/* Prototypes for exported functions. */
-void _initialize_values PARAMS ((void));
+void _initialize_values (void);
/* Prototypes for local functions. */
-static value_ptr value_headof PARAMS ((value_ptr, struct type *,
- struct type *));
+static value_ptr value_headof (value_ptr, struct type *, struct type *);
-static void show_values PARAMS ((char *, int));
+static void show_values (char *, int);
-static void show_convenience PARAMS ((char *, int));
+static void show_convenience (char *, int);
-static int vb_match PARAMS ((struct type *, int, struct type *));
+static int vb_match (struct type *, int, struct type *);
/* The value-history records all the values printed
by print commands during this session. Each chunk
/* Allocate a value that has the correct length for type TYPE. */
value_ptr
-allocate_value (type)
- struct type *type;
+allocate_value (struct type *type)
{
register value_ptr val;
struct type *atype = check_typedef (type);
for COUNT repetitions type TYPE. */
value_ptr
-allocate_repeat_value (type, count)
- struct type *type;
- int count;
+allocate_repeat_value (struct type *type, int count)
{
int low_bound = current_language->string_lower_bound; /* ??? */
/* FIXME-type-allocation: need a way to free this type when we are
mark is obtained (except for those released) are subject to being freed
if a subsequent value_free_to_mark is passed the mark. */
value_ptr
-value_mark ()
+value_mark (void)
{
return all_values;
}
/* Free all values allocated since MARK was obtained by value_mark
(except for those released). */
void
-value_free_to_mark (mark)
- value_ptr mark;
+value_free_to_mark (value_ptr mark)
{
value_ptr val, next;
Called after each command, successful or not. */
void
-free_all_values ()
+free_all_values (void)
{
register value_ptr val, next;
so it will not be freed automatically. */
void
-release_value (val)
- register value_ptr val;
+release_value (register value_ptr val)
{
register value_ptr v;
/* Release all values up to mark */
value_ptr
-value_release_to_mark (mark)
- value_ptr mark;
+value_release_to_mark (value_ptr mark)
{
value_ptr val, next;
but it's a different block of storage. */
value_ptr
-value_copy (arg)
- value_ptr arg;
+value_copy (value_ptr arg)
{
register struct type *encl_type = VALUE_ENCLOSING_TYPE (arg);
register value_ptr val = allocate_value (encl_type);
value history index of this new item. */
int
-record_latest_value (val)
- value_ptr val;
+record_latest_value (value_ptr val)
{
int i;
/* Return a copy of the value in the history with sequence number NUM. */
value_ptr
-access_value_history (num)
- int num;
+access_value_history (int num)
{
register struct value_history_chunk *chunk;
register int i;
because the type pointers become invalid. */
void
-clear_value_history ()
+clear_value_history (void)
{
register struct value_history_chunk *next;
register int i;
}
static void
-show_values (num_exp, from_tty)
- char *num_exp;
- int from_tty;
+show_values (char *num_exp, int from_tty)
{
register int i;
register value_ptr val;
one is created, with a void value. */
struct internalvar *
-lookup_internalvar (name)
- char *name;
+lookup_internalvar (char *name)
{
register struct internalvar *var;
}
value_ptr
-value_of_internalvar (var)
- struct internalvar *var;
+value_of_internalvar (struct internalvar *var)
{
register value_ptr val;
}
void
-set_internalvar_component (var, offset, bitpos, bitsize, newval)
- struct internalvar *var;
- int offset, bitpos, bitsize;
- value_ptr newval;
+set_internalvar_component (struct internalvar *var, int offset, int bitpos,
+ int bitsize, value_ptr newval)
{
register char *addr = VALUE_CONTENTS (var->value) + offset;
}
void
-set_internalvar (var, val)
- struct internalvar *var;
- value_ptr val;
+set_internalvar (struct internalvar *var, value_ptr val)
{
value_ptr newval;
}
char *
-internalvar_name (var)
- struct internalvar *var;
+internalvar_name (struct internalvar *var)
{
return var->name;
}
because that makes the values invalid. */
void
-clear_internalvars ()
+clear_internalvars (void)
{
register struct internalvar *var;
}
static void
-show_convenience (ignore, from_tty)
- char *ignore;
- int from_tty;
+show_convenience (char *ignore, int from_tty)
{
register struct internalvar *var;
int varseen = 0;
Does not deallocate the value. */
LONGEST
-value_as_long (val)
- register value_ptr val;
+value_as_long (register value_ptr val)
{
/* This coerces arrays and functions, which is necessary (e.g.
in disassemble_command). It also dereferences references, which
}
DOUBLEST
-value_as_double (val)
- register value_ptr val;
+value_as_double (register value_ptr val)
{
DOUBLEST foo;
int inv;
error ("Invalid floating value found in program.");
return foo;
}
-/* Extract a value as a C pointer.
- Does not deallocate the value. */
+/* Extract a value as a C pointer. Does not deallocate the value.
+ Note that val's type may not actually be a pointer; value_as_long
+ handles all the cases. */
CORE_ADDR
-value_as_pointer (val)
- value_ptr val;
+value_as_pointer (value_ptr val)
{
/* Assume a CORE_ADDR can fit in a LONGEST (for now). Not sure
whether we want this to be true eventually. */
for pointers to char, in which the low bits *are* significant. */
return ADDR_BITS_REMOVE (value_as_long (val));
#else
- return value_as_long (val);
+ COERCE_ARRAY (val);
+ /* In converting VAL to an address (CORE_ADDR), any small integers
+ are first cast to a generic pointer. The function unpack_long
+ will then correctly convert that pointer into a canonical address
+ (using POINTER_TO_ADDRESS).
+
+ Without the cast, the MIPS gets: 0xa0000000 -> (unsigned int)
+ 0xa0000000 -> (LONGEST) 0x00000000a0000000
+
+ With the cast, the MIPS gets: 0xa0000000 -> (unsigned int)
+ 0xa0000000 -> (void*) 0xa0000000 -> (LONGEST) 0xffffffffa0000000.
+
+ If the user specifies an integer that is larger than the target
+ pointer type, it is assumed that it was intentional and the value
+ is converted directly into an ADDRESS. This ensures that no
+ information is discarded.
+
+ NOTE: The cast operation may eventualy be converted into a TARGET
+ method (see POINTER_TO_ADDRESS() and ADDRESS_TO_POINTER()) so
+ that the TARGET ISA/ABI can apply an arbitrary conversion.
+
+ NOTE: In pure harvard architectures function and data pointers
+ can be different and may require different integer to pointer
+ conversions. */
+ if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_INT
+ && TYPE_LENGTH (VALUE_TYPE (val)) <= TYPE_LENGTH (builtin_type_ptr))
+ {
+ val = value_cast (builtin_type_ptr, val);
+ }
+ return unpack_long (VALUE_TYPE (val), VALUE_CONTENTS (val));
#endif
}
\f
to an INT (or some size). After all, it is only an offset. */
LONGEST
-unpack_long (type, valaddr)
- struct type *type;
- char *valaddr;
+unpack_long (struct type *type, char *valaddr)
{
register enum type_code code = TYPE_CODE (type);
register int len = TYPE_LENGTH (type);
if (GDB_TARGET_IS_D10V
&& len == 2)
return D10V_MAKE_DADDR (extract_address (valaddr, len));
- return extract_address (valaddr, len);
+ return extract_typed_address (valaddr, type);
case TYPE_CODE_MEMBER:
error ("not implemented: member types in unpack_long");
format, result is in host format. */
DOUBLEST
-unpack_double (type, valaddr, invp)
- struct type *type;
- char *valaddr;
- int *invp;
+unpack_double (struct type *type, char *valaddr, int *invp)
{
enum type_code code;
int len;
to an INT (or some size). After all, it is only an offset. */
CORE_ADDR
-unpack_pointer (type, valaddr)
- struct type *type;
- char *valaddr;
+unpack_pointer (struct type *type, char *valaddr)
{
/* Assume a CORE_ADDR can fit in a LONGEST (for now). Not sure
whether we want this to be true eventually. */
return unpack_long (type, valaddr);
}
+
\f
/* Get the value of the FIELDN'th field (which must be static) of TYPE. */
value_ptr
-value_static_field (type, fieldno)
- struct type *type;
- int fieldno;
+value_static_field (struct type *type, int fieldno)
{
CORE_ADDR addr;
asection *sect;
FIELDNO says which field. */
value_ptr
-value_primitive_field (arg1, offset, fieldno, arg_type)
- register value_ptr arg1;
- int offset;
- register int fieldno;
- register struct type *arg_type;
+value_primitive_field (register value_ptr arg1, int offset,
+ register int fieldno, register struct type *arg_type)
{
register value_ptr v;
register struct type *type;
fieldno));
VALUE_BITPOS (v) = TYPE_FIELD_BITPOS (arg_type, fieldno) % 8;
VALUE_BITSIZE (v) = TYPE_FIELD_BITSIZE (arg_type, fieldno);
+ VALUE_OFFSET (v) = VALUE_OFFSET (arg1) + offset
+ + TYPE_FIELD_BITPOS (arg_type, fieldno) / 8;
}
else if (fieldno < TYPE_N_BASECLASSES (arg_type))
{
if (VALUE_LVAL (arg1) == lval_internalvar)
VALUE_LVAL (v) = lval_internalvar_component;
VALUE_ADDRESS (v) = VALUE_ADDRESS (arg1);
+ VALUE_REGNO (v) = VALUE_REGNO (arg1);
/* VALUE_OFFSET (v) = VALUE_OFFSET (arg1) + offset
+ TYPE_FIELD_BITPOS (arg_type, fieldno) / 8; */
return v;
FIELDNO says which field. */
value_ptr
-value_field (arg1, fieldno)
- register value_ptr arg1;
- register int fieldno;
+value_field (register value_ptr arg1, register int fieldno)
{
return value_primitive_field (arg1, 0, fieldno, VALUE_TYPE (arg1));
}
J is an index into F which provides the desired method. */
value_ptr
-value_fn_field (arg1p, f, j, type, offset)
- value_ptr *arg1p;
- struct fn_field *f;
- int j;
- struct type *type;
- int offset;
+value_fn_field (value_ptr *arg1p, struct fn_field *f, int j, struct type *type,
+ int offset)
{
register value_ptr v;
register struct type *ftype = TYPE_FN_FIELD_TYPE (f, j);
*arg1p = value_ind (value_cast (lookup_pointer_type (type),
value_addr (*arg1p)));
- /* Move the `this' pointer according to the offset.
+ /* Move the `this' pointer according to the offset.
VALUE_OFFSET (*arg1p) += offset;
*/
}
TYPE is the type in which F is located. */
value_ptr
-value_virtual_fn_field (arg1p, f, j, type, offset)
- value_ptr *arg1p;
- struct fn_field *f;
- int j;
- struct type *type;
- int offset;
+value_virtual_fn_field (value_ptr *arg1p, struct fn_field *f, int j,
+ struct type *type, int offset)
{
value_ptr arg1 = *arg1p;
struct type *type1 = check_typedef (VALUE_TYPE (arg1));
/* Deal with HP/Taligent runtime model for virtual functions */
value_ptr vp;
value_ptr argp; /* arg1 cast to base */
- CORE_ADDR vfunc_addr; /* address of virtual method */
CORE_ADDR coreptr; /* pointer to target address */
int class_index; /* which class segment pointer to use */
struct type *ftype = TYPE_FN_FIELD_TYPE (f, j); /* method type */
return the most derived type we find. The caller must
be satisfied when the return value == DTYPE.
- FIXME-tiemann: should work with dossier entries as well. */
+ FIXME-tiemann: should work with dossier entries as well.
+ NOTICE - djb: I see no good reason at all to keep this function now that
+ we have RTTI support. It's used in literally one place, and it's
+ hard to keep this function up to date when it's purpose is served
+ by value_rtti_type efficiently.
+ Consider it gone for 5.1. */
static value_ptr
-value_headof (in_arg, btype, dtype)
- value_ptr in_arg;
- struct type *btype, *dtype;
+value_headof (value_ptr in_arg, struct type *btype, struct type *dtype)
{
/* First collect the vtables we must look at for this object. */
- /* FIXME-tiemann: right now, just look at top-most vtable. */
- value_ptr arg, vtbl, entry, best_entry = 0;
- int i, nelems;
- int offset, best_offset = 0;
+ value_ptr arg, vtbl;
struct symbol *sym;
- CORE_ADDR pc_for_sym;
char *demangled_name;
struct minimal_symbol *msymbol;
CHECK_TYPEDEF (btype);
arg = in_arg;
if (btype != dtype)
- arg = value_cast (lookup_pointer_type (btype), arg);
+ arg = value_cast (lookup_pointer_type (btype), arg);
+ if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_REF)
+ {
+ /*
+ * Copy the value, but change the type from (T&) to (T*).
+ * We keep the same location information, which is efficient,
+ * and allows &(&X) to get the location containing the reference.
+ */
+ arg = value_copy (arg);
+ VALUE_TYPE (arg) = lookup_pointer_type (TYPE_TARGET_TYPE (VALUE_TYPE (arg)));
+ }
+ if (VALUE_ADDRESS(value_field (value_ind(arg), TYPE_VPTR_FIELDNO (btype)))==0)
+ return arg;
+
vtbl = value_ind (value_field (value_ind (arg), TYPE_VPTR_FIELDNO (btype)));
+ /* Turn vtable into typeinfo function */
+ VALUE_OFFSET(vtbl)+=4;
- /* Check that VTBL looks like it points to a virtual function table. */
- msymbol = lookup_minimal_symbol_by_pc (VALUE_ADDRESS (vtbl));
+ msymbol = lookup_minimal_symbol_by_pc ( value_as_pointer(value_ind(vtbl)) );
if (msymbol == NULL
- || (demangled_name = SYMBOL_NAME (msymbol)) == NULL
- || !VTBL_PREFIX_P (demangled_name))
- {
- /* If we expected to find a vtable, but did not, let the user
- know that we aren't happy, but don't throw an error.
- FIXME: there has to be a better way to do this. */
- struct type *error_type = (struct type *) xmalloc (sizeof (struct type));
- memcpy (error_type, VALUE_TYPE (in_arg), sizeof (struct type));
- TYPE_NAME (error_type) = savestring ("suspicious *", sizeof ("suspicious *"));
- VALUE_TYPE (in_arg) = error_type;
- return in_arg;
- }
+ || (demangled_name = SYMBOL_NAME (msymbol)) == NULL)
+ {
+ /* If we expected to find a vtable, but did not, let the user
+ know that we aren't happy, but don't throw an error.
+ FIXME: there has to be a better way to do this. */
+ struct type *error_type = (struct type *) xmalloc (sizeof (struct type));
+ memcpy (error_type, VALUE_TYPE (in_arg), sizeof (struct type));
+ TYPE_NAME (error_type) = savestring ("suspicious *", sizeof ("suspicious *"));
+ VALUE_TYPE (in_arg) = error_type;
+ return in_arg;
+ }
+ demangled_name = cplus_demangle(demangled_name,DMGL_ANSI);
+ *(strchr (demangled_name, ' ')) = '\0';
- /* Now search through the virtual function table. */
- entry = value_ind (vtbl);
- nelems = longest_to_int (value_as_long (value_field (entry, 2)));
- for (i = 1; i <= nelems; i++)
- {
- entry = value_subscript (vtbl, value_from_longest (builtin_type_int,
- (LONGEST) i));
- /* This won't work if we're using thunks. */
- if (TYPE_CODE (check_typedef (VALUE_TYPE (entry))) != TYPE_CODE_STRUCT)
- break;
- offset = longest_to_int (value_as_long (value_field (entry, 0)));
- /* If we use '<=' we can handle single inheritance
- * where all offsets are zero - just use the first entry found. */
- if (offset <= best_offset)
- {
- best_offset = offset;
- best_entry = entry;
- }
- }
- /* Move the pointer according to BEST_ENTRY's offset, and figure
- out what type we should return as the new pointer. */
- if (best_entry == 0)
- {
- /* An alternative method (which should no longer be necessary).
- * But we leave it in for future use, when we will hopefully
- * have optimizes the vtable to use thunks instead of offsets. */
- /* Use the name of vtable itself to extract a base type. */
- demangled_name += 4; /* Skip _vt$ prefix. */
- }
- else
- {
- pc_for_sym = value_as_pointer (value_field (best_entry, 2));
- sym = find_pc_function (pc_for_sym);
- demangled_name = cplus_demangle (SYMBOL_NAME (sym), DMGL_ANSI);
- *(strchr (demangled_name, ':')) = '\0';
- }
sym = lookup_symbol (demangled_name, 0, VAR_NAMESPACE, 0, 0);
if (sym == NULL)
- error ("could not find type declaration for `%s'", demangled_name);
- if (best_entry)
- {
- free (demangled_name);
- arg = value_add (value_cast (builtin_type_int, arg),
- value_field (best_entry, 0));
- }
- else
- arg = in_arg;
+ error ("could not find type declaration for `%s'", demangled_name);
+
+ arg = in_arg;
VALUE_TYPE (arg) = lookup_pointer_type (SYMBOL_TYPE (sym));
return arg;
}
could actually be a pointer to. */
value_ptr
-value_from_vtable_info (arg, type)
- value_ptr arg;
- struct type *type;
+value_from_vtable_info (value_ptr arg, struct type *type)
{
/* Take care of preliminaries. */
if (TYPE_VPTR_FIELDNO (type) < 0)
pointer which is for the base class whose type is BASECLASS. */
static int
-vb_match (type, index, basetype)
- struct type *type;
- int index;
- struct type *basetype;
+vb_match (struct type *type, int index, struct type *basetype)
{
struct type *fieldtype;
char *name = TYPE_FIELD_NAME (type, index);
-1 is returned on error. */
int
-baseclass_offset (type, index, valaddr, address)
- struct type *type;
- int index;
- char *valaddr;
- CORE_ADDR address;
+baseclass_offset (struct type *type, int index, char *valaddr,
+ CORE_ADDR address)
{
struct type *basetype = TYPE_BASECLASS (type, index);
If the field is signed, we also do sign extension. */
LONGEST
-unpack_field_as_long (type, valaddr, fieldno)
- struct type *type;
- char *valaddr;
- int fieldno;
+unpack_field_as_long (struct type *type, char *valaddr, int fieldno)
{
ULONGEST val;
ULONGEST valmask;
indicate which bits (in target bit order) comprise the bitfield. */
void
-modify_field (addr, fieldval, bitpos, bitsize)
- char *addr;
- LONGEST fieldval;
- int bitpos, bitsize;
+modify_field (char *addr, LONGEST fieldval, int bitpos, int bitsize)
{
LONGEST oword;
/* Convert C numbers into newly allocated values */
value_ptr
-value_from_longest (type, num)
- struct type *type;
- register LONGEST num;
+value_from_longest (struct type *type, register LONGEST num)
{
register value_ptr val = allocate_value (type);
register enum type_code code;
case TYPE_CODE_REF:
case TYPE_CODE_PTR:
- /* This assumes that all pointers of a given length
- have the same form. */
- store_address (VALUE_CONTENTS_RAW (val), len, (CORE_ADDR) num);
+ store_typed_address (VALUE_CONTENTS_RAW (val), type, (CORE_ADDR) num);
break;
default:
return val;
}
+
+/* Create a value representing a pointer of type TYPE to the address
+ ADDR. */
+value_ptr
+value_from_pointer (struct type *type, CORE_ADDR addr)
+{
+ value_ptr val = allocate_value (type);
+ store_typed_address (VALUE_CONTENTS_RAW (val), type, addr);
+ return val;
+}
+
+
/* Create a value for a string constant to be stored locally
- (not in the inferior's memory space, but in GDB memory).
+ (not in the inferior's memory space, but in GDB memory).
This is analogous to value_from_longest, which also does not
use inferior memory. String shall NOT contain embedded nulls. */
value_ptr
-value_from_string (ptr)
- char *ptr;
+value_from_string (char *ptr)
{
value_ptr val;
int len = strlen (ptr);
}
value_ptr
-value_from_double (type, num)
- struct type *type;
- DOUBLEST num;
+value_from_double (struct type *type, DOUBLEST num)
{
register value_ptr val = allocate_value (type);
struct type *base_type = check_typedef (type);
handled wrong. */
int
-generic_use_struct_convention (gcc_p, value_type)
- int gcc_p;
- struct type *value_type;
+generic_use_struct_convention (int gcc_p, struct type *value_type)
{
return !((gcc_p == 1)
&& (TYPE_LENGTH (value_type) == 1
#define USE_STRUCT_CONVENTION(gcc_p,type) generic_use_struct_convention (gcc_p, type)
#endif
-/* Some fundamental types (such as long double) are returned on the stack for
- certain architectures. This macro should return true for any type besides
- struct, union or array that gets returned on the stack. */
-
-#ifndef RETURN_VALUE_ON_STACK
-#define RETURN_VALUE_ON_STACK(TYPE) 0
-#endif
/* Return true if the function specified is using the structure returning
convention on this machine to return arguments, or 0 if it is using
function wants to return. */
void
-set_return_value (val)
- value_ptr val;
+set_return_value (value_ptr val)
{
struct type *type = check_typedef (VALUE_TYPE (val));
register enum type_code code = TYPE_CODE (type);
}
\f
void
-_initialize_values ()
+_initialize_values (void)
{
add_cmd ("convenience", no_class, show_convenience,
"Debugger convenience (\"$foo\") variables.\n\
projects / deliverable / binutils-gdb.git / blobdiff