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| author | dougb <dougb@FreeBSD.org> | 2007-12-03 08:26:34 +0000 |
|---|---|---|
| committer | dougb <dougb@FreeBSD.org> | 2007-12-03 08:26:34 +0000 |
| commit | 0f328cea2580ffb8f9e363be671a517787111472 (patch) | |
| tree | 3594d403c93f290afec0014b7b4b2f6c9b7aef4a /contrib/bind9 | |
| parent | a826585f4002eb7910d23850dae089865d5c9c52 (diff) | |
| download | FreeBSD-src-0f328cea2580ffb8f9e363be671a517787111472.zip FreeBSD-src-0f328cea2580ffb8f9e363be671a517787111472.tar.gz | |
Update this file so that BIND on ARM can actually work. I quote:
The problem was, isc_atomic_cmpxchg() is almost like our
atomic_cmpset_32(), except it expects the old value to be
returned, whereas our atomic_cmpset_32 returns 1 on success,
or 0 on failure. So I re-implemented something suitable.
Submitted by: cognet
Reviewed by: bsdimp
Diffstat (limited to 'contrib/bind9')
| -rw-r--r-- | contrib/bind9/lib/isc/arm/include/isc/atomic.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/contrib/bind9/lib/isc/arm/include/isc/atomic.h b/contrib/bind9/lib/isc/arm/include/isc/atomic.h index 272edd8..4c519ee 100644 --- a/contrib/bind9/lib/isc/arm/include/isc/atomic.h +++ b/contrib/bind9/lib/isc/arm/include/isc/atomic.h @@ -49,7 +49,29 @@ isc_atomic_store(isc_int32_t *p, isc_int32_t val) static inline isc_int32_t isc_atomic_cmpxchg(isc_int32_t *p, isc_int32_t cmpval, isc_int32_t val) { - return atomic_cmpset_int(p, cmpval, val); + register int done, ras_start; + + __asm __volatile("1:\n" + "adr %1, 1b\n" + "mov %0, #0xe0000004\n" + "str %1, [%0]\n" + "mov %0, #0xe0000008\n" + "adr %1, 2f\n" + "str %1, [%0]\n" + "ldr %1, [%2]\n" + "cmp %1, %3\n" + "streq %4, [%2]\n" + "2:\n" + "mov %3, #0\n" + "mov %0, #0xe0000004\n" + "str %3, [%0]\n" + "mov %3, #0xffffffff\n" + "mov %0, #0xe0000008\n" + "str %3, [%0]\n" + : "=r" (ras_start), "=r" (done) + ,"+r" (p), "+r" (cmpval), "+r" (val) : : "memory"); + return (done); + } #else /* !FreeBSD */ |
