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stackprotector: update make rules

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Impact: no default -fno-stack-protector if stackp is enabled, cleanup

Stackprotector make rules had the following problems.

* cc support test and warning are scattered across makefile and
  kernel/panic.c.

* -fno-stack-protector was always added regardless of configuration.

Update such that cc support test and warning are contained in makefile
and -fno-stack-protector is added iff stackp is turned off.  While at
it, prepare for 32bit support.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tejun Heo
2009-02-09 22:17:39 +09:00
committed by Ingo Molnar
parent 76397f72fb
commit 5d707e9c8e
4 changed files with 15 additions and 13 deletions
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4
kernel/panic.c
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@@ -359,10 +359,6 @@ EXPORT_SYMBOL(warn_slowpath);
#ifdef CONFIG_CC_STACKPROTECTOR
#ifndef GCC_HAS_SP
#warning You have selected the CONFIG_CC_STACKPROTECTOR option, but the gcc used does not support this.
#endif
/*
* Called when gcc's -fstack-protector feature is used, and
* gcc detects corruption of the on-stack canary value