/* Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson (rth@tamu.edu). The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ /* clone() is even more special than fork() as it mucks with stacks and invokes a function in the right context after its all over. */ #include <asm/errno.h> #include <sys/syscall.h> #include "NM_Macros.S" /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ .text .align 2 .globl clone .type clone,@function clone: save %sp,-16 MOVIP %l0, -EINVAL /* sanity check arguments */ skprnz %i0 /* no NULL function pointers */ br CLONE_ERROR_LABEL mov %o0, %i2 skprnz %i1 /* no NULL stack pointers */ br CLONE_ERROR_LABEL mov %o1, %i1 /* Do the system call */ MOVIP %g1, __NR_clone trap 63 /* if ret >=0? */ cmpi %o0, 0 skps cc_pl br CLONE_ERROR_LABEL mov %l0, %o0 /* Start thread */ skprz %o1 br __thread_start nop mov %i0, %o0 ret restore CLONE_ERROR_LABEL: neg %l0 MOVIA %g1, __errno_location@h call %g1 nop st [%o0], %l0 /* store errno */ xor %i0, %i0 dec %i0 /* retval=-1 */ ret restore .size clone, .-clone .type __thread_start,@function __thread_start: call %i0 mov %o0, %i3 MOVIA %g1, _exit@h call %g1 nop .size __thread_start, .-__thread_start