BPF_PPC_EXC_STACKFRAME
frame_nvr_size = BPF_PPC_EXC_STACKFRAME;
BPF_PPC_EXC_STACKFRAME :
-BPF_PPC_EXC_STACKFRAME));
EMIT(PPC_RAW_STDU(_R1, _R1, -(BPF_PPC_EXC_STACKFRAME + ctx->stack_size)));