ld/scripttempl/elfm68hc11.sc

   1 #
   2 # Unusual variables checked by this code:
   3 #       NOP - four byte opcode for no-op (defaults to 0)
   4 #       DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
   5 #       OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
   6 #               (e.g., .PARISC.global)
   7 #       OTHER_SECTIONS - at the end
   8 #       EXECUTABLE_SYMBOLS - symbols that must be defined for an
   9 #               executable (e.g., _DYNAMIC_LINK)
  10 #       TEXT_START_SYMBOLS - symbols that appear at the start of the
  11 #               .text section.
  12 #       DATA_START_SYMBOLS - symbols that appear at the start of the
  13 #               .data section.
  14 #       OTHER_BSS_SYMBOLS - symbols that appear at the start of the
  15 #               .bss section besides __bss_start.
  16 #       EMBEDDED - whether this is for an embedded system.
  17 #
  18 # When adding sections, do note that the names of some sections are used
  19 # when specifying the start address of the next.
  20 #
  21 test -z "$ENTRY" && ENTRY=_start
  22 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  23 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  24 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
  25 test "$LD_FLAG" = "N" && DATA_ADDR=.
  26
  27 CTOR=".ctors ${CONSTRUCTING-0} :
  28   {
  29     ${CONSTRUCTING+ PROVIDE (__CTOR_LIST__ = .); }
  30     ${CONSTRUCTING+${CTOR_START}}
  31     *(.ctors)
  32     /* We don't want to include the .ctor section from
  33        from the crtend.o file until after the sorted ctors.
  34        The .ctor section from the crtend file contains the
  35        end of ctors marker and it must be last
  36
  37     KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
  38     KEEP (*(SORT(.ctors.*)))
  39     KEEP (*(.ctors)) */
  40
  41     ${CONSTRUCTING+${CTOR_END}}
  42     ${CONSTRUCTING+ PROVIDE(__CTOR_END__ = .); }
  43   } ${RELOCATING+ > ${TEXT_MEMORY}}"
  44
  45 DTOR="  .dtors  ${CONSTRUCTING-0} :
  46   {
  47     ${CONSTRUCTING+ PROVIDE(__DTOR_LIST__ = .); }
  48     *(.dtors)
  49     /*
  50     KEEP (*crtbegin.o(.dtors))
  51     KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
  52     KEEP (*(SORT(.dtors.*)))
  53     KEEP (*(.dtors)) */
  54     ${CONSTRUCTING+ PROVIDE(__DTOR_END__ = .); }
  55   } ${RELOCATING+ > ${TEXT_MEMORY}}"
  56
  57
  58 VECTORS="
  59   /* If the 'vectors_addr' symbol is defined, it indicates the start address
  60      of interrupt vectors.  This depends on the 68HC11 operating mode:
  61
  62                         Addr
  63      Single chip        0xffc0
  64      Extended mode      0xffc0
  65      Bootstrap          0x00c0
  66      Test               0xbfc0
  67
  68      In general, the vectors address is 0xffc0.  This can be overriden
  69      with the '-defsym vectors_addr=0xbfc0' ld option.
  70
  71      Note: for the bootstrap mode, the interrupt vectors are at 0xbfc0 but
  72      they are redirected to 0x00c0 by the internal PROM.  Application's vectors
  73      must also consist of jump instructions (see Motorola's manual).  */
  74
  75   PROVIDE (_vectors_addr = DEFINED (vectors_addr) ? vectors_addr : 0xffc0);
  76   .vectors DEFINED (vectors_addr) ? vectors_addr : 0xffc0 :
  77   {
  78     *(.vectors)
  79   }"
  80
  81 #
  82 # We provide two emulations: a fixed on that defines some memory banks
  83 # and a configurable one that includes a user provided memory definition.
  84 #
  85 case $GENERIC_BOARD in
  86   yes|1|YES)
  87         MEMORY_DEF="
  88 /* Get memory banks definition from some user configuration file.
  89    This file must be located in some linker directory (search path
  90    with -L<dir>). See fixed memory banks emulation script.  */
  91 INCLUDE memory.x;
  92 "
  93         ;;
  94   *)
  95 MEMORY_DEF="
  96 /* Fixed definition of the available memory banks.
  97    See generic emulation script for a user defined configuration.  */
  98 MEMORY
  99 {
 100   page0 (rwx) : ORIGIN = 0x0, LENGTH = 256
 101   text  (rx)  : ORIGIN = ${ROM_START_ADDR}, LENGTH = ${ROM_SIZE}
 102   data        : ORIGIN = ${RAM_START_ADDR}, LENGTH = ${RAM_SIZE}
 103   eeprom      : ORIGIN = ${EEPROM_START_ADDR}, LENGTH = ${EEPROM_SIZE}
 104 }
 105
 106 /* Setup the stack on the top of the data memory bank.  */
 107 PROVIDE (_stack = ${RAM_START_ADDR} + ${RAM_SIZE} - 1);
 108 "
 109         ;;
 110 esac
 111
 112 STARTUP_CODE="
 113     /* Startup code.  */
 114     *(.install0)        /* Section should setup the stack pointer.  */
 115     *(.install1)        /* Place holder for applications.  */
 116     *(.install2)        /* Optional installation of data sections in RAM.  */
 117     *(.install3)        /* Place holder for applications.  */
 118     *(.install4)        /* Section that calls the main.  */
 119 "
 120
 121 FINISH_CODE="
 122     /* Finish code.  */
 123     *(.fini0)           /* Beginning of finish code (_exit symbol).  */
 124     *(.fini1)           /* Place holder for applications.  */
 125     *(.fini2)           /* C++ destructors.  */
 126     *(.fini3)           /* Place holder for applications.  */
 127     *(.fini4)           /* Runtime exit.  */
 128 "
 129
 130 PRE_COMPUTE_DATA_SIZE="
 131 /* SCz: this does not work yet... This is supposed to force the loading
 132    of _map_data.o (from libgcc.a) when the .data section is not empty.
 133    By doing so, this should bring the code that copies the .data section
 134    from ROM to RAM at init time.
 135
 136   ___pre_comp_data_size = SIZEOF(.data);
 137   __install_data_sections = ___pre_comp_data_size > 0 ?
 138                 __map_data_sections : 0;
 139 */
 140 "
 141
 142 INSTALL_RELOC="
 143   .install0 0 : { *(.install0) }
 144   .install1 0 : { *(.install1) }
 145   .install2 0 : { *(.install2) }
 146   .install3 0 : { *(.install3) }
 147   .install4 0 : { *(.install4) }
 148 "
 149
 150 FINISH_RELOC="
 151   .fini0 0 : { *(.fini0) }
 152   .fini1 0 : { *(.fini1) }
 153   .fini2 0 : { *(.fini2) }
 154   .fini3 0 : { *(.fini3) }
 155   .fini4 0 : { *(.fini4) }
 156 "
 157
 158 BSS_DATA_RELOC="
 159   .data1 0 : { *(.data1) }
 160
 161   /* We want the small data sections together, so single-instruction offsets
 162      can access them all, and initialized data all before uninitialized, so
 163      we can shorten the on-disk segment size.  */
 164   .sdata   0 : { *(.sdata) }
 165   .sbss    0 : { *(.sbss) }
 166   .scommon 0 : { *(.scommon) }
 167 "
 168
 169 SOFT_REGS_RELOC="
 170   .softregs 0 : { *(.softregs) }
 171 "
 172
 173 cat <<EOF
 174 ${RELOCATING+/* Linker script for 68HC11 executable (PROM).  */}
 175 ${RELOCATING-/* Linker script for 68HC11 object file (ld -r).  */}
 176
 177 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
 178               "${LITTLE_OUTPUT_FORMAT}")
 179 OUTPUT_ARCH(${OUTPUT_ARCH})
 180 ENTRY(${ENTRY})
 181
 182 ${RELOCATING+${LIB_SEARCH_DIRS}}
 183 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
 184 ${RELOCATING+${MEMORY_DEF}}
 185
 186 SECTIONS
 187 {
 188   .hash        ${RELOCATING-0} : { *(.hash)             }
 189   .dynsym      ${RELOCATING-0} : { *(.dynsym)           }
 190   .dynstr      ${RELOCATING-0} : { *(.dynstr)           }
 191   .gnu.version          ${RELOCATING-0} : { *(.gnu.version) }
 192   .gnu.version_d        ${RELOCATING-0} : { *(.gnu.version_d) }
 193   .gnu.version_r        ${RELOCATING-0} : { *(.gnu.version_r) }
 194
 195   .rel.text    ${RELOCATING-0} :
 196     {
 197       *(.rel.text)
 198       ${RELOCATING+*(.rel.text.*)}
 199       ${RELOCATING+*(.rel.gnu.linkonce.t.*)}
 200     }
 201   .rela.text   ${RELOCATING-0} :
 202     {
 203       *(.rela.text)
 204       ${RELOCATING+*(.rela.text.*)}
 205       ${RELOCATING+*(.rela.gnu.linkonce.t.*)}
 206     }
 207   .rel.data    ${RELOCATING-0} :
 208     {
 209       *(.rel.data)
 210       ${RELOCATING+*(.rel.data.*)}
 211       ${RELOCATING+*(.rel.gnu.linkonce.d.*)}
 212     }
 213   .rela.data   ${RELOCATING-0} :
 214     {
 215       *(.rela.data)
 216       ${RELOCATING+*(.rela.data.*)}
 217       ${RELOCATING+*(.rela.gnu.linkonce.d.*)}
 218     }
 219   .rel.rodata  ${RELOCATING-0} :
 220     {
 221       *(.rel.rodata)
 222       ${RELOCATING+*(.rel.rodata.*)}
 223       ${RELOCATING+*(.rel.gnu.linkonce.r.*)}
 224     }
 225   .rela.rodata ${RELOCATING-0} :
 226     {
 227       *(.rela.rodata)
 228       ${RELOCATING+*(.rela.rodata.*)}
 229       ${RELOCATING+*(.rela.gnu.linkonce.r.*)}
 230     }
 231   .rel.sdata   ${RELOCATING-0} :
 232     {
 233       *(.rel.sdata)
 234       ${RELOCATING+*(.rel.sdata.*)}
 235       ${RELOCATING+*(.rel.gnu.linkonce.s.*)}
 236     }
 237   .rela.sdata   ${RELOCATING-0} :
 238     {
 239       *(.rela.sdata)
 240       ${RELOCATING+*(.rela.sdata.*)}
 241       ${RELOCATING+*(.rela.gnu.linkonce.s.*)}
 242     }
 243   .rel.sbss    ${RELOCATING-0} :
 244     {
 245       *(.rel.sbss)
 246       ${RELOCATING+*(.rel.sbss.*)}
 247       ${RELOCATING+*(.rel.gnu.linkonce.sb.*)}
 248     }
 249   .rela.sbss   ${RELOCATING-0} :
 250     {
 251       *(.rela.sbss)
 252       ${RELOCATING+*(.rela.sbss.*)}
 253       ${RELOCATING+*(.rel.gnu.linkonce.sb.*)}
 254     }
 255   .rel.bss     ${RELOCATING-0} :
 256     {
 257       *(.rel.bss)
 258       ${RELOCATING+*(.rel.bss.*)}
 259       ${RELOCATING+*(.rel.gnu.linkonce.b.*)}
 260     }
 261   .rela.bss    ${RELOCATING-0} :
 262     {
 263       *(.rela.bss)
 264       ${RELOCATING+*(.rela.bss.*)}
 265       ${RELOCATING+*(.rela.gnu.linkonce.b.*)}
 266     }
 267   .rela.stext           ${RELOCATING-0} : { *(.rela.stest) }
 268   .rela.etext           ${RELOCATING-0} : { *(.rela.etest) }
 269   .rela.sdata           ${RELOCATING-0} : { *(.rela.sdata) }
 270   .rela.edata           ${RELOCATING-0} : { *(.rela.edata) }
 271   .rela.eit_v           ${RELOCATING-0} : { *(.rela.eit_v) }
 272   .rela.ebss            ${RELOCATING-0} : { *(.rela.ebss) }
 273   .rela.srodata         ${RELOCATING-0} : { *(.rela.srodata) }
 274   .rela.erodata         ${RELOCATING-0} : { *(.rela.erodata) }
 275   .rela.got             ${RELOCATING-0} : { *(.rela.got) }
 276   .rela.ctors           ${RELOCATING-0} : { *(.rela.ctors) }
 277   .rela.dtors           ${RELOCATING-0} : { *(.rela.dtors) }
 278   .rela.init            ${RELOCATING-0} : { *(.rela.init) }
 279   .rela.fini            ${RELOCATING-0} : { *(.rela.fini) }
 280   .rela.plt             ${RELOCATING-0} : { *(.rela.plt) }
 281
 282   .rel.stext            ${RELOCATING-0} : { *(.rel.stest) }
 283   .rel.etext            ${RELOCATING-0} : { *(.rel.etest) }
 284   .rel.sdata            ${RELOCATING-0} : { *(.rel.sdata) }
 285   .rel.edata            ${RELOCATING-0} : { *(.rel.edata) }
 286   .rel.ebss             ${RELOCATING-0} : { *(.rel.ebss) }
 287   .rel.eit_v            ${RELOCATING-0} : { *(.rel.eit_v) }
 288   .rel.srodata          ${RELOCATING-0} : { *(.rel.srodata) }
 289   .rel.erodata          ${RELOCATING-0} : { *(.rel.erodata) }
 290   .rel.got              ${RELOCATING-0} : { *(.rel.got) }
 291   .rel.ctors            ${RELOCATING-0} : { *(.rel.ctors) }
 292   .rel.dtors            ${RELOCATING-0} : { *(.rel.dtors) }
 293   .rel.init             ${RELOCATING-0} : { *(.rel.init) }
 294   .rel.fini             ${RELOCATING-0} : { *(.rel.fini) }
 295   .rel.plt              ${RELOCATING-0} : { *(.rel.plt) }
 296
 297   /* Concatenate .page0 sections.  Put them in the page0 memory bank
 298      unless we are creating a relocatable file.  */
 299   .page0 :
 300   {
 301     *(.page0)
 302     ${RELOCATING+*(.softregs)}
 303   } ${RELOCATING+ > page0}
 304
 305   /* Start of text section.  */
 306   .stext ${RELOCATING-0} :
 307   {
 308     *(.stext)
 309   } ${RELOCATING+ > ${TEXT_MEMORY}}
 310
 311   .init ${RELOCATING-0} :
 312   {
 313     *(.init)
 314   } ${RELOCATING+=${NOP-0}}
 315
 316   ${RELOCATING-${INSTALL_RELOC}}
 317   ${RELOCATING-${FINISH_RELOC}}
 318
 319   .text ${RELOCATING-0}:
 320   {
 321     /* Put startup code at beginning so that _start keeps same address.  */
 322     ${RELOCATING+${STARTUP_CODE}}
 323
 324     ${RELOCATING+*(.init)}
 325     *(.text)
 326     ${RELOCATING+*(.text.*)}
 327     /* .gnu.warning sections are handled specially by elf32.em.  */
 328     *(.gnu.warning)
 329     ${RELOCATING+*(.gnu.linkonce.t.*)}
 330
 331     ${RELOCATING+${FINISH_CODE}}
 332
 333     ${RELOCATING+_etext = .;}
 334     ${RELOCATING+PROVIDE (etext = .);}
 335
 336   } ${RELOCATING+ > ${TEXT_MEMORY}}
 337
 338   .eh_frame ${RELOCATING-0} :
 339   {
 340     KEEP (*(.eh_frame))
 341   } ${RELOCATING+ > ${TEXT_MEMORY}}
 342
 343   .rodata  ${RELOCATING-0} :
 344   {
 345     *(.rodata)
 346     ${RELOCATING+*(.rodata.*)}
 347     ${RELOCATING+*(.gnu.linkonce.r*)}
 348   } ${RELOCATING+ > ${TEXT_MEMORY}}
 349
 350   .rodata1 ${RELOCATING-0} :
 351   {
 352     *(.rodata1)
 353   } ${RELOCATING+ > ${TEXT_MEMORY}}
 354
 355   /* Constructor and destructor tables are in ROM.  */
 356   ${RELOCATING+${CTOR}}
 357   ${RELOCATING+${DTOR}}
 358
 359   .jcr ${RELOCATING-0} :
 360   {
 361     KEEP (*(.jcr))
 362   } ${RELOCATING+ > ${TEXT_MEMORY}}
 363
 364   /* Start of the data section image in ROM.  */
 365   ${RELOCATING+__data_image = .;}
 366   ${RELOCATING+PROVIDE (__data_image = .);}
 367
 368   /* All read-only sections that normally go in PROM must be above.
 369      We construct the DATA image section in PROM at end of all these
 370      read-only sections.  The data image must be copied at init time.
 371      Refer to GNU ld, Section 3.6.8.2 Output Section LMA.  */
 372   .data  ${RELOCATING-0} : ${RELOCATING+AT (__data_image)}
 373   {
 374     ${RELOCATING+__data_section_start = .;}
 375     ${RELOCATING+PROVIDE (__data_section_start = .);}
 376
 377     ${RELOCATING+${DATA_START_SYMBOLS}}
 378     ${RELOCATING+*(.sdata)}
 379     *(.data)
 380     ${RELOCATING+*(.data.*)}
 381     ${RELOCATING+*(.data1)}
 382     ${RELOCATING+*(.gnu.linkonce.d.*)}
 383     ${CONSTRUCTING+CONSTRUCTORS}
 384
 385     ${RELOCATING+_edata  =  .;}
 386     ${RELOCATING+PROVIDE (edata = .);}
 387   } ${RELOCATING+ > ${DATA_MEMORY}}
 388
 389   ${RELOCATING+__data_section_size = SIZEOF(.data);}
 390   ${RELOCATING+PROVIDE (__data_section_size = SIZEOF(.data));}
 391   ${RELOCATING+__data_image_end = __data_image + __data_section_size;}
 392
 393   ${RELOCATING+${PRE_COMPUTE_DATA_SIZE}}
 394
 395   /* .install ${RELOCATING-0}:
 396   {
 397     . = _data_image_end;
 398   } ${RELOCATING+ > ${TEXT_MEMORY}} */
 399
 400   /* Relocation for some bss and data sections.  */
 401   ${RELOCATING-${BSS_DATA_RELOC}}
 402   ${RELOCATING-${SOFT_REGS_RELOC}}
 403
 404   .bss ${RELOCATING-0} :
 405   {
 406     ${RELOCATING+__bss_start = .;}
 407     ${RELOCATING+*(.sbss)}
 408     ${RELOCATING+*(.scommon)}
 409
 410     *(.dynbss)
 411     *(.bss)
 412     ${RELOCATING+*(.bss.*)}
 413     ${RELOCATING+*(.gnu.linkonce.b.*)}
 414     *(COMMON)
 415     ${RELOCATING+PROVIDE (_end = .);}
 416   } ${RELOCATING+ > ${DATA_MEMORY}}
 417   ${RELOCATING+__bss_size = SIZEOF(.bss);}
 418   ${RELOCATING+PROVIDE (__bss_size = SIZEOF(.bss));}
 419
 420   .eeprom ${RELOCATING-0} :
 421   {
 422     *(.eeprom)
 423     *(.eeprom.*)
 424   } ${RELOCATING+ > ${EEPROM_MEMORY}}
 425
 426   ${RELOCATING+${VECTORS}}
 427
 428   /* Stabs debugging sections.  */
 429   .stab          0 : { *(.stab) }
 430   .stabstr       0 : { *(.stabstr) }
 431   .stab.excl     0 : { *(.stab.excl) }
 432   .stab.exclstr  0 : { *(.stab.exclstr) }
 433   .stab.index    0 : { *(.stab.index) }
 434   .stab.indexstr 0 : { *(.stab.indexstr) }
 435
 436   .comment       0 : { *(.comment) }
 437
 438   /* DWARF debug sections.
 439      Symbols in the DWARF debugging sections are relative to the beginning
 440      of the section so we begin them at 0.
 441      Treatment of DWARF debug section must be at end of the linker
 442      script to avoid problems when there are undefined symbols. It's necessary
 443      to avoid that the DWARF section is relocated before such undefined
 444      symbols are found.  */
 445
 446   /* DWARF 1 */
 447   .debug         0 : { *(.debug) }
 448   .line          0 : { *(.line) }
 449
 450   /* GNU DWARF 1 extensions */
 451   .debug_srcinfo 0 : { *(.debug_srcinfo) }
 452   .debug_sfnames 0 : { *(.debug_sfnames) }
 453
 454   /* DWARF 1.1 and DWARF 2 */
 455   .debug_aranges  0 : { *(.debug_aranges) }
 456   .debug_pubnames 0 : { *(.debug_pubnames) }
 457
 458   /* DWARF 2 */
 459   .debug_info     0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }
 460   .debug_abbrev   0 : { *(.debug_abbrev) }
 461   .debug_line     0 : { *(.debug_line) }
 462   .debug_frame    0 : { *(.debug_frame) }
 463   .debug_str      0 : { *(.debug_str) }
 464   .debug_loc      0 : { *(.debug_loc) }
 465   .debug_macinfo  0 : { *(.debug_macinfo) }
 466 }
 467 EOF