Messages in this thread Patch in this message |  | | Date | Thu, 13 Feb 2014 19:59:27 -0800 | From | tip-bot for Andi Kleen <> | Subject | [tip:x86/asmlinkage] asmlinkage Make __stack_chk_failed and memcmp visible |
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Commit-ID: a7330c997d0f74d909a7d3553b1d550d8be2b61a Gitweb: http://git.kernel.org/tip/a7330c997d0f74d909a7d3553b1d550d8be2b61a Author: Andi Kleen <ak@linux.intel.com> AuthorDate: Sat, 8 Feb 2014 08:52:06 +0100 Committer: H. Peter Anvin <hpa@linux.intel.com> CommitDate: Thu, 13 Feb 2014 18:13:43 -0800
asmlinkage Make __stack_chk_failed and memcmp visible
In LTO symbols implicitely referenced by the compiler need to be visible. Earlier these symbols were visible implicitely from being exported, but we disabled implicit visibility fo EXPORTs when modules are disabled to improve code size. So now these symbols have to be marked visible explicitely.
Do this for __stack_chk_fail (with stack protector) and memcmp.
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1391845930-28580-10-git-send-email-ak@linux.intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> --- kernel/panic.c | 2 +- lib/string.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/panic.c b/kernel/panic.c index 6d63003..3eb0ffb 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -459,7 +459,7 @@ EXPORT_SYMBOL(warn_slowpath_null); * Called when gcc's -fstack-protector feature is used, and * gcc detects corruption of the on-stack canary value */ -void __stack_chk_fail(void) +__visible void __stack_chk_fail(void) { panic("stack-protector: Kernel stack is corrupted in: %p\n", __builtin_return_address(0)); diff --git a/lib/string.c b/lib/string.c index e5878de..9b1f906 100644 --- a/lib/string.c +++ b/lib/string.c @@ -648,7 +648,7 @@ EXPORT_SYMBOL(memmove); * @count: The size of the area. */ #undef memcmp -int memcmp(const void *cs, const void *ct, size_t count) +__visible int memcmp(const void *cs, const void *ct, size_t count) { const unsigned char *su1, *su2; int res = 0;
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