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/*****************************************************************************/
/* 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"
static int pe_get_kernel32_handle_callback(
struct pe_ldr_tbl_entry * ldr_tbl_entry,
enum pe_callback_reason reason,
void * context)
{
#define KERNEL32_UTF16_STRLEN 24
int32_t kernel32_base_name_le[4];
char * kernel32_base_name_ansi;
intptr_t * addr;
char * ch;
size_t match;
/* avoid scan-based false positives */
kernel32_base_name_le[0] = 0x6E72656B; /* 'kern' */
kernel32_base_name_le[1] = 0x32336C65; /* 'el32' */
kernel32_base_name_le[2] = 0x6C6C642E; /* '.dll' */
kernel32_base_name_le[3] = 0;
kernel32_base_name_ansi = (char *)&kernel32_base_name_le;
match = 0;
addr = (intptr_t *)context;
if (reason == PE_CALLBACK_REASON_ITEM)
if (ldr_tbl_entry->base_dll_name.strlen == KERNEL32_UTF16_STRLEN) {
ch = (char *)ldr_tbl_entry->base_dll_name.buffer;
match = 0;
while ((match < sizeof(kernel32_base_name_ansi))
&& ((*ch == kernel32_base_name_ansi[match])
|| (*ch == (kernel32_base_name_ansi[match] + 'A' - 'a')))
&& (*(ch + 1) == 0)) {
ch+=sizeof(uint16_t);
match++;
}
}
if (match == sizeof(kernel32_base_name_ansi)) {
*addr = (intptr_t)ldr_tbl_entry->dll_base;
return 0;
}
else
return 1;
}
pe_api
void * pe_get_kernel32_module_handle(void)
{
intptr_t kernel32_base_addr = 0;
void * ptr_to_callback = &kernel32_base_addr;
pe_enum_modules_in_init_order(
&pe_get_kernel32_handle_callback,
ptr_to_callback);
return (void *)kernel32_base_addr;
}
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