e77c22bf45
high resolution kernel profiling (options GUPROF. "U" in GUPROF stands for microseconds resolution, but the resolution is now smaller than 1 nanosecond on multi-GHz machines and the accuracy is heading towards 1 nanosecond too). Arches that support GUPROF must now provide certain macros for the calibration. GUPROF is now only supported for i386's, so the absence of the new macros for other arches doesn't break anything that wasn't already broken. amd64's have uncommitted support for GUPROF, and sparc64's have support that seems to be complete except here (there was an #error for non-i386 cases; now there are undefined macros). Changed the asms a little: - declare them as __volatile. They must not be moved, and exporting a label across asms is technically incorrect, so try harder to stop gcc moving them. - don't put the non-clobbered register "bx" in the clobber list. The clobber lists are still more conservative than necessary. - drop the non-support for gcc-1. It just gave a better error message, and this is not useful since compiling with gcc-1 would cause thousands of worse error messages. - drop the support for aout.
154 lines
4.7 KiB
C
154 lines
4.7 KiB
C
/*
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)profile.h 8.1 (Berkeley) 6/11/93
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_PROFILE_H_
|
|
#define _MACHINE_PROFILE_H_
|
|
|
|
#ifdef _KERNEL
|
|
|
|
/*
|
|
* Config generates something to tell the compiler to align functions on 16
|
|
* byte boundaries. A strict alignment is good for keeping the tables small.
|
|
*/
|
|
#define FUNCTION_ALIGNMENT 16
|
|
|
|
/*
|
|
* The kernel uses assembler stubs instead of unportable inlines.
|
|
* This is mainly to save a little time when profiling is not enabled,
|
|
* which is the usual case for the kernel.
|
|
*/
|
|
#define _MCOUNT_DECL void mcount
|
|
#define MCOUNT
|
|
|
|
#ifdef GUPROF
|
|
#define MCOUNT_DECL(s)
|
|
#define MCOUNT_ENTER(s)
|
|
#define MCOUNT_EXIT(s)
|
|
#if defined(__GNUC__) || defined(__INTEL_COMPILER)
|
|
#define MCOUNT_OVERHEAD(label) \
|
|
__asm __volatile("pushl %0; call __mcount; popl %%ecx" \
|
|
: \
|
|
: "i" (profil) \
|
|
: "ax", "dx", "cx", "memory")
|
|
#define MEXITCOUNT_OVERHEAD() \
|
|
__asm __volatile("call .mexitcount; 1:" \
|
|
: : \
|
|
: "ax", "dx", "cx", "memory")
|
|
#define MEXITCOUNT_OVERHEAD_GETLABEL(labelp) \
|
|
__asm __volatile("movl $1b,%0" : "=rm" (labelp))
|
|
#elif defined(lint)
|
|
#define MCOUNT_OVERHEAD(label)
|
|
#define MEXITCOUNT_OVERHEAD()
|
|
#define MEXITCOUNT_OVERHEAD_GETLABEL()
|
|
#else
|
|
#error
|
|
#endif /* !(__GNUC__ || __INTEL_COMPILER) */
|
|
#else /* !GUPROF */
|
|
#define MCOUNT_DECL(s) u_long s;
|
|
#ifdef SMP
|
|
extern int mcount_lock;
|
|
#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); \
|
|
while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \
|
|
/* nothing */ ; }
|
|
#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \
|
|
write_eflags(s); }
|
|
#else
|
|
#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); }
|
|
#define MCOUNT_EXIT(s) (write_eflags(s))
|
|
#endif
|
|
#endif /* GUPROF */
|
|
|
|
#else /* !_KERNEL */
|
|
|
|
#define FUNCTION_ALIGNMENT 4
|
|
|
|
#define _MCOUNT_DECL static __inline void _mcount
|
|
|
|
#if defined(__GNUC__) || defined(__INTEL_COMPILER)
|
|
#define MCOUNT \
|
|
void \
|
|
mcount() \
|
|
{ \
|
|
uintfptr_t selfpc, frompc; \
|
|
/* \
|
|
* Find the return address for mcount, \
|
|
* and the return address for mcount's caller. \
|
|
* \
|
|
* selfpc = pc pushed by call to mcount \
|
|
*/ \
|
|
__asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
|
|
/* \
|
|
* frompc = pc pushed by call to mcount's caller. \
|
|
* The caller's stack frame has already been built, so %ebp is \
|
|
* the caller's frame pointer. The caller's raddr is in the \
|
|
* caller's frame following the caller's caller's frame pointer.\
|
|
*/ \
|
|
__asm("movl (%%ebp),%0" : "=r" (frompc)); \
|
|
frompc = ((uintfptr_t *)frompc)[1]; \
|
|
_mcount(frompc, selfpc); \
|
|
}
|
|
#else /* !(__GNUC__ || __INTEL_COMPILER) */
|
|
void \
|
|
#define MCOUNT \
|
|
mcount() \
|
|
{ \
|
|
}
|
|
#endif /* __GNUC__ || __INTEL_COMPILER */
|
|
|
|
typedef u_int uintfptr_t;
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
/*
|
|
* An unsigned integral type that can hold non-negative difference between
|
|
* function pointers.
|
|
*/
|
|
typedef u_int fptrdiff_t;
|
|
|
|
#ifdef _KERNEL
|
|
|
|
void mcount(uintfptr_t frompc, uintfptr_t selfpc);
|
|
|
|
#else /* !_KERNEL */
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
__BEGIN_DECLS
|
|
#if defined(__GNUC__) || defined(__INTEL_COMPILER)
|
|
void mcount(void) __asm(".mcount");
|
|
#endif
|
|
__END_DECLS
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_MACHINE_PROFILE_H_ */
|