377 lines
8.6 KiB
C
377 lines
8.6 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/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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/*** 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);
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mb->mtype = mb32.mtype;
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err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
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if (err)
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err = -EFAULT;
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else
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KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);
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kfree(mb);
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return err;
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}
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asmlinkage long sys32_msgrcv(int msqid,
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struct msgbuf32 __user *umsgp32,
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size_t msgsz, long msgtyp, 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, len;
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if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
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return -ENOMEM;
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KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);
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if (err >= 0) {
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len = err;
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mb32.mtype = mb->mtype;
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err = put_user(mb32.mtype, &umsgp32->mtype);
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err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
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if (err)
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err = -EFAULT;
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else
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err = len;
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}
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kfree(mb);
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return err;
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}
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asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
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{
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mm_segment_t old_fs = get_fs();
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int ret;
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off_t of;
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if (offset && get_user(of, offset))
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return -EFAULT;
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set_fs(KERNEL_DS);
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ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
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set_fs(old_fs);
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if (offset && put_user(of, offset))
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return -EFAULT;
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return ret;
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}
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asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
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{
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mm_segment_t old_fs = get_fs();
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int ret;
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loff_t lof;
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if (offset && get_user(lof, offset))
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return -EFAULT;
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set_fs(KERNEL_DS);
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ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
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set_fs(old_fs);
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if (offset && put_user(lof, offset))
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return -EFAULT;
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return ret;
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}
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/* lseek() needs a wrapper because 'offset' can be negative, but the top
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* half of the argument has been zeroed by syscall.S.
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*/
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asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
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{
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return sys_lseek(fd, offset, origin);
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}
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asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
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{
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union semun u;
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if (cmd == SETVAL) {
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/* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
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* The int should be in the first 4, but our argument
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* frobbing has left it in the last 4.
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*/
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u.val = *((int *)&arg + 1);
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return sys_semctl (semid, semnum, cmd, u);
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}
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return sys_semctl (semid, semnum, cmd, arg);
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}
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long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
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size_t len)
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{
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return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
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buf, len);
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}
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asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
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u32 lenhi, u32 lenlo)
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{
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return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
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((loff_t)lenhi << 32) | lenlo);
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}
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