trezor-firmware/core/embed/unix/main_main.c

#include "py/mpthread.h"
#include "py/runtime.h"
#include "py/stackctrl.h"
#ifdef USE_SECP256K1_ZKP
#include "zkp_context.h"
#endif

#include "common.h"

MP_NOINLINE int main_(int argc, char **argv);

int main(int argc, char **argv) {
  collect_hw_entropy();

#ifdef USE_SECP256K1_ZKP
  zkp_context_init();
#endif

#if MICROPY_PY_THREAD
  mp_thread_init();
#endif
  // We should capture stack top ASAP after start, and it should be
  // captured guaranteedly before any other stack variables are allocated.
  // For this, actual main (renamed main_) should not be inlined into
  // this function. main_() itself may have other functions inlined (with
  // their own stack variables), that's why we need this main/main_ split.
  mp_stack_ctrl_init();
  return main_(argc, argv);
}