From: Blaisorblade <blaisorblade@yahoo.it>
To: user-mode-linux-devel@lists.sourceforge.net
Cc: Nikola Knezevic <laladelausanne@gmail.com>
Subject: Re: [uml-devel] Problem in compiling without optimisations
Date: Thu, 1 Jun 2006 21:07:46 +0200 [thread overview]
Message-ID: <200606012107.47130.blaisorblade@yahoo.it> (raw)
In-Reply-To: <5d8380130605220711u536aa04aud8db4e4bbbb146e@mail.gmail.com>
On Monday 22 May 2006 16:11, Nikola Knezevic wrote:
> Hi all,
> When I change Makefile to have -O0 instead of -O2, this is what I get
> after make ARCH=um:
There are other spots where -O0 would lead to failure; search for -O0 on the
ML, I remember that adding -finline and something else made it work (IIRC
2.6.15 time), and this code was present.
> CC arch/um/kernel/skas/clone.o
> arch/um/include/sysdep/stub.h: In function 'remap_stack':
> arch/um/include/sysdep/stub.h:90: warning: asm operand 7 probably
> doesn't match constraints
> arch/um/include/sysdep/stub.h:90: error: impossible constraint in 'asm'
> make[2]: *** [arch/um/kernel/skas/clone.o] Error 1
> make[1]: *** [arch/um/kernel/skas] Error 2
> make: *** [arch/um/kernel] Error 2
>
> This is the culprit:
> static inline void remap_stack(int fd, unsigned long offset)
> {
> __asm__ volatile ("movl %%eax,%%ebp ; movl %0,%%eax ; int $0x80 ;"
> "movl %7, %%ebx ; movl %%eax, (%%ebx)"
>
> : : "g" (STUB_MMAP_NR), "b"
> : : (UML_CONFIG_STUB_DATA),
>
> "c" (UM_KERN_PAGE_SIZE),
> "d" (PROT_READ | PROT_WRITE),
> "S" (MAP_FIXED | MAP_SHARED), "D" (fd),
> "a" (offset),
> "i" (&((struct stub_data *)
> UML_CONFIG_STUB_DATA)->err)
>
> : "memory");
>
> }
--
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade
Chiacchiera con i tuoi amici in tempo reale!
http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com
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prev parent reply other threads:[~2006-06-02 13:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-22 14:11 [uml-devel] Problem in compiling without optimisations Nikola Knezevic
2006-05-22 14:50 ` [uml-devel] " Nikola Knezevic
2006-05-22 17:12 ` Jeff Dike
2006-05-22 15:08 ` [uml-devel] " Jeff Dike
2006-06-01 19:07 ` Blaisorblade [this message]
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