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compat_60_mod.c revision 1.1.2.3 
      1 /*	$NetBSD: compat_60_mod.c,v 1.1.2.3 2018/03/16 08:10:26 pgoyette Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software developed for The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Linkage for the compat module: spaghetti.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: compat_60_mod.c,v 1.1.2.3 2018/03/16 08:10:26 pgoyette Exp $");
     38 
     39 #ifdef _KERNEL_OPT
     40 #include "opt_compat_netbsd.h"
     41 #include "opt_compat_43.h"
     42 #endif
     43 
     44 #include <sys/systm.h>
     45 #include <sys/module.h>
     46 #include <sys/sysctl.h>
     47 #include <sys/syscall.h>
     48 #include <sys/syscallvar.h>
     49 #include <sys/syscallargs.h>
     50 
     51 #include <compat/common/compat_util.h>
     52 #include <compat/common/compat_mod.h>
     53 
     54 static const struct syscall_package compat_60_syscalls[] = {
     55 	{ SYS_compat_60__lwp_park, 0, (sy_call_t *)compat_60__lwp_park },
     56 	{ NULL, 0, NULL }
     57 };
     58 
     59 #ifdef _MODULE
     60 
     61 #define REQUIRED_60 "compat_70"		/* XXX No compat_80 yet */
     62 MODULE(MODULE_CLASS_EXEC, compat_60, REQUIRED_60);
     63 
     64 #ifdef CPU_UCODE
     65 int (*orig_compat_6_cpu_ucode)(struct compat6_cpu_ucode *);
     66 int (*orig_compat6_cpu_ucode_apply)(const struct compat6_cpu_ucode *);
     67 #endif
     68 
     69 static const struct syscall_package compat__60_syscalls[] = {
     70         { SYS_compat_60__lwp_park, 0, (sy_call_t *)compat_60_sys__lwp_park },
     71         NULL, 0, NULL }
     72 };
     73 
     74 static int
     75 compat_60_modcmd(modcmd_t cmd, void *arg)
     76 {
     77 	int error;
     78 
     79 	switch (cmd) {
     80 	case MODULE_CMD_INIT:
     81 		return compat_60_init();
     82 	case MODULE_CMD_FINI:
     83 		return compat_60_init();
     84 	default:
     85 		return ENOTTY;
     86 	}
     87 }
     88 #endif	/* _MODULE */
     89 
     90 int compat_60_init(void)
     91 {
     92 	int error;
     93 
     94 	error = syscall_establish(NULL, compat_60_syscalls);
     95 	if (error != 0)
     96 		return error;
     97 #ifdef CPU_UCODE
     98 	orig_get_version = vec_compat6_cpu_ucode_get_version;
     99 	*vec_compat6_cpu_ucode_get_version = compat6_cpu_ucode_get_version;
    100 	orig_apply = vec_compat6_cpu_ucode_apply;
    101 	*vec_compat6_cpu_ucode_apply = compat6_cpu_ucode_apply;
    102 #endif
    103 	return 0;
    104 }
    105 
    106 int compat_60_fini(void)
    107 {
    108 	int error;
    109 
    110 	*vec_compat6_cpu_ucode_get_version = orig_get_version;
    111 	*vec_compat6_cpu_ucode_apply = orig_apply;
    112 	error = syscall_disestablish(NULL, compat_60_syscalls);
    113 
    114 	return error;
    115 }
    116