| 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 | /* Emulate the original gld for the given ${EMULATION_NAME} |
| 7 | Copyright (C) 2014-2015 Free Software Foundation, Inc. |
| 8 | Written by Steve Chamberlain steve@cygnus.com |
| 9 | Extended for the MSP430 by Nick Clifton nickc@redhat.com |
| 10 | |
| 11 | This file is part of the GNU Binutils. |
| 12 | |
| 13 | This program is free software; you can redistribute it and/or modify |
| 14 | it under the terms of the GNU General Public License as published by |
| 15 | the Free Software Foundation; either version 3 of the License, or |
| 16 | (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, |
| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | GNU General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 26 | MA 02110-1301, USA. */ |
| 27 | |
| 28 | #define TARGET_IS_${EMULATION_NAME} |
| 29 | |
| 30 | #include "sysdep.h" |
| 31 | #include "bfd.h" |
| 32 | #include "bfdlink.h" |
| 33 | |
| 34 | #include "ld.h" |
| 35 | #include "ldmain.h" |
| 36 | #include "ldmisc.h" |
| 37 | #include "ldexp.h" |
| 38 | #include "ldlang.h" |
| 39 | #include "ldfile.h" |
| 40 | #include "ldemul.h" |
| 41 | #include "libiberty.h" |
| 42 | |
| 43 | EOF |
| 44 | |
| 45 | # Import any needed special functions and/or overrides. |
| 46 | # |
| 47 | if test -n "$EXTRA_EM_FILE" ; then |
| 48 | source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em |
| 49 | fi |
| 50 | |
| 51 | if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then |
| 52 | fragment <<EOF |
| 53 | |
| 54 | static void |
| 55 | gld${EMULATION_NAME}_before_parse (void) |
| 56 | { |
| 57 | #ifndef TARGET_ /* I.e., if not generic. */ |
| 58 | ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); |
| 59 | #endif /* not TARGET_ */ |
| 60 | |
| 61 | /* The MSP430 port *needs* linker relaxtion in order to cope with large |
| 62 | functions where conditional branches do not fit into a +/- 1024 byte range. */ |
| 63 | if (! link_info.relocatable) |
| 64 | TARGET_ENABLE_RELAXATION; |
| 65 | } |
| 66 | |
| 67 | EOF |
| 68 | fi |
| 69 | |
| 70 | if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then |
| 71 | fragment <<EOF |
| 72 | |
| 73 | static char * |
| 74 | gld${EMULATION_NAME}_get_script (int *isfile) |
| 75 | EOF |
| 76 | |
| 77 | if test x"$COMPILE_IN" = xyes |
| 78 | then |
| 79 | # Scripts compiled in. |
| 80 | |
| 81 | # sed commands to quote an ld script as a C string. |
| 82 | sc="-f stringify.sed" |
| 83 | |
| 84 | fragment <<EOF |
| 85 | { |
| 86 | *isfile = 0; |
| 87 | |
| 88 | if (link_info.relocatable && config.build_constructors) |
| 89 | return |
| 90 | EOF |
| 91 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c |
| 92 | echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c |
| 93 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c |
| 94 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c |
| 95 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c |
| 96 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c |
| 97 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c |
| 98 | echo ' ; else return' >> e${EMULATION_NAME}.c |
| 99 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c |
| 100 | echo '; }' >> e${EMULATION_NAME}.c |
| 101 | |
| 102 | else |
| 103 | # Scripts read from the filesystem. |
| 104 | |
| 105 | fragment <<EOF |
| 106 | { |
| 107 | *isfile = 1; |
| 108 | |
| 109 | if (link_info.relocatable && config.build_constructors) |
| 110 | return "ldscripts/${EMULATION_NAME}.xu"; |
| 111 | else if (link_info.relocatable) |
| 112 | return "ldscripts/${EMULATION_NAME}.xr"; |
| 113 | else if (!config.text_read_only) |
| 114 | return "ldscripts/${EMULATION_NAME}.xbn"; |
| 115 | else if (!config.magic_demand_paged) |
| 116 | return "ldscripts/${EMULATION_NAME}.xn"; |
| 117 | else |
| 118 | return "ldscripts/${EMULATION_NAME}.x"; |
| 119 | } |
| 120 | EOF |
| 121 | fi |
| 122 | fi |
| 123 | |
| 124 | if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then |
| 125 | fragment <<EOF |
| 126 | |
| 127 | /* Helper function for place_orphan that computes the size |
| 128 | of sections already mapped to the given statement. */ |
| 129 | |
| 130 | static bfd_size_type |
| 131 | scan_children (lang_statement_union_type * l) |
| 132 | { |
| 133 | bfd_size_type amount = 0; |
| 134 | |
| 135 | while (l != NULL) |
| 136 | { |
| 137 | switch (l->header.type) |
| 138 | { |
| 139 | case lang_input_section_enum: |
| 140 | if (l->input_section.section->flags & SEC_ALLOC) |
| 141 | amount += l->input_section.section->size; |
| 142 | break; |
| 143 | |
| 144 | case lang_constructors_statement_enum: |
| 145 | case lang_assignment_statement_enum: |
| 146 | break; |
| 147 | |
| 148 | case lang_wild_statement_enum: |
| 149 | amount += scan_children (l->wild_statement.children.head); |
| 150 | break; |
| 151 | |
| 152 | default: |
| 153 | fprintf (stderr, "msp430 orphan placer: unhandled lang type %d\n", l->header.type); |
| 154 | break; |
| 155 | } |
| 156 | |
| 157 | l = l->header.next; |
| 158 | } |
| 159 | |
| 160 | return amount; |
| 161 | } |
| 162 | |
| 163 | /* Place an orphan section. We use this to put .either sections |
| 164 | into either their lower or their upper equivalents. */ |
| 165 | |
| 166 | static lang_output_section_statement_type * |
| 167 | gld${EMULATION_NAME}_place_orphan (asection * s, |
| 168 | const char * secname, |
| 169 | int constraint) |
| 170 | { |
| 171 | char * lower_name; |
| 172 | char * upper_name; |
| 173 | char * name; |
| 174 | lang_output_section_statement_type * lower; |
| 175 | lang_output_section_statement_type * upper; |
| 176 | lang_output_section_statement_type * os; |
| 177 | |
| 178 | if ((s->flags & SEC_ALLOC) == 0) |
| 179 | return NULL; |
| 180 | |
| 181 | if (link_info.relocatable) |
| 182 | return NULL; |
| 183 | |
| 184 | /* If constraints are involved let the linker handle the placement normally. */ |
| 185 | if (constraint != 0) |
| 186 | return NULL; |
| 187 | |
| 188 | /* We only need special handling for .either sections. */ |
| 189 | if (strncmp (secname, ".either.", 8) != 0) |
| 190 | return NULL; |
| 191 | |
| 192 | /* Skip the .either prefix. */ |
| 193 | secname += 7; |
| 194 | |
| 195 | /* Compute the names of the corresponding upper and lower |
| 196 | sections. If the input section name contains another period, |
| 197 | only use the part of the name before the second dot. */ |
| 198 | if (strchr (secname + 1, '.') != NULL) |
| 199 | { |
| 200 | name = ACONCAT ((secname, NULL)); |
| 201 | |
| 202 | * strchr (name + 1, '.') = 0; |
| 203 | } |
| 204 | else |
| 205 | name = (char *) secname; |
| 206 | |
| 207 | lower_name = ACONCAT ((".lower", name, NULL)); |
| 208 | upper_name = ACONCAT ((".upper", name, NULL)); |
| 209 | |
| 210 | /* Find the corresponding lower and upper sections. */ |
| 211 | lower = lang_output_section_find (lower_name); |
| 212 | upper = lang_output_section_find (upper_name); |
| 213 | /* If the upper section does not exist, try again without the suffix. */ |
| 214 | if (upper == NULL) |
| 215 | upper = lang_output_section_find (name); |
| 216 | |
| 217 | if (lower == NULL) |
| 218 | { |
| 219 | os = upper; |
| 220 | if (upper == NULL) |
| 221 | { |
| 222 | einfo ("%P: error: no section named %s or %s in linker script\n", lower_name, upper_name); |
| 223 | return NULL; |
| 224 | } |
| 225 | } |
| 226 | else if (upper == NULL) |
| 227 | os = lower; |
| 228 | else if (lower->region == NULL) |
| 229 | os = lower; |
| 230 | /* If the section is too big for the region containing |
| 231 | the lower section then do not even try to use it. */ |
| 232 | else if (lower->region->length < s->size) |
| 233 | os = upper; |
| 234 | else |
| 235 | { |
| 236 | bfd_size_type amount = 0; |
| 237 | struct lang_output_section_statement_struct * p; |
| 238 | |
| 239 | amount += scan_children (lower->children.head); |
| 240 | |
| 241 | /* Also check forwards for other statements assigned to the same region. */ |
| 242 | for (p = lower->next; p != NULL; p = p->next) |
| 243 | if (p->region == lower->region) |
| 244 | amount += scan_children (p->children.head); |
| 245 | |
| 246 | /* Scan backwards as well. */ |
| 247 | for (p = lower->prev; p != NULL; p = p->prev) |
| 248 | if (p->region == lower->region) |
| 249 | amount += scan_children (p->children.head); |
| 250 | |
| 251 | if (amount + s->size >= lower->region->length) |
| 252 | os = upper; |
| 253 | else |
| 254 | os = lower; |
| 255 | } |
| 256 | |
| 257 | lang_add_section (& os->children, s, NULL, os); |
| 258 | return os; |
| 259 | } |
| 260 | EOF |
| 261 | fi |
| 262 | |
| 263 | fragment <<EOF |
| 264 | |
| 265 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = |
| 266 | { |
| 267 | ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse}, |
| 268 | ${LDEMUL_SYSLIB-syslib_default}, |
| 269 | ${LDEMUL_HLL-hll_default}, |
| 270 | ${LDEMUL_AFTER_PARSE-after_parse_default}, |
| 271 | ${LDEMUL_AFTER_OPEN-after_open_default}, |
| 272 | ${LDEMUL_AFTER_ALLOCATION-after_allocation_default}, |
| 273 | ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default}, |
| 274 | ${LDEMUL_CHOOSE_TARGET-ldemul_default_target}, |
| 275 | ${LDEMUL_BEFORE_ALLOCATION-before_allocation_default}, |
| 276 | ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script}, |
| 277 | "${EMULATION_NAME}", |
| 278 | "${OUTPUT_FORMAT}", |
| 279 | ${LDEMUL_FINISH-finish_default}, |
| 280 | ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL}, |
| 281 | ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-NULL}, |
| 282 | ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan}, |
| 283 | ${LDEMUL_SET_SYMBOLS-NULL}, |
| 284 | ${LDEMUL_PARSE_ARGS-NULL}, |
| 285 | ${LDEMUL_ADD_OPTIONS-NULL}, |
| 286 | ${LDEMUL_HANDLE_OPTION-NULL}, |
| 287 | ${LDEMUL_UNRECOGNIZED_FILE-NULL}, |
| 288 | ${LDEMUL_LIST_OPTIONS-NULL}, |
| 289 | ${LDEMUL_RECOGNIZED_FILE-NULL}, |
| 290 | ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL}, |
| 291 | ${LDEMUL_NEW_VERS_PATTERN-NULL}, |
| 292 | ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL} |
| 293 | }; |
| 294 | EOF |
| 295 | # \f |
| 296 | # Local Variables: |
| 297 | # mode: c |
| 298 | # End: |