Blame src/modules/pe_enum_modules.c

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/*****************************************************************************/
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/*  pemagination: a (virtual) tour into portable bits and executable bytes   */
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/*  Copyright (C) 2013--2017  Z. Gilboa                                      */
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/*  Released under GPLv2 and GPLv3; see COPYING.PEMAGINE.                    */
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/*****************************************************************************/
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#include <psxtypes/psxtypes.h>
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#include <pemagine/pe_consts.h>
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#include <pemagine/pe_structs.h>
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#include <pemagine/pemagine.h>
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#include "pe_impl.h"
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static int pe_enum_modules(
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	pe_enum_modules_callback *	callback,
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	const uintptr_t			in_order_member_offset,
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	void *				context)
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{
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	int				ret;
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	uintptr_t 			peb_tbl_addr;
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	struct pe_peb_ldr_data *	peb_ldr_data;
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	struct pe_ldr_tbl_entry *	ldr_tbl_entry;
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	struct pe_list_entry *		plist_head;
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	struct pe_list_entry * 		plist_current;
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	peb_ldr_data = (struct pe_peb_ldr_data *)pe_get_peb_ldr_data_address();
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	plist_head   = (struct pe_list_entry *)0;
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	if ((intptr_t)peb_ldr_data == 0) {
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		callback(
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			0,
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			PE_CALLBACK_REASON_ERROR,
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			context);
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		return -1;
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	}
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	ret = callback(
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		0,
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		PE_CALLBACK_REASON_INIT,
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		context);
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	if (ret <= 0)
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		return ret;
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	switch (in_order_member_offset) {
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		case IN_LOAD_ORDER_MODULE_LIST_OFFSET:
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			plist_head = peb_ldr_data->in_load_order_module_list.flink;
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			break;
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		case IN_MEMORY_ORDER_MODULE_LIST_OFFSET:
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			plist_head = peb_ldr_data->in_memory_order_module_list.flink;
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			break;
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		case IN_INITIALIZATION_ORDER_MODULE_LIST_OFFSET:
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			plist_head = peb_ldr_data->in_init_order_module_list.flink;
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			break;
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	}
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	plist_current = plist_head;
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	do {
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		peb_tbl_addr	= (uintptr_t)plist_current - in_order_member_offset;
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		ldr_tbl_entry	= (struct pe_ldr_tbl_entry *)peb_tbl_addr;
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		ret = callback(
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			ldr_tbl_entry,
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			PE_CALLBACK_REASON_ITEM,
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			context);
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		if (ret <= 0)
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			return ret;
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		else
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			plist_current = plist_current->flink;
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	} while (plist_current != plist_head);
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	ret = callback(
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			ldr_tbl_entry,
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			PE_CALLBACK_REASON_DONE,
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			context);
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	return ret;
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}
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int pe_enum_modules_in_load_order(pe_enum_modules_callback * fn, void * ctx)
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{
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	return pe_enum_modules(fn,IN_LOAD_ORDER_MODULE_LIST_OFFSET,ctx);
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}
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int pe_enum_modules_in_memory_order(pe_enum_modules_callback * fn, void * ctx)
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{
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	return pe_enum_modules(fn,IN_MEMORY_ORDER_MODULE_LIST_OFFSET,ctx);
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}
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int pe_enum_modules_in_init_order(pe_enum_modules_callback * fn, void * ctx)
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{
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	return pe_enum_modules(fn,IN_INITIALIZATION_ORDER_MODULE_LIST_OFFSET,ctx);
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}