+//===------- 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>
using namespace llvm::orc;
// Start the resolver function.
AsmStream << ResolverBlockName << ":\n"
- << " pushq %rbp\n"
- << " movq %rsp, %rbp\n";
+ << " pushq %rbp\n"
+ << " movq %rsp, %rbp\n";
// Store the GPRs.
for (const auto &GPR : GPRs)
- AsmStream << " pushq %" << GPR << "\n";
+ AsmStream << " pushq %" << GPR << "\n";
// Store floating-point state with FXSAVE.
// Note: We need to keep the stack 16-byte aligned, so if we've emitted an odd
// an extra 64 bits of padding to the FXSave area.
unsigned Padding = (GPRs.size() + 1) % 2 ? 8 : 0;
unsigned FXSaveSize = 512 + Padding;
- AsmStream << " subq $" << FXSaveSize << ", %rsp\n"
- << " fxsave (%rsp)\n"
+ AsmStream << " subq $" << FXSaveSize << ", %rsp\n"
+ << " fxsave64 (%rsp)\n"
// Load callback manager address, compute trampoline address, call JIT.
- << " lea jit_callback_manager_addr(%rip), %rdi\n"
- << " movq (%rdi), %rdi\n"
- << " movq 0x8(%rbp), %rsi\n"
- << " subq $" << X86_64_TrampolineLength << ", %rsi\n"
- << " movabsq $" << CallbackAddr << ", %rax\n"
- << " callq *%rax\n"
+ << " lea jit_callback_manager_addr(%rip), %rdi\n"
+ << " movq (%rdi), %rdi\n"
+ << " movq 0x8(%rbp), %rsi\n"
+ << " subq $" << X86_64_TrampolineLength << ", %rsi\n"
+ << " movabsq $" << CallbackAddr << ", %rax\n"
+ << " callq *%rax\n"
// Replace the return to the trampoline with the return address of the
// compiled function body.
- << " movq %rax, 0x8(%rbp)\n"
+ << " movq %rax, 0x8(%rbp)\n"
// Restore the floating point state.
- << " fxrstor (%rsp)\n"
- << " addq $" << FXSaveSize << ", %rsp\n";
+ << " fxrstor64 (%rsp)\n"
+ << " addq $" << FXSaveSize << ", %rsp\n";
for (const auto &GPR : make_range(GPRs.rbegin(), GPRs.rend()))
- AsmStream << " popq %" << GPR << "\n";
+ AsmStream << " popq %" << GPR << "\n";
// Restore original RBP and return to compiled function body.
- AsmStream << " popq %rbp\n"
+ AsmStream << " popq %rbp\n"
<< " retq\n";
M.appendModuleInlineAsm(AsmStream.str());
return GetLabelName;
}
+OrcX86_64::IndirectStubsInfo::IndirectStubsInfo(IndirectStubsInfo &&Other) {
+ StubsBlock = std::move(Other.StubsBlock);
+ PtrsBlock = std::move(Other.PtrsBlock);
+ Other.StubsBlock = sys::MemoryBlock();
+ Other.PtrsBlock = sys::MemoryBlock();
+}
+
+OrcX86_64::IndirectStubsInfo&
+OrcX86_64::IndirectStubsInfo::operator=(IndirectStubsInfo &&Other) {
+ StubsBlock = std::move(Other.StubsBlock);
+ PtrsBlock = std::move(Other.PtrsBlock);
+ Other.StubsBlock = sys::MemoryBlock();
+ Other.PtrsBlock = sys::MemoryBlock();
+ return *this;
+}
+
+OrcX86_64::IndirectStubsInfo::~IndirectStubsInfo() {
+ sys::Memory::releaseMappedMemory(StubsBlock);
+ sys::Memory::releaseMappedMemory(PtrsBlock);
+}
+
+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 InitialBlock = 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(InitialBlock.base(), NumPages * PageSize);
+ sys::MemoryBlock PtrsBlock(static_cast<char*>(InitialBlock.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.StubsBlock = std::move(StubsBlock);
+ StubsInfo.PtrsBlock = std::move(PtrsBlock);
+
+ return std::error_code();
+}
+
} // End namespace orc.
} // End namespace llvm.
projects / oota-llvm.git / blobdiff