[git commit prelink 1/1] nptl: fix start_thread() for _STACK_GROWS_UP
Will Newton
will.newton at imgtec.com
Thu Jan 27 15:11:14 UTC 2011
commit: http://git.uclibc.org/uClibc/commit/?id=5c02df4f734011cccc65441e5dae2f5c18447f39
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/prelink
This patch adds a working implementation of pthread_create for architectures
where STACK_GROWS_UP.
Signed-off-by: Matt Fleming <matthew.fleming at imgtec.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso at st.com>
---
libpthread/nptl/pthread_create.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/libpthread/nptl/pthread_create.c b/libpthread/nptl/pthread_create.c
index 63e5588..86ff148 100644
--- a/libpthread/nptl/pthread_create.c
+++ b/libpthread/nptl/pthread_create.c
@@ -379,11 +379,11 @@ start_thread (void *arg)
/* Mark the memory of the stack as usable to the kernel. We free
everything except for the space used for the TCB itself. */
size_t pagesize_m1 = __getpagesize () - 1;
-#ifdef _STACK_GROWS_DOWN
char *sp = CURRENT_STACK_FRAME;
+#ifdef _STACK_GROWS_DOWN
size_t freesize = (sp - (char *) pd->stackblock) & ~pagesize_m1;
#else
-# error "to do"
+ size_t freesize = ((char *) pd->stackblock - sp) & ~pagesize_m1;
#endif
assert (freesize < pd->stackblock_size);
if (freesize > PTHREAD_STACK_MIN)
--
1.7.3.4
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