1 # This shell script emits a C file. -*- C -*- 2 # It does some substitutions. 3 fragment <<EOF 4 /* This file is is generated by a shell script. DO NOT EDIT! */ 5 6 /* Handle embedded relocs for m68k. 7 Copyright (C) 2000-2014 Free Software Foundation, Inc. 8 Written by Michael Sokolov <msokolov (a] ivan.Harhan.ORG>, based on generic.em 9 by Steve Chamberlain <steve (a] cygnus.com>, embedded relocs code based on 10 mipsecoff.em by Ian Lance Taylor <ian (a] cygnus.com> (now removed). 11 12 This file is part of the GNU Binutils. 13 14 This program is free software; you can redistribute it and/or modify 15 it under the terms of the GNU General Public License as published by 16 the Free Software Foundation; either version 3 of the License, or 17 (at your option) any later version. 18 19 This program is distributed in the hope that it will be useful, 20 but WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 GNU General Public License for more details. 23 24 You should have received a copy of the GNU General Public License 25 along with this program; if not, write to the Free Software 26 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 27 MA 02110-1301, USA. */ 28 29 #define TARGET_IS_${EMULATION_NAME} 30 31 #include "sysdep.h" 32 #include "bfd.h" 33 #include "bfdlink.h" 34 35 #include "ld.h" 36 #include "ldmain.h" 37 #include "ldexp.h" 38 #include "ldlang.h" 39 #include "ldfile.h" 40 #include "ldemul.h" 41 #include "ldmisc.h" 42 43 static void check_sections (bfd *, asection *, void *); 44 45 static void 46 gld${EMULATION_NAME}_before_parse (void) 47 { 48 #ifndef TARGET_ /* I.e., if not generic. */ 49 ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); 50 #endif /* not TARGET_ */ 51 } 52 53 /* This function is run after all the input files have been opened. 54 We create a .emreloc section for each input file with a non zero 55 .data section. The BFD backend will fill in these sections with 56 magic numbers which can be used to relocate the data section at run 57 time. */ 58 59 static void 60 gld${EMULATION_NAME}_after_open (void) 61 { 62 bfd *abfd; 63 64 after_open_default (); 65 66 if (! command_line.embedded_relocs 67 || link_info.relocatable) 68 return; 69 70 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) 71 { 72 asection *datasec; 73 74 /* As first-order business, make sure that each input BFD is COFF. It 75 better be, as we are directly calling a COFF backend function. */ 76 if (bfd_get_flavour (abfd) != bfd_target_coff_flavour) 77 einfo ("%F%B: all input objects must be COFF for --embedded-relocs\n"); 78 79 datasec = bfd_get_section_by_name (abfd, ".data"); 80 81 /* Note that we assume that the reloc_count field has already 82 been set up. We could call bfd_get_reloc_upper_bound, but 83 that returns the size of a memory buffer rather than a reloc 84 count. We do not want to call bfd_canonicalize_reloc, 85 because although it would always work it would force us to 86 read in the relocs into BFD canonical form, which would waste 87 a significant amount of time and memory. */ 88 if (datasec != NULL && datasec->reloc_count > 0) 89 { 90 asection *relsec; 91 92 relsec = bfd_make_section_with_flags (abfd, ".emreloc", 93 (SEC_ALLOC 94 | SEC_LOAD 95 | SEC_HAS_CONTENTS 96 | SEC_IN_MEMORY)); 97 if (relsec == NULL 98 || ! bfd_set_section_alignment (abfd, relsec, 2) 99 || ! bfd_set_section_size (abfd, relsec, 100 datasec->reloc_count * 12)) 101 einfo ("%F%B: can not create .emreloc section: %E\n"); 102 } 103 104 /* Double check that all other data sections are empty, as is 105 required for embedded PIC code. */ 106 bfd_map_over_sections (abfd, check_sections, datasec); 107 } 108 } 109 110 /* Check that of the data sections, only the .data section has 111 relocs. This is called via bfd_map_over_sections. */ 112 113 static void 114 check_sections (bfd *abfd, asection *sec, void *datasec) 115 { 116 if ((bfd_get_section_flags (abfd, sec) & SEC_DATA) 117 && sec != datasec 118 && sec->reloc_count != 0) 119 einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n", 120 abfd, bfd_get_section_name (abfd, sec)); 121 } 122 123 /* This function is called after the section sizes and offsets have 124 been set. If we are generating embedded relocs, it calls a special 125 BFD backend routine to do the work. */ 126 127 static void 128 gld${EMULATION_NAME}_after_allocation (void) 129 { 130 bfd *abfd; 131 132 if (! command_line.embedded_relocs 133 || link_info.relocatable) 134 return; 135 136 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) 137 { 138 asection *datasec, *relsec; 139 char *errmsg; 140 141 datasec = bfd_get_section_by_name (abfd, ".data"); 142 143 if (datasec == NULL || datasec->reloc_count == 0) 144 continue; 145 146 relsec = bfd_get_section_by_name (abfd, ".emreloc"); 147 ASSERT (relsec != NULL); 148 149 if (! bfd_m68k_coff_create_embedded_relocs (abfd, &link_info, 150 datasec, relsec, 151 &errmsg)) 152 { 153 if (errmsg == NULL) 154 einfo ("%B%X: can not create runtime reloc information: %E\n", 155 abfd); 156 else 157 einfo ("%X%B: can not create runtime reloc information: %s\n", 158 abfd, errmsg); 159 } 160 } 161 } 162 163 static char * 164 gld${EMULATION_NAME}_get_script (int *isfile) 165 EOF 166 167 if test x"$COMPILE_IN" = xyes 168 then 169 # Scripts compiled in. 170 171 # sed commands to quote an ld script as a C string. 172 sc="-f stringify.sed" 173 174 fragment <<EOF 175 { 176 *isfile = 0; 177 178 if (link_info.relocatable && config.build_constructors) 179 return 180 EOF 181 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c 182 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c 183 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c 184 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c 185 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c 186 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c 187 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c 188 echo ' ; else return' >> e${EMULATION_NAME}.c 189 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c 190 echo '; }' >> e${EMULATION_NAME}.c 191 192 else 193 # Scripts read from the filesystem. 194 195 fragment <<EOF 196 { 197 *isfile = 1; 198 199 if (link_info.relocatable && config.build_constructors) 200 return "ldscripts/${EMULATION_NAME}.xu"; 201 else if (link_info.relocatable) 202 return "ldscripts/${EMULATION_NAME}.xr"; 203 else if (!config.text_read_only) 204 return "ldscripts/${EMULATION_NAME}.xbn"; 205 else if (!config.magic_demand_paged) 206 return "ldscripts/${EMULATION_NAME}.xn"; 207 else 208 return "ldscripts/${EMULATION_NAME}.x"; 209 } 210 EOF 211 212 fi 213 214 fragment <<EOF 215 216 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 217 { 218 gld${EMULATION_NAME}_before_parse, 219 syslib_default, 220 hll_default, 221 after_parse_default, 222 gld${EMULATION_NAME}_after_open, 223 gld${EMULATION_NAME}_after_allocation, 224 set_output_arch_default, 225 ldemul_default_target, 226 before_allocation_default, 227 gld${EMULATION_NAME}_get_script, 228 "${EMULATION_NAME}", 229 "${OUTPUT_FORMAT}", 230 finish_default, 231 NULL, /* create output section statements */ 232 NULL, /* open dynamic archive */ 233 NULL, /* place orphan */ 234 NULL, /* set symbols */ 235 NULL, /* parse args */ 236 NULL, /* add_options */ 237 NULL, /* handle_option */ 238 NULL, /* unrecognized file */ 239 NULL, /* list options */ 240 NULL, /* recognized file */ 241 NULL, /* find_potential_libraries */ 242 NULL, /* new_vers_pattern */ 243 NULL /* extra_map_file_text */ 244 }; 245 EOF 246
