X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gdb%2Ftracefile.c;h=0b89cfa4981ff74677a6af4167916bca9baf5f3b;hb=fab39d55fa914ad1cea809848899c76c64eaab9d;hp=508f898dfe676e4f4052a90f0fbfbeec2fce6b60;hpb=a283690eb7320dfe4074301c673f6cc3dd21fb11;p=platform%2Fupstream%2Fbinutils.git

diff --git a/gdb/tracefile.c b/gdb/tracefile.c
index 508f898..0b89cfa 100644
--- a/gdb/tracefile.c
+++ b/gdb/tracefile.c
@@ -20,6 +20,8 @@
 #include "defs.h"
 #include "tracefile.h"
 #include "ctf.h"
+#include "exec.h"
+#include "regcache.h"
 
 /* Helper macros.  */
 
@@ -376,6 +378,66 @@ trace_save_ctf (const char *dirname, int target_does_save)
   do_cleanups (back_to);
 }
 
+/* Fetch register data from tracefile, shared for both tfile and
+   ctf.  */
+
+void
+tracefile_fetch_registers (struct regcache *regcache, int regno)
+{
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  int regn, pc_regno;
+
+  /* We get here if no register data has been found.  Mark registers
+     as unavailable.  */
+  for (regn = 0; regn < gdbarch_num_regs (gdbarch); regn++)
+    regcache_raw_supply (regcache, regn, NULL);
+
+  /* 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))
+    return;
+
+  if (regno == -1 || regno == pc_regno)
+    {
+      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 = 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);
+	}
+    }
+}
+
 /* This is the implementation of target_ops method to_has_all_memory.  */
 
 static int