MCJIT support for non-function sections.

Move to a by-section allocation and relocation scheme. This allows
better support for sections which do not contain externally visible
symbols.

Flesh out the relocation address vs. local storage address separation a
bit more as well. Remote process JITs use this to tell the relocation
resolution code where the code will live when it executes.

The startFunctionBody/endFunctionBody interfaces to the JIT and the
memory manager are deprecated. They'll stick around for as long as the
old JIT does, but the MCJIT doesn't use them anymore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148258 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 18 insertions, 0 deletions

diff --git a/tools/llvm-rtdyld/llvm-rtdyld.cpp b/tools/llvm-rtdyld/llvm-rtdyld.cpp
index 0065880..9fec7c4 100644
--- a/tools/llvm-rtdyld/llvm-rtdyld.cpp
+++ b/tools/llvm-rtdyld/llvm-rtdyld.cpp
@@ -51,12 +51,30 @@ EntryPoint("entry",
 class TrivialMemoryManager : public RTDyldMemoryManager {
 public:
   SmallVector<sys::MemoryBlock, 16> FunctionMemory;
+  SmallVector<sys::MemoryBlock, 16> DataMemory;
+
+  uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+                               unsigned SectionID);
+  uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+                               unsigned SectionID);
 
   uint8_t *startFunctionBody(const char *Name, uintptr_t &Size);
   void endFunctionBody(const char *Name, uint8_t *FunctionStart,
                        uint8_t *FunctionEnd);
 };
 
+uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
+                                                   unsigned Alignment,
+                                                   unsigned SectionID) {
+  return (uint8_t*)sys::Memory::AllocateRWX(Size, 0, 0).base();
+}
+
+uint8_t *TrivialMemoryManager::allocateDataSection(uintptr_t Size,
+                                                   unsigned Alignment,
+                                                   unsigned SectionID) {
+  return (uint8_t*)sys::Memory::AllocateRWX(Size, 0, 0).base();
+}
+
 uint8_t *TrivialMemoryManager::startFunctionBody(const char *Name,
                                                  uintptr_t &Size) {
   return (uint8_t*)sys::Memory::AllocateRWX(Size, 0, 0).base();