Annotation of qemu/disas.c, revision 1.1.1.7

1.1       root        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
1.1.1.7 ! root       17: buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
        !            18:                    struct disassemble_info *info)
1.1       root       19: {
                     20:     if (memaddr < info->buffer_vma
                     21:         || memaddr + length > info->buffer_vma + info->buffer_length)
                     22:         /* Out of bounds.  Use EIO because GDB uses it.  */
                     23:         return EIO;
                     24:     memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
                     25:     return 0;
                     26: }
                     27: 
                     28: /* Get LENGTH bytes from info's buffer, at target address memaddr.
                     29:    Transfer them to myaddr.  */
                     30: static int
                     31: target_read_memory (bfd_vma memaddr,
                     32:                     bfd_byte *myaddr,
                     33:                     int length,
                     34:                     struct disassemble_info *info)
                     35: {
                     36:     int i;
                     37:     for(i = 0; i < length; i++) {
                     38:         myaddr[i] = ldub_code(memaddr + i);
                     39:     }
                     40:     return 0;
                     41: }
                     42: 
                     43: /* Print an error message.  We can assume that this is in response to
                     44:    an error return from buffer_read_memory.  */
                     45: void
1.1.1.7 ! root       46: perror_memory (int status, bfd_vma memaddr, struct disassemble_info *info)
1.1       root       47: {
                     48:   if (status != EIO)
                     49:     /* Can't happen.  */
                     50:     (*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
                     51:   else
                     52:     /* Actually, address between memaddr and memaddr + len was
                     53:        out of bounds.  */
                     54:     (*info->fprintf_func) (info->stream,
1.1.1.4   root       55:                           "Address 0x%" PRIx64 " is out of bounds.\n", memaddr);
1.1       root       56: }
                     57: 
                     58: /* This could be in a separate file, to save miniscule amounts of space
                     59:    in statically linked executables.  */
                     60: 
                     61: /* Just print the address is hex.  This is included for completeness even
                     62:    though both GDB and objdump provide their own (to print symbolic
                     63:    addresses).  */
                     64: 
                     65: void
1.1.1.7 ! root       66: generic_print_address (bfd_vma addr, struct disassemble_info *info)
1.1       root       67: {
1.1.1.4   root       68:     (*info->fprintf_func) (info->stream, "0x%" PRIx64, addr);
1.1       root       69: }
                     70: 
                     71: /* Just return the given address.  */
                     72: 
                     73: int
1.1.1.7 ! root       74: generic_symbol_at_address (bfd_vma addr, struct disassemble_info *info)
1.1       root       75: {
                     76:   return 1;
                     77: }
                     78: 
                     79: bfd_vma bfd_getl32 (const bfd_byte *addr)
                     80: {
                     81:   unsigned long v;
                     82: 
                     83:   v = (unsigned long) addr[0];
                     84:   v |= (unsigned long) addr[1] << 8;
                     85:   v |= (unsigned long) addr[2] << 16;
                     86:   v |= (unsigned long) addr[3] << 24;
                     87:   return (bfd_vma) v;
                     88: }
                     89: 
                     90: bfd_vma bfd_getb32 (const bfd_byte *addr)
                     91: {
                     92:   unsigned long v;
                     93: 
                     94:   v = (unsigned long) addr[0] << 24;
                     95:   v |= (unsigned long) addr[1] << 16;
                     96:   v |= (unsigned long) addr[2] << 8;
                     97:   v |= (unsigned long) addr[3];
                     98:   return (bfd_vma) v;
                     99: }
                    100: 
                    101: bfd_vma bfd_getl16 (const bfd_byte *addr)
                    102: {
                    103:   unsigned long v;
                    104: 
                    105:   v = (unsigned long) addr[0];
                    106:   v |= (unsigned long) addr[1] << 8;
                    107:   return (bfd_vma) v;
                    108: }
                    109: 
                    110: bfd_vma bfd_getb16 (const bfd_byte *addr)
                    111: {
                    112:   unsigned long v;
                    113: 
                    114:   v = (unsigned long) addr[0] << 24;
                    115:   v |= (unsigned long) addr[1] << 16;
                    116:   return (bfd_vma) v;
                    117: }
                    118: 
                    119: #ifdef TARGET_ARM
                    120: static int
                    121: print_insn_thumb1(bfd_vma pc, disassemble_info *info)
                    122: {
                    123:   return print_insn_arm(pc | 1, info);
                    124: }
                    125: #endif
                    126: 
1.1.1.6   root      127: /* Disassemble this for me please... (debugging). 'flags' has the following
1.1       root      128:    values:
                    129:     i386 - nonzero means 16 bit code
1.1.1.6   root      130:     arm  - nonzero means thumb code
1.1.1.2   root      131:     ppc  - nonzero means little endian
1.1       root      132:     other targets - unused
                    133:  */
                    134: void target_disas(FILE *out, target_ulong code, target_ulong size, int flags)
                    135: {
                    136:     target_ulong pc;
                    137:     int count;
                    138:     struct disassemble_info disasm_info;
                    139:     int (*print_insn)(bfd_vma pc, disassemble_info *info);
                    140: 
                    141:     INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
                    142: 
                    143:     disasm_info.read_memory_func = target_read_memory;
                    144:     disasm_info.buffer_vma = code;
                    145:     disasm_info.buffer_length = size;
                    146: 
                    147: #ifdef TARGET_WORDS_BIGENDIAN
                    148:     disasm_info.endian = BFD_ENDIAN_BIG;
                    149: #else
                    150:     disasm_info.endian = BFD_ENDIAN_LITTLE;
                    151: #endif
                    152: #if defined(TARGET_I386)
                    153:     if (flags == 2)
                    154:         disasm_info.mach = bfd_mach_x86_64;
1.1.1.6   root      155:     else if (flags == 1)
1.1       root      156:         disasm_info.mach = bfd_mach_i386_i8086;
                    157:     else
                    158:         disasm_info.mach = bfd_mach_i386_i386;
                    159:     print_insn = print_insn_i386;
                    160: #elif defined(TARGET_ARM)
                    161:     if (flags)
                    162:        print_insn = print_insn_thumb1;
                    163:     else
                    164:        print_insn = print_insn_arm;
                    165: #elif defined(TARGET_SPARC)
                    166:     print_insn = print_insn_sparc;
                    167: #ifdef TARGET_SPARC64
                    168:     disasm_info.mach = bfd_mach_sparc_v9b;
1.1.1.6   root      169: #endif
1.1       root      170: #elif defined(TARGET_PPC)
1.1.1.6   root      171:     if (flags >> 16)
1.1       root      172:         disasm_info.endian = BFD_ENDIAN_LITTLE;
1.1.1.6   root      173:     if (flags & 0xFFFF) {
                    174:         /* If we have a precise definitions of the instructions set, use it */
                    175:         disasm_info.mach = flags & 0xFFFF;
                    176:     } else {
1.1       root      177: #ifdef TARGET_PPC64
1.1.1.6   root      178:         disasm_info.mach = bfd_mach_ppc64;
1.1       root      179: #else
1.1.1.6   root      180:         disasm_info.mach = bfd_mach_ppc;
1.1       root      181: #endif
1.1.1.6   root      182:     }
1.1       root      183:     print_insn = print_insn_ppc;
1.1.1.5   root      184: #elif defined(TARGET_M68K)
                    185:     print_insn = print_insn_m68k;
1.1       root      186: #elif defined(TARGET_MIPS)
1.1.1.2   root      187: #ifdef TARGET_WORDS_BIGENDIAN
1.1       root      188:     print_insn = print_insn_big_mips;
                    189: #else
1.1.1.2   root      190:     print_insn = print_insn_little_mips;
                    191: #endif
1.1.1.3   root      192: #elif defined(TARGET_SH4)
                    193:     disasm_info.mach = bfd_mach_sh4;
                    194:     print_insn = print_insn_sh;
1.1.1.6   root      195: #elif defined(TARGET_ALPHA)
                    196:     disasm_info.mach = bfd_mach_alpha;
                    197:     print_insn = print_insn_alpha;
                    198: #elif defined(TARGET_CRIS)
                    199:     disasm_info.mach = bfd_mach_cris_v32;
                    200:     print_insn = print_insn_crisv32;
1.1.1.2   root      201: #else
1.1       root      202:     fprintf(out, "0x" TARGET_FMT_lx
                    203:            ": Asm output not supported on this arch\n", code);
                    204:     return;
                    205: #endif
                    206: 
1.1.1.7 ! root      207:     for (pc = code; size > 0; pc += count, size -= count) {
1.1       root      208:        fprintf(out, "0x" TARGET_FMT_lx ":  ", pc);
                    209:        count = print_insn(pc, &disasm_info);
                    210: #if 0
                    211:         {
                    212:             int i;
                    213:             uint8_t b;
                    214:             fprintf(out, " {");
                    215:             for(i = 0; i < count; i++) {
                    216:                 target_read_memory(pc + i, &b, 1, &disasm_info);
                    217:                 fprintf(out, " %02x", b);
                    218:             }
                    219:             fprintf(out, " }");
                    220:         }
                    221: #endif
                    222:        fprintf(out, "\n");
                    223:        if (count < 0)
                    224:            break;
                    225:     }
                    226: }
                    227: 
                    228: /* Disassemble this for me please... (debugging). */
                    229: void disas(FILE *out, void *code, unsigned long size)
                    230: {
                    231:     unsigned long pc;
                    232:     int count;
                    233:     struct disassemble_info disasm_info;
                    234:     int (*print_insn)(bfd_vma pc, disassemble_info *info);
                    235: 
                    236:     INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
                    237: 
                    238:     disasm_info.buffer = code;
                    239:     disasm_info.buffer_vma = (unsigned long)code;
                    240:     disasm_info.buffer_length = size;
                    241: 
                    242: #ifdef WORDS_BIGENDIAN
                    243:     disasm_info.endian = BFD_ENDIAN_BIG;
                    244: #else
                    245:     disasm_info.endian = BFD_ENDIAN_LITTLE;
                    246: #endif
                    247: #if defined(__i386__)
                    248:     disasm_info.mach = bfd_mach_i386_i386;
                    249:     print_insn = print_insn_i386;
                    250: #elif defined(__x86_64__)
                    251:     disasm_info.mach = bfd_mach_x86_64;
                    252:     print_insn = print_insn_i386;
1.1.1.7 ! root      253: #elif defined(_ARCH_PPC)
1.1       root      254:     print_insn = print_insn_ppc;
                    255: #elif defined(__alpha__)
                    256:     print_insn = print_insn_alpha;
                    257: #elif defined(__sparc__)
                    258:     print_insn = print_insn_sparc;
1.1.1.6   root      259: #if defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__)
                    260:     disasm_info.mach = bfd_mach_sparc_v9b;
                    261: #endif
                    262: #elif defined(__arm__)
1.1       root      263:     print_insn = print_insn_arm;
                    264: #elif defined(__MIPSEB__)
                    265:     print_insn = print_insn_big_mips;
                    266: #elif defined(__MIPSEL__)
                    267:     print_insn = print_insn_little_mips;
1.1.1.2   root      268: #elif defined(__m68k__)
                    269:     print_insn = print_insn_m68k;
1.1.1.6   root      270: #elif defined(__s390__)
                    271:     print_insn = print_insn_s390;
1.1.1.7 ! root      272: #elif defined(__hppa__)
        !           273:     print_insn = print_insn_hppa;
1.1       root      274: #else
                    275:     fprintf(out, "0x%lx: Asm output not supported on this arch\n",
                    276:            (long) code);
                    277:     return;
                    278: #endif
1.1.1.7 ! root      279:     for (pc = (unsigned long)code; size > 0; pc += count, size -= count) {
1.1       root      280:        fprintf(out, "0x%08lx:  ", pc);
                    281: #ifdef __arm__
1.1.1.5   root      282:         /* since data is included in the code, it is better to
1.1       root      283:            display code data too */
1.1.1.5   root      284:         fprintf(out, "%08x  ", (int)bfd_getl32((const bfd_byte *)pc));
1.1       root      285: #endif
                    286:        count = print_insn(pc, &disasm_info);
                    287:        fprintf(out, "\n");
                    288:        if (count < 0)
                    289:            break;
                    290:     }
                    291: }
                    292: 
                    293: /* Look up symbol for debugging purpose.  Returns "" if unknown. */
                    294: const char *lookup_symbol(target_ulong orig_addr)
                    295: {
1.1.1.7 ! root      296:     const char *symbol = "";
1.1       root      297:     struct syminfo *s;
1.1.1.6   root      298: 
1.1       root      299:     for (s = syminfos; s; s = s->next) {
1.1.1.7 ! root      300:         symbol = s->lookup_symbol(s, orig_addr);
        !           301:         if (symbol[0] != '\0') {
        !           302:             break;
        !           303:         }
1.1       root      304:     }
1.1.1.7 ! root      305: 
        !           306:     return symbol;
1.1       root      307: }
                    308: 
                    309: #if !defined(CONFIG_USER_ONLY)
                    310: 
                    311: void term_vprintf(const char *fmt, va_list ap);
                    312: void term_printf(const char *fmt, ...);
                    313: 
                    314: static int monitor_disas_is_physical;
1.1.1.2   root      315: static CPUState *monitor_disas_env;
1.1       root      316: 
                    317: static int
1.1.1.7 ! root      318: monitor_read_memory (bfd_vma memaddr, bfd_byte *myaddr, int length,
        !           319:                      struct disassemble_info *info)
1.1       root      320: {
                    321:     if (monitor_disas_is_physical) {
                    322:         cpu_physical_memory_rw(memaddr, myaddr, length, 0);
                    323:     } else {
1.1.1.2   root      324:         cpu_memory_rw_debug(monitor_disas_env, memaddr,myaddr, length, 0);
1.1       root      325:     }
                    326:     return 0;
                    327: }
                    328: 
                    329: static int monitor_fprintf(FILE *stream, const char *fmt, ...)
                    330: {
                    331:     va_list ap;
                    332:     va_start(ap, fmt);
                    333:     term_vprintf(fmt, ap);
                    334:     va_end(ap);
                    335:     return 0;
                    336: }
                    337: 
1.1.1.2   root      338: void monitor_disas(CPUState *env,
                    339:                    target_ulong pc, int nb_insn, int is_physical, int flags)
1.1       root      340: {
                    341:     int count, i;
                    342:     struct disassemble_info disasm_info;
                    343:     int (*print_insn)(bfd_vma pc, disassemble_info *info);
                    344: 
                    345:     INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf);
                    346: 
1.1.1.2   root      347:     monitor_disas_env = env;
1.1       root      348:     monitor_disas_is_physical = is_physical;
                    349:     disasm_info.read_memory_func = monitor_read_memory;
                    350: 
                    351:     disasm_info.buffer_vma = pc;
                    352: 
                    353: #ifdef TARGET_WORDS_BIGENDIAN
                    354:     disasm_info.endian = BFD_ENDIAN_BIG;
                    355: #else
                    356:     disasm_info.endian = BFD_ENDIAN_LITTLE;
                    357: #endif
                    358: #if defined(TARGET_I386)
                    359:     if (flags == 2)
                    360:         disasm_info.mach = bfd_mach_x86_64;
1.1.1.6   root      361:     else if (flags == 1)
1.1       root      362:         disasm_info.mach = bfd_mach_i386_i8086;
                    363:     else
                    364:         disasm_info.mach = bfd_mach_i386_i386;
                    365:     print_insn = print_insn_i386;
                    366: #elif defined(TARGET_ARM)
                    367:     print_insn = print_insn_arm;
1.1.1.6   root      368: #elif defined(TARGET_ALPHA)
                    369:     print_insn = print_insn_alpha;
1.1       root      370: #elif defined(TARGET_SPARC)
                    371:     print_insn = print_insn_sparc;
1.1.1.6   root      372: #ifdef TARGET_SPARC64
                    373:     disasm_info.mach = bfd_mach_sparc_v9b;
                    374: #endif
1.1       root      375: #elif defined(TARGET_PPC)
                    376: #ifdef TARGET_PPC64
                    377:     disasm_info.mach = bfd_mach_ppc64;
                    378: #else
                    379:     disasm_info.mach = bfd_mach_ppc;
                    380: #endif
                    381:     print_insn = print_insn_ppc;
1.1.1.5   root      382: #elif defined(TARGET_M68K)
                    383:     print_insn = print_insn_m68k;
1.1       root      384: #elif defined(TARGET_MIPS)
1.1.1.2   root      385: #ifdef TARGET_WORDS_BIGENDIAN
1.1       root      386:     print_insn = print_insn_big_mips;
                    387: #else
1.1.1.2   root      388:     print_insn = print_insn_little_mips;
                    389: #endif
                    390: #else
1.1       root      391:     term_printf("0x" TARGET_FMT_lx
                    392:                ": Asm output not supported on this arch\n", pc);
                    393:     return;
                    394: #endif
                    395: 
                    396:     for(i = 0; i < nb_insn; i++) {
                    397:        term_printf("0x" TARGET_FMT_lx ":  ", pc);
                    398:        count = print_insn(pc, &disasm_info);
                    399:        term_printf("\n");
                    400:        if (count < 0)
                    401:            break;
                    402:         pc += count;
                    403:     }
                    404: }
                    405: #endif

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