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