1 /* Disassembler code for Renesas RL78.
2 Copyright (C) 2011-2022 Free Software Foundation, Inc.
3 Contributed by Red Hat.
4 Written by DJ Delorie.
5
6 This file is part of the GNU opcodes library.
7
8 This library 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 3, or (at your option)
11 any later version.
12
13 It is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
17
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., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include <stdio.h>
25
26 #include "bfd.h"
27 #include "elf-bfd.h"
28 #include "disassemble.h"
29 #include "opcode/rl78.h"
30 #include "elf/rl78.h"
31
32 #include <setjmp.h>
33
34 #define DEBUG_SEMANTICS 0
35
36 typedef struct
37 {
38 bfd_vma pc;
39 disassemble_info * dis;
40 } RL78_Data;
41
42 struct private
43 {
44 OPCODES_SIGJMP_BUF bailout;
45 };
46
47 static int
rl78_get_byte(void * vdata)48 rl78_get_byte (void * vdata)
49 {
50 bfd_byte buf[1];
51 RL78_Data *rl78_data = (RL78_Data *) vdata;
52 int status;
53
54 status = rl78_data->dis->read_memory_func (rl78_data->pc,
55 buf,
56 1,
57 rl78_data->dis);
58 if (status != 0)
59 {
60 struct private *priv = (struct private *) rl78_data->dis->private_data;
61
62 rl78_data->dis->memory_error_func (status, rl78_data->pc,
63 rl78_data->dis);
64 OPCODES_SIGLONGJMP (priv->bailout, 1);
65 }
66
67 rl78_data->pc ++;
68 return buf[0];
69 }
70
71 static char const *
72 register_names[] =
73 {
74 "",
75 "x", "a", "c", "b", "e", "d", "l", "h",
76 "ax", "bc", "de", "hl",
77 "sp", "psw", "cs", "es", "pmc", "mem"
78 };
79
80 static char const *
81 condition_names[] =
82 {
83 "t", "f", "c", "nc", "h", "nh", "z", "nz"
84 };
85
86 static int
indirect_type(int t)87 indirect_type (int t)
88 {
89 switch (t)
90 {
91 case RL78_Operand_Indirect:
92 case RL78_Operand_BitIndirect:
93 case RL78_Operand_PostInc:
94 case RL78_Operand_PreDec:
95 return 1;
96 default:
97 return 0;
98 }
99 }
100
101 static int
print_insn_rl78_common(bfd_vma addr,disassemble_info * dis,RL78_Dis_Isa isa)102 print_insn_rl78_common (bfd_vma addr, disassemble_info * dis, RL78_Dis_Isa isa)
103 {
104 int rv;
105 RL78_Data rl78_data;
106 RL78_Opcode_Decoded opcode;
107 const char * s;
108 #if DEBUG_SEMANTICS
109 static char buf[200];
110 #endif
111 struct private priv;
112
113 dis->private_data = &priv;
114 rl78_data.pc = addr;
115 rl78_data.dis = dis;
116
117 if (OPCODES_SIGSETJMP (priv.bailout) != 0)
118 {
119 /* Error return. */
120 return -1;
121 }
122
123 rv = rl78_decode_opcode (addr, &opcode, rl78_get_byte, &rl78_data, isa);
124
125 dis->bytes_per_line = 10;
126
127 #define PR (dis->fprintf_func)
128 #define PS (dis->stream)
129 #define PC(c) PR (PS, "%c", c)
130
131 s = opcode.syntax;
132
133 #if DEBUG_SEMANTICS
134
135 switch (opcode.id)
136 {
137 case RLO_unknown: s = "uknown"; break;
138 case RLO_add: s = "add: %e0%0 += %e1%1"; break;
139 case RLO_addc: s = "addc: %e0%0 += %e1%1 + CY"; break;
140 case RLO_and: s = "and: %e0%0 &= %e1%1"; break;
141 case RLO_branch: s = "branch: pc = %e0%0"; break;
142 case RLO_branch_cond: s = "branch_cond: pc = %e0%0 if %c1 / %e1%1"; break;
143 case RLO_branch_cond_clear: s = "branch_cond_clear: pc = %e0%0 if %c1 / %e1%1, %e1%1 = 0"; break;
144 case RLO_call: s = "call: pc = %e1%0"; break;
145 case RLO_cmp: s = "cmp: %e0%0 - %e1%1"; break;
146 case RLO_mov: s = "mov: %e0%0 = %e1%1"; break;
147 case RLO_or: s = "or: %e0%0 |= %e1%1"; break;
148 case RLO_rol: s = "rol: %e0%0 <<= %e1%1"; break;
149 case RLO_rolc: s = "rol: %e0%0 <<= %e1%1,CY"; break;
150 case RLO_ror: s = "ror: %e0%0 >>= %e1%1"; break;
151 case RLO_rorc: s = "ror: %e0%0 >>= %e1%1,CY"; break;
152 case RLO_sar: s = "sar: %e0%0 >>= %e1%1 signed"; break;
153 case RLO_sel: s = "sel: rb = %1"; break;
154 case RLO_shr: s = "shr: %e0%0 >>= %e1%1 unsigned"; break;
155 case RLO_shl: s = "shl: %e0%0 <<= %e1%1"; break;
156 case RLO_skip: s = "skip: if %c1"; break;
157 case RLO_sub: s = "sub: %e0%0 -= %e1%1"; break;
158 case RLO_subc: s = "subc: %e0%0 -= %e1%1 - CY"; break;
159 case RLO_xch: s = "xch: %e0%0 <-> %e1%1"; break;
160 case RLO_xor: s = "xor: %e0%0 ^= %e1%1"; break;
161 }
162
163 sprintf(buf, "%s%%W%%f\t\033[32m%s\033[0m", s, opcode.syntax);
164 s = buf;
165
166 #endif
167
168 for (; *s; s++)
169 {
170 if (*s != '%')
171 {
172 PC (*s);
173 }
174 else
175 {
176 RL78_Opcode_Operand * oper;
177 int do_hex = 0;
178 int do_addr = 0;
179 int do_es = 0;
180 int do_sfr = 0;
181 int do_cond = 0;
182 int do_bang = 0;
183
184 while (1)
185 {
186 s ++;
187 switch (*s)
188 {
189 case 'x':
190 do_hex = 1;
191 break;
192 case '!':
193 do_bang = 1;
194 break;
195 case 'e':
196 do_es = 1;
197 break;
198 case 'a':
199 do_addr = 1;
200 break;
201 case 's':
202 do_sfr = 1;
203 break;
204 case 'c':
205 do_cond = 1;
206 break;
207 default:
208 goto no_more_modifiers;
209 }
210 }
211 no_more_modifiers:;
212
213 switch (*s)
214 {
215 case '%':
216 PC ('%');
217 break;
218
219 #if DEBUG_SEMANTICS
220
221 case 'W':
222 if (opcode.size == RL78_Word)
223 PR (PS, " \033[33mW\033[0m");
224 break;
225
226 case 'f':
227 if (opcode.flags)
228 {
229 char *comma = "";
230 PR (PS, " \033[35m");
231
232 if (opcode.flags & RL78_PSW_Z)
233 { PR (PS, "Z"); comma = ","; }
234 if (opcode.flags & RL78_PSW_AC)
235 { PR (PS, "%sAC", comma); comma = ","; }
236 if (opcode.flags & RL78_PSW_CY)
237 { PR (PS, "%sCY", comma); comma = ","; }
238 PR (PS, "\033[0m");
239 }
240 break;
241
242 #endif
243
244 case '0':
245 case '1':
246 oper = *s == '0' ? &opcode.op[0] : &opcode.op[1];
247 if (do_es)
248 {
249 if (oper->use_es && indirect_type (oper->type))
250 PR (PS, "es:");
251 }
252
253 if (do_bang)
254 {
255 /* If we are going to display SP by name, we must omit the bang. */
256 if ((oper->type == RL78_Operand_Indirect
257 || oper->type == RL78_Operand_BitIndirect)
258 && oper->reg == RL78_Reg_None
259 && do_sfr
260 && ((oper->addend == 0xffff8 && opcode.size == RL78_Word)
261 || (oper->addend == 0x0fff8 && do_es && opcode.size == RL78_Word)))
262 ;
263 else
264 PC ('!');
265 }
266
267 if (do_cond)
268 {
269 PR (PS, "%s", condition_names[oper->condition]);
270 break;
271 }
272
273 switch (oper->type)
274 {
275 case RL78_Operand_Immediate:
276 if (do_addr)
277 dis->print_address_func (oper->addend, dis);
278 else if (do_hex
279 || oper->addend > 999
280 || oper->addend < -999)
281 PR (PS, "%#x", oper->addend);
282 else
283 PR (PS, "%d", oper->addend);
284 break;
285
286 case RL78_Operand_Register:
287 PR (PS, "%s", register_names[oper->reg]);
288 break;
289
290 case RL78_Operand_Bit:
291 PR (PS, "%s.%d", register_names[oper->reg], oper->bit_number);
292 break;
293
294 case RL78_Operand_Indirect:
295 case RL78_Operand_BitIndirect:
296 switch (oper->reg)
297 {
298 case RL78_Reg_None:
299 if (oper->addend == 0xffffa && do_sfr && opcode.size == RL78_Byte)
300 PR (PS, "psw");
301 else if (oper->addend == 0xffff8 && do_sfr && opcode.size == RL78_Word)
302 PR (PS, "sp");
303 else if (oper->addend == 0x0fff8 && do_sfr && do_es && opcode.size == RL78_Word)
304 PR (PS, "sp");
305 else if (oper->addend == 0xffff8 && do_sfr && opcode.size == RL78_Byte)
306 PR (PS, "spl");
307 else if (oper->addend == 0xffff9 && do_sfr && opcode.size == RL78_Byte)
308 PR (PS, "sph");
309 else if (oper->addend == 0xffffc && do_sfr && opcode.size == RL78_Byte)
310 PR (PS, "cs");
311 else if (oper->addend == 0xffffd && do_sfr && opcode.size == RL78_Byte)
312 PR (PS, "es");
313 else if (oper->addend == 0xffffe && do_sfr && opcode.size == RL78_Byte)
314 PR (PS, "pmc");
315 else if (oper->addend == 0xfffff && do_sfr && opcode.size == RL78_Byte)
316 PR (PS, "mem");
317 else if (oper->addend >= 0xffe20)
318 PR (PS, "%#x", oper->addend);
319 else
320 {
321 int faddr = oper->addend;
322 if (do_es && ! oper->use_es)
323 faddr += 0xf0000;
324 dis->print_address_func (faddr, dis);
325 }
326 break;
327
328 case RL78_Reg_B:
329 case RL78_Reg_C:
330 case RL78_Reg_BC:
331 PR (PS, "%d[%s]", oper->addend, register_names[oper->reg]);
332 break;
333
334 default:
335 PR (PS, "[%s", register_names[oper->reg]);
336 if (oper->reg2 != RL78_Reg_None)
337 PR (PS, "+%s", register_names[oper->reg2]);
338 if (oper->addend || do_addr)
339 PR (PS, "+%d", oper->addend);
340 PC (']');
341 break;
342
343 }
344 if (oper->type == RL78_Operand_BitIndirect)
345 PR (PS, ".%d", oper->bit_number);
346 break;
347
348 #if DEBUG_SEMANTICS
349 /* Shouldn't happen - push and pop don't print
350 [SP] directly. But we *do* use them for
351 semantic debugging. */
352 case RL78_Operand_PostInc:
353 PR (PS, "[%s++]", register_names[oper->reg]);
354 break;
355 case RL78_Operand_PreDec:
356 PR (PS, "[--%s]", register_names[oper->reg]);
357 break;
358 #endif
359
360 default:
361 /* If we ever print this, that means the
362 programmer tried to print an operand with a
363 type we don't expect. Print the line and
364 operand number from rl78-decode.opc for
365 them. */
366 PR (PS, "???%d.%d", opcode.lineno, *s - '0');
367 break;
368 }
369 }
370 }
371 }
372
373 #if DEBUG_SEMANTICS
374
375 PR (PS, "\t\033[34m(line %d)\033[0m", opcode.lineno);
376
377 #endif
378
379 return rv;
380 }
381
382 int
print_insn_rl78(bfd_vma addr,disassemble_info * dis)383 print_insn_rl78 (bfd_vma addr, disassemble_info * dis)
384 {
385 return print_insn_rl78_common (addr, dis, RL78_ISA_DEFAULT);
386 }
387
388 int
print_insn_rl78_g10(bfd_vma addr,disassemble_info * dis)389 print_insn_rl78_g10 (bfd_vma addr, disassemble_info * dis)
390 {
391 return print_insn_rl78_common (addr, dis, RL78_ISA_G10);
392 }
393
394 int
print_insn_rl78_g13(bfd_vma addr,disassemble_info * dis)395 print_insn_rl78_g13 (bfd_vma addr, disassemble_info * dis)
396 {
397 return print_insn_rl78_common (addr, dis, RL78_ISA_G13);
398 }
399
400 int
print_insn_rl78_g14(bfd_vma addr,disassemble_info * dis)401 print_insn_rl78_g14 (bfd_vma addr, disassemble_info * dis)
402 {
403 return print_insn_rl78_common (addr, dis, RL78_ISA_G14);
404 }
405
406 disassembler_ftype
rl78_get_disassembler(bfd * abfd)407 rl78_get_disassembler (bfd *abfd)
408 {
409 int cpu = E_FLAG_RL78_ANY_CPU;
410
411 if (abfd != NULL && bfd_get_flavour (abfd) == bfd_target_elf_flavour)
412 cpu = abfd->tdata.elf_obj_data->elf_header->e_flags & E_FLAG_RL78_CPU_MASK;
413
414 switch (cpu)
415 {
416 case E_FLAG_RL78_G10:
417 return print_insn_rl78_g10;
418 case E_FLAG_RL78_G13:
419 return print_insn_rl78_g13;
420 case E_FLAG_RL78_G14:
421 return print_insn_rl78_g14;
422 default:
423 return print_insn_rl78;
424 }
425 }
426