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