问题描述
我有一个.a文件，我想从中获取体系结构信息.运行file myFile.a会导致file.a: current ar archive.如何获得有关文件包含的体系结构的更多信息?
I have a .a file from which I want to get architecture information. Running file myFile.a results in file.a: current ar archive. How can I get more information on what architecture the file contains?
推荐答案
您还可以跳过ar命令并使用 readelf ，例如:
You can also skip the ar command and use readelf, via something like:
readelf -h <archive>.a | grep 'Class\|File\|Machine'
[00:32:15] /usr/lib $ readelf -h libxslt.a | grep 'Class\|File\|Machine'
File: libxslt.a(attrvt.o)
Class: ELF32
Machine: Intel 80386
File: libxslt.a(xslt.o)
Class: ELF32
Machine: Intel 80386
... #Trimmed this, it goes on a bit
File: libxslt.a(transform.o)
Class: ELF32
Machine: Intel 80386
File: libxslt.a(security.o)
Class: ELF32
Machine: Intel 80386
[00:32:24] /usr/lib $
如果相关，这里是您可以从readelf -h获取的其他信息.我只是用grep修剪了上面的内容，显然:
In case it's relevant, here's the other information that you can get from readelf -h. I just trimmed the above with grep, obviously:
File: libxslt.a(security.o)
ELF Header:
Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: REL (Relocatable file)
Machine: Intel 80386
Version: 0x1
Entry point address: 0x0
Start of program headers: 0 (bytes into file)
Start of section headers: 2548 (bytes into file)
Flags: 0x0
Size of this header: 52 (bytes)
Size of program headers: 0 (bytes)
Number of program headers: 0
Size of section headers: 40 (bytes)
Number of section headers: 16
Section header string table index: 13
该输出用于libxslt.a中的一个对象文件，但每个文件都提供相同的信息.
That output is for one of the object files in libxslt.a, but it gives the same information for each file.
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