Promote a handy and often-overlooked sys.exit() feature: Passing it a
string (or any other non-int object) prints it to stderr and exits with
status 1.
See the documentation at
https://docs.python.org/3/library/sys.html#sys.exit.
This indirectly prints some errors to stderr that previously went to
stdout.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
The privilege stacks are not sandboxed inside an MPU region,
so they do not have to be aligned with the stack buffer size.
We fix this by using the PRIVILEGE_STACK_ALIGN macro, which
is defined in arch.h and reflects the minimum alignment
requirement for privilege stack buffers.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Rename reserved function names in arch/ subdirectory. The Python
script gen_priv_stacks.py was updated to follow the 'z_' prefix
naming.
Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>
Some forthcoming kernel object types like futexes need to
be tracked, but do not contain data that is private to
the kernel.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Discovered with pylint3.
Use the placeholder name '_' for unproblematic unused variables. It's
what I'm used to, and pylint knows not to flag it.
Python tip:
for i in range(n):
some_list.append(0)
can be replaced with
some_list += n*[0]
Similarly, 3*'\t' gives '\t\t\t'.
(Relevant here because pylint flagged the loop index as unused.)
To do integer division in Python 3, use // instead of /.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
We have several scripts used by the build system related
to generating code for system calls, privileged mode stacks,
kernel object metadata, and application shared memory
partitions. Add some overview documentation for each.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Dictionaries are iterated in a random order by Python 3.5 and before.
This could have caused "Unstable" CI in PR #13921 and maybe others.
Anyway we want builds to be determimistic by default. Explicit
randomness can be added for better coverage but not by default.
1. When running "make kobj_types_h_target" repeatedly one can observe
that the following .h files keep changing in
build/zephyr/include/generated/:
- kobj-types-enum.h
- otype-to-str.h
- otype-to-size.h
Switching kobjects to OrderedDict makes these 3 .h files deterministic.
2. When running this test repeatedly with CONFIG_USERSPACE=y:
rm build/zephyr/*.gperf && make -C build obj_list
... the dict used for --gperf-output seems to be deterministic, probably
because its keys are all integers (memory addresses). However we can't
take that for granted with Python < 3.6 so out of caution also switch
the output of find_objects() in elf_helper.py to a sorted OrderedDict.
PS: I would normally prefer official Python documentation to
StackOverflow however this one is a good summary and has all the
multiple pointers to the... official Python documentation.
Signed-off-by: Marc Herbert <marc.herbert@intel.com>
This patch converts over the current ELF processing scripts to use the
new elf helper python library.
Signed-off-by: Andy Gross <andy.gross@linaro.org>
This patch adds the generation and incorporation of privileged stack
regions that are used by ARM user mode threads. This patch adds the
infrastructure for privileged stacks. Later patches will utilize the
generated stacks and helper functions.
Signed-off-by: Chunlin Han <chunlin.han@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
Ulf Magnusson