linux-user/strace.c

   1 #include <stdio.h>
   2 #include <errno.h>
   3 #include <sys/ipc.h>
   4 #include <sys/msg.h>
   5 #include <sys/sem.h>
   6 #include <sys/shm.h>
   7 #include <sys/select.h>
   8 #include <sys/types.h>
   9 #include <sys/mount.h>
  10 #include <sys/mman.h>
  11 #include <unistd.h>
  12 #include "qemu.h"
  13
  14 int do_strace=0;
  15
  16 struct syscallname {
  17     int nr;
  18     const char *name;
  19     const char *format;
  20     void (*call)(const struct syscallname *,
  21                  abi_long, abi_long, abi_long,
  22                  abi_long, abi_long, abi_long);
  23     void (*result)(const struct syscallname *, abi_long);
  24 };
  25
  26 #ifdef __GNUC__
  27 /*
  28  * It is possible that target doesn't have syscall that uses
  29  * following flags but we don't want the compiler to warn
  30  * us about them being unused.  Same applies to utility print
  31  * functions.  It is ok to keep them while not used.
  32  */
  33 #define UNUSED __attribute__ ((unused))
  34 #else
  35 #define UNUSED
  36 #endif
  37
  38 /*
  39  * Structure used to translate flag values into strings.  This is
  40  * similar that is in the actual strace tool.
  41  */
  42 struct flags {
  43     abi_long    f_value;  /* flag */
  44     const char  *f_string; /* stringified flag */
  45 };
  46
  47 /* common flags for all architectures */
  48 #define FLAG_GENERIC(name) { name, #name }
  49 /* target specific flags (syscall_defs.h has TARGET_<flag>) */
  50 #define FLAG_TARGET(name)  { TARGET_ ## name, #name }
  51 /* end of flags array */
  52 #define FLAG_END           { 0, NULL }
  53
  54 UNUSED static const char *get_comma(int);
  55 UNUSED static void print_pointer(abi_long, int);
  56 UNUSED static void print_flags(const struct flags *, abi_long, int);
  57 UNUSED static void print_at_dirfd(abi_long, int);
  58 UNUSED static void print_file_mode(abi_long, int);
  59 UNUSED static void print_open_flags(abi_long, int);
  60 UNUSED static void print_syscall_prologue(const struct syscallname *);
  61 UNUSED static void print_syscall_epilogue(const struct syscallname *);
  62 UNUSED static void print_string(abi_long, int);
  63 UNUSED static void print_raw_param(const char *, abi_long, int);
  64 UNUSED static void print_timeval(abi_ulong, int);
  65 UNUSED static void print_number(abi_long, int);
  66
  67 /*
  68  * Utility functions
  69  */
  70 static void
  71 print_ipc_cmd(int cmd)
  72 {
  73 #define output_cmd(val) \
  74 if( cmd == val ) { \
  75     gemu_log(#val); \
  76     return; \
  77 }
  78
  79     cmd &= 0xff;
  80
  81     /* General IPC commands */
  82     output_cmd( IPC_RMID );
  83     output_cmd( IPC_SET );
  84     output_cmd( IPC_STAT );
  85     output_cmd( IPC_INFO );
  86     /* msgctl() commands */
  87     #ifdef __USER_MISC
  88     output_cmd( MSG_STAT );
  89     output_cmd( MSG_INFO );
  90     #endif
  91     /* shmctl() commands */
  92     output_cmd( SHM_LOCK );
  93     output_cmd( SHM_UNLOCK );
  94     output_cmd( SHM_STAT );
  95     output_cmd( SHM_INFO );
  96     /* semctl() commands */
  97     output_cmd( GETPID );
  98     output_cmd( GETVAL );
  99     output_cmd( GETALL );
 100     output_cmd( GETNCNT );
 101     output_cmd( GETZCNT );
 102     output_cmd( SETVAL );
 103     output_cmd( SETALL );
 104     output_cmd( SEM_STAT );
 105     output_cmd( SEM_INFO );
 106     output_cmd( IPC_RMID );
 107     output_cmd( IPC_RMID );
 108     output_cmd( IPC_RMID );
 109     output_cmd( IPC_RMID );
 110     output_cmd( IPC_RMID );
 111     output_cmd( IPC_RMID );
 112     output_cmd( IPC_RMID );
 113     output_cmd( IPC_RMID );
 114     output_cmd( IPC_RMID );
 115
 116     /* Some value we don't recognize */
 117     gemu_log("%d",cmd);
 118 }
 119
 120 #ifdef TARGET_NR__newselect
 121 static void
 122 print_fdset(int n, abi_ulong target_fds_addr)
 123 {
 124     int i;
 125
 126     gemu_log("[");
 127     if( target_fds_addr ) {
 128         abi_long *target_fds;
 129
 130         target_fds = lock_user(VERIFY_READ,
 131                                target_fds_addr,
 132                                sizeof(*target_fds)*(n / TARGET_ABI_BITS + 1),
 133                                1);
 134
 135         if (!target_fds)
 136             return;
 137
 138         for (i=n; i>=0; i--) {
 139             if ((tswapl(target_fds[i / TARGET_ABI_BITS]) >> (i & (TARGET_ABI_BITS - 1))) & 1)
 140                 gemu_log("%d,", i );
 141             }
 142         unlock_user(target_fds, target_fds_addr, 0);
 143     }
 144     gemu_log("]");
 145 }
 146 #endif
 147
 148 /*
 149  * Sysycall specific output functions
 150  */
 151
 152 /* select */
 153 #ifdef TARGET_NR__newselect
 154 static long newselect_arg1 = 0;
 155 static long newselect_arg2 = 0;
 156 static long newselect_arg3 = 0;
 157 static long newselect_arg4 = 0;
 158 static long newselect_arg5 = 0;
 159
 160 static void
 161 print_newselect(const struct syscallname *name,
 162                 abi_long arg1, abi_long arg2, abi_long arg3,
 163                 abi_long arg4, abi_long arg5, abi_long arg6)
 164 {
 165     gemu_log("%s(" TARGET_ABI_FMT_ld ",", name->name, arg1);
 166     print_fdset(arg1, arg2);
 167     gemu_log(",");
 168     print_fdset(arg1, arg3);
 169     gemu_log(",");
 170     print_fdset(arg1, arg4);
 171     gemu_log(",");
 172     print_timeval(arg5, 1);
 173     gemu_log(")");
 174
 175     /* save for use in the return output function below */
 176     newselect_arg1=arg1;
 177     newselect_arg2=arg2;
 178     newselect_arg3=arg3;
 179     newselect_arg4=arg4;
 180     newselect_arg5=arg5;
 181 }
 182 #endif
 183
 184 #ifdef TARGET_NR_semctl
 185 static void
 186 print_semctl(const struct syscallname *name,
 187              abi_long arg1, abi_long arg2, abi_long arg3,
 188              abi_long arg4, abi_long arg5, abi_long arg6)
 189 {
 190     gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ",", name->name, arg1, arg2);
 191     print_ipc_cmd(arg3);
 192     gemu_log(",0x" TARGET_ABI_FMT_lx ")", arg4);
 193 }
 194 #endif
 195
 196 static void
 197 print_execve(const struct syscallname *name,
 198              abi_long arg1, abi_long arg2, abi_long arg3,
 199              abi_long arg4, abi_long arg5, abi_long arg6)
 200 {
 201     abi_ulong arg_ptr_addr;
 202     char *s;
 203
 204     if (!(s = lock_user_string(arg1)))
 205         return;
 206     gemu_log("%s(\"%s\",{", name->name, s);
 207     unlock_user(s, arg1, 0);
 208
 209     for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) {
 210         abi_ulong *arg_ptr, arg_addr;
 211
 212         arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1);
 213         if (!arg_ptr)
 214             return;
 215         arg_addr = tswapl(*arg_ptr);
 216         unlock_user(arg_ptr, arg_ptr_addr, 0);
 217         if (!arg_addr)
 218             break;
 219         if ((s = lock_user_string(arg_addr))) {
 220             gemu_log("\"%s\",", s);
 221             unlock_user(s, arg_addr, 0);
 222         }
 223     }
 224
 225     gemu_log("NULL})");
 226 }
 227
 228 #ifdef TARGET_NR_ipc
 229 static void
 230 print_ipc(const struct syscallname *name,
 231           abi_long arg1, abi_long arg2, abi_long arg3,
 232           abi_long arg4, abi_long arg5, abi_long arg6)
 233 {
 234     switch(arg1) {
 235     case IPCOP_semctl:
 236         gemu_log("semctl(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ",", arg1, arg2);
 237         print_ipc_cmd(arg3);
 238         gemu_log(",0x" TARGET_ABI_FMT_lx ")", arg4);
 239         break;
 240     default:
 241         gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")",
 242                  name->name, arg1, arg2, arg3, arg4);
 243     }
 244 }
 245 #endif
 246
 247 /*
 248  * Variants for the return value output function
 249  */
 250
 251 static void
 252 print_syscall_ret_addr(const struct syscallname *name, abi_long ret)
 253 {
 254 if( ret == -1 ) {
 255         gemu_log(" = -1 errno=%d (%s)\n", errno, target_strerror(errno));
 256     } else {
 257         gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
 258     }
 259 }
 260
 261 #if 0 /* currently unused */
 262 static void
 263 print_syscall_ret_raw(struct syscallname *name, abi_long ret)
 264 {
 265         gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
 266 }
 267 #endif
 268
 269 #ifdef TARGET_NR__newselect
 270 static void
 271 print_syscall_ret_newselect(const struct syscallname *name, abi_long ret)
 272 {
 273     gemu_log(" = 0x" TARGET_ABI_FMT_lx " (", ret);
 274     print_fdset(newselect_arg1,newselect_arg2);
 275     gemu_log(",");
 276     print_fdset(newselect_arg1,newselect_arg3);
 277     gemu_log(",");
 278     print_fdset(newselect_arg1,newselect_arg4);
 279     gemu_log(",");
 280     print_timeval(newselect_arg5, 1);
 281     gemu_log(")\n");
 282 }
 283 #endif
 284
 285 UNUSED static struct flags access_flags[] = {
 286     FLAG_GENERIC(F_OK),
 287     FLAG_GENERIC(R_OK),
 288     FLAG_GENERIC(W_OK),
 289     FLAG_GENERIC(X_OK),
 290     FLAG_END,
 291 };
 292
 293 UNUSED static struct flags at_file_flags[] = {
 294 #ifdef AT_EACCESS
 295     FLAG_GENERIC(AT_EACCESS),
 296 #endif
 297 #ifdef AT_SYMLINK_NOFOLLOW
 298     FLAG_GENERIC(AT_SYMLINK_NOFOLLOW),
 299 #endif
 300     FLAG_END,
 301 };
 302
 303 UNUSED static struct flags unlinkat_flags[] = {
 304 #ifdef AT_REMOVEDIR
 305     FLAG_GENERIC(AT_REMOVEDIR),
 306 #endif
 307     FLAG_END,
 308 };
 309
 310 UNUSED static struct flags mode_flags[] = {
 311     FLAG_GENERIC(S_IFSOCK),
 312     FLAG_GENERIC(S_IFLNK),
 313     FLAG_GENERIC(S_IFREG),
 314     FLAG_GENERIC(S_IFBLK),
 315     FLAG_GENERIC(S_IFDIR),
 316     FLAG_GENERIC(S_IFCHR),
 317     FLAG_GENERIC(S_IFIFO),
 318     FLAG_END,
 319 };
 320
 321 UNUSED static struct flags open_access_flags[] = {
 322     FLAG_TARGET(O_RDONLY),
 323     FLAG_TARGET(O_WRONLY),
 324     FLAG_TARGET(O_RDWR),
 325     FLAG_END,
 326 };
 327
 328 UNUSED static struct flags open_flags[] = {
 329     FLAG_TARGET(O_APPEND),
 330     FLAG_TARGET(O_CREAT),
 331     FLAG_TARGET(O_DIRECTORY),
 332     FLAG_TARGET(O_EXCL),
 333     FLAG_TARGET(O_LARGEFILE),
 334     FLAG_TARGET(O_NOCTTY),
 335     FLAG_TARGET(O_NOFOLLOW),
 336     FLAG_TARGET(O_NONBLOCK),      /* also O_NDELAY */
 337     FLAG_TARGET(O_SYNC),
 338     FLAG_TARGET(O_TRUNC),
 339 #ifdef O_DIRECT
 340     FLAG_TARGET(O_DIRECT),
 341 #endif
 342     FLAG_END,
 343 };
 344
 345 UNUSED static struct flags mount_flags[] = {
 346 #ifdef MS_BIND
 347     FLAG_GENERIC(MS_BIND),
 348 #endif
 349 #ifdef MS_DIRSYNC
 350     FLAG_GENERIC(MS_DIRSYNC),
 351 #endif
 352     FLAG_GENERIC(MS_MANDLOCK),
 353 #ifdef MS_MOVE
 354     FLAG_GENERIC(MS_MOVE),
 355 #endif
 356     FLAG_GENERIC(MS_NOATIME),
 357     FLAG_GENERIC(MS_NODEV),
 358     FLAG_GENERIC(MS_NODIRATIME),
 359     FLAG_GENERIC(MS_NOEXEC),
 360     FLAG_GENERIC(MS_NOSUID),
 361     FLAG_GENERIC(MS_RDONLY),
 362 #ifdef MS_RELATIME
 363     FLAG_GENERIC(MS_RELATIME),
 364 #endif
 365     FLAG_GENERIC(MS_REMOUNT),
 366     FLAG_GENERIC(MS_SYNCHRONOUS),
 367     FLAG_END,
 368 };
 369
 370 UNUSED static struct flags umount2_flags[] = {
 371 #ifdef MNT_FORCE
 372     FLAG_GENERIC(MNT_FORCE),
 373 #endif
 374 #ifdef MNT_DETACH
 375     FLAG_GENERIC(MNT_DETACH),
 376 #endif
 377 #ifdef MNT_EXPIRE
 378     FLAG_GENERIC(MNT_EXPIRE),
 379 #endif
 380     FLAG_END,
 381 };
 382
 383 UNUSED static struct flags mmap_prot_flags[] = {
 384     FLAG_GENERIC(PROT_NONE),
 385     FLAG_GENERIC(PROT_EXEC),
 386     FLAG_GENERIC(PROT_READ),
 387     FLAG_GENERIC(PROT_WRITE),
 388     FLAG_TARGET(PROT_SEM),
 389     FLAG_GENERIC(PROT_GROWSDOWN),
 390     FLAG_GENERIC(PROT_GROWSUP),
 391     FLAG_END,
 392 };
 393
 394 UNUSED static struct flags mmap_flags[] = {
 395     FLAG_TARGET(MAP_SHARED),
 396     FLAG_TARGET(MAP_PRIVATE),
 397     FLAG_TARGET(MAP_ANONYMOUS),
 398     FLAG_TARGET(MAP_DENYWRITE),
 399     FLAG_TARGET(MAP_FIXED),
 400     FLAG_TARGET(MAP_GROWSDOWN),
 401 #ifdef MAP_LOCKED
 402     FLAG_TARGET(MAP_LOCKED),
 403 #endif
 404 #ifdef MAP_NONBLOCK
 405     FLAG_TARGET(MAP_NONBLOCK),
 406 #endif
 407     FLAG_TARGET(MAP_NORESERVE),
 408 #ifdef MAP_POPULATE
 409     FLAG_TARGET(MAP_POPULATE),
 410 #endif
 411     FLAG_END,
 412 };
 413
 414 UNUSED static struct flags fcntl_flags[] = {
 415     FLAG_TARGET(F_DUPFD),
 416     FLAG_TARGET(F_GETFD),
 417     FLAG_TARGET(F_SETFD),
 418     FLAG_TARGET(F_GETFL),
 419     FLAG_TARGET(F_SETFL),
 420     FLAG_TARGET(F_GETLK),
 421     FLAG_TARGET(F_SETLK),
 422     FLAG_TARGET(F_SETLKW),
 423     FLAG_END,
 424 };
 425
 426 /*
 427  * print_xxx utility functions.  These are used to print syscall
 428  * parameters in certain format.  All of these have parameter
 429  * named 'last'.  This parameter is used to add comma to output
 430  * when last == 0.
 431  */
 432
 433 static const char *
 434 get_comma(int last)
 435 {
 436     return ((last) ? "" : ",");
 437 }
 438
 439 static void
 440 print_flags(const struct flags *f, abi_long tflags, int last)
 441 {
 442     const char *sep = "";
 443     int flags;
 444     int n;
 445
 446     flags = (int)tswap32(tflags);
 447
 448     if ((flags == 0) && (f->f_value == 0)) {
 449         gemu_log("%s%s", f->f_string, get_comma(last));
 450         return;
 451     }
 452     for (n = 0; f->f_string != NULL; f++) {
 453         if ((f->f_value != 0) && ((flags & f->f_value) == f->f_value)) {
 454             gemu_log("%s%s", sep, f->f_string);
 455             flags &= ~f->f_value;
 456             sep = "|";
 457             n++;
 458         }
 459     }
 460
 461     if (n > 0) {
 462         /* print rest of the flags as numeric */
 463         if (flags != 0) {
 464             gemu_log("%s%#x%s", sep, flags, get_comma(last));
 465         } else {
 466             gemu_log("%s", get_comma(last));
 467         }
 468     } else {
 469         /* no string version of flags found, print them in hex then */
 470         gemu_log("%#x%s", flags, get_comma(last));
 471     }
 472 }
 473
 474 static void
 475 print_at_dirfd(abi_long tdirfd, int last)
 476 {
 477     int dirfd = tswap32(tdirfd);
 478
 479 #ifdef AT_FDCWD
 480     if (dirfd == AT_FDCWD) {
 481         gemu_log("AT_FDCWD%s", get_comma(last));
 482         return;
 483     }
 484 #endif
 485     gemu_log("%d%s", dirfd, get_comma(last));
 486 }
 487
 488 static void
 489 print_file_mode(abi_long tmode, int last)
 490 {
 491     const char *sep = "";
 492     const struct flags *m;
 493     mode_t mode = (mode_t)tswap32(tmode);
 494
 495     for (m = &mode_flags[0]; m->f_string != NULL; m++) {
 496         if ((m->f_value & mode) == m->f_value) {
 497             gemu_log("%s%s", m->f_string, sep);
 498             sep = "|";
 499             mode &= ~m->f_value;
 500             break;
 501         }
 502     }
 503
 504     mode &= ~S_IFMT;
 505     /* print rest of the mode as octal */
 506     if (mode != 0)
 507         gemu_log("%s%#o", sep, mode);
 508
 509     gemu_log("%s", get_comma(last));
 510 }
 511
 512 static void
 513 print_open_flags(abi_long tflags, int last)
 514 {
 515     int flags = tswap32(tflags);
 516
 517     print_flags(open_access_flags, flags & TARGET_O_ACCMODE, 1);
 518     flags &= ~TARGET_O_ACCMODE;
 519     if (flags == 0) {
 520         gemu_log("%s", get_comma(last));
 521         return;
 522     }
 523     gemu_log("|");
 524     print_flags(open_flags, flags, last);
 525 }
 526
 527 static void
 528 print_syscall_prologue(const struct syscallname *sc)
 529 {
 530     gemu_log("%s(", sc->name);
 531 }
 532
 533 /*ARGSUSED*/
 534 static void
 535 print_syscall_epilogue(const struct syscallname *sc)
 536 {
 537     (void)sc;
 538     gemu_log(")");
 539 }
 540
 541 static void
 542 print_string(abi_long addr, int last)
 543 {
 544     char *s;
 545
 546     if ((s = lock_user_string(addr)) != NULL) {
 547         gemu_log("\"%s\"%s", s, get_comma(last));
 548         unlock_user(s, addr, 0);
 549     } else {
 550         /* can't get string out of it, so print it as pointer */
 551         print_pointer(addr, last);
 552     }
 553 }
 554
 555 /*
 556  * Prints out raw parameter using given format.  Caller needs
 557  * to do byte swapping if needed.
 558  */
 559 static void
 560 print_raw_param(const char *fmt, abi_long param, int last)
 561 {
 562     char format[64];
 563
 564     (void) snprintf(format, sizeof (format), "%s%s", fmt, get_comma(last));
 565     gemu_log(format, param);
 566 }
 567
 568 static void
 569 print_pointer(abi_long p, int last)
 570 {
 571     if (p == 0)
 572         gemu_log("NULL%s", get_comma(last));
 573     else
 574         gemu_log("0x" TARGET_ABI_FMT_lx "%s", p, get_comma(last));
 575 }
 576
 577 /*
 578  * Reads 32-bit (int) number from guest address space from
 579  * address 'addr' and prints it.
 580  */
 581 static void
 582 print_number(abi_long addr, int last)
 583 {
 584     if (addr == 0) {
 585         gemu_log("NULL%s", get_comma(last));
 586     } else {
 587         int num;
 588
 589         get_user_s32(num, addr);
 590         gemu_log("[%d]%s", num, get_comma(last));
 591     }
 592 }
 593
 594 static void
 595 print_timeval(abi_ulong tv_addr, int last)
 596 {
 597     if( tv_addr ) {
 598         struct target_timeval *tv;
 599
 600         tv = lock_user(VERIFY_READ, tv_addr, sizeof(*tv), 1);
 601         if (!tv)
 602             return;
 603         gemu_log("{" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "}%s",
 604             tv->tv_sec, tv->tv_usec, get_comma(last));
 605         unlock_user(tv, tv_addr, 0);
 606     } else
 607         gemu_log("NULL%s", get_comma(last));
 608 }
 609
 610 #undef UNUSED
 611
 612 #ifdef TARGET_NR_accept
 613 static void
 614 print_accept(const struct syscallname *name,
 615     abi_long arg0, abi_long arg1, abi_long arg2,
 616     abi_long arg3, abi_long arg4, abi_long arg5)
 617 {
 618     print_syscall_prologue(name);
 619     print_raw_param("%d", tswap32(arg0), 0);
 620     print_pointer(arg1, 0);
 621     print_number(arg2, 1);
 622     print_syscall_epilogue(name);
 623 }
 624 #endif
 625
 626 #ifdef TARGET_NR_access
 627 static void
 628 print_access(const struct syscallname *name,
 629     abi_long arg0, abi_long arg1, abi_long arg2,
 630     abi_long arg3, abi_long arg4, abi_long arg5)
 631 {
 632     print_syscall_prologue(name);
 633     print_string(arg0, 0);
 634     print_flags(access_flags, arg1, 1);
 635     print_syscall_epilogue(name);
 636 }
 637 #endif
 638
 639 #ifdef TARGET_NR_brk
 640 static void
 641 print_brk(const struct syscallname *name,
 642     abi_long arg0, abi_long arg1, abi_long arg2,
 643     abi_long arg3, abi_long arg4, abi_long arg5)
 644 {
 645     print_syscall_prologue(name);
 646     print_pointer(arg0, 1);
 647     print_syscall_epilogue(name);
 648 }
 649 #endif
 650
 651 #ifdef TARGET_NR_chdir
 652 static void
 653 print_chdir(const struct syscallname *name,
 654     abi_long arg0, abi_long arg1, abi_long arg2,
 655     abi_long arg3, abi_long arg4, abi_long arg5)
 656 {
 657     print_syscall_prologue(name);
 658     print_string(arg0, 1);
 659     print_syscall_epilogue(name);
 660 }
 661 #endif
 662
 663 #ifdef TARGET_NR_chmod
 664 static void
 665 print_chmod(const struct syscallname *name,
 666     abi_long arg0, abi_long arg1, abi_long arg2,
 667     abi_long arg3, abi_long arg4, abi_long arg5)
 668 {
 669     print_syscall_prologue(name);
 670     print_string(arg0, 0);
 671     print_file_mode(arg1, 1);
 672     print_syscall_epilogue(name);
 673 }
 674 #endif
 675
 676 #ifdef TARGET_NR_creat
 677 static void
 678 print_creat(const struct syscallname *name,
 679     abi_long arg0, abi_long arg1, abi_long arg2,
 680     abi_long arg3, abi_long arg4, abi_long arg5)
 681 {
 682     print_syscall_prologue(name);
 683     print_string(arg0, 0);
 684     print_file_mode(arg1, 1);
 685     print_syscall_epilogue(name);
 686 }
 687 #endif
 688
 689 #ifdef TARGET_NR_execv
 690 static void
 691 print_execv(const struct syscallname *name,
 692     abi_long arg0, abi_long arg1, abi_long arg2,
 693     abi_long arg3, abi_long arg4, abi_long arg5)
 694 {
 695     print_syscall_prologue(name);
 696     print_string(arg0, 0);
 697     print_raw_param("0x" TARGET_ABI_FMT_lx, tswapl(arg1), 1);
 698     print_syscall_epilogue(name);
 699 }
 700 #endif
 701
 702 #ifdef TARGET_NR_faccessat
 703 static void
 704 print_faccessat(const struct syscallname *name,
 705     abi_long arg0, abi_long arg1, abi_long arg2,
 706     abi_long arg3, abi_long arg4, abi_long arg5)
 707 {
 708     print_syscall_prologue(name);
 709     print_at_dirfd(arg0, 0);
 710     print_string(arg1, 0);
 711     print_flags(access_flags, arg2, 0);
 712     print_flags(at_file_flags, arg3, 1);
 713     print_syscall_epilogue(name);
 714 }
 715 #endif
 716
 717 #ifdef TARGET_NR_fchmodat
 718 static void
 719 print_fchmodat(const struct syscallname *name,
 720     abi_long arg0, abi_long arg1, abi_long arg2,
 721     abi_long arg3, abi_long arg4, abi_long arg5)
 722 {
 723     print_syscall_prologue(name);
 724     print_at_dirfd(arg0, 0);
 725     print_string(arg1, 0);
 726     print_file_mode(arg2, 0);
 727     print_flags(at_file_flags, arg3, 1);
 728     print_syscall_epilogue(name);
 729 }
 730 #endif
 731
 732 #ifdef TARGET_NR_fchownat
 733 static void
 734 print_fchownat(const struct syscallname *name,
 735     abi_long arg0, abi_long arg1, abi_long arg2,
 736     abi_long arg3, abi_long arg4, abi_long arg5)
 737 {
 738     print_syscall_prologue(name);
 739     print_at_dirfd(arg0, 0);
 740     print_string(arg1, 0);
 741 #ifdef USE_UID16
 742     print_raw_param("%d", tswap16(arg2), 0);
 743     print_raw_param("%d", tswap16(arg3), 0);
 744 #else
 745     print_raw_param("%d", tswap32(arg2), 0);
 746     print_raw_param("%d", tswap32(arg3), 0);
 747 #endif
 748     print_flags(at_file_flags, arg4, 1);
 749     print_syscall_epilogue(name);
 750 }
 751 #endif
 752
 753 #if defined(TARGET_NR_fcntl) || defined(TARGET_NR_fcntl64)
 754 static void
 755 print_fcntl(const struct syscallname *name,
 756     abi_long arg0, abi_long arg1, abi_long arg2,
 757     abi_long arg3, abi_long arg4, abi_long arg5)
 758 {
 759     print_syscall_prologue(name);
 760     print_raw_param("%d", tswap32(arg0), 0);
 761     print_flags(fcntl_flags, arg1, 0);
 762     /*
 763      * TODO: check flags and print following argument only
 764      *       when needed.
 765      */
 766     print_pointer(arg2, 1);
 767     print_syscall_epilogue(name);
 768 }
 769 #define print_fcntl64   print_fcntl
 770 #endif
 771
 772
 773 #ifdef TARGET_NR_futimesat
 774 static void
 775 print_futimesat(const struct syscallname *name,
 776     abi_long arg0, abi_long arg1, abi_long arg2,
 777     abi_long arg3, abi_long arg4, abi_long arg5)
 778 {
 779     print_syscall_prologue(name);
 780     print_at_dirfd(arg0, 0);
 781     print_string(arg1, 0);
 782     print_timeval(arg2, 0);
 783     print_timeval(arg2 + sizeof (struct target_timeval), 1);
 784     print_syscall_epilogue(name);
 785 }
 786 #endif
 787
 788 #ifdef TARGET_NR_link
 789 static void
 790 print_link(const struct syscallname *name,
 791     abi_long arg0, abi_long arg1, abi_long arg2,
 792     abi_long arg3, abi_long arg4, abi_long arg5)
 793 {
 794     print_syscall_prologue(name);
 795     print_string(arg0, 0);
 796     print_string(arg1, 1);
 797     print_syscall_epilogue(name);
 798 }
 799 #endif
 800
 801 #ifdef TARGET_NR_linkat
 802 static void
 803 print_linkat(const struct syscallname *name,
 804     abi_long arg0, abi_long arg1, abi_long arg2,
 805     abi_long arg3, abi_long arg4, abi_long arg5)
 806 {
 807     print_syscall_prologue(name);
 808     print_at_dirfd(arg0, 0);
 809     print_string(arg1, 0);
 810     print_at_dirfd(arg2, 0);
 811     print_string(arg3, 0);
 812     print_flags(at_file_flags, arg4, 1);
 813     print_syscall_epilogue(name);
 814 }
 815 #endif
 816
 817 #if defined(TARGET_NR_stat) || defined(TARGET_NR_stat64) || \
 818     defined(TARGET_NR_lstat) || defined(TARGET_NR_lstat64)
 819 static void
 820 print_stat(const struct syscallname *name,
 821     abi_long arg0, abi_long arg1, abi_long arg2,
 822     abi_long arg3, abi_long arg4, abi_long arg5)
 823 {
 824     print_syscall_prologue(name);
 825     print_string(arg0, 0);
 826     print_pointer(arg1, 1);
 827     print_syscall_epilogue(name);
 828 }
 829 #define print_lstat     print_stat
 830 #define print_stat64    print_stat
 831 #define print_lstat64   print_stat
 832 #endif
 833
 834 #if defined(TARGET_NR_fstat) || defined(TARGET_NR_fstat64)
 835 static void
 836 print_fstat(const struct syscallname *name,
 837     abi_long arg0, abi_long arg1, abi_long arg2,
 838     abi_long arg3, abi_long arg4, abi_long arg5)
 839 {
 840     print_syscall_prologue(name);
 841     print_raw_param("%d", tswap32(arg0), 0);
 842     print_pointer(arg1, 1);
 843     print_syscall_epilogue(name);
 844 }
 845 #define print_fstat64     print_fstat
 846 #endif
 847
 848 #ifdef TARGET_NR_mkdir
 849 static void
 850 print_mkdir(const struct syscallname *name,
 851     abi_long arg0, abi_long arg1, abi_long arg2,
 852     abi_long arg3, abi_long arg4, abi_long arg5)
 853 {
 854     print_syscall_prologue(name);
 855     print_string(arg0, 0);
 856     print_file_mode(arg1, 1);
 857     print_syscall_epilogue(name);
 858 }
 859 #endif
 860
 861 #ifdef TARGET_NR_mkdirat
 862 static void
 863 print_mkdirat(const struct syscallname *name,
 864     abi_long arg0, abi_long arg1, abi_long arg2,
 865     abi_long arg3, abi_long arg4, abi_long arg5)
 866 {
 867     print_syscall_prologue(name);
 868     print_at_dirfd(arg0, 0);
 869     print_string(arg1, 0);
 870     print_file_mode(arg2, 1);
 871     print_syscall_epilogue(name);
 872 }
 873 #endif
 874
 875 #ifdef TARGET_NR_mknod
 876 static void
 877 print_mknod(const struct syscallname *name,
 878     abi_long arg0, abi_long arg1, abi_long arg2,
 879     abi_long arg3, abi_long arg4, abi_long arg5)
 880 {
 881     int hasdev = (tswapl(arg1) & (S_IFCHR|S_IFBLK));
 882
 883     print_syscall_prologue(name);
 884     print_string(arg0, 0);
 885     print_file_mode(arg1, (hasdev == 0));
 886     if (hasdev) {
 887         print_raw_param("makedev(%d", major(tswapl(arg2)), 0);
 888         print_raw_param("%d)", minor(tswapl(arg2)), 1);
 889     }
 890     print_syscall_epilogue(name);
 891 }
 892 #endif
 893
 894 #ifdef TARGET_NR_mknodat
 895 static void
 896 print_mknodat(const struct syscallname *name,
 897     abi_long arg0, abi_long arg1, abi_long arg2,
 898     abi_long arg3, abi_long arg4, abi_long arg5)
 899 {
 900     int hasdev = (tswapl(arg2) & (S_IFCHR|S_IFBLK));
 901
 902     print_syscall_prologue(name);
 903     print_at_dirfd(arg0, 0);
 904     print_string(arg1, 0);
 905     print_file_mode(arg2, (hasdev == 0));
 906     if (hasdev) {
 907         print_raw_param("makedev(%d", major(tswapl(arg3)), 0);
 908         print_raw_param("%d)", minor(tswapl(arg3)), 1);
 909     }
 910     print_syscall_epilogue(name);
 911 }
 912 #endif
 913
 914 #ifdef TARGET_NR_mq_open
 915 static void
 916 print_mq_open(const struct syscallname *name,
 917     abi_long arg0, abi_long arg1, abi_long arg2,
 918     abi_long arg3, abi_long arg4, abi_long arg5)
 919 {
 920     int is_creat = (tswapl(arg1) & TARGET_O_CREAT);
 921
 922     print_syscall_prologue(name);
 923     print_string(arg0, 0);
 924     print_open_flags(arg1, (is_creat == 0));
 925     if (is_creat) {
 926         print_file_mode(arg2, 0);
 927         print_pointer(arg3, 1);
 928     }
 929     print_syscall_epilogue(name);
 930 }
 931 #endif
 932
 933 #ifdef TARGET_NR_open
 934 static void
 935 print_open(const struct syscallname *name,
 936     abi_long arg0, abi_long arg1, abi_long arg2,
 937     abi_long arg3, abi_long arg4, abi_long arg5)
 938 {
 939     int is_creat = (tswap32(arg1) & TARGET_O_CREAT);
 940
 941     print_syscall_prologue(name);
 942     print_string(arg0, 0);
 943     print_open_flags(arg1, (is_creat == 0));
 944     if (is_creat)
 945         print_file_mode(arg2, 1);
 946     print_syscall_epilogue(name);
 947 }
 948 #endif
 949
 950 #ifdef TARGET_NR_openat
 951 static void
 952 print_openat(const struct syscallname *name,
 953     abi_long arg0, abi_long arg1, abi_long arg2,
 954     abi_long arg3, abi_long arg4, abi_long arg5)
 955 {
 956     int is_creat = (tswap32(arg2) & TARGET_O_CREAT);
 957
 958     print_syscall_prologue(name);
 959     print_at_dirfd(arg0, 0);
 960     print_string(arg1, 0);
 961     print_open_flags(arg2, (is_creat == 0));
 962     if (is_creat)
 963         print_file_mode(arg3, 1);
 964     print_syscall_epilogue(name);
 965 }
 966 #endif
 967
 968 #ifdef TARGET_NR_mq_unlink
 969 static void
 970 print_mq_unlink(const struct syscallname *name,
 971     abi_long arg0, abi_long arg1, abi_long arg2,
 972     abi_long arg3, abi_long arg4, abi_long arg5)
 973 {
 974     print_syscall_prologue(name);
 975     print_string(arg0, 1);
 976     print_syscall_epilogue(name);
 977 }
 978 #endif
 979
 980 #if defined(TARGET_NR_fstatat64) || defined(TARGET_NR_newfstatat)
 981 static void
 982 print_fstatat64(const struct syscallname *name,
 983     abi_long arg0, abi_long arg1, abi_long arg2,
 984     abi_long arg3, abi_long arg4, abi_long arg5)
 985 {
 986     print_syscall_prologue(name);
 987     print_at_dirfd(arg0, 0);
 988     print_string(arg1, 0);
 989     print_pointer(arg2, 0);
 990     print_flags(at_file_flags, arg3, 1);
 991     print_syscall_epilogue(name);
 992 }
 993 #define print_newfstatat    print_fstatat64
 994 #endif
 995
 996 #ifdef TARGET_NR_readlink
 997 static void
 998 print_readlink(const struct syscallname *name,
 999     abi_long arg0, abi_long arg1, abi_long arg2,
1000     abi_long arg3, abi_long arg4, abi_long arg5)
1001 {
1002     print_syscall_prologue(name);
1003     print_string(arg0, 0);
1004     print_pointer(arg1, 0);
1005     print_raw_param("%u", tswapl(arg2), 1);
1006     print_syscall_epilogue(name);
1007 }
1008 #endif
1009
1010 #ifdef TARGET_NR_readlinkat
1011 static void
1012 print_readlinkat(const struct syscallname *name,
1013     abi_long arg0, abi_long arg1, abi_long arg2,
1014     abi_long arg3, abi_long arg4, abi_long arg5)
1015 {
1016     print_syscall_prologue(name);
1017     print_at_dirfd(arg0, 0);
1018     print_string(arg1, 0);
1019     print_pointer(arg2, 0);
1020     print_raw_param("%u", tswapl(arg3), 1);
1021     print_syscall_epilogue(name);
1022 }
1023 #endif
1024
1025 #ifdef TARGET_NR_rename
1026 static void
1027 print_rename(const struct syscallname *name,
1028     abi_long arg0, abi_long arg1, abi_long arg2,
1029     abi_long arg3, abi_long arg4, abi_long arg5)
1030 {
1031     print_syscall_prologue(name);
1032     print_string(arg0, 0);
1033     print_string(arg1, 1);
1034     print_syscall_epilogue(name);
1035 }
1036 #endif
1037
1038 #ifdef TARGET_NR_renameat
1039 static void
1040 print_renameat(const struct syscallname *name,
1041     abi_long arg0, abi_long arg1, abi_long arg2,
1042     abi_long arg3, abi_long arg4, abi_long arg5)
1043 {
1044     print_syscall_prologue(name);
1045     print_at_dirfd(arg0, 0);
1046     print_string(arg1, 0);
1047     print_at_dirfd(arg2, 0);
1048     print_string(arg3, 1);
1049     print_syscall_epilogue(name);
1050 }
1051 #endif
1052
1053 #ifdef TARGET_NR_statfs
1054 static void
1055 print_statfs(const struct syscallname *name,
1056     abi_long arg0, abi_long arg1, abi_long arg2,
1057     abi_long arg3, abi_long arg4, abi_long arg5)
1058 {
1059     print_syscall_prologue(name);
1060     print_string(arg0, 0);
1061     print_pointer(arg1, 1);
1062     print_syscall_epilogue(name);
1063 }
1064 #define print_statfs64  print_statfs
1065 #endif
1066
1067 #ifdef TARGET_NR_symlink
1068 static void
1069 print_symlink(const struct syscallname *name,
1070     abi_long arg0, abi_long arg1, abi_long arg2,
1071     abi_long arg3, abi_long arg4, abi_long arg5)
1072 {
1073     print_syscall_prologue(name);
1074     print_string(arg0, 0);
1075     print_string(arg1, 1);
1076     print_syscall_epilogue(name);
1077 }
1078 #endif
1079
1080 #ifdef TARGET_NR_symlinkat
1081 static void
1082 print_symlinkat(const struct syscallname *name,
1083     abi_long arg0, abi_long arg1, abi_long arg2,
1084     abi_long arg3, abi_long arg4, abi_long arg5)
1085 {
1086     print_syscall_prologue(name);
1087     print_string(arg0, 0);
1088     print_at_dirfd(arg1, 0);
1089     print_string(arg2, 1);
1090     print_syscall_epilogue(name);
1091 }
1092 #endif
1093
1094 #ifdef TARGET_NR_mount
1095 static void
1096 print_mount(const struct syscallname *name,
1097     abi_long arg0, abi_long arg1, abi_long arg2,
1098     abi_long arg3, abi_long arg4, abi_long arg5)
1099 {
1100     print_syscall_prologue(name);
1101     print_string(arg0, 0);
1102     print_string(arg1, 0);
1103     print_string(arg2, 0);
1104     print_flags(mount_flags, arg3, 0);
1105     print_pointer(arg4, 1);
1106     print_syscall_epilogue(name);
1107 }
1108 #endif
1109
1110 #ifdef TARGET_NR_umount
1111 static void
1112 print_umount(const struct syscallname *name,
1113     abi_long arg0, abi_long arg1, abi_long arg2,
1114     abi_long arg3, abi_long arg4, abi_long arg5)
1115 {
1116     print_syscall_prologue(name);
1117     print_string(arg0, 1);
1118     print_syscall_epilogue(name);
1119 }
1120 #endif
1121
1122 #ifdef TARGET_NR_umount2
1123 static void
1124 print_umount2(const struct syscallname *name,
1125     abi_long arg0, abi_long arg1, abi_long arg2,
1126     abi_long arg3, abi_long arg4, abi_long arg5)
1127 {
1128     print_syscall_prologue(name);
1129     print_string(arg0, 0);
1130     print_flags(umount2_flags, arg1, 1);
1131     print_syscall_epilogue(name);
1132 }
1133 #endif
1134
1135 #ifdef TARGET_NR_unlink
1136 static void
1137 print_unlink(const struct syscallname *name,
1138     abi_long arg0, abi_long arg1, abi_long arg2,
1139     abi_long arg3, abi_long arg4, abi_long arg5)
1140 {
1141     print_syscall_prologue(name);
1142     print_string(arg0, 1);
1143     print_syscall_epilogue(name);
1144 }
1145 #endif
1146
1147 #ifdef TARGET_NR_unlinkat
1148 static void
1149 print_unlinkat(const struct syscallname *name,
1150     abi_long arg0, abi_long arg1, abi_long arg2,
1151     abi_long arg3, abi_long arg4, abi_long arg5)
1152 {
1153     print_syscall_prologue(name);
1154     print_at_dirfd(arg0, 0);
1155     print_string(arg1, 0);
1156     print_flags(unlinkat_flags, arg2, 1);
1157     print_syscall_epilogue(name);
1158 }
1159 #endif
1160
1161 #ifdef TARGET_NR_utime
1162 static void
1163 print_utime(const struct syscallname *name,
1164     abi_long arg0, abi_long arg1, abi_long arg2,
1165     abi_long arg3, abi_long arg4, abi_long arg5)
1166 {
1167     print_syscall_prologue(name);
1168     print_string(arg0, 0);
1169     print_pointer(arg1, 1);
1170     print_syscall_epilogue(name);
1171 }
1172 #endif
1173
1174 #ifdef TARGET_NR_utimes
1175 static void
1176 print_utimes(const struct syscallname *name,
1177     abi_long arg0, abi_long arg1, abi_long arg2,
1178     abi_long arg3, abi_long arg4, abi_long arg5)
1179 {
1180     print_syscall_prologue(name);
1181     print_string(arg0, 0);
1182     print_pointer(arg1, 1);
1183     print_syscall_epilogue(name);
1184 }
1185 #endif
1186
1187 #ifdef TARGET_NR_utimensat
1188 static void
1189 print_utimensat(const struct syscallname *name,
1190     abi_long arg0, abi_long arg1, abi_long arg2,
1191     abi_long arg3, abi_long arg4, abi_long arg5)
1192 {
1193     print_syscall_prologue(name);
1194     print_at_dirfd(arg0, 0);
1195     print_string(arg1, 0);
1196     print_pointer(arg2, 0);
1197     print_flags(at_file_flags, arg3, 1);
1198     print_syscall_epilogue(name);
1199 }
1200 #endif
1201
1202 #ifdef TARGET_NR_mmap
1203 static void
1204 print_mmap(const struct syscallname *name,
1205     abi_long arg0, abi_long arg1, abi_long arg2,
1206     abi_long arg3, abi_long arg4, abi_long arg5)
1207 {
1208     print_syscall_prologue(name);
1209     print_pointer(arg0, 0);
1210     print_raw_param("%d", tswapl(arg1), 0);
1211     print_flags(mmap_prot_flags, arg2, 0);
1212     print_flags(mmap_flags, arg3, 0);
1213     print_raw_param("%d", tswapl(arg4), 0);
1214     print_raw_param("%#x", tswapl(arg5), 1);
1215     print_syscall_epilogue(name);
1216 }
1217 #define print_mmap2     print_mmap
1218 #endif
1219
1220 #ifdef TARGET_NR_mprotect
1221 static void
1222 print_mprotect(const struct syscallname *name,
1223     abi_long arg0, abi_long arg1, abi_long arg2,
1224     abi_long arg3, abi_long arg4, abi_long arg5)
1225 {
1226     print_syscall_prologue(name);
1227     print_pointer(arg0, 0);
1228     print_raw_param("%d", tswapl(arg1), 0);
1229     print_flags(mmap_prot_flags, arg2, 1);
1230     print_syscall_epilogue(name);
1231 }
1232 #endif
1233
1234 #ifdef TARGET_NR_munmap
1235 static void
1236 print_munmap(const struct syscallname *name,
1237     abi_long arg0, abi_long arg1, abi_long arg2,
1238     abi_long arg3, abi_long arg4, abi_long arg5)
1239 {
1240     print_syscall_prologue(name);
1241     print_pointer(arg0, 0);
1242     print_raw_param("%d", tswapl(arg1), 1);
1243     print_syscall_epilogue(name);
1244 }
1245 #endif
1246
1247 #ifdef TARGET_NR_futex
1248 static void print_futex_op(abi_long tflag, int last)
1249 {
1250 #define print_op(val) \
1251 if( cmd == val ) { \
1252     gemu_log(#val); \
1253     return; \
1254 }
1255
1256     int cmd = (int)tswap32(tflag);
1257 #ifdef FUTEX_PRIVATE_FLAG
1258     if (cmd & FUTEX_PRIVATE_FLAG) {
1259         gemu_log("FUTEX_PRIVATE_FLAG|");
1260         cmd &= ~FUTEX_PRIVATE_FLAG;
1261     }
1262 #endif
1263     print_op(FUTEX_WAIT)
1264     print_op(FUTEX_WAKE)
1265     print_op(FUTEX_FD)
1266     print_op(FUTEX_REQUEUE)
1267     print_op(FUTEX_CMP_REQUEUE)
1268     print_op(FUTEX_WAKE_OP)
1269     print_op(FUTEX_LOCK_PI)
1270     print_op(FUTEX_UNLOCK_PI)
1271     print_op(FUTEX_TRYLOCK_PI)
1272 #ifdef FUTEX_WAIT_BITSET
1273     print_op(FUTEX_WAIT_BITSET)
1274 #endif
1275 #ifdef FUTEX_WAKE_BITSET
1276     print_op(FUTEX_WAKE_BITSET)
1277 #endif
1278     /* unknown values */
1279     gemu_log("%d",cmd);
1280 }
1281
1282 static void
1283 print_futex(const struct syscallname *name,
1284     abi_long arg0, abi_long arg1, abi_long arg2,
1285     abi_long arg3, abi_long arg4, abi_long arg5)
1286 {
1287     print_syscall_prologue(name);
1288     print_pointer(arg0, 0);
1289     print_futex_op(arg1, 0);
1290     print_raw_param(",%d", tswapl(arg2), 0);
1291     print_pointer(arg3, 0); /* struct timespec */
1292     print_pointer(arg4, 0);
1293     print_raw_param("%d", tswapl(arg4), 1);
1294     print_syscall_epilogue(name);
1295 }
1296 #endif
1297
1298 /*
1299  * An array of all of the syscalls we know about
1300  */
1301
1302 static const struct syscallname scnames[] = {
1303 #include "strace.list"
1304 };
1305
1306 static int nsyscalls = ARRAY_SIZE(scnames);
1307
1308 /*
1309  * The public interface to this module.
1310  */
1311 void
1312 print_syscall(int num,
1313               abi_long arg1, abi_long arg2, abi_long arg3,
1314               abi_long arg4, abi_long arg5, abi_long arg6)
1315 {
1316     int i;
1317     const char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")";
1318
1319     gemu_log("%d ", getpid() );
1320
1321     for(i=0;i<nsyscalls;i++)
1322         if( scnames[i].nr == num ) {
1323             if( scnames[i].call != NULL ) {
1324                 scnames[i].call(&scnames[i],arg1,arg2,arg3,arg4,arg5,arg6);
1325             } else {
1326                 /* XXX: this format system is broken because it uses
1327                    host types and host pointers for strings */
1328                 if( scnames[i].format != NULL )
1329                     format = scnames[i].format;
1330                 gemu_log(format,scnames[i].name, arg1,arg2,arg3,arg4,arg5,arg6);
1331             }
1332             return;
1333         }
1334     gemu_log("Unknown syscall %d\n", num);
1335 }
1336
1337
1338 void
1339 print_syscall_ret(int num, abi_long ret)
1340 {
1341     int i;
1342
1343     for(i=0;i<nsyscalls;i++)
1344         if( scnames[i].nr == num ) {
1345             if( scnames[i].result != NULL ) {
1346                 scnames[i].result(&scnames[i],ret);
1347             } else {
1348                 if( ret < 0 ) {
1349                     gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret, target_strerror(-ret));
1350                 } else {
1351                     gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret);
1352                 }
1353             }
1354             break;
1355         }
1356 }