linkcmds

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

/*
 *  This file contains directives for the GNU linker which are specific
 *  to the Motorola MVME167 board. This linker script produces ELF
 *  executables.
 *
 *  Copyright (c) 1999, National Research Council of Canada.
 *  Some of this material was copied from binutils-2.9.4 linker scripts,
 *  and is therefore likely to be copyrighted by the Free Software
 *  Foundation, even though explicit copyright notices did not appear in
 *  those files.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  $Id: linkcmds,v 1.9.2.1 2003/09/04 18:44:42 joel Exp $
 */

/* These are not really needed here */
OUTPUT_FORMAT("elf32-m68k")
OUTPUT_ARCH(m68k)
ENTRY(_start)

/*
 * Declare some sizes. Heap is sized at whatever ram space is left.
 */
_RamBase = DEFINED(_RamBase) ? _RamBase : 0x00800000;
_RamSize = DEFINED(_RamSize) ? _RamSize : 4M;
_HeapSize = DEFINED(_HeapSize) ? _HeapSize : 0;
_StackSize = DEFINED(_StackSize) ? _StackSize : 0x1000;

MEMORY
{
  /*  The location of RAM is the address space is configurable.
      This is where we put one board. The base address should be
      passed as a parameter when building multiprocessor images
      where each board resides at a different address. */
  ram  : org = 0x00800000, l = 4M
  rom  : org = 0xFF800000, l = 4M
  sram : org = 0xFFE00000, l = 128K
}

SECTIONS
{
 /*
  * Text, data and bss segments
  */
  .text : {
    *(.text)

    /*
     * 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*)
    *(.gnu.linkonce.r*)
    PROVIDE(_erodata = . );

    . = ALIGN (16);
    PROVIDE (_etext = .);
  } >ram
  
  .data : {
    PROVIDE (_copy_start = .);
    *(.data)
    *(.gnu.linkonce.d*)
    *(.gcc_except_table)
    *(.jcr)
    . = ALIGN (16);
    PROVIDE (_edata = .);
    PROVIDE (_copy_end = .);
  } >ram
  
 .bss : {
    _clear_start = .;
    *(.bss)
    *(COMMON)
    . = ALIGN (16);
    PROVIDE (end = .);

    . += _StackSize;
    . = ALIGN (16);
    _stack_init = .;
    _clear_end = .;

    _WorkspaceBase = .;
  } >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  .  */
}