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252b5132 | 1 | /* Disassemble V850 instructions. |
d83c6548 | 2 | Copyright 1996, 1997, 1998, 2000, 2001 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 2 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, write to the Free Software | |
16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
17 | ||
18 | ||
19 | #include <stdio.h> | |
20 | ||
0d8dfecf | 21 | #include "sysdep.h" |
252b5132 RH |
22 | #include "opcode/v850.h" |
23 | #include "dis-asm.h" | |
24 | #include "opintl.h" | |
25 | ||
26 | static const char *const v850_reg_names[] = | |
27 | { "r0", "r1", "r2", "sp", "gp", "r5", "r6", "r7", | |
28 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
29 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
30 | "r24", "r25", "r26", "r27", "r28", "r29", "ep", "lp" }; | |
31 | ||
32 | static const char *const v850_sreg_names[] = | |
33 | { "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7", | |
34 | "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15", | |
35 | "ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23", | |
36 | "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31", | |
37 | "sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23", | |
38 | "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31" }; | |
39 | ||
40 | static const char *const v850_cc_names[] = | |
41 | { "v", "c/l", "z", "nh", "s/n", "t", "lt", "le", | |
42 | "nv", "nc/nl", "nz", "h", "ns/p", "sa", "ge", "gt" }; | |
43 | ||
d83c6548 AJ |
44 | static int disassemble |
45 | PARAMS ((bfd_vma, struct disassemble_info *, unsigned long)); | |
46 | ||
252b5132 RH |
47 | static int |
48 | disassemble (memaddr, info, insn) | |
49 | bfd_vma memaddr; | |
50 | struct disassemble_info *info; | |
51 | unsigned long insn; | |
52 | { | |
53 | struct v850_opcode * op = (struct v850_opcode *)v850_opcodes; | |
54 | const struct v850_operand * operand; | |
55 | int match = 0; | |
56 | int short_op = ((insn & 0x0600) != 0x0600); | |
57 | int bytes_read; | |
58 | int target_processor; | |
59 | ||
60 | /* Special case: 32 bit MOV */ | |
61 | if ((insn & 0xffe0) == 0x0620) | |
62 | short_op = true; | |
63 | ||
64 | bytes_read = short_op ? 2 : 4; | |
65 | ||
66 | /* If this is a two byte insn, then mask off the high bits. */ | |
67 | if (short_op) | |
68 | insn &= 0xffff; | |
69 | ||
70 | switch (info->mach) | |
71 | { | |
72 | case 0: | |
73 | default: | |
74 | target_processor = PROCESSOR_V850; | |
75 | break; | |
76 | ||
77 | case bfd_mach_v850e: | |
78 | target_processor = PROCESSOR_V850E; | |
79 | break; | |
252b5132 RH |
80 | } |
81 | ||
82 | /* Find the opcode. */ | |
83 | while (op->name) | |
84 | { | |
85 | if ((op->mask & insn) == op->opcode | |
86 | && (op->processors & target_processor)) | |
87 | { | |
88 | const unsigned char * opindex_ptr; | |
89 | unsigned int opnum; | |
90 | unsigned int memop; | |
91 | ||
92 | match = 1; | |
93 | (*info->fprintf_func) (info->stream, "%s\t", op->name); | |
94 | /*fprintf (stderr, "match: mask: %x insn: %x, opcode: %x, name: %s\n", op->mask, insn, op->opcode, op->name );*/ | |
95 | ||
96 | memop = op->memop; | |
97 | /* Now print the operands. | |
98 | ||
99 | MEMOP is the operand number at which a memory | |
100 | address specification starts, or zero if this | |
101 | instruction has no memory addresses. | |
102 | ||
103 | A memory address is always two arguments. | |
104 | ||
105 | This information allows us to determine when to | |
106 | insert commas into the output stream as well as | |
107 | when to insert disp[reg] expressions onto the | |
108 | output stream. */ | |
109 | ||
110 | for (opindex_ptr = op->operands, opnum = 1; | |
111 | *opindex_ptr != 0; | |
112 | opindex_ptr++, opnum++) | |
113 | { | |
114 | long value; | |
115 | int flag; | |
116 | int status; | |
117 | bfd_byte buffer[ 4 ]; | |
118 | ||
119 | operand = &v850_operands[*opindex_ptr]; | |
120 | ||
121 | if (operand->extract) | |
122 | value = (operand->extract) (insn, 0); | |
123 | else | |
124 | { | |
125 | if (operand->bits == -1) | |
126 | value = (insn & operand->shift); | |
127 | else | |
128 | value = (insn >> operand->shift) & ((1 << operand->bits) - 1); | |
129 | ||
130 | if (operand->flags & V850_OPERAND_SIGNED) | |
131 | value = ((long)(value << (32 - operand->bits)) | |
132 | >> (32 - operand->bits)); | |
133 | } | |
134 | ||
135 | /* The first operand is always output without any | |
136 | special handling. | |
137 | ||
138 | For the following arguments: | |
139 | ||
140 | If memop && opnum == memop + 1, then we need '[' since | |
141 | we're about to output the register used in a memory | |
142 | reference. | |
143 | ||
144 | If memop && opnum == memop + 2, then we need ']' since | |
145 | we just finished the register in a memory reference. We | |
146 | also need a ',' before this operand. | |
147 | ||
148 | Else we just need a comma. | |
149 | ||
150 | We may need to output a trailing ']' if the last operand | |
151 | in an instruction is the register for a memory address. | |
152 | ||
153 | The exception (and there's always an exception) is the | |
154 | "jmp" insn which needs square brackets around it's only | |
155 | register argument. */ | |
156 | ||
157 | if (memop && opnum == memop + 1) info->fprintf_func (info->stream, "["); | |
158 | else if (memop && opnum == memop + 2) info->fprintf_func (info->stream, "],"); | |
159 | else if (memop == 1 && opnum == 1 | |
160 | && (operand->flags & V850_OPERAND_REG)) | |
161 | info->fprintf_func (info->stream, "["); | |
162 | else if (opnum > 1) info->fprintf_func (info->stream, ", "); | |
163 | ||
164 | /* extract the flags, ignorng ones which do not effect disassembly output. */ | |
165 | flag = operand->flags; | |
166 | flag &= ~ V850_OPERAND_SIGNED; | |
167 | flag &= ~ V850_OPERAND_RELAX; | |
168 | flag &= - flag; | |
169 | ||
170 | switch (flag) | |
171 | { | |
172 | case V850_OPERAND_REG: info->fprintf_func (info->stream, "%s", v850_reg_names[value]); break; | |
173 | case V850_OPERAND_SRG: info->fprintf_func (info->stream, "%s", v850_sreg_names[value]); break; | |
174 | case V850_OPERAND_CC: info->fprintf_func (info->stream, "%s", v850_cc_names[value]); break; | |
175 | case V850_OPERAND_EP: info->fprintf_func (info->stream, "ep"); break; | |
176 | default: info->fprintf_func (info->stream, "%d", value); break; | |
177 | case V850_OPERAND_DISP: | |
178 | { | |
179 | bfd_vma addr = value + memaddr; | |
180 | ||
181 | /* On the v850 the top 8 bits of an address are used by an overlay manager. | |
182 | Thus it may happen that when we are looking for a symbol to match | |
183 | against an address with some of its top bits set, the search fails to | |
184 | turn up an exact match. In this case we try to find an exact match | |
185 | against a symbol in the lower address space, and if we find one, we | |
186 | use that address. We only do this for JARL instructions however, as | |
187 | we do not want to misinterpret branch instructions. */ | |
188 | if (operand->bits == 22) | |
189 | { | |
190 | if ( ! info->symbol_at_address_func (addr, info) | |
191 | && ((addr & 0xFF000000) != 0) | |
192 | && info->symbol_at_address_func (addr & 0x00FFFFFF, info)) | |
193 | { | |
194 | addr &= 0x00FFFFFF; | |
195 | } | |
196 | } | |
197 | info->print_address_func (addr, info); | |
198 | break; | |
199 | } | |
200 | ||
201 | case V850E_PUSH_POP: | |
202 | { | |
203 | static int list12_regs[32] = { 30, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 31, 29, 28, 23, 22, 21, 20, 27, 26, 25, 24 }; | |
204 | static int list18_h_regs[32] = { 19, 18, 17, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 30, 31, 29, 28, 23, 22, 21, 20, 27, 26, 25, 24 }; | |
205 | static int list18_l_regs[32] = { 3, 2, 1, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 14, 15, 13, 12, 7, 6, 5, 4, 11, 10, 9, 8 }; | |
206 | int * regs; | |
207 | int i; | |
208 | unsigned long int mask = 0; | |
209 | int pc = false; | |
210 | int sr = false; | |
211 | ||
212 | ||
213 | switch (operand->shift) | |
214 | { | |
215 | case 0xffe00001: regs = list12_regs; break; | |
216 | case 0xfff8000f: regs = list18_h_regs; break; | |
217 | case 0xfff8001f: regs = list18_l_regs; value &= ~0x10; break; /* Do not include magic bit */ | |
218 | default: | |
219 | /* xgettext:c-format */ | |
220 | fprintf (stderr, _("unknown operand shift: %x\n"), operand->shift ); | |
221 | abort(); | |
222 | } | |
223 | ||
224 | for (i = 0; i < 32; i++) | |
225 | { | |
226 | if (value & (1 << i)) | |
227 | { | |
228 | switch (regs[ i ]) | |
229 | { | |
230 | default: mask |= (1 << regs[ i ]); break; | |
231 | /* xgettext:c-format */ | |
232 | case 0: fprintf (stderr, _("unknown pop reg: %d\n"), i ); abort(); | |
233 | case -1: pc = true; break; | |
234 | case -2: sr = true; break; | |
235 | } | |
236 | } | |
237 | } | |
238 | ||
239 | info->fprintf_func (info->stream, "{"); | |
240 | ||
241 | if (mask || pc || sr) | |
242 | { | |
243 | if (mask) | |
244 | { | |
245 | unsigned int bit; | |
246 | int shown_one = false; | |
247 | ||
248 | for (bit = 0; bit < 32; bit++) | |
249 | if (mask & (1 << bit)) | |
250 | { | |
251 | unsigned long int first = bit; | |
252 | unsigned long int last; | |
253 | ||
254 | if (shown_one) | |
255 | info->fprintf_func (info->stream, ", "); | |
256 | else | |
257 | shown_one = true; | |
258 | ||
259 | info->fprintf_func (info->stream, v850_reg_names[first]); | |
260 | ||
261 | for (bit++; bit < 32; bit++) | |
262 | if ((mask & (1 << bit)) == 0) | |
263 | break; | |
264 | ||
265 | last = bit; | |
266 | ||
267 | if (last > first + 1) | |
268 | { | |
269 | info->fprintf_func (info->stream, " - %s", v850_reg_names[ last - 1 ]); | |
270 | } | |
271 | } | |
272 | } | |
273 | ||
274 | if (pc) | |
275 | info->fprintf_func (info->stream, "%sPC", mask ? ", " : ""); | |
276 | if (sr) | |
277 | info->fprintf_func (info->stream, "%sSR", (mask || pc) ? ", " : ""); | |
278 | } | |
279 | ||
280 | info->fprintf_func (info->stream, "}"); | |
281 | } | |
282 | break; | |
283 | ||
284 | case V850E_IMMEDIATE16: | |
285 | status = info->read_memory_func (memaddr + bytes_read, buffer, 2, info); | |
286 | if (status == 0) | |
287 | { | |
288 | bytes_read += 2; | |
289 | value = bfd_getl16 (buffer); | |
290 | ||
291 | /* If this is a DISPOSE instruction with ff set to 0x10, then shift value up by 16. */ | |
292 | if ((insn & 0x001fffc0) == 0x00130780) | |
293 | value <<= 16; | |
294 | ||
295 | info->fprintf_func (info->stream, "0x%x", value); | |
296 | } | |
297 | else | |
298 | { | |
299 | info->memory_error_func (status, memaddr + bytes_read, info); | |
300 | } | |
301 | break; | |
302 | ||
303 | case V850E_IMMEDIATE32: | |
304 | status = info->read_memory_func (memaddr + bytes_read, buffer, 4, info); | |
305 | if (status == 0) | |
306 | { | |
307 | bytes_read += 4; | |
308 | value = bfd_getl32 (buffer); | |
309 | info->fprintf_func (info->stream, "0x%lx", value); | |
310 | } | |
311 | else | |
312 | { | |
313 | info->memory_error_func (status, memaddr + bytes_read, info); | |
314 | } | |
315 | break; | |
316 | } | |
317 | ||
318 | /* Handle jmp correctly. */ | |
319 | if (memop == 1 && opnum == 1 | |
320 | && ((operand->flags & V850_OPERAND_REG) != 0)) | |
321 | (*info->fprintf_func) (info->stream, "]"); | |
322 | } | |
323 | ||
324 | /* Close any square bracket we left open. */ | |
325 | if (memop && opnum == memop + 2) | |
326 | (*info->fprintf_func) (info->stream, "]"); | |
327 | ||
328 | /* All done. */ | |
329 | break; | |
330 | } | |
331 | op++; | |
332 | } | |
333 | ||
334 | if (!match) | |
335 | { | |
336 | if (short_op) | |
337 | info->fprintf_func (info->stream, ".short\t0x%04x", insn); | |
338 | else | |
339 | info->fprintf_func (info->stream, ".long\t0x%08x", insn); | |
340 | } | |
341 | ||
342 | return bytes_read; | |
343 | } | |
344 | ||
345 | int | |
346 | print_insn_v850 (memaddr, info) | |
347 | bfd_vma memaddr; | |
348 | struct disassemble_info * info; | |
349 | { | |
350 | int status; | |
351 | bfd_byte buffer[ 4 ]; | |
352 | unsigned long insn = 0; | |
353 | ||
354 | /* First figure out how big the opcode is. */ | |
355 | ||
356 | status = info->read_memory_func (memaddr, buffer, 2, info); | |
357 | if (status == 0) | |
358 | { | |
359 | insn = bfd_getl16 (buffer); | |
360 | ||
361 | if ( (insn & 0x0600) == 0x0600 | |
362 | && (insn & 0xffe0) != 0x0620) | |
363 | { | |
364 | /* If this is a 4 byte insn, read 4 bytes of stuff. */ | |
365 | status = info->read_memory_func (memaddr, buffer, 4, info); | |
366 | ||
367 | if (status == 0) | |
368 | insn = bfd_getl32 (buffer); | |
369 | } | |
370 | } | |
371 | ||
372 | if (status != 0) | |
373 | { | |
374 | info->memory_error_func (status, memaddr, info); | |
375 | return -1; | |
376 | } | |
377 | ||
378 | /* Make sure we tell our caller how many bytes we consumed. */ | |
379 | return disassemble (memaddr, info, insn); | |
380 | } |