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[[PATCH,RFC,2] 14/63] Y2038: arm: implement clock_gettime64 as a VDSO symbol

Message ID 20180418201819.15952-15-albert.aribaud@3adev.fr
State New
Headers show

Commit Message

Albert ARIBAUD April 18, 2018, 8:17 p.m. UTC
---
 sysdeps/unix/sysv/linux/arm/init-first.c | 15 +++++++++++++++
 sysdeps/unix/sysv/linux/arm/libc-vdso.h  |  1 +
 2 files changed, 16 insertions(+)
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Patch

diff --git a/sysdeps/unix/sysv/linux/arm/init-first.c b/sysdeps/unix/sysv/linux/arm/init-first.c
index f4293b1cf8..76528bf194 100644
--- a/sysdeps/unix/sysv/linux/arm/init-first.c
+++ b/sysdeps/unix/sysv/linux/arm/init-first.c
@@ -23,6 +23,14 @@ 
 
 int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *) attribute_hidden;
 int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
+long (*VDSO_SYMBOL(clock_gettime64)) (clockid_t, struct __timespec64 *);
+
+int __y2038_linux_support;
+
+int __y2038_kernel_support (void)
+{
+  return __y2038_linux_support;
+}
 
 static inline void
 _libc_vdso_platform_setup (void)
@@ -36,6 +44,13 @@  _libc_vdso_platform_setup (void)
   p = _dl_vdso_vsym ("__vdso_clock_gettime", &linux26);
   PTR_MANGLE (p);
   VDSO_SYMBOL (clock_gettime) = p;
+
+  /* (aaribaud) TODO: map to version where clock_gettime64 officially appears */
+  p = _dl_vdso_vsym ("__vdso_clock_gettime64", NULL);
+  PTR_MANGLE (p);
+  VDSO_SYMBOL (clock_gettime64) = p;
+
+  __y2038_linux_support = (p != NULL) ? 1 : 0;
 }
 
 # define VDSO_SETUP _libc_vdso_platform_setup
diff --git a/sysdeps/unix/sysv/linux/arm/libc-vdso.h b/sysdeps/unix/sysv/linux/arm/libc-vdso.h
index 52dd355818..dc616244c6 100644
--- a/sysdeps/unix/sysv/linux/arm/libc-vdso.h
+++ b/sysdeps/unix/sysv/linux/arm/libc-vdso.h
@@ -27,6 +27,7 @@ 
 extern int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
    attribute_hidden;
 extern int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
+extern long (*VDSO_SYMBOL(clock_gettime64)) (clockid_t, struct __timespec64 *);
 
 #endif