From 759515c26a8aa034b9c3f4b6dfd3b187df48883c Mon Sep 17 00:00:00 2001
From: Glenn L McGrath <bug1@ihug.co.nz>
Date: Sat, 30 Aug 2003 06:00:33 +0000
Subject: handle GPLONLY symbols

---
 modutils/insmod.c | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

(limited to 'modutils/insmod.c')

diff --git a/modutils/insmod.c b/modutils/insmod.c
index c5cab1997..4676b5aa8 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -253,7 +253,7 @@
 #ifndef MODUTILS_MODULE_H
 static const int MODUTILS_MODULE_H = 1;
 
-#ident "$Id: insmod.c,v 1.100 2003/08/13 19:56:33 andersen Exp $"
+#ident "$Id: insmod.c,v 1.101 2003/08/30 06:00:33 bug1 Exp $"
 
 /* This file contains the structures used by the 2.0 and 2.1 kernels.
    We do not use the kernel headers directly because we do not wish
@@ -474,7 +474,7 @@ int delete_module(const char *);
 #ifndef MODUTILS_OBJ_H
 static const int MODUTILS_OBJ_H = 1;
 
-#ident "$Id: insmod.c,v 1.100 2003/08/13 19:56:33 andersen Exp $"
+#ident "$Id: insmod.c,v 1.101 2003/08/30 06:00:33 bug1 Exp $"
 
 /* The relocatable object is manipulated using elfin types.  */
 
@@ -650,6 +650,8 @@ static enum obj_reloc arch_apply_relocation (struct obj_file *f,
 
 static void arch_create_got (struct obj_file *f);
 
+static int obj_gpl_license(struct obj_file *f, const char **license);
+	
 #ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE
 static int arch_init_module (struct obj_file *f, struct new_module *);
 #endif
@@ -660,7 +662,6 @@ static int arch_init_module (struct obj_file *f, struct new_module *);
 //----------------------------------------------------------------------------
 
 
-
 /* SPFX is always a string, so it can be concatenated to string constants.  */
 #ifdef SYMBOL_PREFIX
 #define SPFX	SYMBOL_PREFIX
@@ -1927,11 +1928,14 @@ add_symbols_from(
 	struct new_module_symbol *s;
 	size_t i;
 	int used = 0;
+	int gpl;
 #ifdef SYMBOL_PREFIX
 	char *name_buf = 0;
 	size_t name_alloced_size = 0;
 #endif
 
+	gpl = obj_gpl_license(f, NULL) == 0;
+
 	for (i = 0, s = syms; i < nsyms; ++i, ++s) {
 		/* Only add symbols that are already marked external.
 		   If we override locals we may cause problems for
@@ -1940,6 +1944,19 @@ add_symbols_from(
 		struct obj_symbol *sym;
 		char *name = (char *)s->name;
 
+		/* GPL licensed modules can use symbols exported with
+		 * EXPORT_SYMBOL_GPL, so ignore any GPLONLY_ prefix on the
+		 * exported names.  Non-GPL modules never see any GPLONLY_
+		 * symbols so they cannot fudge it by adding the prefix on
+		 * their references.
+		 */
+		if (strncmp((char *)s->name, "GPLONLY_", 8) == 0) {
+			if (gpl)
+				((char *)s->name) += 8;
+			else
+				continue;
+		}
+
 #ifdef SYMBOL_PREFIX
 		/* Prepend SYMBOL_PREFIX to the symbol's name (the
 		   kernel exports `C names', but module object files
@@ -3612,6 +3629,7 @@ static void hide_special_symbols(struct obj_file *f)
 				ELFW(ST_INFO) (STB_LOCAL, ELFW(ST_TYPE) (sym->info));
 }
 
+
 #ifdef CONFIG_FEATURE_CHECK_TAINTED_MODULE
 static int obj_gpl_license(struct obj_file *f, const char **license)
 {
-- 
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