Move __cxa_thread_atexit* to its own .c file to avoid pulling the code

(w/ _dlctl reference) into static executables.  It's all Mark's code so
put his preferred copyright on it.

ok kettenis@

1 files changed, 3 insertions, 36 deletions

diff --git a/src/lib/libc/stdlib/atexit.c b/src/lib/libc/stdlib/atexit.c
index fe4d5bc79f..ea9dd129c1 100644
--- a/src/lib/libc/stdlib/atexit.c
+++ b/src/lib/libc/stdlib/atexit.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: atexit.c,v 1.26 2017/12/05 21:11:10 kettenis Exp $ */
+/*      $OpenBSD: atexit.c,v 1.27 2017/12/16 20:06:56 guenther Exp $ */
 /*
  * Copyright (c) 2002 Daniel Hartmeier
  * All rights reserved.
@@ -31,24 +31,14 @@
 
 #include <sys/types.h>
 #include <sys/mman.h>
-#include <dlfcn.h>
-#include <elf.h>
-#pragma weak _DYNAMIC
 #include <stdlib.h>
 #include <string.h>
+#include <tib.h>
 #include <unistd.h>
+
 #include "atexit.h"
 #include "atfork.h"
 #include "thread_private.h"
-#include "tib.h"
-
-typeof(dlctl) dlctl asm("_dlctl") __attribute__((weak));
-
-struct thread_atexit_fn {
-        void (*func)(void *);
-        void *arg;
-        struct thread_atexit_fn *next;
-};
 
 struct atexit *__atexit;
 static int restartloop;
@@ -133,29 +123,6 @@ atexit(void (*fn)(void))
 }
 DEF_STRONG(atexit);
 
-__weak_alias(__cxa_thread_atexit, __cxa_thread_atexit_impl);
-
-int
-__cxa_thread_atexit_impl(void (*func)(void *), void *arg, void *dso)
-{
-        struct thread_atexit_fn *fnp;
-        struct tib *tib = TIB_GET();
-
-        fnp = calloc(1, sizeof(struct thread_atexit_fn));
-        if (fnp == NULL)
-                return -1;
-
-        if (_DYNAMIC)
-                dlctl(NULL, DL_REFERENCE, dso);
-
-        fnp->func = func;
-        fnp->arg = arg;
-        fnp->next = tib->tib_atexit;
-        tib->tib_atexit = fnp;
-
-        return 0;
-}
-
 void
 _thread_finalize(void)
 {