2011-02-21 Hui Zhu <teawater@gmail.com>

	* tracepoint.c (tp_printf): New function.
	(eval_agent_expr): Handle gdb_agent_op_printf.

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 4d54d97..0f7655f 100644 (file)
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,8 @@
+2011-02-21  Hui Zhu  <teawater@gmail.com>
+
+       * tracepoint.c (tp_printf): New function.
+       (eval_agent_expr): Handle gdb_agent_op_printf.
+
 2011-02-18  Tom Tromey  <tromey@redhat.com>
 
        * Makefile.in (tracepoint-ipa.o): Depend on ax.def.

diff --git a/gdb/gdbserver/tracepoint.c b/gdb/gdbserver/tracepoint.c
index 8d99c94..d897728 100644 (file)
--- a/gdb/gdbserver/tracepoint.c
+++ b/gdb/gdbserver/tracepoint.c
@@ -4214,6 +4214,16 @@ gdb_agent_op_name (int op)
   return gdb_agent_op_names[op];
 }
 
+int
+tp_printf (const char *format, ...)
+{
+  va_list ap;
+  va_start (ap, format);
+  vprintf (format, ap);
+  va_end (ap);
+  return 0;
+}
+
 /* The agent expression evaluator, as specified by the GDB docs. It
    returns 0 if everything went OK, and a nonzero error code
    otherwise.  */
@@ -4573,6 +4583,40 @@ eval_agent_expr (struct tracepoint_hit_ctx *ctx,
          agent_tsv_read (tframe, arg);
          break;
 
+       case gdb_agent_op_printf:
+         {
+           void *argv;
+           arg = aexpr->bytes[pc++];
+           argv = (void *) (unsigned long) top;
+           if (--sp >= 0)
+             top = stack[sp];
+
+           if (arg)
+             {
+               if (strstr ((char *) (aexpr->bytes + pc), "%s"))
+                 {
+                   int                 i;
+                   unsigned char       buf[100];
+
+                   for (i = 0; i < 100; i++)
+                     {
+                       agent_mem_read (tframe, buf + i,
+                                       (CORE_ADDR) ((unsigned long)argv + i),
+                                       1);
+                       if (!buf[i])
+                         break;
+                     }
+                   tp_printf ((char *) (aexpr->bytes + pc), buf);
+                 }
+               else
+                 tp_printf ((char *) (aexpr->bytes + pc), argv);
+             }
+           else
+             tp_printf ((char *) (aexpr->bytes + pc));
+           pc += strlen ((char *) aexpr->bytes + pc) + 1;
+         }
+         break;
+
          /* GDB never (currently) generates any of these ops.  */
        case gdb_agent_op_float:
        case gdb_agent_op_ref_float: