diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 449d4fbf688..333eb6e0e83 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,15 @@
+2012-09-11  Joel Brobecker  <brobecker@adacore.com>
+
+	* symtab.h (struct minimal_symbol) [has_size]: New field.
+	(MSYMBOL_SIZE): Adjust to forbid macro from being used as lvalue.
+	(SET_MSYMBOL_SIZE, MSYMBOL_HAS_SIZE): New macros.
+	* printcmd.c (build_address_symbolic): Only filter out zero-sized
+	minimal symbols if the symbol's size is actually known.
+	* minsyms.c (prim_record_minimal_symbol_full): Adjust setting
+	of msymbol's size field.  Add comment.
+	* elfread.c (elf_symtab_read, elf_rel_plt_read): Use
+	SET_MSYMBOL_SIZE to set the minimal symbol size.
+
 2012-09-11  Joel Brobecker  <brobecker@adacore.com>
 
 	* minsyms.c (install_minimal_symbols): Use memset to fill entire
diff --git a/gdb/elfread.c b/gdb/elfread.c
index f3967d72b48..516cbd0e3a4 100644
--- a/gdb/elfread.c
+++ b/gdb/elfread.c
@@ -570,7 +570,7 @@ elf_symtab_read (struct objfile *objfile, int type,
 		elf_sym = (elf_symbol_type *) sym->udata.p;
 
 	      if (elf_sym)
-		MSYMBOL_SIZE(msym) = elf_sym->internal_elf_sym.st_size;
+		SET_MSYMBOL_SIZE (msym, elf_sym->internal_elf_sym.st_size);
 
 	      msym->filename = filesymname;
 	      gdbarch_elf_make_msymbol_special (gdbarch, sym, msym);
@@ -594,7 +594,7 @@ elf_symtab_read (struct objfile *objfile, int type,
 						  sym->section, objfile);
 		  if (mtramp)
 		    {
-		      MSYMBOL_SIZE (mtramp) = MSYMBOL_SIZE (msym);
+		      SET_MSYMBOL_SIZE (mtramp, MSYMBOL_SIZE (msym));
 		      mtramp->created_by_gdb = 1;
 		      mtramp->filename = filesymname;
 		      gdbarch_elf_make_msymbol_special (gdbarch, sym, mtramp);
@@ -689,7 +689,7 @@ elf_rel_plt_read (struct objfile *objfile, asymbol **dyn_symbol_table)
                                     1, address, mst_slot_got_plt, got_plt,
 				    objfile);
       if (msym)
-	MSYMBOL_SIZE (msym) = ptr_size;
+	SET_MSYMBOL_SIZE (msym, ptr_size);
     }
 
   do_cleanups (back_to);
diff --git a/gdb/minsyms.c b/gdb/minsyms.c
index b6df4eae2d7..a3a376cf3be 100644
--- a/gdb/minsyms.c
+++ b/gdb/minsyms.c
@@ -937,7 +937,9 @@ prim_record_minimal_symbol_full (const char *name, int name_len, int copy_name,
   MSYMBOL_TYPE (msymbol) = ms_type;
   MSYMBOL_TARGET_FLAG_1 (msymbol) = 0;
   MSYMBOL_TARGET_FLAG_2 (msymbol) = 0;
-  MSYMBOL_SIZE (msymbol) = 0;
+  /* Do not use the SET_MSYMBOL_SIZE macro to initialize the size,
+     as it would also set the has_size flag.  */
+  msymbol->size = 0;
 
   /* The hash pointers must be cleared! If they're not,
      add_minsym_to_hash_table will NOT add this msymbol to the hash table.  */
diff --git a/gdb/printcmd.c b/gdb/printcmd.c
index d5b5b63122a..9e8cd659cad 100644
--- a/gdb/printcmd.c
+++ b/gdb/printcmd.c
@@ -680,6 +680,7 @@ build_address_symbolic (struct gdbarch *gdbarch,
     }
 
   if (msymbol != NULL
+      && MSYMBOL_HAS_SIZE (msymbol)
       && MSYMBOL_SIZE (msymbol) == 0
       && MSYMBOL_TYPE (msymbol) != mst_text
       && MSYMBOL_TYPE (msymbol) != mst_text_gnu_ifunc
diff --git a/gdb/symtab.h b/gdb/symtab.h
index 76120a37a93..041d8cf199b 100644
--- a/gdb/symtab.h
+++ b/gdb/symtab.h
@@ -348,6 +348,11 @@ struct minimal_symbol
   unsigned int target_flag_1 : 1;
   unsigned int target_flag_2 : 1;
 
+  /* Nonzero iff the size of the minimal symbol has been set.
+     Symbol size information can sometimes not be determined, because
+     the object file format may not carry that piece of information.  */
+  unsigned int has_size : 1;
+
   /* Minimal symbols with the same hash key are kept on a linked
      list.  This is the link.  */
 
@@ -361,7 +366,14 @@ struct minimal_symbol
 
 #define MSYMBOL_TARGET_FLAG_1(msymbol)  (msymbol)->target_flag_1
 #define MSYMBOL_TARGET_FLAG_2(msymbol)  (msymbol)->target_flag_2
-#define MSYMBOL_SIZE(msymbol)		(msymbol)->size
+#define MSYMBOL_SIZE(msymbol)		((msymbol)->size + 0)
+#define SET_MSYMBOL_SIZE(msymbol, sz)		\
+  do						\
+    {						\
+      (msymbol)->size = sz;			\
+      (msymbol)->has_size = 1;			\
+    } while (0)
+#define MSYMBOL_HAS_SIZE(msymbol)	((msymbol)->has_size + 0)
 #define MSYMBOL_TYPE(msymbol)		(msymbol)->type
 
 #include "minsyms.h"