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kdb: core for kgdb back end (2 of 2)

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This patch contains the hooks and instrumentation into kernel which
live outside the kernel/debug directory, which the kdb core
will call to run commands like lsmod, dmesg, bt etc...

CC: linux-arch@vger.kernel.org
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Martin Hicks <mort@sgi.com>
This commit is contained in:
Jason Wessel
2010-05-20 21:04:21 -05:00
parent 5d5314d679
commit 67fc4e0cb9
9 changed files with 92 additions and 3 deletions
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kernel/printk.c
+16
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@@ -413,6 +413,22 @@ SYSCALL_DEFINE3(syslog, int, type, char __user *, buf, int, len)
return do_syslog(type, buf, len, SYSLOG_FROM_CALL);
}
#ifdef CONFIG_KGDB_KDB
/* kdb dmesg command needs access to the syslog buffer. do_syslog()
* uses locks so it cannot be used during debugging. Just tell kdb
* where the start and end of the physical and logical logs are. This
* is equivalent to do_syslog(3).
*/
void kdb_syslog_data(char *syslog_data[4])
{
syslog_data[0] = log_buf;
syslog_data[1] = log_buf + log_buf_len;
syslog_data[2] = log_buf + log_end -
(logged_chars < log_buf_len ? logged_chars : log_buf_len);
syslog_data[3] = log_buf + log_end;
}
#endif /* CONFIG_KGDB_KDB */
/*
* Call the console drivers on a range of log_buf
*/