35944f86f2
this is smaller than firefox and has special handling for small screens which is useful for machines like the zaurus. unfortunately, it's not there yet, see the TODO. please don't add this to the www Makefile yet.
254 lines
9.2 KiB
C++
254 lines
9.2 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) 1999
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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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// Implement shared vtbl methods.
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#include "xptcprivate.h"
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// The Linux/PPC ABI (aka PPC/SYSV ABI) passes the first 8 integral
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// parameters and the first 8 floating point parameters in registers
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// (r3-r10 and f1-f8), no stack space is allocated for these by the
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// caller. The rest of the parameters are passed in the callers stack
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// area. The stack pointer has to retain 16-byte alignment, longlongs
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// and doubles are aligned on 8-byte boundaries.
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#define PARAM_BUFFER_COUNT 16
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#define GPR_COUNT 8
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#define FPR_COUNT 8
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// PrepareAndDispatch() is called by SharedStub() and calls the actual method.
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//
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// - 'args[]' contains the arguments passed on stack
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// - 'gprData[]' contains the arguments passed in integer registers
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// - 'fprData[]' contains the arguments passed in floating point registers
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//
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// The parameters are mapped into an array of type 'nsXPTCMiniVariant'
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// and then the method gets called.
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extern "C" nsresult
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PrepareAndDispatch(nsXPTCStubBase* self,
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PRUint32 methodIndex,
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PRUint32* args,
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PRUint32 *gprData,
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double *fprData)
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{
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nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
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nsXPTCMiniVariant* dispatchParams = NULL;
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nsIInterfaceInfo* iface_info = NULL;
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const nsXPTMethodInfo* info;
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PRUint32 paramCount;
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PRUint32 i;
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nsresult result = NS_ERROR_FAILURE;
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NS_ASSERTION(self,"no self");
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self->GetInterfaceInfo(&iface_info);
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NS_ASSERTION(iface_info,"no interface info");
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if (! iface_info)
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return NS_ERROR_UNEXPECTED;
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iface_info->GetMethodInfo(PRUint16(methodIndex), &info);
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NS_ASSERTION(info,"no method info");
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if (! info)
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return NS_ERROR_UNEXPECTED;
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paramCount = info->GetParamCount();
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// setup variant array pointer
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if(paramCount > PARAM_BUFFER_COUNT)
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dispatchParams = new nsXPTCMiniVariant[paramCount];
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else
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dispatchParams = paramBuffer;
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NS_ASSERTION(dispatchParams,"no place for params");
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if (! dispatchParams)
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return NS_ERROR_OUT_OF_MEMORY;
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PRUint32* ap = args;
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PRUint32 gpr = 1; // skip one GPR register
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PRUint32 fpr = 0;
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PRUint32 tempu32;
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PRUint64 tempu64;
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for(i = 0; i < paramCount; i++) {
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const nsXPTParamInfo& param = info->GetParam(i);
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const nsXPTType& type = param.GetType();
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nsXPTCMiniVariant* dp = &dispatchParams[i];
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if (!param.IsOut() && type == nsXPTType::T_DOUBLE) {
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if (fpr < FPR_COUNT)
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dp->val.d = fprData[fpr++];
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else {
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if ((PRUint32) ap & 4) ap++; // doubles are 8-byte aligned on stack
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dp->val.d = *(double*) ap;
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ap += 2;
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}
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continue;
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}
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else if (!param.IsOut() && type == nsXPTType::T_FLOAT) {
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if (fpr < FPR_COUNT)
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dp->val.f = (float) fprData[fpr++]; // in registers floats are passed as doubles
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else
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dp->val.f = *(float*) ap++;
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continue;
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}
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else if (!param.IsOut() && (type == nsXPTType::T_I64
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|| type == nsXPTType::T_U64)) {
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if (gpr & 1) gpr++; // longlongs are aligned in odd/even register pairs, eg. r5/r6
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if ((gpr + 1) < GPR_COUNT) {
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tempu64 = *(PRUint64*) &gprData[gpr];
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gpr += 2;
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}
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else {
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if ((PRUint32) ap & 4) ap++; // longlongs are 8-byte aligned on stack
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tempu64 = *(PRUint64*) ap;
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ap += 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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tempu32 = gprData[gpr++];
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else
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tempu32 = *ap++;
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}
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if(param.IsOut() || !type.IsArithmetic()) {
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dp->val.p = (void*) tempu32;
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continue;
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}
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switch(type) {
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case nsXPTType::T_I8: dp->val.i8 = (PRInt8) tempu32; break;
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case nsXPTType::T_I16: dp->val.i16 = (PRInt16) tempu32; break;
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case nsXPTType::T_I32: dp->val.i32 = (PRInt32) tempu32; break;
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case nsXPTType::T_I64: dp->val.i64 = (PRInt64) tempu64; break;
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case nsXPTType::T_U8: dp->val.u8 = (PRUint8) tempu32; break;
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case nsXPTType::T_U16: dp->val.u16 = (PRUint16) tempu32; break;
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case nsXPTType::T_U32: dp->val.u32 = (PRUint32) tempu32; break;
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case nsXPTType::T_U64: dp->val.u64 = (PRUint64) tempu64; break;
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case nsXPTType::T_BOOL: dp->val.b = (PRBool) tempu32; break;
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case nsXPTType::T_CHAR: dp->val.c = (char) tempu32; break;
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case nsXPTType::T_WCHAR: dp->val.wc = (wchar_t) tempu32; break;
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default:
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NS_ASSERTION(0, "bad type");
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break;
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}
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}
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result = self->CallMethod((PRUint16) methodIndex, info, dispatchParams);
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NS_RELEASE(iface_info);
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if (dispatchParams != paramBuffer)
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delete [] dispatchParams;
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return result;
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}
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// Load r11 with the constant 'n' and branch to SharedStub().
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//
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// XXX Yes, it's ugly that we're relying on gcc's name-mangling here;
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// however, it's quick, dirty, and'll break when the ABI changes on
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// us, which is what we want ;-).
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#if __GXX_ABI_VERSION < 100
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// gcc-2 version
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# define STUB_ENTRY(n) \
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__asm__ ( \
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".section \".text\" \n\t" \
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".align 2 \n\t" \
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".globl Stub"#n"__14nsXPTCStubBase \n\t" \
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".type Stub"#n"__14nsXPTCStubBase,@function \n\n" \
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\
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"Stub"#n"__14nsXPTCStubBase: \n\t" \
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"li 11,"#n" \n\t" \
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"b SharedStub@local \n" \
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);
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#else
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// gcc-3 version
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//
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// As G++3 ABI contains the length of the functionname in the mangled
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// name, it is difficult to get a generic assembler mechanism like
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// in the G++ 2.95 case.
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// Create names would be like:
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// _ZN14nsXPTCStubBase5Stub1Ev
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// _ZN14nsXPTCStubBase6Stub12Ev
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// _ZN14nsXPTCStubBase7Stub123Ev
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// _ZN14nsXPTCStubBase8Stub1234Ev
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// etc.
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// Use assembler directives to get the names right...
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# define STUB_ENTRY(n) \
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__asm__ ( \
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".align 2 \n\t" \
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".if "#n" < 10 \n\t" \
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".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
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".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \
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"_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
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\
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".elseif "#n" < 100 \n\t" \
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".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
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".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \
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"_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
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\
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".elseif "#n" < 1000 \n\t" \
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".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
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".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \
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"_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
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\
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".else \n\t" \
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".err \"stub number "#n" >= 1000 not yet supported\"\n" \
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".endif \n\t" \
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\
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"li 11,"#n" \n\t" \
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"b SharedStub@local \n" \
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);
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#endif
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#define SENTINEL_ENTRY(n) \
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nsresult nsXPTCStubBase::Sentinel##n() \
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{ \
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NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
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return NS_ERROR_NOT_IMPLEMENTED; \
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}
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#include "xptcstubsdef.inc"
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