4  * SPDX-License-Identifier: Apache-2.0
31  * in user mode we are going to switch CR3 to the domain-specific tables when
46 	_main_tss.esp0 = (uintptr_t)incoming->arch.psp;  in z_x86_swap_update_page_tables()
55 	uintptr_t ptables_phys = incoming->arch.ptables;  in z_x86_swap_update_page_tables()
69  * Returns the initial entry point to swap into.
75 	if (z_stack_is_user_capable(thread->stack_obj)) {  in z_x86_userspace_prepare_thread()
78 			(struct z_x86_thread_stack_header *)thread->stack_info.mapped.addr;  in z_x86_userspace_prepare_thread()
80 			(struct z_x86_thread_stack_header *)thread->stack_obj;  in z_x86_userspace_prepare_thread()
83 		thread->arch.psp = header->privilege_stack + sizeof(header->privilege_stack);  in z_x86_userspace_prepare_thread()
85 		thread->arch.psp = NULL;  in z_x86_userspace_prepare_thread()
93 	thread->arch.ptables = (uintptr_t)NULL;  in z_x86_userspace_prepare_thread()
96 	if ((thread->base.user_options & K_USER) != 0U) {  in z_x86_userspace_prepare_thread()
114 			(struct z_x86_thread_stack_header *)thread->stack_obj;  in z_x86_userspace_prepare_thread()
116 		(void)memset(&hdr_stack_obj->privilege_stack[0], 0xaa,  in z_x86_userspace_prepare_thread()
117 			     sizeof(hdr_stack_obj->privilege_stack));  in z_x86_userspace_prepare_thread()
133 	 * any old context since this is a one-way operation  in arch_user_mode_enter()
135 	stack_end = Z_STACK_PTR_ALIGN(arch_current_thread()->stack_info.start +  in arch_user_mode_enter()
136 				      arch_current_thread()->stack_info.size -  in arch_user_mode_enter()
137 				      arch_current_thread()->stack_info.delta);  in arch_user_mode_enter()
142 	 * that pushes 8 bytes) the stack must be MISALIGNED by  in arch_user_mode_enter()
143 	 * exactly 8 bytes.  in arch_user_mode_enter()
145 	stack_end -= 8;  in arch_user_mode_enter()
159 	 * arch_current_thread()->stack_info.start.  in arch_user_mode_enter()
166 	stack_start = POINTER_TO_UINT(arch_current_thread()->stack_obj);  in arch_user_mode_enter()
167 	stack_size = K_THREAD_STACK_LEN(arch_current_thread()->stack_info.size);  in arch_user_mode_enter()
174 	stack_size -= CONFIG_MMU_PAGE_SIZE;  in arch_user_mode_enter()
185 			      arch_current_thread()->stack_info.start);  in arch_user_mode_enter()
194 	if ((thread->base.user_options & K_USER) != K_USER) {  in arch_thread_priv_stack_space_get()
195 		return -EINVAL;  in arch_thread_priv_stack_space_get()
198 	hdr_stack_obj = (struct z_x86_thread_stack_header *)thread->stack_obj;  in arch_thread_priv_stack_space_get()
200 	return z_stack_space_get(&hdr_stack_obj->privilege_stack[0],  in arch_thread_priv_stack_space_get()
201 				 sizeof(hdr_stack_obj->privilege_stack),  in arch_thread_priv_stack_space_get()