diff options
Diffstat (limited to 'arch/sh/src/__set_thread_area.c')
-rw-r--r-- | arch/sh/src/__set_thread_area.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/sh/src/__set_thread_area.c b/arch/sh/src/__set_thread_area.c new file mode 100644 index 00000000..1d3e0225 --- /dev/null +++ b/arch/sh/src/__set_thread_area.c @@ -0,0 +1,34 @@ +#include "pthread_impl.h" +#include "libc.h" +#include "sh_atomic.h" +#include <elf.h> + +/* Also perform sh-specific init */ + +#define CPU_HAS_LLSC 0x0040 + +__attribute__((__visibility__("hidden"))) unsigned __sh_atomic_model, __sh_nommu; + +int __set_thread_area(void *p) +{ + size_t *aux; + __asm__ __volatile__ ( "ldc %0, gbr" : : "r"(p) : "memory" ); +#ifndef __SH4A__ + if (__hwcap & CPU_HAS_LLSC) { + __sh_atomic_model = SH_A_LLSC; + return 0; + } +#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_atomic_model = SH_A_IMASK; + __sh_nommu = 1; + return 0; + } +#endif + /* __sh_atomic_model = SH_A_GUSA; */ /* 0, default */ +#endif + return 0; +} |