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Merge branch 'yunomae-fix-typo-syscall-2'

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Alexander Kuleshov 2016-10-29 23:36:57 +06:00
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2
SysCall/syscall-2.md
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@ -344,7 +344,7 @@ After this we can see the call of the `LOCKDEP_SYS_EXIT` macro from the [arch/x8
LOCKDEP_SYS_EXIT LOCKDEP_SYS_EXIT
``` ```
The implementation of this macro depends on the `CONFIG_DEBUG_LOCK_ALLOC` kernel configuration option that allows us to debug locks on exit from a system call. And again, we will not consider it in this chapter, but will return to it in a separate one. In the end of the `entry_SYSCALL_64` function we restore all general purpose registers besides `rxc` and `r11`, because the `rcx` register must contain the return address to the application that called system call and the `r11` register contains the old [flags register](https://en.wikipedia.org/wiki/FLAGS_register). After all general purpose registers are restored, we fill `rcx` with the return address, `r11` register with the flags and `rsp` with the old stack pointer: The implementation of this macro depends on the `CONFIG_DEBUG_LOCK_ALLOC` kernel configuration option that allows us to debug locks on exit from a system call. And again, we will not consider it in this chapter, but will return to it in a separate one. In the end of the `entry_SYSCALL_64` function we restore all general purpose registers besides `rcx` and `r11`, because the `rcx` register must contain the return address to the application that called system call and the `r11` register contains the old [flags register](https://en.wikipedia.org/wiki/FLAGS_register). After all general purpose registers are restored, we fill `rcx` with the return address, `r11` register with the flags and `rsp` with the old stack pointer:
```assembly ```assembly
RESTORE_C_REGS_EXCEPT_RCX_R11 RESTORE_C_REGS_EXCEPT_RCX_R11

1
contributors.md
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@ -100,3 +100,4 @@ Thank you to all contributors:
* [Faiz Halde](https://github.com/7coder7) * [Faiz Halde](https://github.com/7coder7)
* [Andrew Hayes](https://github.com/AndrewRussellHayes) * [Andrew Hayes](https://github.com/AndrewRussellHayes)
* [Matthew Fernandez](https://github.com/Smattr) * [Matthew Fernandez](https://github.com/Smattr)
* [Yoshihiro YUNOMAE](https://github.com/yunomae)