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syscall.c
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/*
* Linux syscalls
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#define _ATFILE_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <elf.h>
#include <endian.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <limits.h>
#include <grp.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/file.h>
#include <sys/fsuid.h>
#include <sys/personality.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/mman.h>
#include <sys/swap.h>
#include <linux/capability.h>
#include <signal.h>
#include <sched.h>
#ifdef __ia64__
int __clone2(int (*fn)(void *), void *child_stack_base,
size_t stack_size, int flags, void *arg, ...);
#endif
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/uio.h>
#include <sys/poll.h>
#include <sys/times.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/statfs.h>
#include <utime.h>
#include <sys/sysinfo.h>
//#include <sys/user.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <linux/wireless.h>
#include <linux/icmp.h>
#include "qemu-common.h"
#ifdef TARGET_GPROF
#include <sys/gmon.h>
#endif
#ifdef CONFIG_EVENTFD
#include <sys/eventfd.h>
#endif
#ifdef CONFIG_EPOLL
#include <sys/epoll.h>
#endif
#ifdef CONFIG_ATTR
#include "qemu/xattr.h"
#endif
#ifdef CONFIG_SENDFILE
#include <sys/sendfile.h>
#endif
#define termios host_termios
#define winsize host_winsize
#define termio host_termio
#define sgttyb host_sgttyb /* same as target */
#define tchars host_tchars /* same as target */
#define ltchars host_ltchars /* same as target */
#include <linux/termios.h>
#include <linux/unistd.h>
#include <linux/cdrom.h>
#include <linux/hdreg.h>
#include <linux/soundcard.h>
#include <linux/kd.h>
#include <linux/mtio.h>
#include <linux/fs.h>
#if defined(CONFIG_FIEMAP)
#include <linux/fiemap.h>
#endif
#include <linux/fb.h>
#include <linux/vt.h>
#include <linux/dm-ioctl.h>
#include <linux/reboot.h>
#include <linux/route.h>
#include <linux/filter.h>
#include <linux/blkpg.h>
#include "linux_loop.h"
#include "uname.h"
#include "qemu.h"
#define CLONE_NPTL_FLAGS2 (CLONE_SETTLS | \
CLONE_PARENT_SETTID | CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)
//#define DEBUG
//#include <linux/msdos_fs.h>
#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct linux_dirent [2])
#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct linux_dirent [2])
#undef _syscall0
#undef _syscall1
#undef _syscall2
#undef _syscall3
#undef _syscall4
#undef _syscall5
#undef _syscall6
#define _syscall0(type,name) \
static type name (void) \
{ \
return syscall(__NR_##name); \
}
#define _syscall1(type,name,type1,arg1) \
static type name (type1 arg1) \
{ \
return syscall(__NR_##name, arg1); \
}
#define _syscall2(type,name,type1,arg1,type2,arg2) \
static type name (type1 arg1,type2 arg2) \
{ \
return syscall(__NR_##name, arg1, arg2); \
}
#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
static type name (type1 arg1,type2 arg2,type3 arg3) \
{ \
return syscall(__NR_##name, arg1, arg2, arg3); \
}
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
static type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
{ \
return syscall(__NR_##name, arg1, arg2, arg3, arg4); \
}
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5) \
static type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
{ \
return syscall(__NR_##name, arg1, arg2, arg3, arg4, arg5); \
}
#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5,type6,arg6) \
static type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5, \
type6 arg6) \
{ \
return syscall(__NR_##name, arg1, arg2, arg3, arg4, arg5, arg6); \
}
#define __NR_sys_uname __NR_uname
#define __NR_sys_getcwd1 __NR_getcwd
#define __NR_sys_getdents __NR_getdents
#define __NR_sys_getdents64 __NR_getdents64
#define __NR_sys_getpriority __NR_getpriority
#define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
#define __NR_sys_syslog __NR_syslog
#define __NR_sys_tgkill __NR_tgkill
#define __NR_sys_tkill __NR_tkill
#define __NR_sys_futex __NR_futex
#define __NR_sys_inotify_init __NR_inotify_init
#define __NR_sys_inotify_add_watch __NR_inotify_add_watch
#define __NR_sys_inotify_rm_watch __NR_inotify_rm_watch
#if defined(__alpha__) || defined (__ia64__) || defined(__x86_64__) || \
defined(__s390x__)
#define __NR__llseek __NR_lseek
#endif
/* Newer kernel ports have llseek() instead of _llseek() */
#if defined(TARGET_NR_llseek) && !defined(TARGET_NR__llseek)
#define TARGET_NR__llseek TARGET_NR_llseek
#endif
#ifdef __NR_gettid
_syscall0(int, gettid)
#else
/* This is a replacement for the host gettid() and must return a host
errno. */
static int gettid(void) {
return -ENOSYS;
}
#endif
#ifdef __NR_getdents
_syscall3(int, sys_getdents, uint, fd, struct linux_dirent *, dirp, uint, count);
#endif
#if !defined(__NR_getdents) || \
(defined(TARGET_NR_getdents64) && defined(__NR_getdents64))
_syscall3(int, sys_getdents64, uint, fd, struct linux_dirent64 *, dirp, uint, count);
#endif
#if defined(TARGET_NR__llseek) && defined(__NR_llseek)
_syscall5(int, _llseek, uint, fd, ulong, hi, ulong, lo,
loff_t *, res, uint, wh);
#endif
_syscall3(int,sys_rt_sigqueueinfo,int,pid,int,sig,siginfo_t *,uinfo)
_syscall3(int,sys_syslog,int,type,char*,bufp,int,len)
#if defined(TARGET_NR_tgkill) && defined(__NR_tgkill)
_syscall3(int,sys_tgkill,int,tgid,int,pid,int,sig)
#endif
#if defined(TARGET_NR_tkill) && defined(__NR_tkill)
_syscall2(int,sys_tkill,int,tid,int,sig)
#endif
#ifdef __NR_exit_group
_syscall1(int,exit_group,int,error_code)
#endif
#if defined(TARGET_NR_set_tid_address) && defined(__NR_set_tid_address)
_syscall1(int,set_tid_address,int *,tidptr)
#endif
#if defined(TARGET_NR_futex) && defined(__NR_futex)
_syscall6(int,sys_futex,int *,uaddr,int,op,int,val,
const struct timespec *,timeout,int *,uaddr2,int,val3)
#endif
#define __NR_sys_sched_getaffinity __NR_sched_getaffinity
_syscall3(int, sys_sched_getaffinity, pid_t, pid, unsigned int, len,
unsigned long *, user_mask_ptr);
#define __NR_sys_sched_setaffinity __NR_sched_setaffinity
_syscall3(int, sys_sched_setaffinity, pid_t, pid, unsigned int, len,
unsigned long *, user_mask_ptr);
_syscall4(int, reboot, int, magic1, int, magic2, unsigned int, cmd,
void *, arg);
_syscall2(int, capget, struct __user_cap_header_struct *, header,
struct __user_cap_data_struct *, data);
_syscall2(int, capset, struct __user_cap_header_struct *, header,
struct __user_cap_data_struct *, data);
static bitmask_transtbl fcntl_flags_tbl[] = {
{ TARGET_O_ACCMODE, TARGET_O_WRONLY, O_ACCMODE, O_WRONLY, },
{ TARGET_O_ACCMODE, TARGET_O_RDWR, O_ACCMODE, O_RDWR, },
{ TARGET_O_CREAT, TARGET_O_CREAT, O_CREAT, O_CREAT, },
{ TARGET_O_EXCL, TARGET_O_EXCL, O_EXCL, O_EXCL, },
{ TARGET_O_NOCTTY, TARGET_O_NOCTTY, O_NOCTTY, O_NOCTTY, },
{ TARGET_O_TRUNC, TARGET_O_TRUNC, O_TRUNC, O_TRUNC, },
{ TARGET_O_APPEND, TARGET_O_APPEND, O_APPEND, O_APPEND, },
{ TARGET_O_NONBLOCK, TARGET_O_NONBLOCK, O_NONBLOCK, O_NONBLOCK, },
{ TARGET_O_SYNC, TARGET_O_DSYNC, O_SYNC, O_DSYNC, },
{ TARGET_O_SYNC, TARGET_O_SYNC, O_SYNC, O_SYNC, },
{ TARGET_FASYNC, TARGET_FASYNC, FASYNC, FASYNC, },
{ TARGET_O_DIRECTORY, TARGET_O_DIRECTORY, O_DIRECTORY, O_DIRECTORY, },
{ TARGET_O_NOFOLLOW, TARGET_O_NOFOLLOW, O_NOFOLLOW, O_NOFOLLOW, },
#if defined(O_DIRECT)
{ TARGET_O_DIRECT, TARGET_O_DIRECT, O_DIRECT, O_DIRECT, },
#endif
#if defined(O_NOATIME)
{ TARGET_O_NOATIME, TARGET_O_NOATIME, O_NOATIME, O_NOATIME },
#endif
#if defined(O_CLOEXEC)
{ TARGET_O_CLOEXEC, TARGET_O_CLOEXEC, O_CLOEXEC, O_CLOEXEC },
#endif
#if defined(O_PATH)
{ TARGET_O_PATH, TARGET_O_PATH, O_PATH, O_PATH },
#endif
/* Don't terminate the list prematurely on 64-bit host+guest. */
#if TARGET_O_LARGEFILE != 0 || O_LARGEFILE != 0
{ TARGET_O_LARGEFILE, TARGET_O_LARGEFILE, O_LARGEFILE, O_LARGEFILE, },
#endif
{ 0, 0, 0, 0 }
};
static int sys_getcwd1(char *buf, size_t size)
{
if (getcwd(buf, size) == NULL) {
/* getcwd() sets errno */
return (-1);
}
return strlen(buf)+1;
}
#ifdef TARGET_NR_openat
static int sys_openat(int dirfd, const char *pathname, int flags, mode_t mode)
{
/*
* open(2) has extra parameter 'mode' when called with
* flag O_CREAT.
*/
if ((flags & O_CREAT) != 0) {
return (openat(dirfd, pathname, flags, mode));
}
return (openat(dirfd, pathname, flags));
}
#endif
#ifdef TARGET_NR_utimensat
#ifdef CONFIG_UTIMENSAT
static int sys_utimensat(int dirfd, const char *pathname,
const struct timespec times[2], int flags)
{
if (pathname == NULL)
return futimens(dirfd, times);
else
return utimensat(dirfd, pathname, times, flags);
}
#elif defined(__NR_utimensat)
#define __NR_sys_utimensat __NR_utimensat
_syscall4(int,sys_utimensat,int,dirfd,const char *,pathname,
const struct timespec *,tsp,int,flags)
#else
static int sys_utimensat(int dirfd, const char *pathname,
const struct timespec times[2], int flags)
{
errno = ENOSYS;
return -1;
}
#endif
#endif /* TARGET_NR_utimensat */
#ifdef CONFIG_INOTIFY
#include <sys/inotify.h>
#if defined(TARGET_NR_inotify_init) && defined(__NR_inotify_init)
static int sys_inotify_init(void)
{
return (inotify_init());
}
#endif
#if defined(TARGET_NR_inotify_add_watch) && defined(__NR_inotify_add_watch)
static int sys_inotify_add_watch(int fd,const char *pathname, int32_t mask)
{
return (inotify_add_watch(fd, pathname, mask));
}
#endif
#if defined(TARGET_NR_inotify_rm_watch) && defined(__NR_inotify_rm_watch)
static int sys_inotify_rm_watch(int fd, int32_t wd)
{
return (inotify_rm_watch(fd, wd));
}
#endif
#ifdef CONFIG_INOTIFY1
#if defined(TARGET_NR_inotify_init1) && defined(__NR_inotify_init1)
static int sys_inotify_init1(int flags)
{
return (inotify_init1(flags));
}
#endif
#endif
#else
/* Userspace can usually survive runtime without inotify */
#undef TARGET_NR_inotify_init
#undef TARGET_NR_inotify_init1
#undef TARGET_NR_inotify_add_watch
#undef TARGET_NR_inotify_rm_watch
#endif /* CONFIG_INOTIFY */
#if defined(TARGET_NR_ppoll)
#ifndef __NR_ppoll
# define __NR_ppoll -1
#endif
#define __NR_sys_ppoll __NR_ppoll
_syscall5(int, sys_ppoll, struct pollfd *, fds, nfds_t, nfds,
struct timespec *, timeout, const sigset_t *, sigmask,
size_t, sigsetsize)
#endif
#if defined(TARGET_NR_pselect6)
#ifndef __NR_pselect6
# define __NR_pselect6 -1
#endif
#define __NR_sys_pselect6 __NR_pselect6
_syscall6(int, sys_pselect6, int, nfds, fd_set *, readfds, fd_set *, writefds,
fd_set *, exceptfds, struct timespec *, timeout, void *, sig);
#endif
#if defined(TARGET_NR_prlimit64)
#ifndef __NR_prlimit64
# define __NR_prlimit64 -1
#endif
#define __NR_sys_prlimit64 __NR_prlimit64
/* The glibc rlimit structure may not be that used by the underlying syscall */
struct host_rlimit64 {
uint64_t rlim_cur;
uint64_t rlim_max;
};
_syscall4(int, sys_prlimit64, pid_t, pid, int, resource,
const struct host_rlimit64 *, new_limit,
struct host_rlimit64 *, old_limit)
#endif
#if defined(TARGET_NR_timer_create)
/* Maxiumum of 32 active POSIX timers allowed at any one time. */
static timer_t g_posix_timers[32] = { 0, } ;
static inline int next_free_host_timer(void)
{
int k ;
/* FIXME: Does finding the next free slot require a lock? */
for (k = 0; k < ARRAY_SIZE(g_posix_timers); k++) {
if (g_posix_timers[k] == 0) {
g_posix_timers[k] = (timer_t) 1;
return k;
}
}
return -1;
}
#endif
/* ARM EABI and MIPS expect 64bit types aligned even on pairs or registers */
#ifdef TARGET_ARM
static inline int regpairs_aligned(void *cpu_env) {
return ((((CPUARMState *)cpu_env)->eabi) == 1) ;
}
#elif defined(TARGET_MIPS)
static inline int regpairs_aligned(void *cpu_env) { return 1; }
#elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
/* SysV AVI for PPC32 expects 64bit parameters to be passed on odd/even pairs
* of registers which translates to the same as ARM/MIPS, because we start with
* r3 as arg1 */
static inline int regpairs_aligned(void *cpu_env) { return 1; }
#else
static inline int regpairs_aligned(void *cpu_env) { return 0; }
#endif
#define ERRNO_TABLE_SIZE 1200
/* target_to_host_errno_table[] is initialized from
* host_to_target_errno_table[] in syscall_init(). */
static uint16_t target_to_host_errno_table[ERRNO_TABLE_SIZE] = {
};
/*
* This list is the union of errno values overridden in asm-<arch>/errno.h
* minus the errnos that are not actually generic to all archs.
*/
static uint16_t host_to_target_errno_table[ERRNO_TABLE_SIZE] = {
[EIDRM] = TARGET_EIDRM,
[ECHRNG] = TARGET_ECHRNG,
[EL2NSYNC] = TARGET_EL2NSYNC,
[EL3HLT] = TARGET_EL3HLT,
[EL3RST] = TARGET_EL3RST,
[ELNRNG] = TARGET_ELNRNG,
[EUNATCH] = TARGET_EUNATCH,
[ENOCSI] = TARGET_ENOCSI,
[EL2HLT] = TARGET_EL2HLT,
[EDEADLK] = TARGET_EDEADLK,
[ENOLCK] = TARGET_ENOLCK,
[EBADE] = TARGET_EBADE,
[EBADR] = TARGET_EBADR,
[EXFULL] = TARGET_EXFULL,
[ENOANO] = TARGET_ENOANO,
[EBADRQC] = TARGET_EBADRQC,
[EBADSLT] = TARGET_EBADSLT,
[EBFONT] = TARGET_EBFONT,
[ENOSTR] = TARGET_ENOSTR,
[ENODATA] = TARGET_ENODATA,
[ETIME] = TARGET_ETIME,
[ENOSR] = TARGET_ENOSR,
[ENONET] = TARGET_ENONET,
[ENOPKG] = TARGET_ENOPKG,
[EREMOTE] = TARGET_EREMOTE,
[ENOLINK] = TARGET_ENOLINK,
[EADV] = TARGET_EADV,
[ESRMNT] = TARGET_ESRMNT,
[ECOMM] = TARGET_ECOMM,
[EPROTO] = TARGET_EPROTO,
[EDOTDOT] = TARGET_EDOTDOT,
[EMULTIHOP] = TARGET_EMULTIHOP,
[EBADMSG] = TARGET_EBADMSG,
[ENAMETOOLONG] = TARGET_ENAMETOOLONG,
[EOVERFLOW] = TARGET_EOVERFLOW,
[ENOTUNIQ] = TARGET_ENOTUNIQ,
[EBADFD] = TARGET_EBADFD,
[EREMCHG] = TARGET_EREMCHG,
[ELIBACC] = TARGET_ELIBACC,
[ELIBBAD] = TARGET_ELIBBAD,
[ELIBSCN] = TARGET_ELIBSCN,
[ELIBMAX] = TARGET_ELIBMAX,
[ELIBEXEC] = TARGET_ELIBEXEC,
[EILSEQ] = TARGET_EILSEQ,
[ENOSYS] = TARGET_ENOSYS,
[ELOOP] = TARGET_ELOOP,
[ERESTART] = TARGET_ERESTART,
[ESTRPIPE] = TARGET_ESTRPIPE,
[ENOTEMPTY] = TARGET_ENOTEMPTY,
[EUSERS] = TARGET_EUSERS,
[ENOTSOCK] = TARGET_ENOTSOCK,
[EDESTADDRREQ] = TARGET_EDESTADDRREQ,
[EMSGSIZE] = TARGET_EMSGSIZE,
[EPROTOTYPE] = TARGET_EPROTOTYPE,
[ENOPROTOOPT] = TARGET_ENOPROTOOPT,
[EPROTONOSUPPORT] = TARGET_EPROTONOSUPPORT,
[ESOCKTNOSUPPORT] = TARGET_ESOCKTNOSUPPORT,
[EOPNOTSUPP] = TARGET_EOPNOTSUPP,
[EPFNOSUPPORT] = TARGET_EPFNOSUPPORT,
[EAFNOSUPPORT] = TARGET_EAFNOSUPPORT,
[EADDRINUSE] = TARGET_EADDRINUSE,
[EADDRNOTAVAIL] = TARGET_EADDRNOTAVAIL,
[ENETDOWN] = TARGET_ENETDOWN,
[ENETUNREACH] = TARGET_ENETUNREACH,
[ENETRESET] = TARGET_ENETRESET,
[ECONNABORTED] = TARGET_ECONNABORTED,
[ECONNRESET] = TARGET_ECONNRESET,
[ENOBUFS] = TARGET_ENOBUFS,
[EISCONN] = TARGET_EISCONN,
[ENOTCONN] = TARGET_ENOTCONN,
[EUCLEAN] = TARGET_EUCLEAN,
[ENOTNAM] = TARGET_ENOTNAM,
[ENAVAIL] = TARGET_ENAVAIL,
[EISNAM] = TARGET_EISNAM,
[EREMOTEIO] = TARGET_EREMOTEIO,
[ESHUTDOWN] = TARGET_ESHUTDOWN,
[ETOOMANYREFS] = TARGET_ETOOMANYREFS,
[ETIMEDOUT] = TARGET_ETIMEDOUT,
[ECONNREFUSED] = TARGET_ECONNREFUSED,
[EHOSTDOWN] = TARGET_EHOSTDOWN,
[EHOSTUNREACH] = TARGET_EHOSTUNREACH,
[EALREADY] = TARGET_EALREADY,
[EINPROGRESS] = TARGET_EINPROGRESS,
[ESTALE] = TARGET_ESTALE,
[ECANCELED] = TARGET_ECANCELED,
[ENOMEDIUM] = TARGET_ENOMEDIUM,
[EMEDIUMTYPE] = TARGET_EMEDIUMTYPE,
#ifdef ENOKEY
[ENOKEY] = TARGET_ENOKEY,
#endif
#ifdef EKEYEXPIRED
[EKEYEXPIRED] = TARGET_EKEYEXPIRED,
#endif
#ifdef EKEYREVOKED
[EKEYREVOKED] = TARGET_EKEYREVOKED,
#endif
#ifdef EKEYREJECTED
[EKEYREJECTED] = TARGET_EKEYREJECTED,
#endif
#ifdef EOWNERDEAD
[EOWNERDEAD] = TARGET_EOWNERDEAD,
#endif
#ifdef ENOTRECOVERABLE
[ENOTRECOVERABLE] = TARGET_ENOTRECOVERABLE,
#endif
};
static inline int host_to_target_errno(int err)
{
if(host_to_target_errno_table[err])
return host_to_target_errno_table[err];
return err;
}
static inline int target_to_host_errno(int err)
{
if (target_to_host_errno_table[err])
return target_to_host_errno_table[err];
return err;
}
static inline abi_long get_errno(abi_long ret)
{
if (ret == -1)
return -host_to_target_errno(errno);
else
return ret;
}
static inline int is_error(abi_long ret)
{
return (abi_ulong)ret >= (abi_ulong)(-4096);
}
char *target_strerror(int err)
{
if ((err >= ERRNO_TABLE_SIZE) || (err < 0)) {
return NULL;
}
return strerror(target_to_host_errno(err));
}
static abi_ulong target_brk;
static abi_ulong target_original_brk;
static abi_ulong brk_page;
void target_set_brk(abi_ulong new_brk)
{
target_original_brk = target_brk = HOST_PAGE_ALIGN(new_brk);
brk_page = HOST_PAGE_ALIGN(target_brk);
}
//#define DEBUGF_BRK(message, args...) do { fprintf(stderr, (message), ## args); } while (0)
#define DEBUGF_BRK(message, args...)
/* do_brk() must return target values and target errnos. */
abi_long do_brk(abi_ulong new_brk)
{
abi_long mapped_addr;
int new_alloc_size;
DEBUGF_BRK("do_brk(" TARGET_ABI_FMT_lx ") -> ", new_brk);
if (!new_brk) {
DEBUGF_BRK(TARGET_ABI_FMT_lx " (!new_brk)\n", target_brk);
return target_brk;
}
if (new_brk < target_original_brk) {
DEBUGF_BRK(TARGET_ABI_FMT_lx " (new_brk < target_original_brk)\n",
target_brk);
return target_brk;
}
/* If the new brk is less than the highest page reserved to the
* target heap allocation, set it and we're almost done... */
if (new_brk <= brk_page) {
/* Heap contents are initialized to zero, as for anonymous
* mapped pages. */
if (new_brk > target_brk) {
memset(g2h(target_brk), 0, new_brk - target_brk);
}
target_brk = new_brk;
DEBUGF_BRK(TARGET_ABI_FMT_lx " (new_brk <= brk_page)\n", target_brk);
return target_brk;
}
/* We need to allocate more memory after the brk... Note that
* we don't use MAP_FIXED because that will map over the top of
* any existing mapping (like the one with the host libc or qemu
* itself); instead we treat "mapped but at wrong address" as
* a failure and unmap again.
*/
new_alloc_size = HOST_PAGE_ALIGN(new_brk - brk_page);
mapped_addr = get_errno(target_mmap(brk_page, new_alloc_size,
PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, 0, 0));
if (mapped_addr == brk_page) {
/* Heap contents are initialized to zero, as for anonymous
* mapped pages. Technically the new pages are already
* initialized to zero since they *are* anonymous mapped
* pages, however we have to take care with the contents that
* come from the remaining part of the previous page: it may
* contains garbage data due to a previous heap usage (grown
* then shrunken). */
memset(g2h(target_brk), 0, brk_page - target_brk);
target_brk = new_brk;
brk_page = HOST_PAGE_ALIGN(target_brk);
DEBUGF_BRK(TARGET_ABI_FMT_lx " (mapped_addr == brk_page)\n",
target_brk);
return target_brk;
} else if (mapped_addr != -1) {
/* Mapped but at wrong address, meaning there wasn't actually
* enough space for this brk.
*/
target_munmap(mapped_addr, new_alloc_size);
mapped_addr = -1;
DEBUGF_BRK(TARGET_ABI_FMT_lx " (mapped_addr != -1)\n", target_brk);
}
else {
DEBUGF_BRK(TARGET_ABI_FMT_lx " (otherwise)\n", target_brk);
}
#if defined(TARGET_ALPHA)
/* We (partially) emulate OSF/1 on Alpha, which requires we
return a proper errno, not an unchanged brk value. */
return -TARGET_ENOMEM;
#endif
/* For everything else, return the previous break. */
return target_brk;
}
static inline abi_long copy_from_user_fdset(fd_set *fds,
abi_ulong target_fds_addr,
int n)
{
int i, nw, j, k;
abi_ulong b, *target_fds;
nw = (n + TARGET_ABI_BITS - 1) / TARGET_ABI_BITS;
if (!(target_fds = lock_user(VERIFY_READ,
target_fds_addr,
sizeof(abi_ulong) * nw,
1)))
return -TARGET_EFAULT;
FD_ZERO(fds);
k = 0;
for (i = 0; i < nw; i++) {
/* grab the abi_ulong */
__get_user(b, &target_fds[i]);
for (j = 0; j < TARGET_ABI_BITS; j++) {
/* check the bit inside the abi_ulong */
if ((b >> j) & 1)
FD_SET(k, fds);
k++;
}
}
unlock_user(target_fds, target_fds_addr, 0);
return 0;
}
static inline abi_ulong copy_from_user_fdset_ptr(fd_set *fds, fd_set **fds_ptr,
abi_ulong target_fds_addr,
int n)
{
if (target_fds_addr) {
if (copy_from_user_fdset(fds, target_fds_addr, n))
return -TARGET_EFAULT;
*fds_ptr = fds;
} else {
*fds_ptr = NULL;
}
return 0;
}
static inline abi_long copy_to_user_fdset(abi_ulong target_fds_addr,
const fd_set *fds,
int n)
{
int i, nw, j, k;
abi_long v;
abi_ulong *target_fds;
nw = (n + TARGET_ABI_BITS - 1) / TARGET_ABI_BITS;
if (!(target_fds = lock_user(VERIFY_WRITE,
target_fds_addr,
sizeof(abi_ulong) * nw,
0)))
return -TARGET_EFAULT;
k = 0;
for (i = 0; i < nw; i++) {
v = 0;
for (j = 0; j < TARGET_ABI_BITS; j++) {
v |= ((abi_ulong)(FD_ISSET(k, fds) != 0) << j);
k++;
}
__put_user(v, &target_fds[i]);
}
unlock_user(target_fds, target_fds_addr, sizeof(abi_ulong) * nw);
return 0;
}
#if defined(__alpha__)
#define HOST_HZ 1024
#else
#define HOST_HZ 100
#endif
static inline abi_long host_to_target_clock_t(long ticks)
{
#if HOST_HZ == TARGET_HZ
return ticks;
#else
return ((int64_t)ticks * TARGET_HZ) / HOST_HZ;
#endif
}
static inline abi_long host_to_target_rusage(abi_ulong target_addr,
const struct rusage *rusage)
{
struct target_rusage *target_rusage;
if (!lock_user_struct(VERIFY_WRITE, target_rusage, target_addr, 0))
return -TARGET_EFAULT;
target_rusage->ru_utime.tv_sec = tswapal(rusage->ru_utime.tv_sec);
target_rusage->ru_utime.tv_usec = tswapal(rusage->ru_utime.tv_usec);
target_rusage->ru_stime.tv_sec = tswapal(rusage->ru_stime.tv_sec);
target_rusage->ru_stime.tv_usec = tswapal(rusage->ru_stime.tv_usec);
target_rusage->ru_maxrss = tswapal(rusage->ru_maxrss);
target_rusage->ru_ixrss = tswapal(rusage->ru_ixrss);
target_rusage->ru_idrss = tswapal(rusage->ru_idrss);
target_rusage->ru_isrss = tswapal(rusage->ru_isrss);
target_rusage->ru_minflt = tswapal(rusage->ru_minflt);
target_rusage->ru_majflt = tswapal(rusage->ru_majflt);
target_rusage->ru_nswap = tswapal(rusage->ru_nswap);
target_rusage->ru_inblock = tswapal(rusage->ru_inblock);
target_rusage->ru_oublock = tswapal(rusage->ru_oublock);
target_rusage->ru_msgsnd = tswapal(rusage->ru_msgsnd);
target_rusage->ru_msgrcv = tswapal(rusage->ru_msgrcv);
target_rusage->ru_nsignals = tswapal(rusage->ru_nsignals);
target_rusage->ru_nvcsw = tswapal(rusage->ru_nvcsw);
target_rusage->ru_nivcsw = tswapal(rusage->ru_nivcsw);
unlock_user_struct(target_rusage, target_addr, 1);
return 0;
}
static inline rlim_t target_to_host_rlim(abi_ulong target_rlim)
{
abi_ulong target_rlim_swap;
rlim_t result;
target_rlim_swap = tswapal(target_rlim);
if (target_rlim_swap == TARGET_RLIM_INFINITY)
return RLIM_INFINITY;
result = target_rlim_swap;
if (target_rlim_swap != (rlim_t)result)
return RLIM_INFINITY;
return result;
}
static inline abi_ulong host_to_target_rlim(rlim_t rlim)
{
abi_ulong target_rlim_swap;
abi_ulong result;
if (rlim == RLIM_INFINITY || rlim != (abi_long)rlim)
target_rlim_swap = TARGET_RLIM_INFINITY;
else
target_rlim_swap = rlim;
result = tswapal(target_rlim_swap);
return result;
}
static inline int target_to_host_resource(int code)
{
switch (code) {
case TARGET_RLIMIT_AS:
return RLIMIT_AS;
case TARGET_RLIMIT_CORE:
return RLIMIT_CORE;
case TARGET_RLIMIT_CPU:
return RLIMIT_CPU;
case TARGET_RLIMIT_DATA:
return RLIMIT_DATA;
case TARGET_RLIMIT_FSIZE:
return RLIMIT_FSIZE;
case TARGET_RLIMIT_LOCKS:
return RLIMIT_LOCKS;
case TARGET_RLIMIT_MEMLOCK:
return RLIMIT_MEMLOCK;
case TARGET_RLIMIT_MSGQUEUE:
return RLIMIT_MSGQUEUE;
case TARGET_RLIMIT_NICE:
return RLIMIT_NICE;
case TARGET_RLIMIT_NOFILE:
return RLIMIT_NOFILE;
case TARGET_RLIMIT_NPROC:
return RLIMIT_NPROC;
case TARGET_RLIMIT_RSS:
return RLIMIT_RSS;
case TARGET_RLIMIT_RTPRIO:
return RLIMIT_RTPRIO;
case TARGET_RLIMIT_SIGPENDING:
return RLIMIT_SIGPENDING;
case TARGET_RLIMIT_STACK:
return RLIMIT_STACK;
default:
return code;
}
}
static inline abi_long copy_from_user_timeval(struct timeval *tv,
abi_ulong target_tv_addr)
{
struct target_timeval *target_tv;
if (!lock_user_struct(VERIFY_READ, target_tv, target_tv_addr, 1))
return -TARGET_EFAULT;
__get_user(tv->tv_sec, &target_tv->tv_sec);
__get_user(tv->tv_usec, &target_tv->tv_usec);
unlock_user_struct(target_tv, target_tv_addr, 0);
return 0;
}
static inline abi_long copy_to_user_timeval(abi_ulong target_tv_addr,
const struct timeval *tv)
{
struct target_timeval *target_tv;
if (!lock_user_struct(VERIFY_WRITE, target_tv, target_tv_addr, 0))
return -TARGET_EFAULT;
__put_user(tv->tv_sec, &target_tv->tv_sec);
__put_user(tv->tv_usec, &target_tv->tv_usec);
unlock_user_struct(target_tv, target_tv_addr, 1);
return 0;
}
#if defined(TARGET_NR_mq_open) && defined(__NR_mq_open)
#include <mqueue.h>
static inline abi_long copy_from_user_mq_attr(struct mq_attr *attr,
abi_ulong target_mq_attr_addr)
{
struct target_mq_attr *target_mq_attr;
if (!lock_user_struct(VERIFY_READ, target_mq_attr,
target_mq_attr_addr, 1))
return -TARGET_EFAULT;
__get_user(attr->mq_flags, &target_mq_attr->mq_flags);
__get_user(attr->mq_maxmsg, &target_mq_attr->mq_maxmsg);
__get_user(attr->mq_msgsize, &target_mq_attr->mq_msgsize);
__get_user(attr->mq_curmsgs, &target_mq_attr->mq_curmsgs);
unlock_user_struct(target_mq_attr, target_mq_attr_addr, 0);
return 0;
}
static inline abi_long copy_to_user_mq_attr(abi_ulong target_mq_attr_addr,
const struct mq_attr *attr)
{
struct target_mq_attr *target_mq_attr;
if (!lock_user_struct(VERIFY_WRITE, target_mq_attr,
target_mq_attr_addr, 0))
return -TARGET_EFAULT;
__put_user(attr->mq_flags, &target_mq_attr->mq_flags);
__put_user(attr->mq_maxmsg, &target_mq_attr->mq_maxmsg);
__put_user(attr->mq_msgsize, &target_mq_attr->mq_msgsize);
__put_user(attr->mq_curmsgs, &target_mq_attr->mq_curmsgs);
unlock_user_struct(target_mq_attr, target_mq_attr_addr, 1);
return 0;
}
#endif
#if defined(TARGET_NR_select) || defined(TARGET_NR__newselect)
/* do_select() must return target values and target errnos. */
static abi_long do_select(int n,
abi_ulong rfd_addr, abi_ulong wfd_addr,
abi_ulong efd_addr, abi_ulong target_tv_addr)
{
fd_set rfds, wfds, efds;
fd_set *rfds_ptr, *wfds_ptr, *efds_ptr;
struct timeval tv, *tv_ptr;
abi_long ret;
ret = copy_from_user_fdset_ptr(&rfds, &rfds_ptr, rfd_addr, n);
if (ret) {
return ret;
}
ret = copy_from_user_fdset_ptr(&wfds, &wfds_ptr, wfd_addr, n);
if (ret) {
return ret;
}
ret = copy_from_user_fdset_ptr(&efds, &efds_ptr, efd_addr, n);
if (ret) {
return ret;
}
if (target_tv_addr) {
if (copy_from_user_timeval(&tv, target_tv_addr))
return -TARGET_EFAULT;
tv_ptr = &tv;
} else {
tv_ptr = NULL;
}
ret = get_errno(select(n, rfds_ptr, wfds_ptr, efds_ptr, tv_ptr));
if (!is_error(ret)) {
if (rfd_addr && copy_to_user_fdset(rfd_addr, &rfds, n))
return -TARGET_EFAULT;
if (wfd_addr && copy_to_user_fdset(wfd_addr, &wfds, n))
return -TARGET_EFAULT;
if (efd_addr && copy_to_user_fdset(efd_addr, &efds, n))
return -TARGET_EFAULT;
if (target_tv_addr && copy_to_user_timeval(target_tv_addr, &tv))
return -TARGET_EFAULT;
}
return ret;
}
#endif
static abi_long do_pipe2(int host_pipe[], int flags)
{