1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public
3*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive
4*4882a593Smuzhiyun * for more details.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Copyright (C) 1991, 1992 Linus Torvalds
7*4882a593Smuzhiyun * Copyright (C) 1994 - 2000, 2006 Ralf Baechle
8*4882a593Smuzhiyun * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
9*4882a593Smuzhiyun * Copyright (C) 2016, Imagination Technologies Ltd.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun #include <linux/compat.h>
12*4882a593Smuzhiyun #include <linux/compiler.h>
13*4882a593Smuzhiyun #include <linux/errno.h>
14*4882a593Smuzhiyun #include <linux/kernel.h>
15*4882a593Smuzhiyun #include <linux/signal.h>
16*4882a593Smuzhiyun #include <linux/syscalls.h>
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #include <asm/compat-signal.h>
19*4882a593Smuzhiyun #include <linux/uaccess.h>
20*4882a593Smuzhiyun #include <asm/unistd.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #include "signal-common.h"
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun /* 32-bit compatibility types */
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun typedef unsigned int __sighandler32_t;
27*4882a593Smuzhiyun typedef void (*vfptr_t)(void);
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun /*
30*4882a593Smuzhiyun * Atomically swap in the new signal mask, and wait for a signal.
31*4882a593Smuzhiyun */
32*4882a593Smuzhiyun
sys32_sigsuspend(compat_sigset_t __user * uset)33*4882a593Smuzhiyun asmlinkage int sys32_sigsuspend(compat_sigset_t __user *uset)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun return compat_sys_rt_sigsuspend(uset, sizeof(compat_sigset_t));
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun SYSCALL_DEFINE3(32_sigaction, long, sig, const struct compat_sigaction __user *, act,
39*4882a593Smuzhiyun struct compat_sigaction __user *, oact)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun struct k_sigaction new_ka, old_ka;
42*4882a593Smuzhiyun int ret;
43*4882a593Smuzhiyun int err = 0;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun if (act) {
46*4882a593Smuzhiyun old_sigset_t mask;
47*4882a593Smuzhiyun s32 handler;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (!access_ok(act, sizeof(*act)))
50*4882a593Smuzhiyun return -EFAULT;
51*4882a593Smuzhiyun err |= __get_user(handler, &act->sa_handler);
52*4882a593Smuzhiyun new_ka.sa.sa_handler = (void __user *)(s64)handler;
53*4882a593Smuzhiyun err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
54*4882a593Smuzhiyun err |= __get_user(mask, &act->sa_mask.sig[0]);
55*4882a593Smuzhiyun if (err)
56*4882a593Smuzhiyun return -EFAULT;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun siginitset(&new_ka.sa.sa_mask, mask);
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun if (!ret && oact) {
64*4882a593Smuzhiyun if (!access_ok(oact, sizeof(*oact)))
65*4882a593Smuzhiyun return -EFAULT;
66*4882a593Smuzhiyun err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
67*4882a593Smuzhiyun err |= __put_user((u32)(u64)old_ka.sa.sa_handler,
68*4882a593Smuzhiyun &oact->sa_handler);
69*4882a593Smuzhiyun err |= __put_user(old_ka.sa.sa_mask.sig[0], oact->sa_mask.sig);
70*4882a593Smuzhiyun err |= __put_user(0, &oact->sa_mask.sig[1]);
71*4882a593Smuzhiyun err |= __put_user(0, &oact->sa_mask.sig[2]);
72*4882a593Smuzhiyun err |= __put_user(0, &oact->sa_mask.sig[3]);
73*4882a593Smuzhiyun if (err)
74*4882a593Smuzhiyun return -EFAULT;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun return ret;
78*4882a593Smuzhiyun }
79