1 /* Target-dependent code for Mitsubishi D10V, for GDB.
3 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 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. */
23 /* Contributed by Martin Hunt, hunt@cygnus.com */
31 #include "gdb_string.h"
38 #include "arch-utils.h"
41 #include "floatformat.h"
42 #include "gdb/sim-d10v.h"
43 #include "sim-regno.h"
45 struct frame_extra_info
56 unsigned long (*dmap_register) (int nr);
57 unsigned long (*imap_register) (int nr);
60 /* These are the addresses the D10V-EVA board maps data and
61 instruction memory to. */
64 DMEM_START = 0x2000000,
65 IMEM_START = 0x1000000,
66 STACK_START = 0x200bffe
69 /* d10v register names. */
84 /* d10v calling convention. */
85 ARG1_REGNUM = R0_REGNUM,
86 ARGN_REGNUM = R3_REGNUM,
87 RET1_REGNUM = R0_REGNUM,
90 #define NR_DMAP_REGS (gdbarch_tdep (current_gdbarch)->nr_dmap_regs)
91 #define A0_REGNUM (gdbarch_tdep (current_gdbarch)->a0_regnum)
95 extern void _initialize_d10v_tdep (void);
97 static CORE_ADDR d10v_read_sp (void);
99 static CORE_ADDR d10v_read_fp (void);
101 static void d10v_eva_prepare_to_trace (void);
103 static void d10v_eva_get_trace_data (void);
105 static int prologue_find_regs (unsigned short op, struct frame_info *fi,
108 static void d10v_frame_init_saved_regs (struct frame_info *);
110 static void do_d10v_pop_frame (struct frame_info *fi);
113 d10v_frame_chain_valid (CORE_ADDR chain, struct frame_info *frame)
115 if (chain != 0 && frame != NULL)
117 if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
118 return 1; /* Path back from a call dummy must be valid. */
119 return ((frame)->pc > IMEM_START
120 && !inside_main_func (frame->pc));
126 d10v_stack_align (CORE_ADDR len)
128 return (len + 1) & ~1;
131 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
132 EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
133 and TYPE is the type (which is known to be struct, union or array).
135 The d10v returns anything less than 8 bytes in size in
139 d10v_use_struct_convention (int gcc_p, struct type *type)
143 /* The d10v only passes a struct in a register when that structure
144 has an alignment that matches the size of a register. */
145 /* If the structure doesn't fit in 4 registers, put it on the
147 if (TYPE_LENGTH (type) > 8)
149 /* If the struct contains only one field, don't put it on the stack
150 - gcc can fit it in one or more registers. */
151 if (TYPE_NFIELDS (type) == 1)
153 alignment = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
154 for (i = 1; i < TYPE_NFIELDS (type); i++)
156 /* If the alignment changes, just assume it goes on the
158 if (TYPE_LENGTH (TYPE_FIELD_TYPE (type, i)) != alignment)
161 /* If the alignment is suitable for the d10v's 16 bit registers,
162 don't put it on the stack. */
163 if (alignment == 2 || alignment == 4)
169 static const unsigned char *
170 d10v_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
172 static unsigned char breakpoint[] =
173 {0x2f, 0x90, 0x5e, 0x00};
174 *lenptr = sizeof (breakpoint);
178 /* Map the REG_NR onto an ascii name. Return NULL or an empty string
179 when the reg_nr isn't valid. */
183 TS2_IMAP0_REGNUM = 32,
184 TS2_DMAP_REGNUM = 34,
185 TS2_NR_DMAP_REGS = 1,
190 d10v_ts2_register_name (int reg_nr)
192 static char *register_names[] =
194 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
195 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
196 "psw", "bpsw", "pc", "bpc", "cr4", "cr5", "cr6", "rpt_c",
197 "rpt_s", "rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",
198 "imap0", "imap1", "dmap", "a0", "a1"
202 if (reg_nr >= (sizeof (register_names) / sizeof (*register_names)))
204 return register_names[reg_nr];
209 TS3_IMAP0_REGNUM = 36,
210 TS3_DMAP0_REGNUM = 38,
211 TS3_NR_DMAP_REGS = 4,
216 d10v_ts3_register_name (int reg_nr)
218 static char *register_names[] =
220 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
221 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
222 "psw", "bpsw", "pc", "bpc", "cr4", "cr5", "cr6", "rpt_c",
223 "rpt_s", "rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",
227 "dmap0", "dmap1", "dmap2", "dmap3"
231 if (reg_nr >= (sizeof (register_names) / sizeof (*register_names)))
233 return register_names[reg_nr];
236 /* Access the DMAP/IMAP registers in a target independent way.
238 Divide the D10V's 64k data space into four 16k segments:
239 0x0000 -- 0x3fff, 0x4000 -- 0x7fff, 0x8000 -- 0xbfff, and
242 On the TS2, the first two segments (0x0000 -- 0x3fff, 0x4000 --
243 0x7fff) always map to the on-chip data RAM, and the fourth always
244 maps to I/O space. The third (0x8000 - 0xbfff) can be mapped into
245 unified memory or instruction memory, under the control of the
246 single DMAP register.
248 On the TS3, there are four DMAP registers, each of which controls
249 one of the segments. */
252 d10v_ts2_dmap_register (int reg_nr)
260 return read_register (TS2_DMAP_REGNUM);
267 d10v_ts3_dmap_register (int reg_nr)
269 return read_register (TS3_DMAP0_REGNUM + reg_nr);
273 d10v_dmap_register (int reg_nr)
275 return gdbarch_tdep (current_gdbarch)->dmap_register (reg_nr);
279 d10v_ts2_imap_register (int reg_nr)
281 return read_register (TS2_IMAP0_REGNUM + reg_nr);
285 d10v_ts3_imap_register (int reg_nr)
287 return read_register (TS3_IMAP0_REGNUM + reg_nr);
291 d10v_imap_register (int reg_nr)
293 return gdbarch_tdep (current_gdbarch)->imap_register (reg_nr);
296 /* MAP GDB's internal register numbering (determined by the layout fo
297 the REGISTER_BYTE array) onto the simulator's register
301 d10v_ts2_register_sim_regno (int nr)
303 if (legacy_register_sim_regno (nr) < 0)
304 return legacy_register_sim_regno (nr);
305 if (nr >= TS2_IMAP0_REGNUM
306 && nr < TS2_IMAP0_REGNUM + NR_IMAP_REGS)
307 return nr - TS2_IMAP0_REGNUM + SIM_D10V_IMAP0_REGNUM;
308 if (nr == TS2_DMAP_REGNUM)
309 return nr - TS2_DMAP_REGNUM + SIM_D10V_TS2_DMAP_REGNUM;
310 if (nr >= TS2_A0_REGNUM
311 && nr < TS2_A0_REGNUM + NR_A_REGS)
312 return nr - TS2_A0_REGNUM + SIM_D10V_A0_REGNUM;
317 d10v_ts3_register_sim_regno (int nr)
319 if (legacy_register_sim_regno (nr) < 0)
320 return legacy_register_sim_regno (nr);
321 if (nr >= TS3_IMAP0_REGNUM
322 && nr < TS3_IMAP0_REGNUM + NR_IMAP_REGS)
323 return nr - TS3_IMAP0_REGNUM + SIM_D10V_IMAP0_REGNUM;
324 if (nr >= TS3_DMAP0_REGNUM
325 && nr < TS3_DMAP0_REGNUM + TS3_NR_DMAP_REGS)
326 return nr - TS3_DMAP0_REGNUM + SIM_D10V_DMAP0_REGNUM;
327 if (nr >= TS3_A0_REGNUM
328 && nr < TS3_A0_REGNUM + NR_A_REGS)
329 return nr - TS3_A0_REGNUM + SIM_D10V_A0_REGNUM;
333 /* Index within `registers' of the first byte of the space for
337 d10v_register_byte (int reg_nr)
339 if (reg_nr < A0_REGNUM)
341 else if (reg_nr < (A0_REGNUM + NR_A_REGS))
342 return (A0_REGNUM * 2
343 + (reg_nr - A0_REGNUM) * 8);
345 return (A0_REGNUM * 2
347 + (reg_nr - A0_REGNUM - NR_A_REGS) * 2);
350 /* Number of bytes of storage in the actual machine representation for
354 d10v_register_raw_size (int reg_nr)
356 if (reg_nr < A0_REGNUM)
358 else if (reg_nr < (A0_REGNUM + NR_A_REGS))
364 /* Return the GDB type object for the "standard" data type
365 of data in register N. */
368 d10v_register_virtual_type (int reg_nr)
370 if (reg_nr == PC_REGNUM)
371 return builtin_type_void_func_ptr;
372 if (reg_nr == _SP_REGNUM || reg_nr == _FP_REGNUM)
373 return builtin_type_void_data_ptr;
374 else if (reg_nr >= A0_REGNUM
375 && reg_nr < (A0_REGNUM + NR_A_REGS))
376 return builtin_type_int64;
378 return builtin_type_int16;
382 d10v_daddr_p (CORE_ADDR x)
384 return (((x) & 0x3000000) == DMEM_START);
388 d10v_iaddr_p (CORE_ADDR x)
390 return (((x) & 0x3000000) == IMEM_START);
394 d10v_make_daddr (CORE_ADDR x)
396 return ((x) | DMEM_START);
400 d10v_make_iaddr (CORE_ADDR x)
402 if (d10v_iaddr_p (x))
403 return x; /* Idempotency -- x is already in the IMEM space. */
405 return (((x) << 2) | IMEM_START);
409 d10v_convert_iaddr_to_raw (CORE_ADDR x)
411 return (((x) >> 2) & 0xffff);
415 d10v_convert_daddr_to_raw (CORE_ADDR x)
417 return ((x) & 0xffff);
421 d10v_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr)
423 /* Is it a code address? */
424 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
425 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD)
427 store_unsigned_integer (buf, TYPE_LENGTH (type),
428 d10v_convert_iaddr_to_raw (addr));
432 /* Strip off any upper segment bits. */
433 store_unsigned_integer (buf, TYPE_LENGTH (type),
434 d10v_convert_daddr_to_raw (addr));
439 d10v_pointer_to_address (struct type *type, void *buf)
441 CORE_ADDR addr = extract_address (buf, TYPE_LENGTH (type));
443 /* Is it a code address? */
444 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC
445 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD
446 || TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)))
447 return d10v_make_iaddr (addr);
449 return d10v_make_daddr (addr);
452 /* Don't do anything if we have an integer, this way users can type 'x
453 <addr>' w/o having gdb outsmart them. The internal gdb conversions
454 to the correct space are taken care of in the pointer_to_address
455 function. If we don't do this, 'x $fp' wouldn't work. */
457 d10v_integer_to_address (struct type *type, void *buf)
460 val = unpack_long (type, buf);
464 /* Store the address of the place in which to copy the structure the
465 subroutine will return. This is called from call_function.
467 We store structs through a pointer passed in the first Argument
471 d10v_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
473 write_register (ARG1_REGNUM, (addr));
476 /* Write into appropriate registers a function return value
477 of type TYPE, given in virtual format.
479 Things always get returned in RET1_REGNUM, RET2_REGNUM, ... */
482 d10v_store_return_value (struct type *type, char *valbuf)
485 /* Only char return values need to be shifted right within R0. */
486 if (TYPE_LENGTH (type) == 1
487 && TYPE_CODE (type) == TYPE_CODE_INT)
489 write_register_bytes (REGISTER_BYTE (RET1_REGNUM),
490 &tmp, 1); /* zero the high byte */
491 write_register_bytes (REGISTER_BYTE (RET1_REGNUM) + 1,
492 valbuf, 1); /* copy the low byte */
495 write_register_bytes (REGISTER_BYTE (RET1_REGNUM),
500 /* Extract from an array REGBUF containing the (raw) register state
501 the address in which a function should return its structure value,
502 as a CORE_ADDR (or an expression that can be used as one). */
505 d10v_extract_struct_value_address (char *regbuf)
507 return (extract_address ((regbuf) + REGISTER_BYTE (ARG1_REGNUM),
508 REGISTER_RAW_SIZE (ARG1_REGNUM))
513 d10v_frame_saved_pc (struct frame_info *frame)
515 if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
516 return d10v_make_iaddr (generic_read_register_dummy (frame->pc,
520 return ((frame)->extra_info->return_pc);
523 /* Immediately after a function call, return the saved pc. We can't
524 use frame->return_pc beause that is determined by reading R13 off
525 the stack and that may not be written yet. */
528 d10v_saved_pc_after_call (struct frame_info *frame)
530 return ((read_register (LR_REGNUM) << 2)
534 /* Discard from the stack the innermost frame, restoring all saved
538 d10v_pop_frame (void)
540 generic_pop_current_frame (do_d10v_pop_frame);
544 do_d10v_pop_frame (struct frame_info *fi)
551 /* fill out fsr with the address of where each */
552 /* register was stored in the frame */
553 d10v_frame_init_saved_regs (fi);
555 /* now update the current registers with the old values */
556 for (regnum = A0_REGNUM; regnum < A0_REGNUM + NR_A_REGS; regnum++)
558 if (fi->saved_regs[regnum])
560 read_memory (fi->saved_regs[regnum], raw_buffer, REGISTER_RAW_SIZE (regnum));
561 write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, REGISTER_RAW_SIZE (regnum));
564 for (regnum = 0; regnum < SP_REGNUM; regnum++)
566 if (fi->saved_regs[regnum])
568 write_register (regnum, read_memory_unsigned_integer (fi->saved_regs[regnum], REGISTER_RAW_SIZE (regnum)));
571 if (fi->saved_regs[PSW_REGNUM])
573 write_register (PSW_REGNUM, read_memory_unsigned_integer (fi->saved_regs[PSW_REGNUM], REGISTER_RAW_SIZE (PSW_REGNUM)));
576 write_register (PC_REGNUM, read_register (LR_REGNUM));
577 write_register (SP_REGNUM, fp + fi->extra_info->size);
578 target_store_registers (-1);
579 flush_cached_frames ();
583 check_prologue (unsigned short op)
586 if ((op & 0x7E1F) == 0x6C1F)
590 if ((op & 0x7E3F) == 0x6E1F)
594 if ((op & 0x7FE1) == 0x01E1)
606 if ((op & 0x7E1F) == 0x681E)
610 if ((op & 0x7E3F) == 0x3A1E)
617 d10v_skip_prologue (CORE_ADDR pc)
620 unsigned short op1, op2;
621 CORE_ADDR func_addr, func_end;
622 struct symtab_and_line sal;
624 /* If we have line debugging information, then the end of the */
625 /* prologue should the first assembly instruction of the first source line */
626 if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
628 sal = find_pc_line (func_addr, 0);
629 if (sal.end && sal.end < func_end)
633 if (target_read_memory (pc, (char *) &op, 4))
634 return pc; /* Can't access it -- assume no prologue. */
638 op = (unsigned long) read_memory_integer (pc, 4);
639 if ((op & 0xC0000000) == 0xC0000000)
641 /* long instruction */
642 if (((op & 0x3FFF0000) != 0x01FF0000) && /* add3 sp,sp,n */
643 ((op & 0x3F0F0000) != 0x340F0000) && /* st rn, @(offset,sp) */
644 ((op & 0x3F1F0000) != 0x350F0000)) /* st2w rn, @(offset,sp) */
649 /* short instructions */
650 if ((op & 0xC0000000) == 0x80000000)
652 op2 = (op & 0x3FFF8000) >> 15;
657 op1 = (op & 0x3FFF8000) >> 15;
660 if (check_prologue (op1))
662 if (!check_prologue (op2))
664 /* if the previous opcode was really part of the prologue */
665 /* and not just a NOP, then we want to break after both instructions */
679 /* Given a GDB frame, determine the address of the calling function's frame.
680 This will be used to create a new GDB frame struct, and then
681 INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
685 d10v_frame_chain (struct frame_info *fi)
689 /* A generic call dummy's frame is the same as caller's. */
690 if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
693 d10v_frame_init_saved_regs (fi);
696 if (fi->extra_info->return_pc == IMEM_START
697 || inside_entry_file (fi->extra_info->return_pc))
699 /* This is meant to halt the backtrace at "_start".
700 Make sure we don't halt it at a generic dummy frame. */
701 if (!PC_IN_CALL_DUMMY (fi->extra_info->return_pc, 0, 0))
702 return (CORE_ADDR) 0;
705 if (!fi->saved_regs[FP_REGNUM])
707 if (!fi->saved_regs[SP_REGNUM]
708 || fi->saved_regs[SP_REGNUM] == STACK_START)
709 return (CORE_ADDR) 0;
711 return fi->saved_regs[SP_REGNUM];
714 addr = read_memory_unsigned_integer (fi->saved_regs[FP_REGNUM],
715 REGISTER_RAW_SIZE (FP_REGNUM));
717 return (CORE_ADDR) 0;
719 return d10v_make_daddr (addr);
722 static int next_addr, uses_frame;
725 prologue_find_regs (unsigned short op, struct frame_info *fi, CORE_ADDR addr)
730 if ((op & 0x7E1F) == 0x6C1F)
732 n = (op & 0x1E0) >> 5;
734 fi->saved_regs[n] = next_addr;
739 else if ((op & 0x7E3F) == 0x6E1F)
741 n = (op & 0x1E0) >> 5;
743 fi->saved_regs[n] = next_addr;
744 fi->saved_regs[n + 1] = next_addr + 2;
749 if ((op & 0x7FE1) == 0x01E1)
751 n = (op & 0x1E) >> 1;
770 if ((op & 0x7E1F) == 0x681E)
772 n = (op & 0x1E0) >> 5;
773 fi->saved_regs[n] = next_addr;
778 if ((op & 0x7E3F) == 0x3A1E)
780 n = (op & 0x1E0) >> 5;
781 fi->saved_regs[n] = next_addr;
782 fi->saved_regs[n + 1] = next_addr + 2;
789 /* Put here the code to store, into fi->saved_regs, the addresses of
790 the saved registers of frame described by FRAME_INFO. This
791 includes special registers such as pc and fp saved in special ways
792 in the stack frame. sp is even more special: the address we return
793 for it IS the sp for the next frame. */
796 d10v_frame_init_saved_regs (struct frame_info *fi)
800 unsigned short op1, op2;
804 memset (fi->saved_regs, 0, SIZEOF_FRAME_SAVED_REGS);
807 pc = get_pc_function_start (fi->pc);
812 op = (unsigned long) read_memory_integer (pc, 4);
813 if ((op & 0xC0000000) == 0xC0000000)
815 /* long instruction */
816 if ((op & 0x3FFF0000) == 0x01FF0000)
819 short n = op & 0xFFFF;
822 else if ((op & 0x3F0F0000) == 0x340F0000)
824 /* st rn, @(offset,sp) */
825 short offset = op & 0xFFFF;
826 short n = (op >> 20) & 0xF;
827 fi->saved_regs[n] = next_addr + offset;
829 else if ((op & 0x3F1F0000) == 0x350F0000)
831 /* st2w rn, @(offset,sp) */
832 short offset = op & 0xFFFF;
833 short n = (op >> 20) & 0xF;
834 fi->saved_regs[n] = next_addr + offset;
835 fi->saved_regs[n + 1] = next_addr + offset + 2;
842 /* short instructions */
843 if ((op & 0xC0000000) == 0x80000000)
845 op2 = (op & 0x3FFF8000) >> 15;
850 op1 = (op & 0x3FFF8000) >> 15;
853 if (!prologue_find_regs (op1, fi, pc)
854 || !prologue_find_regs (op2, fi, pc))
860 fi->extra_info->size = -next_addr;
863 fp = d10v_read_sp ();
865 for (i = 0; i < NUM_REGS - 1; i++)
866 if (fi->saved_regs[i])
868 fi->saved_regs[i] = fp - (next_addr - fi->saved_regs[i]);
871 if (fi->saved_regs[LR_REGNUM])
874 = read_memory_unsigned_integer (fi->saved_regs[LR_REGNUM],
875 REGISTER_RAW_SIZE (LR_REGNUM));
876 fi->extra_info->return_pc = d10v_make_iaddr (return_pc);
880 fi->extra_info->return_pc = d10v_make_iaddr (read_register (LR_REGNUM));
883 /* The SP is not normally (ever?) saved, but check anyway */
884 if (!fi->saved_regs[SP_REGNUM])
886 /* if the FP was saved, that means the current FP is valid, */
887 /* otherwise, it isn't being used, so we use the SP instead */
889 fi->saved_regs[SP_REGNUM]
890 = d10v_read_fp () + fi->extra_info->size;
893 fi->saved_regs[SP_REGNUM] = fp + fi->extra_info->size;
894 fi->extra_info->frameless = 1;
895 fi->saved_regs[FP_REGNUM] = 0;
901 d10v_init_extra_frame_info (int fromleaf, struct frame_info *fi)
903 fi->extra_info = (struct frame_extra_info *)
904 frame_obstack_alloc (sizeof (struct frame_extra_info));
905 frame_saved_regs_zalloc (fi);
907 fi->extra_info->frameless = 0;
908 fi->extra_info->size = 0;
909 fi->extra_info->return_pc = 0;
911 /* If fi->pc is zero, but this is not the outermost frame,
912 then let's snatch the return_pc from the callee, so that
913 PC_IN_CALL_DUMMY will work. */
914 if (fi->pc == 0 && fi->level != 0 && fi->next != NULL)
915 fi->pc = d10v_frame_saved_pc (fi->next);
917 /* The call dummy doesn't save any registers on the stack, so we can
919 if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
925 d10v_frame_init_saved_regs (fi);
930 show_regs (char *args, int from_tty)
933 printf_filtered ("PC=%04lx (0x%lx) PSW=%04lx RPT_S=%04lx RPT_E=%04lx RPT_C=%04lx\n",
934 (long) read_register (PC_REGNUM),
935 (long) d10v_make_iaddr (read_register (PC_REGNUM)),
936 (long) read_register (PSW_REGNUM),
937 (long) read_register (24),
938 (long) read_register (25),
939 (long) read_register (23));
940 printf_filtered ("R0-R7 %04lx %04lx %04lx %04lx %04lx %04lx %04lx %04lx\n",
941 (long) read_register (0),
942 (long) read_register (1),
943 (long) read_register (2),
944 (long) read_register (3),
945 (long) read_register (4),
946 (long) read_register (5),
947 (long) read_register (6),
948 (long) read_register (7));
949 printf_filtered ("R8-R15 %04lx %04lx %04lx %04lx %04lx %04lx %04lx %04lx\n",
950 (long) read_register (8),
951 (long) read_register (9),
952 (long) read_register (10),
953 (long) read_register (11),
954 (long) read_register (12),
955 (long) read_register (13),
956 (long) read_register (14),
957 (long) read_register (15));
958 for (a = 0; a < NR_IMAP_REGS; a++)
961 printf_filtered (" ");
962 printf_filtered ("IMAP%d %04lx", a, d10v_imap_register (a));
964 if (NR_DMAP_REGS == 1)
965 printf_filtered (" DMAP %04lx\n", d10v_dmap_register (2));
968 for (a = 0; a < NR_DMAP_REGS; a++)
970 printf_filtered (" DMAP%d %04lx", a, d10v_dmap_register (a));
972 printf_filtered ("\n");
974 printf_filtered ("A0-A%d", NR_A_REGS - 1);
975 for (a = A0_REGNUM; a < A0_REGNUM + NR_A_REGS; a++)
977 char num[MAX_REGISTER_RAW_SIZE];
979 printf_filtered (" ");
980 read_register_gen (a, (char *) &num);
981 for (i = 0; i < MAX_REGISTER_RAW_SIZE; i++)
983 printf_filtered ("%02x", (num[i] & 0xff));
986 printf_filtered ("\n");
990 d10v_read_pc (ptid_t ptid)
996 save_ptid = inferior_ptid;
997 inferior_ptid = ptid;
998 pc = (int) read_register (PC_REGNUM);
999 inferior_ptid = save_ptid;
1000 retval = d10v_make_iaddr (pc);
1005 d10v_write_pc (CORE_ADDR val, ptid_t ptid)
1009 save_ptid = inferior_ptid;
1010 inferior_ptid = ptid;
1011 write_register (PC_REGNUM, d10v_convert_iaddr_to_raw (val));
1012 inferior_ptid = save_ptid;
1018 return (d10v_make_daddr (read_register (SP_REGNUM)));
1022 d10v_write_sp (CORE_ADDR val)
1024 write_register (SP_REGNUM, d10v_convert_daddr_to_raw (val));
1030 return (d10v_make_daddr (read_register (FP_REGNUM)));
1033 /* Function: push_return_address (pc)
1034 Set up the return address for the inferior function call.
1035 Needed for targets where we don't actually execute a JSR/BSR instruction */
1038 d10v_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
1040 write_register (LR_REGNUM, d10v_convert_iaddr_to_raw (CALL_DUMMY_ADDRESS ()));
1045 /* When arguments must be pushed onto the stack, they go on in reverse
1046 order. The below implements a FILO (stack) to do this. */
1051 struct stack_item *prev;
1055 static struct stack_item *push_stack_item (struct stack_item *prev,
1056 void *contents, int len);
1057 static struct stack_item *
1058 push_stack_item (struct stack_item *prev, void *contents, int len)
1060 struct stack_item *si;
1061 si = xmalloc (sizeof (struct stack_item));
1062 si->data = xmalloc (len);
1065 memcpy (si->data, contents, len);
1069 static struct stack_item *pop_stack_item (struct stack_item *si);
1070 static struct stack_item *
1071 pop_stack_item (struct stack_item *si)
1073 struct stack_item *dead = si;
1082 d10v_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
1083 int struct_return, CORE_ADDR struct_addr)
1086 int regnum = ARG1_REGNUM;
1087 struct stack_item *si = NULL;
1090 /* If struct_return is true, then the struct return address will
1091 consume one argument-passing register. No need to actually
1092 write the value to the register -- that's done by
1093 d10v_store_struct_return(). */
1098 /* Fill in registers and arg lists */
1099 for (i = 0; i < nargs; i++)
1101 struct value *arg = args[i];
1102 struct type *type = check_typedef (VALUE_TYPE (arg));
1103 char *contents = VALUE_CONTENTS (arg);
1104 int len = TYPE_LENGTH (type);
1105 int aligned_regnum = (regnum + 1) & ~1;
1107 /* printf ("push: type=%d len=%d\n", TYPE_CODE (type), len); */
1108 if (len <= 2 && regnum <= ARGN_REGNUM)
1109 /* fits in a single register, do not align */
1111 val = extract_unsigned_integer (contents, len);
1112 write_register (regnum++, val);
1114 else if (len <= (ARGN_REGNUM - aligned_regnum + 1) * 2)
1115 /* value fits in remaining registers, store keeping left
1119 regnum = aligned_regnum;
1120 for (b = 0; b < (len & ~1); b += 2)
1122 val = extract_unsigned_integer (&contents[b], 2);
1123 write_register (regnum++, val);
1127 val = extract_unsigned_integer (&contents[b], 1);
1128 write_register (regnum++, (val << 8));
1133 /* arg will go onto stack */
1134 regnum = ARGN_REGNUM + 1;
1135 si = push_stack_item (si, contents, len);
1141 sp = (sp - si->len) & ~1;
1142 write_memory (sp, si->data, si->len);
1143 si = pop_stack_item (si);
1150 /* Given a return value in `regbuf' with a type `valtype',
1151 extract and copy its value into `valbuf'. */
1154 d10v_extract_return_value (struct type *type, char regbuf[REGISTER_BYTES],
1159 printf("RET: TYPE=%d len=%d r%d=0x%x\n", TYPE_CODE (type),
1160 TYPE_LENGTH (type), RET1_REGNUM - R0_REGNUM,
1161 (int) extract_unsigned_integer (regbuf + REGISTER_BYTE(RET1_REGNUM),
1162 REGISTER_RAW_SIZE (RET1_REGNUM)));
1164 len = TYPE_LENGTH (type);
1169 c = extract_unsigned_integer (regbuf + REGISTER_BYTE (RET1_REGNUM),
1170 REGISTER_RAW_SIZE (RET1_REGNUM));
1171 store_unsigned_integer (valbuf, 1, c);
1173 else if ((len & 1) == 0)
1174 memcpy (valbuf, regbuf + REGISTER_BYTE (RET1_REGNUM), len);
1177 /* For return values of odd size, the first byte is in the
1178 least significant part of the first register. The
1179 remaining bytes in remaining registers. Interestingly,
1180 when such values are passed in, the last byte is in the
1181 most significant byte of that same register - wierd. */
1182 memcpy (valbuf, regbuf + REGISTER_BYTE (RET1_REGNUM) + 1, len);
1186 /* Translate a GDB virtual ADDR/LEN into a format the remote target
1187 understands. Returns number of bytes that can be transfered
1188 starting at TARG_ADDR. Return ZERO if no bytes can be transfered
1189 (segmentation fault). Since the simulator knows all about how the
1190 VM system works, we just call that to do the translation. */
1193 remote_d10v_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes,
1194 CORE_ADDR *targ_addr, int *targ_len)
1198 out_len = sim_d10v_translate_addr (memaddr, nr_bytes,
1201 d10v_imap_register);
1202 *targ_addr = out_addr;
1203 *targ_len = out_len;
1207 /* The following code implements access to, and display of, the D10V's
1208 instruction trace buffer. The buffer consists of 64K or more
1209 4-byte words of data, of which each words includes an 8-bit count,
1210 an 8-bit segment number, and a 16-bit instruction address.
1212 In theory, the trace buffer is continuously capturing instruction
1213 data that the CPU presents on its "debug bus", but in practice, the
1214 ROMified GDB stub only enables tracing when it continues or steps
1215 the program, and stops tracing when the program stops; so it
1216 actually works for GDB to read the buffer counter out of memory and
1217 then read each trace word. The counter records where the tracing
1218 stops, but there is no record of where it started, so we remember
1219 the PC when we resumed and then search backwards in the trace
1220 buffer for a word that includes that address. This is not perfect,
1221 because you will miss trace data if the resumption PC is the target
1222 of a branch. (The value of the buffer counter is semi-random, any
1223 trace data from a previous program stop is gone.) */
1225 /* The address of the last word recorded in the trace buffer. */
1227 #define DBBC_ADDR (0xd80000)
1229 /* The base of the trace buffer, at least for the "Board_0". */
1231 #define TRACE_BUFFER_BASE (0xf40000)
1233 static void trace_command (char *, int);
1235 static void untrace_command (char *, int);
1237 static void trace_info (char *, int);
1239 static void tdisassemble_command (char *, int);
1241 static void display_trace (int, int);
1243 /* True when instruction traces are being collected. */
1247 /* Remembered PC. */
1249 static CORE_ADDR last_pc;
1251 /* True when trace output should be displayed whenever program stops. */
1253 static int trace_display;
1255 /* True when trace listing should include source lines. */
1257 static int default_trace_show_source = 1;
1268 trace_command (char *args, int from_tty)
1270 /* Clear the host-side trace buffer, allocating space if needed. */
1271 trace_data.size = 0;
1272 if (trace_data.counts == NULL)
1273 trace_data.counts = (short *) xmalloc (65536 * sizeof (short));
1274 if (trace_data.addrs == NULL)
1275 trace_data.addrs = (CORE_ADDR *) xmalloc (65536 * sizeof (CORE_ADDR));
1279 printf_filtered ("Tracing is now on.\n");
1283 untrace_command (char *args, int from_tty)
1287 printf_filtered ("Tracing is now off.\n");
1291 trace_info (char *args, int from_tty)
1295 if (trace_data.size)
1297 printf_filtered ("%d entries in trace buffer:\n", trace_data.size);
1299 for (i = 0; i < trace_data.size; ++i)
1301 printf_filtered ("%d: %d instruction%s at 0x%s\n",
1303 trace_data.counts[i],
1304 (trace_data.counts[i] == 1 ? "" : "s"),
1305 paddr_nz (trace_data.addrs[i]));
1309 printf_filtered ("No entries in trace buffer.\n");
1311 printf_filtered ("Tracing is currently %s.\n", (tracing ? "on" : "off"));
1314 /* Print the instruction at address MEMADDR in debugged memory,
1315 on STREAM. Returns length of the instruction, in bytes. */
1318 print_insn (CORE_ADDR memaddr, struct ui_file *stream)
1320 /* If there's no disassembler, something is very wrong. */
1321 if (tm_print_insn == NULL)
1322 internal_error (__FILE__, __LINE__,
1323 "print_insn: no disassembler");
1325 if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
1326 tm_print_insn_info.endian = BFD_ENDIAN_BIG;
1328 tm_print_insn_info.endian = BFD_ENDIAN_LITTLE;
1329 return TARGET_PRINT_INSN (memaddr, &tm_print_insn_info);
1333 d10v_eva_prepare_to_trace (void)
1338 last_pc = read_register (PC_REGNUM);
1341 /* Collect trace data from the target board and format it into a form
1342 more useful for display. */
1345 d10v_eva_get_trace_data (void)
1347 int count, i, j, oldsize;
1348 int trace_addr, trace_seg, trace_cnt, next_cnt;
1349 unsigned int last_trace, trace_word, next_word;
1350 unsigned int *tmpspace;
1355 tmpspace = xmalloc (65536 * sizeof (unsigned int));
1357 last_trace = read_memory_unsigned_integer (DBBC_ADDR, 2) << 2;
1359 /* Collect buffer contents from the target, stopping when we reach
1360 the word recorded when execution resumed. */
1363 while (last_trace > 0)
1367 read_memory_unsigned_integer (TRACE_BUFFER_BASE + last_trace, 4);
1368 trace_addr = trace_word & 0xffff;
1370 /* Ignore an apparently nonsensical entry. */
1371 if (trace_addr == 0xffd5)
1373 tmpspace[count++] = trace_word;
1374 if (trace_addr == last_pc)
1380 /* Move the data to the host-side trace buffer, adjusting counts to
1381 include the last instruction executed and transforming the address
1382 into something that GDB likes. */
1384 for (i = 0; i < count; ++i)
1386 trace_word = tmpspace[i];
1387 next_word = ((i == 0) ? 0 : tmpspace[i - 1]);
1388 trace_addr = trace_word & 0xffff;
1389 next_cnt = (next_word >> 24) & 0xff;
1390 j = trace_data.size + count - i - 1;
1391 trace_data.addrs[j] = (trace_addr << 2) + 0x1000000;
1392 trace_data.counts[j] = next_cnt + 1;
1395 oldsize = trace_data.size;
1396 trace_data.size += count;
1401 display_trace (oldsize, trace_data.size);
1405 tdisassemble_command (char *arg, int from_tty)
1408 CORE_ADDR low, high;
1414 high = trace_data.size;
1416 else if (!(space_index = (char *) strchr (arg, ' ')))
1418 low = parse_and_eval_address (arg);
1423 /* Two arguments. */
1424 *space_index = '\0';
1425 low = parse_and_eval_address (arg);
1426 high = parse_and_eval_address (space_index + 1);
1431 printf_filtered ("Dump of trace from %s to %s:\n", paddr_u (low), paddr_u (high));
1433 display_trace (low, high);
1435 printf_filtered ("End of trace dump.\n");
1436 gdb_flush (gdb_stdout);
1440 display_trace (int low, int high)
1442 int i, count, trace_show_source, first, suppress;
1443 CORE_ADDR next_address;
1445 trace_show_source = default_trace_show_source;
1446 if (!have_full_symbols () && !have_partial_symbols ())
1448 trace_show_source = 0;
1449 printf_filtered ("No symbol table is loaded. Use the \"file\" command.\n");
1450 printf_filtered ("Trace will not display any source.\n");
1455 for (i = low; i < high; ++i)
1457 next_address = trace_data.addrs[i];
1458 count = trace_data.counts[i];
1462 if (trace_show_source)
1464 struct symtab_and_line sal, sal_prev;
1466 sal_prev = find_pc_line (next_address - 4, 0);
1467 sal = find_pc_line (next_address, 0);
1471 if (first || sal.line != sal_prev.line)
1472 print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
1478 /* FIXME-32x64--assumes sal.pc fits in long. */
1479 printf_filtered ("No source file for address %s.\n",
1480 local_hex_string ((unsigned long) sal.pc));
1485 print_address (next_address, gdb_stdout);
1486 printf_filtered (":");
1487 printf_filtered ("\t");
1489 next_address = next_address + print_insn (next_address, gdb_stdout);
1490 printf_filtered ("\n");
1491 gdb_flush (gdb_stdout);
1497 static gdbarch_init_ftype d10v_gdbarch_init;
1499 static struct gdbarch *
1500 d10v_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1502 static LONGEST d10v_call_dummy_words[] =
1504 struct gdbarch *gdbarch;
1506 struct gdbarch_tdep *tdep;
1507 gdbarch_register_name_ftype *d10v_register_name;
1508 gdbarch_register_sim_regno_ftype *d10v_register_sim_regno;
1510 /* Find a candidate among the list of pre-declared architectures. */
1511 arches = gdbarch_list_lookup_by_info (arches, &info);
1513 return arches->gdbarch;
1515 /* None found, create a new architecture from the information
1517 tdep = XMALLOC (struct gdbarch_tdep);
1518 gdbarch = gdbarch_alloc (&info, tdep);
1520 switch (info.bfd_arch_info->mach)
1522 case bfd_mach_d10v_ts2:
1524 d10v_register_name = d10v_ts2_register_name;
1525 d10v_register_sim_regno = d10v_ts2_register_sim_regno;
1526 tdep->a0_regnum = TS2_A0_REGNUM;
1527 tdep->nr_dmap_regs = TS2_NR_DMAP_REGS;
1528 tdep->dmap_register = d10v_ts2_dmap_register;
1529 tdep->imap_register = d10v_ts2_imap_register;
1532 case bfd_mach_d10v_ts3:
1534 d10v_register_name = d10v_ts3_register_name;
1535 d10v_register_sim_regno = d10v_ts3_register_sim_regno;
1536 tdep->a0_regnum = TS3_A0_REGNUM;
1537 tdep->nr_dmap_regs = TS3_NR_DMAP_REGS;
1538 tdep->dmap_register = d10v_ts3_dmap_register;
1539 tdep->imap_register = d10v_ts3_imap_register;
1543 set_gdbarch_read_pc (gdbarch, d10v_read_pc);
1544 set_gdbarch_write_pc (gdbarch, d10v_write_pc);
1545 set_gdbarch_read_fp (gdbarch, d10v_read_fp);
1546 set_gdbarch_read_sp (gdbarch, d10v_read_sp);
1547 set_gdbarch_write_sp (gdbarch, d10v_write_sp);
1549 set_gdbarch_num_regs (gdbarch, d10v_num_regs);
1550 set_gdbarch_sp_regnum (gdbarch, 15);
1551 set_gdbarch_fp_regnum (gdbarch, 11);
1552 set_gdbarch_pc_regnum (gdbarch, 18);
1553 set_gdbarch_register_name (gdbarch, d10v_register_name);
1554 set_gdbarch_register_size (gdbarch, 2);
1555 set_gdbarch_register_bytes (gdbarch, (d10v_num_regs - 2) * 2 + 16);
1556 set_gdbarch_register_byte (gdbarch, d10v_register_byte);
1557 set_gdbarch_register_raw_size (gdbarch, d10v_register_raw_size);
1558 set_gdbarch_max_register_raw_size (gdbarch, 8);
1559 set_gdbarch_register_virtual_size (gdbarch, generic_register_size);
1560 set_gdbarch_max_register_virtual_size (gdbarch, 8);
1561 set_gdbarch_register_virtual_type (gdbarch, d10v_register_virtual_type);
1563 set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT);
1564 set_gdbarch_addr_bit (gdbarch, 32);
1565 set_gdbarch_address_to_pointer (gdbarch, d10v_address_to_pointer);
1566 set_gdbarch_pointer_to_address (gdbarch, d10v_pointer_to_address);
1567 set_gdbarch_integer_to_address (gdbarch, d10v_integer_to_address);
1568 set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
1569 set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT);
1570 set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
1571 set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
1572 /* NOTE: The d10v as a 32 bit ``float'' and ``double''. ``long
1573 double'' is 64 bits. */
1574 set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
1575 set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT);
1576 set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
1577 switch (info.byte_order)
1579 case BFD_ENDIAN_BIG:
1580 set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_big);
1581 set_gdbarch_double_format (gdbarch, &floatformat_ieee_single_big);
1582 set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
1584 case BFD_ENDIAN_LITTLE:
1585 set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_little);
1586 set_gdbarch_double_format (gdbarch, &floatformat_ieee_single_little);
1587 set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_little);
1590 internal_error (__FILE__, __LINE__,
1591 "d10v_gdbarch_init: bad byte order for float format");
1594 set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
1595 set_gdbarch_call_dummy_length (gdbarch, 0);
1596 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
1597 set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
1598 set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
1599 set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
1600 set_gdbarch_call_dummy_start_offset (gdbarch, 0);
1601 set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy);
1602 set_gdbarch_call_dummy_words (gdbarch, d10v_call_dummy_words);
1603 set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (d10v_call_dummy_words));
1604 set_gdbarch_call_dummy_p (gdbarch, 1);
1605 set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
1606 set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register);
1607 set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
1609 set_gdbarch_deprecated_extract_return_value (gdbarch, d10v_extract_return_value);
1610 set_gdbarch_push_arguments (gdbarch, d10v_push_arguments);
1611 set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
1612 set_gdbarch_push_return_address (gdbarch, d10v_push_return_address);
1614 set_gdbarch_store_struct_return (gdbarch, d10v_store_struct_return);
1615 set_gdbarch_store_return_value (gdbarch, d10v_store_return_value);
1616 set_gdbarch_deprecated_extract_struct_value_address (gdbarch, d10v_extract_struct_value_address);
1617 set_gdbarch_use_struct_convention (gdbarch, d10v_use_struct_convention);
1619 set_gdbarch_frame_init_saved_regs (gdbarch, d10v_frame_init_saved_regs);
1620 set_gdbarch_init_extra_frame_info (gdbarch, d10v_init_extra_frame_info);
1622 set_gdbarch_pop_frame (gdbarch, d10v_pop_frame);
1624 set_gdbarch_skip_prologue (gdbarch, d10v_skip_prologue);
1625 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1626 set_gdbarch_decr_pc_after_break (gdbarch, 4);
1627 set_gdbarch_function_start_offset (gdbarch, 0);
1628 set_gdbarch_breakpoint_from_pc (gdbarch, d10v_breakpoint_from_pc);
1630 set_gdbarch_remote_translate_xfer_address (gdbarch, remote_d10v_translate_xfer_address);
1632 set_gdbarch_frame_args_skip (gdbarch, 0);
1633 set_gdbarch_frameless_function_invocation (gdbarch, frameless_look_for_prologue);
1634 set_gdbarch_frame_chain (gdbarch, d10v_frame_chain);
1635 set_gdbarch_frame_chain_valid (gdbarch, d10v_frame_chain_valid);
1636 set_gdbarch_frame_saved_pc (gdbarch, d10v_frame_saved_pc);
1637 set_gdbarch_frame_args_address (gdbarch, default_frame_address);
1638 set_gdbarch_frame_locals_address (gdbarch, default_frame_address);
1639 set_gdbarch_saved_pc_after_call (gdbarch, d10v_saved_pc_after_call);
1640 set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
1641 set_gdbarch_stack_align (gdbarch, d10v_stack_align);
1643 set_gdbarch_register_sim_regno (gdbarch, d10v_register_sim_regno);
1644 set_gdbarch_extra_stack_alignment_needed (gdbarch, 0);
1650 extern void (*target_resume_hook) (void);
1651 extern void (*target_wait_loop_hook) (void);
1654 _initialize_d10v_tdep (void)
1656 register_gdbarch_init (bfd_arch_d10v, d10v_gdbarch_init);
1658 tm_print_insn = print_insn_d10v;
1660 target_resume_hook = d10v_eva_prepare_to_trace;
1661 target_wait_loop_hook = d10v_eva_get_trace_data;
1663 add_com ("regs", class_vars, show_regs, "Print all registers");
1665 add_com ("itrace", class_support, trace_command,
1666 "Enable tracing of instruction execution.");
1668 add_com ("iuntrace", class_support, untrace_command,
1669 "Disable tracing of instruction execution.");
1671 add_com ("itdisassemble", class_vars, tdisassemble_command,
1672 "Disassemble the trace buffer.\n\
1673 Two optional arguments specify a range of trace buffer entries\n\
1674 as reported by info trace (NOT addresses!).");
1676 add_info ("itrace", trace_info,
1677 "Display info about the trace data buffer.");
1679 add_show_from_set (add_set_cmd ("itracedisplay", no_class,
1680 var_integer, (char *) &trace_display,
1681 "Set automatic display of trace.\n", &setlist),
1683 add_show_from_set (add_set_cmd ("itracesource", no_class,
1684 var_integer, (char *) &default_trace_show_source,
1685 "Set display of source code with trace.\n", &setlist),