From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/alpha/kernel/binfmt_loader.c | 52 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 arch/alpha/kernel/binfmt_loader.c

(limited to 'arch/alpha/kernel/binfmt_loader.c')

diff --git a/arch/alpha/kernel/binfmt_loader.c b/arch/alpha/kernel/binfmt_loader.c
new file mode 100644
index 000000000..9525660c9
--- /dev/null
+++ b/arch/alpha/kernel/binfmt_loader.c
@@ -0,0 +1,52 @@
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/mm_types.h>
+#include <linux/binfmts.h>
+#include <linux/a.out.h>
+
+static int load_binary(struct linux_binprm *bprm)
+{
+	struct exec *eh = (struct exec *)bprm->buf;
+	unsigned long loader;
+	struct file *file;
+	int retval;
+
+	if (eh->fh.f_magic != 0x183 || (eh->fh.f_flags & 0x3000) != 0x3000)
+		return -ENOEXEC;
+
+	if (bprm->loader)
+		return -ENOEXEC;
+
+	allow_write_access(bprm->file);
+	fput(bprm->file);
+	bprm->file = NULL;
+
+	loader = bprm->vma->vm_end - sizeof(void *);
+
+	file = open_exec("/sbin/loader");
+	retval = PTR_ERR(file);
+	if (IS_ERR(file))
+		return retval;
+
+	/* Remember if the application is TASO.  */
+	bprm->taso = eh->ah.entry < 0x100000000UL;
+
+	bprm->file = file;
+	bprm->loader = loader;
+	retval = prepare_binprm(bprm);
+	if (retval < 0)
+		return retval;
+	return search_binary_handler(bprm);
+}
+
+static struct linux_binfmt loader_format = {
+	.load_binary	= load_binary,
+};
+
+static int __init init_loader_binfmt(void)
+{
+	insert_binfmt(&loader_format);
+	return 0;
+}
+arch_initcall(init_loader_binfmt);
-- 
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