Lines Matching full:stack

19  * Note about stack usage:
23  * - kernel threads are running in EL1 using SP_EL1 as stack pointer during
25  *   running in a privileged stack that is their own.
27  * - user threads are running in EL0 using SP_EL0 as stack pointer during
29  *   stack pointer switches to SP_EL1 and the execution starts using the
30  *   privileged portion of the user stack without touching SP_EL0. This portion
33  * - a stack guard region will be added bellow the kernel stack when
35  *   to the safe exception stack in the kernel space. For the kernel thread,
36  *   SP_EL0 will not change always pointing to safe exception stack. For the
37  *   userspace thread, SP_EL0 will switch from the user stack to the safe
38  *   exception stack when entering the EL1 mode, and restore to the user stack
49  *    +---------------+ <- stack limit
50  *    |  Stack guard  | } Z_ARM64_STACK_GUARD_SIZE (protected by MMU/MPU)
65  *  E |     ESF       |               |  Privileged portion of the stack
68  *    +---------------+ <- stack limit|
69  *    |  Stack guard  | } Z_ARM64_STACK_GUARD_SIZE (protected by MMU/MPU)
85 void arch_new_thread(struct k_thread *thread, k_thread_stack_t *stack,  in arch_new_thread()  argument
99 	 * The ESF is now hosted at the top of the stack. For user threads this  in arch_new_thread()
149 	thread->arch.stack_limit = (uint64_t)stack + Z_ARM64_STACK_GUARD_SIZE;  in arch_new_thread()
161 	/* Map the thread stack */  in arch_user_mode_enter()
164 	/* Top of the user stack area */  in arch_user_mode_enter()
169 	/* Top of the privileged non-user-accessible part of the stack */  in arch_user_mode_enter()