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Re: Question about the ldd output
- From: "Lavrentiev, Anton (NIH/NLM/NCBI) [C] via cygwin" <cygwin at cygwin dot com>
- To: "'cygwin at cygwin dot com'" <cygwin at cygwin dot com>
- Date: Mon, 8 Jul 2019 18:00:07 +0000
- Subject: Re: Question about the ldd output
- Ironport-sdr: 4GynbMXP9KGdYKca/LtK75NO6Rm3Jl+nxzSdFXJ8klA4cAnfqf62p/nqX/IxPaG616UVMgbX7t rR+Wnw3m8LK0fgg4UT6owKfKMDVlky4kOJYMQoriS/ZF1dB0/8i/9d0/Wm+kjIcWjdts7xof9q I3d0hgNz6ml8ubumti22MPyA+35MWNoOc6us0HZVLKzoSVsKn/bixPu10Wr5i+2j1GUyS6WdBb nJMHpWcfRgCHWUMkJFQLGCug9abF6eb4J7wTWt74UKXV9Xbea/TfABkhI+lkqymSeMCtkAdSaL 8gM=
- Reply-to: "Lavrentiev, Anton (NIH/NLM/NCBI) [C]" <lavr at ncbi dot nlm dot nih dot gov>
Well, I don't think there's anything special that Cygwin does to load executables, because these are essentially Windows processes, so they are loaded by Windows, first and foremost.
But it gets even weirder. Below are two _consecutive!_ runs of ldd on the very same executable. Why the output differs so drastically (including the unknown dlls all of a sudden)?
1.
ntdll.dll => /cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll (0x7ffc339d0000)
KERNEL32.DLL => /cygdrive/c/WINDOWS/System32/KERNEL32.DLL (0x7ffc31a00000)
KERNELBASE.dll => /cygdrive/c/WINDOWS/System32/KERNELBASE.dll (0x7ffc30090000)
cygbz2-1.dll => /usr/bin/cygbz2-1.dll (0x3f6a40000)
cygcom_err-2.dll => /usr/bin/cygcom_err-2.dll (0x3ef750000)
cyggssapi_krb5-2.dll => /usr/bin/cyggssapi_krb5-2.dll (0x3eceb0000)
cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x3ec980000)
cygpcre-1.dll => /usr/bin/cygpcre-1.dll (0x3eb1a0000)
cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3ee3a0000)
cygstdc++-6.dll => /usr/bin/cygstdc++-6.dll (0x3ea280000)
cygz.dll => /cygdrive/u/2.4.0/release/Cygwin-64/bin/cygz.dll (0x3aba30000)
cygk5crypto-3.dll => /usr/bin/cygk5crypto-3.dll (0x3ec300000)
cygwin1.dll => /cygdrive/u/2.4.0/release/Cygwin-64/bin/cygwin1.dll (0x180040000)
??? => ??? (0xe80000)
??? => ??? (0x1440000)
??? => ??? (0xe80000)
cygkrb5-3.dll => /usr/bin/cygkrb5-3.dll (0x3ec170000)
cygkrb5support-0.dll => /usr/bin/cygkrb5support-0.dll (0x3ec150000)
cygintl-8.dll => /usr/bin/cygintl-8.dll (0x3ec8d0000)
2.
ntdll.dll => /cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll (0x7ffc339d0000)
KERNEL32.DLL => /cygdrive/c/WINDOWS/System32/KERNEL32.DLL (0x7ffc31a00000)
KERNELBASE.dll => /cygdrive/c/WINDOWS/System32/KERNELBASE.dll (0x7ffc30090000)
cygbz2-1.dll => /usr/bin/cygbz2-1.dll (0x3f6a40000)
cygcom_err-2.dll => /usr/bin/cygcom_err-2.dll (0x3ef750000)
cyggssapi_krb5-2.dll => /usr/bin/cyggssapi_krb5-2.dll (0x3eceb0000)
cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x3ec980000)
cygpcre-1.dll => /usr/bin/cygpcre-1.dll (0x3eb1a0000)
cygwin1.dll => /cygdrive/u/2.4.0/release/Cygwin-64/bin/cygwin1.dll (0x180040000)
cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3ee3a0000)
cygstdc++-6.dll => /usr/bin/cygstdc++-6.dll (0x3ea280000)
cygk5crypto-3.dll => /usr/bin/cygk5crypto-3.dll (0x3ec300000)
cygkrb5-3.dll => /usr/bin/cygkrb5-3.dll (0x3ec170000)
cygz.dll => /cygdrive/u/2.4.0/release/Cygwin-64/bin/cygz.dll (0x3aba30000)
cygkrb5support-0.dll => /usr/bin/cygkrb5support-0.dll (0x3ec150000)
cygintl-8.dll => /usr/bin/cygintl-8.dll (0x3ec8d0000)
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