1 /* BFD back-end for TMS320C4X coff binaries. 2 Copyright (C) 1996-2016 Free Software Foundation, Inc. 3 4 Contributed by Michael Hayes (m.hayes (at) 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 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 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 * 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 * 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 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 * 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 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
