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Sweden-Number/if1632/relay.c

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C
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/*
* Copyright 1993 Robert J. Amstadt
* Copyright 1995 Alexandre Julliard
*/
#include <assert.h>
#include <stdlib.h>
#include "windows.h"
#include "winnt.h"
#include "global.h"
#include "heap.h"
#include "module.h"
#include "stackframe.h"
#include "task.h"
#include "debugstr.h"
#include "debug.h"
/***********************************************************************
* RELAY_Init
*/
BOOL32 RELAY_Init(void)
{
WORD codesel;
extern BOOL32 THUNK_Init(void);
/* Allocate the code selector for CallTo16 routines */
extern void CALLTO16_Start(), CALLTO16_End();
extern void CALLTO16_Ret_word(), CALLTO16_Ret_long();
extern void CALLTO16_Ret_eax();
extern DWORD CALLTO16_RetAddr_word;
extern DWORD CALLTO16_RetAddr_long;
extern DWORD CALLTO16_RetAddr_eax;
codesel = GLOBAL_CreateBlock( GMEM_FIXED, (void *)CALLTO16_Start,
(int)CALLTO16_End - (int)CALLTO16_Start,
0, TRUE, TRUE, FALSE, NULL );
if (!codesel) return FALSE;
/* Patch the return addresses for CallTo16 routines */
CALLTO16_RetAddr_word=MAKELONG( (int)CALLTO16_Ret_word-(int)CALLTO16_Start,
codesel );
CALLTO16_RetAddr_long=MAKELONG( (int)CALLTO16_Ret_long-(int)CALLTO16_Start,
codesel );
CALLTO16_RetAddr_eax =MAKELONG( (int)CALLTO16_Ret_eax -(int)CALLTO16_Start,
codesel );
/* Create built-in modules */
if (!BUILTIN_Init()) return FALSE;
/* Initialize thunking */
return THUNK_Init();
}
/***********************************************************************
* RELAY_DebugCallFrom16
*/
void RELAY_DebugCallFrom16( int func_type, char *args,
void *entry_point, CONTEXT *context )
{
STACK16FRAME *frame;
WORD ordinal;
char *args16;
int i;
if (!TRACE_ON(relay)) return;
frame = CURRENT_STACK16;
DPRINTF( "Call %s(", BUILTIN_GetEntryPoint16( frame->entry_cs,
frame->entry_ip,
&ordinal ));
VA_START16( args16 );
if (func_type & 4) /* cdecl */
{
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 (func_type & 2) /* register function */
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) );
}
/***********************************************************************
* RELAY_DebugCallFrom16Ret
*/
void RELAY_DebugCallFrom16Ret( int func_type, int ret_val, CONTEXT *context)
{
STACK16FRAME *frame;
WORD ordinal;
if (!TRACE_ON(relay)) return;
frame = CURRENT_STACK16;
DPRINTF( "Ret %s() ", BUILTIN_GetEntryPoint16( frame->entry_cs,
frame->entry_ip,
&ordinal ));
switch(func_type)
{
case 0: /* long */
DPRINTF( "retval=0x%08x ret=%04x:%04x ds=%04x\n",
ret_val, frame->cs, frame->ip, frame->ds );
break;
case 1: /* word */
DPRINTF( "retval=0x%04x ret=%04x:%04x ds=%04x\n",
ret_val & 0xffff, frame->cs, frame->ip, frame->ds );
break;
case 2: /* regs */
DPRINTF("retval=none ret=%04x:%04x ds=%04x\n",
(WORD)CS_reg(context), IP_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) );
break;
}
}
/***********************************************************************
* 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;
STACK16FRAME *frame = CURRENT_STACK16;
MSG("No handler for Win16 routine %s (called from %04x:%04x)\n",
BUILTIN_GetEntryPoint16(frame->entry_cs,frame->entry_ip,&ordinal),
frame->cs, frame->ip );
TASK_KillCurrentTask(1);
}
/***********************************************************************
* RELAY_DebugCallTo16
*
* 'stack' points to the called function address on the 32-bit stack.
* Stack layout:
* ... ...
* (stack+8) arg2
* (stack+4) arg1
* (stack) func to call
*/
void RELAY_DebugCallTo16( int* stack, int nb_args )
{
THDB *thdb;
if (!TRACE_ON(relay)) return;
thdb = THREAD_Current();
if (nb_args == -1) /* Register function */
{
CONTEXT *context = (CONTEXT *)stack[0];
WORD *stack16 = (WORD *)THREAD_STACK16(thdb);
DPRINTF("CallTo16(func=%04lx:%04x,ds=%04lx",
CS_reg(context), IP_reg(context), DS_reg(context) );
nb_args = stack[1] / sizeof(WORD);
while (nb_args--) {
--stack16;
DPRINTF( ",0x%04x", *stack16 );
}
DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(thdb->cur_stack),
OFFSETOF(thdb->cur_stack) );
DPRINTF(" AX=%04x BX=%04x CX=%04x DX=%04x SI=%04x DI=%04x BP=%04x ES=%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) );
}
else
{
DPRINTF("CallTo16(func=%04x:%04x,ds=%04x",
HIWORD(stack[0]), LOWORD(stack[0]),
SELECTOROF(thdb->cur_stack) );
stack++;
while (nb_args--) {
DPRINTF(",0x%04x", *stack );
stack++;
}
DPRINTF(") ss:sp=%04x:%04x\n", SELECTOROF(thdb->cur_stack),
OFFSETOF(thdb->cur_stack) );
}
}
/**********************************************************************
* Catch (KERNEL.55)
*
* Real prototype is:
* INT16 WINAPI Catch( LPCATCHBUF lpbuf );
*/
void WINAPI Catch( CONTEXT *context )
{
VA_LIST16 valist;
SEGPTR buf;
LPCATCHBUF lpbuf;
VA_START16( valist );
buf = VA_ARG16( valist, SEGPTR );
lpbuf = (LPCATCHBUF)PTR_SEG_TO_LIN( buf );
VA_END16( valist );
/* 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] = IP_reg(context);
lpbuf[1] = CS_reg(context);
/* Windows pushes 4 more words before saving sp */
lpbuf[2] = SP_reg(context) - 4 * sizeof(WORD);
lpbuf[3] = BP_reg(context);
lpbuf[4] = SI_reg(context);
lpbuf[5] = DI_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 Throw( CONTEXT *context )
{
VA_LIST16 valist;
SEGPTR buf;
LPCATCHBUF lpbuf;
STACK16FRAME *pFrame;
STACK32FRAME *frame32;
THDB *thdb = THREAD_Current();
VA_START16( valist );
AX_reg(context) = VA_ARG16( valist, WORD ); /* retval */
buf = VA_ARG16( valist, SEGPTR );
lpbuf = (LPCATCHBUF)PTR_SEG_TO_LIN( buf );
VA_END16( valist );
/* Find the frame32 corresponding to the frame16 we are jumping to */
pFrame = THREAD_STACK16( thdb );
frame32 = THREAD_STACK16( thdb )->frame32;
while (frame32 && frame32->frame16)
{
if (OFFSETOF(frame32->frame16) < OFFSETOF(thdb->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;
}
IP_reg(context) = lpbuf[0];
CS_reg(context) = lpbuf[1];
SP_reg(context) = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
BP_reg(context) = lpbuf[3];
SI_reg(context) = lpbuf[4];
DI_reg(context) = lpbuf[5];
DS_reg(context) = lpbuf[6];
if (lpbuf[8] != SS_reg(context))
ERR(relay, "Switching stack segment with Throw() not supported; expect crash now\n" );
if (TRACE_ON(relay)) /* Make sure we have a valid entry point address */
{
static FARPROC16 entryPoint = NULL;
if (!entryPoint) /* Get entry point for Throw() */
entryPoint = NE_GetEntryPoint( GetModuleHandle16("KERNEL"), 56 );
pFrame->entry_cs = SELECTOROF(entryPoint);
pFrame->entry_ip = OFFSETOF(entryPoint);
}
}
/**********************************************************************
* RELAY_CallProc32W
*
* Helper for CallProc[Ex]32W
*/
static DWORD RELAY_CallProc32W(int Ex)
{
DWORD nrofargs, argconvmask;
FARPROC32 proc32;
DWORD *args, ret;
VA_LIST16 valist;
int i;
dbg_decl_str(relay, 1024);
VA_START16( valist );
nrofargs = VA_ARG16( valist, DWORD );
argconvmask = VA_ARG16( valist, DWORD );
proc32 = VA_ARG16( valist, FARPROC32 );
dsprintf(relay, "CallProc32W(%ld,%ld,%p, Ex%d args[",nrofargs,argconvmask,proc32,Ex);
args = (DWORD*)HEAP_xalloc( GetProcessHeap(), 0,
sizeof(DWORD)*nrofargs );
for (i=0;i<nrofargs;i++) {
if (argconvmask & (1<<i))
{
SEGPTR ptr = VA_ARG16( valist, SEGPTR );
args[nrofargs-i-1] = (DWORD)PTR_SEG_TO_LIN(ptr);
dsprintf(relay,"%08lx(%p),",ptr,PTR_SEG_TO_LIN(ptr));
}
else
{
args[nrofargs-i-1] = VA_ARG16( valist, DWORD );
dsprintf(relay,"%ld,",args[nrofargs-i-1]);
}
}
dsprintf(relay,"])");
VA_END16( valist );
switch (nrofargs) {
case 0: ret = proc32();
break;
case 1: ret = proc32(args[0]);
break;
case 2: ret = proc32(args[0],args[1]);
break;
case 3: ret = proc32(args[0],args[1],args[2]);
break;
case 4: ret = proc32(args[0],args[1],args[2],args[3]);
break;
case 5: ret = proc32(args[0],args[1],args[2],args[3],args[4]);
break;
case 6: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5]);
break;
case 7: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
break;
case 8: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
break;
case 9: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
break;
case 10: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
break;
case 11: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]);
break;
default:
/* FIXME: should go up to 32 arguments */
ERR(relay,"Unsupported number of arguments %ld, please report.\n",nrofargs);
ret = 0;
break;
}
/* POP nrofargs DWORD arguments and 3 DWORD parameters */
if (!Ex) STACK16_POP( THREAD_Current(),
(3 + nrofargs) * sizeof(DWORD) );
TRACE(relay,"%s - returns %08lx\n",dbg_str(relay),ret);
HeapFree( GetProcessHeap(), 0, args );
return ret;
}
/**********************************************************************
* CallProc32W (KERNEL.517)
*/
DWORD WINAPI WIN16_CallProc32W()
{
return RELAY_CallProc32W(0);
}
/**********************************************************************
* CallProcEx32W() (KERNEL.518)
*
* C - style linkage to CallProc32W - caller pops stack.
*/
DWORD WINAPI WIN16_CallProcEx32W()
{
return RELAY_CallProc32W(TRUE);
}
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