root / disas.c @ 36bb244b
History | View | Annotate | Download (10.3 kB)
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
|
17 |
buffer_read_memory (memaddr, myaddr, length, info) |
18 |
bfd_vma memaddr; |
19 |
bfd_byte *myaddr; |
20 |
int length;
|
21 |
struct disassemble_info *info;
|
22 |
{ |
23 |
if (memaddr < info->buffer_vma
|
24 |
|| memaddr + length > info->buffer_vma + info->buffer_length) |
25 |
/* Out of bounds. Use EIO because GDB uses it. */
|
26 |
return EIO;
|
27 |
memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length); |
28 |
return 0; |
29 |
} |
30 |
|
31 |
/* Get LENGTH bytes from info's buffer, at target address memaddr.
|
32 |
Transfer them to myaddr. */
|
33 |
static int |
34 |
target_read_memory (bfd_vma memaddr, |
35 |
bfd_byte *myaddr, |
36 |
int length,
|
37 |
struct disassemble_info *info)
|
38 |
{ |
39 |
int i;
|
40 |
for(i = 0; i < length; i++) { |
41 |
myaddr[i] = ldub_code(memaddr + i); |
42 |
} |
43 |
return 0; |
44 |
} |
45 |
|
46 |
/* Print an error message. We can assume that this is in response to
|
47 |
an error return from buffer_read_memory. */
|
48 |
void
|
49 |
perror_memory (status, memaddr, info) |
50 |
int status;
|
51 |
bfd_vma memaddr; |
52 |
struct disassemble_info *info;
|
53 |
{ |
54 |
if (status != EIO)
|
55 |
/* Can't happen. */
|
56 |
(*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
|
57 |
else
|
58 |
/* Actually, address between memaddr and memaddr + len was
|
59 |
out of bounds. */
|
60 |
(*info->fprintf_func) (info->stream, |
61 |
"Address 0x%" PRIx64 " is out of bounds.\n", memaddr); |
62 |
} |
63 |
|
64 |
/* This could be in a separate file, to save miniscule amounts of space
|
65 |
in statically linked executables. */
|
66 |
|
67 |
/* Just print the address is hex. This is included for completeness even
|
68 |
though both GDB and objdump provide their own (to print symbolic
|
69 |
addresses). */
|
70 |
|
71 |
void
|
72 |
generic_print_address (addr, info) |
73 |
bfd_vma addr; |
74 |
struct disassemble_info *info;
|
75 |
{ |
76 |
(*info->fprintf_func) (info->stream, "0x%" PRIx64, addr);
|
77 |
} |
78 |
|
79 |
/* Just return the given address. */
|
80 |
|
81 |
int
|
82 |
generic_symbol_at_address (addr, info) |
83 |
bfd_vma addr; |
84 |
struct disassemble_info * info;
|
85 |
{ |
86 |
return 1; |
87 |
} |
88 |
|
89 |
bfd_vma bfd_getl32 (const bfd_byte *addr)
|
90 |
{ |
91 |
unsigned long v; |
92 |
|
93 |
v = (unsigned long) addr[0]; |
94 |
v |= (unsigned long) addr[1] << 8; |
95 |
v |= (unsigned long) addr[2] << 16; |
96 |
v |= (unsigned long) addr[3] << 24; |
97 |
return (bfd_vma) v;
|
98 |
} |
99 |
|
100 |
bfd_vma bfd_getb32 (const bfd_byte *addr)
|
101 |
{ |
102 |
unsigned long v; |
103 |
|
104 |
v = (unsigned long) addr[0] << 24; |
105 |
v |= (unsigned long) addr[1] << 16; |
106 |
v |= (unsigned long) addr[2] << 8; |
107 |
v |= (unsigned long) addr[3]; |
108 |
return (bfd_vma) v;
|
109 |
} |
110 |
|
111 |
bfd_vma bfd_getl16 (const bfd_byte *addr)
|
112 |
{ |
113 |
unsigned long v; |
114 |
|
115 |
v = (unsigned long) addr[0]; |
116 |
v |= (unsigned long) addr[1] << 8; |
117 |
return (bfd_vma) v;
|
118 |
} |
119 |
|
120 |
bfd_vma bfd_getb16 (const bfd_byte *addr)
|
121 |
{ |
122 |
unsigned long v; |
123 |
|
124 |
v = (unsigned long) addr[0] << 24; |
125 |
v |= (unsigned long) addr[1] << 16; |
126 |
return (bfd_vma) v;
|
127 |
} |
128 |
|
129 |
#ifdef TARGET_ARM
|
130 |
static int |
131 |
print_insn_thumb1(bfd_vma pc, disassemble_info *info) |
132 |
{ |
133 |
return print_insn_arm(pc | 1, info); |
134 |
} |
135 |
#endif
|
136 |
|
137 |
/* Disassemble this for me please... (debugging). 'flags' has teh following
|
138 |
values:
|
139 |
i386 - nonzero means 16 bit code
|
140 |
arm - nonzero means thumb code
|
141 |
ppc - nonzero means little endian
|
142 |
other targets - unused
|
143 |
*/
|
144 |
void target_disas(FILE *out, target_ulong code, target_ulong size, int flags) |
145 |
{ |
146 |
target_ulong pc; |
147 |
int count;
|
148 |
struct disassemble_info disasm_info;
|
149 |
int (*print_insn)(bfd_vma pc, disassemble_info *info);
|
150 |
|
151 |
INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf); |
152 |
|
153 |
disasm_info.read_memory_func = target_read_memory; |
154 |
disasm_info.buffer_vma = code; |
155 |
disasm_info.buffer_length = size; |
156 |
|
157 |
#ifdef TARGET_WORDS_BIGENDIAN
|
158 |
disasm_info.endian = BFD_ENDIAN_BIG; |
159 |
#else
|
160 |
disasm_info.endian = BFD_ENDIAN_LITTLE; |
161 |
#endif
|
162 |
#if defined(TARGET_I386)
|
163 |
if (flags == 2) |
164 |
disasm_info.mach = bfd_mach_x86_64; |
165 |
else if (flags == 1) |
166 |
disasm_info.mach = bfd_mach_i386_i8086; |
167 |
else
|
168 |
disasm_info.mach = bfd_mach_i386_i386; |
169 |
print_insn = print_insn_i386; |
170 |
#elif defined(TARGET_ARM)
|
171 |
if (flags)
|
172 |
print_insn = print_insn_thumb1; |
173 |
else
|
174 |
print_insn = print_insn_arm; |
175 |
#elif defined(TARGET_SPARC)
|
176 |
print_insn = print_insn_sparc; |
177 |
#ifdef TARGET_SPARC64
|
178 |
disasm_info.mach = bfd_mach_sparc_v9b; |
179 |
#endif
|
180 |
#elif defined(TARGET_PPC)
|
181 |
if (flags)
|
182 |
disasm_info.endian = BFD_ENDIAN_LITTLE; |
183 |
#ifdef TARGET_PPC64
|
184 |
disasm_info.mach = bfd_mach_ppc64; |
185 |
#else
|
186 |
disasm_info.mach = bfd_mach_ppc; |
187 |
#endif
|
188 |
print_insn = print_insn_ppc; |
189 |
#elif defined(TARGET_M68K)
|
190 |
print_insn = print_insn_m68k; |
191 |
#elif defined(TARGET_MIPS)
|
192 |
#ifdef TARGET_WORDS_BIGENDIAN
|
193 |
print_insn = print_insn_big_mips; |
194 |
#else
|
195 |
print_insn = print_insn_little_mips; |
196 |
#endif
|
197 |
#elif defined(TARGET_SH4)
|
198 |
disasm_info.mach = bfd_mach_sh4; |
199 |
print_insn = print_insn_sh; |
200 |
#else
|
201 |
fprintf(out, "0x" TARGET_FMT_lx
|
202 |
": Asm output not supported on this arch\n", code);
|
203 |
return;
|
204 |
#endif
|
205 |
|
206 |
for (pc = code; pc < code + size; pc += count) {
|
207 |
fprintf(out, "0x" TARGET_FMT_lx ": ", pc); |
208 |
count = print_insn(pc, &disasm_info); |
209 |
#if 0
|
210 |
{
|
211 |
int i;
|
212 |
uint8_t b;
|
213 |
fprintf(out, " {");
|
214 |
for(i = 0; i < count; i++) {
|
215 |
target_read_memory(pc + i, &b, 1, &disasm_info);
|
216 |
fprintf(out, " %02x", b);
|
217 |
}
|
218 |
fprintf(out, " }");
|
219 |
}
|
220 |
#endif
|
221 |
fprintf(out, "\n");
|
222 |
if (count < 0) |
223 |
break;
|
224 |
} |
225 |
} |
226 |
|
227 |
/* Disassemble this for me please... (debugging). */
|
228 |
void disas(FILE *out, void *code, unsigned long size) |
229 |
{ |
230 |
unsigned long pc; |
231 |
int count;
|
232 |
struct disassemble_info disasm_info;
|
233 |
int (*print_insn)(bfd_vma pc, disassemble_info *info);
|
234 |
|
235 |
INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf); |
236 |
|
237 |
disasm_info.buffer = code; |
238 |
disasm_info.buffer_vma = (unsigned long)code; |
239 |
disasm_info.buffer_length = size; |
240 |
|
241 |
#ifdef WORDS_BIGENDIAN
|
242 |
disasm_info.endian = BFD_ENDIAN_BIG; |
243 |
#else
|
244 |
disasm_info.endian = BFD_ENDIAN_LITTLE; |
245 |
#endif
|
246 |
#if defined(__i386__)
|
247 |
disasm_info.mach = bfd_mach_i386_i386; |
248 |
print_insn = print_insn_i386; |
249 |
#elif defined(__x86_64__)
|
250 |
disasm_info.mach = bfd_mach_x86_64; |
251 |
print_insn = print_insn_i386; |
252 |
#elif defined(__powerpc__)
|
253 |
print_insn = print_insn_ppc; |
254 |
#elif defined(__alpha__)
|
255 |
print_insn = print_insn_alpha; |
256 |
#elif defined(__sparc__)
|
257 |
print_insn = print_insn_sparc; |
258 |
#elif defined(__arm__)
|
259 |
print_insn = print_insn_arm; |
260 |
#elif defined(__MIPSEB__)
|
261 |
print_insn = print_insn_big_mips; |
262 |
#elif defined(__MIPSEL__)
|
263 |
print_insn = print_insn_little_mips; |
264 |
#elif defined(__m68k__)
|
265 |
print_insn = print_insn_m68k; |
266 |
#else
|
267 |
fprintf(out, "0x%lx: Asm output not supported on this arch\n",
|
268 |
(long) code);
|
269 |
return;
|
270 |
#endif
|
271 |
for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) { |
272 |
fprintf(out, "0x%08lx: ", pc);
|
273 |
#ifdef __arm__
|
274 |
/* since data is included in the code, it is better to
|
275 |
display code data too */
|
276 |
fprintf(out, "%08x ", (int)bfd_getl32((const bfd_byte *)pc)); |
277 |
#endif
|
278 |
count = print_insn(pc, &disasm_info); |
279 |
fprintf(out, "\n");
|
280 |
if (count < 0) |
281 |
break;
|
282 |
} |
283 |
} |
284 |
|
285 |
/* Look up symbol for debugging purpose. Returns "" if unknown. */
|
286 |
const char *lookup_symbol(target_ulong orig_addr) |
287 |
{ |
288 |
unsigned int i; |
289 |
/* Hack, because we know this is x86. */
|
290 |
Elf32_Sym *sym; |
291 |
struct syminfo *s;
|
292 |
target_ulong addr; |
293 |
|
294 |
for (s = syminfos; s; s = s->next) {
|
295 |
sym = s->disas_symtab; |
296 |
for (i = 0; i < s->disas_num_syms; i++) { |
297 |
if (sym[i].st_shndx == SHN_UNDEF
|
298 |
|| sym[i].st_shndx >= SHN_LORESERVE) |
299 |
continue;
|
300 |
|
301 |
if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC)
|
302 |
continue;
|
303 |
|
304 |
addr = sym[i].st_value; |
305 |
#ifdef TARGET_ARM
|
306 |
/* The bottom address bit marks a Thumb symbol. */
|
307 |
addr &= ~(target_ulong)1;
|
308 |
#endif
|
309 |
if (orig_addr >= addr
|
310 |
&& orig_addr < addr + sym[i].st_size) |
311 |
return s->disas_strtab + sym[i].st_name;
|
312 |
} |
313 |
} |
314 |
return ""; |
315 |
} |
316 |
|
317 |
#if !defined(CONFIG_USER_ONLY)
|
318 |
|
319 |
void term_vprintf(const char *fmt, va_list ap); |
320 |
void term_printf(const char *fmt, ...); |
321 |
|
322 |
static int monitor_disas_is_physical; |
323 |
static CPUState *monitor_disas_env;
|
324 |
|
325 |
static int |
326 |
monitor_read_memory (memaddr, myaddr, length, info) |
327 |
bfd_vma memaddr; |
328 |
bfd_byte *myaddr; |
329 |
int length;
|
330 |
struct disassemble_info *info;
|
331 |
{ |
332 |
if (monitor_disas_is_physical) {
|
333 |
cpu_physical_memory_rw(memaddr, myaddr, length, 0);
|
334 |
} else {
|
335 |
cpu_memory_rw_debug(monitor_disas_env, memaddr,myaddr, length, 0);
|
336 |
} |
337 |
return 0; |
338 |
} |
339 |
|
340 |
static int monitor_fprintf(FILE *stream, const char *fmt, ...) |
341 |
{ |
342 |
va_list ap; |
343 |
va_start(ap, fmt); |
344 |
term_vprintf(fmt, ap); |
345 |
va_end(ap); |
346 |
return 0; |
347 |
} |
348 |
|
349 |
void monitor_disas(CPUState *env,
|
350 |
target_ulong pc, int nb_insn, int is_physical, int flags) |
351 |
{ |
352 |
int count, i;
|
353 |
struct disassemble_info disasm_info;
|
354 |
int (*print_insn)(bfd_vma pc, disassemble_info *info);
|
355 |
|
356 |
INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf);
|
357 |
|
358 |
monitor_disas_env = env; |
359 |
monitor_disas_is_physical = is_physical; |
360 |
disasm_info.read_memory_func = monitor_read_memory; |
361 |
|
362 |
disasm_info.buffer_vma = pc; |
363 |
|
364 |
#ifdef TARGET_WORDS_BIGENDIAN
|
365 |
disasm_info.endian = BFD_ENDIAN_BIG; |
366 |
#else
|
367 |
disasm_info.endian = BFD_ENDIAN_LITTLE; |
368 |
#endif
|
369 |
#if defined(TARGET_I386)
|
370 |
if (flags == 2) |
371 |
disasm_info.mach = bfd_mach_x86_64; |
372 |
else if (flags == 1) |
373 |
disasm_info.mach = bfd_mach_i386_i8086; |
374 |
else
|
375 |
disasm_info.mach = bfd_mach_i386_i386; |
376 |
print_insn = print_insn_i386; |
377 |
#elif defined(TARGET_ARM)
|
378 |
print_insn = print_insn_arm; |
379 |
#elif defined(TARGET_SPARC)
|
380 |
print_insn = print_insn_sparc; |
381 |
#elif defined(TARGET_PPC)
|
382 |
#ifdef TARGET_PPC64
|
383 |
disasm_info.mach = bfd_mach_ppc64; |
384 |
#else
|
385 |
disasm_info.mach = bfd_mach_ppc; |
386 |
#endif
|
387 |
print_insn = print_insn_ppc; |
388 |
#elif defined(TARGET_M68K)
|
389 |
print_insn = print_insn_m68k; |
390 |
#elif defined(TARGET_MIPS)
|
391 |
#ifdef TARGET_WORDS_BIGENDIAN
|
392 |
print_insn = print_insn_big_mips; |
393 |
#else
|
394 |
print_insn = print_insn_little_mips; |
395 |
#endif
|
396 |
#else
|
397 |
term_printf("0x" TARGET_FMT_lx
|
398 |
": Asm output not supported on this arch\n", pc);
|
399 |
return;
|
400 |
#endif
|
401 |
|
402 |
for(i = 0; i < nb_insn; i++) { |
403 |
term_printf("0x" TARGET_FMT_lx ": ", pc); |
404 |
count = print_insn(pc, &disasm_info); |
405 |
term_printf("\n");
|
406 |
if (count < 0) |
407 |
break;
|
408 |
pc += count; |
409 |
} |
410 |
} |
411 |
#endif
|