/* Copyright (C) 2001, 2003 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, see <http://www.gnu.org/licenses/>. */ #include <features.h> #include <sys/syscall.h> #include "sysdep.h" #define _ERRNO_H 1 #include <bits/errno.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. */ cmpq 0,r10 beq 1f nop /* We need to muck with a few registers. */ subq 8,sp movem r1,[sp] /* 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 cmpq 0,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 #ifdef __arch_v32 /* Is this the right place for an argument? */ jsr r0 move.d r1,r10 #else /* I've told you once. */ move.d r1,r10 jsr r0 #endif SETUP_PIC PLTCALL (HIDDEN_JUMPTARGET(_exit)) /* Die horribly. */ move.d 6809,r13 test.d [r13] /* 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)