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| author | Jason Wessel <jason.wessel@windriver.com> | 2010-08-05 16:22:30 +0200 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2010-08-05 16:22:30 +0200 |
| commit | 408a4be1f8cbee511895ee07da2a007a5a24303f (patch) | |
| tree | 9d31d812ffe9eaec638f0698b3e6ba913ca51a7e | |
| parent | vt,console,kdb: automatically set kdb LINES variable (diff) | |
| download | linux-408a4be1f8cbee511895ee07da2a007a5a24303f.tar.xz linux-408a4be1f8cbee511895ee07da2a007a5a24303f.zip | |
kgdboc: Add call backs to allow kernel mode switching
Add the kms keyword processing to kgdboc and the callbacks to invoke
console switching when ever kgdboc is started with "kgdboc=kms,kbd".
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| -rw-r--r-- | drivers/serial/kgdboc.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/serial/kgdboc.c b/drivers/serial/kgdboc.c index a9a94ae72349..39f9a1adaa75 100644 --- a/drivers/serial/kgdboc.c +++ b/drivers/serial/kgdboc.c @@ -17,6 +17,7 @@ #include <linux/kdb.h> #include <linux/tty.h> #include <linux/console.h> +#include <linux/vt_kern.h> #define MAX_CONFIG_LEN 40 @@ -31,6 +32,7 @@ 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; @@ -104,6 +106,12 @@ 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 +209,14 @@ 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 +227,10 @@ 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(); + } } static struct kgdb_io kgdboc_io_ops = { |