1 /* General "disassemble this chunk" code. Used for debugging. */
2 #include "config.h"
3 #include "dis-asm.h"
4 #include "elf.h"
5 #include <errno.h>
6
7 #include "cpu.h"
8 #include "exec-all.h"
9 #include "disas.h"
10
11 /* Filled in by elfload.c. Simplistic, but will do for now. */
12 struct syminfo *syminfos = NULL;
13
14 /* Get LENGTH bytes from info's buffer, at target address memaddr.
15 Transfer them to myaddr. */
16 int
buffer_read_memory(bfd_vma memaddr,bfd_byte * myaddr,int length,struct disassemble_info * info)17 buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
18 struct disassemble_info *info)
19 {
20 if (memaddr < info->buffer_vma
21 || memaddr + length > info->buffer_vma + info->buffer_length)
22 /* Out of bounds. Use EIO because GDB uses it. */
23 return EIO;
24 memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
25 return 0;
26 }
27
28 /* Get LENGTH bytes from info's buffer, at target address memaddr.
29 Transfer them to myaddr. */
30 static int
target_read_memory(bfd_vma memaddr,bfd_byte * myaddr,int length,struct disassemble_info * info)31 target_read_memory (bfd_vma memaddr,
32 bfd_byte *myaddr,
33 int length,
34 struct disassemble_info *info)
35 {
36 cpu_memory_rw_debug(cpu_single_env, memaddr, myaddr, length, 0);
37 return 0;
38 }
39
40 /* Print an error message. We can assume that this is in response to
41 an error return from buffer_read_memory. */
42 void
perror_memory(int status,bfd_vma memaddr,struct disassemble_info * info)43 perror_memory (int status, bfd_vma memaddr, struct disassemble_info *info)
44 {
45 if (status != EIO)
46 /* Can't happen. */
47 (*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
48 else
49 /* Actually, address between memaddr and memaddr + len was
50 out of bounds. */
51 (*info->fprintf_func) (info->stream,
52 "Address 0x%" PRIx64 " is out of bounds.\n", memaddr);
53 }
54
55 /* This could be in a separate file, to save miniscule amounts of space
56 in statically linked executables. */
57
58 /* Just print the address is hex. This is included for completeness even
59 though both GDB and objdump provide their own (to print symbolic
60 addresses). */
61
62 void
generic_print_address(bfd_vma addr,struct disassemble_info * info)63 generic_print_address (bfd_vma addr, struct disassemble_info *info)
64 {
65 (*info->fprintf_func) (info->stream, "0x%" PRIx64, addr);
66 }
67
68 /* Just return the given address. */
69
70 int
generic_symbol_at_address(bfd_vma addr,struct disassemble_info * info)71 generic_symbol_at_address (bfd_vma addr, struct disassemble_info *info)
72 {
73 return 1;
74 }
75
bfd_getl64(const bfd_byte * addr)76 bfd_vma bfd_getl64 (const bfd_byte *addr)
77 {
78 unsigned long long v;
79
80 v = (unsigned long long) addr[0];
81 v |= (unsigned long long) addr[1] << 8;
82 v |= (unsigned long long) addr[2] << 16;
83 v |= (unsigned long long) addr[3] << 24;
84 v |= (unsigned long long) addr[4] << 32;
85 v |= (unsigned long long) addr[5] << 40;
86 v |= (unsigned long long) addr[6] << 48;
87 v |= (unsigned long long) addr[7] << 56;
88 return (bfd_vma) v;
89 }
90
bfd_getl32(const bfd_byte * addr)91 bfd_vma bfd_getl32 (const bfd_byte *addr)
92 {
93 unsigned long v;
94
95 v = (unsigned long) addr[0];
96 v |= (unsigned long) addr[1] << 8;
97 v |= (unsigned long) addr[2] << 16;
98 v |= (unsigned long) addr[3] << 24;
99 return (bfd_vma) v;
100 }
101
bfd_getb32(const bfd_byte * addr)102 bfd_vma bfd_getb32 (const bfd_byte *addr)
103 {
104 unsigned long v;
105
106 v = (unsigned long) addr[0] << 24;
107 v |= (unsigned long) addr[1] << 16;
108 v |= (unsigned long) addr[2] << 8;
109 v |= (unsigned long) addr[3];
110 return (bfd_vma) v;
111 }
112
bfd_getl16(const bfd_byte * addr)113 bfd_vma bfd_getl16 (const bfd_byte *addr)
114 {
115 unsigned long v;
116
117 v = (unsigned long) addr[0];
118 v |= (unsigned long) addr[1] << 8;
119 return (bfd_vma) v;
120 }
121
bfd_getb16(const bfd_byte * addr)122 bfd_vma bfd_getb16 (const bfd_byte *addr)
123 {
124 unsigned long v;
125
126 v = (unsigned long) addr[0] << 24;
127 v |= (unsigned long) addr[1] << 16;
128 return (bfd_vma) v;
129 }
130
131 #ifdef TARGET_ARM
132 static int
print_insn_thumb1(bfd_vma pc,disassemble_info * info)133 print_insn_thumb1(bfd_vma pc, disassemble_info *info)
134 {
135 return print_insn_arm(pc | 1, info);
136 }
137 #endif
138
139 /* Disassemble this for me please... (debugging). 'flags' has the following
140 values:
141 i386 - nonzero means 16 bit code
142 arm - nonzero means thumb code
143 ppc - nonzero means little endian
144 other targets - unused
145 */
target_disas(FILE * out,target_ulong code,target_ulong size,int flags)146 void target_disas(FILE *out, target_ulong code, target_ulong size, int flags)
147 {
148 target_ulong pc;
149 int count;
150 struct disassemble_info disasm_info;
151 int (*print_insn)(bfd_vma pc, disassemble_info *info);
152
153 INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
154
155 disasm_info.read_memory_func = target_read_memory;
156 disasm_info.buffer_vma = code;
157 disasm_info.buffer_length = size;
158
159 #ifdef TARGET_WORDS_BIGENDIAN
160 disasm_info.endian = BFD_ENDIAN_BIG;
161 #else
162 disasm_info.endian = BFD_ENDIAN_LITTLE;
163 #endif
164 #if defined(TARGET_I386)
165 if (flags == 2)
166 disasm_info.mach = bfd_mach_x86_64;
167 else if (flags == 1)
168 disasm_info.mach = bfd_mach_i386_i8086;
169 else
170 disasm_info.mach = bfd_mach_i386_i386;
171 print_insn = print_insn_i386;
172 #elif defined(TARGET_ARM)
173 if (flags)
174 print_insn = print_insn_thumb1;
175 else
176 print_insn = print_insn_arm;
177 #elif defined(TARGET_SPARC)
178 print_insn = print_insn_sparc;
179 #ifdef TARGET_SPARC64
180 disasm_info.mach = bfd_mach_sparc_v9b;
181 #endif
182 #elif defined(TARGET_PPC)
183 if (flags >> 16)
184 disasm_info.endian = BFD_ENDIAN_LITTLE;
185 if (flags & 0xFFFF) {
186 /* If we have a precise definitions of the instructions set, use it */
187 disasm_info.mach = flags & 0xFFFF;
188 } else {
189 #ifdef TARGET_PPC64
190 disasm_info.mach = bfd_mach_ppc64;
191 #else
192 disasm_info.mach = bfd_mach_ppc;
193 #endif
194 }
195 print_insn = print_insn_ppc;
196 #elif defined(TARGET_M68K)
197 print_insn = print_insn_m68k;
198 #elif defined(TARGET_MIPS)
199 #ifdef TARGET_WORDS_BIGENDIAN
200 print_insn = print_insn_big_mips;
201 #else
202 print_insn = print_insn_little_mips;
203 #endif
204 #elif defined(TARGET_SH4)
205 disasm_info.mach = bfd_mach_sh4;
206 print_insn = print_insn_sh;
207 #elif defined(TARGET_ALPHA)
208 disasm_info.mach = bfd_mach_alpha;
209 print_insn = print_insn_alpha;
210 #elif defined(TARGET_CRIS)
211 if (flags != 32) {
212 disasm_info.mach = bfd_mach_cris_v0_v10;
213 print_insn = print_insn_crisv10;
214 } else {
215 disasm_info.mach = bfd_mach_cris_v32;
216 print_insn = print_insn_crisv32;
217 }
218 #elif defined(TARGET_S390X)
219 disasm_info.mach = bfd_mach_s390_64;
220 print_insn = print_insn_s390;
221 #elif defined(TARGET_MICROBLAZE)
222 disasm_info.mach = bfd_arch_microblaze;
223 print_insn = print_insn_microblaze;
224 #else
225 fprintf(out, "0x" TARGET_FMT_lx
226 ": Asm output not supported on this arch\n", code);
227 return;
228 #endif
229
230 for (pc = code; size > 0; pc += count, size -= count) {
231 fprintf(out, "0x" TARGET_FMT_lx ": ", pc);
232 count = print_insn(pc, &disasm_info);
233 #if 0
234 {
235 int i;
236 uint8_t b;
237 fprintf(out, " {");
238 for(i = 0; i < count; i++) {
239 target_read_memory(pc + i, &b, 1, &disasm_info);
240 fprintf(out, " %02x", b);
241 }
242 fprintf(out, " }");
243 }
244 #endif
245 fprintf(out, "\n");
246 if (count < 0)
247 break;
248 if (size < count) {
249 fprintf(out,
250 "Disassembler disagrees with translator over instruction "
251 "decoding\n"
252 "Please report this to qemu-devel@nongnu.org\n");
253 break;
254 }
255 }
256 }
257
258 /* Disassemble this for me please... (debugging). */
disas(FILE * out,void * code,unsigned long size)259 void disas(FILE *out, void *code, unsigned long size)
260 {
261 unsigned long pc;
262 int count;
263 struct disassemble_info disasm_info;
264 int (*print_insn)(bfd_vma pc, disassemble_info *info);
265
266 INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
267
268 disasm_info.buffer = code;
269 disasm_info.buffer_vma = (unsigned long)code;
270 disasm_info.buffer_length = size;
271
272 #ifdef HOST_WORDS_BIGENDIAN
273 disasm_info.endian = BFD_ENDIAN_BIG;
274 #else
275 disasm_info.endian = BFD_ENDIAN_LITTLE;
276 #endif
277 #if defined(__i386__)
278 disasm_info.mach = bfd_mach_i386_i386;
279 print_insn = print_insn_i386;
280 #elif defined(__x86_64__)
281 disasm_info.mach = bfd_mach_x86_64;
282 print_insn = print_insn_i386;
283 #elif defined(_ARCH_PPC)
284 print_insn = print_insn_ppc;
285 #elif defined(__alpha__)
286 print_insn = print_insn_alpha;
287 #elif defined(__sparc__)
288 print_insn = print_insn_sparc;
289 #if defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__)
290 disasm_info.mach = bfd_mach_sparc_v9b;
291 #endif
292 #elif defined(__arm__)
293 print_insn = print_insn_arm;
294 #elif defined(__MIPSEB__)
295 print_insn = print_insn_big_mips;
296 #elif defined(__MIPSEL__)
297 print_insn = print_insn_little_mips;
298 #elif defined(__m68k__)
299 print_insn = print_insn_m68k;
300 #elif defined(__s390__)
301 print_insn = print_insn_s390;
302 #elif defined(__hppa__)
303 print_insn = print_insn_hppa;
304 #elif defined(__ia64__)
305 print_insn = print_insn_ia64;
306 #else
307 fprintf(out, "0x%lx: Asm output not supported on this arch\n",
308 (long) code);
309 return;
310 #endif
311 for (pc = (unsigned long)code; size > 0; pc += count, size -= count) {
312 fprintf(out, "0x%08lx: ", pc);
313 count = print_insn(pc, &disasm_info);
314 fprintf(out, "\n");
315 if (count < 0)
316 break;
317 }
318 }
319
320 /* Look up symbol for debugging purpose. Returns "" if unknown. */
lookup_symbol(target_ulong orig_addr)321 const char *lookup_symbol(target_ulong orig_addr)
322 {
323 const char *symbol = "";
324 struct syminfo *s;
325
326 for (s = syminfos; s; s = s->next) {
327 symbol = s->lookup_symbol(s, orig_addr);
328 if (symbol[0] != '\0') {
329 break;
330 }
331 }
332
333 return symbol;
334 }
335
336 #if !defined(CONFIG_USER_ONLY)
337
338 #include "monitor.h"
339
340 static int monitor_disas_is_physical;
341 static CPUState *monitor_disas_env;
342
343 static int
monitor_read_memory(bfd_vma memaddr,bfd_byte * myaddr,int length,struct disassemble_info * info)344 monitor_read_memory (bfd_vma memaddr, bfd_byte *myaddr, int length,
345 struct disassemble_info *info)
346 {
347 if (monitor_disas_is_physical) {
348 cpu_physical_memory_read(memaddr, myaddr, length);
349 } else {
350 cpu_memory_rw_debug(monitor_disas_env, memaddr,myaddr, length, 0);
351 }
352 return 0;
353 }
354
355 static int GCC_FMT_ATTR(2, 3)
monitor_fprintf(FILE * stream,const char * fmt,...)356 monitor_fprintf(FILE *stream, const char *fmt, ...)
357 {
358 va_list ap;
359 va_start(ap, fmt);
360 monitor_vprintf((Monitor *)stream, fmt, ap);
361 va_end(ap);
362 return 0;
363 }
364
monitor_disas(Monitor * mon,CPUState * env,target_ulong pc,int nb_insn,int is_physical,int flags)365 void monitor_disas(Monitor *mon, CPUState *env,
366 target_ulong pc, int nb_insn, int is_physical, int flags)
367 {
368 int count, i;
369 struct disassemble_info disasm_info;
370 int (*print_insn)(bfd_vma pc, disassemble_info *info);
371
372 INIT_DISASSEMBLE_INFO(disasm_info, (FILE *)mon, monitor_fprintf);
373
374 monitor_disas_env = env;
375 monitor_disas_is_physical = is_physical;
376 disasm_info.read_memory_func = monitor_read_memory;
377
378 disasm_info.buffer_vma = pc;
379
380 #ifdef TARGET_WORDS_BIGENDIAN
381 disasm_info.endian = BFD_ENDIAN_BIG;
382 #else
383 disasm_info.endian = BFD_ENDIAN_LITTLE;
384 #endif
385 #if defined(TARGET_I386)
386 if (flags == 2)
387 disasm_info.mach = bfd_mach_x86_64;
388 else if (flags == 1)
389 disasm_info.mach = bfd_mach_i386_i8086;
390 else
391 disasm_info.mach = bfd_mach_i386_i386;
392 print_insn = print_insn_i386;
393 #elif defined(TARGET_ARM)
394 print_insn = print_insn_arm;
395 #elif defined(TARGET_ALPHA)
396 print_insn = print_insn_alpha;
397 #elif defined(TARGET_SPARC)
398 print_insn = print_insn_sparc;
399 #ifdef TARGET_SPARC64
400 disasm_info.mach = bfd_mach_sparc_v9b;
401 #endif
402 #elif defined(TARGET_PPC)
403 #ifdef TARGET_PPC64
404 disasm_info.mach = bfd_mach_ppc64;
405 #else
406 disasm_info.mach = bfd_mach_ppc;
407 #endif
408 print_insn = print_insn_ppc;
409 #elif defined(TARGET_M68K)
410 print_insn = print_insn_m68k;
411 #elif defined(TARGET_MIPS)
412 #ifdef TARGET_WORDS_BIGENDIAN
413 print_insn = print_insn_big_mips;
414 #else
415 print_insn = print_insn_little_mips;
416 #endif
417 #elif defined(TARGET_SH4)
418 disasm_info.mach = bfd_mach_sh4;
419 print_insn = print_insn_sh;
420 #elif defined(TARGET_S390X)
421 disasm_info.mach = bfd_mach_s390_64;
422 print_insn = print_insn_s390;
423 #else
424 monitor_printf(mon, "0x" TARGET_FMT_lx
425 ": Asm output not supported on this arch\n", pc);
426 return;
427 #endif
428
429 for(i = 0; i < nb_insn; i++) {
430 monitor_printf(mon, "0x" TARGET_FMT_lx ": ", pc);
431 count = print_insn(pc, &disasm_info);
432 monitor_printf(mon, "\n");
433 if (count < 0)
434 break;
435 pc += count;
436 }
437 }
438 #endif
439