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      1 # This shell script emits a C file. -*- C -*-
      2 #   Copyright (C) 2006-2025 Free Software Foundation, Inc.
      3 #
      4 # This file is part of the GNU Binutils.
      5 #
      6 # This program is free software; you can redistribute it and/or modify
      7 # it under the terms of the GNU General Public License as published by
      8 # the Free Software Foundation; either version 3 of the License, or
      9 # (at your option) any later version.
     10 #
     11 # This program is distributed in the hope that it will be useful,
     12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14 # GNU General Public License for more details.
     15 #
     16 # You should have received a copy of the GNU General Public License
     17 # along with this program; if not, write to the Free Software
     18 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
     19 # MA 02110-1301, USA.
     20 
     21 fragment <<EOF
     22 
     23 /* --- \begin{pdp11.em} */
     24 #include "libiberty.h"
     25 #include "getopt.h"
     26 
     27 static void
     28 gld${EMULATION_NAME}_before_parse (void)
     29 {
     30   ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
     31   /* for PDP11 Unix compatibility, default to --omagic */
     32   config.magic_demand_paged = false;
     33   config.text_read_only = false;
     34 }
     35 
     36 /* PDP11 specific options.  */
     37 #define OPTION_IMAGIC 301
     38 
     39 static void
     40 gld${EMULATION_NAME}_add_options
     41   (int ns ATTRIBUTE_UNUSED,
     42    char **shortopts,
     43    int nl,
     44    struct option **longopts,
     45    int nrl ATTRIBUTE_UNUSED,
     46    struct option **really_longopts ATTRIBUTE_UNUSED)
     47 {
     48   static const char xtra_short[] = "z";
     49   static const struct option xtra_long[] =
     50   {
     51     {"imagic", no_argument, NULL, OPTION_IMAGIC},
     52     {NULL, no_argument, NULL, 0}
     53   };
     54 
     55   *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
     56   memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
     57   *longopts
     58     = xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long));
     59   memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
     60 }
     61 
     62 static void
     63 gld${EMULATION_NAME}_list_options (FILE *file)
     64 {
     65   fprintf (file, _("  -N, --omagic   Do not make text readonly, do not page align data (default)\n"));
     66   fprintf (file, _("  -n, --nmagic   Make text readonly, align data to next page\n"));
     67   fprintf (file, _("  -z, --imagic   Make text readonly, separate instruction and data spaces\n"));
     68   fprintf (file, _("  --no-omagic    Equivalent to --nmagic\n"));
     69 }
     70 
     71 static bool
     72 gld${EMULATION_NAME}_handle_option (int optc)
     73 {
     74   switch (optc)
     75     {
     76     default:
     77       return false;
     78 
     79     case 'z':
     80     case OPTION_IMAGIC:
     81       link_info.separate_code = 1;
     82       /* The --imagic format causes the .text and .data sections to occupy the
     83 	 same memory addresses in separate spaces, so don't check overlap. */
     84       command_line.check_section_addresses = 0;
     85       break;
     86     }
     87 
     88   return true;
     89 }
     90 
     91 /* We need a special case to prepare an additional linker script for option
     92  * --imagic where the .data section starts at address 0 rather than directly
     93  * following the .text section or being aligned to the next page after the
     94  * .text section. */
     95 static char *
     96 gld${EMULATION_NAME}_get_script (int *isfile)
     97 EOF
     98 
     99 if test x"$COMPILE_IN" = xyes
    100 then
    101 # Scripts compiled in.
    102 
    103 # sed commands to quote an ld script as a C string.
    104 sc="-f ${srcdir}/emultempl/stringify.sed"
    105 
    106 fragment <<EOF
    107 {
    108   *isfile = 0;
    109 
    110   if (bfd_link_relocatable (&link_info) && config.build_constructors)
    111     return
    112 EOF
    113 sed $sc ldscripts/${EMULATION_NAME}.xu			>> e${EMULATION_NAME}.c
    114 echo '  ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c
    115 sed $sc ldscripts/${EMULATION_NAME}.xr			>> e${EMULATION_NAME}.c
    116 echo '  ; else if (link_info.separate_code) return'	>> e${EMULATION_NAME}.c
    117 sed $sc ldscripts/${EMULATION_NAME}.xe			>> e${EMULATION_NAME}.c
    118 echo '  ; else if (!config.text_read_only) return'	>> e${EMULATION_NAME}.c
    119 sed $sc ldscripts/${EMULATION_NAME}.xbn			>> e${EMULATION_NAME}.c
    120 echo '  ; else if (!config.magic_demand_paged) return'	>> e${EMULATION_NAME}.c
    121 sed $sc ldscripts/${EMULATION_NAME}.xn			>> e${EMULATION_NAME}.c
    122 echo '  ; else return'					>> e${EMULATION_NAME}.c
    123 sed $sc ldscripts/${EMULATION_NAME}.x			>> e${EMULATION_NAME}.c
    124 echo '; }'						>> e${EMULATION_NAME}.c
    125 
    126 else
    127 # Scripts read from the filesystem.
    128 
    129 fragment <<EOF
    130 {
    131   *isfile = 1;
    132 
    133   if (bfd_link_relocatable (&link_info) && config.build_constructors)
    134     return "ldscripts/${EMULATION_NAME}.xu";
    135   else if (bfd_link_relocatable (&link_info))
    136     return "ldscripts/${EMULATION_NAME}.xr";
    137   else if (link_info.separate_code)
    138     return "ldscripts/${EMULATION_NAME}.xe";
    139   else if (!config.text_read_only)
    140     return "ldscripts/${EMULATION_NAME}.xbn";
    141   else if (!config.magic_demand_paged)
    142     return "ldscripts/${EMULATION_NAME}.xn";
    143   else
    144     return "ldscripts/${EMULATION_NAME}.x";
    145 }
    146 EOF
    147 fi
    148 
    149 fragment <<EOF
    150 
    151 /* --- \end{pdp11.em} */
    152 
    153 EOF
    154 
    155 LDEMUL_BEFORE_PARSE=gld"$EMULATION_NAME"_before_parse
    156 LDEMUL_ADD_OPTIONS=gld"$EMULATION_NAME"_add_options
    157 LDEMUL_HANDLE_OPTION=gld"$EMULATION_NAME"_handle_option
    158 LDEMUL_LIST_OPTIONS=gld"$EMULATION_NAME"_list_options
    159 LDEMUL_GET_SCRIPT=gld"$EMULATION_NAME"_get_script
    160