csu: Move calling main out of __libc_start_main_impl

This code depends on whether glibc has unwinding support for
a particular port.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/sysdeps/generic/libc_start_call_main.h b/sysdeps/generic/libc_start_call_main.h
new file mode 100644
index 0000000000..8a06eec4a3
--- /dev/null
+++ b/sysdeps/generic/libc_start_call_main.h
@@ -0,0 +1,24 @@
+/* Invoking main from __libc_start.  Generic version without unwinding.
+   Copyright (C) 1998-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+_Noreturn static __always_inline void
+__libc_start_call_main (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
+                        int argc, char **argv MAIN_AUXVEC_DECL)
+{
+  exit (main (argc, argv, __environ MAIN_AUXVEC_PARAM));
+}