linux_ipccall.c revision 1.28.14.1
1 /* $NetBSD: linux_ipccall.c,v 1.28.14.1 2007/12/09 19:37:00 jmcneill 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 1.28.14.1 2007/12/09 19:37:00 jmcneill 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, void *v, register_t *retval) 90 { 91 struct linux_sys_ipc_args /* { 92 syscallarg(int) what; 93 syscallarg(int) a1; 94 syscallarg(int) a2; 95 syscallarg(int) a3; 96 syscallarg(void *) ptr; 97 } */ *uap = v; 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(l, uap, retval) 172 struct lwp *l; 173 struct linux_sys_ipc_args /* { 174 syscallarg(int) what; 175 syscallarg(int) a1; 176 syscallarg(int) a2; 177 syscallarg(int) a3; 178 syscallarg(void *) ptr; 179 } */ *uap; 180 register_t *retval; 181 { 182 struct sys_semop_args bsa; 183 184 SCARG(&bsa, semid) = SCARG(uap, a1); 185 SCARG(&bsa, sops) = (struct sembuf *)SCARG(uap, ptr); 186 SCARG(&bsa, nsops) = SCARG(uap, a2); 187 188 return sys_semop(l, &bsa, retval); 189 } 190 191 inline int 192 linux_semget(l, uap, retval) 193 struct lwp *l; 194 struct linux_sys_ipc_args /* { 195 syscallarg(int) what; 196 syscallarg(int) a1; 197 syscallarg(int) a2; 198 syscallarg(int) a3; 199 syscallarg(void *) ptr; 200 } */ *uap; 201 register_t *retval; 202 { 203 struct sys_semget_args bsa; 204 205 SCARG(&bsa, key) = (key_t)SCARG(uap, a1); 206 SCARG(&bsa, nsems) = SCARG(uap, a2); 207 SCARG(&bsa, semflg) = SCARG(uap, a3); 208 209 return sys_semget(l, &bsa, retval); 210 } 211 212 #endif /* SYSVSEM */ 213 214 #ifdef SYSVMSG 215 216 inline int 217 linux_msgsnd(l, uap, retval) 218 struct lwp *l; 219 struct linux_sys_ipc_args /* { 220 syscallarg(int) what; 221 syscallarg(int) a1; 222 syscallarg(int) a2; 223 syscallarg(int) a3; 224 syscallarg(void *) ptr; 225 } */ *uap; 226 register_t *retval; 227 { 228 struct sys_msgsnd_args bma; 229 230 SCARG(&bma, msqid) = SCARG(uap, a1); 231 SCARG(&bma, msgp) = SCARG(uap, ptr); 232 SCARG(&bma, msgsz) = SCARG(uap, a2); 233 SCARG(&bma, msgflg) = SCARG(uap, a3); 234 235 return sys_msgsnd(l, &bma, retval); 236 } 237 238 inline int 239 linux_msgrcv(l, uap, retval) 240 struct lwp *l; 241 struct linux_sys_ipc_args /* { 242 syscallarg(int) what; 243 syscallarg(int) a1; 244 syscallarg(int) a2; 245 syscallarg(int) a3; 246 syscallarg(void *) ptr; 247 } */ *uap; 248 register_t *retval; 249 { 250 struct sys_msgrcv_args bma; 251 struct linux_msgrcv_msgarg kluge; 252 int error; 253 254 if ((error = copyin(SCARG(uap, ptr), &kluge, sizeof kluge))) 255 return error; 256 257 SCARG(&bma, msqid) = SCARG(uap, a1); 258 SCARG(&bma, msgp) = kluge.msg; 259 SCARG(&bma, msgsz) = SCARG(uap, a2); 260 SCARG(&bma, msgtyp) = kluge.type; 261 SCARG(&bma, msgflg) = SCARG(uap, a3); 262 263 return sys_msgrcv(l, &bma, retval); 264 } 265 266 inline int 267 linux_msgget(l, uap, retval) 268 struct lwp *l; 269 struct linux_sys_ipc_args /* { 270 syscallarg(int) what; 271 syscallarg(int) a1; 272 syscallarg(int) a2; 273 syscallarg(int) a3; 274 syscallarg(void *) ptr; 275 } */ *uap; 276 register_t *retval; 277 { 278 struct sys_msgget_args bma; 279 280 SCARG(&bma, key) = (key_t)SCARG(uap, a1); 281 SCARG(&bma, msgflg) = SCARG(uap, a2); 282 283 return sys_msgget(l, &bma, retval); 284 } 285 286 #endif /* SYSVMSG */ 287 288 #ifdef SYSVSHM 289 /* 290 * shmdt(): this could have been mapped directly, if it wasn't for 291 * the extra indirection by the linux_ipc system call. 292 */ 293 inline int 294 linux_shmdt(l, uap, retval) 295 struct lwp *l; 296 struct linux_sys_ipc_args /* { 297 syscallarg(int) what; 298 syscallarg(int) a1; 299 syscallarg(int) a2; 300 syscallarg(int) a3; 301 syscallarg(void *) ptr; 302 } */ *uap; 303 register_t *retval; 304 { 305 struct sys_shmdt_args bsa; 306 307 SCARG(&bsa, shmaddr) = SCARG(uap, ptr); 308 309 return sys_shmdt(l, &bsa, retval); 310 } 311 312 /* 313 * Same story as shmdt. 314 */ 315 inline int 316 linux_shmget(l, uap, retval) 317 struct lwp *l; 318 struct linux_sys_ipc_args /* { 319 syscallarg(int) what; 320 syscallarg(int) a1; 321 syscallarg(int) a2; 322 syscallarg(int) a3; 323 syscallarg(void *) ptr; 324 } */ *uap; 325 register_t *retval; 326 { 327 struct sys_shmget_args bsa; 328 329 SCARG(&bsa, key) = SCARG(uap, a1); 330 SCARG(&bsa, size) = SCARG(uap, a2); 331 SCARG(&bsa, shmflg) = SCARG(uap, a3); 332 333 return linux_sys_shmget(l, &bsa, retval); 334 } 335 336 #endif /* SYSVSHM */ 337
Indexes created Tue Sep 23 14:10:03 GMT 2025