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      1 /*===-- executionengine_ocaml.c - LLVM OCaml Glue ---------------*- C++ -*-===*\
      2 |*                                                                            *|
      3 |*                     The LLVM Compiler Infrastructure                       *|
      4 |*                                                                            *|
      5 |* This file is distributed under the University of Illinois Open Source      *|
      6 |* License. See LICENSE.TXT for details.                                      *|
      7 |*                                                                            *|
      8 |*===----------------------------------------------------------------------===*|
      9 |*                                                                            *|
     10 |* This file glues LLVM's OCaml interface to its C interface. These functions *|
     11 |* are by and large transparent wrappers to the corresponding C functions.    *|
     12 |*                                                                            *|
     13 |* Note that these functions intentionally take liberties with the CAMLparamX *|
     14 |* macros, since most of the parameters are not GC heap objects.              *|
     15 |*                                                                            *|
     16 \*===----------------------------------------------------------------------===*/
     17 
     18 #include <string.h>
     19 #include <assert.h>
     20 #include "llvm-c/ExecutionEngine.h"
     21 #include "llvm-c/Target.h"
     22 #include "caml/alloc.h"
     23 #include "caml/custom.h"
     24 #include "caml/fail.h"
     25 #include "caml/memory.h"
     26 #include "caml/callback.h"
     27 
     28 void llvm_raise(value Prototype, char *Message);
     29 
     30 /* unit -> bool */
     31 CAMLprim value llvm_ee_initialize(value Unit) {
     32   LLVMLinkInMCJIT();
     33 
     34   return Val_bool(!LLVMInitializeNativeTarget() &&
     35                   !LLVMInitializeNativeAsmParser() &&
     36                   !LLVMInitializeNativeAsmPrinter());
     37 }
     38 
     39 /* llmodule -> llcompileroption -> ExecutionEngine.t */
     40 CAMLprim LLVMExecutionEngineRef llvm_ee_create(value OptRecordOpt, LLVMModuleRef M) {
     41   value OptRecord;
     42   LLVMExecutionEngineRef MCJIT;
     43   char *Error;
     44   struct LLVMMCJITCompilerOptions Options;
     45 
     46   LLVMInitializeMCJITCompilerOptions(&Options, sizeof(Options));
     47   if (OptRecordOpt != Val_int(0)) {
     48     OptRecord = Field(OptRecordOpt, 0);
     49     Options.OptLevel = Int_val(Field(OptRecord, 0));
     50     Options.CodeModel = Int_val(Field(OptRecord, 1));
     51     Options.NoFramePointerElim = Int_val(Field(OptRecord, 2));
     52     Options.EnableFastISel = Int_val(Field(OptRecord, 3));
     53     Options.MCJMM = NULL;
     54   }
     55 
     56   if (LLVMCreateMCJITCompilerForModule(&MCJIT, M, &Options,
     57                                       sizeof(Options), &Error))
     58     llvm_raise(*caml_named_value("Llvm_executionengine.Error"), Error);
     59   return MCJIT;
     60 }
     61 
     62 /* ExecutionEngine.t -> unit */
     63 CAMLprim value llvm_ee_dispose(LLVMExecutionEngineRef EE) {
     64   LLVMDisposeExecutionEngine(EE);
     65   return Val_unit;
     66 }
     67 
     68 /* llmodule -> ExecutionEngine.t -> unit */
     69 CAMLprim value llvm_ee_add_module(LLVMModuleRef M, LLVMExecutionEngineRef EE) {
     70   LLVMAddModule(EE, M);
     71   return Val_unit;
     72 }
     73 
     74 /* llmodule -> ExecutionEngine.t -> llmodule */
     75 CAMLprim value llvm_ee_remove_module(LLVMModuleRef M, LLVMExecutionEngineRef EE) {
     76   LLVMModuleRef RemovedModule;
     77   char *Error;
     78   if (LLVMRemoveModule(EE, M, &RemovedModule, &Error))
     79     llvm_raise(*caml_named_value("Llvm_executionengine.Error"), Error);
     80   return Val_unit;
     81 }
     82 
     83 /* ExecutionEngine.t -> unit */
     84 CAMLprim value llvm_ee_run_static_ctors(LLVMExecutionEngineRef EE) {
     85   LLVMRunStaticConstructors(EE);
     86   return Val_unit;
     87 }
     88 
     89 /* ExecutionEngine.t -> unit */
     90 CAMLprim value llvm_ee_run_static_dtors(LLVMExecutionEngineRef EE) {
     91   LLVMRunStaticDestructors(EE);
     92   return Val_unit;
     93 }
     94 
     95 extern value llvm_alloc_data_layout(LLVMTargetDataRef TargetData);
     96 
     97 /* ExecutionEngine.t -> Llvm_target.DataLayout.t */
     98 CAMLprim value llvm_ee_get_data_layout(LLVMExecutionEngineRef EE) {
     99   value DataLayout;
    100   LLVMTargetDataRef OrigDataLayout;
    101   char* TargetDataCStr;
    102 
    103   OrigDataLayout = LLVMGetExecutionEngineTargetData(EE);
    104   TargetDataCStr = LLVMCopyStringRepOfTargetData(OrigDataLayout);
    105   DataLayout = llvm_alloc_data_layout(LLVMCreateTargetData(TargetDataCStr));
    106   LLVMDisposeMessage(TargetDataCStr);
    107 
    108   return DataLayout;
    109 }
    110 
    111 /* Llvm.llvalue -> int64 -> llexecutionengine -> unit */
    112 CAMLprim value llvm_ee_add_global_mapping(LLVMValueRef Global, value Ptr,
    113                                           LLVMExecutionEngineRef EE) {
    114   LLVMAddGlobalMapping(EE, Global, (void*) (Int64_val(Ptr)));
    115   return Val_unit;
    116 }
    117 
    118 CAMLprim value llvm_ee_get_global_value_address(value Name,
    119 						LLVMExecutionEngineRef EE) {
    120   return caml_copy_int64((int64_t) LLVMGetGlobalValueAddress(EE, String_val(Name)));
    121 }
    122 
    123 CAMLprim value llvm_ee_get_function_address(value Name,
    124 					    LLVMExecutionEngineRef EE) {
    125   return caml_copy_int64((int64_t) LLVMGetFunctionAddress(EE, String_val(Name)));
    126 }
    127