Merge GDB 7.5.1

gdb/gdbserver/ax.h

+/* Data structures and functions associated with agent expressions in GDB.
+   Copyright (C) 2009-2012 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#if !defined (AX_H)
+#define AX_H 1
+
+#include "server.h"
+#include "regcache.h"
+
+#ifdef IN_PROCESS_AGENT
+extern int debug_agent;
+#define debug_threads debug_agent
+#endif
+
+struct traceframe;
+
+/* Enumeration of the different kinds of things that can happen during
+   agent expression evaluation.  */
+
+enum eval_result_type
+  {
+    expr_eval_no_error,
+    expr_eval_empty_expression,
+    expr_eval_empty_stack,
+    expr_eval_stack_overflow,
+    expr_eval_stack_underflow,
+    expr_eval_unhandled_opcode,
+    expr_eval_unrecognized_opcode,
+    expr_eval_divide_by_zero,
+    expr_eval_invalid_goto
+  };
+
+struct agent_expr
+{
+  int length;
+
+  unsigned char *bytes;
+};
+
+#ifndef IN_PROCESS_AGENT
+
+/* The packet form of an agent expression consists of an 'X', number
+   of bytes in expression, a comma, and then the bytes.  */
+struct agent_expr *gdb_parse_agent_expr (char **actparm);
+
+/* Convert the bytes of an agent expression back into hex digits, so
+   they can be printed or uploaded.  This allocates the buffer,
+   callers should free when they are done with it.  */
+char *gdb_unparse_agent_expr (struct agent_expr *aexpr);
+void emit_prologue (void);
+void emit_epilogue (void);
+enum eval_result_type compile_bytecodes (struct agent_expr *aexpr);
+#endif
+
+enum eval_result_type gdb_eval_agent_expr (struct regcache *regcache,
+                                           struct traceframe *tframe,
+                                           struct agent_expr *aexpr,
+                                           ULONGEST *rslt);
+#endif /* AX_H */