_REG_SS
__asm ("movl %%ss, %0" : "=a" (ucp->uc_mcontext.__gregs[_REG_SS]));
(ucp)->uc_mcontext.__gregs[_REG_SS] = 0x23, \
mcp->__gregs[_REG_SS] = LSEL(LUDATA_SEL, SEL_UPL);
sel = gr[_REG_SS] & 0xffff;
gr32[_REG32_SS] = gr[_REG_SS];
regs[_REG_SS] = tf->tf_ss & 0xffff;
regs[_REG_SS] = LSEL(LUDATA_SEL, SEL_UPL);
tf->tf_ss = regs[_REG_SS] & 0xffff;
gr[_REG_SS] = tf->tf_ss;
tf->tf_ss = gr[_REG_SS];
gdb_regs[19] = gregs[_REG_SS];
gdb_regs[11] = gregs[_REG_SS];
gregs[_REG_SS ] = gdb_regs[19];
mctx->__gregs[_REG_SS] = tf->tf_ss & 0xFFFF;
DPRINTF("SS=%#" PRIxREGISTER "\n", r.regs[_REG_SS]);