UPT_R8             59 arch/x86/um/asm/ptrace.h #define PT_REGS_R8(r) UPT_R8(&(r)->regs)
UPT_R8             57 arch/x86/um/shared/sysdep/ptrace_64.h #define UPT_SYSCALL_ARG5(r) UPT_R8(r)