Messages in this thread | | | Date | Mon, 19 May 2008 22:15:43 +0400 | From | Cyrill Gorcunov <> | Subject | Re: /proc/kallsyms broken in 2.6.26-rc1-git6 |
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[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 -
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