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/* $NetBSD: asm.h,v 1.34 2020/04/23 23:22:41 jakllsch Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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. 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: @(#)asm.h 5.5 (Berkeley) 5/7/91
*/
#ifndef _ARM_ASM_H_
#define _ARM_ASM_H_
#include <arm/cdefs.h>
#if defined(_KERNEL_OPT)
#include "opt_cpuoptions.h"
#endif
#ifdef __thumb__
#define THUMB_INSN(n) n
#else
#define THUMB_INSN(n)
#endif
#define __BIT(n) (1 << (n))
#define __BITS(hi,lo) ((~((~0)<<((hi)+1)))&((~0)<<(lo)))
#define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask))
#define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask))
#define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask))
#define _C_LABEL(x) x
#define _ASM_LABEL(x) x
#ifdef __STDC__
# define __CONCAT(x,y) x ## y
# define __STRING(x) #x
#else
# define __CONCAT(x,y) x/**/y
# define __STRING(x) "x"
#endif
#ifndef _ALIGN_TEXT
# define _ALIGN_TEXT .align 2
#endif
#ifndef _TEXT_SECTION
#define _TEXT_SECTION .text
#endif
#ifdef __arm__
.syntax unified
/*
* gas/arm uses @ as a single comment character and thus cannot be used here
* Instead it recognised the # instead of an @ symbols in .type directives
* We define a couple of macros so that assembly code will not be dependent
* on one or the other.
*/
#define _ASM_TYPE_FUNCTION %function
#define _ASM_TYPE_OBJECT %object
#define _THUMB_ENTRY(x) \
_TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \
.thumb_func; .code 16; x:
#define _ARM_ENTRY(x) \
_TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; \
.code 32; x:
#ifdef __thumb__
#define _ENTRY(x) _THUMB_ENTRY(x)
#else
#define _ENTRY(x) _ARM_ENTRY(x)
#endif
#define _END(x) .size x,.-x
#ifdef GPROF
# define _PROF_PROLOGUE \
mov ip, lr; bl __mcount
#else
# define _PROF_PROLOGUE
#endif
#endif
#ifdef __aarch64__
#define _ASM_TYPE_FUNCTION @function
#define _ASM_TYPE_OBJECT @object
#define _ENTRY(x) \
_TEXT_SECTION; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x:
#define _END(x) .size x,.-x
#ifdef GPROF
# define _PROF_PROLOGUE \
stp x29, x30, [sp, #-16]!; \
mov fp, sp; \
bl __mcount; \
ldp x29, x30, [sp], #16;
#else
# define _PROF_PROLOGUE
#endif
#ifdef __PIC__
#define GOTREF(x) :got:x
#define GOTLO12(x) :got_lo12:x
#else
#define GOTREF(x) x
#define GOTLO12(x) :lo12:x
#endif
#endif
#ifdef ARMV85_BTI
#define _BTI_PROLOGUE \
.byte 0x5F, 0x24, 0x03, 0xD5 /* the "bti c" instruction */
#else
#define _BTI_PROLOGUE /* nothing */
#endif
#define ENTRY(y) _ENTRY(_C_LABEL(y)); _BTI_PROLOGUE ; _PROF_PROLOGUE
#define ENTRY_NP(y) _ENTRY(_C_LABEL(y)); _BTI_PROLOGUE
#define ENTRY_NBTI(y) _ENTRY(_C_LABEL(y))
#define END(y) _END(_C_LABEL(y))
#define ARM_ENTRY(y) _ARM_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
#define ARM_ENTRY_NP(y) _ARM_ENTRY(_C_LABEL(y))
#define THUMB_ENTRY(y) _THUMB_ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
#define THUMB_ENTRY_NP(y) _THUMB_ENTRY(_C_LABEL(y))
#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
#define ASEND(y) _END(_ASM_LABEL(y))
#define ARM_ASENTRY(y) _ARM_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define ARM_ASENTRY_NP(y) _ARM_ENTRY(_ASM_LABEL(y))
#define THUMB_ASENTRY(y) _THUMB_ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define THUMB_ASENTRY_NP(y) _THUMB_ENTRY(_ASM_LABEL(y))
#define ASMSTR .asciz
#ifdef __PIC__
#define REL_SYM(a, b) ((a) - (b))
#define PLT_SYM(x) x
#define GOT_SYM(x) PIC_SYM(x, GOT)
#define GOT_GET(x,got,sym) \
ldr x, sym; \
ldr x, [x, got]
#define GOT_INIT(got,gotsym,pclabel) \
ldr got, gotsym; \
pclabel: add got, got, pc
#ifdef __thumb__
#define GOT_INITSYM(gotsym,pclabel) \
.align 0; \
gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4)
#else
#define GOT_INITSYM(gotsym,pclabel) \
.align 0; \
gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8)
#endif
#ifdef __STDC__
#define PIC_SYM(x,y) x ## ( ## y ## )
#else
#define PIC_SYM(x,y) x/**/(/**/y/**/)
#endif
#else
#define REL_SYM(a, b) (a)
#define PLT_SYM(x) x
#define GOT_SYM(x) x
#define GOT_GET(x,got,sym) \
ldr x, sym;
#define GOT_INIT(got,gotsym,pclabel)
#define GOT_INITSYM(gotsym,pclabel)
#define PIC_SYM(x,y) x
#endif /* __PIC__ */
#define RCSID(x) .pushsection ".ident","MS",%progbits,1; \
.asciz x; \
.popsection
#define WEAK_ALIAS(alias,sym) \
.weak alias; \
alias = sym
/*
* STRONG_ALIAS: create a strong alias.
*/
#define STRONG_ALIAS(alias,sym) \
.globl alias; \
alias = sym
#ifdef __STDC__
#define WARN_REFERENCES(sym,msg) \
.pushsection .gnu.warning. ## sym; \
.ascii msg; \
.popsection
#else
#define WARN_REFERENCES(sym,msg) \
.pushsection .gnu.warning./**/sym; \
.ascii msg; \
.popsection
#endif /* __STDC__ */
#ifdef __thumb__
# define XPUSH push
# define XPOP pop
# define XPOPRET pop {pc}
#else
# define XPUSH stmfd sp!,
# define XPOP ldmfd sp!,
# ifdef _ARM_ARCH_5
# define XPOPRET ldmfd sp!, {pc}
# else
# define XPOPRET ldmfd sp!, {lr}; mov pc, lr
# endif
#endif
#if defined(__aarch64__)
# define RET ret
#elif defined (_ARM_ARCH_4T)
# define RET bx lr
# define RETr(r) bx r
# if defined(__thumb__)
# if defined(_ARM_ARCH_7)
# define RETc(c) it c; __CONCAT(bx,c) lr
# endif
# else
# define RETc(c) __CONCAT(bx,c) lr
# endif
#else
# define RET mov pc, lr
# define RETr(r) mov pc, r
# define RETc(c) __CONCAT(mov,c) pc, lr
#endif
#ifdef _ARM_ARCH_7
#define KMODTRAMPOLINE(n) \
_ENTRY(__wrap_ ## n) \
movw ip, #:lower16:n; \
movt ip, #:upper16:n; \
bx ip
#elif defined(_ARM_ARCH_4T)
#define KMODTRAMPOLINE(n) \
_ENTRY(__wrap_ ## n) \
ldr ip, [pc]; \
bx ip; \
.word n
#else
#define KMODTRAMPOLINE(n) \
_ENTRY(__wrap_ ## n) \
ldr pc, [pc, #-4]; \
.word n
#endif
#endif /* !_ARM_ASM_H_ */
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