HelenOS sources

root/uspace/lib/c/arch/arm32/include/libarch/

[..]
config.h cp15.h ddi.h elf_linux.h faddr.h
fibril.h fibril_context.h istate.h istate_struct.h regutils.h
rtld/ stackarg.h syscall.h thread.h tls.h
[..]
HelenOS homepage, sources at GitHub