root/arch/x86/um/shared/sysdep/

[..]
  1. archsetjmp.h
  2. archsetjmp_32.h
  3. archsetjmp_64.h
  4. faultinfo.h
  5. faultinfo_32.h
  6. faultinfo_64.h
  7. kernel-offsets.h
  8. mcontext.h
  9. ptrace.h
  10. ptrace_32.h
  11. ptrace_64.h
  12. ptrace_user.h
  13. stub.h
  14. stub_32.h
  15. stub_64.h
  16. syscalls.h
  17. syscalls_32.h
  18. syscalls_64.h
  19. tls.h
[..]