hppa: Add ____longjmp_check C implementation.

diff --git a/ports/sysdeps/unix/sysv/linux/hppa/____longjmp_chk.c b/ports/sysdeps/unix/sysv/linux/hppa/____longjmp_chk.c
new file mode 100644 (file)
index 0000000..46357dd
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/hppa/____longjmp_chk.c
@@ -0,0 +1,47 @@
+/* Copyright (C) 2009-2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING.  If not, write to the Free
+   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#include <stdio.h>
+#include <signal.h>
+#include <sysdep.h>
+#define __longjmp ____longjmp_chk
+#define CHECK_SP(sp)                                                   \
+  do {                                                                 \
+    register unsigned long this_sp asm ("r30");                                \
+    /* The stack grows up, therefore frames that were created and then \
+       destroyed must all have stack values higher than ours.  */      \
+    if ((unsigned long) (sp) > this_sp)                                        \
+      {                                                                        \
+        struct sigaltstack oss;                                                \
+        INTERNAL_SYSCALL_DECL (err);                                   \
+        int result = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss);\
+       /* If we aren't using an alternate stack then we have already   \
+          shown that we are jumping to a frame that doesn't exist so   \
+          error out. If we are using an alternate stack we must prove  \
+          that we are jumping *out* of the alternate stack. Note that  \
+          the check for that is the same as that for _STACK_GROWS_UP   \
+          as for _STACK_GROWS_DOWN.  */                                \
+        if (!INTERNAL_SYSCALL_ERROR_P (result, err)                    \
+            && ((oss.ss_flags & SS_ONSTACK) == 0                       \
+                || ((unsigned long) oss.ss_sp + oss.ss_size            \
+                    - (unsigned long) (sp)) < oss.ss_size))            \
+          __fortify_fail ("longjmp causes uninitialized stack frame"); \
+      }                                                                        \
+  } while (0)
+
+#include <__longjmp.c>