location of inbuilt system call implementation

[Niroj Pokhrel]

Hi All,
I am newbies to Linux and am going through system call in kernel-3.4. I
just wanted to check how sys_read, sys_write or other system calls work but
I was searching for the implementation but couldn't find it.
I found that :
System Call are added in /arch/x86/syscalls/syscall_32(or64).tbl. and
they were declared in /incude/linux/sycalls.h
But I was not able to find exactly where they are implemented.

Thanking you all in advance.
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