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xptcstubs_linux_m68k.cpp
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00001 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1999
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 /* Implement shared vtbl methods. */
00039 
00040 #include "xptcprivate.h"
00041 
00042 extern "C" {
00043     nsresult
00044     PrepareAndDispatch(nsXPTCStubBase* self, uint32 methodIndex, uint32* args)
00045     {
00046 #define PARAM_BUFFER_COUNT     16
00047 
00048         nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
00049         nsXPTCMiniVariant* dispatchParams = NULL;
00050         nsIInterfaceInfo* iface_info = NULL;
00051         const nsXPTMethodInfo* info;
00052         PRUint8 paramCount;
00053         PRUint8 i;
00054         nsresult result = NS_ERROR_FAILURE;
00055 
00056         NS_ASSERTION(self,"no self");
00057 
00058         self->GetInterfaceInfo(&iface_info);
00059         NS_ASSERTION(iface_info,"no interface info");
00060 
00061         iface_info->GetMethodInfo(PRUint16(methodIndex), &info);
00062         NS_ASSERTION(info,"no interface info");
00063 
00064         paramCount = info->GetParamCount();
00065 
00066         // setup variant array pointer
00067         if(paramCount > PARAM_BUFFER_COUNT)
00068             dispatchParams = new nsXPTCMiniVariant[paramCount];
00069         else
00070             dispatchParams = paramBuffer;
00071         NS_ASSERTION(dispatchParams,"no place for params");
00072 
00073         PRUint32* ap = args;
00074         for(i = 0; i < paramCount; i++, ap++)
00075         {
00076             const nsXPTParamInfo& param = info->GetParam(i);
00077             const nsXPTType& type = param.GetType();
00078             nsXPTCMiniVariant* dp = &dispatchParams[i];
00079 
00080             if(param.IsOut() || !type.IsArithmetic())
00081             {
00082                 dp->val.p = (void*) *ap;
00083                 continue;
00084             }
00085 
00086             switch(type)
00087             {
00088             // the 8 and 16 bit types will have been promoted to 32 bits before
00089             // being pushed onto the stack. Since the 68k is big endian, we
00090             // need to skip over the leading high order bytes.
00091             case nsXPTType::T_I8     : dp->val.i8  = *(((PRInt8*) ap) + 3);  break;
00092             case nsXPTType::T_I16    : dp->val.i16 = *(((PRInt16*) ap) + 1); break;
00093             case nsXPTType::T_I32    : dp->val.i32 = *((PRInt32*) ap);       break;
00094             case nsXPTType::T_I64    : dp->val.i64 = *((PRInt64*) ap); ap++; break;
00095             case nsXPTType::T_U8     : dp->val.u8  = *(((PRUint8*) ap) + 3); break;
00096             case nsXPTType::T_U16    : dp->val.u16 = *(((PRUint16*)ap) + 1); break;
00097             case nsXPTType::T_U32    : dp->val.u32 = *((PRUint32*)ap);       break;
00098             case nsXPTType::T_U64    : dp->val.u64 = *((PRUint64*)ap); ap++; break;
00099             case nsXPTType::T_FLOAT  : dp->val.f   = *((float*)   ap);       break;
00100             case nsXPTType::T_DOUBLE : dp->val.d   = *((double*)  ap); ap++; break;
00101             case nsXPTType::T_BOOL   : dp->val.b   = *((PRBool*)  ap);       break;
00102             case nsXPTType::T_CHAR   : dp->val.c   = *(((char*)   ap) + 3);  break;
00103             case nsXPTType::T_WCHAR  : dp->val.wc  = *((wchar_t*) ap);       break;
00104             default:
00105                 NS_ASSERTION(0, "bad type");
00106                 break;
00107             }
00108         }
00109 
00110         result = self->CallMethod((PRUint16)methodIndex, info, dispatchParams);
00111 
00112         NS_RELEASE(iface_info);
00113 
00114         if(dispatchParams != paramBuffer)
00115             delete [] dispatchParams;
00116 
00117         return result;
00118     }
00119 }
00120 
00121 #define STUB_ENTRY(n) \
00122 nsresult nsXPTCStubBase::Stub##n() \
00123 { \
00124   register nsresult result asm("d0"); \
00125   void *frame = __builtin_frame_address(0); \
00126   __asm__ __volatile__( \
00127     "pea   %2@(12)\n\t"             /* args */ \
00128     "pea  "#n"\n\t"                 /* method index */ \
00129     "movl  %1, %/sp@-\n\t"          /* this */ \
00130     "jbsr  PrepareAndDispatch\n\t" \
00131     "addw  #12, %/sp" \
00132     : "=d" (result)     /* %0 */ \
00133     : "a" (this), "a" (frame) \
00134     : "a0", "a1", "d0", "d1", "memory" ); \
00135     return result; \
00136 }
00137 
00138 #define SENTINEL_ENTRY(n) \
00139 nsresult nsXPTCStubBase::Sentinel##n() \
00140 { \
00141     NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
00142     return NS_ERROR_NOT_IMPLEMENTED; \
00143 }
00144 
00145 #include "xptcstubsdef.inc"