FS_BASE
if (data->arch_data.fs_base != regs->gp[FS_BASE / sizeof(unsigned long)]) {
data->arch_data.fs_base = regs->gp[FS_BASE / sizeof(unsigned long)];
case FS_BASE:
[FS_BASE >> 3] = HOST_FS_BASE,
case FS_BASE:
#ifndef FS_BASE
current->thread.regs.regs.gp[FS_BASE / sizeof(unsigned long)] =
ret = put_user(current->thread.regs.regs.gp[FS_BASE / sizeof(unsigned long)], arg2);
t->thread.regs.regs.gp[FS_BASE / sizeof(unsigned long)] = tls;