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diff --git a/src/pal/src/libunwind/include/libunwind-hppa.h b/src/pal/src/libunwind/include/libunwind-hppa.h
new file mode 100644
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+++ b/src/pal/src/libunwind/include/libunwind-hppa.h
@@ -0,0 +1,125 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003-2004 Hewlett-Packard Co
+
+This file is part of libunwind.
+
+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 LIBUNWIND_H
+#define LIBUNWIND_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include <inttypes.h>
+#include <ucontext.h>
+
+#define UNW_TARGET      hppa
+#define UNW_TARGET_HPPA 1
+
+#define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
+
+/* This needs to be big enough to accommodate "struct cursor", while
+   leaving some slack for future expansion.  Changing this value will
+   require recompiling all users of this library.  Stack allocation is
+   relatively cheap and unwind-state copying is relatively rare, so we
+   want to err on making it rather too big than too small.  */
+#define UNW_TDEP_CURSOR_LEN     511
+
+typedef uint32_t unw_word_t;
+typedef int32_t unw_sword_t;
+
+typedef union
+  {
+    struct { unw_word_t bits[2]; } raw;
+    double val;
+  }
+unw_tdep_fpreg_t;
+
+typedef enum
+  {
+    /* Note: general registers are expected to start with index 0.
+       This convention facilitates architecture-independent
+       implementation of the C++ exception handling ABI.  See
+       _Unwind_SetGR() and _Unwind_GetGR() for details.  */
+    UNW_HPPA_GR = 0,
+     UNW_HPPA_RP = 2,                   /* return pointer */
+     UNW_HPPA_FP = 3,                   /* frame pointer */
+     UNW_HPPA_SP = UNW_HPPA_GR + 30,
+
+    UNW_HPPA_FR = UNW_HPPA_GR + 32,
+
+    UNW_HPPA_IP = UNW_HPPA_FR + 32,     /* instruction pointer */
+
+    /* other "preserved" registers (fpsr etc.)... */
+
+    /* PA-RISC has 4 exception-argument registers but they're not
+       contiguous.  To deal with this, we define 4 pseudo
+       exception-handling registers which we then alias to the actual
+       physical register.  */
+
+    UNW_HPPA_EH0 = UNW_HPPA_IP + 1,     /* alias for UNW_HPPA_GR + 20 */
+    UNW_HPPA_EH1 = UNW_HPPA_EH0 + 1,    /* alias for UNW_HPPA_GR + 21 */
+    UNW_HPPA_EH2 = UNW_HPPA_EH1 + 1,    /* alias for UNW_HPPA_GR + 22 */
+    UNW_HPPA_EH3 = UNW_HPPA_EH2 + 1,    /* alias for UNW_HPPA_GR + 31 */
+
+    /* frame info (read-only) */
+    UNW_HPPA_CFA,
+
+    UNW_TDEP_LAST_REG = UNW_HPPA_IP,
+
+    UNW_TDEP_IP = UNW_HPPA_IP,
+    UNW_TDEP_SP = UNW_HPPA_SP,
+    UNW_TDEP_EH = UNW_HPPA_EH0
+  }
+hppa_regnum_t;
+
+#define UNW_TDEP_NUM_EH_REGS    4
+
+typedef struct unw_tdep_save_loc
+  {
+    /* Additional target-dependent info on a save location.  */
+  }
+unw_tdep_save_loc_t;
+
+/* On PA-RISC, we can directly use ucontext_t as the unwind context.  */
+typedef ucontext_t unw_tdep_context_t;
+
+#define unw_tdep_is_fpreg(r)            ((unsigned) ((r) - UNW_HPPA_FR) < 32)
+
+#include "libunwind-dynamic.h"
+
+typedef struct
+  {
+    /* no PA-RISC-specific auxiliary proc-info */
+  }
+unw_tdep_proc_info_t;
+
+#include "libunwind-common.h"
+
+#define unw_tdep_getcontext             UNW_ARCH_OBJ (getcontext)
+extern int unw_tdep_getcontext (unw_tdep_context_t *);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* LIBUNWIND_H */