Put back include to tm-hppa.h mistakenly taken out during a recent checkin.

gdb/config/pa/tm-hppah.h

@@ -20,14 +20,56 @@ You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
-/* Mostly it's common to all HPPA's.  */
-#include "pa/tm-hppa.h"
 
-/* Saved PC's are different, since there is millicode.  */
-extern CORE_ADDR millicode_start, millicode_end;
+/* Actually, for a PA running HPUX the kernel calls the signal handler
+   without an intermediate trampoline.  Luckily the kernel always sets
+   the return pointer for the signal handler to point to _sigreturn.  */
+#define IN_SIGTRAMP(pc, name) (name && STREQ ("_sigreturn", name))
+
+/* For HPUX:
+
+   The signal context structure pointer is always saved at the base
+   of the frame which "calls" the signal handler.  We only want to find
+   the hardware save state structure, which lives 10 32bit words into
+   sigcontext structure.
+
+   Within the hardware save state structure, registers are found in the
+   same order as the register numbers in GDB.
+
+   The kernel apparently sets %r31 in the saved state structure to point
+   to the active instruction when the signal was taken.  Everything
+   else looks fairly reasonable.  (I assume the kernel fixes %r31 from
+   within _sigreturn?.  */
+
+#define FRAME_SAVED_PC_IN_SIGTRAMP(FRAME, TMP) \
+{ \
+  *(TMP) = read_memory_integer ((FRAME)->frame + (41 * 4) , 4); \
+}
+
+#define FRAME_BASE_BEFORE_SIGTRAMP(FRAME, TMP) \
+{ \
+  *(TMP) = read_memory_integer ((FRAME)->frame + (40 * 4), 4); \
+}
+
+#define FRAME_FIND_SAVED_REGS_IN_SIGTRAMP(FRAME, FSR) \
+{ \
+  int i; \
+  CORE_ADDR TMP; \
+  TMP = (FRAME)->frame + (10 * 4); \
+  for (i = 0; i < NUM_REGS; i++) \
+    { \
+      if (i == SP_REGNUM) \
+	(FSR)->regs[SP_REGNUM] = read_memory_integer (TMP + SP_REGNUM * 4, 4); \
+      else \
+	(FSR)->regs[i] = TMP + i * 4; \
+    } \
+}
 
 /* We need to figure out where the text region is so that we use the
    appropriate ptrace operator to manipulate text.  Simply reading/writing
    user space will crap out HPUX.  */
 
 #define NEED_TEXT_START_END
+
+/* Mostly it's common to all HPPA's.  */
+#include "pa/tm-hppa.h"