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$NetBSD: patch-xa,v 1.1.1.1 2011/04/19 11:16:10 tnn Exp $
NetBSD/sparc64 xptcall support code. From pkgsrc/www/firefox3/files/
--- xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_sparc64_netbsd.s.orig 2009-07-09 10:12:51.000000000 +0200
+++ xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_sparc64_netbsd.s
@@ -0,0 +1,112 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation. Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s):
+ */
+
+/* Platform specific code to invoke XPCOM methods on native objects */
+ .global NS_InvokeByIndex_P
+ .type NS_InvokeByIndex_P, #function
+/*
+ NS_InvokeByIndex_P(nsISupports* that, PRUint32 methodIndex,
+ PRUint32 paramCount, nsXPTCVariant* params);
+
+*/
+/*
+ * Note: To simplify stack handling we allocate an extra stack
+ * frame here. In principle invoke_copy_to_stack() could
+ * save the parameters our caller's frame and we could
+ * reclaim the stackframe and do a tail call to the
+ * function. However, this gets complicated....
+ *
+ * The vtable consist of be:
+ *
+ * struct {
+ * short __delta;
+ * short __index;
+ * union {
+ * P __pfn;
+ * short __delta2;
+ * } __pfn_or_delta2;
+ * };
+ *
+ * See gcc/cp/cp-tree.h
+ */
+
+NS_InvokeByIndex_P:
+ save %sp,-(128 + 64),%sp ! room for the register window and
+ ! struct pointer, rounded up to 0 % 64
+ sll %i2,4,%l0 ! assume the worst case
+ ! paramCount * 2 * 8 bytes
+ cmp %l0, 0 ! are there any args? If not,
+ be .invoke ! no need to copy args to stack
+ nop
+
+ sub %sp,%l0,%sp ! create the additional stack space
+ add %sp,0x7ff+136,%o0 ! step past the register window, the
+ ! struct result pointer and the 'this' slot
+ mov %i2,%o1 ! paramCount
+ call invoke_copy_to_stack
+ mov %i3,%o2 ! params
+
+!
+! load arguments from stack into the outgoing registers
+! BIAS is 0x7ff (2047)
+!
+
+! load the %o1..5 64bit (extended word) output registers registers
+ ldx [%sp + 0x7ff + 136],%o1 ! %i1
+ ldx [%sp + 0x7ff + 144],%o2 ! %i2
+ ldx [%sp + 0x7ff + 152],%o3 ! %i3
+ ldx [%sp + 0x7ff + 160],%o4 ! %i4
+ ldx [%sp + 0x7ff + 168],%o5 ! %i5
+
+! load the even number double registers starting with %f2
+ ldd [%sp + 0x7ff + 136],%f2
+ ldd [%sp + 0x7ff + 144],%f4
+ ldd [%sp + 0x7ff + 152],%f6
+ ldd [%sp + 0x7ff + 160],%f8
+ ldd [%sp + 0x7ff + 168],%f10
+ ldd [%sp + 0x7ff + 176],%f12
+ ldd [%sp + 0x7ff + 184],%f14
+ ldd [%sp + 0x7ff + 192],%f16
+ ldd [%sp + 0x7ff + 200],%f18
+ ldd [%sp + 0x7ff + 208],%f20
+ ldd [%sp + 0x7ff + 216],%f22
+ ldd [%sp + 0x7ff + 224],%f24
+ ldd [%sp + 0x7ff + 232],%f26
+ ldd [%sp + 0x7ff + 240],%f28
+ ldd [%sp + 0x7ff + 248],%f30
+
+!
+! calculate the target address from the vtable
+!
+.invoke:
+ sll %i1,3,%l0 ! index *= 8
+ ldx [%i0],%l1 ! *this --> address of vtable
+ ldx [%l0 + %l1],%l0 ! this->vtable[index] --> address
+
+ jmpl %l0,%o7 ! call the routine
+ mov %i0,%o0 ! move 'this' pointer to out register
+
+ mov %o0,%i0 ! propagate return value
+ ret
+ restore
+
+ .size NS_InvokeByIndex_P, .-NS_InvokeByIndex_P
|
