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    SubjectRe: aranym bug, manifests as "ida_remove called for id=13" on recent kernels
    Al Viro writes:
    > On Mon, Oct 11, 2010 at 12:52:56AM +0100, Al Viro wrote:
    > > On Sun, Oct 10, 2010 at 10:18:03PM +0200, Geert Uytterhoeven wrote:
    > > > >> This is on aranym-0.9.9-1 from Ubuntu/amd64.
    > > > >
    > > > > stat -L /proc/2/exec, otherwise you'll hit lstat() instead of stat().
    > > > > And FWIW 0.9.10-1 squeeze/amd64 also triggers here...
    > > >
    > > > Still, just "stat: cannot stat `proc/2/exe': No such file or directory" here...
    > >
    > > Interesting... Which gcc version is used?
    >
    > Argh... OK, going through aranym with debugger has exhonorated it. My
    > apologies ;-/ It *is* gcc in sid. Testcase:
    >
    > extern int foo(int);
    > void *bar(int n)
    > {
    > return (void *)foo(n);
    > }
    >
    > and gcc -S -O2 turns that into
    > bar:
    > link.w %fp,#0
    > unlk %fp
    > jra foo
    >
    > Spot the obvious bug... BTW, why on the Earth does debian-ports m68k tree
    > use gcc-4.3 with Cthulhu-scaring 700Kb gzipped patch and does *not* have
    > gcc-4.4?

    I can confirm that the bug exists in gcc-4.3.4 and gcc-4.4.5,
    but it has been fixed in gcc-4.5.1 which generates:

    bar:
    link.w %fp,#0
    move.l 8(%fp),-(%sp)
    jsr foo
    move.l %d0,%a0
    unlk %fp
    rts

    I don't yet know the gcc PR number or svn commit # for the fix
    (in case people want a backport).


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