/* Copyright (C) 2001 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <asm/errno.h> #include <sys/syscall.h> #include <sysdep.h> /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ .syntax no_register_prefix .text ENTRY (__clone) /* Sanity check arguments: No NULL function pointers. Allow a NULL stack pointer though; it makes the kernel allocate stack. */ test.d r10 beq 1f nop /* We need to muck with a few registers. */ movem r1,[sp=sp-8] /* Save the function pointer and argument. We can't save them onto the new stack since it can be NULL. */ move.d r10,r0 move.d r13,r1 /* Move the other arguments into place for the system call. */ move.d r11,r10 move.d r12,r11 /* Do the system call. */ movu.w SYS_ify (clone),r9 break 13 test.d r10 beq .Lthread_start nop /* Jump to error handler if we get (unsigned) -4096 .. 0xffffffff. */ cmps.w -4096,r10 bhs 0f movem [sp+],r1 /* In parent, successful return. (Avoid using "ret" - it's a macro.) */ Ret nop .Lthread_start: /* Terminate frame pointers here. */ moveq 0,r8 /* I've told you once. */ move.d r1,r10 jsr r0 SETUP_PIC PLTCALL (_exit) /* Die horribly. */ test.d [6809] /* Stop the unstoppable. */ 9: ba 9b nop /* Local error handler. */ 1: movs.w -EINVAL,r10 /* Drop through into the ordinary error handler. */ PSEUDO_END (__clone) .globl clone clone = __clone