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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [efi68k/] [startup/] [linkcmds] - Blame information for rev 173

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1 30 unneback 
/*  linkcmds
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 *
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 *  $Id: linkcmds,v 1.2 2001-09-27 12:00:03 chris Exp $
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 */
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OUTPUT_ARCH(m68k)
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__DYNAMIC  =  0;
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/*
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 * The memory map looks like this:
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 * +--------------------+ <- low memory
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 * | .text              |
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 * |        etext       |
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 * |        ctor list   | the ctor and dtor lists are for
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 * |        dtor list   | C++ support
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 * |        _endtext    |
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 * +--------------------+
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 * | .data              | initialized data goes here
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 * |        _sdata      |
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 * |        _edata      |
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 * +--------------------+
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 * | .bss               |
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 * |        _clear_start| start of bss, cleared by crt0
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 * |        _end        | start of heap, used by sbrk()
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 * +--------------------+
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 * |    heap space      |
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 * |        _ENDHEAP    |
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 * |    stack space     |
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 * |        __stack     | top of stack
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 * +--------------------+ <- high memory
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 */
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/*
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 * User modifiable values:
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 *
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 * _VBR                 location of VBR table
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 */
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MEMORY
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{
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  ram     : ORIGIN = 0x203000, LENGTH = 256K
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}
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_VBR = 0x200000;                /* location of the VBR table (in RAM) */
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__end_of_ram = 0x240000;
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_copy_data_from_rom = 0;
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/*
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 * Declare some sizes.
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 */
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_RamBase = DEFINED(_RamBase) ? _RamBase : 0x200000;
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_RamSize = DEFINED(_RamSize) ? _RamSize : 256K;
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_HeapSize = DEFINED(_HeapSize) ? _HeapSize : 0x10000;
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_StackSize = DEFINED(_StackSize) ? _StackSize : 0x1000;
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/*
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 * stick everything in ram (of course)
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 */
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SECTIONS
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{
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        ram : {
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                . = .;
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        } >ram
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        /*
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         * Text, data and bss segments
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         */
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        .text : {
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                *(.text)
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                /*
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                 * C++ constructors/destructors
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                 */
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                *(.gnu.linkonce.t.*)
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                /*
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                 * Initialization and finalization code.
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                 *
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                 * Various files can provide initialization and finalization
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                 * functions.  crtbegin.o and crtend.o are two instances. The
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                 * body of these functions are in .init and .fini sections. We
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                 * accumulate the bodies here, and prepend function prologues
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                 * from crti.o and function epilogues from crtn.o. crti.o must
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                 * be linked first; crtn.o must be linked last.  Because these
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                 * are wildcards, it doesn't matter if the user does not
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                 * actually link against crti.o and crtn.o; the linker won't
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                 * look for a file to match a wildcard.  The wildcard also
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                 * means that it doesn't matter which directory crti.o and
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                 * crtn.o are in.
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                 */
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                PROVIDE (_init = .);
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                *crti.o(.init)
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                *(.init)
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                *crtn.o(.init)
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                PROVIDE (_fini = .);
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                *crti.o(.fini)
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                *(.fini)
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                *crtn.o(.fini)
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                /*
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                 * C++ constructors/destructors
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                 *
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                 * gcc uses crtbegin.o to find the start of the constructors
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                 * and destructors so we make sure it is first.  Because this
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                 * is a wildcard, it doesn't matter if the user does not
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                 * actually link against crtbegin.o; the linker won't look for
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                 * a file to match a wildcard.  The wildcard also means that
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                 * it doesn't matter which directory crtbegin.o is in. The
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                 * constructor and destructor list are terminated in
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                 * crtend.o.  The same comments apply to it.
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                 */
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                . = ALIGN (16);
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                *crtbegin.o(.ctors)
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                *(.ctors)
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                *crtend.o(.ctors)
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                *crtbegin.o(.dtors)
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                *(.dtors)
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                *crtend.o(.dtors)
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                /*
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                 * Exception frame info
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                 */
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                . = ALIGN (16);
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                *(.eh_frame)
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                /*
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                 * Read-only data
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                 */
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                . = ALIGN (16);
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                _rodata_start = . ;
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                *(.rodata)
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                *(.gnu.linkonce.r*)
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                 . = ALIGN (16);
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                PROVIDE (_etext = .);
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        } >ram
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        .data : {
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                PROVIDE (_copy_start = .);
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                *(.data)
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                *(.gnu.linkonce.d*)
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                *(.gcc_except_table)
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                . = ALIGN (16);
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                PROVIDE (_edata = .);
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                PROVIDE (_copy_end = .);
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        } >ram
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        .bss : {
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                _clear_start = .;
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                *(.bss)
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                *(COMMON)
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                . = ALIGN (16);
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                PROVIDE (end = .);
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                . += _StackSize;
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                . = ALIGN (16);
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                _stack_init = .;
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                _clear_end = .;
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                _WorkspaceBase = .;
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        } >ram
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}

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