From 4374966d4e22023b14066c57babcc3c18b6d1b85 Mon Sep 17 00:00:00 2001
From: Marius Vikhammer <marius.vikhammer@espressif.com>
Date: Tue, 26 Jan 2021 19:05:41 +0800
Subject: [PATCH] freerots: fix rtos_int_exit writing outside ISR stack

rtos_int_exit would store RA at an offset of 4 byte from the SP,
where the offset should be 0.

This caused rtos_int_exit to overwrite variables in bss.
---
 components/freertos/port/riscv/portasm.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/components/freertos/port/riscv/portasm.S b/components/freertos/port/riscv/portasm.S
index d32103f5f8..33bfc4c044 100644
--- a/components/freertos/port/riscv/portasm.S
+++ b/components/freertos/port/riscv/portasm.S
@@ -90,9 +90,9 @@ isr_skip_decrement:
 
     /* preserve return address and schedule next task */
     addi sp,sp,-4
-    sw  ra, 0x04(sp)
+    sw  ra, 0(sp)
     call vTaskSwitchContext
-    lw  ra, 0x04(sp)
+    lw  ra, 0(sp)
     addi sp, sp, 4
 
     /* Clears the switch pending flag */