ExternalFunctions.cpp revision 226633
1193323Sed//===-- ExternalFunctions.cpp - Implement External Functions --------------===// 2193323Sed// 3193323Sed// The LLVM Compiler Infrastructure 4193323Sed// 5193323Sed// This file is distributed under the University of Illinois Open Source 6193323Sed// License. See LICENSE.TXT for details. 7193323Sed// 8193323Sed//===----------------------------------------------------------------------===// 9193323Sed// 10193323Sed// This file contains both code to deal with invoking "external" functions, but 11193323Sed// also contains code that implements "exported" external functions. 12193323Sed// 13193323Sed// There are currently two mechanisms for handling external functions in the 14193323Sed// Interpreter. The first is to implement lle_* wrapper functions that are 15193323Sed// specific to well-known library functions which manually translate the 16193323Sed// arguments from GenericValues and make the call. If such a wrapper does 17193323Sed// not exist, and libffi is available, then the Interpreter will attempt to 18193323Sed// invoke the function using libffi, after finding its address. 19193323Sed// 20193323Sed//===----------------------------------------------------------------------===// 21193323Sed 22193323Sed#include "Interpreter.h" 23193323Sed#include "llvm/DerivedTypes.h" 24193323Sed#include "llvm/Module.h" 25193323Sed#include "llvm/Config/config.h" // Detect libffi 26198090Srdivacky#include "llvm/Support/ErrorHandling.h" 27218893Sdim#include "llvm/Support/DynamicLibrary.h" 28193323Sed#include "llvm/Target/TargetData.h" 29193323Sed#include "llvm/Support/ManagedStatic.h" 30218893Sdim#include "llvm/Support/Mutex.h" 31193323Sed#include <csignal> 32193323Sed#include <cstdio> 33193323Sed#include <map> 34193323Sed#include <cmath> 35193323Sed#include <cstring> 36193323Sed 37193323Sed#ifdef HAVE_FFI_CALL 38193323Sed#ifdef HAVE_FFI_H 39193323Sed#include <ffi.h> 40193323Sed#define USE_LIBFFI 41193323Sed#elif HAVE_FFI_FFI_H 42193323Sed#include <ffi/ffi.h> 43193323Sed#define USE_LIBFFI 44193323Sed#endif 45193323Sed#endif 46193323Sed 47193323Sedusing namespace llvm; 48193323Sed 49194710Sedstatic ManagedStatic<sys::Mutex> FunctionsLock; 50194710Sed 51226633Sdimtypedef GenericValue (*ExFunc)(FunctionType *, 52193323Sed const std::vector<GenericValue> &); 53193323Sedstatic ManagedStatic<std::map<const Function *, ExFunc> > ExportedFunctions; 54193323Sedstatic std::map<std::string, ExFunc> FuncNames; 55193323Sed 56193323Sed#ifdef USE_LIBFFI 57198090Srdivackytypedef void (*RawFunc)(); 58193323Sedstatic ManagedStatic<std::map<const Function *, RawFunc> > RawFunctions; 59193323Sed#endif 60193323Sed 61193323Sedstatic Interpreter *TheInterpreter; 62193323Sed 63226633Sdimstatic char getTypeID(Type *Ty) { 64193323Sed switch (Ty->getTypeID()) { 65193323Sed case Type::VoidTyID: return 'V'; 66193323Sed case Type::IntegerTyID: 67193323Sed switch (cast<IntegerType>(Ty)->getBitWidth()) { 68193323Sed case 1: return 'o'; 69193323Sed case 8: return 'B'; 70193323Sed case 16: return 'S'; 71193323Sed case 32: return 'I'; 72193323Sed case 64: return 'L'; 73193323Sed default: return 'N'; 74193323Sed } 75193323Sed case Type::FloatTyID: return 'F'; 76193323Sed case Type::DoubleTyID: return 'D'; 77193323Sed case Type::PointerTyID: return 'P'; 78193323Sed case Type::FunctionTyID:return 'M'; 79193323Sed case Type::StructTyID: return 'T'; 80193323Sed case Type::ArrayTyID: return 'A'; 81193323Sed default: return 'U'; 82193323Sed } 83193323Sed} 84193323Sed 85193323Sed// Try to find address of external function given a Function object. 86193323Sed// Please note, that interpreter doesn't know how to assemble a 87193323Sed// real call in general case (this is JIT job), that's why it assumes, 88193323Sed// that all external functions has the same (and pretty "general") signature. 89193323Sed// The typical example of such functions are "lle_X_" ones. 90193323Sedstatic ExFunc lookupFunction(const Function *F) { 91193323Sed // Function not found, look it up... start by figuring out what the 92193323Sed // composite function name should be. 93193323Sed std::string ExtName = "lle_"; 94226633Sdim FunctionType *FT = F->getFunctionType(); 95193323Sed for (unsigned i = 0, e = FT->getNumContainedTypes(); i != e; ++i) 96193323Sed ExtName += getTypeID(FT->getContainedType(i)); 97198090Srdivacky ExtName + "_" + F->getNameStr(); 98193323Sed 99198090Srdivacky sys::ScopedLock Writer(*FunctionsLock); 100193323Sed ExFunc FnPtr = FuncNames[ExtName]; 101193323Sed if (FnPtr == 0) 102198090Srdivacky FnPtr = FuncNames["lle_X_" + F->getNameStr()]; 103193323Sed if (FnPtr == 0) // Try calling a generic function... if it exists... 104198090Srdivacky FnPtr = (ExFunc)(intptr_t) 105198090Srdivacky sys::DynamicLibrary::SearchForAddressOfSymbol("lle_X_"+F->getNameStr()); 106193323Sed if (FnPtr != 0) 107193323Sed ExportedFunctions->insert(std::make_pair(F, FnPtr)); // Cache for later 108193323Sed return FnPtr; 109193323Sed} 110193323Sed 111193323Sed#ifdef USE_LIBFFI 112226633Sdimstatic ffi_type *ffiTypeFor(Type *Ty) { 113193323Sed switch (Ty->getTypeID()) { 114193323Sed case Type::VoidTyID: return &ffi_type_void; 115193323Sed case Type::IntegerTyID: 116193323Sed switch (cast<IntegerType>(Ty)->getBitWidth()) { 117193323Sed case 8: return &ffi_type_sint8; 118193323Sed case 16: return &ffi_type_sint16; 119193323Sed case 32: return &ffi_type_sint32; 120193323Sed case 64: return &ffi_type_sint64; 121193323Sed } 122193323Sed case Type::FloatTyID: return &ffi_type_float; 123193323Sed case Type::DoubleTyID: return &ffi_type_double; 124193323Sed case Type::PointerTyID: return &ffi_type_pointer; 125193323Sed default: break; 126193323Sed } 127193323Sed // TODO: Support other types such as StructTyID, ArrayTyID, OpaqueTyID, etc. 128207618Srdivacky report_fatal_error("Type could not be mapped for use with libffi."); 129193323Sed return NULL; 130193323Sed} 131193323Sed 132226633Sdimstatic void *ffiValueFor(Type *Ty, const GenericValue &AV, 133193323Sed void *ArgDataPtr) { 134193323Sed switch (Ty->getTypeID()) { 135193323Sed case Type::IntegerTyID: 136193323Sed switch (cast<IntegerType>(Ty)->getBitWidth()) { 137193323Sed case 8: { 138193323Sed int8_t *I8Ptr = (int8_t *) ArgDataPtr; 139193323Sed *I8Ptr = (int8_t) AV.IntVal.getZExtValue(); 140193323Sed return ArgDataPtr; 141193323Sed } 142193323Sed case 16: { 143193323Sed int16_t *I16Ptr = (int16_t *) ArgDataPtr; 144193323Sed *I16Ptr = (int16_t) AV.IntVal.getZExtValue(); 145193323Sed return ArgDataPtr; 146193323Sed } 147193323Sed case 32: { 148193323Sed int32_t *I32Ptr = (int32_t *) ArgDataPtr; 149193323Sed *I32Ptr = (int32_t) AV.IntVal.getZExtValue(); 150193323Sed return ArgDataPtr; 151193323Sed } 152193323Sed case 64: { 153193323Sed int64_t *I64Ptr = (int64_t *) ArgDataPtr; 154193323Sed *I64Ptr = (int64_t) AV.IntVal.getZExtValue(); 155193323Sed return ArgDataPtr; 156193323Sed } 157193323Sed } 158193323Sed case Type::FloatTyID: { 159193323Sed float *FloatPtr = (float *) ArgDataPtr; 160199481Srdivacky *FloatPtr = AV.FloatVal; 161193323Sed return ArgDataPtr; 162193323Sed } 163193323Sed case Type::DoubleTyID: { 164193323Sed double *DoublePtr = (double *) ArgDataPtr; 165193323Sed *DoublePtr = AV.DoubleVal; 166193323Sed return ArgDataPtr; 167193323Sed } 168193323Sed case Type::PointerTyID: { 169193323Sed void **PtrPtr = (void **) ArgDataPtr; 170193323Sed *PtrPtr = GVTOP(AV); 171193323Sed return ArgDataPtr; 172193323Sed } 173193323Sed default: break; 174193323Sed } 175193323Sed // TODO: Support other types such as StructTyID, ArrayTyID, OpaqueTyID, etc. 176207618Srdivacky report_fatal_error("Type value could not be mapped for use with libffi."); 177193323Sed return NULL; 178193323Sed} 179193323Sed 180193323Sedstatic bool ffiInvoke(RawFunc Fn, Function *F, 181193323Sed const std::vector<GenericValue> &ArgVals, 182193323Sed const TargetData *TD, GenericValue &Result) { 183193323Sed ffi_cif cif; 184226633Sdim FunctionType *FTy = F->getFunctionType(); 185193323Sed const unsigned NumArgs = F->arg_size(); 186193323Sed 187193323Sed // TODO: We don't have type information about the remaining arguments, because 188193323Sed // this information is never passed into ExecutionEngine::runFunction(). 189193323Sed if (ArgVals.size() > NumArgs && F->isVarArg()) { 190207618Srdivacky report_fatal_error("Calling external var arg function '" + F->getName() 191198090Srdivacky + "' is not supported by the Interpreter."); 192193323Sed } 193193323Sed 194193323Sed unsigned ArgBytes = 0; 195193323Sed 196193323Sed std::vector<ffi_type*> args(NumArgs); 197193323Sed for (Function::const_arg_iterator A = F->arg_begin(), E = F->arg_end(); 198193323Sed A != E; ++A) { 199193323Sed const unsigned ArgNo = A->getArgNo(); 200226633Sdim Type *ArgTy = FTy->getParamType(ArgNo); 201193323Sed args[ArgNo] = ffiTypeFor(ArgTy); 202193323Sed ArgBytes += TD->getTypeStoreSize(ArgTy); 203193323Sed } 204193323Sed 205198090Srdivacky SmallVector<uint8_t, 128> ArgData; 206198090Srdivacky ArgData.resize(ArgBytes); 207198090Srdivacky uint8_t *ArgDataPtr = ArgData.data(); 208198090Srdivacky SmallVector<void*, 16> values(NumArgs); 209193323Sed for (Function::const_arg_iterator A = F->arg_begin(), E = F->arg_end(); 210193323Sed A != E; ++A) { 211193323Sed const unsigned ArgNo = A->getArgNo(); 212226633Sdim Type *ArgTy = FTy->getParamType(ArgNo); 213193323Sed values[ArgNo] = ffiValueFor(ArgTy, ArgVals[ArgNo], ArgDataPtr); 214193323Sed ArgDataPtr += TD->getTypeStoreSize(ArgTy); 215193323Sed } 216193323Sed 217226633Sdim Type *RetTy = FTy->getReturnType(); 218193323Sed ffi_type *rtype = ffiTypeFor(RetTy); 219193323Sed 220193323Sed if (ffi_prep_cif(&cif, FFI_DEFAULT_ABI, NumArgs, rtype, &args[0]) == FFI_OK) { 221198090Srdivacky SmallVector<uint8_t, 128> ret; 222193323Sed if (RetTy->getTypeID() != Type::VoidTyID) 223198090Srdivacky ret.resize(TD->getTypeStoreSize(RetTy)); 224198090Srdivacky ffi_call(&cif, Fn, ret.data(), values.data()); 225193323Sed switch (RetTy->getTypeID()) { 226193323Sed case Type::IntegerTyID: 227193323Sed switch (cast<IntegerType>(RetTy)->getBitWidth()) { 228198090Srdivacky case 8: Result.IntVal = APInt(8 , *(int8_t *) ret.data()); break; 229198090Srdivacky case 16: Result.IntVal = APInt(16, *(int16_t*) ret.data()); break; 230198090Srdivacky case 32: Result.IntVal = APInt(32, *(int32_t*) ret.data()); break; 231198090Srdivacky case 64: Result.IntVal = APInt(64, *(int64_t*) ret.data()); break; 232193323Sed } 233193323Sed break; 234198090Srdivacky case Type::FloatTyID: Result.FloatVal = *(float *) ret.data(); break; 235198090Srdivacky case Type::DoubleTyID: Result.DoubleVal = *(double*) ret.data(); break; 236198090Srdivacky case Type::PointerTyID: Result.PointerVal = *(void **) ret.data(); break; 237193323Sed default: break; 238193323Sed } 239193323Sed return true; 240193323Sed } 241193323Sed 242193323Sed return false; 243193323Sed} 244193323Sed#endif // USE_LIBFFI 245193323Sed 246193323SedGenericValue Interpreter::callExternalFunction(Function *F, 247193323Sed const std::vector<GenericValue> &ArgVals) { 248193323Sed TheInterpreter = this; 249193323Sed 250194710Sed FunctionsLock->acquire(); 251194710Sed 252193323Sed // Do a lookup to see if the function is in our cache... this should just be a 253193323Sed // deferred annotation! 254193323Sed std::map<const Function *, ExFunc>::iterator FI = ExportedFunctions->find(F); 255193323Sed if (ExFunc Fn = (FI == ExportedFunctions->end()) ? lookupFunction(F) 256194710Sed : FI->second) { 257194710Sed FunctionsLock->release(); 258193323Sed return Fn(F->getFunctionType(), ArgVals); 259194710Sed } 260193323Sed 261193323Sed#ifdef USE_LIBFFI 262193323Sed std::map<const Function *, RawFunc>::iterator RF = RawFunctions->find(F); 263193323Sed RawFunc RawFn; 264193323Sed if (RF == RawFunctions->end()) { 265193323Sed RawFn = (RawFunc)(intptr_t) 266193323Sed sys::DynamicLibrary::SearchForAddressOfSymbol(F->getName()); 267206083Srdivacky if (!RawFn) 268210299Sed RawFn = (RawFunc)(intptr_t)getPointerToGlobalIfAvailable(F); 269193323Sed if (RawFn != 0) 270193323Sed RawFunctions->insert(std::make_pair(F, RawFn)); // Cache for later 271193323Sed } else { 272193323Sed RawFn = RF->second; 273193323Sed } 274198090Srdivacky 275194710Sed FunctionsLock->release(); 276193323Sed 277193323Sed GenericValue Result; 278193323Sed if (RawFn != 0 && ffiInvoke(RawFn, F, ArgVals, getTargetData(), Result)) 279193323Sed return Result; 280193323Sed#endif // USE_LIBFFI 281193323Sed 282198090Srdivacky if (F->getName() == "__main") 283198090Srdivacky errs() << "Tried to execute an unknown external function: " 284224145Sdim << *F->getType() << " __main\n"; 285198090Srdivacky else 286207618Srdivacky report_fatal_error("Tried to execute an unknown external function: " + 287224145Sdim F->getName()); 288199481Srdivacky#ifndef USE_LIBFFI 289199481Srdivacky errs() << "Recompiling LLVM with --enable-libffi might help.\n"; 290199481Srdivacky#endif 291193323Sed return GenericValue(); 292193323Sed} 293193323Sed 294193323Sed 295193323Sed//===----------------------------------------------------------------------===// 296193323Sed// Functions "exported" to the running application... 297193323Sed// 298198090Srdivacky 299198090Srdivacky// Visual Studio warns about returning GenericValue in extern "C" linkage 300198090Srdivacky#ifdef _MSC_VER 301198090Srdivacky #pragma warning(disable : 4190) 302198090Srdivacky#endif 303198090Srdivacky 304193323Sedextern "C" { // Don't add C++ manglings to llvm mangling :) 305193323Sed 306193323Sed// void atexit(Function*) 307226633SdimGenericValue lle_X_atexit(FunctionType *FT, 308193323Sed const std::vector<GenericValue> &Args) { 309193323Sed assert(Args.size() == 1); 310193323Sed TheInterpreter->addAtExitHandler((Function*)GVTOP(Args[0])); 311193323Sed GenericValue GV; 312193323Sed GV.IntVal = 0; 313193323Sed return GV; 314193323Sed} 315193323Sed 316193323Sed// void exit(int) 317226633SdimGenericValue lle_X_exit(FunctionType *FT, 318193323Sed const std::vector<GenericValue> &Args) { 319193323Sed TheInterpreter->exitCalled(Args[0]); 320193323Sed return GenericValue(); 321193323Sed} 322193323Sed 323193323Sed// void abort(void) 324226633SdimGenericValue lle_X_abort(FunctionType *FT, 325193323Sed const std::vector<GenericValue> &Args) { 326198090Srdivacky //FIXME: should we report or raise here? 327207618Srdivacky //report_fatal_error("Interpreted program raised SIGABRT"); 328193323Sed raise (SIGABRT); 329193323Sed return GenericValue(); 330193323Sed} 331193323Sed 332193323Sed// int sprintf(char *, const char *, ...) - a very rough implementation to make 333193323Sed// output useful. 334226633SdimGenericValue lle_X_sprintf(FunctionType *FT, 335193323Sed const std::vector<GenericValue> &Args) { 336193323Sed char *OutputBuffer = (char *)GVTOP(Args[0]); 337193323Sed const char *FmtStr = (const char *)GVTOP(Args[1]); 338193323Sed unsigned ArgNo = 2; 339193323Sed 340193323Sed // printf should return # chars printed. This is completely incorrect, but 341193323Sed // close enough for now. 342198090Srdivacky GenericValue GV; 343193323Sed GV.IntVal = APInt(32, strlen(FmtStr)); 344193323Sed while (1) { 345193323Sed switch (*FmtStr) { 346193323Sed case 0: return GV; // Null terminator... 347193323Sed default: // Normal nonspecial character 348193323Sed sprintf(OutputBuffer++, "%c", *FmtStr++); 349193323Sed break; 350193323Sed case '\\': { // Handle escape codes 351193323Sed sprintf(OutputBuffer, "%c%c", *FmtStr, *(FmtStr+1)); 352193323Sed FmtStr += 2; OutputBuffer += 2; 353193323Sed break; 354193323Sed } 355193323Sed case '%': { // Handle format specifiers 356193323Sed char FmtBuf[100] = "", Buffer[1000] = ""; 357193323Sed char *FB = FmtBuf; 358193323Sed *FB++ = *FmtStr++; 359193323Sed char Last = *FB++ = *FmtStr++; 360193323Sed unsigned HowLong = 0; 361193323Sed while (Last != 'c' && Last != 'd' && Last != 'i' && Last != 'u' && 362193323Sed Last != 'o' && Last != 'x' && Last != 'X' && Last != 'e' && 363193323Sed Last != 'E' && Last != 'g' && Last != 'G' && Last != 'f' && 364193323Sed Last != 'p' && Last != 's' && Last != '%') { 365193323Sed if (Last == 'l' || Last == 'L') HowLong++; // Keep track of l's 366193323Sed Last = *FB++ = *FmtStr++; 367193323Sed } 368193323Sed *FB = 0; 369193323Sed 370193323Sed switch (Last) { 371193323Sed case '%': 372203954Srdivacky memcpy(Buffer, "%", 2); break; 373193323Sed case 'c': 374193323Sed sprintf(Buffer, FmtBuf, uint32_t(Args[ArgNo++].IntVal.getZExtValue())); 375193323Sed break; 376193323Sed case 'd': case 'i': 377193323Sed case 'u': case 'o': 378193323Sed case 'x': case 'X': 379193323Sed if (HowLong >= 1) { 380193323Sed if (HowLong == 1 && 381193323Sed TheInterpreter->getTargetData()->getPointerSizeInBits() == 64 && 382193323Sed sizeof(long) < sizeof(int64_t)) { 383193323Sed // Make sure we use %lld with a 64 bit argument because we might be 384193323Sed // compiling LLI on a 32 bit compiler. 385193323Sed unsigned Size = strlen(FmtBuf); 386193323Sed FmtBuf[Size] = FmtBuf[Size-1]; 387193323Sed FmtBuf[Size+1] = 0; 388193323Sed FmtBuf[Size-1] = 'l'; 389193323Sed } 390193323Sed sprintf(Buffer, FmtBuf, Args[ArgNo++].IntVal.getZExtValue()); 391193323Sed } else 392193323Sed sprintf(Buffer, FmtBuf,uint32_t(Args[ArgNo++].IntVal.getZExtValue())); 393193323Sed break; 394193323Sed case 'e': case 'E': case 'g': case 'G': case 'f': 395193323Sed sprintf(Buffer, FmtBuf, Args[ArgNo++].DoubleVal); break; 396193323Sed case 'p': 397193323Sed sprintf(Buffer, FmtBuf, (void*)GVTOP(Args[ArgNo++])); break; 398193323Sed case 's': 399193323Sed sprintf(Buffer, FmtBuf, (char*)GVTOP(Args[ArgNo++])); break; 400198090Srdivacky default: 401198090Srdivacky errs() << "<unknown printf code '" << *FmtStr << "'!>"; 402193323Sed ArgNo++; break; 403193323Sed } 404203954Srdivacky size_t Len = strlen(Buffer); 405203954Srdivacky memcpy(OutputBuffer, Buffer, Len + 1); 406203954Srdivacky OutputBuffer += Len; 407193323Sed } 408193323Sed break; 409193323Sed } 410193323Sed } 411193323Sed return GV; 412193323Sed} 413193323Sed 414193323Sed// int printf(const char *, ...) - a very rough implementation to make output 415193323Sed// useful. 416226633SdimGenericValue lle_X_printf(FunctionType *FT, 417193323Sed const std::vector<GenericValue> &Args) { 418193323Sed char Buffer[10000]; 419193323Sed std::vector<GenericValue> NewArgs; 420193323Sed NewArgs.push_back(PTOGV((void*)&Buffer[0])); 421193323Sed NewArgs.insert(NewArgs.end(), Args.begin(), Args.end()); 422193323Sed GenericValue GV = lle_X_sprintf(FT, NewArgs); 423198090Srdivacky outs() << Buffer; 424193323Sed return GV; 425193323Sed} 426193323Sed 427193323Sed// int sscanf(const char *format, ...); 428226633SdimGenericValue lle_X_sscanf(FunctionType *FT, 429193323Sed const std::vector<GenericValue> &args) { 430193323Sed assert(args.size() < 10 && "Only handle up to 10 args to sscanf right now!"); 431193323Sed 432193323Sed char *Args[10]; 433193323Sed for (unsigned i = 0; i < args.size(); ++i) 434193323Sed Args[i] = (char*)GVTOP(args[i]); 435193323Sed 436193323Sed GenericValue GV; 437193323Sed GV.IntVal = APInt(32, sscanf(Args[0], Args[1], Args[2], Args[3], Args[4], 438193323Sed Args[5], Args[6], Args[7], Args[8], Args[9])); 439193323Sed return GV; 440193323Sed} 441193323Sed 442193323Sed// int scanf(const char *format, ...); 443226633SdimGenericValue lle_X_scanf(FunctionType *FT, 444193323Sed const std::vector<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], 453193323Sed 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. 459226633SdimGenericValue lle_X_fprintf(FunctionType *FT, 460193323Sed const std::vector<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 472193323Sed} // End extern "C" 473193323Sed 474198090Srdivacky// Done with externals; turn the warning back on 475198090Srdivacky#ifdef _MSC_VER 476198090Srdivacky #pragma warning(default: 4190) 477198090Srdivacky#endif 478193323Sed 479198090Srdivacky 480193323Sedvoid Interpreter::initializeExternalFunctions() { 481198090Srdivacky sys::ScopedLock Writer(*FunctionsLock); 482193323Sed FuncNames["lle_X_atexit"] = lle_X_atexit; 483193323Sed FuncNames["lle_X_exit"] = lle_X_exit; 484193323Sed FuncNames["lle_X_abort"] = lle_X_abort; 485193323Sed 486193323Sed FuncNames["lle_X_printf"] = lle_X_printf; 487193323Sed FuncNames["lle_X_sprintf"] = lle_X_sprintf; 488193323Sed FuncNames["lle_X_sscanf"] = lle_X_sscanf; 489193323Sed FuncNames["lle_X_scanf"] = lle_X_scanf; 490193323Sed FuncNames["lle_X_fprintf"] = lle_X_fprintf; 491193323Sed} 492