/* -*- 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): * Glen Nakamura * * 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" /* Prototype specifies unmangled function name and disables unused warning */ static nsresult PrepareAndDispatch(nsXPTCStubBase* self, uint32 methodIndex, PRUint64* args) __asm__("PrepareAndDispatch") __attribute__((used)); static nsresult PrepareAndDispatch(nsXPTCStubBase* self, uint32 methodIndex, PRUint64* args) { const PRUint8 PARAM_BUFFER_COUNT = 16; const PRUint8 NUM_ARG_REGS = 6-1; // -1 for "this" pointer nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT]; nsXPTCMiniVariant* dispatchParams = NULL; const nsXPTMethodInfo* info; PRUint8 paramCount; PRUint8 i; nsresult result = NS_ERROR_FAILURE; NS_ASSERTION(self,"no self"); self->mEntry->GetMethodInfo(PRUint16(methodIndex), &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"); if (!dispatchParams) return NS_ERROR_OUT_OF_MEMORY; // args[0] to args[NUM_ARG_REGS] hold floating point register values PRUint64* ap = args + NUM_ARG_REGS; 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; 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; break; case nsXPTType::T_FLOAT : if(i < NUM_ARG_REGS) { // floats passed via registers are stored as doubles // in the first NUM_ARG_REGS entries in args dp->val.u64 = (PRUint64) args[i]; dp->val.f = (float) dp->val.d; // convert double to float } else dp->val.u32 = (PRUint32) *ap; break; case nsXPTType::T_DOUBLE : // doubles passed via registers are also stored // in the first NUM_ARG_REGS entries in args dp->val.u64 = (i < NUM_ARG_REGS) ? args[i] : *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 = (PRUnichar) *ap; break; default: NS_ASSERTION(0, "bad type"); break; } } result = self->mOuter->CallMethod((PRUint16)methodIndex, info, dispatchParams); if(dispatchParams != paramBuffer) delete [] dispatchParams; return result; } /* * SharedStub() * Collects arguments and calls PrepareAndDispatch. The "methodIndex" is * passed to this function via $1 to preserve the argument registers. */ __asm__( "#### SharedStub ####\n" ".text\n\t" ".align 5\n\t" ".ent SharedStub\n" "SharedStub:\n\t" ".frame $30,96,$26,0\n\t" ".mask 0x4000000,-96\n\t" "ldgp $29,0($27)\n" "$SharedStub..ng:\n\t" "subq $30,96,$30\n\t" "stq $26,0($30)\n\t" ".prologue 1\n\t" /* * Store arguments passed via registers to the stack. * Floating point registers are stored as doubles and converted * to floats in PrepareAndDispatch if necessary. */ "stt $f17,16($30)\n\t" /* floating point registers */ "stt $f18,24($30)\n\t" "stt $f19,32($30)\n\t" "stt $f20,40($30)\n\t" "stt $f21,48($30)\n\t" "stq $17,56($30)\n\t" /* integer registers */ "stq $18,64($30)\n\t" "stq $19,72($30)\n\t" "stq $20,80($30)\n\t" "stq $21,88($30)\n\t" /* * Call PrepareAndDispatch function. */ "bis $1,$1,$17\n\t" /* pass "methodIndex" */ "addq $30,16,$18\n\t" /* pass "args" */ "bsr $26,$PrepareAndDispatch..ng\n\t" "ldq $26,0($30)\n\t" "addq $30,96,$30\n\t" "ret $31,($26),1\n\t" ".end SharedStub" ); /* * nsresult nsXPTCStubBase::Stub##n() * Sets register $1 to "methodIndex" and jumps to SharedStub. */ #define STUB_MANGLED_ENTRY(n, symbol) \ "#### Stub"#n" ####" "\n\t" \ ".text" "\n\t" \ ".align 5" "\n\t" \ ".globl " symbol "\n\t" \ ".ent " symbol "\n" \ symbol ":" "\n\t" \ ".frame $30,0,$26,0" "\n\t" \ "ldgp $29,0($27)" "\n" \ "$" symbol "..ng:" "\n\t" \ ".prologue 1" "\n\t" \ "lda $1,"#n "\n\t" \ "br $31,$SharedStub..ng" "\n\t" \ ".end " symbol #if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100 /* G++ V3 ABI */ #define STUB_ENTRY(n) \ __asm__( \ ".if "#n" < 10" "\n\t" \ STUB_MANGLED_ENTRY(n, "_ZN14nsXPTCStubBase5Stub"#n"Ev") "\n\t" \ ".elseif "#n" < 100" "\n\t" \ STUB_MANGLED_ENTRY(n, "_ZN14nsXPTCStubBase6Stub"#n"Ev") "\n\t" \ ".elseif "#n" < 1000" "\n\t" \ STUB_MANGLED_ENTRY(n, "_ZN14nsXPTCStubBase7Stub"#n"Ev") "\n\t" \ ".else" "\n\t" \ ".err \"Stub"#n" >= 1000 not yet supported.\"" "\n\t" \ ".endif" \ ); #else /* not G++ V3 ABI */ #define STUB_ENTRY(n) \ __asm__( \ STUB_MANGLED_ENTRY(n, "Stub"#n"__14nsXPTCStubBase") \ ); #endif /* G++ V3 ABI */ #define SENTINEL_ENTRY(n) \ nsresult nsXPTCStubBase::Sentinel##n() \ { \ NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \ return NS_ERROR_NOT_IMPLEMENTED; \ } #include "xptcstubsdef.inc"