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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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"
extern "C" nsresult ATTRIBUTE_USED PrepareAndDispatch(nsXPTCStubBase* self,
uint32_t methodIndex,
uint64_t* args,
uint64_t* gpregs,
double* fpregs) {
static const uint32_t GPR_COUNT = 8;
static const uint32_t FPR_COUNT = 8;
nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
const nsXPTMethodInfo* info;
self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
uint32_t paramCount = info->GetParamCount();
const uint8_t indexOfJSContext = info->IndexOfJSContext();
uint64_t* ap = args;
uint32_t nr_gpr = 1; // skip the arg which is 'self'
uint32_t nr_fpr = 0;
uint64_t value;
for (uint32_t i = 0; i < paramCount; i++) {
const nsXPTParamInfo& param = info->GetParam(i);
const nsXPTType& type = param.GetType();
nsXPTCMiniVariant* dp = ¶mBuffer[i];
if (i == indexOfJSContext) {
if (nr_gpr < GPR_COUNT)
nr_gpr++;
else
ap++;
}
if (!param.IsOut() && type == nsXPTType::T_DOUBLE) {
if (nr_fpr < FPR_COUNT) {
dp->val.d = fpregs[nr_fpr++];
} else if (nr_gpr < GPR_COUNT) {
memcpy(&dp->val.d, &gpregs[nr_gpr++], sizeof(dp->val.d));
} else {
memcpy(&dp->val.d, ap++, sizeof(dp->val.d));
}
continue;
}
if (!param.IsOut() && type == nsXPTType::T_FLOAT) {
if (nr_fpr < FPR_COUNT) {
memcpy(&dp->val.f, &fpregs[nr_fpr++], sizeof(dp->val.f));
} else if (nr_gpr < GPR_COUNT) {
memcpy(&dp->val.f, &gpregs[nr_gpr++], sizeof(dp->val.f));
} else {
memcpy(&dp->val.f, ap++, sizeof(dp->val.f));
}
continue;
}
if (nr_gpr < GPR_COUNT) {
value = gpregs[nr_gpr++];
} else {
value = *ap++;
}
if (param.IsOut() || !type.IsArithmetic()) {
dp->val.p = (void*)value;
continue;
}
switch (type) {
case nsXPTType::T_I8:
dp->val.i8 = (int8_t)value;
break;
case nsXPTType::T_I16:
dp->val.i16 = (int16_t)value;
break;
case nsXPTType::T_I32:
dp->val.i32 = (int32_t)value;
break;
case nsXPTType::T_I64:
dp->val.i64 = (int64_t)value;
break;
case nsXPTType::T_U8:
dp->val.u8 = (uint8_t)value;
break;
case nsXPTType::T_U16:
dp->val.u16 = (uint16_t)value;
break;
case nsXPTType::T_U32:
dp->val.u32 = (uint32_t)value;
break;
case nsXPTType::T_U64:
dp->val.u64 = (uint64_t)value;
break;
case nsXPTType::T_BOOL:
dp->val.b = (bool)(uint8_t)value;
break;
case nsXPTType::T_CHAR:
dp->val.c = (char)value;
break;
case nsXPTType::T_WCHAR:
dp->val.wc = (wchar_t)value;
break;
default:
NS_ERROR("bad type");
break;
}
}
nsresult result = self->mOuter->CallMethod((uint16_t)methodIndex, info,
paramBuffer);
return result;
}
// Load $t6 with the constant 'n' and branch to SharedStub().
// clang-format off
#define STUB_ENTRY(n) \
__asm__( \
".text\n\t" \
".if "#n" < 10 \n\t" \
".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
".hidden _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \
"_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
".elseif "#n" < 100 \n\t" \
".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
".hidden _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \
"_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
".elseif "#n" < 1000 \n\t" \
".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
".hidden _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \
"_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
".else \n\t" \
".err \"stub number "#n" >= 1000 not yet supported\"\n" \
".endif \n\t" \
"li.d $t6, "#n" \n\t" \
"b SharedStub \n" \
".if "#n" < 10 \n\t" \
".size _ZN14nsXPTCStubBase5Stub"#n"Ev,.-_ZN14nsXPTCStubBase5Stub"#n"Ev\n\t" \
".elseif "#n" < 100 \n\t" \
".size _ZN14nsXPTCStubBase6Stub"#n"Ev,.-_ZN14nsXPTCStubBase6Stub"#n"Ev\n\t" \
".else \n\t" \
".size _ZN14nsXPTCStubBase7Stub"#n"Ev,.-_ZN14nsXPTCStubBase7Stub"#n"Ev\n\t" \
".endif" \
);
// clang-format on
#define SENTINEL_ENTRY(n) \
nsresult nsXPTCStubBase::Sentinel##n() { \
NS_ERROR("nsXPTCStubBase::Sentinel called"); \
return NS_ERROR_NOT_IMPLEMENTED; \
}
#include "xptcstubsdef.inc"