[PTLsim-devel] RIP having 2 macro-ops & gdb debugger

Fri Dec 28 04:41:39 EST 2007

Hi,

  In the trace file i could notice an Rip is having
two Macro-ops ie 

   rip - SOM
         EOM 
         SOM 
         ..
         ..
         EOM 

from logfile 

118307 fetch  rip 0x42cc3a: collcc tr0 = zf,cf,of
[zco]                                                 
                  \(BB 0x401deb40 uopid 4; SOM)

118308 fetch  rip 0x42cc3a: bru.+ rip = zero,zero
[taken 0x42cc3a, seq 0x42cc3a] (BB 0x401deb40 uopid 5;
EOM 2 bytes) -> pred 0x42cc3a

next cycle 

118309 fetch  rip 0x42cc3a: chk.sub.ne tr0 = 
cx,zero,10 (BB 0x401e3000 uopid 0; SOM)

118310 fetch  rip 0x42cc3a: ldb   tr0 = [rsi,0] (BB
0x401e3000 uopid 1)

118311 fetch  rip 0x42cc3a: ldb  tr1 = [rdi,0] (BB
0x401e3000 uopid 2)

118312 fetch  rip 0x42cc3a: add  rsi = rsi,1 (BB
0x401e3000 uopid 3)

are these some special kind of instructions??.I could
see them in the commit stage also.

one more query about the gdb debugger.I was trying to
follow the steps given in the document 

 attach pid 
 load symbol file

     but once the simulator reaches the call ptlswitch
to native,gdb is loosing control and I was unable to
break even when the simulator switches back to
simulation mode.   

thanks
satya

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