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>
28 WINE_MODREF
*ELF_CreateDummyModule( LPCSTR libname
, LPCSTR modname
)
31 PIMAGE_NT_HEADERS nth
;
32 PIMAGE_SECTION_HEADER sh
;
36 wm
=(WINE_MODREF
*)HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY
, sizeof(*wm
) );
37 wm
->type
= MODULE32_ELF
;
39 /* FIXME: hmm, order? */
40 wm
->next
= PROCESS_Current()->modref_list
;
41 PROCESS_Current()->modref_list
= wm
;
43 wm
->modname
= HEAP_strdupA( GetProcessHeap(), 0, modname
);
44 wm
->longname
= HEAP_strdupA( GetProcessHeap(), 0, libname
);
46 hmod
= (HMODULE
)HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY
,
47 sizeof(IMAGE_DOS_HEADER
) +
48 sizeof(IMAGE_NT_HEADERS
) +
49 sizeof(IMAGE_SECTION_HEADER
) + 100 );
50 dh
= (PIMAGE_DOS_HEADER
)hmod
;
51 dh
->e_magic
= IMAGE_DOS_SIGNATURE
;
52 dh
->e_lfanew
= sizeof(IMAGE_DOS_HEADER
);
53 nth
= PE_HEADER(hmod
);
54 nth
->Signature
= IMAGE_NT_SIGNATURE
;
55 nth
->FileHeader
.Machine
= IMAGE_FILE_MACHINE_I386
;
56 nth
->FileHeader
.NumberOfSections
= 1;
57 nth
->FileHeader
.SizeOfOptionalHeader
= sizeof(IMAGE_OPTIONAL_HEADER
);
58 nth
->FileHeader
.Characteristics
=
59 IMAGE_FILE_RELOCS_STRIPPED
|IMAGE_FILE_LINE_NUMS_STRIPPED
|
60 IMAGE_FILE_LOCAL_SYMS_STRIPPED
|IMAGE_FILE_32BIT_MACHINE
|
61 IMAGE_FILE_DLL
|IMAGE_FILE_DEBUG_STRIPPED
;
62 nth
->OptionalHeader
.Magic
= IMAGE_NT_OPTIONAL_HDR_MAGIC
;
63 nth
->OptionalHeader
.SizeOfCode
= 0;
64 nth
->OptionalHeader
.SizeOfInitializedData
= 0;
65 nth
->OptionalHeader
.SizeOfUninitializedData
= 0;
66 nth
->OptionalHeader
.AddressOfEntryPoint
= 0;
67 nth
->OptionalHeader
.BaseOfCode
= 0;
68 nth
->OptionalHeader
.MajorOperatingSystemVersion
= 4;
69 nth
->OptionalHeader
.MajorImageVersion
= 4;
70 nth
->OptionalHeader
.SizeOfImage
= 0;
71 nth
->OptionalHeader
.SizeOfHeaders
= 0;
72 nth
->OptionalHeader
.Subsystem
= IMAGE_SUBSYSTEM_NATIVE
;
73 nth
->OptionalHeader
.DllCharacteristics
= 0;
74 nth
->OptionalHeader
.NumberOfRvaAndSizes
= 0;
76 /* allocate one code section that crosses the whole process range
77 * (we could find out from internal tables ... hmm )
79 sh
=(PIMAGE_SECTION_HEADER
)(nth
+1);
80 strcpy(sh
->Name
,".text");
81 sh
->Misc
.VirtualSize
= 0x7fffffff;
82 sh
->VirtualAddress
= 0x42; /* so snoop can use it ... */
83 sh
->SizeOfRawData
= 0x7fffffff;
84 sh
->PointerToRawData
= 0;
85 sh
->Characteristics
= IMAGE_SCN_CNT_CODE
|IMAGE_SCN_CNT_INITIALIZED_DATA
|IMAGE_SCN_MEM_EXECUTE
|IMAGE_SCN_MEM_READ
;
91 #if defined(HAVE_LIBDL) && defined(HAVE_DLFCN_H)
93 #define UNIX_DLL_ENDING "so"
99 HMODULE
ELF_LoadLibraryExA( LPCSTR libname
, HANDLE hf
, DWORD flags
)
102 char *modname
,*s
,*t
,*x
;
105 t
= HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY
,
106 strlen(libname
) + strlen("lib.so") + 1 );
108 /* copy path to tempvar ... */
109 s
=strrchr(libname
,'/');
111 s
=strrchr(libname
,'\\');
113 strncpy(t
,libname
,s
-libname
+1);
114 t
[s
-libname
+1]= '\0';
118 /* append "lib" foo ".so" */
124 if (!strcasecmp(s
,".dll")) {
125 strcpy(s
+1,UNIX_DLL_ENDING
);
131 /* FIXME: make UNIX filename from DOS fn? */
133 /* ... and open it */
134 dlhandle
= dlopen(t
,RTLD_NOW
);
136 HeapFree( GetProcessHeap(), 0, t
);
140 wm
= ELF_CreateDummyModule( t
, modname
);
141 wm
->binfmt
.elf
.dlhandle
= dlhandle
;
143 SNOOP_RegisterDLL(wm
->module
,libname
,STUBSIZE
/sizeof(ELF_STDCALL_STUB
));
147 FARPROC
ELF_FindExportedFunction( WINE_MODREF
*wm
, LPCSTR funcName
)
151 ELF_STDCALL_STUB
*stub
;
153 assert(wm
->type
== MODULE32_ELF
);
154 if (!HIWORD(funcName
)) {
155 ERR(win32
,"Can't import from UNIX dynamic libs by ordinal, sorry.\n");
158 fun
= dlsym(wm
->binfmt
.elf
.dlhandle
,funcName
);
159 /* we sometimes have an excess '_' at the beginning of the name */
160 if (!fun
&& (funcName
[0]=='_')) {
162 fun
= dlsym(wm
->binfmt
.elf
.dlhandle
,funcName
);
165 /* Function@nrofargs usually marks a stdcall function
166 * with nrofargs bytes that are popped at the end
168 if (strchr(funcName
,'@')) {
169 LPSTR t
,fn
= HEAP_strdupA( GetProcessHeap(), 0, funcName
);
174 sscanf(t
+1,"%d",&nrofargs
);
175 fun
= dlsym(wm
->binfmt
.elf
.dlhandle
,fn
);
176 HeapFree( GetProcessHeap(), 0, fn
);
179 /* We sometimes have Win32 dlls implemented using stdcall but UNIX
180 * dlls using cdecl. If we find out the number of args the function
181 * uses, we remove them from the stack using two small stubs.
183 if (!wm
->binfmt
.elf
.stubs
) {
184 /* one page should suffice */
185 wm
->binfmt
.elf
.stubs
= VirtualAlloc(NULL
,STUBSIZE
,MEM_COMMIT
|MEM_RESERVE
,PAGE_EXECUTE_READWRITE
);
186 memset(wm
->binfmt
.elf
.stubs
,0,STUBSIZE
);
188 stub
= wm
->binfmt
.elf
.stubs
;
189 for (i
=0;i
<STUBSIZE
/sizeof(ELF_STDCALL_STUB
);i
++) {
192 if (stub
->origfun
== (DWORD
)fun
)
196 if (i
==STUBSIZE
/sizeof(ELF_STDCALL_STUB
)) {
197 ERR(win32
,"please report, that there are not enough slots for stdcall stubs in the ELF loader.\n");
198 assert(i
<STUBSIZE
/sizeof(ELF_STDCALL_STUB
));
201 stub
->origfun
=(DWORD
)fun
; /* just a marker */
203 if (fun
&& nrofargs
) { /* we don't need it for 0 args */
204 /* Selfmodifying entry/return stub for stdcall -> cdecl
206 * - Pop returnaddress directly into our return code
207 * popl <into code below>
208 * - Replace it by pointer to start of our returncode
210 * - And call the original function
212 * - Remove the arguments no longer needed
213 * newret: add esp, <nrofargs>
214 * - Push the original returnvalue on the stack
215 * pushl <poppedvalue>
216 * - And return to it.
220 /* FIXME: The function stub is not reentrant. */
222 ((LPBYTE
)&(stub
->popl
))[0] = 0x8f;
223 ((LPBYTE
)&(stub
->popl
))[1] = 0x05;
224 stub
->addr_popped
= (DWORD
)&(stub
->oldret
);
226 stub
->newret
= (DWORD
)&(stub
->addesp
);
228 stub
->origfun
= (DWORD
)fun
;
230 ((LPBYTE
)&(stub
->addesp
))[0]=0x83;
231 ((LPBYTE
)&(stub
->addesp
))[1]=0xc4;
232 stub
->nrofargs
= nrofargs
;
234 /* filled out by entrycode */
235 stub
->oldret
= 0xdeadbeef;
240 FIXME(win32
,"function %s not found: %s\n",funcName
,dlerror());
243 fun
= SNOOP_GetProcAddress(wm
->module
,funcName
,stub
-wm
->binfmt
.elf
.stubs
,fun
);
248 HMODULE
ELF_LoadLibraryExA( LPCSTR libname
, HANDLE hf
, DWORD flags
)
252 FARPROC
ELF_FindExportedFunction( WINE_MODREF
*wm
, LPCSTR funcName
)