22 Oct
2015
22 Oct
'15
1:19 p.m.
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- Log -----------------------------------------------------------------
commit 9860910d1706011a561c9a9075b0ab76af098588
Author: Vineet Gupta <Vineet.Gupta1(a)synopsys.com>
Date: Wed Oct 21 12:42:25 2015 +0530
ARC: With NPTL support, GP is no longer used for PIC
Signed-off-by: Vineet Gupta <vgupta(a)synopsys.com>
commit da25b583ece753e46f6af1342986e189099dc679
Author: Vineet Gupta <Vineet.Gupta1(a)synopsys.com>
Date: Wed Oct 21 12:42:24 2015 +0530
NPTL/ARC: fix __lll_lock_wait_private redefinition for static links
Commit 2d9740a65a "uclibc: nptl: fix __lll_lock_wait_private multiple
definition"
did a sweeping change which did for all in tree arches at that time (ARC
wasn't)
Signed-off-by: Vineet Gupta <vgupta(a)synopsys.com>
commit fef346b2666ed2e7331fe4ca74a7dbaedc380b20
Author: Vineet Gupta <Vineet.Gupta1(a)synopsys.com>
Date: Wed Oct 21 12:42:23 2015 +0530
NPTL/ARCv2: Implement full memory barrier for NPTL
Signed-off-by: Vineet Gupta <vgupta(a)synopsys.com>
-----------------------------------------------------------------------
Summary of changes:
ldso/ldso/arc/dl-sysdep.h | 6 ------
libc/sysdeps/linux/arc/bits/atomic.h | 7 +++++--
libpthread/nptl/sysdeps/unix/sysv/linux/arc/lowlevellock.c | 4 +++-
3 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/ldso/ldso/arc/dl-sysdep.h b/ldso/ldso/arc/dl-sysdep.h
index ca62a2c..b6bda9d 100644
--- a/ldso/ldso/arc/dl-sysdep.h
+++ b/ldso/ldso/arc/dl-sysdep.h
@@ -127,12 +127,6 @@ static __always_inline Elf32_Addr elf_machine_dynamic(void)
__asm__("ld %0,[pcl,_DYNAMIC@gotpc]\n\t" : "=r" (dyn));
return dyn;
-
-/*
- * Another way would have been to simply return GP, which due to some
- * PIC reference would be automatically setup by gcc in caller
- * register Elf32_Addr *got __asm__ ("gp"); return *got;
- */
}
/* Return the run-time load address of the shared object. */
diff --git a/libc/sysdeps/linux/arc/bits/atomic.h b/libc/sysdeps/linux/arc/bits/atomic.h
index d4abf4e..1fdc83f 100644
--- a/libc/sysdeps/linux/arc/bits/atomic.h
+++ b/libc/sysdeps/linux/arc/bits/atomic.h
@@ -24,8 +24,11 @@ typedef uintmax_t uatomic_max_t;
void __arc_link_error (void);
-#define atomic_full_barrier() \
- __asm__ __volatile__("": : :"memory")
+#ifdef __A7__
+#define atomic_full_barrier() __asm__ __volatile__("": : :"memory")
+#else
+#define atomic_full_barrier() __asm__ __volatile__("dmb 3": :
:"memory")
+#endif
/* Atomic compare and exchange. */
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/arc/lowlevellock.c
b/libpthread/nptl/sysdeps/unix/sysv/linux/arc/lowlevellock.c
index 1aa7960..fd39fe9 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/arc/lowlevellock.c
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/arc/lowlevellock.c
@@ -24,8 +24,10 @@
#include <tls.h>
#include <tcb-offsets.h>
-
void
+#ifndef IS_IN_libpthread
+weak_function
+#endif
__lll_lock_wait_private (int *futex)
{
if (*futex == 2)
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