关于32位，64位，有谁能给一个清晰的解释?

olive

64位的程序能在32位的操作系统下运行吗？反之呢？\r\noracle 10g for aix 5L是32位的还是64位的？

orian

http://www.redbooks.ibm.com/pubs/pdfs/redbooks/sg245103.pdf\r\n\r\n看完这本书你就都明白了，但是英文的。实际上看头两章就可以了

icewood

希望这个对你有所帮助：\r\n\r\nWill my 64-bit application run on the 32-bit kernel?  [/COLOR] \r\nMost likely. The environment in which the application was built has no bearing on where it can run. Compiler switches are available to create either a 32-bit or a 64-bit executable program from program source code when compiled on either the 32-bit kernel or the 64-bit kernel. In addition, 32-bit programs and 64-bit programs can both be run on either the 32-bit kernel or the 64-bit kernel. However, if your application needs the use of a kernel extension (a program that extends the kernel and may, for example, provide a new system call for the application) which is not supported on both the 32- and 64-bit kernels, your application will only run with the kernel supported by the kernel extension.\r\n\r\n Will my 32-bit application run on the 64-bit kernel? [/COLOR]\r\nIt almost certainly will. The only case where a 32-bit application will not run on the 64-bit kernel is when an application needs the use of a kernel extension (a program that extends the kernel and may, for example, provide a new system call for the application) that is only available in 32-bit mode. One example of this is Oracle 8i, which contains a kernel extension that is only 32-bit enabled. Oracle 9 has no such restriction and runs on the 64-bit kernel. Applications do not normally provide kernel extensions.

olive

想问kernal的模式和OS的模式有什么区别？我的机器现在看来是OS是64位（/bin/lslpp -l bos.64bit显示已经安装及提交 ），但是kernal是32位（bootinfo -K=32)。

orian

理解错误啊。64位机器不能运行32位的aix/kernel/os\r\n\r\n装了bos.64bit只说明可以切换成伪64位支持而已

olive

越来越糊涂了。64位机器不能运行32位OS？到底是怎么个关系？\r\n伪64位支持是什么意思？\r\nRS64 IV是64位的CPU吗？\r\n\r\n

最初由 orian 发布\r\n[B]理解错误啊。64位机器不能运行32位的aix/kernel/os\r\n\r\n装了bos.64bit只说明可以切换成伪64位支持而已 [/B]

icewood

bos.64bit是一个OS里面支持64位的组件，就是一些软件包。具体你的OS，也就是内核，是不是64位的，要看你有没有进行64-bit enable。\r\n因此，有bos.64bit这个组件，并不证明你的OS就是64位的。从bootinfo -K的输出结果来看，你的OS是32位的。

piner

看到一个新文章\r\nhttp://www.ddvip.net/OS/aix/index2/49.htm