1/* BFD back-end for TMS320C4X coff binaries. 2 Copyright 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2005, 2007 3 Free Software Foundation, Inc. 4 5 Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz) 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 22 02110-1301, USA. */ 23 24#include "sysdep.h" 25#include "bfd.h" 26#include "libbfd.h" 27#include "bfdlink.h" 28#include "coff/tic4x.h" 29#include "coff/internal.h" 30#include "libcoff.h" 31 32#undef F_LSYMS 33#define F_LSYMS F_LSYMS_TICOFF 34 35static bfd_boolean ticoff_bfd_is_local_label_name 36 PARAMS ((bfd *, const char *)); 37static bfd_reloc_status_type tic4x_relocation 38 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char ** )); 39static reloc_howto_type *tic4x_coff_reloc_type_lookup 40 PARAMS ((bfd *, bfd_reloc_code_real_type )); 41static void tic4x_lookup_howto 42 PARAMS ((arelent *, struct internal_reloc * )); 43static reloc_howto_type *coff_tic4x_rtype_to_howto 44 PARAMS ((bfd *, asection *, struct internal_reloc *, struct coff_link_hash_entry *, struct internal_syment *, bfd_vma * )); 45static void tic4x_reloc_processing 46 PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection * )); 47 48 49/* Replace the stock _bfd_coff_is_local_label_name to recognize TI COFF local 50 labels. */ 51static bfd_boolean 52ticoff_bfd_is_local_label_name (abfd, name) 53 bfd *abfd ATTRIBUTE_UNUSED; 54 const char *name; 55{ 56 if (TICOFF_LOCAL_LABEL_P(name)) 57 return TRUE; 58 return FALSE; 59} 60 61#define coff_bfd_is_local_label_name ticoff_bfd_is_local_label_name 62 63#define RELOC_PROCESSING(RELENT,RELOC,SYMS,ABFD,SECT)\ 64 tic4x_reloc_processing (RELENT,RELOC,SYMS,ABFD,SECT) 65 66/* Customize coffcode.h; the default coff_ functions are set up to use 67 COFF2; coff_bad_format_hook uses BADMAG, so set that for COFF2. 68 The COFF1 and COFF0 vectors use custom _bad_format_hook procs 69 instead of setting BADMAG. */ 70#define BADMAG(x) COFF2_BADMAG(x) 71 72#undef coff_rtype_to_howto 73#define coff_rtype_to_howto coff_tic4x_rtype_to_howto 74 75#include "coffcode.h" 76 77static bfd_reloc_status_type 78tic4x_relocation (abfd, reloc_entry, symbol, data, input_section, 79 output_bfd, error_message) 80 bfd *abfd ATTRIBUTE_UNUSED; 81 arelent *reloc_entry; 82 asymbol *symbol ATTRIBUTE_UNUSED; 83 PTR data ATTRIBUTE_UNUSED; 84 asection *input_section; 85 bfd *output_bfd; 86 char **error_message ATTRIBUTE_UNUSED; 87{ 88 if (output_bfd != (bfd *) NULL) 89 { 90 /* This is a partial relocation, and we want to apply the 91 relocation to the reloc entry rather than the raw data. 92 Modify the reloc inplace to reflect what we now know. */ 93 reloc_entry->address += input_section->output_offset; 94 return bfd_reloc_ok; 95 } 96 return bfd_reloc_continue; 97} 98 99reloc_howto_type tic4x_howto_table[] = 100{ 101 HOWTO(R_RELWORD, 0, 2, 16, FALSE, 0, complain_overflow_signed, tic4x_relocation, "RELWORD", TRUE, 0x0000ffff, 0x0000ffff, FALSE), 102 HOWTO(R_REL24, 0, 2, 24, FALSE, 0, complain_overflow_bitfield, tic4x_relocation, "REL24", TRUE, 0x00ffffff, 0x00ffffff, FALSE), 103 HOWTO(R_RELLONG, 0, 2, 32, FALSE, 0, complain_overflow_dont, tic4x_relocation, "RELLONG", TRUE, 0xffffffff, 0xffffffff, FALSE), 104 HOWTO(R_PCRWORD, 0, 2, 16, TRUE, 0, complain_overflow_signed, tic4x_relocation, "PCRWORD", TRUE, 0x0000ffff, 0x0000ffff, FALSE), 105 HOWTO(R_PCR24, 0, 2, 24, TRUE, 0, complain_overflow_signed, tic4x_relocation, "PCR24", TRUE, 0x00ffffff, 0x00ffffff, FALSE), 106 HOWTO(R_PARTLS16, 0, 2, 16, FALSE, 0, complain_overflow_dont, tic4x_relocation, "PARTLS16", TRUE, 0x0000ffff, 0x0000ffff, FALSE), 107 HOWTO(R_PARTMS8, 16, 2, 16, FALSE, 0, complain_overflow_dont, tic4x_relocation, "PARTMS8", TRUE, 0x0000ffff, 0x0000ffff, FALSE), 108 HOWTO(R_RELWORD, 0, 2, 16, FALSE, 0, complain_overflow_signed, tic4x_relocation, "ARELWORD", TRUE, 0x0000ffff, 0x0000ffff, FALSE), 109 HOWTO(R_REL24, 0, 2, 24, FALSE, 0, complain_overflow_signed, tic4x_relocation, "AREL24", TRUE, 0x00ffffff, 0x00ffffff, FALSE), 110 HOWTO(R_RELLONG, 0, 2, 32, FALSE, 0, complain_overflow_signed, tic4x_relocation, "ARELLONG", TRUE, 0xffffffff, 0xffffffff, FALSE), 111 HOWTO(R_PCRWORD, 0, 2, 16, TRUE, 0, complain_overflow_signed, tic4x_relocation, "APCRWORD", TRUE, 0x0000ffff, 0x0000ffff, FALSE), 112 HOWTO(R_PCR24, 0, 2, 24, TRUE, 0, complain_overflow_signed, tic4x_relocation, "APCR24", TRUE, 0x00ffffff, 0x00ffffff, FALSE), 113 HOWTO(R_PARTLS16, 0, 2, 16, FALSE, 0, complain_overflow_dont, tic4x_relocation, "APARTLS16", TRUE, 0x0000ffff, 0x0000ffff, FALSE), 114 HOWTO(R_PARTMS8, 16, 2, 16, FALSE, 0, complain_overflow_dont, tic4x_relocation, "APARTMS8", TRUE, 0x0000ffff, 0x0000ffff, FALSE), 115}; 116#define HOWTO_SIZE (sizeof(tic4x_howto_table) / sizeof(tic4x_howto_table[0])) 117 118#undef coff_bfd_reloc_type_lookup 119#define coff_bfd_reloc_type_lookup tic4x_coff_reloc_type_lookup 120#undef coff_bfd_reloc_name_lookup 121#define coff_bfd_reloc_name_lookup tic4x_coff_reloc_name_lookup 122 123/* For the case statement use the code values used tc_gen_reloc (defined in 124 bfd/reloc.c) to map to the howto table entries. */ 125 126static reloc_howto_type * 127tic4x_coff_reloc_type_lookup (abfd, code) 128 bfd *abfd ATTRIBUTE_UNUSED; 129 bfd_reloc_code_real_type code; 130{ 131 unsigned int type; 132 unsigned int i; 133 134 switch (code) 135 { 136 case BFD_RELOC_32: type = R_RELLONG; break; 137 case BFD_RELOC_24: type = R_REL24; break; 138 case BFD_RELOC_16: type = R_RELWORD; break; 139 case BFD_RELOC_24_PCREL: type = R_PCR24; break; 140 case BFD_RELOC_16_PCREL: type = R_PCRWORD; break; 141 case BFD_RELOC_HI16: type = R_PARTMS8; break; 142 case BFD_RELOC_LO16: type = R_PARTLS16; break; 143 default: 144 return NULL; 145 } 146 147 for (i = 0; i < HOWTO_SIZE; i++) 148 { 149 if (tic4x_howto_table[i].type == type) 150 return tic4x_howto_table + i; 151 } 152 return NULL; 153} 154 155static reloc_howto_type * 156tic4x_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 157 const char *r_name) 158{ 159 unsigned int i; 160 161 for (i = 0; 162 i < sizeof (tic4x_howto_table) / sizeof (tic4x_howto_table[0]); 163 i++) 164 if (tic4x_howto_table[i].name != NULL 165 && strcasecmp (tic4x_howto_table[i].name, r_name) == 0) 166 return &tic4x_howto_table[i]; 167 168 return NULL; 169} 170 171/* Code to turn a r_type into a howto ptr, uses the above howto table. 172 Called after some initial checking by the tic4x_rtype_to_howto fn 173 below. */ 174static void 175tic4x_lookup_howto (internal, dst) 176 arelent *internal; 177 struct internal_reloc *dst; 178{ 179 unsigned int i; 180 int bank = (dst->r_symndx == -1) ? HOWTO_BANK : 0; 181 182 for (i = 0; i < HOWTO_SIZE; i++) 183 { 184 if (tic4x_howto_table[i].type == dst->r_type) 185 { 186 internal->howto = tic4x_howto_table + i + bank; 187 return; 188 } 189 } 190 191 (*_bfd_error_handler) (_("Unrecognized reloc type 0x%x"), 192 (unsigned int) dst->r_type); 193 abort(); 194} 195 196static reloc_howto_type * 197coff_tic4x_rtype_to_howto (abfd, sec, rel, h, sym, addendp) 198 bfd *abfd ATTRIBUTE_UNUSED; 199 asection *sec; 200 struct internal_reloc *rel; 201 struct coff_link_hash_entry *h ATTRIBUTE_UNUSED; 202 struct internal_syment *sym ATTRIBUTE_UNUSED; 203 bfd_vma *addendp; 204{ 205 arelent genrel; 206 207 if (rel->r_symndx == -1 && addendp != NULL) 208 /* This is a TI "internal relocation", which means that the relocation 209 amount is the amount by which the current section is being relocated 210 in the output section. */ 211 *addendp = (sec->output_section->vma + sec->output_offset) - sec->vma; 212 213 tic4x_lookup_howto (&genrel, rel); 214 215 return genrel.howto; 216} 217 218 219static void 220tic4x_reloc_processing (relent, reloc, symbols, abfd, section) 221 arelent *relent; 222 struct internal_reloc *reloc; 223 asymbol **symbols; 224 bfd *abfd; 225 asection *section; 226{ 227 asymbol *ptr; 228 229 relent->address = reloc->r_vaddr; 230 231 if (reloc->r_symndx != -1) 232 { 233 if (reloc->r_symndx < 0 || reloc->r_symndx >= obj_conv_table_size (abfd)) 234 { 235 (*_bfd_error_handler) 236 (_("%s: warning: illegal symbol index %ld in relocs"), 237 bfd_get_filename (abfd), reloc->r_symndx); 238 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; 239 ptr = NULL; 240 } 241 else 242 { 243 relent->sym_ptr_ptr = (symbols 244 + obj_convert (abfd)[reloc->r_symndx]); 245 ptr = *(relent->sym_ptr_ptr); 246 } 247 } 248 else 249 { 250 relent->sym_ptr_ptr = section->symbol_ptr_ptr; 251 ptr = *(relent->sym_ptr_ptr); 252 } 253 254 /* The symbols definitions that we have read in have been relocated 255 as if their sections started at 0. But the offsets refering to 256 the symbols in the raw data have not been modified, so we have to 257 have a negative addend to compensate. 258 259 Note that symbols which used to be common must be left alone. */ 260 261 /* Calculate any reloc addend by looking at the symbol. */ 262 CALC_ADDEND (abfd, ptr, *reloc, relent); 263 264 relent->address -= section->vma; 265 /* !! relent->section = (asection *) NULL; */ 266 267 /* Fill in the relent->howto field from reloc->r_type. */ 268 tic4x_lookup_howto (relent, reloc); 269} 270 271 272/* TI COFF v0, DOS tools (little-endian headers). */ 273CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff0_vec, "coff0-tic4x", HAS_LOAD_PAGE, 0, '_', NULL, (PTR)&ticoff0_swap_table); 274 275/* TI COFF v0, SPARC tools (big-endian headers). */ 276CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff0_beh_vec, "coff0-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff0_vec, (PTR)&ticoff0_swap_table); 277 278/* TI COFF v1, DOS tools (little-endian headers). */ 279CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff1_vec, "coff1-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff0_beh_vec, (PTR)&ticoff1_swap_table); 280 281/* TI COFF v1, SPARC tools (big-endian headers). */ 282CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff1_beh_vec, "coff1-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff1_vec, (PTR)&ticoff1_swap_table); 283 284/* TI COFF v2, TI DOS tools output (little-endian headers). */ 285CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff2_vec, "coff2-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff1_beh_vec, COFF_SWAP_TABLE); 286 287/* TI COFF v2, TI SPARC tools output (big-endian headers). */ 288CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff2_beh_vec, "coff2-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff2_vec, COFF_SWAP_TABLE); 289