be16a3aba0
didn't set up the frame pointer before calling mcount, and then jumped to the wrong place in ENTRY() to defeat the point of the jump.
172 lines
5.2 KiB
C
172 lines
5.2 KiB
C
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* 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.
|
|
*
|
|
* from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_ASM_H_
|
|
#define _MACHINE_ASM_H_
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#ifdef PIC
|
|
#define PIC_PROLOGUE \
|
|
pushl %ebx; \
|
|
call 1f; \
|
|
1: \
|
|
popl %ebx; \
|
|
addl $_GLOBAL_OFFSET_TABLE_+[.-1b],%ebx
|
|
#define PIC_EPILOGUE \
|
|
popl %ebx
|
|
#define PIC_PLT(x) x@PLT
|
|
#define PIC_GOT(x) x@GOT(%ebx)
|
|
#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
|
|
#else
|
|
#define PIC_PROLOGUE
|
|
#define PIC_EPILOGUE
|
|
#define PIC_PLT(x) x
|
|
#define PIC_GOT(x) x
|
|
#define PIC_GOTOFF(x) x
|
|
#endif
|
|
|
|
/*
|
|
* CNAME and HIDENAME manage the relationship between symbol names in C
|
|
* and the equivalent assembly language names. CNAME is given a name as
|
|
* it would be used in a C program. It expands to the equivalent assembly
|
|
* language name. HIDENAME is given an assembly-language name, and expands
|
|
* to a possibly-modified form that will be invisible to C programs.
|
|
*/
|
|
#ifdef __ELF__
|
|
#define CNAME(csym) csym
|
|
#define HIDENAME(asmsym) __CONCAT(.,asmsym)
|
|
#else
|
|
#define CNAME(csym) __CONCAT(_,csym)
|
|
#define HIDENAME(asmsym) asmsym
|
|
#endif
|
|
|
|
/* XXX should use .p2align 4,0x90 for -m486. */
|
|
#define _START_ENTRY .text; .p2align 2,0x90
|
|
|
|
#define _ENTRY(x) _START_ENTRY; \
|
|
.globl CNAME(x); .type CNAME(x),@function; CNAME(x):
|
|
|
|
#ifdef PROF
|
|
#define ALTENTRY(x) _ENTRY(x); \
|
|
pushl %ebp; movl %esp,%ebp; \
|
|
call PIC_PLT(HIDENAME(mcount)); \
|
|
popl %ebp; \
|
|
jmp 9f
|
|
#define ENTRY(x) _ENTRY(x); \
|
|
pushl %ebp; movl %esp,%ebp; \
|
|
call PIC_PLT(HIDENAME(mcount)); \
|
|
popl %ebp; \
|
|
9:
|
|
#else
|
|
#define ALTENTRY(x) _ENTRY(x)
|
|
#define ENTRY(x) _ENTRY(x)
|
|
#endif
|
|
|
|
#define RCSID(x) .text; .asciz x
|
|
|
|
#ifdef _ARCH_INDIRECT
|
|
/*
|
|
* Generate code to select between the generic functions and _ARCH_INDIRECT
|
|
* specific ones.
|
|
* XXX nested __CONCATs don't work with non-ANSI cpp's.
|
|
*/
|
|
#define ANAME(x) CNAME(__CONCAT(__CONCAT(__,_ARCH_INDIRECT),x))
|
|
#define ASELNAME(x) CNAME(__CONCAT(__arch_select_,x))
|
|
#define AVECNAME(x) CNAME(__CONCAT(__arch_,x))
|
|
#define GNAME(x) CNAME(__CONCAT(__generic_,x))
|
|
|
|
/* Don't bother profiling this. */
|
|
#ifdef PIC
|
|
#define ARCH_DISPATCH(x) \
|
|
_START_ENTRY; \
|
|
.globl CNAME(x); .type CNAME(x),@function; CNAME(x): ; \
|
|
PIC_PROLOGUE; \
|
|
movl PIC_GOT(AVECNAME(x)),%eax; \
|
|
PIC_EPILOGUE; \
|
|
jmpl *(%eax)
|
|
|
|
#define ARCH_SELECT(x) _START_ENTRY; \
|
|
.type ASELNAME(x),@function; \
|
|
ASELNAME(x): \
|
|
PIC_PROLOGUE; \
|
|
call PIC_PLT(CNAME(__get_hw_float)); \
|
|
testl %eax,%eax; \
|
|
movl PIC_GOT(ANAME(x)),%eax; \
|
|
jne 8f; \
|
|
movl PIC_GOT(GNAME(x)),%eax; \
|
|
8: \
|
|
movl PIC_GOT(AVECNAME(x)),%edx; \
|
|
movl %eax,(%edx); \
|
|
PIC_EPILOGUE; \
|
|
jmpl *%eax
|
|
#else /* !PIC */
|
|
#define ARCH_DISPATCH(x) \
|
|
_START_ENTRY; \
|
|
.globl CNAME(x); .type CNAME(x),@function; CNAME(x): ; \
|
|
jmpl *AVECNAME(x)
|
|
|
|
#define ARCH_SELECT(x) _START_ENTRY; \
|
|
.type ASELNAME(x),@function; \
|
|
ASELNAME(x): \
|
|
call CNAME(__get_hw_float); \
|
|
testl %eax,%eax; \
|
|
movl $ANAME(x),%eax; \
|
|
jne 8f; \
|
|
movl $GNAME(x),%eax; \
|
|
8: \
|
|
movl %eax,AVECNAME(x); \
|
|
jmpl *%eax
|
|
#endif /* PIC */
|
|
|
|
#define ARCH_VECTOR(x) .data; .p2align 2; \
|
|
.globl AVECNAME(x); \
|
|
.type AVECNAME(x),@object; \
|
|
.size AVECNAME(x),4; \
|
|
AVECNAME(x): .long ASELNAME(x)
|
|
|
|
#undef _ENTRY
|
|
#define _ENTRY(x) ARCH_VECTOR(x); ARCH_SELECT(x); ARCH_DISPATCH(x); \
|
|
_START_ENTRY; \
|
|
.globl ANAME(x); .type ANAME(x),@function; ANAME(x):
|
|
|
|
#endif /* _ARCH_INDIRECT */
|
|
|
|
#endif /* !_MACHINE_ASM_H_ */
|