[PATCH] Two more vDSO issues

[Jakub Jelinek]

Hi!

1) l->ld needs to be relocated as well (I did not catch this up in my
   previous testing, because vDSO was mapped both in the new place and
   in the old location)
2) if kernel provides just AT_SYSINFO_EHDR but not AT_SYSINFO, ld.so would
   segfault.

2004-02-27  Jakub Jelinek  <jakub@redhat.com>

	* elf/rtld.c (dl_main): Adjust l->l_ld of the vDSO by l->l_addr.
	* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Only set
	GL(dl_sysinfo) if non-zero.

--- libc/elf/rtld.c.jj	2004-02-27 13:51:54.000000000 +0100
+++ libc/elf/rtld.c	2004-02-27 14:56:05.000000000 +0100
@@ -1246,6 +1246,7 @@ ERROR: ld.so: object '%s' from %s cannot
 	  l->l_map_start = (ElfW(Addr)) GL(dl_sysinfo_dso);
 	  l->l_addr = l->l_map_start - l->l_addr;
 	  l->l_map_end += l->l_addr;
+	  l->l_ld = (void *) ((ElfW(Addr)) l->l_ld + l->l_addr);
 	  elf_get_dynamic_info (l, dyn_temp);
 	  _dl_setup_hash (l);
 	  l->l_relocated = 1;
--- libc/sysdeps/generic/dl-sysdep.c.jj	2004-02-27 17:08:24.000000000 +0100
+++ libc/sysdeps/generic/dl-sysdep.c	2004-02-27 17:18:39.992891935 +0100
@@ -201,7 +201,7 @@ _dl_sysdep_start (void **start_argptr,
 
 #if defined NEED_DL_SYSINFO
   /* Only set the sysinfo value if we also have the vsyscall DSO.  */
-  if (GL(dl_sysinfo_dso) != 0)
+  if (GL(dl_sysinfo_dso) != 0 && new_sysinfo)
     GL(dl_sysinfo) = new_sysinfo;
 #endif
 

	Jakub