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Re: syscalls.list changes: List arguments

To: Jes Sorensen <jes at linuxcare dot com>
Subject: Re: syscalls.list changes: List arguments
From: Greg McGary <greg at kayak dot mcgary dot org>
Date: 27 Jun 2000 11:26:02 -0700
Cc: Andreas Jaeger <aj at suse dot de>, GNU libc hacker <libc-hacker at sourceware dot cygnus dot com>
References: <u8ya3xiqrc.fsf@gromit.rhein-neckar.de> <ms3dm5twyd.fsf@kayak.mcgary.org> <d3vgyvxa59.fsf@lxplus015.cern.ch>

Jes Sorensen <jes@linuxcare.com> writes:

> Ok one thing that confuses me on this one, I see that
> sysdeps/unix/sysv/linux/syscalls.list has mmap as the following:
> 
> mmap		-	mmap		p:piiiii	__mmap		mmap
> 
> But the kernel implementation doesn't use pointers but rather unsigned
> long to specify the address, ie.
> 
> arch/i386/kernel/sys_i386.c:asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
> 
> So shouldn't the signature here be i:iiiiii rather than p:piiiii ? or
> did I get something wrong?

The signatures are determined by the user API as defined in
sys/mman.h, which defines the addr as void*.

References:
- syscalls.list changes: List arguments
  - From: Andreas Jaeger
- Re: syscalls.list changes: List arguments
  - From: Greg McGary

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