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/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013--2021 SysDeer Technologies, LLC */
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
/********************************************************/
#include <psxtypes/psxtypes.h>
#include <ntapi/nt_ldr.h>
#include <ntapi/ntapi.h>
#include "ntapi_impl.h"
int32_t __stdcall __ntapi_ldr_load_system_dll(
__in void * hsysdir __optional,
__in wchar16_t * base_name,
__in uint16_t base_name_size,
__in uint32_t * image_flags __optional,
__out void ** image_base)
{
int32_t status;
void * hkernel32;
wchar16_t * wch;
wchar16_t * cap;
wchar16_t * sysdir;
nt_unicode_string nt_sysdir;
nt_unicode_string nt_image_name;
size_t buffer[0x200/sizeof(size_t)];
void * (*load_library_ex_utf16)(
wchar16_t *,
void *,
uint32_t);
(void)image_flags;
/* shell-style dos path */
sysdir = (wchar16_t *)buffer;
if ((status = __ntapi->tt_get_system_directory_dos_path(
hsysdir,
sysdir,sizeof(buffer),
0,0,&nt_sysdir)))
return status;
sysdir = &sysdir[4];
/* image */
nt_image_name.strlen = base_name_size;
nt_image_name.maxlen = base_name_size;
nt_image_name.buffer = base_name;
/* the logical way */
status = __ntapi->ldr_load_dll(
sysdir,0,
&nt_image_name,
image_base);
/* eight point one big sigh support */
if (status) {
cap = &sysdir[sizeof(buffer)/sizeof(wchar16_t)];
for (wch=sysdir; *wch; wch++)
(void)0;
if (&wch[base_name_size/sizeof(wchar16_t)] >= cap)
return NT_STATUS_BUFFER_TOO_SMALL;
if (!(hkernel32 = pe_get_kernel32_module_handle()))
return NT_STATUS_INTERNAL_ERROR;
if (!(load_library_ex_utf16 = pe_get_procedure_address(
hkernel32,"LoadLibraryExW")))
return NT_STATUS_INTERNAL_ERROR;
__ntapi->tt_memcpy_utf16(
wch,base_name,
base_name_size);
wch[base_name_size/sizeof(wchar16_t)] = 0;
if ((*image_base = load_library_ex_utf16(sysdir,0,0)))
status = NT_STATUS_SUCCESS;
}
/* downlevel... */
if (status) {
if (&wch[base_name_size/sizeof(wchar16_t)] >= &cap[-10])
return NT_STATUS_BUFFER_TOO_SMALL;
*wch++ = 'd';
*wch++ = 'o';
*wch++ = 'w';
*wch++ = 'n';
*wch++ = 'l';
*wch++ = 'e';
*wch++ = 'v';
*wch++ = 'e';
*wch++ = 'l';
*wch++ = '\\';
__ntapi->tt_memcpy_utf16(
wch,base_name,
base_name_size);
wch[base_name_size/sizeof(wchar16_t)] = 0;
if ((*image_base = load_library_ex_utf16(sysdir,0,0)))
status = NT_STATUS_SUCCESS;
}
return status;
}
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