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wine/if1632/relay.c
Alexandre Julliard aa5a1162a3 Patch flat cs of 16-bit entry points if current %cs is different from 
compiled value, and retrieve flat ds from a global variable. This
should avoid problems with win4lin kernels.
2000-10-29 01:28:30 +00:00

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/*
* Copyright 1993 Robert J. Amstadt
* Copyright 1995 Alexandre Julliard
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "wine/winbase16.h"
#include "winnt.h"
#include "heap.h"
#include "module.h"
#include "stackframe.h"
#include "selectors.h"
#include "builtin16.h"
#include "task.h"
#include "syslevel.h"
#include "debugtools.h"
#include "main.h"
#include "callback.h"
DEFAULT_DEBUG_CHANNEL(relay);
/***********************************************************************
* RELAY_Init
*/
BOOL RELAY_Init(void)
{
#ifdef __i386__
WORD codesel;
/* Allocate the code selector for CallTo16 routines */
extern void Call16_Ret_Start(), Call16_Ret_End();
extern void CallTo16_Ret();
extern void CALL32_CBClient_Ret();
extern void CALL32_CBClientEx_Ret();
extern SEGPTR CallTo16_RetAddr;
extern DWORD CallTo16_DataSelector;
extern SEGPTR CALL32_CBClient_RetAddr;
extern SEGPTR CALL32_CBClientEx_RetAddr;
codesel = SELECTOR_AllocBlock( (void *)Call16_Ret_Start,
(char *)Call16_Ret_End - (char *)Call16_Ret_Start,
SEGMENT_CODE, TRUE, FALSE );
if (!codesel) return FALSE;
/* Patch the return addresses for CallTo16 routines */
CallTo16_DataSelector = __get_ds();
CallTo16_RetAddr =
PTR_SEG_OFF_TO_SEGPTR( codesel, (char*)CallTo16_Ret - (char*)Call16_Ret_Start );
CALL32_CBClient_RetAddr =
PTR_SEG_OFF_TO_SEGPTR( codesel, (char*)CALL32_CBClient_Ret - (char*)Call16_Ret_Start );
CALL32_CBClientEx_RetAddr =
PTR_SEG_OFF_TO_SEGPTR( codesel, (char*)CALL32_CBClientEx_Ret - (char*)Call16_Ret_Start );
#endif
return TRUE;
}
/*
* Stubs for the CallTo16/CallFrom16 routines on non-Intel architectures
* (these will never be called but need to be present to satisfy the linker ...)
*/
#ifndef __i386__
WORD CALLBACK CallTo16Word( FARPROC16 target, INT nArgs )
{ assert( FALSE ); }
LONG CALLBACK CallTo16Long( FARPROC16 target, INT nArgs )
{ assert( FALSE ); }
void CALLBACK CallTo16RegisterShort( CONTEXT86 *context, INT nArgs )
{ assert( FALSE ); }
void CALLBACK CallTo16RegisterLong ( CONTEXT86 *context, INT nArgs )
{ assert( FALSE ); }
WORD CallFrom16Word( void )
{ assert( FALSE ); }
LONG CallFrom16Long( void )
{ assert( FALSE ); }
void CallFrom16Register( void )
{ assert( FALSE ); }
void CallFrom16Thunk( void )
{ assert( FALSE ); }
DWORD WINAPI CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi )
{ assert( FALSE ); }
DWORD WINAPI CALL32_CBClientEx( FARPROC proc, LPWORD args, DWORD *esi, INT *nArgs )
{ assert( FALSE ); }
#endif
/* from relay32/relay386.c */
extern char **debug_relay_excludelist,**debug_relay_includelist;
/***********************************************************************
* RELAY_DebugCallFrom16
*/
void RELAY_DebugCallFrom16( CONTEXT86 *context )
{
STACK16FRAME *frame;
WORD ordinal;
char *args16, funstr[80];
const char *args;
int i, usecdecl, reg_func;
if (!TRACE_ON(relay)) return;
frame = CURRENT_STACK16;
args = BUILTIN_GetEntryPoint16( frame, funstr, &ordinal );
if (!args) return; /* happens for the two snoop register relays */
if (!RELAY_ShowDebugmsgRelay(funstr)) return;
DPRINTF( "Call %s(",funstr);
VA_START16( args16 );
usecdecl = ( *args == 'c' );
args += 2;
reg_func = ( memcmp( args, "regs_", 5 ) == 0
|| memcmp( args, "intr_", 5 ) == 0 );
args += 5;
if (usecdecl)
{
while (*args)
{
switch(*args)
{
case 'w':
case 's':
DPRINTF( "0x%04x", *(WORD *)args16 );
args16 += 2;
break;
case 'l':
DPRINTF( "0x%08x", *(int *)args16 );
args16 += 4;
break;
case 'p':
DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
args16 += 4;
break;
case 't':
case 'T':
DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
debugres_a( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 )) );
args16 += 4;
break;
}
args++;
if (*args) DPRINTF( "," );
}
}
else /* not cdecl */
{
/* Start with the last arg */
for (i = 0; args[i]; i++)
{
switch(args[i])
{
case 'w':
case 's':
args16 += 2;
break;
case 'l':
case 'p':
case 't':
case 'T':
args16 += 4;
break;
}
}
while (*args)
{
switch(*args)
{
case 'w':
case 's':
args16 -= 2;
DPRINTF( "0x%04x", *(WORD *)args16 );
break;
case 'l':
args16 -= 4;
DPRINTF( "0x%08x", *(int *)args16 );
break;
case 't':
args16 -= 4;
DPRINTF( "0x%08x %s", *(int *)args16,
debugres_a( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 )));
break;
case 'p':
args16 -= 4;
DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
break;
case 'T':
args16 -= 4;
DPRINTF( "%04x:%04x %s", *(WORD *)(args16+2), *(WORD *)args16,
debugres_a( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 )));
break;
}
args++;
if (*args) DPRINTF( "," );
}
}
DPRINTF( ") ret=%04x:%04x ds=%04x\n", frame->cs, frame->ip, frame->ds );
VA_END16( args16 );
if (reg_func)
DPRINTF(" AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
AX_reg(context), BX_reg(context), CX_reg(context),
DX_reg(context), SI_reg(context), DI_reg(context),
(WORD)context->SegEs, context->EFlags );
SYSLEVEL_CheckNotLevel( 2 );
}
/***********************************************************************
* RELAY_DebugCallFrom16Ret
*/
void RELAY_DebugCallFrom16Ret( CONTEXT86 *context, int ret_val )
{
STACK16FRAME *frame;
WORD ordinal;
char funstr[80];
const char *args;
if (!TRACE_ON(relay)) return;
frame = CURRENT_STACK16;
args = BUILTIN_GetEntryPoint16( frame, funstr, &ordinal );
if (!args) return;
if (!RELAY_ShowDebugmsgRelay(funstr)) return;
DPRINTF( "Ret %s() ",funstr);
if ( memcmp( args+2, "long_", 5 ) == 0 )
{
DPRINTF( "retval=0x%08x ret=%04x:%04x ds=%04x\n",
ret_val, frame->cs, frame->ip, frame->ds );
}
else if ( memcmp( args+2, "word_", 5 ) == 0 )
{
DPRINTF( "retval=0x%04x ret=%04x:%04x ds=%04x\n",
ret_val & 0xffff, frame->cs, frame->ip, frame->ds );
}
else if ( memcmp( args+2, "regs_", 5 ) == 0
|| memcmp( args+2, "intr_", 5 ) == 0 )
{
DPRINTF("retval=none ret=%04x:%04x ds=%04x\n",
(WORD)context->SegCs, LOWORD(context->Eip), (WORD)context->SegDs);
DPRINTF(" AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x ES=%04x EFL=%08lx\n",
AX_reg(context), BX_reg(context), CX_reg(context),
DX_reg(context), SI_reg(context), DI_reg(context),
(WORD)context->SegEs, context->EFlags );
}
SYSLEVEL_CheckNotLevel( 2 );
}
/***********************************************************************
* RELAY_Unimplemented16
*
* This function is called for unimplemented 16-bit entry points (declared
* as 'stub' in the spec file).
*/
void RELAY_Unimplemented16(void)
{
WORD ordinal;
char name[80];
STACK16FRAME *frame = CURRENT_STACK16;
BUILTIN_GetEntryPoint16( frame, name, &ordinal );
MESSAGE("FATAL: No handler for Win16 routine %s (called from %04x:%04x)\n",
name, frame->cs, frame->ip );
ExitProcess(1);
}
/***********************************************************************
* RELAY_DebugCallTo16
*
* 'target' contains either the function to call (normal CallTo16)
* or a pointer to the CONTEXT86 struct (register CallTo16).
* 'nb_args' is the number of argument bytes on the 16-bit stack;
* 'reg_func' specifies whether we have a register CallTo16 or not.
*/
void RELAY_DebugCallTo16( LPVOID target, int nb_args, BOOL reg_func )
{
WORD *stack16;
TEB *teb;
if (!TRACE_ON(relay)) return;
teb = NtCurrentTeb();
stack16 = (WORD *)THREAD_STACK16(teb);
nb_args /= sizeof(WORD);
if ( reg_func )
{
CONTEXT86 *context = (CONTEXT86 *)target;
DPRINTF("CallTo16(func=%04lx:%04x,ds=%04lx",
context->SegCs, LOWORD(context->Eip), context->SegDs );
while (nb_args--) DPRINTF( ",0x%04x", *--stack16 );
DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(teb->cur_stack),
OFFSETOF(teb->cur_stack) );
DPRINTF(" AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x BP=%04x ES=%04x FS=%04x\n",
AX_reg(context), BX_reg(context), CX_reg(context),
DX_reg(context), SI_reg(context), DI_reg(context),
BP_reg(context), (WORD)context->SegEs, (WORD)context->SegFs );
}
else
{
DPRINTF("CallTo16(func=%04x:%04x,ds=%04x",
HIWORD(target), LOWORD(target), SELECTOROF(teb->cur_stack) );
while (nb_args--) DPRINTF( ",0x%04x", *--stack16 );
DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(teb->cur_stack),
OFFSETOF(teb->cur_stack) );
}
SYSLEVEL_CheckNotLevel( 2 );
}
/***********************************************************************
* RELAY_DebugCallTo16Ret
*/
void RELAY_DebugCallTo16Ret( BOOL reg_func, int ret_val )
{
if (!TRACE_ON(relay)) return;
if (!reg_func)
{
DPRINTF("CallTo16() ss:sp=%04x:%04x retval=0x%08x\n",
SELECTOROF(NtCurrentTeb()->cur_stack),
OFFSETOF(NtCurrentTeb()->cur_stack), ret_val);
}
else
{
CONTEXT86 *context = (CONTEXT86 *)ret_val;
DPRINTF("CallTo16() ss:sp=%04x:%04x\n",
SELECTOROF(NtCurrentTeb()->cur_stack),
OFFSETOF(NtCurrentTeb()->cur_stack));
DPRINTF(" AX=%04x BX=%04x CX=%04x DX=%04x BP=%04x SP=%04x\n",
AX_reg(context), BX_reg(context), CX_reg(context),
DX_reg(context), BP_reg(context), LOWORD(context->Esp));
}
SYSLEVEL_CheckNotLevel( 2 );
}
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