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Commit b2450cc1 authored by Carlos O'Donell's avatar Carlos O'Donell Committed by Kyle McMartin
Browse files

[PARISC] Implement 5 argument clone. 



* arch/parisc/kernel/process.c (sys_clone): Use 5 args, and process
  CLONE_PARENT_SETTID, CLONE_CHILD_SETTID, CLONE_CHILD_CLEARTID.
  (copy_thread): First cut at CLONE_SETTLS.

Signed-off-by: default avatarCarlos O'Donell <carlos@parisc-linux.org>

Signed-off-by: default avatarKyle McMartin <kyle@parisc-linux.org>
parent 8b631342

arch/parisc/kernel/process.c

+29 −5
Original line number Diff line number Diff line
@@ -9,7 +9,7 @@ 
 *    Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>

 *    Copyright (C) 2000 Philipp Rumpf <prumpf with tux.org>

 *    Copyright (C) 2000 David Kennedy <dkennedy with linuxcare.com>

 *    Copyright (C) 2000 Richard Hirst <rhirst with parisc-lixux.org>

 *    Copyright (C) 2000 Richard Hirst <rhirst with parisc-linux.org>

 *    Copyright (C) 2000 Grant Grundler <grundler with parisc-linux.org>

 *    Copyright (C) 2001 Alan Modra <amodra at parisc-linux.org>

 *    Copyright (C) 2001-2002 Ryan Bradetich <rbrad at parisc-linux.org>
@@ -245,7 +245,17 @@ int 
sys_clone(unsigned long clone_flags, unsigned long usp,

	  struct pt_regs *regs)

{

	int __user *user_tid = (int __user *)regs->gr[26];

  	/* Arugments from userspace are:

	   r26 = Clone flags.

	   r25 = Child stack.

	   r24 = parent_tidptr.

	   r23 = Is the TLS storage descriptor 

	   r22 = child_tidptr 

	   

	   However, these last 3 args are only examined

	   if the proper flags are set. */

	int __user *child_tidptr;

	int __user *parent_tidptr;



	/* usp must be word aligned.  This also prevents users from

	 * passing in the value 1 (which is the signal for a special
@@ -256,7 +266,17 @@ sys_clone(unsigned long clone_flags, unsigned long usp, 
	if (usp == 0)

	  usp = regs->gr[30];



	return do_fork(clone_flags, usp, regs, 0, user_tid, NULL);

	if (clone_flags & CLONE_PARENT_SETTID)

	  parent_tidptr = (int __user *)regs->gr[24];

	else

	  parent_tidptr = NULL;

	

	if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID))

	  child_tidptr = (int __user *)regs->gr[22];

	else

	  child_tidptr = NULL;



	return do_fork(clone_flags, usp, regs, 0, parent_tidptr, child_tidptr);

}



int
@@ -332,6 +352,10 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp, 
		} else {

			cregs->kpc = (unsigned long) &child_return;

		}

		/* Setup thread TLS area from the 4th parameter in clone */

		if (clone_flags & CLONE_SETTLS)

		  cregs->cr27 = pregs->gr[23];

	

	}



	return 0;