General ELF Library: Offset Offset Offset

Question

There is a software package elfutilsthat includes a program called eu-elflintfor checking ELF binaries (just like lintfor C - hence the name).

Just for curiosity, I checked our own shared libraries with this tool and found many problems, for example:

eu-elflint libUtils.so

section [ 2] '.dynsym': _DYNAMIC symbol size 0 does not match dynamic segment size 248
section [ 2] '.dynsym': _GLOBAL_OFFSET_TABLE_ symbol size 0 does not match .got.plt     section size 3076
section [ 8] '.rel.plt': relocation 0: offset out of bounds
section [ 8] '.rel.plt': relocation 1: offset out of bounds
...
section [ 8] '.rel.plt': relocation 765: offset out of bounds

As a cross validation, I created a very trivial shared library from the source code below

int foo(int a) {
   return a + 1;
}

// gcc -shared -fPIC -o libfoo.so foo.c

And tried again ...

eu-elflint libfoo.so

section [ 9] '.rel.plt': relocation 0: offset out of bounds
section [ 9] '.rel.plt': relocation 1: offset out of bounds
section [23] '.comment' has wrong flags: expected none, is MERGE|STRINGS
section [25] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol size 0 does not match .got.plt section size 20
section [25] '.symtab': _DYNAMIC symbol size 0 does not match dynamic segment size 200

As you can see, even a trivial example also shows a lot of problems.

BTW: I'm on Ubuntu-Karmic-32bit with gcc v4.4.1

By the way: ... the same thing happens on Debian-Lenny-64bit with gcc v4.2.4

Is this something I should worry about?

Answer 1

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: elflint ABI, ELF. ABI, ELF : ABI , ELF ( , ). , elflint , / (GNU binutils ). elflint ELF, GNU binutils, elflint . , , elflint, binutils. elflint , , linux .