* Added an emergency key mechanism to the kernel, inspired by Jan Klötzke's
patch from about a year ago (I couldn't use any code of his yet, though, but there are a few things left). The emergency keys are triggered by pressing Alt-SysReq + key. * By default, only Alt-SysReq+'d' is used as a means to deliberately enter the kernel debugger. F12 belongs to userland again, now :-) * Debugger add-ons now have another optional method to implement their own emergency keys - 'd' for the debugger cannot be overridden, though. * The mechanism can be turned off via a new kernel setting, so it's not that easy anymore to "crash" Haiku if you don't want to. * Right now, the PS/2 driver, and the pre-input_server in-kernel debugger keyboard mini-driver support this, USB not yet. * Minor cleanup. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31660 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
parent
8ef9253a59
commit
c755ecfe96
@ -50,5 +50,8 @@
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# (system shutdown, battery info, ...)
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# default is off
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#emergency_keys false
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# Disables emergency keys (ie. Alt-SysReq+*), enabled by default
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#acpi true
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# ACPI support, off by default
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@ -28,7 +28,11 @@
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#endif
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#define ASSERT_ALWAYS(x) \
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do { if (!(x)) { panic("ASSERT FAILED (%s:%d): %s\n", __FILE__, __LINE__, #x); } } while (0)
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do { \
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if (!(x)) { \
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panic("ASSERT FAILED (%s:%d): %s\n", __FILE__, __LINE__, #x); \
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} \
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} while (0)
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#define ASSERT_ALWAYS_PRINT(x, format...) \
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do { \
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@ -66,10 +70,13 @@ struct debugger_module_info {
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void (*enter_debugger)(void);
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void (*exit_debugger)(void);
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// io hooks
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// I/O hooks
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int (*debugger_puts)(const char *str, int32 length);
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int (*debugger_getchar)(void);
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// TODO: add hooks for tunnelling gdb ?
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// Misc. hooks
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bool (*emergency_key_pressed)(char key);
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};
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struct debugger_demangle_module_info {
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@ -114,6 +121,7 @@ extern void debug_set_page_fault_info(addr_t faultAddress, addr_t pc,
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uint32 flags);
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extern debug_page_fault_info* debug_get_page_fault_info();
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extern void debug_trap_cpu_in_kdl(bool returnIfHandedOver);
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extern bool debug_emergency_key_pressed(char key);
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extern char kgetc(void);
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extern void kputs(const char *string);
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@ -1,5 +1,5 @@
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/*
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* Copyright 2004-2007 Haiku, Inc.
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* Copyright 2004-2009 Haiku, Inc.
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* Distributed under the terms of the MIT License.
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*
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* Authors (in chronological order):
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@ -10,6 +10,7 @@
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/*! PS/2 bus manager */
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#include <string.h>
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#include "ps2_common.h"
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@ -277,32 +278,33 @@ ps2_interrupt(void* cookie)
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return B_UNHANDLED_INTERRUPT;
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if (atomic_get(&sIgnoreInterrupts)) {
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TRACE("ps2: ps2_interrupt ignoring, ctrl 0x%02x (%s)\n", ctrl, (ctrl & PS2_STATUS_AUX_DATA) ? "aux" : "keyb");
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TRACE("ps2: ps2_interrupt ignoring, ctrl 0x%02x (%s)\n", ctrl,
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(ctrl & PS2_STATUS_AUX_DATA) ? "aux" : "keyb");
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return B_HANDLED_INTERRUPT;
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}
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data = ps2_read_data();
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if (ctrl & PS2_STATUS_AUX_DATA) {
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if ((ctrl & PS2_STATUS_AUX_DATA) != 0) {
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uint8 idx;
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if (gActiveMultiplexingEnabled) {
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idx = ctrl >> 6;
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error = (ctrl & 0x04) != 0;
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TRACE("ps2: ps2_interrupt ctrl 0x%02x, data 0x%02x (mouse %d)\n", ctrl, data, idx);
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TRACE("ps2: ps2_interrupt ctrl 0x%02x, data 0x%02x (mouse %d)\n",
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ctrl, data, idx);
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} else {
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idx = 0;
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error = (ctrl & 0xC0) != 0;
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TRACE("ps2: ps2_interrupt ctrl 0x%02x, data 0x%02x (aux)\n", ctrl, data);
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TRACE("ps2: ps2_interrupt ctrl 0x%02x, data 0x%02x (aux)\n", ctrl,
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data);
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}
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dev = &ps2_device[PS2_DEVICE_MOUSE + idx];
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} else {
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TRACE("ps2: ps2_interrupt ctrl 0x%02x, data 0x%02x (keyb)\n", ctrl, data);
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TRACE("ps2: ps2_interrupt ctrl 0x%02x, data 0x%02x (keyb)\n", ctrl,
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data);
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dev = &ps2_device[PS2_DEVICE_KEYB];
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error = (ctrl & 0xC0) != 0;
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// TODO: remove me again; let us drop into the kernel debugger with F12
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if (data == 88)
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panic("keyboard requested halt.\n");
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}
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dev->history[1] = dev->history[0];
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@ -1,5 +1,5 @@
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/*
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* Copyright 2004-2007 Haiku, Inc.
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* Copyright 2004-2009 Haiku, Inc.
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* Distributed under the terms of the MIT License.
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*
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* Authors (in chronological order):
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@ -10,11 +10,16 @@
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/*! PS/2 keyboard device driver */
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#include <string.h>
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#include <debug.h>
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#include <debugger_keymaps.h>
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#include "ps2_service.h"
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#include "kb_mouse_driver.h"
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#include "packet_buffer.h"
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#include <string.h>
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#define KEY_BUFFER_SIZE 100
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// we will buffer 100 key strokes before we start dropping them
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@ -27,6 +32,10 @@ enum {
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enum {
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EXTENDED_KEY = 0xe0,
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LEFT_ALT_KEY = 0x38,
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RIGHT_ALT_KEY = 0xb8,
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SYS_REQ_KEY = 0x54
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};
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@ -38,6 +47,7 @@ static bool sIsExtended = false;
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static int32 sKeyboardRepeatRate;
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static bigtime_t sKeyboardRepeatDelay;
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static status_t
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set_leds(led_info *ledInfo)
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{
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@ -52,7 +62,8 @@ set_leds(led_info *ledInfo)
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if (ledInfo->caps_lock)
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leds |= LED_CAPS;
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return ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB], PS2_CMD_KEYBOARD_SET_LEDS, &leds, 1, NULL, 0);
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return ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB],
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PS2_CMD_KEYBOARD_SET_LEDS, &leds, 1, NULL, 0);
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}
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@ -84,13 +95,20 @@ set_typematic(int32 rate, bigtime_t delay)
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else
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value |= 0 << 5;
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return ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB], PS2_CMD_KEYBOARD_SET_TYPEMATIC, &value, 1, NULL, 0);
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return ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB],
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PS2_CMD_KEYBOARD_SET_TYPEMATIC, &value, 1, NULL, 0);
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}
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static int32
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keyboard_handle_int(ps2_dev *dev)
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{
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enum emergency_keys {
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EMERGENCY_LEFT_ALT = 0x01,
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EMERGENCY_RIGHT_ALT = 0x02,
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EMERGENCY_SYS_REQ = 0x04,
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};
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static int emergencyKeyStatus = 0;
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at_kbd_io keyInfo;
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uint8 scancode = dev->history[0].data;
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@ -107,7 +125,7 @@ keyboard_handle_int(ps2_dev *dev)
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// TRACE("scancode: %x\n", scancode);
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if (scancode & 0x80) {
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if ((scancode & 0x80) != 0) {
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keyInfo.is_keydown = false;
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scancode &= 0x7f;
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} else
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@ -118,12 +136,33 @@ keyboard_handle_int(ps2_dev *dev)
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sIsExtended = false;
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}
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// Handle emergency keys
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if (scancode == LEFT_ALT_KEY || scancode == RIGHT_ALT_KEY) {
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// left or right alt-key pressed
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if (keyInfo.is_keydown) {
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emergencyKeyStatus |= scancode == LEFT_ALT_KEY
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? EMERGENCY_LEFT_ALT : EMERGENCY_RIGHT_ALT;
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} else {
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emergencyKeyStatus &= ~(scancode == LEFT_ALT_KEY
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? EMERGENCY_LEFT_ALT : EMERGENCY_RIGHT_ALT);
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}
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} else if (scancode == SYS_REQ_KEY) {
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if (keyInfo.is_keydown)
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emergencyKeyStatus |= EMERGENCY_SYS_REQ;
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else
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emergencyKeyStatus &= EMERGENCY_SYS_REQ;
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} else if (emergencyKeyStatus > EMERGENCY_SYS_REQ
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&& debug_emergency_key_pressed(kUnshiftedKeymap[scancode]))
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return B_HANDLED_INTERRUPT;
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keyInfo.timestamp = dev->history[0].time;
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keyInfo.scancode = scancode;
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if (packet_buffer_write(sKeyBuffer, (uint8 *)&keyInfo, sizeof(keyInfo)) == 0) {
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// If there is no space left in the buffer, we drop this key stroke. We avoid
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// dropping old key strokes, to not destroy what already was typed.
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if (packet_buffer_write(sKeyBuffer, (uint8 *)&keyInfo,
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sizeof(keyInfo)) == 0) {
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// If there is no space left in the buffer, we drop this key stroke. We
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// avoid dropping old key strokes, to not destroy what already was
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// typed.
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return B_HANDLED_INTERRUPT;
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}
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@ -150,11 +189,14 @@ read_keyboard_packet(at_kbd_io *packet)
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}
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if (packet_buffer_read(sKeyBuffer, (uint8 *)packet, sizeof(*packet)) == 0) {
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TRACE("ps2: read_keyboard_packet, Error reading packet: %s\n", strerror(status));
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TRACE("ps2: read_keyboard_packet, Error reading packet: %s\n",
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strerror(status));
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return B_ERROR;
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}
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TRACE("ps2: read_keyboard_packet: scancode: %x, keydown: %s\n", packet->scancode, packet->is_keydown ? "true" : "false");
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TRACE("ps2: read_keyboard_packet: scancode: %x, keydown: %s\n",
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packet->scancode, packet->is_keydown ? "true" : "false");
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return B_OK;
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}
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@ -184,13 +226,16 @@ probe_keyboard(void)
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// return B_ERROR;
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// }
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status = ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB], PS2_CMD_RESET, NULL, 0, &data, 1);
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status = ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB], PS2_CMD_RESET, NULL,
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0, &data, 1);
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if (status != B_OK || data != 0xaa) {
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INFO("ps2: keyboard reset failed, status 0x%08lx, data 0x%02x\n", status, data);
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INFO("ps2: keyboard reset failed, status 0x%08lx, data 0x%02x\n",
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status, data);
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return B_ERROR;
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}
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// default settings after keyboard reset: delay = 0x01 (500 ms), rate = 0x0b (10.9 chr/sec)
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// default settings after keyboard reset: delay = 0x01 (500 ms),
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// rate = 0x0b (10.9 chr/sec)
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sKeyboardRepeatRate = ((31 - 0x0b) * 280) / 31 + 20;
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sKeyboardRepeatDelay = 500000;
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@ -328,24 +373,29 @@ keyboard_ioctl(void *cookie, uint32 op, void *buffer, size_t length)
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case KB_SET_KEY_REPEATING:
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{
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TRACE("ps2: ioctl KB_SET_KEY_REPEATING\n");
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// 0xFA (Set All Keys Typematic/Make/Break) - Keyboard responds with "ack" (0xFA).
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return ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB], 0xfa, NULL, 0, NULL, 0);
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// 0xFA (Set All Keys Typematic/Make/Break) - Keyboard responds
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// with "ack" (0xFA).
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return ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB], 0xfa, NULL, 0,
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NULL, 0);
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}
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case KB_SET_KEY_NONREPEATING:
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{
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TRACE("ps2: ioctl KB_SET_KEY_NONREPEATING\n");
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// 0xF8 (Set All Keys Make/Break) - Keyboard responds with "ack" (0xFA).
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return ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB], 0xf8, NULL, 0, NULL, 0);
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// 0xF8 (Set All Keys Make/Break) - Keyboard responds with "ack"
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// (0xFA).
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return ps2_dev_command(&ps2_device[PS2_DEVICE_KEYB], 0xf8, NULL, 0,
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NULL, 0);
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}
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case KB_SET_KEY_REPEAT_RATE:
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{
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int32 key_repeat_rate;
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TRACE("ps2: ioctl KB_SET_KEY_REPEAT_RATE\n");
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if (user_memcpy(&key_repeat_rate, buffer, sizeof(key_repeat_rate)) < B_OK)
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if (user_memcpy(&key_repeat_rate, buffer, sizeof(key_repeat_rate))
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!= B_OK)
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return B_BAD_ADDRESS;
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if (set_typematic(key_repeat_rate, sKeyboardRepeatDelay) < B_OK)
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if (set_typematic(key_repeat_rate, sKeyboardRepeatDelay) != B_OK)
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return B_ERROR;
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sKeyboardRepeatRate = key_repeat_rate;
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return B_OK;
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@ -354,16 +404,18 @@ keyboard_ioctl(void *cookie, uint32 op, void *buffer, size_t length)
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case KB_GET_KEY_REPEAT_RATE:
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{
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TRACE("ps2: ioctl KB_GET_KEY_REPEAT_RATE\n");
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return user_memcpy(buffer, &sKeyboardRepeatRate, sizeof(sKeyboardRepeatRate));
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return user_memcpy(buffer, &sKeyboardRepeatRate,
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sizeof(sKeyboardRepeatRate));
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}
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case KB_SET_KEY_REPEAT_DELAY:
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{
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bigtime_t key_repeat_delay;
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TRACE("ps2: ioctl KB_SET_KEY_REPEAT_DELAY\n");
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if (user_memcpy(&key_repeat_delay, buffer, sizeof(key_repeat_delay)) < B_OK)
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if (user_memcpy(&key_repeat_delay, buffer, sizeof(key_repeat_delay))
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!= B_OK)
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return B_BAD_ADDRESS;
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if (set_typematic(sKeyboardRepeatRate, key_repeat_delay) < B_OK)
|
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if (set_typematic(sKeyboardRepeatRate, key_repeat_delay) != B_OK)
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return B_ERROR;
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sKeyboardRepeatDelay = key_repeat_delay;
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return B_OK;
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@ -373,7 +425,8 @@ keyboard_ioctl(void *cookie, uint32 op, void *buffer, size_t length)
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case KB_GET_KEY_REPEAT_DELAY:
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{
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TRACE("ps2: ioctl KB_GET_KEY_REPEAT_DELAY\n");
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return user_memcpy(buffer, &sKeyboardRepeatDelay, sizeof(sKeyboardRepeatDelay));
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return user_memcpy(buffer, &sKeyboardRepeatDelay,
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sizeof(sKeyboardRepeatDelay));
|
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}
|
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|
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case KB_GET_KEYBOARD_ID:
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@ -389,6 +442,7 @@ keyboard_ioctl(void *cookie, uint32 op, void *buffer, size_t length)
|
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}
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}
|
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device_hooks gKeyboardDeviceHooks = {
|
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keyboard_open,
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keyboard_close,
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@ -1,8 +1,8 @@
|
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/*
|
||||
* Copyright 2002-2006, Axel Dörfler, axeld@pinc-software.de
|
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* Copyright 2002-2009, Axel Dörfler, axeld@pinc-software.de
|
||||
* Copyright 2001, Rob Judd <judd@ob-wan.com>
|
||||
* Copyright 2002, Marcus Overhagen <marcus@overhagen.de>
|
||||
* Distributed under the terms of the Haiku License.
|
||||
* Distributed under the terms of the MIT License.
|
||||
*
|
||||
* Copyright 2001, Travis Geiselbrecht. All rights reserved.
|
||||
* Distributed under the terms of the NewOS License.
|
||||
@ -52,6 +52,7 @@ enum keycodes {
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LEFT_CONTROL = 29,
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|
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LEFT_ALT = 56,
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RIGHT_ALT = 58,
|
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|
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CURSOR_LEFT = 75,
|
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CURSOR_RIGHT = 77,
|
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@ -62,8 +63,8 @@ enum keycodes {
|
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PAGE_UP = 73,
|
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PAGE_DOWN = 81,
|
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|
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BREAK = 198, // TODO: >= 128 can't be valid
|
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DELETE = 83,
|
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SYS_REQ = 84,
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F12 = 88,
|
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};
|
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|
||||
@ -108,7 +109,8 @@ static int32
|
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debug_keyboard_interrupt(void *data)
|
||||
{
|
||||
static bool controlPressed = false;
|
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static bool altPressed;
|
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static bool altPressed = false;
|
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static bool sysReqPressed = false;
|
||||
uint8 key;
|
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|
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key = in8(PS2_PORT_DATA);
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@ -117,8 +119,10 @@ debug_keyboard_interrupt(void *data)
|
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if (key & 0x80) {
|
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if (key == LEFT_CONTROL)
|
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controlPressed = false;
|
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if (key == LEFT_ALT)
|
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else if (key == LEFT_ALT)
|
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altPressed = false;
|
||||
else if (key == SYS_REQ)
|
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sysReqPressed = false;
|
||||
|
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return B_HANDLED_INTERRUPT;
|
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}
|
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@ -129,22 +133,22 @@ debug_keyboard_interrupt(void *data)
|
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break;
|
||||
|
||||
case LEFT_ALT:
|
||||
case RIGHT_ALT:
|
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altPressed = true;
|
||||
break;
|
||||
|
||||
case SYS_REQ:
|
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sysReqPressed = true;
|
||||
break;
|
||||
|
||||
case DELETE:
|
||||
if (controlPressed && altPressed)
|
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arch_cpu_shutdown(true);
|
||||
break;
|
||||
|
||||
/* the following code has two possibilities because of issues
|
||||
* with BeBochs & BeOS (all special keys don't map to anything
|
||||
* useful, and SYS_REQ does a screen dump in BeOS).
|
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* ToDo: remove these key functions some day...
|
||||
*/
|
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case F12:
|
||||
case BREAK:
|
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panic("Keyboard Requested Halt\n");
|
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default:
|
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if (altPressed && sysReqPressed)
|
||||
debug_emergency_key_pressed(kUnshiftedKeymap[key]);
|
||||
break;
|
||||
}
|
||||
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
* Copyright 2008-2009, Ingo Weinhold, ingo_weinhold@gmx.de.
|
||||
* Copyright 2002-2008, Axel Dörfler, axeld@pinc-software.de.
|
||||
* Copyright 2002-2009, Axel Dörfler, axeld@pinc-software.de.
|
||||
* Distributed under the terms of the MIT License.
|
||||
*
|
||||
* Copyright 2001, Travis Geiselbrecht. All rights reserved.
|
||||
@ -63,6 +63,7 @@ static bool sBlueScreenEnabled = false;
|
||||
// must always be false on startup
|
||||
static bool sDebugScreenEnabled = false;
|
||||
static bool sBlueScreenOutput = true;
|
||||
static bool sEmergencyKeysEnabled = true;
|
||||
static spinlock sSpinlock = B_SPINLOCK_INITIALIZER;
|
||||
static int32 sDebuggerOnCPU = -1;
|
||||
|
||||
@ -1239,6 +1240,8 @@ debug_init_post_vm(kernel_args* args)
|
||||
"syslog_debug_output", sSyslogOutputEnabled, sSyslogOutputEnabled);
|
||||
sBlueScreenOutput = get_driver_boolean_parameter(handle,
|
||||
"bluescreen", true, true);
|
||||
sEmergencyKeysEnabled = get_driver_boolean_parameter(handle,
|
||||
"emergency_keys", sEmergencyKeysEnabled, sEmergencyKeysEnabled);
|
||||
|
||||
unload_driver_settings(handle);
|
||||
}
|
||||
@ -1350,6 +1353,30 @@ debug_trap_cpu_in_kdl(bool returnIfHandedOver)
|
||||
}
|
||||
|
||||
|
||||
bool
|
||||
debug_emergency_key_pressed(char key)
|
||||
{
|
||||
if (!sEmergencyKeysEnabled)
|
||||
return false;
|
||||
|
||||
if (key == 'd') {
|
||||
kernel_debugger("Keyboard Requested Halt.");
|
||||
return true;
|
||||
}
|
||||
|
||||
// Broadcast to the kernel debugger modules
|
||||
|
||||
for (uint32 i = 0; i < kMaxDebuggerModules; i++) {
|
||||
if (sDebuggerModules[i] && sDebuggerModules[i]->emergency_key_pressed) {
|
||||
if (sDebuggerModules[i]->emergency_key_pressed(key))
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
// #pragma mark - public API
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user