【背景】
 消除编译告警

【修改方案】
 消除编译告警

 re #I3ZC1R

 Change-Id: I594d0f57e4cbbdb246a6bef1c978a38228123a34
Signed-off-by: Nx-xiny <1301913191@qq.com>

Change-Id: I1d75cdcdcf9d06ec28e541cdfea77300da7c6bb1

fix compile errors in minimal compilation
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I48f4f7b27c684e2c747c1949776c5c4f9e383dec

1、在内核增加BlackBox核心框架，对外提供模块回调接口注册和故障处理接口。
2、增加默认的系统模块适配层，处理通用内核态和用户态故障日志抓取和保存。

Close #I3NN7V
Signed-off-by: Nqidechun <qidechun@huawei.com>

LiteOS_a中有部分配置宏进行了重复冗余定义，导致当头文件未被包含时，极易引入错误，
故对menuconfig配置宏进行统一处理，均使用#ifdef/#ifndef作为预编译判断方式

Close #I3YEGS

Change-Id: Ife6db770cc66de1d6199a4f3ba3950e9bfd0e71a
Signed-off-by: Nboxi <lewis.liulei@huawei.com>

sysroot and arch related cflags are pass by BUILD.gn now.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: Ia6000dd7ed8a8a37e935ace49d8460a919a16566

背景：LOS_UserMemClear接口原有实现是通过在内核中
申请一块堆内存并对其清零，调用copy_to_user来达到
对用户态内存清零的目的，需要使用堆内存。
修改方案：基于汇编实现内核对用户态内存清零的功能。

close #I3XXT0

Change-Id: I27cb1e45559cb75a9b330799fe427abd54f51c15
Signed-off-by: NHaryslee <lihao189@huawei.com>

1. 修复可能对NULL指针解引用的场景
2. 将不修改内容的指针入参修改为const
3. 对getpgrp的返回值进行校验后再使用
4. 修复了局部变量未初始化的问题

Close #I3UOFN
Signed-off-by: NFar <yesiyuan2@huawei.com>

support turn off as many features as possible.
current only libc and posix and bsd can not be turned off.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I1e97570c67593207a56dc11f357eca4b4a018bfd

背景: 当前信号实现原理是在系统调用结束和中断结束时检查是否有信号处理,
      如果有信号处理就切去处理信号，信号处理结束后回来继续按原来流程执行。
问题：当用户态线程在执行系统调用或缺页异常时，运行在内核态，如果此时有信
      号需要处理，且该线程已经持有了部分内核资源(如：锁，内存等), 此时如
      果有中断发生，则在中断结束时，就会去处理该信号，此时用户态线程持有
      了内核未释放的资源跑到了用户态去运行，如果该线程在用户态出现问题,
      那么它持有的内核资源就无法被释放了。
方案：用户态线程在执行系统调用和缺页异常时暂时屏蔽信号，防止此时有中断去
      处理信号，等系统调用结束或缺页异常结束时再去处理信号。
解决的问题：
  1. 执行系统调用或缺页异常时屏蔽信号，防止中断去处理信号
  2.解决无法kill 因为用户态的锁、ipc等阻塞的用户态线程
  3.进程退出方式转变为: 依次通过kill去杀死该进程的所有线程

Close #I3S0N0

Change-Id: I0c48b9c89382826191b8a9326c71b57ba84124c2

close: #I3I768

Change-Id: I4f801df4abe1a9afdf43391c28276e96a5e81513

Close #I3RAN4

Change-Id: Ice9bc67371ad85476ec99b46b7555d41abd93e94

Close #I3QFXL

Change-Id: Iaa036651415d93df231916d7534364ad3a86ed3c

Close #I3OAFR

Change-Id: I25b14572809b6fabb9e9d17de89a99047c02a59b

storage medium is separated from the shell module.

Change-Id: Id56939001d70bb92d9cc02bd7c9f55ca8b61cf5b

Change-Id: Id75a1b146766f448838afc80ad11cfd9d990e94e

after holding the scheduling lock in SMP.

Change-Id: I6f148d7b36d7aa6d0df09300949f53ea3c3d63b7

Close #I3OAFR

Change-Id: Icea238e20adf402d0ec1fc7e47ff4e58124a5e83

Provide a separate configuration macro for boot environment in RAM.
Depends on: Need to copy boot environment data to the specified ram by boot.

Closes #I3OADR

Change-Id: Ie36a92c0a44f245482d1602c3a6851395944776d

after holding the scheduling lock in SMP.

Change-Id: Ib10128fede9aa3e00269f1265089a917ffd96d88

the scheduling lock in SMP.

Change-Id: Idb793a5446126e638af52ff78b43bb7f8271317c

Change-Id: Idce45c48e41b6794de21635517cab8a9d2c9ef03

Change-Id: I052d930d54e63179b17b77f02c107a015f3cfc3f

Change-Id: I8d2e9f96e86f4130474da9898791240b5d42328e

Change-Id: Id2c76e3282d72bce18cf0925e12afaa0c3b06a90

Change-Id: Ie48b96fe9c8ab036d7234b56a169d6668171a895

Change-Id: I0580a9328f8824869f1744f31cbfc2bf85516f66

Change-Id: I5612d54d3cb92a119baaec396c723734c27a9d0c

Change-Id: Ifdca9a23ba788fa66f3815203514c9034680df49

Description: platform directory refactoring
Sig: kernel
Feature or Bugfix: Feature
Binary Source: No

Description: platform directory refactoring
Sig: kernel
Feature or Bugfix: Feature
Binary Source: No

Description:Fix the bug that the code segment and read-only segment can be modified in the uncache mapping area.
Sig:liteos_a
Feature or Bugfix:Bugfix
Binary Source:No

Change-Id: I030489b240d5bcbe088046392d566648fde85f0a

Description:Delete VM to support only kernel mode.
Sig:liteos_a
Feature or Bugfix:Feature
Binary Source:No

Change-Id: Ie1029c8fbc0c1b85c138663933118d2d148b7769

Change-Id: I6f7c469e96da9cc89c5c33bf7a9afe19625e175f

Change-Id: Ia6907482000a06aada11feb4c52347e8f93e73b5

修改region相关：优化OsVmRegionSplit红黑树节点操作，修改OsVmRegionAdjust起始地址不在region时的行为，修复OsIsRegionCanExpand计算错误，更正几处typos