1 files changed, 29 insertions, 0 deletions

diff --git a/arch/alpha/lib/dbg_current.S b/arch/alpha/lib/dbg_current.S
new file mode 100644
index 000000000000..e6d071015f9b
--- /dev/null
+++ b/arch/alpha/lib/dbg_current.S
@@ -0,0 +1,29 @@
+/*
+ * arch/alpha/lib/dbg_current.S
+ * Contributed by Richard Henderson (rth@cygnus.com)
+ *
+ * Trap if we find current not correct.
+ */
+
+#include <asm/pal.h>
+
+        .text
+        .set noat
+
+        .globl _mcount
+        .ent _mcount
+_mcount:
+        .frame $30, 0, $28, 0
+        .prologue 0
+
+        lda     $0, -0x4000($30)
+        cmpult  $8, $30, $1
+        cmpule  $0, $30, $2
+        and     $1, $2, $3
+        bne     $3, 1f
+
+        call_pal PAL_bugchk
+
+1:      ret     $31, ($28), 1
+
+        .end _mcount