The Tor Browser / file comparison
comparison: xpcom/reflect/xptcall/src/md/unix/xptcinvoke_ppc_openbsd.cpp
xpcom/reflect/xptcall/src/md/unix/xptcinvoke_ppc_openbsd.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:311a678fc12a |
|---|---|
| 1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 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 // Platform specific code to invoke XPCOM methods on native objects | |
| 7 | |
| 8 // The purpose of NS_InvokeByIndex() is to map a platform | |
| 9 // indepenpent call to the platform ABI. To do that, | |
| 10 // NS_InvokeByIndex() has to determine the method to call via vtable | |
| 11 // access. The parameters for the method are read from the | |
| 12 // nsXPTCVariant* and prepared for th native ABI. For the Linux/PPC | |
| 13 // ABI this means that the first 8 integral and floating point | |
| 14 // parameters are passed in registers. | |
| 15 | |
| 16 #include "xptcprivate.h" | |
| 17 | |
| 18 // 8 integral parameters are passed in registers | |
| 19 #define GPR_COUNT 8 | |
| 20 | |
| 21 // 8 floating point parameters are passed in registers, floats are | |
| 22 // promoted to doubles when passed in registers | |
| 23 #define FPR_COUNT 8 | |
| 24 | |
| 25 extern "C" uint32_t | |
| 26 invoke_count_words(uint32_t paramCount, nsXPTCVariant* s) | |
| 27 { | |
| 28 return uint32_t(((paramCount * 2) + 3) & ~3); | |
| 29 } | |
| 30 | |
| 31 extern "C" void | |
| 32 invoke_copy_to_stack(uint32_t* d, | |
| 33 uint32_t paramCount, | |
| 34 nsXPTCVariant* s, | |
| 35 uint32_t* gpregs, | |
| 36 double* fpregs) | |
| 37 { | |
| 38 uint32_t gpr = 1; // skip one GP reg for 'that' | |
| 39 uint32_t fpr = 0; | |
| 40 uint32_t tempu32; | |
| 41 uint64_t tempu64; | |
| 42 | |
| 43 for(uint32_t i = 0; i < paramCount; i++, s++) { | |
| 44 if(s->IsPtrData()) { | |
| 45 if(s->type == nsXPTType::T_JSVAL) | |
| 46 tempu32 = (uint32_t) &(s->ptr); | |
| 47 else | |
| 48 tempu32 = (uint32_t) s->ptr; | |
| 49 } else { | |
| 50 switch(s->type) { | |
| 51 case nsXPTType::T_FLOAT: break; | |
| 52 case nsXPTType::T_DOUBLE: break; | |
| 53 case nsXPTType::T_I8: tempu32 = s->val.i8; break; | |
| 54 case nsXPTType::T_I16: tempu32 = s->val.i16; break; | |
| 55 case nsXPTType::T_I32: tempu32 = s->val.i32; break; | |
| 56 case nsXPTType::T_I64: tempu64 = s->val.i64; break; | |
| 57 case nsXPTType::T_U8: tempu32 = s->val.u8; break; | |
| 58 case nsXPTType::T_U16: tempu32 = s->val.u16; break; | |
| 59 case nsXPTType::T_U32: tempu32 = s->val.u32; break; | |
| 60 case nsXPTType::T_U64: tempu64 = s->val.u64; break; | |
| 61 case nsXPTType::T_BOOL: tempu32 = s->val.b; break; | |
| 62 case nsXPTType::T_CHAR: tempu32 = s->val.c; break; | |
| 63 case nsXPTType::T_WCHAR: tempu32 = s->val.wc; break; | |
| 64 default: tempu32 = (uint32_t) s->val.p; break; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 if (!s->IsPtrData() && s->type == nsXPTType::T_DOUBLE) { | |
| 69 if (fpr < FPR_COUNT) | |
| 70 fpregs[fpr++] = s->val.d; | |
| 71 else { | |
| 72 if ((uint32_t) d & 4) d++; // doubles are 8-byte aligned on stack | |
| 73 *((double*) d) = s->val.d; | |
| 74 d += 2; | |
| 75 } | |
| 76 } | |
| 77 else if (!s->IsPtrData() && s->type == nsXPTType::T_FLOAT) { | |
| 78 if (fpr < FPR_COUNT) | |
| 79 fpregs[fpr++] = s->val.f; // if passed in registers, floats are promoted to doubles | |
| 80 else | |
| 81 *((float*) d++) = s->val.f; | |
| 82 } | |
| 83 else if (!s->IsPtrData() && (s->type == nsXPTType::T_I64 | |
| 84 || s->type == nsXPTType::T_U64)) { | |
| 85 if ((gpr + 1) < GPR_COUNT) { | |
| 86 if (gpr & 1) gpr++; // longlongs are aligned in odd/even register pairs, eg. r5/r6 | |
| 87 *((uint64_t*) &gpregs[gpr]) = tempu64; | |
| 88 gpr += 2; | |
| 89 } | |
| 90 else { | |
| 91 if ((uint32_t) d & 4) d++; // longlongs are 8-byte aligned on stack | |
| 92 *((uint64_t*) d) = tempu64; | |
| 93 d += 2; | |
| 94 } | |
| 95 } | |
| 96 else { | |
| 97 if (gpr < GPR_COUNT) | |
| 98 gpregs[gpr++] = tempu32; | |
| 99 else | |
| 100 *d++ = tempu32; | |
| 101 } | |
| 102 | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 extern "C" | |
| 107 EXPORT_XPCOM_API(nsresult) | |
| 108 NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex, | |
| 109 uint32_t paramCount, nsXPTCVariant* params); |
