freebsd-dev/sys/powerpc/include/profile.h

/*-
 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 * 
 * 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 the
 * rights to redistribute these changes.
 *
 *	from: NetBSD: profile.h,v 1.9 1997/04/06 08:47:37 cgd Exp
 *	from: FreeBSD: src/sys/alpha/include/profile.h,v 1.4 1999/12/29
 * $FreeBSD$
 */

#ifndef _MACHINE_PROFILE_H_
#define	_MACHINE_PROFILE_H_

#define	_MCOUNT_DECL	void mcount

#define FUNCTION_ALIGNMENT 16

typedef u_int	fptrdiff_t;

#define	MCOUNT \
void \
_mcount() \
{ \
}

#ifdef _KERNEL
#define MCOUNT_ENTER(s)
#define MCOUNT_EXIT(s)
#define	MCOUNT_DECL(s)

void bintr(void);
void btrap(void);
void eintr(void);
void user(void);

#define	MCOUNT_FROMPC_USER(pc)					\
	((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)

#define	MCOUNT_FROMPC_INTR(pc)					\
	((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ?	\
	    ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr :	\
		(uintfptr_t)btrap) : ~0U)


#else	/* !_KERNEL */

typedef u_int	uintfptr_t;

#endif	/* _KERNEL */

#endif /* !_MACHINE_PROFILE_H_ */
/* -> /*- for license, minor formatting changes 2005-01-07 02:29:27 +00:00			`/*-`
Stub profile.h, required for userland builds. Approved by: Benno 2003-01-18 11:31:58 +00:00			`* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.`
			`* All rights reserved.`
			`*`
			`* Author: Chris G. Demetriou`
			`*`
			`* 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 the`
			`* rights to redistribute these changes.`
			`*`
			`* from: NetBSD: profile.h,v 1.9 1997/04/06 08:47:37 cgd Exp`
			`* from: FreeBSD: src/sys/alpha/include/profile.h,v 1.4 1999/12/29`
			`* $FreeBSD$`
			`*/`

			`#ifndef _MACHINE_PROFILE_H_`
			`#define _MACHINE_PROFILE_H_`

			`#define _MCOUNT_DECL void mcount`

			`#define FUNCTION_ALIGNMENT 16`

			`typedef u_int fptrdiff_t;`

			`#define MCOUNT \`
			`void \`
			`_mcount() \`
			`{ \`
			`}`

			`#ifdef _KERNEL`
			`#define MCOUNT_ENTER(s)`
			`#define MCOUNT_EXIT(s)`
			`#define MCOUNT_DECL(s)`
Move the kernel-specific logic to adjust frompc from MI to MD. For these two reasons: 1. On ia64 a function pointer does not hold the address of the first instruction of a functions implementation. It holds the address of a function descriptor. Hence the user(), btrap(), eintr() and bintr() prototypes are wrong for getting the actual code address. 2. The logic forces interrupt, trap and exception entry points to be layed-out contiguously. This can not be achieved on ia64 and is generally just bad programming. The MCOUNT_FROMPC_USER macro is used to set the frompc argument to some kernel address which represents any frompc that falls outside the kernel text range. The macro can expand to ~0U to bail out in that case. The MCOUNT_FROMPC_INTR macro is used to set the frompc argument to some kernel address to represent a call to a trap or interrupt handler. This to avoid that the trap or interrupt handler appear to be called from everywhere in the call graph. The macro can expand to ~0U to prevent adjusting frompc. Note that the argument is selfpc, not frompc. This commit defines the macros on all architectures equivalently to the original code in sys/libkern/mcount.c. People can take it from here... Compile-tested on: alpha, amd64, i386, ia64 and sparc64 Boot-tested on: i386 2004-08-27 19:42:35 +00:00
			`void bintr(void);`
			`void btrap(void);`
			`void eintr(void);`
			`void user(void);`

			`#define MCOUNT_FROMPC_USER(pc) \`
			`((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)`

			`#define MCOUNT_FROMPC_INTR(pc) \`
			`((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \`
			`((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \`
			`(uintfptr_t)btrap) : ~0U)`

Unbreak the PowerPC GENERIC build. Reviewed by: delphij 2005-06-11 10:59:02 +00:00
			`#else /* !_KERNEL */`

			`typedef u_int uintfptr_t;`

			`#endif /* _KERNEL */`
Stub profile.h, required for userland builds. Approved by: Benno 2003-01-18 11:31:58 +00:00
			`#endif /* !_MACHINE_PROFILE_H_ */`