ld/emultempl/linux.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 /* Linux a.out emulation code for ${EMULATION_NAME}
   7    Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
   8    Written by Steve Chamberlain <sac@cygnus.com>
   9    Linux support by Eric Youngdale <ericy@cais.cais.com>
  10
  11 This file is part of GLD, the Gnu Linker.
  12
  13 This program is free software; you can redistribute it and/or modify
  14 it under the terms of the GNU General Public License as published by
  15 the Free Software Foundation; either version 2 of the License, or
  16 (at your option) any later version.
  17
  18 This program is distributed in the hope that it will be useful,
  19 but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 GNU General Public License for more details.
  22
  23 You should have received a copy of the GNU General Public License
  24 along with this program; if not, write to the Free Software
  25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  26
  27 #define TARGET_IS_${EMULATION_NAME}
  28
  29 #include "bfd.h"
  30 #include "sysdep.h"
  31 #include "bfdlink.h"
  32
  33 #include "ld.h"
  34 #include "config.h"
  35 #include "ldmain.h"
  36 #include "ldemul.h"
  37 #include "ldfile.h"
  38 #include "ldmisc.h"
  39 #include "ldexp.h"
  40 #include "ldlang.h"
  41
  42 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
  43 static boolean gld${EMULATION_NAME}_open_dynamic_archive
  44   PARAMS ((const char *, lang_input_statement_type *));
  45 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
  46 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
  47
  48 static void
  49 gld${EMULATION_NAME}_before_parse()
  50 {
  51   ldfile_output_architecture = bfd_arch_${ARCH};
  52   config.dynamic_link = true;
  53 }
  54
  55 /* Try to open a dynamic archive.  This is where we know that Linux
  56    dynamic libraries have an extension of .sa.  */
  57
  58 static boolean
  59 gld${EMULATION_NAME}_open_dynamic_archive (arch, entry)
  60      const char *arch;
  61      lang_input_statement_type *entry;
  62 {
  63   return ldfile_open_file_search (arch, entry, "lib", ".sa");
  64 }
  65
  66 /* This is called after the sections have been attached to output
  67    sections, but before any sizes or addresses have been set.  */
  68
  69 static void
  70 gld${EMULATION_NAME}_before_allocation ()
  71 {
  72   if (link_info.relocateable)
  73     return;
  74
  75   /* Let the backend work out the sizes of any sections required by
  76      dynamic linking.  */
  77   if (! bfd_linux_size_dynamic_sections (output_bfd, &link_info))
  78     einfo ("%P%F: failed to set dynamic section sizes: %E\n");
  79 }
  80
  81 static char *
  82 gld${EMULATION_NAME}_get_script(isfile)
  83      int *isfile;
  84 EOF
  85
  86 if test -n "$COMPILE_IN"
  87 then
  88 # Scripts compiled in.
  89
  90 # sed commands to quote an ld script as a C string.
  91 sc='s/["\\]/\\&/g
  92 s/$/\\n\\/
  93 1s/^/"/
  94 $s/$/n"/
  95 '
  96
  97 cat >>e${EMULATION_NAME}.c <<EOF
  98 {
  99   *isfile = 0;
 100
 101   if (link_info.relocateable == true && config.build_constructors == true)
 102     return `sed "$sc" ldscripts/${EMULATION_NAME}.xu`;
 103   else if (link_info.relocateable == true)
 104     return `sed "$sc" ldscripts/${EMULATION_NAME}.xr`;
 105   else if (!config.text_read_only)
 106     return `sed "$sc" ldscripts/${EMULATION_NAME}.xbn`;
 107   else if (!config.magic_demand_paged)
 108     return `sed "$sc" ldscripts/${EMULATION_NAME}.xn`;
 109   else
 110     return `sed "$sc" ldscripts/${EMULATION_NAME}.x`;
 111 }
 112 EOF
 113
 114 else
 115 # Scripts read from the filesystem.
 116
 117 cat >>e${EMULATION_NAME}.c <<EOF
 118 {
 119   *isfile = 1;
 120
 121   if (link_info.relocateable == true && config.build_constructors == true)
 122     return "ldscripts/${EMULATION_NAME}.xu";
 123   else if (link_info.relocateable == true)
 124     return "ldscripts/${EMULATION_NAME}.xr";
 125   else if (!config.text_read_only)
 126     return "ldscripts/${EMULATION_NAME}.xbn";
 127   else if (!config.magic_demand_paged)
 128     return "ldscripts/${EMULATION_NAME}.xn";
 129   else
 130     return "ldscripts/${EMULATION_NAME}.x";
 131 }
 132 EOF
 133
 134 fi
 135
 136 cat >>e${EMULATION_NAME}.c <<EOF
 137
 138 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 139 {
 140   gld${EMULATION_NAME}_before_parse,
 141   syslib_default,
 142   hll_default,
 143   after_parse_default,
 144   after_allocation_default,
 145   set_output_arch_default,
 146   ldemul_default_target,
 147   gld${EMULATION_NAME}_before_allocation,
 148   gld${EMULATION_NAME}_get_script,
 149   "${EMULATION_NAME}",
 150   "${OUTPUT_FORMAT}",
 151   NULL,
 152   NULL,
 153   gld${EMULATION_NAME}_open_dynamic_archive
 154 };
 155 EOF