nptl: Move semi-public __pthread_get_minstack symbol into libc

No abilist updates here because it is a GLIBC_PRIVATE symbol.

It's also necessary to move nptl_version into pthread_create, so
that it still ends up in static binaries.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/nptl/nptl-stack.c b/nptl/nptl-stack.c
index 7853c105be..1a0c460ba8 100644
--- a/nptl/nptl-stack.c
+++ b/nptl/nptl-stack.c
@@ -19,6 +19,7 @@
 
 #include <nptl-stack.h>
 #include <ldsodefs.h>
+#include <pthreadP.h>
 
 /* Maximum size in kB of cache.  40MiBi by default.  */
 static const size_t stack_cache_maxsize = 40 * 1024 * 1024;
@@ -128,3 +129,19 @@ __nptl_deallocate_stack (struct pthread *pd)
   lll_unlock (GL (dl_stack_cache_lock), LLL_PRIVATE);
 }
 libc_hidden_def (__nptl_deallocate_stack)
+
+/* This function is internal (it has a GLIBC_PRIVATE) version, but it
+   is widely used (either via weak symbol, or dlsym) to obtain the
+   __static_tls_size value.  This value is then used to adjust the
+   value of the stack size attribute, so that applications receive the
+   full requested stack size, not diminished by the TCB and static TLS
+   allocation on the stack.  Once the TCB is separately allocated,
+   this function should be removed or renamed (if it is still
+   necessary at that point).  */
+size_t
+__pthread_get_minstack (const pthread_attr_t *attr)
+{
+  return (GLRO(dl_pagesize) + __nptl_tls_static_size_for_stack ()
+	  + PTHREAD_STACK_MIN);
+}
+libc_hidden_def (__pthread_get_minstack)