1/* General "disassemble this chunk" code.  Used for debugging. */
2#include "config.h"
3#include "disas/bfd.h"
4#include "elf.h"
5#include <errno.h>
6
7#include "cpu.h"
8#include "disas/disas.h"
9
10typedef struct CPUDebug {
11    struct disassemble_info info;
12    CPUArchState *env;
13} CPUDebug;
14
15/* Filled in by elfload.c.  Simplistic, but will do for now. */
16struct syminfo *syminfos = NULL;
17
18/* Get LENGTH bytes from info's buffer, at target address memaddr.
19   Transfer them to myaddr.  */
20int
21buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
22                   struct disassemble_info *info)
23{
24    if (memaddr < info->buffer_vma
25        || memaddr + length > info->buffer_vma + info->buffer_length)
26        /* Out of bounds.  Use EIO because GDB uses it.  */
27        return EIO;
28    memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
29    return 0;
30}
31
32/* Get LENGTH bytes from info's buffer, at target address memaddr.
33   Transfer them to myaddr.  */
34static int
35target_read_memory (bfd_vma memaddr,
36                    bfd_byte *myaddr,
37                    int length,
38                    struct disassemble_info *info)
39{
40    CPUDebug *s = container_of(info, CPUDebug, info);
41
42    cpu_memory_rw_debug(ENV_GET_CPU(s->env), memaddr, myaddr, length, 0);
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.  */
48void
49perror_memory (int status, bfd_vma memaddr, struct disassemble_info *info)
50{
51  if (status != EIO)
52    /* Can't happen.  */
53    (*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
54  else
55    /* Actually, address between memaddr and memaddr + len was
56       out of bounds.  */
57    (*info->fprintf_func) (info->stream,
58			   "Address 0x%" PRIx64 " is out of bounds.\n", memaddr);
59}
60
61/* This could be in a separate file, to save minuscule amounts of space
62   in statically linked executables.  */
63
64/* Just print the address is hex.  This is included for completeness even
65   though both GDB and objdump provide their own (to print symbolic
66   addresses).  */
67
68void
69generic_print_address (bfd_vma addr, struct disassemble_info *info)
70{
71    (*info->fprintf_func) (info->stream, "0x%" PRIx64, addr);
72}
73
74/* Print address in hex, truncated to the width of a target virtual address. */
75static void
76generic_print_target_address(bfd_vma addr, struct disassemble_info *info)
77{
78    uint64_t mask = ~0ULL >> (64 - TARGET_VIRT_ADDR_SPACE_BITS);
79    generic_print_address(addr & mask, info);
80}
81
82/* Print address in hex, truncated to the width of a host virtual address. */
83static void
84generic_print_host_address(bfd_vma addr, struct disassemble_info *info)
85{
86    uint64_t mask = ~0ULL >> (64 - (sizeof(void *) * 8));
87    generic_print_address(addr & mask, info);
88}
89
90/* Just return the given address.  */
91
92int
93generic_symbol_at_address (bfd_vma addr, struct disassemble_info *info)
94{
95  return 1;
96}
97
98bfd_vma bfd_getl64 (const bfd_byte *addr)
99{
100  unsigned long long v;
101
102  v = (unsigned long long) addr[0];
103  v |= (unsigned long long) addr[1] << 8;
104  v |= (unsigned long long) addr[2] << 16;
105  v |= (unsigned long long) addr[3] << 24;
106  v |= (unsigned long long) addr[4] << 32;
107  v |= (unsigned long long) addr[5] << 40;
108  v |= (unsigned long long) addr[6] << 48;
109  v |= (unsigned long long) addr[7] << 56;
110  return (bfd_vma) v;
111}
112
113bfd_vma bfd_getl32 (const bfd_byte *addr)
114{
115  unsigned long v;
116
117  v = (unsigned long) addr[0];
118  v |= (unsigned long) addr[1] << 8;
119  v |= (unsigned long) addr[2] << 16;
120  v |= (unsigned long) addr[3] << 24;
121  return (bfd_vma) v;
122}
123
124bfd_vma bfd_getb32 (const bfd_byte *addr)
125{
126  unsigned long v;
127
128  v = (unsigned long) addr[0] << 24;
129  v |= (unsigned long) addr[1] << 16;
130  v |= (unsigned long) addr[2] << 8;
131  v |= (unsigned long) addr[3];
132  return (bfd_vma) v;
133}
134
135bfd_vma bfd_getl16 (const bfd_byte *addr)
136{
137  unsigned long v;
138
139  v = (unsigned long) addr[0];
140  v |= (unsigned long) addr[1] << 8;
141  return (bfd_vma) v;
142}
143
144bfd_vma bfd_getb16 (const bfd_byte *addr)
145{
146  unsigned long v;
147
148  v = (unsigned long) addr[0] << 24;
149  v |= (unsigned long) addr[1] << 16;
150  return (bfd_vma) v;
151}
152
153#ifdef TARGET_ARM
154static int
155print_insn_thumb1(bfd_vma pc, disassemble_info *info)
156{
157  return print_insn_arm(pc | 1, info);
158}
159#endif
160
161static int print_insn_objdump(bfd_vma pc, disassemble_info *info,
162                              const char *prefix)
163{
164    int i, n = info->buffer_length;
165    uint8_t *buf = g_malloc(n);
166
167    info->read_memory_func(pc, buf, n, info);
168
169    for (i = 0; i < n; ++i) {
170        if (i % 32 == 0) {
171            info->fprintf_func(info->stream, "\n%s: ", prefix);
172        }
173        info->fprintf_func(info->stream, "%02x", buf[i]);
174    }
175
176    g_free(buf);
177    return n;
178}
179
180static int print_insn_od_host(bfd_vma pc, disassemble_info *info)
181{
182    return print_insn_objdump(pc, info, "OBJD-H");
183}
184
185static int print_insn_od_target(bfd_vma pc, disassemble_info *info)
186{
187    return print_insn_objdump(pc, info, "OBJD-T");
188}
189
190/* Disassemble this for me please... (debugging). 'flags' has the following
191   values:
192    i386 - 1 means 16 bit code, 2 means 64 bit code
193    arm  - bit 0 = thumb, bit 1 = reverse endian
194    ppc  - nonzero means little endian
195    other targets - unused
196 */
197void target_disas(FILE *out, CPUArchState *env, target_ulong code,
198                  target_ulong size, int flags)
199{
200    target_ulong pc;
201    int count;
202    CPUDebug s;
203    int (*print_insn)(bfd_vma pc, disassemble_info *info) = NULL;
204
205    INIT_DISASSEMBLE_INFO(s.info, out, fprintf);
206
207    s.env = env;
208    s.info.read_memory_func = target_read_memory;
209    s.info.buffer_vma = code;
210    s.info.buffer_length = size;
211    s.info.print_address_func = generic_print_target_address;
212
213#ifdef TARGET_WORDS_BIGENDIAN
214    s.info.endian = BFD_ENDIAN_BIG;
215#else
216    s.info.endian = BFD_ENDIAN_LITTLE;
217#endif
218#if defined(TARGET_I386)
219    if (flags == 2) {
220        s.info.mach = bfd_mach_x86_64;
221    } else if (flags == 1) {
222        s.info.mach = bfd_mach_i386_i8086;
223    } else {
224        s.info.mach = bfd_mach_i386_i386;
225    }
226    print_insn = print_insn_i386;
227#elif defined(TARGET_ARM)
228    if (flags & 1) {
229        print_insn = print_insn_thumb1;
230    } else {
231        print_insn = print_insn_arm;
232    }
233    if (flags & 2) {
234#ifdef TARGET_WORDS_BIGENDIAN
235        s.info.endian = BFD_ENDIAN_LITTLE;
236#else
237        s.info.endian = BFD_ENDIAN_BIG;
238#endif
239    }
240#elif defined(TARGET_SPARC)
241    print_insn = print_insn_sparc;
242#ifdef TARGET_SPARC64
243    s.info.mach = bfd_mach_sparc_v9b;
244#endif
245#elif defined(TARGET_PPC)
246    if (flags >> 16) {
247        s.info.endian = BFD_ENDIAN_LITTLE;
248    }
249    if (flags & 0xFFFF) {
250        /* If we have a precise definitions of the instructions set, use it */
251        s.info.mach = flags & 0xFFFF;
252    } else {
253#ifdef TARGET_PPC64
254        s.info.mach = bfd_mach_ppc64;
255#else
256        s.info.mach = bfd_mach_ppc;
257#endif
258    }
259    s.info.disassembler_options = (char *)"any";
260    print_insn = print_insn_ppc;
261#elif defined(TARGET_M68K)
262    print_insn = print_insn_m68k;
263#elif defined(TARGET_MIPS)
264#ifdef TARGET_WORDS_BIGENDIAN
265    print_insn = print_insn_big_mips;
266#else
267    print_insn = print_insn_little_mips;
268#endif
269#elif defined(TARGET_SH4)
270    s.info.mach = bfd_mach_sh4;
271    print_insn = print_insn_sh;
272#elif defined(TARGET_ALPHA)
273    s.info.mach = bfd_mach_alpha_ev6;
274    print_insn = print_insn_alpha;
275#elif defined(TARGET_CRIS)
276    if (flags != 32) {
277        s.info.mach = bfd_mach_cris_v0_v10;
278        print_insn = print_insn_crisv10;
279    } else {
280        s.info.mach = bfd_mach_cris_v32;
281        print_insn = print_insn_crisv32;
282    }
283#elif defined(TARGET_S390X)
284    s.info.mach = bfd_mach_s390_64;
285    print_insn = print_insn_s390;
286#elif defined(TARGET_MICROBLAZE)
287    s.info.mach = bfd_arch_microblaze;
288    print_insn = print_insn_microblaze;
289#elif defined(TARGET_MOXIE)
290    s.info.mach = bfd_arch_moxie;
291    print_insn = print_insn_moxie;
292#elif defined(TARGET_LM32)
293    s.info.mach = bfd_mach_lm32;
294    print_insn = print_insn_lm32;
295#endif
296    if (print_insn == NULL) {
297        print_insn = print_insn_od_target;
298    }
299
300    for (pc = code; size > 0; pc += count, size -= count) {
301	fprintf(out, "0x" TARGET_FMT_lx ":  ", pc);
302	count = print_insn(pc, &s.info);
303#if 0
304        {
305            int i;
306            uint8_t b;
307            fprintf(out, " {");
308            for(i = 0; i < count; i++) {
309                target_read_memory(pc + i, &b, 1, &s.info);
310                fprintf(out, " %02x", b);
311            }
312            fprintf(out, " }");
313        }
314#endif
315	fprintf(out, "\n");
316	if (count < 0)
317	    break;
318        if (size < count) {
319            fprintf(out,
320                    "Disassembler disagrees with translator over instruction "
321                    "decoding\n"
322                    "Please report this to qemu-devel@nongnu.org\n");
323            break;
324        }
325    }
326}
327
328/* Disassemble this for me please... (debugging). */
329void disas(FILE *out, void *code, unsigned long size)
330{
331    uintptr_t pc;
332    int count;
333    CPUDebug s;
334    int (*print_insn)(bfd_vma pc, disassemble_info *info) = NULL;
335
336    INIT_DISASSEMBLE_INFO(s.info, out, fprintf);
337    s.info.print_address_func = generic_print_host_address;
338
339    s.info.buffer = code;
340    s.info.buffer_vma = (uintptr_t)code;
341    s.info.buffer_length = size;
342
343#ifdef HOST_WORDS_BIGENDIAN
344    s.info.endian = BFD_ENDIAN_BIG;
345#else
346    s.info.endian = BFD_ENDIAN_LITTLE;
347#endif
348#if defined(CONFIG_TCG_INTERPRETER)
349    print_insn = print_insn_tci;
350#elif defined(__i386__)
351    s.info.mach = bfd_mach_i386_i386;
352    print_insn = print_insn_i386;
353#elif defined(__x86_64__)
354    s.info.mach = bfd_mach_x86_64;
355    print_insn = print_insn_i386;
356#elif defined(_ARCH_PPC)
357    s.info.disassembler_options = (char *)"any";
358    print_insn = print_insn_ppc;
359#elif defined(__alpha__)
360    print_insn = print_insn_alpha;
361#elif defined(__sparc__)
362    print_insn = print_insn_sparc;
363    s.info.mach = bfd_mach_sparc_v9b;
364#elif defined(__arm__)
365    print_insn = print_insn_arm;
366#elif defined(__MIPSEB__)
367    print_insn = print_insn_big_mips;
368#elif defined(__MIPSEL__)
369    print_insn = print_insn_little_mips;
370#elif defined(__m68k__)
371    print_insn = print_insn_m68k;
372#elif defined(__s390__)
373    print_insn = print_insn_s390;
374#elif defined(__hppa__)
375    print_insn = print_insn_hppa;
376#elif defined(__ia64__)
377    print_insn = print_insn_ia64;
378#endif
379    if (print_insn == NULL) {
380        print_insn = print_insn_od_host;
381    }
382    for (pc = (uintptr_t)code; size > 0; pc += count, size -= count) {
383        fprintf(out, "0x%08" PRIxPTR ":  ", pc);
384        count = print_insn(pc, &s.info);
385	fprintf(out, "\n");
386	if (count < 0)
387	    break;
388    }
389}
390
391/* Look up symbol for debugging purpose.  Returns "" if unknown. */
392const char *lookup_symbol(target_ulong orig_addr)
393{
394    const char *symbol = "";
395    struct syminfo *s;
396
397    for (s = syminfos; s; s = s->next) {
398        symbol = s->lookup_symbol(s, orig_addr);
399        if (symbol[0] != '\0') {
400            break;
401        }
402    }
403
404    return symbol;
405}
406
407#if !defined(CONFIG_USER_ONLY)
408
409#include "monitor/monitor.h"
410
411static int monitor_disas_is_physical;
412
413static int
414monitor_read_memory (bfd_vma memaddr, bfd_byte *myaddr, int length,
415                     struct disassemble_info *info)
416{
417    CPUDebug *s = container_of(info, CPUDebug, info);
418
419    if (monitor_disas_is_physical) {
420        cpu_physical_memory_read(memaddr, myaddr, length);
421    } else {
422        cpu_memory_rw_debug(ENV_GET_CPU(s->env), memaddr,myaddr, length, 0);
423    }
424    return 0;
425}
426
427static int GCC_FMT_ATTR(2, 3)
428monitor_fprintf(FILE *stream, const char *fmt, ...)
429{
430    va_list ap;
431    va_start(ap, fmt);
432    monitor_vprintf((Monitor *)stream, fmt, ap);
433    va_end(ap);
434    return 0;
435}
436
437void monitor_disas(Monitor *mon, CPUArchState *env,
438                   target_ulong pc, int nb_insn, int is_physical, int flags)
439{
440    int count, i;
441    CPUDebug s;
442    int (*print_insn)(bfd_vma pc, disassemble_info *info);
443
444    INIT_DISASSEMBLE_INFO(s.info, (FILE *)mon, monitor_fprintf);
445
446    s.env = env;
447    monitor_disas_is_physical = is_physical;
448    s.info.read_memory_func = monitor_read_memory;
449    s.info.print_address_func = generic_print_target_address;
450
451    s.info.buffer_vma = pc;
452
453#ifdef TARGET_WORDS_BIGENDIAN
454    s.info.endian = BFD_ENDIAN_BIG;
455#else
456    s.info.endian = BFD_ENDIAN_LITTLE;
457#endif
458#if defined(TARGET_I386)
459    if (flags == 2) {
460        s.info.mach = bfd_mach_x86_64;
461    } else if (flags == 1) {
462        s.info.mach = bfd_mach_i386_i8086;
463    } else {
464        s.info.mach = bfd_mach_i386_i386;
465    }
466    print_insn = print_insn_i386;
467#elif defined(TARGET_ARM)
468    print_insn = print_insn_arm;
469#elif defined(TARGET_ALPHA)
470    print_insn = print_insn_alpha;
471#elif defined(TARGET_SPARC)
472    print_insn = print_insn_sparc;
473#ifdef TARGET_SPARC64
474    s.info.mach = bfd_mach_sparc_v9b;
475#endif
476#elif defined(TARGET_PPC)
477#ifdef TARGET_PPC64
478    s.info.mach = bfd_mach_ppc64;
479#else
480    s.info.mach = bfd_mach_ppc;
481#endif
482    print_insn = print_insn_ppc;
483#elif defined(TARGET_M68K)
484    print_insn = print_insn_m68k;
485#elif defined(TARGET_MIPS)
486#ifdef TARGET_WORDS_BIGENDIAN
487    print_insn = print_insn_big_mips;
488#else
489    print_insn = print_insn_little_mips;
490#endif
491#elif defined(TARGET_SH4)
492    s.info.mach = bfd_mach_sh4;
493    print_insn = print_insn_sh;
494#elif defined(TARGET_S390X)
495    s.info.mach = bfd_mach_s390_64;
496    print_insn = print_insn_s390;
497#elif defined(TARGET_MOXIE)
498    s.info.mach = bfd_arch_moxie;
499    print_insn = print_insn_moxie;
500#elif defined(TARGET_LM32)
501    s.info.mach = bfd_mach_lm32;
502    print_insn = print_insn_lm32;
503#else
504    monitor_printf(mon, "0x" TARGET_FMT_lx
505                   ": Asm output not supported on this arch\n", pc);
506    return;
507#endif
508
509    for(i = 0; i < nb_insn; i++) {
510	monitor_printf(mon, "0x" TARGET_FMT_lx ":  ", pc);
511        count = print_insn(pc, &s.info);
512	monitor_printf(mon, "\n");
513	if (count < 0)
514	    break;
515        pc += count;
516    }
517}
518#endif
519