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-rw-r--r--sysdeps/unix/sysv/linux/init-first.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/init-first.h b/sysdeps/unix/sysv/linux/init-first.h
new file mode 100644
index 0000000000..dd4f85af9d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/init-first.h
@@ -0,0 +1,31 @@
+/* The job of this fragment it to find argc and friends for INIT.
+   This is done in one of two ways: either in the stack context
+   of program start, or having dlopen pass them in.  */
+
+#define SYSDEP_CALL_INIT(NAME, INIT)					      \
+void NAME (void *arg)							      \
+{									      \
+  int argc;								      \
+  char **argv, **envp;							      \
+  /* The next variable is only here to work around a bug in gcc <= 2.7.2.1.   \
+     If the address would be taken inside the expression the optimizer	      \
+     would try to be too smart and throws it away.  Grrr.  */		      \
+  int *dummy_addr = &_dl_starting_up;					      \
+									      \
+  __libc_multiple_libcs = dummy_addr && !_dl_starting_up;		      \
+									      \
+  if (!__libc_multiple_libcs)						      \
+    {									      \
+      argc = (int) arg;							      \
+      argv = (char **) &arg + 1;					      \
+      envp = &argv[argc+1];						      \
+    }									      \
+  else									      \
+    {									      \
+      argc = (int) arg;							      \
+      argv = ((char ***) &arg)[1];					      \
+      envp = ((char ***) &arg)[2];					      \
+    }									      \
+									      \
+  INIT (argc, argv, envp);						      \
+}