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[PATCH v3 07/12] osdep: These function are only available on Non-Win32 s
|
From: |
Yonggang Luo |
|
Subject: |
[PATCH v3 07/12] osdep: These function are only available on Non-Win32 system. |
|
Date: |
Thu, 3 Sep 2020 15:43:08 +0800 |
int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive);
int qemu_unlock_fd(int fd, int64_t start, int64_t len);
int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive);
bool qemu_has_ofd_lock(void);
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
include/qemu/osdep.h | 1372 +++++++++++++++++++++---------------------
1 file changed, 686 insertions(+), 686 deletions(-)
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 412962d91a..e80fddd1e8 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -1,686 +1,686 @@
-/*
- * OS includes and handling of OS dependencies
- *
- * This header exists to pull in some common system headers that
- * most code in QEMU will want, and to fix up some possible issues with
- * it (missing defines, Windows weirdness, and so on).
- *
- * To avoid getting into possible circular include dependencies, this
- * file should not include any other QEMU headers, with the exceptions
- * of config-host.h, config-target.h, qemu/compiler.h,
- * sysemu/os-posix.h, sysemu/os-win32.h, glib-compat.h and
- * qemu/typedefs.h, all of which are doing a similar job to this file
- * and are under similar constraints.
- *
- * This header also contains prototypes for functions defined in
- * os-*.c and util/oslib-*.c; those would probably be better split
- * out into separate header files.
- *
- * In an ideal world this header would contain only:
- * (1) things which everybody needs
- * (2) things without which code would work on most platforms but
- * fail to compile or misbehave on a minority of host OSes
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- */
-#ifndef QEMU_OSDEP_H
-#define QEMU_OSDEP_H
-
-#include "config-host.h"
-#ifdef NEED_CPU_H
-#include CONFIG_TARGET
-#else
-#include "exec/poison.h"
-#endif
-
-#include "qemu/compiler.h"
-
-/* Older versions of C++ don't get definitions of various macros from
- * stdlib.h unless we define these macros before first inclusion of
- * that system header.
- */
-#ifndef __STDC_CONSTANT_MACROS
-#define __STDC_CONSTANT_MACROS
-#endif
-#ifndef __STDC_LIMIT_MACROS
-#define __STDC_LIMIT_MACROS
-#endif
-#ifndef __STDC_FORMAT_MACROS
-#define __STDC_FORMAT_MACROS
-#endif
-
-/* The following block of code temporarily renames the daemon() function so the
- * compiler does not see the warning associated with it in stdlib.h on OSX
- */
-#ifdef __APPLE__
-#define daemon qemu_fake_daemon_function
-#include <stdlib.h>
-#undef daemon
-extern int daemon(int, int);
-#endif
-
-#ifdef _WIN32
-/* as defined in sdkddkver.h */
-#ifndef _WIN32_WINNT
-#define _WIN32_WINNT 0x0600 /* Vista */
-#endif
-/* reduces the number of implicitly included headers */
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#endif
-#endif
-
-/* enable C99/POSIX format strings (needs mingw32-runtime 3.15 or later) */
-#ifdef __MINGW32__
-#define __USE_MINGW_ANSI_STDIO 1
-#endif
-
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <sys/types.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-#include <string.h>
-#include <strings.h>
-#include <inttypes.h>
-#include <limits.h>
-/* Put unistd.h before time.h as that triggers localtime_r/gmtime_r
- * function availability on recentish Mingw-w64 platforms. */
-#include <unistd.h>
-#include <time.h>
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <assert.h>
-/* setjmp must be declared before sysemu/os-win32.h
- * because it is redefined there. */
-#include <setjmp.h>
-#include <signal.h>
-
-#ifdef HAVE_SYS_SIGNAL_H
-#include <sys/signal.h>
-#endif
-
-#ifndef _WIN32
-#include <sys/wait.h>
-#else
-#define WIFEXITED(x) 1
-#define WEXITSTATUS(x) (x)
-#endif
-
-#ifdef _WIN32
-#include "sysemu/os-win32.h"
-#endif
-
-#ifdef CONFIG_POSIX
-#include "sysemu/os-posix.h"
-#endif
-
-#include "glib-compat.h"
-#include "qemu/typedefs.h"
-
-/*
- * For mingw, as of v6.0.0, the function implementing the assert macro is
- * not marked as noreturn, so the compiler cannot delete code following an
- * assert(false) as unused. We rely on this within the code base to delete
- * code that is unreachable when features are disabled.
- * All supported versions of Glib's g_assert() satisfy this requirement.
- */
-#ifdef __MINGW32__
-#undef assert
-#define assert(x) g_assert(x)
-#endif
-
-/*
- * According to waitpid man page:
- * WCOREDUMP
- * This macro is not specified in POSIX.1-2001 and is not
- * available on some UNIX implementations (e.g., AIX, SunOS).
- * Therefore, enclose its use inside #ifdef WCOREDUMP ... #endif.
- */
-#ifndef WCOREDUMP
-#define WCOREDUMP(status) 0
-#endif
-/*
- * We have a lot of unaudited code that may fail in strange ways, or
- * even be a security risk during migration, if you disable assertions
- * at compile-time. You may comment out these safety checks if you
- * absolutely want to disable assertion overhead, but it is not
- * supported upstream so the risk is all yours. Meanwhile, please
- * submit patches to remove any side-effects inside an assertion, or
- * fixing error handling that should use Error instead of assert.
- */
-#ifdef NDEBUG
-#error building with NDEBUG is not supported
-#endif
-#ifdef G_DISABLE_ASSERT
-#error building with G_DISABLE_ASSERT is not supported
-#endif
-
-#ifndef O_LARGEFILE
-#define O_LARGEFILE 0
-#endif
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-#ifndef MAP_ANONYMOUS
-#define MAP_ANONYMOUS MAP_ANON
-#endif
-#ifndef MAP_FIXED_NOREPLACE
-#define MAP_FIXED_NOREPLACE 0
-#endif
-#ifndef ENOMEDIUM
-#define ENOMEDIUM ENODEV
-#endif
-#if !defined(ENOTSUP)
-#define ENOTSUP 4096
-#endif
-#if !defined(ECANCELED)
-#define ECANCELED 4097
-#endif
-#if !defined(EMEDIUMTYPE)
-#define EMEDIUMTYPE 4098
-#endif
-#if !defined(ESHUTDOWN)
-#define ESHUTDOWN 4099
-#endif
-
-/* time_t may be either 32 or 64 bits depending on the host OS, and
- * can be either signed or unsigned, so we can't just hardcode a
- * specific maximum value. This is not a C preprocessor constant,
- * so you can't use TIME_MAX in an #ifdef, but for our purposes
- * this isn't a problem.
- */
-
-/* The macros TYPE_SIGNED, TYPE_WIDTH, and TYPE_MAXIMUM are from
- * Gnulib, and are under the LGPL v2.1 or (at your option) any
- * later version.
- */
-
-/* True if the real type T is signed. */
-#define TYPE_SIGNED(t) (!((t)0 < (t)-1))
-
-/* The width in bits of the integer type or expression T.
- * Padding bits are not supported.
- */
-#define TYPE_WIDTH(t) (sizeof(t) * CHAR_BIT)
-
-/* The maximum and minimum values for the integer type T. */
-#define TYPE_MAXIMUM(t) \
- ((t) (!TYPE_SIGNED(t) \
- ? (t)-1 \
- : ((((t)1 << (TYPE_WIDTH(t) - 2)) - 1) * 2 + 1)))
-
-#ifndef TIME_MAX
-#define TIME_MAX TYPE_MAXIMUM(time_t)
-#endif
-
-/* HOST_LONG_BITS is the size of a native pointer in bits. */
-#if UINTPTR_MAX == UINT32_MAX
-# define HOST_LONG_BITS 32
-#elif UINTPTR_MAX == UINT64_MAX
-# define HOST_LONG_BITS 64
-#else
-# error Unknown pointer size
-#endif
-
-/* Mac OSX has a <stdint.h> bug that incorrectly defines SIZE_MAX with
- * the wrong type. Our replacement isn't usable in preprocessor
- * expressions, but it is sufficient for our needs. */
-#if defined(HAVE_BROKEN_SIZE_MAX) && HAVE_BROKEN_SIZE_MAX
-#undef SIZE_MAX
-#define SIZE_MAX ((size_t)-1)
-#endif
-
-/*
- * Two variations of MIN/MAX macros. The first is for runtime use, and
- * evaluates arguments only once (so it is safe even with side
- * effects), but will not work in constant contexts (such as array
- * size declarations) because of the '{}'. The second is for constant
- * expression use, where evaluating arguments twice is safe because
- * the result is going to be constant anyway, but will not work in a
- * runtime context because of a void expression where a value is
- * expected. Thus, both gcc and clang will fail to compile if you use
- * the wrong macro (even if the error may seem a bit cryptic).
- *
- * Note that neither form is usable as an #if condition; if you truly
- * need to write conditional code that depends on a minimum or maximum
- * determined by the pre-processor instead of the compiler, you'll
- * have to open-code it. Sadly, Coverity is severely confused by the
- * constant variants, so we have to dumb things down there.
- */
-#undef MIN
-#define MIN(a, b) \
- ({ \
- typeof(1 ? (a) : (b)) _a = (a), _b = (b); \
- _a < _b ? _a : _b; \
- })
-#undef MAX
-#define MAX(a, b) \
- ({ \
- typeof(1 ? (a) : (b)) _a = (a), _b = (b); \
- _a > _b ? _a : _b; \
- })
-
-#ifdef __COVERITY__
-# define MIN_CONST(a, b) ((a) < (b) ? (a) : (b))
-# define MAX_CONST(a, b) ((a) > (b) ? (a) : (b))
-#else
-# define MIN_CONST(a, b) \
- __builtin_choose_expr( \
- __builtin_constant_p(a) && __builtin_constant_p(b), \
- (a) < (b) ? (a) : (b), \
- ((void)0))
-# define MAX_CONST(a, b) \
- __builtin_choose_expr( \
- __builtin_constant_p(a) && __builtin_constant_p(b), \
- (a) > (b) ? (a) : (b), \
- ((void)0))
-#endif
-
-/*
- * Minimum function that returns zero only if both values are zero.
- * Intended for use with unsigned values only.
- */
-#ifndef MIN_NON_ZERO
-#define MIN_NON_ZERO(a, b) \
- ({ \
- typeof(1 ? (a) : (b)) _a = (a), _b = (b); \
- _a == 0 ? _b : (_b == 0 || _b > _a) ? _a : _b; \
- })
-#endif
-
-/* Round number down to multiple */
-#define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m))
-
-/* Round number up to multiple. Safe when m is not a power of 2 (see
- * ROUND_UP for a faster version when a power of 2 is guaranteed) */
-#define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))
-
-/* Check if n is a multiple of m */
-#define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0)
-
-/* n-byte align pointer down */
-#define QEMU_ALIGN_PTR_DOWN(p, n) \
- ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n)))
-
-/* n-byte align pointer up */
-#define QEMU_ALIGN_PTR_UP(p, n) \
- ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n)))
-
-/* Check if pointer p is n-bytes aligned */
-#define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n))
-
-/* Round number up to multiple. Requires that d be a power of 2 (see
- * QEMU_ALIGN_UP for a safer but slower version on arbitrary
- * numbers); works even if d is a smaller type than n. */
-#ifndef ROUND_UP
-#define ROUND_UP(n, d) (((n) + (d) - 1) & -(0 ? (n) : (d)))
-#endif
-
-#ifndef DIV_ROUND_UP
-#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
-#endif
-
-/*
- * &(x)[0] is always a pointer - if it's same type as x then the argument is a
- * pointer, not an array.
- */
-#define QEMU_IS_ARRAY(x) (!__builtin_types_compatible_p(typeof(x), \
- typeof(&(x)[0])))
-#ifndef ARRAY_SIZE
-#define ARRAY_SIZE(x) ((sizeof(x) / sizeof((x)[0])) + \
- QEMU_BUILD_BUG_ON_ZERO(!QEMU_IS_ARRAY(x)))
-#endif
-
-int qemu_daemon(int nochdir, int noclose);
-void *qemu_try_memalign(size_t alignment, size_t size);
-void *qemu_memalign(size_t alignment, size_t size);
-void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared);
-void qemu_vfree(void *ptr);
-void qemu_anon_ram_free(void *ptr, size_t size);
-
-#define QEMU_MADV_INVALID -1
-
-#if defined(CONFIG_MADVISE)
-
-#define QEMU_MADV_WILLNEED MADV_WILLNEED
-#define QEMU_MADV_DONTNEED MADV_DONTNEED
-#ifdef MADV_DONTFORK
-#define QEMU_MADV_DONTFORK MADV_DONTFORK
-#else
-#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
-#endif
-#ifdef MADV_MERGEABLE
-#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
-#else
-#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
-#endif
-#ifdef MADV_UNMERGEABLE
-#define QEMU_MADV_UNMERGEABLE MADV_UNMERGEABLE
-#else
-#define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
-#endif
-#ifdef MADV_DODUMP
-#define QEMU_MADV_DODUMP MADV_DODUMP
-#else
-#define QEMU_MADV_DODUMP QEMU_MADV_INVALID
-#endif
-#ifdef MADV_DONTDUMP
-#define QEMU_MADV_DONTDUMP MADV_DONTDUMP
-#else
-#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
-#endif
-#ifdef MADV_HUGEPAGE
-#define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE
-#else
-#define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
-#endif
-#ifdef MADV_NOHUGEPAGE
-#define QEMU_MADV_NOHUGEPAGE MADV_NOHUGEPAGE
-#else
-#define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID
-#endif
-#ifdef MADV_REMOVE
-#define QEMU_MADV_REMOVE MADV_REMOVE
-#else
-#define QEMU_MADV_REMOVE QEMU_MADV_INVALID
-#endif
-
-#elif defined(CONFIG_POSIX_MADVISE)
-
-#define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED
-#define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED
-#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
-#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
-#define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
-#define QEMU_MADV_DODUMP QEMU_MADV_INVALID
-#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
-#define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
-#define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID
-#define QEMU_MADV_REMOVE QEMU_MADV_INVALID
-
-#else /* no-op */
-
-#define QEMU_MADV_WILLNEED QEMU_MADV_INVALID
-#define QEMU_MADV_DONTNEED QEMU_MADV_INVALID
-#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
-#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
-#define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
-#define QEMU_MADV_DODUMP QEMU_MADV_INVALID
-#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
-#define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
-#define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID
-#define QEMU_MADV_REMOVE QEMU_MADV_INVALID
-
-#endif
-
-#ifdef _WIN32
-#define HAVE_CHARDEV_SERIAL 1
-#elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
- || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
- || defined(__GLIBC__) || defined(__APPLE__)
-#define HAVE_CHARDEV_SERIAL 1
-#endif
-
-#if defined(__linux__) || defined(__FreeBSD__) || \
- defined(__FreeBSD_kernel__) || defined(__DragonFly__)
-#define HAVE_CHARDEV_PARPORT 1
-#endif
-
-#if defined(__HAIKU__)
-#define SIGIO SIGPOLL
-#endif
-
-#if defined(CONFIG_LINUX)
-#ifndef BUS_MCEERR_AR
-#define BUS_MCEERR_AR 4
-#endif
-#ifndef BUS_MCEERR_AO
-#define BUS_MCEERR_AO 5
-#endif
-#endif
-
-#if defined(__linux__) && \
- (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \
- || defined(__powerpc64__))
- /* Use 2 MiB alignment so transparent hugepages can be used by KVM.
- Valgrind does not support alignments larger than 1 MiB,
- therefore we need special code which handles running on Valgrind. */
-# define QEMU_VMALLOC_ALIGN (512 * 4096)
-#elif defined(__linux__) && defined(__s390x__)
- /* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */
-# define QEMU_VMALLOC_ALIGN (256 * 4096)
-#elif defined(__linux__) && defined(__sparc__)
-#include <sys/shm.h>
-# define QEMU_VMALLOC_ALIGN MAX(qemu_real_host_page_size, SHMLBA)
-#else
-# define QEMU_VMALLOC_ALIGN qemu_real_host_page_size
-#endif
-
-#ifdef CONFIG_POSIX
-struct qemu_signalfd_siginfo {
- uint32_t ssi_signo; /* Signal number */
- int32_t ssi_errno; /* Error number (unused) */
- int32_t ssi_code; /* Signal code */
- uint32_t ssi_pid; /* PID of sender */
- uint32_t ssi_uid; /* Real UID of sender */
- int32_t ssi_fd; /* File descriptor (SIGIO) */
- uint32_t ssi_tid; /* Kernel timer ID (POSIX timers) */
- uint32_t ssi_band; /* Band event (SIGIO) */
- uint32_t ssi_overrun; /* POSIX timer overrun count */
- uint32_t ssi_trapno; /* Trap number that caused signal */
- int32_t ssi_status; /* Exit status or signal (SIGCHLD) */
- int32_t ssi_int; /* Integer sent by sigqueue(2) */
- uint64_t ssi_ptr; /* Pointer sent by sigqueue(2) */
- uint64_t ssi_utime; /* User CPU time consumed (SIGCHLD) */
- uint64_t ssi_stime; /* System CPU time consumed (SIGCHLD) */
- uint64_t ssi_addr; /* Address that generated signal
- (for hardware-generated signals) */
- uint8_t pad[48]; /* Pad size to 128 bytes (allow for
- additional fields in the future) */
-};
-
-int qemu_signalfd(const sigset_t *mask);
-void sigaction_invoke(struct sigaction *action,
- struct qemu_signalfd_siginfo *info);
-#endif
-
-int qemu_madvise(void *addr, size_t len, int advice);
-int qemu_mprotect_rwx(void *addr, size_t size);
-int qemu_mprotect_none(void *addr, size_t size);
-
-int qemu_open(const char *name, int flags, ...);
-int qemu_close(int fd);
-int qemu_unlink(const char *name);
-#ifndef _WIN32
-int qemu_dup(int fd);
-#endif
-int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive);
-int qemu_unlock_fd(int fd, int64_t start, int64_t len);
-int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive);
-bool qemu_has_ofd_lock(void);
-
-#if defined(__HAIKU__) && defined(__i386__)
-#define FMT_pid "%ld"
-#elif defined(WIN64)
-#define FMT_pid "%" PRId64
-#else
-#define FMT_pid "%d"
-#endif
-
-bool qemu_write_pidfile(const char *pidfile, Error **errp);
-
-int qemu_get_thread_id(void);
-
-#ifndef CONFIG_IOVEC
-struct iovec {
- void *iov_base;
- size_t iov_len;
-};
-/*
- * Use the same value as Linux for now.
- */
-#define IOV_MAX 1024
-
-ssize_t readv(int fd, const struct iovec *iov, int iov_cnt);
-ssize_t writev(int fd, const struct iovec *iov, int iov_cnt);
-#else
-#include <sys/uio.h>
-#endif
-
-#ifdef _WIN32
-static inline void qemu_timersub(const struct timeval *val1,
- const struct timeval *val2,
- struct timeval *res)
-{
- res->tv_sec = val1->tv_sec - val2->tv_sec;
- if (val1->tv_usec < val2->tv_usec) {
- res->tv_sec--;
- res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
- } else {
- res->tv_usec = val1->tv_usec - val2->tv_usec;
- }
-}
-#else
-#define qemu_timersub timersub
-#endif
-
-void qemu_set_cloexec(int fd);
-
-/* Starting on QEMU 2.5, qemu_hw_version() returns "2.5+" by default
- * instead of QEMU_VERSION, so setting hw_version on MachineClass
- * is no longer mandatory.
- *
- * Do NOT change this string, or it will break compatibility on all
- * machine classes that don't set hw_version.
- */
-#define QEMU_HW_VERSION "2.5+"
-
-/* QEMU "hardware version" setting. Used to replace code that exposed
- * QEMU_VERSION to guests in the past and need to keep compatibility.
- * Do not use qemu_hw_version() in new code.
- */
-void qemu_set_hw_version(const char *);
-const char *qemu_hw_version(void);
-
-void fips_set_state(bool requested);
-bool fips_get_state(void);
-
-/* Return a dynamically allocated pathname denoting a file or directory that is
- * appropriate for storing local state.
- *
- * @relative_pathname need not start with a directory separator; one will be
- * added automatically.
- *
- * The caller is responsible for releasing the value returned with g_free()
- * after use.
- */
-char *qemu_get_local_state_pathname(const char *relative_pathname);
-
-/* Find program directory, and save it for later usage with
- * qemu_get_exec_dir().
- * Try OS specific API first, if not working, parse from argv0. */
-void qemu_init_exec_dir(const char *argv0);
-
-/* Get the saved exec dir.
- *
- * The caller is responsible for releasing the value returned with g_free()
- * after use.
- */
-char *qemu_get_exec_dir(void);
-
-/**
- * qemu_getauxval:
- * @type: the auxiliary vector key to lookup
- *
- * Search the auxiliary vector for @type, returning the value
- * or 0 if @type is not present.
- */
-unsigned long qemu_getauxval(unsigned long type);
-
-void qemu_set_tty_echo(int fd, bool echo);
-
-void os_mem_prealloc(int fd, char *area, size_t sz, int smp_cpus,
- Error **errp);
-
-/**
- * qemu_get_pid_name:
- * @pid: pid of a process
- *
- * For given @pid fetch its name. Caller is responsible for
- * freeing the string when no longer needed.
- * Returns allocated string on success, NULL on failure.
- */
-char *qemu_get_pid_name(pid_t pid);
-
-/**
- * qemu_fork:
- *
- * A version of fork that avoids signal handler race
- * conditions that can lead to child process getting
- * signals that are otherwise only expected by the
- * parent. It also resets all signal handlers to the
- * default settings.
- *
- * Returns 0 to child process, pid number to parent
- * or -1 on failure.
- */
-pid_t qemu_fork(Error **errp);
-
-/* Using intptr_t ensures that qemu_*_page_mask is sign-extended even
- * when intptr_t is 32-bit and we are aligning a long long.
- */
-extern uintptr_t qemu_real_host_page_size;
-extern intptr_t qemu_real_host_page_mask;
-
-extern int qemu_icache_linesize;
-extern int qemu_icache_linesize_log;
-extern int qemu_dcache_linesize;
-extern int qemu_dcache_linesize_log;
-
-/*
- * After using getopt or getopt_long, if you need to parse another set
- * of options, then you must reset optind. Unfortunately the way to
- * do this varies between implementations of getopt.
- */
-static inline void qemu_reset_optind(void)
-{
-#ifdef HAVE_OPTRESET
- optind = 1;
- optreset = 1;
-#else
- optind = 0;
-#endif
-}
-
-/**
- * qemu_get_host_name:
- * @errp: Error object
- *
- * Operating system agnostic way of querying host name.
- *
- * Returns allocated hostname (caller should free), NULL on failure.
- */
-char *qemu_get_host_name(Error **errp);
-
-/**
- * qemu_get_host_physmem:
- *
- * Operating system agnostic way of querying host memory.
- *
- * Returns amount of physical memory on the system. This is purely
- * advisery and may return 0 if we can't work it out. At the other
- * end we saturate to SIZE_MAX if you are lucky enough to have that
- * much memory.
- */
-size_t qemu_get_host_physmem(void);
-
-#endif
+/*
+ * OS includes and handling of OS dependencies
+ *
+ * This header exists to pull in some common system headers that
+ * most code in QEMU will want, and to fix up some possible issues with
+ * it (missing defines, Windows weirdness, and so on).
+ *
+ * To avoid getting into possible circular include dependencies, this
+ * file should not include any other QEMU headers, with the exceptions
+ * of config-host.h, config-target.h, qemu/compiler.h,
+ * sysemu/os-posix.h, sysemu/os-win32.h, glib-compat.h and
+ * qemu/typedefs.h, all of which are doing a similar job to this file
+ * and are under similar constraints.
+ *
+ * This header also contains prototypes for functions defined in
+ * os-*.c and util/oslib-*.c; those would probably be better split
+ * out into separate header files.
+ *
+ * In an ideal world this header would contain only:
+ * (1) things which everybody needs
+ * (2) things without which code would work on most platforms but
+ * fail to compile or misbehave on a minority of host OSes
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#ifndef QEMU_OSDEP_H
+#define QEMU_OSDEP_H
+
+#include "config-host.h"
+#ifdef NEED_CPU_H
+#include CONFIG_TARGET
+#else
+#include "exec/poison.h"
+#endif
+
+#include "qemu/compiler.h"
+
+/* Older versions of C++ don't get definitions of various macros from
+ * stdlib.h unless we define these macros before first inclusion of
+ * that system header.
+ */
+#ifndef __STDC_CONSTANT_MACROS
+#define __STDC_CONSTANT_MACROS
+#endif
+#ifndef __STDC_LIMIT_MACROS
+#define __STDC_LIMIT_MACROS
+#endif
+#ifndef __STDC_FORMAT_MACROS
+#define __STDC_FORMAT_MACROS
+#endif
+
+/* The following block of code temporarily renames the daemon() function so the
+ * compiler does not see the warning associated with it in stdlib.h on OSX
+ */
+#ifdef __APPLE__
+#define daemon qemu_fake_daemon_function
+#include <stdlib.h>
+#undef daemon
+extern int daemon(int, int);
+#endif
+
+#ifdef _WIN32
+/* as defined in sdkddkver.h */
+#ifndef _WIN32_WINNT
+#define _WIN32_WINNT 0x0600 /* Vista */
+#endif
+/* reduces the number of implicitly included headers */
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#endif
+
+/* enable C99/POSIX format strings (needs mingw32-runtime 3.15 or later) */
+#ifdef __MINGW32__
+#define __USE_MINGW_ANSI_STDIO 1
+#endif
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <string.h>
+#include <strings.h>
+#include <inttypes.h>
+#include <limits.h>
+/* Put unistd.h before time.h as that triggers localtime_r/gmtime_r
+ * function availability on recentish Mingw-w64 platforms. */
+#include <unistd.h>
+#include <time.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <assert.h>
+/* setjmp must be declared before sysemu/os-win32.h
+ * because it is redefined there. */
+#include <setjmp.h>
+#include <signal.h>
+
+#ifdef HAVE_SYS_SIGNAL_H
+#include <sys/signal.h>
+#endif
+
+#ifndef _WIN32
+#include <sys/wait.h>
+#else
+#define WIFEXITED(x) 1
+#define WEXITSTATUS(x) (x)
+#endif
+
+#ifdef _WIN32
+#include "sysemu/os-win32.h"
+#endif
+
+#ifdef CONFIG_POSIX
+#include "sysemu/os-posix.h"
+#endif
+
+#include "glib-compat.h"
+#include "qemu/typedefs.h"
+
+/*
+ * For mingw, as of v6.0.0, the function implementing the assert macro is
+ * not marked as noreturn, so the compiler cannot delete code following an
+ * assert(false) as unused. We rely on this within the code base to delete
+ * code that is unreachable when features are disabled.
+ * All supported versions of Glib's g_assert() satisfy this requirement.
+ */
+#ifdef __MINGW32__
+#undef assert
+#define assert(x) g_assert(x)
+#endif
+
+/*
+ * According to waitpid man page:
+ * WCOREDUMP
+ * This macro is not specified in POSIX.1-2001 and is not
+ * available on some UNIX implementations (e.g., AIX, SunOS).
+ * Therefore, enclose its use inside #ifdef WCOREDUMP ... #endif.
+ */
+#ifndef WCOREDUMP
+#define WCOREDUMP(status) 0
+#endif
+/*
+ * We have a lot of unaudited code that may fail in strange ways, or
+ * even be a security risk during migration, if you disable assertions
+ * at compile-time. You may comment out these safety checks if you
+ * absolutely want to disable assertion overhead, but it is not
+ * supported upstream so the risk is all yours. Meanwhile, please
+ * submit patches to remove any side-effects inside an assertion, or
+ * fixing error handling that should use Error instead of assert.
+ */
+#ifdef NDEBUG
+#error building with NDEBUG is not supported
+#endif
+#ifdef G_DISABLE_ASSERT
+#error building with G_DISABLE_ASSERT is not supported
+#endif
+
+#ifndef O_LARGEFILE
+#define O_LARGEFILE 0
+#endif
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+#ifndef MAP_ANONYMOUS
+#define MAP_ANONYMOUS MAP_ANON
+#endif
+#ifndef MAP_FIXED_NOREPLACE
+#define MAP_FIXED_NOREPLACE 0
+#endif
+#ifndef ENOMEDIUM
+#define ENOMEDIUM ENODEV
+#endif
+#if !defined(ENOTSUP)
+#define ENOTSUP 4096
+#endif
+#if !defined(ECANCELED)
+#define ECANCELED 4097
+#endif
+#if !defined(EMEDIUMTYPE)
+#define EMEDIUMTYPE 4098
+#endif
+#if !defined(ESHUTDOWN)
+#define ESHUTDOWN 4099
+#endif
+
+/* time_t may be either 32 or 64 bits depending on the host OS, and
+ * can be either signed or unsigned, so we can't just hardcode a
+ * specific maximum value. This is not a C preprocessor constant,
+ * so you can't use TIME_MAX in an #ifdef, but for our purposes
+ * this isn't a problem.
+ */
+
+/* The macros TYPE_SIGNED, TYPE_WIDTH, and TYPE_MAXIMUM are from
+ * Gnulib, and are under the LGPL v2.1 or (at your option) any
+ * later version.
+ */
+
+/* True if the real type T is signed. */
+#define TYPE_SIGNED(t) (!((t)0 < (t)-1))
+
+/* The width in bits of the integer type or expression T.
+ * Padding bits are not supported.
+ */
+#define TYPE_WIDTH(t) (sizeof(t) * CHAR_BIT)
+
+/* The maximum and minimum values for the integer type T. */
+#define TYPE_MAXIMUM(t) \
+ ((t) (!TYPE_SIGNED(t) \
+ ? (t)-1 \
+ : ((((t)1 << (TYPE_WIDTH(t) - 2)) - 1) * 2 + 1)))
+
+#ifndef TIME_MAX
+#define TIME_MAX TYPE_MAXIMUM(time_t)
+#endif
+
+/* HOST_LONG_BITS is the size of a native pointer in bits. */
+#if UINTPTR_MAX == UINT32_MAX
+# define HOST_LONG_BITS 32
+#elif UINTPTR_MAX == UINT64_MAX
+# define HOST_LONG_BITS 64
+#else
+# error Unknown pointer size
+#endif
+
+/* Mac OSX has a <stdint.h> bug that incorrectly defines SIZE_MAX with
+ * the wrong type. Our replacement isn't usable in preprocessor
+ * expressions, but it is sufficient for our needs. */
+#if defined(HAVE_BROKEN_SIZE_MAX) && HAVE_BROKEN_SIZE_MAX
+#undef SIZE_MAX
+#define SIZE_MAX ((size_t)-1)
+#endif
+
+/*
+ * Two variations of MIN/MAX macros. The first is for runtime use, and
+ * evaluates arguments only once (so it is safe even with side
+ * effects), but will not work in constant contexts (such as array
+ * size declarations) because of the '{}'. The second is for constant
+ * expression use, where evaluating arguments twice is safe because
+ * the result is going to be constant anyway, but will not work in a
+ * runtime context because of a void expression where a value is
+ * expected. Thus, both gcc and clang will fail to compile if you use
+ * the wrong macro (even if the error may seem a bit cryptic).
+ *
+ * Note that neither form is usable as an #if condition; if you truly
+ * need to write conditional code that depends on a minimum or maximum
+ * determined by the pre-processor instead of the compiler, you'll
+ * have to open-code it. Sadly, Coverity is severely confused by the
+ * constant variants, so we have to dumb things down there.
+ */
+#undef MIN
+#define MIN(a, b) \
+ ({ \
+ typeof(1 ? (a) : (b)) _a = (a), _b = (b); \
+ _a < _b ? _a : _b; \
+ })
+#undef MAX
+#define MAX(a, b) \
+ ({ \
+ typeof(1 ? (a) : (b)) _a = (a), _b = (b); \
+ _a > _b ? _a : _b; \
+ })
+
+#ifdef __COVERITY__
+# define MIN_CONST(a, b) ((a) < (b) ? (a) : (b))
+# define MAX_CONST(a, b) ((a) > (b) ? (a) : (b))
+#else
+# define MIN_CONST(a, b) \
+ __builtin_choose_expr( \
+ __builtin_constant_p(a) && __builtin_constant_p(b), \
+ (a) < (b) ? (a) : (b), \
+ ((void)0))
+# define MAX_CONST(a, b) \
+ __builtin_choose_expr( \
+ __builtin_constant_p(a) && __builtin_constant_p(b), \
+ (a) > (b) ? (a) : (b), \
+ ((void)0))
+#endif
+
+/*
+ * Minimum function that returns zero only if both values are zero.
+ * Intended for use with unsigned values only.
+ */
+#ifndef MIN_NON_ZERO
+#define MIN_NON_ZERO(a, b) \
+ ({ \
+ typeof(1 ? (a) : (b)) _a = (a), _b = (b); \
+ _a == 0 ? _b : (_b == 0 || _b > _a) ? _a : _b; \
+ })
+#endif
+
+/* Round number down to multiple */
+#define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m))
+
+/* Round number up to multiple. Safe when m is not a power of 2 (see
+ * ROUND_UP for a faster version when a power of 2 is guaranteed) */
+#define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))
+
+/* Check if n is a multiple of m */
+#define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0)
+
+/* n-byte align pointer down */
+#define QEMU_ALIGN_PTR_DOWN(p, n) \
+ ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n)))
+
+/* n-byte align pointer up */
+#define QEMU_ALIGN_PTR_UP(p, n) \
+ ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n)))
+
+/* Check if pointer p is n-bytes aligned */
+#define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n))
+
+/* Round number up to multiple. Requires that d be a power of 2 (see
+ * QEMU_ALIGN_UP for a safer but slower version on arbitrary
+ * numbers); works even if d is a smaller type than n. */
+#ifndef ROUND_UP
+#define ROUND_UP(n, d) (((n) + (d) - 1) & -(0 ? (n) : (d)))
+#endif
+
+#ifndef DIV_ROUND_UP
+#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
+#endif
+
+/*
+ * &(x)[0] is always a pointer - if it's same type as x then the argument is a
+ * pointer, not an array.
+ */
+#define QEMU_IS_ARRAY(x) (!__builtin_types_compatible_p(typeof(x), \
+ typeof(&(x)[0])))
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(x) ((sizeof(x) / sizeof((x)[0])) + \
+ QEMU_BUILD_BUG_ON_ZERO(!QEMU_IS_ARRAY(x)))
+#endif
+
+int qemu_daemon(int nochdir, int noclose);
+void *qemu_try_memalign(size_t alignment, size_t size);
+void *qemu_memalign(size_t alignment, size_t size);
+void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared);
+void qemu_vfree(void *ptr);
+void qemu_anon_ram_free(void *ptr, size_t size);
+
+#define QEMU_MADV_INVALID -1
+
+#if defined(CONFIG_MADVISE)
+
+#define QEMU_MADV_WILLNEED MADV_WILLNEED
+#define QEMU_MADV_DONTNEED MADV_DONTNEED
+#ifdef MADV_DONTFORK
+#define QEMU_MADV_DONTFORK MADV_DONTFORK
+#else
+#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
+#endif
+#ifdef MADV_MERGEABLE
+#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
+#else
+#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
+#endif
+#ifdef MADV_UNMERGEABLE
+#define QEMU_MADV_UNMERGEABLE MADV_UNMERGEABLE
+#else
+#define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
+#endif
+#ifdef MADV_DODUMP
+#define QEMU_MADV_DODUMP MADV_DODUMP
+#else
+#define QEMU_MADV_DODUMP QEMU_MADV_INVALID
+#endif
+#ifdef MADV_DONTDUMP
+#define QEMU_MADV_DONTDUMP MADV_DONTDUMP
+#else
+#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
+#endif
+#ifdef MADV_HUGEPAGE
+#define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE
+#else
+#define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
+#endif
+#ifdef MADV_NOHUGEPAGE
+#define QEMU_MADV_NOHUGEPAGE MADV_NOHUGEPAGE
+#else
+#define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID
+#endif
+#ifdef MADV_REMOVE
+#define QEMU_MADV_REMOVE MADV_REMOVE
+#else
+#define QEMU_MADV_REMOVE QEMU_MADV_INVALID
+#endif
+
+#elif defined(CONFIG_POSIX_MADVISE)
+
+#define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED
+#define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED
+#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
+#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
+#define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
+#define QEMU_MADV_DODUMP QEMU_MADV_INVALID
+#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
+#define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
+#define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID
+#define QEMU_MADV_REMOVE QEMU_MADV_INVALID
+
+#else /* no-op */
+
+#define QEMU_MADV_WILLNEED QEMU_MADV_INVALID
+#define QEMU_MADV_DONTNEED QEMU_MADV_INVALID
+#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
+#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
+#define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
+#define QEMU_MADV_DODUMP QEMU_MADV_INVALID
+#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
+#define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
+#define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID
+#define QEMU_MADV_REMOVE QEMU_MADV_INVALID
+
+#endif
+
+#ifdef _WIN32
+#define HAVE_CHARDEV_SERIAL 1
+#elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
+ || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
+ || defined(__GLIBC__) || defined(__APPLE__)
+#define HAVE_CHARDEV_SERIAL 1
+#endif
+
+#if defined(__linux__) || defined(__FreeBSD__) || \
+ defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+#define HAVE_CHARDEV_PARPORT 1
+#endif
+
+#if defined(__HAIKU__)
+#define SIGIO SIGPOLL
+#endif
+
+#if defined(CONFIG_LINUX)
+#ifndef BUS_MCEERR_AR
+#define BUS_MCEERR_AR 4
+#endif
+#ifndef BUS_MCEERR_AO
+#define BUS_MCEERR_AO 5
+#endif
+#endif
+
+#if defined(__linux__) && \
+ (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \
+ || defined(__powerpc64__))
+ /* Use 2 MiB alignment so transparent hugepages can be used by KVM.
+ Valgrind does not support alignments larger than 1 MiB,
+ therefore we need special code which handles running on Valgrind. */
+# define QEMU_VMALLOC_ALIGN (512 * 4096)
+#elif defined(__linux__) && defined(__s390x__)
+ /* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */
+# define QEMU_VMALLOC_ALIGN (256 * 4096)
+#elif defined(__linux__) && defined(__sparc__)
+#include <sys/shm.h>
+# define QEMU_VMALLOC_ALIGN MAX(qemu_real_host_page_size, SHMLBA)
+#else
+# define QEMU_VMALLOC_ALIGN qemu_real_host_page_size
+#endif
+
+#ifdef CONFIG_POSIX
+struct qemu_signalfd_siginfo {
+ uint32_t ssi_signo; /* Signal number */
+ int32_t ssi_errno; /* Error number (unused) */
+ int32_t ssi_code; /* Signal code */
+ uint32_t ssi_pid; /* PID of sender */
+ uint32_t ssi_uid; /* Real UID of sender */
+ int32_t ssi_fd; /* File descriptor (SIGIO) */
+ uint32_t ssi_tid; /* Kernel timer ID (POSIX timers) */
+ uint32_t ssi_band; /* Band event (SIGIO) */
+ uint32_t ssi_overrun; /* POSIX timer overrun count */
+ uint32_t ssi_trapno; /* Trap number that caused signal */
+ int32_t ssi_status; /* Exit status or signal (SIGCHLD) */
+ int32_t ssi_int; /* Integer sent by sigqueue(2) */
+ uint64_t ssi_ptr; /* Pointer sent by sigqueue(2) */
+ uint64_t ssi_utime; /* User CPU time consumed (SIGCHLD) */
+ uint64_t ssi_stime; /* System CPU time consumed (SIGCHLD) */
+ uint64_t ssi_addr; /* Address that generated signal
+ (for hardware-generated signals) */
+ uint8_t pad[48]; /* Pad size to 128 bytes (allow for
+ additional fields in the future) */
+};
+
+int qemu_signalfd(const sigset_t *mask);
+void sigaction_invoke(struct sigaction *action,
+ struct qemu_signalfd_siginfo *info);
+#endif
+
+int qemu_madvise(void *addr, size_t len, int advice);
+int qemu_mprotect_rwx(void *addr, size_t size);
+int qemu_mprotect_none(void *addr, size_t size);
+
+int qemu_open(const char *name, int flags, ...);
+int qemu_close(int fd);
+int qemu_unlink(const char *name);
+#ifndef _WIN32
+int qemu_dup(int fd);
+int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive);
+int qemu_unlock_fd(int fd, int64_t start, int64_t len);
+int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive);
+bool qemu_has_ofd_lock(void);
+#endif
+
+#if defined(__HAIKU__) && defined(__i386__)
+#define FMT_pid "%ld"
+#elif defined(WIN64)
+#define FMT_pid "%" PRId64
+#else
+#define FMT_pid "%d"
+#endif
+
+bool qemu_write_pidfile(const char *pidfile, Error **errp);
+
+int qemu_get_thread_id(void);
+
+#ifndef CONFIG_IOVEC
+struct iovec {
+ void *iov_base;
+ size_t iov_len;
+};
+/*
+ * Use the same value as Linux for now.
+ */
+#define IOV_MAX 1024
+
+ssize_t readv(int fd, const struct iovec *iov, int iov_cnt);
+ssize_t writev(int fd, const struct iovec *iov, int iov_cnt);
+#else
+#include <sys/uio.h>
+#endif
+
+#ifdef _WIN32
+static inline void qemu_timersub(const struct timeval *val1,
+ const struct timeval *val2,
+ struct timeval *res)
+{
+ res->tv_sec = val1->tv_sec - val2->tv_sec;
+ if (val1->tv_usec < val2->tv_usec) {
+ res->tv_sec--;
+ res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
+ } else {
+ res->tv_usec = val1->tv_usec - val2->tv_usec;
+ }
+}
+#else
+#define qemu_timersub timersub
+#endif
+
+void qemu_set_cloexec(int fd);
+
+/* Starting on QEMU 2.5, qemu_hw_version() returns "2.5+" by default
+ * instead of QEMU_VERSION, so setting hw_version on MachineClass
+ * is no longer mandatory.
+ *
+ * Do NOT change this string, or it will break compatibility on all
+ * machine classes that don't set hw_version.
+ */
+#define QEMU_HW_VERSION "2.5+"
+
+/* QEMU "hardware version" setting. Used to replace code that exposed
+ * QEMU_VERSION to guests in the past and need to keep compatibility.
+ * Do not use qemu_hw_version() in new code.
+ */
+void qemu_set_hw_version(const char *);
+const char *qemu_hw_version(void);
+
+void fips_set_state(bool requested);
+bool fips_get_state(void);
+
+/* Return a dynamically allocated pathname denoting a file or directory that is
+ * appropriate for storing local state.
+ *
+ * @relative_pathname need not start with a directory separator; one will be
+ * added automatically.
+ *
+ * The caller is responsible for releasing the value returned with g_free()
+ * after use.
+ */
+char *qemu_get_local_state_pathname(const char *relative_pathname);
+
+/* Find program directory, and save it for later usage with
+ * qemu_get_exec_dir().
+ * Try OS specific API first, if not working, parse from argv0. */
+void qemu_init_exec_dir(const char *argv0);
+
+/* Get the saved exec dir.
+ *
+ * The caller is responsible for releasing the value returned with g_free()
+ * after use.
+ */
+char *qemu_get_exec_dir(void);
+
+/**
+ * qemu_getauxval:
+ * @type: the auxiliary vector key to lookup
+ *
+ * Search the auxiliary vector for @type, returning the value
+ * or 0 if @type is not present.
+ */
+unsigned long qemu_getauxval(unsigned long type);
+
+void qemu_set_tty_echo(int fd, bool echo);
+
+void os_mem_prealloc(int fd, char *area, size_t sz, int smp_cpus,
+ Error **errp);
+
+/**
+ * qemu_get_pid_name:
+ * @pid: pid of a process
+ *
+ * For given @pid fetch its name. Caller is responsible for
+ * freeing the string when no longer needed.
+ * Returns allocated string on success, NULL on failure.
+ */
+char *qemu_get_pid_name(pid_t pid);
+
+/**
+ * qemu_fork:
+ *
+ * A version of fork that avoids signal handler race
+ * conditions that can lead to child process getting
+ * signals that are otherwise only expected by the
+ * parent. It also resets all signal handlers to the
+ * default settings.
+ *
+ * Returns 0 to child process, pid number to parent
+ * or -1 on failure.
+ */
+pid_t qemu_fork(Error **errp);
+
+/* Using intptr_t ensures that qemu_*_page_mask is sign-extended even
+ * when intptr_t is 32-bit and we are aligning a long long.
+ */
+extern uintptr_t qemu_real_host_page_size;
+extern intptr_t qemu_real_host_page_mask;
+
+extern int qemu_icache_linesize;
+extern int qemu_icache_linesize_log;
+extern int qemu_dcache_linesize;
+extern int qemu_dcache_linesize_log;
+
+/*
+ * After using getopt or getopt_long, if you need to parse another set
+ * of options, then you must reset optind. Unfortunately the way to
+ * do this varies between implementations of getopt.
+ */
+static inline void qemu_reset_optind(void)
+{
+#ifdef HAVE_OPTRESET
+ optind = 1;
+ optreset = 1;
+#else
+ optind = 0;
+#endif
+}
+
+/**
+ * qemu_get_host_name:
+ * @errp: Error object
+ *
+ * Operating system agnostic way of querying host name.
+ *
+ * Returns allocated hostname (caller should free), NULL on failure.
+ */
+char *qemu_get_host_name(Error **errp);
+
+/**
+ * qemu_get_host_physmem:
+ *
+ * Operating system agnostic way of querying host memory.
+ *
+ * Returns amount of physical memory on the system. This is purely
+ * advisery and may return 0 if we can't work it out. At the other
+ * end we saturate to SIZE_MAX if you are lucky enough to have that
+ * much memory.
+ */
+size_t qemu_get_host_physmem(void);
+
+#endif
--
2.28.0.windows.1
- [PATCH v3 00/12] Green the msys2 CI make, Yonggang Luo, 2020/09/03
- [PATCH v3 01/12] configure: fixes dtc not cloned when running msys2 CI, Yonggang Luo, 2020/09/03
- [PATCH v3 02/12] meson: Convert undefsym.sh to undefsym.py, Yonggang Luo, 2020/09/03
- [PATCH v3 04/12] tests: handling signal on win32 properly, Yonggang Luo, 2020/09/03
- [PATCH v3 03/12] tcg: Fixes dup_const link error, Yonggang Luo, 2020/09/03
- [PATCH v3 05/12] configure: Fix include and linkage issue on msys2, Yonggang Luo, 2020/09/03
- [PATCH v3 06/12] block: Fixes nfs on msys2/mingw, Yonggang Luo, 2020/09/03
- [PATCH v3 07/12] osdep: These function are only available on Non-Win32 system.,
Yonggang Luo <=
- [PATCH v3 09/12] stubs: qemu_notify_event have no need to stub, Yonggang Luo, 2020/09/03
- [PATCH v3 10/12] meson: Fixes qapi tests., Yonggang Luo, 2020/09/03
- [PATCH v3 08/12] ci: fixes msys2 build by upgrading capstone to 4.0.2, Yonggang Luo, 2020/09/03
- [PATCH v3 12/12] ci: Enable msys2 ci in cirrus, Yonggang Luo, 2020/09/03
- [PATCH v3 11/12] tests: Disable test-image-locking that not works under Win32, Yonggang Luo, 2020/09/03
- Re: [PATCH v3 00/12] Green the msys2 CI make, Paolo Bonzini, 2020/09/03