diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | NEWS | 25 | ||||
| -rw-r--r-- | sysdeps/i386/i486/bits/atomic.h | 7 | ||||
| -rw-r--r-- | sysdeps/x86_64/bits/atomic.h | 7 |
4 files changed, 35 insertions, 12 deletions
diff --git a/ChangeLog b/ChangeLog index d2132be616..6c18edd5c5 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,11 @@ +2015-06-23 Torvald Riegel <triegel@redhat.com> + + [BZ #17403] + * sysdeps/x86_64/bits/atomic.h: (atomic_full_barrier, + atomic_read_barrier, atomic_write_barrier): Define. + * sysdeps/i386/i486/bits/atomic.h (atomic_full_barrier, + atomic_read_barrier, atomic_write_barrier): Define. + 2015-06-23 Joseph Myers <joseph@codesourcery.com> * math/Makefile [$(PERL) != no] diff --git a/NEWS b/NEWS index fcffaead68..a46efd69bc 100644 --- a/NEWS +++ b/NEWS @@ -12,18 +12,19 @@ Version 2.22 438, 4719, 6792, 13028, 13064, 14094, 14841, 14906, 14958, 15319, 15467, 15790, 15969, 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293, 17322, - 17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621, 17628, 17631, - 17692, 17711, 17715, 17776, 17779, 17792, 17836, 17912, 17916, 17930, - 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17977, 17978, 17987, - 17991, 17996, 17998, 17999, 18007, 18019, 18020, 18029, 18030, 18032, - 18034, 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18049, 18068, - 18080, 18093, 18100, 18104, 18110, 18111, 18116, 18125, 18128, 18138, - 18185, 18196, 18197, 18206, 18210, 18211, 18217, 18219, 18220, 18221, - 18234, 18244, 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18397, - 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18468, 18469, 18470, - 18479, 18483, 18495, 18496, 18497, 18498, 18507, 18512, 18513, 18519, - 18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536, - 18539, 18540, 18542, 18544, 18545, 18546, 18547, 18553, 18558, 18569. + 17403, 17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621, 17628, + 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17836, 17912, 17916, + 17930, 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17977, 17978, + 17987, 17991, 17996, 17998, 17999, 18007, 18019, 18020, 18029, 18030, + 18032, 18034, 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18049, + 18068, 18080, 18093, 18100, 18104, 18110, 18111, 18116, 18125, 18128, + 18138, 18185, 18196, 18197, 18206, 18210, 18211, 18217, 18219, 18220, + 18221, 18234, 18244, 18247, 18287, 18319, 18324, 18333, 18346, 18371, + 18397, 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18468, 18469, + 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18507, 18512, 18513, + 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, + 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547, 18553, 18558, + 18569. * Cache information can be queried via sysconf() function on s390 e.g. with _SC_LEVEL1_ICACHE_SIZE as argument. diff --git a/sysdeps/i386/i486/bits/atomic.h b/sysdeps/i386/i486/bits/atomic.h index 01c2b942b3..59165bec94 100644 --- a/sysdeps/i386/i486/bits/atomic.h +++ b/sysdeps/i386/i486/bits/atomic.h @@ -535,3 +535,10 @@ typedef uintmax_t uatomic_max_t; #define atomic_or(mem, mask) __arch_or_body (LOCK_PREFIX, mem, mask) #define catomic_or(mem, mask) __arch_or_body (__arch_cprefix, mem, mask) + +/* We don't use mfence because it is supposedly slower due to having to + provide stronger guarantees (e.g., regarding self-modifying code). */ +#define atomic_full_barrier() \ + __asm __volatile (LOCK_PREFIX "orl $0, (%%esp)" ::: "memory") +#define atomic_read_barrier() __asm ("" ::: "memory") +#define atomic_write_barrier() __asm ("" ::: "memory") diff --git a/sysdeps/x86_64/bits/atomic.h b/sysdeps/x86_64/bits/atomic.h index 5d08146cd7..203d92c20d 100644 --- a/sysdeps/x86_64/bits/atomic.h +++ b/sysdeps/x86_64/bits/atomic.h @@ -472,3 +472,10 @@ typedef uintmax_t uatomic_max_t; #define atomic_or(mem, mask) __arch_or_body (LOCK_PREFIX, mem, mask) #define catomic_or(mem, mask) __arch_or_body (__arch_cprefix, mem, mask) + +/* We don't use mfence because it is supposedly slower due to having to + provide stronger guarantees (e.g., regarding self-modifying code). */ +#define atomic_full_barrier() \ + __asm __volatile (LOCK_PREFIX "orl $0, (%%rsp)" ::: "memory") +#define atomic_read_barrier() __asm ("" ::: "memory") +#define atomic_write_barrier() __asm ("" ::: "memory") |