github.com/afumu/libc@v0.0.6/musl/arch/or1k/pthread_arch.h (about)

     1  /* or1k use variant I, but with the twist that tp points to the end of TCB */
     2  static inline struct pthread *__pthread_self()
     3  {
     4  #ifdef __clang__
     5  	char *tp;
     6  	__asm__ ("l.ori %0, r10, 0" : "=r" (tp) );
     7  #else
     8  	register char *tp __asm__("r10");
     9  	__asm__ ("" : "=r" (tp) );
    10  #endif
    11  	return (struct pthread *) (tp - sizeof(struct pthread));
    12  }
    13  
    14  #define TLS_ABOVE_TP
    15  #define GAP_ABOVE_TP 0
    16  #define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread))
    17  
    18  #define MC_PC regs.pc