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posix-uefi/utils/README.md

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POSIX-UEFI Utilities

These are small portable commands to help you with the UEFI toolchain (libc only, no EFI headers needed). They convert the .efi output that you've compiled with POSIX-UEFI into different file formats required by the UEFI firmware.

  • efirom - creates a PCI Option ROM image
POSIX-UEFI utils - efirom by Michael Brown GPL

./efirom [--vendor=VVVV] [--device=DDDD] infile outfile
  • efiffs - creates a DXE UEFI driver image (see this wiki on how to add it to a firmware).
POSIX-UEFI utils - efiffs by bztsrc@gitlab MIT

./efiffs [-g <guid>] [-n <name>] [-v <ver>] [-t <type>] [-p <type>] infile [outfile]

  -g <guid>   specify the GUID (defaults to random)
  -n <name>   specify the driver's name (eg 'FAT')
  -v <ver>    specify the driver's version (eg '1.0')
  -t <type>   specify the ffs type (defaults to 7, EFI_FV_FILETYPE_DRIVER)
  -p <type>   specify the pe section type (defaults to 16, EFI_SECTION_PE32)
  infile      input .efi file
  outfile     output file name (default generated from infile)
  • efidsk - creates a bootable disk image with EFI System Partition from the contents of a directory. Copy the POSIX-UEFI compiled file under the given directory as EFI/BOOT/BOOTX64.EFI to get it automatically booted.
POSIX-UEFI utils - efidsk by bztsrc@gitlab MIT

./efidsk [-p] [-s <size>] indir outfile

  -p          save only the partition image without GPT
  -s <size>   set the size of partition in megabytes (defaults to 33M)
  indir       use the contents of this directory
  outfile     output image file name