1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <cassert>
#include <cstdarg>
#include <cstddef>
#include <cstdlib>
#include <cstring>
#include <dlfcn.h>
#include <com/sun/star/uno/XInterface.hpp>
#include <com/sun/star/uno/genfunc.hxx>
#include <sal/alloca.h>
#include <sal/types.h>
#include <typelib/typeclass.h>
#include <typelib/typedescription.h>
#include <typelib/typedescription.hxx>
#include <bridge.hxx>
#include <cppinterfaceproxy.hxx>
#include <types.hxx>
#include <vtablefactory.hxx>
#include "abi.hxx"
extern "C" void vtableSlotCall_();
namespace {
void call(
bridges::cpp_uno::shared::CppInterfaceProxy * proxy,
css::uno::TypeDescription const & description,
typelib_TypeDescriptionReference * returnType, sal_Int32 count,
typelib_MethodParameter * parameters, unsigned long * gpr,
unsigned long * fpr, unsigned long * stack, void * indirectRet)
{
typelib_TypeDescription * rtd = 0;
if (returnType != 0) {
TYPELIB_DANGER_GET(&rtd, returnType);
}
abi_aarch64::ReturnKind retKind = rtd == 0
? abi_aarch64::RETURN_KIND_REG : abi_aarch64::getReturnKind(rtd);
bool retConv = rtd != 0
&& bridges::cpp_uno::shared::relatesToInterfaceType(rtd);
void * retin = retKind == abi_aarch64::RETURN_KIND_INDIRECT && !retConv
? indirectRet : rtd == 0 ? 0 : alloca(rtd->nSize);<--- Obsolete function 'alloca' called. [+]The obsolete function 'alloca' is called. In C++11 and later it is recommended to use std::array<> or a dynamically allocated array instead. The function 'alloca' is dangerous for many reasons (http://stackoverflow.com/questions/1018853/why-is-alloca-not-considered-good-practice and http://linux.die.net/man/3/alloca).
void ** args = static_cast< void ** >(alloca(count * sizeof (void *)));<--- Obsolete function 'alloca' called. [+]The obsolete function 'alloca' is called. In C++11 and later it is recommended to use std::array<> or a dynamically allocated array instead. The function 'alloca' is dangerous for many reasons (http://stackoverflow.com/questions/1018853/why-is-alloca-not-considered-good-practice and http://linux.die.net/man/3/alloca).
void ** cppArgs = static_cast< void ** >(alloca(count * sizeof (void *)));<--- Obsolete function 'alloca' called. [+]The obsolete function 'alloca' is called. In C++11 and later it is recommended to use std::array<> or a dynamically allocated array instead. The function 'alloca' is dangerous for many reasons (http://stackoverflow.com/questions/1018853/why-is-alloca-not-considered-good-practice and http://linux.die.net/man/3/alloca).
typelib_TypeDescription ** argtds = static_cast<typelib_TypeDescription **>(
alloca(count * sizeof (typelib_TypeDescription *)));<--- Obsolete function 'alloca' called. [+]The obsolete function 'alloca' is called. In C++11 and later it is recommended to use std::array<> or a dynamically allocated array instead. The function 'alloca' is dangerous for many reasons (http://stackoverflow.com/questions/1018853/why-is-alloca-not-considered-good-practice and http://linux.die.net/man/3/alloca).
sal_Int32 ngpr = 1;
sal_Int32 nfpr = 0;
sal_Int32 sp = 0;
for (sal_Int32 i = 0; i != count; ++i) {
if (!parameters[i].bOut
&& bridges::cpp_uno::shared::isSimpleType(parameters[i].pTypeRef))
{
switch (parameters[i].pTypeRef->eTypeClass) {
case typelib_TypeClass_BOOLEAN:
case typelib_TypeClass_BYTE:
case typelib_TypeClass_SHORT:
case typelib_TypeClass_UNSIGNED_SHORT:
case typelib_TypeClass_LONG:
case typelib_TypeClass_UNSIGNED_LONG:
case typelib_TypeClass_HYPER:
case typelib_TypeClass_UNSIGNED_HYPER:
case typelib_TypeClass_CHAR:
case typelib_TypeClass_ENUM:
args[i] = ngpr == 8 ? stack + sp++ : gpr + ngpr++;
break;
case typelib_TypeClass_FLOAT:
case typelib_TypeClass_DOUBLE:
args[i] = nfpr == 8 ? stack + sp++ : fpr + nfpr++;
break;
default:
assert(false);
}
argtds[i] = 0;
} else {
cppArgs[i] = reinterpret_cast<void *>(
ngpr == 8 ? stack[sp++] : gpr[ngpr++]);
typelib_TypeDescription * ptd = 0;
TYPELIB_DANGER_GET(&ptd, parameters[i].pTypeRef);
if (!parameters[i].bIn) {
args[i] = alloca(ptd->nSize);<--- Obsolete function 'alloca' called. [+]The obsolete function 'alloca' is called. In C++11 and later it is recommended to use std::array<> or a dynamically allocated array instead. The function 'alloca' is dangerous for many reasons (http://stackoverflow.com/questions/1018853/why-is-alloca-not-considered-good-practice and http://linux.die.net/man/3/alloca).
argtds[i] = ptd;
} else if (bridges::cpp_uno::shared::relatesToInterfaceType(ptd)) {
args[i] = alloca(ptd->nSize);<--- Obsolete function 'alloca' called. [+]The obsolete function 'alloca' is called. In C++11 and later it is recommended to use std::array<> or a dynamically allocated array instead. The function 'alloca' is dangerous for many reasons (http://stackoverflow.com/questions/1018853/why-is-alloca-not-considered-good-practice and http://linux.die.net/man/3/alloca).
uno_copyAndConvertData(
args[i], cppArgs[i], ptd, proxy->getBridge()->getCpp2Uno());
argtds[i] = ptd;
} else {
args[i] = cppArgs[i];
argtds[i] = 0;
TYPELIB_DANGER_RELEASE(ptd);
}
}
}
uno_Any exc;
uno_Any * pexc = &exc;
proxy->getUnoI()->pDispatcher(
proxy->getUnoI(), description.get(), retin, args, &pexc);
if (pexc != 0) {
for (sal_Int32 i = 0; i != count; ++i) {
if (argtds[i] != 0) {
if (parameters[i].bIn) {
uno_destructData(args[i], argtds[i], 0);
}
TYPELIB_DANGER_RELEASE(argtds[i]);
}
}
if (rtd != 0) {
TYPELIB_DANGER_RELEASE(rtd);
}
abi_aarch64::raiseException(&exc, proxy->getBridge()->getUno2Cpp());
}
for (sal_Int32 i = 0; i != count; ++i) {
if (argtds[i] != 0) {
if (parameters[i].bOut) {
uno_destructData(
cppArgs[i], argtds[i],
reinterpret_cast<uno_ReleaseFunc>(css::uno::cpp_release));
uno_copyAndConvertData(
cppArgs[i], args[i], argtds[i],
proxy->getBridge()->getUno2Cpp());
}
uno_destructData(args[i], argtds[i], 0);
TYPELIB_DANGER_RELEASE(argtds[i]);
}
}
void * retout = 0; // avoid false -Werror=maybe-uninitialized
switch (retKind) {
case abi_aarch64::RETURN_KIND_REG:
switch (rtd == 0 ? typelib_TypeClass_VOID : rtd->eTypeClass) {
case typelib_TypeClass_VOID:
break;
case typelib_TypeClass_BOOLEAN:
case typelib_TypeClass_BYTE:
case typelib_TypeClass_SHORT:
case typelib_TypeClass_UNSIGNED_SHORT:
case typelib_TypeClass_LONG:
case typelib_TypeClass_UNSIGNED_LONG:
case typelib_TypeClass_HYPER:
case typelib_TypeClass_UNSIGNED_HYPER:
case typelib_TypeClass_CHAR:
case typelib_TypeClass_ENUM:
std::memcpy(gpr, retin, rtd->nSize);
assert(!retConv);
break;
case typelib_TypeClass_FLOAT:
case typelib_TypeClass_DOUBLE:
std::memcpy(fpr, retin, rtd->nSize);
assert(!retConv);
break;
case typelib_TypeClass_STRUCT:
if (retConv) {
retout = gpr;
} else {
std::memcpy(gpr, retin, rtd->nSize);
}
break;
default:
assert(false);
}
break;
case abi_aarch64::RETURN_KIND_HFA_FLOAT:
assert(rtd != 0);
switch (rtd->nSize) {
case 16:
std::memcpy(fpr + 3, static_cast<char *>(retin) + 12, 4);
[[fallthrough]];
case 12:
std::memcpy(fpr + 2, static_cast<char *>(retin) + 8, 4);
[[fallthrough]];
case 8:
std::memcpy(fpr + 1, static_cast<char *>(retin) + 4, 4);
[[fallthrough]];
case 4:
std::memcpy(fpr, retin, 4);
break;
default:
assert(false);
}
assert(!retConv);
break;
case abi_aarch64::RETURN_KIND_HFA_DOUBLE:
assert(rtd != 0);
std::memcpy(fpr, retin, rtd->nSize);
assert(!retConv);
break;
case abi_aarch64::RETURN_KIND_INDIRECT:
retout = indirectRet;
break;
}
if (retConv) {
uno_copyAndConvertData(
retout, retin, rtd, proxy->getBridge()->getUno2Cpp());
uno_destructData(retin, rtd, 0);
}
if (rtd != 0) {
TYPELIB_DANGER_RELEASE(rtd);
}
}
extern "C" void vtableCall(
sal_Int32 functionIndex, sal_Int32 vtableOffset,
unsigned long * gpr, unsigned long * fpr, unsigned long * stack,
void * indirectRet)
{
bridges::cpp_uno::shared::CppInterfaceProxy * proxy
= bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy(
reinterpret_cast<char *>(gpr[0]) - vtableOffset);
typelib_InterfaceTypeDescription * type = proxy->getTypeDescr();
assert(functionIndex < type->nMapFunctionIndexToMemberIndex);
sal_Int32 pos = type->pMapFunctionIndexToMemberIndex[functionIndex];
css::uno::TypeDescription desc(type->ppAllMembers[pos]);
switch (desc.get()->eTypeClass) {
case typelib_TypeClass_INTERFACE_ATTRIBUTE:
if (type->pMapMemberIndexToFunctionIndex[pos] == functionIndex) {
// Getter:
call(
proxy, desc,
reinterpret_cast<typelib_InterfaceAttributeTypeDescription *>(
desc.get())->pAttributeTypeRef,
0, 0, gpr, fpr, stack, indirectRet);
} else {
// Setter:
typelib_MethodParameter param = {
0,
reinterpret_cast<typelib_InterfaceAttributeTypeDescription *>(
desc.get())->pAttributeTypeRef,
true, false };
call(proxy, desc, 0, 1, ¶m, gpr, fpr, stack, indirectRet);
}
break;
case typelib_TypeClass_INTERFACE_METHOD:
switch (functionIndex) {
case 1:
proxy->acquireProxy();
break;
case 2:
proxy->releaseProxy();
break;
case 0:
{
typelib_TypeDescription * td = 0;
TYPELIB_DANGER_GET(
&td,
(reinterpret_cast<css::uno::Type *>(gpr[1])
->getTypeLibType()));
if (td != 0 && td->eTypeClass == typelib_TypeClass_INTERFACE) {
css::uno::XInterface * ifc = 0;
proxy->getBridge()->getCppEnv()->getRegisteredInterface(
proxy->getBridge()->getCppEnv(),
reinterpret_cast<void **>(&ifc), proxy->getOid().pData,
reinterpret_cast<typelib_InterfaceTypeDescription *>(
td));
if (ifc != 0) {
uno_any_construct(
reinterpret_cast<uno_Any *>(indirectRet), &ifc, td,
reinterpret_cast<uno_AcquireFunc>(
css::uno::cpp_acquire));
ifc->release();
TYPELIB_DANGER_RELEASE(td);
break;
}
TYPELIB_DANGER_RELEASE(td);
}
}
[[fallthrough]];
default:
call(
proxy, desc,
reinterpret_cast<typelib_InterfaceMethodTypeDescription *>(
desc.get())->pReturnTypeRef,
reinterpret_cast<typelib_InterfaceMethodTypeDescription *>(
desc.get())->nParams,
reinterpret_cast<typelib_InterfaceMethodTypeDescription *>(
desc.get())->pParams,
gpr, fpr, stack, indirectRet);
}
break;
default:
assert(false);
}
}
struct aarch64_va_list {
void * stack;
void * gr_top;
void * vr_top;
int gr_offs;
int vr_offs;
};
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wuninitialized"
#pragma GCC diagnostic ignored "-Wvolatile-register-var"
extern "C" void vtableSlotCall(
unsigned long gpr0, unsigned long gpr1, unsigned long gpr2,
unsigned long gpr3, unsigned long gpr4, unsigned long gpr5,
unsigned long gpr6, unsigned long gpr7, double fpr0, double fpr1,
double fpr2, double fpr3, double fpr4, double fpr5, double fpr6,
double fpr7, ...)
{
register void * volatile indirectRet asm ("x8");
register sal_Int32 volatile functionIndex asm ("x9");
register sal_Int32 volatile vtableOffset asm ("x10");
va_list ap;
va_start(ap, fpr7);
assert(sizeof (va_list) == sizeof (aarch64_va_list));
unsigned long gpr[8];
gpr[0] = gpr0;
gpr[1] = gpr1;
gpr[2] = gpr2;
gpr[3] = gpr3;
gpr[4] = gpr4;
gpr[5] = gpr5;
gpr[6] = gpr6;
gpr[7] = gpr7;
double fpr[8];
fpr[0] = fpr0;
fpr[1] = fpr1;
fpr[2] = fpr2;
fpr[3] = fpr3;
fpr[4] = fpr4;
fpr[5] = fpr5;
fpr[6] = fpr6;
fpr[7] = fpr7;
vtableCall(
functionIndex, vtableOffset, gpr,
reinterpret_cast<unsigned long *>(fpr),<--- Casting from double * to unsigned long * is not portable due to different binary data representations on different platforms.
static_cast<unsigned long *>(
reinterpret_cast<aarch64_va_list *>(&ap)->stack),
indirectRet);
asm volatile(
"ldp x0, x1, [%[gpr_]]\n\t"
"ldp d0, d1, [%[fpr_]]\n\t"
"ldp d2, d3, [%[fpr_], #16]\n\t"
:: [gpr_]"r" (gpr), [fpr_]"r" (fpr)
: "r0", "r1", "v0", "v1", "v2", "v3");
va_end(ap);
}
#pragma GCC diagnostic pop
std::size_t const codeSnippetSize = 8 * 4;
unsigned char * generateCodeSnippet(
unsigned char * code, sal_Int32 functionIndex, sal_Int32 vtableOffset)
{
// movz x9, <low functionIndex>
reinterpret_cast<unsigned int *>(code)[0] = 0xD2800009
| ((functionIndex & 0xFFFF) << 5);
// movk x9, <high functionIndex>, LSL #16
reinterpret_cast<unsigned int *>(code)[1] = 0xF2A00009
| ((functionIndex >> 16) << 5);
// movz x10, <low vtableOffset>
reinterpret_cast<unsigned int *>(code)[2] = 0xD280000A
| ((vtableOffset & 0xFFFF) << 5);
// movk x10, <high vtableOffset>, LSL #16
reinterpret_cast<unsigned int *>(code)[3] = 0xF2A0000A
| ((vtableOffset >> 16) << 5);
// ldr x11, +2*4
reinterpret_cast<unsigned int *>(code)[4] = 0x5800004B;
// br x11
reinterpret_cast<unsigned int *>(code)[5] = 0xD61F0160;
reinterpret_cast<unsigned long *>(code)[3]
= reinterpret_cast<unsigned long>(&vtableSlotCall);
return code + codeSnippetSize;
}
}
struct bridges::cpp_uno::shared::VtableFactory::Slot { void * fn; };
bridges::cpp_uno::shared::VtableFactory::Slot *
bridges::cpp_uno::shared::VtableFactory::mapBlockToVtable(void * block) {
return static_cast<Slot *>(block) + 2;
}
std::size_t bridges::cpp_uno::shared::VtableFactory::getBlockSize(
sal_Int32 slotCount)
{
return (slotCount + 2) * sizeof (Slot) + slotCount * codeSnippetSize;
}
bridges::cpp_uno::shared::VtableFactory::Slot *
bridges::cpp_uno::shared::VtableFactory::initializeBlock(
void * block, sal_Int32 slotCount, sal_Int32,
typelib_InterfaceTypeDescription *)
{
Slot * slots = mapBlockToVtable(block);
slots[-2].fn = 0;
slots[-1].fn = 0;
return slots + slotCount;
}
unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
Slot ** slots, unsigned char * code, sal_PtrDiff writetoexecdiff,
typelib_InterfaceTypeDescription const * type, sal_Int32 functionOffset,
sal_Int32 functionCount, sal_Int32 vtableOffset)
{
(*slots) -= functionCount;
Slot * s = *slots;
for (sal_Int32 i = 0; i != type->nMembers; ++i) {
typelib_TypeDescription * td = 0;
TYPELIB_DANGER_GET(&td, type->ppMembers[i]);
assert(td != 0);
switch (td->eTypeClass) {
case typelib_TypeClass_INTERFACE_ATTRIBUTE:
{
typelib_InterfaceAttributeTypeDescription * atd
= reinterpret_cast<
typelib_InterfaceAttributeTypeDescription *>(td);
// Getter:
(s++)->fn = code + writetoexecdiff;
code = generateCodeSnippet(
code, functionOffset++, vtableOffset);
// Setter:
if (!atd->bReadOnly) {
(s++)->fn = code + writetoexecdiff;
code = generateCodeSnippet(
code, functionOffset++, vtableOffset);
}
break;
}
case typelib_TypeClass_INTERFACE_METHOD:
(s++)->fn = code + writetoexecdiff;
code = generateCodeSnippet(code, functionOffset++, vtableOffset);
break;
default:
assert(false);
}
TYPELIB_DANGER_RELEASE(td);
}
return code;
}
void bridges::cpp_uno::shared::VtableFactory::flushCode(
unsigned char const * begin, unsigned char const * end)
{
#ifndef ANDROID
static void (*clear_cache)(unsigned char const *, unsigned char const *)
= (void (*)(unsigned char const *, unsigned char const *)) dlsym(
RTLD_DEFAULT, "__clear_cache");
(*clear_cache)(begin, end);
#else
__builtin___clear_cache((char*)begin, (char*)end);
#endif
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|