diff --git a/exosphere/src/se.c b/exosphere/src/se.c
index d487ee005..dcc52f4ea 100644
--- a/exosphere/src/se.c
+++ b/exosphere/src/se.c
@@ -52,19 +52,20 @@ void ll_init(volatile se_ll_t *ll, void *buffer, size_t size) {
 }
 
 void set_security_engine_callback(unsigned int (*callback)(void)) {
-    if (callback == NULL || g_se_callback != NULL) {
-        generic_panic();
-    }
-
+    /* Set the callback. */
     g_se_callback = callback;
+
+    /* Enable SE Interrupt firing for async op. */
+    se_get_regs()->SE_INT_ENABLE = 0x10;
 }
 
 /* Fires on Security Engine operation completion. */
 void se_operation_completed(void) {
     se_get_regs()->SE_INT_ENABLE = 0;
-    if (g_se_callback != NULL) {
-        g_se_callback();
+    unsigned int (*callback)(void) = g_se_callback;
+    if (callback != NULL) {
         g_se_callback = NULL;
+        callback();
     }
 }
 
@@ -304,9 +305,6 @@ void se_aes_crypt_insecure_internal(unsigned int keyslot, uint32_t out_ll_paddr,
     /* Set the callback, for after the async operation. */
     set_security_engine_callback(callback);
 
-    /* Enable SE Interrupt firing for async op. */
-    se->SE_INT_ENABLE = 0x10;
-
     /* Setup Input/Output lists */
     se->SE_IN_LL_ADDR = in_ll_paddr;
     se->SE_OUT_LL_ADDR = out_ll_paddr;
@@ -358,9 +356,6 @@ void se_exp_mod(unsigned int keyslot, const void *buf, size_t size, unsigned int
 
     set_security_engine_callback(callback);
 
-    /* Enable SE interrupt firing for async op. */
-    se->SE_INT_ENABLE = 0x10;
-
     flush_dcache_range(stack_buf, stack_buf + KEYSIZE_RSA_MAX);
     trigger_se_rsa_op(stack_buf, size);
 
diff --git a/exosphere/src/smc_user.c b/exosphere/src/smc_user.c
index f2e83629b..7d966b27c 100644
--- a/exosphere/src/smc_user.c
+++ b/exosphere/src/smc_user.c
@@ -36,13 +36,13 @@
 static bool g_crypt_aes_done = false;
 static uint32_t g_exp_mod_result = 0;
 
-static uint8_t g_imported_exponents[4][0x100];
-static uint8_t g_imported_moduli[4][0x100];
+static __attribute__((aligned(4))) uint8_t g_imported_exponents[4][0x100];
+static __attribute__((aligned(4))) uint8_t g_imported_moduli[4][0x100];
 static bool g_is_modulus_verified[4];
 
-static const uint8_t g_rsa_public_key[4] = { 0x00, 0x01, 0x00, 0x01 };
+static __attribute__((aligned(4))) const uint8_t g_rsa_public_key[4] = { 0x00, 0x01, 0x00, 0x01 };
 
-static const uint8_t g_rsa_test_vector[0x100] = {
+static __attribute__((aligned(4))) const uint8_t g_rsa_test_vector[0x100] = {
     'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D',
     'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D',
     'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D',