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/*
* WoW64 syscall wrapping
*
* Copyright 2021 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winnt.h"
#include "winternl.h"
#include "wine/exception.h"
#include "wine/unixlib.h"
#include "wow64_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wow);
USHORT native_machine = 0;
USHORT current_machine = 0;
ULONG_PTR args_alignment = 0;
typedef NTSTATUS (WINAPI *syscall_thunk)( UINT *args );
static const syscall_thunk syscall_thunks[] =
{
#define SYSCALL_ENTRY(func) wow64_ ## func,
ALL_SYSCALLS
#undef SYSCALL_ENTRY
};
static const char *syscall_names[] =
{
#define SYSCALL_ENTRY(func) #func,
ALL_SYSCALLS
#undef SYSCALL_ENTRY
};
static const SYSTEM_SERVICE_TABLE ntdll_syscall_table =
{
(ULONG_PTR *)syscall_thunks,
(ULONG_PTR *)syscall_names,
ARRAY_SIZE(syscall_thunks)
};
static SYSTEM_SERVICE_TABLE syscall_tables[4];
/* header for Wow64AllocTemp blocks; probably not the right layout */
struct mem_header
{
struct mem_header *next;
void *__pad;
BYTE data[1];
};
SYSTEM_DLL_INIT_BLOCK *pLdrSystemDllInitBlock = NULL;
/* wow64win syscall table */
static const SYSTEM_SERVICE_TABLE *psdwhwin32;
/* cpu backend dll functions */
static void * (WINAPI *pBTCpuGetBopCode)(void);
static void (WINAPI *pBTCpuProcessInit)(void);
static void (WINAPI *pBTCpuSimulate)(void);
void *dummy = RtlUnwind;
BOOL WINAPI DllMain( HINSTANCE inst, DWORD reason, void *reserved )
{
if (reason == DLL_PROCESS_ATTACH) LdrDisableThreadCalloutsForDll( inst );
return TRUE;
}
void __cdecl __wine_spec_unimplemented_stub( const char *module, const char *function )
{
EXCEPTION_RECORD record;
record.ExceptionCode = EXCEPTION_WINE_STUB;
record.ExceptionFlags = EH_NONCONTINUABLE;
record.ExceptionRecord = NULL;
record.ExceptionAddress = __wine_spec_unimplemented_stub;
record.NumberParameters = 2;
record.ExceptionInformation[0] = (ULONG_PTR)module;
record.ExceptionInformation[1] = (ULONG_PTR)function;
for (;;) RtlRaiseException( &record );
}
/**********************************************************************
* wow64_NtAddAtom
*/
NTSTATUS WINAPI wow64_NtAddAtom( UINT *args )
{
const WCHAR *name = get_ptr( &args );
ULONG len = get_ulong( &args );
RTL_ATOM *atom = get_ptr( &args );
return NtAddAtom( name, len, atom );
}
/**********************************************************************
* wow64_NtAllocateLocallyUniqueId
*/
NTSTATUS WINAPI wow64_NtAllocateLocallyUniqueId( UINT *args )
{
LUID *luid = get_ptr( &args );
return NtAllocateLocallyUniqueId( luid );
}
/**********************************************************************
* wow64_NtAllocateUuids
*/
NTSTATUS WINAPI wow64_NtAllocateUuids( UINT *args )
{
ULARGE_INTEGER *time = get_ptr( &args );
ULONG *delta = get_ptr( &args );
ULONG *sequence = get_ptr( &args );
UCHAR *seed = get_ptr( &args );
return NtAllocateUuids( time, delta, sequence, seed );
}
/**********************************************************************
* wow64_NtClose
*/
NTSTATUS WINAPI wow64_NtClose( UINT *args )
{
HANDLE handle = get_handle( &args );
return NtClose( handle );
}
/**********************************************************************
* wow64_NtDeleteAtom
*/
NTSTATUS WINAPI wow64_NtDeleteAtom( UINT *args )
{
RTL_ATOM atom = get_ulong( &args );
return NtDeleteAtom( atom );
}
/**********************************************************************
* wow64_NtFindAtom
*/
NTSTATUS WINAPI wow64_NtFindAtom( UINT *args )
{
const WCHAR *name = get_ptr( &args );
ULONG len = get_ulong( &args );
RTL_ATOM *atom = get_ptr( &args );
return NtFindAtom( name, len, atom );
}
/**********************************************************************
* wow64_NtGetCurrentProcessorNumber
*/
NTSTATUS WINAPI wow64_NtGetCurrentProcessorNumber( UINT *args )
{
return NtGetCurrentProcessorNumber();
}
/**********************************************************************
* wow64_NtQueryDefaultLocale
*/
NTSTATUS WINAPI wow64_NtQueryDefaultLocale( UINT *args )
{
BOOLEAN user = get_ulong( &args );
LCID *lcid = get_ptr( &args );
return NtQueryDefaultLocale( user, lcid );
}
/**********************************************************************
* wow64_NtQueryDefaultUILanguage
*/
NTSTATUS WINAPI wow64_NtQueryDefaultUILanguage( UINT *args )
{
LANGID *lang = get_ptr( &args );
return NtQueryDefaultUILanguage( lang );
}
/**********************************************************************
* wow64_NtQueryInformationAtom
*/
NTSTATUS WINAPI wow64_NtQueryInformationAtom( UINT *args )
{
RTL_ATOM atom = get_ulong( &args );
ATOM_INFORMATION_CLASS class = get_ulong( &args );
void *info = get_ptr( &args );
ULONG len = get_ulong( &args );
ULONG *retlen = get_ptr( &args );
if (class != AtomBasicInformation) FIXME( "class %u not supported\n", class );
return NtQueryInformationAtom( atom, class, info, len, retlen );
}
/**********************************************************************
* wow64_NtQueryInstallUILanguage
*/
NTSTATUS WINAPI wow64_NtQueryInstallUILanguage( UINT *args )
{
LANGID *lang = get_ptr( &args );
return NtQueryInstallUILanguage( lang );
}
/**********************************************************************
* wow64_NtSetDefaultLocale
*/
NTSTATUS WINAPI wow64_NtSetDefaultLocale( UINT *args )
{
BOOLEAN user = get_ulong( &args );
LCID lcid = get_ulong( &args );
return NtSetDefaultLocale( user, lcid );
}
/**********************************************************************
* wow64_NtSetDefaultUILanguage
*/
NTSTATUS WINAPI wow64_NtSetDefaultUILanguage( UINT *args )
{
LANGID lang = get_ulong( &args );
return NtSetDefaultUILanguage( lang );
}
/**********************************************************************
* wow64___wine_dbg_write
*/
NTSTATUS WINAPI wow64___wine_dbg_write( UINT *args )
{
const char *str = get_ptr( &args );
ULONG len = get_ulong( &args );
return __wine_dbg_write( str, len );
}
/**********************************************************************
* wow64___wine_unix_call
*/
NTSTATUS WINAPI wow64___wine_unix_call( UINT *args )
{
unixlib_handle_t handle = get_ulong64( &args );
unsigned int code = get_ulong( &args );
void *args_ptr = get_ptr( &args );
return __wine_unix_call( handle, code, args_ptr );
}
/**********************************************************************
* wow64___wine_unix_spawnvp
*/
NTSTATUS WINAPI wow64___wine_unix_spawnvp( UINT *args )
{
ULONG *argv32 = get_ptr( &args );
int wait = get_ulong( &args );
unsigned int i, count = 0;
char **argv;
while (argv32[count]) count++;
argv = Wow64AllocateTemp( (count + 1) * sizeof(*argv) );
for (i = 0; i < count; i++) argv[i] = ULongToPtr( argv32[i] );
argv[count] = NULL;
return __wine_unix_spawnvp( argv, wait );
}
/**********************************************************************
* wow64_wine_server_call
*/
NTSTATUS WINAPI wow64_wine_server_call( UINT *args )
{
struct __server_request_info32 *req32 = get_ptr( &args );
unsigned int i;
NTSTATUS status;
struct __server_request_info req;
req.u.req = req32->u.req;
req.data_count = req32->data_count;
for (i = 0; i < req.data_count; i++)
{
req.data[i].ptr = ULongToPtr( req32->data[i].ptr );
req.data[i].size = req32->data[i].size;
}
req.reply_data = ULongToPtr( req32->reply_data );
status = wine_server_call( &req );
req32->u.reply = req.u.reply;
return status;
}
/**********************************************************************
* get_syscall_num
*/
static DWORD get_syscall_num( const BYTE *syscall )
{
DWORD id = ~0u;
if (!syscall) return id;
switch (current_machine)
{
case IMAGE_FILE_MACHINE_I386:
if (syscall[0] == 0xb8 && syscall[5] == 0xba && syscall[10] == 0xff && syscall[11] == 0xd2)
id = *(DWORD *)(syscall + 1);
break;
case IMAGE_FILE_MACHINE_ARM:
if (*(WORD *)syscall == 0xb40f)
{
DWORD inst = *(DWORD *)((WORD *)syscall + 1);
id = ((inst << 1) & 0x0800) + ((inst << 12) & 0xf000) +
((inst >> 20) & 0x0700) + ((inst >> 16) & 0x00ff);
}
break;
}
return id;
}
/**********************************************************************
* init_image_mapping
*/
void init_image_mapping( HMODULE module )
{
void **ptr = RtlFindExportedRoutineByName( module, "Wow64Transition" );
if (ptr) *ptr = pBTCpuGetBopCode();
}
/**********************************************************************
* init_syscall_table
*/
static void init_syscall_table( HMODULE module, ULONG idx, const SYSTEM_SERVICE_TABLE *orig_table )
{
static syscall_thunk thunks[2048];
static ULONG start_pos;
const IMAGE_EXPORT_DIRECTORY *exports;
const ULONG *functions, *names;
const USHORT *ordinals;
ULONG id, exp_size, exp_pos, wrap_pos, max_pos = 0;
const char **syscall_names = (const char **)orig_table->CounterTable;
exports = RtlImageDirectoryEntryToData( module, TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size );
ordinals = get_rva( module, exports->AddressOfNameOrdinals );
functions = get_rva( module, exports->AddressOfFunctions );
names = get_rva( module, exports->AddressOfNames );
for (exp_pos = wrap_pos = 0; exp_pos < exports->NumberOfNames; exp_pos++)
{
char *name = get_rva( module, names[exp_pos] );
int res = -1;
if (strncmp( name, "Nt", 2 ) && strncmp( name, "wine", 4 ) && strncmp( name, "__wine", 6 ))
continue; /* not a syscall */
if ((id = get_syscall_num( get_rva( module, functions[ordinals[exp_pos]] ))) == ~0u)
continue; /* not a syscall */
if (wrap_pos < orig_table->ServiceLimit) res = strcmp( name, syscall_names[wrap_pos] );
if (!res) /* got a match */
{
ULONG table_idx = (id >> 12) & 3, table_pos = id & 0xfff;
if (table_idx == idx)
{
if (start_pos + table_pos < ARRAY_SIZE(thunks))
{
thunks[start_pos + table_pos] = (syscall_thunk)orig_table->ServiceTable[wrap_pos++];
max_pos = max( table_pos, max_pos );
}
else ERR( "invalid syscall id %04x for %s\n", id, name );
}
else ERR( "wrong syscall table id %04x for %s\n", id, name );
}
else if (res > 0)
{
FIXME( "no export for syscall %s\n", syscall_names[wrap_pos] );
wrap_pos++;
exp_pos--; /* try again */
}
else FIXME( "missing wrapper for syscall %04x %s\n", id, name );
}
for ( ; wrap_pos < orig_table->ServiceLimit; wrap_pos++)
FIXME( "no export for syscall %s\n", syscall_names[wrap_pos] );
syscall_tables[idx].ServiceTable = (ULONG_PTR *)(thunks + start_pos);
syscall_tables[idx].ServiceLimit = max_pos + 1;
start_pos += max_pos + 1;
}
/**********************************************************************
* load_64bit_module
*/
static HMODULE load_64bit_module( const WCHAR *name )
{
NTSTATUS status;
HMODULE module;
UNICODE_STRING str;
WCHAR path[MAX_PATH];
const WCHAR *dir = get_machine_wow64_dir( IMAGE_FILE_MACHINE_TARGET_HOST );
swprintf( path, MAX_PATH, L"%s\\%s", dir, name );
RtlInitUnicodeString( &str, path );
if ((status = LdrLoadDll( NULL, 0, &str, &module )))
{
ERR( "failed to load dll %x\n", status );
NtTerminateProcess( GetCurrentProcess(), status );
}
return module;
}
/**********************************************************************
* load_32bit_module
*/
static HMODULE load_32bit_module( const WCHAR *name )
{
NTSTATUS status;
UNICODE_STRING str;
WCHAR path[MAX_PATH];
HANDLE file, mapping;
LARGE_INTEGER size;
IO_STATUS_BLOCK io;
OBJECT_ATTRIBUTES attr;
SIZE_T len = 0;
void *module = NULL;
const WCHAR *dir = get_machine_wow64_dir( current_machine );
swprintf( path, MAX_PATH, L"%s\\%s", dir, name );
RtlInitUnicodeString( &str, path );
InitializeObjectAttributes( &attr, &str, OBJ_CASE_INSENSITIVE, 0, NULL );
if ((status = NtOpenFile( &file, GENERIC_READ | SYNCHRONIZE, &attr, &io,
FILE_SHARE_READ | FILE_SHARE_DELETE,
FILE_SYNCHRONOUS_IO_NONALERT | FILE_NON_DIRECTORY_FILE ))) goto failed;
size.QuadPart = 0;
status = NtCreateSection( &mapping, STANDARD_RIGHTS_REQUIRED | SECTION_QUERY |
SECTION_MAP_READ | SECTION_MAP_EXECUTE,
NULL, &size, PAGE_EXECUTE_READ, SEC_IMAGE, file );
NtClose( file );
if (status) goto failed;
status = NtMapViewOfSection( mapping, GetCurrentProcess(), &module, 0, 0, NULL, &len,
ViewShare, 0, PAGE_EXECUTE_READ );
NtClose( mapping );
if (!status) return module;
failed:
ERR( "failed to load dll %x\n", status );
NtTerminateProcess( GetCurrentProcess(), status );
return NULL;
}
/**********************************************************************
* get_cpu_dll_name
*/
static const WCHAR *get_cpu_dll_name(void)
{
switch (current_machine)
{
case IMAGE_FILE_MACHINE_I386:
return (native_machine == IMAGE_FILE_MACHINE_ARM64 ? L"xtajit.dll" : L"wow64cpu.dll");
case IMAGE_FILE_MACHINE_ARM:
return L"wowarmhw.dll";
default:
ERR( "unsupported machine %04x\n", current_machine );
RtlExitUserProcess( 1 );
}
}
/**********************************************************************
* process_init
*/
static DWORD WINAPI process_init( RTL_RUN_ONCE *once, void *param, void **context )
{
HMODULE module;
UNICODE_STRING str;
RtlWow64GetProcessMachines( GetCurrentProcess(), &current_machine, &native_machine );
if (!current_machine) current_machine = native_machine;
args_alignment = (current_machine == IMAGE_FILE_MACHINE_I386) ? sizeof(ULONG) : sizeof(ULONG64);
#define GET_PTR(name) p ## name = RtlFindExportedRoutineByName( module, #name )
RtlInitUnicodeString( &str, L"ntdll.dll" );
LdrGetDllHandle( NULL, 0, &str, &module );
GET_PTR( LdrSystemDllInitBlock );
module = load_64bit_module( get_cpu_dll_name() );
GET_PTR( BTCpuGetBopCode );
GET_PTR( BTCpuProcessInit );
GET_PTR( BTCpuSimulate );
module = load_64bit_module( L"wow64win.dll" );
GET_PTR( sdwhwin32 );
pBTCpuProcessInit();
module = (HMODULE)(ULONG_PTR)pLdrSystemDllInitBlock->ntdll_handle;
init_image_mapping( module );
init_syscall_table( module, 0, &ntdll_syscall_table );
*(void **)RtlFindExportedRoutineByName( module, "__wine_syscall_dispatcher" ) = pBTCpuGetBopCode();
module = load_32bit_module( L"win32u.dll" );
init_syscall_table( module, 1, psdwhwin32 );
NtUnmapViewOfSection( GetCurrentProcess(), module );
init_file_redirects();
return TRUE;
#undef GET_PTR
}
/**********************************************************************
* thread_init
*/
static void thread_init(void)
{
/* update initial context to jump to 32-bit LdrInitializeThunk (cf. 32-bit call_init_thunk) */
switch (current_machine)
{
case IMAGE_FILE_MACHINE_I386:
{
I386_CONTEXT *ctx_ptr, ctx = { CONTEXT_I386_ALL };
ULONG *stack;
NtQueryInformationThread( GetCurrentThread(), ThreadWow64Context, &ctx, sizeof(ctx), NULL );
ctx_ptr = (I386_CONTEXT *)ULongToPtr( ctx.Esp ) - 1;
*ctx_ptr = ctx;
stack = (ULONG *)ctx_ptr;
*(--stack) = 0;
*(--stack) = 0;
*(--stack) = 0;
*(--stack) = PtrToUlong( ctx_ptr );
*(--stack) = 0xdeadbabe;
ctx.Esp = PtrToUlong( stack );
ctx.Eip = pLdrSystemDllInitBlock->pLdrInitializeThunk;
NtSetInformationThread( GetCurrentThread(), ThreadWow64Context, &ctx, sizeof(ctx) );
}
break;
case IMAGE_FILE_MACHINE_ARMNT:
{
ARM_CONTEXT *ctx_ptr, ctx = { CONTEXT_ARM_ALL };
NtQueryInformationThread( GetCurrentThread(), ThreadWow64Context, &ctx, sizeof(ctx), NULL );
ctx_ptr = (ARM_CONTEXT *)ULongToPtr( ctx.Sp & ~15 ) - 1;
*ctx_ptr = ctx;
ctx.R0 = PtrToUlong( ctx_ptr );
ctx.Sp = PtrToUlong( ctx_ptr );
ctx.Pc = pLdrSystemDllInitBlock->pLdrInitializeThunk;
NtSetInformationThread( GetCurrentThread(), ThreadWow64Context, &ctx, sizeof(ctx) );
}
break;
default:
ERR( "not supported machine %x\n", current_machine );
NtTerminateProcess( GetCurrentProcess(), STATUS_INVALID_IMAGE_FORMAT );
}
}
/**********************************************************************
* free_temp_data
*/
static void free_temp_data(void)
{
struct mem_header *next, *mem;
for (mem = NtCurrentTeb()->TlsSlots[WOW64_TLS_TEMPLIST]; mem; mem = next)
{
next = mem->next;
RtlFreeHeap( GetProcessHeap(), 0, mem );
}
NtCurrentTeb()->TlsSlots[WOW64_TLS_TEMPLIST] = NULL;
}
/**********************************************************************
* syscall_filter
*/
static LONG CALLBACK syscall_filter( EXCEPTION_POINTERS *ptrs )
{
switch (ptrs->ExceptionRecord->ExceptionCode)
{
case STATUS_INVALID_HANDLE:
Wow64PassExceptionToGuest( ptrs );
break;
}
return EXCEPTION_EXECUTE_HANDLER;
}
/**********************************************************************
* Wow64SystemServiceEx (wow64.@)
*/
NTSTATUS WINAPI Wow64SystemServiceEx( UINT num, UINT *args )
{
NTSTATUS status;
UINT id = num & 0xfff;
const SYSTEM_SERVICE_TABLE *table = &syscall_tables[(num >> 12) & 3];
if (id >= table->ServiceLimit || !table->ServiceTable[id])
{
ERR( "unsupported syscall %04x\n", num );
return STATUS_INVALID_SYSTEM_SERVICE;
}
__TRY
{
syscall_thunk thunk = (syscall_thunk)table->ServiceTable[id];
status = thunk( args );
}
__EXCEPT( syscall_filter )
{
status = GetExceptionCode();
}
__ENDTRY;
free_temp_data();
return status;
}
/**********************************************************************
* Wow64AllocateTemp (wow64.@)
*
* FIXME: probably not 100% compatible.
*/
void * WINAPI Wow64AllocateTemp( SIZE_T size )
{
struct mem_header *mem;
if (!(mem = RtlAllocateHeap( GetProcessHeap(), 0, offsetof( struct mem_header, data[size] ))))
return NULL;
mem->next = NtCurrentTeb()->TlsSlots[WOW64_TLS_TEMPLIST];
NtCurrentTeb()->TlsSlots[WOW64_TLS_TEMPLIST] = mem;
return mem->data;
}
/**********************************************************************
* Wow64ApcRoutine (wow64.@)
*/
void WINAPI Wow64ApcRoutine( ULONG_PTR arg1, ULONG_PTR arg2, ULONG_PTR arg3, CONTEXT *context )
{
NTSTATUS retval;
#ifdef __x86_64__
retval = context->Rax;
#elif defined(__aarch64__)
retval = context->X0;
#endif
/* cf. 32-bit call_user_apc_dispatcher */
switch (current_machine)
{
case IMAGE_FILE_MACHINE_I386:
{
struct apc_stack_layout
{
ULONG ret;
ULONG context_ptr;
ULONG arg1;
ULONG arg2;
ULONG arg3;
ULONG func;
I386_CONTEXT context;
} *stack;
I386_CONTEXT ctx = { CONTEXT_I386_FULL };
NtQueryInformationThread( GetCurrentThread(), ThreadWow64Context, &ctx, sizeof(ctx), NULL );
stack = (struct apc_stack_layout *)ULongToPtr( ctx.Esp & ~3 ) - 1;
stack->context_ptr = PtrToUlong( &stack->context );
stack->func = arg1 >> 32;
stack->arg1 = arg1;
stack->arg2 = arg2;
stack->arg3 = arg3;
stack->context = ctx;
stack->context.Eax = retval;
ctx.Esp = PtrToUlong( stack );
ctx.Eip = pLdrSystemDllInitBlock->pKiUserApcDispatcher;
NtSetInformationThread( GetCurrentThread(), ThreadWow64Context, &ctx, sizeof(ctx) );
}
break;
case IMAGE_FILE_MACHINE_ARMNT:
{
struct apc_stack_layout
{
ULONG func;
ULONG align[3];
ARM_CONTEXT context;
} *stack;
ARM_CONTEXT ctx = { CONTEXT_ARM_FULL };
NtQueryInformationThread( GetCurrentThread(), ThreadWow64Context, &ctx, sizeof(ctx), NULL );
stack = (struct apc_stack_layout *)ULongToPtr( ctx.Sp & ~15 ) - 1;
stack->func = arg1 >> 32;
stack->context = ctx;
stack->context.R0 = retval;
ctx.Sp = PtrToUlong( stack );
ctx.Pc = pLdrSystemDllInitBlock->pKiUserApcDispatcher;
ctx.R0 = PtrToUlong( &stack->context );
ctx.R1 = arg1;
ctx.R2 = arg2;
ctx.R3 = arg3;
NtSetInformationThread( GetCurrentThread(), ThreadWow64Context, &ctx, sizeof(ctx) );
}
break;
}
}
/**********************************************************************
* Wow64LdrpInitialize (wow64.@)
*/
void WINAPI Wow64LdrpInitialize( CONTEXT *context )
{
static RTL_RUN_ONCE init_done;
RtlRunOnceExecuteOnce( &init_done, process_init, NULL, NULL );
thread_init();
pBTCpuSimulate();
}
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