github.com/afumu/libc@v0.0.6/musl/src/thread/i386/tls.s (about)

     1  .text
     2  .global ___tls_get_addr
     3  .type ___tls_get_addr,@function
     4  ___tls_get_addr:
     5  	mov %gs:4,%edx
     6  	mov (%eax),%ecx
     7  	mov 4(%eax),%eax
     8  	add (%edx,%ecx,4),%eax
     9  	ret