1 /* BFD back-end for TMS320C4X coff binaries.
2 Copyright (C) 1996-2014 Free Software Foundation, Inc.
3
4 Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz)
5
6 This file is part of BFD, the Binary File Descriptor library.
7
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.
12
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.
17
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, MA
21 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "libbfd.h"
26 #include "bfdlink.h"
27 #include "coff/tic4x.h"
28 #include "coff/internal.h"
29 #include "libcoff.h"
30
31 #undef F_LSYMS
32 #define F_LSYMS F_LSYMS_TICOFF
33
34 static reloc_howto_type *
35 coff_tic4x_rtype_to_howto (bfd *, asection *, struct internal_reloc *,
36 struct coff_link_hash_entry *,
37 struct internal_syment *, bfd_vma *);
38 static void
39 tic4x_reloc_processing (arelent *, struct internal_reloc *,
40 asymbol **, bfd *, asection *);
41
42 /* Replace the stock _bfd_coff_is_local_label_name to recognize TI COFF local
43 labels. */
44 static bfd_boolean
ticoff_bfd_is_local_label_name(bfd * abfd ATTRIBUTE_UNUSED,const char * name)45 ticoff_bfd_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
46 const char *name)
47 {
48 if (TICOFF_LOCAL_LABEL_P(name))
49 return TRUE;
50 return FALSE;
51 }
52
53 #define coff_bfd_is_local_label_name ticoff_bfd_is_local_label_name
54
55 #define RELOC_PROCESSING(RELENT,RELOC,SYMS,ABFD,SECT)\
56 tic4x_reloc_processing (RELENT,RELOC,SYMS,ABFD,SECT)
57
58 /* Customize coffcode.h; the default coff_ functions are set up to use
59 COFF2; coff_bad_format_hook uses BADMAG, so set that for COFF2.
60 The COFF1 and COFF0 vectors use custom _bad_format_hook procs
61 instead of setting BADMAG. */
62 #define BADMAG(x) COFF2_BADMAG(x)
63
64 #undef coff_rtype_to_howto
65 #define coff_rtype_to_howto coff_tic4x_rtype_to_howto
66
67 #ifndef bfd_pe_print_pdata
68 #define bfd_pe_print_pdata NULL
69 #endif
70
71 #include "coffcode.h"
72
73 static bfd_reloc_status_type
tic4x_relocation(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol ATTRIBUTE_UNUSED,void * data ATTRIBUTE_UNUSED,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)74 tic4x_relocation (bfd *abfd ATTRIBUTE_UNUSED,
75 arelent *reloc_entry,
76 asymbol *symbol ATTRIBUTE_UNUSED,
77 void * data ATTRIBUTE_UNUSED,
78 asection *input_section,
79 bfd *output_bfd,
80 char **error_message ATTRIBUTE_UNUSED)
81 {
82 if (output_bfd != (bfd *) NULL)
83 {
84 /* This is a partial relocation, and we want to apply the
85 relocation to the reloc entry rather than the raw data.
86 Modify the reloc inplace to reflect what we now know. */
87 reloc_entry->address += input_section->output_offset;
88 return bfd_reloc_ok;
89 }
90 return bfd_reloc_continue;
91 }
92
93 reloc_howto_type tic4x_howto_table[] =
94 {
95 HOWTO(R_RELWORD, 0, 2, 16, FALSE, 0, complain_overflow_signed, tic4x_relocation, "RELWORD", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
96 HOWTO(R_REL24, 0, 2, 24, FALSE, 0, complain_overflow_bitfield, tic4x_relocation, "REL24", TRUE, 0x00ffffff, 0x00ffffff, FALSE),
97 HOWTO(R_RELLONG, 0, 2, 32, FALSE, 0, complain_overflow_dont, tic4x_relocation, "RELLONG", TRUE, 0xffffffff, 0xffffffff, FALSE),
98 HOWTO(R_PCRWORD, 0, 2, 16, TRUE, 0, complain_overflow_signed, tic4x_relocation, "PCRWORD", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
99 HOWTO(R_PCR24, 0, 2, 24, TRUE, 0, complain_overflow_signed, tic4x_relocation, "PCR24", TRUE, 0x00ffffff, 0x00ffffff, FALSE),
100 HOWTO(R_PARTLS16, 0, 2, 16, FALSE, 0, complain_overflow_dont, tic4x_relocation, "PARTLS16", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
101 HOWTO(R_PARTMS8, 16, 2, 16, FALSE, 0, complain_overflow_dont, tic4x_relocation, "PARTMS8", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
102 HOWTO(R_RELWORD, 0, 2, 16, FALSE, 0, complain_overflow_signed, tic4x_relocation, "ARELWORD", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
103 HOWTO(R_REL24, 0, 2, 24, FALSE, 0, complain_overflow_signed, tic4x_relocation, "AREL24", TRUE, 0x00ffffff, 0x00ffffff, FALSE),
104 HOWTO(R_RELLONG, 0, 2, 32, FALSE, 0, complain_overflow_signed, tic4x_relocation, "ARELLONG", TRUE, 0xffffffff, 0xffffffff, FALSE),
105 HOWTO(R_PCRWORD, 0, 2, 16, TRUE, 0, complain_overflow_signed, tic4x_relocation, "APCRWORD", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
106 HOWTO(R_PCR24, 0, 2, 24, TRUE, 0, complain_overflow_signed, tic4x_relocation, "APCR24", TRUE, 0x00ffffff, 0x00ffffff, FALSE),
107 HOWTO(R_PARTLS16, 0, 2, 16, FALSE, 0, complain_overflow_dont, tic4x_relocation, "APARTLS16", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
108 HOWTO(R_PARTMS8, 16, 2, 16, FALSE, 0, complain_overflow_dont, tic4x_relocation, "APARTMS8", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
109 };
110 #define HOWTO_SIZE (sizeof(tic4x_howto_table) / sizeof(tic4x_howto_table[0]))
111
112 #undef coff_bfd_reloc_type_lookup
113 #define coff_bfd_reloc_type_lookup tic4x_coff_reloc_type_lookup
114 #undef coff_bfd_reloc_name_lookup
115 #define coff_bfd_reloc_name_lookup tic4x_coff_reloc_name_lookup
116
117 /* For the case statement use the code values used tc_gen_reloc (defined in
118 bfd/reloc.c) to map to the howto table entries. */
119
120 static reloc_howto_type *
tic4x_coff_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)121 tic4x_coff_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
122 bfd_reloc_code_real_type code)
123 {
124 unsigned int type;
125 unsigned int i;
126
127 switch (code)
128 {
129 case BFD_RELOC_32: type = R_RELLONG; break;
130 case BFD_RELOC_24: type = R_REL24; break;
131 case BFD_RELOC_16: type = R_RELWORD; break;
132 case BFD_RELOC_24_PCREL: type = R_PCR24; break;
133 case BFD_RELOC_16_PCREL: type = R_PCRWORD; break;
134 case BFD_RELOC_HI16: type = R_PARTMS8; break;
135 case BFD_RELOC_LO16: type = R_PARTLS16; break;
136 default:
137 return NULL;
138 }
139
140 for (i = 0; i < HOWTO_SIZE; i++)
141 {
142 if (tic4x_howto_table[i].type == type)
143 return tic4x_howto_table + i;
144 }
145 return NULL;
146 }
147
148 static reloc_howto_type *
tic4x_coff_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)149 tic4x_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
150 const char *r_name)
151 {
152 unsigned int i;
153
154 for (i = 0;
155 i < sizeof (tic4x_howto_table) / sizeof (tic4x_howto_table[0]);
156 i++)
157 if (tic4x_howto_table[i].name != NULL
158 && strcasecmp (tic4x_howto_table[i].name, r_name) == 0)
159 return &tic4x_howto_table[i];
160
161 return NULL;
162 }
163
164 /* Code to turn a r_type into a howto ptr, uses the above howto table.
165 Called after some initial checking by the tic4x_rtype_to_howto fn
166 below. */
167 static void
tic4x_lookup_howto(arelent * internal,struct internal_reloc * dst)168 tic4x_lookup_howto (arelent *internal,
169 struct internal_reloc *dst)
170 {
171 unsigned int i;
172 int bank = (dst->r_symndx == -1) ? HOWTO_BANK : 0;
173
174 for (i = 0; i < HOWTO_SIZE; i++)
175 {
176 if (tic4x_howto_table[i].type == dst->r_type)
177 {
178 internal->howto = tic4x_howto_table + i + bank;
179 return;
180 }
181 }
182
183 (*_bfd_error_handler) (_("Unrecognized reloc type 0x%x"),
184 (unsigned int) dst->r_type);
185 abort();
186 }
187
188 static reloc_howto_type *
coff_tic4x_rtype_to_howto(bfd * abfd ATTRIBUTE_UNUSED,asection * sec,struct internal_reloc * rel,struct coff_link_hash_entry * h ATTRIBUTE_UNUSED,struct internal_syment * sym ATTRIBUTE_UNUSED,bfd_vma * addendp)189 coff_tic4x_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
190 asection *sec,
191 struct internal_reloc *rel,
192 struct coff_link_hash_entry *h ATTRIBUTE_UNUSED,
193 struct internal_syment *sym ATTRIBUTE_UNUSED,
194 bfd_vma *addendp)
195 {
196 arelent genrel;
197
198 if (rel->r_symndx == -1 && addendp != NULL)
199 /* This is a TI "internal relocation", which means that the relocation
200 amount is the amount by which the current section is being relocated
201 in the output section. */
202 *addendp = (sec->output_section->vma + sec->output_offset) - sec->vma;
203
204 tic4x_lookup_howto (&genrel, rel);
205
206 return genrel.howto;
207 }
208
209
210 static void
tic4x_reloc_processing(arelent * relent,struct internal_reloc * reloc,asymbol ** symbols,bfd * abfd,asection * section)211 tic4x_reloc_processing (arelent *relent,
212 struct internal_reloc *reloc,
213 asymbol **symbols,
214 bfd *abfd,
215 asection *section)
216 {
217 asymbol *ptr;
218
219 relent->address = reloc->r_vaddr;
220
221 if (reloc->r_symndx != -1)
222 {
223 if (reloc->r_symndx < 0 || reloc->r_symndx >= obj_conv_table_size (abfd))
224 {
225 (*_bfd_error_handler)
226 (_("%s: warning: illegal symbol index %ld in relocs"),
227 bfd_get_filename (abfd), reloc->r_symndx);
228 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
229 ptr = NULL;
230 }
231 else
232 {
233 relent->sym_ptr_ptr = (symbols
234 + obj_convert (abfd)[reloc->r_symndx]);
235 ptr = *(relent->sym_ptr_ptr);
236 }
237 }
238 else
239 {
240 relent->sym_ptr_ptr = section->symbol_ptr_ptr;
241 ptr = *(relent->sym_ptr_ptr);
242 }
243
244 /* The symbols definitions that we have read in have been relocated
245 as if their sections started at 0. But the offsets refering to
246 the symbols in the raw data have not been modified, so we have to
247 have a negative addend to compensate.
248
249 Note that symbols which used to be common must be left alone. */
250
251 /* Calculate any reloc addend by looking at the symbol. */
252 CALC_ADDEND (abfd, ptr, *reloc, relent);
253
254 relent->address -= section->vma;
255 /* !! relent->section = (asection *) NULL; */
256
257 /* Fill in the relent->howto field from reloc->r_type. */
258 tic4x_lookup_howto (relent, reloc);
259 }
260
261
262 /* TI COFF v0, DOS tools (little-endian headers). */
263 CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff0_vec, "coff0-tic4x",
264 0, SEC_CODE | SEC_READONLY, '_',
265 NULL, &ticoff0_swap_table);
266
267 /* TI COFF v0, SPARC tools (big-endian headers). */
268 CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff0_beh_vec, "coff0-beh-tic4x",
269 0, SEC_CODE | SEC_READONLY, '_',
270 &tic4x_coff0_vec, &ticoff0_swap_table);
271
272 /* TI COFF v1, DOS tools (little-endian headers). */
273 CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff1_vec, "coff1-tic4x",
274 0, SEC_CODE | SEC_READONLY, '_',
275 &tic4x_coff0_beh_vec, &ticoff1_swap_table);
276
277 /* TI COFF v1, SPARC tools (big-endian headers). */
278 CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff1_beh_vec, "coff1-beh-tic4x",
279 0, SEC_CODE | SEC_READONLY, '_',
280 &tic4x_coff1_vec, &ticoff1_swap_table);
281
282 /* TI COFF v2, TI DOS tools output (little-endian headers). */
283 CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff2_vec, "coff2-tic4x",
284 0, SEC_CODE | SEC_READONLY, '_',
285 &tic4x_coff1_beh_vec, COFF_SWAP_TABLE);
286
287 /* TI COFF v2, TI SPARC tools output (big-endian headers). */
288 CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff2_beh_vec, "coff2-beh-tic4x",
289 0, SEC_CODE | SEC_READONLY, '_',
290 &tic4x_coff2_vec, COFF_SWAP_TABLE);
291