1 files changed, 24 insertions, 0 deletions

diff --git a/arch/h8300/kernel/sys_h8300.c b/arch/h8300/kernel/sys_h8300.c
index 0f61b7ad69ab..302a2dfe634a 100644
--- a/arch/h8300/kernel/sys_h8300.c
+++ b/arch/h8300/kernel/sys_h8300.c
@@ -25,6 +25,7 @@
 #include <asm/cachectl.h>
 #include <asm/traps.h>
 #include <asm/ipc.h>
+#include <asm/unistd.h>
 
 /*
  * sys_pipe() is the normal C calling standard for creating
@@ -280,3 +281,26 @@ asmlinkage void syscall_print(void *dummy,...)
                ((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
 }
 #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 res __asm__("er0");
+        register const char * _a __asm__("er1") = filename;
+        register void *_b __asm__("er2") = argv;
+        register void *_c __asm__("er3") = envp;
+        __asm__ __volatile__ ("mov.l %1,er0\n\t"
+                        "trapa  #0\n\t"
+                        : "=r" (res)
+                        : "g" (__NR_execve),
+                          "g" (_a),
+                          "g" (_b),
+                          "g" (_c)
+                        : "cc", "memory");
+        return res;
+}
+
+