296 lines
11 KiB
C
296 lines
11 KiB
C
/*
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* 386-specific Win32 relay functions
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*
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* Copyright 1997 Alexandre Julliard
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*/
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#ifdef __i386__
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#include <assert.h>
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#include <string.h>
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#include "winnt.h"
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#include "windows.h"
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#include "builtin32.h"
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#include "selectors.h"
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#include "debugstr.h"
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#include "debug.h"
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char **debug_relay_excludelist = NULL, **debug_relay_includelist = NULL;
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/***********************************************************************
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* RELAY_ShowDebugmsgRelay
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*
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* Simple function to decide if a particular debugging message is
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* wanted. Called from RELAY_CallFrom32 and from in if1632/relay.c
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*/
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int RELAY_ShowDebugmsgRelay(const char *func) {
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if(debug_relay_excludelist || debug_relay_includelist) {
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const char *term = strchr(func, ':');
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char **listitem;
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int len, len2, itemlen, show;
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if(debug_relay_excludelist) {
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show = 1;
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listitem = debug_relay_excludelist;
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} else {
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show = 0;
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listitem = debug_relay_includelist;
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}
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assert(term);
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assert(strlen(term) > 2);
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len = term - func;
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len2 = strchr(func, '.') - func;
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assert(len2 && len2 > 0 && len2 < 64);
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term += 2;
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for(; *listitem; listitem++) {
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itemlen = strlen(*listitem);
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if((itemlen == len && !strncmp(*listitem, func, len)) ||
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(itemlen == len2 && !strncmp(*listitem, func, len2)) ||
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!strcmp(*listitem, term)) {
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show = !show;
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break;
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}
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}
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return show;
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}
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return 1;
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}
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/***********************************************************************
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* RELAY_CallFrom32
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*
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* Stack layout on entry to this function:
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* ... ...
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* (esp+12) arg2
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* (esp+8) arg1
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* (esp+4) ret_addr
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* (esp) return addr to relay code
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*/
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int RELAY_CallFrom32( int ret_addr, ... )
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{
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int i, ret, show;
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char buffer[80];
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FARPROC32 func;
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unsigned int mask, typemask;
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WORD fs;
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int *args = &ret_addr;
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/* Relay addr is the return address for this function */
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BYTE *relay_addr = (BYTE *)args[-1];
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WORD nb_args = *(WORD *)(relay_addr + 1) / sizeof(int);
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assert(TRACE_ON(relay));
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func = (FARPROC32)BUILTIN32_GetEntryPoint( buffer, relay_addr - 5,
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&typemask );
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show = RELAY_ShowDebugmsgRelay(buffer);
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if(show) {
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DPRINTF( "Call %s(", buffer );
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args++;
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for (i = 0, mask = 3; i < nb_args; i++, mask <<= 2)
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{
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if (i) DPRINTF( "," );
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if ((typemask & mask) && HIWORD(args[i]))
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{
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if (typemask & (2<<(2*i)))
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DPRINTF( "%08x L%s", args[i], debugstr_w((LPWSTR)args[i]) );
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else
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DPRINTF( "%08x %s", args[i], debugstr_a((LPCSTR)args[i]) );
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}
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else DPRINTF( "%08x", args[i] );
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}
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GET_FS( fs );
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DPRINTF( ") ret=%08x fs=%04x\n", ret_addr, fs );
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} else {
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args++;
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fs = 0; /* quieten gcc */
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}
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if (*relay_addr == 0xc3) /* cdecl */
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{
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LRESULT (*cfunc)() = (LRESULT(*)())func;
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switch(nb_args)
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{
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case 0: ret = cfunc(); break;
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case 1: ret = cfunc(args[0]); break;
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case 2: ret = cfunc(args[0],args[1]); break;
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case 3: ret = cfunc(args[0],args[1],args[2]); break;
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case 4: ret = cfunc(args[0],args[1],args[2],args[3]); break;
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case 5: ret = cfunc(args[0],args[1],args[2],args[3],args[4]); break;
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case 6: ret = cfunc(args[0],args[1],args[2],args[3],args[4],
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args[5]); break;
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case 7: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6]); break;
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case 8: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7]); break;
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case 9: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8]); break;
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case 10: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9]); break;
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case 11: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10]); break;
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case 12: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10],
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args[11]); break;
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case 13: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10],args[11],
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args[12]); break;
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case 14: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10],args[11],
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args[12],args[13]); break;
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case 15: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10],args[11],
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args[12],args[13],args[14]); break;
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default:
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ERR(relay, "Unsupported nb args %d\n",
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nb_args );
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assert(FALSE);
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}
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}
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else /* stdcall */
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{
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switch(nb_args)
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{
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case 0: ret = func(); break;
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case 1: ret = func(args[0]); break;
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case 2: ret = func(args[0],args[1]); break;
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case 3: ret = func(args[0],args[1],args[2]); break;
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case 4: ret = func(args[0],args[1],args[2],args[3]); break;
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case 5: ret = func(args[0],args[1],args[2],args[3],args[4]); break;
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case 6: ret = func(args[0],args[1],args[2],args[3],args[4],
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args[5]); break;
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case 7: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6]); break;
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case 8: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7]); break;
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case 9: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8]); break;
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case 10: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9]); break;
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case 11: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10]); break;
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case 12: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10],
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args[11]); break;
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case 13: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10],args[11],
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args[12]); break;
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case 14: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10],args[11],
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args[12],args[13]); break;
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case 15: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
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args[6],args[7],args[8],args[9],args[10],args[11],
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args[12],args[13],args[14]); break;
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default:
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ERR(relay, "Unsupported nb args %d\n",nb_args );
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assert(FALSE);
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}
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}
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if(show)
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DPRINTF( "Ret %s() retval=%08x ret=%08x fs=%04x\n",
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buffer, ret, ret_addr, fs );
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return ret;
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}
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/***********************************************************************
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* RELAY_CallFrom32Regs
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*
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* 'context' contains the register contents at the point of call of
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* the REG_ENTRY_POINT. The stack layout of the stack pointed to by
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* ESP_reg(&context) is as follows:
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*
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* If debugmsg(relay) is OFF:
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* ... ...
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* (esp+4) args
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* (esp) return addr to caller
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* (esp-4) function entry point
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*
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* If debugmsg(relay) is ON:
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* ... ...
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* (esp+8) args
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* (esp+4) return addr to caller
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* (esp) return addr to DEBUG_ENTRY_POINT
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* (esp-4) function entry point
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*
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* As the called function might change the stack layout
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* (e.g. FT_Prolog, FT_ExitNN), we remove all modifications to the stack,
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* so that the called function sees (in both cases):
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*
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* ... ...
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* (esp+4) args
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* (esp) return addr to caller
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* ... >128 bytes space free to be modified (ensured by the assembly glue)
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*
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* NOTE: This routine makes no assumption about the relative position of
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* its own stack to the stack pointed to by ESP_reg(&context),
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* except that the latter must have >128 bytes space to grow.
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* This means the assembly glue could even switch stacks completely
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* (e.g. to allow for large stacks).
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*
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*/
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void RELAY_CallFrom32Regs( CONTEXT context )
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{
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typedef void (CALLBACK *entry_point_t)(CONTEXT *);
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entry_point_t entry_point = *(entry_point_t*) (ESP_reg(&context) - 4);
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__RESTORE_ES;
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if (!TRACE_ON(relay))
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{
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/* Simply call the entry point */
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entry_point( &context );
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}
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else
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{
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char buffer[80];
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unsigned int typemask;
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BYTE *relay_addr;
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/*
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* Fixup the context structure because of the extra parameter
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* pushed by the relay debugging code.
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* Note that this implicitly does a RET on the CALL from the
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* DEBUG_ENTRY_POINT to the REG_ENTRY_POINT; setting the EIP register
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* ensures that the assembly glue will directly return to the
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* caller, just as in the non-debugging case.
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*/
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relay_addr = *(BYTE **) ESP_reg(&context);
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if (BUILTIN32_GetEntryPoint( buffer, relay_addr - 5, &typemask )) {
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/* correct win32 spec generated register function found.
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* remove extra call stuff from stack
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*/
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ESP_reg(&context) += sizeof(BYTE *);
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EIP_reg(&context) = *(DWORD *)ESP_reg(&context);
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DPRINTF("Call %s(regs) ret=%08x\n", buffer, *(int *)ESP_reg(&context) );
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DPRINTF(" EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx ESI=%08lx EDI=%08lx\n",
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EAX_reg(&context), EBX_reg(&context), ECX_reg(&context),
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EDX_reg(&context), ESI_reg(&context), EDI_reg(&context) );
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DPRINTF(" EBP=%08lx ESP=%08lx EIP=%08lx DS=%04lx ES=%04lx FS=%04lx GS=%04lx EFL=%08lx\n",
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EBP_reg(&context), ESP_reg(&context), EIP_reg(&context),
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DS_reg(&context), ES_reg(&context), FS_reg(&context),
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GS_reg(&context), EFL_reg(&context) );
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/* Now call the real function */
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entry_point( &context );
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DPRINTF("Ret %s() retval=regs ret=%08x\n", buffer, *(int *)ESP_reg(&context) );
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DPRINTF(" EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx ESI=%08lx EDI=%08lx\n",
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EAX_reg(&context), EBX_reg(&context), ECX_reg(&context),
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EDX_reg(&context), ESI_reg(&context), EDI_reg(&context) );
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DPRINTF(" EBP=%08lx ESP=%08lx EIP=%08lx DS=%04lx ES=%04lx FS=%04lx GS=%04lx EFL=%08lx\n",
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EBP_reg(&context), ESP_reg(&context), EIP_reg(&context),
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DS_reg(&context), ES_reg(&context), FS_reg(&context),
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GS_reg(&context), EFL_reg(&context) );
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} else
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/* WINE internal register function found. Do not remove anything.
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* Do not print any debuginfo (it is not a normal relayed one).
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* Currently only used for snooping.
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*/
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entry_point( &context );
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}
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}
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#endif /* __i386__ */
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