POSIX-UEFI: Difference between revisions
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Don't care. POSIX-UEFI has your back covered and chooses the correct script for you.
=== Code Examples ===▼
The repository contains [https://gitlab.com/bztsrc/posix-uefi/-/tree/master/examples examples] for all the functions that a boot loader might need:▼
* The source for the Hello World example we are talking about
* Querying and displaying command line arguments▼
* Listing directories and loading files (lot simpler to use "fopen" than [[Loading_files_under_UEFI|using UEFI to load files]])▼
* Reading and writing sectors (again, lot simpler than [[Reading_sectors_under_UEFI|using UEFI to read sectors]])▼
* Using the serial port with fprintf to print debug messages▼
* Detecting and listing [[Detecting_Memory_(x86)|memory map]]
* Querying and setting video modes with [[GOP]]▼
* Printing UTF-8 strings with bitmap fonts, similar to [[VGA Fonts]] but proportional▼
* Printing UTF-8 strings with vector based fonts using [[Scalable Screen Font]] library▼
* Loading and blitting PNG images to the screen (without libpng using GOP->Blt)▼
* Loading and parsing [[ELF]] files▼
* Exit Boot Services and pass parameters to an ELF "kernel"▼
You can use these examples as a base for your [[Rolling_Your_Own_Bootloader|bootloader]]. If this isn't enough, then I'd suggest to take a look at the [[BOOTBOOT]] loader.▼
== Creating an EFI executable ==
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</source>
On the other hand, POSIX-UEFI provides standard libc API (hence its name). For example, opening a file goes just like under Linux, you can use fopen. Printing with printf, fprintf; using streams like stdin, stdout, stderr; allocating using malloc / free works the same way as expected on a POSIX compliant system.
▲== Code Examples ==
▲The repository contains [https://gitlab.com/bztsrc/posix-uefi/-/tree/master/examples examples] for all the functions that a boot loader might need:
▲* Querying and displaying command line arguments
▲* Listing directories and loading files (lot simpler to use "fopen" than [[Loading_files_under_UEFI|using UEFI to load files]])
▲* Reading and writing sectors (again, lot simpler than [[Reading_sectors_under_UEFI|using UEFI to read sectors]])
▲* Using the serial port with fprintf to print debug messages
▲* Querying and setting video modes with [[GOP]]
▲* Printing UTF-8 strings with bitmap fonts, similar to [[VGA Fonts]] but proportional
▲* Printing UTF-8 strings with vector based fonts using [[Scalable Screen Font]] library
▲* Loading and blitting PNG images to the screen (without libpng using GOP->Blt)
▲* Loading and parsing [[ELF]] files
▲* Exit Boot Services and pass parameters to an ELF "kernel"
▲You can use these examples as a base for your [[Rolling_Your_Own_Bootloader|bootloader]]. If this isn't enough, then I'd suggest to take a look at the [[BOOTBOOT]] loader.
== See also ==
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