1 files changed, 19 insertions, 0 deletions

diff --git a/arch/sh64/kernel/sys_sh64.c b/arch/sh64/kernel/sys_sh64.c
index c6de1a95af44..ad0fa4e003e7 100644
--- a/arch/sh64/kernel/sys_sh64.c
+++ b/arch/sh64/kernel/sys_sh64.c
@@ -32,6 +32,7 @@
 #include <asm/uaccess.h>
 #include <asm/ipc.h>
 #include <asm/ptrace.h>
+#include <asm/unistd.h>
 
 #define REG_3   3
 
@@ -283,3 +284,21 @@ asmlinkage int sys_uname(struct old_utsname * name)
         up_read(&uts_sem);
         return err?-EFAULT:0;
 }
+
+/*
+ * 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 unsigned long __sc0 __asm__ ("r9") = ((0x13 << 16) | __NR_execve);
+        register unsigned long __sc2 __asm__ ("r2") = (unsigned long) filename;
+        register unsigned long __sc3 __asm__ ("r3") = (unsigned long) argv;
+        register unsigned long __sc4 __asm__ ("r4") = (unsigned long) envp;
+        __asm__ __volatile__ ("trapa    %1 !\t\t\t execve(%2,%3,%4)"
+        : "=r" (__sc0)
+        : "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4) );
+        __asm__ __volatile__ ("!dummy   %0 %1 %2 %3"
+        : : "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4) : "memory");
+        return __sc0;
+}