New file for the MachORelocation structure. It doesn't have to be tied to the

MachOWriter.h file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33812 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/MachORelocation.h b/include/llvm/CodeGen/MachORelocation.h
new file mode 100644 (file)
index 0000000..6bf176d
--- /dev/null
+++ b/include/llvm/CodeGen/MachORelocation.h
@@ -0,0 +1,54 @@
+//=== MachORelocation.h - Mach-O Relocation Info ----------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Bill Wendling and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the MachORelocation class.
+//
+//===----------------------------------------------------------------------===//
+
+
+#ifndef LLVM_CODEGEN_MACHO_RELOCATION_H
+#define LLVM_CODEGEN_MACHO_RELOCATION_H
+
+namespace llvm {
+
+  /// MachORelocation - This struct contains information about each relocation
+  /// that needs to be emitted to the file.
+  /// see <mach-o/reloc.h>
+  class MachORelocation {
+    uint32_t r_address;   // offset in the section to what is being  relocated
+    uint32_t r_symbolnum; // symbol index if r_extern == 1 else section index
+    bool     r_pcrel;     // was relocated pc-relative already
+    uint8_t  r_length;    // length = 2 ^ r_length
+    bool     r_extern;    // 
+    uint8_t  r_type;      // if not 0, machine-specific relocation type.
+    bool     r_scattered; // 1 = scattered, 0 = non-scattered
+    int32_t  r_value;     // the value the item to be relocated is referring
+                          // to.
+  public:      
+    uint32_t getPackedFields() const {
+      if (r_scattered)
+        return (1 << 31) | (r_pcrel << 30) | ((r_length & 3) << 28) | 
+          ((r_type & 15) << 24) | (r_address & 0x00FFFFFF);
+      else
+        return (r_symbolnum << 8) | (r_pcrel << 7) | ((r_length & 3) << 5) |
+          (r_extern << 4) | (r_type & 15);
+    }
+    uint32_t getAddress() const { return r_scattered ? r_value : r_address; }
+    uint32_t getRawAddress() const { return r_address; }
+
+    MachORelocation(uint32_t addr, uint32_t index, bool pcrel, uint8_t len,
+                    bool ext, uint8_t type, bool scattered = false, 
+                    int32_t value = 0) : 
+      r_address(addr), r_symbolnum(index), r_pcrel(pcrel), r_length(len),
+      r_extern(ext), r_type(type), r_scattered(scattered), r_value(value) {}
+  };
+
+} // end llvm namespace
+
+#endif // LLVM_CODEGEN_MACHO_RELOCATION_H