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@xxxxxxxxxxxxxx> --- linux-mips-do-bp-code.diff Index: linux/arch/mips/kernel/traps.c =================================================================== --- linux.orig/arch/mips/kernel/traps.c 2015-04-02 20:27:56.780209000 +0100 +++ linux/arch/mips/kernel/traps.c 2015-04-02 20:27:56.948213000 +0100 @@ -943,7 +943,7 @@ asmlinkage void do_bp(struct pt_regs *re * 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
