static void
tcb_fixup(int mainthread)
{
void *tls, *newtcb, *oldtcb;
size_t tls_size, tcb_size;
// TODO(jsing): Remove once OpenBSD 6.1 is released and OpenBSD 5.9 is
// no longer supported.
// The OpenBSD ld.so(1) does not currently support PT_TLS. As a result,
// we need to allocate our own TLS space while preserving the existing
// TCB or TIB that has been setup via librthread.
tcb_size = has_tib ? TIB_SIZE : TCB_SIZE;
tls_size = TLS_SIZE + tcb_size;
tls = malloc(tls_size);
if(tls == NULL)
abort();
// The signal trampoline expects the TLS slots to be zeroed.
bzero(tls, TLS_SIZE);
oldtcb = __get_tcb();
newtcb = tls + TLS_SIZE;
bcopy(oldtcb, newtcb, tcb_size);
if(has_tib) {
// Fix up self pointer.
*(uintptr_t *)(newtcb) = (uintptr_t)newtcb;
}
__set_tcb(newtcb);
// NOTE(jsing, minux): we can't free oldtcb without causing double-free
// problem. so newtcb will be memory leaks. Get rid of this when OpenBSD
// has proper support for PT_TLS.
}
static void
tcb_fixup(int mainthread)
{
void *newtcb, *oldtcb;
// The OpenBSD ld.so(1) does not currently support PT_TLS. As a result,
// we need to allocate our own TLS space while preserving the existing
// TCB that has been setup via librthread.
newtcb = malloc(TCB_SIZE + TLS_SIZE);
if(newtcb == NULL)
abort();
// The signal trampoline expects the TLS slots to be zeroed.
bzero(newtcb, TLS_SIZE);
oldtcb = __get_tcb();
bcopy(oldtcb, newtcb + TLS_SIZE, TCB_SIZE);
__set_tcb(newtcb + TLS_SIZE);
// NOTE(jsing, minux): we can't free oldtcb without causing double-free
// problem. so newtcb will be memory leaks. Get rid of this when OpenBSD
// has proper support for PT_TLS.
}
