diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e507dd1..74b0f05 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2016-02-18  Marcin KoÅ›cielnicki  <koriakin@0x04.net>
+
+	* gdbarch.c: Regenerate.
+	* gdbarch.h: Regenerate.
+	* gdbarch.sh: Add guess_tracepoint_registers hook, include
+	tracepoint.h.
+	* tracefile.c (tracefile_fetch_registers): Use the new gdbarch hook.
+	* tracepoint.c (default_guess_tracepoint_registers): New function.
+	* tracepoint.h (default_guess_tracepoint_registers): New prototype.
+
 2016-02-17  Gary Benson  <gbenson@redhat.com>
 
 	* exec.c (exec_file_locate_attach): Add missing cleanup.
diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index 4143744..532b259 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -47,6 +47,7 @@
 #include "observer.h"
 #include "regcache.h"
 #include "objfiles.h"
+#include "tracepoint.h"
 
 /* Static function declarations */
 
@@ -312,6 +313,7 @@ struct gdbarch
   int has_global_breakpoints;
   gdbarch_has_shared_address_space_ftype *has_shared_address_space;
   gdbarch_fast_tracepoint_valid_at_ftype *fast_tracepoint_valid_at;
+  gdbarch_guess_tracepoint_registers_ftype *guess_tracepoint_registers;
   gdbarch_auto_charset_ftype *auto_charset;
   gdbarch_auto_wide_charset_ftype *auto_wide_charset;
   const char * solib_symbols_extension;
@@ -419,6 +421,7 @@ gdbarch_alloc (const struct gdbarch_info *info,
   gdbarch->relocate_instruction = NULL;
   gdbarch->has_shared_address_space = default_has_shared_address_space;
   gdbarch->fast_tracepoint_valid_at = default_fast_tracepoint_valid_at;
+  gdbarch->guess_tracepoint_registers = default_guess_tracepoint_registers;
   gdbarch->auto_charset = default_auto_charset;
   gdbarch->auto_wide_charset = default_auto_wide_charset;
   gdbarch->gen_return_address = default_gen_return_address;
@@ -658,6 +661,7 @@ verify_gdbarch (struct gdbarch *gdbarch)
   /* Skip verify of has_global_breakpoints, invalid_p == 0 */
   /* Skip verify of has_shared_address_space, invalid_p == 0 */
   /* Skip verify of fast_tracepoint_valid_at, invalid_p == 0 */
+  /* Skip verify of guess_tracepoint_registers, invalid_p == 0 */
   /* Skip verify of auto_charset, invalid_p == 0 */
   /* Skip verify of auto_wide_charset, invalid_p == 0 */
   /* Skip verify of has_dos_based_file_system, invalid_p == 0 */
@@ -1024,6 +1028,9 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
                       "gdbarch_dump: gnu_triplet_regexp = <%s>\n",
                       host_address_to_string (gdbarch->gnu_triplet_regexp));
   fprintf_unfiltered (file,
+                      "gdbarch_dump: guess_tracepoint_registers = <%s>\n",
+                      host_address_to_string (gdbarch->guess_tracepoint_registers));
+  fprintf_unfiltered (file,
                       "gdbarch_dump: half_bit = %s\n",
                       plongest (gdbarch->half_bit));
   fprintf_unfiltered (file,
@@ -4450,6 +4457,23 @@ set_gdbarch_fast_tracepoint_valid_at (struct gdbarch *gdbarch,
   gdbarch->fast_tracepoint_valid_at = fast_tracepoint_valid_at;
 }
 
+void
+gdbarch_guess_tracepoint_registers (struct gdbarch *gdbarch, struct regcache *regcache, CORE_ADDR addr)
+{
+  gdb_assert (gdbarch != NULL);
+  gdb_assert (gdbarch->guess_tracepoint_registers != NULL);
+  if (gdbarch_debug >= 2)
+    fprintf_unfiltered (gdb_stdlog, "gdbarch_guess_tracepoint_registers called\n");
+  gdbarch->guess_tracepoint_registers (gdbarch, regcache, addr);
+}
+
+void
+set_gdbarch_guess_tracepoint_registers (struct gdbarch *gdbarch,
+                                        gdbarch_guess_tracepoint_registers_ftype guess_tracepoint_registers)
+{
+  gdbarch->guess_tracepoint_registers = guess_tracepoint_registers;
+}
+
 const char *
 gdbarch_auto_charset (struct gdbarch *gdbarch)
 {
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index 3fadcd1..7ffbf1f 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -1327,6 +1327,15 @@ typedef int (gdbarch_fast_tracepoint_valid_at_ftype) (struct gdbarch *gdbarch, C
 extern int gdbarch_fast_tracepoint_valid_at (struct gdbarch *gdbarch, CORE_ADDR addr, char **msg);
 extern void set_gdbarch_fast_tracepoint_valid_at (struct gdbarch *gdbarch, gdbarch_fast_tracepoint_valid_at_ftype *fast_tracepoint_valid_at);
 
+/* Guess register state based on tracepoint location.  Used for tracepoints
+   where no registers have been collected, but there's only one location,
+   allowing us to guess the PC value, and perhaps some other registers.
+   On entry, regcache has all registers marked as unavailable. */
+
+typedef void (gdbarch_guess_tracepoint_registers_ftype) (struct gdbarch *gdbarch, struct regcache *regcache, CORE_ADDR addr);
+extern void gdbarch_guess_tracepoint_registers (struct gdbarch *gdbarch, struct regcache *regcache, CORE_ADDR addr);
+extern void set_gdbarch_guess_tracepoint_registers (struct gdbarch *gdbarch, gdbarch_guess_tracepoint_registers_ftype *guess_tracepoint_registers);
+
 /* Return the "auto" target charset. */
 
 typedef const char * (gdbarch_auto_charset_ftype) (void);
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 4ac6b90..18990db 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -1028,6 +1028,12 @@ m:int:has_shared_address_space:void:::default_has_shared_address_space::0
 # True if a fast tracepoint can be set at an address.
 m:int:fast_tracepoint_valid_at:CORE_ADDR addr, char **msg:addr, msg::default_fast_tracepoint_valid_at::0
 
+# Guess register state based on tracepoint location.  Used for tracepoints
+# where no registers have been collected, but there's only one location,
+# allowing us to guess the PC value, and perhaps some other registers.
+# On entry, regcache has all registers marked as unavailable.
+m:void:guess_tracepoint_registers:struct regcache *regcache, CORE_ADDR addr:regcache, addr::default_guess_tracepoint_registers::0
+
 # Return the "auto" target charset.
 f:const char *:auto_charset:void::default_auto_charset:default_auto_charset::0
 # Return the "auto" target wide charset.
@@ -1599,6 +1605,7 @@ cat <<EOF
 #include "observer.h"
 #include "regcache.h"
 #include "objfiles.h"
+#include "tracepoint.h"
 
 /* Static function declarations */
 
diff --git a/gdb/tracefile.c b/gdb/tracefile.c
index de42165..609b7e5 100644
--- a/gdb/tracefile.c
+++ b/gdb/tracefile.c
@@ -388,7 +388,8 @@ void
 tracefile_fetch_registers (struct regcache *regcache, int regno)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
-  int regn, pc_regno;
+  struct tracepoint *tp = get_tracepoint (get_tracepoint_number ());
+  int regn;
 
   /* We get here if no register data has been found.  Mark registers
      as unavailable.  */
@@ -397,48 +398,29 @@ tracefile_fetch_registers (struct regcache *regcache, int regno)
 
   /* We can often usefully guess that the PC is going to be the same
      as the address of the tracepoint.  */
-  pc_regno = gdbarch_pc_regnum (gdbarch);
-
-  /* XXX This guessing code below only works if the PC register isn't
-     a pseudo-register.  The value of a pseudo-register isn't stored
-     in the (non-readonly) regcache -- instead it's recomputed
-     (probably from some other cached raw register) whenever the
-     register is read.  This guesswork should probably move to some
-     higher layer.  */
-  if (pc_regno < 0 || pc_regno >= gdbarch_num_regs (gdbarch))
+  if (tp == NULL || tp->base.loc == NULL)
     return;
 
-  if (regno == -1 || regno == pc_regno)
+  /* But don't try to guess if tracepoint is multi-location...  */
+  if (tp->base.loc->next)
     {
-      struct tracepoint *tp = get_tracepoint (get_tracepoint_number ());
-      gdb_byte *regs;
-
-      if (tp && tp->base.loc)
-	{
-	  /* But don't try to guess if tracepoint is multi-location...  */
-	  if (tp->base.loc->next)
-	    {
-	      warning (_("Tracepoint %d has multiple "
-			 "locations, cannot infer $pc"),
-		       tp->base.number);
-	      return;
-	    }
-	  /* ... or does while-stepping.  */
-	  if (tp->step_count > 0)
-	    {
-	      warning (_("Tracepoint %d does while-stepping, "
-			 "cannot infer $pc"),
-		       tp->base.number);
-	      return;
-	    }
-
-	  regs = (gdb_byte *) alloca (register_size (gdbarch, pc_regno));
-	  store_unsigned_integer (regs, register_size (gdbarch, pc_regno),
-				  gdbarch_byte_order (gdbarch),
-				  tp->base.loc->address);
-	  regcache_raw_supply (regcache, pc_regno, regs);
-	}
+      warning (_("Tracepoint %d has multiple "
+		 "locations, cannot infer $pc"),
+	       tp->base.number);
+      return;
+    }
+  /* ... or does while-stepping.  */
+  else if (tp->step_count > 0)
+    {
+      warning (_("Tracepoint %d does while-stepping, "
+		 "cannot infer $pc"),
+	       tp->base.number);
+      return;
     }
+
+  /* Guess what we can from the tracepoint location.  */
+  gdbarch_guess_tracepoint_registers (gdbarch, regcache,
+				      tp->base.loc->address);
 }
 
 /* This is the implementation of target_ops method to_has_all_memory.  */
diff --git a/gdb/tracepoint.c b/gdb/tracepoint.c
index 8b393db..198fc65 100644
--- a/gdb/tracepoint.c
+++ b/gdb/tracepoint.c
@@ -4341,6 +4341,29 @@ traceframe_available_memory (VEC(mem_range_s) **result,
   return 0;
 }
 
+void
+default_guess_tracepoint_registers (struct gdbarch *gdbarch,
+				    struct regcache *regcache,
+				    CORE_ADDR addr)
+{
+  int pc_regno = gdbarch_pc_regnum (gdbarch);
+  gdb_byte *regs;
+
+  /* This guessing code below only works if the PC register isn't
+     a pseudo-register.  The value of a pseudo-register isn't stored
+     in the (non-readonly) regcache -- instead it's recomputed
+     (probably from some other cached raw register) whenever the
+     register is read.  In this case, a custom method implementation
+     should be used by the architecture.  */
+  if (pc_regno < 0 || pc_regno >= gdbarch_num_regs (gdbarch))
+    return;
+
+  regs = (gdb_byte *) alloca (register_size (gdbarch, pc_regno));
+  store_unsigned_integer (regs, register_size (gdbarch, pc_regno),
+			  gdbarch_byte_order (gdbarch), addr);
+  regcache_raw_supply (regcache, pc_regno, regs);
+}
+
 /* Implementation of `sdata' variable.  */
 
 static const struct internalvar_funcs sdata_funcs =
diff --git a/gdb/tracepoint.h b/gdb/tracepoint.h
index 8985394..2cff32a 100644
--- a/gdb/tracepoint.h
+++ b/gdb/tracepoint.h
@@ -353,4 +353,8 @@ extern struct traceframe_info *get_traceframe_info (void);
 
 extern struct bp_location *get_traceframe_location (int *stepping_frame_p);
 
+extern void default_guess_tracepoint_registers (struct gdbarch *gdbarch,
+						struct regcache *regcache,
+						CORE_ADDR addr);
+
 #endif	/* TRACEPOINT_H */
