diff --git a/libc/arch-x86/bionic/crtend_so.S b/libc/arch-x86/bionic/crtend_so.S
new file mode 100644
index 0000000..7fb2280
--- /dev/null
+++ b/libc/arch-x86/bionic/crtend_so.S
@@ -0,0 +1,47 @@
+.text
+.align 4
+.type __bionic_call_ctors, @function
+
+/*
+ * The CTORS_LIST is marked by -1 (start) and 0 (end).
+ * We mark the end of the .ctors section with the __CTOR_END__ section so
+ * that we can just iterate backwards from it until we hit -1 and execute
+ * all the function pointers. This seems to be the way to do it for SVR4
+ * derived systems.
+ */
+__bionic_call_ctors:
+    pushl  %esi
+    mov    $__CTOR_END__, %esi
+
+0:
+    /* now grab the next function pointer and check if its -1. If not,
+     * call it, otherwise we're done. We use %esi since it's callee saved.
+     */
+    subl    $4, %esi
+    mov     (%esi), %eax
+    cmp     $0xffffffff, %eax
+    je      1f
+    call    *%eax
+    jmp     0b
+
+1:
+    /* we're done */
+    popl    %esi
+    ret
+
+.section .init
+.align 4
+    call __bionic_call_ctors
+    ret
+
+.section .ctors, "aw", @progbits
+.align 4
+.type __CTOR_END__, @object
+__CTOR_END__:
+    .long 0
+
+.section .init_array, "aw"
+    .long 0
+
+.section .fini_array, "aw"
+    .long 0