* [PATCH] powerpc: Fix single step emulation of 32bit overflowed branches
@ 2013-05-06 11:32 Michael Neuling
0 siblings, 0 replies; only message in thread
From: Michael Neuling @ 2013-05-06 11:32 UTC (permalink / raw)
To: benh; +Cc: Linux PPC dev, Paul Mackerras
Check truncate_if_32bit() on final write to nip.
Signed-off-by: Michael Neuling <mikey@neuling.org>
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index e15c521..99c7fc1 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -580,7 +580,7 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
if (instr & 1)
regs->link = regs->nip;
if (branch_taken(instr, regs))
- regs->nip = imm;
+ regs->nip = truncate_if_32bit(regs->msr, imm);
return 1;
#ifdef CONFIG_PPC64
case 17: /* sc */
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2013-05-06 11:32 [PATCH] powerpc: Fix single step emulation of 32bit overflowed branches Michael Neuling
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