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authorRich Felker <dalias@aerifal.cx>2011-02-12 00:22:29 -0500
committerRich Felker <dalias@aerifal.cx>2011-02-12 00:22:29 -0500
commit0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 (patch)
tree6eaef0d8a720fa3da580de87b647fff796fe80b3 /src/env/__libc_start_main.c
downloadmusl-0b44a0315b47dd8eced9f3b7f31580cf14bbfc01.tar.gz
initial check-in, version 0.5.0v0.5.0
Diffstat (limited to 'src/env/__libc_start_main.c')
-rw-r--r--src/env/__libc_start_main.c26
1 files changed, 26 insertions, 0 deletions
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;
+}