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/* $OpenBSD: asm.h,v 1.15 2020/10/26 22:07:06 gkoehler Exp $ */
/* $NetBSD: asm.h,v 1.1 1996/09/30 16:34:20 ws Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* 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 TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/
#ifndef _POWERPC_ASM_H_
#define _POWERPC_ASM_H_
/* XXX */
#define TARGET_ELF
#ifdef __PIC__
#define PIC_PROLOGUE XXX
#define PIC_EPILOGUE XXX
#ifdef __STDC__
#define PIC_PLT(x) x ## @plt
#define PIC_GOT(x) XXX
#define PIC_GOTOFF(x) XXX
#else /* not __STDC__ */
#define PIC_PLT(x) x/**/@plt
#define PIC_GOT(x) XXX
#define PIC_GOTOFF(x) XXX
#endif /* __STDC__ */
#else
#define PIC_PROLOGUE
#define PIC_EPILOGUE
#define PIC_PLT(x) x
#define PIC_GOT(x) x
#define PIC_GOTOFF(x) x
#endif
#ifdef TARGET_ELF
# define _C_LABEL(x) x
#endif
#define _ASM_LABEL(x) x
#ifdef __STDC__
# define _TMP_LABEL(x) .L_ ## x
#else
# define _TMP_LABEL(x) .L_/**/x
#endif
#define _ENTRY(x) \
.text; .align 2; .globl x; .type x,@function; x:
#if defined(PROF) || defined(GPROF)
# define _PROF_PROLOGUE(y) \
.section ".data"; \
.align 2; \
_TMP_LABEL(y):; \
.long 0; \
.section ".text"; \
mflr 0; \
addis 11, 11, _TMP_LABEL(y)@ha; \
stw 0, 4(1); \
addi 0, 11,_TMP_LABEL(y)@l; \
bl _mcount;
#else
# define _PROF_PROLOGUE(y)
#endif
#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE(y)
#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE(y)
#define END(y) .size y, . - y
#define STRONG_ALIAS(alias,sym) \
.global alias; .set alias,sym
#define WEAK_ALIAS(alias,sym) \
.weak alias; .set alias,sym
#if defined(_RET_PROTECTOR)
# if defined(__PIC__)
# define RETGUARD_LOAD_RANDOM(x, reg) \
bcl 20, 31, 66f; \
66: mflr reg; \
addis reg, reg, (__retguard_ ## x - 66b)@ha; \
lwz reg, ((__retguard_ ## x - 66b)@l)(reg)
# else
# define RETGUARD_LOAD_RANDOM(x, reg) \
lis reg, (__retguard_ ## x)@ha; \
lwz reg, ((__retguard_ ## x)@l)(reg)
# endif
# define RETGUARD_SETUP(x) \
RETGUARD_SYMBOL(x); \
mflr %r12; \
RETGUARD_LOAD_RANDOM(x, %r11); \
xor %r11, %r11, %r12
# define RETGUARD_CHECK(x) \
xor %r11, %r11, %r12; \
RETGUARD_LOAD_RANDOM(x, %r10); \
mtlr %r12; \
twne %r11, %r10
# define RETGUARD_SYMBOL(x) \
.ifndef __retguard_ ## x; \
.hidden __retguard_ ## x; \
.type __retguard_ ## x,@object; \
.pushsection .openbsd.randomdata.retguard,"aw",@progbits; \
.weak __retguard_ ## x; \
.p2align 2; \
__retguard_ ## x: ; \
.long 0; \
.size __retguard_ ## x, 4; \
.popsection; \
.endif
#else
# define RETGUARD_LOAD_RANDOM(x, reg)
# define RETGUARD_SETUP(x)
# define RETGUARD_CHECK(x)
# define RETGUARD_SYMBOL(x)
#endif
#endif /* !_POWERPC_ASM_H_ */
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