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Annotation of researchv9/libc/sys/wait3.s, revision 1.1

1.1     ! root        1: # C library -- wait3
        !             2: 
        !             3: # pid = wait3(&status, flags, &vmstat);
        !             4: #
        !             5: # pid == -1 if error
        !             6: # status indicates fate of process, if given
        !             7: # flags may indicate process is not to hang or
        !             8: # that untraced stopped children are to be reported.
        !             9: # vmstat optionally returns detailed resource usage information
        !            10: #
        !            11: 
        !            12:        wait3 = 7               | same as wait!
        !            13: .globl _wait3
        !            14: .globl  cerror
        !            15: 
        !            16: _wait3:
        !            17:        movl    sp@(8),d0       | make it easy for system to get
        !            18:        movl    sp@(12),d1      | these extra arguments
        !            19:        pea     wait3
        !            20:        orb     #0x1f,cc        | flags wait3()
        !            21:        trap    #0
        !            22:        bcc     noerror
        !            23:        jmp     cerror
        !            24: noerror:
        !            25:        tstl    sp@(4)          | status desired?
        !            26:        beql    nostatus        | no
        !            27:        movl    sp@(4),a1
        !            28:        movl    d1,a1@          | store child's status
        !            29: nostatus:
        !            30:        rts

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