Re: [Qemu-devel] passing translated address out in QEMU

[Wei-Ren Chen]

> even that. is it possible to pass host virtual out. the fast path add
> the addend to get host virtual ? so it must be in a register, most
> likely eax in i386. what do you think would be the best way to get
> that out ?

  Take a look on comment on tcg_out_tlb_load (tcg/i386/tcg-target.c).

   First argument register is loaded with the low part of the address.
   In the TLB hit case, it has been adjusted as indicated by the TLB
   and so is a host address.  In the TLB miss case, it continues to
   hold a guest address.

So I guess you can take "tcg_target_call_iarg_regs[0]" as host virtual
address if software tlb hit.

    /* TLB Hit.  */
    tcg_out_qemu_ld_direct(s, data_reg, data_reg2,
                           tcg_target_call_iarg_regs[0], 0, opc);

As for how do you get host virtual address out, I think you can write
a helper function logging those host virtual address into a file or
something else, then insert a helper function call at the point of
TLB hit.

HTH,
chenwj

-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj