1 # Copyright (C) 2014 Free Software Foundation, Inc. 2 # 3 # Copying and distribution of this file, with or without modification, 4 # are permitted in any medium without royalty provided the copyright 5 # notice and this notice are preserved. 6 # 7 # Unusual variables checked by this code: 8 # NOP - four byte opcode for no-op (defaults to 0) 9 # DATA_ADDR - if end-of-text-plus-one-page isn't right for data start 10 # OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ... 11 # (e.g., .PARISC.global) 12 # OTHER_SECTIONS - at the end 13 # EXECUTABLE_SYMBOLS - symbols that must be defined for an 14 # executable (e.g., _DYNAMIC_LINK) 15 # TEXT_START_SYMBOLS - symbols that appear at the start of the 16 # .text section. 17 # DATA_START_SYMBOLS - symbols that appear at the start of the 18 # .data section. 19 # OTHER_BSS_SYMBOLS - symbols that appear at the start of the 20 # .bss section besides __bss_start. 21 # EMBEDDED - whether this is for an embedded system. 22 # 23 # When adding sections, do note that the names of some sections are used 24 # when specifying the start address of the next. 25 # 26 test -z "$ENTRY" && ENTRY=_start 27 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT} 28 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT} 29 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi 30 test "$LD_FLAG" = "N" && DATA_ADDR=. 31 32 CTOR=".ctors ${CONSTRUCTING-0} : 33 { 34 ${CONSTRUCTING+ PROVIDE (__CTOR_LIST__ = .); } 35 ${CONSTRUCTING+${CTOR_START}} 36 KEEP (*(.ctors)) 37 38 ${CONSTRUCTING+${CTOR_END}} 39 ${CONSTRUCTING+ PROVIDE(__CTOR_END__ = .); } 40 } ${RELOCATING+ > ${TEXT_MEMORY}}" 41 42 DTOR=" .dtors ${CONSTRUCTING-0} : 43 { 44 ${CONSTRUCTING+ PROVIDE(__DTOR_LIST__ = .); } 45 KEEP (*(.dtors)) 46 ${CONSTRUCTING+ PROVIDE(__DTOR_END__ = .); } 47 } ${RELOCATING+ > ${TEXT_MEMORY}}" 48 49 50 VECTORS=" 51 /* If the 'vectors_addr' symbol is defined, it indicates the start address 52 of interrupt vectors. This depends on the 68HC11 operating mode: 53 54 Addr 55 Single chip 0xffc0 56 Extended mode 0xffc0 57 Bootstrap 0x00c0 58 Test 0xbfc0 59 60 In general, the vectors address is 0xffc0. This can be overriden 61 with the '-defsym vectors_addr=0xbfc0' ld option. 62 63 Note: for the bootstrap mode, the interrupt vectors are at 0xbfc0 but 64 they are redirected to 0x00c0 by the internal PROM. Application's vectors 65 must also consist of jump instructions (see Motorola's manual). */ 66 67 PROVIDE (_vectors_addr = DEFINED (vectors_addr) ? vectors_addr : 0xffc0); 68 .vectors DEFINED (vectors_addr) ? vectors_addr : 0xffc0 : 69 { 70 KEEP (*(.vectors)) 71 }" 72 73 # 74 # We provide two emulations: a fixed on that defines some memory banks 75 # and a configurable one that includes a user provided memory definition. 76 # 77 case $GENERIC_BOARD in 78 yes|1|YES) 79 MEMORY_DEF=" 80 /* Get memory banks definition from some user configuration file. 81 This file must be located in some linker directory (search path 82 with -L<dir>). See fixed memory banks emulation script. */ 83 INCLUDE memory.x; 84 " 85 ;; 86 *) 87 MEMORY_DEF=" 88 /* Fixed definition of the available memory banks. 89 See generic emulation script for a user defined configuration. */ 90 MEMORY 91 { 92 page0 (rwx) : ORIGIN = 0x0, LENGTH = 256 93 text (rx) : ORIGIN = ${ROM_START_ADDR}, LENGTH = ${ROM_SIZE} 94 data : ORIGIN = ${RAM_START_ADDR}, LENGTH = ${RAM_SIZE} 95 eeprom : ORIGIN = ${EEPROM_START_ADDR}, LENGTH = ${EEPROM_SIZE} 96 } 97 98 /* Setup the stack on the top of the data memory bank. */ 99 PROVIDE (_stack = ${RAM_START_ADDR} + ${RAM_SIZE} - 1); 100 " 101 ;; 102 esac 103 104 STARTUP_CODE=" 105 /* Startup code. */ 106 KEEP (*(.install0)) /* Section should setup the stack pointer. */ 107 KEEP (*(.install1)) /* Place holder for applications. */ 108 KEEP (*(.install2)) /* Optional installation of data sections in RAM. */ 109 KEEP (*(.install3)) /* Place holder for applications. */ 110 KEEP (*(.install4)) /* Section that calls the main. */ 111 " 112 113 FINISH_CODE=" 114 /* Finish code. */ 115 KEEP (*(.fini0)) /* Beginning of finish code (_exit symbol). */ 116 KEEP (*(.fini1)) /* Place holder for applications. */ 117 KEEP (*(.fini2)) /* C++ destructors. */ 118 KEEP (*(.fini3)) /* Place holder for applications. */ 119 KEEP (*(.fini4)) /* Runtime exit. */ 120 " 121 122 PRE_COMPUTE_DATA_SIZE=" 123 /* SCz: this does not work yet... This is supposed to force the loading 124 of _map_data.o (from libgcc.a) when the .data section is not empty. 125 By doing so, this should bring the code that copies the .data section 126 from ROM to RAM at init time. 127 128 ___pre_comp_data_size = SIZEOF(.data); 129 __install_data_sections = ___pre_comp_data_size > 0 ? 130 __map_data_sections : 0; 131 */ 132 " 133 134 INSTALL_RELOC=" 135 .install0 0 : { *(.install0) } 136 .install1 0 : { *(.install1) } 137 .install2 0 : { *(.install2) } 138 .install3 0 : { *(.install3) } 139 .install4 0 : { *(.install4) } 140 " 141 142 FINISH_RELOC=" 143 .fini0 0 : { *(.fini0) } 144 .fini1 0 : { *(.fini1) } 145 .fini2 0 : { *(.fini2) } 146 .fini3 0 : { *(.fini3) } 147 .fini4 0 : { *(.fini4) } 148 " 149 150 BSS_DATA_RELOC=" 151 .data1 0 : { *(.data1) } 152 153 /* We want the small data sections together, so single-instruction offsets 154 can access them all, and initialized data all before uninitialized, so 155 we can shorten the on-disk segment size. */ 156 .sdata 0 : { *(.sdata) } 157 .sbss 0 : { *(.sbss) } 158 .scommon 0 : { *(.scommon) } 159 " 160 161 SOFT_REGS_RELOC=" 162 .softregs 0 : { *(.softregs) } 163 " 164 165 cat <<EOF 166 ${RELOCATING+/* Linker script for 68HC12 executable (PROM). */} 167 ${RELOCATING-/* Linker script for 68HC12 object file (ld -r). */} 168 169 /* Copyright (C) 2014 Free Software Foundation, Inc. 170 171 Copying and distribution of this script, with or without modification, 172 are permitted in any medium without royalty provided the copyright 173 notice and this notice are preserved. */ 174 175 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}", 176 "${LITTLE_OUTPUT_FORMAT}") 177 OUTPUT_ARCH(${OUTPUT_ARCH}) 178 ${RELOCATING+ENTRY(${ENTRY})} 179 180 ${RELOCATING+${LIB_SEARCH_DIRS}} 181 ${RELOCATING+${EXECUTABLE_SYMBOLS}} 182 ${RELOCATING+${MEMORY_DEF}} 183 184 SECTIONS 185 { 186 .hash ${RELOCATING-0} : { *(.hash) } 187 .dynsym ${RELOCATING-0} : { *(.dynsym) } 188 .dynstr ${RELOCATING-0} : { *(.dynstr) } 189 .gnu.version ${RELOCATING-0} : { *(.gnu.version) } 190 .gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d) } 191 .gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r) } 192 193 .rel.text ${RELOCATING-0} : 194 { 195 *(.rel.text) 196 ${RELOCATING+*(.rel.text.*)} 197 ${RELOCATING+*(.rel.gnu.linkonce.t.*)} 198 } 199 .rela.text ${RELOCATING-0} : 200 { 201 *(.rela.text) 202 ${RELOCATING+*(.rela.text.*)} 203 ${RELOCATING+*(.rela.gnu.linkonce.t.*)} 204 } 205 .rel.data ${RELOCATING-0} : 206 { 207 *(.rel.data) 208 ${RELOCATING+*(.rel.data.*)} 209 ${RELOCATING+*(.rel.gnu.linkonce.d.*)} 210 } 211 .rela.data ${RELOCATING-0} : 212 { 213 *(.rela.data) 214 ${RELOCATING+*(.rela.data.*)} 215 ${RELOCATING+*(.rela.gnu.linkonce.d.*)} 216 } 217 .rel.rodata ${RELOCATING-0} : 218 { 219 *(.rel.rodata) 220 ${RELOCATING+*(.rel.rodata.*)} 221 ${RELOCATING+*(.rel.gnu.linkonce.r.*)} 222 } 223 .rela.rodata ${RELOCATING-0} : 224 { 225 *(.rela.rodata) 226 ${RELOCATING+*(.rela.rodata.*)} 227 ${RELOCATING+*(.rela.gnu.linkonce.r.*)} 228 } 229 .rel.sdata ${RELOCATING-0} : 230 { 231 *(.rel.sdata) 232 ${RELOCATING+*(.rel.sdata.*)} 233 ${RELOCATING+*(.rel.gnu.linkonce.s.*)} 234 } 235 .rela.sdata ${RELOCATING-0} : 236 { 237 *(.rela.sdata) 238 ${RELOCATING+*(.rela.sdata.*)} 239 ${RELOCATING+*(.rela.gnu.linkonce.s.*)} 240 } 241 .rel.sbss ${RELOCATING-0} : 242 { 243 *(.rel.sbss) 244 ${RELOCATING+*(.rel.sbss.*)} 245 ${RELOCATING+*(.rel.gnu.linkonce.sb.*)} 246 } 247 .rela.sbss ${RELOCATING-0} : 248 { 249 *(.rela.sbss) 250 ${RELOCATING+*(.rela.sbss.*)} 251 ${RELOCATING+*(.rel.gnu.linkonce.sb.*)} 252 } 253 .rel.bss ${RELOCATING-0} : 254 { 255 *(.rel.bss) 256 ${RELOCATING+*(.rel.bss.*)} 257 ${RELOCATING+*(.rel.gnu.linkonce.b.*)} 258 } 259 .rela.bss ${RELOCATING-0} : 260 { 261 *(.rela.bss) 262 ${RELOCATING+*(.rela.bss.*)} 263 ${RELOCATING+*(.rela.gnu.linkonce.b.*)} 264 } 265 .rel.stext ${RELOCATING-0} : { *(.rel.stest) } 266 .rela.stext ${RELOCATING-0} : { *(.rela.stest) } 267 .rel.etext ${RELOCATING-0} : { *(.rel.etest) } 268 .rela.etext ${RELOCATING-0} : { *(.rela.etest) } 269 .rel.sdata ${RELOCATING-0} : { *(.rel.sdata) } 270 .rela.sdata ${RELOCATING-0} : { *(.rela.sdata) } 271 .rel.edata ${RELOCATING-0} : { *(.rel.edata) } 272 .rela.edata ${RELOCATING-0} : { *(.rela.edata) } 273 .rel.eit_v ${RELOCATING-0} : { *(.rel.eit_v) } 274 .rela.eit_v ${RELOCATING-0} : { *(.rela.eit_v) } 275 .rel.ebss ${RELOCATING-0} : { *(.rel.ebss) } 276 .rela.ebss ${RELOCATING-0} : { *(.rela.ebss) } 277 .rel.srodata ${RELOCATING-0} : { *(.rel.srodata) } 278 .rela.srodata ${RELOCATING-0} : { *(.rela.srodata) } 279 .rel.erodata ${RELOCATING-0} : { *(.rel.erodata) } 280 .rela.erodata ${RELOCATING-0} : { *(.rela.erodata) } 281 .rel.got ${RELOCATING-0} : { *(.rel.got) } 282 .rela.got ${RELOCATING-0} : { *(.rela.got) } 283 .rel.ctors ${RELOCATING-0} : { *(.rel.ctors) } 284 .rela.ctors ${RELOCATING-0} : { *(.rela.ctors) } 285 .rel.dtors ${RELOCATING-0} : { *(.rel.dtors) } 286 .rela.dtors ${RELOCATING-0} : { *(.rela.dtors) } 287 .rel.init ${RELOCATING-0} : { *(.rel.init) } 288 .rela.init ${RELOCATING-0} : { *(.rela.init) } 289 .rel.fini ${RELOCATING-0} : { *(.rel.fini) } 290 .rela.fini ${RELOCATING-0} : { *(.rela.fini) } 291 .rel.plt ${RELOCATING-0} : { *(.rel.plt) } 292 .rela.plt ${RELOCATING-0} : { *(.rela.plt) } 293 294 /* Concatenate .page0 sections. Put them in the page0 memory bank 295 unless we are creating a relocatable file. */ 296 .page0 : 297 { 298 *(.page0) 299 } ${RELOCATING+ > page0} 300 301 /* Start of text section. */ 302 .stext ${RELOCATING-0} : 303 { 304 *(.stext) 305 } ${RELOCATING+ > ${TEXT_MEMORY}} 306 307 .init ${RELOCATING-0} : 308 { 309 *(.init) 310 } ${RELOCATING+=${NOP-0}} 311 312 ${RELOCATING-${INSTALL_RELOC}} 313 ${RELOCATING-${FINISH_RELOC}} 314 315 .text ${RELOCATING-0}: 316 { 317 /* Put startup code at beginning so that _start keeps same address. */ 318 ${RELOCATING+${STARTUP_CODE}} 319 320 ${RELOCATING+*(.init)} 321 *(.text) 322 ${RELOCATING+*(.text.*)} 323 /* .gnu.warning sections are handled specially by elf32.em. */ 324 *(.gnu.warning) 325 ${RELOCATING+*(.gnu.linkonce.t.*)} 326 ${RELOCATING+*(.tramp)} 327 ${RELOCATING+*(.tramp.*)} 328 329 ${RELOCATING+${FINISH_CODE}} 330 331 ${RELOCATING+_etext = .;} 332 ${RELOCATING+PROVIDE (etext = .);} 333 ${RELOCATING+. = ALIGN(2);} 334 } ${RELOCATING+ > ${TEXT_MEMORY} =0xa7a7a7a7} 335 336 .eh_frame ${RELOCATING-0} : 337 { 338 KEEP (*(.eh_frame)) 339 } ${RELOCATING+ > ${TEXT_MEMORY}} 340 341 .gcc_except_table ${RELOCATING-0} : 342 { 343 *(.gcc_except_table) 344 } ${RELOCATING+ > ${TEXT_MEMORY}} 345 346 .rodata ${RELOCATING-0} : 347 { 348 *(.rodata) 349 ${RELOCATING+*(.rodata.*)} 350 ${RELOCATING+*(.gnu.linkonce.r*)} 351 ${RELOCATING+. = ALIGN(2);} 352 } ${RELOCATING+ > ${TEXT_MEMORY} =0xffffffff} 353 354 .rodata1 ${RELOCATING-0} : 355 { 356 *(.rodata1) 357 ${RELOCATING+. = ALIGN(2);} 358 } ${RELOCATING+ > ${TEXT_MEMORY} =0xffffffff} 359 360 /* Constructor and destructor tables are in ROM. */ 361 ${RELOCATING+${CTOR}} 362 ${RELOCATING+${DTOR}} 363 364 .jcr ${RELOCATING-0} : 365 { 366 KEEP (*(.jcr)) 367 } ${RELOCATING+ > ${TEXT_MEMORY}} 368 369 /* Start of the data section image in ROM. */ 370 ${RELOCATING+__data_image = .;} 371 ${RELOCATING+PROVIDE (__data_image = .);} 372 373 /* All read-only sections that normally go in PROM must be above. 374 We construct the DATA image section in PROM at end of all these 375 read-only sections. The data image must be copied at init time. 376 Refer to GNU ld, Section 3.6.8.2 Output Section LMA. */ 377 .data ${RELOCATING-0} : ${RELOCATING+AT (__data_image)} 378 { 379 ${RELOCATING+__data_section_start = .;} 380 ${RELOCATING+PROVIDE (__data_section_start = .);} 381 382 ${RELOCATING+${DATA_START_SYMBOLS}} 383 ${RELOCATING+*(.sdata)} 384 *(.data) 385 ${RELOCATING+*(.data.*)} 386 ${RELOCATING+*(.data1)} 387 ${RELOCATING+*(.gnu.linkonce.d.*)} 388 ${CONSTRUCTING+CONSTRUCTORS} 389 390 ${RELOCATING+_edata = .;} 391 ${RELOCATING+PROVIDE (edata = .);} 392 ${RELOCATING+. = ALIGN(2);} 393 } ${RELOCATING+ > ${DATA_MEMORY} =0xffffffff} 394 395 ${RELOCATING+__data_section_size = SIZEOF(.data);} 396 ${RELOCATING+PROVIDE (__data_section_size = SIZEOF(.data));} 397 ${RELOCATING+__data_image_end = __data_image + __data_section_size;} 398 399 ${RELOCATING+${PRE_COMPUTE_DATA_SIZE}} 400 401 /* .install ${RELOCATING-0}: 402 { 403 . = _data_image_end; 404 } ${RELOCATING+ > ${TEXT_MEMORY}} */ 405 406 /* Relocation for some bss and data sections. */ 407 ${RELOCATING-${BSS_DATA_RELOC}} 408 ${RELOCATING-${SOFT_REGS_RELOC}} 409 410 .bss ${RELOCATING-0} : 411 { 412 ${RELOCATING+__bss_start = .;} 413 ${RELOCATING+*(.softregs)} 414 ${RELOCATING+*(.sbss)} 415 ${RELOCATING+*(.scommon)} 416 417 *(.dynbss) 418 *(.bss) 419 ${RELOCATING+*(.bss.*)} 420 ${RELOCATING+*(.gnu.linkonce.b.*)} 421 *(COMMON) 422 ${RELOCATING+PROVIDE (_end = .);} 423 } ${RELOCATING+ > ${DATA_MEMORY}} 424 ${RELOCATING+__bss_size = SIZEOF(.bss);} 425 ${RELOCATING+PROVIDE (__bss_size = SIZEOF(.bss));} 426 427 .eeprom ${RELOCATING-0} : 428 { 429 *(.eeprom) 430 *(.eeprom.*) 431 } ${RELOCATING+ > ${EEPROM_MEMORY}} 432 433 ${RELOCATING+${VECTORS}} 434 435 /* Stabs debugging sections. */ 436 .stab 0 : { *(.stab) } 437 .stabstr 0 : { *(.stabstr) } 438 .stab.excl 0 : { *(.stab.excl) } 439 .stab.exclstr 0 : { *(.stab.exclstr) } 440 .stab.index 0 : { *(.stab.index) } 441 .stab.indexstr 0 : { *(.stab.indexstr) } 442 443 .comment 0 : { *(.comment) } 444 445 EOF 446 447 . $srcdir/scripttempl/DWARF.sc 448 449 cat <<EOF 450 } 451 EOF 452