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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: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Guo Ren 2019-05-10 17:07:01 +08:00
parent 1994cc49f1
commit 3158d28953
1 changed files with 5 additions and 0 deletions
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5
arch/csky/kernel/traps.c
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@ -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