/* Low level packing and unpacking of values for GDB, the GNU Debugger.
- Copyright 1986, 1987, 1989, 1991, 1993, 1994
+ Copyright 1986, 1987, 1989, 1991, 1993, 1994, 1995, 1996, 1997
Free Software Foundation, Inc.
This file is part of GDB.
#include "gdbcmd.h"
#include "target.h"
#include "language.h"
+#include "scm-lang.h"
#include "demangle.h"
/* Local function prototypes. */
static void show_convenience PARAMS ((char *, int));
+static int vb_match PARAMS ((struct type *, int, struct type *));
+
/* The value-history records all the values printed
by print commands during this session. Each chunk
records 60 consecutive values. The first chunk on
struct type *type;
{
register value_ptr val;
+ struct type *atype = check_typedef (type);
- check_stub_type (type);
-
- val = (struct value *) xmalloc (sizeof (struct value) + TYPE_LENGTH (type));
+ val = (struct value *) xmalloc (sizeof (struct value) + TYPE_LENGTH (atype));
VALUE_NEXT (val) = all_values;
all_values = val;
VALUE_TYPE (val) = type;
VALUE_OFFSET (val) = 0;
VALUE_BITPOS (val) = 0;
VALUE_BITSIZE (val) = 0;
- VALUE_REPEATED (val) = 0;
- VALUE_REPETITIONS (val) = 0;
VALUE_REGNO (val) = -1;
VALUE_LAZY (val) = 0;
VALUE_OPTIMIZED_OUT (val) = 0;
+ VALUE_BFD_SECTION (val) = NULL;
val->modifiable = 1;
return val;
}
struct type *type;
int count;
{
- register value_ptr val;
-
- val =
- (value_ptr) xmalloc (sizeof (struct value) + TYPE_LENGTH (type) * count);
- VALUE_NEXT (val) = all_values;
- all_values = val;
- VALUE_TYPE (val) = type;
- VALUE_LVAL (val) = not_lval;
- VALUE_ADDRESS (val) = 0;
- VALUE_FRAME (val) = 0;
- VALUE_OFFSET (val) = 0;
- VALUE_BITPOS (val) = 0;
- VALUE_BITSIZE (val) = 0;
- VALUE_REPEATED (val) = 1;
- VALUE_REPETITIONS (val) = count;
- VALUE_REGNO (val) = -1;
- VALUE_LAZY (val) = 0;
- VALUE_OPTIMIZED_OUT (val) = 0;
- return val;
+ int low_bound = current_language->string_lower_bound; /* ??? */
+ /* FIXME-type-allocation: need a way to free this type when we are
+ done with it. */
+ struct type *range_type
+ = create_range_type ((struct type *) NULL, builtin_type_int,
+ low_bound, count + low_bound - 1);
+ /* FIXME-type-allocation: need a way to free this type when we are
+ done with it. */
+ return allocate_value (create_array_type ((struct type *) NULL,
+ type, range_type));
}
/* Return a mark in the value chain. All values allocated after the
value_copy (arg)
value_ptr arg;
{
- register value_ptr val;
register struct type *type = VALUE_TYPE (arg);
- if (VALUE_REPEATED (arg))
- val = allocate_repeat_value (type, VALUE_REPETITIONS (arg));
- else
- val = allocate_value (type);
+ register value_ptr val = allocate_value (type);
VALUE_LVAL (val) = VALUE_LVAL (arg);
VALUE_ADDRESS (val) = VALUE_ADDRESS (arg);
VALUE_OFFSET (val) = VALUE_OFFSET (arg);
VALUE_BITPOS (val) = VALUE_BITPOS (arg);
VALUE_BITSIZE (val) = VALUE_BITSIZE (arg);
+ VALUE_FRAME (val) = VALUE_FRAME (arg);
VALUE_REGNO (val) = VALUE_REGNO (arg);
VALUE_LAZY (val) = VALUE_LAZY (arg);
+ VALUE_OPTIMIZED_OUT (val) = VALUE_OPTIMIZED_OUT (arg);
+ VALUE_BFD_SECTION (val) = VALUE_BFD_SECTION (arg);
val->modifiable = arg->modifiable;
if (!VALUE_LAZY (val))
{
memcpy (VALUE_CONTENTS_RAW (val), VALUE_CONTENTS_RAW (arg),
- TYPE_LENGTH (VALUE_TYPE (arg))
- * (VALUE_REPEATED (arg) ? VALUE_REPETITIONS (arg) : 1));
+ TYPE_LENGTH (VALUE_TYPE (arg)));
}
return val;
}
{
int i;
- /* Check error now if about to store an invalid float. We return -1
- to the caller, but allow them to continue, e.g. to print it as "Nan". */
- if (TYPE_CODE (VALUE_TYPE (val)) == TYPE_CODE_FLT)
- {
- unpack_double (VALUE_TYPE (val), VALUE_CONTENTS (val), &i);
- if (i) return -1; /* Indicate value not saved in history */
- }
-
/* We don't want this value to have anything to do with the inferior anymore.
In particular, "set $1 = 50" should not affect the variable from which
the value was taken, and fast watchpoints should be able to assume that
/* This coerces arrays and functions, which is necessary (e.g.
in disassemble_command). It also dereferences references, which
I suspect is the most logical thing to do. */
- if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_ENUM)
- COERCE_ARRAY (val);
+ COERCE_ARRAY (val);
return unpack_long (VALUE_TYPE (val), VALUE_CONTENTS (val));
}
-double
+DOUBLEST
value_as_double (val)
register value_ptr val;
{
- double foo;
+ DOUBLEST foo;
int inv;
foo = unpack_double (VALUE_TYPE (val), VALUE_CONTENTS (val), &inv);
register int len = TYPE_LENGTH (type);
register int nosign = TYPE_UNSIGNED (type);
+ if (current_language->la_language == language_scm
+ && is_scmvalue_type (type))
+ return scm_unpack (type, valaddr, TYPE_CODE_INT);
+
switch (code)
{
+ case TYPE_CODE_TYPEDEF:
+ return unpack_long (check_typedef (type), valaddr);
case TYPE_CODE_ENUM:
case TYPE_CODE_BOOL:
case TYPE_CODE_INT:
the returned double is OK to use. Argument is in target
format, result is in host format. */
-double
+DOUBLEST
unpack_double (type, valaddr, invp)
struct type *type;
char *valaddr;
register int nosign = TYPE_UNSIGNED (type);
*invp = 0; /* Assume valid. */
+ CHECK_TYPEDEF (type);
if (code == TYPE_CODE_FLT)
{
#ifdef INVALID_FLOAT
else if (nosign)
{
/* Unsigned -- be sure we compensate for signed LONGEST. */
- return (unsigned LONGEST) unpack_long (type, valaddr);
+#if !defined (_MSC_VER) || (_MSC_VER > 900)
+ return (ULONGEST) unpack_long (type, valaddr);
+#else
+ /* FIXME!!! msvc22 doesn't support unsigned __int64 -> double */
+ return (LONGEST) unpack_long (type, valaddr);
+#endif /* _MSC_VER */
}
else
{
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;
+{
+ CORE_ADDR addr;
+ asection *sect;
+ if (TYPE_FIELD_STATIC_HAS_ADDR (type, fieldno))
+ {
+ addr = TYPE_FIELD_STATIC_PHYSADDR (type, fieldno);
+ sect = NULL;
+ }
+ else
+ {
+ char *phys_name = TYPE_FIELD_STATIC_PHYSNAME (type, fieldno);
+ struct symbol *sym = lookup_symbol (phys_name, 0, VAR_NAMESPACE, 0, NULL);
+ if (sym == NULL)
+ return NULL;
+ addr = SYMBOL_VALUE_ADDRESS (sym);
+ sect = SYMBOL_BFD_SECTION (sym);
+ SET_FIELD_PHYSADDR (TYPE_FIELD (type, fieldno), addr);
+ }
+ return value_at (TYPE_FIELD_TYPE (type, fieldno), addr, sect);
+}
+
/* Given a value ARG1 (offset by OFFSET bytes)
of a struct or union type ARG_TYPE,
- extract and return the value of one of its fields.
- FIELDNO says which field.
-
- For C++, must also be able to return values from static fields */
+ extract and return the value of one of its (non-static) fields.
+ FIELDNO says which field. */
value_ptr
value_primitive_field (arg1, offset, fieldno, arg_type)
register value_ptr v;
register struct type *type;
- check_stub_type (arg_type);
+ CHECK_TYPEDEF (arg_type);
type = TYPE_FIELD_TYPE (arg_type, fieldno);
/* Handle packed fields */
- offset += TYPE_FIELD_BITPOS (arg_type, fieldno) / 8;
if (TYPE_FIELD_BITSIZE (arg_type, fieldno))
{
v = value_from_longest (type,
- unpack_field_as_long (arg_type,
- VALUE_CONTENTS (arg1),
- fieldno));
+ unpack_field_as_long (arg_type,
+ VALUE_CONTENTS (arg1)
+ + offset,
+ fieldno));
VALUE_BITPOS (v) = TYPE_FIELD_BITPOS (arg_type, fieldno) % 8;
VALUE_BITSIZE (v) = TYPE_FIELD_BITSIZE (arg_type, fieldno);
}
if (VALUE_LAZY (arg1))
VALUE_LAZY (v) = 1;
else
- memcpy (VALUE_CONTENTS_RAW (v), VALUE_CONTENTS_RAW (arg1) + offset,
+ memcpy (VALUE_CONTENTS_RAW (v),
+ VALUE_CONTENTS_RAW (arg1) + offset
+ + TYPE_FIELD_BITPOS (arg_type, fieldno) / 8,
TYPE_LENGTH (type));
}
VALUE_LVAL (v) = VALUE_LVAL (arg1);
if (VALUE_LVAL (arg1) == lval_internalvar)
VALUE_LVAL (v) = lval_internalvar_component;
VALUE_ADDRESS (v) = VALUE_ADDRESS (arg1);
- VALUE_OFFSET (v) = offset + VALUE_OFFSET (arg1);
+ VALUE_OFFSET (v) = VALUE_OFFSET (arg1) + offset
+ + TYPE_FIELD_BITPOS (arg_type, fieldno) / 8;
return v;
}
/* Given a value ARG1 of a struct or union type,
- extract and return the value of one of its fields.
- FIELDNO says which field.
-
- For C++, must also be able to return values from static fields */
+ extract and return the value of one of its (non-static) fields.
+ FIELDNO says which field. */
value_ptr
value_field (arg1, fieldno)
int offset;
{
value_ptr arg1 = *arg1p;
+ struct type *type1 = check_typedef (VALUE_TYPE (arg1));
+ struct type *entry_type;
/* First, get the virtual function table pointer. That comes
with a strange type, so cast it to type `pointer to long' (which
should serve just fine as a function type). Then, index into
fcontext = TYPE_VPTR_BASETYPE (type);
context = lookup_pointer_type (fcontext);
/* Now context is a pointer to the basetype containing the vtbl. */
- if (TYPE_TARGET_TYPE (context) != VALUE_TYPE (arg1))
- arg1 = value_ind (value_cast (context, value_addr (arg1)));
+ if (TYPE_TARGET_TYPE (context) != type1)
+ {
+ arg1 = value_ind (value_cast (context, value_addr (arg1)));
+ type1 = check_typedef (VALUE_TYPE (arg1));
+ }
- context = VALUE_TYPE (arg1);
+ context = type1;
/* Now context is the basetype containing the vtbl. */
/* This type may have been defined before its virtual function table
time, e.g. if the user has set a conditional breakpoint calling
a virtual function. */
entry = value_subscript (vtbl, vi);
+ entry_type = check_typedef (VALUE_TYPE (entry));
- if (TYPE_CODE (VALUE_TYPE (entry)) == TYPE_CODE_STRUCT)
+ if (TYPE_CODE (entry_type) == TYPE_CODE_STRUCT)
{
/* Move the `this' pointer according to the virtual function table. */
VALUE_OFFSET (arg1) += value_as_long (value_field (entry, 0));
vfn = value_field (entry, 2);
}
- else if (TYPE_CODE (VALUE_TYPE (entry)) == TYPE_CODE_PTR)
+ else if (TYPE_CODE (entry_type) == TYPE_CODE_PTR)
vfn = entry;
else
error ("I'm confused: virtual function table has bad type");
struct minimal_symbol *msymbol;
btype = TYPE_VPTR_BASETYPE (dtype);
- check_stub_type (btype);
+ CHECK_TYPEDEF (btype);
arg = in_arg;
if (btype != dtype)
arg = value_cast (lookup_pointer_type (btype), arg);
entry = value_subscript (vtbl, value_from_longest (builtin_type_int,
(LONGEST) i));
/* This won't work if we're using thunks. */
- if (TYPE_CODE (VALUE_TYPE (entry)) != TYPE_CODE_STRUCT)
+ 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
/* Take care of preliminaries. */
if (TYPE_VPTR_FIELDNO (type) < 0)
fill_in_vptr_fieldno (type);
- if (TYPE_VPTR_FIELDNO (type) < 0 || VALUE_REPEATED (arg))
+ if (TYPE_VPTR_FIELDNO (type) < 0)
return 0;
return value_headof (arg, 0, type);
if (*name != '_')
return 0;
/* gcc 2.4 uses _vb$. */
- if (name[1] == 'v' && name[2] == 'b' && name[3] == CPLUS_MARKER)
+ if (name[1] == 'v' && name[2] == 'b' && is_cplus_marker (name[3]))
field_class_name = name + 4;
/* gcc 2.5 will use __vb_. */
if (name[1] == '_' && name[2] == 'v' && name[3] == 'b' && name[4] == '_')
}
/* Compute the offset of the baseclass which is
- the INDEXth baseclass of class TYPE, for a value ARG,
- wih extra offset of OFFSET.
- The result is the offste of the baseclass value relative
+ the INDEXth baseclass of class TYPE,
+ for value at VALADDR (in host) at ADDRESS (in target).
+ The result is the offset of the baseclass value relative
to (the address of)(ARG) + OFFSET.
-1 is returned on error. */
int
-baseclass_offset (type, index, arg, offset)
+baseclass_offset (type, index, valaddr, address)
struct type *type;
int index;
- value_ptr arg;
- int offset;
+ char *valaddr;
+ CORE_ADDR address;
{
struct type *basetype = TYPE_BASECLASS (type, index);
{
CORE_ADDR addr
= unpack_pointer (TYPE_FIELD_TYPE (type, i),
- VALUE_CONTENTS (arg) + VALUE_OFFSET (arg)
- + offset
- + (TYPE_FIELD_BITPOS (type, i) / 8));
-
- if (VALUE_LVAL (arg) != lval_memory)
- return -1;
+ valaddr + (TYPE_FIELD_BITPOS (type, i) / 8));
- return addr -
- (LONGEST) (VALUE_ADDRESS (arg) + VALUE_OFFSET (arg) + offset);
+ return addr - (LONGEST) address;
}
}
/* Not in the fields, so try looking through the baseclasses. */
for (i = index+1; i < n_baseclasses; i++)
{
int boffset =
- baseclass_offset (type, i, arg, offset);
+ baseclass_offset (type, i, valaddr, address);
if (boffset)
return boffset;
}
/* Baseclass is easily computed. */
return TYPE_BASECLASS_BITPOS (type, index) / 8;
}
-
-/* Compute the address of the baseclass which is
- the INDEXth baseclass of class TYPE. The TYPE base
- of the object is at VALADDR.
-
- If ERRP is non-NULL, set *ERRP to be the errno code of any error,
- or 0 if no error. In that case the return value is not the address
- of the baseclasss, but the address which could not be read
- successfully. */
-
-/* FIXME Fix remaining uses of baseclass_addr to use baseclass_offset */
-
-char *
-baseclass_addr (type, index, valaddr, valuep, errp)
- struct type *type;
- int index;
- char *valaddr;
- value_ptr *valuep;
- int *errp;
-{
- struct type *basetype = TYPE_BASECLASS (type, index);
-
- if (errp)
- *errp = 0;
-
- if (BASETYPE_VIA_VIRTUAL (type, index))
- {
- /* Must hunt for the pointer to this virtual baseclass. */
- register int i, len = TYPE_NFIELDS (type);
- register int n_baseclasses = TYPE_N_BASECLASSES (type);
-
- /* First look for the virtual baseclass pointer
- in the fields. */
- for (i = n_baseclasses; i < len; i++)
- {
- if (vb_match (type, i, basetype))
- {
- value_ptr val = allocate_value (basetype);
- CORE_ADDR addr;
- int status;
-
- addr
- = unpack_pointer (TYPE_FIELD_TYPE (type, i),
- valaddr + (TYPE_FIELD_BITPOS (type, i) / 8));
-
- status = target_read_memory (addr,
- VALUE_CONTENTS_RAW (val),
- TYPE_LENGTH (basetype));
- VALUE_LVAL (val) = lval_memory;
- VALUE_ADDRESS (val) = addr;
-
- if (status != 0)
- {
- if (valuep)
- *valuep = NULL;
- release_value (val);
- value_free (val);
- if (errp)
- *errp = status;
- return (char *)addr;
- }
- else
- {
- if (valuep)
- *valuep = val;
- return (char *) VALUE_CONTENTS (val);
- }
- }
- }
- /* Not in the fields, so try looking through the baseclasses. */
- for (i = index+1; i < n_baseclasses; i++)
- {
- char *baddr;
-
- baddr = baseclass_addr (type, i, valaddr, valuep, errp);
- if (baddr)
- return baddr;
- }
- /* Not found. */
- if (valuep)
- *valuep = 0;
- return 0;
- }
-
- /* Baseclass is easily computed. */
- if (valuep)
- *valuep = 0;
- return valaddr + TYPE_BASECLASS_BITPOS (type, index) / 8;
-}
\f
/* Unpack a field FIELDNO of the specified TYPE, from the anonymous object at
VALADDR.
char *valaddr;
int fieldno;
{
- unsigned LONGEST val;
- unsigned LONGEST valmask;
+ ULONGEST val;
+ ULONGEST valmask;
int bitpos = TYPE_FIELD_BITPOS (type, fieldno);
int bitsize = TYPE_FIELD_BITSIZE (type, fieldno);
int lsbcount;
/* If the field does not entirely fill a LONGEST, then zero the sign bits.
If the field is signed, and is negative, then sign extend. */
- if ((bitsize > 0) && (bitsize < 8 * sizeof (val)))
+ if ((bitsize > 0) && (bitsize < 8 * (int) sizeof (val)))
{
- valmask = (((unsigned LONGEST) 1) << bitsize) - 1;
+ valmask = (((ULONGEST) 1) << bitsize) - 1;
val &= valmask;
if (!TYPE_UNSIGNED (TYPE_FIELD_TYPE (type, fieldno)))
{
{
LONGEST oword;
- /* Reject values too big to fit in the field in question,
- otherwise adjoining fields may be corrupted. */
- if (bitsize < (8 * sizeof (fieldval))
+ /* If a negative fieldval fits in the field in question, chop
+ off the sign extension bits. */
+ if (bitsize < (8 * (int) sizeof (fieldval))
+ && (~fieldval & ~((1 << (bitsize - 1)) - 1)) == 0)
+ fieldval = fieldval & ((1 << bitsize) - 1);
+
+ /* Warn if value is too big to fit in the field in question. */
+ if (bitsize < (8 * (int) sizeof (fieldval))
&& 0 != (fieldval & ~((1<<bitsize)-1)))
{
/* FIXME: would like to include fieldval in the message, but
we don't have a sprintf_longest. */
- error ("Value does not fit in %d bits.", bitsize);
+ warning ("Value does not fit in %d bits.", bitsize);
+
+ /* Truncate it, otherwise adjoining fields may be corrupted. */
+ fieldval = fieldval & ((1 << bitsize) - 1);
}
oword = extract_signed_integer (addr, sizeof oword);
bitpos = sizeof (oword) * 8 - bitpos - bitsize;
/* Mask out old value, while avoiding shifts >= size of oword */
- if (bitsize < 8 * sizeof (oword))
- oword &= ~(((((unsigned LONGEST)1) << bitsize) - 1) << bitpos);
+ if (bitsize < 8 * (int) sizeof (oword))
+ oword &= ~(((((ULONGEST)1) << bitsize) - 1) << bitpos);
else
- oword &= ~((~(unsigned LONGEST)0) << bitpos);
+ oword &= ~((~(ULONGEST)0) << bitpos);
oword |= fieldval << bitpos;
store_signed_integer (addr, sizeof oword, oword);
register LONGEST num;
{
register value_ptr val = allocate_value (type);
- register enum type_code code = TYPE_CODE (type);
- register int len = TYPE_LENGTH (type);
+ register enum type_code code;
+ register int len;
+ retry:
+ code = TYPE_CODE (type);
+ len = TYPE_LENGTH (type);
switch (code)
{
+ case TYPE_CODE_TYPEDEF:
+ type = check_typedef (type);
+ goto retry;
case TYPE_CODE_INT:
case TYPE_CODE_CHAR:
case TYPE_CODE_ENUM:
have the same form. */
store_address (VALUE_CONTENTS_RAW (val), len, (CORE_ADDR) num);
break;
-
+
default:
error ("Unexpected type encountered for integer constant.");
}
value_ptr
value_from_double (type, num)
struct type *type;
- double num;
+ DOUBLEST num;
{
register value_ptr val = allocate_value (type);
- register enum type_code code = TYPE_CODE (type);
- register int len = TYPE_LENGTH (type);
+ struct type *base_type = check_typedef (type);
+ register enum type_code code = TYPE_CODE (base_type);
+ register int len = TYPE_LENGTH (base_type);
if (code == TYPE_CODE_FLT)
{
addr = EXTRACT_STRUCT_VALUE_ADDRESS (retbuf);
if (!addr)
error ("Function return value unknown");
- return value_at (valtype, addr);
+ return value_at (valtype, addr, NULL);
}
#endif
val = allocate_value (valtype);
+ CHECK_TYPEDEF (valtype);
EXTRACT_RETURN_VALUE (valtype, retbuf, VALUE_CONTENTS_RAW (val));
return val;
))
#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
the value returning convention. FUNCTION is the value representing
if (code == TYPE_CODE_ERROR)
error ("Function return type unknown.");
- if (code == TYPE_CODE_STRUCT ||
- code == TYPE_CODE_UNION ||
- code == TYPE_CODE_ARRAY)
+ if (code == TYPE_CODE_STRUCT
+ || code == TYPE_CODE_UNION
+ || code == TYPE_CODE_ARRAY
+ || RETURN_VALUE_ON_STACK (value_type))
return USE_STRUCT_CONVENTION (gcc_p, value_type);
return 0;
set_return_value (val)
value_ptr val;
{
- register enum type_code code = TYPE_CODE (VALUE_TYPE (val));
+ struct type *type = check_typedef (VALUE_TYPE (val));
+ register enum type_code code = TYPE_CODE (type);
if (code == TYPE_CODE_ERROR)
error ("Function return type unknown.");
|| code == TYPE_CODE_UNION) /* FIXME, implement struct return. */
error ("GDB does not support specifying a struct or union return value.");
- STORE_RETURN_VALUE (VALUE_TYPE (val), VALUE_CONTENTS (val));
+ STORE_RETURN_VALUE (type, VALUE_CONTENTS (val));
}
\f
void
projects / deliverable / binutils-gdb.git / blobdiff