x86: implements arch_thread_priv_stack_space_get (d736af8d) · Commits · Wenxi XU / zephyr

arch/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -95,6 +95,7 @@ config X86
		&& !SOC_HAS_TIMING_FUNCTIONS
		select ARCH_HAS_STACK_CANARIES_TLS
		select ARCH_SUPPORTS_MEM_MAPPED_STACKS if X86_MMU && !DEMAND_PAGING
		select ARCH_HAS_THREAD_PRIV_STACK_SPACE_GET if USERSPACE
		help
		x86 architecture

+18 −0

Original line number	Diff line number	Diff line
		@@ -4,6 +4,8 @@
		* SPDX-License-Identifier: Apache-2.0
		*/

		#include <errno.h>

		#include <zephyr/kernel.h>
		#include <zephyr/sys/speculation.h>
		#include <zephyr/internal/syscall_handler.h>
		@@ -183,3 +185,19 @@ FUNC_NORETURN void arch_user_mode_enter(k_thread_entry_t user_entry,
		_current->stack_info.start);
		CODE_UNREACHABLE;
		}

		int arch_thread_priv_stack_space_get(const struct k_thread thread, size_t stack_size,
		size_t *unused_ptr)
		{
		struct z_x86_thread_stack_header *hdr_stack_obj;

		if ((thread->base.user_options & K_USER) != K_USER) {
		return -EINVAL;
		}

		hdr_stack_obj = (struct z_x86_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);
		}