1 /* Infineon XC16X-specific support for 16-bit ELF.
2 Copyright (C) 2006-2017 Free Software Foundation, Inc.
3 Contributed by KPIT Cummins Infosystems
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, 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "elf/xc16x.h"
28 #include "libiberty.h"
30 static reloc_howto_type xc16x_elf_howto_table [] =
32 /* This reloc does nothing. */
33 HOWTO (R_XC16X_NONE, /* type */
35 3, /* size (0 = byte, 1 = short, 2 = long) */
37 FALSE, /* pc_relative */
39 complain_overflow_dont, /* complain_on_overflow */
40 bfd_elf_generic_reloc, /* special_function */
41 "R_XC16X_NONE", /* name */
42 FALSE, /* partial_inplace */
45 FALSE), /* pcrel_offset */
47 /* An 8 bit absolute relocation. */
48 HOWTO (R_XC16X_ABS_8, /* type */
50 0, /* size (0 = byte, 1 = short, 2 = long) */
52 FALSE, /* pc_relative */
54 complain_overflow_bitfield, /* complain_on_overflow */
55 bfd_elf_generic_reloc, /* special_function */
56 "R_XC16X_ABS_8", /* name */
57 TRUE, /* partial_inplace */
58 0x0000, /* src_mask */
59 0x00ff, /* dst_mask */
60 FALSE), /* pcrel_offset */
62 /* A 16 bit absolute relocation. */
63 HOWTO (R_XC16X_ABS_16, /* type */
65 1, /* size (0 = byte, 1 = short, 2 = long) */
67 FALSE, /* pc_relative */
69 complain_overflow_dont, /* complain_on_overflow */
70 bfd_elf_generic_reloc, /* special_function */
71 "R_XC16X_ABS_16", /* name */
72 TRUE, /* partial_inplace */
73 0x00000000, /* src_mask */
74 0x0000ffff, /* dst_mask */
75 FALSE), /* pcrel_offset */
77 HOWTO (R_XC16X_ABS_32, /* type */
79 2, /* size (0 = byte, 1 = short, 2 = long) */
81 FALSE, /* pc_relative */
83 complain_overflow_bitfield, /* complain_on_overflow */
84 bfd_elf_generic_reloc, /* special_function */
85 "R_XC16X_ABS_32", /* name */
86 TRUE, /* partial_inplace */
87 0x00000000, /* src_mask */
88 0xffffffff, /* dst_mask */
89 FALSE), /* pcrel_offset */
92 /* A PC relative 8 bit relocation. */
93 HOWTO (R_XC16X_8_PCREL, /* type */
95 0, /* size (0 = byte, 1 = short, 2 = long) */
97 TRUE, /* pc_relative */
99 complain_overflow_signed, /* complain_on_overflow */
100 bfd_elf_generic_reloc, /* special_function */
101 "R_XC16X_8_PCREL", /* name */
102 FALSE, /* partial_inplace */
103 0x0000, /* src_mask */
104 0x00ff, /* dst_mask */
105 TRUE), /* pcrel_offset */
107 /* Relocation regarding page number. */
108 HOWTO (R_XC16X_PAG, /* type */
110 1, /* size (0 = byte, 1 = short, 2 = long) */
112 FALSE, /* pc_relative */
114 complain_overflow_signed, /* complain_on_overflow */
115 bfd_elf_generic_reloc, /* special_function */
116 "R_XC16X_PAG", /* name */
117 TRUE, /* partial_inplace */
118 0x00000000, /* src_mask */
119 0x0000ffff, /* dst_mask */
120 FALSE), /* pcrel_offset */
123 /* Relocation regarding page number. */
124 HOWTO (R_XC16X_POF, /* type */
126 1, /* size (0 = byte, 1 = short, 2 = long) */
128 FALSE, /* pc_relative */
130 complain_overflow_signed, /* complain_on_overflow */
131 bfd_elf_generic_reloc, /* special_function */
132 "R_XC16X_POF", /* name */
133 TRUE, /* partial_inplace */
134 0x00000000, /* src_mask */
135 0x0000ffff, /* dst_mask */
136 FALSE), /* pcrel_offset */
139 /* Relocation regarding segment number. */
140 HOWTO (R_XC16X_SEG, /* type */
142 1, /* size (0 = byte, 1 = short, 2 = long) */
144 FALSE, /* pc_relative */
146 complain_overflow_signed, /* complain_on_overflow */
147 bfd_elf_generic_reloc, /* special_function */
148 "R_XC16X_SEG", /* name */
149 TRUE, /* partial_inplace */
150 0x00000000, /* src_mask */
151 0x0000ffff, /* dst_mask */
152 FALSE), /* pcrel_offset */
154 /* Relocation regarding segment offset. */
155 HOWTO (R_XC16X_SOF, /* type */
157 1, /* size (0 = byte, 1 = short, 2 = long) */
159 FALSE, /* pc_relative */
161 complain_overflow_signed, /* complain_on_overflow */
162 bfd_elf_generic_reloc, /* special_function */
163 "R_XC16X_SOF", /* name */
164 TRUE, /* partial_inplace */
165 0x00000000, /* src_mask */
166 0x0000ffff, /* dst_mask */
167 FALSE) /* pcrel_offset */
171 /* Map BFD reloc types to XC16X ELF reloc types. */
173 struct xc16x_reloc_map
175 bfd_reloc_code_real_type bfd_reloc_val;
176 unsigned int xc16x_reloc_val;
179 static const struct xc16x_reloc_map xc16x_reloc_map [] =
181 { BFD_RELOC_NONE, R_XC16X_NONE },
182 { BFD_RELOC_8, R_XC16X_ABS_8 },
183 { BFD_RELOC_16, R_XC16X_ABS_16 },
184 { BFD_RELOC_32, R_XC16X_ABS_32 },
185 { BFD_RELOC_8_PCREL, R_XC16X_8_PCREL },
186 { BFD_RELOC_XC16X_PAG, R_XC16X_PAG},
187 { BFD_RELOC_XC16X_POF, R_XC16X_POF},
188 { BFD_RELOC_XC16X_SEG, R_XC16X_SEG},
189 { BFD_RELOC_XC16X_SOF, R_XC16X_SOF},
193 /* This function is used to search for correct relocation type from
196 static reloc_howto_type *
197 xc16x_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
198 bfd_reloc_code_real_type code)
202 for (i = ARRAY_SIZE (xc16x_reloc_map); --i;)
203 if (xc16x_reloc_map [i].bfd_reloc_val == code)
204 return & xc16x_elf_howto_table [xc16x_reloc_map[i].xc16x_reloc_val];
209 static reloc_howto_type *
210 xc16x_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
216 i < sizeof (xc16x_elf_howto_table) / sizeof (xc16x_elf_howto_table[0]);
218 if (xc16x_elf_howto_table[i].name != NULL
219 && strcasecmp (xc16x_elf_howto_table[i].name, r_name) == 0)
220 return &xc16x_elf_howto_table[i];
225 /* For a particular operand this function is
226 called to finalise the type of relocation. */
229 elf32_xc16x_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
230 Elf_Internal_Rela *elf_reloc)
235 r = ELF32_R_TYPE (elf_reloc->r_info);
236 for (i = 0; i < ARRAY_SIZE (xc16x_elf_howto_table); i++)
237 if (xc16x_elf_howto_table[i].type == r)
239 bfd_reloc->howto = &xc16x_elf_howto_table[i];
245 static bfd_reloc_status_type
246 elf32_xc16x_final_link_relocate (unsigned long r_type,
248 bfd *output_bfd ATTRIBUTE_UNUSED,
249 asection *input_section ATTRIBUTE_UNUSED,
254 struct bfd_link_info *info ATTRIBUTE_UNUSED,
255 asection *sym_sec ATTRIBUTE_UNUSED,
256 int is_local ATTRIBUTE_UNUSED)
258 bfd_byte *hit_data = contents + offset;
268 bfd_put_16 (input_bfd, value, hit_data);
271 case R_XC16X_8_PCREL:
272 bfd_put_8 (input_bfd, value, hit_data);
275 /* Following case is to find page number from actual
276 address for this divide value by 16k i.e. page size. */
281 bfd_put_16 (input_bfd, value, hit_data);
284 /* Following case is to find page offset from actual address
285 for this take modulo of value by 16k i.e. page size. */
290 bfd_put_16 (input_bfd, value, hit_data);
293 /* Following case is to find segment number from actual
294 address for this divide value by 64k i.e. segment size. */
299 bfd_put_16 (input_bfd, value, hit_data);
302 /* Following case is to find segment offset from actual address
303 for this take modulo of value by 64k i.e. segment size. */
308 bfd_put_16 (input_bfd, value, hit_data);
312 if (!strstr (input_section->name,".debug"))
320 bfd_put_32 (input_bfd, value, hit_data);
325 bfd_put_32 (input_bfd, value, hit_data);
330 return bfd_reloc_notsupported;
335 elf32_xc16x_relocate_section (bfd *output_bfd,
336 struct bfd_link_info *info,
338 asection *input_section,
340 Elf_Internal_Rela *relocs,
341 Elf_Internal_Sym *local_syms,
342 asection **local_sections)
344 Elf_Internal_Shdr *symtab_hdr;
345 struct elf_link_hash_entry **sym_hashes;
346 Elf_Internal_Rela *rel, *relend;
348 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
349 sym_hashes = elf_sym_hashes (input_bfd);
352 relend = relocs + input_section->reloc_count;
353 for (; rel < relend; rel++)
356 unsigned long r_symndx;
357 Elf_Internal_Sym *sym;
359 struct elf_link_hash_entry *h;
362 /* This is a final link. */
363 r_symndx = ELF32_R_SYM (rel->r_info);
364 r_type = ELF32_R_TYPE (rel->r_info);
368 if (r_symndx < symtab_hdr->sh_info)
370 sym = local_syms + r_symndx;
371 sec = local_sections[r_symndx];
372 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
376 bfd_boolean unresolved_reloc, warned, ignored;
378 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
379 r_symndx, symtab_hdr, sym_hashes,
381 unresolved_reloc, warned, ignored);
384 if (sec != NULL && discarded_section (sec))
386 /* For relocs against symbols from removed linkonce sections,
387 or sections discarded by a linker script, we just want the
388 section contents cleared. Avoid any special processing. */
389 reloc_howto_type *howto;
390 howto = xc16x_reloc_type_lookup (input_bfd, r_type);
391 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
392 rel, 1, relend, howto, 0, contents);
395 if (bfd_link_relocatable (info))
398 elf32_xc16x_final_link_relocate (r_type, input_bfd, output_bfd,
400 contents, rel->r_offset,
401 relocation, rel->r_addend,
402 info, sec, h == NULL);
410 elf32_xc16x_final_write_processing (bfd *abfd,
411 bfd_boolean linker ATTRIBUTE_UNUSED)
415 switch (bfd_get_mach (abfd))
422 case bfd_mach_xc16xl:
426 case bfd_mach_xc16xs:
431 elf_elfheader (abfd)->e_flags |= val;
435 elf32_xc16x_mach (flagword flags)
441 return bfd_mach_xc16x;
444 return bfd_mach_xc16xl;
447 return bfd_mach_xc16xs;
453 elf32_xc16x_object_p (bfd *abfd)
455 bfd_default_set_arch_mach (abfd, bfd_arch_xc16x,
456 elf32_xc16x_mach (elf_elfheader (abfd)->e_flags));
461 #define ELF_ARCH bfd_arch_xc16x
462 #define ELF_MACHINE_CODE EM_XC16X
463 #define ELF_MAXPAGESIZE 0x100
465 #define TARGET_LITTLE_SYM xc16x_elf32_vec
466 #define TARGET_LITTLE_NAME "elf32-xc16x"
467 #define elf_backend_final_write_processing elf32_xc16x_final_write_processing
468 #define elf_backend_object_p elf32_xc16x_object_p
469 #define elf_backend_can_gc_sections 1
470 #define bfd_elf32_bfd_reloc_type_lookup xc16x_reloc_type_lookup
471 #define bfd_elf32_bfd_reloc_name_lookup xc16x_reloc_name_lookup
472 #define elf_info_to_howto elf32_xc16x_info_to_howto
473 #define elf_info_to_howto_rel elf32_xc16x_info_to_howto
474 #define elf_backend_relocate_section elf32_xc16x_relocate_section
475 #define elf_backend_rela_normal 1
477 #include "elf32-target.h"