Messages in this thread Patch in this message |  | | From | Andi Kleen <> | Subject | [PATCH 10/14] asmlinkage Make __stack_chk_failed and memcmp visible | Date | Sat, 8 Feb 2014 08:52:06 +0100 |
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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> --- 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; -- 1.8.5.2
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