Correct the interpretation of the immediate MIPS16 BREAK instruction code embedded in the instruction word across bits 10:5 rather than 11:6 as current code implies, fixing the interpretation of integer overflow and divide by zero traps. Signed-off-by: Maciej W. Rozycki <macro@xxxxxxxxxxxxxx> --- linux-mips-do-bp16.diff Index: linux/arch/mips/kernel/traps.c =================================================================== --- linux.orig/arch/mips/kernel/traps.c 2015-04-02 20:27:54.637186000 +0100 +++ linux/arch/mips/kernel/traps.c 2015-04-02 20:27:56.610207000 +0100 @@ -925,7 +925,7 @@ asmlinkage void do_bp(struct pt_regs *re if (__get_user(instr[0], (u16 __user *)msk_isa16_mode(epc))) goto out_sigsegv; - bcode = (instr[0] >> 6) & 0x3f; + bcode = (instr[0] >> 5) & 0x3f; do_trap_or_bp(regs, bcode, "Break"); goto out; }
