openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ARM: 7494/1: use generic termios.h 

As pointed out by Arnd Bergmann, this fixes a couple of issues but will
increase code size:

The original macro user_termio_to_kernel_termios was not endian safe. It
used an unsigned short ptr to access the low bits in a 32-bit word.

Both user_termio_to_kernel_termios and kernel_termios_to_user_termio are
missing error checking on put_user/get_user and copy_to/from_user.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Rob Herring 2012-08-15 16:28:38 +01:00 committed by Russell King
parent d25c881aa3
commit e780c452cf
2 changed files with 1 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/include/asm/Kbuild
View File

@ -31,6 +31,7 @@ generic-y += sizes.h
generic-y += socket.h
generic-y += sockios.h
generic-y += termbits.h
generic-y += termios.h
generic-y += timex.h
generic-y += types.h
generic-y += unaligned.h

92
arch/arm/include/asm/termios.h
View File

@ -1,92 +0,0 @@
#ifndef __ASM_ARM_TERMIOS_H
#define __ASM_ARM_TERMIOS_H
#include <asm/termbits.h>
#include <asm/ioctls.h>
struct winsize {
unsigned short ws_row;
unsigned short ws_col;
unsigned short ws_xpixel;
unsigned short ws_ypixel;
};
#define NCC 8
struct termio {
unsigned short c_iflag; /* input mode flags */
unsigned short c_oflag; /* output mode flags */
unsigned short c_cflag; /* control mode flags */
unsigned short c_lflag; /* local mode flags */
unsigned char c_line; /* line discipline */
unsigned char c_cc[NCC]; /* control characters */
};
#ifdef __KERNEL__
/* intr=^C quit=^| erase=del kill=^U
eof=^D vtime=\0 vmin=\1 sxtc=\0
start=^Q stop=^S susp=^Z eol=\0
reprint=^R discard=^U werase=^W lnext=^V
eol2=\0
*/
#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
#endif
/* modem lines */
#define TIOCM_LE 0x001
#define TIOCM_DTR 0x002
#define TIOCM_RTS 0x004
#define TIOCM_ST 0x008
#define TIOCM_SR 0x010
#define TIOCM_CTS 0x020
#define TIOCM_CAR 0x040
#define TIOCM_RNG 0x080
#define TIOCM_DSR 0x100
#define TIOCM_CD TIOCM_CAR
#define TIOCM_RI TIOCM_RNG
#define TIOCM_OUT1 0x2000
#define TIOCM_OUT2 0x4000
#define TIOCM_LOOP 0x8000
/* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
#ifdef __KERNEL__
/*
* Translate a "termio" structure into a "termios". Ugh.
*/
#define SET_LOW_TERMIOS_BITS(termios, termio, x) { \
unsigned short __tmp; \
get_user(__tmp,&(termio)->x); \
*(unsigned short *) &(termios)->x = __tmp; \
}
#define user_termio_to_kernel_termios(termios, termio) \
({ \
SET_LOW_TERMIOS_BITS(termios, termio, c_iflag); \
SET_LOW_TERMIOS_BITS(termios, termio, c_oflag); \
SET_LOW_TERMIOS_BITS(termios, termio, c_cflag); \
SET_LOW_TERMIOS_BITS(termios, termio, c_lflag); \
copy_from_user((termios)->c_cc, (termio)->c_cc, NCC); \
})
/*
* Translate a "termios" structure into a "termio". Ugh.
*/
#define kernel_termios_to_user_termio(termio, termios) \
({ \
put_user((termios)->c_iflag, &(termio)->c_iflag); \
put_user((termios)->c_oflag, &(termio)->c_oflag); \
put_user((termios)->c_cflag, &(termio)->c_cflag); \
put_user((termios)->c_lflag, &(termio)->c_lflag); \
put_user((termios)->c_line, &(termio)->c_line); \
copy_to_user((termio)->c_cc, (termios)->c_cc, NCC); \
})
#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios2))
#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios2))
#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
#endif /* __KERNEL__ */
#endif /* __ASM_ARM_TERMIOS_H */