michael@0: /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- michael@0: * michael@0: * This Source Code Form is subject to the terms of the Mozilla Public michael@0: * License, v. 2.0. If a copy of the MPL was not distributed with this michael@0: * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ michael@0: michael@0: // Implement shared vtbl methods. michael@0: michael@0: // Keep this in sync with the darwin version. michael@0: michael@0: #include "xptcprivate.h" michael@0: #include "xptiprivate.h" michael@0: michael@0: // The Linux/x86-64 ABI passes the first 6 integer parameters and the michael@0: // first 8 floating point parameters in registers (rdi, rsi, rdx, rcx, michael@0: // r8, r9 and xmm0-xmm7), no stack space is allocated for these by the michael@0: // caller. The rest of the parameters are passed in the callers stack michael@0: // area. michael@0: michael@0: const uint32_t PARAM_BUFFER_COUNT = 16; michael@0: const uint32_t GPR_COUNT = 6; michael@0: const uint32_t FPR_COUNT = 8; michael@0: michael@0: // PrepareAndDispatch() is called by SharedStub() and calls the actual method. michael@0: // michael@0: // - 'args[]' contains the arguments passed on stack michael@0: // - 'gpregs[]' contains the arguments passed in integer registers michael@0: // - 'fpregs[]' contains the arguments passed in floating point registers michael@0: // michael@0: // The parameters are mapped into an array of type 'nsXPTCMiniVariant' michael@0: // and then the method gets called. michael@0: michael@0: extern "C" nsresult ATTRIBUTE_USED michael@0: PrepareAndDispatch(nsXPTCStubBase * self, uint32_t methodIndex, michael@0: uint64_t * args, uint64_t * gpregs, double *fpregs) michael@0: { michael@0: nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT]; michael@0: nsXPTCMiniVariant* dispatchParams = nullptr; michael@0: const nsXPTMethodInfo* info; michael@0: uint32_t paramCount; michael@0: uint32_t i; michael@0: nsresult result = NS_ERROR_FAILURE; michael@0: michael@0: NS_ASSERTION(self,"no self"); michael@0: michael@0: self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info); michael@0: NS_ASSERTION(info,"no method info"); michael@0: if (!info) michael@0: return NS_ERROR_UNEXPECTED; michael@0: michael@0: paramCount = info->GetParamCount(); michael@0: michael@0: // setup variant array pointer michael@0: if (paramCount > PARAM_BUFFER_COUNT) michael@0: dispatchParams = new nsXPTCMiniVariant[paramCount]; michael@0: else michael@0: dispatchParams = paramBuffer; michael@0: michael@0: NS_ASSERTION(dispatchParams,"no place for params"); michael@0: if (!dispatchParams) michael@0: return NS_ERROR_OUT_OF_MEMORY; michael@0: michael@0: uint64_t* ap = args; michael@0: uint32_t nr_gpr = 1; // skip one GPR register for 'that' michael@0: uint32_t nr_fpr = 0; michael@0: uint64_t value; michael@0: michael@0: for (i = 0; i < paramCount; i++) { michael@0: const nsXPTParamInfo& param = info->GetParam(i); michael@0: const nsXPTType& type = param.GetType(); michael@0: nsXPTCMiniVariant* dp = &dispatchParams[i]; michael@0: michael@0: if (!param.IsOut() && type == nsXPTType::T_DOUBLE) { michael@0: if (nr_fpr < FPR_COUNT) michael@0: dp->val.d = fpregs[nr_fpr++]; michael@0: else michael@0: dp->val.d = *(double*) ap++; michael@0: continue; michael@0: } michael@0: else if (!param.IsOut() && type == nsXPTType::T_FLOAT) { michael@0: if (nr_fpr < FPR_COUNT) michael@0: // The value in %xmm register is already prepared to michael@0: // be retrieved as a float. Therefore, we pass the michael@0: // value verbatim, as a double without conversion. michael@0: dp->val.d = fpregs[nr_fpr++]; michael@0: else michael@0: dp->val.f = *(float*) ap++; michael@0: continue; michael@0: } michael@0: else { michael@0: if (nr_gpr < GPR_COUNT) michael@0: value = gpregs[nr_gpr++]; michael@0: else michael@0: value = *ap++; michael@0: } michael@0: michael@0: if (param.IsOut() || !type.IsArithmetic()) { michael@0: dp->val.p = (void*) value; michael@0: continue; michael@0: } michael@0: michael@0: switch (type) { michael@0: case nsXPTType::T_I8: dp->val.i8 = (int8_t) value; break; michael@0: case nsXPTType::T_I16: dp->val.i16 = (int16_t) value; break; michael@0: case nsXPTType::T_I32: dp->val.i32 = (int32_t) value; break; michael@0: case nsXPTType::T_I64: dp->val.i64 = (int64_t) value; break; michael@0: case nsXPTType::T_U8: dp->val.u8 = (uint8_t) value; break; michael@0: case nsXPTType::T_U16: dp->val.u16 = (uint16_t) value; break; michael@0: case nsXPTType::T_U32: dp->val.u32 = (uint32_t) value; break; michael@0: case nsXPTType::T_U64: dp->val.u64 = (uint64_t) value; break; michael@0: // Cast to uint8_t first, to remove garbage on upper 56 bits. michael@0: case nsXPTType::T_BOOL: dp->val.b = (bool)(uint8_t) value; break; michael@0: case nsXPTType::T_CHAR: dp->val.c = (char) value; break; michael@0: case nsXPTType::T_WCHAR: dp->val.wc = (wchar_t) value; break; michael@0: michael@0: default: michael@0: NS_ERROR("bad type"); michael@0: break; michael@0: } michael@0: } michael@0: michael@0: result = self->mOuter->CallMethod((uint16_t) methodIndex, info, dispatchParams); michael@0: michael@0: if (dispatchParams != paramBuffer) michael@0: delete [] dispatchParams; michael@0: michael@0: return result; michael@0: } michael@0: michael@0: #define STUB_ENTRY(n) michael@0: michael@0: #define SENTINEL_ENTRY(n) \ michael@0: nsresult nsXPTCStubBase::Sentinel##n() \ michael@0: { \ michael@0: NS_ERROR("nsXPTCStubBase::Sentinel called"); \ michael@0: return NS_ERROR_NOT_IMPLEMENTED; \ michael@0: } michael@0: michael@0: #include "xptcstubsdef.inc"