diff options
Diffstat (limited to 'contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp')
-rw-r--r-- | contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp b/contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp deleted file mode 100644 index 258868a..0000000 --- a/contrib/llvm/lib/ExecutionEngine/Orc/OrcTargetSupport.cpp +++ /dev/null @@ -1,138 +0,0 @@ -#include "llvm/ADT/Triple.h" -#include "llvm/ExecutionEngine/Orc/OrcTargetSupport.h" -#include <array> - -using namespace llvm::orc; - -namespace { - -uint64_t executeCompileCallback(JITCompileCallbackManagerBase *JCBM, - TargetAddress CallbackID) { - return JCBM->executeCompileCallback(CallbackID); -} - -} - -namespace llvm { -namespace orc { - -const char* OrcX86_64::ResolverBlockName = "orc_resolver_block"; - -void OrcX86_64::insertResolverBlock( - Module &M, JITCompileCallbackManagerBase &JCBM) { - - // Trampoline code-sequence length, used to get trampoline address from return - // address. - const unsigned X86_64_TrampolineLength = 6; - - // List of x86-64 GPRs to save. Note - RBP saved separately below. - std::array<const char *, 14> GPRs = {{ - "rax", "rbx", "rcx", "rdx", - "rsi", "rdi", "r8", "r9", - "r10", "r11", "r12", "r13", - "r14", "r15" - }}; - - // Address of the executeCompileCallback function. - uint64_t CallbackAddr = - static_cast<uint64_t>( - reinterpret_cast<uintptr_t>(executeCompileCallback)); - - std::ostringstream AsmStream; - Triple TT(M.getTargetTriple()); - - // Switch to text section. - if (TT.getOS() == Triple::Darwin) - AsmStream << ".section __TEXT,__text,regular,pure_instructions\n" - << ".align 4, 0x90\n"; - else - AsmStream << ".text\n" - << ".align 16, 0x90\n"; - - // Bake in a pointer to the callback manager immediately before the - // start of the resolver function. - AsmStream << "jit_callback_manager_addr:\n" - << " .quad " << &JCBM << "\n"; - - // Start the resolver function. - AsmStream << ResolverBlockName << ":\n" - << " pushq %rbp\n" - << " movq %rsp, %rbp\n"; - - // Store the GPRs. - for (const auto &GPR : GPRs) - 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 - // number of 64-bit pushes so far (GPRs.size() plus 1 for RBP) then add - // 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" - << " 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" - - // Replace the return to the trampoline with the return address of the - // compiled function body. - << " movq %rax, 0x8(%rbp)\n" - - // Restore the floating point state. - << " fxrstor64 (%rsp)\n" - << " addq $" << FXSaveSize << ", %rsp\n"; - - for (const auto &GPR : make_range(GPRs.rbegin(), GPRs.rend())) - AsmStream << " popq %" << GPR << "\n"; - - // Restore original RBP and return to compiled function body. - AsmStream << " popq %rbp\n" - << " retq\n"; - - M.appendModuleInlineAsm(AsmStream.str()); -} - -OrcX86_64::LabelNameFtor -OrcX86_64::insertCompileCallbackTrampolines(Module &M, - TargetAddress ResolverBlockAddr, - unsigned NumCalls, - unsigned StartIndex) { - const char *ResolverBlockPtrName = "Lorc_resolve_block_addr"; - - std::ostringstream AsmStream; - Triple TT(M.getTargetTriple()); - - if (TT.getOS() == Triple::Darwin) - AsmStream << ".section __TEXT,__text,regular,pure_instructions\n" - << ".align 4, 0x90\n"; - else - AsmStream << ".text\n" - << ".align 16, 0x90\n"; - - AsmStream << ResolverBlockPtrName << ":\n" - << " .quad " << ResolverBlockAddr << "\n"; - - auto GetLabelName = - [=](unsigned I) { - std::ostringstream LabelStream; - LabelStream << "orc_jcc_" << (StartIndex + I); - return LabelStream.str(); - }; - - for (unsigned I = 0; I < NumCalls; ++I) - AsmStream << GetLabelName(I) << ":\n" - << " callq *" << ResolverBlockPtrName << "(%rip)\n"; - - M.appendModuleInlineAsm(AsmStream.str()); - - return GetLabelName; -} - -} // End namespace orc. -} // End namespace llvm. |