syscall.h File Reference

#include <zephyr/syscall_list.h>
#include <zephyr/arch/syscall.h>
#include <stdbool.h>
#include <zephyr/types.h>
#include <zephyr/linker/sections.h>

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Functions
static __pinned_func bool	k_is_user_context (void)
	Indicate whether the CPU is currently in user mode.

Function Documentation

k_is_user_context()

__pinned_func bool k_is_user_context ( void )

inlinestatic

Indicate whether the CPU is currently in user mode.

Returns

true if the CPU is currently running with user permissions

CAUTION! If you branch on k_is_user_context() and then perform a kernel-only operation, you must insert a memory barrier before the privileged operation. Both the compiler and the CPU may reorder memory operations around the branch. Without a barrier, memory accesses related to the privileged path may move before the context check or be speculated.