Previously a so-called utcb shared page was used for transfering
data between posix services. This was a special shmat/get/dt case
allocating from its own virtual pool. Now the term utcb is renamed
as a shared page and integrated with the shm* handling routines.
Generic l4 threads will use long-ipc and not this method. Posix
services will continue to communicate on a shared page for now.
modified: tasks/libl4/include/l4lib/ipcdefs.h
modified: tasks/libl4/src/init.c
new file: tasks/libposix/init.c
modified: tasks/mm0/include/shm.h
modified: tasks/mm0/include/task.h
deleted: tasks/mm0/include/utcb.h
modified: tasks/mm0/main.c
modified: tasks/mm0/src/boot.c
modified: tasks/mm0/src/clone.c
modified: tasks/mm0/src/execve.c
modified: tasks/mm0/src/exit.c
modified: tasks/mm0/src/init.c
modified: tasks/mm0/src/shm.c
modified: tasks/mm0/src/task.c
deleted: tasks/mm0/src/utcb.c
deleted: tools/l4-qemu
- Added cleaner allocation of shm addresses by moving the allocation to do_mmap().
- Added deletion routine for all objects: shadow, vm_file of type vfs_file, shm_file, etc.
- Need to make sure objects get deleted properly after exit().
- Currently we allow a single, unique virtual address for each shm segment.
Now all system calls can simply return their final values and they
will be sent to client parties from a single location. Should have had this
simple cleanup a long time ago.
Environment is backed by a special per-task file maintained by mm0 for each task.
This file is filled in by the env pager, by simple copying of env data into the
faulty page upon a fault. UTCB and all anon regions (stack) could use the same
scheme.
Fixed IS_ERR(x) to accept negative values that are above -1000 for errors. This
protects against false positives for pointers such as 0xE0000000.
modified: include/l4/generic/scheduler.h
modified: include/l4/macros.h
modified: src/arch/arm/exception.c
modified: tasks/fs0/include/linker.lds
modified: tasks/libl4/src/init.c
modified: tasks/libposix/shm.c
new file: tasks/mm0/include/env.h
modified: tasks/mm0/include/file.h
new file: tasks/mm0/include/lib/addr.h
deleted: tasks/mm0/include/lib/vaddr.h
modified: tasks/mm0/include/task.h
new file: tasks/mm0/include/utcb.h
new file: tasks/mm0/src/env.c
modified: tasks/mm0/src/fault.c
modified: tasks/mm0/src/file.c
modified: tasks/mm0/src/init.c
new file: tasks/mm0/src/lib/addr.c
modified: tasks/mm0/src/lib/idpool.c
deleted: tasks/mm0/src/lib/vaddr.c
modified: tasks/mm0/src/mmap.c
modified: tasks/mm0/src/shm.c
modified: tasks/mm0/src/task.c
new file: tasks/mm0/src/utcb.c
modified: tasks/test0/include/linker.lds
