Add myself as ft32 maintainer for sim.
[deliverable/binutils-gdb.git] / bfd / elf32-ft32.c
CommitLineData
3f8107ab 1/* ft32-specific support for 32-bit ELF.
2571583a 2 Copyright (C) 2013-2017 Free Software Foundation, Inc.
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3
4 Copied from elf32-moxie.c which is..
2571583a 5 Copyright (C) 2009-2017 Free Software Foundation, Inc.
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6 Free Software Foundation, Inc.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 MA 02110-1301, USA. */
24
25#include "sysdep.h"
26#include "bfd.h"
27#include "libbfd.h"
28#include "elf-bfd.h"
29#include "elf/ft32.h"
30
31/* Forward declarations. */
32
33static reloc_howto_type ft32_elf_howto_table [] =
34{
35 /* This reloc does nothing. */
36 HOWTO (R_FT32_NONE, /* type */
37 0, /* rightshift */
38 2, /* size (0 = byte, 1 = short, 2 = long) */
39 32, /* bitsize */
40 FALSE, /* pc_relative */
41 0, /* bitpos */
42 complain_overflow_bitfield, /* complain_on_overflow */
43 bfd_elf_generic_reloc, /* special_function */
44 "R_FT32_NONE", /* name */
45 FALSE, /* partial_inplace */
46 0, /* src_mask */
47 0, /* dst_mask */
48 FALSE), /* pcrel_offset */
49
50 /* A 32 bit absolute relocation. */
51
52 HOWTO (R_FT32_32, /* type */
53 0, /* rightshift */
54 2, /* size (0 = byte, 1 = short, 2 = long) */
55 32, /* bitsize */
56 FALSE, /* pc_relative */
57 0, /* bitpos */
58 complain_overflow_bitfield, /* complain_on_overflow */
59 bfd_elf_generic_reloc, /* special_function */
60 "R_FT32_32", /* name */
61 FALSE, /* partial_inplace */
62 0x00000000, /* src_mask */
63 0xffffffff, /* dst_mask */
64 FALSE), /* pcrel_offset */
65
66 HOWTO (R_FT32_16, /* type */
67 0, /* rightshift */
68 1, /* size (0 = byte, 1 = short, 2 = long) */
69 16, /* bitsize */
70 FALSE, /* pc_relative */
71 0, /* bitpos */
72 complain_overflow_bitfield, /* complain_on_overflow */
73 bfd_elf_generic_reloc, /* special_function */
74 "R_FT32_16", /* name */
75 FALSE, /* partial_inplace */
76 0x00000000, /* src_mask */
77 0x0000ffff, /* dst_mask */
78 FALSE), /* pcrel_offset */
79
80 HOWTO (R_FT32_8, /* type */
81 0, /* rightshift */
82 0, /* size (0 = byte, 1 = short, 2 = long) */
83 8, /* bitsize */
84 FALSE, /* pc_relative */
85 0, /* bitpos */
86 complain_overflow_signed, /* complain_on_overflow */
87 bfd_elf_generic_reloc, /* special_function */
88 "R_FT32_8", /* name */
89 FALSE, /* partial_inplace */
90 0x00000000, /* src_mask */
91 0x000000ff, /* dst_mask */
92 FALSE), /* pcrel_offset */
93
94 HOWTO (R_FT32_10, /* type */
95 0, /* rightshift */
96 1, /* size (0 = byte, 1 = short, 2 = long) */
97 10, /* bitsize */
98 FALSE, /* pc_relative */
99 4, /* bitpos */
100 complain_overflow_signed, /* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_FT32_10", /* name */
103 FALSE, /* partial_inplace */
104 0x00000000, /* src_mask */
105 0x00003ff0, /* dst_mask */
106 FALSE), /* pcrel_offset */
107
108 HOWTO (R_FT32_20, /* type */
109 0, /* rightshift */
110 2, /* size (0 = byte, 1 = short, 2 = long) */
111 20, /* bitsize */
112 FALSE, /* pc_relative */
113 0, /* bitpos */
114 complain_overflow_dont, /* complain_on_overflow */
115 bfd_elf_generic_reloc, /* special_function */
116 "R_FT32_20", /* name */
117 FALSE, /* partial_inplace */
118 0x00000000, /* src_mask */
119 0x000fffff, /* dst_mask */
120 FALSE), /* pcrel_offset */
121
122 HOWTO (R_FT32_17, /* type */
123 0, /* rightshift */
124 2, /* size (0 = byte, 1 = short, 2 = long) */
125 17, /* bitsize */
126 FALSE, /* pc_relative */
127 0, /* bitpos */
128 complain_overflow_dont, /* complain_on_overflow */
129 bfd_elf_generic_reloc, /* special_function */
130 "R_FT32_17", /* name */
131 FALSE, /* partial_inplace */
132 0x00000000, /* src_mask */
133 0x0001ffff, /* dst_mask */
134 FALSE), /* pcrel_offset */
135
136 HOWTO (R_FT32_18, /* type */
137 2, /* rightshift */
138 2, /* size (0 = byte, 1 = short, 2 = long) */
139 18, /* bitsize */
140 FALSE, /* pc_relative */
141 0, /* bitpos */
ef32532f 142 complain_overflow_dont, /* complain_on_overflow */
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143 bfd_elf_generic_reloc, /* special_function */
144 "R_FT32_18", /* name */
145 FALSE, /* partial_inplace */
146 0x00000000, /* src_mask */
147 0x0003ffff, /* dst_mask */
148 FALSE), /* pcrel_offset */
149
150};
151\f
152/* Map BFD reloc types to FT32 ELF reloc types. */
153
154struct ft32_reloc_map
155{
156 bfd_reloc_code_real_type bfd_reloc_val;
157 unsigned int ft32_reloc_val;
158};
159
160static const struct ft32_reloc_map ft32_reloc_map [] =
161{
162 { BFD_RELOC_NONE, R_FT32_NONE },
458653a9 163 { BFD_RELOC_32, R_FT32_32 },
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164 { BFD_RELOC_16, R_FT32_16 },
165 { BFD_RELOC_8, R_FT32_8 },
166 { BFD_RELOC_FT32_10, R_FT32_10 },
167 { BFD_RELOC_FT32_20, R_FT32_20 },
168 { BFD_RELOC_FT32_17, R_FT32_17 },
169 { BFD_RELOC_FT32_18, R_FT32_18 },
170};
171
172static reloc_howto_type *
173ft32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
174 bfd_reloc_code_real_type code)
175{
176 unsigned int i;
177
178 for (i = sizeof (ft32_reloc_map) / sizeof (ft32_reloc_map[0]);
179 --i;)
180 if (ft32_reloc_map [i].bfd_reloc_val == code)
181 return & ft32_elf_howto_table [ft32_reloc_map[i].ft32_reloc_val];
182
183 return NULL;
184}
185
186static reloc_howto_type *
187ft32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
188{
189 unsigned int i;
190
191 for (i = 0;
192 i < sizeof (ft32_elf_howto_table) / sizeof (ft32_elf_howto_table[0]);
193 i++)
194 if (ft32_elf_howto_table[i].name != NULL
195 && strcasecmp (ft32_elf_howto_table[i].name, r_name) == 0)
196 return &ft32_elf_howto_table[i];
197
198 return NULL;
199}
200
201/* Set the howto pointer for an FT32 ELF reloc. */
202
203static void
204ft32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
205 arelent *cache_ptr,
206 Elf_Internal_Rela *dst)
207{
208 unsigned int r_type;
209
210 r_type = ELF32_R_TYPE (dst->r_info);
211 BFD_ASSERT (r_type < (unsigned int) R_FT32_max);
212 cache_ptr->howto = & ft32_elf_howto_table [r_type];
213}
214\f
215/* Relocate an FT32 ELF section.
216
217 The RELOCATE_SECTION function is called by the new ELF backend linker
218 to handle the relocations for a section.
219
220 The relocs are always passed as Rela structures; if the section
221 actually uses Rel structures, the r_addend field will always be
222 zero.
223
224 This function is responsible for adjusting the section contents as
225 necessary, and (if using Rela relocs and generating a relocatable
226 output file) adjusting the reloc addend as necessary.
227
228 This function does not have to worry about setting the reloc
229 address or the reloc symbol index.
230
231 LOCAL_SYMS is a pointer to the swapped in local symbols.
232
233 LOCAL_SECTIONS is an array giving the section in the input file
234 corresponding to the st_shndx field of each local symbol.
235
236 The global hash table entry for the global symbols can be found
237 via elf_sym_hashes (input_bfd).
238
239 When generating relocatable output, this function must handle
240 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
241 going to be the section symbol corresponding to the output
242 section, which means that the addend must be adjusted
243 accordingly. */
244
245static bfd_boolean
246ft32_elf_relocate_section (bfd *output_bfd,
247 struct bfd_link_info *info,
248 bfd *input_bfd,
249 asection *input_section,
250 bfd_byte *contents,
251 Elf_Internal_Rela *relocs,
252 Elf_Internal_Sym *local_syms,
253 asection **local_sections)
254{
255 Elf_Internal_Shdr *symtab_hdr;
256 struct elf_link_hash_entry **sym_hashes;
257 Elf_Internal_Rela *rel;
258 Elf_Internal_Rela *relend;
259
260 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
261 sym_hashes = elf_sym_hashes (input_bfd);
262 relend = relocs + input_section->reloc_count;
263
264 for (rel = relocs; rel < relend; rel ++)
265 {
266 reloc_howto_type *howto;
267 unsigned long r_symndx;
268 Elf_Internal_Sym *sym;
269 asection *sec;
270 struct elf_link_hash_entry *h;
271 bfd_vma relocation;
272 bfd_reloc_status_type r;
273 const char *name;
274 int r_type;
275
276 r_type = ELF32_R_TYPE (rel->r_info);
277 r_symndx = ELF32_R_SYM (rel->r_info);
278 howto = ft32_elf_howto_table + r_type;
279 h = NULL;
280 sym = NULL;
281 sec = NULL;
282
283 if (r_symndx < symtab_hdr->sh_info)
284 {
285 sym = local_syms + r_symndx;
286 sec = local_sections [r_symndx];
287 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
288
289 name = bfd_elf_string_from_elf_section
290 (input_bfd, symtab_hdr->sh_link, sym->st_name);
291 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
292 }
293 else
294 {
295 bfd_boolean unresolved_reloc, warned, ignored;
296
297 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
298 r_symndx, symtab_hdr, sym_hashes,
299 h, sec, relocation,
300 unresolved_reloc, warned, ignored);
301
302 name = h->root.root.string;
303 }
304
305 if (sec != NULL && discarded_section (sec))
306 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
307 rel, 1, relend, howto, 0, contents);
308
0e1862bb 309 if (bfd_link_relocatable (info))
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310 continue;
311
312 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
313 contents, rel->r_offset,
314 relocation, rel->r_addend);
315
316 if (r != bfd_reloc_ok)
317 {
318 const char * msg = NULL;
319
320 switch (r)
321 {
322 case bfd_reloc_overflow:
1a72702b 323 (*info->callbacks->reloc_overflow)
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324 (info, (h ? &h->root : NULL), name, howto->name,
325 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
326 break;
327
328 case bfd_reloc_undefined:
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329 (*info->callbacks->undefined_symbol)
330 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
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331 break;
332
333 case bfd_reloc_outofrange:
334 msg = _("internal error: out of range error");
335 break;
336
337 case bfd_reloc_notsupported:
338 msg = _("internal error: unsupported relocation error");
339 break;
340
341 case bfd_reloc_dangerous:
342 msg = _("internal error: dangerous relocation");
343 break;
344
345 default:
346 msg = _("internal error: unknown error");
347 break;
348 }
349
350 if (msg)
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351 (*info->callbacks->warning) (info, msg, name, input_bfd,
352 input_section, rel->r_offset);
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353 }
354 }
355
356 return TRUE;
357}
358\f
359#define ELF_ARCH bfd_arch_ft32
360#define ELF_MACHINE_CODE EM_FT32
361#define ELF_MAXPAGESIZE 0x1
362
363#define TARGET_LITTLE_SYM ft32_elf32_vec
364#define TARGET_LITTLE_NAME "elf32-ft32"
365
366#define elf_info_to_howto_rel NULL
367#define elf_info_to_howto ft32_info_to_howto_rela
368#define elf_backend_relocate_section ft32_elf_relocate_section
369
370#define elf_backend_can_gc_sections 1
371#define elf_backend_rela_normal 1
372
373#define bfd_elf32_bfd_reloc_type_lookup ft32_reloc_type_lookup
374#define bfd_elf32_bfd_reloc_name_lookup ft32_reloc_name_lookup
375
376#include "elf32-target.h"
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