freebsd-dev/sys/sparc64/include/profile.h
Marcel Moolenaar 0f2fe153bc 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

71 lines
2.0 KiB
C

/*
* 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 FUNCTION_ALIGNMENT 32
#define _MCOUNT_DECL void mcount
#define MCOUNT
typedef u_long fptrdiff_t;
#ifdef _KERNEL
#include <machine/cpufunc.h>
#define MCOUNT_DECL(s) register_t s;
#define MCOUNT_ENTER(s) s = rdpr(pil); wrpr(pil, 0, 14)
#define MCOUNT_EXIT(s) wrpr(pil, 0, 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) : ~0UL)
void mcount(uintfptr_t frompc, uintfptr_t selfpc);
#else /* !_KERNEL */
typedef u_long uintfptr_t;
#endif /* _KERNEL */
#endif /* !_MACHINE_PROFILE_H_ */