220 lines
7.9 KiB
C++
220 lines
7.9 KiB
C++
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "xptcprivate.h"
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#include "xptiprivate.h"
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#ifndef __AARCH64EL__
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#error "Only little endian compatibility was tested"
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#endif
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/*
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* This is for AArch64 ABI
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*
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* When we're called, the "gp" registers are stored in gprData and
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* the "fp" registers are stored in fprData. Each array has 8 regs
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* but first reg in gprData is a placeholder for 'self'.
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*/
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extern "C" nsresult
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PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
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uint64_t *gprData, double *fprData)
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{
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#define PARAM_BUFFER_COUNT 16
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#define PARAM_GPR_COUNT 8
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#define PARAM_FPR_COUNT 8
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nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
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nsXPTCMiniVariant* dispatchParams = NULL;
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const nsXPTMethodInfo* info;
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nsresult result = NS_ERROR_FAILURE;
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NS_ASSERTION(self,"no self");
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self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
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NS_ASSERTION(info,"no method info");
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uint32_t paramCount = info->GetParamCount();
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// setup variant array pointer
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if (paramCount > PARAM_BUFFER_COUNT) {
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dispatchParams = new nsXPTCMiniVariant[paramCount];
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} else {
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dispatchParams = paramBuffer;
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}
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NS_ASSERTION(dispatchParams,"no place for params");
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uint64_t* ap = args;
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uint32_t next_gpr = 1; // skip first arg which is 'self'
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uint32_t next_fpr = 0;
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for (uint32_t i = 0; i < paramCount; i++) {
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const nsXPTParamInfo& param = info->GetParam(i);
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const nsXPTType& type = param.GetType();
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nsXPTCMiniVariant* dp = &dispatchParams[i];
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if (param.IsOut() || !type.IsArithmetic()) {
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.p = (void*)gprData[next_gpr++];
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} else {
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dp->val.p = (void*)*ap++;
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}
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continue;
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}
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switch (type) {
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case nsXPTType::T_I8:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.i8 = (int8_t)gprData[next_gpr++];
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} else {
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dp->val.i8 = (int8_t)*ap++;
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}
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break;
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case nsXPTType::T_I16:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.i16 = (int16_t)gprData[next_gpr++];
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} else {
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dp->val.i16 = (int16_t)*ap++;
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}
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break;
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case nsXPTType::T_I32:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.i32 = (int32_t)gprData[next_gpr++];
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} else {
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dp->val.i32 = (int32_t)*ap++;
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}
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break;
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case nsXPTType::T_I64:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.i64 = (int64_t)gprData[next_gpr++];
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} else {
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dp->val.i64 = (int64_t)*ap++;
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}
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break;
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case nsXPTType::T_U8:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.u8 = (uint8_t)gprData[next_gpr++];
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} else {
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dp->val.u8 = (uint8_t)*ap++;
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}
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break;
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case nsXPTType::T_U16:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.u16 = (uint16_t)gprData[next_gpr++];
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} else {
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dp->val.u16 = (uint16_t)*ap++;
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}
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break;
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case nsXPTType::T_U32:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.u32 = (uint32_t)gprData[next_gpr++];
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} else {
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dp->val.u32 = (uint32_t)*ap++;
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}
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break;
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case nsXPTType::T_U64:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.u64 = (uint64_t)gprData[next_gpr++];
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} else {
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dp->val.u64 = (uint64_t)*ap++;
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}
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break;
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case nsXPTType::T_FLOAT:
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if (next_fpr < PARAM_FPR_COUNT) {
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memcpy(&dp->val.f, &fprData[next_fpr++], sizeof(dp->val.f));
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} else {
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memcpy(&dp->val.f, ap++, sizeof(dp->val.f));
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}
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break;
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case nsXPTType::T_DOUBLE:
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if (next_fpr < PARAM_FPR_COUNT) {
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memcpy(&dp->val.d, &fprData[next_fpr++], sizeof(dp->val.d));
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} else {
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memcpy(&dp->val.d, ap++, sizeof(dp->val.d));
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}
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break;
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case nsXPTType::T_BOOL:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.b = (bool)gprData[next_gpr++];
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} else {
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dp->val.b = (bool)*ap++;
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}
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break;
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case nsXPTType::T_CHAR:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.c = (char)gprData[next_gpr++];
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} else {
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dp->val.c = (char)*ap++;
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}
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break;
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case nsXPTType::T_WCHAR:
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if (next_gpr < PARAM_GPR_COUNT) {
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dp->val.wc = (wchar_t)gprData[next_gpr++];
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} else {
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dp->val.wc = (wchar_t)*ap++;
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}
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break;
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default:
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NS_ASSERTION(0, "bad type");
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break;
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}
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}
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result = self->mOuter->CallMethod((uint16_t)methodIndex, info, dispatchParams);
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if (dispatchParams != paramBuffer) {
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delete [] dispatchParams;
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}
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return result;
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}
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// Load w17 with the constant 'n' and branch to SharedStub().
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# define STUB_ENTRY(n) \
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__asm__ ( \
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".section \".text\" \n\t" \
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".align 2\n\t" \
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".if "#n" < 10 \n\t" \
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".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
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".hidden _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
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".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \
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"_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
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".elseif "#n" < 100 \n\t" \
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".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
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".hidden _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
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".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \
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"_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
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".elseif "#n" < 1000 \n\t" \
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".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
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".hidden _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
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".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \
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"_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
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".else \n\t" \
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".err \"stub number "#n" >= 1000 not yet supported\"\n" \
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".endif \n\t" \
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"mov w17,#"#n" \n\t" \
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"b SharedStub \n" \
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);
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#define SENTINEL_ENTRY(n) \
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nsresult nsXPTCStubBase::Sentinel##n() \
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{ \
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NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
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return NS_ERROR_NOT_IMPLEMENTED; \
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}
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#include "xptcstubsdef.inc"
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