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

[Erik Andersen]

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

Added Files:
	atomicity.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.  Sparc32 version.
   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.  */

#ifndef _ATOMICITY_H
#define _ATOMICITY_H	1

#include <inttypes.h>

static int
__attribute__ ((unused))
exchange_and_add (volatile uint32_t *mem, int val)
{
  static unsigned char lock;
  int result, tmp;

  __asm__ __volatile__("1:	ldstub	[%1], %0\n\t"
		       "	cmp	%0, 0\n\t"
		       "	bne	1b\n\t"
		       "	 nop"
		       : "=&r" (tmp)
		       : "r" (&lock)
		       : "memory");
  result = *mem;
  *mem += val;
  __asm__ __volatile__("stb	%%g0, [%0]"
		       : /* no outputs */
		       : "r" (&lock)
		       : "memory");
  return result;
}

static void
__attribute__ ((unused))
atomic_add (volatile uint32_t *mem, int val)
{
  static unsigned char lock;
  int tmp;

  __asm__ __volatile__("1:	ldstub	[%1], %0\n\t"
		       "	cmp	%0, 0\n\t"
		       "	bne	1b\n\t"
		       "	 nop"
		       : "=&r" (tmp)
		       : "r" (&lock)
		       : "memory");
  *mem += val;
  __asm__ __volatile__("stb	%%g0, [%0]"
		       : /* no outputs */
		       : "r" (&lock)
		       : "memory");
}

static int
__attribute__ ((unused))
compare_and_swap (volatile long int *p, long int oldval, long int newval)
{
  static unsigned char lock;
  int ret, tmp;

  __asm__ __volatile__("1:	ldstub	[%1], %0\n\t"
		       "	cmp	%0, 0\n\t"
		       "	bne	1b\n\t"
		       "	 nop"
		       : "=&r" (tmp)
		       : "r" (&lock)
		       : "memory");
  if (*p != oldval)
    ret = 0;
  else
    {
      *p = newval;
      ret = 1;
    }
  __asm__ __volatile__("stb	%%g0, [%0]"
		       : /* no outputs */
		       : "r" (&lock)
		       : "memory");

  return ret;
}

#endif /* atomicity.h */

--- NEW FILE: profil-counter.h ---
/* Low-level statistical profiling support function.  Linux/SPARC version.
   Copyright (C) 1997, 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.  */

#include <signal.h>

void
profil_counter (int signo, struct sigcontext *si)
{
  profil_count ((void *) si->si_regs.pc);
}

--- NEW FILE: sigcontextinfo.h ---
/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Jakub Jelinek <jakub at redhat.com>, 1999.

   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.  */

#define SIGCONTEXT struct sigcontext *
#define SIGCONTEXT_EXTRA_ARGS
#define GET_PC(__ctx)	((void *) ((__ctx)->si_regs.pc))
#define ADVANCE_STACK_FRAME(__next) \
	((void *) (((unsigned *)(__next))+14))

#define GET_STACK(__ctx)	((void *) (__ctx)->si_regs.u_regs[14])
#define GET_FRAME(__ctx)	ADVANCE_STACK_FRAME (GET_STACK(__ctx))
#define CALL_SIGHANDLER(handler, signo, ctx) \
  (handler)((signo), SIGCONTEXT_EXTRA_ARGS (ctx))

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

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

#ifndef _STACKINFO_H
#define _STACKINFO_H	1

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

#endif	/* stackinfo.h */