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comparison: xpcom/reflect/xptcall/src/md/unix/xptcstubs_x86_64_solaris.cpp
xpcom/reflect/xptcall/src/md/unix/xptcstubs_x86_64_solaris.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:f88fdfe2f42d |
|---|---|
| 1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 // Implement shared vtbl methods. | |
| 8 | |
| 9 // Keep this in sync with the darwin version. | |
| 10 | |
| 11 #include "xptcprivate.h" | |
| 12 #include "xptiprivate.h" | |
| 13 | |
| 14 // The Linux/x86-64 ABI passes the first 6 integer parameters and the | |
| 15 // first 8 floating point parameters in registers (rdi, rsi, rdx, rcx, | |
| 16 // r8, r9 and xmm0-xmm7), no stack space is allocated for these by the | |
| 17 // caller. The rest of the parameters are passed in the callers stack | |
| 18 // area. | |
| 19 | |
| 20 const uint32_t PARAM_BUFFER_COUNT = 16; | |
| 21 const uint32_t GPR_COUNT = 6; | |
| 22 const uint32_t FPR_COUNT = 8; | |
| 23 | |
| 24 // PrepareAndDispatch() is called by SharedStub() and calls the actual method. | |
| 25 // | |
| 26 // - 'args[]' contains the arguments passed on stack | |
| 27 // - 'gpregs[]' contains the arguments passed in integer registers | |
| 28 // - 'fpregs[]' contains the arguments passed in floating point registers | |
| 29 // | |
| 30 // The parameters are mapped into an array of type 'nsXPTCMiniVariant' | |
| 31 // and then the method gets called. | |
| 32 | |
| 33 extern "C" nsresult ATTRIBUTE_USED | |
| 34 PrepareAndDispatch(nsXPTCStubBase * self, uint32_t methodIndex, | |
| 35 uint64_t * args, uint64_t * gpregs, double *fpregs) | |
| 36 { | |
| 37 nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT]; | |
| 38 nsXPTCMiniVariant* dispatchParams = nullptr; | |
| 39 const nsXPTMethodInfo* info; | |
| 40 uint32_t paramCount; | |
| 41 uint32_t i; | |
| 42 nsresult result = NS_ERROR_FAILURE; | |
| 43 | |
| 44 NS_ASSERTION(self,"no self"); | |
| 45 | |
| 46 self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info); | |
| 47 NS_ASSERTION(info,"no method info"); | |
| 48 if (!info) | |
| 49 return NS_ERROR_UNEXPECTED; | |
| 50 | |
| 51 paramCount = info->GetParamCount(); | |
| 52 | |
| 53 // setup variant array pointer | |
| 54 if (paramCount > PARAM_BUFFER_COUNT) | |
| 55 dispatchParams = new nsXPTCMiniVariant[paramCount]; | |
| 56 else | |
| 57 dispatchParams = paramBuffer; | |
| 58 | |
| 59 NS_ASSERTION(dispatchParams,"no place for params"); | |
| 60 if (!dispatchParams) | |
| 61 return NS_ERROR_OUT_OF_MEMORY; | |
| 62 | |
| 63 uint64_t* ap = args; | |
| 64 uint32_t nr_gpr = 1; // skip one GPR register for 'that' | |
| 65 uint32_t nr_fpr = 0; | |
| 66 uint64_t value; | |
| 67 | |
| 68 for (i = 0; i < paramCount; i++) { | |
| 69 const nsXPTParamInfo& param = info->GetParam(i); | |
| 70 const nsXPTType& type = param.GetType(); | |
| 71 nsXPTCMiniVariant* dp = &dispatchParams[i]; | |
| 72 | |
| 73 if (!param.IsOut() && type == nsXPTType::T_DOUBLE) { | |
| 74 if (nr_fpr < FPR_COUNT) | |
| 75 dp->val.d = fpregs[nr_fpr++]; | |
| 76 else | |
| 77 dp->val.d = *(double*) ap++; | |
| 78 continue; | |
| 79 } | |
| 80 else if (!param.IsOut() && type == nsXPTType::T_FLOAT) { | |
| 81 if (nr_fpr < FPR_COUNT) | |
| 82 // The value in %xmm register is already prepared to | |
| 83 // be retrieved as a float. Therefore, we pass the | |
| 84 // value verbatim, as a double without conversion. | |
| 85 dp->val.d = fpregs[nr_fpr++]; | |
| 86 else | |
| 87 dp->val.f = *(float*) ap++; | |
| 88 continue; | |
| 89 } | |
| 90 else { | |
| 91 if (nr_gpr < GPR_COUNT) | |
| 92 value = gpregs[nr_gpr++]; | |
| 93 else | |
| 94 value = *ap++; | |
| 95 } | |
| 96 | |
| 97 if (param.IsOut() || !type.IsArithmetic()) { | |
| 98 dp->val.p = (void*) value; | |
| 99 continue; | |
| 100 } | |
| 101 | |
| 102 switch (type) { | |
| 103 case nsXPTType::T_I8: dp->val.i8 = (int8_t) value; break; | |
| 104 case nsXPTType::T_I16: dp->val.i16 = (int16_t) value; break; | |
| 105 case nsXPTType::T_I32: dp->val.i32 = (int32_t) value; break; | |
| 106 case nsXPTType::T_I64: dp->val.i64 = (int64_t) value; break; | |
| 107 case nsXPTType::T_U8: dp->val.u8 = (uint8_t) value; break; | |
| 108 case nsXPTType::T_U16: dp->val.u16 = (uint16_t) value; break; | |
| 109 case nsXPTType::T_U32: dp->val.u32 = (uint32_t) value; break; | |
| 110 case nsXPTType::T_U64: dp->val.u64 = (uint64_t) value; break; | |
| 111 // Cast to uint8_t first, to remove garbage on upper 56 bits. | |
| 112 case nsXPTType::T_BOOL: dp->val.b = (bool)(uint8_t) value; break; | |
| 113 case nsXPTType::T_CHAR: dp->val.c = (char) value; break; | |
| 114 case nsXPTType::T_WCHAR: dp->val.wc = (wchar_t) value; break; | |
| 115 | |
| 116 default: | |
| 117 NS_ERROR("bad type"); | |
| 118 break; | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 result = self->mOuter->CallMethod((uint16_t) methodIndex, info, dispatchParams); | |
| 123 | |
| 124 if (dispatchParams != paramBuffer) | |
| 125 delete [] dispatchParams; | |
| 126 | |
| 127 return result; | |
| 128 } | |
| 129 | |
| 130 #define STUB_ENTRY(n) | |
| 131 | |
| 132 #define SENTINEL_ENTRY(n) \ | |
| 133 nsresult nsXPTCStubBase::Sentinel##n() \ | |
| 134 { \ | |
| 135 NS_ERROR("nsXPTCStubBase::Sentinel called"); \ | |
| 136 return NS_ERROR_NOT_IMPLEMENTED; \ | |
| 137 } | |
| 138 | |
| 139 #include "xptcstubsdef.inc" |
