diff --git a/CPU/CH32V10x/os_port_gnu.S b/CPU/CH32V10x/os_port_gnu.S
index a773351..af4077f 100644
--- a/CPU/CH32V10x/os_port_gnu.S
+++ b/CPU/CH32V10x/os_port_gnu.S
@@ -22,21 +22,21 @@
 //// CODE
 
 #ifdef OS_CFG_CPU_CLZ_ASM_PRESENT
-.section .text.cpu_clz,"ax",%progbits
-.align 8
-.func
-.global cpu_clz
+    .section .text.cpu_clz,"ax",%progbits
+    .align 8
+    .func
+    .global cpu_clz
 cpu_clz:
     clz a0, a0
     ret
     .endfunc
 #endif
 
-.section .text.os_port_context_switch_to,"ax",%progbits
-.align 2
-.func
-.global os_port_context_switch_to
-.extern os_port_on_switch_success
+    .section .text.os_port_context_switch_to,"ax",%progbits
+    .align 2
+    .func
+    .global os_port_context_switch_to
+    .extern os_port_on_switch_success
 os_port_context_switch_to:
     li   t0,        0x1800
     csrw mstatus,   t0                      // 1. 关中断
@@ -151,13 +151,13 @@ os_port_context_switch_to:
     .endfunc
 
 
-.section .text.SW_Handler,"ax",%progbits
-.align 2
-.func
-.global SW_Handler
-.extern g_os_port_switch_from_sp
-.extern g_os_port_switch_to_sp
-.extern os_port_on_switch_success
+    .section .text.SW_Handler,"ax",%progbits
+    .align 2
+    .func
+    .global SW_Handler
+    .extern g_os_port_switch_from_sp
+    .extern g_os_port_switch_to_sp
+    .extern os_port_on_switch_success
 SW_Handler:
     csrci mstatus, 0x08 // 立刻关闭全局中断 MIE = 0
 
@@ -369,11 +369,11 @@ SW_Handler:
 
 
 
-.section .text.SysTick_Handler,"ax",%progbits
-.align 2
-.global SysTick_Handler
-.extern SysTick_Handler_C
-.func
+    .section .text.SysTick_Handler,"ax",%progbits
+    .align 2
+    .global SysTick_Handler
+    .extern SysTick_Handler_C
+    .func
 SysTick_Handler:
 //    csrci mstatus, 8 // 关闭中断
     /* 1. 因为是硬件中断，先在当前栈上保存必要的临时寄存器(Caller-saved) */