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Sweden-Number/relay32/relay386.c

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/*
* 386-specific Win32 relay functions
*
* Copyright 1997 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include "windef.h"
#include "winternl.h"
#include "stackframe.h"
#include "module.h"
#include "wine/unicode.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(relay);
WINE_DECLARE_DEBUG_CHANNEL(snoop);
const char **debug_relay_excludelist = NULL;
const char **debug_relay_includelist = NULL;
const char **debug_snoop_excludelist = NULL;
const char **debug_snoop_includelist = NULL;
/***********************************************************************
* build_list
*
* Build a function list from a ';'-separated string.
*/
static const char **build_list( const WCHAR *bufferW )
{
int count = 1;
char buffer[1024];
const char *p = buffer;
const char **ret;
RtlUnicodeToMultiByteN( buffer, sizeof(buffer), NULL,
bufferW, (strlenW(bufferW)+1) * sizeof(WCHAR) );
while ((p = strchr( p, ';' )))
{
count++;
p++;
}
/* allocate count+1 pointers, plus the space for a copy of the string */
if ((ret = HeapAlloc( GetProcessHeap(), 0, (count+1) * sizeof(char*) + strlen(buffer) + 1 )))
{
char *str = (char *)(ret + count + 1);
char *p = str;
strcpy( str, buffer );
count = 0;
for (;;)
{
ret[count++] = p;
if (!(p = strchr( p, ';' ))) break;
*p++ = 0;
}
ret[count++] = NULL;
}
return ret;
}
/***********************************************************************
* RELAY_InitDebugLists
*
* Build the relay include/exclude function lists.
*/
void RELAY_InitDebugLists(void)
{
OBJECT_ATTRIBUTES attr;
UNICODE_STRING name;
char buffer[1024];
HKEY hkey;
DWORD count;
WCHAR *str;
static const WCHAR configW[] = {'M','a','c','h','i','n','e','\\',
'S','o','f','t','w','a','r','e','\\',
'W','i','n','e','\\',
'W','i','n','e','\\',
'C','o','n','f','i','g','\\',
'D','e','b','u','g',0};
static const WCHAR RelayIncludeW[] = {'R','e','l','a','y','I','n','c','l','u','d','e',0};
static const WCHAR RelayExcludeW[] = {'R','e','l','a','y','E','x','c','l','u','d','e',0};
static const WCHAR SnoopIncludeW[] = {'S','n','o','o','p','I','n','c','l','u','d','e',0};
static const WCHAR SnoopExcludeW[] = {'S','n','o','o','p','E','x','c','l','u','d','e',0};
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.ObjectName = &name;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
RtlInitUnicodeString( &name, configW );
if (NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr )) return;
str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)buffer)->Data;
RtlInitUnicodeString( &name, RelayIncludeW );
if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
{
TRACE("RelayInclude = %s\n", debugstr_w(str) );
debug_relay_includelist = build_list( str );
}
RtlInitUnicodeString( &name, RelayExcludeW );
if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
{
TRACE( "RelayExclude = %s\n", debugstr_w(str) );
debug_relay_excludelist = build_list( str );
}
RtlInitUnicodeString( &name, SnoopIncludeW );
if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
{
TRACE_(snoop)( "SnoopInclude = %s\n", debugstr_w(str) );
debug_snoop_includelist = build_list( str );
}
RtlInitUnicodeString( &name, SnoopExcludeW );
if (!NtQueryValueKey( hkey, &name, KeyValuePartialInformation, buffer, sizeof(buffer), &count ))
{
TRACE_(snoop)( "SnoopExclude = %s\n", debugstr_w(str) );
debug_snoop_excludelist = build_list( str );
}
NtClose( hkey );
}
#ifdef __i386__
typedef struct
{
BYTE call; /* 0xe8 call callfrom32 (relative) */
DWORD callfrom32 WINE_PACKED; /* RELAY_CallFrom32 relative addr */
BYTE ret; /* 0xc2 ret $n or 0xc3 ret */
WORD args; /* nb of args to remove from the stack */
void *orig; /* original entry point */
DWORD argtypes; /* argument types */
} DEBUG_ENTRY_POINT;
/***********************************************************************
* check_relay_include
*
* Check if a given function must be included in the relay output.
*/
static BOOL check_relay_include( const char *module, const char *func )
{
const char **listitem;
BOOL show;
if (!debug_relay_excludelist && !debug_relay_includelist) return TRUE;
if (debug_relay_excludelist)
{
show = TRUE;
listitem = debug_relay_excludelist;
}
else
{
show = FALSE;
listitem = debug_relay_includelist;
}
for(; *listitem; listitem++)
{
char *p = strrchr( *listitem, '.' );
if (p && p > *listitem) /* check module and function */
{
int len = p - *listitem;
if (strncasecmp( *listitem, module, len-1 ) || module[len]) continue;
if (!strcmp( p + 1, func ) || !strcmp( p + 1, "*" )) return !show;
}
else /* function only */
{
if (!strcmp( *listitem, func )) return !show;
}
}
return show;
}
/***********************************************************************
* find_exported_name
*
* Find the name of an exported function.
*/
static const char *find_exported_name( const char *module,
IMAGE_EXPORT_DIRECTORY *exp, int ordinal )
{
int i;
const char *ret = NULL;
WORD *ordptr = (WORD *)(module + exp->AddressOfNameOrdinals);
for (i = 0; i < exp->NumberOfNames; i++, ordptr++)
if (*ordptr + exp->Base == ordinal) break;
if (i < exp->NumberOfNames)
ret = module + ((DWORD*)(module + exp->AddressOfNames))[i];
return ret;
}
/***********************************************************************
* get_entry_point
*
* Get the name of the DLL entry point corresponding to a relay address.
*/
static void get_entry_point( char *buffer, DEBUG_ENTRY_POINT *relay )
{
IMAGE_EXPORT_DIRECTORY *exp = NULL;
DEBUG_ENTRY_POINT *debug;
char *p, *base = NULL;
const char *name;
int ordinal = 0;
WINE_MODREF *wm;
DWORD size;
/* First find the module */
for (wm = MODULE_modref_list; wm; wm = wm->next)
{
if (!(wm->ldr.Flags & LDR_WINE_INTERNAL)) continue;
exp = RtlImageDirectoryEntryToData( wm->ldr.BaseAddress, TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT, &size );
if (!exp) continue;
debug = (DEBUG_ENTRY_POINT *)((char *)exp + size);
if (debug <= relay && relay < debug + exp->NumberOfFunctions)
{
ordinal = relay - debug;
break;
}
}
/* Now find the function */
base = (char *)wm->ldr.BaseAddress;
strcpy( buffer, base + exp->Name );
p = buffer + strlen(buffer);
if (p > buffer + 4 && !strcasecmp( p - 4, ".dll" )) p -= 4;
if ((name = find_exported_name( base, exp, ordinal + exp->Base )))
sprintf( p, ".%s", name );
else
sprintf( p, ".%ld", ordinal + exp->Base );
}
/***********************************************************************
* RELAY_PrintArgs
*/
static inline void RELAY_PrintArgs( int *args, int nb_args, unsigned int typemask )
{
while (nb_args--)
{
if ((typemask & 3) && HIWORD(*args))
{
if (typemask & 2)
DPRINTF( "%08x %s", *args, debugstr_w((LPWSTR)*args) );
else
DPRINTF( "%08x %s", *args, debugstr_a((LPCSTR)*args) );
}
else DPRINTF( "%08x", *args );
if (nb_args) DPRINTF( "," );
args++;
typemask >>= 2;
}
}
typedef LONGLONG (*LONGLONG_CPROC)();
typedef LONGLONG (WINAPI *LONGLONG_FARPROC)();
/***********************************************************************
* call_cdecl_function
*/
static LONGLONG call_cdecl_function( LONGLONG_CPROC func, int nb_args, const int *args )
{
LONGLONG ret;
switch(nb_args)
{
case 0: ret = func(); break;
case 1: ret = func(args[0]); break;
case 2: ret = func(args[0],args[1]); break;
case 3: ret = func(args[0],args[1],args[2]); break;
case 4: ret = func(args[0],args[1],args[2],args[3]); break;
case 5: ret = func(args[0],args[1],args[2],args[3],args[4]); break;
case 6: ret = func(args[0],args[1],args[2],args[3],args[4],
args[5]); break;
case 7: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6]); break;
case 8: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7]); break;
case 9: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8]); break;
case 10: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9]); break;
case 11: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10]); break;
case 12: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],
args[11]); break;
case 13: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],args[11],
args[12]); break;
case 14: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],args[11],
args[12],args[13]); break;
case 15: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],args[11],
args[12],args[13],args[14]); break;
case 16: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],args[11],
args[12],args[13],args[14],args[15]); break;
default:
ERR( "Unsupported nb of args %d\n", nb_args );
assert(FALSE);
ret = 0;
break;
}
return ret;
}
/***********************************************************************
* call_stdcall_function
*/
static LONGLONG call_stdcall_function( LONGLONG_FARPROC func, int nb_args, const int *args )
{
LONGLONG ret;
switch(nb_args)
{
case 0: ret = func(); break;
case 1: ret = func(args[0]); break;
case 2: ret = func(args[0],args[1]); break;
case 3: ret = func(args[0],args[1],args[2]); break;
case 4: ret = func(args[0],args[1],args[2],args[3]); break;
case 5: ret = func(args[0],args[1],args[2],args[3],args[4]); break;
case 6: ret = func(args[0],args[1],args[2],args[3],args[4],
args[5]); break;
case 7: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6]); break;
case 8: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7]); break;
case 9: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8]); break;
case 10: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9]); break;
case 11: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10]); break;
case 12: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],
args[11]); break;
case 13: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],args[11],
args[12]); break;
case 14: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],args[11],
args[12],args[13]); break;
case 15: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],args[11],
args[12],args[13],args[14]); break;
case 16: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
args[6],args[7],args[8],args[9],args[10],args[11],
args[12],args[13],args[14],args[15]); break;
default:
ERR( "Unsupported nb of args %d\n", nb_args );
assert(FALSE);
ret = 0;
break;
}
return ret;
}
/***********************************************************************
* RELAY_CallFrom32
*
* Stack layout on entry to this function:
* ... ...
* (esp+12) arg2
* (esp+8) arg1
* (esp+4) ret_addr
* (esp) return addr to relay code
*/
static LONGLONG RELAY_CallFrom32( int ret_addr, ... )
{
LONGLONG ret;
char buffer[80];
int *args = &ret_addr + 1;
/* Relay addr is the return address for this function */
BYTE *relay_addr = (BYTE *)__builtin_return_address(0);
DEBUG_ENTRY_POINT *relay = (DEBUG_ENTRY_POINT *)(relay_addr - 5);
WORD nb_args = relay->args / sizeof(int);
if (TRACE_ON(relay))
{
get_entry_point( buffer, relay );
DPRINTF( "%04lx:Call %s(", GetCurrentThreadId(), buffer );
RELAY_PrintArgs( args, nb_args, relay->argtypes );
DPRINTF( ") ret=%08x\n", ret_addr );
}
if (relay->ret == 0xc3) /* cdecl */
{
ret = call_cdecl_function( (LONGLONG_CPROC)relay->orig, nb_args, args );
}
else /* stdcall */
{
ret = call_stdcall_function( (LONGLONG_FARPROC)relay->orig, nb_args, args );
}
if (TRACE_ON(relay))
{
BOOL ret64 = (relay->argtypes & 0x80000000) && (nb_args < 16);
if (ret64)
DPRINTF( "%04lx:Ret %s() retval=%08x%08x ret=%08x\n",
GetCurrentThreadId(),
buffer, (UINT)(ret >> 32), (UINT)ret, ret_addr );
else
DPRINTF( "%04lx:Ret %s() retval=%08x ret=%08x\n",
GetCurrentThreadId(),
buffer, (UINT)ret, ret_addr );
}
return ret;
}
/***********************************************************************
* RELAY_CallFrom32Regs
*
* Stack layout (esp is context->Esp, not the current %esp):
*
* ...
* (esp+4) first arg
* (esp) return addr to caller
* (esp-4) return addr to DEBUG_ENTRY_POINT
* (esp-8) ptr to relay entry code for RELAY_CallFrom32Regs
* ... >128 bytes space free to be modified (ensured by the assembly glue)
*/
void WINAPI RELAY_DoCallFrom32Regs( CONTEXT86 *context )
{
char buffer[80];
int* args;
int args_copy[17];
BYTE *entry_point;
BYTE *relay_addr = *((BYTE **)context->Esp - 1);
DEBUG_ENTRY_POINT *relay = (DEBUG_ENTRY_POINT *)(relay_addr - 5);
WORD nb_args = relay->args / sizeof(int);
/* remove extra stuff from the stack */
context->Eip = stack32_pop(context);
args = (int *)context->Esp;
if (relay->ret == 0xc2) /* stdcall */
context->Esp += nb_args * sizeof(int);
entry_point = (BYTE *)relay->orig;
assert( *entry_point == 0xe8 /* lcall */ );
if (TRACE_ON(relay))
{
get_entry_point( buffer, relay );
DPRINTF( "%04lx:Call %s(", GetCurrentThreadId(), buffer );
RELAY_PrintArgs( args, nb_args, relay->argtypes );
DPRINTF( ") ret=%08lx fs=%04lx\n", context->Eip, context->SegFs );
DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
context->Eax, context->Ebx, context->Ecx,
context->Edx, context->Esi, context->Edi );
DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx gs=%04lx flags=%08lx\n",
context->Ebp, context->Esp, context->SegDs,
context->SegEs, context->SegGs, context->EFlags );
}
/* Now call the real function */
memcpy( args_copy, args, nb_args * sizeof(args[0]) );
args_copy[nb_args] = (int)context; /* append context argument */
if (relay->ret == 0xc3) /* cdecl */
{
call_cdecl_function( *(LONGLONG_CPROC *)(entry_point + 5), nb_args+1, args_copy );
}
else /* stdcall */
{
call_stdcall_function( *(LONGLONG_FARPROC *)(entry_point + 5), nb_args+1, args_copy );
}
if (TRACE_ON(relay))
{
DPRINTF( "%04lx:Ret %s() retval=%08lx ret=%08lx fs=%04lx\n",
GetCurrentThreadId(),
buffer, context->Eax, context->Eip, context->SegFs );
DPRINTF(" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
context->Eax, context->Ebx, context->Ecx,
context->Edx, context->Esi, context->Edi );
DPRINTF(" ebp=%08lx esp=%08lx ds=%04lx es=%04lx gs=%04lx flags=%08lx\n",
context->Ebp, context->Esp, context->SegDs,
context->SegEs, context->SegGs, context->EFlags );
}
}
void WINAPI RELAY_CallFrom32Regs(void);
__ASM_GLOBAL_FUNC( RELAY_CallFrom32Regs,
"call " __ASM_NAME("__wine_call_from_32_regs") "\n\t"
".long " __ASM_NAME("RELAY_DoCallFrom32Regs") ",0" );
/* check whether the function at addr starts with a call to __wine_call_from_32_regs */
static BOOL is_register_entry_point( const BYTE *addr )
{
extern void __wine_call_from_32_regs();
int *offset;
void *ptr;
if (*addr != 0xe8) return FALSE; /* not a call */
/* check if call target is __wine_call_from_32_regs */
offset = (int *)(addr + 1);
if (*offset == (char *)__wine_call_from_32_regs - (char *)(offset + 1)) return TRUE;
/* now check if call target is an import table jump to __wine_call_from_32_regs */
addr = (BYTE *)(offset + 1) + *offset;
if (addr[0] != 0xff || addr[1] != 0x25) return FALSE; /* not an indirect jmp */
ptr = *(void **)(addr + 2); /* get indirect jmp target address */
return (*(char **)ptr == (char *)__wine_call_from_32_regs);
}
/***********************************************************************
* RELAY_SetupDLL
*
* Setup relay debugging for a built-in dll.
*/
void RELAY_SetupDLL( const char *module )
{
IMAGE_EXPORT_DIRECTORY *exports;
DEBUG_ENTRY_POINT *debug;
DWORD *funcs;
int i;
const char *name;
char *p, dllname[80];
DWORD size;
exports = RtlImageDirectoryEntryToData( (HMODULE)module, TRUE,
IMAGE_DIRECTORY_ENTRY_EXPORT, &size );
if (!exports) return;
debug = (DEBUG_ENTRY_POINT *)((char *)exports + size);
funcs = (DWORD *)(module + exports->AddressOfFunctions);
strcpy( dllname, module + exports->Name );
p = dllname + strlen(dllname) - 4;
if (p > dllname && !strcasecmp( p, ".dll" )) *p = 0;
for (i = 0; i < exports->NumberOfFunctions; i++, funcs++, debug++)
{
int on = 1;
if (!debug->call) continue; /* not a normal function */
if (debug->call != 0xe8 && debug->call != 0xe9) break; /* not a debug thunk at all */
if ((name = find_exported_name( module, exports, i + exports->Base )))
on = check_relay_include( dllname, name );
if (on)
{
debug->call = 0xe8; /* call relative */
if (is_register_entry_point( debug->orig ))
debug->callfrom32 = (char *)RELAY_CallFrom32Regs - (char *)&debug->ret;
else
debug->callfrom32 = (char *)RELAY_CallFrom32 - (char *)&debug->ret;
}
else
{
debug->call = 0xe9; /* jmp relative */
debug->callfrom32 = (char *)debug->orig - (char *)&debug->ret;
}
debug->orig = (FARPROC)(module + (DWORD)*funcs);
*funcs = (char *)debug - module;
}
}
#else /* __i386__ */
void RELAY_SetupDLL( const char *module )
{
}
#endif /* __i386__ */
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