| 1 | /* mri.c -- handle MRI style linker scripts |
| 2 | Copyright 1991, 92, 93, 94, 95, 96, 1997, 1998, 2000 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GLD, the Gnu Linker. |
| 6 | |
| 7 | GLD is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GLD is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GLD; see the file COPYING. If not, write to the Free |
| 19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 20 | 02111-1307, USA. |
| 21 | |
| 22 | This bit does the tree decoration when MRI style link scripts |
| 23 | are parsed. |
| 24 | |
| 25 | Contributed by Steve Chamberlain <sac@cygnus.com>. */ |
| 26 | |
| 27 | #include "bfd.h" |
| 28 | #include "sysdep.h" |
| 29 | #include "ld.h" |
| 30 | #include "ldexp.h" |
| 31 | #include "ldlang.h" |
| 32 | #include "ldmisc.h" |
| 33 | #include "mri.h" |
| 34 | #include "ldgram.h" |
| 35 | #include "libiberty.h" |
| 36 | |
| 37 | struct section_name_struct { |
| 38 | struct section_name_struct *next; |
| 39 | CONST char *name; |
| 40 | CONST char *alias; |
| 41 | etree_type *vma; |
| 42 | etree_type *align; |
| 43 | etree_type *subalign; |
| 44 | int ok_to_load; |
| 45 | }; |
| 46 | |
| 47 | unsigned int symbol_truncate = 10000; |
| 48 | struct section_name_struct *order; |
| 49 | struct section_name_struct *only_load; |
| 50 | struct section_name_struct *address; |
| 51 | struct section_name_struct *alias; |
| 52 | |
| 53 | struct section_name_struct *alignment; |
| 54 | struct section_name_struct *subalignment; |
| 55 | |
| 56 | static struct section_name_struct **lookup |
| 57 | PARAMS ((const char *name, struct section_name_struct **list)); |
| 58 | static void mri_add_to_list PARAMS ((struct section_name_struct **list, |
| 59 | const char *name, etree_type *vma, |
| 60 | const char *zalias, etree_type *align, |
| 61 | etree_type *subalign)); |
| 62 | |
| 63 | static struct section_name_struct ** |
| 64 | lookup (name, list) |
| 65 | CONST char *name; |
| 66 | struct section_name_struct **list; |
| 67 | { |
| 68 | struct section_name_struct **ptr = list; |
| 69 | |
| 70 | while (*ptr) |
| 71 | { |
| 72 | if (strcmp (name, (*ptr)->name) == 0) |
| 73 | /* If this is a match, delete it, we only keep the last instance |
| 74 | of any name. */ |
| 75 | *ptr = (*ptr)->next; |
| 76 | else |
| 77 | ptr = &((*ptr)->next); |
| 78 | } |
| 79 | |
| 80 | *ptr = (struct section_name_struct *) xmalloc (sizeof (struct section_name_struct)); |
| 81 | return ptr; |
| 82 | } |
| 83 | |
| 84 | static void |
| 85 | mri_add_to_list (list, name, vma, zalias, align, subalign) |
| 86 | struct section_name_struct **list; |
| 87 | CONST char *name; |
| 88 | etree_type *vma; |
| 89 | CONST char *zalias; |
| 90 | etree_type *align; |
| 91 | etree_type *subalign; |
| 92 | { |
| 93 | struct section_name_struct **ptr = lookup (name, list); |
| 94 | |
| 95 | (*ptr)->name = name; |
| 96 | (*ptr)->vma = vma; |
| 97 | (*ptr)->next = (struct section_name_struct *) NULL; |
| 98 | (*ptr)->ok_to_load = 0; |
| 99 | (*ptr)->alias = zalias; |
| 100 | (*ptr)->align = align; |
| 101 | (*ptr)->subalign = subalign; |
| 102 | } |
| 103 | |
| 104 | void |
| 105 | mri_output_section (name, vma) |
| 106 | CONST char *name; |
| 107 | etree_type *vma; |
| 108 | { |
| 109 | mri_add_to_list (&address, name, vma, 0, 0, 0); |
| 110 | } |
| 111 | |
| 112 | /* If any ABSOLUTE <name> are in the script, only load those files |
| 113 | marked thus. */ |
| 114 | |
| 115 | void |
| 116 | mri_only_load (name) |
| 117 | CONST char *name; |
| 118 | { |
| 119 | mri_add_to_list (&only_load, name, 0, 0, 0, 0); |
| 120 | } |
| 121 | |
| 122 | void |
| 123 | mri_base (exp) |
| 124 | etree_type *exp; |
| 125 | { |
| 126 | base = exp; |
| 127 | } |
| 128 | |
| 129 | static int done_tree = 0; |
| 130 | |
| 131 | void |
| 132 | mri_draw_tree () |
| 133 | { |
| 134 | if (done_tree) |
| 135 | return; |
| 136 | |
| 137 | #if 0 /* We don't bother with memory regions. */ |
| 138 | /* Create the regions. */ |
| 139 | { |
| 140 | lang_memory_region_type *r; |
| 141 | |
| 142 | r = lang_memory_region_lookup("long"); |
| 143 | r->current = r->origin = exp_get_vma (base, (bfd_vma)0, "origin", |
| 144 | lang_first_phase_enum); |
| 145 | r->length = (bfd_size_type) exp_get_vma (0, (bfd_vma) ~((bfd_size_type)0), |
| 146 | "length", lang_first_phase_enum); |
| 147 | } |
| 148 | #endif |
| 149 | |
| 150 | /* Now build the statements for the ldlang machine. */ |
| 151 | |
| 152 | /* Attatch the addresses of any which have addresses, |
| 153 | and add the ones not mentioned. */ |
| 154 | if (address != (struct section_name_struct *) NULL) |
| 155 | { |
| 156 | struct section_name_struct *alist; |
| 157 | struct section_name_struct *olist; |
| 158 | |
| 159 | if (order == (struct section_name_struct *) NULL) |
| 160 | order = address; |
| 161 | |
| 162 | for (alist = address; |
| 163 | alist != (struct section_name_struct *) NULL; |
| 164 | alist = alist->next) |
| 165 | { |
| 166 | int done = 0; |
| 167 | |
| 168 | for (olist = order; |
| 169 | done == 0 && olist != (struct section_name_struct *) NULL; |
| 170 | olist = olist->next) |
| 171 | { |
| 172 | if (strcmp (alist->name, olist->name) == 0) |
| 173 | { |
| 174 | olist->vma = alist->vma; |
| 175 | done = 1; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | if (!done) |
| 180 | { |
| 181 | /* Add this onto end of order list. */ |
| 182 | mri_add_to_list (&order, alist->name, alist->vma, 0, 0, 0); |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /* If we're only supposed to load a subset of them in, then prune |
| 188 | the list. */ |
| 189 | if (only_load != (struct section_name_struct *) NULL) |
| 190 | { |
| 191 | struct section_name_struct *ptr1; |
| 192 | struct section_name_struct *ptr2; |
| 193 | |
| 194 | if (order == (struct section_name_struct *) NULL) |
| 195 | order = only_load; |
| 196 | |
| 197 | /* See if this name is in the list, if it is then we can load it. */ |
| 198 | for (ptr1 = only_load; ptr1; ptr1 = ptr1->next) |
| 199 | for (ptr2 = order; ptr2; ptr2 = ptr2->next) |
| 200 | if (strcmp (ptr2->name, ptr1->name) == 0) |
| 201 | ptr2->ok_to_load = 1; |
| 202 | } |
| 203 | else |
| 204 | { |
| 205 | /* No only load list, so everything is ok to load. */ |
| 206 | struct section_name_struct *ptr; |
| 207 | |
| 208 | for (ptr = order; ptr; ptr = ptr->next) |
| 209 | ptr->ok_to_load = 1; |
| 210 | } |
| 211 | |
| 212 | /* Create the order of sections to load. */ |
| 213 | if (order != (struct section_name_struct *) NULL) |
| 214 | { |
| 215 | /* Been told to output the sections in a certain order. */ |
| 216 | struct section_name_struct *p = order; |
| 217 | |
| 218 | while (p) |
| 219 | { |
| 220 | struct section_name_struct *aptr; |
| 221 | etree_type *align = 0; |
| 222 | etree_type *subalign = 0; |
| 223 | |
| 224 | /* See if an alignment has been specified. */ |
| 225 | for (aptr = alignment; aptr; aptr = aptr->next) |
| 226 | if (strcmp (aptr->name, p->name) == 0) |
| 227 | align = aptr->align; |
| 228 | |
| 229 | for (aptr = subalignment; aptr; aptr = aptr->next) |
| 230 | if (strcmp (aptr->name, p->name) == 0) |
| 231 | subalign = aptr->subalign; |
| 232 | |
| 233 | if (base == 0) |
| 234 | base = p->vma ? p->vma : exp_nameop (NAME, "."); |
| 235 | |
| 236 | lang_enter_output_section_statement (p->name, base, |
| 237 | p->ok_to_load ? 0 : noload_section, |
| 238 | 1, align, subalign, |
| 239 | (etree_type *) NULL); |
| 240 | base = 0; |
| 241 | lang_add_wild (p->name, false, (char *) NULL, false, false, NULL); |
| 242 | |
| 243 | /* If there is an alias for this section, add it too. */ |
| 244 | for (aptr = alias; aptr; aptr = aptr->next) |
| 245 | if (strcmp (aptr->alias, p->name) == 0) |
| 246 | lang_add_wild (aptr->name, false, (char *) NULL, false, false, NULL); |
| 247 | |
| 248 | lang_leave_output_section_statement |
| 249 | (0, "*default*", (struct lang_output_section_phdr_list *) NULL, |
| 250 | "*default*"); |
| 251 | |
| 252 | p = p->next; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | done_tree = 1; |
| 257 | } |
| 258 | |
| 259 | void |
| 260 | mri_load (name) |
| 261 | CONST char *name; |
| 262 | { |
| 263 | base = 0; |
| 264 | lang_add_input_file (name, |
| 265 | lang_input_file_is_file_enum, (char *) NULL); |
| 266 | #if 0 |
| 267 | lang_leave_output_section_statement (0, "*default*"); |
| 268 | #endif |
| 269 | } |
| 270 | |
| 271 | void |
| 272 | mri_order (name) |
| 273 | CONST char *name; |
| 274 | { |
| 275 | mri_add_to_list (&order, name, 0, 0, 0, 0); |
| 276 | } |
| 277 | |
| 278 | void |
| 279 | mri_alias (want, is, isn) |
| 280 | CONST char *want; |
| 281 | CONST char *is; |
| 282 | int isn; |
| 283 | { |
| 284 | if (!is) |
| 285 | { |
| 286 | char buf[20]; |
| 287 | |
| 288 | /* Some sections are digits. */ |
| 289 | sprintf (buf, "%d", isn); |
| 290 | |
| 291 | is = xstrdup (buf); |
| 292 | |
| 293 | if (is == NULL) |
| 294 | abort (); |
| 295 | } |
| 296 | |
| 297 | mri_add_to_list (&alias, is, 0, want, 0, 0); |
| 298 | } |
| 299 | |
| 300 | void |
| 301 | mri_name (name) |
| 302 | CONST char *name; |
| 303 | { |
| 304 | lang_add_output (name, 1); |
| 305 | } |
| 306 | |
| 307 | void |
| 308 | mri_format (name) |
| 309 | CONST char *name; |
| 310 | { |
| 311 | if (strcmp (name, "S") == 0) |
| 312 | lang_add_output_format ("srec", (char *) NULL, (char *) NULL, 1); |
| 313 | |
| 314 | else if (strcmp (name, "IEEE") == 0) |
| 315 | lang_add_output_format ("ieee", (char *) NULL, (char *) NULL, 1); |
| 316 | |
| 317 | else if (strcmp (name, "COFF") == 0) |
| 318 | lang_add_output_format ("coff-m68k", (char *) NULL, (char *) NULL, 1); |
| 319 | |
| 320 | else |
| 321 | einfo (_("%P%F: unknown format type %s\n"), name); |
| 322 | } |
| 323 | |
| 324 | void |
| 325 | mri_public (name, exp) |
| 326 | CONST char *name; |
| 327 | etree_type *exp; |
| 328 | { |
| 329 | lang_add_assignment (exp_assop ('=', name, exp)); |
| 330 | } |
| 331 | |
| 332 | void |
| 333 | mri_align (name, exp) |
| 334 | CONST char *name; |
| 335 | etree_type *exp; |
| 336 | { |
| 337 | mri_add_to_list (&alignment, name, 0, 0, exp, 0); |
| 338 | } |
| 339 | |
| 340 | void |
| 341 | mri_alignmod (name, exp) |
| 342 | CONST char *name; |
| 343 | etree_type *exp; |
| 344 | { |
| 345 | mri_add_to_list (&subalignment, name, 0, 0, 0, exp); |
| 346 | } |
| 347 | |
| 348 | void |
| 349 | mri_truncate (exp) |
| 350 | unsigned int exp; |
| 351 | { |
| 352 | symbol_truncate = exp; |
| 353 | } |