cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

char-file.c (4062B)

      1/*
      2 * QEMU System Emulator
      3 *
      4 * Copyright (c) 2003-2008 Fabrice Bellard
      5 *
      6 * Permission is hereby granted, free of charge, to any person obtaining a copy
      7 * of this software and associated documentation files (the "Software"), to deal
      8 * in the Software without restriction, including without limitation the rights
      9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     10 * copies of the Software, and to permit persons to whom the Software is
     11 * furnished to do so, subject to the following conditions:
     12 *
     13 * The above copyright notice and this permission notice shall be included in
     14 * all copies or substantial portions of the Software.
     15 *
     16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     22 * THE SOFTWARE.
     23 */
     24
     25#include "qemu/osdep.h"
     26#include "qapi/error.h"
     27#include "qemu/module.h"
     28#include "qemu/option.h"
     29#include "chardev/char.h"
     30
     31#ifdef _WIN32
     32#include "chardev/char-win.h"
     33#else
     34#include "chardev/char-fd.h"
     35#endif
     36
     37static void qmp_chardev_open_file(Chardev *chr,
     38                                  ChardevBackend *backend,
     39                                  bool *be_opened,
     40                                  Error **errp)
     41{
     42    ChardevFile *file = backend->u.file.data;
     43#ifdef _WIN32
     44    HANDLE out;
     45    DWORD accessmode;
     46    DWORD flags;
     47
     48    if (file->has_in) {
     49        error_setg(errp, "input file not supported");
     50        return;
     51    }
     52
     53    if (file->has_append && file->append) {
     54        /* Append to file if it already exists. */
     55        accessmode = FILE_GENERIC_WRITE & ~FILE_WRITE_DATA;
     56        flags = OPEN_ALWAYS;
     57    } else {
     58        /* Truncate file if it already exists. */
     59        accessmode = GENERIC_WRITE;
     60        flags = CREATE_ALWAYS;
     61    }
     62
     63    out = CreateFile(file->out, accessmode, FILE_SHARE_READ, NULL, flags,
     64                     FILE_ATTRIBUTE_NORMAL, NULL);
     65    if (out == INVALID_HANDLE_VALUE) {
     66        error_setg(errp, "open %s failed", file->out);
     67        return;
     68    }
     69
     70    win_chr_set_file(chr, out, false);
     71#else
     72    int flags, in = -1, out;
     73
     74    flags = O_WRONLY | O_CREAT | O_BINARY;
     75    if (file->has_append && file->append) {
     76        flags |= O_APPEND;
     77    } else {
     78        flags |= O_TRUNC;
     79    }
     80
     81    out = qmp_chardev_open_file_source(file->out, flags, errp);
     82    if (out < 0) {
     83        return;
     84    }
     85
     86    if (file->has_in) {
     87        flags = O_RDONLY;
     88        in = qmp_chardev_open_file_source(file->in, flags, errp);
     89        if (in < 0) {
     90            qemu_close(out);
     91            return;
     92        }
     93    }
     94
     95    qemu_chr_open_fd(chr, in, out);
     96#endif
     97}
     98
     99static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend,
    100                                    Error **errp)
    101{
    102    const char *path = qemu_opt_get(opts, "path");
    103    ChardevFile *file;
    104
    105    backend->type = CHARDEV_BACKEND_KIND_FILE;
    106    if (path == NULL) {
    107        error_setg(errp, "chardev: file: no filename given");
    108        return;
    109    }
    110    file = backend->u.file.data = g_new0(ChardevFile, 1);
    111    qemu_chr_parse_common(opts, qapi_ChardevFile_base(file));
    112    file->out = g_strdup(path);
    113
    114    file->has_append = true;
    115    file->append = qemu_opt_get_bool(opts, "append", false);
    116}
    117
    118static void char_file_class_init(ObjectClass *oc, void *data)
    119{
    120    ChardevClass *cc = CHARDEV_CLASS(oc);
    121
    122    cc->parse = qemu_chr_parse_file_out;
    123    cc->open = qmp_chardev_open_file;
    124}
    125
    126static const TypeInfo char_file_type_info = {
    127    .name = TYPE_CHARDEV_FILE,
    128#ifdef _WIN32
    129    .parent = TYPE_CHARDEV_WIN,
    130#else
    131    .parent = TYPE_CHARDEV_FD,
    132#endif
    133    .class_init = char_file_class_init,
    134};
    135
    136static void register_types(void)
    137{
    138    type_register_static(&char_file_type_info);
    139}
    140
    141type_init(register_types);