1 /* Target-dependent code for Mitsubishi D10V, for GDB.
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
31 #include "gdb_string.h"
38 #include "arch-utils.h"
41 #include "floatformat.h"
45 #define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
47 struct frame_extra_info
58 unsigned long (*dmap_register) (int nr);
59 unsigned long (*imap_register) (int nr);
62 /* These are the addresses the D10V-EVA board maps data and
63 instruction memory to. */
65 #define DMEM_START 0x2000000
66 #define IMEM_START 0x1000000
67 #define STACK_START 0x0007ffe
69 /* d10v register names. */
79 #define NR_DMAP_REGS (gdbarch_tdep (current_gdbarch)->nr_dmap_regs)
80 #define A0_REGNUM (gdbarch_tdep (current_gdbarch)->a0_regnum)
82 /* d10v calling convention. */
84 #define ARG1_REGNUM R0_REGNUM
86 #define RET1_REGNUM R0_REGNUM
90 extern void _initialize_d10v_tdep (void);
92 static void d10v_eva_prepare_to_trace (void);
94 static void d10v_eva_get_trace_data (void);
96 static int prologue_find_regs (unsigned short op, struct frame_info *fi,
99 static void d10v_frame_init_saved_regs (struct frame_info *);
101 static void do_d10v_pop_frame (struct frame_info *fi);
104 d10v_frame_chain_valid (CORE_ADDR chain, struct frame_info *frame)
106 return ((chain) != 0 && (frame) != 0
107 && (frame)->pc > IMEM_START
108 && !inside_entry_file (FRAME_SAVED_PC (frame)));
112 d10v_stack_align (CORE_ADDR len)
114 return (len + 1) & ~1;
117 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
118 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
119 and TYPE is the type (which is known to be struct, union or array).
121 The d10v returns anything less than 8 bytes in size in
125 d10v_use_struct_convention (int gcc_p, struct type *type)
129 /* The d10v only passes a struct in a register when that structure
130 has an alignment that matches the size of a register. */
131 /* If the structure doesn't fit in 4 registers, put it on the
133 if (TYPE_LENGTH (type) > 8)
135 /* If the struct contains only one field, don't put it on the stack
136 - gcc can fit it in one or more registers. */
137 if (TYPE_NFIELDS (type) == 1)
139 alignment = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
140 for (i = 1; i < TYPE_NFIELDS (type); i++)
142 /* If the alignment changes, just assume it goes on the
144 if (TYPE_LENGTH (TYPE_FIELD_TYPE (type, i)) != alignment)
147 /* If the alignment is suitable for the d10v's 16 bit registers,
148 don't put it on the stack. */
149 if (alignment == 2 || alignment == 4)
155 static unsigned char *
156 d10v_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
158 static unsigned char breakpoint[] =
159 {0x2f, 0x90, 0x5e, 0x00};
160 *lenptr = sizeof (breakpoint);
164 /* Map the REG_NR onto an ascii name. Return NULL or an empty string
165 when the reg_nr isn't valid. */
169 TS2_IMAP0_REGNUM = 32,
170 TS2_DMAP_REGNUM = 34,
171 TS2_NR_DMAP_REGS = 1,
176 d10v_ts2_register_name (int reg_nr)
178 static char *register_names[] =
180 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
181 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
182 "psw", "bpsw", "pc", "bpc", "cr4", "cr5", "cr6", "rpt_c",
183 "rpt_s", "rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",
184 "imap0", "imap1", "dmap", "a0", "a1"
188 if (reg_nr >= (sizeof (register_names) / sizeof (*register_names)))
190 return register_names[reg_nr];
195 TS3_IMAP0_REGNUM = 36,
196 TS3_DMAP0_REGNUM = 38,
197 TS3_NR_DMAP_REGS = 4,
202 d10v_ts3_register_name (int reg_nr)
204 static char *register_names[] =
206 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
207 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
208 "psw", "bpsw", "pc", "bpc", "cr4", "cr5", "cr6", "rpt_c",
209 "rpt_s", "rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",
213 "dmap0", "dmap1", "dmap2", "dmap3"
217 if (reg_nr >= (sizeof (register_names) / sizeof (*register_names)))
219 return register_names[reg_nr];
222 /* Access the DMAP/IMAP registers in a target independent way.
224 Divide the D10V's 64k data space into four 16k segments:
225 0x0000 -- 0x3fff, 0x4000 -- 0x7fff, 0x8000 -- 0xbfff, and
228 On the TS2, the first two segments (0x0000 -- 0x3fff, 0x4000 --
229 0x7fff) always map to the on-chip data RAM, and the fourth always
230 maps to I/O space. The third (0x8000 - 0xbfff) can be mapped into
231 unified memory or instruction memory, under the control of the
232 single DMAP register.
234 On the TS3, there are four DMAP registers, each of which controls
235 one of the segments. */
238 d10v_ts2_dmap_register (int reg_nr)
246 return read_register (TS2_DMAP_REGNUM);
253 d10v_ts3_dmap_register (int reg_nr)
255 return read_register (TS3_DMAP0_REGNUM + reg_nr);
259 d10v_dmap_register (int reg_nr)
261 return gdbarch_tdep (current_gdbarch)->dmap_register (reg_nr);
265 d10v_ts2_imap_register (int reg_nr)
267 return read_register (TS2_IMAP0_REGNUM + reg_nr);
271 d10v_ts3_imap_register (int reg_nr)
273 return read_register (TS3_IMAP0_REGNUM + reg_nr);
277 d10v_imap_register (int reg_nr)
279 return gdbarch_tdep (current_gdbarch)->imap_register (reg_nr);
282 /* MAP GDB's internal register numbering (determined by the layout fo
283 the REGISTER_BYTE array) onto the simulator's register
287 d10v_ts2_register_sim_regno (int nr)
289 if (nr >= TS2_IMAP0_REGNUM
290 && nr < TS2_IMAP0_REGNUM + NR_IMAP_REGS)
291 return nr - TS2_IMAP0_REGNUM + SIM_D10V_IMAP0_REGNUM;
292 if (nr == TS2_DMAP_REGNUM)
293 return nr - TS2_DMAP_REGNUM + SIM_D10V_TS2_DMAP_REGNUM;
294 if (nr >= TS2_A0_REGNUM
295 && nr < TS2_A0_REGNUM + NR_A_REGS)
296 return nr - TS2_A0_REGNUM + SIM_D10V_A0_REGNUM;
301 d10v_ts3_register_sim_regno (int nr)
303 if (nr >= TS3_IMAP0_REGNUM
304 && nr < TS3_IMAP0_REGNUM + NR_IMAP_REGS)
305 return nr - TS3_IMAP0_REGNUM + SIM_D10V_IMAP0_REGNUM;
306 if (nr >= TS3_DMAP0_REGNUM
307 && nr < TS3_DMAP0_REGNUM + TS3_NR_DMAP_REGS)
308 return nr - TS3_DMAP0_REGNUM + SIM_D10V_DMAP0_REGNUM;
309 if (nr >= TS3_A0_REGNUM
310 && nr < TS3_A0_REGNUM + NR_A_REGS)
311 return nr - TS3_A0_REGNUM + SIM_D10V_A0_REGNUM;
315 /* Index within `registers' of the first byte of the space for
319 d10v_register_byte (int reg_nr)
321 if (reg_nr < A0_REGNUM)
323 else if (reg_nr < (A0_REGNUM + NR_A_REGS))
324 return (A0_REGNUM * 2
325 + (reg_nr - A0_REGNUM) * 8);
327 return (A0_REGNUM * 2
329 + (reg_nr - A0_REGNUM - NR_A_REGS) * 2);
332 /* Number of bytes of storage in the actual machine representation for
336 d10v_register_raw_size (int reg_nr)
338 if (reg_nr < A0_REGNUM)
340 else if (reg_nr < (A0_REGNUM + NR_A_REGS))
346 /* Return the GDB type object for the "standard" data type
347 of data in register N. */
350 d10v_register_virtual_type (int reg_nr)
352 if (reg_nr == PC_REGNUM)
353 return builtin_type_void_func_ptr;
354 else if (reg_nr >= A0_REGNUM
355 && reg_nr < (A0_REGNUM + NR_A_REGS))
356 return builtin_type_int64;
358 return builtin_type_int16;
362 d10v_make_daddr (CORE_ADDR x)
364 return ((x) | DMEM_START);
368 d10v_make_iaddr (CORE_ADDR x)
370 return (((x) << 2) | IMEM_START);
374 d10v_daddr_p (CORE_ADDR x)
376 return (((x) & 0x3000000) == DMEM_START);
380 d10v_iaddr_p (CORE_ADDR x)
382 return (((x) & 0x3000000) == IMEM_START);
387 d10v_convert_iaddr_to_raw (CORE_ADDR x)
389 return (((x) >> 2) & 0xffff);
393 d10v_convert_daddr_to_raw (CORE_ADDR x)
395 return ((x) & 0xffff);
399 d10v_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr)
401 /* Is it a code address? */
402 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
403 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD)
406 if (! d10v_iaddr_p (addr))
409 fprintf_unfiltered (gdb_stderr, "address `");
410 print_address_numeric (addr, 1, gdb_stderr);
411 fprintf_unfiltered (gdb_stderr, "' is not a code address\n");
415 store_unsigned_integer (buf, TYPE_LENGTH (type),
416 d10v_convert_iaddr_to_raw (addr));
420 /* Strip off any upper segment bits. */
421 store_unsigned_integer (buf, TYPE_LENGTH (type),
422 d10v_convert_daddr_to_raw (addr));
427 d10v_pointer_to_address (struct type *type, void *buf)
429 CORE_ADDR addr = extract_address (buf, TYPE_LENGTH (type));
431 /* Is it a code address? */
432 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
433 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD ||
434 (TYPE_FLAGS (TYPE_TARGET_TYPE (type)) & TYPE_FLAG_CODE_SPACE) != 0)
435 return d10v_make_iaddr (addr);
437 return d10v_make_daddr (addr);
441 d10v_integer_to_address (struct type *type, void *buf)
444 val = unpack_long (type, buf);
445 if (TYPE_CODE (type) == TYPE_CODE_INT
446 && TYPE_LENGTH (type) <= TYPE_LENGTH (builtin_type_void_data_ptr))
447 /* Convert small integers that would would be directly copied into
448 a pointer variable into an address pointing into data space. */
449 return d10v_make_daddr (val & 0xffff);
451 /* The value is too large to fit in a pointer. Assume this was
452 intentional and that the user in fact specified a raw address. */
456 /* Store the address of the place in which to copy the structure the
457 subroutine will return. This is called from call_function.
459 We store structs through a pointer passed in the first Argument
463 d10v_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
465 write_register (ARG1_REGNUM, (addr));
468 /* Write into appropriate registers a function return value
469 of type TYPE, given in virtual format.
471 Things always get returned in RET1_REGNUM, RET2_REGNUM, ... */
474 d10v_store_return_value (struct type *type, char *valbuf)
476 write_register_bytes (REGISTER_BYTE (RET1_REGNUM),
481 /* Extract from an array REGBUF containing the (raw) register state
482 the address in which a function should return its structure value,
483 as a CORE_ADDR (or an expression that can be used as one). */
486 d10v_extract_struct_value_address (char *regbuf)
488 return (extract_address ((regbuf) + REGISTER_BYTE (ARG1_REGNUM),
489 REGISTER_RAW_SIZE (ARG1_REGNUM))
494 d10v_frame_saved_pc (struct frame_info *frame)
496 return ((frame)->extra_info->return_pc);
499 /* Immediately after a function call, return the saved pc. We can't
500 use frame->return_pc beause that is determined by reading R13 off
501 the stack and that may not be written yet. */
504 d10v_saved_pc_after_call (struct frame_info *frame)
506 return ((read_register (LR_REGNUM) << 2)
510 /* Discard from the stack the innermost frame, restoring all saved
514 d10v_pop_frame (void)
516 generic_pop_current_frame (do_d10v_pop_frame);
520 do_d10v_pop_frame (struct frame_info *fi)
527 /* fill out fsr with the address of where each */
528 /* register was stored in the frame */
529 d10v_frame_init_saved_regs (fi);
531 /* now update the current registers with the old values */
532 for (regnum = A0_REGNUM; regnum < A0_REGNUM + NR_A_REGS; regnum++)
534 if (fi->saved_regs[regnum])
536 read_memory (fi->saved_regs[regnum], raw_buffer, REGISTER_RAW_SIZE (regnum));
537 write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, REGISTER_RAW_SIZE (regnum));
540 for (regnum = 0; regnum < SP_REGNUM; regnum++)
542 if (fi->saved_regs[regnum])
544 write_register (regnum, read_memory_unsigned_integer (fi->saved_regs[regnum], REGISTER_RAW_SIZE (regnum)));
547 if (fi->saved_regs[PSW_REGNUM])
549 write_register (PSW_REGNUM, read_memory_unsigned_integer (fi->saved_regs[PSW_REGNUM], REGISTER_RAW_SIZE (PSW_REGNUM)));
552 write_register (PC_REGNUM, read_register (LR_REGNUM));
553 write_register (SP_REGNUM, fp + fi->extra_info->size);
554 target_store_registers (-1);
555 flush_cached_frames ();
559 check_prologue (unsigned short op)
562 if ((op & 0x7E1F) == 0x6C1F)
566 if ((op & 0x7E3F) == 0x6E1F)
570 if ((op & 0x7FE1) == 0x01E1)
582 if ((op & 0x7E1F) == 0x681E)
586 if ((op & 0x7E3F) == 0x3A1E)
593 d10v_skip_prologue (CORE_ADDR pc)
596 unsigned short op1, op2;
597 CORE_ADDR func_addr, func_end;
598 struct symtab_and_line sal;
600 /* If we have line debugging information, then the end of the */
601 /* prologue should the first assembly instruction of the first source line */
602 if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
604 sal = find_pc_line (func_addr, 0);
605 if (sal.end && sal.end < func_end)
609 if (target_read_memory (pc, (char *) &op, 4))
610 return pc; /* Can't access it -- assume no prologue. */
614 op = (unsigned long) read_memory_integer (pc, 4);
615 if ((op & 0xC0000000) == 0xC0000000)
617 /* long instruction */
618 if (((op & 0x3FFF0000) != 0x01FF0000) && /* add3 sp,sp,n */
619 ((op & 0x3F0F0000) != 0x340F0000) && /* st rn, @(offset,sp) */
620 ((op & 0x3F1F0000) != 0x350F0000)) /* st2w rn, @(offset,sp) */
625 /* short instructions */
626 if ((op & 0xC0000000) == 0x80000000)
628 op2 = (op & 0x3FFF8000) >> 15;
633 op1 = (op & 0x3FFF8000) >> 15;
636 if (check_prologue (op1))
638 if (!check_prologue (op2))
640 /* if the previous opcode was really part of the prologue */
641 /* and not just a NOP, then we want to break after both instructions */
655 /* Given a GDB frame, determine the address of the calling function's frame.
656 This will be used to create a new GDB frame struct, and then
657 INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
661 d10v_frame_chain (struct frame_info *fi)
663 d10v_frame_init_saved_regs (fi);
665 if (fi->extra_info->return_pc == IMEM_START
666 || inside_entry_file (fi->extra_info->return_pc))
667 return (CORE_ADDR) 0;
669 if (!fi->saved_regs[FP_REGNUM])
671 if (!fi->saved_regs[SP_REGNUM]
672 || fi->saved_regs[SP_REGNUM] == STACK_START)
673 return (CORE_ADDR) 0;
675 return fi->saved_regs[SP_REGNUM];
678 if (!read_memory_unsigned_integer (fi->saved_regs[FP_REGNUM],
679 REGISTER_RAW_SIZE (FP_REGNUM)))
680 return (CORE_ADDR) 0;
682 return d10v_make_daddr (read_memory_unsigned_integer (fi->saved_regs[FP_REGNUM],
683 REGISTER_RAW_SIZE (FP_REGNUM)));
686 static int next_addr, uses_frame;
689 prologue_find_regs (unsigned short op, struct frame_info *fi, CORE_ADDR addr)
694 if ((op & 0x7E1F) == 0x6C1F)
696 n = (op & 0x1E0) >> 5;
698 fi->saved_regs[n] = next_addr;
703 else if ((op & 0x7E3F) == 0x6E1F)
705 n = (op & 0x1E0) >> 5;
707 fi->saved_regs[n] = next_addr;
708 fi->saved_regs[n + 1] = next_addr + 2;
713 if ((op & 0x7FE1) == 0x01E1)
715 n = (op & 0x1E) >> 1;
734 if ((op & 0x7E1F) == 0x681E)
736 n = (op & 0x1E0) >> 5;
737 fi->saved_regs[n] = next_addr;
742 if ((op & 0x7E3F) == 0x3A1E)
744 n = (op & 0x1E0) >> 5;
745 fi->saved_regs[n] = next_addr;
746 fi->saved_regs[n + 1] = next_addr + 2;
753 /* Put here the code to store, into fi->saved_regs, the addresses of
754 the saved registers of frame described by FRAME_INFO. This
755 includes special registers such as pc and fp saved in special ways
756 in the stack frame. sp is even more special: the address we return
757 for it IS the sp for the next frame. */
760 d10v_frame_init_saved_regs (struct frame_info *fi)
764 unsigned short op1, op2;
768 memset (fi->saved_regs, 0, SIZEOF_FRAME_SAVED_REGS);
771 pc = get_pc_function_start (fi->pc);
776 op = (unsigned long) read_memory_integer (pc, 4);
777 if ((op & 0xC0000000) == 0xC0000000)
779 /* long instruction */
780 if ((op & 0x3FFF0000) == 0x01FF0000)
783 short n = op & 0xFFFF;
786 else if ((op & 0x3F0F0000) == 0x340F0000)
788 /* st rn, @(offset,sp) */
789 short offset = op & 0xFFFF;
790 short n = (op >> 20) & 0xF;
791 fi->saved_regs[n] = next_addr + offset;
793 else if ((op & 0x3F1F0000) == 0x350F0000)
795 /* st2w rn, @(offset,sp) */
796 short offset = op & 0xFFFF;
797 short n = (op >> 20) & 0xF;
798 fi->saved_regs[n] = next_addr + offset;
799 fi->saved_regs[n + 1] = next_addr + offset + 2;
806 /* short instructions */
807 if ((op & 0xC0000000) == 0x80000000)
809 op2 = (op & 0x3FFF8000) >> 15;
814 op1 = (op & 0x3FFF8000) >> 15;
817 if (!prologue_find_regs (op1, fi, pc) || !prologue_find_regs (op2, fi, pc))
823 fi->extra_info->size = -next_addr;
826 fp = d10v_make_daddr (read_register (SP_REGNUM));
828 for (i = 0; i < NUM_REGS - 1; i++)
829 if (fi->saved_regs[i])
831 fi->saved_regs[i] = fp - (next_addr - fi->saved_regs[i]);
834 if (fi->saved_regs[LR_REGNUM])
836 CORE_ADDR return_pc = read_memory_unsigned_integer (fi->saved_regs[LR_REGNUM], REGISTER_RAW_SIZE (LR_REGNUM));
837 fi->extra_info->return_pc = d10v_make_iaddr (return_pc);
841 fi->extra_info->return_pc = d10v_make_iaddr (read_register (LR_REGNUM));
844 /* th SP is not normally (ever?) saved, but check anyway */
845 if (!fi->saved_regs[SP_REGNUM])
847 /* if the FP was saved, that means the current FP is valid, */
848 /* otherwise, it isn't being used, so we use the SP instead */
850 fi->saved_regs[SP_REGNUM] = read_register (FP_REGNUM) + fi->extra_info->size;
853 fi->saved_regs[SP_REGNUM] = fp + fi->extra_info->size;
854 fi->extra_info->frameless = 1;
855 fi->saved_regs[FP_REGNUM] = 0;
861 d10v_init_extra_frame_info (int fromleaf, struct frame_info *fi)
863 fi->extra_info = (struct frame_extra_info *)
864 frame_obstack_alloc (sizeof (struct frame_extra_info));
865 frame_saved_regs_zalloc (fi);
867 fi->extra_info->frameless = 0;
868 fi->extra_info->size = 0;
869 fi->extra_info->return_pc = 0;
871 /* The call dummy doesn't save any registers on the stack, so we can
873 if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
879 d10v_frame_init_saved_regs (fi);
884 show_regs (char *args, int from_tty)
887 printf_filtered ("PC=%04lx (0x%lx) PSW=%04lx RPT_S=%04lx RPT_E=%04lx RPT_C=%04lx\n",
888 (long) read_register (PC_REGNUM),
889 (long) d10v_make_iaddr (read_register (PC_REGNUM)),
890 (long) read_register (PSW_REGNUM),
891 (long) read_register (24),
892 (long) read_register (25),
893 (long) read_register (23));
894 printf_filtered ("R0-R7 %04lx %04lx %04lx %04lx %04lx %04lx %04lx %04lx\n",
895 (long) read_register (0),
896 (long) read_register (1),
897 (long) read_register (2),
898 (long) read_register (3),
899 (long) read_register (4),
900 (long) read_register (5),
901 (long) read_register (6),
902 (long) read_register (7));
903 printf_filtered ("R8-R15 %04lx %04lx %04lx %04lx %04lx %04lx %04lx %04lx\n",
904 (long) read_register (8),
905 (long) read_register (9),
906 (long) read_register (10),
907 (long) read_register (11),
908 (long) read_register (12),
909 (long) read_register (13),
910 (long) read_register (14),
911 (long) read_register (15));
912 for (a = 0; a < NR_IMAP_REGS; a++)
915 printf_filtered (" ");
916 printf_filtered ("IMAP%d %04lx", a, d10v_imap_register (a));
918 if (NR_DMAP_REGS == 1)
919 printf_filtered (" DMAP %04lx\n", d10v_dmap_register (2));
922 for (a = 0; a < NR_DMAP_REGS; a++)
924 printf_filtered (" DMAP%d %04lx", a, d10v_dmap_register (a));
926 printf_filtered ("\n");
928 printf_filtered ("A0-A%d", NR_A_REGS - 1);
929 for (a = A0_REGNUM; a < A0_REGNUM + NR_A_REGS; a++)
931 char num[MAX_REGISTER_RAW_SIZE];
933 printf_filtered (" ");
934 read_register_gen (a, (char *) &num);
935 for (i = 0; i < MAX_REGISTER_RAW_SIZE; i++)
937 printf_filtered ("%02x", (num[i] & 0xff));
940 printf_filtered ("\n");
944 d10v_read_pc (ptid_t ptid)
950 save_ptid = inferior_ptid;
951 inferior_ptid = ptid;
952 pc = (int) read_register (PC_REGNUM);
953 inferior_ptid = save_ptid;
954 retval = d10v_make_iaddr (pc);
959 d10v_write_pc (CORE_ADDR val, ptid_t ptid)
963 save_ptid = inferior_ptid;
964 inferior_ptid = ptid;
965 write_register (PC_REGNUM, d10v_convert_iaddr_to_raw (val));
966 inferior_ptid = save_ptid;
972 return (d10v_make_daddr (read_register (SP_REGNUM)));
976 d10v_write_sp (CORE_ADDR val)
978 write_register (SP_REGNUM, d10v_convert_daddr_to_raw (val));
982 d10v_write_fp (CORE_ADDR val)
984 write_register (FP_REGNUM, d10v_convert_daddr_to_raw (val));
990 return (d10v_make_daddr (read_register (FP_REGNUM)));
993 /* Function: push_return_address (pc)
994 Set up the return address for the inferior function call.
995 Needed for targets where we don't actually execute a JSR/BSR instruction */
998 d10v_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
1000 write_register (LR_REGNUM, d10v_convert_iaddr_to_raw (CALL_DUMMY_ADDRESS ()));
1005 /* When arguments must be pushed onto the stack, they go on in reverse
1006 order. The below implements a FILO (stack) to do this. */
1011 struct stack_item *prev;
1015 static struct stack_item *push_stack_item (struct stack_item *prev,
1016 void *contents, int len);
1017 static struct stack_item *
1018 push_stack_item (struct stack_item *prev, void *contents, int len)
1020 struct stack_item *si;
1021 si = xmalloc (sizeof (struct stack_item));
1022 si->data = xmalloc (len);
1025 memcpy (si->data, contents, len);
1029 static struct stack_item *pop_stack_item (struct stack_item *si);
1030 static struct stack_item *
1031 pop_stack_item (struct stack_item *si)
1033 struct stack_item *dead = si;
1042 d10v_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
1043 int struct_return, CORE_ADDR struct_addr)
1046 int regnum = ARG1_REGNUM;
1047 struct stack_item *si = NULL;
1049 /* Fill in registers and arg lists */
1050 for (i = 0; i < nargs; i++)
1052 struct value *arg = args[i];
1053 struct type *type = check_typedef (VALUE_TYPE (arg));
1054 char *contents = VALUE_CONTENTS (arg);
1055 int len = TYPE_LENGTH (type);
1056 /* printf ("push: type=%d len=%d\n", type->code, len); */
1058 int aligned_regnum = (regnum + 1) & ~1;
1059 if (len <= 2 && regnum <= ARGN_REGNUM)
1060 /* fits in a single register, do not align */
1062 long val = extract_unsigned_integer (contents, len);
1063 write_register (regnum++, val);
1065 else if (len <= (ARGN_REGNUM - aligned_regnum + 1) * 2)
1066 /* value fits in remaining registers, store keeping left
1070 regnum = aligned_regnum;
1071 for (b = 0; b < (len & ~1); b += 2)
1073 long val = extract_unsigned_integer (&contents[b], 2);
1074 write_register (regnum++, val);
1078 long val = extract_unsigned_integer (&contents[b], 1);
1079 write_register (regnum++, (val << 8));
1084 /* arg will go onto stack */
1085 regnum = ARGN_REGNUM + 1;
1086 si = push_stack_item (si, contents, len);
1093 sp = (sp - si->len) & ~1;
1094 write_memory (sp, si->data, si->len);
1095 si = pop_stack_item (si);
1102 /* Given a return value in `regbuf' with a type `valtype',
1103 extract and copy its value into `valbuf'. */
1106 d10v_extract_return_value (struct type *type, char regbuf[REGISTER_BYTES],
1110 /* printf("RET: TYPE=%d len=%d r%d=0x%x\n",type->code, TYPE_LENGTH (type), RET1_REGNUM - R0_REGNUM, (int) extract_unsigned_integer (regbuf + REGISTER_BYTE(RET1_REGNUM), REGISTER_RAW_SIZE (RET1_REGNUM))); */
1112 len = TYPE_LENGTH (type);
1115 unsigned short c = extract_unsigned_integer (regbuf + REGISTER_BYTE (RET1_REGNUM), REGISTER_RAW_SIZE (RET1_REGNUM));
1116 store_unsigned_integer (valbuf, 1, c);
1118 else if ((len & 1) == 0)
1119 memcpy (valbuf, regbuf + REGISTER_BYTE (RET1_REGNUM), len);
1122 /* For return values of odd size, the first byte is in the
1123 least significant part of the first register. The
1124 remaining bytes in remaining registers. Interestingly,
1125 when such values are passed in, the last byte is in the
1126 most significant byte of that same register - wierd. */
1127 memcpy (valbuf, regbuf + REGISTER_BYTE (RET1_REGNUM) + 1, len);
1132 /* Translate a GDB virtual ADDR/LEN into a format the remote target
1133 understands. Returns number of bytes that can be transfered
1134 starting at TARG_ADDR. Return ZERO if no bytes can be transfered
1135 (segmentation fault). Since the simulator knows all about how the
1136 VM system works, we just call that to do the translation. */
1139 remote_d10v_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes,
1140 CORE_ADDR *targ_addr, int *targ_len)
1144 out_len = sim_d10v_translate_addr (memaddr, nr_bytes,
1147 d10v_imap_register);
1148 *targ_addr = out_addr;
1149 *targ_len = out_len;
1153 /* The following code implements access to, and display of, the D10V's
1154 instruction trace buffer. The buffer consists of 64K or more
1155 4-byte words of data, of which each words includes an 8-bit count,
1156 an 8-bit segment number, and a 16-bit instruction address.
1158 In theory, the trace buffer is continuously capturing instruction
1159 data that the CPU presents on its "debug bus", but in practice, the
1160 ROMified GDB stub only enables tracing when it continues or steps
1161 the program, and stops tracing when the program stops; so it
1162 actually works for GDB to read the buffer counter out of memory and
1163 then read each trace word. The counter records where the tracing
1164 stops, but there is no record of where it started, so we remember
1165 the PC when we resumed and then search backwards in the trace
1166 buffer for a word that includes that address. This is not perfect,
1167 because you will miss trace data if the resumption PC is the target
1168 of a branch. (The value of the buffer counter is semi-random, any
1169 trace data from a previous program stop is gone.) */
1171 /* The address of the last word recorded in the trace buffer. */
1173 #define DBBC_ADDR (0xd80000)
1175 /* The base of the trace buffer, at least for the "Board_0". */
1177 #define TRACE_BUFFER_BASE (0xf40000)
1179 static void trace_command (char *, int);
1181 static void untrace_command (char *, int);
1183 static void trace_info (char *, int);
1185 static void tdisassemble_command (char *, int);
1187 static void display_trace (int, int);
1189 /* True when instruction traces are being collected. */
1193 /* Remembered PC. */
1195 static CORE_ADDR last_pc;
1197 /* True when trace output should be displayed whenever program stops. */
1199 static int trace_display;
1201 /* True when trace listing should include source lines. */
1203 static int default_trace_show_source = 1;
1214 trace_command (char *args, int from_tty)
1216 /* Clear the host-side trace buffer, allocating space if needed. */
1217 trace_data.size = 0;
1218 if (trace_data.counts == NULL)
1219 trace_data.counts = (short *) xmalloc (65536 * sizeof (short));
1220 if (trace_data.addrs == NULL)
1221 trace_data.addrs = (CORE_ADDR *) xmalloc (65536 * sizeof (CORE_ADDR));
1225 printf_filtered ("Tracing is now on.\n");
1229 untrace_command (char *args, int from_tty)
1233 printf_filtered ("Tracing is now off.\n");
1237 trace_info (char *args, int from_tty)
1241 if (trace_data.size)
1243 printf_filtered ("%d entries in trace buffer:\n", trace_data.size);
1245 for (i = 0; i < trace_data.size; ++i)
1247 printf_filtered ("%d: %d instruction%s at 0x%s\n",
1249 trace_data.counts[i],
1250 (trace_data.counts[i] == 1 ? "" : "s"),
1251 paddr_nz (trace_data.addrs[i]));
1255 printf_filtered ("No entries in trace buffer.\n");
1257 printf_filtered ("Tracing is currently %s.\n", (tracing ? "on" : "off"));
1260 /* Print the instruction at address MEMADDR in debugged memory,
1261 on STREAM. Returns length of the instruction, in bytes. */
1264 print_insn (CORE_ADDR memaddr, struct ui_file *stream)
1266 /* If there's no disassembler, something is very wrong. */
1267 if (tm_print_insn == NULL)
1268 internal_error (__FILE__, __LINE__,
1269 "print_insn: no disassembler");
1271 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
1272 tm_print_insn_info.endian = BFD_ENDIAN_BIG;
1274 tm_print_insn_info.endian = BFD_ENDIAN_LITTLE;
1275 return TARGET_PRINT_INSN (memaddr, &tm_print_insn_info);
1279 d10v_eva_prepare_to_trace (void)
1284 last_pc = read_register (PC_REGNUM);
1287 /* Collect trace data from the target board and format it into a form
1288 more useful for display. */
1291 d10v_eva_get_trace_data (void)
1293 int count, i, j, oldsize;
1294 int trace_addr, trace_seg, trace_cnt, next_cnt;
1295 unsigned int last_trace, trace_word, next_word;
1296 unsigned int *tmpspace;
1301 tmpspace = xmalloc (65536 * sizeof (unsigned int));
1303 last_trace = read_memory_unsigned_integer (DBBC_ADDR, 2) << 2;
1305 /* Collect buffer contents from the target, stopping when we reach
1306 the word recorded when execution resumed. */
1309 while (last_trace > 0)
1313 read_memory_unsigned_integer (TRACE_BUFFER_BASE + last_trace, 4);
1314 trace_addr = trace_word & 0xffff;
1316 /* Ignore an apparently nonsensical entry. */
1317 if (trace_addr == 0xffd5)
1319 tmpspace[count++] = trace_word;
1320 if (trace_addr == last_pc)
1326 /* Move the data to the host-side trace buffer, adjusting counts to
1327 include the last instruction executed and transforming the address
1328 into something that GDB likes. */
1330 for (i = 0; i < count; ++i)
1332 trace_word = tmpspace[i];
1333 next_word = ((i == 0) ? 0 : tmpspace[i - 1]);
1334 trace_addr = trace_word & 0xffff;
1335 next_cnt = (next_word >> 24) & 0xff;
1336 j = trace_data.size + count - i - 1;
1337 trace_data.addrs[j] = (trace_addr << 2) + 0x1000000;
1338 trace_data.counts[j] = next_cnt + 1;
1341 oldsize = trace_data.size;
1342 trace_data.size += count;
1347 display_trace (oldsize, trace_data.size);
1351 tdisassemble_command (char *arg, int from_tty)
1354 CORE_ADDR low, high;
1360 high = trace_data.size;
1362 else if (!(space_index = (char *) strchr (arg, ' ')))
1364 low = parse_and_eval_address (arg);
1369 /* Two arguments. */
1370 *space_index = '\0';
1371 low = parse_and_eval_address (arg);
1372 high = parse_and_eval_address (space_index + 1);
1377 printf_filtered ("Dump of trace from %s to %s:\n", paddr_u (low), paddr_u (high));
1379 display_trace (low, high);
1381 printf_filtered ("End of trace dump.\n");
1382 gdb_flush (gdb_stdout);
1386 display_trace (int low, int high)
1388 int i, count, trace_show_source, first, suppress;
1389 CORE_ADDR next_address;
1391 trace_show_source = default_trace_show_source;
1392 if (!have_full_symbols () && !have_partial_symbols ())
1394 trace_show_source = 0;
1395 printf_filtered ("No symbol table is loaded. Use the \"file\" command.\n");
1396 printf_filtered ("Trace will not display any source.\n");
1401 for (i = low; i < high; ++i)
1403 next_address = trace_data.addrs[i];
1404 count = trace_data.counts[i];
1408 if (trace_show_source)
1410 struct symtab_and_line sal, sal_prev;
1412 sal_prev = find_pc_line (next_address - 4, 0);
1413 sal = find_pc_line (next_address, 0);
1417 if (first || sal.line != sal_prev.line)
1418 print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
1424 /* FIXME-32x64--assumes sal.pc fits in long. */
1425 printf_filtered ("No source file for address %s.\n",
1426 local_hex_string ((unsigned long) sal.pc));
1431 print_address (next_address, gdb_stdout);
1432 printf_filtered (":");
1433 printf_filtered ("\t");
1435 next_address = next_address + print_insn (next_address, gdb_stdout);
1436 printf_filtered ("\n");
1437 gdb_flush (gdb_stdout);
1443 static gdbarch_init_ftype d10v_gdbarch_init;
1445 static struct gdbarch *
1446 d10v_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1448 static LONGEST d10v_call_dummy_words[] =
1450 struct gdbarch *gdbarch;
1452 struct gdbarch_tdep *tdep;
1453 gdbarch_register_name_ftype *d10v_register_name;
1454 gdbarch_register_sim_regno_ftype *d10v_register_sim_regno;
1456 /* Find a candidate among the list of pre-declared architectures. */
1457 arches = gdbarch_list_lookup_by_info (arches, &info);
1459 return arches->gdbarch;
1461 /* None found, create a new architecture from the information
1463 tdep = XMALLOC (struct gdbarch_tdep);
1464 gdbarch = gdbarch_alloc (&info, tdep);
1466 switch (info.bfd_arch_info->mach)
1468 case bfd_mach_d10v_ts2:
1470 d10v_register_name = d10v_ts2_register_name;
1471 d10v_register_sim_regno = d10v_ts2_register_sim_regno;
1472 tdep->a0_regnum = TS2_A0_REGNUM;
1473 tdep->nr_dmap_regs = TS2_NR_DMAP_REGS;
1474 tdep->dmap_register = d10v_ts2_dmap_register;
1475 tdep->imap_register = d10v_ts2_imap_register;
1478 case bfd_mach_d10v_ts3:
1480 d10v_register_name = d10v_ts3_register_name;
1481 d10v_register_sim_regno = d10v_ts3_register_sim_regno;
1482 tdep->a0_regnum = TS3_A0_REGNUM;
1483 tdep->nr_dmap_regs = TS3_NR_DMAP_REGS;
1484 tdep->dmap_register = d10v_ts3_dmap_register;
1485 tdep->imap_register = d10v_ts3_imap_register;
1489 set_gdbarch_read_pc (gdbarch, d10v_read_pc);
1490 set_gdbarch_write_pc (gdbarch, d10v_write_pc);
1491 set_gdbarch_read_fp (gdbarch, d10v_read_fp);
1492 set_gdbarch_write_fp (gdbarch, d10v_write_fp);
1493 set_gdbarch_read_sp (gdbarch, d10v_read_sp);
1494 set_gdbarch_write_sp (gdbarch, d10v_write_sp);
1496 set_gdbarch_num_regs (gdbarch, d10v_num_regs);
1497 set_gdbarch_sp_regnum (gdbarch, 15);
1498 set_gdbarch_fp_regnum (gdbarch, 11);
1499 set_gdbarch_pc_regnum (gdbarch, 18);
1500 set_gdbarch_register_name (gdbarch, d10v_register_name);
1501 set_gdbarch_register_size (gdbarch, 2);
1502 set_gdbarch_register_bytes (gdbarch, (d10v_num_regs - 2) * 2 + 16);
1503 set_gdbarch_register_byte (gdbarch, d10v_register_byte);
1504 set_gdbarch_register_raw_size (gdbarch, d10v_register_raw_size);
1505 set_gdbarch_max_register_raw_size (gdbarch, 8);
1506 set_gdbarch_register_virtual_size (gdbarch, generic_register_virtual_size);
1507 set_gdbarch_max_register_virtual_size (gdbarch, 8);
1508 set_gdbarch_register_virtual_type (gdbarch, d10v_register_virtual_type);
1510 set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT);
1511 set_gdbarch_addr_bit (gdbarch, 32);
1512 set_gdbarch_address_to_pointer (gdbarch, d10v_address_to_pointer);
1513 set_gdbarch_pointer_to_address (gdbarch, d10v_pointer_to_address);
1514 set_gdbarch_integer_to_address (gdbarch, d10v_integer_to_address);
1515 set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
1516 set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT);
1517 set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
1518 set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
1519 /* NOTE: The d10v as a 32 bit ``float'' and ``double''. ``long
1520 double'' is 64 bits. */
1521 set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
1522 set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT);
1523 set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
1524 switch (info.byte_order)
1527 set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_big);
1528 set_gdbarch_double_format (gdbarch, &floatformat_ieee_single_big);
1529 set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
1532 set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_little);
1533 set_gdbarch_double_format (gdbarch, &floatformat_ieee_single_little);
1534 set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_little);
1537 internal_error (__FILE__, __LINE__,
1538 "d10v_gdbarch_init: bad byte order for float format");
1541 set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
1542 set_gdbarch_call_dummy_length (gdbarch, 0);
1543 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
1544 set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
1545 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
1546 set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
1547 set_gdbarch_call_dummy_start_offset (gdbarch, 0);
1548 set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy);
1549 set_gdbarch_call_dummy_words (gdbarch, d10v_call_dummy_words);
1550 set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (d10v_call_dummy_words));
1551 set_gdbarch_call_dummy_p (gdbarch, 1);
1552 set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
1553 set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register);
1554 set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
1556 set_gdbarch_extract_return_value (gdbarch, d10v_extract_return_value);
1557 set_gdbarch_push_arguments (gdbarch, d10v_push_arguments);
1558 set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
1559 set_gdbarch_push_return_address (gdbarch, d10v_push_return_address);
1561 set_gdbarch_store_struct_return (gdbarch, d10v_store_struct_return);
1562 set_gdbarch_store_return_value (gdbarch, d10v_store_return_value);
1563 set_gdbarch_extract_struct_value_address (gdbarch, d10v_extract_struct_value_address);
1564 set_gdbarch_use_struct_convention (gdbarch, d10v_use_struct_convention);
1566 set_gdbarch_frame_init_saved_regs (gdbarch, d10v_frame_init_saved_regs);
1567 set_gdbarch_init_extra_frame_info (gdbarch, d10v_init_extra_frame_info);
1569 set_gdbarch_pop_frame (gdbarch, d10v_pop_frame);
1571 set_gdbarch_skip_prologue (gdbarch, d10v_skip_prologue);
1572 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1573 set_gdbarch_decr_pc_after_break (gdbarch, 4);
1574 set_gdbarch_function_start_offset (gdbarch, 0);
1575 set_gdbarch_breakpoint_from_pc (gdbarch, d10v_breakpoint_from_pc);
1577 set_gdbarch_remote_translate_xfer_address (gdbarch, remote_d10v_translate_xfer_address);
1579 set_gdbarch_frame_args_skip (gdbarch, 0);
1580 set_gdbarch_frameless_function_invocation (gdbarch, frameless_look_for_prologue);
1581 set_gdbarch_frame_chain (gdbarch, d10v_frame_chain);
1582 set_gdbarch_frame_chain_valid (gdbarch, d10v_frame_chain_valid);
1583 set_gdbarch_frame_saved_pc (gdbarch, d10v_frame_saved_pc);
1584 set_gdbarch_frame_args_address (gdbarch, default_frame_address);
1585 set_gdbarch_frame_locals_address (gdbarch, default_frame_address);
1586 set_gdbarch_saved_pc_after_call (gdbarch, d10v_saved_pc_after_call);
1587 set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
1588 set_gdbarch_stack_align (gdbarch, d10v_stack_align);
1590 set_gdbarch_register_sim_regno (gdbarch, d10v_register_sim_regno);
1591 set_gdbarch_extra_stack_alignment_needed (gdbarch, 0);
1597 extern void (*target_resume_hook) (void);
1598 extern void (*target_wait_loop_hook) (void);
1601 _initialize_d10v_tdep (void)
1603 register_gdbarch_init (bfd_arch_d10v, d10v_gdbarch_init);
1605 tm_print_insn = print_insn_d10v;
1607 target_resume_hook = d10v_eva_prepare_to_trace;
1608 target_wait_loop_hook = d10v_eva_get_trace_data;
1610 add_com ("regs", class_vars, show_regs, "Print all registers");
1612 add_com ("itrace", class_support, trace_command,
1613 "Enable tracing of instruction execution.");
1615 add_com ("iuntrace", class_support, untrace_command,
1616 "Disable tracing of instruction execution.");
1618 add_com ("itdisassemble", class_vars, tdisassemble_command,
1619 "Disassemble the trace buffer.\n\
1620 Two optional arguments specify a range of trace buffer entries\n\
1621 as reported by info trace (NOT addresses!).");
1623 add_info ("itrace", trace_info,
1624 "Display info about the trace data buffer.");
1626 add_show_from_set (add_set_cmd ("itracedisplay", no_class,
1627 var_integer, (char *) &trace_display,
1628 "Set automatic display of trace.\n", &setlist),
1630 add_show_from_set (add_set_cmd ("itracesource", no_class,
1631 var_integer, (char *) &default_trace_show_source,
1632 "Set display of source code with trace.\n", &setlist),