From 1e8341ae0c0e117f0626cd6cf6732a0a9c8723f2 Mon Sep 17 00:00:00 2001 From: Kevin Hao Date: Sun, 12 May 2013 07:26:22 +0800 Subject: powerpc: Move the patch_exception to a common place So that it can be used by other codes. No function change. Signed-off-by: Kevin Hao Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/lib/code-patching.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'arch/powerpc/lib') 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 -- cgit v1.2.3