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Rename gnu-nxflat.ld to gnu-nxflat-gotoff.ld; Add gnu-nxflat-pcrel.ld
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5225 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
@@ -0,0 +1,182 @@
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/****************************************************************************
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* examples/nxflat/gnu-nxflat-gotoff.ld
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*
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* Copyright (C) 2009, 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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MEMORY
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{
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ISPACE : ORIGIN = 0x0, LENGTH = 2097152
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DSPACE : ORIGIN = 0x0, LENGTH = 2097152
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}
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/****************************************************************************
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* The XFLAT program image is divided into two segments:
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*
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* (1) ISpace (Instruction Space). This is the segment that contains
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* code (.text). Everything in the segment should be fetch-able
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* machine PC instructions (jump, branch, call, etc.).
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* (2) DSpace (Data Space). This is the segment that contains both
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* read-write data (.data, .bss) as well as read-only data (.rodata).
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* Everything in this segment should be access-able with machine
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* PIC load and store instructions.
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*
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* Older versions of GCC (at least up to GCC 4.3.3), use GOT-relative
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* addressing to access RO data. In that case, read-only data (.rodata) must
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* reside in D-Space and this linker script should be used.
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*
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* Newer versions of GCC (at least as of GCC 4.6.3), use PC-relative
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* addressing to access RO data. In that case, read-only data (.rodata) must
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* reside in I-Space and this linker script should NOT be used with those
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* newer tools.
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*
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****************************************************************************/
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SECTIONS
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{
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.text 0x00000000 :
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{
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/* ISpace is located at address 0. Every (unrelocated) ISpace
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* address is an offset from the begining of this segment.
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*/
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text_start = . ;
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*(.text)
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*(.text.*)
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*(.gnu.warning)
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*(.stub)
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*(.glue_7)
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*(.glue_7t)
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*(.jcr)
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/* C++ support: The .init and .fini sections contain XFLAT-
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* specific logic to manage static constructors and destructors.
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*/
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*(.gnu.linkonce.t.*)
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*(.init)
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*(.fini)
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/* This is special code area at the end of the normal
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text section. It contains a small lookup table at
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the start followed by the code pointed to by entries
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in the lookup table. */
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. = ALIGN (4) ;
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PROVIDE(__ctbp = .);
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*(.call_table_data)
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*(.call_table_text)
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_etext = . ;
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} > ISPACE
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/* DSpace is also located at address 0. Every (unrelocated) DSpace
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* address is an offset from the begining of this segment.
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*/
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.data 0x00000000 :
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{
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__data_start = . ;
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*(.rodata)
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*(.rodata1)
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*(.rodata.*)
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*(.gnu.linkonce.r*)
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*(.data)
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*(.data1)
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*(.data.*)
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*(.gnu.linkonce.d*)
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*(.data1)
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*(.eh_frame)
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*(.gcc_except_table)
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*(.gnu.linkonce.s.*)
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*(__libc_atexit)
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*(__libc_subinit)
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*(__libc_subfreeres)
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*(.note.ABI-tag)
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/* C++ support. For each global and static local C++ object,
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* GCC creates a small subroutine to construct the object. Pointers
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* to these routines (not the routines themselves) are stored as
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* simple, linear arrays in the .ctors section of the object file.
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* Similarly, pointers to global/static destructor routines are
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* stored in .dtors.
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*/
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*(.gnu.linkonce.d.*)
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_ctors_start = . ;
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*(.ctors)
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_ctors_end = . ;
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_dtors_start = . ;
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*(.dtors)
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_dtors_end = . ;
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_edata = . ;
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edata = ALIGN( 0x10 ) ;
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} > DSPACE
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.bss :
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{
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__bss_start = _edata ;
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*(.dynsbss)
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*(.sbss)
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*(.sbss.*)
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*(.scommon)
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*(.dynbss)
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*(.bss)
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*(.bss.*)
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*(.bss*)
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*(.gnu.linkonce.b*)
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*(COMMON)
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end = ALIGN( 0x10 ) ;
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_end = ALIGN( 0x10 ) ;
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} > DSPACE
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.got 0 : { *(.got.plt) *(.got) }
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.junk 0 : { *(.rel*) *(.rela*) }
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_info 0 : { *(.debug_info) }
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.debug_line 0 : { *(.debug_line) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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.debug_aranges 0 : { *(.debug_aranges) }
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}
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