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user32: Pack the MSG structure in messages to allow crossing 32/64 boundaries.

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This commit is contained in:
Alexandre Julliard 2010-03-30 20:37:40 +02:00
parent bbdd742a49
commit 3099b08aa2
1 changed files with 62 additions and 7 deletions
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69
dlls/user32/message.c
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@ -173,6 +173,18 @@ struct packed_NCCALCSIZE_PARAMS
DWORD __pad4;
};
struct packed_MSG
{
user_handle_t hwnd;
DWORD __pad1;
UINT message;
ULONGLONG wParam;
ULONGLONG lParam;
DWORD time;
POINT pt;
DWORD __pad2;
};
/* the structures are unpacked on top of the packed ones, so make sure they fit */
C_ASSERT( sizeof(struct packed_CREATESTRUCTW) >= sizeof(CREATESTRUCTW) );
C_ASSERT( sizeof(struct packed_DRAWITEMSTRUCT) >= sizeof(DRAWITEMSTRUCT) );
@ -183,6 +195,7 @@ C_ASSERT( sizeof(struct packed_WINDOWPOS) >= sizeof(WINDOWPOS) );
C_ASSERT( sizeof(struct packed_COPYDATASTRUCT) >= sizeof(COPYDATASTRUCT) );
C_ASSERT( sizeof(struct packed_HELPINFO) >= sizeof(HELPINFO) );
C_ASSERT( sizeof(struct packed_NCCALCSIZE_PARAMS) >= sizeof(NCCALCSIZE_PARAMS) + sizeof(WINDOWPOS) );
C_ASSERT( sizeof(struct packed_MSG) >= sizeof(MSG) );
union packed_structs
{
@ -195,6 +208,7 @@ union packed_structs
struct packed_COPYDATASTRUCT cds;
struct packed_HELPINFO hi;
struct packed_NCCALCSIZE_PARAMS ncp;
struct packed_MSG msg;
};
/* description of the data fields that need to be packed along with a sent message */
@ -851,8 +865,19 @@ static size_t pack_message( HWND hwnd, UINT message, WPARAM wparam, LPARAM lpara
return sizeof(data->ps.ncp);
}
case WM_GETDLGCODE:
if (lparam) push_data( data, (MSG *)lparam, sizeof(MSG) );
return sizeof(MSG);
if (lparam)
{
MSG *msg = (MSG *)lparam;
data->ps.msg.hwnd = wine_server_user_handle( msg->hwnd );
data->ps.msg.message = msg->message;
data->ps.msg.wParam = msg->wParam;
data->ps.msg.lParam = msg->lParam;
data->ps.msg.time = msg->time;
data->ps.msg.pt = msg->pt;
push_data( data, &data->ps.msg, sizeof(data->ps.msg) );
return sizeof(data->ps.msg);
}
return 0;
case SBM_SETSCROLLINFO:
push_data( data, (SCROLLINFO *)lparam, sizeof(SCROLLINFO) );
return 0;
@ -1201,9 +1226,20 @@ static BOOL unpack_message( HWND hwnd, UINT message, WPARAM *wparam, LPARAM *lpa
}
break;
case WM_GETDLGCODE:
if (!*lparam) return TRUE;
minsize = sizeof(MSG);
break;
if (*lparam)
{
MSG msg;
if (size < sizeof(ps->msg)) return FALSE;
msg.hwnd = wine_server_ptr_handle( ps->msg.hwnd );
msg.message = ps->msg.message;
msg.wParam = (ULONG_PTR)unpack_ptr( ps->msg.wParam );
msg.lParam = (ULONG_PTR)unpack_ptr( ps->msg.lParam );
msg.time = ps->msg.time;
msg.pt = ps->msg.pt;
memcpy( &ps->msg, &msg, sizeof(msg) );
break;
}
return TRUE;
case SBM_SETSCROLLINFO:
minsize = sizeof(SCROLLINFO);
break;
@ -1442,7 +1478,17 @@ static void pack_reply( HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam,
break;
}
case WM_GETDLGCODE:
if (lparam) push_data( data, (MSG *)lparam, sizeof(MSG) );
if (lparam)
{
MSG *msg = (MSG *)lparam;
data->ps.msg.hwnd = wine_server_user_handle( msg->hwnd );
data->ps.msg.message = msg->message;
data->ps.msg.wParam = msg->wParam;
data->ps.msg.lParam = msg->lParam;
data->ps.msg.time = msg->time;
data->ps.msg.pt = msg->pt;
push_data( data, &data->ps.msg, sizeof(data->ps.msg) );
}
break;
case SBM_GETSCROLLINFO:
push_data( data, (SCROLLINFO *)lparam, sizeof(SCROLLINFO) );
@ -1568,7 +1614,16 @@ static void unpack_reply( HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam,
}
break;
case WM_GETDLGCODE:
if (lparam) memcpy( (MSG *)lparam, buffer, min( sizeof(MSG), size ));
if (lparam && size >= sizeof(ps->msg))
{
MSG *msg = (MSG *)lparam;
msg->hwnd = wine_server_ptr_handle( ps->msg.hwnd );
msg->message = ps->msg.message;
msg->wParam = (ULONG_PTR)unpack_ptr( ps->msg.wParam );
msg->lParam = (ULONG_PTR)unpack_ptr( ps->msg.lParam );
msg->time = ps->msg.time;
msg->pt = ps->msg.pt;
}
break;
case SBM_GETSCROLLINFO:
memcpy( (SCROLLINFO *)lparam, buffer, min( sizeof(SCROLLINFO), size ));