git.maemo.org Git - qemu/blob - linux-user/syscall.c

   1 /*
   2  *  Linux syscalls
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <stdarg.h>
  23 #include <string.h>
  24 #include <elf.h>
  25 #include <endian.h>
  26 #include <errno.h>
  27 #include <unistd.h>
  28 #include <fcntl.h>
  29 #include <time.h>
  30 #include <sys/types.h>
  31 #include <sys/wait.h>
  32 #include <sys/time.h>
  33 #include <sys/stat.h>
  34 #include <sys/mount.h>
  35 #include <sys/resource.h>
  36 #include <sys/mman.h>
  37 #include <sys/swap.h>
  38 #include <signal.h>
  39 #include <sched.h>
  40 #include <sys/socket.h>
  41 #include <sys/uio.h>
  42 #include <sys/poll.h>
  43 #include <sys/times.h>
  44 //#include <sys/user.h>
  45 #include <netinet/tcp.h>
  46
  47 #define termios host_termios
  48 #define winsize host_winsize
  49 #define termio host_termio
  50 #define sgttyb host_sgttyb /* same as target */
  51 #define tchars host_tchars /* same as target */
  52 #define ltchars host_ltchars /* same as target */
  53
  54 #include <linux/termios.h>
  55 #include <linux/unistd.h>
  56 #include <linux/utsname.h>
  57 #include <linux/cdrom.h>
  58 #include <linux/hdreg.h>
  59 #include <linux/soundcard.h>
  60 #include <linux/dirent.h>
  61
  62 #include "qemu.h"
  63
  64 //#define DEBUG
  65
  66 #ifndef PAGE_SIZE
  67 #define PAGE_SIZE 4096
  68 #define PAGE_MASK ~(PAGE_SIZE - 1)
  69 #endif
  70
  71 //#include <linux/msdos_fs.h>
  72 #define VFAT_IOCTL_READDIR_BOTH         _IOR('r', 1, struct dirent [2])
  73 #define VFAT_IOCTL_READDIR_SHORT        _IOR('r', 2, struct dirent [2])
  74
  75 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
  76 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
  77 long do_sigreturn(CPUX86State *env);
  78 long do_rt_sigreturn(CPUX86State *env);
  79
  80 #define __NR_sys_uname __NR_uname
  81 #define __NR_sys_getcwd1 __NR_getcwd
  82 #define __NR_sys_statfs __NR_statfs
  83 #define __NR_sys_fstatfs __NR_fstatfs
  84 #define __NR_sys_getdents __NR_getdents
  85 #define __NR_sys_getdents64 __NR_getdents64
  86 #define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
  87
  88 #ifdef __NR_gettid
  89 _syscall0(int, gettid)
  90 #else
  91 static int gettid(void) {
  92     return -ENOSYS;
  93 }
  94 #endif
  95 _syscall1(int,sys_uname,struct new_utsname *,buf)
  96 _syscall2(int,sys_getcwd1,char *,buf,size_t,size)
  97 _syscall3(int, sys_getdents, uint, fd, struct dirent *, dirp, uint, count);
  98 _syscall3(int, sys_getdents64, uint, fd, struct dirent64 *, dirp, uint, count);
  99 _syscall5(int, _llseek,  uint,  fd, ulong, hi, ulong, lo,
 100           loff_t *, res, uint, wh);
 101 _syscall2(int,sys_statfs,const char *,path,struct kernel_statfs *,buf)
 102 _syscall2(int,sys_fstatfs,int,fd,struct kernel_statfs *,buf)
 103 _syscall3(int,sys_rt_sigqueueinfo,int,pid,int,sig,siginfo_t *,uinfo)
 104
 105 extern int personality(int);
 106 extern int flock(int, int);
 107 extern int setfsuid(int);
 108 extern int setfsgid(int);
 109 extern int setresuid(uid_t, uid_t, uid_t);
 110 extern int getresuid(uid_t *, uid_t *, uid_t *);
 111 extern int setresgid(gid_t, gid_t, gid_t);
 112 extern int getresgid(gid_t *, gid_t *, gid_t *);
 113
 114 static inline long get_errno(long ret)
 115 {
 116     if (ret == -1)
 117         return -errno;
 118     else
 119         return ret;
 120 }
 121
 122 static inline int is_error(long ret)
 123 {
 124     return (unsigned long)ret >= (unsigned long)(-4096);
 125 }
 126
 127 static char *target_brk;
 128 static char *target_original_brk;
 129
 130 void target_set_brk(char *new_brk)
 131 {
 132     target_brk = new_brk;
 133     target_original_brk = new_brk;
 134 }
 135
 136 static long do_brk(char *new_brk)
 137 {
 138     char *brk_page;
 139     long mapped_addr;
 140     int new_alloc_size;
 141
 142     if (!new_brk)
 143         return (long)target_brk;
 144     if (new_brk < target_original_brk)
 145         return -ENOMEM;
 146
 147     brk_page = (char *)(((unsigned long)target_brk + PAGE_SIZE - 1) & PAGE_MASK);
 148
 149     /* If the new brk is less than this, set it and we're done... */
 150     if (new_brk < brk_page) {
 151         target_brk = new_brk;
 152         return (long)target_brk;
 153     }
 154
 155     /* We need to allocate more memory after the brk... */
 156     new_alloc_size = ((new_brk - brk_page + 1)+(PAGE_SIZE-1)) & PAGE_MASK;
 157     mapped_addr = get_errno((long)mmap((caddr_t)brk_page, new_alloc_size,
 158                                        PROT_READ|PROT_WRITE,
 159                                        MAP_ANON|MAP_FIXED|MAP_PRIVATE, 0, 0));
 160
 161     if (is_error(mapped_addr)) {
 162         return mapped_addr;
 163     } else {
 164         target_brk = new_brk;
 165         return (long)target_brk;
 166     }
 167 }
 168
 169 static inline fd_set *target_to_host_fds(fd_set *fds,
 170                                          target_long *target_fds, int n)
 171 {
 172 #if !defined(BSWAP_NEEDED) && !defined(WORDS_BIGENDIAN)
 173     return (fd_set *)target_fds;
 174 #else
 175     int i, b;
 176     if (target_fds) {
 177         FD_ZERO(fds);
 178         for(i = 0;i < n; i++) {
 179             b = (tswapl(target_fds[i / TARGET_LONG_BITS]) >>
 180                  (i & (TARGET_LONG_BITS - 1))) & 1;
 181             if (b)
 182                 FD_SET(i, fds);
 183         }
 184         return fds;
 185     } else {
 186         return NULL;
 187     }
 188 #endif
 189 }
 190
 191 static inline void host_to_target_fds(target_long *target_fds,
 192                                       fd_set *fds, int n)
 193 {
 194 #if !defined(BSWAP_NEEDED) && !defined(WORDS_BIGENDIAN)
 195     /* nothing to do */
 196 #else
 197     int i, nw, j, k;
 198     target_long v;
 199
 200     if (target_fds) {
 201         nw = n / TARGET_LONG_BITS;
 202         k = 0;
 203         for(i = 0;i < nw; i++) {
 204             v = 0;
 205             for(j = 0; j < TARGET_LONG_BITS; j++) {
 206                 v |= ((FD_ISSET(k, fds) != 0) << j);
 207                 k++;
 208             }
 209             target_fds[i] = tswapl(v);
 210         }
 211     }
 212 #endif
 213 }
 214
 215 static inline void target_to_host_timeval(struct timeval *tv,
 216                                           const struct target_timeval *target_tv)
 217 {
 218     tv->tv_sec = tswapl(target_tv->tv_sec);
 219     tv->tv_usec = tswapl(target_tv->tv_usec);
 220 }
 221
 222 static inline void host_to_target_timeval(struct target_timeval *target_tv,
 223                                           const struct timeval *tv)
 224 {
 225     target_tv->tv_sec = tswapl(tv->tv_sec);
 226     target_tv->tv_usec = tswapl(tv->tv_usec);
 227 }
 228
 229
 230 static long do_select(long n,
 231                       target_long *target_rfds, target_long *target_wfds,
 232                       target_long *target_efds, struct target_timeval *target_tv)
 233 {
 234     fd_set rfds, wfds, efds;
 235     fd_set *rfds_ptr, *wfds_ptr, *efds_ptr;
 236     struct timeval tv, *tv_ptr;
 237     long ret;
 238
 239     rfds_ptr = target_to_host_fds(&rfds, target_rfds, n);
 240     wfds_ptr = target_to_host_fds(&wfds, target_wfds, n);
 241     efds_ptr = target_to_host_fds(&efds, target_efds, n);
 242
 243     if (target_tv) {
 244         target_to_host_timeval(&tv, target_tv);
 245         tv_ptr = &tv;
 246     } else {
 247         tv_ptr = NULL;
 248     }
 249     ret = get_errno(select(n, rfds_ptr, wfds_ptr, efds_ptr, tv_ptr));
 250     if (!is_error(ret)) {
 251         host_to_target_fds(target_rfds, rfds_ptr, n);
 252         host_to_target_fds(target_wfds, wfds_ptr, n);
 253         host_to_target_fds(target_efds, efds_ptr, n);
 254
 255         if (target_tv) {
 256             host_to_target_timeval(target_tv, &tv);
 257         }
 258     }
 259     return ret;
 260 }
 261
 262 static inline void target_to_host_sockaddr(struct sockaddr *addr,
 263                                            struct target_sockaddr *target_addr,
 264                                            socklen_t len)
 265 {
 266     memcpy(addr, target_addr, len);
 267     addr->sa_family = tswap16(target_addr->sa_family);
 268 }
 269
 270 static inline void host_to_target_sockaddr(struct target_sockaddr *target_addr,
 271                                            struct sockaddr *addr,
 272                                            socklen_t len)
 273 {
 274     memcpy(target_addr, addr, len);
 275     target_addr->sa_family = tswap16(addr->sa_family);
 276 }
 277
 278 static inline void target_to_host_cmsg(struct msghdr *msgh,
 279                                        struct target_msghdr *target_msgh)
 280 {
 281     struct cmsghdr *cmsg = CMSG_FIRSTHDR(msgh);
 282     struct target_cmsghdr *target_cmsg = TARGET_CMSG_FIRSTHDR(target_msgh);
 283     socklen_t space = 0;
 284
 285     while (cmsg && target_cmsg) {
 286         void *data = CMSG_DATA(cmsg);
 287         void *target_data = TARGET_CMSG_DATA(target_cmsg);
 288
 289         int len = tswapl(target_cmsg->cmsg_len)
 290                   - TARGET_CMSG_ALIGN(sizeof (struct target_cmsghdr));
 291
 292         space += CMSG_SPACE(len);
 293         if (space > msgh->msg_controllen) {
 294             space -= CMSG_SPACE(len);
 295             gemu_log("Host cmsg overflow");
 296             break;
 297         }
 298
 299         cmsg->cmsg_level = tswap32(target_cmsg->cmsg_level);
 300         cmsg->cmsg_type = tswap32(target_cmsg->cmsg_type);
 301         cmsg->cmsg_len = CMSG_LEN(len);
 302
 303         if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
 304             gemu_log("Unsupported ancillary data: %d/%d\n", cmsg->cmsg_level, cmsg->cmsg_type);
 305             memcpy(data, target_data, len);
 306         } else {
 307             int *fd = (int *)data;
 308             int *target_fd = (int *)target_data;
 309             int i, numfds = len / sizeof(int);
 310
 311             for (i = 0; i < numfds; i++)
 312                 fd[i] = tswap32(target_fd[i]);
 313         }
 314
 315         cmsg = CMSG_NXTHDR(msgh, cmsg);
 316         target_cmsg = TARGET_CMSG_NXTHDR(target_msgh, target_cmsg);
 317     }
 318
 319     msgh->msg_controllen = space;
 320 }
 321
 322 static inline void host_to_target_cmsg(struct target_msghdr *target_msgh,
 323                                        struct msghdr *msgh)
 324 {
 325     struct cmsghdr *cmsg = CMSG_FIRSTHDR(msgh);
 326     struct target_cmsghdr *target_cmsg = TARGET_CMSG_FIRSTHDR(target_msgh);
 327     socklen_t space = 0;
 328
 329     while (cmsg && target_cmsg) {
 330         void *data = CMSG_DATA(cmsg);
 331         void *target_data = TARGET_CMSG_DATA(target_cmsg);
 332
 333         int len = cmsg->cmsg_len - CMSG_ALIGN(sizeof (struct cmsghdr));
 334
 335         space += TARGET_CMSG_SPACE(len);
 336         if (space > tswapl(target_msgh->msg_controllen)) {
 337             space -= TARGET_CMSG_SPACE(len);
 338             gemu_log("Target cmsg overflow");
 339             break;
 340         }
 341
 342         target_cmsg->cmsg_level = tswap32(cmsg->cmsg_level);
 343         target_cmsg->cmsg_type = tswap32(cmsg->cmsg_type);
 344         target_cmsg->cmsg_len = tswapl(TARGET_CMSG_LEN(len));
 345
 346         if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
 347             gemu_log("Unsupported ancillary data: %d/%d\n", cmsg->cmsg_level, cmsg->cmsg_type);
 348             memcpy(target_data, data, len);
 349         } else {
 350             int *fd = (int *)data;
 351             int *target_fd = (int *)target_data;
 352             int i, numfds = len / sizeof(int);
 353
 354             for (i = 0; i < numfds; i++)
 355                 target_fd[i] = tswap32(fd[i]);
 356         }
 357
 358         cmsg = CMSG_NXTHDR(msgh, cmsg);
 359         target_cmsg = TARGET_CMSG_NXTHDR(target_msgh, target_cmsg);
 360     }
 361
 362     msgh->msg_controllen = tswapl(space);
 363 }
 364
 365 static long do_setsockopt(int sockfd, int level, int optname,
 366                           void *optval, socklen_t optlen)
 367 {
 368     if (level == SOL_TCP) {
 369         /* TCP options all take an 'int' value.  */
 370         int val;
 371
 372         if (optlen < sizeof(uint32_t))
 373             return -EINVAL;
 374
 375         val = tswap32(*(uint32_t *)optval);
 376         return get_errno(setsockopt(sockfd, level, optname, &val, sizeof(val)));
 377     }
 378
 379     else if (level != SOL_SOCKET) {
 380         gemu_log("Unsupported setsockopt level: %d\n", level);
 381         return -ENOSYS;
 382     }
 383
 384     switch (optname) {
 385     /* Options with 'int' argument.  */
 386     case SO_DEBUG:
 387     case SO_REUSEADDR:
 388     case SO_TYPE:
 389     case SO_ERROR:
 390     case SO_DONTROUTE:
 391     case SO_BROADCAST:
 392     case SO_SNDBUF:
 393     case SO_RCVBUF:
 394     case SO_KEEPALIVE:
 395     case SO_OOBINLINE:
 396     case SO_NO_CHECK:
 397     case SO_PRIORITY:
 398     case SO_BSDCOMPAT:
 399     case SO_PASSCRED:
 400     case SO_TIMESTAMP:
 401     case SO_RCVLOWAT:
 402     case SO_RCVTIMEO:
 403     case SO_SNDTIMEO:
 404     {
 405         int val;
 406         if (optlen < sizeof(uint32_t))
 407             return -EINVAL;
 408         val = tswap32(*(uint32_t *)optval);
 409         return get_errno(setsockopt(sockfd, level, optname, &val, sizeof(val)));
 410     }
 411
 412     default:
 413         gemu_log("Unsupported setsockopt SOL_SOCKET option: %d\n", optname);
 414         return -ENOSYS;
 415     }
 416 }
 417
 418 static long do_getsockopt(int sockfd, int level, int optname,
 419                           void *optval, socklen_t *optlen)
 420 {
 421     gemu_log("getsockopt not yet supported\n");
 422     return -ENOSYS;
 423 }
 424
 425 static long do_socketcall(int num, int32_t *vptr)
 426 {
 427     long ret;
 428
 429     switch(num) {
 430     case SOCKOP_socket:
 431         {
 432             int domain = tswap32(vptr[0]);
 433             int type = tswap32(vptr[1]);
 434             int protocol = tswap32(vptr[2]);
 435
 436             ret = get_errno(socket(domain, type, protocol));
 437         }
 438         break;
 439     case SOCKOP_bind:
 440         {
 441             int sockfd = tswap32(vptr[0]);
 442             void *target_addr = (void *)tswap32(vptr[1]);
 443             socklen_t addrlen = tswap32(vptr[2]);
 444             void *addr = alloca(addrlen);
 445
 446             target_to_host_sockaddr(addr, target_addr, addrlen);
 447             ret = get_errno(bind(sockfd, addr, addrlen));
 448         }
 449         break;
 450     case SOCKOP_connect:
 451         {
 452             int sockfd = tswap32(vptr[0]);
 453             void *target_addr = (void *)tswap32(vptr[1]);
 454             socklen_t addrlen = tswap32(vptr[2]);
 455             void *addr = alloca(addrlen);
 456
 457             target_to_host_sockaddr(addr, target_addr, addrlen);
 458             ret = get_errno(connect(sockfd, addr, addrlen));
 459         }
 460         break;
 461     case SOCKOP_listen:
 462         {
 463             int sockfd = tswap32(vptr[0]);
 464             int backlog = tswap32(vptr[1]);
 465
 466             ret = get_errno(listen(sockfd, backlog));
 467         }
 468         break;
 469     case SOCKOP_accept:
 470         {
 471             int sockfd = tswap32(vptr[0]);
 472             void *target_addr = (void *)tswap32(vptr[1]);
 473             uint32_t *target_addrlen = (void *)tswap32(vptr[2]);
 474             socklen_t addrlen = tswap32(*target_addrlen);
 475             void *addr = alloca(addrlen);
 476
 477             ret = get_errno(accept(sockfd, addr, &addrlen));
 478             if (!is_error(ret)) {
 479                 host_to_target_sockaddr(target_addr, addr, addrlen);
 480                 *target_addrlen = tswap32(addrlen);
 481             }
 482         }
 483         break;
 484     case SOCKOP_getsockname:
 485         {
 486             int sockfd = tswap32(vptr[0]);
 487             void *target_addr = (void *)tswap32(vptr[1]);
 488             uint32_t *target_addrlen = (void *)tswap32(vptr[2]);
 489             socklen_t addrlen = tswap32(*target_addrlen);
 490             void *addr = alloca(addrlen);
 491
 492             ret = get_errno(getsockname(sockfd, addr, &addrlen));
 493             if (!is_error(ret)) {
 494                 host_to_target_sockaddr(target_addr, addr, addrlen);
 495                 *target_addrlen = tswap32(addrlen);
 496             }
 497         }
 498         break;
 499     case SOCKOP_getpeername:
 500         {
 501             int sockfd = tswap32(vptr[0]);
 502             void *target_addr = (void *)tswap32(vptr[1]);
 503             uint32_t *target_addrlen = (void *)tswap32(vptr[2]);
 504             socklen_t addrlen = tswap32(*target_addrlen);
 505             void *addr = alloca(addrlen);
 506
 507             ret = get_errno(getpeername(sockfd, addr, &addrlen));
 508             if (!is_error(ret)) {
 509                 host_to_target_sockaddr(target_addr, addr, addrlen);
 510                 *target_addrlen = tswap32(addrlen);
 511             }
 512         }
 513         break;
 514     case SOCKOP_socketpair:
 515         {
 516             int domain = tswap32(vptr[0]);
 517             int type = tswap32(vptr[1]);
 518             int protocol = tswap32(vptr[2]);
 519             int32_t *target_tab = (void *)tswap32(vptr[3]);
 520             int tab[2];
 521
 522             ret = get_errno(socketpair(domain, type, protocol, tab));
 523             if (!is_error(ret)) {
 524                 target_tab[0] = tswap32(tab[0]);
 525                 target_tab[1] = tswap32(tab[1]);
 526             }
 527         }
 528         break;
 529     case SOCKOP_send:
 530         {
 531             int sockfd = tswap32(vptr[0]);
 532             void *msg = (void *)tswap32(vptr[1]);
 533             size_t len = tswap32(vptr[2]);
 534             int flags = tswap32(vptr[3]);
 535
 536             ret = get_errno(send(sockfd, msg, len, flags));
 537         }
 538         break;
 539     case SOCKOP_recv:
 540         {
 541             int sockfd = tswap32(vptr[0]);
 542             void *msg = (void *)tswap32(vptr[1]);
 543             size_t len = tswap32(vptr[2]);
 544             int flags = tswap32(vptr[3]);
 545
 546             ret = get_errno(recv(sockfd, msg, len, flags));
 547         }
 548         break;
 549     case SOCKOP_sendto:
 550         {
 551             int sockfd = tswap32(vptr[0]);
 552             void *msg = (void *)tswap32(vptr[1]);
 553             size_t len = tswap32(vptr[2]);
 554             int flags = tswap32(vptr[3]);
 555             void *target_addr = (void *)tswap32(vptr[4]);
 556             socklen_t addrlen = tswap32(vptr[5]);
 557             void *addr = alloca(addrlen);
 558
 559             target_to_host_sockaddr(addr, target_addr, addrlen);
 560             ret = get_errno(sendto(sockfd, msg, len, flags, addr, addrlen));
 561         }
 562         break;
 563     case SOCKOP_recvfrom:
 564         {
 565             int sockfd = tswap32(vptr[0]);
 566             void *msg = (void *)tswap32(vptr[1]);
 567             size_t len = tswap32(vptr[2]);
 568             int flags = tswap32(vptr[3]);
 569             void *target_addr = (void *)tswap32(vptr[4]);
 570             uint32_t *target_addrlen = (void *)tswap32(vptr[5]);
 571             socklen_t addrlen = tswap32(*target_addrlen);
 572             void *addr = alloca(addrlen);
 573
 574             ret = get_errno(recvfrom(sockfd, msg, len, flags, addr, &addrlen));
 575             if (!is_error(ret)) {
 576                 host_to_target_sockaddr(target_addr, addr, addrlen);
 577                 *target_addrlen = tswap32(addrlen);
 578             }
 579         }
 580         break;
 581     case SOCKOP_shutdown:
 582         {
 583             int sockfd = tswap32(vptr[0]);
 584             int how = tswap32(vptr[1]);
 585
 586             ret = get_errno(shutdown(sockfd, how));
 587         }
 588         break;
 589     case SOCKOP_sendmsg:
 590     case SOCKOP_recvmsg:
 591         {
 592             int fd;
 593             struct target_msghdr *msgp;
 594             struct msghdr msg;
 595             int flags, count, i;
 596             struct iovec *vec;
 597             struct target_iovec *target_vec;
 598
 599             msgp = (void *)tswap32(vptr[1]);
 600             msg.msg_name = (void *)tswapl(msgp->msg_name);
 601             msg.msg_namelen = tswapl(msgp->msg_namelen);
 602             msg.msg_controllen = 2 * tswapl(msgp->msg_controllen);
 603             msg.msg_control = alloca(msg.msg_controllen);
 604             msg.msg_flags = tswap32(msgp->msg_flags);
 605
 606             count = tswapl(msgp->msg_iovlen);
 607             vec = alloca(count * sizeof(struct iovec));
 608             target_vec = (void *)tswapl(msgp->msg_iov);
 609             for(i = 0;i < count; i++) {
 610                 vec[i].iov_base = (void *)tswapl(target_vec[i].iov_base);
 611                 vec[i].iov_len = tswapl(target_vec[i].iov_len);
 612             }
 613             msg.msg_iovlen = count;
 614             msg.msg_iov = vec;
 615
 616             fd = tswap32(vptr[0]);
 617             flags = tswap32(vptr[2]);
 618             if (num == SOCKOP_sendmsg) {
 619                 target_to_host_cmsg(&msg, msgp);
 620                 ret = get_errno(sendmsg(fd, &msg, flags));
 621             } else {
 622                 ret = get_errno(recvmsg(fd, &msg, flags));
 623                 if (!is_error(ret))
 624                   host_to_target_cmsg(msgp, &msg);
 625             }
 626         }
 627         break;
 628     case SOCKOP_setsockopt:
 629         {
 630             int sockfd = tswap32(vptr[0]);
 631             int level = tswap32(vptr[1]);
 632             int optname = tswap32(vptr[2]);
 633             void *optval = (void *)tswap32(vptr[3]);
 634             socklen_t optlen = tswap32(vptr[4]);
 635
 636             ret = do_setsockopt(sockfd, level, optname, optval, optlen);
 637         }
 638         break;
 639     case SOCKOP_getsockopt:
 640         {
 641             int sockfd = tswap32(vptr[0]);
 642             int level = tswap32(vptr[1]);
 643             int optname = tswap32(vptr[2]);
 644             void *optval = (void *)tswap32(vptr[3]);
 645             uint32_t *target_len = (void *)tswap32(vptr[4]);
 646             socklen_t optlen = tswap32(*target_len);
 647
 648             ret = do_getsockopt(sockfd, level, optname, optval, &optlen);
 649             if (!is_error(ret))
 650                 *target_len = tswap32(optlen);
 651         }
 652         break;
 653     default:
 654         gemu_log("Unsupported socketcall: %d\n", num);
 655         ret = -ENOSYS;
 656         break;
 657     }
 658     return ret;
 659 }
 660
 661 /* kernel structure types definitions */
 662 #define IFNAMSIZ        16
 663
 664 #define STRUCT(name, list...) STRUCT_ ## name,
 665 #define STRUCT_SPECIAL(name) STRUCT_ ## name,
 666 enum {
 667 #include "syscall_types.h"
 668 };
 669 #undef STRUCT
 670 #undef STRUCT_SPECIAL
 671
 672 #define STRUCT(name, list...) const argtype struct_ ## name ## _def[] = { list, TYPE_NULL };
 673 #define STRUCT_SPECIAL(name)
 674 #include "syscall_types.h"
 675 #undef STRUCT
 676 #undef STRUCT_SPECIAL
 677
 678 typedef struct IOCTLEntry {
 679     int target_cmd;
 680     int host_cmd;
 681     const char *name;
 682     int access;
 683     const argtype arg_type[5];
 684 } IOCTLEntry;
 685
 686 #define IOC_R 0x0001
 687 #define IOC_W 0x0002
 688 #define IOC_RW (IOC_R | IOC_W)
 689
 690 #define MAX_STRUCT_SIZE 4096
 691
 692 const IOCTLEntry ioctl_entries[] = {
 693 #define IOCTL(cmd, access, types...) \
 694     { TARGET_ ## cmd, cmd, #cmd, access, { types } },
 695 #include "ioctls.h"
 696     { 0, 0, },
 697 };
 698
 699 static long do_ioctl(long fd, long cmd, long arg)
 700 {
 701     const IOCTLEntry *ie;
 702     const argtype *arg_type;
 703     long ret;
 704     uint8_t buf_temp[MAX_STRUCT_SIZE];
 705
 706     ie = ioctl_entries;
 707     for(;;) {
 708         if (ie->target_cmd == 0) {
 709             gemu_log("Unsupported ioctl: cmd=0x%04lx\n", cmd);
 710             return -ENOSYS;
 711         }
 712         if (ie->target_cmd == cmd)
 713             break;
 714         ie++;
 715     }
 716     arg_type = ie->arg_type;
 717 #if defined(DEBUG)
 718     gemu_log("ioctl: cmd=0x%04lx (%s)\n", cmd, ie->name);
 719 #endif
 720     switch(arg_type[0]) {
 721     case TYPE_NULL:
 722         /* no argument */
 723         ret = get_errno(ioctl(fd, ie->host_cmd));
 724         break;
 725     case TYPE_PTRVOID:
 726     case TYPE_INT:
 727         /* int argment */
 728         ret = get_errno(ioctl(fd, ie->host_cmd, arg));
 729         break;
 730     case TYPE_PTR:
 731         arg_type++;
 732         switch(ie->access) {
 733         case IOC_R:
 734             ret = get_errno(ioctl(fd, ie->host_cmd, buf_temp));
 735             if (!is_error(ret)) {
 736                 thunk_convert((void *)arg, buf_temp, arg_type, THUNK_TARGET);
 737             }
 738             break;
 739         case IOC_W:
 740             thunk_convert(buf_temp, (void *)arg, arg_type, THUNK_HOST);
 741             ret = get_errno(ioctl(fd, ie->host_cmd, buf_temp));
 742             break;
 743         default:
 744         case IOC_RW:
 745             thunk_convert(buf_temp, (void *)arg, arg_type, THUNK_HOST);
 746             ret = get_errno(ioctl(fd, ie->host_cmd, buf_temp));
 747             if (!is_error(ret)) {
 748                 thunk_convert((void *)arg, buf_temp, arg_type, THUNK_TARGET);
 749             }
 750             break;
 751         }
 752         break;
 753     default:
 754         gemu_log("Unsupported ioctl type: cmd=0x%04lx type=%d\n", cmd, arg_type[0]);
 755         ret = -ENOSYS;
 756         break;
 757     }
 758     return ret;
 759 }
 760
 761 bitmask_transtbl iflag_tbl[] = {
 762         { TARGET_IGNBRK, TARGET_IGNBRK, IGNBRK, IGNBRK },
 763         { TARGET_BRKINT, TARGET_BRKINT, BRKINT, BRKINT },
 764         { TARGET_IGNPAR, TARGET_IGNPAR, IGNPAR, IGNPAR },
 765         { TARGET_PARMRK, TARGET_PARMRK, PARMRK, PARMRK },
 766         { TARGET_INPCK, TARGET_INPCK, INPCK, INPCK },
 767         { TARGET_ISTRIP, TARGET_ISTRIP, ISTRIP, ISTRIP },
 768         { TARGET_INLCR, TARGET_INLCR, INLCR, INLCR },
 769         { TARGET_IGNCR, TARGET_IGNCR, IGNCR, IGNCR },
 770         { TARGET_ICRNL, TARGET_ICRNL, ICRNL, ICRNL },
 771         { TARGET_IUCLC, TARGET_IUCLC, IUCLC, IUCLC },
 772         { TARGET_IXON, TARGET_IXON, IXON, IXON },
 773         { TARGET_IXANY, TARGET_IXANY, IXANY, IXANY },
 774         { TARGET_IXOFF, TARGET_IXOFF, IXOFF, IXOFF },
 775         { TARGET_IMAXBEL, TARGET_IMAXBEL, IMAXBEL, IMAXBEL },
 776         { 0, 0, 0, 0 }
 777 };
 778
 779 bitmask_transtbl oflag_tbl[] = {
 780         { TARGET_OPOST, TARGET_OPOST, OPOST, OPOST },
 781         { TARGET_OLCUC, TARGET_OLCUC, OLCUC, OLCUC },
 782         { TARGET_ONLCR, TARGET_ONLCR, ONLCR, ONLCR },
 783         { TARGET_OCRNL, TARGET_OCRNL, OCRNL, OCRNL },
 784         { TARGET_ONOCR, TARGET_ONOCR, ONOCR, ONOCR },
 785         { TARGET_ONLRET, TARGET_ONLRET, ONLRET, ONLRET },
 786         { TARGET_OFILL, TARGET_OFILL, OFILL, OFILL },
 787         { TARGET_OFDEL, TARGET_OFDEL, OFDEL, OFDEL },
 788         { TARGET_NLDLY, TARGET_NL0, NLDLY, NL0 },
 789         { TARGET_NLDLY, TARGET_NL1, NLDLY, NL1 },
 790         { TARGET_CRDLY, TARGET_CR0, CRDLY, CR0 },
 791         { TARGET_CRDLY, TARGET_CR1, CRDLY, CR1 },
 792         { TARGET_CRDLY, TARGET_CR2, CRDLY, CR2 },
 793         { TARGET_CRDLY, TARGET_CR3, CRDLY, CR3 },
 794         { TARGET_TABDLY, TARGET_TAB0, TABDLY, TAB0 },
 795         { TARGET_TABDLY, TARGET_TAB1, TABDLY, TAB1 },
 796         { TARGET_TABDLY, TARGET_TAB2, TABDLY, TAB2 },
 797         { TARGET_TABDLY, TARGET_TAB3, TABDLY, TAB3 },
 798         { TARGET_BSDLY, TARGET_BS0, BSDLY, BS0 },
 799         { TARGET_BSDLY, TARGET_BS1, BSDLY, BS1 },
 800         { TARGET_VTDLY, TARGET_VT0, VTDLY, VT0 },
 801         { TARGET_VTDLY, TARGET_VT1, VTDLY, VT1 },
 802         { TARGET_FFDLY, TARGET_FF0, FFDLY, FF0 },
 803         { TARGET_FFDLY, TARGET_FF1, FFDLY, FF1 },
 804         { 0, 0, 0, 0 }
 805 };
 806
 807 bitmask_transtbl cflag_tbl[] = {
 808         { TARGET_CBAUD, TARGET_B0, CBAUD, B0 },
 809         { TARGET_CBAUD, TARGET_B50, CBAUD, B50 },
 810         { TARGET_CBAUD, TARGET_B75, CBAUD, B75 },
 811         { TARGET_CBAUD, TARGET_B110, CBAUD, B110 },
 812         { TARGET_CBAUD, TARGET_B134, CBAUD, B134 },
 813         { TARGET_CBAUD, TARGET_B150, CBAUD, B150 },
 814         { TARGET_CBAUD, TARGET_B200, CBAUD, B200 },
 815         { TARGET_CBAUD, TARGET_B300, CBAUD, B300 },
 816         { TARGET_CBAUD, TARGET_B600, CBAUD, B600 },
 817         { TARGET_CBAUD, TARGET_B1200, CBAUD, B1200 },
 818         { TARGET_CBAUD, TARGET_B1800, CBAUD, B1800 },
 819         { TARGET_CBAUD, TARGET_B2400, CBAUD, B2400 },
 820         { TARGET_CBAUD, TARGET_B4800, CBAUD, B4800 },
 821         { TARGET_CBAUD, TARGET_B9600, CBAUD, B9600 },
 822         { TARGET_CBAUD, TARGET_B19200, CBAUD, B19200 },
 823         { TARGET_CBAUD, TARGET_B38400, CBAUD, B38400 },
 824         { TARGET_CBAUD, TARGET_B57600, CBAUD, B57600 },
 825         { TARGET_CBAUD, TARGET_B115200, CBAUD, B115200 },
 826         { TARGET_CBAUD, TARGET_B230400, CBAUD, B230400 },
 827         { TARGET_CBAUD, TARGET_B460800, CBAUD, B460800 },
 828         { TARGET_CSIZE, TARGET_CS5, CSIZE, CS5 },
 829         { TARGET_CSIZE, TARGET_CS6, CSIZE, CS6 },
 830         { TARGET_CSIZE, TARGET_CS7, CSIZE, CS7 },
 831         { TARGET_CSIZE, TARGET_CS8, CSIZE, CS8 },
 832         { TARGET_CSTOPB, TARGET_CSTOPB, CSTOPB, CSTOPB },
 833         { TARGET_CREAD, TARGET_CREAD, CREAD, CREAD },
 834         { TARGET_PARENB, TARGET_PARENB, PARENB, PARENB },
 835         { TARGET_PARODD, TARGET_PARODD, PARODD, PARODD },
 836         { TARGET_HUPCL, TARGET_HUPCL, HUPCL, HUPCL },
 837         { TARGET_CLOCAL, TARGET_CLOCAL, CLOCAL, CLOCAL },
 838         { TARGET_CRTSCTS, TARGET_CRTSCTS, CRTSCTS, CRTSCTS },
 839         { 0, 0, 0, 0 }
 840 };
 841
 842 bitmask_transtbl lflag_tbl[] = {
 843         { TARGET_ISIG, TARGET_ISIG, ISIG, ISIG },
 844         { TARGET_ICANON, TARGET_ICANON, ICANON, ICANON },
 845         { TARGET_XCASE, TARGET_XCASE, XCASE, XCASE },
 846         { TARGET_ECHO, TARGET_ECHO, ECHO, ECHO },
 847         { TARGET_ECHOE, TARGET_ECHOE, ECHOE, ECHOE },
 848         { TARGET_ECHOK, TARGET_ECHOK, ECHOK, ECHOK },
 849         { TARGET_ECHONL, TARGET_ECHONL, ECHONL, ECHONL },
 850         { TARGET_NOFLSH, TARGET_NOFLSH, NOFLSH, NOFLSH },
 851         { TARGET_TOSTOP, TARGET_TOSTOP, TOSTOP, TOSTOP },
 852         { TARGET_ECHOCTL, TARGET_ECHOCTL, ECHOCTL, ECHOCTL },
 853         { TARGET_ECHOPRT, TARGET_ECHOPRT, ECHOPRT, ECHOPRT },
 854         { TARGET_ECHOKE, TARGET_ECHOKE, ECHOKE, ECHOKE },
 855         { TARGET_FLUSHO, TARGET_FLUSHO, FLUSHO, FLUSHO },
 856         { TARGET_PENDIN, TARGET_PENDIN, PENDIN, PENDIN },
 857         { TARGET_IEXTEN, TARGET_IEXTEN, IEXTEN, IEXTEN },
 858         { 0, 0, 0, 0 }
 859 };
 860
 861 static void target_to_host_termios (void *dst, const void *src)
 862 {
 863     struct host_termios *host = dst;
 864     const struct target_termios *target = src;
 865
 866     host->c_iflag =
 867         target_to_host_bitmask(tswap32(target->c_iflag), iflag_tbl);
 868     host->c_oflag =
 869         target_to_host_bitmask(tswap32(target->c_oflag), oflag_tbl);
 870     host->c_cflag =
 871         target_to_host_bitmask(tswap32(target->c_cflag), cflag_tbl);
 872     host->c_lflag =
 873         target_to_host_bitmask(tswap32(target->c_lflag), lflag_tbl);
 874     host->c_line = target->c_line;
 875
 876     host->c_cc[VINTR] = target->c_cc[TARGET_VINTR];
 877     host->c_cc[VQUIT] = target->c_cc[TARGET_VQUIT];
 878     host->c_cc[VERASE] = target->c_cc[TARGET_VERASE];
 879     host->c_cc[VKILL] = target->c_cc[TARGET_VKILL];
 880     host->c_cc[VEOF] = target->c_cc[TARGET_VEOF];
 881     host->c_cc[VTIME] = target->c_cc[TARGET_VTIME];
 882     host->c_cc[VMIN] = target->c_cc[TARGET_VMIN];
 883     host->c_cc[VSWTC] = target->c_cc[TARGET_VSWTC];
 884     host->c_cc[VSTART] = target->c_cc[TARGET_VSTART];
 885     host->c_cc[VSTOP] = target->c_cc[TARGET_VSTOP];
 886     host->c_cc[VSUSP] = target->c_cc[TARGET_VSUSP];
 887     host->c_cc[VEOL] = target->c_cc[TARGET_VEOL];
 888     host->c_cc[VREPRINT] = target->c_cc[TARGET_VREPRINT];
 889     host->c_cc[VDISCARD] = target->c_cc[TARGET_VDISCARD];
 890     host->c_cc[VWERASE] = target->c_cc[TARGET_VWERASE];
 891     host->c_cc[VLNEXT] = target->c_cc[TARGET_VLNEXT];
 892     host->c_cc[VEOL2] = target->c_cc[TARGET_VEOL2];
 893 }
 894
 895 static void host_to_target_termios (void *dst, const void *src)
 896 {
 897     struct target_termios *target = dst;
 898     const struct host_termios *host = src;
 899
 900     target->c_iflag =
 901         tswap32(host_to_target_bitmask(host->c_iflag, iflag_tbl));
 902     target->c_oflag =
 903         tswap32(host_to_target_bitmask(host->c_oflag, oflag_tbl));
 904     target->c_cflag =
 905         tswap32(host_to_target_bitmask(host->c_cflag, cflag_tbl));
 906     target->c_lflag =
 907         tswap32(host_to_target_bitmask(host->c_lflag, lflag_tbl));
 908     target->c_line = host->c_line;
 909
 910     target->c_cc[TARGET_VINTR] = host->c_cc[VINTR];
 911     target->c_cc[TARGET_VQUIT] = host->c_cc[VQUIT];
 912     target->c_cc[TARGET_VERASE] = host->c_cc[VERASE];
 913     target->c_cc[TARGET_VKILL] = host->c_cc[VKILL];
 914     target->c_cc[TARGET_VEOF] = host->c_cc[VEOF];
 915     target->c_cc[TARGET_VTIME] = host->c_cc[VTIME];
 916     target->c_cc[TARGET_VMIN] = host->c_cc[VMIN];
 917     target->c_cc[TARGET_VSWTC] = host->c_cc[VSWTC];
 918     target->c_cc[TARGET_VSTART] = host->c_cc[VSTART];
 919     target->c_cc[TARGET_VSTOP] = host->c_cc[VSTOP];
 920     target->c_cc[TARGET_VSUSP] = host->c_cc[VSUSP];
 921     target->c_cc[TARGET_VEOL] = host->c_cc[VEOL];
 922     target->c_cc[TARGET_VREPRINT] = host->c_cc[VREPRINT];
 923     target->c_cc[TARGET_VDISCARD] = host->c_cc[VDISCARD];
 924     target->c_cc[TARGET_VWERASE] = host->c_cc[VWERASE];
 925     target->c_cc[TARGET_VLNEXT] = host->c_cc[VLNEXT];
 926     target->c_cc[TARGET_VEOL2] = host->c_cc[VEOL2];
 927 }
 928
 929 StructEntry struct_termios_def = {
 930     .convert = { host_to_target_termios, target_to_host_termios },
 931     .size = { sizeof(struct target_termios), sizeof(struct host_termios) },
 932     .align = { __alignof__(struct target_termios), __alignof__(struct host_termios) },
 933 };
 934
 935 #ifdef TARGET_I386
 936
 937 /* NOTE: there is really one LDT for all the threads */
 938 uint8_t *ldt_table;
 939
 940 static int read_ldt(void *ptr, unsigned long bytecount)
 941 {
 942     int size;
 943
 944     if (!ldt_table)
 945         return 0;
 946     size = TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE;
 947     if (size > bytecount)
 948         size = bytecount;
 949     memcpy(ptr, ldt_table, size);
 950     return size;
 951 }
 952
 953 /* XXX: add locking support */
 954 static int write_ldt(CPUX86State *env,
 955                      void *ptr, unsigned long bytecount, int oldmode)
 956 {
 957     struct target_modify_ldt_ldt_s ldt_info;
 958     int seg_32bit, contents, read_exec_only, limit_in_pages;
 959     int seg_not_present, useable;
 960     uint32_t *lp, entry_1, entry_2;
 961
 962     if (bytecount != sizeof(ldt_info))
 963         return -EINVAL;
 964     memcpy(&ldt_info, ptr, sizeof(ldt_info));
 965     tswap32s(&ldt_info.entry_number);
 966     tswapls((long *)&ldt_info.base_addr);
 967     tswap32s(&ldt_info.limit);
 968     tswap32s(&ldt_info.flags);
 969
 970     if (ldt_info.entry_number >= TARGET_LDT_ENTRIES)
 971         return -EINVAL;
 972     seg_32bit = ldt_info.flags & 1;
 973     contents = (ldt_info.flags >> 1) & 3;
 974     read_exec_only = (ldt_info.flags >> 3) & 1;
 975     limit_in_pages = (ldt_info.flags >> 4) & 1;
 976     seg_not_present = (ldt_info.flags >> 5) & 1;
 977     useable = (ldt_info.flags >> 6) & 1;
 978
 979     if (contents == 3) {
 980         if (oldmode)
 981             return -EINVAL;
 982         if (seg_not_present == 0)
 983             return -EINVAL;
 984     }
 985     /* allocate the LDT */
 986     if (!ldt_table) {
 987         ldt_table = malloc(TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE);
 988         if (!ldt_table)
 989             return -ENOMEM;
 990         memset(ldt_table, 0, TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE);
 991         env->ldt.base = ldt_table;
 992         env->ldt.limit = 0xffff;
 993     }
 994
 995     /* NOTE: same code as Linux kernel */
 996     /* Allow LDTs to be cleared by the user. */
 997     if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
 998         if (oldmode ||
 999             (contents == 0              &&
1000              read_exec_only == 1        &&
1001              seg_32bit == 0             &&
1002              limit_in_pages == 0        &&
1003              seg_not_present == 1       &&
1004              useable == 0 )) {
1005             entry_1 = 0;
1006             entry_2 = 0;
1007             goto install;
1008         }
1009     }
1010
1011     entry_1 = ((ldt_info.base_addr & 0x0000ffff) << 16) |
1012         (ldt_info.limit & 0x0ffff);
1013     entry_2 = (ldt_info.base_addr & 0xff000000) |
1014         ((ldt_info.base_addr & 0x00ff0000) >> 16) |
1015         (ldt_info.limit & 0xf0000) |
1016         ((read_exec_only ^ 1) << 9) |
1017         (contents << 10) |
1018         ((seg_not_present ^ 1) << 15) |
1019         (seg_32bit << 22) |
1020         (limit_in_pages << 23) |
1021         0x7000;
1022     if (!oldmode)
1023         entry_2 |= (useable << 20);
1024
1025     /* Install the new entry ...  */
1026 install:
1027     lp = (uint32_t *)(ldt_table + (ldt_info.entry_number << 3));
1028     lp[0] = tswap32(entry_1);
1029     lp[1] = tswap32(entry_2);
1030     return 0;
1031 }
1032
1033 /* specific and weird i386 syscalls */
1034 int do_modify_ldt(CPUX86State *env, int func, void *ptr, unsigned long bytecount)
1035 {
1036     int ret = -ENOSYS;
1037
1038     switch (func) {
1039     case 0:
1040         ret = read_ldt(ptr, bytecount);
1041         break;
1042     case 1:
1043         ret = write_ldt(env, ptr, bytecount, 1);
1044         break;
1045     case 0x11:
1046         ret = write_ldt(env, ptr, bytecount, 0);
1047         break;
1048     }
1049     return ret;
1050 }
1051
1052 /* vm86 emulation */
1053
1054 #define SAFE_MASK  (0xDD5)
1055
1056 int do_vm86(CPUX86State *env, long subfunction,
1057             struct target_vm86plus_struct * target_v86)
1058 {
1059     TaskState *ts = env->opaque;
1060     int ret;
1061
1062     switch (subfunction) {
1063     case TARGET_VM86_REQUEST_IRQ:
1064     case TARGET_VM86_FREE_IRQ:
1065     case TARGET_VM86_GET_IRQ_BITS:
1066     case TARGET_VM86_GET_AND_RESET_IRQ:
1067         gemu_log("qemu: unsupported vm86 subfunction (%ld)\n", subfunction);
1068         ret = -EINVAL;
1069         goto out;
1070     case TARGET_VM86_PLUS_INSTALL_CHECK:
1071         /* NOTE: on old vm86 stuff this will return the error
1072            from verify_area(), because the subfunction is
1073            interpreted as (invalid) address to vm86_struct.
1074            So the installation check works.
1075             */
1076         ret = 0;
1077         goto out;
1078     }
1079
1080     ts->target_v86 = target_v86;
1081     /* save current CPU regs */
1082     ts->vm86_saved_regs.eax = 0; /* default vm86 syscall return code */
1083     ts->vm86_saved_regs.ebx = env->regs[R_EBX];
1084     ts->vm86_saved_regs.ecx = env->regs[R_ECX];
1085     ts->vm86_saved_regs.edx = env->regs[R_EDX];
1086     ts->vm86_saved_regs.esi = env->regs[R_ESI];
1087     ts->vm86_saved_regs.edi = env->regs[R_EDI];
1088     ts->vm86_saved_regs.ebp = env->regs[R_EBP];
1089     ts->vm86_saved_regs.esp = env->regs[R_ESP];
1090     ts->vm86_saved_regs.eflags = env->eflags;
1091     ts->vm86_saved_regs.eip  = env->eip;
1092     ts->vm86_saved_regs.cs = env->segs[R_CS];
1093     ts->vm86_saved_regs.ss = env->segs[R_SS];
1094     ts->vm86_saved_regs.ds = env->segs[R_DS];
1095     ts->vm86_saved_regs.es = env->segs[R_ES];
1096     ts->vm86_saved_regs.fs = env->segs[R_FS];
1097     ts->vm86_saved_regs.gs = env->segs[R_GS];
1098
1099     /* build vm86 CPU state */
1100     env->eflags = (env->eflags & ~SAFE_MASK) |
1101         (tswap32(target_v86->regs.eflags) & SAFE_MASK) | VM_MASK;
1102
1103     env->regs[R_EBX] = tswap32(target_v86->regs.ebx);
1104     env->regs[R_ECX] = tswap32(target_v86->regs.ecx);
1105     env->regs[R_EDX] = tswap32(target_v86->regs.edx);
1106     env->regs[R_ESI] = tswap32(target_v86->regs.esi);
1107     env->regs[R_EDI] = tswap32(target_v86->regs.edi);
1108     env->regs[R_EBP] = tswap32(target_v86->regs.ebp);
1109     env->regs[R_ESP] = tswap32(target_v86->regs.esp);
1110     env->eip = tswap32(target_v86->regs.eip);
1111     cpu_x86_load_seg(env, R_CS, tswap16(target_v86->regs.cs));
1112     cpu_x86_load_seg(env, R_SS, tswap16(target_v86->regs.ss));
1113     cpu_x86_load_seg(env, R_DS, tswap16(target_v86->regs.ds));
1114     cpu_x86_load_seg(env, R_ES, tswap16(target_v86->regs.es));
1115     cpu_x86_load_seg(env, R_FS, tswap16(target_v86->regs.fs));
1116     cpu_x86_load_seg(env, R_GS, tswap16(target_v86->regs.gs));
1117     ret = tswap32(target_v86->regs.eax); /* eax will be restored at
1118                                             the end of the syscall */
1119     /* now the virtual CPU is ready for vm86 execution ! */
1120  out:
1121     return ret;
1122 }
1123
1124 /* this stack is the equivalent of the kernel stack associated with a
1125    thread/process */
1126 #define NEW_STACK_SIZE 8192
1127
1128 static int clone_func(void *arg)
1129 {
1130     CPUX86State *env = arg;
1131     cpu_loop(env);
1132     /* never exits */
1133     return 0;
1134 }
1135
1136 int do_fork(CPUX86State *env, unsigned int flags, unsigned long newsp)
1137 {
1138     int ret;
1139     TaskState *ts;
1140     uint8_t *new_stack;
1141     CPUX86State *new_env;
1142
1143     if (flags & CLONE_VM) {
1144         if (!newsp)
1145             newsp = env->regs[R_ESP];
1146         ts = malloc(sizeof(TaskState) + NEW_STACK_SIZE);
1147         memset(ts, 0, sizeof(TaskState));
1148         new_stack = ts->stack;
1149         ts->used = 1;
1150         /* add in task state list */
1151         ts->next = first_task_state;
1152         first_task_state = ts;
1153         /* we create a new CPU instance. */
1154         new_env = cpu_x86_init();
1155         memcpy(new_env, env, sizeof(CPUX86State));
1156         new_env->regs[R_ESP] = newsp;
1157         new_env->regs[R_EAX] = 0;
1158         new_env->opaque = ts;
1159         ret = clone(clone_func, new_stack + NEW_STACK_SIZE, flags, new_env);
1160     } else {
1161         /* if no CLONE_VM, we consider it is a fork */
1162         if ((flags & ~CSIGNAL) != 0)
1163             return -EINVAL;
1164         ret = fork();
1165     }
1166     return ret;
1167 }
1168
1169 #endif
1170
1171 #define high2lowuid(x) (x)
1172 #define high2lowgid(x) (x)
1173 #define low2highuid(x) (x)
1174 #define low2highgid(x) (x)
1175
1176 void syscall_init(void)
1177 {
1178 #define STRUCT(name, list...) thunk_register_struct(STRUCT_ ## name, #name, struct_ ## name ## _def);
1179 #define STRUCT_SPECIAL(name) thunk_register_struct_direct(STRUCT_ ## name, #name, &struct_ ## name ## _def);
1180 #include "syscall_types.h"
1181 #undef STRUCT
1182 #undef STRUCT_SPECIAL
1183 }
1184
1185 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
1186                 long arg4, long arg5, long arg6)
1187 {
1188     long ret;
1189     struct stat st;
1190     struct kernel_statfs *stfs;
1191
1192 #ifdef DEBUG
1193     gemu_log("syscall %d\n", num);
1194 #endif
1195     switch(num) {
1196     case TARGET_NR_exit:
1197 #ifdef HAVE_GPROF
1198         _mcleanup();
1199 #endif
1200         /* XXX: should free thread stack and CPU env */
1201         _exit(arg1);
1202         ret = 0; /* avoid warning */
1203         break;
1204     case TARGET_NR_read:
1205         ret = get_errno(read(arg1, (void *)arg2, arg3));
1206         break;
1207     case TARGET_NR_write:
1208         ret = get_errno(write(arg1, (void *)arg2, arg3));
1209         break;
1210     case TARGET_NR_open:
1211         ret = get_errno(open((const char *)arg1, arg2, arg3));
1212         break;
1213     case TARGET_NR_close:
1214         ret = get_errno(close(arg1));
1215         break;
1216     case TARGET_NR_brk:
1217         ret = do_brk((char *)arg1);
1218         break;
1219     case TARGET_NR_fork:
1220         ret = get_errno(do_fork(cpu_env, SIGCHLD, 0));
1221         break;
1222     case TARGET_NR_waitpid:
1223         {
1224             int *status = (int *)arg2;
1225             ret = get_errno(waitpid(arg1, status, arg3));
1226             if (!is_error(ret) && status)
1227                 tswapls((long *)&status);
1228         }
1229         break;
1230     case TARGET_NR_creat:
1231         ret = get_errno(creat((const char *)arg1, arg2));
1232         break;
1233     case TARGET_NR_link:
1234         ret = get_errno(link((const char *)arg1, (const char *)arg2));
1235         break;
1236     case TARGET_NR_unlink:
1237         ret = get_errno(unlink((const char *)arg1));
1238         break;
1239     case TARGET_NR_execve:
1240         {
1241             char **argp, **envp;
1242             int argc, envc;
1243             uint32_t *p;
1244             char **q;
1245
1246             argc = 0;
1247             for (p = (void *)arg2; *p; p++)
1248                 argc++;
1249             envc = 0;
1250             for (p = (void *)arg3; *p; p++)
1251                 envc++;
1252
1253             argp = alloca((argc + 1) * sizeof(void *));
1254             envp = alloca((envc + 1) * sizeof(void *));
1255
1256             for (p = (void *)arg2, q = argp; *p; p++, q++)
1257                 *q = (void *)tswap32(*p);
1258             *q = NULL;
1259
1260             for (p = (void *)arg3, q = envp; *p; p++, q++)
1261                 *q = (void *)tswap32(*p);
1262             *q = NULL;
1263
1264             ret = get_errno(execve((const char *)arg1, argp, envp));
1265         }
1266         break;
1267     case TARGET_NR_chdir:
1268         ret = get_errno(chdir((const char *)arg1));
1269         break;
1270     case TARGET_NR_time:
1271         {
1272             int *time_ptr = (int *)arg1;
1273             ret = get_errno(time((time_t *)time_ptr));
1274             if (!is_error(ret) && time_ptr)
1275                 tswap32s(time_ptr);
1276         }
1277         break;
1278     case TARGET_NR_mknod:
1279         ret = get_errno(mknod((const char *)arg1, arg2, arg3));
1280         break;
1281     case TARGET_NR_chmod:
1282         ret = get_errno(chmod((const char *)arg1, arg2));
1283         break;
1284     case TARGET_NR_lchown:
1285         ret = get_errno(chown((const char *)arg1, arg2, arg3));
1286         break;
1287     case TARGET_NR_break:
1288         goto unimplemented;
1289     case TARGET_NR_oldstat:
1290         goto unimplemented;
1291     case TARGET_NR_lseek:
1292         ret = get_errno(lseek(arg1, arg2, arg3));
1293         break;
1294     case TARGET_NR_getpid:
1295         ret = get_errno(getpid());
1296         break;
1297     case TARGET_NR_mount:
1298         /* need to look at the data field */
1299         goto unimplemented;
1300     case TARGET_NR_umount:
1301         ret = get_errno(umount((const char *)arg1));
1302         break;
1303     case TARGET_NR_setuid:
1304         ret = get_errno(setuid(low2highuid(arg1)));
1305         break;
1306     case TARGET_NR_getuid:
1307         ret = get_errno(getuid());
1308         break;
1309     case TARGET_NR_stime:
1310         {
1311             int *time_ptr = (int *)arg1;
1312             if (time_ptr)
1313                 tswap32s(time_ptr);
1314             ret = get_errno(stime((time_t *)time_ptr));
1315         }
1316         break;
1317     case TARGET_NR_ptrace:
1318         goto unimplemented;
1319     case TARGET_NR_alarm:
1320         ret = alarm(arg1);
1321         break;
1322     case TARGET_NR_oldfstat:
1323         goto unimplemented;
1324     case TARGET_NR_pause:
1325         ret = get_errno(pause());
1326         break;
1327     case TARGET_NR_utime:
1328         goto unimplemented;
1329     case TARGET_NR_stty:
1330         goto unimplemented;
1331     case TARGET_NR_gtty:
1332         goto unimplemented;
1333     case TARGET_NR_access:
1334         ret = get_errno(access((const char *)arg1, arg2));
1335         break;
1336     case TARGET_NR_nice:
1337         ret = get_errno(nice(arg1));
1338         break;
1339     case TARGET_NR_ftime:
1340         goto unimplemented;
1341     case TARGET_NR_sync:
1342         sync();
1343         ret = 0;
1344         break;
1345     case TARGET_NR_kill:
1346         ret = get_errno(kill(arg1, arg2));
1347         break;
1348     case TARGET_NR_rename:
1349         ret = get_errno(rename((const char *)arg1, (const char *)arg2));
1350         break;
1351     case TARGET_NR_mkdir:
1352         ret = get_errno(mkdir((const char *)arg1, arg2));
1353         break;
1354     case TARGET_NR_rmdir:
1355         ret = get_errno(rmdir((const char *)arg1));
1356         break;
1357     case TARGET_NR_dup:
1358         ret = get_errno(dup(arg1));
1359         break;
1360     case TARGET_NR_pipe:
1361         {
1362             int *pipe_ptr = (int *)arg1;
1363             ret = get_errno(pipe(pipe_ptr));
1364             if (!is_error(ret)) {
1365                 tswap32s(&pipe_ptr[0]);
1366                 tswap32s(&pipe_ptr[1]);
1367             }
1368         }
1369         break;
1370     case TARGET_NR_times:
1371         {
1372             struct target_tms *tmsp = (void *)arg1;
1373             struct tms tms;
1374             ret = get_errno(times(&tms));
1375             if (tmsp) {
1376                 tmsp->tms_utime = tswapl(tms.tms_utime);
1377                 tmsp->tms_stime = tswapl(tms.tms_stime);
1378                 tmsp->tms_cutime = tswapl(tms.tms_cutime);
1379                 tmsp->tms_cstime = tswapl(tms.tms_cstime);
1380             }
1381         }
1382         break;
1383     case TARGET_NR_prof:
1384         goto unimplemented;
1385     case TARGET_NR_setgid:
1386         ret = get_errno(setgid(low2highgid(arg1)));
1387         break;
1388     case TARGET_NR_getgid:
1389         ret = get_errno(getgid());
1390         break;
1391     case TARGET_NR_signal:
1392         goto unimplemented;
1393     case TARGET_NR_geteuid:
1394         ret = get_errno(geteuid());
1395         break;
1396     case TARGET_NR_getegid:
1397         ret = get_errno(getegid());
1398         break;
1399     case TARGET_NR_acct:
1400         goto unimplemented;
1401     case TARGET_NR_umount2:
1402         ret = get_errno(umount2((const char *)arg1, arg2));
1403         break;
1404     case TARGET_NR_lock:
1405         goto unimplemented;
1406     case TARGET_NR_ioctl:
1407         ret = do_ioctl(arg1, arg2, arg3);
1408         break;
1409     case TARGET_NR_fcntl:
1410         switch(arg2) {
1411         case F_GETLK:
1412         case F_SETLK:
1413         case F_SETLKW:
1414             goto unimplemented;
1415         default:
1416             ret = get_errno(fcntl(arg1, arg2, arg3));
1417             break;
1418         }
1419         break;
1420     case TARGET_NR_mpx:
1421         goto unimplemented;
1422     case TARGET_NR_setpgid:
1423         ret = get_errno(setpgid(arg1, arg2));
1424         break;
1425     case TARGET_NR_ulimit:
1426         goto unimplemented;
1427     case TARGET_NR_oldolduname:
1428         goto unimplemented;
1429     case TARGET_NR_umask:
1430         ret = get_errno(umask(arg1));
1431         break;
1432     case TARGET_NR_chroot:
1433         ret = get_errno(chroot((const char *)arg1));
1434         break;
1435     case TARGET_NR_ustat:
1436         goto unimplemented;
1437     case TARGET_NR_dup2:
1438         ret = get_errno(dup2(arg1, arg2));
1439         break;
1440     case TARGET_NR_getppid:
1441         ret = get_errno(getppid());
1442         break;
1443     case TARGET_NR_getpgrp:
1444         ret = get_errno(getpgrp());
1445         break;
1446     case TARGET_NR_setsid:
1447         ret = get_errno(setsid());
1448         break;
1449     case TARGET_NR_sigaction:
1450         {
1451             struct target_old_sigaction *old_act = (void *)arg2;
1452             struct target_old_sigaction *old_oact = (void *)arg3;
1453             struct target_sigaction act, oact, *pact;
1454             if (old_act) {
1455                 act._sa_handler = old_act->_sa_handler;
1456                 target_siginitset(&act.sa_mask, old_act->sa_mask);
1457                 act.sa_flags = old_act->sa_flags;
1458                 act.sa_restorer = old_act->sa_restorer;
1459                 pact = &act;
1460             } else {
1461                 pact = NULL;
1462             }
1463             ret = get_errno(do_sigaction(arg1, pact, &oact));
1464             if (!is_error(ret) && old_oact) {
1465                 old_oact->_sa_handler = oact._sa_handler;
1466                 old_oact->sa_mask = oact.sa_mask.sig[0];
1467                 old_oact->sa_flags = oact.sa_flags;
1468                 old_oact->sa_restorer = oact.sa_restorer;
1469             }
1470         }
1471         break;
1472     case TARGET_NR_rt_sigaction:
1473         ret = get_errno(do_sigaction(arg1, (void *)arg2, (void *)arg3));
1474         break;
1475     case TARGET_NR_sgetmask:
1476         {
1477             sigset_t cur_set;
1478             target_ulong target_set;
1479             sigprocmask(0, NULL, &cur_set);
1480             host_to_target_old_sigset(&target_set, &cur_set);
1481             ret = target_set;
1482         }
1483         break;
1484     case TARGET_NR_ssetmask:
1485         {
1486             sigset_t set, oset, cur_set;
1487             target_ulong target_set = arg1;
1488             sigprocmask(0, NULL, &cur_set);
1489             target_to_host_old_sigset(&set, &target_set);
1490             sigorset(&set, &set, &cur_set);
1491             sigprocmask(SIG_SETMASK, &set, &oset);
1492             host_to_target_old_sigset(&target_set, &oset);
1493             ret = target_set;
1494         }
1495         break;
1496     case TARGET_NR_sigprocmask:
1497         {
1498             int how = arg1;
1499             sigset_t set, oldset, *set_ptr;
1500             target_ulong *pset = (void *)arg2, *poldset = (void *)arg3;
1501
1502             if (pset) {
1503                 switch(how) {
1504                 case TARGET_SIG_BLOCK:
1505                     how = SIG_BLOCK;
1506                     break;
1507                 case TARGET_SIG_UNBLOCK:
1508                     how = SIG_UNBLOCK;
1509                     break;
1510                 case TARGET_SIG_SETMASK:
1511                     how = SIG_SETMASK;
1512                     break;
1513                 default:
1514                     ret = -EINVAL;
1515                     goto fail;
1516                 }
1517                 target_to_host_old_sigset(&set, pset);
1518                 set_ptr = &set;
1519             } else {
1520                 how = 0;
1521                 set_ptr = NULL;
1522             }
1523             ret = get_errno(sigprocmask(arg1, set_ptr, &oldset));
1524             if (!is_error(ret) && poldset) {
1525                 host_to_target_old_sigset(poldset, &oldset);
1526             }
1527         }
1528         break;
1529     case TARGET_NR_rt_sigprocmask:
1530         {
1531             int how = arg1;
1532             sigset_t set, oldset, *set_ptr;
1533             target_sigset_t *pset = (void *)arg2;
1534             target_sigset_t *poldset = (void *)arg3;
1535
1536             if (pset) {
1537                 switch(how) {
1538                 case TARGET_SIG_BLOCK:
1539                     how = SIG_BLOCK;
1540                     break;
1541                 case TARGET_SIG_UNBLOCK:
1542                     how = SIG_UNBLOCK;
1543                     break;
1544                 case TARGET_SIG_SETMASK:
1545                     how = SIG_SETMASK;
1546                     break;
1547                 default:
1548                     ret = -EINVAL;
1549                     goto fail;
1550                 }
1551                 target_to_host_sigset(&set, pset);
1552                 set_ptr = &set;
1553             } else {
1554                 how = 0;
1555                 set_ptr = NULL;
1556             }
1557             ret = get_errno(sigprocmask(how, set_ptr, &oldset));
1558             if (!is_error(ret) && poldset) {
1559                 host_to_target_sigset(poldset, &oldset);
1560             }
1561         }
1562         break;
1563     case TARGET_NR_sigpending:
1564         {
1565             sigset_t set;
1566             ret = get_errno(sigpending(&set));
1567             if (!is_error(ret)) {
1568                 host_to_target_old_sigset((target_ulong *)arg1, &set);
1569             }
1570         }
1571         break;
1572     case TARGET_NR_rt_sigpending:
1573         {
1574             sigset_t set;
1575             ret = get_errno(sigpending(&set));
1576             if (!is_error(ret)) {
1577                 host_to_target_sigset((target_sigset_t *)arg1, &set);
1578             }
1579         }
1580         break;
1581     case TARGET_NR_sigsuspend:
1582         {
1583             sigset_t set;
1584             target_to_host_old_sigset(&set, (target_ulong *)arg1);
1585             ret = get_errno(sigsuspend(&set));
1586         }
1587         break;
1588     case TARGET_NR_rt_sigsuspend:
1589         {
1590             sigset_t set;
1591             target_to_host_sigset(&set, (target_sigset_t *)arg1);
1592             ret = get_errno(sigsuspend(&set));
1593         }
1594         break;
1595     case TARGET_NR_rt_sigtimedwait:
1596         {
1597             target_sigset_t *target_set = (void *)arg1;
1598             target_siginfo_t *target_uinfo = (void *)arg2;
1599             struct target_timespec *target_uts = (void *)arg3;
1600             sigset_t set;
1601             struct timespec uts, *puts;
1602             siginfo_t uinfo;
1603
1604             target_to_host_sigset(&set, target_set);
1605             if (target_uts) {
1606                 puts = &uts;
1607                 puts->tv_sec = tswapl(target_uts->tv_sec);
1608                 puts->tv_nsec = tswapl(target_uts->tv_nsec);
1609             } else {
1610                 puts = NULL;
1611             }
1612             ret = get_errno(sigtimedwait(&set, &uinfo, puts));
1613             if (!is_error(ret) && target_uinfo) {
1614                 host_to_target_siginfo(target_uinfo, &uinfo);
1615             }
1616         }
1617         break;
1618     case TARGET_NR_rt_sigqueueinfo:
1619         {
1620             siginfo_t uinfo;
1621             target_to_host_siginfo(&uinfo, (target_siginfo_t *)arg3);
1622             ret = get_errno(sys_rt_sigqueueinfo(arg1, arg2, &uinfo));
1623         }
1624         break;
1625     case TARGET_NR_sigreturn:
1626         /* NOTE: ret is eax, so not transcoding must be done */
1627         ret = do_sigreturn(cpu_env);
1628         break;
1629     case TARGET_NR_rt_sigreturn:
1630         /* NOTE: ret is eax, so not transcoding must be done */
1631         ret = do_rt_sigreturn(cpu_env);
1632         break;
1633     case TARGET_NR_setreuid:
1634         ret = get_errno(setreuid(arg1, arg2));
1635         break;
1636     case TARGET_NR_setregid:
1637         ret = get_errno(setregid(arg1, arg2));
1638         break;
1639     case TARGET_NR_sethostname:
1640         ret = get_errno(sethostname((const char *)arg1, arg2));
1641         break;
1642     case TARGET_NR_setrlimit:
1643         {
1644             /* XXX: convert resource ? */
1645             int resource = arg1;
1646             struct target_rlimit *target_rlim = (void *)arg2;
1647             struct rlimit rlim;
1648             rlim.rlim_cur = tswapl(target_rlim->rlim_cur);
1649             rlim.rlim_max = tswapl(target_rlim->rlim_max);
1650             ret = get_errno(setrlimit(resource, &rlim));
1651         }
1652         break;
1653     case TARGET_NR_getrlimit:
1654         {
1655             /* XXX: convert resource ? */
1656             int resource = arg1;
1657             struct target_rlimit *target_rlim = (void *)arg2;
1658             struct rlimit rlim;
1659
1660             ret = get_errno(getrlimit(resource, &rlim));
1661             if (!is_error(ret)) {
1662                 target_rlim->rlim_cur = tswapl(rlim.rlim_cur);
1663                 target_rlim->rlim_max = tswapl(rlim.rlim_max);
1664             }
1665         }
1666         break;
1667     case TARGET_NR_getrusage:
1668         goto unimplemented;
1669     case TARGET_NR_gettimeofday:
1670         {
1671             struct target_timeval *target_tv = (void *)arg1;
1672             struct timeval tv;
1673             ret = get_errno(gettimeofday(&tv, NULL));
1674             if (!is_error(ret)) {
1675                 host_to_target_timeval(target_tv, &tv);
1676             }
1677         }
1678         break;
1679     case TARGET_NR_settimeofday:
1680         {
1681             struct target_timeval *target_tv = (void *)arg1;
1682             struct timeval tv;
1683             target_to_host_timeval(&tv, target_tv);
1684             ret = get_errno(settimeofday(&tv, NULL));
1685         }
1686         break;
1687     case TARGET_NR_getgroups:
1688         goto unimplemented;
1689     case TARGET_NR_setgroups:
1690         goto unimplemented;
1691     case TARGET_NR_select:
1692         goto unimplemented;
1693     case TARGET_NR_symlink:
1694         ret = get_errno(symlink((const char *)arg1, (const char *)arg2));
1695         break;
1696     case TARGET_NR_oldlstat:
1697         goto unimplemented;
1698     case TARGET_NR_readlink:
1699         ret = get_errno(readlink((const char *)arg1, (char *)arg2, arg3));
1700         break;
1701     case TARGET_NR_uselib:
1702         goto unimplemented;
1703     case TARGET_NR_swapon:
1704         ret = get_errno(swapon((const char *)arg1, arg2));
1705         break;
1706     case TARGET_NR_reboot:
1707         goto unimplemented;
1708     case TARGET_NR_readdir:
1709         goto unimplemented;
1710 #ifdef TARGET_I386
1711     case TARGET_NR_mmap:
1712         {
1713             uint32_t v1, v2, v3, v4, v5, v6, *vptr;
1714             vptr = (uint32_t *)arg1;
1715             v1 = tswap32(vptr[0]);
1716             v2 = tswap32(vptr[1]);
1717             v3 = tswap32(vptr[2]);
1718             v4 = tswap32(vptr[3]);
1719             v5 = tswap32(vptr[4]);
1720             v6 = tswap32(vptr[5]);
1721             ret = get_errno((long)mmap((void *)v1, v2, v3, v4, v5, v6));
1722         }
1723         break;
1724 #endif
1725 #ifdef TARGET_I386
1726     case TARGET_NR_mmap2:
1727 #else
1728     case TARGET_NR_mmap:
1729 #endif
1730         ret = get_errno((long)mmap((void *)arg1, arg2, arg3, arg4, arg5, arg6));
1731         break;
1732     case TARGET_NR_munmap:
1733         ret = get_errno(munmap((void *)arg1, arg2));
1734         break;
1735     case TARGET_NR_mprotect:
1736         ret = get_errno(mprotect((void *)arg1, arg2, arg3));
1737         break;
1738     case TARGET_NR_mremap:
1739         ret = get_errno((long)mremap((void *)arg1, arg2, arg3, arg4));
1740         break;
1741     case TARGET_NR_msync:
1742         ret = get_errno(msync((void *)arg1, arg2, arg3));
1743         break;
1744     case TARGET_NR_mlock:
1745         ret = get_errno(mlock((void *)arg1, arg2));
1746         break;
1747     case TARGET_NR_munlock:
1748         ret = get_errno(munlock((void *)arg1, arg2));
1749         break;
1750     case TARGET_NR_mlockall:
1751         ret = get_errno(mlockall(arg1));
1752         break;
1753     case TARGET_NR_munlockall:
1754         ret = get_errno(munlockall());
1755         break;
1756     case TARGET_NR_truncate:
1757         ret = get_errno(truncate((const char *)arg1, arg2));
1758         break;
1759     case TARGET_NR_ftruncate:
1760         ret = get_errno(ftruncate(arg1, arg2));
1761         break;
1762     case TARGET_NR_fchmod:
1763         ret = get_errno(fchmod(arg1, arg2));
1764         break;
1765     case TARGET_NR_fchown:
1766         ret = get_errno(fchown(arg1, arg2, arg3));
1767         break;
1768     case TARGET_NR_getpriority:
1769         ret = get_errno(getpriority(arg1, arg2));
1770         break;
1771     case TARGET_NR_setpriority:
1772         ret = get_errno(setpriority(arg1, arg2, arg3));
1773         break;
1774     case TARGET_NR_profil:
1775         goto unimplemented;
1776     case TARGET_NR_statfs:
1777         stfs = (void *)arg2;
1778         ret = get_errno(sys_statfs((const char *)arg1, stfs));
1779     convert_statfs:
1780         if (!is_error(ret)) {
1781             tswap32s(&stfs->f_type);
1782             tswap32s(&stfs->f_bsize);
1783             tswap32s(&stfs->f_blocks);
1784             tswap32s(&stfs->f_bfree);
1785             tswap32s(&stfs->f_bavail);
1786             tswap32s(&stfs->f_files);
1787             tswap32s(&stfs->f_ffree);
1788             tswap32s(&stfs->f_fsid.val[0]);
1789             tswap32s(&stfs->f_fsid.val[1]);
1790             tswap32s(&stfs->f_namelen);
1791         }
1792         break;
1793     case TARGET_NR_fstatfs:
1794         stfs = (void *)arg2;
1795         ret = get_errno(sys_fstatfs(arg1, stfs));
1796         goto convert_statfs;
1797     case TARGET_NR_ioperm:
1798         goto unimplemented;
1799     case TARGET_NR_socketcall:
1800         ret = do_socketcall(arg1, (int32_t *)arg2);
1801         break;
1802     case TARGET_NR_syslog:
1803         goto unimplemented;
1804     case TARGET_NR_setitimer:
1805         {
1806             struct target_itimerval *target_value = (void *)arg2;
1807             struct target_itimerval *target_ovalue = (void *)arg3;
1808             struct itimerval value, ovalue, *pvalue;
1809
1810             if (target_value) {
1811                 pvalue = &value;
1812                 target_to_host_timeval(&pvalue->it_interval,
1813                                        &target_value->it_interval);
1814                 target_to_host_timeval(&pvalue->it_value,
1815                                        &target_value->it_value);
1816             } else {
1817                 pvalue = NULL;
1818             }
1819             ret = get_errno(setitimer(arg1, pvalue, &ovalue));
1820             if (!is_error(ret) && target_ovalue) {
1821                 host_to_target_timeval(&target_ovalue->it_interval,
1822                                        &ovalue.it_interval);
1823                 host_to_target_timeval(&target_ovalue->it_value,
1824                                        &ovalue.it_value);
1825             }
1826         }
1827         break;
1828     case TARGET_NR_getitimer:
1829         {
1830             struct target_itimerval *target_value = (void *)arg2;
1831             struct itimerval value;
1832
1833             ret = get_errno(getitimer(arg1, &value));
1834             if (!is_error(ret) && target_value) {
1835                 host_to_target_timeval(&target_value->it_interval,
1836                                        &value.it_interval);
1837                 host_to_target_timeval(&target_value->it_value,
1838                                        &value.it_value);
1839             }
1840         }
1841         break;
1842     case TARGET_NR_stat:
1843         ret = get_errno(stat((const char *)arg1, &st));
1844         goto do_stat;
1845     case TARGET_NR_lstat:
1846         ret = get_errno(lstat((const char *)arg1, &st));
1847         goto do_stat;
1848     case TARGET_NR_fstat:
1849         {
1850             ret = get_errno(fstat(arg1, &st));
1851         do_stat:
1852             if (!is_error(ret)) {
1853                 struct target_stat *target_st = (void *)arg2;
1854                 target_st->st_dev = tswap16(st.st_dev);
1855                 target_st->st_ino = tswapl(st.st_ino);
1856                 target_st->st_mode = tswap16(st.st_mode);
1857                 target_st->st_nlink = tswap16(st.st_nlink);
1858                 target_st->st_uid = tswap16(st.st_uid);
1859                 target_st->st_gid = tswap16(st.st_gid);
1860                 target_st->st_rdev = tswap16(st.st_rdev);
1861                 target_st->st_size = tswapl(st.st_size);
1862                 target_st->st_blksize = tswapl(st.st_blksize);
1863                 target_st->st_blocks = tswapl(st.st_blocks);
1864                 target_st->target_st_atime = tswapl(st.st_atime);
1865                 target_st->target_st_mtime = tswapl(st.st_mtime);
1866                 target_st->target_st_ctime = tswapl(st.st_ctime);
1867             }
1868         }
1869         break;
1870     case TARGET_NR_olduname:
1871         goto unimplemented;
1872     case TARGET_NR_iopl:
1873         goto unimplemented;
1874     case TARGET_NR_vhangup:
1875         ret = get_errno(vhangup());
1876         break;
1877     case TARGET_NR_idle:
1878         goto unimplemented;
1879     case TARGET_NR_wait4:
1880         {
1881             int status;
1882             target_long *status_ptr = (void *)arg2;
1883             struct rusage rusage, *rusage_ptr;
1884             struct target_rusage *target_rusage = (void *)arg4;
1885             if (target_rusage)
1886                 rusage_ptr = &rusage;
1887             else
1888                 rusage_ptr = NULL;
1889             ret = get_errno(wait4(arg1, &status, arg3, rusage_ptr));
1890             if (!is_error(ret)) {
1891                 if (status_ptr)
1892                     *status_ptr = tswap32(status);
1893                 if (target_rusage) {
1894                     target_rusage->ru_utime.tv_sec = tswapl(rusage.ru_utime.tv_sec);
1895                     target_rusage->ru_utime.tv_usec = tswapl(rusage.ru_utime.tv_usec);
1896                     target_rusage->ru_stime.tv_sec = tswapl(rusage.ru_stime.tv_sec);
1897                     target_rusage->ru_stime.tv_usec = tswapl(rusage.ru_stime.tv_usec);
1898                     target_rusage->ru_maxrss = tswapl(rusage.ru_maxrss);
1899                     target_rusage->ru_ixrss = tswapl(rusage.ru_ixrss);
1900                     target_rusage->ru_idrss = tswapl(rusage.ru_idrss);
1901                     target_rusage->ru_isrss = tswapl(rusage.ru_isrss);
1902                     target_rusage->ru_minflt = tswapl(rusage.ru_minflt);
1903                     target_rusage->ru_majflt = tswapl(rusage.ru_majflt);
1904                     target_rusage->ru_nswap = tswapl(rusage.ru_nswap);
1905                     target_rusage->ru_inblock = tswapl(rusage.ru_inblock);
1906                     target_rusage->ru_oublock = tswapl(rusage.ru_oublock);
1907                     target_rusage->ru_msgsnd = tswapl(rusage.ru_msgsnd);
1908                     target_rusage->ru_msgrcv = tswapl(rusage.ru_msgrcv);
1909                     target_rusage->ru_nsignals = tswapl(rusage.ru_nsignals);
1910                     target_rusage->ru_nvcsw = tswapl(rusage.ru_nvcsw);
1911                     target_rusage->ru_nivcsw = tswapl(rusage.ru_nivcsw);
1912                 }
1913             }
1914         }
1915         break;
1916     case TARGET_NR_swapoff:
1917         ret = get_errno(swapoff((const char *)arg1));
1918         break;
1919     case TARGET_NR_sysinfo:
1920         goto unimplemented;
1921     case TARGET_NR_ipc:
1922         goto unimplemented;
1923     case TARGET_NR_fsync:
1924         ret = get_errno(fsync(arg1));
1925         break;
1926     case TARGET_NR_clone:
1927         ret = get_errno(do_fork(cpu_env, arg1, arg2));
1928         break;
1929     case TARGET_NR_setdomainname:
1930         ret = get_errno(setdomainname((const char *)arg1, arg2));
1931         break;
1932     case TARGET_NR_uname:
1933         /* no need to transcode because we use the linux syscall */
1934         ret = get_errno(sys_uname((struct new_utsname *)arg1));
1935         break;
1936 #ifdef TARGET_I386
1937     case TARGET_NR_modify_ldt:
1938         ret = get_errno(do_modify_ldt(cpu_env, arg1, (void *)arg2, arg3));
1939         break;
1940     case TARGET_NR_vm86old:
1941         goto unimplemented;
1942     case TARGET_NR_vm86:
1943         ret = do_vm86(cpu_env, arg1, (void *)arg2);
1944         break;
1945 #endif
1946     case TARGET_NR_adjtimex:
1947         goto unimplemented;
1948     case TARGET_NR_create_module:
1949     case TARGET_NR_init_module:
1950     case TARGET_NR_delete_module:
1951     case TARGET_NR_get_kernel_syms:
1952         goto unimplemented;
1953     case TARGET_NR_quotactl:
1954         goto unimplemented;
1955     case TARGET_NR_getpgid:
1956         ret = get_errno(getpgid(arg1));
1957         break;
1958     case TARGET_NR_fchdir:
1959         ret = get_errno(fchdir(arg1));
1960         break;
1961     case TARGET_NR_bdflush:
1962         goto unimplemented;
1963     case TARGET_NR_sysfs:
1964         goto unimplemented;
1965     case TARGET_NR_personality:
1966         ret = get_errno(personality(arg1));
1967         break;
1968     case TARGET_NR_afs_syscall:
1969         goto unimplemented;
1970     case TARGET_NR_setfsuid:
1971         ret = get_errno(setfsuid(arg1));
1972         break;
1973     case TARGET_NR_setfsgid:
1974         ret = get_errno(setfsgid(arg1));
1975         break;
1976     case TARGET_NR__llseek:
1977         {
1978             int64_t res;
1979             ret = get_errno(_llseek(arg1, arg2, arg3, &res, arg5));
1980             *(int64_t *)arg4 = tswap64(res);
1981         }
1982         break;
1983     case TARGET_NR_getdents:
1984 #if TARGET_LONG_SIZE != 4
1985 #error not supported
1986 #endif
1987         {
1988             struct dirent *dirp = (void *)arg2;
1989             long count = arg3;
1990
1991             ret = get_errno(sys_getdents(arg1, dirp, count));
1992             if (!is_error(ret)) {
1993                 struct dirent *de;
1994                 int len = ret;
1995                 int reclen;
1996                 de = dirp;
1997                 while (len > 0) {
1998                     reclen = de->d_reclen;
1999                     if (reclen > len)
2000                         break;
2001                     de->d_reclen = tswap16(reclen);
2002                     tswapls(&de->d_ino);
2003                     tswapls(&de->d_off);
2004                     de = (struct dirent *)((char *)de + reclen);
2005                     len -= reclen;
2006                 }
2007             }
2008         }
2009         break;
2010     case TARGET_NR_getdents64:
2011         {
2012             struct dirent64 *dirp = (void *)arg2;
2013             long count = arg3;
2014             ret = get_errno(sys_getdents64(arg1, dirp, count));
2015             if (!is_error(ret)) {
2016                 struct dirent64 *de;
2017                 int len = ret;
2018                 int reclen;
2019                 de = dirp;
2020                 while (len > 0) {
2021                     reclen = de->d_reclen;
2022                     if (reclen > len)
2023                         break;
2024                     de->d_reclen = tswap16(reclen);
2025                     tswap64s(&de->d_ino);
2026                     tswap64s(&de->d_off);
2027                     de = (struct dirent64 *)((char *)de + reclen);
2028                     len -= reclen;
2029                 }
2030             }
2031         }
2032         break;
2033     case TARGET_NR__newselect:
2034         ret = do_select(arg1, (void *)arg2, (void *)arg3, (void *)arg4,
2035                         (void *)arg5);
2036         break;
2037     case TARGET_NR_poll:
2038         {
2039             struct target_pollfd *target_pfd = (void *)arg1;
2040             unsigned int nfds = arg2;
2041             int timeout = arg3;
2042             struct pollfd *pfd;
2043             unsigned int i;
2044
2045             pfd = alloca(sizeof(struct pollfd) * nfds);
2046             for(i = 0; i < nfds; i++) {
2047                 pfd[i].fd = tswap32(target_pfd[i].fd);
2048                 pfd[i].events = tswap16(target_pfd[i].events);
2049             }
2050             ret = get_errno(poll(pfd, nfds, timeout));
2051             if (!is_error(ret)) {
2052                 for(i = 0; i < nfds; i++) {
2053                     target_pfd[i].revents = tswap16(pfd[i].revents);
2054                 }
2055             }
2056         }
2057         break;
2058     case TARGET_NR_flock:
2059         /* NOTE: the flock constant seems to be the same for every
2060            Linux platform */
2061         ret = get_errno(flock(arg1, arg2));
2062         break;
2063     case TARGET_NR_readv:
2064         {
2065             int count = arg3;
2066             int i;
2067             struct iovec *vec;
2068             struct target_iovec *target_vec = (void *)arg2;
2069
2070             vec = alloca(count * sizeof(struct iovec));
2071             for(i = 0;i < count; i++) {
2072                 vec[i].iov_base = (void *)tswapl(target_vec[i].iov_base);
2073                 vec[i].iov_len = tswapl(target_vec[i].iov_len);
2074             }
2075             ret = get_errno(readv(arg1, vec, count));
2076         }
2077         break;
2078     case TARGET_NR_writev:
2079         {
2080             int count = arg3;
2081             int i;
2082             struct iovec *vec;
2083             struct target_iovec *target_vec = (void *)arg2;
2084
2085             vec = alloca(count * sizeof(struct iovec));
2086             for(i = 0;i < count; i++) {
2087                 vec[i].iov_base = (void *)tswapl(target_vec[i].iov_base);
2088                 vec[i].iov_len = tswapl(target_vec[i].iov_len);
2089             }
2090             ret = get_errno(writev(arg1, vec, count));
2091         }
2092         break;
2093     case TARGET_NR_getsid:
2094         ret = get_errno(getsid(arg1));
2095         break;
2096     case TARGET_NR_fdatasync:
2097         ret = get_errno(fdatasync(arg1));
2098         break;
2099     case TARGET_NR__sysctl:
2100         goto unimplemented;
2101     case TARGET_NR_sched_setparam:
2102         {
2103             struct sched_param *target_schp = (void *)arg2;
2104             struct sched_param schp;
2105             schp.sched_priority = tswap32(target_schp->sched_priority);
2106             ret = get_errno(sched_setparam(arg1, &schp));
2107         }
2108         break;
2109     case TARGET_NR_sched_getparam:
2110         {
2111             struct sched_param *target_schp = (void *)arg2;
2112             struct sched_param schp;
2113             ret = get_errno(sched_getparam(arg1, &schp));
2114             if (!is_error(ret)) {
2115                 target_schp->sched_priority = tswap32(schp.sched_priority);
2116             }
2117         }
2118         break;
2119     case TARGET_NR_sched_setscheduler:
2120         {
2121             struct sched_param *target_schp = (void *)arg3;
2122             struct sched_param schp;
2123             schp.sched_priority = tswap32(target_schp->sched_priority);
2124             ret = get_errno(sched_setscheduler(arg1, arg2, &schp));
2125         }
2126         break;
2127     case TARGET_NR_sched_getscheduler:
2128         ret = get_errno(sched_getscheduler(arg1));
2129         break;
2130     case TARGET_NR_sched_yield:
2131         ret = get_errno(sched_yield());
2132         break;
2133     case TARGET_NR_sched_get_priority_max:
2134         ret = get_errno(sched_get_priority_max(arg1));
2135         break;
2136     case TARGET_NR_sched_get_priority_min:
2137         ret = get_errno(sched_get_priority_min(arg1));
2138         break;
2139     case TARGET_NR_sched_rr_get_interval:
2140         {
2141             struct target_timespec *target_ts = (void *)arg2;
2142             struct timespec ts;
2143             ret = get_errno(sched_rr_get_interval(arg1, &ts));
2144             if (!is_error(ret)) {
2145                 target_ts->tv_sec = tswapl(ts.tv_sec);
2146                 target_ts->tv_nsec = tswapl(ts.tv_nsec);
2147             }
2148         }
2149         break;
2150     case TARGET_NR_nanosleep:
2151         {
2152             struct target_timespec *target_req = (void *)arg1;
2153             struct target_timespec *target_rem = (void *)arg2;
2154             struct timespec req, rem;
2155             req.tv_sec = tswapl(target_req->tv_sec);
2156             req.tv_nsec = tswapl(target_req->tv_nsec);
2157             ret = get_errno(nanosleep(&req, &rem));
2158             if (target_rem) {
2159                 target_rem->tv_sec = tswapl(rem.tv_sec);
2160                 target_rem->tv_nsec = tswapl(rem.tv_nsec);
2161             }
2162         }
2163         break;
2164     case TARGET_NR_setresuid:
2165         ret = get_errno(setresuid(low2highuid(arg1),
2166                                   low2highuid(arg2),
2167                                   low2highuid(arg3)));
2168         break;
2169     case TARGET_NR_getresuid:
2170         {
2171             int ruid, euid, suid;
2172             ret = get_errno(getresuid(&ruid, &euid, &suid));
2173             if (!is_error(ret)) {
2174                 *(uint16_t *)arg1 = tswap16(high2lowuid(ruid));
2175                 *(uint16_t *)arg2 = tswap16(high2lowuid(euid));
2176                 *(uint16_t *)arg3 = tswap16(high2lowuid(suid));
2177             }
2178         }
2179         break;
2180     case TARGET_NR_setresgid:
2181         ret = get_errno(setresgid(low2highgid(arg1),
2182                                   low2highgid(arg2),
2183                                   low2highgid(arg3)));
2184         break;
2185     case TARGET_NR_getresgid:
2186         {
2187             int rgid, egid, sgid;
2188             ret = get_errno(getresgid(&rgid, &egid, &sgid));
2189             if (!is_error(ret)) {
2190                 *(uint16_t *)arg1 = high2lowgid(tswap16(rgid));
2191                 *(uint16_t *)arg2 = high2lowgid(tswap16(egid));
2192                 *(uint16_t *)arg3 = high2lowgid(tswap16(sgid));
2193             }
2194         }
2195         break;
2196     case TARGET_NR_query_module:
2197         goto unimplemented;
2198     case TARGET_NR_nfsservctl:
2199         goto unimplemented;
2200     case TARGET_NR_prctl:
2201         goto unimplemented;
2202     case TARGET_NR_pread:
2203         goto unimplemented;
2204     case TARGET_NR_pwrite:
2205         goto unimplemented;
2206     case TARGET_NR_chown:
2207         ret = get_errno(chown((const char *)arg1, arg2, arg3));
2208         break;
2209     case TARGET_NR_getcwd:
2210         ret = get_errno(sys_getcwd1((char *)arg1, arg2));
2211         break;
2212     case TARGET_NR_capget:
2213         goto unimplemented;
2214     case TARGET_NR_capset:
2215         goto unimplemented;
2216     case TARGET_NR_sigaltstack:
2217         goto unimplemented;
2218     case TARGET_NR_sendfile:
2219         goto unimplemented;
2220     case TARGET_NR_getpmsg:
2221         goto unimplemented;
2222     case TARGET_NR_putpmsg:
2223         goto unimplemented;
2224     case TARGET_NR_vfork:
2225         ret = get_errno(do_fork(cpu_env, CLONE_VFORK | CLONE_VM | SIGCHLD, 0));
2226         break;
2227     case TARGET_NR_ugetrlimit:
2228         goto unimplemented;
2229     case TARGET_NR_truncate64:
2230         goto unimplemented;
2231     case TARGET_NR_ftruncate64:
2232         goto unimplemented;
2233     case TARGET_NR_stat64:
2234         ret = get_errno(stat((const char *)arg1, &st));
2235         goto do_stat64;
2236     case TARGET_NR_lstat64:
2237         ret = get_errno(lstat((const char *)arg1, &st));
2238         goto do_stat64;
2239     case TARGET_NR_fstat64:
2240         {
2241             ret = get_errno(fstat(arg1, &st));
2242         do_stat64:
2243             if (!is_error(ret)) {
2244                 struct target_stat64 *target_st = (void *)arg2;
2245                 target_st->st_dev = tswap16(st.st_dev);
2246                 target_st->st_ino = tswapl(st.st_ino);
2247                 target_st->st_mode = tswap16(st.st_mode);
2248                 target_st->st_nlink = tswap16(st.st_nlink);
2249                 target_st->st_uid = tswap16(st.st_uid);
2250                 target_st->st_gid = tswap16(st.st_gid);
2251                 target_st->st_rdev = tswap16(st.st_rdev);
2252                 /* XXX: better use of kernel struct */
2253                 target_st->st_size = tswapl(st.st_size);
2254                 target_st->st_blksize = tswapl(st.st_blksize);
2255                 target_st->st_blocks = tswapl(st.st_blocks);
2256                 target_st->target_st_atime = tswapl(st.st_atime);
2257                 target_st->target_st_mtime = tswapl(st.st_mtime);
2258                 target_st->target_st_ctime = tswapl(st.st_ctime);
2259             }
2260         }
2261         break;
2262
2263     case TARGET_NR_lchown32:
2264         ret = get_errno(lchown((const char *)arg1, arg2, arg3));
2265         break;
2266     case TARGET_NR_getuid32:
2267         ret = get_errno(getuid());
2268         break;
2269     case TARGET_NR_getgid32:
2270         ret = get_errno(getgid());
2271         break;
2272     case TARGET_NR_geteuid32:
2273         ret = get_errno(geteuid());
2274         break;
2275     case TARGET_NR_getegid32:
2276         ret = get_errno(getegid());
2277         break;
2278     case TARGET_NR_setreuid32:
2279         ret = get_errno(setreuid(arg1, arg2));
2280         break;
2281     case TARGET_NR_setregid32:
2282         ret = get_errno(setregid(arg1, arg2));
2283         break;
2284     case TARGET_NR_getgroups32:
2285         goto unimplemented;
2286     case TARGET_NR_setgroups32:
2287         goto unimplemented;
2288     case TARGET_NR_fchown32:
2289         ret = get_errno(fchown(arg1, arg2, arg3));
2290         break;
2291     case TARGET_NR_setresuid32:
2292         ret = get_errno(setresuid(arg1, arg2, arg3));
2293         break;
2294     case TARGET_NR_getresuid32:
2295         {
2296             int ruid, euid, suid;
2297             ret = get_errno(getresuid(&ruid, &euid, &suid));
2298             if (!is_error(ret)) {
2299                 *(uint32_t *)arg1 = tswap32(ruid);
2300                 *(uint32_t *)arg2 = tswap32(euid);
2301                 *(uint32_t *)arg3 = tswap32(suid);
2302             }
2303         }
2304         break;
2305     case TARGET_NR_setresgid32:
2306         ret = get_errno(setresgid(arg1, arg2, arg3));
2307         break;
2308     case TARGET_NR_getresgid32:
2309         {
2310             int rgid, egid, sgid;
2311             ret = get_errno(getresgid(&rgid, &egid, &sgid));
2312             if (!is_error(ret)) {
2313                 *(uint32_t *)arg1 = tswap32(rgid);
2314                 *(uint32_t *)arg2 = tswap32(egid);
2315                 *(uint32_t *)arg3 = tswap32(sgid);
2316             }
2317         }
2318         break;
2319     case TARGET_NR_chown32:
2320         ret = get_errno(chown((const char *)arg1, arg2, arg3));
2321         break;
2322     case TARGET_NR_setuid32:
2323         ret = get_errno(setuid(arg1));
2324         break;
2325     case TARGET_NR_setgid32:
2326         ret = get_errno(setgid(arg1));
2327         break;
2328     case TARGET_NR_setfsuid32:
2329         ret = get_errno(setfsuid(arg1));
2330         break;
2331     case TARGET_NR_setfsgid32:
2332         ret = get_errno(setfsgid(arg1));
2333         break;
2334     case TARGET_NR_pivot_root:
2335         goto unimplemented;
2336     case TARGET_NR_mincore:
2337         goto unimplemented;
2338     case TARGET_NR_madvise:
2339         goto unimplemented;
2340 #if TARGET_LONG_BITS == 32
2341     case TARGET_NR_fcntl64:
2342         switch(arg2) {
2343         case F_GETLK64:
2344         case F_SETLK64:
2345         case F_SETLKW64:
2346             goto unimplemented;
2347         default:
2348             ret = get_errno(fcntl(arg1, arg2, arg3));
2349             break;
2350         }
2351         break;
2352 #endif
2353     case TARGET_NR_security:
2354         goto unimplemented;
2355     case TARGET_NR_gettid:
2356         ret = get_errno(gettid());
2357         break;
2358     case TARGET_NR_readahead:
2359         goto unimplemented;
2360     case TARGET_NR_setxattr:
2361     case TARGET_NR_lsetxattr:
2362     case TARGET_NR_fsetxattr:
2363     case TARGET_NR_getxattr:
2364     case TARGET_NR_lgetxattr:
2365     case TARGET_NR_fgetxattr:
2366     case TARGET_NR_listxattr:
2367     case TARGET_NR_llistxattr:
2368     case TARGET_NR_flistxattr:
2369     case TARGET_NR_removexattr:
2370     case TARGET_NR_lremovexattr:
2371     case TARGET_NR_fremovexattr:
2372         goto unimplemented_nowarn;
2373     case TARGET_NR_set_thread_area:
2374     case TARGET_NR_get_thread_area:
2375         goto unimplemented_nowarn;
2376     default:
2377     unimplemented:
2378         gemu_log("qemu: Unsupported syscall: %d\n", num);
2379     unimplemented_nowarn:
2380         ret = -ENOSYS;
2381         break;
2382     }
2383  fail:
2384     return ret;
2385 }
2386