The kernel is a collection of patches to make the standard Linux kernel run on CPUs that do not have an MMU. As a consequence you will encounter some differences between the kernel and the standard Linux behavior:

u no fork() � consider using vfork() instead but beware of the difference of their semantics

u no daemon() � it is usually implemented on top of fork and cannot be easily replaced without changing the semantics.

u fixed stack size -- the stack of an application is set at execution time and cannot grow during runtime. The default stack size is 4k! It can be increased with the "-s" option of m68k-uClinux-elf2flat.

u limited libc compared to glibc -- either add more to libc, or remove some functionality.

u no support for ELF binary file format

u very limited support for shared libraries due to missing MMU -- all applications get linked statically

u mmap() is very inefficient

u no paging -- applications have to be loaded completely into RAM, the heap is very susceptible to fragmentation.

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