89 lines
2.1 KiB
ArmAsm
89 lines
2.1 KiB
ArmAsm
/* Copyright (C) 1996 Free Software Foundation, Inc.
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Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx)
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FIXME: Currently only 6 parameters can be passsed
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to the clone function.
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based on code written for the Intel by Richard
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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 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
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, 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 *child_stack, int flags, int nargs, ...) */
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.text
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.align 4
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.globl __libc_clone
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.type __libc_clone,@function
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.weak clone
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__clone = __libc_clone
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clone = __libc_clone
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__libc_clone:
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save %sp,-96,%sp
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/* sanity check arguments */
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tst %i0
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be __clone_syscall_error
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tst %i1
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be __clone_syscall_error
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cmp %i3,0
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bl __clone_syscall_error
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nop
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/* Flush the register windows */
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ta 3
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/* Parameters for system call */
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mov %i1,%o1
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mov %i2,%o0
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/* parameters that are on the stack for routine */
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#define P(x) 0x5c+(x*4)
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ld [%fp+P(0)],%o2
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ld [%fp+P(1)],%o3
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ld [%fp+P(2)],%o4
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ld [%fp+P(3)],%o5
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/* Do the system call */
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set __NR_clone,%g1
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ta 0x10
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bcs __clone_syscall_error
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tst %o1
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bne __thread_start
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nop
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mov %o0,%i0
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ret
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restore
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__clone_syscall_error:
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call __errno_location
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set EINVAL,%i0
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st %i0,[%o0]
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mov -1,%i0
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ret
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restore
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__thread_start:
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mov %i5,%o1
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call %i0
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mov %i4,%o0
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call _exit,0
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nop
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