Re: [PATCH, cross prelink] 0001-Pull-ld.so-s-name-from-PT_INTERP-to-avoid-the-runtim.patch

[Mark Hatle <mark.hatle@windriver.com>]

On 4/10/12 2:27 PM, Maxim Kuvyrkov wrote:
> Mark,
>
> This patch makes rtld emulator in cross prelink use ld.so's name as it is encoded in PT_INTERP header.
>
> Currently, rtld emulator returns "lib/ld.so.1" for runtime linker's name, but the linker actually expects "/lib/ld.so.1" -- that one slash at the beginning causes prelink checks done by the runtime linker to fail and not use prelink information.
>
> The runtime linker sets up a map for itself under the name stored in PT_INTERP header of the executable, and this patch makes rtld emulator follow the suit.
>
> I have tested this patch using a different version of rtld emulator (the one that CodeSourcery / Mentor maintains), but the function in question is the same in both, so this patch is also relevant for Yocto's prelink.
>
> Any comments?  Please merge at your leisure.

prelinker currently checks that the ld.so name matches what it's expecting for 
any given arch in the PL_ARCH structure.  Does this change any of that behavior? 
  Or does it simply change the internal prelink-rtld behavior so that it the 
prelink-rtld acts as if it's name is the PT_INTERP element?

--Mark