diff options
Diffstat (limited to 'arch/mips/kernel/traps.c')
| -rw-r--r-- | arch/mips/kernel/traps.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 3f6de76d485d..353056110f2b 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -32,6 +32,7 @@ #include <asm/cpu.h> #include <asm/dsp.h> #include <asm/fpu.h> +#include <asm/fpu_emulator.h> #include <asm/mipsregs.h> #include <asm/mipsmtregs.h> #include <asm/module.h> @@ -722,6 +723,21 @@ static void do_trap_or_bp(struct pt_regs *regs, unsigned int code, die_if_kernel("Kernel bug detected", regs); force_sig(SIGTRAP, current); break; + case BRK_MEMU: + /* + * Address errors may be deliberately induced by the FPU + * emulator to retake control of the CPU after executing the + * instruction in the delay slot of an emulated branch. + * + * Terminate if exception was recognized as a delay slot return + * otherwise handle as normal. + */ + if (do_dsemulret(regs)) + return; + + die_if_kernel("Math emu break/trap", regs); + force_sig(SIGTRAP, current); + break; default: scnprintf(b, sizeof(b), "%s instruction in kernel code", str); die_if_kernel(b, regs); |