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553cb3ed46
sys/param.h was manually adjusted to not define __NetBSD_Version__ since it will be defined by the compiler.
305 lines
8.7 KiB
C
Vendored
305 lines
8.7 KiB
C
Vendored
/* $NetBSD: asm.h,v 1.34 2020/04/23 23:22:41 jakllsch Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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 _ARM_ASM_H_
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#define _ARM_ASM_H_
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#include <arm/cdefs.h>
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#if defined(_KERNEL_OPT)
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#include "opt_cpuoptions.h"
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#endif
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#ifdef __thumb__
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#define THUMB_INSN(n) n
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#else
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#define THUMB_INSN(n)
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#endif
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#define __BIT(n) (1 << (n))
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#define __BITS(hi,lo) ((~((~0)<<((hi)+1)))&((~0)<<(lo)))
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#define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask))
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#define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask))
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#define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask))
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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 2
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#endif
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#ifndef _TEXT_SECTION
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#define _TEXT_SECTION .text
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#endif
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#ifdef __arm__
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.syntax unified
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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 dependent
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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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#define _THUMB_ENTRY(x) \
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_TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \
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.thumb_func; .code 16; x:
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#define _ARM_ENTRY(x) \
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_TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \
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.code 32; x:
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#ifdef __thumb__
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#define _ENTRY(x) _THUMB_ENTRY(x)
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#else
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#define _ENTRY(x) _ARM_ENTRY(x)
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#endif
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#define _END(x) .size x,.-x
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#ifdef GPROF
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# define _PROF_PROLOGUE \
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mov ip, lr; bl __mcount
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#else
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# define _PROF_PROLOGUE
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#endif
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#endif
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#ifdef __aarch64__
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#define _ASM_TYPE_FUNCTION @function
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#define _ASM_TYPE_OBJECT @object
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#define _ENTRY(x) \
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_TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x:
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#define _END(x) .size x,.-x
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#ifdef 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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#ifdef __PIC__
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#define GOTREF(x) :got:x
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#define GOTLO12(x) :got_lo12:x
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#else
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#define GOTREF(x) x
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#define GOTLO12(x) :lo12:x
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#endif
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#endif
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#ifdef ARMV85_BTI
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#define _BTI_PROLOGUE \
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.byte 0x5F, 0x24, 0x03, 0xD5 /* the "bti c" instruction */
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#else
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#define _BTI_PROLOGUE /* nothing */
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#endif
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#define ENTRY(y) _ENTRY(_C_LABEL(y)); _BTI_PROLOGUE ; _PROF_PROLOGUE
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#define ENTRY_NP(y) _ENTRY(_C_LABEL(y)); _BTI_PROLOGUE
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#define ENTRY_NBTI(y) _ENTRY(_C_LABEL(y))
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#define END(y) _END(_C_LABEL(y))
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#define ARM_ENTRY(y) _ARM_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
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#define ARM_ENTRY_NP(y) _ARM_ENTRY(_C_LABEL(y))
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#define THUMB_ENTRY(y) _THUMB_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
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#define THUMB_ENTRY_NP(y) _THUMB_ENTRY(_C_LABEL(y))
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#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
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#define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
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#define ASEND(y) _END(_ASM_LABEL(y))
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#define ARM_ASENTRY(y) _ARM_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
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#define ARM_ASENTRY_NP(y) _ARM_ENTRY(_ASM_LABEL(y))
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#define THUMB_ASENTRY(y) _THUMB_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
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#define THUMB_ASENTRY_NP(y) _THUMB_ENTRY(_ASM_LABEL(y))
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#define ASMSTR .asciz
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#ifdef __PIC__
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#define REL_SYM(a, b) ((a) - (b))
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#define PLT_SYM(x) x
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#define GOT_SYM(x) PIC_SYM(x, GOT)
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#define GOT_GET(x,got,sym) \
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ldr x, sym; \
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ldr x, [x, got]
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#define GOT_INIT(got,gotsym,pclabel) \
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ldr got, gotsym; \
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pclabel: add got, got, pc
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#ifdef __thumb__
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#define GOT_INITSYM(gotsym,pclabel) \
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.align 0; \
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gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4)
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#else
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#define GOT_INITSYM(gotsym,pclabel) \
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.align 0; \
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gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8)
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#endif
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#ifdef __STDC__
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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/**/(/**/y/**/)
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#endif
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#else
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#define REL_SYM(a, b) (a)
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#define PLT_SYM(x) x
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#define GOT_SYM(x) x
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#define GOT_GET(x,got,sym) \
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ldr x, sym;
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#define GOT_INIT(got,gotsym,pclabel)
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#define GOT_INITSYM(gotsym,pclabel)
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#define PIC_SYM(x,y) x
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#endif /* __PIC__ */
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#define RCSID(x) .pushsection ".ident","MS",%progbits,1; \
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.asciz x; \
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.popsection
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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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/*
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* STRONG_ALIAS: create a strong alias.
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*/
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#define STRONG_ALIAS(alias,sym) \
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.globl alias; \
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alias = sym
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#ifdef __STDC__
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#define WARN_REFERENCES(sym,msg) \
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.pushsection .gnu.warning. ## sym; \
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.ascii msg; \
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.popsection
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#else
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#define WARN_REFERENCES(sym,msg) \
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.pushsection .gnu.warning./**/sym; \
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.ascii msg; \
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.popsection
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#endif /* __STDC__ */
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#ifdef __thumb__
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# define XPUSH push
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# define XPOP pop
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# define XPOPRET pop {pc}
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#else
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# define XPUSH stmfd sp!,
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# define XPOP ldmfd sp!,
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# ifdef _ARM_ARCH_5
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# define XPOPRET ldmfd sp!, {pc}
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# else
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# define XPOPRET ldmfd sp!, {lr}; mov pc, lr
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# endif
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#endif
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#if defined(__aarch64__)
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# define RET ret
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#elif defined (_ARM_ARCH_4T)
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# define RET bx lr
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# define RETr(r) bx r
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# if defined(__thumb__)
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# if defined(_ARM_ARCH_7)
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# define RETc(c) it c; __CONCAT(bx,c) lr
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# endif
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# else
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# define RETc(c) __CONCAT(bx,c) lr
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# endif
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#else
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# define RET mov pc, lr
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# define RETr(r) mov pc, r
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# define RETc(c) __CONCAT(mov,c) pc, lr
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#endif
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#ifdef _ARM_ARCH_7
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#define KMODTRAMPOLINE(n) \
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_ENTRY(__wrap_ ## n) \
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movw ip, #:lower16:n; \
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movt ip, #:upper16:n; \
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bx ip
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#elif defined(_ARM_ARCH_4T)
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#define KMODTRAMPOLINE(n) \
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_ENTRY(__wrap_ ## n) \
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ldr ip, [pc]; \
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bx ip; \
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.word n
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#else
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#define KMODTRAMPOLINE(n) \
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_ENTRY(__wrap_ ## n) \
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ldr pc, [pc, #-4]; \
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.word n
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#endif
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#endif /* !_ARM_ASM_H_ */ |