[PATCH] kdump: add dmesg gdbmacro into document

	'trapinfo <pid>' will tell you by which trap & possibly

	addresthe kernel paniced.

end

define dmesg

	set $i = 0

	set $end_idx = (log_end - 1) & (log_buf_len - 1)

	while ($i < logged_chars)

		set $idx = (log_end - 1 - logged_chars + $i) & (log_buf_len - 1)

		if ($idx + 100 <= $end_idx) || \

		   ($end_idx <= $idx && $idx + 100 < log_buf_len)

			printf "%.100s", &log_buf[$idx]

			set $i = $i + 100

		else

			printf "%c", log_buf[$idx]

			set $i = $i + 1

		end

	end

end

document dmesg

	print the kernel ring buffer

end