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1311e997d4
This excludes all headers in /usr/include/dev because that directory is bonkers huge (18M). We can add these on an as-needed basis.
150 lines
No EOL
4.5 KiB
C
Vendored
150 lines
No EOL
4.5 KiB
C
Vendored
/* $OpenBSD: asm.h,v 1.12 2023/03/27 19:02:48 kettenis Exp $ */
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/* $NetBSD: asm.h,v 1.4 2001/07/16 05:43:32 matt Exp $ */
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/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)asm.h 5.5 (Berkeley) 5/7/91
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*/
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#ifndef _MACHINE_ASM_H_
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#define _MACHINE_ASM_H_
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#define _C_LABEL(x) x
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#define _ASM_LABEL(x) x
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#ifdef __STDC__
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# define __CONCAT(x,y) x ## y
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# define __STRING(x) #x
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#else
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# define __CONCAT(x,y) x/**/y
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# define __STRING(x) "x"
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#endif
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#ifndef _ALIGN_TEXT
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# define _ALIGN_TEXT .align 0
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#endif
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/*
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* gas/arm uses @ as a single comment character and thus cannot be used here
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* Instead it recognised the # instead of an @ symbols in .type directives
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* We define a couple of macros so that assembly code will not be dependant
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* on one or the other.
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*/
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#define _ASM_TYPE_FUNCTION #function
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#define _ASM_TYPE_OBJECT #object
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/* NB == No Binding: use .globl or .weak as necessary */
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#define _ENTRY_NB(x) \
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.text; _ALIGN_TEXT; .type x,_ASM_TYPE_FUNCTION; x:
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#define _ENTRY(x) .globl x; _ENTRY_NB(x)
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#if defined(PROF) || defined(GPROF)
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# define _PROF_PROLOGUE \
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stp x29, x30, [sp, #-16]!; \
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mov fp, sp; \
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bl __mcount; \
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ldp x29, x30, [sp], #16;
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#else
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# define _PROF_PROLOGUE
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#endif
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#if defined(_RET_PROTECTOR)
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# define RETGUARD_CALC_COOKIE(reg) \
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eor reg, reg, x30
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# define RETGUARD_LOAD_RANDOM(x, reg) \
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adrp reg, __CONCAT(__retguard_, x); \
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ldr reg, [reg, :lo12:__CONCAT(__retguard_, x)]
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# define RETGUARD_SETUP(x, reg) \
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RETGUARD_SYMBOL(x); \
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RETGUARD_LOAD_RANDOM(x, reg); \
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RETGUARD_CALC_COOKIE(reg)
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# define RETGUARD_CHECK(x, reg) \
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RETGUARD_CALC_COOKIE(reg); \
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RETGUARD_LOAD_RANDOM(x, x9); \
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subs reg, reg, x9; \
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cbz reg, 66f; \
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brk #0x1; \
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66:
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# define RETGUARD_PUSH(reg) \
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str reg, [sp, #-16]!
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# define RETGUARD_POP(reg) \
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ldr reg, [sp, #16]!
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# define RETGUARD_SYMBOL(x) \
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.ifndef __CONCAT(__retguard_, x); \
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.hidden __CONCAT(__retguard_, x); \
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.type __CONCAT(__retguard_, x),@object; \
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.pushsection .openbsd.randomdata.retguard,"aw",@progbits; \
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.weak __CONCAT(__retguard_, x); \
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.p2align 3; \
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__CONCAT(__retguard_, x): ; \
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.xword 0; \
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.size __CONCAT(__retguard_, x), 8; \
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.popsection; \
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.endif
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#else
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# define RETGUARD_CALC_COOKIE(reg)
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# define RETGUARD_LOAD_RANDOM(x, reg)
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# define RETGUARD_SETUP(x, reg)
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# define RETGUARD_CHECK(x, reg)
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# define RETGUARD_PUSH(reg)
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# define RETGUARD_POP(reg)
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# define RETGUARD_SYMBOL(x)
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#endif
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#define ENTRY(y) _ENTRY(y); bti c; _PROF_PROLOGUE
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#define ENTRY_NP(y) _ENTRY(y); bti c
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#define ENTRY_NB(y) _ENTRY_NB(y); bti c; _PROF_PROLOGUE
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#define ASENTRY(y) _ENTRY(y); bti c; _PROF_PROLOGUE
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#define ASENTRY_NP(y) _ENTRY(y); bti c
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#define END(y) .size y, . - y
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#define EENTRY(sym) .globl sym; sym:
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#define EEND(sym)
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#ifdef __PIC__
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#define PIC_SYM(x,y) x(y)
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#else
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#define PIC_SYM(x,y) x
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#endif
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#define STRONG_ALIAS(alias,sym) \
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.global alias; \
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alias = sym
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#define WEAK_ALIAS(alias,sym) \
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.weak alias; \
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alias = sym
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#endif /* !_MACHINE_ASM_H_ */ |