Linux ISR 入口点在哪里 [英] Where is the Linux ISR Entry Point

问题描述

我正在尝试了解 Linux 内核中的系统调用接口和实现.我了解 entry.S 以及 libc 标头和实现之间的关系.我想知道的是内核中第一次收到 int 80h 的位置，即决定它实际上是 80h 中断的地方.任何人都可以指向我的 LXR 链接吗?

I'm trying to understand the system call interface and implementation in the Linux kernel. I know about entry.S and the relationship between libc headers and implementation. What I want to know is where in the kernel is the int 80h received for the first time i.e. the place that decides that it's actually the 80h interrupt. Can anyone point me to the LXR link for this please?

推荐答案

CONFIG_X86_32

1. arch/x86/kernel/entry_32.S:system_call (INT $0x80)
2. arch/x86/kernel/entry_32.S:ia32_sysenter_target (SYSENTER)

1. arch/x86/kernel/entry_32.S:system_call (INT $0x80)
2. arch/x86/kernel/entry_32.S:ia32_sysenter_target (SYSENTER)

CONFIG_X86_64

1. arch/x86/kernel/entry_64.S:system_call (SYSCALL, 64bit)

1. arch/x86/kernel/entry_64.S:system_call (SYSCALL, 64bit)

CONFIG_X86_64 和 CONFIG_IA32_EMULATION

1. arch/x86/ia32/ia32entry.S:ia32_sysenter_target (SYSENTER)
2. arch/x86/ia32/ia32entry.S:ia32_cstar_target (SYSCALL, 32bit)
3. arch/x86/ia32/ia32entry.S:ia32_syscall (INT $0x80)

1. arch/x86/ia32/ia32entry.S:ia32_sysenter_target (SYSENTER)
2. arch/x86/ia32/ia32entry.S:ia32_cstar_target (SYSCALL, 32bit)
3. arch/x86/ia32/ia32entry.S:ia32_syscall (INT $0x80)

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