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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <cstring>
#include <sal/types.h>
#include <sal/alloca.h>
#include "callvirtualfunction.hxx"
void callVirtualFunction(
unsigned long function, unsigned long * gpr, unsigned long * fpr,
unsigned long * stack, sal_Int32 sp, void * ret)
{
void * stackargs;
if (sp != 0) {
stackargs = alloca(((sp + 1) >> 1) * 16);
std::memcpy(stackargs, stack, sp * 8);
}
asm volatile(
"ldp x0, x1, [%[gpr_]]\n\t"
"ldp x2, x3, [%[gpr_], #16]\n\t"
"ldp x4, x5, [%[gpr_], #32]\n\t"
"ldp x6, x7, [%[gpr_], #48]\n\t"
"ldr x8, %[ret_]\n\t"
"ldr x9, %[function_]\n\t"
"ldp d0, d1, [%[fpr_]]\n\t"
"ldp d2, d3, [%[fpr_], #16]\n\t"
"ldp d4, d5, [%[fpr_], #32]\n\t"
"ldp d6, d7, [%[fpr_], #48]\n\t"
"blr x9\n\t"
"stp x0, x1, [%[gpr_]]\n\t"
"stp d0, d1, [%[fpr_]]\n\t"
"stp d2, d3, [%[fpr_], #16]\n\t"
:: [gpr_]"r" (gpr), [fpr_]"r" (fpr), [function_]"m" (function),
[ret_]"m" (ret),
"m" (stackargs) // dummy input to prevent optimizing the alloca away
: "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
"r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18"/*TODO?*/, "v0",
"v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", "v11",
"v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", "v20", "v21",
"v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31",
"memory"
// only the bottom 64 bits of v8--15 need to be preserved by callees
);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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