/* Find a variable's value in memory, for GDB, the GNU debugger.
- Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+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 "frame.h"
#include "value.h"
#include "gdbcore.h"
if (optimized != NULL)
*optimized = 0;
addr = find_saved_register (frame, regnum);
- if (addr != NULL)
+ if (addr != 0)
{
if (lval != NULL)
*lval = lval_memory;
int optim;
if (regnum == FP_REGNUM && selected_frame)
{
- bcopy (&FRAME_FP(selected_frame), myaddr, sizeof (CORE_ADDR));
- SWAP_TARGET_AND_HOST (myaddr, sizeof (CORE_ADDR)); /* in target order */
+ (void) memcpy (myaddr, &FRAME_FP(selected_frame),
+ REGISTER_RAW_SIZE(FP_REGNUM));
+ SWAP_TARGET_AND_HOST (myaddr, REGISTER_RAW_SIZE(FP_REGNUM)); /* in target order */
return 0;
}
- get_saved_register (myaddr, &optim, (CORE_ADDR) NULL, selected_frame,
+ get_saved_register (myaddr, &optim, (CORE_ADDR *) NULL, selected_frame,
regnum, (enum lval_type *)NULL);
return optim;
}
target_convert_to_virtual (regnum, raw_buffer, virtual_buffer);
val = allocate_value (REGISTER_VIRTUAL_TYPE (regnum));
- bcopy (virtual_buffer, VALUE_CONTENTS_RAW (val),
- REGISTER_VIRTUAL_SIZE (regnum));
+ (void) memcpy (VALUE_CONTENTS_RAW (val), virtual_buffer,
+ REGISTER_VIRTUAL_SIZE (regnum));
VALUE_LVAL (val) = lval;
VALUE_ADDRESS (val) = addr;
VALUE_REGNO (val) = regnum;
break;
}
if (myaddr != NULL)
- bcopy (®isters[regbyte], myaddr, len);
+ (void) memcpy (myaddr, ®isters[regbyte], len);
}
/* Read register REGNO into memory at MYADDR, which must be large enough
- for REGISTER_RAW_BYTES (REGNO). If the register is known to be the
- size of a CORE_ADDR or smaller, read_register can be used instead. */
+ for REGISTER_RAW_BYTES (REGNO). Target byte-order.
+ If the register is known to be the size of a CORE_ADDR or smaller,
+ read_register can be used instead. */
void
read_register_gen (regno, myaddr)
int regno;
{
if (!register_valid[regno])
target_fetch_registers (regno);
- bcopy (®isters[REGISTER_BYTE (regno)], myaddr, REGISTER_RAW_SIZE (regno));
+ (void) memcpy (myaddr, ®isters[REGISTER_BYTE (regno)],
+ REGISTER_RAW_SIZE (regno));
}
/* Copy LEN bytes of consecutive data from memory at MYADDR
{
/* Make sure the entire registers array is valid. */
read_register_bytes (0, (char *)NULL, REGISTER_BYTES);
- bcopy (myaddr, ®isters[regbyte], len);
+ (void) memcpy (®isters[regbyte], myaddr, len);
target_store_registers (-1);
}
/* Return the contents of register REGNO, regarding it as an integer. */
+/* FIXME, this loses when the REGISTER_VIRTUAL (REGNO) is true. Also,
+ why is the return type CORE_ADDR rather than some integer type? */
CORE_ADDR
read_register (regno)
int regno;
{
- int reg;
+ REGISTER_TYPE reg;
+
if (!register_valid[regno])
target_fetch_registers (regno);
- /* FIXME, this loses when REGISTER_RAW_SIZE (regno) != sizeof (int) */
- reg = *(int *) ®isters[REGISTER_BYTE (regno)];
- SWAP_TARGET_AND_HOST (®, sizeof (int));
+ memcpy (®, ®isters[REGISTER_BYTE (regno)], sizeof (REGISTER_TYPE));
+ SWAP_TARGET_AND_HOST (®, sizeof (REGISTER_TYPE));
return reg;
}
#endif
/* Store VALUE in the register number REGNO, regarded as an integer. */
+/* FIXME, this loses when REGISTER_VIRTUAL (REGNO) is true. Also,
+ shouldn't the val arg be a LONGEST or something? */
void
write_register (regno, val)
int regno, val;
{
+ REGISTER_TYPE reg;
+
/* On the sparc, writing %g0 is a no-op, so we don't even want to change
the registers array if something writes to this register. */
if (CANNOT_STORE_REGISTER (regno))
return;
- SWAP_TARGET_AND_HOST (&val, sizeof (int));
+ reg = val;
+ SWAP_TARGET_AND_HOST (®, sizeof (REGISTER_TYPE));
target_prepare_to_store ();
register_valid [regno] = 1;
- /* FIXME, this loses when REGISTER_RAW_SIZE (regno) != sizeof (int) */
- /* FIXME, this depends on REGISTER_BYTE (regno) being aligned for host */
- *(int *) ®isters[REGISTER_BYTE (regno)] = val;
+ memcpy (®isters[REGISTER_BYTE (regno)], ®, sizeof (REGISTER_TYPE));
target_store_registers (regno);
}
char *val;
{
register_valid[regno] = 1;
- bcopy (val, ®isters[REGISTER_BYTE (regno)], REGISTER_RAW_SIZE (regno));
+ (void) memcpy (®isters[REGISTER_BYTE (regno)], val,
+ REGISTER_RAW_SIZE (regno));
}
\f
/* Given a struct symbol for a variable,
and a stack frame id, read the value of the variable
and return a (pointer to a) struct value containing the value.
- If the variable cannot be found, return a zero pointer. */
+ If the variable cannot be found, return a zero pointer.
+ If FRAME is NULL, use the selected_frame. */
value
read_var_value (var, frame)
struct frame_info *fi;
struct type *type = SYMBOL_TYPE (var);
CORE_ADDR addr;
- int val;
register int len;
v = allocate_value (type);
switch (SYMBOL_CLASS (var))
{
case LOC_CONST:
- val = SYMBOL_VALUE (var);
- bcopy (&val, VALUE_CONTENTS_RAW (v), len);
+ (void) memcpy (VALUE_CONTENTS_RAW (v), &SYMBOL_VALUE (var), len);
SWAP_TARGET_AND_HOST (VALUE_CONTENTS_RAW (v), len);
VALUE_LVAL (v) = not_lval;
return v;
case LOC_LABEL:
addr = SYMBOL_VALUE_ADDRESS (var);
- bcopy (&addr, VALUE_CONTENTS_RAW (v), len);
+ (void) memcpy (VALUE_CONTENTS_RAW (v), &addr, len);
SWAP_TARGET_AND_HOST (VALUE_CONTENTS_RAW (v), len);
VALUE_LVAL (v) = not_lval;
return v;
case LOC_CONST_BYTES:
- addr = SYMBOL_VALUE_ADDRESS (var);
- bcopy (addr, VALUE_CONTENTS_RAW (v), len);
- VALUE_LVAL (v) = not_lval;
- return v;
+ {
+ char *bytes_addr;
+ bytes_addr = SYMBOL_VALUE_BYTES (var);
+ (void) memcpy (VALUE_CONTENTS_RAW (v), bytes_addr, len);
+ VALUE_LVAL (v) = not_lval;
+ return v;
+ }
case LOC_STATIC:
- case LOC_EXTERNAL:
addr = SYMBOL_VALUE_ADDRESS (var);
break;
-/* Nonzero if a struct which is located in a register or a LOC_ARG
- really contains
- the address of the struct, not the struct itself. GCC_P is nonzero
- if the function was compiled with GCC. */
-#if !defined (REG_STRUCT_HAS_ADDR)
-#define REG_STRUCT_HAS_ADDR(gcc_p) 0
-#endif
-
case LOC_ARG:
- fi = get_frame_info (frame);
- addr = FRAME_ARGS_ADDRESS (fi);
- if (!addr) {
- return 0;
- }
+ if (SYMBOL_BASEREG_VALID (var))
+ {
+ addr = FRAME_GET_BASEREG_VALUE (frame, SYMBOL_BASEREG (var));
+ }
+ else
+ {
+ fi = get_frame_info (frame);
+ if (fi == NULL)
+ return 0;
+ addr = FRAME_ARGS_ADDRESS (fi);
+ }
+ if (!addr)
+ {
+ return 0;
+ }
addr += SYMBOL_VALUE (var);
break;
case LOC_REF_ARG:
- fi = get_frame_info (frame);
- addr = FRAME_ARGS_ADDRESS (fi);
- if (!addr) {
- return 0;
- }
+ if (SYMBOL_BASEREG_VALID (var))
+ {
+ addr = FRAME_GET_BASEREG_VALUE (frame, SYMBOL_BASEREG (var));
+ }
+ else
+ {
+ fi = get_frame_info (frame);
+ if (fi == NULL)
+ return 0;
+ addr = FRAME_ARGS_ADDRESS (fi);
+ }
+ if (!addr)
+ {
+ return 0;
+ }
addr += SYMBOL_VALUE (var);
- addr = read_memory_integer (addr, sizeof (CORE_ADDR));
+ read_memory (addr, (char *) &addr, sizeof (CORE_ADDR));
break;
case LOC_LOCAL:
case LOC_LOCAL_ARG:
- fi = get_frame_info (frame);
- addr = SYMBOL_VALUE (var) + FRAME_LOCALS_ADDRESS (fi);
+ if (SYMBOL_BASEREG_VALID (var))
+ {
+ addr = FRAME_GET_BASEREG_VALUE (frame, SYMBOL_BASEREG (var));
+ }
+ else
+ {
+ fi = get_frame_info (frame);
+ if (fi == NULL)
+ return 0;
+ addr = FRAME_LOCALS_ADDRESS (fi);
+ }
+ addr += SYMBOL_VALUE (var);
break;
case LOC_TYPEDEF:
case LOC_REGISTER:
case LOC_REGPARM:
{
- struct block *b = get_frame_block (frame);
+ struct block *b;
+ if (frame == NULL)
+ return 0;
+ b = get_frame_block (frame);
+
v = value_from_register (type, SYMBOL_VALUE (var), frame);
- if (REG_STRUCT_HAS_ADDR(b->gcc_compile_flag)
- && TYPE_CODE (type) == TYPE_CODE_STRUCT)
+ /* Nonzero if a struct which is located in a register or a LOC_ARG
+ really contains
+ the address of the struct, not the struct itself. GCC_P is nonzero
+ if the function was compiled with GCC. */
+#if !defined (REG_STRUCT_HAS_ADDR)
+#define REG_STRUCT_HAS_ADDR(gcc_p) 0
+#endif
+
+ if (REG_STRUCT_HAS_ADDR (BLOCK_GCC_COMPILED (b))
+ && ( (TYPE_CODE (type) == TYPE_CODE_STRUCT)
+ || (TYPE_CODE (type) == TYPE_CODE_UNION)))
addr = *(CORE_ADDR *)VALUE_CONTENTS (v);
else
return v;
endian machines. */
/* Copy into the contents section of the value. */
- bcopy (value_bytes, VALUE_CONTENTS_RAW (v), len);
+ (void) memcpy (VALUE_CONTENTS_RAW (v), value_bytes, len);
return v;
}
with raw type `extended' and virtual type `double'.
Fetch it as a `double' and then convert to `float'. */
v = allocate_value (REGISTER_VIRTUAL_TYPE (regnum));
- bcopy (virtual_buffer, VALUE_CONTENTS_RAW (v), len);
+ (void) memcpy (VALUE_CONTENTS_RAW (v), virtual_buffer, len);
v = value_cast (type, v);
}
else
- bcopy (virtual_buffer, VALUE_CONTENTS_RAW (v), len);
+ (void) memcpy (VALUE_CONTENTS_RAW (v), virtual_buffer, len);
}
else
{
}
#endif
- bcopy (virtual_buffer + VALUE_OFFSET (v),
- VALUE_CONTENTS_RAW (v), len);
+ (void) memcpy (VALUE_CONTENTS_RAW (v), virtual_buffer + VALUE_OFFSET (v),
+ len);
}
return v;
}
\f
-/* Given a struct symbol for a variable,
+/* Given a struct symbol for a variable or function,
and a stack frame id,
- return a (pointer to a) struct value containing the variable's address. */
+ return a (pointer to a) struct value containing the properly typed
+ address. */
value
locate_var_value (var, frame)
{
CORE_ADDR addr = 0;
struct type *type = SYMBOL_TYPE (var);
- struct type *result_type;
value lazy_value;
/* Evaluate it first; if the result is a memory address, we're fine.
if (lazy_value == 0)
error ("Address of \"%s\" is unknown.", SYMBOL_NAME (var));
- if (VALUE_LAZY (lazy_value))
+ if (VALUE_LAZY (lazy_value)
+ || TYPE_CODE (type) == TYPE_CODE_FUNC)
{
addr = VALUE_ADDRESS (lazy_value);
-
- /* C++: The "address" of a reference should yield the address
- * of the object pointed to. So force an extra de-reference. */
-
- if (TYPE_CODE (type) == TYPE_CODE_REF)
- {
- char *buf = alloca (TYPE_LENGTH (type));
- read_memory (addr, buf, TYPE_LENGTH (type));
- addr = unpack_long (type, buf);
- type = TYPE_TARGET_TYPE (type);
- }
-
- /* Address of an array is of the type of address of it's elements. */
- result_type =
- lookup_pointer_type (TYPE_CODE (type) == TYPE_CODE_ARRAY ?
- TYPE_TARGET_TYPE (type) : type);
-
- return value_cast (result_type,
- value_from_long (builtin_type_long, (LONGEST) addr));
+ return value_from_longest (lookup_pointer_type (type), (LONGEST) addr);
}
/* Not a memory address; check what the problem was. */
projects / deliverable / binutils-gdb.git / blobdiff