| /* 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 |