#include "llvm/ADT/Triple.h"
-#include "llvm/ExecutionEngine/Orc/IndirectionUtils.h"
+#include "llvm/ExecutionEngine/Orc/OrcTargetSupport.h"
#include <array>
-using namespace llvm;
+using namespace llvm::orc;
namespace {
-const char *JITCallbackFuncName = "call_jit_for_lazy_compile";
-const char *JITCallbackIndexLabelPrefix = "jit_resolve_";
-
-std::array<const char *, 12> X86GPRsToSave = {{
- "rbp", "rbx", "r12", "r13", "r14", "r15", // Callee saved.
- "rdi", "rsi", "rdx", "rcx", "r8", "r9", // Int args.
-}};
+uint64_t executeCompileCallback(JITCompileCallbackManagerBase *JCBM,
+ TargetAddress CallbackID) {
+ return JCBM->executeCompileCallback(CallbackID);
+}
-std::array<const char *, 8> X86XMMsToSave = {{
- "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" // FP args
-}};
+}
-template <typename OStream> unsigned saveX86Regs(OStream &OS) {
- for (const auto &GPR : X86GPRsToSave)
- OS << " pushq %" << GPR << "\n";
+namespace llvm {
+namespace orc {
- OS << " subq $" << (16 * X86XMMsToSave.size()) << ", %rsp\n";
+const char* OrcX86_64::ResolverBlockName = "orc_resolver_block";
- for (unsigned i = 0; i < X86XMMsToSave.size(); ++i)
- OS << " movdqu %" << X86XMMsToSave[i] << ", "
- << (16 * (X86XMMsToSave.size() - i - 1)) << "(%rsp)\n";
+void OrcX86_64::insertResolverBlock(
+ Module &M, JITCompileCallbackManagerBase &JCBM) {
- return (8 * X86GPRsToSave.size()) + (16 * X86XMMsToSave.size());
-}
+ // Trampoline code-sequence length, used to get trampoline address from return
+ // address.
+ const unsigned X86_64_TrampolineLength = 6;
-template <typename OStream> void restoreX86Regs(OStream &OS) {
- for (unsigned i = 0; i < X86XMMsToSave.size(); ++i)
- OS << " movdqu " << (16 * i) << "(%rsp), %"
- << X86XMMsToSave[(X86XMMsToSave.size() - i - 1)] << "\n";
- OS << " addq $" << (16 * X86XMMsToSave.size()) << ", %rsp\n";
+ // 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"
+ }};
- for (unsigned i = 0; i < X86GPRsToSave.size(); ++i)
- OS << " popq %" << X86GPRsToSave[X86GPRsToSave.size() - i - 1] << "\n";
-}
-
-uint64_t call_jit_for_fn(JITResolveCallbackHandler *J, uint64_t FuncIdx) {
- return J->resolve(FuncIdx);
-}
-}
+ // Address of the executeCompileCallback function.
+ uint64_t CallbackAddr =
+ static_cast<uint64_t>(
+ reinterpret_cast<uintptr_t>(executeCompileCallback));
-namespace llvm {
+ std::ostringstream AsmStream;
+ Triple TT(M.getTargetTriple());
-std::string getJITResolveCallbackIndexLabel(unsigned I) {
- std::ostringstream LabelStream;
- LabelStream << JITCallbackIndexLabelPrefix << I;
- return LabelStream.str();
+ // 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());
}
-void insertX86CallbackAsm(Module &M, JITResolveCallbackHandler &J) {
- uint64_t CallbackAddr =
- static_cast<uint64_t>(reinterpret_cast<uintptr_t>(call_jit_for_fn));
+OrcX86_64::LabelNameFtor
+OrcX86_64::insertCompileCallbackTrampolines(Module &M,
+ TargetAddress ResolverBlockAddr,
+ unsigned NumCalls,
+ unsigned StartIndex) {
+ const char *ResolverBlockPtrName = "Lorc_resolve_block_addr";
- std::ostringstream JITCallbackAsm;
+ std::ostringstream AsmStream;
Triple TT(M.getTargetTriple());
if (TT.getOS() == Triple::Darwin)
- JITCallbackAsm << ".section __TEXT,__text,regular,pure_instructions\n"
- << ".align 4, 0x90\n";
+ AsmStream << ".section __TEXT,__text,regular,pure_instructions\n"
+ << ".align 4, 0x90\n";
else
- JITCallbackAsm << ".text\n"
- << ".align 16, 0x90\n";
-
- JITCallbackAsm << "jit_object_addr:\n"
- << " .quad " << &J << "\n" << JITCallbackFuncName << ":\n";
-
- uint64_t ReturnAddrOffset = saveX86Regs(JITCallbackAsm);
-
- // Compute index, load object address, and call JIT.
- JITCallbackAsm << " movq " << ReturnAddrOffset << "(%rsp), %rax\n"
- << " leaq (jit_indices_start+5)(%rip), %rbx\n"
- << " subq %rbx, %rax\n"
- << " xorq %rdx, %rdx\n"
- << " movq $5, %rbx\n"
- << " divq %rbx\n"
- << " movq %rax, %rsi\n"
- << " leaq jit_object_addr(%rip), %rdi\n"
- << " movq (%rdi), %rdi\n"
- << " movabsq $" << CallbackAddr << ", %rax\n"
- << " callq *%rax\n"
- << " movq %rax, " << ReturnAddrOffset << "(%rsp)\n";
-
- restoreX86Regs(JITCallbackAsm);
-
- JITCallbackAsm << " retq\n"
- << "jit_indices_start:\n";
-
- for (JITResolveCallbackHandler::StubIndex I = 0; I < J.getNumFuncs(); ++I)
- JITCallbackAsm << getJITResolveCallbackIndexLabel(I) << ":\n"
- << " callq " << JITCallbackFuncName << "\n";
-
- M.appendModuleInlineAsm(JITCallbackAsm.str());
-}
+ 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.
projects / oota-llvm.git / blobdiff