mirror of
https://repo.dactyloidae.xyz/Dactyloidae/UXP.git
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227 lines
6.9 KiB
C++
227 lines
6.9 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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/* Implement shared vtbl methods. */
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#include "xptcprivate.h"
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#include "xptiprivate.h"
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#ifndef WIN32
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#error "This code is for Win32 only"
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#endif
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extern "C" {
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#if !defined(__GNUC__) && !defined(__clang__)
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static
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#endif
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nsresult __stdcall
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PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex,
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uint32_t* args, uint32_t* stackBytesToPop)
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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 = nullptr;
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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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// If anything fails before stackBytesToPop can be set then
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// the failure is completely catastrophic!
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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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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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switch(type)
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{
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case nsXPTType::T_I8 : dp->val.i8 = *((int8_t*) ap); break;
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case nsXPTType::T_I16 : dp->val.i16 = *((int16_t*) ap); break;
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case nsXPTType::T_I32 : dp->val.i32 = *((int32_t*) ap); break;
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case nsXPTType::T_I64 : dp->val.i64 = *((int64_t*) ap); ap++; break;
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case nsXPTType::T_U8 : dp->val.u8 = *((uint8_t*) ap); break;
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case nsXPTType::T_U16 : dp->val.u16 = *((uint16_t*)ap); break;
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case nsXPTType::T_U32 : dp->val.u32 = *((uint32_t*)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_FLOAT : dp->val.f = *((float*) ap); break;
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case nsXPTType::T_DOUBLE : dp->val.d = *((double*) ap); ap++; break;
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case nsXPTType::T_BOOL : dp->val.b = *((bool*) ap); break;
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case nsXPTType::T_CHAR : dp->val.c = *((char*) ap); break;
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case nsXPTType::T_WCHAR : dp->val.wc = *((wchar_t*) ap); break;
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default:
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NS_ERROR("bad type");
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break;
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}
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}
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*stackBytesToPop = ((uint32_t)ap) - ((uint32_t)args);
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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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// declspec(naked) is broken in gcc and clang-cl
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#if !defined(__GNUC__) && !defined(__clang__)
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static
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__declspec(naked)
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void SharedStub(void)
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{
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__asm {
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push ebp // set up simple stack frame
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mov ebp, esp // stack has: ebp/vtbl_index/retaddr/this/args
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push ecx // make room for a ptr
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lea eax, [ebp-4] // pointer to stackBytesToPop
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push eax
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lea eax, [ebp+12] // pointer to args
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push eax
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push ecx // vtbl_index
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mov eax, [ebp+8] // this
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push eax
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call PrepareAndDispatch
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mov edx, [ebp+4] // return address
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mov ecx, [ebp-4] // stackBytesToPop
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add ecx, 8 // for 'this' and return address
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mov esp, ebp
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pop ebp
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add esp, ecx // fix up stack pointer
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jmp edx // simulate __stdcall return
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}
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}
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// these macros get expanded (many times) in the file #included below
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#define STUB_ENTRY(n) \
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__declspec(naked) nsresult __stdcall nsXPTCStubBase::Stub##n() \
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{ __asm mov ecx, n __asm jmp SharedStub }
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#else
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asm(".text\n\t"
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".align 4\n\t"
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"SharedStub:\n\t"
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"push %ebp\n\t"
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"mov %esp, %ebp\n\t"
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"push %ecx\n\t"
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"lea -4(%ebp), %eax\n\t"
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"push %eax\n\t"
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"lea 12(%ebp), %eax\n\t"
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"push %eax\n\t"
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"push %ecx\n\t"
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"movl 8(%ebp), %eax\n\t"
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"push %eax\n\t"
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"call _PrepareAndDispatch@16\n\t"
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"mov 4(%ebp), %edx\n\t"
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"mov -4(%ebp), %ecx\n\t"
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"add $8, %ecx\n\t"
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"mov %ebp, %esp\n\t"
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"pop %ebp\n\t"
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"add %ecx, %esp\n\t"
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"jmp *%edx"
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);
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// The clang-cl specific code below is required because mingw uses the gcc name
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// mangling, but clang-cl implements the MSVC name mangling.
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#ifdef __clang__
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#define STUB_ENTRY(n) \
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asm(".text\n\t" \
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".align 4\n\t" \
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".globl \"?Stub" #n "@nsXPTCStubBase@@UAG?AW4nsresult@@XZ\"\n\t" \
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".def \"?Stub" #n "@nsXPTCStubBase@@UAG?AW4nsresult@@XZ\"; \n\t" \
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".scl 2\n\t" \
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".type 46\n\t" \
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".endef\n\t" \
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"\"?Stub" #n "@nsXPTCStubBase@@UAG?AW4nsresult@@XZ\":\n\t" \
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"mov $" #n ", %ecx\n\t" \
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"jmp SharedStub");
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#else
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#define STUB_ENTRY(n) \
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asm(".text\n\t" \
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".align 4\n\t" \
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".if " #n " < 10\n\t" \
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".globl __ZN14nsXPTCStubBase5Stub" #n "Ev@4\n\t" \
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".def __ZN14nsXPTCStubBase5Stub" #n "Ev@4; \n\t" \
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".scl 3\n\t" \
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".type 46\n\t" \
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".endef\n\t" \
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"__ZN14nsXPTCStubBase5Stub" #n "Ev@4:\n\t" \
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".elseif " #n " < 100\n\t" \
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".globl __ZN14nsXPTCStubBase6Stub" #n "Ev@4\n\t" \
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".def __ZN14nsXPTCStubBase6Stub" #n "Ev@4\n\t" \
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".scl 3\n\t" \
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".type 46\n\t" \
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".endef\n\t" \
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"__ZN14nsXPTCStubBase6Stub" #n "Ev@4:\n\t" \
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".elseif " #n " < 1000\n\t" \
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".globl __ZN14nsXPTCStubBase7Stub" #n "Ev@4\n\t" \
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".def __ZN14nsXPTCStubBase7Stub" #n "Ev@4\n\t" \
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".scl 3\n\t" \
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".type 46\n\t" \
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".endef\n\t" \
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"__ZN14nsXPTCStubBase7Stub" #n "Ev@4:\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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"mov $" #n ", %ecx\n\t" \
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"jmp SharedStub");
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#endif
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#endif /* __GNUC__ || __clang__ */
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#define SENTINEL_ENTRY(n) \
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nsresult __stdcall 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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#ifdef _MSC_VER
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#pragma warning(disable : 4035) // OK to have no return value
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#endif
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#include "xptcstubsdef.inc"
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#ifdef _MSC_VER
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#pragma warning(default : 4035) // restore default
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#endif
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void
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#ifdef __GNUC__
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__cdecl
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#endif
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xptc_dummy()
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{
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}
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