2 files changed, 25 insertions, 0 deletions

diff --git a/lib/Makefile b/lib/Makefile
index ddf3e676e1f4..4d752be0edc0 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -35,6 +35,8 @@ ifneq ($(CONFIG_HAVE_DEC_LOCK),y)
   lib-y += dec_and_lock.o
 endif
 
+lib-y += execve.o
+
 obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
 obj-$(CONFIG_CRC16)     += crc16.o
 obj-$(CONFIG_CRC32)     += crc32.o
diff --git a/lib/execve.c b/lib/execve.c
new file mode 100644
index 000000000000..2667ebc15045
--- /dev/null
+++ b/lib/execve.c
@@ -0,0 +1,23 @@
+#include <asm/bug.h>
+#include <asm/uaccess.h>
+
+#define __KERNEL_SYSCALLS__
+static int errno __attribute__((unused));
+#include <asm/unistd.h>
+
+#ifdef _syscall3
+int kernel_execve (const char *filename, char *const argv[], char *const envp[])
+                                                                __attribute__((__weak__));
+int kernel_execve (const char *filename, char *const argv[], char *const envp[])
+{
+        mm_segment_t fs = get_fs();
+        int ret;
+
+        WARN_ON(segment_eq(fs, USER_DS));
+        ret = execve(filename, (char **)argv, (char **)envp);
+        if (ret)
+                ret = -errno;
+
+        return ret;
+}
+#endif