diff options
Diffstat (limited to 'src/thread/sh/__set_thread_area.c')
-rw-r--r-- | src/thread/sh/__set_thread_area.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/thread/sh/__set_thread_area.c b/src/thread/sh/__set_thread_area.c new file mode 100644 index 00000000..9c47f78d --- /dev/null +++ b/src/thread/sh/__set_thread_area.c @@ -0,0 +1,40 @@ +#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 + +__attribute__((__visibility__("hidden"))) +extern const char __sh_cas_gusa[], __sh_cas_llsc[], __sh_cas_imask[], __sh_cas_cas_l[]; + +__attribute__((__visibility__("hidden"))) +const void *__sh_cas_ptr; + +__attribute__((__visibility__("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; +} |