Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * License.  See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (C) 1991, 1992  Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (C) 1994 - 2000, 2006  Ralf Baechle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Copyright (C) 2016, Imagination Technologies Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/compat-signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "signal-common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /* 32-bit compatibility types */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) typedef unsigned int __sighandler32_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) typedef void (*vfptr_t)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)  * Atomically swap in the new signal mask, and wait for a signal.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) asmlinkage int sys32_sigsuspend(compat_sigset_t __user *uset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	return compat_sys_rt_sigsuspend(uset, sizeof(compat_sigset_t));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) SYSCALL_DEFINE3(32_sigaction, long, sig, const struct compat_sigaction __user *, act,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	struct compat_sigaction __user *, oact)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	struct k_sigaction new_ka, old_ka;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	if (act) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		old_sigset_t mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		s32 handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		if (!access_ok(act, sizeof(*act)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		err |= __get_user(handler, &act->sa_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		new_ka.sa.sa_handler = (void __user *)(s64)handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		err |= __get_user(mask, &act->sa_mask.sig[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		siginitset(&new_ka.sa.sa_mask, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	if (!ret && oact) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		if (!access_ok(oact, sizeof(*oact)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 		err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 		err |= __put_user((u32)(u64)old_ka.sa.sa_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 				  &oact->sa_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 		err |= __put_user(old_ka.sa.sa_mask.sig[0], oact->sa_mask.sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 		err |= __put_user(0, &oact->sa_mask.sig[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 		err |= __put_user(0, &oact->sa_mask.sig[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		err |= __put_user(0, &oact->sa_mask.sig[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }