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xptcstubs_netbsd_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
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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
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00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 /* Implement shared vtbl methods. */
00039 
00040 #include "xptcprivate.h"
00041 
00042 #if !defined(__NetBSD__) || !defined(__m68k__)
00043 #error This code is for NetBSD/m68k only
00044 #endif
00045 
00046 extern "C" {
00047     static nsresult
00048     PrepareAndDispatch(nsXPTCStubBase* self, uint32 methodIndex, uint32* args)
00049     {
00050 #define PARAM_BUFFER_COUNT     16
00051 
00052         nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
00053         nsXPTCMiniVariant* dispatchParams = NULL;
00054         nsIInterfaceInfo* iface_info = NULL;
00055         const nsXPTMethodInfo* info;
00056         PRUint8 paramCount;
00057         PRUint8 i;
00058         nsresult result = NS_ERROR_FAILURE;
00059 
00060         NS_ASSERTION(self,"no self");
00061 
00062         self->GetInterfaceInfo(&iface_info);
00063         NS_ASSERTION(iface_info,"no interface info");
00064 
00065         iface_info->GetMethodInfo(PRUint16(methodIndex), &info);
00066         NS_ASSERTION(info,"no interface info");
00067 
00068         paramCount = info->GetParamCount();
00069 
00070         // setup variant array pointer
00071         if(paramCount > PARAM_BUFFER_COUNT)
00072             dispatchParams = new nsXPTCMiniVariant[paramCount];
00073         else
00074             dispatchParams = paramBuffer;
00075         NS_ASSERTION(dispatchParams,"no place for params");
00076 
00077         PRUint32* ap = args;
00078         for(i = 0; i < paramCount; i++, ap++)
00079         {
00080             const nsXPTParamInfo& param = info->GetParam(i);
00081             const nsXPTType& type = param.GetType();
00082             nsXPTCMiniVariant* dp = &dispatchParams[i];
00083 
00084             if(param.IsOut() || !type.IsArithmetic())
00085             {
00086                 dp->val.p = (void*) *ap;
00087                 continue;
00088             }
00089 
00090             switch(type)
00091             {
00092             // the 8 and 16 bit types will have been promoted to 32 bits before
00093             // being pushed onto the stack. Since the 68k is big endian, we
00094             // need to skip over the leading high order bytes.
00095             case nsXPTType::T_I8     : dp->val.i8  = *(((PRInt8*) ap) + 3);  break;
00096             case nsXPTType::T_I16    : dp->val.i16 = *(((PRInt16*) ap) + 1); break;
00097             case nsXPTType::T_I32    : dp->val.i32 = *((PRInt32*) ap);       break;
00098             case nsXPTType::T_I64    : dp->val.i64 = *((PRInt64*) ap); ap++; break;
00099             case nsXPTType::T_U8     : dp->val.u8  = *(((PRUint8*) ap) + 3); break;
00100             case nsXPTType::T_U16    : dp->val.u16 = *(((PRUint16*)ap) + 1); break;
00101             case nsXPTType::T_U32    : dp->val.u32 = *((PRUint32*)ap);       break;
00102             case nsXPTType::T_U64    : dp->val.u64 = *((PRUint64*)ap); ap++; break;
00103             case nsXPTType::T_FLOAT  : dp->val.f   = *((float*)   ap);       break;
00104             case nsXPTType::T_DOUBLE : dp->val.d   = *((double*)  ap); ap++; break;
00105             case nsXPTType::T_BOOL   : dp->val.b   = *((PRBool*)  ap);       break;
00106             case nsXPTType::T_CHAR   : dp->val.c   = *(((char*)   ap) + 3);  break;
00107             // wchar_t is an int (32 bits) on NetBSD
00108             case nsXPTType::T_WCHAR  : dp->val.wc  = *((wchar_t*) ap);       break;
00109             default:
00110                 NS_ASSERTION(0, "bad type");
00111                 break;
00112             }
00113         }
00114 
00115         result = self->CallMethod((PRUint16)methodIndex, info, dispatchParams);
00116 
00117         NS_RELEASE(iface_info);
00118 
00119         if(dispatchParams != paramBuffer)
00120             delete [] dispatchParams;
00121 
00122         return result;
00123     }
00124 }
00125 
00126 #define STUB_ENTRY(n)                                                 \
00127 __asm__(                                                       \
00128     ".global  _Stub"#n"__14nsXPTCStubBase\n\t"                 \
00129 "_Stub"#n"__14nsXPTCStubBase:\n\t"                             \
00130     "link  a6,#0                   \n\t"                       \
00131     "lea   a6@(12), a0                    \n\t"  /* pointer to args */       \
00132     "movl  a0, sp@-                \n\t"                       \
00133     "movl  #"#n", sp@-                    \n\t"  /* method index */   \
00134     "movl  a6@(8), sp@-                   \n\t"  /* this */           \
00135     "jbsr  _PrepareAndDispatch            \n\t"                       \
00136     "unlk  a6                      \n\t"                       \
00137     "rts                           \n\t"                       \
00138 );
00139 
00140 #define SENTINEL_ENTRY(n) \
00141 nsresult nsXPTCStubBase::Sentinel##n() \
00142 { \
00143     NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
00144     return NS_ERROR_NOT_IMPLEMENTED; \
00145 }
00146 
00147 #include "xptcstubsdef.inc"