diff options
Diffstat (limited to 'lib/librthread/arch/vax/rfork_thread.S')
| -rw-r--r-- | lib/librthread/arch/vax/rfork_thread.S | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/lib/librthread/arch/vax/rfork_thread.S b/lib/librthread/arch/vax/rfork_thread.S new file mode 100644 index 00000000000..c6fdc602079 --- /dev/null +++ b/lib/librthread/arch/vax/rfork_thread.S @@ -0,0 +1,69 @@ +/* $OpenBSD: rfork_thread.S,v 1.1 2005/12/23 19:52:04 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/vax/SYS.h" + +/* + * int rfork_thread(int flags, void *stack, void (*func)(void *), void *arg); + */ +ENTRY(rfork_thread, R2|R3|R4) + /* + * Save thread creation arguments into registers. + */ + movl 8(ap), r2 /* stack */ + movl 12(ap), r3 /* func */ + movl 16(ap), r4 /* arg */ + + __DO_SYSCALL(rfork) + jcs 9f + + cmpl r0, $0 + beql 1f + + /* + * In parent process: just return. + */ + ret + +1: + /* + * In child process: switch stack, invoke function, then exit. + * Note that since we can not pass a register to calls, we need + * to waste 4 bytes of stack in every thread. + */ + movl r2, sp /* stack */ + pushl r3 /* func */ + pushl r4 /* arg */ + calls $1, *4(sp) /* func */ + + __DO_SYSCALL(threxit) + +9: + /* + * system call failed. + */ + jmp __cerror |