1 /* Find a variable's value in memory, for GDB, the GNU debugger.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
32 #include "gdb_string.h"
33 #include "gdb_assert.h"
34 #include "floatformat.h"
35 #include "symfile.h" /* for overlay functions */
37 #include "builtin-regs.h"
40 /* Basic byte-swapping routines. GDB has needed these for a long time...
41 All extract a target-format integer at ADDR which is LEN bytes long. */
43 #if TARGET_CHAR_BIT != 8 || HOST_CHAR_BIT != 8
44 /* 8 bit characters are a pretty safe assumption these days, so we
45 assume it throughout all these swapping routines. If we had to deal with
46 9 bit characters, we would need to make len be in bits and would have
47 to re-write these routines... */
52 extract_signed_integer (const void *addr
, int len
)
55 const unsigned char *p
;
56 const unsigned char *startaddr
= addr
;
57 const unsigned char *endaddr
= startaddr
+ len
;
59 if (len
> (int) sizeof (LONGEST
))
61 That operation is not available on integers of more than %d bytes.",
62 (int) sizeof (LONGEST
));
64 /* Start at the most significant end of the integer, and work towards
65 the least significant. */
66 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
69 /* Do the sign extension once at the start. */
70 retval
= ((LONGEST
) * p
^ 0x80) - 0x80;
71 for (++p
; p
< endaddr
; ++p
)
72 retval
= (retval
<< 8) | *p
;
77 /* Do the sign extension once at the start. */
78 retval
= ((LONGEST
) * p
^ 0x80) - 0x80;
79 for (--p
; p
>= startaddr
; --p
)
80 retval
= (retval
<< 8) | *p
;
86 extract_unsigned_integer (const void *addr
, int len
)
89 const unsigned char *p
;
90 const unsigned char *startaddr
= addr
;
91 const unsigned char *endaddr
= startaddr
+ len
;
93 if (len
> (int) sizeof (ULONGEST
))
95 That operation is not available on integers of more than %d bytes.",
96 (int) sizeof (ULONGEST
));
98 /* Start at the most significant end of the integer, and work towards
99 the least significant. */
101 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
103 for (p
= startaddr
; p
< endaddr
; ++p
)
104 retval
= (retval
<< 8) | *p
;
108 for (p
= endaddr
- 1; p
>= startaddr
; --p
)
109 retval
= (retval
<< 8) | *p
;
114 /* Sometimes a long long unsigned integer can be extracted as a
115 LONGEST value. This is done so that we can print these values
116 better. If this integer can be converted to a LONGEST, this
117 function returns 1 and sets *PVAL. Otherwise it returns 0. */
120 extract_long_unsigned_integer (const void *addr
, int orig_len
, LONGEST
*pval
)
122 char *p
, *first_addr
;
126 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
128 for (p
= (char *) addr
;
129 len
> (int) sizeof (LONGEST
) && p
< (char *) addr
+ orig_len
;
141 first_addr
= (char *) addr
;
142 for (p
= (char *) addr
+ orig_len
- 1;
143 len
> (int) sizeof (LONGEST
) && p
>= (char *) addr
;
153 if (len
<= (int) sizeof (LONGEST
))
155 *pval
= (LONGEST
) extract_unsigned_integer (first_addr
,
164 /* Treat the LEN bytes at ADDR as a target-format address, and return
165 that address. ADDR is a buffer in the GDB process, not in the
168 This function should only be used by target-specific code. It
169 assumes that a pointer has the same representation as that thing's
170 address represented as an integer. Some machines use word
171 addresses, or similarly munged things, for certain types of
172 pointers, so that assumption doesn't hold everywhere.
174 Common code should use extract_typed_address instead, or something
175 else based on POINTER_TO_ADDRESS. */
178 extract_address (const void *addr
, int len
)
180 /* Assume a CORE_ADDR can fit in a LONGEST (for now). Not sure
181 whether we want this to be true eventually. */
182 return (CORE_ADDR
) extract_unsigned_integer (addr
, len
);
186 /* Treat the bytes at BUF as a pointer of type TYPE, and return the
187 address it represents. */
189 extract_typed_address (const void *buf
, struct type
*type
)
191 if (TYPE_CODE (type
) != TYPE_CODE_PTR
192 && TYPE_CODE (type
) != TYPE_CODE_REF
)
193 internal_error (__FILE__
, __LINE__
,
194 "extract_typed_address: "
195 "type is not a pointer or reference");
197 return POINTER_TO_ADDRESS (type
, buf
);
202 store_signed_integer (void *addr
, int len
, LONGEST val
)
205 unsigned char *startaddr
= (unsigned char *) addr
;
206 unsigned char *endaddr
= startaddr
+ len
;
208 /* Start at the least significant end of the integer, and work towards
209 the most significant. */
210 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
212 for (p
= endaddr
- 1; p
>= startaddr
; --p
)
220 for (p
= startaddr
; p
< endaddr
; ++p
)
229 store_unsigned_integer (void *addr
, int len
, ULONGEST val
)
232 unsigned char *startaddr
= (unsigned char *) addr
;
233 unsigned char *endaddr
= startaddr
+ len
;
235 /* Start at the least significant end of the integer, and work towards
236 the most significant. */
237 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
239 for (p
= endaddr
- 1; p
>= startaddr
; --p
)
247 for (p
= startaddr
; p
< endaddr
; ++p
)
255 /* Store the address ADDR as a pointer of type TYPE at BUF, in target
258 store_typed_address (void *buf
, struct type
*type
, CORE_ADDR addr
)
260 if (TYPE_CODE (type
) != TYPE_CODE_PTR
261 && TYPE_CODE (type
) != TYPE_CODE_REF
)
262 internal_error (__FILE__
, __LINE__
,
263 "store_typed_address: "
264 "type is not a pointer or reference");
266 ADDRESS_TO_POINTER (type
, buf
, addr
);
271 /* Return a `value' with the contents of (virtual or cooked) register
272 REGNUM as found in the specified FRAME. The register's type is
273 determined by register_type().
275 NOTE: returns NULL if register value is not available. Caller will
276 check return value or die! */
279 value_of_register (int regnum
, struct frame_info
*frame
)
283 struct value
*reg_val
;
285 char raw_buffer
[MAX_REGISTER_SIZE
];
288 /* Builtin registers lie completly outside of the range of normal
289 registers. Catch them early so that the target never sees them. */
290 if (regnum
>= NUM_REGS
+ NUM_PSEUDO_REGS
)
291 return value_of_builtin_reg (regnum
, frame
);
293 frame_register (frame
, regnum
, &optim
, &lval
, &addr
, &realnum
, raw_buffer
);
295 /* FIXME: cagney/2002-05-15: This test is just bogus.
297 It indicates that the target failed to supply a value for a
298 register because it was "not available" at this time. Problem
299 is, the target still has the register and so get saved_register()
300 may be returning a value saved on the stack. */
302 if (register_cached (regnum
) < 0)
303 return NULL
; /* register value not available */
305 reg_val
= allocate_value (register_type (current_gdbarch
, regnum
));
307 /* Convert raw data to virtual format if necessary. */
309 if (REGISTER_CONVERTIBLE (regnum
))
311 REGISTER_CONVERT_TO_VIRTUAL (regnum
, register_type (current_gdbarch
, regnum
),
312 raw_buffer
, VALUE_CONTENTS_RAW (reg_val
));
314 else if (REGISTER_RAW_SIZE (regnum
) == REGISTER_VIRTUAL_SIZE (regnum
))
315 memcpy (VALUE_CONTENTS_RAW (reg_val
), raw_buffer
,
316 REGISTER_RAW_SIZE (regnum
));
318 internal_error (__FILE__
, __LINE__
,
319 "Register \"%s\" (%d) has conflicting raw (%d) and virtual (%d) size",
320 REGISTER_NAME (regnum
),
322 REGISTER_RAW_SIZE (regnum
),
323 REGISTER_VIRTUAL_SIZE (regnum
));
324 VALUE_LVAL (reg_val
) = lval
;
325 VALUE_ADDRESS (reg_val
) = addr
;
326 VALUE_REGNO (reg_val
) = regnum
;
327 VALUE_OPTIMIZED_OUT (reg_val
) = optim
;
331 /* Given a pointer of type TYPE in target form in BUF, return the
332 address it represents. */
334 unsigned_pointer_to_address (struct type
*type
, const void *buf
)
336 return extract_address (buf
, TYPE_LENGTH (type
));
340 signed_pointer_to_address (struct type
*type
, const void *buf
)
342 return extract_signed_integer (buf
, TYPE_LENGTH (type
));
345 /* Given an address, store it as a pointer of type TYPE in target
348 unsigned_address_to_pointer (struct type
*type
, void *buf
, CORE_ADDR addr
)
350 store_unsigned_integer (buf
, TYPE_LENGTH (type
), addr
);
354 address_to_signed_pointer (struct type
*type
, void *buf
, CORE_ADDR addr
)
356 store_signed_integer (buf
, TYPE_LENGTH (type
), addr
);
359 /* Will calling read_var_value or locate_var_value on SYM end
360 up caring what frame it is being evaluated relative to? SYM must
363 symbol_read_needs_frame (struct symbol
*sym
)
365 switch (SYMBOL_CLASS (sym
))
367 /* All cases listed explicitly so that gcc -Wall will detect it if
368 we failed to consider one. */
370 case LOC_COMPUTED_ARG
:
372 struct location_funcs
*symfuncs
= SYMBOL_LOCATION_FUNCS (sym
);
373 return (symfuncs
->read_needs_frame
) (sym
);
381 case LOC_REGPARM_ADDR
:
385 case LOC_BASEREG_ARG
:
386 case LOC_HP_THREAD_LOCAL_STATIC
:
396 /* Getting the address of a label can be done independently of the block,
397 even if some *uses* of that address wouldn't work so well without
401 case LOC_CONST_BYTES
:
403 case LOC_OPTIMIZED_OUT
:
409 /* Given a struct symbol for a variable,
410 and a stack frame id, read the value of the variable
411 and return a (pointer to a) struct value containing the value.
412 If the variable cannot be found, return a zero pointer.
413 If FRAME is NULL, use the deprecated_selected_frame. */
416 read_var_value (register struct symbol
*var
, struct frame_info
*frame
)
418 register struct value
*v
;
419 struct type
*type
= SYMBOL_TYPE (var
);
423 v
= allocate_value (type
);
424 VALUE_LVAL (v
) = lval_memory
; /* The most likely possibility. */
425 VALUE_BFD_SECTION (v
) = SYMBOL_BFD_SECTION (var
);
427 len
= TYPE_LENGTH (type
);
430 frame
= deprecated_selected_frame
;
432 switch (SYMBOL_CLASS (var
))
435 /* Put the constant back in target format. */
436 store_signed_integer (VALUE_CONTENTS_RAW (v
), len
,
437 (LONGEST
) SYMBOL_VALUE (var
));
438 VALUE_LVAL (v
) = not_lval
;
442 /* Put the constant back in target format. */
443 if (overlay_debugging
)
446 = symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (var
),
447 SYMBOL_BFD_SECTION (var
));
448 store_typed_address (VALUE_CONTENTS_RAW (v
), type
, addr
);
451 store_typed_address (VALUE_CONTENTS_RAW (v
), type
,
452 SYMBOL_VALUE_ADDRESS (var
));
453 VALUE_LVAL (v
) = not_lval
;
456 case LOC_CONST_BYTES
:
459 bytes_addr
= SYMBOL_VALUE_BYTES (var
);
460 memcpy (VALUE_CONTENTS_RAW (v
), bytes_addr
, len
);
461 VALUE_LVAL (v
) = not_lval
;
466 if (overlay_debugging
)
467 addr
= symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (var
),
468 SYMBOL_BFD_SECTION (var
));
470 addr
= SYMBOL_VALUE_ADDRESS (var
);
475 /* The import slot does not have a real address in it from the
476 dynamic loader (dld.sl on HP-UX), if the target hasn't
477 begun execution yet, so check for that. */
480 if (!target_has_execution
)
482 Attempt to access variable defined in different shared object or load module when\n\
483 addresses have not been bound by the dynamic loader. Try again when executable is running.");
485 locaddr
= SYMBOL_VALUE_ADDRESS (var
);
486 loc
= value_at (lookup_pointer_type (type
), locaddr
, NULL
);
487 addr
= value_as_address (loc
);
493 addr
= get_frame_args_address (frame
);
496 addr
+= SYMBOL_VALUE (var
);
505 argref
= get_frame_args_address (frame
);
508 argref
+= SYMBOL_VALUE (var
);
509 ref
= value_at (lookup_pointer_type (type
), argref
, NULL
);
510 addr
= value_as_address (ref
);
518 addr
= get_frame_locals_address (frame
);
519 addr
+= SYMBOL_VALUE (var
);
523 case LOC_BASEREG_ARG
:
524 case LOC_HP_THREAD_LOCAL_STATIC
:
526 struct value
*regval
;
528 regval
= value_from_register (lookup_pointer_type (type
),
529 SYMBOL_BASEREG (var
), frame
);
531 error ("Value of base register not available.");
532 addr
= value_as_address (regval
);
533 addr
+= SYMBOL_VALUE (var
);
537 case LOC_THREAD_LOCAL_STATIC
:
539 if (target_get_thread_local_address_p ())
540 addr
= target_get_thread_local_address (inferior_ptid
,
541 SYMBOL_OBJFILE (var
),
542 SYMBOL_VALUE_ADDRESS (var
));
543 /* It wouldn't be wrong here to try a gdbarch method, too;
544 finding TLS is an ABI-specific thing. But we don't do that
547 error ("Cannot find thread-local variables on this target");
552 error ("Cannot look up value of a typedef");
556 if (overlay_debugging
)
557 VALUE_ADDRESS (v
) = symbol_overlayed_address
558 (BLOCK_START (SYMBOL_BLOCK_VALUE (var
)), SYMBOL_BFD_SECTION (var
));
560 VALUE_ADDRESS (v
) = BLOCK_START (SYMBOL_BLOCK_VALUE (var
));
565 case LOC_REGPARM_ADDR
:
568 int regno
= SYMBOL_VALUE (var
);
569 struct value
*regval
;
573 b
= get_frame_block (frame
, 0);
575 if (SYMBOL_CLASS (var
) == LOC_REGPARM_ADDR
)
577 regval
= value_from_register (lookup_pointer_type (type
),
582 error ("Value of register variable not available.");
584 addr
= value_as_address (regval
);
585 VALUE_LVAL (v
) = lval_memory
;
589 regval
= value_from_register (type
, regno
, frame
);
592 error ("Value of register variable not available.");
599 case LOC_COMPUTED_ARG
:
601 struct location_funcs
*funcs
= SYMBOL_LOCATION_FUNCS (var
);
603 if (frame
== 0 && (funcs
->read_needs_frame
) (var
))
605 return (funcs
->read_variable
) (var
, frame
);
612 struct minimal_symbol
*msym
;
614 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (var
), NULL
, NULL
);
617 if (overlay_debugging
)
618 addr
= symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (msym
),
619 SYMBOL_BFD_SECTION (msym
));
621 addr
= SYMBOL_VALUE_ADDRESS (msym
);
625 case LOC_OPTIMIZED_OUT
:
626 VALUE_LVAL (v
) = not_lval
;
627 VALUE_OPTIMIZED_OUT (v
) = 1;
631 error ("Cannot look up value of a botched symbol.");
635 VALUE_ADDRESS (v
) = addr
;
640 /* Return a value of type TYPE, stored in register REGNUM, in frame
643 NOTE: returns NULL if register value is not available.
644 Caller will check return value or die! */
647 value_from_register (struct type
*type
, int regnum
, struct frame_info
*frame
)
649 char raw_buffer
[MAX_REGISTER_SIZE
];
652 struct value
*v
= allocate_value (type
);
653 char *value_bytes
= 0;
654 int value_bytes_copied
= 0;
655 int num_storage_locs
;
659 CHECK_TYPEDEF (type
);
660 len
= TYPE_LENGTH (type
);
662 VALUE_REGNO (v
) = regnum
;
664 num_storage_locs
= (len
> REGISTER_VIRTUAL_SIZE (regnum
) ?
665 ((len
- 1) / REGISTER_RAW_SIZE (regnum
)) + 1 :
668 if (num_storage_locs
> 1
670 // OBSOLETE #ifdef GDB_TARGET_IS_H8500
671 // OBSOLETE || TYPE_CODE (type) == TYPE_CODE_PTR
676 /* Value spread across multiple storage locations. */
679 int mem_stor
= 0, reg_stor
= 0;
680 int mem_tracking
= 1;
681 CORE_ADDR last_addr
= 0;
682 CORE_ADDR first_addr
= 0;
684 value_bytes
= (char *) alloca (len
+ MAX_REGISTER_SIZE
);
686 /* Copy all of the data out, whereever it may be. */
689 // OBSOLETE #ifdef GDB_TARGET_IS_H8500
690 // OBSOLETE /* This piece of hideosity is required because the H8500 treats registers
691 // OBSOLETE differently depending upon whether they are used as pointers or not. As a
692 // OBSOLETE pointer, a register needs to have a page register tacked onto the front.
693 // OBSOLETE An alternate way to do this would be to have gcc output different register
694 // OBSOLETE numbers for the pointer & non-pointer form of the register. But, it
695 // OBSOLETE doesn't, so we're stuck with this. */
697 // OBSOLETE if (TYPE_CODE (type) == TYPE_CODE_PTR
698 // OBSOLETE && len > 2)
700 // OBSOLETE int page_regnum;
702 // OBSOLETE switch (regnum)
704 // OBSOLETE case R0_REGNUM:
705 // OBSOLETE case R1_REGNUM:
706 // OBSOLETE case R2_REGNUM:
707 // OBSOLETE case R3_REGNUM:
708 // OBSOLETE page_regnum = SEG_D_REGNUM;
710 // OBSOLETE case R4_REGNUM:
711 // OBSOLETE case R5_REGNUM:
712 // OBSOLETE page_regnum = SEG_E_REGNUM;
714 // OBSOLETE case R6_REGNUM:
715 // OBSOLETE case R7_REGNUM:
716 // OBSOLETE page_regnum = SEG_T_REGNUM;
720 // OBSOLETE value_bytes[0] = 0;
721 // OBSOLETE get_saved_register (value_bytes + 1,
725 // OBSOLETE page_regnum,
728 // OBSOLETE if (register_cached (page_regnum) == -1)
729 // OBSOLETE return NULL; /* register value not available */
731 // OBSOLETE if (lval == lval_register)
732 // OBSOLETE reg_stor++;
734 // OBSOLETE mem_stor++;
735 // OBSOLETE first_addr = addr;
736 // OBSOLETE last_addr = addr;
738 // OBSOLETE get_saved_register (value_bytes + 2,
745 // OBSOLETE if (register_cached (regnum) == -1)
746 // OBSOLETE return NULL; /* register value not available */
748 // OBSOLETE if (lval == lval_register)
749 // OBSOLETE reg_stor++;
752 // OBSOLETE mem_stor++;
753 // OBSOLETE mem_tracking = mem_tracking && (addr == last_addr);
755 // OBSOLETE last_addr = addr;
758 // OBSOLETE #endif /* GDB_TARGET_IS_H8500 */
760 for (local_regnum
= regnum
;
761 value_bytes_copied
< len
;
762 (value_bytes_copied
+= REGISTER_RAW_SIZE (local_regnum
),
766 frame_register (frame
, local_regnum
, &optim
, &lval
, &addr
,
767 &realnum
, value_bytes
+ value_bytes_copied
);
769 if (register_cached (local_regnum
) == -1)
770 return NULL
; /* register value not available */
772 if (regnum
== local_regnum
)
774 if (lval
== lval_register
)
782 && (regnum
== local_regnum
783 || addr
== last_addr
));
788 if ((reg_stor
&& mem_stor
)
789 || (mem_stor
&& !mem_tracking
))
790 /* Mixed storage; all of the hassle we just went through was
791 for some good purpose. */
793 VALUE_LVAL (v
) = lval_reg_frame_relative
;
794 VALUE_FRAME (v
) = get_frame_base (frame
);
795 VALUE_FRAME_REGNUM (v
) = regnum
;
799 VALUE_LVAL (v
) = lval_memory
;
800 VALUE_ADDRESS (v
) = first_addr
;
804 VALUE_LVAL (v
) = lval_register
;
805 VALUE_ADDRESS (v
) = first_addr
;
808 internal_error (__FILE__
, __LINE__
,
809 "value_from_register: Value not stored anywhere!");
811 VALUE_OPTIMIZED_OUT (v
) = optim
;
813 /* Any structure stored in more than one register will always be
814 an integral number of registers. Otherwise, you'd need to do
815 some fiddling with the last register copied here for little
818 /* Copy into the contents section of the value. */
819 memcpy (VALUE_CONTENTS_RAW (v
), value_bytes
, len
);
821 /* Finally do any conversion necessary when extracting this
822 type from more than one register. */
823 #ifdef REGISTER_CONVERT_TO_TYPE
824 REGISTER_CONVERT_TO_TYPE (regnum
, type
, VALUE_CONTENTS_RAW (v
));
829 /* Data is completely contained within a single register. Locate the
830 register's contents in a real register or in core;
831 read the data in raw format. */
835 frame_register (frame
, regnum
, &optim
, &lval
, &addr
, &realnum
, raw_buffer
);
838 if (register_cached (regnum
) == -1)
839 return NULL
; /* register value not available */
841 VALUE_OPTIMIZED_OUT (v
) = optim
;
842 VALUE_LVAL (v
) = lval
;
843 VALUE_ADDRESS (v
) = addr
;
845 /* Convert the raw register to the corresponding data value's memory
846 format, if necessary. */
848 if (CONVERT_REGISTER_P (regnum
))
850 REGISTER_TO_VALUE (regnum
, type
, raw_buffer
, VALUE_CONTENTS_RAW (v
));
854 /* Raw and virtual formats are the same for this register. */
856 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
&& len
< REGISTER_RAW_SIZE (regnum
))
858 /* Big-endian, and we want less than full size. */
859 VALUE_OFFSET (v
) = REGISTER_RAW_SIZE (regnum
) - len
;
862 memcpy (VALUE_CONTENTS_RAW (v
), raw_buffer
+ VALUE_OFFSET (v
), len
);
868 /* Given a struct symbol for a variable or function,
869 and a stack frame id,
870 return a (pointer to a) struct value containing the properly typed
874 locate_var_value (register struct symbol
*var
, struct frame_info
*frame
)
877 struct type
*type
= SYMBOL_TYPE (var
);
878 struct value
*lazy_value
;
880 /* Evaluate it first; if the result is a memory address, we're fine.
881 Lazy evaluation pays off here. */
883 lazy_value
= read_var_value (var
, frame
);
885 error ("Address of \"%s\" is unknown.", SYMBOL_PRINT_NAME (var
));
887 if (VALUE_LAZY (lazy_value
)
888 || TYPE_CODE (type
) == TYPE_CODE_FUNC
)
892 addr
= VALUE_ADDRESS (lazy_value
);
893 val
= value_from_pointer (lookup_pointer_type (type
), addr
);
894 VALUE_BFD_SECTION (val
) = VALUE_BFD_SECTION (lazy_value
);
898 /* Not a memory address; check what the problem was. */
899 switch (VALUE_LVAL (lazy_value
))
902 gdb_assert (REGISTER_NAME (VALUE_REGNO (lazy_value
)) != NULL
903 && *REGISTER_NAME (VALUE_REGNO (lazy_value
)) != '\0');
904 error("Address requested for identifier "
905 "\"%s\" which is in register $%s",
906 SYMBOL_PRINT_NAME (var
),
907 REGISTER_NAME (VALUE_REGNO (lazy_value
)));
910 case lval_reg_frame_relative
:
911 gdb_assert (REGISTER_NAME (VALUE_FRAME_REGNUM (lazy_value
)) != NULL
912 && *REGISTER_NAME (VALUE_FRAME_REGNUM (lazy_value
)) != '\0');
913 error("Address requested for identifier "
914 "\"%s\" which is in frame register $%s",
915 SYMBOL_PRINT_NAME (var
),
916 REGISTER_NAME (VALUE_FRAME_REGNUM (lazy_value
)));
920 error ("Can't take address of \"%s\" which isn't an lvalue.",
921 SYMBOL_PRINT_NAME (var
));
924 return 0; /* For lint -- never reached */