gdb/gdbserver/ax.h

   1 /* Data structures and functions associated with agent expressions in GDB.
   2    Copyright (C) 2009-2012 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #if !defined (AX_H)
  20 #define AX_H 1
  21
  22 #include "server.h"
  23 #include "regcache.h"
  24
  25 #ifdef IN_PROCESS_AGENT
  26 extern int debug_agent;
  27 #define debug_threads debug_agent
  28 #endif
  29
  30 struct traceframe;
  31
  32 /* Enumeration of the different kinds of things that can happen during
  33    agent expression evaluation.  */
  34
  35 enum eval_result_type
  36   {
  37     expr_eval_no_error,
  38     expr_eval_empty_expression,
  39     expr_eval_empty_stack,
  40     expr_eval_stack_overflow,
  41     expr_eval_stack_underflow,
  42     expr_eval_unhandled_opcode,
  43     expr_eval_unrecognized_opcode,
  44     expr_eval_divide_by_zero,
  45     expr_eval_invalid_goto
  46   };
  47
  48 struct agent_expr
  49 {
  50   int length;
  51
  52   unsigned char *bytes;
  53 };
  54
  55 #ifndef IN_PROCESS_AGENT
  56
  57 /* The packet form of an agent expression consists of an 'X', number
  58    of bytes in expression, a comma, and then the bytes.  */
  59 struct agent_expr *gdb_parse_agent_expr (char **actparm);
  60
  61 /* Convert the bytes of an agent expression back into hex digits, so
  62    they can be printed or uploaded.  This allocates the buffer,
  63    callers should free when they are done with it.  */
  64 char *gdb_unparse_agent_expr (struct agent_expr *aexpr);
  65 void emit_prologue (void);
  66 void emit_epilogue (void);
  67 enum eval_result_type compile_bytecodes (struct agent_expr *aexpr);
  68 #endif
  69
  70 enum eval_result_type gdb_eval_agent_expr (struct regcache *regcache,
  71                                            struct traceframe *tframe,
  72                                            struct agent_expr *aexpr,
  73                                            ULONGEST *rslt);
  74 #endif /* AX_H */