Re: Shared Library starter, ld.so

[Richard Henderson <rth@twiddle.net>]

On Thu, Jun 05, 2003 at 10:46:18AM -0400, Richard B. Johnson wrote:
> The dynamic linker, provided with RedHat 9 no longer
> compiles with the de facto standard of having register
> EDX point to function to be called before exit.

You're wrong.  Indeed, the rh9 crt1.o still expects the value:


   8:   50                      push   %eax
   9:   54                      push   %esp
   a:   52                      push   %edx		<<==== HERE
   b:   68 00 00 00 00          push   $0x0
                        c: R_386_32     __libc_csu_fini
  10:   68 00 00 00 00          push   $0x0
                        11: R_386_32    __libc_csu_init
  15:   51                      push   %ecx
  16:   56                      push   %esi
  17:   68 00 00 00 00          push   $0x0
                        18: R_386_32    main
  1c:   e8 fc ff ff ff          call   1d <_start+0x1d>
                        1d: R_386_PC32  __libc_start_main

and ld.so provides the value here:

        # Pass our finalizer function to the user in %edx, as per ELF ABI.\n\
        leal _dl_fini@GOTOFF(%ebx), %edx\n\



r~