diff options
Diffstat (limited to 'arch/s390/kernel/traps.c')
| -rw-r--r-- | arch/s390/kernel/traps.c | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c index 164c0282b41a..dc75588d7894 100644 --- a/arch/s390/kernel/traps.c +++ b/arch/s390/kernel/traps.c @@ -53,11 +53,6 @@ void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str) if (fixup) regs->psw.addr = extable_fixup(fixup); else { - enum bug_trap_type btt; - - btt = report_bug(regs->psw.addr, regs); - if (btt == BUG_TRAP_TYPE_WARN) - return; die(regs, str); } } @@ -245,6 +240,27 @@ void space_switch_exception(struct pt_regs *regs) do_trap(regs, SIGILL, ILL_PRVOPC, "space switch event"); } +void monitor_event_exception(struct pt_regs *regs) +{ + const struct exception_table_entry *fixup; + + if (user_mode(regs)) + return; + + switch (report_bug(regs->psw.addr - (regs->int_code >> 16), regs)) { + case BUG_TRAP_TYPE_NONE: + fixup = s390_search_extables(regs->psw.addr); + if (fixup) + regs->psw.addr = extable_fixup(fixup); + break; + case BUG_TRAP_TYPE_WARN: + break; + case BUG_TRAP_TYPE_BUG: + die(regs, "monitor event"); + break; + } +} + void kernel_stack_overflow(struct pt_regs *regs) { bust_spinlocks(1); @@ -255,8 +271,23 @@ void kernel_stack_overflow(struct pt_regs *regs) } NOKPROBE_SYMBOL(kernel_stack_overflow); +static void test_monitor_call(void) +{ + int val = 1; + + asm volatile( + " mc 0,0\n" + "0: xgr %0,%0\n" + "1:\n" + EX_TABLE(0b,1b) + : "+d" (val)); + if (!val) + panic("Monitor call doesn't work!\n"); +} + void __init trap_init(void) { sort_extable(__start_dma_ex_table, __stop_dma_ex_table); local_mcck_enable(); + test_monitor_call(); } |