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e783efa6ef
armv7/thumb2 provides a way to do atomics in thumb mode, but for armv6 we need a call to arm mode. this commit is based on a patch by Stephen Thomas which fixed the armv7 cases but not the armv6 ones. all of this should be revisited if/when runtime selection of thread pointer access and atomics are added.
23 lines
572 B
C
23 lines
572 B
C
#if ((__ARM_ARCH_6K__ || __ARM_ARCH_6ZK__) && !__thumb__) \
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|| __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7
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static inline __attribute__((const)) pthread_t __pthread_self()
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{
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char *p;
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__asm__( "mrc p15,0,%0,c13,c0,3" : "=r"(p) );
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return (void *)(p+8-sizeof(struct pthread));
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}
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#else
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typedef char *(*__ptr_func_t)(void) __attribute__((const));
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#define __pthread_self() \
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((pthread_t)(((__ptr_func_t)0xffff0fe0)()+8-sizeof(struct pthread)))
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#endif
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#define TLS_ABOVE_TP
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#define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread) - 8)
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#define CANCEL_REG_IP 18
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