The packed log message needs a unpacker.

[JiangYizuo]

e.g.

ZILOG("This is an example. arguments : %d, %c, %s\n", 1, 'a', "string");
meta-data [][][][] [] [][][][][][][]
[meta-data] [0x00000001] [a] [string\0]
-->
var_list args;
va_start(args, ??); //hack method to get pointer args.
args->fp_offset = ?
args->gp_offset = ?
args->reg_save_area = ?
args->overflow_arg_area = ?
...