/* Find a variable's value in memory, for GDB, the GNU debugger.
- Copyright 1986, 1987, 1989, 1991, 1994, 1995 Free Software Foundation, Inc.
+ Copyright 1986, 87, 89, 91, 94, 95, 96, 1998
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "symtab.h"
#include "inferior.h"
#include "target.h"
#include "gdb_string.h"
+#include "floatformat.h"
+#include "symfile.h" /* for overlay functions */
+
+/* This is used to indicate that we don't know the format of the floating point
+ number. Typically, this is useful for native ports, where the actual format
+ is irrelevant, since no conversions will be taking place. */
+
+const struct floatformat floatformat_unknown;
/* Registers we shouldn't try to store. */
#if !defined (CANNOT_STORE_REGISTER)
#define CANNOT_STORE_REGISTER(regno) 0
#endif
-static void write_register_pid PARAMS ((int regno, LONGEST val, int pid));
+static void write_register_gen PARAMS ((int, char *));
/* Basic byte-swapping routines. GDB has needed these for a long time...
All extract a target-format integer at ADDR which is LEN bytes long. */
unsigned char *startaddr = (unsigned char *)addr;
unsigned char *endaddr = startaddr + len;
- if (len > sizeof (LONGEST))
+ if (len > (int) sizeof (LONGEST))
error ("\
That operation is not available on integers of more than %d bytes.",
sizeof (LONGEST));
return retval;
}
-unsigned LONGEST
+ULONGEST
extract_unsigned_integer (addr, len)
PTR addr;
int len;
{
- unsigned LONGEST retval;
+ ULONGEST retval;
unsigned char *p;
unsigned char *startaddr = (unsigned char *)addr;
unsigned char *endaddr = startaddr + len;
- if (len > sizeof (unsigned LONGEST))
+ if (len > (int) sizeof (ULONGEST))
error ("\
That operation is not available on integers of more than %d bytes.",
- sizeof (unsigned LONGEST));
+ sizeof (ULONGEST));
/* Start at the most significant end of the integer, and work towards
the least significant. */
return retval;
}
+/* Sometimes a long long unsigned integer can be extracted as a
+ LONGEST value. This is done so that we can print these values
+ better. If this integer can be converted to a LONGEST, this
+ function returns 1 and sets *PVAL. Otherwise it returns 0. */
+
+int
+extract_long_unsigned_integer (addr, orig_len, pval)
+ PTR addr;
+ int orig_len;
+ LONGEST *pval;
+{
+ char *p, *first_addr;
+ int len;
+
+ len = orig_len;
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ {
+ for (p = (char *) addr;
+ len > (int) sizeof (LONGEST) && p < (char *) addr + orig_len;
+ p++)
+ {
+ if (*p == 0)
+ len--;
+ else
+ break;
+ }
+ first_addr = p;
+ }
+ else
+ {
+ first_addr = (char *) addr;
+ for (p = (char *) addr + orig_len - 1;
+ len > (int) sizeof (LONGEST) && p >= (char *) addr;
+ p--)
+ {
+ if (*p == 0)
+ len--;
+ else
+ break;
+ }
+ }
+
+ if (len <= (int) sizeof (LONGEST))
+ {
+ *pval = (LONGEST) extract_unsigned_integer (first_addr,
+ sizeof (LONGEST));
+ return 1;
+ }
+
+ return 0;
+}
+
CORE_ADDR
extract_address (addr, len)
PTR addr;
{
/* Assume a CORE_ADDR can fit in a LONGEST (for now). Not sure
whether we want this to be true eventually. */
- return extract_unsigned_integer (addr, len);
+ return (CORE_ADDR)extract_unsigned_integer (addr, len);
}
void
store_unsigned_integer (addr, len, val)
PTR addr;
int len;
- unsigned LONGEST val;
+ ULONGEST val;
{
unsigned char *p;
unsigned char *startaddr = (unsigned char *)addr;
}
}
+/* Store the literal address "val" into
+ gdb-local memory pointed to by "addr"
+ for "len" bytes. */
void
store_address (addr, len, val)
PTR addr;
int len;
- CORE_ADDR val;
+ LONGEST val;
{
- /* Assume a CORE_ADDR can fit in a LONGEST (for now). Not sure
- whether we want this to be true eventually. */
- store_unsigned_integer (addr, len, (LONGEST)val);
+ if( TARGET_BYTE_ORDER == BIG_ENDIAN
+ && len != sizeof( LONGEST )) {
+ /* On big-endian machines (e.g., HPPA 2.0, narrow mode)
+ * just letting this fall through to the call below will
+ * lead to the wrong bits being stored.
+ *
+ * Only the simplest case is fixed here, the others just
+ * get the old behavior.
+ */
+ if( (len == sizeof( CORE_ADDR ))
+ && (sizeof( LONGEST ) == 2 * sizeof( CORE_ADDR ))) {
+ /* Watch out! The high bits are garbage! */
+ CORE_ADDR coerce[2];
+ *(LONGEST*)&coerce = val;
+
+ store_unsigned_integer (addr, len, coerce[1] ); /* BIG_ENDIAN code! */
+ return;
+ }
+ }
+ store_unsigned_integer (addr, len, val);
}
\f
/* Swap LEN bytes at BUFFER between target and host byte-order. */
} \
while (0)
-/* There are various problems with the extract_floating and store_floating
- routines.
-
- 1. These routines only handle byte-swapping, not conversion of
- formats. So if host is IEEE floating and target is VAX floating,
- or vice-versa, it loses. This means that we can't (yet) use these
- routines for extendeds. Extendeds are handled by
- REGISTER_CONVERTIBLE. What we want is to use floatformat.h, but that
- doesn't yet handle VAX floating at all.
+/* Extract a floating-point number from a target-order byte-stream at ADDR.
+ Returns the value as type DOUBLEST.
- 2. We can't deal with it if there is more than one floating point
- format in use. This has to be fixed at the unpack_double level.
+ 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. */
- 3. We probably should have a LONGEST_DOUBLE or DOUBLEST or whatever
- we want to call it which is long double where available. */
-
-double
+DOUBLEST
extract_floating (addr, len)
PTR addr;
int len;
{
+ DOUBLEST dretval;
+
if (len == sizeof (float))
{
- float retval;
- memcpy (&retval, addr, sizeof (retval));
- SWAP_FLOATING (&retval, sizeof (retval));
- return retval;
+ 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 == sizeof (double))
{
- double retval;
- memcpy (&retval, addr, sizeof (retval));
- SWAP_FLOATING (&retval, sizeof (retval));
- return retval;
+ 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 == sizeof (DOUBLEST))
+ {
+ 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 (addr, len, val)
PTR addr;
int len;
- double val;
+ DOUBLEST val;
{
if (len == sizeof (float))
{
- float floatval = val;
- SWAP_FLOATING (&floatval, sizeof (floatval));
- memcpy (addr, &floatval, sizeof (floatval));
+ 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 == sizeof (double))
{
- SWAP_FLOATING (&val, sizeof (val));
- memcpy (addr, &val, sizeof (val));
+ 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 == sizeof (DOUBLEST))
+ {
+ 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
{
struct frame_info *frame;
int regnum;
{
- struct frame_saved_regs saved_regs;
-
register struct frame_info *frame1 = NULL;
register CORE_ADDR addr = 0;
if (regnum != SP_REGNUM)
frame1 = frame;
- get_frame_saved_regs (frame1, &saved_regs);
- return saved_regs.regs[regnum]; /* ... which might be zero */
+ FRAME_INIT_SAVED_REGS (frame1);
+ return frame1->saved_regs[regnum]; /* ... which might be zero */
}
#endif /* HAVE_REGISTER_WINDOWS */
frame1 = get_prev_frame (frame1);
if (frame1 == 0 || frame1 == frame)
break;
- get_frame_saved_regs (frame1, &saved_regs);
- if (saved_regs.regs[regnum])
- addr = saved_regs.regs[regnum];
+ FRAME_INIT_SAVED_REGS (frame1);
+ if (frame1->saved_regs[regnum])
+ addr = frame1->saved_regs[regnum];
}
return addr;
if (raw_buffer != NULL)
{
/* Put it back in target format. */
- store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), addr);
+ store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), (LONGEST)addr);
}
if (addrp != NULL)
*addrp = 0;
}
#endif /* GET_SAVED_REGISTER. */
-/* Copy the bytes of register REGNUM, relative to the current stack frame,
+/* Copy the bytes of register REGNUM, relative to the input stack frame,
into our memory at MYADDR, in target byte order.
The number of bytes copied is REGISTER_RAW_SIZE (REGNUM).
Returns 1 if could not be read, 0 if could. */
int
-read_relative_register_raw_bytes (regnum, myaddr)
+read_relative_register_raw_bytes_for_frame (regnum, myaddr, frame)
int regnum;
char *myaddr;
+ struct frame_info *frame;
{
int optim;
- if (regnum == FP_REGNUM && selected_frame)
+ if (regnum == FP_REGNUM && frame)
{
- /* Put it back in target format. */
+ /* Put it back in target format. */
store_address (myaddr, REGISTER_RAW_SIZE(FP_REGNUM),
- FRAME_FP(selected_frame));
+ (LONGEST)FRAME_FP(frame));
+
return 0;
}
- get_saved_register (myaddr, &optim, (CORE_ADDR *) NULL, selected_frame,
+ get_saved_register (myaddr, &optim, (CORE_ADDR *) NULL, frame,
regnum, (enum lval_type *)NULL);
+
+ if (register_valid [regnum] < 0)
+ return 1; /* register value not available */
+
return optim;
}
+/* Copy the bytes of register REGNUM, relative to the current stack frame,
+ into our memory at MYADDR, in target byte order.
+ The number of bytes copied is REGISTER_RAW_SIZE (REGNUM).
+
+ Returns 1 if could not be read, 0 if could. */
+
+int
+read_relative_register_raw_bytes (regnum, myaddr)
+ int regnum;
+ char *myaddr;
+{
+ return read_relative_register_raw_bytes_for_frame (regnum, myaddr,
+ selected_frame);
+}
+
/* Return a `value' with the contents of register REGNUM
in its virtual format, with the type specified by
- REGISTER_VIRTUAL_TYPE. */
+ REGISTER_VIRTUAL_TYPE.
+
+ NOTE: returns NULL if register value is not available.
+ Caller will check return value or die! */
value_ptr
value_of_register (regnum)
get_saved_register (raw_buffer, &optim, &addr,
selected_frame, regnum, &lval);
+ if (register_valid[regnum] < 0)
+ return NULL; /* register value not available */
+
reg_val = allocate_value (REGISTER_VIRTUAL_TYPE (regnum));
/* Convert raw data to virtual format if necessary. */
}
else
#endif
- memcpy (VALUE_CONTENTS_RAW (reg_val), raw_buffer,
- REGISTER_RAW_SIZE (regnum));
+ if (REGISTER_RAW_SIZE (regnum) == REGISTER_VIRTUAL_SIZE (regnum))
+ memcpy (VALUE_CONTENTS_RAW (reg_val), raw_buffer,
+ REGISTER_RAW_SIZE (regnum));
+ else
+ fatal ("Register \"%s\" (%d) has conflicting raw (%d) and virtual (%d) size",
+ REGISTER_NAME (regnum), regnum,
+ REGISTER_RAW_SIZE (regnum), REGISTER_VIRTUAL_SIZE (regnum));
VALUE_LVAL (reg_val) = lval;
VALUE_ADDRESS (reg_val) = addr;
VALUE_REGNO (reg_val) = regnum;
the caller got the value from the last stop). */
/* Contents of the registers in target byte order.
- We allocate some extra slop since we do a lot of memcpy's around `registers',
- and failing-soft is better than failing hard. */
+ We allocate some extra slop since we do a lot of memcpy's around
+ `registers', and failing-soft is better than failing hard. */
+
char registers[REGISTER_BYTES + /* SLOP */ 256];
-/* Nonzero if that register has been fetched. */
-char register_valid[NUM_REGS];
+/* Nonzero if that register has been fetched,
+ -1 if register value not available. */
+SIGNED char register_valid[NUM_REGS];
/* The thread/process associated with the current set of registers. For now,
-1 is special, and means `no current process'. */
registers_pid = -1;
+ /* Force cleanup of any alloca areas if using C alloca instead of
+ a builtin alloca. This particular call is used to clean up
+ areas allocated by low level target code which may build up
+ during lengthy interactions between gdb and the target before
+ gdb gives control to the user (ie watchpoints). */
+ alloca (0);
+
for (i = 0; i < numregs; i++)
register_valid[i] = 0;
if (register_valid[regno])
continue;
+ if (REGISTER_NAME (regno) == NULL || *REGISTER_NAME (regno) == '\0')
+ continue;
+
regstart = REGISTER_BYTE (regno);
regend = regstart + REGISTER_RAW_SIZE (regno);
/* Write register REGNO at MYADDR to the target. MYADDR points at
REGISTER_RAW_BYTES(REGNO), which must be in target byte-order. */
-void
+static void
write_register_gen (regno, myaddr)
int regno;
char *myaddr;
if (!register_valid[regno])
target_fetch_registers (regno);
- return extract_address (®isters[REGISTER_BYTE (regno)],
- REGISTER_RAW_SIZE(regno));
+ return (CORE_ADDR)extract_address (®isters[REGISTER_BYTE (regno)],
+ REGISTER_RAW_SIZE(regno));
}
CORE_ADDR
return retval;
}
-/* Store VALUE, into the raw contents of register number REGNO. */
+/* Store VALUE, into the raw contents of register number REGNO.
+ This should probably write a LONGEST rather than a CORE_ADDR */
void
write_register (regno, val)
size = REGISTER_RAW_SIZE(regno);
buf = alloca (size);
- store_signed_integer (buf, size, (LONGEST) val);
+ store_signed_integer (buf, size, (LONGEST)val);
/* If we have a valid copy of the register, and new value == old value,
then don't bother doing the actual store. */
target_store_registers (regno);
}
-static void
+void
write_register_pid (regno, val, pid)
int regno;
- LONGEST val;
+ CORE_ADDR val;
int pid;
{
int save_pid;
/* Record that register REGNO contains VAL.
This is used when the value is obtained from the inferior or core dump,
- so there is no need to store the value there. */
+ so there is no need to store the value there.
+
+ If VAL is a NULL pointer, then it's probably an unsupported register. We
+ just set it's value to all zeros. We might want to record this fact, and
+ report it to the users of read_register and friends.
+*/
void
supply_register (regno, val)
int regno;
char *val;
{
+#if 1
if (registers_pid != inferior_pid)
{
registers_changed ();
registers_pid = inferior_pid;
}
+#endif
register_valid[regno] = 1;
- memcpy (®isters[REGISTER_BYTE (regno)], val, REGISTER_RAW_SIZE (regno));
+ if (val)
+ memcpy (®isters[REGISTER_BYTE (regno)], val, REGISTER_RAW_SIZE (regno));
+ else
+ memset (®isters[REGISTER_BYTE (regno)], '\000', REGISTER_RAW_SIZE (regno));
/* On some architectures, e.g. HPPA, there are a few stray bits in some
registers, that the rest of the code would like to ignore. */
Ditto for write_pc. */
CORE_ADDR
-read_pc ()
+read_pc_pid (pid)
+ int pid;
{
+ int saved_inferior_pid;
+ CORE_ADDR pc_val;
+
+ /* In case pid != inferior_pid. */
+ saved_inferior_pid = inferior_pid;
+ inferior_pid = pid;
+
#ifdef TARGET_READ_PC
- return TARGET_READ_PC (inferior_pid);
+ pc_val = TARGET_READ_PC (pid);
#else
- return ADDR_BITS_REMOVE ((CORE_ADDR) read_register_pid (PC_REGNUM, inferior_pid));
+ pc_val = ADDR_BITS_REMOVE ((CORE_ADDR) read_register_pid (PC_REGNUM, pid));
#endif
+
+ inferior_pid = saved_inferior_pid;
+ return pc_val;
}
CORE_ADDR
-read_pc_pid (pid)
- int pid;
+read_pc ()
{
-#ifdef TARGET_READ_PC
- return TARGET_READ_PC (pid);
-#else
- return ADDR_BITS_REMOVE ((CORE_ADDR) read_register_pid (PC_REGNUM, pid));
-#endif
+ return read_pc_pid (inferior_pid);
}
void
-write_pc (val)
- CORE_ADDR val;
+write_pc_pid (pc, pid)
+ CORE_ADDR pc;
+ int pid;
{
+ int saved_inferior_pid;
+
+ /* In case pid != inferior_pid. */
+ saved_inferior_pid = inferior_pid;
+ inferior_pid = pid;
+
#ifdef TARGET_WRITE_PC
- TARGET_WRITE_PC (val, inferior_pid);
+ TARGET_WRITE_PC (pc, pid);
#else
- write_register_pid (PC_REGNUM, val, inferior_pid);
+ write_register_pid (PC_REGNUM, pc, pid);
#ifdef NPC_REGNUM
- write_register_pid (NPC_REGNUM, val + 4, inferior_pid);
+ write_register_pid (NPC_REGNUM, pc + 4, pid);
#ifdef NNPC_REGNUM
- write_register_pid (NNPC_REGNUM, val + 8, inferior_pid);
+ write_register_pid (NNPC_REGNUM, pc + 8, pid);
#endif
#endif
#endif
+
+ inferior_pid = saved_inferior_pid;
}
void
-write_pc_pid (val, pid)
- CORE_ADDR val;
- int pid;
+write_pc (pc)
+ CORE_ADDR pc;
{
-#ifdef TARGET_WRITE_PC
- TARGET_WRITE_PC (val, pid);
-#else
- write_register_pid (PC_REGNUM, val, pid);
-#ifdef NPC_REGNUM
- write_register_pid (NPC_REGNUM, val + 4, pid);
-#ifdef NNPC_REGNUM
- write_register_pid (NNPC_REGNUM, val + 8, pid);
-#endif
-#endif
-#endif
+ write_pc_pid (pc, inferior_pid);
}
/* Cope with strage ways of getting to the stack and frame pointers */
case LOC_LOCAL_ARG:
case LOC_BASEREG:
case LOC_BASEREG_ARG:
+ case LOC_THREAD_LOCAL_STATIC:
return 1;
case LOC_UNDEF:
case LOC_CONST:
case LOC_STATIC:
+ case LOC_INDIRECT:
case LOC_TYPEDEF:
case LOC_LABEL:
case LOC_BLOCK:
case LOC_CONST_BYTES:
+ case LOC_UNRESOLVED:
case LOC_OPTIMIZED_OUT:
return 0;
}
v = allocate_value (type);
VALUE_LVAL (v) = lval_memory; /* The most likely possibility. */
+ VALUE_BFD_SECTION (v) = SYMBOL_BFD_SECTION (var);
+
len = TYPE_LENGTH (type);
if (frame == NULL) frame = selected_frame;
case LOC_LABEL:
/* Put the constant back in target format. */
- store_address (VALUE_CONTENTS_RAW (v), len, SYMBOL_VALUE_ADDRESS (var));
+ if (overlay_debugging)
+ store_address (VALUE_CONTENTS_RAW (v), len,
+ (LONGEST)symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (var),
+ SYMBOL_BFD_SECTION (var)));
+ else
+ store_address (VALUE_CONTENTS_RAW (v), len,
+ (LONGEST)SYMBOL_VALUE_ADDRESS (var));
VALUE_LVAL (v) = not_lval;
return v;
}
case LOC_STATIC:
+ if (overlay_debugging)
+ addr = symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (var),
+ SYMBOL_BFD_SECTION (var));
+ else
+ addr = SYMBOL_VALUE_ADDRESS (var);
+ 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 ("\
+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;
case LOC_ARG:
break;
}
+ case LOC_THREAD_LOCAL_STATIC:
+ {
+ char buf[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_TYPEDEF:
error ("Cannot look up value of a typedef");
break;
case LOC_BLOCK:
- VALUE_ADDRESS (v) = BLOCK_START (SYMBOL_BLOCK_VALUE (var));
+ if (overlay_debugging)
+ VALUE_ADDRESS (v) = symbol_overlayed_address
+ (BLOCK_START (SYMBOL_BLOCK_VALUE (var)), SYMBOL_BFD_SECTION (var));
+ else
+ VALUE_ADDRESS (v) = BLOCK_START (SYMBOL_BLOCK_VALUE (var));
return v;
case LOC_REGISTER:
case LOC_REGPARM_ADDR:
{
struct block *b;
+ int regno = SYMBOL_VALUE (var);
+ value_ptr regval;
if (frame == NULL)
return 0;
b = get_frame_block (frame);
-
if (SYMBOL_CLASS (var) == LOC_REGPARM_ADDR)
{
- addr =
- value_as_pointer (value_from_register (lookup_pointer_type (type),
- SYMBOL_VALUE (var),
- frame));
+ regval = value_from_register (lookup_pointer_type (type),
+ regno,
+ frame);
+
+ if (regval == NULL)
+ error ("Value of register variable not available.");
+
+ addr = value_as_pointer (regval);
VALUE_LVAL (v) = lval_memory;
}
else
- return value_from_register (type, SYMBOL_VALUE (var), frame);
+ {
+ regval = value_from_register (type, regno, frame);
+
+ if (regval == NULL)
+ error ("Value of register variable not available.");
+ return regval;
+ }
+ }
+ break;
+
+ case LOC_UNRESOLVED:
+ {
+ struct minimal_symbol *msym;
+
+ msym = lookup_minimal_symbol (SYMBOL_NAME (var), NULL, NULL);
+ if (msym == NULL)
+ return 0;
+ if (overlay_debugging)
+ addr = symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (msym),
+ SYMBOL_BFD_SECTION (msym));
+ else
+ addr = SYMBOL_VALUE_ADDRESS (msym);
}
break;
}
/* Return a value of type TYPE, stored in register REGNUM, in frame
- FRAME. */
+ FRAME.
+
+ NOTE: returns NULL if register value is not available.
+ Caller will check return value or die! */
value_ptr
value_from_register (type, regnum, frame)
CORE_ADDR addr;
int optim;
value_ptr v = allocate_value (type);
- int len = TYPE_LENGTH (type);
char *value_bytes = 0;
int value_bytes_copied = 0;
int num_storage_locs;
enum lval_type lval;
+ int len;
+
+ CHECK_TYPEDEF (type);
+ len = TYPE_LENGTH (type);
VALUE_REGNO (v) = regnum;
page_regnum,
&lval);
+ if (register_valid[page_regnum] == -1)
+ return NULL; /* register value not available */
+
if (lval == lval_register)
reg_stor++;
else
regnum,
&lval);
+ if (register_valid[regnum] == -1)
+ return NULL; /* register value not available */
+
if (lval == lval_register)
reg_stor++;
else
local_regnum,
&lval);
+ if (register_valid[local_regnum] == -1)
+ return NULL; /* register value not available */
+
if (regnum == local_regnum)
first_addr = addr;
if (lval == lval_register)
read the data in raw format. */
get_saved_register (raw_buffer, &optim, &addr, frame, regnum, &lval);
+
+ if (register_valid[regnum] == -1)
+ return NULL; /* register value not available */
+
VALUE_OPTIMIZED_OUT (v) = optim;
VALUE_LVAL (v) = lval;
VALUE_ADDRESS (v) = addr;
if (VALUE_LAZY (lazy_value)
|| TYPE_CODE (type) == TYPE_CODE_FUNC)
{
+ value_ptr val;
+
addr = VALUE_ADDRESS (lazy_value);
- return value_from_longest (lookup_pointer_type (type), (LONGEST) addr);
+ val = value_from_longest (lookup_pointer_type (type), (LONGEST) addr);
+ VALUE_BFD_SECTION (val) = VALUE_BFD_SECTION (lazy_value);
+ return val;
}
/* Not a memory address; check what the problem was. */
projects / deliverable / binutils-gdb.git / blobdiff