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 -lslite931 -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  .  */
}