Messages in this thread |  | | | Date | Mon, 11 Oct 2010 11:27:17 +0200 | | From | Mikael Pettersson <> | | Subject | Re: aranym bug, manifests as "ida_remove called for id=13" on recent kernels |
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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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