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qemu-irix/osdep.c

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/*
* QEMU low level functions
*
* Copyright (c) 2003 Fabrice Bellard
*
* 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
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* 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
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#ifdef CONFIG_SOLARIS
#include <sys/types.h>
#include <sys/statvfs.h>
#endif
/* FIXME: This file should be target independent. However it has kqemu
hacks, so must be built for every target. */
/* Needed early for CONFIG_BSD etc. */
#include "config-host.h"
#ifdef _WIN32
#include <windows.h>
#elif defined(CONFIG_BSD)
#include <stdlib.h>
#else
#include <malloc.h>
#endif
#include "qemu-common.h"
#include "sysemu.h"
#include "qemu_socket.h"
#if !defined(_POSIX_C_SOURCE) || defined(_WIN32)
static void *oom_check(void *ptr)
{
if (ptr == NULL) {
abort();
}
return ptr;
}
#endif
#if defined(_WIN32)
void *qemu_memalign(size_t alignment, size_t size)
{
if (!size) {
abort();
}
return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
}
void *qemu_vmalloc(size_t size)
{
/* FIXME: this is not exactly optimal solution since VirtualAlloc
has 64Kb granularity, but at least it guarantees us that the
memory is page aligned. */
if (!size) {
abort();
}
return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
}
void qemu_vfree(void *ptr)
{
VirtualFree(ptr, 0, MEM_RELEASE);
}
#else
#if defined(CONFIG_KQEMU)
#ifdef __OpenBSD__
#include <sys/param.h>
#include <sys/types.h>
#include <sys/mount.h>
#else
#ifndef __FreeBSD__
#include <sys/vfs.h>
#endif
#endif
#include <sys/mman.h>
#include <fcntl.h>
static void *kqemu_vmalloc(size_t size)
{
static int phys_ram_fd = -1;
static int phys_ram_size = 0;
void *ptr;
/* no need (?) for a dummy file on OpenBSD/FreeBSD */
#if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
int map_anon = MAP_ANON;
#else
int map_anon = 0;
const char *tmpdir;
char phys_ram_file[1024];
#ifdef CONFIG_SOLARIS
struct statvfs stfs;
#else
struct statfs stfs;
#endif
if (!size) {
abort ();
}
if (phys_ram_fd < 0) {
tmpdir = getenv("QEMU_TMPDIR");
if (!tmpdir)
#ifdef CONFIG_SOLARIS
tmpdir = "/tmp";
if (statvfs(tmpdir, &stfs) == 0) {
#else
tmpdir = "/dev/shm";
if (statfs(tmpdir, &stfs) == 0) {
#endif
int64_t free_space;
int ram_mb;
free_space = (int64_t)stfs.f_bavail * stfs.f_bsize;
if ((ram_size + 8192 * 1024) >= free_space) {
ram_mb = (ram_size / (1024 * 1024));
fprintf(stderr,
"You do not have enough space in '%s' for the %d MB of QEMU virtual RAM.\n",
tmpdir, ram_mb);
if (strcmp(tmpdir, "/dev/shm") == 0) {
fprintf(stderr, "To have more space available provided you have enough RAM and swap, do as root:\n"
"mount -o remount,size=%dm /dev/shm\n",
ram_mb + 16);
} else {
fprintf(stderr,
"Use the '-m' option of QEMU to diminish the amount of virtual RAM or use the\n"
"QEMU_TMPDIR environment variable to set another directory where the QEMU\n"
"temporary RAM file will be opened.\n");
}
fprintf(stderr, "Or disable the accelerator module with -no-kqemu\n");
exit(1);
}
}
snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
tmpdir);
phys_ram_fd = mkstemp(phys_ram_file);
if (phys_ram_fd < 0) {
fprintf(stderr,
"warning: could not create temporary file in '%s'.\n"
"Use QEMU_TMPDIR to select a directory in a tmpfs filesystem.\n"
"Using '/tmp' as fallback.\n",
tmpdir);
snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
"/tmp");
phys_ram_fd = mkstemp(phys_ram_file);
if (phys_ram_fd < 0) {
fprintf(stderr, "Could not create temporary memory file '%s'\n",
phys_ram_file);
exit(1);
}
}
unlink(phys_ram_file);
}
size = (size + 4095) & ~4095;
ftruncate(phys_ram_fd, phys_ram_size + size);
#endif /* !(__OpenBSD__ || __FreeBSD__ || __DragonFly__) */
ptr = mmap(NULL,
size,
PROT_WRITE | PROT_READ, map_anon | MAP_SHARED,
phys_ram_fd, phys_ram_size);
if (ptr == MAP_FAILED) {
fprintf(stderr, "Could not map physical memory\n");
exit(1);
}
phys_ram_size += size;
return ptr;
}
static void kqemu_vfree(void *ptr)
{
/* may be useful some day, but currently we do not need to free */
}
#endif
void *qemu_memalign(size_t alignment, size_t size)
{
#if defined(_POSIX_C_SOURCE)
int ret;
void *ptr;
ret = posix_memalign(&ptr, alignment, size);
if (ret != 0)
abort();
return ptr;
#elif defined(CONFIG_BSD)
return oom_check(valloc(size));
#else
return oom_check(memalign(alignment, size));
#endif
}
/* alloc shared memory pages */
void *qemu_vmalloc(size_t size)
{
#if defined(CONFIG_KQEMU)
if (kqemu_allowed)
return kqemu_vmalloc(size);
#endif
return qemu_memalign(getpagesize(), size);
}
void qemu_vfree(void *ptr)
{
#if defined(CONFIG_KQEMU)
if (kqemu_allowed)
kqemu_vfree(ptr);
#endif
free(ptr);
}
#endif
int qemu_create_pidfile(const char *filename)
{
char buffer[128];
int len;
#ifndef _WIN32
int fd;
fd = open(filename, O_RDWR | O_CREAT, 0600);
if (fd == -1)
return -1;
if (lockf(fd, F_TLOCK, 0) == -1)
return -1;
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
if (write(fd, buffer, len) != len)
return -1;
#else
HANDLE file;
DWORD flags;
OVERLAPPED overlap;
BOOL ret;
/* Open for writing with no sharing. */
file = CreateFile(filename, GENERIC_WRITE, 0, NULL,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (file == INVALID_HANDLE_VALUE)
return -1;
flags = LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY;
overlap.hEvent = 0;
/* Lock 1 byte. */
ret = LockFileEx(file, flags, 0, 0, 1, &overlap);
if (ret == 0)
return -1;
/* Write PID to file. */
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
&overlap, NULL);
if (ret == 0)
return -1;
#endif
return 0;
}
#ifdef _WIN32
/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
#define _W32_FT_OFFSET (116444736000000000ULL)
int qemu_gettimeofday(qemu_timeval *tp)
{
union {
unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
FILETIME ft;
} _now;
if(tp)
{
GetSystemTimeAsFileTime (&_now.ft);
tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
}
/* Always return 0 as per Open Group Base Specifications Issue 6.
Do not set errno on error. */
return 0;
}
#endif /* _WIN32 */
#ifdef _WIN32
void socket_set_nonblock(int fd)
{
unsigned long opt = 1;
ioctlsocket(fd, FIONBIO, &opt);
}
int inet_aton(const char *cp, struct in_addr *ia)
{
uint32_t addr = inet_addr(cp);
if (addr == 0xffffffff)
return 0;
ia->s_addr = addr;
return 1;
}
#else
void socket_set_nonblock(int fd)
{
int f;
f = fcntl(fd, F_GETFL);
fcntl(fd, F_SETFL, f | O_NONBLOCK);
}
#endif
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