X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fax-gdb.h;h=8b5ab46c665866e7d543aaa56e62c6314ce2f86b;hb=a7785f8c797183eb363e95c201343df67d8536c6;hp=feab1881b7b22d717fe4a61ff66a19bc0b677b87;hpb=5b64ad42d36e6d487e1f7287d37fbc243a178e72;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/ax-gdb.h b/gdb/ax-gdb.h index feab1881b7..8b5ab46c66 100644 --- a/gdb/ax-gdb.h +++ b/gdb/ax-gdb.h @@ -1,26 +1,29 @@ /* GDB-specific functions for operating on agent expressions - Copyright 1998 Free Software Foundation, Inc. + Copyright (C) 1998-2017 Free Software Foundation, Inc. -This file is part of GDB. + 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 2 of the License, or -(at your option) any later version. + 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. + 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, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ #ifndef AX_GDB_H #define AX_GDB_H - +#include "ax.h" /* For agent_expr_up. */ + +struct expression; +union exp_element; + /* Types and enums */ /* GDB stores expressions in the form of a flattened tree (struct @@ -48,62 +51,79 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Different kinds of agent expression static values. */ -enum axs_lvalue_kind { - /* We generated code to compute the subexpression's value. - Constants and arithmetic operators yield this. */ - axs_rvalue, - - /* We generated code to yield the subexpression's value's address on - the top of the stack. If the caller needs an rvalue, it should - call require_rvalue to produce the rvalue from this address. */ - axs_lvalue_memory, - - /* We didn't generate any code, and the stack is undisturbed, - because the subexpression's value lives in a register; u.reg is - the register number. If the caller needs an rvalue, it should - call require_rvalue to produce the rvalue from this register - number. */ - axs_lvalue_register -}; +enum axs_lvalue_kind + { + /* We generated code to compute the subexpression's value. + Constants and arithmetic operators yield this. */ + axs_rvalue, + + /* We generated code to yield the subexpression's value's address on + the top of the stack. If the caller needs an rvalue, it should + call require_rvalue to produce the rvalue from this address. */ + axs_lvalue_memory, + + /* We didn't generate any code, and the stack is undisturbed, + because the subexpression's value lives in a register; u.reg is + the register number. If the caller needs an rvalue, it should + call require_rvalue to produce the rvalue from this register + number. */ + axs_lvalue_register + }; /* Structure describing what we got from a subexpression. Think of this as parallel to value.h's enum lval_type, except that we're describing a value which will exist when the expression is evaluated in the future, not a value we have in our hand. */ -struct axs_value { - enum axs_lvalue_kind kind; /* see above */ - - /* The type of the subexpression. Even if lvalue == axs_lvalue_memory, - this is the type of the value itself; the value on the stack is a - "pointer to" an object of this type. */ - struct type *type; - - union { - /* if kind == axs_lvalue_register, this is the register number */ - int reg; - } u; -}; - +struct axs_value + { + enum axs_lvalue_kind kind; /* see above */ + + /* The type of the subexpression. Even if lvalue == axs_lvalue_memory, + this is the type of the value itself; the value on the stack is a + "pointer to" an object of this type. */ + struct type *type; + + /* If nonzero, this is a variable which does not actually exist in + the program. */ + char optimized_out; + + union + { + /* if kind == axs_lvalue_register, this is the register number */ + int reg; + } + u; + }; -/* Translating GDB expressions into agent expressions. */ - -/* Given a GDB expression EXPR, translate it into the agent bytecode, - and return it. FLAGS are from enum expr_to_agent_flags. */ -extern struct agent_expr *expr_to_agent PARAMS ((struct expression *EXPR, - struct axs_value *VALUE)); -/* Given a GDB expression EXPR denoting an lvalue in memory, produce a - string of agent bytecode which will leave its address and size on - the top of stack. Return the agent expression. */ -extern struct agent_expr *expr_to_address_and_size - PARAMS ((struct expression *EXPR)); +/* Translating GDB expressions into agent expressions. */ /* Given a GDB expression EXPR, return bytecode to trace its value. The result will use the `trace' and `trace_quick' bytecodes to record the value of all memory touched by the expression, and leave no values on the stack. The caller can then use the ax_reqs function to discover which registers the expression uses. */ -extern struct agent_expr *gen_trace_for_expr PARAMS ((CORE_ADDR, - struct expression *)); +extern agent_expr_up gen_trace_for_expr (CORE_ADDR, struct expression *, + int); + +extern agent_expr_up gen_trace_for_var (CORE_ADDR, struct gdbarch *, + struct symbol *, int); + +extern agent_expr_up gen_trace_for_return_address (CORE_ADDR, + struct gdbarch *, + int); + +extern agent_expr_up gen_eval_for_expr (CORE_ADDR, struct expression *); + +extern void gen_expr (struct expression *exp, union exp_element **pc, + struct agent_expr *ax, struct axs_value *value); + +extern void require_rvalue (struct agent_expr *ax, struct axs_value *value); + +struct format_piece; +extern agent_expr_up gen_printf (CORE_ADDR, struct gdbarch *, + CORE_ADDR, LONGEST, const char *, int, + struct format_piece *, + int, struct expression **); #endif /* AX_GDB_H */