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