Subversion Repositories openrisc_2011-10-31

/*
 *  This file contains directives for the GNU linker which are specific
 *  to the helas-403
 *  This file is intended to be used together with flashentry.s
 *  it will generate a ROM that can be started directly after powerup reset
 *  $Id: linkcmds,v 1.2 2001-09-27 12:00:36 chris Exp $
 */

OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc",
              "elf32-powerpc")
OUTPUT_ARCH(powerpc)
 SEARCH_DIR(/usr/local/powerpc-rtems/lib);
 
ENTRY(flash_entry)
 
MEMORY
  {
        RAM : ORIGIN = 0, LENGTH = 8M
        FLASH : ORIGIN = 0xFFF00000, LENGTH = 512K
  }

  /* DIRTY TRICK: repeat addresses here, so we can work with them... */
  flash.start = 0xFFF00000;
  flash.size  = 512K; 

SECTIONS
{
  .entry :
  {
     *(.entry)
  } > FLASH /* this is ROM for flash_entry */
  .text :
  {
     text.start = . ;
     *(.entry2)
     *(.text)
     *(.rodata)
     *(.rodata1)
     *(.descriptors)
     *(rom_ver)
     etext = ALIGN(0x10);
     _etext = .;


     __CTOR_LIST__ = .;
     LONG((__CTOR_END__ - __CTOR_LIST__) / 4 - 2)
     *(.ctors)
     LONG(0)
     __CTOR_END__ = .;

     __DTOR_LIST__ = .;
     LONG((__DTOR_END__ - __DTOR_LIST__) / 4 - 2)
     *(.dtors)
     LONG(0)
     __DTOR_END__ = .;

     *(.lit)
     *(.shdata)
     *(.init)
     *(.fini)
     . = ALIGN(0x10);
     _endtext = .;
     text.end = .;
     copy.src = .;
     copy.tmptop.txt = .;
  } > FLASH /* this is ROM for flash_entry */

  text.size = text.end - text.start;

  /* R/W Data */
  /* place vectors to start at offset 0x100... */
  /* IMPORTANT: sections ".fill" and ".vectors" must be the first in RAM!!*/
  .fill 0x00010000 :
  {
    . = . + 0x0100;
  } > RAM
  
  .vectors :              AT (copy.src)
  {
    copy.dest = .;
    *(.vectors)
    . = ALIGN(0x10);
    copy.tmptop.vec = .;
  } > RAM

  .data :                 AT (copy.tmptop.vec - copy.dest + copy.src)
  {
    *(.data)
    *(.data1)
    PROVIDE (__SDATA_START__ = .);
    *(.sdata)
    . = ALIGN(0x10);
    copy.tmptop.dat = .;
  } > RAM
 
  PROVIDE (__EXCEPT_START__ = .);
  .gcc_except_table   :   AT (copy.tmptop.dat - copy.dest + copy.src)
  { 
    *(.gcc_except_table) 
    . = ALIGN(0x10);
    copy.tmptop.exc = .;
  } >RAM
  PROVIDE (__EXCEPT_END__ = .);

  __GOT_START__ = .;
  .got :                  AT (copy.tmptop.exc - copy.dest + copy.src)
  {
    s.got = .;
    *(.got.plt) *(.got)
    . = ALIGN(0x10);
    copy.tmptop.got = .;
  } > RAM
  __GOT_END__ = .;

  .got1 :                 AT (copy.tmptop.got - copy.dest + copy.src)
  { 
    *(.got1)            
    . = ALIGN(0x10);
    copy.tmptop.gt1 = .;
  } >RAM

  PROVIDE (__GOT2_START__ = .);
  PROVIDE (_GOT2_START_ = .);
  .got2           :       AT (copy.tmptop.gt1 - copy.dest + copy.src)
  { 
    *(.got2)    
    . = ALIGN(0x10);
    copy.tmptop.gt2 = .;
  } >RAM
  PROVIDE (__GOT2_END__ = .);
  PROVIDE (_GOT2_END_ = .);

  PROVIDE (__FIXUP_START__ = .);
  PROVIDE (_FIXUP_START_ = .);
  .fixup          :       AT (copy.tmptop.gt2 - copy.dest + copy.src)
  { 
    *(.fixup)   
    . = ALIGN(0x10);
    copy.tmptop.fix = .;
  } >RAM
  PROVIDE (_FIXUP_END_ = .);
  PROVIDE (__FIXUP_END__ = .);
 
  PROVIDE (__SDATA2_START__ = .);
  .sdata2         :       AT (copy.tmptop.fix - copy.dest + copy.src)
  { 
    *(.sdata2)  
    . = ALIGN(0x10);
    copy.tmptop.sda = .;
  } >RAM

  copy.size = copy.tmptop.sda - copy.dest;

  .sbss2          : 
  { 
    *(.sbss2)   
  } >RAM
  PROVIDE (__SBSS2_END__ = .);

  __SBSS_START__ = .;
  .bss :
  {
    bss.start = .;
    *(.bss) *(.sbss) *(COMMON)
    bss.end = ALIGN(4);
  } > RAM
  __SBSS_END__ = .;
 
  bss.size = bss.end - bss.start;

  /* reserve 16KByte for stack... */
  stack.end = bss.end + 16K;
  PROVIDE(_end = stack.end);

  .line 0 : { *(.line) }
  .debug 0 : { *(.debug) }
  .debug_sfnames 0 : { *(.debug_sfnames) }
  .debug_srcinfo 0 : { *(.debug_srcinfo) }
  .debug_pubnames 0 : { *(.debug_pubnames) }
  .debug_aranges 0 : { *(.debug_aranges) }
  .debug_aregion 0 : { *(.debug_aregion) }
  .debug_macinfo 0 : { *(.debug_macinfo) }
  .stab 0 : { *(.stab) }
  .stabstr 0 : { *(.stabstr) }

  /* 
   * place reset instruction into last word of FLASH 
   * NOTE: after reset, PPC403 starts executing from address
   * 0xFFFFFFFC
   * The reset section is placed in ROM at 0xF7FFFFFC instead, 
   * but a mirror of this address exists at 0xFFFFFFFC due to
   * the initial memory controller setup
   */
  .reset  flash.start - 4 + flash.size :
  {
    *(.reset)
  } > FLASH
}