{"id":2259,"date":"2022-08-30T15:23:22","date_gmt":"2022-08-30T15:23:22","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/01\/05\/problem-about-device-driver-collection-of-common-programming-errors\/"},"modified":"2022-08-30T15:23:22","modified_gmt":"2022-08-30T15:23:22","slug":"problem-about-device-driver-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2022\/08\/30\/problem-about-device-driver-collection-of-common-programming-errors\/","title":{"rendered":"problem about device-driver-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/b82b1249398df2761c0f62b31fe03a98?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nwhatisinaname<br \/>\nvisual-c++ driver device-driver winddk nt-native-api<br \/>\nI am building a driver and i want to read some files. Is there any way to use &#8220;ZwReadFile()&#8221; or a similar function to read the contents of the files line by line so that i can process them in a loop.The documentation in MSDN states that :- ZwReadFile begins reading from the given ByteOffset or the current file position into the given Buffer. It terminates the read operation under one of the following conditions:The buffer is full because the number of bytes specified by the Length parameter has<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/2b88fc7fbd850cda978c8005b4064225?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nRoman R.<br \/>\nc++ webcam directshow device-driver winddk<br \/>\nI want to develop a virtual webcam driver which from User mode I&#8217;ll pass image to it and it will display as webcam output. I don&#8217;t want to use DirectX filter and CSourceStream etc. Because they don&#8217;t work on some programs which doesn&#8217;t use DirectX for capturing webcam image. I have to write a kernel mode device driver so.Any ideas? I tried testcap from DDK samples, but it doesn&#8217;t process image from user mode and doesn&#8217;t get any input, just it displays 7 colors in webcam&#8230;Any help would be great<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/006e901151b153171d7a5918b56c511c?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nInductiveload<br \/>\nosx memory-management device-driver kext<br \/>\nI have written a device driver kext for a hot-plug SCSI device, based somewhat on Wagerlabs code (using a driver-user client-application model) and everything works. The only remaining concern is that the driver appears not to be consistently freed, especially if the application crashes. For example, when I try to unload the kext, even with the device disconnected and the application closed, there are still outstanding instances of the driver and user client (with the driver generally outnumberi<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/TFLmI.png?s=32&amp;g=1\" \/><br \/>\nWarren P<br \/>\nwindows-7 device-driver crash-dumps nt-native-api<br \/>\nI am experiencing a crash in an application, that is crashing windows 7, but not in the traditional &#8220;blue screen of death&#8221; crash, that happens when device drivers or other kernel-space processes crash the whole system, but rather, I am seeing a lock-up of all user-space processes. Here is the state of the machine:(1) Windows mouse movement is still responding, and Aero composition layer is still working (certain mouse over effects in explorer still work), but no win32 process is working, and th<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/f9341836ce1cf04cd7e128e4c8b1db99?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nThinkingStiff<br \/>\nlanguage-agnostic device-driver wdk winddk<br \/>\nI just installed the Windows Driver Kit for XP &#8211; Windows 7 and this may come as a silly question, but what is the difference between a &#8220;free build&#8221; and a &#8220;checked build&#8221;?PS: I&#8217;m not a driver developer, I installed it merely to check some header files for P\/Invoke.<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/fbb3a67d76e63784088fd0a783c33b6c?s=32&amp;d=identicon&amp;r=PG&amp;f=1\" \/><br \/>\nWIN_SOM_LIV<br \/>\nwindows device-driver drivers<br \/>\nI made a device driver. But my system crashed at the moment when it was deleting the device object. I think the symbolic link was deleted and it crashed after it was trying to delete the device as I can&#8217;t see the symbolic link in the Global. How do I delete this device now. It also gives me a error popup(system cannot find the file specified Device\\Mydriver) when I try to open the listed Mydriver under devices from Winobj.I tried starting the driver&#8217;s service again. I do get a handle back when<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/0540bf12cb491b871b0c2435e6d530fb?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nray pixar<br \/>\nc open-source device-driver kernel-programming<br \/>\nAre there any open source C Library (not c++) for Windows Driver Development ?I am developing a network device driver that need some functionality such as RegEx, string manipulation, Object Oriented by C and XML and so on&#8230;thanks.<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/f985a4c68186d71e537401140be2866d?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\njohnflan<br \/>\noperating-system kernel device-driver<br \/>\nI see that kernel mode drivers are risky as they run in privileged mode, but are there any monolithic kernel&#8217;s that do any form of driver\/loadable module sandboxing or is this really the domain of microkernels?<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/3970d94160c29074841f889291bf7f38?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nsana<br \/>\nwindows crash device-driver<br \/>\nI am writing a PCIe device driver. With PCIe I have a storage device connected. I have allocated a buffer in memory using malloc() which I use to transmit data to and receive from my hardware. The buffer area is locked and the physical addresses of the locked pages are passed to the DMA, I have in my hardware. DMA uses physical addresses for data transmission to\/from device. The transmission of data to storage device is working fine, that is whatever data I have in memory buffer is transmitted c<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/56e17cbc8c5ea5b37d67018db6d030b0?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nlarsmans<br \/>\nc linux-kernel device-driver memcpy<br \/>\nI&#8217;m trying to write a Linux device driver. I&#8217;ve got it to work really well, until I tried to use &#8220;memcpy&#8221;. I don&#8217;t even get a compiler error, when I &#8220;make&#8221; it just warns me: WARNING: &#8220;memcpy&#8221; [\/root\/homedir\/sv\/main.ko] undefined!OK and when I try to load via insmod, I get on the console:insmod: error inserting &#8216;.\/main.ko&#8217;: -1 Unknown symbol in moduleand on dmesg:main: Unknown symbol memcpy (err 0)I include the following:#include &lt;linux\/module.h&gt; #include &lt;linux\/moduleparam.h&gt; #includ<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8579087f6aad114044755cd7d64a36c9?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nThomas Owens<br \/>\njava operating-system device-driver<br \/>\nIntroductionI heard something about writing device drivers in Java (heard as in &#8220;with my ears&#8221;, not from the internet) and was wondering&#8230; I always thought device drivers operated on an operating system level and thus must be written in the same language as the OS (thus mostly C I suppose)QuestionsAm I generally wrong with this assumption? (it seems so) How can a driver in an &#8220;alien&#8221; language be used in the OS? What are the requirements (from a programming language point of view) for a device d<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/adee7a90b0b74f6e2c40726e08e3f954?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nEd.C<br \/>\nwindows delphi winapi delphi-2010 device-driver<br \/>\nHoping to find somebody that has experience with services in windows.I am trying to use the NdisProt driver for ethernet adapters in Delphimy_Handle := CreateFile(PChar(&#8216;\\\\.\\NdisProt&#8217;),GENERIC_WRITE or GENERIC_READ, 0, nil,OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);(have tried with \\\\.\\\\NdisProt too)After execution my_Handle always has the value &#8216;4008&#8217; decimal and GetLastError always returns 0If I try to read or write to the file I get acces violation, anybody knows why I&#8217;m getting this unwanted b<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/729442eea8d8548842a6e0947e333c7b?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nChris Jester-Young<br \/>\nlinux module device-driver<br \/>\nI have three Linux kernel modules (*.ko files). They have circular dependencies like this:mod1.ko uses functions exported by mod3.ko mod2.ko uses functions exported by mod1.ko mod3.ko uses functions exported by mod1.ko and mod2.koI cannot load the first mod1.ko file because of &#8220;Unknown symbol&#8221; error. I also tried two other methods but I got the same error:load all modules at a timeinsmod mod1.ko mod2.ko mod3.koPut these files in \/lib\/modules\/kernel_version\/my_modules, and rundepmod kernel_versio<\/li>\n<\/ul>\n<p id=\"rop\"><small>Originally posted 2014-01-05 09:33:22. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>whatisinaname visual-c++ driver device-driver winddk nt-native-api I am building a driver and i want to read some files. Is there any way to use &#8220;ZwReadFile()&#8221; or a similar function to read the contents of the files line by line so that i can process them in a loop.The documentation in MSDN states that :- ZwReadFile [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2259","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/2259","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=2259"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/2259\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=2259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=2259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=2259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}