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Annotation of researchv10no/cmd/PDP11/crt/mcount.s, revision 1.1.1.1

1.1       root        1: / count subroutine calls during profiling
                      2: 
                      3: .globl mcount
                      4: .comm  countbase,2
                      5: 
                      6: mcount:
                      7:        mov     (r0),r1
                      8:        bne     1f
                      9:        mov     countbase,r1
                     10:        beq     2f
                     11:        add     $6,countbase
                     12:        mov     (sp),(r1)+
                     13:        mov     r1,(r0)
                     14: 1:
                     15:        inc     2(r1)
                     16:        bne     2f
                     17:        inc     (r1)
                     18: 2:
                     19:        rts     pc
                     20: 

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