linux_util.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1994 Christos Zoulas
    5  * Copyright (c) 1995 Frank van der Linden
    6  * Copyright (c) 1995 Scott Bartram
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. The name of the author may not be used to endorse or promote products
   18  *    derived from this software without specific prior written permission
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  * from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
   32  * from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
   33  * $FreeBSD: releng/12.0/sys/compat/linux/linux_util.h 328890 2018-02-05 17:29:12Z emaste $
   34  */
   35 
   36 #ifndef _LINUX_UTIL_H_
   37 #define _LINUX_UTIL_H_
   38 
   39 #include <vm/vm.h>
   40 #include <vm/vm_param.h>
   41 #include <vm/pmap.h>
   42 #include <sys/exec.h>
   43 #include <sys/sysent.h>
   44 #include <sys/syslog.h>
   45 #include <sys/cdefs.h>
   46 #include <sys/uio.h>
   47 
   48 MALLOC_DECLARE(M_LINUX);
   49 MALLOC_DECLARE(M_EPOLL);
   50 MALLOC_DECLARE(M_FUTEX);
   51 MALLOC_DECLARE(M_FUTEX_WP);
   52 
   53 extern const char linux_emul_path[];
   54 
   55 int linux_emul_convpath(struct thread *, const char *, enum uio_seg, char **, int, int);
   56 
   57 #define LCONVPATH_AT(td, upath, pathp, i, dfd)                          \
   58         do {                                                            \
   59                 int _error;                                             \
   60                                                                         \
   61                 _error = linux_emul_convpath(td, upath, UIO_USERSPACE,  \
   62                     pathp, i, dfd);                                     \
   63                 if (*(pathp) == NULL)                                   \
   64                         return (_error);                                \
   65         } while (0)
   66 
   67 #define LCONVPATH(td, upath, pathp, i)  \
   68    LCONVPATH_AT(td, upath, pathp, i, AT_FDCWD)
   69 
   70 #define LCONVPATHEXIST(td, upath, pathp) LCONVPATH(td, upath, pathp, 0)
   71 #define LCONVPATHEXIST_AT(td, upath, pathp, dfd) LCONVPATH_AT(td, upath, pathp, 0, dfd)
   72 #define LCONVPATHCREAT(td, upath, pathp) LCONVPATH(td, upath, pathp, 1)
   73 #define LCONVPATHCREAT_AT(td, upath, pathp, dfd) LCONVPATH_AT(td, upath, pathp, 1, dfd)
   74 #define LFREEPATH(path) free(path, M_TEMP)
   75 
   76 #define DUMMY(s)                                                        \
   77 LIN_SDT_PROBE_DEFINE0(dummy, s, entry);                                 \
   78 LIN_SDT_PROBE_DEFINE0(dummy, s, not_implemented);                       \
   79 LIN_SDT_PROBE_DEFINE1(dummy, s, return, "int");                         \
   80 int                                                                     \
   81 linux_ ## s(struct thread *td, struct linux_ ## s ## _args *args)       \
   82 {                                                                       \
   83         static pid_t pid;                                               \
   84                                                                         \
   85         LIN_SDT_PROBE0(dummy, s, entry);                                \
   86                                                                         \
   87         if (pid != td->td_proc->p_pid) {                                \
   88                 linux_msg(td, "syscall %s not implemented", #s);        \
   89                 LIN_SDT_PROBE0(dummy, s, not_implemented);              \
   90                 pid = td->td_proc->p_pid;                               \
   91         };                                                              \
   92                                                                         \
   93         LIN_SDT_PROBE1(dummy, s, return, ENOSYS);                       \
   94         return (ENOSYS);                                                \
   95 }                                                                       \
   96 struct __hack
   97 
   98 /*
   99  * This is for the syscalls that are not even yet implemented in Linux.
  100  *
  101  * They're marked as UNIMPL in syscall.master so it will
  102  * have nosys record in linux_sysent[].
  103  */
  104 #define UNIMPLEMENTED(s)
  105 
  106 void linux_msg(const struct thread *td, const char *fmt, ...)
  107         __printflike(2, 3);
  108 
  109 struct linux_device_handler {
  110         char    *bsd_driver_name;
  111         char    *linux_driver_name;
  112         char    *bsd_device_name;
  113         char    *linux_device_name;
  114         int     linux_major;
  115         int     linux_minor;
  116         int     linux_char_device;
  117 };
  118 
  119 int     linux_device_register_handler(struct linux_device_handler *h);
  120 int     linux_device_unregister_handler(struct linux_device_handler *h);
  121 char    *linux_driver_get_name_dev(device_t dev);
  122 int     linux_driver_get_major_minor(const char *node, int *major, int *minor);
  123 char    *linux_get_char_devices(void);
  124 void    linux_free_get_char_devices(char *string);
  125 
  126 #if defined(KTR)
  127 
  128 #define KTR_LINUX                               KTR_SUBSYS
  129 #define LINUX_CTRFMT(nm, fmt)   #nm"("fmt")"
  130 
  131 #define LINUX_CTR6(f, m, p1, p2, p3, p4, p5, p6) do {                   \
  132                 CTR6(KTR_LINUX, LINUX_CTRFMT(f, m),                     \
  133                     p1, p2, p3, p4, p5, p6);                            \
  134 } while (0)
  135 
  136 #define LINUX_CTR(f)                    LINUX_CTR6(f, "", 0, 0, 0, 0, 0, 0)
  137 #define LINUX_CTR0(f, m)                LINUX_CTR6(f, m, 0, 0, 0, 0, 0, 0)
  138 #define LINUX_CTR1(f, m, p1)            LINUX_CTR6(f, m, p1, 0, 0, 0, 0, 0)
  139 #define LINUX_CTR2(f, m, p1, p2)        LINUX_CTR6(f, m, p1, p2, 0, 0, 0, 0)
  140 #define LINUX_CTR3(f, m, p1, p2, p3)    LINUX_CTR6(f, m, p1, p2, p3, 0, 0, 0)
  141 #define LINUX_CTR4(f, m, p1, p2, p3, p4)        LINUX_CTR6(f, m, p1, p2, p3, p4, 0, 0)
  142 #define LINUX_CTR5(f, m, p1, p2, p3, p4, p5)    LINUX_CTR6(f, m, p1, p2, p3, p4, p5, 0)
  143 #else
  144 #define LINUX_CTR(f)
  145 #define LINUX_CTR0(f, m)
  146 #define LINUX_CTR1(f, m, p1)
  147 #define LINUX_CTR2(f, m, p1, p2)
  148 #define LINUX_CTR3(f, m, p1, p2, p3)
  149 #define LINUX_CTR4(f, m, p1, p2, p3, p4)
  150 #define LINUX_CTR5(f, m, p1, p2, p3, p4, p5)
  151 #define LINUX_CTR6(f, m, p1, p2, p3, p4, p5, p6)
  152 #endif
  153 
  154 #endif /* !_LINUX_UTIL_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/compat/linux/linux_util.h

FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_util.h