Merge branch 'for-2.6.28' of git://linux-nfs.org/~bfields/linux

[linux-2.6-omap-h63xx.git] / arch / mips / kernel / traps.c

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 3f6de76d485dc059151d27334a7abc871d99d2a9..353056110f2b6cca2865bc17a187eaf10806572d 100644 (file)
--- 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);