/* Perform non-arithmetic operations on values, for GDB.
- Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
#include "defs.h"
-#include "param.h"
#include "symtab.h"
+#include "gdbtypes.h"
#include "value.h"
#include "frame.h"
#include "inferior.h"
#include <errno.h>
/* Local functions. */
-static value search_struct_field ();
+
+static CORE_ADDR
+find_function_addr PARAMS ((value, struct type **));
+
+static CORE_ADDR
+value_push PARAMS ((CORE_ADDR, value));
+
+static CORE_ADDR
+value_arg_push PARAMS ((CORE_ADDR, value));
+
+static value
+search_struct_field PARAMS ((char *, value, int, struct type *, int));
+
+static value
+search_struct_method PARAMS ((char *, value, value *, int, int *,
+ struct type *));
+
+static int
+check_field_in PARAMS ((struct type *, const char *));
+
\f
/* Cast value ARG2 to type TYPE and return as a value.
More general than a C cast: accepts any two types of the same length,
offset the pointer rather than just change its type. */
struct type *t1 = TYPE_TARGET_TYPE (type);
struct type *t2 = TYPE_TARGET_TYPE (VALUE_TYPE (arg2));
- if (TYPE_CODE (t1) == TYPE_CODE_STRUCT
+ if ( TYPE_CODE (t1) == TYPE_CODE_STRUCT
&& TYPE_CODE (t2) == TYPE_CODE_STRUCT
&& TYPE_NAME (t1) != 0) /* if name unknown, can't have supercl */
{
{
register value val = allocate_value (type);
- bzero (VALUE_CONTENTS (val), TYPE_LENGTH (type));
+ memset (VALUE_CONTENTS (val), 0, TYPE_LENGTH (type));
VALUE_LVAL (val) = lv;
return val;
int use_buffer = 0;
COERCE_ARRAY (fromval);
+ COERCE_REF (toval);
if (VALUE_LVAL (toval) != lval_internalvar)
fromval = value_cast (type, fromval);
int regno = VALUE_REGNO (toval);
if (VALUE_TYPE (fromval) != REGISTER_VIRTUAL_TYPE (regno))
fromval = value_cast (REGISTER_VIRTUAL_TYPE (regno), fromval);
- bcopy (VALUE_CONTENTS (fromval), virtual_buffer,
+ memcpy (virtual_buffer, VALUE_CONTENTS (fromval),
REGISTER_VIRTUAL_SIZE (regno));
target_convert_from_virtual (regno, virtual_buffer, raw_buffer);
use_buffer = REGISTER_RAW_SIZE (regno);
{
int v; /* FIXME, this won't work for large bitfields */
read_memory (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
- &v, sizeof v);
- modify_field (&v, (int) value_as_long (fromval),
+ (char *) &v, sizeof v);
+ modify_field ((char *) &v, (int) value_as_long (fromval),
VALUE_BITPOS (toval), VALUE_BITSIZE (toval));
write_memory (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
(char *)&v, sizeof v);
int v;
read_register_bytes (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
- &v, sizeof v);
- modify_field (&v, (int) value_as_long (fromval),
+ (char *) &v, sizeof v);
+ modify_field ((char *) &v, (int) value_as_long (fromval),
VALUE_BITPOS (toval), VALUE_BITSIZE (toval));
write_register_bytes (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
- &v, sizeof v);
+ (char *) &v, sizeof v);
}
else if (use_buffer)
write_register_bytes (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
amount_copied += reg_size, regno++)
{
get_saved_register (buffer + amount_copied,
- (int *)NULL, (CORE_ADDR)NULL,
+ (int *)NULL, (CORE_ADDR *)NULL,
frame, regno, (enum lval_type *)NULL);
}
(int) value_as_long (fromval),
VALUE_BITPOS (toval), VALUE_BITSIZE (toval));
else if (use_buffer)
- bcopy (raw_buffer, buffer + byte_offset, use_buffer);
+ memcpy (buffer + byte_offset, raw_buffer, use_buffer);
else
- bcopy (VALUE_CONTENTS (fromval), buffer + byte_offset,
- TYPE_LENGTH (type));
+ memcpy (buffer + byte_offset, VALUE_CONTENTS (fromval),
+ TYPE_LENGTH (type));
/* Copy it back. */
for ((regno = VALUE_FRAME_REGNUM (toval) + reg_offset,
}
val = allocate_value (type);
- bcopy (toval, val, VALUE_CONTENTS_RAW (val) - (char *) val);
- bcopy (VALUE_CONTENTS (fromval), VALUE_CONTENTS_RAW (val), TYPE_LENGTH (type));
+ memcpy (val, toval, VALUE_CONTENTS_RAW (val) - (char *) val);
+ memcpy (VALUE_CONTENTS_RAW (val), VALUE_CONTENTS (fromval),
+ TYPE_LENGTH (type));
VALUE_TYPE (val) = type;
return val;
value_addr (arg1)
value arg1;
{
-
- COERCE_REF(arg1);
+ struct type *type = VALUE_TYPE (arg1);
+ if (TYPE_CODE (type) == 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. */
+ value arg2 = value_copy (arg1);
+ VALUE_TYPE (arg2) = lookup_pointer_type (TYPE_TARGET_TYPE (type));
+ return arg2;
+ }
if (VALUE_REPEATED (arg1)
- || TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_ARRAY)
+ || TYPE_CODE (type) == TYPE_CODE_ARRAY)
return value_coerce_array (arg1);
- if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_FUNC)
+ if (TYPE_CODE (type) == TYPE_CODE_FUNC)
return value_coerce_function (arg1);
if (VALUE_LVAL (arg1) != lval_memory)
error ("Attempt to take address of value not located in memory.");
- return value_from_longest (lookup_pointer_type (VALUE_TYPE (arg1)),
+ return value_from_longest (lookup_pointer_type (type),
(LONGEST) (VALUE_ADDRESS (arg1) + VALUE_OFFSET (arg1)));
}
/* Push onto the stack the specified value VALUE. */
-CORE_ADDR
+static CORE_ADDR
value_push (sp, arg)
register CORE_ADDR sp;
value arg;
type = VALUE_TYPE (arg);
if (TYPE_CODE (type) == TYPE_CODE_INT
- && TYPE_LENGTH (type) < sizeof (int))
+ && TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_int))
return value_cast (builtin_type_int, arg);
- if (type == builtin_type_float)
+ if (TYPE_CODE (type) == TYPE_CODE_FLT
+ && TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_double))
return value_cast (builtin_type_double, arg);
return arg;
/* Push the value ARG, first coercing it as an argument
to a C function. */
-CORE_ADDR
+static CORE_ADDR
value_arg_push (sp, arg)
register CORE_ADDR sp;
value arg;
/* Determine a function's address and its return type from its value.
Calls error() if the function is not valid for calling. */
-CORE_ADDR
+static CORE_ADDR
find_function_addr (function, retval_type)
value function;
struct type **retval_type;
CORE_ADDR funaddr;
int using_gcc;
+ if (!target_has_execution)
+ noprocess();
+
save_inferior_status (&inf_status, 1);
old_chain = make_cleanup (restore_inferior_status, &inf_status);
/* Create a call sequence customized for this function
and the number of arguments for it. */
- bcopy (dummy, dummy1, sizeof dummy);
+ memcpy (dummy1, dummy, sizeof dummy);
for (i = 0; i < sizeof dummy / sizeof (REGISTER_TYPE); i++)
SWAP_TARGET_AND_HOST (&dummy1[i], sizeof (REGISTER_TYPE));
FIX_CALL_DUMMY (dummy1, start_sp, funaddr, nargs, args,
}
else
{
- register int j;
- j = lookup_misc_func ("malloc");
- if (j >= 0)
- val = value_from_longest (
- lookup_pointer_type (lookup_function_type (
- lookup_pointer_type (builtin_type_char))),
- (LONGEST) misc_function_vector[j].address);
+ struct minimal_symbol *msymbol;
+ msymbol = lookup_minimal_symbol ("malloc", (struct objfile *) NULL);
+ if (msymbol != NULL)
+ val =
+ value_from_longest (lookup_pointer_type (lookup_function_type (
+ lookup_pointer_type (builtin_type_char))),
+ (LONGEST) msymbol -> address);
else
error ("String constants require the program to have a function \"malloc\".");
}
blocklen = value_from_longest (builtin_type_int, (LONGEST) (len + 1));
- val = target_call_function (val, 1, &blocklen);
+ val = call_function_by_hand (val, 1, &blocklen);
if (value_zerop (val))
error ("No memory available for string constant.");
write_memory (value_as_pointer (val), copy, len + 1);
\f
/* Helper function used by value_struct_elt to recurse through baseclasses.
Look for a field NAME in ARG1. Adjust the address of ARG1 by OFFSET bytes,
- and treat the result as having type TYPE.
+ and search in it assuming it has (class) type TYPE.
If found, return value, else return NULL.
If LOOKING_FOR_BASECLASS, then instead of looking for struct fields,
if (t_field_name && !strcmp (t_field_name, name))
{
- value v = (TYPE_FIELD_STATIC (type, i)
- ? value_static_field (type, name, i)
- : value_primitive_field (arg1, offset, i, type));
+ value v;
+ if (TYPE_FIELD_STATIC (type, i))
+ {
+ char *phys_name = TYPE_FIELD_STATIC_PHYSNAME (type, i);
+ struct symbol *sym =
+ lookup_symbol (phys_name, 0, VAR_NAMESPACE, 0, NULL);
+ if (! sym) error (
+ "Internal error: could not find physical static variable named %s",
+ phys_name);
+ v = value_at (TYPE_FIELD_TYPE (type, i),
+ (CORE_ADDR)SYMBOL_BLOCK_VALUE (sym));
+ }
+ else
+ v = value_primitive_field (arg1, offset, i, type);
if (v == 0)
error("there is no field named %s", name);
return v;
return v2;
v = search_struct_field (name, v2, 0, TYPE_BASECLASS (type, i),
looking_for_baseclass);
- if (v) return v;
- else continue;
}
- if (found_baseclass)
+ else if (found_baseclass)
v = value_primitive_field (arg1, offset, i, type);
else
v = search_struct_field (name, arg1,
/* Helper function used by value_struct_elt to recurse through baseclasses.
Look for a field NAME in ARG1. Adjust the address of ARG1 by OFFSET bytes,
- and treat the result as having type TYPE.
+ and search in it assuming it has (class) type TYPE.
If found, return value, else return NULL. */
static value
error ("cannot resolve overloaded method `%s'", name);
while (j >= 0)
{
- if (TYPE_FLAGS (TYPE_FN_FIELD_TYPE (f, j)) & TYPE_FLAG_STUB)
+ if (TYPE_FN_FIELD_STUB (f, j))
check_stub_method (type, i, j);
if (!typecmp (TYPE_FN_FIELD_STATIC_P (f, j),
TYPE_FN_FIELD_ARGS (f, j), args))
return (value)value_virtual_fn_field (arg1, f, j, type);
if (TYPE_FN_FIELD_STATIC_P (f, j) && static_memfuncp)
*static_memfuncp = 1;
- return (value)value_fn_field (arg1, i, j);
+ return (value)value_fn_field (f, j);
}
j--;
}
for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
{
- value v;
+ value v, v2;
+ int base_offset;
if (BASETYPE_VIA_VIRTUAL (type, i))
{
- value v2;
baseclass_addr (type, i, VALUE_CONTENTS (arg1) + offset,
&v2, (int *)NULL);
if (v2 == 0)
error ("virtual baseclass botch");
- v = search_struct_method (name, v2, args, 0,
- static_memfuncp, TYPE_BASECLASS (type, i));
- if (v) return v;
- else continue;
+ base_offset = 0;
}
-
- v = search_struct_method (name, arg1, args,
- TYPE_BASECLASS_BITPOS (type, i) / 8,
+ else
+ {
+ v2 = arg1;
+ base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8;
+ }
+ v = search_struct_method (name, v2, args, base_offset,
static_memfuncp, TYPE_BASECLASS (type, i));
if (v) return v;
}
if (TYPE_CODE (t) == TYPE_CODE_MEMBER)
error ("not implemented: member type in value_struct_elt");
- if (TYPE_CODE (t) != TYPE_CODE_STRUCT
+ if ( TYPE_CODE (t) != TYPE_CODE_STRUCT
&& TYPE_CODE (t) != TYPE_CODE_UNION)
error ("Attempt to extract a component of a value that is not a %s.", err);
if (!args[1])
{
/* destructors are a special case. */
- return (value)value_fn_field (*argp, 0,
+ return (value)value_fn_field (TYPE_FN_FIELDLIST1 (t, 0),
TYPE_FN_FIELDLIST_LENGTH (t, 0));
}
else
if NAME is inappropriate for TYPE, an error is signaled. */
int
destructor_name_p (name, type)
- char *name;
- struct type *type;
+ const char *name;
+ const struct type *type;
{
/* destructors are a special case. */
if (name[0] == '~')
{
char *dname = type_name_no_tag (type);
-
- if (! TYPE_HAS_DESTRUCTOR (type))
- error ("type `%s' does not have destructor defined", dname);
if (strcmp (dname, name+1))
error ("name of destructor must equal name of class");
else
static int
check_field_in (type, name)
register struct type *type;
- char *name;
+ const char *name;
{
register int i;
int
check_field (arg1, name)
register value arg1;
- char *name;
+ const char *name;
{
register struct type *t;
if (TYPE_CODE (t) == TYPE_CODE_MEMBER)
error ("not implemented: member type in check_field");
- if (TYPE_CODE (t) != TYPE_CODE_STRUCT
+ if ( TYPE_CODE (t) != TYPE_CODE_STRUCT
&& TYPE_CODE (t) != TYPE_CODE_UNION)
error ("Internal error: `this' is not an aggregate");
return check_field_in (t, name);
}
-/* C++: Given an aggregate type DOMAIN, and a member name NAME,
- return the address of this member as a pointer to member
+/* C++: Given an aggregate type CURTYPE, and a member name NAME,
+ return the address of this member as a "pointer to member"
type. If INTYPE is non-null, then it will be the type
of the member we are looking for. This will help us resolve
- pointers to member functions. */
+ "pointers to member functions". This function is used
+ to resolve user expressions of the form "DOMAIN::NAME". */
value
-value_struct_elt_for_address (domain, intype, name)
- struct type *domain, *intype;
+value_struct_elt_for_reference (domain, offset, curtype, name, intype)
+ struct type *domain, *curtype, *intype;
+ int offset;
char *name;
{
- register struct type *t = domain;
+ register struct type *t = curtype;
register int i;
value v;
- struct type *baseclass;
-
- if (TYPE_CODE (t) != TYPE_CODE_STRUCT
+ if ( TYPE_CODE (t) != TYPE_CODE_STRUCT
&& TYPE_CODE (t) != TYPE_CODE_UNION)
- error ("Internal error: non-aggregate type to value_struct_elt_for_address");
+ error ("Internal error: non-aggregate type to value_struct_elt_for_reference");
- baseclass = t;
-
- while (t)
+ for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); i--)
{
- for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); i--)
+ char *t_field_name = TYPE_FIELD_NAME (t, i);
+
+ if (t_field_name && !strcmp (t_field_name, name))
{
- char *t_field_name = TYPE_FIELD_NAME (t, i);
- if (t_field_name && !strcmp (t_field_name, name))
+ if (TYPE_FIELD_STATIC (t, i))
{
- if (TYPE_FIELD_STATIC (t, i))
- {
- char *phys_name = TYPE_FIELD_STATIC_PHYSNAME (t, i);
- struct symbol *sym =
- lookup_symbol (phys_name, 0, VAR_NAMESPACE, 0, NULL);
- if (! sym) error ("Internal error: could not find physical static variable named %s", phys_name);
- return value_from_longest (
- lookup_pointer_type (TYPE_FIELD_TYPE (t, i)),
- (LONGEST)SYMBOL_BLOCK_VALUE (sym));
- }
- if (TYPE_FIELD_PACKED (t, i))
- error ("pointers to bitfield members not allowed");
-
- return value_from_longest (
- lookup_pointer_type (
- lookup_member_type (TYPE_FIELD_TYPE (t, i), baseclass)),
- (LONGEST) (TYPE_FIELD_BITPOS (t, i) >> 3));
+ char *phys_name = TYPE_FIELD_STATIC_PHYSNAME (t, i);
+ struct symbol *sym =
+ lookup_symbol (phys_name, 0, VAR_NAMESPACE, 0, NULL);
+ if (! sym)
+ error (
+ "Internal error: could not find physical static variable named %s",
+ phys_name);
+ return value_at (SYMBOL_TYPE (sym),
+ (CORE_ADDR)SYMBOL_BLOCK_VALUE (sym));
}
+ if (TYPE_FIELD_PACKED (t, i))
+ error ("pointers to bitfield members not allowed");
+
+ return value_from_longest
+ (lookup_reference_type (lookup_member_type (TYPE_FIELD_TYPE (t, i),
+ domain)),
+ offset + (LONGEST) (TYPE_FIELD_BITPOS (t, i) >> 3));
}
-
- if (TYPE_N_BASECLASSES (t) == 0)
- break;
-
- t = TYPE_BASECLASS (t, 0);
}
/* C++: If it was not found as a data field, then try to
return it as a pointer to a method. */
- t = baseclass;
/* Destructors are a special case. */
if (destructor_name_p (name, t))
{
- error ("pointers to destructors not implemented yet");
+ error ("member pointers to destructors not implemented yet");
}
/* Perform all necessary dereferencing. */
while (intype && TYPE_CODE (intype) == TYPE_CODE_PTR)
intype = TYPE_TARGET_TYPE (intype);
- while (t)
+ for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; --i)
{
- for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; --i)
+ if (!strcmp (TYPE_FN_FIELDLIST_NAME (t, i), name))
{
- if (!strcmp (TYPE_FN_FIELDLIST_NAME (t, i), name))
+ int j = TYPE_FN_FIELDLIST_LENGTH (t, i);
+ struct fn_field *f = TYPE_FN_FIELDLIST1 (t, i);
+
+ if (intype == 0 && j > 1)
+ error ("non-unique member `%s' requires type instantiation", name);
+ if (intype)
{
- int j = TYPE_FN_FIELDLIST_LENGTH (t, i);
- struct fn_field *f = TYPE_FN_FIELDLIST1 (t, i);
-
- if (intype == 0 && j > 1)
- error ("non-unique member `%s' requires type instantiation", name);
- if (intype)
- {
- while (j--)
- if (TYPE_FN_FIELD_TYPE (f, j) == intype)
- break;
- if (j < 0)
- error ("no member function matches that type instantiation");
- }
- else
- j = 0;
-
- check_stub_method (t, i, j);
- if (TYPE_FN_FIELD_VIRTUAL_P (f, j))
+ while (j--)
+ if (TYPE_FN_FIELD_TYPE (f, j) == intype)
+ break;
+ if (j < 0)
+ error ("no member function matches that type instantiation");
+ }
+ else
+ j = 0;
+
+ if (TYPE_FN_FIELD_STUB (f, j))
+ check_stub_method (t, i, j);
+ if (TYPE_FN_FIELD_VIRTUAL_P (f, j))
+ {
+ return value_from_longest
+ (lookup_reference_type
+ (lookup_member_type (TYPE_FN_FIELD_TYPE (f, j),
+ domain)),
+ (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j));
+ }
+ else
+ {
+ struct symbol *s = lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j),
+ 0, VAR_NAMESPACE, 0, NULL);
+ if (s == NULL)
{
- return value_from_longest (
- lookup_pointer_type (
- lookup_member_type (TYPE_FN_FIELD_TYPE (f, j),
- baseclass)),
- (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j));
+ v = 0;
}
else
{
- struct symbol *s = lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j),
- 0, VAR_NAMESPACE, 0, NULL);
- v = locate_var_value (s, 0);
- VALUE_TYPE (v) = lookup_pointer_type (lookup_member_type (TYPE_FN_FIELD_TYPE (f, j), baseclass));
- return v;
+ v = read_var_value (s, 0);
+#if 0
+ VALUE_TYPE (v) = lookup_reference_type
+ (lookup_member_type (TYPE_FN_FIELD_TYPE (f, j),
+ domain));
+#endif
}
+ return v;
}
}
+ }
+ for (i = TYPE_N_BASECLASSES (t) - 1; i >= 0; i--)
+ {
+ value v;
+ int base_offset;
- if (TYPE_N_BASECLASSES (t) == 0)
- break;
-
- t = TYPE_BASECLASS (t, 0);
+ if (BASETYPE_VIA_VIRTUAL (t, i))
+ base_offset = 0;
+ else
+ base_offset = TYPE_BASECLASS_BITPOS (t, i) / 8;
+ v = value_struct_elt_for_reference (domain,
+ offset + base_offset,
+ TYPE_BASECLASS (t, i),
+ name,
+ intype);
+ if (v)
+ return v;
}
return 0;
}
projects / deliverable / binutils-gdb.git / blobdiff