CONFIG_USERSPACE¶
User mode threads
Type: bool
Help¶
When enabled, threads may be created or dropped down to user mode,
which has significantly restricted permissions and must interact
with the kernel via system calls. See Zephyr documentation for more
details about this feature.
If a user thread overflows its stack, this will be caught and the
kernel itself will be shielded from harm. Enabling this option
may or may not catch stack overflows when the system is in
privileged mode or handling a system call; to ensure these are always
caught, enable CONFIG_HW_STACK_PROTECTION.
Direct dependencies¶
ARCH_HAS_USERSPACE && RUNTIME_ERROR_CHECKS && SRAM_REGION_PERMISSIONS
(Includes any dependencies from ifs and menus.)
Defaults¶
No defaults. Implicitly defaults to n.
Symbols selected by this symbol¶
Symbols that select this symbol¶
Kconfig definition¶
At arch/Kconfig:246
Included via Kconfig:8 → Kconfig.zephyr:39
Menu path: (Top) → General Architecture Options
config USERSPACE
bool "User mode threads"
select THREAD_STACK_INFO
depends on ARCH_HAS_USERSPACE && RUNTIME_ERROR_CHECKS && SRAM_REGION_PERMISSIONS
help
When enabled, threads may be created or dropped down to user mode,
which has significantly restricted permissions and must interact
with the kernel via system calls. See Zephyr documentation for more
details about this feature.
If a user thread overflows its stack, this will be caught and the
kernel itself will be shielded from harm. Enabling this option
may or may not catch stack overflows when the system is in
privileged mode or handling a system call; to ensure these are always
caught, enable CONFIG_HW_STACK_PROTECTION.
(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)