145-嵌入式软件开发导论ppt课件

1、NK.EXE OALRAM ROM/FLASHTimerINTCCPUCreateFile()Thread 3High PriorityMedium PriorityLow PriorityThread 3Resource Owner:Thread 2Thread 1Thread 1PriorityInversionPreemptPreemptBlockedPriorityRestoredThread 3Example: Thread 1 blocked waiting for resource owned by Thread 3, causing Priority InversionThre

2、ad 3BlockedThread 1Thread 2Blockedll释放InitializeCriticalSection分配的资源l删除Semaphore对象* 只在桌面Windows上存在Physical Memory* Storage DeviceVirtual MemoryLogical Memory (Heap, stack)C Runtime (mallc, new)Application数据的区域Memory Mapping(Shared)ReservedSlot 32:Process32.Slot 1:XIP DLL CodeSlot 0:Active Process2GB

3、2GB32MBKernel SpaceUserSpaceKernel Addresses: KPAGE, Trap Area, OthersSlot 97: NK.EXEUnusedStatically Mapped Virtual Addresses: Un-CachedStatically Mapped Virtual Addresses: CachedSlot 0 Current ProcessSlot 1 XIP DLL codeSlots 2-32 - ProcessesSlots 33-63Object Store and Memory-Mapped FilesFFFF FFFFE

4、000 0000C400 0000C200 0000C000 0000A000 00008000 00007FFF FFFF4200 00000400 00000200 00000000 0000Total 4 GB VirtualSpace2 GB2 GBKernel SpaceUser SpaceUnused2 GBUser512 MBUncached512 MBCached32 MB FlashPhysical MemoryVirtual Memory04000000820000008000 0000A000 0000C000 00000000000064 MB RAM0000 0000

5、64 MB RAM32 MB Flash64 MB RAMFFFF FFFFAddressTranslation32 MB FlashKernel SpaceUserSpaceSlot 30Slot 31Slot 32. . .01FF FFFF0001 00000000 000032 MB Process SpaceCurrent ProcessXIP ROM DLLsnk.exefilesys.exeshell.exedevice.exegwes.exeC400 0000C200 0000Free Virtual SpaceSlot 63. . .Resource DLLsSlot 2Slot 3Slot 4Slot 5Slot 1Slot 00A00 00003E00 00003C00 00004000 00004200 00000000 00000400 00000200 00000600 00000800 00000C00 0000. . .Slot 978000 00007E00 0000User mode threadWin32 API ThunksFunction CallCoredll.d