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qemu-e2k/ui/input.c
Don Koch 4282c82770 Don't crash on keyboard input with no handler 
Prevent a call to put_kbd if null.

On shutdown of some OSes, the keyboard handler goes away before the
system is down. If a key is typed during this window, qemu crashes.

Signed-off-by: Don Koch <dkoch@verizon.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-12-02 21:09:04 +04:00

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/*
* QEMU System Emulator
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "sysemu/sysemu.h"
#include "monitor/monitor.h"
#include "ui/console.h"
#include "qapi/error.h"
#include "qmp-commands.h"
#include "qapi-types.h"
#include "ui/keymaps.h"
struct QEMUPutMouseEntry {
QEMUPutMouseEvent *qemu_put_mouse_event;
void *qemu_put_mouse_event_opaque;
int qemu_put_mouse_event_absolute;
char *qemu_put_mouse_event_name;
int index;
/* used internally by qemu for handling mice */
QTAILQ_ENTRY(QEMUPutMouseEntry) node;
};
struct QEMUPutKbdEntry {
QEMUPutKBDEvent *put_kbd;
void *opaque;
QTAILQ_ENTRY(QEMUPutKbdEntry) next;
};
struct QEMUPutLEDEntry {
QEMUPutLEDEvent *put_led;
void *opaque;
QTAILQ_ENTRY(QEMUPutLEDEntry) next;
};
static QTAILQ_HEAD(, QEMUPutLEDEntry) led_handlers =
QTAILQ_HEAD_INITIALIZER(led_handlers);
static QTAILQ_HEAD(, QEMUPutKbdEntry) kbd_handlers =
QTAILQ_HEAD_INITIALIZER(kbd_handlers);
static QTAILQ_HEAD(, QEMUPutMouseEntry) mouse_handlers =
QTAILQ_HEAD_INITIALIZER(mouse_handlers);
static NotifierList mouse_mode_notifiers =
NOTIFIER_LIST_INITIALIZER(mouse_mode_notifiers);
static const int key_defs[] = {
[Q_KEY_CODE_SHIFT] = 0x2a,
[Q_KEY_CODE_SHIFT_R] = 0x36,
[Q_KEY_CODE_ALT] = 0x38,
[Q_KEY_CODE_ALT_R] = 0xb8,
[Q_KEY_CODE_ALTGR] = 0x64,
[Q_KEY_CODE_ALTGR_R] = 0xe4,
[Q_KEY_CODE_CTRL] = 0x1d,
[Q_KEY_CODE_CTRL_R] = 0x9d,
[Q_KEY_CODE_MENU] = 0xdd,
[Q_KEY_CODE_ESC] = 0x01,
[Q_KEY_CODE_1] = 0x02,
[Q_KEY_CODE_2] = 0x03,
[Q_KEY_CODE_3] = 0x04,
[Q_KEY_CODE_4] = 0x05,
[Q_KEY_CODE_5] = 0x06,
[Q_KEY_CODE_6] = 0x07,
[Q_KEY_CODE_7] = 0x08,
[Q_KEY_CODE_8] = 0x09,
[Q_KEY_CODE_9] = 0x0a,
[Q_KEY_CODE_0] = 0x0b,
[Q_KEY_CODE_MINUS] = 0x0c,
[Q_KEY_CODE_EQUAL] = 0x0d,
[Q_KEY_CODE_BACKSPACE] = 0x0e,
[Q_KEY_CODE_TAB] = 0x0f,
[Q_KEY_CODE_Q] = 0x10,
[Q_KEY_CODE_W] = 0x11,
[Q_KEY_CODE_E] = 0x12,
[Q_KEY_CODE_R] = 0x13,
[Q_KEY_CODE_T] = 0x14,
[Q_KEY_CODE_Y] = 0x15,
[Q_KEY_CODE_U] = 0x16,
[Q_KEY_CODE_I] = 0x17,
[Q_KEY_CODE_O] = 0x18,
[Q_KEY_CODE_P] = 0x19,
[Q_KEY_CODE_BRACKET_LEFT] = 0x1a,
[Q_KEY_CODE_BRACKET_RIGHT] = 0x1b,
[Q_KEY_CODE_RET] = 0x1c,
[Q_KEY_CODE_A] = 0x1e,
[Q_KEY_CODE_S] = 0x1f,
[Q_KEY_CODE_D] = 0x20,
[Q_KEY_CODE_F] = 0x21,
[Q_KEY_CODE_G] = 0x22,
[Q_KEY_CODE_H] = 0x23,
[Q_KEY_CODE_J] = 0x24,
[Q_KEY_CODE_K] = 0x25,
[Q_KEY_CODE_L] = 0x26,
[Q_KEY_CODE_SEMICOLON] = 0x27,
[Q_KEY_CODE_APOSTROPHE] = 0x28,
[Q_KEY_CODE_GRAVE_ACCENT] = 0x29,
[Q_KEY_CODE_BACKSLASH] = 0x2b,
[Q_KEY_CODE_Z] = 0x2c,
[Q_KEY_CODE_X] = 0x2d,
[Q_KEY_CODE_C] = 0x2e,
[Q_KEY_CODE_V] = 0x2f,
[Q_KEY_CODE_B] = 0x30,
[Q_KEY_CODE_N] = 0x31,
[Q_KEY_CODE_M] = 0x32,
[Q_KEY_CODE_COMMA] = 0x33,
[Q_KEY_CODE_DOT] = 0x34,
[Q_KEY_CODE_SLASH] = 0x35,
[Q_KEY_CODE_ASTERISK] = 0x37,
[Q_KEY_CODE_SPC] = 0x39,
[Q_KEY_CODE_CAPS_LOCK] = 0x3a,
[Q_KEY_CODE_F1] = 0x3b,
[Q_KEY_CODE_F2] = 0x3c,
[Q_KEY_CODE_F3] = 0x3d,
[Q_KEY_CODE_F4] = 0x3e,
[Q_KEY_CODE_F5] = 0x3f,
[Q_KEY_CODE_F6] = 0x40,
[Q_KEY_CODE_F7] = 0x41,
[Q_KEY_CODE_F8] = 0x42,
[Q_KEY_CODE_F9] = 0x43,
[Q_KEY_CODE_F10] = 0x44,
[Q_KEY_CODE_NUM_LOCK] = 0x45,
[Q_KEY_CODE_SCROLL_LOCK] = 0x46,
[Q_KEY_CODE_KP_DIVIDE] = 0xb5,
[Q_KEY_CODE_KP_MULTIPLY] = 0x37,
[Q_KEY_CODE_KP_SUBTRACT] = 0x4a,
[Q_KEY_CODE_KP_ADD] = 0x4e,
[Q_KEY_CODE_KP_ENTER] = 0x9c,
[Q_KEY_CODE_KP_DECIMAL] = 0x53,
[Q_KEY_CODE_SYSRQ] = 0x54,
[Q_KEY_CODE_KP_0] = 0x52,
[Q_KEY_CODE_KP_1] = 0x4f,
[Q_KEY_CODE_KP_2] = 0x50,
[Q_KEY_CODE_KP_3] = 0x51,
[Q_KEY_CODE_KP_4] = 0x4b,
[Q_KEY_CODE_KP_5] = 0x4c,
[Q_KEY_CODE_KP_6] = 0x4d,
[Q_KEY_CODE_KP_7] = 0x47,
[Q_KEY_CODE_KP_8] = 0x48,
[Q_KEY_CODE_KP_9] = 0x49,
[Q_KEY_CODE_LESS] = 0x56,
[Q_KEY_CODE_F11] = 0x57,
[Q_KEY_CODE_F12] = 0x58,
[Q_KEY_CODE_PRINT] = 0xb7,
[Q_KEY_CODE_HOME] = 0xc7,
[Q_KEY_CODE_PGUP] = 0xc9,
[Q_KEY_CODE_PGDN] = 0xd1,
[Q_KEY_CODE_END] = 0xcf,
[Q_KEY_CODE_LEFT] = 0xcb,
[Q_KEY_CODE_UP] = 0xc8,
[Q_KEY_CODE_DOWN] = 0xd0,
[Q_KEY_CODE_RIGHT] = 0xcd,
[Q_KEY_CODE_INSERT] = 0xd2,
[Q_KEY_CODE_DELETE] = 0xd3,
#ifdef NEED_CPU_H
#if defined(TARGET_SPARC) && !defined(TARGET_SPARC64)
[Q_KEY_CODE_STOP] = 0xf0,
[Q_KEY_CODE_AGAIN] = 0xf1,
[Q_KEY_CODE_PROPS] = 0xf2,
[Q_KEY_CODE_UNDO] = 0xf3,
[Q_KEY_CODE_FRONT] = 0xf4,
[Q_KEY_CODE_COPY] = 0xf5,
[Q_KEY_CODE_OPEN] = 0xf6,
[Q_KEY_CODE_PASTE] = 0xf7,
[Q_KEY_CODE_FIND] = 0xf8,
[Q_KEY_CODE_CUT] = 0xf9,
[Q_KEY_CODE_LF] = 0xfa,
[Q_KEY_CODE_HELP] = 0xfb,
[Q_KEY_CODE_META_L] = 0xfc,
[Q_KEY_CODE_META_R] = 0xfd,
[Q_KEY_CODE_COMPOSE] = 0xfe,
#endif
#endif
[Q_KEY_CODE_MAX] = 0,
};
int index_from_key(const char *key)
{
int i;
for (i = 0; QKeyCode_lookup[i] != NULL; i++) {
if (!strcmp(key, QKeyCode_lookup[i])) {
break;
}
}
/* Return Q_KEY_CODE_MAX if the key is invalid */
return i;
}
int index_from_keycode(int code)
{
int i;
for (i = 0; i < Q_KEY_CODE_MAX; i++) {
if (key_defs[i] == code) {
break;
}
}
/* Return Q_KEY_CODE_MAX if the code is invalid */
return i;
}
static int *keycodes;
static int keycodes_size;
static QEMUTimer *key_timer;
static int keycode_from_keyvalue(const KeyValue *value)
{
if (value->kind == KEY_VALUE_KIND_QCODE) {
return key_defs[value->qcode];
} else {
assert(value->kind == KEY_VALUE_KIND_NUMBER);
return value->number;
}
}
static void free_keycodes(void)
{
g_free(keycodes);
keycodes = NULL;
keycodes_size = 0;
}
static void release_keys(void *opaque)
{
while (keycodes_size > 0) {
if (keycodes[--keycodes_size] & SCANCODE_GREY) {
kbd_put_keycode(SCANCODE_EMUL0);
}
kbd_put_keycode(keycodes[keycodes_size] | SCANCODE_UP);
}
free_keycodes();
}
void qmp_send_key(KeyValueList *keys, bool has_hold_time, int64_t hold_time,
Error **errp)
{
int keycode;
KeyValueList *p;
if (!key_timer) {
key_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, release_keys, NULL);
}
if (keycodes != NULL) {
timer_del(key_timer);
release_keys(NULL);
}
if (!has_hold_time) {
hold_time = 100;
}
for (p = keys; p != NULL; p = p->next) {
/* key down events */
keycode = keycode_from_keyvalue(p->value);
if (keycode < 0x01 || keycode > 0xff) {
error_setg(errp, "invalid hex keycode 0x%x", keycode);
free_keycodes();
return;
}
if (keycode & SCANCODE_GREY) {
kbd_put_keycode(SCANCODE_EMUL0);
}
kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK);
keycodes = g_realloc(keycodes, sizeof(int) * (keycodes_size + 1));
keycodes[keycodes_size++] = keycode;
}
/* delayed key up events */
timer_mod(key_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
muldiv64(get_ticks_per_sec(), hold_time, 1000));
}
QEMUPutKbdEntry *qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void *opaque)
{
QEMUPutKbdEntry *entry;
entry = g_malloc0(sizeof(QEMUPutKbdEntry));
entry->put_kbd = func;
entry->opaque = opaque;
QTAILQ_INSERT_HEAD(&kbd_handlers, entry, next);
return entry;
}
void qemu_remove_kbd_event_handler(QEMUPutKbdEntry *entry)
{
QTAILQ_REMOVE(&kbd_handlers, entry, next);
}
static void check_mode_change(void)
{
static int current_is_absolute, current_has_absolute;
int is_absolute;
int has_absolute;
is_absolute = kbd_mouse_is_absolute();
has_absolute = kbd_mouse_has_absolute();
if (is_absolute != current_is_absolute ||
has_absolute != current_has_absolute) {
notifier_list_notify(&mouse_mode_notifiers, NULL);
}
current_is_absolute = is_absolute;
current_has_absolute = has_absolute;
}
QEMUPutMouseEntry *qemu_add_mouse_event_handler(QEMUPutMouseEvent *func,
void *opaque, int absolute,
const char *name)
{
QEMUPutMouseEntry *s;
static int mouse_index = 0;
s = g_malloc0(sizeof(QEMUPutMouseEntry));
s->qemu_put_mouse_event = func;
s->qemu_put_mouse_event_opaque = opaque;
s->qemu_put_mouse_event_absolute = absolute;
s->qemu_put_mouse_event_name = g_strdup(name);
s->index = mouse_index++;
QTAILQ_INSERT_TAIL(&mouse_handlers, s, node);
check_mode_change();
return s;
}
void qemu_activate_mouse_event_handler(QEMUPutMouseEntry *entry)
{
QTAILQ_REMOVE(&mouse_handlers, entry, node);
QTAILQ_INSERT_HEAD(&mouse_handlers, entry, node);
check_mode_change();
}
void qemu_remove_mouse_event_handler(QEMUPutMouseEntry *entry)
{
QTAILQ_REMOVE(&mouse_handlers, entry, node);
g_free(entry->qemu_put_mouse_event_name);
g_free(entry);
check_mode_change();
}
QEMUPutLEDEntry *qemu_add_led_event_handler(QEMUPutLEDEvent *func,
void *opaque)
{
QEMUPutLEDEntry *s;
s = g_malloc0(sizeof(QEMUPutLEDEntry));
s->put_led = func;
s->opaque = opaque;
QTAILQ_INSERT_TAIL(&led_handlers, s, next);
return s;
}
void qemu_remove_led_event_handler(QEMUPutLEDEntry *entry)
{
if (entry == NULL)
return;
QTAILQ_REMOVE(&led_handlers, entry, next);
g_free(entry);
}
void kbd_put_keycode(int keycode)
{
QEMUPutKbdEntry *entry = QTAILQ_FIRST(&kbd_handlers);
if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
return;
}
if (entry && entry->put_kbd) {
entry->put_kbd(entry->opaque, keycode);
}
}
void kbd_put_ledstate(int ledstate)
{
QEMUPutLEDEntry *cursor;
QTAILQ_FOREACH(cursor, &led_handlers, next) {
cursor->put_led(cursor->opaque, ledstate);
}
}
void kbd_mouse_event(int dx, int dy, int dz, int buttons_state)
{
QEMUPutMouseEntry *entry;
QEMUPutMouseEvent *mouse_event;
void *mouse_event_opaque;
int width, height;
if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
return;
}
if (QTAILQ_EMPTY(&mouse_handlers)) {
return;
}
entry = QTAILQ_FIRST(&mouse_handlers);
mouse_event = entry->qemu_put_mouse_event;
mouse_event_opaque = entry->qemu_put_mouse_event_opaque;
if (mouse_event) {
if (entry->qemu_put_mouse_event_absolute) {
width = 0x7fff;
height = 0x7fff;
} else {
width = graphic_width - 1;
height = graphic_height - 1;
}
switch (graphic_rotate) {
case 0:
mouse_event(mouse_event_opaque,
dx, dy, dz, buttons_state);
break;
case 90:
mouse_event(mouse_event_opaque,
width - dy, dx, dz, buttons_state);
break;
case 180:
mouse_event(mouse_event_opaque,
width - dx, height - dy, dz, buttons_state);
break;
case 270:
mouse_event(mouse_event_opaque,
dy, height - dx, dz, buttons_state);
break;
}
}
}
int kbd_mouse_is_absolute(void)
{
if (QTAILQ_EMPTY(&mouse_handlers)) {
return 0;
}
return QTAILQ_FIRST(&mouse_handlers)->qemu_put_mouse_event_absolute;
}
int kbd_mouse_has_absolute(void)
{
QEMUPutMouseEntry *entry;
QTAILQ_FOREACH(entry, &mouse_handlers, node) {
if (entry->qemu_put_mouse_event_absolute) {
return 1;
}
}
return 0;
}
MouseInfoList *qmp_query_mice(Error **errp)
{
MouseInfoList *mice_list = NULL;
QEMUPutMouseEntry *cursor;
bool current = true;
QTAILQ_FOREACH(cursor, &mouse_handlers, node) {
MouseInfoList *info = g_malloc0(sizeof(*info));
info->value = g_malloc0(sizeof(*info->value));
info->value->name = g_strdup(cursor->qemu_put_mouse_event_name);
info->value->index = cursor->index;
info->value->absolute = !!cursor->qemu_put_mouse_event_absolute;
info->value->current = current;
current = false;
info->next = mice_list;
mice_list = info;
}
return mice_list;
}
void do_mouse_set(Monitor *mon, const QDict *qdict)
{
QEMUPutMouseEntry *cursor;
int index = qdict_get_int(qdict, "index");
int found = 0;
if (QTAILQ_EMPTY(&mouse_handlers)) {
monitor_printf(mon, "No mouse devices connected\n");
return;
}
QTAILQ_FOREACH(cursor, &mouse_handlers, node) {
if (cursor->index == index) {
found = 1;
qemu_activate_mouse_event_handler(cursor);
break;
}
}
if (!found) {
monitor_printf(mon, "Mouse at given index not found\n");
}
check_mode_change();
}
void qemu_add_mouse_mode_change_notifier(Notifier *notify)
{
notifier_list_add(&mouse_mode_notifiers, notify);
}
void qemu_remove_mouse_mode_change_notifier(Notifier *notify)
{
notifier_remove(notify);
}
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