[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v6 3/4] linux-user: Support futex_time64
|
From: |
Alistair Francis |
|
Subject: |
[PATCH v6 3/4] linux-user: Support futex_time64 |
|
Date: |
Fri, 6 Mar 2020 10:24:28 -0800 |
Add support for host and target futex_time64. If futex_time64 exists on
the host we try that first before falling back to the standard futux
syscall.
Signed-off-by: Alistair Francis <address@hidden>
---
linux-user/syscall.c | 98 ++++++++++++++++++++++++++++++++++++--------
1 file changed, 80 insertions(+), 18 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 0f219b26c1..8a50e2d3dc 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -245,7 +245,12 @@ static type name (type1 arg1,type2 arg2,type3 arg3,type4
arg4,type5 arg5, \
#define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
#define __NR_sys_rt_tgsigqueueinfo __NR_rt_tgsigqueueinfo
#define __NR_sys_syslog __NR_syslog
-#define __NR_sys_futex __NR_futex
+#if defined(__NR_futex)
+# define __NR_sys_futex __NR_futex
+#endif
+#if defined(__NR_futex_time64)
+# define __NR_sys_futex_time64 __NR_futex_time64
+#endif
#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
@@ -295,10 +300,15 @@ _syscall1(int,exit_group,int,error_code)
#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)
+#if (defined(TARGET_NR_futex) || defined(TARGET_NR_futex_time64)) && \
+ defined(__NR_futex)
_syscall6(int,sys_futex,int *,uaddr,int,op,int,val,
const struct timespec *,timeout,int *,uaddr2,int,val3)
#endif
+#if defined(TARGET_NR_futex_time64) && defined(__NR_futex_time64)
+_syscall6(int,sys_futex_time64,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);
@@ -762,10 +772,14 @@ safe_syscall5(int, ppoll, struct pollfd *, ufds, unsigned
int, nfds,
safe_syscall6(int, epoll_pwait, int, epfd, struct epoll_event *, events,
int, maxevents, int, timeout, const sigset_t *, sigmask,
size_t, sigsetsize)
-#ifdef TARGET_NR_futex
+#if defined(__NR_futex)
safe_syscall6(int,futex,int *,uaddr,int,op,int,val, \
const struct timespec *,timeout,int *,uaddr2,int,val3)
#endif
+#if defined(__NR_futex_time64)
+safe_syscall6(int,futex_time64,int *,uaddr,int,op,int,val, \
+ const struct timespec *,timeout,int *,uaddr2,int,val3)
+#endif
safe_syscall2(int, rt_sigsuspend, sigset_t *, newset, size_t, sigsetsize)
safe_syscall2(int, kill, pid_t, pid, int, sig)
safe_syscall2(int, tkill, int, tid, int, sig)
@@ -1210,7 +1224,7 @@ static inline abi_long copy_to_user_timeval64(abi_ulong
target_tv_addr,
return 0;
}
-#if defined(TARGET_NR_futex) || \
+#if defined(TARGET_NR_futex) || defined(TARGET_NR_futex_time64) || \
defined(TARGET_NR_rt_sigtimedwait) || \
defined(TARGET_NR_pselect6) || defined(TARGET_NR_pselect6) || \
defined(TARGET_NR_nanosleep) || defined(TARGET_NR_clock_settime) || \
@@ -6898,12 +6912,12 @@ static inline abi_long host_to_target_statx(struct
target_statx *host_stx,
futexes locally would make futexes shared between multiple processes
tricky. However they're probably useless because guest atomic
operations won't work either. */
-#if defined(TARGET_NR_futex)
+#if defined(TARGET_NR_futex) || defined(TARGET_NR_futex_time64)
static int do_futex(target_ulong uaddr, int op, int val, target_ulong timeout,
target_ulong uaddr2, int val3)
{
struct timespec ts, *pts;
- int base_op;
+ int base_op, err = -ENOSYS;
/* ??? We assume FUTEX_* constants are the same on both host
and target. */
@@ -6915,18 +6929,49 @@ static int do_futex(target_ulong uaddr, int op, int
val, target_ulong timeout,
switch (base_op) {
case FUTEX_WAIT:
case FUTEX_WAIT_BITSET:
+#ifdef __NR_futex_time64
+ struct __kernel_timespec ts64, *pts64;
+
if (timeout) {
- pts = &ts;
- target_to_host_timespec(pts, timeout);
+ pts64 = &ts64;
+ target_to_host_timespec64(pts64, timeout);
} else {
- pts = NULL;
+ pts64 = NULL;
+ }
+
+ err = get_errno(safe_futex_time64(g2h(uaddr), op, tswap32(val),
+ pts64, NULL, val3));
+#endif
+#ifdef __NR_futex
+ if (err == -ENOSYS) {
+ if (timeout) {
+ pts = &ts;
+ target_to_host_timespec(pts, timeout);
+ } else {
+ pts = NULL;
+ }
+ return get_errno(safe_futex(g2h(uaddr), op, tswap32(val),
+ pts, NULL, val3));
}
- return get_errno(safe_futex(g2h(uaddr), op, tswap32(val),
- pts, NULL, val3));
+#endif
case FUTEX_WAKE:
- return get_errno(safe_futex(g2h(uaddr), op, val, NULL, NULL, 0));
+#ifdef __NR_futex_time64
+ err = get_errno(safe_futex_time64(g2h(uaddr), op, val, NULL, NULL, 0));
+#endif
+#ifdef __NR_futex
+ if (err == -ENOSYS) {
+ return get_errno(safe_futex(g2h(uaddr), op, val, NULL, NULL, 0));
+ }
+#endif
case FUTEX_FD:
- return get_errno(safe_futex(g2h(uaddr), op, val, NULL, NULL, 0));
+#ifdef __NR_futex_time64
+ err = get_errno(safe_futex_time64(g2h(uaddr), op, val, NULL, NULL, 0));
+#endif
+#ifdef __NR_futex
+ if (err == -ENOSYS) {
+ return get_errno(safe_futex(g2h(uaddr), op, val, NULL, NULL, 0));
+ }
+#endif
case FUTEX_REQUEUE:
case FUTEX_CMP_REQUEUE:
case FUTEX_WAKE_OP:
@@ -6935,12 +6980,25 @@ static int do_futex(target_ulong uaddr, int op, int
val, target_ulong timeout,
But the prototype takes a `struct timespec *'; insert casts
to satisfy the compiler. We do not need to tswap TIMEOUT
since it's not compared to guest memory. */
+#ifdef __NR_futex_time64
+ struct __kernel_timespec *pts64;
+ pts64 = (struct __kernel_timespec *)(uintptr_t) timeout;
+ ret = get_errno(safe_futex_time64(g2h(uaddr), op, val, pts64,
+ g2h(uaddr2),
+ (base_op == FUTEX_CMP_REQUEUE
+ ? tswap32(val3)
+ : val3)));
+#endif
+#ifdef __NR_futex
pts = (struct timespec *)(uintptr_t) timeout;
- return get_errno(safe_futex(g2h(uaddr), op, val, pts,
- g2h(uaddr2),
- (base_op == FUTEX_CMP_REQUEUE
- ? tswap32(val3)
- : val3)));
+ if (err == -ENOSYS) {
+ return get_errno(safe_futex(g2h(uaddr), op, val, pts,
+ g2h(uaddr2),
+ (base_op == FUTEX_CMP_REQUEUE
+ ? tswap32(val3)
+ : val3)));
+ }
+#endif
default:
return -TARGET_ENOSYS;
}
@@ -11599,6 +11657,10 @@ static abi_long do_syscall1(void *cpu_env, int num,
abi_long arg1,
case TARGET_NR_futex:
return do_futex(arg1, arg2, arg3, arg4, arg5, arg6);
#endif
+#ifdef TARGET_NR_futex_time64
+ case TARGET_NR_futex_time64:
+ return do_futex(arg1, arg2, arg3, arg4, arg5, arg6);
+#endif
#if defined(TARGET_NR_inotify_init) && defined(__NR_inotify_init)
case TARGET_NR_inotify_init:
ret = get_errno(sys_inotify_init());
--
2.25.1