1 # This shell script emits a C file. -*- C -*- 2 # It does some substitutions. 3 if [ -z "$MACHINE" ]; then 4 OUTPUT_ARCH=${ARCH} 5 else 6 OUTPUT_ARCH=${ARCH}:${MACHINE} 7 fi 8 fragment <<EOF 9 /* This file is is generated by a shell script. DO NOT EDIT! */ 10 11 /* Linux a.out emulation code for ${EMULATION_NAME} 12 Copyright (C) 1991-2014 Free Software Foundation, Inc. 13 Written by Steve Chamberlain <sac (a] cygnus.com> 14 Linux support by Eric Youngdale <ericy (a] cais.cais.com> 15 16 This file is part of the GNU Binutils. 17 18 This program is free software; you can redistribute it and/or modify 19 it under the terms of the GNU General Public License as published by 20 the Free Software Foundation; either version 3 of the License, or 21 (at your option) any later version. 22 23 This program is distributed in the hope that it will be useful, 24 but WITHOUT ANY WARRANTY; without even the implied warranty of 25 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 26 GNU General Public License for more details. 27 28 You should have received a copy of the GNU General Public License 29 along with this program; if not, write to the Free Software 30 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 31 MA 02110-1301, USA. */ 32 33 #define TARGET_IS_${EMULATION_NAME} 34 35 #include "sysdep.h" 36 #include "bfd.h" 37 #include "bfdlink.h" 38 39 #include "ld.h" 40 #include "ldmain.h" 41 #include "ldmisc.h" 42 #include "ldexp.h" 43 #include "ldlang.h" 44 #include "ldfile.h" 45 #include "ldemul.h" 46 47 static void 48 gld${EMULATION_NAME}_before_parse (void) 49 { 50 ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`); 51 input_flags.dynamic = TRUE; 52 config.has_shared = TRUE; 53 } 54 55 /* Try to open a dynamic archive. This is where we know that Linux 56 dynamic libraries have an extension of .sa. */ 57 58 static bfd_boolean 59 gld${EMULATION_NAME}_open_dynamic_archive 60 (const char *arch, search_dirs_type *search, lang_input_statement_type *entry) 61 { 62 char *string; 63 64 if (! entry->flags.maybe_archive || entry->flags.full_name_provided) 65 return FALSE; 66 67 string = (char *) xmalloc (strlen (search->name) 68 + strlen (entry->filename) 69 + strlen (arch) 70 + sizeof "/lib.sa"); 71 72 sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch); 73 74 if (! ldfile_try_open_bfd (string, entry)) 75 { 76 free (string); 77 return FALSE; 78 } 79 80 entry->filename = string; 81 82 return TRUE; 83 } 84 85 /* This is called by the create_output_section_statements routine via 86 lang_for_each_statement. It locates any address assignment to 87 .text, and modifies it to include the size of the headers. This 88 causes -Ttext to mean the starting address of the header, rather 89 than the starting address of .text, which is compatible with other 90 Linux tools. */ 91 92 static void 93 gld${EMULATION_NAME}_find_address_statement (lang_statement_union_type *s) 94 { 95 if (s->header.type == lang_address_statement_enum 96 && strcmp (s->address_statement.section_name, ".text") == 0) 97 { 98 ASSERT (s->address_statement.address->type.node_class == etree_value); 99 s->address_statement.address->value.value += 0x20; 100 } 101 } 102 103 /* This is called before opening the input BFD's. */ 104 105 static void 106 gld${EMULATION_NAME}_create_output_section_statements (void) 107 { 108 lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement); 109 } 110 111 /* This is called after the sections have been attached to output 112 sections, but before any sizes or addresses have been set. */ 113 114 static void 115 gld${EMULATION_NAME}_before_allocation (void) 116 { 117 if (link_info.relocatable) 118 return; 119 120 /* Let the backend work out the sizes of any sections required by 121 dynamic linking. */ 122 if (! bfd_${EMULATION_NAME}_size_dynamic_sections (link_info.output_bfd, 123 &link_info)) 124 einfo ("%P%F: failed to set dynamic section sizes: %E\n"); 125 126 before_allocation_default (); 127 } 128 129 static char * 130 gld${EMULATION_NAME}_get_script (int *isfile) 131 EOF 132 133 if test x"$COMPILE_IN" = xyes 134 then 135 # Scripts compiled in. 136 137 # sed commands to quote an ld script as a C string. 138 sc="-f stringify.sed" 139 140 fragment <<EOF 141 { 142 *isfile = 0; 143 144 if (link_info.relocatable && config.build_constructors) 145 return 146 EOF 147 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c 148 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c 149 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c 150 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c 151 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c 152 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c 153 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c 154 echo ' ; else return' >> e${EMULATION_NAME}.c 155 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c 156 echo '; }' >> e${EMULATION_NAME}.c 157 158 else 159 # Scripts read from the filesystem. 160 161 fragment <<EOF 162 { 163 *isfile = 1; 164 165 if (link_info.relocatable && config.build_constructors) 166 return "ldscripts/${EMULATION_NAME}.xu"; 167 else if (link_info.relocatable) 168 return "ldscripts/${EMULATION_NAME}.xr"; 169 else if (!config.text_read_only) 170 return "ldscripts/${EMULATION_NAME}.xbn"; 171 else if (!config.magic_demand_paged) 172 return "ldscripts/${EMULATION_NAME}.xn"; 173 else 174 return "ldscripts/${EMULATION_NAME}.x"; 175 } 176 EOF 177 178 fi 179 180 fragment <<EOF 181 182 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 183 { 184 gld${EMULATION_NAME}_before_parse, 185 syslib_default, 186 hll_default, 187 after_parse_default, 188 after_open_default, 189 after_allocation_default, 190 set_output_arch_default, 191 ldemul_default_target, 192 gld${EMULATION_NAME}_before_allocation, 193 gld${EMULATION_NAME}_get_script, 194 "${EMULATION_NAME}", 195 "${OUTPUT_FORMAT}", 196 finish_default, 197 gld${EMULATION_NAME}_create_output_section_statements, 198 gld${EMULATION_NAME}_open_dynamic_archive, 199 NULL, /* place orphan */ 200 NULL, /* set symbols */ 201 NULL, /* parse args */ 202 NULL, /* add_options */ 203 NULL, /* handle_option */ 204 NULL, /* unrecognized file */ 205 NULL, /* list options */ 206 NULL, /* recognized file */ 207 NULL, /* find_potential_libraries */ 208 NULL, /* new_vers_pattern */ 209 NULL /* extra_map_file_text */ 210 }; 211 EOF 212
