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Update syscall-1.md

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0xAX 2015-10-25 18:38:39 +06:00
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SysCall/syscall-1.md
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@ -244,7 +244,7 @@ As we can see the `SYSCALL_DEFINE3` macro takes `name` parameter which will repr
* `SYSCALL_METADATA`;
* `__SYSCALL_DEFINEx`.
Implementation of the first macro `SYSCALL_METADATA` depends on the `CONFIG_FTRACE_SYSCALLS` kernel configuration option. As we can understand from the name of this option, it allows to enable tracer to catch the syscall entry and exit events. If this kernel configration option is enabled, the `SYSCALL_METADATA` macro executes initialization of the `syscall_metadata` structure that defined in the [include/trace/syscall.h](https://github.com/torvalds/linux/blob/master/include/trace/syscall.h) header file and contains different useful fields as name of a system call, number of a system call in the system call [table](https://github.com/torvalds/linux/blob/master/arch/x86/entry/syscalls/syscall_64.tbl), number of parameters of a system call, list of parameter types and etc:
Implementation of the first macro `SYSCALL_METADATA` depends on the `CONFIG_FTRACE_SYSCALLS` kernel configuration option. As we can understand from the name of this option, it allows to enable tracer to catch the syscall entry and exit events. If this kernel configuration option is enabled, the `SYSCALL_METADATA` macro executes initialization of the `syscall_metadata` structure that defined in the [include/trace/syscall.h](https://github.com/torvalds/linux/blob/master/include/trace/syscall.h) header file and contains different useful fields as name of a system call, number of a system call in the system call [table](https://github.com/torvalds/linux/blob/master/arch/x86/entry/syscalls/syscall_64.tbl), number of parameters of a system call, list of parameter types and etc:
```C
#define SYSCALL_METADATA(sname, nb, ...) \