/* -*- 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" // The Linux/PPC64 ABI passes the first 8 integral // parameters and the first 13 floating point parameters in registers // (r3-r10 and f1-f13), no stack space is allocated for these by the // caller. The rest of the parameters are passed in the caller's stack // area. The stack pointer has to retain 16-byte alignment. // The PowerPC64 platform ABI can be found here: // http://www.freestandards.org/spec/ELF/ppc64/ // and in particular: // http://www.freestandards.org/spec/ELF/ppc64/PPC-elf64abi-1.9.html#FUNC-CALL #define PARAM_BUFFER_COUNT 16 #define GPR_COUNT 7 #define FPR_COUNT 13 // PrepareAndDispatch() is called by SharedStub() and calls the actual method. // // - 'args[]' contains the arguments passed on stack // - 'gprData[]' contains the arguments passed in integer registers // - 'fprData[]' contains the arguments passed in floating point registers // // The parameters are mapped into an array of type 'nsXPTCMiniVariant' // and then the method gets called. #include extern "C" nsresult ATTRIBUTE_USED PrepareAndDispatch(nsXPTCStubBase* self, uint64_t methodIndex, uint64_t* args, uint64_t *gprData, double *fprData) { nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT]; nsXPTCMiniVariant* dispatchParams = nullptr; const nsXPTMethodInfo* info; uint32_t paramCount; uint32_t i; nsresult result = NS_ERROR_FAILURE; NS_ASSERTION(self,"no self"); self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info); NS_ASSERTION(info,"no method info"); if (! info) return NS_ERROR_UNEXPECTED; 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"); if (! dispatchParams) return NS_ERROR_OUT_OF_MEMORY; uint64_t* ap = args; uint64_t tempu64; for(i = 0; i < paramCount; i++) { const nsXPTParamInfo& param = info->GetParam(i); const nsXPTType& type = param.GetType(); nsXPTCMiniVariant* dp = &dispatchParams[i]; if (!param.IsOut() && type == nsXPTType::T_DOUBLE) { if (i < FPR_COUNT) dp->val.d = fprData[i]; else dp->val.d = *(double*) ap; } else if (!param.IsOut() && type == nsXPTType::T_FLOAT) { if (i < FPR_COUNT) dp->val.f = (float) fprData[i]; // in registers floats are passed as doubles else { float *p = (float *)ap; #ifndef __LITTLE_ENDIAN__ p++; #endif dp->val.f = *p; } } else { /* integer type or pointer */ if (i < GPR_COUNT) tempu64 = gprData[i]; else tempu64 = *ap; if (param.IsOut() || !type.IsArithmetic()) dp->val.p = (void*) tempu64; else if (type == nsXPTType::T_I8) dp->val.i8 = (int8_t) tempu64; else if (type == nsXPTType::T_I16) dp->val.i16 = (int16_t) tempu64; else if (type == nsXPTType::T_I32) dp->val.i32 = (int32_t) tempu64; else if (type == nsXPTType::T_I64) dp->val.i64 = (int64_t) tempu64; else if (type == nsXPTType::T_U8) dp->val.u8 = (uint8_t) tempu64; else if (type == nsXPTType::T_U16) dp->val.u16 = (uint16_t) tempu64; else if (type == nsXPTType::T_U32) dp->val.u32 = (uint32_t) tempu64; else if (type == nsXPTType::T_U64) dp->val.u64 = (uint64_t) tempu64; else if (type == nsXPTType::T_BOOL) dp->val.b = (bool) tempu64; else if (type == nsXPTType::T_CHAR) dp->val.c = (char) tempu64; else if (type == nsXPTType::T_WCHAR) dp->val.wc = (wchar_t) tempu64; else NS_ERROR("bad type"); } if (i >= 7) ap++; } result = self->mOuter->CallMethod((uint16_t) methodIndex, info, dispatchParams); if (dispatchParams != paramBuffer) delete [] dispatchParams; return result; } // Load r11 with the constant 'n' and branch to SharedStub(). // // XXX Yes, it's ugly that we're relying on gcc's name-mangling here; // however, it's quick, dirty, and'll break when the ABI changes on // us, which is what we want ;-). // gcc-3 version // // As G++3 ABI contains the length of the functionname in the mangled // name, it is difficult to get a generic assembler mechanism like // in the G++ 2.95 case. // Create names would be like: // _ZN14nsXPTCStubBase5Stub1Ev // _ZN14nsXPTCStubBase6Stub12Ev // _ZN14nsXPTCStubBase7Stub123Ev // _ZN14nsXPTCStubBase8Stub1234Ev // etc. // Use assembler directives to get the names right... #if _CALL_ELF == 2 # define STUB_ENTRY(n) \ __asm__ ( \ ".section \".text\" \n\t" \ ".align 2 \n\t" \ ".if "#n" < 10 \n\t" \ ".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \ ".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \ "_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \ "0: addis 2,12,.TOC.-0b@ha \n\t" \ "addi 2,2,.TOC.-0b@l \n\t" \ ".localentry _ZN14nsXPTCStubBase5Stub"#n"Ev,.-_ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \ \ ".elseif "#n" < 100 \n\t" \ ".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \ ".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \ "_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \ "0: addis 2,12,.TOC.-0b@ha \n\t" \ "addi 2,2,.TOC.-0b@l \n\t" \ ".localentry _ZN14nsXPTCStubBase6Stub"#n"Ev,.-_ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \ \ ".elseif "#n" < 1000 \n\t" \ ".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \ ".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \ "_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \ "0: addis 2,12,.TOC.-0b@ha \n\t" \ "addi 2,2,.TOC.-0b@l \n\t" \ ".localentry _ZN14nsXPTCStubBase7Stub"#n"Ev,.-_ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \ \ ".else \n\t" \ ".err \"stub number "#n" >= 1000 not yet supported\"\n" \ ".endif \n\t" \ \ "li 11,"#n" \n\t" \ "b SharedStub \n" \ ); #else # define STUB_ENTRY(n) \ __asm__ ( \ ".section \".toc\",\"aw\" \n\t" \ ".section \".text\" \n\t" \ ".align 2 \n\t" \ ".if "#n" < 10 \n\t" \ ".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \ ".section \".opd\",\"aw\" \n\t" \ ".align 3 \n\t" \ "_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \ ".quad ._ZN14nsXPTCStubBase5Stub"#n"Ev,.TOC.@tocbase \n\t" \ ".previous \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" \ ".section \".opd\",\"aw\" \n\t" \ ".align 3 \n\t" \ "_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \ ".quad ._ZN14nsXPTCStubBase6Stub"#n"Ev,.TOC.@tocbase \n\t" \ ".previous \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" \ ".section \".opd\",\"aw\" \n\t" \ ".align 3 \n\t" \ "_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \ ".quad ._ZN14nsXPTCStubBase7Stub"#n"Ev,.TOC.@tocbase \n\t" \ ".previous \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 11,"#n" \n\t" \ "b SharedStub \n" \ ); #endif #define SENTINEL_ENTRY(n) \ nsresult nsXPTCStubBase::Sentinel##n() \ { \ NS_ERROR("nsXPTCStubBase::Sentinel called"); \ return NS_ERROR_NOT_IMPLEMENTED; \ } #include "xptcstubsdef.inc"