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scripts: gen_priv_stacks.py: use the right alignment for priv stacks

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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>
This commit is contained in:
Ioannis Glaropoulos 2019-06-13 18:11:58 +02:00 • committed by Andrew Boie
commit 88959e75dd
1 changed files with 3 additions and 1 deletions
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scripts/gen_priv_stacks.py
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@ -39,8 +39,10 @@ header = """%compare-lengths
"""
# Each privilege stack buffer needs to respect the alignment
# constraints as specified in arm/arch.h.
priv_stack_decl_temp = ("static u8_t __used"
" __aligned(CONFIG_PRIVILEGED_STACK_SIZE)"
" __aligned(Z_PRIVILEGE_STACK_ALIGN)"
" priv_stack_%x[CONFIG_PRIVILEGED_STACK_SIZE];\n")