diff options
Diffstat (limited to 'drivers/serial/kgdboc.c')
| -rw-r--r-- | drivers/serial/kgdboc.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/serial/kgdboc.c b/drivers/serial/kgdboc.c index a9a94ae72349..62b6edc54754 100644 --- a/drivers/serial/kgdboc.c +++ b/drivers/serial/kgdboc.c @@ -17,6 +17,8 @@ #include <linux/kdb.h> #include <linux/tty.h> #include <linux/console.h> +#include <linux/vt_kern.h> +#include <linux/kbd_kern.h> #define MAX_CONFIG_LEN 40 @@ -31,16 +33,21 @@ static struct kparam_string kps = { .maxlen = MAX_CONFIG_LEN, }; +static int kgdboc_use_kms; /* 1 if we use kernel mode switching */ static struct tty_driver *kgdb_tty_driver; static int kgdb_tty_line; #ifdef CONFIG_KDB_KEYBOARD +static bool kgdboc_use_kbd; + static int kgdboc_register_kbd(char **cptr) { + kgdboc_use_kbd = false; if (strncmp(*cptr, "kbd", 3) == 0) { if (kdb_poll_idx < KDB_POLL_FUNC_MAX) { kdb_poll_funcs[kdb_poll_idx] = kdb_get_kbd_char; kdb_poll_idx++; + kgdboc_use_kbd = true; if (cptr[0][3] == ',') *cptr += 4; else @@ -63,9 +70,16 @@ static void kgdboc_unregister_kbd(void) } } } + +static inline void kgdboc_clear_kbd(void) +{ + if (kgdboc_use_kbd) + kbd_dbg_clear_keys(); /* Release all pressed keys */ +} #else /* ! CONFIG_KDB_KEYBOARD */ #define kgdboc_register_kbd(x) 0 #define kgdboc_unregister_kbd() +#define kgdboc_clear_kbd() #endif /* ! CONFIG_KDB_KEYBOARD */ static int kgdboc_option_setup(char *opt) @@ -104,6 +118,12 @@ static int configure_kgdboc(void) kgdboc_io_ops.is_console = 0; kgdb_tty_driver = NULL; + kgdboc_use_kms = 0; + if (strncmp(cptr, "kms,", 4) == 0) { + cptr += 4; + kgdboc_use_kms = 1; + } + if (kgdboc_register_kbd(&cptr)) goto do_register; @@ -201,8 +221,14 @@ static int param_set_kgdboc_var(const char *kmessage, struct kernel_param *kp) return configure_kgdboc(); } +static int dbg_restore_graphics; + static void kgdboc_pre_exp_handler(void) { + if (!dbg_restore_graphics && kgdboc_use_kms) { + dbg_restore_graphics = 1; + con_debug_enter(vc_cons[fg_console].d); + } /* Increment the module count when the debugger is active */ if (!kgdb_connected) try_module_get(THIS_MODULE); @@ -213,6 +239,11 @@ static void kgdboc_post_exp_handler(void) /* decrement the module count when the debugger detaches */ if (!kgdb_connected) module_put(THIS_MODULE); + if (kgdboc_use_kms && dbg_restore_graphics) { + dbg_restore_graphics = 0; + con_debug_leave(); + } + kgdboc_clear_kbd(); } static struct kgdb_io kgdboc_io_ops = { |