1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/xpcom/reflect/xptcall/src/md/unix/xptcstubs_ppc64_linux.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,246 @@
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/PPC64 ABI passes the first 8 integral
1.15 +// parameters and the first 13 floating point parameters in registers
1.16 +// (r3-r10 and f1-f13), no stack space is allocated for these by the
1.17 +// caller. The rest of the parameters are passed in the caller's stack
1.18 +// area. The stack pointer has to retain 16-byte alignment.
1.19 +
1.20 +// The PowerPC64 platform ABI can be found here:
1.21 +// http://www.freestandards.org/spec/ELF/ppc64/
1.22 +// and in particular:
1.23 +// http://www.freestandards.org/spec/ELF/ppc64/PPC-elf64abi-1.9.html#FUNC-CALL
1.24 +
1.25 +#define PARAM_BUFFER_COUNT 16
1.26 +#define GPR_COUNT 7
1.27 +#define FPR_COUNT 13
1.28 +
1.29 +// PrepareAndDispatch() is called by SharedStub() and calls the actual method.
1.30 +//
1.31 +// - 'args[]' contains the arguments passed on stack
1.32 +// - 'gprData[]' contains the arguments passed in integer registers
1.33 +// - 'fprData[]' contains the arguments passed in floating point registers
1.34 +//
1.35 +// The parameters are mapped into an array of type 'nsXPTCMiniVariant'
1.36 +// and then the method gets called.
1.37 +#include <stdio.h>
1.38 +extern "C" nsresult ATTRIBUTE_USED
1.39 +PrepareAndDispatch(nsXPTCStubBase* self,
1.40 + uint64_t methodIndex,
1.41 + uint64_t* args,
1.42 + uint64_t *gprData,
1.43 + double *fprData)
1.44 +{
1.45 + nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
1.46 + nsXPTCMiniVariant* dispatchParams = nullptr;
1.47 + const nsXPTMethodInfo* info;
1.48 + uint32_t paramCount;
1.49 + uint32_t i;
1.50 + nsresult result = NS_ERROR_FAILURE;
1.51 +
1.52 + NS_ASSERTION(self,"no self");
1.53 +
1.54 + self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
1.55 + NS_ASSERTION(info,"no method info");
1.56 + if (! info)
1.57 + return NS_ERROR_UNEXPECTED;
1.58 +
1.59 + paramCount = info->GetParamCount();
1.60 +
1.61 + // setup variant array pointer
1.62 + if(paramCount > PARAM_BUFFER_COUNT)
1.63 + dispatchParams = new nsXPTCMiniVariant[paramCount];
1.64 + else
1.65 + dispatchParams = paramBuffer;
1.66 +
1.67 + NS_ASSERTION(dispatchParams,"no place for params");
1.68 + if (! dispatchParams)
1.69 + return NS_ERROR_OUT_OF_MEMORY;
1.70 +
1.71 + uint64_t* ap = args;
1.72 + uint64_t tempu64;
1.73 +
1.74 + for(i = 0; i < paramCount; i++) {
1.75 + const nsXPTParamInfo& param = info->GetParam(i);
1.76 + const nsXPTType& type = param.GetType();
1.77 + nsXPTCMiniVariant* dp = &dispatchParams[i];
1.78 +
1.79 + if (!param.IsOut() && type == nsXPTType::T_DOUBLE) {
1.80 + if (i < FPR_COUNT)
1.81 + dp->val.d = fprData[i];
1.82 + else
1.83 + dp->val.d = *(double*) ap;
1.84 + } else if (!param.IsOut() && type == nsXPTType::T_FLOAT) {
1.85 + if (i < FPR_COUNT)
1.86 + dp->val.f = (float) fprData[i]; // in registers floats are passed as doubles
1.87 + else {
1.88 + float *p = (float *)ap;
1.89 +#ifndef __LITTLE_ENDIAN__
1.90 + p++;
1.91 +#endif
1.92 + dp->val.f = *p;
1.93 + }
1.94 + } else { /* integer type or pointer */
1.95 + if (i < GPR_COUNT)
1.96 + tempu64 = gprData[i];
1.97 + else
1.98 + tempu64 = *ap;
1.99 +
1.100 + if (param.IsOut() || !type.IsArithmetic())
1.101 + dp->val.p = (void*) tempu64;
1.102 + else if (type == nsXPTType::T_I8)
1.103 + dp->val.i8 = (int8_t) tempu64;
1.104 + else if (type == nsXPTType::T_I16)
1.105 + dp->val.i16 = (int16_t) tempu64;
1.106 + else if (type == nsXPTType::T_I32)
1.107 + dp->val.i32 = (int32_t) tempu64;
1.108 + else if (type == nsXPTType::T_I64)
1.109 + dp->val.i64 = (int64_t) tempu64;
1.110 + else if (type == nsXPTType::T_U8)
1.111 + dp->val.u8 = (uint8_t) tempu64;
1.112 + else if (type == nsXPTType::T_U16)
1.113 + dp->val.u16 = (uint16_t) tempu64;
1.114 + else if (type == nsXPTType::T_U32)
1.115 + dp->val.u32 = (uint32_t) tempu64;
1.116 + else if (type == nsXPTType::T_U64)
1.117 + dp->val.u64 = (uint64_t) tempu64;
1.118 + else if (type == nsXPTType::T_BOOL)
1.119 + dp->val.b = (bool) tempu64;
1.120 + else if (type == nsXPTType::T_CHAR)
1.121 + dp->val.c = (char) tempu64;
1.122 + else if (type == nsXPTType::T_WCHAR)
1.123 + dp->val.wc = (wchar_t) tempu64;
1.124 + else
1.125 + NS_ERROR("bad type");
1.126 + }
1.127 +
1.128 + if (i >= 7)
1.129 + ap++;
1.130 + }
1.131 +
1.132 + result = self->mOuter->CallMethod((uint16_t) methodIndex, info,
1.133 + dispatchParams);
1.134 +
1.135 + if (dispatchParams != paramBuffer)
1.136 + delete [] dispatchParams;
1.137 +
1.138 + return result;
1.139 +}
1.140 +
1.141 +// Load r11 with the constant 'n' and branch to SharedStub().
1.142 +//
1.143 +// XXX Yes, it's ugly that we're relying on gcc's name-mangling here;
1.144 +// however, it's quick, dirty, and'll break when the ABI changes on
1.145 +// us, which is what we want ;-).
1.146 +
1.147 +
1.148 +// gcc-3 version
1.149 +//
1.150 +// As G++3 ABI contains the length of the functionname in the mangled
1.151 +// name, it is difficult to get a generic assembler mechanism like
1.152 +// in the G++ 2.95 case.
1.153 +// Create names would be like:
1.154 +// _ZN14nsXPTCStubBase5Stub1Ev
1.155 +// _ZN14nsXPTCStubBase6Stub12Ev
1.156 +// _ZN14nsXPTCStubBase7Stub123Ev
1.157 +// _ZN14nsXPTCStubBase8Stub1234Ev
1.158 +// etc.
1.159 +// Use assembler directives to get the names right...
1.160 +
1.161 +#if _CALL_ELF == 2
1.162 +# define STUB_ENTRY(n) \
1.163 +__asm__ ( \
1.164 + ".section \".text\" \n\t" \
1.165 + ".align 2 \n\t" \
1.166 + ".if "#n" < 10 \n\t" \
1.167 + ".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
1.168 + ".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \
1.169 +"_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
1.170 + "0: addis 2,12,.TOC.-0b@ha \n\t" \
1.171 + "addi 2,2,.TOC.-0b@l \n\t" \
1.172 + ".localentry _ZN14nsXPTCStubBase5Stub"#n"Ev,.-_ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
1.173 + \
1.174 + ".elseif "#n" < 100 \n\t" \
1.175 + ".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
1.176 + ".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \
1.177 +"_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
1.178 + "0: addis 2,12,.TOC.-0b@ha \n\t" \
1.179 + "addi 2,2,.TOC.-0b@l \n\t" \
1.180 + ".localentry _ZN14nsXPTCStubBase6Stub"#n"Ev,.-_ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
1.181 + \
1.182 + ".elseif "#n" < 1000 \n\t" \
1.183 + ".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
1.184 + ".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \
1.185 +"_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
1.186 + "0: addis 2,12,.TOC.-0b@ha \n\t" \
1.187 + "addi 2,2,.TOC.-0b@l \n\t" \
1.188 + ".localentry _ZN14nsXPTCStubBase7Stub"#n"Ev,.-_ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
1.189 + \
1.190 + ".else \n\t" \
1.191 + ".err \"stub number "#n" >= 1000 not yet supported\"\n" \
1.192 + ".endif \n\t" \
1.193 + \
1.194 + "li 11,"#n" \n\t" \
1.195 + "b SharedStub \n" \
1.196 +);
1.197 +#else
1.198 +# define STUB_ENTRY(n) \
1.199 +__asm__ ( \
1.200 + ".section \".toc\",\"aw\" \n\t" \
1.201 + ".section \".text\" \n\t" \
1.202 + ".align 2 \n\t" \
1.203 + ".if "#n" < 10 \n\t" \
1.204 + ".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
1.205 + ".section \".opd\",\"aw\" \n\t" \
1.206 + ".align 3 \n\t" \
1.207 +"_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
1.208 + ".quad ._ZN14nsXPTCStubBase5Stub"#n"Ev,.TOC.@tocbase \n\t" \
1.209 + ".previous \n\t" \
1.210 + ".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \
1.211 +"._ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
1.212 + \
1.213 + ".elseif "#n" < 100 \n\t" \
1.214 + ".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
1.215 + ".section \".opd\",\"aw\" \n\t" \
1.216 + ".align 3 \n\t" \
1.217 +"_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
1.218 + ".quad ._ZN14nsXPTCStubBase6Stub"#n"Ev,.TOC.@tocbase \n\t" \
1.219 + ".previous \n\t" \
1.220 + ".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \
1.221 +"._ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
1.222 + \
1.223 + ".elseif "#n" < 1000 \n\t" \
1.224 + ".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
1.225 + ".section \".opd\",\"aw\" \n\t" \
1.226 + ".align 3 \n\t" \
1.227 +"_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
1.228 + ".quad ._ZN14nsXPTCStubBase7Stub"#n"Ev,.TOC.@tocbase \n\t" \
1.229 + ".previous \n\t" \
1.230 + ".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \
1.231 +"._ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
1.232 + \
1.233 + ".else \n\t" \
1.234 + ".err \"stub number "#n" >= 1000 not yet supported\"\n" \
1.235 + ".endif \n\t" \
1.236 + \
1.237 + "li 11,"#n" \n\t" \
1.238 + "b SharedStub \n" \
1.239 +);
1.240 +#endif
1.241 +
1.242 +#define SENTINEL_ENTRY(n) \
1.243 +nsresult nsXPTCStubBase::Sentinel##n() \
1.244 +{ \
1.245 + NS_ERROR("nsXPTCStubBase::Sentinel called"); \
1.246 + return NS_ERROR_NOT_IMPLEMENTED; \
1.247 +}
1.248 +
1.249 +#include "xptcstubsdef.inc"
