| 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 | |
| 35 | static bfd_boolean ticoff_bfd_is_local_label_name |
| 36 | PARAMS ((bfd *, const char *)); |
| 37 | static bfd_reloc_status_type tic4x_relocation |
| 38 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char ** )); |
| 39 | static reloc_howto_type *tic4x_coff_reloc_type_lookup |
| 40 | PARAMS ((bfd *, bfd_reloc_code_real_type )); |
| 41 | static void tic4x_lookup_howto |
| 42 | PARAMS ((arelent *, struct internal_reloc * )); |
| 43 | static 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 * )); |
| 45 | static 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. */ |
| 51 | static bfd_boolean |
| 52 | ticoff_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 | |
| 77 | static bfd_reloc_status_type |
| 78 | tic4x_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 | |
| 99 | reloc_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 | |
| 124 | static reloc_howto_type * |
| 125 | tic4x_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. */ |
| 157 | static void |
| 158 | tic4x_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 | |
| 179 | static reloc_howto_type * |
| 180 | coff_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 | |
| 202 | static void |
| 203 | tic4x_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). */ |
| 256 | CREATE_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). */ |
| 259 | CREATE_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). */ |
| 262 | CREATE_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). */ |
| 265 | CREATE_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). */ |
| 268 | CREATE_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). */ |
| 271 | CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff2_beh_vec, "coff2-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff2_vec, COFF_SWAP_TABLE); |