FreeBSD/Linux Kernel Cross Reference
sys/x86/include/sysarch.h

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 1993 The Regents of the University of California.
      * 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. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
     *
     * $FreeBSD: releng/12.0/sys/x86/include/sysarch.h 326023 2017-11-20 19:43:44Z pfg $
     */
    
    /*
     * Architecture specific syscalls (X86)
     */
    #ifndef _MACHINE_SYSARCH_H_
    #define _MACHINE_SYSARCH_H_
    
    #include <sys/cdefs.h>
    
    #define I386_GET_LDT    0
    #define I386_SET_LDT    1
    #define LDT_AUTO_ALLOC  0xffffffff
                                    /* I386_IOPL */
    #define I386_GET_IOPERM 3
    #define I386_SET_IOPERM 4
                                    /* xxxxx */
    #define I386_VM86               6       /* XXX Not implementable on amd64 */
    #define I386_GET_FSBASE         7
    #define I386_SET_FSBASE         8
    #define I386_GET_GSBASE         9
    #define I386_SET_GSBASE         10
    #define I386_GET_XFPUSTATE      11
    
    /* Leave space for 0-127 for to avoid translating syscalls */
    #define AMD64_GET_FSBASE        128
    #define AMD64_SET_FSBASE        129
    #define AMD64_GET_GSBASE        130
    #define AMD64_SET_GSBASE        131
    #define AMD64_GET_XFPUSTATE     132
    
    struct i386_ioperm_args {
            unsigned int start;
            unsigned int length;
            int     enable;
    };
    
    #ifdef __i386__
    struct i386_ldt_args {
            unsigned int start;
            union descriptor *descs;
            unsigned int num;
    };
    
    struct i386_vm86_args {
            int     sub_op;                 /* sub-operation to perform */
            char    *sub_args;              /* args */
    };
    
    struct i386_get_xfpustate {
            void *addr;
            int len;
    };
    #else
    struct i386_ldt_args {
            unsigned int start;
            struct user_segment_descriptor *descs __packed;
            unsigned int num;
    };
    
    struct i386_get_xfpustate {
            unsigned int addr;
            int len;
    };
    
    struct amd64_get_xfpustate {
            void *addr;
            int len;
   };
   #endif
   
   #ifndef _KERNEL
   union descriptor;
   struct dbreg;
   
   __BEGIN_DECLS
   int i386_get_ldt(int, union descriptor *, int);
   int i386_set_ldt(int, union descriptor *, int);
   int i386_get_ioperm(unsigned int, unsigned int *, int *);
   int i386_set_ioperm(unsigned int, unsigned int, int);
   int i386_vm86(int, void *);
   int i386_get_fsbase(void **);
   int i386_get_gsbase(void **);
   int i386_set_fsbase(void *);
   int i386_set_gsbase(void *);
   int i386_set_watch(int, unsigned int, int, int, struct dbreg *);
   int i386_clr_watch(int, struct dbreg *);
   int amd64_get_fsbase(void **);
   int amd64_get_gsbase(void **);
   int amd64_set_fsbase(void *);
   int amd64_set_gsbase(void *);
   int sysarch(int, void *);
   __END_DECLS
   #else
   struct thread;
   union descriptor;
   
   int i386_get_ldt(struct thread *, struct i386_ldt_args *);
   int i386_set_ldt(struct thread *, struct i386_ldt_args *, union descriptor *);
   int i386_get_ioperm(struct thread *, struct i386_ioperm_args *);
   int i386_set_ioperm(struct thread *, struct i386_ioperm_args *);
   int amd64_get_ldt(struct thread *, struct i386_ldt_args *);
   int amd64_set_ldt(struct thread *, struct i386_ldt_args *,
       struct user_segment_descriptor *);
   int amd64_get_ioperm(struct thread *, struct i386_ioperm_args *);
   int amd64_set_ioperm(struct thread *, struct i386_ioperm_args *);
   #endif
   
   #endif /* !_MACHINE_SYSARCH_H_ */

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