/* Find a variable's value in memory, for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
- 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004 Free Software
- Foundation, Inc.
+ Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2007
+ Free Software Foundation, Inc.
This file is part of GDB.
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "symtab.h"
#endif
LONGEST
-extract_signed_integer (const void *addr, int len)
+extract_signed_integer (const gdb_byte *addr, int len)
{
LONGEST retval;
const unsigned char *p;
const unsigned char *endaddr = startaddr + len;
if (len > (int) sizeof (LONGEST))
- error ("\
-That operation is not available on integers of more than %d bytes.",
+ error (_("\
+That operation is not available on integers of more than %d bytes."),
(int) sizeof (LONGEST));
/* Start at the most significant end of the integer, and work towards
the least significant. */
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+ if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
{
p = startaddr;
/* Do the sign extension once at the start. */
}
ULONGEST
-extract_unsigned_integer (const void *addr, int len)
+extract_unsigned_integer (const gdb_byte *addr, int len)
{
ULONGEST retval;
const unsigned char *p;
const unsigned char *endaddr = startaddr + len;
if (len > (int) sizeof (ULONGEST))
- error ("\
-That operation is not available on integers of more than %d bytes.",
+ error (_("\
+That operation is not available on integers of more than %d bytes."),
(int) sizeof (ULONGEST));
/* Start at the most significant end of the integer, and work towards
the least significant. */
retval = 0;
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+ if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
{
for (p = startaddr; p < endaddr; ++p)
retval = (retval << 8) | *p;
function returns 1 and sets *PVAL. Otherwise it returns 0. */
int
-extract_long_unsigned_integer (const void *addr, int orig_len, LONGEST *pval)
+extract_long_unsigned_integer (const gdb_byte *addr, int orig_len,
+ LONGEST *pval)
{
- char *p, *first_addr;
+ const gdb_byte *p;
+ const gdb_byte *first_addr;
int len;
len = orig_len;
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+ if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
{
- for (p = (char *) addr;
- len > (int) sizeof (LONGEST) && p < (char *) addr + orig_len;
+ for (p = addr;
+ len > (int) sizeof (LONGEST) && p < addr + orig_len;
p++)
{
if (*p == 0)
}
else
{
- first_addr = (char *) addr;
- for (p = (char *) addr + orig_len - 1;
- len > (int) sizeof (LONGEST) && p >= (char *) addr;
+ first_addr = addr;
+ for (p = addr + orig_len - 1;
+ len > (int) sizeof (LONGEST) && p >= addr;
p--)
{
if (*p == 0)
/* Treat the bytes at BUF as a pointer of type TYPE, and return the
address it represents. */
CORE_ADDR
-extract_typed_address (const void *buf, struct type *type)
+extract_typed_address (const gdb_byte *buf, struct type *type)
{
if (TYPE_CODE (type) != TYPE_CODE_PTR
&& TYPE_CODE (type) != TYPE_CODE_REF)
internal_error (__FILE__, __LINE__,
- "extract_typed_address: "
- "type is not a pointer or reference");
+ _("extract_typed_address: "
+ "type is not a pointer or reference"));
- return POINTER_TO_ADDRESS (type, buf);
+ return gdbarch_pointer_to_address (current_gdbarch, type, buf);
}
void
-store_signed_integer (void *addr, int len, LONGEST val)
+store_signed_integer (gdb_byte *addr, int len, LONGEST val)
{
- unsigned char *p;
- unsigned char *startaddr = (unsigned char *) addr;
- unsigned char *endaddr = startaddr + len;
+ gdb_byte *p;
+ gdb_byte *startaddr = addr;
+ gdb_byte *endaddr = startaddr + len;
/* Start at the least significant end of the integer, and work towards
the most significant. */
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+ if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
{
for (p = endaddr - 1; p >= startaddr; --p)
{
}
void
-store_unsigned_integer (void *addr, int len, ULONGEST val)
+store_unsigned_integer (gdb_byte *addr, int len, ULONGEST val)
{
unsigned char *p;
unsigned char *startaddr = (unsigned char *) addr;
/* Start at the least significant end of the integer, and work towards
the most significant. */
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+ if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
{
for (p = endaddr - 1; p >= startaddr; --p)
{
/* Store the address ADDR as a pointer of type TYPE at BUF, in target
form. */
void
-store_typed_address (void *buf, struct type *type, CORE_ADDR addr)
+store_typed_address (gdb_byte *buf, struct type *type, CORE_ADDR addr)
{
if (TYPE_CODE (type) != TYPE_CODE_PTR
&& TYPE_CODE (type) != TYPE_CODE_REF)
internal_error (__FILE__, __LINE__,
- "store_typed_address: "
- "type is not a pointer or reference");
+ _("store_typed_address: "
+ "type is not a pointer or reference"));
- ADDRESS_TO_POINTER (type, buf, addr);
+ gdbarch_address_to_pointer (current_gdbarch, type, buf, addr);
}
/* Return a `value' with the contents of (virtual or cooked) register
REGNUM as found in the specified FRAME. The register's type is
- determined by register_type().
-
- NOTE: returns NULL if register value is not available. Caller will
- check return value or die! */
+ determined by register_type(). */
struct value *
value_of_register (int regnum, struct frame_info *frame)
int optim;
struct value *reg_val;
int realnum;
- char raw_buffer[MAX_REGISTER_SIZE];
+ gdb_byte raw_buffer[MAX_REGISTER_SIZE];
enum lval_type lval;
/* User registers lie completely outside of the range of normal
registers. Catch them early so that the target never sees them. */
- if (regnum >= NUM_REGS + NUM_PSEUDO_REGS)
+ if (regnum >= gdbarch_num_regs (current_gdbarch)
+ + gdbarch_num_pseudo_regs (current_gdbarch))
return value_of_user_reg (regnum, frame);
frame_register (frame, regnum, &optim, &lval, &addr, &realnum, raw_buffer);
- /* FIXME: cagney/2002-05-15: This test is just bogus.
-
- It indicates that the target failed to supply a value for a
- register because it was "not available" at this time. Problem
- is, the target still has the register and so get saved_register()
- may be returning a value saved on the stack. */
-
- if (register_cached (regnum) < 0)
- return NULL; /* register value not available */
-
reg_val = allocate_value (register_type (current_gdbarch, regnum));
- /* Convert raw data to virtual format if necessary. */
-
- if (DEPRECATED_REGISTER_CONVERTIBLE_P ()
- && DEPRECATED_REGISTER_CONVERTIBLE (regnum))
- {
- DEPRECATED_REGISTER_CONVERT_TO_VIRTUAL (regnum, register_type (current_gdbarch, regnum),
- raw_buffer, VALUE_CONTENTS_RAW (reg_val));
- }
- else if (DEPRECATED_REGISTER_RAW_SIZE (regnum) == DEPRECATED_REGISTER_VIRTUAL_SIZE (regnum))
- memcpy (VALUE_CONTENTS_RAW (reg_val), raw_buffer,
- DEPRECATED_REGISTER_RAW_SIZE (regnum));
- else
- internal_error (__FILE__, __LINE__,
- "Register \"%s\" (%d) has conflicting raw (%d) and virtual (%d) size",
- REGISTER_NAME (regnum),
- regnum,
- DEPRECATED_REGISTER_RAW_SIZE (regnum),
- DEPRECATED_REGISTER_VIRTUAL_SIZE (regnum));
+ memcpy (value_contents_raw (reg_val), raw_buffer,
+ register_size (current_gdbarch, regnum));
VALUE_LVAL (reg_val) = lval;
VALUE_ADDRESS (reg_val) = addr;
- VALUE_REGNO (reg_val) = regnum;
- VALUE_OPTIMIZED_OUT (reg_val) = optim;
+ VALUE_REGNUM (reg_val) = regnum;
+ set_value_optimized_out (reg_val, optim);
+ VALUE_FRAME_ID (reg_val) = get_frame_id (frame);
return reg_val;
}
/* Given a pointer of type TYPE in target form in BUF, return the
address it represents. */
CORE_ADDR
-unsigned_pointer_to_address (struct type *type, const void *buf)
+unsigned_pointer_to_address (struct type *type, const gdb_byte *buf)
{
return extract_unsigned_integer (buf, TYPE_LENGTH (type));
}
CORE_ADDR
-signed_pointer_to_address (struct type *type, const void *buf)
+signed_pointer_to_address (struct type *type, const gdb_byte *buf)
{
return extract_signed_integer (buf, TYPE_LENGTH (type));
}
/* Given an address, store it as a pointer of type TYPE in target
format in BUF. */
void
-unsigned_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr)
+unsigned_address_to_pointer (struct type *type, gdb_byte *buf,
+ CORE_ADDR addr)
{
store_unsigned_integer (buf, TYPE_LENGTH (type), addr);
}
void
-address_to_signed_pointer (struct type *type, void *buf, CORE_ADDR addr)
+address_to_signed_pointer (struct type *type, gdb_byte *buf, CORE_ADDR addr)
{
store_signed_integer (buf, TYPE_LENGTH (type), addr);
}
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 FRAME is NULL, use the deprecated_selected_frame. */
+ If FRAME is NULL, use the selected frame. */
struct value *
read_var_value (struct symbol *var, struct frame_info *frame)
CORE_ADDR addr;
int len;
- v = allocate_value (type);
- VALUE_LVAL (v) = lval_memory; /* The most likely possibility. */
- VALUE_BFD_SECTION (v) = SYMBOL_BFD_SECTION (var);
+ if (SYMBOL_CLASS (var) == LOC_COMPUTED
+ || SYMBOL_CLASS (var) == LOC_COMPUTED_ARG
+ || SYMBOL_CLASS (var) == LOC_REGISTER
+ || SYMBOL_CLASS (var) == LOC_REGPARM)
+ /* These cases do not use V. */
+ v = NULL;
+ else
+ {
+ v = allocate_value (type);
+ VALUE_LVAL (v) = lval_memory; /* The most likely possibility. */
+ }
len = TYPE_LENGTH (type);
-
/* FIXME drow/2003-09-06: this call to the selected frame should be
pushed upwards to the callers. */
if (frame == NULL)
{
case LOC_CONST:
/* Put the constant back in target format. */
- store_signed_integer (VALUE_CONTENTS_RAW (v), len,
+ store_signed_integer (value_contents_raw (v), len,
(LONGEST) SYMBOL_VALUE (var));
VALUE_LVAL (v) = not_lval;
return v;
CORE_ADDR addr
= symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (var),
SYMBOL_BFD_SECTION (var));
- store_typed_address (VALUE_CONTENTS_RAW (v), type, addr);
+ store_typed_address (value_contents_raw (v), type, addr);
}
else
- store_typed_address (VALUE_CONTENTS_RAW (v), type,
+ store_typed_address (value_contents_raw (v), type,
SYMBOL_VALUE_ADDRESS (var));
VALUE_LVAL (v) = not_lval;
return v;
case LOC_CONST_BYTES:
{
- char *bytes_addr;
- bytes_addr = SYMBOL_VALUE_BYTES (var);
- memcpy (VALUE_CONTENTS_RAW (v), bytes_addr, len);
+ memcpy (value_contents_raw (v), SYMBOL_VALUE_BYTES (var), len);
VALUE_LVAL (v) = not_lval;
return v;
}
CORE_ADDR locaddr;
struct value *loc;
if (!target_has_execution)
- error ("\
+ 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.");
+addresses have not been bound by the dynamic loader. Try again when executable is running."));
locaddr = SYMBOL_VALUE_ADDRESS (var);
- loc = value_at (lookup_pointer_type (type), locaddr, NULL);
+ loc = value_at (lookup_pointer_type (type), locaddr);
addr = value_as_address (loc);
+ break;
}
case LOC_ARG:
if (!argref)
return 0;
argref += SYMBOL_VALUE (var);
- ref = value_at (lookup_pointer_type (type), argref, NULL);
+ ref = value_at (lookup_pointer_type (type), argref);
addr = value_as_address (ref);
break;
}
regval = value_from_register (lookup_pointer_type (type),
SYMBOL_BASEREG (var), frame);
if (regval == NULL)
- error ("Value of base register not available.");
+ error (_("Value of base register not available."));
addr = value_as_address (regval);
addr += SYMBOL_VALUE (var);
break;
}
case LOC_TYPEDEF:
- error ("Cannot look up value of a typedef");
+ error (_("Cannot look up value of a typedef"));
break;
case LOC_BLOCK:
frame);
if (regval == NULL)
- error ("Value of register variable not available.");
+ error (_("Value of register variable not available."));
addr = value_as_address (regval);
VALUE_LVAL (v) = lval_memory;
regval = value_from_register (type, regno, frame);
if (regval == NULL)
- error ("Value of register variable not available.");
+ error (_("Value of register variable not available."));
return regval;
}
}
case LOC_OPTIMIZED_OUT:
VALUE_LVAL (v) = not_lval;
- VALUE_OPTIMIZED_OUT (v) = 1;
+ set_value_optimized_out (v, 1);
return v;
default:
- error ("Cannot look up value of a botched symbol.");
+ error (_("Cannot look up value of a botched symbol."));
break;
}
VALUE_ADDRESS (v) = addr;
- VALUE_LAZY (v) = 1;
+ set_value_lazy (v, 1);
return v;
}
-/* Return a value of type TYPE, stored in register REGNUM, in frame
- FRAME.
+/* Install default attributes for register values. */
- NOTE: returns NULL if register value is not available.
- Caller will check return value or die! */
+struct value *
+default_value_from_register (struct type *type, int regnum,
+ struct frame_info *frame)
+{
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ int len = TYPE_LENGTH (type);
+ struct value *value = allocate_value (type);
+
+ VALUE_LVAL (value) = lval_register;
+ VALUE_FRAME_ID (value) = get_frame_id (frame);
+ VALUE_REGNUM (value) = regnum;
+
+ /* Any structure stored in more than one register will always be
+ an integral number of registers. Otherwise, you need to do
+ some fiddling with the last register copied here for little
+ endian machines. */
+ if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG
+ && len < register_size (gdbarch, regnum))
+ /* Big-endian, and we want less than full size. */
+ set_value_offset (value, register_size (gdbarch, regnum) - len);
+ else
+ set_value_offset (value, 0);
+
+ return value;
+}
+
+/* Return a value of type TYPE, stored in register REGNUM, in frame FRAME. */
struct value *
value_from_register (struct type *type, int regnum, struct frame_info *frame)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
- struct value *v = allocate_value (type);
- CHECK_TYPEDEF (type);
+ struct type *type1 = check_typedef (type);
+ struct value *v;
- if (TYPE_LENGTH (type) == 0)
- {
- /* It doesn't matter much what we return for this: since the
- length is zero, it could be anything. But if allowed to see
- a zero-length type, the register-finding loop below will set
- neither mem_stor nor reg_stor, and then report an internal
- error.
-
- Zero-length types can legitimately arise from declarations
- like 'struct {}'. GDB may also create them when it finds
- bogus debugging information; for example, in GCC 2.94.4 and
- binutils 2.11.93.0.2, the STABS BINCL->EXCL compression
- process can create bad type numbers. GDB reads these as
- TYPE_CODE_UNDEF types, with zero length. (That bug is
- actually the only known way to get a zero-length value
- allocated to a register --- which is what it takes to make it
- here.)
-
- We'll just attribute the value to the original register. */
- VALUE_LVAL (v) = lval_register;
- VALUE_ADDRESS (v) = regnum;
- VALUE_REGNO (v) = regnum;
- }
- else if (CONVERT_REGISTER_P (regnum, type))
+ if (gdbarch_convert_register_p (current_gdbarch, regnum, type1))
{
/* The ISA/ABI need to something weird when obtaining the
specified value from this register. It might need to
re-order non-adjacent, starting with REGNUM (see MIPS and
i386). It might need to convert the [float] register into
the corresponding [integer] type (see Alpha). The assumption
- is that REGISTER_TO_VALUE populates the entire value
+ is that gdbarch_register_to_value populates the entire value
including the location. */
- REGISTER_TO_VALUE (frame, regnum, type, VALUE_CONTENTS_RAW (v));
- VALUE_LVAL (v) = lval_reg_frame_relative;
+ v = allocate_value (type);
+ VALUE_LVAL (v) = lval_register;
VALUE_FRAME_ID (v) = get_frame_id (frame);
- VALUE_FRAME_REGNUM (v) = regnum;
+ VALUE_REGNUM (v) = regnum;
+ gdbarch_register_to_value (current_gdbarch,
+ frame, regnum, type1, value_contents_raw (v));
}
else
{
- int local_regnum;
- int mem_stor = 0, reg_stor = 0;
- int mem_tracking = 1;
- CORE_ADDR last_addr = 0;
- CORE_ADDR first_addr = 0;
- int first_realnum = regnum;
int len = TYPE_LENGTH (type);
- int value_bytes_copied;
- int optimized = 0;
- char *value_bytes = (char *) alloca (len + MAX_REGISTER_SIZE);
-
- /* Copy all of the data out, whereever it may be. */
- for (local_regnum = regnum, value_bytes_copied = 0;
- value_bytes_copied < len;
- (value_bytes_copied += DEPRECATED_REGISTER_RAW_SIZE (local_regnum),
- ++local_regnum))
- {
- int realnum;
- int optim;
- enum lval_type lval;
- CORE_ADDR addr;
- frame_register (frame, local_regnum, &optim, &lval, &addr,
- &realnum, value_bytes + value_bytes_copied);
- optimized += optim;
- if (register_cached (local_regnum) == -1)
- return NULL; /* register value not available */
-
- if (regnum == local_regnum)
- {
- first_addr = addr;
- first_realnum = realnum;
- }
- if (lval == lval_register)
- reg_stor++;
- else
- {
- mem_stor++;
-
- mem_tracking = (mem_tracking
- && (regnum == local_regnum
- || addr == last_addr));
- }
- last_addr = addr;
- }
-
- /* FIXME: cagney/2003-06-04: Shouldn't this always use
- lval_reg_frame_relative? If it doesn't and the register's
- location changes (say after a resume) then this value is
- going to have wrong information. */
- if ((reg_stor && mem_stor)
- || (mem_stor && !mem_tracking))
- /* Mixed storage; all of the hassle we just went through was
- for some good purpose. */
- {
- VALUE_LVAL (v) = lval_reg_frame_relative;
- VALUE_FRAME_ID (v) = get_frame_id (frame);
- VALUE_FRAME_REGNUM (v) = regnum;
- }
- else if (mem_stor)
- {
- VALUE_LVAL (v) = lval_memory;
- VALUE_ADDRESS (v) = first_addr;
- }
- else if (reg_stor)
- {
- VALUE_LVAL (v) = lval_register;
- VALUE_ADDRESS (v) = first_addr;
- VALUE_REGNO (v) = first_realnum;
- }
- else
- internal_error (__FILE__, __LINE__,
- "value_from_register: Value not stored anywhere!");
-
- VALUE_OPTIMIZED_OUT (v) = optimized;
-
- /* Any structure stored in more than one register will always be
- an integral number of registers. Otherwise, you need to do
- some fiddling with the last register copied here for little
- endian machines. */
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
- && len < DEPRECATED_REGISTER_RAW_SIZE (regnum))
- /* Big-endian, and we want less than full size. */
- VALUE_OFFSET (v) = DEPRECATED_REGISTER_RAW_SIZE (regnum) - len;
- else
- VALUE_OFFSET (v) = 0;
- memcpy (VALUE_CONTENTS_RAW (v), value_bytes + VALUE_OFFSET (v), len);
+
+ /* Construct the value. */
+ v = gdbarch_value_from_register (gdbarch, type, regnum, frame);
+
+ /* Get the data. */
+ if (!get_frame_register_bytes (frame, regnum, value_offset (v), len,
+ value_contents_raw (v)))
+ set_value_optimized_out (v, 1);
}
return v;
}
+/* Return contents of register REGNUM in frame FRAME as address,
+ interpreted as value of type TYPE. Will abort if register
+ value is not available. */
+
+CORE_ADDR
+address_from_register (struct type *type, int regnum, struct frame_info *frame)
+{
+ struct value *value;
+ CORE_ADDR result;
+
+ value = value_from_register (type, regnum, frame);
+ gdb_assert (value);
+
+ result = value_as_address (value);
+ release_value (value);
+ value_free (value);
+
+ return result;
+}
+
\f
/* Given a struct symbol for a variable or function,
and a stack frame id,
lazy_value = read_var_value (var, frame);
if (lazy_value == 0)
- error ("Address of \"%s\" is unknown.", SYMBOL_PRINT_NAME (var));
+ error (_("Address of \"%s\" is unknown."), SYMBOL_PRINT_NAME (var));
- if (VALUE_LAZY (lazy_value)
+ if (value_lazy (lazy_value)
|| TYPE_CODE (type) == TYPE_CODE_FUNC)
{
struct value *val;
addr = VALUE_ADDRESS (lazy_value);
val = value_from_pointer (lookup_pointer_type (type), addr);
- VALUE_BFD_SECTION (val) = VALUE_BFD_SECTION (lazy_value);
return val;
}
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_PRINT_NAME (var),
- REGISTER_NAME (VALUE_REGNO (lazy_value)));
- break;
-
- case lval_reg_frame_relative:
- 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",
+ gdb_assert (gdbarch_register_name
+ (current_gdbarch, VALUE_REGNUM (lazy_value)) != NULL
+ && *gdbarch_register_name
+ (current_gdbarch, VALUE_REGNUM (lazy_value)) != '\0');
+ error (_("Address requested for identifier "
+ "\"%s\" which is in register $%s"),
SYMBOL_PRINT_NAME (var),
- REGISTER_NAME (VALUE_FRAME_REGNUM (lazy_value)));
+ gdbarch_register_name (current_gdbarch, VALUE_REGNUM (lazy_value)));
break;
default:
- error ("Can't take address of \"%s\" which isn't an lvalue.",
+ error (_("Can't take address of \"%s\" which isn't an lvalue."),
SYMBOL_PRINT_NAME (var));
break;
}