+
−
/* Taken with thanks from LinuxThreads 0.6 */+
−
+
−
/* This is no longer necessary with glibc-2.1, which has it's own clone() */+
−
#ifdef linux+
−
/* Look to see if glibc is available, and if so, what version */+
−
#include <features.h>+
−
+
−
#if (__GLIBC__ > 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 1))+
−
#define HAVE_CLONE+
−
#endif /* glibc 2.1 or newer */+
−
#endif /* linux */+
−
+
−
#if defined(linux) && !defined(SDL_USE_PTHREADS) && !defined(HAVE_CLONE)+
−
+
−
#if defined(__i386__)+
−
/************************************************************************/+
−
/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.+
−
   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 Library General Public License as+
−
published by the Free Software Foundation; either version 2 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+
−
Library General Public License for more details.+
−
+
−
You should have received a copy of the GNU Library General Public+
−
License along with the GNU C Library; see the file COPYING.LIB.  If+
−
not, write to the Free Software Foundation, Inc., 675 Mass Ave,+
−
+
−
#ifdef SAVE_RCSID+
−
static char rcsid =+
−
 "@(#) $Id$";+
−
#endif+
−
Cambridge, MA 02139, 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 <asm/unistd.h>+
−
+
−
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */+
−
+
−
        .text+
−
	.align	4+
−
	.globl	__clone+
−
        .type   __clone,@function+
−
	.weak	clone+
−
	clone   = __clone+
−
__clone:+
−
	/* Sanity check arguments.  */+
−
	movl	$-EINVAL,%eax+
−
	movl	4(%esp),%ecx		/* no NULL function pointers */+
−
	testl	%ecx,%ecx+
−
	jz	syscall_error+
−
	movl	8(%esp),%ecx		/* no NULL stack pointers */+
−
	testl	%ecx,%ecx+
−
	jz	syscall_error+
−
+
−
	/* Insert the argument onto the new stack.  */+
−
	subl	$8,%ecx+
−
	movl	16(%esp),%eax+
−
	movl	%eax,4(%ecx)+
−
+
−
	/* Save the function pointer as the zeroth argument. */+
−
	/* It will be popped off in the child in the ebx frobbing below.  */+
−
	movl	4(%esp),%eax+
−
	movl	%eax,0(%ecx)+
−
+
−
	/* Do the system call */+
−
	pushl	%ebx+
−
	movl	16(%esp),%ebx+
−
	movl	$__NR_clone,%eax+
−
	int	$0x80+
−
	popl	%ebx+
−
+
−
	test	%eax,%eax+
−
	jl	syscall_error+
−
	jz	thread_start+
−
+
−
	ret+
−
+
−
syscall_error:+
−
	negl    %eax+
−
        pushl   %eax+
−
#ifdef __PIC__+
−
        call    __errno_location@PLT+
−
#else+
−
        call    __errno_location+
−
#endif+
−
        popl    0(%eax)+
−
	movl	$-1, %eax+
−
	ret+
−
+
−
thread_start:+
−
	subl	%ebp,%ebp	/* terminate the stack frame */+
−
	call	*%ebx+
−
        pushl   %eax+
−
#ifdef __PIC__+
−
	call	_exit@PLT+
−
#else+
−
	call	_exit+
−
#endif+
−
/************************************************************************/+
−
#elif defined(sparc)+
−
/************************************************************************/+
−
/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.+
−
   Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx)+
−
   Based on code written for the Intel 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 Library General Public License as+
−
published by the Free Software Foundation; either version 2 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+
−
Library General Public License for more details.+
−
+
−
You should have received a copy of the GNU Library General Public+
−
License along with the GNU C Library; see the file COPYING.LIB.  If+
−
not, write to the Free Software Foundation, Inc., 675 Mass Ave,+
−
Cambridge, MA 02139, 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 <asm/unistd.h>+
−
+
−
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */+
−
+
−
	.text+
−
	.align	4+
−
	.globl	__clone+
−
	.type	__clone,@function+
−
	.weak	clone+
−
	clone   = __clone+
−
__clone:	+
−
	save	%sp,-96,%sp+
−
	/* sanity check arguments */+
−
	tst	%i0+
−
	be	__clone_syscall_error+
−
	tst	%i1+
−
	be	__clone_syscall_error+
−
        nop+
−
+
−
	/* Do the system call */+
−
	mov	%i1,%o1+
−
	mov	%i2,%o0+
−
	set	__NR_clone,%g1+
−
	ta	0x10+
−
	bcs	__clone_syscall_error+
−
	tst	%o1+
−
	bne	__thread_start+
−
	nop+
−
	mov	%o0,%i0+
−
	ret+
−
	restore+
−
	+
−
__clone_syscall_error:+
−
	call	__errno_location+
−
	set	EINVAL,%i0+
−
	st	%i0,[%o0]+
−
	mov	-1,%i0+
−
	ret+
−
	restore+
−
+
−
__thread_start:+
−
	call	%i0+
−
	mov	%i3,%o0+
−
	call	_exit,0+
−
	nop+
−
/************************************************************************/+
−
#else +
−
#error "Unknown Linux architecture"+
−
#endif+
−
+
−
#endif /* Linux && ! SDL_USE_PTHREADS */+
−