[glibc.git] / nptl / sysdeps / unix / sysv / linux / mips / vfork.S

/* Copyright (C) 2005 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <tls.h>

/* Save the PID value.  */
#define SAVE_PID \
	READ_THREAD_POINTER(v1);	/* Get the thread pointer.  */	\
	lw	a2, PID_OFFSET(v1);	/* Load the saved PID.  */	\
	subu	a2, $0, a2;		/* Negate it.  */		\
	bnez	a2, 1f;			/* If it was zero... */		\
	lui	a2, 0x8000;		/* use 0x80000000 instead.  */	\
1:	sw	a2, PID_OFFSET(v1);	/* Store the temporary PID.  */

/* Restore the old PID value in the parent.  */
#define RESTORE_PID \
	beqz	v0, 1f;			/* If we are the parent... */	\
	READ_THREAD_POINTER(v1);	/* Get the thread pointer.  */	\
	lw	a2, PID_OFFSET(v1);	/* Load the saved PID.  */	\
	subu	a2, $0, a2;		/* Re-negate it.  */		\
	lui	a0, 0x8000;		/* Load 0x80000000... */	\
	bne	a2, a0, 2f;		/* ... compare against it... */	\
	li	a2, 0;			/* ... use 0 instead.  */	\
2:	sw	a2, PID_OFFSET(v1);	/* Restore the PID.  */		\
1:

#include <../sysdeps/unix/sysv/linux/mips/vfork.S>
Commit	Line	Data
f850220b AJ	1	/* Copyright (C) 2005 Free Software Foundation, Inc.
	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Lesser General Public License for more details.
	13
	14	You should have received a copy of the GNU Lesser General Public
	15	License along with the GNU C Library; if not, write to the Free
	16	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	17	02111-1307 USA. */
	18
	19	#include <tls.h>
	20
	21	/* Save the PID value. */
	22	#define SAVE_PID \
	23	READ_THREAD_POINTER(v1); /* Get the thread pointer. */ \
	24	lw a2, PID_OFFSET(v1); /* Load the saved PID. */ \
	25	subu a2, $0, a2; /* Negate it. */ \
	26	bnez a2, 1f; /* If it was zero... */ \
	27	lui a2, 0x8000; /* use 0x80000000 instead. */ \
	28	1: sw a2, PID_OFFSET(v1); /* Store the temporary PID. */
	29
	30	/* Restore the old PID value in the parent. */
	31	#define RESTORE_PID \
	32	beqz v0, 1f; /* If we are the parent... */ \
	33	READ_THREAD_POINTER(v1); /* Get the thread pointer. */ \
	34	lw a2, PID_OFFSET(v1); /* Load the saved PID. */ \
	35	subu a2, $0, a2; /* Re-negate it. */ \
	36	lui a0, 0x8000; /* Load 0x80000000... */ \
	37	bne a2, a0, 2f; /* ... compare against it... */ \
	38	li a2, 0; /* ... use 0 instead. */ \
	39	2: sw a2, PID_OFFSET(v1); /* Restore the PID. */ \
	40	1:
	41
	42	#include <../sysdeps/unix/sysv/linux/mips/vfork.S>