/* Find a variable's value in memory, for GDB, the GNU debugger.
- Copyright 1986, 87, 89, 91, 94, 95, 96, 1998, 2001
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001
Free Software Foundation, Inc.
This file is part of GDB.
#include "inferior.h"
#include "target.h"
#include "gdb_string.h"
+#include "gdb_assert.h"
#include "floatformat.h"
#include "symfile.h" /* for overlay functions */
#include "regcache.h"
-\f
-/* Extract a floating-point number from a target-order byte-stream at ADDR.
- Returns the value as type DOUBLEST.
-
- If the host and target formats agree, we just copy the raw data into the
- appropriate type of variable and return, letting the host increase precision
- as necessary. Otherwise, we call the conversion routine and let it do the
- dirty work. */
-
-DOUBLEST
-extract_floating (void *addr, int len)
-{
- DOUBLEST dretval;
-
- if (len * TARGET_CHAR_BIT == TARGET_FLOAT_BIT)
- {
- if (HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT)
- {
- float retval;
-
- memcpy (&retval, addr, sizeof (retval));
- return retval;
- }
- else
- floatformat_to_doublest (TARGET_FLOAT_FORMAT, addr, &dretval);
- }
- else if (len * TARGET_CHAR_BIT == TARGET_DOUBLE_BIT)
- {
- if (HOST_DOUBLE_FORMAT == TARGET_DOUBLE_FORMAT)
- {
- double retval;
-
- memcpy (&retval, addr, sizeof (retval));
- return retval;
- }
- else
- floatformat_to_doublest (TARGET_DOUBLE_FORMAT, addr, &dretval);
- }
- else if (len * TARGET_CHAR_BIT == TARGET_LONG_DOUBLE_BIT)
- {
- if (HOST_LONG_DOUBLE_FORMAT == TARGET_LONG_DOUBLE_FORMAT)
- {
- DOUBLEST retval;
-
- memcpy (&retval, addr, sizeof (retval));
- return retval;
- }
- else
- floatformat_to_doublest (TARGET_LONG_DOUBLE_FORMAT, addr, &dretval);
- }
- else
- {
- error ("Can't deal with a floating point number of %d bytes.", len);
- }
-
- return dretval;
-}
-
-void
-store_floating (void *addr, int len, DOUBLEST val)
-{
- if (len * TARGET_CHAR_BIT == TARGET_FLOAT_BIT)
- {
- if (HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT)
- {
- float floatval = val;
-
- memcpy (addr, &floatval, sizeof (floatval));
- }
- else
- floatformat_from_doublest (TARGET_FLOAT_FORMAT, &val, addr);
- }
- else if (len * TARGET_CHAR_BIT == TARGET_DOUBLE_BIT)
- {
- if (HOST_DOUBLE_FORMAT == TARGET_DOUBLE_FORMAT)
- {
- double doubleval = val;
-
- memcpy (addr, &doubleval, sizeof (doubleval));
- }
- else
- floatformat_from_doublest (TARGET_DOUBLE_FORMAT, &val, addr);
- }
- else if (len * TARGET_CHAR_BIT == TARGET_LONG_DOUBLE_BIT)
- {
- if (HOST_LONG_DOUBLE_FORMAT == TARGET_LONG_DOUBLE_FORMAT)
- memcpy (addr, &val, sizeof (val));
- else
- floatformat_from_doublest (TARGET_LONG_DOUBLE_FORMAT, &val, addr);
- }
- else
- {
- error ("Can't deal with a floating point number of %d bytes.", len);
- }
-}
-
/* Return a `value' with the contents of register REGNUM
in its virtual format, with the type specified by
REGISTER_VIRTUAL_TYPE.
NOTE: returns NULL if register value is not available.
Caller will check return value or die! */
-value_ptr
+struct value *
value_of_register (int regnum)
{
CORE_ADDR addr;
int optim;
- register value_ptr reg_val;
+ struct value *reg_val;
char *raw_buffer = (char*) alloca (MAX_REGISTER_RAW_SIZE);
enum lval_type lval;
If the variable cannot be found, return a zero pointer.
If FRAME is NULL, use the selected_frame. */
-value_ptr
+struct value *
read_var_value (register struct symbol *var, struct frame_info *frame)
{
- register value_ptr v;
+ register struct value *v;
struct type *type = SYMBOL_TYPE (var);
CORE_ADDR addr;
register int len;
break;
case LOC_INDIRECT:
- /* The import slot does not have a real address in it from the
- dynamic loader (dld.sl on HP-UX), if the target hasn't begun
- execution yet, so check for that. */
- if (!target_has_execution)
- error ("\
+ {
+ /* The import slot does not have a real address in it from the
+ dynamic loader (dld.sl on HP-UX), if the target hasn't
+ begun execution yet, so check for that. */
+ CORE_ADDR locaddr;
+ struct value *loc;
+ if (!target_has_execution)
+ error ("\
Attempt to access variable defined in different shared object or load module when\n\
addresses have not been bound by the dynamic loader. Try again when executable is running.");
- addr = SYMBOL_VALUE_ADDRESS (var);
- addr = read_memory_unsigned_integer
- (addr, TARGET_PTR_BIT / TARGET_CHAR_BIT);
- break;
+ locaddr = SYMBOL_VALUE_ADDRESS (var);
+ loc = value_at (lookup_pointer_type (type), locaddr, NULL);
+ addr = value_as_address (loc);
+ }
case LOC_ARG:
if (frame == NULL)
break;
case LOC_REF_ARG:
- if (frame == NULL)
- return 0;
- addr = FRAME_ARGS_ADDRESS (frame);
- if (!addr)
- return 0;
- addr += SYMBOL_VALUE (var);
- addr = read_memory_unsigned_integer
- (addr, TARGET_PTR_BIT / TARGET_CHAR_BIT);
- break;
+ {
+ struct value *ref;
+ CORE_ADDR argref;
+ if (frame == NULL)
+ return 0;
+ argref = FRAME_ARGS_ADDRESS (frame);
+ if (!argref)
+ return 0;
+ argref += SYMBOL_VALUE (var);
+ ref = value_at (lookup_pointer_type (type), argref, NULL);
+ addr = value_as_address (ref);
+ break;
+ }
case LOC_LOCAL:
case LOC_LOCAL_ARG:
case LOC_BASEREG:
case LOC_BASEREG_ARG:
- {
- char *buf = (char*) alloca (MAX_REGISTER_RAW_SIZE);
- get_saved_register (buf, NULL, NULL, frame, SYMBOL_BASEREG (var),
- NULL);
- addr = extract_address (buf, REGISTER_RAW_SIZE (SYMBOL_BASEREG (var)));
- addr += SYMBOL_VALUE (var);
- break;
- }
-
case LOC_THREAD_LOCAL_STATIC:
{
- char *buf = (char*) alloca (MAX_REGISTER_RAW_SIZE);
+ struct value *regval;
- get_saved_register (buf, NULL, NULL, frame, SYMBOL_BASEREG (var),
- NULL);
- addr = extract_address (buf, REGISTER_RAW_SIZE (SYMBOL_BASEREG (var)));
+ regval = value_from_register (lookup_pointer_type (type),
+ SYMBOL_BASEREG (var), frame);
+ if (regval == NULL)
+ error ("Value of base register not available.");
+ addr = value_as_address (regval);
addr += SYMBOL_VALUE (var);
break;
}
{
struct block *b;
int regno = SYMBOL_VALUE (var);
- value_ptr regval;
+ struct value *regval;
if (frame == NULL)
return 0;
if (regval == NULL)
error ("Value of register variable not available.");
- addr = value_as_pointer (regval);
+ addr = value_as_address (regval);
VALUE_LVAL (v) = lval_memory;
}
else
NOTE: returns NULL if register value is not available.
Caller will check return value or die! */
-value_ptr
+struct value *
value_from_register (struct type *type, int regnum, struct frame_info *frame)
{
char *raw_buffer = (char*) alloca (MAX_REGISTER_RAW_SIZE);
CORE_ADDR addr;
int optim;
- value_ptr v = allocate_value (type);
+ struct value *v = allocate_value (type);
char *value_bytes = 0;
int value_bytes_copied = 0;
int num_storage_locs;
CHECK_TYPEDEF (type);
len = TYPE_LENGTH (type);
- /* Pointers on D10V are really only 16 bits,
- but we lie to gdb elsewhere... */
- if (GDB_TARGET_IS_D10V && TYPE_CODE (type) == TYPE_CODE_PTR)
- len = 2;
-
VALUE_REGNO (v) = regnum;
num_storage_locs = (len > REGISTER_VIRTUAL_SIZE (regnum) ?
memcpy (VALUE_CONTENTS_RAW (v), raw_buffer + VALUE_OFFSET (v), len);
}
- if (GDB_TARGET_IS_D10V
- && TYPE_CODE (type) == TYPE_CODE_PTR)
- {
- unsigned long num;
- unsigned short snum;
-
- snum = (unsigned short)
- extract_unsigned_integer (VALUE_CONTENTS_RAW (v), 2);
-
- if (TYPE_TARGET_TYPE (type) /* pointer to function */
- && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC))
- num = D10V_MAKE_IADDR (snum);
- else /* pointer to data */
- num = D10V_MAKE_DADDR (snum);
-
- store_address (VALUE_CONTENTS_RAW (v), 4, num);
- }
-
return v;
}
\f
return a (pointer to a) struct value containing the properly typed
address. */
-value_ptr
+struct value *
locate_var_value (register struct symbol *var, struct frame_info *frame)
{
CORE_ADDR addr = 0;
struct type *type = SYMBOL_TYPE (var);
- value_ptr lazy_value;
+ struct value *lazy_value;
/* Evaluate it first; if the result is a memory address, we're fine.
Lazy evaluation pays off here. */
if (VALUE_LAZY (lazy_value)
|| TYPE_CODE (type) == TYPE_CODE_FUNC)
{
- value_ptr val;
+ struct value *val;
addr = VALUE_ADDRESS (lazy_value);
val = value_from_pointer (lookup_pointer_type (type), addr);
switch (VALUE_LVAL (lazy_value))
{
case lval_register:
+ gdb_assert (REGISTER_NAME (VALUE_REGNO (lazy_value)) != NULL
+ && *REGISTER_NAME (VALUE_REGNO (lazy_value)) != '\0');
+ error("Address requested for identifier "
+ "\"%s\" which is in register $%s",
+ SYMBOL_SOURCE_NAME (var),
+ REGISTER_NAME (VALUE_REGNO (lazy_value)));
+ break;
+
case lval_reg_frame_relative:
- error ("Address requested for identifier \"%s\" which is in a register.",
- SYMBOL_SOURCE_NAME (var));
+ gdb_assert (REGISTER_NAME (VALUE_FRAME_REGNUM (lazy_value)) != NULL
+ && *REGISTER_NAME (VALUE_FRAME_REGNUM (lazy_value)) != '\0');
+ error("Address requested for identifier "
+ "\"%s\" which is in frame register $%s",
+ SYMBOL_SOURCE_NAME (var),
+ REGISTER_NAME (VALUE_FRAME_REGNUM (lazy_value)));
break;
default:
projects / deliverable / binutils-gdb.git / blobdiff