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/time.h> 22 #include <linux/smp.h> 23 #include <linux/smp_lock.h> 24 #include <linux/sem.h> 25 #include <linux/msg.h> 26 #include <linux/shm.h> 27 #include <linux/slab.h> 28 #include <linux/uio.h> 29 #include <linux/nfs_fs.h> 30 #include <linux/ncp_fs.h> 31 #include <linux/sunrpc/svc.h> 32 #include <linux/nfsd/nfsd.h> 33 #include <linux/nfsd/cache.h> 34 #include <linux/nfsd/xdr.h> 35 #include <linux/nfsd/syscall.h> 36 #include <linux/poll.h> 37 #include <linux/personality.h> 38 #include <linux/stat.h> 39 #include <linux/highmem.h> 40 #include <linux/highuid.h> 41 #include <linux/mman.h> 42 #include <linux/binfmts.h> 43 #include <linux/namei.h> 44 #include <linux/vfs.h> 45 #include <linux/ptrace.h> 46 #include <linux/swap.h> 47 #include <linux/syscalls.h> 48 49 #include <asm/types.h> 50 #include <asm/uaccess.h> 51 #include <asm/mmu_context.h> 52 53 #include "sys32.h" 54 55 #undef DEBUG 56 57 #ifdef DEBUG 58 #define DBG(x) printk x 59 #else 60 #define DBG(x) 61 #endif 62 63 /* 64 * sys32_execve() executes a new program. 65 */ 66 67 asmlinkage int sys32_execve(struct pt_regs *regs) 68 { 69 int error; 70 char *filename; 71 72 DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26])); 73 filename = getname((const char __user *) regs->gr[26]); 74 error = PTR_ERR(filename); 75 if (IS_ERR(filename)) 76 goto out; 77 error = compat_do_execve(filename, compat_ptr(regs->gr[25]), 78 compat_ptr(regs->gr[24]), regs); 79 putname(filename); 80 out: 81 82 return error; 83 } 84 85 asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23, 86 int r22, int r21, int r20) 87 { 88 printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n", 89 current->comm, current->pid, r20); 90 return -ENOSYS; 91 } 92 93 asmlinkage long sys32_sched_rr_get_interval(pid_t pid, 94 struct compat_timespec __user *interval) 95 { 96 struct timespec t; 97 int ret; 98 99 KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t); 100 if (put_compat_timespec(&t, interval)) 101 return -EFAULT; 102 return ret; 103 } 104 105 struct msgbuf32 { 106 int mtype; 107 char mtext[1]; 108 }; 109 110 asmlinkage long sys32_msgsnd(int msqid, 111 struct msgbuf32 __user *umsgp32, 112 size_t msgsz, int msgflg) 113 { 114 struct msgbuf *mb; 115 struct msgbuf32 mb32; 116 int err; 117 118 if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL) 119 return -ENOMEM; 120 121 err = get_user(mb32.mtype, &umsgp32->mtype); 122 mb->mtype = mb32.mtype; 123 err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz); 124 125 if (err) 126 err = -EFAULT; 127 else 128 KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg); 129 130 kfree(mb); 131 return err; 132 } 133 134 asmlinkage long sys32_msgrcv(int msqid, 135 struct msgbuf32 __user *umsgp32, 136 size_t msgsz, long msgtyp, int msgflg) 137 { 138 struct msgbuf *mb; 139 struct msgbuf32 mb32; 140 int err, len; 141 142 if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL) 143 return -ENOMEM; 144 145 KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg); 146 147 if (err >= 0) { 148 len = err; 149 mb32.mtype = mb->mtype; 150 err = put_user(mb32.mtype, &umsgp32->mtype); 151 err |= copy_to_user(&umsgp32->mtext, mb->mtext, len); 152 if (err) 153 err = -EFAULT; 154 else 155 err = len; 156 } 157 158 kfree(mb); 159 return err; 160 } 161 162 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count) 163 { 164 mm_segment_t old_fs = get_fs(); 165 int ret; 166 off_t of; 167 168 if (offset && get_user(of, offset)) 169 return -EFAULT; 170 171 set_fs(KERNEL_DS); 172 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); 173 set_fs(old_fs); 174 175 if (offset && put_user(of, offset)) 176 return -EFAULT; 177 178 return ret; 179 } 180 181 asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count) 182 { 183 mm_segment_t old_fs = get_fs(); 184 int ret; 185 loff_t lof; 186 187 if (offset && get_user(lof, offset)) 188 return -EFAULT; 189 190 set_fs(KERNEL_DS); 191 ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count); 192 set_fs(old_fs); 193 194 if (offset && put_user(lof, offset)) 195 return -EFAULT; 196 197 return ret; 198 } 199 200 201 /* lseek() needs a wrapper because 'offset' can be negative, but the top 202 * half of the argument has been zeroed by syscall.S. 203 */ 204 205 asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin) 206 { 207 return sys_lseek(fd, offset, origin); 208 } 209 210 asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg) 211 { 212 union semun u; 213 214 if (cmd == SETVAL) { 215 /* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes. 216 * The int should be in the first 4, but our argument 217 * frobbing has left it in the last 4. 218 */ 219 u.val = *((int *)&arg + 1); 220 return sys_semctl (semid, semnum, cmd, u); 221 } 222 return sys_semctl (semid, semnum, cmd, arg); 223 } 224 225 long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf, 226 size_t len) 227 { 228 return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low, 229 buf, len); 230 } 231 232 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, 233 u32 lenhi, u32 lenlo) 234 { 235 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, 236 ((loff_t)lenhi << 32) | lenlo); 237 } 238