mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-01 21:33:04 +00:00
91b4d1bfc2
- Don't use a frame pointer. Our callers need a frame pointer, but we
could only use one to support things that aren't supported. (These
things are:
- profiling of profiling
- debugging of profiling. The core ENTRY() macro doesn't support
forcing a frame pointer for debugging, so don't do more here.)
- Ensure that we are in the text section and have normal alignment.
- Use the normal syntax for `.type'.
202 lines
5.9 KiB
C
202 lines
5.9 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_
|
|
|
|
#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) u_long s;
|
|
#ifdef SMP
|
|
extern int mcount_lock;
|
|
#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \
|
|
while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \
|
|
/* nothing */ ; }
|
|
#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \
|
|
write_rflags(s); }
|
|
#else
|
|
#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); }
|
|
#define MCOUNT_EXIT(s) (write_rflags(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_ */
|