32-bit | 易学教程

what is meant by 32-bit application?

阅读更多关于 what is meant by 32-bit application?

问题 I am not sure what is meant by 16-bit or 32-bit applications. Is that a 16-bit application is an application which would not require more than 2^16 bytes of memory space? Does this 16-bit refers to the max size of the application? 回答1: A 32-bit application is software that runs in a 32-bit flat address space. Answers to common questions Will a 64 bit CPU run a standard (32-bit) program on a 64-bit version of an OS? Yes it will. 64 bit systems are backward compatible with the 32 bit

How can I build for linux 32-bit with go1.6.2

阅读更多关于 How can I build for linux 32-bit with go1.6.2

问题 Is there any combination of GOARCH and GOOS values which I can set in order to build ELF 32-bit binary? 回答1: GOOS=linux and GOARCH=386 . More examples: architecture: 32-bit -> GOARCH=386 64-bit -> GOARCH=amd64 OS: Windows -> GOOS=windows Linux -> GOOS=linux OS X -> GOOS=darwin FreeBSD -> GOOS=freebsd For the complete list (valid "individual" values) refer to go/build/syslist.go file: const goosList = "android darwin dragonfly freebsd linux nacl netbsd openbsd plan9 solaris windows " const

Ubuntu : dpkg --add-architecture i386 throwing error --add-architecture unknown option

阅读更多关于 Ubuntu : dpkg --add-architecture i386 throwing error --add-architecture unknown option

问题 I want to enable extra architecture (of 32-bit) in my 64 bit machine . I did dpkg --print-architecture to know the already known architecture i.e.amd64 . After that I did dpkg --print--foreign-architectures and got the result as i386(I want to enable this) . But when i typed dpkg --add-architecture i386 , it is throwing an error saying that unknown option -add-architecture ? Please suggest some solutions for this . I refer this link by the way : https://wiki.debian.org/Multiarch/HOWTO 回答1:

Issue running 32-bit executable on 64-bit Windows

阅读更多关于 Issue running 32-bit executable on 64-bit Windows

问题 I'll add 500 of my own rep as a bounty when SO lets me. I'm using wkhtmltopdf to convert HTML web pages to PDFs. This works perfectly on my 32-bit dev server [unfortunately, I can't ship my machine :-p ]. However, when I deploy to the web application's 64-bit server the following errors are displayed: (running from cmd.exe) C:\>wkhtmltopdf http://www.google.com google.pdf Loading pages (1/5) QFontEngine::loadEngine: GetTextMetrics failed () ] 10% QFontEngineWin: GetTextMetrics failed ()

cannot convert from 'const char [3]' to 'char *' x100000 (Qt Creator C++ Windows 32)

阅读更多关于 cannot convert from 'const char [3]' to 'char *' x100000 (Qt Creator C++ Windows 32)

问题 Everything was working fine just five minutes ago when I tapped f5 and got 102 errors: error: C2440: 'initializing' : cannot convert from 'const char [17]' to 'char *' Conversion from string literal loses const qualifier (see /Zc:strictStrings) That specific one is at line 30: char* hexchars = "0123456789ABCDEF"; I haven't touched the file the errors are in for at least a week. I'd normally say I accidentally changed something in the compile args or something, but I haven't opened settings

Would one have to know the machine architecture to write code?

阅读更多关于 Would one have to know the machine architecture to write code?

问题 Let's say I'm programming in Java or Python or C++ for a simple problem, could be to build an TCP/UDP echo server or computation of factorial. Do I've to bother about the architecture details, i.e., if it is 32 or 64-bit? IMHO, unless I'm programming something to do with fairly low-level stuff then I don't have to bother if its 32 or 64 bit. Where am I going wrong? Or am I correct??? 回答1: correct for most circumstances The runtime/language/compiler will abstract those details unless you are

get the filesize of very large .gz file on a 64bit platform

阅读更多关于 get the filesize of very large .gz file on a 64bit platform

问题 According to the specifiction of gz the filesize is saved in the last 4bytes of a .gz file. I have created 2 files with dd if=/dev/urandom of=500M bs=1024 count=500000 dd if=/dev/urandom of=5G bs=1024 count=5000000 I gziped them gzip 500M 5G I checked the last 4 bytes doing tail -c4 500M|od -I (returns 512000000 as expected) tail -c4 5G|od -I (returns 825032704 as not expected) It seems that hitting the invisible 32bit barrier, makes the value written into the ISIZE completely nonsense. Which

32 bit program on 64 bit computer doesn't crash on NullReferenceException

阅读更多关于 32 bit program on 64 bit computer doesn't crash on NullReferenceException

问题 This question was migrated from Software Engineering Stack Exchange because it can be answered on Stack Overflow. Migrated 5 years ago . I have a piece of code that throws a NullReferenceException : dataSource.DataSource = GetView(); It throws because dataSource is null . GetView returns a DataTable . However, when run on the one computer (64 bits), the program continues without any problems. The Exception does happen, because when I step, I end up completely somewhere else. The debugger

Can a 32-bit program use more than 4GB of memory on a 64-bit OS?

阅读更多关于 Can a 32-bit program use more than 4GB of memory on a 64-bit OS?

问题 Is a 32-bit program running on a 64-bit OS able to use more than 4GB of memory if available? 回答1: Short answer is: yes. Longer answer is depends. There is a hardware support for page re-mapping, which basically gives your program a window of a few pages into a larger area of memory. This window is however, should be managed by the program itself and will not get support from memory manager. There are examples of programs doing that like SQL on Windows. However, in general it is a bad idea and

x86 and x64 share instruction set?

阅读更多关于 x86 and x64 share instruction set?

I don't know how 32bit application can run on a 64bit OS. My understanding is 32bit/64bit refers to register size. An instruction set should be different as they have different sizes of register. But I know there is x86-64 instruction set that is the 64bit version of the x86 instruction set. Is the reason we can run 32bit application on 64bit OS is because of the x86-64? If so, why are 32bit applications sometimes not compatible in 64bit windows? Why do we need WOW64? (Sometimes we are asked to choose which version to install.) Does x64 instruction set have any other instruction set except x86