new object file format in compiler

[l2e.git] / src / loader / ObjectFile.cpp

diff --git a/src/loader/ObjectFile.cpp b/src/loader/ObjectFile.cpp
index 4cb886223c80150216cdad339bdbc59312bcbafe..929b54a24025d01e57080593b37e28a5538a7ab7 100644 (file)
--- a/src/loader/ObjectFile.cpp
+++ b/src/loader/ObjectFile.cpp
@@ -1,12 +1,10 @@
-/*
- * ObjectFile.cpp
- *
- *  Created on: Sep 15, 2012
- *      Author: holy
- */
-
 #include "ObjectFile.h"
 
+#include <stdexcept>
+
+using std::runtime_error;
+
+
 namespace loader {
 
 ObjectFileHeader::ObjectFileHeader()
@@ -15,40 +13,114 @@ ObjectFileHeader::ObjectFileHeader()
 , exportsEnd(0)
 , externalsBegin(0)
 , externalsEnd(0)
-, exportStringsBegin(0)
-, exportStringsEnd(0)
-, externalStringsBegin(0)
-, externalStringsEnd(0)
-, imagesBegin(0)
-, imagesEnd(0)
 , objectsBegin(0)
-, objectsEnd(0) {
+, objectsEnd(0)
+, arraysBegin(0)
+, arraysEnd(0) {
        ident[0] = 'L';
        ident[1] = '2';
        ident[2] = 'E';
        ident[3] = '\n';
 }
 
-LoadedObjectFile::LoadedObjectFile()
-: allocPtr(0)
-, fileHeader(0)
-, typeOffsetsBegin(0)
-, typeOffsetsEnd(0)
-, exportsBegin(0)
-, exportsEnd(0)
-, externalsBegin(0)
-, externalsEnd(0)
-, exportStringsBegin(0)
-, exportStringsEnd(0)
-, externalStringsBegin(0)
-, externalStringsEnd(0)
-, imagesBegin(0)
-, imagesEnd(0)
-, objectsBegin(0)
-, objectsEnd(0)
-, surfaces(0)
-, surfaceCount(0) {
+void ObjectFileHeader::IntegrityCheck(unsigned int fsize) const {
+       if (ident[0] != 'L'
+                       || ident[1] != '2'
+                       || ident[2] != 'E'
+                       || ident[3] != '\n') {
+               throw runtime_error("magic bytes mismatch");
+       }
+       if (versionId != FORMAT_ID) {
+               throw runtime_error("format ID mismatch");
+       }
+       if (exportsBegin < sizeof(ObjectFileHeader)
+                       || exportsBegin > fsize) {
+               throw runtime_error("exports section out of bounds");
+       }
+       if (exportsEnd < exportsBegin
+                       || exportsEnd > fsize
+                       || (exportsEnd - exportsBegin) % sizeof(Export) != 0) {
+               throw runtime_error("bogus exports section end");
+       }
+       if (externalsBegin < sizeof(ObjectFileHeader)
+                       || externalsBegin >= fsize) {
+               throw runtime_error("externals section out of bounds");
+       }
+       if (externalsEnd < externalsBegin
+                       || externalsEnd > fsize
+                       || (externalsEnd - externalsBegin) % sizeof(External) != 0) {
+               throw runtime_error("bogus externals section end");
+       }
+       if (objectsBegin < sizeof(ObjectFileHeader)
+                       || objectsBegin >= fsize
+                       || objectsEnd < objectsBegin
+                       || objectsEnd > fsize) {
+               throw runtime_error("objects section out of bounds");
+       }
+       if (arraysBegin < sizeof(ObjectFileHeader)
+                       || arraysBegin >= fsize
+                       || arraysEnd < arraysBegin
+                       || arraysEnd > fsize) {
+               throw runtime_error("arrays section out of bounds");
+       }
+}
+
+Export *ObjectFileHeader::ExportsBegin() {
+       char *data = reinterpret_cast<char *>(this);
+       return reinterpret_cast<Export *>(data + exportsBegin);
+}
+
+Export *ObjectFileHeader::ExportsEnd() {
+       char *data = reinterpret_cast<char *>(this);
+       return reinterpret_cast<Export *>(data + exportsEnd);
+}
+
+External *ObjectFileHeader::ExternalsBegin() {
+       char *data = reinterpret_cast<char *>(this);
+       return reinterpret_cast<External *>(data + externalsBegin);
+}
+
+External *ObjectFileHeader::ExternalsEnd() {
+       char *data = reinterpret_cast<char *>(this);
+       return reinterpret_cast<External *>(data + externalsEnd);
+}
+
+Object *ObjectFileHeader::ObjectsBegin() {
+       char *data = reinterpret_cast<char *>(this);
+       return reinterpret_cast<Object *>(data + objectsBegin);
+}
+
+Object *ObjectFileHeader::ObjectsEnd() {
+       char *data = reinterpret_cast<char *>(this);
+       return reinterpret_cast<Object *>(data + objectsEnd);
+}
+
+Array *ObjectFileHeader::ArraysBegin() {
+       char *data = reinterpret_cast<char *>(this);
+       return reinterpret_cast<Array *>(data + arraysBegin);
+}
+
+Array *ObjectFileHeader::ArraysEnd() {
+       char *data = reinterpret_cast<char *>(this);
+       return reinterpret_cast<Array *>(data + arraysEnd);
+}
+
+
+char *Object::RawObject() {
+       return reinterpret_cast<char *>(this) + sizeof(Object);
+}
+
+Object *Object::Next() {
+       return reinterpret_cast<Object *>(RawObject() + size);
+}
+
+
+char *Array::Data() {
+       return reinterpret_cast<char *>(this) + sizeof(Array);
+}
 
+Array *Array::Next() {
+       return reinterpret_cast<Array *>(Data() + size);
 }
 
 }