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将entry.S中冗余的ret_from_syscall代码删除，改为jmp Restore_all (#98)

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* 将entry.S中冗余的ret_from_syscall代码删除，改为jmp Restore_all
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login 2022-11-29 21:46:13 +08:00 committed by GitHub
parent d85ebf1ff5
commit 036acc52ce
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1 changed files with 1 additions and 28 deletions
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kernel/src/exception/entry.S
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@ -142,36 +142,9 @@ ENTRY(system_call)
callq system_call_function
// 从系统调用中返回
ENTRY(ret_from_system_call)
popq %r15
popq %r14
popq %r13
popq %r12
popq %r11
popq %r10
popq %r9
popq %r8
popq %rbx
popq %rcx
popq %rdx
popq %rsi
popq %rdi
popq %rbp
popq %rax // 不允许直接pop到ds
movq %rax, %ds
popq %rax
movq %rax, %es
popq %rax
addq $0x10, %rsp // 弹出变量FUNC和errcode
sti
iretq
jmp Restore_all