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#include <stdint.h>
#include <elf.h>
#include "pthread_impl.h"
#include "libc.h"
#define HWCAP_TLS (1 << 15)
extern const unsigned char __attribute__((__visibility__("hidden")))
__a_barrier_dummy[], __a_barrier_oldkuser[],
__a_barrier_v6[], __a_barrier_v7[],
__a_cas_dummy[], __a_cas_v6[], __a_cas_v7[],
__a_gettp_dummy[];
#define __a_barrier_kuser 0xffff0fa0
#define __a_cas_kuser 0xffff0fc0
#define __a_gettp_kuser 0xffff0fe0
extern uintptr_t __attribute__((__visibility__("hidden")))
__a_barrier_ptr, __a_cas_ptr, __a_gettp_ptr;
#define SET(op,ver) (__a_##op##_ptr = \
(uintptr_t)__a_##op##_##ver - (uintptr_t)__a_##op##_dummy)
int __set_thread_area(void *p)
{
#if !__ARM_ARCH_7A__ && !__ARM_ARCH_7R__ && __ARM_ARCH < 7
if (__hwcap & HWCAP_TLS) {
size_t *aux;
SET(cas, v7);
SET(barrier, v7);
for (aux=libc.auxv; *aux; aux+=2) {
if (*aux != AT_PLATFORM) continue;
const char *s = (void *)aux[1];
if (s[0]!='v' || s[1]!='6' || s[2]-'0'<10u) break;
SET(cas, v6);
SET(barrier, v6);
break;
}
} else {
int ver = *(int *)0xffff0ffc;
SET(gettp, kuser);
SET(cas, kuser);
SET(barrier, kuser);
if (ver < 2) a_crash();
if (ver < 3) SET(barrier, oldkuser);
}
#endif
return __syscall(0xf0005, p);
}
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