root/drivers/firmware/efi/libstub/

[..]
  1. arm-stub.c
  2. arm32-stub.c
  3. arm64-stub.c
  4. efi-stub-helper.c
  5. efistub.h
  6. fdt.c
  7. gop.c
  8. random.c
  9. secureboot.c
  10. string.c
  11. tpm.c
[..]