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_skip_prologue_ftype frv_skip_prologue
;
39 static gdbarch_deprecated_extract_return_value_ftype frv_extract_return_value
;
40 static gdbarch_deprecated_extract_struct_value_address_ftype frv_extract_struct_value_address
;
41 static gdbarch_use_struct_convention_ftype frv_use_struct_convention
;
42 static gdbarch_frameless_function_invocation_ftype frv_frameless_function_invocation
;
43 static gdbarch_init_extra_frame_info_ftype stupid_useless_init_extra_frame_info
;
44 static gdbarch_store_struct_return_ftype frv_store_struct_return
;
45 static gdbarch_push_arguments_ftype frv_push_arguments
;
46 static gdbarch_push_return_address_ftype frv_push_return_address
;
47 static gdbarch_saved_pc_after_call_ftype frv_saved_pc_after_call
;
49 static void frv_pop_frame_regular (struct frame_info
*frame
);
51 /* Register numbers. You can change these as needed, but don't forget
52 to update the simulator accordingly. */
54 /* The total number of registers we know exist. */
57 /* Register numbers 0 -- 63 are always reserved for general-purpose
58 registers. The chip at hand may have less. */
62 struct_return_regnum
= 3,
65 /* Register numbers 64 -- 127 are always reserved for floating-point
66 registers. The chip at hand may have less. */
67 first_fpr_regnum
= 64,
68 last_fpr_regnum
= 127,
70 /* Register numbers 128 on up are always reserved for special-purpose
72 first_spr_regnum
= 128,
88 static LONGEST frv_call_dummy_words
[] =
92 /* The contents of this structure can only be trusted after we've
93 frv_frame_init_saved_regs on the frame. */
94 struct frame_extra_info
96 /* The offset from our frame pointer to our caller's stack
98 int fp_to_callers_sp_offset
;
100 /* Non-zero if we've saved our return address on the stack yet.
101 Zero if it's still sitting in the link register. */
102 int lr_saved_on_stack
;
106 /* A structure describing a particular variant of the FRV.
107 We allocate and initialize one of these structures when we create
108 the gdbarch object for a variant.
110 At the moment, all the FR variants we support differ only in which
111 registers are present; the portable code of GDB knows that
112 registers whose names are the empty string don't exist, so the
113 `register_names' array captures all the per-variant information we
116 in the future, if we need to have per-variant maps for raw size,
117 virtual type, etc., we should replace register_names with an array
118 of structures, each of which gives all the necessary info for one
119 register. Don't stick parallel arrays in here --- that's so
123 /* How many general-purpose registers does this variant have? */
126 /* How many floating-point registers does this variant have? */
129 /* How many hardware watchpoints can it support? */
130 int num_hw_watchpoints
;
132 /* How many hardware breakpoints can it support? */
133 int num_hw_breakpoints
;
135 /* Register names. */
136 char **register_names
;
139 #define CURRENT_VARIANT (gdbarch_tdep (current_gdbarch))
142 /* Allocate a new variant structure, and set up default values for all
144 static struct gdbarch_tdep
*
147 struct gdbarch_tdep
*var
;
151 var
= xmalloc (sizeof (*var
));
152 memset (var
, 0, sizeof (*var
));
156 var
->num_hw_watchpoints
= 0;
157 var
->num_hw_breakpoints
= 0;
159 /* By default, don't supply any general-purpose or floating-point
161 var
->register_names
= (char **) xmalloc (frv_num_regs
* sizeof (char *));
162 for (r
= 0; r
< frv_num_regs
; r
++)
163 var
->register_names
[r
] = "";
165 /* Do, however, supply default names for the special-purpose
167 for (r
= first_spr_regnum
; r
<= last_spr_regnum
; ++r
)
169 sprintf (buf
, "x%d", r
);
170 var
->register_names
[r
] = xstrdup (buf
);
173 var
->register_names
[pc_regnum
] = "pc";
174 var
->register_names
[lr_regnum
] = "lr";
175 var
->register_names
[lcr_regnum
] = "lcr";
177 var
->register_names
[psr_regnum
] = "psr";
178 var
->register_names
[ccr_regnum
] = "ccr";
179 var
->register_names
[cccr_regnum
] = "cccr";
180 var
->register_names
[tbr_regnum
] = "tbr";
182 /* Debug registers. */
183 var
->register_names
[brr_regnum
] = "brr";
184 var
->register_names
[dbar0_regnum
] = "dbar0";
185 var
->register_names
[dbar1_regnum
] = "dbar1";
186 var
->register_names
[dbar2_regnum
] = "dbar2";
187 var
->register_names
[dbar3_regnum
] = "dbar3";
193 /* Indicate that the variant VAR has NUM_GPRS general-purpose
194 registers, and fill in the names array appropriately. */
196 set_variant_num_gprs (struct gdbarch_tdep
*var
, int num_gprs
)
200 var
->num_gprs
= num_gprs
;
202 for (r
= 0; r
< num_gprs
; ++r
)
206 sprintf (buf
, "gr%d", r
);
207 var
->register_names
[first_gpr_regnum
+ r
] = xstrdup (buf
);
212 /* Indicate that the variant VAR has NUM_FPRS floating-point
213 registers, and fill in the names array appropriately. */
215 set_variant_num_fprs (struct gdbarch_tdep
*var
, int num_fprs
)
219 var
->num_fprs
= num_fprs
;
221 for (r
= 0; r
< num_fprs
; ++r
)
225 sprintf (buf
, "fr%d", r
);
226 var
->register_names
[first_fpr_regnum
+ r
] = xstrdup (buf
);
232 frv_register_name (int reg
)
236 if (reg
>= frv_num_regs
)
239 return CURRENT_VARIANT
->register_names
[reg
];
244 frv_register_raw_size (int reg
)
250 frv_register_virtual_size (int reg
)
256 frv_register_virtual_type (int reg
)
258 if (reg
>= 64 && reg
<= 127)
259 return builtin_type_float
;
261 return builtin_type_int
;
265 frv_register_byte (int reg
)
270 static const unsigned char *
271 frv_breakpoint_from_pc (CORE_ADDR
*pcptr
, int *lenp
)
273 static unsigned char breakpoint
[] = {0xc0, 0x70, 0x00, 0x01};
274 *lenp
= sizeof (breakpoint
);
279 frv_frame_chain (struct frame_info
*frame
)
281 CORE_ADDR saved_fp_addr
;
283 if (frame
->saved_regs
&& frame
->saved_regs
[fp_regnum
] != 0)
284 saved_fp_addr
= frame
->saved_regs
[fp_regnum
];
286 /* Just assume it was saved in the usual place. */
287 saved_fp_addr
= frame
->frame
;
289 return read_memory_integer (saved_fp_addr
, 4);
293 frv_frame_saved_pc (struct frame_info
*frame
)
295 frv_frame_init_saved_regs (frame
);
297 /* Perhaps the prologue analyzer recorded where it was stored.
298 (As of 14 Oct 2001, it never does.) */
299 if (frame
->saved_regs
&& frame
->saved_regs
[pc_regnum
] != 0)
300 return read_memory_integer (frame
->saved_regs
[pc_regnum
], 4);
302 /* If the prologue analyzer tells us the link register was saved on
303 the stack, get it from there. */
304 if (frame
->extra_info
->lr_saved_on_stack
)
305 return read_memory_integer (frame
->frame
+ 8, 4);
307 /* Otherwise, it's still in LR.
308 However, if FRAME isn't the youngest frame, this is kind of
309 suspicious --- if this frame called somebody else, then its LR
310 has certainly been overwritten. */
312 return read_register (lr_regnum
);
314 /* By default, assume it's saved in the standard place, relative to
315 the frame pointer. */
316 return read_memory_integer (frame
->frame
+ 8, 4);
320 /* Return true if REG is a caller-saves ("scratch") register,
323 is_caller_saves_reg (int reg
)
325 return ((4 <= reg
&& reg
<= 7)
326 || (14 <= reg
&& reg
<= 15)
327 || (32 <= reg
&& reg
<= 47));
331 /* Return true if REG is a callee-saves register, false otherwise. */
333 is_callee_saves_reg (int reg
)
335 return ((16 <= reg
&& reg
<= 31)
336 || (48 <= reg
&& reg
<= 63));
340 /* Return true if REG is an argument register, false otherwise. */
342 is_argument_reg (int reg
)
344 return (8 <= reg
&& reg
<= 13);
348 /* Scan an FR-V prologue, starting at PC, until frame->PC.
349 If FRAME is non-zero, fill in its saved_regs with appropriate addresses.
350 We assume FRAME's saved_regs array has already been allocated and cleared.
351 Return the first PC value after the prologue.
353 Note that, for unoptimized code, we almost don't need this function
354 at all; all arguments and locals live on the stack, so we just need
355 the FP to find everything. The catch: structures passed by value
356 have their addresses living in registers; they're never spilled to
357 the stack. So if you ever want to be able to get to these
358 arguments in any frame but the top, you'll need to do this serious
359 prologue analysis. */
361 frv_analyze_prologue (CORE_ADDR pc
, struct frame_info
*frame
)
363 /* When writing out instruction bitpatterns, we use the following
364 letters to label instruction fields:
365 P - The parallel bit. We don't use this.
366 J - The register number of GRj in the instruction description.
367 K - The register number of GRk in the instruction description.
368 I - The register number of GRi.
369 S - a signed imediate offset.
370 U - an unsigned immediate offset.
372 The dots below the numbers indicate where hex digit boundaries
373 fall, to make it easier to check the numbers. */
375 /* Non-zero iff we've seen the instruction that initializes the
376 frame pointer for this function's frame. */
379 /* If fp_set is non_zero, then this is the distance from
380 the stack pointer to frame pointer: fp = sp + fp_offset. */
383 /* Total size of frame prior to any alloca operations. */
386 /* The number of the general-purpose register we saved the return
387 address ("link register") in, or -1 if we haven't moved it yet. */
388 int lr_save_reg
= -1;
390 /* Non-zero iff we've saved the LR onto the stack. */
391 int lr_saved_on_stack
= 0;
393 /* If gr_saved[i] is non-zero, then we've noticed that general
394 register i has been saved at gr_sp_offset[i] from the stack
397 int gr_sp_offset
[64];
399 memset (gr_saved
, 0, sizeof (gr_saved
));
401 while (! frame
|| pc
< frame
->pc
)
403 LONGEST op
= read_memory_integer (pc
, 4);
405 /* The tests in this chain of ifs should be in order of
406 decreasing selectivity, so that more particular patterns get
407 to fire before less particular patterns. */
409 /* Setting the FP from the SP:
411 P 000010 0100010 000001 000000000000 = 0x04881000
412 0 111111 1111111 111111 111111111111 = 0x7fffffff
414 We treat this as part of the prologue. */
415 if ((op
& 0x7fffffff) == 0x04881000)
421 /* Move the link register to the scratch register grJ, before saving:
423 P 000100 0000011 010000 000111 JJJJJJ = 0x080d01c0
424 0 111111 1111111 111111 111111 000000 = 0x7fffffc0
426 We treat this as part of the prologue. */
427 else if ((op
& 0x7fffffc0) == 0x080d01c0)
429 int gr_j
= op
& 0x3f;
431 /* If we're moving it to a scratch register, that's fine. */
432 if (is_caller_saves_reg (gr_j
))
434 /* Otherwise it's not a prologue instruction that we
440 /* To save multiple callee-saves registers on the stack, at
444 P KKKKKK 0000011 000001 000011 000000 = 0x000c10c0
445 0 000000 1111111 111111 111111 111111 = 0x01ffffff
448 P KKKKKK 0000011 000001 000100 000000 = 0x000c1100
449 0 000000 1111111 111111 111111 111111 = 0x01ffffff
451 We treat this as part of the prologue, and record the register's
452 saved address in the frame structure. */
453 else if ((op
& 0x01ffffff) == 0x000c10c0
454 || (op
& 0x01ffffff) == 0x000c1100)
456 int gr_k
= ((op
>> 25) & 0x3f);
457 int ope
= ((op
>> 6) & 0x3f);
461 /* Is it an std or an stq? */
467 /* Is it really a callee-saves register? */
468 if (is_callee_saves_reg (gr_k
))
470 for (i
= 0; i
< count
; i
++)
472 gr_saved
[gr_k
+ i
] = 1;
473 gr_sp_offset
[gr_k
+ i
] = 4 * i
;
477 /* It's not a prologue instruction. */
481 /* Adjusting the stack pointer. (The stack pointer is GR1.)
483 P 000001 0010000 000001 SSSSSSSSSSSS = 0x02401000
484 0 111111 1111111 111111 000000000000 = 0x7ffff000
486 We treat this as part of the prologue. */
487 else if ((op
& 0x7ffff000) == 0x02401000)
489 /* Sign-extend the twelve-bit field.
490 (Isn't there a better way to do this?) */
491 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
496 /* Setting the FP to a constant distance from the SP:
498 P 000010 0010000 000001 SSSSSSSSSSSS = 0x04401000
499 0 111111 1111111 111111 000000000000 = 0x7ffff000
501 We treat this as part of the prologue. */
502 else if ((op
& 0x7ffff000) == 0x04401000)
504 /* Sign-extend the twelve-bit field.
505 (Isn't there a better way to do this?) */
506 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
511 /* To spill an argument register to a scratch register:
513 P KKKKKK 0100010 IIIIII 000000000000 = 0x00880000
514 0 000000 1111111 000000 111111111111 = 0x01fc0fff
516 For the time being, we treat this as a prologue instruction,
517 assuming that GRi is an argument register. This one's kind
518 of suspicious, because it seems like it could be part of a
519 legitimate body instruction. But we only come here when the
520 source info wasn't helpful, so we have to do the best we can.
521 Hopefully once GCC and GDB agree on how to emit line number
522 info for prologues, then this code will never come into play. */
523 else if ((op
& 0x01fc0fff) == 0x00880000)
525 int gr_i
= ((op
>> 12) & 0x3f);
527 /* If the source isn't an arg register, then this isn't a
528 prologue instruction. */
529 if (! is_argument_reg (gr_i
))
533 /* To spill 16-bit values to the stack:
535 P KKKKKK 1010001 000010 SSSSSSSSSSSS = 0x01442000
536 0 000000 1111111 111111 000000000000 = 0x01fff000
538 And for 8-bit values, we use STB instructions.
540 P KKKKKK 1010000 000010 SSSSSSSSSSSS = 0x01402000
541 0 000000 1111111 111111 000000000000 = 0x01fff000
543 We check that GRk is really an argument register, and treat
544 all such as part of the prologue. */
545 else if ( (op
& 0x01fff000) == 0x01442000
546 || (op
& 0x01fff000) == 0x01402000)
548 int gr_k
= ((op
>> 25) & 0x3f);
550 if (! is_argument_reg (gr_k
))
551 break; /* Source isn't an arg register. */
554 /* To save multiple callee-saves register on the stack, at a
558 P KKKKKK 1010011 000001 SSSSSSSSSSSS = 0x014c1000
559 0 000000 1111111 111111 000000000000 = 0x01fff000
562 P KKKKKK 1010100 000001 SSSSSSSSSSSS = 0x01501000
563 0 000000 1111111 111111 000000000000 = 0x01fff000
565 We treat this as part of the prologue, and record the register's
566 saved address in the frame structure. */
567 else if ((op
& 0x01fff000) == 0x014c1000
568 || (op
& 0x01fff000) == 0x01501000)
570 int gr_k
= ((op
>> 25) & 0x3f);
574 /* Is it a stdi or a stqi? */
575 if ((op
& 0x01fff000) == 0x014c1000)
580 /* Is it really a callee-saves register? */
581 if (is_callee_saves_reg (gr_k
))
583 /* Sign-extend the twelve-bit field.
584 (Isn't there a better way to do this?) */
585 int s
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
587 for (i
= 0; i
< count
; i
++)
589 gr_saved
[gr_k
+ i
] = 1;
590 gr_sp_offset
[gr_k
+ i
] = s
+ (4 * i
);
594 /* It's not a prologue instruction. */
598 /* Storing any kind of integer register at any constant offset
599 from any other register.
602 P KKKKKK 0000011 IIIIII 000010 000000 = 0x000c0080
603 0 000000 1111111 000000 111111 111111 = 0x01fc0fff
606 P KKKKKK 1010010 IIIIII SSSSSSSSSSSS = 0x01480000
607 0 000000 1111111 000000 000000000000 = 0x01fc0000
609 These could be almost anything, but a lot of prologue
610 instructions fall into this pattern, so let's decode the
611 instruction once, and then work at a higher level. */
612 else if (((op
& 0x01fc0fff) == 0x000c0080)
613 || ((op
& 0x01fc0000) == 0x01480000))
615 int gr_k
= ((op
>> 25) & 0x3f);
616 int gr_i
= ((op
>> 12) & 0x3f);
619 /* Are we storing with gr0 as an offset, or using an
621 if ((op
& 0x01fc0fff) == 0x000c0080)
624 offset
= (((op
& 0xfff) - 0x800) & 0xfff) - 0x800;
626 /* If the address isn't relative to the SP or FP, it's not a
627 prologue instruction. */
628 if (gr_i
!= sp_regnum
&& gr_i
!= fp_regnum
)
631 /* Saving the old FP in the new frame (relative to the SP). */
632 if (gr_k
== fp_regnum
&& gr_i
== sp_regnum
)
635 /* Saving callee-saves register(s) on the stack, relative to
637 else if (gr_i
== sp_regnum
638 && is_callee_saves_reg (gr_k
))
641 gr_sp_offset
[gr_k
] = offset
;
644 /* Saving the scratch register holding the return address. */
645 else if (lr_save_reg
!= -1
646 && gr_k
== lr_save_reg
)
647 lr_saved_on_stack
= 1;
649 /* Spilling int-sized arguments to the stack. */
650 else if (is_argument_reg (gr_k
))
653 /* It's not a store instruction we recognize, so this must
654 be the end of the prologue. */
659 /* It's not any instruction we recognize, so this must be the end
669 frame
->extra_info
->lr_saved_on_stack
= lr_saved_on_stack
;
671 /* If we know the relationship between the stack and frame
672 pointers, record the addresses of the registers we noticed.
673 Note that we have to do this as a separate step at the end,
674 because instructions may save relative to the SP, but we need
675 their addresses relative to the FP. */
680 for (i
= 0; i
< 64; i
++)
682 frame
->saved_regs
[i
] = (frame
->frame
683 - fp_offset
+ gr_sp_offset
[i
]);
685 frame
->extra_info
->fp_to_callers_sp_offset
= framesize
- fp_offset
;
694 frv_skip_prologue (CORE_ADDR pc
)
696 CORE_ADDR func_addr
, func_end
, new_pc
;
700 /* If the line table has entry for a line *within* the function
701 (i.e., not in the prologue, and not past the end), then that's
703 if (find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
705 struct symtab_and_line sal
;
707 sal
= find_pc_line (func_addr
, 0);
709 if (sal
.line
!= 0 && sal
.end
< func_end
)
715 /* The FR-V prologue is at least five instructions long (twenty bytes).
716 If we didn't find a real source location past that, then
717 do a full analysis of the prologue. */
718 if (new_pc
< pc
+ 20)
719 new_pc
= frv_analyze_prologue (pc
, 0);
725 frv_frame_init_saved_regs (struct frame_info
*frame
)
727 if (frame
->saved_regs
)
730 frame_saved_regs_zalloc (frame
);
731 frame
->saved_regs
[fp_regnum
] = frame
->frame
;
733 /* Find the beginning of this function, so we can analyze its
736 CORE_ADDR func_addr
, func_end
;
738 if (find_pc_partial_function (frame
->pc
, NULL
, &func_addr
, &func_end
))
739 frv_analyze_prologue (func_addr
, frame
);
743 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
744 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
745 and TYPE is the type (which is known to be struct, union or array).
747 The frv returns all structs in memory. */
750 frv_use_struct_convention (int gcc_p
, struct type
*type
)
756 frv_extract_return_value (struct type
*type
, char *regbuf
, char *valbuf
)
758 memcpy (valbuf
, (regbuf
759 + frv_register_byte (8)
760 + (TYPE_LENGTH (type
) < 4 ? 4 - TYPE_LENGTH (type
) : 0)),
765 frv_extract_struct_value_address (char *regbuf
)
767 return extract_address (regbuf
+ frv_register_byte (struct_return_regnum
),
772 frv_store_struct_return (CORE_ADDR addr
, CORE_ADDR sp
)
774 write_register (struct_return_regnum
, addr
);
778 frv_frameless_function_invocation (struct frame_info
*frame
)
780 return frameless_look_for_prologue (frame
);
784 frv_saved_pc_after_call (struct frame_info
*frame
)
786 return read_register (lr_regnum
);
790 frv_init_extra_frame_info (int fromleaf
, struct frame_info
*frame
)
792 frame_extra_info_zalloc (frame
, sizeof (struct frame_extra_info
));
793 frame
->extra_info
->fp_to_callers_sp_offset
= 0;
794 frame
->extra_info
->lr_saved_on_stack
= 0;
797 #define ROUND_UP(n,a) (((n)+(a)-1) & ~((a)-1))
798 #define ROUND_DOWN(n,a) ((n) & ~((a)-1))
801 frv_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
802 int struct_return
, CORE_ADDR struct_addr
)
809 struct type
*arg_type
;
811 enum type_code typecode
;
817 printf("Push %d args at sp = %x, struct_return=%d (%x)\n",
818 nargs
, (int) sp
, struct_return
, struct_addr
);
822 for (argnum
= 0; argnum
< nargs
; ++argnum
)
823 stack_space
+= ROUND_UP (TYPE_LENGTH (VALUE_TYPE (args
[argnum
])), 4);
825 stack_space
-= (6 * 4);
829 /* Make sure stack is dword aligned. */
830 sp
= ROUND_DOWN (sp
, 8);
837 write_register (struct_return_regnum
, struct_addr
);
839 for (argnum
= 0; argnum
< nargs
; ++argnum
)
842 arg_type
= check_typedef (VALUE_TYPE (arg
));
843 len
= TYPE_LENGTH (arg_type
);
844 typecode
= TYPE_CODE (arg_type
);
846 if (typecode
== TYPE_CODE_STRUCT
|| typecode
== TYPE_CODE_UNION
)
848 store_address (valbuf
, 4, VALUE_ADDRESS (arg
));
849 typecode
= TYPE_CODE_PTR
;
855 val
= (char *) VALUE_CONTENTS (arg
);
860 int partial_len
= (len
< 4 ? len
: 4);
864 regval
= extract_address (val
, partial_len
);
866 printf(" Argnum %d data %x -> reg %d\n",
867 argnum
, (int) regval
, argreg
);
869 write_register (argreg
, regval
);
875 printf(" Argnum %d data %x -> offset %d (%x)\n",
876 argnum
, *((int *)val
), stack_offset
, (int) (sp
+ stack_offset
));
878 write_memory (sp
+ stack_offset
, val
, partial_len
);
879 stack_offset
+= ROUND_UP(partial_len
, 4);
889 frv_push_return_address (CORE_ADDR pc
, CORE_ADDR sp
)
891 write_register (lr_regnum
, CALL_DUMMY_ADDRESS ());
896 frv_store_return_value (struct type
*type
, char *valbuf
)
898 int length
= TYPE_LENGTH (type
);
899 int reg8_offset
= frv_register_byte (8);
902 deprecated_write_register_bytes (reg8_offset
+ (4 - length
), valbuf
,
904 else if (length
== 8)
905 deprecated_write_register_bytes (reg8_offset
, valbuf
, length
);
907 internal_error (__FILE__
, __LINE__
,
908 "Don't know how to return a %d-byte value.", length
);
914 generic_pop_current_frame (frv_pop_frame_regular
);
918 frv_pop_frame_regular (struct frame_info
*frame
)
925 frv_frame_init_saved_regs (frame
);
927 write_register (pc_regnum
, frv_frame_saved_pc (frame
));
928 for (regno
= 0; regno
< frv_num_regs
; ++regno
)
930 if (frame
->saved_regs
[regno
]
931 && regno
!= pc_regnum
932 && regno
!= sp_regnum
)
934 write_register (regno
,
935 read_memory_integer (frame
->saved_regs
[regno
], 4));
938 write_register (sp_regnum
, fp
+ frame
->extra_info
->fp_to_callers_sp_offset
);
939 flush_cached_frames ();
944 frv_remote_translate_xfer_address (CORE_ADDR memaddr
, int nr_bytes
,
945 CORE_ADDR
*targ_addr
, int *targ_len
)
947 *targ_addr
= memaddr
;
948 *targ_len
= nr_bytes
;
952 /* Hardware watchpoint / breakpoint support for the FR500
956 frv_check_watch_resources (int type
, int cnt
, int ot
)
958 struct gdbarch_tdep
*var
= CURRENT_VARIANT
;
960 /* Watchpoints not supported on simulator. */
961 if (strcmp (target_shortname
, "sim") == 0)
964 if (type
== bp_hardware_breakpoint
)
966 if (var
->num_hw_breakpoints
== 0)
968 else if (cnt
<= var
->num_hw_breakpoints
)
973 if (var
->num_hw_watchpoints
== 0)
977 else if (cnt
<= var
->num_hw_watchpoints
)
985 frv_stopped_data_address (void)
987 CORE_ADDR brr
, dbar0
, dbar1
, dbar2
, dbar3
;
989 brr
= read_register (brr_regnum
);
990 dbar0
= read_register (dbar0_regnum
);
991 dbar1
= read_register (dbar1_regnum
);
992 dbar2
= read_register (dbar2_regnum
);
993 dbar3
= read_register (dbar3_regnum
);
997 else if (brr
& (1<<10))
999 else if (brr
& (1<<9))
1001 else if (brr
& (1<<8))
1007 static struct gdbarch
*
1008 frv_gdbarch_init (struct gdbarch_info info
, struct gdbarch_list
*arches
)
1010 struct gdbarch
*gdbarch
;
1011 struct gdbarch_tdep
*var
;
1013 /* Check to see if we've already built an appropriate architecture
1014 object for this executable. */
1015 arches
= gdbarch_list_lookup_by_info (arches
, &info
);
1017 return arches
->gdbarch
;
1019 /* Select the right tdep structure for this variant. */
1020 var
= new_variant ();
1021 switch (info
.bfd_arch_info
->mach
)
1024 case bfd_mach_frvsimple
:
1025 case bfd_mach_fr500
:
1026 case bfd_mach_frvtomcat
:
1027 set_variant_num_gprs (var
, 64);
1028 set_variant_num_fprs (var
, 64);
1031 case bfd_mach_fr400
:
1032 set_variant_num_gprs (var
, 32);
1033 set_variant_num_fprs (var
, 32);
1037 /* Never heard of this variant. */
1041 gdbarch
= gdbarch_alloc (&info
, var
);
1043 /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
1044 ready to unwind the PC first (see frame.c:get_prev_frame()). */
1045 set_gdbarch_deprecated_init_frame_pc (gdbarch
, init_frame_pc_default
);
1047 set_gdbarch_short_bit (gdbarch
, 16);
1048 set_gdbarch_int_bit (gdbarch
, 32);
1049 set_gdbarch_long_bit (gdbarch
, 32);
1050 set_gdbarch_long_long_bit (gdbarch
, 64);
1051 set_gdbarch_float_bit (gdbarch
, 32);
1052 set_gdbarch_double_bit (gdbarch
, 64);
1053 set_gdbarch_long_double_bit (gdbarch
, 64);
1054 set_gdbarch_ptr_bit (gdbarch
, 32);
1056 set_gdbarch_num_regs (gdbarch
, frv_num_regs
);
1057 set_gdbarch_sp_regnum (gdbarch
, sp_regnum
);
1058 set_gdbarch_fp_regnum (gdbarch
, fp_regnum
);
1059 set_gdbarch_pc_regnum (gdbarch
, pc_regnum
);
1061 set_gdbarch_register_name (gdbarch
, frv_register_name
);
1062 set_gdbarch_register_size (gdbarch
, 4);
1063 set_gdbarch_register_bytes (gdbarch
, frv_num_regs
* 4);
1064 set_gdbarch_register_byte (gdbarch
, frv_register_byte
);
1065 set_gdbarch_register_raw_size (gdbarch
, frv_register_raw_size
);
1066 set_gdbarch_deprecated_max_register_raw_size (gdbarch
, 4);
1067 set_gdbarch_register_virtual_size (gdbarch
, frv_register_virtual_size
);
1068 set_gdbarch_deprecated_max_register_virtual_size (gdbarch
, 4);
1069 set_gdbarch_register_virtual_type (gdbarch
, frv_register_virtual_type
);
1071 set_gdbarch_skip_prologue (gdbarch
, frv_skip_prologue
);
1072 set_gdbarch_breakpoint_from_pc (gdbarch
, frv_breakpoint_from_pc
);
1074 set_gdbarch_frame_num_args (gdbarch
, frame_num_args_unknown
);
1075 set_gdbarch_frame_args_skip (gdbarch
, 0);
1076 set_gdbarch_frameless_function_invocation (gdbarch
, frv_frameless_function_invocation
);
1078 set_gdbarch_saved_pc_after_call (gdbarch
, frv_saved_pc_after_call
);
1080 set_gdbarch_deprecated_frame_chain (gdbarch
, frv_frame_chain
);
1081 set_gdbarch_deprecated_frame_saved_pc (gdbarch
, frv_frame_saved_pc
);
1083 set_gdbarch_deprecated_frame_init_saved_regs (gdbarch
, frv_frame_init_saved_regs
);
1085 set_gdbarch_use_struct_convention (gdbarch
, frv_use_struct_convention
);
1086 set_gdbarch_deprecated_extract_return_value (gdbarch
, frv_extract_return_value
);
1088 set_gdbarch_store_struct_return (gdbarch
, frv_store_struct_return
);
1089 set_gdbarch_deprecated_store_return_value (gdbarch
, frv_store_return_value
);
1090 set_gdbarch_deprecated_extract_struct_value_address (gdbarch
, frv_extract_struct_value_address
);
1092 /* Settings for calling functions in the inferior. */
1093 set_gdbarch_call_dummy_length (gdbarch
, 0);
1094 set_gdbarch_push_arguments (gdbarch
, frv_push_arguments
);
1095 set_gdbarch_push_return_address (gdbarch
, frv_push_return_address
);
1096 set_gdbarch_deprecated_pop_frame (gdbarch
, frv_pop_frame
);
1098 set_gdbarch_call_dummy_p (gdbarch
, 1);
1099 set_gdbarch_call_dummy_words (gdbarch
, frv_call_dummy_words
);
1100 set_gdbarch_sizeof_call_dummy_words (gdbarch
, sizeof (frv_call_dummy_words
));
1101 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch
, 1);
1102 set_gdbarch_deprecated_init_extra_frame_info (gdbarch
, frv_init_extra_frame_info
);
1104 /* Settings that should be unnecessary. */
1105 set_gdbarch_inner_than (gdbarch
, core_addr_lessthan
);
1107 set_gdbarch_read_pc (gdbarch
, generic_target_read_pc
);
1108 set_gdbarch_write_pc (gdbarch
, generic_target_write_pc
);
1109 set_gdbarch_read_fp (gdbarch
, generic_target_read_fp
);
1110 set_gdbarch_read_sp (gdbarch
, generic_target_read_sp
);
1111 set_gdbarch_write_sp (gdbarch
, generic_target_write_sp
);
1113 set_gdbarch_call_dummy_address (gdbarch
, entry_point_address
);
1114 set_gdbarch_call_dummy_breakpoint_offset (gdbarch
, 0);
1115 set_gdbarch_call_dummy_start_offset (gdbarch
, 0);
1116 set_gdbarch_deprecated_pc_in_call_dummy (gdbarch
, deprecated_pc_in_call_dummy_at_entry_point
);
1117 set_gdbarch_fix_call_dummy (gdbarch
, generic_fix_call_dummy
);
1119 set_gdbarch_decr_pc_after_break (gdbarch
, 0);
1120 set_gdbarch_function_start_offset (gdbarch
, 0);
1121 set_gdbarch_register_convertible (gdbarch
, generic_register_convertible_not
);
1123 set_gdbarch_remote_translate_xfer_address
1124 (gdbarch
, frv_remote_translate_xfer_address
);
1126 /* Hardware watchpoint / breakpoint support. */
1127 switch (info
.bfd_arch_info
->mach
)
1130 case bfd_mach_frvsimple
:
1131 case bfd_mach_fr500
:
1132 case bfd_mach_frvtomcat
:
1133 /* fr500-style hardware debugging support. */
1134 var
->num_hw_watchpoints
= 4;
1135 var
->num_hw_breakpoints
= 4;
1138 case bfd_mach_fr400
:
1139 /* fr400-style hardware debugging support. */
1140 var
->num_hw_watchpoints
= 2;
1141 var
->num_hw_breakpoints
= 4;
1145 /* Otherwise, assume we don't have hardware debugging support. */
1146 var
->num_hw_watchpoints
= 0;
1147 var
->num_hw_breakpoints
= 0;
1155 _initialize_frv_tdep (void)
1157 register_gdbarch_init (bfd_arch_frv
, frv_gdbarch_init
);
1159 tm_print_insn
= print_insn_frv
;