Hi Paolo, thanks for your reply!
If you build with simply ARCH=um, you'll build a x86_64 UML binary.
And currently, there's 0 support to 32-bit binaries inside 64-bit hosts.
This
is why it's failing for you.
Ah ha!
But the solution is easy: clean your kernel tree and start over, adding to
all
commands SUBARCH=i386. On a recent enough kernel (and 2.6.13.4 is surely
recent enough) this will produce a 32-bit fully working executable, which
will run your 32bit root FS.
OK, when I try "make linux ARCH=um SUBARCH=i386", the build fails quite
early with the following:
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
Step 6 of part 2.1 of the UML HOWTO
(http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO-2.html#ss2.1)
says:
"Make sure that you don't build this kernel in /usr/src/linux. On some
distributions, /usr/include/asm is a link into this pool. The user-mode
build changes the other end of that link, and things that include
<asm/anything.h> stop compiling."
Is this what I'm experiencing? I'm running 'make' in a temp directory, is
that what it means by "don't build this kernel in /usr/src/linux"? Any idea
how to resolve this?
Many thanks,
Andy
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