diff options
author | Peter Wemm <peter@FreeBSD.org> | 2002-07-20 19:22:10 +0000 |
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committer | Peter Wemm <peter@FreeBSD.org> | 2002-07-20 19:22:10 +0000 |
commit | 7657553c76c0dbf8a60e4ecd6fec012cfbacf63d (patch) | |
tree | 40c00dfdf64818e7ab9ddcb5b4b1ea788654d676 /lib | |
parent | 67b455bda44fa7ef788f1a29826955e67546cbea (diff) | |
download | src-7657553c76c0dbf8a60e4ecd6fec012cfbacf63d.tar.gz src-7657553c76c0dbf8a60e4ecd6fec012cfbacf63d.zip |
Add an ia64 atomic lock primitive for libc_r. This is mostly for
completeness and doesn't get us a working libc_r there because libc_r
uses setjmp() and setjmp() cannot be used for context switches on ia64
as-is (or sparc64). Rather than making setjmp/longjmp behave like
the *context() calls, it would be far better to make libc_r use *context()
directly which is what they are for.
Obtained from: marcel
Notes
Notes:
svn path=/head/; revision=100409
Diffstat (limited to 'lib')
-rw-r--r-- | lib/libc_r/arch/ia64/_atomic_lock.S | 48 | ||||
-rw-r--r-- | lib/libpthread/arch/ia64/ia64/_atomic_lock.S | 48 |
2 files changed, 96 insertions, 0 deletions
diff --git a/lib/libc_r/arch/ia64/_atomic_lock.S b/lib/libc_r/arch/ia64/_atomic_lock.S new file mode 100644 index 000000000000..836b3751abb0 --- /dev/null +++ b/lib/libc_r/arch/ia64/_atomic_lock.S @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2002 Marcel Moolenaar + * All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + * + * $FreeBSD$ + */ + +#if defined(LIBC_RCS) && !defined(lint) + .text + .asciz "$FreeBSD$" +#endif /* LIBC_RCS and not lint */ + +#include <machine/asm.h> + +/* + * Atomicly lock a location with an identifier provided the location + * is not currently locked. + * + * long _atomic_lock(long *); + * eax will contain the return value (zero if lock obtained). + */ +ENTRY(_atomic_lock, 1) + add r14 = 1, r0 + ;; + xchg8 r8 = [r32], r14 + br.ret.sptk rp +END(_atomic_lock) diff --git a/lib/libpthread/arch/ia64/ia64/_atomic_lock.S b/lib/libpthread/arch/ia64/ia64/_atomic_lock.S new file mode 100644 index 000000000000..836b3751abb0 --- /dev/null +++ b/lib/libpthread/arch/ia64/ia64/_atomic_lock.S @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2002 Marcel Moolenaar + * All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + * + * $FreeBSD$ + */ + +#if defined(LIBC_RCS) && !defined(lint) + .text + .asciz "$FreeBSD$" +#endif /* LIBC_RCS and not lint */ + +#include <machine/asm.h> + +/* + * Atomicly lock a location with an identifier provided the location + * is not currently locked. + * + * long _atomic_lock(long *); + * eax will contain the return value (zero if lock obtained). + */ +ENTRY(_atomic_lock, 1) + add r14 = 1, r0 + ;; + xchg8 r8 = [r32], r14 + br.ret.sptk rp +END(_atomic_lock) |