[uClibc-cvs] uClibc/libc/sysdeps/linux/powerpc/bits atomicity.h,NONE,1.1 machine-gmon.h,NONE,1.1 profil-counter.h,NONE,1.1 sigcontextinfo.h,NONE,1.1 stackinfo.h,NONE,1.1

Erik Andersen andersen at codepoet.org
Mon Mar 3 20:58:36 UTC 2003


Update of /var/cvs/uClibc/libc/sysdeps/linux/powerpc/bits
In directory winder:/tmp/cvs-serv13798/libc/sysdeps/linux/powerpc/bits

Added Files:
	atomicity.h machine-gmon.h profil-counter.h sigcontextinfo.h 
	stackinfo.h 
Log Message:
Initial effort at adding profiling support.


--- NEW FILE: atomicity.h ---
/* Low-level functions for atomic operations.  PowerPC version.
   Copyright (C) 1997, 1998, 1999, 2000 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.  */

#ifndef _ATOMICITY_H
#define _ATOMICITY_H	1

#include <inttypes.h>

#if BROKEN_PPC_ASM_CR0
# define __ATOMICITY_INLINE /* nothing */
#else
# define __ATOMICITY_INLINE inline
#endif

static __ATOMICITY_INLINE int
__attribute__ ((unused))
exchange_and_add (volatile uint32_t *mem, int val)
{
  int tmp, result;
  __asm__ ("\n\
0:	lwarx	%0,0,%2	\n\
	add%I3	%1,%0,%3	\n\
	stwcx.	%1,0,%2	\n\
	bne-	0b	\n\
" : "=&b"(result), "=&r"(tmp) : "r" (mem), "Ir"(val) : "cr0", "memory");
  return result;
}

static __ATOMICITY_INLINE void
__attribute__ ((unused))
atomic_add (volatile uint32_t *mem, int val)
{
  int tmp;
  __asm__ ("\n\
0:	lwarx	%0,0,%1	\n\
	add%I2	%0,%0,%2	\n\
	stwcx.	%0,0,%1	\n\
	bne-	0b	\n\
" : "=&b"(tmp) : "r" (mem), "Ir"(val) : "cr0", "memory");
}

static __ATOMICITY_INLINE int
__attribute__ ((unused))
compare_and_swap (volatile long int *p, long int oldval, long int newval)
{
  int result;
  __asm__ ("\n\
0:	lwarx	%0,0,%1	\n\
	sub%I2c.	%0,%0,%2	\n\
	cntlzw	%0,%0	\n\
	bne-	1f	\n\
	stwcx.	%3,0,%1	\n\
	bne-	0b	\n\
1:	\n\
" : "=&b"(result) : "r"(p), "Ir"(oldval), "r"(newval) : "cr0", "memory");
  return result >> 5;
}

static __ATOMICITY_INLINE long int
__attribute__ ((unused))
always_swap (volatile long int *p, long int newval)
{
  long int result;
  __asm__ ("\n\
0:	lwarx	%0,0,%1	\n\
	stwcx.	%2,0,%1	\n\
	bne-	0b	\n\
" : "=&r"(result) : "r"(p), "r"(newval) : "cr0", "memory");
  return result;
}

static __ATOMICITY_INLINE int
__attribute__ ((unused))
test_and_set (volatile long int *p, long int newval)
{
  int result;
  __asm__ ("\n\
0:	lwarx	%0,0,%1	\n\
	cmpwi	%0,0	\n\
	bne-	1f	\n\
	stwcx.	%2,0,%1	\n\
	bne-	0b	\n\
1:	\n\
" : "=&r"(result) : "r"(p), "r"(newval) : "cr0", "memory");
  return result;
}

#endif /* atomicity.h */

--- NEW FILE: machine-gmon.h ---
/* PowerPC-specific implementation of profiling support.
   Copyright (C) 1997 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.  */

/* We need a special version of the `mcount' function because it has
   to preserve more registers than your usual function.  */

void __mcount_internal (unsigned long frompc, unsigned long selfpc);

#define _MCOUNT_DECL(frompc, selfpc) \
void __mcount_internal (unsigned long frompc, unsigned long selfpc)


/* Define MCOUNT as empty since we have the implementation in another
   file.  */
#define MCOUNT

--- NEW FILE: profil-counter.h ---
/* Low-level statistical profiling support function.  Linux/ipowerpc version.
   Copyright (C) 1996, 1997, 1998 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 <signal.h>
#include <bits/sigcontextinfo.h>

static void
profil_counter (int signo, SIGCONTEXT scp)
{
  profil_count ((void *) GET_PC (scp));
}


--- NEW FILE: sigcontextinfo.h ---
/* Copyright (C) 1998, 1999, 2001 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 <signal.h>

#define SIGCONTEXT struct sigcontext *
#define SIGCONTEXT_EXTRA_ARGS
#define GET_PC(ctx)	((void *)((ctx)->regs->nip))
#define GET_FRAME(ctx)	(*(void **)((ctx)->regs->gpr[1]))
#define GET_STACK(ctx)	((void *)((ctx)->regs->gpr[1]))
#define CALL_SIGHANDLER(handler, signo, ctx) \
  (handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))

--- NEW FILE: stackinfo.h ---
/* Copyright (C) 1999 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.  */

/* This file contains a bit of information about the stack allocation
   of the processor.  */

#ifndef _STACKINFO_H
#define _STACKINFO_H	1

/* On PPC the stack grows down.  */
#define _STACK_GROWS_DOWN	1

#endif	/* stackinfo.h */




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