1 /* BFD back-end for TMS320C4X coff binaries.
2 Copyright (C) 1996-2017 Free Software Foundation, Inc.
4 Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz)
6 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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
27 #include "coff/tic4x.h"
28 #include "coff/internal.h"
32 #define F_LSYMS F_LSYMS_TICOFF
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 *);
39 tic4x_reloc_processing (arelent *, struct internal_reloc *,
40 asymbol **, bfd *, asection *);
42 /* Replace the stock _bfd_coff_is_local_label_name to recognize TI COFF local
45 ticoff_bfd_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
48 if (TICOFF_LOCAL_LABEL_P(name))
53 #define coff_bfd_is_local_label_name ticoff_bfd_is_local_label_name
55 #define RELOC_PROCESSING(RELENT,RELOC,SYMS,ABFD,SECT)\
56 tic4x_reloc_processing (RELENT,RELOC,SYMS,ABFD,SECT)
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)
64 #undef coff_rtype_to_howto
65 #define coff_rtype_to_howto coff_tic4x_rtype_to_howto
67 #ifndef bfd_pe_print_pdata
68 #define bfd_pe_print_pdata NULL
73 static bfd_reloc_status_type
74 tic4x_relocation (bfd *abfd ATTRIBUTE_UNUSED,
76 asymbol *symbol ATTRIBUTE_UNUSED,
77 void * data ATTRIBUTE_UNUSED,
78 asection *input_section,
80 char **error_message ATTRIBUTE_UNUSED)
82 if (output_bfd != (bfd *) NULL)
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;
90 return bfd_reloc_continue;
93 reloc_howto_type tic4x_howto_table[] =
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),
110 #define HOWTO_SIZE (sizeof(tic4x_howto_table) / sizeof(tic4x_howto_table[0]))
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
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. */
120 static reloc_howto_type *
121 tic4x_coff_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
122 bfd_reloc_code_real_type code)
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;
140 for (i = 0; i < HOWTO_SIZE; i++)
142 if (tic4x_howto_table[i].type == type)
143 return tic4x_howto_table + i;
148 static reloc_howto_type *
149 tic4x_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
155 i < sizeof (tic4x_howto_table) / sizeof (tic4x_howto_table[0]);
157 if (tic4x_howto_table[i].name != NULL
158 && strcasecmp (tic4x_howto_table[i].name, r_name) == 0)
159 return &tic4x_howto_table[i];
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
168 tic4x_lookup_howto (arelent *internal,
169 struct internal_reloc *dst)
172 int bank = (dst->r_symndx == -1) ? HOWTO_BANK : 0;
174 for (i = 0; i < HOWTO_SIZE; i++)
176 if (tic4x_howto_table[i].type == dst->r_type)
178 internal->howto = tic4x_howto_table + i + bank;
183 _bfd_error_handler (_("Unrecognized reloc type 0x%x"),
184 (unsigned int) dst->r_type);
188 static reloc_howto_type *
189 coff_tic4x_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
191 struct internal_reloc *rel,
192 struct coff_link_hash_entry *h ATTRIBUTE_UNUSED,
193 struct internal_syment *sym ATTRIBUTE_UNUSED,
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;
204 tic4x_lookup_howto (&genrel, rel);
211 tic4x_reloc_processing (arelent *relent,
212 struct internal_reloc *reloc,
219 relent->address = reloc->r_vaddr;
221 if (reloc->r_symndx != -1)
223 if (reloc->r_symndx < 0 || reloc->r_symndx >= obj_conv_table_size (abfd))
226 /* xgettext: c-format */
227 (_("%B: warning: illegal symbol index %ld in relocs"),
228 abfd, reloc->r_symndx);
229 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
234 relent->sym_ptr_ptr = (symbols
235 + obj_convert (abfd)[reloc->r_symndx]);
236 ptr = *(relent->sym_ptr_ptr);
241 relent->sym_ptr_ptr = section->symbol_ptr_ptr;
242 ptr = *(relent->sym_ptr_ptr);
245 /* The symbols definitions that we have read in have been relocated
246 as if their sections started at 0. But the offsets refering to
247 the symbols in the raw data have not been modified, so we have to
248 have a negative addend to compensate.
250 Note that symbols which used to be common must be left alone. */
252 /* Calculate any reloc addend by looking at the symbol. */
253 CALC_ADDEND (abfd, ptr, *reloc, relent);
255 relent->address -= section->vma;
256 /* !! relent->section = (asection *) NULL; */
258 /* Fill in the relent->howto field from reloc->r_type. */
259 tic4x_lookup_howto (relent, reloc);
263 /* TI COFF v0, DOS tools (little-endian headers). */
264 CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff0_vec, "coff0-tic4x",
265 0, SEC_CODE | SEC_READONLY, '_',
266 NULL, &ticoff0_swap_table);
268 /* TI COFF v0, SPARC tools (big-endian headers). */
269 CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff0_beh_vec, "coff0-beh-tic4x",
270 0, SEC_CODE | SEC_READONLY, '_',
271 &tic4x_coff0_vec, &ticoff0_swap_table);
273 /* TI COFF v1, DOS tools (little-endian headers). */
274 CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff1_vec, "coff1-tic4x",
275 0, SEC_CODE | SEC_READONLY, '_',
276 &tic4x_coff0_beh_vec, &ticoff1_swap_table);
278 /* TI COFF v1, SPARC tools (big-endian headers). */
279 CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff1_beh_vec, "coff1-beh-tic4x",
280 0, SEC_CODE | SEC_READONLY, '_',
281 &tic4x_coff1_vec, &ticoff1_swap_table);
283 /* TI COFF v2, TI DOS tools output (little-endian headers). */
284 CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff2_vec, "coff2-tic4x",
285 0, SEC_CODE | SEC_READONLY, '_',
286 &tic4x_coff1_beh_vec, COFF_SWAP_TABLE);
288 /* TI COFF v2, TI SPARC tools output (big-endian headers). */
289 CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff2_beh_vec, "coff2-beh-tic4x",
290 0, SEC_CODE | SEC_READONLY, '_',
291 &tic4x_coff2_vec, COFF_SWAP_TABLE);