From 30e2817dc5bfaadde6439131b4f280a79ee03950 Mon Sep 17 00:00:00 2001
From: Brian Gaeke <gaeke@uiuc.edu>
Date: Fri, 10 Oct 2003 17:02:42 +0000
Subject: [PATCH] Change to use GetAddressOfSymbol instead of dlsym.

llvm-svn: 9012
---
 lib/ExecutionEngine/ExecutionEngine.cpp | 12 ++++--------
 lib/ExecutionEngine/JIT/Intercept.cpp   | 15 +++++----------
 2 files changed, 9 insertions(+), 18 deletions(-)

diff --git a/lib/ExecutionEngine/ExecutionEngine.cpp b/lib/ExecutionEngine/ExecutionEngine.cpp
index b7aa3ba87f5..fb70ff1e725 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -16,6 +16,7 @@
 #include "llvm/Target/TargetData.h"
 #include "Support/Debug.h"
 #include "Support/Statistic.h"
+#include "Support/DynamicLinker.h"
 #include "Config/dlfcn.h"
 
 Statistic<> NumInitBytes("lli", "Number of bytes of global vars initialized");
@@ -339,14 +340,9 @@ void ExecutionEngine::emitGlobals() {
       DEBUG(std::cerr << "Global '" << I->getName() << "' -> "
 	              << (void*)GlobalAddress[I] << "\n");
     } else {
-      // On Sparc, RTLD_SELF is already defined and it's not zero
-      // Linux/x86 wants to use a 0, other systems may differ
-#ifndef RTLD_SELF
-#define RTLD_SELF 0
-#endif
-      // External variable reference, try to use dlsym to get a pointer to it in
-      // the LLI image.
-      if (void *SymAddr = dlsym(RTLD_SELF, I->getName().c_str()))
+      // External variable reference. Try to use the dynamic loader to
+      // get a pointer to it.
+      if (void *SymAddr = GetAddressOfSymbol(I->getName().c_str()))
         GlobalAddress[I] = SymAddr;
       else {
         std::cerr << "Could not resolve external global address: "
diff --git a/lib/ExecutionEngine/JIT/Intercept.cpp b/lib/ExecutionEngine/JIT/Intercept.cpp
index 09cbe28740a..6df6088a3a8 100644
--- a/lib/ExecutionEngine/JIT/Intercept.cpp
+++ b/lib/ExecutionEngine/JIT/Intercept.cpp
@@ -1,7 +1,7 @@
 //===-- Intercept.cpp - System function interception routines -------------===//
 //
 // If a function call occurs to an external function, the JIT is designed to use
-// dlsym on the current process to find a function to call.  This is useful for
+// the dynamic loader interface to find a function to call.  This is useful for
 // calling system calls and library functions that are not available in LLVM.
 // Some system calls, however, need to be handled specially.  For this reason,
 // we intercept some of them here and use our own stubs to handle them.
@@ -9,7 +9,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "VM.h"
-#include "Config/dlfcn.h"    // dlsym access
+#include "Support/DynamicLinker.h"
 #include <iostream>
 
 // AtExitHandlers - List of functions to call when the program exits,
@@ -50,8 +50,8 @@ static int jit_atexit(void (*Fn)(void)) {
 //===----------------------------------------------------------------------===//
 // 
 /// getPointerToNamedFunction - This method returns the address of the specified
-/// function by using the dlsym function call.  As such it is only useful for
-/// resolving library symbols, not code generated symbols.
+/// function by using the dynamic loader interface.  As such it is only useful 
+/// for resolving library symbols, not code generated symbols.
 ///
 void *VM::getPointerToNamedFunction(const std::string &Name) {
   // Check to see if this is one of the functions we want to intercept...
@@ -59,12 +59,7 @@ void *VM::getPointerToNamedFunction(const std::string &Name) {
   if (Name == "atexit") return (void*)&jit_atexit;
 
   // If it's an external function, look it up in the process image...
-  // On Sparc, RTLD_SELF is already defined and it's not zero
-  // Linux/x86 wants to use a 0, other systems may differ
-#ifndef RTLD_SELF
-#define RTLD_SELF 0
-#endif
-  void *Ptr = dlsym(RTLD_SELF, Name.c_str());
+  void *Ptr = GetAddressOfSymbol(Name);
   if (Ptr == 0) {
     std::cerr << "WARNING: Cannot resolve fn '" << Name
 	      << "' using a dummy noop function instead!\n";