Apply patch from Thomas de Lellis to allow nm to distinguish between weak

function symbols and weak data symbols.

bfd/ChangeLog

@@ -1,5 +1,23 @@
-2000-01-27  Thomas de Lellis  <tdel@wrs.com>
+2000-01-27  Thomas de Lellis  <tdel@windriver.com>
 
+        * syms.c (bfd_decode_symclass)
+        Two new class characters were added - 'V' and 'v'.  The
+        meaning of 'W' is now restricted to just weak non-object
+        symbols.  This allows differentiation between, for example,
+        weak functions vs weak objects.  nm for example now dumps:
+        'W' = weak global
+        'w' = weak unresolved
+        'V' = weak global object
+        'v' = weak unresolved object
+
+	(bfd_is_undefined_symclass): New function.  Return true if the
+	given symbol class represents and undefined/unresolved symbol.
+	
+        (bfd_symbol_info): Use bfd_is_undefined_symclass to check for
+	unresolved symbols.
+
+	* bfd-in2.h: Add prototype for bfd_is_undefined_symbol().
+	
         * elf32-arm.h (elf32_arm_get_symbol_type): If a symbol has the
 	STT_ARM_16BIT flag set, but it is not attached to a data object
 	return STT_ARM_16BIT so that it will be treated as code by the

bfd/bfd-in2.h

@@ -2433,6 +2433,9 @@ bfd_print_symbol_vandf PARAMS ((PTR file, asymbol *symbol));
 int 
 bfd_decode_symclass PARAMS ((asymbol *symbol));
 
+boolean
+bfd_is_undefined_symclass PARAMS ((int symclass));
+
 void 
 bfd_symbol_info PARAMS ((asymbol *symbol, symbol_info *ret));
 

bfd/syms.c

@@ -584,14 +584,28 @@ bfd_decode_symclass (symbol)
   if (bfd_is_und_section (symbol->section))
     {
       if (symbol->flags & BSF_WEAK)
-	return 'w';
+	{
+	  /* If weak, determine if it's specifically an object
+	     or non-object weak.  */
+	  if (symbol->flags & BSF_OBJECT)
+	    return 'v';
+	  else
+	    return 'w';
+	}
       else
 	return 'U';
     }
   if (bfd_is_ind_section (symbol->section))
     return 'I';
   if (symbol->flags & BSF_WEAK)
-    return 'W';
+    {
+      /* If weak, determine if it's specifically an object
+	 or non-object weak.  */
+      if (symbol->flags & BSF_OBJECT)
+	return 'V';
+      else
+	return 'W';
+    }
   if (!(symbol->flags & (BSF_GLOBAL | BSF_LOCAL)))
     return '?';
 
@@ -615,6 +629,26 @@ bfd_decode_symclass (symbol)
      */
 }
 
+/*
+FUNCTION
+	bfd_is_undefined_symclass 
+
+DESCRIPTION
+	Returns non-zero if the class symbol returned by
+	bfd_decode_symclass represents an undefined symbol.
+	Returns zero otherwise.
+
+SYNOPSIS
+	boolean bfd_is_undefined_symclass (int symclass);
+*/
+
+boolean
+bfd_is_undefined_symclass (symclass)
+     int symclass;
+{
+  return symclass == 'U' || symclass == 'w' || symclass == 'v';
+}
+
 /*
 FUNCTION
 	bfd_symbol_info
@@ -634,10 +668,12 @@ bfd_symbol_info (symbol, ret)
      symbol_info *ret;
 {
   ret->type = bfd_decode_symclass (symbol);
-  if (ret->type != 'U' && ret->type != 'w')
+  
-    ret->value = symbol->value + symbol->section->vma;
+  if (bfd_is_undefined_symclass (ret->type))
-  else
     ret->value = 0;
+  else
+    ret->value = symbol->value + symbol->section->vma;
+  
   ret->name = symbol->name;
 }
 

binutils/ChangeLog

@@ -1,3 +1,12 @@
+2000-27-01  Thomas de Lellis  <tdel@windriver.com>
+
+        * nm.c (print_symbol_info_bsd): Use bfd_is_undefined_symclass to
+	check to unresolved symbols.
+        (print_symbol_info_sysv):  Ditto.
+        (print_symbol_info_posix):  Ditto.
+
+        * binutils.texi: Document new 'V' symclass flag for nm.
+
 2000-01-27  Nick Clifton  <nickc@redhat.com>
 
 	* binutils.texi (objdump): Document new ARM specific

binutils/binutils.texi

@@ -700,11 +700,18 @@ The symbol is in the text (code) section.
 @item U
 The symbol is undefined.
 
+@item V
+The symbol is a weak object.  When a weak defined symbol is linked with
+a normal defined symbol, the normal defined symbol is used with no error.
+When a weak undefined symbol is linked and the symbol is not defined,
+the value of the weak symbol becomes zero with no error.
+
 @item W
-The symbol is weak.  When a weak defined symbol is linked with a normal
+The symbol is a weak symbol that has not been specifically tagged as a
-defined symbol, the normal defined symbol is used with no error.  When a
+weak object symbol.  When a weak defined symbol is linked with a normal
-weak undefined symbol is linked and the symbol is not defined, the value
+defined symbol, the normal defined symbol is used with no error.
-of the weak symbol becomes zero with no error.
+When a weak undefined symbol is linked and the symbol is not defined,
+the value of the weak symbol becomes zero with no error.
 
 @item -
 The symbol is a stabs symbol in an a.out object file.  In this case, the

binutils/nm.c

@@ -1427,7 +1427,7 @@ print_symbol_info_bsd (info, abfd)
      symbol_info *info;
      bfd *abfd;
 {
-  if (info->type == 'U' || info->type == 'w')
+  if (bfd_is_undefined_symclass (info->type))
     {
       printf ("%*s",
 #ifdef BFD64
@@ -1458,7 +1458,7 @@ print_symbol_info_sysv (info, abfd)
      bfd *abfd;
 {
   print_symname ("%-20s|", info->name, abfd);	/* Name */
-  if (info->type == 'U' || info->type == 'w')
+  if (bfd_is_undefined_symclass (info->type))
     printf ("        ");	/* Value */
   else
     print_value (info->value);
@@ -1481,7 +1481,7 @@ print_symbol_info_posix (info, abfd)
 {
   print_symname ("%s ", info->name, abfd);
   printf ("%c ", info->type);
-  if (info->type == 'U' || info->type == 'w')
+  if (bfd_is_undefined_symclass (info->type))
     printf ("        ");
   else
     print_value (info->value);