| commit | 05d0b0889ca9d033a960542af7f8a13b3ad4f630 | |
| author | H. Peter Anvin <hpa@linux.intel.com> | |
| Fri, 18 Jun 2010 21:36:26 +0000 (18 14:36 -0700) | ||
| committer | H. Peter Anvin <hpa@linux.intel.com> | |
| Fri, 18 Jun 2010 21:46:21 +0000 (18 14:46 -0700) | ||
| tree | f77ab36957838f0a262ac6efab1201dd5b8f0593 | treesnapshot (tar.gz zip) |
| parent | 7e27d6e778cd87b6f2415515d7127eba53fe5d02 | commitdiff |
x86, vdso: Error out if the vdso contains external references
The vdso is a piece of userspace code which is supposed to be fully
self-contained. Any external (undefined) reference is an error, and
should be caught at compile time. This was giving us trouble when
compiling with -Os on gcc 4.5.0, for example (failed inline).
The need to do a buildtime check was pointed out by Andi Kleen.
Reported-by: Andi Kleen <andi@firstfloor.org>
LKML-Reference: <tip-*@vger.kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
The vdso is a piece of userspace code which is supposed to be fully
self-contained. Any external (undefined) reference is an error, and
should be caught at compile time. This was giving us trouble when
compiling with -Os on gcc 4.5.0, for example (failed inline).
The need to do a buildtime check was pointed out by Andi Kleen.
Reported-by: Andi Kleen <andi@firstfloor.org>
LKML-Reference: <tip-*@vger.kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| arch/x86/vdso/Makefile | diffblobblamehistory | |
| arch/x86/vdso/checkundef.sh | [new file with mode: 0755] | blob |