linux: Use long time_t __getitimer/__setitimer

The Linux kernel expects itimerval to use a 32-bit time_t, even on archs
with a 64-bit time_t (like RV32). To address this let's convert
itimerval to/from 32-bit and 64-bit to ensure the kernel always gets
a 32-bit time_t.

While we are converting these functions let's also convert them to be
the y2038 safe versions. This means there is a *64 function that is
called by a backwards compatible wrapper.

Tested-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/time.h b/include/time.h
index 2523e0ff0d..4522fe9c4f 100644
--- a/include/time.h
+++ b/include/time.h
@@ -6,6 +6,7 @@
 # include <bits/types/locale_t.h>
 # include <stdbool.h>
 # include <time/mktime-internal.h>
+# include <sys/time.h>
 # include <endian.h>
 # include <time-clockid.h>
 # include <sys/time.h>
@@ -128,6 +129,20 @@ struct __itimerval64
 #endif
 
 #if __TIMESIZE == 64
+# define __getitimer64 __getitimer
+# define __setitimer64 __setitimer
+#else
+extern int __getitimer64 (enum __itimer_which __which,
+                          struct __itimerval64 *__value);
+
+libc_hidden_proto (__getitimer64)
+extern int __setitimer64 (enum __itimer_which __which,
+                          const struct __itimerval64 *__restrict __new,
+                          struct __itimerval64 *__restrict __old);
+libc_hidden_proto (__setitimer64)
+#endif
+
+#if __TIMESIZE == 64
 # define __ctime64 ctime
 #else
 extern char *__ctime64 (const __time64_t *__timer) __THROW;