[Sbcl-commits] CVS: sbcl/src/runtime x86-64-assem.S,1.9,1.10

[Juho S. <js...@us...>]

Update of /cvsroot/sbcl/sbcl/src/runtime
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv8386/src/runtime

Modified Files:
	x86-64-assem.S 
Log Message:
0.9.8.47: 
        Clear the direction flag on Lisp -> C transitions, as
        required by the x86-64 ABI. Fixes mysterious GC crashes on
        SuSE. (reported by Andrej Grozin and Hendrik Maryns)


Index: x86-64-assem.S
===================================================================
RCS file: /cvsroot/sbcl/sbcl/src/runtime/x86-64-assem.S,v
retrieving revision 1.9
retrieving revision 1.10
diff -u -d -r1.9 -r1.10
--- x86-64-assem.S	8 Jan 2006 00:33:13 -0000	1.9
+++ x86-64-assem.S	20 Jan 2006 08:34:57 -0000	1.10
@@ -60,6 +60,10 @@
 	.global GNAME(call_into_c)
 	.type	GNAME(call_into_c),@function
 GNAME(call_into_c):
+        /* ABI requires that the direction flag be clear on function
+         * entry and exit. */
+        cld
+        
 	push	%rbp		# Save old frame pointer.
 	mov	%rsp,%rbp	# Establish new frame.
 
@@ -179,6 +183,10 @@
 	pop	%r12
 	pop	%rbx
 
+        /* ABI requires that the direction flag be clear on function
+         * entry and exit. */
+        cld
+        
 /* FIXME Restore the NPX state. */
 
 	/* return value is already in rax where lisp expects it */
@@ -384,5 +392,4 @@
 	ret
 	.size	GNAME(fast_bzero), .-GNAME(fast_bzero)
 
-
         .end