/* GDB-specific functions for operating on agent expressions.
- Copyright (C) 1998, 1999, 2000, 2001, 2003, 2007
+ Copyright (C) 1998, 1999, 2000, 2001, 2003, 2007, 2008
Free Software Foundation, Inc.
This file is part of GDB.
/* We don't have to worry about the size of the value, because
all our integral values are fully sign-extended, and when
casting pointers we can do anything we like. Is there any
- way for us to actually know what GCC actually does with a
- cast like this? */
- value->type = type;
+ way for us to know what GCC actually does with a cast like
+ this? */
break;
case TYPE_CODE_INT:
/* Generating bytecode from GDB expressions: driver */
-/* Given a GDB expression EXPR, produce a string of agent bytecode
- which computes its value. Return the agent expression, and set
- *VALUE to describe its type, and whether it's an lvalue or rvalue. */
-struct agent_expr *
-expr_to_agent (struct expression *expr, struct axs_value *value)
-{
- struct cleanup *old_chain = 0;
- struct agent_expr *ax = new_agent_expr (0);
- union exp_element *pc;
-
- old_chain = make_cleanup_free_agent_expr (ax);
-
- pc = expr->elts;
- trace_kludge = 0;
- gen_expr (&pc, ax, value);
-
- /* We have successfully built the agent expr, so cancel the cleanup
- request. If we add more cleanups that we always want done, this
- will have to get more complicated. */
- discard_cleanups (old_chain);
- return ax;
-}
-
-
-#if 0 /* not used */
-/* 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.
-
- Not sure this function is useful at all. */
-struct agent_expr *
-expr_to_address_and_size (struct expression *expr)
-{
- struct axs_value value;
- struct agent_expr *ax = expr_to_agent (expr, &value);
-
- /* Complain if the result is not a memory lvalue. */
- if (value.kind != axs_lvalue_memory)
- {
- free_agent_expr (ax);
- error (_("Expression does not denote an object in memory."));
- }
-
- /* Push the object's size on the stack. */
- ax_const_l (ax, TYPE_LENGTH (value.type));
-
- return ax;
-}
-#endif
-
/* 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. The