617 строки
14 KiB
C
617 строки
14 KiB
C
/*
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* sys_parisc32.c: Conversion between 32bit and 64bit native syscalls.
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*
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* Copyright (C) 2000-2001 Hewlett Packard Company
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* Copyright (C) 2000 John Marvin
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* Copyright (C) 2001 Matthew Wilcox
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*
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* These routines maintain argument size conversion between 32bit and 64bit
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* environment. Based heavily on sys_ia32.c and sys_sparc32.c.
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*/
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#include <linux/compat.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/file.h>
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#include <linux/signal.h>
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#include <linux/resource.h>
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#include <linux/times.h>
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#include <linux/utsname.h>
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#include <linux/time.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/slab.h>
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#include <linux/uio.h>
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#include <linux/nfs_fs.h>
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#include <linux/ncp_fs.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/nfsd/nfsd.h>
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#include <linux/nfsd/cache.h>
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#include <linux/nfsd/xdr.h>
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#include <linux/nfsd/syscall.h>
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#include <linux/poll.h>
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#include <linux/personality.h>
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#include <linux/stat.h>
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#include <linux/highmem.h>
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#include <linux/highuid.h>
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#include <linux/mman.h>
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#include <linux/binfmts.h>
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#include <linux/namei.h>
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#include <linux/vfs.h>
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#include <linux/ptrace.h>
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#include <linux/swap.h>
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#include <linux/syscalls.h>
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#include <asm/types.h>
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#include <asm/uaccess.h>
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#include <asm/semaphore.h>
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#include <asm/mmu_context.h>
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#include "sys32.h"
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(x) printk x
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#else
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#define DBG(x)
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#endif
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/*
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* sys32_execve() executes a new program.
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*/
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asmlinkage int sys32_execve(struct pt_regs *regs)
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{
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int error;
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char *filename;
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DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
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filename = getname((const char __user *) regs->gr[26]);
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error = PTR_ERR(filename);
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if (IS_ERR(filename))
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goto out;
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error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
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compat_ptr(regs->gr[24]), regs);
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if (error == 0) {
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task_lock(current);
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current->ptrace &= ~PT_DTRACE;
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task_unlock(current);
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}
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putname(filename);
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out:
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return error;
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}
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asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
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int r22, int r21, int r20)
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{
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printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n",
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current->comm, current->pid, r20);
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return -ENOSYS;
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}
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#ifdef CONFIG_SYSCTL
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struct __sysctl_args32 {
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u32 name;
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int nlen;
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u32 oldval;
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u32 oldlenp;
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u32 newval;
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u32 newlen;
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u32 __unused[4];
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};
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asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
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{
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#ifndef CONFIG_SYSCTL_SYSCALL
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return -ENOSYS;
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#else
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struct __sysctl_args32 tmp;
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int error;
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unsigned int oldlen32;
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size_t oldlen, __user *oldlenp = NULL;
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unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7;
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DBG(("sysctl32(%p)\n", args));
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if (copy_from_user(&tmp, args, sizeof(tmp)))
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return -EFAULT;
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if (tmp.oldval && tmp.oldlenp) {
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/* Duh, this is ugly and might not work if sysctl_args
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is in read-only memory, but do_sysctl does indirectly
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a lot of uaccess in both directions and we'd have to
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basically copy the whole sysctl.c here, and
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glibc's __sysctl uses rw memory for the structure
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anyway. */
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/* a possibly better hack than this, which will avoid the
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* problem if the struct is read only, is to push the
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* 'oldlen' value out to the user's stack instead. -PB
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*/
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if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
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return -EFAULT;
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oldlen = oldlen32;
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if (put_user(oldlen, (size_t *)addr))
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return -EFAULT;
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oldlenp = (size_t *)addr;
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}
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lock_kernel();
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error = do_sysctl((int __user *)(u64)tmp.name, tmp.nlen,
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(void __user *)(u64)tmp.oldval, oldlenp,
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(void __user *)(u64)tmp.newval, tmp.newlen);
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unlock_kernel();
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if (oldlenp) {
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if (!error) {
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if (get_user(oldlen, (size_t *)addr)) {
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error = -EFAULT;
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} else {
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oldlen32 = oldlen;
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if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
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error = -EFAULT;
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}
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}
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if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
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error = -EFAULT;
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}
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return error;
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#endif
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}
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#endif /* CONFIG_SYSCTL */
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asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
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struct compat_timespec __user *interval)
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{
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struct timespec t;
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int ret;
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KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
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if (put_compat_timespec(&t, interval))
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return -EFAULT;
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return ret;
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}
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static int
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put_compat_timeval(struct compat_timeval __user *u, struct timeval *t)
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{
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struct compat_timeval t32;
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t32.tv_sec = t->tv_sec;
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t32.tv_usec = t->tv_usec;
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return copy_to_user(u, &t32, sizeof t32);
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}
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static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
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{
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long usec;
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if (__get_user(o->tv_sec, &i->tv_sec))
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return -EFAULT;
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if (__get_user(usec, &i->tv_usec))
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return -EFAULT;
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o->tv_nsec = usec * 1000;
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return 0;
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}
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asmlinkage int
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sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
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{
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extern void do_gettimeofday(struct timeval *tv);
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if (tv) {
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struct timeval ktv;
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do_gettimeofday(&ktv);
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if (put_compat_timeval(tv, &ktv))
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return -EFAULT;
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}
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if (tz) {
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extern struct timezone sys_tz;
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if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
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return -EFAULT;
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}
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return 0;
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}
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asmlinkage
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int sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
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{
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struct timespec kts;
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struct timezone ktz;
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if (tv) {
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if (get_ts32(&kts, tv))
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return -EFAULT;
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}
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if (tz) {
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if (copy_from_user(&ktz, tz, sizeof(ktz)))
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return -EFAULT;
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}
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return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
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}
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int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
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{
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compat_ino_t ino;
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int err;
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if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
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!new_valid_dev(stat->rdev))
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return -EOVERFLOW;
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ino = stat->ino;
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if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
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return -EOVERFLOW;
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err = put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
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err |= put_user(ino, &statbuf->st_ino);
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err |= put_user(stat->mode, &statbuf->st_mode);
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err |= put_user(stat->nlink, &statbuf->st_nlink);
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err |= put_user(0, &statbuf->st_reserved1);
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err |= put_user(0, &statbuf->st_reserved2);
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err |= put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
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err |= put_user(stat->size, &statbuf->st_size);
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err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
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err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
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err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
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err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
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err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
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err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
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err |= put_user(stat->blksize, &statbuf->st_blksize);
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err |= put_user(stat->blocks, &statbuf->st_blocks);
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err |= put_user(0, &statbuf->__unused1);
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err |= put_user(0, &statbuf->__unused2);
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err |= put_user(0, &statbuf->__unused3);
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err |= put_user(0, &statbuf->__unused4);
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err |= put_user(0, &statbuf->__unused5);
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err |= put_user(0, &statbuf->st_fstype); /* not avail */
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err |= put_user(0, &statbuf->st_realdev); /* not avail */
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err |= put_user(0, &statbuf->st_basemode); /* not avail */
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err |= put_user(0, &statbuf->st_spareshort);
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err |= put_user(stat->uid, &statbuf->st_uid);
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err |= put_user(stat->gid, &statbuf->st_gid);
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err |= put_user(0, &statbuf->st_spare4[0]);
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err |= put_user(0, &statbuf->st_spare4[1]);
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err |= put_user(0, &statbuf->st_spare4[2]);
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return err;
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}
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struct linux32_dirent {
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u32 d_ino;
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compat_off_t d_off;
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u16 d_reclen;
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char d_name[1];
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};
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struct old_linux32_dirent {
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u32 d_ino;
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u32 d_offset;
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u16 d_namlen;
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char d_name[1];
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};
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struct getdents32_callback {
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struct linux32_dirent __user * current_dir;
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struct linux32_dirent __user * previous;
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int count;
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int error;
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};
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struct readdir32_callback {
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struct old_linux32_dirent __user * dirent;
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int count;
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};
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#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
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static int filldir32 (void *__buf, const char *name, int namlen,
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loff_t offset, u64 ino, unsigned int d_type)
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{
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struct linux32_dirent __user * dirent;
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struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
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int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 1, 4);
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u32 d_ino;
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buf->error = -EINVAL; /* only used if we fail.. */
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if (reclen > buf->count)
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return -EINVAL;
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d_ino = ino;
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if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
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return -EOVERFLOW;
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dirent = buf->previous;
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if (dirent)
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put_user(offset, &dirent->d_off);
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dirent = buf->current_dir;
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buf->previous = dirent;
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put_user(d_ino, &dirent->d_ino);
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put_user(reclen, &dirent->d_reclen);
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copy_to_user(dirent->d_name, name, namlen);
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put_user(0, dirent->d_name + namlen);
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dirent = ((void __user *)dirent) + reclen;
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buf->current_dir = dirent;
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buf->count -= reclen;
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return 0;
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}
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asmlinkage long
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sys32_getdents (unsigned int fd, void __user * dirent, unsigned int count)
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{
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struct file * file;
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struct linux32_dirent __user * lastdirent;
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struct getdents32_callback buf;
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int error;
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error = -EFAULT;
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if (!access_ok(VERIFY_WRITE, dirent, count))
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goto out;
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error = -EBADF;
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file = fget(fd);
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if (!file)
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goto out;
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buf.current_dir = (struct linux32_dirent __user *) dirent;
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buf.previous = NULL;
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buf.count = count;
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buf.error = 0;
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error = vfs_readdir(file, filldir32, &buf);
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if (error < 0)
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goto out_putf;
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error = buf.error;
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lastdirent = buf.previous;
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if (lastdirent) {
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if (put_user(file->f_pos, &lastdirent->d_off))
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error = -EFAULT;
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else
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error = count - buf.count;
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}
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out_putf:
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fput(file);
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out:
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return error;
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}
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static int fillonedir32(void * __buf, const char * name, int namlen,
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loff_t offset, u64 ino, unsigned int d_type)
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{
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struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
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struct old_linux32_dirent __user * dirent;
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u32 d_ino;
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if (buf->count)
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return -EINVAL;
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d_ino = ino;
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if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
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return -EOVERFLOW;
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buf->count++;
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dirent = buf->dirent;
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put_user(d_ino, &dirent->d_ino);
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put_user(offset, &dirent->d_offset);
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put_user(namlen, &dirent->d_namlen);
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copy_to_user(dirent->d_name, name, namlen);
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put_user(0, dirent->d_name + namlen);
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return 0;
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}
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asmlinkage long
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sys32_readdir (unsigned int fd, void __user * dirent, unsigned int count)
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{
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int error;
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struct file * file;
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struct readdir32_callback buf;
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error = -EBADF;
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file = fget(fd);
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if (!file)
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goto out;
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buf.count = 0;
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buf.dirent = dirent;
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error = vfs_readdir(file, fillonedir32, &buf);
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if (error >= 0)
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error = buf.count;
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fput(file);
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out:
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return error;
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}
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/*** copied from mips64 ***/
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/*
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* Ooo, nasty. We need here to frob 32-bit unsigned longs to
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* 64-bit unsigned longs.
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*/
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static inline int
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get_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
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{
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n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
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if (ufdset) {
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unsigned long odd;
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if (!access_ok(VERIFY_WRITE, ufdset, n*sizeof(u32)))
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return -EFAULT;
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odd = n & 1UL;
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n &= ~1UL;
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while (n) {
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unsigned long h, l;
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__get_user(l, ufdset);
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__get_user(h, ufdset+1);
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ufdset += 2;
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*fdset++ = h << 32 | l;
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n -= 2;
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}
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if (odd)
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__get_user(*fdset, ufdset);
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} else {
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/* Tricky, must clear full unsigned long in the
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* kernel fdset at the end, this makes sure that
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* actually happens.
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*/
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memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32));
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}
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return 0;
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}
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static inline void
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set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
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{
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unsigned long odd;
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n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
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if (!ufdset)
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return;
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odd = n & 1UL;
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n &= ~1UL;
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while (n) {
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unsigned long h, l;
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l = *fdset++;
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h = l >> 32;
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__put_user(l, ufdset);
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__put_user(h, ufdset+1);
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ufdset += 2;
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n -= 2;
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}
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if (odd)
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__put_user(*fdset, ufdset);
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}
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struct msgbuf32 {
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int mtype;
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char mtext[1];
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};
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asmlinkage long sys32_msgsnd(int msqid,
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struct msgbuf32 __user *umsgp32,
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size_t msgsz, int msgflg)
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{
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struct msgbuf *mb;
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struct msgbuf32 mb32;
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int err;
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if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
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return -ENOMEM;
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|
|
err = get_user(mb32.mtype, &umsgp32->mtype);
|
|
mb->mtype = mb32.mtype;
|
|
err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
|
|
|
|
if (err)
|
|
err = -EFAULT;
|
|
else
|
|
KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);
|
|
|
|
kfree(mb);
|
|
return err;
|
|
}
|
|
|
|
asmlinkage long sys32_msgrcv(int msqid,
|
|
struct msgbuf32 __user *umsgp32,
|
|
size_t msgsz, long msgtyp, int msgflg)
|
|
{
|
|
struct msgbuf *mb;
|
|
struct msgbuf32 mb32;
|
|
int err, len;
|
|
|
|
if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
|
|
return -ENOMEM;
|
|
|
|
KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);
|
|
|
|
if (err >= 0) {
|
|
len = err;
|
|
mb32.mtype = mb->mtype;
|
|
err = put_user(mb32.mtype, &umsgp32->mtype);
|
|
err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
|
|
if (err)
|
|
err = -EFAULT;
|
|
else
|
|
err = len;
|
|
}
|
|
|
|
kfree(mb);
|
|
return err;
|
|
}
|
|
|
|
asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
|
|
{
|
|
mm_segment_t old_fs = get_fs();
|
|
int ret;
|
|
off_t of;
|
|
|
|
if (offset && get_user(of, offset))
|
|
return -EFAULT;
|
|
|
|
set_fs(KERNEL_DS);
|
|
ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
|
|
set_fs(old_fs);
|
|
|
|
if (offset && put_user(of, offset))
|
|
return -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
|
|
{
|
|
mm_segment_t old_fs = get_fs();
|
|
int ret;
|
|
loff_t lof;
|
|
|
|
if (offset && get_user(lof, offset))
|
|
return -EFAULT;
|
|
|
|
set_fs(KERNEL_DS);
|
|
ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
|
|
set_fs(old_fs);
|
|
|
|
if (offset && put_user(lof, offset))
|
|
return -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* lseek() needs a wrapper because 'offset' can be negative, but the top
|
|
* half of the argument has been zeroed by syscall.S.
|
|
*/
|
|
|
|
asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
|
|
{
|
|
return sys_lseek(fd, offset, origin);
|
|
}
|
|
|
|
asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
|
|
{
|
|
union semun u;
|
|
|
|
if (cmd == SETVAL) {
|
|
/* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
|
|
* The int should be in the first 4, but our argument
|
|
* frobbing has left it in the last 4.
|
|
*/
|
|
u.val = *((int *)&arg + 1);
|
|
return sys_semctl (semid, semnum, cmd, u);
|
|
}
|
|
return sys_semctl (semid, semnum, cmd, arg);
|
|
}
|
|
|
|
long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
|
|
size_t len)
|
|
{
|
|
return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
|
|
buf, len);
|
|
}
|