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/* -*- 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
#include "xptcprivate.h"
/*
* This is for Windows 64 bit (x86_64) using GCC syntax
* Code was copied from the MSVC version.
*/
#if !defined(_AMD64_) || !defined(__GNUC__)
# error xptcstubs_x86_64_gnu.cpp being used unexpectedly
#endif
extern "C" nsresult __attribute__((__used__))
PrepareAndDispatch(nsXPTCStubBase * self, uint32_t methodIndex,
uint64_t * args, uint64_t * gprData, double *fprData)
{
//
// "this" pointer is first parameter, so parameter count is 3.
//
#define PARAM_GPR_COUNT 3
#define PARAM_FPR_COUNT 3
nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
const nsXPTMethodInfo* info = nullptr;
uint8_t paramCount;
uint8_t i;
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
//
const uint8_t indexOfJSContext = info->IndexOfJSContext();
uint64_t* ap = args;
uint32_t iCount = 0;
for(i = 0; i < paramCount; i++)
{
const nsXPTParamInfo& param = info->GetParam(i);
const nsXPTType& type = param.GetType();
nsXPTCMiniVariant* dp = ¶mBuffer[i];
if (i == indexOfJSContext) {
if (iCount < PARAM_GPR_COUNT)
iCount++;
else
ap++;
}
if(param.IsOut() || !type.IsArithmetic())
{
if (iCount < PARAM_GPR_COUNT)
dp->val.p = (void*)gprData[iCount++];
else
dp->val.p = (void*)*ap++;
continue;
}
// else
switch(type)
{
case nsXPTType::T_I8:
if (iCount < PARAM_GPR_COUNT)
dp->val.i8 = (int8_t)gprData[iCount++];
else
dp->val.i8 = *((int8_t*)ap++);
break;
case nsXPTType::T_I16:
if (iCount < PARAM_GPR_COUNT)
dp->val.i16 = (int16_t)gprData[iCount++];
else
dp->val.i16 = *((int16_t*)ap++);
break;
case nsXPTType::T_I32:
if (iCount < PARAM_GPR_COUNT)
dp->val.i32 = (int32_t)gprData[iCount++];
else
dp->val.i32 = *((int32_t*)ap++);
break;
case nsXPTType::T_I64:
if (iCount < PARAM_GPR_COUNT)
dp->val.i64 = (int64_t)gprData[iCount++];
else
dp->val.i64 = *((int64_t*)ap++);
break;
case nsXPTType::T_U8:
if (iCount < PARAM_GPR_COUNT)
dp->val.u8 = (uint8_t)gprData[iCount++];
else
dp->val.u8 = *((uint8_t*)ap++);
break;
case nsXPTType::T_U16:
if (iCount < PARAM_GPR_COUNT)
dp->val.u16 = (uint16_t)gprData[iCount++];
else
dp->val.u16 = *((uint16_t*)ap++);
break;
case nsXPTType::T_U32:
if (iCount < PARAM_GPR_COUNT)
dp->val.u32 = (uint32_t)gprData[iCount++];
else
dp->val.u32 = *((uint32_t*)ap++);
break;
case nsXPTType::T_U64:
if (iCount < PARAM_GPR_COUNT)
dp->val.u64 = (uint64_t)gprData[iCount++];
else
dp->val.u64 = *((uint64_t*)ap++);
break;
case nsXPTType::T_FLOAT:
if (iCount < PARAM_FPR_COUNT)
// The value in xmm register is already prepared to
// be retrieved as a float. Therefore, we pass the
// value verbatim, as a double without conversion.
dp->val.d = (double)fprData[iCount++];
else
dp->val.f = *((float*)ap++);
break;
case nsXPTType::T_DOUBLE:
if (iCount < PARAM_FPR_COUNT)
dp->val.d = (double)fprData[iCount++];
else
dp->val.d = *((double*)ap++);
break;
case nsXPTType::T_BOOL:
if (iCount < PARAM_GPR_COUNT)
// We need the cast to uint8_t to remove garbage on upper 56-bit
// at first.
dp->val.b = (bool)(uint8_t)gprData[iCount++];
else
dp->val.b = *((bool*)ap++);
break;
case nsXPTType::T_CHAR:
if (iCount < PARAM_GPR_COUNT)
dp->val.c = (char)gprData[iCount++];
else
dp->val.c = *((char*)ap++);
break;
case nsXPTType::T_WCHAR:
if (iCount < PARAM_GPR_COUNT)
dp->val.wc = (wchar_t)gprData[iCount++];
else
dp->val.wc = *((wchar_t*)ap++);
break;
default:
NS_ASSERTION(0, "bad type");
break;
}
}
nsresult result = self->mOuter->CallMethod((uint16_t)methodIndex, info,
paramBuffer);
return result;
}
__asm__ (
".text\n"
".intel_syntax noprefix\n" /* switch to Intel syntax to look like the MSVC assembly */
".globl SharedStub\n"
".def SharedStub ; .scl 3 ; .type 46 ; .endef \n"
"SharedStub:\n"
"sub rsp, 104\n"
/* rcx is this pointer. Need backup for optimized build */
"mov qword ptr [rsp+88], rcx\n"
/*
* fist 4 parameters (1st is "this" pointer) are passed in registers.
*/
/* for floating value */
"movsd qword ptr [rsp+64], xmm1\n"
"movsd qword ptr [rsp+72], xmm2\n"
"movsd qword ptr [rsp+80], xmm3\n"
/* for integer value */
"mov qword ptr [rsp+40], rdx\n"
"mov qword ptr [rsp+48], r8\n"
"mov qword ptr [rsp+56], r9\n"
/*
* Call PrepareAndDispatch function
*/
/* 5th parameter (floating parameters) of PrepareAndDispatch */
"lea r9, qword ptr [rsp+64]\n"
"mov qword ptr [rsp+32], r9\n"
/* 4th parameter (normal parameters) of PrepareAndDispatch */
"lea r9, qword ptr [rsp+40]\n"
/* 3rd parameter (pointer to args on stack) */
"lea r8, qword ptr [rsp+40+104]\n"
/* 2nd parameter (vtbl_index) */
"mov rdx, r11\n"
/* 1st parameter (this) (rcx) */
"call PrepareAndDispatch\n"
/* restore rcx */
"mov rcx, qword ptr [rsp+88]\n"
/*
* clean up register
*/
"add rsp, 104+8\n"
/* set return address */
"mov rdx, qword ptr [rsp-8]\n"
/* simulate __stdcall return */
"jmp rdx\n"
/* back to AT&T syntax */
".att_syntax\n"
);
#define STUB_ENTRY(n) \
asm(".intel_syntax noprefix\n" /* this is in intel syntax */ \
".text\n" \
".align 2\n" \
".if " #n " < 10\n" \
".globl _ZN14nsXPTCStubBase5Stub" #n "Ev\n" \
".def _ZN14nsXPTCStubBase5Stub" #n "Ev\n" \
".scl 2\n" /* external */ \
".type 46\n" /* function returning unsigned int */ \
".endef\n" \
"_ZN14nsXPTCStubBase5Stub" #n "Ev:\n" \
".elseif " #n " < 100\n" \
".globl _ZN14nsXPTCStubBase6Stub" #n "Ev\n" \
".def _ZN14nsXPTCStubBase6Stub" #n "Ev\n" \
".scl 2\n" /* external */\
".type 46\n" /* function returning unsigned int */ \
".endef\n" \
"_ZN14nsXPTCStubBase6Stub" #n "Ev:\n" \
".elseif " #n " < 1000\n" \
".globl _ZN14nsXPTCStubBase7Stub" #n "Ev\n" \
".def _ZN14nsXPTCStubBase7Stub" #n "Ev\n" \
".scl 2\n" /* external */ \
".type 46\n" /* function returning unsigned int */ \
".endef\n" \
"_ZN14nsXPTCStubBase7Stub" #n "Ev:\n" \
".else\n" \
".err \"stub number " #n " >= 1000 not yet supported\"\n" \
".endif\n" \
"mov r11, " #n "\n" \
"jmp SharedStub\n" \
".att_syntax\n" /* back to AT&T syntax */ \
"");
#define SENTINEL_ENTRY(n) \
nsresult nsXPTCStubBase::Sentinel##n() \
{ \
NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
return NS_ERROR_NOT_IMPLEMENTED; \
}
#include "xptcstubsdef.inc"