How Can I Determine the Architecture (x86 or x64) of a Native DLL Using Managed Code?-C++-php.cn

How Can I Determine the Architecture (x86 or x64) of a Native DLL Using Managed Code?

Barbara Streisand

Release： 2024-12-28 03:54:08

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How Can I Determine the Architecture (x86 or x64) of a Native DLL Using Managed Code?

Determining the Architecture of a Native DLL in Managed Code

To determine the architecture (x64 or x86) of a native DLL, you can utilize the PE header. This information is essential for the OS loader to execute the DLL correctly.

One option to extract this data is using the DUMPBIN utility. Use the /headers or /all flag, and the first listed file header will provide the architecture information. Here's an example:

64-bit DLL:

dumpbin /headers cv210.dll
Microsoft (R) COFF/PE Dumper Version 10.00.30319.01
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file cv210.dll

PE signature found

File Type: DLL

FILE HEADER VALUES
            8664 machine (x64)
               6 number of sections
        4BBAB813 time date stamp Tue Apr 06 12:26:59 2010
               0 file pointer to symbol table
               0 number of symbols
              F0 size of optional header
            2022 characteristics
                   Executable
                   Application can handle large (>2GB) addresses
                   DLL

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32-bit DLL:

dumpbin /headers acrdlg.dll
Microsoft (R) COFF/PE Dumper Version 10.00.30319.01
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file acrdlg.dll

PE signature found

File Type: DLL

FILE HEADER VALUES
             14C machine (x86)
               5 number of sections
        467AFDD2 time date stamp Fri Jun 22 06:38:10 2007
               0 file pointer to symbol table
               0 number of symbols
              E0 size of optional header
            2306 characteristics
                   Executable
                   Line numbers stripped
                   32 bit word machine
                   Debug information stripped
                   DLL

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To simplify the process, use find as follows:

dumpbin /headers cv210.dll |find "machine"
        8664 machine (x64)

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