PT_REGS_PARM2
long ptr = PT_REGS_PARM2(ctx);
bpf_core_read(&sd, sizeof(sd), (void *)PT_REGS_PARM2(ctx));
bpf_core_read(&sd, sizeof(sd), (void *)PT_REGS_PARM2(ctx));
#define ___bpf_kprobe_args2(x, args...) ___bpf_kprobe_args1(args), (unsigned long long)PT_REGS_PARM2(ctx)