[Qemu-devel] micro-instruction size

[Qemu-devel] micro-instruction size

[divya arora]

Hi,
I want to instrument call instruction so that my
tracking function is called on each call instruction.
>From what I understand, I should
a) change  target-i386/translate.c case 0xe8 to
generate my own microinstruction, say gen_op_mycall()
b) Add functionality of op_mycall() to
target-i386/op.c
c) Add this new micro-instruction in
i386-softmmu/opc.h. 

Is the above correct?
If yes, I am not sure how to determine the
microinstructions size which is required in 
DEF(s, n, copy_size).

Thanks,
Divya


       
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Re: [Qemu-devel] micro-instruction size

[Sorav Bansal]

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> I want to instrument call instruction so that my
> tracking function is called on each call instruction.
> >From what I understand, I should
> a) change  target-i386/translate.c case 0xe8 to
> generate my own microinstruction, say gen_op_mycall()
> b) Add functionality of op_mycall() to
> target-i386/op.c
> c) Add this new micro-instruction in
> i386-softmmu/opc.h.
>
> Is the above correct?


You only need to perform steps A and B.
Step C is automatically taken care of by dyngen.c.
Similarly, the copy_size in DEF(s,n,copy_size) is automatically computed.

Sorav

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