xnu-6153.41.3.tar.gz

[apple/xnu.git] / bsd / dev / i386 / dtrace_isa.c

diff --git a/bsd/dev/i386/dtrace_isa.c b/bsd/dev/i386/dtrace_isa.c
index cb6795580b070b92481bedc2c9b473fb96f77bb6..6785dc53650866ce0735d343c38c444a06af77b3 100644 (file)
--- a/bsd/dev/i386/dtrace_isa.c
+++ b/bsd/dev/i386/dtrace_isa.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005-2012 Apple Inc. All rights reserved.
+ * Copyright (c) 2005-2018 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -26,7 +26,6 @@
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
-#define MACH__POSIX_C_SOURCE_PRIVATE 1 /* pulls in suitable savearea from mach/ppc/thread_status.h */
 #include <kern/thread.h>
 #include <mach/thread_status.h>
 
@@ -183,6 +182,11 @@ dtrace_getreg(struct regs *savearea, uint_t reg)
        boolean_t is64Bit = proc_is64bit(current_proc());
        x86_saved_state_t *regs = (x86_saved_state_t *)savearea;
 
+       if (regs == NULL) {
+               DTRACE_CPUFLAG_SET(CPU_DTRACE_ILLOP);
+               return (0);
+       }
+
        if (is64Bit) {
            if (reg <= SS) {
                reg = regmap[reg];