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Diffstat (limited to 'arch/arm64/kernel/debug-monitors.c')
-rw-r--r--arch/arm64/kernel/debug-monitors.c33
1 files changed, 24 insertions, 9 deletions
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index b056369fd47..dae7bb45894 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -23,6 +23,7 @@
#include <linux/hardirq.h>
#include <linux/init.h>
#include <linux/ptrace.h>
+#include <linux/kprobes.h>
#include <linux/stat.h>
#include <linux/uaccess.h>
@@ -228,6 +229,7 @@ static int single_step_handler(unsigned long addr, unsigned int esr,
struct pt_regs *regs)
{
siginfo_t info;
+ bool handler_found = false;
/*
* If we are stepping a pending breakpoint, call the hw_breakpoint
@@ -251,15 +253,21 @@ static int single_step_handler(unsigned long addr, unsigned int esr,
*/
user_rewind_single_step(current);
} else {
+#ifdef CONFIG_KPROBES
+ if (kprobe_single_step_handler(regs, esr) == DBG_HOOK_HANDLED)
+ handler_found = true;
+#endif
if (call_step_hook(regs, esr) == DBG_HOOK_HANDLED)
- return 0;
-
- pr_warning("Unexpected kernel single-step exception at EL1\n");
- /*
- * Re-enable stepping since we know that we will be
- * returning to regs.
- */
- set_regs_spsr_ss(regs);
+ handler_found = true;
+
+ if (!handler_found) {
+ pr_warning("Unexpected kernel single-step exception at EL1\n");
+ /*
+ * Re-enable stepping since we know that we will be
+ * returning to regs.
+ */
+ set_regs_spsr_ss(regs);
+ }
}
return 0;
@@ -315,7 +323,14 @@ static int brk_handler(unsigned long addr, unsigned int esr,
};
force_sig_info(SIGTRAP, &info, current);
- } else if (call_break_hook(regs, esr) != DBG_HOOK_HANDLED) {
+ }
+#ifdef CONFIG_KPROBES
+ else if ((esr & BRK64_ESR_MASK) == BRK64_ESR_KPROBES) {
+ if (kprobe_breakpoint_handler(regs, esr) != DBG_HOOK_HANDLED)
+ return -EFAULT;
+ }
+#endif
+ else if (call_break_hook(regs, esr) != DBG_HOOK_HANDLED) {
pr_warning("Unexpected kernel BRK exception at EL1\n");
return -EFAULT;
}