diff options
Diffstat (limited to 'arch/um/include')
| -rw-r--r-- | arch/um/include/chan_user.h | 4 | ||||
| -rw-r--r-- | arch/um/include/um_uaccess.h | 19 |
2 files changed, 20 insertions, 3 deletions
diff --git a/arch/um/include/chan_user.h b/arch/um/include/chan_user.h index f77d9aa4c164..659bb3cac32f 100644 --- a/arch/um/include/chan_user.h +++ b/arch/um/include/chan_user.h @@ -25,7 +25,7 @@ struct chan_ops { void (*close)(int, void *); int (*read)(int, char *, void *); int (*write)(int, const char *, int, void *); - int (*console_write)(int, const char *, int, void *); + int (*console_write)(int, const char *, int); int (*window_size)(int, void *, unsigned short *, unsigned short *); void (*free)(void *); int winch; @@ -37,7 +37,7 @@ extern struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops, tty_ops, extern void generic_close(int fd, void *unused); extern int generic_read(int fd, char *c_out, void *unused); extern int generic_write(int fd, const char *buf, int n, void *unused); -extern int generic_console_write(int fd, const char *buf, int n, void *state); +extern int generic_console_write(int fd, const char *buf, int n); extern int generic_window_size(int fd, void *unused, unsigned short *rows_out, unsigned short *cols_out); extern void generic_free(void *data); diff --git a/arch/um/include/um_uaccess.h b/arch/um/include/um_uaccess.h index 84c0868cd561..f8760a3f43b0 100644 --- a/arch/um/include/um_uaccess.h +++ b/arch/um/include/um_uaccess.h @@ -17,8 +17,25 @@ #include "uaccess-skas.h" #endif +#define __under_task_size(addr, size) \ + (((unsigned long) (addr) < TASK_SIZE) && \ + (((unsigned long) (addr) + (size)) < TASK_SIZE)) + +#define __access_ok_vsyscall(type, addr, size) \ + ((type == VERIFY_READ) && \ + ((unsigned long) (addr) >= FIXADDR_USER_START) && \ + ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \ + ((unsigned long) (addr) + (size) >= (unsigned long)(addr))) + +#define __addr_range_nowrap(addr, size) \ + ((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) + #define access_ok(type, addr, size) \ - CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size) + (__addr_range_nowrap(addr, size) && \ + (__under_task_size(addr, size) || \ + __access_ok_vsyscall(type, addr, size) || \ + segment_eq(get_fs(), KERNEL_DS) || \ + CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size))) static inline int copy_from_user(void *to, const void __user *from, int n) { |
