px4-firmware/nuttx/configs/sam3u-ek/knsh/ld.script

/****************************************************************************
 * configs/sam3u-ek/knsh/ld.script
 *
 *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/* The AT91SAM3U-4 has 256Kb of FLASH beginning at address 0x0008:0000, 
 * 32Kb of SRAM beginning at address 0x2000:0000, and 16Kb of SRAM beginning
 * at address 0x2008:000 (used only for heap).  When booting from FLASH,
 * FLASH memory is aliased to address 0x0000:0000 where the code expects to
 * begin execution by jumping to the entry point in the 0x0800:0000 address
 * range.
 *
 * For MPU support, the kernel-mode NuttX section is assumed to be 64Kb of
 * FLASH and 4Kb of SRAM.  That, of course, can be optimized as needed (See
 * also configs/sam3u-ek/kernel/kernel.ld.
 */

MEMORY
{
    /* 256Kb FLASH */

    kflash (rx)  : ORIGIN = 0x00080000, LENGTH = 64K
    uflash (rx)  : ORIGIN = 0x00090000, LENGTH = 192K

    /* 32Kb SRAM */

    ksram1 (rwx) : ORIGIN = 0x20000000, LENGTH = 4K
    usram1 (rwx) : ORIGIN = 0x20001000, LENGTH = 28K

    /* 16Kb SRAM */

    sram2 (rwx) : ORIGIN = 0x20080000, LENGTH = 16K
}

OUTPUT_ARCH(arm)
ENTRY(_stext)
SECTIONS
{
	.text : {
		_stext = ABSOLUTE(.);
		*(.vectors)
		*(.text .text.*)        
		*(.fixup)
		*(.gnu.warning)
		*(.rodata .rodata.*)        
		*(.gnu.linkonce.t.*)
		*(.glue_7)
		*(.glue_7t)
		*(.got)
		*(.gcc_except_table)
		*(.gnu.linkonce.r.*)
		_etext = ABSOLUTE(.);
	} > kflash

	_eronly = ABSOLUTE(.);

	.data : {
		_sdata = ABSOLUTE(.);
		*(.data .data.*)
		*(.gnu.linkonce.d.*)
		CONSTRUCTORS
		_edata = ABSOLUTE(.);
	} > ksram1 AT > kflash

	.ARM.extab : {
		*(.ARM.extab*)
	} >ksram1

	.ARM.exidx : {
		__exidx_start = ABSOLUTE(.);
		*(.ARM.exidx*)
		__exidx_end = ABSOLUTE(.);
	} >ksram1

	.bss : {
		_sbss = ABSOLUTE(.);
		*(.bss .bss.*)
		*(.gnu.linkonce.b.*)
		*(COMMON)
		_ebss = ABSOLUTE(.);
	} > ksram1

	/* 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) }
	.debug_abbrev 0 : { *(.debug_abbrev) }
	.debug_info 0 : { *(.debug_info) }
	.debug_line 0 : { *(.debug_line) }
	.debug_pubnames 0 : { *(.debug_pubnames) }
	.debug_aranges 0 : { *(.debug_aranges) }
}