added incomplete ds loader

svn-id: r50587

1 files changed, 79 insertions, 0 deletions

diff --git a/backends/platform/ds/dsloader.h b/backends/platform/ds/dsloader.h
new file mode 100644
index 0000000000..f8a3cdefa4
--- /dev/null
+++ b/backends/platform/ds/dsloader.h
@@ -0,0 +1,79 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef DS_LOADER_H
+#define DS_LOADER_H
+
+#include "elf32.h"
+
+#define MAXDLERRLEN 80
+
+class DLObject {
+	protected:
+		char *_errbuf; /* For error messages, at least MAXDLERRLEN in size */
+
+		void *_segment, *_symtab;
+		char *_strtab;
+		int _symbol_cnt;
+		int _symtab_sect;
+		void *_dtors_start, *_dtors_end;
+
+		int _segmentSize;
+
+		void seterror(const char *fmt, ...);
+		void unload();
+		bool relocate(int fd, unsigned long offset, unsigned long size, void *relSegment);
+		bool load(int fd);
+
+		bool readElfHeader(int fd, Elf32_Ehdr *ehdr);
+		bool readProgramHeaders(int fd, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num);
+		bool loadSegment(int fd, Elf32_Phdr *phdr);
+		Elf32_Shdr *loadSectionHeaders(int fd, Elf32_Ehdr *ehdr);
+		int loadSymbolTable(int fd, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
+		bool loadStringTable(int fd, Elf32_Shdr *shdr);
+		void relocateSymbols(Elf32_Addr offset);
+		bool relocateRels(int fd, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
+
+	public:
+		bool open(const char *path);
+		bool close();
+		void *symbol(const char *name);
+		void discard_symtab();
+
+		DLObject(char *errbuf = NULL) : _errbuf(_errbuf), _segment(NULL),_symtab(NULL),
+				_strtab(NULL), _symbol_cnt(0), _dtors_start(NULL), _dtors_end(NULL) {}
+};
+
+#define RTLD_LAZY 0
+
+extern "C" {
+  void *dlopen(const char *filename, int flags);
+  int dlclose(void *handle);
+  void *dlsym(void *handle, const char *symbol);
+  const char *dlerror();
+  void dlforgetsyms(void *handle);
+}
+
+#endif /* DS_LOADER_H */