Commit c9875032 authored Apr 03, 2015 by Maciej W. Rozycki Committed by Ralf Baechle Apr 08, 2015

MIPS: Fix BREAK code interpretation heuristics



Do not lose the other half of the BREAK code where there is an upper
half.  This is so that e.g. `BREAK 7, 7' is not interpreted as a divide
by zero trap, while `BREAK 0, 7' or `BREAK 7, 0' still are.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9697/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent f6a31da5

arch/mips/kernel/traps.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -943,7 +943,7 @@ asmlinkage void do_bp(struct pt_regs *regs)
		* We handle both cases with a simple heuristics. --macro
		*/
		if (bcode >= (1 << 10))
		bcode >>= 10;
		bcode = ((bcode & ((1 << 10) - 1)) << 10) \| (bcode >> 10);

		/*
		* notify the kprobe handlers, if instruction is likely to