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OpenRCE IDA SDK >> get_insn_tev_reg_val

get_insn_tev_reg_val
Category: Tracing

bool idaapi
get_insn_tev_reg_val(int n, const char *regname, regval_t *regval)
Store the value of register *regname into *regval when instruction trace event number n happened, before execution of the instruction. Returns false if the event wasn't an instruction trace event.

See get_insn_tev_reg_result() for obtaining registers after execution.

Examples:
#include <dbg.hpp>

// Loop through all trace events
for (int i = 0; i < get_tev_qty(); i++)
{
    regval_t esp;
    tev_info_t tev;

    // Get the trace event information
    get_tev_info(i, &tev);

    // If it's an instruction trace event...
    if (tev.type == tev_insn)
    {
        // Get ESP, store into &esp
        if (get_insn_tev_reg_val(i, "ESP", &esp))
            // Display the value of ESP
            msg("TEV #%d before exec: %a\n", i, esp.ival);
        else
            msg("No ESP change for TEV #%d\n", i);
    }
}


Related: clear_trace, enable_func_trace, enable_insn_trace, enable_step_trace, get_bpt_tev_ea, get_call_tev_callee, get_insn_tev_reg_result, get_insn_tev_reg_val, get_ret_tev_return, get_tev_info, get_tev_qty, is_func_trace_enabled, is_insn_trace_enabled, is_step_trace_enabled, set_trace_size

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