source: rtems/bsps/m68k/mrm332/start/linkcmds @ 511dc4b

/*  linkcmds
 */

OUTPUT_ARCH(m68k)
ENTRY(start)
STARTUP(start.o)
__DYNAMIC  =  0;

/*
 * ROM:
 * +--------------------+ <- low memory
 * | .text              |
 * |        etext       |
 * |        ctor list   | the ctor and dtor lists are for
 * |        dtor list   | C++ support
 * |        _endtext    |
 * | temporary .data    | .data is moved to RAM by crt0
 * |                    |
 * +--------------------+ <- high memory
 *
 *
 * RAM:
 * +--------------------+ <- low memory
 * | .data              | initialized data goes here
 * |        _sdata      |
 * |        _edata      |
 * +--------------------+
 * | .bss               |
 * |        __bss_start | start of bss, cleared by crt0
 * |        _end        | start of heap, used by sbrk()
 * +--------------------+
 * |    heap space      |
 * |        _ENDHEAP    |
 * |    stack space     | 
 * +--------------------+ <- high memory
 */

/*
 * Declare some sizes.
 */
RomBase = DEFINED(RomBase) ? RomBase : 0x90000;
RamBase = DEFINED(RamBase) ? RamBase : 0x03000;
RamSize = DEFINED(RamSize) ? RamSize : 0x7d000;
_RamEnd = RamBase + RamSize;

MEMORY
{
  rom     : ORIGIN = 0x90000, LENGTH = 0x70000
  ram     : ORIGIN = 0x03000, LENGTH = 0x7d000
}

_copy_data_from_rom = 1;
HeapSize = DEFINED(HeapSize) ? HeapSize : 0x0;


/*
 * 
 */
SECTIONS
{
  .text :
  {
    . = .;
    text_start = .;
    _text_start = .;
    *(.text*)
    . = ALIGN (16);

        /*
         * C++ constructors/destructors
         */
        *(.gnu.linkonce.t.*)

    /*
     * Initialization and finalization code.
     *
     * Various files can provide initialization and finalization
     * functions.  crtbegin.o and crtend.o are two instances. The
     * body of these functions are in .init and .fini sections. We
     * accumulate the bodies here, and prepend function prologues
     * from crti.o and function epilogues from crtn.o. crti.o must
     * be linked first; crtn.o must be linked last.  Because these
     * are wildcards, it doesn't matter if the user does not
     * actually link against crti.o and crtn.o; the linker won't
     * look for a file to match a wildcard.  The wildcard also
     * means that it doesn't matter which directory crti.o and
     * crtn.o are in. 
     */
    PROVIDE (_init = .);
    *crti.o(.init)
    *(.init)
    *crtn.o(.init)
    PROVIDE (_fini = .);
    *crti.o(.fini)
    *(.fini)
    *crtn.o(.fini)

    /*
     * Special FreeBSD sysctl sections.
     */
    . = ALIGN (16);
    __start_set_sysctl_set = .;
    *(set_sysctl_*);
    __stop_set_sysctl_set = ABSOLUTE(.);
    *(set_domain_*);
    *(set_pseudo_*);

    /*
     * C++ constructors/destructors
     *
     * gcc uses crtbegin.o to find the start of the constructors
     * and destructors so we make sure it is first.  Because this
     * is a wildcard, it doesn't matter if the user does not
     * actually link against crtbegin.o; the linker won't look for
     * a file to match a wildcard.  The wildcard also means that
     * it doesn't matter which directory crtbegin.o is in. The
     * constructor and destructor list are terminated in
     * crtend.o.  The same comments apply to it.
     */
    . = ALIGN (16);
    *crtbegin.o(.ctors)
    *(.ctors)
    *crtend.o(.ctors)
    *crtbegin.o(.dtors)
    *(.dtors)
    *crtend.o(.dtors)

        /*
         * Exception frame info
         */
        . = ALIGN (16);
        *(.eh_frame)

    /*
     * Read-only data
     */
    . = ALIGN (16);
    _rodata_start = . ;
    *(.rodata*)
    KEEP (*(SORT(.rtemsroset.*)))
    *(.gnu.linkonce.r*)

    . = ALIGN (16);
    PROVIDE (_etext = .);
    _endtext = .;
    __data_start_rom = .;
  } > rom
  .tdata : {
    _TLS_Data_begin = .;
    *(.tdata .tdata.* .gnu.linkonce.td.*)
    _TLS_Data_end = .;
  } > rom
  .tbss : {
    _TLS_BSS_begin = .;
    *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon)
    _TLS_BSS_end = .;
  } > rom
  _TLS_Data_size = _TLS_Data_end - _TLS_Data_begin;
  _TLS_Data_begin = _TLS_Data_size != 0 ? _TLS_Data_begin : _TLS_BSS_begin;
  _TLS_Data_end = _TLS_Data_size != 0 ? _TLS_Data_end : _TLS_BSS_begin;
  _TLS_BSS_size = _TLS_BSS_end - _TLS_BSS_begin;
  _TLS_Size = _TLS_BSS_end - _TLS_Data_begin;
  _TLS_Alignment = MAX (ALIGNOF (.tdata), ALIGNOF (.tbss));
  .gcc_exc :
  AT ( ADDR(.tdata) + SIZEOF( .tdata ) )
  {
    *(.gcc_exc)
  } > ram
  .data : AT(__data_start_rom) 
  {
        PROVIDE (_copy_start = .);
    *(.data*)
        KEEP (*(SORT(.rtemsrwset.*)))
        *(.gnu.linkonce.d*)
        *(.gcc_except_table*)
        *(.jcr)
    . = ALIGN (16);
    PROVIDE (_edata = .);
    PROVIDE (_copy_end = .);
  } > ram
  .shbss : 
  {
    *(.shbss)
  } > ram
  .bss : 
  {
    M68Kvec = .;
    . += (256 * 4);
    _clear_start = .;
    *(.dynbss)
    *(.bss* .gnu.linkonce.b.*)
    *(COMMON)
    . = ALIGN (16);
    PROVIDE (end = .);
    _clear_end = .;
  } > ram
  .rtemsstack (NOLOAD) : {
    *(SORT(.rtemsstack.*))
    WorkAreaBase = .;
  } > ram
  .stab . (NOLOAD) :
  {
    [ .stab ]
  }
  .stabstr . (NOLOAD) :
  {
    [ .stabstr ]
  }
}