diff --git a/src/posix/platform/misc.c b/src/posix/platform/misc.c
index 61f5f0c3b..7a7f8c540 100644
--- a/src/posix/platform/misc.c
+++ b/src/posix/platform/misc.c
@@ -35,6 +35,7 @@
 #include <openthread/platform/misc.h>
 
 #include "openthread-system.h"
+#include "common/logging.hpp"
 
 extern jmp_buf gResetJump;
 
@@ -89,3 +90,33 @@ otPlatMcuPowerState otPlatGetMcuPowerState(otInstance *aInstance)
     (void)aInstance;
     return gPlatMcuPowerState;
 }
+
+void SuccessOrDie(otError aError)
+{
+    int exitCode;
+
+    switch (aError)
+    {
+    case OT_ERROR_NONE:
+        return;
+
+    case OT_ERROR_INVALID_ARGS:
+        exitCode = OT_EXIT_INVALID_ARGUMENTS;
+        break;
+
+    default:
+        exitCode = OT_EXIT_FAILURE;
+        break;
+    }
+
+    otLogCritPlat("Error: %s", otThreadErrorToString(aError));
+    exit(exitCode);
+}
+
+void VerifyOrDie(bool aCondition, int aExitCode)
+{
+    if (!aCondition)
+    {
+        exit(aExitCode);
+    }
+}
diff --git a/src/posix/platform/platform-posix.h b/src/posix/platform/platform-posix.h
index f9907214a..29b506bc6 100644
--- a/src/posix/platform/platform-posix.h
+++ b/src/posix/platform/platform-posix.h
@@ -91,7 +91,12 @@ enum
     /**
      * Incompatible radio spinel.
      */
-    OT_EXIT_INCOMPATIBLE_RADIO_SPINEL = 3,
+    OT_EXIT_RADIO_SPINEL_INCOMPATIBLE = 3,
+
+    /**
+     * Unexpected radio spinel reset.
+     */
+    OT_EXIT_RADIO_SPINEL_RESET = 4,
 };
 
 /**
@@ -353,6 +358,24 @@ void platformUdpProcess(otInstance *aInstance, const fd_set *aReadSet);
  */
 void platformUdpUpdateFdSet(otInstance *aInstance, fd_set *aReadFdSet, int *aMaxFd);
 
+/**
+ * This function ends the current process with exit code @p aExitCode if @p aCondition is false.
+ *
+ * @param[in]   aCondition  The condition to verify
+ * @param[in]   aExitCode   The exit code if exits.
+ *
+ */
+void VerifyOrDie(bool aCondition, int aExitCode);
+
+/**
+ * This function ends the current process if @p aError is not OT_ERROR_NONE.
+ * The error code will be mapped from @p aError.
+ *
+ * @param[in]   aError  The OpenThread error code.
+ *
+ */
+void SuccessOrDie(otError aError);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/posix/platform/radio_spinel.cpp b/src/posix/platform/radio_spinel.cpp
index b1072d841..0738d8b1c 100644
--- a/src/posix/platform/radio_spinel.cpp
+++ b/src/posix/platform/radio_spinel.cpp
@@ -142,23 +142,6 @@ static inline bool isAckRequested(const uint8_t *frame)
     return (frame[0] & IEEE802154_ACK_REQUEST) != 0;
 }
 
-static inline void SuccessOrDie(otError aError)
-{
-    if (aError != OT_ERROR_NONE)
-    {
-        // fprintf(stderr, "Operation failed: %s\r\n", otThreadErrorToString(aError));
-        exit(OT_EXIT_FAILURE);
-    }
-}
-
-static inline void VerifyOrDie(bool aCondition)
-{
-    if (!aCondition)
-    {
-        exit(OT_EXIT_FAILURE);
-    }
-}
-
 namespace ot {
 
 static otError SpinelStatusToOtError(spinel_status_t aError)
@@ -543,7 +526,7 @@ void RadioSpinel::Init(const char *aRadioFile, const char *aRadioConfig)
     else
     {
         otLogCritPlat("Radio file '%s' not supported", aRadioFile);
-        exit(OT_EXIT_INVALID_ARGUMENTS);
+        ExitNow(error = OT_ERROR_INVALID_ARGS);
     }
 
     SuccessOrExit(error = SendReset());
@@ -581,7 +564,7 @@ otError RadioSpinel::CheckSpinelVersion(void)
     {
         otLogCritPlat("Spinel version mismatch - PosixApp:%d.%d, RCP:%d.%d", SPINEL_PROTOCOL_VERSION_THREAD_MAJOR,
                       SPINEL_PROTOCOL_VERSION_THREAD_MINOR, versionMajor, versionMinor);
-        exit(OT_EXIT_INCOMPATIBLE_RADIO_SPINEL);
+        exit(OT_EXIT_RADIO_SPINEL_INCOMPATIBLE);
     }
 
 exit:
@@ -623,7 +606,7 @@ otError RadioSpinel::CheckCapabilities(void)
     if (!supportsRawRadio)
     {
         otLogCritPlat("RCP capability list does not include support for radio/raw mode");
-        exit(OT_EXIT_INCOMPATIBLE_RADIO_SPINEL);
+        exit(OT_EXIT_RADIO_SPINEL_INCOMPATIBLE);
     }
 
 exit:
@@ -648,7 +631,7 @@ otError RadioSpinel::CheckRadioCapabilities(void)
                       (mRadioCaps & OT_RADIO_CAPS_TRANSMIT_RETRIES) ? "yes" : "no",
                       (mRadioCaps & OT_RADIO_CAPS_CSMA_BACKOFF) ? "yes" : "no");
 
-        exit(OT_EXIT_INCOMPATIBLE_RADIO_SPINEL);
+        exit(OT_EXIT_RADIO_SPINEL_INCOMPATIBLE);
     }
 
 exit:
@@ -858,7 +841,7 @@ void RadioSpinel::HandleValueIs(spinel_prop_key_t aKey, const uint8_t *aBuffer,
             mIsReady = true;
 
             // If RCP crashes/resets while radio was enabled, posix app exits.
-            VerifyOrDie(!IsEnabled());
+            VerifyOrDie(!IsEnabled(), OT_EXIT_RADIO_SPINEL_RESET);
         }
         else
         {