CONFIG_MPU_STACK_GUARD_MIN_SIZE_FLOAT¶
(No prompt – not directly user assignable.)
Type: int
Help¶
Minimum size (and alignment when applicable) of an ARM MPU
region, which guards the stack of a thread that is using the
Floating Point (FP) context. The width of the guard is set to
128, to accommodate the length of a Cortex-M exception stack
frame when the floating point context is active. The FP context
is only stacked in sharing FP registers mode, therefore, the
option is applicable only when FPU_SHARING is selected.
Direct dependencies¶
MPU_STACK_GUARD && FPU_SHARING && ARM_MPU && CPU_HAS_MPU && ARM
(Includes any dependencies from ifs and menus.)
Default¶
128
Kconfig definition¶
At arch/arm/core/aarch32/mpu/Kconfig:64
Included via Kconfig:8 → Kconfig.zephyr:39 → arch/Kconfig:12 → arch/arm/Kconfig:57 → arch/arm/core/aarch32/Kconfig:297
Menu path: (Top) → ARM Options → Thread Stack Guards
config MPU_STACK_GUARD_MIN_SIZE_FLOAT
int
default 128
depends on MPU_STACK_GUARD && FPU_SHARING && ARM_MPU && CPU_HAS_MPU && ARM
help
Minimum size (and alignment when applicable) of an ARM MPU
region, which guards the stack of a thread that is using the
Floating Point (FP) context. The width of the guard is set to
128, to accommodate the length of a Cortex-M exception stack
frame when the floating point context is active. The FP context
is only stacked in sharing FP registers mode, therefore, the
option is applicable only when FPU_SHARING is selected.
(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)