1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/xpcom/reflect/xptcall/src/md/unix/xptcstubs_ppc_linux.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,217 @@
1.4 +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +// Implement shared vtbl methods.
1.10 +
1.11 +#include "xptcprivate.h"
1.12 +#include "xptiprivate.h"
1.13 +
1.14 +// The Linux/PPC ABI (aka PPC/SYSV ABI) passes the first 8 integral
1.15 +// parameters and the first 8 floating point parameters in registers
1.16 +// (r3-r10 and f1-f8), no stack space is allocated for these by the
1.17 +// caller. The rest of the parameters are passed in the callers stack
1.18 +// area. The stack pointer has to retain 16-byte alignment, longlongs
1.19 +// and doubles are aligned on 8-byte boundaries.
1.20 +#ifndef __NO_FPRS__
1.21 +#define PARAM_BUFFER_COUNT 16
1.22 +#define GPR_COUNT 8
1.23 +#define FPR_COUNT 8
1.24 +#else
1.25 +#define PARAM_BUFFER_COUNT 8
1.26 +#define GPR_COUNT 8
1.27 +#endif
1.28 +// PrepareAndDispatch() is called by SharedStub() and calls the actual method.
1.29 +//
1.30 +// - 'args[]' contains the arguments passed on stack
1.31 +// - 'gprData[]' contains the arguments passed in integer registers
1.32 +// - 'fprData[]' contains the arguments passed in floating point registers
1.33 +//
1.34 +// The parameters are mapped into an array of type 'nsXPTCMiniVariant'
1.35 +// and then the method gets called.
1.36 +
1.37 +extern "C" nsresult ATTRIBUTE_USED
1.38 +PrepareAndDispatch(nsXPTCStubBase* self,
1.39 + uint32_t methodIndex,
1.40 + uint32_t* args,
1.41 + uint32_t *gprData,
1.42 + double *fprData)
1.43 +{
1.44 + nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
1.45 + nsXPTCMiniVariant* dispatchParams = nullptr;
1.46 + const nsXPTMethodInfo* info = nullptr;
1.47 + uint32_t paramCount;
1.48 + uint32_t i;
1.49 + nsresult result = NS_ERROR_FAILURE;
1.50 +
1.51 + NS_ASSERTION(self,"no self");
1.52 +
1.53 + self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
1.54 + NS_ASSERTION(info,"no method info");
1.55 + if (! info)
1.56 + return NS_ERROR_UNEXPECTED;
1.57 +
1.58 + paramCount = info->GetParamCount();
1.59 +
1.60 + // setup variant array pointer
1.61 + if(paramCount > PARAM_BUFFER_COUNT)
1.62 + dispatchParams = new nsXPTCMiniVariant[paramCount];
1.63 + else
1.64 + dispatchParams = paramBuffer;
1.65 +
1.66 + NS_ASSERTION(dispatchParams,"no place for params");
1.67 + if (! dispatchParams)
1.68 + return NS_ERROR_OUT_OF_MEMORY;
1.69 +
1.70 + uint32_t* ap = args;
1.71 + uint32_t gpr = 1; // skip one GPR register
1.72 +#ifndef __NO_FPRS__
1.73 + uint32_t fpr = 0;
1.74 +#endif
1.75 + uint32_t tempu32;
1.76 + uint64_t tempu64;
1.77 +
1.78 + for(i = 0; i < paramCount; i++) {
1.79 + const nsXPTParamInfo& param = info->GetParam(i);
1.80 + const nsXPTType& type = param.GetType();
1.81 + nsXPTCMiniVariant* dp = &dispatchParams[i];
1.82 +
1.83 + if (!param.IsOut() && type == nsXPTType::T_DOUBLE) {
1.84 +#ifndef __NO_FPRS__
1.85 + if (fpr < FPR_COUNT)
1.86 + dp->val.d = fprData[fpr++];
1.87 +#else
1.88 + if (gpr & 1)
1.89 + gpr++;
1.90 + if (gpr + 1 < GPR_COUNT) {
1.91 + dp->val.d = *(double*) &gprData[gpr];
1.92 + gpr += 2;
1.93 + }
1.94 +#endif
1.95 + else {
1.96 + if ((uint32_t) ap & 4) ap++; // doubles are 8-byte aligned on stack
1.97 + dp->val.d = *(double*) ap;
1.98 + ap += 2;
1.99 + }
1.100 + continue;
1.101 + }
1.102 + else if (!param.IsOut() && type == nsXPTType::T_FLOAT) {
1.103 +#ifndef __NO_FPRS__
1.104 + if (fpr < FPR_COUNT)
1.105 + dp->val.f = (float) fprData[fpr++]; // in registers floats are passed as doubles
1.106 +#else
1.107 + if (gpr < GPR_COUNT)
1.108 + dp->val.f = *(float*) &gprData[gpr++];
1.109 +#endif
1.110 + else
1.111 + dp->val.f = *(float*) ap++;
1.112 + continue;
1.113 + }
1.114 + else if (!param.IsOut() && (type == nsXPTType::T_I64
1.115 + || type == nsXPTType::T_U64)) {
1.116 + if (gpr & 1) gpr++; // longlongs are aligned in odd/even register pairs, eg. r5/r6
1.117 + if ((gpr + 1) < GPR_COUNT) {
1.118 + tempu64 = *(uint64_t*) &gprData[gpr];
1.119 + gpr += 2;
1.120 + }
1.121 + else {
1.122 + if ((uint32_t) ap & 4) ap++; // longlongs are 8-byte aligned on stack
1.123 + tempu64 = *(uint64_t*) ap;
1.124 + ap += 2;
1.125 + }
1.126 + }
1.127 + else {
1.128 + if (gpr < GPR_COUNT)
1.129 + tempu32 = gprData[gpr++];
1.130 + else
1.131 + tempu32 = *ap++;
1.132 + }
1.133 +
1.134 + if(param.IsOut() || !type.IsArithmetic()) {
1.135 + dp->val.p = (void*) tempu32;
1.136 + continue;
1.137 + }
1.138 +
1.139 + switch(type) {
1.140 + case nsXPTType::T_I8: dp->val.i8 = (int8_t) tempu32; break;
1.141 + case nsXPTType::T_I16: dp->val.i16 = (int16_t) tempu32; break;
1.142 + case nsXPTType::T_I32: dp->val.i32 = (int32_t) tempu32; break;
1.143 + case nsXPTType::T_I64: dp->val.i64 = (int64_t) tempu64; break;
1.144 + case nsXPTType::T_U8: dp->val.u8 = (uint8_t) tempu32; break;
1.145 + case nsXPTType::T_U16: dp->val.u16 = (uint16_t) tempu32; break;
1.146 + case nsXPTType::T_U32: dp->val.u32 = (uint32_t) tempu32; break;
1.147 + case nsXPTType::T_U64: dp->val.u64 = (uint64_t) tempu64; break;
1.148 + case nsXPTType::T_BOOL: dp->val.b = (bool) tempu32; break;
1.149 + case nsXPTType::T_CHAR: dp->val.c = (char) tempu32; break;
1.150 + case nsXPTType::T_WCHAR: dp->val.wc = (wchar_t) tempu32; break;
1.151 +
1.152 + default:
1.153 + NS_ERROR("bad type");
1.154 + break;
1.155 + }
1.156 + }
1.157 +
1.158 + result = self->mOuter->CallMethod((uint16_t)methodIndex,
1.159 + info,
1.160 + dispatchParams);
1.161 +
1.162 + if (dispatchParams != paramBuffer)
1.163 + delete [] dispatchParams;
1.164 +
1.165 + return result;
1.166 +}
1.167 +
1.168 +// Load r11 with the constant 'n' and branch to SharedStub().
1.169 +//
1.170 +// XXX Yes, it's ugly that we're relying on gcc's name-mangling here;
1.171 +// however, it's quick, dirty, and'll break when the ABI changes on
1.172 +// us, which is what we want ;-).
1.173 +
1.174 +// gcc-3 version
1.175 +//
1.176 +// As G++3 ABI contains the length of the functionname in the mangled
1.177 +// name, it is difficult to get a generic assembler mechanism like
1.178 +// in the G++ 2.95 case.
1.179 +// Create names would be like:
1.180 +// _ZN14nsXPTCStubBase5Stub1Ev
1.181 +// _ZN14nsXPTCStubBase6Stub12Ev
1.182 +// _ZN14nsXPTCStubBase7Stub123Ev
1.183 +// _ZN14nsXPTCStubBase8Stub1234Ev
1.184 +// etc.
1.185 +// Use assembler directives to get the names right...
1.186 +
1.187 +# define STUB_ENTRY(n) \
1.188 +__asm__ ( \
1.189 + ".align 2 \n\t" \
1.190 + ".if "#n" < 10 \n\t" \
1.191 + ".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
1.192 + ".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \
1.193 +"_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
1.194 + \
1.195 + ".elseif "#n" < 100 \n\t" \
1.196 + ".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
1.197 + ".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \
1.198 +"_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
1.199 + \
1.200 + ".elseif "#n" < 1000 \n\t" \
1.201 + ".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
1.202 + ".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \
1.203 +"_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
1.204 + \
1.205 + ".else \n\t" \
1.206 + ".err \"stub number "#n" >= 1000 not yet supported\"\n" \
1.207 + ".endif \n\t" \
1.208 + \
1.209 + "li 11,"#n" \n\t" \
1.210 + "b SharedStub@local \n" \
1.211 +);
1.212 +
1.213 +#define SENTINEL_ENTRY(n) \
1.214 +nsresult nsXPTCStubBase::Sentinel##n() \
1.215 +{ \
1.216 + NS_ERROR("nsXPTCStubBase::Sentinel called"); \
1.217 + return NS_ERROR_NOT_IMPLEMENTED; \
1.218 +}
1.219 +
1.220 +#include "xptcstubsdef.inc"
