/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla 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/MPL/ * * 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 the Initial Developer are Copyright (C) 1999 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ /* Implement shared vtbl methods. */ #include "xptcprivate.h" #include "xptiprivate.h" #ifndef WIN32 #error "This code is for Win32 only" #endif extern "C" { static nsresult __stdcall PrepareAndDispatch(nsXPTCStubBase* self, PRUint32 methodIndex, PRUint32* args, PRUint32* stackBytesToPop) { #define PARAM_BUFFER_COUNT 16 nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT]; nsXPTCMiniVariant* dispatchParams = NULL; const nsXPTMethodInfo* info = NULL; PRUint8 paramCount; PRUint8 i; nsresult result = NS_ERROR_FAILURE; // If anything fails before stackBytesToPop can be set then // the failure is completely catastrophic! NS_ASSERTION(self,"no self"); self->mEntry->GetMethodInfo(PRUint16(methodIndex), &info); NS_ASSERTION(info,"no method info"); paramCount = info->GetParamCount(); // setup variant array pointer if(paramCount > PARAM_BUFFER_COUNT) dispatchParams = new nsXPTCMiniVariant[paramCount]; else dispatchParams = paramBuffer; NS_ASSERTION(dispatchParams,"no place for params"); PRUint32* ap = args; for(i = 0; i < paramCount; i++, ap++) { const nsXPTParamInfo& param = info->GetParam(i); const nsXPTType& type = param.GetType(); nsXPTCMiniVariant* dp = &dispatchParams[i]; if(param.IsOut() || !type.IsArithmetic()) { dp->val.p = (void*) *ap; continue; } // else switch(type) { case nsXPTType::T_I8 : dp->val.i8 = *((PRInt8*) ap); break; case nsXPTType::T_I16 : dp->val.i16 = *((PRInt16*) ap); break; case nsXPTType::T_I32 : dp->val.i32 = *((PRInt32*) ap); break; case nsXPTType::T_I64 : dp->val.i64 = *((PRInt64*) ap); ap++; break; case nsXPTType::T_U8 : dp->val.u8 = *((PRUint8*) ap); break; case nsXPTType::T_U16 : dp->val.u16 = *((PRUint16*)ap); break; case nsXPTType::T_U32 : dp->val.u32 = *((PRUint32*)ap); break; case nsXPTType::T_U64 : dp->val.u64 = *((PRUint64*)ap); ap++; break; case nsXPTType::T_FLOAT : dp->val.f = *((float*) ap); break; case nsXPTType::T_DOUBLE : dp->val.d = *((double*) ap); ap++; break; case nsXPTType::T_BOOL : dp->val.b = *((PRBool*) ap); break; case nsXPTType::T_CHAR : dp->val.c = *((char*) ap); break; case nsXPTType::T_WCHAR : dp->val.wc = *((wchar_t*) ap); break; default: NS_ASSERTION(0, "bad type"); break; } } *stackBytesToPop = ((PRUint32)ap) - ((PRUint32)args); result = self->mOuter->CallMethod((PRUint16)methodIndex, info, dispatchParams); if(dispatchParams != paramBuffer) delete [] dispatchParams; return result; } } // extern "C" // declspec(naked) is broken in gcc #ifndef __GNUC__ static __declspec(naked) void SharedStub(void) { __asm { push ebp // set up simple stack frame mov ebp, esp // stack has: ebp/vtbl_index/retaddr/this/args push ecx // make room for a ptr lea eax, [ebp-4] // pointer to stackBytesToPop push eax lea eax, [ebp+12] // pointer to args push eax push ecx // vtbl_index mov eax, [ebp+8] // this push eax call PrepareAndDispatch mov edx, [ebp+4] // return address mov ecx, [ebp-4] // stackBytesToPop add ecx, 8 // for 'this' and return address mov esp, ebp pop ebp add esp, ecx // fix up stack pointer jmp edx // simulate __stdcall return } } // these macros get expanded (many times) in the file #included below #define STUB_ENTRY(n) \ __declspec(naked) nsresult __stdcall nsXPTCStubBase::Stub##n() \ { __asm mov ecx, n __asm jmp SharedStub } #else #define STUB_ENTRY(n) \ nsresult __stdcall nsXPTCStubBase::Stub##n() \ { \ PRUint32 *args, stackBytesToPop = 0; \ nsresult result = 0; \ nsXPTCStubBase *obj; \ __asm__ __volatile__ ( \ "leal 0x0c(%%ebp), %%ecx\n\t" /* args */ \ "movl 0x08(%%ebp), %%edx\n\t" /* this */ \ : "=c" (args), \ "=d" (obj)); \ result = PrepareAndDispatch(obj, n, args, &stackBytesToPop); \ return result; \ } #endif /* __GNUC__ */ #define SENTINEL_ENTRY(n) \ nsresult __stdcall nsXPTCStubBase::Sentinel##n() \ { \ NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \ return NS_ERROR_NOT_IMPLEMENTED; \ } #ifdef _MSC_VER #pragma warning(disable : 4035) // OK to have no return value #endif #include "xptcstubsdef.inc" #ifdef _MSC_VER #pragma warning(default : 4035) // restore default #endif void #ifdef __GNUC__ __cdecl #endif xptc_dummy() { }