4 * Currently only supports stuff using the dl* API.
6 * Copyright 1998 Marcus Meissner
8 * FIXME: Small reentrancy problem.
9 * IDEA(s): could be used to split up shell32,comctl32...
17 #include <sys/types.h>
24 #include "debugtools.h"
28 DEFAULT_DEBUG_CHANNEL(win32
);
33 WORD popl WINE_PACKED
; /* 0x8f 0x05 */
34 DWORD addr_popped WINE_PACKED
;/* ... */
35 BYTE pushl1 WINE_PACKED
; /* 0x68 */
36 DWORD newret WINE_PACKED
; /* ... */
37 BYTE pushl2 WINE_PACKED
; /* 0x68 */
38 DWORD origfun WINE_PACKED
; /* original function */
39 BYTE ret1 WINE_PACKED
; /* 0xc3 */
40 WORD addesp WINE_PACKED
; /* 0x83 0xc4 */
41 BYTE nrofargs WINE_PACKED
; /* nr of arguments to add esp, */
42 BYTE pushl3 WINE_PACKED
; /* 0x68 */
43 DWORD oldret WINE_PACKED
; /* Filled out from popl above */
44 BYTE ret2 WINE_PACKED
; /* 0xc3 */
47 #define UNIX_DLL_ENDING "so"
50 #define STUBOFFSET (sizeof(IMAGE_DOS_HEADER) + \
51 sizeof(IMAGE_NT_HEADERS) + \
52 sizeof(IMAGE_SECTION_HEADER))
56 static FARPROC
ELF_FindExportedFunction( WINE_MODREF
*wm
, LPCSTR funcName
, BOOL snoop
);
58 static HMODULE
ELF_CreateDummyModule( LPCSTR libname
, LPCSTR modname
)
61 PIMAGE_NT_HEADERS nth
;
62 PIMAGE_SECTION_HEADER sh
;
65 hmod
= (HMODULE
)HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY
,
66 sizeof(IMAGE_DOS_HEADER
) +
67 sizeof(IMAGE_NT_HEADERS
) +
68 sizeof(IMAGE_SECTION_HEADER
) + STUBSIZE
);
69 dh
= (PIMAGE_DOS_HEADER
)hmod
;
70 dh
->e_magic
= IMAGE_DOS_SIGNATURE
;
71 dh
->e_lfanew
= sizeof(IMAGE_DOS_HEADER
);
72 nth
= PE_HEADER(hmod
);
73 nth
->Signature
= IMAGE_NT_SIGNATURE
;
74 nth
->FileHeader
.Machine
= IMAGE_FILE_MACHINE_I386
;
75 nth
->FileHeader
.NumberOfSections
= 1;
76 nth
->FileHeader
.SizeOfOptionalHeader
= sizeof(IMAGE_OPTIONAL_HEADER
);
77 nth
->FileHeader
.Characteristics
=
78 IMAGE_FILE_RELOCS_STRIPPED
|IMAGE_FILE_LINE_NUMS_STRIPPED
|
79 IMAGE_FILE_LOCAL_SYMS_STRIPPED
|IMAGE_FILE_32BIT_MACHINE
|
80 IMAGE_FILE_DLL
|IMAGE_FILE_DEBUG_STRIPPED
;
81 nth
->OptionalHeader
.Magic
= IMAGE_NT_OPTIONAL_HDR_MAGIC
;
82 nth
->OptionalHeader
.SizeOfCode
= 0;
83 nth
->OptionalHeader
.SizeOfInitializedData
= 0;
84 nth
->OptionalHeader
.SizeOfUninitializedData
= 0;
85 nth
->OptionalHeader
.AddressOfEntryPoint
= 0;
86 nth
->OptionalHeader
.BaseOfCode
= 0;
87 nth
->OptionalHeader
.MajorOperatingSystemVersion
= 4;
88 nth
->OptionalHeader
.MajorImageVersion
= 4;
89 nth
->OptionalHeader
.SizeOfImage
= 0;
90 nth
->OptionalHeader
.SizeOfHeaders
= 0;
91 nth
->OptionalHeader
.Subsystem
= IMAGE_SUBSYSTEM_NATIVE
;
92 nth
->OptionalHeader
.DllCharacteristics
= 0;
93 nth
->OptionalHeader
.NumberOfRvaAndSizes
= 0;
95 /* allocate one code section that crosses the whole process range
96 * (we could find out from internal tables ... hmm )
98 sh
=(PIMAGE_SECTION_HEADER
)(nth
+1);
99 strcpy(sh
->Name
,".text");
100 sh
->Misc
.VirtualSize
= STUBSIZE
;
101 sh
->VirtualAddress
= STUBOFFSET
; /* so snoop can use it ... */
102 sh
->SizeOfRawData
= STUBSIZE
;
103 sh
->PointerToRawData
= 0;
104 sh
->Characteristics
= IMAGE_SCN_CNT_CODE
|IMAGE_SCN_CNT_INITIALIZED_DATA
|IMAGE_SCN_MEM_EXECUTE
|IMAGE_SCN_MEM_READ
;
108 WINE_MODREF
*ELF_LoadLibraryExA( LPCSTR libname
, DWORD flags
)
112 char *modname
,*s
,*t
,*x
;
115 t
= HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY
,
116 strlen(libname
) + strlen("lib.so") + 1 );
118 /* copy path to tempvar ... */
119 s
=strrchr(libname
,'/');
121 s
=strrchr(libname
,'\\');
123 s
++; /* skip / or \ */
124 /* copy everything up to s-1 */
125 memcpy(t
,libname
,s
-libname
);
130 /* append "lib" foo ".so" */
137 if (!strcasecmp(s
,".dll")) {
138 strcpy(s
+1,UNIX_DLL_ENDING
);
144 strcat(x
,"."UNIX_DLL_ENDING
);
147 /* FIXME: make UNIX filename from DOS fn? */
149 /* ... and open it */
150 dlhandle
= ELFDLL_dlopen(t
,RTLD_NOW
);
152 HeapFree( GetProcessHeap(), 0, t
);
153 SetLastError( ERROR_FILE_NOT_FOUND
);
157 hmod
= ELF_CreateDummyModule( t
, modname
);
159 SNOOP_RegisterDLL(hmod
,libname
,STUBSIZE
/sizeof(ELF_STDCALL_STUB
));
161 wm
= PE_CreateModule( hmod
, libname
, 0, -1, FALSE
);
162 wm
->find_export
= ELF_FindExportedFunction
;
163 wm
->dlhandle
= dlhandle
;
167 static FARPROC
ELF_FindExportedFunction( WINE_MODREF
*wm
, LPCSTR funcName
, BOOL snoop
)
171 ELF_STDCALL_STUB
*stub
, *first_stub
;
173 if (!HIWORD(funcName
)) {
174 ERR("Can't import from UNIX dynamic libs by ordinal, sorry.\n");
177 fun
= dlsym(wm
->dlhandle
,funcName
);
178 /* we sometimes have an excess '_' at the beginning of the name */
179 if (!fun
&& (funcName
[0]=='_')) {
181 fun
= dlsym(wm
->dlhandle
,funcName
);
184 /* Function@nrofargs usually marks a stdcall function
185 * with nrofargs bytes that are popped at the end
187 if (strchr(funcName
,'@')) {
188 LPSTR t
,fn
= HEAP_strdupA( GetProcessHeap(), 0, funcName
);
193 sscanf(t
+1,"%d",&nrofargs
);
194 fun
= dlsym(wm
->dlhandle
,fn
);
195 HeapFree( GetProcessHeap(), 0, fn
);
198 /* We sometimes have Win32 dlls implemented using stdcall but UNIX
199 * dlls using cdecl. If we find out the number of args the function
200 * uses, we remove them from the stack using two small stubs.
202 stub
= first_stub
= (ELF_STDCALL_STUB
*)((char *)wm
->module
+ STUBOFFSET
);
203 for (i
=0;i
<STUBSIZE
/sizeof(ELF_STDCALL_STUB
);i
++) {
206 if (stub
->origfun
== (DWORD
)fun
)
210 if (i
==STUBSIZE
/sizeof(ELF_STDCALL_STUB
)) {
211 ERR("please report, that there are not enough slots for stdcall stubs in the ELF loader.\n");
212 assert(i
<STUBSIZE
/sizeof(ELF_STDCALL_STUB
));
215 stub
->origfun
=(DWORD
)fun
; /* just a marker */
217 if (fun
&& nrofargs
) { /* we don't need it for 0 args */
218 /* Selfmodifying entry/return stub for stdcall -> cdecl
220 * - Pop returnaddress directly into our return code
221 * popl <into code below>
222 * - Replace it by pointer to start of our returncode
224 * - And call the original function
226 * - Remove the arguments no longer needed
227 * newret: add esp, <nrofargs>
228 * - Push the original returnvalue on the stack
229 * pushl <poppedvalue>
230 * - And return to it.
234 /* FIXME: The function stub is not reentrant. */
236 ((LPBYTE
)&(stub
->popl
))[0] = 0x8f;
237 ((LPBYTE
)&(stub
->popl
))[1] = 0x05;
238 stub
->addr_popped
= (DWORD
)&(stub
->oldret
);
240 stub
->newret
= (DWORD
)&(stub
->addesp
);
242 stub
->origfun
= (DWORD
)fun
;
244 ((LPBYTE
)&(stub
->addesp
))[0]=0x83;
245 ((LPBYTE
)&(stub
->addesp
))[1]=0xc4;
246 stub
->nrofargs
= nrofargs
;
248 /* filled out by entrycode */
249 stub
->oldret
= 0xdeadbeef;
254 FIXME("function %s not found: %s\n",funcName
,dlerror());
257 fun
= SNOOP_GetProcAddress(wm
->module
,funcName
,stub
-first_stub
,fun
);
261 #else /* HAVE_DL_API */
263 WINE_MODREF
*ELF_LoadLibraryExA( LPCSTR libname
, DWORD flags
)
268 #endif /* HAVE_DL_API */