change(vector.S): port hw stack guard change to p4

components/freertos/FreeRTOS-Kernel/portable/riscv/portasm.S

@@ -40,7 +40,7 @@
     .type rtos_int_enter, @function
 rtos_int_enter:
 #if CONFIG_IDF_TARGET_ESP32P4
-    /* needs jira for p4 */
+    //TODO: IDF-7861
     /* preserve the return address */
     mv t1, ra
     mv t2, a0
@@ -106,7 +106,7 @@ rtos_int_enter:
 
 rtos_enter_end:
 #if CONFIG_IDF_TARGET_ESP32P4
-    /* needs jira for p4 */
+    //TODO: IDF-7861
     mv  ra, t1
 #endif
     ret

components/riscv/vectors.S

@@ -300,6 +300,12 @@ _interrupt_handler:
     /* Save SP */
     sw    t0, RV_STK_SP(sp)
 
+#if CONFIG_IDF_TARGET_ESP32P4
+    //TODO: IDF-7861
+    /* Before doing anythig preserve the stack pointer */
+    /* It will be saved in current TCB, if needed */
+    mv      a0, sp
+#endif  //#if CONFIG_IDF_TARGET_ESP32P4
     call    rtos_int_enter
     /* If this is a non-nested interrupt, SP now points to the interrupt stack */
 
@@ -375,6 +381,12 @@ _interrupt_handler:
 #endif
     call    rtos_int_exit
 
+#if CONFIG_IDF_TARGET_ESP32P4
+    //TODO: IDF-7861
+    /* The next (or current) stack pointer is returned in a0 */
+    mv      sp, a0
+#endif  //#if CONFIG_IDF_TARGET_ESP32P4
+
     /* restore the rest of the registers */
     csrw    mcause, s1
     csrw    mstatus, s2