diff options
Diffstat (limited to 'lib/librthread/arch/sparc64/rfork_thread.S')
| -rw-r--r-- | lib/librthread/arch/sparc64/rfork_thread.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/lib/librthread/arch/sparc64/rfork_thread.S b/lib/librthread/arch/sparc64/rfork_thread.S new file mode 100644 index 00000000000..f6b1788a8d5 --- /dev/null +++ b/lib/librthread/arch/sparc64/rfork_thread.S @@ -0,0 +1,72 @@ +/* $OpenBSD: rfork_thread.S,v 1.1 2005/12/25 16:21:01 miod Exp $ */ + +/* + * Copyright (c) 2005, Miodrag Vallat + * + * 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. + */ + +#include "../../../libc/arch/sparc64/SYS.h" + +/* + * int rfork_thread(int flags, void *stack, void (*func)(void *), void *arg); + */ +ENTRY(rfork_thread) + mov %o1, %o4 /* save stack */ + + /* + * We can not invoke rfork as a G2-style system call since we want + * different return paths. + */ + mov SYS_rfork, %g1 + t ST_SYSCALL + bcs 9f + nop + + cmp %o0, 0 + be 1f + nop + + /* + * In parent process: just return. + */ + retl + nop + +1: + /* + * In child process: switch stack, invoke function, then exit. + */ + + sub %o4, (BIAS + 128), %sp /* stack */ + call %o2 /* func */ + mov %o3, %o0 /* arg */ + + mov SYS_threxit, %g1 + clr %o0 + t ST_SYSCALL /* will not return */ + +9: + /* + * System call failure. + */ + ERROR() |