diff options
Diffstat (limited to 'gdb/ax-gdb.h')
| -rw-r--r-- | gdb/ax-gdb.h | 101 |
1 files changed, 53 insertions, 48 deletions
diff --git a/gdb/ax-gdb.h b/gdb/ax-gdb.h index feab1881b7b..3764b692e64 100644 --- a/gdb/ax-gdb.h +++ b/gdb/ax-gdb.h @@ -1,26 +1,27 @@ /* GDB-specific functions for operating on agent expressions Copyright 1998 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 2 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, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ #ifndef AX_GDB_H #define AX_GDB_H - + /* Types and enums */ /* GDB stores expressions in the form of a flattened tree (struct @@ -48,62 +49,66 @@ 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; + + 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)); +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)); + PARAMS ((struct expression * EXPR)); /* 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, +extern struct agent_expr *gen_trace_for_expr PARAMS ((CORE_ADDR, struct expression *)); #endif /* AX_GDB_H */ |