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Message-ID: <3754277.KmO9Nk3XLD@wuerfel> Date: Tue, 17 Nov 2015 22:57:52 +0100 From: Arnd Bergmann <arnd@...db.de> To: Yury Norov <ynorov@...iumnetworks.com> Cc: catalin.marinas@....com, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, pinskia@...il.com, ddaney.cavm@...il.com, jan.dakinevich@...il.com, Prasun.Kapoor@...iumnetworks.com, christoph.muellner@...obroma-systems.com, philipp.tomsich@...obroma-systems.com, broonie@...nel.org, andrey.konovalov@...aro.org, Nathan_Lynch@...tor.com, agraf@...e.de, bamvor.zhangjian@...wei.com, klimov.linux@...il.com, joseph@...esourcery.com, schwab@...e.de Subject: Re: [PATCH v6 14/19] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it On Wednesday 18 November 2015 00:16:54 Yury Norov wrote: > From: Andrew Pinski <apinski@...ium.com> > > Add a separate syscall-table for ILP32, which dispatches either to native > LP64 system call implementation or to compat-syscalls, as appropriate. I like it much better than the previous version, thanks for the rework! However, it seems that you accidentally have a lot more redirects than you should have: > +/* Using non-compat syscalls where necessary */ > +#define compat_sys_fadvise64_64 sys_fadvise64_64 > +#define compat_sys_fallocate sys_fallocate > +#define compat_sys_ftruncate64 sys_ftruncate > +#define compat_sys_pread64 sys_pread64 > +#define compat_sys_pwrite64 sys_pwrite64 > +#define compat_sys_readahead sys_readahead Makes sense. These of course all require the respective changes in glibc as discussed in the thread regarding loff_t handling. > +#define compat_sys_rt_sigaction sys_rt_sigaction > +#define compat_sys_shmat sys_shmat What's special about compat_sys_shmat? > +#define compat_sys_sync_file_range sys_sync_file_range > +#define compat_sys_truncate64 sys_truncate > +#define compat_sys_sigaltstack sys_sigaltstack > + > +#define compat_sys_io_getevents sys_io_getevents io_getevents seems wrong, you are passing the wrong timespec and aio_context_t here. > +#define compat_sys_lookup_dcookie sys_lookup_dcookie > +#define compat_sys_epoll_pwait sys_epoll_pwait epoll_pwait takes sigset_t, which I'd assume is different between ilp32 and lp64, so this is probably wrong too, at least on big-endian. > +#define compat_sys_fcntl64 compat_sys_fcntl This uses compat_off_t, not compat_loff_t, and needs to be changed. > +#define compat_sys_signalfd4 sys_signalfd4 > +#define compat_sys_rt_sigsuspend sys_rt_sigsuspend > +#define compat_sys_rt_sigprocmask sys_rt_sigprocmask > +#define compat_sys_rt_sigpending sys_rt_sigpending sigset_t again, all four of these. > +#define compat_sys_rt_sigqueueinfo sys_rt_sigqueueinfo this looks ok though, as you have the 64-bit siginfo > +#define compat_sys_semtimedop sys_semtimedop timespec again > +#define compat_sys_rt_tgsigqueueinfo sys_rt_tgsigqueueinfo > + > +#define compat_sys_timer_create sys_timer_create > +#define compat_sys_timer_gettime sys_timer_gettime > +#define compat_sys_timer_settime sys_timer_settime timespec again for gettime/settime. create seems fine if you require the use of the 64-bit sigevent (why?) > +#define compat_sys_rt_sigtimedwait sys_rt_sigtimedwait This one probably needs a custom wrapper as you have the 64-bit siginfo, but the 32-bit sigset and timespec. > +#define compat_sys_mq_open sys_mq_open > +#define compat_sys_mq_timedsend sys_mq_timedsend > +#define compat_sys_mq_timedreceive sys_mq_timedreceive > +#define compat_sys_mq_getsetattr sys_mq_getsetattr > +#define compat_sys_mq_open sys_mq_open You have compat_sys_mq_open twice, and they all look wrong because you get the wrong struct mq_attr. > +#define compat_sys_open_by_handle_at sys_open_by_handle_at The only difference here is the forced O_LARGEFILE, but that is set by glibc anyway, right? > +#define compat_sys_clock_adjtime sys_clock_adjtime wrong timex structure > +#define compat_sys_openat sys_openat same as open_by_handle_at > +#define compat_sys_getdents64 sys_getdents64 glibc uses linux_dirent64 for 32-bit architectures, so this looks wrong > +#define compat_sys_waitid sys_waitid This will probably need a separate wrapper to convert rusage but not siginfo > +#define compat_sys_timer_settime sys_timer_settime > +#define compat_sys_sched_rr_get_interval sys_sched_rr_get_interval timespec again > +#define compat_sys_execveat sys_execveat This probably gives you the wrong struct user_arg_ptr > +#define compat_sys_mq_notify sys_mq_notify ok. > +#define compat_sys_clock_nanosleep sys_clock_nanosleep > +#define compat_sys_clock_getres sys_clock_getres timespec > +#define sys_lseek sys_llseek This seems pointless, as there is no sys_lseek > +asmlinkage long compat_sys_mmap2_wrapper(void); > +#define sys_mmap2 compat_sys_mmap2_wrapper > + > +asmlinkage long compat_sys_fstatfs64_wrapper(void); > +#define compat_sys_fstatfs64 compat_sys_fstatfs64_wrapper > +asmlinkage long compat_sys_statfs64_wrapper(void); > +#define compat_sys_statfs64 compat_sys_statfs64_wrapper What are the wrappers for again? Maybe add a comment here. > +#define compat_sys_preadv compat_sys_preadv64 > +#define compat_sys_pwritev compat_sys_pwritev64 wrong iovec. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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