Hi, Previously I have run oprofile on linux-mips and have two questions about it. It seems that oprofile does not support callgraph on linux-mips currently, since there is no backtrace function in oprofile kernel module for mips target. Is it possible or easy to support callgraph on mips target? If I am right, it's some kind of difficult to calculate stack frames of interrupted user space programs, at least for O32 ABI. Any tips would be appriciated. thanks. -- Best Regards.