1 /* Target-dependent code for the Fujitsu FR-V, for GDB, the GNU Debugger.
2 Copyright 2002 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
23 #include "symfile.h" /* for entry_point_address */
25 #include "arch-utils.h"
28 extern void _initialize_frv_tdep (void);
30 static gdbarch_init_ftype frv_gdbarch_init;
32 static gdbarch_register_name_ftype frv_register_name;
33 static gdbarch_register_raw_size_ftype frv_register_raw_size;
34 static gdbarch_register_virtual_size_ftype frv_register_virtual_size;
35 static gdbarch_register_virtual_type_ftype frv_register_virtual_type;
36 static gdbarch_register_byte_ftype frv_register_byte;
37 static gdbarch_breakpoint_from_pc_ftype frv_breakpoint_from_pc;
38 static gdbarch_frame_chain_ftype frv_frame_chain;
39 static gdbarch_frame_saved_pc_ftype frv_frame_saved_pc;
40 static gdbarch_skip_prologue_ftype frv_skip_prologue;
41 static gdbarch_frame_init_saved_regs_ftype frv_frame_init_saved_regs;
42 static gdbarch_deprecated_extract_return_value_ftype frv_extract_return_value;
43 static gdbarch_deprecated_extract_struct_value_address_ftype frv_extract_struct_value_address;
44 static gdbarch_use_struct_convention_ftype frv_use_struct_convention;
45 static gdbarch_frameless_function_invocation_ftype frv_frameless_function_invocation;
46 static gdbarch_init_extra_frame_info_ftype stupid_useless_init_extra_frame_info;
47 static gdbarch_store_return_value_ftype frv_store_return_value;
48 static gdbarch_store_struct_return_ftype frv_store_struct_return;
49 static gdbarch_push_arguments_ftype frv_push_arguments;
50 static gdbarch_push_return_address_ftype frv_push_return_address;
51 static gdbarch_pop_frame_ftype frv_pop_frame;
52 static gdbarch_saved_pc_after_call_ftype frv_saved_pc_after_call;
54 static void frv_pop_frame_regular (struct frame_info *frame);
56 /* Register numbers. You can change these as needed, but don't forget
57 to update the simulator accordingly. */
59 /* The total number of registers we know exist. */
62 /* Register numbers 0 -- 63 are always reserved for general-purpose
63 registers. The chip at hand may have less. */
67 struct_return_regnum = 3,
70 /* Register numbers 64 -- 127 are always reserved for floating-point
71 registers. The chip at hand may have less. */
72 first_fpr_regnum = 64,
73 last_fpr_regnum = 127,
75 /* Register numbers 128 on up are always reserved for special-purpose
77 first_spr_regnum = 128,
93 static LONGEST frv_call_dummy_words[] =
97 /* The contents of this structure can only be trusted after we've
98 frv_frame_init_saved_regs on the frame. */
99 struct frame_extra_info
101 /* The offset from our frame pointer to our caller's stack
103 int fp_to_callers_sp_offset;
105 /* Non-zero if we've saved our return address on the stack yet.
106 Zero if it's still sitting in the link register. */
107 int lr_saved_on_stack;
111 /* A structure describing a particular variant of the FRV.
112 We allocate and initialize one of these structures when we create
113 the gdbarch object for a variant.
115 At the moment, all the FR variants we support differ only in which
116 registers are present; the portable code of GDB knows that
117 registers whose names are the empty string don't exist, so the
118 `register_names' array captures all the per-variant information we
121 in the future, if we need to have per-variant maps for raw size,
122 virtual type, etc., we should replace register_names with an array
123 of structures, each of which gives all the necessary info for one
124 register. Don't stick parallel arrays in here --- that's so
128 /* How many general-purpose registers does this variant have? */
131 /* How many floating-point registers does this variant have? */
134 /* How many hardware watchpoints can it support? */
135 int num_hw_watchpoints;
137 /* How many hardware breakpoints can it support? */
138 int num_hw_breakpoints;
140 /* Register names. */
141 char **register_names;
144 #define CURRENT_VARIANT (gdbarch_tdep (current_gdbarch))
147 /* Allocate a new variant structure, and set up default values for all
149 static struct gdbarch_tdep *
152 struct gdbarch_tdep *var;
156 var = xmalloc (sizeof (*var));
157 memset (var, 0, sizeof (*var));
161 var->num_hw_watchpoints = 0;
162 var->num_hw_breakpoints = 0;
164 /* By default, don't supply any general-purpose or floating-point
166 var->register_names = (char **) xmalloc (frv_num_regs * sizeof (char *));
167 for (r = 0; r < frv_num_regs; r++)
168 var->register_names[r] = "";
170 /* Do, however, supply default names for the special-purpose
172 for (r = first_spr_regnum; r <= last_spr_regnum; ++r)
174 sprintf (buf, "x%d", r);
175 var->register_names[r] = xstrdup (buf);
178 var->register_names[pc_regnum] = "pc";
179 var->register_names[lr_regnum] = "lr";
180 var->register_names[lcr_regnum] = "lcr";
182 var->register_names[psr_regnum] = "psr";
183 var->register_names[ccr_regnum] = "ccr";
184 var->register_names[cccr_regnum] = "cccr";
185 var->register_names[tbr_regnum] = "tbr";
187 /* Debug registers. */
188 var->register_names[brr_regnum] = "brr";
189 var->register_names[dbar0_regnum] = "dbar0";
190 var->register_names[dbar1_regnum] = "dbar1";
191 var->register_names[dbar2_regnum] = "dbar2";
192 var->register_names[dbar3_regnum] = "dbar3";
198 /* Indicate that the variant VAR has NUM_GPRS general-purpose
199 registers, and fill in the names array appropriately. */
201 set_variant_num_gprs (struct gdbarch_tdep *var, int num_gprs)
205 var->num_gprs = num_gprs;
207 for (r = 0; r < num_gprs; ++r)
211 sprintf (buf, "gr%d", r);
212 var->register_names[first_gpr_regnum + r] = xstrdup (buf);
217 /* Indicate that the variant VAR has NUM_FPRS floating-point
218 registers, and fill in the names array appropriately. */
220 set_variant_num_fprs (struct gdbarch_tdep *var, int num_fprs)
224 var->num_fprs = num_fprs;
226 for (r = 0; r < num_fprs; ++r)
230 sprintf (buf, "fr%d", r);
231 var->register_names[first_fpr_regnum + r] = xstrdup (buf);
237 frv_register_name (int reg)
241 if (reg >= frv_num_regs)
244 return CURRENT_VARIANT->register_names[reg];
249 frv_register_raw_size (int reg)
255 frv_register_virtual_size (int reg)
261 frv_register_virtual_type (int reg)
263 if (reg >= 64 && reg <= 127)
264 return builtin_type_float;
266 return builtin_type_int;
270 frv_register_byte (int reg)
275 static const unsigned char *
276 frv_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenp)
278 static unsigned char breakpoint[] = {0xc0, 0x70, 0x00, 0x01};
279 *lenp = sizeof (breakpoint);
284 frv_frame_chain (struct frame_info *frame)
286 CORE_ADDR saved_fp_addr;
288 if (frame->saved_regs && frame->saved_regs[fp_regnum] != 0)
289 saved_fp_addr = frame->saved_regs[fp_regnum];
291 /* Just assume it was saved in the usual place. */
292 saved_fp_addr = frame->frame;
294 return read_memory_integer (saved_fp_addr, 4);
298 frv_frame_saved_pc (struct frame_info *frame)
300 frv_frame_init_saved_regs (frame);
302 /* Perhaps the prologue analyzer recorded where it was stored.
303 (As of 14 Oct 2001, it never does.) */
304 if (frame->saved_regs && frame->saved_regs[pc_regnum] != 0)
305 return read_memory_integer (frame->saved_regs[pc_regnum], 4);
307 /* If the prologue analyzer tells us the link register was saved on
308 the stack, get it from there. */
309 if (frame->extra_info->lr_saved_on_stack)
310 return read_memory_integer (frame->frame + 8, 4);
312 /* Otherwise, it's still in LR.
313 However, if FRAME isn't the youngest frame, this is kind of
314 suspicious --- if this frame called somebody else, then its LR
315 has certainly been overwritten. */
317 return read_register (lr_regnum);
319 /* By default, assume it's saved in the standard place, relative to
320 the frame pointer. */
321 return read_memory_integer (frame->frame + 8, 4);
325 /* Return true if REG is a caller-saves ("scratch") register,
328 is_caller_saves_reg (int reg)
330 return ((4 <= reg && reg <= 7)
331 || (14 <= reg && reg <= 15)
332 || (32 <= reg && reg <= 47));
336 /* Return true if REG is a callee-saves register, false otherwise. */
338 is_callee_saves_reg (int reg)
340 return ((16 <= reg && reg <= 31)
341 || (48 <= reg && reg <= 63));
345 /* Return true if REG is an argument register, false otherwise. */
347 is_argument_reg (int reg)
349 return (8 <= reg && reg <= 13);
353 /* Scan an FR-V prologue, starting at PC, until frame->PC.
354 If FRAME is non-zero, fill in its saved_regs with appropriate addresses.
355 We assume FRAME's saved_regs array has already been allocated and cleared.
356 Return the first PC value after the prologue.
358 Note that, for unoptimized code, we almost don't need this function
359 at all; all arguments and locals live on the stack, so we just need
360 the FP to find everything. The catch: structures passed by value
361 have their addresses living in registers; they're never spilled to
362 the stack. So if you ever want to be able to get to these
363 arguments in any frame but the top, you'll need to do this serious
364 prologue analysis. */
366 frv_analyze_prologue (CORE_ADDR pc, struct frame_info *frame)
368 /* When writing out instruction bitpatterns, we use the following
369 letters to label instruction fields:
370 P - The parallel bit. We don't use this.
371 J - The register number of GRj in the instruction description.
372 K - The register number of GRk in the instruction description.
373 I - The register number of GRi.
374 S - a signed imediate offset.
375 U - an unsigned immediate offset.
377 The dots below the numbers indicate where hex digit boundaries
378 fall, to make it easier to check the numbers. */
380 /* Non-zero iff we've seen the instruction that initializes the
381 frame pointer for this function's frame. */
384 /* If fp_set is non_zero, then this is the distance from
385 the stack pointer to frame pointer: fp = sp + fp_offset. */
388 /* Total size of frame prior to any alloca operations. */
391 /* The number of the general-purpose register we saved the return
392 address ("link register") in, or -1 if we haven't moved it yet. */
393 int lr_save_reg = -1;
395 /* Non-zero iff we've saved the LR onto the stack. */
396 int lr_saved_on_stack = 0;
398 /* If gr_saved[i] is non-zero, then we've noticed that general
399 register i has been saved at gr_sp_offset[i] from the stack
402 int gr_sp_offset[64];
404 memset (gr_saved, 0, sizeof (gr_saved));
406 while (! frame || pc < frame->pc)
408 LONGEST op = read_memory_integer (pc, 4);
410 /* The tests in this chain of ifs should be in order of
411 decreasing selectivity, so that more particular patterns get
412 to fire before less particular patterns. */
414 /* Setting the FP from the SP:
416 P 000010 0100010 000001 000000000000 = 0x04881000
417 0 111111 1111111 111111 111111111111 = 0x7fffffff
419 We treat this as part of the prologue. */
420 if ((op & 0x7fffffff) == 0x04881000)
426 /* Move the link register to the scratch register grJ, before saving:
428 P 000100 0000011 010000 000111 JJJJJJ = 0x080d01c0
429 0 111111 1111111 111111 111111 000000 = 0x7fffffc0
431 We treat this as part of the prologue. */
432 else if ((op & 0x7fffffc0) == 0x080d01c0)
434 int gr_j = op & 0x3f;
436 /* If we're moving it to a scratch register, that's fine. */
437 if (is_caller_saves_reg (gr_j))
439 /* Otherwise it's not a prologue instruction that we
445 /* To save multiple callee-saves registers on the stack, at
449 P KKKKKK 0000011 000001 000011 000000 = 0x000c10c0
450 0 000000 1111111 111111 111111 111111 = 0x01ffffff
453 P KKKKKK 0000011 000001 000100 000000 = 0x000c1100
454 0 000000 1111111 111111 111111 111111 = 0x01ffffff
456 We treat this as part of the prologue, and record the register's
457 saved address in the frame structure. */
458 else if ((op & 0x01ffffff) == 0x000c10c0
459 || (op & 0x01ffffff) == 0x000c1100)
461 int gr_k = ((op >> 25) & 0x3f);
462 int ope = ((op >> 6) & 0x3f);
466 /* Is it an std or an stq? */
472 /* Is it really a callee-saves register? */
473 if (is_callee_saves_reg (gr_k))
475 for (i = 0; i < count; i++)
477 gr_saved[gr_k + i] = 1;
478 gr_sp_offset[gr_k + i] = 4 * i;
482 /* It's not a prologue instruction. */
486 /* Adjusting the stack pointer. (The stack pointer is GR1.)
488 P 000001 0010000 000001 SSSSSSSSSSSS = 0x02401000
489 0 111111 1111111 111111 000000000000 = 0x7ffff000
491 We treat this as part of the prologue. */
492 else if ((op & 0x7ffff000) == 0x02401000)
494 /* Sign-extend the twelve-bit field.
495 (Isn't there a better way to do this?) */
496 int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
501 /* Setting the FP to a constant distance from the SP:
503 P 000010 0010000 000001 SSSSSSSSSSSS = 0x04401000
504 0 111111 1111111 111111 000000000000 = 0x7ffff000
506 We treat this as part of the prologue. */
507 else if ((op & 0x7ffff000) == 0x04401000)
509 /* Sign-extend the twelve-bit field.
510 (Isn't there a better way to do this?) */
511 int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
516 /* To spill an argument register to a scratch register:
518 P KKKKKK 0100010 IIIIII 000000000000 = 0x00880000
519 0 000000 1111111 000000 111111111111 = 0x01fc0fff
521 For the time being, we treat this as a prologue instruction,
522 assuming that GRi is an argument register. This one's kind
523 of suspicious, because it seems like it could be part of a
524 legitimate body instruction. But we only come here when the
525 source info wasn't helpful, so we have to do the best we can.
526 Hopefully once GCC and GDB agree on how to emit line number
527 info for prologues, then this code will never come into play. */
528 else if ((op & 0x01fc0fff) == 0x00880000)
530 int gr_i = ((op >> 12) & 0x3f);
532 /* If the source isn't an arg register, then this isn't a
533 prologue instruction. */
534 if (! is_argument_reg (gr_i))
538 /* To spill 16-bit values to the stack:
540 P KKKKKK 1010001 000010 SSSSSSSSSSSS = 0x01442000
541 0 000000 1111111 111111 000000000000 = 0x01fff000
543 And for 8-bit values, we use STB instructions.
545 P KKKKKK 1010000 000010 SSSSSSSSSSSS = 0x01402000
546 0 000000 1111111 111111 000000000000 = 0x01fff000
548 We check that GRk is really an argument register, and treat
549 all such as part of the prologue. */
550 else if ( (op & 0x01fff000) == 0x01442000
551 || (op & 0x01fff000) == 0x01402000)
553 int gr_k = ((op >> 25) & 0x3f);
555 if (! is_argument_reg (gr_k))
556 break; /* Source isn't an arg register. */
559 /* To save multiple callee-saves register on the stack, at a
563 P KKKKKK 1010011 000001 SSSSSSSSSSSS = 0x014c1000
564 0 000000 1111111 111111 000000000000 = 0x01fff000
567 P KKKKKK 1010100 000001 SSSSSSSSSSSS = 0x01501000
568 0 000000 1111111 111111 000000000000 = 0x01fff000
570 We treat this as part of the prologue, and record the register's
571 saved address in the frame structure. */
572 else if ((op & 0x01fff000) == 0x014c1000
573 || (op & 0x01fff000) == 0x01501000)
575 int gr_k = ((op >> 25) & 0x3f);
579 /* Is it a stdi or a stqi? */
580 if ((op & 0x01fff000) == 0x014c1000)
585 /* Is it really a callee-saves register? */
586 if (is_callee_saves_reg (gr_k))
588 /* Sign-extend the twelve-bit field.
589 (Isn't there a better way to do this?) */
590 int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
592 for (i = 0; i < count; i++)
594 gr_saved[gr_k + i] = 1;
595 gr_sp_offset[gr_k + i] = s + (4 * i);
599 /* It's not a prologue instruction. */
603 /* Storing any kind of integer register at any constant offset
604 from any other register.
607 P KKKKKK 0000011 IIIIII 000010 000000 = 0x000c0080
608 0 000000 1111111 000000 111111 111111 = 0x01fc0fff
611 P KKKKKK 1010010 IIIIII SSSSSSSSSSSS = 0x01480000
612 0 000000 1111111 000000 000000000000 = 0x01fc0000
614 These could be almost anything, but a lot of prologue
615 instructions fall into this pattern, so let's decode the
616 instruction once, and then work at a higher level. */
617 else if (((op & 0x01fc0fff) == 0x000c0080)
618 || ((op & 0x01fc0000) == 0x01480000))
620 int gr_k = ((op >> 25) & 0x3f);
621 int gr_i = ((op >> 12) & 0x3f);
624 /* Are we storing with gr0 as an offset, or using an
626 if ((op & 0x01fc0fff) == 0x000c0080)
629 offset = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
631 /* If the address isn't relative to the SP or FP, it's not a
632 prologue instruction. */
633 if (gr_i != sp_regnum && gr_i != fp_regnum)
636 /* Saving the old FP in the new frame (relative to the SP). */
637 if (gr_k == fp_regnum && gr_i == sp_regnum)
640 /* Saving callee-saves register(s) on the stack, relative to
642 else if (gr_i == sp_regnum
643 && is_callee_saves_reg (gr_k))
646 gr_sp_offset[gr_k] = offset;
649 /* Saving the scratch register holding the return address. */
650 else if (lr_save_reg != -1
651 && gr_k == lr_save_reg)
652 lr_saved_on_stack = 1;
654 /* Spilling int-sized arguments to the stack. */
655 else if (is_argument_reg (gr_k))
658 /* It's not a store instruction we recognize, so this must
659 be the end of the prologue. */
664 /* It's not any instruction we recognize, so this must be the end
674 frame->extra_info->lr_saved_on_stack = lr_saved_on_stack;
676 /* If we know the relationship between the stack and frame
677 pointers, record the addresses of the registers we noticed.
678 Note that we have to do this as a separate step at the end,
679 because instructions may save relative to the SP, but we need
680 their addresses relative to the FP. */
685 for (i = 0; i < 64; i++)
687 frame->saved_regs[i] = (frame->frame
688 - fp_offset + gr_sp_offset[i]);
690 frame->extra_info->fp_to_callers_sp_offset = framesize - fp_offset;
699 frv_skip_prologue (CORE_ADDR pc)
701 CORE_ADDR func_addr, func_end, new_pc;
705 /* If the line table has entry for a line *within* the function
706 (i.e., not in the prologue, and not past the end), then that's
708 if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
710 struct symtab_and_line sal;
712 sal = find_pc_line (func_addr, 0);
714 if (sal.line != 0 && sal.end < func_end)
720 /* The FR-V prologue is at least five instructions long (twenty bytes).
721 If we didn't find a real source location past that, then
722 do a full analysis of the prologue. */
723 if (new_pc < pc + 20)
724 new_pc = frv_analyze_prologue (pc, 0);
730 frv_frame_init_saved_regs (struct frame_info *frame)
732 if (frame->saved_regs)
735 frame_saved_regs_zalloc (frame);
736 frame->saved_regs[fp_regnum] = frame->frame;
738 /* Find the beginning of this function, so we can analyze its
741 CORE_ADDR func_addr, func_end;
743 if (find_pc_partial_function (frame->pc, NULL, &func_addr, &func_end))
744 frv_analyze_prologue (func_addr, frame);
748 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
749 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
750 and TYPE is the type (which is known to be struct, union or array).
752 The frv returns all structs in memory. */
755 frv_use_struct_convention (int gcc_p, struct type *type)
761 frv_extract_return_value (struct type *type, char *regbuf, char *valbuf)
763 memcpy (valbuf, (regbuf
764 + frv_register_byte (8)
765 + (TYPE_LENGTH (type) < 4 ? 4 - TYPE_LENGTH (type) : 0)),
770 frv_extract_struct_value_address (char *regbuf)
772 return extract_address (regbuf + frv_register_byte (struct_return_regnum),
777 frv_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
779 write_register (struct_return_regnum, addr);
783 frv_frameless_function_invocation (struct frame_info *frame)
785 return frameless_look_for_prologue (frame);
789 frv_saved_pc_after_call (struct frame_info *frame)
791 return read_register (lr_regnum);
795 frv_init_extra_frame_info (int fromleaf, struct frame_info *frame)
797 frame->extra_info = (struct frame_extra_info *)
798 frame_obstack_alloc (sizeof (struct frame_extra_info));
799 frame->extra_info->fp_to_callers_sp_offset = 0;
800 frame->extra_info->lr_saved_on_stack = 0;
803 #define ROUND_UP(n,a) (((n)+(a)-1) & ~((a)-1))
804 #define ROUND_DOWN(n,a) ((n) & ~((a)-1))
807 frv_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
808 int struct_return, CORE_ADDR struct_addr)
815 struct type *arg_type;
817 enum type_code typecode;
823 printf("Push %d args at sp = %x, struct_return=%d (%x)\n",
824 nargs, (int) sp, struct_return, struct_addr);
828 for (argnum = 0; argnum < nargs; ++argnum)
829 stack_space += ROUND_UP (TYPE_LENGTH (VALUE_TYPE (args[argnum])), 4);
831 stack_space -= (6 * 4);
835 /* Make sure stack is dword aligned. */
836 sp = ROUND_DOWN (sp, 8);
843 write_register (struct_return_regnum, struct_addr);
845 for (argnum = 0; argnum < nargs; ++argnum)
848 arg_type = check_typedef (VALUE_TYPE (arg));
849 len = TYPE_LENGTH (arg_type);
850 typecode = TYPE_CODE (arg_type);
852 if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)
854 store_address (valbuf, 4, VALUE_ADDRESS (arg));
855 typecode = TYPE_CODE_PTR;
861 val = (char *) VALUE_CONTENTS (arg);
866 int partial_len = (len < 4 ? len : 4);
870 regval = extract_address (val, partial_len);
872 printf(" Argnum %d data %x -> reg %d\n",
873 argnum, (int) regval, argreg);
875 write_register (argreg, regval);
881 printf(" Argnum %d data %x -> offset %d (%x)\n",
882 argnum, *((int *)val), stack_offset, (int) (sp + stack_offset));
884 write_memory (sp + stack_offset, val, partial_len);
885 stack_offset += ROUND_UP(partial_len, 4);
895 frv_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
897 write_register (lr_regnum, CALL_DUMMY_ADDRESS ());
902 frv_store_return_value (struct type *type, char *valbuf)
904 int length = TYPE_LENGTH (type);
905 int reg8_offset = frv_register_byte (8);
908 write_register_bytes (reg8_offset + (4 - length), valbuf, length);
909 else if (length == 8)
910 write_register_bytes (reg8_offset, valbuf, length);
912 internal_error (__FILE__, __LINE__,
913 "Don't know how to return a %d-byte value.", length);
919 generic_pop_current_frame (frv_pop_frame_regular);
923 frv_pop_frame_regular (struct frame_info *frame)
930 frv_frame_init_saved_regs (frame);
932 write_register (pc_regnum, frv_frame_saved_pc (frame));
933 for (regno = 0; regno < frv_num_regs; ++regno)
935 if (frame->saved_regs[regno]
936 && regno != pc_regnum
937 && regno != sp_regnum)
939 write_register (regno,
940 read_memory_integer (frame->saved_regs[regno], 4));
943 write_register (sp_regnum, fp + frame->extra_info->fp_to_callers_sp_offset);
944 flush_cached_frames ();
949 frv_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes,
950 CORE_ADDR *targ_addr, int *targ_len)
952 *targ_addr = memaddr;
953 *targ_len = nr_bytes;
957 /* Hardware watchpoint / breakpoint support for the FR500
961 frv_check_watch_resources (int type, int cnt, int ot)
963 struct gdbarch_tdep *var = CURRENT_VARIANT;
965 /* Watchpoints not supported on simulator. */
966 if (strcmp (target_shortname, "sim") == 0)
969 if (type == bp_hardware_breakpoint)
971 if (var->num_hw_breakpoints == 0)
973 else if (cnt <= var->num_hw_breakpoints)
978 if (var->num_hw_watchpoints == 0)
982 else if (cnt <= var->num_hw_watchpoints)
990 frv_stopped_data_address ()
992 CORE_ADDR brr, dbar0, dbar1, dbar2, dbar3;
994 brr = read_register (brr_regnum);
995 dbar0 = read_register (dbar0_regnum);
996 dbar1 = read_register (dbar1_regnum);
997 dbar2 = read_register (dbar2_regnum);
998 dbar3 = read_register (dbar3_regnum);
1002 else if (brr & (1<<10))
1004 else if (brr & (1<<9))
1006 else if (brr & (1<<8))
1012 static struct gdbarch *
1013 frv_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1015 struct gdbarch *gdbarch;
1016 struct gdbarch_tdep *var;
1018 /* Check to see if we've already built an appropriate architecture
1019 object for this executable. */
1020 arches = gdbarch_list_lookup_by_info (arches, &info);
1022 return arches->gdbarch;
1024 /* Select the right tdep structure for this variant. */
1025 var = new_variant ();
1026 switch (info.bfd_arch_info->mach)
1029 case bfd_mach_frvsimple:
1030 case bfd_mach_fr500:
1031 case bfd_mach_frvtomcat:
1032 set_variant_num_gprs (var, 64);
1033 set_variant_num_fprs (var, 64);
1036 case bfd_mach_fr400:
1037 set_variant_num_gprs (var, 32);
1038 set_variant_num_fprs (var, 32);
1042 /* Never heard of this variant. */
1046 gdbarch = gdbarch_alloc (&info, var);
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_max_register_raw_size (gdbarch, 4);
1068 set_gdbarch_register_virtual_size (gdbarch, frv_register_virtual_size);
1069 set_gdbarch_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_frame_chain_valid (gdbarch, func_frame_chain_valid);
1083 set_gdbarch_frame_saved_pc (gdbarch, frv_frame_saved_pc);
1084 set_gdbarch_frame_args_address (gdbarch, default_frame_address);
1085 set_gdbarch_frame_locals_address (gdbarch, default_frame_address);
1087 set_gdbarch_frame_init_saved_regs (gdbarch, frv_frame_init_saved_regs);
1089 set_gdbarch_use_struct_convention (gdbarch, frv_use_struct_convention);
1090 set_gdbarch_deprecated_extract_return_value (gdbarch, frv_extract_return_value);
1092 set_gdbarch_store_struct_return (gdbarch, frv_store_struct_return);
1093 set_gdbarch_store_return_value (gdbarch, frv_store_return_value);
1094 set_gdbarch_deprecated_extract_struct_value_address (gdbarch, frv_extract_struct_value_address);
1096 /* Settings for calling functions in the inferior. */
1097 set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
1098 set_gdbarch_call_dummy_length (gdbarch, 0);
1099 set_gdbarch_coerce_float_to_double (gdbarch,
1100 standard_coerce_float_to_double);
1101 set_gdbarch_push_arguments (gdbarch, frv_push_arguments);
1102 set_gdbarch_push_return_address (gdbarch, frv_push_return_address);
1103 set_gdbarch_pop_frame (gdbarch, frv_pop_frame);
1105 set_gdbarch_call_dummy_p (gdbarch, 1);
1106 set_gdbarch_call_dummy_words (gdbarch, frv_call_dummy_words);
1107 set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (frv_call_dummy_words));
1108 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
1109 set_gdbarch_init_extra_frame_info (gdbarch, frv_init_extra_frame_info);
1111 /* Settings that should be unnecessary. */
1112 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1114 set_gdbarch_read_pc (gdbarch, generic_target_read_pc);
1115 set_gdbarch_write_pc (gdbarch, generic_target_write_pc);
1116 set_gdbarch_read_fp (gdbarch, generic_target_read_fp);
1117 set_gdbarch_read_sp (gdbarch, generic_target_read_sp);
1118 set_gdbarch_write_sp (gdbarch, generic_target_write_sp);
1120 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
1121 set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
1122 set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
1123 set_gdbarch_call_dummy_start_offset (gdbarch, 0);
1124 set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point);
1125 set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
1126 set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
1127 set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
1129 set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register);
1131 set_gdbarch_decr_pc_after_break (gdbarch, 0);
1132 set_gdbarch_function_start_offset (gdbarch, 0);
1133 set_gdbarch_register_convertible (gdbarch, generic_register_convertible_not);
1135 set_gdbarch_remote_translate_xfer_address
1136 (gdbarch, frv_remote_translate_xfer_address);
1138 /* Hardware watchpoint / breakpoint support. */
1139 switch (info.bfd_arch_info->mach)
1142 case bfd_mach_frvsimple:
1143 case bfd_mach_fr500:
1144 case bfd_mach_frvtomcat:
1145 /* fr500-style hardware debugging support. */
1146 var->num_hw_watchpoints = 4;
1147 var->num_hw_breakpoints = 4;
1150 case bfd_mach_fr400:
1151 /* fr400-style hardware debugging support. */
1152 var->num_hw_watchpoints = 2;
1153 var->num_hw_breakpoints = 4;
1157 /* Otherwise, assume we don't have hardware debugging support. */
1158 var->num_hw_watchpoints = 0;
1159 var->num_hw_breakpoints = 0;
1167 _initialize_frv_tdep (void)
1169 register_gdbarch_init (bfd_arch_frv, frv_gdbarch_init);
1171 tm_print_insn = print_insn_frv;