lib/ukstore: Introduce the ukstore library
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The `ukstore` library has a dependency to `nolib`/`newlib` and to `ukdebug`. As such they need to be selected to work. The symbols exported will be provided by the `store.c` file. The Makefile contains rules to build all files and generate files. The Makefile first generates a list of all available libraries and then generates two headers and a linker script to create and access sections for each available library. Signed-off-by: Cezar Craciunoiu <cezar.craciunoiu@gmail.com>
This commit adds the possibility to register entries and folders at runtime. Each library will register folders to itself. Entries can be registered to the folders afterwards if the name is known. The entries contain the getters/setters used in passing information. Overall, the dynamic API provides calls to register, free and call entries. All calls are wrapped in macros, meaning that unchecking the library will not break existing builds. The dynamic version calls of the library should still be enclosed in ifdefs to ensure that everything works correctly. Signed-off-by: Cezar Craciunoiu <cezar.craciunoiu@gmail.com>
This commit introduces a method to allocate static elements in library sections. Each library has its own section generated at build. This type of entries do not take up time and are not modified. Also, these entries do not use folders (the folder is the section). These will be used to pass system information getters/setters throughout the system in an easy-enough manner. Interaction with this type of entries is done through the same API as the dynamic ones. Signed-off-by: Cezar Craciunoiu <cezar.craciunoiu@gmail.com>
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These commits introduce a new internal library to Unikraft,
ukstore.The role of this new library is to provide a standard way of passing
information getters/setters from one place to another.
The function pointers are stored in entries and entries are stored in
folders. These are structured in two different ways, statically and
dynamically. The static ones are used for information that does not
change at runtime. The dynamic ones can be added and deleted at runtime
and they are structured differently (section array of folders vs. list
of folders).
To generate sections per library the
AWKtool is used together withthe build system. This library has a dependency only to
nolibc.In order to work, this, already merged, commit is needed: 9d6d855
This library is needed for the porting of Prometheus and other tracks
in the future.
This version isn't final, but it should be ready for USoC21.
Signed-off-by: Cezar Craciunoiu cezar.craciunoiu@gmail.com