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Commit | Line | Data |
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b9adb4a6 | 1 | /* General "disassemble this chunk" code. Used for debugging. */ |
5bbe9299 | 2 | #include "config.h" |
b9adb4a6 | 3 | #include "dis-asm.h" |
b9adb4a6 | 4 | #include "elf.h" |
aa0aa4fa | 5 | #include <errno.h> |
b9adb4a6 | 6 | |
c6105c0a FB |
7 | #include "cpu.h" |
8 | #include "exec-all.h" | |
9307c4c1 | 9 | #include "disas.h" |
c6105c0a | 10 | |
b9adb4a6 | 11 | /* Filled in by elfload.c. Simplistic, but will do for now. */ |
e80cfcfc | 12 | struct syminfo *syminfos = NULL; |
b9adb4a6 | 13 | |
aa0aa4fa FB |
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 | { | |
c6105c0a FB |
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; | |
aa0aa4fa FB |
29 | } |
30 | ||
c6105c0a FB |
31 | /* Get LENGTH bytes from info's buffer, at target address memaddr. |
32 | Transfer them to myaddr. */ | |
33 | static int | |
c27004ec FB |
34 | target_read_memory (bfd_vma memaddr, |
35 | bfd_byte *myaddr, | |
36 | int length, | |
37 | struct disassemble_info *info) | |
c6105c0a FB |
38 | { |
39 | int i; | |
40 | for(i = 0; i < length; i++) { | |
c27004ec | 41 | myaddr[i] = ldub_code(memaddr + i); |
c6105c0a FB |
42 | } |
43 | return 0; | |
44 | } | |
c6105c0a | 45 | |
aa0aa4fa FB |
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, | |
d44b29c2 | 61 | "Address 0x%llx is out of bounds.\n", memaddr); |
aa0aa4fa FB |
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 | { | |
d44b29c2 | 76 | (*info->fprintf_func) (info->stream, "0x%llx", addr); |
aa0aa4fa FB |
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 | ||
95cbfc64 FB |
111 | /* Disassemble this for me please... (debugging). 'flags' is only used |
112 | for i386: non zero means 16 bit code */ | |
83b34f8b | 113 | void target_disas(FILE *out, target_ulong code, target_ulong size, int flags) |
b9adb4a6 | 114 | { |
c27004ec | 115 | target_ulong pc; |
b9adb4a6 FB |
116 | int count; |
117 | struct disassemble_info disasm_info; | |
118 | int (*print_insn)(bfd_vma pc, disassemble_info *info); | |
119 | ||
120 | INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf); | |
121 | ||
c27004ec FB |
122 | disasm_info.read_memory_func = target_read_memory; |
123 | disasm_info.buffer_vma = code; | |
124 | disasm_info.buffer_length = size; | |
125 | ||
126 | #ifdef TARGET_WORDS_BIGENDIAN | |
127 | disasm_info.endian = BFD_ENDIAN_BIG; | |
128 | #else | |
129 | disasm_info.endian = BFD_ENDIAN_LITTLE; | |
130 | #endif | |
131 | #if defined(TARGET_I386) | |
132 | if (flags == 2) | |
133 | disasm_info.mach = bfd_mach_x86_64; | |
134 | else if (flags == 1) | |
135 | disasm_info.mach = bfd_mach_i386_i8086; | |
136 | else | |
137 | disasm_info.mach = bfd_mach_i386_i386; | |
138 | print_insn = print_insn_i386; | |
139 | #elif defined(TARGET_ARM) | |
140 | print_insn = print_insn_arm; | |
141 | #elif defined(TARGET_SPARC) | |
142 | print_insn = print_insn_sparc; | |
143 | #elif defined(TARGET_PPC) | |
144 | print_insn = print_insn_ppc; | |
145 | #else | |
146 | fprintf(out, "Asm output not supported on this arch\n"); | |
147 | return; | |
c6105c0a FB |
148 | #endif |
149 | ||
c27004ec | 150 | for (pc = code; pc < code + size; pc += count) { |
fa15e030 | 151 | fprintf(out, "0x" TARGET_FMT_lx ": ", pc); |
c27004ec FB |
152 | count = print_insn(pc, &disasm_info); |
153 | #if 0 | |
154 | { | |
155 | int i; | |
156 | uint8_t b; | |
157 | fprintf(out, " {"); | |
158 | for(i = 0; i < count; i++) { | |
159 | target_read_memory(pc + i, &b, 1, &disasm_info); | |
160 | fprintf(out, " %02x", b); | |
161 | } | |
162 | fprintf(out, " }"); | |
163 | } | |
164 | #endif | |
165 | fprintf(out, "\n"); | |
166 | if (count < 0) | |
167 | break; | |
168 | } | |
169 | } | |
170 | ||
171 | /* Disassemble this for me please... (debugging). */ | |
172 | void disas(FILE *out, void *code, unsigned long size) | |
173 | { | |
174 | unsigned long pc; | |
175 | int count; | |
176 | struct disassemble_info disasm_info; | |
177 | int (*print_insn)(bfd_vma pc, disassemble_info *info); | |
178 | ||
179 | INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf); | |
180 | ||
b9adb4a6 FB |
181 | disasm_info.buffer = code; |
182 | disasm_info.buffer_vma = (unsigned long)code; | |
183 | disasm_info.buffer_length = size; | |
184 | ||
b9adb4a6 | 185 | #ifdef WORDS_BIGENDIAN |
c27004ec | 186 | disasm_info.endian = BFD_ENDIAN_BIG; |
b9adb4a6 | 187 | #else |
c27004ec | 188 | disasm_info.endian = BFD_ENDIAN_LITTLE; |
b9adb4a6 | 189 | #endif |
bc51c5c9 | 190 | #if defined(__i386__) |
c27004ec FB |
191 | disasm_info.mach = bfd_mach_i386_i386; |
192 | print_insn = print_insn_i386; | |
bc51c5c9 | 193 | #elif defined(__x86_64__) |
c27004ec FB |
194 | disasm_info.mach = bfd_mach_x86_64; |
195 | print_insn = print_insn_i386; | |
b9adb4a6 | 196 | #elif defined(__powerpc__) |
c27004ec | 197 | print_insn = print_insn_ppc; |
a993ba85 | 198 | #elif defined(__alpha__) |
c27004ec | 199 | print_insn = print_insn_alpha; |
aa0aa4fa | 200 | #elif defined(__sparc__) |
c27004ec | 201 | print_insn = print_insn_sparc; |
aa0aa4fa | 202 | #elif defined(__arm__) |
c27004ec | 203 | print_insn = print_insn_arm; |
b9adb4a6 | 204 | #else |
c27004ec FB |
205 | fprintf(out, "Asm output not supported on this arch\n"); |
206 | return; | |
b9adb4a6 | 207 | #endif |
c27004ec FB |
208 | for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) { |
209 | fprintf(out, "0x%08lx: ", pc); | |
aa0aa4fa FB |
210 | #ifdef __arm__ |
211 | /* since data are included in the code, it is better to | |
212 | display code data too */ | |
95cbfc64 | 213 | if (is_host) { |
aa0aa4fa FB |
214 | fprintf(out, "%08x ", (int)bfd_getl32((const bfd_byte *)pc)); |
215 | } | |
216 | #endif | |
c27004ec | 217 | count = print_insn(pc, &disasm_info); |
b9adb4a6 FB |
218 | fprintf(out, "\n"); |
219 | if (count < 0) | |
220 | break; | |
221 | } | |
222 | } | |
223 | ||
224 | /* Look up symbol for debugging purpose. Returns "" if unknown. */ | |
c27004ec | 225 | const char *lookup_symbol(target_ulong orig_addr) |
b9adb4a6 FB |
226 | { |
227 | unsigned int i; | |
228 | /* Hack, because we know this is x86. */ | |
e80cfcfc FB |
229 | Elf32_Sym *sym; |
230 | struct syminfo *s; | |
231 | ||
232 | for (s = syminfos; s; s = s->next) { | |
233 | sym = s->disas_symtab; | |
234 | for (i = 0; i < s->disas_num_syms; i++) { | |
235 | if (sym[i].st_shndx == SHN_UNDEF | |
236 | || sym[i].st_shndx >= SHN_LORESERVE) | |
237 | continue; | |
b9adb4a6 | 238 | |
e80cfcfc FB |
239 | if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC) |
240 | continue; | |
b9adb4a6 | 241 | |
c27004ec FB |
242 | if (orig_addr >= sym[i].st_value |
243 | && orig_addr < sym[i].st_value + sym[i].st_size) | |
e80cfcfc FB |
244 | return s->disas_strtab + sym[i].st_name; |
245 | } | |
b9adb4a6 FB |
246 | } |
247 | return ""; | |
248 | } | |
9307c4c1 FB |
249 | |
250 | #if !defined(CONFIG_USER_ONLY) | |
251 | ||
3d2cfdf1 FB |
252 | void term_vprintf(const char *fmt, va_list ap); |
253 | void term_printf(const char *fmt, ...); | |
254 | ||
9307c4c1 FB |
255 | static int monitor_disas_is_physical; |
256 | ||
257 | static int | |
258 | monitor_read_memory (memaddr, myaddr, length, info) | |
259 | bfd_vma memaddr; | |
260 | bfd_byte *myaddr; | |
261 | int length; | |
262 | struct disassemble_info *info; | |
263 | { | |
264 | if (monitor_disas_is_physical) { | |
265 | cpu_physical_memory_rw(memaddr, myaddr, length, 0); | |
266 | } else { | |
267 | cpu_memory_rw_debug(cpu_single_env, memaddr,myaddr, length, 0); | |
268 | } | |
269 | return 0; | |
270 | } | |
271 | ||
3d2cfdf1 FB |
272 | static int monitor_fprintf(FILE *stream, const char *fmt, ...) |
273 | { | |
274 | va_list ap; | |
275 | va_start(ap, fmt); | |
276 | term_vprintf(fmt, ap); | |
277 | va_end(ap); | |
278 | return 0; | |
279 | } | |
280 | ||
9307c4c1 FB |
281 | void monitor_disas(target_ulong pc, int nb_insn, int is_physical, int flags) |
282 | { | |
9307c4c1 FB |
283 | int count, i; |
284 | struct disassemble_info disasm_info; | |
285 | int (*print_insn)(bfd_vma pc, disassemble_info *info); | |
286 | ||
3d2cfdf1 | 287 | INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf); |
9307c4c1 FB |
288 | |
289 | monitor_disas_is_physical = is_physical; | |
290 | disasm_info.read_memory_func = monitor_read_memory; | |
291 | ||
292 | disasm_info.buffer_vma = pc; | |
293 | ||
294 | #ifdef TARGET_WORDS_BIGENDIAN | |
295 | disasm_info.endian = BFD_ENDIAN_BIG; | |
296 | #else | |
297 | disasm_info.endian = BFD_ENDIAN_LITTLE; | |
298 | #endif | |
299 | #if defined(TARGET_I386) | |
fa15e030 FB |
300 | if (flags == 2) |
301 | disasm_info.mach = bfd_mach_x86_64; | |
302 | else if (flags == 1) | |
9307c4c1 | 303 | disasm_info.mach = bfd_mach_i386_i8086; |
fa15e030 FB |
304 | else |
305 | disasm_info.mach = bfd_mach_i386_i386; | |
9307c4c1 FB |
306 | print_insn = print_insn_i386; |
307 | #elif defined(TARGET_ARM) | |
308 | print_insn = print_insn_arm; | |
309 | #elif defined(TARGET_SPARC) | |
310 | print_insn = print_insn_sparc; | |
311 | #elif defined(TARGET_PPC) | |
312 | print_insn = print_insn_ppc; | |
313 | #else | |
7fe48483 | 314 | term_printf("Asm output not supported on this arch\n"); |
9307c4c1 FB |
315 | return; |
316 | #endif | |
317 | ||
318 | for(i = 0; i < nb_insn; i++) { | |
fa15e030 | 319 | term_printf("0x" TARGET_FMT_lx ": ", pc); |
9307c4c1 | 320 | count = print_insn(pc, &disasm_info); |
3d2cfdf1 | 321 | term_printf("\n"); |
9307c4c1 FB |
322 | if (count < 0) |
323 | break; | |
324 | pc += count; | |
325 | } | |
326 | } | |
327 | #endif |