From: Ivan Maidanski <ivmai@mail.ru>
Date: Wed, 17 Oct 2012 17:44:24 +0000 (+0400)
Subject: Add comment for _DYNAMIC[] compared to NULL in GC_FirstDLOpenedLinkMap
X-Git-Tag: gc7_4_0~199
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=630803c5ee009137cae22ee89a253c503414ec65;p=gc

Add comment for _DYNAMIC[] compared to NULL in GC_FirstDLOpenedLinkMap

* dyn_load.c (GC_FirstDLOpenedLinkMap): Add comment for
_DYNAMIC-is-NULL code branch; cast _DYNAMIC (array symbol) to ptr_t
in comparison to NULL (0).
---

diff --git a/dyn_load.c b/dyn_load.c
index c44669d9..708667f8 100644
--- a/dyn_load.c
+++ b/dyn_load.c
@@ -151,7 +151,8 @@ GC_FirstDLOpenedLinkMap(void)
         dynStructureAddr = &_DYNAMIC;
 #   endif
 
-    if( dynStructureAddr == 0) {
+    if (dynStructureAddr == 0) {
+        /* _DYNAMIC symbol not resolved. */
         return(0);
     }
     if( cachedResult == 0 ) {
@@ -640,7 +641,8 @@ GC_FirstDLOpenedLinkMap(void)
     ElfW(Dyn) *dp;
     static struct link_map *cachedResult = 0;
 
-    if( _DYNAMIC == 0) {
+    if (0 == (ptr_t)_DYNAMIC) {
+        /* _DYNAMIC symbol not resolved. */
         return(0);
     }
     if( cachedResult == 0 ) {