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Merge branch 'linux-user-for-upstream' of git://git.linaro.org/people/rikuvoipio/qemu

Browse Source 
* 'linux-user-for-upstream' of git://git.linaro.org/people/rikuvoipio/qemu:
  linux-user: register align p{read, write}64
  linux-user: ppc: mark as long long aligned
  tcg: Remove TCG_TARGET_HAS_GUEST_BASE define
  configure: Remove unnecessary host_guest_base code
  linux-user: If loading fails, print error as string, not number
  linux-user: Fix siginfo handling
  alpha-linux-user: Fix sigaltstack structure definition
  linux-user: Implement gethostname
  linux-user: Perform more checks on iovec lists
  linux-user: fix multi-threaded /proc/self/maps
  linux-user: fix statfs
This commit is contained in:
Aurelien Jarno 2012-10-19 20:28:22 +02:00
commit 41a05a4576
18 changed files with 192 additions and 148 deletions
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31
configure vendored
View File

@ -199,7 +199,7 @@ cocoa="no"
softmmu="yes"
linux_user="no"
bsd_user="no"
guest_base=""
guest_base="yes"
uname_release=""
mixemu="no"
aix="no"
@ -871,63 +871,36 @@ for opt do
esac
done
host_guest_base="no"
case "$cpu" in
sparc)
LDFLAGS="-m32 $LDFLAGS"
QEMU_CFLAGS="-m32 -mcpu=ultrasparc $QEMU_CFLAGS"
host_guest_base="yes"
;;
sparc64)
LDFLAGS="-m64 $LDFLAGS"
QEMU_CFLAGS="-m64 -mcpu=ultrasparc $QEMU_CFLAGS"
host_guest_base="yes"
;;
s390)
QEMU_CFLAGS="-m31 -march=z990 $QEMU_CFLAGS"
LDFLAGS="-m31 $LDFLAGS"
host_guest_base="yes"
;;
s390x)
QEMU_CFLAGS="-m64 -march=z990 $QEMU_CFLAGS"
LDFLAGS="-m64 $LDFLAGS"
host_guest_base="yes"
;;
i386)
QEMU_CFLAGS="-m32 $QEMU_CFLAGS"
LDFLAGS="-m32 $LDFLAGS"
cc_i386='$(CC) -m32'
host_guest_base="yes"
;;
x86_64)
QEMU_CFLAGS="-m64 $QEMU_CFLAGS"
LDFLAGS="-m64 $LDFLAGS"
cc_i386='$(CC) -m32'
host_guest_base="yes"
;;
arm*)
host_guest_base="yes"
;;
ppc*)
host_guest_base="yes"
;;
mips*)
host_guest_base="yes"
;;
ia64*)
host_guest_base="yes"
;;
hppa*)
host_guest_base="yes"
;;
unicore32*)
host_guest_base="yes"
;;
# No special flags required for other host CPUs
esac
[ -z "$guest_base" ] && guest_base="$host_guest_base"
default_target_list=""
# these targets are portable

7
linux-user/alpha/target_signal.h
View File

@ -6,9 +6,10 @@
/* this struct defines a stack used during syscall handling */
typedef struct target_sigaltstack {
abi_ulong ss_sp;
abi_long ss_flags;
abi_ulong ss_size;
abi_ulong ss_sp;
int32_t ss_flags;
int32_t dummy;
abi_ulong ss_size;
} target_stack_t;

8
linux-user/linuxload.c
View File

@ -140,8 +140,9 @@ int loader_exec(const char * filename, char ** argv, char ** envp,
bprm->p = TARGET_PAGE_SIZE*MAX_ARG_PAGES-sizeof(unsigned int);
memset(bprm->page, 0, sizeof(bprm->page));
retval = open(filename, O_RDONLY);
if (retval < 0)
return retval;
if (retval < 0) {
return -errno;
}
bprm->fd = retval;
bprm->filename = (char *)filename;
bprm->argc = count(argv);
@ -165,8 +166,7 @@ int loader_exec(const char * filename, char ** argv, char ** envp,
retval = load_flt_binary(bprm,regs,infop);
#endif
} else {
fprintf(stderr, "Unknown binary format\n");
return -1;
return -ENOEXEC;
}
}

2
linux-user/main.c
View File

@ -3574,7 +3574,7 @@ int main(int argc, char **argv, char **envp)
ret = loader_exec(filename, target_argv, target_environ, regs,
info, &bprm);
if (ret != 0) {
printf("Error %d while loading %s\n", ret, filename);
printf("Error while loading %s: %s\n", filename, strerror(-ret));
_exit(1);
}

3
linux-user/qemu.h
View File

@ -219,6 +219,9 @@ unsigned long init_guest_space(unsigned long host_start,
#include "qemu-log.h"
/* syscall.c */
int host_to_target_waitstatus(int status);
/* strace.c */
void print_syscall(int num,
abi_long arg1, abi_long arg2, abi_long arg3,

59
linux-user/signal.c
View File

@ -202,46 +202,67 @@ void target_to_host_old_sigset(sigset_t *sigset,
static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
const siginfo_t *info)
{
int sig;
sig = host_to_target_signal(info->si_signo);
int sig = host_to_target_signal(info->si_signo);
tinfo->si_signo = sig;
tinfo->si_errno = 0;
tinfo->si_code = info->si_code;
if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
sig == SIGBUS || sig == SIGTRAP) {
/* should never come here, but who knows. The information for
the target is irrelevant */
if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV
|| sig == TARGET_SIGBUS || sig == TARGET_SIGTRAP) {
/* Should never come here, but who knows. The information for
the target is irrelevant. */
tinfo->_sifields._sigfault._addr = 0;
} else if (sig == SIGIO) {
} else if (sig == TARGET_SIGIO) {
tinfo->_sifields._sigpoll._band = info->si_band;
tinfo->_sifields._sigpoll._fd = info->si_fd;
} else if (sig == TARGET_SIGCHLD) {
tinfo->_sifields._sigchld._pid = info->si_pid;
tinfo->_sifields._sigchld._uid = info->si_uid;
tinfo->_sifields._sigchld._status
= host_to_target_waitstatus(info->si_status);
tinfo->_sifields._sigchld._utime = info->si_utime;
tinfo->_sifields._sigchld._stime = info->si_stime;
} else if (sig >= TARGET_SIGRTMIN) {
tinfo->_sifields._rt._pid = info->si_pid;
tinfo->_sifields._rt._uid = info->si_uid;
/* XXX: potential problem if 64 bit */
tinfo->_sifields._rt._sigval.sival_ptr =
(abi_ulong)(unsigned long)info->si_value.sival_ptr;
tinfo->_sifields._rt._sigval.sival_ptr
= (abi_ulong)(unsigned long)info->si_value.sival_ptr;
}
}
static void tswap_siginfo(target_siginfo_t *tinfo,
const target_siginfo_t *info)
{
int sig;
sig = info->si_signo;
int sig = info->si_signo;
tinfo->si_signo = tswap32(sig);
tinfo->si_errno = tswap32(info->si_errno);
tinfo->si_code = tswap32(info->si_code);
if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
sig == SIGBUS || sig == SIGTRAP) {
tinfo->_sifields._sigfault._addr =
tswapal(info->_sifields._sigfault._addr);
} else if (sig == SIGIO) {
tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV
|| sig == TARGET_SIGBUS || sig == TARGET_SIGTRAP) {
tinfo->_sifields._sigfault._addr
= tswapal(info->_sifields._sigfault._addr);
} else if (sig == TARGET_SIGIO) {
tinfo->_sifields._sigpoll._band
= tswap32(info->_sifields._sigpoll._band);
tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
} else if (sig == TARGET_SIGCHLD) {
tinfo->_sifields._sigchld._pid
= tswap32(info->_sifields._sigchld._pid);
tinfo->_sifields._sigchld._uid
= tswap32(info->_sifields._sigchld._uid);
tinfo->_sifields._sigchld._status
= tswap32(info->_sifields._sigchld._status);
tinfo->_sifields._sigchld._utime
= tswapal(info->_sifields._sigchld._utime);
tinfo->_sifields._sigchld._stime
= tswapal(info->_sifields._sigchld._stime);
} else if (sig >= TARGET_SIGRTMIN) {
tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
tinfo->_sifields._rt._sigval.sival_ptr =
tswapal(info->_sifields._rt._sigval.sival_ptr);
tinfo->_sifields._rt._sigval.sival_ptr
= tswapal(info->_sifields._rt._sigval.sival_ptr);
}
}

204
linux-user/syscall.c
View File

@ -587,12 +587,17 @@ extern int setfsgid(int);
extern int setgroups(int, gid_t *);
/* ARM EABI and MIPS expect 64bit types aligned even on pairs or registers */
#ifdef TARGET_ARM
#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
@ -1744,55 +1749,96 @@ static abi_long do_getsockopt(int sockfd, int level, int optname,
return ret;
}
/* FIXME
* lock_iovec()/unlock_iovec() have a return code of 0 for success where
* other lock functions have a return code of 0 for failure.
*/
static abi_long lock_iovec(int type, struct iovec *vec, abi_ulong target_addr,
int count, int copy)
static struct iovec *lock_iovec(int type, abi_ulong target_addr,
int count, int copy)
{
struct target_iovec *target_vec;
abi_ulong base;
struct iovec *vec;
abi_ulong total_len, max_len;
int i;
target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
if (!target_vec)
return -TARGET_EFAULT;
for(i = 0;i < count; i++) {
base = tswapal(target_vec[i].iov_base);
vec[i].iov_len = tswapal(target_vec[i].iov_len);
if (vec[i].iov_len != 0) {
vec[i].iov_base = lock_user(type, base, vec[i].iov_len, copy);
/* Don't check lock_user return value. We must call writev even
if a element has invalid base address. */
} else {
/* zero length pointer is ignored */
vec[i].iov_base = NULL;
}
if (count == 0) {
errno = 0;
return NULL;
}
unlock_user (target_vec, target_addr, 0);
return 0;
if (count > IOV_MAX) {
errno = EINVAL;
return NULL;
}
vec = calloc(count, sizeof(struct iovec));
if (vec == NULL) {
errno = ENOMEM;
return NULL;
}
target_vec = lock_user(VERIFY_READ, target_addr,
count * sizeof(struct target_iovec), 1);
if (target_vec == NULL) {
errno = EFAULT;
goto fail2;
}
/* ??? If host page size > target page size, this will result in a
value larger than what we can actually support. */
max_len = 0x7fffffff & TARGET_PAGE_MASK;
total_len = 0;
for (i = 0; i < count; i++) {
abi_ulong base = tswapal(target_vec[i].iov_base);
abi_long len = tswapal(target_vec[i].iov_len);
if (len < 0) {
errno = EINVAL;
goto fail;
} else if (len == 0) {
/* Zero length pointer is ignored. */
vec[i].iov_base = 0;
} else {
vec[i].iov_base = lock_user(type, base, len, copy);
if (!vec[i].iov_base) {
errno = EFAULT;
goto fail;
}
if (len > max_len - total_len) {
len = max_len - total_len;
}
}
vec[i].iov_len = len;
total_len += len;
}
unlock_user(target_vec, target_addr, 0);
return vec;
fail:
free(vec);
fail2:
unlock_user(target_vec, target_addr, 0);
return NULL;
}
static abi_long unlock_iovec(struct iovec *vec, abi_ulong target_addr,
int count, int copy)
static void unlock_iovec(struct iovec *vec, abi_ulong target_addr,
int count, int copy)
{
struct target_iovec *target_vec;
abi_ulong base;
int i;
target_vec = lock_user(VERIFY_READ, target_addr, count * sizeof(struct target_iovec), 1);
if (!target_vec)
return -TARGET_EFAULT;
for(i = 0;i < count; i++) {
if (target_vec[i].iov_base) {
base = tswapal(target_vec[i].iov_base);
target_vec = lock_user(VERIFY_READ, target_addr,
count * sizeof(struct target_iovec), 1);
if (target_vec) {
for (i = 0; i < count; i++) {
abi_ulong base = tswapal(target_vec[i].iov_base);
abi_long len = tswapal(target_vec[i].iov_base);
if (len < 0) {
break;
}
unlock_user(vec[i].iov_base, base, copy ? vec[i].iov_len : 0);
}
unlock_user(target_vec, target_addr, 0);
}
unlock_user (target_vec, target_addr, 0);
return 0;
free(vec);
}
/* do_socket() Must return target values and target errnos. */
@ -1888,8 +1934,7 @@ static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg,
ret = target_to_host_sockaddr(msg.msg_name, tswapal(msgp->msg_name),
msg.msg_namelen);
if (ret) {
unlock_user_struct(msgp, target_msg, send ? 0 : 1);
return ret;
goto out2;
}
} else {
msg.msg_name = NULL;
@ -1900,9 +1945,13 @@ static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg,
msg.msg_flags = tswap32(msgp->msg_flags);
count = tswapal(msgp->msg_iovlen);
vec = alloca(count * sizeof(struct iovec));
target_vec = tswapal(msgp->msg_iov);
lock_iovec(send ? VERIFY_READ : VERIFY_WRITE, vec, target_vec, count, send);
vec = lock_iovec(send ? VERIFY_READ : VERIFY_WRITE,
target_vec, count, send);
if (vec == NULL) {
ret = -host_to_target_errno(errno);
goto out2;
}
msg.msg_iovlen = count;
msg.msg_iov = vec;
@ -1932,6 +1981,7 @@ static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg,
out:
unlock_iovec(vec, target_vec, count, !send);
out2:
unlock_user_struct(msgp, target_msg, send ? 0 : 1);
return ret;
}
@ -4873,7 +4923,7 @@ static int do_futex(target_ulong uaddr, int op, int val, target_ulong timeout,
/* Map host to target signal numbers for the wait family of syscalls.
Assume all other status bits are the same. */
static int host_to_target_waitstatus(int status)
int host_to_target_waitstatus(int status)
{
if (WIFSIGNALED(status)) {
return host_to_target_signal(WTERMSIG(status)) | (status & ~0x7f);
@ -4962,8 +5012,8 @@ static int open_self_maps(void *cpu_env, int fd)
#if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
dprintf(fd, "%08llx-%08llx rw-p %08llx 00:00 0 [stack]\n",
(unsigned long long)ts->info->stack_limit,
(unsigned long long)(ts->stack_base + (TARGET_PAGE_SIZE - 1))
& TARGET_PAGE_MASK,
(unsigned long long)(ts->info->start_stack +
(TARGET_PAGE_SIZE - 1)) & TARGET_PAGE_MASK,
(unsigned long long)0);
#endif
@ -6529,6 +6579,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
__put_user(stfs.f_fsid.__val[0], &target_stfs->f_fsid.val[0]);
__put_user(stfs.f_fsid.__val[1], &target_stfs->f_fsid.val[1]);
__put_user(stfs.f_namelen, &target_stfs->f_namelen);
__put_user(stfs.f_frsize, &target_stfs->f_frsize);
memset(target_stfs->f_spare, 0, sizeof(target_stfs->f_spare));
unlock_user_struct(target_stfs, arg2, 1);
}
break;
@ -6557,6 +6609,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
__put_user(stfs.f_fsid.__val[0], &target_stfs->f_fsid.val[0]);
__put_user(stfs.f_fsid.__val[1], &target_stfs->f_fsid.val[1]);
__put_user(stfs.f_namelen, &target_stfs->f_namelen);
__put_user(stfs.f_frsize, &target_stfs->f_frsize);
memset(target_stfs->f_spare, 0, sizeof(target_stfs->f_spare));
unlock_user_struct(target_stfs, arg3, 1);
}
break;
@ -7186,26 +7240,24 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
break;
case TARGET_NR_readv:
{
int count = arg3;
struct iovec *vec;
vec = alloca(count * sizeof(struct iovec));
if (lock_iovec(VERIFY_WRITE, vec, arg2, count, 0) < 0)
goto efault;
ret = get_errno(readv(arg1, vec, count));
unlock_iovec(vec, arg2, count, 1);
struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 0);
if (vec != NULL) {
ret = get_errno(readv(arg1, vec, arg3));
unlock_iovec(vec, arg2, arg3, 1);
} else {
ret = -host_to_target_errno(errno);
}
}
break;
case TARGET_NR_writev:
{
int count = arg3;
struct iovec *vec;
vec = alloca(count * sizeof(struct iovec));
if (lock_iovec(VERIFY_READ, vec, arg2, count, 1) < 0)
goto efault;
ret = get_errno(writev(arg1, vec, count));
unlock_iovec(vec, arg2, count, 0);
struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1);
if (vec != NULL) {
ret = get_errno(writev(arg1, vec, arg3));
unlock_iovec(vec, arg2, arg3, 0);
} else {
ret = -host_to_target_errno(errno);
}
}
break;
case TARGET_NR_getsid:
@ -7417,12 +7469,20 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#endif
#ifdef TARGET_NR_pread64
case TARGET_NR_pread64:
if (regpairs_aligned(cpu_env)) {
arg4 = arg5;
arg5 = arg6;
}
if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
goto efault;
ret = get_errno(pread64(arg1, p, arg3, target_offset64(arg4, arg5)));
unlock_user(p, arg2, ret);
break;
case TARGET_NR_pwrite64:
if (regpairs_aligned(cpu_env)) {
arg4 = arg5;
arg5 = arg6;
}
if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
goto efault;
ret = get_errno(pwrite64(arg1, p, arg3, target_offset64(arg4, arg5)));
@ -8630,14 +8690,13 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#ifdef TARGET_NR_vmsplice
case TARGET_NR_vmsplice:
{
int count = arg3;
struct iovec *vec;
vec = alloca(count * sizeof(struct iovec));
if (lock_iovec(VERIFY_READ, vec, arg2, count, 1) < 0)
goto efault;
ret = get_errno(vmsplice(arg1, vec, count, arg4));
unlock_iovec(vec, arg2, count, 0);
struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1);
if (vec != NULL) {
ret = get_errno(vmsplice(arg1, vec, arg3, arg4));
unlock_iovec(vec, arg2, arg3, 0);
} else {
ret = -host_to_target_errno(errno);
}
}
break;
#endif
@ -8823,6 +8882,19 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
}
break;
}
#endif
#ifdef TARGET_NR_gethostname
case TARGET_NR_gethostname:
{
char *name = lock_user(VERIFY_WRITE, arg1, arg2, 0);
if (name) {
ret = get_errno(gethostname(name, arg2));
unlock_user(name, arg1, arg2);
} else {
ret = -TARGET_EFAULT;
}
break;
}
#endif
default:
unimplemented:

2
tcg/arm/tcg-target.h
View File

@ -75,8 +75,6 @@ typedef enum {
#define TCG_TARGET_HAS_deposit_i32 0
#define TCG_TARGET_HAS_movcond_i32 1
#define TCG_TARGET_HAS_GUEST_BASE
enum {
TCG_AREG0 = TCG_REG_R6,
};

2
tcg/hppa/tcg-target.h
View File

@ -103,8 +103,6 @@ typedef enum {
#define TCG_TARGET_HAS_ext8u_i32 0 /* and rd, rs, 0xff */
#define TCG_TARGET_HAS_ext16u_i32 0 /* and rd, rs, 0xffff */
#define TCG_TARGET_HAS_GUEST_BASE
#define TCG_AREG0 TCG_REG_R17

2
tcg/i386/tcg-target.h
View File

@ -125,8 +125,6 @@ typedef enum {
((ofs) == 0 && (len) == 16))
#define TCG_TARGET_deposit_i64_valid TCG_TARGET_deposit_i32_valid
#define TCG_TARGET_HAS_GUEST_BASE
#if TCG_TARGET_REG_BITS == 64
# define TCG_AREG0 TCG_REG_R14
#else

3
tcg/ia64/tcg-target.h
View File

@ -147,9 +147,6 @@ typedef enum {
#define TCG_AREG0 TCG_REG_R7
/* Guest base is supported */
#define TCG_TARGET_HAS_GUEST_BASE
static inline void flush_icache_range(tcg_target_ulong start,
tcg_target_ulong stop)
{

3
tcg/mips/tcg-target.h
View File

@ -116,9 +116,6 @@ typedef enum {
#define TCG_AREG0 TCG_REG_S0
/* guest base is supported */
#define TCG_TARGET_HAS_GUEST_BASE
#ifdef __OpenBSD__
#include <machine/sysarch.h>
#else

2
tcg/ppc/tcg-target.h
View File

@ -96,8 +96,6 @@ typedef enum {
#define TCG_AREG0 TCG_REG_R27
#define TCG_TARGET_HAS_GUEST_BASE
#define tcg_qemu_tb_exec(env, tb_ptr) \
((long __attribute__ ((longcall)) \
(*)(void *, void *))code_gen_prologue)(env, tb_ptr)

1
tcg/ppc64/tcg-target.h
View File

@ -108,5 +108,4 @@ typedef enum {
#define TCG_AREG0 TCG_REG_R27
#define TCG_TARGET_HAS_GUEST_BASE
#define TCG_TARGET_EXTEND_ARGS 1

2
tcg/s390/tcg-target.h
View File

@ -88,8 +88,6 @@ typedef enum TCGReg {
#define TCG_TARGET_HAS_movcond_i64 0
#endif
#define TCG_TARGET_HAS_GUEST_BASE
/* used for function call generation */
#define TCG_REG_CALL_STACK TCG_REG_R15
#define TCG_TARGET_STACK_ALIGN 8

2
tcg/sparc/tcg-target.h
View File

@ -125,8 +125,6 @@ typedef enum {
#define TCG_TARGET_HAS_movcond_i64 1
#endif
#define TCG_TARGET_HAS_GUEST_BASE
#define TCG_AREG0 TCG_REG_I0
static inline void flush_icache_range(tcg_target_ulong start,

4
tcg/tcg.c
View File

@ -62,10 +62,6 @@
#include "elf.h"
#if defined(CONFIG_USE_GUEST_BASE) && !defined(TCG_TARGET_HAS_GUEST_BASE)
#error GUEST_BASE not supported on this host.
#endif
/* Forward declarations for functions declared in tcg-target.c and used here. */
static void tcg_target_init(TCGContext *s);
static void tcg_target_qemu_prologue(TCGContext *s);

3
tcg/tci/tcg-target.h
View File

@ -102,9 +102,6 @@
#define TCG_TARGET_HAS_movcond_i64 0
#endif /* TCG_TARGET_REG_BITS == 64 */
/* Offset to user memory in user mode. */
#define TCG_TARGET_HAS_GUEST_BASE
/* Number of registers available.
For 32 bit hosts, we need more than 8 registers (call arguments). */
/* #define TCG_TARGET_NB_REGS 8 */