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_breakpoint_from_pc_ftype frv_breakpoint_from_pc
;
34 static gdbarch_skip_prologue_ftype frv_skip_prologue
;
35 static gdbarch_deprecated_extract_return_value_ftype frv_extract_return_value
;
36 static gdbarch_deprecated_extract_struct_value_address_ftype frv_extract_struct_value_address
;
37 static gdbarch_use_struct_convention_ftype frv_use_struct_convention
;
38 static gdbarch_frameless_function_invocation_ftype frv_frameless_function_invocation
;
39 static gdbarch_init_extra_frame_info_ftype stupid_useless_init_extra_frame_info
;
40 static gdbarch_push_arguments_ftype frv_push_arguments
;
41 static gdbarch_saved_pc_after_call_ftype frv_saved_pc_after_call
;
43 static void frv_pop_frame_regular (struct frame_info
*frame
);
45 /* Register numbers. You can change these as needed, but don't forget
46 to update the simulator accordingly. */
48 /* The total number of registers we know exist. */
51 /* Register numbers 0 -- 63 are always reserved for general-purpose
52 registers. The chip at hand may have less. */
56 struct_return_regnum
= 3,
59 /* Register numbers 64 -- 127 are always reserved for floating-point
60 registers. The chip at hand may have less. */
61 first_fpr_regnum
= 64,
62 last_fpr_regnum
= 127,
64 /* Register numbers 128 on up are always reserved for special-purpose
66 first_spr_regnum
= 128,
82 static LONGEST frv_call_dummy_words
[] =
86 /* The contents of this structure can only be trusted after we've
87 frv_frame_init_saved_regs on the frame. */
88 struct frame_extra_info
90 /* The offset from our frame pointer to our caller's stack
92 int fp_to_callers_sp_offset
;
94 /* Non-zero if we've saved our return address on the stack yet.
95 Zero if it's still sitting in the link register. */
96 int lr_saved_on_stack
;
100 /* A structure describing a particular variant of the FRV.
101 We allocate and initialize one of these structures when we create
102 the gdbarch object for a variant.
104 At the moment, all the FR variants we support differ only in which
105 registers are present; the portable code of GDB knows that
106 registers whose names are the empty string don't exist, so the
107 `register_names' array captures all the per-variant information we
110 in the future, if we need to have per-variant maps for raw size,
111 virtual type, etc., we should replace register_names with an array
112 of structures, each of which gives all the necessary info for one
113 register. Don't stick parallel arrays in here --- that's so
117 /* How many general-purpose registers does this variant have? */
120 /* How many floating-point registers does this variant have? */
123 /* How many hardware watchpoints can it support? */
124 int num_hw_watchpoints
;
126 /* How many hardware breakpoints can it support? */
127 int num_hw_breakpoints
;
129 /* Register names. */
130 char **register_names
;
133 #define CURRENT_VARIANT (gdbarch_tdep (current_gdbarch))
136 /* Allocate a new variant structure, and set up default values for all
138 static struct gdbarch_tdep
*
141 struct gdbarch_tdep
*var
;
145 var
= xmalloc (sizeof (*var
));
146 memset (var
, 0, sizeof (*var
));
150 var
->num_hw_watchpoints
= 0;
151 var
->num_hw_breakpoints
= 0;
153 /* By default, don't supply any general-purpose or floating-point
155 var
->register_names
= (char **) xmalloc (frv_num_regs
* sizeof (char *));
156 for (r
= 0; r
< frv_num_regs
; r
++)
157 var
->register_names
[r
] = "";
159 /* Do, however, supply default names for the special-purpose
161 for (r
= first_spr_regnum
; r
<= last_spr_regnum
; ++r
)
163 sprintf (buf
, "x%d", r
);
164 var
->register_names
[r
] = xstrdup (buf
);
167 var
->register_names
[pc_regnum
] = "pc";
168 var
->register_names
[lr_regnum
] = "lr";
169 var
->register_names
[lcr_regnum
] = "lcr";
171 var
->register_names
[psr_regnum
] = "psr";
172 var
->register_names
[ccr_regnum
] = "ccr";
173 var
->register_names
[cccr_regnum
] = "cccr";
174 var
->register_names
[tbr_regnum
] = "tbr";
176 /* Debug registers. */
177 var
->register_names
[brr_regnum
] = "brr";
178 var
->register_names
[dbar0_regnum
] = "dbar0";
179 var
->register_names
[dbar1_regnum
] = "dbar1";
180 var
->register_names
[dbar2_regnum
] = "dbar2";
181 var
->register_names
[dbar3_regnum
] = "dbar3";
187 /* Indicate that the variant VAR has NUM_GPRS general-purpose
188 registers, and fill in the names array appropriately. */
190 set_variant_num_gprs (struct gdbarch_tdep
*var
, int num_gprs
)
194 var
->num_gprs
= num_gprs
;
196 for (r
= 0; r
< num_gprs
; ++r
)
200 sprintf (buf
, "gr%d", r
);
201 var
->register_names
[first_gpr_regnum
+ r
] = xstrdup (buf
);
206 /* Indicate that the variant VAR has NUM_FPRS floating-point
207 registers, and fill in the names array appropriately. */
209 set_variant_num_fprs (struct gdbarch_tdep
*var
, int num_fprs
)
213 var
->num_fprs
= num_fprs
;
215 for (r
= 0; r
< num_fprs
; ++r
)
219 sprintf (buf
, "fr%d", r
);
220 var
->register_names
[first_fpr_regnum
+ r
] = xstrdup (buf
);
226 frv_register_name (int reg
)
230 if (reg
>= frv_num_regs
)
233 return CURRENT_VARIANT
->register_names
[reg
];
238 frv_register_raw_size (int reg
)
244 frv_register_virtual_size (int reg
)
250 frv_register_virtual_type (int reg
)
252 if (reg
>= 64 && reg
<= 127)
253 return builtin_type_float
;
255 return builtin_type_int
;
259 frv_register_byte (int reg
)
264 static const unsigned char *
265 frv_breakpoint_from_pc (CORE_ADDR
*pcptr
, int *lenp
)
267 static unsigned char breakpoint
[] = {0xc0, 0x70, 0x00, 0x01};
268 *lenp
= sizeof (breakpoint
);
273 frv_frame_chain (struct frame_info
*frame
)
275 CORE_ADDR saved_fp_addr
;
277 if (frame
->saved_regs
&& frame
->saved_regs
[fp_regnum
] != 0)
278 saved_fp_addr
= frame
->saved_regs
[fp_regnum
];
280 /* Just assume it was saved in the usual place. */
281 saved_fp_addr
= frame
->frame
;
283 return read_memory_integer (saved_fp_addr
, 4);
287 frv_frame_saved_pc (struct frame_info
*frame
)
289 frv_frame_init_saved_regs (frame
);
291 /* Perhaps the prologue analyzer recorded where it was stored.
292 (As of 14 Oct 2001, it never does.) */
293 if (frame
->saved_regs
&& frame
->saved_regs
[pc_regnum
] != 0)
294 return read_memory_integer (frame
->saved_regs
[pc_regnum
], 4);
296 /* If the prologue analyzer tells us the link register was saved on
297 the stack, get it from there. */
298 if (frame
->extra_info
->lr_saved_on_stack
)
299 return read_memory_integer (frame
->frame
+ 8, 4);
301 /* Otherwise, it's still in LR.
302 However, if FRAME isn't the youngest frame, this is kind of
303 suspicious --- if this frame called somebody else, then its LR
304 has certainly been overwritten. */
306 return read_register (lr_regnum
);
308 /* By default, assume it's saved in the standard place, relative to
309 the frame pointer. */
310 return read_memory_integer (frame
->frame
+ 8, 4);
314 /* Return true if REG is a caller-saves ("scratch") register,
317 is_caller_saves_reg (int reg
)
319 return ((4 <= reg
&& reg
<= 7)
320 || (14 <= reg
&& reg
<= 15)
321 || (32 <= reg
&& reg
<= 47));
325 /* Return true if REG is a callee-saves register, false otherwise. */
327 is_callee_saves_reg (int reg
)
329 return ((16 <= reg
&& reg
<= 31)
330 || (48 <= reg
&& reg
<= 63));
334 /* Return true if REG is an argument register, false otherwise. */
336 is_argument_reg (int reg
)
338 return (8 <= reg
&& reg
<= 13);
342 /* Scan an FR-V prologue, starting at PC, until frame->PC.
343 If FRAME is non-zero, fill in its saved_regs with appropriate addresses.
344 We assume FRAME's saved_regs array has already been allocated and cleared.
345 Return the first PC value after the prologue.
347 Note that, for unoptimized code, we almost don't need this function
348 at all; all arguments and locals live on the stack, so we just need
349 the FP to find everything. The catch: structures passed by value
350 have their addresses living in registers; they're never spilled to
351 the stack. So if you ever want to be able to get to these
352 arguments in any frame but the top, you'll need to do this serious
353 prologue analysis. */
355 frv_analyze_prologue (CORE_ADDR pc
, struct frame_info
*frame
)
357 /* When writing out instruction bitpatterns, we use the following
358 letters to label instruction fields:
359 P - The parallel bit. We don't use this.
360 J - The register number of GRj in the instruction description.
361 K - The register number of GRk in the instruction description.
362 I - The register number of GRi.
363 S - a signed imediate offset.
364 U - an unsigned immediate offset.
366 The dots below the numbers indicate where hex digit boundaries
367 fall, to make it easier to check the numbers. */
369 /* Non-zero iff we've seen the instruction that initializes the
370 frame pointer for this function's frame. */
373 /* If fp_set is non_zero, then this is the distance from
374 the stack pointer to frame pointer: fp = sp + fp_offset. */
377 /* Total size of frame prior to any alloca operations. */
380 /* The number of the general-purpose register we saved the return
381 address ("link register") in, or -1 if we haven't moved it yet. */
382 int lr_save_reg
= -1;
384 /* Non-zero iff we've saved the LR onto the stack. */
385 int lr_saved_on_stack
= 0;
387 /* If gr_saved[i] is non-zero, then we've noticed that general
388 register i has been saved at gr_sp_offset[i] from the stack
391 int gr_sp_offset
[64];
393 memset (gr_saved
, 0, sizeof (gr_saved
));
395 while (! frame
|| pc
< frame
->pc
)
397 LONGEST op
= read_memory_integer (pc
, 4);
399 /* The tests in this chain of ifs should be in order of
400 decreasing selectivity, so that more particular patterns get
401 to fire before less particular patterns. */
403 /* Setting the FP from the SP:
405 P 000010 0100010 000001 000000000000 = 0x04881000
406 0 111111 1111111 111111 111111111111 = 0x7fffffff
408 We treat this as part of the prologue. */
409 if ((op
& 0x7fffffff) == 0x04881000)
415 /* Move the link register to the scratch register grJ, before saving:
417 P 000100 0000011 010000 000111 JJJJJJ = 0x080d01c0
418 0 111111 1111111 111111 111111 000000 = 0x7fffffc0
420 We treat this as part of the prologue. */
421 else if ((op
& 0x7fffffc0) == 0x080d01c0)
423 int gr_j
= op
& 0x3f;
425 /* If we're moving it to a scratch register, that's fine. */
426 if (is_caller_saves_reg (gr_j
))
428 /* Otherwise it's not a prologue instruction that we
434 /* To save multiple callee-saves registers on the stack, at
438 P KKKKKK 0000011 000001 000011 000000 = 0x000c10c0
439 0 000000 1111111 111111 111111 111111 = 0x01ffffff
442 P KKKKKK 0000011 000001 000100 000000 = 0x000c1100
443 0 000000 1111111 111111 111111 111111 = 0x01ffffff
445 We treat this as part of the prologue, and record the register's
446 saved address in the frame structure. */
447 else if ((op
& 0x01ffffff) == 0x000c10c0
448 || (op
& 0x01ffffff) == 0x000c1100)
450 int gr_k
= ((op
>> 25) & 0x3f);
451 int ope
= ((op
>> 6) & 0x3f);
455 /* Is it an std or an stq? */
461 /* Is it really a callee-saves register? */
462 if (is_callee_saves_reg (gr_k
))
464 for (i
= 0; i
< count
; i
++)
466 gr_saved
[gr_k
+ i
] = 1;
467 gr_sp_offset
[gr_k
+ i
] = 4 * i
;
471 /* It's not a prologue instruction. */
475 /* Adjusting the stack pointer. (The stack pointer is GR1.)
477 P 000001 0010000 000001 SSSSSSSSSSSS = 0x02401000
478 0 111111 1111111 111111 000000000000 = 0x7ffff000
480 We treat this as part of the prologue. */
481 else if ((op
& 0x7ffff000) == 0x02401000)
483 /* Sign-extend the twelve-bit field.
484 (Isn't there a better way to do this?) */
485 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
490 /* Setting the FP to a constant distance from the SP:
492 P 000010 0010000 000001 SSSSSSSSSSSS = 0x04401000
493 0 111111 1111111 111111 000000000000 = 0x7ffff000
495 We treat this as part of the prologue. */
496 else if ((op
& 0x7ffff000) == 0x04401000)
498 /* Sign-extend the twelve-bit field.
499 (Isn't there a better way to do this?) */
500 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
505 /* To spill an argument register to a scratch register:
507 P KKKKKK 0100010 IIIIII 000000000000 = 0x00880000
508 0 000000 1111111 000000 111111111111 = 0x01fc0fff
510 For the time being, we treat this as a prologue instruction,
511 assuming that GRi is an argument register. This one's kind
512 of suspicious, because it seems like it could be part of a
513 legitimate body instruction. But we only come here when the
514 source info wasn't helpful, so we have to do the best we can.
515 Hopefully once GCC and GDB agree on how to emit line number
516 info for prologues, then this code will never come into play. */
517 else if ((op
& 0x01fc0fff) == 0x00880000)
519 int gr_i
= ((op
>> 12) & 0x3f);
521 /* If the source isn't an arg register, then this isn't a
522 prologue instruction. */
523 if (! is_argument_reg (gr_i
))
527 /* To spill 16-bit values to the stack:
529 P KKKKKK 1010001 000010 SSSSSSSSSSSS = 0x01442000
530 0 000000 1111111 111111 000000000000 = 0x01fff000
532 And for 8-bit values, we use STB instructions.
534 P KKKKKK 1010000 000010 SSSSSSSSSSSS = 0x01402000
535 0 000000 1111111 111111 000000000000 = 0x01fff000
537 We check that GRk is really an argument register, and treat
538 all such as part of the prologue. */
539 else if ( (op
& 0x01fff000) == 0x01442000
540 || (op
& 0x01fff000) == 0x01402000)
542 int gr_k
= ((op
>> 25) & 0x3f);
544 if (! is_argument_reg (gr_k
))
545 break; /* Source isn't an arg register. */
548 /* To save multiple callee-saves register on the stack, at a
552 P KKKKKK 1010011 000001 SSSSSSSSSSSS = 0x014c1000
553 0 000000 1111111 111111 000000000000 = 0x01fff000
556 P KKKKKK 1010100 000001 SSSSSSSSSSSS = 0x01501000
557 0 000000 1111111 111111 000000000000 = 0x01fff000
559 We treat this as part of the prologue, and record the register's
560 saved address in the frame structure. */
561 else if ((op
& 0x01fff000) == 0x014c1000
562 || (op
& 0x01fff000) == 0x01501000)
564 int gr_k
= ((op
>> 25) & 0x3f);
568 /* Is it a stdi or a stqi? */
569 if ((op
& 0x01fff000) == 0x014c1000)
574 /* Is it really a callee-saves register? */
575 if (is_callee_saves_reg (gr_k
))
577 /* Sign-extend the twelve-bit field.
578 (Isn't there a better way to do this?) */
579 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
581 for (i
= 0; i
< count
; i
++)
583 gr_saved
[gr_k
+ i
] = 1;
584 gr_sp_offset
[gr_k
+ i
] = s
+ (4 * i
);
588 /* It's not a prologue instruction. */
592 /* Storing any kind of integer register at any constant offset
593 from any other register.
596 P KKKKKK 0000011 IIIIII 000010 000000 = 0x000c0080
597 0 000000 1111111 000000 111111 111111 = 0x01fc0fff
600 P KKKKKK 1010010 IIIIII SSSSSSSSSSSS = 0x01480000
601 0 000000 1111111 000000 000000000000 = 0x01fc0000
603 These could be almost anything, but a lot of prologue
604 instructions fall into this pattern, so let's decode the
605 instruction once, and then work at a higher level. */
606 else if (((op
& 0x01fc0fff) == 0x000c0080)
607 || ((op
& 0x01fc0000) == 0x01480000))
609 int gr_k
= ((op
>> 25) & 0x3f);
610 int gr_i
= ((op
>> 12) & 0x3f);
613 /* Are we storing with gr0 as an offset, or using an
615 if ((op
& 0x01fc0fff) == 0x000c0080)
618 offset
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
620 /* If the address isn't relative to the SP or FP, it's not a
621 prologue instruction. */
622 if (gr_i
!= sp_regnum
&& gr_i
!= fp_regnum
)
625 /* Saving the old FP in the new frame (relative to the SP). */
626 if (gr_k
== fp_regnum
&& gr_i
== sp_regnum
)
629 /* Saving callee-saves register(s) on the stack, relative to
631 else if (gr_i
== sp_regnum
632 && is_callee_saves_reg (gr_k
))
635 gr_sp_offset
[gr_k
] = offset
;
638 /* Saving the scratch register holding the return address. */
639 else if (lr_save_reg
!= -1
640 && gr_k
== lr_save_reg
)
641 lr_saved_on_stack
= 1;
643 /* Spilling int-sized arguments to the stack. */
644 else if (is_argument_reg (gr_k
))
647 /* It's not a store instruction we recognize, so this must
648 be the end of the prologue. */
653 /* It's not any instruction we recognize, so this must be the end
663 frame
->extra_info
->lr_saved_on_stack
= lr_saved_on_stack
;
665 /* If we know the relationship between the stack and frame
666 pointers, record the addresses of the registers we noticed.
667 Note that we have to do this as a separate step at the end,
668 because instructions may save relative to the SP, but we need
669 their addresses relative to the FP. */
674 for (i
= 0; i
< 64; i
++)
676 frame
->saved_regs
[i
] = (frame
->frame
677 - fp_offset
+ gr_sp_offset
[i
]);
679 frame
->extra_info
->fp_to_callers_sp_offset
= framesize
- fp_offset
;
688 frv_skip_prologue (CORE_ADDR pc
)
690 CORE_ADDR func_addr
, func_end
, new_pc
;
694 /* If the line table has entry for a line *within* the function
695 (i.e., not in the prologue, and not past the end), then that's
697 if (find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
699 struct symtab_and_line sal
;
701 sal
= find_pc_line (func_addr
, 0);
703 if (sal
.line
!= 0 && sal
.end
< func_end
)
709 /* The FR-V prologue is at least five instructions long (twenty bytes).
710 If we didn't find a real source location past that, then
711 do a full analysis of the prologue. */
712 if (new_pc
< pc
+ 20)
713 new_pc
= frv_analyze_prologue (pc
, 0);
719 frv_frame_init_saved_regs (struct frame_info
*frame
)
721 if (frame
->saved_regs
)
724 frame_saved_regs_zalloc (frame
);
725 frame
->saved_regs
[fp_regnum
] = frame
->frame
;
727 /* Find the beginning of this function, so we can analyze its
730 CORE_ADDR func_addr
, func_end
;
732 if (find_pc_partial_function (frame
->pc
, NULL
, &func_addr
, &func_end
))
733 frv_analyze_prologue (func_addr
, frame
);
738 frv_extract_return_value (struct type
*type
, char *regbuf
, char *valbuf
)
740 memcpy (valbuf
, (regbuf
741 + frv_register_byte (8)
742 + (TYPE_LENGTH (type
) < 4 ? 4 - TYPE_LENGTH (type
) : 0)),
747 frv_extract_struct_value_address (char *regbuf
)
749 return extract_unsigned_integer (regbuf
+ frv_register_byte (struct_return_regnum
),
754 frv_store_struct_return (CORE_ADDR addr
, CORE_ADDR sp
)
756 write_register (struct_return_regnum
, addr
);
760 frv_frameless_function_invocation (struct frame_info
*frame
)
762 return frameless_look_for_prologue (frame
);
766 frv_saved_pc_after_call (struct frame_info
*frame
)
768 return read_register (lr_regnum
);
772 frv_init_extra_frame_info (int fromleaf
, struct frame_info
*frame
)
774 frame_extra_info_zalloc (frame
, sizeof (struct frame_extra_info
));
775 frame
->extra_info
->fp_to_callers_sp_offset
= 0;
776 frame
->extra_info
->lr_saved_on_stack
= 0;
779 #define ROUND_UP(n,a) (((n)+(a)-1) & ~((a)-1))
780 #define ROUND_DOWN(n,a) ((n) & ~((a)-1))
783 frv_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
784 int struct_return
, CORE_ADDR struct_addr
)
791 struct type
*arg_type
;
793 enum type_code typecode
;
799 printf("Push %d args at sp = %x, struct_return=%d (%x)\n",
800 nargs
, (int) sp
, struct_return
, struct_addr
);
804 for (argnum
= 0; argnum
< nargs
; ++argnum
)
805 stack_space
+= ROUND_UP (TYPE_LENGTH (VALUE_TYPE (args
[argnum
])), 4);
807 stack_space
-= (6 * 4);
811 /* Make sure stack is dword aligned. */
812 sp
= ROUND_DOWN (sp
, 8);
819 write_register (struct_return_regnum
, struct_addr
);
821 for (argnum
= 0; argnum
< nargs
; ++argnum
)
824 arg_type
= check_typedef (VALUE_TYPE (arg
));
825 len
= TYPE_LENGTH (arg_type
);
826 typecode
= TYPE_CODE (arg_type
);
828 if (typecode
== TYPE_CODE_STRUCT
|| typecode
== TYPE_CODE_UNION
)
830 store_unsigned_integer (valbuf
, 4, VALUE_ADDRESS (arg
));
831 typecode
= TYPE_CODE_PTR
;
837 val
= (char *) VALUE_CONTENTS (arg
);
842 int partial_len
= (len
< 4 ? len
: 4);
846 regval
= extract_unsigned_integer (val
, partial_len
);
848 printf(" Argnum %d data %x -> reg %d\n",
849 argnum
, (int) regval
, argreg
);
851 write_register (argreg
, regval
);
857 printf(" Argnum %d data %x -> offset %d (%x)\n",
858 argnum
, *((int *)val
), stack_offset
, (int) (sp
+ stack_offset
));
860 write_memory (sp
+ stack_offset
, val
, partial_len
);
861 stack_offset
+= ROUND_UP(partial_len
, 4);
871 frv_push_return_address (CORE_ADDR pc
, CORE_ADDR sp
)
873 write_register (lr_regnum
, CALL_DUMMY_ADDRESS ());
878 frv_store_return_value (struct type
*type
, char *valbuf
)
880 int length
= TYPE_LENGTH (type
);
881 int reg8_offset
= frv_register_byte (8);
884 deprecated_write_register_bytes (reg8_offset
+ (4 - length
), valbuf
,
886 else if (length
== 8)
887 deprecated_write_register_bytes (reg8_offset
, valbuf
, length
);
889 internal_error (__FILE__
, __LINE__
,
890 "Don't know how to return a %d-byte value.", length
);
896 generic_pop_current_frame (frv_pop_frame_regular
);
900 frv_pop_frame_regular (struct frame_info
*frame
)
907 frv_frame_init_saved_regs (frame
);
909 write_register (pc_regnum
, frv_frame_saved_pc (frame
));
910 for (regno
= 0; regno
< frv_num_regs
; ++regno
)
912 if (frame
->saved_regs
[regno
]
913 && regno
!= pc_regnum
914 && regno
!= sp_regnum
)
916 write_register (regno
,
917 read_memory_integer (frame
->saved_regs
[regno
], 4));
920 write_register (sp_regnum
, fp
+ frame
->extra_info
->fp_to_callers_sp_offset
);
921 flush_cached_frames ();
926 frv_remote_translate_xfer_address (CORE_ADDR memaddr
, int nr_bytes
,
927 CORE_ADDR
*targ_addr
, int *targ_len
)
929 *targ_addr
= memaddr
;
930 *targ_len
= nr_bytes
;
934 /* Hardware watchpoint / breakpoint support for the FR500
938 frv_check_watch_resources (int type
, int cnt
, int ot
)
940 struct gdbarch_tdep
*var
= CURRENT_VARIANT
;
942 /* Watchpoints not supported on simulator. */
943 if (strcmp (target_shortname
, "sim") == 0)
946 if (type
== bp_hardware_breakpoint
)
948 if (var
->num_hw_breakpoints
== 0)
950 else if (cnt
<= var
->num_hw_breakpoints
)
955 if (var
->num_hw_watchpoints
== 0)
959 else if (cnt
<= var
->num_hw_watchpoints
)
967 frv_stopped_data_address (void)
969 CORE_ADDR brr
, dbar0
, dbar1
, dbar2
, dbar3
;
971 brr
= read_register (brr_regnum
);
972 dbar0
= read_register (dbar0_regnum
);
973 dbar1
= read_register (dbar1_regnum
);
974 dbar2
= read_register (dbar2_regnum
);
975 dbar3
= read_register (dbar3_regnum
);
979 else if (brr
& (1<<10))
981 else if (brr
& (1<<9))
983 else if (brr
& (1<<8))
989 static struct gdbarch
*
990 frv_gdbarch_init (struct gdbarch_info info
, struct gdbarch_list
*arches
)
992 struct gdbarch
*gdbarch
;
993 struct gdbarch_tdep
*var
;
995 /* Check to see if we've already built an appropriate architecture
996 object for this executable. */
997 arches
= gdbarch_list_lookup_by_info (arches
, &info
);
999 return arches
->gdbarch
;
1001 /* Select the right tdep structure for this variant. */
1002 var
= new_variant ();
1003 switch (info
.bfd_arch_info
->mach
)
1006 case bfd_mach_frvsimple
:
1007 case bfd_mach_fr500
:
1008 case bfd_mach_frvtomcat
:
1009 set_variant_num_gprs (var
, 64);
1010 set_variant_num_fprs (var
, 64);
1013 case bfd_mach_fr400
:
1014 set_variant_num_gprs (var
, 32);
1015 set_variant_num_fprs (var
, 32);
1019 /* Never heard of this variant. */
1023 gdbarch
= gdbarch_alloc (&info
, var
);
1025 /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
1026 ready to unwind the PC first (see frame.c:get_prev_frame()). */
1027 set_gdbarch_deprecated_init_frame_pc (gdbarch
, init_frame_pc_default
);
1029 set_gdbarch_short_bit (gdbarch
, 16);
1030 set_gdbarch_int_bit (gdbarch
, 32);
1031 set_gdbarch_long_bit (gdbarch
, 32);
1032 set_gdbarch_long_long_bit (gdbarch
, 64);
1033 set_gdbarch_float_bit (gdbarch
, 32);
1034 set_gdbarch_double_bit (gdbarch
, 64);
1035 set_gdbarch_long_double_bit (gdbarch
, 64);
1036 set_gdbarch_ptr_bit (gdbarch
, 32);
1038 set_gdbarch_num_regs (gdbarch
, frv_num_regs
);
1039 set_gdbarch_sp_regnum (gdbarch
, sp_regnum
);
1040 set_gdbarch_deprecated_fp_regnum (gdbarch
, fp_regnum
);
1041 set_gdbarch_pc_regnum (gdbarch
, pc_regnum
);
1043 set_gdbarch_register_name (gdbarch
, frv_register_name
);
1044 set_gdbarch_deprecated_register_size (gdbarch
, 4);
1045 set_gdbarch_deprecated_register_bytes (gdbarch
, frv_num_regs
* 4);
1046 set_gdbarch_deprecated_register_byte (gdbarch
, frv_register_byte
);
1047 set_gdbarch_deprecated_register_raw_size (gdbarch
, frv_register_raw_size
);
1048 set_gdbarch_deprecated_max_register_raw_size (gdbarch
, 4);
1049 set_gdbarch_deprecated_register_virtual_size (gdbarch
, frv_register_virtual_size
);
1050 set_gdbarch_deprecated_max_register_virtual_size (gdbarch
, 4);
1051 set_gdbarch_deprecated_register_virtual_type (gdbarch
, frv_register_virtual_type
);
1053 set_gdbarch_skip_prologue (gdbarch
, frv_skip_prologue
);
1054 set_gdbarch_breakpoint_from_pc (gdbarch
, frv_breakpoint_from_pc
);
1056 set_gdbarch_frame_args_skip (gdbarch
, 0);
1057 set_gdbarch_frameless_function_invocation (gdbarch
, frv_frameless_function_invocation
);
1059 set_gdbarch_deprecated_saved_pc_after_call (gdbarch
, frv_saved_pc_after_call
);
1061 set_gdbarch_deprecated_frame_chain (gdbarch
, frv_frame_chain
);
1062 set_gdbarch_deprecated_frame_saved_pc (gdbarch
, frv_frame_saved_pc
);
1064 set_gdbarch_deprecated_frame_init_saved_regs (gdbarch
, frv_frame_init_saved_regs
);
1066 set_gdbarch_use_struct_convention (gdbarch
, always_use_struct_convention
);
1067 set_gdbarch_deprecated_extract_return_value (gdbarch
, frv_extract_return_value
);
1069 set_gdbarch_deprecated_store_struct_return (gdbarch
, frv_store_struct_return
);
1070 set_gdbarch_deprecated_store_return_value (gdbarch
, frv_store_return_value
);
1071 set_gdbarch_deprecated_extract_struct_value_address (gdbarch
, frv_extract_struct_value_address
);
1073 /* Settings for calling functions in the inferior. */
1074 set_gdbarch_deprecated_push_arguments (gdbarch
, frv_push_arguments
);
1075 set_gdbarch_deprecated_push_return_address (gdbarch
, frv_push_return_address
);
1076 set_gdbarch_deprecated_pop_frame (gdbarch
, frv_pop_frame
);
1078 set_gdbarch_deprecated_call_dummy_words (gdbarch
, frv_call_dummy_words
);
1079 set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch
, sizeof (frv_call_dummy_words
));
1080 set_gdbarch_deprecated_init_extra_frame_info (gdbarch
, frv_init_extra_frame_info
);
1082 /* Settings that should be unnecessary. */
1083 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1085 set_gdbarch_write_pc (gdbarch
, generic_target_write_pc
);
1086 set_gdbarch_deprecated_dummy_write_sp (gdbarch
, deprecated_write_sp
);
1088 set_gdbarch_deprecated_pc_in_call_dummy (gdbarch
, deprecated_pc_in_call_dummy_at_entry_point
);
1090 set_gdbarch_decr_pc_after_break (gdbarch
, 0);
1091 set_gdbarch_function_start_offset (gdbarch
, 0);
1093 set_gdbarch_remote_translate_xfer_address
1094 (gdbarch
, frv_remote_translate_xfer_address
);
1096 /* Hardware watchpoint / breakpoint support. */
1097 switch (info
.bfd_arch_info
->mach
)
1100 case bfd_mach_frvsimple
:
1101 case bfd_mach_fr500
:
1102 case bfd_mach_frvtomcat
:
1103 /* fr500-style hardware debugging support. */
1104 var
->num_hw_watchpoints
= 4;
1105 var
->num_hw_breakpoints
= 4;
1108 case bfd_mach_fr400
:
1109 /* fr400-style hardware debugging support. */
1110 var
->num_hw_watchpoints
= 2;
1111 var
->num_hw_breakpoints
= 4;
1115 /* Otherwise, assume we don't have hardware debugging support. */
1116 var
->num_hw_watchpoints
= 0;
1117 var
->num_hw_breakpoints
= 0;
1125 _initialize_frv_tdep (void)
1127 register_gdbarch_init (bfd_arch_frv
, frv_gdbarch_init
);
1129 deprecated_tm_print_insn
= print_insn_frv
;