[uml-devel] 2.6.13.4-bs4 released - fixes for SKAS0 problems - careful about COW

[uml-devel] 2.6.13.4-bs4 released - fixes for SKAS0 problems - careful about COW

[Blaisorblade]

Ok, I've batched together the existing fixes and released -bs4.
It's really nice, it fixes various problems, as indicated on the website. But 
it also restores the 2.6.12 COW format (see below) - so please beware to your 
COW files!

Changelog follows

* -bs3 didn't apply on top of 2.6.13.3, because one of his patches was merged 
in it. So remove it from -bs. 

* CAREFUL : 2.6.13 kernel changed the COW format from all previous kernels in 
an unintended way (and it wasn't our fault). -bs4 restores the previous 
format, but this means you likely won't be able to use the same COW files 
when switching from any 2.6.13 to -bs4; but -bs4 has the same format as any 
<= 2.6.12 or >= 2.6.14 UML kernel. 

*  fix compilation of UML on x86_64 with SKAS0 

* fix compilation of UML on i386 without SKAS mode 

* fix SKAS0 mode assembly code - this could stop it from working on some old 
GCC compilers (this happened, for instance, on GCC 3.2.3, and on RH 9).

-- 
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

		
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Re: [uml-devel] 2.6.13.4-bs4 released - fixes for SKAS0 problems - careful about COW

[Phill Wombat]

Hi List,

Start the process of compiling 2.6.13.4-bs4.

x86_64 host, i386 UML.

Using same config as successful 2.6.12.5-bb12-skas0.

Some compile errors encountered:

================ SNIP ======================
  SYMLINK arch/um/sys-i386/bitops.c
  CC      arch/um/sys-i386/bitops.o
  CC      arch/um/sys-i386/bugs.o
  AS      arch/um/sys-i386/checksum.o
  CC      arch/um/sys-i386/delay.o
  CC      arch/um/sys-i386/fault.o
  CC      arch/um/sys-i386/ksyms.o
  CC      arch/um/sys-i386/ldt.o
  CC      arch/um/sys-i386/ptrace.o
  CC      arch/um/sys-i386/ptrace_user.o
  SYMLINK arch/um/sys-i386/semaphore.c
  CC      arch/um/sys-i386/semaphore.o
  CC      arch/um/sys-i386/signal.o
  CC      arch/um/sys-i386/sigcontext.o
  AS      arch/um/sys-i386/stub.o
  CC      arch/um/sys-i386/stub_segv.o
In file included from /usr/include/asm/sigcontext.h:7,
                 from arch/um/sys-i386/stub_segv.c:7:
/usr/include/asm-i386/sigcontext.h:18: error: redefinition of ‘struct _fpreg’
/usr/include/asm-i386/sigcontext.h:23: error: redefinition of ‘struct _fpxreg’
/usr/include/asm-i386/sigcontext.h:29: error: redefinition of ‘struct _xmmreg’
/usr/include/asm-i386/sigcontext.h:33: error: redefinition of ‘struct _fpstate’
/usr/include/asm-i386/sigcontext.h:57: error: redefinition of ‘struct sigcontext’
make[1]: *** [arch/um/sys-i386/stub_segv.o] Error 1
make: *** [arch/um/sys-i386] Error 2
  CHK     include/linux/version.h
make[1]: `arch/um/sys-i386/util/mk_sc' is up to date.
gcc -Wall -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -ffreestanding -O2     -fno-omit-frame-pointer -fno-optimize-sibling-calls -g  -D__arch_um__ -DSUBARCH=\"i386\" -Iarch/um/include  -I/home/phill/linux-2.6.13/arch/um/kernel/tt/include  -I/home/phill/linux-2.6.13/arch/um/kernel/skas/include -Dvmap=kernel_vmap -Din6addr_loopback=kernel_in6addr_loopback -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask -fno-unit-at-a-time -m32 -U__i386__ -Ui386  -D_LARGEFILE64_SOURCE -Wdeclaration-after-statement -Wno-pointer-sign  -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/4.0.1/include -D__KERNEL__ -Iinclude  -S -o arch/um/kernel-offsets.s arch/um/sys-i386/kernel-offsets.c
  CHK     arch/um/kernel-offsets.h
make[1]: `arch/um/sys-i386/util/mk_thread' is up to date.
  CC [M]  arch/um/drivers/hostaudio_kern.o
  LD [M]  arch/um/drivers/hostaudio.o
================ SNIP ======================

Regards
Phill.

On Sat, 2005-10-15 at 13:25 +0200, Blaisorblade wrote:
> Ok, I've batched together the existing fixes and released -bs4.
> It's really nice, it fixes various problems, as indicated on the website. But 
> it also restores the 2.6.12 COW format (see below) - so please beware to your 
> COW files!
> 
> Changelog follows
> 
> * -bs3 didn't apply on top of 2.6.13.3, because one of his patches was merged 
> in it. So remove it from -bs. 
> 
> * CAREFUL : 2.6.13 kernel changed the COW format from all previous kernels in 
> an unintended way (and it wasn't our fault). -bs4 restores the previous 
> format, but this means you likely won't be able to use the same COW files 
> when switching from any 2.6.13 to -bs4; but -bs4 has the same format as any 
> <= 2.6.12 or >= 2.6.14 UML kernel. 
> 
> *  fix compilation of UML on x86_64 with SKAS0 
> 
> * fix compilation of UML on i386 without SKAS mode 
> 
> * fix SKAS0 mode assembly code - this could stop it from working on some old 
> GCC compilers (this happened, for instance, on GCC 3.2.3, and on RH 9).
> 



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Re: [uml-devel] 2.6.13.4-bs4 released - fixes for SKAS0 problems - careful about COW

[Blaisorblade]

[-- Attachment #1: Type: text/plain, Size: 1483 bytes --]

On Thursday 20 October 2005 22:54, Phill Wombat wrote:
> Hi List,
>
> Start the process of compiling 2.6.13.4-bs4.
>
> x86_64 host, i386 UML.
>
> Using same config as successful 2.6.12.5-bb12-skas0.
>
> Some compile errors encountered:
Can't reproduce that on my i386 host, and probably can't reproduce it on my 
x86_64 compile environment (but I'm too lazy to reboot there).

I would bet your glibc headers have a bug somewhere (this seems a "double 
inclusion of the same header" problem). However, try the attached patch.

> ================ SNIP ======================

>   AS      arch/um/sys-i386/stub.o
>   CC      arch/um/sys-i386/stub_segv.o
> In file included from /usr/include/asm/sigcontext.h:7,
>                  from arch/um/sys-i386/stub_segv.c:7:
> /usr/include/asm-i386/sigcontext.h:18: error: redefinition of ‘struct
> _fpreg’ /usr/include/asm-i386/sigcontext.h:23: error: redefinition of
> ‘struct _fpxreg’ /usr/include/asm-i386/sigcontext.h:29: error: redefinition
> of ‘struct _xmmreg’ /usr/include/asm-i386/sigcontext.h:33: error:
> redefinition of ‘struct _fpstate’ /usr/include/asm-i386/sigcontext.h:57:
> error: redefinition of ‘struct sigcontext’ make[1]: ***
> [arch/um/sys-i386/stub_segv.o] Error 1

-- 
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

[-- Attachment #2: uml-stub-segv_c-compile-fix --]
[-- Type: text/x-diff, Size: 369 bytes --]

Index: linux-2.6.13/arch/um/sys-i386/stub_segv.c
===================================================================
--- linux-2.6.13.orig/arch/um/sys-i386/stub_segv.c
+++ linux-2.6.13/arch/um/sys-i386/stub_segv.c
@@ -4,7 +4,6 @@
  */
 
 #include <signal.h>
-#include <asm/sigcontext.h>
 #include <asm/unistd.h>
 #include "uml-config.h"
 #include "sysdep/sigcontext.h"

Re: [uml-devel] 2.6.13.4-bs4 released - fixes for SKAS0 problems - careful about COW

[Phill Wombat]

Fixed!! Compiles OK now.

Thanks
Phill.

On Fri, 2005-10-21 at 11:20 +0200, Blaisorblade wrote:
> On Thursday 20 October 2005 22:54, Phill Wombat wrote:
> > Hi List,
> >
> > Start the process of compiling 2.6.13.4-bs4.
> >
> > x86_64 host, i386 UML.
> >
> > Using same config as successful 2.6.12.5-bb12-skas0.
> >
> > Some compile errors encountered:
> Can't reproduce that on my i386 host, and probably can't reproduce it on my 
> x86_64 compile environment (but I'm too lazy to reboot there).
> 
> I would bet your glibc headers have a bug somewhere (this seems a "double 
> inclusion of the same header" problem). However, try the attached patch.
> 
> > ================ SNIP ======================
> 
> >   AS      arch/um/sys-i386/stub.o
> >   CC      arch/um/sys-i386/stub_segv.o
> > In file included from /usr/include/asm/sigcontext.h:7,
> >                  from arch/um/sys-i386/stub_segv.c:7:
> > /usr/include/asm-i386/sigcontext.h:18: error: redefinition of ‘struct
> > _fpreg’ /usr/include/asm-i386/sigcontext.h:23: error: redefinition of
> > ‘struct _fpxreg’ /usr/include/asm-i386/sigcontext.h:29: error: redefinition
> > of ‘struct _xmmreg’ /usr/include/asm-i386/sigcontext.h:33: error:
> > redefinition of ‘struct _fpstate’ /usr/include/asm-i386/sigcontext.h:57:
> > error: redefinition of ‘struct sigcontext’ make[1]: ***
> > [arch/um/sys-i386/stub_segv.o] Error 1
> 



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