arch/arm/pthread_arch.h

   1 #if ((__ARM_ARCH_6K__ || __ARM_ARCH_6KZ__ || __ARM_ARCH_6ZK__) && !__thumb__) \
   2  || __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7
   3
   4 static inline uintptr_t __get_tp()
   5 {
   6         uintptr_t tp;
   7         __asm__ ( "mrc p15,0,%0,c13,c0,3" : "=r"(tp) );
   8         return tp;
   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 uintptr_t __get_tp()
  20 {
  21         extern hidden uintptr_t __a_gettp_ptr;
  22         register uintptr_t tp __asm__("r0");
  23         __asm__ ( BLX " %1" : "=r"(tp) : "r"(__a_gettp_ptr) : "cc", "lr" );
  24         return tp;
  25 }
  26
  27 #endif
  28
  29 #define TLS_ABOVE_TP
  30 #define GAP_ABOVE_TP 8
  31
  32 #define MC_PC arm_pc