1 files changed, 88 insertions, 0 deletions
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
new file mode 100644
index 00000000..6cade936
--- /dev/null
+++ b/arch/um/kernel/exec.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/stddef.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <asm/current.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+#include "as-layout.h"
+#include "mem_user.h"
+#include "skas.h"
+#include "os.h"
+#include "internal.h"
+
+void flush_thread(void)
+{
+	void *data = NULL;
+	int ret;
+
+	arch_flush_thread(&current->thread.arch);
+
+	ret = unmap(&current->mm->context.id, 0, STUB_START, 0, &data);
+	ret = ret || unmap(&current->mm->context.id, STUB_END,
+			   host_task_size - STUB_END, 1, &data);
+	if (ret) {
+		printk(KERN_ERR "flush_thread - clearing address space failed, "
+		       "err = %d\n", ret);
+		force_sig(SIGKILL, current);
+	}
+
+	__switch_mm(&current->mm->context.id);
+}
+
+void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
+{
+	PT_REGS_IP(regs) = eip;
+	PT_REGS_SP(regs) = esp;
+}
+EXPORT_SYMBOL(start_thread);
+
+static long execve1(const char *file,
+		    const char __user *const __user *argv,
+		    const char __user *const __user *env)
+{
+	long error;
+
+	error = do_execve(file, argv, env, &current->thread.regs);
+	if (error == 0) {
+		task_lock(current);
+		current->ptrace &= ~PT_DTRACE;
+#ifdef SUBARCH_EXECVE1
+		SUBARCH_EXECVE1(&current->thread.regs.regs);
+#endif
+		task_unlock(current);
+	}
+	return error;
+}
+
+long um_execve(const char *file, const char __user *const __user *argv, const char __user *const __user *env)
+{
+	long err;
+
+	err = execve1(file, argv, env);
+	if (!err)
+		UML_LONGJMP(current->thread.exec_buf, 1);
+	return err;
+}
+
+long sys_execve(const char __user *file, const char __user *const __user *argv,
+		const char __user *const __user *env)
+{
+	long error;
+	char *filename;
+
+	filename = getname(file);
+	error = PTR_ERR(filename);
+	if (IS_ERR(filename)) goto out;
+	error = execve1(filename, argv, env);
+	putname(filename);
+ out:
+	return error;
+}