[UNIKRAFT PATCH v5 0/3] lib/uksp: Introduce uksp library

[Vlad-Andrei Badoiu <vlad_andrei.badoiu@xxxxxx>]

Currently, we provide a basic implementation of stack smashing
protection that has a global value for all threads. The value
can be either be randomly initialized at boot or precompiled.

Changes since v1:
* We now use a choice based config option for the stack protector level.
* Since
the last version we added the regulat and strong stack protector
options.

Changes since v2:
* Renamed the library to uksp

Changes since v3:
* Added config option for constant value/random source for the canary.
* Updated the config
* Updated library title
* Moved uksp/stackprotector.h to uk/sp.h
* Added current stack pointer to the crash message


Changes since v4:
* rebased over staging
* removed STACKPROTECTOR_NONE
* removed type on license
* __stack_chk_guard is now a const, we use the DECONST macro to change
its value
* renamed INIT_STACK_CANARY to UKSP_INIT_CANARY 
* ukarch_read_sp() is now used to get the sp
* fixed several typos
* moved makefile build flags to patch 1
* added added a comment on why do we use a macro for initialization

Vlad-Andrei BĂDOIU (78692) (3):
  lib/uksp: Introduce uksp library
  build: Add option to toggle the stack protection
  lib/ukboot: Initialize the canary value at boot

 Makefile.uk              |  6 ++++-
 lib/Makefile.uk          |  1 +
 lib/ukboot/boot.c        | 11 ++++++++
 lib/uksp/Config.uk       | 46 +++++++++++++++++++++++++++++++++
 lib/uksp/Makefile.uk     |  9 +++++++
 lib/uksp/exportsyms.uk   |  2 ++
 lib/uksp/include/uk/sp.h | 56 ++++++++++++++++++++++++++++++++++++++++
 lib/uksp/ssp.c           | 52 +++++++++++++++++++++++++++++++++++++
 8 files changed, 182 insertions(+), 1 deletion(-)
 create mode 100644 lib/uksp/Config.uk
 create mode 100644 lib/uksp/Makefile.uk
 create mode 100644 lib/uksp/exportsyms.uk
 create mode 100644 lib/uksp/include/uk/sp.h
 create mode 100644 lib/uksp/ssp.c

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2.20.1