[PATCH v3 11/16] powerpc/watchpoint: Introduce is_ptrace_bp() function
From: Ravi Bangoria <hidden>
Date: 2020-04-14 03:22:15
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Introduce is_ptrace_bp() function and move the check inside the function. We will utilize it more in later set of patches. Signed-off-by: Ravi Bangoria <redacted> --- arch/powerpc/kernel/hw_breakpoint.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index 772b2c953220..319a761b7412 100644
--- a/arch/powerpc/kernel/hw_breakpoint.c
+++ b/arch/powerpc/kernel/hw_breakpoint.c@@ -90,6 +90,11 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp) hw_breakpoint_disable(); } +static bool is_ptrace_bp(struct perf_event *bp) +{ + return bp->overflow_handler == ptrace_triggered; +} + /* * Perform cleanup of arch-specific counters during unregistration * of the perf-event
@@ -324,7 +329,7 @@ int hw_breakpoint_handler(struct die_args *args) * one-shot mode. The ptrace-ed process will receive the SIGTRAP signal * generated in do_dabr(). */ - if (bp->overflow_handler == ptrace_triggered) { + if (is_ptrace_bp(bp)) { perf_bp_event(bp, regs); rc = NOTIFY_DONE; goto out;
--
2.21.1