[MIPS] Use conditional traps for BUG_ON on MIPS II and better.

[pandora-kernel.git] / arch / mips / kernel / traps.c

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 0ae19e1..2a932ca 100644 (file)
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -669,8 +669,6 @@ asmlinkage void do_bp(struct pt_regs *regs)
        unsigned int opcode, bcode;
        siginfo_t info;
 
-       die_if_kernel("Break instruction in kernel code", regs);
-
        if (get_user(opcode, (unsigned int __user *) exception_epc(regs)))
                goto out_sigsegv;
 
@@ -693,6 +691,7 @@ asmlinkage void do_bp(struct pt_regs *regs)
        switch (bcode) {
        case BRK_OVERFLOW << 10:
        case BRK_DIVZERO << 10:
+               die_if_kernel("Break instruction in kernel code", regs);
                if (bcode == (BRK_DIVZERO << 10))
                        info.si_code = FPE_INTDIV;
                else
@@ -702,7 +701,11 @@ asmlinkage void do_bp(struct pt_regs *regs)
                info.si_addr = (void __user *) regs->cp0_epc;
                force_sig_info(SIGFPE, &info, current);
                break;
+       case BRK_BUG:
+               die("Kernel bug detected", regs);
+               break;
        default:
+               die_if_kernel("Break instruction in kernel code", regs);
                force_sig(SIGTRAP, current);
        }
 
@@ -715,8 +718,6 @@ asmlinkage void do_tr(struct pt_regs *regs)
        unsigned int opcode, tcode = 0;
        siginfo_t info;
 
-       die_if_kernel("Trap instruction in kernel code", regs);
-
        if (get_user(opcode, (unsigned int __user *) exception_epc(regs)))
                goto out_sigsegv;
 
@@ -733,6 +734,7 @@ asmlinkage void do_tr(struct pt_regs *regs)
        switch (tcode) {
        case BRK_OVERFLOW:
        case BRK_DIVZERO:
+               die_if_kernel("Trap instruction in kernel code", regs);
                if (tcode == BRK_DIVZERO)
                        info.si_code = FPE_INTDIV;
                else
@@ -742,7 +744,11 @@ asmlinkage void do_tr(struct pt_regs *regs)
                info.si_addr = (void __user *) regs->cp0_epc;
                force_sig_info(SIGFPE, &info, current);
                break;
+       case BRK_BUG:
+               die("Kernel bug detected", regs);
+               break;
        default:
+               die_if_kernel("Trap instruction in kernel code", regs);
                force_sig(SIGTRAP, current);
        }