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    SubjectRe: [RFC] HOWTO find oops location
    On Sat, Aug 14, 2004 at 09:59:27PM +0300, Denis Vlasenko wrote:
    > > > > Might be also worth mentioning "gcc -c file.c -g -Wa,-a,-ad > file.s"
    > > > > which makes gcc output C code mixed with asm output.
    > > > >
    > > > > Sometimes its not as effective as the comment method you describe,
    > > > > but it will be less work for sure :)
    > > >
    > > > Aha! Cool.
    > > >
    > > > Mmmm... How to ensure that build environment exactly matches one
    > > > used during make? Environment, -On level, regparm, other gcc switches,
    > > > etc, etc, etc? Else file.s object code can be rather different from
    > > > code in file.o...
    > >
    > > No idea.
    >
    > I tried on 2.6:
    >
    > make V=1 fs/dcache.o
    > make V=1 CFLAGS="-g -Wa,-a,-ad" fs/dcache.o >dcache.asm
    >
    > and compared gcc invocation commands. Pseudodiff:
    >
    > - -Wall -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
    > - -fno-common -pipe -msoft-float -mpreferred-stack-boundary=2
    > - -march=i486 -I/.1/usr/srcdevel/kernel/linux-2.6.7-bk20.src/include/asm-i386/mach-default
    > - -Iinclude/asm-i386/mach-default -O2 -falign-functions=1 -falign-labels=1 -falign-loops=1
    > - -falign-jumps=1
    > + -g -Wa,-a,-ad
    >
    > :(

    This worked for me:

    gcc -c -g -Wa,-a,-ad -Wp,-MD,fs/.buffer.o.d -nostdinc -iwithprefix include -D__KERNEL__ -Iinclude
    -Wall -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -pipe -msoft-float
    -mpreferred-stack-boundary=2 -march=athlon -Iinclude/asm-i386/mach-default -O2
    -DKBUILD_BASENAME=buffer -DKBUILD_MODNAME=buffer fs/buffer.c

    The order of the parameters matter in some way, which I have no idea of.
    -
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