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/*****************************************************************************/
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/* pemagination: a (virtual) tour into portable bits and executable bytes */
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/* Copyright (C) 2013,2014,2015 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_get_kernel32_handle_callback(
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struct pe_ldr_tbl_entry * ldr_tbl_entry,
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enum pe_callback_reason reason,
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void * context)
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{
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#define KERNEL32_UTF16_STRLEN 24
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int32_t kernel32_base_name_le[4];
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char * kernel32_base_name_ansi;
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intptr_t * addr;
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char * ch;
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size_t match;
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/* avoid scan-based false positives */
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kernel32_base_name_le[0] = 0x6E72656B; /* 'kern' */
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kernel32_base_name_le[1] = 0x32336C65; /* 'el32' */
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kernel32_base_name_le[2] = 0x6C6C642E; /* '.dll' */
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kernel32_base_name_le[3] = 0;
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kernel32_base_name_ansi = (char *)&kernel32_base_name_le;
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match = 0;
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addr = (intptr_t *)context;
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if (reason == PE_CALLBACK_REASON_ITEM)
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if (ldr_tbl_entry->base_dll_name.strlen == KERNEL32_UTF16_STRLEN) {
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ch = (char *)ldr_tbl_entry->base_dll_name.buffer;
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match = 0;
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while ((match < sizeof(kernel32_base_name_ansi))
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&& ((*ch == kernel32_base_name_ansi[match])
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|| (*ch == (kernel32_base_name_ansi[match] + 'A' - 'a')))
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&& (*(ch + 1) == 0)) {
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ch+=sizeof(uint16_t);
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match++;
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}
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}
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if (match == sizeof(kernel32_base_name_ansi)) {
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*addr = (intptr_t)ldr_tbl_entry->dll_base;
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return 0;
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}
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else
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return 1;
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}
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pe_api
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void * pe_get_kernel32_module_handle(void)
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{
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intptr_t kernel32_base_addr = 0;
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void * ptr_to_callback = &kernel32_base_addr;
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pe_enum_modules_in_init_order(
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&pe_get_kernel32_handle_callback,
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ptr_to_callback);
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return (void *)kernel32_base_addr;
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}
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