1 /* BFD back-end for TMS320C30 coff binaries.
2 Copyright (C) 1998-2023 Free Software Foundation, Inc.
3 Contributed by Steven Haworth (steve@pm.cse.rmit.edu.au)
4
5 This file is part of BFD, the Binary File Descriptor library.
6
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.
11
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.
16
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, MA
20 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "bfdlink.h"
26 #include "coff/tic30.h"
27 #include "coff/internal.h"
28 #include "libcoff.h"
29
30 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
31
32 reloc_howto_type tic30_coff_howto_table[] =
33 {
34 HOWTO (R_TIC30_ABS16, 2, 2, 16, false, 0, 0, NULL,
35 "16", false, 0x0000FFFF, 0x0000FFFF, false),
36 HOWTO (R_TIC30_ABS24, 2, 4, 24, false, 8, complain_overflow_bitfield, NULL,
37 "24", false, 0xFFFFFF00, 0xFFFFFF00, false),
38 HOWTO (R_TIC30_LDP, 18, 1, 24, false, 0, complain_overflow_bitfield, NULL,
39 "LDP", false, 0x00FF0000, 0x000000FF, false),
40 HOWTO (R_TIC30_ABS32, 2, 4, 32, false, 0, complain_overflow_bitfield, NULL,
41 "32", false, 0xFFFFFFFF, 0xFFFFFFFF, false),
42 HOWTO (R_TIC30_PC16, 2, 2, 16, true, 0, complain_overflow_signed, NULL,
43 "PCREL", false, 0x0000FFFF, 0x0000FFFF, false),
44 EMPTY_HOWTO (-1)
45 };
46
47 #ifndef coff_bfd_reloc_type_lookup
48 #define coff_bfd_reloc_type_lookup tic30_coff_reloc_type_lookup
49 #define coff_bfd_reloc_name_lookup tic30_coff_reloc_name_lookup
50
51 /* For the case statement use the code values used in tc_gen_reloc to
52 map to the howto table entries that match those in both the aout
53 and coff implementations. */
54
55 static reloc_howto_type *
56 tic30_coff_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
57 bfd_reloc_code_real_type code)
58 {
59 switch (code)
60 {
61 case BFD_RELOC_8:
62 case BFD_RELOC_TIC30_LDP:
63 return &tic30_coff_howto_table[2];
64 case BFD_RELOC_16:
65 return &tic30_coff_howto_table[0];
66 case BFD_RELOC_24:
67 return &tic30_coff_howto_table[1];
68 case BFD_RELOC_16_PCREL:
69 return &tic30_coff_howto_table[4];
70 case BFD_RELOC_32:
71 return &tic30_coff_howto_table[3];
72 default:
73 return (reloc_howto_type *) NULL;
74 }
75 }
76
77 static reloc_howto_type *
78 tic30_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
79 const char *r_name)
80 {
81 unsigned int i;
82
83 for (i = 0;
84 i < (sizeof (tic30_coff_howto_table)
85 / sizeof (tic30_coff_howto_table[0]));
86 i++)
87 if (tic30_coff_howto_table[i].name != NULL
88 && strcasecmp (tic30_coff_howto_table[i].name, r_name) == 0)
89 return &tic30_coff_howto_table[i];
90
91 return NULL;
92 }
93
94 #endif
95
96 /* Turn a howto into a reloc number. */
97
98 static int
99 coff_tic30_select_reloc (reloc_howto_type *howto)
100 {
101 return howto->type;
102 }
103
104 #define SELECT_RELOC(x,howto) x.r_type = coff_tic30_select_reloc(howto)
105
106 #define BADMAG(x) TIC30BADMAG(x)
107 #define TIC30 1 /* Customize coffcode.h */
108 #define __A_MAGIC_SET__
109
110 /* Code to swap in the reloc */
111 #define SWAP_IN_RELOC_OFFSET H_GET_32
112 #define SWAP_OUT_RELOC_OFFSET H_PUT_32
113 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) dst->r_stuff[0] = 'S'; \
114 dst->r_stuff[1] = 'C';
115
116 /* Code to turn a r_type into a howto ptr, uses the above howto table. */
117
118 static void
119 rtype2howto (arelent *internal, struct internal_reloc *dst)
120 {
121 switch (dst->r_type)
122 {
123 case R_TIC30_ABS16:
124 internal->howto = &tic30_coff_howto_table[0];
125 break;
126 case R_TIC30_ABS24:
127 internal->howto = &tic30_coff_howto_table[1];
128 break;
129 case R_TIC30_ABS32:
130 internal->howto = &tic30_coff_howto_table[3];
131 break;
132 case R_TIC30_LDP:
133 internal->howto = &tic30_coff_howto_table[2];
134 break;
135 case R_TIC30_PC16:
136 internal->howto = &tic30_coff_howto_table[4];
137 break;
138 default:
139 internal->howto = NULL;
140 break;
141 }
142 }
143
144 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
145
146 /* Perform any necessary magic to the addend in a reloc entry */
147
148 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
149 cache_ptr->addend = ext_reloc.r_offset;
150
151 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
152 reloc_processing(relent, reloc, symbols, abfd, section)
153
154 static void
155 reloc_processing (arelent *relent,
156 struct internal_reloc *reloc,
157 asymbol **symbols,
158 bfd *abfd,
159 asection *section)
160 {
161 relent->address = reloc->r_vaddr;
162 rtype2howto (relent, reloc);
163
164 if (reloc->r_symndx == -1 || symbols == NULL)
165 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
166 else if (reloc->r_symndx >= 0 && reloc->r_symndx < obj_conv_table_size (abfd))
167 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
168 else
169 {
170 _bfd_error_handler
171 /* xgettext:c-format */
172 (_("%pB: warning: illegal symbol index %ld in relocs"),
173 abfd, reloc->r_symndx);
174 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
175 }
176 relent->addend = reloc->r_offset;
177 relent->address -= section->vma;
178 }
179
180 #ifndef bfd_pe_print_pdata
181 #define bfd_pe_print_pdata NULL
182 #endif
183
184 #include "coffcode.h"
185
186 const bfd_target tic30_coff_vec =
187 {
188 "coff-tic30", /* name */
189 bfd_target_coff_flavour,
190 BFD_ENDIAN_BIG, /* data byte order is big */
191 BFD_ENDIAN_LITTLE, /* header byte order is little */
192
193 (HAS_RELOC | EXEC_P /* object flags */
194 | HAS_LINENO | HAS_DEBUG
195 | HAS_SYMS | HAS_LOCALS | WP_TEXT),
196
197 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
198 '_', /* leading symbol underscore */
199 '/', /* ar_pad_char */
200 15, /* ar_max_namelen */
201 0, /* match priority. */
202 TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */
203 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
204 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
205 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
206 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
207 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
208 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
209
210 { /* bfd_check_format */
211 _bfd_dummy_target,
212 coff_object_p,
213 bfd_generic_archive_p,
214 _bfd_dummy_target
215 },
216 { /* bfd_set_format */
217 _bfd_bool_bfd_false_error,
218 coff_mkobject,
219 _bfd_generic_mkarchive,
220 _bfd_bool_bfd_false_error
221 },
222 { /* bfd_write_contents */
223 _bfd_bool_bfd_false_error,
224 coff_write_object_contents,
225 _bfd_write_archive_contents,
226 _bfd_bool_bfd_false_error
227 },
228
229 BFD_JUMP_TABLE_GENERIC (coff),
230 BFD_JUMP_TABLE_COPY (coff),
231 BFD_JUMP_TABLE_CORE (_bfd_nocore),
232 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
233 BFD_JUMP_TABLE_SYMBOLS (coff),
234 BFD_JUMP_TABLE_RELOCS (coff),
235 BFD_JUMP_TABLE_WRITE (coff),
236 BFD_JUMP_TABLE_LINK (coff),
237 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
238
239 NULL,
240
241 COFF_SWAP_TABLE
242 };