get_user() and put_user() missing in syscall list

Varka Bhadram varkab at cdac.in
Mon Jun 2 04:37:10 EDT 2014


http://stackoverflow.com/questions/20172111/difference-between-system-api-and-system-call-api
http://stackoverflow.com/questions/17219898/what-is-the-difference-between-linux-kernel-api-system-calls-system-inter

These two links will give the diffrence b/w them...


On June 2, 2014 at 1:49 PM Dipanjan Das <mail.dipanjan.das at gmail.com> wrote:

> 
>  I am new to Linux kernel stuffs. How are Kernel API and syscalls differ from
> each other?
> 
> 
>  On 2 June 2014 13:43, Varka Bhadram <varkab at cdac.in <mailto:varkab at cdac.in> >
> wrote:
>    > >    These two are not the system calls. they are the Kernel API's to
>    > > transfer the data from user address space to the kernel address space.
> > 
> >    please see:
> > http://lxr.free-electrons.com/source/arch/x86/include/asm/uaccess.h#L239
> > <http://lxr.free-electrons.com/source/arch/x86/include/asm/uaccess.h#L239>
> >    http://lxr.free-electrons.com/source/arch/x86/include/asm/uaccess.h#L143
> > <http://lxr.free-electrons.com/source/arch/x86/include/asm/uaccess.h#L143>
> > 
> >    Regards,
> >    Varka Bhadram
> > 
> >    MailScanner has detected a possible fraud attempt from
> > "lxr.free-electrons.com" claiming to be On June 2, 2014 at 11:29 AM Dipanjan
> > Das <mail.dipanjan.das at gmail.com> wrote:
> > <http://lxr.free-electrons.com/source/arch/x86/include/asm/uaccess.h#L239>
> > 
> >     > > > 
> > >     Hi,
> > > 
> > >     Here's an exhaustive list
> > > <http://man7.org/linux/man-pages/man2/syscalls.2.html> of Linux syscall,
> > > but I can't find get_user() and put_user() API. Why is it so? What am I
> > > missing?
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> > >    > > 
> > 
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