__tls_get_addr symbol

[kdevel]

On Monday, 13 April 2020 at 14:42:25 UTC, Marius Cristian Baciu 
wrote:
> [...] I am having some trouble locating a symbol referenced in 
> rt/sections_elf_shared.d (__tls_get_addr).
> Could someone tell me where does the runtime expect to retrieve 
> its implementation from

$ gdb test
(gdb) b __tls_get_addr
Breakpoint 1 at 0x4351b8
(gdb) r
Starting program: /tmp/test
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Breakpoint 1, 0x00007ffff7df09c0 in __tls_get_addr () from 
/lib64/ld-linux-x86-64.so.2
[...]

> and what's its purpose?

It "[c]omputes the thread-specific address of a TLS variable[.]" 
[1]

[1] http://www.google.com/search?q=drepper+tls.pdf