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authorMarkos Chandras <markos.chandras@imgtec.com>2013-02-12 13:44:25 +0000
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2013-02-27 22:16:20 +0100
commit60c1fe7f456b1cd17c71ea6a9c4a234d9f147b7b (patch)
treefb5f6f1cc294ab01789d82f5fc9eeb42a2acf32e /libpthread/nptl/allocatestack.c
parent49d3f93362c7eb359f82a4d9204a0519f73f3820 (diff)
nptl/allocatestack.c: Fix stack mprotect alignment for STACK_GROWS_UP
mprotect() expects the first argument to be aligned to a page boundary. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libpthread/nptl/allocatestack.c')
-rw-r--r--libpthread/nptl/allocatestack.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libpthread/nptl/allocatestack.c b/libpthread/nptl/allocatestack.c
index 9399c2a63..3f0586d28 100644
--- a/libpthread/nptl/allocatestack.c
+++ b/libpthread/nptl/allocatestack.c
@@ -645,7 +645,7 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp,
prot) != 0)
goto mprot_error;
#elif defined _STACK_GROWS_UP
- if (mprotect ((char *) pd - pd->guardsize,
+ if (mprotect ((char *) (((uintptr_t) pd - pd->guardsize) & ~pagesize_m1),
pd->guardsize - guardsize, prot) != 0)
goto mprot_error;
#endif