Add __private_ss to s390 struct tcbhead.

Preparation for gcc -fsplit-stack support (gcc bug #68191). The new field is basically identical to the one on x86. Its TCB offset needs to be constant, as it'll be hardcoded in gcc. ChangeLog: * sysdeps/s390/nptl/tls.h (struct tcbhead_t): Add __private_ss field.
git-mirror · Jan 14, 2016 · a4b5177 · a4b5177
1 parent 67fc563
commit a4b5177
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diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,7 @@
+2016-01-02  Marcin Kościelnicki  <koriakin@0x04.net>
+
+	* sysdeps/s390/nptl/tls.h (struct tcbhead_t): Add __private_ss field.
+
 2016-01-13  Carlos O'Donell  <carlos@redhat.com>
 
 	* benchtests/Makefile (PYTHON): Define.

diff --git a/sysdeps/s390/nptl/tls.h b/sysdeps/s390/nptl/tls.h
@@ -53,7 +53,11 @@ typedef struct
   int gscope_flag;
 #ifndef __ASSUME_PRIVATE_FUTEX
   int private_futex;
+#else
+  int __glibc_reserved1;
 #endif
+  /* GCC split stack support.  */
+  void *__private_ss;
 } tcbhead_t;
 
 # ifndef __s390x__