1 /* Target-dependent code for the Fujitsu FR-V, for GDB, the GNU Debugger.
2 Copyright 2002, 2003 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
23 #include "symfile.h" /* for entry_point_address */
25 #include "arch-utils.h"
28 extern void _initialize_frv_tdep (void);
30 static gdbarch_init_ftype frv_gdbarch_init
;
32 static gdbarch_register_name_ftype frv_register_name
;
33 static gdbarch_register_raw_size_ftype frv_register_raw_size
;
34 static gdbarch_register_virtual_size_ftype frv_register_virtual_size
;
35 static gdbarch_register_virtual_type_ftype frv_register_virtual_type
;
36 static gdbarch_register_byte_ftype frv_register_byte
;
37 static gdbarch_breakpoint_from_pc_ftype frv_breakpoint_from_pc
;
38 static gdbarch_frame_chain_ftype frv_frame_chain
;
39 static gdbarch_frame_saved_pc_ftype frv_frame_saved_pc
;
40 static gdbarch_skip_prologue_ftype frv_skip_prologue
;
41 static gdbarch_deprecated_extract_return_value_ftype frv_extract_return_value
;
42 static gdbarch_deprecated_extract_struct_value_address_ftype frv_extract_struct_value_address
;
43 static gdbarch_use_struct_convention_ftype frv_use_struct_convention
;
44 static gdbarch_frameless_function_invocation_ftype frv_frameless_function_invocation
;
45 static gdbarch_init_extra_frame_info_ftype stupid_useless_init_extra_frame_info
;
46 static gdbarch_store_struct_return_ftype frv_store_struct_return
;
47 static gdbarch_push_arguments_ftype frv_push_arguments
;
48 static gdbarch_push_return_address_ftype frv_push_return_address
;
49 static gdbarch_pop_frame_ftype frv_pop_frame
;
50 static gdbarch_saved_pc_after_call_ftype frv_saved_pc_after_call
;
52 static void frv_pop_frame_regular (struct frame_info
*frame
);
54 /* Register numbers. You can change these as needed, but don't forget
55 to update the simulator accordingly. */
57 /* The total number of registers we know exist. */
60 /* Register numbers 0 -- 63 are always reserved for general-purpose
61 registers. The chip at hand may have less. */
65 struct_return_regnum
= 3,
68 /* Register numbers 64 -- 127 are always reserved for floating-point
69 registers. The chip at hand may have less. */
70 first_fpr_regnum
= 64,
71 last_fpr_regnum
= 127,
73 /* Register numbers 128 on up are always reserved for special-purpose
75 first_spr_regnum
= 128,
91 static LONGEST frv_call_dummy_words
[] =
95 /* The contents of this structure can only be trusted after we've
96 frv_frame_init_saved_regs on the frame. */
97 struct frame_extra_info
99 /* The offset from our frame pointer to our caller's stack
101 int fp_to_callers_sp_offset
;
103 /* Non-zero if we've saved our return address on the stack yet.
104 Zero if it's still sitting in the link register. */
105 int lr_saved_on_stack
;
109 /* A structure describing a particular variant of the FRV.
110 We allocate and initialize one of these structures when we create
111 the gdbarch object for a variant.
113 At the moment, all the FR variants we support differ only in which
114 registers are present; the portable code of GDB knows that
115 registers whose names are the empty string don't exist, so the
116 `register_names' array captures all the per-variant information we
119 in the future, if we need to have per-variant maps for raw size,
120 virtual type, etc., we should replace register_names with an array
121 of structures, each of which gives all the necessary info for one
122 register. Don't stick parallel arrays in here --- that's so
126 /* How many general-purpose registers does this variant have? */
129 /* How many floating-point registers does this variant have? */
132 /* How many hardware watchpoints can it support? */
133 int num_hw_watchpoints
;
135 /* How many hardware breakpoints can it support? */
136 int num_hw_breakpoints
;
138 /* Register names. */
139 char **register_names
;
142 #define CURRENT_VARIANT (gdbarch_tdep (current_gdbarch))
145 /* Allocate a new variant structure, and set up default values for all
147 static struct gdbarch_tdep
*
150 struct gdbarch_tdep
*var
;
154 var
= xmalloc (sizeof (*var
));
155 memset (var
, 0, sizeof (*var
));
159 var
->num_hw_watchpoints
= 0;
160 var
->num_hw_breakpoints
= 0;
162 /* By default, don't supply any general-purpose or floating-point
164 var
->register_names
= (char **) xmalloc (frv_num_regs
* sizeof (char *));
165 for (r
= 0; r
< frv_num_regs
; r
++)
166 var
->register_names
[r
] = "";
168 /* Do, however, supply default names for the special-purpose
170 for (r
= first_spr_regnum
; r
<= last_spr_regnum
; ++r
)
172 sprintf (buf
, "x%d", r
);
173 var
->register_names
[r
] = xstrdup (buf
);
176 var
->register_names
[pc_regnum
] = "pc";
177 var
->register_names
[lr_regnum
] = "lr";
178 var
->register_names
[lcr_regnum
] = "lcr";
180 var
->register_names
[psr_regnum
] = "psr";
181 var
->register_names
[ccr_regnum
] = "ccr";
182 var
->register_names
[cccr_regnum
] = "cccr";
183 var
->register_names
[tbr_regnum
] = "tbr";
185 /* Debug registers. */
186 var
->register_names
[brr_regnum
] = "brr";
187 var
->register_names
[dbar0_regnum
] = "dbar0";
188 var
->register_names
[dbar1_regnum
] = "dbar1";
189 var
->register_names
[dbar2_regnum
] = "dbar2";
190 var
->register_names
[dbar3_regnum
] = "dbar3";
196 /* Indicate that the variant VAR has NUM_GPRS general-purpose
197 registers, and fill in the names array appropriately. */
199 set_variant_num_gprs (struct gdbarch_tdep
*var
, int num_gprs
)
203 var
->num_gprs
= num_gprs
;
205 for (r
= 0; r
< num_gprs
; ++r
)
209 sprintf (buf
, "gr%d", r
);
210 var
->register_names
[first_gpr_regnum
+ r
] = xstrdup (buf
);
215 /* Indicate that the variant VAR has NUM_FPRS floating-point
216 registers, and fill in the names array appropriately. */
218 set_variant_num_fprs (struct gdbarch_tdep
*var
, int num_fprs
)
222 var
->num_fprs
= num_fprs
;
224 for (r
= 0; r
< num_fprs
; ++r
)
228 sprintf (buf
, "fr%d", r
);
229 var
->register_names
[first_fpr_regnum
+ r
] = xstrdup (buf
);
235 frv_register_name (int reg
)
239 if (reg
>= frv_num_regs
)
242 return CURRENT_VARIANT
->register_names
[reg
];
247 frv_register_raw_size (int reg
)
253 frv_register_virtual_size (int reg
)
259 frv_register_virtual_type (int reg
)
261 if (reg
>= 64 && reg
<= 127)
262 return builtin_type_float
;
264 return builtin_type_int
;
268 frv_register_byte (int reg
)
273 static const unsigned char *
274 frv_breakpoint_from_pc (CORE_ADDR
*pcptr
, int *lenp
)
276 static unsigned char breakpoint
[] = {0xc0, 0x70, 0x00, 0x01};
277 *lenp
= sizeof (breakpoint
);
282 frv_frame_chain (struct frame_info
*frame
)
284 CORE_ADDR saved_fp_addr
;
286 if (frame
->saved_regs
&& frame
->saved_regs
[fp_regnum
] != 0)
287 saved_fp_addr
= frame
->saved_regs
[fp_regnum
];
289 /* Just assume it was saved in the usual place. */
290 saved_fp_addr
= frame
->frame
;
292 return read_memory_integer (saved_fp_addr
, 4);
296 frv_frame_saved_pc (struct frame_info
*frame
)
298 frv_frame_init_saved_regs (frame
);
300 /* Perhaps the prologue analyzer recorded where it was stored.
301 (As of 14 Oct 2001, it never does.) */
302 if (frame
->saved_regs
&& frame
->saved_regs
[pc_regnum
] != 0)
303 return read_memory_integer (frame
->saved_regs
[pc_regnum
], 4);
305 /* If the prologue analyzer tells us the link register was saved on
306 the stack, get it from there. */
307 if (frame
->extra_info
->lr_saved_on_stack
)
308 return read_memory_integer (frame
->frame
+ 8, 4);
310 /* Otherwise, it's still in LR.
311 However, if FRAME isn't the youngest frame, this is kind of
312 suspicious --- if this frame called somebody else, then its LR
313 has certainly been overwritten. */
315 return read_register (lr_regnum
);
317 /* By default, assume it's saved in the standard place, relative to
318 the frame pointer. */
319 return read_memory_integer (frame
->frame
+ 8, 4);
323 /* Return true if REG is a caller-saves ("scratch") register,
326 is_caller_saves_reg (int reg
)
328 return ((4 <= reg
&& reg
<= 7)
329 || (14 <= reg
&& reg
<= 15)
330 || (32 <= reg
&& reg
<= 47));
334 /* Return true if REG is a callee-saves register, false otherwise. */
336 is_callee_saves_reg (int reg
)
338 return ((16 <= reg
&& reg
<= 31)
339 || (48 <= reg
&& reg
<= 63));
343 /* Return true if REG is an argument register, false otherwise. */
345 is_argument_reg (int reg
)
347 return (8 <= reg
&& reg
<= 13);
351 /* Scan an FR-V prologue, starting at PC, until frame->PC.
352 If FRAME is non-zero, fill in its saved_regs with appropriate addresses.
353 We assume FRAME's saved_regs array has already been allocated and cleared.
354 Return the first PC value after the prologue.
356 Note that, for unoptimized code, we almost don't need this function
357 at all; all arguments and locals live on the stack, so we just need
358 the FP to find everything. The catch: structures passed by value
359 have their addresses living in registers; they're never spilled to
360 the stack. So if you ever want to be able to get to these
361 arguments in any frame but the top, you'll need to do this serious
362 prologue analysis. */
364 frv_analyze_prologue (CORE_ADDR pc
, struct frame_info
*frame
)
366 /* When writing out instruction bitpatterns, we use the following
367 letters to label instruction fields:
368 P - The parallel bit. We don't use this.
369 J - The register number of GRj in the instruction description.
370 K - The register number of GRk in the instruction description.
371 I - The register number of GRi.
372 S - a signed imediate offset.
373 U - an unsigned immediate offset.
375 The dots below the numbers indicate where hex digit boundaries
376 fall, to make it easier to check the numbers. */
378 /* Non-zero iff we've seen the instruction that initializes the
379 frame pointer for this function's frame. */
382 /* If fp_set is non_zero, then this is the distance from
383 the stack pointer to frame pointer: fp = sp + fp_offset. */
386 /* Total size of frame prior to any alloca operations. */
389 /* The number of the general-purpose register we saved the return
390 address ("link register") in, or -1 if we haven't moved it yet. */
391 int lr_save_reg
= -1;
393 /* Non-zero iff we've saved the LR onto the stack. */
394 int lr_saved_on_stack
= 0;
396 /* If gr_saved[i] is non-zero, then we've noticed that general
397 register i has been saved at gr_sp_offset[i] from the stack
400 int gr_sp_offset
[64];
402 memset (gr_saved
, 0, sizeof (gr_saved
));
404 while (! frame
|| pc
< frame
->pc
)
406 LONGEST op
= read_memory_integer (pc
, 4);
408 /* The tests in this chain of ifs should be in order of
409 decreasing selectivity, so that more particular patterns get
410 to fire before less particular patterns. */
412 /* Setting the FP from the SP:
414 P 000010 0100010 000001 000000000000 = 0x04881000
415 0 111111 1111111 111111 111111111111 = 0x7fffffff
417 We treat this as part of the prologue. */
418 if ((op
& 0x7fffffff) == 0x04881000)
424 /* Move the link register to the scratch register grJ, before saving:
426 P 000100 0000011 010000 000111 JJJJJJ = 0x080d01c0
427 0 111111 1111111 111111 111111 000000 = 0x7fffffc0
429 We treat this as part of the prologue. */
430 else if ((op
& 0x7fffffc0) == 0x080d01c0)
432 int gr_j
= op
& 0x3f;
434 /* If we're moving it to a scratch register, that's fine. */
435 if (is_caller_saves_reg (gr_j
))
437 /* Otherwise it's not a prologue instruction that we
443 /* To save multiple callee-saves registers on the stack, at
447 P KKKKKK 0000011 000001 000011 000000 = 0x000c10c0
448 0 000000 1111111 111111 111111 111111 = 0x01ffffff
451 P KKKKKK 0000011 000001 000100 000000 = 0x000c1100
452 0 000000 1111111 111111 111111 111111 = 0x01ffffff
454 We treat this as part of the prologue, and record the register's
455 saved address in the frame structure. */
456 else if ((op
& 0x01ffffff) == 0x000c10c0
457 || (op
& 0x01ffffff) == 0x000c1100)
459 int gr_k
= ((op
>> 25) & 0x3f);
460 int ope
= ((op
>> 6) & 0x3f);
464 /* Is it an std or an stq? */
470 /* Is it really a callee-saves register? */
471 if (is_callee_saves_reg (gr_k
))
473 for (i
= 0; i
< count
; i
++)
475 gr_saved
[gr_k
+ i
] = 1;
476 gr_sp_offset
[gr_k
+ i
] = 4 * i
;
480 /* It's not a prologue instruction. */
484 /* Adjusting the stack pointer. (The stack pointer is GR1.)
486 P 000001 0010000 000001 SSSSSSSSSSSS = 0x02401000
487 0 111111 1111111 111111 000000000000 = 0x7ffff000
489 We treat this as part of the prologue. */
490 else if ((op
& 0x7ffff000) == 0x02401000)
492 /* Sign-extend the twelve-bit field.
493 (Isn't there a better way to do this?) */
494 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
499 /* Setting the FP to a constant distance from the SP:
501 P 000010 0010000 000001 SSSSSSSSSSSS = 0x04401000
502 0 111111 1111111 111111 000000000000 = 0x7ffff000
504 We treat this as part of the prologue. */
505 else if ((op
& 0x7ffff000) == 0x04401000)
507 /* Sign-extend the twelve-bit field.
508 (Isn't there a better way to do this?) */
509 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
514 /* To spill an argument register to a scratch register:
516 P KKKKKK 0100010 IIIIII 000000000000 = 0x00880000
517 0 000000 1111111 000000 111111111111 = 0x01fc0fff
519 For the time being, we treat this as a prologue instruction,
520 assuming that GRi is an argument register. This one's kind
521 of suspicious, because it seems like it could be part of a
522 legitimate body instruction. But we only come here when the
523 source info wasn't helpful, so we have to do the best we can.
524 Hopefully once GCC and GDB agree on how to emit line number
525 info for prologues, then this code will never come into play. */
526 else if ((op
& 0x01fc0fff) == 0x00880000)
528 int gr_i
= ((op
>> 12) & 0x3f);
530 /* If the source isn't an arg register, then this isn't a
531 prologue instruction. */
532 if (! is_argument_reg (gr_i
))
536 /* To spill 16-bit values to the stack:
538 P KKKKKK 1010001 000010 SSSSSSSSSSSS = 0x01442000
539 0 000000 1111111 111111 000000000000 = 0x01fff000
541 And for 8-bit values, we use STB instructions.
543 P KKKKKK 1010000 000010 SSSSSSSSSSSS = 0x01402000
544 0 000000 1111111 111111 000000000000 = 0x01fff000
546 We check that GRk is really an argument register, and treat
547 all such as part of the prologue. */
548 else if ( (op
& 0x01fff000) == 0x01442000
549 || (op
& 0x01fff000) == 0x01402000)
551 int gr_k
= ((op
>> 25) & 0x3f);
553 if (! is_argument_reg (gr_k
))
554 break; /* Source isn't an arg register. */
557 /* To save multiple callee-saves register on the stack, at a
561 P KKKKKK 1010011 000001 SSSSSSSSSSSS = 0x014c1000
562 0 000000 1111111 111111 000000000000 = 0x01fff000
565 P KKKKKK 1010100 000001 SSSSSSSSSSSS = 0x01501000
566 0 000000 1111111 111111 000000000000 = 0x01fff000
568 We treat this as part of the prologue, and record the register's
569 saved address in the frame structure. */
570 else if ((op
& 0x01fff000) == 0x014c1000
571 || (op
& 0x01fff000) == 0x01501000)
573 int gr_k
= ((op
>> 25) & 0x3f);
577 /* Is it a stdi or a stqi? */
578 if ((op
& 0x01fff000) == 0x014c1000)
583 /* Is it really a callee-saves register? */
584 if (is_callee_saves_reg (gr_k
))
586 /* Sign-extend the twelve-bit field.
587 (Isn't there a better way to do this?) */
588 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
590 for (i
= 0; i
< count
; i
++)
592 gr_saved
[gr_k
+ i
] = 1;
593 gr_sp_offset
[gr_k
+ i
] = s
+ (4 * i
);
597 /* It's not a prologue instruction. */
601 /* Storing any kind of integer register at any constant offset
602 from any other register.
605 P KKKKKK 0000011 IIIIII 000010 000000 = 0x000c0080
606 0 000000 1111111 000000 111111 111111 = 0x01fc0fff
609 P KKKKKK 1010010 IIIIII SSSSSSSSSSSS = 0x01480000
610 0 000000 1111111 000000 000000000000 = 0x01fc0000
612 These could be almost anything, but a lot of prologue
613 instructions fall into this pattern, so let's decode the
614 instruction once, and then work at a higher level. */
615 else if (((op
& 0x01fc0fff) == 0x000c0080)
616 || ((op
& 0x01fc0000) == 0x01480000))
618 int gr_k
= ((op
>> 25) & 0x3f);
619 int gr_i
= ((op
>> 12) & 0x3f);
622 /* Are we storing with gr0 as an offset, or using an
624 if ((op
& 0x01fc0fff) == 0x000c0080)
627 offset
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
629 /* If the address isn't relative to the SP or FP, it's not a
630 prologue instruction. */
631 if (gr_i
!= sp_regnum
&& gr_i
!= fp_regnum
)
634 /* Saving the old FP in the new frame (relative to the SP). */
635 if (gr_k
== fp_regnum
&& gr_i
== sp_regnum
)
638 /* Saving callee-saves register(s) on the stack, relative to
640 else if (gr_i
== sp_regnum
641 && is_callee_saves_reg (gr_k
))
644 gr_sp_offset
[gr_k
] = offset
;
647 /* Saving the scratch register holding the return address. */
648 else if (lr_save_reg
!= -1
649 && gr_k
== lr_save_reg
)
650 lr_saved_on_stack
= 1;
652 /* Spilling int-sized arguments to the stack. */
653 else if (is_argument_reg (gr_k
))
656 /* It's not a store instruction we recognize, so this must
657 be the end of the prologue. */
662 /* It's not any instruction we recognize, so this must be the end
672 frame
->extra_info
->lr_saved_on_stack
= lr_saved_on_stack
;
674 /* If we know the relationship between the stack and frame
675 pointers, record the addresses of the registers we noticed.
676 Note that we have to do this as a separate step at the end,
677 because instructions may save relative to the SP, but we need
678 their addresses relative to the FP. */
683 for (i
= 0; i
< 64; i
++)
685 frame
->saved_regs
[i
] = (frame
->frame
686 - fp_offset
+ gr_sp_offset
[i
]);
688 frame
->extra_info
->fp_to_callers_sp_offset
= framesize
- fp_offset
;
697 frv_skip_prologue (CORE_ADDR pc
)
699 CORE_ADDR func_addr
, func_end
, new_pc
;
703 /* If the line table has entry for a line *within* the function
704 (i.e., not in the prologue, and not past the end), then that's
706 if (find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
708 struct symtab_and_line sal
;
710 sal
= find_pc_line (func_addr
, 0);
712 if (sal
.line
!= 0 && sal
.end
< func_end
)
718 /* The FR-V prologue is at least five instructions long (twenty bytes).
719 If we didn't find a real source location past that, then
720 do a full analysis of the prologue. */
721 if (new_pc
< pc
+ 20)
722 new_pc
= frv_analyze_prologue (pc
, 0);
728 frv_frame_init_saved_regs (struct frame_info
*frame
)
730 if (frame
->saved_regs
)
733 frame_saved_regs_zalloc (frame
);
734 frame
->saved_regs
[fp_regnum
] = frame
->frame
;
736 /* Find the beginning of this function, so we can analyze its
739 CORE_ADDR func_addr
, func_end
;
741 if (find_pc_partial_function (frame
->pc
, NULL
, &func_addr
, &func_end
))
742 frv_analyze_prologue (func_addr
, frame
);
746 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
747 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
748 and TYPE is the type (which is known to be struct, union or array).
750 The frv returns all structs in memory. */
753 frv_use_struct_convention (int gcc_p
, struct type
*type
)
759 frv_extract_return_value (struct type
*type
, char *regbuf
, char *valbuf
)
761 memcpy (valbuf
, (regbuf
762 + frv_register_byte (8)
763 + (TYPE_LENGTH (type
) < 4 ? 4 - TYPE_LENGTH (type
) : 0)),
768 frv_extract_struct_value_address (char *regbuf
)
770 return extract_address (regbuf
+ frv_register_byte (struct_return_regnum
),
775 frv_store_struct_return (CORE_ADDR addr
, CORE_ADDR sp
)
777 write_register (struct_return_regnum
, addr
);
781 frv_frameless_function_invocation (struct frame_info
*frame
)
783 return frameless_look_for_prologue (frame
);
787 frv_saved_pc_after_call (struct frame_info
*frame
)
789 return read_register (lr_regnum
);
793 frv_init_extra_frame_info (int fromleaf
, struct frame_info
*frame
)
795 frame_extra_info_zalloc (frame
, sizeof (struct frame_extra_info
));
796 frame
->extra_info
->fp_to_callers_sp_offset
= 0;
797 frame
->extra_info
->lr_saved_on_stack
= 0;
800 #define ROUND_UP(n,a) (((n)+(a)-1) & ~((a)-1))
801 #define ROUND_DOWN(n,a) ((n) & ~((a)-1))
804 frv_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
805 int struct_return
, CORE_ADDR struct_addr
)
812 struct type
*arg_type
;
814 enum type_code typecode
;
820 printf("Push %d args at sp = %x, struct_return=%d (%x)\n",
821 nargs
, (int) sp
, struct_return
, struct_addr
);
825 for (argnum
= 0; argnum
< nargs
; ++argnum
)
826 stack_space
+= ROUND_UP (TYPE_LENGTH (VALUE_TYPE (args
[argnum
])), 4);
828 stack_space
-= (6 * 4);
832 /* Make sure stack is dword aligned. */
833 sp
= ROUND_DOWN (sp
, 8);
840 write_register (struct_return_regnum
, struct_addr
);
842 for (argnum
= 0; argnum
< nargs
; ++argnum
)
845 arg_type
= check_typedef (VALUE_TYPE (arg
));
846 len
= TYPE_LENGTH (arg_type
);
847 typecode
= TYPE_CODE (arg_type
);
849 if (typecode
== TYPE_CODE_STRUCT
|| typecode
== TYPE_CODE_UNION
)
851 store_address (valbuf
, 4, VALUE_ADDRESS (arg
));
852 typecode
= TYPE_CODE_PTR
;
858 val
= (char *) VALUE_CONTENTS (arg
);
863 int partial_len
= (len
< 4 ? len
: 4);
867 regval
= extract_address (val
, partial_len
);
869 printf(" Argnum %d data %x -> reg %d\n",
870 argnum
, (int) regval
, argreg
);
872 write_register (argreg
, regval
);
878 printf(" Argnum %d data %x -> offset %d (%x)\n",
879 argnum
, *((int *)val
), stack_offset
, (int) (sp
+ stack_offset
));
881 write_memory (sp
+ stack_offset
, val
, partial_len
);
882 stack_offset
+= ROUND_UP(partial_len
, 4);
892 frv_push_return_address (CORE_ADDR pc
, CORE_ADDR sp
)
894 write_register (lr_regnum
, CALL_DUMMY_ADDRESS ());
899 frv_store_return_value (struct type
*type
, char *valbuf
)
901 int length
= TYPE_LENGTH (type
);
902 int reg8_offset
= frv_register_byte (8);
905 deprecated_write_register_bytes (reg8_offset
+ (4 - length
), valbuf
,
907 else if (length
== 8)
908 deprecated_write_register_bytes (reg8_offset
, valbuf
, length
);
910 internal_error (__FILE__
, __LINE__
,
911 "Don't know how to return a %d-byte value.", length
);
917 generic_pop_current_frame (frv_pop_frame_regular
);
921 frv_pop_frame_regular (struct frame_info
*frame
)
928 frv_frame_init_saved_regs (frame
);
930 write_register (pc_regnum
, frv_frame_saved_pc (frame
));
931 for (regno
= 0; regno
< frv_num_regs
; ++regno
)
933 if (frame
->saved_regs
[regno
]
934 && regno
!= pc_regnum
935 && regno
!= sp_regnum
)
937 write_register (regno
,
938 read_memory_integer (frame
->saved_regs
[regno
], 4));
941 write_register (sp_regnum
, fp
+ frame
->extra_info
->fp_to_callers_sp_offset
);
942 flush_cached_frames ();
947 frv_remote_translate_xfer_address (CORE_ADDR memaddr
, int nr_bytes
,
948 CORE_ADDR
*targ_addr
, int *targ_len
)
950 *targ_addr
= memaddr
;
951 *targ_len
= nr_bytes
;
955 /* Hardware watchpoint / breakpoint support for the FR500
959 frv_check_watch_resources (int type
, int cnt
, int ot
)
961 struct gdbarch_tdep
*var
= CURRENT_VARIANT
;
963 /* Watchpoints not supported on simulator. */
964 if (strcmp (target_shortname
, "sim") == 0)
967 if (type
== bp_hardware_breakpoint
)
969 if (var
->num_hw_breakpoints
== 0)
971 else if (cnt
<= var
->num_hw_breakpoints
)
976 if (var
->num_hw_watchpoints
== 0)
980 else if (cnt
<= var
->num_hw_watchpoints
)
988 frv_stopped_data_address (void)
990 CORE_ADDR brr
, dbar0
, dbar1
, dbar2
, dbar3
;
992 brr
= read_register (brr_regnum
);
993 dbar0
= read_register (dbar0_regnum
);
994 dbar1
= read_register (dbar1_regnum
);
995 dbar2
= read_register (dbar2_regnum
);
996 dbar3
= read_register (dbar3_regnum
);
1000 else if (brr
& (1<<10))
1002 else if (brr
& (1<<9))
1004 else if (brr
& (1<<8))
1010 static struct gdbarch
*
1011 frv_gdbarch_init (struct gdbarch_info info
, struct gdbarch_list
*arches
)
1013 struct gdbarch
*gdbarch
;
1014 struct gdbarch_tdep
*var
;
1016 /* Check to see if we've already built an appropriate architecture
1017 object for this executable. */
1018 arches
= gdbarch_list_lookup_by_info (arches
, &info
);
1020 return arches
->gdbarch
;
1022 /* Select the right tdep structure for this variant. */
1023 var
= new_variant ();
1024 switch (info
.bfd_arch_info
->mach
)
1027 case bfd_mach_frvsimple
:
1028 case bfd_mach_fr500
:
1029 case bfd_mach_frvtomcat
:
1030 set_variant_num_gprs (var
, 64);
1031 set_variant_num_fprs (var
, 64);
1034 case bfd_mach_fr400
:
1035 set_variant_num_gprs (var
, 32);
1036 set_variant_num_fprs (var
, 32);
1040 /* Never heard of this variant. */
1044 gdbarch
= gdbarch_alloc (&info
, var
);
1046 /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
1047 ready to unwind the PC first (see frame.c:get_prev_frame()). */
1048 set_gdbarch_deprecated_init_frame_pc (gdbarch
, init_frame_pc_default
);
1050 set_gdbarch_short_bit (gdbarch
, 16);
1051 set_gdbarch_int_bit (gdbarch
, 32);
1052 set_gdbarch_long_bit (gdbarch
, 32);
1053 set_gdbarch_long_long_bit (gdbarch
, 64);
1054 set_gdbarch_float_bit (gdbarch
, 32);
1055 set_gdbarch_double_bit (gdbarch
, 64);
1056 set_gdbarch_long_double_bit (gdbarch
, 64);
1057 set_gdbarch_ptr_bit (gdbarch
, 32);
1059 set_gdbarch_num_regs (gdbarch
, frv_num_regs
);
1060 set_gdbarch_sp_regnum (gdbarch
, sp_regnum
);
1061 set_gdbarch_fp_regnum (gdbarch
, fp_regnum
);
1062 set_gdbarch_pc_regnum (gdbarch
, pc_regnum
);
1064 set_gdbarch_register_name (gdbarch
, frv_register_name
);
1065 set_gdbarch_register_size (gdbarch
, 4);
1066 set_gdbarch_register_bytes (gdbarch
, frv_num_regs
* 4);
1067 set_gdbarch_register_byte (gdbarch
, frv_register_byte
);
1068 set_gdbarch_register_raw_size (gdbarch
, frv_register_raw_size
);
1069 set_gdbarch_max_register_raw_size (gdbarch
, 4);
1070 set_gdbarch_register_virtual_size (gdbarch
, frv_register_virtual_size
);
1071 set_gdbarch_max_register_virtual_size (gdbarch
, 4);
1072 set_gdbarch_register_virtual_type (gdbarch
, frv_register_virtual_type
);
1074 set_gdbarch_skip_prologue (gdbarch
, frv_skip_prologue
);
1075 set_gdbarch_breakpoint_from_pc (gdbarch
, frv_breakpoint_from_pc
);
1077 set_gdbarch_frame_num_args (gdbarch
, frame_num_args_unknown
);
1078 set_gdbarch_frame_args_skip (gdbarch
, 0);
1079 set_gdbarch_frameless_function_invocation (gdbarch
, frv_frameless_function_invocation
);
1081 set_gdbarch_saved_pc_after_call (gdbarch
, frv_saved_pc_after_call
);
1083 set_gdbarch_frame_chain (gdbarch
, frv_frame_chain
);
1084 set_gdbarch_frame_saved_pc (gdbarch
, frv_frame_saved_pc
);
1086 set_gdbarch_deprecated_frame_init_saved_regs (gdbarch
, frv_frame_init_saved_regs
);
1088 set_gdbarch_use_struct_convention (gdbarch
, frv_use_struct_convention
);
1089 set_gdbarch_deprecated_extract_return_value (gdbarch
, frv_extract_return_value
);
1091 set_gdbarch_store_struct_return (gdbarch
, frv_store_struct_return
);
1092 set_gdbarch_deprecated_store_return_value (gdbarch
, frv_store_return_value
);
1093 set_gdbarch_deprecated_extract_struct_value_address (gdbarch
, frv_extract_struct_value_address
);
1095 /* Settings for calling functions in the inferior. */
1096 set_gdbarch_call_dummy_length (gdbarch
, 0);
1097 set_gdbarch_push_arguments (gdbarch
, frv_push_arguments
);
1098 set_gdbarch_push_return_address (gdbarch
, frv_push_return_address
);
1099 set_gdbarch_pop_frame (gdbarch
, frv_pop_frame
);
1101 set_gdbarch_call_dummy_p (gdbarch
, 1);
1102 set_gdbarch_call_dummy_words (gdbarch
, frv_call_dummy_words
);
1103 set_gdbarch_sizeof_call_dummy_words (gdbarch
, sizeof (frv_call_dummy_words
));
1104 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch
, 1);
1105 set_gdbarch_deprecated_init_extra_frame_info (gdbarch
, frv_init_extra_frame_info
);
1107 /* Settings that should be unnecessary. */
1108 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1110 set_gdbarch_read_pc (gdbarch
, generic_target_read_pc
);
1111 set_gdbarch_write_pc (gdbarch
, generic_target_write_pc
);
1112 set_gdbarch_read_fp (gdbarch
, generic_target_read_fp
);
1113 set_gdbarch_read_sp (gdbarch
, generic_target_read_sp
);
1114 set_gdbarch_write_sp (gdbarch
, generic_target_write_sp
);
1116 set_gdbarch_call_dummy_address (gdbarch
, entry_point_address
);
1117 set_gdbarch_call_dummy_breakpoint_offset (gdbarch
, 0);
1118 set_gdbarch_call_dummy_start_offset (gdbarch
, 0);
1119 set_gdbarch_deprecated_pc_in_call_dummy (gdbarch
, deprecated_pc_in_call_dummy_at_entry_point
);
1120 set_gdbarch_call_dummy_stack_adjust_p (gdbarch
, 0);
1121 set_gdbarch_fix_call_dummy (gdbarch
, generic_fix_call_dummy
);
1123 set_gdbarch_decr_pc_after_break (gdbarch
, 0);
1124 set_gdbarch_function_start_offset (gdbarch
, 0);
1125 set_gdbarch_register_convertible (gdbarch
, generic_register_convertible_not
);
1127 set_gdbarch_remote_translate_xfer_address
1128 (gdbarch
, frv_remote_translate_xfer_address
);
1130 /* Hardware watchpoint / breakpoint support. */
1131 switch (info
.bfd_arch_info
->mach
)
1134 case bfd_mach_frvsimple
:
1135 case bfd_mach_fr500
:
1136 case bfd_mach_frvtomcat
:
1137 /* fr500-style hardware debugging support. */
1138 var
->num_hw_watchpoints
= 4;
1139 var
->num_hw_breakpoints
= 4;
1142 case bfd_mach_fr400
:
1143 /* fr400-style hardware debugging support. */
1144 var
->num_hw_watchpoints
= 2;
1145 var
->num_hw_breakpoints
= 4;
1149 /* Otherwise, assume we don't have hardware debugging support. */
1150 var
->num_hw_watchpoints
= 0;
1151 var
->num_hw_breakpoints
= 0;
1159 _initialize_frv_tdep (void)
1161 register_gdbarch_init (bfd_arch_frv
, frv_gdbarch_init
);
1163 tm_print_insn
= print_insn_frv
;