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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 | |
b8076a74 FB |
146 | fprintf(out, "0x" TARGET_FMT_lx |
147 | ": Asm output not supported on this arch\n", code); | |
c27004ec | 148 | return; |
c6105c0a FB |
149 | #endif |
150 | ||
c27004ec | 151 | for (pc = code; pc < code + size; pc += count) { |
fa15e030 | 152 | fprintf(out, "0x" TARGET_FMT_lx ": ", pc); |
c27004ec FB |
153 | count = print_insn(pc, &disasm_info); |
154 | #if 0 | |
155 | { | |
156 | int i; | |
157 | uint8_t b; | |
158 | fprintf(out, " {"); | |
159 | for(i = 0; i < count; i++) { | |
160 | target_read_memory(pc + i, &b, 1, &disasm_info); | |
161 | fprintf(out, " %02x", b); | |
162 | } | |
163 | fprintf(out, " }"); | |
164 | } | |
165 | #endif | |
166 | fprintf(out, "\n"); | |
167 | if (count < 0) | |
168 | break; | |
169 | } | |
170 | } | |
171 | ||
172 | /* Disassemble this for me please... (debugging). */ | |
173 | void disas(FILE *out, void *code, unsigned long size) | |
174 | { | |
175 | unsigned long pc; | |
176 | int count; | |
177 | struct disassemble_info disasm_info; | |
178 | int (*print_insn)(bfd_vma pc, disassemble_info *info); | |
179 | ||
180 | INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf); | |
181 | ||
b9adb4a6 FB |
182 | disasm_info.buffer = code; |
183 | disasm_info.buffer_vma = (unsigned long)code; | |
184 | disasm_info.buffer_length = size; | |
185 | ||
b9adb4a6 | 186 | #ifdef WORDS_BIGENDIAN |
c27004ec | 187 | disasm_info.endian = BFD_ENDIAN_BIG; |
b9adb4a6 | 188 | #else |
c27004ec | 189 | disasm_info.endian = BFD_ENDIAN_LITTLE; |
b9adb4a6 | 190 | #endif |
bc51c5c9 | 191 | #if defined(__i386__) |
c27004ec FB |
192 | disasm_info.mach = bfd_mach_i386_i386; |
193 | print_insn = print_insn_i386; | |
bc51c5c9 | 194 | #elif defined(__x86_64__) |
c27004ec FB |
195 | disasm_info.mach = bfd_mach_x86_64; |
196 | print_insn = print_insn_i386; | |
b9adb4a6 | 197 | #elif defined(__powerpc__) |
c27004ec | 198 | print_insn = print_insn_ppc; |
a993ba85 | 199 | #elif defined(__alpha__) |
c27004ec | 200 | print_insn = print_insn_alpha; |
aa0aa4fa | 201 | #elif defined(__sparc__) |
c27004ec | 202 | print_insn = print_insn_sparc; |
aa0aa4fa | 203 | #elif defined(__arm__) |
c27004ec | 204 | print_insn = print_insn_arm; |
b9adb4a6 | 205 | #else |
b8076a74 FB |
206 | fprintf(out, "0x%lx: Asm output not supported on this arch\n", |
207 | (long) code); | |
c27004ec | 208 | return; |
b9adb4a6 | 209 | #endif |
c27004ec FB |
210 | for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) { |
211 | fprintf(out, "0x%08lx: ", pc); | |
aa0aa4fa FB |
212 | #ifdef __arm__ |
213 | /* since data are included in the code, it is better to | |
214 | display code data too */ | |
95cbfc64 | 215 | if (is_host) { |
aa0aa4fa FB |
216 | fprintf(out, "%08x ", (int)bfd_getl32((const bfd_byte *)pc)); |
217 | } | |
218 | #endif | |
c27004ec | 219 | count = print_insn(pc, &disasm_info); |
b9adb4a6 FB |
220 | fprintf(out, "\n"); |
221 | if (count < 0) | |
222 | break; | |
223 | } | |
224 | } | |
225 | ||
226 | /* Look up symbol for debugging purpose. Returns "" if unknown. */ | |
c27004ec | 227 | const char *lookup_symbol(target_ulong orig_addr) |
b9adb4a6 FB |
228 | { |
229 | unsigned int i; | |
230 | /* Hack, because we know this is x86. */ | |
e80cfcfc FB |
231 | Elf32_Sym *sym; |
232 | struct syminfo *s; | |
233 | ||
234 | for (s = syminfos; s; s = s->next) { | |
235 | sym = s->disas_symtab; | |
236 | for (i = 0; i < s->disas_num_syms; i++) { | |
237 | if (sym[i].st_shndx == SHN_UNDEF | |
238 | || sym[i].st_shndx >= SHN_LORESERVE) | |
239 | continue; | |
b9adb4a6 | 240 | |
e80cfcfc FB |
241 | if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC) |
242 | continue; | |
b9adb4a6 | 243 | |
c27004ec FB |
244 | if (orig_addr >= sym[i].st_value |
245 | && orig_addr < sym[i].st_value + sym[i].st_size) | |
e80cfcfc FB |
246 | return s->disas_strtab + sym[i].st_name; |
247 | } | |
b9adb4a6 FB |
248 | } |
249 | return ""; | |
250 | } | |
9307c4c1 FB |
251 | |
252 | #if !defined(CONFIG_USER_ONLY) | |
253 | ||
3d2cfdf1 FB |
254 | void term_vprintf(const char *fmt, va_list ap); |
255 | void term_printf(const char *fmt, ...); | |
256 | ||
9307c4c1 FB |
257 | static int monitor_disas_is_physical; |
258 | ||
259 | static int | |
260 | monitor_read_memory (memaddr, myaddr, length, info) | |
261 | bfd_vma memaddr; | |
262 | bfd_byte *myaddr; | |
263 | int length; | |
264 | struct disassemble_info *info; | |
265 | { | |
266 | if (monitor_disas_is_physical) { | |
267 | cpu_physical_memory_rw(memaddr, myaddr, length, 0); | |
268 | } else { | |
269 | cpu_memory_rw_debug(cpu_single_env, memaddr,myaddr, length, 0); | |
270 | } | |
271 | return 0; | |
272 | } | |
273 | ||
3d2cfdf1 FB |
274 | static int monitor_fprintf(FILE *stream, const char *fmt, ...) |
275 | { | |
276 | va_list ap; | |
277 | va_start(ap, fmt); | |
278 | term_vprintf(fmt, ap); | |
279 | va_end(ap); | |
280 | return 0; | |
281 | } | |
282 | ||
9307c4c1 FB |
283 | void monitor_disas(target_ulong pc, int nb_insn, int is_physical, int flags) |
284 | { | |
9307c4c1 FB |
285 | int count, i; |
286 | struct disassemble_info disasm_info; | |
287 | int (*print_insn)(bfd_vma pc, disassemble_info *info); | |
288 | ||
3d2cfdf1 | 289 | INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf); |
9307c4c1 FB |
290 | |
291 | monitor_disas_is_physical = is_physical; | |
292 | disasm_info.read_memory_func = monitor_read_memory; | |
293 | ||
294 | disasm_info.buffer_vma = pc; | |
295 | ||
296 | #ifdef TARGET_WORDS_BIGENDIAN | |
297 | disasm_info.endian = BFD_ENDIAN_BIG; | |
298 | #else | |
299 | disasm_info.endian = BFD_ENDIAN_LITTLE; | |
300 | #endif | |
301 | #if defined(TARGET_I386) | |
fa15e030 FB |
302 | if (flags == 2) |
303 | disasm_info.mach = bfd_mach_x86_64; | |
304 | else if (flags == 1) | |
9307c4c1 | 305 | disasm_info.mach = bfd_mach_i386_i8086; |
fa15e030 FB |
306 | else |
307 | disasm_info.mach = bfd_mach_i386_i386; | |
9307c4c1 FB |
308 | print_insn = print_insn_i386; |
309 | #elif defined(TARGET_ARM) | |
310 | print_insn = print_insn_arm; | |
311 | #elif defined(TARGET_SPARC) | |
312 | print_insn = print_insn_sparc; | |
313 | #elif defined(TARGET_PPC) | |
314 | print_insn = print_insn_ppc; | |
315 | #else | |
b8076a74 FB |
316 | term_printf("0x" TARGET_FMT_lx |
317 | ": Asm output not supported on this arch\n", pc); | |
9307c4c1 FB |
318 | return; |
319 | #endif | |
320 | ||
321 | for(i = 0; i < nb_insn; i++) { | |
fa15e030 | 322 | term_printf("0x" TARGET_FMT_lx ": ", pc); |
9307c4c1 | 323 | count = print_insn(pc, &disasm_info); |
3d2cfdf1 | 324 | term_printf("\n"); |
9307c4c1 FB |
325 | if (count < 0) |
326 | break; | |
327 | pc += count; | |
328 | } | |
329 | } | |
330 | #endif |