[git commit] nptl/allocatestack.c: Fix stack mprotect alignment for STACK_GROWS_UP
Bernhard Reutner-Fischer
rep.dot.nop at gmail.com
Wed Feb 27 21:16:20 UTC 2013
commit: http://git.uclibc.org/uClibc/commit/?id=60c1fe7f456b1cd17c71ea6a9c4a234d9f147b7b
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/master
mprotect() expects the first argument to be aligned to a page boundary.
Signed-off-by: Markos Chandras <markos.chandras at imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop at gmail.com>
---
libpthread/nptl/allocatestack.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/libpthread/nptl/allocatestack.c b/libpthread/nptl/allocatestack.c
index 9399c2a..3f0586d 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
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