Subversion Repositories openrisc_2011-10-31

/*

 *uncomment this if you want the linker to output srecords.

OUTPUT_FORMAT(srec)

 *

 */

ENTRY(_start)

STARTUP(crt0.o)

OUTPUT_ARCH(sparc)

SEARCH_DIR(.)

__DYNAMIC  =  0;

GROUP (-lc -lslite930 -lgcc)

/*

 * The memory map looks like this:

 * +--------------------+ <- low memory

 * | .text              |

 * |        _stext       |

 * |        _etext      |

 * |        ctor list   | the ctor and dtor lists are for

 * |        dtor list   | C++ support

 * |        _end_text   |

 * +--------------------+

 * | .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     |

 * |        __stack     | top of stack

 * +--------------------+ <- high memory

 */

_STACK_SIZE = (16 * 1024);

_RAM_SIZE = 2M;

_RAM_START = 0x40000000;

_RAM_END = _RAM_START + _RAM_SIZE;

/*

 * Base address of the on-CPU peripherals. This is for compatability

 * with the simulator.

 */

_ERC32_MEC = 0x0;

/*

 * Setup the memory map of the MB86931-EB Board (ex931)

 * stack grows down towards low memory.

 */

MEMORY

{

  ram (rwx) : ORIGIN = 0x40000000, LENGTH = 2M

}

__stack = _RAM_START + _RAM_SIZE - 4 * 16;

__trap_stack = (_RAM_START + _RAM_SIZE - 4 * 16) - _STACK_SIZE;

/*

 * All the symbols that might be accessed from C code need to be

 * listed twice, once with an additional underscore. aout format needs

 * and extra underscore, whereas coff & elf doesn't. This is to work

 * with both.

 */

/*

 * Initalize some symbols to be zero so we can reference them in the

 * crt0 without core dumping. These functions are all optional, but

 * we do this so we can have our crt0 always use them if they exist.

 * This is so BSPs work better when using the crt0 installed with gcc.

 * We have to initalize them twice, so we cover a.out (which prepends

 * an underscore) and coff object file formats.

 */

PROVIDE (hardware_init_hook = 0);

PROVIDE (_hardware_init_hook = 0);

PROVIDE (software_init_hook = 0);

PROVIDE (_software_init_hook = 0);

SECTIONS

{

  .text : {

    stext = .;

    _stext = .;

    CREATE_OBJECT_SYMBOLS

    *(.text)

     __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__ = .;

    _etext  =  .;

    *(.lit)

    *(.shdata)

  }  > ram

  .shbss SIZEOF(.text) + ADDR(.text) :  {

    *(.shbss)

  }

  .talias : { }  > ram

  .data  : {

    sdata  =  .;

    _sdata  =  .;

    *(.data)

    edata  =  .;

    _edata  =  .;

  } > ram

  .bss SIZEOF(.data) + ADDR(.data) : {

   sbss = . ;

   _sbss = . ;

   __bss_start = ALIGN(0x8);

   __bss_start = ALIGN(0x8);

   *(.bss)

   *(COMMON)

     end = ALIGN(0x8);

     _end = ALIGN(0x8);

     __end = ALIGN(0x8);

     ebss = .;

     _ebss = .;

  }

  .mstack  : { }  > ram

  .rstack  : { }  > ram

  .stab  0 (NOLOAD) : {

    [ .stab ]

  }

  .stabstr  0 (NOLOAD) :

  {

    [ .stabstr ]

  }

  /* 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) }

  .debug_ranges   0 : { *(.debug_ranges) }

  /* 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  .  */

}