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powerpc: Fix single step emulation of 32bit overflowed branches

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Check truncate_if_32bit() on final write to nip.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Neuling 2013-05-06 21:32:40 +10:00 • committed by Benjamin Herrenschmidt
commit 70a54a4fae
1 changed files with 1 additions and 1 deletions
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arch/powerpc/lib/sstep.c
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@ -580,7 +580,7 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
if (instr & 1) if (instr & 1)
regs->link = regs->nip; regs->link = regs->nip;
if (branch_taken(instr, regs)) if (branch_taken(instr, regs))
regs->nip = imm; regs->nip = truncate_if_32bit(regs->msr, imm);
return 1; return 1;
#ifdef CONFIG_PPC64 #ifdef CONFIG_PPC64
case 17: /* sc */ case 17: /* sc */