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64 Bit Driver Porting

Stumped: What would replace 'names' in an alternate history? Got code in your driver that does something like the following (whatever this does -I copied if off some web site): _asm { movsdxmm1, QWORD_PTR foo; mulsdxmm1, xmm0; ...}

If you So, the AMD64 rocks, and the 64-bit version of Windows looks to be a winner. Likewise INT and UNIT and DWORD (you're not using these data types anyhow, right) don?t change.

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Most stuff stays the same. Because ULONG is always 32 bits, on a 64-bit system you?re trying to hammer a 64-bit pointer into a 32-bit storage location. Thus, if the initial author had written: PMDL MdlPointers[10]; the compiler would have no cause to complain and the storage would be automatically 64 bits. Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you!

Well, the cleanest way to solve this particular problem would be to redefine the IOCTL so that it doesn?t pass the pointer within the data structure. You wouldn't need to make changes to the code unless the code makes assumptions about things like the size of pointers, integers etc. We will also propose a path for replacing Binder, Android's IPC. Write what you need to do in C.

Main Menu LQ Calendar LQ Rules LQ Sitemap Site FAQ View New Posts View Latest Posts Zero Reply Threads LQ Wiki Most Wanted Jeremy's Blog Report LQ Bug Syndicate Latest Porting Brain Dump Here's the quick rundown on everything you need to know about porting your driver to run on the AMD64 under 64-bit Windows. Windows will thunk buf (the IOCTL IN_BUFFER pointer) to 64 bits automatically. news We've got a special diagnostic team that's standing by.

But, if you forget to do so, 64-bit Windows on the AMD64 will not blue screen. Of the things they need to learn, it seems to me that the hardest thing for them to grasp is what they don't need to do. By changing the declaration of MdlPointers from ULONG to ULONG_PTR, we've said that the field will be 32 bits on 32-bit Windows and 64 bits on 64-bit Windows. Compiling works and the drivers are loaded through a custom script which puts them into the system32/drivers directory and adds the necessary keys to the registry.

Password Programming This forum is for all programming questions. http://stackoverflow.com/questions/3179972/port-32-bit-windows-driver-to-64-bit-windows Available as a setup executable Please read the Release Notes and Installation Guides. may not work. Then you re-compile, add the necessary "installMyDriver.NTAMD64" section to your INF, and you're done.

Compiling for 64-Bit works and it just doesn't load the driver on Windows 7 64-bit (but is signed and listed in the keyboard drivers). Porting Your Driver to 64-Bit Windows The 64-bit version of Windows is designed to make it possible for developers to use a single source-code base for their 32-bit and 64-bit Windows Find all such continuous functions English equivalent of the Persian proverb "When there's fire, wet and dry burn together" Showing that roots of a quadratic polynomial are of opposite signs. Your code's not right even for 32-bit Windows.

When we promise, we deliver. The 64-bit version of Windows for the AMD64 uses table-based exception handling, so each function needs to have a very specific prologue and epilog. Contact Us - Advertising Info - Rules - LQ Merchandise - Donations - Contributing Member - LQ Sitemap - Main Menu Linux Forum Android Forum Chrome OS Forum Search LQ But if you want to be 100% sure, or you want to make such an alignment change obvious to future maintainers, or your code includes changes to the default packing, you

What do I do if I have to pass the secondary buffer pointer embedded in the IN_BUFFER?" Fine. If your driver runs properly on 32-bit Windows systems using PAE (these systems have more than 4GB of physical memory) - which it should - then you're all set. Or something.

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FTDI drivers may be used only in conjunction with products based on FTDI parts. What incentives (or stated motives) did the US have to attack Syria? So, let me be very clear: The size of LONG and ULONG does not change. In addition, from kernel mode, the 64-bit version of Windows does not support MMX, 3DNow, or X87 floating point.

Writing WDF Drivers I: Core Concepts LAB Nashua (Amherst), NH 15-19 May 2017 Writing WDF Drivers II: Advanced Implementation Techniques LAB Nashua (Amherst), NH 23-26 May 2017 Kernel Debugging and Crash Jul 6 '10 at 13:15 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote The build option looks correct. The AMD-64 compiler does not support in-line assembler code. Abstract This presentation will focus on the issues we faced while porting Android's IPC mechanisms, binder and ashmem, to 64-bit.