/* * File: arch/blackfin/kernel/entry.S * Based on: * Author: * * Created: * Description: * * Modified: * Copyright 2004-2006 Analog Devices Inc. * * Bugs: Enter bugs at http://blackfin.uclinux.org/ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see the file COPYING, or write * to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include <linux/linkage.h> #include <asm/thread_info.h> #include <asm/errno.h> #include <asm/asm-offsets.h> #include <asm/mach-common/context.S> #ifdef CONFIG_EXCPT_IRQ_SYSC_L1 .section .l1.text #else .text #endif ENTRY(_ret_from_fork) SP += -12; call _schedule_tail; SP += 12; r0 = [sp + PT_IPEND]; cc = bittst(r0,1); if cc jump .Lin_kernel; RESTORE_CONTEXT rti; .Lin_kernel: bitclr(r0,1); [sp + PT_IPEND] = r0; /* do a 'fake' RTI by jumping to [RETI] * to avoid clearing supervisor mode in child */ r0 = [sp + PT_PC]; [sp + PT_P0] = r0; RESTORE_ALL_SYS jump (p0); ENDPROC(_ret_from_fork) ENTRY(_sys_fork) r0 = -EINVAL; rts; ENDPROC(_sys_fork) ENTRY(_sys_vfork) r0 = sp; r0 += 24; [--sp] = rets; SP += -12; call _bfin_vfork; SP += 12; rets = [sp++]; rts; ENDPROC(_sys_vfork) ENTRY(_sys_clone) r0 = sp; r0 += 24; [--sp] = rets; SP += -12; call _bfin_clone; SP += 12; rets = [sp++]; rts; ENDPROC(_sys_clone) ENTRY(_sys_rt_sigreturn) r0 = sp; r0 += 24; [--sp] = rets; SP += -12; call _do_rt_sigreturn; SP += 12; rets = [sp++]; rts; ENDPROC(_sys_rt_sigreturn)