1 files changed, 16 insertions, 13 deletions

diff --git a/arch/um/include/sysdep-i386/stub.h b/arch/um/include/sysdep-i386/stub.h
index 6ba8cbbe0d36..b492b12b4a10 100644
--- a/arch/um/include/sysdep-i386/stub.h
+++ b/arch/um/include/sysdep-i386/stub.h
@@ -6,8 +6,12 @@
 #ifndef __SYSDEP_STUB_H
 #define __SYSDEP_STUB_H
 
+#include <sys/mman.h>
 #include <asm/ptrace.h>
 #include <asm/unistd.h>
+#include "stub-data.h"
+#include "kern_constants.h"
+#include "uml-config.h"
 
 extern void stub_segv_handler(int sig);
 extern void stub_clone_handler(void);
@@ -76,23 +80,22 @@ static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
         return ret;
 }
 
-static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3,
-                                 long arg4, long arg5, long arg6)
+static inline void trap_myself(void)
 {
-        long ret;
-
-        __asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; "
-                        "int $0x80 ; pop %%ebp"
-                        : "=a" (ret)
-                        : "g" (syscall), "b" (arg1), "c" (arg2), "d" (arg3),
-                          "S" (arg4), "D" (arg5), "0" (arg6));
-
-        return ret;
+        __asm("int3");
 }
 
-static inline void trap_myself(void)
+static inline void remap_stack(int fd, unsigned long offset)
 {
-        __asm("int3");
+        __asm__ volatile ("movl %%eax,%%ebp ; movl %0,%%eax ; int $0x80 ;"
+                          "movl %7, %%ebx ; movl %%eax, (%%ebx)"
+                          : : "g" (STUB_MMAP_NR), "b" (UML_CONFIG_STUB_DATA), 
+                            "c" (UM_KERN_PAGE_SIZE), 
+                            "d" (PROT_READ | PROT_WRITE),
+                            "S" (MAP_FIXED | MAP_SHARED), "D" (fd), 
+                            "a" (offset), 
+                            "i" (&((struct stub_data *) UML_CONFIG_STUB_DATA)->err) 
+                          : "memory");
 }
 
 #endif