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- Log ----------------------------------------------------------------- commit 27ead8e5c8382b60b660980b3225b4341b617e89 Author: Vineet Gupta Vineet.Gupta1@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@synopsys.com

commit 46b205c0a8bf1f6d04458bd1e91f666d7916b205 Author: Vineet Gupta Vineet.Gupta1@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@synopsys.com

commit d7cacc8ff10bb4d17d50b0ba8a08a6a37fc75bcc Author: Vineet Gupta Vineet.Gupta1@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@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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