Messages in this thread | | | From | Florian Weimer <> | Subject | Re: RFD: x32 ABI system call numbers | Date | Tue, 06 Sep 2011 22:40:21 +0200 |
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* Linus Torvalds:
> On Fri, Aug 26, 2011 at 5:36 PM, Linus Torvalds > <torvalds@linux-foundation.org> wrote: >> >> There is *ZERO* reason to not use it. Use the standard 64-bit >> structure layout. Why the hell would it be a new system call? > > Oh, I see why you do that. It's because our 64-bit 'struct stat' uses > "unsigned long" etc. > > Just fix that. Make it use __u64 instead of "unsigned long", and > everything should "just work". The 64-bit kernel will not change any > ABI, and when you compile your new ia32 model, it will do the right > thing too.
And even if you don't want to do that (probably somebody wants to recompile broken applications, same rationale as for n32, see <http://gcc.gnu.org/ml/gcc/2011-02/msg00243.html>), you can still do the translation in user space. Then tools like strace and valgrind just work, and you don't risk introducing kernel vulnerabilities through broken translation code.
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