mirror of
https://github.com/apache/nuttx.git
synced 2026-09-15 07:01:05 +00:00
879d38d511
Most tools used for compliance and SBOM generation use SPDX identifiers This change brings us a step closer to an easy SBOM generation. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
85 lines
3.1 KiB
C
85 lines
3.1 KiB
C
/****************************************************************************
|
|
* arch/arm64/src/common/arm64_task_start.c
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <nuttx/arch.h>
|
|
#include <assert.h>
|
|
|
|
#include <arch/syscall.h>
|
|
|
|
#include "arm64_internal.h"
|
|
|
|
#include "sched/sched.h"
|
|
|
|
#ifndef CONFIG_BUILD_FLAT
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: up_task_start
|
|
*
|
|
* Description:
|
|
* In this kernel mode build, this function will be called to execute a
|
|
* task in user-space. When the task is first started, a kernel-mode
|
|
* stub will first run to perform some housekeeping functions. This
|
|
* kernel-mode stub will then be called transfer control to the user-mode
|
|
* task.
|
|
*
|
|
* Normally the a user-mode start-up stub will also execute before the
|
|
* task actually starts. See libc/sched/task_startup.c
|
|
*
|
|
* Input Parameters:
|
|
* taskentry - The user-space entry point of the task.
|
|
* argc - The number of parameters being passed.
|
|
* argv - The parameters being passed. These lie in kernel-space memory
|
|
* and will have to be reallocated in user-space memory.
|
|
*
|
|
* Returned Value:
|
|
* This function should not return. It should call the user-mode start-up
|
|
* stub and that stub should call exit if/when the user task terminates.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void up_task_start(main_t taskentry, int argc, char *argv[])
|
|
{
|
|
struct tcb_s *rtcb = this_task();
|
|
|
|
/* Set up to return to the user-space _start function in
|
|
* unprivileged mode. We need:
|
|
*
|
|
* R0 = argc
|
|
* R1 = argv
|
|
* ELR = taskentry
|
|
* SPSR = user mode
|
|
*/
|
|
|
|
arm64_jump_to_user((uint64_t)taskentry, (uint64_t)argc, (uint64_t)argv,
|
|
(uint64_t)rtcb->xcp.ustkptr, rtcb->xcp.initregs);
|
|
}
|
|
|
|
#endif /* !CONFIG_BUILD_FLAT */
|