VirtualBox

source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-Printf.c@ 60291

最後變更 在這個檔案從60291是 60291,由 vboxsync 提交於 9 年 前

bs3kit: A bunch of changes to be able to test the effects of a GDT page being read-only or not-present.

  • Extended the GDT so we get a whole page to play paging tricks with.
  • Added syscall for restoring a context from ring-0 so we can safely get out of bogus test context that aren't in ring-0 (non-standard CS value causing trouble here). Implemented the string print syscall since the restore syscall forced me to sort out pointers.
  • Changed most string printers to do more than one char at a time (usually a line) to save context switches (screen priting is done via INT 10h in real mode).
  • Test the CS access bit handling during INT XXh.
  • 屬性 svn:eol-style 設為 native
  • 屬性 svn:keywords 設為 Author Date Id Revision
檔案大小: 3.0 KB
 
1/* $Id: bs3-cmn-Printf.c 60291 2016-04-01 20:51:29Z vboxsync $ */
2/** @file
3 * BS3Kit - Bs3Printf, Bs3PrintfV
4 */
5
6/*
7 * Copyright (C) 2007-2016 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.alldomusa.eu.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*********************************************************************************************************************************
29* Header Files *
30*********************************************************************************************************************************/
31#include "bs3kit-template-header.h"
32#include <iprt/ctype.h>
33
34
35/*********************************************************************************************************************************
36* Structures and Typedefs *
37*********************************************************************************************************************************/
38/** Output buffering for Bs3TestPrintfV. */
39typedef struct BS3PRINTBUF
40{
41 uint8_t cchBuf;
42 char achBuf[79];
43} BS3PRINTBUF;
44
45
46static BS3_DECL_CALLBACK(size_t) bs3PrintFmtOutput(char ch, void BS3_FAR *pvUser)
47{
48 BS3PRINTBUF BS3_FAR *pBuf = (BS3PRINTBUF BS3_FAR *)pvUser;
49 if (ch != '\0')
50 {
51 BS3_ASSERT(pBuf->cchBuf < RT_ELEMENTS(pBuf->achBuf));
52 pBuf->achBuf[pBuf->cchBuf++] = ch;
53
54 /* Whether to flush the buffer. We do line flushing here to avoid
55 dropping too much info when the formatter crashes on bad input. */
56 if ( pBuf->cchBuf < RT_ELEMENTS(pBuf->achBuf)
57 && ch != '\n')
58 return 1;
59 }
60 Bs3PrintStrN(&pBuf->achBuf[0], pBuf->cchBuf);
61 pBuf->cchBuf = 0;
62 return ch != '\0';
63}
64
65
66BS3_DECL(size_t) Bs3PrintfV(const char BS3_FAR *pszFormat, va_list va)
67{
68 BS3PRINTBUF Buf;
69 Buf.cchBuf = 0;
70 return Bs3StrFormatV(pszFormat, va, bs3PrintFmtOutput, &Buf);
71}
72
73
74BS3_DECL(size_t) Bs3Printf(const char BS3_FAR *pszFormat, ...)
75{
76 size_t cchRet;
77 va_list va;
78 va_start(va, pszFormat);
79 cchRet = Bs3PrintfV(pszFormat, va);
80 va_end(va);
81 return cchRet;
82}
83
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