[Qemu-devel] help with helper functions

[João Corrêa]

Hi Guys,

I'm trying to use some helper functions to instrument translated code, but I'm getting some segfaults while doing it. Here are some code I've placed:

target-i386/helper.h

DEF_HELPER_1(foo, void, tl)

target-i386/op_helper.c

#ifdef TARGET_X86_64

void foo(target_ulong t0){

}

target-i386/translate.c

static inline void gen_jmp_im(target_ulong pc){       

    #ifdef TARGET_X86_64

    printf("test2\n");

    gen_foo(pc);

    printf("test3\n");

    #endif

    tcg_gen_movi_tl(cpu_tmp0, pc);

    tcg_gen_st_tl(cpu_tmp0, cpu_env, offsetof(CPUState, eip));

} 

What happens is that, test2 is printed but test3 is never printed, what means that the function gen_foo(pc) never ended.

Attached to this e-mail follows the output generated with valgrind.

Any help will be very useful. Thanks in advance.

João.

valgrind_output
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