Messages in this thread Patch in this message | | | Date | Mon, 19 May 2008 20:11:18 +0200 | From | Sam Ravnborg <> | Subject | Re: /proc/kallsyms broken in 2.6.26-rc1-git6 |
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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
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