1 /* Target-dependent code for Mitsubishi D10V, for GDB.
3 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
27 #include "frame-unwind.h"
28 #include "frame-base.h"
33 #include "gdb_string.h"
40 #include "arch-utils.h"
43 #include "floatformat.h"
44 #include "gdb/sim-d10v.h"
45 #include "sim-regno.h"
48 #include "gdb_assert.h"
54 unsigned long (*dmap_register) (void *regcache, int nr);
55 unsigned long (*imap_register) (void *regcache, int nr);
58 /* These are the addresses the D10V-EVA board maps data and
59 instruction memory to. */
62 DMEM_START = 0x2000000,
63 IMEM_START = 0x1000000,
64 STACK_START = 0x200bffe
67 /* d10v register names. */
82 /* d10v calling convention. */
83 ARG1_REGNUM = R0_REGNUM,
84 ARGN_REGNUM = R3_REGNUM,
85 RET1_REGNUM = R0_REGNUM,
89 nr_dmap_regs (struct gdbarch *gdbarch)
91 return gdbarch_tdep (gdbarch)->nr_dmap_regs;
95 a0_regnum (struct gdbarch *gdbarch)
97 return gdbarch_tdep (gdbarch)->a0_regnum;
100 /* Local functions */
102 extern void _initialize_d10v_tdep (void);
104 static CORE_ADDR d10v_read_sp (void);
106 static void d10v_eva_prepare_to_trace (void);
108 static void d10v_eva_get_trace_data (void);
111 d10v_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
113 /* Align to the size of an instruction (so that they can safely be
114 pushed onto the stack. */
118 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
119 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
120 and TYPE is the type (which is known to be struct, union or array).
122 The d10v returns anything less than 8 bytes in size in
126 d10v_use_struct_convention (int gcc_p, struct type *type)
130 /* The d10v only passes a struct in a register when that structure
131 has an alignment that matches the size of a register. */
132 /* If the structure doesn't fit in 4 registers, put it on the
134 if (TYPE_LENGTH (type) > 8)
136 /* If the struct contains only one field, don't put it on the stack
137 - gcc can fit it in one or more registers. */
138 if (TYPE_NFIELDS (type) == 1)
140 alignment = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
141 for (i = 1; i < TYPE_NFIELDS (type); i++)
143 /* If the alignment changes, just assume it goes on the
145 if (TYPE_LENGTH (TYPE_FIELD_TYPE (type, i)) != alignment)
148 /* If the alignment is suitable for the d10v's 16 bit registers,
149 don't put it on the stack. */
150 if (alignment == 2 || alignment == 4)
156 static const unsigned char *
157 d10v_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
159 static unsigned char breakpoint[] =
160 {0x2f, 0x90, 0x5e, 0x00};
161 *lenptr = sizeof (breakpoint);
165 /* Map the REG_NR onto an ascii name. Return NULL or an empty string
166 when the reg_nr isn't valid. */
170 TS2_IMAP0_REGNUM = 32,
171 TS2_DMAP_REGNUM = 34,
172 TS2_NR_DMAP_REGS = 1,
177 d10v_ts2_register_name (int reg_nr)
179 static char *register_names[] =
181 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
182 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
183 "psw", "bpsw", "pc", "bpc", "cr4", "cr5", "cr6", "rpt_c",
184 "rpt_s", "rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",
185 "imap0", "imap1", "dmap", "a0", "a1"
189 if (reg_nr >= (sizeof (register_names) / sizeof (*register_names)))
191 return register_names[reg_nr];
196 TS3_IMAP0_REGNUM = 36,
197 TS3_DMAP0_REGNUM = 38,
198 TS3_NR_DMAP_REGS = 4,
203 d10v_ts3_register_name (int reg_nr)
205 static char *register_names[] =
207 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
208 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
209 "psw", "bpsw", "pc", "bpc", "cr4", "cr5", "cr6", "rpt_c",
210 "rpt_s", "rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",
214 "dmap0", "dmap1", "dmap2", "dmap3"
218 if (reg_nr >= (sizeof (register_names) / sizeof (*register_names)))
220 return register_names[reg_nr];
223 /* Access the DMAP/IMAP registers in a target independent way.
225 Divide the D10V's 64k data space into four 16k segments:
226 0x0000 -- 0x3fff, 0x4000 -- 0x7fff, 0x8000 -- 0xbfff, and
229 On the TS2, the first two segments (0x0000 -- 0x3fff, 0x4000 --
230 0x7fff) always map to the on-chip data RAM, and the fourth always
231 maps to I/O space. The third (0x8000 - 0xbfff) can be mapped into
232 unified memory or instruction memory, under the control of the
233 single DMAP register.
235 On the TS3, there are four DMAP registers, each of which controls
236 one of the segments. */
239 d10v_ts2_dmap_register (void *regcache, int reg_nr)
249 regcache_cooked_read_unsigned (regcache, TS2_DMAP_REGNUM, ®);
258 d10v_ts3_dmap_register (void *regcache, int reg_nr)
261 regcache_cooked_read_unsigned (regcache, TS3_DMAP0_REGNUM + reg_nr, ®);
266 d10v_ts2_imap_register (void *regcache, int reg_nr)
269 regcache_cooked_read_unsigned (regcache, TS2_IMAP0_REGNUM + reg_nr, ®);
274 d10v_ts3_imap_register (void *regcache, int reg_nr)
277 regcache_cooked_read_unsigned (regcache, TS3_IMAP0_REGNUM + reg_nr, ®);
281 /* MAP GDB's internal register numbering (determined by the layout fo
282 the REGISTER_BYTE array) onto the simulator's register
286 d10v_ts2_register_sim_regno (int nr)
288 /* Only makes sense to supply raw registers. */
289 gdb_assert (nr >= 0 && nr < NUM_REGS);
290 if (nr >= TS2_IMAP0_REGNUM
291 && nr < TS2_IMAP0_REGNUM + NR_IMAP_REGS)
292 return nr - TS2_IMAP0_REGNUM + SIM_D10V_IMAP0_REGNUM;
293 if (nr == TS2_DMAP_REGNUM)
294 return nr - TS2_DMAP_REGNUM + SIM_D10V_TS2_DMAP_REGNUM;
295 if (nr >= TS2_A0_REGNUM
296 && nr < TS2_A0_REGNUM + NR_A_REGS)
297 return nr - TS2_A0_REGNUM + SIM_D10V_A0_REGNUM;
302 d10v_ts3_register_sim_regno (int nr)
304 /* Only makes sense to supply raw registers. */
305 gdb_assert (nr >= 0 && nr < NUM_REGS);
306 if (nr >= TS3_IMAP0_REGNUM
307 && nr < TS3_IMAP0_REGNUM + NR_IMAP_REGS)
308 return nr - TS3_IMAP0_REGNUM + SIM_D10V_IMAP0_REGNUM;
309 if (nr >= TS3_DMAP0_REGNUM
310 && nr < TS3_DMAP0_REGNUM + TS3_NR_DMAP_REGS)
311 return nr - TS3_DMAP0_REGNUM + SIM_D10V_DMAP0_REGNUM;
312 if (nr >= TS3_A0_REGNUM
313 && nr < TS3_A0_REGNUM + NR_A_REGS)
314 return nr - TS3_A0_REGNUM + SIM_D10V_A0_REGNUM;
318 /* Return the GDB type object for the "standard" data type
319 of data in register N. */
322 d10v_register_type (struct gdbarch *gdbarch, int reg_nr)
324 if (reg_nr == D10V_PC_REGNUM)
325 return builtin_type_void_func_ptr;
326 if (reg_nr == D10V_SP_REGNUM || reg_nr == D10V_FP_REGNUM)
327 return builtin_type_void_data_ptr;
328 else if (reg_nr >= a0_regnum (gdbarch)
329 && reg_nr < (a0_regnum (gdbarch) + NR_A_REGS))
330 return builtin_type_int64;
332 return builtin_type_int16;
336 d10v_daddr_p (CORE_ADDR x)
338 return (((x) & 0x3000000) == DMEM_START);
342 d10v_iaddr_p (CORE_ADDR x)
344 return (((x) & 0x3000000) == IMEM_START);
348 d10v_make_daddr (CORE_ADDR x)
350 return ((x) | DMEM_START);
354 d10v_make_iaddr (CORE_ADDR x)
356 if (d10v_iaddr_p (x))
357 return x; /* Idempotency -- x is already in the IMEM space. */
359 return (((x) << 2) | IMEM_START);
363 d10v_convert_iaddr_to_raw (CORE_ADDR x)
365 return (((x) >> 2) & 0xffff);
369 d10v_convert_daddr_to_raw (CORE_ADDR x)
371 return ((x) & 0xffff);
375 d10v_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr)
377 /* Is it a code address? */
378 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
379 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD)
381 store_unsigned_integer (buf, TYPE_LENGTH (type),
382 d10v_convert_iaddr_to_raw (addr));
386 /* Strip off any upper segment bits. */
387 store_unsigned_integer (buf, TYPE_LENGTH (type),
388 d10v_convert_daddr_to_raw (addr));
393 d10v_pointer_to_address (struct type *type, const void *buf)
395 CORE_ADDR addr = extract_unsigned_integer (buf, TYPE_LENGTH (type));
396 /* Is it a code address? */
397 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
398 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD
399 || TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)))
400 return d10v_make_iaddr (addr);
402 return d10v_make_daddr (addr);
405 /* Don't do anything if we have an integer, this way users can type 'x
406 <addr>' w/o having gdb outsmart them. The internal gdb conversions
407 to the correct space are taken care of in the pointer_to_address
408 function. If we don't do this, 'x $fp' wouldn't work. */
410 d10v_integer_to_address (struct type *type, void *buf)
413 val = unpack_long (type, buf);
417 /* Write into appropriate registers a function return value
418 of type TYPE, given in virtual format.
420 Things always get returned in RET1_REGNUM, RET2_REGNUM, ... */
423 d10v_store_return_value (struct type *type, struct regcache *regcache,
426 /* Only char return values need to be shifted right within the first
428 if (TYPE_LENGTH (type) == 1
429 && TYPE_CODE (type) == TYPE_CODE_INT)
432 tmp[1] = *(bfd_byte *)valbuf;
433 regcache_cooked_write (regcache, RET1_REGNUM, tmp);
438 /* A structure is never more than 8 bytes long. See
439 use_struct_convention(). */
440 gdb_assert (TYPE_LENGTH (type) <= 8);
441 /* Write out most registers, stop loop before trying to write
442 out any dangling byte at the end of the buffer. */
443 for (reg = 0; (reg * 2) + 1 < TYPE_LENGTH (type); reg++)
445 regcache_cooked_write (regcache, RET1_REGNUM + reg,
446 (bfd_byte *) valbuf + reg * 2);
448 /* Write out any dangling byte at the end of the buffer. */
449 if ((reg * 2) + 1 == TYPE_LENGTH (type))
450 regcache_cooked_write_part (regcache, reg, 0, 1,
451 (bfd_byte *) valbuf + reg * 2);
455 /* Extract from an array REGBUF containing the (raw) register state
456 the address in which a function should return its structure value,
457 as a CORE_ADDR (or an expression that can be used as one). */
460 d10v_extract_struct_value_address (struct regcache *regcache)
463 regcache_cooked_read_unsigned (regcache, ARG1_REGNUM, &addr);
464 return (addr | DMEM_START);
468 check_prologue (unsigned short op)
471 if ((op & 0x7E1F) == 0x6C1F)
475 if ((op & 0x7E3F) == 0x6E1F)
479 if ((op & 0x7FE1) == 0x01E1)
491 if ((op & 0x7E1F) == 0x681E)
495 if ((op & 0x7E3F) == 0x3A1E)
502 d10v_skip_prologue (CORE_ADDR pc)
505 unsigned short op1, op2;
506 CORE_ADDR func_addr, func_end;
507 struct symtab_and_line sal;
509 /* If we have line debugging information, then the end of the */
510 /* prologue should the first assembly instruction of the first source line */
511 if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
513 sal = find_pc_line (func_addr, 0);
514 if (sal.end && sal.end < func_end)
518 if (target_read_memory (pc, (char *) &op, 4))
519 return pc; /* Can't access it -- assume no prologue. */
523 op = (unsigned long) read_memory_integer (pc, 4);
524 if ((op & 0xC0000000) == 0xC0000000)
526 /* long instruction */
527 if (((op & 0x3FFF0000) != 0x01FF0000) && /* add3 sp,sp,n */
528 ((op & 0x3F0F0000) != 0x340F0000) && /* st rn, @(offset,sp) */
529 ((op & 0x3F1F0000) != 0x350F0000)) /* st2w rn, @(offset,sp) */
534 /* short instructions */
535 if ((op & 0xC0000000) == 0x80000000)
537 op2 = (op & 0x3FFF8000) >> 15;
542 op1 = (op & 0x3FFF8000) >> 15;
545 if (check_prologue (op1))
547 if (!check_prologue (op2))
549 /* if the previous opcode was really part of the prologue */
550 /* and not just a NOP, then we want to break after both instructions */
564 struct d10v_unwind_cache
567 /* The previous frame's inner most stack address. Used as this
568 frame ID's stack_addr. */
570 /* The frame's base, optionally used by the high-level debug info. */
573 CORE_ADDR *saved_regs;
574 /* How far the SP and r11 (FP) have been offset from the start of
575 the stack frame (as defined by the previous frame's stack
584 prologue_find_regs (struct d10v_unwind_cache *info, unsigned short op,
590 if ((op & 0x7E1F) == 0x6C1F)
592 n = (op & 0x1E0) >> 5;
593 info->sp_offset -= 2;
594 info->saved_regs[n] = info->sp_offset;
599 else if ((op & 0x7E3F) == 0x6E1F)
601 n = (op & 0x1E0) >> 5;
602 info->sp_offset -= 4;
603 info->saved_regs[n] = info->sp_offset;
604 info->saved_regs[n + 1] = info->sp_offset + 2;
609 if ((op & 0x7FE1) == 0x01E1)
611 n = (op & 0x1E) >> 1;
614 info->sp_offset -= n;
621 info->uses_frame = 1;
622 info->r11_offset = info->sp_offset;
627 if ((op & 0x7E1F) == 0x6816)
629 n = (op & 0x1E0) >> 5;
630 info->saved_regs[n] = info->r11_offset;
639 if ((op & 0x7E1F) == 0x681E)
641 n = (op & 0x1E0) >> 5;
642 info->saved_regs[n] = info->sp_offset;
647 if ((op & 0x7E3F) == 0x3A1E)
649 n = (op & 0x1E0) >> 5;
650 info->saved_regs[n] = info->sp_offset;
651 info->saved_regs[n + 1] = info->sp_offset + 2;
658 /* Put here the code to store, into fi->saved_regs, the addresses of
659 the saved registers of frame described by FRAME_INFO. This
660 includes special registers such as pc and fp saved in special ways
661 in the stack frame. sp is even more special: the address we return
662 for it IS the sp for the next frame. */
664 struct d10v_unwind_cache *
665 d10v_frame_unwind_cache (struct frame_info *next_frame,
666 void **this_prologue_cache)
672 unsigned short op1, op2;
674 struct d10v_unwind_cache *info;
676 if ((*this_prologue_cache))
677 return (*this_prologue_cache);
679 info = FRAME_OBSTACK_ZALLOC (struct d10v_unwind_cache);
680 (*this_prologue_cache) = info;
681 info->saved_regs = FRAME_OBSTACK_CALLOC (NUM_REGS, CORE_ADDR);
687 info->uses_frame = 0;
688 for (pc = frame_func_unwind (next_frame);
689 pc > 0 && pc < frame_pc_unwind (next_frame);
692 op = (unsigned long) read_memory_integer (pc, 4);
693 if ((op & 0xC0000000) == 0xC0000000)
695 /* long instruction */
696 if ((op & 0x3FFF0000) == 0x01FF0000)
699 short n = op & 0xFFFF;
700 info->sp_offset += n;
702 else if ((op & 0x3F0F0000) == 0x340F0000)
704 /* st rn, @(offset,sp) */
705 short offset = op & 0xFFFF;
706 short n = (op >> 20) & 0xF;
707 info->saved_regs[n] = info->sp_offset + offset;
709 else if ((op & 0x3F1F0000) == 0x350F0000)
711 /* st2w rn, @(offset,sp) */
712 short offset = op & 0xFFFF;
713 short n = (op >> 20) & 0xF;
714 info->saved_regs[n] = info->sp_offset + offset;
715 info->saved_regs[n + 1] = info->sp_offset + offset + 2;
722 /* short instructions */
723 if ((op & 0xC0000000) == 0x80000000)
725 op2 = (op & 0x3FFF8000) >> 15;
730 op1 = (op & 0x3FFF8000) >> 15;
733 if (!prologue_find_regs (info, op1, pc)
734 || !prologue_find_regs (info, op2, pc))
739 info->size = -info->sp_offset;
741 /* Compute the frame's base, and the previous frame's SP. */
742 if (info->uses_frame)
744 /* The SP was moved to the FP. This indicates that a new frame
745 was created. Get THIS frame's FP value by unwinding it from
747 frame_unwind_unsigned_register (next_frame, D10V_FP_REGNUM, &this_base);
748 /* The FP points at the last saved register. Adjust the FP back
749 to before the first saved register giving the SP. */
750 prev_sp = this_base + info->size;
752 else if (info->saved_regs[D10V_SP_REGNUM])
754 /* The SP was saved (which is very unusual), the frame base is
755 just the PREV's frame's TOP-OF-STACK. */
756 this_base = read_memory_unsigned_integer (info->saved_regs[D10V_SP_REGNUM],
757 register_size (current_gdbarch,
763 /* Assume that the FP is this frame's SP but with that pushed
764 stack space added back. */
765 frame_unwind_unsigned_register (next_frame, D10V_SP_REGNUM, &this_base);
766 prev_sp = this_base + info->size;
769 info->base = d10v_make_daddr (this_base);
770 info->prev_sp = d10v_make_daddr (prev_sp);
772 /* Adjust all the saved registers so that they contain addresses and
774 for (i = 0; i < NUM_REGS - 1; i++)
775 if (info->saved_regs[i])
777 info->saved_regs[i] = (info->prev_sp + info->saved_regs[i]);
780 if (info->saved_regs[LR_REGNUM])
783 = read_memory_unsigned_integer (info->saved_regs[LR_REGNUM],
784 register_size (current_gdbarch, LR_REGNUM));
785 info->return_pc = d10v_make_iaddr (return_pc);
790 frame_unwind_unsigned_register (next_frame, LR_REGNUM, &return_pc);
791 info->return_pc = d10v_make_iaddr (return_pc);
794 /* The D10V_SP_REGNUM is special. Instead of the address of the SP, the
795 previous frame's SP value is saved. */
796 info->saved_regs[D10V_SP_REGNUM] = info->prev_sp;
802 d10v_print_registers_info (struct gdbarch *gdbarch, struct ui_file *file,
803 struct frame_info *frame, int regnum, int all)
805 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
808 default_print_registers_info (gdbarch, file, frame, regnum, all);
813 ULONGEST pc, psw, rpt_s, rpt_e, rpt_c;
814 frame_read_unsigned_register (frame, D10V_PC_REGNUM, &pc);
815 frame_read_unsigned_register (frame, PSW_REGNUM, &psw);
816 frame_read_unsigned_register (frame, frame_map_name_to_regnum ("rpt_s", -1), &rpt_s);
817 frame_read_unsigned_register (frame, frame_map_name_to_regnum ("rpt_e", -1), &rpt_e);
818 frame_read_unsigned_register (frame, frame_map_name_to_regnum ("rpt_c", -1), &rpt_c);
819 fprintf_filtered (file, "PC=%04lx (0x%lx) PSW=%04lx RPT_S=%04lx RPT_E=%04lx RPT_C=%04lx\n",
820 (long) pc, (long) d10v_make_iaddr (pc), (long) psw,
821 (long) rpt_s, (long) rpt_e, (long) rpt_c);
826 for (group = 0; group < 16; group += 8)
829 fprintf_filtered (file, "R%d-R%-2d", group, group + 7);
830 for (r = group; r < group + 8; r++)
833 frame_read_unsigned_register (frame, r, &tmp);
834 fprintf_filtered (file, " %04lx", (long) tmp);
836 fprintf_filtered (file, "\n");
840 /* Note: The IMAP/DMAP registers don't participate in function
841 calls. Don't bother trying to unwind them. */
845 for (a = 0; a < NR_IMAP_REGS; a++)
848 fprintf_filtered (file, " ");
849 fprintf_filtered (file, "IMAP%d %04lx", a,
850 tdep->imap_register (current_regcache, a));
852 if (nr_dmap_regs (gdbarch) == 1)
853 /* Registers DMAP0 and DMAP1 are constant. Just return dmap2. */
854 fprintf_filtered (file, " DMAP %04lx\n",
855 tdep->dmap_register (current_regcache, 2));
858 for (a = 0; a < nr_dmap_regs (gdbarch); a++)
860 fprintf_filtered (file, " DMAP%d %04lx", a,
861 tdep->dmap_register (current_regcache, a));
863 fprintf_filtered (file, "\n");
868 char num[MAX_REGISTER_SIZE];
870 fprintf_filtered (file, "A0-A%d", NR_A_REGS - 1);
871 for (a = a0_regnum (gdbarch); a < a0_regnum (gdbarch) + NR_A_REGS; a++)
874 fprintf_filtered (file, " ");
875 frame_read_register (frame, a, num);
876 for (i = 0; i < register_size (current_gdbarch, a); i++)
878 fprintf_filtered (file, "%02x", (num[i] & 0xff));
882 fprintf_filtered (file, "\n");
886 show_regs (char *args, int from_tty)
888 d10v_print_registers_info (current_gdbarch, gdb_stdout,
889 get_current_frame (), -1, 1);
893 d10v_read_pc (ptid_t ptid)
899 save_ptid = inferior_ptid;
900 inferior_ptid = ptid;
901 pc = (int) read_register (D10V_PC_REGNUM);
902 inferior_ptid = save_ptid;
903 retval = d10v_make_iaddr (pc);
908 d10v_write_pc (CORE_ADDR val, ptid_t ptid)
912 save_ptid = inferior_ptid;
913 inferior_ptid = ptid;
914 write_register (D10V_PC_REGNUM, d10v_convert_iaddr_to_raw (val));
915 inferior_ptid = save_ptid;
921 return (d10v_make_daddr (read_register (D10V_SP_REGNUM)));
924 /* When arguments must be pushed onto the stack, they go on in reverse
925 order. The below implements a FILO (stack) to do this. */
930 struct stack_item *prev;
934 static struct stack_item *push_stack_item (struct stack_item *prev,
935 void *contents, int len);
936 static struct stack_item *
937 push_stack_item (struct stack_item *prev, void *contents, int len)
939 struct stack_item *si;
940 si = xmalloc (sizeof (struct stack_item));
941 si->data = xmalloc (len);
944 memcpy (si->data, contents, len);
948 static struct stack_item *pop_stack_item (struct stack_item *si);
949 static struct stack_item *
950 pop_stack_item (struct stack_item *si)
952 struct stack_item *dead = si;
961 d10v_push_dummy_code (struct gdbarch *gdbarch,
962 CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc,
963 struct value **args, int nargs,
964 struct type *value_type,
965 CORE_ADDR *real_pc, CORE_ADDR *bp_addr)
967 /* Allocate space sufficient for a breakpoint. */
969 /* Store the address of that breakpoint taking care to first convert
970 it into a code (IADDR) address from a stack (DADDR) address.
971 This of course assumes that the two virtual addresses map onto
972 the same real address. */
973 (*bp_addr) = d10v_make_iaddr (d10v_convert_iaddr_to_raw (sp));
974 /* d10v always starts the call at the callee's entry point. */
975 (*real_pc) = funaddr;
980 d10v_push_dummy_call (struct gdbarch *gdbarch, struct regcache *regcache,
981 CORE_ADDR dummy_addr, int nargs, struct value **args,
982 CORE_ADDR sp, int struct_return, CORE_ADDR struct_addr)
985 int regnum = ARG1_REGNUM;
986 struct stack_item *si = NULL;
989 /* Set the return address. For the d10v, the return breakpoint is
990 always at DUMMY_ADDR. */
991 regcache_cooked_write_unsigned (regcache, LR_REGNUM,
992 d10v_convert_iaddr_to_raw (dummy_addr));
994 /* If STRUCT_RETURN is true, then the struct return address (in
995 STRUCT_ADDR) will consume the first argument-passing register.
996 Both adjust the register count and store that value. */
999 regcache_cooked_write_unsigned (regcache, regnum, struct_addr);
1003 /* Fill in registers and arg lists */
1004 for (i = 0; i < nargs; i++)
1006 struct value *arg = args[i];
1007 struct type *type = check_typedef (VALUE_TYPE (arg));
1008 char *contents = VALUE_CONTENTS (arg);
1009 int len = TYPE_LENGTH (type);
1010 int aligned_regnum = (regnum + 1) & ~1;
1012 /* printf ("push: type=%d len=%d\n", TYPE_CODE (type), len); */
1013 if (len <= 2 && regnum <= ARGN_REGNUM)
1014 /* fits in a single register, do not align */
1016 val = extract_unsigned_integer (contents, len);
1017 regcache_cooked_write_unsigned (regcache, regnum++, val);
1019 else if (len <= (ARGN_REGNUM - aligned_regnum + 1) * 2)
1020 /* value fits in remaining registers, store keeping left
1024 regnum = aligned_regnum;
1025 for (b = 0; b < (len & ~1); b += 2)
1027 val = extract_unsigned_integer (&contents[b], 2);
1028 regcache_cooked_write_unsigned (regcache, regnum++, val);
1032 val = extract_unsigned_integer (&contents[b], 1);
1033 regcache_cooked_write_unsigned (regcache, regnum++, (val << 8));
1038 /* arg will go onto stack */
1039 regnum = ARGN_REGNUM + 1;
1040 si = push_stack_item (si, contents, len);
1046 sp = (sp - si->len) & ~1;
1047 write_memory (sp, si->data, si->len);
1048 si = pop_stack_item (si);
1051 /* Finally, update the SP register. */
1052 regcache_cooked_write_unsigned (regcache, D10V_SP_REGNUM,
1053 d10v_convert_daddr_to_raw (sp));
1059 /* Given a return value in `regbuf' with a type `valtype',
1060 extract and copy its value into `valbuf'. */
1063 d10v_extract_return_value (struct type *type, struct regcache *regcache,
1067 if (TYPE_LENGTH (type) == 1)
1070 regcache_cooked_read_unsigned (regcache, RET1_REGNUM, &c);
1071 store_unsigned_integer (valbuf, 1, c);
1075 /* For return values of odd size, the first byte is in the
1076 least significant part of the first register. The
1077 remaining bytes in remaining registers. Interestingly, when
1078 such values are passed in, the last byte is in the most
1079 significant byte of that same register - wierd. */
1080 int reg = RET1_REGNUM;
1082 if (TYPE_LENGTH (type) & 1)
1084 regcache_cooked_read_part (regcache, RET1_REGNUM, 1, 1,
1085 (bfd_byte *)valbuf + off);
1089 /* Transfer the remaining registers. */
1090 for (; off < TYPE_LENGTH (type); reg++, off += 2)
1092 regcache_cooked_read (regcache, RET1_REGNUM + reg,
1093 (bfd_byte *) valbuf + off);
1098 /* Translate a GDB virtual ADDR/LEN into a format the remote target
1099 understands. Returns number of bytes that can be transfered
1100 starting at TARG_ADDR. Return ZERO if no bytes can be transfered
1101 (segmentation fault). Since the simulator knows all about how the
1102 VM system works, we just call that to do the translation. */
1105 remote_d10v_translate_xfer_address (struct gdbarch *gdbarch,
1106 struct regcache *regcache,
1107 CORE_ADDR memaddr, int nr_bytes,
1108 CORE_ADDR *targ_addr, int *targ_len)
1110 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1113 out_len = sim_d10v_translate_addr (memaddr, nr_bytes, &out_addr, regcache,
1114 tdep->dmap_register, tdep->imap_register);
1115 *targ_addr = out_addr;
1116 *targ_len = out_len;
1120 /* The following code implements access to, and display of, the D10V's
1121 instruction trace buffer. The buffer consists of 64K or more
1122 4-byte words of data, of which each words includes an 8-bit count,
1123 an 8-bit segment number, and a 16-bit instruction address.
1125 In theory, the trace buffer is continuously capturing instruction
1126 data that the CPU presents on its "debug bus", but in practice, the
1127 ROMified GDB stub only enables tracing when it continues or steps
1128 the program, and stops tracing when the program stops; so it
1129 actually works for GDB to read the buffer counter out of memory and
1130 then read each trace word. The counter records where the tracing
1131 stops, but there is no record of where it started, so we remember
1132 the PC when we resumed and then search backwards in the trace
1133 buffer for a word that includes that address. This is not perfect,
1134 because you will miss trace data if the resumption PC is the target
1135 of a branch. (The value of the buffer counter is semi-random, any
1136 trace data from a previous program stop is gone.) */
1138 /* The address of the last word recorded in the trace buffer. */
1140 #define DBBC_ADDR (0xd80000)
1142 /* The base of the trace buffer, at least for the "Board_0". */
1144 #define TRACE_BUFFER_BASE (0xf40000)
1146 static void trace_command (char *, int);
1148 static void untrace_command (char *, int);
1150 static void trace_info (char *, int);
1152 static void tdisassemble_command (char *, int);
1154 static void display_trace (int, int);
1156 /* True when instruction traces are being collected. */
1160 /* Remembered PC. */
1162 static CORE_ADDR last_pc;
1164 /* True when trace output should be displayed whenever program stops. */
1166 static int trace_display;
1168 /* True when trace listing should include source lines. */
1170 static int default_trace_show_source = 1;
1181 trace_command (char *args, int from_tty)
1183 /* Clear the host-side trace buffer, allocating space if needed. */
1184 trace_data.size = 0;
1185 if (trace_data.counts == NULL)
1186 trace_data.counts = XCALLOC (65536, short);
1187 if (trace_data.addrs == NULL)
1188 trace_data.addrs = XCALLOC (65536, CORE_ADDR);
1192 printf_filtered ("Tracing is now on.\n");
1196 untrace_command (char *args, int from_tty)
1200 printf_filtered ("Tracing is now off.\n");
1204 trace_info (char *args, int from_tty)
1208 if (trace_data.size)
1210 printf_filtered ("%d entries in trace buffer:\n", trace_data.size);
1212 for (i = 0; i < trace_data.size; ++i)
1214 printf_filtered ("%d: %d instruction%s at 0x%s\n",
1216 trace_data.counts[i],
1217 (trace_data.counts[i] == 1 ? "" : "s"),
1218 paddr_nz (trace_data.addrs[i]));
1222 printf_filtered ("No entries in trace buffer.\n");
1224 printf_filtered ("Tracing is currently %s.\n", (tracing ? "on" : "off"));
1228 d10v_eva_prepare_to_trace (void)
1233 last_pc = read_register (D10V_PC_REGNUM);
1236 /* Collect trace data from the target board and format it into a form
1237 more useful for display. */
1240 d10v_eva_get_trace_data (void)
1242 int count, i, j, oldsize;
1243 int trace_addr, trace_seg, trace_cnt, next_cnt;
1244 unsigned int last_trace, trace_word, next_word;
1245 unsigned int *tmpspace;
1250 tmpspace = xmalloc (65536 * sizeof (unsigned int));
1252 last_trace = read_memory_unsigned_integer (DBBC_ADDR, 2) << 2;
1254 /* Collect buffer contents from the target, stopping when we reach
1255 the word recorded when execution resumed. */
1258 while (last_trace > 0)
1262 read_memory_unsigned_integer (TRACE_BUFFER_BASE + last_trace, 4);
1263 trace_addr = trace_word & 0xffff;
1265 /* Ignore an apparently nonsensical entry. */
1266 if (trace_addr == 0xffd5)
1268 tmpspace[count++] = trace_word;
1269 if (trace_addr == last_pc)
1275 /* Move the data to the host-side trace buffer, adjusting counts to
1276 include the last instruction executed and transforming the address
1277 into something that GDB likes. */
1279 for (i = 0; i < count; ++i)
1281 trace_word = tmpspace[i];
1282 next_word = ((i == 0) ? 0 : tmpspace[i - 1]);
1283 trace_addr = trace_word & 0xffff;
1284 next_cnt = (next_word >> 24) & 0xff;
1285 j = trace_data.size + count - i - 1;
1286 trace_data.addrs[j] = (trace_addr << 2) + 0x1000000;
1287 trace_data.counts[j] = next_cnt + 1;
1290 oldsize = trace_data.size;
1291 trace_data.size += count;
1296 display_trace (oldsize, trace_data.size);
1300 tdisassemble_command (char *arg, int from_tty)
1303 CORE_ADDR low, high;
1308 high = trace_data.size;
1312 char *space_index = strchr (arg, ' ');
1313 if (space_index == NULL)
1315 low = parse_and_eval_address (arg);
1320 /* Two arguments. */
1321 *space_index = '\0';
1322 low = parse_and_eval_address (arg);
1323 high = parse_and_eval_address (space_index + 1);
1329 printf_filtered ("Dump of trace from %s to %s:\n", paddr_u (low), paddr_u (high));
1331 display_trace (low, high);
1333 printf_filtered ("End of trace dump.\n");
1334 gdb_flush (gdb_stdout);
1338 display_trace (int low, int high)
1340 int i, count, trace_show_source, first, suppress;
1341 CORE_ADDR next_address;
1343 trace_show_source = default_trace_show_source;
1344 if (!have_full_symbols () && !have_partial_symbols ())
1346 trace_show_source = 0;
1347 printf_filtered ("No symbol table is loaded. Use the \"file\" command.\n");
1348 printf_filtered ("Trace will not display any source.\n");
1353 for (i = low; i < high; ++i)
1355 next_address = trace_data.addrs[i];
1356 count = trace_data.counts[i];
1360 if (trace_show_source)
1362 struct symtab_and_line sal, sal_prev;
1364 sal_prev = find_pc_line (next_address - 4, 0);
1365 sal = find_pc_line (next_address, 0);
1369 if (first || sal.line != sal_prev.line)
1370 print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
1376 /* FIXME-32x64--assumes sal.pc fits in long. */
1377 printf_filtered ("No source file for address %s.\n",
1378 local_hex_string ((unsigned long) sal.pc));
1383 print_address (next_address, gdb_stdout);
1384 printf_filtered (":");
1385 printf_filtered ("\t");
1387 next_address += gdb_print_insn (next_address, gdb_stdout);
1388 printf_filtered ("\n");
1389 gdb_flush (gdb_stdout);
1395 d10v_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
1398 frame_unwind_unsigned_register (next_frame, D10V_PC_REGNUM, &pc);
1399 return d10v_make_iaddr (pc);
1402 /* Given a GDB frame, determine the address of the calling function's
1403 frame. This will be used to create a new GDB frame struct. */
1406 d10v_frame_this_id (struct frame_info *next_frame,
1407 void **this_prologue_cache,
1408 struct frame_id *this_id)
1410 struct d10v_unwind_cache *info
1411 = d10v_frame_unwind_cache (next_frame, this_prologue_cache);
1416 /* The FUNC is easy. */
1417 func = frame_func_unwind (next_frame);
1419 /* This is meant to halt the backtrace at "_start". Make sure we
1420 don't halt it at a generic dummy frame. */
1421 if (func <= IMEM_START || inside_entry_file (func))
1424 /* Hopefully the prologue analysis either correctly determined the
1425 frame's base (which is the SP from the previous frame), or set
1426 that base to "NULL". */
1427 base = info->prev_sp;
1428 if (base == STACK_START || base == 0)
1431 id = frame_id_build (base, func);
1433 /* Check that we're not going round in circles with the same frame
1434 ID (but avoid applying the test to sentinel frames which do go
1435 round in circles). Can't use frame_id_eq() as that doesn't yet
1436 compare the frame's PC value. */
1437 if (frame_relative_level (next_frame) >= 0
1438 && get_frame_type (next_frame) != DUMMY_FRAME
1439 && frame_id_eq (get_frame_id (next_frame), id))
1446 saved_regs_unwinder (struct frame_info *next_frame,
1447 CORE_ADDR *this_saved_regs,
1448 int regnum, int *optimizedp,
1449 enum lval_type *lvalp, CORE_ADDR *addrp,
1450 int *realnump, void *bufferp)
1452 if (this_saved_regs[regnum] != 0)
1454 if (regnum == D10V_SP_REGNUM)
1456 /* SP register treated specially. */
1461 if (bufferp != NULL)
1462 store_unsigned_integer (bufferp,
1463 register_size (current_gdbarch, regnum),
1464 this_saved_regs[regnum]);
1468 /* Any other register is saved in memory, fetch it but cache
1469 a local copy of its value. */
1471 *lvalp = lval_memory;
1472 *addrp = this_saved_regs[regnum];
1474 if (bufferp != NULL)
1476 /* Read the value in from memory. */
1477 read_memory (this_saved_regs[regnum], bufferp,
1478 register_size (current_gdbarch, regnum));
1484 /* No luck, assume this and the next frame have the same register
1485 value. If a value is needed, pass the request on down the chain;
1486 otherwise just return an indication that the value is in the same
1487 register as the next frame. */
1488 frame_register_unwind (next_frame, regnum, optimizedp, lvalp, addrp,
1494 d10v_frame_prev_register (struct frame_info *next_frame,
1495 void **this_prologue_cache,
1496 int regnum, int *optimizedp,
1497 enum lval_type *lvalp, CORE_ADDR *addrp,
1498 int *realnump, void *bufferp)
1500 struct d10v_unwind_cache *info
1501 = d10v_frame_unwind_cache (next_frame, this_prologue_cache);
1502 if (regnum == D10V_PC_REGNUM)
1504 /* The call instruction saves the caller's PC in LR. The
1505 function prologue of the callee may then save the LR on the
1506 stack. Find that possibly saved LR value and return it. */
1507 saved_regs_unwinder (next_frame, info->saved_regs, LR_REGNUM, optimizedp,
1508 lvalp, addrp, realnump, bufferp);
1512 saved_regs_unwinder (next_frame, info->saved_regs, regnum, optimizedp,
1513 lvalp, addrp, realnump, bufferp);
1517 static const struct frame_unwind d10v_frame_unwind = {
1520 d10v_frame_prev_register
1523 const struct frame_unwind *
1524 d10v_frame_p (CORE_ADDR pc)
1526 return &d10v_frame_unwind;
1530 d10v_frame_base_address (struct frame_info *next_frame, void **this_cache)
1532 struct d10v_unwind_cache *info
1533 = d10v_frame_unwind_cache (next_frame, this_cache);
1537 static const struct frame_base d10v_frame_base = {
1539 d10v_frame_base_address,
1540 d10v_frame_base_address,
1541 d10v_frame_base_address
1544 /* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that
1545 dummy frame. The frame ID's base needs to match the TOS value
1546 saved by save_dummy_frame_tos(), and the PC match the dummy frame's
1549 static struct frame_id
1550 d10v_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
1553 frame_unwind_unsigned_register (next_frame, D10V_SP_REGNUM, &base);
1554 return frame_id_build (d10v_make_daddr (base), frame_pc_unwind (next_frame));
1557 static gdbarch_init_ftype d10v_gdbarch_init;
1559 static struct gdbarch *
1560 d10v_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1562 struct gdbarch *gdbarch;
1564 struct gdbarch_tdep *tdep;
1565 gdbarch_register_name_ftype *d10v_register_name;
1566 gdbarch_register_sim_regno_ftype *d10v_register_sim_regno;
1568 /* Find a candidate among the list of pre-declared architectures. */
1569 arches = gdbarch_list_lookup_by_info (arches, &info);
1571 return arches->gdbarch;
1573 /* None found, create a new architecture from the information
1575 tdep = XMALLOC (struct gdbarch_tdep);
1576 gdbarch = gdbarch_alloc (&info, tdep);
1578 switch (info.bfd_arch_info->mach)
1580 case bfd_mach_d10v_ts2:
1582 d10v_register_name = d10v_ts2_register_name;
1583 d10v_register_sim_regno = d10v_ts2_register_sim_regno;
1584 tdep->a0_regnum = TS2_A0_REGNUM;
1585 tdep->nr_dmap_regs = TS2_NR_DMAP_REGS;
1586 tdep->dmap_register = d10v_ts2_dmap_register;
1587 tdep->imap_register = d10v_ts2_imap_register;
1590 case bfd_mach_d10v_ts3:
1592 d10v_register_name = d10v_ts3_register_name;
1593 d10v_register_sim_regno = d10v_ts3_register_sim_regno;
1594 tdep->a0_regnum = TS3_A0_REGNUM;
1595 tdep->nr_dmap_regs = TS3_NR_DMAP_REGS;
1596 tdep->dmap_register = d10v_ts3_dmap_register;
1597 tdep->imap_register = d10v_ts3_imap_register;
1601 set_gdbarch_read_pc (gdbarch, d10v_read_pc);
1602 set_gdbarch_write_pc (gdbarch, d10v_write_pc);
1603 set_gdbarch_read_sp (gdbarch, d10v_read_sp);
1605 set_gdbarch_num_regs (gdbarch, d10v_num_regs);
1606 set_gdbarch_sp_regnum (gdbarch, D10V_SP_REGNUM);
1607 set_gdbarch_register_name (gdbarch, d10v_register_name);
1608 set_gdbarch_register_type (gdbarch, d10v_register_type);
1610 set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT);
1611 set_gdbarch_addr_bit (gdbarch, 32);
1612 set_gdbarch_address_to_pointer (gdbarch, d10v_address_to_pointer);
1613 set_gdbarch_pointer_to_address (gdbarch, d10v_pointer_to_address);
1614 set_gdbarch_integer_to_address (gdbarch, d10v_integer_to_address);
1615 set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
1616 set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT);
1617 set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
1618 set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
1619 /* NOTE: The d10v as a 32 bit ``float'' and ``double''. ``long
1620 double'' is 64 bits. */
1621 set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
1622 set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT);
1623 set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
1624 switch (info.byte_order)
1626 case BFD_ENDIAN_BIG:
1627 set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_big);
1628 set_gdbarch_double_format (gdbarch, &floatformat_ieee_single_big);
1629 set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
1631 case BFD_ENDIAN_LITTLE:
1632 set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_little);
1633 set_gdbarch_double_format (gdbarch, &floatformat_ieee_single_little);
1634 set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_little);
1637 internal_error (__FILE__, __LINE__,
1638 "d10v_gdbarch_init: bad byte order for float format");
1641 set_gdbarch_extract_return_value (gdbarch, d10v_extract_return_value);
1642 set_gdbarch_push_dummy_code (gdbarch, d10v_push_dummy_code);
1643 set_gdbarch_push_dummy_call (gdbarch, d10v_push_dummy_call);
1644 set_gdbarch_store_return_value (gdbarch, d10v_store_return_value);
1645 set_gdbarch_extract_struct_value_address (gdbarch, d10v_extract_struct_value_address);
1646 set_gdbarch_use_struct_convention (gdbarch, d10v_use_struct_convention);
1648 set_gdbarch_skip_prologue (gdbarch, d10v_skip_prologue);
1649 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1650 set_gdbarch_decr_pc_after_break (gdbarch, 4);
1651 set_gdbarch_function_start_offset (gdbarch, 0);
1652 set_gdbarch_breakpoint_from_pc (gdbarch, d10v_breakpoint_from_pc);
1654 set_gdbarch_remote_translate_xfer_address (gdbarch, remote_d10v_translate_xfer_address);
1656 set_gdbarch_frame_args_skip (gdbarch, 0);
1657 set_gdbarch_frameless_function_invocation (gdbarch, frameless_look_for_prologue);
1659 set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
1660 set_gdbarch_frame_align (gdbarch, d10v_frame_align);
1662 set_gdbarch_register_sim_regno (gdbarch, d10v_register_sim_regno);
1664 set_gdbarch_print_registers_info (gdbarch, d10v_print_registers_info);
1666 frame_unwind_append_predicate (gdbarch, d10v_frame_p);
1667 frame_base_set_default (gdbarch, &d10v_frame_base);
1669 /* Methods for saving / extracting a dummy frame's ID. */
1670 set_gdbarch_unwind_dummy_id (gdbarch, d10v_unwind_dummy_id);
1671 set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
1673 /* Return the unwound PC value. */
1674 set_gdbarch_unwind_pc (gdbarch, d10v_unwind_pc);
1676 set_gdbarch_print_insn (gdbarch, print_insn_d10v);
1682 _initialize_d10v_tdep (void)
1684 register_gdbarch_init (bfd_arch_d10v, d10v_gdbarch_init);
1686 target_resume_hook = d10v_eva_prepare_to_trace;
1687 target_wait_loop_hook = d10v_eva_get_trace_data;
1689 deprecate_cmd (add_com ("regs", class_vars, show_regs, "Print all registers"),
1692 add_com ("itrace", class_support, trace_command,
1693 "Enable tracing of instruction execution.");
1695 add_com ("iuntrace", class_support, untrace_command,
1696 "Disable tracing of instruction execution.");
1698 add_com ("itdisassemble", class_vars, tdisassemble_command,
1699 "Disassemble the trace buffer.\n\
1700 Two optional arguments specify a range of trace buffer entries\n\
1701 as reported by info trace (NOT addresses!).");
1703 add_info ("itrace", trace_info,
1704 "Display info about the trace data buffer.");
1706 add_setshow_boolean_cmd ("itracedisplay", no_class, &trace_display,
1707 "Set automatic display of trace.\n",
1708 "Show automatic display of trace.\n",
1709 NULL, NULL, &setlist, &showlist);
1710 add_setshow_boolean_cmd ("itracesource", no_class,
1711 &default_trace_show_source,
1712 "Set display of source code with trace.\n",
1713 "Show display of source code with trace.\n",
1714 NULL, NULL, &setlist, &showlist);