5ac29058f0
For a misaligned address force a panic rather than assuming that reading
from the address 0 will cause one.
Reviewed-on: https://go-review.googlesource.com/69850
From-SVN: r254610
374 lines
8.2 KiB
C
374 lines
8.2 KiB
C
/* atomic.c -- implement atomic routines for Go.
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Copyright 2011 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file. */
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#include <stdint.h>
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#include "runtime.h"
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int32_t SwapInt32 (int32_t *, int32_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.SwapInt32")
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__attribute__ ((no_split_stack));
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int32_t
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SwapInt32 (int32_t *addr, int32_t new)
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{
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return __atomic_exchange_n (addr, new, __ATOMIC_SEQ_CST);
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}
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int64_t SwapInt64 (int64_t *, int64_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.SwapInt64")
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__attribute__ ((no_split_stack));
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int64_t
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SwapInt64 (int64_t *addr, int64_t new)
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{
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if (((uintptr_t) addr & 7) != 0)
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panicmem ();
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return __atomic_exchange_n (addr, new, __ATOMIC_SEQ_CST);
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}
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uint32_t SwapUint32 (uint32_t *, uint32_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.SwapUint32")
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__attribute__ ((no_split_stack));
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uint32_t
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SwapUint32 (uint32_t *addr, uint32_t new)
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{
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return __atomic_exchange_n (addr, new, __ATOMIC_SEQ_CST);
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}
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uint64_t SwapUint64 (uint64_t *, uint64_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.SwapUint64")
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__attribute__ ((no_split_stack));
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uint64_t
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SwapUint64 (uint64_t *addr, uint64_t new)
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{
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if (((uintptr_t) addr & 7) != 0)
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panicmem ();
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return __atomic_exchange_n (addr, new, __ATOMIC_SEQ_CST);
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}
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uintptr_t SwapUintptr (uintptr_t *, uintptr_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.SwapUintptr")
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__attribute__ ((no_split_stack));
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uintptr_t
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SwapUintptr (uintptr_t *addr, uintptr_t new)
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{
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return __atomic_exchange_n (addr, new, __ATOMIC_SEQ_CST);
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}
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void *SwapPointer (void **, void *)
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__asm__ (GOSYM_PREFIX "sync_atomic.SwapPointer")
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__attribute__ ((no_split_stack));
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void *
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SwapPointer (void **addr, void *new)
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{
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return __atomic_exchange_n (addr, new, __ATOMIC_SEQ_CST);
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}
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_Bool CompareAndSwapInt32 (int32_t *, int32_t, int32_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.CompareAndSwapInt32")
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__attribute__ ((no_split_stack));
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_Bool
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CompareAndSwapInt32 (int32_t *val, int32_t old, int32_t new)
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{
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return __sync_bool_compare_and_swap (val, old, new);
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}
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_Bool CompareAndSwapInt64 (int64_t *, int64_t, int64_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.CompareAndSwapInt64")
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__attribute__ ((no_split_stack));
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_Bool
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CompareAndSwapInt64 (int64_t *val, int64_t old, int64_t new)
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{
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if (((uintptr_t) val & 7) != 0)
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val = NULL;
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return __sync_bool_compare_and_swap (val, old, new);
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}
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_Bool CompareAndSwapUint32 (uint32_t *, uint32_t, uint32_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.CompareAndSwapUint32")
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__attribute__ ((no_split_stack));
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_Bool
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CompareAndSwapUint32 (uint32_t *val, uint32_t old, uint32_t new)
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{
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return __sync_bool_compare_and_swap (val, old, new);
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}
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_Bool CompareAndSwapUint64 (uint64_t *, uint64_t, uint64_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.CompareAndSwapUint64")
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__attribute__ ((no_split_stack));
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_Bool
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CompareAndSwapUint64 (uint64_t *val, uint64_t old, uint64_t new)
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{
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if (((uintptr_t) val & 7) != 0)
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val = NULL;
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return __sync_bool_compare_and_swap (val, old, new);
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}
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_Bool CompareAndSwapUintptr (uintptr_t *, uintptr_t, uintptr_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.CompareAndSwapUintptr")
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__attribute__ ((no_split_stack));
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_Bool
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CompareAndSwapUintptr (uintptr_t *val, uintptr_t old, uintptr_t new)
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{
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return __sync_bool_compare_and_swap (val, old, new);
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}
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_Bool CompareAndSwapPointer (void **, void *, void *)
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__asm__ (GOSYM_PREFIX "sync_atomic.CompareAndSwapPointer")
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__attribute__ ((no_split_stack));
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_Bool
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CompareAndSwapPointer (void **val, void *old, void *new)
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{
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return __sync_bool_compare_and_swap (val, old, new);
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}
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int32_t AddInt32 (int32_t *, int32_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.AddInt32")
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__attribute__ ((no_split_stack));
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int32_t
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AddInt32 (int32_t *val, int32_t delta)
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{
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return __sync_add_and_fetch (val, delta);
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}
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uint32_t AddUint32 (uint32_t *, uint32_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.AddUint32")
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__attribute__ ((no_split_stack));
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uint32_t
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AddUint32 (uint32_t *val, uint32_t delta)
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{
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return __sync_add_and_fetch (val, delta);
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}
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int64_t AddInt64 (int64_t *, int64_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.AddInt64")
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__attribute__ ((no_split_stack));
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int64_t
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AddInt64 (int64_t *val, int64_t delta)
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{
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if (((uintptr_t) val & 7) != 0)
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val = NULL;
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return __sync_add_and_fetch (val, delta);
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}
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uint64_t AddUint64 (uint64_t *, uint64_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.AddUint64")
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__attribute__ ((no_split_stack));
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uint64_t
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AddUint64 (uint64_t *val, uint64_t delta)
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{
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if (((uintptr_t) val & 7) != 0)
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val = NULL;
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return __sync_add_and_fetch (val, delta);
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}
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uintptr_t AddUintptr (uintptr_t *, uintptr_t)
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__asm__ (GOSYM_PREFIX "sync_atomic.AddUintptr")
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__attribute__ ((no_split_stack));
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uintptr_t
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AddUintptr (uintptr_t *val, uintptr_t delta)
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{
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return __sync_add_and_fetch (val, delta);
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}
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int32_t LoadInt32 (int32_t *addr)
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__asm__ (GOSYM_PREFIX "sync_atomic.LoadInt32")
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__attribute__ ((no_split_stack));
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int32_t
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LoadInt32 (int32_t *addr)
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{
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int32_t v;
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, v))
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v = *addr;
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return v;
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}
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int64_t LoadInt64 (int64_t *addr)
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__asm__ (GOSYM_PREFIX "sync_atomic.LoadInt64")
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__attribute__ ((no_split_stack));
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int64_t
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LoadInt64 (int64_t *addr)
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{
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int64_t v;
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if (((uintptr_t) addr & 7) != 0)
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panicmem ();
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, v))
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v = *addr;
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return v;
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}
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uint32_t LoadUint32 (uint32_t *addr)
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__asm__ (GOSYM_PREFIX "sync_atomic.LoadUint32")
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__attribute__ ((no_split_stack));
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uint32_t
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LoadUint32 (uint32_t *addr)
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{
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uint32_t v;
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, v))
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v = *addr;
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return v;
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}
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uint64_t LoadUint64 (uint64_t *addr)
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__asm__ (GOSYM_PREFIX "sync_atomic.LoadUint64")
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__attribute__ ((no_split_stack));
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uint64_t
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LoadUint64 (uint64_t *addr)
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{
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uint64_t v;
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if (((uintptr_t) addr & 7) != 0)
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panicmem ();
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, v))
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v = *addr;
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return v;
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}
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uintptr_t LoadUintptr (uintptr_t *addr)
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__asm__ (GOSYM_PREFIX "sync_atomic.LoadUintptr")
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__attribute__ ((no_split_stack));
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uintptr_t
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LoadUintptr (uintptr_t *addr)
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{
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uintptr_t v;
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, v))
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v = *addr;
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return v;
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}
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void *LoadPointer (void **addr)
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__asm__ (GOSYM_PREFIX "sync_atomic.LoadPointer")
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__attribute__ ((no_split_stack));
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void *
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LoadPointer (void **addr)
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{
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void *v;
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, v))
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v = *addr;
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return v;
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}
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void StoreInt32 (int32_t *addr, int32_t val)
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__asm__ (GOSYM_PREFIX "sync_atomic.StoreInt32")
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__attribute__ ((no_split_stack));
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void
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StoreInt32 (int32_t *addr, int32_t val)
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{
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int32_t v;
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, val))
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v = *addr;
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}
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void StoreInt64 (int64_t *addr, int64_t val)
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__asm__ (GOSYM_PREFIX "sync_atomic.StoreInt64")
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__attribute__ ((no_split_stack));
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void
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StoreInt64 (int64_t *addr, int64_t val)
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{
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int64_t v;
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if (((uintptr_t) addr & 7) != 0)
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panicmem ();
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, val))
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v = *addr;
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}
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void StoreUint32 (uint32_t *addr, uint32_t val)
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__asm__ (GOSYM_PREFIX "sync_atomic.StoreUint32")
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__attribute__ ((no_split_stack));
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void
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StoreUint32 (uint32_t *addr, uint32_t val)
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{
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uint32_t v;
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, val))
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v = *addr;
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}
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void StoreUint64 (uint64_t *addr, uint64_t val)
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__asm__ (GOSYM_PREFIX "sync_atomic.StoreUint64")
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__attribute__ ((no_split_stack));
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void
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StoreUint64 (uint64_t *addr, uint64_t val)
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{
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uint64_t v;
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if (((uintptr_t) addr & 7) != 0)
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panicmem ();
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, val))
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v = *addr;
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}
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void StoreUintptr (uintptr_t *addr, uintptr_t val)
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__asm__ (GOSYM_PREFIX "sync_atomic.StoreUintptr")
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__attribute__ ((no_split_stack));
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void
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StoreUintptr (uintptr_t *addr, uintptr_t val)
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{
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uintptr_t v;
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, val))
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v = *addr;
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}
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void StorePointer (void **addr, void *val)
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__asm__ (GOSYM_PREFIX "sync_atomic.StorePointer")
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__attribute__ ((no_split_stack));
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void
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StorePointer (void **addr, void *val)
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{
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void *v;
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v = *addr;
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while (! __sync_bool_compare_and_swap (addr, v, val))
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v = *addr;
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}
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