1 files changed, 124 insertions, 0 deletions
diff --git a/src/vppinfra/longjmp.h b/src/vppinfra/longjmp.h
new file mode 100644
index 00000000000..8d83203e41d
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+++ b/src/vppinfra/longjmp.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+  Copyright (c) 2005 Eliot Dresselhaus
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef included_clib_longjmp_h
+#define included_clib_longjmp_h
+
+#include <vppinfra/types.h>
+
+#if defined(__x86_64__)
+/* rbx, rbp, r12, r13, r14, r15, eip, rsp */
+#define CLIB_ARCH_LONGJMP_REGS 8
+
+#elif defined(i386)
+/* ebx, ebp, esi, edi, eip, rsp */
+#define CLIB_ARCH_LONGJMP_REGS 6
+
+#elif (defined(__powerpc64__) || defined(__powerpc__))
+
+#ifdef __ALTIVEC__
+#define CLIB_POWERPC_ALTIVEC_N_REGS 12
+#else
+#define CLIB_POWERPC_ALTIVEC_N_REGS 0
+#endif
+
+/* r1 r2 link condition+vsave regs 14-31 fp regs 14-31 vector regs 20-31 */
+#define CLIB_ARCH_LONGJMP_REGS				\
+  (/* r1 lr cr vrsave */				\
+   4							\
+   /* gp */						\
+   + (31 - 14 + 1)					\
+   /* fp */						\
+   + (sizeof (f64) / sizeof (uword)) * (31 - 14 + 1)	\
+   /* vector regs */					\
+   + (16 / sizeof (uword)) * CLIB_POWERPC_ALTIVEC_N_REGS)
+
+#elif defined(__SPU__)
+/* FIXME */
+#define CLIB_ARCH_LONGJMP_REGS (10)
+
+#elif defined(__arm__)
+
+#ifndef __IWMMXT__
+/* v1-v6 sl fp sp lr */
+#define CLIB_ARCH_LONGJMP_REGS (10)
+#else
+/* For iwmmxt we save 6 extra 8 byte registers. */
+#define CLIB_ARCH_LONGJMP_REGS (10 + (6*2))
+#endif
+
+#elif defined(__xtensa__)
+
+/* setjmp/longjmp not supported for the moment. */
+#define CLIB_ARCH_LONGJMP_REGS 0
+
+#elif defined(__TMS320C6X__)
+
+/* setjmp/longjmp not supported for the moment. */
+#define CLIB_ARCH_LONGJMP_REGS 0
+
+#elif defined(__aarch64__)
+#define CLIB_ARCH_LONGJMP_REGS (22)
+#else
+#error "unknown machine"
+#endif
+
+typedef struct
+{
+  uword regs[CLIB_ARCH_LONGJMP_REGS];
+} clib_longjmp_t __attribute__ ((aligned (16)));
+
+/* Return given value to saved context. */
+void clib_longjmp (clib_longjmp_t * save, uword return_value);
+
+/* Save context.  Returns given value if jump is not taken;
+   otherwise returns value from clib_longjmp if long jump is taken. */
+uword clib_setjmp (clib_longjmp_t * save, uword return_value_not_taken);
+
+/* Call function on given stack. */
+uword clib_calljmp (uword (*func) (uword func_arg),
+		    uword func_arg, void *stack);
+
+#endif /* included_clib_longjmp_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */