142 lines
5.8 KiB
C++
142 lines
5.8 KiB
C++
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Franz.Sirl-kernel@lauterbach.com (Franz Sirl)
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* beard@netscape.com (Patrick Beard)
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* waterson@netscape.com (Chris Waterson)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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// Platform specific code to invoke XPCOM methods on native objects
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// The purpose of XPTC_InvokeByIndex() is to map a platform
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// indepenpent call to the platform ABI. To do that,
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// XPTC_InvokeByIndex() has to determine the method to call via vtable
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// access. The parameters for the method are read from the
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// nsXPTCVariant* and prepared for th native ABI. For the Linux/PPC
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// ABI this means that the first 8 integral and floating point
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// parameters are passed in registers.
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#include "xptcprivate.h"
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// 8 integral parameters are passed in registers
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#define GPR_COUNT 8
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// 8 floating point parameters are passed in registers, floats are
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// promoted to doubles when passed in registers
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#define FPR_COUNT 8
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extern "C" PRUint32
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invoke_count_words(PRUint32 paramCount, nsXPTCVariant* s)
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{
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return PRUint32(((paramCount * 2) + 3) & ~3);
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}
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extern "C" void
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invoke_copy_to_stack(PRUint32* d,
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PRUint32 paramCount,
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nsXPTCVariant* s,
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PRUint32* gpregs,
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double* fpregs)
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{
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PRUint32 gpr = 1; // skip one GP reg for 'that'
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PRUint32 fpr = 0;
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PRUint32 tempu32;
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PRUint64 tempu64;
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for(uint32 i = 0; i < paramCount; i++, s++) {
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if(s->IsPtrData())
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tempu32 = (PRUint32) s->ptr;
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else {
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switch(s->type) {
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case nsXPTType::T_FLOAT: break;
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case nsXPTType::T_DOUBLE: break;
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case nsXPTType::T_I8: tempu32 = s->val.i8; break;
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case nsXPTType::T_I16: tempu32 = s->val.i16; break;
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case nsXPTType::T_I32: tempu32 = s->val.i32; break;
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case nsXPTType::T_I64: tempu64 = s->val.i64; break;
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case nsXPTType::T_U8: tempu32 = s->val.u8; break;
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case nsXPTType::T_U16: tempu32 = s->val.u16; break;
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case nsXPTType::T_U32: tempu32 = s->val.u32; break;
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case nsXPTType::T_U64: tempu64 = s->val.u64; break;
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case nsXPTType::T_BOOL: tempu32 = s->val.b; break;
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case nsXPTType::T_CHAR: tempu32 = s->val.c; break;
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case nsXPTType::T_WCHAR: tempu32 = s->val.wc; break;
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default: tempu32 = (PRUint32) s->val.p; break;
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}
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}
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if (!s->IsPtrData() && s->type == nsXPTType::T_DOUBLE) {
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if (fpr < FPR_COUNT)
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fpregs[fpr++] = s->val.d;
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else {
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if ((PRUint32) d & 4) d++; // doubles are 8-byte aligned on stack
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*((double*) d) = s->val.d;
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d += 2;
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}
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}
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else if (!s->IsPtrData() && s->type == nsXPTType::T_FLOAT) {
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if (fpr < FPR_COUNT)
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fpregs[fpr++] = s->val.f; // if passed in registers, floats are promoted to doubles
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else
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*((float*) d++) = s->val.f;
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}
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else if (!s->IsPtrData() && (s->type == nsXPTType::T_I64
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|| s->type == nsXPTType::T_U64)) {
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if ((gpr + 1) < GPR_COUNT) {
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if (gpr & 1) gpr++; // longlongs are aligned in odd/even register pairs, eg. r5/r6
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*((PRUint64*) &gpregs[gpr]) = tempu64;
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gpr += 2;
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}
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else {
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if ((PRUint32) d & 4) d++; // longlongs are 8-byte aligned on stack
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*((PRUint64*) d) = tempu64;
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d += 2;
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}
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}
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else {
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if (gpr < GPR_COUNT)
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gpregs[gpr++] = tempu32;
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else
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*d++ = tempu32;
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}
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}
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}
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extern "C"
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XPTC_PUBLIC_API(nsresult)
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XPTC_InvokeByIndex(nsISupports* that, PRUint32 methodIndex,
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PRUint32 paramCount, nsXPTCVariant* params);
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