* sysdeps/generic/ldsodefs.h (DL_ADDR_SYM_MATCH): For undefined

	symbol require exact match (these are PLTs).
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/ldsodefs.h
	(_dl_ppc64_addr_sym_match): Likewise.

ChangeLog

@@ -1,5 +1,10 @@
 2006-08-24  Ulrich Drepper  <drepper@redhat.com>
 
+	* sysdeps/generic/ldsodefs.h (DL_ADDR_SYM_MATCH): For undefined
+	symbol require exact match (these are PLTs).
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/ldsodefs.h
+	(_dl_ppc64_addr_sym_match): Likewise.
+
 	[BZ #2683]
 	* elf/dl-addr.c (_dl_addr): Don't ignore all undefined symbols.
 	If symbol has a value use it.

sysdeps/generic/ldsodefs.h

@@ -76,7 +76,7 @@ typedef struct link_map *lookup_t;
 /* On some architectures dladdr can't use st_size of all symbols this way.  */
 #define DL_ADDR_SYM_MATCH(L, SYM, MATCHSYM, ADDR) \
   ((ADDR) >= (L)->l_addr + (SYM)->st_value				\
-   && (((SYM)->st_size == 0						\
+   && ((((SYM)->st_shndx == SHN_UNDEF || (SYM)->st_size == 0)		\
 	&& (ADDR) == (L)->l_addr + (SYM)->st_value)			\
        || (ADDR) < (L)->l_addr + (SYM)->st_value + (SYM)->st_size)	\
    && ((MATCHSYM) == NULL || (MATCHSYM)->st_value < (SYM)->st_value))

sysdeps/unix/sysv/linux/powerpc/powerpc64/ldsodefs.h

@@ -1,5 +1,5 @@
 /* Run-time dynamic linker data structures for loaded ELF shared objects.
-   Copyright (C) 2005 Free Software Foundation, Inc.
+   Copyright (C) 2005, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -47,7 +47,7 @@ _dl_ppc64_addr_sym_match (const struct link_map *l, const ElfW(Sym) *sym,
 	    return false;
 	}
     }
-  else if (sym->st_size == 0)
+  else if (sym->st_shndx == SHN_UNDEF || sym->st_size == 0)
     {
       if (addr != value)
 	return false;