mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-19 10:53:58 +00:00
85 lines
3.5 KiB
C
85 lines
3.5 KiB
C
/*-
|
|
* Copyright (c) 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 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.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#define ALIGN_DATA .align 2 /* 4 byte alignment, zero filled */
|
|
#define ALIGN_TEXT .align 2,0x90 /* 4-byte alignment, nop filled */
|
|
#define SUPERALIGN_TEXT .align 4,0x90 /* 16-byte alignment (better for 486), nop filled */
|
|
|
|
#define GEN_ENTRY(name) ALIGN_TEXT; .globl name; name:
|
|
#define NON_GPROF_ENTRY(name) GEN_ENTRY(_/**/name)
|
|
|
|
/* These three are place holders for future changes to the profiling code */
|
|
#define MCOUNT_LABEL(name)
|
|
#define MEXITCOUNT
|
|
#define FAKE_MCOUNT(caller)
|
|
|
|
#ifdef GPROF
|
|
/*
|
|
* ALTENTRY() must be before a corresponding ENTRY() so that it can jump
|
|
* over the mcounting.
|
|
*/
|
|
#define ALTENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; jmp 2f
|
|
#define ENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; 2:
|
|
/*
|
|
* The call to mcount supports the usual (bad) conventions. We allocate
|
|
* some data and pass a pointer to it although the FreeBSD doesn't use
|
|
* the data. We set up a frame before calling mcount because that is
|
|
* the standard convention although it makes work for both mcount and
|
|
* callers.
|
|
*/
|
|
#define MCOUNT .data; ALIGN_DATA; 1:; .long 0; .text; \
|
|
pushl %ebp; movl %esp,%ebp; \
|
|
movl $1b,%eax; call mcount; popl %ebp
|
|
#else
|
|
/*
|
|
* ALTENTRY() has to align because it is before a corresponding ENTRY().
|
|
* ENTRY() has to align to because there may be no ALTENTRY() before it.
|
|
* If there is a previous ALTENTRY() then the alignment code is empty.
|
|
*/
|
|
#define ALTENTRY(name) GEN_ENTRY(_/**/name)
|
|
#define ENTRY(name) GEN_ENTRY(_/**/name)
|
|
#define MCOUNT
|
|
|
|
#endif
|
|
|
|
#ifdef DUMMY_NOPS /* this will break some older machines */
|
|
#define FASTER_NOP
|
|
#define NOP
|
|
#else
|
|
#define FASTER_NOP pushl %eax ; inb $0x84,%al ; popl %eax
|
|
#define NOP pushl %eax ; inb $0x84,%al ; inb $0x84,%al ; popl %eax
|
|
#endif
|
|
|