mirror of
https://github.com/c64scene-ar/llvm-6502.git
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c063d385fa
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1161 91177308-0d34-0410-b5e6-96231b3b80d8
320 lines
11 KiB
C++
320 lines
11 KiB
C++
//===-- ExternalMethods.cpp - Implement External Methods ------------------===//
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//
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// This file contains both code to deal with invoking "external" methods, but
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// also contains code that implements "exported" external methods.
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//
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// External methods in LLI are implemented by dlopen'ing the lli executable and
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// using dlsym to look op the methods that we want to invoke. If a method is
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// found, then the arguments are mangled and passed in to the function call.
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//
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//===----------------------------------------------------------------------===//
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#include "Interpreter.h"
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#include "llvm/DerivedTypes.h"
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#include <map>
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#include <dlfcn.h>
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#include <link.h>
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#include <math.h>
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#include <stdio.h>
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typedef GenericValue (*ExFunc)(MethodType *, const vector<GenericValue> &);
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static map<const Method *, ExFunc> Functions;
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static map<string, ExFunc> FuncNames;
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static Interpreter *TheInterpreter;
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// getCurrentExecutablePath() - Return the directory that the lli executable
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// lives in.
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//
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string Interpreter::getCurrentExecutablePath() const {
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Dl_info Info;
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if (dladdr(&TheInterpreter, &Info) == 0) return "";
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string LinkAddr(Info.dli_fname);
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unsigned SlashPos = LinkAddr.rfind('/');
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if (SlashPos != string::npos)
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LinkAddr.resize(SlashPos); // Trim the executable name off...
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return LinkAddr;
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}
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static char getTypeID(const Type *Ty) {
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switch (Ty->getPrimitiveID()) {
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case Type::VoidTyID: return 'V';
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case Type::BoolTyID: return 'o';
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case Type::UByteTyID: return 'B';
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case Type::SByteTyID: return 'b';
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case Type::UShortTyID: return 'S';
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case Type::ShortTyID: return 's';
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case Type::UIntTyID: return 'I';
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case Type::IntTyID: return 'i';
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case Type::ULongTyID: return 'L';
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case Type::LongTyID: return 'l';
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case Type::FloatTyID: return 'F';
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case Type::DoubleTyID: return 'D';
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case Type::PointerTyID: return 'P';
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case Type::MethodTyID: return 'M';
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case Type::StructTyID: return 'T';
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case Type::ArrayTyID: return 'A';
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case Type::OpaqueTyID: return 'O';
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default: return 'U';
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}
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}
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static ExFunc lookupMethod(const Method *M) {
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// Function not found, look it up... start by figuring out what the
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// composite function name should be.
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string ExtName = "lle_";
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const MethodType *MT = M->getMethodType();
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for (unsigned i = 0; const Type *Ty = MT->getContainedType(i); ++i)
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ExtName += getTypeID(Ty);
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ExtName += "_" + M->getName();
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//cout << "Tried: '" << ExtName << "'\n";
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ExFunc FnPtr = FuncNames[ExtName];
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if (FnPtr == 0)
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FnPtr = (ExFunc)dlsym(RTLD_DEFAULT, ExtName.c_str());
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if (FnPtr == 0)
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FnPtr = FuncNames["lle_X_"+M->getName()];
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if (FnPtr == 0) // Try calling a generic function... if it exists...
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FnPtr = (ExFunc)dlsym(RTLD_DEFAULT, ("lle_X_"+M->getName()).c_str());
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if (FnPtr != 0)
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Functions.insert(make_pair(M, FnPtr)); // Cache for later
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return FnPtr;
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}
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GenericValue Interpreter::callExternalMethod(Method *M,
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const vector<GenericValue> &ArgVals) {
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TheInterpreter = this;
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// Do a lookup to see if the method is in our cache... this should just be a
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// defered annotation!
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map<const Method *, ExFunc>::iterator FI = Functions.find(M);
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ExFunc Fn = (FI == Functions.end()) ? lookupMethod(M) : FI->second;
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if (Fn == 0) {
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cout << "Tried to execute an unknown external method: "
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<< M->getType()->getDescription() << " " << M->getName() << endl;
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return GenericValue();
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}
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// TODO: FIXME when types are not const!
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GenericValue Result = Fn(const_cast<MethodType*>(M->getMethodType()),ArgVals);
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return Result;
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}
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//===----------------------------------------------------------------------===//
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// Methods "exported" to the running application...
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//
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extern "C" { // Don't add C++ manglings to llvm mangling :)
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// Implement void printstr([ubyte {x N}] *)
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GenericValue lle_VP_printstr(MethodType *M, const vector<GenericValue> &ArgVal){
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assert(ArgVal.size() == 1 && "printstr only takes one argument!");
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cout << (char*)ArgVal[0].PointerVal;
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return GenericValue();
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}
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// Implement 'void print(X)' for every type...
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GenericValue lle_X_print(MethodType *M, const vector<GenericValue> &ArgVals) {
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assert(ArgVals.size() == 1 && "generic print only takes one argument!");
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Interpreter::print(M->getParamTypes()[0], ArgVals[0]);
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return GenericValue();
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}
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// Implement 'void printVal(X)' for every type...
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GenericValue lle_X_printVal(MethodType *M, const vector<GenericValue> &ArgVal) {
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assert(ArgVal.size() == 1 && "generic print only takes one argument!");
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// Specialize print([ubyte {x N} ] *) and print(sbyte *)
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if (PointerType *PTy = dyn_cast<PointerType>(M->getParamTypes()[0].get()))
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if (PTy->getValueType() == Type::SByteTy ||
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isa<ArrayType>(PTy->getValueType())) {
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return lle_VP_printstr(M, ArgVal);
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}
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Interpreter::printValue(M->getParamTypes()[0], ArgVal[0]);
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return GenericValue();
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}
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// Implement 'void printString(X)'
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// Argument must be [ubyte {x N} ] * or sbyte *
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GenericValue lle_X_printString(MethodType *M, const vector<GenericValue> &ArgVal) {
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assert(ArgVal.size() == 1 && "generic print only takes one argument!");
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return lle_VP_printstr(M, ArgVal);
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}
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// Implement 'void print<TYPE>(X)' for each primitive type or pointer type
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#define PRINT_TYPE_FUNC(TYPENAME,TYPEID) \
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GenericValue lle_X_print##TYPENAME(MethodType *M,\
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const vector<GenericValue> &ArgVal) {\
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assert(ArgVal.size() == 1 && "generic print only takes one argument!");\
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assert(M->getParamTypes()[0].get()->getPrimitiveID() == Type::##TYPEID);\
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Interpreter::printValue(M->getParamTypes()[0], ArgVal[0]);\
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return GenericValue();\
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}
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PRINT_TYPE_FUNC(SByte, SByteTyID)
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PRINT_TYPE_FUNC(UByte, UByteTyID)
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PRINT_TYPE_FUNC(Short, ShortTyID)
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PRINT_TYPE_FUNC(UShort, UShortTyID)
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PRINT_TYPE_FUNC(Int, IntTyID)
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PRINT_TYPE_FUNC(UInt, UIntTyID)
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PRINT_TYPE_FUNC(Long, LongTyID)
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PRINT_TYPE_FUNC(ULong, ULongTyID)
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PRINT_TYPE_FUNC(Float, FloatTyID)
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PRINT_TYPE_FUNC(Double, DoubleTyID)
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PRINT_TYPE_FUNC(Pointer, PointerTyID)
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// void "putchar"(sbyte)
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GenericValue lle_Vb_putchar(MethodType *M, const vector<GenericValue> &Args) {
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cout << Args[0].SByteVal;
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return GenericValue();
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}
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// int "putchar"(int)
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GenericValue lle_ii_putchar(MethodType *M, const vector<GenericValue> &Args) {
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cout << ((char)Args[0].IntVal) << flush;
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return Args[0];
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}
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// void "putchar"(ubyte)
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GenericValue lle_VB_putchar(MethodType *M, const vector<GenericValue> &Args) {
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cout << Args[0].SByteVal << flush;
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return Args[0];
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}
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// void "__main"()
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GenericValue lle_V___main(MethodType *M, const vector<GenericValue> &Args) {
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return GenericValue();
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}
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// void "exit"(int)
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GenericValue lle_X_exit(MethodType *M, const vector<GenericValue> &Args) {
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TheInterpreter->exitCalled(Args[0]);
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return GenericValue();
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}
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// void *malloc(uint)
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GenericValue lle_X_malloc(MethodType *M, const vector<GenericValue> &Args) {
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assert(Args.size() == 1 && "Malloc expects one argument!");
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GenericValue GV;
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GV.PointerVal = (uint64_t)malloc(Args[0].UIntVal);
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return GV;
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}
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// void free(void *)
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GenericValue lle_X_free(MethodType *M, const vector<GenericValue> &Args) {
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assert(Args.size() == 1);
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free((void*)Args[0].PointerVal);
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return GenericValue();
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}
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// double pow(double, double)
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GenericValue lle_X_pow(MethodType *M, const vector<GenericValue> &Args) {
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assert(Args.size() == 2);
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GenericValue GV;
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GV.DoubleVal = pow(Args[0].DoubleVal, Args[1].DoubleVal);
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return GV;
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}
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// double sqrt(double)
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GenericValue lle_X_sqrt(MethodType *M, const vector<GenericValue> &Args) {
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assert(Args.size() == 1);
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GenericValue GV;
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GV.DoubleVal = sqrt(Args[0].DoubleVal);
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return GV;
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}
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// int printf(sbyte *, ...) - a very rough implementation to make output useful.
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GenericValue lle_X_printf(MethodType *M, const vector<GenericValue> &Args) {
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const char *FmtStr = (const char *)Args[0].PointerVal;
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unsigned ArgNo = 1;
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// printf should return # chars printed. This is completely incorrect, but
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// close enough for now.
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GenericValue GV; GV.IntVal = strlen(FmtStr);
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while (1) {
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switch (*FmtStr) {
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case 0: return GV; // Null terminator...
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default: // Normal nonspecial character
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cout << *FmtStr++;
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break;
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case '\\': { // Handle escape codes
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char Buffer[3];
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Buffer[0] = *FmtStr++;
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Buffer[1] = *FmtStr++;
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Buffer[2] = 0;
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cout << Buffer;
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break;
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}
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case '%': { // Handle format specifiers
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bool isLong = false;
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++FmtStr;
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if (*FmtStr == 'l') {
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isLong = true;
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FmtStr++;
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}
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if (*FmtStr == '%')
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cout << *FmtStr; // %%
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else {
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char Fmt[] = "%d", Buffer[1000] = "";
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Fmt[1] = *FmtStr;
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switch (*FmtStr) {
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case 'c':
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sprintf(Buffer, Fmt, Args[ArgNo++].SByteVal); break;
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case 'd': case 'i':
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case 'u': case 'o':
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case 'x': case 'X':
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sprintf(Buffer, Fmt, Args[ArgNo++].IntVal); break;
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case 'e': case 'E': case 'g': case 'G': case 'f':
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sprintf(Buffer, Fmt, Args[ArgNo++].DoubleVal); break;
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case 's': cout << (char*)Args[ArgNo++].PointerVal; break; // %s
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default: cout << "<unknown printf code '" << *FmtStr << "'!>";
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ArgNo++; break;
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}
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cout << Buffer;
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}
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++FmtStr;
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break;
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}
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}
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}
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}
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} // End extern "C"
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void Interpreter::initializeExternalMethods() {
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FuncNames["lle_VP_printstr"] = lle_VP_printstr;
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FuncNames["lle_X_print"] = lle_X_print;
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FuncNames["lle_X_printVal"] = lle_X_printVal;
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FuncNames["lle_X_printString"] = lle_X_printString;
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FuncNames["lle_X_printUByte"] = lle_X_printUByte;
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FuncNames["lle_X_printSByte"] = lle_X_printSByte;
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FuncNames["lle_X_printUShort"] = lle_X_printUShort;
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FuncNames["lle_X_printShort"] = lle_X_printShort;
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FuncNames["lle_X_printInt"] = lle_X_printInt;
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FuncNames["lle_X_printUInt"] = lle_X_printUInt;
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FuncNames["lle_X_printLong"] = lle_X_printLong;
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FuncNames["lle_X_printULong"] = lle_X_printULong;
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FuncNames["lle_X_printFloat"] = lle_X_printFloat;
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FuncNames["lle_X_printDouble"] = lle_X_printDouble;
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FuncNames["lle_X_printPointer"] = lle_X_printPointer;
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FuncNames["lle_Vb_putchar"] = lle_Vb_putchar;
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FuncNames["lle_ii_putchar"] = lle_ii_putchar;
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FuncNames["lle_VB_putchar"] = lle_VB_putchar;
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FuncNames["lle_V___main"] = lle_V___main;
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FuncNames["lle_X_exit"] = lle_X_exit;
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FuncNames["lle_X_malloc"] = lle_X_malloc;
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FuncNames["lle_X_free"] = lle_X_free;
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FuncNames["lle_X_pow"] = lle_X_pow;
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FuncNames["lle_X_sqrt"] = lle_X_sqrt;
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FuncNames["lle_X_printf"] = lle_X_printf;
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}
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