1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_capsicum.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/capsicum.h> 40 #include <sys/proc.h> 41 #include <sys/sysproto.h> 42 #include <sys/syscall.h> 43 #include <sys/sysent.h> 44 45 #include <machine/sysarch.h> 46 47 #ifndef _SYS_SYSPROTO_H_ 48 struct sysarch_args { 49 int op; 50 char *parms; 51 }; 52 #endif 53 54 /* Prototypes */ 55 static int arm32_sync_icache (struct thread *, void *); 56 static int arm32_drain_writebuf(struct thread *, void *); 57 58 static int 59 arm32_sync_icache(struct thread *td, void *args) 60 { 61 struct arm_sync_icache_args ua; 62 int error; 63 64 if ((error = copyin(args, &ua, sizeof(ua))) != 0) 65 return (error); 66 67 cpu_icache_sync_range(ua.addr, ua.len); 68 69 td->td_retval[0] = 0; 70 return (0); 71 } 72 73 static int 74 arm32_drain_writebuf(struct thread *td, void *args) 75 { 76 /* No args. */ 77 78 td->td_retval[0] = 0; 79 cpu_drain_writebuf(); 80 return (0); 81 } 82 83 static int 84 arm32_set_tp(struct thread *td, void *args) 85 { 86 87 if (td != curthread) 88 td->td_md.md_tp = (register_t)args; 89 else 90 #ifndef ARM_TP_ADDRESS 91 set_tls(args); 92 #else 93 *(register_t *)ARM_TP_ADDRESS = (register_t)args; 94 #endif 95 return (0); 96 } 97 98 static int 99 arm32_get_tp(struct thread *td, void *args) 100 { 101 102 if (td != curthread) 103 td->td_retval[0] = td->td_md.md_tp; 104 else 105 #ifndef ARM_TP_ADDRESS 106 td->td_retval[0] = (register_t)get_tls(); 107 #else 108 td->td_retval[0] = *(register_t *)ARM_TP_ADDRESS; 109 #endif 110 return (0); 111 } 112 113 int 114 sysarch(td, uap) 115 struct thread *td; 116 register struct sysarch_args *uap; 117 { 118 int error; 119 120 #ifdef CAPABILITY_MODE 121 /* 122 * When adding new operations, add a new case statement here to 123 * explicitly indicate whether or not the operation is safe to 124 * perform in capability mode. 125 */ 126 if (IN_CAPABILITY_MODE(td)) { 127 switch (uap->op) { 128 case ARM_SYNC_ICACHE: 129 case ARM_DRAIN_WRITEBUF: 130 case ARM_SET_TP: 131 case ARM_GET_TP: 132 break; 133 134 default: 135 #ifdef KTRACE 136 if (KTRPOINT(td, KTR_CAPFAIL)) 137 ktrcapfail(CAPFAIL_SYSCALL, NULL, NULL); 138 #endif 139 return (ECAPMODE); 140 } 141 } 142 #endif 143 144 switch (uap->op) { 145 case ARM_SYNC_ICACHE: 146 error = arm32_sync_icache(td, uap->parms); 147 break; 148 case ARM_DRAIN_WRITEBUF: 149 error = arm32_drain_writebuf(td, uap->parms); 150 break; 151 case ARM_SET_TP: 152 error = arm32_set_tp(td, uap->parms); 153 break; 154 case ARM_GET_TP: 155 error = arm32_get_tp(td, uap->parms); 156 break; 157 default: 158 error = EINVAL; 159 break; 160 } 161 return (error); 162 } 163