Thursday July 29, 2004

DTrace Instruction Tracing Continues..

Wow, this has me bugged. Using this script ( called itrc.d ):

pid$target:a.out::
{
        printf("%d %016llx",vtimestamp,uregs[R_PC]);
}

# dtrace -s itrc.d -c hello3 > rtrc.hello3

a custom SPARC disassembler, and a really awful perl script, I produced:

Delta NS Address          Instruction   (disassembled)
       0 0000000100000740 bc102000      or      %g0, 0x0, %fp
   12960 0000000100000744 e05ba87f      ldx     [%sp+0x87f], %l0
    7120 0000000100000748 1b000000      sethi   0x0, %o5
    5040 000000010000074c 9a136001      or      %o5, 0x1, %o5
    4960 0000000100000750 9b2b7020      sllx    %o5, 0x1020, %o5
    4640 0000000100000754 13000403      sethi   0x100c00, %o1
    3920 0000000100000758 9212400d      or      %o1, %o5, %o1
    4240 000000010000075c e0226208      stw     %l0, [%o1+ 0x208]
    4240 0000000100000760 a203a887      add     %sp, 0x887, %l1
 ...

I think I'm almost done.

-ejo

(2004-07-29 14:28:54.0) Permalink