Re: access_ok inside kernelspace

David Woodhouse (David.Woodhouse@mvhi.com)
Tue, 19 Oct 1999 16:40:43 +0100

alan@lxorguk.ukuu.org.uk said:
> Who says sys_call_table[__NR_XXX] is a pointer to a function or even
> exists in that form on non x86 machines. Think about the portability
> side

Declare an arch-specific macro which returns a function pointer from a given
syscall number, according to the implementation of the architecture in
question.

On just about all architectures we support at the moment, it's something
like...

typedef int (*sysfun_p)();
extern sysfun_p sys_call_table[];
#define SYS(x) (sysfun_p)(sys_call_table[x])

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Project Leader, Process Information Systems Mobile: (+44) 7976 658355
Axiom (Cambridge) Ltd., Swaffham Bulbeck, Cambridge, CB5 0NA, UK.
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