FreeBSD/Linux Kernel Cross Reference
sys/compat/linux32/common/linux32_unistd.c

     /*      $NetBSD: linux32_unistd.c,v 1.24 2008/10/03 22:39:36 njoly Exp $ */
     
     /*-
      * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Emmanuel Dreyfus
     * 4. The name of the author may not be used to endorse or promote 
     *    products derived from this software without specific prior written 
     *    permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' 
     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
     * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    
    __KERNEL_RCSID(0, "$NetBSD: linux32_unistd.c,v 1.24 2008/10/03 22:39:36 njoly Exp $");
    
    #include <sys/types.h>
    #include <sys/param.h>
    #include <sys/fstypes.h>
    #include <sys/signal.h>
    #include <sys/dirent.h>
    #include <sys/kernel.h>
    #include <sys/fcntl.h>
    #include <sys/select.h>
    #include <sys/proc.h>
    #include <sys/ucred.h>
    #include <sys/swap.h>
    
    #include <machine/types.h>
    
    #include <sys/syscallargs.h>
    
    #include <compat/netbsd32/netbsd32.h>
    #include <compat/netbsd32/netbsd32_conv.h>
    
    #include <compat/linux/common/linux_types.h>
    #include <compat/linux/common/linux_signal.h>
    #include <compat/linux/common/linux_machdep.h>
    #include <compat/linux/common/linux_misc.h>
    #include <compat/linux/common/linux_oldolduname.h>
    #include <compat/linux/linux_syscallargs.h>
    
    #include <compat/linux32/common/linux32_types.h>
    #include <compat/linux32/common/linux32_signal.h>
    #include <compat/linux32/common/linux32_machdep.h>
    #include <compat/linux32/common/linux32_sysctl.h>
    #include <compat/linux32/common/linux32_socketcall.h>
    #include <compat/linux32/linux32_syscallargs.h>
    
    static int linux32_select1(struct lwp *, register_t *, 
        int, fd_set *, fd_set *, fd_set *, struct timeval *);
    
    int
    linux32_sys_brk(struct lwp *l, const struct linux32_sys_brk_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(netbsd32_charp) nsize;
            } */
            struct linux_sys_brk_args ua;
    
            NETBSD32TOP_UAP(nsize, char);
            return linux_sys_brk(l, &ua, retval);
    }
    
    int
    linux32_sys_llseek(struct lwp *l, const struct linux32_sys_llseek_args *uap, register_t *retval)
    {
            /* {
                    syscallcarg(int) fd;
                    syscallarg(u_int32_t) ohigh;
                    syscallarg(u_int32_t) olow;
                    syscallarg(netbsd32_caddr_t) res;
                    syscallcarg(int) whence;
            } */
            struct linux_sys_llseek_args ua;
    
            NETBSD32TO64_UAP(fd);
            NETBSD32TO64_UAP(ohigh);
           NETBSD32TO64_UAP(olow);
           NETBSD32TOP_UAP(res, char);
           NETBSD32TO64_UAP(whence);
   
           return linux_sys_llseek(l, &ua, retval);
   }
   
   int
   linux32_sys_select(struct lwp *l, const struct linux32_sys_select_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) nfds;
                   syscallarg(netbsd32_fd_setp_t) readfds;
                   syscallarg(netbsd32_fd_setp_t) writefds;
                   syscallarg(netbsd32_fd_setp_t) exceptfds;
                   syscallarg(netbsd32_timevalp_t) timeout;
           } */
   
           return linux32_select1(l, retval, SCARG(uap, nfds), 
               SCARG_P32(uap, readfds),
               SCARG_P32(uap, writefds), 
               SCARG_P32(uap, exceptfds), 
               SCARG_P32(uap, timeout));
   }
   
   int
   linux32_sys_oldselect(struct lwp *l, const struct linux32_sys_oldselect_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(linux32_oldselectp_t) lsp;
           } */
           struct linux32_oldselect lsp32;
           int error;
   
           if ((error = copyin(SCARG_P32(uap, lsp), &lsp32, sizeof(lsp32))) != 0)
                   return error;
   
           return linux32_select1(l, retval, lsp32.nfds, 
                NETBSD32PTR64(lsp32.readfds), NETBSD32PTR64(lsp32.writefds),
                NETBSD32PTR64(lsp32.exceptfds), NETBSD32PTR64(lsp32.timeout));
   }
   
   static int
   linux32_select1(l, retval, nfds, readfds, writefds, exceptfds, timeout)
           struct lwp *l;
           register_t *retval;
           int nfds;
           fd_set *readfds, *writefds, *exceptfds;
           struct timeval *timeout;
   {   
           struct timeval tv0, tv1, utv, *tv = NULL;
           struct netbsd32_timeval utv32;
           int error;
   
           timerclear(&utv); /* XXX GCC4 */
   
           /*
            * Store current time for computation of the amount of
            * time left.
            */
           if (timeout) {
                   if ((error = copyin(timeout, &utv32, sizeof(utv32))))
                           return error;
   
                   netbsd32_to_timeval(&utv32, &utv);
   
                   if (itimerfix(&utv)) {
                           /*
                            * The timeval was invalid.  Convert it to something
                            * valid that will act as it does under Linux.
                            */
                           utv.tv_sec += utv.tv_usec / 1000000;
                           utv.tv_usec %= 1000000;
                           if (utv.tv_usec < 0) {
                                   utv.tv_sec -= 1;
                                   utv.tv_usec += 1000000;
                           }
                           if (utv.tv_sec < 0)
                                   timerclear(&utv);
                   }
                   microtime(&tv0);
                   tv = &utv;
           }
   
           error = selcommon(l, retval, nfds, 
               readfds, writefds, exceptfds, tv, NULL);
   
           if (error) {
                   /*
                    * See fs/select.c in the Linux kernel.  Without this,
                    * Maelstrom doesn't work.
                    */
                   if (error == ERESTART)
                           error = EINTR;
                   return error;
           }
   
           if (timeout) {
                   if (*retval) {
                           /*
                            * Compute how much time was left of the timeout,
                            * by subtracting the current time and the time
                            * before we started the call, and subtracting
                            * that result from the user-supplied value.
                            */
                           microtime(&tv1);
                           timersub(&tv1, &tv0, &tv1);
                           timersub(&utv, &tv1, &utv);
                           if (utv.tv_sec < 0)
                                   timerclear(&utv);
                   } else {
                           timerclear(&utv);
                   }
                   
                   netbsd32_from_timeval(&utv, &utv32);
   
                   if ((error = copyout(&utv32, timeout, sizeof(utv32))))
                           return error;
           }
   
           return 0;
   }
   
   int
   linux32_sys_pipe(struct lwp *l, const struct linux32_sys_pipe_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(netbsd32_intp) fd;
           } */
           int error;
           int pfds[2];
   
           if ((error = sys_pipe(l, 0, retval)))
                   return error;
   
           pfds[0] = (int)retval[0];
           pfds[1] = (int)retval[1];
   
           if ((error = copyout(pfds, SCARG_P32(uap, fd), 2 * sizeof (int))) != 0)
                   return error;
   
           retval[0] = 0;
           retval[1] = 0;
   
           return 0;
   }
   
   
   int
   linux32_sys_unlink(struct lwp *l, const struct linux32_sys_unlink_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(const netbsd32_charp) path;
           } */
           struct linux_sys_unlink_args ua;
   
           NETBSD32TOP_UAP(path, const char);
           
           return linux_sys_unlink(l, &ua, retval);
   }
   
   int
   linux32_sys_creat(struct lwp *l, const struct linux32_sys_creat_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(const netbsd32_charp) path;
                   syscallarg(int) mode;
           } */
           struct sys_open_args ua;
   
           NETBSD32TOP_UAP(path, const char);
           SCARG(&ua, flags) = O_CREAT | O_TRUNC | O_WRONLY;
           NETBSD32TO64_UAP(mode);
   
           return sys_open(l, &ua, retval);
   }
   
   int
   linux32_sys_mknod(struct lwp *l, const struct linux32_sys_mknod_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(const netbsd32_charp) path;
                   syscallarg(int) mode;
                   syscallarg(int) dev;
           } */
           struct linux_sys_mknod_args ua;
   
           NETBSD32TOP_UAP(path, const char);
           NETBSD32TO64_UAP(mode);
           NETBSD32TO64_UAP(dev);
   
           return linux_sys_mknod(l, &ua, retval);
   }
   
   int
   linux32_sys_break(struct lwp *l, const struct linux32_sys_break_args *uap, register_t *retval)
   {
   #if 0
           /* {
                   syscallarg(const netbsd32_charp) nsize;
           } */
   #endif
   
           return ENOSYS;
   }
   
   int
   linux32_sys_swapon(struct lwp *l, const struct linux32_sys_swapon_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(const netbsd32_charp) name;
           } */
           struct sys_swapctl_args ua;
   
           SCARG(&ua, cmd) = SWAP_ON;
           SCARG(&ua, arg) = SCARG_P32(uap, name);
           SCARG(&ua, misc) = 0;   /* priority */
           return (sys_swapctl(l, &ua, retval));
   }
   
   int
   linux32_sys_swapoff(struct lwp *l, const struct linux32_sys_swapoff_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(const netbsd32_charp) path;
           } */
           struct sys_swapctl_args ua;
   
           SCARG(&ua, cmd) = SWAP_OFF;
           SCARG(&ua, arg) = SCARG_P32(uap, path);
           SCARG(&ua, misc) = 0;   /* priority */
           return (sys_swapctl(l, &ua, retval));
   }
   
   
   int
   linux32_sys_reboot(struct lwp *l, const struct linux32_sys_reboot_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) magic1;
                   syscallarg(int) magic2;
                   syscallarg(int) cmd;
                   syscallarg(netbsd32_voidp) arg;
           } */
           struct linux_sys_reboot_args ua;
   
           NETBSD32TO64_UAP(magic1);
           NETBSD32TO64_UAP(magic2);
           NETBSD32TO64_UAP(cmd);
           NETBSD32TOP_UAP(arg, void);
           
           return linux_sys_reboot(l, &ua, retval);
   }
   
   int
   linux32_sys_setresuid(struct lwp *l, const struct linux32_sys_setresuid_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(uid_t) ruid;
                   syscallarg(uid_t) euid;
                   syscallarg(uid_t) suid;
           } */
           struct linux_sys_setresuid_args ua;
   
           SCARG(&ua, ruid) = (SCARG(uap, ruid) == -1) ? -1 : SCARG(uap, ruid);
           SCARG(&ua, euid) = (SCARG(uap, euid) == -1) ? -1 : SCARG(uap, euid);
           SCARG(&ua, suid) = (SCARG(uap, suid) == -1) ? -1 : SCARG(uap, suid);
   
           return linux_sys_setresuid(l, &ua, retval);
   }
   
   int
   linux32_sys_setresgid(struct lwp *l, const struct linux32_sys_setresgid_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(gid_t) rgid;
                   syscallarg(gid_t) egid;
                   syscallarg(gid_t) sgid;
           } */
           struct linux_sys_setresgid_args ua;
   
           SCARG(&ua, rgid) = (SCARG(uap, rgid) == -1) ? -1 : SCARG(uap, rgid);
           SCARG(&ua, egid) = (SCARG(uap, egid) == -1) ? -1 : SCARG(uap, egid);
           SCARG(&ua, sgid) = (SCARG(uap, sgid) == -1) ? -1 : SCARG(uap, sgid);
   
           return linux_sys_setresgid(l, &ua, retval);
   }
   
   int
   linux32_sys_nice(struct lwp *l, const struct linux32_sys_nice_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) incr;
           } */
           struct proc *p = l->l_proc;
           struct sys_setpriority_args bsa;
   
           SCARG(&bsa, which) = PRIO_PROCESS;
           SCARG(&bsa, who) = 0;
           SCARG(&bsa, prio) = p->p_nice - NZERO + SCARG(uap, incr);
   
           return sys_setpriority(l, &bsa, retval);
   }
   
   int
   linux32_sys_alarm(struct lwp *l, const struct linux32_sys_alarm_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(unsigned int) secs;
           } */
           struct linux_sys_alarm_args ua;
   
           NETBSD32TO64_UAP(secs);
   
           return linux_sys_alarm(l, &ua, retval);
   }
   
   int
   linux32_sys_fdatasync(struct lwp *l, const struct linux32_sys_fdatasync_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) fd;
           } */
           struct linux_sys_fdatasync_args ua;
   
           NETBSD32TO64_UAP(fd);
   
           return linux_sys_fdatasync(l, &ua, retval);
   }
   
   int
   linux32_sys_setfsuid(struct lwp *l, const struct linux32_sys_setfsuid_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(uid_t) uid;
           } */
           struct linux_sys_setfsuid_args ua;
   
           NETBSD32TO64_UAP(uid);
   
           return linux_sys_setfsuid(l, &ua, retval);
   }
   
   int
   linux32_sys_setfsgid(struct lwp *l, const struct linux32_sys_setfsgid_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(gid_t) gid;
           } */
           struct linux_sys_setfsgid_args ua;
   
           NETBSD32TO64_UAP(gid);
   
           return linux_sys_setfsgid(l, &ua, retval);
   }
   
   /*
    * pread(2).
    */
   int
   linux32_sys_pread(struct lwp *l,
       const struct linux32_sys_pread_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) fd;
                   syscallarg(netbsd32_voidp) buf;
                   syscallarg(netbsd32_size_t) nbyte;
                   syscallarg(linux32_off_t) offset;
           } */
           struct sys_pread_args pra;
   
           SCARG(&pra, fd) = SCARG(uap, fd);
           SCARG(&pra, buf) = SCARG_P32(uap, buf);
           SCARG(&pra, nbyte) = SCARG(uap, nbyte);
           SCARG(&pra, offset) = SCARG(uap, offset);
   
           return sys_pread(l, &pra, retval);
   }
   
   /*
    * pwrite(2).
    */
   int
   linux32_sys_pwrite(struct lwp *l,
       const struct linux32_sys_pwrite_args *uap, register_t *retval)
   {
           /* {
                   syscallarg(int) fd;
                   syscallarg(const netbsd32_voidp) buf;
                   syscallarg(netbsd32_size_t) nbyte;
                   syscallarg(linux32_off_t) offset;
           } */
           struct sys_pwrite_args pra;
   
           SCARG(&pra, fd) = SCARG(uap, fd);
           SCARG(&pra, buf) = SCARG_P32(uap, buf);
           SCARG(&pra, nbyte) = SCARG(uap, nbyte);
           SCARG(&pra, offset) = SCARG(uap, offset);
   
           return sys_pwrite(l, &pra, retval);
   }
   

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