1 /* Target-dependent code for the Matsushita MN10200 for GDB, the GNU debugger.
2 Copyright 1997 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 #include "gdb_string.h"
32 /* Should call_function allocate stack space for a struct return? */
34 mn10200_use_struct_convention (gcc_p
, type
)
38 return (TYPE_NFIELDS (type
) > 1 || TYPE_LENGTH (type
) > 8);
43 /* The main purpose of this file is dealing with prologues to extract
44 information about stack frames and saved registers.
46 For reference here's how prologues look on the mn10200:
52 Register saves for d2, d3, a1, a2 as needed. Saves start
53 at fp - <size> + <outgoing_args_size> and work towards higher
54 addresses. Note that the saves are actually done off the stack
55 pointer in the prologue! This makes for smaller code and easier
56 prologue scanning as the displacement fields will unlikely
59 Without frame pointer:
61 Register saves for d2, d3, a1, a2 as needed. Saves start
62 at sp + <outgoing_args_size> and work towards higher addresses.
65 add <local size>,sp -- optional
67 add <outgoing_size>,sp -- optional
69 The stack pointer remains constant throughout the life of most
70 functions. As a result the compiler will usually omit the
71 frame pointer, so we must handle frame pointerless functions. */
73 /* Analyze the prologue to determine where registers are saved,
74 the end of the prologue, etc etc. Return the end of the prologue
77 We store into FI (if non-null) several tidbits of information:
79 * stack_size -- size of this stack frame. Note that if we stop in
80 certain parts of the prologue/epilogue we may claim the size of the
81 current frame is zero. This happens when the current frame has
82 not been allocated yet or has already been deallocated.
84 * fsr -- Addresses of registers saved in the stack by this frame.
86 * status -- A (relatively) generic status indicator. It's a bitmask
87 with the following bits:
89 MY_FRAME_IN_SP: The base of the current frame is actually in
90 the stack pointer. This can happen for frame pointerless
91 functions, or cases where we're stopped in the prologue/epilogue
92 itself. For these cases mn10200_analyze_prologue will need up
93 update fi->frame before returning or analyzing the register
96 MY_FRAME_IN_FP: The base of the current frame is in the
97 frame pointer register ($a2).
99 CALLER_A2_IN_A0: $a2 from the caller's frame is temporarily
100 in $a0. This can happen if we're stopped in the prologue.
102 NO_MORE_FRAMES: Set this if the current frame is "start" or
103 if the first instruction looks like mov <imm>,sp. This tells
104 frame chain to not bother trying to unwind past this frame. */
107 #define MY_FRAME_IN_SP 0x1
108 #define MY_FRAME_IN_FP 0x2
109 #define CALLER_A2_IN_A0 0x4
110 #define NO_MORE_FRAMES 0x8
113 mn10200_analyze_prologue (fi
, pc
)
114 struct frame_info
*fi
;
117 CORE_ADDR func_addr
, func_end
, addr
, stop
;
118 CORE_ADDR stack_size
;
119 unsigned char buf
[4];
122 int out_of_line_prologue
= 0;
124 /* Use the PC in the frame if it's provided to look up the
125 start of this function. */
126 pc
= (fi
? fi
->pc
: pc
);
128 /* Find the start of this function. */
129 status
= find_pc_partial_function (pc
, &name
, &func_addr
, &func_end
);
131 /* Do nothing if we couldn't find the start of this function or if we're
132 stopped at the first instruction in the prologue. */
136 /* If we're in start, then give up. */
137 if (strcmp (name
, "start") == 0)
140 fi
->status
= NO_MORE_FRAMES
;
144 /* At the start of a function our frame is in the stack pointer. */
146 fi
->status
= MY_FRAME_IN_SP
;
148 /* If we're physically on an RTS instruction, then our frame has already
151 fi->frame is bogus, we need to fix it. */
152 if (fi
&& fi
->pc
+ 1 == func_end
)
154 status
= target_read_memory (fi
->pc
, buf
, 1);
157 if (fi
->next
== NULL
)
158 fi
->frame
= read_sp ();
164 if (fi
->next
== NULL
)
165 fi
->frame
= read_sp ();
170 /* Similarly if we're stopped on the first insn of a prologue as our
171 frame hasn't been allocated yet. */
172 if (fi
&& fi
->pc
== func_addr
)
174 if (fi
->next
== NULL
)
175 fi
->frame
= read_sp ();
179 /* Figure out where to stop scanning. */
180 stop
= fi
? fi
->pc
: func_end
;
182 /* Don't walk off the end of the function. */
183 stop
= stop
> func_end
? func_end
: stop
;
185 /* Start scanning on the first instruction of this function. */
188 status
= target_read_memory (addr
, buf
, 2);
191 if (fi
&& fi
->next
== NULL
&& fi
->status
& MY_FRAME_IN_SP
)
192 fi
->frame
= read_sp ();
196 /* First see if this insn sets the stack pointer; if so, it's something
197 we won't understand, so quit now. */
199 || (buf
[0] == 0xf4 && buf
[1] == 0x77))
202 fi
->status
= NO_MORE_FRAMES
;
206 /* Now see if we have a frame pointer.
208 Search for mov a2,a0 (0xf278)
209 then mov a3,a2 (0xf27e). */
211 if (buf
[0] == 0xf2 && buf
[1] == 0x78)
213 /* Our caller's $a2 will be found in $a0 now. Note it for
216 fi
->status
|= CALLER_A2_IN_A0
;
220 /* We still haven't allocated our local stack. Handle this
221 as if we stopped on the first or last insn of a function. */
222 if (fi
&& fi
->next
== NULL
)
223 fi
->frame
= read_sp ();
227 status
= target_read_memory (addr
, buf
, 2);
230 if (fi
&& fi
->next
== NULL
)
231 fi
->frame
= read_sp ();
234 if (buf
[0] == 0xf2 && buf
[1] == 0x7e)
238 /* Our frame pointer is valid now. */
241 fi
->status
|= MY_FRAME_IN_FP
;
242 fi
->status
&= ~MY_FRAME_IN_SP
;
249 if (fi
&& fi
->next
== NULL
)
250 fi
->frame
= read_sp ();
255 /* Next we should allocate the local frame.
257 Search for add imm8,a3 (0xd3XX)
258 or add imm16,a3 (0xf70bXXXX)
259 or add imm24,a3 (0xf467XXXXXX).
261 If none of the above was found, then this prologue has
262 no stack, and therefore can't have any register saves,
264 status
= target_read_memory (addr
, buf
, 2);
267 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
268 fi
->frame
= read_sp ();
273 stack_size
= extract_signed_integer (&buf
[1], 1);
275 fi
->stack_size
= stack_size
;
279 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
280 fi
->frame
= read_sp () - stack_size
;
284 else if (buf
[0] == 0xf7 && buf
[1] == 0x0b)
286 status
= target_read_memory (addr
+ 2, buf
, 2);
289 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
290 fi
->frame
= read_sp ();
293 stack_size
= extract_signed_integer (buf
, 2);
295 fi
->stack_size
= stack_size
;
299 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
300 fi
->frame
= read_sp () - stack_size
;
304 else if (buf
[0] == 0xf4 && buf
[1] == 0x67)
306 status
= target_read_memory (addr
+ 2, buf
, 3);
309 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
310 fi
->frame
= read_sp ();
313 stack_size
= extract_signed_integer (buf
, 3);
315 fi
->stack_size
= stack_size
;
319 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
320 fi
->frame
= read_sp () - stack_size
;
325 /* Now see if we have a call to __prologue for an out of line
327 status
= target_read_memory (addr
, buf
, 2);
331 /* First check for 16bit pc-relative call to __prologue. */
335 status
= target_read_memory (addr
+ 1, buf
, 2);
338 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
339 fi
->frame
= read_sp ();
343 /* Get the PC this instruction will branch to. */
344 temp
= (extract_signed_integer (buf
, 2) + addr
+ 3) & 0xffffff;
346 /* Get the name of the function at the target address. */
347 status
= find_pc_partial_function (temp
, &name
, NULL
, NULL
);
350 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
351 fi
->frame
= read_sp ();
355 /* Note if it is an out of line prologue. */
356 out_of_line_prologue
= (strcmp (name
, "__prologue") == 0);
358 /* This sucks up 3 bytes of instruction space. */
359 if (out_of_line_prologue
)
364 if (fi
&& fi
->next
== NULL
)
366 fi
->stack_size
-= 16;
367 fi
->frame
= read_sp () - fi
->stack_size
;
372 /* Now check for the 24bit pc-relative call to __prologue. */
373 else if (buf
[0] == 0xf4 && buf
[1] == 0xe1)
376 status
= target_read_memory (addr
+ 2, buf
, 3);
379 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
380 fi
->frame
= read_sp ();
384 /* Get the PC this instruction will branch to. */
385 temp
= (extract_signed_integer (buf
, 3) + addr
+ 5) & 0xffffff;
387 /* Get the name of the function at the target address. */
388 status
= find_pc_partial_function (temp
, &name
, NULL
, NULL
);
391 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
392 fi
->frame
= read_sp ();
396 /* Note if it is an out of line prologue. */
397 out_of_line_prologue
= (strcmp (name
, "__prologue") == 0);
399 /* This sucks up 5 bytes of instruction space. */
400 if (out_of_line_prologue
)
405 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
))
407 fi
->stack_size
-= 16;
408 fi
->frame
= read_sp () - fi
->stack_size
;
414 /* Now actually handle the out of line prologue. */
415 if (out_of_line_prologue
)
417 int outgoing_args_size
= 0;
419 /* First adjust the stack size for this function. The out of
420 line prologue saves 4 registers (16bytes of data). */
422 fi
->stack_size
-= 16;
424 /* Update fi->frame if necessary. */
425 if (fi
&& fi
->next
== NULL
)
426 fi
->frame
= read_sp () - fi
->stack_size
;
428 /* After the out of line prologue, there may be another
429 stack adjustment for the outgoing arguments.
431 Search for add imm8,a3 (0xd3XX)
432 or add imm16,a3 (0xf70bXXXX)
433 or add imm24,a3 (0xf467XXXXXX). */
435 status
= target_read_memory (addr
, buf
, 2);
440 fi
->fsr
.regs
[2] = fi
->frame
+ fi
->stack_size
+ 4;
441 fi
->fsr
.regs
[3] = fi
->frame
+ fi
->stack_size
+ 8;
442 fi
->fsr
.regs
[5] = fi
->frame
+ fi
->stack_size
+ 12;
443 fi
->fsr
.regs
[6] = fi
->frame
+ fi
->stack_size
+ 16;
450 outgoing_args_size
= extract_signed_integer (&buf
[1], 1);
453 else if (buf
[0] == 0xf7 && buf
[1] == 0x0b)
455 status
= target_read_memory (addr
+ 2, buf
, 2);
460 fi
->fsr
.regs
[2] = fi
->frame
+ fi
->stack_size
+ 4;
461 fi
->fsr
.regs
[3] = fi
->frame
+ fi
->stack_size
+ 8;
462 fi
->fsr
.regs
[5] = fi
->frame
+ fi
->stack_size
+ 12;
463 fi
->fsr
.regs
[6] = fi
->frame
+ fi
->stack_size
+ 16;
467 outgoing_args_size
= extract_signed_integer (buf
, 2);
470 else if (buf
[0] == 0xf4 && buf
[1] == 0x67)
472 status
= target_read_memory (addr
+ 2, buf
, 3);
475 if (fi
&& fi
->next
== NULL
)
477 fi
->fsr
.regs
[2] = fi
->frame
+ fi
->stack_size
+ 4;
478 fi
->fsr
.regs
[3] = fi
->frame
+ fi
->stack_size
+ 8;
479 fi
->fsr
.regs
[5] = fi
->frame
+ fi
->stack_size
+ 12;
480 fi
->fsr
.regs
[6] = fi
->frame
+ fi
->stack_size
+ 16;
484 outgoing_args_size
= extract_signed_integer (buf
, 3);
488 outgoing_args_size
= 0;
490 /* Now that we know the size of the outgoing arguments, fix
491 fi->frame again if this is the innermost frame. */
492 if (fi
&& fi
->next
== NULL
)
493 fi
->frame
-= outgoing_args_size
;
495 /* Note the register save information and update the stack
496 size for this frame too. */
499 fi
->fsr
.regs
[2] = fi
->frame
+ fi
->stack_size
+ 4;
500 fi
->fsr
.regs
[3] = fi
->frame
+ fi
->stack_size
+ 8;
501 fi
->fsr
.regs
[5] = fi
->frame
+ fi
->stack_size
+ 12;
502 fi
->fsr
.regs
[6] = fi
->frame
+ fi
->stack_size
+ 16;
503 fi
->stack_size
+= outgoing_args_size
;
505 /* There can be no more prologue insns, so return now. */
509 /* At this point fi->frame needs to be correct.
511 If MY_FRAME_IN_SP is set and we're the innermost frame, then we
512 need to fix fi->frame so that backtracing, find_frame_saved_regs,
513 etc work correctly. */
514 if (fi
&& fi
->next
== NULL
&& (fi
->status
& MY_FRAME_IN_SP
) != 0)
515 fi
->frame
= read_sp () - fi
->stack_size
;
517 /* And last we have the register saves. These are relatively
518 simple because they're physically done off the stack pointer,
519 and thus the number of different instructions we need to
520 check is greatly reduced because we know the displacements
523 Search for movx d2,(X,a3) (0xf55eXX)
524 then movx d3,(X,a3) (0xf55fXX)
525 then mov a1,(X,a3) (0x5dXX) No frame pointer case
526 then mov a2,(X,a3) (0x5eXX) No frame pointer case
527 or mov a0,(X,a3) (0x5cXX) Frame pointer case. */
529 status
= target_read_memory (addr
, buf
, 2);
532 if (buf
[0] == 0xf5 && buf
[1] == 0x5e)
536 status
= target_read_memory (addr
+ 2, buf
, 1);
539 fi
->fsr
.regs
[2] = (fi
->frame
+ stack_size
540 + extract_signed_integer (buf
, 1));
545 status
= target_read_memory (addr
, buf
, 2);
549 if (buf
[0] == 0xf5 && buf
[1] == 0x5f)
553 status
= target_read_memory (addr
+ 2, buf
, 1);
556 fi
->fsr
.regs
[3] = (fi
->frame
+ stack_size
557 + extract_signed_integer (buf
, 1));
562 status
= target_read_memory (addr
, buf
, 2);
570 status
= target_read_memory (addr
+ 1, buf
, 1);
573 fi
->fsr
.regs
[5] = (fi
->frame
+ stack_size
574 + extract_signed_integer (buf
, 1));
579 status
= target_read_memory (addr
, buf
, 2);
583 if (buf
[0] == 0x5e || buf
[0] == 0x5c)
587 status
= target_read_memory (addr
+ 1, buf
, 1);
590 fi
->fsr
.regs
[6] = (fi
->frame
+ stack_size
591 + extract_signed_integer (buf
, 1));
592 fi
->status
&= ~CALLER_A2_IN_A0
;
602 /* Function: frame_chain
603 Figure out and return the caller's frame pointer given current
606 We don't handle dummy frames yet but we would probably just return the
607 stack pointer that was in use at the time the function call was made? */
610 mn10200_frame_chain (fi
)
611 struct frame_info
*fi
;
613 struct frame_info dummy_frame
;
615 /* Walk through the prologue to determine the stack size,
616 location of saved registers, end of the prologue, etc. */
618 mn10200_analyze_prologue (fi
, (CORE_ADDR
)0);
620 /* Quit now if mn10200_analyze_prologue set NO_MORE_FRAMES. */
621 if (fi
->status
& NO_MORE_FRAMES
)
624 /* Now that we've analyzed our prologue, determine the frame
625 pointer for our caller.
627 If our caller has a frame pointer, then we need to
628 find the entry value of $a2 to our function.
630 If CALLER_A2_IN_A0, then the chain is in $a0.
632 If fsr.regs[6] is nonzero, then it's at the memory
633 location pointed to by fsr.regs[6].
635 Else it's still in $a2.
637 If our caller does not have a frame pointer, then his
638 frame base is fi->frame + -caller's stack size + 4. */
640 /* The easiest way to get that info is to analyze our caller's frame.
642 So we set up a dummy frame and call mn10200_analyze_prologue to
643 find stuff for us. */
644 dummy_frame
.pc
= FRAME_SAVED_PC (fi
);
645 dummy_frame
.frame
= fi
->frame
;
646 memset (dummy_frame
.fsr
.regs
, '\000', sizeof dummy_frame
.fsr
.regs
);
647 dummy_frame
.status
= 0;
648 dummy_frame
.stack_size
= 0;
649 mn10200_analyze_prologue (&dummy_frame
);
651 if (dummy_frame
.status
& MY_FRAME_IN_FP
)
653 /* Our caller has a frame pointer. So find the frame in $a2, $a0,
656 return (read_memory_integer (fi
->fsr
.regs
[FP_REGNUM
], REGISTER_SIZE
)
658 else if (fi
->status
& CALLER_A2_IN_A0
)
659 return read_register (4);
661 return read_register (FP_REGNUM
);
665 /* Our caller does not have a frame pointer. So his frame starts
666 at the base of our frame (fi->frame) + <his size> + 4 (saved pc). */
667 return fi
->frame
+ -dummy_frame
.stack_size
+ 4;
671 /* Function: skip_prologue
672 Return the address of the first inst past the prologue of the function. */
675 mn10200_skip_prologue (pc
)
678 /* We used to check the debug symbols, but that can lose if
679 we have a null prologue. */
680 return mn10200_analyze_prologue (NULL
, pc
);
683 /* Function: pop_frame
684 This routine gets called when either the user uses the `return'
685 command, or the call dummy breakpoint gets hit. */
688 mn10200_pop_frame (frame
)
689 struct frame_info
*frame
;
693 if (PC_IN_CALL_DUMMY(frame
->pc
, frame
->frame
, frame
->frame
))
694 generic_pop_dummy_frame ();
697 write_register (PC_REGNUM
, FRAME_SAVED_PC (frame
));
699 /* Restore any saved registers. */
700 for (regnum
= 0; regnum
< NUM_REGS
; regnum
++)
701 if (frame
->fsr
.regs
[regnum
] != 0)
705 value
= read_memory_unsigned_integer (frame
->fsr
.regs
[regnum
],
706 REGISTER_RAW_SIZE (regnum
));
707 write_register (regnum
, value
);
710 /* Actually cut back the stack. */
711 write_register (SP_REGNUM
, FRAME_FP (frame
));
713 /* Don't we need to set the PC?!? XXX FIXME. */
716 /* Throw away any cached frame information. */
717 flush_cached_frames ();
720 /* Function: push_arguments
721 Setup arguments for a call to the target. Arguments go in
722 order on the stack. */
725 mn10200_push_arguments (nargs
, args
, sp
, struct_return
, struct_addr
)
729 unsigned char struct_return
;
730 CORE_ADDR struct_addr
;
734 int stack_offset
= 0;
735 int regsused
= struct_return
? 1 : 0;
737 /* This should be a nop, but align the stack just in case something
738 went wrong. Stacks are two byte aligned on the mn10200. */
741 /* Now make space on the stack for the args.
743 XXX This doesn't appear to handle pass-by-invisible reference
745 for (argnum
= 0; argnum
< nargs
; argnum
++)
747 int arg_length
= (TYPE_LENGTH (VALUE_TYPE (args
[argnum
])) + 1) & ~1;
749 /* If we've used all argument registers, then this argument is
751 if (regsused
>= 2 || arg_length
> 4)
756 /* We know we've got some arg register space left. If this argument
757 will fit entirely in regs, then put it there. */
758 else if (arg_length
<= 2
759 || TYPE_CODE (VALUE_TYPE (args
[argnum
])) == TYPE_CODE_PTR
)
763 else if (regsused
== 0)
774 /* Allocate stack space. */
777 regsused
= struct_return
? 1 : 0;
778 /* Push all arguments onto the stack. */
779 for (argnum
= 0; argnum
< nargs
; argnum
++)
784 /* XXX Check this. What about UNIONS? */
785 if (TYPE_CODE (VALUE_TYPE (*args
)) == TYPE_CODE_STRUCT
786 && TYPE_LENGTH (VALUE_TYPE (*args
)) > 8)
788 /* XXX Wrong, we want a pointer to this argument. */
789 len
= TYPE_LENGTH (VALUE_TYPE (*args
));
790 val
= (char *)VALUE_CONTENTS (*args
);
794 len
= TYPE_LENGTH (VALUE_TYPE (*args
));
795 val
= (char *)VALUE_CONTENTS (*args
);
800 || TYPE_CODE (VALUE_TYPE (*args
)) == TYPE_CODE_PTR
))
802 write_register (regsused
, extract_unsigned_integer (val
, 4));
805 else if (regsused
== 0 && len
== 4)
807 write_register (regsused
, extract_unsigned_integer (val
, 2));
808 write_register (regsused
+ 1, extract_unsigned_integer (val
+ 2, 2));
816 write_memory (sp
+ stack_offset
, val
, 2);
829 /* Function: push_return_address (pc)
830 Set up the return address for the inferior function call.
831 Needed for targets where we don't actually execute a JSR/BSR instruction */
834 mn10200_push_return_address (pc
, sp
)
838 unsigned char buf
[4];
840 store_unsigned_integer (buf
, 4, CALL_DUMMY_ADDRESS ());
841 write_memory (sp
- 4, buf
, 4);
845 /* Function: store_struct_return (addr,sp)
846 Store the structure value return address for an inferior function
850 mn10200_store_struct_return (addr
, sp
)
854 /* The structure return address is passed as the first argument. */
855 write_register (0, addr
);
859 /* Function: frame_saved_pc
860 Find the caller of this frame. We do this by seeing if RP_REGNUM
861 is saved in the stack anywhere, otherwise we get it from the
862 registers. If the inner frame is a dummy frame, return its PC
863 instead of RP, because that's where "caller" of the dummy-frame
867 mn10200_frame_saved_pc (fi
)
868 struct frame_info
*fi
;
870 /* The saved PC will always be at the base of the current frame. */
871 return (read_memory_integer (fi
->frame
, REGISTER_SIZE
) & 0xffffff);
874 /* Function: init_extra_frame_info
875 Setup the frame's frame pointer, pc, and frame addresses for saved
876 registers. Most of the work is done in mn10200_analyze_prologue().
878 Note that when we are called for the last frame (currently active frame),
879 that fi->pc and fi->frame will already be setup. However, fi->frame will
880 be valid only if this routine uses FP. For previous frames, fi-frame will
881 always be correct. mn10200_analyze_prologue will fix fi->frame if
884 We can be called with the PC in the call dummy under two circumstances.
885 First, during normal backtracing, second, while figuring out the frame
886 pointer just prior to calling the target function (see run_stack_dummy). */
889 mn10200_init_extra_frame_info (fi
)
890 struct frame_info
*fi
;
893 fi
->pc
= FRAME_SAVED_PC (fi
->next
);
895 memset (fi
->fsr
.regs
, '\000', sizeof fi
->fsr
.regs
);
899 mn10200_analyze_prologue (fi
, 0);
903 _initialize_mn10200_tdep ()
905 tm_print_insn
= print_insn_mn10200
;