diff options
Diffstat (limited to 'arch/alpha/kernel')
| -rw-r--r-- | arch/alpha/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/alpha/kernel/termios.c | 57 |
2 files changed, 58 insertions, 1 deletions
diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile index 5a74581bf0ee..61e3b42b8322 100644 --- a/arch/alpha/kernel/Makefile +++ b/arch/alpha/kernel/Makefile @@ -9,7 +9,7 @@ ccflags-y := -Wno-sign-compare obj-y := entry.o traps.o process.o osf_sys.o irq.o \ irq_alpha.o signal.o setup.o ptrace.o time.o \ - systbls.o err_common.o io.o bugs.o + systbls.o err_common.o io.o bugs.o termios.o obj-$(CONFIG_VGA_HOSE) += console.o obj-$(CONFIG_SMP) += smp.o diff --git a/arch/alpha/kernel/termios.c b/arch/alpha/kernel/termios.c new file mode 100644 index 000000000000..1534f39cb9fe --- /dev/null +++ b/arch/alpha/kernel/termios.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/uaccess.h> +#include <linux/termios.h> + +int user_termio_to_kernel_termios(struct ktermios *termios, + struct termio __user *termio) +{ + struct termio v; + bool canon; + + if (copy_from_user(&v, termio, sizeof(struct termio))) + return -EFAULT; + + termios->c_iflag = (0xffff0000 & termios->c_iflag) | v.c_iflag; + termios->c_oflag = (0xffff0000 & termios->c_oflag) | v.c_oflag; + termios->c_cflag = (0xffff0000 & termios->c_cflag) | v.c_cflag; + termios->c_lflag = (0xffff0000 & termios->c_lflag) | v.c_lflag; + termios->c_line = (0xffff0000 & termios->c_lflag) | v.c_line; + + canon = v.c_lflag & ICANON; + termios->c_cc[VINTR] = v.c_cc[_VINTR]; + termios->c_cc[VQUIT] = v.c_cc[_VQUIT]; + termios->c_cc[VERASE] = v.c_cc[_VERASE]; + termios->c_cc[VKILL] = v.c_cc[_VKILL]; + termios->c_cc[VEOL2] = v.c_cc[_VEOL2]; + termios->c_cc[VSWTC] = v.c_cc[_VSWTC]; + termios->c_cc[canon ? VEOF : VMIN] = v.c_cc[_VEOF]; + termios->c_cc[canon ? VEOL : VTIME] = v.c_cc[_VEOL]; + + return 0; +} + +int kernel_termios_to_user_termio(struct termio __user *termio, + struct ktermios *termios) +{ + struct termio v; + bool canon; + + memset(&v, 0, sizeof(struct termio)); + v.c_iflag = termios->c_iflag; + v.c_oflag = termios->c_oflag; + v.c_cflag = termios->c_cflag; + v.c_lflag = termios->c_lflag; + v.c_line = termios->c_line; + + canon = v.c_lflag & ICANON; + v.c_cc[_VINTR] = termios->c_cc[VINTR]; + v.c_cc[_VQUIT] = termios->c_cc[VQUIT]; + v.c_cc[_VERASE] = termios->c_cc[VERASE]; + v.c_cc[_VKILL] = termios->c_cc[VKILL]; + v.c_cc[_VEOF] = termios->c_cc[canon ? VEOF : VMIN]; + v.c_cc[_VEOL] = termios->c_cc[canon ? VEOL : VTIME]; + v.c_cc[_VEOL2] = termios->c_cc[VEOL2]; + v.c_cc[_VSWTC] = termios->c_cc[VSWTC]; + + return copy_to_user(termio, &v, sizeof(struct termio)); +} |