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https://github.com/apache/nuttx.git
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be9d0665e4
Add CONFIG_BUILD_PROTECTED support alongside CONFIG_BUILD_KERNEL for saved register pointers and task startup functions. Fix arm64_fork() to properly handle Thumb bit masking. Enable weak_function for up_allocate_kheap() to support board-specific heap allocation. Signed-off-by: hujun5 <hujun5@xiaomi.com>
95 lines
3.5 KiB
C
95 lines
3.5 KiB
C
/****************************************************************************
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* arch/arm64/src/common/arm64_pthread_start.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <pthread.h>
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#include <nuttx/arch.h>
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#include <assert.h>
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#include <arch/syscall.h>
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#include "arm64_internal.h"
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#include "sched/sched.h"
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#if !defined(CONFIG_BUILD_FLAT) && defined(__KERNEL__) && \
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!defined(CONFIG_DISABLE_PTHREAD)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_pthread_start
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*
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* Description:
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* In this kernel mode build, this function will be called to execute a
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* pthread in user-space. When the pthread is first started, a kernel-mode
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* stub will first run to perform some housekeeping functions. This
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* kernel-mode stub will then be called transfer control to the user-mode
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* pthread.
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*
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* Normally the a user-mode start-up stub will also execute before the
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* pthread actually starts. See libc/pthread/pthread_create.c
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*
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* Input Parameters:
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* startup - The user-space pthread startup function
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* entrypt - The user-space address of the pthread entry point
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* arg - Standard argument for the pthread entry point
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*
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* Returned Value:
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* This function should not return. It should call the user-mode start-up
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* stub and that stub should call pthread_exit if/when the user pthread
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* terminates.
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*
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****************************************************************************/
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void up_pthread_start(pthread_trampoline_t startup,
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pthread_startroutine_t entrypt, pthread_addr_t arg)
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{
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struct tcb_s *rtcb = this_task();
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/* Set up to enter the user-space pthread start-up function in
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* unprivileged mode. We need:
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*
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* R0 = entrypt
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* R1 = arg
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* ELR = startup
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* SPSR = user mode
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*/
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#ifdef CONFIG_BUILD_KERNEL
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arm64_jump_to_user((uint64_t)startup, (uint64_t)entrypt,
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(uint64_t)arg, 0,
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(uint64_t)rtcb->xcp.ustkptr, rtcb->xcp.initregs);
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#elif defined(CONFIG_BUILD_PROTECTED)
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arm64_jump_to_user((uint64_t)USERSPACE->task_startup,
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(uint64_t)startup, (uint64_t)entrypt, (uint64_t)arg,
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(uint64_t)rtcb->xcp.ustkptr, rtcb->xcp.initregs);
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#endif
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}
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#endif /* !CONFIG_BUILD_FLAT && __KERNEL__ && !CONFIG_DISABLE_PTHREAD */
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