200 lines
6.6 KiB
C
200 lines
6.6 KiB
C
/****************************************************************************
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* include/nuttx/userspace.h
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_USERSPACE_H
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#define __INCLUDE_NUTTX_USERSPACE_H
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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 <sys/types.h>
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#include <stdint.h>
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#include <signal.h>
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#include <pthread.h>
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#include <nuttx/arch.h>
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#ifdef CONFIG_BUILD_PROTECTED
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* If CONFIG_BUILD_PROTECTED, then CONFIG_NUTTX_USERSPACE must be defined to
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* provide the address where the user-space header can be found in memory.
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*/
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#ifndef CONFIG_NUTTX_USERSPACE
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# error "CONFIG_NUTTX_USERSPACE is not defined"
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#endif
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/* Let's insist on 4-byte alignment. This alignment may not be required
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* technically for all platforms. However, neither is it an unreasonable
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* requirement for any platform.
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*/
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#if (CONFIG_NUTTX_USERSPACE & 3) != 0
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# warning "CONFIG_NUTTX_USERSPACE is not aligned to a 4-byte boundary"
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#endif
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/* Helper Macros ************************************************************/
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/* This macro is used to access the struct userpace_s header that can be
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* found at the beginning of the user-space blob.
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*/
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#define USERSPACE ((FAR struct userspace_s *)CONFIG_NUTTX_USERSPACE)
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/* In user space, these functions are directly callable. In kernel space,
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* they can be called through the userspace structure.
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*/
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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struct mm_heaps_s; /* Forward reference */
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/* Every user-space blob starts with a header that provides information about
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* the blob. The form of that header is provided by struct userspace_s. An
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* instance of this structure is expected to reside at CONFIG_NUTTX_USERSPACE.
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*/
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struct userspace_s
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{
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/* General memory map */
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main_t us_entrypoint;
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uintptr_t us_textstart;
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uintptr_t us_textend;
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uintptr_t us_datasource;
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uintptr_t us_datastart;
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uintptr_t us_dataend;
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uintptr_t us_bssstart;
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uintptr_t us_bssend;
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/* Memory manager heap structure */
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FAR struct mm_heap_s *us_heap;
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/* Task/thread startup routines */
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void (*task_startup)(main_t entrypt, int argc, FAR char *argv[])
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noreturn_function;
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#ifndef CONFIG_DISABLE_PTHREAD
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void (*pthread_startup)(pthread_startroutine_t entrypt,
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pthread_addr_t arg);
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#endif
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/* Signal handler trampoline */
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#ifndef CONFIG_DISABLE_SIGNALS
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void (*signal_handler)(_sa_sigaction_t sighand, int signo,
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FAR siginfo_t *info, FAR void *ucontext);
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#endif
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/* User-space work queue support */
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#ifdef CONFIG_LIB_USRWORK
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int (*work_usrstart)(void);
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#endif
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};
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: task_startup
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*
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* Description:
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* This function is the user-space, task startup function. It is called
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* from up_task_start() in user-mode.
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*
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* Inputs:
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* entrypt - The user-space address of the task entry point
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* argc and argv - Standard arguments for the task entry point
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*
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* Return:
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* None. This function does not return.
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*
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****************************************************************************/
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#if defined(CONFIG_BUILD_PROTECTED) && !defined(__KERNEL__)
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void task_startup(main_t entrypt, int argc, FAR char *argv[]) noreturn_function;
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#endif
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/****************************************************************************
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* Name: pthread_startup
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*
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* Description:
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* This function is the user-space, pthread startup function. It is called
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* from up_pthread_start() in user-mode.
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*
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* Inputs:
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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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* Return:
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* None. This function does not return.
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*
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****************************************************************************/
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#if defined(CONFIG_BUILD_PROTECTED) && !defined(__KERNEL__) && !defined(CONFIG_DISABLE_PTHREAD)
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void pthread_startup(pthread_startroutine_t entrypt, pthread_addr_t arg);
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_BUILD_PROTECTED */
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#endif /* __INCLUDE_NUTTX_USERSPACE_H */
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