Don't scrub the C stack from C.

[sbcl.git] / src / compiler / x86 / macros.lisp

diff --git a/src/compiler/x86/macros.lisp b/src/compiler/x86/macros.lisp
index 29d3009..7386f77 100644 (file)
--- a/src/compiler/x86/macros.lisp
+++ b/src/compiler/x86/macros.lisp
@@ -290,7 +290,7 @@
 ;;;; error code
 (defun emit-error-break (vop kind code values)
   (assemble ()
-    #!-darwin
+    #!-ud2-breakpoints
     (inst int 3)                        ; i386 breakpoint instruction
     ;; CLH 20060314
     ;; On Darwin, we need to use #x0b0f instead of int3 in order
@@ -298,7 +298,7 @@
     ;; doesn't seem to be reliably firing SIGTRAP
     ;; handlers. Hopefully this will be fixed by Apple at a
     ;; later date.
-    #!+darwin
+    #!+ud2-breakpoints
     (inst word #x0b0f)
     ;; The return PC points here; note the location for the debugger.
     (when vop
@@ -350,6 +350,12 @@
        (progn ,@forms)
        (pseudo-atomic ,@forms)))
 
+;;; Unsafely clear pa flags so that the image can properly lose in a
+;;; pa section.
+#!+sb-thread
+(defmacro %clear-pseudo-atomic ()
+  '(inst mov (make-ea :dword :disp (* 4 thread-pseudo-atomic-bits-slot)) 0 :fs))
+
 #!+sb-thread
 (defmacro pseudo-atomic (&rest forms)
   (with-unique-names (label)
@@ -540,7 +546,7 @@ Useful for e.g. foreign calls where another thread may trigger
 collection."
   (if objects
       (let ((pins (make-gensym-list (length objects)))
-            (wpo (block-gensym "WPO")))
+            (wpo (gensym "WITH-PINNED-OBJECTS-THUNK")))
         ;; BODY is stuffed in a function to preserve the lexical
         ;; environment.
         `(flet ((,wpo () (progn ,@body)))