1 /* Freescale XGATE-specific support for 32-bit ELF
2 Copyright (C) 2010-2018 Free Software Foundation, Inc.
3 Contributed by Sean Keys(skeys@ipdatasys.com)
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
27 #include "elf/xgate.h"
28 #include "opcode/xgate.h"
29 #include "libiberty.h"
31 /* Forward declarations. */
32 static bfd_reloc_status_type xgate_elf_ignore_reloc
33 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
34 static bfd_reloc_status_type xgate_elf_special_reloc
35 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
37 /* Use REL instead of RELA to save space */
40 static reloc_howto_type elf_xgate_howto_table[] =
42 /* This reloc does nothing. */
43 HOWTO (R_XGATE_NONE, /* type */
45 3, /* size (0 = byte, 1 = short, 2 = long) */
47 FALSE, /* pc_relative */
49 complain_overflow_dont,/* complain_on_overflow */
50 bfd_elf_generic_reloc, /* special_function */
51 "R_XGATE_NONE", /* name */
52 FALSE, /* partial_inplace */
55 FALSE), /* pcrel_offset */
57 /* A 8 bit absolute relocation. */
58 HOWTO (R_XGATE_8, /* type */
60 0, /* size (0 = byte, 1 = short, 2 = long) */
62 FALSE, /* pc_relative */
64 complain_overflow_bitfield, /* complain_on_overflow */
65 bfd_elf_generic_reloc, /* special_function */
66 "R_XGATE_8", /* name */
67 FALSE, /* partial_inplace */
68 0x00ff, /* src_mask */
69 0x00ff, /* dst_mask */
70 FALSE), /* pcrel_offset */
72 /* A 8 bit PC-rel relocation. */
73 HOWTO (R_XGATE_PCREL_8, /* type */
75 0, /* size (0 = byte, 1 = short, 2 = long) */
77 TRUE, /* pc_relative */
79 complain_overflow_bitfield, /* complain_on_overflow */
80 bfd_elf_generic_reloc, /* special_function */
81 "R_XGATE_PCREL_8", /* name */
82 FALSE, /* partial_inplace */
83 0x00ff, /* src_mask */
84 0x00ff, /* dst_mask */
85 TRUE), /* pcrel_offset */
87 /* A 16 bit absolute relocation. */
88 HOWTO (R_XGATE_16, /* type */
90 1, /* size (0 = byte, 1 = short, 2 = long) */
92 FALSE, /* pc_relative */
94 complain_overflow_dont /*bitfield */, /* complain_on_overflow */
95 bfd_elf_generic_reloc, /* special_function */
96 "R_XGATE_16", /* name */
97 FALSE, /* partial_inplace */
98 0xffff, /* src_mask */
99 0xffff, /* dst_mask */
100 FALSE), /* pcrel_offset */
102 /* A 32 bit absolute relocation. This one is never used for the
103 code relocation. It's used by gas for -gstabs generation. */
104 HOWTO (R_XGATE_32, /* type */
106 2, /* size (0 = byte, 1 = short, 2 = long) */
108 FALSE, /* pc_relative */
110 complain_overflow_bitfield, /* complain_on_overflow */
111 bfd_elf_generic_reloc, /* special_function */
112 "R_XGATE_32", /* name */
113 FALSE, /* partial_inplace */
114 0xffffffff, /* src_mask */
115 0xffffffff, /* dst_mask */
116 FALSE), /* pcrel_offset */
118 /* A 16 bit PC-rel relocation. */
119 HOWTO (R_XGATE_PCREL_16, /* type */
121 1, /* size (0 = byte, 1 = short, 2 = long) */
123 TRUE, /* pc_relative */
125 complain_overflow_dont, /* complain_on_overflow */
126 bfd_elf_generic_reloc, /* special_function */
127 "R_XGATE_PCREL_16", /* name */
128 FALSE, /* partial_inplace */
129 0xffff, /* src_mask */
130 0xffff, /* dst_mask */
131 TRUE), /* pcrel_offset */
133 /* GNU extension to record C++ vtable hierarchy. */
134 HOWTO (R_XGATE_GNU_VTINHERIT, /* type */
136 1, /* size (0 = byte, 1 = short, 2 = long) */
138 FALSE, /* pc_relative */
140 complain_overflow_dont, /* complain_on_overflow */
141 NULL, /* special_function */
142 "R_XGATE_GNU_VTINHERIT", /* name */
143 FALSE, /* partial_inplace */
146 FALSE), /* pcrel_offset */
148 /* GNU extension to record C++ vtable member usage. */
149 HOWTO (R_XGATE_GNU_VTENTRY, /* type */
151 1, /* size (0 = byte, 1 = short, 2 = long) */
153 FALSE, /* pc_relative */
155 complain_overflow_dont, /* complain_on_overflow */
156 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
157 "R_XGATE_GNU_VTENTRY", /* name */
158 FALSE, /* partial_inplace */
161 FALSE), /* pcrel_offset */
163 /* A 24 bit relocation. */
164 HOWTO (R_XGATE_24, /* type */
166 1, /* size (0 = byte, 1 = short, 2 = long) */
168 FALSE, /* pc_relative */
170 complain_overflow_dont, /* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_XGATE_IMM8_LO", /* name */
173 FALSE, /* partial_inplace */
174 0x00ff, /* src_mask */
175 0x00ff, /* dst_mask */
176 FALSE), /* pcrel_offset */
178 /* A 16-bit low relocation. */
179 HOWTO (R_XGATE_LO16, /* type */
181 1, /* size (0 = byte, 1 = short, 2 = long) */
183 FALSE, /* pc_relative */
185 complain_overflow_dont, /* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_XGATE_IMM8_HI", /* name */
188 FALSE, /* partial_inplace */
189 0x00ff, /* src_mask */
190 0x00ff, /* dst_mask */
191 FALSE), /* pcrel_offset */
193 /* A page relocation. */
194 HOWTO (R_XGATE_GPAGE, /* type */
196 0, /* size (0 = byte, 1 = short, 2 = long) */
198 FALSE, /* pc_relative */
200 complain_overflow_dont, /* complain_on_overflow */
201 xgate_elf_special_reloc,/* special_function */
202 "R_XGATE_GPAGE", /* name */
203 FALSE, /* partial_inplace */
204 0x00ff, /* src_mask */
205 0x00ff, /* dst_mask */
206 FALSE), /* pcrel_offset */
208 /* A 9 bit absolute relocation. */
209 HOWTO (R_XGATE_PCREL_9, /* type */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
213 TRUE, /* pc_relative */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_XGATE_PCREL_9", /* name */
218 FALSE, /* partial_inplace */
219 0xffff, /* src_mask */
220 0xffff, /* dst_mask */
221 TRUE), /* pcrel_offset */
223 /* A 8 bit absolute relocation (upper address). */
224 HOWTO (R_XGATE_PCREL_10, /* type */
226 0, /* size (0 = byte, 1 = short, 2 = long) */
228 TRUE, /* pc_relative */
230 complain_overflow_dont, /* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_XGATE_PCREL_10", /* name */
233 FALSE, /* partial_inplace */
234 0x00ff, /* src_mask */
235 0x00ff, /* dst_mask */
236 TRUE), /* pcrel_offset */
238 /* A 8 bit absolute relocation. */
239 HOWTO (R_XGATE_IMM8_LO, /* type */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
243 FALSE, /* pc_relative */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_XGATE_IMM8_LO", /* name */
248 FALSE, /* partial_inplace */
249 0xffff, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
253 /* A 16 bit absolute relocation (upper address). */
254 HOWTO (R_XGATE_IMM8_HI, /* type */
256 1, /* size (0 = byte, 1 = short, 2 = long) */
258 FALSE, /* pc_relative */
260 complain_overflow_dont, /* complain_on_overflow */
261 bfd_elf_generic_reloc, /* special_function */
262 "R_XGATE_IMM8_HI", /* name */
263 FALSE, /* partial_inplace */
264 0x00ff, /* src_mask */
265 0x00ff, /* dst_mask */
266 FALSE), /* pcrel_offset */
268 /* A 3 bit absolute relocation. */
269 HOWTO (R_XGATE_IMM3, /* type */
271 1, /* size (0 = byte, 1 = short, 2 = long) */
273 FALSE, /* pc_relative */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_XGATE_IMM3", /* name */
278 FALSE, /* partial_inplace */
279 0x00ff, /* src_mask */
280 0x00ff, /* dst_mask */
281 FALSE), /* pcrel_offset */
283 /* A 4 bit absolute relocation. */
284 HOWTO (R_XGATE_IMM4, /* type */
286 1, /* size (0 = byte, 1 = short, 2 = long) */
288 FALSE, /* pc_relative */
290 complain_overflow_dont, /* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_XGATE_IMM4", /* name */
293 FALSE, /* partial_inplace */
294 0x00ff, /* src_mask */
295 0x00ff, /* dst_mask */
296 FALSE), /* pcrel_offset */
298 /* A 5 bit absolute relocation. */
299 HOWTO (R_XGATE_IMM5, /* type */
301 1, /* size (0 = byte, 1 = short, 2 = long) */
303 FALSE, /* pc_relative */
305 complain_overflow_dont, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_XGATE_IMM5", /* name */
308 FALSE, /* partial_inplace */
309 0x00ff, /* src_mask */
310 0x00ff, /* dst_mask */
311 FALSE), /* pcrel_offset */
313 /* Mark beginning of a jump instruction (any form). */
314 HOWTO (R_XGATE_RL_JUMP, /* type */
316 1, /* size (0 = byte, 1 = short, 2 = long) */
318 FALSE, /* pc_relative */
320 complain_overflow_dont, /* complain_on_overflow */
321 xgate_elf_ignore_reloc, /* special_function */
322 "R_XGATE_RL_JUMP", /* name */
323 TRUE, /* partial_inplace */
326 TRUE), /* pcrel_offset */
328 /* Mark beginning of Gcc relaxation group instruction. */
329 HOWTO (R_XGATE_RL_GROUP, /* type */
331 1, /* size (0 = byte, 1 = short, 2 = long) */
333 FALSE, /* pc_relative */
335 complain_overflow_dont, /* complain_on_overflow */
336 xgate_elf_ignore_reloc, /* special_function */
337 "R_XGATE_RL_GROUP", /* name */
338 TRUE, /* partial_inplace */
341 TRUE), /* pcrel_offset */
344 /* Map BFD reloc types to XGATE ELF reloc types. */
346 struct xgate_reloc_map
348 bfd_reloc_code_real_type bfd_reloc_val;
349 unsigned char elf_reloc_val;
352 static const struct xgate_reloc_map xgate_reloc_map[] =
354 {BFD_RELOC_NONE, R_XGATE_NONE},
355 {BFD_RELOC_8, R_XGATE_8},
356 {BFD_RELOC_8_PCREL, R_XGATE_PCREL_8},
357 {BFD_RELOC_16_PCREL, R_XGATE_PCREL_16},
358 {BFD_RELOC_16, R_XGATE_16},
359 {BFD_RELOC_32, R_XGATE_32},
361 {BFD_RELOC_VTABLE_INHERIT, R_XGATE_GNU_VTINHERIT},
362 {BFD_RELOC_VTABLE_ENTRY, R_XGATE_GNU_VTENTRY},
364 {BFD_RELOC_XGATE_LO16, R_XGATE_LO16},
365 {BFD_RELOC_XGATE_GPAGE, R_XGATE_GPAGE},
366 {BFD_RELOC_XGATE_24, R_XGATE_24},
367 {BFD_RELOC_XGATE_PCREL_9, R_XGATE_PCREL_9},
368 {BFD_RELOC_XGATE_PCREL_10, R_XGATE_PCREL_10},
369 {BFD_RELOC_XGATE_IMM8_LO, R_XGATE_IMM8_LO},
370 {BFD_RELOC_XGATE_IMM8_HI, R_XGATE_IMM8_HI},
371 {BFD_RELOC_XGATE_IMM3, R_XGATE_IMM3},
372 {BFD_RELOC_XGATE_IMM4, R_XGATE_IMM4},
373 {BFD_RELOC_XGATE_IMM5, R_XGATE_IMM5},
375 {BFD_RELOC_XGATE_RL_JUMP, R_XGATE_RL_JUMP},
376 {BFD_RELOC_XGATE_RL_GROUP, R_XGATE_RL_GROUP},
379 static reloc_howto_type *
380 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
381 bfd_reloc_code_real_type code)
385 for (i = 0; i < ARRAY_SIZE (xgate_reloc_map); i++)
386 if (xgate_reloc_map[i].bfd_reloc_val == code)
387 return &elf_xgate_howto_table[xgate_reloc_map[i].elf_reloc_val];
392 static reloc_howto_type *
393 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
397 for (i = 0; i < ARRAY_SIZE (elf_xgate_howto_table); i++)
398 if (elf_xgate_howto_table[i].name != NULL
399 && strcasecmp (elf_xgate_howto_table[i].name, r_name) == 0)
400 return &elf_xgate_howto_table[i];
405 /* Set the howto pointer for an XGATE ELF reloc. */
408 xgate_info_to_howto_rel (bfd *abfd,
410 Elf_Internal_Rela *dst)
414 r_type = ELF32_R_TYPE (dst->r_info);
415 if (r_type >= (unsigned int) R_XGATE_max)
417 /* xgettext:c-format */
418 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
420 bfd_set_error (bfd_error_bad_value);
423 cache_ptr->howto = &elf_xgate_howto_table[r_type];
427 /* Specific sections:
428 - The .page0 is a data section that is mapped in [0x0000..0x00FF].
429 Page0 accesses are faster on the M68HC12.
430 - The .vectors is the section that represents the interrupt
432 - The .xgate section is starts in 0xE08800 or as xgate sees it 0x0800. */
433 static const struct bfd_elf_special_section elf32_xgate_special_sections[] =
435 { STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
436 { STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
437 { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
438 { STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC },
439 /*{ STRING_COMMA_LEN (".xgate"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
440 TODO finish this implementation */
444 /* Hook called when reading symbols. */
447 elf32_xgate_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
450 /* Mark xgate symbols. */
451 ((elf_symbol_type *) sym)->internal_elf_sym.st_target_internal = 1;
454 /* This function is used for relocs which are only used for relaxing,
455 which the linker should otherwise ignore. */
457 static bfd_reloc_status_type
458 xgate_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED,
459 arelent *reloc_entry,
460 asymbol *symbol ATTRIBUTE_UNUSED,
461 void *data ATTRIBUTE_UNUSED,
462 asection *input_section,
464 char **error_message ATTRIBUTE_UNUSED)
466 if (output_bfd != NULL)
467 reloc_entry->address += input_section->output_offset;
471 static bfd_reloc_status_type
472 xgate_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED,
473 arelent *reloc_entry ATTRIBUTE_UNUSED,
474 asymbol *symbol ATTRIBUTE_UNUSED,
475 void *data ATTRIBUTE_UNUSED,
476 asection *input_section ATTRIBUTE_UNUSED,
477 bfd *output_bfd ATTRIBUTE_UNUSED,
478 char **error_message ATTRIBUTE_UNUSED)
484 _bfd_xgate_elf_print_private_bfd_data (bfd *abfd, void *ptr)
486 FILE *file = (FILE *) ptr;
488 BFD_ASSERT (abfd != NULL && ptr != NULL);
490 /* Print normal ELF private data. */
491 _bfd_elf_print_private_bfd_data (abfd, ptr);
493 /* xgettext:c-format */
494 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
496 if (elf_elfheader (abfd)->e_flags & E_XGATE_I32)
497 fprintf (file, _("[abi=32-bit int, "));
499 fprintf (file, _("[abi=16-bit int, "));
501 if (elf_elfheader (abfd)->e_flags & E_XGATE_F64)
502 fprintf (file, _("64-bit double, "));
504 fprintf (file, _("32-bit double, "));
505 if (elf_elfheader (abfd)->e_flags & EF_XGATE_MACH)
506 fprintf (file, _("cpu=XGATE]"));
508 fprintf (file, _("error reading cpu type from elf private data"));
514 #define ELF_ARCH bfd_arch_xgate
515 #define ELF_MACHINE_CODE EM_XGATE
517 #define ELF_MAXPAGESIZE 0x1000
519 #define TARGET_BIG_SYM xgate_elf32_vec
520 #define TARGET_BIG_NAME "elf32-xgate"
522 #define elf_info_to_howto_rel xgate_info_to_howto_rel
523 #define elf_backend_special_sections elf32_xgate_special_sections
524 #define elf_backend_symbol_processing elf32_xgate_backend_symbol_processing
525 #define bfd_elf32_bfd_print_private_bfd_data _bfd_xgate_elf_print_private_bfd_data
527 #include "elf32-target.h"