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authorJoel Sherrill <joel.sherrill@OARcorp.com>2008-03-22 14:01:49 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>2008-03-22 14:01:49 +0000
commit3f432fbd018ee684a4f6e760eff901ea463ccb0b (patch)
tree5a18ac85ab25e0b6bd3add3f7f974151c2012564 /c/src/lib/libbsp/i386/pc386/startup/linkcmds
parentFix package name. (diff)
downloadrtems-3f432fbd018ee684a4f6e760eff901ea463ccb0b.tar.bz2
2008-03-22 Joel Sherrill <joel.sherrill@oarcorp.com>
* configure.ac, startup/exit.c: Add BSP_PRESS_KEY_FOR_RESET configuration option. When this is set to one, a clean exit of an application will result in the BSP resetting the hardware without waiting for a human to press a key. * start/start.S, startup/linkcmds: Replace the linkcmds with a version very closely based upon the default in binutils 2.18 for this target. This eliminated weird failures with C++ dtors even in C applications. We had an extra _ on a symbol used in start.S.
Diffstat (limited to 'c/src/lib/libbsp/i386/pc386/startup/linkcmds')
-rw-r--r--c/src/lib/libbsp/i386/pc386/startup/linkcmds281
1 files changed, 177 insertions, 104 deletions
diff --git a/c/src/lib/libbsp/i386/pc386/startup/linkcmds b/c/src/lib/libbsp/i386/pc386/startup/linkcmds
index 96de268523..aeb347af0c 100644
--- a/c/src/lib/libbsp/i386/pc386/startup/linkcmds
+++ b/c/src/lib/libbsp/i386/pc386/startup/linkcmds
@@ -1,54 +1,72 @@
-/*-------------------------------------------------------------------------+
-| linkcmds v1.1 - PC386 BSP - 1997/08/07
-+--------------------------------------------------------------------------+
-| This file contains directives for the GNU linker which are specific to the
-| PC386 bsp.
-+--------------------------------------------------------------------------+
-| (C) Copyright 1997 -
-| - NavIST Group - Real-Time Distributed Systems and Industrial Automation
-|
-| http://pandora.ist.utl.pt
-|
-| Instituto Superior Tecnico * Lisboa * PORTUGAL
-+--------------------------------------------------------------------------+
-| Disclaimer:
-|
-| This file is provided "AS IS" without warranty of any kind, either
-| expressed or implied.
-+--------------------------------------------------------------------------+
-| This code is based on:
-| linkcmds,v 1.3 1995/12/19 20:06:58 joel Exp - FORCE CPU386 BSP
-| With the following copyright notice:
-| **************************************************************************
-| * COPYRIGHT (c) 1989-1999.
-| * On-Line Applications Research Corporation (OAR).
-| *
-| * The license and distribution terms for this file may be
-| * found in found in the file LICENSE in this distribution or at
-| * http://www.rtems.com/license/LICENSE.
-| **************************************************************************
-|
-| $Id$
-+--------------------------------------------------------------------------*/
-
+/*
+ * Copy of default "default linker script, for normal executables"
+ * provided with binutils 2.18 with minor modifications for use
+ * as pc386 linkcmds. These changes include:
+ *
+ * + sections commented out marked with "XXX commented out --joel"
+ * + addition of m_hdr section
+ * + addition of FreeBSD sysctl sections
+ *
+ * $Id$
+ */
+/*
+ * XXX commented out --joel
+OUTPUT_FORMAT("elf32-i386", "elf32-i386",
+ "elf32-i386")
+OUTPUT_ARCH(i386)
+ENTRY(_start)
+*/
SECTIONS
{
-/* .m_hdr :
- {
- . = ALIGN(4);
- *(.m_hdr)
- }
+ /* Read-only sections, merged into text segment: */
+/*
+ * XXX commented out --joel
+ PROVIDE (__executable_start = 0x08048000); . = 0x08048000 + SIZEOF_HEADERS;
*/
- .text :
+ .interp : { *(.interp) }
+ .note.gnu.build-id : { *(.note.gnu.build-id) }
+ .hash : { *(.hash) }
+ .gnu.hash : { *(.gnu.hash) }
+ .dynsym : { *(.dynsym) }
+ .dynstr : { *(.dynstr) }
+ .gnu.version : { *(.gnu.version) }
+ .gnu.version_d : { *(.gnu.version_d) }
+ .gnu.version_r : { *(.gnu.version_r) }
+ .rel.init : { *(.rel.init) }
+ .rela.init : { *(.rela.init) }
+ .rel.text : { *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) }
+ .rela.text : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) }
+ .rel.fini : { *(.rel.fini) }
+ .rela.fini : { *(.rela.fini) }
+ .rel.rodata : { *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) }
+ .rela.rodata : { *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) }
+ .rel.data.rel.ro : { *(.rel.data.rel.ro* .rel.gnu.linkonce.d.rel.ro.*) }
+ .rela.data.rel.ro : { *(.rela.data.rel.ro* .rela.gnu.linkonce.d.rel.ro.*) }
+ .rel.data : { *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*) }
+ .rela.data : { *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*) }
+ .rel.tdata : { *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*) }
+ .rela.tdata : { *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*) }
+ .rel.tbss : { *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*) }
+ .rela.tbss : { *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*) }
+ .rel.ctors : { *(.rel.ctors) }
+ .rela.ctors : { *(.rela.ctors) }
+ .rel.dtors : { *(.rel.dtors) }
+ .rela.dtors : { *(.rela.dtors) }
+ .rel.got : { *(.rel.got) }
+ .rela.got : { *(.rela.got) }
+ .rel.bss : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) }
+ .rela.bss : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) }
+ .rel.plt : { *(.rel.plt) }
+ .rela.plt : { *(.rela.plt) }
+ .plt : { *(.plt) }
+ .text :
{
- _text_start = . ;
- . = ALIGN(4);
- *(.m_hdr)
- *(.text)
- *(.text.*)
- . = ALIGN (16);
-
+ *(.m_hdr)
+ *(.text .stub .text.* .gnu.linkonce.t.*)
+ KEEP (*(.text.*personality*))
+ /* .gnu.warning sections are handled specially by elf32.em. */
+ *(.gnu.warning)
/*
* Special FreeBSD sysctl sections.
*/
@@ -59,94 +77,149 @@ SECTIONS
*(set_domain_*);
*(set_pseudo_*);
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- 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__ = .;
+ } =0x90909090
- _rodata_start = . ;
- *(.rodata*)
- *(.gnu.linkonce.r*)
- _erodata = ALIGN( 0x10 ) ;
-
- *(.jcr)
- _etext = ALIGN( 0x10 ) ;
+ .init :
+ {
+ KEEP (*(.init))
+ } =0x90909090
+ .fini :
+ {
+ KEEP (*(.fini))
+ } =0x90909090
+ PROVIDE (__etext = .);
+ PROVIDE (_etext = .);
+ PROVIDE (etext = .);
+ .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
+ .rodata1 : { *(.rodata1) }
+ .eh_frame_hdr : { *(.eh_frame_hdr) }
+ .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }
+ .gcc_except_table : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) }
+ /* Adjust the address for the data segment. We want to adjust up to
+ the same address within the page on the next page up. */
+ . = ALIGN (CONSTANT (MAXPAGESIZE)) - ((CONSTANT (MAXPAGESIZE) - .) & (CONSTANT (MAXPAGESIZE) - 1)); . = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE));
+ /* Exception handling */
+ .eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) }
+ .gcc_except_table : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) }
+ /* Thread Local Storage sections */
+ .tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
+ .tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
+ .preinit_array :
+ {
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP (*(.preinit_array))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
}
-
- .init : { *(.init) } = 0x9090
- .fini : { *(.fini) } = 0x9090
- .data ADDR( .fini ) + SIZEOF( .fini ):
+ .init_array :
{
- _data_start = . ;
- *(.data)
- *(.data.*)
- *(.gnu.linkonce.d*)
- *(.gcc_except_table*)
- _edata = ALIGN( 0x10 ) ;
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ PROVIDE_HIDDEN (__init_array_end = .);
}
-
- .bss ADDR( .data ) + SIZEOF( .data ):
+ .fini_array :
{
- _bss_start = . ;
- *(.bss)
- *(.bss.*)
- *(COMMON)
- _end = . ;
- __end = . ;
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP (*(.fini_array))
+ KEEP (*(SORT(.fini_array.*)))
+ PROVIDE_HIDDEN (__fini_array_end = .);
}
-
+ .ctors :
+ {
+ /* gcc uses crtbegin.o to find the start of
+ the constructors, so we make sure it is
+ first. Because this is a wildcard, it
+ doesn't matter if the user does not
+ actually link against crtbegin.o; the
+ linker won't look for a file to match a
+ wildcard. The wildcard also means that it
+ doesn't matter which directory crtbegin.o
+ is in. */
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*crtbegin?.o(.ctors))
+ /* We don't want to include the .ctor section from
+ the crtend.o file until after the sorted ctors.
+ The .ctor section from the crtend file contains the
+ end of ctors marker and it must be last */
+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*(.ctors))
+ }
+ .dtors :
+ {
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*crtbegin?.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*(.dtors))
+ }
+ .jcr : { KEEP (*(.jcr)) }
+ .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*) }
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+ .got : { *(.got) }
+ . = DATA_SEGMENT_RELRO_END (12, .);
+ .got.plt : { *(.got.plt) }
+ .data :
+ {
+ *(.data .data.* .gnu.linkonce.d.*)
+ KEEP (*(.gnu.linkonce.d.*personality*))
+ SORT(CONSTRUCTORS)
+ }
+ .data1 : { *(.data1) }
+ _edata = .; PROVIDE (edata = .);
+ __bss_start = .;
+ .bss :
+ {
+ *(.dynbss)
+ *(.bss .bss.* .gnu.linkonce.b.*)
+ *(COMMON)
+ /* Align here to ensure that the .bss section occupies space up to
+ _end. Align after .bss to ensure correct alignment even if the
+ .bss section disappears because there are no input sections.
+ FIXME: Why do we need it? When there is no .bss section, we don't
+ pad the .data section. */
+ . = ALIGN(. != 0 ? 32 / 8 : 1);
+ }
+ . = ALIGN(32 / 8);
+ . = ALIGN(32 / 8);
+ _end = .; PROVIDE (end = .);
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}
-