process_syscall.c 文件参考

浏览源代码.

函数
static int	OsPermissionToCheck (unsigned int pid, unsigned int who)
static int	OsUserTaskSchedulerSet (unsigned int tid, unsigned short policy, unsigned short priority, bool policyFlag)
	设置用户级任务调度信息 更多...
void	SysSchedYield (int type)
int	SysSchedGetScheduler (int id, int flag)
int	SysSchedSetScheduler (int id, int policy, int prio, int flag)
int	SysSchedGetParam (int id, int flag)
int	SysSetProcessPriority (int which, int who, unsigned int prio)
int	SysSchedSetParam (int id, unsigned int prio, int flag)
int	SysGetProcessPriority (int which, int who)
int	SysSchedGetPriorityMin (int policy)
int	SysSchedGetPriorityMax (int policy)
int	SysSchedRRGetInterval (int pid, struct timespec *tp)
int	SysWait (int pid, USER int *status, int options, void *rusage)
int	SysWaitid (idtype_t type, int pid, USER siginfo_t *info, int options, void *rusage)
int	SysFork (void)
int	SysVfork (void)
unsigned int	SysGetPPID (void)
unsigned int	SysGetPID (void)
int	SysSetProcessGroupID (unsigned int pid, unsigned int gid)
	为指定进程设置进程组ID 更多...
int	SysGetProcessGroupID (unsigned int pid)
	获取指定进程的组ID,为0时返回当前进程ID 更多...
int	SysGetCurrProcessGroupID (void)
	获取当前进程组ID 更多...
int	SysGetUserID (void)
	获取用户ID 更多...
int	SysGetEffUserID (void)
int	SysGetEffGID (void)
int	SysGetRealEffSaveUserID (int *ruid, int *euid, int *suid)
int	SysSetUserID (int uid)
static int	SetRealEffSaveUserIDCheck (int ruid, int euid, int suid)
int	SysSetRealEffSaveUserID (int ruid, int euid, int suid)
int	SysSetRealEffUserID (int ruid, int euid)
int	SysSetGroupID (int gid)
int	SysGetRealEffSaveGroupID (int *rgid, int *egid, int *sgid)
static int	SetRealEffSaveGroupIDCheck (int rgid, int egid, int sgid)
int	SysSetRealEffSaveGroupID (int rgid, int egid, int sgid)
int	SysSetRealEffGroupID (int rgid, int egid)
int	SysGetGroupID (void)
static int	SetGroups (int listSize, const int *safeList, int size)
static int	GetGroups (int size, int list[])
int	SysGetGroups (int size, int list[])
int	SysSetGroups (int size, const int list[])
unsigned int	SysCreateUserThread (const TSK_ENTRY_FUNC func, const UserTaskParam *userParam, bool joinable)
int	SysSetThreadArea (const char *area)
char *	SysGetThreadArea (void)
int	SysUserThreadSetDetach (unsigned int taskID)
int	SysUserThreadDetach (unsigned int taskID)
int	SysThreadJoin (unsigned int taskID)
void	SysUserExitGroup (int status)
void	SysThreadExit (int status)
int	SysFutex (const unsigned int *uAddr, unsigned int flags, int val, unsigned int absTime, const unsigned int *newUserAddr)
	SysFutex 操作用户态快速互斥锁 系统调用 更多...
unsigned int	SysGetTid (void)
	获取当前任务ID 更多...
static int	SchedAffinityParameterPreprocess (int id, int flag, unsigned int *taskID, unsigned int *processID)
int	SysSchedGetAffinity (int id, unsigned int *cpuset, int flag)
int	SysSchedSetAffinity (int id, const unsigned short cpuset, int flag)

函数说明

GetGroups()

static int GetGroups ( int  size, int  list[]  )

static

在文件 process_syscall.c 第 759 行定义.

{
    unsigned int intSave;
    int groupCount;
    int ret;
    int *safeList = NULL;
    unsigned int listSize;
 
    SCHEDULER_LOCK(intSave);
    groupCount = OsCurrUserGet()->groupNumber;
    SCHEDULER_UNLOCK(intSave);
 
    listSize = groupCount * sizeof(int);
    if (size == 0) {
        return groupCount;
    } else if (list == NULL) {
        return -EFAULT;
    } else if (size < groupCount) {
        return -EINVAL;
    }
 
    safeList = LOS_MemAlloc(m_aucSysMem1, listSize);
    if (safeList == NULL) {
        return -ENOMEM;
    }
 
    SCHEDULER_LOCK(intSave);
    (void)memcpy_s(safeList, listSize, &OsCurrProcessGet()->user->groups[0], listSize);
    SCHEDULER_UNLOCK(intSave);
 
    ret = LOS_ArchCopyToUser(list, safeList, listSize);
    if (ret != 0) {
        groupCount = -EFAULT;
    }
 
    (void)LOS_MemFree(m_aucSysMem1, safeList);
    return groupCount;
}

函数调用图:

这是这个函数的调用关系图:

OsPermissionToCheck()

static int OsPermissionToCheck ( unsigned int  pid, unsigned int  who  )

static

在文件 process_syscall.c 第 48 行定义.

{
    int ret = LOS_GetProcessGroupID(pid);//获取进程组ID
    if (ret < 0) {
        return ret;
    } else if (ret == OS_KERNEL_PROCESS_GROUP) {//为内核进程组
        return -EPERM;
    } else if ((ret == OS_USER_PRIVILEGE_PROCESS_GROUP) && (pid != who)) {//为用户进程组,但两个参数进程不一致
        return -EPERM;
    } else if (pid == OsGetUserInitProcessID()) {//为用户进程的祖宗
        return -EPERM;
    }
 
    return 0;
}

函数调用图:

这是这个函数的调用关系图:

OsUserTaskSchedulerSet()

static int OsUserTaskSchedulerSet ( unsigned int  tid, unsigned short  policy, unsigned short  priority, bool  policyFlag  )

static

设置用户级任务调度信息

在文件 process_syscall.c 第 64 行定义.

{
    int ret;
    unsigned int intSave;
    bool needSched = false;
    SchedParam param = { 0 };
 
    if (OS_TID_CHECK_INVALID(tid)) {
        return EINVAL;
    }
 
    if (priority > OS_TASK_PRIORITY_LOWEST) {
        return EINVAL;
    }
 
    if ((policy != LOS_SCHED_FIFO) && (policy != LOS_SCHED_RR)) {
        return EINVAL;
    }
 
    LosTaskCB *taskCB = OS_TCB_FROM_TID(tid);
    SCHEDULER_LOCK(intSave);
    ret = OsUserTaskOperatePermissionsCheck(taskCB);
    if (ret != LOS_OK) {
        SCHEDULER_UNLOCK(intSave);
        return ret;
    }
 
    taskCB->ops->schedParamGet(taskCB, &param);
    param.policy = (policyFlag == true) ? policy : param.policy;
    param.priority = priority;
    needSched = taskCB->ops->schedParamModify(taskCB, &param);
    SCHEDULER_UNLOCK(intSave);
 
    LOS_MpSchedule(OS_MP_CPU_ALL);
    if (needSched && OS_SCHEDULER_ACTIVE) {
        LOS_Schedule();
    }
 
    return LOS_OK;
}

函数调用图:

这是这个函数的调用关系图:

SchedAffinityParameterPreprocess()

static int SchedAffinityParameterPreprocess ( int  id, int  flag, unsigned int *  taskID, unsigned int *  processID  )

static

在文件 process_syscall.c 第 1043 行定义.

{
    if (flag >= 0) {
        if (OS_PID_CHECK_INVALID(id)) {
            return -ESRCH;
        }
        *taskID = (id == 0) ? (OsCurrTaskGet()->taskID) : (OS_PCB_FROM_PID((UINT32)id)->threadGroupID);
        *processID = (id == 0) ? (OS_TCB_FROM_TID(*taskID)->processID) : id;
    } else {
        if (OS_TID_CHECK_INVALID(id)) {
            return -ESRCH;
        }
        *taskID = id;
        *processID = OS_INVALID_VALUE;
    }
    return LOS_OK;
}

函数调用图:

这是这个函数的调用关系图:

SetGroups()

static int SetGroups ( int  listSize, const int *  safeList, int  size  )

static

在文件 process_syscall.c 第 731 行定义.

{
    User *oldUser = NULL;
    unsigned int intSave;
 
    User *newUser = LOS_MemAlloc(m_aucSysMem1, sizeof(User) + listSize * sizeof(int));
    if (newUser == NULL) {
        return -ENOMEM;
    }
 
    SCHEDULER_LOCK(intSave);
    oldUser = OsCurrUserGet();
    (VOID)memcpy_s(newUser, sizeof(User), oldUser, sizeof(User));
    if (safeList != NULL) {
        (VOID)memcpy_s(newUser->groups, size * sizeof(int), safeList, size * sizeof(int));
    }
    if (listSize == size) {
        newUser->groups[listSize] = oldUser->gid;
    }
 
    newUser->groupNumber = listSize + 1;
    OsCurrProcessGet()->user = newUser;
    SCHEDULER_UNLOCK(intSave);
 
    (void)LOS_MemFree(m_aucSysMem1, oldUser);
    return 0;
}

函数调用图:

这是这个函数的调用关系图:

SetRealEffSaveGroupIDCheck()

static int SetRealEffSaveGroupIDCheck ( int  rgid, int  egid, int  sgid  )

static

在文件 process_syscall.c 第 659 行定义.

{
    if ((rgid < 0) && (rgid != -1)) {
        return -EINVAL;
    }
 
    if ((egid < 0) && (egid != -1)) {
        return -EINVAL;
    }
 
    if ((sgid < 0) && (sgid != -1)) {
        return -EINVAL;
    }
 
    return 0;
}

这是这个函数的调用关系图:

SetRealEffSaveUserIDCheck()

static int SetRealEffSaveUserIDCheck ( int  ruid, int  euid, int  suid  )

static

在文件 process_syscall.c 第 512 行定义.

{
    if ((ruid < 0) && (ruid != -1)) {
        return -EINVAL;
    }
 
    if ((euid < 0) && (euid != -1)) {
        return -EINVAL;
    }
 
    if ((suid < 0) && (suid != -1)) {
        return -EINVAL;
    }
 
    return 0;
}

这是这个函数的调用关系图:

SysCreateUserThread()

unsigned int SysCreateUserThread	(	const TSK_ENTRY_FUNC	func,
		const UserTaskParam *	userParam,
		bool	joinable
	)

在文件 process_syscall.c 第 882 行定义.

{
    TSK_INIT_PARAM_S param = { 0 };
    int ret;
 
    ret = LOS_ArchCopyFromUser(&(param.userParam), userParam, sizeof(UserTaskParam));
    if (ret != 0) {
        return OS_INVALID_VALUE;
    }
 
    param.pfnTaskEntry = func;
    if (joinable == TRUE) {
        param.uwResved = LOS_TASK_ATTR_JOINABLE;
    } else {
        param.uwResved = LOS_TASK_STATUS_DETACHED;
    }
 
    return OsCreateUserTask(OS_INVALID_VALUE, &param);
}

函数调用图:

SysFork()

int SysFork

(

void

)

在文件 process_syscall.c 第 350 行定义.

{
    return OsClone(0, 0, 0);
}

函数调用图:

SysFutex()

int SysFutex	(	const unsigned int *	uAddr,
		unsigned int	flags,
		int	val,
		unsigned int	absTime,
		const unsigned int *	newUserAddr
	)

SysFutex 操作用户态快速互斥锁 系统调用

参数

absTime	绝对时间
flags	操作标识(FUTEX_WAKE | FUTEX_WAIT)
newUserAddr	FUTEX_REQUEUE下调整后带回新的用户空间地址
uAddr	用户态下共享内存的地址,里面存放的是一个对齐的整型计数器
val

返回

参见

在文件 process_syscall.c 第 1022 行定义.

{
    if ((flags & FUTEX_MASK) == FUTEX_REQUEUE) {//调整队列标识
        return -OsFutexRequeue(uAddr, flags, val, absTime, newUserAddr);
    }
 
    if ((flags & FUTEX_MASK) == FUTEX_WAKE) {//唤醒标识
        return -OsFutexWake(uAddr, flags, val);//最多唤醒val个等待在uaddr上进程
    }
    //FUTEX_WAIT
    return -OsFutexWait(uAddr, flags, val, absTime);//设置线程等待 原子性的检查uaddr中计数器的值是否为val,
    //如果是则让进程休眠，直到FUTEX_WAKE或者超时(time-out)。也就是把进程挂到uaddr相对应的等待队列上去。
}

函数调用图:

SysGetCurrProcessGroupID()

int SysGetCurrProcessGroupID

(

void

)

获取当前进程组ID

在文件 process_syscall.c 第 401 行定义.

{
    return LOS_GetCurrProcessGroupID();
}

函数调用图:

SysGetEffGID()

int SysGetEffGID

(

void

)

在文件 process_syscall.c 第 426 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    UINT32 intSave;
    int egid;
 
    SCHEDULER_LOCK(intSave);
    egid = (int)OsCurrUserGet()->effGid;
    SCHEDULER_UNLOCK(intSave);
    return egid;
#else
    return 0;
#endif
}

函数调用图:

SysGetEffUserID()

int SysGetEffUserID

(

void

)

在文件 process_syscall.c 第 411 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    UINT32 intSave;
    int euid;
 
    SCHEDULER_LOCK(intSave);
    euid = (int)OsCurrUserGet()->effUserID;
    SCHEDULER_UNLOCK(intSave);
    return euid;
#else
    return 0;
#endif
}

函数调用图:

SysGetGroupID()

int SysGetGroupID

(

void

)

在文件 process_syscall.c 第 725 行定义.

{
    return LOS_GetGroupID();
}

函数调用图:

SysGetGroups()

int SysGetGroups	(	int	size,
		int	list[]
	)

在文件 process_syscall.c 第 799 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    return GetGroups(size, list);
#else
    int group = 0;
    int groupCount = 1;
    int ret;
 
    if (size == 0) {
        return groupCount;
    } else if (list == NULL) {
        return -EFAULT;
    } else if (size < groupCount) {
        return -EINVAL;
    }
 
    ret = LOS_ArchCopyToUser(list, &group, sizeof(int));
    if (ret != 0) {
        return -EFAULT;
    }
 
    return groupCount;
#endif
}

函数调用图:

SysGetPID()

unsigned int SysGetPID

(

void

)

在文件 process_syscall.c 第 365 行定义.

{
    return LOS_GetCurrProcessID();
}

函数调用图:

SysGetPPID()

unsigned int SysGetPPID

(

void

)

在文件 process_syscall.c 第 360 行定义.

{
    return OsCurrProcessGet()->parentProcessID;
}

函数调用图:

SysGetProcessGroupID()

int SysGetProcessGroupID

(

unsigned int

pid

)

获取指定进程的组ID,为0时返回当前进程ID

在文件 process_syscall.c 第 392 行定义.

{
    if (pid == 0) {
        pid = LOS_GetCurrProcessID();
    }
 
    return LOS_GetProcessGroupID(pid);
}

函数调用图:

SysGetProcessPriority()

int SysGetProcessPriority	(	int	which,
		int	who
	)

在文件 process_syscall.c 第 227 行定义.

{
    if (who == 0) {
        who = (int)LOS_GetCurrProcessID();
    }
 
    return OsGetProcessPriority(which, who);
}

函数调用图:

SysGetRealEffSaveGroupID()

int SysGetRealEffSaveGroupID	(	int *	rgid,
		int *	egid,
		int *	sgid
	)

在文件 process_syscall.c 第 622 行定义.

{
    int ret;
    int realGroupID, effGroupID, saveGroupID;
#ifdef LOSCFG_SECURITY_CAPABILITY
    unsigned int intSave;
 
    SCHEDULER_LOCK(intSave);
    realGroupID = OsCurrUserGet()->gid;
    effGroupID = OsCurrUserGet()->effGid;
    saveGroupID = OsCurrUserGet()->effGid;
    SCHEDULER_UNLOCK(intSave);
#else
    realGroupID = 0;
    effGroupID = 0;
    saveGroupID = 0;
#endif
 
    ret = LOS_ArchCopyToUser(rgid, &realGroupID, sizeof(int));
    if (ret != 0) {
        return -EFAULT;
    }
 
    ret = LOS_ArchCopyToUser(egid, &effGroupID, sizeof(int));
    if (ret != 0) {
        return -EFAULT;
    }
 
    ret = LOS_ArchCopyToUser(sgid, &saveGroupID, sizeof(int));
    if (ret != 0) {
        return -EFAULT;
    }
 
    return 0;
}

函数调用图:

SysGetRealEffSaveUserID()

int SysGetRealEffSaveUserID	(	int *	ruid,
		int *	euid,
		int *	suid
	)

在文件 process_syscall.c 第 441 行定义.

{
    int ret;
    int realUserID, effUserID, saveUserID;
#ifdef LOSCFG_SECURITY_CAPABILITY
    unsigned int intSave;
 
    SCHEDULER_LOCK(intSave);
    realUserID = OsCurrUserGet()->userID;
    effUserID = OsCurrUserGet()->effUserID;
    saveUserID = OsCurrUserGet()->effUserID;
    SCHEDULER_UNLOCK(intSave);
#else
    realUserID = 0;
    effUserID = 0;
    saveUserID = 0;
#endif
 
    ret = LOS_ArchCopyToUser(ruid, &realUserID, sizeof(int));
    if (ret != 0) {
        return -EFAULT;
    }
 
    ret = LOS_ArchCopyToUser(euid, &effUserID, sizeof(int));
    if (ret != 0) {
        return -EFAULT;
    }
 
    ret = LOS_ArchCopyToUser(suid, &saveUserID, sizeof(int));
    if (ret != 0) {
        return -EFAULT;
    }
 
    return 0;
}

函数调用图:

SysGetThreadArea()

char * SysGetThreadArea

(

void

)

在文件 process_syscall.c 第 925 行定义.

{
    return (char *)(OsCurrTaskGet()->userArea);
}

函数调用图:

SysGetTid()

unsigned int SysGetTid

(

void

)

获取当前任务ID

在文件 process_syscall.c 第 1037 行定义.

{
    return OsCurrTaskGet()->taskID;
}

函数调用图:

SysGetUserID()

int SysGetUserID

(

void

)

获取用户ID

在文件 process_syscall.c 第 406 行定义.

{
    return LOS_GetUserID();
}

函数调用图:

SysSchedGetAffinity()

int SysSchedGetAffinity	(	int	id,
		unsigned int *	cpuset,
		int	flag
	)

在文件 process_syscall.c 第 1062 行定义.

{
    int ret;
    unsigned int processID;
    unsigned int taskID;
    unsigned int intSave;
    unsigned int cpuAffiMask;
 
    ret = SchedAffinityParameterPreprocess(id, flag, &taskID, &processID);
    if (ret != LOS_OK) {
        return ret;
    }
 
    SCHEDULER_LOCK(intSave);
    if (flag >= 0) {
        if (OsProcessIsInactive(OS_PCB_FROM_PID(processID))) {
            SCHEDULER_UNLOCK(intSave);
            return -ESRCH;
        }
    } else {
        ret = OsUserTaskOperatePermissionsCheck(OS_TCB_FROM_TID(taskID));
        if (ret != LOS_OK) {
            SCHEDULER_UNLOCK(intSave);
            if (ret == EINVAL) {
                return -ESRCH;
            }
            return -ret;
        }
    }
 
#ifdef LOSCFG_KERNEL_SMP
    cpuAffiMask = (unsigned int)OS_TCB_FROM_TID(taskID)->cpuAffiMask;
#else
    cpuAffiMask = 1;
#endif /* LOSCFG_KERNEL_SMP */
 
    SCHEDULER_UNLOCK(intSave);
    ret = LOS_ArchCopyToUser(cpuset, &cpuAffiMask, sizeof(unsigned int));
    if (ret != LOS_OK) {
        return -EFAULT;
    }
 
    return LOS_OK;
}

函数调用图:

SysSchedGetParam()

int SysSchedGetParam	(	int	id,
		int	flag
	)

在文件 process_syscall.c 第 164 行定义.

{
    SchedParam param = { 0 };
    unsigned int intSave;
 
    if (flag < 0) {
        if (OS_TID_CHECK_INVALID(id)) {
            return -EINVAL;
        }
 
        LosTaskCB *taskCB = OS_TCB_FROM_TID(id);
        SCHEDULER_LOCK(intSave);
        int ret = OsUserTaskOperatePermissionsCheck(taskCB);
        if (ret != LOS_OK) {
            SCHEDULER_UNLOCK(intSave);
            return -ret;
        }
 
        taskCB->ops->schedParamGet(taskCB, &param);
        SCHEDULER_UNLOCK(intSave);
        return (int)param.priority;
    }
 
    if (id == 0) {
        id = (int)LOS_GetCurrProcessID();
    }
 
    if (OS_PID_CHECK_INVALID(id)) {
        return -EINVAL;
    }
 
    return OsGetProcessPriority(LOS_PRIO_PROCESS, id);
}

函数调用图:

SysSchedGetPriorityMax()

int SysSchedGetPriorityMax

(

int

policy

)

在文件 process_syscall.c 第 245 行定义.

{
    if (policy != LOS_SCHED_RR) {
        return -EINVAL;
    }
 
    return OS_USER_PROCESS_PRIORITY_LOWEST;
}

SysSchedGetPriorityMin()

int SysSchedGetPriorityMin

(

int

policy

)

在文件 process_syscall.c 第 236 行定义.

{
    if (policy != LOS_SCHED_RR) {
        return -EINVAL;
    }
 
    return OS_USER_PROCESS_PRIORITY_HIGHEST;
}

SysSchedGetScheduler()

int SysSchedGetScheduler	(	int	id,
		int	flag
	)

在文件 process_syscall.c 第 113 行定义.

{
    unsigned int intSave;
    SchedParam param = { 0 };
    int ret;
 
    if (flag < 0) {
        if (OS_TID_CHECK_INVALID(id)) {
            return -EINVAL;
        }
 
        LosTaskCB *taskCB = OS_TCB_FROM_TID(id);
        SCHEDULER_LOCK(intSave);
        ret = OsUserTaskOperatePermissionsCheck(taskCB);
        if (ret != LOS_OK) {
            SCHEDULER_UNLOCK(intSave);
            return -ret;
        }
 
        taskCB->ops->schedParamGet(taskCB, &param);
        SCHEDULER_UNLOCK(intSave);
        return (int)param.policy;
    }
 
    return LOS_GetProcessScheduler(id);
}

函数调用图:

SysSchedRRGetInterval()

int SysSchedRRGetInterval	(	int	pid,
		struct timespec *	tp
	)

在文件 process_syscall.c 第 254 行定义.

{
    unsigned int intSave;
    int ret;
    SchedParam param = { 0 };
    time_t timeSlice = 0;
    struct timespec tv;
    LosTaskCB *taskCB = NULL;
    LosProcessCB *processCB = NULL;
 
    if (tp == NULL) {
        return -EINVAL;
    }
 
    if (OS_PID_CHECK_INVALID(pid)) {
        return -EINVAL;
    }
 
    if (pid == 0) {
        processCB = OsCurrProcessGet();
    } else {
        processCB = OS_PCB_FROM_PID(pid);
    }
 
    SCHEDULER_LOCK(intSave);
    /* if can not find process by pid return ESRCH */
    if (OsProcessIsInactive(processCB)) {
        SCHEDULER_UNLOCK(intSave);
        return -ESRCH;
    }
 
    LOS_DL_LIST_FOR_EACH_ENTRY(taskCB, &processCB->threadSiblingList, LosTaskCB, threadList) {
        if (!OsTaskIsInactive(taskCB)) {
            taskCB->ops->schedParamGet(taskCB, &param);
            if (param.policy == LOS_SCHED_RR) {
                timeSlice += param.timeSlice;
            }
        }
    }
 
    SCHEDULER_UNLOCK(intSave);
 
    timeSlice = timeSlice * OS_NS_PER_CYCLE;
    tv.tv_sec = timeSlice / OS_SYS_NS_PER_SECOND;
    tv.tv_nsec = timeSlice % OS_SYS_NS_PER_SECOND;
    ret = LOS_ArchCopyToUser(tp, &tv, sizeof(struct timespec));
    if (ret != 0) {
        return -EFAULT;
    }
 
    return 0;
}

函数调用图:

SysSchedSetAffinity()

int SysSchedSetAffinity	(	int	id,
		const unsigned short	cpuset,
		int	flag
	)

在文件 process_syscall.c 第 1108 行定义.

{
    int ret;
    unsigned int processID;
    unsigned int taskID;
    unsigned int intSave;
    unsigned short currCpuMask;
    bool needSched = FALSE;
 
    if (cpuset > LOSCFG_KERNEL_CPU_MASK) {
        return -EINVAL;
    }
 
    ret = SchedAffinityParameterPreprocess(id, flag, &taskID, &processID);
    if (ret != LOS_OK) {
        return ret;
    }
 
    if (flag >= 0) {
        ret = OsPermissionToCheck(processID, LOS_GetCurrProcessID());
        if (ret != LOS_OK) {
            return ret;
        }
        SCHEDULER_LOCK(intSave);
        if (OsProcessIsInactive(OS_PCB_FROM_PID(processID))) {
            SCHEDULER_UNLOCK(intSave);
            return -ESRCH;
        }
    } else {
        SCHEDULER_LOCK(intSave);
        ret = OsUserTaskOperatePermissionsCheck(OS_TCB_FROM_TID(taskID));
        if (ret != LOS_OK) {
            SCHEDULER_UNLOCK(intSave);
            if (ret == EINVAL) {
                return -ESRCH;
            }
            return -ret;
        }
    }
 
    needSched = OsTaskCpuAffiSetUnsafe(taskID, cpuset, &currCpuMask);
    SCHEDULER_UNLOCK(intSave);
    if (needSched && OS_SCHEDULER_ACTIVE) {
        LOS_MpSchedule(currCpuMask);
        LOS_Schedule();
    }
 
    return LOS_OK;
}

函数调用图:

SysSchedSetParam()

int SysSchedSetParam	(	int	id,
		unsigned int	prio,
		int	flag
	)

在文件 process_syscall.c 第 218 行定义.

{
    if (flag < 0) {
        return -OsUserTaskSchedulerSet(id, LOS_SCHED_RR, prio, false);
    }
 
    return SysSetProcessPriority(LOS_PRIO_PROCESS, id, prio);
}

函数调用图:

SysSchedSetScheduler()

int SysSchedSetScheduler	(	int	id,
		int	policy,
		int	prio,
		int	flag
	)

在文件 process_syscall.c 第 140 行定义.

{
    int ret;
 
    if (flag < 0) {
        return -OsUserTaskSchedulerSet(id, policy, prio, true);
    }
 
    if (prio < OS_USER_PROCESS_PRIORITY_HIGHEST) {
        return -EINVAL;
    }
 
    if (id == 0) {
        id = (int)LOS_GetCurrProcessID();
    }
 
    ret = OsPermissionToCheck(id, LOS_GetCurrProcessID());
    if (ret < 0) {
        return ret;
    }
 
    return OsSetProcessScheduler(LOS_PRIO_PROCESS, id, prio, policy);
}

函数调用图:

SysSchedYield()

void SysSchedYield

(

int

type

)

在文件 process_syscall.c 第 105 行定义.

{
    (void)type;
 
    (void)LOS_TaskYield();
    return;
}

函数调用图:

SysSetGroupID()

int SysSetGroupID

(

int

gid

)

在文件 process_syscall.c 第 577 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    int ret = -EPERM;
    unsigned int intSave;
    unsigned int count;
    unsigned int oldGid;
    User *user = NULL;
 
    if (gid < 0) {
        return -EINVAL;
    }
 
    SCHEDULER_LOCK(intSave);
    user = OsCurrUserGet();
    if (IsCapPermit(CAP_SETGID)) {
        oldGid = user->gid;
        user->gid = gid;
        user->effGid = gid;
        for (count = 0; count < user->groupNumber; count++) {
            if (user->groups[count] == oldGid) {
                user->groups[count] = gid;
                ret = LOS_OK;
                goto EXIT;
            }
        }
    } else if (user->gid != gid) {
        goto EXIT;
    }
 
    ret = LOS_OK;
    /* add process to a user */
EXIT:
    SCHEDULER_UNLOCK(intSave);
    return ret;
 
#else
    if (gid != 0) {
        return -EPERM;
    }
 
    return 0;
#endif
}

函数调用图:

这是这个函数的调用关系图:

SysSetGroups()

int SysSetGroups	(	int	size,
		const int	list[]
	)

在文件 process_syscall.c 第 825 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    int ret;
    int gid;
    int listSize = size;
    unsigned int count;
    int *safeList = NULL;
#endif
 
    if ((size != 0) && (list == NULL)) {
        return -EFAULT;
    }
 
    if ((size < 0) || (size > OS_GROUPS_NUMBER_MAX)) {
        return -EINVAL;
    }
 
#ifdef LOSCFG_SECURITY_CAPABILITY
    if (!IsCapPermit(CAP_SETGID)) {
        return -EPERM;
    }
 
    if (size != 0) {
        safeList = LOS_MemAlloc(m_aucSysMem1, size * sizeof(int));
        if (safeList == NULL) {
            return -ENOMEM;
        }
 
        ret = LOS_ArchCopyFromUser(safeList, list, size * sizeof(int));
        if (ret != 0) {
            ret = -EFAULT;
            goto EXIT;
        }
        gid = OsCurrUserGet()->gid;
        for (count = 0; count < size; count++) {
            if (safeList[count] == gid) {
                listSize = size - 1;
            } else if (safeList[count] < 0) {
                ret = -EINVAL;
                goto EXIT;
            }
        }
    }
 
    ret = SetGroups(listSize, safeList, size);
EXIT:
    if (safeList != NULL) {
        (void)LOS_MemFree(m_aucSysMem1, safeList);
    }
 
    return ret;
#else
    return 0;
#endif
}

函数调用图:

SysSetProcessGroupID()

int SysSetProcessGroupID	(	unsigned int	pid,
		unsigned int	gid
	)

为指定进程设置进程组ID

在文件 process_syscall.c 第 370 行定义.

{
    int ret;
 
    if (pid == 0) {//无指定进程ID时 @note_thinking 此处会不会有风险, 直接返回会不会好些 ?
        pid = LOS_GetCurrProcessID();//获取当前进程ID,给当前进程设置组ID
    }
 
    if (gid == 0) {
        gid = pid;
    } else if (gid <= OS_USER_PRIVILEGE_PROCESS_GROUP) {
        return -EPERM;
    }
 
    ret = OsPermissionToCheck(pid, gid);
    if (ret < 0) {
        return ret;
    }
 
    return OsSetProcessGroupID(pid, gid);
}

函数调用图:

SysSetProcessPriority()

int SysSetProcessPriority	(	int	which,
		int	who,
		unsigned int	prio
	)

在文件 process_syscall.c 第 198 行定义.

{
    int ret;
 
    if (prio < OS_USER_PROCESS_PRIORITY_HIGHEST) {
        return -EINVAL;
    }
 
    if (who == 0) {
        who = (int)LOS_GetCurrProcessID();
    }
 
    ret = OsPermissionToCheck(who, LOS_GetCurrProcessID());
    if (ret < 0) {
        return ret;
    }
 
    return OsSetProcessScheduler(which, who, prio, LOS_GetProcessScheduler(who));
}

函数调用图:

这是这个函数的调用关系图:

SysSetRealEffGroupID()

int SysSetRealEffGroupID	(	int	rgid,
		int	egid
	)

在文件 process_syscall.c 第 713 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    return SysSetRealEffSaveGroupID(rgid, egid, -1);
#else
    if ((rgid != 0) || (egid != 0)) {
        return -EPERM;
    }
    return 0;
#endif
}

函数调用图:

SysSetRealEffSaveGroupID()

int SysSetRealEffSaveGroupID	(	int	rgid,
		int	egid,
		int	sgid
	)

在文件 process_syscall.c 第 677 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    int ret;
 
    if ((rgid == -1) && (egid == -1) && (sgid == -1)) {
        return 0;
    }
 
    ret = SetRealEffSaveGroupIDCheck(rgid, egid, sgid);
    if (ret != 0) {
        return ret;
    }
 
    if (rgid >= 0) {
        if (((egid != -1) && (egid != rgid)) || ((sgid != -1) && (sgid != rgid))) {
            return -EPERM;
        }
        return SysSetGroupID(rgid);
    } else if (egid >= 0) {
        if ((sgid != -1) && (sgid != egid)) {
            return -EPERM;
        }
        return SysSetGroupID(egid);
    } else {
        return SysSetGroupID(sgid);
    }
 
#else
    if ((rgid != 0) || (egid != 0) || (sgid != 0)) {
        return -EPERM;
    }
    return 0;
#endif
}

函数调用图:

这是这个函数的调用关系图:

SysSetRealEffSaveUserID()

int SysSetRealEffSaveUserID	(	int	ruid,
		int	euid,
		int	suid
	)

在文件 process_syscall.c 第 530 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    int ret;
 
    if ((ruid == -1) && (euid == -1) && (suid == -1)) {
        return 0;
    }
 
    ret = SetRealEffSaveUserIDCheck(ruid, euid, suid);
    if (ret != 0) {
        return ret;
    }
 
    if (ruid >= 0) {
        if (((euid != -1) && (euid != ruid)) || ((suid != -1) && (suid != ruid))) {
            return -EPERM;
        }
        return SysSetUserID(ruid);
    } else if (euid >= 0) {
        if ((suid != -1) && (suid != euid)) {
            return -EPERM;
        }
        return SysSetUserID(euid);
    } else {
        return SysSetUserID(suid);
    }
#else
    if ((ruid != 0) || (euid != 0) || (suid != 0)) {
        return -EPERM;
    }
    return 0;
#endif
}

函数调用图:

这是这个函数的调用关系图:

SysSetRealEffUserID()

int SysSetRealEffUserID	(	int	ruid,
		int	euid
	)

在文件 process_syscall.c 第 565 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    return SysSetRealEffSaveUserID(ruid, euid, -1);
#else
    if ((ruid != 0) || (euid != 0)) {
        return -EPERM;
    }
    return 0;
#endif
}

函数调用图:

SysSetThreadArea()

int SysSetThreadArea

(

const char *

area

)

在文件 process_syscall.c 第 902 行定义.

{
    unsigned int intSave;
    int ret = LOS_OK;
 
    if (!LOS_IsUserAddress((unsigned long)(uintptr_t)area)) {
        return EINVAL;
    }
 
    LosTaskCB *taskCB = OsCurrTaskGet();
    SCHEDULER_LOCK(intSave);
    LosProcessCB *processCB = OS_PCB_FROM_PID(taskCB->processID);
    if (processCB->processMode != OS_USER_MODE) {
        ret = EPERM;
        goto OUT;
    }
 
    taskCB->userArea = (unsigned long)(uintptr_t)area;
OUT:
    SCHEDULER_UNLOCK(intSave);
    return ret;
}

函数调用图:

SysSetUserID()

int SysSetUserID

(

int

uid

)

在文件 process_syscall.c 第 477 行定义.

{
#ifdef LOSCFG_SECURITY_CAPABILITY
    int ret = -EPERM;
    unsigned int intSave;
 
    if (uid < 0) {
        return -EINVAL;
    }
 
    SCHEDULER_LOCK(intSave);
    User *user = OsCurrUserGet();
    if (IsCapPermit(CAP_SETUID)) {
        user->userID = uid;
        user->effUserID = uid;
        /* add process to a user */
    } else if (user->userID != uid) {
        goto EXIT;
    }
 
    ret = LOS_OK;
    /* add process to a user */
EXIT:
    SCHEDULER_UNLOCK(intSave);
    return ret;
#else
    if (uid != 0) {
        return -EPERM;
    }
 
    return 0;
#endif
}

函数调用图:

这是这个函数的调用关系图:

SysThreadExit()

void SysThreadExit

(

int

status

)

在文件 process_syscall.c 第 1005 行定义.

{
    OsRunningTaskToExit(OsCurrTaskGet(), (unsigned int)status);
}

函数调用图:

SysThreadJoin()

int SysThreadJoin

(

unsigned int

taskID

)

在文件 process_syscall.c 第 976 行定义.

{
    unsigned int intSave;
    int ret;
 
    if (OS_TID_CHECK_INVALID(taskID)) {
        return EINVAL;
    }
 
    LosTaskCB *taskCB = OS_TCB_FROM_TID(taskID);
    SCHEDULER_LOCK(intSave);
    ret = OsUserTaskOperatePermissionsCheck(taskCB);
    if (ret != LOS_OK) {
        goto EXIT;
    }
 
    ret = (int)OsTaskJoinPendUnsafe(OS_TCB_FROM_TID(taskID));
 
EXIT:
    SCHEDULER_UNLOCK(intSave);
    return ret;
}

函数调用图:

SysUserExitGroup()

void SysUserExitGroup

(

int

status

)

在文件 process_syscall.c 第 999 行定义.

{
    (void)status;
    OsProcessThreadGroupDestroy();
}

函数调用图:

SysUserThreadDetach()

int SysUserThreadDetach

(

unsigned int

taskID

)

在文件 process_syscall.c 第 953 行定义.

{
    unsigned int intSave;
    int ret;
 
    if (OS_TID_CHECK_INVALID(taskID)) {
        return EINVAL;
    }
 
    SCHEDULER_LOCK(intSave);
    ret = OsUserTaskOperatePermissionsCheck(OS_TCB_FROM_TID(taskID));
    SCHEDULER_UNLOCK(intSave);
    if (ret != LOS_OK) {
        return ret;
    }
 
    if (LOS_TaskDelete(taskID) != LOS_OK) {
        return ESRCH;
    }
 
    return LOS_OK;
}

函数调用图:

SysUserThreadSetDetach()

int SysUserThreadSetDetach

(

unsigned int

taskID

)

在文件 process_syscall.c 第 930 行定义.

{
    unsigned int intSave;
    int ret;
 
    if (OS_TID_CHECK_INVALID(taskID)) {
        return EINVAL;
    }
 
    LosTaskCB *taskCB = OS_TCB_FROM_TID(taskID);
    SCHEDULER_LOCK(intSave);
    ret = OsUserTaskOperatePermissionsCheck(taskCB);
    if (ret != LOS_OK) {
        goto EXIT;
    }
 
    ret = (int)OsTaskSetDetachUnsafe(taskCB);
 
EXIT:
    SCHEDULER_UNLOCK(intSave);
    return ret;
}

函数调用图:

SysVfork()

int SysVfork

(

void

)

在文件 process_syscall.c 第 355 行定义.

{
    return OsClone(CLONE_VFORK, 0, 0);
}

函数调用图:

SysWait()

int SysWait	(	int	pid,
		USER int *	status,
		int	options,
		void *	rusage
	)

在文件 process_syscall.c 第 307 行定义.

{
    (void)rusage;
 
    return LOS_Wait(pid, status, (unsigned int)options, NULL);
}

函数调用图:

SysWaitid()

int SysWaitid	(	idtype_t	type,
		int	pid,
		USER siginfo_t *	info,
		int	options,
		void *	rusage
	)

在文件 process_syscall.c 第 314 行定义.

{
    (void)rusage;
    int ret;
    int truepid = 0;
 
    switch (type) {
        case P_ALL:
            /* Wait for any child; id is ignored. */
            truepid = -1;
            break;
        case P_PID:
            /* Wait for the child whose process ID matches id */
            if (pid <= 0) {
                return -EINVAL;
            }
            truepid = pid;
            break;
        case P_PGID:
            /* Wait for any child whose process group ID matches id */
            if (pid <= 1) {
                return -EINVAL;
            }
            truepid = -pid;
            break;
        default:
            return -EINVAL;
    }
 
    ret = LOS_Waitid(truepid, info, (unsigned int)options, NULL);
    if (ret > 0) {
        ret = 0;
    }
    return ret;
}

函数调用图: