32, FALSE
,0, complain_overflow_dont
, bfd_elf_generic_reloc
, "R_68K_RELATIVE", FALSE
, 0, 0xffffffff,FALSE
),
59 /* GNU extension to record C++ vtable hierarchy. */
60 HOWTO (R_68K_GNU_VTINHERIT
, /* type */
62 2, /* size (0 = byte, 1 = short, 2 = long) */
64 FALSE
, /* pc_relative */
66 complain_overflow_dont
, /* complain_on_overflow */
67 NULL
, /* special_function */
68 "R_68K_GNU_VTINHERIT", /* name */
69 FALSE
, /* partial_inplace */
73 /* GNU extension to record C++ vtable member usage. */
74 HOWTO (R_68K_GNU_VTENTRY
, /* type */
76 2, /* size (0 = byte, 1 = short, 2 = long) */
78 FALSE
, /* pc_relative */
80 complain_overflow_dont
, /* complain_on_overflow */
81 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
82 "R_68K_GNU_VTENTRY", /* name */
83 FALSE
, /* partial_inplace */
88 /* TLS general dynamic variable reference. */
89 HOWTO (R_68K_TLS_GD32
, /* type */
91 2, /* size (0 = byte, 1 = short, 2 = long) */
93 FALSE
, /* pc_relative */
95 complain_overflow_bitfield
, /* complain_on_overflow */
96 bfd_elf_generic_reloc
, /* special_function */
97 "R_68K_TLS_GD32", /* name */
98 FALSE
, /* partial_inplace */
100 0xffffffff, /* dst_mask */
101 FALSE
), /* pcrel_offset */
103 HOWTO (R_68K_TLS_GD16
, /* type */
105 1, /* size (0 = byte, 1 = short, 2 = long) */
107 FALSE
, /* pc_relative */
109 complain_overflow_signed
, /* complain_on_overflow */
110 bfd_elf_generic_reloc
, /* special_function */
111 "R_68K_TLS_GD16", /* name */
112 FALSE
, /* partial_inplace */
114 0x0000ffff, /* dst_mask */
115 FALSE
), /* pcrel_offset */
117 HOWTO (R_68K_TLS_GD8
, /* type */
119 0, /* size (0 = byte, 1 = short, 2 = long) */
121 FALSE
, /* pc_relative */
123 complain_overflow_signed
, /* complain_on_overflow */
124 bfd_elf_generic_reloc
, /* special_function */
125 "R_68K_TLS_GD8", /* name */
126 FALSE
, /* partial_inplace */
128 0x000000ff, /* dst_mask */
129 FALSE
), /* pcrel_offset */
131 /* TLS local dynamic variable reference. */
132 HOWTO (R_68K_TLS_LDM32
, /* type */
134 2, /* size (0 = byte, 1 = short, 2 = long) */
136 FALSE
, /* pc_relative */
138 complain_overflow_bitfield
, /* complain_on_overflow */
139 bfd_elf_generic_reloc
, /* special_function */
140 "R_68K_TLS_LDM32", /* name */
141 FALSE
, /* partial_inplace */
143 0xffffffff, /* dst_mask */
144 FALSE
), /* pcrel_offset */
146 HOWTO (R_68K_TLS_LDM16
, /* type */
148 1, /* size (0 = byte, 1 = short, 2 = long) */
150 FALSE
, /* pc_relative */
152 complain_overflow_signed
, /* complain_on_overflow */
153 bfd_elf_generic_reloc
, /* special_function */
154 "R_68K_TLS_LDM16", /* name */
155 FALSE
, /* partial_inplace */
157 0x0000ffff, /* dst_mask */
158 FALSE
), /* pcrel_offset */
160 HOWTO (R_68K_TLS_LDM8
, /* type */
162 0, /* size (0 = byte, 1 = short, 2 = long) */
164 FALSE
, /* pc_relative */
166 complain_overflow_signed
, /* complain_on_overflow */
167 bfd_elf_generic_reloc
, /* special_function */
168 "R_68K_TLS_LDM8", /* name */
169 FALSE
, /* partial_inplace */
171 0x000000ff, /* dst_mask */
172 FALSE
), /* pcrel_offset */
174 HOWTO (R_68K_TLS_LDO32
, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 FALSE
, /* pc_relative */
180 complain_overflow_bitfield
, /* complain_on_overflow */
181 bfd_elf_generic_reloc
, /* special_function */
182 "R_68K_TLS_LDO32", /* name */
183 FALSE
, /* partial_inplace */
185 0xffffffff, /* dst_mask */
186 FALSE
), /* pcrel_offset */
188 HOWTO (R_68K_TLS_LDO16
, /* type */
190 1, /* size (0 = byte, 1 = short, 2 = long) */
192 FALSE
, /* pc_relative */
194 complain_overflow_signed
, /* complain_on_overflow */
195 bfd_elf_generic_reloc
, /* special_function */
196 "R_68K_TLS_LDO16", /* name */
197 FALSE
, /* partial_inplace */
199 0x0000ffff, /* dst_mask */
200 FALSE
), /* pcrel_offset */
202 HOWTO (R_68K_TLS_LDO8
, /* type */
204 0, /* size (0 = byte, 1 = short, 2 = long) */
206 FALSE
, /* pc_relative */
208 complain_overflow_signed
, /* complain_on_overflow */
209 bfd_elf_generic_reloc
, /* special_function */
210 "R_68K_TLS_LDO8", /* name */
211 FALSE
, /* partial_inplace */
213 0x000000ff, /* dst_mask */
214 FALSE
), /* pcrel_offset */
216 /* TLS initial execution variable reference. */
217 HOWTO (R_68K_TLS_IE32
, /* type */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
221 FALSE
, /* pc_relative */
223 complain_overflow_bitfield
, /* complain_on_overflow */
224 bfd_elf_generic_reloc
, /* special_function */
225 "R_68K_TLS_IE32", /* name */
226 FALSE
, /* partial_inplace */
228 0xffffffff, /* dst_mask */
229 FALSE
), /* pcrel_offset */
231 HOWTO (R_68K_TLS_IE16
, /* type */
233 1, /* size (0 = byte, 1 = short, 2 = long) */
235 FALSE
, /* pc_relative */
237 complain_overflow_signed
, /* complain_on_overflow */
238 bfd_elf_generic_reloc
, /* special_function */
239 "R_68K_TLS_IE16", /* name */
240 FALSE
, /* partial_inplace */
242 0x0000ffff, /* dst_mask */
243 FALSE
), /* pcrel_offset */
245 HOWTO (R_68K_TLS_IE8
, /* type */
247 0, /* size (0 = byte, 1 = short, 2 = long) */
249 FALSE
, /* pc_relative */
251 complain_overflow_signed
, /* complain_on_overflow */
252 bfd_elf_generic_reloc
, /* special_function */
253 "R_68K_TLS_IE8", /* name */
254 FALSE
, /* partial_inplace */
256 0x000000ff, /* dst_mask */
257 FALSE
), /* pcrel_offset */
259 /* TLS local execution variable reference. */
260 HOWTO (R_68K_TLS_LE32
, /* type */
262 2, /* size (0 = byte, 1 = short, 2 = long) */
264 FALSE
, /* pc_relative */
266 complain_overflow_bitfield
, /* complain_on_overflow */
267 bfd_elf_generic_reloc
, /* special_function */
268 "R_68K_TLS_LE32", /* name */
269 FALSE
, /* partial_inplace */
271 0xffffffff, /* dst_mask */
272 FALSE
), /* pcrel_offset */
274 HOWTO (R_68K_TLS_LE16
, /* type */
276 1, /* size (0 = byte, 1 = short, 2 = long) */
278 FALSE
, /* pc_relative */
280 complain_overflow_signed
, /* complain_on_overflow */
281 bfd_elf_generic_reloc
, /* special_function */
282 "R_68K_TLS_LE16", /* name */
283 FALSE
, /* partial_inplace */
285 0x0000ffff, /* dst_mask */
286 FALSE
), /* pcrel_offset */
288 HOWTO (R_68K_TLS_LE8
, /* type */
290 0, /* size (0 = byte, 1 = short, 2 = long) */
292 FALSE
, /* pc_relative */
294 complain_overflow_signed
, /* complain_on_overflow */
295 bfd_elf_generic_reloc
, /* special_function */
296 "R_68K_TLS_LE8", /* name */
297 FALSE
, /* partial_inplace */
299 0x000000ff, /* dst_mask */
300 FALSE
), /* pcrel_offset */
302 /* TLS GD/LD dynamic relocations. */
303 HOWTO (R_68K_TLS_DTPMOD32
, /* type */
305 2, /* size (0 = byte, 1 = short, 2 = long) */
307 FALSE
, /* pc_relative */
309 complain_overflow_dont
, /* complain_on_overflow */
310 bfd_elf_generic_reloc
, /* special_function */
311 "R_68K_TLS_DTPMOD32", /* name */
312 FALSE
, /* partial_inplace */
314 0xffffffff, /* dst_mask */
315 FALSE
), /* pcrel_offset */
317 HOWTO (R_68K_TLS_DTPREL32
, /* type */
319 2, /* size (0 = byte, 1 = short, 2 = long) */
321 FALSE
, /* pc_relative */
323 complain_overflow_dont
, /* complain_on_overflow */
324 bfd_elf_generic_reloc
, /* special_function */
325 "R_68K_TLS_DTPREL32", /* name */
326 FALSE
, /* partial_inplace */
328 0xffffffff, /* dst_mask */
329 FALSE
), /* pcrel_offset */
331 HOWTO (R_68K_TLS_TPREL32
, /* type */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
335 FALSE
, /* pc_relative */
337 complain_overflow_dont
, /* complain_on_overflow */
338 bfd_elf_generic_reloc
, /* special_function */
339 "R_68K_TLS_TPREL32", /* name */
340 FALSE
, /* partial_inplace */
342 0xffffffff, /* dst_mask */
343 FALSE
), /* pcrel_offset */
347 rtype_to_howto (bfd
*abfd
, arelent
*cache_ptr
, Elf_Internal_Rela
*dst
)
349 unsigned int indx
= ELF32_R_TYPE (dst
->r_info
);
351 if (indx
>= (unsigned int) R_68K_max
)
353 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
357 cache_ptr
->howto
= &howto_table
[indx
];
360 #define elf_info_to_howto rtype_to_howto
364 bfd_reloc_code_real_type bfd_val
;
369 { BFD_RELOC_NONE
, R_68K_NONE
},
370 { BFD_RELOC_32
, R_68K_32
},
371 { BFD_RELOC_16
, R_68K_16
},
372 { BFD_RELOC_8
, R_68K_8
},
373 { BFD_RELOC_32_PCREL
, R_68K_PC32
},
374 { BFD_RELOC_16_PCREL
, R_68K_PC16
},
375 { BFD_RELOC_8_PCREL
, R_68K_PC8
},
376 { BFD_RELOC_32_GOT_PCREL
, R_68K_GOT32
},
377 { BFD_RELOC_16_GOT_PCREL
, R_68K_GOT16
},
378 { BFD_RELOC_8_GOT_PCREL
, R_68K_GOT8
},
379 { BFD_RELOC_32_GOTOFF
, R_68K_GOT32O
},
380 { BFD_RELOC_16_GOTOFF
, R_68K_GOT16O
},
381 { BFD_RELOC_8_GOTOFF
, R_68K_GOT8O
},
382 { BFD_RELOC_32_PLT_PCREL
, R_68K_PLT32
},
383 { BFD_RELOC_16_PLT_PCREL
, R_68K_PLT16
},
384 { BFD_RELOC_8_PLT_PCREL
, R_68K_PLT8
},
385 { BFD_RELOC_32_PLTOFF
, R_68K_PLT32O
},
386 { BFD_RELOC_16_PLTOFF
, R_68K_PLT16O
},
387 { BFD_RELOC_8_PLTOFF
, R_68K_PLT8O
},
388 { BFD_RELOC_NONE
, R_68K_COPY
},
389 { BFD_RELOC_68K_GLOB_DAT
, R_68K_GLOB_DAT
},
390 { BFD_RELOC_68K_JMP_SLOT
, R_68K_JMP_SLOT
},
391 { BFD_RELOC_68K_RELATIVE
, R_68K_RELATIVE
},
392 { BFD_RELOC_CTOR
, R_68K_32
},
393 { BFD_RELOC_VTABLE_INHERIT
, R_68K_GNU_VTINHERIT
},
394 { BFD_RELOC_VTABLE_ENTRY
, R_68K_GNU_VTENTRY
},
395 { BFD_RELOC_68K_TLS_GD32
, R_68K_TLS_GD32
},
396 { BFD_RELOC_68K_TLS_GD16
, R_68K_TLS_GD16
},
397 { BFD_RELOC_68K_TLS_GD8
, R_68K_TLS_GD8
},
398 { BFD_RELOC_68K_TLS_LDM32
, R_68K_TLS_LDM32
},
399 { BFD_RELOC_68K_TLS_LDM16
, R_68K_TLS_LDM16
},
400 { BFD_RELOC_68K_TLS_LDM8
, R_68K_TLS_LDM8
},
401 { BFD_RELOC_68K_TLS_LDO32
, R_68K_TLS_LDO32
},
402 { BFD_RELOC_68K_TLS_LDO16
, R_68K_TLS_LDO16
},
403 { BFD_RELOC_68K_TLS_LDO8
, R_68K_TLS_LDO8
},
404 { BFD_RELOC_68K_TLS_IE32
, R_68K_TLS_IE32
},
405 { BFD_RELOC_68K_TLS_IE16
, R_68K_TLS_IE16
},
406 { BFD_RELOC_68K_TLS_IE8
, R_68K_TLS_IE8
},
407 { BFD_RELOC_68K_TLS_LE32
, R_68K_TLS_LE32
},
408 { BFD_RELOC_68K_TLS_LE16
, R_68K_TLS_LE16
},
409 { BFD_RELOC_68K_TLS_LE8
, R_68K_TLS_LE8
},
412 static reloc_howto_type
*
413 reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
414 bfd_reloc_code_real_type code
)
417 for (i
= 0; i
< sizeof (reloc_map
) / sizeof (reloc_map
[0]); i
++)
419 if (reloc_map
[i
].bfd_val
== code
)
420 return &howto_table
[reloc_map
[i
].elf_val
];
425 static reloc_howto_type
*
426 reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
, const char *r_name
)
430 for (i
= 0; i
< sizeof (howto_table
) / sizeof (howto_table
[0]); i
++)
431 if (howto_table
[i
].name
!= NULL
432 && strcasecmp (howto_table
[i
].name
, r_name
) == 0)
433 return &howto_table
[i
];
438 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
439 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
440 #define ELF_ARCH bfd_arch_m68k
441 #define ELF_TARGET_ID M68K_ELF_DATA
443 /* Functions for the m68k ELF linker. */
445 /* The name of the dynamic interpreter. This is put in the .interp
448 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
450 /* Describes one of the various PLT styles. */
452 struct elf_m68k_plt_info
454 /* The size of each PLT entry. */
457 /* The template for the first PLT entry. */
458 const bfd_byte
*plt0_entry
;
460 /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations.
461 The comments by each member indicate the value that the relocation
464 unsigned int got4
; /* .got + 4 */
465 unsigned int got8
; /* .got + 8 */
468 /* The template for a symbol's PLT entry. */
469 const bfd_byte
*symbol_entry
;
471 /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations.
472 The comments by each member indicate the value that the relocation
475 unsigned int got
; /* the symbol's .got.plt entry */
476 unsigned int plt
; /* .plt */
479 /* The offset of the resolver stub from the start of SYMBOL_ENTRY.
480 The stub starts with "move.l #relocoffset,%d0". */
481 bfd_vma symbol_resolve_entry
;
484 /* The size in bytes of an entry in the procedure linkage table. */
486 #define PLT_ENTRY_SIZE 20
488 /* The first entry in a procedure linkage table looks like this. See
489 the SVR4 ABI m68k supplement to see how this works. */
491 static const bfd_byte elf_m68k_plt0_entry
[PLT_ENTRY_SIZE
] =
493 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
494 0, 0, 0, 2, /* + (.got + 4) - . */
495 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */
496 0, 0, 0, 2, /* + (.got + 8) - . */
497 0, 0, 0, 0 /* pad out to 20 bytes. */
500 /* Subsequent entries in a procedure linkage table look like this. */
502 static const bfd_byte elf_m68k_plt_entry
[PLT_ENTRY_SIZE
] =
504 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */
505 0, 0, 0, 2, /* + (.got.plt entry) - . */
506 0x2f, 0x3c, /* move.l #offset,-(%sp) */
507 0, 0, 0, 0, /* + reloc index */
508 0x60, 0xff, /* bra.l .plt */
509 0, 0, 0, 0 /* + .plt - . */
512 static const struct elf_m68k_plt_info elf_m68k_plt_info
= {
514 elf_m68k_plt0_entry
, { 4, 12 },
515 elf_m68k_plt_entry
, { 4, 16 }, 8
518 #define ISAB_PLT_ENTRY_SIZE 24
520 static const bfd_byte elf_isab_plt0_entry
[ISAB_PLT_ENTRY_SIZE
] =
522 0x20, 0x3c, /* move.l #offset,%d0 */
523 0, 0, 0, 0, /* + (.got + 4) - . */
524 0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */
525 0x20, 0x3c, /* move.l #offset,%d0 */
526 0, 0, 0, 0, /* + (.got + 8) - . */
527 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
528 0x4e, 0xd0, /* jmp (%a0) */
532 /* Subsequent entries in a procedure linkage table look like this. */
534 static const bfd_byte elf_isab_plt_entry
[ISAB_PLT_ENTRY_SIZE
] =
536 0x20, 0x3c, /* move.l #offset,%d0 */
537 0, 0, 0, 0, /* + (.got.plt entry) - . */
538 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
539 0x4e, 0xd0, /* jmp (%a0) */
540 0x2f, 0x3c, /* move.l #offset,-(%sp) */
541 0, 0, 0, 0, /* + reloc index */
542 0x60, 0xff, /* bra.l .plt */
543 0, 0, 0, 0 /* + .plt - . */
546 static const struct elf_m68k_plt_info elf_isab_plt_info
= {
548 elf_isab_plt0_entry
, { 2, 12 },
549 elf_isab_plt_entry
, { 2, 20 }, 12
552 #define ISAC_PLT_ENTRY_SIZE 24
554 static const bfd_byte elf_isac_plt0_entry
[ISAC_PLT_ENTRY_SIZE
] =
556 0x20, 0x3c, /* move.l #offset,%d0 */
557 0, 0, 0, 0, /* replaced with .got + 4 - . */
558 0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */
559 0x20, 0x3c, /* move.l #offset,%d0 */
560 0, 0, 0, 0, /* replaced with .got + 8 - . */
561 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
562 0x4e, 0xd0, /* jmp (%a0) */
566 /* Subsequent entries in a procedure linkage table look like this. */
568 static const bfd_byte elf_isac_plt_entry
[ISAC_PLT_ENTRY_SIZE
] =
570 0x20, 0x3c, /* move.l #offset,%d0 */
571 0, 0, 0, 0, /* replaced with (.got entry) - . */
572 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
573 0x4e, 0xd0, /* jmp (%a0) */
574 0x2f, 0x3c, /* move.l #offset,-(%sp) */
575 0, 0, 0, 0, /* replaced with offset into relocation table */
576 0x61, 0xff, /* bsr.l .plt */
577 0, 0, 0, 0 /* replaced with .plt - . */
580 static const struct elf_m68k_plt_info elf_isac_plt_info
= {
582 elf_isac_plt0_entry
, { 2, 12},
583 elf_isac_plt_entry
, { 2, 20 }, 12
586 #define CPU32_PLT_ENTRY_SIZE 24
587 /* Procedure linkage table entries for the cpu32 */
588 static const bfd_byte elf_cpu32_plt0_entry
[CPU32_PLT_ENTRY_SIZE
] =
590 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
591 0, 0, 0, 2, /* + (.got + 4) - . */
592 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
593 0, 0, 0, 2, /* + (.got + 8) - . */
594 0x4e, 0xd1, /* jmp %a1@ */
595 0, 0, 0, 0, /* pad out to 24 bytes. */
599 static const bfd_byte elf_cpu32_plt_entry
[CPU32_PLT_ENTRY_SIZE
] =
601 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */
602 0, 0, 0, 2, /* + (.got.plt entry) - . */
603 0x4e, 0xd1, /* jmp %a1@ */
604 0x2f, 0x3c, /* move.l #offset,-(%sp) */
605 0, 0, 0, 0, /* + reloc index */
606 0x60, 0xff, /* bra.l .plt */
607 0, 0, 0, 0, /* + .plt - . */
611 static const struct elf_m68k_plt_info elf_cpu32_plt_info
= {
612 CPU32_PLT_ENTRY_SIZE
,
613 elf_cpu32_plt0_entry
, { 4, 12 },
614 elf_cpu32_plt_entry
, { 4, 18 }, 10
617 /* The m68k linker needs to keep track of the number of relocs that it
618 decides to copy in check_relocs for each symbol. This is so that it
619 can discard PC relative relocs if it doesn't need them when linking
620 with -Bsymbolic. We store the information in a field extending the
621 regular ELF linker hash table. */
623 /* This structure keeps track of the number of PC relative relocs we have
624 copied for a given symbol. */
626 struct elf_m68k_pcrel_relocs_copied
629 struct elf_m68k_pcrel_relocs_copied
*next
;
630 /* A section in dynobj. */
632 /* Number of relocs copied in this section. */
636 /* Forward declaration. */
637 struct elf_m68k_got_entry
;
639 /* m68k ELF linker hash entry. */
641 struct elf_m68k_link_hash_entry
643 struct elf_link_hash_entry root
;
645 /* Number of PC relative relocs copied for this symbol. */
646 struct elf_m68k_pcrel_relocs_copied
*pcrel_relocs_copied
;
648 /* Key to got_entries. */
649 unsigned long got_entry_key
;
651 /* List of GOT entries for this symbol. This list is build during
652 offset finalization and is used within elf_m68k_finish_dynamic_symbol
653 to traverse all GOT entries for a particular symbol.
655 ??? We could've used root.got.glist field instead, but having
656 a separate field is cleaner. */
657 struct elf_m68k_got_entry
*glist
;
660 #define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent))
662 /* Key part of GOT entry in hashtable. */
663 struct elf_m68k_got_entry_key
665 /* BFD in which this symbol was defined. NULL for global symbols. */
668 /* Symbol index. Either local symbol index or h->got_entry_key. */
669 unsigned long symndx
;
671 /* Type is one of R_68K_GOT{8, 16, 32}O, R_68K_TLS_GD{8, 16, 32},
672 R_68K_TLS_LDM{8, 16, 32} or R_68K_TLS_IE{8, 16, 32}.
674 From perspective of hashtable key, only elf_m68k_got_reloc_type (type)
675 matters. That is, we distinguish between, say, R_68K_GOT16O
676 and R_68K_GOT32O when allocating offsets, but they are considered to be
677 the same when searching got->entries. */
678 enum elf_m68k_reloc_type type
;
681 /* Size of the GOT offset suitable for relocation. */
682 enum elf_m68k_got_offset_size
{ R_8
, R_16
, R_32
, R_LAST
};
684 /* Entry of the GOT. */
685 struct elf_m68k_got_entry
687 /* GOT entries are put into a got->entries hashtable. This is the key. */
688 struct elf_m68k_got_entry_key key_
;
690 /* GOT entry data. We need s1 before offset finalization and s2 after. */
695 /* Number of times this entry is referenced. It is used to
696 filter out unnecessary GOT slots in elf_m68k_gc_sweep_hook. */
702 /* Offset from the start of .got section. To calculate offset relative
703 to GOT pointer one should substract got->offset from this value. */
706 /* Pointer to the next GOT entry for this global symbol.
707 Symbols have at most one entry in one GOT, but might
708 have entries in more than one GOT.
709 Root of this list is h->glist.
710 NULL for local symbols. */
711 struct elf_m68k_got_entry
*next
;
716 /* Return representative type for relocation R_TYPE.
717 This is used to avoid enumerating many relocations in comparisons,
720 static enum elf_m68k_reloc_type
721 elf_m68k_reloc_got_type (enum elf_m68k_reloc_type r_type
)
725 /* In most cases R_68K_GOTx relocations require the very same
726 handling as R_68K_GOT32O relocation. In cases when we need
727 to distinguish between the two, we use explicitly compare against
740 return R_68K_TLS_GD32
;
742 case R_68K_TLS_LDM32
:
743 case R_68K_TLS_LDM16
:
745 return R_68K_TLS_LDM32
;
750 return R_68K_TLS_IE32
;
758 /* Return size of the GOT entry offset for relocation R_TYPE. */
760 static enum elf_m68k_got_offset_size
761 elf_m68k_reloc_got_offset_size (enum elf_m68k_reloc_type r_type
)
765 case R_68K_GOT32
: case R_68K_GOT16
: case R_68K_GOT8
:
766 case R_68K_GOT32O
: case R_68K_TLS_GD32
: case R_68K_TLS_LDM32
:
770 case R_68K_GOT16O
: case R_68K_TLS_GD16
: case R_68K_TLS_LDM16
:
774 case R_68K_GOT8O
: case R_68K_TLS_GD8
: case R_68K_TLS_LDM8
:
784 /* Return number of GOT entries we need to allocate in GOT for
785 relocation R_TYPE. */
788 elf_m68k_reloc_got_n_slots (enum elf_m68k_reloc_type r_type
)
790 switch (elf_m68k_reloc_got_type (r_type
))
797 case R_68K_TLS_LDM32
:
806 /* Return TRUE if relocation R_TYPE is a TLS one. */
809 elf_m68k_reloc_tls_p (enum elf_m68k_reloc_type r_type
)
813 case R_68K_TLS_GD32
: case R_68K_TLS_GD16
: case R_68K_TLS_GD8
:
814 case R_68K_TLS_LDM32
: case R_68K_TLS_LDM16
: case R_68K_TLS_LDM8
:
815 case R_68K_TLS_LDO32
: case R_68K_TLS_LDO16
: case R_68K_TLS_LDO8
:
816 case R_68K_TLS_IE32
: case R_68K_TLS_IE16
: case R_68K_TLS_IE8
:
817 case R_68K_TLS_LE32
: case R_68K_TLS_LE16
: case R_68K_TLS_LE8
:
818 case R_68K_TLS_DTPMOD32
: case R_68K_TLS_DTPREL32
: case R_68K_TLS_TPREL32
:
826 /* Data structure representing a single GOT. */
829 /* Hashtable of 'struct elf_m68k_got_entry's.
830 Starting size of this table is the maximum number of
831 R_68K_GOT8O entries. */
834 /* Number of R_x slots in this GOT. Some (e.g., TLS) entries require
837 n_slots[R_8] is the count of R_8 slots in this GOT.
838 n_slots[R_16] is the cumulative count of R_8 and R_16 slots
840 n_slots[R_32] is the cumulative count of R_8, R_16 and R_32 slots
841 in this GOT. This is the total number of slots. */
842 bfd_vma n_slots
[R_LAST
];
844 /* Number of local (entry->key_.h == NULL) slots in this GOT.
845 This is only used to properly calculate size of .rela.got section;
846 see elf_m68k_partition_multi_got. */
847 bfd_vma local_n_slots
;
849 /* Offset of this GOT relative to beginning of .got section. */
853 /* BFD and its GOT. This is an entry in multi_got->bfd2got hashtable. */
854 struct elf_m68k_bfd2got_entry
859 /* Assigned GOT. Before partitioning multi-GOT each BFD has its own
860 GOT structure. After partitioning several BFD's might [and often do]
861 share a single GOT. */
862 struct elf_m68k_got
*got
;
865 /* The main data structure holding all the pieces. */
866 struct elf_m68k_multi_got
868 /* Hashtable mapping each BFD to its GOT. If a BFD doesn't have an entry
869 here, then it doesn't need a GOT (this includes the case of a BFD
870 having an empty GOT).
872 ??? This hashtable can be replaced by an array indexed by bfd->id. */
875 /* Next symndx to assign a global symbol.
876 h->got_entry_key is initialized from this counter. */
877 unsigned long global_symndx
;
880 /* m68k ELF linker hash table. */
882 struct elf_m68k_link_hash_table
884 struct elf_link_hash_table root
;
886 /* Small local sym cache. */
887 struct sym_cache sym_cache
;
889 /* The PLT format used by this link, or NULL if the format has not
891 const struct elf_m68k_plt_info
*plt_info
;
893 /* True, if GP is loaded within each function which uses it.
894 Set to TRUE when GOT negative offsets or multi-GOT is enabled. */
895 bfd_boolean local_gp_p
;
897 /* Switch controlling use of negative offsets to double the size of GOTs. */
898 bfd_boolean use_neg_got_offsets_p
;
900 /* Switch controlling generation of multiple GOTs. */
901 bfd_boolean allow_multigot_p
;
903 /* Multi-GOT data structure. */
904 struct elf_m68k_multi_got multi_got_
;
907 /* Get the m68k ELF linker hash table from a link_info structure. */
909 #define elf_m68k_hash_table(p) \
910 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
911 == M68K_ELF_DATA ? ((struct elf_m68k_link_hash_table *) ((p)->hash)) : NULL)
913 /* Shortcut to multi-GOT data. */
914 #define elf_m68k_multi_got(INFO) (&elf_m68k_hash_table (INFO)->multi_got_)
916 /* Create an entry in an m68k ELF linker hash table. */
918 static struct bfd_hash_entry
*
919 elf_m68k_link_hash_newfunc (struct bfd_hash_entry
*entry
,
920 struct bfd_hash_table
*table
,
923 struct bfd_hash_entry
*ret
= entry
;
925 /* Allocate the structure if it has not already been allocated by a
928 ret
= bfd_hash_allocate (table
,
929 sizeof (struct elf_m68k_link_hash_entry
));
933 /* Call the allocation method of the superclass. */
934 ret
= _bfd_elf_link_hash_newfunc (ret
, table
, string
);
937 elf_m68k_hash_entry (ret
)->pcrel_relocs_copied
= NULL
;
938 elf_m68k_hash_entry (ret
)->got_entry_key
= 0;
939 elf_m68k_hash_entry (ret
)->glist
= NULL
;
945 /* Create an m68k ELF linker hash table. */
947 static struct bfd_link_hash_table
*
948 elf_m68k_link_hash_table_create (bfd
*abfd
)
950 struct elf_m68k_link_hash_table
*ret
;
951 bfd_size_type amt
= sizeof (struct elf_m68k_link_hash_table
);
953 ret
= (struct elf_m68k_link_hash_table
*) bfd_malloc (amt
);
954 if (ret
== (struct elf_m68k_link_hash_table
*) NULL
)
957 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
958 elf_m68k_link_hash_newfunc
,
959 sizeof (struct elf_m68k_link_hash_entry
),
966 ret
->sym_cache
.abfd
= NULL
;
967 ret
->plt_info
= NULL
;
968 ret
->local_gp_p
= FALSE
;
969 ret
->use_neg_got_offsets_p
= FALSE
;
970 ret
->allow_multigot_p
= FALSE
;
971 ret
->multi_got_
.bfd2got
= NULL
;
972 ret
->multi_got_
.global_symndx
= 1;
974 return &ret
->root
.root
;
977 /* Destruct local data. */
980 elf_m68k_link_hash_table_free (struct bfd_link_hash_table
*_htab
)
982 struct elf_m68k_link_hash_table
*htab
;
984 htab
= (struct elf_m68k_link_hash_table
*) _htab
;
986 if (htab
->multi_got_
.bfd2got
!= NULL
)
988 htab_delete (htab
->multi_got_
.bfd2got
);
989 htab
->multi_got_
.bfd2got
= NULL
;
993 /* Set the right machine number. */
996 elf32_m68k_object_p (bfd
*abfd
)
998 unsigned int mach
= 0;
999 unsigned features
= 0;
1000 flagword eflags
= elf_elfheader (abfd
)->e_flags
;
1002 if ((eflags
& EF_M68K_ARCH_MASK
) == EF_M68K_M68000
)
1004 else if ((eflags
& EF_M68K_ARCH_MASK
) == EF_M68K_CPU32
)
1006 else if ((eflags
& EF_M68K_ARCH_MASK
) == EF_M68K_FIDO
)
1010 switch (eflags
& EF_M68K_CF_ISA_MASK
)
1012 case EF_M68K_CF_ISA_A_NODIV
:
1013 features
|= mcfisa_a
;
1015 case EF_M68K_CF_ISA_A
:
1016 features
|= mcfisa_a
|mcfhwdiv
;
1018 case EF_M68K_CF_ISA_A_PLUS
:
1019 features
|= mcfisa_a
|mcfisa_aa
|mcfhwdiv
|mcfusp
;
1021 case EF_M68K_CF_ISA_B_NOUSP
:
1022 features
|= mcfisa_a
|mcfisa_b
|mcfhwdiv
;
1024 case EF_M68K_CF_ISA_B
:
1025 features
|= mcfisa_a
|mcfisa_b
|mcfhwdiv
|mcfusp
;
1027 case EF_M68K_CF_ISA_C
:
1028 features
|= mcfisa_a
|mcfisa_c
|mcfhwdiv
|mcfusp
;
1030 case EF_M68K_CF_ISA_C_NODIV
:
1031 features
|= mcfisa_a
|mcfisa_c
|mcfusp
;
1034 switch (eflags
& EF_M68K_CF_MAC_MASK
)
1036 case EF_M68K_CF_MAC
:
1039 case EF_M68K_CF_EMAC
:
1040 features
|= mcfemac
;
1043 if (eflags
& EF_M68K_CF_FLOAT
)
1047 mach
= bfd_m68k_features_to_mach (features
);
1048 bfd_default_set_arch_mach (abfd
, bfd_arch_m68k
, mach
);
1053 /* Somewhat reverse of elf32_m68k_object_p, this sets the e_flag
1054 field based on the machine number. */
1057 elf_m68k_final_write_processing (bfd
*abfd
,
1058 bfd_boolean linker ATTRIBUTE_UNUSED
)
1060 int mach
= bfd_get_mach (abfd
);
1061 unsigned long e_flags
= elf_elfheader (abfd
)->e_flags
;
1065 unsigned int arch_mask
;
1067 arch_mask
= bfd_m68k_mach_to_features (mach
);
1069 if (arch_mask
& m68000
)
1070 e_flags
= EF_M68K_M68000
;
1071 else if (arch_mask
& cpu32
)
1072 e_flags
= EF_M68K_CPU32
;
1073 else if (arch_mask
& fido_a
)
1074 e_flags
= EF_M68K_FIDO
;
1078 & (mcfisa_a
| mcfisa_aa
| mcfisa_b
| mcfisa_c
| mcfhwdiv
| mcfusp
))
1081 e_flags
|= EF_M68K_CF_ISA_A_NODIV
;
1083 case mcfisa_a
| mcfhwdiv
:
1084 e_flags
|= EF_M68K_CF_ISA_A
;
1086 case mcfisa_a
| mcfisa_aa
| mcfhwdiv
| mcfusp
:
1087 e_flags
|= EF_M68K_CF_ISA_A_PLUS
;
1089 case mcfisa_a
| mcfisa_b
| mcfhwdiv
:
1090 e_flags
|= EF_M68K_CF_ISA_B_NOUSP
;
1092 case mcfisa_a
| mcfisa_b
| mcfhwdiv
| mcfusp
:
1093 e_flags
|= EF_M68K_CF_ISA_B
;
1095 case mcfisa_a
| mcfisa_c
| mcfhwdiv
| mcfusp
:
1096 e_flags
|= EF_M68K_CF_ISA_C
;
1098 case mcfisa_a
| mcfisa_c
| mcfusp
:
1099 e_flags
|= EF_M68K_CF_ISA_C_NODIV
;
1102 if (arch_mask
& mcfmac
)
1103 e_flags
|= EF_M68K_CF_MAC
;
1104 else if (arch_mask
& mcfemac
)
1105 e_flags
|= EF_M68K_CF_EMAC
;
1106 if (arch_mask
& cfloat
)
1107 e_flags
|= EF_M68K_CF_FLOAT
| EF_M68K_CFV4E
;
1109 elf_elfheader (abfd
)->e_flags
= e_flags
;
1113 /* Keep m68k-specific flags in the ELF header. */
1116 elf32_m68k_set_private_flags (bfd
*abfd
, flagword flags
)
1118 elf_elfheader (abfd
)->e_flags
= flags
;
1119 elf_flags_init (abfd
) = TRUE
;
1123 /* Merge backend specific data from an object file to the output
1124 object file when linking. */
1126 elf32_m68k_merge_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
1132 const bfd_arch_info_type
*arch_info
;
1134 if ( bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1135 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1138 /* Get the merged machine. This checks for incompatibility between
1139 Coldfire & non-Coldfire flags, incompability between different
1140 Coldfire ISAs, and incompability between different MAC types. */
1141 arch_info
= bfd_arch_get_compatible (ibfd
, obfd
, FALSE
);
1145 bfd_set_arch_mach (obfd
, bfd_arch_m68k
, arch_info
->mach
);
1147 in_flags
= elf_elfheader (ibfd
)->e_flags
;
1148 if (!elf_flags_init (obfd
))
1150 elf_flags_init (obfd
) = TRUE
;
1151 out_flags
= in_flags
;
1155 out_flags
= elf_elfheader (obfd
)->e_flags
;
1156 unsigned int variant_mask
;
1158 if ((in_flags
& EF_M68K_ARCH_MASK
) == EF_M68K_M68000
)
1160 else if ((in_flags
& EF_M68K_ARCH_MASK
) == EF_M68K_CPU32
)
1162 else if ((in_flags
& EF_M68K_ARCH_MASK
) == EF_M68K_FIDO
)
1165 variant_mask
= EF_M68K_CF_ISA_MASK
;
1167 in_isa
= (in_flags
& variant_mask
);
1168 out_isa
= (out_flags
& variant_mask
);
1169 if (in_isa
> out_isa
)
1170 out_flags
^= in_isa
^ out_isa
;
1171 if (((in_flags
& EF_M68K_ARCH_MASK
) == EF_M68K_CPU32
1172 && (out_flags
& EF_M68K_ARCH_MASK
) == EF_M68K_FIDO
)
1173 || ((in_flags
& EF_M68K_ARCH_MASK
) == EF_M68K_FIDO
1174 && (out_flags
& EF_M68K_ARCH_MASK
) == EF_M68K_CPU32
))
1175 out_flags
= EF_M68K_FIDO
;
1177 out_flags
|= in_flags
^ in_isa
;
1179 elf_elfheader (obfd
)->e_flags
= out_flags
;
1184 /* Display the flags field. */
1187 elf32_m68k_print_private_bfd_data (bfd
*abfd
, void * ptr
)
1189 FILE *file
= (FILE *) ptr
;
1190 flagword eflags
= elf_elfheader (abfd
)->e_flags
;
1192 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
1194 /* Print normal ELF private data. */
1195 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
1197 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
1199 /* xgettext:c-format */
1200 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
1202 if ((eflags
& EF_M68K_ARCH_MASK
) == EF_M68K_M68000
)
1203 fprintf (file
, " [m68000]");
1204 else if ((eflags
& EF_M68K_ARCH_MASK
) == EF_M68K_CPU32
)
1205 fprintf (file
, " [cpu32]");
1206 else if ((eflags
& EF_M68K_ARCH_MASK
) == EF_M68K_FIDO
)
1207 fprintf (file
, " [fido]");
1210 if ((eflags
& EF_M68K_ARCH_MASK
) == EF_M68K_CFV4E
)
1211 fprintf (file
, " [cfv4e]");
1213 if (eflags
& EF_M68K_CF_ISA_MASK
)
1215 char const *isa
= _("unknown");
1216 char const *mac
= _("unknown");
1217 char const *additional
= "";
1219 switch (eflags
& EF_M68K_CF_ISA_MASK
)
1221 case EF_M68K_CF_ISA_A_NODIV
:
1223 additional
= " [nodiv]";
1225 case EF_M68K_CF_ISA_A
:
1228 case EF_M68K_CF_ISA_A_PLUS
:
1231 case EF_M68K_CF_ISA_B_NOUSP
:
1233 additional
= " [nousp]";
1235 case EF_M68K_CF_ISA_B
:
1238 case EF_M68K_CF_ISA_C
:
1241 case EF_M68K_CF_ISA_C_NODIV
:
1243 additional
= " [nodiv]";
1246 fprintf (file
, " [isa %s]%s", isa
, additional
);
1248 if (eflags
& EF_M68K_CF_FLOAT
)
1249 fprintf (file
, " [float]");
1251 switch (eflags
& EF_M68K_CF_MAC_MASK
)
1256 case EF_M68K_CF_MAC
:
1259 case EF_M68K_CF_EMAC
:
1262 case EF_M68K_CF_EMAC_B
:
1267 fprintf (file
, " [%s]", mac
);
1276 /* Multi-GOT support implementation design:
1278 Multi-GOT starts in check_relocs hook. There we scan all
1279 relocations of a BFD and build a local GOT (struct elf_m68k_got)
1280 for it. If a single BFD appears to require too many GOT slots with
1281 R_68K_GOT8O or R_68K_GOT16O relocations, we fail with notification
1283 After check_relocs has been invoked for each input BFD, we have
1284 constructed a GOT for each input BFD.
1286 To minimize total number of GOTs required for a particular output BFD
1287 (as some environments support only 1 GOT per output object) we try
1288 to merge some of the GOTs to share an offset space. Ideally [and in most
1289 cases] we end up with a single GOT. In cases when there are too many
1290 restricted relocations (e.g., R_68K_GOT16O relocations) we end up with
1291 several GOTs, assuming the environment can handle them.
1293 Partitioning is done in elf_m68k_partition_multi_got. We start with
1294 an empty GOT and traverse bfd2got hashtable putting got_entries from
1295 local GOTs to the new 'big' one. We do that by constructing an
1296 intermediate GOT holding all the entries the local GOT has and the big
1297 GOT lacks. Then we check if there is room in the big GOT to accomodate
1298 all the entries from diff. On success we add those entries to the big
1299 GOT; on failure we start the new 'big' GOT and retry the adding of
1300 entries from the local GOT. Note that this retry will always succeed as
1301 each local GOT doesn't overflow the limits. After partitioning we
1302 end up with each bfd assigned one of the big GOTs. GOT entries in the
1303 big GOTs are initialized with GOT offsets. Note that big GOTs are
1304 positioned consequently in program space and represent a single huge GOT
1305 to the outside world.
1307 After that we get to elf_m68k_relocate_section. There we
1308 adjust relocations of GOT pointer (_GLOBAL_OFFSET_TABLE_) and symbol
1309 relocations to refer to appropriate [assigned to current input_bfd]
1314 GOT entry type: We have several types of GOT entries.
1315 * R_8 type is used in entries for symbols that have at least one
1316 R_68K_GOT8O or R_68K_TLS_*8 relocation. We can have at most 0x40
1317 such entries in one GOT.
1318 * R_16 type is used in entries for symbols that have at least one
1319 R_68K_GOT16O or R_68K_TLS_*16 relocation and no R_8 relocations.
1320 We can have at most 0x4000 such entries in one GOT.
1321 * R_32 type is used in all other cases. We can have as many
1322 such entries in one GOT as we'd like.
1323 When counting relocations we have to include the count of the smaller
1324 ranged relocations in the counts of the larger ranged ones in order
1325 to correctly detect overflow.
1327 Sorting the GOT: In each GOT starting offsets are assigned to
1328 R_8 entries, which are followed by R_16 entries, and
1329 R_32 entries go at the end. See finalize_got_offsets for details.
1331 Negative GOT offsets: To double usable offset range of GOTs we use
1332 negative offsets. As we assign entries with GOT offsets relative to
1333 start of .got section, the offset values are positive. They become
1334 negative only in relocate_section where got->offset value is
1335 subtracted from them.
1337 3 special GOT entries: There are 3 special GOT entries used internally
1338 by loader. These entries happen to be placed to .got.plt section,
1339 so we don't do anything about them in multi-GOT support.
1341 Memory management: All data except for hashtables
1342 multi_got->bfd2got and got->entries are allocated on
1343 elf_hash_table (info)->dynobj bfd (for this reason we pass 'info'
1344 to most functions), so we don't need to care to free them. At the
1345 moment of allocation hashtables are being linked into main data
1346 structure (multi_got), all pieces of which are reachable from
1347 elf_m68k_multi_got (info). We deallocate them in
1348 elf_m68k_link_hash_table_free. */
1350 /* Initialize GOT. */
1353 elf_m68k_init_got (struct elf_m68k_got
*got
)
1355 got
->entries
= NULL
;
1356 got
->n_slots
[R_8
] = 0;
1357 got
->n_slots
[R_16
] = 0;
1358 got
->n_slots
[R_32
] = 0;
1359 got
->local_n_slots
= 0;
1360 got
->offset
= (bfd_vma
) -1;
1366 elf_m68k_clear_got (struct elf_m68k_got
*got
)
1368 if (got
->entries
!= NULL
)
1370 htab_delete (got
->entries
);
1371 got
->entries
= NULL
;
1375 /* Create and empty GOT structure. INFO is the context where memory
1376 should be allocated. */
1378 static struct elf_m68k_got
*
1379 elf_m68k_create_empty_got (struct bfd_link_info
*info
)
1381 struct elf_m68k_got
*got
;
1383 got
= bfd_alloc (elf_hash_table (info
)->dynobj
, sizeof (*got
));
1387 elf_m68k_init_got (got
);
1392 /* Initialize KEY. */
1395 elf_m68k_init_got_entry_key (struct elf_m68k_got_entry_key
*key
,
1396 struct elf_link_hash_entry
*h
,
1397 const bfd
*abfd
, unsigned long symndx
,
1398 enum elf_m68k_reloc_type reloc_type
)
1400 if (elf_m68k_reloc_got_type (reloc_type
) == R_68K_TLS_LDM32
)
1401 /* All TLS_LDM relocations share a single GOT entry. */
1407 /* Global symbols are identified with their got_entry_key. */
1410 key
->symndx
= elf_m68k_hash_entry (h
)->got_entry_key
;
1411 BFD_ASSERT (key
->symndx
!= 0);
1414 /* Local symbols are identified by BFD they appear in and symndx. */
1417 key
->symndx
= symndx
;
1420 key
->type
= reloc_type
;
1423 /* Calculate hash of got_entry.
1427 elf_m68k_got_entry_hash (const void *_entry
)
1429 const struct elf_m68k_got_entry_key
*key
;
1431 key
= &((const struct elf_m68k_got_entry
*) _entry
)->key_
;
1434 + (key
->bfd
!= NULL
? (int) key
->bfd
->id
: -1)
1435 + elf_m68k_reloc_got_type (key
->type
));
1438 /* Check if two got entries are equal. */
1441 elf_m68k_got_entry_eq (const void *_entry1
, const void *_entry2
)
1443 const struct elf_m68k_got_entry_key
*key1
;
1444 const struct elf_m68k_got_entry_key
*key2
;
1446 key1
= &((const struct elf_m68k_got_entry
*) _entry1
)->key_
;
1447 key2
= &((const struct elf_m68k_got_entry
*) _entry2
)->key_
;
1449 return (key1
->bfd
== key2
->bfd
1450 && key1
->symndx
== key2
->symndx
1451 && (elf_m68k_reloc_got_type (key1
->type
)
1452 == elf_m68k_reloc_got_type (key2
->type
)));
1455 /* When using negative offsets, we allocate one extra R_8, one extra R_16
1456 and one extra R_32 slots to simplify handling of 2-slot entries during
1457 offset allocation -- hence -1 for R_8 slots and -2 for R_16 slots. */
1459 /* Maximal number of R_8 slots in a single GOT. */
1460 #define ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT(INFO) \
1461 (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
1465 /* Maximal number of R_8 and R_16 slots in a single GOT. */
1466 #define ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT(INFO) \
1467 (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \
1471 /* SEARCH - simply search the hashtable, don't insert new entries or fail when
1472 the entry cannot be found.
1473 FIND_OR_CREATE - search for an existing entry, but create new if there's
1475 MUST_FIND - search for an existing entry and assert that it exist.
1476 MUST_CREATE - assert that there's no such entry and create new one. */
1477 enum elf_m68k_get_entry_howto
1485 /* Get or create (depending on HOWTO) entry with KEY in GOT.
1486 INFO is context in which memory should be allocated (can be NULL if
1487 HOWTO is SEARCH or MUST_FIND). */
1489 static struct elf_m68k_got_entry
*
1490 elf_m68k_get_got_entry (struct elf_m68k_got
*got
,
1491 const struct elf_m68k_got_entry_key
*key
,
1492 enum elf_m68k_get_entry_howto howto
,
1493 struct bfd_link_info
*info
)
1495 struct elf_m68k_got_entry entry_
;
1496 struct elf_m68k_got_entry
*entry
;
1499 BFD_ASSERT ((info
== NULL
) == (howto
== SEARCH
|| howto
== MUST_FIND
));
1501 if (got
->entries
== NULL
)
1502 /* This is the first entry in ABFD. Initialize hashtable. */
1504 if (howto
== SEARCH
)
1507 got
->entries
= htab_try_create (ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT
1509 elf_m68k_got_entry_hash
,
1510 elf_m68k_got_entry_eq
, NULL
);
1511 if (got
->entries
== NULL
)
1513 bfd_set_error (bfd_error_no_memory
);
1519 ptr
= htab_find_slot (got
->entries
, &entry_
, (howto
!= SEARCH
1520 ? INSERT
: NO_INSERT
));
1523 if (howto
== SEARCH
)
1524 /* Entry not found. */
1527 /* We're out of memory. */
1528 bfd_set_error (bfd_error_no_memory
);
1533 /* We didn't find the entry and we're asked to create a new one. */
1535 BFD_ASSERT (howto
!= MUST_FIND
&& howto
!= SEARCH
);
1537 entry
= bfd_alloc (elf_hash_table (info
)->dynobj
, sizeof (*entry
));
1541 /* Initialize new entry. */
1544 entry
->u
.s1
.refcount
= 0;
1546 /* Mark the entry as not initialized. */
1547 entry
->key_
.type
= R_68K_max
;
1552 /* We found the entry. */
1554 BFD_ASSERT (howto
!= MUST_CREATE
);
1562 /* Update GOT counters when merging entry of WAS type with entry of NEW type.
1563 Return the value to which ENTRY's type should be set. */
1565 static enum elf_m68k_reloc_type
1566 elf_m68k_update_got_entry_type (struct elf_m68k_got
*got
,
1567 enum elf_m68k_reloc_type was
,
1568 enum elf_m68k_reloc_type new_reloc
)
1570 enum elf_m68k_got_offset_size was_size
;
1571 enum elf_m68k_got_offset_size new_size
;
1574 if (was
== R_68K_max
)
1575 /* The type of the entry is not initialized yet. */
1577 /* Update all got->n_slots counters, including n_slots[R_32]. */
1584 /* !!! We, probably, should emit an error rather then fail on assert
1586 BFD_ASSERT (elf_m68k_reloc_got_type (was
)
1587 == elf_m68k_reloc_got_type (new_reloc
));
1589 was_size
= elf_m68k_reloc_got_offset_size (was
);
1592 new_size
= elf_m68k_reloc_got_offset_size (new_reloc
);
1593 n_slots
= elf_m68k_reloc_got_n_slots (new_reloc
);
1595 while (was_size
> new_size
)
1598 got
->n_slots
[was_size
] += n_slots
;
1601 if (new_reloc
> was
)
1602 /* Relocations are ordered from bigger got offset size to lesser,
1603 so choose the relocation type with lesser offset size. */
1609 /* Update GOT counters when removing an entry of type TYPE. */
1612 elf_m68k_remove_got_entry_type (struct elf_m68k_got
*got
,
1613 enum elf_m68k_reloc_type type
)
1615 enum elf_m68k_got_offset_size os
;
1618 n_slots
= elf_m68k_reloc_got_n_slots (type
);
1620 /* Decrese counter of slots with offset size corresponding to TYPE
1621 and all greater offset sizes. */
1622 for (os
= elf_m68k_reloc_got_offset_size (type
); os
<= R_32
; ++os
)
1624 BFD_ASSERT (got
->n_slots
[os
] >= n_slots
);
1626 got
->n_slots
[os
] -= n_slots
;
1630 /* Add new or update existing entry to GOT.
1631 H, ABFD, TYPE and SYMNDX is data for the entry.
1632 INFO is a context where memory should be allocated. */
1634 static struct elf_m68k_got_entry
*
1635 elf_m68k_add_entry_to_got (struct elf_m68k_got
*got
,
1636 struct elf_link_hash_entry
*h
,
1638 enum elf_m68k_reloc_type reloc_type
,
1639 unsigned long symndx
,
1640 struct bfd_link_info
*info
)
1642 struct elf_m68k_got_entry_key key_
;
1643 struct elf_m68k_got_entry
*entry
;
1645 if (h
!= NULL
&& elf_m68k_hash_entry (h
)->got_entry_key
== 0)
1646 elf_m68k_hash_entry (h
)->got_entry_key
1647 = elf_m68k_multi_got (info
)->global_symndx
++;
1649 elf_m68k_init_got_entry_key (&key_
, h
, abfd
, symndx
, reloc_type
);
1651 entry
= elf_m68k_get_got_entry (got
, &key_
, FIND_OR_CREATE
, info
);
1655 /* Determine entry's type and update got->n_slots counters. */
1656 entry
->key_
.type
= elf_m68k_update_got_entry_type (got
,
1660 /* Update refcount. */
1661 ++entry
->u
.s1
.refcount
;
1663 if (entry
->u
.s1
.refcount
== 1)
1664 /* We see this entry for the first time. */
1666 if (entry
->key_
.bfd
!= NULL
)
1667 got
->local_n_slots
+= elf_m68k_reloc_got_n_slots (entry
->key_
.type
);
1670 BFD_ASSERT (got
->n_slots
[R_32
] >= got
->local_n_slots
);
1672 if ((got
->n_slots
[R_8
]
1673 > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info
))
1674 || (got
->n_slots
[R_16
]
1675 > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info
)))
1676 /* This BFD has too many relocation. */
1678 if (got
->n_slots
[R_8
] > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info
))
1679 (*_bfd_error_handler
) (_("%B: GOT overflow: "
1680 "Number of relocations with 8-bit "
1683 ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info
));
1685 (*_bfd_error_handler
) (_("%B: GOT overflow: "
1686 "Number of relocations with 8- or 16-bit "
1689 ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info
));
1697 /* Compute the hash value of the bfd in a bfd2got hash entry. */
1700 elf_m68k_bfd2got_entry_hash (const void *entry
)
1702 const struct elf_m68k_bfd2got_entry
*e
;
1704 e
= (const struct elf_m68k_bfd2got_entry
*) entry
;
1709 /* Check whether two hash entries have the same bfd. */
1712 elf_m68k_bfd2got_entry_eq (const void *entry1
, const void *entry2
)
1714 const struct elf_m68k_bfd2got_entry
*e1
;
1715 const struct elf_m68k_bfd2got_entry
*e2
;
1717 e1
= (const struct elf_m68k_bfd2got_entry
*) entry1
;
1718 e2
= (const struct elf_m68k_bfd2got_entry
*) entry2
;
1720 return e1
->bfd
== e2
->bfd
;
1723 /* Destruct a bfd2got entry. */
1726 elf_m68k_bfd2got_entry_del (void *_entry
)
1728 struct elf_m68k_bfd2got_entry
*entry
;
1730 entry
= (struct elf_m68k_bfd2got_entry
*) _entry
;
1732 BFD_ASSERT (entry
->got
!= NULL
);
1733 elf_m68k_clear_got (entry
->got
);
1736 /* Find existing or create new (depending on HOWTO) bfd2got entry in
1737 MULTI_GOT. ABFD is the bfd we need a GOT for. INFO is a context where
1738 memory should be allocated. */
1740 static struct elf_m68k_bfd2got_entry
*
1741 elf_m68k_get_bfd2got_entry (struct elf_m68k_multi_got
*multi_got
,
1743 enum elf_m68k_get_entry_howto howto
,
1744 struct bfd_link_info
*info
)
1746 struct elf_m68k_bfd2got_entry entry_
;
1748 struct elf_m68k_bfd2got_entry
*entry
;
1750 BFD_ASSERT ((info
== NULL
) == (howto
== SEARCH
|| howto
== MUST_FIND
));
1752 if (multi_got
->bfd2got
== NULL
)
1753 /* This is the first GOT. Initialize bfd2got. */
1755 if (howto
== SEARCH
)
1758 multi_got
->bfd2got
= htab_try_create (1, elf_m68k_bfd2got_entry_hash
,
1759 elf_m68k_bfd2got_entry_eq
,
1760 elf_m68k_bfd2got_entry_del
);
1761 if (multi_got
->bfd2got
== NULL
)
1763 bfd_set_error (bfd_error_no_memory
);
1769 ptr
= htab_find_slot (multi_got
->bfd2got
, &entry_
, (howto
!= SEARCH
1770 ? INSERT
: NO_INSERT
));
1773 if (howto
== SEARCH
)
1774 /* Entry not found. */
1777 /* We're out of memory. */
1778 bfd_set_error (bfd_error_no_memory
);
1783 /* Entry was not found. Create new one. */
1785 BFD_ASSERT (howto
!= MUST_FIND
&& howto
!= SEARCH
);
1787 entry
= ((struct elf_m68k_bfd2got_entry
*)
1788 bfd_alloc (elf_hash_table (info
)->dynobj
, sizeof (*entry
)));
1794 entry
->got
= elf_m68k_create_empty_got (info
);
1795 if (entry
->got
== NULL
)
1802 BFD_ASSERT (howto
!= MUST_CREATE
);
1804 /* Return existing entry. */
1811 struct elf_m68k_can_merge_gots_arg
1813 /* A current_got that we constructing a DIFF against. */
1814 struct elf_m68k_got
*big
;
1816 /* GOT holding entries not present or that should be changed in
1818 struct elf_m68k_got
*diff
;
1820 /* Context where to allocate memory. */
1821 struct bfd_link_info
*info
;
1824 bfd_boolean error_p
;
1827 /* Process a single entry from the small GOT to see if it should be added
1828 or updated in the big GOT. */
1831 elf_m68k_can_merge_gots_1 (void **_entry_ptr
, void *_arg
)
1833 const struct elf_m68k_got_entry
*entry1
;
1834 struct elf_m68k_can_merge_gots_arg
*arg
;
1835 const struct elf_m68k_got_entry
*entry2
;
1836 enum elf_m68k_reloc_type type
;
1838 entry1
= (const struct elf_m68k_got_entry
*) *_entry_ptr
;
1839 arg
= (struct elf_m68k_can_merge_gots_arg
*) _arg
;
1841 entry2
= elf_m68k_get_got_entry (arg
->big
, &entry1
->key_
, SEARCH
, NULL
);
1844 /* We found an existing entry. Check if we should update it. */
1846 type
= elf_m68k_update_got_entry_type (arg
->diff
,
1850 if (type
== entry2
->key_
.type
)
1851 /* ENTRY1 doesn't update data in ENTRY2. Skip it.
1852 To skip creation of difference entry we use the type,
1853 which we won't see in GOT entries for sure. */
1857 /* We didn't find the entry. Add entry1 to DIFF. */
1859 BFD_ASSERT (entry1
->key_
.type
!= R_68K_max
);
1861 type
= elf_m68k_update_got_entry_type (arg
->diff
,
1862 R_68K_max
, entry1
->key_
.type
);
1864 if (entry1
->key_
.bfd
!= NULL
)
1865 arg
->diff
->local_n_slots
+= elf_m68k_reloc_got_n_slots (type
);
1868 if (type
!= R_68K_max
)
1869 /* Create an entry in DIFF. */
1871 struct elf_m68k_got_entry
*entry
;
1873 entry
= elf_m68k_get_got_entry (arg
->diff
, &entry1
->key_
, MUST_CREATE
,
1877 arg
->error_p
= TRUE
;
1881 entry
->key_
.type
= type
;
1887 /* Return TRUE if SMALL GOT can be added to BIG GOT without overflowing it.
1888 Construct DIFF GOT holding the entries which should be added or updated
1889 in BIG GOT to accumulate information from SMALL.
1890 INFO is the context where memory should be allocated. */
1893 elf_m68k_can_merge_gots (struct elf_m68k_got
*big
,
1894 const struct elf_m68k_got
*small
,
1895 struct bfd_link_info
*info
,
1896 struct elf_m68k_got
*diff
)
1898 struct elf_m68k_can_merge_gots_arg arg_
;
1900 BFD_ASSERT (small
->offset
== (bfd_vma
) -1);
1905 arg_
.error_p
= FALSE
;
1906 htab_traverse_noresize (small
->entries
, elf_m68k_can_merge_gots_1
, &arg_
);
1913 /* Check for overflow. */
1914 if ((big
->n_slots
[R_8
] + arg_
.diff
->n_slots
[R_8
]
1915 > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info
))
1916 || (big
->n_slots
[R_16
] + arg_
.diff
->n_slots
[R_16
]
1917 > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info
)))
1923 struct elf_m68k_merge_gots_arg
1926 struct elf_m68k_got
*big
;
1928 /* Context where memory should be allocated. */
1929 struct bfd_link_info
*info
;
1932 bfd_boolean error_p
;
1935 /* Process a single entry from DIFF got. Add or update corresponding
1936 entry in the BIG got. */
1939 elf_m68k_merge_gots_1 (void **entry_ptr
, void *_arg
)
1941 const struct elf_m68k_got_entry
*from
;
1942 struct elf_m68k_merge_gots_arg
*arg
;
1943 struct elf_m68k_got_entry
*to
;
1945 from
= (const struct elf_m68k_got_entry
*) *entry_ptr
;
1946 arg
= (struct elf_m68k_merge_gots_arg
*) _arg
;
1948 to
= elf_m68k_get_got_entry (arg
->big
, &from
->key_
, FIND_OR_CREATE
,
1952 arg
->error_p
= TRUE
;
1956 BFD_ASSERT (to
->u
.s1
.refcount
== 0);
1957 /* All we need to merge is TYPE. */
1958 to
->key_
.type
= from
->key_
.type
;
1963 /* Merge data from DIFF to BIG. INFO is context where memory should be
1967 elf_m68k_merge_gots (struct elf_m68k_got
*big
,
1968 struct elf_m68k_got
*diff
,
1969 struct bfd_link_info
*info
)
1971 if (diff
->entries
!= NULL
)
1972 /* DIFF is not empty. Merge it into BIG GOT. */
1974 struct elf_m68k_merge_gots_arg arg_
;
1976 /* Merge entries. */
1979 arg_
.error_p
= FALSE
;
1980 htab_traverse_noresize (diff
->entries
, elf_m68k_merge_gots_1
, &arg_
);
1984 /* Merge counters. */
1985 big
->n_slots
[R_8
] += diff
->n_slots
[R_8
];
1986 big
->n_slots
[R_16
] += diff
->n_slots
[R_16
];
1987 big
->n_slots
[R_32
] += diff
->n_slots
[R_32
];
1988 big
->local_n_slots
+= diff
->local_n_slots
;
1991 /* DIFF is empty. */
1993 BFD_ASSERT (diff
->n_slots
[R_8
] == 0);
1994 BFD_ASSERT (diff
->n_slots
[R_16
] == 0);
1995 BFD_ASSERT (diff
->n_slots
[R_32
] == 0);
1996 BFD_ASSERT (diff
->local_n_slots
== 0);
1999 BFD_ASSERT (!elf_m68k_hash_table (info
)->allow_multigot_p
2000 || ((big
->n_slots
[R_8
]
2001 <= ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info
))
2002 && (big
->n_slots
[R_16
]
2003 <= ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info
))));
2008 struct elf_m68k_finalize_got_offsets_arg
2010 /* Ranges of the offsets for GOT entries.
2011 R_x entries receive offsets between offset1[R_x] and offset2[R_x].
2012 R_x is R_8, R_16 and R_32. */
2016 /* Mapping from global symndx to global symbols.
2017 This is used to build lists of got entries for global symbols. */
2018 struct elf_m68k_link_hash_entry
**symndx2h
;
2020 bfd_vma n_ldm_entries
;
2023 /* Assign ENTRY an offset. Build list of GOT entries for global symbols
2027 elf_m68k_finalize_got_offsets_1 (void **entry_ptr
, void *_arg
)
2029 struct elf_m68k_got_entry
*entry
;
2030 struct elf_m68k_finalize_got_offsets_arg
*arg
;
2032 enum elf_m68k_got_offset_size got_offset_size
;
2035 entry
= (struct elf_m68k_got_entry
*) *entry_ptr
;
2036 arg
= (struct elf_m68k_finalize_got_offsets_arg
*) _arg
;
2038 /* This should be a fresh entry created in elf_m68k_can_merge_gots. */
2039 BFD_ASSERT (entry
->u
.s1
.refcount
== 0);
2041 /* Get GOT offset size for the entry . */
2042 got_offset_size
= elf_m68k_reloc_got_offset_size (entry
->key_
.type
);
2044 /* Calculate entry size in bytes. */
2045 entry_size
= 4 * elf_m68k_reloc_got_n_slots (entry
->key_
.type
);
2047 /* Check if we should switch to negative range of the offsets. */
2048 if (arg
->offset1
[got_offset_size
] + entry_size
2049 > arg
->offset2
[got_offset_size
])
2051 /* Verify that this is the only switch to negative range for
2052 got_offset_size. If this assertion fails, then we've miscalculated
2053 range for got_offset_size entries in
2054 elf_m68k_finalize_got_offsets. */
2055 BFD_ASSERT (arg
->offset2
[got_offset_size
]
2056 != arg
->offset2
[-(int) got_offset_size
- 1]);
2059 arg
->offset1
[got_offset_size
] = arg
->offset1
[-(int) got_offset_size
- 1];
2060 arg
->offset2
[got_offset_size
] = arg
->offset2
[-(int) got_offset_size
- 1];
2062 /* Verify that now we have enough room for the entry. */
2063 BFD_ASSERT (arg
->offset1
[got_offset_size
] + entry_size
2064 <= arg
->offset2
[got_offset_size
]);
2067 /* Assign offset to entry. */
2068 entry
->u
.s2
.offset
= arg
->offset1
[got_offset_size
];
2069 arg
->offset1
[got_offset_size
] += entry_size
;
2071 if (entry
->key_
.bfd
== NULL
)
2072 /* Hook up this entry into the list of got_entries of H. */
2074 struct elf_m68k_link_hash_entry
*h
;
2076 h
= arg
->symndx2h
[entry
->key_
.symndx
];
2079 entry
->u
.s2
.next
= h
->glist
;
2083 /* This should be the entry for TLS_LDM relocation then. */
2085 BFD_ASSERT ((elf_m68k_reloc_got_type (entry
->key_
.type
)
2087 && entry
->key_
.symndx
== 0);
2089 ++arg
->n_ldm_entries
;
2093 /* This entry is for local symbol. */
2094 entry
->u
.s2
.next
= NULL
;
2099 /* Assign offsets within GOT. USE_NEG_GOT_OFFSETS_P indicates if we
2100 should use negative offsets.
2101 Build list of GOT entries for global symbols along the way.
2102 SYMNDX2H is mapping from global symbol indices to actual
2104 Return offset at which next GOT should start. */
2107 elf_m68k_finalize_got_offsets (struct elf_m68k_got
*got
,
2108 bfd_boolean use_neg_got_offsets_p
,
2109 struct elf_m68k_link_hash_entry
**symndx2h
,
2110 bfd_vma
*final_offset
, bfd_vma
*n_ldm_entries
)
2112 struct elf_m68k_finalize_got_offsets_arg arg_
;
2113 bfd_vma offset1_
[2 * R_LAST
];
2114 bfd_vma offset2_
[2 * R_LAST
];
2116 bfd_vma start_offset
;
2118 BFD_ASSERT (got
->offset
!= (bfd_vma
) -1);
2120 /* We set entry offsets relative to the .got section (and not the
2121 start of a particular GOT), so that we can use them in
2122 finish_dynamic_symbol without needing to know the GOT which they come
2125 /* Put offset1 in the middle of offset1_, same for offset2. */
2126 arg_
.offset1
= offset1_
+ R_LAST
;
2127 arg_
.offset2
= offset2_
+ R_LAST
;
2129 start_offset
= got
->offset
;
2131 if (use_neg_got_offsets_p
)
2132 /* Setup both negative and positive ranges for R_8, R_16 and R_32. */
2133 i
= -(int) R_32
- 1;
2135 /* Setup positives ranges for R_8, R_16 and R_32. */
2138 for (; i
<= (int) R_32
; ++i
)
2143 /* Set beginning of the range of offsets I. */
2144 arg_
.offset1
[i
] = start_offset
;
2146 /* Calculate number of slots that require I offsets. */
2147 j
= (i
>= 0) ? i
: -i
- 1;
2148 n
= (j
>= 1) ? got
->n_slots
[j
- 1] : 0;
2149 n
= got
->n_slots
[j
] - n
;
2151 if (use_neg_got_offsets_p
&& n
!= 0)
2154 /* We first fill the positive side of the range, so we might
2155 end up with one empty slot at that side when we can't fit
2156 whole 2-slot entry. Account for that at negative side of
2157 the interval with one additional entry. */
2160 /* When the number of slots is odd, make positive side of the
2161 range one entry bigger. */
2165 /* N is the number of slots that require I offsets.
2166 Calculate length of the range for I offsets. */
2169 /* Set end of the range. */
2170 arg_
.offset2
[i
] = start_offset
+ n
;
2172 start_offset
= arg_
.offset2
[i
];
2175 if (!use_neg_got_offsets_p
)
2176 /* Make sure that if we try to switch to negative offsets in
2177 elf_m68k_finalize_got_offsets_1, the assert therein will catch
2179 for (i
= R_8
; i
<= R_32
; ++i
)
2180 arg_
.offset2
[-i
- 1] = arg_
.offset2
[i
];
2182 /* Setup got->offset. offset1[R_8] is either in the middle or at the
2183 beginning of GOT depending on use_neg_got_offsets_p. */
2184 got
->offset
= arg_
.offset1
[R_8
];
2186 arg_
.symndx2h
= symndx2h
;
2187 arg_
.n_ldm_entries
= 0;
2189 /* Assign offsets. */
2190 htab_traverse (got
->entries
, elf_m68k_finalize_got_offsets_1
, &arg_
);
2192 /* Check offset ranges we have actually assigned. */
2193 for (i
= (int) R_8
; i
<= (int) R_32
; ++i
)
2194 BFD_ASSERT (arg_
.offset2
[i
] - arg_
.offset1
[i
] <= 4);
2196 *final_offset
= start_offset
;
2197 *n_ldm_entries
= arg_
.n_ldm_entries
;
2200 struct elf_m68k_partition_multi_got_arg
2202 /* The GOT we are adding entries to. Aka big got. */
2203 struct elf_m68k_got
*current_got
;
2205 /* Offset to assign the next CURRENT_GOT. */
2208 /* Context where memory should be allocated. */
2209 struct bfd_link_info
*info
;
2211 /* Total number of slots in the .got section.
2212 This is used to calculate size of the .got and .rela.got sections. */
2215 /* Difference in numbers of allocated slots in the .got section
2216 and necessary relocations in the .rela.got section.
2217 This is used to calculate size of the .rela.got section. */
2218 bfd_vma slots_relas_diff
;
2221 bfd_boolean error_p
;
2223 /* Mapping from global symndx to global symbols.
2224 This is used to build lists of got entries for global symbols. */
2225 struct elf_m68k_link_hash_entry
**symndx2h
;
2229 elf_m68k_partition_multi_got_2 (struct elf_m68k_partition_multi_got_arg
*arg
)
2231 bfd_vma n_ldm_entries
;
2233 elf_m68k_finalize_got_offsets (arg
->current_got
,
2234 (elf_m68k_hash_table (arg
->info
)
2235 ->use_neg_got_offsets_p
),
2237 &arg
->offset
, &n_ldm_entries
);
2239 arg
->n_slots
+= arg
->current_got
->n_slots
[R_32
];
2241 if (!arg
->info
->shared
)
2242 /* If we are generating a shared object, we need to
2243 output a R_68K_RELATIVE reloc so that the dynamic
2244 linker can adjust this GOT entry. Overwise we
2245 don't need space in .rela.got for local symbols. */
2246 arg
->slots_relas_diff
+= arg
->current_got
->local_n_slots
;
2248 /* @LDM relocations require a 2-slot GOT entry, but only
2249 one relocation. Account for that. */
2250 arg
->slots_relas_diff
+= n_ldm_entries
;
2252 BFD_ASSERT (arg
->slots_relas_diff
<= arg
->n_slots
);
2256 /* Process a single BFD2GOT entry and either merge GOT to CURRENT_GOT
2257 or start a new CURRENT_GOT. */
2260 elf_m68k_partition_multi_got_1 (void **_entry
, void *_arg
)
2262 struct elf_m68k_bfd2got_entry
*entry
;
2263 struct elf_m68k_partition_multi_got_arg
*arg
;
2264 struct elf_m68k_got
*got
;
2265 struct elf_m68k_got diff_
;
2266 struct elf_m68k_got
*diff
;
2268 entry
= (struct elf_m68k_bfd2got_entry
*) *_entry
;
2269 arg
= (struct elf_m68k_partition_multi_got_arg
*) _arg
;
2272 BFD_ASSERT (got
!= NULL
);
2273 BFD_ASSERT (got
->offset
== (bfd_vma
) -1);
2277 if (arg
->current_got
!= NULL
)
2278 /* Construct diff. */
2281 elf_m68k_init_got (diff
);
2283 if (!elf_m68k_can_merge_gots (arg
->current_got
, got
, arg
->info
, diff
))
2285 if (diff
->offset
== 0)
2286 /* Offset set to 0 in the diff_ indicates an error. */
2288 arg
->error_p
= TRUE
;
2292 if (elf_m68k_hash_table (arg
->info
)->allow_multigot_p
)
2294 elf_m68k_clear_got (diff
);
2295 /* Schedule to finish up current_got and start new one. */
2299 Merge GOTs no matter what. If big GOT overflows,
2300 we'll fail in relocate_section due to truncated relocations.
2302 ??? May be fail earlier? E.g., in can_merge_gots. */
2306 /* Diff of got against empty current_got is got itself. */
2308 /* Create empty current_got to put subsequent GOTs to. */
2309 arg
->current_got
= elf_m68k_create_empty_got (arg
->info
);
2310 if (arg
->current_got
== NULL
)
2312 arg
->error_p
= TRUE
;
2316 arg
->current_got
->offset
= arg
->offset
;
2323 if (!elf_m68k_merge_gots (arg
->current_got
, diff
, arg
->info
))
2325 arg
->error_p
= TRUE
;
2329 /* Now we can free GOT. */
2330 elf_m68k_clear_got (got
);
2332 entry
->got
= arg
->current_got
;
2336 /* Finish up current_got. */
2337 elf_m68k_partition_multi_got_2 (arg
);
2339 /* Schedule to start a new current_got. */
2340 arg
->current_got
= NULL
;
2343 if (!elf_m68k_partition_multi_got_1 (_entry
, _arg
))
2345 BFD_ASSERT (arg
->error_p
);
2352 elf_m68k_clear_got (diff
);
2354 return arg
->error_p
== FALSE
? 1 : 0;
2357 /* Helper function to build symndx2h mapping. */
2360 elf_m68k_init_symndx2h_1 (struct elf_link_hash_entry
*_h
,
2363 struct elf_m68k_link_hash_entry
*h
;
2365 h
= elf_m68k_hash_entry (_h
);
2367 if (h
->got_entry_key
!= 0)
2368 /* H has at least one entry in the GOT. */
2370 struct elf_m68k_partition_multi_got_arg
*arg
;
2372 arg
= (struct elf_m68k_partition_multi_got_arg
*) _arg
;
2374 BFD_ASSERT (arg
->symndx2h
[h
->got_entry_key
] == NULL
);
2375 arg
->symndx2h
[h
->got_entry_key
] = h
;
2381 /* Merge GOTs of some BFDs, assign offsets to GOT entries and build
2382 lists of GOT entries for global symbols.
2383 Calculate sizes of .got and .rela.got sections. */
2386 elf_m68k_partition_multi_got (struct bfd_link_info
*info
)
2388 struct elf_m68k_multi_got
*multi_got
;
2389 struct elf_m68k_partition_multi_got_arg arg_
;
2391 multi_got
= elf_m68k_multi_got (info
);
2393 arg_
.current_got
= NULL
;
2397 arg_
.slots_relas_diff
= 0;
2398 arg_
.error_p
= FALSE
;
2400 if (multi_got
->bfd2got
!= NULL
)
2402 /* Initialize symndx2h mapping. */
2404 arg_
.symndx2h
= bfd_zmalloc (multi_got
->global_symndx
2405 * sizeof (*arg_
.symndx2h
));
2406 if (arg_
.symndx2h
== NULL
)
2409 elf_link_hash_traverse (elf_hash_table (info
),
2410 elf_m68k_init_symndx2h_1
, &arg_
);
2414 htab_traverse (multi_got
->bfd2got
, elf_m68k_partition_multi_got_1
,
2418 free (arg_
.symndx2h
);
2419 arg_
.symndx2h
= NULL
;
2424 /* Finish up last current_got. */
2425 elf_m68k_partition_multi_got_2 (&arg_
);
2427 free (arg_
.symndx2h
);
2430 if (elf_hash_table (info
)->dynobj
!= NULL
)
2431 /* Set sizes of .got and .rela.got sections. */
2435 s
= bfd_get_linker_section (elf_hash_table (info
)->dynobj
, ".got");
2437 s
->size
= arg_
.offset
;
2439 BFD_ASSERT (arg_
.offset
== 0);
2441 BFD_ASSERT (arg_
.slots_relas_diff
<= arg_
.n_slots
);
2442 arg_
.n_slots
-= arg_
.slots_relas_diff
;
2444 s
= bfd_get_linker_section (elf_hash_table (info
)->dynobj
, ".rela.got");
2446 s
->size
= arg_
.n_slots
* sizeof (Elf32_External_Rela
);
2448 BFD_ASSERT (arg_
.n_slots
== 0);
2451 BFD_ASSERT (multi_got
->bfd2got
== NULL
);
2456 /* Specialized version of elf_m68k_get_got_entry that returns pointer
2457 to hashtable slot, thus allowing removal of entry via
2458 elf_m68k_remove_got_entry. */
2460 static struct elf_m68k_got_entry
**
2461 elf_m68k_find_got_entry_ptr (struct elf_m68k_got
*got
,
2462 struct elf_m68k_got_entry_key
*key
)
2465 struct elf_m68k_got_entry entry_
;
2466 struct elf_m68k_got_entry
**entry_ptr
;
2469 ptr
= htab_find_slot (got
->entries
, &entry_
, NO_INSERT
);
2470 BFD_ASSERT (ptr
!= NULL
);
2472 entry_ptr
= (struct elf_m68k_got_entry
**) ptr
;
2477 /* Remove entry pointed to by ENTRY_PTR from GOT. */
2480 elf_m68k_remove_got_entry (struct elf_m68k_got
*got
,
2481 struct elf_m68k_got_entry
**entry_ptr
)
2483 struct elf_m68k_got_entry
*entry
;
2487 /* Check that offsets have not been finalized yet. */
2488 BFD_ASSERT (got
->offset
== (bfd_vma
) -1);
2489 /* Check that this entry is indeed unused. */
2490 BFD_ASSERT (entry
->u
.s1
.refcount
== 0);
2492 elf_m68k_remove_got_entry_type (got
, entry
->key_
.type
);
2494 if (entry
->key_
.bfd
!= NULL
)
2495 got
->local_n_slots
-= elf_m68k_reloc_got_n_slots (entry
->key_
.type
);
2497 BFD_ASSERT (got
->n_slots
[R_32
] >= got
->local_n_slots
);
2499 htab_clear_slot (got
->entries
, (void **) entry_ptr
);
2502 /* Copy any information related to dynamic linking from a pre-existing
2503 symbol to a newly created symbol. Also called to copy flags and
2504 other back-end info to a weakdef, in which case the symbol is not
2505 newly created and plt/got refcounts and dynamic indices should not
2509 elf_m68k_copy_indirect_symbol (struct bfd_link_info
*info
,
2510 struct elf_link_hash_entry
*_dir
,
2511 struct elf_link_hash_entry
*_ind
)
2513 struct elf_m68k_link_hash_entry
*dir
;
2514 struct elf_m68k_link_hash_entry
*ind
;
2516 _bfd_elf_link_hash_copy_indirect (info
, _dir
, _ind
);
2518 if (_ind
->root
.type
!= bfd_link_hash_indirect
)
2521 dir
= elf_m68k_hash_entry (_dir
);
2522 ind
= elf_m68k_hash_entry (_ind
);
2524 /* Any absolute non-dynamic relocations against an indirect or weak
2525 definition will be against the target symbol. */
2526 _dir
->non_got_ref
|= _ind
->non_got_ref
;
2528 /* We might have a direct symbol already having entries in the GOTs.
2529 Update its key only in case indirect symbol has GOT entries and
2530 assert that both indirect and direct symbols don't have GOT entries
2531 at the same time. */
2532 if (ind
->got_entry_key
!= 0)
2534 BFD_ASSERT (dir
->got_entry_key
== 0);
2535 /* Assert that GOTs aren't partioned yet. */
2536 BFD_ASSERT (ind
->glist
== NULL
);
2538 dir
->got_entry_key
= ind
->got_entry_key
;
2539 ind
->got_entry_key
= 0;
2543 /* Look through the relocs for a section during the first phase, and
2544 allocate space in the global offset table or procedure linkage
2548 elf_m68k_check_relocs (bfd
*abfd
,
2549 struct bfd_link_info
*info
,
2551 const Elf_Internal_Rela
*relocs
)
2554 Elf_Internal_Shdr
*symtab_hdr
;
2555 struct elf_link_hash_entry
**sym_hashes
;
2556 const Elf_Internal_Rela
*rel
;
2557 const Elf_Internal_Rela
*rel_end
;
2561 struct elf_m68k_got
*got
;
2563 if (info
->relocatable
)
2566 dynobj
= elf_hash_table (info
)->dynobj
;
2567 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2568 sym_hashes
= elf_sym_hashes (abfd
);
2576 rel_end
= relocs
+ sec
->reloc_count
;
2577 for (rel
= relocs
; rel
< rel_end
; rel
++)
2579 unsigned long r_symndx
;
2580 struct elf_link_hash_entry
*h
;
2582 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2584 if (r_symndx
< symtab_hdr
->sh_info
)
2588 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2589 while (h
->root
.type
== bfd_link_hash_indirect
2590 || h
->root
.type
== bfd_link_hash_warning
)
2591 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2594 switch (ELF32_R_TYPE (rel
->r_info
))
2600 && strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
2604 /* Relative GOT relocations. */
2610 /* TLS relocations. */
2612 case R_68K_TLS_GD16
:
2613 case R_68K_TLS_GD32
:
2614 case R_68K_TLS_LDM8
:
2615 case R_68K_TLS_LDM16
:
2616 case R_68K_TLS_LDM32
:
2618 case R_68K_TLS_IE16
:
2619 case R_68K_TLS_IE32
:
2621 case R_68K_TLS_TPREL32
:
2622 case R_68K_TLS_DTPREL32
:
2624 if (ELF32_R_TYPE (rel
->r_info
) == R_68K_TLS_TPREL32
2626 /* Do the special chorus for libraries with static TLS. */
2627 info
->flags
|= DF_STATIC_TLS
;
2629 /* This symbol requires a global offset table entry. */
2633 /* Create the .got section. */
2634 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2635 if (!_bfd_elf_create_got_section (dynobj
, info
))
2641 sgot
= bfd_get_linker_section (dynobj
, ".got");
2642 BFD_ASSERT (sgot
!= NULL
);
2646 && (h
!= NULL
|| info
->shared
))
2648 srelgot
= bfd_get_linker_section (dynobj
, ".rela.got");
2649 if (srelgot
== NULL
)
2651 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
2652 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
2654 srelgot
= bfd_make_section_anyway_with_flags (dynobj
,
2658 || !bfd_set_section_alignment (dynobj
, srelgot
, 2))
2665 struct elf_m68k_bfd2got_entry
*bfd2got_entry
;
2668 = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info
),
2669 abfd
, FIND_OR_CREATE
, info
);
2670 if (bfd2got_entry
== NULL
)
2673 got
= bfd2got_entry
->got
;
2674 BFD_ASSERT (got
!= NULL
);
2678 struct elf_m68k_got_entry
*got_entry
;
2680 /* Add entry to got. */
2681 got_entry
= elf_m68k_add_entry_to_got (got
, h
, abfd
,
2682 ELF32_R_TYPE (rel
->r_info
),
2684 if (got_entry
== NULL
)
2687 if (got_entry
->u
.s1
.refcount
== 1)
2689 /* Make sure this symbol is output as a dynamic symbol. */
2692 && !h
->forced_local
)
2694 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
2705 /* This symbol requires a procedure linkage table entry. We
2706 actually build the entry in adjust_dynamic_symbol,
2707 because this might be a case of linking PIC code which is
2708 never referenced by a dynamic object, in which case we
2709 don't need to generate a procedure linkage table entry
2712 /* If this is a local symbol, we resolve it directly without
2713 creating a procedure linkage table entry. */
2724 /* This symbol requires a procedure linkage table entry. */
2728 /* It does not make sense to have this relocation for a
2729 local symbol. FIXME: does it? How to handle it if
2730 it does make sense? */
2731 bfd_set_error (bfd_error_bad_value
);
2735 /* Make sure this symbol is output as a dynamic symbol. */
2736 if (h
->dynindx
== -1
2737 && !h
->forced_local
)
2739 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
2750 /* If we are creating a shared library and this is not a local
2751 symbol, we need to copy the reloc into the shared library.
2752 However when linking with -Bsymbolic and this is a global
2753 symbol which is defined in an object we are including in the
2754 link (i.e., DEF_REGULAR is set), then we can resolve the
2755 reloc directly. At this point we have not seen all the input
2756 files, so it is possible that DEF_REGULAR is not set now but
2757 will be set later (it is never cleared). We account for that
2758 possibility below by storing information in the
2759 pcrel_relocs_copied field of the hash table entry. */
2761 && (sec
->flags
& SEC_ALLOC
) != 0
2764 || h
->root
.type
== bfd_link_hash_defweak
2765 || !h
->def_regular
)))
2769 /* Make sure a plt entry is created for this symbol if
2770 it turns out to be a function defined by a dynamic
2780 /* We don't need to handle relocs into sections not going into
2781 the "real" output. */
2782 if ((sec
->flags
& SEC_ALLOC
) == 0)
2787 /* Make sure a plt entry is created for this symbol if it
2788 turns out to be a function defined by a dynamic object. */
2791 if (info
->executable
)
2792 /* This symbol needs a non-GOT reference. */
2796 /* If we are creating a shared library, we need to copy the
2797 reloc into the shared library. */
2800 /* When creating a shared object, we must copy these
2801 reloc types into the output file. We create a reloc
2802 section in dynobj and make room for this reloc. */
2805 sreloc
= _bfd_elf_make_dynamic_reloc_section
2806 (sec
, dynobj
, 2, abfd
, /*rela?*/ TRUE
);
2812 if (sec
->flags
& SEC_READONLY
2813 /* Don't set DF_TEXTREL yet for PC relative
2814 relocations, they might be discarded later. */
2815 && !(ELF32_R_TYPE (rel
->r_info
) == R_68K_PC8
2816 || ELF32_R_TYPE (rel
->r_info
) == R_68K_PC16
2817 || ELF32_R_TYPE (rel
->r_info
) == R_68K_PC32
))
2818 info
->flags
|= DF_TEXTREL
;
2820 sreloc
->size
+= sizeof (Elf32_External_Rela
);
2822 /* We count the number of PC relative relocations we have
2823 entered for this symbol, so that we can discard them
2824 again if, in the -Bsymbolic case, the symbol is later
2825 defined by a regular object, or, in the normal shared
2826 case, the symbol is forced to be local. Note that this
2827 function is only called if we are using an m68kelf linker
2828 hash table, which means that h is really a pointer to an
2829 elf_m68k_link_hash_entry. */
2830 if (ELF32_R_TYPE (rel
->r_info
) == R_68K_PC8
2831 || ELF32_R_TYPE (rel
->r_info
) == R_68K_PC16
2832 || ELF32_R_TYPE (rel
->r_info
) == R_68K_PC32
)
2834 struct elf_m68k_pcrel_relocs_copied
*p
;
2835 struct elf_m68k_pcrel_relocs_copied
**head
;
2839 struct elf_m68k_link_hash_entry
*eh
2840 = elf_m68k_hash_entry (h
);
2841 head
= &eh
->pcrel_relocs_copied
;
2847 Elf_Internal_Sym
*isym
;
2849 isym
= bfd_sym_from_r_symndx (&elf_m68k_hash_table (info
)->sym_cache
,
2854 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2858 vpp
= &elf_section_data (s
)->local_dynrel
;
2859 head
= (struct elf_m68k_pcrel_relocs_copied
**) vpp
;
2862 for (p
= *head
; p
!= NULL
; p
= p
->next
)
2863 if (p
->section
== sreloc
)
2868 p
= ((struct elf_m68k_pcrel_relocs_copied
*)
2869 bfd_alloc (dynobj
, (bfd_size_type
) sizeof *p
));
2874 p
->section
= sreloc
;
2884 /* This relocation describes the C++ object vtable hierarchy.
2885 Reconstruct it for later use during GC. */
2886 case R_68K_GNU_VTINHERIT
:
2887 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2891 /* This relocation describes which C++ vtable entries are actually
2892 used. Record for later use during GC. */
2893 case R_68K_GNU_VTENTRY
:
2894 BFD_ASSERT (h
!= NULL
);
2896 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2908 /* Return the section that should be marked against GC for a given
2912 elf_m68k_gc_mark_hook (asection
*sec
,
2913 struct bfd_link_info
*info
,
2914 Elf_Internal_Rela
*rel
,
2915 struct elf_link_hash_entry
*h
,
2916 Elf_Internal_Sym
*sym
)
2919 switch (ELF32_R_TYPE (rel
->r_info
))
2921 case R_68K_GNU_VTINHERIT
:
2922 case R_68K_GNU_VTENTRY
:
2926 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2929 /* Update the got entry reference counts for the section being removed. */
2932 elf_m68k_gc_sweep_hook (bfd
*abfd
,
2933 struct bfd_link_info
*info
,
2935 const Elf_Internal_Rela
*relocs
)
2937 Elf_Internal_Shdr
*symtab_hdr
;
2938 struct elf_link_hash_entry
**sym_hashes
;
2939 const Elf_Internal_Rela
*rel
, *relend
;
2941 struct elf_m68k_got
*got
;
2943 if (info
->relocatable
)
2946 dynobj
= elf_hash_table (info
)->dynobj
;
2950 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2951 sym_hashes
= elf_sym_hashes (abfd
);
2954 relend
= relocs
+ sec
->reloc_count
;
2955 for (rel
= relocs
; rel
< relend
; rel
++)
2957 unsigned long r_symndx
;
2958 struct elf_link_hash_entry
*h
= NULL
;
2960 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2961 if (r_symndx
>= symtab_hdr
->sh_info
)
2963 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2964 while (h
->root
.type
== bfd_link_hash_indirect
2965 || h
->root
.type
== bfd_link_hash_warning
)
2966 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2969 switch (ELF32_R_TYPE (rel
->r_info
))
2975 && strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
2984 /* TLS relocations. */
2986 case R_68K_TLS_GD16
:
2987 case R_68K_TLS_GD32
:
2988 case R_68K_TLS_LDM8
:
2989 case R_68K_TLS_LDM16
:
2990 case R_68K_TLS_LDM32
:
2992 case R_68K_TLS_IE16
:
2993 case R_68K_TLS_IE32
:
2995 case R_68K_TLS_TPREL32
:
2996 case R_68K_TLS_DTPREL32
:
3000 got
= elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info
),
3001 abfd
, MUST_FIND
, NULL
)->got
;
3002 BFD_ASSERT (got
!= NULL
);
3006 struct elf_m68k_got_entry_key key_
;
3007 struct elf_m68k_got_entry
**got_entry_ptr
;
3008 struct elf_m68k_got_entry
*got_entry
;
3010 elf_m68k_init_got_entry_key (&key_
, h
, abfd
, r_symndx
,
3011 ELF32_R_TYPE (rel
->r_info
));
3012 got_entry_ptr
= elf_m68k_find_got_entry_ptr (got
, &key_
);
3014 got_entry
= *got_entry_ptr
;
3016 if (got_entry
->u
.s1
.refcount
> 0)
3018 --got_entry
->u
.s1
.refcount
;
3020 if (got_entry
->u
.s1
.refcount
== 0)
3021 /* We don't need the .got entry any more. */
3022 elf_m68k_remove_got_entry (got
, got_entry_ptr
);
3041 if (h
->plt
.refcount
> 0)
3054 /* Return the type of PLT associated with OUTPUT_BFD. */
3056 static const struct elf_m68k_plt_info
*
3057 elf_m68k_get_plt_info (bfd
*output_bfd
)
3059 unsigned int features
;
3061 features
= bfd_m68k_mach_to_features (bfd_get_mach (output_bfd
));
3062 if (features
& cpu32
)
3063 return &elf_cpu32_plt_info
;
3064 if (features
& mcfisa_b
)
3065 return &elf_isab_plt_info
;
3066 if (features
& mcfisa_c
)
3067 return &elf_isac_plt_info
;
3068 return &elf_m68k_plt_info
;
3071 /* This function is called after all the input files have been read,
3072 and the input sections have been assigned to output sections.
3073 It's a convenient place to determine the PLT style. */
3076 elf_m68k_always_size_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
3078 /* Bind input BFDs to GOTs and calculate sizes of .got and .rela.got
3080 if (!elf_m68k_partition_multi_got (info
))
3083 elf_m68k_hash_table (info
)->plt_info
= elf_m68k_get_plt_info (output_bfd
);
3087 /* Adjust a symbol defined by a dynamic object and referenced by a
3088 regular object. The current definition is in some section of the
3089 dynamic object, but we're not including those sections. We have to
3090 change the definition to something the rest of the link can
3094 elf_m68k_adjust_dynamic_symbol (struct bfd_link_info
*info
,
3095 struct elf_link_hash_entry
*h
)
3097 struct elf_m68k_link_hash_table
*htab
;
3101 htab
= elf_m68k_hash_table (info
);
3102 dynobj
= elf_hash_table (info
)->dynobj
;
3104 /* Make sure we know what is going on here. */
3105 BFD_ASSERT (dynobj
!= NULL
3107 || h
->u
.weakdef
!= NULL
3110 && !h
->def_regular
)));
3112 /* If this is a function, put it in the procedure linkage table. We
3113 will fill in the contents of the procedure linkage table later,
3114 when we know the address of the .got section. */
3115 if (h
->type
== STT_FUNC
3118 if ((h
->plt
.refcount
<= 0
3119 || SYMBOL_CALLS_LOCAL (info
, h
)
3120 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
3121 && h
->root
.type
== bfd_link_hash_undefweak
))
3122 /* We must always create the plt entry if it was referenced
3123 by a PLTxxO relocation. In this case we already recorded
3124 it as a dynamic symbol. */
3125 && h
->dynindx
== -1)
3127 /* This case can occur if we saw a PLTxx reloc in an input
3128 file, but the symbol was never referred to by a dynamic
3129 object, or if all references were garbage collected. In
3130 such a case, we don't actually need to build a procedure
3131 linkage table, and we can just do a PCxx reloc instead. */
3132 h
->plt
.offset
= (bfd_vma
) -1;
3137 /* Make sure this symbol is output as a dynamic symbol. */
3138 if (h
->dynindx
== -1
3139 && !h
->forced_local
)
3141 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3145 s
= bfd_get_linker_section (dynobj
, ".plt");
3146 BFD_ASSERT (s
!= NULL
);
3148 /* If this is the first .plt entry, make room for the special
3151 s
->size
= htab
->plt_info
->size
;
3153 /* If this symbol is not defined in a regular file, and we are
3154 not generating a shared library, then set the symbol to this
3155 location in the .plt. This is required to make function
3156 pointers compare as equal between the normal executable and
3157 the shared library. */
3161 h
->root
.u
.def
.section
= s
;
3162 h
->root
.u
.def
.value
= s
->size
;
3165 h
->plt
.offset
= s
->size
;
3167 /* Make room for this entry. */
3168 s
->size
+= htab
->plt_info
->size
;
3170 /* We also need to make an entry in the .got.plt section, which
3171 will be placed in the .got section by the linker script. */
3172 s
= bfd_get_linker_section (dynobj
, ".got.plt");
3173 BFD_ASSERT (s
!= NULL
);
3176 /* We also need to make an entry in the .rela.plt section. */
3177 s
= bfd_get_linker_section (dynobj
, ".rela.plt");
3178 BFD_ASSERT (s
!= NULL
);
3179 s
->size
+= sizeof (Elf32_External_Rela
);
3184 /* Reinitialize the plt offset now that it is not used as a reference
3186 h
->plt
.offset
= (bfd_vma
) -1;
3188 /* If this is a weak symbol, and there is a real definition, the
3189 processor independent code will have arranged for us to see the
3190 real definition first, and we can just use the same value. */
3191 if (h
->u
.weakdef
!= NULL
)
3193 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
3194 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
3195 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
3196 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
3200 /* This is a reference to a symbol defined by a dynamic object which
3201 is not a function. */
3203 /* If we are creating a shared library, we must presume that the
3204 only references to the symbol are via the global offset table.
3205 For such cases we need not do anything here; the relocations will
3206 be handled correctly by relocate_section. */
3210 /* If there are no references to this symbol that do not use the
3211 GOT, we don't need to generate a copy reloc. */
3212 if (!h
->non_got_ref
)
3215 /* We must allocate the symbol in our .dynbss section, which will
3216 become part of the .bss section of the executable. There will be
3217 an entry for this symbol in the .dynsym section. The dynamic
3218 object will contain position independent code, so all references
3219 from the dynamic object to this symbol will go through the global
3220 offset table. The dynamic linker will use the .dynsym entry to
3221 determine the address it must put in the global offset table, so
3222 both the dynamic object and the regular object will refer to the
3223 same memory location for the variable. */
3225 s
= bfd_get_linker_section (dynobj
, ".dynbss");
3226 BFD_ASSERT (s
!= NULL
);
3228 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
3229 copy the initial value out of the dynamic object and into the
3230 runtime process image. We need to remember the offset into the
3231 .rela.bss section we are going to use. */
3232 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
3236 srel
= bfd_get_linker_section (dynobj
, ".rela.bss");
3237 BFD_ASSERT (srel
!= NULL
);
3238 srel
->size
+= sizeof (Elf32_External_Rela
);
3242 return _bfd_elf_adjust_dynamic_copy (h
, s
);
3245 /* Set the sizes of the dynamic sections. */
3248 elf_m68k_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3249 struct bfd_link_info
*info
)
3256 dynobj
= elf_hash_table (info
)->dynobj
;
3257 BFD_ASSERT (dynobj
!= NULL
);
3259 if (elf_hash_table (info
)->dynamic_sections_created
)
3261 /* Set the contents of the .interp section to the interpreter. */
3262 if (info
->executable
)
3264 s
= bfd_get_linker_section (dynobj
, ".interp");
3265 BFD_ASSERT (s
!= NULL
);
3266 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
3267 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
3272 /* We may have created entries in the .rela.got section.
3273 However, if we are not creating the dynamic sections, we will
3274 not actually use these entries. Reset the size of .rela.got,
3275 which will cause it to get stripped from the output file
3277 s
= bfd_get_linker_section (dynobj
, ".rela.got");
3282 /* If this is a -Bsymbolic shared link, then we need to discard all
3283 PC relative relocs against symbols defined in a regular object.
3284 For the normal shared case we discard the PC relative relocs
3285 against symbols that have become local due to visibility changes.
3286 We allocated space for them in the check_relocs routine, but we
3287 will not fill them in in the relocate_section routine. */
3289 elf_link_hash_traverse (elf_hash_table (info
),
3290 elf_m68k_discard_copies
,
3293 /* The check_relocs and adjust_dynamic_symbol entry points have
3294 determined the sizes of the various dynamic sections. Allocate
3298 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3302 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3305 /* It's OK to base decisions on the section name, because none
3306 of the dynobj section names depend upon the input files. */
3307 name
= bfd_get_section_name (dynobj
, s
);
3309 if (strcmp (name
, ".plt") == 0)
3311 /* Remember whether there is a PLT. */
3314 else if (CONST_STRNEQ (name
, ".rela"))
3320 /* We use the reloc_count field as a counter if we need
3321 to copy relocs into the output file. */
3325 else if (! CONST_STRNEQ (name
, ".got")
3326 && strcmp (name
, ".dynbss") != 0)
3328 /* It's not one of our sections, so don't allocate space. */
3334 /* If we don't need this section, strip it from the
3335 output file. This is mostly to handle .rela.bss and
3336 .rela.plt. We must create both sections in
3337 create_dynamic_sections, because they must be created
3338 before the linker maps input sections to output
3339 sections. The linker does that before
3340 adjust_dynamic_symbol is called, and it is that
3341 function which decides whether anything needs to go
3342 into these sections. */
3343 s
->flags
|= SEC_EXCLUDE
;
3347 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3350 /* Allocate memory for the section contents. */
3351 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3352 Unused entries should be reclaimed before the section's contents
3353 are written out, but at the moment this does not happen. Thus in
3354 order to prevent writing out garbage, we initialise the section's
3355 contents to zero. */
3356 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3357 if (s
->contents
== NULL
)
3361 if (elf_hash_table (info
)->dynamic_sections_created
)
3363 /* Add some entries to the .dynamic section. We fill in the
3364 values later, in elf_m68k_finish_dynamic_sections, but we
3365 must add the entries now so that we get the correct size for
3366 the .dynamic section. The DT_DEBUG entry is filled in by the
3367 dynamic linker and used by the debugger. */
3368 #define add_dynamic_entry(TAG, VAL) \
3369 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3373 if (!add_dynamic_entry (DT_DEBUG
, 0))
3379 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3380 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3381 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3382 || !add_dynamic_entry (DT_JMPREL
, 0))
3388 if (!add_dynamic_entry (DT_RELA
, 0)
3389 || !add_dynamic_entry (DT_RELASZ
, 0)
3390 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3394 if ((info
->flags
& DF_TEXTREL
) != 0)
3396 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3400 #undef add_dynamic_entry
3405 /* This function is called via elf_link_hash_traverse if we are
3406 creating a shared object. In the -Bsymbolic case it discards the
3407 space allocated to copy PC relative relocs against symbols which
3408 are defined in regular objects. For the normal shared case, it
3409 discards space for pc-relative relocs that have become local due to
3410 symbol visibility changes. We allocated space for them in the
3411 check_relocs routine, but we won't fill them in in the
3412 relocate_section routine.
3414 We also check whether any of the remaining relocations apply
3415 against a readonly section, and set the DF_TEXTREL flag in this
3419 elf_m68k_discard_copies (struct elf_link_hash_entry
*h
,
3422 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3423 struct elf_m68k_pcrel_relocs_copied
*s
;
3425 if (!SYMBOL_CALLS_LOCAL (info
, h
))
3427 if ((info
->flags
& DF_TEXTREL
) == 0)
3429 /* Look for relocations against read-only sections. */
3430 for (s
= elf_m68k_hash_entry (h
)->pcrel_relocs_copied
;
3433 if ((s
->section
->flags
& SEC_READONLY
) != 0)
3435 info
->flags
|= DF_TEXTREL
;
3440 /* Make sure undefined weak symbols are output as a dynamic symbol
3443 && h
->root
.type
== bfd_link_hash_undefweak
3444 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3446 && !h
->forced_local
)
3448 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3455 for (s
= elf_m68k_hash_entry (h
)->pcrel_relocs_copied
;
3458 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
3464 /* Install relocation RELA. */
3467 elf_m68k_install_rela (bfd
*output_bfd
,
3469 Elf_Internal_Rela
*rela
)
3473 loc
= srela
->contents
;
3474 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3475 bfd_elf32_swap_reloca_out (output_bfd
, rela
, loc
);
3478 /* Find the base offsets for thread-local storage in this object,
3479 for GD/LD and IE/LE respectively. */
3481 #define DTP_OFFSET 0x8000
3482 #define TP_OFFSET 0x7000
3485 dtpoff_base (struct bfd_link_info
*info
)
3487 /* If tls_sec is NULL, we should have signalled an error already. */
3488 if (elf_hash_table (info
)->tls_sec
== NULL
)
3490 return elf_hash_table (info
)->tls_sec
->vma
+ DTP_OFFSET
;
3494 tpoff_base (struct bfd_link_info
*info
)
3496 /* If tls_sec is NULL, we should have signalled an error already. */
3497 if (elf_hash_table (info
)->tls_sec
== NULL
)
3499 return elf_hash_table (info
)->tls_sec
->vma
+ TP_OFFSET
;
3502 /* Output necessary relocation to handle a symbol during static link.
3503 This function is called from elf_m68k_relocate_section. */
3506 elf_m68k_init_got_entry_static (struct bfd_link_info
*info
,
3508 enum elf_m68k_reloc_type r_type
,
3510 bfd_vma got_entry_offset
,
3513 switch (elf_m68k_reloc_got_type (r_type
))
3516 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ got_entry_offset
);
3519 case R_68K_TLS_GD32
:
3520 /* We know the offset within the module,
3521 put it into the second GOT slot. */
3522 bfd_put_32 (output_bfd
, relocation
- dtpoff_base (info
),
3523 sgot
->contents
+ got_entry_offset
+ 4);
3526 case R_68K_TLS_LDM32
:
3527 /* Mark it as belonging to module 1, the executable. */
3528 bfd_put_32 (output_bfd
, 1, sgot
->contents
+ got_entry_offset
);
3531 case R_68K_TLS_IE32
:
3532 bfd_put_32 (output_bfd
, relocation
- tpoff_base (info
),
3533 sgot
->contents
+ got_entry_offset
);
3541 /* Output necessary relocation to handle a local symbol
3542 during dynamic link.
3543 This function is called either from elf_m68k_relocate_section
3544 or from elf_m68k_finish_dynamic_symbol. */
3547 elf_m68k_init_got_entry_local_shared (struct bfd_link_info
*info
,
3549 enum elf_m68k_reloc_type r_type
,
3551 bfd_vma got_entry_offset
,
3555 Elf_Internal_Rela outrel
;
3557 switch (elf_m68k_reloc_got_type (r_type
))
3560 /* Emit RELATIVE relocation to initialize GOT slot
3562 outrel
.r_info
= ELF32_R_INFO (0, R_68K_RELATIVE
);
3563 outrel
.r_addend
= relocation
;
3566 case R_68K_TLS_GD32
:
3567 /* We know the offset within the module,
3568 put it into the second GOT slot. */
3569 bfd_put_32 (output_bfd
, relocation
- dtpoff_base (info
),
3570 sgot
->contents
+ got_entry_offset
+ 4);
3573 case R_68K_TLS_LDM32
:
3574 /* We don't know the module number,
3575 create a relocation for it. */
3576 outrel
.r_info
= ELF32_R_INFO (0, R_68K_TLS_DTPMOD32
);
3577 outrel
.r_addend
= 0;
3580 case R_68K_TLS_IE32
:
3581 /* Emit TPREL relocation to initialize GOT slot
3583 outrel
.r_info
= ELF32_R_INFO (0, R_68K_TLS_TPREL32
);
3584 outrel
.r_addend
= relocation
- elf_hash_table (info
)->tls_sec
->vma
;
3591 /* Offset of the GOT entry. */
3592 outrel
.r_offset
= (sgot
->output_section
->vma
3593 + sgot
->output_offset
3594 + got_entry_offset
);
3596 /* Install one of the above relocations. */
3597 elf_m68k_install_rela (output_bfd
, srela
, &outrel
);
3599 bfd_put_32 (output_bfd
, outrel
.r_addend
, sgot
->contents
+ got_entry_offset
);
3602 /* Relocate an M68K ELF section. */
3605 elf_m68k_relocate_section (bfd
*output_bfd
,
3606 struct bfd_link_info
*info
,
3608 asection
*input_section
,
3610 Elf_Internal_Rela
*relocs
,
3611 Elf_Internal_Sym
*local_syms
,
3612 asection
**local_sections
)
3615 Elf_Internal_Shdr
*symtab_hdr
;
3616 struct elf_link_hash_entry
**sym_hashes
;
3621 struct elf_m68k_got
*got
;
3622 Elf_Internal_Rela
*rel
;
3623 Elf_Internal_Rela
*relend
;
3625 dynobj
= elf_hash_table (info
)->dynobj
;
3626 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3627 sym_hashes
= elf_sym_hashes (input_bfd
);
3637 relend
= relocs
+ input_section
->reloc_count
;
3638 for (; rel
< relend
; rel
++)
3641 reloc_howto_type
*howto
;
3642 unsigned long r_symndx
;
3643 struct elf_link_hash_entry
*h
;
3644 Elf_Internal_Sym
*sym
;
3647 bfd_boolean unresolved_reloc
;
3648 bfd_reloc_status_type r
;
3650 r_type
= ELF32_R_TYPE (rel
->r_info
);
3651 if (r_type
< 0 || r_type
>= (int) R_68K_max
)
3653 bfd_set_error (bfd_error_bad_value
);
3656 howto
= howto_table
+ r_type
;
3658 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3663 unresolved_reloc
= FALSE
;
3665 if (r_symndx
< symtab_hdr
->sh_info
)
3667 sym
= local_syms
+ r_symndx
;
3668 sec
= local_sections
[r_symndx
];
3669 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
3675 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3676 r_symndx
, symtab_hdr
, sym_hashes
,
3678 unresolved_reloc
, warned
);
3681 if (sec
!= NULL
&& discarded_section (sec
))
3682 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3683 rel
, 1, relend
, howto
, 0, contents
);
3685 if (info
->relocatable
)
3693 /* Relocation is to the address of the entry for this symbol
3694 in the global offset table. */
3696 && strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
3698 if (elf_m68k_hash_table (info
)->local_gp_p
)
3700 bfd_vma sgot_output_offset
;
3705 sgot
= bfd_get_linker_section (dynobj
, ".got");
3708 sgot_output_offset
= sgot
->output_offset
;
3710 /* In this case we have a reference to
3711 _GLOBAL_OFFSET_TABLE_, but the GOT itself is
3713 ??? Issue a warning? */
3714 sgot_output_offset
= 0;
3717 sgot_output_offset
= sgot
->output_offset
;
3721 struct elf_m68k_bfd2got_entry
*bfd2got_entry
;
3724 = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info
),
3725 input_bfd
, SEARCH
, NULL
);
3727 if (bfd2got_entry
!= NULL
)
3729 got
= bfd2got_entry
->got
;
3730 BFD_ASSERT (got
!= NULL
);
3732 got_offset
= got
->offset
;
3735 /* In this case we have a reference to
3736 _GLOBAL_OFFSET_TABLE_, but no other references
3737 accessing any GOT entries.
3738 ??? Issue a warning? */
3742 got_offset
= got
->offset
;
3744 /* Adjust GOT pointer to point to the GOT
3745 assigned to input_bfd. */
3746 rel
->r_addend
+= sgot_output_offset
+ got_offset
;
3749 BFD_ASSERT (got
== NULL
|| got
->offset
== 0);
3758 case R_68K_TLS_LDM32
:
3759 case R_68K_TLS_LDM16
:
3760 case R_68K_TLS_LDM8
:
3763 case R_68K_TLS_GD16
:
3764 case R_68K_TLS_GD32
:
3767 case R_68K_TLS_IE16
:
3768 case R_68K_TLS_IE32
:
3770 /* Relocation is the offset of the entry for this symbol in
3771 the global offset table. */
3774 struct elf_m68k_got_entry_key key_
;
3780 sgot
= bfd_get_linker_section (dynobj
, ".got");
3781 BFD_ASSERT (sgot
!= NULL
);
3786 got
= elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info
),
3787 input_bfd
, MUST_FIND
,
3789 BFD_ASSERT (got
!= NULL
);
3792 /* Get GOT offset for this symbol. */
3793 elf_m68k_init_got_entry_key (&key_
, h
, input_bfd
, r_symndx
,
3795 off_ptr
= &elf_m68k_get_got_entry (got
, &key_
, MUST_FIND
,
3799 /* The offset must always be a multiple of 4. We use
3800 the least significant bit to record whether we have
3801 already generated the necessary reloc. */
3807 /* @TLSLDM relocations are bounded to the module, in
3808 which the symbol is defined -- not to the symbol
3810 && elf_m68k_reloc_got_type (r_type
) != R_68K_TLS_LDM32
)
3814 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
3815 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3817 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3818 || (ELF_ST_VISIBILITY (h
->other
)
3819 && h
->root
.type
== bfd_link_hash_undefweak
))
3821 /* This is actually a static link, or it is a
3822 -Bsymbolic link and the symbol is defined
3823 locally, or the symbol was forced to be local
3824 because of a version file. We must initialize
3825 this entry in the global offset table. Since
3826 the offset must always be a multiple of 4, we
3827 use the least significant bit to record whether
3828 we have initialized it already.
3830 When doing a dynamic link, we create a .rela.got
3831 relocation entry to initialize the value. This
3832 is done in the finish_dynamic_symbol routine. */
3834 elf_m68k_init_got_entry_static (info
,
3844 unresolved_reloc
= FALSE
;
3846 else if (info
->shared
) /* && h == NULL */
3847 /* Process local symbol during dynamic link. */
3851 srela
= bfd_get_linker_section (dynobj
, ".rela.got");
3852 BFD_ASSERT (srela
!= NULL
);
3855 elf_m68k_init_got_entry_local_shared (info
,
3865 else /* h == NULL && !info->shared */
3867 elf_m68k_init_got_entry_static (info
,
3878 /* We don't use elf_m68k_reloc_got_type in the condition below
3879 because this is the only place where difference between
3880 R_68K_GOTx and R_68K_GOTxO relocations matters. */
3881 if (r_type
== R_68K_GOT32O
3882 || r_type
== R_68K_GOT16O
3883 || r_type
== R_68K_GOT8O
3884 || elf_m68k_reloc_got_type (r_type
) == R_68K_TLS_GD32
3885 || elf_m68k_reloc_got_type (r_type
) == R_68K_TLS_LDM32
3886 || elf_m68k_reloc_got_type (r_type
) == R_68K_TLS_IE32
)
3888 /* GOT pointer is adjusted to point to the start/middle
3889 of local GOT. Adjust the offset accordingly. */
3890 BFD_ASSERT (elf_m68k_hash_table (info
)->use_neg_got_offsets_p
3891 || off
>= got
->offset
);
3893 if (elf_m68k_hash_table (info
)->local_gp_p
)
3894 relocation
= off
- got
->offset
;
3897 BFD_ASSERT (got
->offset
== 0);
3898 relocation
= sgot
->output_offset
+ off
;
3901 /* This relocation does not use the addend. */
3905 relocation
= (sgot
->output_section
->vma
+ sgot
->output_offset
3910 case R_68K_TLS_LDO32
:
3911 case R_68K_TLS_LDO16
:
3912 case R_68K_TLS_LDO8
:
3913 relocation
-= dtpoff_base (info
);
3916 case R_68K_TLS_LE32
:
3917 case R_68K_TLS_LE16
:
3919 if (info
->shared
&& !info
->pie
)
3921 (*_bfd_error_handler
)
3922 (_("%B(%A+0x%lx): R_68K_TLS_LE32 relocation not permitted "
3923 "in shared object"),
3924 input_bfd
, input_section
, (long) rel
->r_offset
, howto
->name
);
3929 relocation
-= tpoff_base (info
);
3936 /* Relocation is to the entry for this symbol in the
3937 procedure linkage table. */
3939 /* Resolve a PLTxx reloc against a local symbol directly,
3940 without using the procedure linkage table. */
3944 if (h
->plt
.offset
== (bfd_vma
) -1
3945 || !elf_hash_table (info
)->dynamic_sections_created
)
3947 /* We didn't make a PLT entry for this symbol. This
3948 happens when statically linking PIC code, or when
3949 using -Bsymbolic. */
3955 splt
= bfd_get_linker_section (dynobj
, ".plt");
3956 BFD_ASSERT (splt
!= NULL
);
3959 relocation
= (splt
->output_section
->vma
3960 + splt
->output_offset
3962 unresolved_reloc
= FALSE
;
3968 /* Relocation is the offset of the entry for this symbol in
3969 the procedure linkage table. */
3970 BFD_ASSERT (h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1);
3974 splt
= bfd_get_linker_section (dynobj
, ".plt");
3975 BFD_ASSERT (splt
!= NULL
);
3978 relocation
= h
->plt
.offset
;
3979 unresolved_reloc
= FALSE
;
3981 /* This relocation does not use the addend. */
3993 && r_symndx
!= STN_UNDEF
3994 && (input_section
->flags
& SEC_ALLOC
) != 0
3996 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3997 || h
->root
.type
!= bfd_link_hash_undefweak
)
3998 && ((r_type
!= R_68K_PC8
3999 && r_type
!= R_68K_PC16
4000 && r_type
!= R_68K_PC32
)
4001 || !SYMBOL_CALLS_LOCAL (info
, h
)))
4003 Elf_Internal_Rela outrel
;
4005 bfd_boolean skip
, relocate
;
4007 /* When generating a shared object, these relocations
4008 are copied into the output file to be resolved at run
4015 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4017 if (outrel
.r_offset
== (bfd_vma
) -1)
4019 else if (outrel
.r_offset
== (bfd_vma
) -2)
4020 skip
= TRUE
, relocate
= TRUE
;
4021 outrel
.r_offset
+= (input_section
->output_section
->vma
4022 + input_section
->output_offset
);
4025 memset (&outrel
, 0, sizeof outrel
);
4028 && (r_type
== R_68K_PC8
4029 || r_type
== R_68K_PC16
4030 || r_type
== R_68K_PC32
4033 || !h
->def_regular
))
4035 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4036 outrel
.r_addend
= rel
->r_addend
;
4040 /* This symbol is local, or marked to become local. */
4041 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4043 if (r_type
== R_68K_32
)
4046 outrel
.r_info
= ELF32_R_INFO (0, R_68K_RELATIVE
);
4052 if (bfd_is_abs_section (sec
))
4054 else if (sec
== NULL
|| sec
->owner
== NULL
)
4056 bfd_set_error (bfd_error_bad_value
);
4063 /* We are turning this relocation into one
4064 against a section symbol. It would be
4065 proper to subtract the symbol's value,
4066 osec->vma, from the emitted reloc addend,
4067 but ld.so expects buggy relocs. */
4068 osec
= sec
->output_section
;
4069 indx
= elf_section_data (osec
)->dynindx
;
4072 struct elf_link_hash_table
*htab
;
4073 htab
= elf_hash_table (info
);
4074 osec
= htab
->text_index_section
;
4075 indx
= elf_section_data (osec
)->dynindx
;
4077 BFD_ASSERT (indx
!= 0);
4080 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
4084 sreloc
= elf_section_data (input_section
)->sreloc
;
4088 loc
= sreloc
->contents
;
4089 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rela
);
4090 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
4092 /* This reloc will be computed at runtime, so there's no
4093 need to do anything now, except for R_68K_32
4094 relocations that have been turned into
4102 case R_68K_GNU_VTINHERIT
:
4103 case R_68K_GNU_VTENTRY
:
4104 /* These are no-ops in the end. */
4111 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4112 because such sections are not SEC_ALLOC and thus ld.so will
4113 not process them. */
4114 if (unresolved_reloc
4115 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4117 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4118 rel
->r_offset
) != (bfd_vma
) -1)
4120 (*_bfd_error_handler
)
4121 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4124 (long) rel
->r_offset
,
4126 h
->root
.root
.string
);
4130 if (r_symndx
!= STN_UNDEF
4131 && r_type
!= R_68K_NONE
4133 || h
->root
.type
== bfd_link_hash_defined
4134 || h
->root
.type
== bfd_link_hash_defweak
))
4138 sym_type
= (sym
!= NULL
) ? ELF32_ST_TYPE (sym
->st_info
) : h
->type
;
4140 if (elf_m68k_reloc_tls_p (r_type
) != (sym_type
== STT_TLS
))
4145 name
= h
->root
.root
.string
;
4148 name
= (bfd_elf_string_from_elf_section
4149 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4150 if (name
== NULL
|| *name
== '\0')
4151 name
= bfd_section_name (input_bfd
, sec
);
4154 (*_bfd_error_handler
)
4155 ((sym_type
== STT_TLS
4156 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4157 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4160 (long) rel
->r_offset
,
4166 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4167 contents
, rel
->r_offset
,
4168 relocation
, rel
->r_addend
);
4170 if (r
!= bfd_reloc_ok
)
4175 name
= h
->root
.root
.string
;
4178 name
= bfd_elf_string_from_elf_section (input_bfd
,
4179 symtab_hdr
->sh_link
,
4184 name
= bfd_section_name (input_bfd
, sec
);
4187 if (r
== bfd_reloc_overflow
)
4189 if (!(info
->callbacks
->reloc_overflow
4190 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4191 (bfd_vma
) 0, input_bfd
, input_section
,
4197 (*_bfd_error_handler
)
4198 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4199 input_bfd
, input_section
,
4200 (long) rel
->r_offset
, name
, (int) r
);
4209 /* Install an M_68K_PC32 relocation against VALUE at offset OFFSET
4210 into section SEC. */
4213 elf_m68k_install_pc32 (asection
*sec
, bfd_vma offset
, bfd_vma value
)
4215 /* Make VALUE PC-relative. */
4216 value
-= sec
->output_section
->vma
+ offset
;
4218 /* Apply any in-place addend. */
4219 value
+= bfd_get_32 (sec
->owner
, sec
->contents
+ offset
);
4221 bfd_put_32 (sec
->owner
, value
, sec
->contents
+ offset
);
4224 /* Finish up dynamic symbol handling. We set the contents of various
4225 dynamic sections here. */
4228 elf_m68k_finish_dynamic_symbol (bfd
*output_bfd
,
4229 struct bfd_link_info
*info
,
4230 struct elf_link_hash_entry
*h
,
4231 Elf_Internal_Sym
*sym
)
4235 dynobj
= elf_hash_table (info
)->dynobj
;
4237 if (h
->plt
.offset
!= (bfd_vma
) -1)
4239 const struct elf_m68k_plt_info
*plt_info
;
4245 Elf_Internal_Rela rela
;
4248 /* This symbol has an entry in the procedure linkage table. Set
4251 BFD_ASSERT (h
->dynindx
!= -1);
4253 plt_info
= elf_m68k_hash_table (info
)->plt_info
;
4254 splt
= bfd_get_linker_section (dynobj
, ".plt");
4255 sgot
= bfd_get_linker_section (dynobj
, ".got.plt");
4256 srela
= bfd_get_linker_section (dynobj
, ".rela.plt");
4257 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
4259 /* Get the index in the procedure linkage table which
4260 corresponds to this symbol. This is the index of this symbol
4261 in all the symbols for which we are making plt entries. The
4262 first entry in the procedure linkage table is reserved. */
4263 plt_index
= (h
->plt
.offset
/ plt_info
->size
) - 1;
4265 /* Get the offset into the .got table of the entry that
4266 corresponds to this function. Each .got entry is 4 bytes.
4267 The first three are reserved. */
4268 got_offset
= (plt_index
+ 3) * 4;
4270 memcpy (splt
->contents
+ h
->plt
.offset
,
4271 plt_info
->symbol_entry
,
4274 elf_m68k_install_pc32 (splt
, h
->plt
.offset
+ plt_info
->symbol_relocs
.got
,
4275 (sgot
->output_section
->vma
4276 + sgot
->output_offset
4279 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rela
),
4282 + plt_info
->symbol_resolve_entry
+ 2);
4284 elf_m68k_install_pc32 (splt
, h
->plt
.offset
+ plt_info
->symbol_relocs
.plt
,
4285 splt
->output_section
->vma
);
4287 /* Fill in the entry in the global offset table. */
4288 bfd_put_32 (output_bfd
,
4289 (splt
->output_section
->vma
4290 + splt
->output_offset
4292 + plt_info
->symbol_resolve_entry
),
4293 sgot
->contents
+ got_offset
);
4295 /* Fill in the entry in the .rela.plt section. */
4296 rela
.r_offset
= (sgot
->output_section
->vma
4297 + sgot
->output_offset
4299 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_68K_JMP_SLOT
);
4301 loc
= srela
->contents
+ plt_index
* sizeof (Elf32_External_Rela
);
4302 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
4304 if (!h
->def_regular
)
4306 /* Mark the symbol as undefined, rather than as defined in
4307 the .plt section. Leave the value alone. */
4308 sym
->st_shndx
= SHN_UNDEF
;
4312 if (elf_m68k_hash_entry (h
)->glist
!= NULL
)
4316 struct elf_m68k_got_entry
*got_entry
;
4318 /* This symbol has an entry in the global offset table. Set it
4321 sgot
= bfd_get_linker_section (dynobj
, ".got");
4322 srela
= bfd_get_linker_section (dynobj
, ".rela.got");
4323 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
4325 got_entry
= elf_m68k_hash_entry (h
)->glist
;
4327 while (got_entry
!= NULL
)
4329 enum elf_m68k_reloc_type r_type
;
4330 bfd_vma got_entry_offset
;
4332 r_type
= got_entry
->key_
.type
;
4333 got_entry_offset
= got_entry
->u
.s2
.offset
&~ (bfd_vma
) 1;
4335 /* If this is a -Bsymbolic link, and the symbol is defined
4336 locally, we just want to emit a RELATIVE reloc. Likewise if
4337 the symbol was forced to be local because of a version file.
4338 The entry in the global offset table already have been
4339 initialized in the relocate_section function. */
4341 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4345 relocation
= bfd_get_signed_32 (output_bfd
,
4347 + got_entry_offset
));
4350 switch (elf_m68k_reloc_got_type (r_type
))
4353 case R_68K_TLS_LDM32
:
4356 case R_68K_TLS_GD32
:
4357 /* The value for this relocation is actually put in
4358 the second GOT slot. */
4359 relocation
= bfd_get_signed_32 (output_bfd
,
4361 + got_entry_offset
+ 4));
4362 relocation
+= dtpoff_base (info
);
4365 case R_68K_TLS_IE32
:
4366 relocation
+= tpoff_base (info
);
4373 elf_m68k_init_got_entry_local_shared (info
,
4383 Elf_Internal_Rela rela
;
4385 /* Put zeros to GOT slots that will be initialized
4390 n_slots
= elf_m68k_reloc_got_n_slots (got_entry
->key_
.type
);
4392 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4393 (sgot
->contents
+ got_entry_offset
4398 rela
.r_offset
= (sgot
->output_section
->vma
4399 + sgot
->output_offset
4400 + got_entry_offset
);
4402 switch (elf_m68k_reloc_got_type (r_type
))
4405 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_68K_GLOB_DAT
);
4406 elf_m68k_install_rela (output_bfd
, srela
, &rela
);
4409 case R_68K_TLS_GD32
:
4410 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_68K_TLS_DTPMOD32
);
4411 elf_m68k_install_rela (output_bfd
, srela
, &rela
);
4414 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_68K_TLS_DTPREL32
);
4415 elf_m68k_install_rela (output_bfd
, srela
, &rela
);
4418 case R_68K_TLS_IE32
:
4419 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_68K_TLS_TPREL32
);
4420 elf_m68k_install_rela (output_bfd
, srela
, &rela
);
4429 got_entry
= got_entry
->u
.s2
.next
;
4436 Elf_Internal_Rela rela
;
4439 /* This symbol needs a copy reloc. Set it up. */
4441 BFD_ASSERT (h
->dynindx
!= -1
4442 && (h
->root
.type
== bfd_link_hash_defined
4443 || h
->root
.type
== bfd_link_hash_defweak
));
4445 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
4446 BFD_ASSERT (s
!= NULL
);
4448 rela
.r_offset
= (h
->root
.u
.def
.value
4449 + h
->root
.u
.def
.section
->output_section
->vma
4450 + h
->root
.u
.def
.section
->output_offset
);
4451 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_68K_COPY
);
4453 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
4454 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
4460 /* Finish up the dynamic sections. */
4463 elf_m68k_finish_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
4469 dynobj
= elf_hash_table (info
)->dynobj
;
4471 sgot
= bfd_get_linker_section (dynobj
, ".got.plt");
4472 BFD_ASSERT (sgot
!= NULL
);
4473 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4475 if (elf_hash_table (info
)->dynamic_sections_created
)
4478 Elf32_External_Dyn
*dyncon
, *dynconend
;
4480 splt
= bfd_get_linker_section (dynobj
, ".plt");
4481 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
4483 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4484 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4485 for (; dyncon
< dynconend
; dyncon
++)
4487 Elf_Internal_Dyn dyn
;
4491 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4504 s
= bfd_get_section_by_name (output_bfd
, name
);
4505 BFD_ASSERT (s
!= NULL
);
4506 dyn
.d_un
.d_ptr
= s
->vma
;
4507 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4511 s
= bfd_get_section_by_name (output_bfd
, ".rela.plt");
4512 BFD_ASSERT (s
!= NULL
);
4513 dyn
.d_un
.d_val
= s
->size
;
4514 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4518 /* The procedure linkage table relocs (DT_JMPREL) should
4519 not be included in the overall relocs (DT_RELA).
4520 Therefore, we override the DT_RELASZ entry here to
4521 make it not include the JMPREL relocs. Since the
4522 linker script arranges for .rela.plt to follow all
4523 other relocation sections, we don't have to worry
4524 about changing the DT_RELA entry. */
4525 s
= bfd_get_section_by_name (output_bfd
, ".rela.plt");
4527 dyn
.d_un
.d_val
-= s
->size
;
4528 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4533 /* Fill in the first entry in the procedure linkage table. */
4536 const struct elf_m68k_plt_info
*plt_info
;
4538 plt_info
= elf_m68k_hash_table (info
)->plt_info
;
4539 memcpy (splt
->contents
, plt_info
->plt0_entry
, plt_info
->size
);
4541 elf_m68k_install_pc32 (splt
, plt_info
->plt0_relocs
.got4
,
4542 (sgot
->output_section
->vma
4543 + sgot
->output_offset
4546 elf_m68k_install_pc32 (splt
, plt_info
->plt0_relocs
.got8
,
4547 (sgot
->output_section
->vma
4548 + sgot
->output_offset
4551 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
4556 /* Fill in the first three entries in the global offset table. */
4560 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
4562 bfd_put_32 (output_bfd
,
4563 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
4565 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
4566 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
4569 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4574 /* Given a .data section and a .emreloc in-memory section, store
4575 relocation information into the .emreloc section which can be
4576 used at runtime to relocate the section. This is called by the
4577 linker when the --embedded-relocs switch is used. This is called
4578 after the add_symbols entry point has been called for all the
4579 objects, and before the final_link entry point is called. */
4582 bfd_m68k_elf32_create_embedded_relocs (abfd
, info
, datasec
, relsec
, errmsg
)
4584 struct bfd_link_info
*info
;
4589 Elf_Internal_Shdr
*symtab_hdr
;
4590 Elf_Internal_Sym
*isymbuf
= NULL
;
4591 Elf_Internal_Rela
*internal_relocs
= NULL
;
4592 Elf_Internal_Rela
*irel
, *irelend
;
4596 BFD_ASSERT (! info
->relocatable
);
4600 if (datasec
->reloc_count
== 0)
4603 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4605 /* Get a copy of the native relocations. */
4606 internal_relocs
= (_bfd_elf_link_read_relocs
4607 (abfd
, datasec
, NULL
, (Elf_Internal_Rela
*) NULL
,
4608 info
->keep_memory
));
4609 if (internal_relocs
== NULL
)
4612 amt
= (bfd_size_type
) datasec
->reloc_count
* 12;
4613 relsec
->contents
= (bfd_byte
*) bfd_alloc (abfd
, amt
);
4614 if (relsec
->contents
== NULL
)
4617 p
= relsec
->contents
;
4619 irelend
= internal_relocs
+ datasec
->reloc_count
;
4620 for (irel
= internal_relocs
; irel
< irelend
; irel
++, p
+= 12)
4622 asection
*targetsec
;
4624 /* We are going to write a four byte longword into the runtime
4625 reloc section. The longword will be the address in the data
4626 section which must be relocated. It is followed by the name
4627 of the target section NUL-padded or truncated to 8
4630 /* We can only relocate absolute longword relocs at run time. */
4631 if (ELF32_R_TYPE (irel
->r_info
) != (int) R_68K_32
)
4633 *errmsg
= _("unsupported reloc type");
4634 bfd_set_error (bfd_error_bad_value
);
4638 /* Get the target section referred to by the reloc. */
4639 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
4641 /* A local symbol. */
4642 Elf_Internal_Sym
*isym
;
4644 /* Read this BFD's local symbols if we haven't done so already. */
4645 if (isymbuf
== NULL
)
4647 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4648 if (isymbuf
== NULL
)
4649 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
4650 symtab_hdr
->sh_info
, 0,
4652 if (isymbuf
== NULL
)
4656 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
4657 targetsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4662 struct elf_link_hash_entry
*h
;
4664 /* An external symbol. */
4665 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
4666 h
= elf_sym_hashes (abfd
)[indx
];
4667 BFD_ASSERT (h
!= NULL
);
4668 if (h
->root
.type
== bfd_link_hash_defined
4669 || h
->root
.type
== bfd_link_hash_defweak
)
4670 targetsec
= h
->root
.u
.def
.section
;
4675 bfd_put_32 (abfd
, irel
->r_offset
+ datasec
->output_offset
, p
);
4676 memset (p
+ 4, 0, 8);
4677 if (targetsec
!= NULL
)
4678 strncpy ((char *) p
+ 4, targetsec
->output_section
->name
, 8);
4681 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4683 if (internal_relocs
!= NULL
4684 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
4685 free (internal_relocs
);
4689 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4691 if (internal_relocs
!= NULL
4692 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
4693 free (internal_relocs
);
4697 /* Set target options. */
4700 bfd_elf_m68k_set_target_options (struct bfd_link_info
*info
, int got_handling
)
4702 struct elf_m68k_link_hash_table
*htab
;
4703 bfd_boolean use_neg_got_offsets_p
;
4704 bfd_boolean allow_multigot_p
;
4705 bfd_boolean local_gp_p
;
4707 switch (got_handling
)
4712 use_neg_got_offsets_p
= FALSE
;
4713 allow_multigot_p
= FALSE
;
4717 /* --got=negative. */
4719 use_neg_got_offsets_p
= TRUE
;
4720 allow_multigot_p
= FALSE
;
4724 /* --got=multigot. */
4726 use_neg_got_offsets_p
= TRUE
;
4727 allow_multigot_p
= TRUE
;
4735 htab
= elf_m68k_hash_table (info
);
4738 htab
->local_gp_p
= local_gp_p
;
4739 htab
->use_neg_got_offsets_p
= use_neg_got_offsets_p
;
4740 htab
->allow_multigot_p
= allow_multigot_p
;
4744 static enum elf_reloc_type_class
4745 elf32_m68k_reloc_type_class (const Elf_Internal_Rela
*rela
)
4747 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4749 case R_68K_RELATIVE
:
4750 return reloc_class_relative
;
4751 case R_68K_JMP_SLOT
:
4752 return reloc_class_plt
;
4754 return reloc_class_copy
;
4756 return reloc_class_normal
;
4760 /* Return address for Ith PLT stub in section PLT, for relocation REL
4761 or (bfd_vma) -1 if it should not be included. */
4764 elf_m68k_plt_sym_val (bfd_vma i
, const asection
*plt
,
4765 const arelent
*rel ATTRIBUTE_UNUSED
)
4767 return plt
->vma
+ (i
+ 1) * elf_m68k_get_plt_info (plt
->owner
)->size
;
4770 /* Support for core dump NOTE sections. */
4773 elf_m68k_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
4778 switch (note
->descsz
)
4783 case 154: /* Linux/m68k */
4785 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
4788 elf_tdata (abfd
)->core_lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 22);
4797 /* Make a ".reg/999" section. */
4798 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
4799 size
, note
->descpos
+ offset
);
4803 elf_m68k_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
4805 switch (note
->descsz
)
4810 case 124: /* Linux/m68k elf_prpsinfo. */
4811 elf_tdata (abfd
)->core_pid
4812 = bfd_get_32 (abfd
, note
->descdata
+ 12);
4813 elf_tdata (abfd
)->core_program
4814 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
4815 elf_tdata (abfd
)->core_command
4816 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
4819 /* Note that for some reason, a spurious space is tacked
4820 onto the end of the args in some (at least one anyway)
4821 implementations, so strip it off if it exists. */
4823 char *command
= elf_tdata (abfd
)->core_command
;
4824 int n
= strlen (command
);
4826 if (n
> 0 && command
[n
- 1] == ' ')
4827 command
[n
- 1] = '\0';
4833 #define TARGET_BIG_SYM bfd_elf32_m68k_vec
4834 #define TARGET_BIG_NAME "elf32-m68k"
4835 #define ELF_MACHINE_CODE EM_68K
4836 #define ELF_MAXPAGESIZE 0x2000
4837 #define elf_backend_create_dynamic_sections \
4838 _bfd_elf_create_dynamic_sections
4839 #define bfd_elf32_bfd_link_hash_table_create \
4840 elf_m68k_link_hash_table_create
4841 /* ??? Should it be this macro or bfd_elfNN_bfd_link_hash_table_create? */
4842 #define bfd_elf32_bfd_link_hash_table_free \
4843 elf_m68k_link_hash_table_free
4844 #define bfd_elf32_bfd_final_link bfd_elf_final_link
4846 #define elf_backend_check_relocs elf_m68k_check_relocs
4847 #define elf_backend_always_size_sections \
4848 elf_m68k_always_size_sections
4849 #define elf_backend_adjust_dynamic_symbol \
4850 elf_m68k_adjust_dynamic_symbol
4851 #define elf_backend_size_dynamic_sections \
4852 elf_m68k_size_dynamic_sections
4853 #define elf_backend_final_write_processing elf_m68k_final_write_processing
4854 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4855 #define elf_backend_relocate_section elf_m68k_relocate_section
4856 #define elf_backend_finish_dynamic_symbol \
4857 elf_m68k_finish_dynamic_symbol
4858 #define elf_backend_finish_dynamic_sections \
4859 elf_m68k_finish_dynamic_sections
4860 #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook
4861 #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook
4862 #define elf_backend_copy_indirect_symbol elf_m68k_copy_indirect_symbol
4863 #define bfd_elf32_bfd_merge_private_bfd_data \
4864 elf32_m68k_merge_private_bfd_data
4865 #define bfd_elf32_bfd_set_private_flags \
4866 elf32_m68k_set_private_flags
4867 #define bfd_elf32_bfd_print_private_bfd_data \
4868 elf32_m68k_print_private_bfd_data
4869 #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class
4870 #define elf_backend_plt_sym_val elf_m68k_plt_sym_val
4871 #define elf_backend_object_p elf32_m68k_object_p
4872 #define elf_backend_grok_prstatus elf_m68k_grok_prstatus
4873 #define elf_backend_grok_psinfo elf_m68k_grok_psinfo
4875 #define elf_backend_can_gc_sections 1
4876 #define elf_backend_can_refcount 1
4877 #define elf_backend_want_got_plt 1
4878 #define elf_backend_plt_readonly 1
4879 #define elf_backend_want_plt_sym 0
4880 #define elf_backend_got_header_size 12
4881 #define elf_backend_rela_normal 1
4883 #include "elf32-target.h"