Re: [Valgrind-developers] ELF and dynamic loading

[John R. <jr...@Bi...>]

Bart Van Assche wrote:
> There is one GOT entry per shared library function, and these entries are
> shared over threads. Does anyone have a suggestion on how I can find out
> the address range of all GOT entries ? Then I can easily suppress data
> races triggered on the GOT.

Such entries are marked with a relocation type such as R_386_JUMP_SLOT
in a table described by DT_JMPREL and DT_PLTRELSZ, which can be found
in a PT_DYNAMIC segment.  Peruse the output from an example such as:
   readelf --headers --dynamic --reloc /bin/date
and refer to
   #include <elf.h>
for declarations.

There can be adventure here.  Both ld-linux.so and prelink may relocate
various items at varying times, and in the past the conventions have
changed from one release of glibc to another.

--