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Annotation of researchv9/libc/nsys/wait3.s, revision 1.1.1.1

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:        linkw   a6,#0
                     18:        movl    sp@(12),d0      | make it easy for system to get
                     19:        movl    sp@(16),d1      | these extra arguments
                     20:        pea     wait3
                     21:        orb     #0x1f,cc        | flags wait3()
                     22:        trap    #0
                     23:        bcc     noerror
                     24:        jmp     cerror
                     25: noerror:
                     26:        tstl    sp@(8)          | status desired?
                     27:        beql    nostatus        | no
                     28:        movl    sp@(8),a1
                     29:        movl    d1,a1@          | store child's status
                     30: nostatus:
                     31:        unlk    a6
                     32:        rts

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