diff options
Diffstat (limited to 'contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp')
| -rw-r--r-- | contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp b/contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp deleted file mode 100644 index b931f10..0000000 --- a/contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp +++ /dev/null @@ -1,171 +0,0 @@ -//===------- OrcTargetSupport.cpp - Target support utilities for Orc ------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "llvm/ADT/Triple.h" -#include "llvm/ExecutionEngine/Orc/OrcTargetSupport.h" -#include "llvm/Support/Process.h" -#include <array> - -namespace llvm { -namespace orc { - -void OrcX86_64::writeResolverCode(uint8_t *ResolverMem, JITReentryFn ReentryFn, - void *CallbackMgr) { - - const uint8_t ResolverCode[] = { - // resolver_entry: - 0x55, // 0x00: pushq %rbp - 0x48, 0x89, 0xe5, // 0x01: movq %rsp, %rbp - 0x50, // 0x04: pushq %rax - 0x53, // 0x05: pushq %rbx - 0x51, // 0x06: pushq %rcx - 0x52, // 0x07: pushq %rdx - 0x56, // 0x08: pushq %rsi - 0x57, // 0x09: pushq %rdi - 0x41, 0x50, // 0x0a: pushq %r8 - 0x41, 0x51, // 0x0c: pushq %r9 - 0x41, 0x52, // 0x0e: pushq %r10 - 0x41, 0x53, // 0x10: pushq %r11 - 0x41, 0x54, // 0x12: pushq %r12 - 0x41, 0x55, // 0x14: pushq %r13 - 0x41, 0x56, // 0x16: pushq %r14 - 0x41, 0x57, // 0x18: pushq %r15 - 0x48, 0x81, 0xec, 0x08, 0x02, 0x00, 0x00, // 0x1a: subq 20, %rsp - 0x48, 0x0f, 0xae, 0x04, 0x24, // 0x21: fxsave64 (%rsp) - 0x48, 0x8d, 0x3d, 0x43, 0x00, 0x00, 0x00, // 0x26: leaq 67(%rip), %rdi - 0x48, 0x8b, 0x3f, // 0x2d: movq (%rdi), %rdi - 0x48, 0x8b, 0x75, 0x08, // 0x30: movq 8(%rbp), %rsi - 0x48, 0x83, 0xee, 0x06, // 0x34: subq $6, %rsi - 0x48, 0xb8, // 0x38: movabsq $0, %rax - - // 0x3a: JIT re-entry fn addr: - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - - 0xff, 0xd0, // 0x42: callq *%rax - 0x48, 0x89, 0x45, 0x08, // 0x44: movq %rax, 8(%rbp) - 0x48, 0x0f, 0xae, 0x0c, 0x24, // 0x48: fxrstor64 (%rsp) - 0x48, 0x81, 0xc4, 0x08, 0x02, 0x00, 0x00, // 0x4d: addq 20, %rsp - 0x41, 0x5f, // 0x54: popq %r15 - 0x41, 0x5e, // 0x56: popq %r14 - 0x41, 0x5d, // 0x58: popq %r13 - 0x41, 0x5c, // 0x5a: popq %r12 - 0x41, 0x5b, // 0x5c: popq %r11 - 0x41, 0x5a, // 0x5e: popq %r10 - 0x41, 0x59, // 0x60: popq %r9 - 0x41, 0x58, // 0x62: popq %r8 - 0x5f, // 0x64: popq %rdi - 0x5e, // 0x65: popq %rsi - 0x5a, // 0x66: popq %rdx - 0x59, // 0x67: popq %rcx - 0x5b, // 0x68: popq %rbx - 0x58, // 0x69: popq %rax - 0x5d, // 0x6a: popq %rbp - 0xc3, // 0x6b: retq - 0x00, 0x00, 0x00, 0x00, // 0x6c: <padding> - - // 0x70: Callback mgr address. - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - }; - - const unsigned ReentryFnAddrOffset = 0x3a; - const unsigned CallbackMgrAddrOffset = 0x70; - - memcpy(ResolverMem, ResolverCode, sizeof(ResolverCode)); - memcpy(ResolverMem + ReentryFnAddrOffset, &ReentryFn, sizeof(ReentryFn)); - memcpy(ResolverMem + CallbackMgrAddrOffset, &CallbackMgr, - sizeof(CallbackMgr)); -} - -void OrcX86_64::writeTrampolines(uint8_t *TrampolineMem, void *ResolverAddr, - unsigned NumTrampolines) { - - unsigned OffsetToPtr = NumTrampolines * TrampolineSize; - - memcpy(TrampolineMem + OffsetToPtr, &ResolverAddr, sizeof(void*)); - - uint64_t *Trampolines = reinterpret_cast<uint64_t*>(TrampolineMem); - uint64_t CallIndirPCRel = 0xf1c40000000015ff; - - for (unsigned I = 0; I < NumTrampolines; ++I, OffsetToPtr -= TrampolineSize) - Trampolines[I] = CallIndirPCRel | ((OffsetToPtr - 6) << 16); -} - -std::error_code OrcX86_64::emitIndirectStubsBlock(IndirectStubsInfo &StubsInfo, - unsigned MinStubs, - void *InitialPtrVal) { - // Stub format is: - // - // .section __orc_stubs - // stub1: - // jmpq *ptr1(%rip) - // .byte 0xC4 ; <- Invalid opcode padding. - // .byte 0xF1 - // stub2: - // jmpq *ptr2(%rip) - // - // ... - // - // .section __orc_ptrs - // ptr1: - // .quad 0x0 - // ptr2: - // .quad 0x0 - // - // ... - - const unsigned StubSize = IndirectStubsInfo::StubSize; - - // Emit at least MinStubs, rounded up to fill the pages allocated. - unsigned PageSize = sys::Process::getPageSize(); - unsigned NumPages = ((MinStubs * StubSize) + (PageSize - 1)) / PageSize; - unsigned NumStubs = (NumPages * PageSize) / StubSize; - - // Allocate memory for stubs and pointers in one call. - std::error_code EC; - auto StubsMem = - sys::OwningMemoryBlock( - sys::Memory::allocateMappedMemory(2 * NumPages * PageSize, nullptr, - sys::Memory::MF_READ | - sys::Memory::MF_WRITE, - EC)); - - if (EC) - return EC; - - // Create separate MemoryBlocks representing the stubs and pointers. - sys::MemoryBlock StubsBlock(StubsMem.base(), NumPages * PageSize); - sys::MemoryBlock PtrsBlock(static_cast<char*>(StubsMem.base()) + - NumPages * PageSize, - NumPages * PageSize); - - // Populate the stubs page stubs and mark it executable. - uint64_t *Stub = reinterpret_cast<uint64_t*>(StubsBlock.base()); - uint64_t PtrOffsetField = - static_cast<uint64_t>(NumPages * PageSize - 6) << 16; - for (unsigned I = 0; I < NumStubs; ++I) - Stub[I] = 0xF1C40000000025ff | PtrOffsetField; - - if (auto EC = sys::Memory::protectMappedMemory(StubsBlock, - sys::Memory::MF_READ | - sys::Memory::MF_EXEC)) - return EC; - - // Initialize all pointers to point at FailureAddress. - void **Ptr = reinterpret_cast<void**>(PtrsBlock.base()); - for (unsigned I = 0; I < NumStubs; ++I) - Ptr[I] = InitialPtrVal; - - StubsInfo.NumStubs = NumStubs; - StubsInfo.StubsMem = std::move(StubsMem); - - return std::error_code(); -} - -} // End namespace orc. -} // End namespace llvm. |
