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comparison: xpcom/reflect/xptcall/src/md/unix/xptcstubs_ppc_rhapsody.cpp
xpcom/reflect/xptcall/src/md/unix/xptcstubs_ppc_rhapsody.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:dab1835b4ef0 |
|---|---|
| 1 /* -*- Mode: C -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "xptcprivate.h" | |
| 7 #include "xptiprivate.h" | |
| 8 | |
| 9 /* Under the Mac OS X PowerPC ABI, the first 8 integer and 13 floating point | |
| 10 * parameters are delivered in registers and are not on the stack, although | |
| 11 * stack space is allocated for them. The integer parameters are delivered | |
| 12 * in GPRs r3 through r10. The first 8 words of the parameter area on the | |
| 13 * stack shadow these registers. A word will either be in a register or on | |
| 14 * the stack, but not in both. Although the first floating point parameters | |
| 15 * are passed in floating point registers, GPR space and stack space is | |
| 16 * reserved for them as well. | |
| 17 * | |
| 18 * SharedStub has passed pointers to the parameter section of the stack | |
| 19 * and saved copies of the GPRs and FPRs used for parameter passing. We | |
| 20 * don't care about the first parameter (which is delivered here as the self | |
| 21 * pointer), so SharedStub pointed us past that. argsGPR thus points to GPR | |
| 22 * r4 (corresponding to the first argument after the self pointer) and | |
| 23 * argsStack points to the parameter section of the caller's stack frame | |
| 24 * reserved for the same argument. This way, it is possible to reference | |
| 25 * either argsGPR or argsStack with the same index. | |
| 26 * | |
| 27 * Contrary to the assumption made by the previous implementation, the | |
| 28 * Mac OS X PowerPC ABI doesn't impose any special alignment restrictions on | |
| 29 * parameter sections of stacks. Values that are 64 bits wide appear on the | |
| 30 * stack without any special padding. | |
| 31 * | |
| 32 * See also xptcstubs_asm_ppc_darwin.s.m4:_SharedStub. | |
| 33 * | |
| 34 * ABI reference: | |
| 35 * http://developer.apple.com/documentation/DeveloperTools/Conceptual/ | |
| 36 * MachORuntime/PowerPCConventions/chapter_3_section_1.html */ | |
| 37 | |
| 38 extern "C" nsresult ATTRIBUTE_USED | |
| 39 PrepareAndDispatch( | |
| 40 nsXPTCStubBase *self, | |
| 41 uint32_t methodIndex, | |
| 42 uint32_t *argsStack, | |
| 43 uint32_t *argsGPR, | |
| 44 double *argsFPR) { | |
| 45 #define PARAM_BUFFER_COUNT 16 | |
| 46 #define PARAM_FPR_COUNT 13 | |
| 47 #define PARAM_GPR_COUNT 7 | |
| 48 | |
| 49 nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT]; | |
| 50 nsXPTCMiniVariant *dispatchParams = nullptr; | |
| 51 const nsXPTMethodInfo *methodInfo; | |
| 52 uint8_t paramCount; | |
| 53 uint8_t i; | |
| 54 nsresult result = NS_ERROR_FAILURE; | |
| 55 uint32_t argIndex = 0; | |
| 56 uint32_t fprIndex = 0; | |
| 57 | |
| 58 typedef struct { | |
| 59 uint32_t hi; | |
| 60 uint32_t lo; | |
| 61 } DU; | |
| 62 | |
| 63 NS_ASSERTION(self, "no self"); | |
| 64 | |
| 65 self->mEntry->GetMethodInfo(uint16_t(methodIndex), &methodInfo); | |
| 66 NS_ASSERTION(methodInfo, "no method info"); | |
| 67 | |
| 68 paramCount = methodInfo->GetParamCount(); | |
| 69 | |
| 70 if(paramCount > PARAM_BUFFER_COUNT) { | |
| 71 dispatchParams = new nsXPTCMiniVariant[paramCount]; | |
| 72 } | |
| 73 else { | |
| 74 dispatchParams = paramBuffer; | |
| 75 } | |
| 76 NS_ASSERTION(dispatchParams,"no place for params"); | |
| 77 | |
| 78 for(i = 0; i < paramCount; i++, argIndex++) { | |
| 79 const nsXPTParamInfo ¶m = methodInfo->GetParam(i); | |
| 80 const nsXPTType &type = param.GetType(); | |
| 81 nsXPTCMiniVariant *dp = &dispatchParams[i]; | |
| 82 uint32_t theParam; | |
| 83 | |
| 84 if(argIndex < PARAM_GPR_COUNT) | |
| 85 theParam = argsGPR[argIndex]; | |
| 86 else | |
| 87 theParam = argsStack[argIndex]; | |
| 88 | |
| 89 if(param.IsOut() || !type.IsArithmetic()) | |
| 90 dp->val.p = (void *) theParam; | |
| 91 else { | |
| 92 switch(type) { | |
| 93 case nsXPTType::T_I8: | |
| 94 dp->val.i8 = (int8_t) theParam; | |
| 95 break; | |
| 96 case nsXPTType::T_I16: | |
| 97 dp->val.i16 = (int16_t) theParam; | |
| 98 break; | |
| 99 case nsXPTType::T_I32: | |
| 100 dp->val.i32 = (int32_t) theParam; | |
| 101 break; | |
| 102 case nsXPTType::T_U8: | |
| 103 dp->val.u8 = (uint8_t) theParam; | |
| 104 break; | |
| 105 case nsXPTType::T_U16: | |
| 106 dp->val.u16 = (uint16_t) theParam; | |
| 107 break; | |
| 108 case nsXPTType::T_U32: | |
| 109 dp->val.u32 = (uint32_t) theParam; | |
| 110 break; | |
| 111 case nsXPTType::T_I64: | |
| 112 case nsXPTType::T_U64: | |
| 113 ((DU *)dp)->hi = (uint32_t) theParam; | |
| 114 if(++argIndex < PARAM_GPR_COUNT) | |
| 115 ((DU *)dp)->lo = (uint32_t) argsGPR[argIndex]; | |
| 116 else | |
| 117 ((DU *)dp)->lo = (uint32_t) argsStack[argIndex]; | |
| 118 break; | |
| 119 case nsXPTType::T_BOOL: | |
| 120 dp->val.b = (bool) theParam; | |
| 121 break; | |
| 122 case nsXPTType::T_CHAR: | |
| 123 dp->val.c = (char) theParam; | |
| 124 break; | |
| 125 case nsXPTType::T_WCHAR: | |
| 126 dp->val.wc = (wchar_t) theParam; | |
| 127 break; | |
| 128 case nsXPTType::T_FLOAT: | |
| 129 if(fprIndex < PARAM_FPR_COUNT) | |
| 130 dp->val.f = (float) argsFPR[fprIndex++]; | |
| 131 else | |
| 132 dp->val.f = *(float *) &argsStack[argIndex]; | |
| 133 break; | |
| 134 case nsXPTType::T_DOUBLE: | |
| 135 if(fprIndex < PARAM_FPR_COUNT) | |
| 136 dp->val.d = argsFPR[fprIndex++]; | |
| 137 else | |
| 138 dp->val.d = *(double *) &argsStack[argIndex]; | |
| 139 argIndex++; | |
| 140 break; | |
| 141 default: | |
| 142 NS_ERROR("bad type"); | |
| 143 break; | |
| 144 } | |
| 145 } | |
| 146 } | |
| 147 | |
| 148 result = self->mOuter-> | |
| 149 CallMethod((uint16_t)methodIndex, methodInfo, dispatchParams); | |
| 150 | |
| 151 if(dispatchParams != paramBuffer) | |
| 152 delete [] dispatchParams; | |
| 153 | |
| 154 return result; | |
| 155 } | |
| 156 | |
| 157 #define STUB_ENTRY(n) | |
| 158 #define SENTINEL_ENTRY(n) \ | |
| 159 nsresult nsXPTCStubBase::Sentinel##n() \ | |
| 160 { \ | |
| 161 NS_ERROR("nsXPTCStubBase::Sentinel called"); \ | |
| 162 return NS_ERROR_NOT_IMPLEMENTED; \ | |
| 163 } | |
| 164 | |
| 165 #include "xptcstubsdef.inc" |
