linux 4.x doesn't support time64 syscalls вс, 22 дек. 2024 г., 13:00 Nadav Tasher <tasherna...@gmail.com>:
> Interesting - I have been able to reproduce the bug when compiling like > so: > make CROSS_COMPILE=mips-linux-gnu- TARGET_ARCH=mips > KERNEL_HEADERS=~/linux-headers-4.19.325/include/ -j4 clean > make CROSS_COMPILE=mips-linux-gnu- TARGET_ARCH=mips > KERNEL_HEADERS=~/linux-headers-4.19.325/include/ -j4 > > Note that this also reproduces in the existing toolchain at > https://toolchains.bootlin.com/downloads/releases/toolchains/mips32/tarballs/mips32--uclibc--stable-2024.05-1.tar.xz > (this is actually how I encountered the bug). > > Dmitriy Chestnykh wrote: > > Cannot reproduce it with the latest uclibc. > > Config in attachment > > > > > > сб, 21 дек. 2024 г. в 14:20, Nadav Tasher <tasherna...@gmail.com>: > > > > > Hi Waldemar, > > > > > > The following snippet should do it when compiled statically for MIPS32 > > > and emulated using qemu-user-static: > > > > > > #include <time.h> > > > #include <stddef.h> > > > #include <unistd.h> > > > > > > int main(int argc, char **argv) { > > > > > > time_t start = time(NULL); > > > sleep(2); > > > time_t end = time(NULL); > > > > > > return end != start; > > > } > > > > > > When I strace the resulting binary, I saw: > > > [pid 2271212] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 > > > [pid 2271212] clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=2}, > > > 0x7ffca592a250) = 0 > > > [pid 2271212] brk(0x611d0d49b000) = 0x611d0d49b000 > > > [pid 2271212] exit_group(1) = ? > > > > > > But I expected to see: > > > [pid 2271212] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 > > > [pid 2271212] clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=2, tv_nsec=0}, > > > 0x7ffca592a250) = 0 > > > [pid 2271212] brk(0x611d0d49b000) = 0x611d0d49b000 > > > [pid 2271212] exit_group(1) = ? > > > > > > kind regards > > > Nadav > > > > > > Waldemar Brodkorb wrote, > > > > Hi Nadav, > > > > > > > > do you have some test code showing the issue? > > > > > > > > best regards > > > > Waldemar > > > > > > > > Nadav Tasher wrote, > > > > > > > > > Without this change `timespec` is too large for the > `clock_nanosleep` > > > syscall, > > > > > which translates to sleep(0) on 32bit systems when TIME64 is > enabled > > > (the default). > > > > > > > > > > Tested on MIPS. > > > > > > > > > > Signed-off-by: Nadav Tasher <tasherna...@gmail.com> > > > > > --- > > > > > include/time.h | 2 +- > > > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > > > > > diff --git a/include/time.h b/include/time.h > > > > > index 1a1408990..25dfb9e2e 100644 > > > > > --- a/include/time.h > > > > > +++ b/include/time.h > > > > > @@ -118,7 +118,7 @@ typedef __timer_t timer_t; > > > > > has nanoseconds instead of microseconds. */ > > > > > struct timespec > > > > > { > > > > > - __time_t tv_sec; /* Seconds. */ > > > > > + int tv_sec; /* Seconds. */ > > > > > long int tv_nsec; /* Nanoseconds. */ > > > > > }; > > > > > > > > > > -- > > > > > 2.34.1 > > > > > > > > > > _______________________________________________ > > > > > devel mailing list -- devel@uclibc-ng.org > > > > > To unsubscribe send an email to devel-le...@uclibc-ng.org > > > > > > > > _______________________________________________ > > > devel mailing list -- devel@uclibc-ng.org > > > To unsubscribe send an email to devel-le...@uclibc-ng.org > > > > > >
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