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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
89 lines
2.2 KiB
ArmAsm
89 lines
2.2 KiB
ArmAsm
/* Copyright (C) 1997, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Richard Henderson (rth@tamu.edu).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* clone() is even more special than fork() as it mucks with stacks
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and invokes a function in the right context after its all over. */
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#include <asm/errno.h>
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#include <asm/unistd.h>
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/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
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.text
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.align 4
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.globl __clone
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.type __clone,@function
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__clone:
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save %sp, -192, %sp
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/* sanity check arguments */
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brz,pn %i0, 99f
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mov %i0, %l0 /* save fn */
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brz,pn %i1, 99f
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mov %i3, %l3 /* save arg */
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/* Do the system call */
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mov %i1, %o1
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mov %i2, %o0
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set __NR_clone, %g1
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ta 0x6d
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bcs,pn %xcc, 99f
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nop
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brnz,pn %o1, __thread_start
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mov %o0, %i0
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ret
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restore
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99:
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#ifndef _LIBC_REENTRANT
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#ifdef PIC
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call 1f
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sethi %hi(_GLOBAL_OFFSET_TABLE_-(99b-.)), %l7
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1: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(99b-.)), %l7
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add %l7, %o7, %l7
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set EINVAL, %i0
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sethi %hi(errno), %g2
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or %g2, %lo(errno), %g2
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st %i0, [%l7+%g2]
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#else
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sethi %hi(errno), %g2
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set EINVAL, %i0
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st %i0, [%g2+%lo(errno)]
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#endif
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#else
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call __errno_location
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nop
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st %i0, [%o0]
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#endif
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ret
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restore %g0,-1,%o0
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.size __clone, .-__clone
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.type __thread_start,@function
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__thread_start:
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mov %g0, %fp /* terminate backtrace */
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sub %sp, 6*8, %sp /* provide arg storage */
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call %l0
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mov %l3,%o0
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call _exit,0
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nop
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.size __thread_start, .-__thread_start
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weak_alias(__clone, clone)
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