Thu Jun 8 02:50:26 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

	* elf/rtld.c [! NDEBUG] (__assert_perror_fail): New function.

	* hurd/hurdstartup.c (_hurd_startup): Fancier kludge to guess phdr
 	and user entry point addresses.

	* elf/dl-load.c (open_path): Don't do strlen on DIRPATH if it's null.
	(_dl_map_object): DT_RPATH value is relative to DT_STRTAB value.

	* Makerules (install-lib.so): Don't include libc.so.
	[$(build-shared)=yes] (install): Depend on the installed libc.so file.
	[$(build-shared)=yes] (install-no-libc.a): Make this, rather than
	install, depend on the installed $(install-lib.so) files.
	[$(build-shared)=yes] (install-lib.so): Append libc.so after that rule.

	* sysdeps/mach/hurd/dl-sysdep.c (_dl_sysdep_start): Add kludge to
 	allocate high addresses to avoid random mappings appearing there.
	(mmap): Comment out mask; always pass zero.

Tue Jun  6 13:34:53 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>

	* sysdeps/i386/dl-machine.h (ELF_MACHINE_USER_ADDRESS_MASK): New macro.
	* sysdeps/mach/hurd/dl-sysdep.c (mmap): Use it as mask in vm_map call.

	* elf/dl-error.c (_dl_catch_error): Clear *ERRSTRING and *OBJNAME
 	when successful.

	* sysdeps/mach/hurd/dl-sysdep.c (threadvars): New static variable.
	(__hurd_threadvar_max, __hurd_threadvar_stack_offset): Define these
	variables, using the `threadvars' buffer.

	* elf/dl-reloc.c: Don't dereference L->l_prev when it's null.
	* sysdeps/i386/dl-runtime.c: Likewise.

	* elf/rtld.c (dl_main): Add missing NULL terminating argument in
 	_dl_sysdep_fatal call.
	(__assert_fail): Likewise.

	* locale/Makefile (localedef-modules): Renamed ctype to
 	locale-ctype so as not to conflict with the object file for
 	ctype/ctype.c in the build directory.

	* sysdeps/i386/dl-machine.h (elf_machine_rel): If MAP->l_type is
 	lt_interpreter, first undo relocation done during bootstrapping.

2 files changed, 23 insertions, 3 deletions

diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index f387a887c1..5ef56a7088 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -88,10 +88,22 @@ elf_machine_rel (struct link_map *map,
       *reloc_addr = sym_value;
       break;
     case R_386_32:
+      if (map->l_type == lt_interpreter)
+	{
+	  /* Undo the relocation done here during bootstrapping.  Now we will
+	     relocate it anew, possibly using a binding found in the user
+	     program or a loaded library rather than the dynamic linker's
+	     built-in definitions used while loading those libraries.  */
+	  const Elf32_Sym *const dlsymtab
+	    = (void *) (map->l_addr + map->l_info[DT_SYMTAB]->d_un.d_ptr);
+	  *reloc_addr -= (map->l_addr +
+			  dlsymtab[ELF32_R_SYM (reloc->r_info)].st_value);
+	}
       *reloc_addr += sym_value;
       break;
     case R_386_RELATIVE:
-      *reloc_addr += map->l_addr;
+      if (map->l_type != lt_interpreter) /* Already done in dynamic linker.  */
+	*reloc_addr += map->l_addr;
       break;
     case R_386_PC32:
       *reloc_addr = sym_value - (Elf32_Addr) reloc_addr;
@@ -142,6 +154,12 @@ elf_machine_runtime_setup (struct link_map *l)
 }
 
 
+/* Mask identifying addresses reserved for the user program,
+   where the dynamic linker should not map anything.  */
+#define ELF_MACHINE_USER_ADDRESS_MASK	0xf8000000UL
+
+
+
 /* Initial entry point code for the dynamic linker.
    The C function `_dl_start' is the real entry point;
    its return value is the user program's entry point.  */
diff --git a/sysdeps/i386/dl-runtime.c b/sysdeps/i386/dl-runtime.c
index 8e218e2a62..aac5f993ea 100644
--- a/sysdeps/i386/dl-runtime.c
+++ b/sysdeps/i386/dl-runtime.c
@@ -54,8 +54,9 @@ _dl_runtime_resolve (Elf32_Word reloc_offset)
   real_next = l->l_next;
   if (l->l_info[DT_SYMBOLIC])
     {
-      l->l_prev->l_next = real_next;
       l->l_next = _dl_loaded;
+      if (l->l_prev)
+	l->l_prev->l_next = real_next;
       scope = l;
     }
   else
@@ -67,7 +68,8 @@ _dl_runtime_resolve (Elf32_Word reloc_offset)
   
   /* Restore list frobnication done above for DT_SYMBOLIC.  */
   l->l_next = real_next;
-  l->l_prev->l_next = l;
+  if (l->l_prev)
+    l->l_prev->l_next = l;
 
   /* Apply the relocation with that value.  */
   elf_machine_rel (l, reloc, loadbase, definer);