/*并发（Concurrent）:多个线程在单个核心运行，同一时间只能一个线程运行，内核不停切换线程，
看起来像同时运行，实际上是线程不停切换
并行（Parallel）每个线程分配给独立的CPU核心，线程同时运行
单核CPU多个进程或多个线程内能实现并发（微观上的串行，宏观上的并行）
多核CPU线程间可以实现宏观和微观上的并行
LITE_OS_SEC_BSS 和 LITE_OS_SEC_DATA_INIT 是告诉编译器这些全局变量放在哪个数据段
* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "los_process_pri.h"
#include "los_sched_pri.h"
#include "los_task_pri.h"
#include "los_hw_pri.h"
#include "los_sem_pri.h"
#include "los_mp.h"
#include "los_exc.h"
#include "asm/page.h"
#ifdef LOSCFG_FS_VFS
#include "fs/fd_table.h"
#include "fs/fs_operation.h"
#endif
#include "time.h"
#include "user_copy.h"
#include "los_signal.h"
#ifdef LOSCFG_SECURITY_VID
#include "vid_api.h"
#endif
#ifdef LOSCFG_SECURITY_CAPABILITY
#include "capability_api.h"
#endif
#include "los_swtmr_pri.h"
#include "los_vm_map.h"
#include "los_vm_phys.h"
#include "los_vm_syscall.h"
LITE_OS_SEC_BSS LosProcessCB *g_processCBArray = NULL;///< 进程池数组
LITE_OS_SEC_DATA_INIT STATIC LOS_DL_LIST g_freeProcess;///< 空闲状态下的进程链表
LITE_OS_SEC_DATA_INIT STATIC LOS_DL_LIST g_processRecycleList;///< 需要回收的进程列表
LITE_OS_SEC_BSS UINT32 g_userInitProcess = OS_INVALID_VALUE;
LITE_OS_SEC_BSS UINT32 g_kernelInitProcess = OS_INVALID_VALUE;
LITE_OS_SEC_BSS UINT32 g_kernelIdleProcess = OS_INVALID_VALUE;
LITE_OS_SEC_BSS UINT32 g_processMaxNum;///< 进程最大数量,默认64个
LITE_OS_SEC_BSS ProcessGroup *g_processGroup = NULL;///< 全局进程组,负责管理所有进程组
//将进程插入到空闲的链表中//
STATIC INLINE VOID OsInsertPCBToFreeList(LosProcessCB *processCB)
{
UINT32 pid = processCB->processID;//获取进程ID
(VOID)memset_s(processCB, sizeof(LosProcessCB), 0, sizeof(LosProcessCB));//进程描述符数据清0
processCB->processID = pid;//进程ID
processCB->processStatus = OS_PROCESS_FLAG_UNUSED;//设置为进程未使用
processCB->timerID = (timer_t)(UINTPTR)MAX_INVALID_TIMER_VID;//timeID初始化值
LOS_ListTailInsert(&g_freeProcess, &processCB->pendList);//进程节点挂入g_freeProcess以分配给后续进程使用
}
STATIC ProcessGroup *OsCreateProcessGroup(UINT32 pid)
{
LosProcessCB *processCB = NULL;
ProcessGroup *group = LOS_MemAlloc(m_aucSysMem1, sizeof(ProcessGroup));
if (group == NULL) {
return NULL;
}
group->groupID = pid;
LOS_ListInit(&group->processList);
LOS_ListInit(&group->exitProcessList);
processCB = OS_PCB_FROM_PID(pid);
LOS_ListTailInsert(&group->processList, &processCB->subordinateGroupList);
processCB->group = group;
processCB->processStatus |= OS_PROCESS_FLAG_GROUP_LEADER;
if (g_processGroup != NULL) {
LOS_ListTailInsert(&g_processGroup->groupList, &group->groupList);
}
return group;
}
/* 退出进程组,参数是进程地址和进程组地址的地址 */
STATIC VOID OsExitProcessGroup(LosProcessCB *processCB, ProcessGroup **group)
{
LosProcessCB *groupProcessCB = OS_PCB_FROM_PID(processCB->group->groupID);
LOS_ListDelete(&processCB->subordinateGroupList);//从进程组进程链表上摘出去
if (LOS_ListEmpty(&processCB->group->processList) && LOS_ListEmpty(&processCB->group->exitProcessList)) {
LOS_ListDelete(&processCB->group->groupList);
groupProcessCB->processStatus &= ~OS_PROCESS_FLAG_GROUP_LEADER;
*group = processCB->group;
if (OsProcessIsUnused(groupProcessCB) && !(groupProcessCB->processStatus & OS_PROCESS_FLAG_EXIT)) {
LOS_ListDelete(&groupProcessCB->pendList);//进程从全局进程链表上摘除
OsInsertPCBToFreeList(groupProcessCB);//释放进程的资源,回到freelist再利用
}
}
processCB->group = NULL;
}
/*通过指定组ID找到进程组 */
STATIC ProcessGroup *OsFindProcessGroup(UINT32 gid)
{
ProcessGroup *group = NULL;
if (g_processGroup->groupID == gid) {
return g_processGroup;
}
LOS_DL_LIST_FOR_EACH_ENTRY(group, &g_processGroup->groupList, ProcessGroup, groupList) {
if (group->groupID == gid) {
return group;
}
}
PRINT_INFO("%s is find group : %u failed!\n", __FUNCTION__, gid);
return NULL;
}
/*给指定进程组发送信号 */
STATIC INT32 OsSendSignalToSpecifyProcessGroup(ProcessGroup *group, siginfo_t *info, INT32 permission)
{
INT32 ret, success, err;
LosProcessCB *childCB = NULL;
success = 0;
ret = -LOS_ESRCH;
LOS_DL_LIST_FOR_EACH_ENTRY(childCB, &(group->processList), LosProcessCB, subordinateGroupList) {
if (childCB->processID == 0) {
continue;
}
err = OsDispatch(childCB->processID, info, permission);
success |= !err;
ret = err;
}
/* At least one success. */
return success ? LOS_OK : ret;
}
//创建进程组//
LITE_OS_SEC_TEXT INT32 OsSendSignalToAllProcess(siginfo_t *info, INT32 permission)
{
INT32 ret, success, err;
ProcessGroup *group = NULL;
success = 0;
err = OsSendSignalToSpecifyProcessGroup(g_processGroup, info, permission);
success |= !err;
ret = err;
/* all processes group */
LOS_DL_LIST_FOR_EACH_ENTRY(group, &g_processGroup->groupList, ProcessGroup, groupList) {
/* all processes in the process group. */
err = OsSendSignalToSpecifyProcessGroup(group, info, permission);
success |= !err;
ret = err;
}
return success ? LOS_OK : ret;
}
LITE_OS_SEC_TEXT INT32 OsSendSignalToProcessGroup(INT32 pid, siginfo_t *info, INT32 permission)
{
ProcessGroup *group = NULL;
/* Send SIG to all processes in process group PGRP.
If PGRP is zero, send SIG to all processes in
the current process's process group. */
group = OsFindProcessGroup(pid ? -pid : LOS_GetCurrProcessGroupID());
if (group == NULL) {
return -LOS_ESRCH;
}
/* all processes in the process group. */
return OsSendSignalToSpecifyProcessGroup(group, info, permission);
}
STATIC LosProcessCB *OsFindGroupExitProcess(ProcessGroup *group, INT32 pid)
{
LosProcessCB *childCB = NULL;
LOS_DL_LIST_FOR_EACH_ENTRY(childCB, &(group->exitProcessList), LosProcessCB, subordinateGroupList) {
if ((childCB->processID == pid) || (pid == OS_INVALID_VALUE)) {
return childCB;
}
}
PRINT_INFO("%s find exit process : %d failed in group : %u\n", __FUNCTION__, pid, group->groupID);
return NULL;
}
STATIC UINT32 OsFindChildProcess(const LosProcessCB *processCB, INT32 childPid)
{
LosProcessCB *childCB = NULL;
if (childPid < 0) {
goto ERR;
}
LOS_DL_LIST_FOR_EACH_ENTRY(childCB, &(processCB->childrenList), LosProcessCB, siblingList) {
if (childCB->processID == childPid) {
return LOS_OK;
}
}
ERR:
PRINT_INFO("%s is find the child : %d failed in parent : %u\n", __FUNCTION__, childPid, processCB->processID);
return LOS_NOK;
}
STATIC LosProcessCB *OsFindExitChildProcess(const LosProcessCB *processCB, INT32 childPid)
{
LosProcessCB *exitChild = NULL;
LOS_DL_LIST_FOR_EACH_ENTRY(exitChild, &(processCB->exitChildList), LosProcessCB, siblingList) {
if ((childPid == OS_INVALID_VALUE) || (exitChild->processID == childPid)) {
return exitChild;
}
}
PRINT_INFO("%s is find the exit child : %d failed in parent : %u\n", __FUNCTION__, childPid, processCB->processID);
return NULL;
}
/* 唤醒等待wakePID结束的任务 */
VOID OsWaitWakeTask(LosTaskCB *taskCB, UINT32 wakePID)
{
taskCB->waitID = wakePID;
OsSchedTaskWake(taskCB);
#ifdef LOSCFG_KERNEL_SMP
LOS_MpSchedule(OS_MP_CPU_ALL);
#endif
}
/* 唤醒等待参数进程结束的任务 */
STATIC BOOL OsWaitWakeSpecifiedProcess(LOS_DL_LIST *head, const LosProcessCB *processCB, LOS_DL_LIST **anyList)
{
LOS_DL_LIST *list = head;
LosTaskCB *taskCB = NULL;
UINT32 pid = 0;
BOOL find = FALSE;
while (list->pstNext != head) {//遍历等待链表 processCB->waitList
taskCB = OS_TCB_FROM_PENDLIST(LOS_DL_LIST_FIRST(list));
if ((taskCB->waitFlag == OS_PROCESS_WAIT_PRO) && (taskCB->waitID == processCB->processID)) {
if (pid == 0) {
pid = processCB->processID;
find = TRUE;
} else {
pid = OS_INVALID_VALUE;
}
OsWaitWakeTask(taskCB, pid);//唤醒这个任务,此时会切到 LOS_Wait runTask->waitFlag = 0;处运行
continue;
}
if (taskCB->waitFlag != OS_PROCESS_WAIT_PRO) {
*anyList = list;
break;
}
list = list->pstNext;
}
return find;
}
/* 检查父进程的等待任务并唤醒父进程去处理等待任务 */
STATIC VOID OsWaitCheckAndWakeParentProcess(LosProcessCB *parentCB, const LosProcessCB *processCB)
{
LOS_DL_LIST *head = &parentCB->waitList;
LOS_DL_LIST *list = NULL;
LosTaskCB *taskCB = NULL;
BOOL findSpecified = FALSE;
if (LOS_ListEmpty(&parentCB->waitList)) {
return;//检查是否有正在等待子进程退出的任务，若没有则退出
}
findSpecified = OsWaitWakeSpecifiedProcess(head, processCB, &list);//找到指定的任务
if (findSpecified == TRUE) {
/* No thread is waiting for any child process to finish */
if (LOS_ListEmpty(&parentCB->waitList)) {//没有线程正在等待任何子进程结束
return;
} else if (!LOS_ListEmpty(&parentCB->childrenList)) {
/* Other child processes exist, and other threads that are waiting
* for the child to finish continue to wait
*///存在其他子进程，正在等待它们的子进程结束而将继续等待
return;
}
}
/* Waiting threads are waiting for a specified child process to finish */
if (list == NULL) {//等待线程正在等待指定的子进程结束
return;
}
/* No child processes exist and all waiting threads are awakened */
if (findSpecified == TRUE) {//所有等待的任务都唤醒
while (list->pstNext != head) {
taskCB = OS_TCB_FROM_PENDLIST(LOS_DL_LIST_FIRST(list));
OsWaitWakeTask(taskCB, OS_INVALID_VALUE);
}
return;
}
while (list->pstNext != head) {//处理 OS_PROCESS_WAIT_GID 标签
taskCB = OS_TCB_FROM_PENDLIST(LOS_DL_LIST_FIRST(list));
if (taskCB->waitFlag == OS_PROCESS_WAIT_GID) {
if (taskCB->waitID != processCB->group->groupID) {
list = list->pstNext;
continue;
}
}
if (findSpecified == FALSE) {
OsWaitWakeTask(taskCB, processCB->processID);
findSpecified = TRUE;
} else {
OsWaitWakeTask(taskCB, OS_INVALID_VALUE);
}
if (!LOS_ListEmpty(&parentCB->childrenList)) {
break;
}
}
return;
}
/* 回收指定进程的资源 */
LITE_OS_SEC_TEXT VOID OsProcessResourcesToFree(LosProcessCB *processCB)
{
if (!(processCB->processStatus & (OS_PROCESS_STATUS_INIT | OS_PROCESS_STATUS_RUNNING))) {
PRINT_ERR("The process(%d) has no permission to release process(%d) resources!\n",
OsCurrProcessGet()->processID, processCB->processID);
}
#ifdef LOSCFG_FS_VFS
if (OsProcessIsUserMode(processCB)) {
delete_files(processCB->files);
}
processCB->files = NULL;
#endif
#ifdef LOSCFG_SECURITY_CAPABILITY
if (processCB->user != NULL) {
(VOID)LOS_MemFree(m_aucSysMem1, processCB->user);//删除用户
processCB->user = NULL;//重置指针为空
}
#endif
OsSwtmrRecycle(processCB->processID);
processCB->timerID = (timer_t)(UINTPTR)MAX_INVALID_TIMER_VID;
#ifdef LOSCFG_SECURITY_VID
if (processCB->timerIdMap.bitMap != NULL) {
VidMapDestroy(processCB);
processCB->timerIdMap.bitMap = NULL;
}
#endif
#ifdef LOSCFG_KERNEL_LITEIPC
if (OsProcessIsUserMode(processCB)) {
LiteIpcPoolDelete(&(processCB->ipcInfo));
(VOID)memset_s(&(processCB->ipcInfo), sizeof(ProcIpcInfo), 0, sizeof(ProcIpcInfo));
}
#endif
}
LITE_OS_SEC_TEXT STATIC VOID OsRecycleZombiesProcess(LosProcessCB *childCB, ProcessGroup **group)
{
OsExitProcessGroup(childCB, group);//退出进程组
LOS_ListDelete(&childCB->siblingList);//从父亲大人的子孙链表上摘除
if (childCB->processStatus & OS_PROCESS_STATUS_ZOMBIES) {
childCB->processStatus &= ~OS_PROCESS_STATUS_ZOMBIES;//去掉僵死标签
childCB->processStatus |= OS_PROCESS_FLAG_UNUSED;//贴上没使用标签，进程由进程池分配，进程退出后重新回到空闲进程池
}
LOS_ListDelete(&childCB->pendList);//将自己从阻塞链表上摘除
if (childCB->processStatus & OS_PROCESS_FLAG_EXIT) {
LOS_ListHeadInsert(&g_processRecycleList, &childCB->pendList);//从头部插入，注意g_processRecyleList挂的是pendList节点,所以要通过OS_PCB_FROM_PENDLIST找.
} else if (childCB->processStatus & OS_PROCESS_FLAG_GROUP_LEADER) {
LOS_ListTailInsert(&g_processRecycleList, &childCB->pendList);//从尾部插入
} else {
OsInsertPCBToFreeList(childCB);//直接插到freeList中去，可用于重新分配了。
}
}
/*! 当一个进程自然退出的时候,它的孩子进程由两位老祖宗收养 */
STATIC VOID OsDealAliveChildProcess(LosProcessCB *processCB)
{
UINT32 parentID;
LosProcessCB *childCB = NULL;
LosProcessCB *parentCB = NULL;
LOS_DL_LIST *nextList = NULL;
LOS_DL_LIST *childHead = NULL;
if (!LOS_ListEmpty(&processCB->childrenList)) {//如果存在孩子进程
childHead = processCB->childrenList.pstNext;//获取孩子链表
LOS_ListDelete(&(processCB->childrenList));//清空自己的孩子链表
if (OsProcessIsUserMode(processCB)) {//是用户态进程
parentID = g_userInitProcess;
} else {
parentID = g_kernelInitProcess;
}
for (nextList = childHead; ;) {//遍历孩子链表
childCB = OS_PCB_FROM_SIBLIST(nextList);//找到孩子的真身//找到孩子的真身
childCB->parentProcessID = parentID;
nextList = nextList->pstNext;//找下一个孩子进程
if (nextList == childHead) {//所以孩子都完成操作
break;
}
}
parentCB = OS_PCB_FROM_PID(parentID);
LOS_ListTailInsertList(&parentCB->childrenList, childHead);
}
return;
}
/*! 回收指定进程的已经退出的孩子进程所占资源 */
STATIC VOID OsChildProcessResourcesFree(const LosProcessCB *processCB)
{
LosProcessCB *childCB = NULL;
ProcessGroup *group = NULL;
while (!LOS_ListEmpty(&((LosProcessCB *)processCB)->exitChildList)) {//遍历直到没有了退出的孩子进程
childCB = LOS_DL_LIST_ENTRY(processCB->exitChildList.pstNext, LosProcessCB, siblingList);//获取孩子进程
OsRecycleZombiesProcess(childCB, &group);//其中会将childCB从exitChildList链表上摘出去
(VOID)LOS_MemFree(m_aucSysMem1, group);
}
}
STATIC VOID OsProcessNaturalExit(LosTaskCB *runTask, UINT32 status)
{
LosProcessCB *processCB = OS_PCB_FROM_PID(runTask->processID);//释放孩子进程的资源
LosProcessCB *parentCB = NULL;
LOS_ASSERT(processCB->processStatus & OS_PROCESS_STATUS_RUNNING);
OsChildProcessResourcesFree(processCB);
/* is a child process */
if (processCB->parentProcessID != OS_INVALID_VALUE) {
parentCB = OS_PCB_FROM_PID(processCB->parentProcessID);
LOS_ListDelete(&processCB->siblingList);
if (!OsProcessExitCodeSignalIsSet(processCB)) {
OsProcessExitCodeSet(processCB, status);
}
LOS_ListTailInsert(&parentCB->exitChildList, &processCB->siblingList);
LOS_ListDelete(&processCB->subordinateGroupList);
LOS_ListTailInsert(&processCB->group->exitProcessList, &processCB->subordinateGroupList);
OsWaitCheckAndWakeParentProcess(parentCB, processCB);
OsDealAliveChildProcess(processCB);
processCB->processStatus |= OS_PROCESS_STATUS_ZOMBIES;
#ifdef LOSCFG_KERNEL_VM
(VOID)OsKill(processCB->parentProcessID, SIGCHLD, OS_KERNEL_KILL_PERMISSION);
#endif
LOS_ListHeadInsert(&g_processRecycleList, &processCB->pendList);
OsRunTaskToDelete(runTask);
return;
}
LOS_Panic("pid : %u is the root process exit!\n", processCB->processID);
return;
}
/*! 进程模块初始化,被编译放在代码段 .init 中*/
STATIC UINT32 OsProcessInit(VOID)
{
UINT32 index;
UINT32 size;
g_processMaxNum = LOSCFG_BASE_CORE_PROCESS_LIMIT;//默认支持64个进程
size = g_processMaxNum * sizeof(LosProcessCB);
g_processCBArray = (LosProcessCB *)LOS_MemAlloc(m_aucSysMem1, size);// 进程池，占用内核堆,内存池分配
if (g_processCBArray == NULL) {
return LOS_NOK;
}
(VOID)memset_s(g_processCBArray, size, 0, size);//安全方式重置清0
LOS_ListInit(&g_freeProcess);//进程空闲链表初始化，创建一个进程时从g_freeProcess中申请一个进程描述符使用
LOS_ListInit(&g_processRecycleList);//进程回收链表初始化,回收完成后进入g_freeProcess等待再次被申请使用
for (index = 0; index < g_processMaxNum; index++) {//进程池循环创建
g_processCBArray[index].processID = index;//进程ID[0-g_processMaxNum-1]赋值
g_processCBArray[index].processStatus = OS_PROCESS_FLAG_UNUSED;
LOS_ListTailInsert(&g_freeProcess, &g_processCBArray[index].pendList);
}
g_kernelIdleProcess = 0; /* 0: The idle process ID of the kernel-mode process is fixed at 0 */
LOS_ListDelete(&OS_PCB_FROM_PID(g_kernelIdleProcess)->pendList);
g_userInitProcess = 1; /* 1: The root process ID of the user-mode process is fixed at 1 */
LOS_ListDelete(&OS_PCB_FROM_PID(g_userInitProcess)->pendList);
g_kernelInitProcess = 2; /* 2: The root process ID of the kernel-mode process is fixed at 2 */
LOS_ListDelete(&OS_PCB_FROM_PID(g_kernelInitProcess)->pendList);
return LOS_OK;
}
/*! 进程回收再利用过程*/
LITE_OS_SEC_TEXT VOID OsProcessCBRecycleToFree(VOID)
{
UINT32 intSave;
LosProcessCB *processCB = NULL;
SCHEDULER_LOCK(intSave);
while (!LOS_ListEmpty(&g_processRecycleList)) {//循环任务回收链表,直到为空
processCB = OS_PCB_FROM_PENDLIST(LOS_DL_LIST_FIRST(&g_processRecycleList));
if (!(processCB->processStatus & OS_PROCESS_FLAG_EXIT)) {//进程没有退出标签
break;
}
SCHEDULER_UNLOCK(intSave);
OsTaskCBRecycleToFree();
SCHEDULER_LOCK(intSave);
processCB->processStatus &= ~OS_PROCESS_FLAG_EXIT;
#ifdef LOSCFG_KERNEL_VM
LosVmSpace *space = NULL;
if (OsProcessIsUserMode(processCB)) {//进程是否是用户态进程
space = processCB->vmSpace;//只有用户态的进程才需要释放虚拟内存空间
}
processCB->vmSpace = NULL;
#endif
/* OS_PROCESS_FLAG_GROUP_LEADER: The lead process group cannot be recycled without destroying the PCB.
* !OS_PROCESS_FLAG_UNUSED: Parent process does not reclaim child process resources.
*/
LOS_ListDelete(&processCB->pendList);//将进程从进程链表上摘除
if ((processCB->processStatus & OS_PROCESS_FLAG_GROUP_LEADER) ||
(processCB->processStatus & OS_PROCESS_STATUS_ZOMBIES)) {
LOS_ListTailInsert(&g_processRecycleList, &processCB->pendList);//将进程挂到进程回收链表上,
} else {
/* Clear the bottom 4 bits of process status */
OsInsertPCBToFreeList(processCB);//进程回到可分配池中,再分配利用
}
SCHEDULER_UNLOCK(intSave);
#ifdef LOSCFG_KERNEL_VM
(VOID)LOS_VmSpaceFree(space);//释放用户态进程的虚拟内存空间,因为内核只有一个虚拟空间,因此不需要释放虚拟空间.
#endif
SCHEDULER_LOCK(intSave);
}
SCHEDULER_UNLOCK(intSave);
}
/*! 删除PCB块 其实是 PCB块回归进程池,先进入回收链表*/
STATIC VOID OsDeInitPCB(LosProcessCB *processCB)
{
UINT32 intSave;
ProcessGroup *group = NULL;
if (processCB == NULL) {
return;
}
OsProcessResourcesToFree(processCB);//释放进程所占用的资源
SCHEDULER_LOCK(intSave);
if (processCB->parentProcessID != OS_INVALID_VALUE) {
LOS_ListDelete(&processCB->siblingList);//将进程从兄弟链表中摘除
processCB->parentProcessID = OS_INVALID_VALUE;
}
if (processCB->group != NULL) {
OsExitProcessGroup(processCB, &group);
}
processCB->processStatus &= ~OS_PROCESS_STATUS_INIT;//设置进程状态为非初始化
processCB->processStatus |= OS_PROCESS_FLAG_EXIT;//设置进程状态为退出
LOS_ListHeadInsert(&g_processRecycleList, &processCB->pendList);
SCHEDULER_UNLOCK(intSave);
(VOID)LOS_MemFree(m_aucSysMem1, group);
OsWriteResourceEvent(OS_RESOURCE_EVENT_FREE);
return;
}
/*! 设置进程的名字*/
UINT32 OsSetProcessName(LosProcessCB *processCB, const CHAR *name)
{
errno_t errRet;
if (processCB == NULL) {
return LOS_EINVAL;
}
if (name != NULL) {
errRet = strncpy_s(processCB->processName, OS_PCB_NAME_LEN, name, OS_PCB_NAME_LEN - 1);
if (errRet == EOK) {
return LOS_OK;
}
}
switch (processCB->processMode) {
case OS_KERNEL_MODE:
errRet = snprintf_s(processCB->processName, OS_PCB_NAME_LEN, OS_PCB_NAME_LEN - 1,
"KerProcess%u", processCB->processID);
break;
default:
errRet = snprintf_s(processCB->processName, OS_PCB_NAME_LEN, OS_PCB_NAME_LEN - 1,
"UserProcess%u", processCB->processID);
break;
}
if (errRet < 0) {
return LOS_NOK;
}
return LOS_OK;
}
/*! 初始化PCB(进程控制块)*/
STATIC UINT32 OsInitPCB(LosProcessCB *processCB, UINT32 mode, UINT16 priority, const CHAR *name)
{
processCB->processMode = mode; //用户态进程还是内核态进程
processCB->processStatus = OS_PROCESS_STATUS_INIT; //进程初始状态
processCB->parentProcess = NULL;
processCB->threadGroup = NULL;
processCB->umask = OS_PROCESS_DEFAULT_UMASK; //掩码
processCB->timerID = (timer_t)(UINTPTR)MAX_INVALID_TIMER_VID;
LOS_ListInit(&processCB->threadSiblingList);//初始化孩子任务/线程链表，上面挂的都是由此fork的孩子线程 见于 OsTaskCBInit LOS_ListTailInsert(&(processCB->threadSiblingList), &(taskCB->threadList));
LOS_ListInit(&processCB->childrenList); //初始化孩子进程链表，上面挂的都是由此fork的孩子进程 见于 OsCopyParent LOS_ListTailInsert(&parentProcessCB->childrenList, &childProcessCB->siblingList);
LOS_ListInit(&processCB->exitChildList); //初始化记录退出孩子进程链表，上面挂的是哪些exit 见于 OsProcessNaturalExit LOS_ListTailInsert(&parentCB->exitChildList, &processCB->siblingList);
LOS_ListInit(&(processCB->waitList)); //初始化等待任务链表 上面挂的是处于等待的 见于 OsWaitInsertWaitLIstInOrder LOS_ListHeadInsert(&processCB->waitList, &runTask->pendList);
#ifdef LOSCFG_KERNEL_VM
if (OsProcessIsUserMode(processCB)) {//如果是用户态进程
processCB->vmSpace = OsCreateUserVmSpace();//创建用户空间
if (processCB->vmSpace == NULL) {
processCB->processStatus = OS_PROCESS_FLAG_UNUSED;
return LOS_ENOMEM;
}//在鸿蒙内核态进程只有kprocess 和 kidle 两个
} else {
processCB->vmSpace = LOS_GetKVmSpace();
}
#endif
#ifdef LOSCFG_SECURITY_VID
status_t status = VidMapListInit(processCB);
if (status != LOS_OK) {
return LOS_ENOMEM;
}
#endif
#ifdef LOSCFG_SECURITY_CAPABILITY
OsInitCapability(processCB);//初始化进程安全相关功能
#endif
if (OsSetProcessName(processCB, name) != LOS_OK) {
return LOS_ENOMEM;
}
return LOS_OK;
}
//创建用户
#ifdef LOSCFG_SECURITY_CAPABILITY
STATIC User *OsCreateUser(UINT32 userID, UINT32 gid, UINT32 size)//参数size 表示组数量
{ //(size - 1) * sizeof(UINT32) 用于 user->groups[..],这种设计节约了内存,不造成不需要的浪费
User *user = LOS_MemAlloc(m_aucSysMem1, sizeof(User) + (size - 1) * sizeof(UINT32));
if (user == NULL) {
return NULL;
}
user->userID = userID;
user->effUserID = userID;
user->gid = gid;
user->effGid = gid;
user->groupNumber = size;//用户组数量
user->groups[0] = gid; //用户组列表,一个用户可以属于多个用户组
return user;
}
/*! 检查参数群组ID是否在当前用户所属群组中*/
LITE_OS_SEC_TEXT BOOL LOS_CheckInGroups(UINT32 gid)
{
UINT32 intSave;
UINT32 count;
User *user = NULL;
SCHEDULER_LOCK(intSave);
user = OsCurrUserGet();//当前进程所属用户
for (count = 0; count < user->groupNumber; count++) {//循环对比
if (user->groups[count] == gid) {
SCHEDULER_UNLOCK(intSave);
return TRUE;
}
}
SCHEDULER_UNLOCK(intSave);
return FALSE;
}
#endif
/*! 获取当前进程的用户ID*/
LITE_OS_SEC_TEXT INT32 LOS_GetUserID(VOID)
{
#ifdef LOSCFG_SECURITY_CAPABILITY
UINT32 intSave;
INT32 uid;
SCHEDULER_LOCK(intSave);
uid = (INT32)OsCurrUserGet()->userID;
SCHEDULER_UNLOCK(intSave);
return uid;
#else
return 0;
#endif
}
/*! 获取当前进程的用户组ID*/
LITE_OS_SEC_TEXT INT32 LOS_GetGroupID(VOID)
{
#ifdef LOSCFG_SECURITY_CAPABILITY
UINT32 intSave;
INT32 gid;
SCHEDULER_LOCK(intSave);
gid = (INT32)OsCurrUserGet()->gid;
SCHEDULER_UNLOCK(intSave);
return gid;
#else
return 0;
#endif
}
/*! 进程创建初始化*/
STATIC UINT32 OsProcessCreateInit(LosProcessCB *processCB, UINT32 flags, const CHAR *name, UINT16 priority)
{
ProcessGroup *group = NULL;
UINT32 ret = OsInitPCB(processCB, flags, priority, name);
if (ret != LOS_OK) {
goto EXIT;
}
#ifdef LOSCFG_KERNEL_LITEIPC
if (OsProcessIsUserMode(processCB)) {
ret = LiteIpcPoolInit(&(processCB->ipcInfo));
if (ret != LOS_OK) {
ret = LOS_ENOMEM;
goto EXIT;
}
}
#endif
#ifdef LOSCFG_FS_VFS
processCB->files = alloc_files();
if (processCB->files == NULL) {
ret = LOS_ENOMEM;
goto EXIT;
}
#endif
group = OsCreateProcessGroup(processCB->processID);
if (group == NULL) {
ret = LOS_ENOMEM;
goto EXIT;
}
#ifdef LOSCFG_SECURITY_CAPABILITY
processCB->user = OsCreateUser(0, 0, 1);
if (processCB->user == NULL) {
ret = LOS_ENOMEM;
goto EXIT;
}
#endif
return LOS_OK;
EXIT:
OsDeInitPCB(processCB);
return ret;
}
/*! 创建2,0号进程,即内核态进程的老祖宗*/
LITE_OS_SEC_TEXT_INIT UINT32 OsSystemProcessCreate(VOID)
{
UINT32 ret = OsProcessInit();
if (ret != LOS_OK) {
return ret;
}
LosProcessCB *kerInitProcess = OS_PCB_FROM_PID(g_kernelInitProcess);
ret = OsProcessCreateInit(kerInitProcess, OS_KERNEL_MODE, "KProcess", 0);
if (ret != LOS_OK) {
return ret;
}
kerInitProcess->processStatus &= ~OS_PROCESS_STATUS_INIT;//去掉初始化标签
g_processGroup = kerInitProcess->group;
LOS_ListInit(&g_processGroup->groupList);
OsCurrProcessSet(kerInitProcess);
LosProcessCB *idleProcess = OS_PCB_FROM_PID(g_kernelIdleProcess);
ret = OsInitPCB(idleProcess, OS_KERNEL_MODE, OS_TASK_PRIORITY_LOWEST, "KIdle");//创建内核态0号进程
if (ret != LOS_OK) {
return ret;
}
idleProcess->parentProcessID = kerInitProcess->processID;
LOS_ListTailInsert(&kerInitProcess->childrenList, &idleProcess->siblingList);
idleProcess->group = kerInitProcess->group;
LOS_ListTailInsert(&kerInitProcess->group->processList, &idleProcess->subordinateGroupList);
#ifdef LOSCFG_SECURITY_CAPABILITY
idleProcess->user = kerInitProcess->user;
#endif
#ifdef LOSCFG_FS_VFS
idleProcess->files = kerInitProcess->files;
#endif
ret = OsIdleTaskCreate();
if (ret != LOS_OK) {
return ret;
}
idleProcess->threadGroupID = OsPercpuGet()->idleTaskID;
return LOS_OK;
}
/// 进程调度参数检查
STATIC INLINE INT32 OsProcessSchedlerParamCheck(INT32 which, INT32 pid, UINT16 prio, UINT16 policy)
{
if (OS_PID_CHECK_INVALID(pid)) {
return LOS_EINVAL;
}
if (which != LOS_PRIO_PROCESS) {
return LOS_EINVAL;
}
if (prio > OS_PROCESS_PRIORITY_LOWEST) {
return LOS_EINVAL;
}
if (policy != LOS_SCHED_RR) {
return LOS_EINVAL;
}
return LOS_OK;
}
#ifdef LOSCFG_SECURITY_CAPABILITY
STATIC BOOL OsProcessCapPermitCheck(const LosProcessCB *processCB, UINT16 prio)
{
LosProcessCB *runProcess = OsCurrProcessGet();
/* always trust kernel process */
if (!OsProcessIsUserMode(runProcess)) {
return TRUE;
}
/* user mode process can reduce the priority of itself */
if ((runProcess->processID == processCB->processID) && (prio > processCB->priority)) {
return TRUE;
}
/* user mode process with privilege of CAP_SCHED_SETPRIORITY can change the priority */
if (IsCapPermit(CAP_SCHED_SETPRIORITY)) {
return TRUE;
}
return FALSE;
}
#endif
LITE_OS_SEC_TEXT INT32 OsSetProcessScheduler(INT32 which, INT32 pid, UINT16 prio, UINT16 policy)
{
LosProcessCB *processCB = NULL;
BOOL needSched = FALSE;
UINT32 intSave;
INT32 ret;
ret = OsProcessSchedlerParamCheck(which, pid, prio, policy);
if (ret != LOS_OK) {
return -ret;
}
SCHEDULER_LOCK(intSave);
processCB = OS_PCB_FROM_PID(pid);
if (OsProcessIsInactive(processCB)) {
ret = LOS_ESRCH;
goto EXIT;
}
#ifdef LOSCFG_SECURITY_CAPABILITY
if (!OsProcessCapPermitCheck(processCB, prio)) {
ret = LOS_EPERM;
goto EXIT;
}
#endif
needSched = OsSchedModifyProcessSchedParam(processCB, policy, prio);
SCHEDULER_UNLOCK(intSave);
LOS_MpSchedule(OS_MP_CPU_ALL);
if (needSched && OS_SCHEDULER_ACTIVE) {
LOS_Schedule();
}
return LOS_OK;
EXIT:
SCHEDULER_UNLOCK(intSave);
return -ret;
}
LITE_OS_SEC_TEXT INT32 LOS_SetProcessScheduler(INT32 pid, UINT16 policy, UINT16 prio)
{
return OsSetProcessScheduler(LOS_PRIO_PROCESS, pid, prio, policy);
}
LITE_OS_SEC_TEXT INT32 LOS_GetProcessScheduler(INT32 pid)
{
UINT32 intSave;
if (OS_PID_CHECK_INVALID(pid)) {
return -LOS_EINVAL;
}
SCHEDULER_LOCK(intSave);
LosProcessCB *processCB = OS_PCB_FROM_PID(pid);
if (OsProcessIsUnused(processCB)) {
SCHEDULER_UNLOCK(intSave);
return -LOS_ESRCH;
}
SCHEDULER_UNLOCK(intSave);
return LOS_SCHED_RR;
}
LITE_OS_SEC_TEXT INT32 LOS_SetProcessPriority(INT32 pid, UINT16 prio)
{
return OsSetProcessScheduler(LOS_PRIO_PROCESS, pid, prio, LOS_GetProcessScheduler(pid));
}
LITE_OS_SEC_TEXT INT32 OsGetProcessPriority(INT32 which, INT32 pid)
{
LosProcessCB *processCB = NULL;
INT32 prio;
UINT32 intSave;
(VOID)which;
if (OS_PID_CHECK_INVALID(pid)) {
return -LOS_EINVAL;
}
if (which != LOS_PRIO_PROCESS) {
return -LOS_EINVAL;
}
SCHEDULER_LOCK(intSave);
processCB = OS_PCB_FROM_PID(pid);
if (OsProcessIsUnused(processCB)) {
prio = -LOS_ESRCH;
goto OUT;
}
prio = (INT32)processCB->priority;
OUT:
SCHEDULER_UNLOCK(intSave);
return prio;
}
LITE_OS_SEC_TEXT INT32 LOS_GetProcessPriority(INT32 pid)
{
return OsGetProcessPriority(LOS_PRIO_PROCESS, pid);
}
STATIC VOID OsWaitInsertWaitListInOrder(LosTaskCB *runTask, LosProcessCB *processCB)
{
LOS_DL_LIST *head = &processCB->waitList;
LOS_DL_LIST *list = head;
LosTaskCB *taskCB = NULL;
if (runTask->waitFlag == OS_PROCESS_WAIT_GID) {
while (list->pstNext != head) {
taskCB = OS_TCB_FROM_PENDLIST(LOS_DL_LIST_FIRST(list));
if (taskCB->waitFlag == OS_PROCESS_WAIT_PRO) {
list = list->pstNext;
continue;
}
break;
}
} else if (runTask->waitFlag == OS_PROCESS_WAIT_ANY) {
while (list->pstNext != head) {
taskCB = OS_TCB_FROM_PENDLIST(LOS_DL_LIST_FIRST(list));
if (taskCB->waitFlag != OS_PROCESS_WAIT_ANY) {
list = list->pstNext;
continue;
}
break;
}
}
/* if runTask->waitFlag == OS_PROCESS_WAIT_PRO,
* this node is inserted directly into the header of the waitList
*/
(VOID)OsSchedTaskWait(list->pstNext, LOS_WAIT_FOREVER, TRUE);
return;
}
STATIC UINT32 OsWaitSetFlag(const LosProcessCB *processCB, INT32 pid, LosProcessCB **child)
{
LosProcessCB *childCB = NULL;
ProcessGroup *group = NULL;
LosTaskCB *runTask = OsCurrTaskGet();
UINT32 ret;
if (pid > 0) {
/* Wait for the child process whose process number is pid. */
childCB = OsFindExitChildProcess(processCB, pid);
if (childCB != NULL) {
goto WAIT_BACK;
}
ret = OsFindChildProcess(processCB, pid);
if (ret != LOS_OK) {
return LOS_ECHILD;
}
runTask->waitFlag = OS_PROCESS_WAIT_PRO;
runTask->waitID = pid;
} else if (pid == 0) {
/* Wait for any child process in the same process group */
childCB = OsFindGroupExitProcess(processCB->group, OS_INVALID_VALUE);
if (childCB != NULL) {
goto WAIT_BACK;
}
runTask->waitID = processCB->group->groupID;
runTask->waitFlag = OS_PROCESS_WAIT_GID;
} else if (pid == -1) {
/* Wait for any child process */
childCB = OsFindExitChildProcess(processCB, OS_INVALID_VALUE);
if (childCB != NULL) {
goto WAIT_BACK;
}
runTask->waitID = pid;
runTask->waitFlag = OS_PROCESS_WAIT_ANY;
} else { /* pid < -1 */
/* Wait for any child process whose group number is the pid absolute value. */
group = OsFindProcessGroup(-pid);
if (group == NULL) {
return LOS_ECHILD;
}
childCB = OsFindGroupExitProcess(group, OS_INVALID_VALUE);
if (childCB != NULL) {
goto WAIT_BACK;
}
runTask->waitID = -pid;
runTask->waitFlag = OS_PROCESS_WAIT_GID;
}
WAIT_BACK:
*child = childCB;
return LOS_OK;
}
STATIC UINT32 OsWaitRecycleChildProcess(const LosProcessCB *childCB, UINT32 intSave, INT32 *status, siginfo_t *info)
{
ProcessGroup *group = NULL;
UINT32 pid = childCB->processID;
UINT16 mode = childCB->processMode;
INT32 exitCode = childCB->exitCode;
UINT32 uid = 0;
#ifdef LOSCFG_SECURITY_CAPABILITY
if (childCB->user != NULL) {
uid = childCB->user->userID;
}
#endif
OsRecycleZombiesProcess((LosProcessCB *)childCB, &group);
SCHEDULER_UNLOCK(intSave);
if (status != NULL) {
if (mode == OS_USER_MODE) {
(VOID)LOS_ArchCopyToUser((VOID *)status, (const VOID *)(&(exitCode)), sizeof(INT32));
} else {
*status = exitCode;
}
}
/* get signal info */
if (info != NULL) {
siginfo_t tempinfo = { 0 };
tempinfo.si_signo = SIGCHLD;
tempinfo.si_errno = 0;
tempinfo.si_pid = pid;
tempinfo.si_uid = uid;
/*
* Process exit code
* 31 15 8 7 0
* | | exit code | core dump | signal |
*/
if ((exitCode & 0x7f) == 0) {
tempinfo.si_code = CLD_EXITED;
tempinfo.si_status = (exitCode >> 8U);
} else {
tempinfo.si_code = (exitCode & 0x80) ? CLD_DUMPED : CLD_KILLED;
tempinfo.si_status = (exitCode & 0x7f);
}
if (mode == OS_USER_MODE) {
(VOID)LOS_ArchCopyToUser((VOID *)(info), (const VOID *)(&(tempinfo)), sizeof(siginfo_t));
} else {
(VOID)memcpy_s((VOID *)(info), sizeof(siginfo_t), (const VOID *)(&(tempinfo)), sizeof(siginfo_t));
}
}
(VOID)LOS_MemFree(m_aucSysMem1, group);
return pid;
}
STATIC UINT32 OsWaitChildProcessCheck(LosProcessCB *processCB, INT32 pid, LosProcessCB **childCB)
{
if (LOS_ListEmpty(&(processCB->childrenList)) && LOS_ListEmpty(&(processCB->exitChildList))) {
return LOS_ECHILD;
}
return OsWaitSetFlag(processCB, pid, childCB);
}
STATIC UINT32 OsWaitOptionsCheck(UINT32 options)
{
UINT32 flag = LOS_WAIT_WNOHANG | LOS_WAIT_WUNTRACED | LOS_WAIT_WCONTINUED;
flag = ~flag & options;
if (flag != 0) {
return LOS_EINVAL;
}
if ((options & (LOS_WAIT_WCONTINUED | LOS_WAIT_WUNTRACED)) != 0) {
return LOS_EOPNOTSUPP;
}
if (OS_INT_ACTIVE) {
return LOS_EINTR;
}
return LOS_OK;
}
STATIC INT32 OsWait(INT32 pid, USER INT32 *status, USER siginfo_t *info, UINT32 options, VOID *rusage)
{
(VOID)rusage;
UINT32 ret;
UINT32 intSave;
LosProcessCB *childCB = NULL;
LosProcessCB *processCB = NULL;
LosTaskCB *runTask = NULL;
SCHEDULER_LOCK(intSave);
processCB = OsCurrProcessGet();
runTask = OsCurrTaskGet();
ret = OsWaitChildProcessCheck(processCB, pid, &childCB);
if (ret != LOS_OK) {
pid = -ret;
goto ERROR;
}
if (childCB != NULL) {
return (INT32)OsWaitRecycleChildProcess(childCB, intSave, status, info);
}
if ((options & LOS_WAIT_WNOHANG) != 0) {
runTask->waitFlag = 0;
pid = 0;
goto ERROR;
}
OsWaitInsertWaitListInOrder(runTask, processCB);
runTask->waitFlag = 0;
if (runTask->waitID == OS_INVALID_VALUE) {
pid = -LOS_ECHILD;
goto ERROR;
}
childCB = OS_PCB_FROM_PID(runTask->waitID);
if (!(childCB->processStatus & OS_PROCESS_STATUS_ZOMBIES)) {
pid = -LOS_ESRCH;
goto ERROR;
}
return (INT32)OsWaitRecycleChildProcess(childCB, intSave, status, info);
ERROR:
SCHEDULER_UNLOCK(intSave);
return pid;
}
LITE_OS_SEC_TEXT INT32 LOS_Wait(INT32 pid, USER INT32 *status, UINT32 options, VOID *rusage)
{
(VOID)rusage;
UINT32 ret;
ret = OsWaitOptionsCheck(options);
if (ret != LOS_OK) {
return -ret;
}
return OsWait(pid, status, NULL, options, NULL);
}
STATIC UINT32 OsWaitidOptionsCheck(UINT32 options)
{
UINT32 flag = LOS_WAIT_WNOHANG | LOS_WAIT_WSTOPPED | LOS_WAIT_WCONTINUED | LOS_WAIT_WEXITED | LOS_WAIT_WNOWAIT;
flag = ~flag & options;
if ((flag != 0) || (options == 0)) {
return LOS_EINVAL;
}
/*
* only support LOS_WAIT_WNOHANG | LOS_WAIT_WEXITED
* notsupport LOS_WAIT_WSTOPPED | LOS_WAIT_WCONTINUED | LOS_WAIT_WNOWAIT
*/
if ((options & (LOS_WAIT_WSTOPPED | LOS_WAIT_WCONTINUED | LOS_WAIT_WNOWAIT)) != 0) {
return LOS_EOPNOTSUPP;
}
if (OS_INT_ACTIVE) {
return LOS_EINTR;
}
return LOS_OK;
}
LITE_OS_SEC_TEXT INT32 LOS_Waitid(INT32 pid, USER siginfo_t *info, UINT32 options, VOID *rusage)
{
(VOID)rusage;
UINT32 ret;
/* check options value */
ret = OsWaitidOptionsCheck(options);
if (ret != LOS_OK) {
return -ret;
}
return OsWait(pid, NULL, info, options, NULL);
}
STATIC UINT32 OsSetProcessGroupCheck(const LosProcessCB *processCB, UINT32 gid)
{
LosProcessCB *runProcessCB = OsCurrProcessGet();
LosProcessCB *groupProcessCB = OS_PCB_FROM_PID(gid);
if (OsProcessIsInactive(processCB)) {
return LOS_ESRCH;
}
if (!OsProcessIsUserMode(processCB) || !OsProcessIsUserMode(groupProcessCB)) {
return LOS_EPERM;
}
if (runProcessCB->processID == processCB->parentProcessID) {
if (processCB->processStatus & OS_PROCESS_FLAG_ALREADY_EXEC) {
return LOS_EACCES;
}
} else if (processCB->processID != runProcessCB->processID) {
return LOS_ESRCH;
}
/* Add the process to another existing process group */
if (processCB->processID != gid) {
if (!(groupProcessCB->processStatus & OS_PROCESS_FLAG_GROUP_LEADER)) {
return LOS_EPERM;
}
if ((groupProcessCB->parentProcessID != processCB->parentProcessID) && (gid != processCB->parentProcessID)) {
return LOS_EPERM;
}
}
return LOS_OK;
}
STATIC UINT32 OsSetProcessGroupIDUnsafe(UINT32 pid, UINT32 gid, ProcessGroup **group)
{
ProcessGroup *oldGroup = NULL;
ProcessGroup *newGroup = NULL;
LosProcessCB *processCB = OS_PCB_FROM_PID(pid);
UINT32 ret = OsSetProcessGroupCheck(processCB, gid);
if (ret != LOS_OK) {
return ret;
}
if (processCB->group->groupID == gid) {
return LOS_OK;
}
oldGroup = processCB->group;
OsExitProcessGroup(processCB, group);
newGroup = OsFindProcessGroup(gid);
if (newGroup != NULL) {
LOS_ListTailInsert(&newGroup->processList, &processCB->subordinateGroupList);
processCB->group = newGroup;
return LOS_OK;
}
newGroup = OsCreateProcessGroup(gid);
if (newGroup == NULL) {
LOS_ListTailInsert(&oldGroup->processList, &processCB->subordinateGroupList);
processCB->group = oldGroup;
if (*group != NULL) {
LOS_ListTailInsert(&g_processGroup->groupList, &oldGroup->groupList);
processCB = OS_PCB_FROM_PID(oldGroup->groupID);
processCB->processStatus |= OS_PROCESS_FLAG_GROUP_LEADER;
*group = NULL;
}
return LOS_EPERM;
}
return LOS_OK;
}
LITE_OS_SEC_TEXT INT32 OsSetProcessGroupID(UINT32 pid, UINT32 gid)
{
ProcessGroup *group = NULL;
UINT32 ret;
UINT32 intSave;
if ((OS_PID_CHECK_INVALID(pid)) || (OS_PID_CHECK_INVALID(gid))) {
return -LOS_EINVAL;
}
SCHEDULER_LOCK(intSave);
ret = OsSetProcessGroupIDUnsafe(pid, gid, &group);
SCHEDULER_UNLOCK(intSave);
(VOID)LOS_MemFree(m_aucSysMem1, group);
return -ret;
}
LITE_OS_SEC_TEXT INT32 OsSetCurrProcessGroupID(UINT32 gid)
{
return OsSetProcessGroupID(OsCurrProcessGet()->processID, gid);
}
LITE_OS_SEC_TEXT INT32 LOS_GetProcessGroupID(UINT32 pid)
{
INT32 gid;
UINT32 intSave;
LosProcessCB *processCB = NULL;
if (OS_PID_CHECK_INVALID(pid)) {
return -LOS_EINVAL;
}
SCHEDULER_LOCK(intSave);
processCB = OS_PCB_FROM_PID(pid);
if (OsProcessIsUnused(processCB)) {
gid = -LOS_ESRCH;
goto EXIT;
}
gid = (INT32)processCB->group->groupID;
EXIT:
SCHEDULER_UNLOCK(intSave);
return gid;
}
LITE_OS_SEC_TEXT INT32 LOS_GetCurrProcessGroupID(VOID)
{
return LOS_GetProcessGroupID(OsCurrProcessGet()->processID);
}
#ifdef LOSCFG_KERNEL_VM
STATIC LosProcessCB *OsGetFreePCB(VOID)
{
LosProcessCB *processCB = NULL;
UINT32 intSave;
SCHEDULER_LOCK(intSave);
if (LOS_ListEmpty(&g_freeProcess)) {
SCHEDULER_UNLOCK(intSave);
PRINT_ERR("No idle PCB in the system!\n");
return NULL;
}
processCB = OS_PCB_FROM_PENDLIST(LOS_DL_LIST_FIRST(&g_freeProcess));
LOS_ListDelete(&processCB->pendList);
SCHEDULER_UNLOCK(intSave);
return processCB;
}
STATIC VOID *OsUserInitStackAlloc(LosProcessCB *processCB, UINT32 *size)
{
LosVmMapRegion *region = NULL;
UINT32 stackSize = ALIGN(OS_USER_TASK_STACK_SIZE, PAGE_SIZE);
region = LOS_RegionAlloc(processCB->vmSpace, 0, stackSize,
VM_MAP_REGION_FLAG_PERM_USER | VM_MAP_REGION_FLAG_PERM_READ |
VM_MAP_REGION_FLAG_PERM_WRITE, 0);
if (region == NULL) {
return NULL;
}
LOS_SetRegionTypeAnon(region);
region->regionFlags |= VM_MAP_REGION_FLAG_STACK;
*size = stackSize;
return (VOID *)(UINTPTR)region->range.base;
}
LITE_OS_SEC_TEXT UINT32 OsExecRecycleAndInit(LosProcessCB *processCB, const CHAR *name,
LosVmSpace *oldSpace, UINTPTR oldFiles)
{
UINT32 ret;
const CHAR *processName = NULL;
if ((processCB == NULL) || (name == NULL)) {
return LOS_NOK;
}
processName = strrchr(name, '/');
processName = (processName == NULL) ? name : (processName + 1); /* 1: Do not include '/' */
ret = (UINT32)OsSetTaskName(OsCurrTaskGet(), processName, TRUE);
if (ret != LOS_OK) {
return ret;
}
#ifdef LOSCFG_KERNEL_LITEIPC
ret = LiteIpcPoolInit(&(processCB->ipcInfo));
if (ret != LOS_OK) {
return LOS_NOK;
}
#endif
processCB->sigHandler = 0;
OsCurrTaskGet()->sig.sigprocmask = 0;
LOS_VmSpaceFree(oldSpace);
#ifdef LOSCFG_FS_VFS
CloseOnExec((struct files_struct *)oldFiles);
delete_files_snapshot((struct files_struct *)oldFiles);
#endif
OsSwtmrRecycle(processCB->processID);
processCB->timerID = (timer_t)(UINTPTR)MAX_INVALID_TIMER_VID;
#ifdef LOSCFG_SECURITY_VID
VidMapDestroy(processCB);
ret = VidMapListInit(processCB);
if (ret != LOS_OK) {
return LOS_NOK;
}
#endif
processCB->processStatus &= ~OS_PROCESS_FLAG_EXIT;
processCB->processStatus |= OS_PROCESS_FLAG_ALREADY_EXEC;
return LOS_OK;
}
LITE_OS_SEC_TEXT UINT32 OsExecStart(const TSK_ENTRY_FUNC entry, UINTPTR sp, UINTPTR mapBase, UINT32 mapSize)
{
UINT32 intSave;
if (entry == NULL) {
return LOS_NOK;
}
if ((sp == 0) || (LOS_Align(sp, LOSCFG_STACK_POINT_ALIGN_SIZE) != sp)) {
return LOS_NOK;
}
if ((mapBase == 0) || (mapSize == 0) || (sp <= mapBase) || (sp > (mapBase + mapSize))) {
return LOS_NOK;
}
LosTaskCB *taskCB = OsCurrTaskGet();
SCHEDULER_LOCK(intSave);
taskCB->userMapBase = mapBase;
taskCB->userMapSize = mapSize;
taskCB->taskEntry = (TSK_ENTRY_FUNC)entry;
TaskContext *taskContext = (TaskContext *)OsTaskStackInit(taskCB->taskID, taskCB->stackSize,
(VOID *)taskCB->topOfStack, FALSE);
OsUserTaskStackInit(taskContext, (UINTPTR)taskCB->taskEntry, sp);
SCHEDULER_UNLOCK(intSave);
return LOS_OK;
}
STATIC UINT32 OsUserInitProcessStart(UINT32 processID, TSK_INIT_PARAM_S *param)
{
UINT32 intSave;
UINT32 taskID;
INT32 ret;
taskID = OsCreateUserTask(processID, param);
if (taskID == OS_INVALID_VALUE) {
return LOS_NOK;
}
ret = LOS_SetTaskScheduler(taskID, LOS_SCHED_RR, OS_TASK_PRIORITY_LOWEST);
if (ret != LOS_OK) {
PRINT_ERR("User init process set scheduler failed! ERROR:%d \n", ret);
SCHEDULER_LOCK(intSave);
(VOID)OsTaskDeleteUnsafe(OS_TCB_FROM_TID(taskID), OS_PRO_EXIT_OK, intSave);
return LOS_NOK;
}
return LOS_OK;
}
STATIC UINT32 OsLoadUserInit(LosProcessCB *processCB)
{
/* userInitTextStart -----
* | user text |
*
* | user data | initSize
* userInitBssStart ---
* | user bss | initBssSize
* userInitEnd --- -----
*/
errno_t errRet;
INT32 ret;
CHAR *userInitTextStart = (CHAR *)&__user_init_entry;
CHAR *userInitBssStart = (CHAR *)&__user_init_bss;
CHAR *userInitEnd = (CHAR *)&__user_init_end;
UINT32 initBssSize = userInitEnd - userInitBssStart;
UINT32 initSize = userInitEnd - userInitTextStart;
VOID *userBss = NULL;
VOID *userText = NULL;
if ((LOS_Align((UINTPTR)userInitTextStart, PAGE_SIZE) != (UINTPTR)userInitTextStart) ||
(LOS_Align((UINTPTR)userInitEnd, PAGE_SIZE) != (UINTPTR)userInitEnd)) {
return LOS_EINVAL;
}
if ((initSize == 0) || (initSize <= initBssSize)) {
return LOS_EINVAL;
}
userText = LOS_PhysPagesAllocContiguous(initSize >> PAGE_SHIFT);
if (userText == NULL) {
return LOS_NOK;
}
errRet = memcpy_s(userText, initSize, (VOID *)&__user_init_load_addr, initSize - initBssSize);
if (errRet != EOK) {
PRINT_ERR("Load user init text, data and bss failed! err : %d\n", errRet);
goto ERROR;
}
ret = LOS_VaddrToPaddrMmap(processCB->vmSpace, (VADDR_T)(UINTPTR)userInitTextStart, LOS_PaddrQuery(userText),
initSize, VM_MAP_REGION_FLAG_PERM_READ | VM_MAP_REGION_FLAG_PERM_WRITE |
VM_MAP_REGION_FLAG_FIXED | VM_MAP_REGION_FLAG_PERM_EXECUTE |
VM_MAP_REGION_FLAG_PERM_USER);
if (ret < 0) {
PRINT_ERR("Mmap user init text, data and bss failed! err : %d\n", ret);
goto ERROR;
}
/* The User init boot segment may not actually exist */
if (initBssSize != 0) {
userBss = (VOID *)((UINTPTR)userText + userInitBssStart - userInitTextStart);
errRet = memset_s(userBss, initBssSize, 0, initBssSize);
if (errRet != EOK) {
PRINT_ERR("memset user init bss failed! err : %d\n", errRet);
goto ERROR;
}
}
return LOS_OK;
ERROR:
(VOID)LOS_PhysPagesFreeContiguous(userText, initSize >> PAGE_SHIFT);
return LOS_NOK;
}
LITE_OS_SEC_TEXT_INIT UINT32 OsUserInitProcess(VOID)
{
UINT32 ret;
UINT32 size;
TSK_INIT_PARAM_S param = { 0 };
VOID *stack = NULL;
LosProcessCB *processCB = OS_PCB_FROM_PID(g_userInitProcess);
ret = OsProcessCreateInit(processCB, OS_USER_MODE, "Init", OS_PROCESS_USERINIT_PRIORITY);
if (ret != LOS_OK) {
return ret;
}
ret = OsLoadUserInit(processCB);
if (ret != LOS_OK) {
goto ERROR;
}
stack = OsUserInitStackAlloc(processCB, &size);
if (stack == NULL) {
PRINT_ERR("Alloc user init process user stack failed!\n");
goto ERROR;
}
param.pfnTaskEntry = (TSK_ENTRY_FUNC)(CHAR *)&__user_init_entry;
param.userParam.userSP = (UINTPTR)stack + size;
param.userParam.userMapBase = (UINTPTR)stack;
param.userParam.userMapSize = size;
param.uwResved = OS_TASK_FLAG_PTHREAD_JOIN;
ret = OsUserInitProcessStart(g_userInitProcess, ¶m);
if (ret != LOS_OK) {
(VOID)OsUnMMap(processCB->vmSpace, param.userParam.userMapBase, param.userParam.userMapSize);
goto ERROR;
}
return LOS_OK;
ERROR:
OsDeInitPCB(processCB);
return ret;
}
STATIC UINT32 OsCopyUser(LosProcessCB *childCB, LosProcessCB *parentCB)
{
#ifdef LOSCFG_SECURITY_CAPABILITY
UINT32 size = sizeof(User) + sizeof(UINT32) * (parentCB->user->groupNumber - 1);
childCB->user = LOS_MemAlloc(m_aucSysMem1, size);
if (childCB->user == NULL) {
return LOS_ENOMEM;
}
(VOID)memcpy_s(childCB->user, size, parentCB->user, size);
#endif
return LOS_OK;
}
STATIC VOID OsInitCopyTaskParam(LosProcessCB *childProcessCB, const CHAR *name, UINTPTR entry, UINT32 size,
TSK_INIT_PARAM_S *childPara)
{
LosTaskCB *mainThread = NULL;
UINT32 intSave;
SCHEDULER_LOCK(intSave);
mainThread = OsCurrTaskGet();
if (OsProcessIsUserMode(childProcessCB)) {
childPara->pfnTaskEntry = mainThread->taskEntry;
childPara->uwStackSize = mainThread->stackSize;
childPara->userParam.userArea = mainThread->userArea;
childPara->userParam.userMapBase = mainThread->userMapBase;
childPara->userParam.userMapSize = mainThread->userMapSize;
} else {
childPara->pfnTaskEntry = (TSK_ENTRY_FUNC)entry;
childPara->uwStackSize = size;
}
childPara->pcName = (CHAR *)name;
childPara->policy = mainThread->policy;
childPara->usTaskPrio = mainThread->priority;
childPara->processID = childProcessCB->processID;
if (mainThread->taskStatus & OS_TASK_FLAG_PTHREAD_JOIN) {
childPara->uwResved = OS_TASK_FLAG_PTHREAD_JOIN;
} else if (mainThread->taskStatus & OS_TASK_FLAG_DETACHED) {
childPara->uwResved = OS_TASK_FLAG_DETACHED;
}
SCHEDULER_UNLOCK(intSave);
}
STATIC UINT32 OsCopyTask(UINT32 flags, LosProcessCB *childProcessCB, const CHAR *name, UINTPTR entry, UINT32 size)
{
LosTaskCB *runTask = OsCurrTaskGet();
TSK_INIT_PARAM_S childPara = { 0 };
UINT32 ret;
UINT32 intSave;
UINT32 taskID;
OsInitCopyTaskParam(childProcessCB, name, entry, size, &childPara);
ret = LOS_TaskCreateOnly(&taskID, &childPara);
if (ret != LOS_OK) {
if (ret == LOS_ERRNO_TSK_TCB_UNAVAILABLE) {
return LOS_EAGAIN;
}
return LOS_ENOMEM;
}
LosTaskCB *childTaskCB = OS_TCB_FROM_TID(taskID);
childTaskCB->taskStatus = runTask->taskStatus;
if (childTaskCB->taskStatus & OS_TASK_STATUS_RUNNING) {
childTaskCB->taskStatus &= ~OS_TASK_STATUS_RUNNING;
} else {
if (OS_SCHEDULER_ACTIVE) {
LOS_Panic("Clone thread status not running error status: 0x%x\n", childTaskCB->taskStatus);
}
childTaskCB->taskStatus &= ~OS_TASK_STATUS_UNUSED;
childProcessCB->priority = OS_PROCESS_PRIORITY_LOWEST;
}
if (OsProcessIsUserMode(childProcessCB)) {
SCHEDULER_LOCK(intSave);
OsUserCloneParentStack(childTaskCB->stackPointer, runTask->topOfStack, runTask->stackSize);
SCHEDULER_UNLOCK(intSave);
}
return LOS_OK;
}
STATIC UINT32 OsCopyParent(UINT32 flags, LosProcessCB *childProcessCB, LosProcessCB *runProcessCB)
{
UINT32 ret;
UINT32 intSave;
LosProcessCB *parentProcessCB = NULL;
SCHEDULER_LOCK(intSave);
childProcessCB->priority = runProcessCB->priority;
if (flags & CLONE_PARENT) {
parentProcessCB = OS_PCB_FROM_PID(runProcessCB->parentProcessID);
} else {
parentProcessCB = runProcessCB;
}
childProcessCB->parentProcessID = parentProcessCB->processID;
LOS_ListTailInsert(&parentProcessCB->childrenList, &childProcessCB->siblingList);
childProcessCB->group = parentProcessCB->group;
LOS_ListTailInsert(&parentProcessCB->group->processList, &childProcessCB->subordinateGroupList);
ret = OsCopyUser(childProcessCB, parentProcessCB);
SCHEDULER_UNLOCK(intSave);
return ret;
}
STATIC UINT32 OsCopyMM(UINT32 flags, LosProcessCB *childProcessCB, LosProcessCB *runProcessCB)
{
status_t status;
UINT32 intSave;
if (!OsProcessIsUserMode(childProcessCB)) {
return LOS_OK;
}
if (flags & CLONE_VM) {
SCHEDULER_LOCK(intSave);
childProcessCB->vmSpace->archMmu.virtTtb = runProcessCB->vmSpace->archMmu.virtTtb;
childProcessCB->vmSpace->archMmu.physTtb = runProcessCB->vmSpace->archMmu.physTtb;
SCHEDULER_UNLOCK(intSave);
return LOS_OK;
}
status = LOS_VmSpaceClone(runProcessCB->vmSpace, childProcessCB->vmSpace);
if (status != LOS_OK) {
return LOS_ENOMEM;
}
return LOS_OK;
}
STATIC UINT32 OsCopyFile(UINT32 flags, LosProcessCB *childProcessCB, LosProcessCB *runProcessCB)
{
#ifdef LOSCFG_FS_VFS
if (flags & CLONE_FILES) {
childProcessCB->files = runProcessCB->files;
} else {
childProcessCB->files = dup_fd(runProcessCB->files);
}
if (childProcessCB->files == NULL) {
return LOS_ENOMEM;
}
#endif
childProcessCB->consoleID = runProcessCB->consoleID;
childProcessCB->umask = runProcessCB->umask;
return LOS_OK;
}
STATIC UINT32 OsForkInitPCB(UINT32 flags, LosProcessCB *child, const CHAR *name, UINTPTR sp, UINT32 size)
{
UINT32 ret;
LosProcessCB *run = OsCurrProcessGet();
ret = OsInitPCB(child, run->processMode, OS_PROCESS_PRIORITY_LOWEST, name);
if (ret != LOS_OK) {
return ret;
}
ret = OsCopyParent(flags, child, run);
if (ret != LOS_OK) {
return ret;
}
return OsCopyTask(flags, child, name, sp, size);
}
STATIC UINT32 OsChildSetProcessGroupAndSched(LosProcessCB *child, LosProcessCB *run)
{
UINT32 intSave;
UINT32 ret;
ProcessGroup *group = NULL;
SCHEDULER_LOCK(intSave);
if (run->group->groupID == OS_USER_PRIVILEGE_PROCESS_GROUP) {
ret = OsSetProcessGroupIDUnsafe(child->processID, child->processID, &group);
if (ret != LOS_OK) {
SCHEDULER_UNLOCK(intSave);
return LOS_ENOMEM;
}
}
OsSchedTaskEnQueue(OS_TCB_FROM_TID(child->threadGroupID));
SCHEDULER_UNLOCK(intSave);
(VOID)LOS_MemFree(m_aucSysMem1, group);
return LOS_OK;
}
STATIC UINT32 OsCopyProcessResources(UINT32 flags, LosProcessCB *child, LosProcessCB *run)
{
UINT32 ret;
ret = OsCopyMM(flags, child, run);
if (ret != LOS_OK) {
return ret;
}
ret = OsCopyFile(flags, child, run);
if (ret != LOS_OK) {
return ret;
}
#ifdef LOSCFG_KERNEL_LITEIPC
if (OsProcessIsUserMode(child)) {
ret = LiteIpcPoolReInit(&child->ipcInfo, (const ProcIpcInfo *)(&run->ipcInfo));
if (ret != LOS_OK) {
return LOS_ENOMEM;
}
}
#endif
#ifdef LOSCFG_SECURITY_CAPABILITY
OsCopyCapability(run, child);
#endif
return LOS_OK;
}
STATIC INT32 OsCopyProcess(UINT32 flags, const CHAR *name, UINTPTR sp, UINT32 size)
{
UINT32 intSave, ret, processID;
LosProcessCB *run = OsCurrProcessGet();
LosProcessCB *child = OsGetFreePCB();
if (child == NULL) {
return -LOS_EAGAIN;
}
processID = child->processID;
ret = OsForkInitPCB(flags, child, name, sp, size);
if (ret != LOS_OK) {
goto ERROR_INIT;
}
ret = OsCopyProcessResources(flags, child, run);
if (ret != LOS_OK) {
goto ERROR_TASK;
}
ret = OsChildSetProcessGroupAndSched(child, run);
if (ret != LOS_OK) {
goto ERROR_TASK;
}
LOS_MpSchedule(OS_MP_CPU_ALL);
if (OS_SCHEDULER_ACTIVE) {
LOS_Schedule();
}
return processID;
ERROR_TASK:
SCHEDULER_LOCK(intSave);
(VOID)OsTaskDeleteUnsafe(OS_TCB_FROM_TID(child->threadGroupID), OS_PRO_EXIT_OK, intSave);
ERROR_INIT:
OsDeInitPCB(child);
return -ret;
}
LITE_OS_SEC_TEXT INT32 OsClone(UINT32 flags, UINTPTR sp, UINT32 size)
{
UINT32 cloneFlag = CLONE_PARENT | CLONE_THREAD | CLONE_VFORK | CLONE_VM;
if (flags & (~cloneFlag)) {
PRINT_WARN("Clone dont support some flags!\n");
}
return OsCopyProcess(cloneFlag & flags, NULL, sp, size);
}
LITE_OS_SEC_TEXT INT32 LOS_Fork(UINT32 flags, const CHAR *name, const TSK_ENTRY_FUNC entry, UINT32 stackSize)
{
UINT32 cloneFlag = CLONE_PARENT | CLONE_THREAD | CLONE_VFORK | CLONE_FILES;
if (flags & (~cloneFlag)) {
PRINT_WARN("Clone dont support some flags!\n");
}
flags |= CLONE_FILES;
return OsCopyProcess(cloneFlag & flags, name, (UINTPTR)entry, stackSize);
}
#else
LITE_OS_SEC_TEXT_INIT UINT32 OsUserInitProcess(VOID)
{
return 0;
}
#endif
LITE_OS_SEC_TEXT VOID LOS_Exit(INT32 status)
{
UINT32 intSave;
/* The exit of a kernel - state process must be kernel - state and all threads must actively exit */
LosProcessCB *processCB = OsCurrProcessGet();
SCHEDULER_LOCK(intSave);
if (!OsProcessIsUserMode(processCB) && (processCB->threadNumber != 1)) {
SCHEDULER_UNLOCK(intSave);
PRINT_ERR("Kernel-state processes with multiple threads are not allowed to exit directly\n");
return;
}
SCHEDULER_UNLOCK(intSave);
OsTaskExitGroup((UINT32)status);
OsProcessExit(OsCurrTaskGet(), (UINT32)status);
}
LITE_OS_SEC_TEXT INT32 LOS_GetUsedPIDList(UINT32 *pidList, INT32 pidMaxNum)
{
LosProcessCB *pcb = NULL;
INT32 num = 0;
UINT32 intSave;
UINT32 pid = 1;
if (pidList == NULL) {
return 0;
}
SCHEDULER_LOCK(intSave);
while (OsProcessIDUserCheckInvalid(pid) == false) {
pcb = OS_PCB_FROM_PID(pid);
pid++;
if (OsProcessIsUnused(pcb)) {
continue;
}
pidList[num] = pcb->processID;
num++;
if (num >= pidMaxNum) {
break;
}
}
SCHEDULER_UNLOCK(intSave);
return num;
}
#ifdef LOSCFG_FS_VFS
LITE_OS_SEC_TEXT struct fd_table_s *LOS_GetFdTable(UINT32 pid)
{
LosProcessCB *pcb = NULL;
struct files_struct *files = NULL;
if (OS_PID_CHECK_INVALID(pid)) {
return NULL;
}
pcb = OS_PCB_FROM_PID(pid);
files = pcb->files;
if (files == NULL) {
return NULL;
}
return files->fdt;
}
#endif
LITE_OS_SEC_TEXT UINT32 LOS_GetCurrProcessID(VOID)
{
return OsCurrProcessGet()->processID;
}
LITE_OS_SEC_TEXT VOID OsProcessExit(LosTaskCB *runTask, INT32 status)
{
UINT32 intSave;
LOS_ASSERT(runTask == OsCurrTaskGet());
OsTaskResourcesToFree(runTask);
OsProcessResourcesToFree(OsCurrProcessGet());
SCHEDULER_LOCK(intSave);
OsProcessNaturalExit(runTask, status);
SCHEDULER_UNLOCK(intSave);
}
LITE_OS_SEC_TEXT UINT32 LOS_GetSystemProcessMaximum(VOID)
{
return g_processMaxNum;
}
LITE_OS_SEC_TEXT UINT32 OsGetUserInitProcessID(VOID)
{
return g_userInitProcess;
}
LITE_OS_SEC_TEXT UINT32 OsGetKernelInitProcessID(VOID)
{
return g_kernelInitProcess;
}
LITE_OS_SEC_TEXT UINT32 OsGetIdleProcessID(VOID)
{
return g_kernelIdleProcess;
}
LITE_OS_SEC_TEXT VOID OsSetSigHandler(UINTPTR addr)
{
OsCurrProcessGet()->sigHandler = addr;
}
LITE_OS_SEC_TEXT UINTPTR OsGetSigHandler(VOID)
{
return OsCurrProcessGet()->sigHandler;
}