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/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* HISTORY
* $Log: thread.c,v $
* Revision 1.4 2001/02/26 04:15:27 roland
* 2001-02-25 Roland McGrath <roland@frob.com>
*
* * i386/thread.c: Remove superfluous bzero decl,
* just include <strings.h> instead.
*
* Revision 1.3 1997/02/18 22:53:31 miles
* (cproc_setup):
* Correctly leave space at top of stack for account for GNU per-thread
* variables.
*
* Revision 1.2 1994/05/04 19:05:26 mib
* entered into RCS
*
* Revision 2.6 91/07/31 18:37:07 dbg
* Undefine cthread_sp macro around function definition.
* [91/07/30 17:36:23 dbg]
*
* Revision 2.5 91/05/14 17:57:27 mrt
* Correcting copyright
*
* Revision 2.4 91/02/14 14:20:21 mrt
* Changed to new Mach copyright
* [91/02/13 12:20:10 mrt]
*
* Revision 2.3 90/06/02 15:13:53 rpd
* Added definition of cthread_sp.
* [90/06/02 rpd]
*
* Revision 2.2 90/05/03 15:55:03 dbg
* Created (from 68020 version).
* [90/02/05 dbg]
*
*/
/*
* i386/thread.c
*
*/
#ifndef lint
static char rcs_id[] = "$Header: cvs-sans-libpthread/hurd/libthreads/i386/thread.c,v 1.5 2001/03/31 23:03:03 roland Exp $";
#endif /* not lint */
#include "../cthreads.h"
#include "../cthread_internals.h"
#include <strings.h>
#include <mach/mach.h>
/*
* Set up the initial state of a MACH thread
* so that it will invoke cthread_body(child)
* when it is resumed.
*/
void
cproc_setup(child, thread, routine)
register cproc_t child;
int thread;
int routine;
{
extern unsigned int __hurd_threadvar_max; /* GNU */
register int *top = (int *)
cproc_stack_base (child,
sizeof(ur_cthread_t *) +
/* Account for GNU per-thread variables. */
__hurd_threadvar_max *
sizeof (long int));
struct i386_thread_state state;
register struct i386_thread_state *ts = &state;
kern_return_t r;
unsigned int count;
/*
* Set up i386 call frame and registers.
* Read registers first to get correct segment values.
*/
count = i386_THREAD_STATE_COUNT;
MACH_CALL(thread_get_state(thread,i386_THREAD_STATE,(thread_state_t) &state,&count),r);
ts->eip = routine;
*--top = (int) child; /* argument to function */
*--top = 0; /* fake return address */
ts->uesp = (int) top; /* set stack pointer */
ts->ebp = 0; /* clear frame pointer */
MACH_CALL(thread_set_state(thread,i386_THREAD_STATE,(thread_state_t) &state,i386_THREAD_STATE_COUNT),r);
}
#ifdef cthread_sp
#undef cthread_sp
#endif
int
cthread_sp()
{
int x;
return (int) &x;
}
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