Re: dso loading question

Kev (klmitch@MIT.EDU)
Thu, 27 May 1999 09:53:50 EDT

> [kanoj@entity /tmp]$ strace ./a.out
> execve("./a.out", ["./a.out"], [/* 18 vars */]) = 0
> brk(0) = 0x8049558
> open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or directory)

lists dso's to link before any other dynamic linking occurs; useful for
overriding, say, malloc().

> open("/etc/ld.so.cache", O_RDONLY) = 3

Contains a cache of where dso's are located on the disk, so the dynamic
linker doesn't have to search for them.

> I am trying to understand how dso loading works in Linux, specially at
> program startup time.

You might want to look at the source...

-- 
Kevin L. Mitchell <klmitch@mit.edu>
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