initial commit.

1 files changed, 80 insertions, 0 deletions

diff --git a/src/modules/pe_get_module_handle.c b/src/modules/pe_get_module_handle.c
new file mode 100644
index 0000000..7677ba0
--- /dev/null
+++ b/src/modules/pe_get_module_handle.c
@@ -0,0 +1,80 @@
+/*****************************************************************************/
+/*  pemagination: a (virtual) tour into portable bits and executable bytes   */
+/*  Copyright (C) 2013,2014,2015  Z. Gilboa                                  */
+/*  Released under GPLv2 and GPLv3; see COPYING.PEMAGINE.                    */
+/*****************************************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <pemagine/pe_consts.h>
+#include <pemagine/pe_structs.h>
+#include <pemagine/pemagine.h>
+#include "pe_impl.h"
+
+pe_api
+void * pe_get_first_module_handle(void)
+{
+	struct pe_peb_ldr_data *	peb_ldr_data;
+	struct pe_list_entry *   	peb_list_entry;
+	intptr_t 			peb_tbl_addr;
+	struct pe_ldr_tbl_entry *	peb_ldr_tbl_entry;
+
+	peb_ldr_data		= (struct pe_peb_ldr_data *)pe_get_peb_ldr_data_address();
+	peb_list_entry		= (struct pe_list_entry *)peb_ldr_data->in_load_order_module_list.flink;
+	peb_tbl_addr		= (intptr_t)peb_list_entry - IN_LOAD_ORDER_MODULE_LIST_OFFSET;
+	peb_ldr_tbl_entry	= (struct pe_ldr_tbl_entry *)peb_tbl_addr;
+
+	return peb_ldr_tbl_entry->dll_base;
+}
+
+pe_api
+void * pe_get_module_handle(const wchar16_t * name)
+{
+	wchar16_t * src;
+	wchar16_t * dst;
+
+	size_t match;
+	size_t len;
+
+	struct pe_peb_ldr_data *	peb_ldr_data;
+	struct pe_list_entry *		plist_head;
+
+	struct pe_list_entry *		plist_current;
+	struct pe_ldr_tbl_entry *	ldr_tbl_entry = 0;
+
+	peb_ldr_data  = (struct pe_peb_ldr_data *)pe_get_peb_ldr_data_address();
+	plist_head    = (struct pe_list_entry *)peb_ldr_data->in_load_order_module_list.flink;
+	plist_current = plist_head;
+
+	len = pe_impl_strlen_utf16(name);
+
+	do {
+		ldr_tbl_entry = (struct pe_ldr_tbl_entry *)plist_current - IN_LOAD_ORDER_MODULE_LIST_OFFSET;
+
+		if (ldr_tbl_entry->base_dll_name.strlen == len)
+			dst = (wchar16_t *)ldr_tbl_entry->base_dll_name.buffer;
+		else if (ldr_tbl_entry->full_dll_name.strlen == len)
+			dst = (wchar16_t *)ldr_tbl_entry->full_dll_name.buffer;
+                else
+                        dst = (wchar16_t *)0;
+
+		if ((intptr_t)(dst)) {
+		        src   = (wchar16_t *)name;
+			match = 0;
+
+			while ((match < len)
+				&& ((pe_impl_utf16_char_to_lower(*src)) == (pe_impl_utf16_char_to_lower(*dst)))) {
+					src = (wchar16_t *)pe_va_from_rva(src,sizeof(wchar16_t));
+					dst = (wchar16_t *)pe_va_from_rva(dst,sizeof(wchar16_t));
+					match+=sizeof(wchar16_t);
+				}
+
+			if (match == len)
+				return ldr_tbl_entry->dll_base;
+		}
+
+		plist_current = plist_current->flink;
+	} while (plist_current != plist_head);
+
+	/* address not found */
+	return 0;
+}