1 files changed, 10 insertions, 3 deletions

diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 29dec080a604..12ecc817be3f 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -112,8 +112,8 @@ common_invalid:
 #define SPFIX(code...)
 #endif
 
-        .macro  svc_entry
-        sub     sp, sp, #S_FRAME_SIZE
+        .macro  svc_entry, stack_hole=0
+        sub     sp, sp, #(S_FRAME_SIZE + \stack_hole)
  SPFIX( tst     sp, #4          )
  SPFIX( bicne   sp, sp, #4      )
         stmib   sp, {r1 - r12}
@@ -121,7 +121,7 @@ common_invalid:
         ldmia   r0, {r1 - r3}
         add     r5, sp, #S_SP           @ here for interlock avoidance
         mov     r4, #-1                 @  ""  ""      ""       ""
-        add     r0, sp, #S_FRAME_SIZE   @  ""  ""      ""       ""
+        add     r0, sp, #(S_FRAME_SIZE + \stack_hole)
  SPFIX( addne   r0, r0, #4      )
         str     r1, [sp]                @ save the "real" r0 copied
                                         @ from the exception stack
@@ -242,7 +242,14 @@ svc_preempt:
 
         .align  5
 __und_svc:
+#ifdef CONFIG_KPROBES
+        @ If a kprobe is about to simulate a "stmdb sp..." instruction,
+        @ it obviously needs free stack space which then will belong to
+        @ the saved context.
+        svc_entry 64
+#else
         svc_entry
+#endif
 
         @
         @ call emulation code, which returns using r9 if it has emulated