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 <utime.h>
  45 //#include <sys/user.h>
  46 #include <netinet/tcp.h>
  47
  48 #define termios host_termios
  49 #define winsize host_winsize
  50 #define termio host_termio
  51 #define sgttyb host_sgttyb /* same as target */
  52 #define tchars host_tchars /* same as target */
  53 #define ltchars host_ltchars /* same as target */
  54
  55 #include <linux/termios.h>
  56 #include <linux/unistd.h>
  57 #include <linux/utsname.h>
  58 #include <linux/cdrom.h>
  59 #include <linux/hdreg.h>
  60 #include <linux/soundcard.h>
  61 #include <linux/dirent.h>
  62 #include <linux/kd.h>
  63
  64 #include "qemu.h"
  65
  66 //#define DEBUG
  67
  68 #if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SPARC)
  69 /* 16 bit uid wrappers emulation */
  70 #define USE_UID16
  71 #endif
  72
  73 //#include <linux/msdos_fs.h>
  74 #define VFAT_IOCTL_READDIR_BOTH         _IOR('r', 1, struct dirent [2])
  75 #define VFAT_IOCTL_READDIR_SHORT        _IOR('r', 2, struct dirent [2])
  76
  77
  78 #if defined(__powerpc__)
  79 #undef __syscall_nr
  80 #undef __sc_loadargs_0
  81 #undef __sc_loadargs_1
  82 #undef __sc_loadargs_2
  83 #undef __sc_loadargs_3
  84 #undef __sc_loadargs_4
  85 #undef __sc_loadargs_5
  86 #undef __sc_asm_input_0
  87 #undef __sc_asm_input_1
  88 #undef __sc_asm_input_2
  89 #undef __sc_asm_input_3
  90 #undef __sc_asm_input_4
  91 #undef __sc_asm_input_5
  92 #undef _syscall0
  93 #undef _syscall1
  94 #undef _syscall2
  95 #undef _syscall3
  96 #undef _syscall4
  97 #undef _syscall5
  98
  99 /* need to redefine syscalls as Linux kernel defines are incorrect for
 100    the clobber list */
 101 /* On powerpc a system call basically clobbers the same registers like a
 102  * function call, with the exception of LR (which is needed for the
 103  * "sc; bnslr" sequence) and CR (where only CR0.SO is clobbered to signal
 104  * an error return status).
 105  */
 106
 107 #define __syscall_nr(nr, type, name, args...)                           \
 108         unsigned long __sc_ret, __sc_err;                               \
 109         {                                                               \
 110                 register unsigned long __sc_0  __asm__ ("r0");          \
 111                 register unsigned long __sc_3  __asm__ ("r3");          \
 112                 register unsigned long __sc_4  __asm__ ("r4");          \
 113                 register unsigned long __sc_5  __asm__ ("r5");          \
 114                 register unsigned long __sc_6  __asm__ ("r6");          \
 115                 register unsigned long __sc_7  __asm__ ("r7");          \
 116                                                                         \
 117                 __sc_loadargs_##nr(name, args);                         \
 118                 __asm__ __volatile__                                    \
 119                         ("sc           \n\t"                            \
 120                          "mfcr %0      "                                \
 121                         : "=&r" (__sc_0),                               \
 122                           "=&r" (__sc_3),  "=&r" (__sc_4),              \
 123                           "=&r" (__sc_5),  "=&r" (__sc_6),              \
 124                           "=&r" (__sc_7)                                \
 125                         : __sc_asm_input_##nr                           \
 126                         : "cr0", "ctr", "memory",                       \
 127                           "r8", "r9", "r10","r11", "r12");              \
 128                 __sc_ret = __sc_3;                                      \
 129                 __sc_err = __sc_0;                                      \
 130         }                                                               \
 131         if (__sc_err & 0x10000000)                                      \
 132         {                                                               \
 133                 errno = __sc_ret;                                       \
 134                 __sc_ret = -1;                                          \
 135         }                                                               \
 136         return (type) __sc_ret
 137
 138 #define __sc_loadargs_0(name, dummy...)                                 \
 139         __sc_0 = __NR_##name
 140 #define __sc_loadargs_1(name, arg1)                                     \
 141         __sc_loadargs_0(name);                                          \
 142         __sc_3 = (unsigned long) (arg1)
 143 #define __sc_loadargs_2(name, arg1, arg2)                               \
 144         __sc_loadargs_1(name, arg1);                                    \
 145         __sc_4 = (unsigned long) (arg2)
 146 #define __sc_loadargs_3(name, arg1, arg2, arg3)                         \
 147         __sc_loadargs_2(name, arg1, arg2);                              \
 148         __sc_5 = (unsigned long) (arg3)
 149 #define __sc_loadargs_4(name, arg1, arg2, arg3, arg4)                   \
 150         __sc_loadargs_3(name, arg1, arg2, arg3);                        \
 151         __sc_6 = (unsigned long) (arg4)
 152 #define __sc_loadargs_5(name, arg1, arg2, arg3, arg4, arg5)             \
 153         __sc_loadargs_4(name, arg1, arg2, arg3, arg4);                  \
 154         __sc_7 = (unsigned long) (arg5)
 155
 156 #define __sc_asm_input_0 "0" (__sc_0)
 157 #define __sc_asm_input_1 __sc_asm_input_0, "1" (__sc_3)
 158 #define __sc_asm_input_2 __sc_asm_input_1, "2" (__sc_4)
 159 #define __sc_asm_input_3 __sc_asm_input_2, "3" (__sc_5)
 160 #define __sc_asm_input_4 __sc_asm_input_3, "4" (__sc_6)
 161 #define __sc_asm_input_5 __sc_asm_input_4, "5" (__sc_7)
 162
 163 #define _syscall0(type,name)                                            \
 164 type name(void)                                                         \
 165 {                                                                       \
 166         __syscall_nr(0, type, name);                                    \
 167 }
 168
 169 #define _syscall1(type,name,type1,arg1)                                 \
 170 type name(type1 arg1)                                                   \
 171 {                                                                       \
 172         __syscall_nr(1, type, name, arg1);                              \
 173 }
 174
 175 #define _syscall2(type,name,type1,arg1,type2,arg2)                      \
 176 type name(type1 arg1, type2 arg2)                                       \
 177 {                                                                       \
 178         __syscall_nr(2, type, name, arg1, arg2);                        \
 179 }
 180
 181 #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)           \
 182 type name(type1 arg1, type2 arg2, type3 arg3)                           \
 183 {                                                                       \
 184         __syscall_nr(3, type, name, arg1, arg2, arg3);                  \
 185 }
 186
 187 #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
 188 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4)               \
 189 {                                                                       \
 190         __syscall_nr(4, type, name, arg1, arg2, arg3, arg4);            \
 191 }
 192
 193 #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
 194 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)   \
 195 {                                                                       \
 196         __syscall_nr(5, type, name, arg1, arg2, arg3, arg4, arg5);      \
 197 }
 198 #endif
 199
 200 #define __NR_sys_uname __NR_uname
 201 #define __NR_sys_getcwd1 __NR_getcwd
 202 #define __NR_sys_statfs __NR_statfs
 203 #define __NR_sys_fstatfs __NR_fstatfs
 204 #define __NR_sys_getdents __NR_getdents
 205 #define __NR_sys_getdents64 __NR_getdents64
 206 #define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
 207
 208 #if defined(__alpha__) || defined (__ia64__)
 209 #define __NR__llseek __NR_lseek
 210 #endif
 211
 212 #ifdef __NR_gettid
 213 _syscall0(int, gettid)
 214 #else
 215 static int gettid(void) {
 216     return -ENOSYS;
 217 }
 218 #endif
 219 _syscall1(int,sys_uname,struct new_utsname *,buf)
 220 _syscall2(int,sys_getcwd1,char *,buf,size_t,size)
 221 _syscall3(int, sys_getdents, uint, fd, struct dirent *, dirp, uint, count);
 222 _syscall3(int, sys_getdents64, uint, fd, struct dirent64 *, dirp, uint, count);
 223 _syscall5(int, _llseek,  uint,  fd, ulong, hi, ulong, lo,
 224           loff_t *, res, uint, wh);
 225 _syscall2(int,sys_statfs,const char *,path,struct kernel_statfs *,buf)
 226 _syscall2(int,sys_fstatfs,int,fd,struct kernel_statfs *,buf)
 227 _syscall3(int,sys_rt_sigqueueinfo,int,pid,int,sig,siginfo_t *,uinfo)
 228 #ifdef __NR_exit_group
 229 _syscall1(int,exit_group,int,error_code)
 230 #endif
 231
 232 extern int personality(int);
 233 extern int flock(int, int);
 234 extern int setfsuid(int);
 235 extern int setfsgid(int);
 236 extern int setresuid(uid_t, uid_t, uid_t);
 237 extern int getresuid(uid_t *, uid_t *, uid_t *);
 238 extern int setresgid(gid_t, gid_t, gid_t);
 239 extern int getresgid(gid_t *, gid_t *, gid_t *);
 240 extern int setgroups(int, gid_t *);
 241
 242 #define put_user(x,ptr)\
 243 ({\
 244     int size = sizeof(*ptr);\
 245     switch(size) {\
 246     case 1:\
 247         stb(ptr, (typeof(*ptr))(x));\
 248         break;\
 249     case 2:\
 250         stw(ptr, (typeof(*ptr))(x));\
 251         break;\
 252     case 4:\
 253         stl(ptr, (typeof(*ptr))(x));\
 254         break;\
 255     case 8:\
 256         stq(ptr, (typeof(*ptr))(x));\
 257         break;\
 258     default:\
 259         abort();\
 260     }\
 261     0;\
 262 })
 263 static inline long get_errno(long ret)
 264 {
 265     if (ret == -1)
 266         return -errno;
 267     else
 268         return ret;
 269 }
 270
 271 static inline int is_error(long ret)
 272 {
 273     return (unsigned long)ret >= (unsigned long)(-4096);
 274 }
 275
 276 static char *target_brk;
 277 static char *target_original_brk;
 278
 279 void target_set_brk(char *new_brk)
 280 {
 281     target_brk = new_brk;
 282     target_original_brk = new_brk;
 283 }
 284
 285 static long do_brk(char *new_brk)
 286 {
 287     char *brk_page;
 288     long mapped_addr;
 289     int new_alloc_size;
 290
 291     if (!new_brk)
 292         return (long)target_brk;
 293     if (new_brk < target_original_brk)
 294         return -ENOMEM;
 295
 296     brk_page = (char *)HOST_PAGE_ALIGN((unsigned long)target_brk);
 297
 298     /* If the new brk is less than this, set it and we're done... */
 299     if (new_brk < brk_page) {
 300         target_brk = new_brk;
 301         return (long)target_brk;
 302     }
 303
 304     /* We need to allocate more memory after the brk... */
 305     new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page + 1);
 306     mapped_addr = get_errno(target_mmap((unsigned long)brk_page, new_alloc_size,
 307                                         PROT_READ|PROT_WRITE,
 308                                         MAP_ANON|MAP_FIXED|MAP_PRIVATE, 0, 0));
 309     if (is_error(mapped_addr)) {
 310         return mapped_addr;
 311     } else {
 312         target_brk = new_brk;
 313         return (long)target_brk;
 314     }
 315 }
 316
 317 static inline fd_set *target_to_host_fds(fd_set *fds,
 318                                          target_long *target_fds, int n)
 319 {
 320 #if !defined(BSWAP_NEEDED) && !defined(WORDS_BIGENDIAN)
 321     return (fd_set *)target_fds;
 322 #else
 323     int i, b;
 324     if (target_fds) {
 325         FD_ZERO(fds);
 326         for(i = 0;i < n; i++) {
 327             b = (tswapl(target_fds[i / TARGET_LONG_BITS]) >>
 328                  (i & (TARGET_LONG_BITS - 1))) & 1;
 329             if (b)
 330                 FD_SET(i, fds);
 331         }
 332         return fds;
 333     } else {
 334         return NULL;
 335     }
 336 #endif
 337 }
 338
 339 static inline void host_to_target_fds(target_long *target_fds,
 340                                       fd_set *fds, int n)
 341 {
 342 #if !defined(BSWAP_NEEDED) && !defined(WORDS_BIGENDIAN)
 343     /* nothing to do */
 344 #else
 345     int i, nw, j, k;
 346     target_long v;
 347
 348     if (target_fds) {
 349         nw = n / TARGET_LONG_BITS;
 350         k = 0;
 351         for(i = 0;i < nw; i++) {
 352             v = 0;
 353             for(j = 0; j < TARGET_LONG_BITS; j++) {
 354                 v |= ((FD_ISSET(k, fds) != 0) << j);
 355                 k++;
 356             }
 357             target_fds[i] = tswapl(v);
 358         }
 359     }
 360 #endif
 361 }
 362
 363 #if defined(__alpha__)
 364 #define HOST_HZ 1024
 365 #else
 366 #define HOST_HZ 100
 367 #endif
 368
 369 static inline long host_to_target_clock_t(long ticks)
 370 {
 371 #if HOST_HZ == TARGET_HZ
 372     return ticks;
 373 #else
 374     return ((int64_t)ticks * TARGET_HZ) / HOST_HZ;
 375 #endif
 376 }
 377
 378 static inline void host_to_target_rusage(struct target_rusage *target_rusage,
 379                                          const struct rusage *rusage)
 380 {
 381     target_rusage->ru_utime.tv_sec = tswapl(rusage->ru_utime.tv_sec);
 382     target_rusage->ru_utime.tv_usec = tswapl(rusage->ru_utime.tv_usec);
 383     target_rusage->ru_stime.tv_sec = tswapl(rusage->ru_stime.tv_sec);
 384     target_rusage->ru_stime.tv_usec = tswapl(rusage->ru_stime.tv_usec);
 385     target_rusage->ru_maxrss = tswapl(rusage->ru_maxrss);
 386     target_rusage->ru_ixrss = tswapl(rusage->ru_ixrss);
 387     target_rusage->ru_idrss = tswapl(rusage->ru_idrss);
 388     target_rusage->ru_isrss = tswapl(rusage->ru_isrss);
 389     target_rusage->ru_minflt = tswapl(rusage->ru_minflt);
 390     target_rusage->ru_majflt = tswapl(rusage->ru_majflt);
 391     target_rusage->ru_nswap = tswapl(rusage->ru_nswap);
 392     target_rusage->ru_inblock = tswapl(rusage->ru_inblock);
 393     target_rusage->ru_oublock = tswapl(rusage->ru_oublock);
 394     target_rusage->ru_msgsnd = tswapl(rusage->ru_msgsnd);
 395     target_rusage->ru_msgrcv = tswapl(rusage->ru_msgrcv);
 396     target_rusage->ru_nsignals = tswapl(rusage->ru_nsignals);
 397     target_rusage->ru_nvcsw = tswapl(rusage->ru_nvcsw);
 398     target_rusage->ru_nivcsw = tswapl(rusage->ru_nivcsw);
 399 }
 400
 401 static inline void target_to_host_timeval(struct timeval *tv,
 402                                           const struct target_timeval *target_tv)
 403 {
 404     tv->tv_sec = tswapl(target_tv->tv_sec);
 405     tv->tv_usec = tswapl(target_tv->tv_usec);
 406 }
 407
 408 static inline void host_to_target_timeval(struct target_timeval *target_tv,
 409                                           const struct timeval *tv)
 410 {
 411     target_tv->tv_sec = tswapl(tv->tv_sec);
 412     target_tv->tv_usec = tswapl(tv->tv_usec);
 413 }
 414
 415
 416 static long do_select(long n,
 417                       target_long *target_rfds, target_long *target_wfds,
 418                       target_long *target_efds, struct target_timeval *target_tv)
 419 {
 420     fd_set rfds, wfds, efds;
 421     fd_set *rfds_ptr, *wfds_ptr, *efds_ptr;
 422     struct timeval tv, *tv_ptr;
 423     long ret;
 424
 425     rfds_ptr = target_to_host_fds(&rfds, target_rfds, n);
 426     wfds_ptr = target_to_host_fds(&wfds, target_wfds, n);
 427     efds_ptr = target_to_host_fds(&efds, target_efds, n);
 428
 429     if (target_tv) {
 430         target_to_host_timeval(&tv, target_tv);
 431         tv_ptr = &tv;
 432     } else {
 433         tv_ptr = NULL;
 434     }
 435     ret = get_errno(select(n, rfds_ptr, wfds_ptr, efds_ptr, tv_ptr));
 436     if (!is_error(ret)) {
 437         host_to_target_fds(target_rfds, rfds_ptr, n);
 438         host_to_target_fds(target_wfds, wfds_ptr, n);
 439         host_to_target_fds(target_efds, efds_ptr, n);
 440
 441         if (target_tv) {
 442             host_to_target_timeval(target_tv, &tv);
 443         }
 444     }
 445     return ret;
 446 }
 447
 448 static inline void target_to_host_sockaddr(struct sockaddr *addr,
 449                                            struct target_sockaddr *target_addr,
 450                                            socklen_t len)
 451 {
 452     memcpy(addr, target_addr, len);
 453     addr->sa_family = tswap16(target_addr->sa_family);
 454 }
 455
 456 static inline void host_to_target_sockaddr(struct target_sockaddr *target_addr,
 457                                            struct sockaddr *addr,
 458                                            socklen_t len)
 459 {
 460     memcpy(target_addr, addr, len);
 461     target_addr->sa_family = tswap16(addr->sa_family);
 462 }
 463
 464 static inline void target_to_host_cmsg(struct msghdr *msgh,
 465                                        struct target_msghdr *target_msgh)
 466 {
 467     struct cmsghdr *cmsg = CMSG_FIRSTHDR(msgh);
 468     struct target_cmsghdr *target_cmsg = TARGET_CMSG_FIRSTHDR(target_msgh);
 469     socklen_t space = 0;
 470
 471     while (cmsg && target_cmsg) {
 472         void *data = CMSG_DATA(cmsg);
 473         void *target_data = TARGET_CMSG_DATA(target_cmsg);
 474
 475         int len = tswapl(target_cmsg->cmsg_len)
 476                   - TARGET_CMSG_ALIGN(sizeof (struct target_cmsghdr));
 477
 478         space += CMSG_SPACE(len);
 479         if (space > msgh->msg_controllen) {
 480             space -= CMSG_SPACE(len);
 481             gemu_log("Host cmsg overflow");
 482             break;
 483         }
 484
 485         cmsg->cmsg_level = tswap32(target_cmsg->cmsg_level);
 486         cmsg->cmsg_type = tswap32(target_cmsg->cmsg_type);
 487         cmsg->cmsg_len = CMSG_LEN(len);
 488
 489         if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
 490             gemu_log("Unsupported ancillary data: %d/%d\n", cmsg->cmsg_level, cmsg->cmsg_type);
 491             memcpy(data, target_data, len);
 492         } else {
 493             int *fd = (int *)data;
 494             int *target_fd = (int *)target_data;
 495             int i, numfds = len / sizeof(int);
 496
 497             for (i = 0; i < numfds; i++)
 498                 fd[i] = tswap32(target_fd[i]);
 499         }
 500
 501         cmsg = CMSG_NXTHDR(msgh, cmsg);
 502         target_cmsg = TARGET_CMSG_NXTHDR(target_msgh, target_cmsg);
 503     }
 504
 505     msgh->msg_controllen = space;
 506 }
 507
 508 static inline void host_to_target_cmsg(struct target_msghdr *target_msgh,
 509                                        struct msghdr *msgh)
 510 {
 511     struct cmsghdr *cmsg = CMSG_FIRSTHDR(msgh);
 512     struct target_cmsghdr *target_cmsg = TARGET_CMSG_FIRSTHDR(target_msgh);
 513     socklen_t space = 0;
 514
 515     while (cmsg && target_cmsg) {
 516         void *data = CMSG_DATA(cmsg);
 517         void *target_data = TARGET_CMSG_DATA(target_cmsg);
 518
 519         int len = cmsg->cmsg_len - CMSG_ALIGN(sizeof (struct cmsghdr));
 520
 521         space += TARGET_CMSG_SPACE(len);
 522         if (space > tswapl(target_msgh->msg_controllen)) {
 523             space -= TARGET_CMSG_SPACE(len);
 524             gemu_log("Target cmsg overflow");
 525             break;
 526         }
 527
 528         target_cmsg->cmsg_level = tswap32(cmsg->cmsg_level);
 529         target_cmsg->cmsg_type = tswap32(cmsg->cmsg_type);
 530         target_cmsg->cmsg_len = tswapl(TARGET_CMSG_LEN(len));
 531
 532         if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
 533             gemu_log("Unsupported ancillary data: %d/%d\n", cmsg->cmsg_level, cmsg->cmsg_type);
 534             memcpy(target_data, data, len);
 535         } else {
 536             int *fd = (int *)data;
 537             int *target_fd = (int *)target_data;
 538             int i, numfds = len / sizeof(int);
 539
 540             for (i = 0; i < numfds; i++)
 541                 target_fd[i] = tswap32(fd[i]);
 542         }
 543
 544         cmsg = CMSG_NXTHDR(msgh, cmsg);
 545         target_cmsg = TARGET_CMSG_NXTHDR(target_msgh, target_cmsg);
 546     }
 547
 548     msgh->msg_controllen = tswapl(space);
 549 }
 550
 551 static long do_setsockopt(int sockfd, int level, int optname,
 552                           void *optval, socklen_t optlen)
 553 {
 554     if (level == SOL_TCP) {
 555         /* TCP options all take an 'int' value.  */
 556         int val;
 557
 558         if (optlen < sizeof(uint32_t))
 559             return -EINVAL;
 560
 561         val = tswap32(*(uint32_t *)optval);
 562         return get_errno(setsockopt(sockfd, level, optname, &val, sizeof(val)));
 563     }
 564
 565     else if (level != SOL_SOCKET) {
 566         gemu_log("Unsupported setsockopt level: %d\n", level);
 567         return -ENOSYS;
 568     }
 569
 570     switch (optname) {
 571     /* Options with 'int' argument.  */
 572     case SO_DEBUG:
 573     case SO_REUSEADDR:
 574     case SO_TYPE:
 575     case SO_ERROR:
 576     case SO_DONTROUTE:
 577     case SO_BROADCAST:
 578     case SO_SNDBUF:
 579     case SO_RCVBUF:
 580     case SO_KEEPALIVE:
 581     case SO_OOBINLINE:
 582     case SO_NO_CHECK:
 583     case SO_PRIORITY:
 584     case SO_BSDCOMPAT:
 585     case SO_PASSCRED:
 586     case SO_TIMESTAMP:
 587     case SO_RCVLOWAT:
 588     case SO_RCVTIMEO:
 589     case SO_SNDTIMEO:
 590     {
 591         int val;
 592         if (optlen < sizeof(uint32_t))
 593             return -EINVAL;
 594         val = tswap32(*(uint32_t *)optval);
 595         return get_errno(setsockopt(sockfd, level, optname, &val, sizeof(val)));
 596     }
 597
 598     default:
 599         gemu_log("Unsupported setsockopt SOL_SOCKET option: %d\n", optname);
 600         return -ENOSYS;
 601     }
 602 }
 603
 604 static long do_getsockopt(int sockfd, int level, int optname,
 605                           void *optval, socklen_t *optlen)
 606 {
 607     gemu_log("getsockopt not yet supported\n");
 608     return -ENOSYS;
 609 }
 610
 611 static long do_socketcall(int num, int32_t *vptr)
 612 {
 613     long ret;
 614
 615     switch(num) {
 616     case SOCKOP_socket:
 617         {
 618             int domain = tswap32(vptr[0]);
 619             int type = tswap32(vptr[1]);
 620             int protocol = tswap32(vptr[2]);
 621
 622             ret = get_errno(socket(domain, type, protocol));
 623         }
 624         break;
 625     case SOCKOP_bind:
 626         {
 627             int sockfd = tswap32(vptr[0]);
 628             void *target_addr = (void *)tswap32(vptr[1]);
 629             socklen_t addrlen = tswap32(vptr[2]);
 630             void *addr = alloca(addrlen);
 631
 632             target_to_host_sockaddr(addr, target_addr, addrlen);
 633             ret = get_errno(bind(sockfd, addr, addrlen));
 634         }
 635         break;
 636     case SOCKOP_connect:
 637         {
 638             int sockfd = tswap32(vptr[0]);
 639             void *target_addr = (void *)tswap32(vptr[1]);
 640             socklen_t addrlen = tswap32(vptr[2]);
 641             void *addr = alloca(addrlen);
 642
 643             target_to_host_sockaddr(addr, target_addr, addrlen);
 644             ret = get_errno(connect(sockfd, addr, addrlen));
 645         }
 646         break;
 647     case SOCKOP_listen:
 648         {
 649             int sockfd = tswap32(vptr[0]);
 650             int backlog = tswap32(vptr[1]);
 651
 652             ret = get_errno(listen(sockfd, backlog));
 653         }
 654         break;
 655     case SOCKOP_accept:
 656         {
 657             int sockfd = tswap32(vptr[0]);
 658             void *target_addr = (void *)tswap32(vptr[1]);
 659             uint32_t *target_addrlen = (void *)tswap32(vptr[2]);
 660             socklen_t addrlen = tswap32(*target_addrlen);
 661             void *addr = alloca(addrlen);
 662
 663             ret = get_errno(accept(sockfd, addr, &addrlen));
 664             if (!is_error(ret)) {
 665                 host_to_target_sockaddr(target_addr, addr, addrlen);
 666                 *target_addrlen = tswap32(addrlen);
 667             }
 668         }
 669         break;
 670     case SOCKOP_getsockname:
 671         {
 672             int sockfd = tswap32(vptr[0]);
 673             void *target_addr = (void *)tswap32(vptr[1]);
 674             uint32_t *target_addrlen = (void *)tswap32(vptr[2]);
 675             socklen_t addrlen = tswap32(*target_addrlen);
 676             void *addr = alloca(addrlen);
 677
 678             ret = get_errno(getsockname(sockfd, addr, &addrlen));
 679             if (!is_error(ret)) {
 680                 host_to_target_sockaddr(target_addr, addr, addrlen);
 681                 *target_addrlen = tswap32(addrlen);
 682             }
 683         }
 684         break;
 685     case SOCKOP_getpeername:
 686         {
 687             int sockfd = tswap32(vptr[0]);
 688             void *target_addr = (void *)tswap32(vptr[1]);
 689             uint32_t *target_addrlen = (void *)tswap32(vptr[2]);
 690             socklen_t addrlen = tswap32(*target_addrlen);
 691             void *addr = alloca(addrlen);
 692
 693             ret = get_errno(getpeername(sockfd, addr, &addrlen));
 694             if (!is_error(ret)) {
 695                 host_to_target_sockaddr(target_addr, addr, addrlen);
 696                 *target_addrlen = tswap32(addrlen);
 697             }
 698         }
 699         break;
 700     case SOCKOP_socketpair:
 701         {
 702             int domain = tswap32(vptr[0]);
 703             int type = tswap32(vptr[1]);
 704             int protocol = tswap32(vptr[2]);
 705             int32_t *target_tab = (void *)tswap32(vptr[3]);
 706             int tab[2];
 707
 708             ret = get_errno(socketpair(domain, type, protocol, tab));
 709             if (!is_error(ret)) {
 710                 target_tab[0] = tswap32(tab[0]);
 711                 target_tab[1] = tswap32(tab[1]);
 712             }
 713         }
 714         break;
 715     case SOCKOP_send:
 716         {
 717             int sockfd = tswap32(vptr[0]);
 718             void *msg = (void *)tswap32(vptr[1]);
 719             size_t len = tswap32(vptr[2]);
 720             int flags = tswap32(vptr[3]);
 721
 722             ret = get_errno(send(sockfd, msg, len, flags));
 723         }
 724         break;
 725     case SOCKOP_recv:
 726         {
 727             int sockfd = tswap32(vptr[0]);
 728             void *msg = (void *)tswap32(vptr[1]);
 729             size_t len = tswap32(vptr[2]);
 730             int flags = tswap32(vptr[3]);
 731
 732             ret = get_errno(recv(sockfd, msg, len, flags));
 733         }
 734         break;
 735     case SOCKOP_sendto:
 736         {
 737             int sockfd = tswap32(vptr[0]);
 738             void *msg = (void *)tswap32(vptr[1]);
 739             size_t len = tswap32(vptr[2]);
 740             int flags = tswap32(vptr[3]);
 741             void *target_addr = (void *)tswap32(vptr[4]);
 742             socklen_t addrlen = tswap32(vptr[5]);
 743             void *addr = alloca(addrlen);
 744
 745             target_to_host_sockaddr(addr, target_addr, addrlen);
 746             ret = get_errno(sendto(sockfd, msg, len, flags, addr, addrlen));
 747         }
 748         break;
 749     case SOCKOP_recvfrom:
 750         {
 751             int sockfd = tswap32(vptr[0]);
 752             void *msg = (void *)tswap32(vptr[1]);
 753             size_t len = tswap32(vptr[2]);
 754             int flags = tswap32(vptr[3]);
 755             void *target_addr = (void *)tswap32(vptr[4]);
 756             uint32_t *target_addrlen = (void *)tswap32(vptr[5]);
 757             socklen_t addrlen = tswap32(*target_addrlen);
 758             void *addr = alloca(addrlen);
 759
 760             ret = get_errno(recvfrom(sockfd, msg, len, flags, addr, &addrlen));
 761             if (!is_error(ret)) {
 762                 host_to_target_sockaddr(target_addr, addr, addrlen);
 763                 *target_addrlen = tswap32(addrlen);
 764             }
 765         }
 766         break;
 767     case SOCKOP_shutdown:
 768         {
 769             int sockfd = tswap32(vptr[0]);
 770             int how = tswap32(vptr[1]);
 771
 772             ret = get_errno(shutdown(sockfd, how));
 773         }
 774         break;
 775     case SOCKOP_sendmsg:
 776     case SOCKOP_recvmsg:
 777         {
 778             int fd;
 779             struct target_msghdr *msgp;
 780             struct msghdr msg;
 781             int flags, count, i;
 782             struct iovec *vec;
 783             struct target_iovec *target_vec;
 784
 785             msgp = (void *)tswap32(vptr[1]);
 786             msg.msg_name = (void *)tswapl(msgp->msg_name);
 787             msg.msg_namelen = tswapl(msgp->msg_namelen);
 788             msg.msg_controllen = 2 * tswapl(msgp->msg_controllen);
 789             msg.msg_control = alloca(msg.msg_controllen);
 790             msg.msg_flags = tswap32(msgp->msg_flags);
 791
 792             count = tswapl(msgp->msg_iovlen);
 793             vec = alloca(count * sizeof(struct iovec));
 794             target_vec = (void *)tswapl(msgp->msg_iov);
 795             for(i = 0;i < count; i++) {
 796                 vec[i].iov_base = (void *)tswapl(target_vec[i].iov_base);
 797                 vec[i].iov_len = tswapl(target_vec[i].iov_len);
 798             }
 799             msg.msg_iovlen = count;
 800             msg.msg_iov = vec;
 801
 802             fd = tswap32(vptr[0]);
 803             flags = tswap32(vptr[2]);
 804             if (num == SOCKOP_sendmsg) {
 805                 target_to_host_cmsg(&msg, msgp);
 806                 ret = get_errno(sendmsg(fd, &msg, flags));
 807             } else {
 808                 ret = get_errno(recvmsg(fd, &msg, flags));
 809                 if (!is_error(ret))
 810                   host_to_target_cmsg(msgp, &msg);
 811             }
 812         }
 813         break;
 814     case SOCKOP_setsockopt:
 815         {
 816             int sockfd = tswap32(vptr[0]);
 817             int level = tswap32(vptr[1]);
 818             int optname = tswap32(vptr[2]);
 819             void *optval = (void *)tswap32(vptr[3]);
 820             socklen_t optlen = tswap32(vptr[4]);
 821
 822             ret = do_setsockopt(sockfd, level, optname, optval, optlen);
 823         }
 824         break;
 825     case SOCKOP_getsockopt:
 826         {
 827             int sockfd = tswap32(vptr[0]);
 828             int level = tswap32(vptr[1]);
 829             int optname = tswap32(vptr[2]);
 830             void *optval = (void *)tswap32(vptr[3]);
 831             uint32_t *target_len = (void *)tswap32(vptr[4]);
 832             socklen_t optlen = tswap32(*target_len);
 833
 834             ret = do_getsockopt(sockfd, level, optname, optval, &optlen);
 835             if (!is_error(ret))
 836                 *target_len = tswap32(optlen);
 837         }
 838         break;
 839     default:
 840         gemu_log("Unsupported socketcall: %d\n", num);
 841         ret = -ENOSYS;
 842         break;
 843     }
 844     return ret;
 845 }
 846
 847 /* kernel structure types definitions */
 848 #define IFNAMSIZ        16
 849
 850 #define STRUCT(name, list...) STRUCT_ ## name,
 851 #define STRUCT_SPECIAL(name) STRUCT_ ## name,
 852 enum {
 853 #include "syscall_types.h"
 854 };
 855 #undef STRUCT
 856 #undef STRUCT_SPECIAL
 857
 858 #define STRUCT(name, list...) const argtype struct_ ## name ## _def[] = { list, TYPE_NULL };
 859 #define STRUCT_SPECIAL(name)
 860 #include "syscall_types.h"
 861 #undef STRUCT
 862 #undef STRUCT_SPECIAL
 863
 864 typedef struct IOCTLEntry {
 865     unsigned int target_cmd;
 866     unsigned int host_cmd;
 867     const char *name;
 868     int access;
 869     const argtype arg_type[5];
 870 } IOCTLEntry;
 871
 872 #define IOC_R 0x0001
 873 #define IOC_W 0x0002
 874 #define IOC_RW (IOC_R | IOC_W)
 875
 876 #define MAX_STRUCT_SIZE 4096
 877
 878 IOCTLEntry ioctl_entries[] = {
 879 #define IOCTL(cmd, access, types...) \
 880     { TARGET_ ## cmd, cmd, #cmd, access, { types } },
 881 #include "ioctls.h"
 882     { 0, 0, },
 883 };
 884
 885 static long do_ioctl(long fd, long cmd, long arg)
 886 {
 887     const IOCTLEntry *ie;
 888     const argtype *arg_type;
 889     long ret;
 890     uint8_t buf_temp[MAX_STRUCT_SIZE];
 891
 892     ie = ioctl_entries;
 893     for(;;) {
 894         if (ie->target_cmd == 0) {
 895             gemu_log("Unsupported ioctl: cmd=0x%04lx\n", cmd);
 896             return -ENOSYS;
 897         }
 898         if (ie->target_cmd == cmd)
 899             break;
 900         ie++;
 901     }
 902     arg_type = ie->arg_type;
 903 #if defined(DEBUG)
 904     gemu_log("ioctl: cmd=0x%04lx (%s)\n", cmd, ie->name);
 905 #endif
 906     switch(arg_type[0]) {
 907     case TYPE_NULL:
 908         /* no argument */
 909         ret = get_errno(ioctl(fd, ie->host_cmd));
 910         break;
 911     case TYPE_PTRVOID:
 912     case TYPE_INT:
 913         /* int argment */
 914         ret = get_errno(ioctl(fd, ie->host_cmd, arg));
 915         break;
 916     case TYPE_PTR:
 917         arg_type++;
 918         switch(ie->access) {
 919         case IOC_R:
 920             ret = get_errno(ioctl(fd, ie->host_cmd, buf_temp));
 921             if (!is_error(ret)) {
 922                 thunk_convert((void *)arg, buf_temp, arg_type, THUNK_TARGET);
 923             }
 924             break;
 925         case IOC_W:
 926             thunk_convert(buf_temp, (void *)arg, arg_type, THUNK_HOST);
 927             ret = get_errno(ioctl(fd, ie->host_cmd, buf_temp));
 928             break;
 929         default:
 930         case IOC_RW:
 931             thunk_convert(buf_temp, (void *)arg, arg_type, THUNK_HOST);
 932             ret = get_errno(ioctl(fd, ie->host_cmd, buf_temp));
 933             if (!is_error(ret)) {
 934                 thunk_convert((void *)arg, buf_temp, arg_type, THUNK_TARGET);
 935             }
 936             break;
 937         }
 938         break;
 939     default:
 940         gemu_log("Unsupported ioctl type: cmd=0x%04lx type=%d\n", cmd, arg_type[0]);
 941         ret = -ENOSYS;
 942         break;
 943     }
 944     return ret;
 945 }
 946
 947 bitmask_transtbl iflag_tbl[] = {
 948         { TARGET_IGNBRK, TARGET_IGNBRK, IGNBRK, IGNBRK },
 949         { TARGET_BRKINT, TARGET_BRKINT, BRKINT, BRKINT },
 950         { TARGET_IGNPAR, TARGET_IGNPAR, IGNPAR, IGNPAR },
 951         { TARGET_PARMRK, TARGET_PARMRK, PARMRK, PARMRK },
 952         { TARGET_INPCK, TARGET_INPCK, INPCK, INPCK },
 953         { TARGET_ISTRIP, TARGET_ISTRIP, ISTRIP, ISTRIP },
 954         { TARGET_INLCR, TARGET_INLCR, INLCR, INLCR },
 955         { TARGET_IGNCR, TARGET_IGNCR, IGNCR, IGNCR },
 956         { TARGET_ICRNL, TARGET_ICRNL, ICRNL, ICRNL },
 957         { TARGET_IUCLC, TARGET_IUCLC, IUCLC, IUCLC },
 958         { TARGET_IXON, TARGET_IXON, IXON, IXON },
 959         { TARGET_IXANY, TARGET_IXANY, IXANY, IXANY },
 960         { TARGET_IXOFF, TARGET_IXOFF, IXOFF, IXOFF },
 961         { TARGET_IMAXBEL, TARGET_IMAXBEL, IMAXBEL, IMAXBEL },
 962         { 0, 0, 0, 0 }
 963 };
 964
 965 bitmask_transtbl oflag_tbl[] = {
 966         { TARGET_OPOST, TARGET_OPOST, OPOST, OPOST },
 967         { TARGET_OLCUC, TARGET_OLCUC, OLCUC, OLCUC },
 968         { TARGET_ONLCR, TARGET_ONLCR, ONLCR, ONLCR },
 969         { TARGET_OCRNL, TARGET_OCRNL, OCRNL, OCRNL },
 970         { TARGET_ONOCR, TARGET_ONOCR, ONOCR, ONOCR },
 971         { TARGET_ONLRET, TARGET_ONLRET, ONLRET, ONLRET },
 972         { TARGET_OFILL, TARGET_OFILL, OFILL, OFILL },
 973         { TARGET_OFDEL, TARGET_OFDEL, OFDEL, OFDEL },
 974         { TARGET_NLDLY, TARGET_NL0, NLDLY, NL0 },
 975         { TARGET_NLDLY, TARGET_NL1, NLDLY, NL1 },
 976         { TARGET_CRDLY, TARGET_CR0, CRDLY, CR0 },
 977         { TARGET_CRDLY, TARGET_CR1, CRDLY, CR1 },
 978         { TARGET_CRDLY, TARGET_CR2, CRDLY, CR2 },
 979         { TARGET_CRDLY, TARGET_CR3, CRDLY, CR3 },
 980         { TARGET_TABDLY, TARGET_TAB0, TABDLY, TAB0 },
 981         { TARGET_TABDLY, TARGET_TAB1, TABDLY, TAB1 },
 982         { TARGET_TABDLY, TARGET_TAB2, TABDLY, TAB2 },
 983         { TARGET_TABDLY, TARGET_TAB3, TABDLY, TAB3 },
 984         { TARGET_BSDLY, TARGET_BS0, BSDLY, BS0 },
 985         { TARGET_BSDLY, TARGET_BS1, BSDLY, BS1 },
 986         { TARGET_VTDLY, TARGET_VT0, VTDLY, VT0 },
 987         { TARGET_VTDLY, TARGET_VT1, VTDLY, VT1 },
 988         { TARGET_FFDLY, TARGET_FF0, FFDLY, FF0 },
 989         { TARGET_FFDLY, TARGET_FF1, FFDLY, FF1 },
 990         { 0, 0, 0, 0 }
 991 };
 992
 993 bitmask_transtbl cflag_tbl[] = {
 994         { TARGET_CBAUD, TARGET_B0, CBAUD, B0 },
 995         { TARGET_CBAUD, TARGET_B50, CBAUD, B50 },
 996         { TARGET_CBAUD, TARGET_B75, CBAUD, B75 },
 997         { TARGET_CBAUD, TARGET_B110, CBAUD, B110 },
 998         { TARGET_CBAUD, TARGET_B134, CBAUD, B134 },
 999         { TARGET_CBAUD, TARGET_B150, CBAUD, B150 },
1000         { TARGET_CBAUD, TARGET_B200, CBAUD, B200 },
1001         { TARGET_CBAUD, TARGET_B300, CBAUD, B300 },
1002         { TARGET_CBAUD, TARGET_B600, CBAUD, B600 },
1003         { TARGET_CBAUD, TARGET_B1200, CBAUD, B1200 },
1004         { TARGET_CBAUD, TARGET_B1800, CBAUD, B1800 },
1005         { TARGET_CBAUD, TARGET_B2400, CBAUD, B2400 },
1006         { TARGET_CBAUD, TARGET_B4800, CBAUD, B4800 },
1007         { TARGET_CBAUD, TARGET_B9600, CBAUD, B9600 },
1008         { TARGET_CBAUD, TARGET_B19200, CBAUD, B19200 },
1009         { TARGET_CBAUD, TARGET_B38400, CBAUD, B38400 },
1010         { TARGET_CBAUD, TARGET_B57600, CBAUD, B57600 },
1011         { TARGET_CBAUD, TARGET_B115200, CBAUD, B115200 },
1012         { TARGET_CBAUD, TARGET_B230400, CBAUD, B230400 },
1013         { TARGET_CBAUD, TARGET_B460800, CBAUD, B460800 },
1014         { TARGET_CSIZE, TARGET_CS5, CSIZE, CS5 },
1015         { TARGET_CSIZE, TARGET_CS6, CSIZE, CS6 },
1016         { TARGET_CSIZE, TARGET_CS7, CSIZE, CS7 },
1017         { TARGET_CSIZE, TARGET_CS8, CSIZE, CS8 },
1018         { TARGET_CSTOPB, TARGET_CSTOPB, CSTOPB, CSTOPB },
1019         { TARGET_CREAD, TARGET_CREAD, CREAD, CREAD },
1020         { TARGET_PARENB, TARGET_PARENB, PARENB, PARENB },
1021         { TARGET_PARODD, TARGET_PARODD, PARODD, PARODD },
1022         { TARGET_HUPCL, TARGET_HUPCL, HUPCL, HUPCL },
1023         { TARGET_CLOCAL, TARGET_CLOCAL, CLOCAL, CLOCAL },
1024         { TARGET_CRTSCTS, TARGET_CRTSCTS, CRTSCTS, CRTSCTS },
1025         { 0, 0, 0, 0 }
1026 };
1027
1028 bitmask_transtbl lflag_tbl[] = {
1029         { TARGET_ISIG, TARGET_ISIG, ISIG, ISIG },
1030         { TARGET_ICANON, TARGET_ICANON, ICANON, ICANON },
1031         { TARGET_XCASE, TARGET_XCASE, XCASE, XCASE },
1032         { TARGET_ECHO, TARGET_ECHO, ECHO, ECHO },
1033         { TARGET_ECHOE, TARGET_ECHOE, ECHOE, ECHOE },
1034         { TARGET_ECHOK, TARGET_ECHOK, ECHOK, ECHOK },
1035         { TARGET_ECHONL, TARGET_ECHONL, ECHONL, ECHONL },
1036         { TARGET_NOFLSH, TARGET_NOFLSH, NOFLSH, NOFLSH },
1037         { TARGET_TOSTOP, TARGET_TOSTOP, TOSTOP, TOSTOP },
1038         { TARGET_ECHOCTL, TARGET_ECHOCTL, ECHOCTL, ECHOCTL },
1039         { TARGET_ECHOPRT, TARGET_ECHOPRT, ECHOPRT, ECHOPRT },
1040         { TARGET_ECHOKE, TARGET_ECHOKE, ECHOKE, ECHOKE },
1041         { TARGET_FLUSHO, TARGET_FLUSHO, FLUSHO, FLUSHO },
1042         { TARGET_PENDIN, TARGET_PENDIN, PENDIN, PENDIN },
1043         { TARGET_IEXTEN, TARGET_IEXTEN, IEXTEN, IEXTEN },
1044         { 0, 0, 0, 0 }
1045 };
1046
1047 static void target_to_host_termios (void *dst, const void *src)
1048 {
1049     struct host_termios *host = dst;
1050     const struct target_termios *target = src;
1051
1052     host->c_iflag =
1053         target_to_host_bitmask(tswap32(target->c_iflag), iflag_tbl);
1054     host->c_oflag =
1055         target_to_host_bitmask(tswap32(target->c_oflag), oflag_tbl);
1056     host->c_cflag =
1057         target_to_host_bitmask(tswap32(target->c_cflag), cflag_tbl);
1058     host->c_lflag =
1059         target_to_host_bitmask(tswap32(target->c_lflag), lflag_tbl);
1060     host->c_line = target->c_line;
1061
1062     host->c_cc[VINTR] = target->c_cc[TARGET_VINTR];
1063     host->c_cc[VQUIT] = target->c_cc[TARGET_VQUIT];
1064     host->c_cc[VERASE] = target->c_cc[TARGET_VERASE];
1065     host->c_cc[VKILL] = target->c_cc[TARGET_VKILL];
1066     host->c_cc[VEOF] = target->c_cc[TARGET_VEOF];
1067     host->c_cc[VTIME] = target->c_cc[TARGET_VTIME];
1068     host->c_cc[VMIN] = target->c_cc[TARGET_VMIN];
1069     host->c_cc[VSWTC] = target->c_cc[TARGET_VSWTC];
1070     host->c_cc[VSTART] = target->c_cc[TARGET_VSTART];
1071     host->c_cc[VSTOP] = target->c_cc[TARGET_VSTOP];
1072     host->c_cc[VSUSP] = target->c_cc[TARGET_VSUSP];
1073     host->c_cc[VEOL] = target->c_cc[TARGET_VEOL];
1074     host->c_cc[VREPRINT] = target->c_cc[TARGET_VREPRINT];
1075     host->c_cc[VDISCARD] = target->c_cc[TARGET_VDISCARD];
1076     host->c_cc[VWERASE] = target->c_cc[TARGET_VWERASE];
1077     host->c_cc[VLNEXT] = target->c_cc[TARGET_VLNEXT];
1078     host->c_cc[VEOL2] = target->c_cc[TARGET_VEOL2];
1079 }
1080
1081 static void host_to_target_termios (void *dst, const void *src)
1082 {
1083     struct target_termios *target = dst;
1084     const struct host_termios *host = src;
1085
1086     target->c_iflag =
1087         tswap32(host_to_target_bitmask(host->c_iflag, iflag_tbl));
1088     target->c_oflag =
1089         tswap32(host_to_target_bitmask(host->c_oflag, oflag_tbl));
1090     target->c_cflag =
1091         tswap32(host_to_target_bitmask(host->c_cflag, cflag_tbl));
1092     target->c_lflag =
1093         tswap32(host_to_target_bitmask(host->c_lflag, lflag_tbl));
1094     target->c_line = host->c_line;
1095
1096     target->c_cc[TARGET_VINTR] = host->c_cc[VINTR];
1097     target->c_cc[TARGET_VQUIT] = host->c_cc[VQUIT];
1098     target->c_cc[TARGET_VERASE] = host->c_cc[VERASE];
1099     target->c_cc[TARGET_VKILL] = host->c_cc[VKILL];
1100     target->c_cc[TARGET_VEOF] = host->c_cc[VEOF];
1101     target->c_cc[TARGET_VTIME] = host->c_cc[VTIME];
1102     target->c_cc[TARGET_VMIN] = host->c_cc[VMIN];
1103     target->c_cc[TARGET_VSWTC] = host->c_cc[VSWTC];
1104     target->c_cc[TARGET_VSTART] = host->c_cc[VSTART];
1105     target->c_cc[TARGET_VSTOP] = host->c_cc[VSTOP];
1106     target->c_cc[TARGET_VSUSP] = host->c_cc[VSUSP];
1107     target->c_cc[TARGET_VEOL] = host->c_cc[VEOL];
1108     target->c_cc[TARGET_VREPRINT] = host->c_cc[VREPRINT];
1109     target->c_cc[TARGET_VDISCARD] = host->c_cc[VDISCARD];
1110     target->c_cc[TARGET_VWERASE] = host->c_cc[VWERASE];
1111     target->c_cc[TARGET_VLNEXT] = host->c_cc[VLNEXT];
1112     target->c_cc[TARGET_VEOL2] = host->c_cc[VEOL2];
1113 }
1114
1115 StructEntry struct_termios_def = {
1116     .convert = { host_to_target_termios, target_to_host_termios },
1117     .size = { sizeof(struct target_termios), sizeof(struct host_termios) },
1118     .align = { __alignof__(struct target_termios), __alignof__(struct host_termios) },
1119 };
1120
1121 static bitmask_transtbl mmap_flags_tbl[] = {
1122         { TARGET_MAP_SHARED, TARGET_MAP_SHARED, MAP_SHARED, MAP_SHARED },
1123         { TARGET_MAP_PRIVATE, TARGET_MAP_PRIVATE, MAP_PRIVATE, MAP_PRIVATE },
1124         { TARGET_MAP_FIXED, TARGET_MAP_FIXED, MAP_FIXED, MAP_FIXED },
1125         { TARGET_MAP_ANONYMOUS, TARGET_MAP_ANONYMOUS, MAP_ANONYMOUS, MAP_ANONYMOUS },
1126         { TARGET_MAP_GROWSDOWN, TARGET_MAP_GROWSDOWN, MAP_GROWSDOWN, MAP_GROWSDOWN },
1127         { TARGET_MAP_DENYWRITE, TARGET_MAP_DENYWRITE, MAP_DENYWRITE, MAP_DENYWRITE },
1128         { TARGET_MAP_EXECUTABLE, TARGET_MAP_EXECUTABLE, MAP_EXECUTABLE, MAP_EXECUTABLE },
1129         { TARGET_MAP_LOCKED, TARGET_MAP_LOCKED, MAP_LOCKED, MAP_LOCKED },
1130         { 0, 0, 0, 0 }
1131 };
1132
1133 #if defined(TARGET_I386)
1134
1135 /* NOTE: there is really one LDT for all the threads */
1136 uint8_t *ldt_table;
1137
1138 static int read_ldt(void *ptr, unsigned long bytecount)
1139 {
1140     int size;
1141
1142     if (!ldt_table)
1143         return 0;
1144     size = TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE;
1145     if (size > bytecount)
1146         size = bytecount;
1147     memcpy(ptr, ldt_table, size);
1148     return size;
1149 }
1150
1151 /* XXX: add locking support */
1152 static int write_ldt(CPUX86State *env,
1153                      void *ptr, unsigned long bytecount, int oldmode)
1154 {
1155     struct target_modify_ldt_ldt_s ldt_info;
1156     int seg_32bit, contents, read_exec_only, limit_in_pages;
1157     int seg_not_present, useable;
1158     uint32_t *lp, entry_1, entry_2;
1159
1160     if (bytecount != sizeof(ldt_info))
1161         return -EINVAL;
1162     memcpy(&ldt_info, ptr, sizeof(ldt_info));
1163     tswap32s(&ldt_info.entry_number);
1164     tswapls((long *)&ldt_info.base_addr);
1165     tswap32s(&ldt_info.limit);
1166     tswap32s(&ldt_info.flags);
1167
1168     if (ldt_info.entry_number >= TARGET_LDT_ENTRIES)
1169         return -EINVAL;
1170     seg_32bit = ldt_info.flags & 1;
1171     contents = (ldt_info.flags >> 1) & 3;
1172     read_exec_only = (ldt_info.flags >> 3) & 1;
1173     limit_in_pages = (ldt_info.flags >> 4) & 1;
1174     seg_not_present = (ldt_info.flags >> 5) & 1;
1175     useable = (ldt_info.flags >> 6) & 1;
1176
1177     if (contents == 3) {
1178         if (oldmode)
1179             return -EINVAL;
1180         if (seg_not_present == 0)
1181             return -EINVAL;
1182     }
1183     /* allocate the LDT */
1184     if (!ldt_table) {
1185         ldt_table = malloc(TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE);
1186         if (!ldt_table)
1187             return -ENOMEM;
1188         memset(ldt_table, 0, TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE);
1189         env->ldt.base = ldt_table;
1190         env->ldt.limit = 0xffff;
1191     }
1192
1193     /* NOTE: same code as Linux kernel */
1194     /* Allow LDTs to be cleared by the user. */
1195     if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
1196         if (oldmode ||
1197             (contents == 0              &&
1198              read_exec_only == 1        &&
1199              seg_32bit == 0             &&
1200              limit_in_pages == 0        &&
1201              seg_not_present == 1       &&
1202              useable == 0 )) {
1203             entry_1 = 0;
1204             entry_2 = 0;
1205             goto install;
1206         }
1207     }
1208
1209     entry_1 = ((ldt_info.base_addr & 0x0000ffff) << 16) |
1210         (ldt_info.limit & 0x0ffff);
1211     entry_2 = (ldt_info.base_addr & 0xff000000) |
1212         ((ldt_info.base_addr & 0x00ff0000) >> 16) |
1213         (ldt_info.limit & 0xf0000) |
1214         ((read_exec_only ^ 1) << 9) |
1215         (contents << 10) |
1216         ((seg_not_present ^ 1) << 15) |
1217         (seg_32bit << 22) |
1218         (limit_in_pages << 23) |
1219         0x7000;
1220     if (!oldmode)
1221         entry_2 |= (useable << 20);
1222
1223     /* Install the new entry ...  */
1224 install:
1225     lp = (uint32_t *)(ldt_table + (ldt_info.entry_number << 3));
1226     lp[0] = tswap32(entry_1);
1227     lp[1] = tswap32(entry_2);
1228     return 0;
1229 }
1230
1231 /* specific and weird i386 syscalls */
1232 int do_modify_ldt(CPUX86State *env, int func, void *ptr, unsigned long bytecount)
1233 {
1234     int ret = -ENOSYS;
1235
1236     switch (func) {
1237     case 0:
1238         ret = read_ldt(ptr, bytecount);
1239         break;
1240     case 1:
1241         ret = write_ldt(env, ptr, bytecount, 1);
1242         break;
1243     case 0x11:
1244         ret = write_ldt(env, ptr, bytecount, 0);
1245         break;
1246     }
1247     return ret;
1248 }
1249
1250 #endif /* defined(TARGET_I386) */
1251
1252 /* this stack is the equivalent of the kernel stack associated with a
1253    thread/process */
1254 #define NEW_STACK_SIZE 8192
1255
1256 static int clone_func(void *arg)
1257 {
1258     CPUState *env = arg;
1259     cpu_loop(env);
1260     /* never exits */
1261     return 0;
1262 }
1263
1264 int do_fork(CPUState *env, unsigned int flags, unsigned long newsp)
1265 {
1266     int ret;
1267     TaskState *ts;
1268     uint8_t *new_stack;
1269     CPUState *new_env;
1270
1271     if (flags & CLONE_VM) {
1272         ts = malloc(sizeof(TaskState) + NEW_STACK_SIZE);
1273         memset(ts, 0, sizeof(TaskState));
1274         new_stack = ts->stack;
1275         ts->used = 1;
1276         /* add in task state list */
1277         ts->next = first_task_state;
1278         first_task_state = ts;
1279         /* we create a new CPU instance. */
1280         new_env = cpu_init();
1281         memcpy(new_env, env, sizeof(CPUState));
1282 #if defined(TARGET_I386)
1283         if (!newsp)
1284             newsp = env->regs[R_ESP];
1285         new_env->regs[R_ESP] = newsp;
1286         new_env->regs[R_EAX] = 0;
1287 #elif defined(TARGET_ARM)
1288         if (!newsp)
1289             newsp = env->regs[13];
1290         new_env->regs[13] = newsp;
1291         new_env->regs[0] = 0;
1292 #elif defined(TARGET_SPARC)
1293         printf ("HELPME: %s:%d\n", __FILE__, __LINE__);
1294 #elif defined(TARGET_PPC)
1295         if (!newsp)
1296             newsp = env->gpr[1];
1297         new_env->gpr[1] = newsp;
1298         {
1299             int i;
1300             for (i = 7; i < 32; i++)
1301                 new_env->gpr[i] = 0;
1302         }
1303 #else
1304 #error unsupported target CPU
1305 #endif
1306         new_env->opaque = ts;
1307 #ifdef __ia64__
1308         ret = clone2(clone_func, new_stack + NEW_STACK_SIZE, flags, new_env);
1309 #else
1310         ret = clone(clone_func, new_stack + NEW_STACK_SIZE, flags, new_env);
1311 #endif
1312     } else {
1313         /* if no CLONE_VM, we consider it is a fork */
1314         if ((flags & ~CSIGNAL) != 0)
1315             return -EINVAL;
1316         ret = fork();
1317     }
1318     return ret;
1319 }
1320
1321 static long do_fcntl(int fd, int cmd, unsigned long arg)
1322 {
1323     struct flock fl;
1324     struct target_flock *target_fl = (void *)arg;
1325     long ret;
1326
1327     switch(cmd) {
1328     case TARGET_F_GETLK:
1329         ret = fcntl(fd, cmd, &fl);
1330         if (ret == 0) {
1331             target_fl->l_type = tswap16(fl.l_type);
1332             target_fl->l_whence = tswap16(fl.l_whence);
1333             target_fl->l_start = tswapl(fl.l_start);
1334             target_fl->l_len = tswapl(fl.l_len);
1335             target_fl->l_pid = tswapl(fl.l_pid);
1336         }
1337         break;
1338
1339     case TARGET_F_SETLK:
1340     case TARGET_F_SETLKW:
1341         fl.l_type = tswap16(target_fl->l_type);
1342         fl.l_whence = tswap16(target_fl->l_whence);
1343         fl.l_start = tswapl(target_fl->l_start);
1344         fl.l_len = tswapl(target_fl->l_len);
1345         fl.l_pid = tswapl(target_fl->l_pid);
1346         ret = fcntl(fd, cmd, &fl);
1347         break;
1348
1349     case TARGET_F_GETLK64:
1350     case TARGET_F_SETLK64:
1351     case TARGET_F_SETLKW64:
1352         ret = -1;
1353         errno = EINVAL;
1354         break;
1355
1356     default:
1357         ret = fcntl(fd, cmd, arg);
1358         break;
1359     }
1360     return ret;
1361 }
1362
1363 #ifdef USE_UID16
1364
1365 static inline int high2lowuid(int uid)
1366 {
1367     if (uid > 65535)
1368         return 65534;
1369     else
1370         return uid;
1371 }
1372
1373 static inline int high2lowgid(int gid)
1374 {
1375     if (gid > 65535)
1376         return 65534;
1377     else
1378         return gid;
1379 }
1380
1381 static inline int low2highuid(int uid)
1382 {
1383     if ((int16_t)uid == -1)
1384         return -1;
1385     else
1386         return uid;
1387 }
1388
1389 static inline int low2highgid(int gid)
1390 {
1391     if ((int16_t)gid == -1)
1392         return -1;
1393     else
1394         return gid;
1395 }
1396
1397 #endif /* USE_UID16 */
1398
1399 void syscall_init(void)
1400 {
1401     IOCTLEntry *ie;
1402     const argtype *arg_type;
1403     int size;
1404
1405 #define STRUCT(name, list...) thunk_register_struct(STRUCT_ ## name, #name, struct_ ## name ## _def);
1406 #define STRUCT_SPECIAL(name) thunk_register_struct_direct(STRUCT_ ## name, #name, &struct_ ## name ## _def);
1407 #include "syscall_types.h"
1408 #undef STRUCT
1409 #undef STRUCT_SPECIAL
1410
1411     /* we patch the ioctl size if necessary. We rely on the fact that
1412        no ioctl has all the bits at '1' in the size field */
1413     ie = ioctl_entries;
1414     while (ie->target_cmd != 0) {
1415         if (((ie->target_cmd >> TARGET_IOC_SIZESHIFT) & TARGET_IOC_SIZEMASK) ==
1416             TARGET_IOC_SIZEMASK) {
1417             arg_type = ie->arg_type;
1418             if (arg_type[0] != TYPE_PTR) {
1419                 fprintf(stderr, "cannot patch size for ioctl 0x%x\n",
1420                         ie->target_cmd);
1421                 exit(1);
1422             }
1423             arg_type++;
1424             size = thunk_type_size(arg_type, 0);
1425             ie->target_cmd = (ie->target_cmd &
1426                               ~(TARGET_IOC_SIZEMASK << TARGET_IOC_SIZESHIFT)) |
1427                 (size << TARGET_IOC_SIZESHIFT);
1428         }
1429         /* automatic consistency check if same arch */
1430 #if defined(__i386__) && defined(TARGET_I386)
1431         if (ie->target_cmd != ie->host_cmd) {
1432             fprintf(stderr, "ERROR: ioctl: target=0x%x host=0x%x\n",
1433                     ie->target_cmd, ie->host_cmd);
1434         }
1435 #endif
1436         ie++;
1437     }
1438 }
1439
1440 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
1441                 long arg4, long arg5, long arg6)
1442 {
1443     long ret;
1444     struct stat st;
1445     struct kernel_statfs *stfs;
1446
1447 #ifdef DEBUG
1448     gemu_log("syscall %d", num);
1449 #endif
1450     switch(num) {
1451     case TARGET_NR_exit:
1452 #ifdef HAVE_GPROF
1453         _mcleanup();
1454 #endif
1455         /* XXX: should free thread stack and CPU env */
1456         _exit(arg1);
1457         ret = 0; /* avoid warning */
1458         break;
1459     case TARGET_NR_read:
1460         page_unprotect_range((void *)arg2, arg3);
1461         ret = get_errno(read(arg1, (void *)arg2, arg3));
1462         break;
1463     case TARGET_NR_write:
1464         ret = get_errno(write(arg1, (void *)arg2, arg3));
1465         break;
1466     case TARGET_NR_open:
1467         ret = get_errno(open(path((const char *)arg1), arg2, arg3));
1468         break;
1469     case TARGET_NR_close:
1470         ret = get_errno(close(arg1));
1471         break;
1472     case TARGET_NR_brk:
1473         ret = do_brk((char *)arg1);
1474         break;
1475     case TARGET_NR_fork:
1476         ret = get_errno(do_fork(cpu_env, SIGCHLD, 0));
1477         break;
1478     case TARGET_NR_waitpid:
1479         {
1480             int *status = (int *)arg2;
1481             ret = get_errno(waitpid(arg1, status, arg3));
1482             if (!is_error(ret) && status)
1483                 tswapls((long *)&status);
1484         }
1485         break;
1486     case TARGET_NR_creat:
1487         ret = get_errno(creat((const char *)arg1, arg2));
1488         break;
1489     case TARGET_NR_link:
1490         ret = get_errno(link((const char *)arg1, (const char *)arg2));
1491         break;
1492     case TARGET_NR_unlink:
1493         ret = get_errno(unlink((const char *)arg1));
1494         break;
1495     case TARGET_NR_execve:
1496         {
1497             char **argp, **envp;
1498             int argc, envc;
1499             uint32_t *p;
1500             char **q;
1501
1502             argc = 0;
1503             for (p = (void *)arg2; *p; p++)
1504                 argc++;
1505             envc = 0;
1506             for (p = (void *)arg3; *p; p++)
1507                 envc++;
1508
1509             argp = alloca((argc + 1) * sizeof(void *));
1510             envp = alloca((envc + 1) * sizeof(void *));
1511
1512             for (p = (void *)arg2, q = argp; *p; p++, q++)
1513                 *q = (void *)tswap32(*p);
1514             *q = NULL;
1515
1516             for (p = (void *)arg3, q = envp; *p; p++, q++)
1517                 *q = (void *)tswap32(*p);
1518             *q = NULL;
1519
1520             ret = get_errno(execve((const char *)arg1, argp, envp));
1521         }
1522         break;
1523     case TARGET_NR_chdir:
1524         ret = get_errno(chdir((const char *)arg1));
1525         break;
1526     case TARGET_NR_time:
1527         {
1528             int *time_ptr = (int *)arg1;
1529             ret = get_errno(time((time_t *)time_ptr));
1530             if (!is_error(ret) && time_ptr)
1531                 tswap32s(time_ptr);
1532         }
1533         break;
1534     case TARGET_NR_mknod:
1535         ret = get_errno(mknod((const char *)arg1, arg2, arg3));
1536         break;
1537     case TARGET_NR_chmod:
1538         ret = get_errno(chmod((const char *)arg1, arg2));
1539         break;
1540 #ifdef TARGET_NR_break
1541     case TARGET_NR_break:
1542         goto unimplemented;
1543 #endif
1544 #ifdef TARGET_NR_oldstat
1545     case TARGET_NR_oldstat:
1546         goto unimplemented;
1547 #endif
1548     case TARGET_NR_lseek:
1549         ret = get_errno(lseek(arg1, arg2, arg3));
1550         break;
1551     case TARGET_NR_getpid:
1552         ret = get_errno(getpid());
1553         break;
1554     case TARGET_NR_mount:
1555         /* need to look at the data field */
1556         goto unimplemented;
1557     case TARGET_NR_umount:
1558         ret = get_errno(umount((const char *)arg1));
1559         break;
1560     case TARGET_NR_stime:
1561         {
1562             int *time_ptr = (int *)arg1;
1563             if (time_ptr)
1564                 tswap32s(time_ptr);
1565             ret = get_errno(stime((time_t *)time_ptr));
1566         }
1567         break;
1568     case TARGET_NR_ptrace:
1569         goto unimplemented;
1570     case TARGET_NR_alarm:
1571         ret = alarm(arg1);
1572         break;
1573 #ifdef TARGET_NR_oldfstat
1574     case TARGET_NR_oldfstat:
1575         goto unimplemented;
1576 #endif
1577     case TARGET_NR_pause:
1578         ret = get_errno(pause());
1579         break;
1580     case TARGET_NR_utime:
1581         {
1582             struct utimbuf tbuf;
1583             struct target_utimbuf *target_tbuf = (void *)arg2;
1584             tbuf.actime = tswapl(target_tbuf->actime);
1585             tbuf.modtime = tswapl(target_tbuf->modtime);
1586             ret = get_errno(utime((const char *)arg1, &tbuf));
1587         }
1588         break;
1589 #ifdef TARGET_NR_stty
1590     case TARGET_NR_stty:
1591         goto unimplemented;
1592 #endif
1593 #ifdef TARGET_NR_gtty
1594     case TARGET_NR_gtty:
1595         goto unimplemented;
1596 #endif
1597     case TARGET_NR_access:
1598         ret = get_errno(access((const char *)arg1, arg2));
1599         break;
1600     case TARGET_NR_nice:
1601         ret = get_errno(nice(arg1));
1602         break;
1603 #ifdef TARGET_NR_ftime
1604     case TARGET_NR_ftime:
1605         goto unimplemented;
1606 #endif
1607     case TARGET_NR_sync:
1608         sync();
1609         ret = 0;
1610         break;
1611     case TARGET_NR_kill:
1612         ret = get_errno(kill(arg1, arg2));
1613         break;
1614     case TARGET_NR_rename:
1615         ret = get_errno(rename((const char *)arg1, (const char *)arg2));
1616         break;
1617     case TARGET_NR_mkdir:
1618         ret = get_errno(mkdir((const char *)arg1, arg2));
1619         break;
1620     case TARGET_NR_rmdir:
1621         ret = get_errno(rmdir((const char *)arg1));
1622         break;
1623     case TARGET_NR_dup:
1624         ret = get_errno(dup(arg1));
1625         break;
1626     case TARGET_NR_pipe:
1627         {
1628             int *pipe_ptr = (int *)arg1;
1629             ret = get_errno(pipe(pipe_ptr));
1630             if (!is_error(ret)) {
1631                 tswap32s(&pipe_ptr[0]);
1632                 tswap32s(&pipe_ptr[1]);
1633             }
1634         }
1635         break;
1636     case TARGET_NR_times:
1637         {
1638             struct target_tms *tmsp = (void *)arg1;
1639             struct tms tms;
1640             ret = get_errno(times(&tms));
1641             if (tmsp) {
1642                 tmsp->tms_utime = tswapl(host_to_target_clock_t(tms.tms_utime));
1643                 tmsp->tms_stime = tswapl(host_to_target_clock_t(tms.tms_stime));
1644                 tmsp->tms_cutime = tswapl(host_to_target_clock_t(tms.tms_cutime));
1645                 tmsp->tms_cstime = tswapl(host_to_target_clock_t(tms.tms_cstime));
1646             }
1647             if (!is_error(ret))
1648                 ret = host_to_target_clock_t(ret);
1649         }
1650         break;
1651 #ifdef TARGET_NR_prof
1652     case TARGET_NR_prof:
1653         goto unimplemented;
1654 #endif
1655     case TARGET_NR_signal:
1656         goto unimplemented;
1657
1658     case TARGET_NR_acct:
1659         goto unimplemented;
1660     case TARGET_NR_umount2:
1661         ret = get_errno(umount2((const char *)arg1, arg2));
1662         break;
1663 #ifdef TARGET_NR_lock
1664     case TARGET_NR_lock:
1665         goto unimplemented;
1666 #endif
1667     case TARGET_NR_ioctl:
1668         ret = do_ioctl(arg1, arg2, arg3);
1669         break;
1670     case TARGET_NR_fcntl:
1671         ret = get_errno(do_fcntl(arg1, arg2, arg3));
1672         break;
1673 #ifdef TARGET_NR_mpx
1674     case TARGET_NR_mpx:
1675         goto unimplemented;
1676 #endif
1677     case TARGET_NR_setpgid:
1678         ret = get_errno(setpgid(arg1, arg2));
1679         break;
1680 #ifdef TARGET_NR_ulimit
1681     case TARGET_NR_ulimit:
1682         goto unimplemented;
1683 #endif
1684 #ifdef TARGET_NR_oldolduname
1685     case TARGET_NR_oldolduname:
1686         goto unimplemented;
1687 #endif
1688     case TARGET_NR_umask:
1689         ret = get_errno(umask(arg1));
1690         break;
1691     case TARGET_NR_chroot:
1692         ret = get_errno(chroot((const char *)arg1));
1693         break;
1694     case TARGET_NR_ustat:
1695         goto unimplemented;
1696     case TARGET_NR_dup2:
1697         ret = get_errno(dup2(arg1, arg2));
1698         break;
1699     case TARGET_NR_getppid:
1700         ret = get_errno(getppid());
1701         break;
1702     case TARGET_NR_getpgrp:
1703         ret = get_errno(getpgrp());
1704         break;
1705     case TARGET_NR_setsid:
1706         ret = get_errno(setsid());
1707         break;
1708     case TARGET_NR_sigaction:
1709         {
1710             struct target_old_sigaction *old_act = (void *)arg2;
1711             struct target_old_sigaction *old_oact = (void *)arg3;
1712             struct target_sigaction act, oact, *pact;
1713             if (old_act) {
1714                 act._sa_handler = old_act->_sa_handler;
1715                 target_siginitset(&act.sa_mask, old_act->sa_mask);
1716                 act.sa_flags = old_act->sa_flags;
1717                 act.sa_restorer = old_act->sa_restorer;
1718                 pact = &act;
1719             } else {
1720                 pact = NULL;
1721             }
1722             ret = get_errno(do_sigaction(arg1, pact, &oact));
1723             if (!is_error(ret) && old_oact) {
1724                 old_oact->_sa_handler = oact._sa_handler;
1725                 old_oact->sa_mask = oact.sa_mask.sig[0];
1726                 old_oact->sa_flags = oact.sa_flags;
1727                 old_oact->sa_restorer = oact.sa_restorer;
1728             }
1729         }
1730         break;
1731     case TARGET_NR_rt_sigaction:
1732         ret = get_errno(do_sigaction(arg1, (void *)arg2, (void *)arg3));
1733         break;
1734     case TARGET_NR_sgetmask:
1735         {
1736             sigset_t cur_set;
1737             target_ulong target_set;
1738             sigprocmask(0, NULL, &cur_set);
1739             host_to_target_old_sigset(&target_set, &cur_set);
1740             ret = target_set;
1741         }
1742         break;
1743     case TARGET_NR_ssetmask:
1744         {
1745             sigset_t set, oset, cur_set;
1746             target_ulong target_set = arg1;
1747             sigprocmask(0, NULL, &cur_set);
1748             target_to_host_old_sigset(&set, &target_set);
1749             sigorset(&set, &set, &cur_set);
1750             sigprocmask(SIG_SETMASK, &set, &oset);
1751             host_to_target_old_sigset(&target_set, &oset);
1752             ret = target_set;
1753         }
1754         break;
1755     case TARGET_NR_sigprocmask:
1756         {
1757             int how = arg1;
1758             sigset_t set, oldset, *set_ptr;
1759             target_ulong *pset = (void *)arg2, *poldset = (void *)arg3;
1760
1761             if (pset) {
1762                 switch(how) {
1763                 case TARGET_SIG_BLOCK:
1764                     how = SIG_BLOCK;
1765                     break;
1766                 case TARGET_SIG_UNBLOCK:
1767                     how = SIG_UNBLOCK;
1768                     break;
1769                 case TARGET_SIG_SETMASK:
1770                     how = SIG_SETMASK;
1771                     break;
1772                 default:
1773                     ret = -EINVAL;
1774                     goto fail;
1775                 }
1776                 target_to_host_old_sigset(&set, pset);
1777                 set_ptr = &set;
1778             } else {
1779                 how = 0;
1780                 set_ptr = NULL;
1781             }
1782             ret = get_errno(sigprocmask(arg1, set_ptr, &oldset));
1783             if (!is_error(ret) && poldset) {
1784                 host_to_target_old_sigset(poldset, &oldset);
1785             }
1786         }
1787         break;
1788     case TARGET_NR_rt_sigprocmask:
1789         {
1790             int how = arg1;
1791             sigset_t set, oldset, *set_ptr;
1792             target_sigset_t *pset = (void *)arg2;
1793             target_sigset_t *poldset = (void *)arg3;
1794
1795             if (pset) {
1796                 switch(how) {
1797                 case TARGET_SIG_BLOCK:
1798                     how = SIG_BLOCK;
1799                     break;
1800                 case TARGET_SIG_UNBLOCK:
1801                     how = SIG_UNBLOCK;
1802                     break;
1803                 case TARGET_SIG_SETMASK:
1804                     how = SIG_SETMASK;
1805                     break;
1806                 default:
1807                     ret = -EINVAL;
1808                     goto fail;
1809                 }
1810                 target_to_host_sigset(&set, pset);
1811                 set_ptr = &set;
1812             } else {
1813                 how = 0;
1814                 set_ptr = NULL;
1815             }
1816             ret = get_errno(sigprocmask(how, set_ptr, &oldset));
1817             if (!is_error(ret) && poldset) {
1818                 host_to_target_sigset(poldset, &oldset);
1819             }
1820         }
1821         break;
1822     case TARGET_NR_sigpending:
1823         {
1824             sigset_t set;
1825             ret = get_errno(sigpending(&set));
1826             if (!is_error(ret)) {
1827                 host_to_target_old_sigset((target_ulong *)arg1, &set);
1828             }
1829         }
1830         break;
1831     case TARGET_NR_rt_sigpending:
1832         {
1833             sigset_t set;
1834             ret = get_errno(sigpending(&set));
1835             if (!is_error(ret)) {
1836                 host_to_target_sigset((target_sigset_t *)arg1, &set);
1837             }
1838         }
1839         break;
1840     case TARGET_NR_sigsuspend:
1841         {
1842             sigset_t set;
1843             target_to_host_old_sigset(&set, (target_ulong *)arg1);
1844             ret = get_errno(sigsuspend(&set));
1845         }
1846         break;
1847     case TARGET_NR_rt_sigsuspend:
1848         {
1849             sigset_t set;
1850             target_to_host_sigset(&set, (target_sigset_t *)arg1);
1851             ret = get_errno(sigsuspend(&set));
1852         }
1853         break;
1854     case TARGET_NR_rt_sigtimedwait:
1855         {
1856             target_sigset_t *target_set = (void *)arg1;
1857             target_siginfo_t *target_uinfo = (void *)arg2;
1858             struct target_timespec *target_uts = (void *)arg3;
1859             sigset_t set;
1860             struct timespec uts, *puts;
1861             siginfo_t uinfo;
1862
1863             target_to_host_sigset(&set, target_set);
1864             if (target_uts) {
1865                 puts = &uts;
1866                 puts->tv_sec = tswapl(target_uts->tv_sec);
1867                 puts->tv_nsec = tswapl(target_uts->tv_nsec);
1868             } else {
1869                 puts = NULL;
1870             }
1871             ret = get_errno(sigtimedwait(&set, &uinfo, puts));
1872             if (!is_error(ret) && target_uinfo) {
1873                 host_to_target_siginfo(target_uinfo, &uinfo);
1874             }
1875         }
1876         break;
1877     case TARGET_NR_rt_sigqueueinfo:
1878         {
1879             siginfo_t uinfo;
1880             target_to_host_siginfo(&uinfo, (target_siginfo_t *)arg3);
1881             ret = get_errno(sys_rt_sigqueueinfo(arg1, arg2, &uinfo));
1882         }
1883         break;
1884     case TARGET_NR_sigreturn:
1885         /* NOTE: ret is eax, so not transcoding must be done */
1886         ret = do_sigreturn(cpu_env);
1887         break;
1888     case TARGET_NR_rt_sigreturn:
1889         /* NOTE: ret is eax, so not transcoding must be done */
1890         ret = do_rt_sigreturn(cpu_env);
1891         break;
1892     case TARGET_NR_sethostname:
1893         ret = get_errno(sethostname((const char *)arg1, arg2));
1894         break;
1895     case TARGET_NR_setrlimit:
1896         {
1897             /* XXX: convert resource ? */
1898             int resource = arg1;
1899             struct target_rlimit *target_rlim = (void *)arg2;
1900             struct rlimit rlim;
1901             rlim.rlim_cur = tswapl(target_rlim->rlim_cur);
1902             rlim.rlim_max = tswapl(target_rlim->rlim_max);
1903             ret = get_errno(setrlimit(resource, &rlim));
1904         }
1905         break;
1906     case TARGET_NR_getrlimit:
1907         {
1908             /* XXX: convert resource ? */
1909             int resource = arg1;
1910             struct target_rlimit *target_rlim = (void *)arg2;
1911             struct rlimit rlim;
1912
1913             ret = get_errno(getrlimit(resource, &rlim));
1914             if (!is_error(ret)) {
1915                 target_rlim->rlim_cur = tswapl(rlim.rlim_cur);
1916                 target_rlim->rlim_max = tswapl(rlim.rlim_max);
1917             }
1918         }
1919         break;
1920     case TARGET_NR_getrusage:
1921         {
1922             struct rusage rusage;
1923             struct target_rusage *target_rusage = (void *)arg2;
1924             ret = get_errno(getrusage(arg1, &rusage));
1925             if (!is_error(ret)) {
1926                 host_to_target_rusage(target_rusage, &rusage);
1927             }
1928         }
1929         break;
1930     case TARGET_NR_gettimeofday:
1931         {
1932             struct target_timeval *target_tv = (void *)arg1;
1933             struct timeval tv;
1934             ret = get_errno(gettimeofday(&tv, NULL));
1935             if (!is_error(ret)) {
1936                 host_to_target_timeval(target_tv, &tv);
1937             }
1938         }
1939         break;
1940     case TARGET_NR_settimeofday:
1941         {
1942             struct target_timeval *target_tv = (void *)arg1;
1943             struct timeval tv;
1944             target_to_host_timeval(&tv, target_tv);
1945             ret = get_errno(settimeofday(&tv, NULL));
1946         }
1947         break;
1948     case TARGET_NR_select:
1949         {
1950             struct target_sel_arg_struct *sel = (void *)arg1;
1951             sel->n = tswapl(sel->n);
1952             sel->inp = tswapl(sel->inp);
1953             sel->outp = tswapl(sel->outp);
1954             sel->exp = tswapl(sel->exp);
1955             sel->tvp = tswapl(sel->tvp);
1956             ret = do_select(sel->n, (void *)sel->inp, (void *)sel->outp,
1957                             (void *)sel->exp, (void *)sel->tvp);
1958         }
1959         break;
1960     case TARGET_NR_symlink:
1961         ret = get_errno(symlink((const char *)arg1, (const char *)arg2));
1962         break;
1963 #ifdef TARGET_NR_oldlstat
1964     case TARGET_NR_oldlstat:
1965         goto unimplemented;
1966 #endif
1967     case TARGET_NR_readlink:
1968         ret = get_errno(readlink(path((const char *)arg1), (char *)arg2, arg3));
1969         break;
1970     case TARGET_NR_uselib:
1971         goto unimplemented;
1972     case TARGET_NR_swapon:
1973         ret = get_errno(swapon((const char *)arg1, arg2));
1974         break;
1975     case TARGET_NR_reboot:
1976         goto unimplemented;
1977     case TARGET_NR_readdir:
1978         goto unimplemented;
1979     case TARGET_NR_mmap:
1980 #if defined(TARGET_I386) || defined(TARGET_ARM)
1981         {
1982             uint32_t v1, v2, v3, v4, v5, v6, *vptr;
1983             vptr = (uint32_t *)arg1;
1984             v1 = tswap32(vptr[0]);
1985             v2 = tswap32(vptr[1]);
1986             v3 = tswap32(vptr[2]);
1987             v4 = tswap32(vptr[3]);
1988             v5 = tswap32(vptr[4]);
1989             v6 = tswap32(vptr[5]);
1990             ret = get_errno(target_mmap(v1, v2, v3,
1991                                         target_to_host_bitmask(v4, mmap_flags_tbl),
1992                                         v5, v6));
1993         }
1994 #else
1995         ret = get_errno(target_mmap(arg1, arg2, arg3,
1996                                     target_to_host_bitmask(arg4, mmap_flags_tbl),
1997                                     arg5,
1998                                     arg6));
1999 #endif
2000         break;
2001     case TARGET_NR_mmap2:
2002 #if defined(TARGET_SPARC)
2003 #define MMAP_SHIFT 12
2004 #else
2005 #define MMAP_SHIFT TARGET_PAGE_BITS
2006 #endif
2007         ret = get_errno(target_mmap(arg1, arg2, arg3,
2008                                     target_to_host_bitmask(arg4, mmap_flags_tbl),
2009                                     arg5,
2010                                     arg6 << MMAP_SHIFT));
2011         break;
2012     case TARGET_NR_munmap:
2013         ret = get_errno(target_munmap(arg1, arg2));
2014         break;
2015     case TARGET_NR_mprotect:
2016         ret = get_errno(target_mprotect(arg1, arg2, arg3));
2017         break;
2018     case TARGET_NR_mremap:
2019         ret = get_errno(target_mremap(arg1, arg2, arg3, arg4, arg5));
2020         break;
2021     case TARGET_NR_msync:
2022         ret = get_errno(msync((void *)arg1, arg2, arg3));
2023         break;
2024     case TARGET_NR_mlock:
2025         ret = get_errno(mlock((void *)arg1, arg2));
2026         break;
2027     case TARGET_NR_munlock:
2028         ret = get_errno(munlock((void *)arg1, arg2));
2029         break;
2030     case TARGET_NR_mlockall:
2031         ret = get_errno(mlockall(arg1));
2032         break;
2033     case TARGET_NR_munlockall:
2034         ret = get_errno(munlockall());
2035         break;
2036     case TARGET_NR_truncate:
2037         ret = get_errno(truncate((const char *)arg1, arg2));
2038         break;
2039     case TARGET_NR_ftruncate:
2040         ret = get_errno(ftruncate(arg1, arg2));
2041         break;
2042     case TARGET_NR_fchmod:
2043         ret = get_errno(fchmod(arg1, arg2));
2044         break;
2045     case TARGET_NR_getpriority:
2046         ret = get_errno(getpriority(arg1, arg2));
2047         break;
2048     case TARGET_NR_setpriority:
2049         ret = get_errno(setpriority(arg1, arg2, arg3));
2050         break;
2051 #ifdef TARGET_NR_profil
2052     case TARGET_NR_profil:
2053         goto unimplemented;
2054 #endif
2055     case TARGET_NR_statfs:
2056         stfs = (void *)arg2;
2057         ret = get_errno(sys_statfs(path((const char *)arg1), stfs));
2058     convert_statfs:
2059         if (!is_error(ret)) {
2060             tswap32s(&stfs->f_type);
2061             tswap32s(&stfs->f_bsize);
2062             tswap32s(&stfs->f_blocks);
2063             tswap32s(&stfs->f_bfree);
2064             tswap32s(&stfs->f_bavail);
2065             tswap32s(&stfs->f_files);
2066             tswap32s(&stfs->f_ffree);
2067             tswap32s(&stfs->f_fsid.val[0]);
2068             tswap32s(&stfs->f_fsid.val[1]);
2069             tswap32s(&stfs->f_namelen);
2070         }
2071         break;
2072     case TARGET_NR_fstatfs:
2073         stfs = (void *)arg2;
2074         ret = get_errno(sys_fstatfs(arg1, stfs));
2075         goto convert_statfs;
2076 #ifdef TARGET_NR_ioperm
2077     case TARGET_NR_ioperm:
2078         goto unimplemented;
2079 #endif
2080     case TARGET_NR_socketcall:
2081         ret = do_socketcall(arg1, (int32_t *)arg2);
2082         break;
2083     case TARGET_NR_syslog:
2084         goto unimplemented;
2085     case TARGET_NR_setitimer:
2086         {
2087             struct target_itimerval *target_value = (void *)arg2;
2088             struct target_itimerval *target_ovalue = (void *)arg3;
2089             struct itimerval value, ovalue, *pvalue;
2090
2091             if (target_value) {
2092                 pvalue = &value;
2093                 target_to_host_timeval(&pvalue->it_interval,
2094                                        &target_value->it_interval);
2095                 target_to_host_timeval(&pvalue->it_value,
2096                                        &target_value->it_value);
2097             } else {
2098                 pvalue = NULL;
2099             }
2100             ret = get_errno(setitimer(arg1, pvalue, &ovalue));
2101             if (!is_error(ret) && target_ovalue) {
2102                 host_to_target_timeval(&target_ovalue->it_interval,
2103                                        &ovalue.it_interval);
2104                 host_to_target_timeval(&target_ovalue->it_value,
2105                                        &ovalue.it_value);
2106             }
2107         }
2108         break;
2109     case TARGET_NR_getitimer:
2110         {
2111             struct target_itimerval *target_value = (void *)arg2;
2112             struct itimerval value;
2113
2114             ret = get_errno(getitimer(arg1, &value));
2115             if (!is_error(ret) && target_value) {
2116                 host_to_target_timeval(&target_value->it_interval,
2117                                        &value.it_interval);
2118                 host_to_target_timeval(&target_value->it_value,
2119                                        &value.it_value);
2120             }
2121         }
2122         break;
2123     case TARGET_NR_stat:
2124         ret = get_errno(stat(path((const char *)arg1), &st));
2125         goto do_stat;
2126     case TARGET_NR_lstat:
2127         ret = get_errno(lstat(path((const char *)arg1), &st));
2128         goto do_stat;
2129     case TARGET_NR_fstat:
2130         {
2131             ret = get_errno(fstat(arg1, &st));
2132         do_stat:
2133             if (!is_error(ret)) {
2134                 struct target_stat *target_st = (void *)arg2;
2135                 target_st->st_dev = tswap16(st.st_dev);
2136                 target_st->st_ino = tswapl(st.st_ino);
2137 #if defined(TARGET_PPC)
2138                 target_st->st_mode = tswapl(st.st_mode); /* XXX: check this */
2139                 target_st->st_uid = tswap32(st.st_uid);
2140                 target_st->st_gid = tswap32(st.st_gid);
2141 #else
2142                 target_st->st_mode = tswap16(st.st_mode);
2143                 target_st->st_uid = tswap16(st.st_uid);
2144                 target_st->st_gid = tswap16(st.st_gid);
2145 #endif
2146                 target_st->st_nlink = tswap16(st.st_nlink);
2147                 target_st->st_rdev = tswap16(st.st_rdev);
2148                 target_st->st_size = tswapl(st.st_size);
2149                 target_st->st_blksize = tswapl(st.st_blksize);
2150                 target_st->st_blocks = tswapl(st.st_blocks);
2151                 target_st->target_st_atime = tswapl(st.st_atime);
2152                 target_st->target_st_mtime = tswapl(st.st_mtime);
2153                 target_st->target_st_ctime = tswapl(st.st_ctime);
2154             }
2155         }
2156         break;
2157 #ifdef TARGET_NR_olduname
2158     case TARGET_NR_olduname:
2159         goto unimplemented;
2160 #endif
2161 #ifdef TARGET_NR_iopl
2162     case TARGET_NR_iopl:
2163         goto unimplemented;
2164 #endif
2165     case TARGET_NR_vhangup:
2166         ret = get_errno(vhangup());
2167         break;
2168 #ifdef TARGET_NR_idle
2169     case TARGET_NR_idle:
2170         goto unimplemented;
2171 #endif
2172     case TARGET_NR_wait4:
2173         {
2174             int status;
2175             target_long *status_ptr = (void *)arg2;
2176             struct rusage rusage, *rusage_ptr;
2177             struct target_rusage *target_rusage = (void *)arg4;
2178             if (target_rusage)
2179                 rusage_ptr = &rusage;
2180             else
2181                 rusage_ptr = NULL;
2182             ret = get_errno(wait4(arg1, &status, arg3, rusage_ptr));
2183             if (!is_error(ret)) {
2184                 if (status_ptr)
2185                     *status_ptr = tswap32(status);
2186                 if (target_rusage) {
2187                     host_to_target_rusage(target_rusage, &rusage);
2188                 }
2189             }
2190         }
2191         break;
2192     case TARGET_NR_swapoff:
2193         ret = get_errno(swapoff((const char *)arg1));
2194         break;
2195     case TARGET_NR_sysinfo:
2196         goto unimplemented;
2197     case TARGET_NR_ipc:
2198         goto unimplemented;
2199     case TARGET_NR_fsync:
2200         ret = get_errno(fsync(arg1));
2201         break;
2202     case TARGET_NR_clone:
2203         ret = get_errno(do_fork(cpu_env, arg1, arg2));
2204         break;
2205 #ifdef __NR_exit_group
2206         /* new thread calls */
2207     case TARGET_NR_exit_group:
2208         ret = get_errno(exit_group(arg1));
2209         break;
2210 #endif
2211     case TARGET_NR_setdomainname:
2212         ret = get_errno(setdomainname((const char *)arg1, arg2));
2213         break;
2214     case TARGET_NR_uname:
2215         /* no need to transcode because we use the linux syscall */
2216         ret = get_errno(sys_uname((struct new_utsname *)arg1));
2217         break;
2218 #ifdef TARGET_I386
2219     case TARGET_NR_modify_ldt:
2220         ret = get_errno(do_modify_ldt(cpu_env, arg1, (void *)arg2, arg3));
2221         break;
2222     case TARGET_NR_vm86old:
2223         goto unimplemented;
2224     case TARGET_NR_vm86:
2225         ret = do_vm86(cpu_env, arg1, (void *)arg2);
2226         break;
2227 #endif
2228     case TARGET_NR_adjtimex:
2229         goto unimplemented;
2230     case TARGET_NR_create_module:
2231     case TARGET_NR_init_module:
2232     case TARGET_NR_delete_module:
2233     case TARGET_NR_get_kernel_syms:
2234         goto unimplemented;
2235     case TARGET_NR_quotactl:
2236         goto unimplemented;
2237     case TARGET_NR_getpgid:
2238         ret = get_errno(getpgid(arg1));
2239         break;
2240     case TARGET_NR_fchdir:
2241         ret = get_errno(fchdir(arg1));
2242         break;
2243     case TARGET_NR_bdflush:
2244         goto unimplemented;
2245     case TARGET_NR_sysfs:
2246         goto unimplemented;
2247     case TARGET_NR_personality:
2248         ret = get_errno(personality(arg1));
2249         break;
2250     case TARGET_NR_afs_syscall:
2251         goto unimplemented;
2252     case TARGET_NR__llseek:
2253         {
2254             int64_t res;
2255             ret = get_errno(_llseek(arg1, arg2, arg3, &res, arg5));
2256             *(int64_t *)arg4 = tswap64(res);
2257         }
2258         break;
2259     case TARGET_NR_getdents:
2260 #if TARGET_LONG_SIZE != 4
2261 #error not supported
2262 #elif TARGET_LONG_SIZE == 4 && HOST_LONG_SIZE == 8
2263         {
2264             struct target_dirent *target_dirp = (void *)arg2;
2265             struct dirent *dirp;
2266             long count = arg3;
2267
2268             dirp = malloc(count);
2269             if (!dirp)
2270                 return -ENOMEM;
2271
2272             ret = get_errno(sys_getdents(arg1, dirp, count));
2273             if (!is_error(ret)) {
2274                 struct dirent *de;
2275                 struct target_dirent *tde;
2276                 int len = ret;
2277                 int reclen, treclen;
2278                 int count1, tnamelen;
2279
2280                 count1 = 0;
2281                 de = dirp;
2282                 tde = target_dirp;
2283                 while (len > 0) {
2284                     reclen = de->d_reclen;
2285                     treclen = reclen - (2 * (sizeof(long) - sizeof(target_long)));
2286                     tde->d_reclen = tswap16(treclen);
2287                     tde->d_ino = tswapl(de->d_ino);
2288                     tde->d_off = tswapl(de->d_off);
2289                     tnamelen = treclen - (2 * sizeof(target_long) + 2);
2290                     if (tnamelen > 256)
2291                         tnamelen = 256;
2292                     strncpy(tde->d_name, de->d_name, tnamelen);
2293                     de = (struct dirent *)((char *)de + reclen);
2294                     len -= reclen;
2295                     tde = (struct dirent *)((char *)tde + treclen);
2296                     count1 += treclen;
2297                 }
2298                 ret = count1;
2299             }
2300             free(dirp);
2301         }
2302 #else
2303         {
2304             struct dirent *dirp = (void *)arg2;
2305             long count = arg3;
2306
2307             ret = get_errno(sys_getdents(arg1, dirp, count));
2308             if (!is_error(ret)) {
2309                 struct dirent *de;
2310                 int len = ret;
2311                 int reclen;
2312                 de = dirp;
2313                 while (len > 0) {
2314                     reclen = de->d_reclen;
2315                     if (reclen > len)
2316                         break;
2317                     de->d_reclen = tswap16(reclen);
2318                     tswapls(&de->d_ino);
2319                     tswapls(&de->d_off);
2320                     de = (struct dirent *)((char *)de + reclen);
2321                     len -= reclen;
2322                 }
2323             }
2324         }
2325 #endif
2326         break;
2327     case TARGET_NR_getdents64:
2328         {
2329             struct dirent64 *dirp = (void *)arg2;
2330             long count = arg3;
2331             ret = get_errno(sys_getdents64(arg1, dirp, count));
2332             if (!is_error(ret)) {
2333                 struct dirent64 *de;
2334                 int len = ret;
2335                 int reclen;
2336                 de = dirp;
2337                 while (len > 0) {
2338                     reclen = de->d_reclen;
2339                     if (reclen > len)
2340                         break;
2341                     de->d_reclen = tswap16(reclen);
2342                     tswap64s(&de->d_ino);
2343                     tswap64s(&de->d_off);
2344                     de = (struct dirent64 *)((char *)de + reclen);
2345                     len -= reclen;
2346                 }
2347             }
2348         }
2349         break;
2350     case TARGET_NR__newselect:
2351         ret = do_select(arg1, (void *)arg2, (void *)arg3, (void *)arg4,
2352                         (void *)arg5);
2353         break;
2354     case TARGET_NR_poll:
2355         {
2356             struct target_pollfd *target_pfd = (void *)arg1;
2357             unsigned int nfds = arg2;
2358             int timeout = arg3;
2359             struct pollfd *pfd;
2360             unsigned int i;
2361
2362             pfd = alloca(sizeof(struct pollfd) * nfds);
2363             for(i = 0; i < nfds; i++) {
2364                 pfd[i].fd = tswap32(target_pfd[i].fd);
2365                 pfd[i].events = tswap16(target_pfd[i].events);
2366             }
2367             ret = get_errno(poll(pfd, nfds, timeout));
2368             if (!is_error(ret)) {
2369                 for(i = 0; i < nfds; i++) {
2370                     target_pfd[i].revents = tswap16(pfd[i].revents);
2371                 }
2372             }
2373         }
2374         break;
2375     case TARGET_NR_flock:
2376         /* NOTE: the flock constant seems to be the same for every
2377            Linux platform */
2378         ret = get_errno(flock(arg1, arg2));
2379         break;
2380     case TARGET_NR_readv:
2381         {
2382             int count = arg3;
2383             int i;
2384             struct iovec *vec;
2385             struct target_iovec *target_vec = (void *)arg2;
2386
2387             vec = alloca(count * sizeof(struct iovec));
2388             for(i = 0;i < count; i++) {
2389                 vec[i].iov_base = (void *)tswapl(target_vec[i].iov_base);
2390                 vec[i].iov_len = tswapl(target_vec[i].iov_len);
2391             }
2392             ret = get_errno(readv(arg1, vec, count));
2393         }
2394         break;
2395     case TARGET_NR_writev:
2396         {
2397             int count = arg3;
2398             int i;
2399             struct iovec *vec;
2400             struct target_iovec *target_vec = (void *)arg2;
2401
2402             vec = alloca(count * sizeof(struct iovec));
2403             for(i = 0;i < count; i++) {
2404                 vec[i].iov_base = (void *)tswapl(target_vec[i].iov_base);
2405                 vec[i].iov_len = tswapl(target_vec[i].iov_len);
2406             }
2407             ret = get_errno(writev(arg1, vec, count));
2408         }
2409         break;
2410     case TARGET_NR_getsid:
2411         ret = get_errno(getsid(arg1));
2412         break;
2413     case TARGET_NR_fdatasync:
2414         ret = get_errno(fdatasync(arg1));
2415         break;
2416     case TARGET_NR__sysctl:
2417         goto unimplemented;
2418     case TARGET_NR_sched_setparam:
2419         {
2420             struct sched_param *target_schp = (void *)arg2;
2421             struct sched_param schp;
2422             schp.sched_priority = tswap32(target_schp->sched_priority);
2423             ret = get_errno(sched_setparam(arg1, &schp));
2424         }
2425         break;
2426     case TARGET_NR_sched_getparam:
2427         {
2428             struct sched_param *target_schp = (void *)arg2;
2429             struct sched_param schp;
2430             ret = get_errno(sched_getparam(arg1, &schp));
2431             if (!is_error(ret)) {
2432                 target_schp->sched_priority = tswap32(schp.sched_priority);
2433             }
2434         }
2435         break;
2436     case TARGET_NR_sched_setscheduler:
2437         {
2438             struct sched_param *target_schp = (void *)arg3;
2439             struct sched_param schp;
2440             schp.sched_priority = tswap32(target_schp->sched_priority);
2441             ret = get_errno(sched_setscheduler(arg1, arg2, &schp));
2442         }
2443         break;
2444     case TARGET_NR_sched_getscheduler:
2445         ret = get_errno(sched_getscheduler(arg1));
2446         break;
2447     case TARGET_NR_sched_yield:
2448         ret = get_errno(sched_yield());
2449         break;
2450     case TARGET_NR_sched_get_priority_max:
2451         ret = get_errno(sched_get_priority_max(arg1));
2452         break;
2453     case TARGET_NR_sched_get_priority_min:
2454         ret = get_errno(sched_get_priority_min(arg1));
2455         break;
2456     case TARGET_NR_sched_rr_get_interval:
2457         {
2458             struct target_timespec *target_ts = (void *)arg2;
2459             struct timespec ts;
2460             ret = get_errno(sched_rr_get_interval(arg1, &ts));
2461             if (!is_error(ret)) {
2462                 target_ts->tv_sec = tswapl(ts.tv_sec);
2463                 target_ts->tv_nsec = tswapl(ts.tv_nsec);
2464             }
2465         }
2466         break;
2467     case TARGET_NR_nanosleep:
2468         {
2469             struct target_timespec *target_req = (void *)arg1;
2470             struct target_timespec *target_rem = (void *)arg2;
2471             struct timespec req, rem;
2472             req.tv_sec = tswapl(target_req->tv_sec);
2473             req.tv_nsec = tswapl(target_req->tv_nsec);
2474             ret = get_errno(nanosleep(&req, &rem));
2475             if (is_error(ret) && target_rem) {
2476                 target_rem->tv_sec = tswapl(rem.tv_sec);
2477                 target_rem->tv_nsec = tswapl(rem.tv_nsec);
2478             }
2479         }
2480         break;
2481     case TARGET_NR_query_module:
2482         goto unimplemented;
2483     case TARGET_NR_nfsservctl:
2484         goto unimplemented;
2485     case TARGET_NR_prctl:
2486         goto unimplemented;
2487 #ifdef TARGET_NR_pread
2488     case TARGET_NR_pread:
2489         page_unprotect_range((void *)arg2, arg3);
2490         ret = get_errno(pread(arg1, (void *)arg2, arg3, arg4));
2491         break;
2492     case TARGET_NR_pwrite:
2493         ret = get_errno(pwrite(arg1, (void *)arg2, arg3, arg4));
2494         break;
2495 #endif
2496     case TARGET_NR_getcwd:
2497         ret = get_errno(sys_getcwd1((char *)arg1, arg2));
2498         break;
2499     case TARGET_NR_capget:
2500         goto unimplemented;
2501     case TARGET_NR_capset:
2502         goto unimplemented;
2503     case TARGET_NR_sigaltstack:
2504         goto unimplemented;
2505     case TARGET_NR_sendfile:
2506         goto unimplemented;
2507 #ifdef TARGET_NR_getpmsg
2508     case TARGET_NR_getpmsg:
2509         goto unimplemented;
2510 #endif
2511 #ifdef TARGET_NR_putpmsg
2512     case TARGET_NR_putpmsg:
2513         goto unimplemented;
2514 #endif
2515     case TARGET_NR_vfork:
2516         ret = get_errno(do_fork(cpu_env, CLONE_VFORK | CLONE_VM | SIGCHLD, 0));
2517         break;
2518 #ifdef TARGET_NR_ugetrlimit
2519     case TARGET_NR_ugetrlimit:
2520     {
2521         struct rlimit rlim;
2522         ret = get_errno(getrlimit(arg1, &rlim));
2523         if (!is_error(ret)) {
2524             struct target_rlimit *target_rlim = (void *)arg2;
2525             target_rlim->rlim_cur = tswapl(rlim.rlim_cur);
2526             target_rlim->rlim_max = tswapl(rlim.rlim_max);
2527         }
2528         break;
2529     }
2530 #endif
2531     case TARGET_NR_truncate64:
2532         goto unimplemented;
2533     case TARGET_NR_ftruncate64:
2534         goto unimplemented;
2535     case TARGET_NR_stat64:
2536         ret = get_errno(stat(path((const char *)arg1), &st));
2537         goto do_stat64;
2538     case TARGET_NR_lstat64:
2539         ret = get_errno(lstat(path((const char *)arg1), &st));
2540         goto do_stat64;
2541     case TARGET_NR_fstat64:
2542         {
2543             ret = get_errno(fstat(arg1, &st));
2544         do_stat64:
2545             if (!is_error(ret)) {
2546                 struct target_stat64 *target_st = (void *)arg2;
2547                 memset(target_st, 0, sizeof(struct target_stat64));
2548                 put_user(st.st_dev, &target_st->st_dev);
2549                 put_user(st.st_ino, &target_st->st_ino);
2550 #ifdef TARGET_STAT64_HAS_BROKEN_ST_INO
2551                 put_user(st.st_ino, &target_st->__st_ino);
2552 #endif
2553                 put_user(st.st_mode, &target_st->st_mode);
2554                 put_user(st.st_nlink, &target_st->st_nlink);
2555                 put_user(st.st_uid, &target_st->st_uid);
2556                 put_user(st.st_gid, &target_st->st_gid);
2557                 put_user(st.st_rdev, &target_st->st_rdev);
2558                 /* XXX: better use of kernel struct */
2559                 put_user(st.st_size, &target_st->st_size);
2560                 put_user(st.st_blksize, &target_st->st_blksize);
2561                 put_user(st.st_blocks, &target_st->st_blocks);
2562                 put_user(st.st_atime, &target_st->target_st_atime);
2563                 put_user(st.st_mtime, &target_st->target_st_mtime);
2564                 put_user(st.st_ctime, &target_st->target_st_ctime);
2565             }
2566         }
2567         break;
2568
2569 #ifdef USE_UID16
2570     case TARGET_NR_lchown:
2571         ret = get_errno(lchown((const char *)arg1, low2highuid(arg2), low2highgid(arg3)));
2572         break;
2573     case TARGET_NR_getuid:
2574         ret = get_errno(high2lowuid(getuid()));
2575         break;
2576     case TARGET_NR_getgid:
2577         ret = get_errno(high2lowgid(getgid()));
2578         break;
2579     case TARGET_NR_geteuid:
2580         ret = get_errno(high2lowuid(geteuid()));
2581         break;
2582     case TARGET_NR_getegid:
2583         ret = get_errno(high2lowgid(getegid()));
2584         break;
2585     case TARGET_NR_setreuid:
2586         ret = get_errno(setreuid(low2highuid(arg1), low2highuid(arg2)));
2587         break;
2588     case TARGET_NR_setregid:
2589         ret = get_errno(setregid(low2highgid(arg1), low2highgid(arg2)));
2590         break;
2591     case TARGET_NR_getgroups:
2592         {
2593             int gidsetsize = arg1;
2594             uint16_t *target_grouplist = (void *)arg2;
2595             gid_t *grouplist;
2596             int i;
2597
2598             grouplist = alloca(gidsetsize * sizeof(gid_t));
2599             ret = get_errno(getgroups(gidsetsize, grouplist));
2600             if (!is_error(ret)) {
2601                 for(i = 0;i < gidsetsize; i++)
2602                     target_grouplist[i] = tswap16(grouplist[i]);
2603             }
2604         }
2605         break;
2606     case TARGET_NR_setgroups:
2607         {
2608             int gidsetsize = arg1;
2609             uint16_t *target_grouplist = (void *)arg2;
2610             gid_t *grouplist;
2611             int i;
2612
2613             grouplist = alloca(gidsetsize * sizeof(gid_t));
2614             for(i = 0;i < gidsetsize; i++)
2615                 grouplist[i] = tswap16(target_grouplist[i]);
2616             ret = get_errno(setgroups(gidsetsize, grouplist));
2617         }
2618         break;
2619     case TARGET_NR_fchown:
2620         ret = get_errno(fchown(arg1, low2highuid(arg2), low2highgid(arg3)));
2621         break;
2622 #ifdef TARGET_NR_setresuid
2623     case TARGET_NR_setresuid:
2624         ret = get_errno(setresuid(low2highuid(arg1),
2625                                   low2highuid(arg2),
2626                                   low2highuid(arg3)));
2627         break;
2628 #endif
2629 #ifdef TARGET_NR_getresuid
2630     case TARGET_NR_getresuid:
2631         {
2632             int ruid, euid, suid;
2633             ret = get_errno(getresuid(&ruid, &euid, &suid));
2634             if (!is_error(ret)) {
2635                 *(uint16_t *)arg1 = tswap16(high2lowuid(ruid));
2636                 *(uint16_t *)arg2 = tswap16(high2lowuid(euid));
2637                 *(uint16_t *)arg3 = tswap16(high2lowuid(suid));
2638             }
2639         }
2640         break;
2641 #endif
2642 #ifdef TARGET_NR_getresgid
2643     case TARGET_NR_setresgid:
2644         ret = get_errno(setresgid(low2highgid(arg1),
2645                                   low2highgid(arg2),
2646                                   low2highgid(arg3)));
2647         break;
2648 #endif
2649 #ifdef TARGET_NR_getresgid
2650     case TARGET_NR_getresgid:
2651         {
2652             int rgid, egid, sgid;
2653             ret = get_errno(getresgid(&rgid, &egid, &sgid));
2654             if (!is_error(ret)) {
2655                 *(uint16_t *)arg1 = tswap16(high2lowgid(rgid));
2656                 *(uint16_t *)arg2 = tswap16(high2lowgid(egid));
2657                 *(uint16_t *)arg3 = tswap16(high2lowgid(sgid));
2658             }
2659         }
2660         break;
2661 #endif
2662     case TARGET_NR_chown:
2663         ret = get_errno(chown((const char *)arg1, low2highuid(arg2), low2highgid(arg3)));
2664         break;
2665     case TARGET_NR_setuid:
2666         ret = get_errno(setuid(low2highuid(arg1)));
2667         break;
2668     case TARGET_NR_setgid:
2669         ret = get_errno(setgid(low2highgid(arg1)));
2670         break;
2671     case TARGET_NR_setfsuid:
2672         ret = get_errno(setfsuid(arg1));
2673         break;
2674     case TARGET_NR_setfsgid:
2675         ret = get_errno(setfsgid(arg1));
2676         break;
2677 #endif /* USE_UID16 */
2678
2679     case TARGET_NR_lchown32:
2680         ret = get_errno(lchown((const char *)arg1, arg2, arg3));
2681         break;
2682     case TARGET_NR_getuid32:
2683         ret = get_errno(getuid());
2684         break;
2685     case TARGET_NR_getgid32:
2686         ret = get_errno(getgid());
2687         break;
2688     case TARGET_NR_geteuid32:
2689         ret = get_errno(geteuid());
2690         break;
2691     case TARGET_NR_getegid32:
2692         ret = get_errno(getegid());
2693         break;
2694     case TARGET_NR_setreuid32:
2695         ret = get_errno(setreuid(arg1, arg2));
2696         break;
2697     case TARGET_NR_setregid32:
2698         ret = get_errno(setregid(arg1, arg2));
2699         break;
2700     case TARGET_NR_getgroups32:
2701         goto unimplemented;
2702     case TARGET_NR_setgroups32:
2703         goto unimplemented;
2704     case TARGET_NR_fchown32:
2705         ret = get_errno(fchown(arg1, arg2, arg3));
2706         break;
2707     case TARGET_NR_setresuid32:
2708         ret = get_errno(setresuid(arg1, arg2, arg3));
2709         break;
2710     case TARGET_NR_getresuid32:
2711         {
2712             int ruid, euid, suid;
2713             ret = get_errno(getresuid(&ruid, &euid, &suid));
2714             if (!is_error(ret)) {
2715                 *(uint32_t *)arg1 = tswap32(ruid);
2716                 *(uint32_t *)arg2 = tswap32(euid);
2717                 *(uint32_t *)arg3 = tswap32(suid);
2718             }
2719         }
2720         break;
2721     case TARGET_NR_setresgid32:
2722         ret = get_errno(setresgid(arg1, arg2, arg3));
2723         break;
2724     case TARGET_NR_getresgid32:
2725         {
2726             int rgid, egid, sgid;
2727             ret = get_errno(getresgid(&rgid, &egid, &sgid));
2728             if (!is_error(ret)) {
2729                 *(uint32_t *)arg1 = tswap32(rgid);
2730                 *(uint32_t *)arg2 = tswap32(egid);
2731                 *(uint32_t *)arg3 = tswap32(sgid);
2732             }
2733         }
2734         break;
2735     case TARGET_NR_chown32:
2736         ret = get_errno(chown((const char *)arg1, arg2, arg3));
2737         break;
2738     case TARGET_NR_setuid32:
2739         ret = get_errno(setuid(arg1));
2740         break;
2741     case TARGET_NR_setgid32:
2742         ret = get_errno(setgid(arg1));
2743         break;
2744     case TARGET_NR_setfsuid32:
2745         ret = get_errno(setfsuid(arg1));
2746         break;
2747     case TARGET_NR_setfsgid32:
2748         ret = get_errno(setfsgid(arg1));
2749         break;
2750
2751     case TARGET_NR_pivot_root:
2752         goto unimplemented;
2753     case TARGET_NR_mincore:
2754         goto unimplemented;
2755     case TARGET_NR_madvise:
2756         goto unimplemented;
2757 #if TARGET_LONG_BITS == 32
2758     case TARGET_NR_fcntl64:
2759     {
2760         struct flock64 fl;
2761         struct target_flock64 *target_fl = (void *)arg3;
2762
2763         switch(arg2) {
2764         case F_GETLK64:
2765             ret = get_errno(fcntl(arg1, arg2, &fl));
2766             if (ret == 0) {
2767                 target_fl->l_type = tswap16(fl.l_type);
2768                 target_fl->l_whence = tswap16(fl.l_whence);
2769                 target_fl->l_start = tswap64(fl.l_start);
2770                 target_fl->l_len = tswap64(fl.l_len);
2771                 target_fl->l_pid = tswapl(fl.l_pid);
2772             }
2773             break;
2774
2775         case F_SETLK64:
2776         case F_SETLKW64:
2777             fl.l_type = tswap16(target_fl->l_type);
2778             fl.l_whence = tswap16(target_fl->l_whence);
2779             fl.l_start = tswap64(target_fl->l_start);
2780             fl.l_len = tswap64(target_fl->l_len);
2781             fl.l_pid = tswapl(target_fl->l_pid);
2782             ret = get_errno(fcntl(arg1, arg2, &fl));
2783             break;
2784         default:
2785             ret = get_errno(do_fcntl(arg1, arg2, arg3));
2786             break;
2787         }
2788         break;
2789     }
2790 #endif
2791 #ifdef TARGET_NR_security
2792     case TARGET_NR_security:
2793         goto unimplemented;
2794 #endif
2795 #ifdef TARGET_NR_getpagesize
2796     case TARGET_NR_getpagesize:
2797         ret = TARGET_PAGE_SIZE;
2798         break;
2799 #endif
2800     case TARGET_NR_gettid:
2801         ret = get_errno(gettid());
2802         break;
2803     case TARGET_NR_readahead:
2804         goto unimplemented;
2805 #ifdef TARGET_NR_setxattr
2806     case TARGET_NR_setxattr:
2807     case TARGET_NR_lsetxattr:
2808     case TARGET_NR_fsetxattr:
2809     case TARGET_NR_getxattr:
2810     case TARGET_NR_lgetxattr:
2811     case TARGET_NR_fgetxattr:
2812     case TARGET_NR_listxattr:
2813     case TARGET_NR_llistxattr:
2814     case TARGET_NR_flistxattr:
2815     case TARGET_NR_removexattr:
2816     case TARGET_NR_lremovexattr:
2817     case TARGET_NR_fremovexattr:
2818         goto unimplemented_nowarn;
2819 #endif
2820 #ifdef TARGET_NR_set_thread_area
2821     case TARGET_NR_set_thread_area:
2822     case TARGET_NR_get_thread_area:
2823         goto unimplemented_nowarn;
2824 #endif
2825     default:
2826     unimplemented:
2827         gemu_log("qemu: Unsupported syscall: %d\n", num);
2828     unimplemented_nowarn:
2829         ret = -ENOSYS;
2830         break;
2831     }
2832  fail:
2833 #ifdef DEBUG
2834     gemu_log(" = %ld\n", ret);
2835 #endif
2836     return ret;
2837 }
2838