1 /* Disassemble AVR instructions.
2 Copyright (C) 1999, 2000 Free Software Foundation, Inc.
4 Contributed by Denis Chertykov <denisc@overta.ru>
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. */
25 typedef unsigned char u8;
26 typedef unsigned short u16;
27 typedef unsigned long u32;
29 #define IFMASK(a,b) ((opcode & (a)) == (b))
31 static char* SREG_flags = "CZNVSHTI";
32 static char* sect94[] = {"COM","NEG","SWAP","INC",0,"ASR","LSR","ROR",
34 static char* sect98[] = {"CBI","SBIC","SBI","SBIS"};
35 static char* branchs[] = {
36 "BRCS","BREQ","BRMI","BRVS",
37 "BRLT","BRHS","BRTS","BRIE",
38 "BRCC","BRNE","BRPL","BRVC",
39 "BRGE","BRHC","BRTC","BRID"
42 static char* last4[] = {"BLD","BST","SBRC","SBRS"};
45 static void dispLDD PARAMS ((u16, char *));
48 dispLDD (opcode, dest)
52 opcode = (((opcode & 0x2000) >> 8) | ((opcode & 0x0c00) >> 7)
54 sprintf(dest, "%d", opcode);
58 static void regPP PARAMS ((u16, char *));
65 opcode = ((opcode & 0x0600) >> 5) | (opcode & 0xf);
66 sprintf(dest, "0x%02X", opcode);
70 static void reg50 PARAMS ((u16, char *));
77 opcode = (opcode & 0x01f0) >> 4;
78 sprintf(dest, "R%d", opcode);
82 static void reg104 PARAMS ((u16, char *));
89 opcode = (opcode & 0xf) | ((opcode & 0x0200) >> 5);
90 sprintf(dest, "R%d", opcode);
94 static void reg40 PARAMS ((u16, char *));
101 opcode = (opcode & 0xf0) >> 4;
102 sprintf(dest, "R%d", opcode + 16);
106 static void reg20w PARAMS ((u16, char *));
109 reg20w (opcode, dest)
113 opcode = (opcode & 0x30) >> 4;
114 sprintf(dest, "R%d", 24 + opcode * 2);
118 static void reg_fmul_d PARAMS ((u16, char *));
121 reg_fmul_d (opcode, dest)
125 sprintf(dest, "R%d", 16 + ((opcode >> 4) & 7));
129 static void reg_fmul_r PARAMS ((u16, char *));
132 reg_fmul_r (opcode, dest)
136 sprintf(dest, "R%d", 16 + (opcode & 7));
140 static void reg_muls_d PARAMS ((u16, char *));
143 reg_muls_d (opcode, dest)
147 sprintf(dest, "R%d", 16 + ((opcode >> 4) & 0xf));
151 static void reg_muls_r PARAMS ((u16, char *));
154 reg_muls_r (opcode, dest)
158 sprintf(dest, "R%d", 16 + (opcode & 0xf));
162 static void reg_movw_d PARAMS ((u16, char *));
165 reg_movw_d (opcode, dest)
169 sprintf(dest, "R%d", 2 * ((opcode >> 4) & 0xf));
173 static void reg_movw_r PARAMS ((u16, char *));
176 reg_movw_r (opcode, dest)
180 sprintf(dest, "R%d", 2 * (opcode & 0xf));
184 static void lit404 PARAMS ((u16, char *));
187 lit404 (opcode, dest)
191 opcode = ((opcode & 0xf00) >> 4) | (opcode & 0xf);
192 sprintf(dest, "0x%02X", opcode);
196 static void lit204 PARAMS ((u16, char *));
199 lit204 (opcode, dest)
203 opcode = ((opcode & 0xc0) >> 2) | (opcode & 0xf);
204 sprintf(dest, "0x%02X", opcode);
208 static void add0fff PARAMS ((u16, char *, int));
211 add0fff (op, dest, pc)
216 int rel_addr = (((op & 0xfff) ^ 0x800) - 0x800) * 2;
217 sprintf(dest, ".%+-8d ; 0x%06X", rel_addr, pc + 2 + rel_addr);
221 static void add03f8 PARAMS ((u16, char *, int));
224 add03f8 (op, dest, pc)
229 int rel_addr = ((((op >> 3) & 0x7f) ^ 0x40) - 0x40) * 2;
230 sprintf(dest, ".%+-8d ; 0x%06X", rel_addr, pc + 2 + rel_addr);
234 static u16 avrdis_opcode PARAMS ((bfd_vma, disassemble_info *));
237 avrdis_opcode (addr, info)
239 disassemble_info *info;
243 status = info->read_memory_func(addr, buffer, 2, info);
246 info->memory_error_func(status, addr, info);
249 return bfd_getl16 (buffer);
254 print_insn_avr(addr, info)
256 disassemble_info *info;
261 void *stream = info->stream;
262 fprintf_ftype prin = info->fprintf_func;
265 opcode = avrdis_opcode (addr, info);
267 if (IFMASK(0xd000, 0x8000))
277 (*prin) (stream, " STD %c+%s,%s", letter, rr, rd);
279 (*prin) (stream, " LDD %s,%c+%s", rd, letter, rr);
283 switch (opcode & 0xf000)
289 switch (opcode & 0x0c00)
292 switch (opcode & 0x0300)
295 (*prin) (stream, " NOP");
298 reg_movw_d(opcode, rd);
299 reg_movw_r(opcode, rr);
300 (*prin) (stream, " MOVW %s,%s", rd, rr);
303 reg_muls_d(opcode, rd);
304 reg_muls_r(opcode, rr);
305 (*prin) (stream, " MULS %s,%s", rd, rr);
308 reg_fmul_d(opcode, rd);
309 reg_fmul_r(opcode, rr);
311 (*prin) (stream, " MULSU %s,%s", rd, rr);
312 else if (IFMASK(0x88, 8))
313 (*prin) (stream, " FMUL %s,%s", rd, rr);
314 else if (IFMASK(0x88, 0x80))
315 (*prin) (stream, " FMULS %s,%s", rd, rr);
317 (*prin) (stream, " FMULSU %s,%s", rd, rr);
321 (*prin) (stream, " CPC %s,%s", rd, rr);
324 (*prin) (stream, " SBC %s,%s", rd, rr);
327 (*prin) (stream, " ADD %s,%s", rd, rr);
336 switch (opcode & 0x0c00)
339 (*prin) (stream, " CPSE %s,%s", rd, rr);
342 (*prin) (stream, " CP %s,%s", rd, rr);
345 (*prin) (stream, " SUB %s,%s", rd, rr);
348 (*prin) (stream, " ADC %s,%s", rd, rr);
357 switch (opcode & 0x0c00)
360 (*prin) (stream, " AND %s,%s", rd, rr);
363 (*prin) (stream, " EOR %s,%s", rd, rr);
366 (*prin) (stream, " OR %s,%s", rd, rr);
369 (*prin) (stream, " MOV %s,%s", rd, rr);
378 (*prin) (stream, " CPI %s,%s", rd, rr);
385 (*prin) (stream, " SBCI %s,%s", rd, rr);
392 (*prin) (stream, " SUBI %s,%s", rd, rr);
399 (*prin) (stream, " ORI %s,%s", rd, rr);
406 (*prin) (stream, " ANDI %s,%s", rd, rr);
411 switch (opcode & 0x0e00)
416 switch (opcode & 0xf)
420 (*prin) (stream, " LDS %s,0x%04X", rd,
421 avrdis_opcode(addr + 2, info));
426 (*prin) (stream, " LD %s,Z+", rd);
429 (*prin) (stream, " LD %s,-Z", rd);
432 (*prin) (stream, " LPM %s,Z", rd);
435 (*prin) (stream, " LPM %s,Z+", rd);
438 (*prin) (stream, " ELPM %s,Z", rd);
441 (*prin) (stream, " ELPM %s,Z+", rd);
444 (*prin) (stream, " LD %s,Y+", rd);
447 (*prin) (stream, " LD %s,-Y", rd);
450 (*prin) (stream, " LD %s,X", rd);
453 (*prin) (stream, " LD %s,X+", rd);
456 (*prin) (stream, " LD %s,-X", rd);
459 (*prin) (stream, " POP %s", rd);
462 (*prin) (stream, " ????");
470 switch (opcode & 0xf)
474 (*prin) (stream, " STS 0x%04X,%s",
475 avrdis_opcode(addr + 2, info), rd);
480 (*prin) (stream, " ST Z+,%s", rd);
483 (*prin) (stream, " ST -Z,%s", rd);
486 (*prin) (stream, " ST Y+,%s", rd);
489 (*prin) (stream, " ST -Y,%s", rd);
492 (*prin) (stream, " ST X,%s", rd);
495 (*prin) (stream, " ST X+,%s", rd);
498 (*prin) (stream, " ST -X,%s", rd);
501 (*prin) (stream, " PUSH %s", rd);
504 (*prin) (stream, " ????");
511 if (IFMASK(0x020c, 0x000c))
513 u32 k = ((opcode & 0x01f0) >> 3) | (opcode & 1);
514 k = (k << 16) | avrdis_opcode(addr + 2, info);
516 (*prin) (stream, " CALL 0x%06X", k*2);
518 (*prin) (stream, " JMP 0x%06X", k*2);
521 else if (IFMASK(0x010f, 0x0008))
523 int sf = (opcode & 0x70) >> 4;
525 (*prin) (stream, " CL%c", SREG_flags[sf]);
527 (*prin) (stream, " SE%c", SREG_flags[sf]);
529 else if (IFMASK(0x001f, 0x0009))
532 (*prin) (stream, " ICALL");
534 (*prin) (stream, " IJMP");
536 else if (IFMASK(0x001f, 0x0019))
539 (*prin) (stream, " EICALL");
541 (*prin) (stream, " EIJMP");
543 else if (IFMASK(0x010f, 0x0108))
545 if (IFMASK(0x0090, 0x0000))
546 (*prin) (stream, " RET");
547 else if (IFMASK(0x0090, 0x0010))
548 (*prin) (stream, " RETI");
549 else if (IFMASK(0x00e0, 0x0080))
550 (*prin) (stream, " SLEEP");
551 else if (IFMASK(0x00e0, 0x00a0))
552 (*prin) (stream, " WDR");
553 else if (IFMASK(0x00f0, 0x00c0))
554 (*prin) (stream, " LPM");
555 else if (IFMASK(0x00f0, 0x00d0))
556 (*prin) (stream, " ELPM");
557 else if (IFMASK(0x00f0, 0x00e0))
558 (*prin) (stream, " SPM");
559 else if (IFMASK(0x00f0, 0x00f0))
560 (*prin) (stream, " ESPM");
562 (*prin) (stream, " ????");
568 p = sect94[opcode & 0xf];
571 (*prin) (stream, " %-8s%s", p, rd);
582 (*prin) (stream, " SBIW %s,%s", rr, rd);
584 (*prin) (stream, " ADIW %s,%s", rr, rd);
591 (*prin) (stream, " %-8s0x%02X,%d",
592 sect98[(opcode & 0x0300) >> 8],
593 (opcode & 0xf8) >> 3,
601 (*prin) (stream, " MUL %s,%s", rd, rr);
611 (*prin) (stream, " OUT %s,%s", rr, rd);
613 (*prin) (stream, " IN %s,%s", rd, rr);
618 add0fff(opcode, rd, addr);
619 (*prin) (stream, " RJMP %s", rd);
624 add0fff(opcode, rd, addr);
625 (*prin) (stream, " RCALL %s", rd);
632 (*prin) (stream, " LDI %s,%s", rd, rr);
640 (*prin) (stream, " %-8s%s,%d",
641 last4[(opcode & 0x0600) >> 9],
647 add03f8(opcode, rd, addr);
648 p = branchs[((opcode & 0x0400) >> 7) | (opcode & 7)];
649 (*prin) (stream, " %-8s%s", p, rd);