1193323Sed//===-- ExternalFunctions.cpp - Implement External Functions --------------===// 2193323Sed// 3353358Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4353358Sdim// See https://llvm.org/LICENSE.txt for license information. 5353358Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6193323Sed// 7193323Sed//===----------------------------------------------------------------------===// 8193323Sed// 9193323Sed// This file contains both code to deal with invoking "external" functions, but 10193323Sed// also contains code that implements "exported" external functions. 11193323Sed// 12193323Sed// There are currently two mechanisms for handling external functions in the 13193323Sed// Interpreter. The first is to implement lle_* wrapper functions that are 14193323Sed// specific to well-known library functions which manually translate the 15193323Sed// arguments from GenericValues and make the call. If such a wrapper does 16193323Sed// not exist, and libffi is available, then the Interpreter will attempt to 17193323Sed// invoke the function using libffi, after finding its address. 18193323Sed// 19193323Sed//===----------------------------------------------------------------------===// 20193323Sed 21193323Sed#include "Interpreter.h" 22314564Sdim#include "llvm/ADT/APInt.h" 23314564Sdim#include "llvm/ADT/ArrayRef.h" 24321369Sdim#include "llvm/Config/config.h" // Detect libffi 25314564Sdim#include "llvm/ExecutionEngine/GenericValue.h" 26249423Sdim#include "llvm/IR/DataLayout.h" 27249423Sdim#include "llvm/IR/DerivedTypes.h" 28314564Sdim#include "llvm/IR/Function.h" 29314564Sdim#include "llvm/IR/Type.h" 30314564Sdim#include "llvm/Support/Casting.h" 31249423Sdim#include "llvm/Support/DynamicLibrary.h" 32198090Srdivacky#include "llvm/Support/ErrorHandling.h" 33193323Sed#include "llvm/Support/ManagedStatic.h" 34218893Sdim#include "llvm/Support/Mutex.h" 35314564Sdim#include "llvm/Support/raw_ostream.h" 36314564Sdim#include <cassert> 37249423Sdim#include <cmath> 38193323Sed#include <csignal> 39314564Sdim#include <cstdint> 40193323Sed#include <cstdio> 41249423Sdim#include <cstring> 42193323Sed#include <map> 43360784Sdim#include <mutex> 44314564Sdim#include <string> 45314564Sdim#include <utility> 46314564Sdim#include <vector> 47193323Sed 48193323Sed#ifdef HAVE_FFI_CALL 49193323Sed#ifdef HAVE_FFI_H 50193323Sed#include <ffi.h> 51193323Sed#define USE_LIBFFI 52193323Sed#elif HAVE_FFI_FFI_H 53193323Sed#include <ffi/ffi.h> 54193323Sed#define USE_LIBFFI 55193323Sed#endif 56193323Sed#endif 57193323Sed 58193323Sedusing namespace llvm; 59193323Sed 60194710Sedstatic ManagedStatic<sys::Mutex> FunctionsLock; 61194710Sed 62288943Sdimtypedef GenericValue (*ExFunc)(FunctionType *, ArrayRef<GenericValue>); 63193323Sedstatic ManagedStatic<std::map<const Function *, ExFunc> > ExportedFunctions; 64280031Sdimstatic ManagedStatic<std::map<std::string, ExFunc> > FuncNames; 65193323Sed 66193323Sed#ifdef USE_LIBFFI 67198090Srdivackytypedef void (*RawFunc)(); 68193323Sedstatic ManagedStatic<std::map<const Function *, RawFunc> > RawFunctions; 69193323Sed#endif 70193323Sed 71193323Sedstatic Interpreter *TheInterpreter; 72193323Sed 73226633Sdimstatic char getTypeID(Type *Ty) { 74193323Sed switch (Ty->getTypeID()) { 75193323Sed case Type::VoidTyID: return 'V'; 76193323Sed case Type::IntegerTyID: 77193323Sed switch (cast<IntegerType>(Ty)->getBitWidth()) { 78193323Sed case 1: return 'o'; 79193323Sed case 8: return 'B'; 80193323Sed case 16: return 'S'; 81193323Sed case 32: return 'I'; 82193323Sed case 64: return 'L'; 83193323Sed default: return 'N'; 84193323Sed } 85193323Sed case Type::FloatTyID: return 'F'; 86193323Sed case Type::DoubleTyID: return 'D'; 87193323Sed case Type::PointerTyID: return 'P'; 88193323Sed case Type::FunctionTyID:return 'M'; 89193323Sed case Type::StructTyID: return 'T'; 90193323Sed case Type::ArrayTyID: return 'A'; 91193323Sed default: return 'U'; 92193323Sed } 93193323Sed} 94193323Sed 95193323Sed// Try to find address of external function given a Function object. 96193323Sed// Please note, that interpreter doesn't know how to assemble a 97193323Sed// real call in general case (this is JIT job), that's why it assumes, 98193323Sed// that all external functions has the same (and pretty "general") signature. 99193323Sed// The typical example of such functions are "lle_X_" ones. 100193323Sedstatic ExFunc lookupFunction(const Function *F) { 101193323Sed // Function not found, look it up... start by figuring out what the 102193323Sed // composite function name should be. 103193323Sed std::string ExtName = "lle_"; 104226633Sdim FunctionType *FT = F->getFunctionType(); 105344779Sdim ExtName += getTypeID(FT->getReturnType()); 106344779Sdim for (Type *T : FT->params()) 107344779Sdim ExtName += getTypeID(T); 108288943Sdim ExtName += ("_" + F->getName()).str(); 109193323Sed 110198090Srdivacky sys::ScopedLock Writer(*FunctionsLock); 111280031Sdim ExFunc FnPtr = (*FuncNames)[ExtName]; 112276479Sdim if (!FnPtr) 113288943Sdim FnPtr = (*FuncNames)[("lle_X_" + F->getName()).str()]; 114276479Sdim if (!FnPtr) // Try calling a generic function... if it exists... 115288943Sdim FnPtr = (ExFunc)(intptr_t)sys::DynamicLibrary::SearchForAddressOfSymbol( 116288943Sdim ("lle_X_" + F->getName()).str()); 117276479Sdim if (FnPtr) 118193323Sed ExportedFunctions->insert(std::make_pair(F, FnPtr)); // Cache for later 119193323Sed return FnPtr; 120193323Sed} 121193323Sed 122193323Sed#ifdef USE_LIBFFI 123226633Sdimstatic ffi_type *ffiTypeFor(Type *Ty) { 124193323Sed switch (Ty->getTypeID()) { 125193323Sed case Type::VoidTyID: return &ffi_type_void; 126193323Sed case Type::IntegerTyID: 127193323Sed switch (cast<IntegerType>(Ty)->getBitWidth()) { 128193323Sed case 8: return &ffi_type_sint8; 129193323Sed case 16: return &ffi_type_sint16; 130193323Sed case 32: return &ffi_type_sint32; 131193323Sed case 64: return &ffi_type_sint64; 132193323Sed } 133193323Sed case Type::FloatTyID: return &ffi_type_float; 134193323Sed case Type::DoubleTyID: return &ffi_type_double; 135193323Sed case Type::PointerTyID: return &ffi_type_pointer; 136193323Sed default: break; 137193323Sed } 138193323Sed // TODO: Support other types such as StructTyID, ArrayTyID, OpaqueTyID, etc. 139207618Srdivacky report_fatal_error("Type could not be mapped for use with libffi."); 140193323Sed return NULL; 141193323Sed} 142193323Sed 143226633Sdimstatic void *ffiValueFor(Type *Ty, const GenericValue &AV, 144193323Sed void *ArgDataPtr) { 145193323Sed switch (Ty->getTypeID()) { 146193323Sed case Type::IntegerTyID: 147193323Sed switch (cast<IntegerType>(Ty)->getBitWidth()) { 148193323Sed case 8: { 149193323Sed int8_t *I8Ptr = (int8_t *) ArgDataPtr; 150193323Sed *I8Ptr = (int8_t) AV.IntVal.getZExtValue(); 151193323Sed return ArgDataPtr; 152193323Sed } 153193323Sed case 16: { 154193323Sed int16_t *I16Ptr = (int16_t *) ArgDataPtr; 155193323Sed *I16Ptr = (int16_t) AV.IntVal.getZExtValue(); 156193323Sed return ArgDataPtr; 157193323Sed } 158193323Sed case 32: { 159193323Sed int32_t *I32Ptr = (int32_t *) ArgDataPtr; 160193323Sed *I32Ptr = (int32_t) AV.IntVal.getZExtValue(); 161193323Sed return ArgDataPtr; 162193323Sed } 163193323Sed case 64: { 164193323Sed int64_t *I64Ptr = (int64_t *) ArgDataPtr; 165193323Sed *I64Ptr = (int64_t) AV.IntVal.getZExtValue(); 166193323Sed return ArgDataPtr; 167193323Sed } 168193323Sed } 169193323Sed case Type::FloatTyID: { 170193323Sed float *FloatPtr = (float *) ArgDataPtr; 171199481Srdivacky *FloatPtr = AV.FloatVal; 172193323Sed return ArgDataPtr; 173193323Sed } 174193323Sed case Type::DoubleTyID: { 175193323Sed double *DoublePtr = (double *) ArgDataPtr; 176193323Sed *DoublePtr = AV.DoubleVal; 177193323Sed return ArgDataPtr; 178193323Sed } 179193323Sed case Type::PointerTyID: { 180193323Sed void **PtrPtr = (void **) ArgDataPtr; 181193323Sed *PtrPtr = GVTOP(AV); 182193323Sed return ArgDataPtr; 183193323Sed } 184193323Sed default: break; 185193323Sed } 186193323Sed // TODO: Support other types such as StructTyID, ArrayTyID, OpaqueTyID, etc. 187207618Srdivacky report_fatal_error("Type value could not be mapped for use with libffi."); 188193323Sed return NULL; 189193323Sed} 190193323Sed 191288943Sdimstatic bool ffiInvoke(RawFunc Fn, Function *F, ArrayRef<GenericValue> ArgVals, 192296417Sdim const DataLayout &TD, GenericValue &Result) { 193193323Sed ffi_cif cif; 194226633Sdim FunctionType *FTy = F->getFunctionType(); 195193323Sed const unsigned NumArgs = F->arg_size(); 196193323Sed 197193323Sed // TODO: We don't have type information about the remaining arguments, because 198193323Sed // this information is never passed into ExecutionEngine::runFunction(). 199193323Sed if (ArgVals.size() > NumArgs && F->isVarArg()) { 200207618Srdivacky report_fatal_error("Calling external var arg function '" + F->getName() 201198090Srdivacky + "' is not supported by the Interpreter."); 202193323Sed } 203193323Sed 204193323Sed unsigned ArgBytes = 0; 205193323Sed 206193323Sed std::vector<ffi_type*> args(NumArgs); 207193323Sed for (Function::const_arg_iterator A = F->arg_begin(), E = F->arg_end(); 208193323Sed A != E; ++A) { 209193323Sed const unsigned ArgNo = A->getArgNo(); 210226633Sdim Type *ArgTy = FTy->getParamType(ArgNo); 211193323Sed args[ArgNo] = ffiTypeFor(ArgTy); 212296417Sdim ArgBytes += TD.getTypeStoreSize(ArgTy); 213193323Sed } 214193323Sed 215198090Srdivacky SmallVector<uint8_t, 128> ArgData; 216198090Srdivacky ArgData.resize(ArgBytes); 217198090Srdivacky uint8_t *ArgDataPtr = ArgData.data(); 218198090Srdivacky SmallVector<void*, 16> values(NumArgs); 219193323Sed for (Function::const_arg_iterator A = F->arg_begin(), E = F->arg_end(); 220193323Sed A != E; ++A) { 221193323Sed const unsigned ArgNo = A->getArgNo(); 222226633Sdim Type *ArgTy = FTy->getParamType(ArgNo); 223193323Sed values[ArgNo] = ffiValueFor(ArgTy, ArgVals[ArgNo], ArgDataPtr); 224296417Sdim ArgDataPtr += TD.getTypeStoreSize(ArgTy); 225193323Sed } 226193323Sed 227226633Sdim Type *RetTy = FTy->getReturnType(); 228193323Sed ffi_type *rtype = ffiTypeFor(RetTy); 229193323Sed 230344779Sdim if (ffi_prep_cif(&cif, FFI_DEFAULT_ABI, NumArgs, rtype, args.data()) == 231344779Sdim FFI_OK) { 232198090Srdivacky SmallVector<uint8_t, 128> ret; 233193323Sed if (RetTy->getTypeID() != Type::VoidTyID) 234296417Sdim ret.resize(TD.getTypeStoreSize(RetTy)); 235198090Srdivacky ffi_call(&cif, Fn, ret.data(), values.data()); 236193323Sed switch (RetTy->getTypeID()) { 237193323Sed case Type::IntegerTyID: 238193323Sed switch (cast<IntegerType>(RetTy)->getBitWidth()) { 239198090Srdivacky case 8: Result.IntVal = APInt(8 , *(int8_t *) ret.data()); break; 240198090Srdivacky case 16: Result.IntVal = APInt(16, *(int16_t*) ret.data()); break; 241198090Srdivacky case 32: Result.IntVal = APInt(32, *(int32_t*) ret.data()); break; 242198090Srdivacky case 64: Result.IntVal = APInt(64, *(int64_t*) ret.data()); break; 243193323Sed } 244193323Sed break; 245198090Srdivacky case Type::FloatTyID: Result.FloatVal = *(float *) ret.data(); break; 246198090Srdivacky case Type::DoubleTyID: Result.DoubleVal = *(double*) ret.data(); break; 247198090Srdivacky case Type::PointerTyID: Result.PointerVal = *(void **) ret.data(); break; 248193323Sed default: break; 249193323Sed } 250193323Sed return true; 251193323Sed } 252193323Sed 253193323Sed return false; 254193323Sed} 255193323Sed#endif // USE_LIBFFI 256193323Sed 257193323SedGenericValue Interpreter::callExternalFunction(Function *F, 258288943Sdim ArrayRef<GenericValue> ArgVals) { 259193323Sed TheInterpreter = this; 260193323Sed 261360784Sdim std::unique_lock<sys::Mutex> Guard(*FunctionsLock); 262194710Sed 263193323Sed // Do a lookup to see if the function is in our cache... this should just be a 264193323Sed // deferred annotation! 265193323Sed std::map<const Function *, ExFunc>::iterator FI = ExportedFunctions->find(F); 266193323Sed if (ExFunc Fn = (FI == ExportedFunctions->end()) ? lookupFunction(F) 267194710Sed : FI->second) { 268280031Sdim Guard.unlock(); 269193323Sed return Fn(F->getFunctionType(), ArgVals); 270194710Sed } 271193323Sed 272193323Sed#ifdef USE_LIBFFI 273193323Sed std::map<const Function *, RawFunc>::iterator RF = RawFunctions->find(F); 274193323Sed RawFunc RawFn; 275193323Sed if (RF == RawFunctions->end()) { 276193323Sed RawFn = (RawFunc)(intptr_t) 277193323Sed sys::DynamicLibrary::SearchForAddressOfSymbol(F->getName()); 278206083Srdivacky if (!RawFn) 279210299Sed RawFn = (RawFunc)(intptr_t)getPointerToGlobalIfAvailable(F); 280193323Sed if (RawFn != 0) 281193323Sed RawFunctions->insert(std::make_pair(F, RawFn)); // Cache for later 282193323Sed } else { 283193323Sed RawFn = RF->second; 284193323Sed } 285198090Srdivacky 286280031Sdim Guard.unlock(); 287193323Sed 288193323Sed GenericValue Result; 289243830Sdim if (RawFn != 0 && ffiInvoke(RawFn, F, ArgVals, getDataLayout(), Result)) 290193323Sed return Result; 291193323Sed#endif // USE_LIBFFI 292193323Sed 293198090Srdivacky if (F->getName() == "__main") 294198090Srdivacky errs() << "Tried to execute an unknown external function: " 295224145Sdim << *F->getType() << " __main\n"; 296198090Srdivacky else 297207618Srdivacky report_fatal_error("Tried to execute an unknown external function: " + 298224145Sdim F->getName()); 299199481Srdivacky#ifndef USE_LIBFFI 300199481Srdivacky errs() << "Recompiling LLVM with --enable-libffi might help.\n"; 301199481Srdivacky#endif 302193323Sed return GenericValue(); 303193323Sed} 304193323Sed 305193323Sed//===----------------------------------------------------------------------===// 306193323Sed// Functions "exported" to the running application... 307193323Sed// 308198090Srdivacky 309193323Sed// void atexit(Function*) 310288943Sdimstatic GenericValue lle_X_atexit(FunctionType *FT, 311288943Sdim ArrayRef<GenericValue> Args) { 312193323Sed assert(Args.size() == 1); 313193323Sed TheInterpreter->addAtExitHandler((Function*)GVTOP(Args[0])); 314193323Sed GenericValue GV; 315193323Sed GV.IntVal = 0; 316193323Sed return GV; 317193323Sed} 318193323Sed 319193323Sed// void exit(int) 320288943Sdimstatic GenericValue lle_X_exit(FunctionType *FT, ArrayRef<GenericValue> Args) { 321193323Sed TheInterpreter->exitCalled(Args[0]); 322193323Sed return GenericValue(); 323193323Sed} 324193323Sed 325193323Sed// void abort(void) 326288943Sdimstatic GenericValue lle_X_abort(FunctionType *FT, ArrayRef<GenericValue> Args) { 327198090Srdivacky //FIXME: should we report or raise here? 328207618Srdivacky //report_fatal_error("Interpreted program raised SIGABRT"); 329193323Sed raise (SIGABRT); 330193323Sed return GenericValue(); 331193323Sed} 332193323Sed 333193323Sed// int sprintf(char *, const char *, ...) - a very rough implementation to make 334193323Sed// output useful. 335288943Sdimstatic GenericValue lle_X_sprintf(FunctionType *FT, 336288943Sdim ArrayRef<GenericValue> Args) { 337193323Sed char *OutputBuffer = (char *)GVTOP(Args[0]); 338193323Sed const char *FmtStr = (const char *)GVTOP(Args[1]); 339193323Sed unsigned ArgNo = 2; 340193323Sed 341193323Sed // printf should return # chars printed. This is completely incorrect, but 342193323Sed // close enough for now. 343198090Srdivacky GenericValue GV; 344193323Sed GV.IntVal = APInt(32, strlen(FmtStr)); 345314564Sdim while (true) { 346193323Sed switch (*FmtStr) { 347193323Sed case 0: return GV; // Null terminator... 348193323Sed default: // Normal nonspecial character 349193323Sed sprintf(OutputBuffer++, "%c", *FmtStr++); 350193323Sed break; 351193323Sed case '\\': { // Handle escape codes 352193323Sed sprintf(OutputBuffer, "%c%c", *FmtStr, *(FmtStr+1)); 353193323Sed FmtStr += 2; OutputBuffer += 2; 354193323Sed break; 355193323Sed } 356193323Sed case '%': { // Handle format specifiers 357193323Sed char FmtBuf[100] = "", Buffer[1000] = ""; 358193323Sed char *FB = FmtBuf; 359193323Sed *FB++ = *FmtStr++; 360193323Sed char Last = *FB++ = *FmtStr++; 361193323Sed unsigned HowLong = 0; 362193323Sed while (Last != 'c' && Last != 'd' && Last != 'i' && Last != 'u' && 363193323Sed Last != 'o' && Last != 'x' && Last != 'X' && Last != 'e' && 364193323Sed Last != 'E' && Last != 'g' && Last != 'G' && Last != 'f' && 365193323Sed Last != 'p' && Last != 's' && Last != '%') { 366193323Sed if (Last == 'l' || Last == 'L') HowLong++; // Keep track of l's 367193323Sed Last = *FB++ = *FmtStr++; 368193323Sed } 369193323Sed *FB = 0; 370193323Sed 371193323Sed switch (Last) { 372193323Sed case '%': 373203954Srdivacky memcpy(Buffer, "%", 2); break; 374193323Sed case 'c': 375193323Sed sprintf(Buffer, FmtBuf, uint32_t(Args[ArgNo++].IntVal.getZExtValue())); 376193323Sed break; 377193323Sed case 'd': case 'i': 378193323Sed case 'u': case 'o': 379193323Sed case 'x': case 'X': 380193323Sed if (HowLong >= 1) { 381193323Sed if (HowLong == 1 && 382296417Sdim TheInterpreter->getDataLayout().getPointerSizeInBits() == 64 && 383193323Sed sizeof(long) < sizeof(int64_t)) { 384193323Sed // Make sure we use %lld with a 64 bit argument because we might be 385193323Sed // compiling LLI on a 32 bit compiler. 386193323Sed unsigned Size = strlen(FmtBuf); 387193323Sed FmtBuf[Size] = FmtBuf[Size-1]; 388193323Sed FmtBuf[Size+1] = 0; 389193323Sed FmtBuf[Size-1] = 'l'; 390193323Sed } 391193323Sed sprintf(Buffer, FmtBuf, Args[ArgNo++].IntVal.getZExtValue()); 392193323Sed } else 393193323Sed sprintf(Buffer, FmtBuf,uint32_t(Args[ArgNo++].IntVal.getZExtValue())); 394193323Sed break; 395193323Sed case 'e': case 'E': case 'g': case 'G': case 'f': 396193323Sed sprintf(Buffer, FmtBuf, Args[ArgNo++].DoubleVal); break; 397193323Sed case 'p': 398193323Sed sprintf(Buffer, FmtBuf, (void*)GVTOP(Args[ArgNo++])); break; 399193323Sed case 's': 400193323Sed sprintf(Buffer, FmtBuf, (char*)GVTOP(Args[ArgNo++])); break; 401198090Srdivacky default: 402198090Srdivacky errs() << "<unknown printf code '" << *FmtStr << "'!>"; 403193323Sed ArgNo++; break; 404193323Sed } 405203954Srdivacky size_t Len = strlen(Buffer); 406203954Srdivacky memcpy(OutputBuffer, Buffer, Len + 1); 407203954Srdivacky OutputBuffer += Len; 408193323Sed } 409193323Sed break; 410193323Sed } 411193323Sed } 412261991Sdim return GV; 413193323Sed} 414193323Sed 415193323Sed// int printf(const char *, ...) - a very rough implementation to make output 416193323Sed// useful. 417288943Sdimstatic GenericValue lle_X_printf(FunctionType *FT, 418288943Sdim ArrayRef<GenericValue> Args) { 419193323Sed char Buffer[10000]; 420193323Sed std::vector<GenericValue> NewArgs; 421193323Sed NewArgs.push_back(PTOGV((void*)&Buffer[0])); 422193323Sed NewArgs.insert(NewArgs.end(), Args.begin(), Args.end()); 423193323Sed GenericValue GV = lle_X_sprintf(FT, NewArgs); 424198090Srdivacky outs() << Buffer; 425193323Sed return GV; 426193323Sed} 427193323Sed 428193323Sed// int sscanf(const char *format, ...); 429288943Sdimstatic GenericValue lle_X_sscanf(FunctionType *FT, 430288943Sdim ArrayRef<GenericValue> args) { 431193323Sed assert(args.size() < 10 && "Only handle up to 10 args to sscanf right now!"); 432193323Sed 433193323Sed char *Args[10]; 434193323Sed for (unsigned i = 0; i < args.size(); ++i) 435193323Sed Args[i] = (char*)GVTOP(args[i]); 436193323Sed 437193323Sed GenericValue GV; 438193323Sed GV.IntVal = APInt(32, sscanf(Args[0], Args[1], Args[2], Args[3], Args[4], 439261991Sdim Args[5], Args[6], Args[7], Args[8], Args[9])); 440193323Sed return GV; 441193323Sed} 442193323Sed 443193323Sed// int scanf(const char *format, ...); 444288943Sdimstatic GenericValue lle_X_scanf(FunctionType *FT, ArrayRef<GenericValue> args) { 445193323Sed assert(args.size() < 10 && "Only handle up to 10 args to scanf right now!"); 446193323Sed 447193323Sed char *Args[10]; 448193323Sed for (unsigned i = 0; i < args.size(); ++i) 449193323Sed Args[i] = (char*)GVTOP(args[i]); 450193323Sed 451193323Sed GenericValue GV; 452193323Sed GV.IntVal = APInt(32, scanf( Args[0], Args[1], Args[2], Args[3], Args[4], 453261991Sdim Args[5], Args[6], Args[7], Args[8], Args[9])); 454193323Sed return GV; 455193323Sed} 456193323Sed 457193323Sed// int fprintf(FILE *, const char *, ...) - a very rough implementation to make 458193323Sed// output useful. 459288943Sdimstatic GenericValue lle_X_fprintf(FunctionType *FT, 460288943Sdim ArrayRef<GenericValue> Args) { 461193323Sed assert(Args.size() >= 2); 462193323Sed char Buffer[10000]; 463193323Sed std::vector<GenericValue> NewArgs; 464193323Sed NewArgs.push_back(PTOGV(Buffer)); 465193323Sed NewArgs.insert(NewArgs.end(), Args.begin()+1, Args.end()); 466193323Sed GenericValue GV = lle_X_sprintf(FT, NewArgs); 467193323Sed 468193323Sed fputs(Buffer, (FILE *) GVTOP(Args[0])); 469193323Sed return GV; 470193323Sed} 471193323Sed 472261991Sdimstatic GenericValue lle_X_memset(FunctionType *FT, 473288943Sdim ArrayRef<GenericValue> Args) { 474261991Sdim int val = (int)Args[1].IntVal.getSExtValue(); 475261991Sdim size_t len = (size_t)Args[2].IntVal.getZExtValue(); 476261991Sdim memset((void *)GVTOP(Args[0]), val, len); 477261991Sdim // llvm.memset.* returns void, lle_X_* returns GenericValue, 478261991Sdim // so here we return GenericValue with IntVal set to zero 479261991Sdim GenericValue GV; 480261991Sdim GV.IntVal = 0; 481261991Sdim return GV; 482261991Sdim} 483261991Sdim 484261991Sdimstatic GenericValue lle_X_memcpy(FunctionType *FT, 485288943Sdim ArrayRef<GenericValue> Args) { 486261991Sdim memcpy(GVTOP(Args[0]), GVTOP(Args[1]), 487261991Sdim (size_t)(Args[2].IntVal.getLimitedValue())); 488261991Sdim 489261991Sdim // llvm.memcpy* returns void, lle_X_* returns GenericValue, 490261991Sdim // so here we return GenericValue with IntVal set to zero 491261991Sdim GenericValue GV; 492261991Sdim GV.IntVal = 0; 493261991Sdim return GV; 494261991Sdim} 495261991Sdim 496193323Sedvoid Interpreter::initializeExternalFunctions() { 497198090Srdivacky sys::ScopedLock Writer(*FunctionsLock); 498280031Sdim (*FuncNames)["lle_X_atexit"] = lle_X_atexit; 499280031Sdim (*FuncNames)["lle_X_exit"] = lle_X_exit; 500280031Sdim (*FuncNames)["lle_X_abort"] = lle_X_abort; 501193323Sed 502280031Sdim (*FuncNames)["lle_X_printf"] = lle_X_printf; 503280031Sdim (*FuncNames)["lle_X_sprintf"] = lle_X_sprintf; 504280031Sdim (*FuncNames)["lle_X_sscanf"] = lle_X_sscanf; 505280031Sdim (*FuncNames)["lle_X_scanf"] = lle_X_scanf; 506280031Sdim (*FuncNames)["lle_X_fprintf"] = lle_X_fprintf; 507280031Sdim (*FuncNames)["lle_X_memset"] = lle_X_memset; 508280031Sdim (*FuncNames)["lle_X_memcpy"] = lle_X_memcpy; 509193323Sed} 510