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_skip_prologue_ftype frv_skip_prologue;
40 static gdbarch_deprecated_extract_return_value_ftype frv_extract_return_value;
41 static gdbarch_deprecated_extract_struct_value_address_ftype frv_extract_struct_value_address;
42 static gdbarch_use_struct_convention_ftype frv_use_struct_convention;
43 static gdbarch_frameless_function_invocation_ftype frv_frameless_function_invocation;
44 static gdbarch_init_extra_frame_info_ftype stupid_useless_init_extra_frame_info;
45 static gdbarch_store_struct_return_ftype frv_store_struct_return;
46 static gdbarch_push_arguments_ftype frv_push_arguments;
47 static gdbarch_push_return_address_ftype frv_push_return_address;
48 static gdbarch_saved_pc_after_call_ftype frv_saved_pc_after_call;
50 static void frv_pop_frame_regular (struct frame_info *frame);
52 /* Register numbers. You can change these as needed, but don't forget
53 to update the simulator accordingly. */
55 /* The total number of registers we know exist. */
58 /* Register numbers 0 -- 63 are always reserved for general-purpose
59 registers. The chip at hand may have less. */
63 struct_return_regnum = 3,
66 /* Register numbers 64 -- 127 are always reserved for floating-point
67 registers. The chip at hand may have less. */
68 first_fpr_regnum = 64,
69 last_fpr_regnum = 127,
71 /* Register numbers 128 on up are always reserved for special-purpose
73 first_spr_regnum = 128,
89 static LONGEST frv_call_dummy_words[] =
93 /* The contents of this structure can only be trusted after we've
94 frv_frame_init_saved_regs on the frame. */
95 struct frame_extra_info
97 /* The offset from our frame pointer to our caller's stack
99 int fp_to_callers_sp_offset;
101 /* Non-zero if we've saved our return address on the stack yet.
102 Zero if it's still sitting in the link register. */
103 int lr_saved_on_stack;
107 /* A structure describing a particular variant of the FRV.
108 We allocate and initialize one of these structures when we create
109 the gdbarch object for a variant.
111 At the moment, all the FR variants we support differ only in which
112 registers are present; the portable code of GDB knows that
113 registers whose names are the empty string don't exist, so the
114 `register_names' array captures all the per-variant information we
117 in the future, if we need to have per-variant maps for raw size,
118 virtual type, etc., we should replace register_names with an array
119 of structures, each of which gives all the necessary info for one
120 register. Don't stick parallel arrays in here --- that's so
124 /* How many general-purpose registers does this variant have? */
127 /* How many floating-point registers does this variant have? */
130 /* How many hardware watchpoints can it support? */
131 int num_hw_watchpoints;
133 /* How many hardware breakpoints can it support? */
134 int num_hw_breakpoints;
136 /* Register names. */
137 char **register_names;
140 #define CURRENT_VARIANT (gdbarch_tdep (current_gdbarch))
143 /* Allocate a new variant structure, and set up default values for all
145 static struct gdbarch_tdep *
148 struct gdbarch_tdep *var;
152 var = xmalloc (sizeof (*var));
153 memset (var, 0, sizeof (*var));
157 var->num_hw_watchpoints = 0;
158 var->num_hw_breakpoints = 0;
160 /* By default, don't supply any general-purpose or floating-point
162 var->register_names = (char **) xmalloc (frv_num_regs * sizeof (char *));
163 for (r = 0; r < frv_num_regs; r++)
164 var->register_names[r] = "";
166 /* Do, however, supply default names for the special-purpose
168 for (r = first_spr_regnum; r <= last_spr_regnum; ++r)
170 sprintf (buf, "x%d", r);
171 var->register_names[r] = xstrdup (buf);
174 var->register_names[pc_regnum] = "pc";
175 var->register_names[lr_regnum] = "lr";
176 var->register_names[lcr_regnum] = "lcr";
178 var->register_names[psr_regnum] = "psr";
179 var->register_names[ccr_regnum] = "ccr";
180 var->register_names[cccr_regnum] = "cccr";
181 var->register_names[tbr_regnum] = "tbr";
183 /* Debug registers. */
184 var->register_names[brr_regnum] = "brr";
185 var->register_names[dbar0_regnum] = "dbar0";
186 var->register_names[dbar1_regnum] = "dbar1";
187 var->register_names[dbar2_regnum] = "dbar2";
188 var->register_names[dbar3_regnum] = "dbar3";
194 /* Indicate that the variant VAR has NUM_GPRS general-purpose
195 registers, and fill in the names array appropriately. */
197 set_variant_num_gprs (struct gdbarch_tdep *var, int num_gprs)
201 var->num_gprs = num_gprs;
203 for (r = 0; r < num_gprs; ++r)
207 sprintf (buf, "gr%d", r);
208 var->register_names[first_gpr_regnum + r] = xstrdup (buf);
213 /* Indicate that the variant VAR has NUM_FPRS floating-point
214 registers, and fill in the names array appropriately. */
216 set_variant_num_fprs (struct gdbarch_tdep *var, int num_fprs)
220 var->num_fprs = num_fprs;
222 for (r = 0; r < num_fprs; ++r)
226 sprintf (buf, "fr%d", r);
227 var->register_names[first_fpr_regnum + r] = xstrdup (buf);
233 frv_register_name (int reg)
237 if (reg >= frv_num_regs)
240 return CURRENT_VARIANT->register_names[reg];
245 frv_register_raw_size (int reg)
251 frv_register_virtual_size (int reg)
257 frv_register_virtual_type (int reg)
259 if (reg >= 64 && reg <= 127)
260 return builtin_type_float;
262 return builtin_type_int;
266 frv_register_byte (int reg)
271 static const unsigned char *
272 frv_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenp)
274 static unsigned char breakpoint[] = {0xc0, 0x70, 0x00, 0x01};
275 *lenp = sizeof (breakpoint);
280 frv_frame_chain (struct frame_info *frame)
282 CORE_ADDR saved_fp_addr;
284 if (frame->saved_regs && frame->saved_regs[fp_regnum] != 0)
285 saved_fp_addr = frame->saved_regs[fp_regnum];
287 /* Just assume it was saved in the usual place. */
288 saved_fp_addr = frame->frame;
290 return read_memory_integer (saved_fp_addr, 4);
294 frv_frame_saved_pc (struct frame_info *frame)
296 frv_frame_init_saved_regs (frame);
298 /* Perhaps the prologue analyzer recorded where it was stored.
299 (As of 14 Oct 2001, it never does.) */
300 if (frame->saved_regs && frame->saved_regs[pc_regnum] != 0)
301 return read_memory_integer (frame->saved_regs[pc_regnum], 4);
303 /* If the prologue analyzer tells us the link register was saved on
304 the stack, get it from there. */
305 if (frame->extra_info->lr_saved_on_stack)
306 return read_memory_integer (frame->frame + 8, 4);
308 /* Otherwise, it's still in LR.
309 However, if FRAME isn't the youngest frame, this is kind of
310 suspicious --- if this frame called somebody else, then its LR
311 has certainly been overwritten. */
313 return read_register (lr_regnum);
315 /* By default, assume it's saved in the standard place, relative to
316 the frame pointer. */
317 return read_memory_integer (frame->frame + 8, 4);
321 /* Return true if REG is a caller-saves ("scratch") register,
324 is_caller_saves_reg (int reg)
326 return ((4 <= reg && reg <= 7)
327 || (14 <= reg && reg <= 15)
328 || (32 <= reg && reg <= 47));
332 /* Return true if REG is a callee-saves register, false otherwise. */
334 is_callee_saves_reg (int reg)
336 return ((16 <= reg && reg <= 31)
337 || (48 <= reg && reg <= 63));
341 /* Return true if REG is an argument register, false otherwise. */
343 is_argument_reg (int reg)
345 return (8 <= reg && reg <= 13);
349 /* Scan an FR-V prologue, starting at PC, until frame->PC.
350 If FRAME is non-zero, fill in its saved_regs with appropriate addresses.
351 We assume FRAME's saved_regs array has already been allocated and cleared.
352 Return the first PC value after the prologue.
354 Note that, for unoptimized code, we almost don't need this function
355 at all; all arguments and locals live on the stack, so we just need
356 the FP to find everything. The catch: structures passed by value
357 have their addresses living in registers; they're never spilled to
358 the stack. So if you ever want to be able to get to these
359 arguments in any frame but the top, you'll need to do this serious
360 prologue analysis. */
362 frv_analyze_prologue (CORE_ADDR pc, struct frame_info *frame)
364 /* When writing out instruction bitpatterns, we use the following
365 letters to label instruction fields:
366 P - The parallel bit. We don't use this.
367 J - The register number of GRj in the instruction description.
368 K - The register number of GRk in the instruction description.
369 I - The register number of GRi.
370 S - a signed imediate offset.
371 U - an unsigned immediate offset.
373 The dots below the numbers indicate where hex digit boundaries
374 fall, to make it easier to check the numbers. */
376 /* Non-zero iff we've seen the instruction that initializes the
377 frame pointer for this function's frame. */
380 /* If fp_set is non_zero, then this is the distance from
381 the stack pointer to frame pointer: fp = sp + fp_offset. */
384 /* Total size of frame prior to any alloca operations. */
387 /* The number of the general-purpose register we saved the return
388 address ("link register") in, or -1 if we haven't moved it yet. */
389 int lr_save_reg = -1;
391 /* Non-zero iff we've saved the LR onto the stack. */
392 int lr_saved_on_stack = 0;
394 /* If gr_saved[i] is non-zero, then we've noticed that general
395 register i has been saved at gr_sp_offset[i] from the stack
398 int gr_sp_offset[64];
400 memset (gr_saved, 0, sizeof (gr_saved));
402 while (! frame || pc < frame->pc)
404 LONGEST op = read_memory_integer (pc, 4);
406 /* The tests in this chain of ifs should be in order of
407 decreasing selectivity, so that more particular patterns get
408 to fire before less particular patterns. */
410 /* Setting the FP from the SP:
412 P 000010 0100010 000001 000000000000 = 0x04881000
413 0 111111 1111111 111111 111111111111 = 0x7fffffff
415 We treat this as part of the prologue. */
416 if ((op & 0x7fffffff) == 0x04881000)
422 /* Move the link register to the scratch register grJ, before saving:
424 P 000100 0000011 010000 000111 JJJJJJ = 0x080d01c0
425 0 111111 1111111 111111 111111 000000 = 0x7fffffc0
427 We treat this as part of the prologue. */
428 else if ((op & 0x7fffffc0) == 0x080d01c0)
430 int gr_j = op & 0x3f;
432 /* If we're moving it to a scratch register, that's fine. */
433 if (is_caller_saves_reg (gr_j))
435 /* Otherwise it's not a prologue instruction that we
441 /* To save multiple callee-saves registers on the stack, at
445 P KKKKKK 0000011 000001 000011 000000 = 0x000c10c0
446 0 000000 1111111 111111 111111 111111 = 0x01ffffff
449 P KKKKKK 0000011 000001 000100 000000 = 0x000c1100
450 0 000000 1111111 111111 111111 111111 = 0x01ffffff
452 We treat this as part of the prologue, and record the register's
453 saved address in the frame structure. */
454 else if ((op & 0x01ffffff) == 0x000c10c0
455 || (op & 0x01ffffff) == 0x000c1100)
457 int gr_k = ((op >> 25) & 0x3f);
458 int ope = ((op >> 6) & 0x3f);
462 /* Is it an std or an stq? */
468 /* Is it really a callee-saves register? */
469 if (is_callee_saves_reg (gr_k))
471 for (i = 0; i < count; i++)
473 gr_saved[gr_k + i] = 1;
474 gr_sp_offset[gr_k + i] = 4 * i;
478 /* It's not a prologue instruction. */
482 /* Adjusting the stack pointer. (The stack pointer is GR1.)
484 P 000001 0010000 000001 SSSSSSSSSSSS = 0x02401000
485 0 111111 1111111 111111 000000000000 = 0x7ffff000
487 We treat this as part of the prologue. */
488 else if ((op & 0x7ffff000) == 0x02401000)
490 /* Sign-extend the twelve-bit field.
491 (Isn't there a better way to do this?) */
492 int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
497 /* Setting the FP to a constant distance from the SP:
499 P 000010 0010000 000001 SSSSSSSSSSSS = 0x04401000
500 0 111111 1111111 111111 000000000000 = 0x7ffff000
502 We treat this as part of the prologue. */
503 else if ((op & 0x7ffff000) == 0x04401000)
505 /* Sign-extend the twelve-bit field.
506 (Isn't there a better way to do this?) */
507 int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
512 /* To spill an argument register to a scratch register:
514 P KKKKKK 0100010 IIIIII 000000000000 = 0x00880000
515 0 000000 1111111 000000 111111111111 = 0x01fc0fff
517 For the time being, we treat this as a prologue instruction,
518 assuming that GRi is an argument register. This one's kind
519 of suspicious, because it seems like it could be part of a
520 legitimate body instruction. But we only come here when the
521 source info wasn't helpful, so we have to do the best we can.
522 Hopefully once GCC and GDB agree on how to emit line number
523 info for prologues, then this code will never come into play. */
524 else if ((op & 0x01fc0fff) == 0x00880000)
526 int gr_i = ((op >> 12) & 0x3f);
528 /* If the source isn't an arg register, then this isn't a
529 prologue instruction. */
530 if (! is_argument_reg (gr_i))
534 /* To spill 16-bit values to the stack:
536 P KKKKKK 1010001 000010 SSSSSSSSSSSS = 0x01442000
537 0 000000 1111111 111111 000000000000 = 0x01fff000
539 And for 8-bit values, we use STB instructions.
541 P KKKKKK 1010000 000010 SSSSSSSSSSSS = 0x01402000
542 0 000000 1111111 111111 000000000000 = 0x01fff000
544 We check that GRk is really an argument register, and treat
545 all such as part of the prologue. */
546 else if ( (op & 0x01fff000) == 0x01442000
547 || (op & 0x01fff000) == 0x01402000)
549 int gr_k = ((op >> 25) & 0x3f);
551 if (! is_argument_reg (gr_k))
552 break; /* Source isn't an arg register. */
555 /* To save multiple callee-saves register on the stack, at a
559 P KKKKKK 1010011 000001 SSSSSSSSSSSS = 0x014c1000
560 0 000000 1111111 111111 000000000000 = 0x01fff000
563 P KKKKKK 1010100 000001 SSSSSSSSSSSS = 0x01501000
564 0 000000 1111111 111111 000000000000 = 0x01fff000
566 We treat this as part of the prologue, and record the register's
567 saved address in the frame structure. */
568 else if ((op & 0x01fff000) == 0x014c1000
569 || (op & 0x01fff000) == 0x01501000)
571 int gr_k = ((op >> 25) & 0x3f);
575 /* Is it a stdi or a stqi? */
576 if ((op & 0x01fff000) == 0x014c1000)
581 /* Is it really a callee-saves register? */
582 if (is_callee_saves_reg (gr_k))
584 /* Sign-extend the twelve-bit field.
585 (Isn't there a better way to do this?) */
586 int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
588 for (i = 0; i < count; i++)
590 gr_saved[gr_k + i] = 1;
591 gr_sp_offset[gr_k + i] = s + (4 * i);
595 /* It's not a prologue instruction. */
599 /* Storing any kind of integer register at any constant offset
600 from any other register.
603 P KKKKKK 0000011 IIIIII 000010 000000 = 0x000c0080
604 0 000000 1111111 000000 111111 111111 = 0x01fc0fff
607 P KKKKKK 1010010 IIIIII SSSSSSSSSSSS = 0x01480000
608 0 000000 1111111 000000 000000000000 = 0x01fc0000
610 These could be almost anything, but a lot of prologue
611 instructions fall into this pattern, so let's decode the
612 instruction once, and then work at a higher level. */
613 else if (((op & 0x01fc0fff) == 0x000c0080)
614 || ((op & 0x01fc0000) == 0x01480000))
616 int gr_k = ((op >> 25) & 0x3f);
617 int gr_i = ((op >> 12) & 0x3f);
620 /* Are we storing with gr0 as an offset, or using an
622 if ((op & 0x01fc0fff) == 0x000c0080)
625 offset = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
627 /* If the address isn't relative to the SP or FP, it's not a
628 prologue instruction. */
629 if (gr_i != sp_regnum && gr_i != fp_regnum)
632 /* Saving the old FP in the new frame (relative to the SP). */
633 if (gr_k == fp_regnum && gr_i == sp_regnum)
636 /* Saving callee-saves register(s) on the stack, relative to
638 else if (gr_i == sp_regnum
639 && is_callee_saves_reg (gr_k))
642 gr_sp_offset[gr_k] = offset;
645 /* Saving the scratch register holding the return address. */
646 else if (lr_save_reg != -1
647 && gr_k == lr_save_reg)
648 lr_saved_on_stack = 1;
650 /* Spilling int-sized arguments to the stack. */
651 else if (is_argument_reg (gr_k))
654 /* It's not a store instruction we recognize, so this must
655 be the end of the prologue. */
660 /* It's not any instruction we recognize, so this must be the end
670 frame->extra_info->lr_saved_on_stack = lr_saved_on_stack;
672 /* If we know the relationship between the stack and frame
673 pointers, record the addresses of the registers we noticed.
674 Note that we have to do this as a separate step at the end,
675 because instructions may save relative to the SP, but we need
676 their addresses relative to the FP. */
681 for (i = 0; i < 64; i++)
683 frame->saved_regs[i] = (frame->frame
684 - fp_offset + gr_sp_offset[i]);
686 frame->extra_info->fp_to_callers_sp_offset = framesize - fp_offset;
695 frv_skip_prologue (CORE_ADDR pc)
697 CORE_ADDR func_addr, func_end, new_pc;
701 /* If the line table has entry for a line *within* the function
702 (i.e., not in the prologue, and not past the end), then that's
704 if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
706 struct symtab_and_line sal;
708 sal = find_pc_line (func_addr, 0);
710 if (sal.line != 0 && sal.end < func_end)
716 /* The FR-V prologue is at least five instructions long (twenty bytes).
717 If we didn't find a real source location past that, then
718 do a full analysis of the prologue. */
719 if (new_pc < pc + 20)
720 new_pc = frv_analyze_prologue (pc, 0);
726 frv_frame_init_saved_regs (struct frame_info *frame)
728 if (frame->saved_regs)
731 frame_saved_regs_zalloc (frame);
732 frame->saved_regs[fp_regnum] = frame->frame;
734 /* Find the beginning of this function, so we can analyze its
737 CORE_ADDR func_addr, func_end;
739 if (find_pc_partial_function (frame->pc, NULL, &func_addr, &func_end))
740 frv_analyze_prologue (func_addr, frame);
744 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
745 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
746 and TYPE is the type (which is known to be struct, union or array).
748 The frv returns all structs in memory. */
751 frv_use_struct_convention (int gcc_p, struct type *type)
757 frv_extract_return_value (struct type *type, char *regbuf, char *valbuf)
759 memcpy (valbuf, (regbuf
760 + frv_register_byte (8)
761 + (TYPE_LENGTH (type) < 4 ? 4 - TYPE_LENGTH (type) : 0)),
766 frv_extract_struct_value_address (char *regbuf)
768 return extract_address (regbuf + frv_register_byte (struct_return_regnum),
773 frv_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
775 write_register (struct_return_regnum, addr);
779 frv_frameless_function_invocation (struct frame_info *frame)
781 return frameless_look_for_prologue (frame);
785 frv_saved_pc_after_call (struct frame_info *frame)
787 return read_register (lr_regnum);
791 frv_init_extra_frame_info (int fromleaf, struct frame_info *frame)
793 frame_extra_info_zalloc (frame, sizeof (struct frame_extra_info));
794 frame->extra_info->fp_to_callers_sp_offset = 0;
795 frame->extra_info->lr_saved_on_stack = 0;
798 #define ROUND_UP(n,a) (((n)+(a)-1) & ~((a)-1))
799 #define ROUND_DOWN(n,a) ((n) & ~((a)-1))
802 frv_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
803 int struct_return, CORE_ADDR struct_addr)
810 struct type *arg_type;
812 enum type_code typecode;
818 printf("Push %d args at sp = %x, struct_return=%d (%x)\n",
819 nargs, (int) sp, struct_return, struct_addr);
823 for (argnum = 0; argnum < nargs; ++argnum)
824 stack_space += ROUND_UP (TYPE_LENGTH (VALUE_TYPE (args[argnum])), 4);
826 stack_space -= (6 * 4);
830 /* Make sure stack is dword aligned. */
831 sp = ROUND_DOWN (sp, 8);
838 write_register (struct_return_regnum, struct_addr);
840 for (argnum = 0; argnum < nargs; ++argnum)
843 arg_type = check_typedef (VALUE_TYPE (arg));
844 len = TYPE_LENGTH (arg_type);
845 typecode = TYPE_CODE (arg_type);
847 if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)
849 store_address (valbuf, 4, VALUE_ADDRESS (arg));
850 typecode = TYPE_CODE_PTR;
856 val = (char *) VALUE_CONTENTS (arg);
861 int partial_len = (len < 4 ? len : 4);
865 regval = extract_address (val, partial_len);
867 printf(" Argnum %d data %x -> reg %d\n",
868 argnum, (int) regval, argreg);
870 write_register (argreg, regval);
876 printf(" Argnum %d data %x -> offset %d (%x)\n",
877 argnum, *((int *)val), stack_offset, (int) (sp + stack_offset));
879 write_memory (sp + stack_offset, val, partial_len);
880 stack_offset += ROUND_UP(partial_len, 4);
890 frv_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
892 write_register (lr_regnum, CALL_DUMMY_ADDRESS ());
897 frv_store_return_value (struct type *type, char *valbuf)
899 int length = TYPE_LENGTH (type);
900 int reg8_offset = frv_register_byte (8);
903 deprecated_write_register_bytes (reg8_offset + (4 - length), valbuf,
905 else if (length == 8)
906 deprecated_write_register_bytes (reg8_offset, valbuf, length);
908 internal_error (__FILE__, __LINE__,
909 "Don't know how to return a %d-byte value.", length);
915 generic_pop_current_frame (frv_pop_frame_regular);
919 frv_pop_frame_regular (struct frame_info *frame)
926 frv_frame_init_saved_regs (frame);
928 write_register (pc_regnum, frv_frame_saved_pc (frame));
929 for (regno = 0; regno < frv_num_regs; ++regno)
931 if (frame->saved_regs[regno]
932 && regno != pc_regnum
933 && regno != sp_regnum)
935 write_register (regno,
936 read_memory_integer (frame->saved_regs[regno], 4));
939 write_register (sp_regnum, fp + frame->extra_info->fp_to_callers_sp_offset);
940 flush_cached_frames ();
945 frv_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes,
946 CORE_ADDR *targ_addr, int *targ_len)
948 *targ_addr = memaddr;
949 *targ_len = nr_bytes;
953 /* Hardware watchpoint / breakpoint support for the FR500
957 frv_check_watch_resources (int type, int cnt, int ot)
959 struct gdbarch_tdep *var = CURRENT_VARIANT;
961 /* Watchpoints not supported on simulator. */
962 if (strcmp (target_shortname, "sim") == 0)
965 if (type == bp_hardware_breakpoint)
967 if (var->num_hw_breakpoints == 0)
969 else if (cnt <= var->num_hw_breakpoints)
974 if (var->num_hw_watchpoints == 0)
978 else if (cnt <= var->num_hw_watchpoints)
986 frv_stopped_data_address (void)
988 CORE_ADDR brr, dbar0, dbar1, dbar2, dbar3;
990 brr = read_register (brr_regnum);
991 dbar0 = read_register (dbar0_regnum);
992 dbar1 = read_register (dbar1_regnum);
993 dbar2 = read_register (dbar2_regnum);
994 dbar3 = read_register (dbar3_regnum);
998 else if (brr & (1<<10))
1000 else if (brr & (1<<9))
1002 else if (brr & (1<<8))
1008 static struct gdbarch *
1009 frv_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1011 struct gdbarch *gdbarch;
1012 struct gdbarch_tdep *var;
1014 /* Check to see if we've already built an appropriate architecture
1015 object for this executable. */
1016 arches = gdbarch_list_lookup_by_info (arches, &info);
1018 return arches->gdbarch;
1020 /* Select the right tdep structure for this variant. */
1021 var = new_variant ();
1022 switch (info.bfd_arch_info->mach)
1025 case bfd_mach_frvsimple:
1026 case bfd_mach_fr500:
1027 case bfd_mach_frvtomcat:
1028 set_variant_num_gprs (var, 64);
1029 set_variant_num_fprs (var, 64);
1032 case bfd_mach_fr400:
1033 set_variant_num_gprs (var, 32);
1034 set_variant_num_fprs (var, 32);
1038 /* Never heard of this variant. */
1042 gdbarch = gdbarch_alloc (&info, var);
1044 /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
1045 ready to unwind the PC first (see frame.c:get_prev_frame()). */
1046 set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
1048 set_gdbarch_short_bit (gdbarch, 16);
1049 set_gdbarch_int_bit (gdbarch, 32);
1050 set_gdbarch_long_bit (gdbarch, 32);
1051 set_gdbarch_long_long_bit (gdbarch, 64);
1052 set_gdbarch_float_bit (gdbarch, 32);
1053 set_gdbarch_double_bit (gdbarch, 64);
1054 set_gdbarch_long_double_bit (gdbarch, 64);
1055 set_gdbarch_ptr_bit (gdbarch, 32);
1057 set_gdbarch_num_regs (gdbarch, frv_num_regs);
1058 set_gdbarch_sp_regnum (gdbarch, sp_regnum);
1059 set_gdbarch_fp_regnum (gdbarch, fp_regnum);
1060 set_gdbarch_pc_regnum (gdbarch, pc_regnum);
1062 set_gdbarch_register_name (gdbarch, frv_register_name);
1063 set_gdbarch_register_size (gdbarch, 4);
1064 set_gdbarch_register_bytes (gdbarch, frv_num_regs * 4);
1065 set_gdbarch_register_byte (gdbarch, frv_register_byte);
1066 set_gdbarch_register_raw_size (gdbarch, frv_register_raw_size);
1067 set_gdbarch_deprecated_max_register_raw_size (gdbarch, 4);
1068 set_gdbarch_register_virtual_size (gdbarch, frv_register_virtual_size);
1069 set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 4);
1070 set_gdbarch_register_virtual_type (gdbarch, frv_register_virtual_type);
1072 set_gdbarch_skip_prologue (gdbarch, frv_skip_prologue);
1073 set_gdbarch_breakpoint_from_pc (gdbarch, frv_breakpoint_from_pc);
1075 set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
1076 set_gdbarch_frame_args_skip (gdbarch, 0);
1077 set_gdbarch_frameless_function_invocation (gdbarch, frv_frameless_function_invocation);
1079 set_gdbarch_saved_pc_after_call (gdbarch, frv_saved_pc_after_call);
1081 set_gdbarch_frame_chain (gdbarch, frv_frame_chain);
1082 set_gdbarch_deprecated_frame_saved_pc (gdbarch, frv_frame_saved_pc);
1084 set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, frv_frame_init_saved_regs);
1086 set_gdbarch_use_struct_convention (gdbarch, frv_use_struct_convention);
1087 set_gdbarch_deprecated_extract_return_value (gdbarch, frv_extract_return_value);
1089 set_gdbarch_store_struct_return (gdbarch, frv_store_struct_return);
1090 set_gdbarch_deprecated_store_return_value (gdbarch, frv_store_return_value);
1091 set_gdbarch_deprecated_extract_struct_value_address (gdbarch, frv_extract_struct_value_address);
1093 /* Settings for calling functions in the inferior. */
1094 set_gdbarch_call_dummy_length (gdbarch, 0);
1095 set_gdbarch_push_arguments (gdbarch, frv_push_arguments);
1096 set_gdbarch_push_return_address (gdbarch, frv_push_return_address);
1097 set_gdbarch_deprecated_pop_frame (gdbarch, frv_pop_frame);
1099 set_gdbarch_call_dummy_p (gdbarch, 1);
1100 set_gdbarch_call_dummy_words (gdbarch, frv_call_dummy_words);
1101 set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (frv_call_dummy_words));
1102 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
1103 set_gdbarch_deprecated_init_extra_frame_info (gdbarch, frv_init_extra_frame_info);
1105 /* Settings that should be unnecessary. */
1106 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1108 set_gdbarch_read_pc (gdbarch, generic_target_read_pc);
1109 set_gdbarch_write_pc (gdbarch, generic_target_write_pc);
1110 set_gdbarch_read_fp (gdbarch, generic_target_read_fp);
1111 set_gdbarch_read_sp (gdbarch, generic_target_read_sp);
1112 set_gdbarch_write_sp (gdbarch, generic_target_write_sp);
1114 set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
1115 set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
1116 set_gdbarch_call_dummy_start_offset (gdbarch, 0);
1117 set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point);
1118 set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
1119 set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
1121 set_gdbarch_decr_pc_after_break (gdbarch, 0);
1122 set_gdbarch_function_start_offset (gdbarch, 0);
1123 set_gdbarch_register_convertible (gdbarch, generic_register_convertible_not);
1125 set_gdbarch_remote_translate_xfer_address
1126 (gdbarch, frv_remote_translate_xfer_address);
1128 /* Hardware watchpoint / breakpoint support. */
1129 switch (info.bfd_arch_info->mach)
1132 case bfd_mach_frvsimple:
1133 case bfd_mach_fr500:
1134 case bfd_mach_frvtomcat:
1135 /* fr500-style hardware debugging support. */
1136 var->num_hw_watchpoints = 4;
1137 var->num_hw_breakpoints = 4;
1140 case bfd_mach_fr400:
1141 /* fr400-style hardware debugging support. */
1142 var->num_hw_watchpoints = 2;
1143 var->num_hw_breakpoints = 4;
1147 /* Otherwise, assume we don't have hardware debugging support. */
1148 var->num_hw_watchpoints = 0;
1149 var->num_hw_breakpoints = 0;
1157 _initialize_frv_tdep (void)
1159 register_gdbarch_init (bfd_arch_frv, frv_gdbarch_init);
1161 tm_print_insn = print_insn_frv;