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wine/if1632/relay.c
Ulrich Weigand 3967b0912e Make CallTo16 return stub segment owned by KERNEL.
1999-09-20 15:33:01 +00:00

397 lines
12 KiB
C
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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 "global.h"
#include "heap.h"
#include "module.h"
#include "stackframe.h"
#include "builtin16.h"
#include "task.h"
#include "syslevel.h"
#include "debugstr.h"
#include "debugtools.h"
#include "main.h"
DEFAULT_DEBUG_CHANNEL(relay)
/***********************************************************************
* RELAY_Init
*/
BOOL RELAY_Init(void)
{
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 DWORD CallTo16_RetAddr;
extern DWORD CALL32_CBClient_RetAddr;
extern DWORD CALL32_CBClientEx_RetAddr;
codesel = GLOBAL_CreateBlock( GMEM_FIXED, (void *)Call16_Ret_Start,
(int)Call16_Ret_End - (int)Call16_Ret_Start,
GetModuleHandle16( "KERNEL" ),
TRUE, TRUE, FALSE, NULL );
if (!codesel) return FALSE;
/* Patch the return addresses for CallTo16 routines */
CallTo16_RetAddr =
MAKELONG( (int)CallTo16_Ret -(int)Call16_Ret_Start, codesel );
CALL32_CBClient_RetAddr =
MAKELONG( (int)CALL32_CBClient_Ret -(int)Call16_Ret_Start, codesel );
CALL32_CBClientEx_RetAddr =
MAKELONG( (int)CALL32_CBClientEx_Ret -(int)Call16_Ret_Start, codesel );
/* Create built-in modules */
if (!BUILTIN_Init()) return FALSE;
/* Initialize thunking */
return THUNK_Init();
}
/* 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 't':
DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
if (HIWORD(*(SEGPTR *)args16))
debug_dumpstr( (LPSTR)PTR_SEG_TO_LIN(*(SEGPTR *)args16 ));
args16 += 4;
break;
case 'p':
DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
args16 += 4;
break;
case 'T':
DPRINTF( "%04x:%04x", *(WORD *)(args16+2), *(WORD *)args16 );
if (HIWORD( *(SEGPTR *)args16 ))
debug_dumpstr( (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", *(int *)args16 );
if (HIWORD(*(SEGPTR *)args16))
debug_dumpstr( (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", *(WORD *)(args16+2), *(WORD *)args16 );
if (HIWORD( *(SEGPTR *)args16 ))
debug_dumpstr( (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)ES_reg(context), EFL_reg(context) );
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)CS_reg(context), LOWORD(EIP_reg(context)), (WORD)DS_reg(context));
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)ES_reg(context), EFL_reg(context) );
}
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("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",
CS_reg(context), LOWORD(EIP_reg(context)), DS_reg(context) );
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)ES_reg(context), (WORD)FS_reg(context) );
}
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( int ret_val )
{
if (!TRACE_ON(relay)) return;
DPRINTF("CallTo16() ss:sp=%04x:%04x retval=0x%08x\n",
SELECTOROF(NtCurrentTeb()->cur_stack),
OFFSETOF(NtCurrentTeb()->cur_stack), ret_val);
SYSLEVEL_CheckNotLevel( 2 );
}
/**********************************************************************
* Catch (KERNEL.55)
*
* Real prototype is:
* INT16 WINAPI Catch( LPCATCHBUF lpbuf );
*/
void WINAPI Catch16( LPCATCHBUF lpbuf, CONTEXT86 *context )
{
/* Note: we don't save the current ss, as the catch buffer is */
/* only 9 words long. Hopefully no one will have the silly */
/* idea to change the current stack before calling Throw()... */
/* Windows uses:
* lpbuf[0] = ip
* lpbuf[1] = cs
* lpbuf[2] = sp
* lpbuf[3] = bp
* lpbuf[4] = si
* lpbuf[5] = di
* lpbuf[6] = ds
* lpbuf[7] = unused
* lpbuf[8] = ss
*/
lpbuf[0] = LOWORD(EIP_reg(context));
lpbuf[1] = CS_reg(context);
/* Windows pushes 4 more words before saving sp */
lpbuf[2] = LOWORD(ESP_reg(context)) - 4 * sizeof(WORD);
lpbuf[3] = LOWORD(EBP_reg(context));
lpbuf[4] = LOWORD(ESI_reg(context));
lpbuf[5] = LOWORD(EDI_reg(context));
lpbuf[6] = DS_reg(context);
lpbuf[7] = 0;
lpbuf[8] = SS_reg(context);
AX_reg(context) = 0; /* Return 0 */
}
/**********************************************************************
* Throw (KERNEL.56)
*
* Real prototype is:
* INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
*/
void WINAPI Throw16( LPCATCHBUF lpbuf, INT16 retval, CONTEXT86 *context )
{
STACK16FRAME *pFrame;
STACK32FRAME *frame32;
TEB *teb = NtCurrentTeb();
AX_reg(context) = retval;
/* Find the frame32 corresponding to the frame16 we are jumping to */
pFrame = THREAD_STACK16(teb);
frame32 = pFrame->frame32;
while (frame32 && frame32->frame16)
{
if (OFFSETOF(frame32->frame16) < OFFSETOF(teb->cur_stack))
break; /* Something strange is going on */
if (OFFSETOF(frame32->frame16) > lpbuf[2])
{
/* We found the right frame */
pFrame->frame32 = frame32;
break;
}
frame32 = ((STACK16FRAME *)PTR_SEG_TO_LIN(frame32->frame16))->frame32;
}
EIP_reg(context) = lpbuf[0];
CS_reg(context) = lpbuf[1];
ESP_reg(context) = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
EBP_reg(context) = lpbuf[3];
ESI_reg(context) = lpbuf[4];
EDI_reg(context) = lpbuf[5];
DS_reg(context) = lpbuf[6];
if (lpbuf[8] != SS_reg(context))
ERR("Switching stack segment with Throw() not supported; expect crash now\n" );
}
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