void *
getcpu_ifunc (void)
{
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
return _dl_vdso_vsym ("__vdso_getcpu", &linux26);
}
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);
__vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615);
__vdso_clock_gettime = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2615);
__vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres", &linux2615);
__vdso_get_tbfreq = _dl_vdso_vsym ("__kernel_get_tbfreq", &linux2615);
__vdso_getcpu = _dl_vdso_vsym ("__kernel_getcpu", &linux2615);
__vdso_time = _dl_vdso_vsym ("__kernel_time", &linux2615);
/* PPC64 uses only one signal trampoline symbol, while PPC32 will use
two depending if SA_SIGINFO is used (__kernel_sigtramp_rt32) or not
(__kernel_sigtramp32). */
#if defined(__PPC64__) || defined(__powerpc64__)
__vdso_sigtramp_rt64 = _dl_vdso_vsym ("__kernel_sigtramp_rt64", &linux2615);
#else
__vdso_sigtramp32 = _dl_vdso_vsym ("__kernel_sigtramp32", &linux2615);
__vdso_sigtramp_rt32 = _dl_vdso_vsym ("__kernel_sigtramp_rt32", &linux2615);
#endif
}
void *
time_ifunc (void)
{
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
/* If the vDSO is not available we fall back on the old vsyscall. */
return _dl_vdso_vsym ("time", &linux26) ?: (void *) VSYSCALL_ADDR_vtime;
}
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux2639, "LINUX_2.6.39", 123718537);
__vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2639);
__vdso_clock_gettime = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2639);
__vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres", &linux2639);
}
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
void *p = _dl_vdso_vsym ("__vdso_clock_gettime", &linux26);
PTR_MANGLE (p);
__vdso_clock_gettime = p;
}
void *
time_ifunc (void)
{
PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);
/* If the vDSO is not available we fall back to the syscall. */
void *vdso_time = _dl_vdso_vsym ("__kernel_time", &linux2615);
return (vdso_time ? VDSO_IFUNC_RET (vdso_time)
: (void*)time_syscall);
}
void *
gettimeofday_ifunc (void)
{
PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);
/* If the vDSO is not available we fall back syscall. */
void *vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615);
return (vdso_gettimeofday ? VDSO_IFUNC_RET (vdso_gettimeofday)
: (void*)__gettimeofday_syscall);
}
static inline void
_libc_vdso_platform_setup (void)
{
#ifdef __LP64__
PREPARE_VERSION (linux_version, "LINUX_2.6.39", 123718537);
#else
PREPARE_VERSION (linux_version, "LINUX_4.9", 61765625);
#endif
void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux_version);
PTR_MANGLE (p);
VDSO_SYMBOL(gettimeofday) = p;
p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux_version);
PTR_MANGLE (p);
VDSO_SYMBOL(clock_gettime) = p;
p = _dl_vdso_vsym ("__kernel_clock_getres", &linux_version);
PTR_MANGLE (p);
VDSO_SYMBOL(clock_getres) = p;
}
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);
__vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615);
__vdso_clock_gettime = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2615);
__vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres", &linux2615);
__vdso_get_tbfreq = _dl_vdso_vsym ("__kernel_vdso_get_tbfreq", &linux2615);
__vdso_getcpu = _dl_vdso_vsym ("__kernel_getcpu", &linux2615);
}
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
void *p = _dl_vdso_vsym ("gettimeofday", &linux26);
/* If the vDSO is not available we fall back on the old vsyscall. */
#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000ul
if (p == NULL)
p = (void *) VSYSCALL_ADDR_vgettimeofday;
PTR_MANGLE (p);
__vdso_gettimeofday = p;
p = _dl_vdso_vsym ("clock_gettime", &linux26);
PTR_MANGLE (p);
__GI___vdso_clock_gettime = p;
}
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux2639, "LINUX_2.6.39", 123718537);
void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2639);
PTR_MANGLE (p);
VDSO_SYMBOL(gettimeofday) = p;
p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2639);
PTR_MANGLE (p);
VDSO_SYMBOL(clock_gettime) = p;
p = _dl_vdso_vsym ("__kernel_clock_getres", &linux2639);
PTR_MANGLE (p);
VDSO_SYMBOL(clock_getres) = p;
}
static inline void
_libc_vdso_platform_setup (void)
{
void *p;
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
/* It may happen that rtld didn't initialize the vDSO, so fallback
to the syscall implementations if _dl_vdso_vsym returns NULL.
This may happen when a static executable dlopen's a dynamic library.
This really is nothing more than a workaround for rtld/csu
deficiency. Ideally, init code would setup the vDSO for static
binaries too. */
p = _dl_vdso_vsym ("__kernel_read_tp", &linux26);
if (p != NULL)
{
__vdso_read_tp = p;
__rtld___vdso_read_tp = p;
}
else
assert (__vdso_read_tp == (void *) __vdso_read_tp_stub);
p = _dl_vdso_vsym ("__kernel_atomic_cmpxchg_32", &linux26);
if (p != NULL)
{
__vdso_atomic_cmpxchg_32 = p;
__rtld___vdso_atomic_cmpxchg_32 = p;
}
else
assert (__vdso_atomic_cmpxchg_32
== (void *) __vdso_atomic_cmpxchg_32_stub);
p = _dl_vdso_vsym ("__kernel_atomic_barrier", &linux26);
if (p != NULL)
{
__vdso_atomic_barrier = p;
__rtld___vdso_atomic_barrier = p;
}
else
assert (__vdso_atomic_barrier == (void *) __vdso_atomic_barrier_stub);
}
static inline void
_libc_vdso_platform_setup (void)
{
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
__vdso_gettimeofday = _dl_vdso_vsym ("__vdso_gettimeofday", &linux26);
}