linux_ipccall.c revision 1.29.4.1
1 /* $NetBSD: linux_ipccall.c,v 1.29.4.1 2008/01/02 21:52:35 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: linux_ipccall.c,v 1.29.4.1 2008/01/02 21:52:35 bouyer Exp $"); 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_sysv.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/shm.h> 48 #include <sys/sem.h> 49 #include <sys/msg.h> 50 #include <sys/proc.h> 51 #include <sys/systm.h> 52 53 /* real syscalls */ 54 #include <sys/mount.h> 55 #include <sys/syscallargs.h> 56 57 /* sys_ipc + args prototype */ 58 #include <compat/linux/common/linux_types.h> 59 #include <compat/linux/common/linux_signal.h> 60 61 #include <compat/linux/linux_syscallargs.h> 62 #include <compat/linux/linux_syscall.h> 63 64 /* general ipc defines */ 65 #include <compat/linux/common/linux_ipc.h> 66 67 /* prototypes for real/normal linux-emul syscalls */ 68 #include <compat/linux/common/linux_msg.h> 69 #include <compat/linux/common/linux_shm.h> 70 #include <compat/linux/common/linux_sem.h> 71 72 /* prototypes for sys_ipc stuff */ 73 #include <compat/linux/common/linux_ipccall.h> 74 75 /* Used on: arm, i386, m68k, mips, ppc, sparc, sparc64 */ 76 /* Not used on: alpha */ 77 78 /* 79 * Stuff to deal with the SysV ipc/shm/semaphore interface in Linux. 80 * The main difference is, that Linux handles it all via one 81 * system call, which has the usual maximum amount of 5 arguments. 82 * This results in a kludge for calls that take 6 of them. 83 * 84 * The SYSV??? options have to be enabled to get the appropriate 85 * functions to work. 86 */ 87 88 int 89 linux_sys_ipc(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval) 90 { 91 /* { 92 syscallarg(int) what; 93 syscallarg(int) a1; 94 syscallarg(int) a2; 95 syscallarg(int) a3; 96 syscallarg(void *) ptr; 97 } */ 98 99 switch (SCARG(uap, what)) { 100 #ifdef SYSVSEM 101 case LINUX_SYS_semop: 102 return linux_semop(l, uap, retval); 103 case LINUX_SYS_semget: 104 return linux_semget(l, uap, retval); 105 case LINUX_SYS_semctl: { 106 struct linux_sys_semctl_args bsa; 107 union linux_semun arg; 108 int error; 109 110 SCARG(&bsa, semid) = SCARG(uap, a1); 111 SCARG(&bsa, semnum) = SCARG(uap, a2); 112 SCARG(&bsa, cmd) = SCARG(uap, a3); 113 /* Convert from (union linux_semun *) to (union linux_semun) */ 114 if ((error = copyin(SCARG(uap, ptr), &arg, sizeof arg))) 115 return error; 116 SCARG(&bsa, arg) = arg; 117 118 return linux_sys_semctl(l, &bsa, retval); 119 } 120 #endif 121 #ifdef SYSVMSG 122 case LINUX_SYS_msgsnd: 123 return linux_msgsnd(l, uap, retval); 124 case LINUX_SYS_msgrcv: 125 return linux_msgrcv(l, uap, retval); 126 case LINUX_SYS_msgget: 127 return linux_msgget(l, uap, retval); 128 case LINUX_SYS_msgctl: { 129 struct linux_sys_msgctl_args bsa; 130 131 SCARG(&bsa, msqid) = SCARG(uap, a1); 132 SCARG(&bsa, cmd) = SCARG(uap, a2); 133 SCARG(&bsa, buf) = (struct linux_msqid_ds *)SCARG(uap, ptr); 134 135 return linux_sys_msgctl(l, &bsa, retval); 136 } 137 #endif 138 #ifdef SYSVSHM 139 case LINUX_SYS_shmat: { 140 struct linux_sys_shmat_args bsa; 141 142 SCARG(&bsa, shmid) = SCARG(uap, a1); 143 SCARG(&bsa, shmaddr) = (void *)SCARG(uap, ptr); 144 SCARG(&bsa, shmflg) = SCARG(uap, a2); 145 /* XXX passing pointer inside int here */ 146 SCARG(&bsa, raddr) = (u_long *)SCARG(uap, a3); 147 148 return linux_sys_shmat(l, &bsa, retval); 149 } 150 case LINUX_SYS_shmdt: 151 return linux_shmdt(l, uap, retval); 152 case LINUX_SYS_shmget: 153 return linux_shmget(l, uap, retval); 154 case LINUX_SYS_shmctl: { 155 struct linux_sys_shmctl_args bsa; 156 157 SCARG(&bsa, shmid) = SCARG(uap, a1); 158 SCARG(&bsa, cmd) = SCARG(uap, a2); 159 SCARG(&bsa, buf) = (struct linux_shmid_ds *)SCARG(uap, ptr); 160 161 return linux_sys_shmctl(l, &bsa, retval); 162 } 163 #endif 164 default: 165 return ENOSYS; 166 } 167 } 168 169 #ifdef SYSVSEM 170 inline int 171 linux_semop(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval) 172 { 173 /* { 174 syscallarg(int) what; 175 syscallarg(int) a1; 176 syscallarg(int) a2; 177 syscallarg(int) a3; 178 syscallarg(void *) ptr; 179 } */ 180 struct sys_semop_args bsa; 181 182 SCARG(&bsa, semid) = SCARG(uap, a1); 183 SCARG(&bsa, sops) = (struct sembuf *)SCARG(uap, ptr); 184 SCARG(&bsa, nsops) = SCARG(uap, a2); 185 186 return sys_semop(l, &bsa, retval); 187 } 188 189 inline int 190 linux_semget(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval) 191 { 192 /* { 193 syscallarg(int) what; 194 syscallarg(int) a1; 195 syscallarg(int) a2; 196 syscallarg(int) a3; 197 syscallarg(void *) ptr; 198 } */ 199 struct sys_semget_args bsa; 200 201 SCARG(&bsa, key) = (key_t)SCARG(uap, a1); 202 SCARG(&bsa, nsems) = SCARG(uap, a2); 203 SCARG(&bsa, semflg) = SCARG(uap, a3); 204 205 return sys_semget(l, &bsa, retval); 206 } 207 208 #endif /* SYSVSEM */ 209 210 #ifdef SYSVMSG 211 212 inline int 213 linux_msgsnd(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval) 214 { 215 struct sys_msgsnd_args bma; 216 217 SCARG(&bma, msqid) = SCARG(uap, a1); 218 SCARG(&bma, msgp) = SCARG(uap, ptr); 219 SCARG(&bma, msgsz) = SCARG(uap, a2); 220 SCARG(&bma, msgflg) = SCARG(uap, a3); 221 222 return sys_msgsnd(l, &bma, retval); 223 } 224 225 inline int 226 linux_msgrcv(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval) 227 { 228 struct sys_msgrcv_args bma; 229 struct linux_msgrcv_msgarg kluge; 230 int error; 231 232 if ((error = copyin(SCARG(uap, ptr), &kluge, sizeof kluge))) 233 return error; 234 235 SCARG(&bma, msqid) = SCARG(uap, a1); 236 SCARG(&bma, msgp) = kluge.msg; 237 SCARG(&bma, msgsz) = SCARG(uap, a2); 238 SCARG(&bma, msgtyp) = kluge.type; 239 SCARG(&bma, msgflg) = SCARG(uap, a3); 240 241 return sys_msgrcv(l, &bma, retval); 242 } 243 244 inline int 245 linux_msgget(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval) 246 { 247 struct sys_msgget_args bma; 248 249 SCARG(&bma, key) = (key_t)SCARG(uap, a1); 250 SCARG(&bma, msgflg) = SCARG(uap, a2); 251 252 return sys_msgget(l, &bma, retval); 253 } 254 255 #endif /* SYSVMSG */ 256 257 #ifdef SYSVSHM 258 /* 259 * shmdt(): this could have been mapped directly, if it wasn't for 260 * the extra indirection by the linux_ipc system call. 261 */ 262 inline int 263 linux_shmdt(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval) 264 { 265 struct sys_shmdt_args bsa; 266 267 SCARG(&bsa, shmaddr) = SCARG(uap, ptr); 268 269 return sys_shmdt(l, &bsa, retval); 270 } 271 272 /* 273 * Same story as shmdt. 274 */ 275 inline int 276 linux_shmget(struct lwp *l, const struct linux_sys_ipc_args *uap, register_t *retval) 277 { 278 struct linux_sys_shmget_args bsa; 279 280 SCARG(&bsa, key) = SCARG(uap, a1); 281 SCARG(&bsa, size) = SCARG(uap, a2); 282 SCARG(&bsa, shmflg) = SCARG(uap, a3); 283 284 return linux_sys_shmget(l, &bsa, retval); 285 } 286 287 #endif /* SYSVSHM */ 288
Indexes created Tue Sep 23 07:09:52 GMT 2025