arch/arm/pthread_arch.h

   1 #if ((__ARM_ARCH_6K__ || __ARM_ARCH_6ZK__) && !__thumb__) \
   2  || __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7
   3
   4 static inline pthread_t __pthread_self()
   5 {
   6         char *p;
   7         __asm__ __volatile__ ( "mrc p15,0,%0,c13,c0,3" : "=r"(p) );
   8         return (void *)(p+8-sizeof(struct pthread));
   9 }
  10
  11 #else
  12
  13 #if __ARM_ARCH_4__ || __ARM_ARCH_4T__ || __ARM_ARCH == 4
  14 #define BLX "mov lr,pc\n\tbx"
  15 #else
  16 #define BLX "blx"
  17 #endif
  18
  19 static inline pthread_t __pthread_self()
  20 {
  21         extern uintptr_t __attribute__((__visibility__("hidden"))) __a_gettp_ptr;
  22         register uintptr_t p __asm__("r0");
  23         __asm__ __volatile__ ( BLX " %1" : "=r"(p) : "r"(__a_gettp_ptr) : "cc", "lr" );
  24         return (void *)(p+8-sizeof(struct pthread));
  25 }
  26
  27 #endif
  28
  29 #define TLS_ABOVE_TP
  30 #define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread) - 8)
  31
  32 #define MC_PC arm_pc