Messages in this thread | | | Date | Mon, 19 May 2008 20:21:15 +0200 | From | Sam Ravnborg <> | Subject | Re: /proc/kallsyms broken in 2.6.26-rc1-git6 |
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On Mon, May 19, 2008 at 10:15:43PM +0400, Cyrill Gorcunov wrote: > [Sam Ravnborg - Mon, May 19, 2008 at 08:11:18PM +0200] > | On Tue, May 13, 2008 at 11:54:37AM +0200, Andi Kleen wrote: > | > > I expect it to be a toolchain issue. Andi is often running with gcc versions > | > > that are very new (fresh from svn maybe). I dunno about binutils. > | > > | > No actually that's a pretty old version from SUSE 10.2 > | > > | > gcc-4.1.3-29 > | > binutils-2.17.50.0.5-21 > | > > | > This means i've been recently trying to get the x86-64 kernel to work > | > with the new gold linker from binutils mainline, but it's far from > | > booting yet and was not used here. > | > > | > > To reproduce I would expect that a very recent gcc/binutils is needed. > | > > Andi? > | > > | > Just a SUSE 10.2 toolchain. You can probably rpm2cpio it from any > | > SUSE mirror. > | > | I have just commit the following that should fix it. > | > | Sam > | > | commit aab34ac8582303ef57b792710fc5dd5991477475 > | Author: Sam Ravnborg <sam@ravnborg.org> > | Date: Mon May 19 20:07:58 2008 +0200 > | > | kbuild: filter away debug symbols from kernel symbols > | > | Andi Kleen <andi@firstfloor.org> > | reported that he saw a lot of symbols like this: > | > | 0000000000000b24 N DW.aio.h.903a6d92.2 > | 0000000000000bce N DW.task_io_accounting.h.8d8de327.0 > | 0000000000000bec N DW.hrtimer.h.c23659c6.0 > | > | in his System.map / kallsyms output. > | > | Simple solution is to skip all debugging > | symbols (they are marked 'N'). > | > | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> > | Cc: Paulo Marques <pmarques@grupopie.com> > | > | diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c > | index 5d20a2e..ad2434b 100644 > | --- a/scripts/kallsyms.c > | +++ b/scripts/kallsyms.c > | @@ -108,6 +108,9 @@ static int read_symbol(FILE *in, struct sym_entry *s) > | /* exclude also MIPS ELF local symbols ($L123 instead of .L123) */ > | else if (str[0] == '$') > | return -1; > | + /* exclude debugging symbols */ > | + else if (stype == 'N') > | + return -1; > | > | /* include the type field in the symbol name, so that it gets > | * compressed together */ > | diff --git a/scripts/mksysmap b/scripts/mksysmap > | index 4390fab..6e133a0 100644 > | --- a/scripts/mksysmap > | +++ b/scripts/mksysmap > | @@ -32,6 +32,7 @@ > | # For System.map filter away: > | # a - local absolute symbols > | # U - undefined global symbols > | +# N - debugging symbols > | # w - local weak symbols > | > | # readprofile starts reading symbols when _stext is found, and > | @@ -40,5 +41,5 @@ > | # so we just ignore them to let readprofile continue to work. > | # (At least sparc64 has __crc_ in the middle). > | > | -$NM -n $1 | grep -v '\( [aUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2 > | +$NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2 > | > | > > Hi Sam, > > should not there be > > toupper(stype) == 'N' > > (just a guess)
I conisered this. But decided that we could do so if we needed it later. In the nm output I got they were all 'N'.
Sam
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