Re: cannot restore segment prot after reloc

[Jim Wilson]

Paul Turner wrote:
> What does this mean "cannot restore segment prot after reloc?
The message is from the dynamic linker, which is part of glibc.  See the 
glibc file elf/dl-reloc.c.
It means that you have a read-only section (like text) that contains 
relocs that require modifying the read-only section.  This requires a 
mprotect call before we can modify it, and a second mprotect call after 
the fact to make the section read-only again after we change it.  The 
second mprotect call failed.
Of course, if you have a proper shared library, you should not have any 
relocs against the text section.  Maybe you forgot to compile something 
as PIC?
Jim