add time64 symbol name redirects to public headers, under arch control

a _REDIR_TIME64 macro is introduced, which the arch's alltypes.h is
expected to define, to control redirection of symbol names for
interfaces that involve time_t and derived types. this ensures that
object files will only be linked to libc interfaces matching the ABI
whose headers they were compiled against.

along with time32 compat shims, which will be introduced separately,
the redirection also makes it possible for a single libc (static or
shared) to be used with object files produced with either the old
(32-bit time_t) headers or the new ones after 64-bit time_t switchover
takes place. mixing of such object files (or shared libraries) in the
same program will also be possible, but must be done with care; ABI
between libc and a consumer of the libc interfaces is guaranteed to
match by the the symbol name redirection, but pairwise ABI between
consumers of libc that define interfaces between each other in terms
of time_t is not guaranteed to match.

this change adds a dependency on an additional "GNU C" feature to the
public headers for existing 32-bit archs, which is generally
undesirable; however, the feature is one which glibc has depended on
for a long time, and thus which any viable alternative compiler is
going to need to provide. 64-bit archs are not affected, nor will
future 32-bit archs be, regardless of whether they are "new" on the
kernel side (e.g. riscv32) or just newly-added (e.g. a new sparc or
xtensa port). the same applies to newly-added ABIs for existing
machine-level archs.

diff --git a/include/aio.h b/include/aio.h
index 19bc28a9b19e0d5c3aa90fcf1aa8a36745dcf259..453c41b7489f3d2f27a545db8a9ab072e9ea75d0 100644 (file)
--- a/include/aio.h
+++ b/include/aio.h
@@ -62,6 +62,10 @@ int lio_listio(int, struct aiocb *__restrict const *__restrict, int, struct sige
 #define off64_t off_t
 #endif
 
+#if _REDIR_TIME64
+__REDIR(aio_suspend, __aio_suspend_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/features.h b/include/features.h
index f4d651efcd0a39b021fec66cdf1469b941654a5a..85cfb72a0d427de18f5732c7fd320310cbe8843d 100644 (file)
--- a/include/features.h
+++ b/include/features.h
@@ -35,4 +35,6 @@
 #define _Noreturn
 #endif
 
+#define __REDIR(x,y) __typeof__(x) x __asm__(#y)
+
 #endif

diff --git a/include/mqueue.h b/include/mqueue.h
index f5cbe79656b3ab2fdcfc18c91229649e77a2c82e..0c807ea0cbb26e6a5d46df5cdb0be6bb8c84ba42 100644 (file)
--- a/include/mqueue.h
+++ b/include/mqueue.h
@@ -30,6 +30,11 @@ ssize_t mq_timedreceive(mqd_t, char *__restrict, size_t, unsigned *__restrict, c
 int mq_timedsend(mqd_t, const char *, size_t, unsigned, const struct timespec *);
 int mq_unlink(const char *);
 
+#if _REDIR_TIME64
+__REDIR(mq_timedreceive, __mq_timedreceive_time64);
+__REDIR(mq_timedsend, __mq_timedsend_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/poll.h b/include/poll.h
index daccc760bb26a821ce00424cb1d61f8764cc83c3..472e4b8470bae3904100963200ac3dcfb7e34879 100644 (file)
--- a/include/poll.h
+++ b/include/poll.h
@@ -44,6 +44,12 @@ int poll (struct pollfd *, nfds_t, int);
 int ppoll(struct pollfd *, nfds_t, const struct timespec *, const sigset_t *);
 #endif
 
+#if _REDIR_TIME64
+#ifdef _GNU_SOURCE
+__REDIR(ppoll, __ppoll_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/pthread.h b/include/pthread.h
index e238321b9caf14af72d7f216a1e7c82bbc830471..984db68064185aafc2620843fbea21aea2e36b2f 100644 (file)
--- a/include/pthread.h
+++ b/include/pthread.h
@@ -224,6 +224,16 @@ int pthread_tryjoin_np(pthread_t, void **);
 int pthread_timedjoin_np(pthread_t, void **, const struct timespec *);
 #endif
 
+#if _REDIR_TIME64
+__REDIR(pthread_mutex_timedlock, __pthread_mutex_timedlock_time64);
+__REDIR(pthread_cond_timedwait, __pthread_cond_timedwait_time64);
+__REDIR(pthread_rwlock_timedrdlock, __pthread_rwlock_timedrdlock_time64);
+__REDIR(pthread_rwlock_timedwrlock, __pthread_rwlock_timedwrlock_time64);
+#ifdef _GNU_SOURCE
+__REDIR(pthread_timedjoin_np, __pthread_timedjoin_np_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sched.h b/include/sched.h
index 7e470d3a133ffdb19e0f05cb48627acbda345f08..c3a8d49a1aaa7ea54230c9e178f7a526e279fd54 100644 (file)
--- a/include/sched.h
+++ b/include/sched.h
@@ -133,6 +133,10 @@ __CPU_op_func_S(XOR, ^)
 
 #endif
 
+#if _REDIR_TIME64
+__REDIR(sched_rr_get_interval, __sched_rr_get_interval_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/semaphore.h b/include/semaphore.h
index 277c47d6f7425b9a8dc5578b3850c5b7c4847a9f..3690f49609d16026db882032ec7d7e2363e5eaa0 100644 (file)
--- a/include/semaphore.h
+++ b/include/semaphore.h
@@ -29,6 +29,10 @@ int    sem_trywait(sem_t *);
 int    sem_unlink(const char *);
 int    sem_wait(sem_t *);
 
+#if _REDIR_TIME64
+__REDIR(sem_timedwait, __sem_timedwait_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/signal.h b/include/signal.h
index 5c48cb838fab75faea60d2433d47be2088d786d9..fbdf667b2f202ab2f1375952ce9d4cf636ef1ce0 100644 (file)
--- a/include/signal.h
+++ b/include/signal.h
@@ -271,6 +271,14 @@ typedef int sig_atomic_t;
 void (*signal(int, void (*)(int)))(int);
 int raise(int);
 
+#if _REDIR_TIME64
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+__REDIR(sigtimedwait, __sigtimedwait_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/resource.h b/include/sys/resource.h
index 70d793d563f588469f74e670ac6a993aa528a407..e0c86ae33c3e183df9b32387bd8a4bc4a897911c 100644 (file)
--- a/include/sys/resource.h
+++ b/include/sys/resource.h
@@ -104,6 +104,10 @@ int prlimit(pid_t, int, const struct rlimit *, struct rlimit *);
 #define rlim64_t rlim_t
 #endif
 
+#if _REDIR_TIME64
+__REDIR(getrusage, __getrusage_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/select.h b/include/sys/select.h
index d34cbf10d9cc9cbdee6534611726fb93d002a40d..b3bab1d57b492700b27ed27eba96407baa1bdf74 100644 (file)
--- a/include/sys/select.h
+++ b/include/sys/select.h
@@ -35,6 +35,11 @@ int pselect (int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict, co
 #define NFDBITS (8*(int)sizeof(long))
 #endif
 
+#if _REDIR_TIME64
+__REDIR(select, __select_time64);
+__REDIR(pselect, __pselect_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/sem.h b/include/sys/sem.h
index e6161e51d15b217a9edf379a92259d9c3767f4a5..a747784ede9e0d0a04d96b80c29bc8f847e3b3c7 100644 (file)
--- a/include/sys/sem.h
+++ b/include/sys/sem.h
@@ -60,6 +60,12 @@ int semop(int, struct sembuf *, size_t);
 int semtimedop(int, struct sembuf *, size_t, const struct timespec *);
 #endif
 
+#if _REDIR_TIME64
+#ifdef _GNU_SOURCE
+__REDIR(semtimedop, __semtimedop_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/socket.h b/include/sys/socket.h
index 8692efa7ad6474a7ce6dc1dc850f2e1097a2300d..318a98ef66ffd2dde881ab564c98ff7d5144b142 100644 (file)
--- a/include/sys/socket.h
+++ b/include/sys/socket.h
@@ -350,6 +350,12 @@ int setsockopt (int, int, int, const void *, socklen_t);
 
 int sockatmark (int);
 
+#if _REDIR_TIME64
+#ifdef _GNU_SOURCE
+__REDIR(recvmmsg, __recvmmsg_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/stat.h b/include/sys/stat.h
index 9d096624bcfa44594c71d47591944adae0d9e742..10d446c463eca4862b6bb8d394d52c13d27c4cf9 100644 (file)
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -110,6 +110,15 @@ int lchmod(const char *, mode_t);
 #define off64_t off_t
 #endif
 
+#if _REDIR_TIME64
+__REDIR(stat, __stat_time64);
+__REDIR(fstat, __fstat_time64);
+__REDIR(lstat, __lstat_time64);
+__REDIR(fstatat, __fstatat_time64);
+__REDIR(futimens, __futimens_time64);
+__REDIR(utimensat, __utimensat_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/time.h b/include/sys/time.h
index c5cab814c0d112d493d75d1a35c98bb338195687..cdc67ef650fe3cd758b579052df907f8b56baab6 100644 (file)
--- a/include/sys/time.h
+++ b/include/sys/time.h
@@ -56,6 +56,20 @@ int adjtime (const struct timeval *, struct timeval *);
        (void)0 )
 #endif
 
+#if _REDIR_TIME64
+__REDIR(gettimeofday, __gettimeofday_time64);
+__REDIR(getitimer, __getitimer_time64);
+__REDIR(setitimer, __setitimer_time64);
+__REDIR(utimes, __utimes_time64);
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+__REDIR(futimes, __futimes_time64);
+__REDIR(futimesat, __futimesat_time64);
+__REDIR(lutimes, __lutimes_time64);
+__REDIR(settimeofday, __settimeofday_time64);
+__REDIR(adjtime, __adjtime64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/timeb.h b/include/sys/timeb.h
index 108c1f5ccbbd45d484ac79062cbc5104c01b02cc..628239b7ed9342ad8f19a655c290b4be2c6ba213 100644 (file)
--- a/include/sys/timeb.h
+++ b/include/sys/timeb.h
@@ -4,6 +4,8 @@
 extern "C" {
 #endif
 
+#include <features.h>
+
 #define __NEED_time_t
 
 #include <bits/alltypes.h>
@@ -16,6 +18,10 @@ struct timeb {
 
 int ftime(struct timeb *);
 
+#if _REDIR_TIME64
+__REDIR(ftime, __ftime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/timerfd.h b/include/sys/timerfd.h
index 2794d36a6c2b2b37e8f7f2d4f28c02e85223de06..1b832cdd8f8faed5423cdc7d33060ed1f1cd73e3 100644 (file)
--- a/include/sys/timerfd.h
+++ b/include/sys/timerfd.h
@@ -20,6 +20,11 @@ int timerfd_create(int, int);
 int timerfd_settime(int, int, const struct itimerspec *, struct itimerspec *);
 int timerfd_gettime(int, struct itimerspec *);
 
+#if _REDIR_TIME64
+__REDIR(timerfd_settime, __timerfd_settime64);
+__REDIR(timerfd_gettime, __timerfd_gettime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/timex.h b/include/sys/timex.h
index 2e688880a8b2d71e905091161efa63a32601d53e..8b417e1be258c3a342646c3ba4528c1b6f8a7e10 100644 (file)
--- a/include/sys/timex.h
+++ b/include/sys/timex.h
@@ -91,6 +91,11 @@ struct timex {
 int adjtimex(struct timex *);
 int clock_adjtime(clockid_t, struct timex *);
 
+#if _REDIR_TIME64
+__REDIR(adjtimex, __adjtimex_time64);
+__REDIR(clock_adjtime, __clock_adjtime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/sys/wait.h b/include/sys/wait.h
index 50c5c709a6beaa5575f9ab56e24bd115abf77c5d..d9adbdec827f17844839f3e0a3eab19136926722 100644 (file)
--- a/include/sys/wait.h
+++ b/include/sys/wait.h
@@ -53,6 +53,13 @@ pid_t wait4 (pid_t, int *, int, struct rusage *);
 #define WIFSIGNALED(s) (((s)&0xffff)-1U < 0xffu)
 #define WIFCONTINUED(s) ((s) == 0xffff)
 
+#if _REDIR_TIME64
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+__REDIR(wait3, __wait3_time64);
+__REDIR(wait4, __wait4_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/threads.h b/include/threads.h
index 8122b3b1df5e5a931b98eb688d227800934a126b..52ec3100eb9e2ebf3523123ba51021582361b855 100644 (file)
--- a/include/threads.h
+++ b/include/threads.h
@@ -80,6 +80,12 @@ void tss_delete(tss_t);
 int tss_set(tss_t, void *);
 void *tss_get(tss_t);
 
+#if _REDIR_TIME64
+__REDIR(thrd_sleep, __thrd_sleep_time64);
+__REDIR(mtx_timedlock, __mtx_timedlock_time64);
+__REDIR(cnd_timedwait, __cnd_timedwait_time64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/time.h b/include/time.h
index 672b3fc3ee23d144ef3f605e7c20533db97cd1a8..5494df183673388e64e8305182131a58022530b5 100644 (file)
--- a/include/time.h
+++ b/include/time.h
@@ -130,6 +130,34 @@ int stime(const time_t *);
 time_t timegm(struct tm *);
 #endif
 
+#if _REDIR_TIME64
+__REDIR(time, __time64);
+__REDIR(difftime, __difftime64);
+__REDIR(mktime, __mktime64);
+__REDIR(gmtime, __gmtime64);
+__REDIR(localtime, __localtime64);
+__REDIR(ctime, __ctime64);
+__REDIR(timespec_get, __timespec_get_time64);
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+__REDIR(gmtime_r, __gmtime64_r);
+__REDIR(localtime_r, __localtime64_r);
+__REDIR(ctime_r, __ctime64_r);
+__REDIR(nanosleep, __nanosleep_time64);
+__REDIR(clock_getres, __clock_getres_time64);
+__REDIR(clock_gettime, __clock_gettime64);
+__REDIR(clock_settime, __clock_settime64);
+__REDIR(clock_nanosleep, __clock_nanosleep_time64);
+__REDIR(timer_settime, __timer_settime64);
+__REDIR(timer_gettime, __timer_gettime64);
+#endif
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+__REDIR(stime, __stime64);
+__REDIR(timegm, __timegm_time64);
+#endif
+#endif
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/include/utime.h b/include/utime.h
index dd5ff927c25d1ec82475c569a0d4c09f3c1fce29..5755bd53ee866ebf7a1b73768bad7837a2de5f70 100644 (file)
--- a/include/utime.h
+++ b/include/utime.h
@@ -5,6 +5,8 @@
 extern "C" {
 #endif
 
+#include <features.h>
+
 #define __NEED_time_t
 
 #include <bits/alltypes.h>
@@ -16,6 +18,10 @@ struct utimbuf {
 
 int utime (const char *, const struct utimbuf *);
 
+#if _REDIR_TIME64
+__REDIR(utime, __utime64);
+#endif
+
 #ifdef __cplusplus
 }
 #endif