On 07/01/2015 08:23 AM, Jun Koi wrote: > Hello, > > I am trying to monitor all the memory writing events inside Qemu by > instrumenting tcg_gen_qemu_st8, tcg_gen_qemu_st16, tcg_gen_qemu_st32, > tcg_gen_qemu_st64, as followings: > > > // in tcg-op.h > > void helper_checkmem(int64_t data, int64_t address); // this is declared > elsewhere > > static inline void tcg_gen_qemu_st8(struct uc_struct *uc, TCGv arg, TCGv addr, > int mem_index) > { > #if TARGET_LONG_BITS == 32 > TCGArg args[2] = { GET_TCGV_I32(arg), GET_TCGV_I32(addr) }; > #else > TCGArg args[2] = { GET_TCGV_I64(arg), GET_TCGV_I64(addr) }; > #endif > tcg_gen_callN(&tcg_ctx, helper_checkmem, dh_retvar_void, 2, args); > tcg_gen_qemu_st_tl(uc, arg, addr, mem_index, MO_UB); > } > > > However, when I compile, helper_checkmem() is never called at runtime when > memory is accessed. > What is wrong with my code?
What guest code are you running? Does it have a strb instruction? If you're able to code a simple bare metal test case you should be able to debug qemu with gdb to see what code paths are taken and why the ones you anticipated aren't. Chris -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project