Patch from Martin Proulx <mproulx@okiok.com> to support

the i960 architecture.

1 files changed, 49 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/i960/crt0.S b/libc/sysdeps/linux/i960/crt0.S
new file mode 100644
index 000000000..b235e5c50
--- /dev/null
+++ b/libc/sysdeps/linux/i960/crt0.S
@@ -0,0 +1,49 @@
+#
+# clone.S, part of the i960 support for the uClibc library.
+#
+# Copyright (C) 2002 by Okiok Data Ltd.  http://www.okiok.com/
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Library General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option) any
+# later version.
+#
+# This program 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 Library General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Library General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# at 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+
+/*
+ *        
+ * The behavior in this file is tightly coupled with how the linux kernel sets things up
+ * on the stack before calling us.
+ *
+ * Currently fs/binfmt_flat.c (for STACK_GROWS_UP) and arch/i960/kernel/process.c
+ * build things so that a pointer to argc is left in g13 by start_thread().
+ *
+ * ^
+ * |                        <- sp somewhere around here, after being aligned.
+ * |        
+ * |envp    -> envp[0]
+ * |argv    -> argv[0]
+ * |argc                    <- g13
+ *
+ * A complete picture of how things are set up can be seen in the comments of
+ * create_flat_tables_stack_grows_up in fs/binfmt_flat.c
+ *
+ * I believe having to use this register could probably be avoided.
+ *        
+ */
+        
+        .globl  start
+start:
+        mov     g13, r3
+        ldt     (r3), g0
+        callx   ___uClibc_main
+        
+/* We might want to add some instruction so that it crashes if main returns */