/* Perform non-arithmetic operations on values, for GDB.
- Copyright (C) 1986, 1987 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.
-
-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.
-
-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!
-*/
-#include "stdio.h"
+ Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+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.
+
+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.
+
+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. */
+
+#include <stdio.h>
#include "defs.h"
-#include "initialize.h"
#include "param.h"
#include "symtab.h"
#include "value.h"
+#include "frame.h"
+#include "inferior.h"
+#include "gdbcore.h"
+#include "target.h"
-START_FILE
+#include <errno.h>
+
+/* Local functions. */
+static value search_struct_field ();
\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,
and if ARG2 is an lvalue it can be cast into anything at all. */
+/* In C++, casts may change pointer representations. */
value
value_cast (type, arg2)
return value_from_double (type, value_as_double (arg2));
else if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_ENUM)
&& (scalar || code2 == TYPE_CODE_PTR))
- return value_from_long (type, value_as_long (arg2));
+ return value_from_longest (type, value_as_long (arg2));
else if (TYPE_LENGTH (type) == TYPE_LENGTH (VALUE_TYPE (arg2)))
{
+ if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR)
+ {
+ /* Look in the type of the source to see if it contains the
+ type of the target as a superclass. If so, we'll need to
+ 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
+ && TYPE_CODE (t2) == TYPE_CODE_STRUCT
+ && TYPE_NAME (t1) != 0) /* if name unknown, can't have supercl */
+ {
+ value v = search_struct_field (type_name_no_tag (t1),
+ value_ind (arg2), 0, t2, 1);
+ if (v)
+ {
+ v = value_addr (v);
+ VALUE_TYPE (v) = type;
+ return v;
+ }
+ }
+ /* No superclass found, just fall through to change ptr type. */
+ }
VALUE_TYPE (arg2) = type;
return arg2;
}
else if (VALUE_LVAL (arg2) == lval_memory)
{
- return value_at (type, VALUE_ADDRESS (arg2) + VALUE_OFFSET (arg2));
+ return value_at_lazy (type, VALUE_ADDRESS (arg2) + VALUE_OFFSET (arg2));
+ }
+ else if (code1 == TYPE_CODE_VOID)
+ {
+ return value_zero (builtin_type_void, not_lval);
}
else
- error ("Invalid cast.");
+ {
+ error ("Invalid cast.");
+ return 0;
+ }
+}
+
+/* Create a value of type TYPE that is zero, and return it. */
+
+value
+value_zero (type, lv)
+ struct type *type;
+ enum lval_type lv;
+{
+ register value val = allocate_value (type);
+
+ bzero (VALUE_CONTENTS (val), TYPE_LENGTH (type));
+ VALUE_LVAL (val) = lv;
+
+ return val;
}
-/* Return the value with a specified type located at specified address. */
+/* Return a value with type TYPE located at ADDR.
+
+ Call value_at only if the data needs to be fetched immediately;
+ if we can be 'lazy' and defer the fetch, perhaps indefinately, call
+ value_at_lazy instead. value_at_lazy simply records the address of
+ the data and sets the lazy-evaluation-required flag. The lazy flag
+ is tested in the VALUE_CONTENTS macro, which is used if and when
+ the contents are actually required. */
value
value_at (type, addr)
{
register value val = allocate_value (type);
- read_memory (addr, VALUE_CONTENTS (val), TYPE_LENGTH (type));
+ read_memory (addr, VALUE_CONTENTS_RAW (val), TYPE_LENGTH (type));
+
+ VALUE_LVAL (val) = lval_memory;
+ VALUE_ADDRESS (val) = addr;
+
+ return val;
+}
+
+/* Return a lazy value with type TYPE located at ADDR (cf. value_at). */
+
+value
+value_at_lazy (type, addr)
+ struct type *type;
+ CORE_ADDR addr;
+{
+ register value val = allocate_value (type);
+
VALUE_LVAL (val) = lval_memory;
VALUE_ADDRESS (val) = addr;
+ VALUE_LAZY (val) = 1;
return val;
}
+/* Called only from the VALUE_CONTENTS macro, if the current data for
+ a variable needs to be loaded into VALUE_CONTENTS(VAL). Fetches the
+ data from the user's process, and clears the lazy flag to indicate
+ that the data in the buffer is valid.
+
+ This function returns a value because it is used in the VALUE_CONTENTS
+ macro as part of an expression, where a void would not work. The
+ value is ignored. */
+
+int
+value_fetch_lazy (val)
+ register value val;
+{
+ CORE_ADDR addr = VALUE_ADDRESS (val) + VALUE_OFFSET (val);
+
+ read_memory (addr, VALUE_CONTENTS_RAW (val),
+ TYPE_LENGTH (VALUE_TYPE (val)));
+ VALUE_LAZY (val) = 0;
+ return 0;
+}
+
+
/* Store the contents of FROMVAL into the location of TOVAL.
Return a new value with the location of TOVAL and contents of FROMVAL. */
of program values to a special raw format,
convert FROMVAL's contents now, with result in `raw_buffer',
and set USE_BUFFER to the number of bytes to write. */
-
+
if (VALUE_REGNO (toval) >= 0
&& REGISTER_CONVERTIBLE (VALUE_REGNO (toval)))
{
fromval = value_cast (REGISTER_VIRTUAL_TYPE (regno), fromval);
bcopy (VALUE_CONTENTS (fromval), virtual_buffer,
REGISTER_VIRTUAL_SIZE (regno));
- REGISTER_CONVERT_TO_RAW (regno, virtual_buffer, raw_buffer);
+ target_convert_from_virtual (regno, virtual_buffer, raw_buffer);
use_buffer = REGISTER_RAW_SIZE (regno);
}
case lval_memory:
if (VALUE_BITSIZE (toval))
{
- int val;
+ int v; /* FIXME, this won't work for large bitfields */
read_memory (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
- &val, sizeof val);
- modify_field (&val, value_as_long (fromval),
+ &v, sizeof v);
+ modify_field (&v, (int) value_as_long (fromval),
VALUE_BITPOS (toval), VALUE_BITSIZE (toval));
write_memory (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
- &val, sizeof val);
+ (char *)&v, sizeof v);
}
else if (use_buffer)
write_memory (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
case lval_register:
if (VALUE_BITSIZE (toval))
{
- int val;
+ int v;
read_register_bytes (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
- &val, sizeof val);
- modify_field (&val, value_as_long (fromval),
+ &v, sizeof v);
+ modify_field (&v, (int) value_as_long (fromval),
VALUE_BITPOS (toval), VALUE_BITSIZE (toval));
write_register_bytes (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
- &val, sizeof val);
+ &v, sizeof v);
}
else if (use_buffer)
write_register_bytes (VALUE_ADDRESS (toval) + VALUE_OFFSET (toval),
VALUE_CONTENTS (fromval), TYPE_LENGTH (type));
break;
+ case lval_reg_frame_relative:
+ {
+ /* value is stored in a series of registers in the frame
+ specified by the structure. Copy that value out, modify
+ it, and copy it back in. */
+ int amount_to_copy = (VALUE_BITSIZE (toval) ? 1 : TYPE_LENGTH (type));
+ int reg_size = REGISTER_RAW_SIZE (VALUE_FRAME_REGNUM (toval));
+ int byte_offset = VALUE_OFFSET (toval) % reg_size;
+ int reg_offset = VALUE_OFFSET (toval) / reg_size;
+ int amount_copied;
+ char *buffer = (char *) alloca (amount_to_copy);
+ int regno;
+ FRAME frame;
+
+ /* Figure out which frame this is in currently. */
+ for (frame = get_current_frame ();
+ frame && FRAME_FP (frame) != VALUE_FRAME (toval);
+ frame = get_prev_frame (frame))
+ ;
+
+ if (!frame)
+ error ("Value being assigned to is no longer active.");
+
+ amount_to_copy += (reg_size - amount_to_copy % reg_size);
+
+ /* Copy it out. */
+ for ((regno = VALUE_FRAME_REGNUM (toval) + reg_offset,
+ amount_copied = 0);
+ amount_copied < amount_to_copy;
+ amount_copied += reg_size, regno++)
+ {
+ get_saved_register (buffer + amount_copied,
+ (int *)NULL, (CORE_ADDR)NULL,
+ frame, regno, (enum lval_type *)NULL);
+ }
+
+ /* Modify what needs to be modified. */
+ if (VALUE_BITSIZE (toval))
+ modify_field (buffer + byte_offset,
+ (int) value_as_long (fromval),
+ VALUE_BITPOS (toval), VALUE_BITSIZE (toval));
+ else if (use_buffer)
+ bcopy (raw_buffer, buffer + byte_offset, use_buffer);
+ else
+ bcopy (VALUE_CONTENTS (fromval), buffer + byte_offset,
+ TYPE_LENGTH (type));
+
+ /* Copy it back. */
+ for ((regno = VALUE_FRAME_REGNUM (toval) + reg_offset,
+ amount_copied = 0);
+ amount_copied < amount_to_copy;
+ amount_copied += reg_size, regno++)
+ {
+ enum lval_type lval;
+ CORE_ADDR addr;
+ int optim;
+
+ /* Just find out where to put it. */
+ get_saved_register ((char *)NULL,
+ &optim, &addr, frame, regno, &lval);
+
+ if (optim)
+ error ("Attempt to assign to a value that was optimized out.");
+ if (lval == lval_memory)
+ write_memory (addr, buffer + amount_copied, reg_size);
+ else if (lval == lval_register)
+ write_register_bytes (addr, buffer + amount_copied, reg_size);
+ else
+ error ("Attempt to assign to an unmodifiable value.");
+ }
+ }
+ break;
+
+
default:
error ("Left side of = operation is not an lvalue.");
}
- /* Return a value just like TOVAL except with the contents of FROMVAL. */
+ /* Return a value just like TOVAL except with the contents of FROMVAL
+ (except in the case of the type if TOVAL is an internalvar). */
- val = allocate_value (type);
- bcopy (toval, val, VALUE_CONTENTS (val) - (char *) val);
- bcopy (VALUE_CONTENTS (fromval), VALUE_CONTENTS (val), TYPE_LENGTH (type));
+ if (VALUE_LVAL (toval) == lval_internalvar
+ || VALUE_LVAL (toval) == lval_internalvar_component)
+ {
+ type = VALUE_TYPE (fromval);
+ }
+ val = allocate_value (type);
+ bcopy (toval, val, VALUE_CONTENTS_RAW (val) - (char *) val);
+ bcopy (VALUE_CONTENTS (fromval), VALUE_CONTENTS_RAW (val), TYPE_LENGTH (type));
+ VALUE_TYPE (val) = type;
+
return val;
}
val = allocate_repeat_value (VALUE_TYPE (arg1), count);
read_memory (VALUE_ADDRESS (arg1) + VALUE_OFFSET (arg1),
- VALUE_CONTENTS (val),
+ VALUE_CONTENTS_RAW (val),
TYPE_LENGTH (VALUE_TYPE (val)) * count);
VALUE_LVAL (val) = lval_memory;
VALUE_ADDRESS (val) = VALUE_ADDRESS (arg1) + VALUE_OFFSET (arg1);
value_of_variable (var)
struct symbol *var;
{
- return read_var_value (var, (CORE_ADDR) 0);
+ value val;
+
+ val = read_var_value (var, (FRAME) 0);
+ if (val == 0)
+ error ("Address of symbol \"%s\" is unknown.", SYMBOL_NAME (var));
+ return val;
}
/* Given a value which is an array, return a value which is
- a pointer to its first element. */
+ a pointer to its first (actually, zeroth) element.
+ FIXME, this should be subtracting the array's lower bound. */
value
value_coerce_array (arg1)
value arg1;
{
register struct type *type;
- register value val;
if (VALUE_LVAL (arg1) != lval_memory)
error ("Attempt to take address of value not located in memory.");
Its type is the type of the elements, not an array type. */
type = VALUE_TYPE (arg1);
- /* Get the type of the result. */
- type = lookup_pointer_type (type);
- val = value_from_long (builtin_type_long,
- VALUE_ADDRESS (arg1) + VALUE_OFFSET (arg1));
- VALUE_TYPE (val) = type;
- return val;
+ return value_from_longest (lookup_pointer_type (type),
+ (LONGEST) (VALUE_ADDRESS (arg1) + VALUE_OFFSET (arg1)));
}
+/* Given a value which is a function, return a value which is a pointer
+ to it. */
+
+value
+value_coerce_function (arg1)
+ value 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)),
+ (LONGEST) (VALUE_ADDRESS (arg1) + VALUE_OFFSET (arg1)));
+}
+
/* Return a pointer value for the object for which ARG1 is the contents. */
value
value_addr (arg1)
value arg1;
{
- register struct type *type;
- register value val, arg1_coerced;
- /* Taking the address of an array is really a no-op
- once the array is coerced to a pointer to its first element. */
- arg1_coerced = arg1;
- COERCE_ARRAY (arg1_coerced);
- if (arg1 != arg1_coerced)
- return arg1_coerced;
+ COERCE_REF(arg1);
+ if (VALUE_REPEATED (arg1)
+ || TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_ARRAY)
+ return value_coerce_array (arg1);
+ if (TYPE_CODE (VALUE_TYPE (arg1)) == 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.");
- /* Get the type of the result. */
- type = lookup_pointer_type (VALUE_TYPE (arg1));
- val = value_from_long (builtin_type_long,
- VALUE_ADDRESS (arg1) + VALUE_OFFSET (arg1));
- VALUE_TYPE (val) = type;
- return val;
+ return value_from_longest (lookup_pointer_type (VALUE_TYPE (arg1)),
+ (LONGEST) (VALUE_ADDRESS (arg1) + VALUE_OFFSET (arg1)));
}
/* Given a value of a pointer type, apply the C unary * operator to it. */
if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_MEMBER)
error ("not implemented: member types in value_ind");
- /* Allow * on an integer so we can cast it to whatever we want. */
+ /* Allow * on an integer so we can cast it to whatever we want.
+ This returns an int, which seems like the most C-like thing
+ to do. "long long" variables are rare enough that
+ BUILTIN_TYPE_LONGEST would seem to be a mistake. */
if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_INT)
- return value_at (builtin_type_long,
+ return value_at (builtin_type_int,
(CORE_ADDR) value_as_long (arg1));
else if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR)
- return value_at (TYPE_TARGET_TYPE (VALUE_TYPE (arg1)),
- (CORE_ADDR) value_as_long (arg1));
- else if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_REF)
- return value_at (TYPE_TARGET_TYPE (VALUE_TYPE (arg1)),
- (CORE_ADDR) value_as_long (arg1));
+ return value_at_lazy (TYPE_TARGET_TYPE (VALUE_TYPE (arg1)),
+ value_as_pointer (arg1));
error ("Attempt to take contents of a non-pointer value.");
+ return 0; /* For lint -- never reached */
}
\f
/* Pushing small parts of stack frames. */
{
register int len = sizeof (REGISTER_TYPE);
+ SWAP_TARGET_AND_HOST (&buffer, len);
#if 1 INNER_THAN 2
sp -= len;
- write_memory (sp, &buffer, len);
+ write_memory (sp, (char *)&buffer, len);
#else /* stack grows upward */
- write_memory (sp, &buffer, len);
+ write_memory (sp, (char *)&buffer, len);
sp += len;
#endif /* stack grows upward */
return value_push (sp, value_arg_coerce (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
+find_function_addr (function, retval_type)
+ value function;
+ struct type **retval_type;
+{
+ register struct type *ftype = VALUE_TYPE (function);
+ register enum type_code code = TYPE_CODE (ftype);
+ struct type *value_type;
+ CORE_ADDR funaddr;
+
+ /* If it's a member function, just look at the function
+ part of it. */
+
+ /* Determine address to call. */
+ if (code == TYPE_CODE_FUNC || code == TYPE_CODE_METHOD)
+ {
+ funaddr = VALUE_ADDRESS (function);
+ value_type = TYPE_TARGET_TYPE (ftype);
+ }
+ else if (code == TYPE_CODE_PTR)
+ {
+ funaddr = value_as_pointer (function);
+ if (TYPE_CODE (TYPE_TARGET_TYPE (ftype)) == TYPE_CODE_FUNC
+ || TYPE_CODE (TYPE_TARGET_TYPE (ftype)) == TYPE_CODE_METHOD)
+ value_type = TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (ftype));
+ else
+ value_type = builtin_type_int;
+ }
+ else if (code == TYPE_CODE_INT)
+ {
+ /* Handle the case of functions lacking debugging info.
+ Their values are characters since their addresses are char */
+ if (TYPE_LENGTH (ftype) == 1)
+ funaddr = value_as_pointer (value_addr (function));
+ else
+ /* Handle integer used as address of a function. */
+ funaddr = (CORE_ADDR) value_as_long (function);
+
+ value_type = builtin_type_int;
+ }
+ else
+ error ("Invalid data type for function to be called.");
+
+ *retval_type = value_type;
+ return funaddr;
+}
+
+#if defined (CALL_DUMMY)
+/* All this stuff with a dummy frame may seem unnecessarily complicated
+ (why not just save registers in GDB?). The purpose of pushing a dummy
+ frame which looks just like a real frame is so that if you call a
+ function and then hit a breakpoint (get a signal, etc), "backtrace"
+ will look right. Whether the backtrace needs to actually show the
+ stack at the time the inferior function was called is debatable, but
+ it certainly needs to not display garbage. So if you are contemplating
+ making dummy frames be different from normal frames, consider that. */
+
/* Perform a function call in the inferior.
ARGS is a vector of values of arguments (NARGS of them).
FUNCTION is a value, the function to be called.
during the execution of the function. */
value
-call_function (function, nargs, args)
+call_function_by_hand (function, nargs, args)
value function;
int nargs;
value *args;
register CORE_ADDR sp;
register int i;
CORE_ADDR start_sp;
+ /* CALL_DUMMY is an array of words (REGISTER_TYPE), but each word
+ in in host byte order. It is switched to target byte order before calling
+ FIX_CALL_DUMMY. */
static REGISTER_TYPE dummy[] = CALL_DUMMY;
REGISTER_TYPE dummy1[sizeof dummy / sizeof (REGISTER_TYPE)];
CORE_ADDR old_sp;
struct type *value_type;
-
+ unsigned char struct_return;
+ CORE_ADDR struct_addr;
+ struct inferior_status inf_status;
+ struct cleanup *old_chain;
+ CORE_ADDR funaddr;
+ int using_gcc;
+
+ save_inferior_status (&inf_status, 1);
+ old_chain = make_cleanup (restore_inferior_status, &inf_status);
+
+ /* PUSH_DUMMY_FRAME is responsible for saving the inferior registers
+ (and POP_FRAME for restoring them). (At least on most machines)
+ they are saved on the stack in the inferior. */
PUSH_DUMMY_FRAME;
+ old_sp = sp = read_register (SP_REGNUM);
+
+#if 1 INNER_THAN 2 /* Stack grows down */
+ sp -= sizeof dummy;
+ start_sp = sp;
+#else /* Stack grows up */
+ start_sp = sp;
+ sp += sizeof dummy;
+#endif
+
+ funaddr = find_function_addr (function, &value_type);
+
{
- register CORE_ADDR funaddr;
- register struct type *ftype = VALUE_TYPE (function);
- register enum type_code code = TYPE_CODE (ftype);
+ struct block *b = block_for_pc (funaddr);
+ /* If compiled without -g, assume GCC. */
+ using_gcc = b == NULL || BLOCK_GCC_COMPILED (b);
+ }
- /* If it's a member function, just look at the function
- part of it. */
- if (code == TYPE_CODE_MEMBER)
- {
- ftype = TYPE_TARGET_TYPE (ftype);
- code = TYPE_CODE (ftype);
- }
+ /* Are we returning a value using a structure return or a normal
+ value return? */
- /* Determine address to call. */
- if (code == TYPE_CODE_FUNC)
- {
- funaddr = VALUE_ADDRESS (function);
- value_type = TYPE_TARGET_TYPE (ftype);
- }
- else if (code == TYPE_CODE_PTR)
- {
- funaddr = value_as_long (function);
- if (TYPE_CODE (TYPE_TARGET_TYPE (ftype))
- == TYPE_CODE_FUNC)
- value_type = TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (ftype));
- else
- value_type = builtin_type_int;
- }
- else if (code == TYPE_CODE_INT)
- {
- /* Handle the case of functions lacking debugging info.
- Their values are characters since their addresses are char */
- if (TYPE_LENGTH (ftype) == 1)
- funaddr = value_as_long (value_addr (function));
- else
- /* Handle integer used as address of a function. */
- funaddr = value_as_long (function);
+ struct_return = using_struct_return (function, funaddr, value_type,
+ using_gcc);
- value_type = builtin_type_int;
- }
- else
- error ("Invalid data type for function to be called.");
+ /* Create a call sequence customized for this function
+ and the number of arguments for it. */
+ bcopy (dummy, dummy1, 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,
+ value_type, using_gcc);
+
+#if CALL_DUMMY_LOCATION == ON_STACK
+ write_memory (start_sp, (char *)dummy1, sizeof dummy);
- /* Create a call sequence customized for this function
- and the number of arguments for it. */
- bcopy (dummy, dummy1, sizeof dummy);
- FIX_CALL_DUMMY (dummy1, funaddr, nargs);
+#else /* Not on stack. */
+#if CALL_DUMMY_LOCATION == BEFORE_TEXT_END
+ /* Convex Unix prohibits executing in the stack segment. */
+ /* Hope there is empty room at the top of the text segment. */
+ {
+ static checked = 0;
+ if (!checked)
+ for (start_sp = text_end - sizeof dummy; start_sp < text_end; ++start_sp)
+ if (read_memory_integer (start_sp, 1) != 0)
+ error ("text segment full -- no place to put call");
+ checked = 1;
+ sp = old_sp;
+ start_sp = text_end - sizeof dummy;
+ write_memory (start_sp, (char *)dummy1, sizeof dummy);
+ }
+#else /* After text_end. */
+ {
+ int errcode;
+ sp = old_sp;
+ start_sp = text_end;
+ errcode = target_write_memory (start_sp, (char *)dummy1, sizeof dummy);
+ if (errcode != 0)
+ error ("Cannot write text segment -- call_function failed");
}
+#endif /* After text_end. */
+#endif /* Not on stack. */
- old_sp = sp = read_register (SP_REGNUM);
+#ifdef lint
+ sp = old_sp; /* It really is used, for some ifdef's... */
+#endif
-#if 1 INNER_THAN 2 /* Stack grows down */
- sp -= sizeof dummy;
- write_memory (sp, dummy1, sizeof dummy);
- start_sp = sp;
+#ifdef STACK_ALIGN
+ /* If stack grows down, we must leave a hole at the top. */
+ {
+ int len = 0;
+
+ /* Reserve space for the return structure to be written on the
+ stack, if necessary */
+
+ if (struct_return)
+ len += TYPE_LENGTH (value_type);
+
+ for (i = nargs - 1; i >= 0; i--)
+ len += TYPE_LENGTH (VALUE_TYPE (value_arg_coerce (args[i])));
+#ifdef CALL_DUMMY_STACK_ADJUST
+ len += CALL_DUMMY_STACK_ADJUST;
+#endif
+#if 1 INNER_THAN 2
+ sp -= STACK_ALIGN (len) - len;
+#else
+ sp += STACK_ALIGN (len) - len;
+#endif
+ }
+#endif /* STACK_ALIGN */
+
+ /* Reserve space for the return structure to be written on the
+ stack, if necessary */
+
+ if (struct_return)
+ {
+#if 1 INNER_THAN 2
+ sp -= TYPE_LENGTH (value_type);
+ struct_addr = sp;
+#else
+ struct_addr = sp;
+ sp += TYPE_LENGTH (value_type);
+#endif
+ }
+
+#if defined (REG_STRUCT_HAS_ADDR)
+ {
+ /* This is a machine like the sparc, where we need to pass a pointer
+ to the structure, not the structure itself. */
+ if (REG_STRUCT_HAS_ADDR (using_gcc))
+ for (i = nargs - 1; i >= 0; i--)
+ if (TYPE_CODE (VALUE_TYPE (args[i])) == TYPE_CODE_STRUCT)
+ {
+ CORE_ADDR addr;
+#if !(1 INNER_THAN 2)
+ /* The stack grows up, so the address of the thing we push
+ is the stack pointer before we push it. */
+ addr = sp;
+#endif
+ /* Push the structure. */
+ sp = value_push (sp, args[i]);
+#if 1 INNER_THAN 2
+ /* The stack grows down, so the address of the thing we push
+ is the stack pointer after we push it. */
+ addr = sp;
+#endif
+ /* The value we're going to pass is the address of the thing
+ we just pushed. */
+ args[i] = value_from_longest (lookup_pointer_type (value_type),
+ (LONGEST) addr);
+ }
+ }
+#endif /* REG_STRUCT_HAS_ADDR. */
+
+#ifdef PUSH_ARGUMENTS
+ PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr);
+#else /* !PUSH_ARGUMENTS */
for (i = nargs - 1; i >= 0; i--)
sp = value_arg_push (sp, args[i]);
-#else /* Stack grows up */
- start_sp = sp;
- write_memory (sp, dummy1, sizeof dummy);
- sp += sizeof dummy;
- for (i = 0; i < nargs; i++)
- sp = value_arg_push (sp, args[i]);
-#endif /* Stack grows up */
+#endif /* !PUSH_ARGUMENTS */
+
+#ifdef CALL_DUMMY_STACK_ADJUST
+#if 1 INNER_THAN 2
+ sp -= CALL_DUMMY_STACK_ADJUST;
+#else
+ sp += CALL_DUMMY_STACK_ADJUST;
+#endif
+#endif /* CALL_DUMMY_STACK_ADJUST */
+ /* Store the address at which the structure is supposed to be
+ written. Note that this (and the code which reserved the space
+ above) assumes that gcc was used to compile this function. Since
+ it doesn't cost us anything but space and if the function is pcc
+ it will ignore this value, we will make that assumption.
+
+ Also note that on some machines (like the sparc) pcc uses a
+ convention like gcc's. */
+
+ if (struct_return)
+ STORE_STRUCT_RETURN (struct_addr, sp);
+
+ /* Write the stack pointer. This is here because the statements above
+ might fool with it. On SPARC, this write also stores the register
+ window into the right place in the new stack frame, which otherwise
+ wouldn't happen. (See write_inferior_registers in sparc-xdep.c.) */
write_register (SP_REGNUM, sp);
/* Figure out the value returned by the function. */
after storing the contents of all regs into retbuf. */
run_stack_dummy (start_sp + CALL_DUMMY_START_OFFSET, retbuf);
- return value_being_returned (value_type, retbuf);
+ do_cleanups (old_chain);
+
+ return value_being_returned (value_type, retbuf, struct_return);
}
}
+#else /* no CALL_DUMMY. */
+value
+call_function_by_hand (function, nargs, args)
+ value function;
+ int nargs;
+ value *args;
+{
+ error ("Cannot invoke functions on this machine.");
+}
+#endif /* no CALL_DUMMY. */
\f
/* Create a value for a string constant:
Call the function malloc in the inferior to get space for it,
/* Find the address of malloc in the inferior. */
- sym = lookup_symbol ("malloc", 0, VAR_NAMESPACE);
+ sym = lookup_symbol ("malloc", 0, VAR_NAMESPACE, 0, NULL);
if (sym != 0)
{
if (SYMBOL_CLASS (sym) != LOC_BLOCK)
}
else
{
- register int i;
- for (i = 0; i < misc_function_count; i++)
- if (!strcmp (misc_function_vector[i].name, "malloc"))
- break;
- if (i < misc_function_count)
- val = value_from_long (builtin_type_long,
- misc_function_vector[i].address);
+ 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);
else
error ("String constants require the program to have a function \"malloc\".");
}
- blocklen = value_from_long (builtin_type_int, len + 1);
- val = call_function (val, 1, &blocklen);
+ blocklen = value_from_longest (builtin_type_int, (LONGEST) (len + 1));
+ val = target_call_function (val, 1, &blocklen);
if (value_zerop (val))
error ("No memory available for string constant.");
- write_memory (value_as_long (val), copy, len + 1);
+ write_memory (value_as_pointer (val), copy, len + 1);
VALUE_TYPE (val) = lookup_pointer_type (builtin_type_char);
return val;
}
\f
-/* Given ARG1, a value of type (pointer to a)* structure/union,
+/* 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.
+ If found, return value, else return NULL.
+
+ If LOOKING_FOR_BASECLASS, then instead of looking for struct fields,
+ look for a baseclass named NAME. */
+
+static value
+search_struct_field (name, arg1, offset, type, looking_for_baseclass)
+ char *name;
+ register value arg1;
+ int offset;
+ register struct type *type;
+ int looking_for_baseclass;
+{
+ int i;
+
+ check_stub_type (type);
+
+ if (! looking_for_baseclass)
+ for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
+ {
+ char *t_field_name = TYPE_FIELD_NAME (type, i);
+
+ 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));
+ if (v == 0)
+ error("there is no field named %s", name);
+ return v;
+ }
+ }
+
+ for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
+ {
+ value v;
+ /* If we are looking for baseclasses, this is what we get when we
+ hit them. */
+ int found_baseclass = (looking_for_baseclass
+ && !strcmp (name, TYPE_BASECLASS_NAME (type, i)));
+
+ 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");
+ if (found_baseclass)
+ 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)
+ v = value_primitive_field (arg1, offset, i, type);
+ else
+ v = search_struct_field (name, arg1,
+ offset + TYPE_BASECLASS_BITPOS (type, i) / 8,
+ TYPE_BASECLASS (type, i),
+ looking_for_baseclass);
+ if (v) return v;
+ }
+ return NULL;
+}
+
+/* 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.
+ If found, return value, else return NULL. */
+
+static value
+search_struct_method (name, arg1, args, offset, static_memfuncp, type)
+ char *name;
+ register value arg1, *args;
+ int offset, *static_memfuncp;
+ register struct type *type;
+{
+ int i;
+
+ check_stub_type (type);
+ for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--)
+ {
+ char *t_field_name = TYPE_FN_FIELDLIST_NAME (type, i);
+ if (t_field_name && !strcmp (t_field_name, name))
+ {
+ int j = TYPE_FN_FIELDLIST_LENGTH (type, i) - 1;
+ struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i);
+
+ if (j > 0 && args == 0)
+ error ("cannot resolve overloaded method `%s'", name);
+ while (j >= 0)
+ {
+ if (TYPE_FLAGS (TYPE_FN_FIELD_TYPE (f, j)) & TYPE_FLAG_STUB)
+ check_stub_method (type, i, j);
+ if (!typecmp (TYPE_FN_FIELD_STATIC_P (f, j),
+ TYPE_FN_FIELD_ARGS (f, j), args))
+ {
+ if (TYPE_FN_FIELD_VIRTUAL_P (f, j))
+ 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);
+ }
+ j--;
+ }
+ }
+ }
+
+ for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
+ {
+ value v;
+
+ 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;
+ }
+
+ v = search_struct_method (name, arg1, args,
+ TYPE_BASECLASS_BITPOS (type, i) / 8,
+ static_memfuncp, TYPE_BASECLASS (type, i));
+ if (v) return v;
+ }
+ return NULL;
+}
+
+/* Given *ARGP, a value of type (pointer to a)* structure/union,
extract the component named NAME from the ultimate target structure/union
and return it as a value with its appropriate type.
- ERR is used in the error message if ARG1's type is wrong.
+ ERR is used in the error message if *ARGP's type is wrong.
C++: ARGS is a list of argument types to aid in the selection of
an appropriate method. Also, handle derived types.
+ STATIC_MEMFUNCP, if non-NULL, points to a caller-supplied location
+ where the truthvalue of whether the function that was resolved was
+ a static member function or not is stored.
+
ERR is an error message to be printed in case the field is not found. */
-
+
value
-value_struct_elt (arg1, args, name, err)
- register value arg1, *args;
+value_struct_elt (argp, args, name, static_memfuncp, err)
+ register value *argp, *args;
char *name;
+ int *static_memfuncp;
char *err;
{
register struct type *t;
- register int i;
- int found = 0;
-
- struct type *baseclass;
+ value v;
- COERCE_ARRAY (arg1);
+ COERCE_ARRAY (*argp);
- t = VALUE_TYPE (arg1);
+ t = VALUE_TYPE (*argp);
/* Follow pointers until we get to a non-pointer. */
while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_CODE (t) == TYPE_CODE_REF)
{
- arg1 = value_ind (arg1);
- COERCE_ARRAY (arg1);
- t = VALUE_TYPE (arg1);
+ *argp = value_ind (*argp);
+ /* Don't coerce fn pointer to fn and then back again! */
+ if (TYPE_CODE (VALUE_TYPE (*argp)) != TYPE_CODE_FUNC)
+ COERCE_ARRAY (*argp);
+ t = VALUE_TYPE (*argp);
}
if (TYPE_CODE (t) == TYPE_CODE_MEMBER)
&& TYPE_CODE (t) != TYPE_CODE_UNION)
error ("Attempt to extract a component of a value that is not a %s.", err);
- baseclass = t;
+ /* Assume it's not, unless we see that it is. */
+ if (static_memfuncp)
+ *static_memfuncp =0;
if (!args)
- {
- /* if there are no arguments ...do this... */
-
- /* Try as a variable first, because if we succeed, there
- is less work to be done. */
- while (t)
- {
- for (i = TYPE_NFIELDS (t) - 1; i >= 0; i--)
- {
- if (!strcmp (TYPE_FIELD_NAME (t, i), name))
- {
- found = 1;
- break;
- }
- }
-
- if (i >= 0)
- return TYPE_FIELD_STATIC (t, i)
- ? value_static_field (t, name, i) : value_field (arg1, i);
+ {
+ /* if there are no arguments ...do this... */
- t = TYPE_BASECLASS (t);
- VALUE_TYPE (arg1) = t; /* side effect! */
- }
+ /* Try as a field first, because if we succeed, there
+ is less work to be done. */
+ v = search_struct_field (name, *argp, 0, t, 0);
+ if (v)
+ return v;
/* C++: If it was not found as a data field, then try to
- return it as a pointer to a method. */
- t = baseclass;
- VALUE_TYPE (arg1) = t; /* side effect! */
+ return it as a pointer to a method. */
if (destructor_name_p (name, t))
- error ("use `info method' command to print out value of destructor");
+ error ("Cannot get value of destructor");
+
+ v = search_struct_method (name, *argp, args, 0, static_memfuncp, t);
- while (t)
+ if (v == 0)
{
- for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; --i)
- {
- if (! strcmp (TYPE_FN_FIELDLIST_NAME (t, i), name))
- {
- error ("use `info method' command to print value of method \"%s\"", name);
- }
- }
- t = TYPE_BASECLASS (t);
+ if (TYPE_NFN_FIELDS (t))
+ error ("There is no member or method named %s.", name);
+ else
+ error ("There is no member named %s.", name);
}
-
- if (found == 0)
- error("there is no field named %s", name);
- return 0;
+ return v;
}
if (destructor_name_p (name, t))
if (!args[1])
{
/* destructors are a special case. */
- return (value)value_fn_field (arg1, 0, TYPE_FN_FIELDLIST_LENGTH (t, 0));
+ return (value)value_fn_field (*argp, 0,
+ TYPE_FN_FIELDLIST_LENGTH (t, 0));
}
else
{
error ("destructor should not have any argument");
}
}
+ else
+ v = search_struct_method (name, *argp, args, 0, static_memfuncp, t);
- /* This following loop is for methods with arguments. */
- while (t)
- {
- /* Look up as method first, because that is where we
- expect to find it first. */
- for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; i--)
- {
- struct fn_field *f = TYPE_FN_FIELDLIST1 (t, i);
-
- if (!strcmp (TYPE_FN_FIELDLIST_NAME (t, i), name))
- {
- int j;
- struct fn_field *f = TYPE_FN_FIELDLIST1 (t, i);
-
- found = 1;
- for (j = TYPE_FN_FIELDLIST_LENGTH (t, i) - 1; j >= 0; --j)
- {
- if (!typecmp (TYPE_FN_FIELD_ARGS (f, j), args))
- {
- if (TYPE_FN_FIELD_VIRTUAL_P (f, j))
- {
- /* 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 the table, and convert
- final value to appropriate function type. */
- value vfn, vtbl;
- value vi = value_from_long (builtin_type_int,
- TYPE_FN_FIELD_VOFFSET (f, j));
- VALUE_TYPE (arg1) = TYPE_VPTR_BASETYPE (t);
-
- if (TYPE_VPTR_FIELDNO (t) < 0)
- TYPE_VPTR_FIELDNO (t)
- = fill_in_vptr_fieldno (t);
-
- vtbl = value_field (arg1, TYPE_VPTR_FIELDNO (t));
- vfn = value_subscript (vtbl, vi);
- VALUE_TYPE (vfn) = lookup_pointer_type (TYPE_FN_FIELD_TYPE (f, j));
- return vfn;
- }
- else
- return (value)value_fn_field (arg1, i, j);
- }
- }
- }
- }
- t = TYPE_BASECLASS (t);
- VALUE_TYPE (arg1) = t; /* side effect! */
- }
-
- if (found)
+ if (v == 0)
{
- error ("Structure method %s not defined for arglist.", name);
- return 0;
+ /* See if user tried to invoke data as function. If so,
+ hand it back. If it's not callable (i.e., a pointer to function),
+ gdb should give an error. */
+ v = search_struct_field (name, *argp, 0, t, 0);
}
- else
- {
- /* See if user tried to invoke data as function */
- t = baseclass;
- while (t)
- {
- for (i = TYPE_NFIELDS (t) - 1; i >= 0; i--)
- {
- if (!strcmp (TYPE_FIELD_NAME (t, i), name))
- {
- found = 1;
- break;
- }
- }
-
- if (i >= 0)
- return TYPE_FIELD_STATIC (t, i)
- ? value_static_field (t, name, i) : value_field (arg1, i);
- t = TYPE_BASECLASS (t);
- VALUE_TYPE (arg1) = t; /* side effect! */
- }
- error ("Structure has no component named %s.", name);
- }
+ if (!v)
+ error ("Structure has no component named %s.", name);
+ return v;
}
/* C++: return 1 is NAME is a legitimate name for the destructor
struct type *type;
{
/* destructors are a special case. */
- char *dname = TYPE_NAME (type);
if (name[0] == '~')
{
+ char *dname = type_name_no_tag (type);
+
if (! TYPE_HAS_DESTRUCTOR (type))
- error ("type `%s' does not have destructor defined",
- TYPE_NAME (type));
- /* Skip past the "struct " at the front. */
- while (*dname++ != ' ') ;
+ error ("type `%s' does not have destructor defined", dname);
if (strcmp (dname, name+1))
- error ("destructor specification error");
+ error ("name of destructor must equal name of class");
else
return 1;
}
return 0;
}
+/* Helper function for check_field: Given TYPE, a structure/union,
+ return 1 if the component named NAME from the ultimate
+ target structure/union is defined, otherwise, return 0. */
+
+static int
+check_field_in (type, name)
+ register struct type *type;
+ char *name;
+{
+ register int i;
+
+ for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
+ {
+ char *t_field_name = TYPE_FIELD_NAME (type, i);
+ if (t_field_name && !strcmp (t_field_name, name))
+ return 1;
+ }
+
+ /* C++: If it was not found as a data field, then try to
+ return it as a pointer to a method. */
+
+ /* Destructors are a special case. */
+ if (destructor_name_p (name, type))
+ return 1;
+
+ for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
+ {
+ if (!strcmp (TYPE_FN_FIELDLIST_NAME (type, i), name))
+ return 1;
+ }
+
+ for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
+ if (check_field_in (TYPE_BASECLASS (type, i), name))
+ return 1;
+
+ return 0;
+}
+
+
/* C++: Given ARG1, a value of type (pointer to a)* structure/union,
return 1 if the component named NAME from the ultimate
target structure/union is defined, otherwise, return 0. */
-
+
int
check_field (arg1, name)
register value arg1;
char *name;
{
register struct type *t;
- register int i;
- int found = 0;
-
- struct type *baseclass;
COERCE_ARRAY (arg1);
/* Follow pointers until we get to a non-pointer. */
while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_CODE (t) == TYPE_CODE_REF)
- {
- arg1 = value_ind (arg1);
- COERCE_ARRAY (arg1);
- t = VALUE_TYPE (arg1);
- }
+ t = TYPE_TARGET_TYPE (t);
if (TYPE_CODE (t) == TYPE_CODE_MEMBER)
error ("not implemented: member type in check_field");
&& TYPE_CODE (t) != TYPE_CODE_UNION)
error ("Internal error: `this' is not an aggregate");
- baseclass = t;
-
- while (t)
- {
- for (i = TYPE_NFIELDS (t) - 1; i >= 0; i--)
- {
- if (!strcmp (TYPE_FIELD_NAME (t, i), name))
- {
- return 1;
- }
- }
- t = TYPE_BASECLASS (t);
- VALUE_TYPE (arg1) = t; /* side effect! */
- }
-
- /* C++: If it was not found as a data field, then try to
- return it as a pointer to a method. */
- t = baseclass;
- VALUE_TYPE (arg1) = t; /* side effect! */
-
- /* Destructors are a special case. */
- if (destructor_name_p (name, t))
- return 1;
-
- while (t)
- {
- for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; --i)
- {
- if (!strcmp (TYPE_FN_FIELDLIST_NAME (t, i), name))
- return 1;
- }
- t = TYPE_BASECLASS (t);
- }
- return 0;
+ return check_field_in (t, name);
}
/* C++: Given an aggregate type DOMAIN, and a member name NAME,
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. */
-
+
value
value_struct_elt_for_address (domain, intype, name)
struct type *domain, *intype;
{
register struct type *t = domain;
register int i;
- int found = 0;
value v;
struct type *baseclass;
while (t)
{
- for (i = TYPE_NFIELDS (t) - 1; i >= 0; i--)
+ for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); i--)
{
- if (!strcmp (TYPE_FIELD_NAME (t, i), 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))
+ {
+ 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");
- v = value_from_long (builtin_type_int, TYPE_FIELD_BITPOS (t, i) >> 3);
- VALUE_TYPE (v) = lookup_member_type (TYPE_FIELD_TYPE (t, i), baseclass);
- return v;
+ return value_from_longest (
+ lookup_pointer_type (
+ lookup_member_type (TYPE_FIELD_TYPE (t, i), baseclass)),
+ (LONGEST) (TYPE_FIELD_BITPOS (t, i) >> 3));
}
}
- t = TYPE_BASECLASS (t);
+
+ 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. */
+ return it as a pointer to a method. */
t = baseclass;
/* Destructors are a special case. */
error ("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)
else
j = 0;
+ check_stub_method (t, i, j);
if (TYPE_FN_FIELD_VIRTUAL_P (f, j))
{
- v = value_from_long (builtin_type_long,
- TYPE_FN_FIELD_VOFFSET (f, j));
+ return value_from_longest (
+ lookup_pointer_type (
+ lookup_member_type (TYPE_FN_FIELD_TYPE (f, j),
+ baseclass)),
+ (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j));
}
else
{
struct symbol *s = lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j),
- 0, VAR_NAMESPACE);
+ 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;
}
- VALUE_TYPE (v) = lookup_member_type (TYPE_FN_FIELD_TYPE (f, j), baseclass);
- return v;
}
}
- t = TYPE_BASECLASS (t);
+
+ if (TYPE_N_BASECLASSES (t) == 0)
+ break;
+
+ t = TYPE_BASECLASS (t, 0);
}
return 0;
}
/* Compare two argument lists and return the position in which they differ,
- or zero if equal. Note that we ignore the first argument, which is
- the type of the instance variable. This is because we want to handle
- derived classes. This is not entirely correct: we should actually
- check to make sure that a requested operation is type secure,
- shouldn't we? */
-int typecmp(t1, t2)
+ or zero if equal.
+
+ STATICP is nonzero if the T1 argument list came from a
+ static member function.
+
+ For non-static member functions, we ignore the first argument,
+ which is the type of the instance variable. This is because we want
+ to handle calls with objects from derived classes. This is not
+ entirely correct: we should actually check to make sure that a
+ requested operation is type secure, shouldn't we? FIXME. */
+
+int
+typecmp (staticp, t1, t2)
+ int staticp;
struct type *t1[];
value t2[];
{
int i;
-
+
+ if (t2 == 0)
+ return 1;
+ if (staticp && t1 == 0)
+ return t2[1] != 0;
+ if (t1 == 0)
+ return 1;
if (t1[0]->code == TYPE_CODE_VOID) return 0;
- if (!t1[1])return 0;
- for (i = 1; t1[i]->code != TYPE_CODE_VOID; i++)
+ if (t1[!staticp] == 0) return 0;
+ for (i = !staticp; t1[i] && t1[i]->code != TYPE_CODE_VOID; i++)
{
if (! t2[i]
|| t1[i]->code != t2[i]->type->code
- || t1[i]->target_type != t2[i]->type->target_type)
- {
- return i+1;
- }
+/* Too pessimistic: || t1[i]->target_type != t2[i]->type->target_type */
+ )
+ return i+1;
}
+ if (!t1[i]) return 0;
return t2[i] ? i+1 : 0;
}
-#ifndef FRAME
-#include "frame.h"
-#endif
-
/* C++: return the value of the class instance variable, if one exists.
Flag COMPLAIN signals an error if the request is made in an
inappropriate context. */
{
extern FRAME selected_frame;
struct symbol *func, *sym;
- char *funname = 0;
struct block *b;
int i;
+ static const char funny_this[] = "this";
+ value this;
if (selected_frame == 0)
if (complain)
else return 0;
func = get_frame_function (selected_frame);
- if (func)
- funname = SYMBOL_NAME (func);
- else
- if (complain)
- error ("no `this' in nameless context");
- else return 0;
+ if (!func)
+ {
+ if (complain)
+ error ("no `this' in nameless context");
+ else return 0;
+ }
b = SYMBOL_BLOCK_VALUE (func);
i = BLOCK_NSYMS (b);
error ("no args, no `this'");
else return 0;
- sym = BLOCK_SYM (b, 0);
- if (strncmp ("$this", SYMBOL_NAME (sym), 5))
- if (complain)
- error ("current stack frame not in method");
- else return 0;
+ /* Calling lookup_block_symbol is necessary to get the LOC_REGISTER
+ symbol instead of the LOC_ARG one (if both exist). */
+ sym = lookup_block_symbol (b, funny_this, VAR_NAMESPACE);
+ if (sym == NULL)
+ {
+ if (complain)
+ error ("current stack frame not in method");
+ else
+ return NULL;
+ }
- return read_var_value (sym, selected_frame);
+ this = read_var_value (sym, selected_frame);
+ if (this == 0 && complain)
+ error ("`this' argument at unknown address");
+ return this;
}
-\f
-static
-initialize ()
-{ }
-
-END_FILE
projects / binutils.git / blobdiff