uniqlibc

Platform support:

• Linux
  • i386, x86_64, arm, aarch64, riscv64, powerpc
• Darwin
  • i386, x86_64, x86_64h, armv4t, armv5, armv6, armv7, armv7s, armv7k, arm64*, arm64e*, arm64_32*
  • arm64 Darwin requires a patched kernel, as XNU doesn't allow static arm64 binaries by default

Building:

To build for x86_64 Linux:

make release

To build for x86_64 Darwin:

make release OS=darwin

To build for arm Linux:

make release ARCH=arm

To build a debug library for x86_64 Linux:

make

To build the tests for x86_64 Linux:

make tests

Porting:

To a new architecture:

• Add some headers for your architecture to include/machine
• Add a folder and an arch.mk to platform/<os>/arch/<arch>
• Add your architecture's code to assembly files, currently just crt/start.S and platform/<os>/src/syscall.S
• (Linux only) add your architecture's syscall definitions to include/sys/linux/syscall.h

To a new kernel:

• Add some headers for your kernel to include/sys/<os>
• Add syscalls in platform/<os>/src/, this should provide functions like read(), write(), open(), etc Try to use as little assembly as possible, the only assembly should be your syscall() function, which all other functions will use
• Add a platform.mk file to platform/<os>/platform.mk (this can add to variables like CFLAGS or be empty)
• Add a folder and an arch.mk to platform/<os>/arch/<arch>

TODO:

• Add support for %a and %g formats in printf.
• Update the whole codebase with comments, especially the stdio parts.
• Optimize malloc, it gets slower when there are a lot of allocations