diff options
Diffstat (limited to 'lib/libc/arch/powerpc/sys/tfork_thread.S')
| -rw-r--r-- | lib/libc/arch/powerpc/sys/tfork_thread.S | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/lib/libc/arch/powerpc/sys/tfork_thread.S b/lib/libc/arch/powerpc/sys/tfork_thread.S new file mode 100644 index 00000000000..2e9a46a7664 --- /dev/null +++ b/lib/libc/arch/powerpc/sys/tfork_thread.S @@ -0,0 +1,53 @@ +/* $OpenBSD: tfork_thread.S,v 1.1 2012/03/22 00:44:56 guenther Exp $ */ + +/* + * Copyright (c) 2005 Tim Wiess <tim@nop.cx> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <sys/syscall.h> +#include <machine/asm.h> + +ENTRY(__tfork_thread) + /* sanity check */ + cmpwi %r4, 0 + beq 1f + cmpwi %r5, 0 + beq 1f + + mr %r7,%r4 + + /* call __tfork */ + li %r0, SYS___tfork + sc + cmpwi %r0, 0 + bne 2f + + /* check if we are parent or child */ + cmpwi %r3, 0 + bnelr + + /* child */ + mtlr %r5 /* fp */ + mr %r3, %r6 /* arg */ + subi %r1, %r7, 16 /* fixup sp to get headroom */ + blrl + + /* child returned, call _exit */ + li %r0, SYS___threxit + sc +1: + li %r3, -1 +2: + b PIC_PLT(_C_LABEL(__cerror)) |