[352] | 1 | #include <stdint.h>
|
---|
| 2 | #include <elf.h>
|
---|
| 3 | #include "pthread_impl.h"
|
---|
| 4 | #include "libc.h"
|
---|
| 5 |
|
---|
| 6 | #define HWCAP_TLS (1 << 15)
|
---|
| 7 |
|
---|
| 8 | extern const unsigned char __attribute__((__visibility__("hidden")))
|
---|
| 9 | __a_barrier_oldkuser[], __a_barrier_v6[], __a_barrier_v7[],
|
---|
| 10 | __a_cas_v6[], __a_cas_v7[],
|
---|
| 11 | __a_gettp_cp15[];
|
---|
| 12 |
|
---|
| 13 | #define __a_barrier_kuser 0xffff0fa0
|
---|
| 14 | #define __a_barrier_oldkuser (uintptr_t)__a_barrier_oldkuser
|
---|
| 15 | #define __a_barrier_v6 (uintptr_t)__a_barrier_v6
|
---|
| 16 | #define __a_barrier_v7 (uintptr_t)__a_barrier_v7
|
---|
| 17 |
|
---|
| 18 | #define __a_cas_kuser 0xffff0fc0
|
---|
| 19 | #define __a_cas_v6 (uintptr_t)__a_cas_v6
|
---|
| 20 | #define __a_cas_v7 (uintptr_t)__a_cas_v7
|
---|
| 21 |
|
---|
| 22 | #define __a_gettp_kuser 0xffff0fe0
|
---|
| 23 | #define __a_gettp_cp15 (uintptr_t)__a_gettp_cp15
|
---|
| 24 |
|
---|
| 25 | extern uintptr_t __attribute__((__visibility__("hidden")))
|
---|
| 26 | __a_barrier_ptr, __a_cas_ptr, __a_gettp_ptr;
|
---|
| 27 |
|
---|
| 28 | int __set_thread_area(void *p)
|
---|
| 29 | {
|
---|
| 30 | #if !__ARM_ARCH_7A__ && !__ARM_ARCH_7R__ && __ARM_ARCH < 7
|
---|
| 31 | if (__hwcap & HWCAP_TLS) {
|
---|
| 32 | size_t *aux;
|
---|
| 33 | __a_cas_ptr = __a_cas_v7;
|
---|
| 34 | __a_barrier_ptr = __a_barrier_v7;
|
---|
| 35 | for (aux=libc.auxv; *aux; aux+=2) {
|
---|
| 36 | if (*aux != AT_PLATFORM) continue;
|
---|
| 37 | const char *s = (void *)aux[1];
|
---|
| 38 | if (s[0]!='v' || s[1]!='6' || s[2]-'0'<10u) break;
|
---|
| 39 | __a_cas_ptr = __a_cas_v6;
|
---|
| 40 | __a_barrier_ptr = __a_barrier_v6;
|
---|
| 41 | break;
|
---|
| 42 | }
|
---|
| 43 | } else {
|
---|
| 44 | int ver = *(int *)0xffff0ffc;
|
---|
| 45 | __a_gettp_ptr = __a_gettp_kuser;
|
---|
| 46 | __a_cas_ptr = __a_cas_kuser;
|
---|
| 47 | __a_barrier_ptr = __a_barrier_kuser;
|
---|
| 48 | if (ver < 2) a_crash();
|
---|
| 49 | if (ver < 3) __a_barrier_ptr = __a_barrier_oldkuser;
|
---|
| 50 | }
|
---|
| 51 | #endif
|
---|
| 52 | return __syscall(ARM_SYS_set_tls, p);
|
---|
| 53 | }
|
---|