From: Vineet Gupta via Libc-alpha <libc-alpha@xxxxxxxxxxxxxx>
An older asm-generic syscall ABI may have kernel provide 32-bit
time syscalls, so undef them to not mix 32/64 in 64-bit time regime.
Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>
---
Changes since v2
- Made x32 safe
Changes since v1
- don't redirect these to 64-bit variants
---
sysdeps/unix/sysv/linux/generic/sysdep.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/sysdeps/unix/sysv/linux/generic/sysdep.h b/sysdeps/unix/sysv/linux/generic/sysdep.h
index 40b4b955ca1b..b83e17e1c9d1 100644
--- a/sysdeps/unix/sysv/linux/generic/sysdep.h
+++ b/sysdeps/unix/sysv/linux/generic/sysdep.h
@@ -17,6 +17,7 @@
<https://www.gnu.org/licenses/>. */
#include <bits/wordsize.h>
+#include <bits/timesize.h>
#include <kernel-features.h>
#include <sysdeps/unix/sysdep.h>
#include <sysdeps/unix/sysv/linux/sysdep.h>
@@ -25,3 +26,26 @@
#ifdef __NR_llseek
# define __NR__llseek __NR_llseek
#endif
+
+#if (__TIMESIZE == 64 && __WORDSIZE == 32 \
+ && (!defined __SYSCALL_WORDSIZE || __SYSCALL_WORDSIZE == 32))
+
+/* Don't provide 32-bit time syscalls even if the kernel ABI provides
+ them (Older variants of asm-generic ABIs e.g. ARC). */
+
+# undef __NR_futex
+# undef __NR_rt_sigtimedwait
+# undef __NR_ppoll
+# undef __NR_utimensat
+# undef __NR_pselect6
+# undef __NR_recvmmsg
+# undef __NR_semtimedop
+# undef __NR_mq_timedreceive
+# undef __NR_mq_timedsend
+# undef __NR_clock_getres
+# undef __NR_timerfd_settime
+# undef __NR_timerfd_gettime
+# undef __NR_sched_rr_get_interval
+# undef __NR_clock_adjtime
+
+#endif
--
2.20.1
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