1: \ disassembler in forth for alpha
2:
3: \ Copyright (C) 1999,2000 Free Software Foundation, Inc.
4:
5: \ This file is part of Gforth.
6:
7: \ Gforth is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
9: \ as published by the Free Software Foundation; either version 2
10: \ of the License, or (at your option) any later version.
11:
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
16:
17: \ You should have received a copy of the GNU General Public License
18: \ along with this program; if not, write to the Free Software
19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20:
21: \ contributed by Bernd Thallner
22:
23: \ util
24:
25: \ require asm.fs
26:
27: \ : h@ ( addr -- n ) \ 32 bit fetch
28: \ dup dup aligned = if
29: \ @
30: \ $00000000ffffffff and
31: \ else
32: \ 4 - @
33: \ $20 rshift
34: \ endif
35: \ ;
36:
37: also assembler
38: vocabulary disassembler
39: get-current
40: also disassembler definitions
41:
42: create string_table
43: 1000 allot
44:
45: \ makes an table entry with following data structure
46: \ 64 start address in string_table 48 strlen 32 format (cOpc, cBra, cF-P, cMem, cMfc, cMbr, cOpr, cPcd) 0
47:
48: : mktbentry, { start format straddr strlen -- start } \ make table entry
49: straddr string_table start + strlen cmove
50: start 48 lshift
51: strlen 32 lshift or
52: format or
53: ,
54: start strlen +
55: ;
56:
57: \ prints the string from stringtable
58: \ table_entry = 64 start address in string_table 48 strlen 32 unused 0
59:
60: : print_string ( table_entry -- ) \ print string entry
61: dup
62: 48 rshift string_table +
63: swap
64: 32 rshift $000000000000ffff and
65: type
66: ;
67:
68: \ Opr tab0 opcode 10.xxx
69: \ Opr tab1 opcode 11.xxx
70: \ Opr tab2 opcode 12.xxx
71: \ Opr tab3 opcode 13.xxx
72:
73: \ F-P tab0 opcode 15.xxx
74: \ F-P tab1 opcode 16.xxx
75: \ F-P tab2 opcode 17.xxx
76:
77: : tab0 2* 2* ;
78: : tab1 2* 2* 1 + ;
79: : tab2 2* 2* 2 + ;
80: : tab3 2* 2* 3 + ;
81:
82: 0 \ string_table offset
83:
84: create Opr_list
85:
86: $00 tab0 s" addl" mktbentry,
87: $40 tab0 s" addlv" mktbentry,
88: $20 tab0 s" addq" mktbentry,
89: $60 tab0 s" addqv" mktbentry,
90: $0f tab0 s" cmpbge" mktbentry,
91: $2d tab0 s" cmpeq" mktbentry,
92: $6d tab0 s" cmple" mktbentry,
93: $4d tab0 s" cmplt" mktbentry,
94: $3d tab0 s" cmpule" mktbentry,
95: $1d tab0 s" cmpult" mktbentry,
96: $02 tab0 s" s4addl" mktbentry,
97: $22 tab0 s" s4addq" mktbentry,
98: $0b tab0 s" s4subl" mktbentry,
99: $2b tab0 s" s4subq" mktbentry,
100: $12 tab0 s" s8addl" mktbentry,
101: $32 tab0 s" s8addq" mktbentry,
102: $1b tab0 s" s8ubl" mktbentry,
103: $3b tab0 s" s8ubq" mktbentry,
104: $09 tab0 s" subl" mktbentry,
105: $49 tab0 s" sublv" mktbentry,
106: $29 tab0 s" subq" mktbentry,
107: $69 tab0 s" subqv" mktbentry,
108:
109: $00 tab1 s" and" mktbentry,
110: $08 tab1 s" bic" mktbentry,
111: $20 tab1 s" bis" mktbentry,
112: $24 tab1 s" cmoveq" mktbentry,
113: $46 tab1 s" cmovge" mktbentry,
114: $66 tab1 s" cmovgt" mktbentry,
115: $16 tab1 s" cmovlbc" mktbentry,
116: $14 tab1 s" cmovlbs" mktbentry,
117: $64 tab1 s" cmovle" mktbentry,
118: $44 tab1 s" cmovlt" mktbentry,
119: $26 tab1 s" cmovne" mktbentry,
120: $48 tab1 s" eqv" mktbentry,
121: $28 tab1 s" ornot" mktbentry,
122: $40 tab1 s" xor" mktbentry,
123:
124: $06 tab2 s" extbl" mktbentry,
125: $6a tab2 s" extlh" mktbentry,
126: $26 tab2 s" extll" mktbentry,
127: $7a tab2 s" extqh" mktbentry,
128: $36 tab2 s" extql" mktbentry,
129: $5a tab2 s" extwh" mktbentry,
130: $16 tab2 s" extwl" mktbentry,
131: $0b tab2 s" insbl" mktbentry,
132: $67 tab2 s" inslh" mktbentry,
133: $2b tab2 s" insll" mktbentry,
134: $77 tab2 s" insqh" mktbentry,
135: $3b tab2 s" insql" mktbentry,
136: $57 tab2 s" inswh" mktbentry,
137: $1b tab2 s" inswl" mktbentry,
138: $02 tab2 s" mskbl" mktbentry,
139: $62 tab2 s" msklh" mktbentry,
140: $22 tab2 s" mskll" mktbentry,
141: $72 tab2 s" mskqh" mktbentry,
142: $32 tab2 s" mskql" mktbentry,
143: $52 tab2 s" mskwh" mktbentry,
144: $12 tab2 s" mskwl" mktbentry,
145: $39 tab2 s" sll" mktbentry,
146: $3c tab2 s" sra" mktbentry,
147: $34 tab2 s" srl" mktbentry,
148: $30 tab2 s" zap" mktbentry,
149: $31 tab2 s" zapnot" mktbentry,
150:
151: $00 tab3 s" mull" mktbentry,
152: $20 tab3 s" mullq" mktbentry,
153: $30 tab3 s" umulh" mktbentry,
154: $40 tab3 s" mullv" mktbentry,
155: $60 tab3 s" mullqv" mktbentry,
156:
157: create Mfc_list
158:
159: $0000 s" trapb" mktbentry,
160: $0400 s" excb" mktbentry,
161: $4000 s" mb" mktbentry,
162: $4400 s" wmb" mktbentry,
163: $8000 s" fetch" mktbentry,
164: $a000 s" fetch_m" mktbentry,
165: $c000 s" rpcc" mktbentry,
166: $e000 s" rc" mktbentry,
167: $f000 s" rs" mktbentry,
168:
169: create Mbr_table
170:
171: ( 00 ) 0 s" jmp" mktbentry,
172: ( 01 ) 0 s" jsr" mktbentry,
173: ( 02 ) 0 s" ret" mktbentry,
174: ( 03 ) 0 s" jsr_coroutine" mktbentry,
175:
176: create F-P_list
177:
178: $080 tab0 s" addf" mktbentry,
179: $081 tab0 s" subf" mktbentry,
180: $082 tab0 s" mulf" mktbentry,
181: $083 tab0 s" divf" mktbentry,
182: $09e tab0 s" cvtdg" mktbentry,
183: $0a0 tab0 s" addg" mktbentry,
184: $0a1 tab0 s" subg" mktbentry,
185: $0a2 tab0 s" mulg" mktbentry,
186: $0a3 tab0 s" divg" mktbentry,
187: $0a5 tab0 s" cmpgeq" mktbentry,
188: $0a6 tab0 s" cmpglt" mktbentry,
189: $0a7 tab0 s" cmpgle" mktbentry,
190: $0ac tab0 s" cvtgf" mktbentry,
191: $0ad tab0 s" cvtgd" mktbentry,
192: $0af tab0 s" cvtgq" mktbentry,
193: $0bc tab0 s" cvtqf" mktbentry,
194: $0be tab0 s" cvtqg" mktbentry,
195:
196: $080 tab1 s" adds" mktbentry,
197: $081 tab1 s" subs" mktbentry,
198: $082 tab1 s" mulls" mktbentry,
199: $083 tab1 s" divs" mktbentry,
200: $0a0 tab1 s" addt" mktbentry,
201: $0a1 tab1 s" subt" mktbentry,
202: $0a2 tab1 s" mullt" mktbentry,
203: $0a3 tab1 s" divt" mktbentry,
204: $0a4 tab1 s" cmptun" mktbentry,
205: $0a5 tab1 s" cmpteq" mktbentry,
206: $0a6 tab1 s" cmptlt" mktbentry,
207: $0a7 tab1 s" cmptle" mktbentry,
208: $0ac tab1 s" cvtts" mktbentry,
209: $0af tab1 s" cvttq" mktbentry,
210: $0bc tab1 s" cvtqs" mktbentry,
211: $0be tab1 s" cvtqt" mktbentry,
212: $2ac tab1 s" cvtst" mktbentry,
213:
214: $010 tab2 s" cvtlq" mktbentry,
215: $020 tab2 s" cpys" mktbentry,
216: $021 tab2 s" cpysn" mktbentry,
217: $022 tab2 s" cpyse" mktbentry,
218: $024 tab2 s" mt_fpcr" mktbentry,
219: $025 tab2 s" mf_fpcr" mktbentry,
220: $02a tab2 s" fcmoveq" mktbentry,
221: $02b tab2 s" fcmovne" mktbentry,
222: $02c tab2 s" fcmovlt" mktbentry,
223: $02d tab2 s" fcmovge" mktbentry,
224: $02e tab2 s" fcmovle" mktbentry,
225: $02f tab2 s" fcmovgt" mktbentry,
226: $030 tab2 s" cvtql" mktbentry,
227: $130 tab2 s" cvtqlv" mktbentry,
228: $530 tab2 s" cvtqlsv" mktbentry,
229:
230: create register_table
231:
232: ( 00 ) 0 s" v0" mktbentry,
233: ( 01 ) 0 s" t0" mktbentry,
234: ( 02 ) 0 s" t1" mktbentry,
235: ( 03 ) 0 s" t2" mktbentry,
236: ( 04 ) 0 s" t3" mktbentry,
237: ( 05 ) 0 s" t4" mktbentry,
238: ( 06 ) 0 s" t5" mktbentry,
239: ( 07 ) 0 s" t6" mktbentry,
240: ( 08 ) 0 s" t7" mktbentry,
241: ( 09 ) 0 s" s0" mktbentry,
242: ( 0a ) 0 s" s1" mktbentry,
243: ( 0b ) 0 s" s2" mktbentry,
244: ( 0c ) 0 s" s3" mktbentry,
245: ( 0d ) 0 s" s4" mktbentry,
246: ( 0e ) 0 s" s5" mktbentry,
247: ( 0f ) 0 s" fp" mktbentry,
248: ( 10 ) 0 s" a0" mktbentry,
249: ( 11 ) 0 s" a1" mktbentry,
250: ( 12 ) 0 s" a2" mktbentry,
251: ( 13 ) 0 s" a3" mktbentry,
252: ( 14 ) 0 s" a4" mktbentry,
253: ( 15 ) 0 s" a5" mktbentry,
254: ( 16 ) 0 s" t8" mktbentry,
255: ( 17 ) 0 s" t9" mktbentry,
256: ( 18 ) 0 s" t10" mktbentry,
257: ( 19 ) 0 s" t11" mktbentry,
258: ( 1a ) 0 s" ra" mktbentry,
259: ( 1b ) 0 s" t12" mktbentry,
260: ( 1c ) 0 s" at" mktbentry,
261: ( 1d ) 0 s" gp" mktbentry,
262: ( 1e ) 0 s" sp" mktbentry,
263: ( 1f ) 0 s" zero" mktbentry,
264:
265: defer decode_register
266:
267: : decode_register_symb ( register -- )
268: cells register_table +
269: @ print_string $20 emit
270: ;
271:
272: : decode_register_number ( register -- )
273: .
274: ;
275:
276: ' decode_register_number is decode_register
277: \ ' decode_register_symb is decode_register
278:
279: create decode_code
280:
281: : decode_Opc ( instruction tbentry -- )
282: print_string drop
283: ;
284:
285: : decode_Bra ( addr instruction tbentry -- addr )
286: swap
287: dup $03e00000 and 21 rshift decode_register
288: $001fffff and 2* 2* 2 pick + 4 + hex.
289: print_string
290: ;
291:
292: : decode_F-P ( instruction tbentry -- )
293: drop
294: dup $03e00000 and 21 rshift decode_register
295: dup $001f0000 and 16 rshift decode_register
296: dup $0000001f and decode_register
297: dup 26 rshift $15 -
298: swap $0000fff0 and 3 rshift or F-P_list
299: begin
300: dup @ rot swap over over $00000000ffffffff and
301: = if print_string swap drop register_table swap else drop endif
302: swap 1 cells + dup register_table >
303: until
304: drop drop
305: ;
306:
307: : decode_Mem ( instruction tbentry -- )
308: swap
309: dup $03e00000 and 21 rshift decode_register
310: dup $0000ffff and dup 15 rshift negate 15 lshift or .
311: $001f0000 and 16 rshift decode_register
312: print_string
313: ;
314:
315: : decode_Mfc ( instruction tbentry -- )
316: drop
317: dup $03e00000 and 21 rshift decode_register
318: dup $001f0000 and 16 rshift decode_register
319: $0000ffff and Mfc_list
320: begin
321: dup @ rot swap over over $00000000ffffffff and
322: = if print_string drop drop register_table 1 else drop endif
323: swap 1 cells + dup F-P_list >
324: until
325: drop drop
326: ;
327:
328: : decode_Mbr ( instruction tbentry -- )
329: drop
330: dup $03e00000 and 21 rshift decode_register
331: dup $001f0000 and 16 rshift decode_register
332: dup $00003fff and decode_register
333: $0000c000 and 14 rshift cells Mbr_table +
334: @ print_string
335: ;
336:
337: : decode_Opr ( instruction tbentry -- )
338: drop
339: dup $03e00000 and 21 rshift decode_register
340: dup dup $00001000 and $00001000
341: = if
342: $001fe000 and 13 rshift . -1
343: else
344: $001f0000 and 16 rshift decode_register 0
345: endif
346: swap dup $0000001f and decode_register
347: dup 26 rshift $10 -
348: swap $00000fe0 and 3 rshift or Opr_list
349: begin
350: dup @ rot swap over over $00000000ffffffff and
351: = if print_string swap drop register_table swap else drop endif
352: swap 1 cells + dup Mfc_list >
353: until
354: drop drop if $23 emit endif
355: ;
356:
357: : decode_Pcd ( instruction tbentry -- )
358: swap
359: $0000000003ffffff and .
360: print_string
361: ;
362:
363: \ format
364:
365: ' decode_Opc decode_code - constant cOpc
366: ' decode_Bra decode_code - constant cBra
367: ' decode_F-P decode_code - constant cF-P
368: ' decode_Mem decode_code - constant cMem
369: ' decode_Mfc decode_code - constant cMfc
370: ' decode_Mbr decode_code - constant cMbr
371: ' decode_Opr decode_code - constant cOpr
372: ' decode_Pcd decode_code - constant cPcd
373:
374: create opcode_table
375:
376: ( 00 ) cPcd s" call_pal" mktbentry,
377: ( 01 ) cOpc s" opc01" mktbentry,
378: ( 02 ) cOpc s" opc02" mktbentry,
379: ( 03 ) cOpc s" opc03" mktbentry,
380: ( 04 ) cOpc s" opc04" mktbentry,
381: ( 05 ) cOpc s" opc05" mktbentry,
382: ( 06 ) cOpc s" opc06" mktbentry,
383: ( 07 ) cOpc s" opc07" mktbentry,
384: ( 08 ) cMem s" lda" mktbentry,
385: ( 09 ) cMem s" ldah" mktbentry,
386: ( 0a ) cOpc s" opc0a" mktbentry,
387: ( 0b ) cMem s" ldq_u" mktbentry,
388: ( 0c ) cOpc s" opc0c" mktbentry,
389: ( 0d ) cOpc s" opc0d" mktbentry,
390: ( 0e ) cOpc s" opc0e" mktbentry,
391: ( 0f ) cMem s" stq_u" mktbentry,
392: ( 10 ) cOpr s" " mktbentry,
393: ( 11 ) cOpr s" " mktbentry,
394: ( 12 ) cOpr s" " mktbentry,
395: ( 13 ) cOpr s" " mktbentry,
396: ( 14 ) cOpc s" opc14" mktbentry,
397: ( 15 ) cF-P s" " mktbentry,
398: ( 16 ) cF-P s" " mktbentry,
399: ( 17 ) cF-P s" " mktbentry,
400: ( 18 ) cMfc s" " mktbentry,
401: ( 19 ) cOpc s" pal19" mktbentry,
402: ( 1a ) cMbr s" " mktbentry,
403: ( 1b ) cOpc s" pal1b" mktbentry,
404: ( 1c ) cOpc s" opc1c" mktbentry,
405: ( 1d ) cOpc s" pal1d" mktbentry,
406: ( 1e ) cOpc s" pal1e" mktbentry,
407: ( 1f ) cOpc s" pal1f" mktbentry,
408: ( 20 ) cMem s" ldf" mktbentry,
409: ( 21 ) cMem s" ldg" mktbentry,
410: ( 22 ) cMem s" lds" mktbentry,
411: ( 23 ) cMem s" ldt" mktbentry,
412: ( 24 ) cMem s" stf" mktbentry,
413: ( 25 ) cMem s" stg" mktbentry,
414: ( 26 ) cMem s" sts" mktbentry,
415: ( 27 ) cMem s" stt" mktbentry,
416: ( 28 ) cMem s" ldl" mktbentry,
417: ( 29 ) cMem s" ldq" mktbentry,
418: ( 2a ) cMem s" ldl_l" mktbentry,
419: ( 2b ) cMem s" ldq_l" mktbentry,
420: ( 2c ) cMem s" stl" mktbentry,
421: ( 2d ) cMem s" stq" mktbentry,
422: ( 2e ) cMem s" stl_c" mktbentry,
423: ( 2f ) cMem s" stq_c" mktbentry,
424: ( 30 ) cBra s" br" mktbentry,
425: ( 31 ) cBra s" fbeq" mktbentry,
426: ( 32 ) cBra s" fblt" mktbentry,
427: ( 33 ) cBra s" fble" mktbentry,
428: ( 34 ) cBra s" bsr" mktbentry,
429: ( 35 ) cBra s" fbne" mktbentry,
430: ( 36 ) cBra s" fbge" mktbentry,
431: ( 37 ) cBra s" fbgt" mktbentry,
432: ( 38 ) cBra s" blbc" mktbentry,
433: ( 39 ) cBra s" beq" mktbentry,
434: ( 3a ) cBra s" blt" mktbentry,
435: ( 3b ) cBra s" ble" mktbentry,
436: ( 3c ) cBra s" blbs" mktbentry,
437: ( 3d ) cBra s" bne" mktbentry,
438: ( 3e ) cBra s" bge" mktbentry,
439: ( 3f ) cBra s" bgt" mktbentry,
440:
441: drop \ string_table end
442:
443: set-current
444:
445: : disasm-inst ( addr n -- addr ) \ instruction decoder
446: dup $fc000000 and
447: 26 rshift cells
448: opcode_table +
449: @ dup $00000000ffffffff and
450: decode_code + execute
451: $2c emit cr
452: ;
453:
454: : disasm ( addr u -- ) \ gforth
455: \G disassemble u aus starting at addr
456: cr bounds
457: u+do
458: ." ( " i hex. ." ) "
459: i i h@ disasm-inst drop
460: 4
461: +loop ;
462:
463: ' disasm is discode
464:
465: previous previous
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