2010-10-26 10:39:19 +02:00
|
|
|
/*
|
|
|
|
* os-posix-lib.c
|
|
|
|
*
|
|
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
|
|
* Copyright (c) 2010 Red Hat, Inc.
|
|
|
|
*
|
|
|
|
* QEMU library functions on POSIX which are shared between QEMU and
|
|
|
|
* the QEMU tools.
|
|
|
|
*
|
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
|
|
* 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
|
|
|
|
* furnished to do so, subject to the following conditions:
|
|
|
|
*
|
|
|
|
* 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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|
|
|
2016-01-29 18:49:55 +01:00
|
|
|
#include "qemu/osdep.h"
|
2013-11-14 11:54:16 +01:00
|
|
|
#include <termios.h>
|
2015-05-12 18:09:19 +02:00
|
|
|
#include <termios.h>
|
2013-11-14 11:54:16 +01:00
|
|
|
|
2013-05-18 06:31:48 +02:00
|
|
|
#include <glib/gprintf.h>
|
|
|
|
|
2012-12-17 18:20:04 +01:00
|
|
|
#include "sysemu/sysemu.h"
|
2010-10-26 10:39:19 +02:00
|
|
|
#include "trace.h"
|
include/qemu/osdep.h: Don't include qapi/error.h
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the
Error typedef. Since then, we've moved to include qemu/osdep.h
everywhere. Its file comment explains: "To avoid getting into
possible circular include dependencies, this file should not include
any other QEMU headers, with the exceptions of config-host.h,
compiler.h, os-posix.h and os-win32.h, all of which are doing a
similar job to this file and are under similar constraints."
qapi/error.h doesn't do a similar job, and it doesn't adhere to
similar constraints: it includes qapi-types.h. That's in excess of
100KiB of crap most .c files don't actually need.
Add the typedef to qemu/typedefs.h, and include that instead of
qapi/error.h. Include qapi/error.h in .c files that need it and don't
get it now. Include qapi-types.h in qom/object.h for uint16List.
Update scripts/clean-includes accordingly. Update it further to match
reality: replace config.h by config-target.h, add sysemu/os-posix.h,
sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h
comment quoted above similarly.
This reduces the number of objects depending on qapi/error.h from "all
of them" to less than a third. Unfortunately, the number depending on
qapi-types.h shrinks only a little. More work is needed for that one.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
[Fix compilation without the spice devel packages. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-14 09:01:28 +01:00
|
|
|
#include "qapi/error.h"
|
2012-12-17 18:20:00 +01:00
|
|
|
#include "qemu/sockets.h"
|
2014-02-10 07:48:51 +01:00
|
|
|
#include <libgen.h>
|
2014-05-14 11:43:21 +02:00
|
|
|
#include <sys/signal.h>
|
2016-03-20 18:16:19 +01:00
|
|
|
#include "qemu/cutils.h"
|
2010-10-26 10:39:19 +02:00
|
|
|
|
2011-09-12 16:20:11 +02:00
|
|
|
#ifdef CONFIG_LINUX
|
|
|
|
#include <sys/syscall.h>
|
|
|
|
#endif
|
|
|
|
|
2014-03-13 14:27:59 +01:00
|
|
|
#ifdef __FreeBSD__
|
|
|
|
#include <sys/sysctl.h>
|
2016-09-27 17:24:56 +02:00
|
|
|
#include <libutil.h>
|
2014-03-13 14:27:59 +01:00
|
|
|
#endif
|
|
|
|
|
2016-06-22 19:11:19 +02:00
|
|
|
#include "qemu/mmap-alloc.h"
|
2015-09-24 13:41:17 +02:00
|
|
|
|
2016-09-27 11:58:45 +02:00
|
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
|
|
#include "qemu/error-report.h"
|
|
|
|
#endif
|
|
|
|
|
2011-09-12 16:20:11 +02:00
|
|
|
int qemu_get_thread_id(void)
|
|
|
|
{
|
|
|
|
#if defined(__linux__)
|
|
|
|
return syscall(SYS_gettid);
|
|
|
|
#else
|
|
|
|
return getpid();
|
|
|
|
#endif
|
|
|
|
}
|
2011-06-07 05:34:10 +02:00
|
|
|
|
|
|
|
int qemu_daemon(int nochdir, int noclose)
|
|
|
|
{
|
|
|
|
return daemon(nochdir, noclose);
|
|
|
|
}
|
|
|
|
|
2010-10-26 10:39:26 +02:00
|
|
|
void *qemu_oom_check(void *ptr)
|
2010-10-26 10:39:19 +02:00
|
|
|
{
|
|
|
|
if (ptr == NULL) {
|
|
|
|
fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno));
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
return ptr;
|
|
|
|
}
|
|
|
|
|
2014-05-20 12:24:05 +02:00
|
|
|
void *qemu_try_memalign(size_t alignment, size_t size)
|
2010-10-26 10:39:19 +02:00
|
|
|
{
|
|
|
|
void *ptr;
|
2013-11-29 21:29:17 +01:00
|
|
|
|
|
|
|
if (alignment < sizeof(void*)) {
|
|
|
|
alignment = sizeof(void*);
|
|
|
|
}
|
|
|
|
|
2010-10-26 10:39:19 +02:00
|
|
|
#if defined(_POSIX_C_SOURCE) && !defined(__sun__)
|
|
|
|
int ret;
|
|
|
|
ret = posix_memalign(&ptr, alignment, size);
|
|
|
|
if (ret != 0) {
|
2014-05-20 12:24:05 +02:00
|
|
|
errno = ret;
|
|
|
|
ptr = NULL;
|
2010-10-26 10:39:19 +02:00
|
|
|
}
|
|
|
|
#elif defined(CONFIG_BSD)
|
2014-05-20 12:24:05 +02:00
|
|
|
ptr = valloc(size);
|
2010-10-26 10:39:19 +02:00
|
|
|
#else
|
2014-05-20 12:24:05 +02:00
|
|
|
ptr = memalign(alignment, size);
|
2010-10-26 10:39:19 +02:00
|
|
|
#endif
|
|
|
|
trace_qemu_memalign(alignment, size, ptr);
|
|
|
|
return ptr;
|
|
|
|
}
|
|
|
|
|
2014-05-20 12:24:05 +02:00
|
|
|
void *qemu_memalign(size_t alignment, size_t size)
|
|
|
|
{
|
|
|
|
return qemu_oom_check(qemu_try_memalign(alignment, size));
|
|
|
|
}
|
|
|
|
|
2010-10-26 10:39:19 +02:00
|
|
|
/* alloc shared memory pages */
|
2014-10-31 17:38:37 +01:00
|
|
|
void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment)
|
2010-10-26 10:39:19 +02:00
|
|
|
{
|
2011-09-05 10:07:05 +02:00
|
|
|
size_t align = QEMU_VMALLOC_ALIGN;
|
2015-09-24 13:41:17 +02:00
|
|
|
void *ptr = qemu_ram_mmap(-1, size, align, false);
|
2011-09-05 10:07:05 +02:00
|
|
|
|
2013-04-09 17:43:43 +02:00
|
|
|
if (ptr == MAP_FAILED) {
|
2013-07-31 15:11:11 +02:00
|
|
|
return NULL;
|
2011-10-31 21:29:46 +01:00
|
|
|
}
|
|
|
|
|
2014-10-31 17:38:37 +01:00
|
|
|
if (alignment) {
|
|
|
|
*alignment = align;
|
|
|
|
}
|
2015-09-10 15:36:51 +02:00
|
|
|
|
2013-05-13 16:19:55 +02:00
|
|
|
trace_qemu_anon_ram_alloc(size, ptr);
|
2011-07-25 17:13:36 +02:00
|
|
|
return ptr;
|
2010-10-26 10:39:19 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
void qemu_vfree(void *ptr)
|
|
|
|
{
|
|
|
|
trace_qemu_vfree(ptr);
|
|
|
|
free(ptr);
|
|
|
|
}
|
2010-10-26 10:39:20 +02:00
|
|
|
|
2013-05-13 16:19:56 +02:00
|
|
|
void qemu_anon_ram_free(void *ptr, size_t size)
|
|
|
|
{
|
|
|
|
trace_qemu_anon_ram_free(ptr, size);
|
2015-09-24 13:41:17 +02:00
|
|
|
qemu_ram_munmap(ptr, size);
|
2013-05-13 16:19:56 +02:00
|
|
|
}
|
|
|
|
|
2013-03-27 10:10:43 +01:00
|
|
|
void qemu_set_block(int fd)
|
2011-10-05 09:17:32 +02:00
|
|
|
{
|
|
|
|
int f;
|
|
|
|
f = fcntl(fd, F_GETFL);
|
|
|
|
fcntl(fd, F_SETFL, f & ~O_NONBLOCK);
|
|
|
|
}
|
|
|
|
|
2013-03-27 10:10:43 +01:00
|
|
|
void qemu_set_nonblock(int fd)
|
2010-10-26 10:39:20 +02:00
|
|
|
{
|
|
|
|
int f;
|
|
|
|
f = fcntl(fd, F_GETFL);
|
|
|
|
fcntl(fd, F_SETFL, f | O_NONBLOCK);
|
|
|
|
}
|
|
|
|
|
2013-10-02 12:23:12 +02:00
|
|
|
int socket_set_fast_reuse(int fd)
|
|
|
|
{
|
|
|
|
int val = 1, ret;
|
|
|
|
|
|
|
|
ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
|
|
|
|
(const char *)&val, sizeof(val));
|
|
|
|
|
|
|
|
assert(ret == 0);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-10-26 10:39:20 +02:00
|
|
|
void qemu_set_cloexec(int fd)
|
|
|
|
{
|
|
|
|
int f;
|
|
|
|
f = fcntl(fd, F_GETFD);
|
|
|
|
fcntl(fd, F_SETFD, f | FD_CLOEXEC);
|
|
|
|
}
|
2010-10-26 10:39:21 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Creates a pipe with FD_CLOEXEC set on both file descriptors
|
|
|
|
*/
|
|
|
|
int qemu_pipe(int pipefd[2])
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
#ifdef CONFIG_PIPE2
|
|
|
|
ret = pipe2(pipefd, O_CLOEXEC);
|
|
|
|
if (ret != -1 || errno != ENOSYS) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
ret = pipe(pipefd);
|
|
|
|
if (ret == 0) {
|
|
|
|
qemu_set_cloexec(pipefd[0]);
|
|
|
|
qemu_set_cloexec(pipefd[1]);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2010-11-24 03:38:10 +01:00
|
|
|
|
2011-11-21 09:29:11 +01:00
|
|
|
int qemu_utimens(const char *path, const struct timespec *times)
|
2010-11-24 03:38:10 +01:00
|
|
|
{
|
|
|
|
struct timeval tv[2], tv_now;
|
|
|
|
struct stat st;
|
|
|
|
int i;
|
|
|
|
#ifdef CONFIG_UTIMENSAT
|
|
|
|
int ret;
|
|
|
|
|
2011-11-21 09:29:11 +01:00
|
|
|
ret = utimensat(AT_FDCWD, path, times, AT_SYMLINK_NOFOLLOW);
|
2010-11-24 03:38:10 +01:00
|
|
|
if (ret != -1 || errno != ENOSYS) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/* Fallback: use utimes() instead of utimensat() */
|
|
|
|
|
|
|
|
/* happy if special cases */
|
|
|
|
if (times[0].tv_nsec == UTIME_OMIT && times[1].tv_nsec == UTIME_OMIT) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
if (times[0].tv_nsec == UTIME_NOW && times[1].tv_nsec == UTIME_NOW) {
|
|
|
|
return utimes(path, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* prepare for hard cases */
|
|
|
|
if (times[0].tv_nsec == UTIME_NOW || times[1].tv_nsec == UTIME_NOW) {
|
|
|
|
gettimeofday(&tv_now, NULL);
|
|
|
|
}
|
|
|
|
if (times[0].tv_nsec == UTIME_OMIT || times[1].tv_nsec == UTIME_OMIT) {
|
|
|
|
stat(path, &st);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
|
|
if (times[i].tv_nsec == UTIME_NOW) {
|
|
|
|
tv[i].tv_sec = tv_now.tv_sec;
|
|
|
|
tv[i].tv_usec = tv_now.tv_usec;
|
|
|
|
} else if (times[i].tv_nsec == UTIME_OMIT) {
|
|
|
|
tv[i].tv_sec = (i == 0) ? st.st_atime : st.st_mtime;
|
|
|
|
tv[i].tv_usec = 0;
|
|
|
|
} else {
|
|
|
|
tv[i].tv_sec = times[i].tv_sec;
|
|
|
|
tv[i].tv_usec = times[i].tv_nsec / 1000;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return utimes(path, &tv[0]);
|
|
|
|
}
|
2013-05-18 06:31:48 +02:00
|
|
|
|
|
|
|
char *
|
|
|
|
qemu_get_local_state_pathname(const char *relative_pathname)
|
|
|
|
{
|
|
|
|
return g_strdup_printf("%s/%s", CONFIG_QEMU_LOCALSTATEDIR,
|
|
|
|
relative_pathname);
|
|
|
|
}
|
2013-11-14 11:54:16 +01:00
|
|
|
|
|
|
|
void qemu_set_tty_echo(int fd, bool echo)
|
|
|
|
{
|
|
|
|
struct termios tty;
|
|
|
|
|
|
|
|
tcgetattr(fd, &tty);
|
|
|
|
|
|
|
|
if (echo) {
|
|
|
|
tty.c_lflag |= ECHO | ECHONL | ICANON | IEXTEN;
|
|
|
|
} else {
|
|
|
|
tty.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN);
|
|
|
|
}
|
|
|
|
|
|
|
|
tcsetattr(fd, TCSANOW, &tty);
|
|
|
|
}
|
2014-02-10 07:48:51 +01:00
|
|
|
|
|
|
|
static char exec_dir[PATH_MAX];
|
|
|
|
|
|
|
|
void qemu_init_exec_dir(const char *argv0)
|
|
|
|
{
|
|
|
|
char *dir;
|
|
|
|
char *p = NULL;
|
|
|
|
char buf[PATH_MAX];
|
|
|
|
|
|
|
|
assert(!exec_dir[0]);
|
|
|
|
|
|
|
|
#if defined(__linux__)
|
|
|
|
{
|
|
|
|
int len;
|
|
|
|
len = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
|
|
|
|
if (len > 0) {
|
|
|
|
buf[len] = 0;
|
|
|
|
p = buf;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#elif defined(__FreeBSD__)
|
|
|
|
{
|
|
|
|
static int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
|
|
|
|
size_t len = sizeof(buf) - 1;
|
|
|
|
|
|
|
|
*buf = '\0';
|
|
|
|
if (!sysctl(mib, ARRAY_SIZE(mib), buf, &len, NULL, 0) &&
|
|
|
|
*buf) {
|
|
|
|
buf[sizeof(buf) - 1] = '\0';
|
|
|
|
p = buf;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/* If we don't have any way of figuring out the actual executable
|
|
|
|
location then try argv[0]. */
|
|
|
|
if (!p) {
|
|
|
|
if (!argv0) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
p = realpath(argv0, buf);
|
|
|
|
if (!p) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
2016-04-07 04:46:24 +02:00
|
|
|
dir = g_path_get_dirname(p);
|
2014-02-10 07:48:51 +01:00
|
|
|
|
|
|
|
pstrcpy(exec_dir, sizeof(exec_dir), dir);
|
2016-04-07 04:46:24 +02:00
|
|
|
|
|
|
|
g_free(dir);
|
2014-02-10 07:48:51 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
char *qemu_get_exec_dir(void)
|
|
|
|
{
|
|
|
|
return g_strdup(exec_dir);
|
|
|
|
}
|
2014-05-14 11:43:21 +02:00
|
|
|
|
|
|
|
static sigjmp_buf sigjump;
|
|
|
|
|
|
|
|
static void sigbus_handler(int signal)
|
|
|
|
{
|
|
|
|
siglongjmp(sigjump, 1);
|
|
|
|
}
|
|
|
|
|
2016-07-20 11:54:03 +02:00
|
|
|
void os_mem_prealloc(int fd, char *area, size_t memory, Error **errp)
|
2014-05-14 11:43:21 +02:00
|
|
|
{
|
2014-06-24 22:52:29 +02:00
|
|
|
int ret;
|
2014-05-14 11:43:21 +02:00
|
|
|
struct sigaction act, oldact;
|
|
|
|
sigset_t set, oldset;
|
|
|
|
|
|
|
|
memset(&act, 0, sizeof(act));
|
|
|
|
act.sa_handler = &sigbus_handler;
|
|
|
|
act.sa_flags = 0;
|
|
|
|
|
|
|
|
ret = sigaction(SIGBUS, &act, &oldact);
|
|
|
|
if (ret) {
|
2016-07-20 11:54:03 +02:00
|
|
|
error_setg_errno(errp, errno,
|
|
|
|
"os_mem_prealloc: failed to install signal handler");
|
|
|
|
return;
|
2014-05-14 11:43:21 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* unblock SIGBUS */
|
|
|
|
sigemptyset(&set);
|
|
|
|
sigaddset(&set, SIGBUS);
|
|
|
|
pthread_sigmask(SIG_UNBLOCK, &set, &oldset);
|
|
|
|
|
|
|
|
if (sigsetjmp(sigjump, 1)) {
|
2016-07-20 11:54:03 +02:00
|
|
|
error_setg(errp, "os_mem_prealloc: Insufficient free host memory "
|
|
|
|
"pages available to allocate guest RAM\n");
|
2014-06-24 22:52:29 +02:00
|
|
|
} else {
|
|
|
|
int i;
|
util/mmap-alloc: fix hugetlb support on ppc64
Since commit 8561c9244ddf1122d "exec: allocate PROT_NONE pages on top of
RAM", it is no longer possible to back guest RAM with hugepages on ppc64
hosts:
mmap(NULL, 285212672, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x3fff57000000
mmap(0x3fff57000000, 268435456, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 19, 0) = -1 EBUSY (Device or resource busy)
This is because on ppc64, Linux fixes a page size for a virtual address
at mmap time, so we can't switch a range of memory from anonymous
small pages to hugetlbs with MAP_FIXED.
See commit d0f13e3c20b6fb73ccb467bdca97fa7cf5a574cd
("[POWERPC] Introduce address space "slices"") in Linux
history for the details.
Detect this and create the PROT_NONE mapping using the same fd.
Naturally, this makes the guard page bigger with hugetlbfs.
Based on patch by Greg Kurz.
Acked-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Tested-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-12-02 20:14:12 +01:00
|
|
|
size_t hpagesize = qemu_fd_getpagesize(fd);
|
2015-03-01 13:52:06 +01:00
|
|
|
size_t numpages = DIV_ROUND_UP(memory, hpagesize);
|
2014-05-14 11:43:21 +02:00
|
|
|
|
2014-06-24 22:52:29 +02:00
|
|
|
/* MAP_POPULATE silently ignores failures */
|
2015-03-01 13:52:06 +01:00
|
|
|
for (i = 0; i < numpages; i++) {
|
2014-06-24 22:52:29 +02:00
|
|
|
memset(area + (hpagesize * i), 0, 1);
|
|
|
|
}
|
2016-07-20 11:54:03 +02:00
|
|
|
}
|
2014-05-14 11:43:21 +02:00
|
|
|
|
2016-07-20 11:54:03 +02:00
|
|
|
ret = sigaction(SIGBUS, &oldact, NULL);
|
|
|
|
if (ret) {
|
|
|
|
/* Terminate QEMU since it can't recover from error */
|
|
|
|
perror("os_mem_prealloc: failed to reinstall signal handler");
|
|
|
|
exit(1);
|
2014-06-24 22:52:29 +02:00
|
|
|
}
|
2016-07-20 11:54:03 +02:00
|
|
|
pthread_sigmask(SIG_SETMASK, &oldset, NULL);
|
2014-05-14 11:43:21 +02:00
|
|
|
}
|
2015-05-12 18:09:19 +02:00
|
|
|
|
|
|
|
|
|
|
|
static struct termios oldtty;
|
|
|
|
|
|
|
|
static void term_exit(void)
|
|
|
|
{
|
|
|
|
tcsetattr(0, TCSANOW, &oldtty);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void term_init(void)
|
|
|
|
{
|
|
|
|
struct termios tty;
|
|
|
|
|
|
|
|
tcgetattr(0, &tty);
|
|
|
|
oldtty = tty;
|
|
|
|
|
|
|
|
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|
|
|
|
|INLCR|IGNCR|ICRNL|IXON);
|
|
|
|
tty.c_oflag |= OPOST;
|
|
|
|
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
|
|
|
|
tty.c_cflag &= ~(CSIZE|PARENB);
|
|
|
|
tty.c_cflag |= CS8;
|
|
|
|
tty.c_cc[VMIN] = 1;
|
|
|
|
tty.c_cc[VTIME] = 0;
|
|
|
|
|
|
|
|
tcsetattr(0, TCSANOW, &tty);
|
|
|
|
|
|
|
|
atexit(term_exit);
|
|
|
|
}
|
|
|
|
|
|
|
|
int qemu_read_password(char *buf, int buf_size)
|
|
|
|
{
|
|
|
|
uint8_t ch;
|
|
|
|
int i, ret;
|
|
|
|
|
|
|
|
printf("password: ");
|
|
|
|
fflush(stdout);
|
|
|
|
term_init();
|
|
|
|
i = 0;
|
|
|
|
for (;;) {
|
|
|
|
ret = read(0, &ch, 1);
|
|
|
|
if (ret == -1) {
|
|
|
|
if (errno == EAGAIN || errno == EINTR) {
|
|
|
|
continue;
|
|
|
|
} else {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else if (ret == 0) {
|
|
|
|
ret = -1;
|
|
|
|
break;
|
|
|
|
} else {
|
2015-05-12 18:09:20 +02:00
|
|
|
if (ch == '\r' ||
|
|
|
|
ch == '\n') {
|
2015-05-12 18:09:19 +02:00
|
|
|
ret = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (i < (buf_size - 1)) {
|
|
|
|
buf[i++] = ch;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
term_exit();
|
|
|
|
buf[i] = '\0';
|
|
|
|
printf("\n");
|
|
|
|
return ret;
|
|
|
|
}
|
2015-08-28 15:40:01 +02:00
|
|
|
|
|
|
|
|
2016-09-27 17:24:56 +02:00
|
|
|
char *qemu_get_pid_name(pid_t pid)
|
|
|
|
{
|
|
|
|
char *name = NULL;
|
|
|
|
|
|
|
|
#if defined(__FreeBSD__)
|
|
|
|
/* BSDs don't have /proc, but they provide a nice substitute */
|
|
|
|
struct kinfo_proc *proc = kinfo_getproc(pid);
|
|
|
|
|
|
|
|
if (proc) {
|
|
|
|
name = g_strdup(proc->ki_comm);
|
|
|
|
free(proc);
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
/* Assume a system with reasonable procfs */
|
|
|
|
char *pid_path;
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
pid_path = g_strdup_printf("/proc/%d/cmdline", pid);
|
|
|
|
g_file_get_contents(pid_path, &name, &len, NULL);
|
|
|
|
g_free(pid_path);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return name;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2015-08-28 15:40:01 +02:00
|
|
|
pid_t qemu_fork(Error **errp)
|
|
|
|
{
|
|
|
|
sigset_t oldmask, newmask;
|
|
|
|
struct sigaction sig_action;
|
|
|
|
int saved_errno;
|
|
|
|
pid_t pid;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Need to block signals now, so that child process can safely
|
|
|
|
* kill off caller's signal handlers without a race.
|
|
|
|
*/
|
|
|
|
sigfillset(&newmask);
|
|
|
|
if (pthread_sigmask(SIG_SETMASK, &newmask, &oldmask) != 0) {
|
|
|
|
error_setg_errno(errp, errno,
|
|
|
|
"cannot block signals");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
pid = fork();
|
|
|
|
saved_errno = errno;
|
|
|
|
|
|
|
|
if (pid < 0) {
|
|
|
|
/* attempt to restore signal mask, but ignore failure, to
|
|
|
|
* avoid obscuring the fork failure */
|
|
|
|
(void)pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
|
|
|
|
error_setg_errno(errp, saved_errno,
|
|
|
|
"cannot fork child process");
|
|
|
|
errno = saved_errno;
|
|
|
|
return -1;
|
|
|
|
} else if (pid) {
|
|
|
|
/* parent process */
|
|
|
|
|
|
|
|
/* Restore our original signal mask now that the child is
|
|
|
|
* safely running. Only documented failures are EFAULT (not
|
|
|
|
* possible, since we are using just-grabbed mask) or EINVAL
|
|
|
|
* (not possible, since we are using correct arguments). */
|
|
|
|
(void)pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
|
|
|
|
} else {
|
|
|
|
/* child process */
|
|
|
|
size_t i;
|
|
|
|
|
|
|
|
/* Clear out all signal handlers from parent so nothing
|
|
|
|
* unexpected can happen in our child once we unblock
|
|
|
|
* signals */
|
|
|
|
sig_action.sa_handler = SIG_DFL;
|
|
|
|
sig_action.sa_flags = 0;
|
|
|
|
sigemptyset(&sig_action.sa_mask);
|
|
|
|
|
|
|
|
for (i = 1; i < NSIG; i++) {
|
|
|
|
/* Only possible errors are EFAULT or EINVAL The former
|
|
|
|
* won't happen, the latter we expect, so no need to check
|
|
|
|
* return value */
|
|
|
|
(void)sigaction(i, &sig_action, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Unmask all signals in child, since we've no idea what the
|
|
|
|
* caller's done with their signal mask and don't want to
|
|
|
|
* propagate that to children */
|
|
|
|
sigemptyset(&newmask);
|
|
|
|
if (pthread_sigmask(SIG_SETMASK, &newmask, NULL) != 0) {
|
|
|
|
Error *local_err = NULL;
|
|
|
|
error_setg_errno(&local_err, errno,
|
|
|
|
"cannot unblock signals");
|
|
|
|
error_report_err(local_err);
|
|
|
|
_exit(1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return pid;
|
|
|
|
}
|
2016-09-27 11:58:40 +02:00
|
|
|
|
|
|
|
void *qemu_alloc_stack(size_t *sz)
|
|
|
|
{
|
|
|
|
void *ptr, *guardpage;
|
2016-09-27 11:58:45 +02:00
|
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
|
|
void *ptr2;
|
|
|
|
#endif
|
2016-09-27 11:58:40 +02:00
|
|
|
size_t pagesz = getpagesize();
|
|
|
|
#ifdef _SC_THREAD_STACK_MIN
|
|
|
|
/* avoid stacks smaller than _SC_THREAD_STACK_MIN */
|
|
|
|
long min_stack_sz = sysconf(_SC_THREAD_STACK_MIN);
|
|
|
|
*sz = MAX(MAX(min_stack_sz, 0), *sz);
|
|
|
|
#endif
|
|
|
|
/* adjust stack size to a multiple of the page size */
|
|
|
|
*sz = ROUND_UP(*sz, pagesz);
|
|
|
|
/* allocate one extra page for the guard page */
|
|
|
|
*sz += pagesz;
|
|
|
|
|
|
|
|
ptr = mmap(NULL, *sz, PROT_READ | PROT_WRITE,
|
|
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
|
|
if (ptr == MAP_FAILED) {
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
|
|
|
#if defined(HOST_IA64)
|
|
|
|
/* separate register stack */
|
|
|
|
guardpage = ptr + (((*sz - pagesz) / 2) & ~pagesz);
|
|
|
|
#elif defined(HOST_HPPA)
|
|
|
|
/* stack grows up */
|
|
|
|
guardpage = ptr + *sz - pagesz;
|
|
|
|
#else
|
|
|
|
/* stack grows down */
|
|
|
|
guardpage = ptr;
|
|
|
|
#endif
|
|
|
|
if (mprotect(guardpage, pagesz, PROT_NONE) != 0) {
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
2016-09-27 11:58:45 +02:00
|
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
|
|
for (ptr2 = ptr + pagesz; ptr2 < ptr + *sz; ptr2 += sizeof(uint32_t)) {
|
|
|
|
*(uint32_t *)ptr2 = 0xdeadbeaf;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2016-09-27 11:58:40 +02:00
|
|
|
return ptr;
|
|
|
|
}
|
|
|
|
|
2016-09-27 11:58:45 +02:00
|
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
|
|
static __thread unsigned int max_stack_usage;
|
|
|
|
#endif
|
|
|
|
|
2016-09-27 11:58:40 +02:00
|
|
|
void qemu_free_stack(void *stack, size_t sz)
|
|
|
|
{
|
2016-09-27 11:58:45 +02:00
|
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
|
|
unsigned int usage;
|
|
|
|
void *ptr;
|
|
|
|
|
|
|
|
for (ptr = stack + getpagesize(); ptr < stack + sz;
|
|
|
|
ptr += sizeof(uint32_t)) {
|
|
|
|
if (*(uint32_t *)ptr != 0xdeadbeaf) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
usage = sz - (uintptr_t) (ptr - stack);
|
|
|
|
if (usage > max_stack_usage) {
|
|
|
|
error_report("thread %d max stack usage increased from %u to %u",
|
|
|
|
qemu_get_thread_id(), max_stack_usage, usage);
|
|
|
|
max_stack_usage = usage;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2016-09-27 11:58:40 +02:00
|
|
|
munmap(stack, sz);
|
|
|
|
}
|