1 files changed, 30 insertions, 0 deletions
diff --git a/05/musl-0.6.0/src/env/__libc_start_main.c b/05/musl-0.6.0/src/env/__libc_start_main.c
new file mode 100644
index 0000000..d4f360e
--- /dev/null
+++ b/05/musl-0.6.0/src/env/__libc_start_main.c
@@ -0,0 +1,30 @@
+#include "libc.h"
+
+#if 0
+/* Any use of __environ/environ will override this symbol. */
+char **__dummy_environ = (void *)-1;
+weak_alias(__dummy_environ, ___environ);
+#else
+extern char **___environ;
+#endif
+
+int __libc_start_main(
+	int (*main)(int, char **, char **), int argc, char **argv,
+	int (*init)(int, char **, char **), void (*fini)(void),
+	void (*ldso_fini)(void))
+{
+	/* Save the environment if it may be used by libc/application */
+	char **envp = argv+argc+1;
+	if (___environ != (void *)-1) ___environ = envp;
+
+	/* Avoid writing 0 and triggering unnecessary COW */
+	if (ldso_fini) libc.ldso_fini = ldso_fini;
+	if (fini) libc.fini = fini;
+
+	/* Execute constructors (static) linked into the application */
+	if (init) init(argc, argv, envp);
+
+	/* Pass control to to application */
+	exit(main(argc, argv, envp));
+	return 0;
+}