diff options
Diffstat (limited to 'kernel/debug/kdb/kdb_keyboard.c')
| -rw-r--r-- | kernel/debug/kdb/kdb_keyboard.c | 36 |
1 files changed, 26 insertions, 10 deletions
diff --git a/kernel/debug/kdb/kdb_keyboard.c b/kernel/debug/kdb/kdb_keyboard.c index f877a0a0d7cf..3a74604fdb8a 100644 --- a/kernel/debug/kdb/kdb_keyboard.c +++ b/kernel/debug/kdb/kdb_keyboard.c @@ -11,9 +11,10 @@ #include <linux/kdb.h> #include <linux/keyboard.h> #include <linux/ctype.h> -#include <linux/module.h> #include <linux/io.h> +#include "kdb_private.h" + /* Keyboard Controller Registers on normal PCs. */ #define KBD_STATUS_REG 0x64 /* Status register (R) */ @@ -24,6 +25,8 @@ #define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */ #define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */ +#define CTRL(c) ((c) - 64) + static int kbd_exists; static int kbd_last_ret; @@ -122,24 +125,24 @@ int kdb_get_kbd_char(void) return 8; } - /* Special Key */ + /* Translate special keys to equivalent CTRL control characters */ switch (scancode) { case 0xF: /* Tab */ - return 9; + return CTRL('I'); case 0x53: /* Del */ - return 4; + return CTRL('D'); case 0x47: /* Home */ - return 1; + return CTRL('A'); case 0x4F: /* End */ - return 5; + return CTRL('E'); case 0x4B: /* Left */ - return 2; + return CTRL('B'); case 0x48: /* Up */ - return 16; + return CTRL('P'); case 0x50: /* Down */ - return 14; + return CTRL('N'); case 0x4D: /* Right */ - return 6; + return CTRL('F'); } if (scancode == 0xe0) @@ -171,6 +174,19 @@ int kdb_get_kbd_char(void) switch (KTYP(keychar)) { case KT_LETTER: case KT_LATIN: + switch (keychar) { + /* non-printable supported control characters */ + case CTRL('A'): /* Home */ + case CTRL('B'): /* Left */ + case CTRL('D'): /* Del */ + case CTRL('E'): /* End */ + case CTRL('F'): /* Right */ + case CTRL('I'): /* Tab */ + case CTRL('N'): /* Down */ + case CTRL('P'): /* Up */ + return keychar; + } + if (isprint(keychar)) break; /* printable characters */ fallthrough; |