Update Copyright year range in all files maintained by GDB.
[deliverable/binutils-gdb.git] / gdb / gdbserver / ax.h
1 /* Data structures and functions associated with agent expressions in GDB.
2 Copyright (C) 2009-2014 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 /* The context when evaluating agent expression. */
71
72 struct eval_agent_expr_context
73 {
74 /* The registers when evaluating agent expression. */
75 struct regcache *regcache;
76 /* The traceframe, if any, when evaluating agent expression. */
77 struct traceframe *tframe;
78 /* The tracepoint, if any, when evaluating agent expression. */
79 struct tracepoint *tpoint;
80 };
81
82 enum eval_result_type
83 gdb_eval_agent_expr (struct eval_agent_expr_context *ctx,
84 struct agent_expr *aexpr,
85 ULONGEST *rslt);
86
87 /* Bytecode compilation function vector. */
88
89 struct emit_ops
90 {
91 void (*emit_prologue) (void);
92 void (*emit_epilogue) (void);
93 void (*emit_add) (void);
94 void (*emit_sub) (void);
95 void (*emit_mul) (void);
96 void (*emit_lsh) (void);
97 void (*emit_rsh_signed) (void);
98 void (*emit_rsh_unsigned) (void);
99 void (*emit_ext) (int arg);
100 void (*emit_log_not) (void);
101 void (*emit_bit_and) (void);
102 void (*emit_bit_or) (void);
103 void (*emit_bit_xor) (void);
104 void (*emit_bit_not) (void);
105 void (*emit_equal) (void);
106 void (*emit_less_signed) (void);
107 void (*emit_less_unsigned) (void);
108 void (*emit_ref) (int size);
109 void (*emit_if_goto) (int *offset_p, int *size_p);
110 void (*emit_goto) (int *offset_p, int *size_p);
111 void (*write_goto_address) (CORE_ADDR from, CORE_ADDR to, int size);
112 void (*emit_const) (LONGEST num);
113 void (*emit_call) (CORE_ADDR fn);
114 void (*emit_reg) (int reg);
115 void (*emit_pop) (void);
116 void (*emit_stack_flush) (void);
117 void (*emit_zero_ext) (int arg);
118 void (*emit_swap) (void);
119 void (*emit_stack_adjust) (int n);
120
121 /* Emit code for a generic function that takes one fixed integer
122 argument and returns a 64-bit int (for instance, tsv getter). */
123 void (*emit_int_call_1) (CORE_ADDR fn, int arg1);
124
125 /* Emit code for a generic function that takes one fixed integer
126 argument and a 64-bit int from the top of the stack, and returns
127 nothing (for instance, tsv setter). */
128 void (*emit_void_call_2) (CORE_ADDR fn, int arg1);
129
130 /* Emit code specialized for common combinations of compare followed
131 by a goto. */
132 void (*emit_eq_goto) (int *offset_p, int *size_p);
133 void (*emit_ne_goto) (int *offset_p, int *size_p);
134 void (*emit_lt_goto) (int *offset_p, int *size_p);
135 void (*emit_le_goto) (int *offset_p, int *size_p);
136 void (*emit_gt_goto) (int *offset_p, int *size_p);
137 void (*emit_ge_goto) (int *offset_p, int *size_p);
138 };
139
140 extern CORE_ADDR current_insn_ptr;
141 extern int emit_error;
142
143 #endif /* AX_H */
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