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<上游3.1更新后的中文更新版本>

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Albertchamberlain
2020-05-12 20:19:03 +08:00
parent 95bc785248
commit 481bdfb2c5
3 changed files with 26 additions and 22 deletions
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4
CONTRIBUTORS.md
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@@ -42,4 +42,6 @@
[@NeoCui](https://github.com/NeoCui)
[@narcijie](https://github.com/narcijie)
[@narcijie](https://github.com/narcijie)
[@Albertchamberlain](https://github.com/Albertchamberlain)

42
Interrupts/linux-interrupts-1.md
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@@ -422,34 +422,36 @@ SYM_DATA(initial_gs,
所有被 `IST` 切换到新栈的中断门描述符都由 `set_intr_gate_ist` 函数初始化。例如:
```C
set_intr_gate_ist(X86_TRAP_NMI, &nmi, NMI_STACK);
...
...
...
set_intr_gate_ist(X86_TRAP_DF, &double_fault, DOUBLEFAULT_STACK);
static const __initconst struct idt_data def_idts[] = {
...
INTG(X86_TRAP_NMI, nmi),
...
INTG(X86_TRAP_DF, double_fault),
```
其中 `&nmi` 和 `&double_fault` 是中断函数的入口地址：
其中 `&nmi` 和 `&double_fault` 在以下位置创建入口点：
[arch/x86/kernel/entry_64.S](https://github.com/torvalds/linux/blob/master/arch/x86/entry/entry_64.S)中
```assembly
idtentry double_fault do_double_fault has_error_code=1 paranoid=2 read_cr2=1
...
...
...
SYM_CODE_START(nmi)
...
...
...
SYM_CODE_END(nmi)
SYM_CODE_END(nmi)
```
在以下位置给出了中断处理程序的声明 [arch/x86/include/asm/traps.h](https://github.com/torvalds/linux/blob/master/arch/x86/include/asm/traps.h):
```C
asmlinkage void nmi(void);
asmlinkage void double_fault(void);
```
定义在 [arch/x86/kernel/entry_64.S](https://github.com/torvalds/linux/blob/master/arch/x86/kernel/entry_64.S)中
```assembly
idtentry double_fault do_double_fault has_error_code=1 paranoid=2
...
...
...
ENTRY(nmi)
...
...
...
END(nmi)
```
当一个中断或者异常发生时，新的 `ss` 选择器被强制置为 `NULL`，并且 `ss` 选择器的 `rpl` 域被设置为新的 `cpl`。旧的 `ss`、`rsp`、寄存器标志、`cs`、`rip` 被压入新栈。在 64 位模型下，中断栈帧大小固定为 8 字节，所以我们可以得到下面的栈:
```

2
README.md
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@@ -43,7 +43,7 @@
|└ [2.10](https://github.com/MintCN/linux-insides-zh/blob/master/Initialization/linux-initialization-10.md)||未开始|
| 3. [Interrupts](https://github.com/MintCN/linux-insides-zh/tree/master/Interrupts)||正在进行|
|├ [3.0](https://github.com/MintCN/linux-insides-zh/blob/master/Interrupts/README.md)|[@littleneko](https://github.com/littleneko)|更新至[57279321](https://github.com/0xAX/linux-insides/commit/5727932167a2ff6a1e647081c85d081d4ed8b508)|
|├ [3.1](https://github.com/MintCN/linux-insides-zh/blob/master/Interrupts/linux-interrupts-1.md)||正在进行|
|├ [3.1](https://github.com/MintCN/linux-insides-zh/blob/master/Interrupts/linux-interrupts-1.md)|[@Albertchamberlain](https://github.com/Albertchamberlain)|更新至[e58c06bf](https://github.com/0xAX/linux-insides/commit/e58c06bfca60d4af25d92562de1ee9959992fc68)|
|├ [3.2](https://github.com/MintCN/linux-insides-zh/blob/master/Interrupts/linux-interrupts-2.md)|[@narcijie](https://github.com/narcijie)|更新至[4d635117](https://github.com/0xAX/linux-insides/commit/4d6351172486e5c046a7d3db2286fc0d0d0d7789)|
|├ [3.3](https://github.com/MintCN/linux-insides-zh/blob/master/Interrupts/linux-interrupts-3.md)||未开始|
|├ [3.4](https://github.com/MintCN/linux-insides-zh/blob/master/Interrupts/linux-interrupts-4.md)||未开始|