822d2d6ac9
- Clear the current thread's TLS pointer on exec. Previously the TLS pointer (and register) remain unchanged. - Explicitly clear the TLS pointer when new threads are created. - Make md_tls_tcb_offset per-process instead of per-thread. The layout of the TLS and TCB are identical for all threads in a process, it is only the TLS pointer values themselves that vary by thread. This also makes setting md_tls_tcb_offset in cpu_set_user_tls() redundant with the setting in exec_setregs(), so only set it in exec_setregs(). Submitted by: Alfredo Mazzinghi (1) Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D24957 |
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