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musl/src/thread/__tls_get_addr.c

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separate __tls_get_addr implementation from dynamic linker/init_tls such separation serves multiple purposes: - by having the common path for __tls_get_addr alone in its own function with a tail call to the slow case, code generation is greatly improved. - by having __tls_get_addr in it own file, it can be replaced on a per-arch basis as needed, for optimization or ABI-specific purposes. - by removing __tls_get_addr from __init_tls.c, a few bytes of code are shaved off of static binaries (which are unlikely to use this function unless the linker messed up).
2014-06-19 02:59:44 -04:00
#include <stddef.h>
#include "pthread_impl.h"
#include "libc.h"
void *__tls_get_new(size_t *) ATTR_LIBC_VISIBILITY;
void *__tls_get_addr(size_t *v)
{
pthread_t self = __pthread_self();
#ifdef SHARED
if (v[0]<=(size_t)self->dtv[0])
return (char *)self->dtv[v[0]]+v[1];
return __tls_get_new(v);
#else
return (char *)self->dtv[1]+v[1];
#endif
}
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