Integrate Alpha target in Qemu core.
[qemu] / disas.c
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 #elif defined(TARGET_ALPHA)
201     disasm_info.mach = bfd_mach_alpha;
202     print_insn = print_insn_alpha;
203 #else
204     fprintf(out, "0x" TARGET_FMT_lx
205             ": Asm output not supported on this arch\n", code);
206     return;
207 #endif
208
209     for (pc = code; pc < code + size; pc += count) {
210         fprintf(out, "0x" TARGET_FMT_lx ":  ", pc);
211         count = print_insn(pc, &disasm_info);
212 #if 0
213         {
214             int i;
215             uint8_t b;
216             fprintf(out, " {");
217             for(i = 0; i < count; i++) {
218                 target_read_memory(pc + i, &b, 1, &disasm_info);
219                 fprintf(out, " %02x", b);
220             }
221             fprintf(out, " }");
222         }
223 #endif
224         fprintf(out, "\n");
225         if (count < 0)
226             break;
227     }
228 }
229
230 /* Disassemble this for me please... (debugging). */
231 void disas(FILE *out, void *code, unsigned long size)
232 {
233     unsigned long pc;
234     int count;
235     struct disassemble_info disasm_info;
236     int (*print_insn)(bfd_vma pc, disassemble_info *info);
237
238     INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
239
240     disasm_info.buffer = code;
241     disasm_info.buffer_vma = (unsigned long)code;
242     disasm_info.buffer_length = size;
243
244 #ifdef WORDS_BIGENDIAN
245     disasm_info.endian = BFD_ENDIAN_BIG;
246 #else
247     disasm_info.endian = BFD_ENDIAN_LITTLE;
248 #endif
249 #if defined(__i386__)
250     disasm_info.mach = bfd_mach_i386_i386;
251     print_insn = print_insn_i386;
252 #elif defined(__x86_64__)
253     disasm_info.mach = bfd_mach_x86_64;
254     print_insn = print_insn_i386;
255 #elif defined(__powerpc__)
256     print_insn = print_insn_ppc;
257 #elif defined(__alpha__)
258     print_insn = print_insn_alpha;
259 #elif defined(__sparc__)
260     print_insn = print_insn_sparc;
261 #elif defined(__arm__) 
262     print_insn = print_insn_arm;
263 #elif defined(__MIPSEB__)
264     print_insn = print_insn_big_mips;
265 #elif defined(__MIPSEL__)
266     print_insn = print_insn_little_mips;
267 #elif defined(__m68k__)
268     print_insn = print_insn_m68k;
269 #else
270     fprintf(out, "0x%lx: Asm output not supported on this arch\n",
271             (long) code);
272     return;
273 #endif
274     for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) {
275         fprintf(out, "0x%08lx:  ", pc);
276 #ifdef __arm__
277         /* since data is included in the code, it is better to
278            display code data too */
279         fprintf(out, "%08x  ", (int)bfd_getl32((const bfd_byte *)pc));
280 #endif
281         count = print_insn(pc, &disasm_info);
282         fprintf(out, "\n");
283         if (count < 0)
284             break;
285     }
286 }
287
288 /* Look up symbol for debugging purpose.  Returns "" if unknown. */
289 const char *lookup_symbol(target_ulong orig_addr)
290 {
291     unsigned int i;
292     /* Hack, because we know this is x86. */
293     Elf32_Sym *sym;
294     struct syminfo *s;
295     target_ulong addr;
296     
297     for (s = syminfos; s; s = s->next) {
298         sym = s->disas_symtab;
299         for (i = 0; i < s->disas_num_syms; i++) {
300             if (sym[i].st_shndx == SHN_UNDEF
301                 || sym[i].st_shndx >= SHN_LORESERVE)
302                 continue;
303
304             if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC)
305                 continue;
306
307             addr = sym[i].st_value;
308 #ifdef TARGET_ARM
309             /* The bottom address bit marks a Thumb symbol.  */
310             addr &= ~(target_ulong)1;
311 #endif
312             if (orig_addr >= addr
313                 && orig_addr < addr + sym[i].st_size)
314                 return s->disas_strtab + sym[i].st_name;
315         }
316     }
317     return "";
318 }
319
320 #if !defined(CONFIG_USER_ONLY)
321
322 void term_vprintf(const char *fmt, va_list ap);
323 void term_printf(const char *fmt, ...);
324
325 static int monitor_disas_is_physical;
326 static CPUState *monitor_disas_env;
327
328 static int
329 monitor_read_memory (memaddr, myaddr, length, info)
330      bfd_vma memaddr;
331      bfd_byte *myaddr;
332      int length;
333      struct disassemble_info *info;
334 {
335     if (monitor_disas_is_physical) {
336         cpu_physical_memory_rw(memaddr, myaddr, length, 0);
337     } else {
338         cpu_memory_rw_debug(monitor_disas_env, memaddr,myaddr, length, 0);
339     }
340     return 0;
341 }
342
343 static int monitor_fprintf(FILE *stream, const char *fmt, ...)
344 {
345     va_list ap;
346     va_start(ap, fmt);
347     term_vprintf(fmt, ap);
348     va_end(ap);
349     return 0;
350 }
351
352 void monitor_disas(CPUState *env,
353                    target_ulong pc, int nb_insn, int is_physical, int flags)
354 {
355     int count, i;
356     struct disassemble_info disasm_info;
357     int (*print_insn)(bfd_vma pc, disassemble_info *info);
358
359     INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf);
360
361     monitor_disas_env = env;
362     monitor_disas_is_physical = is_physical;
363     disasm_info.read_memory_func = monitor_read_memory;
364
365     disasm_info.buffer_vma = pc;
366
367 #ifdef TARGET_WORDS_BIGENDIAN
368     disasm_info.endian = BFD_ENDIAN_BIG;
369 #else
370     disasm_info.endian = BFD_ENDIAN_LITTLE;
371 #endif
372 #if defined(TARGET_I386)
373     if (flags == 2)
374         disasm_info.mach = bfd_mach_x86_64;
375     else if (flags == 1) 
376         disasm_info.mach = bfd_mach_i386_i8086;
377     else
378         disasm_info.mach = bfd_mach_i386_i386;
379     print_insn = print_insn_i386;
380 #elif defined(TARGET_ARM)
381     print_insn = print_insn_arm;
382 #elif defined(TARGET_SPARC)
383     print_insn = print_insn_sparc;
384 #elif defined(TARGET_PPC)
385 #ifdef TARGET_PPC64
386     disasm_info.mach = bfd_mach_ppc64;
387 #else
388     disasm_info.mach = bfd_mach_ppc;
389 #endif
390     print_insn = print_insn_ppc;
391 #elif defined(TARGET_M68K)
392     print_insn = print_insn_m68k;
393 #elif defined(TARGET_MIPS)
394 #ifdef TARGET_WORDS_BIGENDIAN
395     print_insn = print_insn_big_mips;
396 #else
397     print_insn = print_insn_little_mips;
398 #endif
399 #else
400     term_printf("0x" TARGET_FMT_lx
401                 ": Asm output not supported on this arch\n", pc);
402     return;
403 #endif
404
405     for(i = 0; i < nb_insn; i++) {
406         term_printf("0x" TARGET_FMT_lx ":  ", pc);
407         count = print_insn(pc, &disasm_info);
408         term_printf("\n");
409         if (count < 0)
410             break;
411         pc += count;
412     }
413 }
414 #endif