Subversion Repositories openrisc_2011-10-31

/* Linker script for running ELF programs in the Sparc simulator */

/* OUTPUT_FORMAT("elf32-sparc", "elf32-sparc", "elf32-sparcle") */

/* OUTPUT_FORMAT("elf32-sparc") */

OUTPUT_ARCH(sparc)

STARTUP(traps.o)

INPUT(erc32-crt0.o)

ENTRY(_trap_table)

GROUP(-lc -lerc32 -lgcc)  /*  -lerc32 used to be -lsim */

SEARCH_DIR(.)

/* Do we need any of these for elf?

   __DYNAMIC = 0;    */

/*

 * 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

 */

/*

 * User modifiable values:

 *

 * _CLOCK_SPEED               in Mhz (used to program the counter/timers)

 *

 * _PROM_SIZE                 size of PROM (permissible values are 4K, 8K, 16K

 *                               32K, 64K, 128K, 256K, and 512K)

 * _RAM_SIZE                  size of RAM (permissible values are 256K, 512K,

 *                               1MB, 2Mb, 4Mb, 8Mb, 16Mb, and 32Mb)

 *

 * These symbols are only used in assembler code, so they only need to

 * be listed once. They should always be refered to without SYM().

 */

_CLOCK_SPEED = 10;

_PROM_SIZE = 4M;

_RAM_SIZE = 256K;

_RAM_START = 0x02000000;

_RAM_END = _RAM_START + _RAM_SIZE;

_STACK_SIZE = (16 * 1024);

_PROM_START = 0x00000000;

_PROM_END = _PROM_START + _PROM_SIZE;

/*

 *  Base address of the on-CPU peripherals

 */

_ERC32_MEC = 0x01f80000;

/*

 * Setup the memory map for the SIS simulator.

 * stack grows up towards low memory.

 */

MEMORY

{

  rom       : ORIGIN = 0x00000000, LENGTH = 4M

  ram (rwx) : ORIGIN = 0x02000000, 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.

 */

SECTIONS

{

  .text      :

  {

    _stext = .;

    PROVIDE (stext = .);

    *(.text)

    _etext = .;

    PROVIDE (etext = .);

    /* For a.out.  */

    CONSTRUCTORS

    /* For ELF.  */

    __CTOR_LIST__ = .;

    LONG(-1)

    KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))

    KEEP (*(SORT(.ctors.*)))

    KEEP (*crtend.o(.ctors))

    LONG(0)

    __CTOR_END__ = .;

    __DTOR_LIST__ = .;

    LONG(-1)

    KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))

    KEEP (*(SORT(.dtors.*)))

    KEEP (*crtend.o(.dtors))

    LONG(0)

    __DTOR_END__ = .;

    *(.init)

    *(.lit)

    *(.rodata)

    *(.shdata)

    __EH_FRAME_BEGIN__ = .;

    *(.eh_frame)

    *(.gnu.linkonce.t*)

    *(.gnu.linkonce.r*)

    *(.gcc_except_table)

    *(.fini)

    _endtext = .;

    PROVIDE(endtext = .);

  } > ram

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

  {

    *(.shbss)

  }

  .talias : { }  > ram

  .data    :

  {

    _sdata  =  .;

    PROVIDE (sdata  =  .);

    *(.data)

    *(.data.*)

    *(.gnu.linkonce.d*)

    _edata  =  .;

    PROVIDE (edata  =  .);

  } > ram

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

  {

    _sbss = . ;

    PROVIDE (sbss = . );

    __bss_start = ALIGN(0x8);

    *(.bss)

    *(COMMON)

    _ebss = .;

    PROVIDE (ebss = .);

    _end = ALIGN(0x8);

    __end = ALIGN(0x8);

    PROVIDE (end = ALIGN(0x8));

  }

  /* 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) }

  .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  .  */

}