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Diffstat (limited to '')
| -rw-r--r-- | src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/os2/xptcinvoke_emx.cpp | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/os2/xptcinvoke_emx.cpp b/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/os2/xptcinvoke_emx.cpp new file mode 100644 index 00000000..17fcadfe --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/os2/xptcinvoke_emx.cpp @@ -0,0 +1,185 @@ +/* -*- 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) 1998 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * John Fairhurst <john_fairhurst@iname.com> + * + * 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 ***** + * + * This Original Code has been modified by IBM Corporation. + * Modifications made by IBM described herein are + * Copyright (c) International Business Machines + * Corporation, 2000 + * + * Modifications to Mozilla code or documentation + * identified per MPL Section 3.3 + * + * Date Modified by Description of modification + * 03/22/2000 IBM Corp. Fixed multiple inheritance bug in XPTC_InvokeByIndex to adjust the + * "that" (this) pointer appropriately. + */ + +/* Platform specific code to invoke XPCOM methods on native objects */ + +// This is 80% copied directly from other platforms; the assembler +// stuff is all my fault, though. (jmf) + +#if !defined(__EMX__) +#error "This code is for OS/2 EMX only" +#endif + +#include "xptcprivate.h" + +// Remember that these 'words' are 32-bit DWORDs +static PRUint32 +invoke_count_words( PRUint32 paramCount, nsXPTCVariant* s) +{ + PRUint32 result = 0; + + for(PRUint32 i = 0; i < paramCount; i++, s++) + { + if(s->IsPtrData()) + result++; + + else { + + switch(s->type) + { + // 64-bit types + case nsXPTType::T_I64 : + case nsXPTType::T_U64 : + case nsXPTType::T_DOUBLE : + result+=2; + break; + + // all others are dwords + default: + result++; + break; + } + } + } + return result; +} + + +static void +invoke_copy_to_stack( PRUint32* d, uint32 paramCount, nsXPTCVariant* s) +{ + for( PRUint32 i = 0; i < paramCount; i++, d++, s++) + { + if(s->IsPtrData()) + *((void**)d) = s->ptr; + + else { + + switch(s->type) + { + case nsXPTType::T_I8 : *((int8*) d) = s->val.i8; break; + case nsXPTType::T_I16 : *((int16*) d) = s->val.i16; break; + case nsXPTType::T_I32 : *((int32*) d) = s->val.i32; break; + case nsXPTType::T_I64 : *((int64*) d) = s->val.i64; d++; break; + case nsXPTType::T_U8 : *((uint8*) d) = s->val.u8; break; + case nsXPTType::T_U16 : *((uint16*) d) = s->val.u16; break; + case nsXPTType::T_U32 : *((uint32*) d) = s->val.u32; break; + case nsXPTType::T_U64 : *((uint64*) d) = s->val.u64; d++; break; + case nsXPTType::T_FLOAT : *((float*) d) = s->val.f; break; + case nsXPTType::T_DOUBLE : *((double*) d) = s->val.d; d++; break; + case nsXPTType::T_BOOL : *((PRBool*) d) = s->val.b; break; + case nsXPTType::T_CHAR : *((char*) d) = s->val.c; break; + case nsXPTType::T_WCHAR : *((wchar_t*)d) = s->val.wc; break; + default: + // all the others are plain pointer types + *((void**)d) = s->val.p; + break; + } + } + } +} + + +XPTC_PUBLIC_API(nsresult) +XPTC_InvokeByIndex( nsISupports *that, PRUint32 index, + PRUint32 paramcount, nsXPTCVariant* params) +{ + int ibytes; + void *pStack; + int result = NS_OK; + + // Find size in bytes necessary for call + ibytes = 4 * invoke_count_words( paramcount, params); + + __asm__ __volatile__( + "movl %1, %%eax\n" /* load |ibytes| into eax */ + "subl %%eax, %%esp\n" /* make room on stack */ + "movl %%esp, %0" /* store base in |pStack| */ + : "=g" (pStack) /* %0 */ + : "g" (ibytes) /* %1 */ + : "ax", "memory", "sp" + ); + + // Fill in that gap in the stack with the params to the method + invoke_copy_to_stack( (PRUint32*) pStack, paramcount, params); + + // push the hidden 'this' parameter, traverse the vtable, + // and then call the method. + + __asm__ __volatile__( + "movl %2, %%eax\n" /* |that| ptr -> eax */ + "movl (%%eax), %%edx\n" /* vptr -> edx */ + "movl %3, %%ebx\n" + "shl $3, %%ebx\n" /* 8 bytes per method.. */ + "addl $8, %%ebx\n" /* ..plus 8 to skip over 1st 8 bytes of vtbl */ + + "addl %%ebx, %%edx\n" /* find appropriate vtbl entry */ + "movswl (%%edx),%%ecx\n" /* get possible |that| ptr adjustment value */ + "addl %%ecx, %%eax\n" /* adjust the |that| ptr (needed for multiple inheritance) */ + "pushl %%eax\n" /* enstack the possibly-adjusted |that| */ + + "addl $4, %%edx\n" /* ..add 4 more to get to the method's entry point */ + + "call (%%edx)\n" /* call method */ + "movl %%eax, %0\n" /* save rc in |result| */ + "movl %1, %%ebx\n" /* clear up stack */ + "addl $4, %%ebx\n" + "addl %%ebx, %%esp" + : "=g" (result) /* %0 */ + : "g" (ibytes), /* %1 */ + "g" (that), /* %2 */ + "g" (index) /* %3 */ + : "ax", "bx", "dx", "memory", "sp" + ); + + return result; +} |