/* Definitions for values of C expressions, for GDB.
Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
- 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
+ 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Free Software Foundation, Inc.
This file is part of GDB.
/* Pointer to internal variable. */
struct internalvar *internalvar;
-
- /* Number of register. Only used with lval_reg_frame_relative. */
- int regnum;
} location;
/* Describes offset of a value within lval of a structure in bytes.
- If lval == lval_memory, this is an offset to the address.
- If lval == lval_register, this is a further offset from
- location.address within the registers structure.
- Note also the member embedded_offset below. */
+ If lval == lval_memory, this is an offset to the address. If
+ lval == lval_register, this is a further offset from
+ location.address within the registers structure. Note also the
+ member embedded_offset below. */
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;
+ /* 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 ID 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". */
+ /* Frame register value is relative to. This will be described in
+ the lval enum above as "lval_register". */
struct frame_id frame_id;
/* Type of the value. */
object, for several reasons:
- When printing the value, the user would probably rather see the
- full object, not just the limited portion apparent from the
- compile-time type.
+ full object, not just the limited portion apparent from the
+ compile-time type.
- If `type' has virtual base classes, then even printing `type'
- alone may require reaching outside the `type' portion of the
- object to wherever the virtual base class has been stored.
+ alone may require reaching outside the `type' portion of the
+ object to wherever the virtual base class has been stored.
When we store the entire object, `enclosing_type' is the run-time
type -- the complete object -- and `embedded_offset' is the
offset of `type' within that larger type, in bytes. The
- VALUE_CONTENTS macro takes `embedded_offset' into account, so
+ value_contents() macro takes `embedded_offset' into account, so
most GDB code continues to see the `type' portion of the value,
just as the inferior would.
If `type' is a pointer to an object, then `enclosing_type' is a
pointer to the object's run-time type, and `pointed_to_offset' is
the offset in bytes from the full object to the pointed-to object
- -- that is, the value `embedded_offset' would have if we
- followed the pointer and fetched the complete object. (I don't
- really see the point. Why not just determine the run-time type
- when you indirect, and avoid the special case? The contents
- don't matter until you indirect anyway.)
+ -- that is, the value `embedded_offset' would have if we followed
+ the pointer and fetched the complete object. (I don't really see
+ the point. Why not just determine the run-time type when you
+ indirect, and avoid the special case? The contents don't matter
+ until you indirect anyway.)
If we're not doing anything fancy, `enclosing_type' is equal to
`type', and `embedded_offset' is zero, so everything works
normally. */
- struct type *enclosing_type;
- int embedded_offset;
- int pointed_to_offset;
-
- /* 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;
-
- /* Register number if the value is from a register. */
- short regno;
-
- /* 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).
-
- WARNING: This field is used by the code which handles
- watchpoints (see breakpoint.c) to decide whether a particular
- value can be watched by hardware watchpoints. If the lazy flag
- is set for some member of a value chain, it is assumed that
- this member of the chain doesn't need to be watched as part of
- watching the value itself. This is how GDB avoids watching the
- entire struct or array when the user wants to watch a single
- struct member or array element. If you ever change the way
- lazy flag is set and reset, be sure to consider this use as
- well! */
- char lazy;
-
- /* If nonzero, this is the value of a variable which does not
- actually exist in the program. */
- char optimized_out;
-
- /* The BFD section associated with this value. */
- asection *bfd_section;
-
- /* 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. Note that a value therefore extends beyond
- what is declared here. */
- union
- {
- long contents[1];
- DOUBLEST force_doublest_align;
- LONGEST force_longest_align;
- CORE_ADDR force_core_addr_align;
- void *force_pointer_align;
- } aligner;
- /* Do not add any new members here -- contents above will trash them. */
+ struct type *enclosing_type;
+ int embedded_offset;
+ int pointed_to_offset;
+
+ /* 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;
+
+ /* Register number if the value is from a register. */
+ short regnum;
+
+ /* 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).
+
+ WARNING: This field is used by the code which handles watchpoints
+ (see breakpoint.c) to decide whether a particular value can be
+ watched by hardware watchpoints. If the lazy flag is set for
+ some member of a value chain, it is assumed that this member of
+ the chain doesn't need to be watched as part of watching the
+ value itself. This is how GDB avoids watching the entire struct
+ or array when the user wants to watch a single struct member or
+ array element. If you ever change the way lazy flag is set and
+ reset, be sure to consider this use as well! */
+ 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. Note that a value therefore extends beyond what is
+ declared here. */
+ union
+ {
+ bfd_byte contents[1];
+ DOUBLEST force_doublest_align;
+ LONGEST force_longest_align;
+ CORE_ADDR force_core_addr_align;
+ void *force_pointer_align;
+ } aligner;
+ /* Do not add any new members here -- contents above will trash
+ them. */
};
-#define VALUE_TYPE(val) (val)->type
-#define VALUE_ENCLOSING_TYPE(val) (val)->enclosing_type
+
+extern struct type *value_type (struct value *);
+extern int value_bitsize (struct value *);
+extern int value_bitpos (struct value *);
+extern int value_offset (struct value *);
+
+extern struct type *value_enclosing_type (struct value *);
+extern int value_lazy (struct value *);
#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
+/* 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.
+ being debugged if it hasn't already been loaded
+ (value_contents_writeable() is used when a writeable but fetched
+ buffer is required).. 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.
Note: The contents pointer is adjusted by the offset required to
get to the real subobject, if the value happens to represent
something embedded in a larger run-time object. */
-#define VALUE_CONTENTS_RAW(val) \
- ((char *) (val)->aligner.contents + (val)->embedded_offset)
-#define VALUE_CONTENTS(val) \
- ((void)(VALUE_LAZY(val) && value_fetch_lazy(val)), VALUE_CONTENTS_RAW(val))
+extern bfd_byte *value_contents_raw (struct value *);
+extern const bfd_byte *value_contents (struct value *);
+extern bfd_byte *value_contents_writeable (struct value *);
/* The ALL variants of the above two macros do not adjust the returned
pointer by the embedded_offset value. */
-#define VALUE_CONTENTS_ALL_RAW(val) ((char *) (val)->aligner.contents)
-#define VALUE_CONTENTS_ALL(val) \
- ((void) (VALUE_LAZY(val) && value_fetch_lazy(val)), \
- VALUE_CONTENTS_ALL_RAW(val))
+extern bfd_byte *value_contents_all_raw (struct value *);
+extern const bfd_byte *value_contents_all (struct value *);
extern int value_fetch_lazy (struct 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_ID(val) ((val)->frame_id)
-#define VALUE_OFFSET(val) (val)->offset
-#define VALUE_BITSIZE(val) (val)->bitsize
-#define VALUE_BITPOS(val) (val)->bitpos
-#define VALUE_NEXT(val) (val)->next
-#define VALUE_REGNO(val) (val)->regno
+#define VALUE_REGNUM(val) (val)->regnum
#define VALUE_OPTIMIZED_OUT(val) ((val)->optimized_out)
#define VALUE_EMBEDDED_OFFSET(val) ((val)->embedded_offset)
#define VALUE_POINTED_TO_OFFSET(val) ((val)->pointed_to_offset)
-#define VALUE_BFD_SECTION(val) ((val)->bfd_section)
/* Convert a REF to the object referenced. */
-#define COERCE_REF(arg) \
- do { \
- struct type *value_type_arg_tmp = check_typedef (VALUE_TYPE (arg)); \
- if (TYPE_CODE (value_type_arg_tmp) == TYPE_CODE_REF) \
- arg = value_at_lazy (TYPE_TARGET_TYPE (value_type_arg_tmp), \
- unpack_pointer (VALUE_TYPE (arg), \
- VALUE_CONTENTS (arg)), \
- VALUE_BFD_SECTION (arg)); \
- } while (0)
+extern struct value *coerce_ref (struct value *value);
/* If ARG is an array, convert it to a pointer.
If ARG is an enum, convert it to an integer.
References are dereferenced. */
-#define COERCE_ARRAY(arg) \
- do { \
- COERCE_REF(arg); \
- if (current_language->c_style_arrays \
- && 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); \
- } while (0)
-
-#define COERCE_NUMBER(arg) \
- do { COERCE_ARRAY(arg); COERCE_ENUM(arg); } while (0)
-
-/* NOTE: cagney/2002-12-17: This macro was handling a chill language
- problem but that language has gone away. */
-#define COERCE_VARYING_ARRAY(arg, real_arg_type)
+extern struct value *coerce_array (struct value *value);
+extern struct value *coerce_number (struct value *value);
/* If ARG is an enum, convert it to an integer. */
-#define COERCE_ENUM(arg) \
- do { \
- if (TYPE_CODE (check_typedef (VALUE_TYPE (arg))) == TYPE_CODE_ENUM) \
- arg = value_cast (builtin_type_unsigned_int, arg); \
- } while (0)
+extern struct value *coerce_enum (struct value *value);
/* Internal variables (variables for convenience of use of debugger)
are recorded as a chain of these structures. */
extern struct value *value_from_double (struct type *type, DOUBLEST num);
extern struct value *value_from_string (char *string);
-extern struct value *value_at (struct type *type, CORE_ADDR addr,
- asection * sect);
-extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr,
- asection * sect);
+extern struct value *value_at (struct type *type, CORE_ADDR addr);
+extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
extern struct value *value_from_register (struct type *type, int regnum,
struct frame_info *frame);
extern struct value *value_of_variable (struct symbol *var, struct block *b);
-extern struct value *value_of_register (int regnum,
- struct frame_info *frame);
+extern struct value *value_of_register (int regnum, struct frame_info *frame);
extern int symbol_read_needs_frame (struct symbol *);
extern struct value *value_bitstring (char *ptr, int len);
extern struct value *value_array (int lowbound, int highbound,
- struct value ** elemvec);
+ struct value **elemvec);
extern struct value *value_concat (struct value *arg1, struct value *arg2);
extern struct value *value_addr (struct value *arg1);
-extern struct value *value_assign (struct value *toval, struct value *fromval);
+extern struct value *value_assign (struct value *toval,
+ struct value *fromval);
extern struct value *value_neg (struct value *arg1);
char *err);
extern struct value *value_aggregate_elt (struct type *curtype,
- char *name,
- enum noside noside);
+ char *name, enum noside noside);
extern struct value *value_static_field (struct type *type, int fieldno);
extern struct value *value_in (struct value *element, struct value *set);
-extern int value_bit_index (struct type *type, char *addr, int index);
+extern int value_bit_index (struct type *type, const bfd_byte *addr,
+ int index);
extern int using_struct_return (struct type *value_type, int gcc_p);
extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
enum noside noside);
-extern struct value *value_fn_field (struct value ** arg1p, struct fn_field *f,
+extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
int j, struct type *type, int offset);
extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
extern void modify_field (char *addr, LONGEST fieldval, int bitpos,
int bitsize);
-extern void type_print (struct type * type, char *varstring,
- struct ui_file * stream, int show);
+extern void type_print (struct type *type, char *varstring,
+ struct ui_file *stream, int show);
extern char *baseclass_addr (struct type *type, int index, char *valaddr,
struct value **valuep, int *errp);
-extern void print_longest (struct ui_file * stream, int format,
+extern void print_longest (struct ui_file *stream, int format,
int use_local, LONGEST val);
-extern void print_floating (char *valaddr, struct type * type,
- struct ui_file * stream);
+extern void print_floating (const bfd_byte *valaddr, struct type *type,
+ struct ui_file *stream);
extern int value_print (struct value *val, struct ui_file *stream, int format,
enum val_prettyprint pretty);
extern struct value *value_release_to_mark (struct value *mark);
-extern int val_print (struct type * type, char *valaddr,
+extern int val_print (struct type *type, const bfd_byte *valaddr,
int embedded_offset, CORE_ADDR address,
- struct ui_file * stream, int format,
+ struct ui_file *stream, int format,
int deref_ref, int recurse,
enum val_prettyprint pretty);
-extern int val_print_string (CORE_ADDR addr, int len, int width, struct ui_file *stream);
+extern int val_print_string (CORE_ADDR addr, int len, int width,
+ struct ui_file *stream);
-extern void print_variable_value (struct symbol * var,
- struct frame_info * frame,
+extern void print_variable_value (struct symbol *var,
+ struct frame_info *frame,
struct ui_file *stream);
extern int check_field (struct value *, const char *);
-extern void typedef_print (struct type * type, struct symbol * news,
- struct ui_file * stream);
+extern void typedef_print (struct type *type, struct symbol *news,
+ struct ui_file *stream);
extern char *internalvar_name (struct internalvar *var);
extern struct value *value_literal_complex (struct value *, struct value *,
struct type *);
-extern void find_rt_vbase_offset (struct type *, struct type *, char *, int,
- int *, int *);
+extern void find_rt_vbase_offset (struct type *, struct type *,
+ const bfd_byte *, int, int *, int *);
extern struct value *find_function_in_inferior (const char *);
extern struct value *value_allocate_space_in_inferior (int);
-extern CORE_ADDR legacy_push_arguments (int nargs, struct value ** args,
- CORE_ADDR sp, int struct_return,
- CORE_ADDR struct_addr);
-
extern struct value *value_of_local (const char *name, int complain);
#endif /* !defined (VALUE_H) */
projects / deliverable / binutils-gdb.git / blobdiff