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wine-wine/dlls/ntdll/unix/loader.c

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/*
* Unix interface for loader functions
*
* Copyright (C) 2020 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
*/
#if 0
#pragma makedep unix
#endif
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif
#ifdef HAVE_SYS_UTSNAME_H
#include <sys/utsname.h>
#endif
#ifdef __APPLE__
# include <CoreFoundation/CoreFoundation.h>
# define LoadResource MacLoadResource
# define GetCurrentThread MacGetCurrentThread
# include <CoreServices/CoreServices.h>
# undef LoadResource
# undef GetCurrentThread
# include <pthread.h>
# include <mach-o/getsect.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "windef.h"
#include "winnt.h"
#include "winternl.h"
#include "unix_private.h"
#include "wine/library.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
extern IMAGE_NT_HEADERS __wine_spec_nt_header;
extern void CDECL __wine_set_unix_funcs( int version, const struct unix_funcs *funcs );
static inline void *get_rva( const IMAGE_NT_HEADERS *nt, ULONG_PTR addr )
{
return (BYTE *)nt + addr;
}
/* adjust an array of pointers to make them into RVAs */
static inline void fixup_rva_ptrs( void *array, BYTE *base, unsigned int count )
{
BYTE **src = array;
DWORD *dst = array;
for ( ; count; count--, src++, dst++) *dst = *src ? *src - base : 0;
}
/* fixup an array of RVAs by adding the specified delta */
static inline void fixup_rva_dwords( DWORD *ptr, int delta, unsigned int count )
{
for ( ; count; count--, ptr++) if (*ptr) *ptr += delta;
}
/* fixup an array of name/ordinal RVAs by adding the specified delta */
static inline void fixup_rva_names( UINT_PTR *ptr, int delta )
{
for ( ; *ptr; ptr++) if (!(*ptr & IMAGE_ORDINAL_FLAG)) *ptr += delta;
}
/* fixup RVAs in the resource directory */
static void fixup_so_resources( IMAGE_RESOURCE_DIRECTORY *dir, BYTE *root, int delta )
{
IMAGE_RESOURCE_DIRECTORY_ENTRY *entry = (IMAGE_RESOURCE_DIRECTORY_ENTRY *)(dir + 1);
unsigned int i;
for (i = 0; i < dir->NumberOfNamedEntries + dir->NumberOfIdEntries; i++, entry++)
{
void *ptr = root + entry->u2.s2.OffsetToDirectory;
if (entry->u2.s2.DataIsDirectory) fixup_so_resources( ptr, root, delta );
else fixup_rva_dwords( &((IMAGE_RESOURCE_DATA_ENTRY *)ptr)->OffsetToData, delta, 1 );
}
}
/*********************************************************************
* get_version
*/
const char * CDECL get_version(void)
{
return PACKAGE_VERSION;
}
/*********************************************************************
* get_build_id
*/
const char * CDECL get_build_id(void)
{
extern const char wine_build[];
return wine_build;
}
/*********************************************************************
* get_host_version
*/
void CDECL get_host_version( const char **sysname, const char **release )
{
#ifdef HAVE_SYS_UTSNAME_H
static struct utsname buf;
static BOOL init_done;
if (!init_done)
{
uname( &buf );
init_done = TRUE;
}
if (sysname) *sysname = buf.sysname;
if (release) *release = buf.release;
#else
if (sysname) *sysname = "";
if (release) *release = "";
#endif
}
/*************************************************************************
* map_so_dll
*
* Map a builtin dll in memory and fixup RVAs.
*/
static NTSTATUS CDECL map_so_dll( const IMAGE_NT_HEADERS *nt_descr, HMODULE module )
{
static const char builtin_signature[32] = "Wine builtin DLL";
IMAGE_DATA_DIRECTORY *dir;
IMAGE_DOS_HEADER *dos;
IMAGE_NT_HEADERS *nt;
IMAGE_SECTION_HEADER *sec;
BYTE *addr = (BYTE *)module;
DWORD code_start, code_end, data_start, data_end, align_mask;
int delta, nb_sections = 2; /* code + data */
unsigned int i;
DWORD size = (sizeof(IMAGE_DOS_HEADER)
+ sizeof(builtin_signature)
+ sizeof(IMAGE_NT_HEADERS)
+ nb_sections * sizeof(IMAGE_SECTION_HEADER));
if (wine_anon_mmap( addr, size, PROT_READ | PROT_WRITE, MAP_FIXED ) != addr) return STATUS_NO_MEMORY;
dos = (IMAGE_DOS_HEADER *)addr;
nt = (IMAGE_NT_HEADERS *)((BYTE *)(dos + 1) + sizeof(builtin_signature));
sec = (IMAGE_SECTION_HEADER *)(nt + 1);
/* build the DOS and NT headers */
dos->e_magic = IMAGE_DOS_SIGNATURE;
dos->e_cblp = 0x90;
dos->e_cp = 3;
dos->e_cparhdr = (sizeof(*dos) + 0xf) / 0x10;
dos->e_minalloc = 0;
dos->e_maxalloc = 0xffff;
dos->e_ss = 0x0000;
dos->e_sp = 0x00b8;
dos->e_lfanew = sizeof(*dos) + sizeof(builtin_signature);
*nt = *nt_descr;
delta = (const BYTE *)nt_descr - addr;
align_mask = nt->OptionalHeader.SectionAlignment - 1;
code_start = (size + align_mask) & ~align_mask;
data_start = delta & ~align_mask;
#ifdef __APPLE__
{
Dl_info dli;
unsigned long data_size;
/* need the mach_header, not the PE header, to give to getsegmentdata(3) */
dladdr(addr, &dli);
code_end = getsegmentdata(dli.dli_fbase, "__DATA", &data_size) - addr;
data_end = (code_end + data_size + align_mask) & ~align_mask;
}
#else
code_end = data_start;
data_end = (nt->OptionalHeader.SizeOfImage + delta + align_mask) & ~align_mask;
#endif
fixup_rva_ptrs( &nt->OptionalHeader.AddressOfEntryPoint, addr, 1 );
nt->FileHeader.NumberOfSections = nb_sections;
nt->OptionalHeader.BaseOfCode = code_start;
#ifndef _WIN64
nt->OptionalHeader.BaseOfData = data_start;
#endif
nt->OptionalHeader.SizeOfCode = code_end - code_start;
nt->OptionalHeader.SizeOfInitializedData = data_end - data_start;
nt->OptionalHeader.SizeOfUninitializedData = 0;
nt->OptionalHeader.SizeOfImage = data_end;
nt->OptionalHeader.ImageBase = (ULONG_PTR)addr;
/* build the code section */
memcpy( sec->Name, ".text", sizeof(".text") );
sec->SizeOfRawData = code_end - code_start;
sec->Misc.VirtualSize = sec->SizeOfRawData;
sec->VirtualAddress = code_start;
sec->PointerToRawData = code_start;
sec->Characteristics = (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ);
sec++;
/* build the data section */
memcpy( sec->Name, ".data", sizeof(".data") );
sec->SizeOfRawData = data_end - data_start;
sec->Misc.VirtualSize = sec->SizeOfRawData;
sec->VirtualAddress = data_start;
sec->PointerToRawData = data_start;
sec->Characteristics = (IMAGE_SCN_CNT_INITIALIZED_DATA |
IMAGE_SCN_MEM_WRITE | IMAGE_SCN_MEM_READ);
sec++;
for (i = 0; i < nt->OptionalHeader.NumberOfRvaAndSizes; i++)
fixup_rva_dwords( &nt->OptionalHeader.DataDirectory[i].VirtualAddress, delta, 1 );
/* build the import directory */
dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_IMPORT_DIRECTORY];
if (dir->Size)
{
IMAGE_IMPORT_DESCRIPTOR *imports = (IMAGE_IMPORT_DESCRIPTOR *)(addr + dir->VirtualAddress);
while (imports->Name)
{
fixup_rva_dwords( &imports->u.OriginalFirstThunk, delta, 1 );
fixup_rva_dwords( &imports->Name, delta, 1 );
fixup_rva_dwords( &imports->FirstThunk, delta, 1 );
if (imports->u.OriginalFirstThunk)
fixup_rva_names( (UINT_PTR *)(addr + imports->u.OriginalFirstThunk), delta );
if (imports->FirstThunk)
fixup_rva_names( (UINT_PTR *)(addr + imports->FirstThunk), delta );
imports++;
}
}
/* build the resource directory */
dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_RESOURCE_DIRECTORY];
if (dir->Size)
{
void *ptr = addr + dir->VirtualAddress;
fixup_so_resources( ptr, ptr, delta );
}
/* build the export directory */
dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_EXPORT_DIRECTORY];
if (dir->Size)
{
IMAGE_EXPORT_DIRECTORY *exports = (IMAGE_EXPORT_DIRECTORY *)(addr + dir->VirtualAddress);
fixup_rva_dwords( &exports->Name, delta, 1 );
fixup_rva_dwords( &exports->AddressOfFunctions, delta, 1 );
fixup_rva_dwords( &exports->AddressOfNames, delta, 1 );
fixup_rva_dwords( &exports->AddressOfNameOrdinals, delta, 1 );
fixup_rva_dwords( (DWORD *)(addr + exports->AddressOfNames), delta, exports->NumberOfNames );
fixup_rva_ptrs( addr + exports->AddressOfFunctions, addr, exports->NumberOfFunctions );
}
return STATUS_SUCCESS;
}
static const IMAGE_EXPORT_DIRECTORY *get_export_dir( HMODULE module )
{
const IMAGE_DOS_HEADER *dos = (const IMAGE_DOS_HEADER *)module;
const IMAGE_NT_HEADERS *nt;
DWORD addr;
if (dos->e_magic != IMAGE_DOS_SIGNATURE) return NULL;
nt = (IMAGE_NT_HEADERS *)((const BYTE *)dos + dos->e_lfanew);
if (nt->Signature != IMAGE_NT_SIGNATURE) return NULL;
addr = nt->OptionalHeader.DataDirectory[IMAGE_FILE_EXPORT_DIRECTORY].VirtualAddress;
if (!addr) return NULL;
return (IMAGE_EXPORT_DIRECTORY *)((BYTE *)module + addr);
}
static ULONG_PTR find_ordinal_export( HMODULE module, const IMAGE_EXPORT_DIRECTORY *exports, DWORD ordinal )
{
const DWORD *functions = (const DWORD *)((BYTE *)module + exports->AddressOfFunctions);
if (ordinal >= exports->NumberOfFunctions) return 0;
if (!functions[ordinal]) return 0;
return (ULONG_PTR)module + functions[ordinal];
}
static ULONG_PTR find_named_export( HMODULE module, const IMAGE_EXPORT_DIRECTORY *exports,
const IMAGE_IMPORT_BY_NAME *name )
{
const WORD *ordinals = (const WORD *)((BYTE *)module + exports->AddressOfNameOrdinals);
const DWORD *names = (const DWORD *)((BYTE *)module + exports->AddressOfNames);
int min = 0, max = exports->NumberOfNames - 1;
/* first check the hint */
if (name->Hint <= max)
{
char *ename = (char *)module + names[name->Hint];
if (!strcmp( ename, (char *)name->Name ))
return find_ordinal_export( module, exports, ordinals[name->Hint] );
}
/* then do a binary search */
while (min <= max)
{
int res, pos = (min + max) / 2;
char *ename = (char *)module + names[pos];
if (!(res = strcmp( ename, (char *)name->Name )))
return find_ordinal_export( module, exports, ordinals[pos] );
if (res > 0) max = pos - 1;
else min = pos + 1;
}
return 0;
}
static void fixup_ntdll_imports( const IMAGE_NT_HEADERS *nt, HMODULE ntdll_module )
{
const IMAGE_EXPORT_DIRECTORY *ntdll_exports = get_export_dir( ntdll_module );
const IMAGE_IMPORT_DESCRIPTOR *descr;
const IMAGE_THUNK_DATA *import_list;
IMAGE_THUNK_DATA *thunk_list;
assert( ntdll_exports );
descr = get_rva( nt, nt->OptionalHeader.DataDirectory[IMAGE_FILE_IMPORT_DIRECTORY].VirtualAddress );
while (descr->Name)
{
/* ntdll must be the only import */
assert( !strcmp( get_rva( nt, descr->Name ), "ntdll.dll" ));
thunk_list = get_rva( nt, (DWORD)descr->FirstThunk );
if (descr->u.OriginalFirstThunk)
import_list = get_rva( nt, (DWORD)descr->u.OriginalFirstThunk );
else
import_list = thunk_list;
while (import_list->u1.Ordinal)
{
if (IMAGE_SNAP_BY_ORDINAL( import_list->u1.Ordinal ))
{
int ordinal = IMAGE_ORDINAL( import_list->u1.Ordinal ) - ntdll_exports->Base;
thunk_list->u1.Function = find_ordinal_export( ntdll_module, ntdll_exports, ordinal );
if (!thunk_list->u1.Function) ERR( "ordinal %u not found\n", ordinal );
}
else /* import by name */
{
IMAGE_IMPORT_BY_NAME *pe_name = get_rva( nt, import_list->u1.AddressOfData );
thunk_list->u1.Function = find_named_export( ntdll_module, ntdll_exports, pe_name );
if (!thunk_list->u1.Function) ERR( "%s not found\n", pe_name->Name );
}
import_list++;
thunk_list++;
}
descr++;
}
}
/***********************************************************************
* load_ntdll
*/
static HMODULE load_ntdll(void)
{
const IMAGE_NT_HEADERS *nt;
HMODULE module;
Dl_info info;
char *name;
void *handle;
if (!dladdr( load_ntdll, &info ))
{
ERR( "cannot get path to ntdll.so\n" );
exit(1);
}
name = malloc( strlen(info.dli_fname) + 5 );
strcpy( name, info.dli_fname );
strcpy( name + strlen(info.dli_fname) - 3, ".dll.so" );
if (!(handle = dlopen( name, RTLD_NOW )))
{
ERR( "failed to load %s: %s\n", name, dlerror() );
exit(1);
}
if (!(nt = dlsym( handle, "__wine_spec_nt_header" )))
{
ERR( "NT header not found in %s (too old?)\n", name );
exit(1);
}
free( name );
module = (HMODULE)((nt->OptionalHeader.ImageBase + 0xffff) & ~0xffff);
map_so_dll( nt, module );
return module;
}
/***********************************************************************
* unix_funcs
*/
static struct unix_funcs unix_funcs =
{
get_version,
get_build_id,
get_host_version,
map_so_dll,
mmap_add_reserved_area,
mmap_remove_reserved_area,
mmap_is_in_reserved_area,
mmap_enum_reserved_areas,
dbg_init,
__wine_dbg_get_channel_flags,
__wine_dbg_strdup,
__wine_dbg_output,
__wine_dbg_header,
};
#ifdef __APPLE__
struct apple_stack_info
{
void *stack;
size_t desired_size;
};
static void *apple_wine_thread( void *arg )
{
__wine_set_unix_funcs( NTDLL_UNIXLIB_VERSION, &unix_funcs );
return NULL;
}
/***********************************************************************
* apple_alloc_thread_stack
*
* Callback for mmap_enum_reserved_areas to allocate space for
* the secondary thread's stack.
*/
#ifndef _WIN64
static int CDECL apple_alloc_thread_stack( void *base, size_t size, void *arg )
{
struct apple_stack_info *info = arg;
/* For mysterious reasons, putting the thread stack at the very top
* of the address space causes subsequent execs to fail, even on the
* child side of a fork. Avoid the top 16MB. */
char * const limit = (char*)0xff000000;
if ((char *)base >= limit) return 0;
if (size > limit - (char*)base)
size = limit - (char*)base;
if (size < info->desired_size) return 0;
info->stack = wine_anon_mmap( (char *)base + size - info->desired_size,
info->desired_size, PROT_READ|PROT_WRITE, MAP_FIXED );
return (info->stack != (void *)-1);
}
#endif
/***********************************************************************
* apple_create_wine_thread
*
* Spin off a secondary thread to complete Wine initialization, leaving
* the original thread for the Mac frameworks.
*
* Invoked as a CFRunLoopSource perform callback.
*/
static void apple_create_wine_thread( void *arg )
{
int success = 0;
pthread_t thread;
pthread_attr_t attr;
if (!pthread_attr_init( &attr ))
{
#ifndef _WIN64
struct apple_stack_info info;
/* Try to put the new thread's stack in the reserved area. If this
* fails, just let it go wherever. It'll be a waste of space, but we
* can go on. */
if (!pthread_attr_getstacksize( &attr, &info.desired_size ) &&
mmap_enum_reserved_areas( apple_alloc_thread_stack, &info, 1 ))
{
mmap_remove_reserved_area( info.stack, info.desired_size, 0 );
pthread_attr_setstackaddr( &attr, (char*)info.stack + info.desired_size );
}
#endif
if (!pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE ) &&
!pthread_create( &thread, &attr, apple_wine_thread, NULL ))
success = 1;
pthread_attr_destroy( &attr );
}
if (!success) exit(1);
}
/***********************************************************************
* apple_main_thread
*
* Park the process's original thread in a Core Foundation run loop for
* use by the Mac frameworks, especially receiving and handling
* distributed notifications. Spin off a new thread for the rest of the
* Wine initialization.
*/
static void apple_main_thread(void)
{
CFRunLoopSourceContext source_context = { 0 };
CFRunLoopSourceRef source;
if (!pthread_main_np()) return;
/* Multi-processing Services can get confused about the main thread if the
* first time it's used is on a secondary thread. Use it here to make sure
* that doesn't happen. */
MPTaskIsPreemptive(MPCurrentTaskID());
/* Give ourselves the best chance of having the distributed notification
* center scheduled on this thread's run loop. In theory, it's scheduled
* in the first thread to ask for it. */
CFNotificationCenterGetDistributedCenter();
/* We use this run loop source for two purposes. First, a run loop exits
* if it has no more sources scheduled. So, we need at least one source
* to keep the run loop running. Second, although it's not critical, it's
* preferable for the Wine initialization to not proceed until we know
* the run loop is running. So, we signal our source immediately after
* adding it and have its callback spin off the Wine thread. */
source_context.perform = apple_create_wine_thread;
source = CFRunLoopSourceCreate( NULL, 0, &source_context );
CFRunLoopAddSource( CFRunLoopGetCurrent(), source, kCFRunLoopCommonModes );
CFRunLoopSourceSignal( source );
CFRelease( source );
CFRunLoopRun(); /* Should never return, except on error. */
}
#endif /* __APPLE__ */
#ifdef __ANDROID__
static int pre_exec(void)
{
#if defined(__i386__) || defined(__x86_64__)
return 1; /* we have a preloader */
#else
return 0; /* no exec needed */
#endif
}
#elif defined(__linux__) && (defined(__i386__) || defined(__arm__))
static void check_vmsplit( void *stack )
{
if (stack < (void *)0x80000000)
{
/* if the stack is below 0x80000000, assume we can safely try a munmap there */
if (munmap( (void *)0x80000000, 1 ) == -1 && errno == EINVAL)
ERR( "Warning: memory above 0x80000000 doesn't seem to be accessible.\n"
"Wine requires a 3G/1G user/kernel memory split to work properly.\n" );
}
}
static void set_max_limit( int limit )
{
struct rlimit rlimit;
if (!getrlimit( limit, &rlimit ))
{
rlimit.rlim_cur = rlimit.rlim_max;
setrlimit( limit, &rlimit );
}
}
static int pre_exec(void)
{
int temp;
check_vmsplit( &temp );
set_max_limit( RLIMIT_AS );
#ifdef __i386__
return 1; /* we have a preloader on x86 */
#else
return 0;
#endif
}
#elif defined(__linux__) && (defined(__x86_64__) || defined(__aarch64__))
static int pre_exec(void)
{
return 1; /* we have a preloader on x86-64/arm64 */
}
#elif defined(__APPLE__) && (defined(__i386__) || defined(__x86_64__))
static int pre_exec(void)
{
return 1; /* we have a preloader */
}
#elif (defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__DragonFly__))
static int pre_exec(void)
{
struct rlimit rl;
rl.rlim_cur = 0x02000000;
rl.rlim_max = 0x02000000;
setrlimit( RLIMIT_DATA, &rl );
return 1;
}
#else
static int pre_exec(void)
{
return 0; /* no exec needed */
}
#endif
/***********************************************************************
* check_command_line
*
* Check if command line is one that needs to be handled specially.
*/
static void check_command_line( int argc, char *argv[] )
{
static const char usage[] =
"Usage: wine PROGRAM [ARGUMENTS...] Run the specified program\n"
" wine --help Display this help and exit\n"
" wine --version Output version information and exit";
if (argc <= 1)
{
fprintf( stderr, "%s\n", usage );
exit(1);
}
if (!strcmp( argv[1], "--help" ))
{
printf( "%s\n", usage );
exit(0);
}
if (!strcmp( argv[1], "--version" ))
{
printf( "%s\n", get_build_id() );
exit(0);
}
}
/***********************************************************************
* __wine_main
*
* Main entry point called by the wine loader.
*/
void __wine_main( int argc, char *argv[], char *envp[] )
{
extern int __wine_main_argc;
extern char **__wine_main_argv;
extern char **__wine_main_environ;
HMODULE module;
wine_init_argv0_path( argv[0] );
if (!getenv( "WINELOADERNOEXEC" )) /* first time around */
{
static char noexec[] = "WINELOADERNOEXEC=1";
putenv( noexec );
check_command_line( argc, argv );
if (pre_exec())
{
wine_exec_wine_binary( NULL, argv, getenv( "WINELOADER" ));
ERR( "could not exec the wine loader\n" );
exit(1);
}
}
__wine_main_argc = argc;
__wine_main_argv = argv;
__wine_main_environ = envp;
virtual_init();
module = load_ntdll();
fixup_ntdll_imports( &__wine_spec_nt_header, module );
#ifdef __APPLE__
apple_main_thread();
#endif
__wine_set_unix_funcs( NTDLL_UNIXLIB_VERSION, &unix_funcs );
}
static int add_area( void *base, size_t size, void *arg )
{
mmap_add_reserved_area( base, size );
return 0;
}
/***********************************************************************
* __wine_init_unix_lib
*
* Lib entry point called by ntdll.dll.so if not yet initialized.
*/
NTSTATUS __cdecl __wine_init_unix_lib( HMODULE module, const void *ptr_in, void *ptr_out )
{
const IMAGE_NT_HEADERS *nt = ptr_in;
map_so_dll( nt, module );
fixup_ntdll_imports( &__wine_spec_nt_header, module );
*(struct unix_funcs **)ptr_out = &unix_funcs;
wine_mmap_enum_reserved_areas( add_area, NULL, 0 );
return STATUS_SUCCESS;
}
BOOL WINAPI DECLSPEC_HIDDEN DllMain( HINSTANCE inst, DWORD reason, LPVOID reserved )
{
if (reason == DLL_PROCESS_ATTACH) LdrDisableThreadCalloutsForDll( inst );
return TRUE;
}
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