From: whitequark <whitequark@whitequark.org>
Date: Sun, 2 Aug 2015 02:49:15 +0000 (+0300)
Subject: libdyld: handle existing but undefined symbols during lookup.
X-Git-Tag: 24jan2021_ls180~2157
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6a1b0b342c9e9c94f36a27550ea1ba8aee1c8ed8;p=litex.git

libdyld: handle existing but undefined symbols during lookup.
---

diff --git a/software/libdyld/dyld.c b/software/libdyld/dyld.c
index 112f2e04..da531b6d 100644
--- a/software/libdyld/dyld.c
+++ b/software/libdyld/dyld.c
@@ -171,5 +171,9 @@ void *dyld_lookup(const char *symbol, struct dyld_info *info) {
         index = info->hash.chain[index];
     }
 
-    return (void*)(info->base + info->symtab[index].st_value);
+    Elf32_Addr value = info->symtab[index].st_value;
+    if(value != 0)
+        return (void*)(info->base + value);
+    else
+        return NULL;
 }