blob: 34264bddd9c10d81424df36571af1abb5ef1f8db (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
#include "pthread_impl.h"
#include "libc.h"
#include <elf.h>
/* Also perform sh-specific init */
#define CPU_HAS_LLSC 0x0040
#define CPU_HAS_CAS_L 0x0400
extern hidden const char __sh_cas_gusa[], __sh_cas_llsc[], __sh_cas_imask[], __sh_cas_cas_l[];
hidden const void *__sh_cas_ptr;
hidden unsigned __sh_nommu;
int __set_thread_area(void *p)
{
size_t *aux;
__asm__ __volatile__ ( "ldc %0, gbr" : : "r"(p) : "memory" );
#ifndef __SH4A__
__sh_cas_ptr = __sh_cas_gusa;
#if !defined(__SH3__) && !defined(__SH4__)
for (aux=libc.auxv; *aux; aux+=2) {
if (*aux != AT_PLATFORM) continue;
const char *s = (void *)aux[1];
if (s[0]!='s' || s[1]!='h' || s[2]!='2' || s[3]-'0'<10u) break;
__sh_cas_ptr = __sh_cas_imask;
__sh_nommu = 1;
}
#endif
if (__hwcap & CPU_HAS_CAS_L)
__sh_cas_ptr = __sh_cas_cas_l;
else if (__hwcap & CPU_HAS_LLSC)
__sh_cas_ptr = __sh_cas_llsc;
#endif
return 0;
}
|