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146 lines
4.5 KiB
C
146 lines
4.5 KiB
C
/* Data structures and functions associated with agent expressions in GDB.
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Copyright (C) 2009-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (AX_H)
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#define AX_H 1
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#include "regcache.h"
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#ifdef IN_PROCESS_AGENT
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extern int debug_agent;
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#define debug_threads debug_agent
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#endif
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struct traceframe;
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/* Enumeration of the different kinds of things that can happen during
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agent expression evaluation. */
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enum eval_result_type
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{
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expr_eval_no_error,
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expr_eval_empty_expression,
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expr_eval_empty_stack,
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expr_eval_stack_overflow,
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expr_eval_stack_underflow,
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expr_eval_unhandled_opcode,
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expr_eval_unrecognized_opcode,
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expr_eval_divide_by_zero,
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expr_eval_invalid_goto
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};
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struct agent_expr
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{
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int length;
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unsigned char *bytes;
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};
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#ifndef IN_PROCESS_AGENT
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/* The packet form of an agent expression consists of an 'X', number
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of bytes in expression, a comma, and then the bytes. */
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struct agent_expr *gdb_parse_agent_expr (char **actparm);
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/* Release an agent expression. */
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void gdb_free_agent_expr (struct agent_expr *aexpr);
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/* Convert the bytes of an agent expression back into hex digits, so
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they can be printed or uploaded. This allocates the buffer,
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callers should free when they are done with it. */
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char *gdb_unparse_agent_expr (struct agent_expr *aexpr);
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void emit_prologue (void);
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void emit_epilogue (void);
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enum eval_result_type compile_bytecodes (struct agent_expr *aexpr);
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#endif
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/* The context when evaluating agent expression. */
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struct eval_agent_expr_context
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{
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/* The registers when evaluating agent expression. */
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struct regcache *regcache;
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/* The traceframe, if any, when evaluating agent expression. */
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struct traceframe *tframe;
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/* The tracepoint, if any, when evaluating agent expression. */
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struct tracepoint *tpoint;
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};
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enum eval_result_type
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gdb_eval_agent_expr (struct eval_agent_expr_context *ctx,
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struct agent_expr *aexpr,
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ULONGEST *rslt);
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/* Bytecode compilation function vector. */
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struct emit_ops
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{
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void (*emit_prologue) (void);
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void (*emit_epilogue) (void);
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void (*emit_add) (void);
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void (*emit_sub) (void);
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void (*emit_mul) (void);
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void (*emit_lsh) (void);
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void (*emit_rsh_signed) (void);
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void (*emit_rsh_unsigned) (void);
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void (*emit_ext) (int arg);
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void (*emit_log_not) (void);
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void (*emit_bit_and) (void);
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void (*emit_bit_or) (void);
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void (*emit_bit_xor) (void);
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void (*emit_bit_not) (void);
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void (*emit_equal) (void);
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void (*emit_less_signed) (void);
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void (*emit_less_unsigned) (void);
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void (*emit_ref) (int size);
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void (*emit_if_goto) (int *offset_p, int *size_p);
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void (*emit_goto) (int *offset_p, int *size_p);
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void (*write_goto_address) (CORE_ADDR from, CORE_ADDR to, int size);
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void (*emit_const) (LONGEST num);
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void (*emit_call) (CORE_ADDR fn);
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void (*emit_reg) (int reg);
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void (*emit_pop) (void);
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void (*emit_stack_flush) (void);
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void (*emit_zero_ext) (int arg);
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void (*emit_swap) (void);
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void (*emit_stack_adjust) (int n);
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/* Emit code for a generic function that takes one fixed integer
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argument and returns a 64-bit int (for instance, tsv getter). */
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void (*emit_int_call_1) (CORE_ADDR fn, int arg1);
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/* Emit code for a generic function that takes one fixed integer
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argument and a 64-bit int from the top of the stack, and returns
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nothing (for instance, tsv setter). */
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void (*emit_void_call_2) (CORE_ADDR fn, int arg1);
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/* Emit code specialized for common combinations of compare followed
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by a goto. */
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void (*emit_eq_goto) (int *offset_p, int *size_p);
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void (*emit_ne_goto) (int *offset_p, int *size_p);
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void (*emit_lt_goto) (int *offset_p, int *size_p);
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void (*emit_le_goto) (int *offset_p, int *size_p);
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void (*emit_gt_goto) (int *offset_p, int *size_p);
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void (*emit_ge_goto) (int *offset_p, int *size_p);
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};
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extern CORE_ADDR current_insn_ptr;
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extern int emit_error;
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#endif /* AX_H */
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