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[libatomic] Add RTEMS support

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gcc/
    
	* config/rtems.h (LIB_SPEC): Add -latomic.
    
libatomic/
    
	* configure.tgt (configure_tgt_pre_target_cpu_XCFLAGS): New
	* variable.
	(*-*-rtems*): New supported target.
	* config/rtems/host-config.h: New file.
	* config/rtems/lock.c: Likewise.

From-SVN: r236020
This commit is contained in:
Sebastian Huber 2016-05-09 06:13:05 +00:00 committed by Sebastian Huber
parent 1911f31602
commit d6e115fcd0
6 changed files with 105 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2016-05-09 Sebastian Huber <sebastian.huber@embedded-brains.de>
Backport from mainline
2016-04-27 Sebastian Huber <sebastian.huber@embedded-brains.de>
* config/rtems.h (LIB_SPEC): Add -latomic.
2016-05-09 Sebastian Huber <sebastian.huber@embedded-brains.de>
Backport from mainline

2
gcc/config/rtems.h
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@ -45,6 +45,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
#define LIB_SPEC "%{!qrtems: " STD_LIB_SPEC "} " \
"%{!nostdlib: %{qrtems: --start-group \
-lrtemsbsp -lrtemscpu \
-lc -lgcc --end-group %{!qnolinkcmds: -T linkcmds%s}}}"
-latomic -lc -lgcc --end-group %{!qnolinkcmds: -T linkcmds%s}}}"
#define TARGET_POSIX_IO

10
libatomic/ChangeLog
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@ -1,3 +1,13 @@
2016-05-09 Sebastian Huber <sebastian.huber@embedded-brains.de>
Backport from mainline:
2016-04-27 Sebastian Huber <sebastian.huber@embedded-brains.de>
* configure.tgt (configure_tgt_pre_target_cpu_XCFLAGS): New variable.
(*-*-rtems*): New supported target.
* config/rtems/host-config.h: New file.
* config/rtems/lock.c: Likewise.
2016-01-06 Szabolcs Nagy <szabolcs.nagy@arm.com>
Backport from mainline:

41
libatomic/config/rtems/host-config.h Normal file
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@ -0,0 +1,41 @@
/* Copyright (C) 2016 Free Software Foundation, Inc.
Contributed by Sebastian Huber <sebastian.huber@embedded-brains.de>.
This file is part of the GNU Atomic Library (libatomic).
Libatomic is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* Included after all more target-specific host-config.h. */
#include <machine/_libatomic.h>
static inline UWORD
protect_start (void *ptr)
{
return _Libatomic_Protect_start (ptr);
}
static inline void
protect_end (void *ptr, UWORD isr_level)
{
_Libatomic_Protect_end (ptr, isr_level);
}
#include_next <host-config.h>

37
libatomic/config/rtems/lock.c Normal file
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@ -0,0 +1,37 @@
/* Copyright (C) 2016 Free Software Foundation, Inc.
Contributed by Sebastian Huber <sebastian.huber@embedded-brains.de>.
This file is part of the GNU Atomic Library (libatomic).
Libatomic is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libatomic_i.h"
void
libat_lock_n (void *ptr, size_t n)
{
_Libatomic_Lock_n (ptr, n);
}
void
libat_unlock_n (void *ptr, size_t n)
{
_Libatomic_Unlock_n (ptr, n);
}

9
libatomic/configure.tgt
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@ -26,6 +26,10 @@
# Map the target cpu to an ARCH sub-directory. At the same time,
# work out any special compilation flags as necessary.
# Give operating systems the opportunity to discard XCFLAGS modifications based
# on ${target_cpu}. For example to allow proper use of multilibs.
configure_tgt_pre_target_cpu_XCFLAGS="${XCFLAGS}"
case "${target_cpu}" in
alpha*) ARCH=alpha ;;
rs6000 | powerpc*) ARCH=powerpc ;;
@ -108,6 +112,11 @@ case "${target}" in
config_path="${config_path} posix"
;;
*-*-rtems*)
XCFLAGS="${configure_tgt_pre_target_cpu_XCFLAGS}"
config_path="rtems"
;;
*-*-elf*)
# ??? No target OS. We could be targeting bare-metal kernel-mode,
# or user-mode for some custom OS. If the target supports TAS,