[patch] glibc-2.26-no-memcpy-ifunc.patch

glibc-2.26-no-memcpy-ifunc.patch (text/plain), 854 bytes, created by Sergei Trofimovich (RETIRED) on 2017-12-20 16:16:43 UTC

diff --git a/csu/libc-tls.c b/csu/libc-tls.c
index 3c897bf28b..aed66f6f95 100644
--- a/csu/libc-tls.c
+++ b/csu/libc-tls.c
@@ -102,4 +102,10 @@ init_static_tls (size_t memsz, size_t align)
 }
 
+static void silly_slow_memcpy(char * dst, const char * src, size_t sz) {
+  for (size_t i = 0; i < sz; ++i) {
+    dst[i] = src[i];
+  }
+}
+
 void
 __libc_setup_tls (void)
@@ -176,7 +182,9 @@ __libc_setup_tls (void)
 # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
 #endif
+
   _dl_static_dtv[2].pointer.to_free = NULL;
   /* sbrk gives us zero'd memory, so we don't need to clear the remainder.  */
-  memcpy (_dl_static_dtv[2].pointer.val, initimage, filesz);
+  //memcpy (_dl_static_dtv[2].pointer.val, initimage, filesz);
+  silly_slow_memcpy(_dl_static_dtv[2].pointer.val, initimage, filesz);
 
   /* Install the pointer to the dtv.  */