Commit 55ee97c7 authored by Daniel Leung's avatar Daniel Leung Committed by Anas Nashif
Browse files

xtensa: implements arch_thread_priv_stack_space_get 



This implements arch_thread_priv_stack_space_get() so this can
be used to figure out how much privileged stack space is used.

Signed-off-by: default avatarDaniel Leung <daniel.leung@intel.com>
parent 1dc02fcb

arch/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -136,6 +136,7 @@ config XTENSA 
	select ARCH_MEM_DOMAIN_DATA if USERSPACE

	select ARCH_HAS_DIRECTED_IPIS

	select THREAD_STACK_INFO

	select ARCH_HAS_THREAD_PRIV_STACK_SPACE_GET if USERSPACE

	help

	  Xtensa architecture

arch/xtensa/core/thread.c

+17 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
 * SPDX-License-Identifier: Apache-2.0

 */



#include <errno.h>

#include <string.h>



#include <zephyr/kernel.h>
@@ -170,4 +171,20 @@ FUNC_NORETURN void arch_user_mode_enter(k_thread_entry_t user_entry, 


	CODE_UNREACHABLE;

}



int arch_thread_priv_stack_space_get(const struct k_thread *thread, size_t *stack_size,

				     size_t *unused_ptr)

{

	struct xtensa_thread_stack_header *hdr_stack_obj;



	if ((thread->base.user_options & K_USER) != K_USER) {

		return -EINVAL;

	}



	hdr_stack_obj = (struct xtensa_thread_stack_header *)thread->stack_obj;



	return z_stack_space_get(&hdr_stack_obj->privilege_stack[0],

				 sizeof(hdr_stack_obj->privilege_stack),

				 unused_ptr);

}

#endif /* CONFIG_USERSPACE */

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