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Doc improvement: Fix register number in lab4 part5 #135

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Doc improvement: Fix register number in lab4 part5 #135

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6 changes: 3 additions & 3 deletions docs/lab-4/guide/part-5.md
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
## 内核栈
4

### 为什么 / 怎么做

Expand Down Expand Up @@ -64,7 +64,7 @@ __interrupt:
# 交换 sp 和 sscratch（切换到内核栈）
csrrw sp, sscratch, sp
# 在内核栈开辟 Context 的空间
addi sp, sp, -36*8
addi sp, sp, -34*8

# 保存通用寄存器，除了 x0（固定为 0）
SAVE x1, 1
Expand Down Expand Up @@ -93,7 +93,7 @@ __restore:
csrw sstatus, t0
csrw sepc, t1
# 将内核栈地址写入 sscratch
addi t0, sp, 36*8
addi t0, sp, 34*8
csrw sscratch, t0

# 恢复通用寄存器
Expand Down