usr/src/lib/libc/tahoe/sys/wait3.s

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(SYSLIBC_SCCS) && !defined(lint)
        .asciz "@(#)wait3.s     5.3 (Berkeley) 6/27/88"
#endif /* SYSLIBC_SCCS and not lint */

/*
 * C library -- wait3
 *
 * pid = wait3(&status, flags, &rusage);
 *
 * pid == -1 if error
 * status indicates fate of process, if given
 * flags may indicate process is not to hang or
 * that untraced stopped children are to be reported.
 * rusage optionally returns detailed resource usage information
 */
#include "SYS.h"

#define SYS_wait3       SYS_wait

ENTRY(wait3)
        movl    8(fp),r0        /* make it easy for system to get */
        movl    12(fp),r1       /* these extra arguments */
        bispsw  $0xf            /* flags wait3() (N,Z,V,C)*/
        kcall   $SYS_wait3
        bcc     noerror
        movl    r0,_errno
        mnegl   $1,r0
        ret
noerror:
        tstl    4(fp)           /* status desired? */
        beql    nostatus        /* no */
        movl    r1,*4(fp)       /* store child's status */
nostatus:
        ret