GUGS32_SEL
ASSYM(KUG32SEL, GSEL(GUGS32_SEL, SEL_UPL));
PCPU_SET(gs32p, &gdt[GUGS32_SEL]);
_ugssel = GSEL(GUGS32_SEL, SEL_UPL);
[GUGS32_SEL] = { /* 3 32 bit %fs Descriptor for user */
pc->pc_gs32p = &gdt[GUGS32_SEL];
info.entry_number = GUGS32_SEL;
td->td_frame->tf_gs = GSEL(GUGS32_SEL, SEL_UPL);
case GUGS32_SEL:
info.entry_number = GUGS32_SEL;