Re: [uml-devel] Re: UML-patches to prepare UML/s390

[Bodo Stroesser <bstroesser@fujitsu-siemens.com>]

Blaisorblade wrote:
> On Wednesday 06 April 2005 21:26, Bodo Stroesser wrote:
>>Currently they are the same for 2.4 and 2.6, but worst case that might
>>change in future versions.
> 
> Yes maybe in principle, however the errno values are part of the ABI.
I agree.
> 
>>Only debugger could note this, as ERESTART_XXXX 
>>is unvisible to user programs.
> 
> Well, the debugger is a user program, so even this one, which is almost 
> internal, is part of the ABI.
I agree.

> #ifndef ERESTARTNOINTR
> #define ERESTARTNOINTR KERN_ERESTARTNOINTR
> #endif
This is the solution, I like.
Here is, what strace programmers do, to decode ERESTARTXXXXX
results (from syscall.c):

... snip ...
#include <errno.h>
... snip ...
#ifdef LINUX
#ifndef ERESTARTSYS
#define ERESTARTSYS     512
#endif
#ifndef ERESTARTNOINTR
#define ERESTARTNOINTR  513
#endif
#ifndef ERESTARTNOHAND
#define ERESTARTNOHAND  514     /* restart if no handler.. */
#endif
#ifndef ENOIOCTLCMD
#define ENOIOCTLCMD     515     /* No ioctl command */
#endif
#ifndef ERESTART_RESTARTBLOCK
#define ERESTART_RESTARTBLOCK 516       /* restart by calling sys_restart_syscall */
#endif
#ifndef NSIG
#define NSIG 32
#endif
#ifdef ARM
#undef NSIG
#define NSIG 32
#undef NR_SYSCALL_BASE
#define NR_SYSCALL_BASE __NR_SYSCALL_BASE
#endif
#endif /* LINUX */
... snip ...

So, I'll modify my patch as you suggested.

	Bodo


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