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-rw-r--r--src/modules/pe_get_module_handle.c80
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;
+}