зеркало из https://github.com/mozilla/gecko-dev.git
139 строки
4.3 KiB
C++
139 строки
4.3 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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/* Implement shared vtbl methods. */
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#include "xptcprivate.h"
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#include "xptc_gcc_x86_unix.h"
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extern "C" {
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static nsresult ATTRIBUTE_USED
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__attribute__ ((regparm (3)))
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PrepareAndDispatch(uint32_t methodIndex, nsXPTCStubBase* self, uint32_t* args)
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{
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#define PARAM_BUFFER_COUNT 16
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nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
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nsXPTCMiniVariant* dispatchParams = nullptr;
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const nsXPTMethodInfo* info;
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uint8_t paramCount;
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uint8_t i;
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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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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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NS_ASSERTION(dispatchParams,"no place for params");
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uint32_t* ap = args;
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for(i = 0; i < paramCount; i++, ap++)
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{
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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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{
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dp->val.p = (void*) *ap;
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continue;
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}
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// else
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dp->val.p = (void*) *ap;
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switch(type)
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{
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case nsXPTType::T_I64 : dp->val.i64 = *((int64_t*) ap); ap++; break;
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case nsXPTType::T_U64 : dp->val.u64 = *((uint64_t*)ap); ap++; break;
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case nsXPTType::T_DOUBLE : dp->val.d = *((double*) ap); ap++; 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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return result;
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}
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} // extern "C"
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#if !defined(XP_MACOSX)
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#define STUB_HEADER(a, b) ".hidden " SYMBOL_UNDERSCORE "_ZN14nsXPTCStubBase" #a "Stub" #b "Ev\n\t" \
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".type " SYMBOL_UNDERSCORE "_ZN14nsXPTCStubBase" #a "Stub" #b "Ev,@function\n"
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#define STUB_SIZE(a, b) ".size " SYMBOL_UNDERSCORE "_ZN14nsXPTCStubBase" #a "Stub" #b "Ev,.-" SYMBOL_UNDERSCORE "_ZN14nsXPTCStubBase" #a "Stub" #b "Ev\n\t"
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#else
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#define STUB_HEADER(a, b)
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#define STUB_SIZE(a, b)
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#endif
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// gcc3 mangling tends to insert the length of the method name
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#define STUB_ENTRY(n) \
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asm(".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 " SYMBOL_UNDERSCORE "_ZN14nsXPTCStubBase5Stub" #n "Ev\n\t" \
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STUB_HEADER(5, n) \
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SYMBOL_UNDERSCORE "_ZN14nsXPTCStubBase5Stub" #n "Ev:\n\t" \
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".elseif " #n " < 100\n\t" \
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".globl " SYMBOL_UNDERSCORE "_ZN14nsXPTCStubBase6Stub" #n "Ev\n\t" \
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STUB_HEADER(6, n) \
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SYMBOL_UNDERSCORE "_ZN14nsXPTCStubBase6Stub" #n "Ev:\n\t" \
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".elseif " #n " < 1000\n\t" \
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".globl " SYMBOL_UNDERSCORE "_ZN14nsXPTCStubBase7Stub" #n "Ev\n\t" \
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STUB_HEADER(7, n) \
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SYMBOL_UNDERSCORE "_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\t" \
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".endif\n\t" \
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"movl $" #n ", %eax\n\t" \
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"jmp " SYMBOL_UNDERSCORE "SharedStub\n\t" \
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".if " #n " < 10\n\t" \
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STUB_SIZE(5, n) \
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".elseif " #n " < 100\n\t" \
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STUB_SIZE(6, n) \
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".else\n\t" \
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STUB_SIZE(7, n) \
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".endif");
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// static nsresult SharedStub(uint32_t methodIndex) __attribute__((regparm(1)))
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asm(".text\n\t"
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".align 2\n\t"
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#if !defined(XP_MACOSX)
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".type " SYMBOL_UNDERSCORE "SharedStub,@function\n\t"
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#endif
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SYMBOL_UNDERSCORE "SharedStub:\n\t"
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"leal 0x08(%esp), %ecx\n\t"
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"movl 0x04(%esp), %edx\n\t"
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"jmp " SYMBOL_UNDERSCORE "PrepareAndDispatch\n\t"
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#if !defined(XP_MACOSX)
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".size " SYMBOL_UNDERSCORE "SharedStub,.-" SYMBOL_UNDERSCORE "SharedStub"
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#endif
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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_ERROR("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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void
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xptc_dummy()
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{
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}
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