11787 Kernel needs to be built with retpolines
11788 Kernel needs to generally use RSB stuffing
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: John Levon <john.levon@joyent.com>

@@ -586,11 +586,12 @@
         testl   %eax, %eax                      /* check for non-zero probe */
         jz      1f
         pushq   %rbp                            /* align stack properly */
         movq    %rsp, %rbp
         movl    %eax, %edi
-        call    *lockstat_probe
+        movq    lockstat_probe, %rax
+        INDIRECT_CALL_REG(rax)
         leave                                   /* unwind stack */
 1:
         movq    %gs:CPU_THREAD, %rdx            /* reload thread ptr */
         decb    T_LOCKSTAT(%rdx)                /* curthread->t_lockstat-- */
         movl    $1, %eax                        /* return success if tryenter */

@@ -608,11 +609,12 @@
         testl   %eax, %eax                      /* check for non-zero probe */
         jz      1f
         pushq   %rbp                            /* align stack properly */
         movq    %rsp, %rbp
         movl    %eax, %edi
-        call    *lockstat_probe
+        movq    lockstat_probe, %rax
+        INDIRECT_CALL_REG(rax)
         leave                                   /* unwind stack */
 1:
         movq    %gs:CPU_THREAD, %rdx            /* reload thread ptr */
         decb    T_LOCKSTAT(%rdx)                /* curthread->t_lockstat-- */
         movl    $1, %eax                        /* return success if tryenter */