The Tor Browser / file comparison
comparison: xpcom/reflect/xptcall/src/md/unix/xptcinvoke_ppc64_linux.cpp
xpcom/reflect/xptcall/src/md/unix/xptcinvoke_ppc64_linux.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:80114bd0ebf3 |
|---|---|
| 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 // independent 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 the native ABI. | |
| 13 | |
| 14 // The PowerPC64 platform ABI can be found here: | |
| 15 // http://www.freestandards.org/spec/ELF/ppc64/ | |
| 16 // and in particular: | |
| 17 // http://www.freestandards.org/spec/ELF/ppc64/PPC-elf64abi-1.9.html#FUNC-CALL | |
| 18 | |
| 19 #include <stdio.h> | |
| 20 #include "xptcprivate.h" | |
| 21 | |
| 22 // 8 integral parameters are passed in registers, not including 'that' | |
| 23 #define GPR_COUNT 7 | |
| 24 | |
| 25 // 8 floating point parameters are passed in registers, floats are | |
| 26 // promoted to doubles when passed in registers | |
| 27 #define FPR_COUNT 13 | |
| 28 | |
| 29 extern "C" uint32_t | |
| 30 invoke_count_words(uint32_t paramCount, nsXPTCVariant* s) | |
| 31 { | |
| 32 return uint32_t(((paramCount * 2) + 3) & ~3); | |
| 33 } | |
| 34 | |
| 35 extern "C" void | |
| 36 invoke_copy_to_stack(uint64_t* gpregs, | |
| 37 double* fpregs, | |
| 38 uint32_t paramCount, | |
| 39 nsXPTCVariant* s, | |
| 40 uint64_t* d) | |
| 41 { | |
| 42 uint64_t tempu64; | |
| 43 | |
| 44 for(uint32_t i = 0; i < paramCount; i++, s++) { | |
| 45 if(s->IsPtrData()) | |
| 46 tempu64 = (uint64_t) s->ptr; | |
| 47 else { | |
| 48 switch(s->type) { | |
| 49 case nsXPTType::T_FLOAT: break; | |
| 50 case nsXPTType::T_DOUBLE: break; | |
| 51 case nsXPTType::T_I8: tempu64 = s->val.i8; break; | |
| 52 case nsXPTType::T_I16: tempu64 = s->val.i16; break; | |
| 53 case nsXPTType::T_I32: tempu64 = s->val.i32; break; | |
| 54 case nsXPTType::T_I64: tempu64 = s->val.i64; break; | |
| 55 case nsXPTType::T_U8: tempu64 = s->val.u8; break; | |
| 56 case nsXPTType::T_U16: tempu64 = s->val.u16; break; | |
| 57 case nsXPTType::T_U32: tempu64 = s->val.u32; break; | |
| 58 case nsXPTType::T_U64: tempu64 = s->val.u64; break; | |
| 59 case nsXPTType::T_BOOL: tempu64 = s->val.b; break; | |
| 60 case nsXPTType::T_CHAR: tempu64 = s->val.c; break; | |
| 61 case nsXPTType::T_WCHAR: tempu64 = s->val.wc; break; | |
| 62 default: tempu64 = (uint64_t) s->val.p; break; | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 if (!s->IsPtrData() && s->type == nsXPTType::T_DOUBLE) { | |
| 67 if (i < FPR_COUNT) | |
| 68 fpregs[i] = s->val.d; | |
| 69 else | |
| 70 *(double *)d = s->val.d; | |
| 71 } | |
| 72 else if (!s->IsPtrData() && s->type == nsXPTType::T_FLOAT) { | |
| 73 if (i < FPR_COUNT) { | |
| 74 fpregs[i] = s->val.f; // if passed in registers, floats are promoted to doubles | |
| 75 } else { | |
| 76 float *p = (float *)d; | |
| 77 #ifndef __LITTLE_ENDIAN__ | |
| 78 p++; | |
| 79 #endif | |
| 80 *p = s->val.f; | |
| 81 } | |
| 82 } | |
| 83 else { | |
| 84 if (i < GPR_COUNT) | |
| 85 gpregs[i] = tempu64; | |
| 86 else | |
| 87 *d = tempu64; | |
| 88 } | |
| 89 if (i >= 7) | |
| 90 d++; | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 EXPORT_XPCOM_API(nsresult) | |
| 95 NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex, | |
| 96 uint32_t paramCount, nsXPTCVariant* params); | |
| 97 |
