147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
* Copyright (C) 1994 - 2000, 2006 Ralf Baechle
|
|
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
|
|
* Copyright (C) 2016, Imagination Technologies Ltd.
|
|
*/
|
|
#include <linux/compiler.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/signal.h>
|
|
#include <linux/syscalls.h>
|
|
|
|
#include <asm/compat.h>
|
|
#include <asm/compat-signal.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/unistd.h>
|
|
|
|
#include "signal-common.h"
|
|
|
|
/* 32-bit compatibility types */
|
|
|
|
typedef unsigned int __sighandler32_t;
|
|
typedef void (*vfptr_t)(void);
|
|
|
|
/*
|
|
* Atomically swap in the new signal mask, and wait for a signal.
|
|
*/
|
|
|
|
asmlinkage int sys32_sigsuspend(compat_sigset_t __user *uset)
|
|
{
|
|
return compat_sys_rt_sigsuspend(uset, sizeof(compat_sigset_t));
|
|
}
|
|
|
|
SYSCALL_DEFINE3(32_sigaction, long, sig, const struct compat_sigaction __user *, act,
|
|
struct compat_sigaction __user *, oact)
|
|
{
|
|
struct k_sigaction new_ka, old_ka;
|
|
int ret;
|
|
int err = 0;
|
|
|
|
if (act) {
|
|
old_sigset_t mask;
|
|
s32 handler;
|
|
|
|
if (!access_ok(VERIFY_READ, act, sizeof(*act)))
|
|
return -EFAULT;
|
|
err |= __get_user(handler, &act->sa_handler);
|
|
new_ka.sa.sa_handler = (void __user *)(s64)handler;
|
|
err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
|
|
err |= __get_user(mask, &act->sa_mask.sig[0]);
|
|
if (err)
|
|
return -EFAULT;
|
|
|
|
siginitset(&new_ka.sa.sa_mask, mask);
|
|
}
|
|
|
|
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
|
|
|
|
if (!ret && oact) {
|
|
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
|
|
return -EFAULT;
|
|
err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
|
|
err |= __put_user((u32)(u64)old_ka.sa.sa_handler,
|
|
&oact->sa_handler);
|
|
err |= __put_user(old_ka.sa.sa_mask.sig[0], oact->sa_mask.sig);
|
|
err |= __put_user(0, &oact->sa_mask.sig[1]);
|
|
err |= __put_user(0, &oact->sa_mask.sig[2]);
|
|
err |= __put_user(0, &oact->sa_mask.sig[3]);
|
|
if (err)
|
|
return -EFAULT;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from)
|
|
{
|
|
int err;
|
|
|
|
if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
|
|
return -EFAULT;
|
|
|
|
/* If you change siginfo_t structure, please be sure
|
|
this code is fixed accordingly.
|
|
It should never copy any pad contained in the structure
|
|
to avoid security leaks, but must copy the generic
|
|
3 ints plus the relevant union member.
|
|
This routine must convert siginfo from 64bit to 32bit as well
|
|
at the same time. */
|
|
err = __put_user(from->si_signo, &to->si_signo);
|
|
err |= __put_user(from->si_errno, &to->si_errno);
|
|
err |= __put_user((short)from->si_code, &to->si_code);
|
|
if (from->si_code < 0)
|
|
err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
|
|
else {
|
|
switch (from->si_code >> 16) {
|
|
case __SI_TIMER >> 16:
|
|
err |= __put_user(from->si_tid, &to->si_tid);
|
|
err |= __put_user(from->si_overrun, &to->si_overrun);
|
|
err |= __put_user(from->si_int, &to->si_int);
|
|
break;
|
|
case __SI_CHLD >> 16:
|
|
err |= __put_user(from->si_utime, &to->si_utime);
|
|
err |= __put_user(from->si_stime, &to->si_stime);
|
|
err |= __put_user(from->si_status, &to->si_status);
|
|
default:
|
|
err |= __put_user(from->si_pid, &to->si_pid);
|
|
err |= __put_user(from->si_uid, &to->si_uid);
|
|
break;
|
|
case __SI_FAULT >> 16:
|
|
err |= __put_user((unsigned long)from->si_addr, &to->si_addr);
|
|
break;
|
|
case __SI_POLL >> 16:
|
|
err |= __put_user(from->si_band, &to->si_band);
|
|
err |= __put_user(from->si_fd, &to->si_fd);
|
|
break;
|
|
case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
|
|
case __SI_MESGQ >> 16:
|
|
err |= __put_user(from->si_pid, &to->si_pid);
|
|
err |= __put_user(from->si_uid, &to->si_uid);
|
|
err |= __put_user(from->si_int, &to->si_int);
|
|
break;
|
|
case __SI_SYS >> 16:
|
|
err |= __copy_to_user(&to->si_call_addr, &from->si_call_addr,
|
|
sizeof(compat_uptr_t));
|
|
err |= __put_user(from->si_syscall, &to->si_syscall);
|
|
err |= __put_user(from->si_arch, &to->si_arch);
|
|
break;
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
|
|
{
|
|
if (copy_from_user(to, from, 3*sizeof(int)) ||
|
|
copy_from_user(to->_sifields._pad,
|
|
from->_sifields._pad, SI_PAD_SIZE32))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|