1 /* Data structures and functions associated with agent expressions in GDB.
2 Copyright (C) 2009-2017 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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/>. */
24 #ifdef IN_PROCESS_AGENT
25 extern int debug_agent
;
26 #define debug_threads debug_agent
31 /* Enumeration of the different kinds of things that can happen during
32 agent expression evaluation. */
37 expr_eval_empty_expression
,
38 expr_eval_empty_stack
,
39 expr_eval_stack_overflow
,
40 expr_eval_stack_underflow
,
41 expr_eval_unhandled_opcode
,
42 expr_eval_unrecognized_opcode
,
43 expr_eval_divide_by_zero
,
44 expr_eval_invalid_goto
54 #ifndef IN_PROCESS_AGENT
56 /* The packet form of an agent expression consists of an 'X', number
57 of bytes in expression, a comma, and then the bytes. */
58 struct agent_expr
*gdb_parse_agent_expr (const char **actparm
);
60 /* Release an agent expression. */
61 void gdb_free_agent_expr (struct agent_expr
*aexpr
);
63 /* Convert the bytes of an agent expression back into hex digits, so
64 they can be printed or uploaded. This allocates the buffer,
65 callers should free when they are done with it. */
66 char *gdb_unparse_agent_expr (struct agent_expr
*aexpr
);
67 void emit_prologue (void);
68 void emit_epilogue (void);
69 enum eval_result_type
compile_bytecodes (struct agent_expr
*aexpr
);
72 /* The context when evaluating agent expression. */
74 struct eval_agent_expr_context
76 /* The registers when evaluating agent expression. */
77 struct regcache
*regcache
;
78 /* The traceframe, if any, when evaluating agent expression. */
79 struct traceframe
*tframe
;
80 /* The tracepoint, if any, when evaluating agent expression. */
81 struct tracepoint
*tpoint
;
85 gdb_eval_agent_expr (struct eval_agent_expr_context
*ctx
,
86 struct agent_expr
*aexpr
,
89 /* Bytecode compilation function vector. */
93 void (*emit_prologue
) (void);
94 void (*emit_epilogue
) (void);
95 void (*emit_add
) (void);
96 void (*emit_sub
) (void);
97 void (*emit_mul
) (void);
98 void (*emit_lsh
) (void);
99 void (*emit_rsh_signed
) (void);
100 void (*emit_rsh_unsigned
) (void);
101 void (*emit_ext
) (int arg
);
102 void (*emit_log_not
) (void);
103 void (*emit_bit_and
) (void);
104 void (*emit_bit_or
) (void);
105 void (*emit_bit_xor
) (void);
106 void (*emit_bit_not
) (void);
107 void (*emit_equal
) (void);
108 void (*emit_less_signed
) (void);
109 void (*emit_less_unsigned
) (void);
110 void (*emit_ref
) (int size
);
111 void (*emit_if_goto
) (int *offset_p
, int *size_p
);
112 void (*emit_goto
) (int *offset_p
, int *size_p
);
113 void (*write_goto_address
) (CORE_ADDR from
, CORE_ADDR to
, int size
);
114 void (*emit_const
) (LONGEST num
);
115 void (*emit_call
) (CORE_ADDR fn
);
116 void (*emit_reg
) (int reg
);
117 void (*emit_pop
) (void);
118 void (*emit_stack_flush
) (void);
119 void (*emit_zero_ext
) (int arg
);
120 void (*emit_swap
) (void);
121 void (*emit_stack_adjust
) (int n
);
123 /* Emit code for a generic function that takes one fixed integer
124 argument and returns a 64-bit int (for instance, tsv getter). */
125 void (*emit_int_call_1
) (CORE_ADDR fn
, int arg1
);
127 /* Emit code for a generic function that takes one fixed integer
128 argument and a 64-bit int from the top of the stack, and returns
129 nothing (for instance, tsv setter). */
130 void (*emit_void_call_2
) (CORE_ADDR fn
, int arg1
);
132 /* Emit code specialized for common combinations of compare followed
134 void (*emit_eq_goto
) (int *offset_p
, int *size_p
);
135 void (*emit_ne_goto
) (int *offset_p
, int *size_p
);
136 void (*emit_lt_goto
) (int *offset_p
, int *size_p
);
137 void (*emit_le_goto
) (int *offset_p
, int *size_p
);
138 void (*emit_gt_goto
) (int *offset_p
, int *size_p
);
139 void (*emit_ge_goto
) (int *offset_p
, int *size_p
);
142 extern CORE_ADDR current_insn_ptr
;
143 extern int emit_error
;