1# This shell script emits a C file. -*- C -*- 2# It does some substitutions. 3cat >e${EMULATION_NAME}.c <<EOF 4/* This file is is generated by a shell script. DO NOT EDIT! */ 5 6/* emulate the original gld for the given ${EMULATION_NAME} 7 Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 8 2004, 2005, 2007 Free Software Foundation, Inc. 9 Written by Steve Chamberlain steve@cygnus.com 10 11This file is part of GLD, the Gnu Linker. 12 13This program is free software; you can redistribute it and/or modify 14it under the terms of the GNU General Public License as published by 15the Free Software Foundation; either version 2 of the License, or 16(at your option) any later version. 17 18This program is distributed in the hope that it will be useful, 19but WITHOUT ANY WARRANTY; without even the implied warranty of 20MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21GNU General Public License for more details. 22 23You should have received a copy of the GNU General Public License 24along with this program; if not, write to the Free Software 25Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 26 27#define TARGET_IS_${EMULATION_NAME} 28 29#include "sysdep.h" 30#include "bfd.h" 31#include "bfdlink.h" 32#include "getopt.h" 33 34#include "ld.h" 35#include "ldmain.h" 36#include "ldmisc.h" 37 38#include "ldexp.h" 39#include "ldlang.h" 40#include "ldfile.h" 41#include "ldemul.h" 42 43/* If TRUE, then interworking stubs which support calls to old, 44 non-interworking aware ARM code should be generated. */ 45 46static int support_old_code = 0; 47static char * thumb_entry_symbol = NULL; 48 49#define OPTION_SUPPORT_OLD_CODE 300 50#define OPTION_THUMB_ENTRY 301 51 52static void 53gld${EMULATION_NAME}_add_options 54 (int ns ATTRIBUTE_UNUSED, char **shortopts ATTRIBUTE_UNUSED, int nl, 55 struct option **longopts, int nrl ATTRIBUTE_UNUSED, 56 struct option **really_longopts ATTRIBUTE_UNUSED) 57{ 58 static const struct option xtra_long[] = { 59 {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE}, 60 {"thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, 61 {NULL, no_argument, NULL, 0} 62 }; 63 64 *longopts = xrealloc (*longopts, 65 nl * sizeof (struct option) + sizeof (xtra_long)); 66 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long)); 67} 68 69static void 70gld${EMULATION_NAME}_list_options (FILE *file) 71{ 72 fprintf (file, _(" --support-old-code Support interworking with old code\n")); 73 fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); 74} 75 76static bfd_boolean 77gld${EMULATION_NAME}_handle_option (int optc) 78{ 79 switch (optc) 80 { 81 default: 82 return FALSE; 83 84 case OPTION_SUPPORT_OLD_CODE: 85 support_old_code = 1; 86 break; 87 88 case OPTION_THUMB_ENTRY: 89 thumb_entry_symbol = optarg; 90 break; 91 } 92 93 return TRUE; 94} 95 96static void 97gld${EMULATION_NAME}_before_parse (void) 98{ 99#ifndef TARGET_ /* I.e., if not generic. */ 100 ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); 101#endif /* not TARGET_ */ 102} 103 104/* This is called after the sections have been attached to output 105 sections, but before any sizes or addresses have been set. */ 106 107static void 108gld${EMULATION_NAME}_before_allocation (void) 109{ 110 /* we should be able to set the size of the interworking stub section */ 111 112 /* Here we rummage through the found bfds to collect glue information */ 113 /* FIXME: should this be based on a command line option? krk@cygnus.com */ 114 { 115 LANG_FOR_EACH_INPUT_STATEMENT (is) 116 { 117 if (! bfd_arm_process_before_allocation 118 (is->the_bfd, & link_info, support_old_code)) 119 { 120 /* xgettext:c-format */ 121 einfo (_("Errors encountered processing file %s"), is->filename); 122 } 123 } 124 } 125 126 /* We have seen it all. Allocate it, and carry on */ 127 bfd_arm_allocate_interworking_sections (& link_info); 128 129 before_allocation_default (); 130} 131 132static void 133gld${EMULATION_NAME}_after_open (void) 134{ 135 if (strstr (bfd_get_target (output_bfd), "arm") == NULL) 136 { 137 /* The arm backend needs special fields in the output hash structure. 138 These will only be created if the output format is an arm format, 139 hence we do not support linking and changing output formats at the 140 same time. Use a link followed by objcopy to change output formats. */ 141 einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n"); 142 return; 143 } 144 145 { 146 LANG_FOR_EACH_INPUT_STATEMENT (is) 147 { 148 if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info)) 149 break; 150 } 151 } 152} 153 154static void 155gld${EMULATION_NAME}_finish (void) 156{ 157 if (thumb_entry_symbol != NULL) 158 { 159 struct bfd_link_hash_entry * h; 160 161 h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, 162 FALSE, FALSE, TRUE); 163 164 if (h != (struct bfd_link_hash_entry *) NULL 165 && (h->type == bfd_link_hash_defined 166 || h->type == bfd_link_hash_defweak) 167 && h->u.def.section->output_section != NULL) 168 { 169 static char buffer[32]; 170 bfd_vma val; 171 172 /* Special procesing is required for a Thumb entry symbol. The 173 bottom bit of its address must be set. */ 174 val = (h->u.def.value 175 + bfd_get_section_vma (output_bfd, 176 h->u.def.section->output_section) 177 + h->u.def.section->output_offset); 178 179 val |= 1; 180 181 /* Now convert this value into a string and store it in entry_symbol 182 where the lang_finish() function will pick it up. */ 183 buffer[0] = '0'; 184 buffer[1] = 'x'; 185 186 sprintf_vma (buffer + 2, val); 187 188 if (entry_symbol.name != NULL && entry_from_cmdline) 189 einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), 190 thumb_entry_symbol, entry_symbol.name); 191 entry_symbol.name = buffer; 192 } 193 else 194 einfo (_("%P: warning: connot find thumb start symbol %s\n"), 195 thumb_entry_symbol); 196 } 197 198 finish_default (); 199} 200 201static char * 202gld${EMULATION_NAME}_get_script (int *isfile) 203EOF 204 205if test -n "$COMPILE_IN" 206then 207# Scripts compiled in. 208 209# sed commands to quote an ld script as a C string. 210sc="-f stringify.sed" 211 212cat >>e${EMULATION_NAME}.c <<EOF 213{ 214 *isfile = 0; 215 216 if (link_info.relocatable && config.build_constructors) 217 return 218EOF 219sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c 220echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c 221sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c 222echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c 223sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c 224echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c 225sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c 226echo ' ; else return' >> e${EMULATION_NAME}.c 227sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c 228echo '; }' >> e${EMULATION_NAME}.c 229 230else 231# Scripts read from the filesystem. 232 233cat >>e${EMULATION_NAME}.c <<EOF 234{ 235 *isfile = 1; 236 237 if (link_info.relocatable && config.build_constructors) 238 return "ldscripts/${EMULATION_NAME}.xu"; 239 else if (link_info.relocatable) 240 return "ldscripts/${EMULATION_NAME}.xr"; 241 else if (!config.text_read_only) 242 return "ldscripts/${EMULATION_NAME}.xbn"; 243 else if (!config.magic_demand_paged) 244 return "ldscripts/${EMULATION_NAME}.xn"; 245 else 246 return "ldscripts/${EMULATION_NAME}.x"; 247} 248EOF 249 250fi 251 252cat >>e${EMULATION_NAME}.c <<EOF 253 254struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 255{ 256 gld${EMULATION_NAME}_before_parse, 257 syslib_default, 258 hll_default, 259 after_parse_default, 260 gld${EMULATION_NAME}_after_open, 261 after_allocation_default, 262 set_output_arch_default, 263 ldemul_default_target, 264 gld${EMULATION_NAME}_before_allocation, 265 gld${EMULATION_NAME}_get_script, 266 "${EMULATION_NAME}", 267 "${OUTPUT_FORMAT}", 268 gld${EMULATION_NAME}_finish, 269 NULL, /* create output section statements */ 270 NULL, /* open dynamic archive */ 271 NULL, /* place orphan */ 272 NULL, /* set symbols */ 273 NULL, /* parse_args */ 274 gld${EMULATION_NAME}_add_options, 275 gld${EMULATION_NAME}_handle_option, 276 NULL, /* unrecognised file */ 277 gld${EMULATION_NAME}_list_options, 278 NULL, /* recognized file */ 279 NULL, /* find_potential_libraries */ 280 NULL /* new_vers_pattern */ 281}; 282EOF 283