/*

 *  Linux syscalls

 *

 *  Copyright (c) 2003 Fabrice Bellard

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#include <stdlib.h>

#include <stdio.h>

#include <stdarg.h>

#include <string.h>

#include <elf.h>

#include <endian.h>

#include <errno.h>

#include <unistd.h>

#include <fcntl.h>

#include <time.h>

#include <limits.h>

#include <sys/types.h>

#include <sys/ipc.h>

#include <sys/msg.h>

#include <sys/wait.h>

#include <sys/time.h>

#include <sys/stat.h>

#include <sys/mount.h>

#include <sys/prctl.h>

#include <sys/resource.h>

#include <sys/mman.h>

#include <sys/swap.h>

#include <signal.h>

#include <sched.h>

#include <sys/socket.h>

#include <sys/uio.h>

#include <sys/poll.h>

#include <sys/times.h>

#include <sys/shm.h>

#include <sys/sem.h>

#include <sys/statfs.h>

#include <utime.h>

#include <sys/sysinfo.h>

//#include <sys/user.h>

#include <netinet/ip.h>

#include <netinet/tcp.h>

#include <qemu-common.h>

#ifdef HAVE_GPROF

#include <sys/gmon.h>

#endif

#define termios host_termios

#define winsize host_winsize

#define termio host_termio

#define sgttyb host_sgttyb /* same as target */

#define tchars host_tchars /* same as target */

#define ltchars host_ltchars /* same as target */

#include <linux/termios.h>

#include <linux/unistd.h>

#include <linux/utsname.h>

#include <linux/cdrom.h>

#include <linux/hdreg.h>

#include <linux/soundcard.h>

#include <linux/kd.h>

#include <linux/mtio.h>

#include "linux_loop.h"

#include "qemu.h"

#include "qemu-common.h"

#if defined(USE_NPTL)

#include <linux/futex.h>

#define CLONE_NPTL_FLAGS2 (CLONE_SETTLS | \

    CLONE_PARENT_SETTID | CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)

#else

/* XXX: Hardcode the above values.  */

#define CLONE_NPTL_FLAGS2 0

#endif

//#define DEBUG

#ifdef USE_NPTL

#define CLONE_NPTL_FLAGS2 (CLONE_SETTLS | \

    CLONE_PARENT_SETTID | CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)

#else

/* XXX: Hardcode the above values.  */

#define CLONE_NPTL_FLAGS2 0

#endif

#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SPARC) \

    || defined(TARGET_M68K) || defined(TARGET_SH4) || defined(TARGET_CRIS)

/* 16 bit uid wrappers emulation */

#define USE_UID16

#endif

//#include <linux/msdos_fs.h>

#define	VFAT_IOCTL_READDIR_BOTH		_IOR('r', 1, struct linux_dirent [2])

#define	VFAT_IOCTL_READDIR_SHORT	_IOR('r', 2, struct linux_dirent [2])

#define TARGET_PROT_GROWSDOWN 0x01000000

#undef _syscall0

#undef _syscall1

#undef _syscall2

#undef _syscall3

#undef _syscall4

#undef _syscall5

#undef _syscall6

#define _syscall0(type,name)		\

static type name (void)			\

{					\

	return syscall(__NR_##name);	\

}

#define _syscall1(type,name,type1,arg1)		\

static type name (type1 arg1)			\

{						\

	return syscall(__NR_##name, arg1);	\

}

#define _syscall2(type,name,type1,arg1,type2,arg2)	\

static type name (type1 arg1,type2 arg2)		\

{							\

	return syscall(__NR_##name, arg1, arg2);	\

}

#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)	\

static type name (type1 arg1,type2 arg2,type3 arg3)		\

{								\

	return syscall(__NR_##name, arg1, arg2, arg3);		\

}

#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)	\

static type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4)			\

{										\

	return syscall(__NR_##name, arg1, arg2, arg3, arg4);			\

}

#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,	\

		  type5,arg5)							\

static type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5)	\

{										\

	return syscall(__NR_##name, arg1, arg2, arg3, arg4, arg5);		\

}

#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,	\

		  type5,arg5,type6,arg6)					\

static type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,	\

                  type6 arg6)							\

{										\

	return syscall(__NR_##name, arg1, arg2, arg3, arg4, arg5, arg6);	\

}

#define __NR_sys_exit __NR_exit

#define __NR_sys_uname __NR_uname

#define __NR_sys_faccessat __NR_faccessat

#define __NR_sys_fchmodat __NR_fchmodat

#define __NR_sys_fchownat __NR_fchownat

#define __NR_sys_fstatat64 __NR_fstatat64

#define __NR_sys_futimesat __NR_futimesat

#define __NR_sys_getcwd1 __NR_getcwd

#define __NR_sys_getdents __NR_getdents

#define __NR_sys_getdents64 __NR_getdents64

#define __NR_sys_getpriority __NR_getpriority

#define __NR_sys_linkat __NR_linkat

#define __NR_sys_mkdirat __NR_mkdirat

#define __NR_sys_mknodat __NR_mknodat

#define __NR_sys_openat __NR_openat

#define __NR_sys_readlinkat __NR_readlinkat

#define __NR_sys_renameat __NR_renameat

#define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo

#define __NR_sys_symlinkat __NR_symlinkat

#define __NR_sys_syslog __NR_syslog

#define __NR_sys_tgkill __NR_tgkill

#define __NR_sys_tkill __NR_tkill

#define __NR_sys_unlinkat __NR_unlinkat

#define __NR_sys_utimensat __NR_utimensat

#define __NR_sys_futex __NR_futex

#define __NR_sys_inotify_init __NR_inotify_init

#define __NR_sys_inotify_add_watch __NR_inotify_add_watch

#define __NR_sys_inotify_rm_watch __NR_inotify_rm_watch

#if defined(__alpha__) || defined (__ia64__) || defined(__x86_64__)

#define __NR__llseek __NR_lseek

#endif

#ifdef __NR_gettid

_syscall0(int, gettid)

#else

/* This is a replacement for the host gettid() and must return a host

   errno. */

static int gettid(void) {

    return -ENOSYS;

}

#endif

_syscall1(int,sys_exit,int,status)

_syscall1(int,sys_uname,struct new_utsname *,buf)

#if defined(TARGET_NR_faccessat) && defined(__NR_faccessat)

_syscall4(int,sys_faccessat,int,dirfd,const char *,pathname,int,mode,int,flags)

#endif

#if defined(TARGET_NR_fchmodat) && defined(__NR_fchmodat)

_syscall4(int,sys_fchmodat,int,dirfd,const char *,pathname,

          mode_t,mode,int,flags)

#endif

#if defined(TARGET_NR_fchownat) && defined(__NR_fchownat) && defined(USE_UID16)

_syscall5(int,sys_fchownat,int,dirfd,const char *,pathname,

          uid_t,owner,gid_t,group,int,flags)

#endif

#if defined(TARGET_NR_fstatat64) && defined(__NR_fstatat64)

_syscall4(int,sys_fstatat64,int,dirfd,const char *,pathname,

          struct stat *,buf,int,flags)

#endif

#if defined(TARGET_NR_futimesat) && defined(__NR_futimesat)

_syscall3(int,sys_futimesat,int,dirfd,const char *,pathname,

         const struct timeval *,times)

#endif

_syscall2(int,sys_getcwd1,char *,buf,size_t,size)

#if TARGET_ABI_BITS == 32

_syscall3(int, sys_getdents, uint, fd, struct linux_dirent *, dirp, uint, count);

#endif

#if defined(TARGET_NR_getdents64) && defined(__NR_getdents64)

_syscall3(int, sys_getdents64, uint, fd, struct linux_dirent64 *, dirp, uint, count);

#endif

_syscall2(int, sys_getpriority, int, which, int, who);

#if !defined (__x86_64__)

_syscall5(int, _llseek,  uint,  fd, ulong, hi, ulong, lo,

          loff_t *, res, uint, wh);

#endif

#if defined(TARGET_NR_linkat) && defined(__NR_linkat)

_syscall5(int,sys_linkat,int,olddirfd,const char *,oldpath,

	  int,newdirfd,const char *,newpath,int,flags)

#endif

#if defined(TARGET_NR_mkdirat) && defined(__NR_mkdirat)

_syscall3(int,sys_mkdirat,int,dirfd,const char *,pathname,mode_t,mode)

#endif

#if defined(TARGET_NR_mknodat) && defined(__NR_mknodat)

_syscall4(int,sys_mknodat,int,dirfd,const char *,pathname,

          mode_t,mode,dev_t,dev)

#endif

#if defined(TARGET_NR_openat) && defined(__NR_openat)

_syscall4(int,sys_openat,int,dirfd,const char *,pathname,int,flags,mode_t,mode)

#endif

#if defined(TARGET_NR_readlinkat) && defined(__NR_readlinkat)

_syscall4(int,sys_readlinkat,int,dirfd,const char *,pathname,

          char *,buf,size_t,bufsize)

#endif

#if defined(TARGET_NR_renameat) && defined(__NR_renameat)

_syscall4(int,sys_renameat,int,olddirfd,const char *,oldpath,

          int,newdirfd,const char *,newpath)

#endif

_syscall3(int,sys_rt_sigqueueinfo,int,pid,int,sig,siginfo_t *,uinfo)

#if defined(TARGET_NR_symlinkat) && defined(__NR_symlinkat)

_syscall3(int,sys_symlinkat,const char *,oldpath,

          int,newdirfd,const char *,newpath)

#endif

_syscall3(int,sys_syslog,int,type,char*,bufp,int,len)

#if defined(TARGET_NR_tgkill) && defined(__NR_tgkill)

_syscall3(int,sys_tgkill,int,tgid,int,pid,int,sig)

#endif

#if defined(TARGET_NR_tkill) && defined(__NR_tkill)

_syscall2(int,sys_tkill,int,tid,int,sig)

#endif

#ifdef __NR_exit_group

_syscall1(int,exit_group,int,error_code)

#endif

#if defined(TARGET_NR_set_tid_address) && defined(__NR_set_tid_address)

_syscall1(int,set_tid_address,int *,tidptr)

#endif

#if defined(TARGET_NR_unlinkat) && defined(__NR_unlinkat)

_syscall3(int,sys_unlinkat,int,dirfd,const char *,pathname,int,flags)

#endif

#if defined(TARGET_NR_utimensat) && defined(__NR_utimensat)

_syscall4(int,sys_utimensat,int,dirfd,const char *,pathname,

          const struct timespec *,tsp,int,flags)

#endif

#if defined(TARGET_NR_inotify_init) && defined(__NR_inotify_init)

_syscall0(int,sys_inotify_init)

#endif

#if defined(TARGET_NR_inotify_add_watch) && defined(__NR_inotify_add_watch)

_syscall3(int,sys_inotify_add_watch,int,fd,const char *,pathname,uint32_t,mask)

#endif

#if defined(TARGET_NR_inotify_rm_watch) && defined(__NR_inotify_rm_watch)

_syscall2(int,sys_inotify_rm_watch,int,fd,uint32_t,wd)

#endif

#if defined(USE_NPTL)

#if defined(TARGET_NR_futex) && defined(__NR_futex)

_syscall6(int,sys_futex,int *,uaddr,int,op,int,val,

          const struct timespec *,timeout,int *,uaddr2,int,val3)

#endif

#endif

extern int personality(int);

extern int flock(int, int);

extern int setfsuid(int);

extern int setfsgid(int);

extern int setgroups(int, gid_t *);

#define ERRNO_TABLE_SIZE 1200

/* target_to_host_errno_table[] is initialized from

 * host_to_target_errno_table[] in syscall_init(). */

static uint16_t target_to_host_errno_table[ERRNO_TABLE_SIZE] = {

};

/*

 * This list is the union of errno values overridden in asm-<arch>/errno.h

 * minus the errnos that are not actually generic to all archs.

 */

static uint16_t host_to_target_errno_table[ERRNO_TABLE_SIZE] = {

    [EIDRM]		= TARGET_EIDRM,

    [ECHRNG]		= TARGET_ECHRNG,

    [EL2NSYNC]		= TARGET_EL2NSYNC,

    [EL3HLT]		= TARGET_EL3HLT,

    [EL3RST]		= TARGET_EL3RST,

    [ELNRNG]		= TARGET_ELNRNG,

    [EUNATCH]		= TARGET_EUNATCH,

    [ENOCSI]		= TARGET_ENOCSI,

    [EL2HLT]		= TARGET_EL2HLT,

    [EDEADLK]		= TARGET_EDEADLK,

    [ENOLCK]		= TARGET_ENOLCK,

    [EBADE]		= TARGET_EBADE,

    [EBADR]		= TARGET_EBADR,

    [EXFULL]		= TARGET_EXFULL,

    [ENOANO]		= TARGET_ENOANO,

    [EBADRQC]		= TARGET_EBADRQC,

    [EBADSLT]		= TARGET_EBADSLT,

    [EBFONT]		= TARGET_EBFONT,

    [ENOSTR]		= TARGET_ENOSTR,

    [ENODATA]		= TARGET_ENODATA,

    [ETIME]		= TARGET_ETIME,

    [ENOSR]		= TARGET_ENOSR,

    [ENONET]		= TARGET_ENONET,

    [ENOPKG]		= TARGET_ENOPKG,

    [EREMOTE]		= TARGET_EREMOTE,

    [ENOLINK]		= TARGET_ENOLINK,

    [EADV]		= TARGET_EADV,

    [ESRMNT]		= TARGET_ESRMNT,

    [ECOMM]		= TARGET_ECOMM,

    [EPROTO]		= TARGET_EPROTO,

    [EDOTDOT]		= TARGET_EDOTDOT,

    [EMULTIHOP]		= TARGET_EMULTIHOP,

    [EBADMSG]		= TARGET_EBADMSG,

    [ENAMETOOLONG]	= TARGET_ENAMETOOLONG,

    [EOVERFLOW]		= TARGET_EOVERFLOW,

    [ENOTUNIQ]		= TARGET_ENOTUNIQ,

    [EBADFD]		= TARGET_EBADFD,

    [EREMCHG]		= TARGET_EREMCHG,

    [ELIBACC]		= TARGET_ELIBACC,

    [ELIBBAD]		= TARGET_ELIBBAD,

    [ELIBSCN]		= TARGET_ELIBSCN,

    [ELIBMAX]		= TARGET_ELIBMAX,

    [ELIBEXEC]		= TARGET_ELIBEXEC,

    [EILSEQ]		= TARGET_EILSEQ,

    [ENOSYS]		= TARGET_ENOSYS,

    [ELOOP]		= TARGET_ELOOP,

    [ERESTART]		= TARGET_ERESTART,

    [ESTRPIPE]		= TARGET_ESTRPIPE,

    [ENOTEMPTY]		= TARGET_ENOTEMPTY,

    [EUSERS]		= TARGET_EUSERS,

    [ENOTSOCK]		= TARGET_ENOTSOCK,

    [EDESTADDRREQ]	= TARGET_EDESTADDRREQ,

    [EMSGSIZE]		= TARGET_EMSGSIZE,

    [EPROTOTYPE]	= TARGET_EPROTOTYPE,

    [ENOPROTOOPT]	= TARGET_ENOPROTOOPT,

    [EPROTONOSUPPORT]	= TARGET_EPROTONOSUPPORT,

    [ESOCKTNOSUPPORT]	= TARGET_ESOCKTNOSUPPORT,

    [EOPNOTSUPP]	= TARGET_EOPNOTSUPP,

    [EPFNOSUPPORT]	= TARGET_EPFNOSUPPORT,

    [EAFNOSUPPORT]	= TARGET_EAFNOSUPPORT,

    [EADDRINUSE]	= TARGET_EADDRINUSE,

    [EADDRNOTAVAIL]	= TARGET_EADDRNOTAVAIL,

    [ENETDOWN]		= TARGET_ENETDOWN,

    [ENETUNREACH]	= TARGET_ENETUNREACH,

    [ENETRESET]		= TARGET_ENETRESET,

    [ECONNABORTED]	= TARGET_ECONNABORTED,

    [ECONNRESET]	= TARGET_ECONNRESET,

    [ENOBUFS]		= TARGET_ENOBUFS,

    [EISCONN]		= TARGET_EISCONN,

    [ENOTCONN]		= TARGET_ENOTCONN,

    [EUCLEAN]		= TARGET_EUCLEAN,

    [ENOTNAM]		= TARGET_ENOTNAM,

    [ENAVAIL]		= TARGET_ENAVAIL,

    [EISNAM]		= TARGET_EISNAM,

    [EREMOTEIO]		= TARGET_EREMOTEIO,

    [ESHUTDOWN]		= TARGET_ESHUTDOWN,

    [ETOOMANYREFS]	= TARGET_ETOOMANYREFS,

    [ETIMEDOUT]		= TARGET_ETIMEDOUT,

    [ECONNREFUSED]	= TARGET_ECONNREFUSED,

    [EHOSTDOWN]		= TARGET_EHOSTDOWN,

    [EHOSTUNREACH]	= TARGET_EHOSTUNREACH,

    [EALREADY]		= TARGET_EALREADY,

    [EINPROGRESS]	= TARGET_EINPROGRESS,

    [ESTALE]		= TARGET_ESTALE,

    [ECANCELED]		= TARGET_ECANCELED,

    [ENOMEDIUM]		= TARGET_ENOMEDIUM,

    [EMEDIUMTYPE]	= TARGET_EMEDIUMTYPE,

#ifdef ENOKEY

    [ENOKEY]		= TARGET_ENOKEY,

#endif

#ifdef EKEYEXPIRED

    [EKEYEXPIRED]	= TARGET_EKEYEXPIRED,

#endif

#ifdef EKEYREVOKED

    [EKEYREVOKED]	= TARGET_EKEYREVOKED,

#endif

#ifdef EKEYREJECTED

    [EKEYREJECTED]	= TARGET_EKEYREJECTED,

#endif

#ifdef EOWNERDEAD

    [EOWNERDEAD]	= TARGET_EOWNERDEAD,

#endif

#ifdef ENOTRECOVERABLE

    [ENOTRECOVERABLE]	= TARGET_ENOTRECOVERABLE,

#endif

};

static inline int host_to_target_errno(int err)

{

    if(host_to_target_errno_table[err])

        return host_to_target_errno_table[err];

    return err;

}

static inline int target_to_host_errno(int err)

{

    if (target_to_host_errno_table[err])

        return target_to_host_errno_table[err];

    return err;

}

static inline abi_long get_errno(abi_long ret)

{

    if (ret == -1)

        return -host_to_target_errno(errno);

    else

        return ret;

}

static inline int is_error(abi_long ret)

{

    return (abi_ulong)ret >= (abi_ulong)(-4096);

}

char *target_strerror(int err)

{

    return strerror(target_to_host_errno(err));

}

static abi_ulong target_brk;

static abi_ulong target_original_brk;

void target_set_brk(abi_ulong new_brk)

{

    target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);

}

/* do_brk() must return target values and target errnos. */

abi_long do_brk(abi_ulong new_brk)

{

    abi_ulong brk_page;

    abi_long mapped_addr;

    int	new_alloc_size;

    if (!new_brk)

        return target_brk;

    if (new_brk < target_original_brk)

        return target_brk;

    brk_page = HOST_PAGE_ALIGN(target_brk);

    /* If the new brk is less than this, set it and we're done... */

    if (new_brk < brk_page) {

	target_brk = new_brk;

    	return target_brk;

    }

    /* We need to allocate more memory after the brk... */

    new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page + 1);

    mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,

                                        PROT_READ|PROT_WRITE,

                                        MAP_ANON|MAP_FIXED|MAP_PRIVATE, 0, 0));

    if (!is_error(mapped_addr))

	target_brk = new_brk;

    return target_brk;

}

static inline abi_long copy_from_user_fdset(fd_set *fds,

                                            abi_ulong target_fds_addr,

                                            int n)

{

    int i, nw, j, k;

    abi_ulong b, *target_fds;

    nw = (n + TARGET_ABI_BITS - 1) / TARGET_ABI_BITS;

    if (!(target_fds = lock_user(VERIFY_READ,

                                 target_fds_addr,

                                 sizeof(abi_ulong) * nw,

                                 1)))

        return -TARGET_EFAULT;

    FD_ZERO(fds);

    k = 0;

    for (i = 0; i < nw; i++) {

        /* grab the abi_ulong */

        __get_user(b, &target_fds[i]);

        for (j = 0; j < TARGET_ABI_BITS; j++) {

            /* check the bit inside the abi_ulong */

            if ((b >> j) & 1)

                FD_SET(k, fds);

            k++;

        }

    }