Blame src/ldso/pe_open_image_from_addr.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/pemagine.h>
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#include <pemagine/pe_structs.h>
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#include "pe_os.h"
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struct os_memory_section_name {
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	struct pe_unicode_str	section_name;
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	wchar16_t		section_name_buffer[];
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};
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pe_api int32_t pe_open_image_from_addr(
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	__out	void **			himage,
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	__in	void *			addr,
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	__out	uintptr_t *		buffer,
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	__in	uint32_t		buffer_size,
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	__in	uint32_t		oattr,
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	__in	uint32_t		desired_access,
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	__in	uint32_t		share_access,
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	__in	uint32_t		open_options)
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{
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	int32_t				status;
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	struct os_oa			oa;
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	struct os_iosb			iosb;
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	struct os_memory_section_name *	path;
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	uint32_t			len;
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	void *				hntdll;
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	os_zw_query_virtual_memory *	zw_query_virtual_memory;
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	os_zw_open_file *		zw_open_file;
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	/* init */
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	path = (struct os_memory_section_name *)buffer;
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	path->section_name.strlen = 0;
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	path->section_name.maxlen = (uint16_t)(buffer_size - sizeof(struct pe_unicode_str));
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	path->section_name.buffer = path->section_name_buffer;
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	if (!(hntdll = pe_get_ntdll_module_handle()))
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		return OS_STATUS_INTERNAL_ERROR;
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	if (!(zw_query_virtual_memory = (os_zw_query_virtual_memory *)pe_get_procedure_address(
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			hntdll,"ZwQueryVirtualMemory")))
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		return OS_STATUS_INTERNAL_ERROR;
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	if (!(zw_open_file = (os_zw_open_file *)pe_get_procedure_address(
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			hntdll,"ZwOpenFile")))
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		return OS_STATUS_INTERNAL_ERROR;
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	/* native path of image containing addr */
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	if ((status = zw_query_virtual_memory(
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			OS_CURRENT_PROCESS_HANDLE,
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			addr,
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			OS_MEMORY_SECTION_NAME,
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			buffer,
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			buffer_size,
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			&len)))
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		return status;
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	/* oa */
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	oa.len      = sizeof(struct os_oa);
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	oa.root_dir = 0;
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	oa.obj_name = &path->section_name;
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	oa.obj_attr = oattr;
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	oa.sec_desc = 0;
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	oa.sec_qos  = 0;
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	/* default access */
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	desired_access = desired_access
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		? desired_access
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		: OS_SEC_SYNCHRONIZE | OS_FILE_READ_ATTRIBUTES | OS_FILE_READ_ACCESS;
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	/* open image */
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	return zw_open_file(
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		himage,
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		desired_access,
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		&oa,&iosb,
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		share_access,
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		open_options | OS_FILE_NON_DIRECTORY_FILE);
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}