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a69b88b2f2
Sun Mar 15 03:46:50 1998 Dimitrie O. Paun <dimi@mail.cs.toronto.edu> * [*/*] Fixed some dprintf_ such that there is one and only one new line for each dprintf and that new line occurs at the end. Transformed some fprintfs into proper debug statements. Removed much redundancy from most of the debug statements. The redundancy appeared because now the component and function name is output automatically. Most debug statements also used to output the name of the function. All these changes prepared the source to switch completely to the new debugging interface. For more info, refer to ./documentation/debug-msg Sat Mar 14 19:45:23 1997 Andreas Mohr <100.30936@germany.net> * [misc/shell.c] [if1632/kernel.spec] Changed parameters of FUNC004() to fix a crash. Not sure if this fix is correct (doc wanted). * [windows/user.c] [if1632/user.spec] [include/user.h] Implemented UserSeeUserDo. * [msdos/int21.c] [include/msdos.h] Added "GET LIST OF LISTS" (INT 21/52h). Sat Mar 14 15:48:02 1998 Douglas Ridgway <ridgway@gmcl.com> * [include/windows.h] [relay32/gdi32.spec] [objects/enhmetafile.c] Beginnings of enhanced metafile support. Fri Mar 13 20:53:09 1998 John Richardson <jrichard@zko.dec.com> * [win32/console.c] Restart interrupted console writes. Fri Mar 13 18:59:24 1998 Matthew Becker <mbecker@glasscity.net> * [*/*.c] Updated documentation for API manpages. * [windows/dce.c] ReleaseDC16: Fixed cast. * [include/windows.h] [memory/virtual.c] VirtualQuery{Ex} should return DWORD instead of BOOL32. Fri Mar 13 13:03:06 1998 Marcus Meissner <msmeissn@cip.informatik.uni-erlangen.de> * [README][documentation/status/] README updated, added lzexpand,version and multimedia status notes to new documentation/status directory. * [ole/*.c][if1632/typelib.spec] Added typelib stubs, several small additions and fixes. * [loader/pe_image.c] Fixed a small bug (fixup_imports got passed the wrong hModule in a remapcase). * [loader/signal.c][if1632/signal.c][misc/winsock_dns.c] [loader/module.c] Fixed some recursive debugger crashes (caused by invalid FS). * [misc/registry.c] Two bugs fixed. Fri Mar 13 04:55:01 1998 David Lee Lambert <lamber45@egr.msu.edu> * [include/winnt.h] [include/winnls.h] Moved LANG_xxx flags to winnls.h * [include/winnls.h] Added flags for GetDateFormat(); fixed validity of LOCALE_SYSTEM_DEFAULT. * [include/windows.h] Added GetTimeFormat() prototypes. * [ole/ole2nls.c] Implemented ASCII date- and time-functions, using an optimized common core; added stubs for Unicode versions; started work on a Unicode core. * [AUTHORS] Added my name. Mon Mar 9 20:10:15 1998 Eric Kohl <ekohl@abo.rhein-zeitung.de> * [relay32/comctl32.spec] [include/imagelist.h] [include/commctrl.h] [misc/imagelist.c] [misc/Makefile.in] First attempt at implementing ImageLists. Sun Mar 8 20:19:49 1998 Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de> * [files/dos_fs.c] [configure.in] Try to get FileTimeToLocalFileTime,FileTimeToSystemTime and SystemTimeToFileTime right. Use timegm() where available. * [misc/lstr.c] Fix an off by one error in FormatMessage and handle the case when args = NULL (used by programs to get the length of the string). * [win32/console.c] Actual display a per-process Title string, better working attempt for WriteConsole32W and ReadConsole32W. Fri Mar 6 20:33:45 1998 Slaven Rezic <eserte@cs.tu-berlin.de> * [include/config.h.in][configure.in][multimedia/audio.c] [multimedia/dsound.c] Added check for FreeBSD sound system. Sun Mar 1 17:40:10 1998 Jason Schonberg <schon@mti.sgi.com> * [controls/edit.c] [include/ole.h] [include/shlobj.h] Removed final commas in enum types. Mon Feb 23 07:52:18 1998 Luiz Otavio L. Zorzella <zorzella@nr.conexware.com> * [multimedia/time.c] Workaround to avoid infinite recursion inside timeGetTime. * [multimedia/audio.c] WODM_GETNUMDEVS and WIDM_GETNUMDEVS only return 1 now if the SOUND_DEV can be opened, or if it's busy.
297 lines
9.1 KiB
C
297 lines
9.1 KiB
C
/*
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* LDT manipulation functions
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*
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* Copyright 1993 Robert J. Amstadt
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* Copyright 1995 Alexandre Julliard
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "ldt.h"
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#include "debug.h"
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#ifdef __i386__
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#ifdef linux
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#include <sys/syscall.h>
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struct modify_ldt_s
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{
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unsigned int entry_number;
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unsigned long base_addr;
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unsigned int limit;
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unsigned int seg_32bit : 1;
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unsigned int contents : 2;
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unsigned int read_exec_only : 1;
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unsigned int limit_in_pages : 1;
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unsigned int seg_not_present : 1;
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};
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static __inline__ int modify_ldt( int func, struct modify_ldt_s *ptr,
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unsigned long count )
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{
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int res;
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#ifdef __PIC__
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__asm__ __volatile__( "pushl %%ebx\n\t"
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"movl %2,%%ebx\n\t"
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"int $0x80\n\t"
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"popl %%ebx"
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: "=a" (res)
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: "0" (SYS_modify_ldt),
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"g" (func),
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"c" (ptr),
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"d" (count) );
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#else
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__asm__ __volatile__("int $0x80"
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: "=a" (res)
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: "0" (SYS_modify_ldt),
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"b" (func),
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"c" (ptr),
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"d" (count) );
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#endif /* __PIC__ */
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if (res >= 0) return res;
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errno = -res;
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return -1;
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}
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#endif /* linux */
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#if defined(__svr4__) || defined(_SCO_DS)
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#include <sys/sysi86.h>
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#ifndef __sun__
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#include <sys/seg.h>
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#endif
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#endif
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#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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#include <machine/segments.h>
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extern int i386_get_ldt(int, union descriptor *, int);
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extern int i386_set_ldt(int, union descriptor *, int);
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#endif /* __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
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#endif /* __i386__ */
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ldt_copy_entry ldt_copy[LDT_SIZE];
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unsigned char ldt_flags_copy[LDT_SIZE];
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/***********************************************************************
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* LDT_BytesToEntry
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*
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* Convert the raw bytes of the descriptor to an ldt_entry structure.
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*/
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void LDT_BytesToEntry( const unsigned long *buffer, ldt_entry *content )
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{
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content->base = (*buffer >> 16) & 0x0000ffff;
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content->limit = *buffer & 0x0000ffff;
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buffer++;
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content->base |= (*buffer & 0xff000000) | ((*buffer << 16) & 0x00ff0000);
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content->limit |= (*buffer & 0x000f0000);
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content->type = (*buffer >> 10) & 3;
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content->seg_32bit = (*buffer & 0x00400000) != 0;
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content->read_only = (*buffer & 0x00000200) == 0;
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content->limit_in_pages = (*buffer & 0x00800000) != 0;
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}
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/***********************************************************************
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* LDT_EntryToBytes
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*
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* Convert an ldt_entry structure to the raw bytes of the descriptor.
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*/
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void LDT_EntryToBytes( unsigned long *buffer, const ldt_entry *content )
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{
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*buffer++ = ((content->base & 0x0000ffff) << 16) |
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(content->limit & 0x0ffff);
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*buffer = (content->base & 0xff000000) |
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((content->base & 0x00ff0000)>>16) |
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(content->limit & 0xf0000) |
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(content->type << 10) |
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((content->read_only == 0) << 9) |
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((content->seg_32bit != 0) << 22) |
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((content->limit_in_pages != 0) << 23) |
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0xf000;
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}
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/***********************************************************************
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* LDT_GetEntry
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*
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* Retrieve an LDT entry.
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*/
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int LDT_GetEntry( int entry, ldt_entry *content )
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{
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int ret = 0;
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content->base = ldt_copy[entry].base;
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content->limit = ldt_copy[entry].limit;
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content->type = (ldt_flags_copy[entry] & LDT_FLAGS_TYPE);
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content->seg_32bit = (ldt_flags_copy[entry] & LDT_FLAGS_32BIT) != 0;
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content->read_only = (ldt_flags_copy[entry] & LDT_FLAGS_READONLY) !=0;
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content->limit_in_pages = (ldt_flags_copy[entry] & LDT_FLAGS_BIG) !=0;
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if (content->limit_in_pages) content->limit >>= 12;
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return ret;
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}
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/***********************************************************************
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* LDT_SetEntry
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*
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* Set an LDT entry.
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*/
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int LDT_SetEntry( int entry, const ldt_entry *content )
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{
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int ret = 0;
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TRACE(ldt, "entry=%04x base=%08lx limit=%05lx %s %d-bit "
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"flags=%c%c%c\n", entry, content->base, content->limit,
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content->limit_in_pages ? "pages" : "bytes",
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content->seg_32bit ? 32 : 16,
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content->read_only && (content->type & SEGMENT_CODE) ? '-' : 'r',
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content->read_only || (content->type & SEGMENT_CODE) ? '-' : 'w',
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(content->type & SEGMENT_CODE) ? 'x' : '-' );
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/* Entry 0 must not be modified; its base and limit are always 0 */
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if (!entry) return 0;
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#ifdef __i386__
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#ifdef linux
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{
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struct modify_ldt_s ldt_info;
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ldt_info.entry_number = entry;
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ldt_info.base_addr = content->base;
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ldt_info.limit = content->limit;
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ldt_info.seg_32bit = content->seg_32bit != 0;
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ldt_info.contents = content->type;
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ldt_info.read_exec_only = content->read_only != 0;
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ldt_info.limit_in_pages = content->limit_in_pages != 0;
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ldt_info.seg_not_present = 0;
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/* Make sure the info will be accepted by the kernel */
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/* This is ugly, but what can I do? */
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if (content->type == SEGMENT_STACK)
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{
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/* FIXME */
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}
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else
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{
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if (ldt_info.base_addr >= 0xc0000000)
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{
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fprintf( stderr, "LDT_SetEntry: invalid base addr %08lx\n",
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ldt_info.base_addr );
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return -1;
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}
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if (content->limit_in_pages)
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{
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if ((ldt_info.limit << 12) + 0xfff >
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0xc0000000 - ldt_info.base_addr)
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ldt_info.limit = (0xc0000000 - 0xfff - ldt_info.base_addr) >> 12;
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}
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else
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{
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if (ldt_info.limit > 0xc0000000 - ldt_info.base_addr)
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ldt_info.limit = 0xc0000000 - ldt_info.base_addr;
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}
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}
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if ((ret = modify_ldt(1, &ldt_info, sizeof(ldt_info))) < 0)
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perror( "modify_ldt" );
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}
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#endif /* linux */
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#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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{
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long d[2];
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LDT_EntryToBytes( d, content );
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ret = i386_set_ldt(entry, (union descriptor *)d, 1);
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if (ret < 0)
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{
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perror("i386_set_ldt");
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fprintf(stderr,
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"Did you reconfigure the kernel with \"options USER_LDT\"?\n");
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exit(1);
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}
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}
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#endif /* __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
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#if defined(__svr4__) || defined(_SCO_DS)
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{
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struct ssd ldt_mod;
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int i;
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ldt_mod.sel = ENTRY_TO_SELECTOR(entry) | 4;
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ldt_mod.bo = content->base;
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ldt_mod.ls = content->limit;
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i = ((content->limit & 0xf0000) |
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(content->type << 10) |
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(((content->read_only != 0) ^ 1) << 9) |
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((content->seg_32bit != 0) << 22) |
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((content->limit_in_pages != 0)<< 23) |
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(1<<15) |
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0x7000);
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ldt_mod.acc1 = (i & 0xff00) >> 8;
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ldt_mod.acc2 = (i & 0xf00000) >> 20;
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if (content->base == 0)
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{
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ldt_mod.acc1 = 0;
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ldt_mod.acc2 = 0;
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}
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if ((ret = sysi86(SI86DSCR, &ldt_mod)) == -1) perror("sysi86");
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}
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#endif
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#endif /* __i386__ */
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if (ret < 0) return ret;
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ldt_copy[entry].base = content->base;
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if (!content->limit_in_pages) ldt_copy[entry].limit = content->limit;
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else ldt_copy[entry].limit = (content->limit << 12) | 0x0fff;
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ldt_flags_copy[entry] = (content->type & LDT_FLAGS_TYPE) |
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(content->read_only ? LDT_FLAGS_READONLY : 0) |
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(content->seg_32bit ? LDT_FLAGS_32BIT : 0) |
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(content->limit_in_pages ? LDT_FLAGS_BIG : 0) |
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(ldt_flags_copy[entry] & LDT_FLAGS_ALLOCATED);
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return ret;
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}
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/***********************************************************************
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* LDT_Print
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*
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* Print the content of the LDT on stdout.
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*/
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void LDT_Print( int start, int length )
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{
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int i;
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char flags[3];
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if (length == -1) length = LDT_SIZE - start;
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for (i = start; i < start + length; i++)
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{
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if (!ldt_copy[i].base && !ldt_copy[i].limit) continue; /* Free entry */
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if ((ldt_flags_copy[i] & LDT_FLAGS_TYPE) == SEGMENT_CODE)
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{
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flags[0] = (ldt_flags_copy[i] & LDT_FLAGS_EXECONLY) ? '-' : 'r';
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flags[1] = '-';
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flags[2] = 'x';
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}
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else
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{
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flags[0] = 'r';
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flags[1] = (ldt_flags_copy[i] & LDT_FLAGS_READONLY) ? '-' : 'w';
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flags[2] = '-';
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}
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fprintf(stderr,"%04x: sel=%04x base=%08lx limit=%08lx %d-bit %c%c%c\n",
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i, ENTRY_TO_SELECTOR(i),
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ldt_copy[i].base, ldt_copy[i].limit,
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ldt_flags_copy[i] & LDT_FLAGS_32BIT ? 32 : 16,
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flags[0], flags[1], flags[2] );
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}
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}
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