1 /* 2 * sys_parisc32.c: Conversion between 32bit and 64bit native syscalls. 3 * 4 * Copyright (C) 2000-2001 Hewlett Packard Company 5 * Copyright (C) 2000 John Marvin 6 * Copyright (C) 2001 Matthew Wilcox 7 * 8 * These routines maintain argument size conversion between 32bit and 64bit 9 * environment. Based heavily on sys_ia32.c and sys_sparc32.c. 10 */ 11 12 #include <linux/compat.h> 13 #include <linux/kernel.h> 14 #include <linux/sched.h> 15 #include <linux/fs.h> 16 #include <linux/mm.h> 17 #include <linux/file.h> 18 #include <linux/signal.h> 19 #include <linux/resource.h> 20 #include <linux/times.h> 21 #include <linux/utsname.h> 22 #include <linux/time.h> 23 #include <linux/smp.h> 24 #include <linux/smp_lock.h> 25 #include <linux/sem.h> 26 #include <linux/msg.h> 27 #include <linux/shm.h> 28 #include <linux/slab.h> 29 #include <linux/uio.h> 30 #include <linux/nfs_fs.h> 31 #include <linux/ncp_fs.h> 32 #include <linux/sunrpc/svc.h> 33 #include <linux/nfsd/nfsd.h> 34 #include <linux/nfsd/cache.h> 35 #include <linux/nfsd/xdr.h> 36 #include <linux/nfsd/syscall.h> 37 #include <linux/poll.h> 38 #include <linux/personality.h> 39 #include <linux/stat.h> 40 #include <linux/highmem.h> 41 #include <linux/highuid.h> 42 #include <linux/mman.h> 43 #include <linux/binfmts.h> 44 #include <linux/namei.h> 45 #include <linux/vfs.h> 46 #include <linux/ptrace.h> 47 #include <linux/swap.h> 48 #include <linux/syscalls.h> 49 50 #include <asm/types.h> 51 #include <asm/uaccess.h> 52 #include <asm/mmu_context.h> 53 54 #include "sys32.h" 55 56 #undef DEBUG 57 58 #ifdef DEBUG 59 #define DBG(x) printk x 60 #else 61 #define DBG(x) 62 #endif 63 64 /* 65 * sys32_execve() executes a new program. 66 */ 67 68 asmlinkage int sys32_execve(struct pt_regs *regs) 69 { 70 int error; 71 char *filename; 72 73 DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26])); 74 filename = getname((const char __user *) regs->gr[26]); 75 error = PTR_ERR(filename); 76 if (IS_ERR(filename)) 77 goto out; 78 error = compat_do_execve(filename, compat_ptr(regs->gr[25]), 79 compat_ptr(regs->gr[24]), regs); 80 putname(filename); 81 out: 82 83 return error; 84 } 85 86 asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23, 87 int r22, int r21, int r20) 88 { 89 printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n", 90 current->comm, current->pid, r20); 91 return -ENOSYS; 92 } 93 94 #ifdef CONFIG_SYSCTL 95 96 struct __sysctl_args32 { 97 u32 name; 98 int nlen; 99 u32 oldval; 100 u32 oldlenp; 101 u32 newval; 102 u32 newlen; 103 u32 __unused[4]; 104 }; 105 106 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args) 107 { 108 #ifndef CONFIG_SYSCTL_SYSCALL 109 return -ENOSYS; 110 #else 111 struct __sysctl_args32 tmp; 112 int error; 113 unsigned int oldlen32; 114 size_t oldlen, __user *oldlenp = NULL; 115 unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7; 116 117 DBG(("sysctl32(%p)\n", args)); 118 119 if (copy_from_user(&tmp, args, sizeof(tmp))) 120 return -EFAULT; 121 122 if (tmp.oldval && tmp.oldlenp) { 123 /* Duh, this is ugly and might not work if sysctl_args 124 is in read-only memory, but do_sysctl does indirectly 125 a lot of uaccess in both directions and we'd have to 126 basically copy the whole sysctl.c here, and 127 glibc's __sysctl uses rw memory for the structure 128 anyway. */ 129 /* a possibly better hack than this, which will avoid the 130 * problem if the struct is read only, is to push the 131 * 'oldlen' value out to the user's stack instead. -PB 132 */ 133 if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp)) 134 return -EFAULT; 135 oldlen = oldlen32; 136 if (put_user(oldlen, (size_t *)addr)) 137 return -EFAULT; 138 oldlenp = (size_t *)addr; 139 } 140 141 lock_kernel(); 142 error = do_sysctl((int __user *)(u64)tmp.name, tmp.nlen, 143 (void __user *)(u64)tmp.oldval, oldlenp, 144 (void __user *)(u64)tmp.newval, tmp.newlen); 145 unlock_kernel(); 146 if (oldlenp) { 147 if (!error) { 148 if (get_user(oldlen, (size_t *)addr)) { 149 error = -EFAULT; 150 } else { 151 oldlen32 = oldlen; 152 if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp)) 153 error = -EFAULT; 154 } 155 } 156 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused))) 157 error = -EFAULT; 158 } 159 return error; 160 #endif 161 } 162 163 #endif /* CONFIG_SYSCTL */ 164 165 asmlinkage long sys32_sched_rr_get_interval(pid_t pid, 166 struct compat_timespec __user *interval) 167 { 168 struct timespec t; 169 int ret; 170 171 KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t); 172 if (put_compat_timespec(&t, interval)) 173 return -EFAULT; 174 return ret; 175 } 176 177 struct msgbuf32 { 178 int mtype; 179 char mtext[1]; 180 }; 181 182 asmlinkage long sys32_msgsnd(int msqid, 183 struct msgbuf32 __user *umsgp32, 184 size_t msgsz, int msgflg) 185 { 186 struct msgbuf *mb; 187 struct msgbuf32 mb32; 188 int err; 189 190 if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL) 191 return -ENOMEM; 192 193 err = get_user(mb32.mtype, &umsgp32->mtype); 194 mb->mtype = mb32.mtype; 195 err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz); 196 197 if (err) 198 err = -EFAULT; 199 else 200 KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg); 201 202 kfree(mb); 203 return err; 204 } 205 206 asmlinkage long sys32_msgrcv(int msqid, 207 struct msgbuf32 __user *umsgp32, 208 size_t msgsz, long msgtyp, int msgflg) 209 { 210 struct msgbuf *mb; 211 struct msgbuf32 mb32; 212 int err, len; 213 214 if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL) 215 return -ENOMEM; 216 217 KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg); 218 219 if (err >= 0) { 220 len = err; 221 mb32.mtype = mb->mtype; 222 err = put_user(mb32.mtype, &umsgp32->mtype); 223 err |= copy_to_user(&umsgp32->mtext, mb->mtext, len); 224 if (err) 225 err = -EFAULT; 226 else 227 err = len; 228 } 229 230 kfree(mb); 231 return err; 232 } 233 234 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count) 235 { 236 mm_segment_t old_fs = get_fs(); 237 int ret; 238 off_t of; 239 240 if (offset && get_user(of, offset)) 241 return -EFAULT; 242 243 set_fs(KERNEL_DS); 244 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); 245 set_fs(old_fs); 246 247 if (offset && put_user(of, offset)) 248 return -EFAULT; 249 250 return ret; 251 } 252 253 asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count) 254 { 255 mm_segment_t old_fs = get_fs(); 256 int ret; 257 loff_t lof; 258 259 if (offset && get_user(lof, offset)) 260 return -EFAULT; 261 262 set_fs(KERNEL_DS); 263 ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count); 264 set_fs(old_fs); 265 266 if (offset && put_user(lof, offset)) 267 return -EFAULT; 268 269 return ret; 270 } 271 272 273 /* lseek() needs a wrapper because 'offset' can be negative, but the top 274 * half of the argument has been zeroed by syscall.S. 275 */ 276 277 asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin) 278 { 279 return sys_lseek(fd, offset, origin); 280 } 281 282 asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg) 283 { 284 union semun u; 285 286 if (cmd == SETVAL) { 287 /* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes. 288 * The int should be in the first 4, but our argument 289 * frobbing has left it in the last 4. 290 */ 291 u.val = *((int *)&arg + 1); 292 return sys_semctl (semid, semnum, cmd, u); 293 } 294 return sys_semctl (semid, semnum, cmd, arg); 295 } 296 297 long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf, 298 size_t len) 299 { 300 return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low, 301 buf, len); 302 } 303 304 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, 305 u32 lenhi, u32 lenlo) 306 { 307 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, 308 ((loff_t)lenhi << 32) | lenlo); 309 } 310