91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*
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* QEMU low level functions
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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/* Needed early for CONFIG_BSD etc. */
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#ifdef CONFIG_SOLARIS
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#include <sys/statvfs.h>
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/* See MySQL bug #7156 (http://bugs.mysql.com/bug.php?id=7156) for
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discussion about Solaris header problems */
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extern int madvise(char *, size_t, int);
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#endif
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#include "qemu-common.h"
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#include "qemu/cutils.h"
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int qemu_madvise(void *addr, size_t len, int advice)
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{
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if (advice == QEMU_MADV_INVALID) {
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errno = EINVAL;
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return -1;
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}
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#if defined(CONFIG_MADVISE)
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return madvise(addr, len, advice);
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#elif defined(CONFIG_POSIX_MADVISE)
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return posix_madvise(addr, len, advice);
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#else
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errno = EINVAL;
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return -1;
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#endif
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}
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static int qemu_mprotect__osdep(void *addr, size_t size, int prot)
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{
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#ifdef _WIN32
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DWORD old_protect;
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if (!VirtualProtect(addr, size, prot, &old_protect)) {
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// g_autofree gchar *emsg = g_win32_error_message(GetLastError());
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// error_report("%s: VirtualProtect failed: %s", __func__, emsg);
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return -1;
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}
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return 0;
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#else
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if (mprotect(addr, size, prot)) {
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// error_report("%s: mprotect failed: %s", __func__, strerror(errno));
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return -1;
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}
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return 0;
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#endif
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}
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int qemu_mprotect_rwx(void *addr, size_t size)
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{
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#ifdef _WIN32
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return qemu_mprotect__osdep(addr, size, PAGE_EXECUTE_READWRITE);
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#else
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return qemu_mprotect__osdep(addr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
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#endif
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}
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int qemu_mprotect_none(void *addr, size_t size)
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{
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#ifdef _WIN32
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return qemu_mprotect__osdep(addr, size, PAGE_NOACCESS);
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#else
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return qemu_mprotect__osdep(addr, size, PROT_NONE);
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#endif
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}
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