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DateSat, 21 Sep 2002 01:09:12 -0700
Fromgeorge anzinger <>
SubjectRe: Syscall changes registers beyond %eax, on linux-i386
Richard Henderson wrote:
> 
> On Fri, Sep 20, 2002 at 01:32:05AM -0700, george anzinger wrote:
> > So, is there a problem?  Yes, neither the call stub macros
> > in asm/unistd.h nor those in glibc bother to list the used
> > registers beyond the third ":".
> 
> No, this is not the real problem.  The real problem is that if
> the program receives a signal during a system call, the kernel
> will return all the way up to entry.S, deliver the signal and
> then restart the syscall.
> 
> Except the syscall will restart with the corrupted registers.
> 
> Hilarity ensues.
> 
I submit that BOTH of these are problems.  And only  the
kernel can fix the latter.

-g
-- 
George Anzinger   george@mvista.com
High-res-timers: 
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
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