I tried to build a UML 2.6.26 kernel on Debian (32-bit) and ran into the same problem reported here http://marc.info/?t=121011533500002&r=1&w=2. If I use gcc 4.3 everything works fine, but if I use gcc 4.1 or 4.2, UML crashes on startup. I changed the gcc version check to 0430 and both 4.1 and 4.2 compiled kernels worked fine.
Also, is there any chance of getting a SKAS4 patch against 2.6.26? I was trying to test it against 2.6.25.10 and had some strange issues. I was running Debian Etch inside VMWare with a 2.6.25.10 SKAS4-enabled kernel. When I tried to start up a UML instance from root or a non-root account I was getting the same problem reported here.. http://thread.gmane.org/gmane.linux.uml.user/13045/focus=13059. Now the weird part is if I started UML via sudo from a non-root account I'd get a segfault somewhere in libc but then UML would boot up into a working Linux environment saying SKAS4 was enabled. Was hoping to try and test it some more on a newer kernel if there's a patch available. Benny Halevy wrote: > gcc 4.3.0 needs -funit-at-a-time for extern inline functions > otherwise it doesn't find their body. > > For example: > $ gcc --version > gcc (GCC) 4.3.0 20080428 (Red Hat 4.3.0-8) > > /usr0/export/dev/bhalevy/git/linux-pnfs-bh-nfs41/fs/buffer.c: In function > ‘alloc_page_buffers’: > /usr0/export/dev/bhalevy/git/linux-pnfs-bh-nfs41/fs/buffer.c:51: sorry, > unimplemented: inlining failed in call to ‘init_buffer’: function body not > available > /usr0/export/dev/bhalevy/git/linux-pnfs-bh-nfs41/fs/buffer.c:948: sorry, > unimplemented: called from here > > Fix follows the lines of commit 22eecde2f9034764a3fd095eecfa3adfb8ec9a98 > that was reverted by commit c0a18111e571138747a98af18b3a2124df56a0d1, > just limiting the flag for pre- gcc 4.3.0 rather than 4.0. > > Signed-off-by: Benny Halevy <[EMAIL PROTECTED]> > --- > arch/um/Makefile | 6 +++++- > 1 files changed, 5 insertions(+), 1 deletions(-) > > diff --git a/arch/um/Makefile b/arch/um/Makefile > index dbeab15..e7ed37b 100644 > --- a/arch/um/Makefile > +++ b/arch/um/Makefile > @@ -77,7 +77,11 @@ include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) > KERNEL_DEFINES = $(strip -Derrno=kernel_errno > -Dsigprocmask=kernel_sigprocmask \ > -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) > KBUILD_CFLAGS += $(KERNEL_DEFINES) > -KBUILD_CFLAGS += $(call cc-option,-fno-unit-at-a-time,) > +# Disable unit-at-a-time mode on pre-gcc-4.3 compilers, it makes gcc use > +# a lot more stack due to the lack of sharing of stacklots: > +# gcc 4.3.0 needs -funit-at-a-time for extern inline functions > +KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0403 ] ; then \ > + echo $(call cc-option,-fno-unit-at-a-time); fi ;) > > PHONY += linux > ------------------------------------------------------------------------- Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
