/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: NPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Netscape 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/NPL/ * * 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): * Franz.Sirl-kernel@lauterbach.com (Franz Sirl) * beard@netscape.com (Patrick Beard) * waterson@netscape.com (Chris Waterson) * * Alternatively, the contents of this file may be used under the terms of * either 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 NPL, 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 NPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ // Implement shared vtbl methods. #include "xptcprivate.h" // The Linux/PPC ABI (aka PPC/SYSV ABI) passes the first 8 integral // parameters and the first 8 floating point parameters in registers // (r3-r10 and f1-f8), no stack space is allocated for these by the // caller. The rest of the parameters are passed in the callers stack // area. The stack pointer has to retain 16-byte alignment, longlongs // and doubles are aligned on 8-byte boundaries. #define PARAM_BUFFER_COUNT 16 #define GPR_COUNT 8 #define FPR_COUNT 8 // PrepareAndDispatch() is called by SharedStub() and calls the actual method. // // - 'args[]' contains the arguments passed on stack // - 'gprData[]' contains the arguments passed in integer registers // - 'fprData[]' contains the arguments passed in floating point registers // // The parameters are mapped into an array of type 'nsXPTCMiniVariant' // and then the method gets called. extern "C" nsresult PrepareAndDispatch(nsXPTCStubBase* self, PRUint32 methodIndex, PRUint32* args, PRUint32 *gprData, double *fprData) { nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT]; nsXPTCMiniVariant* dispatchParams = NULL; nsIInterfaceInfo* iface_info = NULL; const nsXPTMethodInfo* info; PRUint32 paramCount; PRUint32 i; nsresult result = NS_ERROR_FAILURE; NS_ASSERTION(self,"no self"); self->GetInterfaceInfo(&iface_info); NS_ASSERTION(iface_info,"no interface info"); if (! iface_info) return NS_ERROR_UNEXPECTED; iface_info->GetMethodInfo(PRUint16(methodIndex), &info); NS_ASSERTION(info,"no method info"); if (! info) return NS_ERROR_UNEXPECTED; 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"); if (! dispatchParams) return NS_ERROR_OUT_OF_MEMORY; PRUint32* ap = args; PRUint32 gpr = 1; // skip one GPR register PRUint32 fpr = 0; PRUint32 tempu32; PRUint64 tempu64; for(i = 0; i < paramCount; i++) { const nsXPTParamInfo& param = info->GetParam(i); const nsXPTType& type = param.GetType(); nsXPTCMiniVariant* dp = &dispatchParams[i]; if (!param.IsOut() && type == nsXPTType::T_DOUBLE) { if (fpr < FPR_COUNT) dp->val.d = fprData[fpr++]; else { if ((PRUint32) ap & 4) ap++; // doubles are 8-byte aligned on stack dp->val.d = *(double*) ap; ap += 2; } continue; } else if (!param.IsOut() && type == nsXPTType::T_FLOAT) { if (fpr < FPR_COUNT) dp->val.f = (float) fprData[fpr++]; // in registers floats are passed as doubles else dp->val.f = *(float*) ap++; continue; } else if (!param.IsOut() && (type == nsXPTType::T_I64 || type == nsXPTType::T_U64)) { if (gpr & 1) gpr++; // longlongs are aligned in odd/even register pairs, eg. r5/r6 if ((gpr + 1) < GPR_COUNT) { tempu64 = *(PRUint64*) &gprData[gpr]; gpr += 2; } else { if ((PRUint32) ap & 4) ap++; // longlongs are 8-byte aligned on stack tempu64 = *(PRUint64*) ap; ap += 2; } } else { if (gpr < GPR_COUNT) tempu32 = gprData[gpr++]; else tempu32 = *ap++; } if(param.IsOut() || !type.IsArithmetic()) { dp->val.p = (void*) tempu32; continue; } switch(type) { case nsXPTType::T_I8: dp->val.i8 = (PRInt8) tempu32; break; case nsXPTType::T_I16: dp->val.i16 = (PRInt16) tempu32; break; case nsXPTType::T_I32: dp->val.i32 = (PRInt32) tempu32; break; case nsXPTType::T_I64: dp->val.i64 = (PRInt64) tempu64; break; case nsXPTType::T_U8: dp->val.u8 = (PRUint8) tempu32; break; case nsXPTType::T_U16: dp->val.u16 = (PRUint16) tempu32; break; case nsXPTType::T_U32: dp->val.u32 = (PRUint32) tempu32; break; case nsXPTType::T_U64: dp->val.u64 = (PRUint64) tempu64; break; case nsXPTType::T_BOOL: dp->val.b = (PRBool) tempu32; break; case nsXPTType::T_CHAR: dp->val.c = (char) tempu32; break; case nsXPTType::T_WCHAR: dp->val.wc = (wchar_t) tempu32; break; default: NS_ASSERTION(0, "bad type"); break; } } result = self->CallMethod((PRUint16) methodIndex, info, dispatchParams); NS_RELEASE(iface_info); if (dispatchParams != paramBuffer) delete [] dispatchParams; return result; } // Load r11 with the constant 'n' and branch to SharedStub(). // // XXX Yes, it's ugly that we're relying on gcc's name-mangling here; // however, it's quick, dirty, and'll break when the ABI changes on // us, which is what we want ;-). #if __GXX_ABI_VERSION < 100 // gcc-2 version # define STUB_ENTRY(n) \ __asm__ ( \ ".section \".text\" \n\t" \ ".align 2 \n\t" \ ".globl Stub"#n"__14nsXPTCStubBase \n\t" \ ".type Stub"#n"__14nsXPTCStubBase,@function \n\n" \ \ "Stub"#n"__14nsXPTCStubBase: \n\t" \ "li 11,"#n" \n\t" \ "b SharedStub@local \n" \ ); #else // gcc-3 version // // As G++3 ABI contains the length of the functionname in the mangled // name, it is difficult to get a generic assembler mechanism like // in the G++ 2.95 case. // Create names would be like: // _ZN14nsXPTCStubBase5Stub1Ev // _ZN14nsXPTCStubBase6Stub12Ev // _ZN14nsXPTCStubBase7Stub123Ev // _ZN14nsXPTCStubBase8Stub1234Ev // etc. // Use assembler directives to get the names right... # define STUB_ENTRY(n) \ __asm__ ( \ ".align 2 \n\t" \ ".if "#n" < 10 \n\t" \ ".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \ ".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \ "_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \ \ ".elseif "#n" < 100 \n\t" \ ".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \ ".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \ "_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \ \ ".elseif "#n" < 1000 \n\t" \ ".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \ ".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \ "_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \ \ ".else \n\t" \ ".err \"stub number "#n" >= 1000 not yet supported\"\n" \ ".endif \n\t" \ \ "li 11,"#n" \n\t" \ "b SharedStub@local \n" \ ); #endif #define SENTINEL_ENTRY(n) \ nsresult nsXPTCStubBase::Sentinel##n() \ { \ NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \ return NS_ERROR_NOT_IMPLEMENTED; \ } #include "xptcstubsdef.inc"