1 files changed, 17 insertions, 0 deletions

diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c
index 11c2acde6eaa..8fde95001c34 100644
--- a/arch/sh/kernel/sys_sh.c
+++ b/arch/sh/kernel/sys_sh.c
@@ -25,6 +25,7 @@
 #include <asm/cacheflush.h>
 #include <asm/uaccess.h>
 #include <asm/ipc.h>
+#include <asm/unistd.h>
 
 /*
  * sys_pipe() is the normal C calling standard for creating
@@ -309,3 +310,19 @@ asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
                                 (u64)len0 << 32 | len1, advice);
 #endif
 }
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename, char *const argv[], char *const envp[])
+{
+        register long __sc0 __asm__ ("r3") = __NR_execve;
+        register long __sc4 __asm__ ("r4") = (long) filename;
+        register long __sc5 __asm__ ("r5") = (long) argv;
+        register long __sc6 __asm__ ("r6") = (long) envp;
+        __asm__ __volatile__ ("trapa    #0x13" : "=z" (__sc0)
+                        : "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6)
+                        : "memory");
+        return __sc0;
+}