diff options
Diffstat (limited to 'arch/xtensa/kernel/traps.c')
| -rw-r--r-- | arch/xtensa/kernel/traps.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c index e4764f216a7a..d02fc304b31c 100644 --- a/arch/xtensa/kernel/traps.c +++ b/arch/xtensa/kernel/traps.c @@ -39,6 +39,7 @@ #include <asm/pgtable.h> #include <asm/processor.h> #include <asm/traps.h> +#include <asm/hw_breakpoint.h> /* * Machine specific interrupt handlers @@ -338,9 +339,22 @@ do_unaligned_user (struct pt_regs *regs) } #endif +/* Handle debug events. + * When CONFIG_HAVE_HW_BREAKPOINT is on this handler is called with + * preemption disabled to avoid rescheduling and keep mapping of hardware + * breakpoint structures to debug registers intact, so that + * DEBUGCAUSE.DBNUM could be used in case of data breakpoint hit. + */ void do_debug(struct pt_regs *regs) { +#ifdef CONFIG_HAVE_HW_BREAKPOINT + int ret = check_hw_breakpoint(regs); + + preempt_enable(); + if (ret == 0) + return; +#endif __die_if_kernel("Breakpoint in kernel", regs, SIGKILL); /* If in user mode, send SIGTRAP signal to current process */ |