Re: [uml-devel] Getting the x86-64 rollup patch to work on my x86 laptop.

[Rob Landley <rob@landley.net>]

On Thursday 17 November 2005 21:12, Jeff Dike wrote:
> On Thu, Nov 17, 2005 at 04:51:33PM -0600, Rob Landley wrote:
> > find . -name asm
> > ./include/asm
> > ./include2/asm
> >
> > ls -l include/asm include2/asm
> > lrwxrwxrwx  1 landley landley 72 2005-11-17 16:46 include2/asm
> > ->
> > /home/landley/newbuild/firmware-build/tmpdir/linux-2.6.14/include/asm-um
> > lrwxrwxrwx  1 landley landley  6 2005-11-17 16:46 include/asm -> asm-um
> >
> > ls -l include/asm/arch include2/asm/arch
> > ls: include2/asm/arch: No such file or directory
> > lrwxrwxrwx  1 landley landley 74 2005-11-17 16:46 include/asm/arch
> > ->
> > /home/landley/newbuild/firmware-build/tmpdir/linux-2.6.14/include/asm-i38
> >6
>
> This all looks the same as I have here, except for the asm-i386 thing,
> which I don't think matters.  ldt.h seems to be at the center of this,
> so can you check the following:
>  asm-i386/ldt.h contains a struct user_desc

Yup.

>  asm-um includes asm/arch/ldt.h

There's no asm subdirectory under asm-um.

>  asm-um/ldt.h contains a typedef of uml_ldt_t

asm-um/ldt.h is a 0 byte file.

>  mmu-skas.h includes asm-um/ldt.h

The one in arch/um/include/skas includes asm/ldt.h
The one in arch/um/kernel/skas/include is a 0 byte file.

> Also, generate a .i for the C file that's being built and check that
> the definitions are getting pulled in.  There may be an easier way to
> do this, but I
>        turn on V=1
>        cd obj
>        paste the gcc command into an xterm
>        edit it as follows
>                the -o -c foo.o is replaced by -E
>                add > x.i at the end

The line that's going boing is

gcc -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing 
-fno-common -ffreestanding -O2     -fomit-frame-pointer  -D__arch_um__ 
-DSUBARCH=\"i386\" -Iarch/um/include 
-I/home/landley/newbuild/firmware-build/tmpdir/linux-2.6.14/arch/um/include  
-I/home/landley/newbuild/firmware-build/tmpdir/linux-2.6.14/arch/um/include/skas 
-Dvmap=kernel_vmap -Din6addr_loopback=kernel_in6addr_loopback 
-Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask  -U__i386__ -Ui386 
-mpreferred-stack-boundary=2 -D_LARGEFILE64_SOURCE    -nostdinc 
-isystem /usr/lib/gcc-lib/i486-linux/3.3.5/include -D__KERNEL__ -Iinclude 
-Iinclude2 
-I/home/landley/newbuild/firmware-build/tmpdir/linux-2.6.14/include -include 
include/linux/autoconf.h -S -o 
arch/um/kernel-offsets.s /home/landley/newbuild/firmware-build/tmpdir/linux-2.6.14/arch/um/sys-i386/kernel-offsets.c


I don't even have to add V=1 to get it, that sucker isn't run through a 
prettification macro.  However, whey you say "-o -c foo.o", I can't find that 
to replace it with -E.  Do you mean the "-S -o kernel-offsets.s" bit?

Rob


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