如何禁用一条指令的中断？

Question

除了使用 CLI 指令外，还有其他方法可以在 x86 中的 只有一条指令 期间禁用中断吗？

Answer 1

是的，用 MOV 加载 SS 将禁止下一条指令的外部中断。指令集参考是这样说的：

Loading the SS register with a MOV instruction inhibits all interrupts until after the execution of the next instruction. This operation allows a stack pointer to be loaded into the ESP register with the next instruction (MOV ESP, stack-pointer value) before an interrupt occurs.

Answer 2

这段代码片段可以解决问题：

pushf
pop  ax
and  ax, FDFFh
push ax
popf               ;This disables interrupts, You didn't use "CLI"
; Here IF is clear
sti

如何禁用一条指令的中断？

How to disable interrupts for one instruction?

assembly

x86

interrupt