S/390: Revert the jmp_buf/ucontext_t ABI change.

1 files changed, 74 insertions, 0 deletions

diff --git a/sysdeps/s390/s390-64/__longjmp.c b/sysdeps/s390/s390-64/__longjmp.c
new file mode 100644
index 0000000000..168ebf562b
--- /dev/null
+++ b/sysdeps/s390/s390-64/__longjmp.c
@@ -0,0 +1,74 @@
+/* Copyright (C) 2001-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
+
+   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 Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <sysdep.h>
+#include <setjmp.h>
+#include <bits/setjmp.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* Jump to the position specified by ENV, causing the
+   setjmp call there to return VAL, or 1 if VAL is 0.  */
+void
+__longjmp (__jmp_buf env, int val)
+{
+#ifdef PTR_DEMANGLE
+  uintptr_t guard = THREAD_GET_POINTER_GUARD ();
+# ifdef CHECK_SP
+  CHECK_SP (env, guard);
+# endif
+#elif defined CHECK_SP
+  CHECK_SP (env, 0);
+#endif
+  register long int r2 __asm ("%r2") = val == 0 ? 1 : val;
+#ifdef PTR_DEMANGLE
+  register uintptr_t r3 __asm ("%r3") = guard;
+  register void *r1 __asm ("%r1") = (void *) env;
+#endif
+  /* Restore registers and jump back.  */
+  asm volatile ("ld    %%f8,80(%1)\n\t"
+		"ld    %%f9,88(%1)\n\t"
+		"ld    %%f10,96(%1)\n\t"
+		"ld    %%f11,104(%1)\n\t"
+		"ld    %%f12,112(%1)\n\t"
+		"ld    %%f13,120(%1)\n\t"
+		"ld    %%f14,128(%1)\n\t"
+		"ld    %%f15,136(%1)\n\t"
+#ifdef PTR_DEMANGLE
+		"lmg  %%r6,%%r13,0(%1)\n\t"
+		"lmg  %%r4,%%r5,64(%1)\n\t"
+		"xgr  %%r4,%2\n\t"
+		"xgr  %%r5,%2\n\t"
+		"lgr  %%r15,%%r5\n\t"
+		"br   %%r4"
+#else
+		"lmg  %%r6,%%r15,0(%1)\n\t"
+		"br   %%r14"
+#endif
+		: : "r" (r2),
+#ifdef PTR_DEMANGLE
+		    "r" (r1), "r" (r3)
+#else
+		    "a" (env)
+#endif
+		);
+
+  /* Avoid `volatile function does return' warnings.  */
+  for (;;);
+}