From 2ad2a50a832140edfb49a95384e35bcf7a034acf Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Thu, 11 Mar 2021 21:49:44 +0100 Subject: [PATCH] syscall: disable epoll_pwait2() for now on 32bit Alternative to #18973. --- src/basic/missing_syscall.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/basic/missing_syscall.h b/src/basic/missing_syscall.h index 13843248045..8bbe4d28847 100644 --- a/src/basic/missing_syscall.h +++ b/src/basic/missing_syscall.h @@ -407,6 +407,13 @@ static inline int missing_epoll_pwait2( const sigset_t *sigset) { # if defined(__NR_epoll_pwait2) && HAVE_LINUX_TIME_TYPES_H +# if __SIZEOF_LONG__ == 4 + /* Someone with an interest in 32bit systems, please have a look at this, and figure out why + * this hangs on 32bit systems. My educated guess: might be because of issues with the + * __kernel_timespec translation or because of incorrectly sized sigset_t array. */ + errno = ENOSYS; + return -1; +# else if (timeout) { /* Convert from userspace timespec to kernel timespec */ struct __kernel_timespec ts = { @@ -417,6 +424,7 @@ static inline int missing_epoll_pwait2( return syscall(__NR_epoll_pwait2, fd, events, maxevents, &ts, sigset, sigset ? KERNEL_NSIG_BYTES : 0); } else return syscall(__NR_epoll_pwait2, fd, events, maxevents, NULL, sigset, sigset ? KERNEL_NSIG_BYTES : 0); +# endif # else errno = ENOSYS; return -1;