wine/memory/ldt.c
Alexandre Julliard e2991ea7bd Release 950727
Sat Jul 22 22:39:09 IDT 1995 Michael Veksler <e1678223@tochnapc2.technion.ac.il>

	* [ipc/*]
	New directory. This directory contains the new inter-wine
 	communications support. It enables DDE protocols between two wine
 	instances.  Currently it is limited to DDE, but can be enhanced to
 	support OLE between 2 different wine instances.  This is very
 	important for libwine.a DDE/OLE support.

	* [tools/ipcl]
    	A script to delete garbage IPC handles (shared memory, semaphores
 	and message queues).  The current inter-wine communication is not
 	perfect, and sometimes leaves garbage behind.

	* [if1632/relay.c] [include/atom.h] [include/global.h]
 	[loader/selector.c] [loader/task.c] [loader/module.c]
 	[loader/signal.c] [memory/global.c] [misc/atom.c]
 	[windows/class.c] [windows/message.c] [windows/win.c]
	[Imakefile]
    	Hooks for inter-wine DDE support, current Global.*Atom functions
 	renamed to Local.*Atom since Global.*Atom are used for Inter-Wine
 	DDE communication. (The first call to these functions sets up the
 	IPC structures - which otherwise cause unneeded overhead.

Mon Jul 17 19:55:21 1995  Alexandre Julliard  <julliard@sunsite.unc.edu>

	* [controls/menu.c]
	Don't crash if a NULL string is passed to menu functions.

	* [memory/selector.c]
	We now use a bit in ldt_flags_copy to indicate free LDT entries.
	Fixed a bug in SELECTOR_ReallocBlock that could cause it to
	overwrite valid LDT entries when growing a block.

	* [miscemu/instr.c]
	Emulate int xx instruction by storing the interrupt vector in
	CS:IP and returning directly. This allows a program to install an
	interrupt vector.

	* [windows/win.c]
	Added function WIN_GetTopParent to get the top-level parent of a
	window.

Sun Jul  16 18:17:17 1995  Gregory Trubetskoy <grisha@mira.com>

        * [loader/resource.c]
        Added LoadIconHandler. It doesn't do anything yet, but now you
        can use borland help files with winhelp.exe.

Sun Jul 16 11:58:45 1995 Anand Kumria <akumria@ozemail.com.au>

	* [misc/main.c]
	Fixed to return 386 Enhanced mode correctly. Also return the same
 	type of CPU, for both Enhanced and Standard mode, namely a 386.

Sun Jul 16 00:02:04 1995    Martin von Loewis <loewis@informatik.hu-berlin.de>

	* [Configure] [include/options.h] [include/wineopts.h]
	  [misc/main.c][misc/spy.c]
	  Removed support of spy file. Redirected spy messages to stddeb.
	  Removed -spy option. Added -debugmsg +spy option.

	* [debugger/dbg.y][debugger/debug.l]
	Enabled segmented addresses (seg:offs) for break and x commands.

	* [if1632/gdi.spec] [objects/region.c] [windows/graphics.c]
	  [include/region.h]
	FrameRgn, REGION_FrameRgn: New functions

	* [if1632/kernel.spec]
	IsWinOldApTask: Return false

	* [if1632/mouse.spec]
	CplApplet: Removed

	* [if1632/user.spec] [windows/win.c]
	ShowOwnedPopups: New function

	* [if1632/winsock.spec] [misc/winsocket.c]
	inet_addr, select: New prototypes in relay code
	Fixed memory layout for netdb functions (getXbyY).
	WINSOCK_ioctlsocket: Translated FIONREAD, FIONBIO, and FIOASYNC

	* [objects/clipping.c]
	RectVisible: Fixed call to LPToDP

	* [rc/winerc.c]
	main: Removed extra argument to getopt for Linux.

Tue Jul 11 00:14:41 1995   Bernd Schmidt <crux@pool.informatik.rwth-aachen.de>

        * [controls/listbox.c]
	Yet another fix for ListBoxDirectory().
	
	* [loader/module.c] [if1632/kernel.spec]
	Make GetModuleHandle() accept instance handles as parameter.

        * [if1632/relay.c] [loader/task.c]
	Put a magic cookie at the bottom of the 32 bit stack, and check on
	each return from a 32 bit function whether it's still there. Complain
	if it's not.

        * [if1632/user.spec]
	Wrong entry for CloseDriver().

	* [misc/dos_fs.c] [loader/task.c] [include/dos_fs.h] [misc/file.c]
	[miscemu/int21.c]
	Large parts of dos_fs.c simplified. Changed it to use one
	current drive/directory per task, which is set to the module path on
	task creation.
	Prevent CorelPaint from closing stdin.
	open() with O_CREAT set must be passed three parameters.
	DOS FindFirst()/FindNext() could crash when FA_LABEL was set. Fixed,
	it's in DOS_readdir() now.

	* [misc/profile.c]
	Some badly written software (Lotus Freelance Graphics) passes a bogus
	size parameter that caused Wine to write off the end of a segment.
	Fixed. (It's probably too paranoid now.)
	
	* [multimedia/mmsystem.c] [multimedia/time.c] [multimedia/joystick.c]
	[multimedia/Imakefile] [if1632/winprocs.spec]
	16 bit entry point for MMSysTimeCallback.
	Split off time.c and joystick.c from mmsystem.c.
	
	* [objects/dib.c]
	GetDIBits(): call XGetImage() via CallTo32_LargeStack.

        * [windows/cursor.c]
	DestroyCursor(): do nothing for builtin cursors.
	
	* [windows/mdi.c]
	Half of WM_MDISETMENU implemented.
	
	* [windows/win.c]
	EnumWindows() and EnumTaskWindows() never enumerated any windows.
	Fixed.

	* [windows/*.c]
	Fixed GetParent() to return correct values for owned windows.

	* [windows/message.c]
	Don't try to activate disabled top-level windows.

        * [windows/nonclient.c]
	Work around a bug in gcc-2.7.0.
	
	* [tools/build.c] [include/stackframe.h] [memory/global.c] 
	[loader/task.c] [memory/selector.c]
	Some Visual Basic programs (and possibly others, too) expect ES to be 
	preserved by a call to an API function, so we have to save it.
	In GlobalFree() and FreeSelector(), we must clear CURRENT_STACK16->es 
	to prevent segfaults if ES contained the selector to be freed.

Sun Jul  9 20:21:20 1995  Jon Tombs  <jon@gtex02.us.es>

	* [*/*]
	Added missing prototypes to header files and relevant includes
	to reduce compile time warnings.

Sun Jul  9 18:32:56 1995  Michael Patra  <micky@marie.physik.tu-berlin.de>

	* [configure.in] [include/config.h] [*/Makefile.in]
	New configuration scheme based on autoconf.

Sat Jul  8 14:12:45 1995  Morten Welinder  <terra+@cs.cmu.edu>

	* [miscemu/ioports.c]
	Revamp to have only one in- and one out- variant, both really
 	implemented.

	* [miscemu/instr.c]
	INSTR_EmulateInstruction: Use new ioport interface.  Implement
 	string io.  Correct instruction pointer for 32-bit code.

	* [include/miscemu.h]
	Update port function prototypes.

	* [include/registers.h]
	Defined FS and GS.

Sat Jul  8 13:38:54 1995  Hans de Graaff  <graaff@twi72.twi.tudelft.nl>

	* [misc/dos_fs.c]
	ChopOffSlash(): A path consisting off a single slash is left
 	intact, and multiple slashes are all removed.
1995-07-29 13:09:43 +00:00

199 lines
6.2 KiB
C

/*
* LDT manipulation functions
*
* Copyright 1993 Robert J. Amstadt
* Copyright 1995 Alexandre Julliard
*/
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <errno.h>
#include "ldt.h"
#include "stddebug.h"
#include "debug.h"
#ifndef WINELIB
#ifdef linux
#include <linux/unistd.h>
#include <linux/head.h>
#include <linux/ldt.h>
_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
#endif /* linux */
#if defined(__NetBSD__) || defined(__FreeBSD__)
#include <machine/segments.h>
extern int i386_get_ldt(int, union descriptor *, int);
extern int i386_set_ldt(int, union descriptor *, int);
#endif /* __NetBSD__ || __FreeBSD__ */
#endif /* ifndef WINELIB */
ldt_copy_entry ldt_copy[LDT_SIZE] = { {0,0}, };
unsigned char ldt_flags_copy[LDT_SIZE] = { 0, };
/***********************************************************************
* LDT_BytesToEntry
*
* Convert the raw bytes of the descriptor to an ldt_entry structure.
*/
void LDT_BytesToEntry( const unsigned long *buffer, ldt_entry *content )
{
content->base = (*buffer >> 16) & 0x0000ffff;
content->limit = *buffer & 0x0000ffff;
buffer++;
content->base |= (*buffer & 0xff000000) | ((*buffer << 16) & 0x00ff0000);
content->limit |= (*buffer & 0x000f0000);
content->type = (*buffer >> 10) & 3;
content->seg_32bit = (*buffer & 0x00400000) != 0;
content->read_only = (*buffer & 0x00000200) == 0;
content->limit_in_pages = (*buffer & 0x00800000) != 0;
}
/***********************************************************************
* LDT_EntryToBytes
*
* Convert an ldt_entry structure to the raw bytes of the descriptor.
*/
void LDT_EntryToBytes( unsigned long *buffer, const ldt_entry *content )
{
*buffer++ = ((content->base & 0x0000ffff) << 16) |
(content->limit & 0x0ffff);
*buffer = (content->base & 0xff000000) |
((content->base & 0x00ff0000)>>16) |
(content->limit & 0xf0000) |
(content->type << 10) |
((content->read_only == 0) << 9) |
((content->seg_32bit != 0) << 22) |
((content->limit_in_pages != 0) << 23) |
0xf000;
}
/***********************************************************************
* LDT_GetEntry
*
* Retrieve an LDT entry.
*/
int LDT_GetEntry( int entry, ldt_entry *content )
{
int ret = 0;
content->base = ldt_copy[entry].base;
content->limit = ldt_copy[entry].limit;
content->type = (ldt_flags_copy[entry] & LDT_FLAGS_TYPE);
content->seg_32bit = (ldt_flags_copy[entry] & LDT_FLAGS_32BIT) != 0;
content->read_only = (ldt_flags_copy[entry] & LDT_FLAGS_READONLY) !=0;
content->limit_in_pages = (ldt_flags_copy[entry] & LDT_FLAGS_BIG) !=0;
return ret;
}
/***********************************************************************
* LDT_SetEntry
*
* Set an LDT entry.
*/
int LDT_SetEntry( int entry, const ldt_entry *content )
{
int ret = 0;
dprintf_ldt(stddeb,
"LDT_SetEntry: entry=%04x base=%08lx limit=%05lx %s %d-bit flags=%c%c%c\n",
entry, content->base, content->limit,
content->limit_in_pages ? "pages" : "bytes",
content->seg_32bit ? 32 : 16,
content->read_only && (content->type & SEGMENT_CODE) ? '-' : 'r',
content->read_only || (content->type & SEGMENT_CODE) ? '-' : 'w',
(content->type & SEGMENT_CODE) ? 'x' : '-' );
/* Entry 0 must not be modified; its base and limit are always 0 */
if (!entry) return 0;
#ifndef WINELIB
#ifdef linux
{
struct modify_ldt_ldt_s ldt_info;
memset( &ldt_info, 0, sizeof(ldt_info) );
ldt_info.entry_number = entry;
ldt_info.base_addr = content->base;
ldt_info.limit = content->limit;
ldt_info.seg_32bit = content->seg_32bit != 0;
ldt_info.contents = content->type;
ldt_info.read_exec_only = content->read_only != 0;
ldt_info.limit_in_pages = content->limit_in_pages != 0;
ret = modify_ldt(1, &ldt_info, sizeof(ldt_info));
}
#endif /* linux */
#if defined(__NetBSD__) || defined(__FreeBSD__)
{
long d[2];
LDT_EntryToBytes( d, content );
ret = i386_set_ldt(entry, (union descriptor *)d, 1);
if (ret < 0)
{
perror("i386_set_ldt");
fprintf(stderr,
"Did you reconfigure the kernel with \"options USER_LDT\"?\n");
exit(1);
}
}
#endif /* __NetBSD__ || __FreeBSD__ */
#endif /* ifndef WINELIB */
if (ret < 0) return ret;
ldt_copy[entry].base = content->base;
if (!content->limit_in_pages) ldt_copy[entry].limit = content->limit;
else ldt_copy[entry].limit = (content->limit << 12) | 0x0fff;
ldt_flags_copy[entry] = (content->type & LDT_FLAGS_TYPE) |
(content->read_only ? LDT_FLAGS_READONLY : 0) |
(content->seg_32bit ? LDT_FLAGS_32BIT : 0) |
(content->limit_in_pages ? LDT_FLAGS_BIG : 0) |
(ldt_flags_copy[entry] & LDT_FLAGS_ALLOCATED);
return ret;
}
/***********************************************************************
* LDT_Print
*
* Print the content of the LDT on stdout.
*/
void LDT_Print()
{
int i;
char flags[3];
for (i = 0; i < LDT_SIZE; i++)
{
if (!ldt_copy[i].base && !ldt_copy[i].limit) continue; /* Free entry */
if ((ldt_flags_copy[i] & LDT_FLAGS_TYPE) == SEGMENT_CODE)
{
flags[0] = (ldt_flags_copy[i] & LDT_FLAGS_EXECONLY) ? '-' : 'r';
flags[1] = '-';
flags[2] = 'x';
}
else
{
flags[0] = 'r';
flags[1] = (ldt_flags_copy[i] & LDT_FLAGS_READONLY) ? '-' : 'w';
flags[2] = '-';
}
printf("%04x: sel=%04x base=%08lx limit=%05lx %s %d-bit %c%c%c\n",
i, ENTRY_TO_SELECTOR(i),
ldt_copy[i].base, ldt_copy[i].limit,
ldt_flags_copy[i] & LDT_FLAGS_BIG ? "(pages)" : "(bytes)",
ldt_flags_copy[i] & LDT_FLAGS_32BIT ? 32 : 16,
flags[0], flags[1], flags[2] );
}
}