LC

Create Simple UEFI Application that Prints Hello World

hard3/8

Use BIOS Disk Services to Read Sectors from Disk Parse ACPI Tables for Hardware Discovery

Language

Compiler

2.0s Limit 256MB

Implementation

Create a minimal UEFI Hello World application.

Requirements:

Use UEFI API to print text
Include proper UEFI headers
Implement UEFI entry point (UefiMain or efi_main)
Use EFI_SYSTEM_TABLE for console output
Compile to .efi executable format
Display multiple lines of text
Show UEFI firmware vendor and version
Print memory map information
Demonstrate understanding of UEFI architecture
Include build instructions

Why This Matters

The `UefiMain(ImageHandle, SystemTable)` entry point you write here is identical in shape to real bootloaders built against EDK2/TianoCore (the open-source reference implementation coreboot and most OEM firmware derive from), and GNU-EFI is the exact toolchain systemd-boot and rEFInd use to compile their .efi binaries. Getting the EFI_SYSTEM_TABLE plumbing wrong is the difference between a working UEFI app and a firmware hang.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0