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Commit 3158d289 authored by Guo Ren's avatar Guo Ren
Browse files

csky: Fixup no panic in kernel for some traps 



These traps couldn't be hanppen in kernel and we must panic there not
send a signal to userspace.

Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
parent 1994cc49

arch/csky/kernel/traps.c

+5 −0
Original line number Diff line number Diff line
@@ -120,6 +120,7 @@ asmlinkage void trap_c(struct pt_regs *regs) 


	switch (vector) {

	case VEC_ZERODIV:

		die_if_kernel("Kernel mode ZERO DIV", regs, vector);

		sig = SIGFPE;

		break;

	/* ptrace */
@@ -128,6 +129,7 @@ asmlinkage void trap_c(struct pt_regs *regs) 
		sig = SIGTRAP;

		break;

	case VEC_ILLEGAL:

		die_if_kernel("Kernel mode ILLEGAL", regs, vector);

#ifndef CONFIG_CPU_NO_USER_BKPT

		if (*(uint16_t *)instruction_pointer(regs) != USR_BKPT)

#endif
@@ -139,6 +141,7 @@ asmlinkage void trap_c(struct pt_regs *regs) 
	case VEC_TRAP1:

	/* jtagserver breakpoint */

	case VEC_BREAKPOINT:

		die_if_kernel("Kernel mode BKPT", regs, vector);

		info.si_code = TRAP_BRKPT;

		sig = SIGTRAP;

		break;
@@ -150,8 +153,10 @@ asmlinkage void trap_c(struct pt_regs *regs) 
#endif

#ifdef CONFIG_CPU_HAS_FPU

	case VEC_FPE:

		die_if_kernel("Kernel mode FPE", regs, vector);

		return fpu_fpe(regs);

	case VEC_PRIV:

		die_if_kernel("Kernel mode PRIV", regs, vector);

		if (fpu_libc_helper(regs))

			return;

#endif