rtems/bsps/m68k/uC5282/start/linkcmds

/*
 *  This file contains directives for the GNU linker which are specific
 *  to the Arcturus uC DIMM ColdFire 5282
 *
 *  Author: W. Eric Norum <norume@aps.anl.gov>
 *
 *  COPYRIGHT (c) 2005-2007.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

/*
 * Declare some locations and sizes.
 */
RamBase = DEFINED(RamBase) ? RamBase : 0x0;
RamSize = DEFINED(RamSize) ? RamSize : 16M;
RamEnd = RamBase + RamSize;
HeapSize = DEFINED(HeapSize) ? HeapSize : 0;
_FlashBase = DEFINED(_FlashBase) ? _FlashBase : 0x10000000;
_FlashSize = DEFINED(_FlashSize) ? _FlashSize : 4M ;

/*
 * Location of downloaded (from TFTP or flash) file
 */
_DownloadLocation = 0x40000;

/*
 * System clock speed
 *
 * If autodetection of the system clock pased on the PLL ref. clock
 * (AFAIK 8MHz for both 64MHz and 80MHz boards) doesn't work then
 * you can:
 *   - define (nonzero) system clock speed from app- linkflags (or here)
 *   - use a uCbootloader env. var: SYS_CLOCK_SPEED to define it.
 * You can also redefine the PLL reference clock speed from linkflags
 * or here...
 */
_CPUClockSpeed    = DEFINED(_CPUClockSpeed)    ? _CPUClockSpeed : 0 ;
_PLLRefClockSpeed = DEFINED(_PLLRefClockSpeed) ? _PLLRefClockSpeed : 8000000;

/*
 * Location of on-chip devices
 */
__IPSBAR = DEFINED(__IPSBAR) ? __IPSBAR : 0x40000000 ;
__SRAMBASE = DEFINED(__SRAMBASE) ? __SRAMBASE : 0x20000000 ;
_VBR = 0x0;

ENTRY(start)
STARTUP(start.o)

MEMORY
{
    ram : ORIGIN = 0, LENGTH = 16M
    sram : ORIGIN = 0x20000000, LENGTH = 64k
}

SECTIONS
{

    _header_offset = 0;

    /*
     * Text, data and bss segments
     */
    .text _DownloadLocation : {

        *(.text*)
        *(.ram_code)

        /*
         * 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 = .);
        KEEP (*crti.o(.init))
        KEEP (*(.init))
        KEEP (*crtn.o(.init))
        PROVIDE (_fini = .);
        KEEP (*crti.o(.fini))
        KEEP (*(.fini))
        KEEP (*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);
        KEEP (*crtbegin.o(.ctors))
        KEEP (*crtbegin?.o(.ctors))
        KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
        KEEP (*(SORT(.ctors.*)))
        KEEP (*(.ctors))
        KEEP (*crtbegin.o(.dtors))
        KEEP (*crtbegin?.o(.dtors))
        KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
        KEEP (*(SORT(.dtors.*)))
        KEEP (*(.dtors))

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

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

        . = ALIGN (16);

        *(.console_gdb_xfer)
        *(.bootstrap_data)
        . = ALIGN(16);
        _estuff = .;
        PROVIDE (_etext = .);
    } >ram

    .tdata : {
        _TLS_Data_begin = .;
        *(.tdata .tdata.* .gnu.linkonce.td.*)
        _TLS_Data_end = .;
    } > ram

    .tbss : {
        _TLS_BSS_begin = .;
        *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon)
        _TLS_BSS_end = .;
    } > ram

    _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));

    .data : {
        PROVIDE( _data_dest_start = . );
        PROVIDE( _copy_start = .);
        *(.data*)
        KEEP (*(SORT(.rtemsrwset.*)))
        *(.gnu.linkonce.d*)
        *(.gcc_except_table*)
        KEEP (*(.jcr))
        . = ALIGN (16);
        PROVIDE (_edata = .);
        PROVIDE (_copy_end = .);
        PROVIDE (_data_dest_end = . );
    } >ram

    _data_src_start = LOADADDR(.data);
    _data_src_end = _data_src_start + SIZEOF(.data);

    .bss : {
        _clear_start = .;
        *(.bss*)
        *(.gnu.linkonce.b.*)
        *(COMMON)
        . = ALIGN (16);
        PROVIDE (end = .);
        _clear_end = .;
    } >ram

    .rtemsstack (NOLOAD) : {
        *(SORT(.rtemsstack.*))
        WorkAreaBase = .;
    } >ram

  /* Stabs debugging sections.  */
  .stab 0 : { *(.stab) }
  .stabstr 0 : { *(.stabstr) }
  .stab.excl 0 : { *(.stab.excl) }
  .stab.exclstr 0 : { *(.stab.exclstr) }
  .stab.index 0 : { *(.stab.index) }
  .stab.indexstr 0 : { *(.stab.indexstr) }
  .comment 0 : { *(.comment) }

  /* DWARF debug sections.
     Symbols in the DWARF debugging sections are relative to the beginning
     of the section so we begin them at 0.  */
  /* DWARF 1 */
  .debug          0 : { *(.debug) }
  .line           0 : { *(.line) }

  /* GNU DWARF 1 extensions */
  .debug_srcinfo  0 : { *(.debug_srcinfo) }
  .debug_sfnames  0 : { *(.debug_sfnames) }

  /* DWARF 1.1 and DWARF 2 */
  .debug_aranges  0 : { *(.debug_aranges) }
  .debug_pubnames 0 : { *(.debug_pubnames) }

  /* DWARF 2 */
  .debug_info     0 : { *(.debug_info) }
  .debug_abbrev   0 : { *(.debug_abbrev) }
  .debug_line     0 : { *(.debug_line) }
  .debug_frame    0 : { *(.debug_frame) }
  .debug_str      0 : { *(.debug_str) }
  .debug_loc      0 : { *(.debug_loc) }
  .debug_macinfo  0 : { *(.debug_macinfo) }

  /* SGI/MIPS DWARF 2 extensions */
  .debug_weaknames 0 : { *(.debug_weaknames) }
  .debug_funcnames 0 : { *(.debug_funcnames) }
  .debug_typenames 0 : { *(.debug_typenames) }
  .debug_varnames  0 : { *(.debug_varnames) }
  /* These must appear regardless of  .  */

PROVIDE (end_of_all = .);
}