Add m-esr52 at 52.6.0

1 files changed, 227 insertions, 0 deletions

diff --git a/xpcom/reflect/xptcall/md/win32/xptcstubs.cpp b/xpcom/reflect/xptcall/md/win32/xptcstubs.cpp
new file mode 100644
index 0000000000..e525aebd74
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/win32/xptcstubs.cpp
@@ -0,0 +1,227 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Implement shared vtbl methods. */
+
+#include "xptcprivate.h"
+#include "xptiprivate.h"
+
+#ifndef WIN32
+#error "This code is for Win32 only"
+#endif
+
+extern "C" {
+
+#if !defined(__GNUC__) && !defined(__clang__)
+static
+#endif
+nsresult __stdcall
+PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex,
+                   uint32_t* args, uint32_t* stackBytesToPop)
+{
+#define PARAM_BUFFER_COUNT     16
+
+    nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
+    nsXPTCMiniVariant* dispatchParams = nullptr;
+    const nsXPTMethodInfo* info = nullptr;
+    uint8_t paramCount;
+    uint8_t i;
+    nsresult result = NS_ERROR_FAILURE;
+
+    // If anything fails before stackBytesToPop can be set then
+    // the failure is completely catastrophic!
+
+    NS_ASSERTION(self,"no self");
+
+    self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
+    NS_ASSERTION(info,"no method 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");
+
+    uint32_t* ap = args;
+    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  = *((int8_t*)  ap);       break;
+        case nsXPTType::T_I16    : dp->val.i16 = *((int16_t*) ap);       break;
+        case nsXPTType::T_I32    : dp->val.i32 = *((int32_t*) ap);       break;
+        case nsXPTType::T_I64    : dp->val.i64 = *((int64_t*) ap); ap++; break;
+        case nsXPTType::T_U8     : dp->val.u8  = *((uint8_t*) ap);       break;
+        case nsXPTType::T_U16    : dp->val.u16 = *((uint16_t*)ap);       break;
+        case nsXPTType::T_U32    : dp->val.u32 = *((uint32_t*)ap);       break;
+        case nsXPTType::T_U64    : dp->val.u64 = *((uint64_t*)ap); ap++; break;
+        case nsXPTType::T_FLOAT  : dp->val.f   = *((float*)   ap);       break;
+        case nsXPTType::T_DOUBLE : dp->val.d   = *((double*)  ap); ap++; break;
+        case nsXPTType::T_BOOL   : dp->val.b   = *((bool*)  ap);       break;
+        case nsXPTType::T_CHAR   : dp->val.c   = *((char*)    ap);       break;
+        case nsXPTType::T_WCHAR  : dp->val.wc  = *((wchar_t*) ap);       break;
+        default:
+            NS_ERROR("bad type");
+            break;
+        }
+    }
+    *stackBytesToPop = ((uint32_t)ap) - ((uint32_t)args);
+
+    result = self->mOuter->CallMethod((uint16_t)methodIndex, info, dispatchParams);
+
+    if(dispatchParams != paramBuffer)
+        delete [] dispatchParams;
+
+    return result;
+}
+
+} // extern "C"
+
+// declspec(naked) is broken in gcc and clang-cl
+#if !defined(__GNUC__) && !defined(__clang__)
+static 
+__declspec(naked)
+void SharedStub(void)
+{
+    __asm {
+        push ebp            // set up simple stack frame
+        mov  ebp, esp       // stack has: ebp/vtbl_index/retaddr/this/args
+        push ecx            // make room for a ptr
+        lea  eax, [ebp-4]   // pointer to stackBytesToPop
+        push eax
+        lea  eax, [ebp+12]  // pointer to args
+        push eax
+        push ecx            // vtbl_index
+        mov  eax, [ebp+8]   // this
+        push eax
+        call PrepareAndDispatch
+        mov  edx, [ebp+4]   // return address
+        mov  ecx, [ebp-4]   // stackBytesToPop
+        add  ecx, 8         // for 'this' and return address
+        mov  esp, ebp
+        pop  ebp
+        add  esp, ecx       // fix up stack pointer
+        jmp  edx            // simulate __stdcall return
+    }
+}
+
+// these macros get expanded (many times) in the file #included below
+#define STUB_ENTRY(n) \
+__declspec(naked) nsresult __stdcall nsXPTCStubBase::Stub##n() \
+{ __asm mov ecx, n __asm jmp SharedStub }
+
+#else
+
+asm(".text\n\t"
+    ".align     4\n\t"
+    "SharedStub:\n\t"
+    "push       %ebp\n\t"
+    "mov        %esp, %ebp\n\t"
+    "push       %ecx\n\t"
+    "lea        -4(%ebp), %eax\n\t"
+    "push       %eax\n\t"
+    "lea        12(%ebp), %eax\n\t"
+    "push       %eax\n\t"
+    "push       %ecx\n\t"
+    "movl       8(%ebp), %eax\n\t"
+    "push       %eax\n\t"
+    "call       _PrepareAndDispatch@16\n\t"
+    "mov        4(%ebp), %edx\n\t"
+    "mov        -4(%ebp), %ecx\n\t"
+    "add        $8, %ecx\n\t"
+    "mov        %ebp, %esp\n\t"
+    "pop        %ebp\n\t"
+    "add        %ecx, %esp\n\t"
+    "jmp        *%edx"
+);
+
+// The clang-cl specific code below is required because mingw uses the gcc name
+// mangling, but clang-cl implements the MSVC name mangling.
+
+#ifdef __clang__
+
+#define STUB_ENTRY(n) \
+asm(".text\n\t" \
+    ".align     4\n\t" \
+    ".globl     \"?Stub" #n "@nsXPTCStubBase@@UAG?AW4nsresult@@XZ\"\n\t" \
+    ".def       \"?Stub" #n "@nsXPTCStubBase@@UAG?AW4nsresult@@XZ\"; \n\t" \
+    ".scl       2\n\t" \
+    ".type      46\n\t" \
+    ".endef\n\t" \
+    "\"?Stub" #n "@nsXPTCStubBase@@UAG?AW4nsresult@@XZ\":\n\t" \
+    "mov $" #n ", %ecx\n\t" \
+    "jmp SharedStub");
+
+#else
+
+#define STUB_ENTRY(n) \
+asm(".text\n\t" \
+    ".align     4\n\t" \
+    ".if	" #n " < 10\n\t" \
+    ".globl     __ZN14nsXPTCStubBase5Stub" #n "Ev@4\n\t" \
+    ".def       __ZN14nsXPTCStubBase5Stub" #n "Ev@4; \n\t" \
+    ".scl       3\n\t" \
+    ".type      46\n\t" \
+    ".endef\n\t" \
+    "__ZN14nsXPTCStubBase5Stub" #n "Ev@4:\n\t" \
+    ".elseif	" #n " < 100\n\t" \
+    ".globl     __ZN14nsXPTCStubBase6Stub" #n "Ev@4\n\t" \
+    ".def       __ZN14nsXPTCStubBase6Stub" #n "Ev@4\n\t" \
+    ".scl       3\n\t" \
+    ".type      46\n\t" \
+    ".endef\n\t" \
+    "__ZN14nsXPTCStubBase6Stub" #n "Ev@4:\n\t" \
+    ".elseif    " #n " < 1000\n\t" \
+    ".globl     __ZN14nsXPTCStubBase7Stub" #n "Ev@4\n\t" \
+    ".def       __ZN14nsXPTCStubBase7Stub" #n "Ev@4\n\t" \
+    ".scl       3\n\t" \
+    ".type      46\n\t" \
+    ".endef\n\t" \
+    "__ZN14nsXPTCStubBase7Stub" #n "Ev@4:\n\t" \
+    ".else\n\t" \
+    ".err	\"stub number " #n " >= 1000 not yet supported\"\n\t" \
+    ".endif\n\t" \
+    "mov $" #n ", %ecx\n\t" \
+    "jmp SharedStub");
+
+#endif
+
+#endif /* __GNUC__ || __clang__ */
+
+#define SENTINEL_ENTRY(n) \
+nsresult __stdcall nsXPTCStubBase::Sentinel##n() \
+{ \
+    NS_ERROR("nsXPTCStubBase::Sentinel called"); \
+    return NS_ERROR_NOT_IMPLEMENTED; \
+}
+
+#ifdef _MSC_VER
+#pragma warning(disable : 4035) // OK to have no return value
+#endif
+#include "xptcstubsdef.inc"
+#ifdef _MSC_VER
+#pragma warning(default : 4035) // restore default
+#endif
+
+void
+#ifdef __GNUC__
+__cdecl
+#endif
+xptc_dummy()
+{
+}