1/* BFD back-end for TMS320C4X coff binaries. 2 Copyright 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2005 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 2 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 "bfd.h" 25#include "sysdep.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 120 121/* For the case statement use the code values used tc_gen_reloc (defined in 122 bfd/reloc.c) to map to the howto table entries. */ 123 124static reloc_howto_type * 125tic4x_coff_reloc_type_lookup (abfd, code) 126 bfd *abfd ATTRIBUTE_UNUSED; 127 bfd_reloc_code_real_type code; 128{ 129 unsigned int type; 130 unsigned int i; 131 132 switch (code) 133 { 134 case BFD_RELOC_32: type = R_RELLONG; break; 135 case BFD_RELOC_24: type = R_REL24; break; 136 case BFD_RELOC_16: type = R_RELWORD; break; 137 case BFD_RELOC_24_PCREL: type = R_PCR24; break; 138 case BFD_RELOC_16_PCREL: type = R_PCRWORD; break; 139 case BFD_RELOC_HI16: type = R_PARTMS8; break; 140 case BFD_RELOC_LO16: type = R_PARTLS16; break; 141 default: 142 return NULL; 143 } 144 145 for (i = 0; i < HOWTO_SIZE; i++) 146 { 147 if (tic4x_howto_table[i].type == type) 148 return tic4x_howto_table + i; 149 } 150 return NULL; 151} 152 153 154/* Code to turn a r_type into a howto ptr, uses the above howto table. 155 Called after some initial checking by the tic4x_rtype_to_howto fn 156 below. */ 157static void 158tic4x_lookup_howto (internal, dst) 159 arelent *internal; 160 struct internal_reloc *dst; 161{ 162 unsigned int i; 163 int bank = (dst->r_symndx == -1) ? HOWTO_BANK : 0; 164 165 for (i = 0; i < HOWTO_SIZE; i++) 166 { 167 if (tic4x_howto_table[i].type == dst->r_type) 168 { 169 internal->howto = tic4x_howto_table + i + bank; 170 return; 171 } 172 } 173 174 (*_bfd_error_handler) (_("Unrecognized reloc type 0x%x"), 175 (unsigned int) dst->r_type); 176 abort(); 177} 178 179static reloc_howto_type * 180coff_tic4x_rtype_to_howto (abfd, sec, rel, h, sym, addendp) 181 bfd *abfd ATTRIBUTE_UNUSED; 182 asection *sec; 183 struct internal_reloc *rel; 184 struct coff_link_hash_entry *h ATTRIBUTE_UNUSED; 185 struct internal_syment *sym ATTRIBUTE_UNUSED; 186 bfd_vma *addendp; 187{ 188 arelent genrel; 189 190 if (rel->r_symndx == -1 && addendp != NULL) 191 /* This is a TI "internal relocation", which means that the relocation 192 amount is the amount by which the current section is being relocated 193 in the output section. */ 194 *addendp = (sec->output_section->vma + sec->output_offset) - sec->vma; 195 196 tic4x_lookup_howto (&genrel, rel); 197 198 return genrel.howto; 199} 200 201 202static void 203tic4x_reloc_processing (relent, reloc, symbols, abfd, section) 204 arelent *relent; 205 struct internal_reloc *reloc; 206 asymbol **symbols; 207 bfd *abfd; 208 asection *section; 209{ 210 asymbol *ptr; 211 212 relent->address = reloc->r_vaddr; 213 214 if (reloc->r_symndx != -1) 215 { 216 if (reloc->r_symndx < 0 || reloc->r_symndx >= obj_conv_table_size (abfd)) 217 { 218 (*_bfd_error_handler) 219 (_("%s: warning: illegal symbol index %ld in relocs"), 220 bfd_get_filename (abfd), reloc->r_symndx); 221 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; 222 ptr = NULL; 223 } 224 else 225 { 226 relent->sym_ptr_ptr = (symbols 227 + obj_convert (abfd)[reloc->r_symndx]); 228 ptr = *(relent->sym_ptr_ptr); 229 } 230 } 231 else 232 { 233 relent->sym_ptr_ptr = section->symbol_ptr_ptr; 234 ptr = *(relent->sym_ptr_ptr); 235 } 236 237 /* The symbols definitions that we have read in have been relocated 238 as if their sections started at 0. But the offsets refering to 239 the symbols in the raw data have not been modified, so we have to 240 have a negative addend to compensate. 241 242 Note that symbols which used to be common must be left alone. */ 243 244 /* Calculate any reloc addend by looking at the symbol. */ 245 CALC_ADDEND (abfd, ptr, *reloc, relent); 246 247 relent->address -= section->vma; 248 /* !! relent->section = (asection *) NULL; */ 249 250 /* Fill in the relent->howto field from reloc->r_type. */ 251 tic4x_lookup_howto (relent, reloc); 252} 253 254 255/* TI COFF v0, DOS tools (little-endian headers). */ 256CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff0_vec, "coff0-tic4x", HAS_LOAD_PAGE, 0, '_', NULL, (PTR)&ticoff0_swap_table); 257 258/* TI COFF v0, SPARC tools (big-endian headers). */ 259CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff0_beh_vec, "coff0-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff0_vec, (PTR)&ticoff0_swap_table); 260 261/* TI COFF v1, DOS tools (little-endian headers). */ 262CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff1_vec, "coff1-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff0_beh_vec, (PTR)&ticoff1_swap_table); 263 264/* TI COFF v1, SPARC tools (big-endian headers). */ 265CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff1_beh_vec, "coff1-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff1_vec, (PTR)&ticoff1_swap_table); 266 267/* TI COFF v2, TI DOS tools output (little-endian headers). */ 268CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff2_vec, "coff2-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff1_beh_vec, COFF_SWAP_TABLE); 269 270/* TI COFF v2, TI SPARC tools output (big-endian headers). */ 271CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff2_beh_vec, "coff2-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff2_vec, COFF_SWAP_TABLE); 272