[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)
- Cyrill -
--
