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authorJason Wessel <jason.wessel@windriver.com>2010-05-21 04:04:30 +0200
committerJason Wessel <jason.wessel@windriver.com>2010-05-21 04:04:30 +0200
commit9731191f75a54c4fa17e9b9b88f3144cf4b47836 (patch)
treed9e0addc32948eab6755ba98c92dfb4d995200ce /drivers/serial/kgdboc.c
parentx86,early dr regs,kgdb: Allow kernel debugger early dr register access (diff)
downloadlinux-9731191f75a54c4fa17e9b9b88f3144cf4b47836.tar.xz
linux-9731191f75a54c4fa17e9b9b88f3144cf4b47836.zip
kgdboc: Add ekgdboc for early use of the kernel debugger
The ekgdboc= differs from kgdboc= in that you can begin debuggin as soon as the exceptions are setup and the kgdb I/O driver is available, instead of waiting until the tty subsystem is available. CC: kgdb-bugreport@lists.sourceforge.net Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'drivers/serial/kgdboc.c')
-rw-r--r--drivers/serial/kgdboc.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/serial/kgdboc.c b/drivers/serial/kgdboc.c
index b765ab48dfe7..a9a94ae72349 100644
--- a/drivers/serial/kgdboc.c
+++ b/drivers/serial/kgdboc.c
@@ -223,6 +223,25 @@ static struct kgdb_io kgdboc_io_ops = {
.post_exception = kgdboc_post_exp_handler,
};
+#ifdef CONFIG_KGDB_SERIAL_CONSOLE
+/* This is only available if kgdboc is a built in for early debugging */
+int __init kgdboc_early_init(char *opt)
+{
+ /* save the first character of the config string because the
+ * init routine can destroy it.
+ */
+ char save_ch;
+
+ kgdboc_option_setup(opt);
+ save_ch = config[0];
+ init_kgdboc();
+ config[0] = save_ch;
+ return 0;
+}
+
+early_param("ekgdboc", kgdboc_early_init);
+#endif /* CONFIG_KGDB_SERIAL_CONSOLE */
+
module_init(init_kgdboc);
module_exit(cleanup_kgdboc);
module_param_call(kgdboc, param_set_kgdboc_var, param_get_string, &kps, 0644);