UPT_SYSCALL_ARG3   17 arch/x86/um/shared/sysdep/ptrace_32.h #define UPT_SYSCALL_ARG3(r) UPT_DX(r)
UPT_SYSCALL_ARG3   55 arch/x86/um/shared/sysdep/ptrace_64.h #define UPT_SYSCALL_ARG3(r) UPT_DX(r)