LLVM  8.0.1
OrcABISupport.cpp
Go to the documentation of this file.
1 //===------------- OrcABISupport.cpp - ABI specific support code ----------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/ExecutionEngine/Orc/OrcABISupport.h"
11 #include "llvm/Support/Process.h"
12 
13 namespace llvm {
14 namespace orc {
15 
16 void OrcAArch64::writeResolverCode(uint8_t *ResolverMem, JITReentryFn ReentryFn,
17  void *CallbackMgr) {
18 
19  const uint32_t ResolverCode[] = {
20  // resolver_entry:
21  0xa9bf47fd, // 0x000: stp x29, x17, [sp, #-16]!
22  0x910003fd, // 0x004: mov x29, sp
23  0xa9bf73fb, // 0x008: stp x27, x28, [sp, #-16]!
24  0xa9bf6bf9, // 0x00c: stp x25, x26, [sp, #-16]!
25  0xa9bf63f7, // 0x010: stp x23, x24, [sp, #-16]!
26  0xa9bf5bf5, // 0x014: stp x21, x22, [sp, #-16]!
27  0xa9bf53f3, // 0x018: stp x19, x20, [sp, #-16]!
28  0xa9bf3fee, // 0x01c: stp x14, x15, [sp, #-16]!
29  0xa9bf37ec, // 0x020: stp x12, x13, [sp, #-16]!
30  0xa9bf2fea, // 0x024: stp x10, x11, [sp, #-16]!
31  0xa9bf27e8, // 0x028: stp x8, x9, [sp, #-16]!
32  0xa9bf1fe6, // 0x02c: stp x6, x7, [sp, #-16]!
33  0xa9bf17e4, // 0x030: stp x4, x5, [sp, #-16]!
34  0xa9bf0fe2, // 0x034: stp x2, x3, [sp, #-16]!
35  0xa9bf07e0, // 0x038: stp x0, x1, [sp, #-16]!
36  0xadbf7ffe, // 0x03c: stp q30, q31, [sp, #-32]!
37  0xadbf77fc, // 0x040: stp q28, q29, [sp, #-32]!
38  0xadbf6ffa, // 0x044: stp q26, q27, [sp, #-32]!
39  0xadbf67f8, // 0x048: stp q24, q25, [sp, #-32]!
40  0xadbf5ff6, // 0x04c: stp q22, q23, [sp, #-32]!
41  0xadbf57f4, // 0x050: stp q20, q21, [sp, #-32]!
42  0xadbf4ff2, // 0x054: stp q18, q19, [sp, #-32]!
43  0xadbf47f0, // 0x058: stp q16, q17, [sp, #-32]!
44  0xadbf3fee, // 0x05c: stp q14, q15, [sp, #-32]!
45  0xadbf37ec, // 0x060: stp q12, q13, [sp, #-32]!
46  0xadbf2fea, // 0x064: stp q10, q11, [sp, #-32]!
47  0xadbf27e8, // 0x068: stp q8, q9, [sp, #-32]!
48  0xadbf1fe6, // 0x06c: stp q6, q7, [sp, #-32]!
49  0xadbf17e4, // 0x070: stp q4, q5, [sp, #-32]!
50  0xadbf0fe2, // 0x074: stp q2, q3, [sp, #-32]!
51  0xadbf07e0, // 0x078: stp q0, q1, [sp, #-32]!
52  0x580004e0, // 0x07c: ldr x0, Lcallbackmgr
53  0xaa1e03e1, // 0x080: mov x1, x30
54  0xd1003021, // 0x084: sub x1, x1, #12
55  0x58000442, // 0x088: ldr x2, Lreentry_fn_ptr
56  0xd63f0040, // 0x08c: blr x2
57  0xaa0003f1, // 0x090: mov x17, x0
58  0xacc107e0, // 0x094: ldp q0, q1, [sp], #32
59  0xacc10fe2, // 0x098: ldp q2, q3, [sp], #32
60  0xacc117e4, // 0x09c: ldp q4, q5, [sp], #32
61  0xacc11fe6, // 0x0a0: ldp q6, q7, [sp], #32
62  0xacc127e8, // 0x0a4: ldp q8, q9, [sp], #32
63  0xacc12fea, // 0x0a8: ldp q10, q11, [sp], #32
64  0xacc137ec, // 0x0ac: ldp q12, q13, [sp], #32
65  0xacc13fee, // 0x0b0: ldp q14, q15, [sp], #32
66  0xacc147f0, // 0x0b4: ldp q16, q17, [sp], #32
67  0xacc14ff2, // 0x0b8: ldp q18, q19, [sp], #32
68  0xacc157f4, // 0x0bc: ldp q20, q21, [sp], #32
69  0xacc15ff6, // 0x0c0: ldp q22, q23, [sp], #32
70  0xacc167f8, // 0x0c4: ldp q24, q25, [sp], #32
71  0xacc16ffa, // 0x0c8: ldp q26, q27, [sp], #32
72  0xacc177fc, // 0x0cc: ldp q28, q29, [sp], #32
73  0xacc17ffe, // 0x0d0: ldp q30, q31, [sp], #32
74  0xa8c107e0, // 0x0d4: ldp x0, x1, [sp], #16
75  0xa8c10fe2, // 0x0d8: ldp x2, x3, [sp], #16
76  0xa8c117e4, // 0x0dc: ldp x4, x5, [sp], #16
77  0xa8c11fe6, // 0x0e0: ldp x6, x7, [sp], #16
78  0xa8c127e8, // 0x0e4: ldp x8, x9, [sp], #16
79  0xa8c12fea, // 0x0e8: ldp x10, x11, [sp], #16
80  0xa8c137ec, // 0x0ec: ldp x12, x13, [sp], #16
81  0xa8c13fee, // 0x0f0: ldp x14, x15, [sp], #16
82  0xa8c153f3, // 0x0f4: ldp x19, x20, [sp], #16
83  0xa8c15bf5, // 0x0f8: ldp x21, x22, [sp], #16
84  0xa8c163f7, // 0x0fc: ldp x23, x24, [sp], #16
85  0xa8c16bf9, // 0x100: ldp x25, x26, [sp], #16
86  0xa8c173fb, // 0x104: ldp x27, x28, [sp], #16
87  0xa8c17bfd, // 0x108: ldp x29, x30, [sp], #16
88  0xd65f0220, // 0x10c: ret x17
89  0x01234567, // 0x110: Lreentry_fn_ptr:
90  0xdeadbeef, // 0x114: .quad 0
91  0x98765432, // 0x118: Lcallbackmgr:
92  0xcafef00d // 0x11c: .quad 0
93  };
94 
95  const unsigned ReentryFnAddrOffset = 0x110;
96  const unsigned CallbackMgrAddrOffset = 0x118;
97 
98  memcpy(ResolverMem, ResolverCode, sizeof(ResolverCode));
99  memcpy(ResolverMem + ReentryFnAddrOffset, &ReentryFn, sizeof(ReentryFn));
100  memcpy(ResolverMem + CallbackMgrAddrOffset, &CallbackMgr,
101  sizeof(CallbackMgr));
102 }
103 
104 void OrcAArch64::writeTrampolines(uint8_t *TrampolineMem, void *ResolverAddr,
105  unsigned NumTrampolines) {
106 
107  unsigned OffsetToPtr = alignTo(NumTrampolines * TrampolineSize, 8);
108 
109  memcpy(TrampolineMem + OffsetToPtr, &ResolverAddr, sizeof(void *));
110 
111  // OffsetToPtr is actually the offset from the PC for the 2nd instruction, so
112  // subtract 32-bits.
113  OffsetToPtr -= 4;
114 
115  uint32_t *Trampolines = reinterpret_cast<uint32_t *>(TrampolineMem);
116 
117  for (unsigned I = 0; I < NumTrampolines; ++I, OffsetToPtr -= TrampolineSize) {
118  Trampolines[3 * I + 0] = 0xaa1e03f1; // mov x17, x30
119  Trampolines[3 * I + 1] = 0x58000010 | (OffsetToPtr << 3); // adr x16, Lptr
120  Trampolines[3 * I + 2] = 0xd63f0200; // blr x16
121  }
122 
123 }
124 
125 Error OrcAArch64::emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo,
126  unsigned MinStubs,
127  void *InitialPtrVal) {
128  // Stub format is:
129  //
130  // .section __orc_stubs
131  // stub1:
132  // ldr x0, ptr1 ; PC-rel load of ptr1
133  // br x0 ; Jump to resolver
134  // stub2:
135  // ldr x0, ptr2 ; PC-rel load of ptr2
136  // br x0 ; Jump to resolver
137  //
138  // ...
139  //
140  // .section __orc_ptrs
141  // ptr1:
142  // .quad 0x0
143  // ptr2:
144  // .quad 0x0
145  //
146  // ...
147 
148  const unsigned StubSize = IndirectStubsInfo::StubSize;
149 
150  // Emit at least MinStubs, rounded up to fill the pages allocated.
151  unsigned PageSize = sys::Process::getPageSize();
152  unsigned NumPages = ((MinStubs * StubSize) + (PageSize - 1)) / PageSize;
153  unsigned NumStubs = (NumPages * PageSize) / StubSize;
154 
155  // Allocate memory for stubs and pointers in one call.
156  std::error_code EC;
157  auto StubsMem = sys::OwningMemoryBlock(sys::Memory::allocateMappedMemory(
158  2 * NumPages * PageSize, nullptr,
159  sys::Memory::MF_READ | sys::Memory::MF_WRITE, EC));
160 
161  if (EC)
162  return errorCodeToError(EC);
163 
164  // Create separate MemoryBlocks representing the stubs and pointers.
165  sys::MemoryBlock StubsBlock(StubsMem.base(), NumPages * PageSize);
166  sys::MemoryBlock PtrsBlock(static_cast<char *>(StubsMem.base()) +
167  NumPages * PageSize,
168  NumPages * PageSize);
169 
170  // Populate the stubs page stubs and mark it executable.
171  uint64_t *Stub = reinterpret_cast<uint64_t *>(StubsBlock.base());
172  uint64_t PtrOffsetField = static_cast<uint64_t>(NumPages * PageSize)
173  << 3;
174 
175  for (unsigned I = 0; I < NumStubs; ++I)
176  Stub[I] = 0xd61f020058000010 | PtrOffsetField;
177 
178  if (auto EC = sys::Memory::protectMappedMemory(
179  StubsBlock, sys::Memory::MF_READ | sys::Memory::MF_EXEC))
180  return errorCodeToError(EC);
181 
182  // Initialize all pointers to point at FailureAddress.
183  void **Ptr = reinterpret_cast<void **>(PtrsBlock.base());
184  for (unsigned I = 0; I < NumStubs; ++I)
185  Ptr[I] = InitialPtrVal;
186 
187  StubsInfo = IndirectStubsInfo(NumStubs, std::move(StubsMem));
188 
189  return Error::success();
190 }
191 
192 void OrcX86_64_Base::writeTrampolines(uint8_t *TrampolineMem,
193  void *ResolverAddr,
194  unsigned NumTrampolines) {
195 
196  unsigned OffsetToPtr = NumTrampolines * TrampolineSize;
197 
198  memcpy(TrampolineMem + OffsetToPtr, &ResolverAddr, sizeof(void *));
199 
200  uint64_t *Trampolines = reinterpret_cast<uint64_t *>(TrampolineMem);
201  uint64_t CallIndirPCRel = 0xf1c40000000015ff;
202 
203  for (unsigned I = 0; I < NumTrampolines; ++I, OffsetToPtr -= TrampolineSize)
204  Trampolines[I] = CallIndirPCRel | ((OffsetToPtr - 6) << 16);
205 }
206 
207 Error OrcX86_64_Base::emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo,
208  unsigned MinStubs,
209  void *InitialPtrVal) {
210  // Stub format is:
211  //
212  // .section __orc_stubs
213  // stub1:
214  // jmpq *ptr1(%rip)
215  // .byte 0xC4 ; <- Invalid opcode padding.
216  // .byte 0xF1
217  // stub2:
218  // jmpq *ptr2(%rip)
219  //
220  // ...
221  //
222  // .section __orc_ptrs
223  // ptr1:
224  // .quad 0x0
225  // ptr2:
226  // .quad 0x0
227  //
228  // ...
229 
230  const unsigned StubSize = IndirectStubsInfo::StubSize;
231 
232  // Emit at least MinStubs, rounded up to fill the pages allocated.
233  unsigned PageSize = sys::Process::getPageSize();
234  unsigned NumPages = ((MinStubs * StubSize) + (PageSize - 1)) / PageSize;
235  unsigned NumStubs = (NumPages * PageSize) / StubSize;
236 
237  // Allocate memory for stubs and pointers in one call.
238  std::error_code EC;
239  auto StubsMem = sys::OwningMemoryBlock(sys::Memory::allocateMappedMemory(
240  2 * NumPages * PageSize, nullptr,
241  sys::Memory::MF_READ | sys::Memory::MF_WRITE, EC));
242 
243  if (EC)
244  return errorCodeToError(EC);
245 
246  // Create separate MemoryBlocks representing the stubs and pointers.
247  sys::MemoryBlock StubsBlock(StubsMem.base(), NumPages * PageSize);
248  sys::MemoryBlock PtrsBlock(static_cast<char *>(StubsMem.base()) +
249  NumPages * PageSize,
250  NumPages * PageSize);
251 
252  // Populate the stubs page stubs and mark it executable.
253  uint64_t *Stub = reinterpret_cast<uint64_t *>(StubsBlock.base());
254  uint64_t PtrOffsetField = static_cast<uint64_t>(NumPages * PageSize - 6)
255  << 16;
256  for (unsigned I = 0; I < NumStubs; ++I)
257  Stub[I] = 0xF1C40000000025ff | PtrOffsetField;
258 
259  if (auto EC = sys::Memory::protectMappedMemory(
260  StubsBlock, sys::Memory::MF_READ | sys::Memory::MF_EXEC))
261  return errorCodeToError(EC);
262 
263  // Initialize all pointers to point at FailureAddress.
264  void **Ptr = reinterpret_cast<void **>(PtrsBlock.base());
265  for (unsigned I = 0; I < NumStubs; ++I)
266  Ptr[I] = InitialPtrVal;
267 
268  StubsInfo = IndirectStubsInfo(NumStubs, std::move(StubsMem));
269 
270  return Error::success();
271 }
272 
273 void OrcX86_64_SysV::writeResolverCode(uint8_t *ResolverMem,
274  JITReentryFn ReentryFn,
275  void *CallbackMgr) {
276 
277  const uint8_t ResolverCode[] = {
278  // resolver_entry:
279  0x55, // 0x00: pushq %rbp
280  0x48, 0x89, 0xe5, // 0x01: movq %rsp, %rbp
281  0x50, // 0x04: pushq %rax
282  0x53, // 0x05: pushq %rbx
283  0x51, // 0x06: pushq %rcx
284  0x52, // 0x07: pushq %rdx
285  0x56, // 0x08: pushq %rsi
286  0x57, // 0x09: pushq %rdi
287  0x41, 0x50, // 0x0a: pushq %r8
288  0x41, 0x51, // 0x0c: pushq %r9
289  0x41, 0x52, // 0x0e: pushq %r10
290  0x41, 0x53, // 0x10: pushq %r11
291  0x41, 0x54, // 0x12: pushq %r12
292  0x41, 0x55, // 0x14: pushq %r13
293  0x41, 0x56, // 0x16: pushq %r14
294  0x41, 0x57, // 0x18: pushq %r15
295  0x48, 0x81, 0xec, 0x08, 0x02, 0x00, 0x00, // 0x1a: subq 0x208, %rsp
296  0x48, 0x0f, 0xae, 0x04, 0x24, // 0x21: fxsave64 (%rsp)
297  0x48, 0xbf, // 0x26: movabsq <CBMgr>, %rdi
298 
299  // 0x28: Callback manager addr.
300  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
301 
302  0x48, 0x8b, 0x75, 0x08, // 0x30: movq 8(%rbp), %rsi
303  0x48, 0x83, 0xee, 0x06, // 0x34: subq $6, %rsi
304  0x48, 0xb8, // 0x38: movabsq <REntry>, %rax
305 
306  // 0x3a: JIT re-entry fn addr:
307  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
308 
309  0xff, 0xd0, // 0x42: callq *%rax
310  0x48, 0x89, 0x45, 0x08, // 0x44: movq %rax, 8(%rbp)
311  0x48, 0x0f, 0xae, 0x0c, 0x24, // 0x48: fxrstor64 (%rsp)
312  0x48, 0x81, 0xc4, 0x08, 0x02, 0x00, 0x00, // 0x4d: addq 0x208, %rsp
313  0x41, 0x5f, // 0x54: popq %r15
314  0x41, 0x5e, // 0x56: popq %r14
315  0x41, 0x5d, // 0x58: popq %r13
316  0x41, 0x5c, // 0x5a: popq %r12
317  0x41, 0x5b, // 0x5c: popq %r11
318  0x41, 0x5a, // 0x5e: popq %r10
319  0x41, 0x59, // 0x60: popq %r9
320  0x41, 0x58, // 0x62: popq %r8
321  0x5f, // 0x64: popq %rdi
322  0x5e, // 0x65: popq %rsi
323  0x5a, // 0x66: popq %rdx
324  0x59, // 0x67: popq %rcx
325  0x5b, // 0x68: popq %rbx
326  0x58, // 0x69: popq %rax
327  0x5d, // 0x6a: popq %rbp
328  0xc3, // 0x6b: retq
329  };
330 
331  const unsigned ReentryFnAddrOffset = 0x3a;
332  const unsigned CallbackMgrAddrOffset = 0x28;
333 
334  memcpy(ResolverMem, ResolverCode, sizeof(ResolverCode));
335  memcpy(ResolverMem + ReentryFnAddrOffset, &ReentryFn, sizeof(ReentryFn));
336  memcpy(ResolverMem + CallbackMgrAddrOffset, &CallbackMgr,
337  sizeof(CallbackMgr));
338 }
339 
340 void OrcX86_64_Win32::writeResolverCode(uint8_t *ResolverMem,
341  JITReentryFn ReentryFn,
342  void *CallbackMgr) {
343 
344  // resolverCode is similar to OrcX86_64 with differences specific to windows x64 calling convention:
345  // arguments go into rcx, rdx and come in reverse order, shadow space allocation on stack
346  const uint8_t ResolverCode[] = {
347  // resolver_entry:
348  0x55, // 0x00: pushq %rbp
349  0x48, 0x89, 0xe5, // 0x01: movq %rsp, %rbp
350  0x50, // 0x04: pushq %rax
351  0x53, // 0x05: pushq %rbx
352  0x51, // 0x06: pushq %rcx
353  0x52, // 0x07: pushq %rdx
354  0x56, // 0x08: pushq %rsi
355  0x57, // 0x09: pushq %rdi
356  0x41, 0x50, // 0x0a: pushq %r8
357  0x41, 0x51, // 0x0c: pushq %r9
358  0x41, 0x52, // 0x0e: pushq %r10
359  0x41, 0x53, // 0x10: pushq %r11
360  0x41, 0x54, // 0x12: pushq %r12
361  0x41, 0x55, // 0x14: pushq %r13
362  0x41, 0x56, // 0x16: pushq %r14
363  0x41, 0x57, // 0x18: pushq %r15
364  0x48, 0x81, 0xec, 0x08, 0x02, 0x00, 0x00, // 0x1a: subq 0x208, %rsp
365  0x48, 0x0f, 0xae, 0x04, 0x24, // 0x21: fxsave64 (%rsp)
366 
367  0x48, 0xb9, // 0x26: movabsq <CBMgr>, %rcx
368  // 0x28: Callback manager addr.
369  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
370 
371  0x48, 0x8B, 0x55, 0x08, // 0x30: mov rdx, [rbp+0x8]
372  0x48, 0x83, 0xea, 0x06, // 0x34: sub rdx, 0x6
373 
374  0x48, 0xb8, // 0x38: movabsq <REntry>, %rax
375  // 0x3a: JIT re-entry fn addr:
376  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
377 
378  // 0x42: sub rsp, 0x20 (Allocate shadow space)
379  0x48, 0x83, 0xEC, 0x20,
380  0xff, 0xd0, // 0x46: callq *%rax
381 
382  // 0x48: add rsp, 0x20 (Free shadow space)
383  0x48, 0x83, 0xC4, 0x20,
384 
385  0x48, 0x89, 0x45, 0x08, // 0x4C: movq %rax, 8(%rbp)
386  0x48, 0x0f, 0xae, 0x0c, 0x24, // 0x50: fxrstor64 (%rsp)
387  0x48, 0x81, 0xc4, 0x08, 0x02, 0x00, 0x00, // 0x55: addq 0x208, %rsp
388  0x41, 0x5f, // 0x5C: popq %r15
389  0x41, 0x5e, // 0x5E: popq %r14
390  0x41, 0x5d, // 0x60: popq %r13
391  0x41, 0x5c, // 0x62: popq %r12
392  0x41, 0x5b, // 0x64: popq %r11
393  0x41, 0x5a, // 0x66: popq %r10
394  0x41, 0x59, // 0x68: popq %r9
395  0x41, 0x58, // 0x6a: popq %r8
396  0x5f, // 0x6c: popq %rdi
397  0x5e, // 0x6d: popq %rsi
398  0x5a, // 0x6e: popq %rdx
399  0x59, // 0x6f: popq %rcx
400  0x5b, // 0x70: popq %rbx
401  0x58, // 0x71: popq %rax
402  0x5d, // 0x72: popq %rbp
403  0xc3, // 0x73: retq
404  };
405 
406 
407  const unsigned ReentryFnAddrOffset = 0x3a;
408  const unsigned CallbackMgrAddrOffset = 0x28;
409 
410  memcpy(ResolverMem, ResolverCode, sizeof(ResolverCode));
411  memcpy(ResolverMem + ReentryFnAddrOffset, &ReentryFn, sizeof(ReentryFn));
412  memcpy(ResolverMem + CallbackMgrAddrOffset, &CallbackMgr,
413  sizeof(CallbackMgr));
414 }
415 
416 void OrcI386::writeResolverCode(uint8_t *ResolverMem, JITReentryFn ReentryFn,
417  void *CallbackMgr) {
418 
419  const uint8_t ResolverCode[] = {
420  // resolver_entry:
421  0x55, // 0x00: pushl %ebp
422  0x89, 0xe5, // 0x01: movl %esp, %ebp
423  0x54, // 0x03: pushl %esp
424  0x83, 0xe4, 0xf0, // 0x04: andl $-0x10, %esp
425  0x50, // 0x07: pushl %eax
426  0x53, // 0x08: pushl %ebx
427  0x51, // 0x09: pushl %ecx
428  0x52, // 0x0a: pushl %edx
429  0x56, // 0x0b: pushl %esi
430  0x57, // 0x0c: pushl %edi
431  0x81, 0xec, 0x18, 0x02, 0x00, 0x00, // 0x0d: subl $0x218, %esp
432  0x0f, 0xae, 0x44, 0x24, 0x10, // 0x13: fxsave 0x10(%esp)
433  0x8b, 0x75, 0x04, // 0x18: movl 0x4(%ebp), %esi
434  0x83, 0xee, 0x05, // 0x1b: subl $0x5, %esi
435  0x89, 0x74, 0x24, 0x04, // 0x1e: movl %esi, 0x4(%esp)
436  0xc7, 0x04, 0x24, 0x00, 0x00, 0x00,
437  0x00, // 0x22: movl <cbmgr>, (%esp)
438  0xb8, 0x00, 0x00, 0x00, 0x00, // 0x29: movl <reentry>, %eax
439  0xff, 0xd0, // 0x2e: calll *%eax
440  0x89, 0x45, 0x04, // 0x30: movl %eax, 0x4(%ebp)
441  0x0f, 0xae, 0x4c, 0x24, 0x10, // 0x33: fxrstor 0x10(%esp)
442  0x81, 0xc4, 0x18, 0x02, 0x00, 0x00, // 0x38: addl $0x218, %esp
443  0x5f, // 0x3e: popl %edi
444  0x5e, // 0x3f: popl %esi
445  0x5a, // 0x40: popl %edx
446  0x59, // 0x41: popl %ecx
447  0x5b, // 0x42: popl %ebx
448  0x58, // 0x43: popl %eax
449  0x8b, 0x65, 0xfc, // 0x44: movl -0x4(%ebp), %esp
450  0x5d, // 0x48: popl %ebp
451  0xc3 // 0x49: retl
452  };
453 
454  const unsigned ReentryFnAddrOffset = 0x2a;
455  const unsigned CallbackMgrAddrOffset = 0x25;
456 
457  memcpy(ResolverMem, ResolverCode, sizeof(ResolverCode));
458  memcpy(ResolverMem + ReentryFnAddrOffset, &ReentryFn, sizeof(ReentryFn));
459  memcpy(ResolverMem + CallbackMgrAddrOffset, &CallbackMgr,
460  sizeof(CallbackMgr));
461 }
462 
463 void OrcI386::writeTrampolines(uint8_t *TrampolineMem, void *ResolverAddr,
464  unsigned NumTrampolines) {
465 
466  uint64_t CallRelImm = 0xF1C4C400000000e8;
467  uint64_t Resolver = reinterpret_cast<uint64_t>(ResolverAddr);
468  uint64_t ResolverRel =
469  Resolver - reinterpret_cast<uint64_t>(TrampolineMem) - 5;
470 
471  uint64_t *Trampolines = reinterpret_cast<uint64_t *>(TrampolineMem);
472  for (unsigned I = 0; I < NumTrampolines; ++I, ResolverRel -= TrampolineSize)
473  Trampolines[I] = CallRelImm | (ResolverRel << 8);
474 }
475 
476 Error OrcI386::emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo,
477  unsigned MinStubs, void *InitialPtrVal) {
478  // Stub format is:
479  //
480  // .section __orc_stubs
481  // stub1:
482  // jmpq *ptr1
483  // .byte 0xC4 ; <- Invalid opcode padding.
484  // .byte 0xF1
485  // stub2:
486  // jmpq *ptr2
487  //
488  // ...
489  //
490  // .section __orc_ptrs
491  // ptr1:
492  // .quad 0x0
493  // ptr2:
494  // .quad 0x0
495  //
496  // ...
497 
498  const unsigned StubSize = IndirectStubsInfo::StubSize;
499 
500  // Emit at least MinStubs, rounded up to fill the pages allocated.
501  unsigned PageSize = sys::Process::getPageSize();
502  unsigned NumPages = ((MinStubs * StubSize) + (PageSize - 1)) / PageSize;
503  unsigned NumStubs = (NumPages * PageSize) / StubSize;
504 
505  // Allocate memory for stubs and pointers in one call.
506  std::error_code EC;
507  auto StubsMem = sys::OwningMemoryBlock(sys::Memory::allocateMappedMemory(
508  2 * NumPages * PageSize, nullptr,
509  sys::Memory::MF_READ | sys::Memory::MF_WRITE, EC));
510 
511  if (EC)
512  return errorCodeToError(EC);
513 
514  // Create separate MemoryBlocks representing the stubs and pointers.
515  sys::MemoryBlock StubsBlock(StubsMem.base(), NumPages * PageSize);
516  sys::MemoryBlock PtrsBlock(static_cast<char *>(StubsMem.base()) +
517  NumPages * PageSize,
518  NumPages * PageSize);
519 
520  // Populate the stubs page stubs and mark it executable.
521  uint64_t *Stub = reinterpret_cast<uint64_t *>(StubsBlock.base());
522  uint64_t PtrAddr = reinterpret_cast<uint64_t>(PtrsBlock.base());
523  for (unsigned I = 0; I < NumStubs; ++I, PtrAddr += 4)
524  Stub[I] = 0xF1C40000000025ff | (PtrAddr << 16);
525 
526  if (auto EC = sys::Memory::protectMappedMemory(
527  StubsBlock, sys::Memory::MF_READ | sys::Memory::MF_EXEC))
528  return errorCodeToError(EC);
529 
530  // Initialize all pointers to point at FailureAddress.
531  void **Ptr = reinterpret_cast<void **>(PtrsBlock.base());
532  for (unsigned I = 0; I < NumStubs; ++I)
533  Ptr[I] = InitialPtrVal;
534 
535  StubsInfo = IndirectStubsInfo(NumStubs, std::move(StubsMem));
536 
537  return Error::success();
538 }
539 
540 void OrcMips32_Base::writeResolverCode(uint8_t *ResolverMem,
541  JITReentryFn ReentryFn,
542  void *CallbackMgr, bool isBigEndian) {
543 
544  const uint32_t ResolverCode[] = {
545  // resolver_entry:
546  0x27bdff98, // 0x00: addiu $sp,$sp,-104
547  0xafa20000, // 0x04: sw $v0,0($sp)
548  0xafa30004, // 0x08: sw $v1,4($sp)
549  0xafa40008, // 0x0c: sw $a0,8($sp)
550  0xafa5000c, // 0x10: sw $a1,12($sp)
551  0xafa60010, // 0x14: sw $a2,16($sp)
552  0xafa70014, // 0x18: sw $a3,20($sp)
553  0xafb00018, // 0x1c: sw $s0,24($sp)
554  0xafb1001c, // 0x20: sw $s1,28($sp)
555  0xafb20020, // 0x24: sw $s2,32($sp)
556  0xafb30024, // 0x28: sw $s3,36($sp)
557  0xafb40028, // 0x2c: sw $s4,40($sp)
558  0xafb5002c, // 0x30: sw $s5,44($sp)
559  0xafb60030, // 0x34: sw $s6,48($sp)
560  0xafb70034, // 0x38: sw $s7,52($sp)
561  0xafa80038, // 0x3c: sw $t0,56($sp)
562  0xafa9003c, // 0x40: sw $t1,60($sp)
563  0xafaa0040, // 0x44: sw $t2,64($sp)
564  0xafab0044, // 0x48: sw $t3,68($sp)
565  0xafac0048, // 0x4c: sw $t4,72($sp)
566  0xafad004c, // 0x50: sw $t5,76($sp)
567  0xafae0050, // 0x54: sw $t6,80($sp)
568  0xafaf0054, // 0x58: sw $t7,84($sp)
569  0xafb80058, // 0x5c: sw $t8,88($sp)
570  0xafb9005c, // 0x60: sw $t9,92($sp)
571  0xafbe0060, // 0x64: sw $fp,96($sp)
572  0xafbf0064, // 0x68: sw $ra,100($sp)
573 
574  // Callback manager addr.
575  0x00000000, // 0x6c: lui $a0,callbackmgr
576  0x00000000, // 0x70: addiu $a0,$a0,callbackmgr
577 
578  0x03e02825, // 0x74: move $a1, $ra
579  0x24a5ffec, // 0x78: addiu $a1,$a1,-20
580 
581  // JIT re-entry fn addr:
582  0x00000000, // 0x7c: lui $t9,reentry
583  0x00000000, // 0x80: addiu $t9,$t9,reentry
584 
585  0x0320f809, // 0x84: jalr $t9
586  0x00000000, // 0x88: nop
587  0x8fbf0064, // 0x8c: lw $ra,100($sp)
588  0x8fbe0060, // 0x90: lw $fp,96($sp)
589  0x8fb9005c, // 0x94: lw $t9,92($sp)
590  0x8fb80058, // 0x98: lw $t8,88($sp)
591  0x8faf0054, // 0x9c: lw $t7,84($sp)
592  0x8fae0050, // 0xa0: lw $t6,80($sp)
593  0x8fad004c, // 0xa4: lw $t5,76($sp)
594  0x8fac0048, // 0xa8: lw $t4,72($sp)
595  0x8fab0044, // 0xac: lw $t3,68($sp)
596  0x8faa0040, // 0xb0: lw $t2,64($sp)
597  0x8fa9003c, // 0xb4: lw $t1,60($sp)
598  0x8fa80038, // 0xb8: lw $t0,56($sp)
599  0x8fb70034, // 0xbc: lw $s7,52($sp)
600  0x8fb60030, // 0xc0: lw $s6,48($sp)
601  0x8fb5002c, // 0xc4: lw $s5,44($sp)
602  0x8fb40028, // 0xc8: lw $s4,40($sp)
603  0x8fb30024, // 0xcc: lw $s3,36($sp)
604  0x8fb20020, // 0xd0: lw $s2,32($sp)
605  0x8fb1001c, // 0xd4: lw $s1,28($sp)
606  0x8fb00018, // 0xd8: lw $s0,24($sp)
607  0x8fa70014, // 0xdc: lw $a3,20($sp)
608  0x8fa60010, // 0xe0: lw $a2,16($sp)
609  0x8fa5000c, // 0xe4: lw $a1,12($sp)
610  0x8fa40008, // 0xe8: lw $a0,8($sp)
611  0x27bd0068, // 0xec: addiu $sp,$sp,104
612  0x0300f825, // 0xf0: move $ra, $t8
613  0x03200008, // 0xf4: jr $t9
614  0x00000000, // 0xf8: move $t9, $v0/v1
615  };
616 
617  const unsigned ReentryFnAddrOffset = 0x7c; // JIT re-entry fn addr lui
618  const unsigned CallbackMgrAddrOffset = 0x6c; // Callback manager addr lui
619  const unsigned Offsett = 0xf8;
620 
621  memcpy(ResolverMem, ResolverCode, sizeof(ResolverCode));
622 
623  // Depending on endian return value will be in v0 or v1.
624  uint32_t MoveVxT9 = isBigEndian ? 0x0060c825 : 0x0040c825;
625  memcpy(ResolverMem + Offsett, &MoveVxT9, sizeof(MoveVxT9));
626 
627  uint64_t CallMgrAddr = reinterpret_cast<uint64_t>(CallbackMgr);
628  uint32_t CallMgrLUi = 0x3c040000 | (((CallMgrAddr + 0x8000) >> 16) & 0xFFFF);
629  uint32_t CallMgrADDiu = 0x24840000 | ((CallMgrAddr) & 0xFFFF);
630  memcpy(ResolverMem + CallbackMgrAddrOffset, &CallMgrLUi, sizeof(CallMgrLUi));
631  memcpy(ResolverMem + CallbackMgrAddrOffset + 4, &CallMgrADDiu,
632  sizeof(CallMgrADDiu));
633 
634  uint64_t ReentryAddr = reinterpret_cast<uint64_t>(ReentryFn);
635  uint32_t ReentryLUi = 0x3c190000 | (((ReentryAddr + 0x8000) >> 16) & 0xFFFF);
636  uint32_t ReentryADDiu = 0x27390000 | ((ReentryAddr) & 0xFFFF);
637  memcpy(ResolverMem + ReentryFnAddrOffset, &ReentryLUi, sizeof(ReentryLUi));
638  memcpy(ResolverMem + ReentryFnAddrOffset + 4, &ReentryADDiu,
639  sizeof(ReentryADDiu));
640 }
641 
642 void OrcMips32_Base::writeTrampolines(uint8_t *TrampolineMem,
643  void *ResolverAddr,
644  unsigned NumTrampolines) {
645 
646  uint32_t *Trampolines = reinterpret_cast<uint32_t *>(TrampolineMem);
647  uint64_t ResolveAddr = reinterpret_cast<uint64_t>(ResolverAddr);
648  uint32_t RHiAddr = ((ResolveAddr + 0x8000) >> 16);
649 
650  for (unsigned I = 0; I < NumTrampolines; ++I) {
651  Trampolines[5 * I + 0] = 0x03e0c025; // move $t8,$ra
652  Trampolines[5 * I + 1] = 0x3c190000 | (RHiAddr & 0xFFFF); // lui $t9,resolveAddr
653  Trampolines[5 * I + 2] = 0x27390000 | (ResolveAddr & 0xFFFF); // addiu $t9,$t9,resolveAddr
654  Trampolines[5 * I + 3] = 0x0320f809; // jalr $t9
655  Trampolines[5 * I + 4] = 0x00000000; // nop
656  }
657 }
658 
659 Error OrcMips32_Base::emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo,
660  unsigned MinStubs,
661  void *InitialPtrVal) {
662  // Stub format is:
663  //
664  // .section __orc_stubs
665  // stub1:
666  // lui $t9, ptr1
667  // lw $t9, %lo(ptr1)($t9)
668  // jr $t9
669  // stub2:
670  // lui $t9, ptr2
671  // lw $t9,%lo(ptr1)($t9)
672  // jr $t9
673  //
674  // ...
675  //
676  // .section __orc_ptrs
677  // ptr1:
678  // .word 0x0
679  // ptr2:
680  // .word 0x0
681  //
682  // ...
683 
684  const unsigned StubSize = IndirectStubsInfo::StubSize;
685 
686  // Emit at least MinStubs, rounded up to fill the pages allocated.
687  unsigned PageSize = sys::Process::getPageSize();
688  unsigned NumPages = ((MinStubs * StubSize) + (PageSize - 1)) / PageSize;
689  unsigned NumStubs = (NumPages * PageSize) / StubSize;
690 
691  // Allocate memory for stubs and pointers in one call.
692  std::error_code EC;
693  auto StubsMem = sys::OwningMemoryBlock(sys::Memory::allocateMappedMemory(
694  2 * NumPages * PageSize, nullptr,
695  sys::Memory::MF_READ | sys::Memory::MF_WRITE, EC));
696 
697  if (EC)
698  return errorCodeToError(EC);
699 
700  // Create separate MemoryBlocks representing the stubs and pointers.
701  sys::MemoryBlock StubsBlock(StubsMem.base(), NumPages * PageSize);
702  sys::MemoryBlock PtrsBlock(static_cast<char *>(StubsMem.base()) +
703  NumPages * PageSize,
704  NumPages * PageSize);
705 
706  // Populate the stubs page stubs and mark it executable.
707  uint32_t *Stub = reinterpret_cast<uint32_t *>(StubsBlock.base());
708  uint64_t PtrAddr = reinterpret_cast<uint64_t>(Stub) + NumPages * PageSize;
709 
710  for (unsigned I = 0; I < NumStubs; ++I) {
711  uint32_t HiAddr = ((PtrAddr + 0x8000) >> 16);
712  Stub[4 * I + 0] = 0x3c190000 | (HiAddr & 0xFFFF); // lui $t9,ptr1
713  Stub[4 * I + 1] = 0x8f390000 | (PtrAddr & 0xFFFF); // lw $t9,%lo(ptr1)($t9)
714  Stub[4 * I + 2] = 0x03200008; // jr $t9
715  Stub[4 * I + 3] = 0x00000000; // nop
716  PtrAddr += 4;
717  }
718 
719  if (auto EC = sys::Memory::protectMappedMemory(
720  StubsBlock, sys::Memory::MF_READ | sys::Memory::MF_EXEC))
721  return errorCodeToError(EC);
722 
723  // Initialize all pointers to point at FailureAddress.
724  void **Ptr = reinterpret_cast<void **>(PtrsBlock.base());
725  for (unsigned I = 0; I < NumStubs; ++I)
726  Ptr[I] = InitialPtrVal;
727 
728  StubsInfo = IndirectStubsInfo(NumStubs, std::move(StubsMem));
729 
730  return Error::success();
731 }
732 
733 void OrcMips64::writeResolverCode(uint8_t *ResolverMem, JITReentryFn ReentryFn,
734  void *CallbackMgr) {
735 
736  const uint32_t ResolverCode[] = {
737  //resolver_entry:
738  0x67bdff30, // 0x00: daddiu $sp,$sp,-208
739  0xffa20000, // 0x04: sd v0,0(sp)
740  0xffa30008, // 0x08: sd v1,8(sp)
741  0xffa40010, // 0x0c: sd a0,16(sp)
742  0xffa50018, // 0x10: sd a1,24(sp)
743  0xffa60020, // 0x14: sd a2,32(sp)
744  0xffa70028, // 0x18: sd a3,40(sp)
745  0xffa80030, // 0x1c: sd a4,48(sp)
746  0xffa90038, // 0x20: sd a5,56(sp)
747  0xffaa0040, // 0x24: sd a6,64(sp)
748  0xffab0048, // 0x28: sd a7,72(sp)
749  0xffac0050, // 0x2c: sd t0,80(sp)
750  0xffad0058, // 0x30: sd t1,88(sp)
751  0xffae0060, // 0x34: sd t2,96(sp)
752  0xffaf0068, // 0x38: sd t3,104(sp)
753  0xffb00070, // 0x3c: sd s0,112(sp)
754  0xffb10078, // 0x40: sd s1,120(sp)
755  0xffb20080, // 0x44: sd s2,128(sp)
756  0xffb30088, // 0x48: sd s3,136(sp)
757  0xffb40090, // 0x4c: sd s4,144(sp)
758  0xffb50098, // 0x50: sd s5,152(sp)
759  0xffb600a0, // 0x54: sd s6,160(sp)
760  0xffb700a8, // 0x58: sd s7,168(sp)
761  0xffb800b0, // 0x5c: sd t8,176(sp)
762  0xffb900b8, // 0x60: sd t9,184(sp)
763  0xffbe00c0, // 0x64: sd fp,192(sp)
764  0xffbf00c8, // 0x68: sd ra,200(sp)
765 
766  // Callback manager addr.
767  0x00000000, // 0x6c: lui $a0,heighest(callbackmgr)
768  0x00000000, // 0x70: daddiu $a0,$a0,heigher(callbackmgr)
769  0x00000000, // 0x74: dsll $a0,$a0,16
770  0x00000000, // 0x78: daddiu $a0,$a0,hi(callbackmgr)
771  0x00000000, // 0x7c: dsll $a0,$a0,16
772  0x00000000, // 0x80: daddiu $a0,$a0,lo(callbackmgr)
773 
774  0x03e02825, // 0x84: move $a1, $ra
775  0x64a5ffdc, // 0x88: daddiu $a1,$a1,-36
776 
777  // JIT re-entry fn addr:
778  0x00000000, // 0x8c: lui $t9,reentry
779  0x00000000, // 0x90: daddiu $t9,$t9,reentry
780  0x00000000, // 0x94: dsll $t9,$t9,
781  0x00000000, // 0x98: daddiu $t9,$t9,
782  0x00000000, // 0x9c: dsll $t9,$t9,
783  0x00000000, // 0xa0: daddiu $t9,$t9,
784  0x0320f809, // 0xa4: jalr $t9
785  0x00000000, // 0xa8: nop
786  0xdfbf00c8, // 0xac: ld ra, 200(sp)
787  0xdfbe00c0, // 0xb0: ld fp, 192(sp)
788  0xdfb900b8, // 0xb4: ld t9, 184(sp)
789  0xdfb800b0, // 0xb8: ld t8, 176(sp)
790  0xdfb700a8, // 0xbc: ld s7, 168(sp)
791  0xdfb600a0, // 0xc0: ld s6, 160(sp)
792  0xdfb50098, // 0xc4: ld s5, 152(sp)
793  0xdfb40090, // 0xc8: ld s4, 144(sp)
794  0xdfb30088, // 0xcc: ld s3, 136(sp)
795  0xdfb20080, // 0xd0: ld s2, 128(sp)
796  0xdfb10078, // 0xd4: ld s1, 120(sp)
797  0xdfb00070, // 0xd8: ld s0, 112(sp)
798  0xdfaf0068, // 0xdc: ld t3, 104(sp)
799  0xdfae0060, // 0xe0: ld t2, 96(sp)
800  0xdfad0058, // 0xe4: ld t1, 88(sp)
801  0xdfac0050, // 0xe8: ld t0, 80(sp)
802  0xdfab0048, // 0xec: ld a7, 72(sp)
803  0xdfaa0040, // 0xf0: ld a6, 64(sp)
804  0xdfa90038, // 0xf4: ld a5, 56(sp)
805  0xdfa80030, // 0xf8: ld a4, 48(sp)
806  0xdfa70028, // 0xfc: ld a3, 40(sp)
807  0xdfa60020, // 0x100: ld a2, 32(sp)
808  0xdfa50018, // 0x104: ld a1, 24(sp)
809  0xdfa40010, // 0x108: ld a0, 16(sp)
810  0xdfa30008, // 0x10c: ld v1, 8(sp)
811  0x67bd00d0, // 0x110: daddiu $sp,$sp,208
812  0x0300f825, // 0x114: move $ra, $t8
813  0x03200008, // 0x118: jr $t9
814  0x0040c825, // 0x11c: move $t9, $v0
815  };
816 
817  const unsigned ReentryFnAddrOffset = 0x8c; // JIT re-entry fn addr lui
818  const unsigned CallbackMgrAddrOffset = 0x6c; // Callback manager addr lui
819 
820  memcpy(ResolverMem, ResolverCode, sizeof(ResolverCode));
821 
822  uint64_t CallMgrAddr = reinterpret_cast<uint64_t>(CallbackMgr);
823 
824  uint32_t CallMgrLUi =
825  0x3c040000 | (((CallMgrAddr + 0x800080008000) >> 48) & 0xFFFF);
826  uint32_t CallMgrDADDiu =
827  0x64840000 | (((CallMgrAddr + 0x80008000) >> 32) & 0xFFFF);
828  uint32_t CallMgrDSLL = 0x00042438;
829  uint32_t CallMgrDADDiu2 =
830  0x64840000 | ((((CallMgrAddr + 0x8000) >> 16) & 0xFFFF));
831  uint32_t CallMgrDSLL2 = 0x00042438;
832  uint32_t CallMgrDADDiu3 = 0x64840000 | ((CallMgrAddr)&0xFFFF);
833 
834  memcpy(ResolverMem + CallbackMgrAddrOffset, &CallMgrLUi, sizeof(CallMgrLUi));
835  memcpy(ResolverMem + (CallbackMgrAddrOffset + 4), &CallMgrDADDiu,
836  sizeof(CallMgrDADDiu));
837  memcpy(ResolverMem + (CallbackMgrAddrOffset + 8), &CallMgrDSLL,
838  sizeof(CallMgrDSLL));
839  memcpy(ResolverMem + (CallbackMgrAddrOffset + 12), &CallMgrDADDiu2,
840  sizeof(CallMgrDADDiu2));
841  memcpy(ResolverMem + (CallbackMgrAddrOffset + 16), &CallMgrDSLL2,
842  sizeof(CallMgrDSLL2));
843  memcpy(ResolverMem + (CallbackMgrAddrOffset + 20), &CallMgrDADDiu3,
844  sizeof(CallMgrDADDiu3));
845 
846  uint64_t ReentryAddr = reinterpret_cast<uint64_t>(ReentryFn);
847 
848  uint32_t ReentryLUi =
849  0x3c190000 | (((ReentryAddr + 0x800080008000) >> 48) & 0xFFFF);
850 
851  uint32_t ReentryDADDiu =
852  0x67390000 | (((ReentryAddr + 0x80008000) >> 32) & 0xFFFF);
853 
854  uint32_t ReentryDSLL = 0x0019cc38;
855 
856  uint32_t ReentryDADDiu2 =
857  0x67390000 | (((ReentryAddr + 0x8000) >> 16) & 0xFFFF);
858 
859  uint32_t ReentryDSLL2 = 0x0019cc38;
860 
861  uint32_t ReentryDADDiu3 = 0x67390000 | ((ReentryAddr)&0xFFFF);
862 
863  memcpy(ResolverMem + ReentryFnAddrOffset, &ReentryLUi, sizeof(ReentryLUi));
864  memcpy(ResolverMem + (ReentryFnAddrOffset + 4), &ReentryDADDiu,
865  sizeof(ReentryDADDiu));
866  memcpy(ResolverMem + (ReentryFnAddrOffset + 8), &ReentryDSLL,
867  sizeof(ReentryDSLL));
868  memcpy(ResolverMem + (ReentryFnAddrOffset + 12), &ReentryDADDiu2,
869  sizeof(ReentryDADDiu2));
870  memcpy(ResolverMem + (ReentryFnAddrOffset + 16), &ReentryDSLL2,
871  sizeof(ReentryDSLL2));
872  memcpy(ResolverMem + (ReentryFnAddrOffset + 20), &ReentryDADDiu3,
873  sizeof(ReentryDADDiu3));
874 }
875 
876 void OrcMips64::writeTrampolines(uint8_t *TrampolineMem, void *ResolverAddr,
877  unsigned NumTrampolines) {
878 
879  uint32_t *Trampolines = reinterpret_cast<uint32_t *>(TrampolineMem);
880  uint64_t ResolveAddr = reinterpret_cast<uint64_t>(ResolverAddr);
881 
882  uint64_t HeighestAddr = ((ResolveAddr + 0x800080008000) >> 48);
883  uint64_t HeigherAddr = ((ResolveAddr + 0x80008000) >> 32);
884  uint64_t HiAddr = ((ResolveAddr + 0x8000) >> 16);
885 
886  for (unsigned I = 0; I < NumTrampolines; ++I) {
887  Trampolines[10 * I + 0] = 0x03e0c025; // move $t8,$ra
888  Trampolines[10 * I + 1] = 0x3c190000 | (HeighestAddr & 0xFFFF); // lui $t9,resolveAddr
889  Trampolines[10 * I + 2] = 0x67390000 | (HeigherAddr & 0xFFFF); // daddiu $t9,$t9,%higher(resolveAddr)
890  Trampolines[10 * I + 3] = 0x0019cc38; // dsll $t9,$t9,16
891  Trampolines[10 * I + 4] = 0x67390000 | (HiAddr & 0xFFFF); // daddiu $t9,$t9,%hi(ptr)
892  Trampolines[10 * I + 5] = 0x0019cc38; // dsll $t9,$t9,16
893  Trampolines[10 * I + 6] = 0x67390000 | (ResolveAddr & 0xFFFF); // daddiu $t9,$t9,%lo(ptr)
894  Trampolines[10 * I + 7] = 0x0320f809; // jalr $t9
895  Trampolines[10 * I + 8] = 0x00000000; // nop
896  Trampolines[10 * I + 9] = 0x00000000; // nop
897  }
898 }
899 
900 Error OrcMips64::emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo,
901  unsigned MinStubs,
902  void *InitialPtrVal) {
903  // Stub format is:
904  //
905  // .section __orc_stubs
906  // stub1:
907  // lui $t9,ptr1
908  // dsll $t9,$t9,16
909  // daddiu $t9,$t9,%hi(ptr)
910  // dsll $t9,$t9,16
911  // ld $t9,%lo(ptr)
912  // jr $t9
913  // stub2:
914  // lui $t9,ptr1
915  // dsll $t9,$t9,16
916  // daddiu $t9,$t9,%hi(ptr)
917  // dsll $t9,$t9,16
918  // ld $t9,%lo(ptr)
919  // jr $t9
920  //
921  // ...
922  //
923  // .section __orc_ptrs
924  // ptr1:
925  // .dword 0x0
926  // ptr2:
927  // .dword 0x0
928  //
929  // ...
930  const unsigned StubSize = IndirectStubsInfo::StubSize;
931 
932  // Emit at least MinStubs, rounded up to fill the pages allocated.
933  unsigned PageSize = sys::Process::getPageSize();
934  unsigned NumPages = ((MinStubs * StubSize) + (PageSize - 1)) / PageSize;
935  unsigned NumStubs = (NumPages * PageSize) / StubSize;
936 
937  // Allocate memory for stubs and pointers in one call.
938  std::error_code EC;
939  auto StubsMem = sys::OwningMemoryBlock(sys::Memory::allocateMappedMemory(
940  2 * NumPages * PageSize, nullptr,
941  sys::Memory::MF_READ | sys::Memory::MF_WRITE, EC));
942 
943  if (EC)
944  return errorCodeToError(EC);
945 
946  // Create separate MemoryBlocks representing the stubs and pointers.
947  sys::MemoryBlock StubsBlock(StubsMem.base(), NumPages * PageSize);
948  sys::MemoryBlock PtrsBlock(static_cast<char *>(StubsMem.base()) +
949  NumPages * PageSize,
950  NumPages * PageSize);
951 
952  // Populate the stubs page stubs and mark it executable.
953  uint32_t *Stub = reinterpret_cast<uint32_t *>(StubsBlock.base());
954  uint64_t PtrAddr = reinterpret_cast<uint64_t>(PtrsBlock.base());
955 
956  for (unsigned I = 0; I < NumStubs; ++I, PtrAddr += 8) {
957  uint64_t HeighestAddr = ((PtrAddr + 0x800080008000) >> 48);
958  uint64_t HeigherAddr = ((PtrAddr + 0x80008000) >> 32);
959  uint64_t HiAddr = ((PtrAddr + 0x8000) >> 16);
960  Stub[8 * I + 0] = 0x3c190000 | (HeighestAddr & 0xFFFF); // lui $t9,ptr1
961  Stub[8 * I + 1] = 0x67390000 | (HeigherAddr & 0xFFFF); // daddiu $t9,$t9,%higher(ptr)
962  Stub[8 * I + 2] = 0x0019cc38; // dsll $t9,$t9,16
963  Stub[8 * I + 3] = 0x67390000 | (HiAddr & 0xFFFF); // daddiu $t9,$t9,%hi(ptr)
964  Stub[8 * I + 4] = 0x0019cc38; // dsll $t9,$t9,16
965  Stub[8 * I + 5] = 0xdf390000 | (PtrAddr & 0xFFFF); // ld $t9,%lo(ptr)
966  Stub[8 * I + 6] = 0x03200008; // jr $t9
967  Stub[8 * I + 7] = 0x00000000; // nop
968  }
969 
970  if (auto EC = sys::Memory::protectMappedMemory(
971  StubsBlock, sys::Memory::MF_READ | sys::Memory::MF_EXEC))
972  return errorCodeToError(EC);
973 
974  // Initialize all pointers to point at FailureAddress.
975  void **Ptr = reinterpret_cast<void **>(PtrsBlock.base());
976  for (unsigned I = 0; I < NumStubs; ++I)
977  Ptr[I] = InitialPtrVal;
978 
979  StubsInfo = IndirectStubsInfo(NumStubs, std::move(StubsMem));
980 
981  return Error::success();
982 }
983 } // End namespace orc.
984 } // End namespace llvm.
llvm
This class represents lattice values for constants.
Definition: AllocatorList.h:24
llvm::orc::OrcMips32_Base::writeTrampolines
static void writeTrampolines(uint8_t *TrampolineMem, void *ResolverAddr, unsigned NumTrampolines)
Write the requsted number of trampolines into the given memory, which must be big enough to hold 1 po...
Definition: OrcABISupport.cpp:642
llvm::orc::OrcI386::writeResolverCode
static void writeResolverCode(uint8_t *ResolveMem, JITReentryFn Reentry, void *CallbackMgr)
Write the resolver code into the given memory.
Definition: OrcABISupport.cpp:416
llvm::orc::GenericIndirectStubsInfo::StubSize
static const unsigned StubSize
Definition: OrcABISupport.h:78
llvm::orc::GenericIndirectStubsInfo
Provide information about stub blocks generated by the makeIndirectStubsBlock function.
Definition: OrcABISupport.h:76
llvm::orc::OrcX86_64_SysV::JITReentryFn
JITTargetAddress(*)(void *CallbackMgr, void *TrampolineId) JITReentryFn
Definition: OrcABISupport.h:182
llvm::alignTo
uint64_t alignTo(uint64_t Value, uint64_t Align, uint64_t Skew=0)
Returns the next integer (mod 2**64) that is greater than or equal to Value and is a multiple of Alig...
Definition: MathExtras.h:685
llvm::orc::OrcAArch64::writeResolverCode
static void writeResolverCode(uint8_t *ResolveMem, JITReentryFn Reentry, void *CallbackMgr)
Write the resolver code into the given memory.
Definition: OrcABISupport.cpp:16
llvm::sys::Memory::allocateMappedMemory
static MemoryBlock allocateMappedMemory(size_t NumBytes, const MemoryBlock *const NearBlock, unsigned Flags, std::error_code &EC)
This method allocates a block of memory that is suitable for loading dynamically generated code (e...
llvm::orc::OrcI386::emitIndirectStubsBlock
static Error emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo, unsigned MinStubs, void *InitialPtrVal)
Emit at least MinStubs worth of indirect call stubs, rounded out to the nearest page size...
Definition: OrcABISupport.cpp:476
llvm::orc::OrcX86_64_Win32::writeResolverCode
static void writeResolverCode(uint8_t *ResolveMem, JITReentryFn Reentry, void *CallbackMgr)
Write the resolver code into the given memory.
Definition: OrcABISupport.cpp:340
llvm::orc::OrcMips64::writeResolverCode
static void writeResolverCode(uint8_t *ResolveMem, JITReentryFn Reentry, void *CallbackMgr)
Write the resolver code into the given memory.
Definition: OrcABISupport.cpp:733
llvm::orc::OrcMips32_Base::writeResolverCode
static void writeResolverCode(uint8_t *ResolveMem, JITReentryFn Reentry, void *CallbackMgr, bool isBigEndian)
Write the resolver code into the given memory.
Definition: OrcABISupport.cpp:540
llvm::orc::OrcMips64::writeTrampolines
static void writeTrampolines(uint8_t *TrampolineMem, void *ResolverAddr, unsigned NumTrampolines)
Write the requsted number of trampolines into the given memory, which must be big enough to hold 1 po...
Definition: OrcABISupport.cpp:876
llvm::orc::OrcMips64::JITReentryFn
JITTargetAddress(*)(void *CallbackMgr, void *TrampolineId) JITReentryFn
Definition: OrcABISupport.h:294
llvm::orc::OrcAArch64::emitIndirectStubsBlock
static Error emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo, unsigned MinStubs, void *InitialPtrVal)
Emit at least MinStubs worth of indirect call stubs, rounded out to the nearest page size...
Definition: OrcABISupport.cpp:125
llvm::errorCodeToError
Error errorCodeToError(std::error_code EC)
Helper for converting an std::error_code to a Error.
Definition: Error.cpp:88
llvm::Resolver
Interface for looking up the initializer for a variable name, used by Init::resolveReferences.
Definition: Record.h:1774
llvm::orc::OrcAArch64::TrampolineSize
static const unsigned TrampolineSize
Definition: OrcABISupport.h:119
llvm::orc::OrcX86_64_Win32::JITReentryFn
JITTargetAddress(*)(void *CallbackMgr, void *TrampolineId) JITReentryFn
Definition: OrcABISupport.h:198
llvm::orc::OrcAArch64::JITReentryFn
JITTargetAddress(*)(void *CallbackMgr, void *TrampolineId) JITReentryFn
Definition: OrcABISupport.h:125
llvm::sys::Process::getPageSize
static unsigned getPageSize()
llvm::orc::OrcAArch64::IndirectStubsInfo
GenericIndirectStubsInfo< 8 > IndirectStubsInfo
Definition: OrcABISupport.h:122
uint32_t
llvm::Error::success
static ErrorSuccess success()
Create a success value.
Definition: Error.h:327
llvm::orc::OrcX86_64_Base::writeTrampolines
static void writeTrampolines(uint8_t *TrampolineMem, void *ResolverAddr, unsigned NumTrampolines)
Write the requsted number of trampolines into the given memory, which must be big enough to hold 1 po...
Definition: OrcABISupport.cpp:192
llvm::sys::MemoryBlock
This class encapsulates the notion of a memory block which has an address and a size.
Definition: Memory.h:29
llvm::orc::OrcI386::JITReentryFn
JITTargetAddress(*)(void *CallbackMgr, void *TrampolineId) JITReentryFn
Definition: OrcABISupport.h:218
llvm::sys::OwningMemoryBlock
Owning version of MemoryBlock.
Definition: Memory.h:119
llvm::orc::OrcX86_64_SysV::writeResolverCode
static void writeResolverCode(uint8_t *ResolveMem, JITReentryFn Reentry, void *CallbackMgr)
Write the resolver code into the given memory.
Definition: OrcABISupport.cpp:273
llvm::orc::OrcMips64::emitIndirectStubsBlock
static Error emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo, unsigned MinStubs, void *InitialPtrVal)
Emit at least MinStubs worth of indirect call stubs, rounded out to the nearest page size...
Definition: OrcABISupport.cpp:900
llvm::orc::OrcAArch64::writeTrampolines
static void writeTrampolines(uint8_t *TrampolineMem, void *ResolverAddr, unsigned NumTrampolines)
Write the requsted number of trampolines into the given memory, which must be big enough to hold 1 po...
Definition: OrcABISupport.cpp:104
llvm::orc::OrcMips32_Base::JITReentryFn
JITTargetAddress(*)(void *CallbackMgr, void *TrampolineId) JITReentryFn
Definition: OrcABISupport.h:252
Process.h
Provides a library for accessing information about this process and other processes on the operating ...
llvm::orc::OrcI386::writeTrampolines
static void writeTrampolines(uint8_t *TrampolineMem, void *ResolverAddr, unsigned NumTrampolines)
Write the requsted number of trampolines into the given memory, which must be big enough to hold 1 po...
Definition: OrcABISupport.cpp:463
I
#define I(x, y, z)
Definition: MD5.cpp:58
PageSize
static cl::opt< int > PageSize("imp-null-check-page-size", cl::desc("The page size of the target in bytes"), cl::init(4096), cl::Hidden)
llvm::Error
Lightweight error class with error context and mandatory checking.
Definition: Error.h:158
llvm::orc::OrcMips32_Base::emitIndirectStubsBlock
static Error emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo, unsigned MinStubs, void *InitialPtrVal)
Emit at least MinStubs worth of indirect call stubs, rounded out to the nearest page size...
Definition: OrcABISupport.cpp:659
llvm::orc::OrcX86_64_Base::emitIndirectStubsBlock
static Error emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo, unsigned MinStubs, void *InitialPtrVal)
Emit at least MinStubs worth of indirect call stubs, rounded out to the nearest page size...
Definition: OrcABISupport.cpp:207
llvm::sys::Memory::protectMappedMemory
static std::error_code protectMappedMemory(const MemoryBlock &Block, unsigned Flags)
This method sets the protection flags for a block of memory to the state specified by /p Flags...
Generated on Sun Dec 20 2020 13:55:13 for LLVM by   doxygen 1.8.13