ld/emultempl/aix.em

   1 # This shell script emits a C file. -*- C -*-
   2 # It does some substitutions.
   3 cat >e${EMULATION_NAME}.c <<EOF
   4 /* This file is is generated by a shell script.  DO NOT EDIT! */
   5
   6 /* AIX emulation code for ${EMULATION_NAME}
   7    Copyright (C) 1991, 1993, 1995 Free Software Foundation, Inc.
   8    Written by Steve Chamberlain <sac@cygnus.com>
   9    AIX support by Ian Lance Taylor <ian@cygnus.com>
  10
  11 This file is part of GLD, the Gnu Linker.
  12
  13 This program is free software; you can redistribute it and/or modify
  14 it under the terms of the GNU General Public License as published by
  15 the Free Software Foundation; either version 2 of the License, or
  16 (at your option) any later version.
  17
  18 This program is distributed in the hope that it will be useful,
  19 but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 GNU General Public License for more details.
  22
  23 You should have received a copy of the GNU General Public License
  24 along with this program; if not, write to the Free Software
  25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  26
  27 #define TARGET_IS_${EMULATION_NAME}
  28
  29 #include "bfd.h"
  30 #include "sysdep.h"
  31 #include "libiberty.h"
  32 #include "getopt.h"
  33 #include "bfdlink.h"
  34
  35 #include <ctype.h>
  36
  37 #include "ld.h"
  38 #include "ldmain.h"
  39 #include "ldemul.h"
  40 #include "ldfile.h"
  41 #include "ldmisc.h"
  42 #include "ldexp.h"
  43 #include "ldlang.h"
  44
  45 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
  46 static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **));
  47 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
  48 static void gld${EMULATION_NAME}_read_file PARAMS ((const char *, boolean));
  49 static void gld${EMULATION_NAME}_free PARAMS ((PTR));
  50 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
  51
  52 /* The file alignment required for each section.  */
  53 static unsigned long file_align;
  54
  55 /* The maximum size the stack is permitted to grow.  This is stored in
  56    the a.out header.  */
  57 static unsigned long maxstack;
  58
  59 /* The maximum data size.  This is stored in the a.out header.  */
  60 static unsigned long maxdata;
  61
  62 /* Whether to perform garbage collection.  */
  63 static int gc = 1;
  64
  65 /* The module type to use.  */
  66 static unsigned short modtype = ('1' << 8) | 'L';
  67
  68 /* Whether the .text section must be read-only (i.e., no relocs
  69    permitted).  */
  70 static int textro;
  71
  72 /* Structure used to hold import or export file list.  */
  73
  74 struct filelist
  75 {
  76   struct filelist *next;
  77   const char *name;
  78 };
  79
  80 /* List of import files.  */
  81 struct filelist *import_files;
  82
  83 /* List of export files.  */
  84 struct filelist *export_files;
  85
  86 static void
  87 gld${EMULATION_NAME}_before_parse()
  88 {
  89 #ifndef TARGET_                 /* I.e., if not generic.  */
  90   ldfile_output_architecture = bfd_arch_${ARCH};
  91 #endif /* not TARGET_ */
  92 }
  93
  94 /* Handle AIX specific options.  */
  95
  96 static int
  97 gld${EMULATION_NAME}_parse_args (argc, argv)
  98      int argc;
  99      char **argv;
 100 {
 101   int prevoptind = optind;
 102   int prevopterr = opterr;
 103   int longind;
 104   int optc;
 105   long val;
 106   char *end;
 107
 108 #define OPTION_IGNORE (300)
 109 #define OPTION_AUTOIMP (OPTION_IGNORE + 1)
 110 #define OPTION_ERNOTOK (OPTION_AUTOIMP + 1)
 111 #define OPTION_EROK (OPTION_ERNOTOK + 1)
 112 #define OPTION_EXPORT (OPTION_EROK + 1)
 113 #define OPTION_IMPORT (OPTION_EXPORT + 1)
 114 #define OPTION_MAXDATA (OPTION_IMPORT + 1)
 115 #define OPTION_MAXSTACK (OPTION_MAXDATA + 1)
 116 #define OPTION_MODTYPE (OPTION_MAXSTACK + 1)
 117 #define OPTION_NOAUTOIMP (OPTION_MODTYPE + 1)
 118 #define OPTION_NOSTRCMPCT (OPTION_NOAUTOIMP + 1)
 119 #define OPTION_STRCMPCT (OPTION_NOSTRCMPCT + 1)
 120
 121   static struct option longopts[] = {
 122     {"basis", no_argument, NULL, OPTION_IGNORE},
 123     {"bautoimp", no_argument, NULL, OPTION_AUTOIMP},
 124     {"bcomprld", no_argument, NULL, OPTION_IGNORE},
 125     {"bcrld", no_argument, NULL, OPTION_IGNORE},
 126     {"bcror31", no_argument, NULL, OPTION_IGNORE},
 127     {"bD", required_argument, NULL, OPTION_MAXDATA},
 128     {"bE", required_argument, NULL, OPTION_EXPORT},
 129     {"bernotok", no_argument, NULL, OPTION_ERNOTOK},
 130     {"berok", no_argument, NULL, OPTION_EROK},
 131     {"berrmsg", no_argument, NULL, OPTION_IGNORE},
 132     {"bexport", required_argument, NULL, OPTION_EXPORT},
 133     {"bf", no_argument, NULL, OPTION_ERNOTOK},
 134     {"bgc", no_argument, &gc, 1},
 135     {"bh", required_argument, NULL, OPTION_IGNORE},
 136     {"bhalt", required_argument, NULL, OPTION_IGNORE},
 137     {"bI", required_argument, NULL, OPTION_IMPORT},
 138     {"bimport", required_argument, NULL, OPTION_IMPORT},
 139     {"bmaxdata", required_argument, NULL, OPTION_MAXDATA},
 140     {"bmaxstack", required_argument, NULL, OPTION_MAXSTACK},
 141     {"bM", required_argument, NULL, OPTION_MODTYPE},
 142     {"bmodtype", required_argument, NULL, OPTION_MODTYPE},
 143     {"bnoautoimp", no_argument, NULL, OPTION_NOAUTOIMP},
 144     {"bnodelcsect", no_argument, NULL, OPTION_IGNORE},
 145     {"bnogc", no_argument, &gc, 0},
 146     {"bnso", no_argument, NULL, OPTION_NOAUTOIMP},
 147     {"bnostrcmpct", no_argument, NULL, OPTION_NOSTRCMPCT},
 148     {"bnotextro", no_argument, &textro, 0},
 149     {"bnro", no_argument, &textro, 0},
 150     {"bro", no_argument, &textro, 1},
 151     {"bS", required_argument, NULL, OPTION_MAXSTACK},
 152     {"bso", no_argument, NULL, OPTION_AUTOIMP},
 153     {"bstrcmpct", no_argument, NULL, OPTION_STRCMPCT},
 154     {"btextro", no_argument, &textro, 1},
 155     {"static", no_argument, NULL, OPTION_NOAUTOIMP},
 156     {NULL, no_argument, NULL, 0}
 157   };
 158
 159   /* Options supported by the AIX linker which we do not support: -f,
 160      -S, -v, -Z, -bbindcmds, -bbinder, -bbindopts, -bcalls, -bcaps,
 161      -bcror15, -bdebugopt, -bdbg, -bdelcsect, -bex?, -bfilelist, -bfl,
 162      -bgcbypass, -bglink, -binsert, -bi, -bloadmap, -bl, -bmap, -bnl,
 163      -bnobind, -bnocomprld, -bnocrld, -bnoerrmsg, -bnoglink,
 164      -bnoloadmap, -bnl, -bnoobjreorder, -bnoquiet, -bnoreorder,
 165      -bnotypchk, -bnox, -bquiet, -bR, -brename, -breorder, -btypchk,
 166      -bx, -bX, -bxref.  */
 167
 168   /* If the first option starts with -b, change the first : to an =.
 169      The AIX linker uses : to separate the option from the argument;
 170      changing it to = lets us treat it as a getopt option.  */
 171   if (optind < argc && strncmp (argv[optind], "-b", 2) == 0)
 172     {
 173       char *s;
 174
 175       for (s = argv[optind]; *s != '\0'; s++)
 176         {
 177           if (*s == ':')
 178             {
 179               *s = '=';
 180               break;
 181             }
 182         }
 183     }
 184
 185   opterr = 0;
 186   optc = getopt_long_only (argc, argv, "-D:H:KT:z", longopts, &longind);
 187   opterr = prevopterr;
 188
 189   switch (optc)
 190     {
 191     default:
 192       optind = prevoptind;
 193       return 0;
 194
 195     case 0:
 196       /* Long option which just sets a flag.  */
 197       break;
 198
 199     case 'D':
 200       val = strtol (optarg, &end, 0);
 201       if (*end != '\0')
 202         einfo ("%P: warning: ignoring invalid -D number %s\n", optarg);
 203       else if (val != -1)
 204         lang_section_start (".data", exp_intop (val));
 205       break;
 206
 207     case 'H':
 208       val = strtoul (optarg, &end, 0);
 209       if (*end != '\0'
 210           || (val & (val - 1)) != 0)
 211         einfo ("%P: warning: ignoring invalid -H number %s\n", optarg);
 212       else
 213         file_align = val;
 214       break;
 215
 216     case 'K':
 217     case 'z':
 218       /* FIXME: This should use the page size for the target system.  */
 219       file_align = 4096;
 220       break;
 221
 222     case 'T':
 223       /* On AIX this is the same as GNU ld -Ttext.  When we see -T
 224          number, we assume the AIX option is intended.  Otherwise, we
 225          assume the usual GNU ld -T option is intended.  We can't just
 226          ignore the AIX option, because gcc passes it to the linker.  */
 227       val = strtoul (optarg, &end, 0);
 228       if (*end != '\0')
 229         {
 230           optind = prevoptind;
 231           return 0;
 232         }
 233       lang_section_start (".text", exp_intop (val));
 234       break;
 235
 236     case OPTION_IGNORE:
 237       break;
 238
 239     case OPTION_AUTOIMP:
 240       link_info.static_link = false;
 241       break;
 242
 243     case OPTION_ERNOTOK:
 244       force_make_executable = false;
 245       break;
 246
 247     case OPTION_EROK:
 248       force_make_executable = true;
 249       break;
 250
 251     case OPTION_EXPORT:
 252     case OPTION_IMPORT:
 253       {
 254         struct filelist *n;
 255         struct filelist **flpp;
 256
 257         n = (struct filelist *) xmalloc (sizeof (struct filelist));
 258         n->next = NULL;
 259         n->name = optarg;
 260         if (optc == OPTION_EXPORT)
 261           flpp = &export_files;
 262         else
 263           flpp = &import_files;
 264         while (*flpp != NULL)
 265           flpp = &(*flpp)->next;
 266         *flpp = n;
 267       }
 268       break;
 269
 270     case OPTION_MAXDATA:
 271       val = strtoul (optarg, &end, 0);
 272       if (*end != '\0')
 273         einfo ("%P: warning: ignoring invalid -bmaxdata number %s\n",
 274                optarg);
 275       else
 276         maxdata = val;
 277       break;
 278
 279     case OPTION_MAXSTACK:
 280       val = strtoul (optarg, &end, 0);
 281       if (*end != '\0')
 282         einfo ("%P: warning: ignoring invalid -bmaxstack number %s\n",
 283                optarg);
 284       else
 285         maxstack = val;
 286       break;
 287
 288     case OPTION_MODTYPE:
 289       if (*optarg == 'S')
 290         {
 291           link_info.shared = true;
 292           ++optarg;
 293         }
 294       if (*optarg == '\0' || optarg[1] == '\0')
 295         einfo ("%P: warning: ignoring invalid module type %s\n", optarg);
 296       else
 297         modtype = (*optarg << 8) | optarg[1];
 298       break;
 299
 300     case OPTION_NOAUTOIMP:
 301       link_info.static_link = true;
 302       break;
 303
 304     case OPTION_NOSTRCMPCT:
 305       config.traditional_format = true;
 306       break;
 307
 308     case OPTION_STRCMPCT:
 309       config.traditional_format = false;
 310       break;
 311     }
 312
 313   return 1;
 314 }
 315
 316 /* This is called after the sections have been attached to output
 317    sections, but before any sizes or addresses have been set.  */
 318
 319 static void
 320 gld${EMULATION_NAME}_before_allocation ()
 321 {
 322   struct filelist *fl;
 323   char *libpath;
 324
 325   /* Handle the import and export files, if any.  */
 326   for (fl = import_files; fl != NULL; fl = fl->next)
 327     gld${EMULATION_NAME}_read_file (fl->name, true);
 328   for (fl = export_files; fl != NULL; fl = fl->next)
 329     gld${EMULATION_NAME}_read_file (fl->name, false);
 330
 331   /* We need to build LIBPATH from the -L arguments.  If any -rpath
 332      arguments were used, though, we use -rpath instead, as a GNU
 333      extension.  */
 334   if (command_line.rpath != NULL)
 335     libpath = command_line.rpath;
 336   else if (search_head == NULL)
 337     libpath = (char *) "";
 338   else
 339     {
 340       size_t len;
 341       search_dirs_type *search;
 342
 343       len = strlen (search_head->name);
 344       libpath = xmalloc (len + 1);
 345       strcpy (libpath, search_head->name);
 346       for (search = search_head->next; search != NULL; search = search->next)
 347         {
 348           size_t nlen;
 349
 350           nlen = strlen (search->name);
 351           libpath = xrealloc (libpath, len + nlen + 2);
 352           libpath[len] = ':';
 353           strcpy (libpath + len + 1, search->name);
 354           len += nlen + 1;
 355         }
 356     }
 357
 358   /* Let the XCOFF backend set up the .loader section.  */
 359   if (! bfd_xcoff_size_dynamic_sections (output_bfd, &link_info, libpath,
 360                                          entry_symbol, file_align,
 361                                          maxstack, maxdata,
 362                                          gc ? true : false,
 363                                          modtype,
 364                                          textro ? true : false))
 365     einfo ("%P%F: failed to set dynamic section sizes: %E\n");
 366 }
 367
 368 /* Read an import or export file.  */
 369
 370 static void
 371 gld${EMULATION_NAME}_read_file (filename, import)
 372      const char *filename;
 373      boolean import;
 374 {
 375   struct obstack *o;
 376   FILE *f;
 377   int lineno;
 378   int c;
 379   boolean keep;
 380   const char *imppath;
 381   const char *impfile;
 382   const char *impmember;
 383
 384   o = (struct obstack *) xmalloc (sizeof (struct obstack));
 385   obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
 386
 387   f = fopen (filename, "r");
 388   if (f == NULL)
 389     {
 390       bfd_set_error (bfd_error_system_call);
 391       einfo ("%F%s: %E\n", filename);
 392     }
 393
 394   keep = false;
 395
 396   imppath = NULL;
 397   impfile = NULL;
 398   impmember = NULL;
 399
 400   lineno = 0;
 401   while ((c = getc (f)) != EOF)
 402     {
 403       char *s;
 404       char *symname;
 405       boolean syscall;
 406       bfd_vma address;
 407       struct bfd_link_hash_entry *h;
 408
 409       if (c != '\n')
 410         {
 411           obstack_1grow (o, c);
 412           continue;
 413         }
 414
 415       obstack_1grow (o, '\0');
 416       ++lineno;
 417
 418       s = (char *) obstack_base (o);
 419       while (isspace ((unsigned char) *s))
 420         ++s;
 421       if (*s == '\0'
 422           || *s == '*'
 423           || (*s == '#' && s[1] == ' ')
 424           || (! import && *s == '#' && s[1] == '!'))
 425         {
 426           obstack_free (o, obstack_base (o));
 427           continue;
 428         }
 429
 430       if (*s == '#' && s[1] == '!')
 431         {
 432           s += 2;
 433           while (isspace ((unsigned char) *s))
 434             ++s;
 435           if (*s == '\0')
 436             {
 437               imppath = NULL;
 438               impfile = NULL;
 439               impmember = NULL;
 440               obstack_free (o, obstack_base (o));
 441             }
 442           else if (*s == '(')
 443             einfo ("%F%s%d: #! ([member]) is not supported in import files",
 444                    filename, lineno);
 445           else
 446             {
 447               char cs;
 448               char *file;
 449
 450               (void) obstack_finish (o);
 451               keep = true;
 452               imppath = s;
 453               impfile = NULL;
 454               while (! isspace ((unsigned char) *s) && *s != '(' && *s != '\0')
 455                 {
 456                   if (*s == '/')
 457                     file = s + 1;
 458                   ++s;
 459                 }
 460               if (file != NULL)
 461                 {
 462                   file[-1] = '\0';
 463                   impfile = file;
 464                   if (imppath == file - 1)
 465                     imppath = "/";
 466                 }
 467               else
 468                 {
 469                   impfile = imppath;
 470                   imppath = "";
 471                 }
 472               cs = *s;
 473               *s = '\0';
 474               while (isspace ((unsigned char) cs))
 475                 {
 476                   ++s;
 477                   cs = *s;
 478                 }
 479               if (cs != '(')
 480                 {
 481                   impmember = "";
 482                   if (cs != '\0')
 483                     einfo ("%s:%d: warning: syntax error in import file\n",
 484                            filename, lineno);
 485                 }
 486               else
 487                 {
 488                   ++s;
 489                   impmember = s;
 490                   while (*s != ')' && *s != '\0')
 491                     ++s;
 492                   if (*s == ')')
 493                     *s = '\0';
 494                   else
 495                     einfo ("%s:%d: warning: syntax error in import file\n",
 496                            filename, lineno);
 497                 }
 498             }
 499
 500           continue;
 501         }
 502
 503       /* This is a symbol to be imported or exported.  */
 504       symname = s;
 505       syscall = false;
 506       address = (bfd_vma) -1;
 507
 508       while (! isspace ((unsigned char) *s) && *s != '\0')
 509         ++s;
 510       if (*s != '\0')
 511         {
 512           char *se;
 513
 514           *s++ = '\0';
 515
 516           while (isspace ((unsigned char) *s))
 517             ++s;
 518
 519           se = s;
 520           while (! isspace ((unsigned char) *se) && *se != '\0')
 521             ++se;
 522           if (*se != '\0')
 523             {
 524               *se++ = '\0';
 525               while (isspace ((unsigned char) *se))
 526                 ++se;
 527               if (*se != '\0')
 528                 einfo ("%s%d: warning: syntax error in import/export file\n",
 529                        filename, lineno);
 530             }
 531
 532           if (strcasecmp (s, "svc") == 0
 533               || strcasecmp (s, "syscall") == 0)
 534             syscall = true;
 535           else
 536             {
 537               char *end;
 538
 539               address = strtoul (s, &end, 0);
 540               if (*end != '\0')
 541                 einfo ("%s:%d: warning: syntax error in import/export file\n",
 542                        filename, lineno);
 543             }
 544         }
 545
 546       h = bfd_link_hash_lookup (link_info.hash, symname, false, false, true);
 547       if (h == NULL || h->type == bfd_link_hash_new)
 548         {
 549           /* We can just ignore attempts to import an unreferenced
 550              symbol.  */
 551           if (! import)
 552             einfo ("%X%s:%d: attempt to export undefined symbol %s\n",
 553                    filename, lineno, symname);
 554         }
 555       else if (import)
 556         {
 557           if (! bfd_xcoff_import_symbol (output_bfd, &link_info, h, address,
 558                                          imppath, impfile, impmember))
 559             einfo ("%X%s:%d: failed to import symbol %s: %E\n",
 560                    filename, lineno, symname);
 561         }
 562       else
 563         {
 564           if (! bfd_xcoff_export_symbol (output_bfd, &link_info, h, syscall))
 565             einfo ("%X%s:%d: failed to export symbol %s: %E\n",
 566                    filename, lineno, symname);
 567         }
 568
 569       obstack_free (o, obstack_base (o));
 570     }
 571
 572   if (obstack_object_size (o) > 0)
 573     {
 574       einfo ("%s:%d: warning: ignoring unterminated last line\n",
 575              filename, lineno);
 576       obstack_free (o, obstack_base (o));
 577     }
 578
 579   if (! keep)
 580     {
 581       obstack_free (o, NULL);
 582       free (o);
 583     }
 584 }
 585
 586 /* This routine saves us from worrying about declaring free.  */
 587
 588 static void
 589 gld${EMULATION_NAME}_free (p)
 590      PTR p;
 591 {
 592   free (p);
 593 }
 594
 595 static char *
 596 gld${EMULATION_NAME}_get_script(isfile)
 597      int *isfile;
 598 EOF
 599
 600 if test -n "$COMPILE_IN"
 601 then
 602 # Scripts compiled in.
 603
 604 # sed commands to quote an ld script as a C string.
 605 sc="-f ${srcdir}/emultempl/stringify.sed"
 606
 607 cat >>e${EMULATION_NAME}.c <<EOF
 608 {
 609   *isfile = 0;
 610
 611   if (link_info.relocateable == true && config.build_constructors == true)
 612     return
 613 EOF
 614 sed $sc ldscripts/${EMULATION_NAME}.xu                     >> e${EMULATION_NAME}.c
 615 echo '  ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
 616 sed $sc ldscripts/${EMULATION_NAME}.xr                     >> e${EMULATION_NAME}.c
 617 echo '  ; else if (!config.text_read_only) return'         >> e${EMULATION_NAME}.c
 618 sed $sc ldscripts/${EMULATION_NAME}.xbn                    >> e${EMULATION_NAME}.c
 619 echo '  ; else if (!config.magic_demand_paged) return'     >> e${EMULATION_NAME}.c
 620 sed $sc ldscripts/${EMULATION_NAME}.xn                     >> e${EMULATION_NAME}.c
 621 echo '  ; else return'                                     >> e${EMULATION_NAME}.c
 622 sed $sc ldscripts/${EMULATION_NAME}.x                      >> e${EMULATION_NAME}.c
 623 echo '; }'                                                 >> e${EMULATION_NAME}.c
 624
 625 else
 626 # Scripts read from the filesystem.
 627
 628 cat >>e${EMULATION_NAME}.c <<EOF
 629 {
 630   *isfile = 1;
 631
 632   if (link_info.relocateable == true && config.build_constructors == true)
 633     return "ldscripts/${EMULATION_NAME}.xu";
 634   else if (link_info.relocateable == true)
 635     return "ldscripts/${EMULATION_NAME}.xr";
 636   else if (!config.text_read_only)
 637     return "ldscripts/${EMULATION_NAME}.xbn";
 638   else if (!config.magic_demand_paged)
 639     return "ldscripts/${EMULATION_NAME}.xn";
 640   else
 641     return "ldscripts/${EMULATION_NAME}.x";
 642 }
 643 EOF
 644
 645 fi
 646
 647 cat >>e${EMULATION_NAME}.c <<EOF
 648
 649 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 650 {
 651   gld${EMULATION_NAME}_before_parse,
 652   syslib_default,
 653   hll_default,
 654   after_parse_default,
 655   after_open_default,
 656   after_allocation_default,
 657   set_output_arch_default,
 658   ldemul_default_target,
 659   gld${EMULATION_NAME}_before_allocation,
 660   gld${EMULATION_NAME}_get_script,
 661   "${EMULATION_NAME}",
 662   "${OUTPUT_FORMAT}",
 663   0,    /* finish */
 664   0,    /* create_output_section_statements */
 665   0,    /* open_dynamic_archive */
 666   0,    /* place_orphan */
 667   0,    /* set_symbols */
 668   gld${EMULATION_NAME}_parse_args,
 669 };
 670 EOF