swapcontext
swapcontext(&o->fibre, &n->fibre);
__sym_compat(swapcontext, __impl_swapcontext, FBSD_1.0);
__weak_reference(swapcontext, __impl_swapcontext);
__sym_default(swapcontext, swapcontext, FBSD_1.2);
return (INTERPOS_SYS(swapcontext, oucp, ucp));
ATF_REQUIRE_EQ(swapcontext(&ctx[0], &ctx[1]), 0);
ATF_REQUIRE_EQ(swapcontext(&ctx[0], &ctx[1]), 0);
ATF_REQUIRE_EQ(swapcontext(&ctx[0], &ctx[1]), 0);
ATF_REQUIRE_EQ(swapcontext(&ctx[0], &ctx[1]), 0);
ATF_REQUIRE_EQ(swapcontext(&ctx[0], &ctx[1]), 0);
ATF_REQUIRE_EQ(swapcontext(&ctx[0], &ctx[1]), 0);
res = swapcontext(&uctx_save, &uctx_switch);
SLOT(swapcontext, __sys_swapcontext),
SLOT(swapcontext);
int swapcontext(ucontext_t *, const ucontext_t *);