[Qemu-devel] Translated Basic Block Instrumentation

[Qemu-devel] Translated Basic Block Instrumentation

[Jiaqing Du]

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Hi list,

I'm working on the instrumentation of each (translated) basic block. The
host arch is x86_64. At the beginning of each translated basic block, I
added some instructions to do some accounting. Then under some conditions I
need to raise an NMI inside a translated basic block. The following is (part
of ) what I added to tcg_gen_code_common().

    /* movq EXCP02_NMI,%rdi */
    tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_RDI, EXCP02_NMI);

    /* callq helper_raise_interrupt(EXCP02_NMI) */
    tcg_out8(s, 0xe8);
    tcg_out32(s, (tcg_target_long)raise_exception -
(tcg_target_long)s->code_ptr - 4);


It seems that this NMI is not handled properly in cpu_exec(). I also tried
cpu_interrupt(), this also did not work. What I want to do is to raise an
NMI inside a translated basic block, any suggestions?


Thanks,
Jiaqing

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