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Merge pull request #368 from Ox0000/master

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System Calls chapter: Fixing spelling mistake and links
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0xAX 2016-04-08 23:12:41 +06:00
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SysCall/README.md
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@ -4,5 +4,5 @@ This chapter describes the `system call` concept in the linux kernel.
* [Introduction to system call concept](http://0xax.gitbooks.io/linux-insides/content/SysCall/syscall-1.html) - this part is introduction to the `system call` concept in the Linux kernel.
* [How the Linux kernel handles a system call](http://0xax.gitbooks.io/linux-insides/content/SysCall/syscall-2.html) - this part describes how the Linux kernel handles a system call from an userspace application.
* [vsyscall and vDSO](http://0xax.gitbooks.io/linux-insides/content/SysCall/syscall-2.html) - third part describes `vsyscall` and `vDSO` concepts.
* [How the Linux kernel runs a program](http://0xax.gitbooks.io/linux-insides/content/SysCall/syscall-3.html) - this part describes startup process of a program.
* [vsyscall and vDSO](http://0xax.gitbooks.io/linux-insides/content/SysCall/syscall-3.html) - third part describes `vsyscall` and `vDSO` concepts.
* [How the Linux kernel runs a program](http://0xax.gitbooks.io/linux-insides/content/SysCall/syscall-4.html) - this part describes startup process of a program.

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SysCall/syscall-3.md
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@ -11,7 +11,7 @@ We already know what is a `system call`. This is special routine in the Linux ke
Introduction to vsyscalls
--------------------------------------------------------------------------------
The `vsyscall` or `virtual system call` is the first and oldest mechinism in the Linux kernel that is designed to accelerate execution of certain system calls. The principle of work of the `vsyscall` concept is simple. The Linux kernel maps into user space a page that contains some variables and the implementation of some system calls. We can find information about this memory space in the Linux kernel [documentation](https://github.com/torvalds/linux/blob/master/Documentation/x86/x86_64/mm.txt) for the [x86_64](https://en.wikipedia.org/wiki/X86-64):
The `vsyscall` or `virtual system call` is the first and oldest mechanism in the Linux kernel that is designed to accelerate execution of certain system calls. The principle of work of the `vsyscall` concept is simple. The Linux kernel maps into user space a page that contains some variables and the implementation of some system calls. We can find information about this memory space in the Linux kernel [documentation](https://github.com/torvalds/linux/blob/master/Documentation/x86/x86_64/mm.txt) for the [x86_64](https://en.wikipedia.org/wiki/X86-64):
```
ffffffffff600000 - ffffffffffdfffff (=8 MB) vsyscalls