/* Definitions for values of C expressions, for GDB.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1992 Free Software Foundation, Inc.
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
+This file is part of GDB.
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
+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.
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+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.
-enum lval_type { not_lval, lval_memory, lval_register, lval_internalvar,
- lval_internalvar_component };
+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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#if !defined (VALUE_H)
+#define VALUE_H 1
+
+/*
+ * The structure which defines the type of a value. It should never
+ * be possible for a program lval value to survive over a call to the inferior
+ * (ie to be put into the history list or an internal variable).
+ */
+enum lval_type {
+ /* Not an lval. */
+ not_lval,
+ /* In memory. Could be a saved register. */
+ lval_memory,
+ /* In a register. */
+ lval_register,
+ /* In a gdb internal variable. */
+ lval_internalvar,
+ /* Part of a gdb internal variable (structure field). */
+ lval_internalvar_component,
+ /* In a register series in a frame not the current one, which may have been
+ partially saved or saved in different places (otherwise would be
+ lval_register or lval_memory). */
+ lval_reg_frame_relative
+};
struct value
{
+ /* Type of value; either not an lval, or one of the various
+ different possible kinds of lval. */
enum lval_type lval;
+ /* Location of value (if lval). */
union
{
+ /* Address in inferior or byte of registers structure. */
CORE_ADDR address;
+ /* Pointer to internal variable. */
struct internalvar *internalvar;
+ /* Number of register. Only used with
+ lval_reg_frame_relative. */
+ int regnum;
} location;
- int offset;
+ /* Describes offset of a value within lval a structure in bytes. */
+ int offset;
+ /* Only used for bitfields; number of bits contained in them. */
int bitsize;
+ /* Only used for bitfields; position of start of field.
+ For BITS_BIG_ENDIAN=0 targets, it is the position of the LSB.
+ For BITS_BIG_ENDIAN=1 targets, it is the position of the MSB. */
int bitpos;
+ /* Frame value is relative to. In practice, this address is only
+ used if the value is stored in several registers in other than
+ the current frame, and these registers have not all been saved
+ at the same place in memory. This will be described in the
+ lval enum above as "lval_reg_frame_relative". */
+ CORE_ADDR frame_addr;
+ /* Type of the value. */
struct type *type;
+ /* Values are stored in a chain, so that they can be deleted
+ easily over calls to the inferior. Values assigned to internal
+ variables or put into the value history are taken off this
+ list. */
struct value *next;
+ /* If an lval is forced to repeat, a new value is created with
+ these fields set. The new value is not an lval. */
short repeated;
short repetitions;
+ /* Register number if the value is from a register. Is not kept
+ if you take a field of a structure that is stored in a
+ register. Shouldn't it be? */
short regno;
- long contents[1];
+ /* If zero, contents of this value are in the contents field.
+ If nonzero, contents are in inferior memory at address
+ in the location.address field plus the offset field
+ (and the lval field should be lval_memory). */
+ char lazy;
+ /* If nonzero, this is the value of a variable which does not
+ actually exist in the program. */
+ char optimized_out;
+ /* Actual contents of the value. For use of this value; setting
+ it uses the stuff above. Not valid if lazy is nonzero.
+ Target byte-order. We force it to be aligned properly for any
+ possible value. */
+ union {
+ long contents[1];
+ double force_double_align;
+#ifdef LONG_LONG
+ long long force_longlong_align;
+#endif
+ } aligner;
+
};
typedef struct value *value;
#define VALUE_TYPE(val) (val)->type
-#define VALUE_CONTENTS(val) ((char *) (val)->contents)
+#define VALUE_LAZY(val) (val)->lazy
+/* VALUE_CONTENTS and VALUE_CONTENTS_RAW both return the address of
+ the gdb buffer used to hold a copy of the contents of the lval.
+ VALUE_CONTENTS is used when the contents of the buffer are needed --
+ it uses value_fetch_lazy() to load the buffer from the process being
+ debugged if it hasn't already been loaded. VALUE_CONTENTS_RAW is
+ used when data is being stored into the buffer, or when it is
+ certain that the contents of the buffer are valid. */
+#define VALUE_CONTENTS_RAW(val) ((char *) (val)->aligner.contents)
+#define VALUE_CONTENTS(val) ((void)(VALUE_LAZY(val) && value_fetch_lazy(val)),\
+ VALUE_CONTENTS_RAW(val))
+extern int
+value_fetch_lazy PARAMS ((value val));
+
#define VALUE_LVAL(val) (val)->lval
#define VALUE_ADDRESS(val) (val)->location.address
#define VALUE_INTERNALVAR(val) (val)->location.internalvar
+#define VALUE_FRAME_REGNUM(val) ((val)->location.regnum)
+#define VALUE_FRAME(val) ((val)->frame_addr)
#define VALUE_OFFSET(val) (val)->offset
#define VALUE_BITSIZE(val) (val)->bitsize
#define VALUE_BITPOS(val) (val)->bitpos
#define VALUE_REPEATED(val) (val)->repeated
#define VALUE_REPETITIONS(val) (val)->repetitions
#define VALUE_REGNO(val) (val)->regno
+#define VALUE_OPTIMIZED_OUT(val) ((val)->optimized_out)
+
+/* Convert a REF to the object referenced. */
+
+#define COERCE_REF(arg) \
+{ if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_REF) \
+ arg = value_at_lazy (TYPE_TARGET_TYPE (VALUE_TYPE (arg)), \
+ unpack_long (VALUE_TYPE (arg), \
+ VALUE_CONTENTS (arg)));}
/* If ARG is an array, convert it to a pointer.
- If ARG is an enum, convert it to an integer. */
+ If ARG is an enum, convert it to an integer.
+ If ARG is a function, convert it to a function pointer.
+
+ References are dereferenced. */
#define COERCE_ARRAY(arg) \
-{ if (VALUE_REPEATED (arg) \
+{ COERCE_REF(arg); \
+ if (VALUE_REPEATED (arg) \
|| TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_ARRAY) \
arg = value_coerce_array (arg); \
+ if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_FUNC) \
+ arg = value_coerce_function (arg); \
if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_ENUM) \
arg = value_cast (builtin_type_unsigned_int, arg); \
}
/* If ARG is an enum, convert it to an integer. */
#define COERCE_ENUM(arg) \
-{ if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_ENUM) \
+{ if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_REF) \
+ arg = value_ind (arg); \
+ if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_ENUM) \
arg = value_cast (builtin_type_unsigned_int, arg); \
}
char *name;
value value;
};
+
+/* Pointer to member function. Depends on compiler implementation. */
+
+#define METHOD_PTR_IS_VIRTUAL(ADDR) ((ADDR) & 0x80000000)
+#define METHOD_PTR_FROM_VOFFSET(OFFSET) (0x80000000 + (OFFSET))
+#define METHOD_PTR_TO_VOFFSET(ADDR) (~0x80000000 & (ADDR))
+
\f
-long value_as_long ();
-double value_as_double ();
-long unpack_long ();
-double unpack_double ();
-long unpack_field_as_long ();
-value value_from_long ();
-value value_from_double ();
-value value_at ();
-value value_of_variable ();
-value value_of_register ();
-value read_var_value ();
-value locate_var_value ();
-value allocate_value ();
-value allocate_repeat_value ();
-value value_string ();
-
-value value_binop ();
-value value_add ();
-value value_sub ();
-value value_coerce_array ();
-value value_ind ();
-value value_addr ();
-value value_assign ();
-value value_neg ();
-value value_lognot ();
-value value_struct_elt ();
-value value_field ();
-value value_cast ();
-value value_repeat ();
-value value_subscript ();
-
-value call_function ();
-value value_being_returned ();
-
-value evaluate_expression ();
-value evaluate_type ();
-value parse_and_eval ();
-value parse_to_comma_and_eval ();
-
-value access_value_history ();
-value value_of_internalvar ();
-struct internalvar *lookup_internalvar ();
-
-int value_equal ();
-int value_less ();
-int value_zerop ();
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "expression.h"
+
+#ifdef __STDC__
+struct frame_info;
+struct fn_field;
+#endif
+
+extern void
+print_address_demangle PARAMS ((CORE_ADDR, FILE *, int));
+
+extern LONGEST
+value_as_long PARAMS ((value val));
+
+extern double
+value_as_double PARAMS ((value val));
+
+extern CORE_ADDR
+value_as_pointer PARAMS ((value val));
+
+extern LONGEST
+unpack_long PARAMS ((struct type *type, char *valaddr));
+
+extern double
+unpack_double PARAMS ((struct type *type, char *valaddr, int *invp));
+
+extern CORE_ADDR
+unpack_pointer PARAMS ((struct type *type, char *valaddr));
+
+extern LONGEST
+unpack_field_as_long PARAMS ((struct type *type, char *valaddr,
+ int fieldno));
+
+extern value
+value_from_longest PARAMS ((struct type *type, LONGEST num));
+
+extern value
+value_from_double PARAMS ((struct type *type, double num));
+
+extern value
+value_at PARAMS ((struct type *type, CORE_ADDR addr));
+
+extern value
+value_at_lazy PARAMS ((struct type *type, CORE_ADDR addr));
+
+/* FIXME: Assumes equivalence of "struct frame_info *" and "FRAME" */
+extern value
+value_from_register PARAMS ((struct type *type, int regnum,
+ struct frame_info * frame));
+
+extern value
+value_of_variable PARAMS ((struct symbol *var));
+
+extern value
+value_of_register PARAMS ((int regnum));
+
+/* FIXME: Assumes equivalence of "struct frame_info *" and "FRAME" */
+extern value
+read_var_value PARAMS ((struct symbol *var, struct frame_info *frame));
+
+/* FIXME: Assumes equivalence of "struct frame_info *" and "FRAME" */
+extern value
+locate_var_value PARAMS ((struct symbol *var, struct frame_info *frame));
+
+extern value
+allocate_value PARAMS ((struct type *type));
+
+extern value
+allocate_repeat_value PARAMS ((struct type *type, int count));
+
+extern value
+value_mark PARAMS ((void));
+
+extern void
+value_free_to_mark PARAMS ((value mark));
+
+extern value
+value_string PARAMS ((char *ptr, int len));
+
+extern value
+value_binop PARAMS ((value arg1, value arg2, enum exp_opcode op));
+
+extern value
+value_add PARAMS ((value arg1, value arg2));
+
+extern value
+value_sub PARAMS ((value arg1, value arg2));
+
+extern value
+value_coerce_array PARAMS ((value arg1));
+
+extern value
+value_coerce_function PARAMS ((value arg1));
+
+extern value
+value_ind PARAMS ((value arg1));
+
+extern value
+value_addr PARAMS ((value arg1));
+
+extern value
+value_assign PARAMS ((value toval, value fromval));
+
+extern value
+value_neg PARAMS ((value arg1));
+
+extern value
+value_complement PARAMS ((value arg1));
+
+extern value
+value_struct_elt PARAMS ((value *argp, value *args, char *name,
+ int *static_memfuncp, char *err));
+
+extern value
+value_struct_elt_for_reference PARAMS ((struct type *domain,
+ int offset,
+ struct type *curtype,
+ char *name,
+ struct type *intype));
+
+extern value
+value_field PARAMS ((value arg1, int fieldno));
+
+extern value
+value_primitive_field PARAMS ((value arg1, int offset, int fieldno,
+ struct type *arg_type));
+
+extern value
+value_cast PARAMS ((struct type *type, value arg2));
+
+extern value
+value_zero PARAMS ((struct type *type, enum lval_type lv));
+
+extern value
+value_repeat PARAMS ((value arg1, int count));
+
+extern value
+value_subscript PARAMS ((value array, value idx));
+
+extern value
+value_from_vtable_info PARAMS ((value arg, struct type *type));
+
+extern value
+value_being_returned PARAMS ((struct type *valtype,
+ char retbuf[REGISTER_BYTES],
+ int struct_return));
+
+extern int
+using_struct_return PARAMS ((value function, CORE_ADDR funcaddr,
+ struct type *value_type, int gcc_p));
+
+extern void
+set_return_value PARAMS ((value val));
+
+extern value
+evaluate_expression PARAMS ((struct expression *exp));
+
+extern value
+evaluate_type PARAMS ((struct expression *exp));
+
+extern value
+parse_and_eval PARAMS ((char *exp));
+
+extern value
+parse_to_comma_and_eval PARAMS ((char **expp));
+
+extern struct type *
+parse_and_eval_type PARAMS ((char *p, int length));
+
+extern CORE_ADDR
+parse_and_eval_address PARAMS ((char *exp));
+
+extern CORE_ADDR
+parse_and_eval_address_1 PARAMS ((char **expptr));
+
+extern value
+access_value_history PARAMS ((int num));
+
+extern value
+value_of_internalvar PARAMS ((struct internalvar *var));
+
+extern void
+set_internalvar PARAMS ((struct internalvar *var, value val));
+
+extern void
+set_internalvar_component PARAMS ((struct internalvar *var, int offset,
+ int bitpos, int bitsize,
+ value newvalue));
+
+extern struct internalvar *
+lookup_internalvar PARAMS ((char *name));
+
+extern int
+value_equal PARAMS ((value arg1, value arg2));
+
+extern int
+value_less PARAMS ((value arg1, value arg2));
+
+extern int
+value_logical_not PARAMS ((value arg1));
+
+/* C++ */
+
+extern value
+value_of_this PARAMS ((int complain));
+
+extern value
+value_x_binop PARAMS ((value arg1, value arg2, enum exp_opcode op,
+ enum exp_opcode otherop));
+
+extern value
+value_x_unop PARAMS ((value arg1, enum exp_opcode op));
+
+extern value
+value_fn_field PARAMS ((value *arg1p, struct fn_field *f, int j,
+ struct type* type, int offset));
+
+extern value
+value_virtual_fn_field PARAMS ((value *arg1p, struct fn_field *f, int j,
+ struct type *type, int offset));
+
+extern int
+binop_user_defined_p PARAMS ((enum exp_opcode op, value arg1, value arg2));
+
+extern int
+unop_user_defined_p PARAMS ((enum exp_opcode op, value arg1));
+
+extern int
+typecmp PARAMS ((int staticp, struct type *t1[], value t2[]));
+
+extern int
+destructor_name_p PARAMS ((const char *name, const struct type *type));
+
+#define value_free(val) free ((PTR)val)
+
+extern void
+free_all_values PARAMS ((void));
+
+extern void
+release_value PARAMS ((value val));
+
+extern int
+record_latest_value PARAMS ((value val));
+
+extern void
+registers_changed PARAMS ((void));
+
+extern void
+read_register_bytes PARAMS ((int regbyte, char *myaddr, int len));
+
+extern void
+write_register_bytes PARAMS ((int regbyte, char *myaddr, int len));
+
+extern void
+read_register_gen PARAMS ((int regno, char *myaddr));
+
+extern CORE_ADDR
+read_register PARAMS ((int regno));
+
+extern void
+write_register PARAMS ((int regno, int val));
+
+extern void
+supply_register PARAMS ((int regno, char *val));
+
+/* FIXME: Assumes equivalence of "struct frame_info *" and "FRAME" */
+extern void
+get_saved_register PARAMS ((char *raw_buffer, int *optimized,
+ CORE_ADDR *addrp, struct frame_info *frame,
+ int regnum, enum lval_type *lval));
+
+extern void
+modify_field PARAMS ((char *addr, int fieldval, int bitpos, int bitsize));
+
+extern void
+type_print PARAMS ((struct type *type, char *varstring, FILE *stream,
+ int show));
+
+extern char *
+baseclass_addr PARAMS ((struct type *type, int index, char *valaddr,
+ value *valuep, int *errp));
+
+extern void
+print_floating PARAMS ((char *valaddr, struct type *type, FILE *stream));
+
+extern int
+value_print PARAMS ((value val, FILE *stream, int format,
+ enum val_prettyprint pretty));
+
+extern int
+val_print PARAMS ((struct type *type, char *valaddr, CORE_ADDR address,
+ FILE *stream, int format, int deref_ref,
+ int recurse, enum val_prettyprint pretty));
+
+extern int
+val_print_string PARAMS ((CORE_ADDR addr, FILE *stream));
+
+/* FIXME: Assumes equivalence of "struct frame_info *" and "FRAME" */
+extern void
+print_variable_value PARAMS ((struct symbol *var, struct frame_info *frame,
+ FILE *stream));
+
+extern value
+value_arg_coerce PARAMS ((value));
+
+extern int
+check_field PARAMS ((value, const char *));
+
+extern void
+c_typedef_print PARAMS ((struct type *type, struct symbol *new, FILE *stream));
+
+extern char *
+internalvar_name PARAMS ((struct internalvar *var));
+
+extern void
+clear_value_history PARAMS ((void));
+
+extern void
+clear_internalvars PARAMS ((void));
+
+/* From values.c */
+
+extern value
+value_copy PARAMS ((value));
+
+extern int
+baseclass_offset PARAMS ((struct type *, int, value, int));
+
+/* From valops.c */
+
+extern value
+call_function_by_hand PARAMS ((value, int, value *));
+
+#endif /* !defined (VALUE_H) */
projects / binutils.git / blobdiff