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-rw-r--r--arch/powerpc/lib/code-patching.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c
index 17e5b2364312..d5edbeb8eb82 100644
--- a/arch/powerpc/lib/code-patching.c
+++ b/arch/powerpc/lib/code-patching.c
@@ -159,6 +159,21 @@ unsigned int translate_branch(const unsigned int *dest, const unsigned int *src)
return 0;
}
+#ifdef CONFIG_PPC_BOOK3E_64
+void __patch_exception(int exc, unsigned long addr)
+{
+ extern unsigned int interrupt_base_book3e;
+ unsigned int *ibase = &interrupt_base_book3e;
+
+ /* Our exceptions vectors start with a NOP and -then- a branch
+ * to deal with single stepping from userspace which stops on
+ * the second instruction. Thus we need to patch the second
+ * instruction of the exception, not the first one
+ */
+
+ patch_branch(ibase + (exc / 4) + 1, addr, 0);
+}
+#endif
#ifdef CONFIG_CODE_PATCHING_SELFTEST

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