Re: things to do for arch maintainers

[Steven Munroe <munroesj@us.ibm.com>]

Ulrich Drepper wrote:

> 1. on the setjmp code, make sure that for the code ending up inside 
> ld.so we don't call __sigjmp_save (see the x86, x86-64, ppc code)
>
> 2. add pointer_guard to tcbhead_t in <tls.h>
>
> 3. define THREAD_SET_POINTER_GUARD and THREAD_COPY_POINTER_GUARD in 
> <tls.h>
>
> 4. in <sysdep.h>, define PTR_MANGLE and PTR_DEMANGLE.  The ld.so code 
> must use the global variable __pointer_chk_guard_local.  The libc code 
> must use the tcbhead_t value.  C and asm versions are needed.  See the 
> x86-64 version
>
>
> All needs to be done for archs other than x86 and x86-64 (although 1 
> is done for ppc).
>
Jakub got to the powerpc change before I could finish testing my 
version. No problem with Jukub's quickness, but I notice that his 
version does not fill in the

"#if defined NOT_IN_libc && defined IS_IN_rtld"


case. While the X86_64 example does.

Is this acceptable or should I try to fill in the code for this case?

There are some difficulties with toc/got access before they are 
relocated, so this may be appropriate. But I wanted to verify that this 
omission is intended.