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. 985