119 lines
3.8 KiB
Text
119 lines
3.8 KiB
Text
$NetBSD: patch-xa,v 1.1.1.1 2012/03/15 09:45:29 ryoon Exp $
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NetBSD/sparc64 xptcall support code. From pkgsrc/www/firefox3/files/
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--- mozilla/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_sparc64_netbsd.s.orig 2012-03-09 12:27:39.000000000 +0000
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+++ mozilla/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_sparc64_netbsd.s
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@@ -0,0 +1,112 @@
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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+ *
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+ * The contents of this file are subject to the Netscape Public
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+ * License Version 1.1 (the "License"); you may not use this file
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+ * except in compliance with the License. You may obtain a copy of
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+ * the License at http://www.mozilla.org/NPL/
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+ *
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+ * Software distributed under the License is distributed on an "AS
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+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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+ * implied. See the License for the specific language governing
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+ * rights and limitations under the License.
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+ *
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+ * The Original Code is mozilla.org code.
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+ *
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+ * The Initial Developer of the Original Code is Netscape
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+ * Communications Corporation. Portions created by Netscape are
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+ * Copyright (C) 1998 Netscape Communications Corporation. All
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+ * Rights Reserved.
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+ *
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+ * Contributor(s):
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+ */
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+
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+/* Platform specific code to invoke XPCOM methods on native objects */
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+ .global NS_InvokeByIndex_P
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+ .type NS_InvokeByIndex_P, #function
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+/*
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+ NS_InvokeByIndex_P(nsISupports* that, PRUint32 methodIndex,
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+ PRUint32 paramCount, nsXPTCVariant* params);
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+
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+*/
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+/*
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+ * Note: To simplify stack handling we allocate an extra stack
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+ * frame here. In principle invoke_copy_to_stack() could
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+ * save the parameters our caller's frame and we could
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+ * reclaim the stackframe and do a tail call to the
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+ * function. However, this gets complicated....
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+ *
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+ * The vtable consist of be:
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+ *
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+ * struct {
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+ * short __delta;
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+ * short __index;
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+ * union {
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+ * P __pfn;
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+ * short __delta2;
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+ * } __pfn_or_delta2;
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+ * };
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+ *
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+ * See gcc/cp/cp-tree.h
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+ */
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+
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+NS_InvokeByIndex_P:
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+ save %sp,-(128 + 64),%sp ! room for the register window and
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+ ! struct pointer, rounded up to 0 % 64
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+ sll %i2,4,%l0 ! assume the worst case
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+ ! paramCount * 2 * 8 bytes
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+ cmp %l0, 0 ! are there any args? If not,
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+ be .invoke ! no need to copy args to stack
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+ nop
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+
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+ sub %sp,%l0,%sp ! create the additional stack space
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+ add %sp,0x7ff+136,%o0 ! step past the register window, the
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+ ! struct result pointer and the 'this' slot
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+ mov %i2,%o1 ! paramCount
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+ call invoke_copy_to_stack
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+ mov %i3,%o2 ! params
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+
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+!
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+! load arguments from stack into the outgoing registers
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+! BIAS is 0x7ff (2047)
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+!
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+
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+! load the %o1..5 64bit (extended word) output registers registers
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+ ldx [%sp + 0x7ff + 136],%o1 ! %i1
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+ ldx [%sp + 0x7ff + 144],%o2 ! %i2
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+ ldx [%sp + 0x7ff + 152],%o3 ! %i3
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+ ldx [%sp + 0x7ff + 160],%o4 ! %i4
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+ ldx [%sp + 0x7ff + 168],%o5 ! %i5
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+
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+! load the even number double registers starting with %f2
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+ ldd [%sp + 0x7ff + 136],%f2
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+ ldd [%sp + 0x7ff + 144],%f4
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+ ldd [%sp + 0x7ff + 152],%f6
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+ ldd [%sp + 0x7ff + 160],%f8
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+ ldd [%sp + 0x7ff + 168],%f10
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+ ldd [%sp + 0x7ff + 176],%f12
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+ ldd [%sp + 0x7ff + 184],%f14
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+ ldd [%sp + 0x7ff + 192],%f16
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+ ldd [%sp + 0x7ff + 200],%f18
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+ ldd [%sp + 0x7ff + 208],%f20
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+ ldd [%sp + 0x7ff + 216],%f22
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+ ldd [%sp + 0x7ff + 224],%f24
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+ ldd [%sp + 0x7ff + 232],%f26
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+ ldd [%sp + 0x7ff + 240],%f28
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+ ldd [%sp + 0x7ff + 248],%f30
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+
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+!
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+! calculate the target address from the vtable
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+!
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+.invoke:
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+ sll %i1,3,%l0 ! index *= 8
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+ ldx [%i0],%l1 ! *this --> address of vtable
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+ ldx [%l0 + %l1],%l0 ! this->vtable[index] --> address
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+
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+ jmpl %l0,%o7 ! call the routine
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+ mov %i0,%o0 ! move 'this' pointer to out register
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+
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+ mov %o0,%i0 ! propagate return value
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+ ret
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+ restore
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+
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+ .size NS_InvokeByIndex_P, .-NS_InvokeByIndex_P
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