xnu-6153.61.1.tar.gz

[apple/xnu.git] / bsd / dev / arm / fasttrap_isa.c

diff --git a/bsd/dev/arm/fasttrap_isa.c b/bsd/dev/arm/fasttrap_isa.c
index c45a952882baa38a2fa6d0db1785f27a3a9c63f6..08f831a01c31f2fd84d84994193775047cca529b 100644 (file)
--- a/bsd/dev/arm/fasttrap_isa.c
+++ b/bsd/dev/arm/fasttrap_isa.c
@@ -27,16 +27,6 @@
  * Use is subject to license terms.
  */
 
-/*
- * #pragma ident       "@(#)fasttrap_isa.c     1.19    05/09/14 SMI"
- */
-
-#ifdef KERNEL
-#ifndef _KERNEL
-#define _KERNEL                 /* Solaris vs. Darwin */
-#endif
-#endif
-
 #include <sys/fasttrap_isa.h>
 #include <sys/fasttrap_impl.h>
 #include <sys/dtrace.h>
@@ -293,8 +283,8 @@ fasttrap_return_common(proc_t *p, arm_saved_state_t *regs, user_addr_t pc, user_
                }
 
                if (probe->ftp_prov->ftp_provider_type == DTFTP_PROVIDER_ONESHOT) {
-                       uint8_t already_triggered = atomic_or_8(&probe->ftp_triggered, 1);
-                       if (already_triggered) {
+                       if (os_atomic_xchg(&probe->ftp_triggered, 1, relaxed)) {
+                               /* already triggered */
                                continue;
                        }
                }
@@ -326,6 +316,9 @@ fasttrap_return_common(proc_t *p, arm_saved_state_t *regs, user_addr_t pc, user_
        lck_mtx_unlock(pid_mtx);
 }
 
+#if DEBUG
+__dead2
+#endif
 static void
 fasttrap_sigsegv(proc_t *p, uthread_t t, user_addr_t addr, arm_saved_state_t *regs)
 {
@@ -522,8 +515,8 @@ fasttrap_pid_probe(arm_saved_state_t *regs)
 #endif
                        } else {
                                if (probe->ftp_prov->ftp_provider_type == DTFTP_PROVIDER_ONESHOT) {
-                                       uint8_t already_triggered = atomic_or_8(&probe->ftp_triggered, 1);
-                                       if (already_triggered) {
+                                       if (os_atomic_xchg(&probe->ftp_triggered, 1, relaxed)) {
+                                               /* already triggered */
                                                continue;
                                        }
                                }