cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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termios-base.h (2164B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/* termios.h: generic termios/termio user copying/translation
      3 */
      4
      5#ifndef _ASM_GENERIC_TERMIOS_BASE_H
      6#define _ASM_GENERIC_TERMIOS_BASE_H
      7
      8#include <linux/uaccess.h>
      9
     10#ifndef __ARCH_TERMIO_GETPUT
     11
     12/*
     13 * Translate a "termio" structure into a "termios". Ugh.
     14 */
     15static inline int user_termio_to_kernel_termios(struct ktermios *termios,
     16						struct termio __user *termio)
     17{
     18	unsigned short tmp;
     19
     20	if (get_user(tmp, &termio->c_iflag) < 0)
     21		goto fault;
     22	termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
     23
     24	if (get_user(tmp, &termio->c_oflag) < 0)
     25		goto fault;
     26	termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
     27
     28	if (get_user(tmp, &termio->c_cflag) < 0)
     29		goto fault;
     30	termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
     31
     32	if (get_user(tmp, &termio->c_lflag) < 0)
     33		goto fault;
     34	termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
     35
     36	if (get_user(termios->c_line, &termio->c_line) < 0)
     37		goto fault;
     38
     39	if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
     40		goto fault;
     41
     42	return 0;
     43
     44 fault:
     45	return -EFAULT;
     46}
     47
     48/*
     49 * Translate a "termios" structure into a "termio". Ugh.
     50 */
     51static inline int kernel_termios_to_user_termio(struct termio __user *termio,
     52						struct ktermios *termios)
     53{
     54	if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
     55	    put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
     56	    put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
     57	    put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
     58	    put_user(termios->c_line,  &termio->c_line) < 0 ||
     59	    copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
     60		return -EFAULT;
     61
     62	return 0;
     63}
     64
     65#ifndef user_termios_to_kernel_termios
     66#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
     67#endif
     68
     69#ifndef kernel_termios_to_user_termios
     70#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
     71#endif
     72
     73#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
     74#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
     75
     76#endif	/* __ARCH_TERMIO_GETPUT */
     77
     78#endif /* _ASM_GENERIC_TERMIOS_BASE_H */