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_frameless_function_invocation_ftype frv_frameless_function_invocation
;
38 static gdbarch_init_extra_frame_info_ftype stupid_useless_init_extra_frame_info
;
39 static gdbarch_push_arguments_ftype frv_push_arguments
;
40 static gdbarch_saved_pc_after_call_ftype frv_saved_pc_after_call
;
42 static void frv_pop_frame_regular (struct frame_info
*frame
);
44 /* Register numbers. You can change these as needed, but don't forget
45 to update the simulator accordingly. */
47 /* The total number of registers we know exist. */
50 /* Register numbers 0 -- 63 are always reserved for general-purpose
51 registers. The chip at hand may have less. */
55 struct_return_regnum
= 3,
58 /* Register numbers 64 -- 127 are always reserved for floating-point
59 registers. The chip at hand may have less. */
60 first_fpr_regnum
= 64,
61 last_fpr_regnum
= 127,
63 /* Register numbers 128 on up are always reserved for special-purpose
65 first_spr_regnum
= 128,
81 static LONGEST frv_call_dummy_words
[] =
85 /* The contents of this structure can only be trusted after we've
86 frv_frame_init_saved_regs on the frame. */
87 struct frame_extra_info
89 /* The offset from our frame pointer to our caller's stack
91 int fp_to_callers_sp_offset
;
93 /* Non-zero if we've saved our return address on the stack yet.
94 Zero if it's still sitting in the link register. */
95 int lr_saved_on_stack
;
99 /* A structure describing a particular variant of the FRV.
100 We allocate and initialize one of these structures when we create
101 the gdbarch object for a variant.
103 At the moment, all the FR variants we support differ only in which
104 registers are present; the portable code of GDB knows that
105 registers whose names are the empty string don't exist, so the
106 `register_names' array captures all the per-variant information we
109 in the future, if we need to have per-variant maps for raw size,
110 virtual type, etc., we should replace register_names with an array
111 of structures, each of which gives all the necessary info for one
112 register. Don't stick parallel arrays in here --- that's so
116 /* How many general-purpose registers does this variant have? */
119 /* How many floating-point registers does this variant have? */
122 /* How many hardware watchpoints can it support? */
123 int num_hw_watchpoints
;
125 /* How many hardware breakpoints can it support? */
126 int num_hw_breakpoints
;
128 /* Register names. */
129 char **register_names
;
132 #define CURRENT_VARIANT (gdbarch_tdep (current_gdbarch))
135 /* Allocate a new variant structure, and set up default values for all
137 static struct gdbarch_tdep
*
140 struct gdbarch_tdep
*var
;
144 var
= xmalloc (sizeof (*var
));
145 memset (var
, 0, sizeof (*var
));
149 var
->num_hw_watchpoints
= 0;
150 var
->num_hw_breakpoints
= 0;
152 /* By default, don't supply any general-purpose or floating-point
154 var
->register_names
= (char **) xmalloc (frv_num_regs
* sizeof (char *));
155 for (r
= 0; r
< frv_num_regs
; r
++)
156 var
->register_names
[r
] = "";
158 /* Do, however, supply default names for the special-purpose
160 for (r
= first_spr_regnum
; r
<= last_spr_regnum
; ++r
)
162 sprintf (buf
, "x%d", r
);
163 var
->register_names
[r
] = xstrdup (buf
);
166 var
->register_names
[pc_regnum
] = "pc";
167 var
->register_names
[lr_regnum
] = "lr";
168 var
->register_names
[lcr_regnum
] = "lcr";
170 var
->register_names
[psr_regnum
] = "psr";
171 var
->register_names
[ccr_regnum
] = "ccr";
172 var
->register_names
[cccr_regnum
] = "cccr";
173 var
->register_names
[tbr_regnum
] = "tbr";
175 /* Debug registers. */
176 var
->register_names
[brr_regnum
] = "brr";
177 var
->register_names
[dbar0_regnum
] = "dbar0";
178 var
->register_names
[dbar1_regnum
] = "dbar1";
179 var
->register_names
[dbar2_regnum
] = "dbar2";
180 var
->register_names
[dbar3_regnum
] = "dbar3";
186 /* Indicate that the variant VAR has NUM_GPRS general-purpose
187 registers, and fill in the names array appropriately. */
189 set_variant_num_gprs (struct gdbarch_tdep
*var
, int num_gprs
)
193 var
->num_gprs
= num_gprs
;
195 for (r
= 0; r
< num_gprs
; ++r
)
199 sprintf (buf
, "gr%d", r
);
200 var
->register_names
[first_gpr_regnum
+ r
] = xstrdup (buf
);
205 /* Indicate that the variant VAR has NUM_FPRS floating-point
206 registers, and fill in the names array appropriately. */
208 set_variant_num_fprs (struct gdbarch_tdep
*var
, int num_fprs
)
212 var
->num_fprs
= num_fprs
;
214 for (r
= 0; r
< num_fprs
; ++r
)
218 sprintf (buf
, "fr%d", r
);
219 var
->register_names
[first_fpr_regnum
+ r
] = xstrdup (buf
);
225 frv_register_name (int reg
)
229 if (reg
>= frv_num_regs
)
232 return CURRENT_VARIANT
->register_names
[reg
];
237 frv_register_raw_size (int reg
)
243 frv_register_virtual_size (int reg
)
249 frv_register_virtual_type (int reg
)
251 if (reg
>= 64 && reg
<= 127)
252 return builtin_type_float
;
254 return builtin_type_int
;
258 frv_register_byte (int reg
)
263 static const unsigned char *
264 frv_breakpoint_from_pc (CORE_ADDR
*pcptr
, int *lenp
)
266 static unsigned char breakpoint
[] = {0xc0, 0x70, 0x00, 0x01};
267 *lenp
= sizeof (breakpoint
);
272 frv_frame_chain (struct frame_info
*frame
)
274 CORE_ADDR saved_fp_addr
;
276 if (frame
->saved_regs
&& frame
->saved_regs
[fp_regnum
] != 0)
277 saved_fp_addr
= frame
->saved_regs
[fp_regnum
];
279 /* Just assume it was saved in the usual place. */
280 saved_fp_addr
= frame
->frame
;
282 return read_memory_integer (saved_fp_addr
, 4);
286 frv_frame_saved_pc (struct frame_info
*frame
)
288 frv_frame_init_saved_regs (frame
);
290 /* Perhaps the prologue analyzer recorded where it was stored.
291 (As of 14 Oct 2001, it never does.) */
292 if (frame
->saved_regs
&& frame
->saved_regs
[pc_regnum
] != 0)
293 return read_memory_integer (frame
->saved_regs
[pc_regnum
], 4);
295 /* If the prologue analyzer tells us the link register was saved on
296 the stack, get it from there. */
297 if (frame
->extra_info
->lr_saved_on_stack
)
298 return read_memory_integer (frame
->frame
+ 8, 4);
300 /* Otherwise, it's still in LR.
301 However, if FRAME isn't the youngest frame, this is kind of
302 suspicious --- if this frame called somebody else, then its LR
303 has certainly been overwritten. */
305 return read_register (lr_regnum
);
307 /* By default, assume it's saved in the standard place, relative to
308 the frame pointer. */
309 return read_memory_integer (frame
->frame
+ 8, 4);
313 /* Return true if REG is a caller-saves ("scratch") register,
316 is_caller_saves_reg (int reg
)
318 return ((4 <= reg
&& reg
<= 7)
319 || (14 <= reg
&& reg
<= 15)
320 || (32 <= reg
&& reg
<= 47));
324 /* Return true if REG is a callee-saves register, false otherwise. */
326 is_callee_saves_reg (int reg
)
328 return ((16 <= reg
&& reg
<= 31)
329 || (48 <= reg
&& reg
<= 63));
333 /* Return true if REG is an argument register, false otherwise. */
335 is_argument_reg (int reg
)
337 return (8 <= reg
&& reg
<= 13);
341 /* Scan an FR-V prologue, starting at PC, until frame->PC.
342 If FRAME is non-zero, fill in its saved_regs with appropriate addresses.
343 We assume FRAME's saved_regs array has already been allocated and cleared.
344 Return the first PC value after the prologue.
346 Note that, for unoptimized code, we almost don't need this function
347 at all; all arguments and locals live on the stack, so we just need
348 the FP to find everything. The catch: structures passed by value
349 have their addresses living in registers; they're never spilled to
350 the stack. So if you ever want to be able to get to these
351 arguments in any frame but the top, you'll need to do this serious
352 prologue analysis. */
354 frv_analyze_prologue (CORE_ADDR pc
, struct frame_info
*frame
)
356 /* When writing out instruction bitpatterns, we use the following
357 letters to label instruction fields:
358 P - The parallel bit. We don't use this.
359 J - The register number of GRj in the instruction description.
360 K - The register number of GRk in the instruction description.
361 I - The register number of GRi.
362 S - a signed imediate offset.
363 U - an unsigned immediate offset.
365 The dots below the numbers indicate where hex digit boundaries
366 fall, to make it easier to check the numbers. */
368 /* Non-zero iff we've seen the instruction that initializes the
369 frame pointer for this function's frame. */
372 /* If fp_set is non_zero, then this is the distance from
373 the stack pointer to frame pointer: fp = sp + fp_offset. */
376 /* Total size of frame prior to any alloca operations. */
379 /* The number of the general-purpose register we saved the return
380 address ("link register") in, or -1 if we haven't moved it yet. */
381 int lr_save_reg
= -1;
383 /* Non-zero iff we've saved the LR onto the stack. */
384 int lr_saved_on_stack
= 0;
386 /* If gr_saved[i] is non-zero, then we've noticed that general
387 register i has been saved at gr_sp_offset[i] from the stack
390 int gr_sp_offset
[64];
392 memset (gr_saved
, 0, sizeof (gr_saved
));
394 while (! frame
|| pc
< frame
->pc
)
396 LONGEST op
= read_memory_integer (pc
, 4);
398 /* The tests in this chain of ifs should be in order of
399 decreasing selectivity, so that more particular patterns get
400 to fire before less particular patterns. */
402 /* Setting the FP from the SP:
404 P 000010 0100010 000001 000000000000 = 0x04881000
405 0 111111 1111111 111111 111111111111 = 0x7fffffff
407 We treat this as part of the prologue. */
408 if ((op
& 0x7fffffff) == 0x04881000)
414 /* Move the link register to the scratch register grJ, before saving:
416 P 000100 0000011 010000 000111 JJJJJJ = 0x080d01c0
417 0 111111 1111111 111111 111111 000000 = 0x7fffffc0
419 We treat this as part of the prologue. */
420 else if ((op
& 0x7fffffc0) == 0x080d01c0)
422 int gr_j
= op
& 0x3f;
424 /* If we're moving it to a scratch register, that's fine. */
425 if (is_caller_saves_reg (gr_j
))
427 /* Otherwise it's not a prologue instruction that we
433 /* To save multiple callee-saves registers on the stack, at
437 P KKKKKK 0000011 000001 000011 000000 = 0x000c10c0
438 0 000000 1111111 111111 111111 111111 = 0x01ffffff
441 P KKKKKK 0000011 000001 000100 000000 = 0x000c1100
442 0 000000 1111111 111111 111111 111111 = 0x01ffffff
444 We treat this as part of the prologue, and record the register's
445 saved address in the frame structure. */
446 else if ((op
& 0x01ffffff) == 0x000c10c0
447 || (op
& 0x01ffffff) == 0x000c1100)
449 int gr_k
= ((op
>> 25) & 0x3f);
450 int ope
= ((op
>> 6) & 0x3f);
454 /* Is it an std or an stq? */
460 /* Is it really a callee-saves register? */
461 if (is_callee_saves_reg (gr_k
))
463 for (i
= 0; i
< count
; i
++)
465 gr_saved
[gr_k
+ i
] = 1;
466 gr_sp_offset
[gr_k
+ i
] = 4 * i
;
470 /* It's not a prologue instruction. */
474 /* Adjusting the stack pointer. (The stack pointer is GR1.)
476 P 000001 0010000 000001 SSSSSSSSSSSS = 0x02401000
477 0 111111 1111111 111111 000000000000 = 0x7ffff000
479 We treat this as part of the prologue. */
480 else if ((op
& 0x7ffff000) == 0x02401000)
482 /* Sign-extend the twelve-bit field.
483 (Isn't there a better way to do this?) */
484 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
489 /* Setting the FP to a constant distance from the SP:
491 P 000010 0010000 000001 SSSSSSSSSSSS = 0x04401000
492 0 111111 1111111 111111 000000000000 = 0x7ffff000
494 We treat this as part of the prologue. */
495 else if ((op
& 0x7ffff000) == 0x04401000)
497 /* Sign-extend the twelve-bit field.
498 (Isn't there a better way to do this?) */
499 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
504 /* To spill an argument register to a scratch register:
506 P KKKKKK 0100010 IIIIII 000000000000 = 0x00880000
507 0 000000 1111111 000000 111111111111 = 0x01fc0fff
509 For the time being, we treat this as a prologue instruction,
510 assuming that GRi is an argument register. This one's kind
511 of suspicious, because it seems like it could be part of a
512 legitimate body instruction. But we only come here when the
513 source info wasn't helpful, so we have to do the best we can.
514 Hopefully once GCC and GDB agree on how to emit line number
515 info for prologues, then this code will never come into play. */
516 else if ((op
& 0x01fc0fff) == 0x00880000)
518 int gr_i
= ((op
>> 12) & 0x3f);
520 /* If the source isn't an arg register, then this isn't a
521 prologue instruction. */
522 if (! is_argument_reg (gr_i
))
526 /* To spill 16-bit values to the stack:
528 P KKKKKK 1010001 000010 SSSSSSSSSSSS = 0x01442000
529 0 000000 1111111 111111 000000000000 = 0x01fff000
531 And for 8-bit values, we use STB instructions.
533 P KKKKKK 1010000 000010 SSSSSSSSSSSS = 0x01402000
534 0 000000 1111111 111111 000000000000 = 0x01fff000
536 We check that GRk is really an argument register, and treat
537 all such as part of the prologue. */
538 else if ( (op
& 0x01fff000) == 0x01442000
539 || (op
& 0x01fff000) == 0x01402000)
541 int gr_k
= ((op
>> 25) & 0x3f);
543 if (! is_argument_reg (gr_k
))
544 break; /* Source isn't an arg register. */
547 /* To save multiple callee-saves register on the stack, at a
551 P KKKKKK 1010011 000001 SSSSSSSSSSSS = 0x014c1000
552 0 000000 1111111 111111 000000000000 = 0x01fff000
555 P KKKKKK 1010100 000001 SSSSSSSSSSSS = 0x01501000
556 0 000000 1111111 111111 000000000000 = 0x01fff000
558 We treat this as part of the prologue, and record the register's
559 saved address in the frame structure. */
560 else if ((op
& 0x01fff000) == 0x014c1000
561 || (op
& 0x01fff000) == 0x01501000)
563 int gr_k
= ((op
>> 25) & 0x3f);
567 /* Is it a stdi or a stqi? */
568 if ((op
& 0x01fff000) == 0x014c1000)
573 /* Is it really a callee-saves register? */
574 if (is_callee_saves_reg (gr_k
))
576 /* Sign-extend the twelve-bit field.
577 (Isn't there a better way to do this?) */
578 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
580 for (i
= 0; i
< count
; i
++)
582 gr_saved
[gr_k
+ i
] = 1;
583 gr_sp_offset
[gr_k
+ i
] = s
+ (4 * i
);
587 /* It's not a prologue instruction. */
591 /* Storing any kind of integer register at any constant offset
592 from any other register.
595 P KKKKKK 0000011 IIIIII 000010 000000 = 0x000c0080
596 0 000000 1111111 000000 111111 111111 = 0x01fc0fff
599 P KKKKKK 1010010 IIIIII SSSSSSSSSSSS = 0x01480000
600 0 000000 1111111 000000 000000000000 = 0x01fc0000
602 These could be almost anything, but a lot of prologue
603 instructions fall into this pattern, so let's decode the
604 instruction once, and then work at a higher level. */
605 else if (((op
& 0x01fc0fff) == 0x000c0080)
606 || ((op
& 0x01fc0000) == 0x01480000))
608 int gr_k
= ((op
>> 25) & 0x3f);
609 int gr_i
= ((op
>> 12) & 0x3f);
612 /* Are we storing with gr0 as an offset, or using an
614 if ((op
& 0x01fc0fff) == 0x000c0080)
617 offset
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
619 /* If the address isn't relative to the SP or FP, it's not a
620 prologue instruction. */
621 if (gr_i
!= sp_regnum
&& gr_i
!= fp_regnum
)
624 /* Saving the old FP in the new frame (relative to the SP). */
625 if (gr_k
== fp_regnum
&& gr_i
== sp_regnum
)
628 /* Saving callee-saves register(s) on the stack, relative to
630 else if (gr_i
== sp_regnum
631 && is_callee_saves_reg (gr_k
))
634 gr_sp_offset
[gr_k
] = offset
;
637 /* Saving the scratch register holding the return address. */
638 else if (lr_save_reg
!= -1
639 && gr_k
== lr_save_reg
)
640 lr_saved_on_stack
= 1;
642 /* Spilling int-sized arguments to the stack. */
643 else if (is_argument_reg (gr_k
))
646 /* It's not a store instruction we recognize, so this must
647 be the end of the prologue. */
652 /* It's not any instruction we recognize, so this must be the end
662 frame
->extra_info
->lr_saved_on_stack
= lr_saved_on_stack
;
664 /* If we know the relationship between the stack and frame
665 pointers, record the addresses of the registers we noticed.
666 Note that we have to do this as a separate step at the end,
667 because instructions may save relative to the SP, but we need
668 their addresses relative to the FP. */
673 for (i
= 0; i
< 64; i
++)
675 frame
->saved_regs
[i
] = (frame
->frame
676 - fp_offset
+ gr_sp_offset
[i
]);
678 frame
->extra_info
->fp_to_callers_sp_offset
= framesize
- fp_offset
;
687 frv_skip_prologue (CORE_ADDR pc
)
689 CORE_ADDR func_addr
, func_end
, new_pc
;
693 /* If the line table has entry for a line *within* the function
694 (i.e., not in the prologue, and not past the end), then that's
696 if (find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
698 struct symtab_and_line sal
;
700 sal
= find_pc_line (func_addr
, 0);
702 if (sal
.line
!= 0 && sal
.end
< func_end
)
708 /* The FR-V prologue is at least five instructions long (twenty bytes).
709 If we didn't find a real source location past that, then
710 do a full analysis of the prologue. */
711 if (new_pc
< pc
+ 20)
712 new_pc
= frv_analyze_prologue (pc
, 0);
718 frv_frame_init_saved_regs (struct frame_info
*frame
)
720 if (frame
->saved_regs
)
723 frame_saved_regs_zalloc (frame
);
724 frame
->saved_regs
[fp_regnum
] = frame
->frame
;
726 /* Find the beginning of this function, so we can analyze its
729 CORE_ADDR func_addr
, func_end
;
731 if (find_pc_partial_function (frame
->pc
, NULL
, &func_addr
, &func_end
))
732 frv_analyze_prologue (func_addr
, frame
);
737 frv_extract_return_value (struct type
*type
, char *regbuf
, char *valbuf
)
739 memcpy (valbuf
, (regbuf
740 + frv_register_byte (8)
741 + (TYPE_LENGTH (type
) < 4 ? 4 - TYPE_LENGTH (type
) : 0)),
746 frv_extract_struct_value_address (char *regbuf
)
748 return extract_unsigned_integer (regbuf
+ frv_register_byte (struct_return_regnum
),
753 frv_store_struct_return (CORE_ADDR addr
, CORE_ADDR sp
)
755 write_register (struct_return_regnum
, addr
);
759 frv_frameless_function_invocation (struct frame_info
*frame
)
761 return frameless_look_for_prologue (frame
);
765 frv_saved_pc_after_call (struct frame_info
*frame
)
767 return read_register (lr_regnum
);
771 frv_init_extra_frame_info (int fromleaf
, struct frame_info
*frame
)
773 frame_extra_info_zalloc (frame
, sizeof (struct frame_extra_info
));
774 frame
->extra_info
->fp_to_callers_sp_offset
= 0;
775 frame
->extra_info
->lr_saved_on_stack
= 0;
778 #define ROUND_UP(n,a) (((n)+(a)-1) & ~((a)-1))
779 #define ROUND_DOWN(n,a) ((n) & ~((a)-1))
782 frv_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
783 int struct_return
, CORE_ADDR struct_addr
)
790 struct type
*arg_type
;
792 enum type_code typecode
;
798 printf("Push %d args at sp = %x, struct_return=%d (%x)\n",
799 nargs
, (int) sp
, struct_return
, struct_addr
);
803 for (argnum
= 0; argnum
< nargs
; ++argnum
)
804 stack_space
+= ROUND_UP (TYPE_LENGTH (VALUE_TYPE (args
[argnum
])), 4);
806 stack_space
-= (6 * 4);
810 /* Make sure stack is dword aligned. */
811 sp
= ROUND_DOWN (sp
, 8);
818 write_register (struct_return_regnum
, struct_addr
);
820 for (argnum
= 0; argnum
< nargs
; ++argnum
)
823 arg_type
= check_typedef (VALUE_TYPE (arg
));
824 len
= TYPE_LENGTH (arg_type
);
825 typecode
= TYPE_CODE (arg_type
);
827 if (typecode
== TYPE_CODE_STRUCT
|| typecode
== TYPE_CODE_UNION
)
829 store_unsigned_integer (valbuf
, 4, VALUE_ADDRESS (arg
));
830 typecode
= TYPE_CODE_PTR
;
836 val
= (char *) VALUE_CONTENTS (arg
);
841 int partial_len
= (len
< 4 ? len
: 4);
845 regval
= extract_unsigned_integer (val
, partial_len
);
847 printf(" Argnum %d data %x -> reg %d\n",
848 argnum
, (int) regval
, argreg
);
850 write_register (argreg
, regval
);
856 printf(" Argnum %d data %x -> offset %d (%x)\n",
857 argnum
, *((int *)val
), stack_offset
, (int) (sp
+ stack_offset
));
859 write_memory (sp
+ stack_offset
, val
, partial_len
);
860 stack_offset
+= ROUND_UP(partial_len
, 4);
870 frv_push_return_address (CORE_ADDR pc
, CORE_ADDR sp
)
872 write_register (lr_regnum
, CALL_DUMMY_ADDRESS ());
877 frv_store_return_value (struct type
*type
, char *valbuf
)
879 int length
= TYPE_LENGTH (type
);
880 int reg8_offset
= frv_register_byte (8);
883 deprecated_write_register_bytes (reg8_offset
+ (4 - length
), valbuf
,
885 else if (length
== 8)
886 deprecated_write_register_bytes (reg8_offset
, valbuf
, length
);
888 internal_error (__FILE__
, __LINE__
,
889 "Don't know how to return a %d-byte value.", length
);
895 generic_pop_current_frame (frv_pop_frame_regular
);
899 frv_pop_frame_regular (struct frame_info
*frame
)
906 frv_frame_init_saved_regs (frame
);
908 write_register (pc_regnum
, frv_frame_saved_pc (frame
));
909 for (regno
= 0; regno
< frv_num_regs
; ++regno
)
911 if (frame
->saved_regs
[regno
]
912 && regno
!= pc_regnum
913 && regno
!= sp_regnum
)
915 write_register (regno
,
916 read_memory_integer (frame
->saved_regs
[regno
], 4));
919 write_register (sp_regnum
, fp
+ frame
->extra_info
->fp_to_callers_sp_offset
);
920 flush_cached_frames ();
925 frv_remote_translate_xfer_address (CORE_ADDR memaddr
, int nr_bytes
,
926 CORE_ADDR
*targ_addr
, int *targ_len
)
928 *targ_addr
= memaddr
;
929 *targ_len
= nr_bytes
;
933 /* Hardware watchpoint / breakpoint support for the FR500
937 frv_check_watch_resources (int type
, int cnt
, int ot
)
939 struct gdbarch_tdep
*var
= CURRENT_VARIANT
;
941 /* Watchpoints not supported on simulator. */
942 if (strcmp (target_shortname
, "sim") == 0)
945 if (type
== bp_hardware_breakpoint
)
947 if (var
->num_hw_breakpoints
== 0)
949 else if (cnt
<= var
->num_hw_breakpoints
)
954 if (var
->num_hw_watchpoints
== 0)
958 else if (cnt
<= var
->num_hw_watchpoints
)
966 frv_stopped_data_address (void)
968 CORE_ADDR brr
, dbar0
, dbar1
, dbar2
, dbar3
;
970 brr
= read_register (brr_regnum
);
971 dbar0
= read_register (dbar0_regnum
);
972 dbar1
= read_register (dbar1_regnum
);
973 dbar2
= read_register (dbar2_regnum
);
974 dbar3
= read_register (dbar3_regnum
);
978 else if (brr
& (1<<10))
980 else if (brr
& (1<<9))
982 else if (brr
& (1<<8))
988 static struct gdbarch
*
989 frv_gdbarch_init (struct gdbarch_info info
, struct gdbarch_list
*arches
)
991 struct gdbarch
*gdbarch
;
992 struct gdbarch_tdep
*var
;
994 /* Check to see if we've already built an appropriate architecture
995 object for this executable. */
996 arches
= gdbarch_list_lookup_by_info (arches
, &info
);
998 return arches
->gdbarch
;
1000 /* Select the right tdep structure for this variant. */
1001 var
= new_variant ();
1002 switch (info
.bfd_arch_info
->mach
)
1005 case bfd_mach_frvsimple
:
1006 case bfd_mach_fr500
:
1007 case bfd_mach_frvtomcat
:
1008 set_variant_num_gprs (var
, 64);
1009 set_variant_num_fprs (var
, 64);
1012 case bfd_mach_fr400
:
1013 set_variant_num_gprs (var
, 32);
1014 set_variant_num_fprs (var
, 32);
1018 /* Never heard of this variant. */
1022 gdbarch
= gdbarch_alloc (&info
, var
);
1024 /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
1025 ready to unwind the PC first (see frame.c:get_prev_frame()). */
1026 set_gdbarch_deprecated_init_frame_pc (gdbarch
, init_frame_pc_default
);
1028 set_gdbarch_short_bit (gdbarch
, 16);
1029 set_gdbarch_int_bit (gdbarch
, 32);
1030 set_gdbarch_long_bit (gdbarch
, 32);
1031 set_gdbarch_long_long_bit (gdbarch
, 64);
1032 set_gdbarch_float_bit (gdbarch
, 32);
1033 set_gdbarch_double_bit (gdbarch
, 64);
1034 set_gdbarch_long_double_bit (gdbarch
, 64);
1035 set_gdbarch_ptr_bit (gdbarch
, 32);
1037 set_gdbarch_num_regs (gdbarch
, frv_num_regs
);
1038 set_gdbarch_sp_regnum (gdbarch
, sp_regnum
);
1039 set_gdbarch_deprecated_fp_regnum (gdbarch
, fp_regnum
);
1040 set_gdbarch_pc_regnum (gdbarch
, pc_regnum
);
1042 set_gdbarch_register_name (gdbarch
, frv_register_name
);
1043 set_gdbarch_deprecated_register_size (gdbarch
, 4);
1044 set_gdbarch_deprecated_register_bytes (gdbarch
, frv_num_regs
* 4);
1045 set_gdbarch_deprecated_register_byte (gdbarch
, frv_register_byte
);
1046 set_gdbarch_deprecated_register_raw_size (gdbarch
, frv_register_raw_size
);
1047 set_gdbarch_deprecated_max_register_raw_size (gdbarch
, 4);
1048 set_gdbarch_deprecated_register_virtual_size (gdbarch
, frv_register_virtual_size
);
1049 set_gdbarch_deprecated_max_register_virtual_size (gdbarch
, 4);
1050 set_gdbarch_deprecated_register_virtual_type (gdbarch
, frv_register_virtual_type
);
1052 set_gdbarch_skip_prologue (gdbarch
, frv_skip_prologue
);
1053 set_gdbarch_breakpoint_from_pc (gdbarch
, frv_breakpoint_from_pc
);
1055 set_gdbarch_frame_args_skip (gdbarch
, 0);
1056 set_gdbarch_frameless_function_invocation (gdbarch
, frv_frameless_function_invocation
);
1058 set_gdbarch_deprecated_saved_pc_after_call (gdbarch
, frv_saved_pc_after_call
);
1060 set_gdbarch_deprecated_frame_chain (gdbarch
, frv_frame_chain
);
1061 set_gdbarch_deprecated_frame_saved_pc (gdbarch
, frv_frame_saved_pc
);
1063 set_gdbarch_deprecated_frame_init_saved_regs (gdbarch
, frv_frame_init_saved_regs
);
1065 set_gdbarch_use_struct_convention (gdbarch
, always_use_struct_convention
);
1066 set_gdbarch_deprecated_extract_return_value (gdbarch
, frv_extract_return_value
);
1068 set_gdbarch_deprecated_store_struct_return (gdbarch
, frv_store_struct_return
);
1069 set_gdbarch_deprecated_store_return_value (gdbarch
, frv_store_return_value
);
1070 set_gdbarch_deprecated_extract_struct_value_address (gdbarch
, frv_extract_struct_value_address
);
1072 /* Settings for calling functions in the inferior. */
1073 set_gdbarch_deprecated_push_arguments (gdbarch
, frv_push_arguments
);
1074 set_gdbarch_deprecated_push_return_address (gdbarch
, frv_push_return_address
);
1075 set_gdbarch_deprecated_pop_frame (gdbarch
, frv_pop_frame
);
1077 set_gdbarch_deprecated_call_dummy_words (gdbarch
, frv_call_dummy_words
);
1078 set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch
, sizeof (frv_call_dummy_words
));
1079 set_gdbarch_deprecated_init_extra_frame_info (gdbarch
, frv_init_extra_frame_info
);
1081 /* Settings that should be unnecessary. */
1082 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1084 set_gdbarch_write_pc (gdbarch
, generic_target_write_pc
);
1085 set_gdbarch_deprecated_dummy_write_sp (gdbarch
, deprecated_write_sp
);
1087 set_gdbarch_deprecated_pc_in_call_dummy (gdbarch
, deprecated_pc_in_call_dummy_at_entry_point
);
1089 set_gdbarch_decr_pc_after_break (gdbarch
, 0);
1090 set_gdbarch_function_start_offset (gdbarch
, 0);
1092 set_gdbarch_remote_translate_xfer_address
1093 (gdbarch
, frv_remote_translate_xfer_address
);
1095 /* Hardware watchpoint / breakpoint support. */
1096 switch (info
.bfd_arch_info
->mach
)
1099 case bfd_mach_frvsimple
:
1100 case bfd_mach_fr500
:
1101 case bfd_mach_frvtomcat
:
1102 /* fr500-style hardware debugging support. */
1103 var
->num_hw_watchpoints
= 4;
1104 var
->num_hw_breakpoints
= 4;
1107 case bfd_mach_fr400
:
1108 /* fr400-style hardware debugging support. */
1109 var
->num_hw_watchpoints
= 2;
1110 var
->num_hw_breakpoints
= 4;
1114 /* Otherwise, assume we don't have hardware debugging support. */
1115 var
->num_hw_watchpoints
= 0;
1116 var
->num_hw_breakpoints
= 0;
1124 _initialize_frv_tdep (void)
1126 register_gdbarch_init (bfd_arch_frv
, frv_gdbarch_init
);
1128 deprecated_tm_print_insn
= print_insn_frv
;