From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/env/__libc_start_main.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 src/env/__libc_start_main.c (limited to 'src/env/__libc_start_main.c') diff --git a/src/env/__libc_start_main.c b/src/env/__libc_start_main.c new file mode 100644 index 00000000..70af77b5 --- /dev/null +++ b/src/env/__libc_start_main.c @@ -0,0 +1,26 @@ +#include "libc.h" + +/* Any use of __environ/environ will override this symbol. */ +char **__dummy_environ = (void *)-1; +weak_alias(__dummy_environ, ___environ); + +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; +} -- cgit v1.2.1