linkram

一个航天航空用的Sparc处理器（配美国欧洲宇航局用的R_tems嵌入式操作系统）的VHDL源代码

/*
 *uncomment this if you want the linker to output srecords.
OUTPUT_FORMAT(srec)
 *
 */
OUTPUT_ARCH(sparc)
SEARCH_DIR(/usr/local/erc32/sparc-erc32-aout/lib)
SEARCH_DIR(/usr/local/erc32/lib/gcc-lib/sparc-aout/2.7.2)
__DYNAMIC  =  0;
ENTRY(start)
 
/*
 * The memory map looks like this:
 * +--------------------+ <- low memory
 * | .text              |
 * |        etext       |
 * |        ctor list   | the ctor and dtor lists are for
 * |        dtor list   | C++ support
 * |        _endtext    |
 * +--------------------+
 * | .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)
 *
 *  MAKE SURE THESE MATCH THE MEMORY DESCRIPTION SECTION!!!
 */
 
MEMORY
{
  rom     : ORIGIN = 0x00000000, LENGTH = 4M
  ram     : ORIGIN = 0x08000000, LENGTH = 2M
}
 
/*
 * stick everything in ram (of course)
 */
SECTIONS
{
  .text :
  {
    CREATE_OBJECT_SYMBOLS
    text_start = .;
    _text_start = .;
    *(.text)
    etext = ALIGN(0x10);
    _etext = .;
    *(.lit)
    *(.shdata)
    _endtext = .;
  } > ram
  .dynamic        : { *(.dynamic)       } >ram
  .got            : { *(.got)           } >ram
  .plt            : { *(.plt)           } >ram
  .hash           : { *(.hash)          } >ram
  .dynrel         : { *(.dynrel)        } >ram
  .dynsym         : { *(.dynsym)        } >ram
  .dynstr         : { *(.dynstr)        } >ram
  .hash           : { *(.hash)          } >ram
  .data :
  {
    data_start = .;
    _data_start = .;
    _sdata = . ;
    *(.data)
    edata = ALIGN(0x10);
    _edata = .;
  } > ram
  .shbss :
  {
    *(.shbss)
  } > ram
  .bss :
  {
    __bss_start = ALIGN(0x8);
    _bss_start = .;
    bss_start = .;
    *(.bss)
    *(COMMON)
    end = .;
    _end = ALIGN(0x8);
    __end = ALIGN(0x8);
  } > ram
  .stab . (NOLOAD) :
  {
    [ .stab ]
  }
  .stabstr . (NOLOAD) :
  {
    [ .stabstr ]
  }
}