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/*-
* 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_
#ifndef _SYS_CDEFS_H_
#error this file needs sys/cdefs.h as a prerequisite
#endif
#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)
#ifdef __GNUCLIKE_ASM
#define MCOUNT_OVERHEAD(label) \
__asm __volatile("pushq %0; call __mcount; popq %%rcx" \
: \
: "i" (label) \
: "ax", "dx", "cx", "di", "si", "r8", "r9", "memory")
#define MEXITCOUNT_OVERHEAD() \
__asm __volatile("call .mexitcount; 1:" \
: : \
: "ax", "dx", "cx", "di", "si", "r8", "r9", "memory")
#define MEXITCOUNT_OVERHEAD_GETLABEL(labelp) \
__asm __volatile("movq $1b,%0" : "=rm" (labelp))
#elif defined(lint)
#define MCOUNT_OVERHEAD(label)
#define MEXITCOUNT_OVERHEAD()
#define MEXITCOUNT_OVERHEAD_GETLABEL()
#else
#error this file needs to be ported to your compiler
#endif /* !__GNUCLIKE_ASM */
#else /* !GUPROF */
#define MCOUNT_DECL(s) register_t s;
#ifdef SMP
extern int mcount_lock;
#define MCOUNT_ENTER(s) { s = intr_disable(); \
while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \
/* nothing */ ; }
#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \
intr_restore(s); }
#else
#define MCOUNT_ENTER(s) { s = intr_disable(); }
#define MCOUNT_EXIT(s) (intr_restore(s))
#endif
#endif /* GUPROF */
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)
#else /* !_KERNEL */
#define FUNCTION_ALIGNMENT 4
#define _MCOUNT_DECL \
static void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __used; \
static void _mcount
#ifdef __GNUCLIKE_ASM
#define MCOUNT __asm(" \n\
.text \n\
.p2align 4,0x90 \n\
.globl .mcount \n\
.type .mcount,@function \n\
.mcount: \n\
pushq %rdi \n\
pushq %rsi \n\
pushq %rdx \n\
pushq %rcx \n\
pushq %r8 \n\
pushq %r9 \n\
pushq %rax \n\
movq 8(%rbp),%rdi \n\
movq 7*8(%rsp),%rsi \n\
call _mcount \n\
popq %rax \n\
popq %r9 \n\
popq %r8 \n\
popq %rcx \n\
popq %rdx \n\
popq %rsi \n\
popq %rdi \n\
ret \n\
.size .mcount, . - .mcount");
#if 0
/*
* We could use this, except it doesn't preserve the registers that were
* being passed with arguments to the function that we were inserted
* into. I've left it here as documentation of what the code above is
* supposed to do.
*/
#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("movq 8(%%rbp),%0" : "=r" (selfpc)); \
/* \
* frompc = pc pushed by call to mcount's caller. \
* The caller's stack frame has already been built, so %rbp 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("movq (%%rbp),%0" : "=r" (frompc)); \
frompc = ((uintfptr_t *)frompc)[1]; \
_mcount(frompc, selfpc); \
}
#endif
#else /* !__GNUCLIKE_ASM */
#define MCOUNT
#endif /* __GNUCLIKE_ASM */
typedef u_long uintfptr_t;
#endif /* _KERNEL */
/*
* An unsigned integral type that can hold non-negative difference between
* function pointers.
*/
typedef u_long fptrdiff_t;
#ifdef _KERNEL
void mcount(uintfptr_t frompc, uintfptr_t selfpc);
#else /* !_KERNEL */
#include <sys/cdefs.h>
__BEGIN_DECLS
#ifdef __GNUCLIKE_ASM
void mcount(void) __asm(".mcount");
#endif
__END_DECLS
#endif /* _KERNEL */
#endif /* !_MACHINE_PROFILE_H_ */
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